JPH0736Y2 - 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, a pre-processing unit and a side clutch based on a tilting operation of a traveling machine body in a front-rear direction and a left-right direction. The present invention relates to a lever device including an operating lever that can operate each brake device.

(B) Conventional Technology Conventionally, in a work vehicle, for example, a combine, a side clutch / brake device is appropriately actuated to steer a traveling body by tilting left and right side clutch levers provided on an operation console. .

However, since the combine harvester described above must operate the hydraulic lever separately from the side clutch lever when the pretreatment section is moved up and down, when the combine harvester is circulated by reaching the end of the field during mowing work. Operates the hydraulic lever to raise the pretreatment section, and operates either the left or right side clutch lever to operate the side clutch / brake device to rotate the traveling body,
Furthermore, after the rounding operation, the operator has to perform a complicated operation of operating the hydraulic lever again and lowering the pretreatment section to the vicinity of the field scene, resulting in a heavy burden on the operator.

Therefore, the applicant of the present invention operates the side clutch / brake device based on the tilting operation of one operating lever erected on the operation console in the left-right direction of the traveling machine body and the tilting operation in the front-back direction of the traveling machine body. Based on this, an operating lever device has been devised which is configured to raise and lower the pretreatment section (see Japanese Patent Laid-Open No. 61-67672).

The operating lever device operates the hydraulic actuator for the left or right side clutch to disconnect the side clutch based on the tilt angle detected by the potentiometer when the operating lever is operated in the lateral direction of the traveling machine body. However, the left or right side brake hydraulic actuator is actuated based on the further tilting of the operating lever in the same direction, and due to the relief pressure that changes according to the voltage change in the potentiometer, the larger the force to tilt in the same direction. The side brake is braked and operated, and the operating lever is operated in the front-back direction to turn on the raising switch or lowering switch, which expands and contracts the hydraulic actuator for raising and lowering the pretreatment unit, and raises and lowers the pretreatment unit. Is configured to control.

(C) Problems to be Solved by the Invention However, in the above-described operation lever device, even when the maximum tilt angle (neutral range) in which the raising and lowering switches are not turned on when the operation lever is tilted is the side clutch. Since the same configuration is used at the position tilted to the left or right to operate the brake, if the operator is in the turning state by tilting the operating lever to the left or right, it is only intended to operate the operating lever to the left or right. The operator also loses the balance due to vibration of the rotating machine body, etc., and the lever with his hands accidentally tilted in the front-back direction raises the pretreatment section against the intention. Or, it tends to cause a problem of falling. In addition, if the maximum tilting angle of the operation lever in the neutral area in the front-rear direction is set to a large value in order to eliminate the above-mentioned trouble, the tilting operation angle is too large in the ordinary single operation of the pretreatment section raising / lowering operation. If the processing unit is moved up quickly, there will be a problem that a quick response cannot be made.

(D) Means for Solving the Problems The present invention is intended to solve the above problems, and for example, referring to FIGS. 1 and 2, the operation lever (3) is , The traveling machine body is installed so as to be tiltable in the left-right direction and the front-back direction, and based on the tilting operation of the operation lever (3) in one direction in the left-right direction or the front-rear direction, the pre-processing unit actuator is operated to move the pre-processing unit up and down. In a lever device for a working vehicle, which is operated and operates a side clutch / brake actuator by actuating a side clutch / brake device based on a tilting operation in the other direction, tilting of the operation lever (3) in one direction A tilt angle detecting means (16) for detecting an angle is installed, and based on the detection of the tilt angle detecting means (16), a neutral area in one direction of the operation lever (3) at the tilt position in the other direction is set. In which it characterized in that a neutral zone control means (66) be set to spread in response to stepwise tilting of the said other direction.

(E) Operation Based on the above-described configuration, when the work vehicle is traveling, only the pretreatment section is raised (or lowered) by tilting the operation lever (3) in one direction in the longitudinal direction or the lateral direction of the machine body at the neutral position. The pre-treatment section actuator is actuated, and the traveling machine body is rotated. The side clutch / brake actuator is actuated based on tilting of the operating lever (3) in the other direction, thereby disengaging the side clutch. Then, brake and operate the side brakes. Then, the pretreatment unit is raised (or lowered) when the traveling aircraft is traveling.
In order to tilt the operating lever (3) in one direction,
The neutral area control means (66) based on the lever detection of the tilt angle detection means (16) is set so that the neutral area in one direction of the operating lever (3) widens in a stepwise manner corresponding to the tilt amount in the other direction. Therefore, the pretreatment unit is raised (or lowered) by tilting the operation lever (3) in one direction to a greater extent than when the operation lever (3) was in the neutral position.

Note that the reference numerals in parentheses do not limit the configuration in any way.

(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 FIG. 3, an upper surface thereof is an operation panel 2, and a monolever 3 is erected on the operation panel 2, and various operation switches, meters and display lamps are arranged. Safety arms 5, 5 are installed on both sides of the operation console 1. Further, a shaft 6 is fixedly provided inside the operation console 1, and one end of the safety arm 5 is fixed to a pipe 7 fitted to the shaft 6. Further, a mounting plate 10 is erected vertically on the shaft 6 and fixed to the shaft 6, and a lever bracket 11 is fixed to the mounting plate 10. In the figure, 8 is a rubber boot.

Further, as shown in FIG. 2, the lever bracket 11 is formed in an L-shape, has a fitting hole 11a and a bolt hole 11b, and has a stopper pin 12 at one end thereof.
Is fixed so as to project to one side. 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. ing. Further, the shaft 14 of the pretreatment rotary switch 16 is inserted into the boss portion 13 through the fixing plate 15, and the rotary switch 16 is further inserted.
The flange portion 16a is bolted to the fixing plate 15. On the other hand, one end of the monolever 3 is attached to the rotary base member 19, and the rotary base member 19 has a boss portion 20 so as to project to one side at a 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 installed at 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 at predetermined intervals. The support members 26, 26 are provided with cylindrical holes 26a, 26a, respectively. Also.
A prismatic base 3a is formed at the lower end of the monolever 3, and an oval hole 3b is formed through the base 3a in the lateral direction. The base 3a of the hole 3b is a support member 26. In the state in which the link member 27 is fitted between the two, 26, the shaft 29 having chamfered portions 29a, 29a formed on both sides of the tip of the link member 27 is penetrated, whereby the monolever 3 and the rotating 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 monolever 3 from the front-rear direction of the traveling machine body, and when the monolever 3 swings in the directions A and B, It is configured so that it can always return to the central neutral position when released and released. The rotation base member 19 has the monolever 3 mounted thereon and two rotation plates.
With the bosses 20 fitted into the bosses 20, the bosses 20 are fitted into the fitting holes 11 of the lever bracket 11.
It is rotatably fitted to a pin 31 (see FIG. 3) provided upright on a. At this time, the stopper pin 12 is inserted into the gap 35 formed at one end of each of the two rotary plates 32, 32, and the gap formed at the other end of each of the rotary plates 32, 32 is inserted. The operation pin 22 is inserted therein. Further, a steering rotary switch 37 for actuating a switching balf for the left and right side clutch / brake devices is mounted on the back surface of the rotary base member 19 via a plate 39. In the rotary switch 37, the pin 37b of the fixed portion 37a is fitted into the hole 39a of the plate 39, and the pin 37d of the movable portion 37c is fitted into a hole (not shown) on the rear surface of the rotary base member 19. , Rotation base member 19, that is, monolever 3
When is swung in the C and D directions, the movable portion 37c is configured to rotate in the same direction.

Further, the boss portion 13 of the lever bracket 11 has a link member
The shaft portion 40a of the shaft 40 is fitted into the rotation eyepiece with the return spring 41 interposed, and the shaft 14 of the pretreatment rotary switch 16 is fitted into the shaft portion 40a from below. Further, the pin 45 provided on the shaft 29 is abutted on the bar member 42 installed across both ends of the link member 40 via the plate 43 so as to be orthogonal to each other. Therefore, when the monolever 3 is tilted in the direction of arrow A in FIG. 2, the tilting motion is transmitted to the link member 27 as a rotating motion in the direction of arrow E, and the pin 45 pushes the bar member 42 to rotate the link member 40. When the rotary switch 16 for pretreatment is turned on to lower the pretreatment section by moving the monolever 3 and the monolever 3 is tilted in the direction of arrow B, the link member 27 is rotated in the direction of arrow F to rotate the link member.
40 is released, the shaft 14 is rotated in the opposite direction to the previous one by the urging force of the return spring 41, the rotary switch 16 is turned on, and the pretreatment section is moved up.

