CN213139052U - Bending type force-increasing crank - Google Patents
Bending type force-increasing crank Download PDFInfo
- Publication number
- CN213139052U CN213139052U CN202020901402.XU CN202020901402U CN213139052U CN 213139052 U CN213139052 U CN 213139052U CN 202020901402 U CN202020901402 U CN 202020901402U CN 213139052 U CN213139052 U CN 213139052U
- Authority
- CN
- China
- Prior art keywords
- axis
- crank
- shaft hole
- rod section
- arc
- 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
Links
- 238000005452 bending Methods 0.000 title claims description 16
- 230000007704 transition Effects 0.000 claims abstract description 18
- 230000002787 reinforcement Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Steering Devices For Bicycles And Motorcycles (AREA)
Abstract
The utility model discloses crooked formula reinforcement crank includes the crank body, the both ends of crank body set up running-board shaft hole and well shaft hole respectively, the crank body is formed by a pole forward or backward buckling, the crank body includes the circular arc pole section that an organic whole constitutes, circular arc transition pole section, straight pole section, the running-board shaft hole is located the tip of circular arc pole section, well shaft hole is located the tip of straight pole section, the axis of circular arc transition pole section, the axis of straight pole section is located the coplanar, the axis in running-board shaft hole is parallel with the axis in well shaft hole. The utility model discloses crooked formula reinforcement crank, simple structure, it is laborsaving to ride.
Description
Technical Field
The utility model belongs to the bicycle field, concretely relates to bicycle crank.
Background
The crank of the bicycle is a key part of a power system of the bicycle, the existing crank is a straight shank, when the crank runs, a pedal shaft of the crank has two blind points, namely a highest point and a lowest point, in the motion process from the highest point to the lowest point, the torque is sequentially increased from the blind point at the highest point downwards, when the pedal of a person is positioned on the same horizontal line with a central shaft to the middle, the torque is the largest, then the torque is gradually reduced, and then the torque is the other blind point at the lowest point.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a simple structure, laborsaving crooked formula reinforcement crank.
The utility model discloses crooked formula reinforcement crank, including the crank body, the both ends of crank body set up running-board shaft hole and well shaft hole respectively, the crank body is formed by a pole forward or backward buckling, the crank body includes circular arc pole section, circular arc transition pole section, the straight pole section that an organic whole constitutes, and the running-board shaft hole is located the tip of circular arc pole section, and well shaft hole is located the tip of straight pole section, and the axis of circular arc pole section, the axis of circular arc transition pole section, the axis of straight pole section are located the coplanar, and the axis in running-board shaft hole is parallel with the axis in well shaft hole.
The utility model discloses crooked formula reinforcement crank, wherein, the distance between the axis in running-board shaft hole and the axis in middle shaft hole is 175 mm.
The utility model discloses crooked formula reinforcement crank, wherein, the axis of circular arc pole section is the pitch arc that the radius is 170mm, the axis of circular arc transition pole section is the pitch arc that the radius is 40-50 mm.
The utility model discloses crooked formula reinforcement crank, wherein, the tangent line of the axis of circular arc transition pole section is 80mm to the planar distance at the axis in centre bore and the axis place in running-board shaft hole.
The utility model discloses crooked formula reinforcement crank wherein, still includes the decorative board, and the department of bending at the crank body is fixed to the decorative board.
The utility model discloses crooked formula reinforcement crank lies in with prior art difference, the utility model discloses crooked formula reinforcement crank simple structure, at the peak, receive the decurrent component effect of crank self gravity and each pole section, need not big power and just can produce big moment, at the in-process from the peak to the minimum in the running-board shaft hole, it is perpendicular with people's pedal direction to have the pole section all the time, moment is the biggest, no matter at the peak, minimum or intermediate position, receive the component effect of each pole section, the crank can both obtain best moment, sparingly strength.
The bending type force-increasing crank of the present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of a first embodiment of the bending type power crank of the present invention;
fig. 2 is a schematic structural view of a second embodiment of the bending type power-increasing crank of the present invention.
Detailed Description
Example one
As shown in fig. 1, the curved boosting crank of the present embodiment includes a crank body 1, two ends of the crank body 1 are respectively provided with a pedal shaft hole 10 and a middle shaft hole 15, the crank body 1 is formed by bending a rod forward, the crank body 1 includes an integrally formed arc rod section 11, an arc transition rod section 12 and a straight rod section 13, the pedal shaft hole 10 is located at an end of the arc rod section 11, the middle shaft hole 15 is located at an end of the straight rod section 13, an axis of the arc rod section 11, an axis of the arc transition rod section 12 and an axis of the straight rod section 13 are located on a same plane, and an axis of the pedal shaft hole 10 is parallel to an axis of the middle shaft hole 15.
In this embodiment, the distance between the axis of the footboard shaft hole 10 and the axis of the central shaft hole 15 is 175 mm. The axis of the arc rod section 11 is an arc line with the radius of 170mm, and the axis of the arc transition rod section 12 is an arc line with the radius of 40-50 mm. The distance from the tangent line of the axis of the arc transition rod section 12 to the plane where the axis of the center shaft hole 15 and the axis of the pedal shaft hole 10 are located is 80 mm.
As shown in fig. 1, the bending type power-increasing crank of the present embodiment further includes a decorative plate 14, the decorative plate 14 is fixed at the bending position of the crank body 1, and the decorative plate 14 plays a role in decorating and enhancing the strength of the crank.
Example two
The second embodiment is different from the first embodiment only in the bending direction of the crank body.
