JPH0996333A - Mounting length adjustment structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent riding comfort from being degraded when the mounting length adjustment structure is mounted onto a vehicle by enabling the extension/contraction of a hydraulic shock absorber in response to the quantity of its change when the mounting length of the hydraulic shock absorber is changed, and furthermore enabling the set length of a suspension spring to be also changed. SOLUTION: In an adjustment structure, a piston rod P consisting of a hydraulic shock absorber with respect to a cylinder C consisting of the hydraulic shock absorber, is interlinked in such a way that it can appear/disappear under the disposition of a suspension spring S, and concurrently a mounting member 1 to the body side or the axle side of a vehicle is provided for the base end of the piston rod P in such a way that it can be moved in the axial direction of the piston rod P under the disposition of a lock nut 2. The aforesaid structure comprises a rod holder 4 fixedly set at the base end part (P1) of the piston rod P, concurrently comprises the mounting member 1 threadedly fixed to the rod holder 4 in such a way that it can be moved in the axial direction under the disposition of the lock nut 2, also comprises a spring receiver 6 set aside, which locks one end of the suspension spring S to the lock nut 2, and concurrently comprises the spring receiver 6 set to the stroke stopper while being faced to the one end C1 of the cylinder C when the hydraulic shock absorber is mostly compressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a mounting length adjusting structure used for changing a mounting length in a hydraulic shock absorber for a vehicle.

[0002]

2. Description of the Related Art Conventionally, there have been various proposals for a mounting length adjusting structure in a hydraulic shock absorber for a vehicle. For example, in the proposal disclosed in Japanese Utility Model Laid-Open No. 61-191540, the hydraulic shock absorber is disclosed. The mounting member on the axle side of the hydraulic shock absorber is screwed under the distribution of the lock nut so as to be movable in the axial direction of the hydraulic shock absorber with respect to the housing member forming the bottom end of the hydraulic shock absorber. .

Therefore, according to this proposal, the screwing length between the housing member and the mounting member can be changed by loosening the lock nut and rotating the mounting member or the housing member side. As a result, the entire length of the hydraulic shock absorber at the maximum extension, that is, the mounting length of the hydraulic shock absorber is changed.

However, in the above-mentioned conventional proposal, even if the mounting length of the hydraulic shock absorber is changed, the expansion / contraction length of the hydraulic shock absorber is not changed. Therefore, for example, when the mounting length is shortened, , There is a risk that the following inconveniences will occur.

That is, although the installation length of the hydraulic shock absorber is shortened, the distance between the axle side and the vehicle body side is narrowed, but the expansion / contraction length is not changed to be short. Depending on the situation, there is a fear that the wheels may contact the vehicle body side, for example, in the case of a motorcycle, the wheels may contact the fender.

In a motorcycle, if the wheels come into contact with the fenders, the steering stability will be significantly lost, and there will be a fear of a steering error or an accident accompanying it.

On the other hand, when adjusting the expansion / contraction length along with the adjustment of the mounting length of the hydraulic shock absorber, especially when the mounting length and the expansion / contraction length are shortened, the suspension spring in the hydraulic shock absorber is adjusted. If the set length of the hydraulic shock absorber is also shortened, there is a danger that the shock will increase when the hydraulic shock absorber is fully extended.

When the shock at the time of full extension becomes large, it becomes necessary to set the full extension structure of the hydraulic shock absorber to a sturdy structure, and when it is mounted on a vehicle, There is also a fear that it will make the ride in the car uncomfortable.

Therefore, the present invention was devised in view of the above circumstances, and its purpose is to:
When changing the mounting length of the hydraulic shock absorber, the expansion / contraction length of the hydraulic shock absorber can be adjusted according to the amount of change, and the set length of the suspension spring can also be changed. The object of the present invention is to provide a mounting length adjusting structure that can prevent deterioration of riding comfort in a vehicle when mounted on a vehicle and is optimal for use in a hydraulic shock absorber for the vehicle.

