VARIABLE DISPLACEMENT SWASH PLATE LIQUID PRESSURE ROTATING MACHINE

PROBLEM TO BE SOLVED: To securely prevent the stop position at the full stroke of a servo piston from slipping out of place without increasing the shape dimension of a servo piston housing. SOLUTION: Springs are arranged outside both end surfaces of the servo piston 1 to urge the servo piston 1 to a neutral position, and comprised of a first spring 8 located radially inside, and a second spring 9 located outside. A variable displacement swash plate liquid pressure rotating machine is provided with a first spring seat 10 to receive one end located at the servo piston 1 side of the first spring 8 and the second servo piston 9, a second spring seat 11 to receive the other end located at covers 6 and 7 of the first spring 8 and the second spring 9, having a projection 11a extended in the sliding direction of the servo spring 1 and inserted into the first spring 8 at the servo piston 1 side, and a bolt 12 fastened to the servo piston 1, relatively and slidably supporting the second spring seat 11. The end surface of the projection 11a in the second spring seat 11 forms a restriction part 11a to restrict the sliding of the servo piston 1. COPYRIGHT: (C)2007,JPO&INPIT