Stepless automatic speed change device for bicycle

An automatic transmission device, bicycle technology, applied to vehicle gearboxes, wheel transmissions, vehicle components, etc., can solve problems such as inconvenient operation and inability to achieve automatic shifting

Active Publication Date: 2019-04-30
张占庚 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the EXTROID CVT in the prior art wants to change the rotors to adjust the speed ratio, the two rotors are rotated manually, and the effect of automatic conversion cannot be achieved, which is inconvenient in operation, so it still needs to be improved

Method used

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  • Stepless automatic speed change device for bicycle
  • Stepless automatic speed change device for bicycle
  • Stepless automatic speed change device for bicycle

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Embodiment Construction

[0034] In the following, the technical means adopted by the present invention to achieve the intended purpose of the invention will be further described in conjunction with the accompanying drawings and preferred embodiments of the present invention.

[0035] see figure 1 and image 3 As shown, the bicycle stepless automatic transmission of the present invention includes a housing 10, a central shaft 20, a power input disc 31, a power output disc 32, two rotors 41, two transmission discs 42, a centrifugal assembly 50, a The elastic element 60 , an input toothed plate 71 , a hub 72 and a reverse assembly 80 .

[0036] The aforementioned casing 10 is rectangular in this embodiment, but its shape is not limited thereto; the casing 10 is a fixed component relative to the whole bicycle and does not rotate with other components.

[0037] The aforementioned central shaft 20 runs through the housing 10, and the central shaft 20 is the axle of the rear wheel of the bicycle. Therefore...

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PUM

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Abstract

The invention discloses a stepless automatic speed change device for a bicycle. The device comprises a shell, a central shaft, a power input disc, a power output disc, two rotors, two transmission discs, a centrifugal assembly, an elastic element and a reversing assembly; and the centrifugal assembly is connected with and drives the two rotors. When the rotating speed of bicycle wheels is higher,the rotating speed of the centrifugal assembly is higher, and the centrifugal assembly can automatically rotate the two rotors under the action of centrifugal force to gradually reduce the reduction ratio of the power input disc and the power output disc; when the rotating speed of the wheels is reduced, the elastic element can push the centrifugal assembly to reversely rotate the two rotors, so that the reduction ratio of the power input disc and the power output disc is increased. Rotation of the rotors is automatically controlled through centrifugal force generated during rotation of the wheels, and then the reduction ratio is automatically adjusted, so that the purpose of automatic stepless speed change is achieved.

Description

technical field [0001] The invention relates to a speed change device of a bicycle, especially an automatic stepless speed change device using EXTROID CVT. Background technique [0002] EXTROID CVT (EXTROID CVT) is a stepless speed change device commonly used in vehicles such as automobiles or bicycles. It includes a power input disc, a power output disc, two rotors and two transmission discs; the power input disc and the power output disc are connected to each other The power input disc and the power output disc are arranged at intervals and coaxially, and a conical portion protrudes toward each other. The two rotors are located between the power input disc and the power output disc. The opposite sides of the transmission disc are respectively attached to the conical surfaces of the power input disc and the power output disc, so that when the power input disc rotates, the power input disc drives the transmission disc to rotate, and the transmission disc drives the power out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M11/14
CPCB62M11/14
Inventor 张占庚
Owner 张占庚
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