CN201040559Y

CN201040559Y - Bicycle with built-in gear box

Info

Publication number: CN201040559Y
Application number: CNU2007201530833U
Authority: CN
Inventors: 黄京平
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-13
Filing date: 2007-06-13
Publication date: 2008-03-26
Anticipated expiration: 2017-06-13

Abstract

The utility model discloses a bicycle with an inner-placed gearbox, the bicycle frame is made by tubular metal, the gearbox equipped with drive gears is arranged in the frame, the inner gearbox is provided with a foot drive gear, a drive gear, a variable speed drive gear, a rear drive gear, a front sprocket, a gear pin, a shaft, etc. The post end of the gearbox is connected with the rear bottom fork for installing the rear wheel, the front sprocket connected with the post drive gear of the gearbox is connected with the post sprocket by chain, the treading arm drive shaft is connected with the foot drive gear of the gearbox through the hole of the frame. The utility model replaces the foot treading large chain gear by the inner-placed gearbox, which greatly shortens the chain length of the bicycle and lengthens the distance between the chain and the treading arm drive shaft, so that the trousers of rider will not touch the chain with oil pollution, and the appearance of the bicycle is more terse and delight.

Description

A kind of bicycle with built-in variable speed case

Technical field

The utility model relates to a kind of bicycle, more specifically to a kind of have by the built-in variable speed case replace pin to step on the bicycle of big sprocket gear.

Background technology

Its type of drive of bicycle that present people use always all is to step on big sprocket gear by pin to give trailing wheel transmission of power by chain, because pin is stepped on big sprocket gear and track rear from far away, therefore under the loose situation of chain, the chain phenomenon can appear taking off, in addition, because big sprocket gear area occupied is bigger, rider's trouser legs can be run into the chain that is stained with greasy dirt and the trousers of making dirty once in a while.

Summary of the invention

The purpose of this utility model is in order to overcome the deficiencies in the prior art, to provide a kind of and replace pin to step on the bicycle of big sprocket gear by the built-in variable speed case.

The purpose of this utility model realizes by the following technical solutions: cycle frame is made of tubular metal (comprising square tube or oval tube etc.), the change speed gear box that transmission gear is housed places in the vehicle frame, there is pin to step on transmission gear, transmission gear, change gear, final drive gear, preceding sprocket wheel, gear pin, bearing etc. in the change speed gear box, the change speed gear box rear end is connected with the back chain stay that trailing wheel is installed, the preceding sprocket wheel that links to each other with the change speed gear box final drive gear is linked to each other by chain with the back sprocket wheel, and foot-operated arm transmission shaft is stepped on transmission gear by the hole on the vehicle frame with the change speed gear box pin and linked to each other.

The beneficial effects of the utility model are: adopt the built-in variable speed case to replace pin to step on big sprocket gear, shortened the chain of bicycle greatly, and drawn back the distance of chain and foot-operated arm transmission shaft, so rider's trouser legs just can not be run into the chain that is stained with greasy dirt and the trousers of making dirty, and the bicycle outward appearance is more terse and attractive in appearance.

Description of drawings

Fig. 1 is the gearbox designs scheme drawing;

Fig. 2 is the utility model structural representation.

Among the figure 1, gearbox body; 2, preceding sprocket wheel; 3, back chain stay; 4, chain; 5, back sprocket wheel; 6, foot-operated transmission shaft and pin are stepped on transmission gear; 7, gear pin and transmission gear; 8, gear pin and change gear; 9, gear pin and final drive gear; 10, change speed gear box; 11 vehicle frames.

The specific embodiment

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

Convert by existing bicycle, remove the pin of existing bicycle and step on big sprocket gear and vehicle frame, make the vehicle frame 11 of bicycle then of square tube, do the change speed gear box 10 of a built-in arranged transmission gear again, change speed gear box 10 places in the vehicle frame 11, pin is housed in the change speed gear box 10 successively steps on transmission gear 6, transmission gear 7, change gear 8, final drive gear 9, preceding sprocket wheel 2, the back chain stay 3 of change speed gear box rear end connection trailing wheel, with screw vehicle frame 11 and change speed gear box 10 are tightened, be positioned at the change speed gear box pin at vehicle frame 11 and step on transmission gear 6 centers, be drilled with a hole, load onto foot-operated arm transmission shaft and bearing, refill foot-operated arm, between preceding sprocket wheel 2 and back sprocket wheel 5, load onto driving chain 4, so just made the utility model.

Claims

1. bicycle with built-in variable speed case, it is characterized in that including the change speed gear box of transmission gear, cycle frame is made of tubular metal, change speed gear box places in the vehicle frame, there is pin to step on transmission gear, transmission gear, change gear, final drive gear, preceding sprocket wheel, gear pin, bearing in the change speed gear box, the change speed gear box rear end is connected with the back chain stay that trailing wheel is installed, the preceding sprocket wheel that links to each other with the change speed gear box final drive gear is linked to each other by chain with the back sprocket wheel, and foot-operated arm transmission shaft is stepped on transmission gear by the hole on the vehicle frame with the change speed gear box pin and linked to each other.