Driving apparatus

Patent metadata

Field	Value
Publication number	US-10630141-B2
Application number	US-201615543640-A
Country	US
Kind code	B2
Filing date	Jan 8, 2016
Priority date	Jan 19, 2015
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

In a driving apparatus (10) in which a position of a rotating shaft (27) of an electric motor (16) in a direction of an axis (B1) is determined, the driving apparatus (10) has: a stopper (77) which determines a position of the rotating shaft (27) in the direction of the axis (B1), and a terminal holder (31) which holds a first terminal for supplying an electric current to the electric motor (16), wherein a layout region of the stopper (77) in the direction of the axis (B1) and a layout region of the terminal holder (31) in the direction of the axis (B1) are overlapped with each other.

First claim

What is claimed is:

1. A driving apparatus in which a position of a rotating shaft of an electric motor in an axis direction is determined, the driving apparatus comprising:
a positioning member which determines a position of the rotating shaft in the axis direction;
a terminal holder which holds a first terminal for supplying an electric current to the electric motor;
a gear case in which the rotating shaft is housed;
a bearing disposed inside the gear case, the bearing rotatably supporting the rotating shaft;
a worm formed on the rotating shaft;
a worm wheel rotatably disposed in the gear case, the worm wheel having a worm gear which is meshed with the worm;
a cover which covers an opening of the gear case;
a control board supported by the cover, the control board having installed thereon electric parts which control the electric motor; and
a second terminal attached to the control board and connected to the first terminal,
wherein a layout region of the positioning member in the axis direction and a layout region of the terminal holder in the axis direction are overlapped with each other,
the positioning member is made in contact with the bearing and the gear case to determine the position of the rotating shaft in the axis direction,
a load receiving mechanism is installed inside the gear case, and receives a load which is applied to the terminal holder when the first terminal and the second terminal are connected to each other, and
the load receiving mechanism is the positioning member.

2. The driving apparatus according to claim 1 , wherein the electric motor comprises:
a stator having a coil connected to the first terminal; and
a rotor attached to the rotating shaft, and forming a rotating magnetic field together with the stator.

3. The driving apparatus according to claim 1 , wherein
the load receiving mechanism is a mount which protrudes from an inner surface of the gear case.

4. The driving apparatus according to claim 1 , wherein
the second terminal protrudes in the axis direction from an edge of the control board, and
a sensor for detecting a rotation phase of the rotating shaft is installed on the control board.

5. The driving apparatus according to claim 1 , further comprising:
an output shaft which is connected to a wiper arm, and rotated with the worm wheel.

6. The driving apparatus according to claim 1 , wherein
the electric motor is a brushless motor.

Assignees

• Mitsuba Corp

Inventors

• Iso Yukiyoshi

Classifications

• H02K7/1166 Primary

  comprising worm and worm-wheel (structural association with bearings specially adapted for worm gear drives H02K7/081) · CPC title

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• B60S1/08

  electrically driven {(conjoint control of windscreen wiper motor and liquid supply of windscreen washer B60S1/482; conjoint control of windscreen wiper motor and means for cleaning parts o parts other than windscreens or front windows B60S1/56, B60S1/58, B60S1/606)} · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• B60S1/0807

  using electronic control means, e.g. tubes, semiconductors (B60S1/0818, B60S1/0896 take precedence) · CPC title