JPH0784145B2 - Traveling operation device for mobile agricultural machinery - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

This invention relates to a traveling operating device for a mobile agricultural machine,
It can be used as a speed change transmission for transmitting traveling devices such as combine and tractor.

[Prior art]

A gear shift lever for shifting the speed change gear of the traveling device is provided with a switch, and by operating the switch, a speed change transmission device for the traveling device and a work device driving device such as a combine harvester or a threshing device are driven. In a mobile agricultural machine configured to turn on and off the main clutch that is transmitted to the power take-off shaft, the main clutch is turned off by turning this switch on when the switch is turned off when the shift lever is in the neutral position. The main clutch is engaged, power is transmitted to the speed change transmission device and the power take-off shaft, and the working device is driven.

[Problems to be Solved by the Invention]

In view of this, the present invention maintains the main clutch in the disengaged state when the gearshift lever is in the neutral position, even if the gearshift lever is turned off, and cuts off the transmission of power to the gearshift transmission and the work device. Also, an object of the present invention is to improve the operability and workability by providing a clutch lock device capable of transmitting power only to the working device even if the speed change lever is in the neutral position. And

[Means for Solving the Problems]

The present invention takes the following technical means in order to solve the above problems. That is, prime mover 16
From a traveling gear 1 to a traveling device 1 and a belt transmission device for transmitting power to a power transmission shaft 8 for driving a working device and a power transmission shaft 8 for driving a working device; , A main clutch 4 for switching between interruption and continuation, a clutch disengagement switching means for switching the main clutch 4 between interruption and continuation, a shift lever 3 for shifting the shift transmission 2 in a plurality of stages, and the shift lever 3 An operation switch 6 for switching the clutch on / off switching means in the main clutch 4, a locking device 5 for positioning the shift lever 3 at a plurality of shift operation positions, and the clutch on / off switching means. Main clutch 4
Associated with the actuation of the shift lever 3 to the cut side, the release linkage means for releasing the lock of the shift lever 3 in the locking device 5 and the main switch cut by turning on the operation switch 6 at the neutral position N of the shift lever 3 The traveling operation device for a mobile agricultural machine comprises a clutch lock device 9 for keeping the clutch 4 in the disengaged state as it is, and a release lever 84 for releasing the disengaged state of the main clutch 4 of the clutch lock device 9.

[Operation of the invention]

When the operation switch 6 of the speed change lever 3 is turned on, the main clutch 4 is disengaged, and the speed change transmission device 2 to the traveling device 1 is turned on.
The input transmission to the power take-off shaft 8 for driving the working device is cut off, the locking of the speed change lever 3 by the locking device 5 is released, and the speed change transmission device 2 by the speed change lever 3 becomes ready for shifting. Shift to the desired shift position. Further, when the operation switch 6 of the gear shift lever 3 is turned off, the main clutch 4 is put into the engaged state, and the main clutch 4 is attached to the gear shift transmission 2.
Is transmitted from the vehicle, and the traveling device 1 is driven to be driven based on the gear ratio operated by the gear shift operation, and the power takeoff shaft 8 is also driven to transmit the power to the working device. When the operation switch 6 of the speed change lever 3 is turned on and the main clutch 4 is disengaged, the input power transmission to the speed change transmission device 2 to the traveling device 1 and the power take-off shaft 8 for driving the working device is cut off. The locking of the speed change lever 3 by the locking device 5 is released, the speed change transmission device 2 by the speed change lever 3 is made variable, and the clutch lock is associated with the operation of the clutch on / off switching means of the main clutch 4. The device 9 is switched to the lock side. Next, after operating the speed change lever 3 to the neutral position N, when the operation switch 6 is turned off, the clutch lock device 9 is switched to the lock side, so the clutch on / off switching means is maintained in the disengaged state,
The main clutch 4 maintains the disengaged state, and maintains the state in which the transmission to the speed change transmission device 2 to the traveling device 1 and the power take-off shaft 8 for driving the work device is discontinued. Next, the release lever 84 is operated while the neutral position N of the speed change lever 3 remains in the operated state, and the clutch lock device 9 is operated.
Is released, the main clutch 4 enters the engaged state, and the power take-off shaft 8
Is transmitted only to the work equipment.

【The invention's effect】

Thus, when the speed change lever 3 is in the neutral position N,
Even if the operation switch 6 is turned off, the main clutch 4 is maintained in the disengaged state by the clutch lock device 9, the input transmission to the speed change transmission device 2 and the power take-off shaft 8 is cut off, and the speed change lever 3 When the lock state of the clutch lock device 9 is released in the operation state to the neutral position N of
Input power is transmitted only to the power take-off shaft 8. Therefore, without providing the clutch lever for turning on / off the power transmission to the power take-off shaft 8, the operation switch 6 for turning on / off the main clutch 4 provided on the speed change lever 3 for changing the speed of the speed change transmission device 2.
With this, it is possible to connect and disconnect the power to the power take-off shaft 8.
The operation is simple and reliable, and the operability is improved.

【Example】

The example shown in the figure shows a combine provided with a traveling operation device according to the present invention. On the lower part of the chassis 13, a pair of left and right traveling devices 1 and 1 are mounted, and on one front part of the upper part, a control platform and a control seat 15 are arranged, and on the chassis 13 below the control seat 15. , Equipped with a prime mover 16. In addition, a cutting and conveying device (not shown) is provided on the side of the cockpit 15 at the front of the chassis 13. The traveling device 1 is configured to be speed-change-transmitted via a speed-change transmission device 2 in a travel-transmission case 17 provided on the lower front side of the chassis 13. As shown in FIG. 5, in the traveling transmission case 17, the input shaft 18, the transmission shaft 19, the output shaft 31, the clutch shaft 32, and the pair of left and right traveling shafts 3 are arranged from the upper portion to the lower portion.
3,33 are rotatably mounted on each. The transmission shaft 19 is provided with forward gears 20 having different diameters on its left side, and reverse gears 20 on its right side so as to be rotatable. A transmission gear 21 is provided at an intermediate portion between them so as to rotate integrally with the transmission shaft 19. In addition, a clip groove is
, 22, and a key slider 24 is provided in the clip grooves 22, 22, ... so as to be slidable in the axial direction, and the key slider 24 can be moved by rotating the shift shifter 12. is there. A pair of speed change keys are provided on the inner circumference of the key slider 24.
The bases of 25, 25 are pivotally supported around pins (perpendicular to the speed change shaft 19), and clip cams 26, 26 are provided at the base ends of the speed change keys 25, 25.
And gear shift pawls 27, 27 on the tip side. In addition, the keyway is formed over the entire length of the outer peripheral surface of the transmission shaft 19.
28, 28 are formed, and the shift keys 25, 2 are formed in the key grooves 28, 28.
5 is fitted to guide slidingly in the axial direction. By the way, the shift key 25, the clip 26 on the base end side of the 25,
By fitting 26 into the clip grooves 22, 22, ..., the gear shift claws 27, 27 on the tip side can be swung outwardly away from the gear shift shaft 19, and the clip cams 26, 26 can be clipped. By slidingly contacting the mountain portion between the grooves 22 and 22, the speed change claws 27 and 27 can be swung toward the axial center side, and the clip groove 22 and the speed change claws 27 and 27 at the shift position can be engaged / disengaged. This is a configuration for performing. Further, engagement grooves 29, 29 with which the speed change claws 27, 27 are engaged are formed on the fitting surface of each speed change gear 20 with respect to the speed change shaft 19, and the speed change claws 27, 27 are engaged with the speed change gear 20. By engaging with the grooves 29, 29, one engaged transmission gear 20 is configured to rotate integrally with the transmission shaft 19. Further, annular grooves 30, 30 are provided in the inner peripheral portion of the transmission gear 21, and the grooves 3
When the speed change pawls 27, 27 are fitted in the 0, 30, a neutral state is achieved in which the speed change transmission is not performed. A plurality of groups of input gears 23 are fixed to the input shaft 18. The left side portion of the input gear 23 group directly meshes with each forward side transmission gear group 20 located on the left side of the transmission shaft 19, and the right side portion of the input gear 23 group and the right side of the transmission shaft 19 side. Each of the rearward-side shift gears 20 is configured to indirectly mesh and transmit via a rotatable gear 34 on the output shaft 31. At the shaft end of the input shaft 18, a cutting output pulley 86 that transmits power to the input pulley 35 and a cutting transfer device (not shown) is provided. The output shaft 31 is provided with a gear 36 and a gear 37 which are constantly meshed with the transmission gear 21 on the transmission shaft 19 side, and the gear 37 meshes with a center gear 38 on the clutch shaft 32 side. The clutch shaft 32 is provided with the center gear 38, and the left and right sides of the center gear 38 are provided with clutch gears 39, 39 which are axially slidable by shifters 40, 40. The clutch claw portions on both sides of the center gear 38 are provided. By engaging and disengaging the clutch gears 39, 39 with
A pair of left and right steering clutches are configured so as to turn on and off the drive transmission. The steering brakes 7, 7 are provided outside the steering clutches on the left and right sides, and the clutch gears 39, 39 are provided.
It is configured to be able to brake by moving further from the cutting position to the outside. The traveling shafts 33, 33 are provided with traveling gears 41, 41 which are constantly meshed with the clutch gears 39, 39, and the shaft ends of the traveling shafts 33, 33 have sprockets (not shown) for driving the traveling devices 1, 1 for transmission. ) Is provided. The steering brakes 7, 7 are configured so that one side of the steering brakes 7, 7 can be operated by a shifter 42 so that they can also be used as a parking brake from the outside of the traveling transmission case 17.
A parking arm 43 for activating the above is provided. As shown in FIG. 1, power is transmitted from the drive pulley 44 of the prime mover 16 via the transmission belt to the input pulley 35 of the traveling transmission case 17, and the transmission belt is tensioned or loosened. The main clutch 4 that connects and disconnects the transmission from the drive pulley 44 to the input pulley 35 is configured. The main clutch 4 is provided with a tension arm 46 integrally with one end of a rotatable shaft 45.
A tension pulley 47 is provided at the tip of the. Further, a clutch arm 49 having an L shape in a side view is provided on the rotating shaft 45 side of the tension arm 46. Tension arm 46
Is urged by the return spring 48 in the direction of pressing the transmission belt, and the tension pulley 47 tensions the transmission belt, so that the speed change transmission device 2 in the traveling transmission case 17 from the prime mover 16 is transmitted.
The input is transmitted to. Further, an arm 50 is integrally provided at the other end of the rotating shaft 45, and a tip end portion of the arm 50 and the chassis 13 are connected by a hydraulic cylinder 51 so that the hydraulic cylinder 51 is connected to the arm 50. It is configured to be extended by the supply of pressure oil, rotate the tension arm 46 upward, and disengage the main clutch 4. A clutch box 52 arranged on the side of the cockpit 15 is provided with a speed change lever 3 which is rotatable around a support shaft 53 in the front-rear direction. The shift lever 3 is movably arranged in the shift guide groove 54. As shown in FIG. 3, the shift guide groove 54 is provided with a shift groove 55 for shifting the working speed forward from the neutral position N in a straight line. The gear shift groove 56 part of the above, and the gear shift groove 57 part for the reverse drive via the bending groove to the rear side of the neutral position N
It is constructed by deviating in the direction away from 15. (Note that
When the speed change lever 3 is in the neutral position N, the speed change claws of the speed change keys 25, 25 are inserted into the annular grooves 30, 30 of the transmission gear 21.
27, 27 are fitted. ) An arm 58 is provided integrally with the gear shift lever 3 on the support shaft 53 of the gear shift lever 3, and the tip end of the arm 58 and the gear shift shifter are provided.
The arm 14 of 12 is connected via a rod 59,
The shift lever 3 is configured to be capable of shifting. An operation switch 6 is provided at the grip of the shift lever 3. The operation switch 6 and the electromagnetic valve 78 for operating the hydraulic cylinder 51 are electrically connected. When the operation switch 6 is turned on, pressure oil is sent to extend the hydraulic cylinder 51, rotate the tension arm 46 upward to disengage the main clutch 4, and turn off the operation switch 6. When it is operated to, the pressure oil is discharged from the hydraulic cylinder 51, and the tension arm 46 is rotated downward by the return spring 48 so that the main clutch 4 is put in the engaged state. A lock plate 60 is provided integrally with the shift lever 3 on the support shaft 53 of the shift lever 3 so as to project forward.
As shown in FIG. 1, the lock plate 60 is formed in a fan shape in a side view, and has a plurality of engaging grooves 61, 61, 61, 61, 61 corresponding to the number of shift stages of the shift transmission 2 at its tip. ... is provided. Also, place the upper end of the check hook 64
A checker hook 64 has a roller 63 at the lower end thereof. The check hook 64 has a U-shaped cross section, and the front portion of the lock plate 60 is provided with the check hook 64.
It is inserted in the U-shaped part of. Further, the restraint hook 64 is provided with a spring 65 for biasing the lock plate 60 to rotate. Locking pins 66 are provided between the U-shaped left and right side portions of the check hook 64, and a plurality of engagement grooves 61, 61, ... Of the fan-shaped portion of the lock plate 60 are provided.
Further, the locking pin 66 is selectively engaged to form a locking device 5 which positions the gear shift lever 3 at each gear shift operation position. Operation to the lock plate 60 corresponding to each shift position.
The engaging groove 61 is engaged with the locking pin 66 of the restraining hook 64. As shown in Figure 1, this check hook
An appropriate front-rear space is provided between 64 and the clutch arm 49 in which the main clutch 4 is engaged. A foot pedal 68 is installed on the floor below the cockpit 15.
This foot pedal is provided so that it can rotate around 67.
A bell crank 69 that rotates together with the 68 is provided. A rod 70 whose length is adjustable is provided on one side of the bell crank 69, and a pin 72 provided on the clutch arm 49 is engaged with and linked to a long hole 71 at the tip of the rod 70. Further, a brake rod 73 whose length can be adjusted is provided on the other side of the bell crank 69, and a pin 73 provided at the tip of the parking arm 43 for operating the steering brake 7 is provided in a long hole 74 at the tip of this. Are engaged and linked. Then, when the foot pedal 68 is depressed, the parking arm 43 and the clutch arm 49 are interlocked and rotated. Reference numeral 77 is a stepping back spring of the foot pedal 68. Further, the foot pedal 68 is provided with a parking lever 76 that can be operated from the front side of the machine body. 87 is a radiator. Further, at the neutral position N of the speed change lever 3, there is provided a clutch lock device 9 which maintains the disengaged state of the main clutch 4 when the operation switch 6 is turned off. The clutch lock device 9 will be described below. A notch groove 79 is formed in a portion of the engaging groove 61 provided in correspondence with the neutral shift position of the lock plate 60 near the support shaft 53.
And a lock plate 60 as shown in FIG.
A lock plate 82 is pivotally supported on one side of the shaft so as to be rotatable about the vertical axis,
The lock plate 82 is configured such that the front end side is bent in a plan view, and when the lock plate 82 is rotated, the bent portion on the front end side is rotated so as to protrude from the notch groove 79 or retract. This is the configuration. The lock plate 82 is provided with a spring 83 that biases the bent portion on the tip side in a direction in which the bent portion projects from the lock plate 60. Then, in the locked state in which the bent portion on the front end side of the lock plate 82 projects from the cutout groove 79 of the lock plate 60 as shown by the solid line, the clutch arm 49 rotates counterclockwise,
Move from the solid line position to the virtual line position in the direction of the arrow.
Then, the lock pin 85 on the side of the clutch arm 49 comes into contact with the bent portion on the tip side of the lock plate 82 to rotate from the notch groove 79 to the retreat side against the spring 83, and then the lock pin 85 is virtually moved. When passing through the bent portion as shown by the line, the lock plate 82 is returned and rotated by the spring 83 to the locked position where the solid line projects.
Then, the lock pin 85 is engaged from the engagement groove 61 side of the front side of the lock plate 82, the clockwise rotation of the clutch arm 49 is stopped, and the main clutch 4 is maintained in the disengaged state. . 84 is the lock plate 82
It is a release lever that is rotated and retracted from the notch groove 79 of the 60. When the release lever 84 is pulled in the direction of the arrow in FIG. 2, the lock plate 82 rotates through the wire against the spring 83, retracts from the notch groove 79 of the lock plate 60, and moves to the lock release position. Is. Next, the operation of the embodiment will be described. When the prime mover 16 is started and the speed change lever 3 is in the neutral position N and the operation switch 6 is turned on and then turned off, the clutch lock device 9 (the clutch arm 49, the lock plate 82, the lock pin 85, the lock plate 60). , Notched groove 79, spring 83
Etc. ), The clutch arm 49 is locked in the clutch disengaged position, the main clutch 4 is maintained in the disengaged state, and only the drive pulley 44 of the prime mover 16 rotates. Next, with the main clutch 4 disengaged, the gear shift lever 3 is operated from the neutral position N to, for example, the second gear shift. When the main clutch 4 is in the disengaged state, the clutch arm 49 releases the locking device 5 (which is composed of the lock plate 60, the engaging groove 61, the check hook 64, the locking pin 66, etc.), and the shift lever. No. 3 is in a state in which it can be freely operated, and can be operated in the second gear shift position. Then, by operating the shift lever 3 to the shift second position, the lock plate 82 on the lock plate 60 side and the lock pin 85 on the clutch arm 49 side shift in the vertical direction, and the clutch lock device 9 is switched to the release side. .
Next, when the operation switch 6 is turned off and the electromagnetic valve 78 is switched to the discharge side, the pressure oil is discharged from the hydraulic cylinder 51 and shortened by the action of the spring 48, and the tension arm 46 rotates in the direction opposite to the arrow, and the tension is increased. The pulley 47 is pressed to tension the transmission belt, and the main clutch 4 is engaged. In this state, the locking pin 66 and the engaging groove 61 of the lock plate 60 are engaged with each other, the gear shift lever 3 is locked at the second gear shift position, and the second forward gear shift gear 20 in the gear shift transmission 2 is engaged. Inner peripheral side engagement groove
The shift claws 27, 27 of the shift key 25 are engaged with 29, 29. Thus, the second forward gear input gear 23 of the input shaft 18, the second forward gear shift gear 20, the shift claw 27 of the shift key 25, the shift key 25, the shift shaft 19, the transmission gear 21, the gear 36, the output shaft 31, Gear 37, center gear 3
The power of the second forward speed is transmitted to the traveling devices 1 and 1 through the clutch gears 39 and 39, the traveling gears 41 and 41, and the traveling shafts 33 and 33, and the forward movement 2 is performed.
The traveling devices 1 and 1 are driven based on the speed change ratio. When stopping the machine, the operation switch 6 of the speed change lever 3
Turn on. Then, the electromagnetic valve 78 is switched,
The main clutch 4 is disengaged and the speed change lever 3 is moved forward 2
The lock of the locking device 5 positioned at the high speed shift position is released, the shift lever 3 becomes operable, and the shift lever 3 is moved to the neutral position N. Next, when the operation switch 6 is turned off, the main clutch 4 is maintained in the disengaged state by the clutch lock device 9 and the gear shift lever 3 is locked by the locking device 5 while the gear shift operation is performed to the neutral position. Positioned in the neutral operating position. When the speed change lever 3 is in the neutral position, the operation switch 6
Is turned off, the clutch arm 49 is made rotatable in the direction opposite to the arrow, and then the release lever 84 is pulled upward.
As shown in the figure, the bent portion on the tip side of the lock plate 82 is retracted as shown by an imaginary line, and the clutch lock device 9 is released. Then, the clutch arm 49 and the tension arm
46 rotates in the direction opposite to the arrow, the main clutch 4 enters the engaged state, power is transmitted from the drive pulley 44 of the prime mover 16 to the input pulley 35, the reaping output pulley 86 is driven, and the reaping device is transmitted. . Therefore, it is possible to drive the harvesting device, which is a working device of the combine, with the traveling devices 1 and 1 stopped. When the foot pedal 68 is depressed, the bell crank 69 is rotated in the direction of the arrow, and the rod crank 70 and pin 72
The clutch arm 49 is rotated in the arrow direction, the clutch arm 49 moves the check hook 64 in the arrow direction via the roller 63, and the locking device 5 is positioned at the gear shift position.
And the main clutch 4 is disengaged. Further, by the rotation of the bell crank 69, the parking arm 43 is rotated through the brake lot 73,
The steering brake 7 in the traveling transmission case 17 is braked, and the traveling device 1 is stopped. Further, if the parking lever 76 is operated from the front side of the machine body, braking can be performed at the time of parking via the foot pedal 68. During harvesting and threshing work of the combine, when the machine is stopped by setting the speed change lever 3 to the neutral position N, the harvesting device is stopped. In this state, the uncut grain culm is not scraped and conveyed, and the winding of the grain culm and the clogging of the conveying route can be prevented. Therefore, the worker can be separated from the machine body for the work of exchanging the grain bag, and the efficiency of the combine work can be improved. Further, in the neutral position N of the speed change lever 3, the release lever
When 84 is pulled and the clutch lock device 9 is released, the traveling devices 1 and 1 are stopped and only the harvesting device (not shown) is driven. Therefore, the grain culm remaining in the transport path is transported to perform the threshing process. Further, along with the driving of the reaping device, an oiling device (not shown) is driven to apply oil to each part, and inspection and maintenance can be performed.

[Brief description of drawings]

1 is a side view, FIG. 2 is an enlarged plan view of a part thereof, FIG. 3 is a plan view of a shift guide groove, and FIG. 4 is a cut front view. 5 and 5 are partially cut front views.

[Explanation of symbols]

1 ... travel device, 2 ... transmission transmission device, 3 ... shift lever, 4 ... main clutch, 6 ... operation switch, 7 ... steering brake 17 ... travel transmission case

Claims (1)

[Claims] 1. A speed change transmission device 2 for changing rotational power from a prime mover 16 to a traveling device 1 and a belt transmission device for transmitting power to a power take-off shaft 8 for driving a working device, and transmission of the belt transmission device. A main clutch 4 for tensioning and loosening the belt to switch the power between interruption and continuation, a clutch on-off switching means for switching the main clutch 4 between interruption and continuation, and a shift lever for shifting the shift transmission 2 in a plurality of stages. 3 and
An operation switch 6 provided on the shift lever 3 for switching the clutch connection / disconnection switching means in the main clutch 4, a locking device 5 for positioning the shift lever 3 at a plurality of shift operation positions, Releasing and linking means for releasing the lock of the speed change lever 3 in the locking device 5 in association with the operation of the clutch on / off switching means to the disengagement side of the main clutch 4, and the operation switch 6 at the neutral position N of the speed change lever 3. Travel operating device for a mobile agricultural machine comprising a clutch lock device 9 for maintaining the disengaged state of the main clutch 4 that has been disengaged by turning on the switch, and a release lever 84 for releasing the disengaged state of the main clutch 4 of the clutch lock device 9. .