CN201140758Y

CN201140758Y - Portable folding bicycle

Info

Publication number: CN201140758Y
Application number: CNU2007201530852U
Authority: CN
Inventors: 黄京平
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-13
Filing date: 2007-06-13
Publication date: 2008-10-29
Anticipated expiration: 2017-06-13

Abstract

The utility model discloses a portable folding bicycle, which comprises a built-in gear box for replacing a foot-treading large chain gear, a folding switch is arranged on the position on which the gear box and a back bottom fork are connected, the gear box is arranged in a frame, drive gears are arranged in the gear box, wherein the first is a foot-treading drive gear, and the next is a drive gear, and a change drive gear in turn. A pedal drive shaft is connected with the foot-treading drive gear through holes on the frame, a back drive gear and a front chain wheel are arranged on the front end of the back bottom fork, the back drive gear and the front chain wheel are connected through gear pins, the front chain wheel and a back chain wheel are connected through chains, folding switches are respectively installed on the joint of a seat-coating supporting frame and the frame, on the fork opening position of the front fork and on the front section of the frame, an elastic switch which can regulate the height of a saddle is arranged on the seat-coating supporting frame, and an elastic switch which can regulate the height of a handle is arranged on the upper end of the front fork. The utility model has smaller volume than a common folding bicycle after folded, and is convenient for carrying.

Description

A kind of portable folding bicycle

Technical field

The utility model relates to a kind of bicycle, more specifically to a kind of folding bicycle.

Background technology

At present, the Folding Bicycle that people generally use is the folded in half formula, but its folding principle is to do an open type at central frame beam to connect switch, and its folding process is after the car load folded in half, again the handlebar of adjustable height and seat bag is adjusted to extreme lower position.Its advantage is to have lacked half than the length of general non-Folding Bicycle.Also having a kind of three-bend bicycle at present is to divide the vehicle frame of bicycle three sections to amount to, but its length after folding is just lacked a bit slightly than double folding bike.Its key is that reason is that pin is stepped on big sprocket gear and trailing wheel is by chain gear, and chain can not fold, therefore, must step on big chain front flank at pin amounting to switch designs, and the position of big sprocket must be in the position after the centre of car load is slightly leaned on, and can not be contained on back 1/3rd the position of bicycle, otherwise can cause rider's position unreasonable, so the length of bicycle is certain to greater than 1/3rd of car load, and seem compact inadequately.

Summary of the invention

The purpose of the invention is to overcome the deficiencies in the prior art, and a kind of brand new portable folding bicycle is provided, and the general folding bicycle of the volume ratio behind this bicycle folding is little, is more convenient for carrying.

The purpose of this utility model is to realize by following technical scheme: the utility model is a kind of portable folding bicycle, include the built-in variable speed case that replaces pin to step on big sprocket gear, change speed gear box has the switch of amounting to back chain stay connecting place, change speed gear box places in the vehicle frame, arranged transmission gear is housed in the change speed gear box, first steps on transmission gear for pin, be followed successively by transmission gear thereafter, change gear, foot-operated transmission shaft is stepped on transmission gear by hole on the vehicle frame and pin and is linked to each other, final drive gear and preceding sprocket wheel are arranged on the back chain stay front end, connect by gear pin between final drive gear and the preceding sprocket wheel, back chain stay and change speed gear box connecting place amount to switch opens the time, change gear separates with the back driving cog, when amounting to the switch joint, change gear combines with the back driving cog, before sprocket wheel with afterwards be connected by chain between the sprocket wheel, (seeing accompanying drawing 6), sit bag bearing support and vehicle frame connecting place, front fork jag place and vehicle frame all have the switch of amounting to for preceding half section, sit the degree of tightness switch that adjustable seat bag height is arranged on the bag bearing support, also there are the degree of tightness switch of adjustable bicycle handlebar height, (seeing accompanying drawing 1) in the front fork upper end.

Beneficial effect of the present invention is to have realized three sections of bicycle average marks, the pin that has solved original Folding Bicycle is stepped on big sprocket gear and trailing wheel by technical bottleneck that chain gear brought, the utility model volume after folding is littler than general folding bicycle, be more convenient for carrying, the length of general Folding Bicycle poststack is about 72cm, and the length after originally neoteric folding bicycle folds only is (is example with 14 cun bicycles) about 45cm.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2-Fig. 5 is the folding process scheme drawing;

Fig. 6 is the gearbox designs scheme drawing.

Among the figure 1, gearbox body; 2, amount to switch; 3, back chain stay; 4, foot-operated transmission shaft and pin are stepped on starter receiver: 5, gear pin and transmission gear; 6, gear pin and change gear; 7, gear pin and final drive gear; 8, preceding sprocket wheel; 9, chain; 10, back sprocket wheel; 11, degree of tightness switch; 12, change speed gear box; 13, vehicle frame; 14, handlebar; 15, sit bag; 16 is foot-operated.

The specific embodiment

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

One, the utility model manufacturing process is as follows:

1. adorn the switch that can amount to 2 at front fork jag place, the whole length in insertion position of handlebar can be inserted the front fork first half, and adorns the degree of tightness switch 11 of an adjustable height in the front fork upper end.(seeing that accompanying drawing 1 shows)

2. do cycle frame 13 with rectangle tubing, one end links to each other with front fork, near front fork, adorn one and amount to switch 2, vehicle frame 13 other ends are also adorned one and are amounted to switch 2, half of switch 2 links to each other with back chain stay 3, on back chain stay 3 front ends final drive gear 7 and preceding sprocket wheel 8 are arranged, connect by gear pin between final drive gear 7 and the preceding sprocket wheel 8, (seeing accompanying drawing 6), second half and change speed gear box 12 (are equipped with arranged transmission gear in the change speed gear box, first steps on transmission gear 4 for pin, pin is a transmission gear 5 after stepping on transmission gear, change gear 6) links to each other, (seeing accompanying drawing 6) inserts change speed gear box 12 in the vehicle frame 13, with screw vehicle frame 13 and change speed gear box 12 tightened, be positioned at change speed gear box 12 first gear center positions (being that pin is stepped on transmission gear 4) at vehicle frame 13 and bore a hole, load onto foot-operated arm transmission shaft and bearing 4, refill foot-operated arm, between preceding sprocket wheel 8 and back sprocket wheel 10, load onto chain 9.(seeing accompanying drawing 1)

3. with the back vehicle frame 13 that joins of chain stay 3 above load onto the seat bag support that can amount to and adjust height, promptly sitting the degree of tightness switch 11 of loading onto adjustable seat bag height on the bag bearing support and amounting to 2, one folding bicycles of switch and just finished.(seeing accompanying drawing 1)

Two, the order of this bicycle folding is:

1. handlebar is loosened position under transferring to, the switch 2 of amounting at front fork jag place is decontroled, front-wheel is upwards turned up.(seeing accompanying drawing 2)

2. the vehicle frame rear end is opened with the switch 2 of amounting to that back chain stay 3 links to each other, turn up trailing wheel (annotate: foot-operated 16 should move on to appropriate position).(seeing accompanying drawing 3)

3. unclamp the vehicle frame front end and amount to switch 2, overlapping good front-wheel and trailing wheel.(seeing accompanying drawing 4)

4. unclamp to sit and amount to switch 2 and degree of tightness switch 11 on bag 15 bearing supports, pack up and be put into two wheel position intermediate, promptly finish sitting bag 15.(seeing accompanying drawing 5)

Claims

1, a kind of portable folding bicycle, it is characterized in that including the built-in variable speed case that replaces pin to step on big sprocket gear, change speed gear box has the switch of amounting to back chain stay connecting place, change speed gear box places in the vehicle frame, arranged transmission gear is housed in the change speed gear box, first steps on transmission gear for pin, be followed successively by transmission gear thereafter, change gear, foot-operated transmission shaft is stepped on transmission gear by hole on the vehicle frame and pin and is linked to each other, final drive gear and preceding sprocket wheel are arranged on the back chain stay front end, between final drive gear and the preceding sprocket wheel gear pin is housed, back chain stay and change speed gear box connecting place amount to switch opens the time, change gear separates with the back driving cog, and when amounting to the switch joint, change gear combines with the back driving cog, between preceding sprocket wheel and the back sprocket wheel chain is housed, sit bag bearing support and vehicle frame connecting place, front fork jag place and vehicle frame all have the switch of amounting to for preceding half section, sit the degree of tightness switch that adjustable seat bag height is arranged on the bag bearing support, and also there is the degree of tightness switch of adjustable bicycle handlebar height the front fork upper end.