JPS58101889A - Shock absorber - 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 mainly relates to a shock absorber for a front fork of a motorcycle.

In conventional shock absorbers of this type, the elasticity of the coil spring installed in the front fork is changed to 1. ! It is well known that a load adjustment device is provided in which the position of a spring bearing facing one end of the spring is changed using a cam member or the like, but in this case, manual adjustment is not possible. However, it is extremely difficult to constantly adjust the elasticity to the optimum state depending on the weight of the passenger or the load.

In other words, if the load is large when the rider is stationary, the amount of compression of the shock absorber will be large, and the compression slippage during running will be reduced, which not only tends to cause the so-called bottom beam phenomenon, but also worsens riding comfort. Moreover, it was found to lack maneuverability.

The present invention was developed to appropriately eliminate the above-mentioned defects, and eliminates the above-mentioned defects by automatically increasing and decreasing the air pressure within the shock absorber.

For this reason, the shock absorber of the present invention divides the coil spring in the inner tube into two parts, and has a magnetic spring guide slidably interposed therebetween, and a protective pipe that passes through the spring guide and is placed at the center of the inner tube. It is attached to the cap via an adjustment screw, and a reed switch facing the spring guide, a magnetically sensitive element such as a Hall element, etc., are incorporated inside the inner tube, and the magnetically sensitive element is used for a solenoid pulp for air charging and a solenoid pulp for air removal, respectively. The present invention is characterized in that it is connected to a solenoid pulp, and the present invention will be described in detail below based on the embodiments shown in the drawings.

FIG. 1 is a longitudinal cross-sectional view of essential parts showing an embodiment in which a front fork of a motorcycle is equipped with a shock absorber according to the present invention.

Reference numeral 1 denotes an inner tube, which is slidably fitted into the actor tube 2. A pair of coil springs 3 and 3' are installed between the inner tube and an annular spring between the coil springs 6 and 3'. A guide 4 is interposed.

A magnet 5 is embedded in this spring guide 4.

Reference numeral 6 designates a protective pipe, which is equipped with magnetically sensitive elements 7 and 7' consisting of a pair of reed switches facing the magnet 5 and spaced apart from each other, and further includes a protective vibro.
It passes through the center hole 4a of the spring guide 4 described above, and is elastically held on the cap 8 of the inner tube 1 via an elastic body 9 such as rubber, with a nut 10 serving as an adjustment screw. Manual adjustment scale 11 is engraved.

12 and 13 are solenoid pulp for air bleeding and solenoid pulp for air charging, which are wired as shown in the second diagram.
The actuation is effected by closing the adjustment switch 14.

Note that 15 is a power source, and 16 is a pipe that communicates the inner tube 1 with each solenoid pulp 12.15.

To explain the mode of operation of the shock absorber of the present invention constructed as described above, FIG. Even if the adjustment switch 14 is closed, the solenoid valves 12 and 13 are not energized and remain closed because the magnetically sensitive elements 7 and 7' are not activated.

Next, when the load is large and the amount of compression of the coil spring 3 increases in a stationary riding state, the magnet 5 moves upward in the figure.

Therefore, when the adjustment switch 14 is closed under this condition, the magnetic sensing element 7 is activated, the air charging solenoid pulp 13 is activated, compressed air is press-fitted into the inner tube 1 through the pipe 16, and the tubes 1, 2 When the internal pressure increases and the coil spring 3 is expanded, and the magnet 5 returns to the position shown in the first figure, the operation of the magnetic sensing element 7 is stopped.

Power supply to the air charging solenoid pulp 13 is stopped.

That is, the most appropriate tube internal pressure corresponding to the load can be automatically obtained.

Furthermore, when the load is small in a stationary riding state, the magnet 5 moves downward, and contrary to the above, the magnetic sensing element 7' works to open the air bleed solenoid pulp 12, and the compressed air in the tubes 1 and 2 is released. is extracted through the pipe 16, the internal pressure is reduced, and the magnet 5 is brought between the magnetic sensing elements 7, 7', the solenoid pulp 12 is closed and the internal pressure in the tube is automatically adjusted. It shall be determined.

As described above, according to the present invention, it is possible to automatically adjust to the best condition set in advance by an extremely simple operation of closing the adjustment switch 14 under a stationary riding condition, and as described at the beginning. It is possible to appropriately eliminate defects such as the bottom beam phenomenon and deterioration of ride comfort and handling stability, and the practical benefits are extremely significant.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of the essential parts of an embodiment in which a front fork is equipped with a shock absorber according to the present invention, with some schematic diagrams added, and is a wiring diagram of the 26th device. 1~Inner tube 2~Outer tube 6~Coil spring 4~Spring guide 5~Magnet
6 ~ Protective pipe 7.7' ~ Magnetic sensing element 8 ~ Cap 9 ~ Elastic body 10 ~ Suit 11 ~ Scale 12 ~ Solenoid knob for air bleed 13 ~ Solenoid knob for air charge (Loop 14 ~ Adjustment Switch 15 - Power supply December 11, 1981 Patent applicant Kayaba Kogyo Co., Ltd.

Claims (1)

[Claims] The coil spring in the inner tube is divided into two parts, and a magnetic spring guide is slidably interposed between them, and the spring guide is passed through and placed in the center of the inner tube, and a protective pipe is attached to the cap via an adjustment screw. At the same time, magnetically sensitive elements such as a reed switch and a Hall element, which face the spring guide, are incorporated inside the inner tube, and the magnetically sensitive elements are connected to an air charging solenoid pulp and an air bleeding solenoid pulp, respectively. Buffer as a percentage.