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Patent Searching and Data


Title:
FIXED-TYPE CONSTANT-VELOCITY UNIVERSAL JOINT
Document Type and Number:
WIPO Patent Application WO/2018/123394
Kind Code:
A1
Abstract:
Provided is a fixed-type constant-velocity universal joint 1 comprising: an outer joint member 2 in which a plurality of track grooves 7 extending in the longitudinal direction are formed in a spherical inner peripheral surface 6, and which has an opening side and an inward side spaced apart in the axial direction; an inner joint member 3 in which a plurality of track grooves 9 extending in the longitudinal direction are formed in a spherical outer peripheral surface 8 so as to be opposed to the track grooves 7 of the outer joint member 2; a torque transmission ball 4 which is incorporated between each pair of the opposing track grooves 7, 9; and a retainer 5 which retains the torque transmission balls 4, and is guided by the spherical inner peripheral surface 6 of the outer joint member 2 and the spherical outer peripheral surface 8 of the inner joint member 3. The outer joint member 2 and the inner joint member 3 have four pairs of track grooves 7, 9, respectively. The track grooves 7, 9 are composed of regular angular range track groove portions 7f, 9f in which orbital center lines Xf, Yf are arranged on planes A1, A1', A2, A2' centered on the axis N-N of the joint, high angular range track groove portions 7h, 9h in which orbital center lines Xh, Yh are arranged on planes B1, B1', B2, B2' parallel to planes PT1, PT2 including the axis N-N of the joint, and transition track groove portions 7t, 9t that smoothly connect the track groove portions 7f, 7h, 9f, 9h.

Inventors:
FUNAHASHI MASASHI (JP)
Application Number:
JP2017/042521
Publication Date:
July 05, 2018
Filing Date:
November 28, 2017
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16D3/2245
Foreign References:
JP2007503556A2007-02-22
JP2014074434A2014-04-24
JPH08210374A1996-08-20
JP2007270997A2007-10-18
JP2013015214A2013-01-24
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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