Wiper motor
AssigneeMitsuba Corporation
InventorsTeppei Tokizaki, Shigeki Ota
Life of this patent
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Abstract
A wiper motor 10 has a reduction mechanism 29 for reducing the rotational speed of a motor shaft 25 and transmitting the reduced speed, and a motion conversion mechanism 31 for converting the rotational motion of the reduction mechanism 29 into a rotational motion and transmitting the motion to the output shaft 30. A pair of first connection holes 50 and a pair of second connection holes 51 are formed on a worm wheel 35 at a position deviated in a radial direction from an axial center of the worm wheel so that each of the holes is opened at the side of one axial end side. The worm wheel 35 can be used for both cases in which the output shaft 30 is swung within a first swinging region and in which the output shaft 30 is swung within a second swinging region.
Claims5
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, comprising:
- a worm turingly driven by the motor body;
- a worm wheel meshing with the worm, in which at least a pair of first connecting holes being basis of the first swing range and at least a pair of second connecting holes being basis of the second swing range are formed at a position deviated in a radial direction from an axial center of the worm wheel so that each of the holes is opened at the side of one axial end side;
- and
- a connecting shaft rotatably connecting a first motion conversion member to one of the first connecting holes formed in the worm wheel if the motion conversion mechanism comprises the first motion conversion member meshing with an output gear integrally rotating with the output shaft and swinging the output shaft within the first swing range, or rotatably connecting a second motion conversion member to one of the second connecting holes formed in the worm wheel if the motion conversion mechanism comprises the second motion conversion member rotatably connected to a lever member integrally rotating with the output shaft and swinging the output shaft within the second swing range.
Dependencies are inferred from the claim text.