JPS5925737Y2 - Motorcycle steering shaft attachment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement of a steering shaft attachment device for a motorcycle.

The steering shaft attached to the front fork of the motorcycle is rotatably attached to the head pipe at the front end of the motorcycle via an upper plate and a bearing, allowing the direction of the front wheel to be controlled.

The hardness of the upper plate is adjusted by pressing it with a cone screwed onto the steering shaft.

If you push it too hard, the gap between the upper plate and the bearing will become tighter, making it harder to rotate.

Also, if you press it loosely, a gap will be created between the upper plate and the bare tongue, causing play, making it difficult to adjust.

Moreover, since the horn up bracket is stacked and tightened on top of the ball pusher, the tightening of the ball pusher is affected by force.

For this reason, it is necessary to take into account the influence of this tightening force in advance and adjust the pressing force of the cone, which requires skill to assemble and requires reassembly several times, which is time-consuming.

This invention has been improved in view of these points, and the embodiments of the invention shown in the drawings will be described below.

FIG. 1 shows an embodiment of the present invention, in which a steering shaft 6 integrated with an under bracket of a horn 4 is inserted above and below a head pipe 1 of a vehicle body via a bearing 2 and an upper plate 3.

Then, a ball pusher 7 is screwed onto the upper part of the steering shaft 6.

The ball pusher 7 is designed to stop at a stepped portion of the steering shaft, and a coil spring 8 is inserted between the ball pusher 7 and the upper plate 3 at the upper end, and the coil spring 8 is compressed by the ball pusher 7.

Lay the upper bracket 9 on top of the ball pusher 7, and attach the nut 1.
Tighten at 0.

FIG. 2 shows an embodiment of the present invention, which differs from the embodiment shown in FIG. The coil spring 8 is elastically inserted between the upper bracket 9 and the ball pusher 7.

The upper part of the ball pusher 7 fits into the upper bracket 9, and is tightened with a bolt 12 that tightens the slot 11 of the upper bracket.

The effect will be explained.

The upper plate 3 at the upper end is pressed by the elasticity of the coil spring 8.

Therefore, the coil spring 8 is always held down with a substantially constant elasticity, and the gap between the upper plate 3 and the bearing 2 is adjusted, so that it does not become hard or loose.

Further, even if the upper bracket 9 is tightened, the hardness of the upper plate 3 does not change because it is pressed by the coil spring 8.

Therefore, it can be easily assembled without requiring any skill.

As explained above, this idea involves rotatably inserting the steering shaft above and below the head pipe of the car body through an upper plate and a bearing, and pressing the upper plate with a cone. A step is formed at the top of the steering wheel, the cone or upper bracket attached to the steering shaft is locked to the step, and a coil spring is loaded between the upper plate and the cone or the cone and the upper bracket. The cone or upper bracket engages with the stepped part of the steering shaft and does not descend any further, and the upper plate is held down by a fairly constant elasticity of the coil spring, causing it to become stiff or loose. There is no pressure and it can be held down moderately.

Further, the influence of tightening the upper bracket on the upper plate is also eliminated.

Therefore, assembly is easy and does not require skill.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view showing another embodiment of the present invention. 1...Head pipe, 2...Bearing, 3...Top plate, 6...Steering shaft, 7...Ball pusher, 8 ...Coil spring, 9...Upper bracket.

Claims (1)

[Scope of utility model registration request] The steering shaft is rotatably inserted above and below the head pipe of the car body via an upper plate and a bearing, and the upper plate is pressed down with a cone.
A stepped portion is formed, a cone or upper bracket attached to the steering shaft is locked to the stepped portion, and a coil spring is loaded between the upper plate and the cone or cone and the upper bracket. Motorcycle steering shaft attachment device.