CN102874367A - Toothed cylindrical piece for assembling and locking handlebar stand pipe and front fork stand pipe and manufacturing process for toothed cylindrical piece - Google Patents
Toothed cylindrical piece for assembling and locking handlebar stand pipe and front fork stand pipe and manufacturing process for toothed cylindrical piece Download PDFInfo
- Publication number
- CN102874367A CN102874367A CN2012103884984A CN201210388498A CN102874367A CN 102874367 A CN102874367 A CN 102874367A CN 2012103884984 A CN2012103884984 A CN 2012103884984A CN 201210388498 A CN201210388498 A CN 201210388498A CN 102874367 A CN102874367 A CN 102874367A
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- cylindrical piece
- toothed cylindrical
- crow
- front fork
- stand pipe
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Abstract
The invention discloses a toothed cylindrical piece for assembling and locking a handlebar stand pipe and a front fork stand pipe and a manufacturing process for the toothed cylindrical piece. The toothed cylindrical piece comprises a toothed cylindrical piece body, and strip-shaped teeth are uniformly distributed on the cylindrical surface of the toothed cylindrical piece body circularly. The toothed cylindrical piece body is made of an alloy steel material, and the torsional strength of the toothed cylindrical piece body ranges from 480kgf-cm to 550kgf-com. The toothed cylindrical piece is formed by striking and forging through a multi-station cold heading machine, the surface of the toothed cylindrical piece is smooth, the size of the toothed cylindrical piece is precise, the inside of the toothed cylindrical piece is compact, the locking strength is high, the strip-shaped teeth are uniformly distributed on the cylindrical surface of the toothed cylindrical piece circularly, and the force of friction between the toothed cylindrical piece and the inner wall of the front fork stand pipe is high. Moreover, dust and waste gas are not generated in the manufacturing process, so that environmental pollution is avoided.
Description
Technical field
The present invention is applied to the bicycle field, relates to specifically a kind of crow department for stem and standpipe of front fork assembling locking.
Background technology
In the prior art, the assembling and positioning of handlebar stem for bicycle and standpipe of front fork relies in the crow department of fixing and stem lower end and the friction between the standpipe of front fork inwall and realizes, concrete is mutually to push by the inclined-plane of stem lower end and the inclined-plane of crow department, produce dislocation, the cylinder that crow is taken charge of outwards pushes the inwall of standpipe of front fork, thereby produce a friction force, so that the assembling and positioning of handlebar stem for bicycle and standpipe of front fork.
Referring to shown in Figure 1, in order to increase the friction force between crow department and the standpipe of front fork, be furnished with the bar shaped tooth on the cylinder of crow department, but owing to make black technique of taking charge of in the prior art by the iron casting moulding, therefore existing crow is taken charge of and is cast iron quality, and because the needs of the demoulding, the distribution limit of the bar shaped tooth on this kind crow department cylinder is generally all in 120 °-180 °, be difficult to further increase the layout scope of bar shaped tooth, indirectly limited the further lifting of the coupling mechanism force of black department own.Further, this manufacture craft has also caused crow of the prior art department to have following shortcoming: 1, the crow department rough surface of founding moulding, the size difference between each product are larger; 2, interiors of products has impurity and pore, and in the larger situation of coupling mechanism force, ftracture easily (locking intensity is generally at 250-400kgf-cm), comprehensive mechanical performance is poor; 3, dust and waste gas that founding technique produces are larger to the pollution of environment.
Summary of the invention
, material low for the form accuracy that overcomes in the prior art crow department be inner impurity and pore and the lower shortcoming of overall mechanical characteristics, the object of the present invention is to provide a kind of crow department and makes the technique of this crow department.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of crow department for stem and standpipe of front fork assembling locking comprises a crow department body, and 360 ° are evenly equipped with the bar shaped tooth on the cylinder of described black department body.
Further, it is the alloy steel material that described crow is taken charge of body, and its torsion strength is between 480-550kgf-cm.
A kind of manufacture craft of the crow department for stem and standpipe of front fork assembling locking, it may further comprise the steps:
Step 1) cold drawing alloy steel iron bar;
Step 2) the alloy steel iron bar after will stretching carries out stress relieving;
Step 3) the alloy iron bar after will annealing by a multistage cold former forges moulding, and obtaining an end is 360 ° of first cylinder workpiece that are evenly equipped with the bar shaped tooth on inclined-plane and the cylinder;
Step 4) described the first cylinder workpiece is holed and tapping, obtain axially going up the second cylinder workpiece with threaded hole;
Step 5) described the second main body workpiece is carried out superficial cementation and process, obtain needed alloy steel crow and take charge of.
The invention has the beneficial effects as follows:
1, crow department of the present invention by with the alloy steel cold-heading molding, any surface finish, compact dimensions is accurate.
2, crow of the present invention is taken charge of interior solid, and locking intensity (torsion) can not ftracture when coupling mechanism force is large at 480-550kgf-cm.
3, crow of the present invention is taken charge of 360 ° of damaged surface and is evenly equipped with the bar shaped tooth, and the friction force of standpipe of front fork inwall is large.
4, manufacture craft of the present invention produces without dust and waste gas, and environment is not polluted.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification sheets, below with preferred embodiment of the present invention and cooperate accompanying drawing to be described in detail as follows.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of crow department in the prior art.
Fig. 2 is the structural representation that crow of the present invention is taken charge of.
Number in the figure explanation: 1, crow department body, 2, the bar shaped tooth.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Embodiment 1:
Reference is shown in Figure 2, and a kind of crow department for stem and standpipe of front fork assembling locking comprises a crow department body 1, and 360 ° are evenly equipped with bar shaped tooth 2 on the cylinder of described black department body 1.
Further, it is the alloy steel material that described crow is taken charge of body 1, and its torsion strength is between 480-550kgf-cm.
Embodiment 2:
A kind of manufacture craft of the crow department for stem and standpipe of front fork assembling locking, it may further comprise the steps:
Step 1) cold drawing alloy steel iron bar;
Step 2) the alloy steel iron bar after will stretching carries out stress relieving;
Step 3) the alloy iron bar after will annealing by a multistage cold former forges moulding, and obtaining an end is 360 ° of first cylinder workpiece that are evenly equipped with the bar shaped tooth on inclined-plane and the cylinder;
Step 4) described the first cylinder workpiece is holed and tapping, obtain axially going up the second cylinder workpiece with threaded hole;
Step 5) described the second main body workpiece is carried out superficial cementation and process, obtain needed alloy steel crow and take charge of.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the crow department that is used for stem and standpipe of front fork assembling locking comprises a crow department body (1), and it is characterized in that: 360 ° are evenly equipped with bar shaped tooth (2) on the cylinder of described crow department's body (1).
2. the crow department for stem and standpipe of front fork assembling locking according to claim 1, it is characterized in that: described crow department's body (1) is the alloy steel material, and its torsion strength is between 480-550kgf-cm.
3. make the technique that crow as claimed in claim 1 or 2 is taken charge of, it is characterized in that, may further comprise the steps:
Step 1) cold drawing alloy steel iron bar;
Step 2) the alloy steel iron bar after will stretching carries out stress relieving;
Step 3) the alloy iron bar after will annealing by a multistage cold former forges moulding, and obtaining an end is 360 ° of first cylinder workpiece that are evenly equipped with the bar shaped tooth on inclined-plane and the cylinder;
Step 4) described the first cylinder workpiece is holed and tapping, obtain axially going up the second cylinder workpiece with threaded hole;
Step 5) described the second main body workpiece is carried out superficial cementation and process, obtain needed alloy steel crow and take charge of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103884984A CN102874367A (en) | 2012-10-15 | 2012-10-15 | Toothed cylindrical piece for assembling and locking handlebar stand pipe and front fork stand pipe and manufacturing process for toothed cylindrical piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103884984A CN102874367A (en) | 2012-10-15 | 2012-10-15 | Toothed cylindrical piece for assembling and locking handlebar stand pipe and front fork stand pipe and manufacturing process for toothed cylindrical piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102874367A true CN102874367A (en) | 2013-01-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103884984A Pending CN102874367A (en) | 2012-10-15 | 2012-10-15 | Toothed cylindrical piece for assembling and locking handlebar stand pipe and front fork stand pipe and manufacturing process for toothed cylindrical piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102874367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967978A (en) * | 2019-04-17 | 2019-07-05 | 李祝东 | A kind of manufacture craft and structure of control one loudspeaker set vertical tube of front fork |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4113395A (en) * | 1975-05-01 | 1978-09-12 | Wald Manufacturing Company, Inc. | Bicycle stem and fork tube assembly |
| DE3025125A1 (en) * | 1980-07-03 | 1982-02-04 | E + W Gloerfeld GmbH & Co KG, 5880 Lüdenscheid | Stretcher wedge for fixing bicycle steering to forks - has wedges welded together with two cup pieces, and sawing diagonally across resulting cylinder |
| US5330302A (en) * | 1993-07-22 | 1994-07-19 | Kalloy Industrial Co., Ltd. | Wedge-nut assembly for fastening bicycle stem tube in steerer tube |
| CN2487645Y (en) * | 2001-02-26 | 2002-04-24 | 伊胜国际股份有限公司 | Wedge device for handlebar end of bicycle |
| CN202879718U (en) * | 2012-10-15 | 2013-04-17 | 昆山市友森精密机械有限公司 | Inclined nut used for assembling and locking of handlebar upright tube and front fork vertical tube |
-
2012
- 2012-10-15 CN CN2012103884984A patent/CN102874367A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4113395A (en) * | 1975-05-01 | 1978-09-12 | Wald Manufacturing Company, Inc. | Bicycle stem and fork tube assembly |
| DE3025125A1 (en) * | 1980-07-03 | 1982-02-04 | E + W Gloerfeld GmbH & Co KG, 5880 Lüdenscheid | Stretcher wedge for fixing bicycle steering to forks - has wedges welded together with two cup pieces, and sawing diagonally across resulting cylinder |
| US5330302A (en) * | 1993-07-22 | 1994-07-19 | Kalloy Industrial Co., Ltd. | Wedge-nut assembly for fastening bicycle stem tube in steerer tube |
| CN2487645Y (en) * | 2001-02-26 | 2002-04-24 | 伊胜国际股份有限公司 | Wedge device for handlebar end of bicycle |
| CN202879718U (en) * | 2012-10-15 | 2013-04-17 | 昆山市友森精密机械有限公司 | Inclined nut used for assembling and locking of handlebar upright tube and front fork vertical tube |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967978A (en) * | 2019-04-17 | 2019-07-05 | 李祝东 | A kind of manufacture craft and structure of control one loudspeaker set vertical tube of front fork |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130116 |