CN2517656Y - Portable bicycle - Google Patents

Abstract

The utility model relates to a portable bicycle. The prior chain driving bicycle is changed into gear driving, the driving elastic piece on a right pedal limp drives a driving gear, and a rear wheel is driven forward through a front driving gear, a driving axle and a rear driving gear. The gear driving has the purpose to improve the driving speed ratio, and to decrease the front wheel and the rear wheel, and when the driving speed ratio is 1 to 15, the semi diameter of the front wheel and the rear wheel can be decreased to 90 mm, and the speed can be kept at 30 km per hour. The bicycle body is folded multi-directionally. The supporting part is folded along a load-bearing frame, and the pedal and a bicycle handle are folded transversely, through simplifying and folding the bicycle body, the portable bicycle can be carried, and is easy for storing.

Description

Portable bicycle

The utility model relates to a kind of bicycle, and it is can fold portable bicycle by gear transmission.

Present traditional bicycle, the body construction complexity, weight is big, and volume is big, as common 28# bicycle, must or increase support frame with spider and support car body, because the car body heaviness, not only require great effort but also dangerous in the time of by bike, can not carry during trip, not easy to store yet.

The utility model is that a kind of portable bicycle will be provided, and not only volume is little for it, and is in light weight, and portability, easy to store.

The purpose of this utility model is achieved in that portable bicycle, adopt gear transmission, the driving shell fragment that driving gear is turned by right pedal drives, by preceding transmission gear, transmission shaft and final drive gear, drive rear wheels turns round forward, gear-driven purpose is to improve the transmission speed ratio, in transmission speed is 1: 15 o'clock, and the radius R of front and back wheel can be reduced into 90mm, and speed can keep 30 kilometers/hour.The brake of portable bicycle is located between driving gear and the linkage frame, driving gear is a slide teeth, and rear wheel and final drive gear are for often closing tooth, when brake facing friction driving gear, braking force acts on and realizes brake on the rear wheel by preceding transmission gear, transmission shaft and final drive gear.Its folded part is multidirectional folding, vehicle seat bracket vibration damping device, direction lever and linkage frame are folding along the bearing frame direction, and be all parallel with bearing frame, and two handlebars are pulled out folding 90 ° downwards, direction lever is withdrawn downwards, two pedals launch downwards to turn parallelly with pedal, and left foot is pedaled to turn and turned direction to right pedal and fold 180 °, turns parallel with right pedal, place the position that overlaps with bearing frame, lock by steady arm at the position after folding.By dwindling of front and back wheel, integrally-built variation and folding has reached the purpose of portable bicycle.

Owing to adopted such scheme, simplified the structure of bicycle, saved material, its volume is little collapsible, holds the car travelling and can both carry, and in the block of living and concentrating, the space is little downstairs, can leave in indoor.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is first embodiment of portable bicycle, the front view after the expansion.

Fig. 2 is the front view after the folding of portable bicycle.

Fig. 3 is the I-I section-drawing of Fig. 2.

1 handlebar among the figure, 2 direction levers, 3 direction lever kaysers, 4 linkage frame kaysers, 5 front vehicle wheels, 6 vehicle seats, 7 vehicle seat steady arms, 8 vehicle seat connecting rods, 9 vehicle seat support steady arms, 10 vehicle seat supports, 11 rights crus of diaphragm are stepped on, and 12 right pedals turn, 13 shock absorber kaysers, 14 linkage frame kaysers, 15 brake pedals, 16 shock absorbers, 17 bearing frames, 18 linkage frames, 19 left foots are pedaled and are turned, and 20 left foots are pedaled, 21 rear wheels, 22 driving gears, 23 back axles, 24,38 rear-axle tubes, 25,35 final drive gears, 26,30 transmission shaft bearings, 27 transmission shafts, 28 front axles, 29 preceding axle bearings, 31 preceding transmission gears, 32,34 drive shell fragments, spindle nut in 33,36 back axle bearings, spindle nut before 37,39 preceding spindle nuts, 40 front axle sleeve pipes, 41 bottom bracket bearings, 42 axis, 43 grooved spares.

In Fig. 1, when manpower driving bicycle advances, right pedal turns the driving shell fragment on 12, drive driving gear 22 and rotate, by preceding transmission gear 31, transmission shaft 17 drives final drive gear 25, rear wheel 12 is turned round forward, transmission speed ratio at driving gear 22 and rear wheel 12 is 1: 15 o'clock, and the radius R of front and back wheel is reduced into 90mm, and its speed can reach 30 kilometers/hour.When bicycle coasting, rear wheel 12 drives final drive gears 25, by transmission shaft 17 and preceding transmission gear 31, drives driving gear 22 and slides on axis 42, and at this moment right pedal turns driving shell fragment 32,34 on 12 along the slip of the saw type tooth on the driving gears 22.When portable bicycle folded: handlebar 1 was outwards pulled out folding 90 ° downwards, open 2 withdrawals of direction lever kayser 3 direction levers, opening linkage frame kayser 4 direction levers folds back parallel with linkage frame 18, open shock absorber kayser 13, shock absorber 16 is folding parallel with bearing frame to the bearing frame direction, vehicle seat steady arm 7 lifts and puts down vehicle seat 6, open vehicle seat support steady arm 9, the withdrawal of vehicle seat connecting rod, vehicle seat support 10 is folding parallel with bearing frame to bearing frame 17 directions, open linkage frame kayser 14, linkage frame 18 is folding parallel with bearing frame to bearing frame 17 directions, left foot is pedaled 20 right pedals 11 and is launched downwards to turn parallelly with pedal, and left foot is pedaled and turned 19 and turn 12 directions to right pedal and fold and turn parallelly with right pedal, and two turn and place the position that overlaps with bearing frame.All there is steady arm locking at folding position.

Brake of the present utility model is located on the driving gear, when manpower moves down brake pedal 15, the braking force that brake facing friction driving gear 22 is produced is by preceding transmission gear 31, and transmission shaft 27 and final drive gear 25 act on and realize brake on the rear wheel 21.

In the embodiment that Fig. 3 shows, left foot is pedaled and is turned 19 and be connected with grooved spare 43 1 ends, and grooved spare 43 other ends are fixed on the axis 42 by keyway, when portable bicycle launches, left foot is pedaled and is turned 17 crossheading type spares, 43 Rotate 180s °, left foot is pedaled turn 17 to overlap with the inside groove of grooved spare 43.

Claims (4)

1, a kind of portable bicycle, the large toothed disk that right pedal turns links by chain and small flywheel, rear wheel, it is characterized in that: being provided with one on axis can be from the gear of line slip, right pedal turn and cliding gear between the driving shell fragment is arranged, cliding gear on the axis and a transmission gear are meshing, and transmission gear links by transmission shaft and final drive gear and rear wheel.

2, portable bicycle according to claim 1 is characterized in that: gear one side of sliding on axis has saw type tooth to combine with the driving shell fragment.

3, portable bicycle according to claim 1 is characterized in that: be provided with the brake abrasive disc on the gear that slides on the axis, the brake pedal on abrasive disc one end and the linkage frame links.

4, portable bicycle according to claim 1 is characterized in that: left foot is pedaled and is turned an end and be connected with grooved spare one end, and grooved spare is connected with the axis left end.

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