Motor

• US 10,128,721 B2
• Filed: 11/23/2015
• Issued: 11/13/2018
• Est. Priority Date: 11/28/2014
• Status: Active Grant

• Current Assignee: Nidec Corporation
• Original Assignee: Nidec Corporation
• Inventors: Hotori, Tadashi, Yasuda, Yusuke
• Primary Examiner(s): Luks, Jeremy
• Application Number:
  US14/948,858
• Publication Number:
  US 20160156246A1
• Time in Patent Office: 1,086 Days
• Field of Search: 310 71
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 2205/09 Machines characterised by drain passages or by venting, breathing or pressure compensating means
• CPC Class Codes: H02K 5/124 Sealing of shafts
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

A motor may include a motor body portion; a connector portion disposed to the motor body portion; and a wiring member electrically connected to the motor body portion. The connector portion has a surface exposed to an outside of the motor body portion. The wiring member includes a plurality of external connection terminals which are connected to the external power supply to protrude from the exposed surface of the connector part. The connector portion is provided with a through hole which extends from the exposed surface toward the accommodating space and connects the outside of the motor body portion and the accommodating space. When viewed in the normal direction of the exposed surface, at least a portion of the through hole is positioned inside an edge of an external connection terminal group which consists of the plurality of external connection terminals.

Claims

1. A motor, comprising:

a motor body portion comprising;

a rotor having a shaft which has a center on a center axis extending in one direction;

a stator enclosing the rotor and structured to rotate the rotor about the center axis;

a first bearing which is disposed at a first side in the one direction of the stator and supports the shaft;

a second bearing which is disposed at a second side opposite to the first side of the stator and supports the shaft; and

a housing having an accommodating space for accommodating the rotor, the stator, the first bearing, and the second bearing;

a connector portion disposed to the motor body portion; and

a wiring member electrically connected to the motor body portion,

wherein the connector portion has an exposed surface which is exposed to an outside of the motor body portion,

the wiring member includes a plurality of external connection terminals which are connected to an external power supply and protrude from the exposed surface of the connector portion,

the connector portion is provided with a through hole which extends from the exposed surface toward the accommodating space and allows the outside of the motor body portion and the accommodating space to be communicated with each other,

when viewing the exposed surface from a normal direction, at least a portion of the through hole is positioned inside an outer edge of an external connection terminal group configured of the plurality of external connection terminals;

a cross-sectional shape of the through hole in a direction orthogonal to a direction in which the through hole extends is different from a cross-sectional shape of the external connection terminal.

2. The motor of claim 1,

wherein when viewing the exposed surface from the normal direction, the whole through hole is positioned inside the outer edge of the external connection terminal group.

3. The motor of claim 1,

wherein the through hole has a narrow width portion disposed on the motor body portion side of the connector portion, and

a cross-sectional area of the narrow width portion is smaller than an opened area of the through hole in the exposed surface.

4. The motor of claim 1,

wherein the through hole has an inside opening opened in the accommodating space, and the motor body portion has a convex portion facing the inside opening.

5. The motor of claim 1,

wherein the motor body portion has a circuit board disposed on the second side behind the second bearing,

the through hole has an inside opening which is open toward the accommodating space, and

the inside opening is positioned closer to the first side than the circuit board in a direction of the center axis.

6. The motor of claim 1,

wherein the connector portion is molded by making resin flow into a mold.

7. The motor of claim 6,

wherein the connector portion is formed by insert molding and inserting the wiring member into the mold.

8. The motor of claim 6,

wherein the mold has a mold pin molding a mold body portion and the through hole,

the mold pin is a separate member from the mold body portion,

the mold body portion has a concave portion at a surface orthogonal to a direction in which the mold pin extends, and

the mold pin is inserted into the concave portion.

9. The motor of claim 8,

wherein the mold pin is removed from the mold body portion.