JPH0319629Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a damping force adjustable hydraulic shock absorber, and in particular, a damping force adjusting actuator can be attached and removed with a single touch to a bracket fixed to the protruding end of a piston rod. The present invention relates to a damping force adjustable hydraulic shock absorber.

[Prior art]

In general, a piston rod protruding from a cylinder, a cushion member provided on the protruding end in order to attach the protruding end of the piston rod to a vehicle body, and a cushion member to be fixed to the upper surface side of the cushion member.
A damping force adjustable hydraulic shock absorber comprising a bottomed cylindrical bracket fastened to the protruding end of the piston rod with a nut, and a damping force adjusting actuator screwed to the opening side of the bracket via a plate. The vessel is known. (For example, Utsukai 59
-Refer to Publication No. 110212).

In this type of hydraulic shock absorber, the protruding end of the piston rod is first inserted into a hole in the vehicle body to protrude, a cushion member or a bracket is inserted into this protruding end, and a nut is tightened onto the protruding end from above. As the piston rod is pushed in, the piston rod is fixed to the vehicle body and the bracket is fixed, and the damping force adjusting actuator is screwed to the opening side of the bracket via the plate.

[Problem that the invention attempts to solve]

However, in the prior art, the bracket is formed into a cylindrical shape with a bottom, and in order to tighten the nut on the bottom of the bracket, a tool must be inserted from the opening side of the bracket and the nut must be rotated. However, there is a disadvantage that the nut tightening work becomes difficult. Furthermore, in order to attach the damping force adjustment actuator to the bracket, it is necessary to screw the damping force adjustment actuator in two to four places on the opening side of the bracket via a plate, which requires a lot of screw tightening work. The drawback is that it is time consuming and the workability is poor. On the other hand, when removing the damping force adjustment actuator, there is a drawback that it takes time and effort to remove the screws.

The present invention was developed in view of the above-mentioned shortcomings of the prior art.In order to fix the protruding end of the piston rod to the vehicle body, a tool can be inserted from the side of the bracket to rotate the nut, making the nut tightening work easier. To provide a damping force adjustable hydraulic shock absorber in which a damping force adjusting actuator can be easily attached to and detached from a bracket with one touch.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention
In order to attach the piston rod protruding from the cylinder and the protruding end of the piston rod to the body of the vehicle, a cushion member provided on the protruding end and a cushion member provided on the upper surface side of the cushion member so as to face each other in the radial direction. a bracket having a pair of arms bent inwardly; a nut screwed onto the protruding end of the piston rod to fasten the cushion member through the bracket; and a nut that is removable when positioned on the bracket. a retainer attached to the retainer; and a damping force adjustment actuator attached to the retainer, the retainer including:
a pair of claws that engage with each arm of the bracket when the retainer is attached to the bracket; and a pair of claws that apply a pressing force in the direction of disengaging the respective claws when removing the retainer from the bracket. A configuration in which a pair of outward protrusions are provided is adopted.

[Effect]

With this configuration, in order to install the retainer with the damping force adjustment actuator positioned with respect to the bracket, the pair of claws provided on the retainer must be connected to the pair of arms provided on the bracket. It is only necessary to engage it by pressing the button. On the other hand, in order to remove the retainer together with the damping force adjustment actuator, press the pair of outward protrusions in the direction that releases the engagement of each claw, and release the engagement between each claw and the arm. Bye.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 9.

