The utility model relates to a shock-proof
stroke pre-adjusting structure of a seat
cushion pipe, which comprises a shock-proof
pipe group, a seat bone and an adjusting connecting
rod group arranged between the shock-proof
pipe group and the seat bone, the shock-proof pipe group is provided with a seat pipe, the seat pipe is provided with a shock-proof
piston rod capable of generating an elastic shock-proof
stroke, and the adjusting connecting
rod group is connected with the shock-proof
piston rod. The adjusting connecting
rod group is provided with an upper connecting seat and a lower connecting seat which can be respectively pivoted on the shock-absorbing tube group and the seat bone, a buffer
cushion block is selectively arranged on the surface of one side of the upper connecting seat corresponding to the lower connecting seat, and a pressing roller is arranged on the surface of one side of the lower connecting seat corresponding to the shock-absorbing
piston rod. Therefore, the return position of the seat bone can be changed through the thickness of the buffering
cushion block, a pre-pressing shock-proof
stroke with different lengths is generated, the shock-proof pipe set with the same specification can be suitable for different vehicle types, and further the material preparation cost of a vehicle factory can be effectively reduced.