JPS5828952Y2 - Telescopic fork for the front wheel of motorcycles, etc. - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a telescopic fork for the front wheel of a motorcycle, etc. More specifically, two fork rods each supported by a fork pipe support a fork shaft in the center, and the upper and lower The present invention relates to an improvement in a telescoping fork having a structure in which the fork is connected by a transverse bar spaced apart from the fork.

For telescopic forks of the above type,
The displacement length of the wheel is limited to the distance between the fixed end of the fork rod of the lower transverse bar and the fork pipe that supports the wheel when the fork is fully extended.

In conventional telescopic forks, both the upper and lower transverse bars are horizontal when viewed from the front.

With such a construction, the displacement length of the wheels can only be increased by the arrangement of the lower transverse bar.

However, this results in a disadvantageous reduction in the distance between the raised lower transverse bar and the fixed upper transverse bar that carries the structure, and thus in the length of the fork shaft supported between the central parts of these bars. It is.

The purpose of this invention is to eliminate the drawbacks of the prior art and to reduce the length of the fork shaft interposed between the center portions of the upper and lower transverse bars in the telescopic fork having the above structure. The purpose is to increase the displacement of the wheels without any damage.

That is, in this invention, the lower transverse bar is provided with two diagonal shanks, and these shanks extend upward from the boss-shaped central portion of the lower bar that connects to the fork shaft and toward the fork rod. It has been extended.

As a result of this configuration, the connection point of one end of the bar with the fork rod is pushed up, and the displacement length of the front wheel is also brought up accordingly.

Moreover, the distance between the centers of both bars and, by extension, the length of the fork shaft remain unchanged.

This invention will be explained in more detail below with reference to embodiments shown in the accompanying drawings.

Fig. 1 shows a telescopic fork for the front wheel of a motorcycle, etc., which includes a lower fork pipe 1 and a variable length fork rod 2 extending upward from the fork pipe 1.
It consists of

Here, the fork rod 2 may also be shaped like a pipe.

A bearing 3 for a wheel (not shown) is provided at the lower end of the fork pipe 1.

The upper ends of the two fork rods 2 are connected to each other by bars T1 and T2 which are vertically spaced apart.

These bars TI and T2 constitute the head of the fork and support the fork shaft 4.

The fork shaft 4 extends with both ends fixed to boss-shaped central portions 5, 5 of the bars TI, T2.

The telescopic fork is rotatably connected to a wheel frame (not shown) by this fork shaft 4.

The upper bar T1 has a horizontal shape when viewed from the front, and is fixed to the upper end of the fork rod 2.

On the other hand, the lower bar T2 is formed into a shallow square shape when viewed from the front, and has two shanks 6 diagonally intersecting from both sides of the central portion 5 toward the upper surface.

Each shank 6 is provided with a clamp bushing 7 having a slot at its end and is fixed to the fork rod 2 via this bushing 7.

Since the bar T2 on the lower side of the fork head is configured in the ■-shape, the displacement length of the wheel is the maximum distance A (i.e., the clamp butt 7 and the upper end of the fork pipe 1).

At the same time, the distance between the central portions 5 of the two bars TI and T2 and the length of the fork shaft 4 determined thereby remain unchanged or remain sufficiently large.

The shank 6 of the lower bar T2 preferably has a smooth upper edge, and preferably has reinforcing ribs 8 at its lower edge, as shown in FIGS.

The boss-shaped central portion 5 of the lower bar T2 has protrusions 9 on both sides each having a screw hole 11 opening downward.

A similar screw hole is also formed in the seat body 10 on the lower edge of the shank 6.

These screw holes 11 are for fixing the fender to the lower bar T2 of the fork.

The shank 6 extending obliquely from the lower bar T2 of the letter shape does not necessarily have to be straight, but may be upwardly convex or concave, or may be a partial combination of both. It may be.

In short, it is only necessary that these shanks 6 extend obliquely upward from the boss-shaped central portion of the lower bar T2.

Furthermore, these shanks 6 may extend obliquely rearward or forward as shown in FIGS. 3 and 4.

The shank 6 is integral with the central part 5 and the clamping bush 7, ie the lower bar T2 is one piece.

[Brief explanation of drawings]

FIG. 1: A front view showing an example of the telescopic fork of this invention. FIG. 2: An enlarged front view of the lower bar used in the above fork. FIG. 3; A plan view showing an example of the lower bar. Figure 4; also a bottom view. FIG. 5; A sectional view taken along the line ■-■ in FIG. 3. 1...Fork pipe, 2...Fork rod, 3...Bearing, 4...
Fork shaft, 5...Boss-shaped center part, 6.
...Shank, 7...Clamp bush, T1...Upper bar, T2...Lower bar.

Claims (1)

[Scope of Claim for Utility Model Registration] Two fork rods 2 supported by a fork pipe 1 A' are supported by a fork shaft 4 in the center and are supported by transverse bars TI and T2 vertically spaced apart. The lower transverse bar T2 has two diagonal shanks 6 which extend from the boss-like central part 5 of the lower transverse bar engaging the fork shaft upwardly and towards the fork. A telescopic fork for a front wheel of a motorcycle, etc., which extends toward the rod.