JPH11348809A - Self-propelled working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-propelled working vehicle which can be steered with the use of only one handle through manipulation of a running clutch, a brake and a side clutch so as to enhance the controllability and the workability. SOLUTION: An alternate manipulating device 14 for a running clutch 12 and a brake 13 associated with the rotation of a horizontal part 10a of an inverted T-like handle body 10, which is rotatably supported to a machine body 2, is provided. A coupling handle 29 is tiltable in a direction orthogonal to the rotating direction of the handle body 10, and a side clutch control device 30 is associated with the tilt motion of the coupling handle 29 part. Preferably, the running clutch 12 part and the brake 13 part are provided therein with an operating position holding device 25, 31, respectively, and further, preferably, the tilting direction of the coupling handle 29 is coincident with the operation direction of the side clutch on the operating direction side of the machine body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled work vehicle used in a field, an orchard, and the like, with improved operability and workability.

[0002]

2. Description of the Related Art Conventionally, self-propelled work vehicles have been used for spraying chemicals, fertilizers and the like in fields, orchards, and the like, and for various other works. When the self-propelled work vehicle is provided with a crawler-type traveling device, for example, many control levers such as a traveling clutch lever, a brake lever, a side clutch lever, a speed change lever, and a forward / reverse switching lever are provided.

[0003] Therefore, the operator must operate many levers during the operation, and must be extremely careful about the operation and running on slopes and narrow places. It could not be said that there was no effect on gender.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and enables the steering by operating a traveling clutch, a brake, and a side clutch with a single handle, thereby improving operability and workability. It is an object of the present invention to provide a self-propelled work vehicle with improved operability.

[0005]

According to a first aspect of the present invention, there is provided a self-propelled work vehicle, wherein a horizontal portion of an inverted T-shaped handle body is rotatably supported by an airframe. An alternate operating device of a traveling clutch and a brake interlocked with the rotation of the horizontal portion is provided, and a connection handle is provided at an upper end of a vertical portion of the handle main body, which can be tilted in a direction intersecting with the rotation direction of the horizontal portion, A side clutch control device is provided which is linked to the tilting of the connecting handle portion.

According to this configuration, the traveling clutch, the brake and the side clutch are operated by one handle, specifically, an inverted T-shaped handle main body and a connecting handle integrally provided at an upper end of a vertical portion thereof. be able to.

A self-propelled work vehicle according to a second aspect of the present invention has a configuration in which an operating position holding device is provided in each of the traveling clutch unit and the brake unit. According to this configuration, the connection of the traveling clutch is performed at the same time as the release of the brake.In this case, the released state of the brake and the connected state of the traveling clutch are maintained. In this case, the disconnected state of the traveling clutch and the applied state of the brake are automatically maintained.

According to a third aspect of the present invention, the self-propelled work vehicle has a configuration in which a tilting direction of the connecting handle and a side clutch operation in a steering direction side of the body are matched. According to this configuration, the steering operation can be performed only by tilting the connection handle toward the body steering direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a crawler sprayer 1 as an embodiment of a self-propelled work vehicle according to the present invention.
It is shown. The crawler sprayer 1 is used for spraying chemicals, fertilizers, and the like. The crawler sprayer 1 is provided with a foldable nozzle mast 3 at a front end of a body 2, and a chemical solution tank 4, an engine 5, and a fuel tank are provided on the body 2. 6. Although not shown, a chemical pump, various transmission devices and traveling devices, and other necessary devices are mounted.

Further, a fixed handle 7 is provided at the rear end of the machine body 2. Conventionally, the fixed handle 7 is provided with a traveling clutch lever, a brake lever, two left and right side clutch levers, and other various control levers. Many were provided. In the figure, reference numeral 8 denotes a shift lever, and reference numeral 9 denotes a forward / reverse switching lever.

In the present invention, the conventional traveling clutch lever, brake lever and two left and right side clutch levers are integrated into one.

In the embodiment of the drawing, as shown in FIG.
First, a horizontal portion 10a of an inverted T-shaped handle main body 10 is rotatably supported by the machine body 2. That is, a support 1 that is erected at predetermined intervals on both the left and right sides of the body 2
Both ends of the horizontal portion 10a are inserted between the first and the first 11, and the horizontal portion 10a is supported rotatably in the front-rear direction of the body 1.

Further, an alternate operating device 14 for the traveling clutch 12 and the brake 13 from the horizontal portion 10a is provided. Here, the alternating operation device 14 can be brought into a state in which the traveling clutch 12 is connected at the same time as the release of the brake 13, and conversely, the brake 13 is applied at the same time as the release of the traveling clutch 12. Say the device.

First, the traveling clutch 12 will be described. In the embodiment shown in the drawings, the traveling clutch 12 is a belt tension clutch, and is loosened between the engine pulley 15 of the engine 5 and the transmission pulley 17 of the transmission 16. The V belt 18 is suspended,
The driving force of the engine 5 is transmitted to the transmission 16 by pressing and tensioning the tension roller 19 against the belt 18.

In the present invention, the pressing of the tension roller 19 against the V-belt 18 is caused by the rotation of the horizontal portion 10a of the handle main body 10, and in the illustrated embodiment, the rotation of the body 2 in the forward direction. It is configured to be performed by.

That is, the bracket 20 is projected forward from the horizontal portion 10a of the handle body 10,
A substantially intermediate portion of the bracket 20 and a tension bar 21 to which the tension roller 19 is attached at the tip is connected by a clutch link 22.

The upper and lower ends of the clutch link 22 are connected to the bracket 20 and the tension bar 21 respectively.
The other end of the tension bar 19, which is pivotally connected to each other by pins 23, 23, and which is opposite to the mounting portion of the tension roller 19 attached to the swinging tip of the tension bar 21, is similarly positioned at an appropriate position on the body 2 side. Are pivotally connected.

In the above construction, the handle body 10
When the horizontal portion 10a is rotated forward of the machine body 2 by gripping a connecting handle 29 described later, the tension roller 19 side of the tension bar 21 is lowered via the bracket 20 and the clutch link 22. The tension roller 19 presses the V-belt 18, and the V-belt 18 is tensioned, so that the engine 5
Power is transmitted from the transmission to the transmission 16.

Further, an operation position holding device 25 is provided on the traveling clutch 12. This operation position holding device 2
Reference numeral 5 denotes a device that works so that when the traveling clutch 12 is connected, the connected state is maintained as it is, and when the traveling clutch 12 is released, the released state is maintained as it is. .

More specifically, one end 26 of a tension spring 26 for a clutch is placed at a suitable position in the middle of the tension bar 21.
a, and the other end 26b is engaged with the body 2 behind a neutral point (dead point) of the tension bar 21, that is, behind an end 21a of the tension bar 21 opposite to a portion where the tension roller 19 is mounted. To wear.

With the above configuration, the tension bar 21
Together with the tension roller 19
When tilted to the side, the tension roller 19 is pressed by the V-belt 18 by the action of the tension spring 26, and the V-belt 18 is tensioned.
Power is transmitted from the transmission to the transmission 16.
Unless the tension bar 21 and the tension roller 19 are returned to the initial neutral position artificially,
The state is maintained by the over dead center mechanism.

Next, when the horizontal portion 10a of the handle main body 10 is artificially rotated in the rearward direction of the body 2, the tension bar 21 and the tension roller are connected via the bracket 20 and the clutch link 22. When the traveling clutch 19 is moved to the opposite side (upward) of the V-belt 18 and exceeds the neutral point (dead point) of the tension bar 21, the state in which the traveling clutch 12 is disengaged by the action of the clutch tension spring 26. It is held by the over dead center mechanism as described above.

Next, a description will be given of the brake 13 which constitutes the alternate operating device 14 together with the traveling clutch 12. Although the details of the internal structure of the brake 13 are not shown, for example, an internal expansion type drum brake is used. As with the traveling clutch 12, the driving clutch 12 is configured to be operated in conjunction with the rotation of the horizontal portion 10a of the handle body 10, and is configured to be alternately operated with the traveling clutch 12.

First, a brake operation bracket 27 is projected forward from the horizontal portion 10a of the handle body 10, and a brake link 2 is provided between the brake operation bracket 27 and the brake lever 13a of the brake 13.
8 are connected. The upper and lower ends of the brake link 28 are pivotally connected to the brake operation bracket 27 and the brake lever 13a by pins 32, 32, respectively.

In the embodiment shown in FIG.
2 and the brake 13
The bracket 27 for operating the brake is provided in the same direction (forward) of the horizontal portion 10 a of the handle main body 10.

Therefore, when the horizontal portion 10a of the handle main body 10 is rotated in the forward direction of the body 2, that is, when the traveling clutch 12 is connected, the brake 13 is released. Configuration.

However, the brake operation bracket 27 is projected from the opposite (rear) side of the bracket 20 for operating the traveling clutch 12 so as to operate the brake operation bracket 27 and the traveling clutch 12. May be adopted so that the up-down rotation direction of the bracket 20 is opposite to that of the above-mentioned bracket 20 to obtain the same action.

