Bicycle Front Derailleur with Mounting Structure and Bicycle Frame with Front Derailleur Mounting Structure

Patent metadata

Field	Value
Publication number	US-2016167741-A1
Application number	US-201414566718-A
Country	US
Kind code	A1
Filing date	Dec 11, 2014
Priority date	Dec 11, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

A bicycle front derailleur includes a mounting member, a chain guide, and a linkage assembly that pivotally couples the mounting member to the chain guide. The mounting member is configured to be mounted to a first frame member of a bicycle frame. The first frame member is pivotally connected to a second frame member of the bicycle frame about a pivot axis. The mounting member includes an attachment portion through which a fixing bolt for fixing the mounting member to the first frame member passes and includes an abutment configured to restrict rotation of the mounting member around the fixing bolt. The attachment portion is located on a front side of the pivot axis when the mounting member is mounted to the first frame member. The bicycle frame includes a structure for engaging and supporting the mounting member.

First claim

1 . A bicycle front derailleur comprising:
a mounting member configured to be mounted to a first frame member of a bicycle frame, the first frame member being pivotally connected to a second frame member of the bicycle frame about a pivot axis; a chain guide; and a linkage assembly that pivotally couples the mounting member to the chain guide, wherein the mounting member includes an attachment portion through which a fixing bolt for fixing the mounting member to the first frame member passes and includes an abutment configured to restrict rotation of the mounting member around the fixing bolt by abutting the first frame member, the attachment portion is configured to be located on a front side of the pivot axis when the mounting member is mounted to the first frame member.

2 . The bicycle front derailleur according to claim 1 , wherein the abutment is integrally formed with the mounting member.

3 . The bicycle front derailleur according to claim 1 , wherein the first frame member is a chain stay of the bicycle frame, and the second frame member is a seat tube of the bicycle frame.

4 . The bicycle front derailleur according to claim 1 , wherein the attachment portion is an elongated opening extending in a longitudinal direction of the second frame member when the mounting member is mounted to the first frame member.

5 . The bicycle front derailleur according to claim 4 , wherein the abutment is one of a protrusion and an elongated recess, the first frame member includes the other of the protrusion and the elongated recess, the protrusion and the elongated recess are configured to engage with one another, and the elongated recess extends in a longitudinal direction of the second frame member when the mounting member is attached to the first frame member.

6 . The bicycle front derailleur according to claim 1 , wherein the abutment is configured to be located on a front side of the pivot axis when the mounting member is mounted to the first frame member.

7 . The bicycle front derailleur according to claim 1 , wherein the mounting member is configured to be mounted to a connecting portion of the first frame member.

8 . The bicycle front derailleur according to claim 1 , wherein the mounting member includes a reinforcement portion, which is located on a rear side of the attachment portion.

9 . The bicycle front derailleur according to claim 8 , wherein the reinforcement portion is formed without any portion that allows a fixing bolt passing through to fix the mounting member to the first frame member.

10 . The bicycle front derailleur according to claim 1 , wherein the attachment portion extends below the chain guide.

11 . A bicycle front derailleur comprising:
a mounting member configured to be mounted to a first frame member of a bicycle frame, wherein the first frame member is pivotally connected to a second frame member of the bicycle frame about a pivot axis, and the second frame member includes a bottom bracket hanger to which a bottom bracket is attached; a chain guide; a linkage assembly that pivotally couples the mounting member to the chain guide, wherein the mounting member includes a first attachment portion through which a first fixing bolt for fixing the mounting member to the first frame member passes and includes a second attachment portion through which a second fixing bolt for fixing the mounting member to the first frame member passes, and the first and second fixing bolts are configured to be located on a front side of the pivot axis, when the mounting member is mounted to the first frame member.

12 . A bicycle frame comprising:
a first frame member and a second frame member configured to be pivotally connected to the first frame member about a pivot axis, wherein the first frame member includes a threaded hole through which a fixing bolt for fixing a mounting member of a bicycle front derailleur to the first frame member passes and includes an abutting portion configured to restrict rotation of the mounting member around the fixing bolt by abutting the mounting member of the bicycle front derailleur, and the threaded hole is located on a front side of the pivot axis.

13 . The bicycle frame according to claim 12 , wherein the first frame member is a chain stay of the bicycle frame, and the second frame member is a seat tube of the bicycle frame.

14 . A bicycle frame comprising:
a second frame member and a first frame member configured to be pivotally connected to the second frame member about a pivot axis, wherein the second frame member includes a bottom bracket hanger to which a bottom bracket is attached, wherein the first frame member includes a first threaded hole through which a first fixing bolt for fixing a mounting member of a bicycle front derailleur to the first frame member passes and includes second threaded hole through which a second fixing bolt for fixing a the mounting member of the bicycle front derailleur to the first frame member passes, and the first and second threaded holes are located on a front side of the pivot axis.

15 . The bicycle frame according to claim 14 , wherein the first frame member is a chain stay of the bicycle frame, and the second frame member is a seat tube of the bicycle frame.

Assignees

• Shimano Kk

Inventors

• Emura Atsuhiro
• Inoue Kenkichi

Classifications

• B62K25/30

  pivoted on pedal crank shelf (B62K25/32 takes precedence) · CPC title

• B62K3/02

  Frames (tandem frames B62K3/14) · CPC title

• B62J1/08

  Frames for saddles; Connections between saddle frames and seat pillars; Seat pillars (attaching seat pillars to cycle frames B62K19/36) · CPC title

• B62M9/136

  Chain guides; Mounting thereof · CPC title

• B62K19/30

  Frame parts shaped to receive other cycle parts or accessories (axle suspensions B62K25/00) · CPC title