Title:
SLIDING-TYPE CONSTANT-VELOCITY JOINT
Document Type and Number:
WIPO Patent Application WO/2023/100522
Kind Code:
A1
Abstract:
A sliding-type constant-velocity joint 1, which is provided with an outer joint member 2, an inner joint member 3, a plurality of torque transmission balls 4 assembled between a plurality of linear track grooves 7 of the outer joint member 2 and a plurality of linear track grooves 9 of the inner joint member 3, and a cage 5 that accommodates the torque transmission balls 4 and has a spherical outer peripheral surface 11 and a spherical inner peripheral surface 12 that are contact-guided respectively by a cylindrical inner peripheral surface 6 of the outer joint member 2 and a spherical outer peripheral surface 8 of the inner joint member 3, and in which a curvature center O2 of the spherical outer peripheral surface 11 and a curvature center O1 of the spherical inner peripheral surface 12 of the cage 5 are offset to opposite sides with respect to a joint center O in the axial direction, is characterized in that: the curvature center O1 of the spherical inner peripheral surface 12 of the cage 5 is set to exactly coincide with a curvature center O1 of the spherical outer peripheral surface 8 of the inner joint member 3, a curvature radius RCI of the spherical inner peripheral surface 12 of the cage 5 is set to substantially coincide with a curvature radius RI of the spherical outer peripheral surface 8 of the inner joint member 3, and thus a spherical surface gap δ to enable contact-guiding is formed between the spherical inner peripheral surface 12 of the cage 5 and the spherical outer peripheral surface 8 of the inner joint member 3; and when this sliding-type constant-velocity joint takes an operating angle θ, the spherical inner peripheral surface 12 of the cage 5 and the spherical outer peripheral surface 8 of the inner joint member 3 are in surface-contact with each other on an end side of the spherical inner peripheral surface 12 of the cage 5.
Inventors:
KOBAYASHI MASAZUMI (JP)
KOBAYASHI TOMOSHIGE (JP)
SUGIYAMA TATSURO (JP)
KOBAYASHI TOMOSHIGE (JP)
SUGIYAMA TATSURO (JP)
Application Number:
PCT/JP2022/039337
Publication Date:
June 08, 2023
Filing Date:
October 21, 2022
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16D3/227; F16D3/2245
Foreign References:
| JPS5776323A | 1982-05-13 | |||
| JPS632665Y2 | 1988-01-22 | |||
| JPH0351519A | 1991-03-05 | |||
| JP2013231518A | 2013-11-14 | |||
| JPH03277822A | 1991-12-09 | |||
| JPH03255226A | 1991-11-14 | |||
| JPH09280261A | 1997-10-28 |
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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