SWASH PLATE TYPE PISTON PUMP MOTOR

• Main Authors: KOBAYASHI HIDEKAZU, UMEDA TOKIHIKO
• Format: Patent
• Language: English
• Published: 03.03.1992
• Subjects: BLASTING; HEATING; LIGHTING; MACHINES OR ENGINES FOR LIQUIDS; MECHANICAL ENGINEERING; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS; PRODUCING MECHANICAL POWER; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS

PURPOSE:To effectively prevent noise transmission to the outside by disposing the whole housing in such a manner as being spaced apart from a pump motor main body, and supporting the housing by means of the pump motor main body in its axial and radial directions via elastic supporting members which are interposed in plural portions of the space between the housing and the pump motor main body. CONSTITUTION:A piston pump motor has a plurality of pistons 4 each fitted into a tubular cylinder 2 connected to the outer periphery spline of an output shaft 1. A spherical head portion 5 formed at the projecting end portion of each piston 4 is fitted with the sperical recessed face of a shoe 6 in such a manner as being freely slid. The shoe 6 is pressed into contact with a shoe plate 7 which is engaged with a swash plate 8. That end face of the cylinder 2 which is opposite to the shoe plate 7 is supported by a cover 13 via a valve plate 12 in such a manner as being freely rotated. Housing 26 is attached to a pump motor main body 25 thus constituted and two inward flanges 40, 41 are provided on the peripheral wall 27 of the housing 26 while being interposed between both flanges 30, 32 and elastic supporting members 42, 43 such as O rings etc. are interposed between the flanges.