Patent ID: 7891285
Filing Date: 2011-02-22
Classification: F04B,F16C

Abstract:
1. A bearing restricting device in a swash plate hydraulic pump or motor, the swash plate hydraulic pump or motor comprising: a swash plate having a convex arc surface formed on a back surface; a swash plate support on which a concave arc surface facing the convex arc surface of the swash plate is formed, the convex arc surface of the swash plate being supported on the concave arc surface of the swash plate support so as to freely swing in a circumferential direction by interposing a bearing between the convex arc surface and concave arc surface; a restricting pin for restricting movements of the bearing; wherein the restricting pin is rotatably supported on a swash plate side surface at a one end, and engages with an engagement portion formed on a holder of the bearing in a loosely fitting manner at an intermediate portion, and is inserted in a support rod supported rotatably around an axis on the swash plate support at an other end so as to be movable in a pin axial direction of the restricting pin; and wherein the convex arc surface is provided in pairs each formed on the back surface of the swash plate on both sides of a shaft through hole which a drive shaft or output shaft is inserted through, and the swash plate supports, the bearing, the restricting pin and the support rod are provided in pairs each corresponding to the pair of convex arc surfaces, respectively and wherein each support rod penetrates each swash plate support in a direction orthogonal to the pin axial direction of the restricting pin rotatably around the axis, one end of the support rod projecting from one side surface of the swash plate support, the other end of the restricting pin being inserted into the projecting end portion movably in the pin axial direction, and the other end of the support rod being engaged with the other side surface of the swash plate support so as not to come out.