Pressure-fluid mechanism with sleeve-shaped contact pieces, such as, for example, a hydraulic motor or a hydraulic pump

摘要

The invention relates to a hydraulic motor, consisting of: a cam path; a cylinder block which is rotatably arranged with regard to the cam path and contains a communication surface (3); cylinders fed with pressure fluid; an inner fluid distributor (10) which contains two transverse surfaces, one for the distribution (19) which bears on the communication surface (3) and one for an axial pressure (20) which is opposite the distribution surface; a locking device (11) for the inner fluid distributor relative to the cam path in respect of the rotatability; receptacles (32); sleeve-shaped contact pieces (23), each having a first part which is accommodated in a receptacle (32), and a second part which projects from the receptacle, provided with a surface (36) bearing on the axial-pressure surface (20); restoring members (35) which each bear on the base (34) of a receptacle and produce an axial pressure for superimposing the surface (36) of the contact piece on the axial-pressure surface (20); sealing elements which each bear on the walls of a receptacle. According to the invention, the sealing element (35) is formed by the elastic restoring member (35). An application is the realisation of a compact axial motor. <IMAGE>