Title:
TRIPOD-TYPE CONSTANT-VELOCITY UNIVERSAL JOINT
Document Type and Number:
WIPO Patent Application WO/2023/068018
Kind Code:
A1
Abstract:
A tripod-type constant-velocity universal joint 1 is provided with: an outside joint member 2 having formed therein three track grooves 5 each having roller guide surfaces 6 disposed so as to face each other in the circumferential direction; a tripod member 3 having three leg shafts 7 protruding in radial directions; and torque transmission members 4, 11 that have rollers 11 rollably fitted in the respective track grooves 5 in the outside joint member 2 and are supported on the leg shafts 7. The tripod-type constant-velocity universal joint is characterized in that: a central range W is defined in a range 10 mm to the depth side and 10 mm to the opening side with respect to a slide range central portion C of each of the track grooves in the joint axial direction; the central range W has formed therein a section 6a where a track length L, which is a width dimension between the roller guide surfaces 6, is minimum; track clearances δ are formed between the roller guide surfaces and the outer circumferential surface of the corresponding roller 11 in the central range W, the minimum value δmin of the track clearances δ of the three track grooves 5 in the central ranges W is set to 0.010-0.100 mm, and the mutual difference in the track lengths L of the three track grooves 5 in the central ranges W is set not more than 0.150 mm.
Inventors:
ITAGAKI TAKU (JP)
SUGIYAMA TATSURO (JP)
KAWATA SHOTA (JP)
SUGIYAMA TATSURO (JP)
KAWATA SHOTA (JP)
Application Number:
PCT/JP2022/036825
Publication Date:
April 27, 2023
Filing Date:
September 30, 2022
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16D3/20; F16D3/205
Foreign References:
| JP2000179565A | 2000-06-27 | |||
| JPH03292418A | 1991-12-24 | |||
| JP2018071757A | 2018-05-10 | |||
| JP2001132766A | 2001-05-18 |
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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