CN102602489A - Integrally-formed front fork and manufacturing method thereof - Google Patents
Integrally-formed front fork and manufacturing method thereof Download PDFInfo
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- CN102602489A CN102602489A CN2012100882120A CN201210088212A CN102602489A CN 102602489 A CN102602489 A CN 102602489A CN 2012100882120 A CN2012100882120 A CN 2012100882120A CN 201210088212 A CN201210088212 A CN 201210088212A CN 102602489 A CN102602489 A CN 102602489A
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Abstract
The invention discloses an integrally-formed front fork and a manufacturing method. The integrally-formed front fork comprises a cylindrical turning pipe, a connecting portion and a front fork piece, and the turning pipe and the front fork piece are integrally formed at the upper end and the lower end of the connecting portion respectively. The manufacturing method of the integrally-formed front fork mainly includes steps of pipe reducing and molding and the like to process the front fork. Compared with the prior art, the integrally-formed front fork has higher strength, capability of meeting service requirements and bearing larger axial and turning impact during extreme motions. Meanwhile, the welding step is omitted in the manufacturing method, the manufacturing process of the front fork is simplified, assembling and material cost of the front fork is reduced and strength loss caused by welding can be avoided.
Description
Technical field
The present invention relates to the accessory of Kickboard Scooter, be specifically related to the method for making of a kind of Kickboard Scooter with one-body molded front fork and this one-body molded front fork.
Background technology
Front fork is the critical component of Kickboard Scooter, and it mainly is to be used to connect front-wheel pivot shaft and main body rack, and one side need be born the ground shock power that the front-wheel wheel shaft transmits; Also to bear the twisting resistance that produces when swing handle drives front-wheel steering on the other hand; Therefore, need front fork to have enough axially bending strength and anti-torsional strength, to satisfy operating needs; Especially the special-purpose Kickboard Scooter of some extreme sports has higher requirement of strength to front fork.
The front fork of existing Kickboard Scooter adopts the pole spar system to become usually; To satisfy requirement of strength; Such front fork structure has bigger weight usually, impacts for vehicle performance, though can select for use lighter material to make; But this improvement to material is very limited for reducing front fork weight.
Present stage, the front fork that also has is through steering tube and front fork sheet welding production being formed, specifically being; Make steering tube and front fork sheet respectively, then the front fork sheet is welded on the bottom of steering tube, this method need be assembled, weld each member; Its manufacturing process is comparatively complicated, and capacity rating is low, and cost of manufacture is higher; And have a weld seam between front fork sheet and the steering tube, when receiving bigger twisting resistance, this weld seam is difficult to bear bigger shearing force; During actual the use, front fork ruptures in the commissure easily.
Summary of the invention
To the deficiency of prior art, the object of the invention one is to provide a kind of one-body molded front fork, simplifies the manufacturing process of front fork, improves the production efficiency of front fork, and has higher intensity.
The object of the invention two is, a kind of method for making of front fork is provided, and to reduce the tooling cost of front fork, guarantees that simultaneously front fork has higher intensity.
For realizing above-mentioned purpose one, the present invention adopts following technical scheme:
One-body molded front fork comprises steering tube, connecting portion and the front fork sheet of cylindrical tube shape, and steering tube and front fork sheet are shaped in the upper/lower terminal of connecting portion respectively.
The front fork sheet is provided with axis hole.
The front fork sheet comprises square tube portion that the cross section is rectangle and opposedly holds two plate-like portions of both sides the square tube subordinate that the projection of circle on the square tube cross section that the steering tube cross-sectional plane is falls in the square tube cross section institute rectangularity.
Connecting portion is between steering tube and square tube portion, seamlessly transit round table-like.
For realizing above-mentioned purpose two, the present invention adopts following technical scheme:
The method for making of one-body molded front fork comprises:
Steps A, choose a pipe as raw MAT'L, the length of the length of this pipe and preparative treatment front fork is suitable;
Step B, circular tube external wall is pushed, the caliber with the part of front fork steering tube equal in length is diminished, pipe is processed into the up-small and down-big pipe reducer pipe of caliber, process the front fork crude green body;
Step C, the front fork crude green body is placed a mould,, make the bigger part of pipe reducer pipe caliber be shaped to square tube, process front fork base just via the hydraulic forming machine extruding;
Step D, the front fork communication port that cutting needs on the square tube of the first base of front fork, the square tube sidewall of front fork communication port both sides forms the front fork sheet, processes front fork.
In above-mentioned steps B; At first in the pipe tube chamber, insert a cylindric core rod; The internal diameter of the diameter of this cylindric core rod and front fork steering tube is suitable, utilizes plasticator to the pipe external pressure, and the length of pipe compression zone is equal to the axial length of front fork steering tube; Extruding detaches cylindric core rod after accomplishing.
In above-mentioned steps C; The die cavity of said mould is rectangular-shaped, in the tube chamber of the bigger part of pipe reducer pipe caliber, inserts a cuboid core rod, utilizes the outer wall of hydraulic forming machine extruding pipe reducer pipe caliber major part; Extruding detaches the cuboid core rod after accomplishing.
After step D, also need carry out following steps:
Step e, on the front fork sheet, process axis hole.
Beneficial effect of the present invention is:
Than prior art, the integrated front fork of the present invention has higher intensity, can satisfy operating needs, especially can bear produce in the extreme sport bigger axially and curve impact; Simultaneously, method of the present invention does not need welding step, has simplified front fork manufacturing process, has reduced the assembling and the material cost of front fork, and avoids welding the loss of strength that brings.
Description of drawings
Fig. 1 is the structural representation of the one-body molded front fork of the present invention;
Fig. 2-4 is the scheme drawing of front fork method for making of the present invention.
The specific embodiment
Below, in conjunction with the accompanying drawing and the specific embodiment, the present invention done further describing:
As shown in Figure 1; Be one-body molded front fork of the present invention; Comprise steering tube 1, connecting portion 2 and front fork sheet 3, steering tube 1 is cylindrical tube shape, and steering tube 1 and front fork sheet 3 are shaped in the upper/lower terminal of connecting portion 2 respectively; That is to say that steering tube 1, front fork sheet 3 and connecting portion 2 are integrated formed structures.Front fork sheet 3 comprises that two plate-like portions, 32, two plate-like portions 32 that are positioned at its top and connecting portion 2 bonded assembly square tube portions 31 and are positioned at square tube portion 31 both sides are opposed.The cross-sectional plane institute rectangularity area of square tube portion 31 that is to say greater than the circular area that steering tube 1 cross-sectional plane is become, and the projection of circle on square tube portion 31 cross-sectional planes that steering tube 1 cross-sectional plane is falls in the oblong that square tube portion 31 cross-sectional planes are become.Has the axis hole 33 that supplies the rotating shaft of Kickboard Scooter front-wheel to pass on the front fork sheet 3; This axis hole 33 runs through two plate-like portions 32; Have enough distances between two plate-like portions, 32 medial surfaces and supply the Kickboard Scooter front-wheel to install, therefore, also just require 1 cross-sectional plane institute of square tube portion rectangularity can have suitable length.
Above-mentioned connecting portion 2 is the section of seamlessly transitting between square tube portion 31 and the steering tube 1, and it is round table-like.
During assembling, two plate-like portions 32 lay respectively at the both sides of Kickboard Scooter front-wheel, and the front-wheel wheel shaft passes axis hole 33; Owing to adopt integrated formed structure; Remove the loss of intensity that welding brings from, form bigger shear strength at connecting portion 2 places, guarantee that whole front fork has higher working strength.
The method that the present invention makes above-mentioned one-body molded front fork may further comprise the steps:
Steps A, as shown in Figure 2 is chosen a pipe as raw MAT'L, and the length of the length of this pipe and preparative treatment front fork is suitable;
Can inwardly process a chamfered section by tube wall in the upper end of above-mentioned pipe, loose core with the step below convenient.
