JP6794299B2 - combine - Google Patents

Description

The present invention relates to a combine equipped with a cutting section for cutting uncut grain culms in a field and a threshing section for threshing the grains of the cut grain culms.

The conventional combine employs a configuration in which the power of the engine mounted on the traveling body is transmitted to the left and right traveling parts such as a traveling crawler via a driving device. For example, the combine described in Patent Document 1 is a crawler type. The output of the drive device is adjusted according to the amount of operation of the main speed change lever and the steering handle provided in the control unit. The main speed change lever and the steering handle are interlocked and connected to the drive device via a steering case for converting the amount of operation and a connecting link body. Due to the action of the internal mechanism of the steering case, the combine described in Patent Document 1 can be operated at the same operation interval as that of a four-wheeled vehicle, although it is a crawler type.

Japanese Unexamined Patent Publication No. 2012-085598

However, in the head-feeding combine of Patent Document 1, since the straight-ahead hydraulic continuously variable transmission and the swivel hydraulic continuously variable transmission are arranged at positions away from the control unit with the transmission case in between, the steering case and the drive device The link mechanism that connects to and is lengthened. Therefore, the link mechanism may be bent or pulled due to the influence of mechanical vibration, and the operation responsiveness may be deteriorated.

Therefore, the present invention is intended to provide a combine that has been improved by examining these current conditions.

In order to achieve the above object, the combine of the present invention includes a cutting section for taking in uncut grain stalks while cutting, a shaving section for bleeding the shaving grain supplied from the shaving section, and a grain removal section below the grain removal section. a winnowing fan supplying sorting wind arranged grain sorting mechanism, reaping and feeder house to be introduced into the threshing section conveys the culms, the and traveling machine body is arranged on one side of the machine body transverse direction of the feeder house A drive device that shifts the power of the mounted engine and transmits it to the left and right traveling parts, a straight-moving operation tool for straight-ahead operation, a turning operation tool for turning operation, and the driving according to the operation amount of both operating tools. In a combine having a steering case for changing the output of the device and arranging both operating tools in a control unit located on one side of the front part of the traveling machine in the width direction of the drive device. A straight-ahead hydraulic continuously variable transmission and a swivel hydraulic continuously variable transmission for shifting the power of the engine are arranged side by side on the control side of the left and right side surfaces of the drive device, and the straight-ahead hydraulic continuously variable transmission is arranged side by side. A forward / reverse switching case as a forward / reverse switching mechanism that drives the supply conveyor in the feeder house in the forward / reverse direction by projecting the straight-moving operation shaft of the machine and the turning operation shaft of the swivel hydraulic continuously variable transmission in the front-rear direction. The forward / reverse switching case is arranged on the other side of the feeder house in the width direction of the machine body , and the cutting portion is provided with a counter shaft for transmitting the driving force of the engine, and the Karami shaft, which is the rotation shaft of the Karami, is provided. , The counter shaft has a hollow tube shape, and the counter shaft is inserted in the hollow portion of the Karami shaft .
The combine may have a drive shaft extending in the width direction of the machine body to drive the supply conveyor, and the drive force may be input to the drive shaft from the other end in the width direction of the machine body. ..

In the combine, the steering case is arranged below the control unit and above the drive device, and a straight-ahead output shaft and a turning output shaft are projected from the steering case, and the straight-ahead output shaft and the straight-ahead A straight-ahead link body connecting the operation shaft and a swivel link body connecting the swivel output shaft and the swivel operation shaft are each installed between the steering case and the drive device in a plan view. May be.

In the combine, the steering case is fixed to a case support frame erected in the middle of the left and right support leg frames that support the front position of the control portion, and the straight connecting link body is the support leg on the drive device side. It may be supported by the frame.

According to the present invention, since the straight-ahead hydraulic continuously variable transmission and the turning hydraulic continuously variable transmission are arranged side by side on the control unit side, the connection structure with the steering case can be shortened, and the operation response of the drive device by the operating tool can be shortened. The sex can be maintained in a good state. In addition, since a space is created on the side of the feeder house side of the drive device, the degree of freedom in designing the cutting section is increased, and the feeder house can be configured with an optimum size for the cutting amount of the cutting section and the cutting width of the grain header. In addition, since the installation width of the feed house in the left-right direction is widened, the feed house can be installed on the side close to the position of the center of gravity when raising and lowering the grain header, and the support strength of the feeder house in the cutting section can be increased. ..

According to the present invention, by arranging the straight-ahead operation shaft and the turning operation shaft in the front-rear direction, the same positional relationship as the straight-ahead output shaft and the turning output shaft arranged in the front-rear direction in the steering case can be obtained. As a result, the structure of the link mechanism from the steering case to the straight-ahead hydraulic continuously variable transmission and the turning hydraulic continuously variable transmission can be simplified, and the continuously variable transmission case and the steering case are brought close to each other below the control unit to be compact. Can be installed in. In addition, it is possible to suppress a deviation between the operating amount of the straight-ahead operating tool and the turning operating tool and the output of the drive device, and maintain a stable running state according to the operator's operation.

According to the present invention, the straight connecting link body is supported by a support leg frame that supports the control unit. Therefore, even if the linearly connected link body is bent or pulled due to the vibration of the drive device, the linearly connected link body can be supported with high rigidity by the support leg frame that supports the control unit, and the fluctuation and deformation of the linearly connected link body can be suppressed. ..

According to the present invention, since the swivel connection link body is supported on the upper surface of the transmission case and on the continuously variable transmission case side, the space between the feeder house and the control unit is used to vibrate the continuously variable transmission case. The swivel connection link body can be supported compactly and with high rigidity on the mission case having the same system.

It is a left side view of the combine which shows the 1st Embodiment of this invention. It is a right side view of the combine. It is a plan view of the combine. It is a drive system diagram of a combine. It is a perspective view of the combine seen from an oblique front. It is a partial plan sectional view of a threshing part. It is a drive system diagram of a mission case. It is a top sectional view which shows the structure around an engine room. It is a hydraulic circuit diagram which shows the structure of the work system hydraulic circuit. It is a front view which shows the arrangement structure of the hydraulic circuit component. It is a hydraulic circuit diagram which shows the structure of the traveling system hydraulic circuit. It is a perspective view which looked at the front part of the traveling machine body from the diagonally left front. It is a perspective view which looked at the area around the driver's cab (control part) from the diagonally left rear view. It is a front view around the driver's cab (control part). It is a top view around the driver's cab (control part). It is a perspective view of the area around the driver's cab (control unit) viewed diagonally from the rear right. It is a perspective view which looked at the periphery of a driver's cab (control part) from the front.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings (FIGS. 1 to 17) applied to the conventional combine harvester. FIG. 1 is a left side view of the combine, FIG. 2 is a right side view, and FIG. 3 is a plan view. First, the schematic structure of the combine will be described with reference to FIGS. 1 to 3. In the following description, the left side of the traveling machine 1 in the forward direction is simply referred to as the left side, and the right side in the forward direction is simply referred to as the right side.

As shown in FIGS. 1 to 3, the ordinary combine harvester in the embodiment includes a traveling machine body 1 supported by a pair of left and right crawler belts 2 made of rubber crawlers as traveling portions. On the front part of the traveling machine 1, a cutting unit 3 for taking in uncut grain culms such as rice (or wheat or soybean or tomorokoshi) while cutting is mounted on a single-acting hydraulic cylinder 4 for raising and lowering so as to be adjustable. ing.

On the left side of the traveling machine 1, a threshing section 9 for threshing the cut grain culms supplied from the cutting section 3 is mounted. A grain sorting mechanism 10 for rocking sorting and wind sorting is arranged below the threshing section 9. On the right side of the front portion of the traveling machine body 1, a driver's cab 5 as a control unit on which the operator is boarded is mounted. The engine 7 as a power source is arranged in the driver's cab 5 (below the driver's seat 42). Behind the driver's cab 5 (on the right side of the traveling machine 1), there is a Glen tank 6 that takes out grains from the threshing section 9, and grains that discharge the grains in the Glen tank 6 toward the truck bed (or container, etc.). The discharge conveyor 8 is arranged. The grain discharge conveyor 8 is tilted toward the outside of the machine, and the grains in the grain tank 6 are carried out by the grain discharge conveyor 8.

The cutting section 3 includes a feeder house 11 that communicates with the handling port 9a at the front of the threshing section 9, and a horizontally long bucket-shaped grain header 12 that is connected to the front end of the feeder house 11. The scraping auger 13 (platform auger) is rotatably supported in the grain header 12. A scraping reel 14 with a tine bar is arranged above the front portion of the scraping auger 13. A clipper-shaped cutting blade 15 is arranged at the front portion of the grain header 12. Left and right cursive scripts 16 are projected on both left and right sides of the front portion of the grain header 12. Further, a supply conveyor 17 is installed internally in the feeder house 11. A beater 18 (front rotor) for feeding cut grain culms is provided on the feed end side (handle 9a) of the supply conveyor 17. The lower surface portion of the feeder house 11 and the front end portion of the traveling machine body 1 are connected via the lifting hydraulic cylinder 4, and the cutting section 3 cuts with the cutting input shaft 89 (feeder house conveyor shaft) described later as a lifting fulcrum. It moves up and down with the lifting hydraulic cylinder 4.

With the above configuration, the tip side of the uncut grain culm between the left and right weed bodies 16 is scraped by the scraping reel 14, the culm side of the uncut grain culm is trimmed by the cutting blade 15, and the scraping auger 13 By the rotary drive, the cut grain culms are collected near the entrance of the feeder house 11 near the center of the left and right width of the grain header 12. The entire amount of the cut grain culm of the grain header 12 is conveyed by the supply conveyor 17 and is fed by the beater 18 into the handling port 9a of the threshing section 9. A hydraulic cylinder for horizontal control (not shown) for rotating the grain header 12 around the axis of the horizontal control fulcrum is provided, and the inclination of the grain header 12 in the left-right direction is adjusted by the hydraulic cylinder for horizontal control to adjust the grain header. It is also possible to support the cutting blade 15, the cutting blade 15, and the scraping reel 14 horizontally with respect to the field scene.

