JPH0613654Y2 - Lever device for work vehicles - Google Patents

Description

[Detailed Description of the Invention] (b) Industrial field of application The present invention relates to a lever device in a working vehicle such as a combine, and more specifically, to the operating console, the operating lever is oscillated in the left-right direction of the traveling machine body and the front-rear direction of the traveling machine body. The present invention relates to a lever device that is movably installed.

(B) Conventional technology Generally, a working vehicle such as a combine is operated by tilting the left and right side clutch levers provided on the operation console.
The side clutch / brake device is appropriately operated to steer the traveling vehicle.

However, in the combine harvester described above, the hydraulic lever has to be operated separately from the side clutch lever when the pretreatment unit is moved up and down, and therefore the combine harvester is circulated by reaching the end of the field during mowing work. In this case, operate the hydraulic lever to raise the pretreatment section, and operate either the left or right side clutch lever to operate the side clutch / brake device to rotate the traveling machine body, and further end the circulation. After that, the operator had to perform the complicated work of operating the hydraulic lever again to descend to the vicinity of the field of the pretreatment section, and the operator's burden was increased.

Therefore, conventionally, as disclosed in Japanese Patent Publication No. 59-46008, the left and right side clutch levers for operating the side clutch / brake device and the hydraulic lever for raising and lowering the pretreatment unit are integrally formed into one monolever. By tilting the monolever in the left-right direction of the traveling machine body, the side clutch / brake device is operated, and by tilting in the front-rear direction of the traveling machine body, the up-and-down switching valve is operated to vertically move the pretreatment section. A control device configured as described above has been devised.

The steering operation device is provided with a box body at the upper end of a base side operation lever that can rotate in the longitudinal direction of the traveling machine body, and the tip operation lever can be freely swung in the lateral direction of the traveling machine body in the box body. A switch is installed inside the box so as to be turned on / off by the tilting operation of the tip end operation lever, and the base side operation lever is moved by tilting the monolever in the longitudinal direction of the traveling machine body. By tilting together with the tip operation lever, the up / down switching valve is switched by this to raise / lower the pretreatment section, and by tilting the monolever in the lateral direction of the traveling machine body, only the tip operation lever is tilted to move the inside of the box body. Turn the switch on and off,
Thus, the side clutch / brake device is operated to appropriately steer the traveling machine body.

(C) Problems to be solved by the invention However, in the above-described conventional operation control device, the switch installed inside the box has the tip operation lever and the base operation lever together with the operation lever for raising and lowering the pretreatment unit. Since it moves, the wiring to the switch is moved each time, which may cause a disconnection between the switch and the soldered portion of the wiring, or damage to the coating of the wiring to cause an electrical trouble. There is

(D) Means for Solving the Problem The present invention is intended to solve the above-mentioned problems, and as shown in FIG. 1, for example, as shown in FIG.
(See the drawing), in a work vehicle in which the operating lever 3 is installed so as to be swingable in the lateral direction of the traveling machine body and in the longitudinal direction of the traveling machine body, lever detecting means 16 for detecting the swinging operation of the operating lever 3 is provided. A swing member 40, which is installed on a fixed member 15 that is not moved by swinging of the operation lever 3, and is connected to the lever detecting means 16 and swingably supported by the fixed member 15, The moving member 40 is in contact with a contact member 45 that swings integrally with the operation lever 3, and is biased 41 so as to swing in response to a swing operation of the operation lever. It is a thing.

(E) Action Based on the above configuration, during work such as mowing by the work vehicle,
When the operating lever 3 is tilted in the front-rear direction (or the left-right direction) of the traveling machine body to perform the raising / lowering operation of the preprocessing unit or the steering operation of the traveling machine body, the swinging member 40 is swung in conjunction with the tilting operation. Thus, the lever detection means 16 is turned on.
At this time, since the lever detecting means 16 is fixed to the fixing member 15 and is not moved by the operation of the operation lever 40, its wiring is not bent or moved. Further, the swinging member 40 always contacts the contacting member 45 and moves following the swinging operation of the operation lever 3.

(F) Embodiment An embodiment according to the present invention will be described below with reference to the drawings.

The operation console 1 erected in front of the driver's seat in the combine
As shown in FIGS. 2 and 3, the operation panel 2 has an upper surface, and the operation panel 2 has a monolever 3
Is erected, and various operation switches, meters and display lamps are provided. Further, manual side clutch levers 5 and 5 are installed on both sides of the operation console 1 so as to be rotatable in the front-rear direction of the traveling machine body, and normally the rotation is blocked by stoppers. The operation console 1
A shaft 6 is fixedly provided inwardly of the shaft 6, and the pipe 7 fitted to the shaft 6 is provided with the manual side clutch lever 5
One end of is fixed. Further, a mounting plate 10 is erected and fixed to the shaft 6 in the vertical direction of the machine body, and a lever bracket 11 is fixed to the mounting plate 10.
In the figure, 8 is a rubber boot.

