JPH0613655Y2 - Lever device for work vehicles - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial field of application The present invention relates to a lever device in a working vehicle such as a combine, and more specifically, tilts the operation lever on the operation console in the lateral direction of the traveling machine body and the longitudinal direction of the traveling machine body. A lever device installed freely.

(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, the above-mentioned combine has to operate the hydraulic lever separately from the side clutch lever when the pretreatment section is moved up and down, so that the combine is rotated when the field end is reached during mowing work. When operating, the hydraulic lever is operated to raise the pretreatment section, and either the left or right side clutch lever is operated to operate the side clutch / brake device to rotate the traveling body,
Furthermore, after the completion of the round trip, the operator has to perform a complicated work of operating the hydraulic lever again to lower the pretreatment section to the vicinity of the field scene, resulting in a heavy burden on the operator.

Therefore, the left and right side clutch levers and the hydraulic lever are integrally formed as one monolever, and the pretreatment section is moved up and down by tilting the monolever in the front-back direction of the traveling machine body, and the left and right sides of the traveling machine body are also operated. When tilted in the same direction, the switch is turned on by the initial tilt to extend the hydraulic cylinder device by a predetermined amount, thereby disconnecting either the left or right side clutch, and further tilting the monolever in the same direction opens the relief valve. A lever device is conceivable in which the throttle is operated to increase the hydraulic pressure, whereby the hydraulic cylinder device is further extended to brake and actuate the side brake.

(C) Problems to be solved by the invention However, in the lever device, in order to tilt the monolever in the front-back and left-right directions of the traveling machine body, for example, the lever is attached to the rotation base member that can be rotated only in the left-right direction. The members must be used in combination so that they can be rotated only in the front-rear direction, but when the mono-lever is tilted largely in the left-right direction of the traveling machine to operate the relief valve, a large force by the lever is required. And Therefore, the connecting portion between the rotating base member and the lever member must have a solid structure, which complicates the structure of the lever device and increases its shape, which may impair compactness of the device. is there.

Therefore, in the present invention, the rotation base member and the lever member are connected so that the flat portions thereof are in contact with each other, and the force is transmitted between the flat portions when the monolever is operated. It is an object of the present invention to provide a lever device that solves the above problem.

(D) Means for Solving the Problems The present invention has been made in view of the above circumstances, and for example, as shown in FIG. 1, the operating lever 3 is installed so as to be swingable in the left-right direction of the traveling machine body. The rotary base member 19 and a lever member 17 mounted on the rotary base member 19 so as to be swingable in the front-back direction of the traveling machine body are provided.
Connected to the relief valve 46, and the rotation base member 1
9 and the supporting member 26, 17a having the flat surface portion 26b, 17c on the lever member 17, respectively, is installed, and the supporting member 26, 17a is fixed on the respective flat surface portion 26b,
17c are connected so as to embrace each other. Then, a pivot pin 29 is inserted through the support member so as to pass through the flat portions, and the flat portions 26b and 17c are engaged with each other when the operation lever 3 is swung in the lateral direction of the machine body.
The lever member 17 and the rotation base member 19 are moved integrally with each other, and when the operation lever 3 is swung in the longitudinal direction of the machine body, the flat portions 26b and 17c are moved about the pivot pin 29. The lever member 17 is slidably contacted to swing the lever member 17 with respect to the rotation base member 19.

(E) Action Based on the above configuration, during work such as mowing by the work vehicle,
When the operation lever 3 is tilted, for example, in the left-right direction of the traveling machine body by attempting to rotate the traveling machine body or the like, the rotary base member 19 and the lever member 17 have their respective flat surface portions 26.
Since b and 17c are connected in a state of hugging each other,
The operation load from the lever member 17 is accurately transmitted to the rotation base member 19 via the flat portions 17c and 26b.

When the operation lever 3 is tilted in the front-rear direction of the machine body, the lever member 17 swings around the pivot pin 29 while being guided by the flat portions 26b and 17c slidingly contacting each other.