[0010]

In order to achieve the above-mentioned object, the structure of the present invention has a structure in which a piston rod constituting a hydraulic shock absorber is retracted from a cylinder constituting a hydraulic shock absorber under a suspension spring. In a mounting length adjusting structure that is movably connected to the base end side of the piston rod and has a mounting member for the vehicle body side or axle side of the vehicle movably in the axial direction of the piston rod under the distribution of a lock nut. ,
A rod holder is fixed to the base end portion of the piston rod, and a mounting member is screwed to the rod holder under the distribution of the lock nut so as to be movable in the axial direction of the rod holder. It is assumed that a spring receiver that locks one end of the hydraulic shock absorber is adjacent to the spring receiver and that the spring receiver is set as a stroke stopper at the time of maximum compression of the hydraulic shock absorber so as to face one end of the cylinder.

Preferably, the spring receiver has a tubular portion adjacent to the lock nut, and an annular collar portion horizontally connected to the outer periphery of the tubular portion, and the annular collar portion is provided. It is assumed that the outer circumference of the tubular portion is displaced from the axial center of the tubular portion.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the drawings. The mounting length adjusting structure according to the present invention is embodied in a hydraulic shock absorber for a vehicle in the illustrated embodiments. And the hydraulic shock absorber, as shown in FIG.
Roughly like this type of hydraulic shock absorber, for example, a piston rod P, which is a vehicle body side member, is connected to a cylinder C, which is an axle side member, so as to be retractable under the suspension spring S. It becomes.

In the hydraulic shock absorber, a mounting member 1 for a vehicle body (not shown) of a vehicle can be moved to a base end side of a piston rod P which is an upper end side in the drawing while a lock nut 2 is distributed. It is supposed to have.

However, the mounting member 1 and the lock nut 2
In this embodiment, the piston rod P is movably screwed to a rod holder 4 fixed to a base thread portion P1 which is a base end portion of the piston rod P under the lock nut 3. .

That is, in the illustrated embodiment, the rod holder 4 is formed in the shape of a thread rod having a relatively large diameter, and the base end thread portion P of the piston rod P is attached to the shaft center portion.
1 is screwed together, and the lock nut 3 also screwed to the proximal end thread portion P1 is adjacent to the lower end and is held in a fixed state at a predetermined position.

The mounting member 1 in the illustrated embodiment has a pair of opposing bracket portions 1 on the upper end side in the drawing.
a, and a cylindrical screwing portion 1b which is integrally connected to the lower ends of the pair of bracket portions 1a and is on the lower end side in the drawing, and the screwing portion 1b of the rod holder 4 is provided. It is supposed that it is screwed so as to be movable to the outer periphery on the upper half side, that is, so as to be able to descend to the lower half side of the rod holder 4, as shown in FIGS.

Incidentally, the amount of movement of the mounting member 1 with respect to the rod holder 4 is determined by the length of the rod holder 4 and the screwing length with the lock nut 2 which will be described later, and is shown using FIGS. 1 and 2. For example, it becomes (L-L1).

Further, in the illustrated embodiment, the mounting member 1 is also set so as to be separated upward from the rod holder 4 by its rotating operation.

The bracket portion 1a has a through hole 1c on its upper end side, which allows connection to the vehicle body side.

The lock nut 2 is movably screwed to the lower half side of the rod holder 4 while being adjacent to the lower end of the mounting member 1, and has a rotating operation portion 2a on the outer periphery of the upper half side. In addition to having the stopper portion 2 of the cushion member 5 at the lower end
b.

Incidentally, the cushion member 5 is made of a highly elastic material such as rubber and is movably interposed on the outer periphery of the piston rod P on the proximal end side so that the hydraulic shock absorber is in the most compressed state. When approaching, the lower end, which is the tip, collides with the one end C1, which is the upper end, of the cylinder C, and is set to bend within an allowable range.

Then, the rear end of the cushion member 5 is brought into contact with the stopper portion 2b.

On the other hand, the lock nut 2 has a step portion 2 formed by reducing the diameter of the lower half between the upper half and the lower half.
The upper end of the spring receiver 6 is locked to the stepped portion 2c.

