CN102358390A - Automatic telescopic crank of bicycle - Google Patents
Automatic telescopic crank of bicycle Download PDFInfo
- Publication number
- CN102358390A CN102358390A CN2011102224963A CN201110222496A CN102358390A CN 102358390 A CN102358390 A CN 102358390A CN 2011102224963 A CN2011102224963 A CN 2011102224963A CN 201110222496 A CN201110222496 A CN 201110222496A CN 102358390 A CN102358390 A CN 102358390A
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- Prior art keywords
- crank
- people
- control panel
- bicycle
- control
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Abstract
The invention discloses a device capable of automatically changing the length of a crank according to the effectiveness of a force applied by a bicyclist. An automatic telescopic crank of a bicycle mainly comprises a front arm, a back arm and a control disc which are mutually nested; the other end of the front arm is connected with a pedal; the other end of the back arm is connected with a center shaft; under the action of the control disc, the front arm of the crank stretches or retracts in a reciprocating way along with rotation, so that the maximum efficiency of manpower is achieved, the motional distance of a foot when a force is not applied is reduced, and the fatigue of a person is reduced.
Description
Technical field
The present invention relates to the crank device in a kind of bicycle middle shaft part, especially it can be according to cyclist's the validity of exerting oneself and changes the device of crank length automatically.
Background technology
Since bicycle was invented from it, the length of its Middle axle crank parts always was fixing.The ratio that is length and the chain wheel radius of sprocket wheel of crank is certain, and this ratiometric size is determining the height of bicycle labor saving effect.
But, this design, it is the perimeter of a circle of radius that the distance that people's pin is passed by equals with pedal crank length, is that representative type uses the method for lengthening moment to realize the labour-saving.By bike the time, people's easy fatigue does not meet natural most of mode of motion yet for a long time.Because this just round mode of motion is rarely found at realm of nature, and in most cases, natural object of which movement mode is ellipse or irregular cycle etc.
Summary of the invention
For the crank that changes existing bicycle improves usefulness with the duration degree unmodified situation of not exerting oneself firmly the time; The present invention provides a kind of retractable crank; This crank can be elongated gradually when the people exerts oneself to pedal,, the people shortens when not exerting oneself, thus the maximum efficiency of performance manpower; Reduce the move distance when not exerting oneself, alleviate people's fatigue.
The technical solution adopted for the present invention to solve the technical problems is: the crank of bicycle is divided into front and back two parts; Nested against one another being in the same place of these two parts (forearm and postbrachium); Forearm can freely stretch out or withdraw, thus the length variations that realizes crank with freely stretch; In addition on adding on the middle shaft housing of bicycle one control disk; The control slit that a circle or irregular cycle are arranged on the control disk; One end of the small-sized transverse axis on the forearm passes the dead slot of crank postbrachium, inserts in the control slit, can be used for controlling the telescopic level of crank like this; Thereby the forearm that makes crank elongates or shortens with rotation under the effect of control slit again and again.
The invention has the beneficial effects as follows, can increase the validity that the people exerts oneself, meet natural motion rule, alleviate people's fatigue, simple and practical.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is the forearm figure of crank of the present invention.
Fig. 2 is the postbrachium figure of crank of the present invention.
Fig. 3 is control panel figure of the present invention.
Fig. 4 is composite construction figure of the present invention.
The specific embodiment
One end of the crank postbrachium of bicycle of the present invention links to each other with axis, and there is a rectangular dead slot centre of remainder.One end of crank forearm links to each other with pedal, at the other end a small-sized transverse axis is arranged, and an end of small-sized transverse axis passes the dead slot of crank postbrachium, inserts in the circular control slit on the control panel.Control panel is fixed on the shell of axis, and the center of circle of control panel is positioned at top 30 degree of the horizontal surface of axis, about 120 millimeters.When people's pedal car, the forearm of crank elongates or shortens with rotating under the effect of control slit again and again like this at the place.Promptly when pedal be positioned at axis horizontal surface above 30 when spending, crank is the longest, shortens gradually subsequently; The shortest when it moves to the axis rear portion, gradually change again subsequently.So just form, when the people exerted oneself to pedal, crank extended gradually; When the people did not exert oneself, crank shortened gradually, thereby gives full play to the validity that the people exerts oneself, and shortens the travel of pin, alleviates people's fatigue.
