JPH0224986Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a dust seal for a front fork.

The lip of the dust seal that covers the opening of the outer cylinder of the front fork, which is formed by slidably fitting the inner and outer cylinders, is molded into an R shape. This is because there is a risk of it being scraped out.

However, the R shape of the lip of the dust seal is not perfect against water intrusion, and since a recess is formed at the top of the lip, water accumulates in the recess.
This water invades the interior of the front fork over time, causing a problem in that it impairs the operation of the front fork.

The present invention was developed to effectively eliminate the above-mentioned problems, and its purpose is to quickly drain the water that collects in the recess at the top of the dust lip to prevent it from entering the front fork. To provide a dust seal for a front fork that can ensure stable operation of the front fork.

In order to achieve this objective, the present invention is characterized in that a water drainage groove is formed in the lip portion of the dust seal.

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

Figure 1 is a side view of the front part of the motorcycle, Figure 2 is a cutaway side view of the dust seal part of the front fork, and Figure 3 is a side view of the front part of the motorcycle.
The figure is a plan view of the dust seal.

In the motorcycle shown in Fig. 1, 1 is the front wheel 2.
The front fork 1 is composed of an inner cylinder 3 and an outer cylinder 4 which are fitted in a vertically slidable manner, and the upper end of the inner cylinder 3 is rotatably supported at its lower end. It is connected to the vehicle body through top and bottom bridges 5 and 6. still,
In FIG. 1, 7 is a handle, and 8 is a fuel tank.

By the way, in the front fork 1, as shown in detail in FIG. 2, the inner cylinder 3 is inserted and fitted into the outer cylinder 4 from above. Oil sheet 9 that comes into sliding contact with
is fitted. Further, the upper end opening of the outer cylinder 4 is covered with a dust seal 10 formed of an elastic member, and the upper lip of the dust seal 10 that slides on the outer periphery of the inner cylinder 3 has a plurality of dust seals (as shown in FIG. 3). In the illustrated example, four drainage grooves 10a are formed.

Therefore, rainwater, etc. that accumulates in the recessed part of the upper part of the lip of the dust seal 10 is quickly discharged through the drainage grooves 10a formed therein, so that it is effective to prevent rainwater, etc. from entering through the dust seal 10. This prevents the operation of the front fork 1 from being impaired.

As is clear from the above description, according to the present invention, the water drainage groove is formed in the lip of the dust seal, so water that collects in the recess at the top of the dust seal is quickly discharged through the water drainage groove, and the water is drained from the front fork. The operational stability of the front fork is improved by preventing water from entering the front fork.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a side view of the front part of a two-wheeled vehicle, FIG. 2 is a cutaway side view of a dust seal portion of a front fork, and FIG. 3 is a plan view of the dust seal. In the drawings, 1 is a front fork, 3 is an inner cylinder, 4 is an outer cylinder, 10 is a dust seal, and 10a is a water drainage groove.

Claims (1)

[Scope of utility model registration request] A dust seal that is placed over the outer cylinder opening of a front fork formed by slidably fitting an inner and outer cylinder, characterized in that a drainage groove is formed in the upper part of the dust lip. Dust seal for front forks.