Double-barrel type hydraulic shock absorber

Abstract

The invention discloses a double-barrel type hydraulic shock absorber. The double-barrel type hydraulic shock absorber comprises an inner cylinder barrel and an outer cylinder barrel, the lower ends of the inner cylinder barrel and the outer cylinder barrel are closed end walls, the upper end of the inner cylinder barrel is a barrel opening, the upper end of the outer cylinder barrel is an annular end wall, the inner cylinder barrel is coaxially arranged in the outer cylinder barrel, and the barrel opening in the upper end of the inner cylinder barrel is connected to an annular hole in the annular end wall at the upper end of the outer cylinder barrel. An annular partition plate is fixedly arranged in the outer cylinder barrel and divides the interior of the outer cylinder barrel into an upper section pressure relief area and a lower section working area. A first piston is coaxially installed in the inner cylinder barrel in a sliding mode, a first one-way pressure valve and a second one-way pressure valve are installed on the closed end wall of the lower end of the inner cylinder barrel, and a third one-way pressure valve and a fourth one-way pressure valve are installed at the position, above the first piston, of the side wall of the inner cylinder barrel. A second piston is coaxially installed in the working area of the outer cylinder barrel in a sliding mode, and the annular partition plate is provided with a fifth one-way pressure valve and a sixth one-way pressure valve. The service life can be prolonged, and the damping vibration attenuation capacity can be improved.

Description

technical field [0001] The invention relates to the field of automobile cylinder shock absorbers, in particular to a double cylinder hydraulic shock absorber. Background technique [0002] The cylinder shock absorber is used for suspension shock absorption in automobiles. It generally includes a vertical cylinder with a pressure relief cylinder at the bottom of the cylinder. The cylinder is filled with a hydraulic medium, and a piston is slidingly installed in the cylinder. The connected piston rod passes through the upper end of the cylinder and connects to the body. The piston is equipped with a circulation valve and an expansion valve. The lower end of the cylinder between the cylinder and the pressure relief cylinder is equipped with a compression valve, a compensation valve, a circulation valve and an expansion valve. , compression valve and compensation valve are all one-way pressure valves. The piston divides the cylinder into upper and lower areas. When the piston m...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a double-tube hydraulic shock absorber to solve the problems caused by the need to install a flow valve and an extension valve on the piston in the prior art barrel-type shock absorber

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