CN2631918Y

CN2631918Y - Portable bicycle

Info

Publication number: CN2631918Y
Application number: CN 03227862
Authority: CN
Inventors: 张光华
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-10
Filing date: 2003-06-10
Publication date: 2004-08-11
Anticipated expiration: 2013-06-10

Abstract

The utility model discloses a portable bicycle, the length and height of which can be adjusted randomly, and is suitable for not only adults but also children. A retractable crossbar is included in the model, connecting and fixing the front steel tube and the rear steel tube, extends to the rear end of the rear steel tube; the front beam connecting with the front steel tube can be inserted into the rear beam connected with the rear steel tube, thus greatly shortening the body of the bicycle; the transmission system consists of four chain wheels and two chain ropes, wherein two of the four chain wheels are installed to the two ends of the end axle of the connecting piece which is in a upside-down-U shape; the other big chain wheel is installed on the one side of the rotary treadle axle and is in the same side of the small chain wheel on the end axle of the connecting piece which is in a upside-down-U shape; the two pairs of chain wheels realize the higher speed of the small wheels with high speed ratio. The utility model has the advantages of a simple structure, high speed, a small and light volume, and convenient carrying.

Description

A kind of portable bicycle

Technical field

The utility model relates to a kind of bicycle, especially a kind of portable bicycle.

Background technology

Bicycle is the vehicle that people use always, existing bicycle is because the speed of a motor vehicle is relevant with the size of wheel, general used wheel is all bigger, the people that can not adapt to various all ages and classes and height uses, and it is quite heavy, the people that stay in the building high level it will be mentioned upstairs in the family or to carry the other places all inconvenient, and hope can have a kind of portable bicycle.Existing Folding Bicycle, owing to will reach certain speed of a motor vehicle, just two are folded than big wheel and cross member of frame, perhaps also that the front hand grip expansion link is folding, can not be by people's regulated at will length at different height and age and height, and structure is still complicated, volume is still big, weight is still heavier, it is still convenient inadequately to carry.

The utility model content

The purpose of this utility model be to provide a kind of simple in structure, but the speed of a motor vehicle is fast, volume is little, regulated at will length in light weight, easy to carry, just, both can be adapted to man, women adult and also can adapt to the portable bicycle that children use.

Before the utility model comprises, rear wheel and wheel shaft, the fixedly preceding steel pipe and the support of front vehicle wheel, the collapsible expansion link and the registration device thereof that link to each other with preceding steel pipe, pluggable free handle bar and registration device thereof, rotate pedal rod and axle thereof, collapsible pedal, plug-in type seat cushion expansion link and seat cushion and registration device thereof, the fixedly back steel pipe and the registration device thereof of seat cushion expansion link, with rear vehicle shaft and handle bar bonded assembly brake gear, it is characterized in that, be provided with connect and fixing before steel pipe and back steel pipe and extend to the scalable crossbeam of steel pipe rear end, back, wherein the front cross rail that links to each other with preceding steel pipe can insert in the after cross member that links to each other with the back steel pipe, vehicle body is dwindled greatly, scalable crossbeam can be various geometric configuratioies, but be preferably rectangular tube, there is a slice spacer the front cross rail rear end, front cross rail can not deviate from from after cross member, the after cross member inwall be provided with can fastening front cross rail the location connecting plate, there is a kick to reach in the hole of after cross member outer wall on this connecting plate and plays fixation, the after cross member outer wall also is provided with the fastening screw of fixing front and back crossbeam in addition, can be according to the size and the length of adult or child's height different adjustment car, and two crossbeams can not become flexible and deviate under steam, also near the after cross member the steel pipe of back, be provided with an inverted U attaching parts, be provided with a connection shaft in two ends of this inverted U attaching parts; Transmission device realized by four sprocket wheels and two chains, and two in four sprocket wheels are installed in inverted U attaching parts connection shaft two ends, and one is minor sprocket, and another is a hinge wheel; A hinge wheel in addition is installed in a side of rotating the pedal axle, and with the minor sprocket homonymy that is installed on the inverted U attaching parts connection shaft, also have a minor sprocket be mounted in rear vehicle shaft a side and with the hinge wheel homonymy that is installed in inverted U attaching parts connection shaft, two chains are connected the minor sprocket of two groups of homonymies respectively with hinge wheel.Realize making trundle reach the purpose of the high speed of a motor vehicle by the different sizes of these two pairs of sprocket wheels with large speed ratio.Between the rear end of after cross member two sides and rear vehicle shaft two ends, be provided with the fixedly fixed connection apparatus of the inverted U of rear wheel, a cross bar is arranged again between the anchor fitting of this inverted U and be fixed on the after cross member.

