JPS61261105A - Off-road travel vehicle - Google Patents

Abstract

PURPOSE:To seal-tightly close a universal joint, by extending a seal means between a drive shaft and an axle bearing casing disposed in a wheel hub, and by coupling the universal joint with the wheel hub within the casing. CONSTITUTION:A seal means 13 which is formed of a bellows-like resilient member in a substantially conical shape is extended between a drive shaft 3 and an axle bearing casing 7 disposed in a wheel hub 5, to seal the casing 7. Further, the drive shaft 4 is coupled to the wheel hub 5 by means of a universal joint 4. With this arrangement, the universal joint 4 is disposed in a seal- tightly closed space to be prevented from being polluted by dirt water, etc. Thereby it is possible to normally rotate the wheel always.

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 all-terrain vehicle in which a universal joint connecting a drive shaft and a wheel hub is located within the axle bearing case.

b. Prior Art FIG. 3 shows the main parts of a conventional all-terrain vehicle.

In Figure 3, 1 is a low pressure tire, 2 is a wheel rim,
3 is a drive shaft, 4 is a universal joint, 5 is a wheel hub to which the drive shaft 3 is connected via the universal joint 4, 6 is a brake drum, 7 is an axle bearing case, 8 is a suspension unit, 9 is a brake In the panel, 10 is a brake cam, 11 is a brake shoe, and 12 is a lever connected to the brake cam 10.

In such an all-terrain vehicle, the universal joint 4 is located within the axle bearing case 7 installed inside the wheel hub 5 and exposed to the outside.

C1 Problems to be Solved by the Invention In conventional all-terrain vehicles, as described above, the universal joint 4 connecting the drive shaft 3 and the central axis 5a of the wheel hub 5 is exposed to the outside. As a result, muddy water and the like splashed by the tire l fall on the universal joint 4, thereby impeding the function of the universal joint.

The present invention was made in view of the above circumstances, and includes a universal joint that connects a drive shaft and a wheel hub.
To provide an all-terrain vehicle that can be operated normally at all times.

d0 Means for Solving Problems In order to achieve the above object, the present invention provides a universal joint that has an axle bearing case inside the wheel hub and connects the side gear shaft and the wheel hub within the axle bearing case. In the all-terrain vehicle, the space between the side gear shaft and the axle bearing case is sealed by a sealing means, thereby sealing the universal joint from the outside.

e. Examples Hereinafter, an all-terrain vehicle according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a main part of an embodiment of an all-terrain vehicle according to the present invention.

In FIG. 1, elements having substantially the same functions as those shown in FIG. 3 are given the same reference numerals.

This embodiment has almost the same configuration as that shown in FIG. Accommodation has been set up.

Furthermore, in this embodiment, the space between the drive shaft 3 and the axle bearing case 7 is sealed by a sealing means 13.

The sealing means 13 is formed of a bellows-like elastic member into a substantially conical tube shape, and after the drive shaft 3 is inserted through the central hole 13a of the sealing means, its outer peripheral edge is connected to the axle bearing case 7. The inner peripheral edge thereof is slidably and rotatably brought into close contact with the drive shaft 3 by a ring 13b.

By installing this sealing means 13, a sealed chamber 14 is formed between the drive shaft 3, the wheel hub 5, and the axle bearing case 7, and the universal joint 4 is located within the sealed chamber.

Therefore, the universal joint 7 is completely isolated from the outside, and the drive shaft 3 can swing up and down by the bellows of the sealing means 13.

Further, in this embodiment, the inner end of the axle bearing case 7 is extended to the inner end of the wheel rim 2 to form a flange 15 there, and the brake panel 16 is attached to the port 17 on the flange 15. It is installed.

The brake panel 16 is made of pressed steel plate, but it is also possible to integrally cast the axle bearing case 7 and the flange portion 15 using high-strength aluminum alloy casting, etc. In this case, the number of parts can be reduced and Cost reduction can be achieved.

Note that the axle bearing case 7 is bolted to a suspension arm (not shown) using a flange or the like.

On the other hand, the outer end of the brake drum 18 is collinearly connected to the hub 5 and the wheel rim 2 by bolts 19.

Further, the inner end of the brake drum 18 is connected to the wheel rim 2.
along the inner circumferential surface of the wheel rim 2 to the inner large-diameter end 2a of the wheel rim 2; A running 20 is attached to the inner peripheral surface of the installed portion by casting.

A ring-shaped drainage plate 21 having a diameter equal to or larger than the inner large-diameter end 2a of the wheel rim 2 is attached to the outer peripheral brake panel of the brake panel 16.

A small gap 22 is formed between the drain plate 21 and the wheel rim 2, and even if muddy water splashed up by the wheel enters the gap 22, the labyrinth effect and slinger effect in the gap 22 will be prevented. It is constructed so that muddy water is discharged to the outside.

FIG. 2 shows another example of the sealing means that can also be applied to the above embodiment.

This sealing means 23 is formed into a substantially conical cylinder shape by a bellows-like elastic member, and an oil seal 24 consisting of a main lip 24a and a dust lip 24b is formed on the inner peripheral edge thereof, and an oil seal 24 consisting of a main lip 24a and a dust lip 24b is formed on the inner peripheral edge thereof. An annular elastic plate 25 is embedded in the peripheral edge, so that the outer peripheral edge is tightly press-fitted into the axle bearing case 7.

Further, the drive shaft 3 is inserted through the central hole 26 of the sealing means 23 .

f. Effect As explained above, according to the all-terrain vehicle according to the present invention, the space between the drive shaft and the axle bearing case is sealed by the sealing means to form a sealed chamber, and the universal joint Since the universal joint is located in a sealed chamber, muddy water etc. scattered by the tires will not fall on the universal joint, so the universal joint can always function normally.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing a main part of an embodiment of a vehicle traveling on rough terrain according to the present invention, FIG. 2 is a vertical cross-sectional view showing another example of the sealing means, and FIG. FIG. 2 is a longitudinal cross-sectional view showing essential parts of the vehicle. 3... Drive shaft, 4... Universal joint, 5... Wheel hub, 7... Axle bearing case, 13, 23... Sealing means, 14... Sealed chamber. Figure 2

Claims (2)

[Claims] (1) An all-terrain vehicle having an axle bearing case inside the wheel hub, and a universal joint connecting the drive shaft and the wheel hub within the axle bearing case, wherein the drive shaft and the axle bearing An all-terrain vehicle characterized in that a space between the cases is sealed by a sealing means to form a sealed chamber, and the universal joint is located within the sealed chamber. (2) the sealing means is made of a bellows-shaped elastic member;
The all-terrain vehicle according to claim 1, wherein one end thereof is brought into close contact with the axle bearing case, and the other end is brought into close contact with the drive shaft in a slidable and rotatable manner.