JPS58161601A - Wheel - Google Patents

Abstract

PURPOSE:To prevent mud or the like from infiltrating into a cavity and to prevent a weight increase and the deterioration of the steering performance by blocking the aperture of the cavity with the cavity interior being kept spacious in a wheel with its hub constituted with the double cylinder-like cavity made of a bearing portion and a stationary portion. CONSTITUTION:A hub 1 pivotally supported by an axle 3 and a rim for fitting a tire 4 are connected to each other through spokes 5 to constitute a wheel. The hub 1 is formed in a double cylinder-like shape made of a bearing portion 1a coupled with the axle 3 and a stationary portion 1b fixing a sprocket 6, and a cavity 1c is provided inside and the side portion of the cavity 1c is opened toward the outside. In this case, a plastic cover 7 is fitted to the aperature of the cavity 1c as a blocking member so as to keep the interior of the cavity 1c spacious and to block it to the outside. Thereby, mud or the like is prevented from infiltrating into the interior of the cavity 1c and a weight increase due to the clogging of mud inside the cavity 1c and the deterioration of the steering stability or suspension performance can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wheel mounted on a vehicle such as a motorcycle. More specifically, the present invention relates to a wheel having a double cylindrical hollow hub for off-road driving.

For wheels mounted on motorcycles designed to travel off-road, such as motocross vehicles or on/off-road vehicles, the rear wheel, which receives engine power, has a diameter larger than that of ordinary wheels. The outer diameter of the hub is generally large in order to install the sprocket, but the t
Until then, the hub would be heavy and heavy, so in order to reduce the weight, the hub has a double cylindrical hollow structure, with the bearing part for the axle and the fixing part of the sprocket. However, when riding on soft roads with such wheels installed, mud infiltrates and adheres to the hollow part of the hub, causing an increase in weight and impairing sweeping stability and suspension performance. It becomes.

The purpose of the present invention is to eliminate the drawbacks of the double orchid conventional wheels as described above, to prevent mud from entering the cavity while maintaining light weight, and to prevent damage to 11IN stability and suspension performance. The goal is to provide a wheel that does not cause problems.

The wheel of the present invention which quickly achieves the above object is a wheel in which the hub has a double cylindrical hollow structure with a bearing part and a subblock F or a fixing part of the brake disc, and the inside of the hollow part is made into a hollow space, and at least It is characterized by a plastic closing member fitted to close the opening of the cavity.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to embodiments shown in the drawings.

1 and 2 show a case where the present invention is applied to a rear heavy wheel of a motorcycle. In this figure, 1 is a hub supported by an axle 3, 2 is a rim on which a tire 4 is mounted, and the hub 1 and rim 2 are connected via spokes 5 to form a wheel. The hub 1 has a double cylindrical hollow structure including a bearing part 1a that fits on the axle 3 and a fixing part 1b that fixes the sprocket 6.
1c, and the side of this cavity 1c is opened to the outside. Therefore, although the hub 1 has a large outer diameter, the overall weight of the hub 1 is reduced, making it advantageous for off-road driving.

A plastic lid 7 is placed over the opening of the cavity IC of the hub 1, and serves as a closing member that makes the inside of the cavity IC into a space-filled shape and closes it off from the outside. This plastic member 17 is fitted so that its inner diameter part is fitted to the outside of the bearing part 1a, and its outer diameter part is fitted to a vortex cut into the inner circumferential wall of the fixing part 1b. The elasticity of the plastic itself allows it to be attached and detached.

According to the above-mentioned wheel, the interior of the cavity IC of the hub 1 is maintained in a spaced state, and the opening thereof is closed by the lid 7, so that the original lightness due to the cylindrical cavity structure is maintained. And what's more, it has wheels! Even if the vehicle gets stuck in a 2-way road, mud will not infiltrate into the cavity IC.

Therefore, mud packed into the cavity IC will not increase its weight or impede steering stability or suspension performance.

In the above-described embodiment, in order to make it easier to attach and detach the lid 7, the lid 7 may be divided into two from the axis to the left and right. Further, in the above embodiment, the plastic lid 7 has a root-shaped structure, but it is also possible to make the lid 7 made of foamed plastic and form a closed N member in a shape such that the entire cavity is embedded. . Also in this case, since it is made of foamed plastic, the hollow portion 1c is in a substantially empty state, and there is no problem in maintaining the lightness. It is desirable that the porosity (ratio of space occupied in the plastic) of such a foamed plastic is 50% or more.

Further, in the above-described embodiment, the sprocket 6 is fixed to the fixed portion 1b of the hub 1, but the present invention can be similarly applied even when a brake disc with a large outer diameter is fixed. It is.

As described above, the wheel of the present invention is a wheel in which the hub has a double cylindrical hollow structure with a bearing part and a fixed part of a sprocket or a brake disc, in which the inside of the hollow part is made into a spaced shape so that at least the hollow part Since the opening is fitted with a saw-shaped plastic closing member, the lightweight structure due to the double cylindrical structure is maintained, and even if it gets stuck in a soft road during off-road driving, Mud does not infiltrate into the hollow part of the hub, and there is no possibility of increasing serious conditions due to binding or impairing steering stability or suspension performance.

[Brief explanation of drawings]

FIG. 1 is a line sectional view showing the main parts of a wheel according to an embodiment of the present invention, and FIG. 2 is a 11th! It is a ■-■ arrow view of l. 1...Hub, 1a...Bearing part, 1b...Fixing part, IC...Cavity part, 2...Rim, 6...Sprocket, 7...M (closure member). Agent: Patent Attorney Shin Ogawa - Patent Attorney Ken Noguchi Patent Attorney Kazuhiko Saishita No. 11: A L, 1 Figure 2

Claims (1)

[Claims] A wheel in which the hub is a double-shaped cavity n1It with a bearing part and a sprocket or brake disc fixing part,
A wheel characterized in that the inside of the cavity is kept in a dark state, and a small number of closing members made of plastic are fitted to close the opening of the cavity.