CN201165313Y

CN201165313Y - Labor-saving accelerating bike

Info

Publication number: CN201165313Y
Application number: CNU2007201299995U
Authority: CN
Inventors: 张义
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-28
Filing date: 2007-12-28
Publication date: 2008-12-17
Anticipated expiration: 2017-12-28

Abstract

The utility model relates to an energy-saving accelerating bicycle. An axle casing for installing foot accelerator levers is arranged at the lower end of the frame of the bicycle. A centre shaft for connecting the two foot accelerator levers is arranged inside the axle casing, and a left annular gear and a right annular gear which are provided with two internal teeth are arranged inside the axle casing; a left shaft and a right shaft of the centre shaft are respectively fixedly connected with the left annular gear and the right annular gear; the axle casing is provided with a radial breach with the opening facing backwards; a chain wheel is arranged inside the axle casing through the breach; the central shaft of the chain wheel is a gear shaft which is provided with external teeth at both ends; two ends of the gear shaft are respectively meshed with the left annular gear and the right annular gear; a chain is connected to the chain wheel inside the axle casing from the breach. The length of the power arms of the foot accelerator levers are 2.6-4.6times the inner diameter of the resistance force arm of the annular gears, so transmission ratio is greatly improved and the bicycle can bring the power to the biggest play without the assistance of outside force, thus reaching the purpose of saving energy and accelerating.

Description

A kind of labor saving acceleration bicycle

Technical field

The utility model relates to a kind of labor saving acceleration bicycle.

Background technology

Traditional transmission mechanism of bicycle is made up of sprocket wheel, flywheel and chain, the length of foot-driven lever is power arm, the radius of sprocket wheel is a resistance arm, the rider puts on foot-operated power by the foot-driven lever driven in rotation, again by chain gear to flywheel, make flywheel drive the bicycle rear rotation, reach the purpose that car load advances.The standard bicycle sprocket radius is bigger, and usually, power arm and resistance arm ratio were at 170: 17～170: 30, and promptly power arm is 1.7 times～2.3 of a resistance arm, because the ratio of power arm and power assistant arm is very little, causes effort.For a long time, people's think of figure changes the bicycle transmitting ratio reaching the labour-saving purpose, the foot-driven lever that just extends, or reduce sprocket radius, or the two size is adjusted simultaneously.But the length of existing prop stand for bicycle treadle is well suited for the needs of the reality that human body moves by bike, and lengthening just is not easy to use again.In addition, because traditional prop stand for bicycle treadle direct connection sprocket wheel, the flywheel that is directly driven on the trailing wheel by sprocket wheel comes powered vehicle, as intending dwindling the radius of sprocket wheel, though can be laborsaving, running velocity can reduce a lot, so that sprocket wheel also should not change is little.Therefore, situation is laborsaving and can not and deposits at a high speed mostly.

Summary of the invention

The purpose of this utility model provides a kind of bicycle labor saving mechanism of driving up, and it can make bicycle not only laborsaving but also improve speed.

The utility model labor saving acceleration bicycle, contain front-wheel, trailing wheel, vehicle frame, left and right foot-operated assembly and the transmission device of forming by sprocket wheel, flywheel and chain, the lower end of vehicle frame is provided with the central siphon of installation foot treadle, be provided with the axis that connects two foot-driven levers in the central siphon, wherein, two internally toothed annuluss that contain internal tooth about being provided with in the said central siphon, said axis comprises left and right diaxon, and this left and right diaxon is captiveed joint with left and right internally toothed annulus respectively; Said central siphon is provided with an opening radially gap backward, and sprocket wheel is located at by gap and is contained in the central siphon, and the center shaft of sprocket wheel is the tooth axle that two ends are provided with external tooth, and tooth axle two ends link to each other with left and right internally toothed annulus engagement respectively; Chain is connected with sprocket wheel in the central siphon from gap.The external diameter of tooth axle is 1: 2.5～1: 4 with the ratio of the internal diameter of internally toothed annulus, and the internal diameter of said internally toothed annulus is 3～6cm, and the central siphon internal diameter is 6-15cm.

Said sprocket wheel is positioned at the position that takes over, central siphon middle part, and the gap position of central siphon is corresponding with it.

Said left and right internally toothed annulus and tooth axle are respectively equipped with bearing;

Two internally toothed annuluss are installed in the bearing case with separately the gear ring bearing and the tooth axle bearing of homonymy respectively.

Said left side axle is to be connected with internally toothed annulus and to hold concurrently by axillare to be the bearing case cover plate with right axle.

Said central siphon two ends are provided with stifle, are provided with steel ball between stifle and cooresponding left side axle or the right axle.

The foot-driven lever of this bicycle drives left and right internally toothed annulus rotation by left and right axle, internally toothed annulus by engaged transmission to the tooth axle, thereby make the sprocket wheel rotation, sprocket wheel drives flywheel by chain, and bicycle is advanced.The power arm foot-driven lever length of this bicycle is 2.6～4.6 of resistance arm internally toothed annulus internal diameter size, and gear ratio value improves greatly, under the situation by external force not, makes the merit of being done perform to maximum, reaches and quickens and the labour-saving purpose.

