Hydraulic damping device

Abstract

The invention discloses a hydraulic damping device. In a working process, pressure is applied to a front fork pipe, the front fork pipe moves backward, and a damping spring is compressed; damping oil in a cavity enters a pipe cavity through an oil guide port; when the pressure of oil is too large, the oil enters supporting seats, and sequentially impacts a second supporting seat and a first supporting seat; a gap between the second supporting seat and a positioning pipe and a gap between the first supporting seat and the positioning pipe are matched to form a secondary buffer structure, so the impact force of the damping oil is reduced gradually, and noised caused by impacting relative structures such as the supporting seats and the like in the flowing process of the damping oil can be effectively avoided; and therefore, the noise produced in the using process of the hydraulic damping device can be reduced effectively.

Description

technical field [0001] The invention relates to the technical field of motor vehicle shock absorbing accessories, in particular to a hydraulic shock absorbing device. Background technique [0002] During the production and use of general motor vehicles, shock absorbing devices are usually installed on the motor vehicle to alleviate and eliminate the structural impact fed back from the road surface to the motor vehicle dynamic suspension system, reduce the structural vibration caused by it, and reduce the pressure of the driver and passengers. discomfort. [0003] Please refer to figure 1 , figure 1 It is a partial structural sectional view of a typical hydraulic damping device in the prior art. [0004] At present, the existing hydraulic shock absorbing device usually includes an outer cylinder body 11, the front end of the outer cylinder body 11 is inserted with a front fork tube 12, the middle part of the outer cylinder body 11 has a positioning tube 13, and the middle ...

AI Technical Summary

Problems solved by technology

[0005] During the working process, the cavity between the positioning tube 13 and the outer cylinder 11 is filled with shock absorbing oil. When the hydraulic shock absorbing device is subjected to pressure from the power suspension system of the motor vehicle, the front fork tube 12 is pressed and moves backward. At this time, the damping spring 14 is compressed, and the damping oil enters the positioning tube 13 from the cavity between the positioning tube 13 and the outer cylinder 11 through the oil hole on the positioning tube 13, so as to relieve the shock caused by the front fork tube 12. However, due to the high oil pressure in the shock absorbing process, the shock absorbing oil can easily enter the soundproof valve through the gap between the soundproof valve and the positioning pipe 13 , and impact the relevant structure of the soundproof valve, thereby forming noise, which is further amplified after being transmitted to the vehicle body outside the hydraulic shock absorber, seriously affecting the normal use of the hydraulic shock absorber

Images