Further, as shown in FIGS. 1 and 3, the handling cylinder 21 is rotatably provided in the handling chamber of the threshing unit 9. The handling cylinder 21 is pivotally supported by the handling cylinder shaft 20 (see FIG. 4) extended in the front-rear direction of the traveling machine body 1. A receiving net 24 for leaking grains is stretched on the lower side of the handling cylinder 21. A spiral screw blade-shaped intake blade 25 is provided so as to project outward in the radial direction on the outer peripheral surface of the front portion of the handling cylinder 21.

With the above configuration, the threshing culm thrown in from the handling port 9a by the beater 18 is conveyed toward the rear of the traveling machine 1 by the rotation of the handling cylinder 21, and is transferred between the handling cylinder 21 and the receiving net 24. It is kneaded and threshed. Threshing such as grains smaller than the mesh of the receiving net 24 leaks from the receiving net 24. Straw debris and the like that do not leak from the receiving net 24 are discharged to the field from the dust outlet 23 at the rear of the threshing section 9 by the transporting action of the handling cylinder 21.

A plurality of dust feeding valves (not shown) for adjusting the transfer speed of threshing in the handling chamber are rotatably pivotally attached to the upper side of the handling cylinder 21. By adjusting the angle of the dust feed valve, the transfer speed (residence time) of threshing in the handling room can be adjusted according to the variety and properties of the harvested culm. On the other hand, as the grain sorting mechanism 10 arranged below the threshing section 9, a swing sorting board 26 for specific gravity sorting having a grain pan, a chaff sheave, a grain sheave, a straw rack, and the like is provided.

Further, as the grain sorting mechanism 10, a blower fan-shaped wall insert 29 or the like that supplies sorting air to the rocking sorting board 26 is provided. The threshing that has been threshed by the handling cylinder 21 and leaked from the receiving net 24 is produced by the specific gravity sorting action of the rocking sorting board 26 and the wind sorting action of the blower fan-shaped wall insert 29. It is configured to be sorted and taken out as a product), a mixture of grains and straw (second product such as grains with branch stems), and straw waste.

The first conveyor mechanism 30 and the second conveyor mechanism 31 are provided as the grain sorting mechanism 10 on the lower side of the rocking sorting machine 26. By sorting the rocking sorting machine 26 and the fan-shaped wall insert 29, the grains (first thing) dropped from the rocking sorting machine 26 are collected in the grain tank 6 by the first conveyor mechanism 30 and the grain raising conveyor 32. To. The mixture of grains and straw (second product) is returned to the sorting start end side of the rocking sorting plate 26 via the second conveyor mechanism 31 and the second reduction conveyor 33, and is re-sorted by the rocking sorting plate 26. Ru. Straw dust and the like are configured to be discharged to the field from the dust outlet 23 at the rear of the traveling machine body 1.

Further, as shown in FIGS. 1 to 3, the driver's cab 5 is provided with a control column 41 and a driver's seat 42 on which the operator sits. The control column 41 includes an accelerator lever 40 that adjusts the rotation speed of the engine 7, a round control handle 43 that changes the course of the traveling body 1 by the rotation operation of the operator, and a main body that switches the moving speed of the traveling body 1. A speed change lever 44, an auxiliary speed change lever 45, a cutting clutch lever 46 for driving or stopping the cutting unit 3, and a grain removal clutch lever 47 for driving or stopping the grain removal unit 9 are arranged. Further, a roof body 49 for awning is attached to the upper surface side of the front portion of the grain tank 6 via a sun visor support column 48, and the roof body 49 for awning covers the upper side of the driver's cab 5.

As shown in FIGS. 1 and 2, the left and right track frames 50 are arranged on the lower surface side of the traveling machine body 1. The track frame 50 includes a drive sprocket 51 that transmits the power of the engine 7 to the track 2, a tension roller 52 that maintains the tension of the track 2, and a plurality of track rollers 53 that hold the ground side of the track 2 in the ground state. An intermediate roller 54 for holding the non-grounded side of the track 2 is provided. The drive sprocket 51 supports the front side of the track 2, the tension roller 52 supports the rear side of the track 2, the track roller 53 supports the ground side of the track 2, and the intermediate roller 54 supports the non-ground side of the track 2. It is configured to let.

Next, the drive structure of the combine will be described with reference to FIGS. 4 to 8. As shown in FIGS. 4 and 7, a straight-moving hydraulic continuously variable transmission 64 having a hydraulic straight-moving pump 64a and a hydraulic straight-moving motor 64b is provided in the transmission case 63. The engine 7 is mounted on the upper right surface of the front part of the traveling machine body 1, and the mission case 63 is arranged on the front part of the traveling body 1 on the left side of the engine 7. The output shaft 65 protruding to the left from the engine 7 and the mission input shaft 66 protruding to the left from the mission case 63 are connected via the engine output belt 67, the engine output pulley 68, and the mission input pulley 69. There is. In addition, the working unit charge pump 59 and the cooling fan 149 for driving the lifting hydraulic cylinder 4 and the like are arranged in the engine 7, and the working unit charge pump 59 and the cooling fan 149 are driven by the engine 7.

Further, a steering swivel hydraulic continuously variable transmission 70 having a hydraulic swivel pump 70a and a hydraulic swivel motor 70b is provided in the mission case 63, and a straight-ahead hydraulic continuously variable transmission 64 and a swivel hydraulic type are provided via a mission input shaft 66. While transmitting the output of the engine 7 to the continuously variable transmission 70, the control handle 43, the main shift lever 44, and the auxiliary shift lever 45 output the straight-moving hydraulic stepless transmission 64 and the turning hydraulic stepless transmission 70. It is configured to control and drive the left and right foot belts 2 via a straight-ahead hydraulic continuously variable transmission 64 and a swivel-swing hydraulic continuously variable transmission 70 so as to travel in a field or the like. In the embodiment, straight-ahead and swivel hydraulic continuously variable transmissions 64 and 70 are arranged on the upper right side of the transmission case 63. The drive device of the present invention is composed of the straight-ahead and swivel hydraulic continuously variable transmissions 64 and 70 and the transmission case 63.

Further, as shown in FIGS. 1 to 6, a handling cylinder drive case 71 that pivotally supports the front end side of the handling cylinder shaft 20 is provided. The handling cylinder drive case 71 is arranged on the front side of the threshing unit 9. The handling cylinder input shaft 72 for driving the cutting unit 3 and the handling cylinder 21 is pivotally supported by the handling cylinder drive case 71. Further, a main counter shaft 76 is provided as a constant rotation shaft that penetrates to the left and right of the threshing unit 9. A working unit input pulley 83 is provided at the right end of the main counter shaft 76. The right end of the main counter shaft 76 is connected to the engine output pulley 68 on the output shaft 65 of the engine 7 via a threshing clutch 84 that also serves as a tension roller and a working unit drive belt 85.

In front of the handling cylinder 21, the handling cylinder input shaft 72 extended to the left and right of the traveling machine 1, the beater 18 arranged to the left and right of the traveling machine 1, and the cutting input shaft extending to the left and right of the traveling machine 1 89 is provided. As the handling cylinder input mechanism 90 for transmitting the driving force of the main counter shaft 76 to the handling cylinder input shaft 72, the handling cylinder drive pulleys 86 and 87 and the handling cylinder drive belt 88 are provided, and the driving force from the engine 7 is transmitted. A handling cylinder input mechanism 90 (handling cylinder drive pulleys 86 and 87 and a handling cylinder drive belt 88) is arranged at one end of the counter shaft 76 on the engine 7 side, and the handling cylinder 21 is driven to rotate constantly with a constant rotation output of the engine 7. It is configured as follows.

A beater drive mechanism and a cutting drive mechanism for transmitting the driving force of the main counter shaft 76 to the beater shaft 82 and the cutting input shaft 89 are provided on the other end side of the main counter shaft 76. Further, the sub counter shaft 104 is arranged between the beater shaft 82 and the main counter shaft 76, and the power relay belt 113 is wound around the power relay pulleys 105 and 106 provided on the main counter shaft 76 and the sub counter shaft 104. It constitutes a power relay mechanism that is turned and transmits power to the cutting drive mechanism.

The cutting drive belt 114 is wound around the cutting drive pulleys 107 and 108 provided on the sub-counter shaft 104 and the beater shaft 82, respectively, to form the beater drive mechanism. Then, the cutting drive belt 114 is stretched by the cutting clutch 109 that also serves as a tension roller, so that the rotational power transmitted from the engine 7 to the main counter shaft 76 is beaten via the power relay mechanism and the beater drive mechanism. It is input to the axis 82. Further, a cutting drive mechanism is configured so that the cutting drive force from the engine 7 is transmitted from the beater shaft 82 on which the beater 18 is pivotally supported to the cutting input shaft 89 via the cutting drive chain 115 and the sprockets 116 and 117. ing. As a result, the cutting unit 3 and the beater 18 are driven at a constant rotation with the constant rotation output of the engine 7.

The wall insert shaft 100, which is the rotation shaft of the wall insert 29 in the shape of a blower fan, has a hollow tube shape, and the main counter shaft 76 is interpolated in the hollow portion of the wall insert shaft 100. That is, the main counter shaft 76 and the wall insert shaft 100 have a double shaft structure, and the main counter shaft 76 and the wall insert shaft 100 are pivotally supported so as to be rotatable relative to each other. Further, the wall insert drive belt 103 is wound around the wall insert drive pulleys 101 and 102 provided on the sub-counter shaft 104 and the wall insert shaft 100, respectively, to form the wall insert drive mechanism. Therefore, the rotational power transmitted from the engine 7 to the main counter shaft 76 is input to the beater shaft 82 via the power relay mechanism and the wall insert drive mechanism, and the wall insert 29 is driven by the constant rotation output of the engine 7.

