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Patent Searching and Data


Title:
DRIVE MOTOR HAVING ELECTROMAGNETIC BRAKE
Document Type and Number:
WIPO Patent Application WO/2020/118791
Kind Code:
A1
Abstract:
A drive motor having an electromagnetic brake, comprising a motor shell (1), a drive shaft (2), and an electromagnetic brake (3). The electromagnetic brake (3) comprises a housing (3-1), fixed magnetic pieces (3-2), and movable magnets (3-3). An annular embedding groove (3-11) is provided in the housing (3-1). The fixed magnetic pieces (3-2) and the movable magnets (3-3) are circumferentially and evenly arranged in the annular embedding groove (3-11). The movable magnets (3-3) comprise cylindrical iron cores (3-31), brakes (3-32), and electrified coils (3-33) winding on the outer sides of the iron cores. The inner side surfaces of the brakes (3-32) with respect to the annular embedding groove (3-11) are axially provided with chamfers. A conical hole structure is formed among the plurality of iron cores (3-31). The electrified coils (3-33) are connected to a storage battery (4) of an electric vehicle. In the case that the Ay (4) is electrified, the iron cores (3-31) and the fixed magnetic pieces (3-2) generate a same magnetic field and repel each other, and thus do not brake the drive shaft (2). When a relay switch (5) is in an off state, the electrified coils (3-33) lose power, the iron cores (3-31) move forward under the attraction of the fixed magnetic pieces (3-2) and the action of a spring (3-34), a conical hole of the brakes (3-32) presses the drive shaft (2) to stop same, thereby implementing a braking function. The drive motor can implement automatic power-off braking, thereby effectively preventing the occurrence of slipping when a vehicle stops.

Inventors:
TENG YISONG (CN)
XIE XIUBIN (CN)
FAN XIANGXIN (CN)
LI SHA (CN)
ZHANG LIJUAN (CN)
TENG WUDI (CN)
Application Number:
CN2018/124845
Publication Date:
June 18, 2020
Filing Date:
December 28, 2018
Export Citation:
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Assignee:
XUZHOU NANPU ELECTROMECHAINICAL TECH CO LTD (CN)
International Classes:
B60L7/24
Foreign References:
CN108019447A2018-05-11
CN2589749Y2003-12-03
CN201309425Y2009-09-16
DE10029778A12002-01-03
JPS5460651A1979-05-16
Attorney, Agent or Firm:
NANJING ZONGHENG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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