Title:
ELECTRICALLY OPERATED BRAKE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/073750
Kind Code:
A1
Abstract:
This electrically operated brake device has: a speed reduction mechanism for transmitting the rotational force of an electric motor; a ball screw mechanism for converting the rotational force of the speed reduction mechanism into thrust force; a piston driven by the ball screw mechanism; and a caliper for supporting the piston in a movable manner. The ball screw mechanism is configured such that a base nut is supported so as to be incapable of rotating relative to the caliper, and a push rod which receives rotational force from the speed reduction mechanism is movable in the axial direction of the push rod relative to the base nut. As a result, the axial length of the cylinder section of the caliper body can be reduced to achieve compactness. Consequently, the easiness of mounting of the electrically operated brake device 1 on a vehicle can be improved.
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Inventors:
ODAIRA ATSUSHI (JP)
Application Number:
PCT/JP2018/034326
Publication Date:
April 18, 2019
Filing Date:
September 18, 2018
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
B60T13/74; F16D65/18; F16D65/74; F16D121/24; F16D125/40; F16D125/46
Foreign References:
| JP2013071642A | 2013-04-22 | |||
| JP2017155774A | 2017-09-07 | |||
| JP2016125535A | 2016-07-11 |
Attorney, Agent or Firm:
ONO, Shinjiro et al. (JP)
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