Bidirectional hydraulic damping device with adjustable damping force

Abstract

The invention relates to a two-way hydraulic damping device with adjustable damping force, which comprises a cylinder body, a piston rod, a piston, a positioning ring, an opening sealing ring, a cavity sealing ring, a guide sleeve and liquid, a through hole penetrating through the outer cylindrical surface and the center hole is formed in the outer cylindrical surface of the piston, the cavity sealing ring is arranged on an annular groove of the piston in a sleeving mode and divides an inner cavity of the cylinder body into an upper cavity and a lower cavity, and the conical section, located at the shaft end in the cylinder body, of the piston rod penetrates through the center hole of the piston and is in clearance fit with the center hole. The end, opposite to the positioning ring, of the piston is in a concave-convex shape, when the piston rod completely stretches out, the piston is meshed with the concave-convex shape of the positioning ring, the piston rod can move in the axial direction of the cylinder body when the piston rod is rotated, and therefore the fit clearance between the piston rod and the piston can be adjusted, and damping force can be adjusted. The mechanism is simple and reliable, and the damping force can be adjusted according to the load when the mechanism is applied to a mechanical device.

Description

technical field [0001] The invention relates to the field of machinery, in particular to a hydraulic damping device for buffering a moving mechanism. Background technique [0002] The existing hydraulic damping device uses a fixed-size overflow hole set on the piston rod to provide a fixed damping force. The size of the overflow hole diameter determines the size of the damping force, and the damping force cannot be adjusted. When the load changes, the corresponding specifications need to be selected. The overflow hole leads to an increase in the cost of use. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a two-way hydraulic damping device with adjustable damping force in order to solve the above problems. For achieving the above object, the present invention provides the following technical solutions: [0004] A two-way hydraulic damping device with adjustable damping force, comprising: a cylinder body, a piston rod, a piston, a posi...

AI Technical Summary

Problems solved by technology

[0002] The existing hydraulic damping device uses a fixed size overflow hole on the piston rod to provide a fixed damping force. The size of the overflow hole determines the size of the damping force. The damping force cannot be adjusted. When the load changes, it is necessary to select the corresponding specification. The overflow hole, resulting in an increase in the cost of use

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