CN206125328U - Be fit for multistage sprocket of crank that a left side outer speed -changing bicycle of drive used - Google Patents

Abstract

The utility model provides a be fit for multistage sprocket of crank that a left side outer speed -changing bicycle of drive used. Multistage (containing 2 grades) big sprocket more than its characterized in that, second grade combines in the articulate right side with the little sequencing in the big right side in a left side. Pedal thread of mounting hole on the multistage sprocket crank of crank is the levogyration, and the pedal thread of mounting hole on the supporting single handle that uses is as dextrorotation with it.

Description

It is adapted to the crank multi-chain gear wheel that the outer multi-speed bicycle of left driving is used

Technical field

The utility model is related to a kind of crank multi-chain gear wheel of bicycle, is provided in particular in a kind of outer speed change of suitable left driving The crank multi-chain gear wheel that bicycle is used.

Background technology

Bicycle is individual's machinery articles for use that are a kind of common and extremely popularizing, and in the world its recoverable amount and user are equal It is hundreds of millions of.Also never it has been interrupted in more than 200 years to the improvement of bicycle itself since its birth.With sending out for society Exhibition, bicycle acts on constantly raising as sports apparatus, body-building apparatus and converter tools, and this is also bicycle performance Raising carries out ultimate attainmentization transformation and provides power.1940, the speed change system that Kan Paniuluo (Tullio Campagnolo) is released Indicate the beginning in sports bicycle shift epoch.Compared with single speed bicycle, there is the multi-speed bicycle of manual derailleur, for The effect for improving riding speed is very notable.This is one can clearly be experienced " sensing type " improvement by cyclist.It is this kind of It is rare to have improved since nearly half a century.Also some improvement, for example, manufacture bearing with high-duty cast ceramic balls, " plate type wheel ", " break bar ", vehicle frame adopts streamlined tubing, with carbon fiber or titanium alloy manufacture vehicle frame etc., this kind of improvement, they Riding resistance to reducing bicycle, improve riding speed effect can be described as it is very little, mostly can only be by fine survey Examination is proved that such improvement can be referred to as " test improvement ".Although such improvement effect is not it is obvious that but bicycle neck The science research input that domain is paid for this is huge, and economic cost is high.If bicycle is only used as the personal daily vehicles to use, These " test improvement " can give it up.But, as strongly pursue improve riding speed cyclist and Cycling enthusiasts, still go after like a flock of ducks to this kind of improvement.For this colony, if bicycle improve can by oneself Riding speed improves 0.1s/km, is all extremely big Gospel.Because in high-level bicycle rider tournament, the difference of 0.1 second can be with It is champion and the gap of the 10th！Beijing Olympic Games man's highway (245.4 kilometers) bicycle finals the 1st to 6 in such as 08 year Achievement be 6 hours 23 points 49 seconds, its ranking can only rely on the slightest difference in the high-speed photography picture of terminal line end determining.

In prior art, the driving means in bicycle be all be substantially disposed in right side, only BMX bicycles (single speed) and The bicycle ridden jointly for double and many people has left driving device to occur.There is artificial sinistration foot people to design left drive single speed voluntarily Car, but have no that such commodity emerge.Driving is arranged at left side by part street formula BMX bicycle, while in the right outside peace of bicycle Dress steps on cylinder, gets used to being used with the preceding bicyclist of right leg for doing acrobatic elements, its objective is to avoid big sprocket wheel from doing specific It is damaged during stunt.While left driving device is set for the bicycle that double and many people ride jointly, right drive is also provided with Device, it is therefore an objective to coordinate multiple driving means.If speed change gear, its speed change gear is still on right side.Driving in bicycle Device is arranged on right side, and from 1888, John .k. Si Tali in Coventry, United Kingdom city produced first modern times certainly to this situation Drive a vehicle and there is, the time is more than a century.Its initial design considerations has had no way of investigating, but, people may Think, driving means should be arranged on rides on the vehicle frame of people's leg foot advantage side.Therefore, have also appeared for sinistration foot crowd, if Count out single speed bicycle of the driving means in left side.From making full use of sharp foot advantage to improve the consideration of riding speed angle, this Viewpoint is a kind of misunderstanding, the driving means of bicycle be arranged on people's leg foot advantage side vehicle frame for give full play to advantage side ability with It is unfavorable to improve speed.

It is also to change common people for the essence technology prejudice that bicycle structure is designed for the problems referred to above, there is provided It is a kind of more reasonable in strength transmission, the suitable right-handedness foot for accounting for the most right-handedness foot person's physiological dominance of population can be given full play to The outer multi-speed bicycle of left driving that crowd uses, multistage (the containing two grades) big sprocket wheel that will be arranged on axis is arranged on vehicle frame Left side, left crank is solidified as a whole with the big sprocket wheel；Correspondingly, on rear axle step by-step variable gear (multi-chain gear wheel) is arranged In the back left interior of vehicle frame；Accordingly, the derailleur of speed change gear is arranged on the left side of vehicle frame on the axis and rear axle.

The purpose of this utility model is that, there is provided a kind of crank multiple strand chain suitable for the outer multi-speed bicycle of left driving Wheel.

Crank multi-chain gear wheel is prior art, and style is numerous, and general structure is essentially identical.Typical structure includes crank and two Multistage big sprocket wheel more than level.In order to adapt to the outer multi-speed bicycle of left drive, crank multi-chain gear wheel also has respective change.

Utility model content

It is a kind of to be adapted to the crank multi-chain gear wheel that the outer multi-speed bicycle of left driving is used, it is characterised in that more than two grades many Level (containing 2 grades) big sprocket wheel is the right side for being incorporated into crank with sequence left large and right small.Foot-operated peace on crank multi-chain gear wheel crank Dress hole screw thread is left-handed, and the foot-operated installing hole screw thread on the matched single crank for using is dextrorotation.

What the utility model was specific to is that cyclist and cycling enthusiasts are such a in cycling crowd It is keen to carry out bicycle ultimate attainmentization transformation, pursues the colony for improving riding speed, is that foundation accounts for the most right-handedness of population The physilogical characteristics of sufficient crowd are input into bicycle power, the improvement that export structure is arranged.

The present invention is based on following two discoveries：

One：Many cycling researchers have been found that when test cyclist steps on and pedals power：Left side legpower is more than right side.For How about this is but without accurately explanation.Such as：Luo Jiong's " development of cycle test car and steps on opening for juggling with the feet art diagnostic analysis systems soft ware Send out " (Beijing Sport University 2005,05,18)；Wu Cuie, Yuan Peng, military Gui Xin etc. " difference is stepped on and pedals cyclist under frequency Step on and pedal power research " (sports and science 2007,1, (28))；" lower limb muscular work and the foot when different drive ratios are ridden of Zhang Yihang The research of bottom pressure feature " (Beijing Sport University 2008,05,26)；Cao Chengzhu " track rider special project is stepped on and pedals power The analysis and research of amount " (Chinese New Products .2009,14).The test result announced in its text is all that left side legpower is more than Right side, but clear and definite answer is not all given the reason for producing this phenomenon.

Inventors herein have recognized that:Step on resistance more than the right side under the current structures shape of bicycle bicycle left side now Side, reason has two (by taking existing right driving bicycles as an example)：

1) present right driving bicycle driven, i.e. big sprocket wheel may be contained within bicycle right side with minor sprocket, and are connected by chain Connect.Big sprocket wheel, bilateral crank and bilateral are foot-operated to constitute bicycle quick shaft type power loader.Generally big sprocket wheel is with right crank It is combined together, the lateral separation very little of both the stress points when being stepped on the stress point of right crank end and big sprocket wheel, We are defined as the driving structure on right side：One group of simple lever claims direct lever；The crank in left side is by axis and big chain Wheel is indirectly joined together, and the lateral separation of both the stress points when being stepped in the stress point of left crank end and big sprocket wheel is The manyfold on right side, and axis is installed in bicycle center tap and supported by two groups of bearings.In order to keep the flexible of rotation Property, it is necessary to preserve certain gap in plane of rotation.We are defined as the driving structure (containing axis, big sprocket wheel) in left side：One group Double lever or indirect lever.The legpower that right crank is subject to, when being delivered in big sprocket wheel, its loss very little very little can be ignored Disregard.And the legpower that left crank is subject to is when being delivered in big sprocket wheel, its loss ratio right side is much bigger.

2), necessarily by the distortion power of axis in riding, this distortion power is at 3 for the center tap of bicycle：A) big chain Wheel, behind the substantially right side of distortion power a directions；B) left crank, distortion power b directions are substantially left front；C) right crank, distortion power c directions Substantially before the right side.Distortion power a ride step on pedal in all exist all the time；Distortion power b is produced when left crank is descending；Distortion power c exists Produce when right crank is descending.Distortion power a and distortion power b is mutual enhanced relation, and more legpowers can be lost；Distortion power a with Distortion power c is the relation cancelled out each other, and can reduce the loss of legpower.

In sum, its result directly translates into and resistance is stepped under bicycle left side more than right side, is transported according to multidigit bicycle The test result that dynamic researcher is done calculates, steps on resistance under bicycle left side and be more than right side 3% or so.So, it is straight in pedal position When connecing legpower under detection cyclist, even if the left and right sides of cyclist is stepped on, speed is completely the same, and left side legpower must also be greater than right side.

Two：It has long been known that the upper limbs of people has single side superiority, most people is all that (upper limbs advantage side is dextro manuality Right side)；Equally, the lower limb of people are also have single side superiority, and the advantage side of most people lower limb is right side, also known as right-handedness foot. But this people for knowing of point may be few, 1985 Plato (Plato) etc. to some white men of Maryland, USA for containing handedness, The asymmetric behavioural characteristics of the mankind such as sharp foot carried out investigation；Chinese scholar starts to have carried out this some to grind in the nineties in 20th century Study carefully.Such as：Ai Qinglong, king's sweet-smelling grass, " measure of 150 profit foots and handedness " ([J] the Academic Journal of Kunming Medical College 1991,12 of Pu Daoxue (1))；" Oroqen, Ewenki, Daur nationality's lateral dominance functional character research " ([J] of Lu Shunhua, Zheng Lianbin, Li Yonglan etc. Hereditary .2000.22 (5)).But do not find that in the world profit foot situation of the someone to cyclist in stepping bicycle is stepped on is carried out so far Cross the report of research.But, there is relevant information disclosed in prior art：Zheng Xiaohong, prolongs " current China's Track Cycling item of beacon The horizontal women's splendid dress of height of eye steps on the Primary Study of the state of pedaling " (Beijing Teachers College of Physical Education's journal 1997,6 (9))；Li Chen, Liu " China high level woman 500 meters of place timing project cyclist steps on and pedals state research " of English (learn by Shandong Physical Education Institute Report 2007,4 (23))；" research of lower limb muscular work and plantar pressure feature when different drive ratios are ridden " (Beijing of Zhang Yihang Sport university 2008,05,26)；

The test result announced in each piece article all show right good the stepping on for left difference of most of cyclists and pedal shape Condition.

Profit foot situation of the applicant to cyclist in stepping bicycle is stepped on has carried out the research of nearly 2 years.By testing into one Step confirms that this right good left poor situation not only exists when right-handedness foot people rides right driving bicycle driven, and foot people rides left drive voluntarily in right-handedness Still exist during car.Tracing it to its cause is：It is very unique, category that what cyclist was made on bicycle step on pedals the feature of having an effect of action In the complicated random movement of lower limb, advantage side lower limb can preferably complete it, be the embodiment of limbs single side superiority, even if being run into Resistance it is slightly larger when it is still such.Applicants have discovered that：When right-handedness foot people scrunches bicycle (either left drive or right drive), right foot Under when stepping on the motion of crank half cycle round and smooth degree, (round and smooth degree is to weigh to be better than the round and smooth degree of crank half cycle motion when stepping under left foot Step on one of standard for pedaling level of movement height).Also show as simultaneously, the running speed outline of right half cycle is slightly faster than the fortune of left half cycle Rotary speed.

In sum, the right drive structure that now cyclists only, to accounting for population most right-handedness foot cyclist for, be The structure of individual mistake.It chooses a light load of comparison like allowing a people for being good at bearing a load on one's shoulder (right lower extremity)；And allow another The individual people's (left lower extremity) for being bad to bear a load on one's shoulder chooses a heavier load.And require them under conditions of synchronously moving ahead, Hurry up as far as possible.Necessarily the kind person of carrying a load is lighter for its result, but in order to synchronous moving ahead can not play his all one's effort, and be not good at The person of carrying a load then has to run around all the time wears him out for synchronous moving ahead to full capacity.The pace of the two can only be limited to be not good at the poor of the person of carrying a load Ability.It is will not to tolerate above-mentioned in the sports tournament that this kind of Jing of bicycle rider tournament often will challenge sportsman's physical endurance What situation was present, unless it is undiscovered！

The left drive multi-speed bicycle that suitable right-handedness foot crowd uses will be stepped on and pedal the larger crank of resistance and be arranged at right side, make the right side The cyclist of sharp foot can more fully play the ability of its right lower extremity advantage side, and drive its left lower extremity ability more effectively Play.Dextropedal cyclist ride left driving bicycle driven when, under the constant situation of left foot power output, its right sufficient power is defeated Output should be higher than left foot by 3% or so.The increase of this integral power output quantity, can be with equivalent to by bicycle loss of weight 25-50% The riding speed of bicyclist is improved into 1% or so, high-caliber cycling people can experience.This be one between Improvement between " sensing type improvement " and " test improvement ".For bicycle its benefit of racing is self-evident.And this reality It is one of vitals of the outer multi-speed bicycle of left drive with the outer multi-speed bicycle crank and chain-wheel of the left drive of new offer.

It is that those skilled in the art can be with complete although transforming existing multi-speed bicycle as left drive from right drive Into design objective, but never someone does.Bicycle is a typical assembling commodity, even car load factory is nor all What parts can be produced.Each parts be by special manufacturer production out.Cooperation without each producer, produces left drive and becomes Fast bicycle cost can be very high.Nobody has found the right drive structure that now cyclists only, to accounting for the most right-handedness foot of population It is a structure for mistake for cyclist；Nobody recognizes and left drives that multi-speed bicycle is this installs bicycle driving device Position is changed into left from the right side, is extremely beneficial one for those strongly pursue the right-handedness foot crowd for improving oneself riding speed Bicycle structure element relationship changes (invention of key element change).This is that nobody goes design over more than 70 years, produces left drive speed change The reason for bicycle.So more no one individually goes design, the outer multi-speed bicycle crank and chain-wheel of left drive is produced.

The utility model is described in further details below by drawings and Examples.

Description of the drawings

Fig. 1 is adapted to the structural representation of the outer multi-speed bicycle of left drive that right-handedness foot crowd uses.

The structural representation of a crank multi-chain gear wheel that Fig. 2 is provided for the utility model.

Fig. 2 a are the right side structural representation of Fig. 2, wherein showing that each big chainlet piece is left large and right small on crank multi-chain gear wheel Ordering.

The structural representation of a and matching used single crank of crank multi-chain gear wheel that Fig. 3 is provided for the utility model.

Fig. 3 a are the right side structural representation of Fig. 3.

Specific embodiment

Selected embodiment of the present utility model is illustrated now with reference to accompanying drawing.

Bicycle crank sprocket wheel is it is well known that the utility model art in the utility model art Technical staff just can be with the correct understanding present invention by the accompanying drawing of the utility model specification.Therefore, will only combine herein attached Figure is described briefly.Use in the utility model explanation " it is front, after, it is left, it is right, on, under " isotropy word each mean installation this Those directions of the bicycle of utility model.

The outer multi-speed bicycle of left drive that suitable right-handedness foot crowd uses on vehicle frame as shown in figure 1, including a vehicle frame 1, arrange Variable-speed controller 2, arranges axis 3 on the vehicle frame, the crank multi-chain gear wheel 4 of the utility model offer, the song are set on axis 3 Handle multi-chain gear wheel 4 is arranged at the middle and lower part left side of vehicle frame 1, and in the right-hand member of axis 3 the matched single crank 5 for using is arranged, Pedal 6 is respectively provided with crank multi-chain gear wheel 4 and the matched single crank 5 for using.Rear axle 7 is set on the rear portion of vehicle frame 1, Support rear wheel 12.Multistage flying wheel 8 is set on rear axle 7, and multistage flying wheel 8 is arranged in the left rear side of vehicle frame 1 and crank multiple strand chain Correspondence before and after multistage big sprocket wheel on wheel 4.Chain 9 is arranged in multistage big sprocket wheel and flywheel 8 on crank and chain-wheel 4.In vehicle frame 1 Left side under rear end be provided with rear chiain-moving device 10, front chain mover 11 is installed, its main body position on the left of the middle lower portion on vehicle frame 1 Put above the multistage big sprocket wheel side on crank multi-chain gear wheel 4.

Fig. 2 show the structural representation of a left drive multi-speed bicycle crank multi-chain gear wheel of the utility model offer Figure.Crank multi-chain gear wheel 4 includes crank 401, and multistage big sprocket wheel 402, the outer end of crank arranges foot-operated installing hole 403.Crank 401 Combine for left and right with multistage big sprocket wheel 402, the position that crank 401 is combined with multi-chain gear wheel 402 is located at the inner right side of crank, many 3 big sprocket wheel pieces of level sprocket wheel 402 are the right sides (referring to Fig. 2 a) for being incorporated into crank with sequence left large and right small, on the crank The screw thread of foot-operated installing hole 403 for left-handed.

The structure of the matching used single crank 5 of a and crank multi-chain gear wheel that Fig. 3 and Fig. 3 a are provided for the utility model Schematic diagram.The screw thread of foot-operated installing hole 501 on the crank is dextrorotation.

It is foot-operated with crank mounting means is in addition to Screw assembly, or spline grafting is combined holding screw and fixed Assembling mode.

Although only have selected selected embodiment to be illustrated the utility model, by reading in the disclosure Hold, the utility model those skilled in the art can very clearly, this practicality defined in without departing substantially from appended claims In the case of new scope, here can make various variations and remodeling.To the above description of the utility model embodiment only For illustrating, limit not for the utility model to being limited by appended claims and its equivalents.

Claims (2)

1. it is a kind of to be adapted to the crank multi-chain gear wheel that the outer multi-speed bicycle of left driving is used, it is characterised in that more than two grades multistage Big sprocket wheel is the right side for being incorporated into crank with sequence left large and right small.

It is 2. according to claim 1 to be adapted to the crank multi-chain gear wheel that the outer multi-speed bicycle of left driving is used, it is characterised in that： Foot-operated installing hole screw thread on crank multi-chain gear wheel crank is left-handed, the foot-operated installing hole spiral shell on the matched single crank for using Line is dextrorotation.