The spring receiver 6 has a tubular portion 6a whose upper end is adjacent to the lock nut 2 and an annular flange portion 6b which is horizontally connected to the outer periphery of the tubular portion 6a. That is, the annular collar portion 6b is displaced from the center of the tubular portion 6a in the axial direction on the outer periphery of the tubular portion 6a.

Incidentally, the size of displacement of the annular collar portion 6b is preferably 1/2 or more of the moving amount (L-L1) of the mounting member 1 and 1 / the moving amount (L-L1). It is not preferable that the number is 2 or less.

The inner periphery of the upper half of the tubular portion 6a is in sliding contact with the outer periphery of the lower half of the lock nut 2, and the lower end of the tubular portion 6a is one end which is the upper end of the cylinder C. The annular collar portion 6b faces the C1 and carries the upper end of the suspension spring S via a spring guide G adjacent to the lower end surface thereof.

In the illustrated embodiment, the spring guide G has a lower end formed into a cylindrical shape having a length capable of always covering the upper end of the cylinder C from the outer peripheral side, and the cylinder C of the piston rod P. The projecting / retracting portion of the piston rod P is constantly covered so that the piston rod P can be prevented from being damaged by flying stones or the like.

Regarding the suspension spring S, in the illustrated embodiment, the lower end of the suspension spring S is held by an appropriate holding means (not shown) arranged on the outer periphery of the cylinder C. In addition, the holding means is provided on the outer periphery of the cylinder C so as to be movable in the expansion / contraction direction of the hydraulic shock absorber.

Therefore, in the hydraulic shock absorber formed as described above, the piston rod P is retracted into and retracted from the cylinder C under the suspension spring S, but at this time. The mounting length of can be adjusted as follows.

That is, when assembling the hydraulic shock absorber, to be exact,
When the mounting member 1 is connected to the base end portion of the piston rod P, it is set to have a predetermined mounting length.
Specifically, the screwing position of the lock nut 2 that is screwed into the rod holder 4 is appropriately selected first, and subsequently, the mounting member 1 is screwed into the rod holder 4 from the so-called upper side to obtain a predetermined mounting length. Try to bring out the reality.

At this time, when the mounting length is set to be long, as shown in FIG. 1, the lock nut 2 is screwed onto the outer periphery of the rod holder 4 near the upper end side, and the mounting length is set to be short. In that case, as shown in FIG. 2, the lock nut 2 is screwed onto the outer periphery of the lower end side of the rod holder 4.

It should be noted that the position shown in FIG. 1 is the state where the mounting length is the longest, and the position shown in FIG. 2 is the state where the mounting length is the shortest.

As described above, when the lock nut 2 is screwed into the rod holder 4 and then the mounting member 1 is further screwed, the mounting member 1 is fixedly connected to the base end portion of the piston rod P. However, it goes without saying that at this time, the lock nut 2 and the mounting member 1 are adjacent to each other in a so-called close contact state.

In the hydraulic shock absorber with the mounting length set as described above, when the hydraulic shock absorber is in the most compressed state, one end C of the cylinder C facing the cushion member 5 is initially provided.
1 and it bends, and a cushioning effect is exhibited within the range of this bending.

When the compression is further advanced, the lower end of the tubular portion 6a of the spring receiver 6 collides with the one end C1 of the cylinder C, at which time the cushion member 5 is prevented from further bending. And further compression of the hydraulic shock absorber is prevented.

At this time, when the mounting length is set to be long and when the mounting length is set to be short, the amount of movement L of the mounting member 1 with respect to the rod holder 4 appears as a difference in the length of expansion and contraction. It will be different.

By the way, at the position shown in FIG. 2, the mounting length is set to be short, but at this time, the suspension spring S
Is in a state of being compressed by the above-described movement amount (L-L1) as the mounting length is shortened.

As a result, the set length of the suspension spring S in this state is forcedly shortened,
The shock is increased when the hydraulic shock absorber is fully expanded, that is, when it is fully expanded.

Therefore, in order not to increase the shock at the time of full extension, it is only necessary to dispose the spring receiver 6 upside down as shown in FIG.

That is, as described above, in this embodiment, the annular collar portion 6b of the spring receiver 6 has the spring receiver 6
It is supposed that it is arranged at a position displaced in one of the axial direction of the tubular portion 6a on the outer periphery of the tubular portion 6a.