In the figure, reference numeral 1 denotes a piston rod with one end protruding from a cylinder (not shown), and the protruding end 1A of the piston rod 1 includes a shoulder portion 1B, a small diameter portion 1C extending upward from the shoulder portion 1B, and a small diameter portion 1C extending upward from the shoulder portion 1B. A male thread 1D formed on the tip side of the male thread 1D, and a chamfered portion 1E located on one side of the male thread 1D and formed at the upper end of the small diameter portion 1C so as to prevent a bracket 8, which will be described later, from rotating. It is being

Reference numeral 2 denotes a cap that is fitted into the small diameter portion 1c of the piston rod 1 by means such as press fitting and fixed on the shoulder portion 1B.An outer cylinder 3 is fixed to the cap 2 by means such as welding. The cylinder 3 covers the piston rod 1 and the cylinder to protect the piston rod 1 and the cylinder. 4 is a washer fitted in the small diameter portion 1C like the cap 2, 5 is a cushion member inserted through the small diameter portion 1C and placed on the washer 4, and the cushion member 5 is inserted through the insertion hole 6A. The small diameter portion 1C is located below the body 6 of the vehicle through which it is inserted, and is configured to sandwich the body 6 together with a cushion member 7, which will be described later. Reference numeral 7 denotes a cushion member disposed on the body 6 and inserted into the small diameter portion 1C projecting upward from the insertion hole 6A of the body 6.

Reference numeral 8 denotes a bracket located on the upper surface side of the cushion member 7 and fitted into the chamfered portion 1E of the piston rod 1;
A holding part 8A formed in a concave curved shape to hold the upper surface side, and a pair of arms protruding outward from radially opposing ends of the holding part 8A and bent in a U-shape. 8B, and each arm part 8B.
The tips extend radially inward above the holding part 8A and face each other at a predetermined distance, thereby creating a wide space around the holding part 8A for inserting a tool, as shown in FIG. It is formed as shown in . Further, notches 8C, 8C are provided in the center of the tip of each arm portion 8B in the radial direction, and an outwardly protruding portion 11B of the retainer 10, which will be described later, is arranged in each of the notches 8c. There is. And each notch 8C
The ends located on both sides of each claw part 1 of the retainer 10
There are locking portions 8D, 8D, . . . that lock onto 1A. On the other hand, a substantially D-shaped fitting hole 8E is formed in the center of the holding portion 8A, and the bracket 8 is prevented from rotating by fitting the fitting hole 8E with the chamfered portion 1E of the piston rod 1. It's summery.

9 connects the piston rod 1 through the bracket 8.
The nut 9 is screwed onto the male thread 1D of the bracket 8, and the nut 9 is rotated by a tool such as a wrench inserted from the side of the bracket 8, and the nut 9 is rotated by a tool such as a spanner, and the nut 9 is rotated by a tool such as a spanner inserted from the side of the bracket 8.
It is fastened on top. Then, by tightening the nut 9, the cushion members 5 and 7 are pressed against the body 6 between the shoulder portion 1B of the piston rod 1 and the nut 9 via the washer 4 and the bracket 8. The protruding end 1A of the piston rod 1 is fixed to the body 6 by sandwiching the body 6 therebetween.

10 is a damping force adjustment actuator 14, which will be described later.
The retainer 10 includes a retainer body 10A formed in a cylindrical shape with a bottom, and a flange portion located on the bottom side of the retainer body 10A and extending outward in the radial direction. 10B and 10B (see FIGS. 2 and 3), a spring accommodating portion 10C is provided inside the retainer body 10A, and a leaf spring 12, which will be described later, is locked on the upper side of the spring accommodating portion 10C. Locking groove 1 for
0D is formed in a ring shape. A through hole 10E is bored inside the locking groove 10D, through which an output shaft 14A, which will be described later, is inserted. Further, on the outer periphery of the retainer body 10A, a pair of fitting grooves 10 are provided at positions shifted by 90 degrees from each of the flange portions 10B.
F, 10F are provided in the axial direction, and each fitting groove 10
A pair of claw foot parts 11, 11 extending in the axial direction are formed between F and the spring accommodating part 10C.

On both sides of the lower end of each of the claw foot parts 11, substantially right triangular claw parts 11A, 11A, which are engaged with the respective locking parts 8D of the bracket 8, are provided to protrude in the radial direction. Between each of the claws 11A are provided outward protrusions 11B, 11B which are bent in a substantially dogleg shape and protrude outward.
The lower end side of B is inclined at a predetermined angle so as to engage with each notch 8C of the bracket 8.

