Title:
WAVE GEAR DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/013190
Kind Code:
A1
Abstract:
This wave gear device is provided with: a non-circular cam which rotates about the center axis; a flexible ball bearing which is mounted on the outer circumferential surface of the non-circular cam and which has a radial length variable in the circumferential direction according to rotation of the non-circular cam; a flexible externally toothed gear which has a cylindrical shape extending in the axial direction, of which the lower end in the axial direction has an inner circumferential surface in contact with the outer circumferential surface of the ball bearing, and which has a plurality of external teeth provided at a certain pitch in the circumferential direction on the outer circumferential surface of the lower end in the axial direction; and an internally toothed gear that is disposed radially outside the flexible externally toothed gear, that includes inner teeth the number of which is different from the number of the plurality of external teeth, and that partially meshes with the flexible externally toothed gear. The outer circumferential surface of the ball bearing and the inner circumferential surface of the lower end of the flexible externally toothed gear are in surface contact with each other. A space is provided, in the contact portion, at a position facing, in the radial direction, a ball in the ball bearing.
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| JPH0647606 | TOOL CHUCK |
Inventors:
HAIZUMI KYOHEI (JP)
MIKI HIROSHI (JP)
MIKI HIROSHI (JP)
Application Number:
PCT/JP2018/025988
Publication Date:
January 17, 2019
Filing Date:
July 10, 2018
Export Citation:
Assignee:
NIDEC SHIMPO CORP (JP)
International Classes:
F16H1/32
Foreign References:
| JP2017110705A | 2017-06-22 | |||
| DE102015223419A1 | 2016-11-10 |
Attorney, Agent or Firm:
KOHO IP LAW (JP)
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