JP2592750Y2 - Traveling device for mobile agricultural machine - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is intended for special work such as combine threshing such as a combine harvester and a harvester, as well as work speed on a road, for example, manual threshing of a combine when cutting a headland. The present invention relates to a traveling operation device of a hydraulic continuously variable transmission in a mobile agricultural machine that requires intermittent very low speed such as threshing work with a harvester after harvesting with a binder, specifically, a main shift lever during normal work, and a special shift work during special work. The present invention relates to a traveling operation device for a mobile agricultural machine that shifts the body forward or backward by operating a sub-shift lever forward or backward, respectively.

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

As disclosed in JP-A-61-143223 and JP-A-58-119426, a driver's seat is used during harvesting in a combine, so-called manual threshing with a so-called headland-cut culm. It is already known that the position of the machine body is changed by slightly moving the machine body by an auxiliary speed change lever provided in an external working unit (for example, a threshing unit).

However, the former has the disadvantage that when the main shift lever is shifted, the auxiliary shift lever operates unexpectedly and the operation load of the main shift lever is heavy. Also,
In the latter, the engagement piece of the sub-transmission lever is disengaged from the main transmission lever in the driver's seat, and if the sub-transmission lever is operated without locking the engagement piece, the aircraft does not advance. The driver must get into the driver's seat again to lock the engagement pieces, which is troublesome.

[Means for solving the problem]

The present invention has been made to solve the above-described problems, and its technical means is to provide a main transmission lever that can be fixed to an arbitrary operation position provided in a driver's seat and a hydraulic continuously variable transmission that can rotate normally and reversely. In a mobile agricultural machine that performs a running shift by interlocking a gear with a device via a connecting member, a sub-shift lever is provided in a work unit outside a driver's seat, and the sub-shift lever is used to change a swash plate angle of the continuously variable transmission. The link can be connected to the shaft via a disconnecting means, and in conjunction with the shift operation of the sub-shift lever, the disconnecting means is switched from a disconnected state to a connected state to perform a traveling shift,
When the hand is released from the auxiliary transmission lever, the automatic transmission returns to the neutral position.

[Action of the invention]

According to the present invention, the swash plate angle can be changed independently by tilting the main shift lever provided in the driver's seat of the mobile agricultural machine from the neutral position in the forward direction or the reverse direction during normal harvesting and threshing work and traveling on the road. By rotating the transmission shaft, the discharge amount of the hydraulic pump is changed to obtain the degree of increase or decrease of the forward or reverse traveling speed. In addition, during special work, if the sub-shift lever provided in the work section outside the driver's seat is operated, the sub-shift lever is connected to the shift shaft for changing the swash plate angle to perform forward or reverse traveling shift. In addition, when the operator releases his / her hand from the auxiliary transmission lever, it automatically returns to the neutral position.

〔Example〕

One embodiment of the present invention will be described with reference to the drawings. The hydraulic continuously variable transmission 1 includes a hydraulic pump 2, a hydraulic motor 3, and a transmission shaft 4 for changing a swash plate angle, as shown in FIGS. 10 (a), (b) and (c). And the hydraulic pump 2 has an input shaft 2a
The hydraulic motor 3 has a storage box shaft 3a, and the input / output shafts 2a, 3a are provided so as to project vertically. The transmission shaft 4 is projected in a direction different from the input / output shafts 2a and 3a by 90 degrees. By rotating the transmission shaft 4 right and left, the angle of the swash plate of the hydraulic pump 2 is changed. The amount of oil supplied to the hydraulic motor 3 changes, and the number of revolutions of the hydraulic motor 3 can be changed to an unlimited level.

As shown in FIG. 9, the hydraulic continuously variable transmission 1 is connected to and coupled to a combine transmission 6, and the input shaft 2a of the hydraulic continuously variable transmission 1 is connected to the input shaft 7 of the transmission 6. And the output shaft 3a is 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. Have been.

A gear 11 is fitted on 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 crawler 14. Also,
A pulley 13 with a built-in one-way clutch is attached to a portion of the drive shaft 9 protruding outside the transmission case of the transmission 6, and power is transmitted from the pulley 13 to a pre-processing unit of the combine.

