JPS58139876A - Stretching and contracting method for axle of self-propelled type working vehicle - Google Patents

Abstract

PURPOSE:To simultaneously stretch or contract front and rear wheels, by movably supporting the wheels on both ends of a stretchable axle. CONSTITUTION:The wheels 2, 2' are steered by stretching and contracting a steering cylinder 17, and the working vehicle can be steered by two-wheel steering or four-wheel steering. A tie rod stretching and contracting cylinder 15 is so constructed as to accomplish a toe-out of the wheels 2, 2' when being stretched in the condition where inner boxes 11, 11' are contracted, and to accomplish a toe-in of the wheels 2, 2' when being contracted under the condition where the inner boxes 11, 11' are stretched.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an axle extension/contraction method for a self-propelled work vehicle such as a self-propelled aerial work vehicle or a self-propelled clay 7 East.

In self-propelled work where overturning moment is applied during harvesting, the small shaft is made to be extendable and retractable in order to ensure the stability of the vehicle body supported by the wheels and to facilitate transportation. It is. However, the conventional axle extension method was to press the boom end of the work vehicle against the ground surface, lift the vehicle body, lift the wheels off the ground surface, and extend and retract the axle using a built-in cylinder, etc., so the conventional lJ method In addition to requiring a place to press against the ground, the axle cannot be extended or retracted during work, and the front and rear axles cannot be extended or retracted at the same time, so it has the disadvantage that it takes time to extend or retract. Ta.

The present invention has been made in view of the above circumstances, and
By toeing out the wheels pivotally supported at both ends of a telescoping axle and moving the work vehicle, the axle is extended, and by toeing the wheels in and moving the work vehicle, the axle is reduced. It is an object of the present invention to provide a method for extending and contracting the axle of a self-propelled work vehicle, which allows the front and rear axles to be simultaneously extended and contracted even during work without using an extension and contraction device.

Embodiments of the present invention will be described below with reference to the drawings. Figures 1 and 2 show a self-propelled aerial work vehicle, with a slewing ring (4 ) via the swivel base (5)
A telescoping boom (6) is pivotally supported on the rotating base (5), and the telescoping boom (6) is extended and contracted by a built-in telescoping knoll, and raised and lowered by a levitation/stool (7).

A workbench (8) is held in balance at the tip of the telescopic boom (6), and the workbench (8) is equipped with an operating device (9), and movement of work ij and operation of the boom are performed on the workbench (8). It is operated from.

The four wheels (2, 2', 3. 3') are each equipped with a claw mechanism at the front and rear, and as shown in Figure 3,
The lL axis has two left and right inner boxes (11, 11') telescopically fitted into an outer box (10) provided on the chassis, and a king pin (13, 13') by ten knuckle (12
, 12') are pivotally mounted, and a wheel (2, 2') is pivotally supported on each knuckle (12, ]2'). Each knuckle (12
, 12'), one end of each tie rod (14, 14') is pivotally connected to each tie rod (14, 14'), and the other end of each tie rod (14, 14') is connected to a tie rod telescopic cylinder (15). 15) tube is linked (1
6) to the steering cylinder (17).

Therefore, the wheels (2, 2') are steered by the expansion and contraction of the steering cylinder (17), the direction of movement of the work vehicle can be changed by two-wheel steering or four-wheel steering, and the tie rod can be expanded and contracted ( 15), when the inner box (11, 11') is expanded in the contracted state, the wheels (2, 2') are toeed out, and the inner box (II
, I+') contract from the extended state, the wheels (2, 2
”).

In addition, the Lli wheels on at least one of the front and rear axles are
It is connected to a drive motor (not shown) via a joint.

When extending the axle of the elevated work vehicle having the structure described in 1 above from the contracted state, the tie rod telescopic cylinders of the front and rear wheels are extended, and as shown in Fig. 4,
Move the front wheels and rear wheels to the same angle 1.-out, and move the work vehicle to the right in the figure.

As the work vehicle moves, the inner box of each axle is pulled outward and extends, and as the inner box expands, the toe-out angle of the wheel gradually decreases, and as shown in Figure 5, the axle extends by a certain length. Then! 1 (the wheels are also located in the normal direction of approximately 1 to).

By fixing the inch box to the outer box with a tie or the like in the state described in 1 above, the axle is fixed in an extended state.

When retracting the center shaft from the extended state, the tie rod telescopic cylinders of the front and rear wheels that are in the extended state are contracted, the front and rear wheels are toe-in at the same angle, and the fixation of the inner box and outer box is released. Move IJj. As the work vehicle moves, the inner box of each center axle is pushed inward and shrinks, and due to the shrinkage of the inner box, the toe-in angle of the wheels also becomes smaller, and when the axle is completely reduced, the wheels also become approximately 1V-shaped. Located in the normal direction. In this state, by fixing the inner box to the outer box with pins, etc., the axle is fixed in the reduced state.
+Industry+LC provides an axle expansion and contraction method for a self-propelled F'I industry vehicle that can simultaneously extend and retract the front and rear axles in a short time even during work.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of a self-propelled aerial work vehicle, FIG. 2 is a cross-sectional view of FIG. 4 and 5 are explanatory diagrams of the axle extension and contraction method. 1... Chassis, 2. 2', 3. 3'...wheels,
10. Outer box, 11. , ]1'... Inner box, 15... Tie rod telescopic cylinder. Patent applicant Aichi Sharyo Co., Ltd. J (Meeting 1 Figure 3 Figure 41/1 Figure 5 Figure 2 J

Claims (1)

[Claims] The wheels pivoted at both ends of the telescoping axle are rotated to move the work vehicle, thereby lengthening the axle.
A method for extending and contracting an axle of a self-propelled working vehicle, characterized in that the axle is reduced by toe-in the wheels and moving the working vehicle.