TWI839029B

This rear cushion unit (RCU) is interposed between a vehicle body (F) and a rear wheel (W) of a saddled vehicle (M), and comprises: a cylinder (1); a piston (2) which is movably inserted into the cylinder (1) and divides the inside of the cylinder (1) into an expansion-side chamber (R1) and a pressure-side chamber (R2) which are filled with a liquid; a piston rod (3) which is movably inserted into the cylinder (1) and is connected to the piston (2); a tank (4) for accommodating the liquid; a first passage (P1) and a second passage (P2) which connect the expansion-side chamber (R1) and the pressure-side chamber (R2) in parallel to each other; a third passage (P3) which connects the pressure-side chamber (R2) and the tank (4); an expansion-side damping force adjusting passage (P4) which is provided outside the cylinder (1) and connects the expansion-side chamber (R1) and the pressure-side chamber (R2); an expansion-side damping valve (5) which is provided to the first passage (P1) and applies resistance to flow