Assisting damper, damping assembly and cover plate device

An assisting damper, characterized by comprising a shell I (1), a pin roll (2), a driving shaft (3), a driven shaft (4) and a spring assembly (5), wherein a damper working chamber (11) is arranged in the shell I (1), one end of the pin roll (2) penetrates out of a head end (111) of the damper working chamber (11), the other end is fixed with one end of the driving shaft (3), the other end of the driving shaft (3) is in contact with one end of the driven shaft (4), spiral cam structures matched with each other are respectively provided on the contact surfaces of the driving shaft (3) and the driven shaft (4), the other end of the driven shaft (4) is connected with one end of the spring assembly (5), the shape of a base (41) of the driven shaft (4) is matched with the shape of the longitudinal section of the damper working chamber (11), the base (41) does not rotate in the damper working chamber (11), the other end of the spring assembly (5) is in contact with a tail end (112), opposite to the head end (111), of the damper working chamber (11);

• the driving shaft (3), the driven shaft (4) and the spring assembly (5) are all located in the damper working chamber (11), and when the driving shaft (3) rotates, the driven shaft (4) is driven to translate along the length direction of the damper working chamber (11).