Title:
SLIDING-TYPE CONSTANT VELOCITY UNIVERSAL JOINT
Document Type and Number:
WIPO Patent Application WO/2007/034776
Kind Code:
A1
Abstract:
To provide a lightweight and compact DOJ-type constant velocity universal joint enabling
the maximum operating angle of 30° or larger by properly setting the contact
angle, contact rate, and cage offset amount of balls on ball grooves. The constant
velocity universal joint comprises an outer ring (12) in which six linear ball
grooves (12b) are axially formed in a cylindrical inner peripheral surface (12a);
an inner ring (13) in which six linear ball grooves (13b) are axially formed in
a spherical outer peripheral surface (13a) and a connection hole for connecting
a shaft is formed at its center part; the torque transmission balls (14) disposed
in ball tracks formed by the pair of ball grooves (12b) of the outer ring (12) and
the ball grooves (13b) of the inner ring (13); and a cage (15) having pockets (15c)
for storing the torque transmission balls (14), a convex outer peripheral surface
(15a) guided in contact with the inner peripheral surface (12a) of the outer ring
(12), and a concave inner peripheral surface (15b) guided in contact with the
outer peripheral surface (13a) of the inner ring (13) and having a spherical center
(Oco) on the outer peripheral surface (15a) and a spherical center (Oci) on the
inner peripheral surface (15b) offset opposite to each other in the axial direction
relative to the center (O) of the joint. The constant velocity universal joint
is characterized in that the ratio of a ball diameter to an outer ring diameter
is 0.21 - 0.25, the ratio of a ball pitch circle diameter to an outer ring outer diameter
is 0.64 - 0.68, the contact angle of the ball grooves is 30 - 35°, the contact
rate of the ball grooves is 1.02 - 1.08, and the ratio of a cage offset amount to the
ball pitch circle diameter is 0.07 to 0.09.
Inventors:
KOBAYASHI MASAZUMI (JP)
YAMAZAKI KISAO (JP)
YAMAZAKI KISAO (JP)
Application Number:
PCT/JP2006/318501
Publication Date:
March 29, 2007
Filing Date:
September 19, 2006
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
KOBAYASHI MASAZUMI (JP)
YAMAZAKI KISAO (JP)
KOBAYASHI MASAZUMI (JP)
YAMAZAKI KISAO (JP)
International Classes:
F16D3/227; F16D3/2245
Foreign References:
JP2001097063A | 2001-04-10 | |||
JP2005226778A | 2005-08-25 | |||
JP2002310180A | 2002-10-23 | |||
JP2005083408A | 2005-03-31 | |||
JPS6157233U | 1986-04-17 | |||
JPH03105725U | 1991-11-01 | |||
JPH04116018U | 1992-10-15 | |||
JPH1073129A | 1998-03-17 |
Other References:
See also references of EP 1927775A4
Attorney, Agent or Firm:
EHARA, Syogo et al. (15-26, Edobori 1-chome,, Nishi-ku, Osaka-sh, Osaka 02, JP)
Download PDF: