Patent ID: 7883100

Claim:
A suspension lift system for golf carts, comprising: a carriage; an undetachable front frame comprising a bottom support bracket, a front support bracket, and a middle support bracket fixed to the bottom support bracket and the front support bracket, the front frame being unitarily welded and then to be fixed to the carriage; an upper arm comprising a first mounting side pivotally connected to the front frame, and a second mounting side opposite to the first mounting side, the upper arm being swing in a vertical plane, the second mounting side comprising a spindle connection end defining a through opening; a lower arm comprising a third mounting side pivotally connected to the front frame, and a fourth mounting side opposite to the third mounting side, the lower arm being swing in the vertical plane; a rotatable apparatus comprising an upper bracket pivotally connected to the second mounting side of the upper arm, a lower bracket pivotally connected to the fourth mounting side of the lower arm, and a pole connecting the upper and the lower brackets, the upper bracket comprising a pair of lugs and a receiving space formed between the pair of lugs for accommodating the spindle connection end, each lug defining a through hole aligned with the through opening; a steering knuckle comprising a sleeve receiving the pole and an axle adapted to receive a wheel, the sleeve being rotatable in a horizontal plane with respect to the upper and the lower brackets; and an absorber with one end mounted to the front frame and the other end mounted to either the upper arm or the lower arm; wherein the through opening of the spindle connection end and the through hole of each lug are threaded by a pin in order to combine the spindle connection end and the upper bracket.