CN1864888A - Method for manufacturing open type bicycle hollow crank and crank manufactured thereby - Google Patents
Method for manufacturing open type bicycle hollow crank and crank manufactured thereby Download PDFInfo
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- CN1864888A CN1864888A CN 200510071175 CN200510071175A CN1864888A CN 1864888 A CN1864888 A CN 1864888A CN 200510071175 CN200510071175 CN 200510071175 CN 200510071175 A CN200510071175 A CN 200510071175A CN 1864888 A CN1864888 A CN 1864888A
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- crank
- hollow
- rearward end
- bicycle
- forging
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Abstract
The invention relates to a method for producing open hollow crank of vehicle, and relative crank. Said method comprises: (1), initially shaping the crank that putting the material into mould to be shaped via forging press, to form a front part and a back part, while the back part is processed into open shape and the front part has a through hole matched with vehicle pedals; (2), making the crank hollow that using the step that making the back part open, to directly make the crank hollow along the axle via drilling or other method; (3), forging and shaping the back part that after making the whole crank hollow, then forging the open back part to be the open shape that matched with the spindle of five tubes of vehicle frame. The invention can reduce the weight of whole crank.
Description
Technical field
The present invention relates to the manufacture method of bicycle crank and, be meant the manufacture method of open type bicycle crank and the bicycle crank of making by this method especially by the crank structure that this method is made.
Background technology
Consult shown in Figure 4, the manufacture method of existing open type bicycle crank 2, its general main employing is with casting or forging mode, and after whole crank 2 directly be made into integration, establish a perforation 21 in the leading section of crank 2 again, for combining the location with bicycle pedal axle (not drawing), thereafter the end then establish opening-like 22, can for the frame five-through pipe of bicycle in axle (not drawing) do to cooperate the location.
Yet, existing this kind open type bicycle crank 2, because of its whole crank is solid shape, therefore, make whole crank structure have certain weight, and more and more stress today of lighting at bicycle at present, how to make that the product lighting promptly is that the dealer is eager to pursue part, so its Heavy Weight is the part that haves much room for improvement.
Add, be because of whole crank under the structural design of solid shape, make whole crank especially when initial the manufacturing, also increase its material cost virtually, and have much room for improvement and overcome.
Summary of the invention
Technical problem to be solved by this invention is made existing above-mentioned shortcoming with casting method and is provided a kind of manufacture method of open type bicycle hollow crank and the crank of being made by this method at the bicycle crank that tradition is open type, hollow opening formula bicycle crank can be made, the more effect of lighting of overall structure can be reached.
The manufacture method of a kind of open type bicycle hollow crank provided by the invention, key step comprises:
(1) the preliminary forming step of crank: the raw material of bicycle hollow crank is forged one-step forming just with the forging and pressing facility in mould, make and form a leading section and rearward end, thereafter the opening shape is further made in the end, and its leading section then makes one simultaneously for the perforation that cooperates with bicycle pedal;
(2) the hollow step is made in crank inside: utilize the crank rear end to become under the ringent processing procedure, directly the axial direction along crank inside is set as hollow form with boring or forging mode with it from these openend central authorities;
(3) crank rearward end forging and molding step: after whole crank axial inner made hollow form, again will this opening-like crank rearward end impose press forging and make program, and make the crank rear end make cooperating and be the open type shape with the axle at the five-way pipe place of cycle frame;
And, can reach the manufacture method of hollow crank easily by above-mentioned processing procedure.
According to the made bicycle crank of said method, this crank is provided with a leading section and rearward end; Leading section is provided with the perforation that cooperates with bicycle pedal, and rearward end becomes the opening shape; The openend central authorities of this rearward end are set as hollow form along the axial direction of crank inside.
Promptly can be made into a kind of hollow crank structure of bicycle by above-mentioned manufacturing step, can be easily with the structure of the solid shape of the former one-tenth of traditional open type bicycle crank, the Heavy Weight that causes, and form that material cost increases and shortcoming that can't lighting improves and overcomes, and can make a crank for bicycle structure that is hollow easily, it is simple to reach the structure manufacturing, can save the effect of material cost and light in structure materialization.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention.
Just one-step forming, crank rearward end form opening shape and the inner schematic perspective view of making hollow form and crank rearward end forging and molding to Fig. 2 for crank of the present invention.
Fig. 3 is that the A-A of Fig. 2 is to cutaway view.
Fig. 4 is the schematic appearance of existing open type bicycle crank.
The main element symbol description
2 ... crank 21 ... perforation 22 ... the opening shape
3 ... crank 31 ... leading section 311 ... perforation
32 ... rearward end 321 ... opening shape 33 ... hollow form
The specific embodiment
Cooperate shown in Fig. 1,2,3, the manufacture method of open type bicycle hollow crank 3 of the present invention, its key step includes:
(1) crank 3 preliminary forming steps: the raw material of bicycle hollow crank is forged one-step forming just with the forging and pressing facility in mould, make it form a leading section 31 and rearward end 32, rearward end 32 is further made opening shape 321, and its leading section 31 then makes one simultaneously for the perforation 311 that cooperates with bicycle pedal (not drawing);
(2) the hollow step is made in crank 3 inside: utilize under the processing procedure of 32 one-tenth opening shapes 321 of crank 3 rearward end, directly the axial direction along crank 3 inside is set as hollow form 33 with boring, forging or alternate manner with it from these openend central authorities;
(3) crank 3 rearward end 32 forging and molding steps: after whole crank 3 axial inner are made hollow form 33, again will these crank of opening-like 321 3 rearward end 32 impose press forging and make program, and make crank 3 rearward end 32 make cooperating and be the open type shape with the axle at cycle frame five-way pipe place.
According to the made bicycle crank 3 of said method, this crank 3 is provided with a leading section 31 and rearward end 32; Leading section 31 is provided with the perforation 311 that cooperates with bicycle pedal, and rearward end 32 is set as opening shape 321; The openend central authorities of this rearward end 32 are set as hollow form 33 along the axial direction of crank 3 inside.
By above-mentioned manufacturing step and made crank structure, can be easily with the structure of the solid shape of the former one-tenth of traditional open type bicycle crank, the Heavy Weight that causes, and form that material cost increases and shortcoming that can't lighting improves and overcomes, and can make a crank for bicycle structure that is hollow easily, it is simple to reach a structure manufacturing, can save the effect of material cost and light in structure materialization.
Claims (2)
1. the manufacture method of an open type bicycle hollow crank is characterized in that, key step includes:
(1) the preliminary forming step of crank: the raw material of bicycle hollow crank is forged one-step forming just with the forging and pressing facility in mould, make and form a leading section and rearward end, thereafter the opening shape is further made in the end, and its leading section then makes one simultaneously for the perforation that cooperates with bicycle pedal;
(2) the hollow step is made in crank inside: utilize the crank rear end to become under the ringent processing procedure, directly the axial direction along crank inside is set as hollow form with boring or forging mode with it from these openend central authorities;
(3) crank rearward end forging and molding step: after whole crank axial inner made hollow form, again will this opening-like crank rearward end impose press forging and make program, and make the crank rear end make cooperating and be the open type shape with the axle at the five-way pipe place of cycle frame;
And, can reach the manufacture method of hollow crank easily by above-mentioned processing procedure.
2. bicycle crank of making according to the method for claim 1, this crank is provided with a leading section and rearward end; Leading section is provided with the perforation that cooperates with bicycle pedal, and rearward end becomes the opening shape; It is characterized in that the openend central authorities of this rearward end are set as hollow form along the axial direction of crank inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100711752A CN100379506C (en) | 2005-05-20 | 2005-05-20 | Method for manufacturing open type bicycle hollow crank and crank manufactured thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100711752A CN100379506C (en) | 2005-05-20 | 2005-05-20 | Method for manufacturing open type bicycle hollow crank and crank manufactured thereby |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1864888A true CN1864888A (en) | 2006-11-22 |
| CN100379506C CN100379506C (en) | 2008-04-09 |
Family
ID=37424116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100711752A Expired - Fee Related CN100379506C (en) | 2005-05-20 | 2005-05-20 | Method for manufacturing open type bicycle hollow crank and crank manufactured thereby |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100379506C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033155A (en) * | 2015-04-23 | 2015-11-11 | 山东神力索具有限公司 | Processing technology for double-lug wedge wire clamp housing for electric railway |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5010785A (en) * | 1990-06-11 | 1991-04-30 | Seattle Bike Supply | Crank arm for a bicylce |
| CN2188541Y (en) * | 1994-03-18 | 1995-02-01 | 唐翰章 | Crank of bicycle |
| CN2470233Y (en) * | 2001-02-26 | 2002-01-09 | 张昇常 | Bicycle hollow crank |
| US7503239B2 (en) * | 2003-01-30 | 2009-03-17 | Shimano Inc. | Bicycle crank arm assembly |
| US7181823B2 (en) * | 2003-09-09 | 2007-02-27 | Jie Dong Zeng | Method for manufacturing integrated bicycle crank arm and spider assembly and the crank arm and spider assembly made thereby |
-
2005
- 2005-05-20 CN CNB2005100711752A patent/CN100379506C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033155A (en) * | 2015-04-23 | 2015-11-11 | 山东神力索具有限公司 | Processing technology for double-lug wedge wire clamp housing for electric railway |
| 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 |
| US11932351B2 (en) | 2020-07-17 | 2024-03-19 | The Hive Global, Inc. | Conical bicycle cassette sprocket structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100379506C (en) | 2008-04-09 |
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| C14 | Grant of patent or utility model | ||
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Owner name: SHIENY INTERNATIONAL CO., LTD. Free format text: FORMER OWNER: ZHANYING INDUSTRIAL CO., LTD. Effective date: 20110210 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: TAICHUNG COUNTY, TAIWAN, CHINA TO: TAICHUNG COUNTY, TAIWAN PROVINCE, CHINA |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110210 Address after: Taichung County, Taiwan, China Patentee after: Shieny International Co.,Ltd. Address before: Taichung County, Taiwan, China Patentee before: Zhanying Industrial Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080409 Termination date: 20210520 |
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| CF01 | Termination of patent right due to non-payment of annual fee |