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Single rope stepless speed regulating bicycle

A stepless speed regulation, bicycle technology, applied in the direction of vehicle components, vehicle gearboxes, chain/belt transmissions, etc., can solve the problems of small transmission ratio adjustment range, small maximum transmission, loss, etc., and reach the transmission ratio adjustment range Large, self-adaptive pedaling stroke, labor-saving effect of starting and running

Inactive Publication Date: 2017-12-15
沈嘉诚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But no matter what kind of transmission device, it requires the rider to step on the left and right cranks to complete a circular motion to achieve power transmission. However, the structure of human leg muscles and bones determines that it is a lever force (the most effective work is bouncing) , when the cyclist pedals the left and right cranks to complete the circular motion, there will be energy loss. This loss is due to the fact that the strength of the cyclist's legs is mainly forward and downward, and the most comfortable motion track is a slightly forward curved arc. line, but the pedals acted by this force need to complete the rotation movement. As a result, when the crank moves to the upper and lower areas, it will encounter a position called "dead point of work". As long as the pedal is at the "dead point of work In the vicinity of ", part of the cyclist's foot power will inevitably be lost, and only 64% of the overall power consumption of the cyclist is transmitted to the sprocket of the bicycle
In addition: the friction of the chain itself and the friction with the large and small sprockets, pinching and contamination of clothes, frequent maintenance and refueling, short service life, and safety and reliability during riding all have certain defects
[0003] The most common transmission system of bicycles is a stepped speed regulating mechanism composed of multiple large and small sprocket assemblies and shifters at the front and rear. Adjustment; when riding uphill, its maximum transmission ratio is small, which cannot play a good role in saving labor; when riding on flat ground, its minimum transmission ratio is small, which seriously limits the maximum riding speed of the bicycle

Method used

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  • Single rope stepless speed regulating bicycle
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  • Single rope stepless speed regulating bicycle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a single-rope stepless speed regulation bicycle includes a vehicle frame 1 and a rear wheel 2, and the single-rope stepless speed regulation bicycle also includes two rocker pedals 3, a drive rope 4 and A certain pulley 5; one end of the rocker pedal 3 is hinged to the vehicle frame 1, and a pedal is arranged on the other end;

[0030] Such as figure 2 As shown, the center of the rear wheel 2 is provided with a driven drum 21 and a connecting shaft 22; the left end of the connecting shaft 22 is equipped with a left driving hub 23, and the right end is equipped with a right driving hub 24; the two ends of the driven drum 21 ratchets are arranged on the top, the left end surface of the left driving hub 23 is provided with ratchets, and the left end surface of the right driving hub 24 is provided with ratchets; the fixed pulley 5 is horizontally arranged in front of the rear wheel 2 , and installed on the vehicle frame 1; one end of the drivi...

Embodiment 2

[0035] It can be seen from the relevant knowledge of physics that the rocker pedal 3 forms a lever structure with its hinge point as the fulcrum, one of which is provided by the human foot, and the other force acts on the rocker pedal. 3 provided by the drive rope on;

[0036] The power applied by people's feet on the rocker arm pedal bar 3 can be roughly considered as constant, and the force arm can be roughly considered as constant with respect to the moment arm of the hinge point of the rocker arm pedal bar 3; Think that the moment that people's feet exert on the rocker pedal bar 3 is constant;

[0037] According to the physics knowledge related to the lever structure, when the driving rope is perpendicular to the rocker pedal 3, the moment arm of the force exerted by the driving rope on the rocker pedal 3 is the longest, and the driving rope is applied to the rocker pedal 3. The active force on 3 is minimum, and the reaction force that rocker pedal bar 3 is applied on the...

Embodiment 3

[0040] Such as figure 1 As shown, on the basis of the second embodiment, the guide wheel 6 is arranged under the bicycle seat and is slidably connected with the frame 1; the stepless speed regulation bicycle also includes a rope reel 7 and a self-locking device 8; the rope reel 7 is installed on the bicycle handlebar; the rope reel 7 is connected to one end of the self-locking device 8 through a rope, and the other end of the self-locking device 8 is connected to the guide wheel 6 connect.

[0041] The position of the guide wheel 6 can be adjusted more conveniently by setting the rope reel 7 and the self-locking device 8, thereby adjusting the angle between one end of the drive rope and the rocker arm pedal bar 3, that is, the angle between the drive rope and the lever can be adjusted. The length of the moment arm of the fulcrum of the structure; further the transmission ratio of the bicycle can be adjusted; when the bicycle climbs a slope, the position of the guide wheel 6 ...

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PUM

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Abstract

The invention discloses a single-rope stepless speed regulating bicycle. The single-rope stepless speed regulating bicycle comprises a frame and a rear wheel; the stepless speed regulating bicycle further comprises two rocker arm foot bars, a driving rope and a fixed pulley, wherein one ends of the rocker arm foot bars are hinged with the frame; pedals are arranged at the other ends of the rocker arm foot bars; a driven drum and a connecting shaft are arranged at the center of the rear wheel; a left driving hub is mounted at the left end of the connecting shaft; a right driving hub is mounted at the right end of the connecting shaft; and the rocker arm foot bars are used for driving the two driving hubs to rotate through the driving rope so as to drive the bicycle to advance forwards. The single-rope stepless speed regulating bicycle disclosed by the invention has the advantages of self-adaptive stepping travel, no dead work point, labor-saving starting and operation, high driving efficiency, stepless speed variation, large transmission ratio regulating range, simple structure, low production cost and high reliability.

Description

technical field [0001] The invention relates to a bicycle, more precisely a single-rope stepless speed regulation bicycle. Background technique [0002] At present, there are three main transmission designs of bicycles: chain transmission, shaft transmission, and belt transmission. The most common chain drive is mainly composed of pedals, cranks, chains, sprockets, wheels and other components. When the bicycle is riding, the pedaling force is first transmitted to the pedal parts, and then the crank and the sprocket are turned by the pedal shaft to make the wheel rotate, thereby making the bicycle move forward. Compared with shaft drive, belt drive and chain drive, there are only differences in the transmission parts of the force, and they are similar in principle. But no matter what kind of transmission device, it requires the rider to step on the left and right cranks to complete a circular motion to achieve power transmission. However, the structure of human leg muscles ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62M1/28B62M9/06
Inventor 沈嘉诚陈伟平
Owner 沈嘉诚