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Patent Searching and Data


Title:
ELECTRIC BOOSTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/003943
Kind Code:
A1
Abstract:
[Problem] To provide an electric booster device with which a reduction in size can be achieved. [Solution] In this electric booster device 1, a main bearing 150 which supports a nut member 145 of a rotation-linear motion conversion mechanism 6, accepts a load in the direction of an axis of rotation from the nut member 145 and transmits said load to a housing 3 is disposed on a master cylinder 15 side of first and second engaging portions 158, 159. As a result, since a hydraulic reaction force from the master cylinder 15 acts as a load in a pulling direction in the axial direction relative to the main bearing 150, even if an unbalance load acts on the main bearing 150, a moment in a direction inclined with respect to the axial direction acts on the main bearing 150 in a reducing direction, and therefore the unbalance load accepted by the bearing 150 can be reduced. The size of the main bearing 150 can thus be reduced, in turn making it possible to achieve a reduction in the size of the electric booster device 1.

Inventors:
YOSHIZU RIKIYA (JP)
NOMURA DAICHI (JP)
SHIGETA HIROSHI (JP)
Application Number:
PCT/JP2018/022752
Publication Date:
January 03, 2019
Filing Date:
June 14, 2018
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
B60T13/74; F16C19/16; F16C35/067
Foreign References:
JP2012111458A2012-06-14
Attorney, Agent or Firm:
HANABUSA PATENT & TRADEMARK OFFICE (JP)
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