Claims (4)
1. the validity that can exert oneself according to the cyclist and change the device of crank length automatically; It is characterized in that: a kind of retractable crank is provided; This crank can be elongated gradually when the people exerts oneself to pedal,, the people shortens when not exerting oneself, thus the maximum efficiency of performance manpower; Reduce the move distance of people's pin when not exerting oneself, alleviate people's fatigue.
2. the control panel in the automatic retractable crank device of bicycle according to claim 1; It is characterized in that: the crank of bicycle is divided into front and back two parts; These two parts are together nested against one another, and first half can freely stretch, thus the length variations that realizes crank with freely stretch.
3. the control panel in the automatic retractable crank device of bicycle according to claim 1, it is characterized in that: control panel is rounded, and circle or irregular cycle control slit are arranged on it; In order to stretching of control forearm, control panel is fixed on the shell of axis, and the center of circle of control panel is positioned at top 30 degree of the horizontal surface of axis; About 120 millimeters places, like this, when people's pedal car; The forearm of crank elongates or shortens with rotation under the effect of control slit again and again.
4. the control slit on the control panel in the automatic retractable crank device of bicycle according to claim 1 is characterized in that: its shape is circle or ellipse or irregular cycle and other shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102224963A CN102358390A (en) | 2011-08-04 | 2011-08-04 | Automatic telescopic crank of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102224963A CN102358390A (en) | 2011-08-04 | 2011-08-04 | Automatic telescopic crank of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102358390A true CN102358390A (en) | 2012-02-22 |
Family
ID=45583786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102224963A Pending CN102358390A (en) | 2011-08-04 | 2011-08-04 | Automatic telescopic crank of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102358390A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4125239A (en) * | 1976-06-28 | 1978-11-14 | Berclaz Rene Louis | Pedal mechanism |
| CN2035731U (en) * | 1988-07-02 | 1989-04-12 | 成都飞机公司 | Main-shaft assembly of man drawn vehicle |
| CN2157125Y (en) * | 1992-12-09 | 1994-02-23 | 徐荣祥 | High-efficiency pedal for bicycle |
| CN2239930Y (en) * | 1995-10-17 | 1996-11-13 | 郑瑞滨 | Labour-saving device for bicycle |
| WO2001021473A1 (en) * | 1999-09-21 | 2001-03-29 | Length varying device for pedal arms of bicycle | |
| CN2618849Y (en) * | 2003-04-17 | 2004-06-02 | 郭林虎 | Telescopic pedal |
| WO2008012521A1 (en) * | 2006-07-26 | 2008-01-31 | Andrew James Smith | Bicycle pedal crank drive unit |
-
2011
- 2011-08-04 CN CN2011102224963A patent/CN102358390A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4125239A (en) * | 1976-06-28 | 1978-11-14 | Berclaz Rene Louis | Pedal mechanism |
| CN2035731U (en) * | 1988-07-02 | 1989-04-12 | 成都飞机公司 | Main-shaft assembly of man drawn vehicle |
| CN2157125Y (en) * | 1992-12-09 | 1994-02-23 | 徐荣祥 | High-efficiency pedal for bicycle |
| CN2239930Y (en) * | 1995-10-17 | 1996-11-13 | 郑瑞滨 | Labour-saving device for bicycle |
| WO2001021473A1 (en) * | 1999-09-21 | 2001-03-29 | Length varying device for pedal arms of bicycle | |
| CN2618849Y (en) * | 2003-04-17 | 2004-06-02 | 郭林虎 | Telescopic pedal |
| WO2008012521A1 (en) * | 2006-07-26 | 2008-01-31 | Andrew James Smith | Bicycle pedal crank drive unit |
| WO2008012521B1 (en) * | 2006-07-26 | 2008-03-13 | Andrew James Smith | Bicycle pedal crank drive unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Xu Ke Document name: the First Notification of an Office Action |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120222 |