JPH0624443Y2 - Work vehicle operation lever fixing structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is provided with a lock tool for fixing a cross swingable operation lever to a neutral position, and switches the lock tool between a locked position and an unlocked position. The present invention relates to an operation lever fixing structure for a work vehicle in which a manual lock lever for operation is provided to be swingable.

[Conventional technology]

In the above-mentioned work vehicle, conventionally, the lock lever is not only located outside the operation range of the operation lever so as not to interfere with the operation of the lock operation lever in the unlocked position, but is also in the lock position. However, it was located entirely outside the operating range.

[Problems to be solved by the device]

In the case of the conventional structure, it is necessary to secure an operating space for enabling the operation of the operation lever and a lock space for enabling the operation of the lock lever separately, which requires a large space for installing the lever. It was.

An object of the present invention is to modify the operating lever and the lock lever so that they can be installed in a relatively narrow space.

[Means for Solving the Problems]

According to a characteristic configuration of the present invention, in the operating lever fixing structure for a work vehicle described above, the free end side enters the operating range of the operating lever at the lock position of the lock lever, and
It is attached in a state in which it is entirely located outside the operating range in the unlocked position, and its action and effect are as follows.

[Action]

Even if the lock lever is mounted in the locked position so that the free end side enters the operating range of the operating lever and the lock position side part of the operating range of the locking lever and a part of the operating range of the operating lever overlap, When the lever is locked, since the operation lever is in the neutral position and does not obstruct the operation of the lock lever, it is possible to reliably operate the lock tool in the locked posture and perform the predetermined operation lever lock.

[Effect of device]

Due to the installation of the lock lever, a part of the operating range of the operating lever overlaps a part of the operating range of the lock lever, so that the space required for installing both levers can be reduced compared to the conventional one. The layout design has become easier from the standpoint of space.

〔Example〕

 Next, examples will be shown.

As shown in FIG. 5, a front vehicle body having a front wheel (1) and a shovel device (2), a rear wheel (3), a driving part (4) and a driving seat.
A rear vehicle body having (5) and a steering cylinder (6) are connected so as to relatively swing about a vertical axis (P ₁ ).
Thus, the front vehicle body is swingably operated with respect to the rear vehicle body to steer the vehicle body, thereby configuring a wheel type shovel loader.

One operating lever for the tilt cylinder (7) and the lift cylinder (8) to enable the operation of the shovel device (2)
(9) is provided on the right side of the driver's seat (5) through an opening / closing side engine bonnet (10) that swings and opens and closes around an axis (P ₂ ) as shown in FIG. And the operating lever (9) is the second
As shown in FIG. 3 and FIG. 3, a lever support shaft (11) having a rectangular block type lever boss portion (9a) penetrating therethrough, and this lever support shaft (1
The interlocking member pivotally attached to the lever support member (12) so as to support 1) and swing around the second axis (Y) orthogonal to the first axis (X) of the lever support shaft (11). (13) and by attaching to the fixed side engine bonnet (14) through the lever support member (12), the front-back direction around the first axis (X) and the second axis (Y) It is configured so as to oscillate in a crosswise direction in the left and right directions around it.

Then, as shown in FIG. 4, a lift cylinder operating valve (not shown) is attached to a cable connecting portion (9b) formed by welding a bent metal plate to the lever boss portion (9a) via a spherical joint (15).
Connect the operation cable (16) of and connect the interlocking member (1
Cable connection part (13a) formed by welding sheet metal to 3)
By connecting an operation cable (18) of a tilt cylinder operation valve (not shown) to the operation lever (9) via a spherical joint (17), the operation lever (9) and both operation valves are interlocked with each other, and The tilt cylinder (7) is operated when the (9) is oscillated in the left-right direction, and the lift cylinder (8) is operated when the operation lever (9) is oscillated in the front-rear direction.

As shown in FIG. 2 and FIG. 3, a sheet metal lock tool (19) for fixing the operation lever (9) to a neutral position that brings both the tilt cylinder operation valve and the lift cylinder operation valve into a neutral state is provided. It is attached to the lever support member (12) so as to swing up and down around the shaft center (P ₃ ). Then, as shown in FIG. 4, the operation arm portion (20a) provided on the rotation support shaft (20) of the lock tool (19) by bending one end side upward.
The lock lever (23) that enables the switching operation of the lock tool (19) by interlocking the lever support shaft (22) via the swing link (21) to the right side of the driver's seat (5). The lever support member (1) is disposed through the lever support shaft (22) in the vehicle body up-down direction which is arranged and which penetrates the opening / closing side engine bonnet (10).
The lock lever (23) is attached to the lock lever (23), and the lock lever (23) can be manually switched to lock and lock the operating lever (9) at the neutral position. It is configured so that it can be done.

That is, while maintaining the operating lever (9) in the neutral position,
As the lock lever (23) is rocked around the axis of the lever support shaft (22), the free end side of the lock lever (23) moves toward the operating range (A) of the operation lever (9) as shown by the solid line in FIG. ) Entered into the lock position (ON), the lock tool (19) will move to the spindle stay (24).
It comes into contact with the first stopper (25) attached to the lever boss (9a) and is fitted to the pin (26) attached to the lever boss (9a) to be in a locked posture. Then, the spring holder (27) attached to the operation arm portion (20a) and the spring holder (2) attached to the spindle stay (24).
By the urging force of the spring (29) stretched over 8), the lock tool (19) is kept in the lock posture and the lock lever (23) is kept in the lock position (ON).

When the operating lever (9) is operated to the unlocked position (OFF) where the entire lock lever (23) is located outside the operating range (A) as shown by the phantom line in FIG. 1, the lock tool (19) is Pin (2
6) and is released from the shaft stay 6), and comes into a lock release position in which the second stay 30 is attached to the spindle stay 24. When the lock lever (23) swings, the spring holder (27) swings accordingly, causing the spring (29) to urge the rotation shaft (20) to rotate in the opposite direction to that when the lever is locked. The lock tool (19) is maintained in the unlocked posture and the lock lever (23) is maintained in the unlocked position (OFF) due to the biasing force of the spring (29).

The operation lever (31) shown in FIGS. 1 and 3 operates a service port operation valve (not shown) via the operation cable (32). Further, (33) shown in FIG. 3 is a rear wheel fender.

[Another embodiment]

The present invention can be applied to various work vehicles such as backhoes as well as shovel loaders.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

1 shows a plan view of a lever mounting portion, FIG. 2 shows a partially cutaway side view of the lever mounting portion, and FIG. FIG. 4 is a rear view of the lever mounting portion with a part thereof cut away, FIG. 4 is a perspective view of an operating lever and a lock tool, and FIG. 5 is a side view of the entire shovel loader. (9) …… Operating lever, (19) …… Locking tool, (23) …… Lock lever, (A) …… Operating range, (ON) …… Lock position, (OF
F) …… Unlocked position.

Claims (1)

[Scope of utility model registration request] 1. A lock tool (19) for fixing a cruciform swingable operation lever (9) at a neutral position, and the lock tool.
(19) A lock lever (23) for manual operation that switches the lock lever (23) between a locked position and an unlocked position for swinging is provided in a work vehicle operation lever fixing structure, in which the lock lever (23) is in a locked position. Operation of the work vehicle installed so that the free end side enters the operating range of the operating lever (9) when (ON) and is entirely outside the operating range (A) when in the unlocked position (OFF) Lever fixing structure.