CN2186212Y

CN2186212Y - Driving structure of bicycle

Info

Publication number: CN2186212Y
Application number: CN 94203050
Authority: CN
Inventors: 李思维
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-27
Filing date: 1994-01-27
Publication date: 1994-12-28
Anticipated expiration: 2004-01-27

Abstract

The utility model relates to a whole-function driving mechanism for a bicycle. With fluctuating driving torque, a common central shaft chain wheel bicycle is laborious, but the utility model overcomes the disadvantage. The whole-function driving mechanism for a bicycle comprises a frame which is composed of sliding bars (4) and (5), foot boards (8) and (9), and ratchet hooks (12) and (13), a chain 1 passes through two chain wheels (14) and (15) in the frame and penetrates through the centers of the ratchet hooks (12) and (13), and then the chain 1 leads to a back flywheel (2).

Description

Driving structure of bicycle

The utility model relates to a kind of bicycle driving mechanism.

Existing general general bicycle because following shortcoming is arranged: promptly when foot-operated strength is vertical with big connecting lever, the drive torque maximum of bicycle chainwheel, when foot-operated strength when the connecting lever length direction is consistent greatly, then drive torque is zero.The strength that this driver train is exported fluctuates.Theoretical derivation shows, thisly drive the mean force that mechanism exports and only equal 70% of foot-operated power, and remaining 30% done idle work.Existing similar variable speed bicycle, when low-grade location, though laborsaving, do not economize merit at all, there is 30% legpower to do idle work too.

The purpose of this utility model is: a kind of bicycle driving mechanism is provided, and it is not only laborsaving, province's merit, and can make bicycle that better grade climbing performance is arranged.

The purpose of this utility model is achieved in that on the architecture basics of general general bicycle or variable speed bicycle the cancellation axis turns greatly and the axis sprocket wheel.Load onto a kind of mechanism that makes foot-operated power linear drives chain, this mechanism has the vertical frame that two or more chute is formed, and has slide block and stretcher to link on chute, and indirect again and sour jujube hook links.Two sprocket wheels are arranged up and down in the framework, and driving chain is through these two sprocket wheels, hooks together with the sour jujube hook on up and down straight line between two sprocket wheels.Stressed when descending when stretcher, drive sour jujube by slide block and be hooked in operation downwards together on the chute, driving chain moves under the drive of sour jujube hook, and power is passed to rear flywheel.

For two motion of foot are linked to each other, the utility model adopts intermediary's chain by slide block two stretchers to be linked up, and intermediary's chain is supported by two intermediary's sprocket wheels.

, and when up, reduce friction a special spring that on the sour jujube hook, is equipped with for sour jujube hook and driving chain well hook together.

The utility model is because foot-operated power linear drives chain, the moment that drives can not change because the mechanical location of stretcher is different, if do not consider mechanical friction, can think that so the efficient of this driver train is 100%, with ordinary bicycle ratio, laborsaving 30%.And because of its drive torque can keep maximum, so adopt the bicycle grade climbing performance of this driver train good.

Fig. 1 is a scheme drawing of the present utility model, and Fig. 2 is the front view of takeoff output part, and Fig. 3 is a front view, and Fig. 4 is the The midsagittal plane birds-eye view, and Fig. 5 is the enlarged drawing of sour jujube shackles bar, and Fig. 4 is the utility model takeoff output part residing site plan on bicycle.

Below in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 the utility model and operational process thereof are described.

This bicycle driving mechanism comprises running part and takeoff output part.Running part comprises that chain (1) leads to the takeoff output part via the flywheel (2) on the rear axle (2).Takeoff output partly comprises: by the framework that sliding thick stick (4), (5) are formed, have a slide block (6) and the stretcher (8) in the outside to link on chute (4), link with sour jujube hook arm (10) simultaneously again, an end of sour jujube hook arm (10) and sour jujube hook (12) link.Also have slide block (7) and stretcher (9) to link on (5) on the chute, link with sour jujube hook arm (11) again simultaneously, sour jujube hook arm (11) one ends are sour jujube hook (13).Sprocket wheel (14) is held on top in framework, one chain cable fairlead (15) is arranged in the bottom, driving chain (1) is from these two chain processes, linearly therebetween, the front contacts with sour jujube hook (13), the back contacts with sour jujube hook (12), has a spring (19) to be stuck between sour jujube hook (12) and the sour jujube hook (10) on the sour jujube hook axle (20).Another sour jujube hook (13) also has same spline structure.Two intermediary's sprocket wheels (17), (18) are arranged at the top of framework, and intermediary's chain (16) is coupled together slide block (6), (7) by process above it.

This bicycle driving mechanism operational process is such: when stretcher (8) when being subjected to pedal power, move downwards with its slide block (6), sour jujube hook arm (10) and sour jujube hook (12) that is associated in one, sour jujube hook (12) is ejected with driving chain (1) hook by a silk spring (19) and to drive chain descending.Slide block (6) process intermediary's chain (16) is walked around intermediary's sprocket wheel (17) simultaneously, (18) drive sliding sleeve (7), stretcher (9), sour jujube hook arm (11) and sour jujube hook (13) the upwards operation together that opposite side combines as a whole, and sour jujube hook (13) is pushed out under the effect of driving chain (1) chain rivet and upwards slip.Otherwise when stretcher (9) was descending, the stretcher of opposite side (8) was then up, and sour jujube hook this moment (13) and messenger chain (1) hook, sour jujube hook (12) are pushed out upwards and slide.So repeatedly power is passed to chain 1 and drive rear flywheel (2) and rotate.

Because takeoff output of the present utility model partly is vertical frame, for guaranteeing stretcher enough traffic coveraves are arranged, so the bicycle of this driver train of adapted, vehicle frame middle part should be done overhead very lowly.Shown in figure (4), the takeoff output of driver train part (21) is placed between (22) and (23) of vehicle frame position.

Claims

1, a kind of bicycle driving mechanism, its running part has driving chain, and rear axle and flywheel is characterized in that its takeoff output partly has framework.Framework has chute, and slide block is arranged on the chute, with slide block links stretcher and sour jujube hook arm is arranged, and there is the sour jujube hook on the top of sour jujube hook arm.Sprocket wheel is held on top at framework, and bottom one chain cable fairlead, conveyor chain be through these two sprocket wheels, and between these two sprocket wheels with sour jujube hook hook.

2, driver train according to claim 1 is characterized in that it has two chutes.

3,, it is characterized in that a slide block is arranged on its every chute according to claim 1,2 described driver trains.

4,, it is characterized in that it has the sour jujube hook arm of two band sour jujube hooks according to claim 1,2 described driver trains.

5, driver train according to claim 3 is characterized in that respectively having and being with on its each root slide block the sour jujube hook arm of sour jujube hook.

6, driver train according to claim 1 is characterized in that its frame roof has two intermediary's sprocket wheels.

7, driver train according to claim 5 is characterized in that its frame roof has two intermediary's sprocket wheels.

8,, it is characterized in that it has intermediary's chain to link through two intermediary's sprocket wheels and two slide blocks according to claim 1,6 described driver trains.

9, driver train according to claim 7 is characterized in that having intermediary's chain to link through two intermediary's sprocket wheels and two slide blocks.