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Crank web assembly of bicycle

A bicycle crank arm and bicycle technology, which is applied to crank structures, vehicle components, dovetail connections, etc., can solve problems such as bending, damage to the bicycle crank arm, and increasing the clearance between the bicycle crank arm and the pedal shaft.

Inactive Publication Date: 2004-08-11
SHIMANO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the play inherent in the threads, the structural arrangement of such conventional stiffeners increases play in the coupling of the bicycle crank arm to the pedal shaft.
This play at the junction of the crank arm and the pedal often causes damage to the bicycle crank arm, such as bending and cracking, when external forces are applied to the crank arm through the pedal

Method used

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  • Crank web assembly of bicycle
  • Crank web assembly of bicycle
  • Crank web assembly of bicycle

Examples

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Embodiment Construction

[0028] Selected embodiments of the present invention will now be described with reference to the accompanying drawings. Those of ordinary skill in the art to which the present invention belongs should clearly understand by reading the present disclosure that the following descriptions of the embodiments of the present invention are only for illustration, rather than for the present invention defined by the appended claims and their equivalents Make restrictions.

[0029] See first figure 1 , the bicycle 10 shown is equipped with a bicycle crankset 12 according to one embodiment of the present invention. Bicycle 10 basically has a frame 13 to which crankset 12 is coupled in a conventional manner. Except for selected portions of the crankset 12 as described below, the bicycle 10 is otherwise conventional. Accordingly, bicycle 10 and its various components will not be discussed or illustrated in detail herein, other than those pertaining to the present invention. In other wor...

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PUM

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Abstract

A bicycle crank arm assembly is provided with a bicycle crank arm (14) with a first end configured to be coupled to an axle (16c) of a bottom bracket (16) and a second end with a pedal attachment bore (40) for receiving a bicycle pedal shaft. A tubular member (44) is press fitted into the bore of the bicycle crank arm (14). The tubular member (44) has an external circumferential surface with serrations that surface is non-releasably press fitted into the pedal attachment bore (40) of the bicycle crank arm (14), and an internally threaded surface adapted to be coupled to the bicycle pedal shaft. The crank arm (14) preferably has a counterbore at one axial end of the pedal attachment bore (40) with a washer (46) disposed therein such that the washer (46) partially overlaps the tubular member (44).

Description

technical field [0001] The present invention generally relates to a bicycle crank arm assembly. More particularly, the present invention relates to a bicycle crank arm assembly having a bicycle crank arm and a pedal attachment hole having a reinforcement member. Background technique [0002] Cycling is becoming an increasingly popular form of recreation as well as a mode of transportation. Moreover, cycling has become a very popular competitive sport among both amateurs and professionals. Whether the bicycle is used for recreation, transportation or competition, the bicycle industry is constantly improving the various components of the bicycle as well as the frame of the bicycle. One such component that has undergone extensive redesign is the bicycle crank arm. [0003] In recent years, some cyclists have become particularly fond of very strenuous riding in the mountains. When riding in the mountains, various components can often be damaged. One particular component tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M3/00
CPCB62M3/00B62M3/003F16B2200/30Y10T74/2164Y10T403/46
Inventor 山中正广
Owner SHIMANO INC
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