Title:
ROTOR STRUCTURE FOR IMPROVING COOLING FUNCTION OF DRIVE MOTOR
Document Type and Number:
WIPO Patent Application WO/2021/091157
Kind Code:
A1
Abstract:
The present invention relates to a rotor structure for improving the cooling function of a drive motor, in which a rotating shaft of a rotor for the drive motor is divided into two sections having different outer and inner diameters on the basis of the longitudinal direction thereof, and a rotor core in a section having relatively large outer and inner diameters is installed such that a cooling flow path in an area where a cooling action is largely exhibited is further expanded, and a cooling flow path in an area where the cooling action is exhibited in a relatively small manner is further reduced so as to improve the overall cooling function and efficiency of the rotor, and at the same time, to this end, a cooling fluid in the rotating shaft is able to be supplied and discharged smoothly without stagnation and clogging. The rotor structure for improving the cooling function of the drive motor according to the present invention comprises: a rotating shaft which is hollow and has one end that is closed and the other end that is open in the longitudinal direction thereof, and comprises a first space portion which is adjacent to the closed one end and, at the same time, has an inner space having a relatively large diameter, and a second space portion which has a relatively small diameter and, at the same time, is adjacent to the open other end; and a rotor core which is joined to an outer surface corresponding to the first space portion of the rotating shaft. The rotor structure is composed in a manner such that a leading-in end of a cooling fluid supply pipe, which is led into the inner space of the rotating shaft through the open other end of the rotating shaft, is led into a position beyond the middle of the first space portion.
Inventors:
RYU YOUNG HYEN (KR)
Application Number:
PCT/KR2020/014860
Publication Date:
May 14, 2021
Filing Date:
October 29, 2020
Export Citation:
Assignee:
SONGUO MOTORS CO LTD (KR)
International Classes:
H02K1/32; H02K7/00; H02K9/19
Foreign References:
| JP2012524514A | 2012-10-11 | |||
| JP2003235210A | 2003-08-22 | |||
| JP2015091198A | 2015-05-11 | |||
| KR20180088444A | 2018-08-03 | |||
| KR20190015509A | 2019-02-13 |
Attorney, Agent or Firm:
KIM, Yeong Il (KR)
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