JP2005003173A - Rotation stopper structure of adjuster - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To most suitably use a rotation stopper structure of an adjuster for a spring force adjusting mechanism. <P>SOLUTION: A spring seat 5 held by the adjuster 2 retractable by manual rotation and a coiled spring 4 is linked to a casing member 1 for screwing the adjuster 2 therein movably in the extension/retraction directions of the coiled spring 4 in the stopped state of rotation of the adjuster 2 in the rotating direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an adjuster detent structure, and more particularly to an improvement of an adjuster detent structure that ensures a stationary state of an adjuster that rotates and protrudes by manual operation.
[0002]
[Prior art]
There is a proposal to raise and lower the spring force of a coil spring that is an urging spring that is in contact with the adjuster by rotating the adjuster by manual operation so that the adjuster moves in and out of the casing member (see, for example, Patent Document 1). .
[0003]
In other words, this proposal proposes that when the adjuster provided at the upper end of the front fork is manually rotated, the spring force of the coil spring, which is a suspension spring that is distributed in the front fork and biases the front fork in the extending direction, is provided. Is said to be elevated.
[0004]
Therefore, according to this proposal, the reaction force caused by the coil spring in the front fork can be adjusted in level, and for example, the riding comfort of a two-wheeled vehicle according to the rider's preference can be realized.
[0005]
[Patent Document 1]
JP 2003-83382 A (paragraph 0013, paragraph 0014, paragraph 0015, paragraph 0024, FIG. 1)
[0006]
[Problems to be solved by the invention]
However, in the above proposal, it may be pointed out that the rotated adjuster may not be kept stationary.
[0007]
That is, vibration from the road surface is always input to the front fork of the traveling motorcycle, and therefore the coil spring, which is a suspension spring in the front fork, is constantly expanded and contracted.
[0008]
One end of the coil spring that is constantly expanded and contracted constantly repeats so-called reciprocating rotation. Therefore, even in an adjuster whose tip is in contact with one end of the coil spring, so-called reciprocating rotational force is always applied. Will be working.
[0009]
Therefore, even if a spring sheet is interposed between the coil spring and the adjuster, the spring sheet rotates with one end of the coil spring, so that the rotational force from the coil spring acts on the adjuster, and therefore the adjuster rotates.
[0010]
As a result, even if the adjuster is rotated and the spring force of the coil spring is adjusted, the adjuster rotates and the spring force changes during travel, so that the spring force adjusted as desired is permanently generated. There is a risk that it cannot be guaranteed.
[0011]
Accordingly, the present invention has been made in view of the above-described circumstances, and the object of the present invention can be embodied in, for example, a damping force generation mechanism or a spring force adjustment mechanism in a hydraulic shock absorber. It is to provide an adjuster detent structure that is optimal for expecting improved performance.
[0012]
[Means for Solving the Problems]
In order to achieve the above-described object, the structure of the rotation preventing structure of the adjuster according to the present invention is basically the same as that of the adjuster which is rotated by manual operation and protrudes and retracts and a tip is contacted with a coil spring via a spring sheet. In the non-rotating structure, it is assumed that the spring seat is connected to the casing member to which the adjuster is screwed so as to be movable in the expansion / contraction direction of the coil spring in a state in which the adjuster is prevented from rotating in the rotation direction.
[0013]
Therefore, even if one end of the expanding and contracting coil spring rotates, the rotational force at that time is interrupted by the spring sheet and is not transmitted to the adjuster, thereby preventing the adjuster from rotating.
[0014]
In the above-described configuration, more specifically, the connecting body in which the base end portion is integrally held in the body portion of the adjuster, and the distal end portion that is present inside the coil spring in the connecting body. Suppose that the spring seat is deformed and fitted.
[0015]
Therefore, the tip of the coupling body held by the adjuster is linked to the state in which the rotation is prevented by the spring seat that is maintained in a state in which the rotation is prevented with respect to the casing member, so that the rotation of the adjuster is accurately prevented. The
[0016]
At this time, the base end portion of the connecting body may be connected to the body of the adjuster under the detent mechanism. In this case, the integrity between the connecting body and the adjuster can be ensured, and the rotation of the adjuster can be ensured. Can be realized in stages.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
In the following, the present invention will be described based on the illustrated embodiment. However, in the illustrated case, the non-rotating structure of the adjuster according to the present invention is embodied in a damping force generation mechanism in a hydraulic shock absorber.
[0018]
That is, as shown in FIG. 1, in this embodiment, the hydraulic shock absorber is configured such that a tank T as a reservoir is connected to a shock absorber body D that expands and contracts, and a flow path that communicates between both D and T. The damping force generating mechanism A disposed therein embodies an adjuster detent structure according to the present invention.
[0019]
At this time, it is assumed that the damping force generating mechanism A is formed and assembled into a headed bolt shape for fixing the connecting portion T1 extending from the tank T to the mounting portion D1 extending from the shock absorber body D. Yes.
[0020]
Therefore, in the illustrated case, in the damping force generation mechanism A, it is possible to form assemblies having different characteristics by variously selecting the setting of the damping unit 3 and the biasing spring 4 described later. Become.
[0021]
By the way, as shown in FIG. 2, the damping force generating mechanism A has an adjuster 2 that is rotatably held by the casing member 1, and has a damping portion 3 that is disposed so as to face the adjuster 2. It becomes.
[0022]
Further, the damping force generation mechanism A has a biasing spring 4 as a coil spring between the damping portion 3 and the adjuster 2, and further, the biasing spring 4 and the adjuster 2 are connected to each other. It has a spring seat 5 sandwiched between them.
[0023]
Explaining briefly, the casing member 1 has a screw thread 1b on the outer periphery of a tip end portion 1a which is the left end portion in the drawing, and by rotating the base end portion 1c which is the right end portion in the drawing, the screw member 1 1b is screwed into a screw thread D2 formed on the mounting part D1 of the shock absorber body D, and at the time of this screwing, a flange-like stopper part 1d connected to the base end part 1c is connected to the connecting part of the tank T. It is supposed to be brought into contact with T1.
[0024]
Then, the damping part 3 is fixed inside the front end part 1a of the casing member 1. As shown in the figure, the valve seat member 3a forming the damping part 3 is caulked to the inside of the front end of the casing member 1. It is said that it will become established.
[0025]
By the way, the damping force generating unit 3 includes a pressure side damping valve 3b that comes into contact with the valve seat member 3a so as to be separable, and a check valve 3c that comes into contact with the pressure side damping valve 3b. Have.
[0026]
Then, when the shock absorber main body D contracts, the hydraulic oil from the shock absorber main body D flows into the tank T via the pressure side damping valve 3b, thereby generating a predetermined pressure-side damping force. The hydraulic oil from the tank T returns to the shock absorber main body D via the check valve 3c, so that a predetermined extension side damping force is generated.
[0027]
At this time, the urging spring 4 has the other end at the left end in the drawing in contact with the back surface of the compression side damping valve 3b. Therefore, the spring force of the urging spring 4 is changed in level. That is, in the drawing, the expansion / contraction stroke of the urging spring 4 is changed by the advance / retreat of the adjuster 2 described later, so that the cracking pressure in the compression side damping valve 3b is changed in level and is generated in the compression side damping valve 3b. The compression side damping force is changed in level.
[0028]
Next, the adjuster 2 includes a screw thread 1e formed on the inner periphery of the casing member 1 with a screw thread 2c formed on the outer periphery of the body part 2b having a larger diameter than the operation part 2a on the right side in the drawing. In the casing member 1, the biasing spring 4 moves in the expansion / contraction direction, that is, advances and retreats when the operation unit 2 a is rotated.
[0029]
In the adjuster 2, a protruding portion 2d which is the left side in the drawing and is present inside the biasing spring 4 is connected to the tip of the body portion 2b, and the protruding portion 2d is connected to the spring seat. 5 is a guide unit connected to the 5.
[0030]
Incidentally, since it is sufficient that the projecting portion 2d is formed to have a sufficient diameter necessary as a guide portion, it is not only smaller than the trunk portion 2b, but also smaller than the operation portion 2a. It is formed to become.
[0031]
On the other hand, as shown in FIG. 3, the spring seat 5 is generally formed in an annular shape, and has a guide hole 5a through which the protruding portion 2d is inserted at the center, and is so-called up and down in the drawing. It has a pair of locking pieces 5b formed in a crescent shape on both sides.
[0032]
In the spring seat 5, the pair of guides formed by cutting the thread 1 e formed on the inner periphery of the casing member 1 in the extending direction of the biasing spring 4. It is supposed to be fitted in the groove 1f.
[0033]
Therefore, in the spring seat 5, the pair of locking pieces 5b are fitted in the pair of guide grooves 1f, thereby preventing the adjuster 2 from rotating along the rotation direction.
[0034]
As a result, even when one end of the urging spring 4 in contact with the spring sheet 5 rotates under a state in which the spring force of the urging spring 4 acts on the spring sheet 5, the rotational force at that time is not increased. The spring sheet 5 is insulated and no longer propagates to the adjuster 2, and the adjuster 2 is prevented from rotating.
[0035]
In view of the above, the above-described spring seat 5 and the casing member 1 connecting the spring seat 5 form an adjuster detent structure according to the present invention. Therefore, in realizing the present invention, the number of parts is increased. As a matter of course, a slight design change in the spring seat 5 and the casing member 1 is sufficient, and an unnecessarily high product cost can be avoided.
[0036]
By the way, from the above, it becomes possible to prevent the rotational force when one end of the biasing spring 4 rotates from being propagated to the adjuster 2 mainly by the modification in the spring seat 5. It becomes possible to prevent the rotation of the adjuster 2 more reliably by devising.
[0037]
Incidentally, in the places shown in FIG. 4 and FIG. 5, where the configuration is the same as that described above, the same reference numerals are given in the drawings, and the detailed explanation is omitted unless necessary. .
[0038]
First, as shown in FIG. 4, the adjuster 2 integrally holds a connecting body 6 formed separately, and the base end portion 6 a of the connecting body 6 can be rotated into the body portion 2 b. The distal end portion 6b of the connecting body 6 that is held and protrudes from the base end portion 6a is assumed to be present inside the biasing spring 4.
[0039]
And the front-end | tip part 6b in the connection body 6 shall be formed by deform | transforming into the spring sheet 5, and the spring sheet 5 has a pair of locking piece part 5b as shown to FIG. 5 (A) at this time. Needless to say, the center guide hole 5a has a deformed portion 5c.
[0040]
On the other hand, as shown in FIG. 5 (B), the front end portion 6b of the connecting body 6 has a deformed surface 6c that matches the deformed portion 5c, and the deformed surface 6c is the deformed portion. By being inserted through 5c, the rotation of the connecting body 6, that is, the rotation along the rotation direction of the adjuster 2 is prevented.
[0041]
From the above, when the connecting body 6 is integrally connected to the body portion 2b of the adjuster 2, the rotation prevention of the adjuster 2 by the spring seat 5 is reliably ensured.
[0042]
Therefore, as shown in the figure, the base end portion 6a of the connecting body 6 is connected to the body portion 2b of the adjuster 2 under the detent mechanism, and at this time, the base end portion 6a is opened to the through-hole. 6d (see FIG. 5B) has a steel ball B urged by a spring S, and the steel ball B is formed in a notch groove 2f formed on the so-called inner periphery of the body 2b of the adjuster 2. It is supposed to fit in.
[0043]
Therefore, in the case of this embodiment, since the connecting body 6 is integrally held by the adjuster 2 under the detent mechanism, as long as the steel ball B is positioned in the notch groove 2f, the connecting body 6 is used. And the adjuster 2 can be ensured, and the rotation of the adjuster 2 can be realized stepwise by moving the steel ball B to the selected notch groove 2f.
[0044]
In the above description, the case where the rotation preventing structure of the adjuster according to the present invention is embodied in the damping force generating portion A in the hydraulic shock absorber has been described as an example. As in the case disclosed in Patent Document 1, it may be embodied in a spring force adjustment structure in a suspension spring that is a coil spring built in the front fork. In this case, one end of the suspension spring is locked. Of course, the rotation of the adjuster will be prevented.
[0045]
【The invention's effect】
As described above, in the first aspect of the present invention, even if one end of the expanding and contracting coil spring rotates, the rotational force at that time is blocked by the spring sheet and is not transmitted to the adjuster, thereby preventing the adjuster from rotating. It will be.
[0046]
In the second aspect of the invention, the tip of the coupling body held by the adjuster is linked to the state in which the rotation is prevented by the spring seat that is maintained in the state in which the rotation is prevented with respect to the casing member. Thus, the rotation of the adjuster is accurately prevented.
[0047]
At this time, in the invention of claim 3, since the base end portion of the connecting body is connected to the body portion of the adjuster under the detent mechanism, the integrity between the connecting body and the adjuster can be ensured. At the same time, the rotation of the adjuster can be realized in stages.
[0048]
As a result, according to the present invention, for example, there is an advantage that it can be embodied in a damping force generation mechanism or a spring force adjustment mechanism in a hydraulic shock absorber, and is optimal for expecting improvement in versatility.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a hydraulic shock absorber having a damping force generation mechanism that embodies an adjuster detent structure according to the present invention.
2 is an enlarged cross-sectional view of a damping force generation mechanism portion in FIG. 1. FIG.
FIG. 3 is a view showing a spring seat in FIG. 2;
FIG. 4 is a cross-sectional view illustrating a damping force generation mechanism in an assembled state according to another embodiment.
5 is a perspective view showing the spring seat in FIG. 4 and a coupling body that is deformed and fitted to the spring seat. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing member 1a, 6b Tip part 1b, 1e, 2c, D2 Screw 1c, 6a Base end part 1d Stopper part 1f Guide groove 2 Adjuster 2a Operation part 2b Trunk part 2d Protruding part 2e, 6c Deformed surface 2f Notch groove 3 Attenuation Part 3a Valve seat member 3b Pressure side damping valve 3c Check valve 4 Energizing spring 5 as a coil spring Spring seat 5a Guide hole 5b Locking piece part 5c Deformed part 6 Connection body 6d Through hole A Damping force generating mechanism B Steel ball D Buffer body D1 Mounting part S Spring T Tank T1 Connecting part

Claims (3)

In the non-rotating structure of the adjuster, which is rotated by manual operation and protrudes and retracts and the coil spring is brought into contact with the tip via a spring seat, the spring seat prevents the adjuster from rotating in the rotation direction with respect to the casing member on which the adjuster is screwed. The adjuster has a non-rotating structure that is connected to the coil spring so as to be movable in the expansion / contraction direction of the coil spring. 2. A connecting body in which a base end portion is rotatably held in a body portion of an adjuster, and a distal end portion of the connecting body that is present inside a coil spring is fitted into a spring seat in an irregular shape. Non-rotating structure for adjuster as described in 3. The anti-rotor structure for an adjuster according to claim 2, wherein a base end portion of the coupling body is connected to a barrel portion of the adjuster under a detent mechanism.

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