Step B, as shown in Figure 3 inserts a cylindric core rod in pipe tube chamber (i.e. A part in the diagram), the length that this cylindric core rod stretches in the pipe is d; Length d is equal to the length of the steering tube of preparative treatment front fork, utilizes plasticator to apply radial pressure in the outside that pipe inserts cylindric core rod position, the tube wall generation deformation of pipe compression zone (promptly by the downward development length d in top on the pipe position); And tube wall that should the place is under the effect of cylindric core rod and shape cavity wall plasticator; Caliber reduces, and wall thickness increases, so; Above-mentioned pipe is processed into a pipe reducer pipe that caliber is up-small and down-big, processes the front fork crude green body;
Step C, as shown in Figure 4 is processed into square tube with the bigger end in pipe reducer tube-in-tube footpath, specifically is; The front fork crude green body is placed a mould, and the shape chamber of this mould is rectangular-shaped, and in the tube chamber (i.e. B part in the diagram) of pipe reducer pipe caliber major part, inserts a cuboid core rod; Utilize the hydraulic forming machine extruding; Under the effect of mould shape cavity wall and cuboid core rod, the bigger part of pipe reducer pipe caliber is processed into square tube, process front fork base just;
Step D, the front fork communication port that cutting needs on the square tube of the first base of front fork, the square tube sidewall of front fork communication port both sides forms the front fork sheet;
Step e, on the front fork sheet drill axis hole.
Among the step B, when circular tube external wall was extruded, it was extruded portion and does not have extruded part joint generation deformation; The tube wall at this place is through once drawing; Thereby form the connecting portion of buffering transition, this connecting portion seamlessly transits, generally; Application force when needing the control pipe to be squeezed prevents to rupture at above-mentioned joint.
For a person skilled in the art, can make other various corresponding changes and distortion, and these all changes and distortion should belong within the protection domain of claim of the present invention all according to the technical scheme and the design of above description.
Claims (8)
1. one-body molded front fork is characterized in that, comprises steering tube, connecting portion and the front fork sheet of cylindrical tube shape, and steering tube and front fork sheet are shaped in the upper/lower terminal of connecting portion respectively.
2. one-body molded front fork as claimed in claim 1 is characterized in that the front fork sheet is provided with axis hole.
3. one-body molded front fork as claimed in claim 1; It is characterized in that; The front fork sheet comprises square tube portion and opposed two plate-like portions of holding both sides the square tube subordinate that the cross section is rectangle; The projection of circle on the square tube cross section that the steering tube cross-sectional plane is falls in the square tube cross section institute rectangularity.
4. one-body molded front fork as claimed in claim 3 is characterized in that, connecting portion is between steering tube and square tube portion, seamlessly transit round table-like.
5. the method for making of the described one-body molded front fork of claim 1 is characterized in that, comprising:
Steps A, choose a pipe as raw MAT'L, the length of the length of this pipe and preparative treatment front fork is suitable;
Step B, circular tube external wall is pushed, the caliber with the part of front fork steering tube equal in length is diminished, pipe is processed into the up-small and down-big pipe reducer pipe of caliber, process the front fork crude green body;
Step C, the front fork crude green body is placed a mould,, make the bigger part of pipe reducer pipe caliber be shaped to square tube, process front fork base just via the hydraulic forming machine extruding;
Step D, the front fork communication port that cutting needs on the square tube of the first base of front fork, the square tube sidewall of front fork communication port both sides forms the front fork sheet, processes front fork.
6. front fork method for making as claimed in claim 5 is characterized in that, among the step B; At first in the pipe tube chamber, insert a cylindric core rod; The internal diameter of the diameter of this cylindric core rod and front fork steering tube is suitable, utilizes plasticator to the pipe external pressure, and the length of pipe compression zone is equal to the axial length of front fork steering tube; Extruding detaches cylindric core rod after accomplishing.
