JP4897744B2 - Combine - Google Patents

Description

  The present invention relates to a combine.

Conventionally, the combine is configured to transmit the power from the engine E to the traveling transmission system of the transmission case M via the hydrostatic continuously variable transmission 10 as shown in Patent Document 1, for example. The power from the output shaft 13 of the transmission 10 is changed by the high speed transmission gear 18 and the shift gear 19 of the first shaft S1, and the high speed input gear 20, the medium speed input gear 21 and the low speed input gear 22 of the second shaft S2. In some cases, the sub-transmission device includes a main transmission lever 6 for shifting the continuously variable transmission 10 and a sub-transmission lever 7 for shifting the sub-transmission device.
That is, there is a configuration in which a traveling speed change operation device is configured such that a continuously variable transmission 10 as a main transmission is operated to be shifted by a main transmission lever 6 and a sub transmission is operated to be shifted by a sub transmission lever 7.

JP 2000-94988 A ([0017]-[0020], FIGS. 2 and 3)

Japanese Patent Laid-Open No. 10-30721 ([0010]-[0014], FIGS. 1, 2, 3, 6)

  An object of the present invention is to provide a combine capable of advantageously performing an appropriate shift traveling according to the operation on the operation surface or the like during both the work traveling and the traveling traveling.

In the first aspect of the invention, the hydrostatic continuously variable transmission device including the hydraulic pump and the hydraulic motor is provided, and the hydraulic pump is changed to a variable capacity type that can be steplessly shifted between the forward transmission state and the reverse transmission state. It is configured to operate the hydraulic pump by configuring the hydraulic motor to be a variable displacement type that can be operated at high speed for mobile traveling, medium speed for standard, and low speed for lodging to harvest cereals that are violently falling The shift lever includes a shift lever that is artificially operated, an actuator that operates a hydraulic motor, and a shift switch that operates the actuator and is manually operated.

In the second aspect of the invention, in the configuration of the first aspect of the invention , a hydraulic pump, a hydraulic motor, and a transmission case are arranged in series in the working transmission system that transmits the driving force from the engine to the pre-cutting processing unit. Thus, the driving force of the output shaft of the hydraulic motor is transmitted to the work output shaft of the transmission case, and the driving force of the work output shaft is transmitted to the input shaft of the pre-cutting processing unit.

Hereinafter, reference embodiments for clarifying the present invention will be described with reference to FIGS. 1 to 9, and embodiments of the present invention will be described with reference to FIG. 10.
(Reference form)
As shown in FIG. 1, a pre-cutting processing unit 4 is provided at a front portion of a body frame 3 of a self-propelled aircraft including a pair of left and right crawler type traveling devices 1 and a riding type driving unit having a driver's seat 2. The base of the pretreatment unit frame 4a is connected to be pivotable about the horizontal axis of the machine body, and a lift cylinder 5 is interlocked with the pretreatment unit frame 4a. A combine is configured.

  This combine harvests grains such as rice and wheat, and when the lift cylinder 5 is operated, the lift cylinder 5 swings the pretreatment unit frame 4a up and down with respect to the body frame 3. The pre-cutting processing unit 4 is raised and moved up and down to a lowering work state in which the lower part of the device 4b is located near the ground and a raising non-working state in which the raising device 4b is raised above the ground. When the pre-cutting processing unit 4 is in the descending work state and the self-propelled machine is traveling, the pre-cutting processing unit 4 raises the planted culm and raises it by the device 4b and supplies it to the clipper type cutting device 4c. The harvested cereals are conveyed toward the rear of the machine body by the conveying device 4d and supplied to the start end of the threshing feed chain 6a of the threshing device 6. The threshing device 6 feeds the tip side to the handling room (not shown) while carrying the stock side of the harvested cereal rice cake to the rear side of the machine body by the threshing feed chain 6a, and performs the threshing process. The grain tank 7 collects and stores the threshing grains from the threshing device 6.