Description of drawings

Fig. 1 is the A-A amplification view of the central siphon inner structure of this bicycle.

Fig. 2 is the whole structure scheme drawing of this labor saving acceleration bicycle.

Among the figure, 1-axis, 1-1-axis axillare, 2-stifle, 3-gear ring, 4-bearing case, 5-central siphon, 5-1-central siphon gap, 6-sprocket wheel, 7-jump ring, 8-tooth axle bearing, 9-gear ring bearing, 10-screw, 11-tooth axle, the 12-ball, 13-clamp ring, 14-foot-driven lever, 15-chain, 16-flywheel, 17-vehicle frame.

The specific embodiment

Below in conjunction with Fig. 1 and Fig. 2 example structure of the present utility model is described.

Fig. 1 is the A-A sectional structure chart of Fig. 2, and the right side of Fig. 1 and Fig. 2 is the working direction of bicycle, and the upper and lower side among Fig. 2 is represented the left and right side of bicycle respectively.From visible central siphon 5 of Fig. 1 and the interior structure of pipe, central siphon 5 rear sides are provided with radially gap 5-1 (being the trailing wheel direction of gap towards bicycle), sprocket wheel 6 is fixed on the tooth axle 11 by jump ring 7, tooth axle 11 is by the external tooth at two ends and the internal gearing of left and right two internally toothed annuluss 3, the diameter of tooth axle 11 is much smaller than the internal diameter of gear ring 3, the two eccentric engagement links to each other, it is the central axis rear side that the central axis of tooth axle 11 is positioned at internally toothed annulus 3 and central siphon 5, thereby, sprocket wheel 6 also is eccentric the setting in central siphon 5, and chain 15 is connected by gap 5-1 and central siphon 5 interior sprocket wheels 6.Left and right two foot-driven levers 14 are captiveed joint with left and right internally toothed annulus 3 by the axillare 1-1 of left and right two axis 1 respectively, left and right two internally toothed annuluss 3 are installed in the bearing case 4 with separately the gear ring bearing 9 and the tooth axle bearing 8 of homonymy respectively, two bearings shell 4 is captiveed joint with central siphon 5 by screw 10, and axillare 1-1 holds concurrently and is the cover plate of bearing case 4.

Sprocket wheel 6 is positioned at the position that takes over, central siphon 5 axial middle parts, and the gap 5-1 position of central siphon is corresponding with it.

When trampling 1 rotation of foot-driven lever 14 drive axis, internally toothed annulus 3 is with axillare 1-1 rotation, and the tooth axle 11 that is engaged with simultaneously drives sprocket wheels 6 rotations, and sprocket wheel 6 is transferred to dart by chain 15 takes turns 16, advances thereby drive bicycle.

Among Fig. 2, central siphon 5 slightly larger in diameter that are positioned at cycle frame 17 lower ends are in the central siphon of standard bicycle, and in this example, the internal diameter of central siphon 5 is 7.8cm, and sprocket wheel 6 diameters are 6cm.

Sprocket wheel 6 is according to the size of size, all or large part in central siphon 5, be connected with chain 15 between sprocket wheel 6 and the flywheel 16.By the speed change between internally toothed annulus and the little tooth axle, than being greatly improved on the present bicycle speed.

Claims

1. labor saving acceleration bicycle, contain front-wheel, trailing wheel, vehicle frame, left and right foot-driven lever and the transmission device of forming by sprocket wheel, flywheel and chain, the lower end of vehicle frame is provided with the central siphon of installation foot treadle, be provided with the axis that connects two foot-driven levers in the central siphon, it is characterized in that two internally toothed annuluss that contain internal tooth about being provided with in the said central siphon, said axis comprises left and right diaxon, and this left and right diaxon is captiveed joint with left and right internally toothed annulus respectively; Said central siphon is provided with an opening radially gap backward, and sprocket wheel is located at by gap and is contained in the central siphon, and the center shaft of sprocket wheel is the tooth axle that two ends are provided with external tooth, and tooth axle two ends link to each other with left and right internally toothed annulus engagement respectively; Chain is connected with sprocket wheel in the central siphon from gap.

2. labor saving acceleration bicycle according to claim 1, the internal diameter that it is characterized in that said internally toothed annulus is 3～6cm.

3. labor saving acceleration bicycle according to claim 1, the external diameter that it is characterized in that the tooth axle is 1: 2.5～1: 4 with the ratio of the internal diameter of internally toothed annulus.

4. labor saving acceleration bicycle according to claim 1 is characterized in that the central siphon internal diameter is 6-15cm.

5. labor saving acceleration bicycle according to claim 1 is characterized in that said left and right internally toothed annulus and tooth axle are respectively equipped with bearing.

6. labor saving acceleration bicycle according to claim 1 is characterized in that said two internally toothed annuluss are installed in the bearing case with separately the gear ring bearing and the tooth axle bearing of homonymy respectively.

7. labor saving acceleration bicycle according to claim 1 is characterized in that said left side axle is to be connected with internally toothed annulus by axillare with right axle, and axillare is held concurrently and is the bearing case cover plate.

8. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described labor saving acceleration bicycles, it is characterized in that said central siphon two ends are provided with stifle, be provided with steel ball between stifle and cooresponding left side axle or the right axle.