JP2519031Y2 - Traveling operation device for mobile agricultural machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a traveling operating device for a hydraulic continuously variable transmission, and more specifically, a main gearshift lever and an auxiliary gearshift lever are tilted forward or backward from a neutral position. The present invention relates to a traveling operation device in a mobile agricultural machine such as a combine that shifts forward or backward.

[Problems to be solved by the prior art and the present invention]

As disclosed in Japanese Patent Laid-Open No. 61-143223 and Japanese Utility Model Laid-Open No. 58-119426, a working part (thrushing part) other than the driver's seat during so-called headland threshing work of combine work. It is already known that the auxiliary gear shift lever provided on the vehicle slightly advances the vehicle body to change the vehicle body position.

However, in the former case, when the traveling gear shift operation is performed in the cockpit, there is a gap, that is, play, between the main gear shift lever and the gear shift shaft for changing the swash plate angle, which allows movement of the sub gear shift lever. Because of this, the operation of the main speed change lever and the rotation of the speed change shaft do not correspond one-to-one when performing forward or reverse travel, the feeling of the speed change operation is poor, and the operation with the auxiliary speed change lever can only be performed at a very low speed. Is. Further, in the latter case, it is troublesome for the worker to engage and disengage the engagement piece of the sub-transmission lever and the main transmission lever while the operator is on the driver's seat, and it is difficult to drive when the sub-transmission lever is operated. In order to resist the reaction force, it is necessary to simultaneously move the main shift lever to which the braking force is applied, which causes a problem that the operation load becomes heavy.

[Means for solving the problem]

The present invention is intended to solve the above problems, and its technical means is to provide a main gearshift lever that can be fixed at an arbitrary operating position provided in a driver's seat and a hydraulic continuously variable gearshift that can rotate forward and backward. In a mobile agricultural machine in which traveling speed is changed by interlocking with a device through a connecting member, an auxiliary speed change lever is provided in a working part other than a driver's seat, and the auxiliary speed change lever is used to change the swash plate angle of the continuously variable transmission. And a release means for releasing the connection between the speed change shaft and the main speed change lever,
The releasing means is operated in conjunction with the shift operation of the auxiliary shift lever.

[Function of device]

Therefore, according to the present invention, when the main shift lever provided on the driver's seat of the mobile agricultural machine is tilted from the neutral position in the forward direction or the backward direction, the shift shaft for changing the swash plate angle is rotated to discharge the hydraulic pump. The amount can be changed to increase or decrease the traveling speed. Further, when the sub shift lever provided on a work part other than the driver's seat is operated, the releasing means is activated to disconnect the connection between the shift shaft and the main shift lever, so that the sub shift lever can freely perform the traveling shift operation. it can.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. The hydraulic continuously variable transmission 1 has a hydraulic pump 2, a hydraulic motor 3 and a swash plate angle changing speed changing shaft 4, as shown in FIGS. 10 (a), (b) and (c). And the hydraulic pump 2 has an input shaft
2a, and the hydraulic motor 3 has an output shaft 3a, and these input / output shafts 2a, 3a are provided so as to be vertically aligned. Further, the speed change shaft 4 is projected in a direction different from the input / output shafts 2a and 3a by 90 degrees, and the angle of the swash plate of the hydraulic pump 2 is changed by rotating the speed change shaft 4 left and right. Hydraulic motor 3
The amount of oil to be supplied to the hydraulic motor 3 can be changed to continuously change the rotational speed of the hydraulic motor 3.

As shown in FIG. 9, the hydraulic continuously variable transmission 1 is connected and coupled to a combine transmission 6, and the input shaft 2a of the hydraulic continuously variable transmission 1 is an input shaft 7 of the transmission 6. And the output shaft 3a are connected to the end of the drive shaft 9 of the transmission 6. The other end of the input shaft 7 protrudes out of the transmission case of the transmission 6, and a pulley 10 is fitted and fixed to that portion, and an endless belt for transmitting engine power is wound around the pulley 10. Has been.

A gear 11 is fitted to the drive shaft 9 of the transmission 6, and when the drive shaft 9 rotates, power is transmitted to the drive wheels 12 to rotate the crawlers 14. Also,
A pulley 13 with a built-in one-way clutch is attached to a portion of the drive shaft 9 projecting out of the transmission case of the transmission 6, and power is transmitted from the pulley 13 to a combine pretreatment unit.

Then, as shown in FIG. 1, a traveling operation device for rotating the speed change shaft 4 of the hydraulic continuously variable transmission 1 right and left to rotate forward and backward to continuously change the rotational speed of the hydraulic motor 3 as shown in FIG. The gear shift operating device 15 includes a main gear shift lever 70 and an auxiliary gear shift lever 60 for operating the gear shift operating device 15, and the gear shift operating device 15 is attached to the outside of the hydraulic continuously variable transmission 1.

That is, as shown in FIG. 3, the speed change bearing moving plate 16 is attached to the speed change shaft 4 having a rectangular cross section which projects from the hydraulic continuously variable transmission 1.
Is installed. As shown in FIGS. 4 (a) and 4 (b), the speed change bearing moving plate 16 is provided with stepped cutouts 16a over substantially the outer peripheral portion thereof. A stop 16c having a hole 16b is provided. Then, at a position facing the outer peripheral portion, a single groove 16d is cut from one end to a place beyond the central portion to reach the back side of the speed change bearing moving plate 16, and further, the speed change bearing moving plate 16 is cut. A rectangular hole 16e is formed in the center. Further, a screw hole 16f for a tightening bolt is drilled so as to be orthogonal to the groove 16d, and a screw hole 16g for screwing an operation arm boss 30 described later and a through hole 16h are respectively provided at two positions. .

Further, on the outside of the speed change bearing moving plate 16, there is provided a locking rod 16i for engaging with a sub speed change lever 60 which will be described later. As shown in FIG. 2, the speed change bearing moving plate 16 has its rectangular hole 16e fitted in the speed change shaft 4 and is fixed by screwing and tightening the tightening bolt 17 into the screw hole 16f for the tightening bolt. ing. Then, the cutout portion 16 in the substantially half circumferential portion of the outer peripheral portion of the speed change bearing moving plate 16
A notch block 18 having a substantially three-month shape in plan view for restricting the neutral position of the speed change shaft 4 is fitted in a, and a steel ball 19 is engaged in a notch portion 18a of the notch block 18. There is. The steel ball 19 is urged by a spring 23 in a sleeve 22 screwed onto the speed change shaft 4 of the hydraulic continuously variable transmission 1 and fixed by a lock nut 21, and the spring 23 is stopped by a stop bolt 24. Prevents slipping out. At both ends of the notch block 18, receiving members 25 are provided so as to face the stoppers 16c of the speed change bearing moving plate 16, and are pushed by being screwed into the screw holes 16b of the stoppers 16c of the speed change bearing moving plate 16. The bolt 26 causes the notch block 18 to slightly rotate in either the left or right direction. Thereby, the relevant parts of the speed change shaft 4 (the speed change bearing moving plate 16, the notch block 18, the operation arm boss 30).
Etc.) to adjust the variation due to the processing accuracy,
After the adjustment, fix with the lock nut 26a.

That is, the notch block 18 and the speed change bearing moving plate 16 are accurately adjusted to regulate the neutral position of the speed change shaft 4, that is, the position where oil does not flow from the hydraulic pump 2 to the hydraulic motor 3 is adjusted.

Further, the notch block 18 is provided with two screw holes 27 for integrally forming the speed change bearing moving plate 16 and the operation arm boss 30 and also has an eaves-shaped portion 28 which is fitted with the speed change bearing moving plate 16. Have The operation arm boss 30 has a substantially hollow cylindrical shape, and is provided on the end portion side of the speed change shaft 4 of the speed change bearing moving plate 16 at the speed change shaft 4 side.
And the operation arm boss 30
Through holes 31 in the upper two places and through holes 16h in the speed change bearing moving plate 16
The bolt 32 is inserted into the screw hole 27 of the notch block 18 after the neutral position of the speed change shaft 4 is regulated, and the bolt 32 inserted into the two through holes 31 on the lower side of the operation arm boss 30 is fixed. The speed change bearing moving plate 16 is screwed into a screw hole 16g to be integrally formed.