Two limits of the anchor fitting of two inverted Us are connected and fixed again, make car more firm when running at high speed.The after cross member of back steel pipe front end with afterwards be provided with handle shape fixed connecting piece between the steel pipe, this handle shape fixed connecting piece plays the effect of supporting back steel pipe and seat cushion expansion link on the one hand, can be used as the handle of mentioning bicycle on the other hand again, the after cross member of steel pipe rear end, back with afterwards also be provided with a curvilinear figure anchor fitting between the steel pipe, it can support the effect of seat cushion expansion link and human body gravity.

But this bicycle structure is simple, the speed of a motor vehicle is fast, volume is little, regulated at will length in light weight, easy to carry and the height, both can be adapted to the man, woman adult also can adapt to children and use, the speed of a motor vehicle is also faster than the speed of a motor vehicle of existing big bicycle, can very like a cork it be mentioned upstairs or on the bus or carry tourist site.

Description of drawings

Fig. 1 is the utility model overall structure scheme drawing;

Fig. 2 is four chain sprocket structure scheme drawings of the utility model;

Fig. 3 is two inverted U fixed connection apparatus of the utility model structural representation.

The specific embodiment

In conjunction with the accompanying drawings:

Present embodiment comprises front vehicle wheel 1, rear wheel 2, the diameter of these two wheels has only 200mm, the wheel shaft 3 of wheel-mounted, the fixedly preceding steel pipe 4 of front vehicle wheel and support 5, collapsible expansion link 6 that links to each other with preceding steel pipe and registration device 7, the registration device of present embodiment adopts the eccentric Luo silk of outer folding, plug-in type free handle bar 8 and registration device 7, the registration device of present embodiment adopts the eccentric Luo silk of outer folding, rotate pedal rod 9 and axle 10 thereof, collapsible pedal 33, plug-in type seat cushion expansion link 11 and seat cushion 12 and registration device 7, the fixedly back steel pipe 13 of seat cushion expansion link and registration device 7, with rear vehicle shaft 3 and handle bar 8 bonded assembly brake gears 32, it is characterized in that being provided with connect and fixing before steel pipe and back steel pipe and extend to the scalable crossbeam 14 of steel pipe rear end, back, the front cross rail 14a that links to each other with preceding steel pipe can insert among the after cross member 14b that links to each other with the back steel pipe, vehicle body is dwindled greatly, the crossbeam of present embodiment is a hollow rectangle, material is a thick steel pipe, there is a slice spacer 15 front cross rail 14a rear end, the after cross member inwall be provided with can fastening front cross rail location connecting plate 16, there is a kick to reach in the hole 31 of after cross member outer wall on this connecting plate, play fixation, the after cross member outer wall also be provided with fixing before and after the fastening screw 17 of crossbeam, can be according to the size and the length of adult or child's height different adjustment car; And two crossbeams can not deviate under steam.On near the after cross member the steel pipe of back, be provided with an inverted U attaching parts 18, be provided with a connection shaft 19 in the end of this inverted U attaching parts.Transmission device is realized by four sprocket wheels and two chains, two two ends that are mounted in inverted U attaching parts connection shaft in four sprocket wheels, one is minor sprocket 20, another is a hinge wheel 21, a hinge wheel 22 in addition is installed in a side of rotating pedal axle 10, and with minor sprocket 20 homonymies that are installed on the inverted U attaching parts connection shaft, also have a minor sprocket 24 be installed in rear vehicle shaft 3 a side and with hinge wheel 21 homonymies that are installed in inverted U attaching parts connection shaft; Article two, a 23a in the chain is connected the minor sprocket 20 of homonymy with hinge wheel 22, and another chain 23b is connected the hinge wheel 21 of homonymy with minor sprocket 24.Different sizes by these two pairs of sprocket wheels are realized with at a high speed than making trundle reach the purpose of the high speed of a motor vehicle.The speed of a motor vehicle of present embodiment is also faster than the speed of a motor vehicle of existing big bicycle.Between the rear end of after cross member 14b two sides and rear vehicle shaft 3 two ends, be provided with the fixedly inverted U fixed connection apparatus 26 of rear wheel.A cross bar 27 is arranged again between the anchor fitting of this inverted U and be fixed on the after cross member.