Thus, in order to engage the retainer 10 with each arm 8B of the bracket 8, each fitting groove 10F of the retainer 10 is aligned with the position of each arm 8B, and the retainer 10 is pressed downward. For example, each claw foot portion 11 is guided by the lower inclined surface 11C and is displaced radially inward by each arm portion 8B, so that each claw portion 11A of each claw foot portion 11 is The retainer 10 is automatically locked with each locking portion 8D of the arm portion 8B, and the retainer 10 is positioned by the bracket 8 in the axial direction and rotational direction. At this time, each of the outward protrusions 11B is engaged with a notch 8C at the tip of each arm 8B, and when removing the retainer 10 from the bracket 8, each outward protrusion 11B must be pressed downward. In this case, the retainer 10 can be easily removed.

Next, 12 is a spring housing portion 10C of the retainer 10.
Each claw foot portion 11 of the retainer 10 is disposed within the retainer 10.
The plate spring 12 is formed in a substantially U-shape, and has a hole 12A in the center of the upper end. The hole 12
A has protrusions 12B, 12B, . . . that protrude inward in the radial direction and are bent downward at an acute angle.
For example, six square projections 12B are provided at equal intervals, and the plate spring 12 is locked in the locking groove 10D. On both sides of the leaf spring 12, legs 12C, 1 extending outwardly are provided.
2C, and each leg 12C presses each claw foot 11 of the retainer 10 radially outward to restrict inward displacement. On the other hand, 13 is a coil spring whose one end side engages with each protrusion 12B of the leaf spring 12 and is integrated with the leaf spring 12B into the spring accommodating portion 10C of the retainer 10. Holding portion 8A of the bracket 8 on the end side
and press the retainer 10 against the bracket 8.
It is designed to bias the force upward.

Furthermore, 14 is a damping force adjustment actuator (hereinafter abbreviated as actuator) placed on the retainer 10 and fixed to each flange portion 10B of the retainer 10 with repets or screws 15, 15. 14 output shafts 14
A protrudes downward through the through hole 10E of the retainer 10, and is inserted into the insertion hole 1F bored in the axial direction of the piston rod 1.
The output shaft 14A is removably connected to the tip of the damping force adjustment rod 16. 17 is a bottom plate fixed to the lower surface of the actuator 14 via claw pieces 17A, 17A, . . . .

The damping force adjustable hydraulic shock absorber configured as described above rotates the output shaft 14A using the actuator 14, and rotates the valve (not shown) provided in the cylinder via the damping force adjusting rod 16. By doing so, the damping force is adjusted.

By the way, when assembling the shock absorber, in order to attach the actuator 14 to the bracket 8 fixed to the piston rod 1, first fix the actuator 14 to the retainer 10 with screws 15, etc.
A leaf spring 1 is installed in the spring accommodating portion 10C of the retainer 10.
2 and coil spring 13 are assembled, (second
(see figure), by aligning each fitting groove 10F of the retainer 10 and each arm part 8B of the bracket 8, and pressing the retainer 10, actuator 14, etc. downward integrally, each claw foot part Each of the claw portions 11A of 11 automatically locks with each locking portion 8D of each arm portion 8B, making it possible to easily attach the actuator 14 to the bracket 8 via the retainer 10 as shown in FIG. The actuator 14 can be positioned in the rotational direction and the axial direction with a single touch operation. In this state, the leaf spring 12
Each leg 12C of the retainer 10 has a claw foot 11 of the retainer 10.
Actuator 1 is pressed outward, so actuator 1
Even if an external force acts on the bracket 8 from the side, each claw foot 11 can be prevented from displacing inward in the radial direction, and each claw foot 11 can be prevented from being separated from each arm 8B of the bracket 8. You can definitely prevent it from coming off accidentally.

