JPS5843881A - Motorcycle with shock absorber with load adjusting mechanism - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motorcycle equipped with a shock absorber with a load adjustment mechanism.

Generally speaking, when the load on a motorcycle differs, that is, when there are one and two occupants, when the vehicle is loaded and when it is not loaded, when the weight of the loaded luggage is different, etc. , the load applied to the shock absorber is different, and the height of the front and rear of the vehicle changes, resulting in an imbalance. As a result, passenger comfort is affected by the load carried on the tower,
It is not always possible to obtain a good ride, and there are cases in which there is a risk that it may affect the handling.For this reason, the vehicle's front and rear heights may vary depending on the load placed on the vehicle. If the car becomes unbalanced due to changes in the vehicle, the initial spring pressure adjustment type and air spring pressure adjustment type adjust the vehicle height to balance the vehicle and change the strength of the shock absorbing function to improve ride comfort and driving performance. , shock absorbers with load adjustment mechanisms, such as those with adjustable mounting angles, have been developed. However, in motorcycles equipped with this type of shock absorber, although there is a rough guideline for adjusting the load adjustment mechanism, it is left up to the rider's intuition, and the load adjustment mechanism cannot be utilized properly. This is the actual situation.

The present invention was made by paying attention to such actual situation.
The main purpose is to properly utilize the load adjustment mechanism to properly adjust the front and rear vehicle heights, thereby improving the front and rear balance of the vehicle and providing a good ride. There is a particular thing.

Hereinafter, the present invention will be explained based on the drawings. FIG. 1 shows an example of a motorcycle according to the present invention. This motorcycle 10 has a load adjustment structure.

It is equipped with a spring initial pressure adjustable rear cushion 20 serving as a shock absorbing device.

This shock absorber 20 is of the same type as the shock absorber proposed in Utility Application No. 52-50209 filed by the present applicant, and includes a cylinder 21 filled with hydraulic oil and a cylinder 21 that slides inside the cylinder 21. A piston rod 22 that is attached to a piston that can be inserted into the piston and protrudes liquid-tightly and slidably from the tip of the cylinder 21, a retainer 28 provided on the outer periphery of the cylinder 21, and a retainer (not shown) provided on the outer periphery of the piston rod 21. The main component is a coil spring 24 interposed between the retainers, and the piston rod 21
A dust cover 25 that surrounds the upper outer periphery of the coil spring 24 is attached to the upper end.

The retainer 28 has a cylindrical shape, has a lower end surface formed into a cam surface, and is fitted onto the outer periphery of the cylinder 21 so as to be rotatable in the circumferential direction. In addition, a cam follower T roller locking pin 26 is provided protruding from the outer periphery of the cylinder 21.
The lower end cam surface of the retainer 28 is engaged with the locking pin 26 by the elastic force of the coil spring 24, and in this state, the locking pin 26 supports the retainer 28, and the retainer 28 is
It supports a coil spring 24. As a result, when the retainer 28 is rotated in one direction, the retainer 28 moves upward due to the cooperative action of the lower end cam surface and the locking pin 26, increasing the initial pressure of the coil spring 24, and the retainer 28 is rotated in the other direction. When the retainer 28 is rotated, the retainer 28 moves downward due to the cooperation between the lower end cam surface and the locking pin 26, thereby reducing the initial pressure of the coil spring 24.

The rear cushion 2o can be assembled into the vehicle body by rotatably attaching the lower end of the cylinder 21 to the rear end of the rear arm 11 and rotatably attaching the upper end of the piston rod 22 to the upper end of the seat pillar 12. It is attached.

On one side of the dust cover 25 that constitutes the rear cushion 2o, a display scale 81 is provided in the vertical direction thereof, and on the top of the chain case 18, there is a display scale 81 that extends upward along the rear cushion 20. An arm 82 is provided. The upper end of this indicator arm 82 is formed into a pointer 82a that bends backward, and the pointer 82a faces a reference value on a display scale 81 provided on the dust cover 25.

In addition, the inner tube 1 that makes up the front fork
A display scale 88 similar to the display scale 81 is also provided on the outer periphery of the tube 15, and an indicator arm 34 similar to the indicator arm 82 is also provided on the outer periphery of the data tube 15.

In the motorcycle i configured in this way, the vehicle sinks when a passenger rides on it or when cargo is loaded, but the amount of sinking on the rear wheel side and the amount of sinking on the front wheel side are determined by both indicating arms 82.
34, and thereby the difference in the amount of depression between the front and rear of the vehicle can be known. For this reason, for example, if the amount of depression on the rear wheel side is large, the initial pressure of the coil spring 24 can be adjusted appropriately by rotating the retainer 28 in one direction by a predetermined amount based on the difference in the amount of depression. As a result, the front and rear vehicle heights of the vehicle are properly balanced. This allows the occupant to drive the vehicle with a comfortable ride and without impairing steering stability due to unbalanced vehicle height. If the amount of depression on the rear wheel side becomes smaller after changing the number of passengers and the weight of the loaded luggage, the retainer 28 is moved to the other wheel a predetermined number of times based on the difference in the amount of depression on the front and rear wheels. When the coil spring 24 is operated dynamically, the initial pressure of the coil spring 24 is appropriately reduced, and the front and rear vehicle heights of the vehicle are appropriately balanced.

Furthermore, if a shock absorber with a load adjustment function is also adopted for the front fork' in this embodiment, by operating the load adjustment mechanism/mechanism of the front fork and rear cushion, not only the balance of the front and rear vehicle heights can be adjusted, but also the load adjustment function of the front fork and the rear cushion can be adjusted. Adjustment of the overall height is also possible.

In addition, in the present invention, instead of each display scale 81.38 and each indicator arm 32.84 adopted in the above embodiment, a spirit level 8 is provided on the upper surface of the fuel tank 16 as shown in FIG.
5 may be provided. In this spirit level '85, when the indicator ball 85a is at the center of the display scale 85b, the front and rear vehicle heights of the vehicle are in a balanced state, and when the height of the load mounted on the tower becomes unbalanced, the indicator ball 85a has the advantage that it moves back and forth so that the difference in the amount of depression between the front and rear wheels can be immediately read.

Note that in the above embodiments and modifications, 1. Although an example of a motorcycle equipped with a spring initial pressure rear cushion 20 has been shown, the present invention can also be applied to various motorcycles equipped with a shock absorber with a load adjustment mechanism such as an air spring pressure adjustment type or a mounting angle adjustment type. Of course.

Further, in the present invention, the amount of depression of the cushion 20, front fork, etc. shown in the above embodiment is electrically detected, and the difference in the amount of depression is displayed in analog or digital form on the meter panel. You may also do so.

As explained above, the present invention provides an automatic shock absorber with a load adjustment mechanism, which can adjust the front and rear heights of the vehicle by operating the load adjustment mechanism according to the load on the vehicle. The main feature of the structure of a two-wheeled vehicle is that it is provided with an indicator that indicates the difference in the amount of depression between the front and rear of the vehicle in response to the load. Therefore, according to the present invention, the difference in the amount of depression between the front and rear of the vehicle can be accurately determined using the indicator, and the vehicle height tt between the front and rear of the vehicle can be determined by operating the load adjustment mechanism.
ms can be achieved appropriately, and the balance between the front and rear vehicle heights can therefore be maintained appropriately.

[Brief explanation of drawings]

FIG. 1 is a side view showing an example of a motorcycle embodying the invention, and FIG. 2 is a plan view of a fuel tank showing a modification of the invention. Description of symbols IO...Motorcycle, 18...Inner tube, 14...Outer tube, 16...2 Fuel tank 1.20...Rear cushion, 21...Cylinder , 22... Piston rod, 28... Retainer, 24... Coil spring, 25... Dust cover, 26... Locking pin, 81.38...
・Display scale, 32.34... Indication arm, 85...
-・Level. Applicant Yamaha Motor Co., Ltd.

Claims (1)

[Claims] In a motorcycle that is equipped with a shock absorber with a load adjustment mechanism and can adjust the front and rear vehicle heights 3 of the vehicle by operating the load adjustment mechanism according to the load mounted on the vehicle, the front and rear heights of the vehicle can be adjusted in response to the load. 1. A motorcycle equipped with a shock absorber with a load adjustment mechanism, characterized in that an indicator is provided to indicate a difference in the amount of sinking.