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Light large-torque high-rigidity variable speed bicycle chain wheel assembly structure

A variable speed bicycle and sprocket assembly technology, which is applied to vehicle gearboxes, vehicle components, chain/belt transmissions, etc., can solve the problems of low rigidity of the teeth and large structural quality of the sprocket, and achieve lightweight and strong structure. Optimized effect

Inactive Publication Date: 2015-11-04
郑英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a sprocket assembly structure of light weight, large torque and high rigidity variable speed bicycle, under the premise of ensuring the structural strength, rigidity and transmission of large torque of the sprocket, the light weight of the structure can be realized; The existing variable-speed bicycle sprocket has a large structural mass and a technical problem that the rigidity of the teeth is small

Method used

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  • Light large-torque high-rigidity variable speed bicycle chain wheel assembly structure
  • Light large-torque high-rigidity variable speed bicycle chain wheel assembly structure
  • Light large-torque high-rigidity variable speed bicycle chain wheel assembly structure

Examples

Experimental program
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Effect test

Embodiment 2

[0031] Embodiment 2: The difference from Embodiment 1 is that the spline widening ring 22 is connected to the single-piece tooth 2 by riveting; the thickness t of the single-piece tooth 2 is 3mm, and the width of the spline widening ring 22 is h1 is 6 mm, and the thickness a of the spline widening ring 22 is 8 mm; the joints of the integral tower wheel 1 and the single-piece tooth 2 with the support tube 3 are fabricated connections;

[0032] The product manufactured through the implementation method of Example 2, the entire sprocket weighed 213g after assembly, and then tested for a long time, with a loading torque of 100N*m to 250N*m, multiple speed changes were rapid and smooth, and there was no abnormality in continuous operation of 20,000km; The sprocket produced in this embodiment can maintain a good level of structural strength, rigidity and large torque transmission, and its mass is about 160g smaller than the sprocket of the traditional structure.

Embodiment 3

[0033] Embodiment 3: The difference from Embodiment 1 is that the integral tower wheel 1 is welded to the single-piece tooth at the connecting convex tooth part; the thickness t of the single-piece tooth 2 is 2.5mm, and the width of the spline widening ring 22 h1 is 8 mm, and the thickness a of the spline widening ring 22 is 4 mm.

[0034] The product manufactured through the implementation method of Example 3, after the assembly of the entire sprocket, weighed 202g, and then tested for a long time, with a loading torque of 100N*m to 250N*m, multiple speed changes were rapid and smooth, and there was no abnormality in continuous operation of 20,000km; The sprocket produced in this embodiment can maintain a good level of structural strength, rigidity and large torque transmission, and its mass is about 170g smaller than the sprocket of the traditional structure.

Embodiment 4

[0035] Embodiment 4: The difference from Embodiment 2 is that the connection between the spline widening ring and the single tooth is welding, the thickness t of the single tooth 2 is 2.5mm, and the width h1 of the spline widening ring 22 is 10mm, and the thickness a of the spline widening ring 22 is 5mm.

[0036] For the product manufactured through the implementation of Example 4, the entire sprocket weighed 215g after assembly, and then tested for a long time, with a loading torque of 100N*m to 280N*m, multiple speed changes were rapid and smooth, and there was no abnormality in continuous operation of 20,000km; The sprocket produced in this embodiment can maintain a good level of structural strength, rigidity and large torque transmission, and its mass is about 160g smaller than the sprocket of the traditional structure.

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Abstract

The invention relates to the field of variable speed bicycles, in particular to a light large-torque high-rigidity variable speed bicycle chain wheel assembly structure. The light large-torque high-rigidity variable speed bicycle chain wheel assembly structure comprises an integral stepped pulley, a single-piece tooth and a supporting cylinder. The supporting cylinder is installed between the integral stepped pulley and the single-piece tooth. A plurality of different-radius layer teeth of the integral stepped pulley are integrally connected layer by layer to form a hollow tower model. The sides, close to the single-piece tooth, of the inner side layer teeth are provided with protruding teeth. Tooth holes corresponding to the protruding teeth are formed in the single-piece tooth. The protruding teeth are in interference connection with the tooth holes in the single-piece tooth. The inner diameter portion of the single-piece tooth and the inner diameter portion of the smallest layer tooth of the integral stepped pulley are provided with a single-piece tooth inner spline and a stepped pulley inner spline. The light large-torque high-rigidity variable speed bicycle chain wheel assembly structure can be light on the premise of ensuring the structural strength, rigidity and large transmission torque of a chain wheel.

Description

technical field [0001] The invention relates to the field of speed-changing bicycles, in particular to a light-weight, high-torque, high-rigidity speed-changing bicycle sprocket assembly structure. Background technique [0002] Lightweight and high strength are the eternal themes pursued by today's bicycles and even all means of transportation. At this stage, the bicycle frame mainly achieves weight reduction and strength improvement through the application of high-performance materials or structural optimization design. In terms of the application of high-performance materials, at present, the existing ordinary mountain bike frames and wheels are basically made of 6XXX series aluminum alloy profiles, and most high-performance mountain bikes are made of carbon fiber. Carbon fiber is light in weight and high in strength, but expensive; magnesium alloys have limited their development due to strength and corrosion protection; thus aluminum alloys have been more widely used. H...

Claims

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Application Information

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IPC IPC(8): B62M9/12
Inventor 郑英郑军薛慧
Owner 郑英
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