Piston assembly for automobile damping device

The utility model discloses a piston assembly for an automobile damping device. The piston assembly comprises a piston body and a movable sealing piece, the piston body is provided with a plurality ofsets of damping holes enabling damping sleeve cavities corresponding to the upper end and the lower end of the piston to be communicated, when the piston body descends, the movable sealing piece is sealed in at least one set of damping holes, and when the piston body ascends, the movable sealing piece opens the corresponding damping holes; the damping force is changed in the descending compression and ascending recovery processes of the piston body, so that the recovery force and the compression force of the shock absorption device are unequal, the overall shock absorption capacity is improved, and the riding comfort is improved. 本实用新型公开了一种汽车减震装置用活塞组件，所述活塞组件包括活塞体以及活动密封件，所述活塞体上开设有若干组使活塞上下端对应的减震套腔体贯通的阻尼孔，在活塞体下行时，所述活动密封件密封于至少其中一组阻尼孔，在活塞体上行时，所述活动密封件打开相应的阻尼孔；该活塞组件配合减震筒使用，本实用新型在活塞体下行压缩和上行复原过程中阻尼力发生变化，使得减震装置复原与压缩力不等，提高整