Patent ID: 7954226
Filing Date: 2011-06-07
Classification: F16H,H02K,Y10T

Abstract:
1. A method of manufacturing a gear unit of a motor, the method comprising: providing a motor portion having a motor shaft; providing a worm, said worm receiving driving torque from said motor portion via said motor shaft; providing a helical gear, said helical gear receiving torque from said worm; providing an output shaft, said output shaft rotating with said helical gear for transmitting the torque to an outside; forming a gear box composed of resin; forming a fixed shaft having a hollow and cylindrical shape with an opening at one end portion thereof and a ceiling surface at least partially closing another end portion thereof; subjecting said open side end portion of said fixed shaft to dislocation preventive work such that a collar-shaped portion is formed on an outer periphery of said fixed shaft on said open side end portion, said collar-shaped portion protruding from the outer periphery of said open side end portion in a radial direction, said radial direction being perpendicular to a longitudinal direction of said fixed shaft; fixing said fixed shaft to said gear box via insert molding such that molding resin is inserted into said gear box and an interior of said fixed shaft, wherein molding resin located in said interior of said fixed shaft engages said resin of said gear box, said open side end portion being fixed to said gear box; and arranging said output shaft and said helical gear on said fixed shaft.