ACTUATOR

WIPO Patent Application WO/2021/085603

A1

Provided is an actuator with which the rotational speed of an output shaft can be increased, and with which the output torque can be maintained even if the rotational speed is increased. A pressing force applying means for causing a nutation angular bevel gear (4) to perform a whirling motion is provided on a side plate (2c). The pressing force applying means comprises an elastic membrane member (12), a fluid chamber (13), a passage (14), and a fluid supply means. The elastic membrane member (12) is disposed on an inside surface of the side plate (2c) facing a pressure receiving surface (4c) of a gear main body (4a), and includes an annular outer ring portion (12a) and a flat plate portion (12b) formed integrally in the shape of a container, and the fluid chamber (13) is configured between the side plate (2c) and the elastic membrane member (12). An outer surface of the flat plate portion (12b) faces the pressure receiving surface (4c) in a position farther from the pressure receiving surface (4c) than a protruding end of the outer ring portion (12a), and an inner surface thereof faces a fluid blow-out port of the passage (14). The outer ring portion (12a) of the elastic membrane member (12) presses the pressure receiving surface (4c), and the flat plate portion (12b) warps backwards to a position closer to the pressure receiving surface (4c) than the protruding end of the outer ring portion (12a), and presses the pressure receiving surface (4c).

UZUKA KAZUO (JP)
TSUCHIYA TAIKI (JP)
KIMURA YOICHI (JP)

PCT/JP2020/040819

May 06, 2021

October 30, 2020

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TOK INC (JP)

F16H1/32

JP2002317858A	2002-10-31
JP2006112618A	2006-04-27
JP2014047797A	2014-03-17
JP2015169594A	2015-09-28

MINEGISHI Takeshi (JP)

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