JPH04328001A - Built-up wheel hub - Google Patents

Abstract

PURPOSE:To provide a strong and light-weight built up wheel hub by dividing the hub into right and left hub flanges and a central hub center, and by building up them, which are made from forged parts and a pipe material of light alloy. CONSTITUTION:Right and left hub flanges 1 are provided by forging from light alloy. A pipe shape hub center 6 is provided by extrusion or drawing from light alloy. A serration 7 is cut on either the external periphery of the inner end of the right and left hub flanges 1 or the internal peripheries of both ends of the hub center 6. Then, the right and left hub flanges 1 are press-fitted into the internal peripheries of both ends of the hub center 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembly type wheel hub for a spoke type wheel used in a motorcycle or the like.

0002

[Prior art] Wheel hubs used for motorcycles are
It is made of cast light alloy. In particular, those that need to be lightweight for use in races and the like are made by cutting from light alloy round bars.

0003

[Problems to be Solved by the Invention] Hubs cast from a light alloy cannot be made dense by casting, so in order to obtain a certain level of strength, the cover must be thickened, making it heavy. Also, those made by cutting from light alloy round bars, etc.
Although the material is dense, thin, and lightweight, it generates a large amount of cutting waste, resulting in a significant increase in cost.

[0004] In view of the above, the present invention provides a high-strength, lightweight assembly-type wheel in which the left and right hub flanges and the central hub center are assembled and joined together by forgings made of light alloy and pipe materials. Aim to get a hub.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the prefabricated wheel hub of the present invention has left and right hub flanges formed by forging a light alloy, and has a pipe shape formed by either extrusion or drawing of the light alloy. A hub center is provided, and serrations are carved on either the outer periphery of the inner end of the left and right hub flanges or the inner periphery of both ends of the hub center, and the left and right hub flanges are press-fitted to the inner periphery of both ends of the hub center. There is a particular thing.

[0006]

[Function] The left and right hub flanges are forged light alloy products, and the central hub center is made of light alloy pipe material. Both materials can be made of dense material, high strength, thin wall, and lightweight. Since the hub center and the left and right hub flanges are press-fitted with serrations on one side, the connection can be made stronger.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be explained with reference to FIGS. 1 and 2. The left and right hub flanges 1 are formed by forging from a light alloy. An axle 2 is passed through the center of the hub flange 1 and rotatably supported by a bearing 3. Near the outer periphery of the left and right hub flanges 1, spoke holes 5 for attaching spokes 4 are bored. The central hub center 6 is formed by extruding or drawing a light alloy pipe material and cutting it into a predetermined length. Then, serrations 7 are carved on either the outer periphery of the inner end of the left and right hub flanges 1 or the inner periphery of both ends of the hub center 6. The left and right hub flanges 1 and the hub center 6 are assembled and connected by press-fitting the portions with the serrations 7.

[0008] The left and right hub flanges 1 are made of forged material, and the central hub center 6 is made of pipe material, and both can be made of dense material and have strength even if they are thin, making them lightweight. The left and right hub flanges 1 and hub center 6 are
Since serrations 7 are provided on one side for press-fit connection, a strong connection can be achieved.

[0009]

[Effects of the Invention] As explained above, since the present invention is constructed as described above, the left and right hub flanges are made of forged material.
The central hub center is made of pipe material, and both materials can be made dense and thin, making them both strong and lightweight. The left and right hub flanges and the center hub center are press-fitted with serrations, so they can be firmly connected. In this way, it can be made cheaper than a machined hub.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of essential parts showing an embodiment of the present invention.

[Explanation of symbols]

1 Hub flange 6. Hub Center 7 Serrations

Claims (1)

[Claims] Claim 1: Left and right hub flanges are provided by forging from a light alloy, a pipe-shaped hub center is provided by either extrusion or drawing of the light alloy, and the outer periphery of the inner end of the left and right hub flanges or the inner periphery of both ends of the hub center is provided. An assembly type wheel hub characterized in that serrations are carved on either side of the hub center, and left and right hub flanges are press-fitted to the inner periphery of both ends of the hub center.