Double-cylinder type magneto-rheological damper with inner and outer coils

Abstract

The invention discloses a double-cylinder type magneto-rheological damper with inner and outer coils. The double-cylinder type magneto-rheological damper comprises a piston rod, a piston, an inner cylinder barrel, an outer cylinder barrel, an end cover, a dustproof ring, the inner coil, the outer coil, a coil protective layer, a compensation air bag, a bottom locating piece and a nut, wherein the piston rod is tightly connected with the piston; the piston is positioned in the inner cylinder barrel; the inner cylinder barrel is fixed with the bottom locating piece through the end cover; the bottom locating piece is tightly connected with the outer cylinder barrel; a through hole is formed in the middle of the bottom locating piece and used for compensating for an air bag valve port so as to enable the air bag valve port to extend out of the damper; the compensation air bag is mounted at the bottom of the inner cylinder barrel; the end cover is tightly connected with the outer cylinder barrel; the inner coil and the outer coil are wound on the end cover; the dustproof ring is mounted at the top of the inner hole of the end cover; and an end part groove is formed in the part below the end cover. The double-cylinder type magneto-rheological damper with inner and outer coils has the benefits as follows: the structure is simple, the processing and manufacturing are convenient, the cost is low, the damping force of the damper is adjusted, the inner coil has a sealing function, and the sealing performance is good.

Description

technical field [0001] The invention relates to the technical field of vehicle vibration reduction, and mainly relates to a double-tube magneto-rheological shock absorber with inner and outer double coils. technical background [0002] With the continuous development and progress of the economy and society, consumers have higher and higher requirements for vehicles. Whether it is a passenger car or a commercial vehicle, in addition to meeting the original performance requirements, consumers have higher requirements for driving and riding comfort. Also getting higher and higher. As a new type of intelligent shock absorber, the magneto-rheological shock absorber has the advantages of fast response speed, large dynamic adjustment range of damping force, and low energy consumption. The transmission of vibration on the vehicle improves the ride and driving comfort of the vehicle, so it is more and more widely used in the field of vehicle shock absorbers. [0003] However, the a...

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Problems solved by technology

[0003]However, the application range of the existing magneto-rheological shock absorbers is still limited to high-end vehicles due to the difficulty of processing and cost constraints, even for mid-range vehicles. More common, let alone low-end cars with a wider audience

The reason why the magneto-rheological shock absorber is difficult to process is that, first of all, the existing magneto-rheological shock absorbers mostly use piston circumferential grooves to arrange coils, so that although the coil structure is simple, the coils are therefore arranged in the shock absorber cylinder. Inside, it moves with the movement of the piston. In order to lead out the coil wire, it is necessary to open a hole in the middle of the piston rod, and the processing cost is relatively high.

Secondly, because the gas pressure in the compensating air chamber is relatively high, the pressure inside the shock absorber is relatively high, which requires high dynamic sealing performance between the piston rod and the port, so it is necessary to use multi-stage sealing rings to reduce the pressure difference step by step. To achieve the sealing effect, the structure is complex, and the processing and assembly are difficult

Finally, because the lateral force capacity of the single-tube shock absorber is low, it is necessary to make corresponding structural improvements to the suspension system or adopt a strut type single-tube gas-filled shock absorber structure, which further increases the cost

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