Shock absorber for a power wheelchair

摘要

A shock absorber is installed in a power wheelchair to absorb shocks transmitted from rear wheels of the power wheelchair. The shock absorber includes a bracket, a seat and a suspension device. The suspension device is installed between the bracket and the seat and includes two suspension springs. Each suspension spring has a different spring stiffness. The seat is pivotally connected to the bracket at a pivot point between the two suspension springs. Consequently, the suspension springs will balance absorbing shocks caused by bumps while the power wheelchair is moving.