Automatic bicycle speed variator

An automatic transmission and bicycle technology, which is applied to bicycle gear shifting mechanisms, bicycle accessories, vehicle gearboxes, etc., can solve the problems of large axial transmission resistance, difficult shifting control, and inflexible shifting control, and achieve flexible shifting and shifting control. easy effect

Inactive Publication Date: 2006-10-18
程辉
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The variable speed control is realized by changing the three speed gears of the cross wheel in the axial direction through a series of axial transmission devices. The axial transmission resistance is relatively large, which makes the variable speed control inflexible;
[0005] 2. The speed change device has a planetary gear train, and the speed change is realized by changing the input position. In the low, medium and high speed gears, the gear cross wheel is the driving element of the transmission, and the gear cross wheel and the transmission elemen

Method used

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  • Automatic bicycle speed variator
  • Automatic bicycle speed variator

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Embodiment Construction

[0024] Figure 1 to Figure 10 Among them, the bicycle automatic transmission has an axle 1 for being installed on the rear axle of the bicycle, an automatic transmission is sleeved on the axle, the automatic transmission has a hub shell 2, and a power input sprocket 3 is arranged on the axle at the outer end of the hub shell. The body is the variable speed output hub, and the axle in the hub shell has a speed change device and a speed change control device. The speed change device has three planetary gear trains 4, 5, 4, 5, 6. The ring gears, planetary gears and sun gears of the three planetary gear trains have the same modulus respectively. The sun gears of the three planetary gear trains are installed on the axle respectively. The planetary carrier 7 of the first planetary gear train is the second planetary gear The planetary carrier of the system, the ring gear 8 of the second-stage planetary gear train is the planet carrier of the third-stage planetary gear train, and the ...

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Abstract

The automatic bicycle speed variator mounted on the shaft has power input chain wheel, speed varying output hub, speed variator and speed variation controller inside the hub casing. The speed variator includes three planetary gear trains with separated speed varying ratchet wheel and three ratchets separately fitting these three ratchet wheels inside the hub casing. The speed variation controller includes one second and one third centrifugal block balancing discs with hinged centrifugal block each, and the each of the centrifugal blocks has axial ratchet shifting rod connected to the ratchet. In the automatic bicycle speed variator, the ratchets and the ratchet wheels for the medium speed and high speed are controlled with the centrifugal blocks of different masses, so that the present invention has flexible speed variation and easy speed variation control.

Description

technical field [0001] The invention relates to a solid-shaft automatic transmission for bicycles, in particular to a speed change device and a speed-change control device for the solid shaft automatic transmission for bicycles. Background technique [0002] In the prior art, Chinese patent ZL 2004 2 0070090.3 discloses a solid-shaft automatic transmission for bicycles. The casing has a power input sprocket on the axle at one end of the casing, and a transmission output hub at the other end of the casing. There is a transmission device and a transmission control device inside the casing. The transmission device is a set of planetary gears coaxial with the axle. There is a ratchet pawl transmission device between the planetary gear system and the hub, and there are three speed gears of low, medium and high between the planetary gear system and the power input sprocket due to the different input parts to the planetary gear system; the speed change control device There is a ce...

Claims

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Application Information

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IPC IPC(8): B62M11/18B62M25/02
Inventor 程辉
Owner 程辉
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