JPS61222890A - Uneven-ground travelling car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a vehicle traveling on rough terrain.
The present invention relates to an off-road vehicle equipped with a ski steering device at the front.

b. Prior Art Conventionally, there have been off-road vehicles equipped with a ski steering device at the front so that they are suitable for driving on snowy fields or sandy areas.

The present invention further improves the conventional ski steering device for an all-terrain vehicle to enable smooth steering.

That is, in the present invention, in an all-terrain vehicle equipped with a ski steering device at the front, a positive caster angle is attached to the steering center axis of the ski, so that the edge of the ski on the turning direction side bites into the running surface when turning. I'm trying to make it happen.

C8 Example The following is an example of the rough terrain vehicle according to the present invention.
A detailed description will be given with reference to the accompanying drawings.

1 to 4 show an embodiment of the present invention.

The off-road vehicle according to this embodiment is equipped with a ski steering device 1 as shown in FIG. 1 at the front of the vehicle (not shown).

Note that FIGS. 1 to 4 show only the left ski steering device 1 because the ski steering device of the all-terrain vehicle is symmetrical.

This ski steering device 1 supports a ski 2 via an independent suspension device 3 such as a wishbone type on a vehicle body frame body (not shown) so as to be vertically movable, and six axes of the ski are tilted toward the rear of the vehicle. I'm trying to make it happen.

In this ski steering device 1, at the free ends of the upper and lower swing arms 4a, 4b of the independent suspension device 3,
Ball joint means 5a, 5b as in the conventional case
are arranged respectively.

The swing arm 4 of these ball joint means 5a
The installation position on a is located at the rear of the installation position on the swing arm 4b of the ball joint means 5b.

As a result, the line connecting the ball joint means 5a and 5b, that is, the steering center axis 6 of the ski 2U:) is tilted rearward.

The ski 2 has an arm 7a erected thereon.

7b is rotatably connected to the lower bracket 8a of the knuckle member 8 at the matching apex.

FIG. 3 shows the knuckle member 8 viewed from the back side.

At the upper part of the back side of the knuckle member 8, there is a bracket 9a.

A plate body 9 on which 9b is erected is fixedly installed by welding, screws, or the like.

The brackets 9a and 9b of the plate body 9 are attached to the swing arm 4.
Ball joint means 5a and 5b of ball joint means 5a and 4b are formed on the plate body 9 so as to be offset from each other in an oblique direction,
Holes 9c and 9d are drilled in each.

The ski 2 has a wavy cross-sectional shape as shown in FIG.

That is, the ski 2 has convex portions 10a and 10b protruding from the lower surface at its central portion and on the left and right sides, which improve the straight-line performance of the vehicle and ensure stable running. .

Further, curls 2a and 2b are formed at the front and rear ends of the ski 2, and in particular, the curl 2b at the rear end allows the vehicle to move smoothly backward.

Here, the knuckle member 8 to which the ski 2 is attached is
Fit the joint pin 5c of the ball joint means 5a into the hole 9c of the bracket 9a located on the back side of the bracket 9a from above the bracket 9a, and fit the joint pin 5d of the ball joint means 5b into the hole 9d of the bracket 9b from below the bracket 9b. By doing so, it can be attached to the swing arms 4a, 4b.

At this time, the knuckle member 8 is connected to the ball joint means 5.
a, 5b, it is rotatable with respect to the swing arms 4a, 4b, and this rotation axis is connected to the ski 2.
The steering center axis 6 forms a positive camber angle α with respect to the vehicle body frame.

Next, the operation of this embodiment will be explained with partial reference to FIG.

In the off-road vehicle of this embodiment, when a handle (not shown) is operated to turn to the left, for example, the edge 2c of the ski 2 on the left side is raised against the running surface 11, and Depending on the amount of turning, the ski 2 is tilted by an angle β.

Furthermore, in the case of a right turn by the present off-road vehicle, the edge 2d of the ski 2 in the turning direction (III) is similarly erected against the running surface, and the ski 2 is tilted by an angle -β.

FIGS. 6 and 7 show other embodiments of the all-terrain vehicle according to the present invention.

The rough terrain vehicle of this embodiment does not require any design changes to the upper and lower swing arms 12a and 12b of the conventional independent suspension system, but by slightly attaching the adapter 13 to the free end of the upper swing arm 12a. As in the case of the previous embodiment, the steering center axis of the ski can have a positive caster angle.

The adapter 13 is a substantially rectangular member, one end of which is fixed to the tip of the upper swing arm 12a, the other end of which extends rearward, and a ball joint means is inserted into a slot 16 formed at the rear end. 14a, and the ball joint means is tightened with a screw 17 to hold it firmly.

A ball joint hand 14b is directly attached to the free end of the lower swing arm 12b, and a plate 15 corresponding to the plate 9 of the embodiment described above is attached to the ball joint means 14a and 14b.

During this installation, the joint pin 14c of the ball joint means 14a is fitted from above to the bracket 15a standing upright on the back surface of the upper left end of the plate body 15, and the joint pin 14d of the ball joint means 14b is fitted onto the back surface of the lower right end of the plate body 15. It is fitted from below to a bracket 15b which is erected.

As a result, the steering center axis 18 of the ski (not shown) installed via the plate body 15 forms a positive caster angle α, as in the case of the previous embodiment, and has the same effect as in the case of the previous embodiment. play.

The present invention is particularly suitable for a saddle-type snow vehicle, but is not limited thereto, and can be applied to any vehicle as long as it is equipped with a ski steering device at the front.

As described in detail of the d8 invention, according to the all-terrain vehicle according to the present invention, since the steering center axis of the ski is made to have a positive caster angle, when turning, the steering wheel on the side of the turning direction is Because the edges of the skis bite into the running surface, steering operations are performed reliably and smoothly.

[Brief explanation of the drawing]

Figures 1 to 4 show the main parts of an embodiment of an all-terrain vehicle according to the present invention, with Figure 1 being a side view schematically showing it, and Figure 2 showing its upper and lower swing arms. FIG. 3 is a perspective view of the knuckle member seen from the back side, FIG. 4 is a sectional view taken along line A-A in FIG. 1, and FIG. This is a front view showing the state of the skis when turning, and is for explaining the effect of the example.
7 and 7 show the main parts of another embodiment of the all-terrain vehicle according to the present invention, FIG. 6 is a side view with a part omitted, and FIG. 7 is a side view with a part thereof omitted. It is a perspective view which is omitted and shown. 1... Ski steering device, 2... Ski board, 3... Steering center axis.

Claims (1)

[Claims] An all-terrain vehicle equipped with a ski steering device at the front, characterized in that a positive caster angle is attached to the steering center axis of the ski board.