JP2002054677A - Hydraulic shock absorber and spring load adjusting method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability and adjustive workability of a spring load adjusting device for a hydraulic shock absorber. SOLUTION: The spring load adjusting device 16 for a hydraulic shock absorber 10 has a stopper 81 fixed to the periphery of a damper cylinder 11, a cam adjuster 82 turnably fitted on the periphery of the damper cylinder 11 and provided along the circumference with a plurality of cam faces 82A of different heights capable of selective engagement with the stopper 81, and a screw adjuster 83 threadedly engaged with the periphery of the damper cylinder 11, provided with a spring bearing face 83A for supporting a suspension spring 13, and allowed to abut the cam adjuster 82 via the opposite end face to the spring bearing face 83A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hydraulic shock absorber and a method for adjusting a spring load thereof.

[0002]

2. Description of the Related Art Some hydraulic shock absorbers of motorcycles and the like have a spring load adjusting device for adjusting the spring load of a suspension spring interposed between a damper cylinder and a piston rod. Conventional spring load adjusting devices include those using a cam adjuster and those using a screw adjuster.

A spring load adjusting device using a cam adjuster engages one of a plurality of cam surfaces of a cam adjuster fitted on the outer periphery of a damper cylinder with a stopper on the outer periphery of the damper cylinder. The adjuster is set to the new adjustment position in a stepwise manner, and the suspension spring is carried by the cam adjuster.

In a spring load adjusting device using a screw adjuster, a screw adjuster screwed around an outer periphery of a damper cylinder is screwed to set the screw adjuster to a new adjustment position in a stepless manner, and the suspension spring is adjusted by the screw adjuster. Is carried.

[0005]

In the spring load adjusting device using the cam adjuster, when the cam adjuster is set to the new adjustment position, the cam adjuster slides on the stopper while supporting the spring load of the suspension spring. The wear of the stopper is severe. Then, in order to maintain the durability of the cam adjuster and the stopper, it is necessary to configure them with an iron-based material, and it is difficult to reduce the weight of the hydraulic shock absorber.

In the spring load adjusting device using the screw adjuster, since the screw adjuster is steplessly set to the new adjustment position, the original position is unknown, and the adjustment workability is poor.

[0007] It is an object of the present invention to improve the durability and the adjustment workability of a spring load adjusting device for a hydraulic shock absorber.

[0008]

According to a first aspect of the present invention, there is provided a hydraulic shock absorber having a spring load adjusting device for adjusting a spring load of a suspension spring interposed between a damper cylinder and a piston rod. The device is provided with a stopper fixed to the outer periphery of the damper cylinder and a plurality of cam surfaces on the periphery which are rotatably fitted to the outer periphery of the damper cylinder, selectively engage with the stopper, and have different heights. And a screw adjuster that is screwed to the outer periphery of the damper cylinder and has a spring receiving surface that supports the suspension spring, and that allows the end surface on the opposite end side of the spring receiving surface to abut against the cam adjuster. It is intended to have.

According to a second aspect of the present invention, there is provided a hydraulic shock absorber having a spring load adjusting device for adjusting a spring load of a suspension spring interposed between a damper cylinder and a piston rod. A cylindrical member provided on the outer periphery, a stopper fixed to the outer periphery of the cylindrical member, and a plurality of members which are rotatably fitted to the outer periphery of the cylindrical member, selectively engage with the stopper, and have different heights. A cam adjuster having a cam surface on its periphery and a spring receiving surface that is screwed to the outer periphery of the cylindrical member to support a suspension spring, and the end surface on the opposite end side of the spring receiving surface to the cam adjuster. And a screw adjuster capable of abutment.

According to a third aspect of the present invention, in the first or second aspect, an elastic member is further provided between the outer periphery of the damper cylinder or the cylindrical member and the inner periphery of the cam adjuster.

According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the damper cylinder is disposed above and the piston rod is disposed below, and a gap between an outer periphery of the damper cylinder and an inner periphery of the cam adjuster is provided. An elastic member is interposed.

According to a fifth aspect of the present invention, the cam surface of the cam adjuster comprises an inclined surface inclined with respect to the axial direction of the damper cylinder, and adjacent cam surfaces are connected by a vertical surface along the axial direction. It was done.