Inverted U attaching parts 18 respectively is provided with the connecting element 28 that is connected two inverted U attaching partss with two limits of inverted U fixed connection apparatus 26, makes car more firm when running at high speed.The after cross member 14b of back steel pipe front end with afterwards be provided with handle shape fixed connecting piece 29 between the steel pipe 13, this handle shape fixed connecting piece plays the effect of supporting back steel pipe and seat cushion expansion link on the one hand, can be used as the handle of mentioning bicycle on the other hand again, the after cross member 14b of steel pipe rear end, back with afterwards also be provided with a curvilinear figure fixed connection apparatus 30 between the steel pipe 13, it can support seat cushion expansion link and human body gravity.

This bicycle not the time spent with in plug-in type free handle bar 8 tubular stingers, plug-in type seat cushion expansion link 11 and seat cushion 12 are released, and hang on the hook of preceding steel pipe, the front cross rail 14a that will link to each other with preceding steel pipe inserts among the after cross member 14b that links to each other with the back steel pipe, the collapsible expansion link 6 and the collapsible pedal 33 that will link to each other with preceding steel pipe 4 fold, and vehicle body just dwindles greatly.It is 58 centimetres that present embodiment can narrow down to length, highly is 38 centimetres, and weight only is several kilograms.Can be during use according to the length and the height of all ages and classes and height human needs regulated at will vehicle body, as long as the front cross rail 14a that will be inserted among the after cross member 14b this moment releases, the fastening screw 17 of crossbeam fixedly is a scalable length before and after will fixing on demand; Again plug-in type free handle bar 8 and plug-in type seat cushion expansion link 11 are elongated, simultaneously with registration device 7 location, i.e. scalable height.

Claims

1. portable bicycle, comprise front vehicle wheel (1), rear wheel (2) and dress wheel shaft (3), the fixedly preceding steel pipe (4) of front vehicle wheel and support (5), collapsible expansion link (6) that links to each other with preceding steel pipe and registration device (7), plug-in type free handle bar (8) and registration device (7), rotate pedal rod (9) and axle (10) thereof, collapsible pedal (33), plug-in type seat cushion expansion link (11) and seat cushion (12) and registration device (7), the fixedly back steel pipe (13) of seat cushion expansion link and registration device (7), with rear vehicle shaft (3) and handle bar (8) bonded assembly brake gear (32), it is characterized in that being provided with connect and fixing before steel pipe and back steel pipe and extend to the scalable crossbeam (14) of steel pipe rear end, back, the front cross rail (14a) that links to each other with preceding steel pipe can insert in the after cross member (14b) that links to each other with the back steel pipe, front cross rail (14a) rear end have a slice spacer (15) after cross member inwall be provided with can fastening front cross rail location connecting plate (16), the after cross member outer wall is provided with the fastening screw (17) of fixing front and back crossbeam, on near the after cross member the steel pipe of back, be provided with an inverted U attaching parts (18), be provided with a connection shaft (19) in the end of this inverted U attaching parts, transmission device is realized by four sprocket wheels and two chains, two two sides that are mounted in inverted U attaching parts connection shaft in four sprocket wheels, one is minor sprocket (20), and another is hinge wheel (21); A hinge wheel (22) in addition is installed in a side of rotating pedal axle (10), and with minor sprocket (20) homonymy that is installed on the inverted U attaching parts connection shaft, also have a minor sprocket (24) be mounted in rear vehicle shaft (3) a side and with the hinge wheel that is installed in inverted U attaching parts end axis (21) homonymy, article two, the minor sprocket (20) of (23a) each homonymy in the chain is connected with hinge wheel (22), another chain (23b) is connected the hinge wheel (21) of homonymy with minor sprocket (24), be provided with the fixedly inverted U fixed connection apparatus (26) of rear wheel between the rear end of after cross member (14b) two sides and rear vehicle shaft (3) two ends.

2. portable bicycle according to claim 1 is characterized in that having a kick to reach in the hole of after cross member outer wall (31) on the location connecting plate (16) of after cross member inwall.

3. portable bicycle according to claim 1 is characterized in that between the anchor fitting (26) of inverted U a cross bar (27) being arranged and being fixed on the after cross member (14b).

4. portable bicycle according to claim 1 is characterized in that inverted U attaching parts (18) respectively is provided with the connecting element (28) that is connected two inverted U attaching partss with two limits of inverted U fixed connection apparatus (26).

5. according to claim 1 or 2 or 3 or 4 described portable bicycles, it is characterized in that the after cross member (14b) of back steel pipe front end with afterwards be provided with a handle shape fixed connecting piece (29) between the steel pipe (13).

6. according to claim 1 or 2 or 3 described portable bicycles, it is characterized in that the after cross member (14b) of steel pipe rear end, back with afterwards be provided with a curvilinear figure fixed connection apparatus (30) between the steel pipe (13).