An engine 8 is provided below the driver's seat 2 of the self-propelled machine body, a transmission system for transmitting the driving force of the engine 8 to the left and right traveling devices 1, 1, and a preprocessing unit 4 for cutting the driving force of the engine 8. The work transmission system for transmitting to the system is configured as shown in FIG.
That is, the traveling transmission system transmits the driving force of the output shaft 8a of the engine 8 to the input shaft 11 of the main transmission 10 using the transmission belt 9, and the driving force of the output shaft 12 of the main transmission 10 is transmitted. The transmission is transmitted to the mission case 20 and is transmitted to the pair of left and right steering clutches 21 via a gear type reduction mechanism (not shown) inside the mission case 20, and the rotational output of the left steering clutch 21 is transmitted to the mission case 20. Is output from the left lateral side and transmitted to the crawler drive sprocket 1a of the left traveling device 1, and the rotational output of the right steering clutch 21 is output from the right lateral side of the mission case 20 to be crawler of the right traveling device 1. It is configured to transmit to the drive sprocket 1a.
The work transmission system transmits the drive force of the output shaft 12 of the main transmission 10 to the work output shaft 22 of the transmission case 20, and uses the drive belt 23 to drive the drive force of the work output shaft 22. It is configured to transmit to the input shaft 4 e of the pre-cutting processing unit 4.

The main transmission 10 is an axial plunger type and variable displacement type hydraulic pump 13 configured such that a cylinder block (not shown) is driven by the input shaft 11, and pressure oil from the hydraulic pump 13. And an axial plunger type hydraulic motor 14 that is driven by the output shaft 12 and outputs from the output shaft 12 to form a hydrostatic continuously variable transmission.
That is, when the swash plate angle of the hydraulic pump 13 is changed, the forward drive state in which the driving force from the engine 8 is converted into the forward driving force and transmitted to the left and right traveling devices 1, 1, Is converted into a reverse drive force and transmitted to the left and right traveling devices 1, 1, and a reverse transmission state in which driving of the hydraulic motor 14 is stopped and transmission to the left and right traveling devices 1, 1 is cut off. It is designed to switch. In both the forward transmission state and the reverse transmission state, the driving force from the engine 8 is steplessly changed and transmitted to the left and right traveling devices 1, 1.

  The hydraulic motor 14 constituting the main transmission 10 is configured as a variable displacement hydraulic motor having a capacity of one or more times the capacity of the hydraulic pump 13. As a result, the hydraulic motor 14 is a sub-transmission device provided in the traveling transmission system in a state where the hydraulic motor 14 is arranged in series with the main transmission device 10, and an operation of changing the swash plate angle of the hydraulic motor 14 is performed. As a result, the driving force from the engine 8 is sub-shifted and transmitted to the left and right traveling apparatuses 1 and 1.

  As shown in FIG. 2, an electric main transmission motor 25 is interlocked with a swash plate operating shaft (not shown) of the hydraulic pump 13 of the main transmission 10, and the main transmission 10 is shifted by the main transmission motor 25. An electric sub-transmission motor 26 is interlocked with a swash plate operating shaft (not shown) of the hydraulic motor 14, and the sub-transmission motor 26 is operated to change the speed of the hydraulic motor 14. It is. As shown in FIG. 4, the main transmission motor 25 and the auxiliary transmission motor 26 are linked to the transmission control means 27.

  As shown in FIG. 3, a main speed change lever 32 configured to be guided by a guide groove 31 of a lever guide 30 and to be swung in the longitudinal direction of the fuselage is laterally laterally of a driver seat 2 of the driving section. A plurality of sub-transmission means 33, 34, 35 and one main / sub-transmission mode selection means 36 disposed on the lever guide 30 are provided near the side of the lever 32. As shown in FIG. 4, the lever position detecting means 37 for detecting the main transmission lever 32, the auxiliary transmission means 33, 34, 35 and the main auxiliary transmission mode selection means 36 are also linked to the transmission control means 27. I'm allowed. The main transmission sensor 38 that detects the shift state of the main transmission 10 based on the operation position of the swash plate operation shaft of the hydraulic pump 13 and the shift of the hydraulic motor 14 based on the operation position of the swash plate operation shaft of the hydraulic motor 14. A sub shift sensor 39 for detecting the state is also linked to the shift control means 27. An engine speed sensor 40 that detects the output speed of the engine 8 and a speed sensor 41 that detects the drive speed of the traveling device 1 are linked to the speed change control means 27.

  The lever position detecting means 37 is constituted by a potentiometer having an operation unit linked to the main transmission lever 32, and the main transmission lever 32 operates a neutral position N for operating the main transmission 10 in a neutral state, and the main transmission 10 It is detected which operating position and operating range of the forward range F for operating in the forward transmission state and the reverse range R for operating the main transmission 10 in the reverse transmission state. It is detected which operating position in the reverse range R is operated, and the detection result is output as an electric signal to the shift control means 27.

  The main / sub shift mode selection means 36 is composed of a push button type mode selection switch, and outputs a main / sub shift mode command to the shift control means 27 when pressed.

  The plurality of sub-transmission means 33, 34, and 35 are formed of push-button sub-transmission switches, and each sub-transmission means 33, 34, and 35 are operated to push a sub-transmission mode command by the shift control means 27. Output to. Further, when the high-speed sub-transmission means 33 among the plurality of sub-transmission means 33, 34, 35 is pushed, the hydraulic motor 14 is switched to a high-speed sub-transmission state in addition to the sub-transmission mode command. A high-speed sub-shift command is also output to the shift control means 27 for operation. When the standard sub-transmission unit 24 among the plurality of sub-transmission units 33, 34, and 35 is pushed, in addition to the sub-transmission mode command, the hydraulic motor 14 is switched to a medium-speed sub-transmission state. A medium speed sub-shift command to be executed is also output to the shift control means 27. Of the plurality of sub-transmission units 33, 34, 35, when the sub-transmission unit 35 for lying down is pushed, the hydraulic motor 14 is switched to a low-speed sub-transmission state in addition to the sub-transmission mode command. A power low speed sub-shift command is also output to the shift control means 27.

  The shift control means 27 is made up of a microcomputer, and is based on the information from the main / sub shift mode selection means 36, the auxiliary shift means 33, 34, 35, and the lever position detection means 37 as shown in FIG. It operates as shown in FIG.

  That is, as shown in FIG. 5, when the main / sub shift mode command is input from the main / sub shift mode selection unit 36, the shift control unit 27 switches to the main / sub shift control mode and executes the main / sub shift control. As shown in FIG. 7, it is determined whether or not the main transmission lever 32 has been operated based on information detected by the lever position detection unit 37, and if it is determined that the main transmission lever 32 has been operated, detection by the lever position detection unit 37 is performed. Based on the information, the main transmission motor 25 is driven until the main transmission 10 is determined to be in the control target shift state based on information detected by the main transmission sensor 38, and the main transmission 10 is operated by the main transmission lever 32. Shift operation is performed to a shift state corresponding to the position. Further, based on the detection information by the lever position detection means 37, the sub-transmission motor 26 is driven until it is determined that the hydraulic motor 14 is in the control target sub-shift state based on the detection information by the sub-transmission sensor 39. 14 is shifted to a sub-shift state corresponding to the operation position of the main shift lever 32. More specifically, the speed change operation of the hydraulic motor 14 will be described. As shown in FIG. 9, when the main speed change lever 32 is operated to the low speed portion of the forward range F or the reverse range R, the hydraulic motor 14 is moved to the low speed sub-shift. When the main speed change lever 32 is operated to the middle speed portion of the forward range F or the reverse range R, the hydraulic motor 14 is changed to the medium speed sub-shift state, and the main speed change lever 32 is When operated to the high speed portion of the forward range F or the reverse range R, the hydraulic motor 14 is shifted to a high speed sub-shift state.

  As shown in FIG. 5, when the sub-transmission mode command is input from the sub-transmission units 33, 34, 35, the shift control unit 27 switches to the sub-transmission control mode, and executes the main transmission control and the sub-transmission control. As shown in FIG. 6, it is determined whether or not the main transmission lever 32 has been operated based on information detected by the lever position detection unit 37, and if it is determined that the main transmission lever 32 has been operated, detection by the lever position detection unit 37 is performed. Based on the information, the main transmission motor 25 is driven until the main transmission 10 is determined to be in the control target shift state based on information detected by the main transmission sensor 38, and the main transmission 10 is operated by the main transmission lever 32. Shift operation is performed to a shift state corresponding to the position. Further, as shown in steps 1 to 4 of FIG. 8, when a high-speed sub-transmission command is input from the high-speed sub-transmission means 33, the hydraulic pressure is determined based on information detected by the sub-transmission sensor 39 based on the high-speed sub-transmission command. The sub-transmission motor 26 is driven until it is determined that the motor 14 is in the control target sub-shift state, and the hydraulic motor 14 is shifted to a high-speed shift state corresponding to the high-speed sub-shift command. As shown in steps 5 to 7 of FIG. 8, when a medium speed sub-shift command is input from the standard sub-transmission means 34, the hydraulic pressure is determined based on information detected by the sub-speed sensor 39 based on the medium speed sub-shift command. The sub-transmission motor 26 is driven until it is determined that the motor 14 is in the control target sub-transmission state, and the hydraulic motor 14 is shifted to a medium-speed sub-transmission state corresponding to the medium-speed sub-transmission command. As shown in steps 8 to 10 of FIG. 8, when a low-speed sub-shift command is input from the sub-transmission means 35 for lodging, the hydraulic motor 14 is based on information detected by the sub-shift sensor 39 based on this low-speed sub-shift command. Until the control target sub-shift state is determined, the sub-transmission motor 26 is driven to shift the hydraulic motor 14 to a low-speed sub-shift state corresponding to the low-speed sub-shift command.

  The shift control means 27 calculates the driving load of the traveling device 1 based on the engine speed detected by the engine rotation sensor 40 and the detection speed detected by the speed sensor 41, and whether the calculated driving load has become a load greater than a set value. If it is determined that the calculation drive load has exceeded the set value, the auxiliary transmission motor 26 is prioritized over the detection information from the lever position detection means 37 and the auxiliary transmission commands from the auxiliary transmission means 33 and 35. The hydraulic motor 14 is shifted to a low-speed sub-shift state regardless of the operation position where the main shift lever 32 is operated and regardless of the high-speed or medium-speed sub-shift command.

  In other words, the main / sub transmission mode selection means 36 is pushed to perform normal work travel such as harvesting cereals that are not overly laid down. Then, the shift control means 27 is switched to the main / sub shift control mode for the main / sub shift mode command output by the main / sub shift mode selection means 36, and the shift control means 27 detects the information detected by the lever position detection means 37. Based on this, the main transmission motor 25 and the sub-transmission motor 26 are operated to switch the main transmission 10 and the hydraulic motor 14 to a shift state corresponding to the operation position of the main transmission lever 32, and the main transmission lever 32 is operated. The main transmission 10 is changed in a stepless manner to change the driving speed of the traveling device 1 and the hydraulic motor 14 is switched to a low, medium, and high speed three-stage sub-shift state. The vehicle can travel while performing sub-shifts that change the driving speed of the device 1 at once.

  When traveling, or during work traveling such as harvesting cereals that are heavily laid down, a predetermined sub-transmission means 33, 34, 35 is selected from a plurality of sub-transmission means 33, 34, 35 and pushed. Then, the shift control means 27 switches to the sub shift control mode for the sub shift command output by the pushed sub shift means 33, 34, 35, and the shift control means 27 detects the information detected by the lever position detection means 37. Based on this, the main transmission motor 25 is operated to switch the main transmission 10 to a shift state corresponding to the operation position of the main transmission lever 32. At the same time, the transmission control means 27 operates the auxiliary transmission motor 26 with priority over the detection information from the lever position detection means 37 based on the auxiliary transmission commands from the auxiliary transmission means 33, 34, 35, and operates the auxiliary hydraulic motor 14. When the high-speed sub-transmission means 33 is operated, the standard sub-transmission means 34 is fixed while fixing the hydraulic motor 14 to the high-speed sub-transmission state. Is operated while the hydraulic motor 14 is fixed to the medium speed sub-shift state, and when the sub-transmission means 35 for lodging is operated, the hydraulic motor 14 is fixed to the low-speed sub shift state. In any case, it is possible to travel while changing the drive speed of the traveling device 1 by changing the driving speed of the traveling device 1 steplessly with the main transmission lever 32.

  In addition, when the driving load of the traveling device 1 becomes a set value or more, such as when the pair of left and right steering clutches 21 and 21 are operated to turn the aircraft, regardless of the operation position of the main transmission lever 32 at this time, In addition, regardless of the high-speed sub-transmission command from the sub-transmission unit 33 or the medium-speed sub-transmission command from the sub-transmission unit 34, the shift control unit 27 switches the hydraulic motor 14 to the low-speed sub-transmission state. The vehicle can travel while suppressing an increase in the load on the engine 8 caused by an increase in the driving load of 1.

