CN101654141A - Variable-speed bicycle driving mechanism driven by external-gearing planet gear chain - Google Patents
Variable-speed bicycle driving mechanism driven by external-gearing planet gear chain Download PDFInfo
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- CN101654141A CN101654141A CN200910144889A CN200910144889A CN101654141A CN 101654141 A CN101654141 A CN 101654141A CN 200910144889 A CN200910144889 A CN 200910144889A CN 200910144889 A CN200910144889 A CN 200910144889A CN 101654141 A CN101654141 A CN 101654141A
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Abstract
The invention relates to a variable-speed bicycle driving mechanism driven by an external-gearing planet gear chain, comprising a central shaft (4) and a chain wheel (11) arranged on the central shaft, wherein a speed increasing device is also arranged on the central shaft. The variable-speed bicycle driving mechanism is characterized in that a variable-speed mechanism is arranged on the central shaft and comprises a connecting device, a fixed gear wheel (15), a chain wheel (11), an axial planet gear (12), planet gears (1) and (2), central wheels (3) and (7) and a variable-speed sleeve (6). The invention has the advantages that the variable-speed driving of the single-stage fixed chain wheel can be achieved; the driving ratio between a master chain wheel and an assistant chain wheel is increased, and the driving radiuses of the master chain wheel and the assistant chain wheel are respectively reduced and increased so as to achieve the functions of rapidness and portability; a rolling friction structure is considerably adopted in the relative motion among all components, and the power loss in the driving can be effectively reduced; and the variable-speed bicycle driving mechanism driven by the external-gearing planet gear chain is simple in structure and easy to process and manufacture.
Description
Technical field:
The present invention relates to a kind of bicycle middle shaft driver train, especially a kind of variable-speed bicycle driving mechanism driven by external-gearing planet gear chain.
Background technology:
At present, bicycle still is most Chinese people's a traffic means of transport, what the adult of production and sales for many years and child's bicycle still adopted is the speed change type of drive of single-stage chain-driving or change chain and the realization of sprocket engagement position, axis directly and sprocket wheel be connected to form the driving driving member, because what it adopted is the single-stage chain-driving, the raising of its speed is subjected to certain restriction; The structure slightly complicated of change chain and sprocket engagement position realization multi-change speed and poor for applicability.
Summary of the invention:
Purpose of the present invention is exactly in order to overcome the existing defective that single-stage chain-driving bicycle speed is immutable and propulsive effort is bigger, and provide a kind of variable-speed bicycle driving mechanism driven by external-gearing planet gear chain, the driven at low speed power that can realize going up a slope is little, and the level road constance force drives the speed that drives than original design single-stage chain and obviously improves.
Technical scheme of the present invention:
Variable-speed bicycle driving mechanism driven by external-gearing planet gear chain: comprise axis and be arranged on sprocket wheel on the axis, also be provided with boost installation on the axis, it is characterized in that:
A, axis are provided with three connecting devices, and the axis outside is provided with speed change cover gap and cooperates, and speed change puts and is provided with and the corresponding connecting bore of connecting device, is provided with jam nut on the axis in the speed change cover outside;
B, speed change cover outside are provided with sprocket wheel, and sprocket wheel endoporus circumference is provided with one group of connecting bore and is connected with connecting device, upwards is provided with one group of equidistant axis hole in the footpath of sprocket wheel; Side at sprocket wheel is provided with one group of axle planetary wheel, and each planetary axle cooperates with cooresponding through hole, the common and fixed gear wheel cover engagement of this group axle planetary wheel, and fixed gear wheel cover and axis free-running fit constitute the low speed bicycle driving mechanism;
C, be provided with one group of planetary wheel at the opposite side of sprocket wheel, each planetary wheel is captiveed joint with the planetary axle of cooresponding axle respectively, common and the sun gear engagement of this group planetary wheel, sun gear cooperates with speed change cover gap, sun gear endoporus circumference is provided with one group of connecting bore and is connected with connecting device on the axis, constitutes the middling speed bicycle driving mechanism;
D, at planetary wheel of each planetary opposite side series connection, each planetary wheel is captiveed joint with the planetary axle of cooresponding axle respectively, common and the sun gear engagement of this group planetary wheel, sun gear cooperates with speed change cover gap, sun gear endoporus circumference is provided with one group of connecting bore and is connected with connecting device on the axis, constitutes the high-speed bicycle driver train.
On the basis of above-mentioned main technical schemes, can increase following further perfect technical scheme:
Described one group of axle planetary wheel can be two or more planetary wheels, and described planetary wheel, planetary wheel are identical with axle planetary wheel number.
Described three connecting devices, axis axially on two adjacent connecting device spacing 5～25mm, the angle of its two adjacent connecting devices is 60～120 ° diametrically, described connecting device is made of silk spring, ratchet, axis is provided with pawl slot, be provided with deep gouge in the pawl slot, a silk spring that is provided with in the pawl slot in ratchet and the deep gouge is connected; Described connecting device is by spring, radially feather key constitutes, and axis is provided with radially keyway, radially is provided with spring in the keyway and is connected with feather key radially.
The described speed change cover outside is provided with speed change and handles baffle plate.
Between sprocket wheel and axle planetary wheel, planetary wheel, be provided with ball, in the relevant design calculating of sprocket wheel with sun gear external toothing planetary wheel, chain-driving bicycle driving mechanism:
1, ordinary person's power is calculated roughly:
1), the ordinary person with the 65kg quality upstairs calculates: general stair one shoulder height is 180mm, establishes 1 second last step, and then ordinary person's power is:
P＝mgh/s＝65×9.8×0.18/1＝114.66W
2), drive bicycle crank arm one week measuring and calculating with ordinary person's both feet with fixed drive power: each half cycle propulsive effort of general left and right sides bipod is 250N---300N, if propulsive effort size, direction are all constant and value 250N, driving 1 by input changeed/1.5 seconds, driving the arm of force changes with rotational angle, maximum is made as 0.2 meter, and ordinary person's power should be:
Power P=120W by above two kinds of desirable ordinary persons of rough measuring and calculating.
2, the ride average driving moment M of bicycle of ordinary person calculates:
M＝p/w＝p·s/φ＝120·1.5/2π＝28.66N·m。
Disregard loss in efficiency, by the speed calculation of the design's overall gear ratio i=4.4: (promptly main the driving goed around, and bicycle rear changes 4.4 and changes)
V=26 * 25.4 * 3.14 * 40 * 4.4 * 60/1000=21.90km/h (reaching the national limited speed standard of battery-driven car).
3, three of the bicycle rear drive torque kinds of theory of computation checkings:
1), the rotational angular velocity of trailing wheel calculates:
ω＝4.4×6.28/1.5＝18.42rad/s；
2), the speed calculation at trailing wheel center:
V＝26×25.4×3.14×40×4.4×60/1000/3600＝6.08m/s。
3), the translation propulsive effort of bicycle calculates:
F＝P/V＝120/6.08＝19.72N。
4), the driving moment of couple of bicycle rear is calculated:
M＝F×R＝19.72×(26×25.4/2/1000)＝6.5N.m。
5), the driving moment of couple of bicycle rear method calculating in addition:
M＝P/ω＝120/18.42＝6.5N.m。
6), the calculating of the rolling resistance of bicycle rear idol square:
If ride people's quality 80Kg then the power of ground effects on two-wheeled should be 80 * 9.8N, check in tire and ground-surface coefficient of rolling friction δ=2-10, consider the unfavorable factor (the softer or underinflation of tire in road surface) of road surface and tire, value δ=8, then two-wheel rolling resistance idol square M=80 * 9.8 * 10/1000=6.27N.m.
By 4), 5), 6) three kinds of method of calculating results are in full accord, illustrate that it drives design is fully feasible.
4, the design of module of gear: the transmitting ratio by the design's planet circular system is 4, and then the transmitting torque of this gear is 1/4 of an average driving moment---28.66/4=7.165N.m ascends the throne.
Machine design formula by modulus:
Consider to get from the processing technology angle: m=1.5mm.
The invention has the beneficial effects as follows and to realize single-stage fixed chain wheels variable speed drive (VSD); The transmitting ratio of master and slave sprocket wheel is increased, and make master and slave chain wheel driving radius reduce respectively and increase, quick to realize, light function; Relative motion between each member is considered to adopt rolling friction structure, can effectively reduce the loss in efficiency in the transmission; External toothing epicyclic chain driving bicycle driving mechanism structure is simple, is easy to processing and manufacturing.
Description of drawings of the present invention:
Fig. 1 looks accompanying drawing for master of the present invention;
Fig. 2 is connecting device embodiment one of the present invention;
Fig. 3 is connecting device embodiment two of the present invention.
1. planetary wheels among the figure, 2. planetary wheel, 3. sun gear, 4. axis, 5. jam nut, 6. speed change cover, 7. sun gear, 8. flat key, 9. screw, 10. speed change is handled baffle plate, 11. sprocket wheel, 12. planetary wheels, 13. needle bearings, 14. roller, 15. fixed gear wheel covers, 16. feather keys radially, 17. spring, 18. springs, 19. ratchets.
The specific embodiment
Embodiment one
As shown in Figure 1, variable-speed bicycle driving mechanism driven by external-gearing planet gear chain, comprise axis 4, axis is the step axle, axle is provided with radially keyway of screw thread and three, two adjacent keyways axis axially on distance about 10mm is arranged, 90 ° angle is arranged diametrically, the radially feather key 16 that each radially is provided with a spring 17 and links to each other with spring in the keyway, speed change cover 6 of hub setting on the axis, speed change puts and is provided with three connecting bores that match with feather key radially, speed change puts sprocket wheel 11 of hub setting, sprocket wheel cooperates with speed change cover gap and can relatively rotate, as shown in Figure 2, evenly being provided with eight connecting bores on the sprocket wheel endoporus circumference matches with feather key radially, on the isometrical circumference of sprocket wheel, evenly be provided with two axis holes, be provided with two axle planetary wheels 12 in sprocket wheel one side, each planetary wheel is provided with an axostylus axostyle and axis hole is connected by needle bearing 13, two common and fixed gear wheel cover 15 engagements of axle planetary wheel, fixed gear wheel is arranged with axial sleeve, sleeve is provided with and bicycle bottom bracket bonded assembly hickey, and the fixed gear wheel cover passes through the ball normal-running fit with axis 4; Opposite side at sprocket wheel is provided with two planetary wheels 1, each planetary wheel is connected by flat key 8 with a planetary axostylus axostyle of axle respectively, two common and sun gear 7 engagements of planetary wheel, the sun gear hub setting puts in speed change, evenly being provided with eight connecting bores on the sun gear 7 endoporus circumference matches with feather key 16 radially, planetary wheel 2 of each planetary opposite side series connection, this planetary wheel is captiveed joint with flat key 8 by screw 9 with the axostylus axostyle of corresponding axle planetary wheel 12 respectively, two planetary wheel 2 common and sun gear 3 engagements, sun gear 3 hub settings are on speed change cover 6, sun gear cooperates with speed change cover gap and can relatively rotate, evenly being provided with eight connecting bores on the sun gear 3 endoporus circumference matches with feather key 16 radially, on the axis in the speed change cover outside, be provided with jam nut 5, the speed change cover outside also is provided with speed change and handles baffle plate 10, and speed change is handled baffle plate and is connected by screw retention with the speed change cover.
The speed-change process of variable-speed bicycle driving mechanism driven by external-gearing planet gear chain is: can make the speed change cover be in different circumferential positions by the foot-operated speed change manipulation baffle plate that rotates, so that axis is by the radially feather key and the planetary wheel carrier of diverse location on it, speed change cover or with different sun gears, the speed change cover realizes that interlocking is fixedly connected to form member to reach the speed change purpose, when handling baffle plate 10 with the foot-operated speed change of rotating, when making the radially feather key 16 that is in axis and speed change inner room embed in the connecting bore of sprocket wheels 11 is driven at low speed, simultaneously, the radially feather key of other two positions is pressed into the radially keyway of axis by the speed change cover; Stepping on the moving speed change of walking around again is high-speed driving when handling in the connecting bore that baffle plate makes radially feather key 16 embeddings one sun gear 7 that is in axis and speed change inner room for 90 °; Stepping on when changing speed and handling baffle plate and make for 90 ° the radially feather key 16 that is in axis and speed change inner room embed in the connecting bore of another sun gears 3 once more is the middling speed driving.
Embodiment two
As shown in Figure 1, variable-speed bicycle driving mechanism driven by external-gearing planet gear chain, comprise axis 4, axis is the step axle, axle is provided with screw thread and three place's pawl slots, be provided with a deep gouge in each pawl slot, two adjacent pawl slots axis axially on distance about 15mm is arranged, 120 ° angle is arranged diametrically, a silk spring 18 that is provided with in the pawl slot in ratchet 19 and the deep gouge is connected, speed change cover 6 of hub setting on the axis, speed change puts and is provided with three connecting bores that match with ratchet, speed change puts sprocket wheel 11 of hub setting, as shown in Figure 3, evenly being provided with four connecting bores on the sprocket wheel endoporus circumference matches with ratchet, on the isometrical circumference of sprocket wheel, evenly be provided with three axis holes, be provided with three axle planetary wheels 12 in sprocket wheel one side, each planetary wheel is provided with an axostylus axostyle and axis hole is connected by needle bearing 13, three common and fixed gear wheel cover 15 engagements of axle planetary wheel, fixed gear wheel is arranged with axial sleeve, sleeve is provided with and bicycle bottom bracket bonded assembly hickey, and the fixed gear wheel cover passes through the ball normal-running fit with axis; Opposite side at sprocket wheel is provided with three planetary wheels 1, each planetary wheel 1 is connected by flat key 8 with a planetary axostylus axostyle of axle respectively, three common and sun gear 7 engagements of planetary wheel, sun gear 7 hub settings put in speed change, sun gear cooperates with speed change cover gap and can relatively rotate, evenly being provided with four connecting bores on the sun gear endoporus circumference matches with ratchet 19, planetary wheel 2 of opposite side series connection of each planetary wheel 1, this planetary wheel 2 is captiveed joint with flat key 8 by screw 9 with the planetary axostylus axostyle of corresponding axle, three planetary wheel 2 common and sun gear 3 engagements, the sun gear hub setting puts in speed change, evenly being provided with four connecting bores on the sun gear 3 endoporus circumference matches with ratchet, on the axis in the speed change cover outside, be provided with jam nut 5, the speed change cover outside also is provided with speed change and handles baffle plate 10, and speed change is handled baffle plate and is connected by screw retention with the speed change cover.
Between sprocket wheel and axle planetary wheel, planetary wheel, sun gear, be provided with roller 14.
Three fast external toothing planetary wheels, the speed-change process of chain-driving bicycle driving mechanism is: can make the speed change cover be in different circumferential positions by the foot-operated speed change manipulation baffle plate that rotates, so that axis is by the ratchet and the planetary wheel carrier of diverse location on it, speed change cover or with different sun gears, the speed change cover realizes that interlocking is fixedly connected to form member to reach the speed change purpose, when handling baffle plate 10 with the foot-operated speed that changes, when making the ratchet 19 that is in 6 in axis 4 and speed change cover embed in the connecting bore of sprocket wheels 11 is driven at low speed, simultaneously, the ratchet of other two positions is pressed in the pawl slot of axis by the speed change cover; When stepping on rotating speed and handle in the connecting bore that baffle plate makes ratchet 19 embeddings one sun gear 7 that is in axis and speed change inner room for 120 °, be high-speed driving again; Stepping on when changing speed and handling baffle plate and make for 120 ° the ratchet 19 that is in axis and speed change inner room embed in the connecting bore of another sun gears 3 once more is the middling speed driving.
The fixed gear wheel cover 15 of variable-speed bicycle driving mechanism driven by external-gearing planet gear chain is provided with axial sleeve, sleeve is provided with and bicycle middle shaft sleeve bonded assembly outside thread interface, it is screwed be fixed on the axis socket end, the fixed gear wheel cover forms revolute pair with middle between centers, pass through direct drive respectively, different sun gears on sprocket wheel or the driving axis reach with its planet gear meshed member its motion are reached sprocket wheel, thereby the sprocket rotation that drives on the bicycle rear by chain moves ahead with the fast drivings of difference that realize bicycle.
Claims (8)
1, variable-speed bicycle driving mechanism driven by external-gearing planet gear chain comprises axis (4) and is arranged on sprocket wheel (11) on the axis, also is provided with boost installation on the axis, it is characterized in that:
A, axis (4) are provided with three connecting devices (16), hub setting speed change cover (6) on the axis, and speed change puts and is provided with and the corresponding connecting bore of connecting device, is provided with jam nut (5) on the axis in the speed change cover outside;
B, speed change put hub setting sprocket wheel (11), and sprocket wheel endoporus circumference is provided with one group of connecting bore and cooperates with connecting device (16), upwards is provided with one group of equidistant axis hole in the footpath of sprocket wheel; Side at sprocket wheel is provided with one group of axle planetary wheel (12), each planetary axle cooperates with cooresponding axis hole, common and fixed gear wheel cover (15) engagement of this group axle planetary wheel, the fixed gear wheel cover constitutes revolute pair with axis, constitutes the low speed bicycle driving mechanism;
C, be provided with one group of planetary wheel (1) at the opposite side of sprocket wheel, each planetary wheel is captiveed joint with the planetary axle of cooresponding axle respectively, common and sun gear (3) engagement of this group planetary wheel, the sun gear hub setting puts in speed change, sun gear endoporus circumference is provided with one group of connecting bore and cooperates with connecting device, constitutes the middling speed bicycle driving mechanism;
D, be provided with a planetary wheel (2) in each planetary opposite side series connection, each planetary wheel (2) is captiveed joint with the planetary axle of cooresponding axle respectively, common and sun gear (7) engagement of this group planetary wheel (2), the sun gear hub setting puts in speed change, sun gear endoporus circumference is provided with one group of connecting bore and cooperates with connecting device, constitutes the high-speed bicycle driver train.
2, variable-speed bicycle driving mechanism driven by external-gearing planet gear chain according to claim 1 is characterized in that: described one group of axle planetary wheel can be two or more planetary wheels (12).
3, variable-speed bicycle driving mechanism driven by external-gearing planet gear chain according to claim 2 is characterized in that: described planetary wheel (1), planetary wheel (2) are identical with axle planetary wheel (12) number.
4, variable-speed bicycle driving mechanism driven by external-gearing planet gear chain according to claim 1, it is characterized in that: described three connecting devices (16), axis axially on two adjacent connecting device spacing 5～25mm, the angle of two adjacent diametrically connecting devices is 60～120 °.
5, according to claim 1 or 4 described variable-speed bicycle driving mechanism driven by external-gearing planet gear chain, it is characterized in that: described connecting device is by spring (18), radially feather key (17) constitutes, axis is provided with radially keyway, radially is provided with spring in the keyway, and spring is connected with feather key radially.
6, according to claim 1 or 4 described variable-speed bicycle driving mechanism driven by external-gearing planet gear chain, it is characterized in that: described connecting device is made of silk spring (19), ratchet (20), axis is provided with pawl slot, be provided with deep gouge in the pawl slot, a silk spring that is provided with in the pawl slot in ratchet and the deep gouge is connected.
7, according to claim 1 or 3 described variable-speed bicycle driving mechanism driven by external-gearing planet gear chain, it is characterized in that: between sprocket wheel and axle planetary wheel, planetary wheel, sun gear, be provided with roller (14).
8, variable-speed bicycle driving mechanism driven by external-gearing planet gear chain according to claim 1 is characterized in that: the speed change cover outside also is provided with speed change and handles baffle plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910144889XA CN101654141B (en) | 2009-09-09 | 2009-09-09 | Variable-speed bicycle driving mechanism driven by external-gearing planet gear chain |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910144889XA CN101654141B (en) | 2009-09-09 | 2009-09-09 | Variable-speed bicycle driving mechanism driven by external-gearing planet gear chain |
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| Publication Number | Publication Date |
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| CN101654141A true CN101654141A (en) | 2010-02-24 |
| CN101654141B CN101654141B (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910144889XA Expired - Fee Related CN101654141B (en) | 2009-09-09 | 2009-09-09 | Variable-speed bicycle driving mechanism driven by external-gearing planet gear chain |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241340A (en) * | 2013-04-25 | 2013-08-14 | 梁建华 | Permanent magnet variable-speed driving device |
| CN104608872A (en) * | 2015-02-11 | 2015-05-13 | 吕元胜 | Circular-ring curved-surface planet stepless transmission and bicycle with same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2180584Y (en) * | 1994-02-06 | 1994-10-26 | 周祯祥 | Bicycle speed changing device |
| CN1509936A (en) * | 2002-12-26 | 2004-07-07 | 祺 周 | Disk speed transmission of bicycle |
| CN201530457U (en) * | 2009-09-09 | 2010-07-21 | 赵成会 | Driving mechanism of external engaged planetary-gear chain transmission variable speed bicycle |
-
2009
- 2009-09-09 CN CN200910144889XA patent/CN101654141B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241340A (en) * | 2013-04-25 | 2013-08-14 | 梁建华 | Permanent magnet variable-speed driving device |
| CN103241340B (en) * | 2013-04-25 | 2016-01-20 | 梁建华 | A kind of magneto speed-changing driving device |
| CN104608872A (en) * | 2015-02-11 | 2015-05-13 | 吕元胜 | Circular-ring curved-surface planet stepless transmission and bicycle with same |
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| Publication number | Publication date |
|---|---|
| CN101654141B (en) | 2012-07-04 |
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