Therefore, if the displacement amount of the annular collar portion 6b is set to 1/2 of the above-mentioned movement amount (L-L1), the movement amount (L-L1) can be obtained by reversing the spring receiver 6. ), The compression of the suspension spring S will be released.

As a result, as shown in FIG. 3, when the spring receiver 6 is arranged in an inverted manner as compared with the position shown in FIG. 1, the suspension spring S is set even if the mounting length of the hydraulic shock absorber is shortened. Since the length does not have to be shortened, it is possible to prevent the above-mentioned shock when the hydraulic shock absorber is fully extended from being increased.

Although the above description has been made on the assumption that the adjustment of the mounting length is executed at the time of assembling the hydraulic shock absorber before mounting it on the vehicle, it is possible to understand the purpose of the present invention and the structure of the hydraulic shock absorber. For example, the above-described mounting length can be adjusted in the hydraulic shock absorber mounted on the vehicle.

[0044]

As described above, in the present invention, the mounting length of the hydraulic shock absorber can be adjusted by moving the mounting member connected to the base end portion of the piston rod in the piston rod axial direction. When doing so, since the spring receiver that is also moved also serves as the stroke stopper, it is possible to adjust the mounting length and the expansion and contraction length corresponding to this, in particular,
Unnecessary compression of the hydraulic shock absorber will be prevented.

Further, in the present invention, since the spring retainer which is moved along with the movement of the mounting member displaces the annular collar portion which locks the suspension spring, the inverted arrangement is carried out by reversing the top and bottom. By doing so, it is possible to avoid the compression of the suspension spring due to the movement of the spring receiver, and in particular, the shock when the hydraulic shock absorber is fully extended will not be excessively increased.

As a result, according to the mounting length adjusting structure of the present invention, when the mounting length in the hydraulic shock absorber is changed,
The expansion / contraction length of the hydraulic shock absorber can be adjusted according to the change amount, and further, the set length of the suspension spring can be changed, so that the steering stability in the vehicle when mounted in the vehicle It is possible to prevent deterioration of riding comfort, and it is ideal for use as a hydraulic shock absorber for vehicles,
There is an advantage that is most suitable for expecting the improvement of its versatility.

[Brief description of drawings]

FIG. 1 is a partial front view showing a partially cutaway hydraulic shock absorber embodying a mounting length adjusting structure according to an embodiment of the present invention.

FIG. 2 is a view similar to FIG. 1 showing one mode in which the mounting length of the hydraulic shock absorber of FIG. 1 is adjusted.

FIG. 3 is a view showing another mode in which the mounting length is adjusted in the hydraulic shock absorber of FIG. 1, similar to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting member 2 Lock nut 4 Rod holder 6 Spring receiver 6a Cylindrical part 6b Annular flange part C Cylinder C1 One end of cylinder P Piston rod P1 Base end screw part that is the base end part of piston rod S Suspension spring

Claims (2)

[Claims] 1. A piston rod constituting the hydraulic shock absorber is connected to a cylinder constituting the hydraulic shock absorber so as to be retractable under the suspension spring, and the base end side of the piston rod is connected to the vehicle body side or the vehicle body side. In a mounting length adjusting structure in which a mounting member for the axle side is provided so as to be movable in the axial direction of the piston rod under the distribution of a lock nut, a rod holder is fixedly provided at the base end of the piston rod, and A mounting member is screwed to the rod holder under the distribution of the lock nut so as to be movable in the axial direction of the rod holder, and a spring receiver for locking one end of the suspension spring is adjacent to the lock nut. Mounting length adjustment structure in which the bridge is set as a stroke stopper facing the one end of the cylinder when the hydraulic shock absorber is in the most compressed state 2. A tubular portion in which a spring receiver is adjacent to a lock nut, and an annular collar portion that is horizontally connected to the outer periphery of the tubular portion.
The mounting length adjusting structure according to claim 1, wherein the annular collar portion is displaced from the center of the tubular portion in the axial direction on the outer periphery of the tubular portion.