公开(公告)号：US11828327B2

公开(公告)日：2023-11-28

申请号：US17089276

申请日：2020-11-04

Applicant: Jing-Jin Electric Technologies Co., Ltd.

Inventor： Ping Yu ,  Zhenjun Zhang ,  Zhe Feng ,  Kunxing Sun ,  Li Liu

IPC: F16C3/02 ,  H02K7/00 ,  H02K9/19

CPC classification number: F16C3/02 ,  H02K7/003 ,  H02K9/19 ,  F16C2380/26

Abstract: The present disclosure discloses an electric-machine shaft, wherein the electric-machine shaft is provided with a hollow structure in an axial direction at least one end, and the hollow structure is, at a position close to the end, provided with a coolant pumping mechanism having a spiral groove, so that the coolant is able to enter the hollow structure by an attractive force generated by rotation of the electric-machine shaft; the spiral groove is provided on an inner surface of an annular member, the annular member is fixedly mounted to the hollow structure, or the spiral groove is directly provided on an inner surface of the hollow structure; and the electric-machine shaft is provided with a plurality of groups of coolant channels in an axial direction, the coolant channels are in communication with the hollow structure, and when the electric-machine shaft is rotating, oil liquid inside the hollow structure is thrown out by the coolant channels, to cool components inside an electric-machine housing. In the present disclosure, by providing the hollow structure and the coolant pumping mechanism, a structure similar to a pump is formed, and when the electric-machine shaft is rotating, the coolant can be attracted into the hollow structure, and then be thrown out by the coolant channels, which realizes the cooling and lubrication of the components inside the electric-machine housing, and improves the capacity of heat dissipation of the electric machine.

公开(公告)号：US20220069671A1

公开(公告)日：2022-03-03

申请号：US17089276

申请日：2020-11-04

Applicant: Jing-Jin Electric Technologies Co., Ltd.

Inventor： Ping Yu ,  Zhenjun Zhang ,  Zhe Feng ,  Kunxing Sun ,  Li Liu

IPC: H02K9/19 ,  F16C3/02 ,  H02K7/00

Abstract: The present disclosure discloses an electric-machine shaft, wherein the electric-machine shaft is provided with a hollow structure in an axial direction at least one end, and the hollow structure is, at a position close to the end, provided with a coolant pumping mechanism having a spiral groove, so that the coolant is able to enter the hollow structure by an attractive force generated by rotation of the electric-machine shaft; the spiral groove is provided on an inner surface of an annular member, the annular member is fixedly mounted to the hollow structure, or the spiral groove is directly provided on an inner surface of the hollow structure; and the electric-machine shaft is provided with a plurality of groups of coolant channels in an axial direction, the coolant channels are in communication with the hollow structure, and when the electric-machine shaft is rotating, oil liquid inside the hollow structure is thrown out by the coolant channels, to cool components inside an electric-machine housing. In the present disclosure, by providing the hollow structure and the coolant pumping mechanism, a structure similar to a pump is formed, and when the electric-machine shaft is rotating, the coolant can be attracted into the hollow structure, and then be thrown out by the coolant channels, which realizes the cooling and lubrication of the components inside the electric-machine housing, and improves the capacity of heat dissipation of the electric machine.