JPH0756615B2 - 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 for speed change transmissions such as combine and tractor.

[Prior art]

Conventionally, there has been a demand for a traveling operating device for a mobile agricultural machine that has a minimal number of operating levers to facilitate a simple and easy operation and reduce operational errors. For example, Jikkou 55-
The device disclosed in Japanese Patent No. 8030 has a structure in which the clutch can be engaged and disengaged and a gear shift operation can be performed by operating a single gear shift clutch lever.

[Problems to be Solved by the Invention]

With the increase in the number of elderly and female operators in recent years, traveling control devices for mobile agricultural machines are required to ensure safety and be easy to operate. For example, for traveling systems, it is strongly desired to install a series of devices together, and this is effective both in terms of configuration and operation. Moreover, it is desirable that the number of each of these operation levers is reduced as much as possible, and if possible, various types of operations can be performed by a mono lever. However, when the main clutch shifts the transmission on the lower transmission side, or when the braking operation is performed,
It is necessary to cut off the transmission, and how to rationally configure this complicated operation system to make the operation easier and safer is an issue. Means for Solving the Problems The present invention takes the following technical means in order to solve the above-mentioned problems. That is, the traveling device 1
To the speed change transmission device 2 for transmitting rotational power from the prime mover 16 to the work output pulley 86 for driving the speed change transmission device 2 and the work device, and a transmission belt of the belt transmission device. Is provided on the speed change lever 3, a main clutch disengagement switching means of the main clutch 4 for switching the power between interruption and continuation by tension and relaxation of the power transmission, a speed change lever 3 for performing a speed change operation of the speed change transmission device 2 in a plurality of steps. An operation switch 6 for switching the main clutch on / off switching means,
The locking device 5 for positioning the speed change lever 3 at a plurality of speed change operation positions, and the speed change lever 3 in the locking device 5 in relation to the operation of the main clutch on / off switching means to the disengagement side of the main clutch 4. Release cooperation means for releasing the lock of
A steering brake 7 for braking the traveling device 1 which is provided in a traveling transmission path inside a traveling transmission case 17 having the speed change transmission device 2 installed therein, a brake operating means for operating the steering brake 7, and A traveling operating device for a mobile agricultural machine comprising: a main clutch-related operating means for switching the main clutch connecting / disconnecting switching means to a disengaged state in relation to the operation of the brake operating means to the braking position.

