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Title:
COMPRESSOR FOR REFRIGERATION, AND MANUFACTURING METHOD OF CONNECTING ROD THEREOF
Document Type and Number:
Japanese Patent JP2003120534
Kind Code:
A
Abstract:

To improve the wear resistance of a surface of a connecting rod, to prevent any fatigue fracture caused by cracks in a welded part between members, and also to improve the reliability of a compressor for refrigeration.

In the compressor for refrigeration which converts the rotational motion of a motor unit 2 into the reciprocating straight motion and transmits it to a piston 8 by using the connecting rod 9 which integrally joins a rod member 11 to a spherical member 10 fitted to a spherical support part 8a of the piston 8 in an oscillating manner and a ring member 12 with a crankshaft 6 rotatably fitted thereto by spot welding, the spherical member 10, the rod member 11 and the ring member 12 are formed of low carbon mild steel containing 0.15% or less carbon, and a surface hardened layer 15 by nitriding is formed on the connecting rod 9.


Inventors:
ABE NOBUO
KONNO HAJIME
Application Number:
JP2001309356A
Publication Date:
April 23, 2003
Filing Date:
October 05, 2001
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
F04B39/00; C21D9/00; F04B35/04; F16C7/02; (IPC1-7): F04B39/00; C21D9/00; F16C7/02
Attorney, Agent or Firm:
Katsuo Ogawa (2 outside)