According to a sixth aspect of the present invention, in the first aspect, the damper cylinder or the cylindrical member is made of a light alloy, and the stopper is integrally formed. is there.

According to a seventh aspect of the present invention, there is provided a method for adjusting a spring load of a hydraulic shock absorber according to the first or second aspect, wherein the screw adjuster is screwed in a direction in which the suspension spring compresses to make abutment with the cam adjuster. Uncoupling, rotating the cam adjuster, engaging one of the plurality of cam surfaces with the stopper, setting the cam adjuster to the new adjustment position, and screwing the screw adjuster in the extension direction of the suspension spring. Then, the initial load of the suspension spring is adjusted by abutting against the cam adjuster and supporting the suspension spring via the screw adjuster on the cam adjuster set at the new adjustment position.

[0015]

According to the first, second, sixth and seventh aspects of the invention, the following effects are obtained. When changing the cam adjuster to the new adjustment position,
The screw adjuster is screwed in the contraction direction of the suspension spring to release the abutment with the cam adjuster. Therefore, the cam adjuster can be freely rotated without receiving the spring load of the suspension spring to change the engagement position with the stopper, so that the stopper is not severely worn, and the durability of the cam adjuster and the stopper can be improved. .

Since the stopper is not worn excessively, it is not necessary to use an iron-based material for maintaining the durability of the stopper and the damper cylinder or the cylindrical member integrally formed with the stopper. The hydraulic shock absorber can be made lighter by being made of an alloy.

The initial load of the suspension spring is adjusted by changing the cam adjuster to a new adjustment position in a stepwise manner, so that the original position is not obscured and the adjustment workability is good.

According to the third and fourth aspects of the present invention, the following operations are provided. Even if the screw adjuster is screwed in the compression direction of the suspension spring to release the abutment with the screw adjuster as described above, the cam adjuster is provided with a damper cylinder or a cylindrical member due to the elasticity imparted by the elastic member. Continue to be held lightly around. Thereby, the cam adjuster does not rotate freely and does not drop under its own weight, and the adjustment workability can be improved.

According to the fifth aspect of the invention, the following effects are obtained. Adjacent cam surfaces of the cam adjuster are connected by a vertical surface along the axial direction of the damper cylinder, and there is no need for an inclined connecting portion extending in the circumferential direction. Therefore, the number of cam steps in the circumferential direction can be increased. This allows fine adjustment of the spring load. Further, since the contact surface between the cam surface and the stopper can be made large, the surface pressure of the stopper can be reduced, and even when the stopper is made of a light alloy such as aluminum, there is no danger.

[0020]

1 is a half sectional view showing a hydraulic shock absorber, FIG. 2 is a side view of FIG. 1, FIG. 3 is a plan view of FIG. 1, FIG. 4 is an enlarged view of a main part of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2.

As shown in FIGS. 1 and 2, the hydraulic shock absorber 10 has a hollow piston rod 12 inserted into a damper cylinder 11, and a suspension spring 13 interposed between the cylinder 11 and the piston rod 12.

The cylinder 11 has a vehicle-side mounting member 14, and the piston rod 12 has a wheel-side mounting member 15. A screw adjuster 83 (described later) constituting the spring load adjusting device 16 is screwed to the outer peripheral portion of the cylinder 11, and a spring receiver 18 is fixed to the piston rod 12, and a suspension is provided between the screw adjuster 83 and the spring receiver 18. Spring 1
3, the set length (initial load) of the suspension spring 13 can be adjusted by the operation of the spring load adjusting device 16 described later. The elastic force of the suspension spring 13 absorbs the impact force that the vehicle receives from the road surface.

The cylinder 11 has a rod guide 21 through which the piston rod 12 passes. The rod guide 21
As shown in FIG. 1, the O-ring 22A, the stopper ring 22
A liquid-tightly mounted on the cylinder 11 via B,
The piston rod 12 is slidably slidable in a liquid-tight manner at the inner diameter portion provided with the oil seal 23, the bush 24, and the dust seal 25. The cylinder 11 has a compression-side bumper 26 outside the rod guide 21, and the compression-side bumper 2 is attached to a bumper stopper 27 of the piston rod 12 at the time of the maximum compression.
6, the maximum compression stroke can be regulated.
Further, the cylinder 11 includes a washer 28A and an extension-side bump rubber 28 inside the rod guide 21.

