Patent ID: 8376080
Filing Date: 2013-02-19
Classification: B62D,F04C,F05C

Abstract:
1. A pump apparatus comprising: a first housing member which includes a first drive shaft insertion hole extending in an axial direction; a second housing member which includes a second drive shaft insertion hole extending in the axial direction, and which is disposed to confront the first housing member; a pump element disposed between the first housing member and the second housing member, and arranged to suck and discharge a hydraulic fluid by rotating; a pump drive shaft rotatably inserted into the first drive shaft insertion hole and the second drive shaft insertion hole, and arranged to drive and rotate the pump element; a first abutment portion formed in the second housing member, and arranged to position the second housing member with respect to the first housing member in a radial direction by abutting, from a radially inside direction of the first housing member, on a first positioning protruding portion protruding from the first housing member toward the second housing member; a second abutment portion formed in the second housing member, and arranged to position the second housing member with respect to the first housing member in a swing direction of the second housing member about the first positioning protruding portion, by abutting, in the swing direction, on a second positioning protruding portion protruding from the first housing member toward the second housing member; and a joining member joining the first housing member and the second housing member, the first and second drive shaft insertion holes being previously co-processed in a state in which the first housing member and the second housing member are relatively positioned by abutments between the first and second positioning protruding portions and the first and second abutment portions, and the joining member joining the first housing member and the second housing member in a state in which the first housing member and the second housing member are relatively positioned by the abutments of the first and second positioning protruding portions and the first and second abutment portions so as to re-create a relative position between the first housing member and the second housing member at the co-processing.