Motor with potting section and hole provided with cap through which winding is inserted

Patent metadata

Field	Value
Publication number	US-11088585-B2
Application number	US-201716082540-A
Country	US
Kind code	B2
Filing date	Mar 6, 2017
Priority date	Mar 9, 2016
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A motor unit includes a stator including a coil formed from a wound winding that is configured by a conductive member including an insulating covering layer on the surface of the conductive member, a rotor that rotates under the influence of a rotating magnetic field generated by the stator, and a centerpiece that supports the stator and is formed with a centerpiece-side winding insertion hole through which the winding is inserted. The motor unit also includes a circuit device and a potting section. The potting section is formed using potting material, and seals a gap formed between the centerpiece-side winding insertion hole and the winding by achieving a state in which a portion of the potting section is closely adhered to the covering layer of the winding.

First claim

The invention claimed is:

1. A motor comprising:
a stator comprising a coil formed from a wound winding that is configured by a conductive member including an insulating covering layer on the surface of the conductive member;
a rotor that rotates under the influence of a rotating magnetic field generated by the stator;
a centerpiece that supports the stator, the centerpiece being formed with a centerpiece-side winding insertion hole through which the winding is inserted;
a circuit device that is disposed on an opposite side of the centerpiece to a side on which the stator is fixed, the circuit device including a connection portion to which the winding is connected after having passed through the centerpiece-side winding insertion hole, and controlling current flow to the winding; and
a potting section that is formed using potting material, the potting section sealing a gap formed between the centerpiece-side winding insertion hole and the winding by achieving a state in which a first portion of the potting section is closely adhered to the covering layer of the winding, wherein
an insulating cap is provided between the centerpiece-side winding insertion hole and the winding, and a cap-side winding insertion hole through which the winding is inserted is formed in the insulating cap,
a circuit-device-side portion of the cap-side winding insertion hole has an inner diameter larger than an inner diameter of the cap-side winding insertion hole at a central portion in a rotation axis direction of the rotor such that a concave portion which opens toward a circuit-device-side is formed at a circuit-device-side portion of the insulating cap,
the potting section is provided on the circuit-device-side of the centerpiece, and
an inner side of the concave portion is filled with a second portion of the potting section.

2. The motor of claim 1 , wherein:
a plurality of the centerpiece-side winding insertion holes are formed in the centerpiece; and
each gap formed between the plurality of the centerpiece-side winding insertion holes and the respective windings inserted through the plurality of respective centerpiece-side winding insertion holes is sealed by the single potting section.

3. The motor of claim 1 , wherein
a stator-side portion of the cap-side winding insertion hole has an inner diameter that becomes smaller on progression from the stator side to the circuit device side.

4. The motor of claim 1 , wherein:
a recess is formed in the centerpiece so as to open toward one side in a rotation axis direction of the rotor; and
the centerpiece-side winding insertion hole is formed in a bottom of the recess.

5. The motor of claim 4 , wherein a plurality of the centerpiece-side winding insertion holes are formed in the bottom of the single recess.

Assignees

• Denso Corp

Inventors

• Ikeda Shinji
• Nagaya Takumi
• Takagi Tatsuya
• Matsumoto Kuniaki
• Hosotani Kazuhiro
• Yagi Yutaro
• Suga Yoshihiko
• Matsumoto Takuya
• Hiraoka Shunichi

Classifications

• H02K15/32

  Manufacture of terminal arrangements; Connecting the terminals to external circuits · CPC title

• H02K15/22

  Shaping or compacting conductors in slots or around salient poles (H02K15/28 takes precedence) · CPC title

• H02K1/2788

  the rotor consisting of a single magnet or two or more axially juxtaposed single magnets · CPC title

• H02K3/38 Primary

  around winding heads, equalising connectors, or connections thereto · CPC title

• H02K5/10 Primary

  with arrangements for protection from ingress, e.g. water or fingers · CPC title