As shown in FIG. 1, the lever bracket 11 is formed in an L-shape, has a fitting hole 11a and a number of bolt holes 11b, and has a stopper pin 12 at one end thereof. It is fixed so as to project laterally. Further, a bent portion 11c is formed at the other end of the lever bracket 11, a boss portion 13 is provided on the bent portion 11c, and an L-shaped fixing plate 15 is attached to the back surface thereof. Has been. Further, the shaft 14 of the rotary switch 16 is inserted into the boss portion 13 so as to penetrate the fixing plate 15, and the flange portion 16a of the rotary switch 16 is bolted to the fixing plate 15. On the other hand, the monolever 3 is composed of a lever member 17 and a turning base member 19, and the turning base member 19 has a boss portion 20 so as to project to one side at the substantially central portion thereof. ,
A bar member 21 is hung and fixed at one end facing downward, and an operation pin 22 is fixed to the bar member 21 so as to project in the same direction as the boss portion 20. A fixing member 23 and a U-shaped fixing member 25 are fixed to the other end of the rotating base member 19 so as to face each other, and prismatic supporting members 26, 26 are provided below the fixing member 25. The support members 26, 26 are fixedly installed facing each other with a space therebetween.
Cylindrical holes 26a, 26a are formed in each. Further, a prismatic base portion 17a is formed at the lower end portion of the lever member 17, and an oval hole 17b is formed through the base portion 17a in the lateral direction.
The chamfered portions 29a, 29a on both sides of the distal end of the link member 27 with the base portion 17a fitted between the support members 26, 26.
The shaft 29, which is formed with 29a, is penetrated, whereby the lever member 17 and the rotation base member 19 are connected. Furthermore,
Leaf springs 30 and 30 are bolted to the fixing members 23 and 25, respectively, to urge and support the lever member 17 from the front-rear direction of the traveling machine body, whereby the lever member 17 is swung in the directions A and B. When it is released, it is configured such that it can always return to the central neutral position when released by releasing the hand. Then, the rotation base member 19 is the lever member 17
And the two rotating plates 32, 32 and the return spring 33 are fitted and inserted into the boss portion 20, the boss portion 20 is erected in the fitting hole 11a of the lever bracket 11 with a pin 31 ( It is rotatably fitted in (see FIG. 3). At this time, the stopper pin 12 is provided in the gap 35 formed at one end of each of the two rotating plates 32, 32.
And the operation pin 22 is inserted into a gap 36 (see FIG. 2) formed at the other ends of the rotary plates 32, 32. Further, on the rear surface of the rotary base member 19, a rotary switch 3 for operating a valve for switching between the left and right side clutch / brake devices when it is turned on.
7 is fixed via the plate 39. Further, the shaft portion 40a of the link member 40 is rotatably fitted to the boss portion 13 of the lever bracket 11 with the return spring 41 interposed therebetween, and the shaft portion 40a is attached to the rotary switch 16 from below. The shaft 14 is fitted. Further, a pin 45 provided on the shaft 29 is abutted on the bar member 42 installed across both ends of the link member 40 so as to be orthogonal to each other via the plate 43. Therefore, when the monolever 3 is tilted in the direction of arrow A in FIG.
The swinging motion of 7 is transmitted to the link member 27 as a rotary motion in the direction of arrow C, and the pin 45 further presses the bar member 42 to rotate the link member 40, thereby turning on the rotary switch 16 and turning it forward. When the processing section is lowered and the monolever 3 is tilted in the direction of arrow B, the link member 27 moves in the direction of arrow D.
The link member 40 is released by rotating the shaft 14 in the opposite direction from the previous direction by the urging force of the return spring 41 to turn on the rotary switch 16 and raise the pretreatment section.

On the other hand, as shown in FIG. 2, a valve operating member 46 is installed below the rotating base member 19 so that the central portion thereof is rotatably supported by a pin 47, and at the upper end of the valve operating member 46. Has an engaging portion 50 formed by installing two pins 49, 49 at a predetermined interval, and a bar member 21 fixed to the rotating base member 19 is inserted into the engaging portion 50. Has been done. Therefore, when the monolever 3 is tilted in the lateral direction of the traveling machine body, the rotary switch 37 is turned on in the initial tilting state to operate the changeover valves for the left and right side clutch / brake devices, and the hydraulic cylinder device is extended to either the left or right. Disconnect the side clutch. Then, by further tilting the monolever 3 in the same direction, the bar member 21 is brought into contact with and pressed against the pin 49 to rotate the valve operating member 46, whereby one relief is provided via a continuous drawing means such as a wire. The valve is throttled to increase the hydraulic pressure to further extend the cylinder device to brake and operate the side brake. In the figure, 50 is a lead wire.

Since the present embodiment is configured as described above, when the traveling machine body travels when reaching the end of the field, for example, during mowing work with a combine, first the monolever 3 is in front, that is, in the direction of arrow B in FIG. Tilt. Then, the lever member 17 rotates together with the shaft 29 of the link member 27, whereby the pin 45 rotates in the direction of arrow D in FIG. 1 to release the bar member 42 of the link member 40. Therefore, the link member 40 is rotated by the urging force of the return spring 41 while contacting the pin 45 in the moving direction of the pin 45, whereby the shaft 14 of the rotary switch 16 is rotated in the same direction and turned on. It Based on this, the hydraulic cylinder device for raising and lowering the pretreatment section is extended to raise the pretreatment section. And
When the monolever 3 is tilted to the left or right, the initial tilting causes the rotary switch 37 to rotate.
Turns on and activates the switching valve for the side clutch / brake device, and first disconnects either the left or right side clutch. Then, when the monolever 3 is further tilted in the same direction, the rotation base member 19 rotates together with the lever member 17 and the bar member 21 abuts or rotates one of the pins 49. As a result, the valve operating member 46 is moved to the pin 4
Rotate around 7 and throttle one relief valve via wire etc. to increase the oil pressure, so that the hydraulic cylinder device is further extended to brake / operate the side brake, and thus the combine is rotated. . Then, when the monolever 3 is returned to the center position, the hydraulic cylinder device for the side clutch / brake device is contracted to release the side brake, and subsequently the side clutch is connected. When the monolever 3 is tilted in the direction of arrow A in FIG.
At the same time, the link member 27 rotates and the pin 45 rotates in the direction of arrow C, pressing the bar member 42 and rotating the link member 40. As a result, the shaft 14 rotates in the opposite direction to the previous one and the rotary switch 16 is turned on, so that the hydraulic cylinder device for the pretreatment section is contracted to lower the pretreatment section to an appropriate position. In the state, the mowing work is performed again.

When the monolever 3 is tilted, the rotary switch 16
The link member 2 while being fixed to the fixing plate 15.
It is turned on and off via 7 and 40, so that the lead wire 50 may be twisted to damage its coating, or the switch 16
It is possible to prevent problems such as disconnection of the connection part with the terminal of. Further, since the link member 40 is constantly urged toward the pin 45 side of the link member 27 by the return spring 41, it is possible to follow the operation of the pin 45. Therefore, the tilting of the monolever 3 causes the lever member 17 to move in any direction. Even if the pin 45 is tilted, the rattling between the pin 45 and the bar member 42 does not occur.

(G) Effect of the Invention As described above, according to the present invention, the lever detecting means 16 is installed on the fixed member 15 which is not moved by the swing of the operation lever 3, and the lever detecting means 16 is provided.
Further, a swing member 4 capable of swinging in conjunction with the operation lever 3
Since 0 is connected, the lever detecting means 16 does not move together with the operating lever 3 when the operating lever 3 is operated, so that the lead wire 50 of the lever detecting means 16 is kinked. As a result, it is possible to reliably prevent problems such as damage to the coating and disconnection of the connection between the lever detection means 16 and the lead wire 50.

Further, the swinging member 40 connected to the lever detecting means 6 is
Since it is urged to come into contact with the contact member 45 that swings integrally with the operating lever 3 and always moves in accordance with the swinging operation of the operating lever 3, it is easy to cause rattling when switching the operating direction of the operating lever. It is possible to perform the detection by the proper lever detection means without causing an erroneous operation.

[Brief description of drawings]

1 is an assembly view of a lever device according to the present invention, FIG. 2 is a front view of the lever device, and FIG. 3 is a side view thereof. DESCRIPTION OF SYMBOLS 1 ... Operation platform, 3 ... Operation lever (mono lever), 17 ... Lever member, 16 ... Lever detection means (rotary switch), 19 ... Rotation base member, 40 ... Oscillation member (link member), 45 ... Contact member (pin).

Claims (1)

[Scope of utility model registration request] 1. A lever device for a working vehicle, wherein an operating lever is installed on a control console so as to be swingable in a lateral direction of a traveling machine body and a longitudinal direction of the traveling machine body, and a lever detection for detecting a swinging motion of the operating lever. Means is installed on a fixed member that is not moved by the swing of the operation lever, and the lever detection means is connected to a swing member that is swingably supported on the fixed member. The member is in contact with a contact member that swings integrally with the operation lever, and is biased so as to swing in accordance with a swing operation of the operation lever. .