HEAT TREATMENT METHOD, OUTSIDE JOINT MEMBER, AND TRIPOD-TYPE CONSTANT VELOCITY UNIVERSAL JOINT

WIPO Patent Application WO/2012/172940

A1

Provided is a heat treatment method by which it is possible to form an outside connecting member of a tripod-type constant velocity universal joint having an excellent strength by continuous high-frequency hardening without forming a hardened layer at the large-inner-diameter section. Also provided are an outside connecting member and a tripod-type constant velocity universal joint formed using the heat treatment method of such description. A heat treatment device performs continuous hardening, in which a high-frequency induction heating coil (56) is moved axially with respect to the outside joint member (31). The outside joint member (31) has track grooves (36), comprising roller guide surfaces (37, 37) which face each other in the circumferential direction and a large-diameter section (43) provided between the roller guide surfaces, formed in three locations of the inner circumference. In the continuous hardening, a hardened layer (S) is formed on the roller guide surfaces (37, 37) of the outside joint member (31). The heat treatment device is provided with a large-inner-diameter-section cooling means (M1) for discharging water onto the large-diameter section (43) and suppressing the temperature increase of the large-diameter section (43).

JPH05296254	BALL JOINT MECHANISM
JP2009270058	GREASE COMPOSITION FOR CONSTANT-VELOCITY JOINT AND CONSTANT-VELOCITY JOINT

SUZUKI SHINTARO (JP)
SHIMASAWA TAKESHI (JP)

PCT/JP2012/063176

December 20, 2012

May 23, 2012

Click for automatic bibliography generation  

NTN TOYO BEARING CO LTD (JP)
SUZUKI SHINTARO (JP)
SHIMASAWA TAKESHI (JP)

F16D3/20; C21D1/10; C21D9/40; F16D3/205

JPS58213828A	1983-12-12
JP2002080914A	2002-03-22
JPS59129866U	1984-08-31

SHIROMURA Kunihiko et al. (JP)
Kunihiko Shiromura (JP)

View/Download PDF      PDF Help

Previous Patent: ELECTRONIC COMPONENT AND METHOD FOR MANUFACTURING SAME

Next Patent: COMPRESSOR