JPH0369747B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a monolever device for a work vehicle such as a combine harvester, and more particularly to an installation structure for a monolever device for switching and operating a side clutch and a handbrake.

(b) Conventional technology In general, work vehicles such as combines use left and right side clutch levers to operate the left and right side clutches and brakes, but recently, instead of the left and right side clutch levers, the left and right side clutches and brakes have been operated at least in the left and right direction. A monolever consisting of a single lever is provided on the operation panel, and when the monolever is tilted to the left or right by a predetermined angle, the side clutch is disengaged via a solenoid valve, and when the monolever is further tilted by a predetermined angle or more, the variable relief valve is activated. A monolever device has been proposed that can be operated to control the left and right brakes.

(c) Problems to be Solved by the Invention However, in the above-mentioned monolever device, a switch for switching between the monolever and the side clutch solenoid valve is installed separately on the operation panel, so it is difficult to install or repair the monolever, etc. In some cases, the monolever and switches must be separately attached to or detached from the operation panel, making the work time-consuming and troublesome. Furthermore, since the operating member for operating the variable relief valve for the handbrake and the monolever are connected via a rod, etc., the monolever cannot be removed unless the rod, etc. is removed, and it is difficult to install the lever. In some cases, the connected rods and the like must be adjusted each time, which makes the work cumbersome and makes maintenance difficult.

(d) Means for solving the problem The present invention aims to solve the above-mentioned problems. For example, as shown in FIGS. 1 and 2, the monolever 22 has a pivot point. A side brake interlocking member 62 is integrally constructed so as to protrude to the opposite side, and the monolever 22 and side clutch switching means 67 are integrally constructed as a subassembly 32. Furthermore, a handbrake actuation means 33 is provided within the operation console 20 separately from the subassembly, and an engaging portion 33a is formed above the handbrake actuation means. Then, the handbrake interlocking member 62 protruding downward from the sub-assy 32 is engaged with the engaging portion 33a of the hand-brake actuating means 33 which is configured separately from the sub-assy 32, and the sub-assy 32 is connected to the operation console. It is characterized by being configured so that it can be attached and removed from above 20.

(E) Effect Based on the above-mentioned configuration, when attaching the subassembly 32 to the operation console 20 during assembly, etc., insert the handbrake interlocking member 62 downward into the operation console 20 from above, and then connect the interlocking member 62 to the operation console 20. It engages with the engaging portion 33a of the actuating means 33. Then, the subassembly 32 is fixed to the operating table 20 in this state.

As a result, when the monolever 22 is tilted in either the left or right direction when steering the work vehicle 1, the side clutch switching means 67 is
is activated and disconnects the side clutch. and,
By further tilting the monolever 22 in the same direction, the handbrake actuating means 33 is actuated by the handbrake interlocking member 62, thereby braking and actuating the handbrake.

Further, when removing the monolever 22 for maintenance or the like, the fixation of the subassembly 32 is released, and the subassembly 32 is further lifted above the operation console 20 to separate the handbrake interlocking member 62 from the handbrake actuating means 33. As a result, the monolever 22 and the side clutch switching means 67 function as a subassembly 32 on the operation console 20.
It is removed in one piece.

(F) Embodiments Hereinafter, embodiments in which the present invention is applied to a combine harvester will be described with reference to the drawings.

As shown in FIG. 13, the combine 1 has a body 3 supported by a crawler 2, and a driver's seat 5, a grain tank 6, and an engine 7 are arranged from the front on one side of the body. An automatic threshing machine 9 is installed on the other side. Further, a preprocessing section 10 is supported at the front of the fuselage 3 so as to be able to rise and fall freely, and the preprocessing section 10 includes a large number of dividers 11,
A plowing device, a cutting blade, a grain culm conveying device, etc. are provided, and a transmission case 12 is mounted inside the machine inside the driver's seat 5. The driver's seat 5 has a driver's seat frame 15 fixed on the aircraft frame 13, and a step surface 16 is fixed to the front part of the frame 15, and a brake pedal that also serves as a parking brake is attached to the front end of the step surface 16. 1
7 is installed, and a seat 19 is installed at the rear of the frame 15 via a seat frame.

On the other hand, an operation console 20 is erected above the front part of the driver's seat frame 15, and the upper surface of the operation console 20 serves as an operation panel 21. Further, the operation panel 21 has a monolever 22 erected on its right side, and is also provided with various operation switches, meters, and display lamps, and manual side clutches are provided on both sides of the operation panel 20. lever 23,
23 are installed so as to be freely rotatable in the longitudinal direction of the fuselage, and normally prevented from rotating by a stopper.