Further, in the machine housing of the threshing machine 9, the cutting support frame 36 is installed on the upper surface side of the front portion of the threshing machine housing column 34 on the upper surface side of the traveling machine 1. The cutting bearing body 37 is attached to the front right side of the cutting support frame body 36, and the forward / reverse switching case 121 described later is attached to the front left side of the cutting support frame body 36. Then, via the cutting bearing body 37 and the forward / reverse switching case 121, the cutting input shaft 89 is rotatably supported on the front side of the cutting support frame body 36 in the left-right direction of the traveling machine body 1, and the cutting support frame body 36 is supported. A beater shaft 82 (beater 18) facing left and right is rotatably supported inside the beater bearing body 38. Further, the handling cylinder drive case 71 is attached to the upper surface side of the cutting support frame body 36, and the handling cylinder input shaft 72 is pivotally supported by the handling cylinder drive case 71.

On the other hand, a left-right cutting input shaft 89 for driving the supply conveyor 17 in the feeder house 11 is provided. The cutting driving force transmitted from the engine 7 to one end on the engine 7 side of the main counter shaft 76 is transmitted from the other end of the main counter shaft 76 on the opposite side of the engine 7 to the forward / reverse transmission of the cutting forward / reverse switching case 121. It is transmitted to the shaft 122. The cutting input shaft 89 is driven via the forward rotation bevel gear 124 or the reverse rotation bevel gear 125 of the cutting forward / reverse switching case 121.

Further, a left-right direction handling cylinder input shaft 72 is provided on the front side of the threshing portion 9, and the driving force transmitted from the engine 7 to one end on the engine 7 side of the main counter shaft 76 is one end on the engine 7 side of the handling cylinder input shaft 72. It is transmitted to the department. Further, the handling cylinder input shaft 72 provided on the front side of the threshing unit 9 is arranged in the left-right direction of the traveling machine body 1, while the handling cylinder 21 is pivotally supported by the handling cylinder shaft 20 arranged in the front-rear direction of the traveling machine body 1. The front end side of the handling cylinder shaft 20 is connected to the left and right other ends of the handling cylinder input shaft 72 opposite to the engine 7 via a bevel gear mechanism 75. The driving force of the engine 7 is transmitted to the grain sorting mechanism 10 or the cutting section 3 that sorts the grains after threshing from the left and right other ends of the main counter shaft 76 opposite to the engine 7. ..

That is, the right end of the handling cylinder input shaft 72 is connected to the right end of the main counter shaft 76 on the side closer to the engine 7 via the handling cylinder drive pulleys 86 and 87 and the handling cylinder drive belt 88. The front end side of the handling cylinder shaft 20 is connected to the left end portion of the handling cylinder input shaft 72 extending in the left-right direction via the bevel gear mechanism 75. The power of the engine 7 is transmitted from the right end of the main counter shaft 76 to the front end side of the handling cylinder shaft 20 via the handling cylinder input shaft 72, and the handling cylinder 21 is rotationally driven in one direction. On the other hand, the driving force of the engine 7 is transmitted from the left end portion of the main counter shaft 76 to the grain sorting mechanism 10 arranged below the threshing portion 9.

Further, the left end of the first conveyor shaft 77 of the first conveyor mechanism 30 and the left end of the second conveyor shaft 78 of the second conveyor mechanism 31 are connected to the left end of the main counter shaft 76 via the conveyor drive belt 111. The ends are connected. The left end of the second conveyor shaft 78 is connected to the left end of the crank-shaped swing drive shaft 79 that pivotally supports the rear portion of the swing sorting board 26 via the swing sorting belt 112. That is, the threshing clutch 84 is turned on and off by the operator's operation of the threshing clutch lever 47. Each part of the grain sorting mechanism 10 and the handling cylinder 21 are driven by the engagement operation of the threshing clutch 84.

The fried grain conveyor 32 is driven via the first conveyor shaft 77, and the first sorted grain of the first conveyor mechanism 30 is collected in the grain tank 6. Further, the second reduction conveyor 33 is driven via the second conveyor shaft 78, and the second sorting grain (second product) mixed with the straw dust of the second conveyor mechanism 31 is on the upper surface side of the rocking sorting board 26. Returned to. Further, in a structure in which a spreader (not shown) for scattering straw dust is provided at the dust discharge port 23, the spreader drive pulley (not shown) and the spreader drive belt (not shown) are provided on the spreader on the left side of the main counter shaft 76. Connect the ends.

A cutting input shaft 89 is provided as a conveyor input shaft that supports the feed end side of the supply conveyor 17. The header drive shaft 91 is rotatably supported on the back side of the right side of the grain header 12. The left end of the forward / reverse transmission shaft 122 is connected to the left end of the beater shaft 82 via the cutting drive chain 115 and the sprockets 116 and 117, and the cutting input shaft 89 is transmitted forward / reverse via the forward / reverse switching case 121. It is connected to the shaft 122. Further, the right end portion of the cutting input shaft 89 is connected to the left end portion of the header drive shaft 91 extending in the left-right direction via the header drive chain 118 and the sprockets 119 and 120. A scraping shaft 93 that pivotally supports the scraping auger 13 is provided. An intermediate portion of the header drive shaft 91 is connected to the right side portion of the scraping shaft 93 via a scraping drive chain 92.

Further, a reel shaft 94 that pivotally supports the scraping reel 14 is provided. The right end of the suction shaft 93 is connected to the right end of the reel shaft 94 via an intermediate shaft 95 and reel drive chains 96 and 97. A cutting blade 15 is connected to the right end of the header drive shaft 91 via a cutting blade drive crank mechanism 98. The supply conveyor 17, the scraping auger 13, the scraping reel 14, and the cutting blade 15 are driven and controlled by the on / off operation of the cutting clutch 109 so that the tip side of the uncut grain culm in the field is continuously cut. It is configured in.

A forward rotation bevel gear 124 integrally formed with the forward / reverse rotation transmission shaft 122, a reverse rotation bevel gear 125 rotatably supported by the cutting input shaft 89, and an intermediate bevel gear 126 for connecting the reverse rotation bevel gear 125 to the forward rotation bevel gear 124. , It is installed internally in the forward / reverse switching case 121. The intermediate bevel gear 126 is always meshed with the forward rotation bevel gear 124 and the reverse rotation bevel gear 125. On the other hand, the slider 127 is slidably supported on the cutting input shaft 89 by the spline engaging shaft. The slider 127 is disengaged and engageable with the forward rotation bevel gear 124 via the claw clutch-shaped forward rotation clutch 128, and the slider 127 is engaged with the reverse rotation bevel gear 125 via the claw clutch-shaped reverse rotation clutch 129. It is configured so that it can be disengaged and engaged.

Further, a forward / reverse switching shaft 123 for sliding the slider 127 is provided, a forward / reverse switching arm 130 is provided on the forward / reverse switching shaft 123, and the forward / reverse switching arm 130 is operated by operating the forward / reverse switching lever (forward / reverse operating tool). By swinging, the forward / reverse switching shaft 123 is rotated, the slider 127 is brought into contact with the forward / reverse bevel gear 124 or the reverse bevel gear 125, and the forward / reverse bevel gear 124 or the reverse is reversed via the forward clutch 128 or the reverse clutch 129. The slider 127 is selectively engaged with the bevel gear 125, and the cutting input shaft 89 is connected to the forward / reverse transmission shaft 122 in the forward rotation or reverse rotation.

The structure includes a forward / reverse switching case 121 as a forward / reverse switching mechanism for driving the supply conveyor 17 in the forward or reverse direction, and the supply conveyor 17 is connected to the beater shaft 82 via the forward / reverse switching case 121. Therefore, the supply conveyor 17 of the feeder house 11 can be reversed by the reverse switching operation of the forward / reverse switching case 121, and the clogged straw in the feeder house 11 can be quickly removed.

The right end of the auger drive shaft 158 is connected to the output shaft 65 of the engine 7 via a tension pulley-shaped auger clutch 156 and an auger drive belt 157. The lateral feed auger 160 front end side of the bottom of the grain tank 6 is connected to the left end of the auger drive shaft 158 via the bevel gear mechanism 159. The vertical feed auger 162 of the grain discharge conveyor 8 is connected to the rear end side of the horizontal feed auger 160 via the bevel gear mechanism 161 and the grain of the grain discharge conveyor 8 is connected to the upper end side of the vertical feed auger 162 via the bevel gear mechanism 163. The grain discharge auger 164 is connected. In addition, a grain discharge lever 155 for turning on and off the auger clutch 156 is provided. A grain discharge lever 155 is attached to the rear of the driver's seat 42 and to the front of the grain tank 6, so that the operator can operate the grain discharge lever 155 from the driver's seat 42 side.

Next, the power transmission structure of the mission case 63 and the like will be described with reference to FIGS. 4 and 7. As shown in FIGS. 4 and 7, the transmission case 63 includes a pair of linearly variable transmissions 64a and a pair of linearly variable transmissions 64b for linearly variable transmission (main speed change) and a pair of swivel pumps 70a. And a hydraulic continuously variable transmission 70 for turning having a turning motor 70b is provided. The transmission shafts 66 of the mission case 63 are gear-connected to the pump shafts 258 and 259 of the straight-ahead pump 64a and the swivel pump 70a, respectively. The engine output belt 67 is hung around the mission input pulley 69 on the mission input shaft 66. The output of the engine 7 is transmitted to the transmission input pulley 69 via the engine output belt 67 to drive the straight-ahead pump 64a and the swivel pump 70a.

The driving force output from the output shaft 65 of the engine 7 is transmitted to the pump shaft 258 of the linear pump 64a and the pump shaft 259 of the swivel pump 70a, respectively, via the engine output belt 67 and the transmission input shaft 66. In the straight-ahead hydraulic continuously variable transmission 64, hydraulic oil is appropriately sent from the straight-ahead pump 64a toward the straight-ahead motor 64b by the power transmitted to the pump shaft 258. Similarly, in the swivel hydraulic continuously variable transmission 70, hydraulic oil is appropriately sent from the swivel pump 70a toward the swivel motor 70b by the power transmitted to the pump shaft 259.

The mission input shaft 66 projects from the upper left side surface of the mission case 63 toward the feeder house 11, and the mission input pulley 69 is pivotally attached to the protruding end (left end) of the mission input shaft 66 so as not to rotate relative to each other. The transmission input shaft 66 is rotatably supported by bearings fixed to the transmission case 63, and a power distribution gear 262 is fitted in the middle of the transmission input shaft 66 so as to be non-relatively rotatable. The pump shaft 258 of the straight pump 64a and the pump shaft 259 of the swivel pump 70a are respectively arranged in front of and behind the mission input shaft 66 in a plan view and below the mission input shaft 66 in a side view.

A straight-ahead input gear 263 that meshes with a power distribution gear 262 fixed to the transmission input shaft 66 rotates relative to the protruding end (left end) of the pump shaft 258 that protrudes from the continuously variable transmission case 323 toward the inside of the transmission case 63. It is fitted impossible. Similarly, at the protruding end (left end) of the pump shaft 259 projecting from the continuously variable transmission case 323 toward the inside of the transmission case 63, the turning input gear 264 meshes with the power distribution gear 262 fixed to the transmission input shaft 66. Is fitted so that it cannot rotate relative to each other.

When the driving force output from the output shaft 65 of the engine 7 is transmitted to the mission input pulley 69, the mission input shaft 66 and the power distribution gear 262 rotate together with the mission input pulley 69, and the driving force is rotated via the straight input gear 263. While rotating the pump shaft 258 of the linear pump 64a, the pump shaft 259 of the swivel pump 70a is rotated via the swivel input gear 264. That is, by engaging the power distribution gear 262 of the transmission input shaft 66 arranged between the pump shafts 258 and 259 with the straight input gear 263 and the turning input gear 264 of the pump shafts 258 and 259, respectively, from the engine 7. The driving force can be efficiently transmitted to each of the straight-ahead hydraulic continuously variable transmission 64 and the turning hydraulic continuously variable transmission 70.

A transmission charge pump 151 for supplying hydraulic oil to the hydraulic pumps 64a and 70a and the hydraulic motors 64b and 70b is attached to the pump shaft 259. The straight-ahead hydraulic continuously variable transmission 64 changes and adjusts the inclination angle of the swash plate in the straight-ahead pump 64a according to the amount of operation of the main speed change lever 44 and the control handle 43 arranged in the control column 41, and is a straight-ahead motor. By changing the discharge direction and the discharge amount of the hydraulic oil to the 64b, the rotation direction and the rotation speed of the straight-moving motor shaft 260 protruding from the straight-moving motor 64b are arbitrarily adjusted.

The rotational power of the linear motor shaft 260 is transmitted from the linear transmission gear mechanism 250 to the auxiliary transmission gear mechanism 251. The auxiliary transmission gear mechanism 251 includes an auxiliary transmission low speed gear 254, an auxiliary transmission medium speed gear 255, and an auxiliary transmission high speed gear 256 that are switched by the auxiliary transmission shifters 252 and 253. By operating the auxiliary transmission lever 45 arranged on the control column 41, the output rotation speed of the straight-ahead motor shaft 260 is configured to be selectively switched to three stages of low speed, medium speed, or high speed. .. It should be noted that there is a neutral position (a position where the output of the auxiliary transmission becomes zero) between the low speed, the medium speed, and the high speed of the auxiliary transmission.

A drum-type parking brake 266 is provided on the parking brake shaft 265 (secondary transmission output shaft) provided on the output side of the auxiliary transmission gear mechanism 251. The rotational power from the auxiliary transmission gear mechanism 251 is transmitted from the auxiliary transmission output gear 267 fixed to the parking brake shaft 265 to the left and right differential mechanisms 257. The left and right differential mechanisms 257 are each provided with a planetary gear mechanism 268. Further, a straight-ahead pulse generating rotary wheel 292 is provided on the parking brake shaft 265, and a straight-ahead vehicle speed sensor (not shown) is configured to detect the number of rotations of the straight-ahead output (straight-ahead vehicle speed = shift output of the auxiliary shift output gear 267). doing.

The left and right planetary gear mechanisms 268 can rotate one sun gear 271, a plurality of planet gears 272 that mesh with the sun gear 271, a ring gear 273 that meshes with the planet gear 272, and a plurality of planet gears 272 on the same circumference. Each includes a carrier 274 to be arranged. The carriers 274 of the left and right planetary gear mechanisms 268 are arranged so as to face each other on the same axis at appropriate intervals. The center gear 276 is fixed to the sun gear shaft 275 provided with the left and right sun gears 271.

The left and right ring gears 273 are concentrically arranged on the sun gear shaft 275 in a state where the internal teeth on the inner peripheral surface thereof are meshed with the plurality of planetary gears 272. Further, the outer teeth on the outer peripheral surfaces of the left and right ring gears 273 are connected to the steering output shaft 285 via intermediate gears 287 and 288 for left and right turning output, which will be described later. Each ring gear 273 is rotatably supported by left and right forced differential output shafts 277 protruding left and right outward from the outer surface of the carrier 274. The left and right axles 278 are connected to the left and right forced differential output shafts 277 via final gears 278a and 278b. Left and right drive sprockets 51 are attached to the left and right axles 278. Therefore, the rotational power transmitted from the auxiliary transmission gear mechanism 251 to the left and right planetary gear mechanisms 268 is transmitted from the left and right axles 278 to each drive sprocket 51 at the same rotation speed in the same direction, and the left and right crests 2 are in the same direction. Drives at the same number of rotations to move the traveling aircraft 1 straight (forward, backward).

The swivel hydraulic continuously variable transmission 70 changes and adjusts the tilt angle of the swash plate in the swivel pump 70a according to the amount of rotation of the main speed change lever 44 and the control handle 43 arranged on the control column 41. By changing the discharge direction and the discharge amount of the hydraulic oil to the swivel motor 70b, the rotation direction and the rotation speed of the swivel motor shaft 261 protruding from the swivel motor 70b are arbitrarily adjusted. Further, a turning pulse generating rotating wheel 294 is provided on the steering counter shaft 280, which will be described later, and a turning rotation sensor (turning vehicle speed sensor) (not shown) is used to rotate the steering output of the turning motor 70b (turning vehicle speed). Is configured to detect.

Further, in the transmission case 63, a wet multi-plate swivel brake 279 (steering brake) provided on the swivel motor shaft 261 (steering input shaft) and a reduction gear 281 on the swivel motor shaft 261 are interposed. Left input for connecting the steering counter shaft 280 to be connected, the steering output shaft 285 to be connected to the steering counter shaft 280 via the reduction gear 286, and the steering output shaft 285 to be connected to the left ring gear 273 via the reverse gear 284. A gear mechanism 282 and a right input gear mechanism 283 that connects the steering output shaft 285 to the right ring gear 273 are provided. The rotational power of the swivel motor shaft 261 is transmitted to the steering counter shaft 280. The rotational power transmitted to the steering counter shaft 280 is transmitted to the left ring gear 273 as reverse rotation power via the left intermediate gear 287 and the reverse gear 284 on the steering output shaft 285 in the left input gear mechanism 282. On the other hand, it is transmitted to the right ring gear 273 as forward rotation power via the right intermediate gear 288 on the steering output shaft 285 in the right input gear mechanism 283.

When the auxiliary transmission gear mechanism 251 is set to neutral, power transmission from the straight motor 64b to the left and right planetary gear mechanisms 268 is blocked. Power is transmitted from the auxiliary transmission gear mechanism 251 to the left and right planetary gear mechanisms 268 from the straight motor 64b via the auxiliary transmission low speed gear 254, the auxiliary transmission medium speed gear 255, or the auxiliary transmission high speed gear 256 at the time of auxiliary transmission output other than neutral. .. On the other hand, when the output of the swivel pump 70a is set to the neutral state and the swivel brake 279 is turned on, the power transmission from the swivel motor 70b to the left and right planetary gear mechanisms 268 is blocked. When the output of the swivel pump 70a is set to a state other than neutral and the swivel brake 279 is turned off, the rotational power of the swivel motor 70b is transmitted to the left ring gear 273 via the left input gear mechanism 282 and the reverse gear 284. On the other hand, it is transmitted to the right ring gear 273 via the right input gear mechanism 283.

As a result, at the time of forward rotation (reverse rotation) of the swivel motor 70b, the left ring gear 273 reverses (forward rotation) and the right ring gear 273 rotates forward (reverse) at the same rotation speed in opposite directions. That is, the shift output from each of the motor shafts 260 and 261 is transmitted to the drive sprockets 51 of the left and right crawler belts 2 via the auxiliary transmission gear mechanism 251 or the differential mechanism 257, respectively, and the vehicle speed (traveling) of the traveling machine 1 is transmitted. Speed) and direction of travel are determined.

That is, when the linear motor 64b is driven in a state where the swivel motor 70b is stopped and the left and right ring gears 273 are stationary and fixed, the rotational output from the linear motor shaft 260 is transmitted to the left and right sun gears 271 at the same number of rotations on the left and right, and the planet. The left and right foot belts 2 are driven at the same rotation speed in the same direction via the gear 272 and the carrier 274, and the traveling machine body 1 travels straight.

On the contrary, when the swivel motor 70b is driven while the straight motor 64b is stopped and the left and right sun gears 271 are statically fixed, the left ring gear 273 rotates in the forward direction (reverse) by the rotational power from the swivel motor shaft 261. Rotate), and the right ring gear 273 rotates in the reverse direction (forward rotation). As a result, one of the drive sprockets 51 of the left and right crawler belts 2 rotates forward and the other rotates backward, and the traveling machine body 1 is changed in direction (reliable turn spin turn) on the spot.

Further, by driving the left and right ring gears 273 by the swivel motor 70b while driving the left and right sun gears 271 by the straight-ahead motor 64b, a difference in speed is generated between the left and right crawler belts 2, and the traveling machine body 1 makes a turn while moving forward or backward. Turn left or right (U-turn) with a turning radius larger than the radius. The turning radius at this time is determined according to the speed difference between the left and right tracks 2. The running driving force of the engine 7 is constantly transmitted to the left and right crawler belts 2 and the engine 7 turns to the left or right.

Next, the working system hydraulic circuit 180 and the traveling system hydraulic circuit 200 in the conventional combine of the present embodiment will be described with reference to FIGS. 8 to 11. As shown in FIGS. 8 to 11, the work system hydraulic circuit 180 includes a cutting lifting hydraulic cylinder 4 and left and right reel lifting hydraulic cylinders 27L and 27R for raising and lowering the suction reel 14 as hydraulic actuators. The auger lifting hydraulic cylinder 55 that supports the grain discharge auger 164 so that it can be raised and lowered, the left and right machine body raising and lowering hydraulic cylinders 56L and 56R that raise and lower the traveling machine 1, the hydraulic oil tank 57 that stores the hydraulic oil, and the hydraulic oil. It includes a working unit charge pump 59 connected to the tank 57 via a strainer 58, and hydraulic valves 60A to 60E for switching the flow of hydraulic oil. The hydraulic valves 60A to 60E are incorporated in the hydraulic valve unit 60 mounted on the traveling machine body 1.

The work unit charge pump 59 is hydraulically connected to the cutting lifting hydraulic cylinder 4 via the cutting raising / lowering hydraulic valve 60A. By tilting the cutting posture lever (not shown) in the driving operation unit (cab) 5 in the front-rear direction, the hydraulic cylinder 4 for raising and lowering the cutting is operated, and the operator raises the cutting unit 3 to an arbitrary height (for example, the cutting work height). Or it is configured to move up and down to non-working height, etc.). On the other hand, the work unit charge pump 59 is hydraulically connected to the reel elevating hydraulic cylinders 27L and 27R via the reel elevating hydraulic valve 60B. By tilting the cutting posture lever (not shown) in the left-right direction, the reel lifting hydraulic cylinders 27L and 27R are operated, and the operator moves the suction reel 14 up and down to an arbitrary height to move the uncut grains in the field. It is configured to mow the culm.

The work unit charge pump 59 is hydraulically connected to the auger lifting hydraulic cylinder 55 via the auger lifting hydraulic valve 60C. By tilting the grain discharge lever 155 in the operation unit (cab) 5 in the front-rear direction, the hydraulic cylinder 55 for raising and lowering the auger is operated, and the operator operates the paddy throwing port of the grain discharge auger 164 in the grain discharge conveyor 8. To move up and down to any height. The electric motor 165 rotates the grain discharge auger 164 in the horizontal direction together with the vertical feed auger 162 and the bevel gear mechanism 163 to move the paddy throwing port in the horizontal direction. That is, the paddy throwing port is located above the truck bed or container, and the grains in the grain tank 6 are discharged into the truck bed or container.

The hydraulic oil tank 57 and the work unit charge pump 59 are hydraulically connected to the left machine body lifting hydraulic cylinder 56L via the left machine body raising / lowering hydraulic valve 60D. On the other hand, the hydraulic oil tank 57 and the work unit charge pump 59 are hydraulically connected to the right machine body lifting hydraulic cylinder 56R via the right machine body raising / lowering hydraulic valve 60E. By operating the left and right hydraulic cylinders 56L and 56R for raising and lowering the machine body independently of each other, the left and right sides of the traveling machine body 1 are raised and lowered independently.

Therefore, when the hydraulic cylinders 56L and 56R for raising and lowering the aircraft on both the left and right sides are operated at the same time and the left and right track frames 50 and 50 are lowered with respect to the traveling aircraft 1 at the same time, the traveling aircraft 1 has crawler belts 2 and 2 on both the left and right sides. The relative height (vehicle height) of the traveling aircraft 1 with respect to the track 2 and 2 ground contact portions becomes higher as the traveling aircraft 1 moves upward (ascends). On the contrary, when the left and right track frames 50 and 50 are raised with respect to the traveling body 1 at the same time, the traveling body 1 approaches (descends) the tracks 2 and 2 on both the left and right sides and descends, and the track 2 of the traveling body 1 approaches. , 2 The relative height (vehicle height) with respect to the ground contact part becomes low.

Then, the left machine body lifting hydraulic cylinder 56L is operated to lower the left track frame 50 with respect to the traveling machine body 1, or the right machine body raising / lowering hydraulic cylinder 56R is operated to raise the right track frame 50 with respect to the traveling machine body 1. And (or even if both of these operations are executed at the same time), the traveling aircraft 1 tilts downward to the right. On the contrary, the right track frame 50 is lowered with respect to the traveling machine 1 by operating the right hydraulic cylinder 56R for raising and lowering the right body, or the right track frame 50 is lowered with respect to the traveling machine 1 by operating the hydraulic cylinder 56L for raising and lowering the left body. When raised (or even if both of these operations are performed at the same time), the traveling aircraft 1 tilts downward to the left.

The hydraulic oil tank 57, the work unit charge pump 59, and the hydraulic valve unit 60 are mounted on the traveling machine body 1, and are connected to each other via hydraulic pipes 181 to 183. On the traveling machine body 1, the hydraulic oil tank 57 is installed on the front left side, while the work unit charge pump 59 is fixed to the front surface of the engine 7 mounted on the front right side, and the strainer 58 built in the hydraulic oil tank 57 The working unit charge pump 59 is connected by a hydraulic pipe 181. Further, the hydraulic valve unit 60 is arranged at a position behind the engine 7 on the traveling machine body 1, and the discharge side of the work unit charge pump 59 is connected to the hydraulic valve unit 60 via the hydraulic pipe 182. Further, the hydraulic valve unit 60 is connected to the hydraulic oil tank 57 via a hydraulic pipe 183 that serves as a hydraulic oil return pipe.

The hydraulic oil tank 57 is installed on the traveling machine body 1 at a space position surrounded by the feeder house 11 and the beater 18, and the engine 7 and the hydraulic oil tank 57 are arranged side by side in front of the traveling machine body 1. There is. That is, the hydraulic oil tank 57 is arranged in the space surrounded by the feeder house 11 and the machine housing of the threshing section 9, and dust from the cutting section 3 can be suppressed from accumulating in the hydraulic oil tank 57. Contamination of hydraulic oil due to intrusion of dust from the fuel filler port 184 and the like can also be prevented. Further, since the cooling air from the engine 7 flows into the installation space of the hydraulic oil tank 57, it is possible to suppress an increase in the hydraulic oil temperature without providing an oil cooler on the work system hydraulic circuit 180, and each hydraulic member can be used. Can be driven properly.

The hydraulic oil tank 57 has an oil filler port 184 projecting toward the left side (outside the machine) on the left side (outside the machine), and has a strainer 58 that can be inserted and removed from the left side. Therefore, the refueling port 184 and the strainer 58 can be easily accessed by removing the threshing cover 185 provided on the left side (outside the machine) of the threshing unit 9. Therefore, the refueling work of the hydraulic oil tank 57 and the replacement work of the oil filter in the strainer 58 can be facilitated, and the maintainability of the work system hydraulic circuit 180 can be improved.

Further, the hydraulic pipes 181, 183 connected to the hydraulic oil tank 57 are piped so as to extend in front of the hydraulic oil tank 57 and the engine 7 to the left and right, and the hydraulic pipe 182 is arranged in front of the engine 7 as a work unit charge pump 59. And the strainer 58 are in communication. That is, the hydraulic pipes 181, 183 bypass the front of the engine 7 and extend toward the hydraulic oil tank 57 along the output shaft 65 of the engine 7. Further, the hydraulic pipes 182 and 183 extend rearward through the lower part of the cooling fan 149 provided on the right side of the engine 7 and are connected to the hydraulic valve unit 60. Therefore, the hydraulic pipes 181 to 183 are arranged so that the length of the pipeline is shortened at a position where they are not easily affected by the radiant heat from the engine 7, and the temperature of the hydraulic oil flowing through the hydraulic pipes is suppressed from rising. it can.

As shown in FIGS. 7, 10 and 11, the traveling system hydraulic circuit 200 includes a straight pump 64a, a straight motor 64b, a swivel pump 70a, a swivel motor 70b, a transmission charge pump 151, an oil filter 152, and an oil cooler 153. I have. The linear pump 64a and the linear motor 64b in the linear hydraulic continuously variable transmission 64 are connected in a closed loop by a linear oil closing passage 201. On the other hand, the swivel pump 70a and the swivel motor 70b in the swivel hydraulic continuously variable transmission 70 are connected in a closed loop by a swivel closed oil passage 202. By driving the straight-ahead pump 64a and the swivel pump 70a with the rotational power of the engine 7 and controlling the angle of the slant plate of the straight-ahead pump 64a and the swivel pump 70a, the discharge direction and discharge of hydraulic oil to the straight-ahead motor 64b and the swivel motor 70b The amount is changed, and the straight-ahead motor 64b and the swivel motor 70b operate in the forward and reverse directions.

The traveling system hydraulic circuit 200 includes a straight-ahead valve 203 that switches and operates in response to a manual operation of the main speed change lever 44, and a straight-ahead cylinder 204 that is connected to the transmission charge pump 151 via the straight-ahead valve 203. When the linear valve 203 is switched and operated, the linear cylinder 204 operates to change the swash plate angle of the linear pump 64a, and the linear motor shaft 260 rotation speed of the linear motor 64b is steplessly changed or reversed. The action is performed. The traveling system hydraulic circuit 200 also includes a hydraulic servo mechanism 205 for straight-ahead shifting. The hydraulic servo mechanism 205 executes a feedback operation in which the straight valve 203 returns to the neutral position by controlling the swash plate angle of the straight pump 64a, and changes the swash plate angle of the straight pump 64a in proportion to the manual operation amount of the main speed change lever 44. The 260 rotation speed of the straight motor shaft of the straight motor 60b is changed.

The traveling system hydraulic circuit 200 includes a swivel valve 206 that switches and operates in response to a manual operation of the control handle 43, and a swivel cylinder 207 that is connected to the transmission charge pump 151 via the swivel valve 206. When the swivel valve 206 is switched and operated, the swivel cylinder 207 operates to change the angle of the tilt plate of the swivel pump 70a, and the rotation speed of the swivel motor shaft 261 of the swivel motor 70b is steplessly changed or reversed. The left-right turning operation is executed, and the traveling machine 1 changes the traveling direction to the left and right to change the direction or correct the course at the field headland. The traveling system hydraulic circuit 200 also includes a hydraulic servo mechanism 208 for turning and shifting. The hydraulic servo mechanism 208 performs a feedback operation in which the swash valve 206 returns to neutral by controlling the swash plate angle of the swash pump 70a, and changes the swash plate angle of the swash pump 70a in proportion to the amount of manual operation of the control handle 43. The swash motor shaft 261 rotation speed of the swash motor 70b is changed.

As shown in FIG. 11, charge branch oil passages 219 (details will be described later) are connected to all the oil passages 201a, 201b, 202a, 202b of both closed oil passages 201, 202. A check valve 211 for the straight first oil passage 201a is provided between the charge branch oil passage 219 and the straight first oil passage 201a. A check valve 211 for the straight second oil passage 201b is provided between the charge branch oil passage 219 and the straight second oil passage 201b. Therefore, the straight-ahead closed oil passage 201 is provided with two check valves 211. Further, a check valve 212 for the turning first oil passage 202a is provided between the charge branch oil passage 219 and the turning first oil passage 202a. A check valve 212 for the swivel second oil passage 202b is provided between the charge branch oil passage 219 and the swivel second oil passage 202b. Therefore, the swivel closed passage 202 also includes two check valves 212.

A straight bypass oil passage 213 is connected to the straight first oil passage 201a and the straight second oil passage 201b. A straight-ahead bypass oil passage 213 is provided with a straight-ahead bidirectional relief valve 215. A swivel bypass oil passage 214 is connected to the swivel first oil passage 202a and the swivel second oil passage 202b. The swivel bypass oil passage 214 is provided with a swivel side bidirectional relief valve 216. Therefore, each of the closed oil passages 201 and 202 is provided with one bidirectional relief valve 215 and 216.

The suction side of the transmission charge pump 151 is connected to the strainer 217 in the transmission case 63 via the hydraulic pipe 221. A charge introduction oil passage 218 is connected to the discharge side of the transmission charge pump 151 via a hydraulic pipe 222, and an oil filter 152 is installed in the middle of the hydraulic pipe 222. A charge branch oil passage 219 connected to both closed oil passages 201 and 202 is connected to the downstream side of the charge introduction oil passage 218. Therefore, while the engine 7 is being driven, the hydraulic oil from the transmission charge pump 151 is constantly replenished in both the closed oil passages 201 and 202.

Further, the charge branch oil passage 219 is connected to the straight cylinder 204 via the straight valve 203 and is connected to the swivel cylinder 207 via the swivel valve 206. Further, the charge branch oil passage 219 is connected to the mission case 63 via the surplus relief valve 220 and the hydraulic pipe 223, and an oil cooler 153 is installed in the middle of the hydraulic pipe 223. Therefore, when the excess hydraulic oil from the transmission charge pump 151 is returned to the transmission case 63 via the surplus relief valve 220, it is cooled by the oil cooler 153.

Further, the hydraulic pipe 223 is connected to a bypass pipe 224 that bypasses the feed pipe and the return pipe, and the bypass pipe 224 is fixed above the continuously variable transmission case 323 on the side of the mission case 63. By arranging the hydraulic pipe 223 above the continuously variable transmission case 323, when the hydraulic oil temperature is low, such as when the engine 7 is started, the hydraulic oil can be circulated without being sent to the oil cooler 153. Therefore, even when the hydraulic oil temperature is low and the hydraulic oil has a high viscosity, the hydraulic oil can be smoothly circulated in the traveling system hydraulic circuit 200, and the hydraulic oil can be smoothly circulated in the transmission case 63 and the continuously variable transmission case 323. Lubricate each mechanism of.

Next, the engine room 146 in which the engine 7 is installed will be described with reference to FIG. 8 and the like. As shown in FIG. 8 and the like, a pair of left and right engine room columns 147 are erected on the rear side of the driver's cab 5 on the upper surface of the traveling machine body 1, and a back plate body 148 is stretched between the left and right engine room columns 147 for operation. It covers the rear of the engine room 146 below the seat 42. Further, a box-shaped wind tunnel case 170 is erected on a right engine room column 147 provided at the right end of the driver's cab 5 in the traveling machine body 1 via an opening / closing fulcrum shaft 171. A dust net is installed in the opening on the right side of the wind tunnel case 170 on the outside of the machine, and the presence of the dust net prevents straw dust and the like from entering the inside of the wind tunnel case 170 and the engine room 146.

A water cooling radiator 154 is erected inside the wind tunnel case 170 on the upper surface side of the traveling machine body 1, and the radiator 154 is confronted with the cooling fan 149 of the engine 7. A shroud 150 is installed so as to cover the entire ventilation range of the radiator 154, and the cooling fan 149 is arranged in the opening formed in the shroud 150. Further, an oil cooler 153 is installed in the wind tunnel case 170. By rotating the cooling fan 149, outside air (cooling air) is taken into the wind tunnel case 170 from the outside opening on the right side of the wind tunnel case 170, and dust-removed cooling air is taken into the engine room 146 from the inside opening on the left side of the wind tunnel case 170. Send to. As a result, the oil cooler 153, the radiator 154, the engine 7, and the like are cooled by the cooling air flowing into the engine room 146.

Next, the driving operation structure of the steering wheel 43 and the like will be described with reference to FIGS. 8, 10, 12 to 17. As shown in FIGS. 8, 10, 12 to 17, a step frame 311 is provided which constitutes a footrest flat portion for operator boarding in the driver's cab 5. A plurality of support leg frames 312 are erected on the upper surface side of the traveling machine body 1, and a step frame 311 is erected on the upper end side of the support leg frame 312. The boarding / alighting step 313 is fixed to the side surface of the support leg frame 312 on the outer side of the right side of the step frame 311, and the oil filter 152 is attached to the front end of the step frame 311 on the upper surface of the traveling machine body 1.

It also includes a steering case 318 having a swivel input shaft 316 and a main shift input shaft 317. Both ends of the case support horizontal frame 319 are connected between the left and right support leg frames 312 on the lower surface side of the front portion of the step frame 311, and the steering case 318 is detachably fastened and fixed to the substantially horizontal case support horizontal frame 319. The turning input shaft 316 is projected upward from the upper surface of the steering case 318, the turning input shaft 316 is connected to the steering handle 43 via the steering shaft 321 and the turning input shaft 316 is connected from the left side surface to the left side of the steering case 318. The main shift input shaft 317 is projected, and the main shift input shaft 317 is connected to the main shift lever 44 via the main shift operation rod 322.

As can be seen from the above description, the driver's cab 5 (control unit) on the step frame 311 provided on the upper end side of the support leg frame 312 group has a main speed change lever 44 which is a straight-ahead operation tool for straight-ahead operation and a main speed change lever 44 for turning operation. The steering handle 43, which is a turning operation tool of the above, is arranged. A case support horizontal frame 319 is bridged and attached between the left and right support leg frames 312 on the lower front side of the step frame 311. A steering case 318 that interlocks and connects the main shift lever 44, the steering handle 43, and the drive device (continuously variable transmission case 323 and the transmission case 63) is attached to the case support horizontal frame 319. There are two case support horizontal frames 319 in the front and rear with the steering case 318 in between. The steering case 318 is supported by two front and rear case support horizontal frames 319.

Further, on the left side of the steering case 318 in the front portion of the traveling machine body 1, an oil filter 152 fixed to the step frame 311 at the front end position is arranged. The oil filter 152 is fixed to a portion protruding to the left from the left support leg frame 312 in the front portion of the step frame 311 so as to be arranged in front of the continuously variable transmission case 323. That is, the oil filter 152 is arranged in front of the continuously variable transmission case 323 fixed to the right side of the mission case 63 by being fixed to the left side of the front end portion of the step frame 311 via the filter fixing bracket 349. Therefore, when the hydraulic pipe 222 in which the oil filter 152 is provided in the middle of the pipe is connected to the transmission charge pump 151 and the charge introduction oil passage 218, the hydraulic pipe 222 can be configured to be short.

