CN86207304U - Axial speed variator particularly for bicycle - Google Patents
Axial speed variator particularly for bicycle Download PDFInfo
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- CN86207304U CN86207304U CN 86207304 CN86207304U CN86207304U CN 86207304 U CN86207304 U CN 86207304U CN 86207304 CN86207304 CN 86207304 CN 86207304 U CN86207304 U CN 86207304U CN 86207304 U CN86207304 U CN 86207304U
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- speed
- flywheel
- bicycle
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- ratchet
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Abstract
The utility model discloses a shaft speed changer particularly for a bicycle. The utility model belongs to the shaft speed changer, in particular to the speed changer of the ratchet wheel and the ratchet pawl for the bicycle, which adopts the simultaneous driving of the transmission mechanism with two sets of different transmitting ratios. Through that a steering system can control the operating status of the ratchet pawl of the high-speed flywheel on a driven shaft, the speed changing purpose can be obtained, and the speed changing principle is simple. The utility model has the advantages of firm structure, high reliability, and less fittings; the speed changer of the ratchet wheel and the ratchet pawl for the bicycle is especially suitable for the conditions that the bicycle bears the heavy load, the pavement is the ramp; the speed changing control is simple; the speed changer of the ratchet wheel and the ratchet pawl for the bicycle is not only suitable for the production of the new bicycle, but also is suitable for the modification of the used bicycle, and the speed changer of the ratchet wheel and the ratchet pawl for the bicycle is an important communication and transportation tool for a town, in particular to a countryside.
Description
The invention relates to shaft transmission, especially for the click transmission system of bicycle.
Existing axle transmission system, transmission system especially for bicycle, although different on the version, its cardinal principle all is to adopt the internal speed-changing of sun and planet gear and adopt multiple tooth sprocket wheel with double-deck chain structure to reach speed change purpose two class forms by four-bar mechanism control.
Three flew speed varying back shaft in inner speed change bicycle commonly used adopted, have fast, in, third gear at a slow speed, gear shifting operation realizes by controlling manual three grades of location transmission systems (before, during and after third gear).
Outer variable speed bicycle adopts outer five of multi-gear sheet to fly and double-deck double-stranded wheel, reaches the effect that changes transmitting ratio speed by controlling manual stepless location transmission system.
After chain is transferred to another flywheel sheet and during with gear mesh, requiring to pull gear change hand lever need exert oneself gradually, must guard against overexerting from a flywheel sheet, need be treated that chain and gear mesh fully, the fast running of can exerting oneself.Cause chain between sprocket wheel and flywheel, not remain on linear position easily, occur to jump chain, the chain bad phenomenons of engagement such as phenomenon of box-uping.
Interior three fast rear axles also often produce each grade and skid, fluctuate, the shift feel sluggishness, and axle housing rotates ineffective, and phenomenons such as stagnant are drawn, are hung in step.
Said apparatus speed changing structure principle complexity, rotational parts is more, and the manipulation inconvenience of speed change damages easily, can not bear heavy duty, and the maintenance amount is big, the cost height.(" bicycle science and technology " 1980, № 5 P 13-21, national bicycle industrial technology information station publishes)
The saxophone of Germany (Sachs) company is combined into a cover ten fast transmission systems to the outer speed change of the internal speed-changing of second gear and five grades, and it is used for racing car or sporting car.(Germany " bicycle market " 1980, № 1), its complex structure, cost height.
Patent documentation CN GG 85202575 discloses a kind of " bicycle of two very heavy flywheels and employing flywheel multi-speed " (utility model patent communique Vo 12 № 17 P10).
CN GK 85104296 discloses a kind of " two-person treading bicycle with concentric axles " (Gazette of Patent for Invention Vo 12 № 5 P21).
CN GK 85105841 discloses a kind of " bicycle speed-varying unit " (Gazette of Patent for Invention Vo 12 № 9 P19).
All there is complex structure in foregoing invention, can not bear shortcomings such as heavy duty.
It is simple to the purpose of this invention is to provide a kind of transmission principle, and structure is firm, can bear heavy duty, maneuverable axle transmission system, and in particular for the click transmission system of bicycle (comprising three-wheel vehicle), cost is low, is suitable for new old vehicle.
Principle of the present invention is: drive at axle drive shaft and quilt and adopt the different drive disk assembly of two cover transmitting ratios on the axle, have high-speed driving to take turns and the driven at low speed wheel on the axle drive shaft.Being driven on the axle has high speed flywheel and low-speed flywheel, and flywheel is all established ratchet ratchet mechanism.Between high-speed driving wheel and the high speed flywheel and between driven at low speed wheel and the low-speed flywheel independently driving band is arranged respectively, the ratchet of variable speed control maneuvering system and flywheel is joined, and by the control to high speed flywheel ratchet mode of operation, reaches the purpose of speed change.
Drive wheel can adopt sprocket wheel, and driving band adopts chain, and the sprocket wheel that is used for bicycle can be separately fixed at axis, and flywheel is fixed on the rear axle.Low speed sprocket wheel and high speed sprocket wheel preferably are separately fixed on the left and right crank of axis, and low-speed flywheel and high speed flywheel are contained in the left and right end of rear axle (promptly being driven axle) body respectively.
The ratchet Control arm of variable speed control maneuvering system and high speed flywheel joins, and promptly meshes or jump out of mesh is controlled by the mode of operation to the high speed flywheel ratchet.When the ratchet engaged of the ratchet of high speed flywheel and high speed flywheel, high speed flywheel is driven, and promptly driven axle is in fast state, at this moment, and low-speed flywheel idle running.When the ratchet jump out of mesh of the ratchet of high speed flywheel and high speed flywheel, high speed flywheel idle running, low-speed flywheel is driven, and promptly driven axle is in lower-speed state, reaches the purpose of speed change thus.The general pair detent mechanisms that adopt.
The variable speed control maneuvering system comprises control part and actuating element.Wherein control part comprises ratchet control stalk, ratchet control stalk spring, control rotating disk and mounting ring.The ratchet control stalk links to each other with the pawl control arm of high speed flywheel, to control the mode of operation of this ratchet.When becoming low speed by high speed, ratchet control stalk spring utilizes its elastic force that ratchet is separated from the high speed operation state, recovers former lower-speed state.The control rotating disk divides inner ring and outer ring, and inner ring is fixed on the high speed flywheel, and its effect is to guarantee that the control rotating disk has definite position on high speed flywheel, so that precise control, reliable.When the mode of operation end of conversion, with regard to utilizing the friction force between this inner ring and the mounting ring it is rotated synchronously with high speed flywheel, make the ratchet of high speed flywheel keep fixed mode of operation.The equal recessing in inner ring and outer ring for this reason, groove are positioned at ratchet control stalk place, guarantee the control of the controlled rotating disk of ratchet.Block is arranged on the outer ring, and general block has two (being separated by 90 °), also can four (being separated by 90 °).Block turns over 90 ° or 270 ° in the speed change switching process.Mounting ring is fixed on the high speed flywheel, and cam is arranged on the mounting ring, and when the block of controlling the rotating disk outer ring usually was two, cam was one; If there are four blocks control rotating disk outer ring, then cam is two.The main effect of mounting ring is to guarantee that the control rotating disk turns over certain angle, so that change the mode of operation of high speed flywheel, in addition, also the control rotating disk is shielded.
Low-speed flywheel can adopt the suitable freewheel of the number of teeth.
Actuating element can be shell type or hand-pulling or foot-operated etc.It can comprise parts such as driving lever, rocking lever, arm-tie, extension spring, backguy and gearshift knob.The position of driving lever coincide with the block of control rotating disk, and the position of control arm-tie promptly can change the initialization state of rocking lever.Gearshift knob can be installed in handlebar or vehicle frame etc. and locate, and realizes the speed change purpose by manual or foot-propelled.
The different drive disk assembly of two cover transmitting ratios can be selected its transmitting ratio on demand.
Advantage of the present invention is that transmission principle is simple in structure, because of adopting the different fixed type transmission device of two cover transmitting ratios, article two, driving band (chain) is tensioned on two cover speed-changing mechanisms all the time, be bordering on the transfer of energy that straight chain road can guarantee no extra friction, can reduce the mutual friction mutually of chain and sprocket wheel.The control operation of speed change is convenient, needn't ride reversing, and structure is firm, and parts are few, and not fragile accessory can bear heavy duty, is specially adapted to the situation of load cycling transportation.Both be suitable for the design production of new car, be suitable for the used car repacking again.Maintenance, the care work amount is few, and cost is low.Overcome existing axle transmission system especially bicycle speed-varying unit structure, principle complexity, damaged accessory easily, can not bear heavy duty mostly, cost height, shortcomings such as used car repacking difficulty.
Bicycle is as a kind of important traffic in China town and country and transportation means, and especially the rural area needs load-carrying, and foregoing invention will have application prospect preferably.
Accompanying drawing 1: transmission principle figure,
Accompanying drawing 2: high speed flywheel ratchet control principle figure,
Accompanying drawing 3: actuating element schematic diagram.
Wherein (1) is high speed flywheel, and (2) are low-speed flywheel, and (3) are driven axle, (4) be mounting ring, (4-1) be control rotating disk inner ring, (4-2) be control rotating disk outer ring, (4-3) be control rotating disk block, (5) are mounting ring, and (6) are the high speed flywheel ratchet, (7) be the ratchet control stalk, (8) be ratchet control stalk spring, (9) are rocking lever, and (10) are driving lever, (11) be arm-tie, (12), (13) are extension spring.
Following examples will be described further the utility model.
Embodiment 1, is used for the click transmission system of load bicycle, and high speed sprocket wheel and low speed sprocket wheel are separately fixed on the right side of axis, the left crank, and high speed flywheel and low-speed flywheel are contained in the right side, the left end of back axle body respectively.The high speed gear ratio of number of teeth is elected 48:20 as, and the low gear ratio of number of teeth is elected 24:20 as.Driving band ordinary bicycle chain.The pawl control arm of variable speed control maneuvering system and high speed flywheel joins, and adopts two ratchets.There are two blocks the outer ring of control rotating disk, is separated by 90 °, and mounting ring has a cam.Actuating element hand-pulling, gearshift knob are installed on the right side of handlebar, are connected with arm-tie by flexible cord (backguy), and the position that changes arm-tie promptly changes the initial condition drive driving lever action of rocking lever.Driving lever coincide with the block of control rotating disk outer ring.Actuating element can be installed on the chain stay except that gearshift knob and flexible cord.
When rocking lever is in a certain initial condition (high speed or low speed), apply pulling force by gearshift knob and flexible cord, arm-tie is travelled forward, make the block of rocking lever near the control rotating disk, arm-tie stop motion simultaneously, be fixed on a certain position, at this moment rocking lever does not work (clutch) to the control rotating disk, and mounting ring and control rotating disk rotate with flywheel.When the cam of mounting ring is run into rocking lever, rocking lever and arm-tie clutch, arm-tie is moved forward by the tension of flexible cord.Meanwhile, the cam of mounting ring turns over behind the certain angle inoperative to rocking lever, extension spring (13) makes rocking lever recover the state of oneself, at this moment pulling force can thoroughly disappear, the driving lever that the block of control rotating disk is promptly linked to each other with rocking lever blocks, and the control rotating disk stops operating, and waits for that the cam of mounting ring rotates when running into rocking lever once more, the block clutch of rocking lever with the control rotating disk, control rotating disk and mounting ring continue to rotate synchronously.Simultaneously, extension spring (12) restPoses arm-tie, has finished an actuation cycle, waits for next speed change switching process.
General steel of usefulness such as above-mentioned used control rotating disk, mounting ring, arm-tie, rocking lever, driving lever or alloy steel are made.
Claims (5)
1, a kind of transmission system, click transmission system especially for bicycle, include the different drive disk assembly of two cover transmitting ratios, if the flywheel of ratchet and pawl arrangement, the variable speed control maneuvering system, feature of the present invention is that high-speed driving wheel and driven at low speed wheel are arranged on the axle drive shaft, being driven on the axle has high speed flywheel and low-speed flywheel, between high-speed driving wheel and the high speed flywheel and between driven at low speed wheel and the low-speed flywheel independently driving band is arranged respectively, the pawl control arm of variable speed control maneuvering system and high speed flywheel joins.
2, transmission system according to claim 1, it is characterized in that drive wheel can adopt sprocket wheel, driving band adopts chain, the sprocket wheel that is used for bicycle can be separately fixed at axis, flywheel is fixed on the rear axle, low speed sprocket wheel and high speed sprocket wheel preferably are separately fixed on the left and right crank of axis, and low-speed flywheel (2) and high speed flywheel (1) are contained in the left and right end of rear axle (by driving axle 3) body respectively.
3, transmission system according to claim 1 is characterized in that the variable speed control maneuvering system comprises control part and actuating element, and wherein control part comprises ratchet control stalk (7), ratchet control stalk spring (8), control rotating disk (4) and mounting ring; Actuating element comprises driving lever (10), rocking lever (9), arm-tie (11), extension spring (12,13), backguy and gearshift knob.
4, transmission system according to claim 3, it is characterized in that controlling rotating disk and comprise inner ring (4-1) and outer ring (4-2), inner ring is fixed on the high speed flywheel, fluted on ratchet control stalk position, block (4-3) is arranged on the outer ring, general block has two, be separated by 90 °, also available four blocks are separated by 90 °, have groove on the outer ring.
5, transmission system according to claim 3 is characterized in that mounting ring is fixed on the high speed flywheel, and cam is arranged on the mounting ring, and when two blocks were established in control rotating disk outer ring, cam was one, and when four blocks were established in control rotating disk outer ring, cam was two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86207304 CN86207304U (en) | 1986-09-28 | 1986-09-28 | Axial speed variator particularly for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86207304 CN86207304U (en) | 1986-09-28 | 1986-09-28 | Axial speed variator particularly for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86207304U true CN86207304U (en) | 1987-07-22 |
Family
ID=4809762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86207304 Withdrawn CN86207304U (en) | 1986-09-28 | 1986-09-28 | Axial speed variator particularly for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86207304U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103301906A (en) * | 2013-06-27 | 2013-09-18 | 沈阳铝镁设计研究院有限公司 | Method and structure for ensuring synchronization of notch wheels of reciprocating material pulverizing machine |
-
1986
- 1986-09-28 CN CN 86207304 patent/CN86207304U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103301906A (en) * | 2013-06-27 | 2013-09-18 | 沈阳铝镁设计研究院有限公司 | Method and structure for ensuring synchronization of notch wheels of reciprocating material pulverizing machine |
| CN103301906B (en) * | 2013-06-27 | 2016-01-13 | 沈阳铝镁设计研究院有限公司 | A kind ofly ensure the Material disintegrator structure that reciprocating Material disintegrator ratchet is synchronous |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |