JP5215491B2 - Paddy field machine - Google Patents

Description

The present invention also relates to a paddy field work machine such as a rice planting machine and Tadashi Mizuta seeder.

  In recent years, in rice transplanters, hydrostatic continuously variable transmissions (HST) and belt-type continuously variable transmissions have been introduced as travel transmissions in place of gear shift types.

The introduction of the continuously variable transmission can be easily performed without requiring the operation of the main clutch, unlike the gear shift type transmission, and can be started at zero speed especially in the hydraulic type. There, is also of a is effective in improving the speed change operability, various operations other than the running speed is supposed to operate a separate operating member, respectively, the other operations in relation to the traveling speed change operation In such a case, it is necessary to switch from the shift lever to another operation tool, which is troublesome. In particular, many operations are often performed in a short time when changing the direction of the aircraft at the shore, which makes the operation more troublesome.

  The present invention has been made paying attention to such points, and by giving many functions to the speed change lever, other operations related to the travel speed change operation can be performed lightly and quickly without changing the lever. Thus, the main purpose is to improve the operability of the paddy field machine.

[Configuration of the invention according to claim 1]

According to the first aspect of the present invention, the forward shift operation path and the reverse shift operation path are spaced at a predetermined interval so that the neutral position of the forward shift operation path and the neutral position of the reverse shift operation path are adjacent to each other. Set in parallel,
A speed change lever that continuously changes the traveling speed is configured to be operable along a neutral position of the forward and reverse speed change operation paths and the forward and reverse speed change operation paths.
Linking the speed change lever and the engine speed control mechanism,
Engine rotation speed when the shift lever is operated to the neutral position of the reverse shift operation path, and engine rotation when the shift lever is operated to a position corresponding to the first reverse speed of the reverse shift operation path Configure the speed to be the same,
The rotational speed of the engine when the shift lever is operated at the highest speed position on the reverse shift operation path is higher than the rotational speed of the engine when the shift lever is operated at the highest speed position on the forward shift operation path. It is configured to be smaller.

[Configuration of the invention according to Claim 2]

According to a second aspect of the present invention, in the first aspect of the invention, the speed control mechanism is operated as the shift lever is operated from a neutral position side of the forward shift operation path to a high speed position side of the forward shift path. Is operated to the high rotation side, and the speed control mechanism is operated to the low rotation side as the shift lever is operated from the high speed position side of the forward shift operation path to the neutral position side of the forward shift operation path. It is configured.

[Configuration of the invention according to claim 3]

According to a third aspect of the present invention, in the invention according to the second aspect, the speed control mechanism is operated as the shift lever is operated from a neutral position side of the forward shift operation path to a high speed position side of the forward shift path. As the speed change lever is operated from the high speed position side of the forward speed change operation path to the neutral position side of the forward speed change operation path, the speed control mechanism is linearly lowered. It is configured to operate on the rotation side.

Overall side view of riding rice transplanter Overall plan view of riding rice transplanter Side view of speed change operation structure Control block diagram The top view which shows the lever guide part of the 1st example A diagram showing the relationship between the shift lever position and the engine speed Plan view showing the lever guide of the third example The top view which shows the lever guide part of the 4th example The top view which shows the lever guide part of the 5th example The top view which shows the lever guide part of the 6th example The top view which shows the lever guide part of the 7th example The top view which shows the lever guide part of the 8th example

FIG. 1 shows an entire side surface of a riding type rice transplanter, which is an example of a paddy field working machine according to the present invention, and FIG. The riding rice planting machine, the rear portion of the run line body 3 of the four-wheel drive with the front wheels 1 and rear wheels 2, seedling planting apparatus 4 of Article 6 planted specifications as paddy working device is driven by a hydraulic cylinder 5 It has a basic structure in which a fertilizer device 7 is provided at the rear part of the traveling machine body 3 while being connected to be movable up and down through a lifting link mechanism 6 having a parallel quadruple link structure.

  A gasoline engine 8 is mounted on the front of the traveling body 3 and the output thereof is belt-transmitted to a hydrostatic continuously variable transmission (HST) 9 which is a main transmission capable of switching between forward and backward travel. The shift output is input to the transmission case 10 and further gear-shifted into two steps of high and low by an auxiliary transmission (not shown), and then transmitted to the front wheels 1 and the rear wheels 2. Further, the working power branched from the traveling system in the mission case 10 is transmitted to the seedling planting device 4. A speed change lever 11 for operating the continuously variable transmission 9 is provided on the left side of the steering handle 12 of the boarding operation portion so as to be able to swing back and forth, and a sub speed change for operating the sub transmission in the transmission case 10. The lever 13 is provided on the left side of the driver's seat 14 of the boarding driving part, and further, the main clutch in the mission case 10 is disengaged by depressing the right front foot of the boarding driving part and the brake provided for the traveling system is braked. A pedal 15 for stopping the machine body is provided.

  The seedling planting device 4 has a seedling placing table 16 on which seedlings are placed and reciprocally moved laterally at a fixed stroke, and six sets of rotary types that cut out and plant seedlings one by one from the lower end of the seedling placing table 16. Planting mechanism 17 and three leveling floats 18 for leveling the planned planting location of the field, etc., are installed on the left and right sides of the rear portion of the three planting cases 19 supported in parallel in a rearward cantilevered manner. Two sets of 17 are mounted. In addition, the seedling planting device 4 has a pair of left and right drawing markers 20 for scratching and forming a running reference line in the next stroke after the U-turn on the non-planting side surface during planting traveling in one stroke in the reciprocating planting form, It is provided so as to be able to switch between a working posture projecting laterally and a stowed stowing posture, and the drawing marker 20 is stowed and locked in conjunction with the raising of the seedling planting device 4. Only the released drawing marker 20 is configured to be oscillated and oscillated to the action posture when the seedling planting device 4 is lowered.

  The three leveling floats 18 are each supported so as to be able to swing up and down around the rear fulcrum, and the center leveling float 18 is a sensor float SF for controlling the raising and lowering of the seedling planting device 4 with respect to the rice field. It is used as. That is, the vertical position of the sensor float SF is detected by the sensor 21 composed of a potentiometer, the detected value is compared with a preset reference value by the control device 22, and the detected value from the sensor 21 is held at the reference value. In this way, an automatic elevating control device is configured to control the electromagnetic control valve 23 of the hydraulic cylinder 5 to raise and lower the seedling planting device 4 so that the seedling planting device 4 follows the rice field.

  The shift lever 11 serves not only to change the traveling speed but also to function as a composite operation lever that activates other mechanism parts, some examples of which will be described below.

  [First example]

  3 to 5 show a first example of a speed change operation structure. In this example, the speed change lever 11 also has a function as an accelerator adjusting lever of the engine 8 and a lever for raising the seedling planting device. In other words, the speed adjusting mechanism 25 provided in the engine 8 has a throttle opening degree based on fluctuations in the engine speed so that the engine speed is stably maintained within the set range corresponding to the operation position of the speed adjusting lever 26. Is automatically adjusted, and a well-known mechanical governor is used. An operation lever 28 driven by an electric motor 27 with a speed reducer and the speed control lever 26 are linked by an operation wire 29, and an accelerator set operation of the speed control mechanism 25 is electrically executed via the electric motor 27. It has come to be. The operation of the electric motor 27 is controlled by the control device 22. The control device 22 detects the operation position of the potentiometer 30 for detecting the operation position of the speed change lever 11 and the operation lever 28. A feedback potentiometer 31 is connected, the operation of the electric motor 27 is controlled based on the detected information, and the accelerator setting operation of the speed adjusting mechanism 25 is performed as follows.

Here, as shown in FIG. 3, the speed change lever 11 is supported by a support plate 42 that is supported by a fixed frame 41 so as to be rotatable around a horizontal horizontal fulcrum a so as to be able to swing laterally around a fulcrum b. An operation rod 44 extending upward from the fixed lever guide 43 and extending downward from the support plate 42 that rotates integrally with the speed change lever 11 is rotatable about a fulcrum c. A bell crank 45 and a rod 46 are mechanically linked to an operation arm 48 provided on a speed change operation shaft 47 of the continuously variable transmission 9. Further, the guide rod portion 11 a bent and extended downward from the fulcrum portion of the transmission lever 11 is inserted and guided in the guide groove 50 of the guide plate 49 attached to the fixed frame 41, thereby restricting the movement path of the transmission lever 11. ing. The guide groove 50 is formed in a stepped shape toward the front-rear direction. As shown in FIG. 5, the operation path viewed from above the lever guide 43 includes a forward transmission operation path F and a reverse transmission operation path R. They are displaced parallel to each other and in a stepped manner, and are connected in communication at the neutral position N.

Number on the outer periphery of the support plate 42 together with the concave portion for determining Iji (in this nine in the example) is formed, the distal end roller 53 of the detent lever 52 one to made plate spring one of the recessed portions Is configured to be elastically engaged to hold the transmission lever 11 at a plurality of operation positions. Specifically, in the forward shift operation path F, in addition to the neutral position N, five forward shift positions f1 to f5 are set, and in the reverse shift operation path R, in addition to the neutral position N, the third reverse shift position is set. Shift positions r1 to r3 are set.

  Although the detailed structure is omitted, the bell crank 45 and the airframe stopping pedal 15 are mechanically linked to each other, and the pedal 15 is depressed during forward or reverse to disengage the main clutch. When the vehicle is stopped by braking the brake, the bell crank 45 is forcibly rotated to a neutral position by a part of the pedaling force, and the shift lever 11 is forcibly returned to the neutral position N. .

FIG. 6 shows the relationship between the speed change position of the speed change lever 11 and the target rotational speed (accelerator set speed) of the engine 8. That is, when the shift lever 11 is in the neutral position N, the target rotational speed is set to the idling rotational speed n0 (for example, 1700 rpm), and the speed is linearly increased from the neutral position N to the third forward speed [f3]. From the third forward speed [f3] to the fifth forward speed [f5], the maximum rotational speed n4 (for example, 3600 rpm) is set, and for the first forward speed [f1], the first set rotational speed n1 (for example, 2500 rpm) and the second forward speed [f2]. ], The second set rotational speed n2 (for example, 3000 rpm) appears. In the reverse speed change operation path R, the target rotational speed is set to a third set rotational speed n3 (for example, 3200 rpm) that is slightly lower than the maximum rotational speed n4 .

  In this case, the relationship between the speed change set by the speed change lever 11 and the accelerator set is stored in advance, and the target rotational speed set position of the speed control lever 26 corresponding to the operation position of the speed change lever 11 is determined. The electric motor 27 is feedback-controlled so as to move the speed adjusting lever 26 toward the set target rotational speed set position, and the accelerator set corresponding to the operation position of the speed change lever 11 is automatically performed.

Further, the sub-forward shift operation path F ′ that can be transferred by the linear movement operation in the forward direction that continues from the neutral position N (r) of the reverse shift operation path R is a low speed side portion ( forward 1) of the regular forward shift operation path F. From the speed [f1] to the forward second speed [f2]) is provided continuously. Therefore, the shift lever 11 can be operated linearly over the sub-forward shift operation path F ′ and the reverse shift operation path R to perform a quick forward / reverse switching shift (shuttle shift). Since the maximum forward speed by the shuttle shift is limited to the second forward speed [f2] by the front end of the sub-forward speed change operation path F ′, there is no possibility of inadvertently switching from the reverse speed to the forward speed.

Further, a means for detecting that the shift lever 11 is in the reverse shift operation path R or the sub-forward shift operation path F ′ is provided beside the operation path of the shift lever 11. This lever position detecting means is composed of a sensing lever 56 which is operated to swing by contact with the shift lever 11 in the reverse shift operation path R or the sub-forward shift operation path F ′, and a switch 57 which detects the swing. From the detection information of the switch 57 and the potentiometer 30, it is determined whether the shift lever 11 is in the reverse shift operation path R or the sub-forward shift operation path F ′. When it is determined that the vehicle is in R, the accelerator is set to the third set rotational speed n3 lower than the maximum speed as described above, and it is also determined that the vehicle is in the auxiliary forward speed change operation path F ′. Then, the accelerator is set to the third set rotational speed n3 which is the same as the reverse speed change operation path R.

  When it is determined that the shift lever 11 has been operated from the normal forward shift operation path F to the sub-forward shift operation path F ′, the forced raising control of the seedling planting device 4 is executed, and the shift lever 11 is The forced raising control of the seedling planting device 4 is also executed by determining that the reverse side neutral position N (r) and the reverse shift operation path R are operated. That is, the automatic ascent control (low speed up control) at low speed forward when the speed change lever 11 is operated in the sub-forward speed change operation path F ′ and the automatic ascent control (backup control) when reverse is executed are executed. The planting device 4 is preferentially driven up to the upper limit.

Here, when the forward shift position (f1 ′ to f2 ′) is selected in the auxiliary forward shift operation path F ′ where the low speed up control is performed, the same forward shift position (f1 to f2) is selected in the forward shift operation path F. Since the engine speed is higher than that in the case where the engine speed is set (same as the engine speed during reverse travel), the amount of discharge from the hydraulic pump directly connected to the engine 8 is sufficiently secured, and the operating speed of the hydraulic cylinder 5 Becomes fast, and the seedling planting device 4 is quickly raised.

Further, the control device 22 is connected with a steering angle sensor 58 for detecting a turning angle from the neutral position of the front wheel 1, and the front wheel 1 is steered to a larger angle than a set angle (for example, 30 degrees). When detected, control (auto-up control) for automatically raising the seedling planting device 4 is executed. The auto up control can be turned on / off by a changeover switch 59. In the modified field, the auto switch up is stopped by switching the changeover switch 59 to the off position so that the traveling machine body 3 can be operated greatly. It is possible to avoid the seedling planting device 4 from being inadvertently raised by the auto-up control during the curve planting traveling with many opportunities to turn. Even when the auto up control is stopped by the changeover switch 59, the low speed up control and the backup control based on the determination of the operation position of the speed change lever 11 are always executed with priority.

  In addition, when the above-described low-speed up control, backup control, and auto-up control are activated and the seedling planting device 4 is driven up, a planting clutch 60 (mission mission) that interrupts power transmission to the seedling planting device 4 The interior of the case 10 is cut and operated by the electric motor 61.

  A cross swing type operation lever 62 biased to return to neutral is provided on the right side of the steering handle 12, and the up / down operation of the operation lever 62 is detected by a switch (not shown). ing. Then, by operating the operation lever 62 once upward from the neutral position, the seedling planting device 4 is preferentially driven up to the upper limit, and the planting clutch 60 is turned off by the electric motor 61. Further, when the operation lever 62 is operated once from the neutral position while the seedling planting device 4 is raised, the seedling planting device 4 is lowered with priority. Further, after the lowering operation, the operation lever 62 is lowered again for the second time from the neutral position so that the planting clutch 60 is operated by the electric motor 61 and the driving of the seedling planting device 4 is started. .

  Further, when the operation lever 62 is swung forward, the storage lock of the left drawing marker 20 is released, and when the operation lever 62 is swung back, the storage lock of the right drawing marker 20 is released. As described above, the operation lever 62 and a marker storage lock mechanism (not shown) are mechanically linked by wire.

  [Second example]

In the same structure as the first example, when it is determined that the shift lever 11 is operated from the forward shift operation path F to the sub-forward shift operation path F ′, the forced raising control of the seedling planting device 4 is executed. When it is determined that the planting clutch 60 is disengaged and the shift lever 11 is again operated from the forward shift operation path F to the sub-forward shift operation path F ′, the forced lowering control of the seedling planting device 4 is executed. , that is, it is also possible to shift lever 11 is configured to perform alternately increase control and lowering control of the planting device 4 each time that will be operated in the secondary forward shift operation path F '.

  [Third example]

FIG. 7 shows the speed change operation path in the third example. In this example, the auxiliary forward speed change operation path F ′ in the first example is formed on the lateral side of the entire area of the forward speed change operation path F, and the forward / reverse switching can be quickly performed by a linear operation. The lever 11 can be moved from an arbitrary shift position of the forward shift operation path F to the sub-forward shift operation path F ′ to raise the seedling planting device 4.
Further, by introducing the second example of the technology to the third example, the shift lever 11 to perform increase control and falling control of planting apparatus 4 alternately each time the Ru is operated in the secondary forward shift operation path F ' It can also be configured.

  [Fourth example]

FIG. 8 shows the speed change operation path in the fourth example. In this example, in the structure of the first example, a partition wall 65 is formed between the reverse shift operation path R and the sub-forward shift operation path F ′, and forward / reverse switching (shuttle shift) by linear operation is not possible. However, low speed up control and backup control by the shift lever 11 can be performed.
In this case, it is also possible to speed change lever 11 as in the second example is configured to perform alternately increase control and lowering control of the planting device 4 each time that will be operated in the secondary forward shift operation path F '.

  [Fifth example]

FIG. 9 shows a speed change operation path in the fifth example. In this example, based on the first example, the basic structure is the left and right from the forward speed change operation path F at the middle speed position [f4], which is faster than the auxiliary forward speed change operation path F ′ and lower than the maximum speed [f5]. Marker selection operation paths ML and MR are extended. In this example, the support plate 42 has no positioning recess in the entire range of the sub-forward speed change operation path F ′ and in the low speed range from the neutral position N (r) to the reverse speed 2 in the reverse speed change operation path R. The shift can be held in stages. Further, the shift lever 11 is configured to alternate the increasing control and lowering control of the planting device 4 each time that will be operated in the secondary forward shift operation path F '. Further, by operating any of the marker selection operation path ML, MR, planting clutch 60 that are adapted to be placed by the electric motor 61. In this example, the lifting of the seedling planting apparatus 4 in the shift lever 11, turning on and off of the planting clutch 60, and, can be performed to select a drawing marker 20, the operating lever 62 in the first embodiment is not required.

According to this configuration, when the planting traveling of one stroke is finished, the shifting lever 11 is operated to the auxiliary forward shifting operation path F ′ to reduce the traveling speed, and the seedling planting device 4 can be controlled by the low speed up control. raised, and can Ru off the planting clutch 60, changing directions of the vehicle body 3 in this state. Then, when the direction change is about to end, the shifter 11 is operated again from the forward shift operation path F to the sub-forward shift operation path F ′ so that the seedling planting device 4 remains in the state where the planting clutch 60 remains disconnected. Lower to the surface. After the alignment, the speed change lever 11 is speeded up to the middle speed position [f4] of the forward speed change operation path F and operated to one of the left and right marker selection operation paths ML and MR, so The drawing marker 20 can be protruded to the action posture. In this example, by operating the speed change lever 11 to one of the marker selection operation paths ML and MR, the planting clutch 60 is engaged by the electric motor 61, and planting traveling at a medium speed is started. Become. Thereafter, if necessary, the maximum speed [f5] of the speed change lever 11 can be selected to perform efficient planting traveling.

  [Sixth example]

  FIG. 10 shows the speed change operation path in the sixth example. This example is a modification of the fifth example described above, and the marker selection operation paths ML and MR extend from the maximum speed position of the forward shift operation path F to the left and right, and although not shown, A switch for turning on and off the planting clutch is provided on the grip so that the finger can be operated.

According to this configuration, when the planting traveling of one stroke is finished, the shifting lever 11 is operated to the auxiliary forward shifting operation path F ′ to reduce the traveling speed, and the seedling planting device 4 can be controlled by the low speed up control. raised, and can Ru off the planting clutch 60, changing directions of the vehicle body 3 in this state. Then, when the direction change is about to end, the shifter 11 is operated again from the forward shift operation path F to the sub-forward shift operation path F ′ so that the seedling planting device 4 remains in the state where the planting clutch 60 remains disconnected. Lower to the surface. After the alignment, the speed change lever 11 is speeded up to the maximum speed position [f5] of the forward speed change operation path F and operated to one of the left and right marker selection operation paths ML, MR, so The drawing marker 20 can be protruded to the action posture. In this example, by operating the speed change lever 11 to one of the marker selection operation paths ML and MR, the planting clutch 60 is engaged by the electric motor 61, and planting traveling at high speed is started. .

Here, since the planting clutch 60 can also be turned on by a switch provided on the grip portion of the transmission lever 11, after the alignment, the transmission lever 11 is operated to an arbitrary position on the forward transmission operation path F, and by operating the switch to put the planting clutch 60 starts planting traveling may thereafter to the left and right marker selection operation path ML, switching the working position the required drawing marker 20 by operating one of the MR.

As the form of the rice planting work, when ridge leaving a space one stroke amount starts planting reciprocating, planted there are forms to perform around along Azesai after the reciprocating planting is complete, in this case, planting reciprocating Before starting the operation, one of the drawing markers 20 is switched to the working posture and only the drawing is performed without planting, and one of the marker selection operation paths ML and MR is operated to switch the drawing marker 20 to the working posture. after the, the switch of the shift lever 11 can cut planting clutch 60 by finger manipulation.

  [Seventh example]

  FIG. 11 shows the speed change operation path in the seventh example. In this example, the shift lever 11 can be operated to the left and right in the forward shift operation path F and is urged to return to neutral in the lateral direction, and the shift lever 11 is laterally operated to the left in the low speed range. The seedling planting device 4 is raised, the planting clutch 60 is turned off, the shift lever 11 is operated laterally to the right, the seedling planting device 4 is lowered, and the seedling planting device 4 is further lowered. The planting clutch 60 is engaged and operated by the second lateral operation to the right.

  Further, marker selection operation paths ML and MR are extended from the middle speed position of the forward speed change operation path F to the left and right, and the drawing marker 20 on the side operated by the selection operation to the marker selection operation paths ML and MR is extended. The storage lock is released, and the planting clutch 60 is engaged and operated.

  [Eighth example]

  FIG. 12 shows the speed change operation path in the eighth example. This example is a modification of the seventh example, and the marker selection operation paths ML and MR are extended from the maximum speed position of the forward shift operation path F, and to the left in the entire area of the forward shift operation path F. When the seedling planting device 4 is raised, the planting clutch 60 is disengaged, the shift lever 11 is laterally operated to the right, the seedling planting device 4 is lowered, and the seedling planting device 4 is further lowered. The planting clutch 60 is engaged and operated by a second lateral operation to the right after the operation.

8 engine 11 gear shift levers
2 5 governor Organization
F forward shift operation diameter line
R Reverse shift operation path N Neutral position N (r) Reverse shift operation path neutral position

Claims (3)

The a forward shift operation diameter path and the backward shift operation diameter passage such that said neutral position of the forward shift operation diameter passage and the neutral position of the reverse gear shift operation diameter path communicate with each adjacent parallel with a predetermined interval Prepared,
The shift lever for shifting the speed in the continuously variable, the forward and neutral positions of the reverse speed operation diameter path, operably configured along the forward and reverse gear shift operation diameter passage,
Linking the speed change lever and the engine speed control mechanism,
Engine in a state where the shift lever and the rotational speed of the engine in a state of being operated to the neutral position of the reverse gear shift operation diameter path, and operating the shift lever to the position corresponding to the one reverse speed of the reverse gear shift operation diameter passage Is configured so that the rotation speed is the same,
The rotational speed of the engine when the shift lever is operated at the highest speed position on the reverse shift operation path is higher than the rotational speed of the engine when the shift lever is operated at the highest speed position on the forward shift operation path. Paddy field machine configured to be smaller. Take the shift lever from the neutral position side of the forward speed change operation diameter path to operate to the forward speed change operation diameter passage speed position side, to actuate the speed control mechanism at a high rotation side, the forward said shift lever brought from the high-speed position side of the gear shifting operation diameter path to operate to the neutral position side of the forward speed change operation diameter path, paddy of claim 1 which is configured to activate the speed control mechanism on the low rotation side Work machine. Take the shift lever from the neutral position side of the forward speed change operation diameter path to operate to the forward speed change operation diameter passage speed position side, linearly actuated in the high speed side of the speed control mechanism, the shift lever the as the operated from speed position side of the forward shift operation diameter path toward the neutral position side of the forward speed change operation diameter passage, linearly claims are configured to actuate the low-rotation and the speed control mechanism Item 2. A paddy field machine according to Item 2.

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