Multi-shear plane magnetorheological torsional shock absorber and its automotive seat

Abstract

The invention provides a multi-shearing surface magnetorheological torsion damper and a car seat with the same. The multi-shearing surface magnetorheological torsion damper comprises a cylinder body comprising at least one cavity and a motion rod protruding out from the cavity. The motion rod is in seal fit with the cylinder body in a manner of capable of rotating around self-axis. The multi-shearing surface magnetorheological torsion damper also comprises a damping adjusting unit disposed in the cavity. The damping adjusting unit comprises a follower, a magnet exciting coil and a shear cover fixedly arranged on the inner wall of the cavity. The inner cavity of the shear cover and the corresponding cavity form a damping cavity together. The damping cavity is filled with a magnetorheological medium. The outer periphery of the magnet exciting coil is wound around the follower. The magnet exciting coil and the follower extend into the inner cavity of the shear cover and are spaced from the inner wall of the shear cover axially and radially to form magnetorheological medium shear surfaces. The multi-shearing surface magnetorheological torsion damper can output greater torque to restrain vibration on the condition of small torsion angle of torsional vibration; while the greater output torque can be guaranteed, the overall structure can be kept compact, the occupied space of the overall structure can be reduced and favorable direct fit can be formed on concrete use conditions.

Description

technical field [0001] The invention relates to the field of magnetorheological vibration damping, in particular to a multi-shear surface magnetorheological torsional vibration damper and an automobile seat thereof. Background technique [0002] Seats in cars and airplanes provide passengers with good comfort, but vertical vibrations cause extreme discomfort to the human body, and damping materials need to be added, but because they are not self-adaptive, the improvement in comfort is extremely limited , so there is a patent [CNIO306227OA] [CN203532615U] that proposes to use a magneto-rheological damper. However, the previous structures are bulky and difficult to arrange. Therefore, it is necessary to combine the characteristics of the seat vibration and use the torsional vibration in the center of the seat support frame, so the torsional shock absorber can be used for vibration suppression. By improving the existing torsional shock absorber, it can output a larger torque ...

AI Technical Summary

Problems solved by technology

[0002] Seats in cars and airplanes provide passengers with good comfort, but vertical vibrations cause extreme discomfort to the human body, and damping materials need to be added, but because they are not self-adaptive, the improvement in comfort is extremely limited , so there is a patent [CNIO306227OA] [CN203532615U] that proposes the use of a magneto-rheological damper to achieve

However, the previous structures were bulky and difficult to arrange

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