TRANSMISSION DEVICE AND VEHICLE STEERING APPARATUS USING SAME

WIPO Patent Application WO/2020/202270

A1

A transmission device (1) includes: a screw shaft (20) housed in a cylindrical housing (2); a plurality of balls (30) located in a rollable manner on a screw part (22) of the screw shaft (20); a nut (40) coupled to the screw part (22) with the plurality of balls (30); and a bearing (50) that rotatably supports the nut (40) inside the housing (2). The nut (40) has: a major diameter part (44); and a minor diameter part (45) contiguous to the major diameter part (44) in the axial direction of the screw shaft (20). The major diameter part (44) has a circulation section (70) on the outer circumferential surface (44a) thereof. The circulation section (70) causes circulation therethrough of the plurality of balls (30) that roll on the screw part (22). The minor diameter part (45) has a smaller diameter than the major diameter part (44). The bearing (50) supports the minor diameter part (45) in the nut (40).

JP2956011	INDUSTRIAL APPLICABILITY: An object moving device and a seat chair with an automatic lifting device using the object moving device.
JP2003301921	STRUCTURE OF FIXING SEAL MEMBER OF BALL SCREW

ENOMOTO SATOSHI (JP)
MORI HIROAKI (JP)

PCT/JP2019/014056

October 08, 2020

March 29, 2019

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SHOWA CORP (JP)

F16H25/24; F16H25/22

JP2015047997A	2015-03-16
JP2017159793A	2017-09-14
JP2016133152A	2016-07-25
JP2005263149A	2005-09-29

SHIMODA, Yo-ichiro et al. (JP)

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