Mounting structure of ground ring of motor

Patent metadata

Field	Value
Publication number	US-12587073-B2
Application number	US-202318375678-A
Country	US
Kind code	B2
Filing date	Oct 2, 2023
Priority date	Oct 18, 2022
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

Provided is a mounting structure of a shaft ground ring of a motor in which a second contact part of the ground ring is inserted into a hole positioned in a rotating shaft, thus making the ground ring be in contact with an inner circumferential surface of the rotating shaft to transfer an axial current occurring in a rotor to a motor housing.

First claim

What is claimed is:

1 . A mounting structure of a ground ring of a motor, the mounting structure comprising:
a motor housing including a stator having a core on which a coil is wound and a rotor having a permanent magnet; a rotating shaft coupled to the rotor, supported by a bearing to be rotated in the motor housing, and having a hollow shape in which a hole passes through an inside thereof; and a ground ring including a first contact part electrically connected to the motor housing and a second contact part in contact with the rotating shaft, and transferring an axial current occurring in the rotor to the motor housing, wherein the ground ring has the first contact part coupled to one end of the rotating shaft in a length direction and the second contact part inserted into the hole of the rotating shaft, wherein the first contact part is a base plate, and the second contact part includes a first protruding piece coupled to one surface of the base plate that faces the hole of the rotating shaft and protruding toward the hole, and a second protruding piece coupled to the first protruding piece and extending toward an inner circumferential surface of the rotating shaft to be in contact with the inner circumferential surface of the rotating shaft, wherein a first protruding piece is twisted.

2 . The mounting structure of claim 1 , wherein the second protruding piece is provided in plural, and the plurality of second protruding pieces are coupled with the first protruding piece.

3 . The mounting structure of claim 2 , wherein each of the plurality of second protruding pieces is made of a carbon fiber.

4 . The mounting structure of claim 3 , wherein the first protruding piece is made of a wire, and
the plurality of carbon fibers of the plurality of second protruding pieces are coupled to the wire in a spiral shape.

Assignees

• Hyundai Mobis Co Ltd

Inventors

• Kim Goon Chul

Classifications

• H01R4/66

  Connections with the terrestrial mass, e.g. earth plate, earth pin · CPC title

• H02K7/003

  Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28) · CPC title

• H02K11/012

  Shields associated with rotating parts, e.g. rotor cores or rotary shafts · CPC title

• H02K11/40 Primary

  Structural association with grounding devices · CPC title