CN103921882A - Double-bridge type damping yoke leg formed by using single tube and machining method for double-bridge type damping yoke leg - Google Patents
Double-bridge type damping yoke leg formed by using single tube and machining method for double-bridge type damping yoke leg Download PDFInfo
- Publication number
- CN103921882A CN103921882A CN201410140573.4A CN201410140573A CN103921882A CN 103921882 A CN103921882 A CN 103921882A CN 201410140573 A CN201410140573 A CN 201410140573A CN 103921882 A CN103921882 A CN 103921882A
- Authority
- CN
- China
- Prior art keywords
- sections
- leg
- section
- fork
- bridge
- 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.)
- Pending
Links
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a double-bridge type damping yoke leg formed by using a single tube and a machining method for the double-bridge type damping yoke leg. The damping yoke leg is used for sequentially performing procedures such as tube bending, opening forming, extrusion forming, tube expanding, beating bending and notch flattening on the single metal tube, and consists of fork leg sections, bridge-shaped overlap joint sections and fork end sections, wherein the left fork leg section and the right fork leg section which are parallel to each other are machined and formed by using the procedure of tube bending; the two bridge-shaped overlap joint sections which are positioned on the tops of the fork leg sections are respectively opened towards the outer sides and are machined and formed by using procedures of opening forming and extrusion forming; the fork leg sections are connected to expanding portions of the bridge-shaped overlap joint sections and are machined and formed by using the procedure of tube expanding; and the fork end sections positioned on the bottoms of the fork leg sections are machined and formed by using procedures of beating bending and notch flattening. The damping yoke leg is machined and manufactured by using the single metal tube, and is novel in structure and unique in appearance; the strength of the damping yoke leg is ultrahigh due to the fact that the damping yoke leg has a double-arch bridge structure; the appearance of the damping yoke leg is attractive; the quality of a product is guaranteed; and moreover, costs of raw materials, the technology and the labor are greatly reduced.
Description
Technical field
The present invention relates to the shock mount fork leg for bicycle, specifically, relate to a kind of Double-bridge type damping crotch leg and job operation thereof.
Background technology
Bicycle or Electrical Bicycle are used shock-proof frame fork mostly because of road conditions.Especially in recent years domestic and international popular mountain bike, requires more and more highlyer to shock-absorbing front fork, require its intensity good, and rigidity is high, can bear the impulsive force on various road surfaces, field, reduces the probability of occurrence of the situations such as fracture, assurance product service life.
Shock-absorbing front fork is assembled by damping crotch leg and upper fork assembly, and the shock mount fork leg that in industry, producer is used at present is roughly divided into two classes: a class is formed by iron pipe, U-iron attaching parts and iron fork sheet Combination Welding, as depicted in figs. 1 and 2; Be specially the iron pipe of two predetermined lengths, its one end adds U-shaped iron attaching parts welding, and other end welding iron fork sheet is as breeches pipe end.The advantage of this series products is low price, but owing to needing multiposition welding, causes that cost of labor is high, outward appearance is coarse, low strength.Another kind of for using aluminum magnesium alloy raw material to form by the disposable casting of casting mould, as shown in Figure 3 and Figure 4.Although this series products outward appearance is comparatively smooth, complex process, single size can only be used single mold, causes cost higher, simultaneously because the low intensity that causes of Casting Parts density is low, the fracture situation happening occasionally after place in operation in the process of riding.
Summary of the invention
The present invention will solve is that existing bicycle shock-proof frame fork outward appearance is coarse, low strength, technical matters that cost is higher, a kind of Double-bridge type damping crotch leg and job operation thereof of single tube forming are provided, this damping crotch leg is processed into single metal pipe material, novel structure, moulding is unique, there is the formed superhigh intensity of two arch bridges, good looking appearance; Its job operation comprises successively bend pipe, groove, extruding, expander, bends, claps the techniques such as flat otch, more guarantees product design, and raw MAT'L, technique, cost of labor greatly reduce simultaneously.
In order to solve the problems of the technologies described above, the present invention is achieved by following technical scheme:
A Double-bridge type damping crotch leg for single tube forming, comprises by the integrated fork leg section of tubing, bridge shape overlap joint section, fork section;
Two described fork leg sections are symmetrical and be parallel to each other;
Two described bridge shape overlap sections are positioned at the top of two described fork leg sections and two described fork leg sections are interconnected, and two described bridge shape overlap joint sections open respectively laterally;
The part that described fork leg section is connected on described bridge shape overlap joint section is wide diameter portion;
Two described fork sections lay respectively at the bottom of two described fork leg sections, all have camber and otch.
Described tubing is a kind of in pipe, rectangular tube, oval pipe, D shape pipe or triangle tube.
A job operation for the Double-bridge type damping crotch leg of single tube forming, comprises the steps:
(1) by the metal pipe material of predetermined length by midway location bending, two fork leg sections that form U-shaped top section and be parallel to each other;
(2) described U-shaped top section is longitudinally cut, form two parts that separated by groove;
(3) the described U-shaped top section cutting is pushed to outside, both sides by groove place, form two bridge shapes overlap joint sections that open;
(4) part that described fork leg section is connected on to described bridge shape overlap joint section is carried out expander processing according to design model, forms wide diameter portion;
(5) by described fork leg section bottom according to the processing of bending of the radian of design model;
(6) part of being bended in described fork leg section bottom after processing is flattened otch processing according to design model, forms fork section.
The invention has the beneficial effects as follows:
(1) the present invention utilize metal pipe material via bend pipe, groove, extruding, expander, bend, clap the processes such as flat otch and form damping crotch leg, one-body molded, save soldered, and there is the bridge shape overlap joint section that former and later two open laterally, therefore there is stronger intensity.
(2) main forming process of the present invention does not relate to welding process, can avoid the problems such as the distortion skew, the not prison welding that cause because of welding processing error are solid, rough surface, and effectively Improving The Quality of Products, beautifies outward appearance.
(3) the present invention can utilize pipe length conversion processing different size, and with respect to the casting product of a casting mould of a size, cost greatly reduces, and avoids the low density defect of Casting Parts simultaneously, has increased intensity and the safety of product.
(4) the present invention, by single tube forming, effectively uses materials in the tube, reduces waste material, and low-carbon environment-friendly reduces manufacturing cost.
(5) the present invention can use the metal pipe material of any pipe tangent plane to process, and its moulding can be done polynary variation according to customer is required.
Accompanying drawing explanation
Fig. 1 is the front view of iron pipe welded type shock-absorbing front fork device of the prior art;
Fig. 2 is the lateral plan of iron pipe welded type shock-absorbing front fork device of the prior art;
Fig. 3 is the front view of aluminum magnesium alloy cast type shock-absorbing front fork device of the prior art;
Fig. 4 is the lateral plan of aluminum magnesium alloy cast type shock-absorbing front fork device of the prior art;
Fig. 5 is the front view of the Double-bridge type damping crotch leg of single tube forming provided by the present invention;
Fig. 6 is the lateral plan of the Double-bridge type damping crotch leg of single tube forming provided by the present invention;
Fig. 7 is the job operation schematic flow sheet of the Double-bridge type damping crotch leg of single tube forming;
Fig. 8 is as the structural representation of raw-material single tubing in job operation;
Fig. 9 is the front view of the rear finished product of bend pipe processing in job operation;
Figure 10 is the lateral plan of the rear finished product of bend pipe processing in job operation;
Figure 11 is the front view of the rear finished product of otch processing in job operation;
Figure 12 is the lateral plan of the rear finished product of otch processing in job operation;
Figure 13 is the front view of finished product after extrusion process in job operation;
Figure 14 is the lateral plan of finished product after extrusion process in job operation;
Figure 15 is the front view of the rear finished product of expander processing in job operation;
Figure 16 is the lateral plan of the rear finished product of expander processing in job operation;
Figure 17 bends in job operation to process the front view of rear finished product;
Figure 18 bends in job operation to process the lateral plan of rear finished product;
Figure 19 is the front view that damping crotch leg provided by the present invention forms shock-absorbing front fork device;
Figure 20 is the lateral plan that damping crotch leg provided by the present invention forms shock-absorbing front fork device.
In figure: 1, bridge shape overlap joint section; 2, wide diameter portion; 3, fork leg section; 4, fork section; 5, U-shaped top section; 6, groove.
The specific embodiment
For further understanding summary of the invention of the present invention, feature and effect, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
As shown in Figure 5 and Figure 6, the present embodiment discloses a kind of Double-bridge type damping crotch leg of single tube forming, mainly comprise two fork leg sections 3, two bridge shape overlap joint sections 1, two fork sections 4, fork leg section 3, bridge shape overlap joint section 1 and fork section 4 are integrated by tubing.
Two fork leg sections 3 are straight tube structure, are parallel to each other and symmetrically.The part that two fork leg sections 3 are connected on bridge shape overlap joint section 1 is wide diameter portion, and this wide diameter portion is pressed into lubricative axle sleeve during for finished product assembling, is beneficial to damping.
Two bridge shape overlap joint sections 1 are positioned at the top of two fork leg sections 3 and they are interconnected, former and later two bridge shape overlap joint sections 1 open with certain radian respectively laterally with the central axis of fork leg section 3, form " Y " font that opening reduces from top to bottom gradually.Bridge shape overlap joint section 1 is the mud guard of car front-wheel fixedly, improves the intensity of damping crotch leg simultaneously.Former and later two bridge shape overlap joint sections 1 are compared the bulk strength that single bridge architecture has increased damping crotch leg greatly, significantly reduce the probability that fork leg section 3 deforms in transportation and use procedure.
Two fork sections 4 lay respectively at the bottom of two fork leg sections 3, and fork section 4 has certain camber and becomes flat-shaped, to assemble with car front-wheel in a conventional manner.The least significant end of fork section 4 has otch, and this otch is for being connected and fixed by bolt and car front wheel spindle core place.
As shown in Figure 7, above-mentioned Double-bridge type damping crotch leg be by sequentially to single metal pipe material carry out bend pipe, cut groove, extrusion forming, expander, the job operation of bending, flattening otch makes, its concrete operation step is as follows:
As shown in Figure 8, prepare the metal pipe material of a predetermined length, this metal pipe material can be pipe, rectangular tube, oval pipe, D shape pipe, triangle tube etc.
As shown in Figure 9 and Figure 10, midway location bending by the metal pipe material of predetermined length by its length direction, form U-shaped top section 5 and two fork leg sections 3, U-shaped top section 5 links together two fork leg sections 3, and two fork leg sections 3 are parallel to each other and symmetrically.
As shown in Figure 11 and Figure 12, by U-shaped top section 5 straight line incision along the longitudinal, the position of incision is groove 6, forms two parts that separated by groove 6 simultaneously.Comparatively preferred operation is that U-shaped top section 5, along the incision of tube hub line, is formed to two symmetrical parts that separated by groove 6 simultaneously.
As shown in Figure 13 and Figure 14, the U-shaped top section 5 having cut is pushed to both sides outsides by groove place, form two bridge shapes overlap joint sections 1 that the central axis with fork leg section 3 outwards opens.Now, by lateral plan, can see that two bridge shape overlap joint sections 1 are " Y " font with fork leg section 3.
As shown in Figure 15 and Figure 16, two fork leg sections 3 are connected on to the part of bridge shape overlap joint section 1, according to the predetermined moulding of design, carry out expander processing, form respectively two wide diameter portions 2.
As shown in Figure 17 and Figure 18, by the bottom of two fork leg sections 3 according to the processing of bending of the radian of designed predetermined moulding.
Finally, the part that two fork leg sections 3 are bended after processing is flattened otch processing according to the predetermined moulding of design, forms fork section 4, forms final finished as shown in Figure 5 and Figure 6.