The hydraulic shock absorber 10 has a piston valve device (compression-side and extension-side damping force generator) 30. The hydraulic shock absorber 10 suppresses the expansion and contraction vibration of the cylinder 11 and the piston rod 12 due to the absorption of the impact force by the suspension spring 13 by the damping force generated by the piston valve device 30.

As shown in FIG. 1, the piston valve device 30 includes a valve stopper 31, a pressure-side valve 32, and a piston 3 at the end of the piston rod 12 inserted into the cylinder 11.
3. The extension side valve 34 and the valve stopper 35 are mounted, and these are fixed by the nut 36.

The piston 33 comes into sliding contact with the inside of the cylinder 11 in a liquid-tight manner via an O-ring 37A and a piston ring 37B provided on the outer peripheral portion, and the inside of the cylinder 11 communicates with a piston-side oil chamber 38A in which the piston rod 12 is not accommodated. , And a rod-side oil chamber 38B in which the piston rod 12 is housed. The piston 33 includes a compression-side valve 32 and a compression-side flow path 39 (not shown) that enables communication between the piston-side oil chamber 38A and the rod-side oil chamber 38B. An extension-side flow path 40 that allows communication with the rod-side oil chamber 38B is provided.

The piston valve device 30 has a damping force adjusting device 41 shown in FIG.

The damping force adjusting device 41 includes a piston rod 1
2, a bypass passage 42 is formed to allow communication between the piston-side oil chamber 38A and the rod-side oil chamber 38B, and this bypass passage 42 is connected to a vertical hole 42A opening to the piston-side oil chamber 38A and a rod-side oil chamber 38B. It is constituted by an open lateral hole 42B. The damping force adjusting device 41 allows the adjusting rod 43 to move in the hollow direction of the piston rod 12 in the axial direction,
The opening area of the valve seat 42C provided at the open end of the vertical hole 42A of the bypass passage 42 is adjusted by the needle valve 43A at the distal end, which is inserted in a liquid-tight manner via the ring 44.
At this time, the adjustment rod 43 has its base end extending from the piston rod 12 to the mounting member 15 side, and has an abutting portion 45 on the end face of the base end. And the adjustment rod 4
The contact portion 3 is caused to protrude in a direction in which the contact portion 45 abuts against an adjuster 51 described later by a thrust force based on the hydraulic pressure of the piston side oil chamber 38A.

The adjuster 51 is provided on a mounting member 15 fixed to the outer end of the piston rod 12, and is supported by a mounting hole 52 formed in the vehicle width direction and intersecting the adjusting rod 43 in the axial direction. The abutting portion 45 of the adjustment rod 43 is directly contacted to advance and retreat the adjustment rod 43 in the axial direction.
The opening area of the valve seat 42C is adjusted so that the extension-side damping force can be adjusted. Specifically, the adjuster 51 is inserted from the screw hole 52A of the mounting hole 52, and the grooved operation portion 51B at the tip is pivotally supported in a liquid-tight manner through the O-ring 53 to the support hole 52B of the mounting hole 52, Insert the screw portion 51A into the mounting hole 5
2 and is screwed into the second screw hole 52A, and the intermediate tapered cam surface 5
1C is brought into contact with the contact portion 45 of the adjustment rod 43. Thereby, the adjuster 51 is provided with the grooved operation portion 51B.
Is rotated and screwed by the rotary operation tool engaged in the groove of the first surface, and the adjustment rod 43 can be advanced and retracted in the axial direction by the displacement of the cam surface 51C. The screw hole 52 of the mounting hole 52
A is sealed by the plug 54.

At this time, the plug 54 is connected to the adjuster 51
When the valve seat 42 </ b> C is fully closed by the needle valve 43 </ b> A of the adjustment rod 43, the screw is set at a position where the proximal end surface of the screw portion 51 </ b> A of the adjuster 51 abuts. Thereby, the adjuster 51 sets the fully closed position of the valve seat 42C which abuts on the plug 54 as the adjustment reference position,
The opening degree of the valve seat 42C can be adjusted by screwing in the returning direction such as one rotation, two rotations, etc. from this reference position, and the adjustment can be facilitated.

As shown in FIG. 3, the hydraulic shock absorber 10 has a reservoir 60 connected to a piston side oil chamber 38A of the cylinder 11 via a separator 61. The reservoir 60 is partitioned by a partition member 63 into an oil chamber 64A and a gas chamber 64B, and has a gas sealing valve 65 for sealing a pressurized gas into the gas chamber 64B. The separator 61 includes a pressure side flow path 66 and an expansion side flow path 67 that connect the piston side oil chamber 38A of the cylinder 11 and the oil chamber 64A of the reservoir 60, and inserts the needle valve 69 of the adjustment member 68 into the pressure side flow path 66. The extension side check valve 70 is provided in the extension side flow path 67. The adjusting member 68 is screwed into the cap 71 in a liquid-tight manner via an O-ring 68A, and the cap 71 is fixed to the reservoir 60 via an O-ring 71A.
The adjusting member 68 is screwed by the cap 71 to advance and retreat,
The opening area of the pressure side flow path 66 is adjusted by the needle valve 69.

Accordingly, the hydraulic shock absorber 10 performs a damping action as follows. (During compression) The oil in the piston-side oil chamber 38A flows through the pressure-side flow path 39 to the rod-side oil chamber 38B, and the oil bends and deforms the pressure-side valve 32 to obtain a pressure-side damping force. Subsequently, the oil corresponding to the volume of the piston rod 12 that has entered the cylinder 11 becomes excessive, and the excess oil flows from the piston-side oil chamber 38A to the oil chamber 64A of the reservoir 60 through the pressure-side flow path 66 of the separator 61. The pressure is damped by the throttle resistance of the needle valve 69 during the discharge.

When the relative speed between the cylinder 11 and the piston rod 12 is low, the oil in the rod-side oil chamber 38B is adjusted by the needle valve 43A of the adjustment rod 43 to adjust the degree of opening of the piston rod 12. 42, and flows into the piston side oil chamber 38A.
The extension side damping force is obtained by the drawing resistance by 3A. When the relative speed between the cylinder 11 and the piston rod 12 is medium to high, oil in the rod-side oil chamber 38B passes through the extension-side flow path 40,
The extension side valve 34 is flexed and deformed to make the piston side oil chamber 38A.
Flow to obtain the extension side damping force. At this time, the amount of oil corresponding to the retreat volume of the piston rod 12 retreating from the cylinder 11 is insufficient, and the insufficient oil flows from the oil chamber 64A of the reservoir 60 to the piston-side oil chamber 38A through the extension flow path 67 of the separator 61. Will be replenished promptly.

The vibration of the hydraulic shock absorber 10 is suppressed by the damping force on the compression side and the expansion side.

When the hydraulic shock absorber 10 is fully compressed, the bumper 26 on the side of the cylinder 11 and the bumper stopper 27 on the side of the piston rod 12 perform a buffering operation at the time of maximum compression. When the hydraulic shock absorber 10 is fully extended, the bump rubber 28 on the side of the cylinder 11 and the piston rod 12
By the abutment with the valve stopper 31 on the side of, the cushioning function at the time of extension and extension is achieved.

However, in the hydraulic shock absorber 10, the spring load adjusting device 16 for adjusting the initial load (set length) of the suspension spring 13 is configured as follows (FIGS. 4 and 5). ).

The spring load adjusting device 16 includes a stopper 81 integrally formed on the outer periphery of the cylinder 11.
Of each cam surface 8 of the cam adjuster 82
The slope is set to be the same as the slope of 2A. The spring load adjusting device 16 rotatably fits the cam adjuster 82 on the outer periphery of the cylinder 11, and the cam adjuster 82 is selectively engaged with the stopper surface 81 </ b> A of the stopper 81, and a plurality of cam adjusters 82 having different heights are provided. The cam surface 82 </ b> A having a flat inclined surface is provided stepwise in the circumferential direction. Further, the spring load adjusting device 16 includes a screw adjuster 83 that is screwed into a screw portion 11A provided on the outer periphery of the cylinder 11. The screw adjuster 83 includes a spring receiving surface 83A that supports the suspension spring 13, and allows the abutting end surface 83B opposite to the spring receiving surface 83A to abut on the lower end abutting surface 82B of the cam adjuster 82.

At this time, the spring load adjusting device 16 moves the O.D. between the outer circumference of the cylinder 11 and the inner circumference of the cam adjuster 82.
An elastic member 84 such as a ring is interposed in a pressed state. In the present embodiment, the elastic member 84 is the cam adjuster 82
Is mounted in the annular groove on the inner circumference.

In the spring load adjusting device 16, the cam surface 82A of the cam adjuster 82 has the above-mentioned flat inclined surface which is inclined so that the tip end (the lower cam step) is higher in the axial direction of the cylinder 11. , Adjacent cam surfaces 82A, 82A
Are connected by a vertical surface 85 along the axial direction, and as a result, the cam surface 82A is connected in a stepwise shape having a sawtooth shape in the circumferential direction. By increasing the tip of the cam surface 82A, the cam adjuster 82 can be prevented from rotating in the lower direction of the cam step.

In the hydraulic shock absorber 10, the cylinder 11 is made of an aluminum alloy and the stopper 8
1 is integrally formed from this aluminum alloy.

Accordingly, the procedure for adjusting the spring load by the spring load adjusting device 16 is as follows. (1) The screw adjuster 83 is screwed in the direction in which the suspension spring 13 contracts (downward), and the abutment with the cam adjuster 82 is released. At this time, due to the presence of the elastic member 84, the cam adjuster 82 does not fall by its own weight even if the screw adjuster 83 is lowered.

(2) The cam adjuster 82 is rotated by manual operation, and one cam surface 82A selected from the plurality of cam surfaces 82A is brought into contact with the stopper surface 81A of the stopper 81, whereby the cam adjuster 82 is rotated. To the new adjustment position.

(3) The screw adjuster 83 is screwed in the extension direction (upward) of the suspension spring 13 to
B against the lower end abutting surface 82B of the cam adjuster 82,
Lock. Accordingly, the suspension spring 13 is carried by the cam adjuster 82 set at the new adjustment position via the screw adjuster 83, and the initial load (set length) is set.

In the hydraulic shock absorber 10, a screw member 92 is formed in a hole 91 provided at the vehicle body side end of the cylinder 11 in order to adjust the mounting interval between the vehicle body side mounting member 14 and the wheel side mounting member 15. Is fixed, and a male thread portion 93 provided on the vehicle body-side mounting member 14 is screwed into an inner peripheral thread portion of the screw member 92, and this can be locked by a lock nut 94. Screw member 9
Reference numeral 2 indicates that the inner peripheral thread is a right-hand thread, while the outer peripheral thread, which is a left-hand thread, is screwed into the opening thread of the hole 91, and the outer thread is screwed to the opening thread with an adhesive. Is stuck. In addition, a stopper 95 is engaged with the distal end side of the external thread portion 93 of the vehicle body-side mounting member 14, and the stopper 95 can be locked to the inner end surface of the screw member 92 to prevent the stopper member from falling off. On the outer end surface of the screw member 92, a tool engagement groove for screwing the screw member 92 into the opening screw portion of the hole 91 is formed in the diameter direction.

According to the present embodiment, the following operations are provided. When the cam adjuster 82 is switched to the new adjustment position, the screw adjuster 83 is screwed in the direction in which the suspension spring 13 contracts, and the abutment with the cam adjuster 82 is released. Therefore, the cam adjuster 82 is connected to the suspension spring 1.
The stopper 81 can be freely rotated without receiving the spring load to change the engagement position with the stopper 81, so that the stopper 81 is not worn excessively and the durability of the cam adjuster 82 and the stopper 81 can be improved.

Since the stopper 81 is not worn excessively, it is not necessary to use a ferrous material to maintain the durability of the stopper 81 and the damper cylinder 11 integrally formed with the stopper 81. And the weight of the hydraulic shock absorber 10 can be reduced.

The initial load of the suspension spring 13 is adjusted by changing the cam adjuster 82 to a new adjustment position in a stepwise manner, without changing the original position.
Adjustment workability is good.

Even if the screw adjuster 83 is screwed in the contraction direction of the suspension spring 13 to release the abutment with the screw adjuster 83, the cam adjuster 82 has the elasticity provided by the elastic member 84. As a result, it is maintained lightly around the damper cylinder 11. Thereby, the cam adjuster 82 does not rotate freely and does not drop by its own weight, and the adjustment workability can be improved.

The adjacent cam surface 82 of the cam adjuster 82
Since A is connected by a vertical surface along the axial direction of the damper cylinder and does not require an inclined connecting portion extending in the circumferential direction, the number of cam steps in the circumferential direction can be increased. This allows fine adjustment of the spring load. Further, since the contact surface between the cam surface 82A and the stopper 81 can be made large, the surface pressure of the stopper 81 can be reduced, and even when the stopper 81 is made of a light alloy such as aluminum, there is no slack. .

In the present invention, a cylindrical member is fixed to the outer periphery of a portion of the piston rod 12 protruding from the cylinder 11, and a stopper is fixedly provided on the outer periphery of the cylindrical member. A cam adjuster is rotatably fitted on the outer periphery, and a screw adjuster is screwed onto the outer periphery of the cylindrical member. The suspension spring 13 is supported by the spring receiving surface of the screw adjuster, and is opposite to the spring receiving surface of the screw adjuster. The side end surface may be configured to abut against the cam adjuster.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design may be changed without departing from the scope of the present invention. The present invention is also included in the present invention.

[0052]

As described above, according to the present invention, in the spring load adjusting device for the hydraulic shock absorber, the durability and the adjusting workability can be improved.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing a hydraulic shock absorber.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is an enlarged view of a main part of FIG. 1;

FIG. 5 is an enlarged view of a main part of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hydraulic shock absorber 11 Damper cylinder 12 Piston rod 13 Suspension spring 16 Spring load adjusting device 81 Stopper 82 Cam adjuster 82A Cam surface 83 Screw adjuster 83A Spring receiving surface 84 Elastic member 85 Vertical surface

Claims (7)

[Claims] 1. A hydraulic shock absorber having a spring load adjusting device for adjusting a spring load of a suspension spring interposed between a damper cylinder and a piston rod, wherein the spring load adjusting device is fixed to an outer periphery of the damper cylinder. A stopper, a cam adjuster rotatably fitted on the outer periphery of the damper cylinder, selectively engaging with the stopper, and having a plurality of cam surfaces having different heights on the periphery, and a screw on the outer periphery of the damper cylinder. A hydraulic adjuster, comprising: a spring receiving surface for supporting the suspension spring; and a screw adjuster capable of abutting the end surface on the opposite side of the spring receiving surface to the cam adjuster. 2. A hydraulic shock absorber having a spring load adjusting device for adjusting a spring load of a suspension spring interposed between a damper cylinder and a piston rod, wherein the spring load adjusting device includes a cylinder provided on an outer periphery of a piston rod. A stopper fixed to the outer periphery of the cylindrical member; and a rotatable fit around the outer periphery of the cylindrical member. The stopper selectively engages with the stopper and surrounds a plurality of cam surfaces having different heights. A cam adjuster provided thereon, a spring receiving surface screwed to the outer periphery of the cylindrical member to support the suspension spring, and an end face on the opposite end of the spring receiving surface can be abutted against the cam adjuster. A hydraulic shock absorber having a screw adjuster. 3. The hydraulic shock absorber according to claim 1, wherein an elastic member is interposed between an outer periphery of the damper cylinder or the cylindrical member and an inner periphery of the cam adjuster. 4. An elastic member is interposed between an outer periphery of the damper cylinder and an inner periphery of the cam adjuster, wherein the damper cylinder is disposed above and the piston rod is disposed below.
Or the hydraulic shock absorber according to 2. 5. The cam adjuster according to claim 1, wherein a cam surface of the cam adjuster comprises an inclined surface inclined with respect to an axial direction of the damper cylinder, and adjacent cam surfaces are connected by a vertical surface along the axial direction. The hydraulic shock absorber according to any of the claims. 6. The hydraulic shock absorber according to claim 1, wherein the damper cylinder or the cylindrical member is made of a light alloy, and the stopper is integrally formed. 7. The method for adjusting a spring load of a hydraulic shock absorber according to claim 1, wherein the screw adjuster is screwed in a compression direction of the suspension spring to release abutment with the cam adjuster. By rotating and engaging one of the plurality of cam surfaces with the stopper, the cam adjuster is set to the new adjustment position, and the screw adjuster is screwed in the direction in which the suspension spring extends to the cam adjuster. A spring load adjusting method for a hydraulic shock absorber, wherein the initial load of the suspension spring is adjusted by abutting the suspension spring and supporting the suspension spring via the screw adjuster on the cam adjuster set at the new adjustment position.