CN201712753U - Hollow crank of bicycle - Google Patents
Hollow crank of bicycle Download PDFInfo
- Publication number
- CN201712753U CN201712753U CN2010201367566U CN201020136756U CN201712753U CN 201712753 U CN201712753 U CN 201712753U CN 2010201367566 U CN2010201367566 U CN 2010201367566U CN 201020136756 U CN201020136756 U CN 201020136756U CN 201712753 U CN201712753 U CN 201712753U
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- CN
- China
- Prior art keywords
- handle body
- preformed hole
- connecting bore
- bore assembly
- crank
- 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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Abstract
The utility model discloses a hollow crank of a bicycle, which aims to ensure that the crank of the bicycle keeps high strength and light weight. The crank body of the hollow crank comprises an upper crank body and a lower crank body that are welded, wherein a first prepared hole and a second prepared hole are respectively formed at two ends of the upper crank body, a third prepared hole and a fourth prepared hole are respectively formed at two ends of the lower crank body, a first connection hole component is arranged between the first prepared hole and the third prepared hole, and a second connection hole component is arranged between the second prepared hole and the fourth prepared hole. Compared with the prior art, the hollow space in the crank is larger, thereby resulting in remarkable weight lightening effect; the crank is divided into the upper and the lower crank bodies and the connection hole components to be manufactured, thereby reducing the difficulty of manufacture and improving the flexibility of manufacture; and by virtue of the design of reserved edges, the outer edges of the upper and the lower crank bodies can be welded without using welding rods, thereby achieving the best intensity. Therefore, the crank has the advantages of high strength, light weight and easy manufacture even with large-area hollow space.
Description
Technical field
The utility model relates to the crank structure of a kind of bicycle, particularly a kind of bicycle.
Background technology
Bicycle is that a kind of riding instead of walk has the vehicle of motion concurrently, and lightweight is the target that people pursue always.And crank is as the vitals of bicycle, and making its lightweight and having high strength concurrently is pursuing one's goal of people always.The crank structure of prior art is for adopting the metallic material inblock cast or using the metal embryo to form through forging, and in order to make the crank lightweight, people begin structurally mainly to adopt hollow structure.
The disclosed a kind of crank structure of Chinese patent publication number CN1151958A: real structure in the length direction both ends of footstalk make, the length direction central part makes hollow structure, above-mentioned hollow structure is to reserve the next chase that extends to length direction at the crank back side, and cover plate of welding forms on chase again.The crank two ends adopt the method for deep hole working to process the connecting bore of connecting crank axle and stretcher axle respectively on middle real structure.Such scheme, real structure in adopt at the both ends of crank still can be gained in weight fully lightweight.The crank body is no matter be to adopt casting or forging molding simultaneously, and the equal more complicated of its job operation increases productive costs, is unfavorable for producing in enormous quantities.
The disclosed a kind of crank structure of Chinese patent publication number CN201179942Y: formed by upper and lower opposed main frame and secondary framework, this major and minor framework adopts and is made of one piece, and surperficial upper and lower opposed with the face area maximum, and establish a recessed frame groove, thereby make the crank structure that the frame groove of major and minor framework can involutory each other formation hollow in this counter surface.Such scheme adopts the involutory method of frame groove of major and minor framework to increase the thickness of involutory surface, has increased the own weight of material usage and crank, and each surface thickness of crank itself is differed.Simultaneously, the connecting bore of connecting crank axle is to adopt with main frame to be made of one piece, and the connecting bore of connecting pin pedal is to adopt with secondary framework to be made of one piece, and is difficult to the embark on journey connecting bore of more complicated of one.
Summary of the invention
The purpose of this utility model provides a kind of bicycle hollow crank, and the technical matters that solve is to make bicycle crank keep further lightweight under the high-intensity situation, and is easy to make.
The utility model is by the following technical solutions: a kind of bicycle hollow crank, comprise the handle body, described handle body is welded to form by handle body on the integrated hollow and integrated handle body down, described two ends of going up the handle body have first preformed hole and second preformed hole, the two ends of following handle body have and first preformed hole and corresponding the 3rd preformed hole of second preformed hole and the 4th preformed hole, be provided with the first connecting bore assembly between described first preformed hole and the 3rd preformed hole, be provided with the second connecting bore assembly between second preformed hole and the 4th preformed hole.
The front and back ends downside of going up the handle body of the present utility model is provided with first and reserves the limit and the second reservation limit.
The first connecting bore assembly of the present utility model is a hollow columnar structures, its cross-sectional shape is the convex shape structure, the top external diameter equates with first preformed hole, the equal diameters of lower outer diameter and the 3rd preformed hole, form step between top external diameter and lower outer diameter, the inside of the described first connecting bore assembly is I-shape construction.
