BRUSHLESS WIPER MOTOR - MITSUBA CORP

Title:

BRUSHLESS WIPER MOTOR

Document Type and Number:

WIPO Patent Application WO/2016/010021

Kind Code:

A1

Abstract:

In the present invention, a rotor (33) is provided able to rotate at the inside of a stator (32) provided with a coil (32b), one end side in the axial direction of a rotating shaft (34) is affixed to the center of the rotor (33), the other end side in the axial direction of the rotating shaft (34) is provided with a worm (35), the one end side in the axial direction and the other end side in the axial direction of the worm (35) of the rotating shaft (34) are respectively provided with a first and second ball bearing (36, 37), the rotating shaft (34) is rotatably supported only by the first and second ball bearings (36, 37), and with respect to the position of the first ball bearing (36), the length in the axial direction to the second ball bearing (37) is longer than the length in the axial direction to the rotor (33). A commutator or the like does not need to be provided to the free end portion of the rotating shaft (34) and so the rotating shaft (34) can be shortened to reduce the inertial mass of the free end section. Noise is reduced while causing stable operation in an electric power conserving manner. It is possible to suppress the generation of electrical noise, and it is possible to be maintenance free.

Inventors:

SHODA HIROKAZU (JP)
ISO YUKIYOSHI (JP)
NAKAMURA OSAMU (JP)

Application Number:

PCT/JP2015/070110

Publication Date:

January 21, 2016

Filing Date:

July 14, 2015

Export Citation:

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Assignee:

MITSUBA CORP (JP)

International Classes:

H02K7/116; B60S1/08; H02K29/08

Domestic Patent References:

WO2008117728A1

2008-10-02

Foreign References:

US20130015739A1	2013-01-17
JP2013538744A	2013-10-17
JP2005168099A	2005-06-23
JP2000500102A	2000-01-11
JP2008253049A	2008-10-16
JP2011244562A	2011-12-01

Other References: