Title:
チェーン用油溜まり盲溝付ブシュの製造方法
Document Type and Number:
Japanese Patent JP3982706
Kind Code:
B2
Abstract:
A cylindrical bearing member, which can hold lubricating oil in blind grooves as oil reservoirs for a long period of time to exhibit a lubricating function sufficiently, the blind grooves being efficiently mass-produced on the inside of the cylindrical member at low cost. The cylindrical bearing member has an inner circumferential surface having a plurality of blind grooves and is formed as a hollow open-ended cylindrical member with a bottom from a circular column-shaped crude material or blank. The blank includes a tapered inner circumferential surface at its open end. A groove forming die pin including groove forming protrusions is pushed from the open end towards the bottom to obtain a cylindrical member in which a plurality of grooves are formed on the inner surface. The grooving die pin is removed, then the tapered inner circumferential surface of the cylindrical member 107 is returned and straightened to a cylindrical shape to close the grooves at the open end of the member, and then the bottom is removed from the cylindrical member.
Inventors:
Hirofumi Miki
Application Number:
JP2004167634A
Publication Date:
September 26, 2007
Filing Date:
June 04, 2004
Export Citation:
Assignee:
Tsubakimoto Chain Co., Ltd.
International Classes:
F16C33/14; A61C13/28; F16G13/02; B21C1/26; B21D31/04; B21D53/00; B21J5/10; B21J5/12; B21K1/08; B21K21/12; B23P13/02; F16C33/10; F16G13/06; F16H57/04
Domestic Patent References:
| JP7217646A | ||||
| JP7004435A | ||||
| JP59185539A | ||||
| JP2002346690A | ||||
| JP2004322169A |
Attorney, Agent or Firm:
Takashi Tsuno
Masayuki Miyake
Atsuo Kawai
Masayuki Miyake
Atsuo Kawai