CN1511755A - Multiplier speed chain wheel driving device for non motor vehicle - Google Patents
Multiplier speed chain wheel driving device for non motor vehicle Download PDFInfo
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- CN1511755A CN1511755A CNA021597367A CN02159736A CN1511755A CN 1511755 A CN1511755 A CN 1511755A CN A021597367 A CNA021597367 A CN A021597367A CN 02159736 A CN02159736 A CN 02159736A CN 1511755 A CN1511755 A CN 1511755A
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Abstract
The speed doubling chain wheel driving device fore non-motor vehicle includes one non-circular large chain wheel set on the driven middle shaft, and one speed doubling transmission mechanism including at least one input shaft and one output shaft connected to the driven middle shaft. The speed doubling transmission mechanism may be one gear mechanism with transmission ratio of 1 to 2. The speed doubling transmission mechanism and non-circular chain wheel are designed on the physiological features of pedal motion and can reduce the rider's physical consumption and raise the riding efficiency of non-motor vehicle.
Description
Technical field
The invention provides a kind of chain sprocket driving device of unpowered vehicle, especially a kind of unpowered vehicle double-speed chain wheel drive unit.
Background technology
Bicycle is that a kind of traditional manpower drives the vehicle.Nowadays, along with development of times, it is except as the vehicle, becomes people's indispensable apparatus in motion, leisure, contest, health care and rehabilitation more.Thereby, the dissimilar bicycle of sporting car, light roadster, folded bicycle, wheelbarrow, track cycle and body-building vehicle or the like has appearred.
As shown in Figure 1, crank and chain-wheel is the core component that in the bicycle cyclist's the power of scrunching is converted into propulsive effort, and now common crank and chain-wheel is actual to have constituted one pair of lever, and crank is a master arm, and sprocket wheel is a passive arm.In service at bicycle, the actual length of master arm changes at any time.The length of its available crank multiply by the position at crank place and scrunches the sine value of angle α between the force direction (sin α) to be represented.And the actual length of passive arm is a unmodified.
People are by bike the time, and the ability of having an effect of shank is to be directly proportional with the knee joint angle size.People are when scrunching bicycle, and it is very big running to the resistance difference of experiencing on the different angles at crank.For example, when the position of crank is 30 when spending with scrunching the force direction angle, master arm is 1/2 of a crank length.At this moment, the extreme higher position in running period is approached in the position of stretcher, and knee joint angle is inevitable less.The shank ability of having an effect is in the low scope.When the position of crank is 90 when spending with scrunching the angular separation, master arm and crank are isometric.And this moment, stretcher was in middle part in running period, and knee joint angle is tentatively opened, and the shank ability of having an effect is in the medium range.Because passive arm length is constant, the Resistance Value at this two place equates.The resistance difference that scrunches that the difference of ability is experienced the cyclist but master arm length and shank are had an effect should be about 1～2 times.People's this impression when going up a slope by bike is the strongest.This is that this crank and chain-wheel mechanism is in a significant deficiency that is used as on the bicycle of the general vehicle.
Various types of bicycles, because the difference of application target etc. also has very big difference to its designing requirement: as daily used for vehicle, requirement is light as much as possible under the speed of a motor vehicle commonly used; The requirement of racing car is to improve the efficient that cyclist's power of scrunching is converted into propulsive effort as possible; Body-building, public bus reserved for the disabled then require can occur the change in resistance of setting in the process of scrunching.
And to these, the designers of new bicycle must propose new technical scheme to the crank and chain-wheel structure.Now most popular is that one group of hinge wheel that varies in size is set, and still, so still can't regulate the cyclical variation of the resistance that the cyclist experienced when scrunching bicycle, and it fails to overcome the defective of traditional mechanism.
Also having a class scheme is that hinge wheel is designed to non-circular shape, and this type of design is too numerous to enumerate in the prior art, but really popular very rarely seen.To analyze this below.
The leading design philosophy of noncircular chain wheel is exactly the radius by continuous change hinge wheel, and passive arm is changed according to designing requirement, scrunches resistance and also produces corresponding variation thereby make, to reach different application targets.People have designed different noncircular chain wheel according to oneself design philosophy, but their design effect of out of reach often in fact.Tracing it to its cause is, in the crank and chain-wheel of conventional confguration was formed, the actual length of passive arm was the vertical distance that near the point of engagement (or) of chain and sprocket wheel arrive sprocket shaft.
When sprocket wheel is circle, sprocket wheel and chain are by the tooth good engagement, if promptly hinge wheel has 36 teeth, when sprocket rotation 10 is spent, inevitable have a follow-up adjacent tooth to enter and chain engages again, and first stress point on the sprocket wheel also shifts by tooth thereupon, and at this moment, in any case the actual length of the passive arm of hinge wheel all is a unmodified.
But situation just differs widely when the running of non-round hinge wheel.The radius of noncircular chain wheel changes according to the contemplated passive arm Changing Pattern of designer, but first stress point of sprocket wheel but often can more accurately not shift by tooth with the sprocket rotation angle by designer's setting synchronously, so the Changing Pattern of sprocket wheel passive arm just can not more accurately be reflected.Be depicted as a non-round hinge wheel as Fig. 2 a, 2b, its designer is that the Changing Pattern of wishing passive arm such as this sprocket radius is realized one by one by tooth with the shape that hinge wheel is designed to as shown in the figure.But from Fig. 2 b, can see, when sprocket wheel is in a turned position, chain and sprocket wheel mesh at a point place, when it clockwise rotates 20 when spending, sprocket wheel and chain mesh at b point place, when it clockwise rotates 60 when spending, sprocket wheel and chain mesh at c point place, as can be seen from the figure, the number of teeth that the number of teeth that a point is ordered to b is ordered to c greater than the b point shows thus significantly, there is an inverse relation in the angle that the number of teeth that meshed and sprocket wheel turn over, and for example shown in Fig. 2 a, when this sprocket wheel was in another turned position, chain and sprocket wheel meshed at d point place, when it clockwise rotates 20 when spending, sprocket wheel and chain be in e point place engagement, and when it clockwise rotates 60 when spending, sprocket wheel and chain mesh at f point place, as can be seen from the figure, the number of teeth that the d point is ordered to e is less than the number of teeth that the e point is ordered to f, shows significantly thus, and there is a proportional relation in the angle that the number of teeth that meshed and sprocket wheel turn over.Therefore, this as can be seen sprocket wheel has produced bigger motion distortion.So the design plan of noncircular chain wheel is out of reach designer's Expected Results often, therefore, this scheme also just can not be accepted and promote the use of by bicycle circle.
In order to solve the problem of above-mentioned motion distortion, often adopt this scheme in the prior art, promptly reduce the radius changing rate of noncircular chain wheel in the unit angle, 100GS type ellipse wheel as Japanese SHIMANO product, its radius of curvature changes just less, it is installed on the bicycle, has only careful people can find out that just it is non-round sprocket wheel.Certainly, the sprocket wheel that the radius of curvature rate of change is very little is like this realizing changing in the requirement also just limited such as laborsaving or other design arm of force.
In sum, rotate in the week at crank, the variation that scrunches resistance is still bigger, and the passive arm that make designed sprocket wheel to make to adapt with it changes, and the radius of curvature rate of change of sprocket wheel must be bigger.But there is not a kind of comparatively ideal technical scheme that the degree of distortion of the motion of the non-round hinge wheel that designs according to design philosophy is reduced as much as possible in the prior art.
Summary of the invention
The objective of the invention is to improve deficiency of the prior art, provide a kind of radius of curvature rate of change of designed non-round hinge wheel that can make in a bigger scope, still can not occur the problem of motion distortion substantially, thereby make noncircular chain wheel can really bring into play the unpowered vehicle actuating device of its designed special usefulness.
The object of the present invention is achieved like this:
Actuating device provided by the invention comprises a non-round hinge wheel, and it is located on the passive axis, also comprises a cover times speed driving mechanism, and it includes an input shaft and an output shaft at least, and this passive axis is connected with the output shaft of described times of speed driving mechanism; The transmitting ratio of described times of speed driving mechanism is 1: 2.
When using this actuating device to drive unpowered vehicle, the two ends of the input shaft of described times of speed driving mechanism are connected firmly existing crank, end at this crank sets firmly stretcher rotationally, make described times of speed driving mechanism obtain powered rotation by the foot-operated of bicyclist, then drive non-round hinge wheel by a times speed driving mechanism and rotate, drive car by the rotation of chain drive minor sprocket again and advance.
Because the present invention has improved the drive mechanism between hinge wheel and the crank, set up a times of speed driving mechanism betwixt, the bicyclist who scrunches stretcher makes described crank rotate 180 degree, hinge wheel just can rotate 360 degree, like this, originally in order to adapt to the physiology of exercise characteristics that human body rides and to overstep change in resistance rule or the like requirement in the journey down, be in the angular ranges of 180 degree of hinge wheel design-calculated by maximum curvature radius to the rangeability of minimum profile curvature radius just can 360 spend within arrangement.As Fig. 2 c, 2d, noncircular chain wheel shown in the 2e is exactly the scheme drawing of the noncircular chain wheel shape after the noncircular chain wheel characteristics of motion shown in Fig. 2 a is arranged in 360 degree, shown in Fig. 2 a is the shape of noncircular chain wheel in the time of will making the radius of curvature of sprocket wheel have desired a variation in the design of traditional sprocket rotation, and be used actuating device provided by the invention, owing to have a times of speed driving mechanism, then, in the time of can playing same passive arm Changing Pattern, the shape of noncircular chain wheel can be made into the shape shown in Fig. 2 c, its motion characteristics can schematically be seen Fig. 2 d, shown in the 2e, shown in Fig. 2 d, when the noncircular chain wheel after changing is in a turned position, chain and sprocket wheel mesh at d ' some place, when it clockwise rotates 40 degree (20 degree that turn among the corresponding diagram 2a), sprocket wheel and chain mesh at e ' some place, when it clockwise rotates 120 degree (60 degree that turn among the corresponding diagram 2a), sprocket wheel and chain mesh at f ' some place, as can be seen from the figure, d ' puts the number of teeth of e ' point and gap that e ' puts the number of teeth of f ' point is less than the situation shown in Fig. 2 a, for another example shown in Fig. 2 e, when the noncircular chain wheel after changing is in another turned position, chain and sprocket wheel mesh at a ' some place, when it clockwise rotates 40 degree (20 degree that turn among the corresponding diagram 2b), sprocket wheel and chain mesh at b ' some place, when it clockwise rotates 120 degree (60 degree that turn among the corresponding diagram 2a), sprocket wheel and chain mesh at c ' some place, as can be seen from the figure, a ' puts the number of teeth of b ' point and gap that b ' puts the number of teeth of c ' point is less than the situation shown in Fig. 2 b.Two noncircular chain wheel rotational characteristics among comparison diagram 2a and Fig. 2 d and Fig. 2 b and Fig. 2 e as can be seen, having the prerequisite of same variation effect and effect than the hinge wheel shown in Fig. 2 a under, the variation that the unit of the hinge wheel shown in Fig. 2 d turns over the radius of curvature in the angle reduces half, therefore, sprocket wheel among Fig. 2 d in use its motion distortion degree is to be significantly less than sprocket wheel shown in Fig. 2 a, makes its actual result of use can more approach designer's design idea.This is because added this duplication acceleration mechanism in chain drive, and the radius of curvature variation that turns in the angle in the hinge wheel unit that uses in device of the present invention has been reduced, and just can solve the problem of motion distortion in the prior art thus effectively.This should be can complete embodiment designer change the transmission device of requirement to the sprocket wheel radius of curvature in the present noncircular chain wheel transmission device.
Described times of speed driving mechanism can be chain wheel driving mechanism, also can be gear drive and other speed-changing mechanism.
As gear drive, described times of speed driving mechanism comprises a driving gear and a ring gear at least, the ratio of number of teeth of described driving gear and ring gear is 2: 1, described driving gear is fixedly arranged on the described input shaft, described ring gear is fixedly arranged on the described output shaft, and these two gears are meshing with each other.
Above-mentioned times speed driving mechanism structure is the simplest, but this mechanism makes the rotation direction of wheel and the direction of rotation of stretcher.
In order to make turning to of wheel consistent with the rotation direction of stretcher, can be in times speed driving mechanism establish tween drive shaft between input shaft and the output shaft, be provided with at least one gear thereon as Jie's gear, adjust turning to of wheel and stretcher with this and make it consistent.But the structure that increases Jie's gear like this can make the longitudinal construction of this times speed driving mechanism not compact, therefore, also can on this tween drive shaft, be provided with the gear that two numbers of teeth equate, its respectively with described input shaft on driving gear and the ring gear on the described output shaft be meshed, be adjusted to consistent with turning to of stretcher turning to of wheel with this.
Sometimes wheel turn to turning to of stretcher inconsistent, for some bicyclists, especially the user of some body-building vehicles is a kind of vehicles that can carry out specific exercises, in order to make car have comformability widely, can provide both can provide and turn to consistent motion, the car of the motion of switched in opposite can be provided again, and the present invention can provide a kind of described times of speed driving mechanism that can commutate.
In double-speed chain wheel drive unit provided by the invention, on described passive axis, can also set firmly one or more hinge wheels again.Can comprise one or more circle sprocket wheel and noncircular chain wheels in this hinge wheel.This device is had the unpowered vehicle of specific function except the different designs purpose according to the designer constitutes, can also to described round sprocket wheel, make car become common unpowered vehicle by adjusting chain.The noncircular chain wheel that also can comprise in addition, several shape differences, different sizes in the described hinge wheel.To different noncircular chain wheels, can make this unpowered vehicle realize the different design goal of designer by adjusting chain, have different specific functions.
Unpowered vehicle provided by the invention with the double-speed chain wheel drive unit by making scrunching the radius of curvature that physiology of exercise characteristics design-calculated in the motion of foot differs in size according to the bicyclist and can realizing exactly in the chain-driving process at car of non-round hinge wheel having increased by a cover times speed driving mechanism between non-round hinge wheel and the foot-operated crank, alleviate bicyclist's muscle power significantly, or improve the efficient of riding of unpowered vehicle to greatest extent, perhaps realize some special design goal of designer exactly, make unpowered vehicle have some special functions and actual motion and mechanics rule substantial deviation design-calculated problem of motion distortion do not take place.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of the unpowered vehicle actuating device of crank and stretcher and the combination of circular hinge wheel in the prior art;
Fig. 2 be in the prior art non-round hinge wheel at the structural representation of motion process middle sprocket and chain engages;
Fig. 2 a and 2b and 2c, 2d and 2e have same motion change rule but respectively with driving device bonded assembly noncircular chain wheel of the prior art with as the structural representation and the motion scheme drawing of the noncircular chain wheel in the double-speed chain wheel drive unit provided by the invention;
Fig. 3 is the drive mechanism scheme drawing of the double-speed chain wheel drive unit of a kind of duplication acceleration mechanism provided by the invention;
Fig. 4 is the drive mechanism scheme drawing of the double-speed chain wheel drive unit of another kind of duplication acceleration mechanism provided by the invention;
Fig. 5 is the drive mechanism scheme drawing of the double-speed chain wheel drive unit of another duplication acceleration mechanism provided by the invention;
Fig. 6 be chain-wheel mechanism provided by the invention constitute times speed driving mechanism the drive mechanism scheme drawing of double-speed chain wheel drive unit;
Fig. 7 is the drive mechanism scheme drawing with double-speed chain wheel drive unit of two non-round hinge wheels provided by the invention.
The specific embodiment
As shown in Figure 3, the non-round hinge wheel that double-speed chain wheel drive unit provided by the invention comprises is an eccentric sprocket wheel 1 at this, it is located on the passive axis 2, also comprise a cover times speed driving mechanism 3, it comprises two intermeshing driving gears 31 and driven gear 32 and an input shaft 33 and an output shaft 34, driving gear 31 is fixedly arranged on the input shaft 33, and driven gear 32 is fixedly arranged on the output shaft 34, and the ratio of number of teeth of driving gear and driven gear is 2: 1.At this, it is an axle that the output shaft 34 in times speed driving mechanism 3 connects firmly with passive axis 2
In use, two crank footrest mechanism 4,5 are installed in the two ends of input shaft 33 respectively.Scrunching stretcher by bicyclist's both feet rotates the input shaft 33 of double-speed chain wheel drive unit, driving gear 31 rotates thereupon, the driven gear 32 that drive is located on the output shaft 34 rotates, make output shaft 34, just passive axis rotates, rotate thereby drive eccentric sprocket wheel 1, the car that this actuating device is installed is advanced.
In the present embodiment, the travel direction of car is opposite with the positive dirction of riding, and car is advanced forward, and need kick backward the step pedal can.
For the travel direction that makes car is identical with foot-operated positive dirction, double-speed chain wheel drive unit provided by the invention can be the structure as Fig. 4.
As shown in Figure 4, the non-round hinge wheel 1a that another kind of double-speed chain wheel drive unit provided by the invention comprises, it is located on the passive axis 2a, also comprise a cover times speed driving mechanism 3a, it comprises an input shaft 33a, an output shaft 34a and a tween drive shaft 35a, the revolution ratio of input shaft and output shaft is 1: 2, sets the number of teeth of each gear of this times speed driving mechanism with this.On input shaft 33a, set firmly driving gear 31a, on output shaft, set firmly driven gear 32a, on tween drive shaft 35a, set firmly gear 351a and 352a that two numbers of teeth equate, gear 351a and driving gear 31a engagement, gear 352a and driven gear 32a engagement, the ratio of number of teeth of driving gear 31a and driven gear 32a is 2: 1.At this, output shaft 34a among times speed driving mechanism 3a and passive axis 2a are an axle.A pair of foot-operated crank 4a and 5a are located at the two ends of input shaft respectively, after being installed in this mechanism on the unpowered vehicle, the bicyclist scrunches this crank by stretcher and gives the power of input shaft with continuous rotation, the power driven noncircular chain wheel that can export a rotation on output shaft rotates, its foot-operated crank rotates a week, but not the circle sprocket wheel then rotated for two weeks in the same way.
In the present embodiment, owing to increased tween drive shaft 35a and gear 351a and 352a, turning to of non-round hinge wheel 1a is just consistent with the rotation direction of stretcher.
As shown in Figure 5, another sprocket wheel provided by the invention turn to double-speed chain wheel drive unit identical with turning to of stretcher and that can exchange on the contrary, it comprises a non-round hinge wheel 1b, it is located on the passive axis 2b, also comprise a cover times speed driving mechanism 3b, it comprises an input shaft 33b, an output shaft 34b and a tween drive shaft 35b, and the revolution ratio of input shaft and output shaft is 1: 2, sets the number of teeth of each gear of this times speed driving mechanism with this.On input shaft 33b, be provided with slidably gear cluster, it comprises a driving gear 311b and a driving gear 312b, on output shaft 34b, set firmly driven gear 341b and 342b, on tween drive shaft 35b, set firmly two gear 351b and 352b, wherein, the gear 342b engagement that sets firmly on gear 352b on the tween drive shaft 35b and the output shaft 34b, driving gear 331b in the slide teeth wheels on input shaft 33b can mesh with the gear 341b on the output shaft 34b by sliding, the slip of slide teeth wheels makes another a driving gear 312b in the slide teeth wheels that can make again behind said gear 311b and the gear 341b jump out of mesh on the input shaft and a fixed gear wheel 351b engagement on the tween drive shaft 35b, and by another fixed gear wheel 352b on the tween drive shaft 35b and another gear 342b on the output shaft 34b engagement power passed to output shaft 34b and connect firmly together passive axis, non-round hinge wheel 1b is rotated.A pair of foot-operated crank 4b and 5b are located at the two ends of input shaft respectively.
When the slide teeth wheels on the input shaft 33b slide into the gear 341b engagement that makes on driving gear 311b and the output shaft 34b, the switched in opposite that turns to and scrunch stretcher of non-round hinge wheel.Make driving gear 312b and the tween drive shaft 35b 351b engagement that cogs when slidingly inputing gear cluster on the 33b, mesh by another gear 352b on the tween drive shaft 35b and the gear 342b on the output shaft 34b, then non-round hinge wheel just turns to scrunch turning to of stretcher consistent again.
As shown in Figure 6, times speed driving mechanism in this actuating device is a chain drive, non-round hinge wheel 1c wherein is fixedly arranged on the passive axis 2c, times speed driving mechanism 3c, it comprises two sprocket wheels: drive sprocket 31c and driven gear 32c and an input shaft 33c and an output shaft 34c, drive sprocket 31c is fixedly arranged on the input shaft 33c, and driven sprocket 32c is fixedly arranged on the output shaft 34c, and the ratio of number of teeth of drive sprocket and driven sprocket is 2: 1.At this, it is an axle that output shaft 34c among times speed driving mechanism 3c and passive axis 2c connect firmly.
As shown in Figure 7, two 1d, 1e that the non-round hinge wheel in this actuating device has nothing in common with each other for the shape size, it all connects firmly on passive axis 2, and embodiment as shown in Figure 3 is identical for other structure.In the middle of the reality, the round sprocket wheel of one or several different sizes is set in most the hinge wheels that can also be provided with on passive axis, uses the unpowered vehicle of this actuating device can have the function of common car.
Claims (9)
1, a kind of unpowered vehicle double-speed chain wheel drive unit, comprise a non-round hinge wheel, it is located on the passive axis, it is characterized in that: also comprise a cover times speed driving mechanism, it includes an input shaft and an output shaft at least, and this passive axis is connected with the output shaft of described times of speed driving mechanism; The transmitting ratio of described times of speed driving mechanism is 1: 2.
2, double-speed chain wheel drive unit according to claim 1 is characterized in that: described times of speed driving mechanism is gear drive or chain wheel driving mechanism.
3, double-speed chain wheel drive unit according to claim 1, it is characterized in that: described times of speed driving mechanism is gear drive, wherein comprise a driving gear and a ring gear at least, the ratio of number of teeth of described driving gear and ring gear is 2: 1, described driving gear is fixedly arranged on the described input shaft, described ring gear is fixedly arranged on the described output shaft, and these two gears are meshing with each other.
4, double-speed chain wheel drive unit according to claim 3, it is characterized in that: between described input shaft and output shaft, establish tween drive shaft, be provided with thereon a gear as Jie's gear respectively with described input shaft on driving gear and the ring gear on output shaft engagement.
5, double-speed chain wheel drive unit according to claim 3, it is characterized in that: in described times of speed driving mechanism, establish tween drive shaft between input shaft and the output shaft, described tween drive shaft is provided with two gears, its respectively with described input shaft on driving gear and the ring gear on the described output shaft be meshed
6, double-speed chain wheel drive unit according to claim 1, it is characterized in that: described times of speed driving mechanism is gear drive, it comprises an input shaft, an output shaft and a tween drive shaft, on this input shaft, be provided with slidably gear cluster, it comprises two driving gears, sets firmly two driven gears on described output shaft, sets firmly two gears on described tween drive shaft, wherein, a gear mesh that sets firmly on gear on the tween drive shaft and the output shaft; In the slide teeth wheels on input shaft, constitute two drive paths by sliding:
Route one is: a driving gear in the slide teeth wheels and a gear mesh on the output shaft;
Route two is: a fixed gear wheel engagement on another driving gear in the slide teeth wheels and the tween drive shaft, and another fixed gear wheel on this tween drive shaft and the gear mesh on the output shaft.
7, according to the double-speed chain wheel drive unit described in any in the claim 1 to 6, it is characterized in that: also set firmly one or more hinge wheels at described passive axis.
8, double-speed chain wheel drive unit according to claim 7 is characterized in that: comprise one or more circle sprocket wheel and noncircular chain wheels in the described hinge wheel.
9, double-speed chain wheel drive unit according to claim 7 is characterized in that: the noncircular chain wheel that comprises several shape differences, different sizes in the described hinge wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159736 CN1225377C (en) | 2002-12-30 | 2002-12-30 | Multiplier speed chain wheel driving device for non motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159736 CN1225377C (en) | 2002-12-30 | 2002-12-30 | Multiplier speed chain wheel driving device for non motor vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1511755A true CN1511755A (en) | 2004-07-14 |
| CN1225377C CN1225377C (en) | 2005-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02159736 Expired - Fee Related CN1225377C (en) | 2002-12-30 | 2002-12-30 | Multiplier speed chain wheel driving device for non motor vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105923100A (en) * | 2016-04-14 | 2016-09-07 | 黄铃华 | Upright riding bicycle transmission device |
-
2002
- 2002-12-30 CN CN 02159736 patent/CN1225377C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105923100A (en) * | 2016-04-14 | 2016-09-07 | 黄铃华 | Upright riding bicycle transmission device |
| CN105923100B (en) * | 2016-04-14 | 2019-03-29 | 黄铃华 | Upright riding bicycle transmission device |
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| Publication number | Publication date |
|---|---|
| CN1225377C (en) | 2005-11-02 |
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Granted publication date: 20051102 Termination date: 20161230 |