(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 provided facing each other in the lateral direction of the machine body with a space provided therebetween, and cylindrical holes 26a, 26a are formed in the support members 26, 26, respectively. A prismatic base 17a is formed at the lower end of the lever member 17, and an oval hole 17b is formed through the base 17a in the lateral direction of the machine body. The base 17a is a support member. 26, 26, and the flat portions 17c, 17c of the support members 26, 26
Of the hole 2 while being in contact with the flat portions 26b, 26b facing each other.
6a and the hole 17b are penetrated by a shaft 29 having chamfered portions 29a, 29a formed at both ends of the link member 27, whereby the lever member 17 and the rotation base member 19 are connected. Further, the leaf springs 3 are attached to the fixing members 23 and 25.
0 and 30 are respectively bolted to urge and support the vicinity of the lower end portion of the lever member 17 from the front-rear direction of the traveling body, thereby releasing the hand when swinging the lever member 17 in the directions of arrows A and B. Thus, when the lever member 17 is released, the lever member 17 can always return to the central neutral position. Further, as shown in FIG. 3, the leaf springs 30, 30 are
It is housed inside the rubber boot 8 in order to effectively use the narrow space. Then, the rotation base member 19 is mounted on the lever member 17, and the two rotation plates 32, 32 and the return spring 33 are fitted into the boss portion 20, and the boss portion 20 is attached to the boss portion 20. Mating hole 1
It is rotatably fitted to a pin 31 (see FIG. 3) fitted and erected on 1a. At this time, the two rotating plates 32, 3
The stopper pin 12 is inserted into the gap 35 formed at one end of each of the two, and the rotating plates 32, 32
Gap 36 formed at each other end (see FIG. 2)
The operation pin 22 is inserted in the. Further, a rotary switch 37 for actuating a valve for switching the left and right side clutch / brake devices by its ON operation is fixed to the back surface of the rotary base member 19 via a 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 the lever member 17 is transmitted to the link member 27 as a rotary motion in the direction of the arrow C, and the pin 45 further presses the bar member 42 to rotate the link member 40.
Turn on the rotary switch 16 to lower the pretreatment section,
When the monolever 3 is tilted in the arrow B direction, the link member 27 rotates in the arrow D direction to release the link member 40,
By the urging force of the return spring 41, the shaft 14 is rotated in the opposite direction to the previous one, the rotary switch 16 is turned on, and the pretreatment unit is moved up.

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. Then, when the monolever 3 is tilted to the left or right, the rotary switch 37 is turned on by the initial tilt and the switching valve for the side clutch / brake device is actuated. Disconnect. 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 rotates about the pin 47, and one relief valve is squeezed through a wire or the like to increase the hydraulic pressure. Therefore, the hydraulic cylinder device further extends to brake the side brake. Works,
Therefore, the combine goes around. At this time, a large force is required to squeeze the relief valve, but the lever member 17 and the rotation base member 19 that form the monolever 3 contact the respective flat surface portions 17c, 17c and 26b, 26b. Since the force is transmitted by being rotated in this state, the pressure is received on the entire surface, and thus the strength of the connecting portion of the monolever 3 is improved. Then, loosen the force of the hand, the leaf spring 3
When the mono lever 3 is returned to the neutral position by the urging force of 0, the hydraulic cylinder device for the side clutch / brake device is contracted to release the side brake, and then the side clutch is connected. Further, the monolever 3 is attached to the arrow A in FIG.
When tilted in the direction, the lever member 17 and the link member 2
7 rotates, the pin 45 rotates in the direction of arrow C, presses the bar member 42, and rotates 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.

Next, a second embodiment in which the structure of the device is slightly modified will be described with reference to FIGS. 4 to 6.

The operation console 51 erected in front of the driver's seat of the combine
As shown in FIG. 6 and FIG. 6, the operation panel 52 on the upper surface thereof
A monolever 53 is provided upright. In addition, the operation console 51
Manual side clutch levers 55, 55 are installed on both sides of the vehicle so as to be rotatable in the front-rear direction of the traveling machine body. Further, a shaft 56 is fixedly provided inside the operation console 51, and one end of a manual side clutch lever 55 is fixed to a pipe 57 fitted to the shaft 56. Further, a mounting plate 59 is erected and fixed on the shaft 56 in the vertical direction of the machine body, and the lever bracket 6 is mounted on the mounting plate 59.
0 is fixed. In the figure, 61 is a rubber boot.

On the other hand, the monolever 53 comprises a lever member 62 and a rotation base member 63, and the rotation base member 63 has a boss portion 65 so as to project to one side of the substantially central portion thereof. A bar member 66 is hung and fixed at one end facing downward. Further, a prismatic support member 67 is fixed to the other end of the boss portion 65, and a hole 67a is formed in the support member 67 in the lateral direction of the traveling machine body. Protrudes to one side of the operation pin 69
Is fixed, and a guide plate 70 is fixed facing upward of the operation pin 69. Further, the lever member 62 has a support member 71 fixed to the lower end portion thereof, and pipes 72 and 73 having flat surface portions 72a and 73a at both ends of the support member 71, respectively.
3a are fixed so as to face each other, the lever member 62 sandwiches the support member 67 from both sides by the pipes 72 and 73, and the flat surface portions 72a and 73a and the flat surface portion 67b of the support member 67 are in close contact with each other. The lever member 62 and the rotation base member 63 are connected by penetrating the grooves 72b and 73b of the pipes 72 and 73 and the hole 67a of the support member 67 with the shaft 74. The pipe 72,
Instead of 73, a prismatic steel material shown by a dashed line in FIG. 4 may be used. Further, a crank-shaped arm 75 is fixed to the pipe 73, and microswitches 76 and 78 having sensor portions 76a and 78a are installed on the front and back surfaces of the tip of the arm 75, respectively. There is.
On the other hand, a plate member 79 in which a bolt 77 is planted is fixedly attached to the lower side surface of the rotating base member 63, and a sensing plate having bent portions 80a and 80b formed at both ends of the plate member 79. 80 through the holes 80c, 80c bolt 7
7, 77 and nuts 8 on the bolts 77, 77.
It is fixed by screwing 1, 81 together. Furthermore,
The holes 80c, 80c of the sensing plate 80 have a diameter of bolts 77, 7
7 is formed larger than the diameter of 7, and the bent portion 80
A nut 82 is fixedly provided at a position corresponding to the sensor portion 78a of the micro switch 78 of a. Therefore, when the sensing plate 80 is attached to the plate member 79, the lever member 62 is fully loaded in the direction of arrow F in FIG. When the sensor portion 76a of the micro switch 76 is turned on, the nuts 81 and 81 are fastened, and the bolts 83 are screwed into the nuts 82 to fully fill the lever member 62 in the direction of arrow E in FIG. When tilted, the sensor unit 78a of the micro switch 78 is adjusted to be turned on. As a result, the micro switch 7
The operation adjustment of 6, 78 can be easily performed only by moving one sensing plate 80, and the switches 76,
Even if the mounting position of 78 is slightly different, it can be easily dealt with by moving the sensing plate 80.
Since the 78 can be appropriately turned on / off by one sensing plate 80, the structure of the lever device can be simplified and made compact. Further, fixing members 85, 85 are installed inside the rubber boot 61 below the lever member 62 so as to face each other in the front-rear direction of the traveling machine body, and the fixing member 8 is provided.
Leaf springs 86 and 86 are bolted to 5 and 85, respectively, and the lever member 62 is urged by these leaf springs 86 and 86 so as to be returned to the neutral position in the free state. Further, the leaf springs 86, 86 are the rubber boots 6.
Since it is housed inside 1, the limited space of the lever device can be effectively used and the leaf spring 86
The operating load of the monolever 53 can be easily adjusted by changing the number of sheets.

