Patent ID: 9611858
Date: 2017-04-04
CPC Classifications: F04D,F16H

Claim:
1. A water pump, comprising: a rotatably disposed impeller; a pump housing having a pump chamber housing the impeller and a cylindrical section continued on the pump chamber; a drive shaft rotatably inserted into the cylindrical section, one end section of the drive shaft being projected from the cylindrical section, and the impeller being disposed on the other end section of the drive shaft; a flange wall extended in a radial direction from the one end section of the drive shaft; a pulley having another cylindrical section disposed on an outer periphery of the cylindrical section and formed continuously with the outer periphery of the flange wall, and a belt attachment section projected in the radial direction from the outer periphery of the other cylindrical section; a metallic member fixed to an inner peripheral surface of the other cylindrical section; and a bearing intervened between the metallic member and an outer peripheral surface of the cylindrical section of the pump housing to rotatably hold the pulley; wherein the drive shaft and the pulley are integrally formed with a synthetic resin material in which glass fiber is contained, and, on the flange wall, a plurality of reinforcement ribs are installed and radially extended between a center section and the other cylindrical section, and wherein the glass fiber is radially oriented toward a radial end direction of the flange wall.