Chain connecting pin

• US 8,905,880 B2
• Filed: 08/06/2012
• Issued: 12/09/2014
• Est. Priority Date: 08/06/2012
• Status: Expired due to Fees

• Current Assignee: Shimano Inc
• Original Assignee: Shimano Inc
• Inventors: Inoue, Kenkichi, Fukumori, Tsuyoshi, Oishi, Toshinari
• Primary Examiner(s): Dondero, William E
• Assistant Examiner(s): Reese, Robert T
• Application Number:
  US13/567,789
• Publication Number:
  US 20140038759A1
• Time in Patent Office: 855 Days
• Field of Search: 474/234, 411/2, 411/4, 59/1, 59/7
• US Class Current: 474/234
• CPC Class Codes: B21L 9/065 Assembling or disassembling
• CPC Class Codes: B62M 9/00 Transmissions characterised by use of an endless chain, belt, or the like cycle chain guards B62J13/00
• CPC Class Codes: F16G 13/06 with links connected by parallel driving-pins with or without rollers so called open links if the parallel coupling pins have only a joining function - so called closed links - F16G13/02

Abstract

A chain connecting pin basically includes a pin body, a connecting portion and an inserting portion. The pin body has a first axial end face and a second axial end face, the second axial end face having a recessed surface with respect to an outermost edge of the second axial end face. The connecting portion is attached to the recessed surface of the second axial end face of the pin body. The inserting portion is attached to the connecting portion.

Claims

1. A chain connecting pin comprising:

a pin body having

a center cylindrical part having an outer diameter,

a first axial end face and a second axial end face, the second axial end face having a recessed surface with respect to an outermost edge of the second axial end face,

a first flange disposed adjacent the first axial end face, and

a second flange disposed adjacent the second axial end face;

a connecting portion attached to the recessed surface of the second axial end face of the pin body; and

an inserting portion attached to the connecting portion and haying a maximum outer width, the outer diameter of the center cylindrical part being greater than the maximum outer width of the inserting portion.

2. The chain connecting pin according to claim 1, wherein

the connecting portion is attached to the recessed surface of the second axial end face by a frangible connection.

3. The chain connecting pin according to claim 1, wherein

the pin body, the connecting portion and the inserting portion are formed integrally with one another.

4. The chain connecting pin according to claim 1, wherein

the recessed surface includes a tapering part that tapers closer toward the first axial end face as the tapering part extends in a direction from the outermost edge of the second axial end face toward a center axis of the pin body.

5. The chain connecting pin according to claim 1, wherein

the connecting portion is frustoconically shaped, and has a large diameter end attached to the inserting portion and a small diameter end attached to the recessed surface of the pin body.

6. The chain connecting pin according to claim 1, wherein

the connecting portion has a reduced diameter relative to the pin body and the inserting portion.

7. The chain connecting pin according to claim 1, wherein

the connecting portion has an axial length that is equal to or less than one millimeter.

8. The chain connecting pin according to claim 1, wherein

the second flange includes a partial spherical surface that extends in a radially outward direction from the outermost edge of the second axial end face.

9. The chain connecting pin according to claim 1, wherein

the inserting portion includes a narrowing tip part that narrows as the narrowing tip part extends in a direction away from the connecting portion toward a center axis of the pin body.

10. The chain connecting pin according to claim 9, wherein

the inserting portion further includes a cylindrical part extending axially between the connecting portion and the narrowing tip part.

11. The chain connecting pin according to claim 1, wherein

the first axial end face of the pin body includes a recess.

12. The chain connecting pin according to claim 11, wherein

the recess of the first axial end face of the pin body is conically shaped.