CN1121915C - Method for manufacturing tube with low wind resistance for saddle - Google Patents
Method for manufacturing tube with low wind resistance for saddle Download PDFInfo
- Publication number
- CN1121915C CN1121915C CN 00124732 CN00124732A CN1121915C CN 1121915 C CN1121915 C CN 1121915C CN 00124732 CN00124732 CN 00124732 CN 00124732 A CN00124732 A CN 00124732A CN 1121915 C CN1121915 C CN 1121915C
- Authority
- CN
- China
- Prior art keywords
- tube
- bench hassock
- saddle
- wind resistance
- low wind
- 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 present invention relates to a method for manufacturing saddle tubes with low wind resistance. In the method, metal is primarily and integrally pumped into a saddle tube with a teardrop cross section; a hollow insertion tube part is arranged at one side of the saddle tube; the adjacent insertion tube part is a hollow uploading part. The uploading part is aligned to the top end of the insertion tube part. After pumping formation, the lower semi section of the uploading part is cut slantways so that the lower part of the uploading part is shorter than the insertion tube part. The manufacture method achieves the purposes of simplicity, quickness, low cost, etc. for manufacturing the saddle tubes.
Description
Technical field
The present invention is a kind of manufacture method of tube with low wind resistance for saddle, refers to a kind ofly in the manufacturing field of bicycle saddle cushion standpipe especially, is directed to the method for making the non-circular section bench hassock tube.
Background technology
In the bench hassock tube of bicycle, a kind of bench hassock tube of making teardrop shaped or ellipticity non-circular section is arranged at present.As shown in Figure 4, it is to utilize the carbon fibre initial rinse material to place mould, via the moulding of interior pressure blowing pressurized, heated.Upper tube 41 cross sections of bench hassock tube 40 are tear shape, and upper tube 41 to one preseting lengths just constriction form the lower tube 43 of little caliber.Lower tube 43 sections then form circle, make the position of the external diameter convergent of 41,43 of upper and lower part pipes form a mitered portion 42 of tilting.Thus, utilize lower tube 43 plants of circular cross section to be fixed on the vehicle frame of bicycle, and upper tube 41 is exposed on the cycle frame, so just can pass through the streamline moulding of the tear drop shape section of bench hassock tube 40, make bench hassock tube 40 have the function that reduces windage.
Yet the integrated bench hassock tube 40 of above-mentioned this kind tradition has following several the problems that can not be ignored on making:
1. carbon fibre material manufacturing cost height, and manufacture process trouble is so the integrated bench hassock tube 40 of this kind has the too high problem of cost.
2. the tear shape section of the upper tube 41 of bench hassock tube 40, be not easy to fix for the holder of existing seat cushion, so the essential upper tube 41 tear drop shape sections that cooperate of holder form tear shape column, not only seat cushion is positioned difficulty on the bench hassock tube 40, has also increased the die sinking cost of holder.
Summary of the invention
The object of the present invention is to provide a kind of easily manufactured, with low cost low wind resistance for saddle pipe manufacturing method.
The technical solution of the utility model is to provide a kind of manufacture method of tube with low wind resistance for saddle, it is characterized in that may further comprise the steps:
The one cold-drawn becomes the isometrical bench hassock tube of non-circular section; Utilize the cold-drawn of metal one to become the isometrical bench hassock tube of non-circular section, and in the isometrical straight tube of this kind, establish the body of double tubular sealing chamber, and be provided with one between two sealing chambers every face;
Cutting forms intubate portion: bench hassock tube is positioned at the wherein lower semisection position of a sealing chamber, removes a part of pipe with cutting, makes the bench hassock tube Lower Half of another sealing chamber relatively, stays the intubate portion of simple circular outer diameter.
The manufacture method of aforesaid tube with low wind resistance for saddle is characterized in that:
Two sealing chambers of bench hassock tube are formed with the intubate portion with the big hollow hole of diameter, and adjacent intubate portion rear side has the portion that uploads in hole, triangle hollow angle, and make intubate portion and upload that formation extends in parallel between portion.
The manufacture method of aforesaid tube with low wind resistance for saddle is characterized in that:
The lockhole column that is provided with internal thread is all given prominence in madial wall with intubate portion by the portion that uploads of bench hassock tube.
By the above as can be known, the present invention utilizes the one-body molded straight tube-like bench hassock tube of metal, just can form the bench hassock tube of the low windage effect of tool again in the mode of cutting, and it is simple and easy rapidly to reach manufacturing really, reduces manufacturing cost, and the effect of material cost.
Description of drawings
Further specify technical characterictic of the present utility model and purpose below in conjunction with accompanying drawing.
Brief Description Of Drawings:
Fig. 1 is a manufacturing process schematic diagram of the present invention.
Fig. 2 is the three-dimensional appearance schematic sectional view of bench hassock tube finished product of the present invention.
Fig. 3 is a bench hassock tube of the present invention cut state schematic diagram when making.
Fig. 4 is the stereo appearance figure of traditional tear drop shape section bench hassock tube.
The specific embodiment
At first please cooperate referring to Fig. 1,2,3.The manufacturing of bench hassock tube 10 wherein of the present invention is may further comprise the steps:
Steps A:
The one cold-drawn becomes the isometrical bench hassock tube of non-circular section:
Utilize the cold-drawn of metal one to become the isometrical bench hassock tube 10 of non-circular section.With Fig. 1,2 is example, and bench hassock tube 10 is to form tear shape section, and is provided with the body of double tubular sealing chamber in the isometrical straight tube of this kind, and wherein the external diameter larger part is set as the intubate portion 11 with hollow hole 110.The outside of adjacent intubate portion 11 is extended with triangle and to be linked the portion that uploads 12 with hole, hollow angle 120, makes 12 formation of intubate portion 11 and the portion of uploading parallel, and is provided with a wall thickness every face 13 between hollow hole 110 and the hole, angle 120.Upload portion 12 and all give prominence to the lockhole column 111121 that is provided with internal thread in madial wall with intubate portion 11.
Step B:
Cutting forms intubate portion:
Be positioned at the lower semisection position of the portion of uploading 12 again in bench hassock tube 10, in the mode of sawing or turning, bench hassock tube 10 is uploaded the lower semisection position of portion 12, following section portion 122 of a part of pipe section of cutting sth. askew, shown in the imaginary line of Fig. 2, make the tear drop shape section be formed at the first half of bench hassock tube 10.Lower Half only stays the intubate portion 11 of simple circular outer diameter as shown in Fig. 1,2, finishes the manufacture method of the utility model tube with low wind resistance for saddle 10 with this.
When the bench hassock tube 10 that manufactures by said method is implemented to be assembled in bicycle, can utilize intubate portion 11 to be inserted in seat pipe 31 inboards of vehicle frame 30, bench hassock tube 10 utilizes the following holder 20 fastening locks of lockhole column 111,121 abutment pads to be affixed on, and uploads on the present relatively pipe 31 of portion 13.
Claims (3)
1. the manufacture method of a tube with low wind resistance for saddle is characterized in that: may further comprise the steps,
The one cold-drawn becomes the isometrical bench hassock tube of non-circular section; Utilize the cold-drawn of metal one to become the isometrical bench hassock tube of non-circular section, and in the isometrical straight tube of this kind, establish the body of double tubular sealing chamber, and be provided with one between two sealing chambers every face;
Cutting forms intubate portion: bench hassock tube is positioned at the wherein lower semisection position of a sealing chamber, removes a part of pipe with cutting, makes the bench hassock tube Lower Half of another sealing chamber relatively, stays the intubate portion of simple circular outer diameter.
2. the manufacture method of tube with low wind resistance for saddle according to claim 1, it is characterized in that: two sealing chambers of bench hassock tube wherein, be formed with intubate portion with the big hollow hole of diameter, adjacent intubate portion rear side has the portion that uploads in hole, triangle hollow angle, and makes intubate portion and upload to form between portion and extend in parallel.
3. the manufacture method of tube with low wind resistance for saddle according to claim 1 and 2 is characterized in that: wherein the portion that uploads of bench hassock tube with intubate portion all in the outstanding lockhole column that is provided with internal thread of madial wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00124732 CN1121915C (en) | 2000-09-12 | 2000-09-12 | Method for manufacturing tube with low wind resistance for saddle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00124732 CN1121915C (en) | 2000-09-12 | 2000-09-12 | Method for manufacturing tube with low wind resistance for saddle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1342534A CN1342534A (en) | 2002-04-03 |
| CN1121915C true CN1121915C (en) | 2003-09-24 |
Family
ID=4590622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00124732 Expired - Fee Related CN1121915C (en) | 2000-09-12 | 2000-09-12 | Method for manufacturing tube with low wind resistance for saddle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1121915C (en) |
-
2000
- 2000-09-12 CN CN 00124732 patent/CN1121915C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1342534A (en) | 2002-04-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 |