Furthermore, in some cases, as shown in FIG. 9, a convex portion 20 may be provided at the center of the upper portion of the operating console 20 facing the seat 19 so as to project the panel 20a by a predetermined amount.
A speaker 25 for voice monitoring is installed in the convex portion 20b, and a net 26 is placed over the speaker 25. Therefore, the speaker 25 is connected to the seat 19 by the operator.
It is positioned so that it is located between the feet of the operator when sitting in the driver's seat, so that it does not get in the way when operating the pedals, and also so that it does not get in the way when the operator gets in and out of the driver's seat. Furthermore, driver's seat 5
Since the net 26 is placed in the front, the dust generated during the reaping work is removed from the speaker 25.
There is no possibility of intrusion.

In some cases, the manual side clutch lever 23 located behind the monolever 22 may
As shown in FIG. 10a, the curved portion 23b is recessed by a predetermined amount in the upwardly facing central portion of the grip portion 23a.
As shown in FIG. 10b, when the operator operates the monolever 22, the operator places his/her arm on the curved part 23b and moves the monolever in a comfortable position by moving the wrist. 22 may be configured to be operable.

Further, the brake pedal 17 which also serves as a parking brake is attached to a pin 2 on the aircraft body 3, as shown in FIG.
6, and the other end of a wire W connected to the handbrake of the mission case 12 is attached to the rear part of the machine body, and the pedal 17 is connected to the machine body by a spring or the like. 3 Forced backwards. A lock pin 27 is fixed to one side of the pedal 17 facing forward of the machine body 3, and the lock pin 27 engages with a notch 29a formed in a lock plate 29 rotatably installed on the machine body 3. The brake pedal 17 is configured to be fixed at an appropriate depressed position. A manual lever 30 is rotatably installed inside the operation console 20 so as to protrude toward the driver's seat 5. At one end of the lever 30, there is a link mechanism 31 connected at one end to the lock plate 29. The ends are pivoted. Therefore, when the manual lever 30 is rotated upward to rotate the lock plate 29 toward the front of the fuselage via the link mechanism 31, the brake pedal 17 engages the lock pin 27 with the notch portion 29a. As shown in FIG. 12, by rotating the manual lever 30 downward, the lock plate 2
9 to the rear of the machine, when the brake pedal 17 is depressed, the lock pin 27 is engaged at the notch 29a of the lock plate 29, and the brake pedal 17 pulls the wire W. The handbrake is held in a braked and activated state and can be used as a parking brake.

On the other hand, the monolever device M operated by the monolever 22 has a pin, a spring, a rotary switch, etc. integrated with the lever 22 at the rotating base of the monolever 22, as shown in FIGS. 1 and 2. A wire operating member 33 is provided below the sub-assembly 32 and has an engagement notch 33a formed above the sub-assembly 32.
5, the machine body is supported and installed so as to be rotatable in the lateral direction. A rotating plate 36 is installed below the operating member 33 with one end rotatably supported by the operating table 20, and the wire operating member 3
Wires 39a and 39b are stretched from both ends of the pin 37 to the other end of the plate 36 in a V-shape. Furthermore, a wire 39 is attached to the pin 37.
One end of a wire 40 is attached together with a and 39b, and the other end of the wire 40 is connected to one end of a valve operating member 42. The operating member 42 is operated via the wire 40 to press the plunger 41a of the variable relief valve 41 for variable throttle control of the side clutch/brake actuator consisting of a double-acting cylinder. is configured to do so. A pipe 46 is fixed via a fixing member 45 above a support member 43 erected inside the operation console 20, and a shaft 47 fitted into the pipe 46 has one end of the manual side clutch lever 23. It is fixed via a bracket 49. Further, brackets 50 and 51 are fixed to both ends of the pipe 46, and these brackets 50,
A sub-assembly mounting plate 52 is erected and fixed in the vertical direction of the fuselage by means of 51, and a lever bracket 53 constituting the sub-assembly 32 is fixed to the mounting plate 52 with a plurality of bolts 55.

As shown in FIGS. 3a, b, and c, the lever bracket 53 has a pivot pin 56 erected and fixed approximately at its center, and has an oval-shaped fitting at its tip. A joint portion 56a is formed, and a stopper pin 57 is fixedly provided below the pin 56. Further, a bolt hole 56b is formed in the center of the fitting portion 56a, a plurality of bolt holes 53a are bored at the end of the bracket 53, and a cutout is provided below the stopper pin 57. A notch 53b is formed.

Further, as shown in FIGS. 4a and 4b, the monolever 22 has a pivot plate 59 fixed to its lower end, and the pivot plate 59 has a lever boss portion 60 located approximately in the center thereof. is fixed thereto, and a stopper pin 61 is installed in contact with the lower end of the monolever 22. Furthermore, an engagement pin 62 is fixedly provided on the opposite side of the pivot plate 59 from the monolever 22 so as to be in line with the lever 22.

As shown in FIGS. 1 and 2, the subassembly 32 is connected to the lever bracket 53.
A plurality of bolts 55 are attached to the thick mounting plate 52...
... is fixed at the bracket 53.
The lever boss portion 60 of the monolever 22 is fitted into the pivot pin 56 of the monolever 22, and the engagement pin 62 below the lever 22 passes through the cutout portion 53b of the lever bracket 53 and engages the engagement notch of the wire operating member 33. It engages with the notch 33a. In addition, the lever boss portion 60 is provided with a spring 63 (FIGS. 5a and 5b).
) and spring plates 65, 66 are fitted, and furthermore, the plates 65, 66
As shown in the figure, it is made up of two plate members of the same shape, and both ends of the spring 63 are inserted into spring holes 65a and 66a formed at one end of each. The stopper pin 61 of the monolever 22 and the stopper pin 57 of the lever bracket 53 are provided with respective lock portions 65b, 66b, 65c of the spring plates 65, 66, which are biased by the spring 63.
66c is in contact with the monolever 2.
2 is configured to be in a neutral position in a normal state. Further, on the rear surface of the pivot plate 59 of the monolever 22 on the pivot pin 56, a rotary switch 67 (see FIGS. 7a and 7b) is inserted into its insertion hole 67a.
Furthermore, an oval-shaped hole 69a formed in a switch mounting plate 69 (see FIG. 8) is fitted into the fitting portion 56a at the tip of the pivot pin 56, and the pivot pin 56 The mounting plate 69 is fixed to the pivot pin 56 by screwing a bolt 70 into the bolt hole 56b. Further, bolts 71 are inserted and fastened into the long holes 69b drilled in the switch mounting plate 69 and the bolt holes 67b formed in the rotary switch 67.
7 as well as to prevent the monolever 22, spring 63, etc. from slipping out. In this state, the rotary switch 67 has its pin 67c (see FIG. 7) fitted into the pin hole 59a (see FIG. 4a) formed in the pivot plate 59 of the monolever 22. As a result, the rotary switch 67 is operated in a timely manner in response to the tilting operation of the monolever 22.

Since this embodiment has the above configuration,
When the combine harvester 1 is steered to perform reaping work, when the operator tilts the monolever 22 in the right direction, the lever 22 resists the biasing force of the spring 63 received via the spring plate 66. and rotates around the pivot pin 56. Then, the protrusion 67c of the rotary switch 67 is rotated clockwise in FIG. 7 by the monolever 22, thereby energizing the side clutch solenoid valve and disconnecting the right clutch.
Subsequently, when the monolever 22 is further tilted in the same direction, the wire operating member 33 is rotated by the engagement pin 62 to pull the wire 39a. As a result, the rotating plate 36 is rotated upward and pulls the wire 40 to move the valve operating member 42 to the plunger 4.
1a side and presses the plunger 41a to perform variable throttle control of the variable relief valve 41. As a result, the actuator consisting of a double-acting cylinder is further actuated, the right side brake is braked and activated, and the aircraft 3 is turned to the right. Also, when the monolever 22 is tilted to the left, the left side clutch is disengaged and the handbrake is braked and activated in the same way as when the monolever 22 is tilted to the right, causing the aircraft 3 to turn to the left. .

On the other hand, due to maintenance etc., monolever device M
When removing the monolever 22 from the operation table 20, first loosen and remove the bolts 55 that fix the lever bracket 53 to the subassembly mounting plate 52, and then remove the monolever 22.
lift upward. Then, the subassembly 32 released from the operation console 20 is lifted upward together with the lever 22, the engagement pin 62 is separated from the wire operation member 33, and the subassembly 32 is removed from the operation console 20. . In this state, the rotary switch 67, monolever 22
The neutral position, etc. in is adjusted. Further, after the adjustment, the sub-assembly 32 is attached to the operating console 20 again, but at this time, the engaging pin 62 is inserted into the operating console 20 from the operating panel 21 with the engaging pin 62 facing downward. Then, the engagement pin 62 is inserted into the wire operating member 3.
3, and in this state, tighten the lever bracket 5 again with the bolt 55.
3 to the subassembly mounting plate 52. As a result, the monolever device M is restored again, and the side clutch and handbrake can be operated by operating the monolever 22.

(G) Effects of the Invention As explained above, according to the present invention, the monolever 22, which integrally constitutes the handbrake interlocking member 62, and the handbrake switching means 67 are integrally constituted as the subassembly 32, and the assembly The interlocking member 62 protruding downward from the monolever 32 is engaged with the engaging portion 33a of the handbrake actuating means 33, so that the subassembly 32 can be attached and detached from above the operation console 20. The sub-assembly 32 can be easily assembled from above the operating console 20, and during maintenance, the sub-assembly 32 can be easily removed from the operating console 20, and the side clutch switching means 67 and the monolever 22 can be moved to the neutral position. Adjustment and replacement of parts such as the side clutch switching means, which are electrical parts with a relatively short lifespan, can be easily performed, and when adjusting or repairing the side brake actuating means 33, it is possible to adjust and repair the side brake actuating means 33 separately from the subassembly 32 side. This improves work efficiency and maintainability. Furthermore, by integrating the side clutch switching means 67 into the monolever 22, the structure of the monolever device M inside the operating console 20 can be simplified. Space can be saved.

Furthermore, if the subassembly 32 is configured to be fixed and supported on the support member 46 that supports the manual side clutch lever 23 provided on the operation console 20, the existing support member 46 for supporting the manual side clutch lever 23 can be used as is. This allows the sub-assembly 32 to be mounted firmly, thereby making it possible to securely attach the sub-assembly 32, and also to reduce costs since no special mounting structure is required.

[Brief explanation of drawings]

FIG. 1 is a side view showing a monolever device according to the present invention, FIG. 2 is a front view thereof, FIG. 3a is a front view showing a lever bracket, and FIG. 3b is a bottom view thereof.
Fig. 3c is a side sectional view thereof, Fig. 4a is a front view showing the monolever in detail, Fig. 4b is a side view thereof, and Fig. 5
Figure a is a front view showing the spring, Figure 5 b is a side view thereof, Figure 6 is a front view showing the spring plate, Figure 7 a is a front view showing the rotary switch in detail, and Figure 7 b is its plane. Figure 8 is a front view showing the switch mounting plate, Figure 9 is a perspective view showing the driver's seat in detail, Figure 10a is a front view showing the grip of the manual side clutch lever, and Figure 10b is its front view. Side view,
FIG. 11 is a side view showing a manual lever for operating a brake pedal that also serves as a parking brake, and FIG. 12 is a side view showing its operating state. FIG. 13 is an overall side view showing a combine harvester to which the present invention is applied. DESCRIPTION OF SYMBOLS 1... Work vehicle (combine harvester), 20... Operation console, 22... Monolever, 32... Subassy, 33... Handbrake operating means (wire operating member), 33a... Engaging (notch) portion, 62 …
...Handbrake interlocking member (engaging pin), 67...
...Side clutch switching means (rotary switch), M...Monorever device.

Claims (1)

[Scope of Claims] 1. A side clutch and a side brake are provided, and the side clutch switching means is operated by tilting operation of one monolever installed on an operation console to switch the side clutch, and further tilting of the lever is possible. In the work vehicle configured to brake and operate the handbrake by operating the handbrake actuating means, the monolever is integrally formed with a handbrake interlocking member protruding from the opposite side of the pivot portion thereof, and The monolever and the side clutch switching means are integrally constructed as a sub-assembly, and the hand brake operating means is constructed and arranged separately from the sub-assembly within the operation console, and the hand brake operating means is configured separately from the sub-assembly. An engaging portion is formed in an upper portion, and the hand brake interlocking member protruding below the sub-assembly is engaged with an engaging portion of the hand brake actuating means configured separately from the sub-assembly. A monolever device for a work vehicle, in which a subassembly can be attached and removed from above the operation platform. 2. A monolever device for a work vehicle, wherein the subassy is fixed to and supported by a support portion that supports a manual side clutch lever provided on the operation console.