JPH0514251U - Work vehicle equipped with an axle swing angle control device - Google Patents

Abstract

(57) [Summary] [Purpose] To alleviate the impact due to the abutment of the axle that swings to prevent the wheel from rising and the stopper that controls the maximum swing angle of this axle. [Structure] A propeller shaft 16 extending in the vehicle front-rear direction below the frame 13, and the propeller shaft 16
Axle 14 which swings around the axis of the vehicle and is provided with tires 17 at both ends, and is mounted on both sides of the frame 13 in the vehicle width direction so as to face the axle 14. When the axle 14 swings to a predetermined angle, the axle 14 It is applied to a work vehicle provided with an axle maximum swing angle regulation device having a stopper 18 that regulates the maximum swing angle of the axle 14 at the end. Then, the axle 14 or the stopper 18
An elastic member 19 is attached to one of the contact surfaces to reduce the impact force at the time of collision between the axle and the stopper 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work vehicle that regulates the maximum swing angle of an axle that swings following an uneven road surface.

[0002]

[Prior Art]

 7 and 8 are conventional examples showing a schematic configuration of an axle swing angle regulating device for a work vehicle of this type. In both figures, 1 is a frame of a wheel loader, on the lower side of which an axle 3 having rear wheels 2 provided at both ends is arranged. This axle 3 is supported by a bracket 4 (not shown) from the frame 1. Is pivoted by. When the wheel loader travels on an uneven road surface and, for example, the rear wheel 2 on the right side rides on a convex portion in the figure, the axle 3 swings counterclockwise around the propeller shaft 5 axis and the other rear wheel. Prevents the lifting of 2. Numeral 6 is a stopper projecting downward on both sides of the frame in the vehicle width direction, and when the axle 3 swings to a predetermined angle, it abuts the axle 3 as shown in FIG. 8 and regulates the swing angle of the axle 3. .. The driving force of the propeller shaft 5 is transmitted to the rear wheel 2 by the axle 3.

[0003]

[Problems to be solved by the device]

 However, in a work vehicle equipped with such a conventional axle swing angle control device, since the axle 3 and the stopper 6 are both made of metal, if they hit, the impact will be large and the riding comfort will be poor. ..

The object of the present invention is to regulate the swinging angle of the axle so as to reduce the impact caused by the abutment of the axle that swings to prevent the wheel from rising and the stopper that regulates the maximum swinging angle of the axle. To provide a work vehicle equipped with the device.

[0005]

[Means for Solving the Problems]

 The present invention will be described with reference to FIG. 1 showing an embodiment. In the present invention, the propeller shaft 16 extending in the vehicle front-rear direction under the frame 13 and the driving force of the propeller shaft 16 are applied to both ends. Axle 14 provided so as to be transmitted to the tire 17 of the vehicle and swing about the axial center of the propeller shaft. The present invention is applied to a work vehicle provided with an axle swing angle regulation device having an axle 14 and a stopper 18 that regulates the swing angle of the axle 14 when the axle 14 strikes at an angle. The elastic member 19 is attached to the contact surface of either the axle 14 or the stopper 18 to achieve the above object.

[0006]

[Action]

 When the axle 14 swings to a predetermined angle, the axle 14 and the stopper 18 abut against each other via the elastic member 19, so that the impact due to this abutment can be alleviated.

Incidentally, in the section of means and action for solving the above problems for explaining the configuration of the present invention, the drawings of the embodiments are used for the sake of easy understanding of the present invention. It is not limited to the example.

[0008]

【Example】

 An embodiment in which the present invention is applied to the wheel loader shown in FIG. 4 will be described with reference to FIGS. In FIG. 4, 8 is a wheel loader having a main body 9 and a working machine 10. The working machine 10 is connected to the main body 9 so as to be swingable in the vehicle width direction by a hinge pin (not shown) perpendicular to the ground. The work machine 10 has an axle (axle) (not shown) that extends in the vehicle width direction and has front wheels 11 provided at both ends thereof, and a bucket 12 that is swingably mounted to scoop up crushed stones.

As shown in FIGS. 1 and 3, a frame 13 extending in the vehicle front-rear direction is disposed in the center of the main body 9 in the vehicle width direction. As shown, an axle 14 extending in the vehicle width direction is provided. The axle 14 is pivotally supported by a substantially V-shaped bracket 15 supported by the frame 13.

Reference numeral 16 denotes a propeller shaft that is driven and rotated by an engine. The rotational driving force of the propeller shaft 16 is shown in FIGS. 2 and 3 via a differential gear (not shown) and a rotary shaft housed in the axle 14. The rear wheel 17 is transmitted to the rear wheel 17. As shown in FIG. 1, stoppers 18 project downward on both sides of the frame 13 in the vehicle width direction, and elastic members 19 are joined by an adhesive agent on the axle 14 facing the stoppers 18. Has been done. In the present specification, the differential gear connected to the propeller shaft and the rotary shaft that is rotated by the differential gear and transmits the driving force to the tire are simply referred to as an axle.

Next, the operation will be described. When the wheel loader 8 travels on an uneven road surface and, for example, the rear wheel 17 on the right side rides on the convex portion as shown in FIG. 5, the axle 14 swings counterclockwise about the propeller shaft 16 axis, The rear wheel 17 on the left side is prevented from rising. When the axle 14 swings to a predetermined angle, it strikes the stopper 18 via the elastic member 19 as shown in FIG. 6, and the swinging angle is restricted. At this time, the axle 14 and the stopper 18 abut against each other via the elastic member 19, so the impact due to this abutment is alleviated.

Although the elastic member 19 is attached to the axle 14 in the above embodiment, the elastic member 19 may be attached to the tip of the stopper 15. Further, although the case where the elastic member 19 is joined by an adhesive has been described, it may be fixed by a fastening member such as a bolt. In these cases also, the same effect as the above can be obtained. Furthermore, the present invention is applicable to various work vehicles other than wheel loaders.

[0013]

[Effect of the device]

 According to the present invention, when the axle swings to a predetermined angle, the axle strikes against the stopper via the elastic member, and as a result, the impact due to the impact between the axle and the stopper can be alleviated.

[Brief description of drawings]

1 is a view of an embodiment of an axle swing angle restricting device for a work vehicle according to the present invention, taken along line I-I of FIG.

FIG. 2 is a view of an example of an axle swing angle restricting device for a work vehicle according to the present invention as seen along line II-II in FIG.

FIG. 3 is a view taken along line III-III in FIG.

FIG. 4 is a view showing a wheel loader which is an embodiment of a work vehicle equipped with an axle swing angle regulation device according to the present invention.

FIG. 5 is a diagram for explaining the operation of the embodiment, and is a diagram showing a state in which the right rear wheel rides on the convex portion.

FIG. 6 is a view for explaining the operation of the embodiment, and is a view showing a state in which the axle hits the stopper via the elastic member.

FIG. 7 is a view showing a portion of a conventional axle swing angle regulation device for a work vehicle.

FIG. 8 is a view showing a state in which an axle of a conventional axle swing angle regulation device for a work vehicle hits a stopper.

[Explanation of symbols]

 13 frame 14 axle 16 propeller shaft 17 rear wheel 18 stopper 19 elastic member

Claims (1)

[Scope of utility model registration request] 1. A propeller shaft extending in the vehicle front-rear direction below a frame, and a driving force of the propeller shaft is transmitted to tires at both ends and is provided so as to swing about an axis of the propeller shaft. Axle swing angle with a fixed axle and both sides of the frame facing the width direction of the vehicle, and stoppers that limit the maximum swing angle of the axle and the abutment when the axle swings to a predetermined angle A work vehicle including a restriction device, wherein an elastic member is attached to a contact surface of either the axle or the stopper, and the work vehicle includes an axle swing angle restriction device.