Direct-assembling type hollow crank assembly of bicycle and processing method of hollow crank

A direct-mounted, bicycle-based technology, applied in the crank structure, vehicle parts, transportation and packaging, etc., can solve the problems of complex and difficult processing, decreased crankset efficiency, and low degree of freedom, so as to avoid cumbersome disassembly and assembly and reduce weight , the effect of reducing the difficulty of manufacturing

Inactive Publication Date: 2016-12-07
雷明久
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing bicycle cranks tend to cause lateral deformation of the chainring when pedaling, resulting in a decrease in efficiency, and because the existing cranks are mostly solid workpieces, resulting in a large weight, and the prior art mostly focuses on reducing the weight of the crank Extrusion molding, separate welding, buried pipe casting, light alloy casting, and emptying after buried sand casting are adopted, but there are problems such as high cost, low degree of freedom, low strength, complex processing, and low yield.

Method used

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  • Direct-assembling type hollow crank assembly of bicycle and processing method of hollow crank
  • Direct-assembling type hollow crank assembly of bicycle and processing method of hollow crank
  • Direct-assembling type hollow crank assembly of bicycle and processing method of hollow crank

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Embodiment Construction

[0032] Such as figure 1 As shown, the present invention provides a direct-mounted hollow crank assembly for bicycles, comprising a right crank device 1, a left crank device 2 and a central axis shaft rod 3, the right crank device 1 includes a right crank 11 with a hollow structure, and the left crank device 2 includes a left crank 21 with a hollow structure, and the central axis rod 3 is arranged between the right crank 11 and the left crank 21. Such as image 3 and Figure 8 As shown, the right crank 11 includes a right crank rod 81 and a right crank head 82, and the right crank head 82 is located at the end of the right crank rod 81, and the left crank 21 includes a left crank rod 91 and a left crank head 92, and the left crank head 92 is located at the end of the right crank rod 81. The end of the left crank rod 91, the inside of the right crank rod 81 and the left crank rod 91 are all provided with the hollow structure, and the cavity extends from one end of the right cr...

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Abstract

The invention relates to a bicycle direct-mounted hollow crank assembly and a processing method for the hollow crank, comprising a right crank device, a left crank device and a central axis shaft rod, the crank assembly can reduce the weight of the bicycle crank and ensure higher strength , to avoid the traditional bicycle crank cumbersome disassembly and low rigidity problems, and the processing difficulty of the right crank and left crank is greatly reduced, so that the yield has been greatly improved and the cost has been reduced.

Description

technical field [0001] The invention relates to the technical field of bicycle accessories, in particular to a bicycle direct-mounted hollow crank assembly and a processing method for the hollow crank. Background technique [0002] Existing bicycle cranks tend to cause lateral deformation of the chainring when pedaling, resulting in a decrease in efficiency, and because the existing cranks are mostly solid workpieces, resulting in a large weight, and the prior art mostly focuses on reducing the weight of the crank Extrusion molding, separate welding, buried pipe fitting casting, light alloy casting, and emptying after buried sand casting are used, but there are problems such as high cost, low degree of freedom, low strength, complicated and difficult processing, and low yield. Contents of the invention [0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a direct-mounted hollow crank assembly for bicycles with light weigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M3/00B23P15/00
CPCB62M3/00B23P15/00
Inventor 雷明久余其越郑博仁
Owner 雷明久
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