CN1135992A - Crank and chain-wheel mechanism with high output performance - Google Patents
Crank and chain-wheel mechanism with high output performance Download PDFInfo
- Publication number
- CN1135992A CN1135992A CN 96116844 CN96116844A CN1135992A CN 1135992 A CN1135992 A CN 1135992A CN 96116844 CN96116844 CN 96116844 CN 96116844 A CN96116844 A CN 96116844A CN 1135992 A CN1135992 A CN 1135992A
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- crank
- chain
- wheel mechanism
- sprocket
- shaft
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- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
A crank-sprocket mechanism with high output performance is composed of crank, crank axle and sprocket, and features that a sprocket assembly consists of elliptic toothed disk with two drive pin arranged at 180 deg and a ring holder of internal bearing and has a center that is under crank axle and fixed to stand of supporting sleeve tube of sprocket, right and left cranks are installed to both ends of crank axle, a driven short crank is fixed to inner side of right crank, and slide slot is made on one side of right and driven short cranks.
Description
The Elliptic chain wheel that the present invention relates to a kind of bicycle is with respect to the crank split, and its center of circle moves down the crank and chain-wheel mechanism than high output performance of having of postposition (hereinafter to be referred as biasing) with respect to crank shaft off-centre.
At present, continued to use the bicycle of the crank rotary type in more than 100 year, be output performance owing to can not further improve the energy conversion efficiency of acceptance, thereby limited the improvement of the laborsaving degree of cycling and the further raising of speed.
The objective of the invention is to avoid above-mentioned weak point of the prior art and a kind of crank length that do not increase is provided, crank and chain-wheel mechanism that also can bigger raising output performance.
Purpose of the present invention can reach by following measure:
A kind of crank and chain-wheel mechanism of high output performance, it is made up of crank, crank shaft, sprocket wheel, the circle type seat 6 that it is characterized in that the built-in bearing of 2 centimetres of oval fluted disc 7 interior radius of circles constitutes the ring shaped sprocket assemblies, and oval fluted disc 7 becomes 180 ° of fixed angle that two transmission pins 9 and 19 are arranged in the relatively little both sides of ellipse arc; The center of circle of ring shaped sprocket assembly moves down postposition with respect to crank shaft 2 and crank central siphon, and supports that with the sprocket wheel that is sleeved on the bicycle crossbeam lower adaptor pipe 1 casing rack 3 is connected and fixed; The right top of crank shaft 2 is set with right crank 13, and its inboard is fixed with passive short crank 22, and right crank 13 and passive short crank 22 all are provided with chute a side, and the left end of crank shaft 2 is equipped with left crank 15.
Purpose of the present invention can also reach by following measure:
Ring shaped sprocket assembly and crank and crank shaft 2 splits, and design the interior radius of circle that has more than 2 centimetres, the relative crank shaft of its radius center of turn axle center moves down more than 0.1 centimetre, and is rearmounted more than 0.1 centimetre.
Two transmission pins 9,19 all are equipped with large-diameter roller bearing 11,21, little antifriction-bearing box 12,23.
Large-diameter roller bearing 11,21, little antifriction-bearing box 12,23 respectively with the face that concaves 30,32 of passive short crank 22, right crank 13 sides, rolling cell wall 29,34 rolling touch.
Passive short crank 22 and left crank 15 interlocks, its installation towards all consistent, with 13 one-tenth 180 ° of configurations of right crank with left crank 15 with angle.
Fig. 1 is structure right elevation A of the present invention.
Fig. 2 is structure right elevation B of the present invention.
Fig. 3 is a structure top plan view of the present invention.
Fig. 4 is the moment balance scheme drawing of existing bicycle crank chain-wheel mechanism.
Fig. 5 is the moment balance scheme drawing of crank and chain-wheel mechanism of the present invention.
The present invention is further detailed in conjunction with the accompanying drawings below:
The crank and chain-wheel mechanism of this high output performance is the inboard that passive short crank 22 is fixed on crank shaft 2 right-hand members by fixing pin 24; Right crank 13 is sleeved on the outside of the passive short crank 22 of crank shaft 2 right-hand members and by fastening nut 14 tightenings, it can rotate with respect to crank shaft 2.Crank shaft 2 is installed in the bicycle crossbeam lower adaptor pipe 1, has ball bearing of main shaft 17 to cooperate, and 4 tightenings of bowl cap are arranged.The oval fluted disc 7 of sprocket wheel becomes 180 ° in the relatively little both sides of its ellipse arc and locates to be equipped with transmission pin 9 and 19, by tightening nut 10 and 20 tightenings.Two transmission pins 9 and 19 right-hand member all are equipped with large-diameter roller bearing 11,21, little antifriction-bearing box 12,23, and hold- doun nut 25,26 tightenings are arranged.Concave face 30, rolling cell wall 29 of the large and small antifriction-bearing box 11,12 of transmission pin 9 and right crank 13 sides is rolling touch; Concave face 32, rolling cell wall 34 of the large and small antifriction-bearing box 21,23 of transmission pin 9 and passive short crank 22 is rolling touch.Have its oval fluted disc 7 of ring shaped sprocket assembly of oval fluted disc to constitute one by bearing 8 and ring shaped sprocket seat 6, ring shaped sprocket seat 6 designs of sprocket wheel have the above interior radius of circle of 2cm, and its center of circle moves down more than the 0.1cm with respect to crank shaft 2, more than the rearmounted 0.1cm.Whole sprocket wheel relies on fixed mount 28 to be fastened on sprocket wheel by tightening screw 5,18 and supports on the casing rack 3.Sprocket wheel supports 3 of casing racks to be fixed on the bicycle crossbeam lower adaptor pipe 1 by tightening nut 16.
When riding, left crank 15 presses down and drives crank shaft 2, and the passive short crank 22 that is fixed on crank shaft 2 right-hand member inboards is along with the rotation of crank shaft 2 presses down transmission pin 19 and large and small antifriction-bearing box 21,23 thereof, thereby the oval fluted disc of drive sprocket 7 rotates.Because the ring shaped sprocket assembly that oval fluted disc is arranged is with respect to crank shaft 2 biasings, then crank shaft 2 is positioned at the preceding upper limb of sprocket wheel circle, be 0 °～90 ° phase regions of the residing vertical line in the relative sprocket wheel center of circle, the formed resistance arm of oval fluted disc 7 maximum radiuss that can make the crank and chain-wheel mechanism middle sprocket like this turns to 0 °～90 ° these the bests at crank and exerts oneself that appropriateness shortens in the angular area, thereby both increased effective torque, do not reduce the speed of a motor vehicle again, reach the purpose that improves footstalk chain-wheel mechanism output performance by a relatively large margin.
Existing bicycle crank chain-wheel mechanism, when scrunching its crank of power effect, its moment balance such as Fig. 4 illustrate; The high output performance crank and chain-wheel mechanism, when scrunching its crank of power effect, its moment balance such as Fig. 5 illustrate.Can find out from two figure contrast, owing to move the preposition O ' position of arriving on the crank shaft fulcrum O off-centre, shorten to r ' simultaneously among Fig. 4 with respect to O ' sprocket radius r.Fig. 5 compares with Fig. 4, R '=R wherein, F '
1=F
1, r '＜r, F '
2＞F
2
Table 1 is high output performance crank and chain-wheel mechanism output efficiency and sprocket wheel offset, crank length variations mapping table, by the table in as can be seen, the value of sprocket wheel biasing is big more, mechanism's output efficiency value is just high more, and crank length increase and decrease is to the influence of output efficiency value, than the influence in the sprocket wheel biasing significantly little.
The present invention has following advantage compared to existing technology:
Bicycle high output performance crank and chain-wheel mechanism is owing to adopting sprocket wheel and crank split, sprocket wheel With respect to the new design of crank axle biasing and Elliptic chain wheel fluted disc, thereby improving on the output performance Realized new breakthrough, its design is new, practical, can make more Quick labor-saving of cycling.
This design also can advance to draw the improvement of I. C. engine crankshaft linkage, also has to improve its output The possibility of performance.
Delivery efficiency and sprocket wheel offset, crank length change mapping table
Table 1
Claims (5)
1. the crank and chain-wheel mechanism of a high output performance, it is made up of crank, crank shaft, sprocket wheel, the circle type seat (6) that it is characterized in that the built-in bearing of 2 centimetres of the interior radius of circles of oval fluted disc (7) constitutes the ring shaped sprocket assembly, and oval fluted disc (7) becomes 180 ° of fixed angle that two transmission pins (9) and (19) are arranged in the relatively little both sides of ellipse arc; The center of circle of ring shaped sprocket assembly moves down postposition with respect to crank shaft (2) and crank central siphon, and supports casing rack (3) to be connected and fixed with the sprocket wheel that is sleeved on the bicycle crossbeam lower adaptor pipe (1); The right top of crank shaft (2) is set with right crank (13), and its inboard is fixed with passive short crank (22), and right crank (13) and passive short crank (22) all are provided with chute a side, and the left end of crank shaft (2) is equipped with left crank (15).
2. crank and chain-wheel mechanism according to claim 1, it is characterized in that ring shaped sprocket assembly and crank and crank shaft (2) split, and design has the interior radius of circle more than 2 centimetres, and the relative crank shaft of its radius center of turn axle center moves down more than 0.1 centimetre, and is rearmounted more than 0.1 centimetre.
3. crank and chain-wheel mechanism according to claim 1 is characterized in that two transmission pins (9), (19) all are equipped with large-diameter roller bearing (11), (21), little antifriction-bearing box (12), (23).
4. crank and chain-wheel mechanism according to claim 3, it is characterized in that large-diameter roller bearing (11), (21), little antifriction-bearing box (12), (23) respectively with the face that concaves (30), (32) of passive short crank (22), right crank (13) side, rolling cell wall (29), (34) rolling touch.
5. crank and chain-wheel mechanism according to claim 1 is characterized in that the interlock of passive short crank (22) and left crank (15), its installation towards all consistent with left crank (15) with angle, become 180 ° of configurations with right crank (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96116844 CN1135992A (en) | 1996-02-14 | 1996-02-14 | Crank and chain-wheel mechanism with high output performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96116844 CN1135992A (en) | 1996-02-14 | 1996-02-14 | Crank and chain-wheel mechanism with high output performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1135992A true CN1135992A (en) | 1996-11-20 |
Family
ID=5123800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96116844 Pending CN1135992A (en) | 1996-02-14 | 1996-02-14 | Crank and chain-wheel mechanism with high output performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1135992A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086658C (en) * | 1997-05-23 | 2002-06-26 | 张役国 | Self-adapted type bottom bracket bearing stepless gear-change |
| WO2013104663A1 (en) * | 2012-01-11 | 2013-07-18 | Rotor Componentes Tecnológicos S.L | Crank arm spider improvement for attaching ovoid chainrings |
| 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 |
| CN108820117A (en) * | 2018-08-27 | 2018-11-16 | 佛山市梦真营机电有限公司 | A kind of bicycle energy storage sprocket wheel |
-
1996
- 1996-02-14 CN CN 96116844 patent/CN1135992A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086658C (en) * | 1997-05-23 | 2002-06-26 | 张役国 | Self-adapted type bottom bracket bearing stepless gear-change |
| WO2013104663A1 (en) * | 2012-01-11 | 2013-07-18 | Rotor Componentes Tecnológicos S.L | Crank arm spider improvement for attaching ovoid chainrings |
| 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 |
| CN108820117A (en) * | 2018-08-27 | 2018-11-16 | 佛山市梦真营机电有限公司 | A kind of bicycle energy storage sprocket wheel |
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| PB01 | Publication | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |