JPS6033101A - Spoke - Google Patents

Abstract

PURPOSE:To assure the strength of the joint of a spoke of a motocycle's wheel and lighten the spoke, by forming the spoke body with a pipe and forming the joint by inserting a core-material in it. CONSTITUTION:A spoke body 1 is formed with a pipe, and a core-material 4, such as steel wire, is inserted in the joint 2. In this way, it is not necessary to fear that the pipe is crushed during the bend process of the spoke 1, and the spoke 1 can be lightened because the inside of it is made to be hollow. Consequently, the diameter of the spoke 1 can be increased without an increase in weight, so the spoke 1 can be improved in its strength.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates primarily to a spoke that is bent in a wheel for a two-wheeled motor vehicle so that the spoke body is inserted and locked into a wheel hub at the joint portion.

Conventionally, in this type of spoke, the diameter of the joint part must be greater than a certain value in order to prevent the spoke body from forming.For this reason, conventionally, the spoke body was formed to the necessary thickness for the joint part over its entire length. Alternatively, the connecting portion is made thicker by using a stepped shape, but the former has the disadvantage that the weight increases, and the latter has the disadvantage that the step processing is troublesome and expensive.

The object of the present invention is to eliminate such inconveniences and provide a lightweight and inexpensive spoke that ensures the strength of the joint.
A spoke formed by bending a joint part is characterized in that the spoke body is formed of a pipe and a core material is inserted into the joint part.

Next, the present invention will be explained with reference to the illustrated embodiments.

FIG. 1 shows a wheel for a two-wheeled motor vehicle, and this wheel is made up of a wheel rim OrC tire D attached to a wheel hub A through a plurality of spokes B, and each spoke B is connected to a wheel as shown in FIG. As shown in the figure, the joint part (2) is bent into a substantially V-shape at one end of the spoke body (tl), and each spoke hole aVc shaped like F ear hap A is pushed through, and the joint part (2) The rim 0 is prevented from coming off by the enlarged head (2a) at the tip of the rim 0, and is tightened and fixed to the rim 0 by a spoke nipple F screwed into the threaded portion (3) at the other end.

According to the present invention, the spoke body (1) is formed of a pipe, and the joint part (2) is provided with a core material (4) such as a steel wire.
), and in this case, it is advantageous to insert the core material (4) in advance when bending the joint portion (2) to prevent the pipe from collapsing due to the bending process.

In the illustrated example, the threaded portion (3) is formed into a stepped shape by lassing the other end of the spoke body (1), but there is no particular need to form it into a stepped shape, and in any case, the main body 113 may be By forming it with a pipe, the thread diameter can be increased without increasing the weight compared to the conventional solid rod type, and the strength of the threaded portion +31 against the tightening force of the spoke nipple E can be improved.

Next, to explain its operation, the joint part 121K of the spoke body fil with the wheel hub A is formed into a bent shape so that a bending moment acts on it. If left as is, it may collapse, but according to the present invention, since the core material (4) is inserted into the joint (2), this will not collapse.
Moreover, the moment of inertia of the joint section (2) increases, and sagging deformation is also prevented.

The core material is inserted into the bent joint of the pipe, and the rigidity of the joint is improved to the same degree as when the joint is made of a solid rod with the same diameter as the outside diameter of the pipe. Even without step processing as in the case of a solid rod type, the weight is reduced because the parts other than the connecting part are hollow, and it is possible to obtain a lightweight and inexpensive spoke with high rigidity.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a wheel for a two-wheeled motor vehicle, and FIG. 2 is a cross-sectional view of one example of the spokes of the present invention used therein. (1) Spoke body (2) Joint part (4) Core material A Wheel hub 0 Wheel rim outside 2 people

Claims (1)

[Claims] 1. A spoke formed by bending a joint part of one end of a spoke body to a wheel hub or rim, characterized in that the spoke body is formed of a vibrator and a core material is inserted into the joint part.