A case support horizontal frame 319 is bridged between the left and right support leg frames 312 on the lower front side of the step frame 311, and the case support horizontal frame 319 is attached to the main shift lever 44, the steering handle 43, and the drive device (continuously variable transmission). Since the steering case 318 that is interlocked with the case 323 and the mission case 63) is attached, the rigidity of the front portion of the traveling machine body 1 (particularly near the driver's cab 5) can be improved by the presence of the case support horizontal frame 319. The steering case 318 can be supported with high rigidity by using the case support horizontal frame 319 that plays a role of reinforcing the front portion of the traveling machine body 1. Therefore, there is no significant deviation between the amount of operation of the main shift lever 44 and the steering wheel 43 and the output of the drive device (continuously variable transmission case 323 and mission case 63), and the running state is not expected by the operator. You can eliminate the risk of becoming. The case support horizontal frame 319 for reinforcement can also be used as a mounting portion for the steering case 318, and since a mounting base dedicated to the steering case 318 is not required, it contributes to cost reduction.

A continuously variable transmission case 323 in which a straight-ahead hydraulic continuously variable transmission 64 and a swivel hydraulic continuously variable transmission 70 are assembled is provided. The continuously variable transmission case 323 is fixed to the upper right side of the transmission case 63, and the operation arm bodies 355 and 369 for straight movement and turning are arranged on the front and rear surfaces of the continuously variable transmission case 323. That is, the straight-ahead hydraulic continuously variable transmission 64 and the turning hydraulic continuously variable transmission 70 are arranged side by side on the right side surface of the transmission case 63 opposite to the feeder house 11.

Therefore, since a space is created on the side (left side) of the feeder house 11 side of the mission case 63, the degree of freedom in designing the cutting section 3 is increased, and the cutting amount of the feeder house 11 and the cutting width of the grain header 12 are increased. It can be configured in the optimum size. Further, since the installation width of the feeder house 11 in the left-right direction is widened, the feeder house 11 can be installed on the side close to the position of the center of gravity when raising and lowering the grain header 12, and the support strength of the feeder house 11 of the cutting section 3 is increased. Can be enhanced.

The straight-moving operation shaft 325 as a straight-ahead output control unit is projected forward on the front-outer surface of the continuously variable transmission case 323, and the turning operation shaft 326 as a turning output control unit is directed backward on the rear-outer surface of the continuously variable transmission case 323. It is projected to. Although detailed illustration is omitted, the straight-ahead operation shaft 325 is connected to the straight-ahead operation arm body 355, and the swivel operation shaft 326 is connected to the swivel operation arm body 369. The straight-ahead connection link body 345 and the swivel connection link body 346 provided on the rear side of the steering case 318 are connected to the straight-ahead and swivel operation arm bodies 355 and 369, respectively, and the steering operation of the steering handle 43 and the main speed change lever. The operation of the straight-ahead hydraulic continuously variable transmission 64 and the turning hydraulic continuously variable transmission 70 is controlled by the shift operation of 44, and the course and the moving speed of the left and right crawler belts 2 can be changed.

The driver's cab (control unit) 5 provided at the front of the traveling machine body 1 is provided with a main shift lever (straight-moving operation tool) 44 for straight-ahead operation and a steering handle (turning operation tool) 43 for turning operation, and a driver's cab. A steering column 41 is arranged on the side of the drive device (mission case 63 and continuously variable transmission case 323). Below the driver's cab 5 in the front part of the traveling machine body 1, the steering case 318 that changes the output from the transmission case 63 according to the operation amount of the control handle 43 and the main shift lever 44 is a straight-ahead hydraulic continuously variable transmission. It is arranged on the side of the continuously variable transmission case 323 provided with 64 and the continuously variable transmission 70.

In this case, the steering wheel 43 is arranged in the front central portion of the driver's cab 5 in front of the driver's seat 42, and the steering wheel 43 is operated on the left side portion closer to the drive device (continuously variable transmission case 323 and mission case 63). A main shift lever 44 is arranged in the column 41. That is, the steering case 313 is arranged below the steering wheel 43, and the continuously variable transmission case 323 is arranged below the steering column 41 on which the main shift lever 44 is installed. As a result, each part of the operation system mechanism connected to the continuously variable transmission case 323 from the steering handle 43 and the main speed change lever 44 via the steering case 313 can be arranged close to each other, and each part of the operation system mechanism is connected. The link mechanisms 321, 322, 345, and 346 can be shortened to suppress fluctuations and deformations thereof. Therefore, the deviation between the operation amount of the main shift lever 44 and the steering handle 43 and the output of the drive device (continuously variable transmission case 323 and the transmission case 63) is suppressed, and a stable running state according to the operator's operation is maintained. it can.

The battery 230 that supplies electric power to the engine 7 is arranged below the driver's cab 5 in the front part of the traveling machine body 1, behind the steering case 318 and on the side of the continuously variable transmission case 32. That is, the battery 230 that supplies power to the engine 7 and the like is arranged in the area surrounded by the steering case 318, the drive device (continuously variable transmission case 323 and the mission case 63), and the engine 7 under the driver's cab 5. .. As a result, the dead space under the driver's cab 5 can be effectively used not only as an arrangement space for the steering case 318 and the continuously variable transmission case 323, but also as an arrangement space for the battery 230. Therefore, the battery 230 can be arranged close to the engine 7 and the driver's cab 5, and the electric system can be made compact. Further, it is possible to avoid increasing the size of the combine in order to secure the arrangement space for the battery 230.

A driver's cab (control unit) 5 is configured on a plurality of support leg frames 312 erected on the upper surface side of the traveling machine body 1. Then, the steering case is fixed to the case support horizontal frame (case support frame) 319 erected in the middle of the plurality of support leg frames 312, and is arranged above the continuously variable transmission case 323 and the battery 230. In this way, since the battery 230 and the steering case 318 are arranged in the upper and lower multi-stages below the front portion of the step frame 311, the space formed in the region adjacent to the continuously variable transmission case 323 at the rear of the steering case 318 is utilized. Therefore, the electric wiring for supplying electric power to the electric members of each part such as the engine 7 and the driver's cab 5 can be easily extended. It also contributes to the improvement of assembly workability and maintenance workability of the steering case 318 and the battery 230.

Further, since the oil filter 152 for filtering the hydraulic oil in the drive device (continuously variable transmission case 323 and mission case 63) is arranged in the above region under the driver's cab 5, the drive device (continuously variable transmission case 323) is arranged. The length of the hydraulic pipe 222 connecting the transmission case 63) and the oil filter 152 can be shortened, and the hydraulic pipe 222 can be easily routed.

In the upper part of the steering case 318, a lateral main shift input shaft 317 is arranged on one of the front and rear sides of the turning input shaft 316, and a lateral straight output shaft 350 is arranged on the other side. .. The main shift input shaft 317 and the straight output shaft 350 extend to the left and right in parallel with each other in a plan view, and are rotatably supported by the steering case 318. The main shift input shaft 317 and the straight-ahead output shaft 350 are pivotally supported so as to project outward (to the left) from the left side surface of the steering case 318. A swivel output shaft 164 extending in a direction orthogonal to the straight-ahead output shaft 350 is pivotally supported on the back surface of the steering case 318, below the straight-ahead output shaft 350, so as to project outward (rearward) from the steering case 318. ..

The straight-ahead connecting link body 345 is connected to the straight-ahead output shaft 350 by inserting a protruding end (left end) of the straight-ahead output shaft 350 into one end (right end) of the cylindrical shaft connecting body 351. At the other end (left end) of the shaft connecting body 351 is inserted a straight-ahead relay shaft 352 pivotally supported by a speed change output support bracket 328 fixed to a support leg frame 312 at the left front position of the driver's cab 5. By adjusting the left-right position of the straight-moving relay shaft 352 with respect to the shaft connecting body 351, the installation position of the straight-moving connecting link body 435 in the left-right direction is adjusted.

One end (rear end) of the straight-ahead relay arm body 353 extending in the front-rear direction is fixed to the other end of the straight-ahead relay shaft 352, and the straight-ahead relay shaft 352 is rotated in response to the rotation of the straight-ahead relay shaft 352. The other end (front end) of the relay arm body 353 is swung up and down. The other end (front end) of the straight-ahead relay arm body 353 is connected to one end (upper end) of the straight-ahead connecting rod 354 extending vertically, and the other end (lower end) of the connecting rod 354 is for straight-ahead movement. It is connected to the operation arm body 355 of.

The straight-ahead connecting link body 345 connects a straight-moving relay shaft 352 extending in the left-right direction at a position on an extension line of the straight-ahead output shaft 350 by a shaft connecting body 351 and a speed change output fixed to a support leg frame 312. The support bracket 328 supports the shaft. As a result, the straight-ahead relay shaft 352 rotates together with the straight-ahead output shaft 350, and swings the front end of the straight-ahead relay arm body 353 fixed to the left end of the straight-ahead relay shaft 352. Then, the straight-ahead connecting rod 354 having both ends pivotally attached to the front end of the straight-ahead relay arm body 353 and one end of the straight-ahead operation arm body 355 moves up and down according to the swing of the straight-ahead relay arm body 353. As a result, the straight-ahead operation shaft 325 having a protruding end (front end) fixed to the other end of the operation arm body 355 is rotated.

On the other hand, the swivel connecting link body 346 is a first extending to the left and right at the other end (tip) of the output arm body 362 to which one end (base end) is fixed to the protruding end (rear end) of the swivel output shaft 361. One end (right end) of the relay rod 363 is connected. The first relay rod 363 extends to the left and right at the rear position of the steering case 318 so as to straddle the upper front side of the continuously variable transmission case 323, and the other end (left end) of the first relay rod 363 is a relay for turning. It is connected to the first turning relay arm body 364 fixed to one end (front end) of the shaft 365. The swivel relay shaft 365 is supported by penetrating the tubular shaft support 366.

On the other hand, the second relay rod 368 extending to the left and right to the other end (tip) of the turning operation arm body 369 whose one end (base end) is fixed to the protruding end (rear end) of the turning operation shaft 326. One end (right end) is connected. The second relay rod 368 extends to the left and right along the back surface of the transmission case 63 and the continuously variable transmission case 323, and the other end (left end) of the second relay rod 368 is one end (rear) of the turning relay shaft 365. It is connected to the second turning relay arm body 367 fixed to the end).