Further, as shown in FIG. 5, a valve operation member 87 is installed below the rotation base member 63 so that the central portion thereof is rotatably supported by a pin 89, and the valve operation member 87 is provided.
An engaging portion 91 is formed by installing two pins 90, 90 at a predetermined interval at the upper end of the engaging portion 91, and the bar member 66 is inserted into the engaging portion 91.

Since the present embodiment is configured as described above, when the traveling machine body is circulated by a combine harvesting operation or the like, the leaf spring 86 is located in front of the monolever 53, that is, in the direction of arrow E in FIG.
Tilt against. Then, the lever member 62 moves the arm 7
The micro switch 78 is rotated toward the bent portion 80a of the sensing plate 80 via 5, so that the sensor portion 78a of the switch 78 comes into contact with the tip of the bolt 83 to be turned on.
Based on this, the pretreatment unit rises. Conversely, when the monolever 53 is tilted in the direction of arrow F in FIG. 4 against the leaf spring 86, the lever member 62 causes the arm 75 to rotate toward the bent portion 80b of the sensing plate 80. As a result, the sensor portion 76a of the micro switch 76 comes into contact with the bent portion 80b and is turned on, and based on this, the pretreatment portion is lowered. In this case, since the microswitches 76 and 78 are installed back-to-back in the vicinity of the pivot base of the lever member 62 by the arm 75, the space for mounting the switch is reduced and the lever member 62 swings. The movement of time is small, and therefore the switches 76, 7
The movement of the wiring to 8 can be reduced, and it is possible to prevent problems such as disconnection due to the ON / OFF operation by moving the switches 76 and 78 themselves. Then, this time, when the monolever 53 is tilted in the direction in which the monolever 53 is going to rotate to the left or right, the initial tilt causes the rotary switch for detecting the rotation base member 63 to be turned on, and the switching valve for the side clutch / brake device to be operated. First, disconnect either the left or right side clutch. Then, when the monolever 53 is further strongly tilted in the same direction, the rotation base member 63 rotates together with the lever member 53 to move the bar member 66 to the pin 90.
The valve operating member 87 is rotated by abutting against and pressing the valve operating member 87, whereby one relief valve is squeezed through a connecting and closing means such as a wire to increase hydraulic pressure to further extend the cylinder device, Braking and operating the brake. At this time, in the monolever 53, the lever member 62 and the rotation base member 63 are
The flat portions 72a and 73a of the pipes 72 and 73 and the support member 6
Since the flat portions 67b, 67b of No. 7 are connected by being in close contact with each other, a large force at the time of operating the lever member 62 is supported by the entire flat portion, and its strength is increased.

On the other hand, another embodiment will be described with reference to FIGS. 8 and 9 in which the main lever can be refueled while the monolever is still installed on the operation console.

As shown in FIG. 7, the monolever 3'has an oil supply passage 95 formed from the upper grip portion 3'a to the lower portion of the lever member 17 ', and the lower portion is filled with the oil supply passage 95. Nozzle 9 so that the poured oil can be poured into the lever rotation part.
6 is provided. Therefore, without removing the monolever 3'from the operation console, the grip portion 3'is removed by the oiler 97.
By pouring oil from a, it is possible to easily supply oil to the rotating portion.

Further, as shown in FIG. 8, an oil sump 99 is formed inside the grip portion 3 ″ a of the monolever 3, and a return spring 100 is provided in the oil sump 99, and the spring 100 is used for refueling. The push button 102 having the check valve 101 is urged upward to normally close the opening 103 so that the push button 10 can be pressed when refueling.
By pressing 2 against the urging force of the spring 100, the oil in the oil sump 99 is pressure-fed to the oil supply passage 105, and the oil is poured from the nozzle 106 to the rotating base of the monolever 3 ″ so that the oil can be easily supplied. You may.

