Hydraulic damper without idle course

Abstract

The invention relates to a hydraulic damper without idle stroke, which comprises an enclosed cylinder body (4). A piston (7) which can slide in the cylinder body and a piston rod (2) which is connected with the piston are arranged in the inner chamber of the cylinder body (4). The invention is characterized in that the inner chamber of the cylinder body (4) is further provided with a floating-ring (8) which can slide in the cylinder body, the inner chamber of the cylinder body (4) is separated into a first working chamber (A), a second working chamber (B), and a third working chamber (C) by the piston (7) and the floating-ring (8), the piston rod (2) is penetrated through the first working chamber (A) and is conducted hermetically from one end of the cylinder body (4), the other end of the cylinder body (4) is provided with a plug (9), the first working chamber (A) and the second working chamber (B) are separated by the piston and are fed with hydraulic liquid, and the third working chamber (C) is positioned between the floating-ring (8) and the plug (9) and is fed with air with pressure intensity. The invention has the advantages of no idle stroke, long service life, excellent radiation, low costs of material, and controlled amplitude precision and the like.

Description

technical field [0001] The invention relates to a hydraulic damper, which is connected between a structure to be protected (such as the body of a motor vehicle) and an external disturbance source (such as a wheel in direct contact with the ground), capable of using the viscous flow of hydraulic fluid in the damper to Dissipates shock energy from external sources of disturbance. It belongs to the technical field of sealed pneumatic metal hardware. Background technique [0002] A traditional hydraulic damper has a cylinder, a piston that slides within the cylinder, and a piston rod attached to the piston, which is surrounded by a return spring. The cylinder body is a double cylinder structure, which is composed of an outer cylinder body and an inner cylinder body arranged coaxially. The inner and outer cylinders communicate with each other through springs and pressing pieces arranged at the end of the inner cylinder. The piston is arranged in the inner cylinder, and the pis...

AI Technical Summary

Problems solved by technology

[0004] 1. Poor shock absorption

[0005] During the reset process of the piston rod, the volume occupied by the piston rod will leave a cavity in the first working chamber, which is filled by the gas phase in the hydraulic fluid, and when the piston rod is pushed by an external force to slide the piston in the inner cylinder , the rapid movement of the piston in the cavity in the second working chamber produces an empty space, which causes vibration and gives people a feeling of landing, causing great discomfort to the driver, which will greatly weaken the shock absorption performance of the hydraulic damper

[0006] 2. Short service life

[0007] During the frequent reciprocating movement of the piston, the two sets of spring sheets on both sides of the piston are often easily broken by the hydraulic fluid with a large impact force, which will affect the service life of the hydraulic damper

[0008] 3. Poor heat dissipation

[0010] 4. High material cost

[0011] The cylinder body of the hydraulic damper adopts a double-tube structure, and a return spring is added, which is not only bulky, but also requires a lot of materials and high material costs

[0012] 5. The amplitude cannot be precisely controlled

[0013] The one-way valve on the piston is composed of a spring plate and a liquid guide hole, which cannot accurately control the flow rate of the hydraulic fluid between the two working chambers of the cylinder, and cannot accurately control the amplitude of the damper

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