Damping keeping device for magnetorheological shock absorber

Abstract

The present invention discloses a damping keeping device for a magnetorheological shock absorber. The damping keeping device comprises a piston assembly and a compensation part which is arranged on the piston assembly and has a gap with a cylinder barrel of the magnetorheological shock absorber, wherein the compensation part is made of a heat-sensitive material; the cylinder barrel is provided with a first liquid storage cavity for storing cooling liquid; and the piston assembly is provided with a draining channel for directing the cooling liquid in the first liquid storage cavity to the compensation part. According to the damping keeping device for the magnetorheological shock absorber, by arranging the compensation part made of the heat-sensitive material on the piston assembly, the compensation part can adjust the size of the gap with the cylinder barrel by using the characteristics of cold shrinkage and thermal expansion of the heat-sensitive material, thereby compensating the phenomenon of damping force weakening because magnetorheological liquid becomes thin due to heat production when the shock absorber works, so as to guarantee that the damping force of the magnetorheological shock absorber is constant.

Description

technical field [0001] The invention belongs to the technical field of shock absorbers, in particular, the invention relates to a damping retaining device of a magneto-rheological shock absorber. Background technique [0002] At present, shock absorbers are mostly standardized at home and abroad. Most of the existing magneto-rheological fluid shock absorbers adopt fixed piston heads. When the shock absorber works for a long time, the gap between the piston head and the cylinder will become larger due to the temperature rise, and the magnetorheological fluid will become thinner due to the temperature rise in the cylinder, both of which will lead to shock absorption. The damping force of the cylinder decreases, and the shock absorption effect becomes unsatisfactory. Also, due to the temperature difference between the bottom and the top of the cylinder, the upper and lower inner diameters of the cylinder are inconsistent, resulting in uneven damping force. Furthermore, becaus...

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Problems solved by technology

When the shock absorber works for a long time, the gap between the piston head and the cylinder will become larger due to the temperature rise, and the magnetorheological fluid will become thinner due to the temperature rise in the cylinder, both of which will lead to shock absorption. The damping force of the cylinder decreases, and the damping effect becomes unsatisfactory. Also, due to the temperature difference between the bottom and the top of the cylinder, the upper and lower inner diameters of the cylinder are inconsistent, resulting in uneven damping force.

Furthermore, because similar shock absorbers do not have a height-adjustable function, and the existing height-adjustable shock absorbers can only adjust their stiffness, but their travel cannot be adjusted, which greatly reduces the adaptability of their application scenarios.

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