【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. Then, as shown in FIG. 3, 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 part to the lower part.
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. Then, by fitting the clip cams 26, 26 on the base end side of the shift keys 25, 25 into the clip grooves 22, 22, ..., The shift pawls 27, 27 on the tip side are shifted from the shift shaft 19. The clip cams 26, 2
By sliding 6 on the mountain portion between the clip grooves 22 and 22, the speed change pawls 27 and 27 can be swung to the axial center side,
The clip groove 22 at the shift position and the shift claws 27, 27 are engaged / disengaged. 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. In addition, the transmission gear 21
An annular groove 30, 30 is provided on the inner peripheral portion of the gear, and when the speed change pawls 27, 27 are fitted into the groove 30, 30, the gear is in a neutral state in which the speed change transmission is not performed. A plurality of groups of input gears 23 are fixed to the input shaft 18. It directly meshes with the left side portion of the input gear 23 group, each forward side transmission gear group 20 located on the left side of the transmission shaft 19 side, and the right side portion of the input gear 23 group and the right side portion of the transmission shaft 19 side. Each group of speed change gears 20 on the reverse drive side is configured to be indirectly meshed and transmitted via a rotatable gear 34 on an output shaft 31. A work output pulley 86 that transmits power to the input pulley 35 and the reaping and conveying device (not shown) is provided at the shaft end of the input shaft 18. 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. Next, the main clutch on / off switching means will be described. The main clutch 4 is provided with a tension arm 46 integrally with one end of a rotatable shaft 45.
A tension arm 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. When the speed change lever 3 is located at the neutral position, the transmission gear 21 has the annular grooves 30, 30.
The shift claws 27, 27 of the shift keys 25, 25 are fitted in. 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 return spring 48 discharges the pressure oil from the hydraulic cylinder 51, the tension arm 46 is rotated downward, and the main clutch 4 is put in the engaged state. Next, a locking device 5 that locks the shift lever 3 at each shift position.
Will be described. A lock plate 60 integral with the gear shift lever 3 is provided on the support shaft 53 of the gear 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. In addition, the upper end of the restraint hook 64 is rotatably supported by the pin 62 on the machine body, and the lower end of the restraint hook 64 is
A roller 63 is provided. The restraint hook 64 has a U-shaped cross section, and the front end portion of the lock plate 60 can be fitted into the U-shaped portion of the restraint hook 64. 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.
The locking pin 66 is selectively engaged with the shift lever 3
The positioning is performed at each gear shift operation position. The locking device 5 is provided with the lock plate 60 corresponding to each shift position by operating the shift lever 3 to each shift position.
The engaging pin 61 of the restraining hook 64 is engaged with the engaging groove 61 of. 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. Further, a clutch lock device 9 is provided which maintains the disengaged state of the main clutch 4 even when the operation switch 6 is turned off when the shift lever 3 is operated to shift to the neutral position. Next, the clutch lock device 9 will be described. Engagement groove 61 for locking the neutral shift position system of the lock plate 60
A notch groove 79 is provided in a portion of the lock plate 60 close to the support shaft 53, and a lock plate 82 is axially supported around the vertical axis on one side surface of the lock plate 60. The lock plate 82 is bent at its tip end side in plan view. When the lock plate 82 is rotated about the vertical axis, the tip side of the lock plate 82 is rotated from the notch groove 79 to the protruding side or the retreating side. When the tip end side of the lock plate 82 projects from the notch groove 79, the lock pin 85 on the clutch arm 49 side becomes engageable, and when the tip end side of the lock plate 82 retracts from the notch groove 79, the clutch arm 49
The lock pin 85 on the side is disengaged. In addition, the lock plate 82 has a lock plate 60 on the front end side.
A spring 83 is provided for urging the cutout groove 79 so as to project from the cutout groove 79. A release lever 84 is connected to the other end of the lock plate 82 via a wire so that the lock plate 82 can be operated to the retracted side. With this structure, when the clutch arm 49 rotates counterclockwise with the tip end side of the lock plate 82 in the protruding state, the lock pin 85 on the clutch arm 49 side causes the lock plate 82 to move.
When the lock pin 85 moves past the lock plate 82, the lock plate 82 springs when the lock pin 85 passes by while rotating in contact with the bending surface on the tip side of the lock pin, and rotating in the same direction while retracting the tip side from the notch groove 79 against the spring 83. It is rotated back to the protruding side by 83. Then, the lock pin 85 is brought into the engageable state from the engagement groove 61 side to the tip of the lock plate 82 which has returned and rotated, the clockwise rotation of the clutch arm 49 is stopped, and the main clutch 4 is disengaged. It is configured to maintain. 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. 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 and the operation switch 6 is turned on and then turned off, the clutch arm 49 is locked in the clutch disengaged position by the clutch lock device 9, The 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 to, for example, the second gear speed. In the disengaged state of the main clutch 4, the engagement device 5 is released by the clutch arm 49, the shift lever 3 is in a state in which it can be freely operated, and the shift lever can be operated in the second 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. . Then turn off the operation switch 6.
When 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, the tension arm 46 rotates in the direction opposite to the arrow, and the tension pulley 47 is pressed and transmitted. Belt tightened, main clutch 4
Comes in. 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. In the engagement grooves 29, 29 on the inner peripheral side of
7,27 are engaged. 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 locking 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. 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 operation is performed to the neutral position so that the gear shift lever 3 is locked by the locking device 5. Positioned on neutral operating device. 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, the bent portion of the lock plate 82 on the tip side is retracted, and the clutch lock device 9 is released. . Then, the clutch arm 49 and the tension arm 46 rotate in the direction opposite to the arrow, and the main clutch 4
Is entered, power is transmitted from the drive pulley 44 of the prime mover 16 to the input pulley 35, the work output pulley 86 is driven, and the reaper 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, the previous rotation of the bell crank 69 causes the parking arm 43 to rotate via the brake lot 73 to brake the steering brake 7 in the travel transmission case 17 to bring the traveling device 1 into a stopped state. 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. Another embodiment shown in FIG. 4 will be described below. In this embodiment, a locking pin 66 is provided at the tip of the clutch arm 49. A tension arm and a clutch arm 49 are integrally formed to be rotatable about a support shaft 45. A hydraulic cylinder 51 is provided between the clutch arm 49 and the chassis 13 and the clutch arm 49 has A spring 43 is provided which presses the tension pulley 47 and urges the main clutch 4 in the engaged state. Further, when the main clutch 4 is in the engaged state, the locking pin engaged with the engaging groove 61 of the lock plate 60.
66 is provided at the tip of the clutch arm 49. Further, when the speed change transmission device 2 is in the neutral device, the lock plate 60 is provided with a locking piece 81 which is engaged with the locking pin 80 provided on the clutch arm 49 thereof and determines the neutral operation position of the speed change lever 3. . Then, when the operation switch 6 of the speed change lever 3 is turned on, the electromagnetic valve 78 is switched, pressure oil is sent to the hydraulic cylinder 51 to extend, and the clutch arm 49 rotates in the direction of the arrow to move the main shaft. The clutch 4 is disengaged, the engagement pin 66 is disengaged from the engagement groove 61 of the lock plate 60, and the gear shift lever 3 performs a gear shift operation to a predetermined gear shift position. When the operation switch 6 is turned off after the shifting operation is completed,
The clutch arm 49 is rotated by the spring 43 in the direction opposite to the arrow and returned to the original position, and the locking pin 66 is engaged with the engaging groove 61 corresponding to the gear shift operation position of the gear shift lever 3.
It is possible to change the gear position of the tension arm 46
Is rotated downward, the main clutch 4 is engaged, power is transmitted from the drive pulley 44 of the prime mover 16 to the input pulley 35 via the transmission belt, and the traveling device 1 is driven by this gear ratio. When the operation switch 6 of the speed change lever 3 is turned on to perform a speed change operation to the neutral position, the locking pin 80 of the clutch arm 49 is engaged with the locking piece 81 of the lock plate 60, and the speed change lever 3 is neutrally operated. Locked in position and main clutch 4
Is kept cut. In this embodiment, since the engaging groove 61 of the lock plate 60 provided on the speed change lever 3 indicates the clutch arm 49 and the tension arm 46 via the locking pin 66, the above-mentioned embodiment is used. The restraint hook 64 can be omitted, and the configuration can be simplified.

[Advantageous effects of the invention]

As described above, according to the present invention, when the operation switch 6 of the shift lever 3 is turned on, the main clutch 4 is disengaged and the locking device 5 positioned at each shift operation position of the shift lever. The lock is released, the gear shift operation is performed by the gear shift lever 3, and the operation switch 6 is set to OF
When set to F, the main clutch 4 is engaged and the gearshift lever 3
Is positioned and locked by the locking device 5 at the gear shift position where the gear shift operation is performed, and is transmitted to the gear shift transmission 2 to drive the traveling device 1 at this gear ratio. Then, the steering brake 7 can brake the traveling device 1 by moving the clutch gear 39 of the speed change transmission device 2 further outward from the position where the traveling clutch is disengaged. According to the present invention, when the shift operation is performed, the main clutch 4 can be easily disengaged by operating the operation switch 6 provided on the shift lever 3 in advance. Therefore, the shift gear in the shift transmission 2 is damaged. When the steering brake 7 is operated as a parking brake, the main clutch 4 is disengaged in association with the operation of the steering brake 7. At this time, since the main clutch 4 is disengaged without turning on the operation switch 6, the stop operation does not become confused, and an emergency stop can be made easily and surely while ensuring safety.

[Brief description of drawings]

FIG. 1 is a side view of an essential part of an embodiment of the present invention.

FIG. 2 is a front view of a main part of the embodiment of the present invention.

FIG. 3 is a front sectional view of a traveling transmission case that is an embodiment of the present invention.

FIG. 4 is a side view of another embodiment of the present invention.

[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

 ─────────────────────────────────────────────────── ─── Continuation of the front page Judgment panel Judge's chair Judge Kajisawa Judge Ueno Tadayoshi Judge Ogura Masayuki (56) Reference JP 61-262256 (JP, A) U) Actual development Sho 58-81624 (JP, U) Actual public Sho 58-55467 (JP, Y2)

Claims (1)

[Claims] 1. A speed change transmission device 2 for speed-changing and transmitting rotational power to a traveling device 1, and a belt transmission device for transmitting power from a prime mover 16 to the speed change transmission device 2 and a work output pulley 86 for driving a work device. A main clutch on / off switching means of a main clutch 4 for switching the power between interruption and continuation by tensioning / relaxing a transmission belt of the belt transmission, a speed change lever 3 for changing the speed change transmission 2 in a plurality of steps, Speed change lever 3
An operation switch 6 for switching the main clutch on / off switching means, a locking device 5 for positioning the speed change lever 3 at a plurality of shift operation positions, and a main clutch 4 of the main clutch on / off switching means. Provided in a traveling power transmission path in a traveling power transmission case 17 in which the speed change transmission device 2 is installed, and a release linkage means for releasing the locking of the speed change lever 3 in the locking device 5 in relation to the operation to the cut side. In addition, the steering brake 7 for braking the traveling device 1, the brake operating means for operating the steering brake 7, and the main clutch disengagement switching means are disengaged in association with the operation of the brake operating means to the braking position. A traveling operating device for a mobile agricultural machine, comprising: a main clutch-related operating means for switching to a state.