CN2686991Y - Foldable bicycle - Google Patents

Abstract

The utility model discloses a foldable bicycle. One end of a supporting seat on a five-way tube which is communicated with pedals and a chain dish is hinged with a caster wheel which can rotate up and down. The caster wheel rotates upwards in riding the bicycle, and the caster wheel rotates downwards in dragging the bicycle. The caster wheel comprises rollers which are mutually connected, a wheel carrier and a wheel carrier shaft, the wheel carrier shaft of the caster wheel is inserted in the wheel carrier, and the wheel carrier and the wheel carrier shaft can rotate oppositely. The bicycle seat needs not lifting again in dragging the bicycle, so the utility model is easy and convenient and avoids that the chain dish part of the pedals touches the earth and is damaged in dragging. The wheel carrier of the caster wheel can be swung toward the left and the right and is convenient to turn.

Description

Folding Bicycle

Technical field

The utility model relates to a kind of Folding Bicycle.

Background technology

The joint of the folding stand of Folding Bicycle is on the girder of car load central authorities usually.Behind this bicycle folding, front and back wheel is closed up in the rear, and the center of gravity of car load leans forward, and contacts to earth forward in foot-operated chain drum position.Therefore, when the bicycle after folding is towed on ground, must mention vehicle seat, move after making the car load center of gravity, in order to avoid foot-operated chain drum position is contacted to earth impaired in towing.The mode that tows of this bicycle is promptly required great effort and is extremely inconvenient.

Summary of the invention

The purpose of this utility model is to provide a kind of Folding Bicycle of foot wheel, can tow easily behind this bicycle folding, not only laborsaving but also be convenient to controlling party to.

A kind of Folding Bicycle described in the utility model, with an end of bearing on the five-way pipe that foot-operated and chain drum are communicated with hinged one can change go up under state, the commentaries on classics by bike for towing the state caster wheel.

Described castor is made of interconnective roller, wheel carrier and wheel carrier sleeve, and the wheel carrier sleeve of castor inserts in the wheel carrier, and wheel carrier and wheel carrier sleeve can relatively rotate.

The utility model has been newly established a castor on the five-way pipe at bicycle pedals chain drum position.By bike the time, this castor is rotated to the top, the position of rigid castors automatically under the thrust of spring or tightening force.When towing, adduct together front and back wheel is folding, simultaneously middle caster wheel is put down, form front and back wheel, can easily car load be towed.Needn't mention vehicle seat again when towing, both easy and convenient, avoided foot-operated chain drum position in towing, to contact to earth impaired again.The wheel carrier of described castor also can swing, and is convenient to turn to.

Description of drawings

Fig. 1 is the folding preceding scheme drawing of an embodiment of the present utility model.

Fig. 2 is the enlarged diagram at castor position among Fig. 1.

Fig. 3 is the schematic perspective view at caster wheel shown in Figure 1 position.

Fig. 4 is the scheme drawing after the utility model folds.

Fig. 5 is the side schematic view of Fig. 4.

Fig. 6 is the enlarged diagram at another embodiment caster wheel position.

The specific embodiment

Embodiment one

A kind of Folding Bicycle described in the utility model, as shown in Figure 1, with foot-operated 1 and chain drum 2 bonded assembly five-way pipes 3 on hinged one of the end of bearing 45 can rotate caster wheel 4 up and down.As shown in Figures 2 and 3, this castor 4 is made of interconnective roller 41, wheel carrier 42 and wheel carrier sleeve 43, and the top of wheel carrier sleeve 43 is contained in by rotating shaft 44 in the bearing 45 of five-way pipe 3 one ends, and it is rotatable that wheel carrier 42 tops have axle to insert in the wheel carrier sleeve 43.The both sides up and down of bearing 45 are for there being plane of orientation 46, and wheel carrier sleeve 43 tops are plane 47, and two plane contact when the castor liter forwards the top to are compressed by spring 48.The locating dowel pin 49 that the restricted wheel carrier sleeve 43 of the downside of bearing 45 rotates backward, upside has limited step 50.

As depicted in figs. 1 and 2, castor 4 can rotate up and down.In the time of by bike, castor 4 is rotated clockwise to the top cant beam, utilizes the position of plane of orientation 46 automatic rigid castors 4 under the thrust of spring 48 of bearing 45.When towing, as shown in Figure 4 and Figure 5, front-wheel 5 and trailing wheel 6 are folded, simultaneously castor 4 conter clockwises are put down,, form front and back wheel, can easily car load be towed with the position of locating dowel pin 49 rigid castors 4.As shown in Figure 5, an end of castor 4 links on the bearing on the five-way pipe 3 45, these five-way pipe 3 connection foot-operated 1 and chain drums 2.

Embodiment two

A kind of Folding Bicycle described in the utility model, as shown in Figure 1, with foot-operated 1 and chain drum 2 bonded assembly five-way pipes 3 on hinged one of the end of bearing 45 can rotate caster wheel 4 up and down.As Fig. 3 and shown in Figure 6, this castor 4 is by interconnective roller 41, and wheel carrier 42 and wheel carrier sleeve 43 constitute, and the top of wheel carrier sleeve 43 is contained in the bearing 45 of five-way pipe 3 one ends by rotating shaft 44, pin 51, two 51 of pins are housed on wheel carrier sleeve 43 and bearing 45 fix an extension spring 52.Bearing 45 is equipped with two locating dowel pins 49.

As Fig. 1 and shown in Figure 6, castor can rotate up and down.In the time of by bike, castor 4 is rotated clockwise to the top cant beam, utilizes the tightening force effect of extension spring 52 of 51 of two pins and the position of locating dowel pin 49 automatic rigid castors 4.When towing, as shown in Figure 4 and Figure 5, front-wheel 5 and trailing wheel 6 are folded, simultaneously castor 4 conter clockwises are put down, utilize the tightening force effect of extension spring 52 of 51 of two pins and the position of locating dowel pin 49 automatic rigid castors 4, the formation front and back wheel can tow car load easily.As shown in Figure 5, an end of castor 4 is hinged on the bearing 45 on the five-way pipe 3.This five-way pipe 3 is communicated with steps on the back of the body 1 and chain drum 2.

Claims (6)

1, a kind of Folding Bicycle is characterized in that: with a near end of bearing (45) the five-way pipe (3) that foot-operated (1) and chain drum (2) are communicated with hinged one can change go up under state, the commentaries on classics by bike for towing state caster wheel (4).

2, Folding Bicycle according to claim 1 is characterized in that: castor (4) is made of interconnective roller (41), wheel carrier (42) and wheel carrier sleeve (43), and it is rotatable that wheel carrier (42) top has axle to insert in the wheel carrier sleeve (43).

3, Folding Bicycle according to claim 2 is characterized in that: the both sides up and down of bearing (45) are for there being plane of orientation (46), and wheel carrier sleeve (43) top is plane (47), and two plane contact when the castor liter forwards the top to are compressed by spring (48).

4, Folding Bicycle according to claim 3 is characterized in that: the locating dowel pin (49) that the restricted wheel carrier sleeve of the downside of bearing (45) (43) rotates backward, upside has limited step (50).

5, Folding Bicycle according to claim 2 is characterized in that: on wheel carrier sleeve (43) and bearing (45) pin (51) is housed, fixes an extension spring (52) between two pins (51).

6, Folding Bicycle according to claim 5 is characterized in that: bearing (45) is equipped with two locating dowel pins (49).

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