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Method for carrying out a multiple gear-shifting in an electronically servo-assisted bicycle gearshift and related gearshift

A technology for assisting bicycles and transmissions. It is applied to bicycle gear transmission mechanisms, bicycle accessories, and vehicle gearboxes. It can solve problems such as tilting of the intermediate sprocket, mechanical damage to the transmission, and falls.

Active Publication Date: 2008-10-08
CAMPAGNOLO SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Both solutions have the disadvantage that the chain is aligned at a large angle with respect to the plane of the target sprocket and is inclined with respect to the intermediate sprocket
In this case, the chain may loose traction and / or get caught in the middle sprocket, which will cause the rider to possibly lose his / her balance and fall
and the transmission may be mechanically damaged

Method used

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  • Method for carrying out a multiple gear-shifting in an electronically servo-assisted bicycle gearshift and related gearshift
  • Method for carrying out a multiple gear-shifting in an electronically servo-assisted bicycle gearshift and related gearshift
  • Method for carrying out a multiple gear-shifting in an electronically servo-assisted bicycle gearshift and related gearshift

Examples

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Embodiment Construction

[0070] With reference to FIG. 1 , a bicycle 1 , in particular a racing car, comprises a frame 2 formed by known methods, defining a support structure 3 by means of tubular elements for the rear wheel 4 and a front fork 5 for the front wheel 6 . The handle 70 having a tubular structure is effectively connected with the front fork 5 .

[0071] The frame 2, in its lower part, supports the pedal crankshaft or pedal unit 7, for the conventional type, which according to the invention drives the rear wheel 4 via an electronic servo transmission, generally shown with the reference numeral 8.

[0072] The transmission 8 is composed of a rear group 9 and a front group 10 . The rear derailleur group 9 comprises a plurality of sprockets or sprockets 11 (typical number 9, 10, 11 or others) of different diameters coaxial with the rear wheel 4 (axis A). The front derailleur group 10 includes a plurality of sprockets or crowns or gears 12 (3 shown, it could be 2 or other numbers) of differen...

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Abstract

The present invention concerns a method for carrying out a multiple gear-shifting in an electronically servo-assisted bicycle gearshift, wherein a multiple gear-shifting request is divided into a plurality of single gear-shiftings between two adjacent toothed wheels. In such a way, the danger for the rider and the mechanical damage to the gearshift are reduced. The invention also concerns a program, an electronic circuit and a gearshift having means for actuating the method.

Description

technical field [0001] The present invention relates to a method for realizing multi-stage shifting in an electronic servo bicycle transmission, as well as a program, a circuit and a transmission with a device for realizing the method. Background technique [0002] A bicycle derailleur usually consists of a chain and a gear for transmitting motion from the pedal crankshaft to the bicycle drive wheel and a selector gear that changes the transmission ratio of the motion by meshing with the chain. [0003] More specifically, the rear derailleur group is usually together with the hub of the rear wheel of the bicycle and consists of at least two toothed wheels (also called sprockets), a guide unit for the chain (also called rear derailleur or single stage shifting), and a control mechanism that guides the axial movement of the chain in the derailleur group so that the chain engages with a predetermined sprocket in response to a manual command, usually via a lever attached to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62M9/12B62M25/08B62J99/00B62M9/122
CPCB62M25/08B62M9/122Y10T74/20438
Inventor 詹弗兰科·古代尔佐
Owner CAMPAGNOLO SRL