On the other hand, as shown in FIG. 3, a valve operating member 46 is installed below the rotary base member 19 so that the central portion thereof is rotatably supported by a pin 47, and the valve operating member 46 is installed at the upper end of the valve operating member 46. Is 2
An engaging portion is formed by installing the individual 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. Therefore,
When the monolever 3 is tilted in the left-right direction of the traveling machine body, the steering rotary switch 37 is turned on to operate the electromagnetic switching valve for the left and right side clutches to disconnect either the left or right side clutch, and the monolever 3 is rotated. When the electromagnetic switching valve for the side brake is operated by further tilting in the direction, the bar member 21 is brought into contact with and pressed against the pin 49 to rotate the valve operating member 46. The relief valve is throttled through the valve to increase the relief pressure so that the side brake is braked / operated in accordance with the tilt angle of the lever 3. In the figure, 17 is a grip and 50 is a lead wire.

Further, the pretreatment rotary switch 16 and the steering rotary switch 37 have the same structure, and as shown in FIG. 6, the steering rotary switch 37 (or the pretreatment rotary switch 16) is A fixed portion 37 that includes a movable portion 37c that rotates in association with the tilting movement of the monolever 3 and a brush 38 that is attached to the movable portion 37c, and that is fixed to the operation console side.
The left brake switch 37e consisting of an arc-shaped contact piece is shown in a.
(Or the pretreatment section raising switch 16e), the right brake switch 37h (or the pretreatment section lowering switch 16h), the left clutch switch 37f (or the pretreatment section raising switch 16f), the right clutch switch 37g (or the pretreatment section lowering switch 16g). )have. Further, the brush 38 is grounded, and the switches 37e, 37f, 37g, 37h (16e, 16f, 16g, 16h) are connected to the respective signal sides. Therefore, when the monolever 3 is tilted in the left-right direction, the left (or right) side clutch is disengaged by turning on the left clutch switch 37f (or the right clutch switch 37g) of the steering rotary switch 37, and Further tilting of the monolever 3 in the same direction causes the left brake switch 37e (or the right brake switch 37h) to be turned on so that the left (or right)
It is configured to brake and operate the side brakes. Further, when the monolever 3 is tilted in the front-rear direction and before the side clutch is disengaged, the raising switch 16f (or the lowering switch 16g) of the pretreatment lifting rotary switch 16 is performed.
Is turned on, the pretreatment section is raised (or lowered), and after the side clutch is disengaged, the raising switch 16e (or lowering switch 16h) is turned on and the pretreatment section is raised (or lowered). Is configured to.

Further, as shown in FIG. 1, a microcomputer (hereinafter, referred to as a microcomputer) 51 mounted on the traveling machine body includes a left brake switch 37e, a left clutch switch 37f, a right clutch switch 37g, and a right brake switch of the steering rotary switch 37. 37h, ascending switch 16e, ascending switch 16f, descending switch 16g, descending switch of rotary switch 16 for pretreatment
16h are respectively connected to the input ports of the CPU 56 via the input interface 55. Further, the CPU 56 via the output interface 57, the left and right solenoids 59, 60 of the side clutch electromagnetic switching valve, the left and right solenoids 61, 62 of the side brake electromagnetic switching valve, and the pretreatment electromagnetic switching valve lifting solenoid 63. The lowering solenoids 65 are connected to each other.

