CN202379044U - Telescopic labor-saving crank mechanism for bicycle - Google Patents
Telescopic labor-saving crank mechanism for bicycle Download PDFInfo
- Publication number
- CN202379044U CN202379044U CN2011205104511U CN201120510451U CN202379044U CN 202379044 U CN202379044 U CN 202379044U CN 2011205104511 U CN2011205104511 U CN 2011205104511U CN 201120510451 U CN201120510451 U CN 201120510451U CN 202379044 U CN202379044 U CN 202379044U
- Authority
- CN
- China
- Prior art keywords
- crank
- slide way
- slideway
- pulley
- bicycle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Motorcycle And Bicycle Frame (AREA)
Abstract
The utility model discloses a telescopic labor-saving crank mechanism for a bicycle. The telescopic labor-saving crank mechanism has the structure that: a middle shaft passes through the center of a chain disc and is fixed; the middle shaft passes through an eccentric part of a concentric circle slide way disc; a crank slide way is arranged on the end part of the middle shaft; the back of a crank is provided with a crank pulley; the crank is inserted into the crank slide way; the crank pulley is embedded in the slide way of the concentric circle slide way disc; when the top end of the crank gradually moves to the front space, the pulley moves in the slide way of the concentric circle slide way disc to drive the crank to slide in the crank slide way, the crank gradually extends to the greatest length on the original basis, the length of the crank is increased and the labor of a human body is saved; when the top end of the crank gradually moves to the rear space, the crank gradually reduced to the shortest length, the space from the ground is increased, and the legs of the human body can freely move; and in the entire process, the sizes of the chain disc and a flywheel are unchanged, so that the speed is unchanged under a relatively power saving condition. The crank mechanism can be used for various rickshaws with foot drive as power.
Description
Technical field
The utility model relates to a kind of bicycle and uses crank mechanism, and especially a kind of laborsaving telescoping bicycle is used crank mechanism.
Background technology
At present existing bicycle mode of motion is through the downward application of force of human body pin, and the stressed motion of crank drives chain drum simultaneously, through chain gear to flywheel, the stressed motion drive of flywheel wheel rim.Long more with respect to crank length; Operation is got up laborsaving more; Thereby thereby people improve lengthening crank length generation labor-saving effect; But crossing ability is relatively poor when having overhead hypotelorism through rugged road surface, and human body shank and ankle can not move freely during crank motion to axis rear side, very easily cause human-body fatigue; The existing novel invention technology of other exists makes complicacy, uses inconvenient shortcoming.
Summary of the invention
In order to overcome shortcoming and the inconvenient drawback of existing novel invention use that present bicycle crank lengthening is produced; The utility model provides the bicycle telescoping laborsaving crank; This crank can stretch out lengthening when the driver under stress chain drum; Bigger power is provided, when stressing the driving chain drum, can shrink back original size again simultaneously, guaranteed the ground Clearance; Legs and feet portion can be moved freely; And make simple, easy to use.
The utility model solves the technical scheme that its technical matters adopted: a kind of bicycle is with scalable laborsaving crank mechanism; This mechanism comprises crank, crank slideway, crank pulley, concentric circles slideway dish, chain drum, axis, and the chain drum center is through axis, and concentric circles slideway dish eccentric part passes through axis; The crank slideway is installed in middle shaft end; The mounting crank pulley at the crank back side, crank inserts the crank slideway, and crank pulley is embedded in the concentric circles slideway dish slideway.When human leg foot during to the crank application of force chain drum be circular movement, left foot is preceding, right crus of diaphragm after; Otherwise also and, adopt the scalable laborsaving crank mechanism of the utility model, when the crank top moves to when being 90 ° of angles of conter clockwise with the axis perpendicular line gradually; Crank pulley moves along concentric circles slideway dish slideway, drives crank simultaneously, and crank is slided in the crank slideway; On original basis, extend the longest gradually; Crank length increases, and human body is laborsaving, when the crank top moves to when being 270 ° of angles of conter clockwise with the axis perpendicular line gradually; The shortest (the angle on-fixed of the maxim of crank length and minimum value and axis perpendicular line is constant, can change concentric circles slideway dish setting angle according to actual conditions and change by being tapered to for crank.), it is big that liftoff spacing becomes, and human leg foot can move freely, and in whole process, chain drum and flywheel size all change, and therefore the speed of a motor vehicle is constant under the situation of relative labour-saving.
The beneficial effect of the utility model is: make the people of the bicycle of riding laborsaving; The comfort level at legs and feet position and guarantee overhead spacing in keeping riding.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Accompanying drawing is the schematic perspective view of the utility model bicycle with scalable laborsaving crank mechanism.
1. cranks among the figure, 2. crank slideway.3. crank pulley, 4. concentric circles slides into dish, 5. chain drum.6. axis.
The specific embodiment
In the drawings; Chain drum 5 centers are through axis 6 and fixing; Concentric circles slideway dish 4 eccentric parts are through axis 6, and specifically the position through concentric circles slideway dish determines that according to the telescopic length of crank crank slideway 2 is fixedly mounted on axis 6 ends; Crank 1 inserts in the crank slideway 2, and crank pulley 3 is installed in crank 1 back side correct position.
The utility model bicycle is following with the working process of scalable laborsaving crank mechanism:
When both feet are set foot on the motion of crank drive chain drum; The crank pulley that is installed in the crank back side is also followed crank and in the concentric circles slideway, is rolled, because concentric circles slideway dish is not concentric with axis, crank pulley is oval Zhou Yundong around axis; And the crank slideway is fixedly mounted on middle shaft end; So crank can be done fore and aft motion in the crank slideway, thereby produce the effect that the Shen is long and shrink, to reach laborsaving; Avoid simultaneously too small again with the ground interplanar distance.
It is various with on the foot-operated rickshaw as power that the utility model bicycle uses scalable laborsaving crank mechanism can be used for.
Claims (4)
1. a bicycle is with scalable laborsaving crank mechanism; Comprise in this mechanism: crank, crank slideway, crank pulley, concentric circles slideway dish, chain drum, axis is characterized in that: the chain drum center is through axis, and concentric circles slideway dish eccentric part passes through axis; The crank slideway is installed in middle shaft end; The mounting crank pulley at the crank back side, crank inserts the crank slideway, and crank pulley is embedded in the concentric circles slideway dish slideway.
According to the bicycle described in the claim 1 with scalable laborsaving crank mechanism, it is characterized in that: concentric circles slideway dish is the length that sets crank for extension through the position of axis and the distance in the concentric circles slideway dish center of circle in said.
According to the bicycle described in the claim 1 with scalable laborsaving crank mechanism, it is characterized in that: crank is done fore and aft motion in the crank slideway in said.
According to the bicycle described in the claim 1 with scalable laborsaving crank mechanism, it is characterized in that: crank pulley moves in a circle in concentric circles in said.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205104511U CN202379044U (en) | 2011-12-09 | 2011-12-09 | Telescopic labor-saving crank mechanism for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205104511U CN202379044U (en) | 2011-12-09 | 2011-12-09 | Telescopic labor-saving crank mechanism for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202379044U true CN202379044U (en) | 2012-08-15 |
Family
ID=46627562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205104511U Expired - Fee Related CN202379044U (en) | 2011-12-09 | 2011-12-09 | Telescopic labor-saving crank mechanism for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202379044U (en) |
-
2011
- 2011-12-09 CN CN2011205104511U patent/CN202379044U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20141209 |
|
| EXPY | Termination of patent right or utility model |