Bearing fitting portion 33 on the side opposite to the speed change shaft 4 of the operation arm boss 30
A bearing 34 is fitted into the shaft, and a retaining ring 35 locked in a retaining ring groove 36 is used to prevent the retaining. Further, a pin hole 38 is provided at one place from the outer peripheral portion of the operation arm boss 30 toward the center. An operation arm 39 is rotatably inserted into the outer periphery of the operation arm boss 30 and is prevented from coming out by a collar portion 37 of the operation arm boss 30. The operation arm 39 has a frame-shaped main body 39a of a substantially magnifying glass as shown in FIG. 7 (a). A pin hole 39 is formed in the handle portion of the main body 39a so that a knock pin 41 is internally provided.
b is perforated, a screw hole 39c that is screwed into the fixing nut 42 is provided at the end thereof, a bifurcated fork-shaped bracket 39d is fixed and protruded on the right side in front view, and a hole 39e is perforated at the end. ing.

Further, an L-shaped bracket 39f is fixed and protruded on the left side in front view, and a wire stopper 39g is fixedly mounted on one end thereof. In addition, a bracket 39h having a hole 39i directed downward on the left side in a front view is fixedly and projectingly provided on a ring portion of the main body 39a. Further, a grease groove 39j for enclosing grease is provided inside the ring portion of the main body 39a for reducing the rotation resistance when rotating with the operation arm boss 30. A fulcrum shaft 43 to which an arm 44 is fixed is inserted into the hole 39e of the forked fork-shaped bracket 39d, and an operating arm 45 is fixed to the other end of the fulcrum shaft 43 with a nut 46. A pin 47 is fixed to the other end of the arm 44, and an end 49a of a wire 48 fixed to a wire stopper 39g is inserted into the pin 47,
The split pin 51 prevents it from falling off. The operation arm boss 30 is urged by a return spring 50, which is inserted into a pin hole 39b formed in a grip portion of the main body 39a and is prevented from popping out by a fixing nut 42, into a long hole 52 at the other end of the operating arm 45. It is engaged with the link pin 53 at the other end of the knock pin 41 whose tip portion 41a is fitted in the pin hole 38. A cylindrical shaft 56 fixed to one end of a fulcrum bracket body 55 is inserted into the bearing 34 fitted in the bearing fitting portion 33 of the operation arm boss 30, and is locked by a retaining ring 57. At the other end of the fulcrum bracket body 55, brackets 55a, 55b having holes 55c, 55d for inserting the rotation shaft 61 together with the rotation boss 60a of the auxiliary transmission lever 60 are fixedly provided on the upper and lower sides of the support bracket 55a. A wire stopper 55e for screwing the wire 48 is fixed to the strip.

The sub-shift lever 60 has a rotating boss 60a fixed at one end,
A lever plate 60b having a long hole 60c that engages with the locking rod 16i of the speed change bearing moving plate 16, a lever rod 60d, and an end 49 at the other end of the wire 48.
b is composed of a pin 60e locked and a handle 60f at the other end, and is supported by the rotating shaft 61 on the brackets 55a and 55b. Further, the sub-transmission lever 60 is inserted into the inverted T-shaped guide groove 64a of the lever guide 64 screwed to the machine body frame 62, and the gear shift operation can be performed along the guide groove 64a.

A switch 65 is attached to the lever guide 64,
When the long hole 60c of the sub-transmission lever 60 and the locking rod 16i engage with each other, the lever rod 60d turns on the switch 65, and the buzzer (or warning light) 66 or the like provided at a proper position of the aircraft is energized from the power source 67 to generate an alarm. Is notified, and other workers are warned of forward and backward movements of the aircraft.

On the other hand, the main shift lever 70 that operates the shift operating device 15 including the shift bearing moving plate 16 and the operation arm 39 is the first shift lever.
As shown in the figure, it is erected upright through a guide groove 71 provided in the machine body, is configured to be tiltable in a lateral direction pivotally supported by a shaft 72, and its base portion 70a is pivotally supported by a shaft 73 so as to be vertically oriented. It is tiltably supported. A substantially trapezoidal link arm 74 is pivotally supported on the shaft 73 adjacent to the main shift lever 70, and is biased clockwise in FIG. 1 by a spring 75 wound around the shaft 73. There is. Further, a concave cutout 74a is provided on the upper portion of the link arm 74, and the cutout 7a is formed.
A stopper 77, which is provided on the lever base 70a so as to be adjustable in position by an adjusting bolt 76, is engaged and locked to the 4a. Then, the link arm 74 keeps the main gear lever 70 always in contact with the stopper 77 at one side of the cutout portion 74a by the spring 75.
Since the main transmission lever 70 uses a friction mechanism (not shown), there is no risk of the main transmission lever 70 moving due to the force from the transmission shaft 4.

Further, one end of the rod mechanism 78 is rotatably connected to one end of the link arm 74, and the other end of the rod mechanism 78 is connected to the bracket 39 of the operation arm 39 as shown in FIG.
It is connected to the hole 39i of h with a nut 79.

Since this embodiment has the above-described structure, for example, when the driver tilts the main transmission lever 70 from the neutral position N to the forward F direction in FIG. 1, the link arm 74 rotates via the spring 75. Then, the rod mechanism 78 connected to the link arm 74 is pushed rightward in FIG. With this movement, the operation arm 39 rotates counterclockwise. At this time, if the tip end portion 41a of the knock pin 41 inserted into the pin hole 39b of the operation arm 39 is fitted in the pin hole 38 of the operation arm boss 30, the operation arm 39 and the operation arm boss 30 are integrated. While rotating the variable speed bearing moving plate 16 counterclockwise, the steel ball 19 is disengaged from the notch portion 18a of the notch block 18 against the bias of the spring 23. As a result, the transmission shaft 4 of the hydraulic continuously variable transmission 1 also rotates counterclockwise to change the swash plate of the hydraulic pump 2, and even if the rotational speed of the input shaft 7 to which engine power is input is constant, Hydraulic pump 2
Is increased, the rotational speed of the hydraulic motor 3 is increased, and the forward traveling speed of the airframe is increased. At this time, the auxiliary transmission lever 60 is rotated to the N position of the inverted T-shaped guide groove 64a of the lever guide 64, as shown by the chain line in FIG. The engagement of the speed change bearing moving plate 16 with the locking rod 16i is cut off. On the other hand, when the main transmission lever 70 is tilted in the reverse R direction, the operation arm 39 is rotated clockwise in FIG. 2, and the transmission shaft 4 is also rotated clockwise accordingly and the hydraulic pressure is changed. The oil passage in the type continuously variable transmission 1 is switched, the flow of oil changes, and the hydraulic motor 3 rotates in the opposite direction, so that the machine body moves backward. In addition, the driver
Is set to the neutral position N, the traveling of the airframe is stopped, and the vehicle is alighted. In FIG. 8B, if the auxiliary transmission lever 60 is operated to the right from the neutral position N of the inverted T-shaped guide groove 64a, The long hole 60c of the speed change lever 60 engages with the locking rod 16i of the speed change bearing moving plate 16, and at the same time the wire 48 is pulled, and the arm 44 and the operating arm 45 pivotally supported by the bifurcated fork-shaped bracket 39d of the operation arm 39. Rotates to the left in FIG. 3, and the operating arm 45
Link pin 53 at the other end of knock pin 41 that engages with slot 52 of
Of the operation arm boss 30
The knock pin 41 having the tip end portion 41a fitted thereinto resists the bias of the return spring 50, and the tip end portion 41a comes out of the pin hole 38. Therefore, when the auxiliary shift lever 60 is operated in the F direction of the guide groove 64a, the locking rod 16i of the shift bearing moving plate 16 engaged with the elongated hole 60c of the auxiliary shift lever 60 is rotated to the left, and thus the shift shaft 4 is moved.
Rotates counterclockwise to change the swash plate of the hydraulic pump 2 and even if the rotation speed of the input shaft 7 to which engine power is input is constant, the discharge amount of the hydraulic pump 2 increases and the hydraulic motor 3 The number of rotations increases, which increases the forward traveling speed of the aircraft. When one of the auxiliary transmission levers 60 is operated in the reverse R direction, the transmission shaft 4 is rotated clockwise to change the swash plate of the hydraulic pump 2 and the discharge amount of the hydraulic pump 2 is increased to rotate the hydraulic motor 3. The number will increase and the reverse speed of the aircraft will increase.

In this way, the auxiliary transmission lever 60 provided in the work portion other than the driver's seat is operated to the right from the N position of the guide groove 64a of the lever guide 64, so that the swash plate of the hydraulic continuously variable transmission 1 is operated. It can be linked to the speed change bearing moving plate 16 integrated with the speed change shaft 4 for changing the angle, and further, by the wire 48 locked to the auxiliary speed change lever 60, a knock pin existing in the operation arm 39 fitted to the operation arm boss 30. Since the connection between the speed change shaft 4 and the main speed change lever 70 is released by the release means that operates so that the tip end 41a of the 41 is pulled out from the pin hole 38 of the operation arm boss 30, the operation force is small and the operator It is possible to operate safely and reliably from the outside of the aircraft without boarding the driver's seat. Also, when the auxiliary gear shift lever 60 is released, the auxiliary gear shift lever 60 will move into the guide groove 64a due to the reaction force.
Automatically returns to the N position, and the return spring 50 of the knock pin 41 causes the tip 41a of the knock pin 41 to move to the operation arm boss 3
Since it returns to the 0 pin hole 38, it is safe because the machine will stop even if the operator accidentally releases his / her hand due to a fall or the like.

[Effect of device]

As described above, according to the present invention, the main shift lever that can be fixed to any operation position provided in the driver's seat and the hydraulic continuously variable transmission capable of forward and reverse rotation are interlocked and coupled via the coupling member. In a mobile agricultural machine that performs traveling gear shifting by providing a sub gear shift lever in a working part other than a driver's seat, the sub gear shift lever can be connected to a gear shift shaft for changing the swash plate angle of the continuously variable transmission, and Since the release means for releasing the connection between the shift shaft and the main shift lever is provided and the release means is operated in conjunction with the shift operation of the auxiliary shift lever, the shift operation of the main shift lever at the driver's seat is prevented. In particular, it can be smoothly linked to the speed change shaft without any play. Further, when operating the sub-gear levers provided on other work parts other than the driver's seat, the main gear-shift lever and the gear shift shaft can be disconnected, and a slight operation force of the sub-gear lever can be used to easily perform a gear shift operation from outside the fuselage. be able to.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view of a traveling operating device of a mobile agricultural machine of the present invention, FIG. 2 is a front view of a main portion of the traveling operating device, and FIG. 4A is a front view of the speed change bearing moving plate, FIG. 4B is a side view of the speed change bearing moving plate, and FIG. 5A is a notch block of the speed change bearing moving plate. A plan view, FIG. 5 (b) is a front view of the notch block, FIG. 6 is a sectional view of the operation arm boss, FIG. 7 (a) is a front view of the operation arm, and FIG. 7 (b) is an arm on the operation arm. , Bottom view showing the relationship between the fulcrum shaft, actuating arm, and wire, FIG. 8 (a) is a plan view showing the relationship between the auxiliary shift lever and the locking rod of the shift bearing moving plate, and FIG. 8 (b) is the lever. FIG. 9 is a cross-sectional view in which a hydraulic continuously variable transmission is attached to the transmission, and FIG. 10 (a) is an oil diagram. Front view of formula CVT, 10
Figure (b) is a side view of the hydraulic continuously variable transmission, and Figure 10 (c).
FIG. 3 is a plan view of a hydraulic continuously variable transmission. 1: hydraulic continuously variable transmission, 2: hydraulic pump, 3: hydraulic motor, 4: speed change shaft, 41a: release means (knock pin 41 tip 41)
a), 60: Auxiliary shift lever, 70: Main shift lever,

Claims (1)

(57) [Scope of utility model registration request] 1. A mobile agricultural machine that shifts traveling speeds by linking a main shift lever, which can be fixed at an arbitrary operation position provided in a driver's seat, and a hydraulic continuously variable transmission capable of forward and reverse rotations, through a connecting member. An auxiliary gearshift lever is provided on a work part other than the driver's seat, and the auxiliary gearshift lever is not connectable to a gearshift shaft for changing the swash plate angle of the continuously variable transmission, and further, the gearshift shaft and the main gearshift lever are provided. A disengagement means for disengaging the connection is provided, and the disengagement means is operated in conjunction with a shift operation of the auxiliary speed change lever.