Further, the CPU 56 is provided with a neutral range control means 66, which receives a signal from the steering rotary switch 37 and raises and lowers the pretreatment section until the side clutch is disengaged. Is performed by the ascending switch 16f and the descending switch 16g, and after the side clutch is disengaged, the pretreatment section is moved up and down by the ascending switch 16e and the descending switch 16h. Therefore, when operating the monolever 3 in the steering neutral region or the left and right side clutch regions,
As shown in FIGS. 5 and 5, the horizontal axis represents the working angles α and β detected by the steering rotary switch 37 when the monolever 3 is tilted in the left-right direction, and the vertical axis represents the longitudinal angle when the lever 3 is tilted in the front-rear direction. Assuming that the working angles are A and B detected by the pretreatment rotary switch 16, the steering neutral region α _{1 to} β in which the monolever 3 is released to the reference position (intersection of c and c ′) or slightly tilted left and right. in between ₁ neutral zone without activating the pre-processing unit with the lever front-back direction is set between the operating angle a ₁ .about.B _1, also left clutch, left clutch zone alpha ₂ and the right side clutch is disconnected In the right side clutch area β ₂ , the neutral area in the front-rear direction of the monolever 3 is the working angle A ₂
Is set between .about.B _2, neutral zone at the front and rear direction by the left and right operating position of Monoreba 3 is configured so as to spread in a stepwise manner.

Since the present embodiment is configured as described above, when the traveling machine body travels when reaching the field end, for example, when performing harvesting work with a combine, first the monolever 3 is in the front, that is, in the direction of arrow B in FIG. Tilt. Then, the link member 27 is rotated together with the shaft 29, whereby the pin 45 is rotated in the arrow F direction in FIG. 2 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 in the moving direction of the pin 45 while contacting the pin 45, whereby the shaft 14 of the pretreatment rotary switch 16 is rotated.
Turns in the same direction and is turned on. Based on this, the raising solenoid 63 is excited to extend the hydraulic actuator for raising and lowering the pretreatment section, and the pretreatment section is raised. Also,
When the monolever 3 is tilted to the left or right, the brush 38 comes into contact at the position shown in FIG. 6C (or a), and the left clutch switch 37f (or the right clutch switch 3).
7g) is turned on, the left solenoid 59 (or right solenoid 60) of the side clutch switching valve is excited based on this, and the left (or right) side clutch is disconnected.

Then, when the monolever 3 is further tilted in the same direction, the turning portion 37c of the steering rotary switch 37 is further turned, and this time the left brake switch 37e is moved to the position shown in FIG.
(Or the right brake switch 37h) is turned on, the left solenoid 61 (or the right solenoid 62) of the side brake electromagnetic switching valve is excited, and the side brake operates, but if the lever 3 is further tilted in the same direction in this state. The rotation base member 19 rotates together with the lever 3 so that the bar member 21 abuts and rotates on one of the pins 49, and the valve operating member 46.
Rotates, which increases the relief pressure to extend the hydraulic actuator for the side brake, and the left (or right) side brake is braked and actuated, so that the combine turns.

Further, when the monolever 3 is tilted in the left-right direction and is also operated in the front-rear direction to operate the side clutch / brake device and to raise and lower the pretreatment section, the pretreatment rotary switch 16 and the steering rotary switch 37 are used. The neutral zone is set based on the detection signal input from the neutral zone control means 66. For example, when the monolever 3 is operated only in the front-rear direction without tilting to the left and right (S1), that is, when the left and right clutch switches 37f and 37g are not turned on, the raising switch 16f of the preprocessing rotary switch 16 is turned on. When a control signal based on this signal is issued, the raising solenoid 63 of the pretreatment electromagnetic switching valve is excited to extend the pretreatment hydraulic actuator, whereby the pretreatment section is raised (S3). When the lower switch 16g of the pretreatment rotary switch 16 is turned on (S4),
Based on the control signal based on this signal, the lowering solenoid 65 of the pretreatment electromagnetic switching valve is excited to contract the pretreatment hydraulic actuator, whereby the pretreatment section is lowered (S5). On the other hand, when the amount of tilt of the monolever 1 is small and the left clutch switch 37f and the right clutch switch 37g are not turned on and the lever 3 is tilted in the direction of arrow B in FIG. Signal-based CPU
A signal from 56 excites the solenoid 63 for raising the pretreatment electromagnetic switching valve to extend the pretreatment hydraulic actuator, thereby raising the pretreatment section. Similarly, when the monolever 3 is tilted in the direction of arrow A in FIG. 2, the lowering switch 16g is turned on to contract the pretreatment hydraulic actuator, and the pretreatment section is lowered.

