CN2086237U - Bicycle power-saving pedal crank - Google Patents
Bicycle power-saving pedal crank Download PDFInfo
- Publication number
- CN2086237U CN2086237U CN 90224366 CN90224366U CN2086237U CN 2086237 U CN2086237 U CN 2086237U CN 90224366 CN90224366 CN 90224366 CN 90224366 U CN90224366 U CN 90224366U CN 2086237 U CN2086237 U CN 2086237U
- Authority
- CN
- China
- Prior art keywords
- crank
- pedal
- bicycle
- force
- saving
- 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.)
- Withdrawn
Links
Abstract
The utility model relates to a bicycle power-saving pedal crank, which belongs to one part of a pedal of a bicycle. The existing pedal crank is a shorter strip-shaped iron handle, so the relatively larger strength is needed when a person pedals the bicycle. The bicycle power-saving pedal crank divides the strip-shaped crank into an extending crank and a fixed crank to enable some parts to be sheathed together and be connected by a tension spring, and mutual limiting (positioning) structures are arranged on the two cranks. Therefore, the component force (pulling force) generated by the large strength needed by riding along the crank direction can overcome the spring force to cause the crank to automatically extend, which cause the force arm to be enlarged to obtain the purposes of labor saving and ensure the stretching of the crank to adapt to people's riding movement.
Description
The present invention relates to a kind of bicycle pedal crank.
Existing bicycle pedal crank is a strip-form iron handle.Because restriction that can not be long when length is moved by human body to pedal, it is suitably short to have to during design, thereby correspondingly makes the people need apply bigger power (arm of force and application force are inversely proportional to) when overcoming car resistance.
The objective of the invention is to design a kind of bicycle labor saving pedal crank, make this crank can be fit to people's moving situation to pedal, thus again can be when need apply big power the pedal crank can extend the arm of force that makes application force automatically and increase and reach the labour-saving purpose.
Bicycle labor saving pedal crank mainly is made up of fixed crank and elongation crank two parts, and two crank section suits link together by a spring, is respectively equipped with mutual limit (deciding) bit architecture (as locating dowel pin and hole) on fixed crank and elongation crank.Do not stressing and only be subjected under the less power effect situation, these two parts of crank keep total length consistent with the full-length (being initial length) of bicycle under the effect of initial tension of spring and location structure location.When people in the bicycle running imposed a determined power to pedal, this power can overcome spring force and outwards elongation to pedal crank force of labor stretching action along the component (pulling force) of crank direction, thereby the pedal arm of force is increased.
The invention has the advantages that: one, the pedal crank can extend and the power arm that extended automatically when needs overcome big car resistance (as going up a slope or load-carrying etc.) or need in addition big power to pedal, thereby makes the corresponding minimizing of the power of pedaling (or having strengthened kinetic moment); Two, in less firmly driving (as level road etc.) and the occasion (as the foot-operated nadir and latter half of that moves to of pedal) that need avoid the crank elongation, it is constant substantially to guarantee that again crank remains on original length, thereby has adapted to the situation to pedal of human body; Three, this element structure is simpler, and is easy to manufacture, and cost is low, and need not the bicycle other parts are changed, and is easy to promote the use of.
Accompanying drawing is a structural representation of the present invention.Below in conjunction with accompanying drawing concrete enforcement of the present invention is described further.Whole pedal crank can be by extending crank (1), fixed crank (2), tension spring (3) and locating dowel pin (4), forming.
1, elongation crank.The consistent half garden shape homalocephalus that adopts with existing bicycle in its outer end has tapped bore above to link with foot-operated, and the other end then is socketed on the fixed crank, is provided with 1-2 pin-and-hole above so that the attaching locating dowel pin.
2, fixed crank.Head (another outer end) also adopts half garden homalocephalus with first the causing of existing bicycle crank, on have the hole, garden to connect and to have in vertical direction the keyhole of carving of captive joint axis effect with the car axis, the other end is the tubular or square tube shape in garden, the symmetrical both sides of pipe have microscler cotter way, the elongation of determining when its length depends on design, elongation crank and fixed crank all adopt cast iron or steel.
3, tension spring.The two ends of spring articulate mutually with the inner of elongation crank and the inner end in the fixed crank pipe respectively.
4, locating dowel pin tightly fits on the elongation crank pin hole.
Claims (5)
1, a kind of bicycle pedal crank is characterized in that crank is divided into elongation crank and fixed crank two parts.
2, pedal crank according to claim 1 is characterized in that extending crank and is sleeved on the fixed crank.
3, pedal crank according to claim 1 is characterized in that extending and has tension spring to connect between crank and the fixed crank.
4, pedal crank according to claim 1 is characterized in that extending and is respectively equipped with limit (deciding) position pin and limit (decide) slotted hole on crank and the fixed crank.
5, pedal crank according to claim 1, it is characterized in that extending its suit part of crank and fixed crank can be garden shape or square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90224366 CN2086237U (en) | 1990-11-23 | 1990-11-23 | Bicycle power-saving pedal crank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90224366 CN2086237U (en) | 1990-11-23 | 1990-11-23 | Bicycle power-saving pedal crank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2086237U true CN2086237U (en) | 1991-10-09 |
Family
ID=4901953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90224366 Withdrawn CN2086237U (en) | 1990-11-23 | 1990-11-23 | Bicycle power-saving pedal crank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2086237U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102745295A (en) * | 2012-07-13 | 2012-10-24 | 何心田 | Large torque bicycle |
| CN102951245A (en) * | 2011-08-24 | 2013-03-06 | 王越 | Bicycle booster |
| CN105813936A (en) * | 2014-02-28 | 2016-07-27 | 艾伦·约翰·罗宾森 | A cycling aid |
-
1990
- 1990-11-23 CN CN 90224366 patent/CN2086237U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102951245A (en) * | 2011-08-24 | 2013-03-06 | 王越 | Bicycle booster |
| CN102745295A (en) * | 2012-07-13 | 2012-10-24 | 何心田 | Large torque bicycle |
| CN102745295B (en) * | 2012-07-13 | 2014-03-12 | 何心田 | Large torque bicycle |
| CN105813936A (en) * | 2014-02-28 | 2016-07-27 | 艾伦·约翰·罗宾森 | A cycling aid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |