Rim for a bicycle spoked wheel and relative spoked wheel

A spoked wheel and bicycle technology, applied to spoked wheels, wheels, rims, etc., can solve the problem of increasing the length of the sub-spoke area

Pending Publication Date: 2008-03-05
CAMPAGNOLO SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The aforementioned daisy effect is more pronounced for spokes with spoke groups due to the concentration of spoke tension and the increased length of the sub-spoke regions

Method used

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  • Rim for a bicycle spoked wheel and relative spoked wheel
  • Rim for a bicycle spoked wheel and relative spoked wheel
  • Rim for a bicycle spoked wheel and relative spoked wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] Figure 1 shows a wheel 1 with a rim 2 according to a first embodiment of the invention.

[0062] The wheel 1 is a rear wheel with seven triplets each comprising three spokes 3 , 4 , 5 tensioned between the hub M1 and the seven spoke connection areas 6 of said rim 2 .

[0063] Two sides A, B are defined in said wheel 1 and the corresponding rim 2 , a first side on the side on which the sprocket support S is fixed to said hub M1 , and a second side on the opposite side.

[0064] Fourteen side spokes 3, 5 of each triplet extend tangentially from said hub M1 on the first side A, while seven central spokes 4 of each triplet extend from all spokes on said second side B The hub M1 extends radially. There are therefore twice as many spokes 3 , 5 (fourteen) on the first side A as there are spokes 4 on the second side B (seven).

[0065] Between adjacent spoke connection regions 6 , the rim 2 has seven sub-spoke regions 7 each having a central portion 8 and two side portions 9 ...

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PUM

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Abstract

A rim (2) for a bicycle spoked wheel (1) is disclosed, comprising spoke attachment areas (6) and infra-spoke areas (7), wherein the radial section of the rim in a central part (8) of the infra-spoke areas has a greater moment of inertia than the radial section of the rim in lateral parts (9) of the infra-spoke areas (7). It is thus possible to increase the stiffness of the rim (2) to counteract the daisy effect.

Description

technical field [0001] The present invention relates to a rim for a spoked bicycle wheel and a spoked bicycle wheel comprising such a rim. Background technique [0002] As is known, a spoked bicycle wheel is formed from a peripheral circumference or rim, a central hub and a plurality of spokes connecting said hub to a spoke attachment area of ​​said rim. [0003] The stiffness of the rim is particularly important for the so-called "daisy effect", which occurs when the spokes are pulled taut to form the wheel, where the spokes or groups of spokes are closely spaced, i.e. where the spokes join In the region, rim deformation occurs with a local reduction in diameter. In the parts where there are no spokes or groups of spokes, the so-called sub-spoke regions, such a reduction in diameter occurs rarely, or not at all, or even increases in diameter. The result is that the wheel can be seen to "expand" radially in said sub-spoke area. In such sub-spoke regions, the rim not held ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60B21/06
CPCB60B1/0215B60B21/062B60B21/04B60B21/064B60B1/003B60B21/025
Inventor 达维德·乌尔巴尼
Owner CAMPAGNOLO SRL
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