7. front fork method for making as claimed in claim 5; It is characterized in that among the step C, the die cavity of said mould is rectangular-shaped; In the tube chamber of the bigger part of pipe reducer pipe caliber, insert a cuboid core rod; Utilize the outer wall of hydraulic forming machine extruding pipe reducer pipe caliber major part, extruding detaches the cuboid core rod after accomplishing.
8. front fork method for making as claimed in claim 5 is characterized in that, after step D, also need carry out following steps:
Step e, on the front fork sheet, process axis hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100882120A CN102602489A (en) | 2012-03-29 | 2012-03-29 | Integrally-formed front fork and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100882120A CN102602489A (en) | 2012-03-29 | 2012-03-29 | Integrally-formed front fork and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102602489A true CN102602489A (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100882120A Pending CN102602489A (en) | 2012-03-29 | 2012-03-29 | Integrally-formed front fork and manufacturing method thereof |
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| CN (1) | CN102602489A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813581A (en) * | 2012-08-30 | 2012-12-12 | 明达铝业科技(太仓)有限公司 | High-precision turning body for integrally processed medical wheelchair and processing method for high-precision turning body |
| TWI583593B (en) * | 2015-10-05 | 2017-05-21 | Front fork and front fork | |
| CN112693550A (en) * | 2021-01-25 | 2021-04-23 | 苏州诺雅电动车有限公司 | Single-tube hollow front fork and mounting method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11139378A (en) * | 1997-11-05 | 1999-05-25 | Mizuno Corp | Front fork for bicycle |
| CN1368412A (en) * | 2001-01-31 | 2002-09-11 | 本田技研工业株式会社 | Extruding forming method for tube with special-shaped section and mould for tube extruding forming |
| CN101032789A (en) * | 2006-03-06 | 2007-09-12 | 林志琴 | Forming method of pipe fittings |
| CN201026979Y (en) * | 2007-02-16 | 2008-02-27 | 王景辉 | Shaped structure of carbon fiber front fork and standpipe component of bicycle |
| EP1767447B1 (en) * | 2005-09-27 | 2008-06-25 | Yuan Min An Enterprise Co., Ltd. | Front fork for a bicycle |
| US20090056495A1 (en) * | 2007-08-27 | 2009-03-05 | Todd Bischoff | Bicycle handlebar assembly |
-
2012
- 2012-03-29 CN CN2012100882120A patent/CN102602489A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11139378A (en) * | 1997-11-05 | 1999-05-25 | Mizuno Corp | Front fork for bicycle |
| CN1368412A (en) * | 2001-01-31 | 2002-09-11 | 本田技研工业株式会社 | Extruding forming method for tube with special-shaped section and mould for tube extruding forming |
| EP1767447B1 (en) * | 2005-09-27 | 2008-06-25 | Yuan Min An Enterprise Co., Ltd. | Front fork for a bicycle |
| CN101032789A (en) * | 2006-03-06 | 2007-09-12 | 林志琴 | Forming method of pipe fittings |
| CN201026979Y (en) * | 2007-02-16 | 2008-02-27 | 王景辉 | Shaped structure of carbon fiber front fork and standpipe component of bicycle |
| US20090056495A1 (en) * | 2007-08-27 | 2009-03-05 | Todd Bischoff | Bicycle handlebar assembly |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813581A (en) * | 2012-08-30 | 2012-12-12 | 明达铝业科技(太仓)有限公司 | High-precision turning body for integrally processed medical wheelchair and processing method for high-precision turning body |
| CN102813581B (en) * | 2012-08-30 | 2014-12-24 | 明达铝业科技(太仓)有限公司 | High-precision turning body for integrally processed medical wheelchair and processing method for high-precision turning body |
| TWI583593B (en) * | 2015-10-05 | 2017-05-21 | Front fork and front fork | |
| CN112693550A (en) * | 2021-01-25 | 2021-04-23 | 苏州诺雅电动车有限公司 | Single-tube hollow front fork and mounting method |
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Application publication date: 20120725 |