CN2463284Y - Bicycle - Google Patents

Abstract

The utility model relates to a bicycle which is composed of a frame, wheels and a driving part, wherein a fulcrum is positioned on a rear lower fork in front of the driving part, both sides of a chain wheel of the driving part are respectively provided with free wheels having the same size, and the free wheels are fixed to the rear lower fork with the chain wheel in a coaxial way; the fulcrum is fixed to a lever, a power arm is a multiple of a resistance arm and two foot pedals on the power arm are connected by a rope through a pulley. Because the foot pedals only do the up-and-down movement and the power arm is longer than the resistance arm, drivers can complete the left and right power cycle transference without pedaling a lower dead point; therefore, the utility model has the labour saving effect.

Description

A kind of bicycle

The utility model relates to a kind of rickshaw, particularly a kind of bicycle.

Present commercially available ordinary bicycle runs into upward slope then very requires great effort, and the labor-saving effect is also not obvious after the variable speed bicycle speed change.

The purpose of this utility model is to provide a kind of labor-saving effect tangible bicycle.

The technical solution of the utility model is to realize like this, a kind of bicycle, by vehicle frame, wheel, running part is formed, fulcrum is positioned on the Chain stay in running part the place ahead, fix resistance arm on it and be several times as much as the power arm of resistance arm, the terminal installation foot pedal of power arm, respectively there are size identical flywheel and the coaxial Chain stay that is fixed in of chain wheel in the chain wheel both sides of running part, chain one end of flywheel links to each other with resistance arm, the other end is fixed on the Chain stay by spring, between the flywheel on chain wheel and the trailing wheel chain is arranged, and between inclined tube and the front fork fixed support is arranged, be equipped with pulley on the fixed support, by pulley two stretchers coupled together by rope.

The utility model is owing to adopt technique scheme, foot-operated only need moving up and down and do not make circular movement, and power arm is longer than resistance arm greatly, and the rider need not to step on bottom dead point can finish left and right sides power circulating transfer, thereby reaches the labour-saving purpose.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a structural representation of the present utility model.

As shown in the figure, bicycle is by vehicle frame, wheel, transmission three parts are formed, fulcrum 1 is positioned on the Chain stay 13 in running part the place ahead, chain wheel 3 both sides of running part respectively have the identical flywheel 2 of size to be fixed on the Chain stay 13 by wheel shaft is coaxial with chain wheel 3, chain 4 one ends of flywheel 2 and resistance arm 17 by the moon generating gear be fixed on the flywheel 2, the other end is welded on the Chain stay 13 by spring 5, between the flywheel 14 on chain wheel 3 and the trailing wheel chain 6 is arranged, power arm 15 is levers of likeness in form soupspoon with resistance arm 17, and power arm 15 is several times as much as resistance arm 17, by fulcrum 1 lever is fixed on down back vent 13, power arm 15 terminal installation foot pedals 10, the fixed support 16 of square is arranged between inclined tube 11 and the front fork 12, be equipped with pulley 8 on it, by pulley 8 two stretchers 10 are coupled together by rope 9.Like this, the rider in 10 cocycles of two stretchers firmly, power arm 15 drives flywheel 2 by resistance arm 17, flywheel 2 drives coaxial chain wheel 3, chain wheel 3 drives flywheel 14 by chain 6, flywheel 14 drives trailing wheel and travels forward, and the chain 4 on the flywheel 2 is controlled flywheels 2 circulation returns by spring 5, and the rider need not to step on bottom dead point can finish left and right sides power circulating transfer.For the better the utility model of realizing, can be under such scheme unmodified situation, front fork 12 can be installed commercially available shock-absorbing part with Seat stay 7, and simultaneously, front-wheel and stretcher 10 collisions when avoiding turning of bicycle can suitably dwindle the front-wheel radius.

Claims (1)

1. bicycle, by vehicle frame, wheel, running part is formed, it is characterized in that: fulcrum (1) is positioned on the Chain stay (13) in running part the place ahead, fix resistance arm (17) on it and be several times as much as the power arm (15) of resistance arm (17), the terminal installation foot pedal of power arm (15) (10), respectively there are size identical flywheel (2) and the coaxial Chain stay (13) that is fixed in of chain wheel (3) in the chain wheel of running part (3) both sides, chain (4) one ends of flywheel (2) link to each other with resistance arm (17), the other end is fixed on the Chain stay (13) by spring (5), between the flywheel (14) on chain wheel (3) and the trailing wheel chain (6) is arranged, between inclined tube (11) and the front fork (12) fixed support (16) is arranged, be equipped with pulley (8) on the fixed support (16), by pulley (8) two stretchers (10) are coupled together by rope (9).