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Title:
DISC BRAKE
Document Type and Number:
WIPO Patent Application WO/2018/003393
Kind Code:
A1
Abstract:
Provided is a disc brake that has a simple structure with few components and improves reliability. The disc brake comprises a piston propulsion mechanism. The piston propulsion mechanism comprises: an input member that is positioned extending toward a protrusion direction of a piston within a cylinder, has a threaded part formed on the circumferential surface thereof, and rotates with a torque from an electric motor being transferred thereto; a cylindrical rotary/linear member that has an engaging threaded part that engages with the threaded part of the input member, moves in the axial direction of the cylinder due to a rotation of the input member, and transmits torque from the electric motor to the piston; a cylindrical support member that is supported by a caliper main body so as not to be rotatable and is positioned further to the outside in the radial direction than the rotary/linear member; and a rolling body that is positioned between the support member and the rotary/linear member so as to be engaged with the support member and the rotary/linear member, imparts a rotational resistance to the rotary/linear member when the rotary/linear member rotates due to a rotation of the input member, and causes the rotary/linear member to move linearly while causing the same to rotate relative to the input member.

Inventors:
SAKASHITA, Takayasu (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
JP2017/020402
Publication Date:
January 04, 2018
Filing Date:
June 01, 2017
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
B60T13/74; F16D65/18; F16D121/24; F16D125/40
Foreign References:
JP2014214830A2014-11-17
JP2003083373A2003-03-19
JP2015056999A2015-03-23
Attorney, Agent or Firm:
ONO, Shinjiro et al. (YUASA AND HARA, Section 206 New Ohtemachi Bldg., 2-1, Ohtemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
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