On the other hand, when the actuator 14 is removed from the bracket 8 in order to replace the hydraulic shock absorber main body, etc., by pressing each outward protruding part 11B of the retainer 10 downward, a large bending moment can be applied, and each of the claw parts 11A and each of the locking portions 8D can be easily released, and the actuator 14 can be easily removed from the bracket 8 together with the retainer 10. When removing the nut 9, just insert a tool from the side through the space between the arms 8B of the bracket 8 and rotate the nut 9 in the direction of loosening, as in the case of assembly. It can be removed and the hydraulic shock absorber body can be easily replaced.

Therefore, according to this embodiment, the work of tightening the nut 9 and the work of attaching the actuator 14 to the bracket 8 can be greatly simplified, and the situation where the actuator 14 accidentally comes off from the bracket 8 can be avoided by using the leaf spring. 12, this can be reliably prevented.
Further, since one end of the coil spring 13 is engaged with each protrusion 12B of the leaf spring 12, and each protrusion 12B is engaged with the locking groove 10D of the retainer 10, the leaf spring 12 and The coil spring 13 can be integrally assembled into the spring accommodating portion 10C of the retainer 10, and it is possible to reliably prevent the coil spring 13 from falling off or forgetting to assemble the coil spring 13 during assembly. Furthermore, when replacing the shock absorber body, the actuator 14, nut 9, etc. can be easily removed, greatly improving work efficiency.

[Effect of idea]

As detailed above, according to the present invention, a bracket having a pair of inwardly bent arms facing each other in the radial direction is fastened to the protruding end of the piston rod with a nut, and the bracket is attached to the protruding end of the piston rod. When attaching a retainer, a pair of claws provided on the retainer are engaged with the arms of the bracket to determine the position, while when removing the retainer from the bracket, a pair of outward protrusions provided on the retainer engage each claw. Since the structure is configured to apply a pressing force in the direction of disengaging the nut, when tightening or loosening the nut, it is only necessary to insert a tool through the space formed between the arms of the bracket and screw the nut. In addition to simplifying the tightening work, when attaching the retainer to the bracket, it is only necessary to engage the claws of the retainer with each arm of the retainer. When removing the retainer, it is only necessary to press the outward protrusion to release the engagement between each arm and the claw, and the workability of attaching and detaching the damping force adjusting actuator can be greatly improved.

[Brief explanation of the drawing]

1 to 9 show embodiments of the present invention,
Fig. 1 is a vertical sectional view showing the main parts of the shock absorber, Fig. 2 is a side view showing the retainer and actuator in Fig. 1, Fig. 3 is a plan view of the retainer shown in Fig. 2, Fig. 4 is a sectional view in the direction of the arrow in Fig. 3,
5 is a front view of the leaf spring shown in FIG. 1, FIG. 6 is a bottom view of the leaf spring shown in FIG. 5, and FIG. 7 is an enlarged perspective view of the main parts in FIG. FIG. 8 is a sectional view similar to FIG. 4, showing a state in which a leaf spring and a coil spring are assembled into the retainer, and FIG. 9 is a perspective view of the bracket shown in FIG. 1. 1...Piston rod, 1A...Protruding end, 4,
7...Cushion member, 6...Body, 8...Bracket, 8B...Arm, 8C...Notch, 8D
...Locking part, 9...Nut, 10...Retainer,
11...Claw foot part, 11A...Claw part, 11B...
Outward protrusion, 12... leaf spring, 14... damping force adjustment actuator.

Claims (1)

[Scope of utility model registration request] a piston rod protruding from the cylinder; a cushion member provided on the protruding end for attaching the protruding end of the piston rod to the body of the vehicle;
a bracket disposed on the upper surface side of the cushion member and having a pair of arms bent inward so as to face each other in the radial direction; and a piston rod for fastening the cushion member through the bracket. The retainer includes a nut screwed onto the protruding end, a retainer removably attached to the bracket in a positioned state, and a damping force adjustment actuator attached to the retainer, a pair of claws that engage with each arm of the bracket when attaching the retainer; and a pair of outward protrusions that apply a pressing force in a direction to release the engagement of the claws when removing the retainer from the bracket. A damping force adjustable hydraulic shock absorber.