JPS628672Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spring load adjustment device for a hydraulic shock absorber that suspends the rear body of a motorcycle or the like.

Conventionally, many devices of this kind have been proposed that adjust the initial load of a coil spring by changing the relative position between the cam of a spring adjuster rotatably fitted around the cylinder's outer periphery and a stopper fixed to the cylinder's outer periphery. .

However, with this type of adjustment device, the rotation of the adjuster must be manually adjusted using a tool, so it is difficult to adjust it for a single damper shock absorber installed near the bottom of the seat in the center of the vehicle.
The problem is that most shock absorbers have to be removed and adjusted, so recently remote adjustment devices have been proposed that use hydraulic pressure to adjust the shock absorbers, but in order to prevent oil leakage, the sliding parts There are disadvantages in that high precision machining is required, which inevitably makes machining and assembly troublesome, and the price tends to be high. The purpose of the present invention is to eliminate such problems and to provide a device that can be adjusted with a relatively simple device.A piston 2 that slides inside a cylinder 1 is attached to a piston rod 3 that is fixed to one end. In the hydraulic shock absorber, the end extends outside the cylinder 1, and the piston rod 3 and the outer periphery of the cylinder 1 are provided with spring receivers 4 and 5, and a coil spring 6 is interposed between the spring receivers 4 and 5. A cylindrical cylindrical body 8 into which the spring receiver 5 is slidably inserted into the cylinder 1 and has a pair of locking pins 7, 7 protruding in the diametrical direction, and the locking pins 7, 7 of the cylindrical body 8. It has a cam surface 9 that engages with the cylinder 1, and is screwed into an adjusting screw 11 that is rotatably locked to a guide plate 10 fixed to the cylinder 1, so that rotation of the adjusting screw 11 causes the guide plate 10 to Slide plate 12 that slides
It is characterized by being supported through.

In the drawing, the guide plate 10 is formed as a rectangular plate body, and a tongue piece 10a is provided at the center of one side, and the adjustment screw 11 is rotatably locked through the tongue piece 10a. Guide pieces 10a and 10b are provided on the left and right sides perpendicular to the side on which the slide plate 10 is provided, and the slide plate 12 is attached to left and right sliding rods 12a, so as to slide along the guide pieces 10b and 10b.
12a and a connecting rod 12b connecting one end of the sliding rods 12a, 12a, and the sliding rod 1
A cam surface 9 is formed on 2a, and its continuous rod 12b
The adjustment screw 11 is screwed together with the adjustment screw 11, and the adjustment screw 11 is rotated by directly applying a tool to the head thereof, or from a remote location via a cable (not shown) connected to the head of the adjustment screw 11. . In the figure, reference numeral 13 indicates a stopper for supporting the guide plate 10, and reference numeral 14 indicates a lock nut provided on the adjustment screw 11.

Next, the operation will be explained. As the adjustment screw 11 rotates, the slide plate 12 slides back and forth on the guide plate 10, and as a result of this sliding, the locking pins 7, 7 engage with the cam surface 9. The holding cylinder 8 slides up and down on the outer periphery of the cylinder 1, and thus the position of the spring receiver 5 is moved to adjust the spring load. In this way, according to the present invention, the spring receiver 5 of the cylinder 1 is slidably inserted into the cylinder 1, and the cylindrical body 8 has a pair of locking pins 7, 7 projecting in the diametrical direction; The adjusting screw 11 has a cam surface 9 that engages with the locking pins 7, 7 of the cylinder body 8, and is screwed into an adjusting screw 11 that is rotatably locked on a guide plate 10 fixed to the cylinder 1. The spring receiver 5 is supported via the slide plate 12 which slides on the guide plate 10 when the adjustment screw 11 is rotated. It has the advantage that the spring load can be adjusted freely and its processing and assembly become easy.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway front view, and FIG. 2 is a view taken along the line A--A in FIG. 1. 1... Cylinder, 2... Piston, 3... Piston rod, 4... Spring receiver, 5... Spring receiver,
6... Coil spring, 7... Locking pin, 8... Cylindrical body, 9... Cam surface, 10... Guide plate, 11...
Adjustment screw, 12...slide plate.

Claims (1)

[Scope of utility model registration request] The other end of a piston rod 3 having a piston 2 fixed to one end that slides inside the cylinder 1 extends outside the cylinder 1, and spring receivers 4 and 5 are provided on the piston rod 3 and the outer periphery of the cylinder 1. In a hydraulic shock absorber in which a coil spring 6 is interposed between 5 and 5,
The spring receiver 5 of the cylinder 1 is fitted into a cylindrical body 8 that is slidably inserted into the cylinder 1 and has a pair of locking pins 7, 7 projecting in the diametrical direction; It has a cam surface 9 that engages with the pins 7, 7, and is screwed onto an adjusting screw 11 that is rotatably locked to a guide plate 10 fixed to the cylinder 1. A spring load adjusting device for a hydraulic shock absorber, characterized in that the guide plate 10 is supported via a sliding slide plate 12.