(G) Effect of the Invention As described above, according to the present invention, the rotation base member 19 provided with the support members 26, 26 having the flat surface portion 26b,
Since the lever member 17 provided with the support member 17a having the flat surface portions 17c and 17c is connected so that the respective flat surface portions 26b and 17c embrace each other, the relief valve 46 has a simple structure. Even when a large operation load is applied to the monolever 3 as when the lever is operated for the operation of the flat parts 26b and 17c.
They can be firmly supported and transmitted by abutting each other, and the monolever 3 can be used in a limited space for the lever device.
Can be installed efficiently and its strength can be improved.

Further, when swinging the monolever 3 in the longitudinal direction of the machine body, since the flat portions 26b and 17c are slidably contacted with each other about the pivot pin 29 to swing the lever member 17 with respect to the rotary base member, the lever member 17 is swung. The 17 is supported by the pivot pin 29 while being guided by the flat portions 26b and 17c and is swung, so that stable, accurate and reliable operation can be performed.

Further, when the lever member 17 is configured to be biased in the front-rear direction of the traveling machine body by the leaf springs 30 installed on the rotation base member 19, the action point of the biasing force when the monolever 3 is bent is the lever member 17 side. The bent portion can be made compact by this, and the monolever 3 can be made compact by effectively utilizing the narrow space in the rubber boot 8 of the lever device, and the number of leaf springs 30 can be changed. This makes it possible to easily change the operating load of the monolever 3.

Further, the support members 17a and 26 are prismatic, and one support member 26 of the rotation base member 19 is sandwiched between the two support members 17a of the lever member 17, or the lever member 1
Since one supporting member 17a of No. 7 is configured to be sandwiched by two supporting members 26 of the rotating base member 19, the operating load at the time of operating the lever is evenly distributed in the rotating unit,
The strength of the monolever 3 can be improved.

[Brief description of drawings]

FIG. 1 is an assembly view showing a lever device according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a side view thereof, and FIG. 4 is an assembly view showing a lever device of another embodiment, and FIG. Is a front view thereof, and FIG. 6 is a side view thereof. 7 and 8 are side views showing still another embodiment of the lever device. DESCRIPTION OF SYMBOLS 1 ... Operation base, 3 ... Operation lever (mono lever), 17 ... Lever member, 17a ... Support member (base part), 19 ... Rotation base member, 26 ... Support member, 17c, 26b ... Plane part, 29 ...
Pivot pin (shaft).

Claims (3)

[Scope of utility model registration request] 1. A lever device for a working vehicle, wherein an operating lever is installed on a console so as to be tiltable in the lateral direction of the traveling machine body and in the longitudinal direction of the traveling machine body, and the operating lever is swingable in the lateral direction of the traveling machine body. The rotary base member is installed, and a lever member is installed on the rotary base member so as to be swingable in the front-back direction of the traveling machine body.
The rotation base member is connected to a relief valve, and the rotation base member and the lever member are respectively provided with support members having flat portions, and the support members are arranged such that the flat portions are mutually hugging. A pivot pin is inserted through the support member so as to pass through the flat portions while being connected to each other, and when the operation lever is oscillated in the left-right direction of the machine body, the flat portions contact each other so that the lever member and the rotary member are rotated. The moving base member is integrally moved, and when the operation lever is rocked in the longitudinal direction of the machine body, the flat surface portions are slidably contacted with each other about the pivot pin to move the lever member to the rotation base member. A lever device in a working vehicle that swings. 2. The lever device for a working vehicle according to claim 1, wherein the lever member is biased in the front-rear direction of the traveling machine body by a leaf spring installed on the rotating base member. 3. The supporting member has a prismatic shape, and one supporting member of a rotating base member is sandwiched between two supporting members of a lever member, or one supporting member of a lever member is rotated. The lever device for a working vehicle according to claim 1, wherein the lever device is configured to be sandwiched by two supporting members of the base member.