JP2013199976A - Spring load adjusting device of hydraulic shock absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent intrusion of refuse into an upper end opening part of a cylindrical body engaging from the lower side in the axial direction with an adjuster on the outer periphery of a cylinder, and improve the appearance of the cylinder, in a spring load adjusting device of a hydraulic shock absorber for enabling an upper spring receiver to be vertically movable by driving the cylindrical body to the adjuster.SOLUTION: A spring load adjusting device 30 of a hydraulic shock absorber 10 is provided for enabling an upper spring receiver 16 to be vertically movable by driving a cylindrical body 40 to an adjuster 32, and formed so that the cylindrical body 40 fits a cover member 50 to the upper end opening part 46 for surrounding the outer periphery of the cylinder 11.

Description

  The present invention relates to a spring load adjusting device for a hydraulic shock absorber.

  In the hydraulic shock absorber, as described in Patent Document 1, an upper spring support provided on the cylinder side and a lower spring support provided on the piston rod side slidably inserted into the cylinder are interposed. Some have a spring load adjustment device for the spring.

  This spring load adjusting device has an adjuster with a female thread that is screwed into a male thread portion provided on the outer periphery of a cylinder, and an upper spring receiver is provided at the lower portion of the adjuster. The upper spring receiver is moved up and down by screwing the adjuster with respect to the external thread portion of the cylinder, thereby adjusting the spring load.

JP2003-278817

  In a conventional spring load adjusting device for a hydraulic shock absorber, a stopper for the adjuster is provided on the upper side of the external thread portion of the cylinder. The stopper has a diameter larger than the male thread diameter of the male thread portion, and regulates the screwing stroke of the adjuster.

  For this reason, the inner diameter (female thread diameter) of the adjuster is smaller than that of the stopper on the outer periphery of the cylinder, and the adjuster can only be screwed into the male threaded portion with stopper on the outer periphery of the cylinder from below in the axial direction.

  At this time, the upper end opening of the adjuster opens toward the upper side in the axial direction, and a gap is formed between the outer periphery of the cylinder. There is a possibility that dust entering the upper end opening of the adjuster may get caught in the screw portion and cause malfunction.

  Moreover, the external thread part of the outer periphery of the cylinder is exposed to the outside, and the appearance of the cylinder is impaired.

  An object of the present invention is to provide a spring load adjusting device for a hydraulic shock absorber in which an upper spring receiver can be moved up and down by driving a cylindrical body with respect to an adjuster. In addition to preventing dust from entering the upper end opening of the cylindrical body engaged from the side, the appearance of the cylinder is improved.

  The invention according to claim 1 is a hydraulic pressure in which a spring is interposed between an upper spring support provided on the cylinder side and a lower spring support provided on the piston rod side slidably inserted into the cylinder. In a spring load adjusting device for a shock absorber, an adjuster provided on the outer periphery of the cylinder, and a cylinder that engages with the adjuster on the outer periphery of the cylinder from the lower side in the axial direction and is provided around the cylinder and provided with an upper spring support A spring load adjusting device for a hydraulic shock absorber that is capable of moving the upper spring receiver up and down by driving the cylindrical body relative to the adjuster. A lid member is attached to the surrounding upper end opening.

  According to a second aspect of the present invention, in the first aspect of the present invention, the spring load display portion defined on the lid member can be collated with a spring load display scale provided on the outer periphery of the cylinder. .

(Claim 1)
(a) A cylindrical body provided around the cylinder engages with an adjuster on the outer periphery of the cylinder from the lower side in the axial direction, and a lid member is engaged with an upper end opening surrounding the outer periphery of the cylinder. Accordingly, the lid member prevents dust from entering the upper end opening of the cylindrical body, avoids dust from being caught in the adjuster, and improves the operability of the spring load adjusting device.

  (b) The cylindrical body and the lid member can cover the adjuster on the outer periphery of the cylinder and prevent the adjuster from being exposed to the outside, thereby improving the appearance of the cylinder.

(Claim 2)
(c) The spring load display portion defined on the lid member can be collated with a spring load display scale provided on the outer periphery of the cylinder. The position of the cover member and the cylindrical body on the outer periphery of the cylinder, and thus the set load of the spring supported by the upper spring can be visually confirmed by the spring load display scale of the cylinder indicated by the spring load display portion of the cover member.

FIG. 1 is a partially broken front view showing a hydraulic shock absorber. FIG. 2 is a side view of FIG. FIG. 3 is an enlarged top view of FIG. 4 is an enlarged view of the upper part of FIG.

  As shown in FIGS. 1 and 2, the hydraulic shock absorber 10 has a piston rod 12 inserted into a cylinder 11. The cylinder 11 includes a vehicle body side mounting member 14, and the piston rod 12 includes an axle side mounting member 15. The cylinder 11 is provided with an upper spring receiver 16 that is moved up and down by a spring load adjusting device 30, and the piston rod 12 is fixedly provided with a lower spring receiver 17, and a suspension spring 18 is provided between the upper spring receiver 16 and the lower spring receiver 17. Is intervening.

  The hydraulic shock absorber 10 inserts a piston rod 12 into a cylinder 11 from a rod guide 21 provided in the cylinder 11, and the piston 11 is provided inside the cylinder 11 by a piston 22 provided at an insertion end of the piston rod 12. Is divided into a rod side oil chamber 23A where the piston rod 12 is not present and a piston side oil chamber 23B where the piston rod 12 is not present, and a damping force generator 24 is provided in the connecting oil passage between the oil chamber 23A provided in the piston 22 and the oil chamber 23B. Yes.

  The hydraulic shock absorber 10 absorbs the impact force received from the road surface during traveling of the vehicle by the displacement of the spring 18, and absorbs the expansion and contraction vibration of the spring 18 by the damping force generator 24 provided on the piston 22.

However, the hydraulic shock absorber 10 constitutes the spring load adjusting device 30 as follows.
As shown in FIGS. 3 and 4, the spring load adjusting device 30 has a sleeve 31 inserted into the outer periphery of the cylinder 11 to prevent rotation, and a male screw portion 32 </ b> A serving as an adjuster 32 is provided on the outer periphery of the sleeve 31. The sleeve 31 abuts on the lower end surface of the belt-like collar 33 welded to the outer periphery of the cylinder 11 from below and is fixed in the axial direction. At this time, the collar 33 includes a tongue-like detent portion 33A extending downward from one circumferential direction of the lower end surface (FIG. 4), and the circumferential direction of the upper end surface of the sleeve 31 is provided in the detent portion 33A. A notch groove 31A provided in one place is engaged to prevent the sleeve 31 from rotating.

  A stopper ring 34 is engaged with the outer periphery of the lower end side of the external thread portion 32A of the sleeve 31. The stopper ring 34 regulates the descending end of the cylindrical body 40 to be described in detail.

  The spring load adjustment device 30 includes a female thread portion 41 that is screwed into the external thread portion 32A (adjustment element 32) of the outer periphery of the cylinder 11 from the lower side in the axial direction, and is provided around the cylinder 11 and is provided with an upper spring receiver 16. It has the cylindrical body 40 provided with.

  The spring load adjusting device 30 moves the upper spring receiver 16 up and down by screwing the female screw portion 41 of the cylindrical body 40 with respect to the male screw portion 32A (adjustment member 32) of the sleeve 31, and consequently the spring 18 is moved. The set spring load is adjusted. The cylindrical body 40 is provided with a concave operation groove 42 extending in the axial direction at each of a plurality of locations at regular intervals in the circumferential direction of the outer periphery, and is screwed by an operator's fingers holding the operation groove 42.

  The cylindrical body 40 is screwed into the external thread part 32 </ b> A (adjustment element 32) of the outer periphery of the cylinder 11 and extends to the upper end side of the outer periphery of the cylinder 11 surrounding the external thread part 32 </ b> A and the collar 33. The cylindrical body 40 accommodates a male thread part 32A (adjustment element 32) and a collar 33 on the outer periphery of the cylinder 11 in a hollow part 43 provided on the upper part of the female thread part 41, and the male thread part 32A and the collar 33 are accommodated therein. Is to cover the outside. The tubular body 40 includes a drain hole 44 that communicates the bottom of the hollow portion 43 with the lower end surface of the tubular body 40. Further, the cylindrical body 40 protrudes a downward annular tongue piece 45 around the female screw portion 41 on the inner peripheral side of the lower end surface on which the upper spring receiver 16 is seated, and the end winding portions of the upper spring receiver 16 and the spring 18 are provided. Interference with the male thread 32A of the sleeve 31 is prevented.

  Further, in the spring load adjusting device 30, the lid member 50 is engaged with the upper end opening 46 where the cylindrical body 40 surrounds the outer periphery of the cylinder 11. The lid member 50 is made of resin, and an annular tip claw portion 51 that can be elastically engaged with an annular groove 46A provided on the inner periphery of the upper end opening 46 of the cylindrical body 40 made of metal is formed on the outer periphery of the lower end portion. Prepare. The lid member 50 is configured to fit the groove-shaped outer peripheral portion a near the lower end into the protruding inner peripheral portion b of the upper end portion of the cylindrical body 40 while elastically reducing the diameter of the front end claw portion 51, and then to the distal end of the lower end portion. The claw portion 51 is elastically expanded in diameter and is engaged with the annular groove 46A of the cylindrical body 40. The lid member 50 completely closes the annular gap formed between the upper end opening 46 of the cylindrical body 40 and the outer periphery of the cylinder 11.

  The tubular body 40 and the lid member 50 are dome-like shapes that gradually squeeze the contour of the upper end side of the tubular body 40 to the outer circumference of the lid member 50 upward in the axial direction in the above-described engaged and integrated state. To. Then, the upper end surface of the lid member 50 (the top surface of the dome-shaped outer periphery) itself is defined as the spring load display portion 52, and is arranged at a plurality of positions along the axial direction of the outer periphery of the cylinder 11 (in this embodiment, five positions at equal intervals). This spring load display section 52 can be collated with the provided spring load display scale 53 (53A, 53B...). Each spring load display scale 53 is formed by an annular line engraved over the entire outer periphery of the cylinder 11. The spring load display scale may be a sticker attached to the outer periphery of the cylinder 11.

According to the present embodiment, the following operational effects can be obtained.
(a) The cylindrical body 40 provided around the cylinder 11 is engaged with the external threaded portion 32A (adjuster 32) of the outer periphery of the cylinder 11 from the lower side in the axial direction, and the upper end opening that surrounds the outer periphery of the cylinder 11 A lid member 50 is engaged with 46. As a result, the lid member 50 prevents the entry of dust into the upper end opening 46 of the cylindrical body 40, avoids the entry of dust into the external thread portion 32 </ b> A (adjustment element 32), and the spring load adjusting device 30. Improves operability.

  (b) The cylindrical body 40 and the lid member 50 cover the external thread part 32A (adjustment element 32) of the cylinder 11 and prevent the external thread part 32A (adjustment element 32) from being exposed to the outside. This improves the appearance of the cylinder 11.

  (c) The spring load display portion 52 defined on the lid member 50 can be collated with a spring load display scale 53 provided on the outer periphery of the cylinder 11. By the spring load display scale 53 of the cylinder 11 indicated by the spring load display section 52 of the lid member 50, the positions of the lid member 50 and the cylindrical body 40 on the outer periphery of the cylinder 11, and eventually the set load of the spring 18 supported by the upper spring 16 are determined. Visible.

  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 even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention. For example, in the present invention, the adjuster provided on the outer periphery of the cylinder is formed of a cam stopper, and the cam surface of a cylindrical body provided with an upper spring support provided around the cylinder is engaged with the cam stopper from the lower side in the axial direction. It can also be applied to a spring load adjusting device. The upper spring receiver can be moved up and down by rotating the cam surface of the cylindrical body with respect to the cam stopper as a regulator. The cylindrical body can cover the cam stopper, prevent dust from entering the cam surface, and improve the appearance of the cylinder.

  The present invention relates to a hydraulic shock absorber spring in which a spring is interposed between an upper spring support provided on a cylinder side and a lower spring support provided on a piston rod side slidably inserted into the cylinder. In the load adjusting device, an adjuster provided on the outer periphery of the cylinder, and a cylindrical body that engages with the adjuster on the outer periphery of the cylinder from the lower side in the axial direction and is provided around the cylinder and provided with an upper spring support. A spring load adjusting device for a hydraulic shock absorber that has an upper spring receiver that can move up and down by driving the cylindrical body with respect to the adjuster, wherein the cylindrical body surrounds the outer periphery of the cylinder. A lid member was attached to the lid. As a result, in the spring load adjusting device for a hydraulic shock absorber, in which the upper spring receiver can be moved up and down by driving the cylindrical body with respect to the adjuster, it is possible to engage the adjuster on the outer periphery of the cylinder from the lower side in the axial direction. In addition to preventing dust from entering the upper end opening of the cylindrical body to be joined, the appearance of the cylinder can be improved.

DESCRIPTION OF SYMBOLS 10 Hydraulic buffer 11 Cylinder 12 Piston rod 16 Upper spring receiver 17 Lower spring receiver 18 Suspension spring 30 Spring load adjusting device 32 Adjuster 32A Male thread part 40 Cylindrical body 46 Upper end opening part 50 Lid member 52 Spring load display part 53 Spring Load display scale

Claims (2)

In a spring load adjusting device for a hydraulic shock absorber, wherein a spring is interposed between an upper spring support provided on the cylinder side and a lower spring support provided on a piston rod side slidably inserted into the cylinder. ,
An adjuster provided on the outer periphery of the cylinder;
A cylindrical body that engages with the adjuster on the outer periphery of the cylinder from the lower side in the axial direction and that is provided around the cylinder and includes an upper spring support;
A spring load adjusting device for a hydraulic shock absorber, wherein an upper spring bearing can be moved up and down by driving a cylindrical body with respect to a regulator,
A spring load adjusting device for a hydraulic shock absorber in which a cylindrical member is attached to a top opening that surrounds the outer periphery of a cylinder.   The spring load adjusting device for a hydraulic shock absorber according to claim 1, wherein the spring load display portion defined on the lid member is collated with a spring load display scale provided on the outer periphery of the cylinder.

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