JPS6271711A - Stepped axis vehicle for inclined ground - Google Patents

Abstract

PURPOSE:To prevent the lateral slide during the traveling on an inclined ground by converting the rising and lowering of legs to the swing of a swing arm by a rack and a pinion and turning a wheel supporting member around a horizontal shaft through a connecting link by the swing. CONSTITUTION:When a car travels on an inclined ground 25, the legs 12 on the valley side are lowered from a frame 11, and the legs 12 on the mountain side are raised. The rising and lowering movement swings a swing arm 23 through a rack 18, pinion 19, worm 20, and a worm wheel 21. In other words, the swing arm 23 swings downwardly on the valley side and swings upwardly on the mountain side. These swings turn a wheel supporting part 14 around a horizontal shaft through a connecting link 24, downwardly on the valley side and upwardly on the mountain side, and the tread surface of a wheel is set parallel to the inclined surface, and the grounding is performed through all the tread surface. The therefore, the lateral slide is prevented, even in the traveling on an inclined ground.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a vehicle for use on slopes in which the height positions of the axle on the mountain side and the axle on the valley side are different so that the slope can be driven in a horizontal direction perpendicular to the direction of the slope. Regarding stage-axle vehicles.

Conventionally, the graded axle vehicle for use on slopes was the C7L/
-mu1 below (CF711 formula (7) IIa12A, 2
Take out B and attach wheels 3 to the lower ends of legs 2A and 2B,
By changing the lengths of the legs 2B on the mountain side and the legs 2A on the valley side according to the degree of inclination of the slope 4, the height positions of the wheels 3 on the mountain side and the valley side are changed, thereby keeping the frame 1 in a horizontal state. I try to keep it that way. The wheels 3 are directly driven and driven by hydraulic motors 5 provided at the lower ends of the legs 2A and 2B.

However, in such a conventional type, there is little clearance between the hydraulic motor 5 on the valley side and the ground on the slope 4.
There is a risk that the hydraulic motor 5 and the legs 2A may be damaged by obstacles such as stumps. Further, if the height positions of the wheels 3 on the mountain side and the valley side are different, the tread surface 6 of the axle 3 will not be in contact with the ground across the entire width direction, and there is a problem that vL'J' slipping toward the valley side is likely to occur.

Therefore, an object of the present invention is to ensure sufficient clearance between the wheels on the valley side and the ground on the slope, and to prevent skidding by making the ground contact area of the wheels sufficient.

In order to achieve this object, the present invention includes a leg configured to be able to rise and fall with respect to a frame, a wheel support member that is attached to the lower end of the leg and configured to be swingable around a horizontal axis in the longitudinal direction of the vehicle. A vertical rack attached to the frame, a swinging arm that is connected to a pinion on the leg side that meshes with the rack and swings up and down as the leg moves up and down, and the swinging arm and the wheel support member. and connecting links that connect and cover each other.

Therefore, when the leg on the valley side is lowered and the leg on the mountain side is raised in accordance with the slope, the swinging arm swings downward on the valley side, and the wheel support member is leveled via the connecting link. Since the wheels are rotated downward around the axis, and conversely rotated upwards on the mountain side, it is possible to ground the entire widthwise surface of the wheel tread on the slope on both the valley and mountain sides, increasing the contact area. can be made sufficient. Furthermore, on the valley side, the vicinity of the horizontal axis is moved upward relative to the middle wheel, so that a sufficient clearance with the ground on the slope can be secured.

An embodiment of the present invention will be described below. In FIGS. 2 and 3, reference numeral 11 denotes a frame of the vehicle, and liftable legs 12 are provided facing downward. A horizontal axis 13 in the longitudinal direction of the vehicle is provided at the lower end of the leg 12, and on this horizontal axis 13, a wheel support member 14, which is arranged to project laterally from the leg 12, is swingable up and down. installed on. 15 is a hydraulic motor built into the wheel support part 014;
It is directly connected to wheels 16 such as rubber tires. 17 is the ground.

A rack 18 is attached to the frame 11 and is arranged vertically along the leg 12, and a pinion 19 that meshes with the rack 18 is supported by the leg 12.

A worm 20 is coaxially rotatable with the pinion 19 and meshes with a worm wheel 21 supported by 1111112 to form a worm mechanism 22. 2
Reference numeral 3 designates a swinging arm that can rotate integrally with the worm wheel 21, and a connection link 24 is connected between its swinging VJ end and an appropriate position between the horizontal axis 13 and the wheel 16 in the wheel support portion 4414. are connected to each other.

In such a configuration, when traveling on a slope 25, the legs 12 on the valley side are lowered from the frame 11, and the legs 12 on the mountain side are raised toward the frame 11. Then, on the valley side, the leg 12' pinion 19 is lowered relative to the rack 18 and rotated, and the swing arm 23 is rotated downward via the arm 20 and the worm wheel 21. is swayed by.

As a result, the wheel support member 14 is connected via the connection link 24.
is displaced downward around the horizontal axis 13, and the entire widthwise surface of the tread surface 2e# of the wheel 1G is brought into contact with the slope 25, as shown by the imaginary line.

On the other hand, if J3 is on the mountain side, pinion 1 is connected to rack 18.
Is 9 relatively high? As a result, the swing arm 23 swings upward, and the wheel support portion 4414 is displaced upward. As a result, similar to the valley side, the tread 2 of the wheel 1G
6 is grounded across its entire width.

Specifically, for example, when a vehicle with a tread specification of 14001111 runs on a slope with a slope angle of 30 in one direction on the water 4F perpendicular to the slope direction, the length of the legs 12 on the mountain side and the valley side The difference in height is approximately 800+in. That is, both legs 12 are raised and lowered by 400 nIN each. However, since the amount of vertical displacement of the wheel 16t and the wheel support member 14 is approximately several tens of eleven at most, an appropriate reduction ratio can be obtained by adjusting the worm mechanism 23 and the lever ratio.

In addition, when driving on flat ground again, please return to l111 as before.
It is only necessary that the lengths of the legs 12 and 2 are made equal, and the wheels 16 also return to their original positions as the legs 12 are bent. Further, when traveling on a slope that is inclined in the opposite direction to that shown in FIG. 2, the legs 12 on both sides may be raised and lowered in the opposite direction to that described above. Furthermore, in the case of a four-wheel vehicle, four wooden legs 12 are provided on the front, rear, left and right sides, and the legs 12 on the valley side or the legs 12 on the mountain side may be raised and lowered together, or if necessary, The elevating and lowering of the four legs 12 may be controlled independently.

4. Drawing (7) rfU'l''J FJ2 Figure 1 shows a conventional example, Figure 2 shows an embodiment of the present invention;
Figure 3 is a diagram of the arrow shown in Figure 2.

DESCRIPTION OF SYMBOLS 11... Frame, 12... Leg, 13... Horizontal axis, 14... Wheel support member, 15... Hydraulic motor,
16... Wheel, 18... Rack, 19... Pinion, 22... Worm mechanism, 23... Swing arm,
24...Connection link, 25...Slope land agent
Yoshihiro MorimotoFigure 1Figure 2

Claims (1)

[Claims] 1. A leg configured to be movable up and down with respect to the frame, a wheel support member configured to be swingable around a horizontal axis in the longitudinal direction of the vehicle at the lower end of the leg, and a wheel support member attached to the frame. a vertical rack; a swing arm that is interlocked with a pinion on the leg side that meshes with the rack and swings up and down as the leg moves up and down; and a connection that connects the swing arm and the wheel support member to each other. A stepped shaft vehicle for sloped terrain, characterized by having a link.