As shown in fig. 2, the curved boosting crank of the present embodiment includes a crank body 1, two ends of the crank body 1 are respectively provided with a pedal shaft hole 10 and a middle shaft hole 15, the crank body 1 is formed by bending a rod backwards, the crank body 1 includes an arc rod section 11, an arc transition rod section 12 and a straight rod section 13 which are sequentially connected into a whole, the pedal shaft hole 10 is located at an end of the arc rod section 11, the middle shaft hole 15 is located at an end of the straight rod section 13, an axis of the arc rod section 11, an axis of the arc transition rod section 12 and an axis of the straight rod section 13 are located on the same plane, and an axis of the pedal shaft hole 10 is parallel to an axis of the middle shaft hole 15.
In this embodiment, the distance between the axis of the footboard shaft hole 10 and the axis of the central shaft hole 15 is 175 mm. The axis of the arc rod section 11 is an arc line with the radius of 170mm, and the axis of the arc transition rod section 12 is an arc line with the radius of 40-50 mm. The distance from the tangent line of the axis of the arc transition rod section 12 to the plane where the axis of the center shaft hole 15 and the axis of the pedal shaft hole 10 are located is 80 mm.
As shown in fig. 2, the bending type power-increasing crank of the present embodiment further includes a decorative plate 14, the decorative plate 14 is fixed at the bending position of the crank body 1, and the decorative plate 14 plays a role in decorating and enhancing the strength of the crank.
When the crank is used, the left pedal and the right pedal adopt the structure of the first embodiment or adopt the structure of the second embodiment simultaneously, and the two cranks are arranged at two ends of a middle shaft of the bicycle (the end parts of the two cranks with the middle shaft hole are connected with the middle shaft, and the end parts of the two cranks with the pedal shaft hole are respectively connected with the two pedals).
The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (5)
1. A bending type force-increasing crank is characterized in that: the crank comprises a crank body (1), wherein pedal plate shaft holes (10) and middle shaft holes (15) are respectively formed in two ends of the crank body (1), the crank body (1) is formed by bending a rod forwards or backwards, the crank body (1) comprises an arc rod section (11), an arc transition rod section (12) and a straight rod section (13) which are integrally formed, the pedal plate shaft holes (10) are located at the end parts of the arc rod section (11), the middle shaft holes (15) are located at the end parts of the straight rod section (13), the axis of the arc rod section (11), the axis of the arc transition rod section (12) and the axis of the straight rod section (13) are located on the same plane, and the axis of the pedal plate shaft holes (10) is parallel to the axis of the middle shaft holes (15).
2. The curved power crank of claim 1, wherein: the distance between the axis of the pedal plate shaft hole (10) and the axis of the middle shaft hole (15) is 175 mm.
3. The curved power crank of claim 2, wherein: the axis of the arc rod section (11) is an arc line with the radius of 170mm, and the axis of the arc transition rod section (12) is an arc line with the radius of 40-50 mm.
4. The curved power crank of claim 3, wherein: the distance from the tangent line of the axis of the arc transition rod section (12) to the plane where the axis of the center shaft hole (15) and the axis of the pedal plate shaft hole (10) are located is 80 mm.
5. The curved power crank of claim 4, wherein: the crank body (1) is characterized by further comprising a decorative plate (14), wherein the decorative plate (14) is fixed at the bending position of the crank body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020901402.XU CN213139052U (en) | 2020-05-25 | 2020-05-25 | Bending type force-increasing crank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020901402.XU CN213139052U (en) | 2020-05-25 | 2020-05-25 | Bending type force-increasing crank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213139052U true CN213139052U (en) | 2021-05-07 |
Family
ID=75723797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020901402.XU Expired - Fee Related CN213139052U (en) | 2020-05-25 | 2020-05-25 | Bending type force-increasing crank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213139052U (en) |
-
2020
- 2020-05-25 CN CN202020901402.XU patent/CN213139052U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1277720C (en) | Bicycle handlebars | |
| EP1582448A3 (en) | Bicycle crank arm | |
| CN213139052U (en) | Bending type force-increasing crank | |
| CN214930406U (en) | Bending bicycle crank | |
| CN217623958U (en) | Bicycle booster crank | |
| CN211196497U (en) | Bicycle booster crank | |
| CN2776049Y (en) | Fishing pole | |
| CN211032890U (en) | Frame front main beam and connection structure | |
| CN2425848Y (en) | Crank for bicycle | |
| CN216269738U (en) | Crank pedal assembly, bicycle and electric bicycle | |
| CN214661474U (en) | Connecting piece on latus rectum bending machine | |
| CN2699051Y (en) | Wheel pin device for baby carriage | |
| CN202827963U (en) | Motorcycle rear braking pedal | |
| CN220430375U (en) | High-strength wear-resistant motorcycle pedal | |
| CN219237274U (en) | Telescopic crank of electric bicycle | |
| CN211027962U (en) | Feeding mechanism of cold header | |
| CN201872831U (en) | Bicycle frame | |
| CN217074040U (en) | Automobile accelerator brake pedal support | |
| CN212074326U (en) | Bicycle crank with two-segment structure | |
| CN218839682U (en) | Lightweight electric bicycle chain wheel square sleeve, chain wheel assembly and die | |
| CN210555370U (en) | Improved bicycle frame head pipe structure | |
| CN219029676U (en) | Bicycle fluted disc connecting device | |
| CN2654492Y (en) | Bicycle integrated front fork structure | |
| CN2691981Y (en) | Comfortable bicycle saddle | |
| CN2486451Y (en) | Bicycle driving mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210507 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |