CN1506596A - Toothed plate for pedal vehicle and man-powered machinery - Google Patents
Toothed plate for pedal vehicle and man-powered machinery Download PDFInfo
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- CN1506596A CN1506596A CNA021553653A CN02155365A CN1506596A CN 1506596 A CN1506596 A CN 1506596A CN A021553653 A CNA021553653 A CN A021553653A CN 02155365 A CN02155365 A CN 02155365A CN 1506596 A CN1506596 A CN 1506596A
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- fluted disc
- pitch circle
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Abstract
The present invention relates to toothed plate for chain transmission in pedal vehicle and man-powered machinery. The present invention features the elliptic toothed plate resulting in periodically altering instantaneous transmission ratio between the toothed plate and the flywheel to coordinate man-machine relationship automatically, make full use of man power, save body power and raise efficiency, being superior to circular toothed plate. The present invention has wide use in racing bicycle to shorten starting and accelerating time and raise speed; in speed varying bicycle to reduce stages; in goods tricycle to save labor; in common bicycle for raise speed and comfort; and body building apparatus and man-powered generator to overcome the effect of 'dead point'.
Description
Technical field the present invention relates to pedal man car (match bicycle, bicycle, the manpower freight of chain transmission ...), manual machine (fitness equipment, man-power generator ...) used fluted disc (drive sprocket).
The pedal man car of the known chain transmission of background technique, the used fluted disc of manual machine are circular, circular fluted disc and both instantaneous transmission ratios of flywheel (by movable sprocket) are always invariable, and two pin of human alternately firmly scrunch pedal rotating crank and fluted disc, every process that pin is finished once to exert oneself, crank and fluted disc rotate 180 °.Crank is different in different angular orientation people's the effective force that pedal power produced, the degree that suitable human body is exerted oneself also is different, when crank is near the vertical position, people's the effective force that pedal power produced is very little, and, because the leg that the people lifts is too crooked, be not suitable for firmly Pedalling, also be not suitable for utilizing human body gravity to press down pedal, the degree that suitable human body is exerted oneself is the poorest, going up a slope, against the wind, under the big situation of resistances such as acceleration even motionless dead point can occur pedaling, for the fast as far as possible crank that makes turns near the vertical position, save people's muscle power and avoid occurring manpower and pedal motionless " dead point ", then need instantaneous transmission ratio little (that is: fluted disc half is through little); When crank is near the horizontal position, people's the effective force maximum that pedal power produced, the most suitable human body of degree of people's leg bending firmly also is fit to utilize human body gravity to press down pedal.In order better to send out brightness, effectively to utilize people's muscle power, raise the efficiency, then need instantaneous transmission ratio big (that is: fluted disc half is through big).Obviously, circular fluted disc can't satisfy the needs of above different situations, can only take into account, and perhaps satisfies on the one hand, abandon on the other hand, so Applicable scope is also very narrow.Thereby known round tooth dish exists the defective that people one system of office coordinated, wasted people's muscle power inadequately, can not effectively utilize and give full play to people's physical efficiency.
Long-term one comes people researching and solving the defective of prior art always, patent documentation CN 2099079U (date of declaration on March 18th, 1992), a kind of bicycle cam fluted disc is disclosed, but the imagination profile of cam fluted disc is only disclosed, and do not disclose most important also is that the tooth of the cam fluted disc of most critical is a branch how, thereby is a kind of ideal scheme that can't implement.
Summary of the invention the purpose of this invention is to provide a kind of used fluted disc of pedal man car, manual machine that can overcome the chain transmission of prior art defective.
Pedal man car of the present invention, the manual machine fluted disc, it is characterized in that fluted disc is oval-shaped, oval-shaped fluted disc is through being the pitch circle arc AB of R by pitch circle half, CD and pitch circle half warp is the pitch circle arc BC of r, joint of the tangent composition of DA four parts is oval, the distribution of the oval upward tooth of joint is corresponding also to be made up of four parts, distribution and the pitch circle of the CD part tooth of AB and symmetry half warp is that the circular fluted disc of R is identical, distribution and the pitch circle of the DA part tooth of BC and symmetry half warp is that the circular fluted disc of r is identical, A, B, C, 4 of D are the point of contact, and all at the teeth groove center, and total number of teeth of fluted disc can only be even number.
Pedal man car of the present invention, manual machine fluted disc, it is characterized in that fluted disc is oblong, the long-round-shape fluted disc by straight line AB, CD and half through being that tangent to form a joint oval for pitch circle arc BC, DA four parts of r, save that oval distribution of going up tooth is corresponding also to be made up of four parts, AB is identical with tooth bar with the distribution of the CD part tooth of symmetry, distribution and the pitch circle of the DA part tooth of BC and symmetry half warp is that the circular fluted disc of r is identical, A, B, 4 of C, D are the point of contact, and all at the teeth groove center, and total number of teeth of fluted disc can only be even number.
The instantaneous transmission ratio of ellipse of the present invention or long-round-shape fluted disc and flywheel is periodically variable, when be fit to degree that human body exerts oneself better, people's the effective force that pedal power produced heals when big, the overmask of corresponding ellipse or long-round-shape fluted disc and chain is big through healing thirty, and promptly instantaneous transmission ratio is bigger; The degree that human body exerts oneself is poorer when being fit to, people's the effective force that pedal power produced more hour, overmask thirty of corresponding ellipse or long-round-shape fluted disc and chain is through littler, be that instantaneous transmission ratio is littler, realize automatic harmonizing people-system of office, more rational and efficient use, give full play to people's physical efficiency, save people's muscle power, raise the efficiency, and the people uses rickshaw, manual machine to feel lighter, more comfortable purpose.
Ellipse of the present invention or long-round-shape fluted disc are used to the bicycle of competing, and it is obvious to shorten starting, time for acceleration, the raising speed of a motor vehicle; Be used for the multi-change speed car, can reduce progression (reducing the quantity of fluted disc and flywheel); Be used for the manpower freight, the labor-saving effect is remarkable; Be used for ordinary bicycle, more brisk, comfortable; Be used for gymnastic apparatus, man-power generator etc. and can effectively improve " dead point " influence the people.
Description of drawings Fig. 1 is the structural representation of oval fluted disc.
Fig. 2 is the structural representation of long-round-shape fluted disc.
Fig. 3, Fig. 4 are the schematic representation that oval fluted disc or long-round-shape fluted disc are installed, used.
Embodiment oval fluted disc shown in Figure 1 is through being pitch circle arc (that is: the part of circular fluted disc pitch circle or the standard pitch circle) AB of R by pitch circle half, CD and pitch circle half warp is the pitch circle arc BC of r, one of the tangent composition of DA four parts joint oval (that is: the ellipse of chordal pitch branch the ellipse of tooth branch) in other words, the distribution of the oval upward tooth of joint is corresponding also to be made up of four parts, distribution and the pitch circle of the CD part tooth of AB and symmetry half warp is that the circular fluted disc of R is identical, distribution and the pitch circle of the DA part tooth of BC and symmetry half warp is that the circular fluted disc of r is identical, A, B, C, 4 of D are the point of contact, and all at the teeth groove center.Determining has related parameter with calculating, at first select total tooth number Z of oval fluted disc according to purposes, because A, B, C, D four point of contacts have determined total tooth number Z can only select even number all at the teeth groove center, pitch circle half warp under the DA part of selected again BC and symmetry is the tooth number Z of the circular fluted disc of r
r, also can only select even number, selected again pitch P
α=360 °/Z then
r
r＝P/2sin(180°/Z
r)
Be to select point of contact A (B, C, D) on the pitch circle of r at radius then, must can select a at the center of teeth groove
1, a
2Deng, the number of teeth of AB, CD pitch circle arc part is
Z
AB＝〔Z-(Z
r-4n)〕/2
N is the pitch number that selected point of contact A is ordered apart from a in the formula, and for example point of contact A selects a
2Point, then: n=2
β=2n α/Z then
AB=2n360 °/Z
rZ
AB
R＝P/2sin(360°n/Z
rZ
AB)
L=(R-r) sin (360 ° of n/Z
r) pay special attention to be Z
rNumerical value and point of contact A selected extremely important, after total tooth number Z of oval fluted disc is selected, Z
rWith the selection of point of contact A, determine and influence the optimum shape of oval fluted disc.Selected principle is: the one, help laborsaving, the 2nd, help giving full play to of people's physical efficiency, the 3rd, guarantee the optimum Working of fluted disc and chain engages.Selected optimum scheme is: Z
rScope is 1.1＜Z/Z
r＜1.4, the point of contact is selected in a
1Or a
2The point.With reference to circular fluted disc standard, selected profile of tooth calculates the related parameter that has of tooth top ellipse, tooth root ellipse, thereby designs needed oval fluted disc then.
Oblong fluted disc shown in Figure 2 is by straight line AB, CD and half warp are the pitch circle arc BC of r, joint of the tangent composition of DA four parts oval (that is: the oval tooth in other words branch of chordal pitch branch is oval), save that oval distribution of going up tooth is corresponding also to be made up of four parts, AB is identical with tooth bar with the distribution of the CD part tooth of symmetry, distribution and the pitch circle of the DA part tooth of BC and symmetry half warp is that the circular fluted disc of r is identical, A, B, C, 4 of D are the point of contact, and all at the teeth groove center, determining has related parameter with calculating, at first according to purposes, total tooth number Z of selected long-round-shape fluted disc, because A, B, C, D four point of contacts are all at the teeth groove center, determined total tooth number Z can only select even number, pitch circle half warp under the DA part of selected again BC and symmetry is the tooth number Z of the circular fluted disc of r
r, also can only select even number, selected again pitch P
α=360 °/Z then
r
r＝P/2sin(180°/Z
r)
The number of teeth of AB, CD straightway part is Z
AB
Z then
AB=(Z-Z
r)/2
L=PZ
ABThat pays special attention to is Z
rNumerical value selected extremely important, after total tooth number Z of long-round-shape fluted disc is selected, Z
rSelection, decision and influence the optimum shape of long-round-shape fluted disc.Selected principle is: the one, help laborsaving, the 2nd, help giving full play to of people's physical efficiency, the 3rd, guarantee the optimum Working of fluted disc and chain engages.Selected optimum scheme is: Z
rScope is 1.1＜Z/Z
r＜1.4.With reference to circular fluted disc standard, selected profile of tooth, calculate the related parameter that has that tooth top is oval, tooth root is oval, thereby design needed long-round-shape fluted disc then.
Shown in Figure 3, the installation of ellipse or long-round-shape fluted disc 1, crank 2 is in vertical position G
1, the overmask point A ' of ellipse or long-round-shape fluted disc 1 and chain 3 is on the minor axis of ellipse or long-round-shape fluted disc 1, and angle theta is the best angle of ellipse or long-round-shape fluted disc 1 and crank 2 installations.
Fig. 3, shown in Figure 4, F are the main active force of people's step tread 4, and set direction is (people is the easiest make the power that scrunches that is added on the pedal and people utilize self gravitation to make be added in the direction of the main power on the pedal for vertically downward) vertically downward.When crank 2 is in vertical position G
1In the time of near the point, people's the effective force that pedal power produced is very little, and the degree that suitable human body is exerted oneself is the poorest, and is corresponding, and fluted disc 1 and chain 3 are nibbled near near its minor axis through being in fluted disc of near point half (smaller part through), that is: instantaneous transmission ratio is little; Reached make crank fast as far as possible turn near the vertical position, save the people muscle power, improve and avoid occurring the purpose that manpower is pedaled motionless " dead point "; When crank 2 turns over G
1The point, angle α is bigger, people's the effective force p that pedal power produced bigger (p=Fsin α), and, because the degree of people's leg bending more is fit to firmly Pedalling, also more is fit to utilize human body gravity to press down pedal, the degree that suitable human body is exerted oneself better, correspondence, fluted disc 1 is nibbled near point half through also bigger with chain 3, that is: instantaneous transmission ratio is bigger; When crank 2 forwards near horizontal position G
2During point, effective force p maximum (p=F), also the most suitable human body is exerted oneself, correspondence, fluted disc and chain are nibbled near point half through also maximum, that is: the instantaneous transmission ratio maximum; Reached and better sent out brightness, effectively utilize people's physical efficiency, the purpose of raising the efficiency.When crank 2 rotates convergence vertical position G
3Point, bigger with angle of entry α, effective force p littler (p=Fsin (180 °-α)), correspondence, fluted disc 1 is nibbled near point half through also little with chain 3, that is: instantaneous transmission ratio is littler ...
Degree of tightness changes because the shape of ellipse or long-round-shape fluted disc has determined to produce periodically by the chain that is engaged with, and for the rickshaw that does not have tight sprocket wheel or chain tightener, manual machine, tight sprocket wheel is installed preferably.
Claims (4)
1, is used for the pedal man car of chain transmission, the fluted disc of manual machine, it is characterized in that, fluted disc is oval-shaped, oval-shaped fluted disc by pitch circle half through being pitch circle arc AB, the CD of R and pitch circle half through being that tangent to form a joint oval for pitch circle arc BC, DA four parts of r, the distribution of the oval upward tooth of joint is corresponding also to be made up of four parts, distribution and the pitch circle of the CD part tooth of AB and symmetry half warp is that the circular fluted disc of R is identical, distribution and the pitch circle of the DA part tooth of BC and symmetry half warp is that the circular fluted disc of r is identical, A, B, 4 of C, D are the point of contact, and all at the teeth groove center.
According to claim 1 described fluted disc, it is characterized in that 2, the number of teeth of fluted disc is an even number.
3, be used for the pedal man car of chain transmission, the fluted disc of manual machine, it is characterized in that, fluted disc is oblong, the long-round-shape fluted disc by straight line AB, CD and half through being that tangent to form a joint oval for pitch circle arc BC, DA four parts of r, save that oval distribution of going up tooth is corresponding also to be made up of four parts, AB is identical with tooth bar with the distribution of the CD part tooth of symmetry, distribution and the pitch circle of the DA part tooth of BC and symmetry half warp is that the circular fluted disc of r is identical, A, B, 4 of C, D are the point of contact, and all at the teeth groove center.
According to claim 3 described fluted discs, it is characterized in that 4, the number of teeth of fluted disc is an even number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021553653A CN1506596A (en) | 2002-12-11 | 2002-12-11 | Toothed plate for pedal vehicle and man-powered machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021553653A CN1506596A (en) | 2002-12-11 | 2002-12-11 | Toothed plate for pedal vehicle and man-powered machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1506596A true CN1506596A (en) | 2004-06-23 |
Family
ID=34235879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021553653A Pending CN1506596A (en) | 2002-12-11 | 2002-12-11 | Toothed plate for pedal vehicle and man-powered machinery |
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| Country | Link |
|---|---|
| CN (1) | CN1506596A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011020443A1 (en) * | 2009-08-20 | 2011-02-24 | 天津滨海新区鑫轮传动技术有限公司 | Ferry gear, ferry gear set and automatic transmission employing the ferry gear |
| TWI399322B (en) * | 2010-06-04 | 2013-06-21 | Chia Wei Hsu | Sprocket of a bicycle |
| TWI593598B (en) * | 2017-04-11 | 2017-08-01 | 傳誠技研有限公司 | Combination of an eccentric sprocket and a crank of a bicycle |
| TWI722688B (en) * | 2019-11-28 | 2021-03-21 | 國立虎尾科技大學 | Bicycle with compound sprocket composed of four elliptical arcs |
-
2002
- 2002-12-11 CN CNA021553653A patent/CN1506596A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011020443A1 (en) * | 2009-08-20 | 2011-02-24 | 天津滨海新区鑫轮传动技术有限公司 | Ferry gear, ferry gear set and automatic transmission employing the ferry gear |
| TWI399322B (en) * | 2010-06-04 | 2013-06-21 | Chia Wei Hsu | Sprocket of a bicycle |
| TWI593598B (en) * | 2017-04-11 | 2017-08-01 | 傳誠技研有限公司 | Combination of an eccentric sprocket and a crank of a bicycle |
| TWI722688B (en) * | 2019-11-28 | 2021-03-21 | 國立虎尾科技大學 | Bicycle with compound sprocket composed of four elliptical arcs |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |