Bidirectional hydraulic damping device

Abstract

The invention relates to a bidirectional hydraulic damping device 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, the piston provided with a center hole is fixed to one end of the piston rod reciprocating in the axial direction of an inner cavity of the cylinder body, and 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 sleeved on an annular groove of the piston and divides an inner cavity of the cylinder body into an upper cavity and a lower cavity; the shaft end, positioned in the cylinder body, of the piston rod penetrates through a central hole of the piston and is in clearance fit with the central hole; when the piston rod extends out, liquid in the upper cavity enters the lower cavity through the through hole and a gap between the piston rod and the piston, and damping is provided for extension of the piston rod. When the piston rod retracts, liquid in the lower cavity enters the upper cavity through the gap between the piston rod and the piston and the through hole, and damping is provided for retraction of the piston rod. The mechanism is simple and reliable, and when the mechanism is applied to a mechanical device, damping can be effectively provided for mechanical movement for buffering.

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 the overflow hole arranged on the piston rod for damping and buffering. The small-sized overflow hole is difficult to process and the cost is high. During the use of the damping device, the impurities in the hydraulic oil are easy to block the overflow hole. The oil circuit is not smooth, resulting in unstable damping force. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a bidirectional hydraulic damping device in order to solve the above problems. For achieving the above object, the present invention provides the following technical solutions: [0004] A bidirectional hydraulic damping device, comprising: a cylinder body, a piston rod, a piston, a positioning ring, a mouth sealing ring, a chamber sealing ring, a g...

AI Technical Summary

Problems solved by technology

[0002] The existing hydraulic damping device uses the overflow hole on the piston rod for damping and buffering. The small overflow hole is difficult to process and the cost is high. During the use of the damping device, impurities in the hydraulic oil are easy to block the overflow hole. The oil passage is not smooth, resulting in unstable damping force

Images