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Rim for a bicycle wheel made from composite material with a wear indicator and wheel comprising such a rim

A technology of wear indicators and composite materials, which is applied to wheels, bicycles, and two-wheeled bicycles made of non-metallic materials, and can solve problems such as weakened rims and unsatisfactory rim wear

Active Publication Date: 2008-12-03
CAMPAGNOLO SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the case of rims made of composite materials, typically structural fibers with a polymeric shear, so machining unacceptably weakens the rim
[0006] The problem of checking the wear of rims made of composite materials is completely unsatisfactory

Method used

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  • Rim for a bicycle wheel made from composite material with a wear indicator and wheel comprising such a rim
  • Rim for a bicycle wheel made from composite material with a wear indicator and wheel comprising such a rim
  • Rim for a bicycle wheel made from composite material with a wear indicator and wheel comprising such a rim

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Experimental program
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Embodiment Construction

[0045] specific reference Figures 1 to 4 According to the invention, the rim 1 made of composite material comprises two lateral sides 5 connected by an upper bridge 10 and a lower bridge 15 so as to form a tubular support structure.

[0046] Each side 5 comprises a brake raceway 20 , which refers to the area where the brake pads of the bicycle on which the wheel comprising the rim 1 is mounted can act during braking. The rim 1 is of the so-called high profile type, ie has a pronounced extension in radial direction. The brake race 20 has a greater width than is used to accommodate the brake pads to allow for an acceptable range of positions. Typically, it can be considered that the brake race is the radially outermost part of the side 5 equal to a height H of about 10-12 mm, but of course different dimensions are possible. In order to counteract the action of the brake pads on the brake track 20 , the side surface 5 has a greater thickness at this raceway 20 than in other re...

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Abstract

This rim (1) for a bicycle wheel (60) made from composite material comprises two opposite sides (5) on which two respective braking races (20) are formed that are subject to wear as a consequence of braking, and is characterised in that it comprises at at least one of said braking races (20), at least one first outer layer (25), and a wear indicator (40), suitable for indicating when a predetermined level of wear has been reached by the rim (1) at the braking races (20), arranged in the rim (1) in an inner position with respect to the first layer (25). In this way, the wear indicator (40) does not in the slightest blemish the outer surface of the rim (1) and therefore its mechanical strength.

Description

technical field [0001] The present invention relates to a rim for a bicycle wheel made of composite material and a bicycle wheel comprising such a rim. Background technique [0002] Rims for bicycle wheels typically have a structure that extends between two opposing sides connected by one or more bridges to form a U-shape, an inverted A-shape, or a more complex shape with a number of cavities called cavities. section. In wheels with pad brakes, brake races are formed on the sides of the rim onto which brake pads are pressed to brake the bicycle. [0003] In-depth research on the lightness of bicycle wheels has resulted in rims being manufactured with an always low thickness; at the limit, at the rim, there is a support structure that is only slightly larger than sufficient to withstand the loads it is subjected to. Because of this, the wear of the rim due to the wear of the brake pads must be carefully observed; indeed, excessive wear of the rim at the brake raceway can ca...

Claims

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Application Information

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IPC IPC(8): B60B5/02B60B19/00
CPCB60Y2200/13B60B21/04B60B25/00B60B5/02B60B21/062B60B21/025
Inventor 朱塞佩·达尔普拉
Owner CAMPAGNOLO SRL
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