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Title:
TRIPOD TYPE CONSTANT VELOCITY UNIVERSAL JOINT
Document Type and Number:
WIPO Patent Application WO/2005/042994
Kind Code:
A1
Abstract:
A tripod type constant velocity universal joint enabling a remarkable reduction in the quantity of parts and man-hour for assembly by eliminating rolling elements such as needle rollers and capable of preventing, by excellent rolling characteristics of a roller, NVH performance from being impaired. The contour shape of the outer diameter surface of the trunnion journal of the tripod type constant velocity universal joint is formed in a non-circular shape, and a contact position between the outer diameter surface of the trunnion journal and the inner diameter surface of the roller directly fitted to the outer diameter surface of the trunnion journal is shifted from a perpendicular suspended from the center of the trunnion journal to the track groove of an outer ring to a position apart a specified distance in the longitudinal direction of the track groove. The contour shape of the outer diameter surface of the trunnion journal is formed in the contour shape of the moving route of an ellipse when the ellipse is offset by a specified distance in the minor axis direction thereof or in the contour shape of the moving route of the ellipse when the ellipse is rotated by a specified angle around the center thereof.

Inventors:
Nozaki, Takashi c/o NTN Corporation 1578 (Higashikaizuka Iwata-shi, Shizuoka 37, 43800, JP)
Sato, Yoji c/o NTN Corporation 1578 (Higashikaizuka Iwata-shi, Shizuoka 37, 43800, JP)
Application Number:
PCT/JP2004/014539
Publication Date:
May 12, 2005
Filing Date:
September 27, 2004
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku Osaka-shi, Osaka 03, 55000, JP)
Nozaki, Takashi c/o NTN Corporation 1578 (Higashikaizuka Iwata-shi, Shizuoka 37, 43800, JP)
Sato, Yoji c/o NTN Corporation 1578 (Higashikaizuka Iwata-shi, Shizuoka 37, 43800, JP)
International Classes:
F16D3/20; F16D3/205; (IPC1-7): F16D3/205
Foreign References:
JPS5354645A
JP2000320563A
JP2001234941A
JP2003097589A
JPS6455427A
Attorney, Agent or Firm:
Ehara, Syogo (Ehara Patent Office 15-26, Edobori 1-chome Nishi-k, Osaka-shi Osaka 02, 55000, JP)
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