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Title:
ELECTRIC BRAKE DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/002150
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an electric brake device that is capable of suppressing bending deformation caused in a component while maintaining a contact state between a lock nut and a piston and while allowing axial deviation with the piston. The present invention is provided with: a piston 7 making contact with a brake pad 8; a screw shaft 5 for transmitting the rotation of an electric motor 4; and a lock nut 6 that is provided inside the piston 7, moves by the rotation of the screw shaft 5, and press the piston 7. The lock nut 6 has: a pressing section 6a for pressing the piston 7; a screw cylindrical section 6b screwed to the screw shaft 5; and an intermediate section 6c positioned between the pressing section 6a and the screw cylindrical section 6b. In the intermediate section 6c, an elastic deformation section 23 is formed that has smaller stiffness than other portions of the lock nut 6.

Inventors:
OGATA MASATOSHI (JP)
ONO MASAHIKO (JP)
OONO KOUSAKU (JP)
TANIE HISASHI (JP)
Application Number:
PCT/JP2020/022515
Publication Date:
January 07, 2021
Filing Date:
June 08, 2020
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F16H25/24; B60T13/74; F16D65/18; F16D121/24; F16D125/06; F16D125/40
Domestic Patent References:
WO2018003393A12018-01-04
Foreign References:
JP2019060399A2019-04-18
JP2015044424A2015-03-12
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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