Title:
WORM SPEED REDUCER
Document Type and Number:
WIPO Patent Application WO/2017/002393
Kind Code:
A1
Abstract:
A pair of wedge-shaped pieces (24, 24) is provided so as to fill a ring-shaped space (34), which exists between the inner circumferential surface of a holding recess (21) and the outer circumferential surface of a bearing holder (22), at two locations of said ring-shaped space (34) that are symmetric with respect to an imaginary plane (α), which comprises the section where a worm wheel (13) meshes worm teeth (17) and the central axis of the worm (14). Elastic forces are applied on the two wedge-shaped pieces (24, 24) in the circumferential direction away from the meshing section. In a worm speed reducer provided with a biasing means for elastically biasing the worm teeth toward the worm wheel, it is thereby possible to prevent displacement of the distal end of the worm in a direction perpendicular to the biasing direction.
Inventors:
SEGAWA TORU (JP)
Application Number:
PCT/JP2016/055534
Publication Date:
January 05, 2017
Filing Date:
February 24, 2016
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16H1/16; B62D5/04; F16C23/06
Foreign References:
| JP2013087868A | 2013-05-13 | |||
| JP2014185728A | 2014-10-02 | |||
| JP2012106580A | 2012-06-07 |
Other References:
See also references of EP 3315817A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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