In any case, in the embodiment shown in the drawings, the horizontal portion 10a of the handle main body 10 is rotated in the forward direction of the body 2, and the brake 13 is released when the traveling clutch 12 is connected. When the connection of the traveling clutch 12 is released, an alternate operation of applying the brake 13 is performed.

Further, an operating position holding device 31 is provided on the brake 13 similarly to the traveling clutch 12. When the brake 13 is applied, the operation position holding device 31 holds the state as it is.
When the brake 13 is released, the state is maintained.

In the embodiment shown in FIG.
2 (the brake 13), an upright bracket 33 is provided in a vertical position of the horizontal portion 10a of the handle main body 10 at a neutral position, and an upper end 35a of a brake tension spring 35 is engaged with the upright bracket 33, and The lower end 35b of the tension spring 35 is vertically engaged with the column 11.

With the above configuration, for example, when the tension bar 21 is tilted toward the V-belt 18 together with the tension roller 19, the tension spring 35 for the brake also works to operate the upright bracket 33 and the brake operation. The bracket 27 is also tilted in the same direction as the tension bar 21, the brake lever 13 a is pushed down via the brake link 28 to release the brake 13, and the state is maintained by the overdead center mechanism, and at the same time, the traveling clutch 12 are connected.

The horizontal portion 10a of the handle main body 10 is artificially rotated in the rearward direction of the body 2, and when the upright bracket 33 exceeds a neutral point (dead point), the brake tension spring 35 By operation, the upright bracket 33 is tilted rearward, the brake lever 13 is pulled up via the brake operating bracket 27 and the brake link 28, and the brake 13 is applied, and the state is over in the same manner as described above. It is held by the dead center mechanism, and at the same time, the connection of the traveling clutch 12 is released.

Further, in this embodiment, the horizontal portion 10b is provided at the upper end of the vertical portion 10b of the handle main body 10.
A connection handle 29 is provided which can be tilted only in a direction intersecting the rotation direction a (the front-back direction in the illustrated embodiment). That is, in the embodiment shown in the drawings, the connection handle 2
Numeral 9 is configured to tilt only in the left-right direction of the body 2. A control device 3 for a well-known side clutch (not shown) for controlling the operation of the left and right crawlers 36, 36 interlocking with the tilting of the connecting handle 29.
0 is provided.

The side clutch (not shown) is interposed between the engine 5 and the drive wheels 36a of the left and right crawlers 36, respectively, and is housed in the transmission 16, for example. And the engine 5
, The transmission of the traveling drive force from the left and right crawlers 36 to the drive wheels 36a is separately and intermittently performed.

That is, for example, when turning (steering) from the straight traveling state to the right side, the right side clutch is disengaged. As a result, the drive wheel 36a of the right crawler 36 is in a free or braking state, and only the drive wheel 36a of the left crawler 36 is driven,
The body 2 is turned to the right.

The connection and disconnection of each of the side clutches is performed by controlling two left and right steering clutch levers (not shown) built in the transmission 16. The configuration is performed by pulling an inner wire of a Bowden cable connected to one end.

In the present invention, the pulling operation of the wire is performed by the connecting handle 29 provided so as to be tiltable only in the left-right direction of the body 2 with respect to the upper end of the vertical portion 10b of the inverted T-shaped handle main body 10. Things. More preferably, the tilting direction of the connection handle 29 and the side clutch operation in the body advancing direction are made to coincide.

One embodiment of this is shown in FIGS. That is, a substantially U-shaped support portion 38 having an open body in the left-right direction and upward is fixed to the upper end of the vertical portion 10b of the inverted T-shaped handle main body 10, and integrated with the lower end of the connection handle 29 inside. , And side clutch operation levers 40a and 40b provided on the front and rear surfaces thereof so as to protrude symmetrically on both sides are movably supported by pins 41, respectively.

Further, when the connecting handle 29 is tilted left and right at the front and rear diagonal positions of the lower surface of the rectangular block 39 provided at the lower end of the connecting handle 29, the side clutch operating levers 40a, 40b Abut the respective lower surfaces of the side clutch operation levers 40a, 4
Locking projection 4 that pushes up one tip direction of Ob
2a and 42b are provided integrally.

Specifically, in FIG. 3, when the connecting handle 29 is tilted rightward, the left locking projection 42a of the square block 39 provided at the lower end of the connecting handle 29 Abuts against the lower surface of the left side clutch operating lever 40a to push up the distal end of the left side clutch operating lever 40a, and from the lower surface of the right side clutch operating lever 40b, engages the right locking projection. 42b is separated so as not to affect the right side clutch operation lever 40b.

Conversely, in the drawing, the connecting handle 29
Is tilted leftward, the right locking projection 42b of the square block 39 provided at the lower end of the connection handle 29 is connected to the right side clutch operating lever 4
0b, and pushes up the distal end of the right side clutch operating lever 40b, the left locking projection 42a is separated from the lower surface of the left side clutch operating lever 40a, and the left side clutch operating lever 4
0a is not affected.

In the drawing, 43a and 43b are stoppers for restricting the lowering of the left and right side clutch operation levers 40a and 40b, respectively.

Next, the side clutch operating lever 4
0a and 40b, inner wires 45a and 45b of Bowden cables 44a and 44b for pulling two steering clutch levers built in the side clutch.
Of the outer tubes 46a, 46
b is fixed to supporting rods 47a, 47b provided on the vertical portion 10b of the inverted T-shaped handle main body 10.

In the drawing, 48a and 48b are connecting metal fittings for the inner wires 45a and 45b, 49 and 50 are bolts and nuts for locking the same, and 51 is the outer tube 4
6a and 46b are fixing nuts.

Further, the side clutch operation in the direction in which the connecting handle 29 is tilted and the direction in which the machine body 2 travels are matched. That is, to change the direction from the straight traveling state to the right, the connecting handle 29 may be tilted to the right. To change the direction from the straight traveling state to the left, the connecting handle 29 may be tilted to the left. It is configured to be good.

Specifically, when the connecting handle 29 is tilted to the right, the tip of the left side clutch operating lever 40a is pushed up as described above,
The inner wire 45a of the right Bowden cable 44a is pulled, the steering clutch lever of the right side clutch is pulled, and the drive wheel 36a of the right crawler 36 becomes free, and the left crawler 36 is Only the drive wheels 36a are driven, and the
Is turned to the right.

When the connecting handle 29 is tilted to the left, the tip of the right side clutch operating lever 40b is pushed up as described above, and the inner wire 45 of the left Bowden cable 44b is raised.
b is pulled, the steering clutch lever of the left side clutch is pulled, and the drive wheel 36a of the left crawler 36 is free or braked, and only the drive wheel 36a of the right crawler 36 is driven. , The body 2 is configured to be turned rightward.

As described above, in the embodiment shown in the drawings, when the handle 29 is gripped and the handle body 10 is pushed forward from the neutral position, the traveling clutch 12 is connected and the brake 13 is released. Pulling backward, the traveling clutch 12 is disconnected and the brake 13 is applied.

When the connecting handle 29 is tilted rightward, the body 2 can be turned rightward, and when tilted leftward, the body 2 can be turned leftward.

[0050]

According to the present invention, a steering wheel and a brake operation and a steering operation by a side clutch operation can be performed with a single handle, so that operability and workability can be improved.

[Brief description of the drawings]

FIG. 1 is a partially omitted perspective view of a self-propelled work vehicle according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of FIG.

FIG. 3 is an enlarged perspective view of a handle main body and a connecting handle portion.

FIG. 4 is an exploded perspective view of a connecting handle portion.

[Explanation of symbols]

 2 Body 10 Handle body 10a Horizontal part (of handle body) 10b Vertical part (of handle body) 12 Running clutch 13 Brake 14 Alternate operating device 25 Operating position holding device (of running clutch unit) 29 Connecting handle 30 Side clutch control device 31 Operating position holding device (of brake part)

Claims (3)

[Claims] A horizontal portion (10a) of an inverted T-shaped handle body (10) is rotatably supported by a body (2), and a traveling clutch (12) interlocked with the rotation from the horizontal portion (10a). ) And brake (13) alternate operating device (14)
Is provided at the upper end of the vertical portion (10b) of the handle body (10), and a connection handle (29) is provided at the upper end of the handle portion (10), which can be tilted in a direction intersecting with the rotation direction of the horizontal portion (10a). 29. A self-propelled work vehicle, comprising: a side clutch control device (30) that is linked to the tilt of the portion from the portion (29). 2. An operation position holding device (2) is provided on each of the traveling clutch (12) and the brake (13).
The self-propelled work vehicle according to claim 1, wherein 5) and (31) are provided. 3. The self-propelled work according to claim 1, wherein a tilting direction of the connection handle (29) and a side clutch operation on a steering direction side of the body (2) are made to coincide with each other. car.