CN2161555Y - Double-speed bicycle - Google Patents

Abstract

The utility model belongs to a new bicycle product, which is based on a common hand brake bicycle; the transmission system is reformed, a double flywheel with two wheel discs with different tooth numbers is used to replace the original flywheel, a chain steering wheel is arranged on the rear frame of the bicycle, and a special chain hanging mode is adopted, so that the double-speed bicycle with two transmission speed ratios is formed. The rider can select between speed and force according to the road condition and the condition of the rider.

Description

Bicycle with speed variator

The utility model belongs to the bicycle new product.

Existing coventional type transmission mechanism of bicycle is single speed ratio (being 46:20).It is relatively poor to the road adaptive capacity to ride.Meet long slope more than 15 ° and ride and just have any problem when riding in flat road surface, the speed of a motor vehicle reaches 460 meters/timesharing, and people's leg motion frequency does not catch up with the speed of a motor vehicle, just can't improve the speed of a motor vehicle yet.

The purpose of this utility model is that a kind of round trip flight wheel mechanism will be provided, and it can improve coventional type rim brake bicycle to the road adaptive capacity by actv..

The purpose of this utility model is achieved in that based on coventional type rim brake bicycle, reforms its driving system.Replace former flywheel with a round trip flight wheel mechanism (critical component of the present utility model) that has two different number of teeth wheel discs, add a chain wheel flutter, the double speed that adopts special chaining mode to form compares bicycle.When riding,, just produced two kinds of speed and corresponding output torque and selected, deacclimatized road conditions for the bicyclist as long as step pedal forward or backward.

The utility model double speed cycling is convenient: do not increase any operating sequence when riding, only change bipod and step direction, just can obtain speed changing effect.This car adapts to the road conditions better performances: use high speed than transmission during level road, though output torque is little, speed of advance is fast.Use low speed than transmission during upward slope, increase output torque, improved hill climbing ability.This double speed bicycle also can be produced the round trip flight wheel of several speed ratio groups according to area (Plain, hills) road and bicyclist's's (strong, weak) situation, is contained on the bicycle, just forms a serial bicycle.Supply and marketing expense person selects.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is according to double speed bicycle and the driving system scheme drawing that the utility model proposes.

Describe in detail according to concrete device details and the service condition that the utility model proposes below in conjunction with Fig. 1.

This car be by common rim brake voluntarily car body and improve after driving system constitute, driving system comprises axis sprocket wheel (1), by the round trip flight wheel (2) that large and small two wheel discs can be done in the same way on concentric shafts, unidirectional slip is formed, chain wheel flutter (3) is fixed on the rear bicycle frame by wheel flutter support (4), and the elasticity that is used for aligning chain, adopt the chain (5) of special chaining mode to form.Special chaining mode is that chain is hung over earlier on the sprocket wheel (1), around wheel draw two ends be hung in round trip flight wheel (2) large and small chain sprocket above, after wheel causes the upper and lower both sides of wheel flutter (3) third wheel from below, dock then.

When sprocket wheel (1) when forward (as icon) rotates under the effect of the foot-operated power of bicyclist, round trip flight wheel (2) is gone up big trochal disc and drive the rear wheel forward rotation under the drive of chain (5) during work.Drive and sail bicycle and advance.The small trochal disc reverse slide is crossed chain.This moment is because big trochal disc is big, so the relative small trochal disc of transmitting ratio is low, so speed of advance is slow, but output torque is big, is applicable to cycling start and up-hill journey.When sprocket wheel (1) under the effect of the foot-operated power of bicyclist during backward rotation, round trip flight wheel (2) is gone up small trochal disc and drive the rear wheel forward rotation under the drive of chain (5).Drive and sail bicycle and advance.The big trochal disc reverse slide is crossed chain.At this moment because small trochal disc is little, so the relative big trochal disc height of transmitting ratio, speed of advance is fast.Adaptation is at flat pavement running.The bicyclist just can select in speed with firmly according to road conditions and the condition of itself like this.

Claims (2)

1, a kind of double speed bicycle, car body and driving system two parts constitute voluntarily by common rim brake for it, it is characterized in that rear axle wheel disc in the driving system be adopt by large and small two wheel discs on concentric shafts, can do respectively in the same way, the round trip flight wheel (2) of unidirectional slip, this driving system also comprises by wheel flutter support (4) and is fixed on the chain wheel flutter (3) on the car after-frame and adopts the chain (5) of special chaining mode.

2, double speed bicycle as claimed in claim 1, it is characterized in that special chaining mode is that chain (5) two ends on hanging axis sprocket wheel (1) are guided to respectively above large and small two wheel discs of round trip flight wheel (2), guides to the upper and lower both sides of wheel flutter (3) around the butt joint of wheel back around wheel disc from below.

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