Title:
ROCKER ARM AND METHOD FOR MANUFACTURING THE SAME
Document Type and Number:
Japanese Patent JP3659961
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a rocker arm by performing cold forging of a stock formed of a metallic wire, and to enhance the performance of an engine with the rocker arm built therein.
SOLUTION: A second intermediate stock 34b having a pair of side wall parts 2a and a base part 39 to connect one end part to each other in the width direction of the side wall parts 2a respectively by performing cold forging on a stock obtained by cutting a metallic wire to the predetermined length. First and second connection parts are formed by blanking the base part 39 of the second intermediate stock 34b. When it is assumed that a roller 35 is disposed at the position corresponding to the position of arrangement of the roller in a rocker arm to be obtained on the inner side of the second intermediate stock 34b to be blanked, the roller 35 is not allowed to interfere with the base part 39.
Inventors:
Shoichi Abe
Kiyoshi Okubo
Yasushi Watanabe
Takanori Oshima
Kiyoshi Okubo
Yasushi Watanabe
Takanori Oshima
Application Number:
JP2003161583A
Publication Date:
June 15, 2005
Filing Date:
June 06, 2003
Export Citation:
Assignee:
Nippon Seiko Co., Ltd.
nsk Steering Systems Co., Ltd.
nsk Steering Systems Co., Ltd.
International Classes:
F01L1/18; B21J13/02; B21K1/20; (IPC1-7): B21K1/20; B21J13/02; F01L1/18
Domestic Patent References:
| JP1091931A | ||||
| JP2001047179A | ||||
| JP2003001362A | ||||
| JP2003001361A | ||||
| JP10328778A |
Attorney, Agent or Firm:
Takeo Koyama
Nakai Shun
Kinzo Koyama
Nakai Shun
Kinzo Koyama