The traveling operation device that rotates the transmission shaft 4 of the hydraulic continuously variable transmission 1 to the left and right to rotate forward and reverse to continuously change the rotation speed of the hydraulic motor 3 as shown in FIG. The transmission comprises a transmission operating device 15, a main transmission lever 70 for operating the transmission operation device 15, an auxiliary transmission lever 60, and the like. The transmission operation device 15 is mounted outside the hydraulic continuously variable transmission 1.

That is, as shown in FIG. 3, the transmission shaft 4 having a rectangular cross section projecting from the hydraulic stepless transmission 1 is provided with a transmission bearing moving plate 16.
Is installed. As shown in FIGS. 4 (a) and 4 (b), the speed-change bearing moving plate 16 is provided with a stepped notch 16a over a substantially radial portion of the outer periphery thereof, and a screw is provided at both ends of the notch 16a. A stop 16c having a hole 16b is provided. Then, at a position facing the outer peripheral portion, a groove 16d is cut from one end to a position beyond the central portion so as to reach the back side of the speed-change bearing moving plate 16, and further has a groove formed therein. A rectangular hole 16e is formed in the center. Also, a screw hole 16f for a tightening bolt is drilled so as to be orthogonal to the groove 16d, and a screw hole 16g and a through hole 16h for screwing an operation arm boss 30 described later are provided at two places. .

Further, a locking rod 16i for engaging with a sub-transmission lever 60 described later is provided outside the transmission bearing moving plate 16. As shown in FIG. 2, the speed-change bearing moving plate 16 has a rectangular hole 16e fitted to the speed-change shaft 4, and a fastening bolt 17 is screwed and fastened to a fastening bolt screw hole 16f to be fixed. Have been. And a notch in a substantially semicircular portion of the outer peripheral portion of the speed-change bearing dynamic plate 16.
A substantially crescent-shaped notch block 18 in plan view for regulating the neutral position of the transmission shaft 4 is fitted to 16a, and a steel ball 19 is engaged with a notch portion 18a of the notch block 18. The steel ball 19 is urged by a spring 23 in a sleeve 22 fixed to the upper part of the transmission shaft 4 of the hydraulic type continuously variable transmission 1 and fixed by a lock nut 21, and the spring 23 is fixed by a stop bolt 24. The escape is prevented. At both ends of the notch block 18, receiving members 25 as shown in FIG. 5 are provided so as to face the stoppers 16c of the speed-change bearing moving plate 16, and screw holes of the stoppers 16c of the speed-change bearing moving plate 16 are provided. The notch block 18 is slightly rotated in the left or right direction by the push bolt 26 screwed to 16b. Thereby, the related parts of the transmission shaft 4 (the transmission bearing moving plate 16, the notch block 18,
In addition to adjusting the variation due to the processing accuracy of the operation arm boss 30 and the like, the positions of the notch block 18 and the speed-change bearing moving plate 16 are precisely adjusted, and the neutral position of the speed-change shaft 4 is regulated. The position where the oil does not flow to the position 3 is adjusted. After the adjustment, the position is fixed with the lock nut 26a.

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 an eave-shaped portion 28 fitted with the speed-change bearing motion plate 16. Have. The operation arm boss 30 has a substantially hollow cylindrical shape, and the transmission shaft 4 is provided at the end portion of the transmission shaft 4 of the transmission bearing moving plate 16.
And the operating axis boss 30
Two through holes 31 on the upper side and through holes 16h of the speed change bearing dynamic plate 16
After the neutral position of the transmission shaft 4 is regulated, the bolt 32 is screwed into the screw hole 27 of the notch block 18, and the bolt 32 inserted into the lower two through holes 31 of the operation arm boss 30 is inserted. The speed-change bearing moving plate 16 is screwed into the screw hole 16g to be integrally formed.

A bearing insertion portion 33 of the operation arm boss 30 on the opposite side of the transmission shaft 4
A bearing 34 is fitted into the groove, and is stopped by a retaining ring 35 locked in a retaining ring groove 36. 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 around the outer periphery of the operation arm boss 30, and the operation arm 39 is prevented from coming off by the flange portion 37 of the operation arm boss 30. The operation arm 39 has a substantially magnifying glass frame-shaped main body 39a as shown in FIG. 7 (a). A pin hole 39 is provided in the handle portion of the main body 39a so that the knock pin 41 is contained therein.
b is drilled, a screw hole 39c for screwing with the fixing nut 42 is provided at the end, and a forked fork-shaped bracket 39d is fixed and protruded on the right side in front view, and a hole 39e is drilled at the end. ing.

Further, an L-shaped bracket 39f is fixedly provided on the left side as viewed from the front, and a wire stopper 39g is fixedly provided at one end thereof. In addition, a bracket 39h having a hole 39i directed downward and to the left in front view is fixedly provided at the loop portion of the main body 39a. Further, a grease groove 39j for filling grease is provided inside the loop portion of the main body 39a to reduce a turning resistance when the operation arm boss 30 turns. A viewpoint shaft 43 to which an arm 44 is fixed is inserted into a hole 39e of the forked fork-shaped bracket 39d, and an operation arm 45 is fixed to a second end of the fulcrum shaft 43 with a nut 46. A pin 47 is fixed to the other end of the arm 44. An end 49a of a wire 48 fixed to a wire stopper 39g is inserted into the pin 47, and the pin 47 is prevented from falling off by a split pin 51. Operating arm 45
The other end of the long hole 52 is inserted into a pin hole 39b formed in the handle portion of the main body 39a, and is urged by a return spring 50, which is prevented from protruding by a fixing nut 42, and is urged by a pin hole of the operation arm boss 30. The other end of the knock pin 41 to which the distal end portion 41a is fitted is engaged with the link pin 53 at 38. The bearing 34 fitted in the bearing fitting portion 33 of the operation arm boss 30 has a fulcrum bracket body.
A cylindrical shaft 56 fixed to one end of 55 is inserted and locked by a retaining ring 57. The other end of the fulcrum bracket body 55 is provided with a rotating shaft
Brackets 55a and 55b having holes 55c and 55d through which the wire 48 is inserted are fixed, and a wire stopper 55e for screwing the wire 48 in a strip shape is fixed to the upper bracket 55a.

The rotation boss 60a is fixed to one end of the auxiliary transmission lever 60,
Lever plate 60b having a long hole 60c engaged with locking rod 16i of transmission bearing moving plate 16, lever rod 60d, end 49 of the other end of wire 48
b is composed of a locked pin 60e and a grip 60f at the other end, and is supported on the brackets 55a and 55b by a rotating shaft 61. The sub-transmission lever 60 is inserted into a reverse-shaped guide groove 64a of a lever guide 64 screwed to the body frame 62, so that a shift operation can be performed along the guide groove 64a. A switch 65 is attached to the lever guide 64, and the switch 65 is turned on by a lever rod 60d in which the long hole 60c of the auxiliary transmission lever 60 and the locking rod 16i are engaged, and a buzzer ( Or, a warning light) 66 or the like is energized from the power supply 67 to notify an alarm, and the forward / reverse of the machine is warned to other workers.

On the other hand, the main shift lever 70 for operating the shift operation device 15 including the shift bearing moving plate 16 and the operation arm 39 is provided with a first shift lever.
As shown in the figure, it stands upright through a guide groove 71 provided in the fuselage, is pivotally supported by a shaft 72 and is configured to be able to tilt in the horizontal direction, and its base 70a is pivotally supported by a shaft 73 and It is tiltably supported. A substantially trapezoidal link arm 74 is pivotally supported on the shaft 73 adjacent to the main transmission lever 70, and is biased clockwise in FIG. 1 by a spring 75 wound around the shaft 73. I have. Further, a concave notch 74a is provided at the upper part of the link arm 74, and the notch 7
A stopper 77 provided on the lever base 70a so as to be adjustable in position with an adjustment bolt 76 is engaged with and locked to 4a. Then, the link arm 74 is always moved by the spring 75 so that the stopper 77 thereof abuts against one side of the notch 74a.
The main transmission lever 70 uses a friction mechanism (not shown), and there is no possibility that the main transmission lever 70 will be moved by the force from the transmission shaft 4.

