Patent ID: 9182020
Filing Date: 2015-11-10
Classification: B60S,F16C,F16H,Y10T

Abstract:
1. A wiper motor having a motor body, and a motion conversion mechanism converting turning motion of the motor body into swinging motion having a first swing range or a second swing range narrower than the first swing range and transmitting the swinging motion to an output shaft, wherein a position of the output shaft swung within the first swing range differs from a position of the output shaft swung within the second swing range, the wiper motor comprising: a worm driven by the motor; a worm wheel made meshing with the worm, in which at least a pair of first connecting holes for the first swing range and at least a pair of second connecting holes for the second swing range are formed at respective positions deviated in a radial direction from an axial center of the worm wheel so that each pair of the connecting holes opens on one end face in an axial direction of the worm wheel, wherein an angle between line segments defined on said one end face so as to extend from the axial center of the worm wheel to respective axial centers of the first connecting holes differs from an angle between line segments defined on said one end face so as to extend from the axial center of the worm wheel to respective axial centers of the second connecting holes; and a connecting shaft rotatably connecting the first connecting holes or the second connecting holes of the worm wheel to a first motion conversion member of the motion conversion mechanism, wherein the first motion conversion member meshes with an output gear integral with the output shaft, thereby swing a wiper member connected to the output shaft within the first or second swing range, wherein the axial center of each connecting hole of the pair of first connecting holes is disposed at the same, first distance from the axial center of the worm wheel, and the axial center of each connecting hole of the pair of second connecting holes is disposed at the same, second distance from the axial center of the worm wheel, the second distance being different than the first distance, and wherein the first connecting holes and the second connecting holes are alternatively disposed in a circumferential direction of the worm wheel.