Hereinafter, embodiments of the present invention will be described. In this case, in the embodiment of the present invention, portions different from the above-described reference embodiment are described, and other portions are the same as the above-described reference embodiment.
(Embodiment of the present invention)
Figure 10 (a) shows a traveling speed change operation apparatus having a operation section structure, with the operation section structure of the travel gear operating device, one of the auxiliary transmission to the grip portion 32a of the main shift lever 32 Means 42 are provided.
The sub-transmission means 42 is composed of a push button type sub-transmission switch, and outputs a sub-transmission mode command and a sub-transmission command to the shift control means 27 when pressed. Further, the sub-transmission means 42 sequentially switches the sub-shift command to the high-speed sub-shift command, the medium-speed sub-shift command, and the low-speed sub-shift command each time it is pushed as shown in FIG. It is like that.

[Another embodiment]
The main transmission lever 32 is linked to the swash plate operating shaft of the hydraulic pump 13 of the main transmission 10 via the lever position detection means 37, the transmission control means 27, and the main transmission motor 25 as in the above embodiment. In addition to being configured to enable the shifting operation of the main transmission 10 by 32, it may be configured as shown in FIG. In other words, the main transmission lever 32 can be operated to shift the main transmission 10 by the main transmission lever 32 by interlocking the main transmission lever 32 with the swash plate operation shaft of the hydraulic pump 13 of the main transmission 10 by mechanical interlocking means using a link. In this case, the object of the present invention can be achieved.

  The object of the present invention can also be achieved by adopting a cylinder, a solenoid or the like instead of the auxiliary transmission motor 26 and switching the auxiliary transmission state of the hydraulic motor 14 by these. Accordingly, the auxiliary transmission motor 26, the cylinder, the solenoid, and the like are collectively referred to as the auxiliary transmission actuator 26.

In addition to the combine, the present invention can also be applied to a traveling speed change operation device installed in a vehicle that performs various operations such as a tractor and a lawn mower. Therefore, these combine, tractor, lawn mower and the like are collectively referred to as a work vehicle.

Side view of the entire reference combine Reference system transmission system diagram Plan view of the arrangement of the main transmission lever and auxiliary transmission means of the reference form Block diagram of shift control of reference form Flow chart of reference form shift control Flow chart of reference form shift control Flow chart of reference form shift control Flow chart of reference form shift control Explanatory drawing which shows the relationship between the operation position of the main transmission lever of a reference form , a transmission control mode, and the transmission state of a hydraulic motor. (A) is a side view showing the arrangement portion of the auxiliary transmission means of the embodiment of the present invention , (B) is an explanatory diagram showing the output of the auxiliary transmission command of the auxiliary transmission means Explanatory drawing which shows the main transmission lever linkage structure provided with another embodiment.

4 mowing pre-processing section
4e Input shaft
8 Engine 10 Hydrostatic continuously variable transmission
12 Output shaft 13 Hydraulic pump 14 Hydraulic motor
20 mission case
22 Work output shaft 26 Actuator 32 Shift lever 42 Shift switch

Claims (2)

A hydrostatic continuously variable transmission equipped with a hydraulic pump and a hydraulic motor;
The hydraulic pump is configured in a variable displacement type that is variable steplessly in a forward transmission state and a reverse transmission state,
The hydraulic motor is configured in a variable capacity type that can be operated at a high speed for traveling, a medium speed for standard use, and a low speed for lodging to harvest cereals that are severely laid down ,
A shift lever that is operated manually by the hydraulic pump;
An actuator for operating the hydraulic motor, and a shift switch for manually operating the actuator to operate the actuator,
A combine having the shift switch on the shift lever . In the working transmission system that transmits the driving force from the engine to the pre-cutting processing unit, the hydraulic pump, the hydraulic motor, and the transmission case are arranged in series,
The driving force of the output shaft of the hydraulic motor is transmitted to the work output shaft of the transmission case, and the driving force of the work output shaft is transmitted to the input shaft of the pre-cutting processing unit. The combine according to 1.

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