JPS6213250U

JPS6213250U -

Info

Publication number: JPS6213250U
Application number: JP10432385U
Authority: JP
Priority date: 1985-07-09
Filing date: 1985-07-09
Publication date: 1987-01-27
Also published as: JPH0318757Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す油圧緩衝器の
部分正面断面図、第２図はシリンダ内下端部のス
トツパの他の実施例を示す部分断面図、第３図は
従来の油圧緩衝器を示す部分正面断面図である。１１……シリンダ、１２……ピストンロツド、
１３……ピストン部、１４……伸側遮断バルブ、
１５……圧側遮断バルブ、１６……減衰バルブ、
１７，１７′……ストツパ、Ａ……上方油室、Ｂ
……下方油室、Ｌ……側路、Ｑ……アキユムレー
タ。 Fig. 1 is a partial front sectional view of a hydraulic shock absorber showing one embodiment of the present invention, Fig. 2 is a partial sectional view showing another embodiment of a stopper at the lower end of the cylinder, and Fig. 3 is a conventional hydraulic shock absorber. It is a partial front sectional view showing a container. 11...Cylinder, 12...Piston rod,
13...Piston part, 14...Extension side shutoff valve,
15...Pressure side cutoff valve, 16...Dampening valve,
17, 17'...Stopper, A...Upper oil chamber, B
...Lower oil chamber, L...side passage, Q...accumulator.

Claims

[Claims for Utility Model Registration] (1) The piston section that divides the inside of the cylinder into an upper oil chamber and a lower oil chamber is formed so as to enable the oil lock inside the cylinder at the time of maximum expansion and contraction while sliding inside the cylinder. In the oil lock structure of the hydraulic shock absorber, the cylinder has a side passage that allows communication between the upper oil chamber and the lower oil chamber, and the opening on the upper oil chamber side of the side passage has an upper end inside the cylinder when the cylinder is fully extended. An extension-side shutoff valve is provided adjacent to the side passageway to allow the opening on the upper oil chamber side to be closed, and the opening on the lower oil chamber side of the side passage is provided with an expansion side shutoff valve that is in contact with the upper oil chamber side opening. 1. An oil lock structure for a hydraulic shock absorber, characterized in that a pressure side shutoff valve is provided adjacent to the pressure side shutoff valve that is brought into contact with the valve to close the opening on the lower oil chamber side. (2) A damping valve that generates a desired damping force when the piston inside the cylinder slides is disposed outside the cylinder, and the damping valve communicates with an accumulator outside the cylinder and a side passage inside the cylinder. An oil lock structure for a hydraulic shock absorber as set forth in claim 1 of the utility model registration claim. (3) An oil lock structure for a hydraulic shock absorber according to claim 1, wherein a side passage is formed in a piston portion in a cylinder and a piston rod having the piston portion at its lower end. (4) An oil lock structure for a hydraulic shock absorber as set forth in claim 1 of the utility model registration, in which a rebound-side shutoff valve is interposed in a piston rod. (5) The oil lock structure for a hydraulic shock absorber according to claim 1, wherein the pressure side shutoff valve is interposed in a piston nut that fixes the piston body to the lower end spigot part of the piston rod. (6) The oil lock structure for a hydraulic shock absorber according to claim 1, wherein a stopper is provided on the lower end side of the cylinder to allow a pressure-side shutoff valve to come into contact with the stopper.