Further, one end of a 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.
The nut 39 is connected to the hole 39i of h.

Since the present embodiment has the above-described configuration, the driver tilts the main shift lever 70 from the neutral position N in the forward F direction in FIG. And the link arm 74 rotates via a spring 75, and 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,
When the distal end 41a of the knock pin 41 inserted into the pin hole 39b of the operation arm 39 is fitted into the pin hole 38 of the operation arm boss 30, the operation arm 39 and the operation arm boss 30 are integrally moved to change the speed of the transmission bearing. Rotate the plate 16 counterclockwise and make a steel ball 19
Notch Blotsk 18 against the bias of spring 23
Is disengaged from the notch 18a. by this,
The transmission shaft 4 of the hydraulic continuously variable transmission 1 is also rotated counterclockwise to change the swash plate of the hydraulic pump 2 so that the hydraulic pump 2 can rotate even if the rotation speed of the input shaft 7 to which engine power is input is constant. , The rotation speed of the hydraulic motor 3 increases, and the forward traveling speed of the body increases. At this time, the sub-shift lever 60
Is a lever guide 64 as shown by a chain line in FIG. 8 (a).
Is rotated to the N position of the inverted T-shaped guide groove 64a, and the engagement between the long hole 60c and the locking rod 16i of the speed-change bearing moving plate 16 is disconnected. On the other hand, when the main transmission lever 70 is tilted in the reverse R direction, the operation arm 39 rotates clockwise in FIG. 2, and accordingly the transmission shaft 4 also rotates clockwise, thereby The oil passage in the continuously variable transmission 1 is switched, the flow of oil changes, and the hydraulic motor 3 rotates in the opposite direction, so that the aircraft moves backward. In addition, when a special operation, for example, a manual threshing operation of a grain stalk that has been cut by a headland, the driver sets the main shift lever 70 to the neutral position N, stops traveling of the aircraft, and gets off the vehicle, and FIG. ), When the sub-transmission lever 60 is operated rightward from the neutral position N of the inverted C-shaped guide groove 64a, the long hole 60c of the sub-transmission lever 60 engages with the locking rod 16i of the transmission bearing moving plate 16. At the same time, the wire 44 is pulled, and the arm 44 pivotally supported by the forked bracket 39d of the operating arm 39.
3, the operating arm 45 pivots to the left in FIG. 3, and pushes down the link pin 53 at the other end of the knock pin 41 which engages with the long hole 52 of the operating arm 45. The knock pin 41 fitted with the distal end portion 41a comes off the distal end portion 41a from the pin hole 38 against the bias of the return spring 50. Accordingly, the sub-shift lever 60 is moved to the F position of the guide groove 64a.
By operating in the direction, the locking rod 16i of the speed-change bearing moving plate 16 engaged with the elongated hole 60c of the auxiliary speed-change lever 60 turns left. Even when the swash plate is changed and 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, the rotation speed of the hydraulic motor 3 increases, and the forward running speed of the aircraft increases. Let it. On the other hand, when the sub-transmission lever 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 increases, and the rotation of the hydraulic motor 3 is increased. Increases the number and increases the reverse running speed of the aircraft.

As described above, the sub-transmission lever 60 provided in the other working section other than the driver's seat is operated by the cutting means, that is, the elongated hole of the sub-transmission lever 60 by operating the guide groove 64a of the lever guide 64 rightward from the N position. The transmission shaft 4 for changing the swash plate angle of the hydraulic stepless transmission 1 is engaged by the engagement of the locking rod 16i of the transmission bearing moving plate 16 with the transmission bearing 60c.
At the same time as connecting the speed change bearing dynamic plate 16 and the
Since the tip 41a of the knock pin 41 inside the operation arm 39 is operated so as to be pulled out from the pin hole 38 of the operation arm boss 30, the connection between the transmission shaft 4 and the main transmission lever 70 is released,
By operating the sub-transmission lever 60 in the F direction or the R direction of the guide groove 64a, the engagement between the steel ball 19 and the notch portion 18a is released, that is, the neutral position of the transmission shaft 4 is released, and the Since the shaft 4 is rotated to change the discharge amount of the hydraulic pump 2 and the machine body can be moved forward or backward, the gear can be connected to or disconnected from the transmission shaft 4 outside the machine body. Can be. Also, when the hand is released from the auxiliary transmission lever 60, the auxiliary transmission lever 60 automatically returns to the N position of the guide groove 64a due to the traveling reaction force, and further, the distal end portion 41a of the knock pin 41 is operated by the return spring 50 of the knock pin 41. Since the arm returns to the pin hole 38 of the arm boss 30, even if the operator accidentally releases the hand such as falling down, the machine body stops and is safe.

[Effect of the invention]

As described above, according to the present invention, the main transmission lever 70 that can be fixed to an arbitrary operation position provided in the driver's seat and the hydraulic continuously variable transmission 1 that can be rotated forward and reverse are interlocked via the connection member. A sub-shift lever 60 is provided in a work section outside the driver's seat in a mobile agricultural machine that performs a running shift, and the sub-shift lever 60 is connected to and disengaged from the dislocation shaft 4 for changing the swash plate angle of the continuously variable transmission 1. In response to the shifting operation of the sub-shift lever 60, the connecting / disconnecting means is switched from the disconnected state to the connected state, and the traveling speed is changed, and the hand is released from the auxiliary speed lever 60. And the automatic return to the neutral position, only the operation of the main transmission lever 70 is performed during normal work, and at this time, the connection between the auxiliary transmission lever 60 and the transmission shaft 4 is disconnected. 70 can be operated lightly without having to operate at the same time as the auxiliary transmission lever 60 . In addition, when performing a special operation, the connection of the sub-transmission lever 60 to the transmission shaft 4 can be performed in conjunction with the operation of the sub-transmission lever 60.
This eliminates the hassle of engaging and disengaging an engagement piece provided in a driver's seat different from that of the driver's seat, allows the operator to easily perform a traveling speed change operation in a work section outside the driver's seat, and furthermore, allows the When you release your hand from the camera, it automatically returns to the neutral position.

[Brief description of the drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a perspective view of a traveling operation device of the mobile agricultural machine of the present invention, FIG. 2 is a front view of a main part of the traveling operation device, and FIG. FIG. 4 (a) is a front view of a speed-change bearing moving plate, FIG. 4 (b) is a side view of the speed-change bearing moving plate, and FIG. 5 (a) is a view of a notch block. 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. FIG. 8 (a) is a plan view showing the relationship between the auxiliary transmission lever and the locking rod of the transmission bearing moving plate, and FIG. 8 (b) is the lever. FIG. 9 is a cross-sectional view showing a hydraulic and continuously variable transmission attached to a transmission, and FIG. Front view of formula CVT, 10
Figure (b) is a side view of the hydraulic continuously variable transmission, and Figure 10 (c).
FIG. 2 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, 16i: disconnection means, 60: auxiliary speed change lever, 70: main speed change lever

Claims (1)

(57) [Scope of request for utility model registration] 1. A main transmission lever 70 which can be fixed to an arbitrary operation position provided in a driver's seat and a hydraulic continuously variable transmission 1 which can be rotated forward and reverse.
And an auxiliary transmission lever 60 is provided at a working portion outside the driver's seat, and the auxiliary transmission lever 60 is used to change the swash plate angle of the continuously variable transmission 1. The transmission shaft 4 can be connected to the transmission shaft 4 via a connection / disconnection means, and in conjunction with the shift operation of the auxiliary transmission lever 60, the connection / disconnection means is switched from a disconnected state to a connected state to perform a traveling speed change. A travel operating device for a mobile agricultural machine, which is configured to automatically return to a neutral position when the hand is released from the shift lever 60.