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Motor apparatus having rotational position detector

A technology of motor unit and brush, which is applied in the direction of electromechanical devices, electrical components, electric components, etc., can solve the problems of reducing the reliability of waterproofing of wiring structures, increasing the number of components and the number of working processes, and lengthening of wiring structures, etc.

Inactive Publication Date: 2006-03-01
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Accordingly, the connector unit (wiring) fixed outside the gear case connects the connection terminal of the fixed terminal and the connection terminal connected to the brush to excite the armature, so that the wiring structure becomes long and complicated, increasing the number of parts and number of work processes, and reduces the reliability of the waterproofing of the wiring structure

Method used

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  • Motor apparatus having rotational position detector
  • Motor apparatus having rotational position detector
  • Motor apparatus having rotational position detector

Examples

Experimental program
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Embodiment Construction

[0018] The motor arrangement according to the invention is described below. The motor device 1 is used to start the wiper system (especially the rear wiper system). Such as figure 1 As shown, the motor device 1 is provided with a motor unit 2 and a gear unit 3 (reduction unit).

[0019] The motor unit 2 is provided with a yoke housing 4 formed in a substantially cylindrical shape having a bottom. The yoke housing 4 has a peripheral surface including a pair of arcuate portions 4a and a pair of flat portions 4b. The flat portion 4a is arranged radially outwardly opposite the flat portion 4b. Such as figure 2 As shown, the motor unit 2 is also provided with a pair of magnets 5 and an armature 6 . The yoke housing 4 encloses the magnet 5 and the armature 6 therein. The yoke case 4 holds the magnet 5 on the inner surface of the arcuate portion 4b, and rotatably supports the armature 6 . The arcuate portions 4 a face each other in the width direction Dw of the motor unit 2 ,...

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PUM

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Abstract

The motor device (1) is provided with a yoke housing (4), a gear housing (41) and a brush holder (7). The receiving portion (51a) of the gear housing (41) receives therein the worm wheel (43) and the like. A brush holder (7) is provided between the yoke housing (4) and the gear housing (41). The worm wheel (43) is provided with a switching plate (54) on one surface, which is in sliding contact with the contact parts (31-33). The gear housing (41) is provided with a housing main body (51) and a cover (52). A communicating hole (51d) is formed in the housing main body (51) to communicate the receiving portion (51a) and the inner space of the yoke housing (4). The contact parts (31-33) are provided on the brush holder (7) and on the side of the bottom portion of the receiving portion (51a) opposite the worm wheel (43) to extend into the gear case (41) through the communication hole (51d) .

Description

technical field [0001] The invention relates to an electric machine arrangement with a rotational position detector, in particular an electric machine arrangement suitable for a wiper system of a vehicle. Background technique [0002] Conventionally, the motor device used has a motor unit provided with an armature and a gear unit provided with a reduction mechanism. In the reduction mechanism, the surface of the wheel gear is provided with a switching plate having a specific conductive pattern thereon, and the gear case of the gear unit is provided with a fixed terminal (see JP-060-44371-U for example) . In this type of motor device, the contact between the switching plate and the fixed terminal according to the rotational position of the gear is used as a switch detector, so that the motor device is suitable for, for example, a wiper motor. That is, this type of motor device is provided with a so-called automatic return-and-stop mechanism. When the wiper switch is turned...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/14
Inventor 八木秀幸
Owner DENSO CORP