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Patent Searching and Data


Title:
MOTION CONVERSION DEVICE AND ELECTRIC BRAKE ACTUATOR HAVING THE SAME
Document Type and Number:
Japanese Patent JP2020133693
Kind Code:
A
Abstract:
To provide a motion conversion device which is comparatively high in efficiency and rigidity, and comparatively low in a cost.SOLUTION: In a motion conversion mechanism 50 including a shaft body 48 at which male screws are formed, and a cylinder body 78 formed with female screws screwed with the male screws, and converting a rotation motion of either of the shaft body and the cylinder body to a linear motion of the other of the shaft body and the cylinder body, two female screw parts 78b, 78c formed with the female screws, respectively, are arranged at the cylinder body with a non-screwed part 78d not formed with the female screws sandwiched therebetween in an axial line direction. A distance between the most separated two female screws in the axial line direction can be elongated in the axial line direction out of threads of the engaged female screws while comparatively reducing the number of the threads of the female screws of the cylinder body which are engaged with the male screws of the shaft body. As a result, a motion conversion mechanism which is comparatively low in a processing cost, and comparatively high in efficiency and rigidity can be obtained. The motion conversion mechanism is suitable for an electric brake actuator.SELECTED DRAWING: Figure 6

Inventors:
NANAHARA MASATERU
Application Number:
JP2019024627A
Publication Date:
August 31, 2020
Filing Date:
February 14, 2019
Export Citation:
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Assignee:
TOYOTA MOTOR CORP
International Classes:
F16H25/24; B60T13/74; F16D65/18; F16H25/20
Domestic Patent References:
JPH094691A1997-01-07
JPS5061273U1975-06-05
JPH0723846U1995-05-02
JPS58166162A1983-10-01
JPS52154586U1977-11-24
Foreign References:
US20160341302A12016-11-24
US20170356514A12017-12-14
Attorney, Agent or Firm:
Chubu International Patent Office