JPS6029302A - Steering wheel for motor-cycle and the like - Google Patents

Abstract

PURPOSE:To allow each weight on the both sides of a steering wheel to be balanced even if a brake disc is set only onto one side of the steering wheel by bending the sectional form of a spoke on the longitudinal section including an axle towards the axle and installing the brake disc onto the concaved side of the bent part. CONSTITUTION:The front wheel 1 which serves as a steering wheel is made of light alloy through casting integrally with a hub 6 supported onto an axle, rim 7 onto which a tire is mounted, and a spoke 8 for connecting the hub and rim. In this case, the longitudinal section of the spoke 8 including the axle is formed so that the section ranging from the connection part with the hub 6 to the connection part with the rim 7 is largely bent towards the axle. At the outer peripheral position of the hub 6, a brake disc 4 is fixed by a bolt 9 onto the side where the bent part of the spoke 8 is formed into concaved form. The caliper 5 fixed onto a front fork 3 is set with its half part inserted into the concaved side of the bent part of the spoke 8, and the brake disc 4 is allowed to stride at the position close to the center C of the rim 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steering wheel attached to the front side of a motorcycle or a tricycle (hereinafter referred to as a motorcycle or the like).

Generally, the front wheels of motorcycles and the like function as steering wheels. A disc-type braking device is installed on this steering wheel.
In the case of J, it is common to install one on one side and J in order to reduce the weight of the vehicle and make it more economical. However, when a braking device is provided only on one side in this way, the weight balance between the left and right sides of the steering wheels is biased to one side, which causes a problem of lowering the maneuverability.

An object of the present invention is to provide an automatic automatic brake system that is capable of improving maneuverability by balancing the weight on both sides of the steering wheel even if a disc-type braking device is installed on one side of the steering wheel. The purpose is to provide steering wheels for motorcycles, etc.

A steering wheel for a motorcycle or the like according to the present invention that achieves the above object is formed by integrally casting a hub, a rim, and spokes constituting the wheel, and a cross-sectional shape of the spokes that is Lj in a longitudinal section including the axle. It is characterized in that it is bent in the direction of the axle, and a brake disc is fixed to the concave side of the bent part.

The present invention will be explained below with reference to embodiments shown in the drawings.

In the motorcycle shown in FIG. 1, ■ is a front wheel serving as a steering wheel, and 2 is a rear wheel. 011 wheel 1 is tiii fork 3
The brake disc 4 is fixed to the J on one side. In addition, the above-mentioned braking disk 4 is attached to the r'+ij fork 3.
A caliper 5 for pinching is fixed.

FIGS. 2 and 3 show details of the steering wheel (front wheel 1).

A hub 6 supported by the axle of the front wheel, a rim 7 on which the tire is mounted, and spokes 8 connecting the hub 6 and rim 7 are integrally cast and molded from a light alloy such as magnesium alloy or aluminum alloy. has been done. In a longitudinal cross section including the axle, the spokes 8 have a cross-sectional shape extending from a connecting portion with the hub 6 to a connecting portion with the rim 7, and are largely bent in the axle direction. A brake disc 4 is fixed to the outer circumference of the hub 6 by bolts 9 on the side where the bent portions of the spokes 8 are concave. front fork 3
The caliper 5, which is fixed to the rim 7, has about half of its main body inserted into the concave side of the bent portion of the spoke 8, and straddles the brake disc 4 at a position as close as possible to the center C of the rim 7.

According to the above-mentioned motorcycle equipped with the front wheel 1 as a steering wheel, the disc-type braking device is provided only on one side, but the caliper 5 and the brake disc 4 are located closer to the rim center C than in the conventional steering wheel. Because it is closer to the side, the left and right weight balance is evened out and maneuverability is improved.

In addition, since it is easy to arrange the caliper 5 at the shortest position as close as possible to the center of rotation (steering axis) of the front fork 3, the inertia around the steering wheel can be reduced. Maneuverability can be further improved.

Furthermore, since the braking device is in a protected state inserted inside the rim 7, damage caused by flying stones and dirt caused by mud can be reduced. In addition, since the spokes 8 have a curved shape, they are more likely to be affected by impact.
! It can also prepare students who are slow-moving and depressed.

4 to 6 show other embodiments, respectively. In these embodiments, the brake disc 4 and caliper 5 are moved closer to the rim center C side than in the first embodiment.

In the embodiment shown in FIG. 4, the connecting portions 8a of the spokes 8 to the hub 6 are vertically extended in the radial direction at the rim center C, then bent approximately at right angles to the axle direction, extended in the axle direction, and laterally The main body of the spoke 8 is bent in the axle direction from the extension part as described above. Due to this connecting portion 8a, the brake disc 4 and the caliper 5 are arranged approximately at the rim center C.

In each of the embodiments shown in FIGS. 5 and 6, the connecting portions 8a of the spokes 8 to the hub 6 are biased toward the side ends of the hub 6, and the biased configuration of the connecting portions 8a allows the spokes to be positioned at the rim center C. oh&
This allows the braking device to be placed closer to the rim center C4.

Therefore, the steering wheels of the actual hh examples shown in FIGS. 4 to 6 are as follows:
It is possible to achieve even greater improvement in maneuverability than in the case of the first embodiment.

As described above, in the motorcycle ring steering wheel according to the present invention, the hub, rim, and spokes constituting the wheel are integrally cast and molded, and the cross-sectional shape of the spokes in the longitudinal section including the axle is adjusted in the axle direction. Since the brake disc is bent and the brake disc is provided on the concave side of the bent part, even if a disc-type brake device is installed on only one side of the steering wheel, it can be placed close to the center of the rim, making it easier to maneuver. The wheels on both sides of the wheel even out the balance and improve maneuverability. Furthermore, since the degree of freedom in arranging the caliper of the braking device increases, it can be placed closer to the steering axis, and the inertia around the steering wheels due to the braking force is reduced, which also improves maneuverability.

In addition, since the braking device can be placed near the center of the rim, it is protected from flying stones.
It is possible to reduce stains caused by dirt and mud. Furthermore, since the spokes have a bent shape, it is easier to see 4Q against impact, and the cushioning properties can be increased to 4.J"j.

[Brief explanation of the drawing]

Fig. 1 is a side view of a motorcycle equipped with a steering wheel according to the present invention, Fig. 2 is a longitudinal sectional view showing the main parts of the steering wheel, Fig. 3 is also a side view, and Figs. 4 to G. 3A and 3B are half-sectional views showing steering wheels according to other embodiments, respectively. 1. Front wheel (steering wheel), 4. Braking disc, 6.
Hub, 7...rim, 8...spoke, C...rim center. Agent: Patent Attorney Makoto Ogawa − Patent Attorney: Ken Noguchi Patent Attorney: Kazuhiko Saishita

Claims (1)

[Claims] The hub, rim, and spokes constituting the wheel are integrally cast and molded, and the cross-sectional shape of the spokes in the longitudinal section including the axle is bent in the direction of the axle, and a brake disc is provided on the concave side of the bent part. Characteristics of steering wheels for motorcycles, etc.