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Motor having rotatable shaft coupled with worm shaft
| Details |
Inventors: Kawakami, Takenobu; Suzuki, Keijiro; Saitou, Toshihiro; Adachi, Tadashi; Yamamoto, Hiroaki; Masuda, Toshiyuki; Shibata, Kouji;
Assignee: Asmo Co., Ltd. (Shizuoka, JP)
Primary Examiner: Mullins; Burton S.
Assistant Examiner: Mohandesi; Iraj A.
Attorney, Agent or Firm: Posz & Bethards, PLC
A driving-side rotator of a clutch has a connecting hole, within which a connecting portion of a rotatable shaft is loosely fitted while providing a space between the connecting hole and the connection portion. The connecting hole of the driving-side rotator is engageable with the connecting portion of the rotatable shaft in a rotational direction to integrally rotate with connecting portion of the rotatable shaft. Two positioning holes are provided in a brush holder, and two positioning projections are provided in a gear housing to allow direct positioning of the brush holder and the gear housing relative to each other. |
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DETAILED DESCRIPTION The present invention addresses the above disadvantages.
Thus, it is an objective of the present invention to provide a motor capable of reducing generation of noises and vibrations at a connection between a rotatable shaft of a rotor and a worm shaft.
To achieve the objective of the present invention, there is provided a motor including a motor main body, a speed reducing unit and a coupling means.
The motor main body includes a rotatable shaft and rotates the rotatable shaft.
The speed reducing unit is connected to the motor main body and includes a worm shaft.
The worm shaft is substantially coaxial with the rotatable shaft.
The coupling means couples the rotatable shaft with the worm shaft.
The coupling means includes a driving-side rotator and a driven-side rotator.
The driving-side rotator is connected with the rotatable shaft to rotate integrally with the rotatable shaft.
The driven-side rotator is connected with the worm shaft to rotate integrally with the worm shaft and is engageable with the driving-side rotator in a rotational direction.
The rotatable shaft includes a connecting portion.
The driving-side rotator includes a connecting portion, which is loosely fitted with the connecting portion of the rotatable shaft and is engageable with the connecting portion of the rotatable shaft in the rotational direction to rotate integrally with the connecting portion of the rotatable shaft.
To achieve the objective of the present invention, there is also provided a motor including a motor main body, a brush holder, a speed reducing unit, a coupling means and a positioning means.
The motor main body includes a yoke housing.
The yoke housing rotatably receives an armature, which includes a rotatable shaft and a commutator.
The brush holder is placed in an opening of the yoke housing.
The brush holder holds a plurality of brushes in sliding contact with the commutator and includes a bearing, which rotatably supports the rotatable shaft.
The speed reducing unit includes a gear housing connected to the yoke housing in such a manner that the brush holder is arranged between the opening of the gear housing and an opening of the yoke housing
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