JP2507350Y2 - Spring load adjusting device for hydraulic shock absorber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a spring load adjusting device.

(Prior Art) A hydraulic shock absorber may be provided with a spring load adjusting device for adjusting a spring load.

FIG. 4 shows such a conventional spring load adjusting device, in which 100 is a cylinder, 101 is a piston rod,
A cap 103 is fixed to the lower end of the piston rod 101, a cylindrical member 104 is fitted to the upper outer periphery of the cap 103, and stoppers 105 ... Are fixed to the outer periphery of the cylindrical member 104. Also tubular member
A spring bridge 106 is rotatably fitted around the outer circumference of the 104, and
A plurality of locking portions 107 having different heights are formed at the lower end of 106.

As described above, the load of the spring 108 is adjusted by selectively engaging the locking portion 107 with the stopper 105.

(Problems to be solved by the invention) However, in such a spring load adjusting device, the spring 10
To prevent the tubular member 104 from moving downward with the elasticity of 8, the tubular member 10
4 A step portion 104a is formed in the lower part, and this step portion 104a is fitted to the upper end of the cap 103. Therefore, the tubular member 104 is a cap
It cannot be removed from 103, and for example, when replacing the spring 103, the cap 103 must also be removed, and maintainability was poor.

(Means for Solving the Problems) In order to solve the above problems, the present invention arranges a piston in a cylinder 1 slidably and fixedly mounts a piston rod 3 on the piston rod 3 side or the cylinder 1 side. The tubular member 8 is fitted to the fixing member 5 fixed to the side, the stopper 9 is fixedly provided on the outer periphery of the tubular member 8, and the spring bearing 12 provided on the outer periphery of the tubular member 8 selectively engages with the stopper 9. In a spring load adjusting device for a hydraulic shock absorber provided with a plurality of engaging portions 12b to be fitted, a notch 5c extending in the cylinder axial direction is formed in the fixing member 5, and the notch 5c is formed inwardly on the inner periphery of the tubular member 8. The extending claw 8a is formed, the claw member 8a is engaged with the notch 5c, and the length of the notch 5c in the cylinder radial direction is larger than the length of the claw 8a.

(Operation) Since the fixing member is formed with a notch extending in the cylinder axis direction, and the claw portion of the tubular member is engaged with the notch, the claw portion is provided with respect to the fixing member through the notch. It becomes movable and the tubular member can be removed from the fixed member.
Therefore, the spring receiver can be removed and the spring can be easily replaced.

(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of the hydraulic shock absorber, FIG. 2 is a vertical cross-sectional view of the lower part of the hydraulic shock absorber, and FIG. 3 is an exploded view of essential parts.

In the figure, reference numeral 1 denotes a cylinder, an upper metal 2 is provided on the upper portion of the cylinder 1, and the upper metal 2 is attached to the vehicle body side. A piston (not shown) is slidably fitted in the cylinder, and a piston rod 3 extending downward is fixedly mounted on the piston. A cap 5 and a lower metal 6 are fixed to the lower end of the piston rod 3, and the lower metal 6 is attached to the rear fork.

The cap 5 has a bowl shape, a communication hole 5a is formed on the bottom surface, and an annular groove 5b is formed on the outer periphery of the side surface. Further, a notch 5c extending vertically is formed on the side surface of the cap 5, and the notch 5c is formed over the entire vertical length of the side surface.

A tubular member 8 is attached to the outer periphery of the cap 5, and the tubular member 8 is prevented from sliding downward by a stopper ring 10 attached to the groove 5b of the cap 5. An oblong stopper 9 is fixedly provided on the outer periphery of the tubular member 8, and a part of the lower end of the tubular member 8 is bent inward to form a claw 8a. The claw 8a engages with the notch 5c, and this engagement prevents the tubular member 8 from rotating with respect to the cap 5. The radial length l2 of the notch 5c is set larger than the length 1 of the claw 8a.

A cylindrical spring receiver 12 is rotatably and vertically slidably mounted on the outer periphery of the tubular member 8, and a spring 13 is compressed between the receiving portion 12a of the spring receiver 12 and the spring receiver 1a above the cylinder 1. To do.

The lower end of the spring receiver 12 has engaging portions 12b whose heights are sequentially changed.
, And any one of the engaging portions 12b is engaged with the upper portion of the stopper 9. By this engagement, the spring bearing 12
The vertical position of is determined.

The cap 5, the tubular member 8, the stopper 9, and the spring receiver described above.
A spring load adjusting device 14 is constituted by 12, the engaging portions 12b, ....

In order to adjust the spring load, the spring 13 is slightly contracted so that the elastic force of the spring 13 does not act on the spring receiver 12, and the spring receiver 12 is rotated with respect to the tubular member 8 in this state. Thereby, the engaging portion 12b that engages with the stopper 9 is changed, the height of the spring receiver 12 is changed, and the spring load is adjusted as described above.

By the way, in hydraulic shock absorbers, springs should be
In some cases, 13 may be replaced, but in such a case, in this embodiment, it is carried out as follows.

First, the spring 13 is slightly contracted so that the elastic force of the spring 13 does not act on the spring receiver 12, and in this state, the stopper ring
Expand 10 and remove the stopper ring 10 from the groove 5b.
Next, the tubular member 8 is slid downward with respect to the cap 5 while sliding the claw 8a downward along the notch 5c, the tubular member 8 is removed from the cap 5, and the spring bearing 12 is removed together therewith.
And finally remove spring 13.

Thus, according to this embodiment, the tubular member 8 and the spring receiver 12 can be removed without removing the cap 5, and the spring 13 can be easily replaced.

As described above, according to the present invention, the fixing member is formed with the notch extending in the cylinder axis direction, and the notch of the tubular member is engaged with the notch. The claw portion can be moved with respect to the fixing member through the notch, and the tubular member can be detached from the fixing member. Therefore, the spring receiver can be removed and the spring can be easily replaced.

[Brief description of drawings]

FIG. 1 is a front view of the hydraulic shock absorber, FIG. 2 is a vertical cross-sectional view of the lower part of the hydraulic shock absorber, FIG. 3 is an exploded view of essential parts, and FIG. 4 is a conventional example. 1 ... Cylinder, 3 ... Piston rod, 5 ... Fixing member, 5c ... Notch, 8 ... Cylindrical member, 8a ... Claw, 9 ... Stopper, 12 ... Spring receiver, 12b ... Locking Department.

Claims (1)

(57) [Scope of utility model registration request] 1. A piston is slidably arranged in a cylinder, a piston rod is fixed to the piston, and a cylinder member is fitted to a fixing member fixed to the piston rod side or the cylinder side. A spring load adjusting device for a hydraulic shock absorber, wherein a stopper is fixedly provided on the outer periphery of a member, and a plurality of locking portions that selectively engage with the stopper are provided on a spring receiver provided on the outer periphery of the tubular member, wherein the fixing member is provided. Forming a notch extending in the cylinder axis direction, forming an inwardly extending claw on the inner periphery of the tubular member,
A spring load adjusting device for a hydraulic shock absorber, wherein the claw member is engaged with the notch, and the length of the notch in the cylinder radial direction is larger than the length of the claw.