The second connecting bore assembly of the present utility model is a hollow columnar structures, the equal diameters of its external diameter and second preformed hole, the 4th preformed hole.
Upward handle body of the present utility model, following handle body, the first connecting bore assembly and the second connecting bore assembly are alloy material.
Upward handle body of the present utility model reaches down, and the thickness of handle body is 1.2-2.0mm.
The slightly larger in diameter of preformed hole of the present utility model is slightly larger than the external diameter of connecting bore assembly bottom and corresponding up and down with the position of connecting bore assembly in the external diameter of the external diameter on connecting bore assembly top, preformed hole; The external diameter that the diameter of described preformed hole, preformed hole is identical, be slightly larger than the connecting bore assembly and corresponding up and down with the position of connecting bore assembly.
The bottom of connecting bore assembly of the present utility model is embedded in down the inboard of the preformed hole of handle body, the step of connecting bore assembly aligns with the inside face of following handle body, the bottom of described connecting bore assembly is embedded in down the inboard of the preformed hole of handle body, and the outside face joint of the inside face of following handle body and connecting bore assembly uses welding fixing.
The lower edge of going up the handle body of the present utility model is involutory mutually with the upper limb of following handle body, described reservation limit of going up the handle body through welding after and the upper limb of following handle body merge formation osed top handle body fully.
The top of connecting bore assembly of the present utility model is embedded in the inboard of the preformed hole of handle body, the upper surface is a little more than the outside face of last handle body, the fixing weld nugget that forms of welding is used with the outside face junction of last handle body in the upper outside surface of connecting bore assembly, the top of described connecting bore assembly is embedded in the inboard of the preformed hole of handle body, the upper surface is a little more than the outside face of last handle body, and the upper outside of connecting bore assembly surface uses welding fixing with the outside face junction of last handle body.
The utility model is compared with prior art, its crank inner hollow area is big, weight loss effect is remarkable, be divided into upper and lower handle body and connecting bore assembly simultaneously and make respectively, reduced manufacture difficulty, increased the flexibility ratio of producing, by reserving the design on limit, can under the situation of not using welding rod, weld by the outward flange to upper and lower handle body, can obtain best intensity, make crank under the situation of large tracts of land hollow, still have high strength, in light weight, the advantage that is easy to make.
Description of drawings
Fig. 1 is STRUCTURE DECOMPOSITION figure of the present utility model.
Fig. 2-the 1st, the structural representation of going up the handle body first reservation limit of the present utility model.
Fig. 2-the 2nd, the structural representation of going up the handle body second reservation limit of the present utility model.
Fig. 3 is the longitudinal sectional view of the utility model hollow crank.
The specific embodiment
Below in conjunction with embodiment the utility model is further described in detail.As shown in Figure 1, bicycle hollow crank of the present utility model has the handle body, described handle body is by the integrated handle body 1 of going up, integrated handle body down 2 is formed, described two ends of going up handle body 1 have the first preformed hole 4-1 and the second preformed hole 3-1, have the 3rd preformed hole 4-2 and the 4th preformed hole 3-2 on described handle body 2 two ends down and the first preformed hole 4-1 and the second preformed hole 3-1 correspondence position, between the first preformed hole 4-1 and the 3rd preformed hole 4-2, be provided with the first connecting bore assembly 4, be provided with the second connecting bore assembly 3 between the second preformed hole 3-1 and the 4th preformed hole 3-2, described lower edge both sides of going up handle body 1 are respectively equipped with to be reserved limit 1-1 and reserves limit 1-2, the described handle body 1 of going up, the first preformed hole 4-1, the second preformed hole 3-1, the first reservation limit 1-1 and second reserves limit 1-2 and adopts sheet metal one-body molded through forging punching press, described handle body 2 down, the 3rd preformed hole 4-2 and the 4th preformed hole 3-2 adopt sheet metal one-body molded through forging punching press, its upper edge shape, the lower edge of size and last handle body 1 is in full accord, and the lower edge of last handle body 1 can form an osed top handle body with the upper limb of following handle body 2 is involutory.
The hollow columnar structures that the described first connecting bore assembly 4 processes for metal bar, its cross-sectional shape is a convex shape, the equal diameters of the equal diameters of the top external diameter and the first preformed hole 4-1, lower outer diameter and the 3rd preformed hole 4-2, form step between top external diameter and lower outer diameter, its inside is I-shape construction, shape and crank shaft profile match, can be according to the different needed interior shapes of crank shaft profile flexible design in the actual production.
The hollow columnar structures that the described second connecting bore assembly 3 processes for metal bar, the equal diameters of its external diameter and the second preformed hole 3-1, the 4th preformed hole 3-2, its interior shape and stretcher axle profile match, can be according to the different needed interior shapes of stretcher axle profile flexible design in the actual production.
The diameter of the described first preformed hole 4-1 and the first connecting bore assembly, 4 upper part diameter equate, the equal diameters of the diameter of the 3rd preformed hole 4-2 and the first connecting bore assembly, 4 bottoms and corresponding up and down with the position of the first connecting bore assembly 4, the diameter of the described second preformed hole 3-1, the 4th preformed hole 3-2 and the equal diameters of the second connecting bore assembly 3 and with the position of the second connecting bore assembly 3 about corresponding.
As shown in Figure 3, the bottom of the described first connecting bore assembly 4 is embedded in down the inboard of the 3rd preformed hole 4-2 of handle body 2, the step of the first connecting bore assembly 4 aligns with the inside face of following handle body 2, and use welding to fix formation weld nugget 7, the bottom of the described second connecting bore assembly 3 is embedded in down the inboard of the 4th preformed hole 3-2 of handle body 2, thereby the fixing weld nugget 8 that forms of welding is used in the outside face joint of the inside face of following handle body 2 and the second connecting bore assembly 3.
The lower edge of described upward handle body 1 is involutory mutually with the upper limb of following handle body 2, described go up first of handle body 1 reserve limit 1-1 (shown in Fig. 2-1), second reserve limit 1-2 (shown in Fig. 2-2) through welding after and the upper limb of following handle body 2 merge fully, form osed top handle body, because the design of reserving the limit is arranged, do not need during welding to infiltrate with welding rod, the material of handle body 1 and following handle body 2 is directly welded, can obtain best intensity, can save the welding rod material material again.The top of the described first connecting bore assembly 4 is embedded in the inboard of the first preformed hole 4-1 of handle body 1, the upper surface is a little more than the outside face of last handle body 1, the fixing weld nugget 6 that forms of welding is used with the outside face junction of last handle body 1 in the upper outside surface of the first connecting bore assembly 4, the top of the described second connecting bore assembly 3 is embedded in the inboard of the second preformed hole 3-1 of handle body 1, the upper surface is a little more than the outside face of last handle body 1, the fixing weld nugget 6-1 that forms of welding is used with the outside face junction of last handle body 1 in the upper outside surface of the second connecting bore assembly 3, and the crank that assembles forms large-area cavity 5 in inside.
Described handle body 1, following handle body 2, the first connecting bore assembly 4 and the second connecting bore assembly 3 gone up made by same alloy material.
Crank inner hollow area of the present utility model is big, and weight loss effect is remarkable, is divided into upper and lower handle body and connecting bore assembly simultaneously and makes respectively, has reduced manufacture difficulty, has increased the flexibility ratio of producing.By reserving the design on limit, can under the situation of not using welding rod, weld by the outward flange to upper and lower handle body, can obtain best intensity, make crank under the situation of large tracts of land hollow, still have high strength.
Claims (10)
1. bicycle hollow crank, comprise the handle body, it is characterized in that: described handle body is welded to form by handle body (1) on the integrated hollow and integrated handle body (2) down, described two ends of going up handle body (1) have first preformed hole (4-1) and second preformed hole (3-1), the two ends of following handle body (2) have and first preformed hole (4-1) and corresponding the 3rd preformed hole of second preformed hole (3-1) (4-2) and the 4th preformed hole (3-2), be provided with the first connecting bore assembly (4) between described first preformed hole (4-1) and the 3rd preformed hole (4-2), be provided with the second connecting bore assembly (3) between second preformed hole (3-1) and the 4th preformed hole (3-2).
2. bicycle hollow crank according to claim 1 is characterized in that: the described front and back ends downside of going up handle body (1) is provided with first and reserves the limit (1-1) and the second reservation limit (1-2).
3. bicycle hollow crank according to claim 2, it is characterized in that: the described first connecting bore assembly (4) is hollow columnar structures, its cross-sectional shape is the convex shape structure, the top external diameter equates with first preformed hole (4-1), the equal diameters of lower outer diameter and the 3rd preformed hole (4-2), form step between top external diameter and lower outer diameter, the inside of the described first connecting bore assembly (4) is I-shape construction.
4. bicycle hollow crank according to claim 3 is characterized in that: the described second connecting bore assembly (3) is a hollow columnar structures, the equal diameters of its external diameter and second preformed hole (3-1), the 4th preformed hole (3-2).
5. bicycle hollow crank according to claim 4 is characterized in that: described upward handle body (1), following handle body (2), the first connecting bore assembly (4) and the second connecting bore assembly (3) are alloy material.
6. bicycle hollow crank according to claim 5 is characterized in that: the thickness of described last handle body (1) and following handle body (2) is 1.2-2.0mm.
7. bicycle hollow crank according to claim 6 is characterized in that: the slightly larger in diameter of described preformed hole (4-1) is slightly larger than the external diameter of connecting bore assembly (4) bottom and corresponding up and down with the position of connecting bore assembly (4) in the external diameter of the external diameter on connecting bore assembly (4) top, preformed hole (4-2); The external diameter that the diameter of described preformed hole (3-1), preformed hole (3-2) is identical, be slightly larger than connecting bore assembly (3) and corresponding up and down with the position of connecting bore assembly (3).
8. bicycle hollow crank according to claim 7, it is characterized in that: the bottom of described connecting bore assembly (4) is embedded in down the inboard of the preformed hole (4-2) of handle body (2), the step of connecting bore assembly (4) aligns with the inside face of following handle body (2), the bottom of described connecting bore assembly (3) is embedded in down the inboard of the preformed hole (3-2) of handle body (2), and the outside face joint of the inside face of following handle body (2) and connecting bore assembly (3) uses welding fixing.
9. bicycle hollow crank according to claim 8, it is characterized in that: the lower edge of described upward handle body (1) is involutory mutually with the upper limb of following handle body (2), formation osed top handle body is merged fully with the upper limb of following handle body (2) in described reservation limit (1-1) of going up handle body (1) through welding after.
10. bicycle hollow crank according to claim 9, it is characterized in that: the top of described connecting bore assembly (4) is embedded in the inboard of the preformed hole (4-1) of handle body (1), the upper surface is a little more than the outside face of last handle body (1), the fixing weld nugget (6) that forms of welding is used with the outside face junction of last handle body (1) in the upper outside surface of connecting bore assembly (4), the top of described connecting bore assembly (3) is embedded in the inboard of the preformed hole (3-1) of handle body (1), the upper surface is a little more than the outside face of last handle body (1), and the upper outside of connecting bore assembly (3) surface uses welding fixing with the outside face junction of last handle body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201367566U CN201712753U (en) | 2010-03-18 | 2010-03-18 | Hollow crank of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201367566U CN201712753U (en) | 2010-03-18 | 2010-03-18 | Hollow crank of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201712753U true CN201712753U (en) | 2011-01-19 |
Family
ID=43458752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201367566U Expired - Fee Related CN201712753U (en) | 2010-03-18 | 2010-03-18 | Hollow crank of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201712753U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109572911A (en) * | 2018-11-29 | 2019-04-05 | 余其越 | A kind of bicycle hollow crank shaft assemblies and its manufacturing method |
| US11142280B2 (en) | 2016-03-24 | 2021-10-12 | The Hive Global, Inc. | Bicycle crank with spindle attachment structure |
| US11351815B2 (en) | 2017-08-21 | 2022-06-07 | The Hive Global, Inc. | Bicycle cassette with clamping connection |
| US11485449B2 (en) | 2015-09-01 | 2022-11-01 | The Hive Global, Inc. | Bicycle cassette with locking connection |
| US11932351B2 (en) | 2020-07-17 | 2024-03-19 | The Hive Global, Inc. | Conical bicycle cassette sprocket structure |
| US12030586B2 (en) | 2021-07-12 | 2024-07-09 | The Hive Global, Inc. | Seal for bicycle crank with differential chainring motion |
-
2010
- 2010-03-18 CN CN2010201367566U patent/CN201712753U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11485449B2 (en) | 2015-09-01 | 2022-11-01 | The Hive Global, Inc. | Bicycle cassette with locking connection |
| US11142280B2 (en) | 2016-03-24 | 2021-10-12 | The Hive Global, Inc. | Bicycle crank with spindle attachment structure |
| US11351815B2 (en) | 2017-08-21 | 2022-06-07 | The Hive Global, Inc. | Bicycle cassette with clamping connection |
| CN109572911A (en) * | 2018-11-29 | 2019-04-05 | 余其越 | A kind of bicycle hollow crank shaft assemblies and its manufacturing method |
| US11932351B2 (en) | 2020-07-17 | 2024-03-19 | The Hive Global, Inc. | Conical bicycle cassette sprocket structure |
| US12030586B2 (en) | 2021-07-12 | 2024-07-09 | The Hive Global, Inc. | Seal for bicycle crank with differential chainring motion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20140318 |