Magneto-rheological shock absorber

Abstract

The invention discloses a magneto-rheological damper comprising a cylinder barrel, a piston rod and a damping holding device. The cylinder barrel is provided with a first liquid storing cavity for storing cooling liquid, the damping holding device comprises a piston assembly arranged in the cylinder barrel and connected with the piston rod, and a compensating piece arranged on the piston assembly,and a gap is formed between the compensating piece and the cylinder barrel; the compensating piece is made of a heat-sensitive material, the piston assembly is provided with a flow guiding channel for guiding the cooling liquid in the first liquid storing cavity to the compensating piece. According to the magneto-rheological damper, the compensating piece made of the heat-sensitive material is arranged on a piston, by using the characteristic of thermal expansion of the heat-sensitive material, and the gap between the compensating piece and the cylinder barrel is adjustable, so that the phenomenon of damping force weakening due to the fact that magneto-rheological liquid becomes thinner due to heat generated when the damper works is compensated, and the constant damping force is ensured.

Description

technical field [0001] The invention belongs to the technical field of shock absorbers, in particular, the invention relates to 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, because similar shock absorbers do n...

AI Technical Summary

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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