Then, the monolever 3 is tilted in the left (or right) direction to tilt in the direction of arrow B in FIG. 2 at a position beyond the working angle α ₁ (or β ₁ ), that is, in the left side clutch region (right side clutch region). At this time, since the left clutch switch 37f (or the right clutch switch 37g) is turned on at the operating angle α ₁ (or β ₁ ), the neutral zone control means 66 based on this signal causes the pretreatment rotary switch 16 to operate. The ON position in the front-back direction of the lever is set to be turned on by the ascending switch 16e (or the descending switch 16h). Therefore, the monolever 3 moves in the neutral region in the front-rear direction until the flash 38 contacts the ascending switch 16e (or the descending switch 16h), that is, the working angle A ₂ (or B
₂ ) can be extended. Therefore, in this state, when the monolever 3 is tilted in the direction of the arrow B and tilted more than the previous time to turn on the raising switch 16e (S6), the pretreatment unit is raised based on this (S7). Similarly, when the monolever 3 is largely tilted in the direction of arrow A, the lowering switch 16h
Is turned on (S8), and the pretreatment section is lowered (S9). Then, in a state in which neither the raising switch 16e nor the lowering switch 16h is turned on, the pretreatment hydraulic actuator does not operate and the pretreatment unit is stopped (S10).

In this embodiment, the rotary switches 16 and 37 for preprocessing and steering are used to detect tilting movements of the monolever 3 in the front-rear direction and the left-right direction. Instead, a potentiometer may be used.

Further, in the present embodiment, the neutral area in the front-rear direction of the monolever 3 is configured in two stages so as to be switched between the steering neutral area and the left and right silatch areas, but as shown in FIG. The neutral area in the front-rear direction may be switched to three stages of the steering neutral area, the left and right side clutch areas, and the left and right side brake areas to further enhance operability.

(G) Effect of the Invention As described above, according to the present invention, the neutral range control means (66) based on the detection of the tilt angle detection means (16) for detecting the tilt angle of the operation lever (3) in one direction. Thus, the neutral area in one direction of the operating lever (3) at the tilt position in the other direction is configured to be wide in a stepwise manner corresponding to the tilt amount in the other direction, so that the operating lever (3) When the traveling machine body is rotated by tilting in the other direction, the lever (3) unexpectedly tilts in the front-rear direction due to vibration and the like, causing the pretreatment section to rise (or fall). In addition, a small tilt angle is sufficient when the operation lever (3) is operated in only one direction to operate the pretreatment section at the neutral position, so that safety and operability are improved. be able to. Further, since the neutral region of the operating lever (3) spreads in a stepwise manner, the pretreatment is performed regardless of whether it tilts in one direction in the neutral range or tilts in one direction beyond the neutral range. Since the neutral area where the parts are not operated has a constant width in each area, the lifting operation of the pretreatment part can be stably performed.

[Brief description of drawings]

FIG. 1 is a diagram showing an electric circuit according to the present invention, FIG. 2 is a diagram showing a monolever, FIG. 3 is a side sectional view thereof, FIG. 4 is a diagram showing tilting of the monolever in the longitudinal direction, and FIG. FIG. 6 is a diagram showing the tilt angles of the monolever in the front-rear direction and the left-right direction and the spread of the neutral region based on the tilt angles. FIG. 6 is a diagram showing the structure of the steering rotary switch and the pretreatment lifting rotary switch, and FIG. 7 is the present embodiment. It is a flowchart which shows operation | movement of an example. FIG. 8 is a diagram in which the number of stages in the pretreatment neutral zone is further increased. 3 ... Operation lever (monolever), 16 ... Tilt angle detection means (pretreatment elevating rotary switch), 66 ... Neutral range control means.

Claims (1)

[Scope of utility model registration request] 1. An operating lever is installed so as to be tiltable in a left-right direction and a forward-backward direction of a traveling machine body, and an actuator for a pretreatment unit is operated based on a tilting operation of the operating lever in a left-right direction or a front-back direction. Elevate the pretreatment section,
Further, in a lever device in a work vehicle in which a side clutch / brake actuator is actuated to actuate a side clutch / brake device based on a tilt operation in another direction, a tilt angle for detecting a tilt angle in one direction of the operation lever. Detecting means is installed, and based on the detection of the tilt angle detecting means, the neutral area in one direction of the operating lever at the tilt position in the other direction is expanded stepwise in accordance with the tilt amount in the other direction. A lever device in a work vehicle, characterized in that a neutral region control means for setting is provided.