A magnetorheological fluid shock absorber

Abstract

A magnetorheological fluid shock absorber, including a connector, a working cylinder, an oil storage cylinder assembly, an intermediate cylinder assembly, and an outer pole cylinder, the oil storage cylinder assembly is connected to the connector, and the working cylinder is installed in the inner cavity of the oil storage cylinder assembly , the upper end is matched with the upper body of the oil storage cylinder assembly through the guide, the waist is connected with the inner wall of the waist of the oil storage cylinder assembly, the bottom end is connected with the bottom valve assembly, and the cavity between the oil storage cylinder assembly and the working cylinder forms an oil storage chamber. The inner chamber of the working cylinder is equipped with a piston valve assembly, and the inner chamber of the working cylinder is divided into the upper chamber of the working cylinder and the lower chamber of the working cylinder. The middle cylinder assembly is located in the cavity between the oil storage cylinder assembly and the working cylinder. The gap between the inner walls of the oil storage cylinder assembly forms a circulation channel that communicates with the upper chamber of the working cylinder and the oil storage chamber, and the outer pole cylinder is installed on the outer circumference of the waist of the oil storage cylinder assembly, so that the circulation channel at this section forms a magnetic field work area. The shock absorber has a large adjustable range of damping force, simple, precise and fast control, good heat dissipation effect, simple structure and low processing cost.

Description

technical field [0001] The invention relates to a component used in a vehicle suspension system, in particular to a magneto-rheological fluid shock absorber. Background technique [0002] There are following deficiencies in the shock absorber used in the current common suspension: [0003] 1. The size of its damping depends on the elasticity of each valve group. Once the valve groups are adjusted and installed, the damping characteristics of each valve part of the shock absorber and the damping performance of the shock absorber are also determined. Because Its damping cannot be adjusted, so the damping characteristics of the suspension system cannot change well with the change of the vehicle's operating conditions, which seriously affects the performance of the vehicle, and cannot take into account the comfort and handling stability of the vehicle at the same time; [0004] 2. Magneto-rheological fluid is a kind of "smart material". The damping force of the shock absorber...

AI Technical Summary

Problems solved by technology

[0003] 1. The size of its damping depends on the elasticity of each valve group. Once the valve groups are adjusted and installed, the damping characteristics of each valve part of the shock absorber and the damping performance of the shock absorber are also determined. Because Its damping cannot be adjusted, so the damping characteristics of the suspension system cannot change well with the change of the vehicle's operating conditions, which seriously affects the performance of the vehicle, and cannot take into account the comfort and handling stability of the vehicle at the same time;

[0004] 2. Magneto-rheological fluid is a kind of "smart material". The damping force of the shock absorber can be changed by using its rheological properties that will change under the action of different magnetic field strengths. However, the existing single-tube magneto-rheological The device needs to process the slender hole of the piston rod, which is not only difficult to process, but also the internal circulation of the magnetorheological fluid is not good, it is not easy to dissipate heat, and it is easy to cause serious performance attenuation of the magnetorheological fluid due to excessive temperature;

[0005] 3. The application announcement number is CN102364154A published invention patent application "Passive Damping Adjustable Magnetorheological Fluid Shock Absorber", which uses induction coils to cut the magnetic field lines of permanent magnets, and generates induced currents to achieve the purpose of changing the damping force. By changing the profile line of the damping channel It is helical to increase the length of the damping channel, but it also has the disadvantages of complex structure, difficult processing, poor internal circulation of magnetorheological fluid, and difficulty in heat dissipation

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