CAM PLATE TYPE AXIAL PISTON PUMP MOTOR
Document Type and Number:
Japanese Patent JP2984470
PURPOSE: To alleviate a pinching force acting on a piston at the side of BDC in a cam plate type axial piston pump motor, and reduce a wear, seizure or the like.
CONSTITUTION: A cam plate slide plane 91 where the shoe 8 of a cam plate type axial piston pump motor is jointed, is formed to have a spherical shape, and a cam plate 9 is so laid so as to be rotatable about an axis vertical to a plane across the intersection O2 of a phantom spherical plane 92 on the cam plate 9 between the coupling centers of a piston 3 and the shoe 8, and the rotational center axis Z-Z of a cylinder block 1. According to this construction, a pinching force acting on the piston 3 at the side of BDC can be alleviated.
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