The shaft support 366 that pivotally supports the turning relay shaft 365 is provided on the mission case 63 by bolting the other end of the support plate 370, one end of which is fixed to the outer peripheral surface of the shaft support 366, to the upper surface of the mission case 63. It is fixed to the left side position of the continuously variable transmission case 323. Further, on the outer peripheral surface of the shaft support 366, a pipe fixing portion 372 for fixing the position by passing a hydraulic pipe 223 connected to the mission case 63 is provided.

The swivel connecting link body 346 is a first relay rod extending in the left-right direction on an output arm body 362 whose tip swings left and right in accordance with the rotation of the swivel output shaft 361 projecting behind the steering case 318. The right end of 363 is pivotally attached. Therefore, the first relay rod 363 moves in the left-right direction in accordance with the swing of the output arm body 362, and the tip of the first relay arm body 364 whose base end is fixed to the front end of the turning relay shaft 365 moves left and right. Swing. The swing of the tip of the first swivel relay arm body 364 causes the swivel relay shaft 365 pivotally supported by the shaft support 366 to rotate, and at the same time, the base end is fixed to the rear end of the swivel relay shaft 365. The tip of the second turning relay arm body 364 is swung left and right. Then, the second relay rod 368, whose both ends are pivotally attached to the front end of the second turning relay arm body 367 and one end of the turning operation arm body 369, is left and right in response to the swing of the second turning relay arm body 367. By moving to, the swivel operation shaft 326 having a protruding end (rear end) fixed to the other end of the operation arm body 369 is rotated.

The main shift input shaft 317 projects from the steering case 318 toward the left and right center side of the traveling machine body 1. The protruding end (left end) of the main shift input shaft 317 is pivotally supported by the main shift input support bracket 381 fixed to the step frame 311 on the left edge on the transmission case 63 side. Further, one end (front end) of the main shift arm body 382 is connected to the protruding end (left end) of the main shift input shaft 317, and the other end (rear end) of the main shift arm body 382 is the main shift lever 44. It is connected to the main speed change operation rod 322 connected to.

A straight-ahead hydraulic continuously variable transmission 64 and a swivel hydraulic continuously variable transmission 70 that shift the power of the engine 7 are arranged side by side on the driver's cab (control unit) 5 side of the left and right sides of the transmission case 63. .. The straight-moving operation shaft 325 of the straight-ahead hydraulic continuously variable transmission 64 and the turning operation shaft 326 of the swivel hydraulic continuously variable transmission 70 are provided so as to be distributed to the front and rear. Since the straight-ahead hydraulic continuously variable transmission 64 and the swivel hydraulic continuously variable transmission 70 are arranged side by side on the driver's cab 5, the connection structure with the steering case 318 can be shortened.

Further, by arranging the straight-ahead operation shaft 325 and the turning operation shaft 326 in the front-rear direction, the same positional relationship as the straight-ahead output shaft 350 and the turning output shaft 361 arranged in the front-rear direction in the steering case 318 can be obtained. As a result, the structure of the link mechanism from the steering case 318 to the straight-ahead hydraulic continuously variable transmission 64 and the swivel hydraulic continuously variable transmission 70 can be simplified, and the continuously variable transmission case 323 and the steering case 318 are located below the driver's cab 5. Can be installed compactly by bringing them close to each other.

The steering case 318 is located below the driver's cab (control unit) 5 and above the drive device (continuously variable transmission case 323 and mission case 63), and the straight output shaft 350 and the turning output shaft 361 collide with the steering case 318. It is installed. The straight-ahead connecting link body 345 that connects the straight-ahead output shaft 350 and the straight-ahead operation shaft 325, and the swivel connecting link body 346 that connects the swivel output shaft 361 and the swivel operation shaft 326 are each a steering case 318 and none in a plan view. It is installed between the speed change cases 323. That is, since the straight-ahead connecting link body 345 and the turning connecting link body 346 are arranged together with the mission case 63 on the driver's cab 5, the assembling property and the maintainability are improved.

A straight-ahead connection link body 345 that interlocks and connects the steering case 318 and the straight-ahead operation shaft 325, which is a straight-ahead output control unit, is supported by a support leg frame 312 that supports the driver's cab 5. The steering case 318 is fixed to a case support horizontal frame (case support frame) 319 erected in the middle of the left and right support leg frames 312 that support the driver's cab (control unit) 5 front position. Then, the straight-ahead connecting link body 345 is supported by the left support leg frame 312 on the transmission case 63 (continuously variable transmission case 323) side.

The support leg frame 312 that supports the driver's cab 5 is connected to the straight-ahead connection link body 345 that interlocks and connects the steering case 318 and the straight-ahead operation shaft 325 (straight-ahead output control unit) provided in the drive devices (continuously variable transmission case 323 and transmission case 63). Is supported by. Therefore, even if the linearly connected link body 345 is bent or pulled by the vibration of the drive device (continuously variable transmission case 323 and the mission case 63), the support leg frame 312 that supports the driver's cab 5 makes the linearly connected link body 345 highly rigid. It is possible to suppress fluctuations and deformations of the straight-ahead connecting link body 345. Therefore, there is no significant deviation between the amount of operation of the main shift lever 44 and the steering wheel 43 and the output of the drive device (continuously variable transmission case 323 and mission case 63), and the running state is not expected by the operator. You can eliminate the risk of becoming.

A continuously variable transmission case 323 containing a straight-ahead hydraulic continuously variable transmission 64 and a swivel hydraulic continuously variable transmission 70 is fixed at an upper position on the right side surface of the transmission case 63. Then, the swivel connection link body 346 is supported on the upper surface of the transmission case 63 and on the continuously variable transmission case 323 side. By utilizing the space between the feeder house 11 and the driver's cab 5, the swivel connection link body 346 can be supported compactly and with high rigidity on the transmission case 63 having the same vibration system as the continuously variable transmission case 323. Therefore, the bending and tension of the swivel connecting link body 346 due to mechanical vibration are suppressed, and the amount of operation of the main speed change lever 44 and the steering handle 43 and the output of the drive device (stepless speed change case 323 and mission case 63) There is no significant deviation between them, and there is no risk of a running state that the operator does not expect.

1 Traveling machine 3 Cutting part 5 Driver's cab 7 Engine 9 Threshing part 11 Feeder house 17 Supply conveyor 311 Step frame 312 Support leg frame 313 Boarding / alighting step 314 Hydraulic valve unit body 315 Hydraulic oil tank 316 Swivel operation shaft 317 Main shift input shaft 318 Steering Case 319 Case support Horizontal frame 321 Steering shaft 322 Main speed change operation rod 323 Stepless speed change case 325 Straight operation shaft 326 Turning operation shaft 327 Vertical support 328 Support leg frame 312
329 Hydraulic piping 345 Straight connection link body 346 Swivel connection link body 349 Filter fixing bracket 350 Straight output shaft 351 Axis connection body 352 Straight relay shaft 353 Straight relay arm body 354 Connection rod 355 Operation arm body 361 Swivel output shaft 362 Output arm Body 363 1st relay rod 364 1st swivel relay arm body 365 Swivel relay shaft 366 Shaft support 367 2nd swivel relay arm body 368 2nd relay rod 369 Operation arm body 370 Support plate 371 Piping fixing part

Claims (4)

A sorting wind is supplied to a cutting section that takes in the uncut grain while cutting, a threshing section that threshes the harvested grain supplied from the cutting section, and a grain sorting mechanism arranged below the threshing section. winnowing fan and, cutting and feeder house to be introduced into the threshing section conveys the culms, the feeder house of the traveling part of the left and right to shift the power of mounting the engine and vehicle body are arranged on one side of the machine body transverse direction It has a drive device for transmitting to, a straight-moving operation tool for straight-ahead operation, a turning operation tool for turning operation, and a steering case for changing the output of the driving device according to the operation amount of both operating tools. In a combine harvester in which both operating tools are arranged in a control unit located on one side of the front portion of the traveling machine in the width direction of the drive device.
A straight-moving hydraulic continuously variable transmission and a swivel hydraulic continuously variable transmission for shifting the power of the engine are arranged side by side on the control portion side of the left and right side surfaces of the drive device, and the straight-moving hydraulic continuously variable transmission is provided. The straight-moving operation shaft of the machine and the turning operation shaft of the swivel-type continuously variable transmission are provided so as to be distributed back and forth.
A forward / reverse switching case is provided as a forward / reverse switching mechanism for driving the supply conveyor in the feeder house in the forward / reverse direction, and the forward / reverse switching case is arranged on the other side of the feeder house in the machine width direction .
The cutting portion is provided with a counter shaft for transmitting the driving force of the engine, the wall insert shaft which is the rotation shaft of the wall inserter has a hollow tube shape, and the counter shaft is inserted into the hollow portion of the wall inserter shaft. Combine, characterized by that. It has a drive shaft that extends in the width direction of the machine and drives the supply conveyor.
The combine according to claim 1, wherein a driving force is input to the drive shaft from an end on the other side in the width direction of the machine body. The steering case is arranged below the steering unit and above the drive device, and a straight-ahead output shaft and a turning output shaft project from the steering case.
The straight-ahead link body connecting the straight-ahead output shaft and the straight-ahead operation shaft, and the swivel-linking link body connecting the swivel output shaft and the swivel operation shaft, respectively, are the steering case and the drive device in a plan view. The combine according to claim 1 or 2, wherein the combine is installed between the two. The steering case is fixed to a case support frame erected in the middle of the left and right support leg frames that support the front position of the control portion, and is fixed to the case support frame.
The combine according to claim 3, wherein the straight connecting link body is supported by the support leg frame on the drive device side.

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