JPH0596582U - Inverted hydraulic shock absorber - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the number of parts of the inverted hydraulic shock absorber. [Structure] An inner tube 2 is slidably inserted into the outer tube 1 from below, a damper cylinder 3 is hung on the outer tube 1, and a lower end is fixed to a cap member 4 attached to a lower end of the inner tube 2. Piston rod 6
Is exposed to the inside of the damper cylinder 3, and a recess 11 into which the outer peripheral portion of the lower end of the damper cylinder 3 fits is formed inside the cap member 4 near the most compressed position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inverted hydraulic shock absorber used for a motorcycle or the like.

[0002]

[Prior Art]

 A conventional inverted type shock absorber used in a motorcycle or the like has a structure in which an inner tube is slidably inserted into the outer tube from below as described in Japanese Utility Model Laid-Open No. 62-162186. The damper cylinder hangs down, the piston rod erected in the lower part of the inner tube is inserted into the damper cylinder, and the piston that slides in contact with the inner surface of the damper cylinder is attached to the tip of this piston rod. An oil lock piece is fixed to the lower end of the piston, and an oil lock collar that fits over the oil lock piece near the most compressed position is attached to the piston rod. By fitting the oil lock collar on the rod, bottoming at the time of maximum compression is prevented.

[0003]

[Problems to be solved by the device]

 However, in the above-described oil lock mechanism of the conventional inverted hydraulic shock absorber, the oil lock is provided by the oil lock piece provided on the damper cylinder and the oil lock collar provided on the piston rod. , The number of parts increases.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has a recess formed in the cap member that is mounted in the lower end of the inner tube and that fixes the piston rod so that the outer periphery of the lower end of the damper cylinder fits near the most compressed position. This cap member supports the lower end of the suspension spring, or the flange part formed on the outer peripheral part is clamped and fixed between the step part of the axle member screwed to the outer peripheral surface of the lower part of the inner tube and the lower end of the inner tube. To be done.

[0005]

[Action]

 An oil lock occurs when the lower end of the damper cylinder fits into the recess of the cap member near the most compressed position of the shock absorber, and the damper cylinder doubles as the oil lock piece and the cap member doubles as the oil lock collar. Is less. In addition, by supporting the lower end of the suspension spring with the cap member, and by further sandwiching the flange portion of the cap member between the stepped portion of the axle member and the lower end portion of the inner tube, the piston rod, the inner tube, and the axle. Since the members can be connected by the cap member, the number of parts can be further reduced, and the assembling becomes easy.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a half cross-sectional view of an inverted hydraulic shock absorber according to the present invention, FIG. 2 is an enlarged cross-sectional view of an essential part of the shock absorber, and FIG. 3 is an enlarged plan sectional view of an essential part of the shock absorber.

An inner tube 2 is slidably inserted into the outer tube 1 from below, a damper cylinder 3 is hung on the outer tube 1, and a lower end is screwed onto a cap member 4 attached to a lower end of the inner tube 2. A piston rod 6 which is attached and fixed by a nut 5 is exposed to the inside of the damper cylinder 3, and a piston 7 slidably contacting the inner peripheral surface of the damper cylinder 3 is fixed to the upper end portion of the piston rod 6.

A recess 11 into which the lower end outer peripheral portion of the damper cylinder 3 fits is formed inside the cap member 4 near the most compressed position, and a notch 12 is formed in the outer peripheral portion of the cap member 4. .. Further, a flange portion 13 is formed on the lower end portion of the outer periphery of the cap member 4, and the flange portion of the cap member 4 is formed between the step portion 14a of the axle member 14 screwed to the outer peripheral surface of the lower end portion of the inner tube 2 and the lower end of the inner tube 2. The part 13 is sandwiched.

Further, a suspension spring 18 is provided between the spring receiver 17 fixed to the lower end of the collar 16 hanging from the upper end of the outer tube 1 and the upper end of the cap member 4, and the suspension spring 18 is provided at the upper end of the cap member 4. The lower end of is supported. As a result, a separate member for receiving the lower end of the suspension spring 18 becomes unnecessary, and the number of parts can be reduced.

In the hydraulic shock absorber having the above-described structure, the pre-compression state shown in FIG. 1 is shifted to the compression stroke, and the damper cylinder 3 is lowered integrally with the outer tube 1 so that the maximum compression is achieved. Since the outer peripheral portion of the lower end of the damper cylinder 3 fits into the recess 11 of the cap member 4 near the position, an oil lock is applied to prevent bottoming.

As described above, by fitting the damper cylinder 3 into the recess 11 of the cap member 4 to generate oil lock, it is not necessary to separately provide an oil lock piece and an oil lock color, and the number of parts can be reduced. ..

Further, after the piston rod 6 is attached to the cap member 4 and attached to the lower end of the inner tube 2, the axle member 14 is screwed to the outer peripheral portion of the lower end of the inner tube 2 so that the piston rod 6, the inner tube 2 and the axle are attached. Since the members 14 can be connected by the cap member 3, the number of parts can be reduced and the assembly is easy.

[0013]

[Effect of the device]

 As explained above, according to the present invention, the cap member, which is mounted in the lower end of the inner tube and fixes the piston rod, is formed with the recessed portion to which the outer peripheral portion of the lower end of the damper cylinder fits near the most compressed position. Since the oil lock is generated between the cylinder and the recess, the number of parts can be reduced. In addition, the lower end of the suspension spring is supported by the cap member, and the flange portion of the cap member is further sandwiched between the stepped portion of the axle member and the lower end portion of the inner tube, so that the piston rod, the inner tube, and the axle member. Caps can be connected by a cap member, and the number of parts can be further reduced, and assembly is also easy.

[Brief description of drawings]

FIG. 1 is a half sectional view of an inverted hydraulic shock absorber according to the present invention.

FIG. 2 is an enlarged sectional view of the main part of the shock absorber.

FIG. 3 is an enlarged plan sectional view of an essential part of the shock absorber.

[Explanation of symbols]

1 ... Outer tube, 2 ... Inner tube, 3 ... Damper cylinder, 4 ... Cap member, 6 ... Piston rod, 7
... piston, 11 ... recessed part, 13 ... flange part, 14 ... axle member, 18 ... suspension spring.

Claims (3)

[Scope of utility model registration request] 1. An inner tube is slidably fitted into the outer tube from below, a damper cylinder is hung in the outer tube, and a piston rod erected at a lower portion inside the inner tube is installed in the damper cylinder. In the inverted hydraulic shock absorber inserted, a recess is formed in a cap member that is mounted in the lower end of the inner tube and that fixes the piston rod so that the outer peripheral end of the lower end of the damper cylinder fits near the most compressed position. Inverted hydraulic shock absorber. 2. The inverted hydraulic shock absorber according to claim 1, wherein the cap member supports a lower end portion of a suspension spring. 3. A flange portion is formed on the outer periphery of the lower end portion of the cap member, and the flange portion of the cap member is provided between the stepped portion of the axle member screwed to the outer peripheral surface of the lower end portion of the inner tube and the lower end of the inner tube. The inverted hydraulic shock absorber according to claim 1, wherein the inverted hydraulic shock absorber is sandwiched between the two.