As shown in Figure 19 and Figure 20, the Double-bridge type damping crotch leg completing and upper fork assembly are fitted together, can form shock-absorbing front fork device.The main forming process of the Double-bridge type damping crotch leg of single tube forming of the present invention does not relate to welding process, there is integrated structure, flat appearance is attractive in appearance, Double-bridge type structure and avoid low density casting to increase product strength, product design significantly improves, and raw MAT'L, technique, cost of labor also greatly reduce simultaneously.
Although by reference to the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, can also make the concrete conversion of a lot of forms, within these all belong to protection scope of the present invention.
Claims (3)
1. a Double-bridge type damping crotch leg for single tube forming, is characterized in that, comprises by the integrated fork leg section of tubing, bridge shape overlap joint section, fork section;
Two described fork leg sections are symmetrical and be parallel to each other;
Two described bridge shape overlap sections are positioned at the top of two described fork leg sections and two described fork leg sections are interconnected, and two described bridge shape overlap joint sections open respectively laterally;
The part that described fork leg section is connected on described bridge shape overlap joint section is wide diameter portion;
Two described fork sections lay respectively at the bottom of two described fork leg sections, all have camber and otch.
2. the Double-bridge type damping crotch leg of a kind of single tube forming according to claim 1, is characterized in that, described tubing is a kind of in pipe, rectangular tube, oval pipe, D shape pipe or triangle tube.
3. a job operation for the Double-bridge type damping crotch leg of single tube forming, is characterized in that, comprises the steps:
(1) by the metal pipe material of predetermined length by midway location bending, two fork leg sections that form U-shaped top section and be parallel to each other;
(2) described U-shaped top section is longitudinally cut, form two parts that separated by groove;
(3) the described U-shaped top section cutting is pushed to outside, both sides by groove place, form two bridge shapes overlap joint sections that open;
(4) part that described fork leg section is connected on to described bridge shape overlap joint section is carried out expander processing according to design model, forms wide diameter portion;
(5) by described fork leg section bottom according to the processing of bending of the radian of design model;
(6) part of being bended in described fork leg section bottom after processing is flattened otch processing according to design model, forms fork section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140573.4A CN103921882A (en) | 2014-04-09 | 2014-04-09 | Double-bridge type damping yoke leg formed by using single tube and machining method for double-bridge type damping yoke leg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140573.4A CN103921882A (en) | 2014-04-09 | 2014-04-09 | Double-bridge type damping yoke leg formed by using single tube and machining method for double-bridge type damping yoke leg |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103921882A true CN103921882A (en) | 2014-07-16 |
Family
ID=51140337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410140573.4A Pending CN103921882A (en) | 2014-04-09 | 2014-04-09 | Double-bridge type damping yoke leg formed by using single tube and machining method for double-bridge type damping yoke leg |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103921882A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401437A (en) * | 2014-10-13 | 2015-03-11 | 天津市摩大金属制品有限公司 | U-shaped shock absorption fork leg formed by single pipeline and manufacturing method of U-shaped shock absorption fork leg |
| CN104477306A (en) * | 2014-12-12 | 2015-04-01 | 天津市摩大金属制品有限公司 | Upper fork structure of shock-absorbing front wheel fork and processing method of upper fork structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2883155Y (en) * | 2005-09-21 | 2007-03-28 | 林华正 | Integrated fork column |
| DE102009021525A1 (en) * | 2009-05-15 | 2010-11-18 | Zf Friedrichshafen Ag | Front wheel-suspension fork for motorcycle, has bridge part, and left and right fork bars connected with bridge part, where one bar has continuously adjustable damping element e.g. externally controllable adjustable damping valve |
| US20110187076A1 (en) * | 2010-02-01 | 2011-08-04 | Trek Bicycle Corporation | Bicycle Air Shock Assemblies With Tunable Suspension Performance |
| CN302071505S (en) * | 2012-04-06 | 2012-09-12 | 天津市摩大金属制品有限公司 | Bicycle shock-absorbing front fork integrated double bridge fork leg (Batman model) |
| CN203766991U (en) * | 2014-04-09 | 2014-08-13 | 天津市摩大金属制品有限公司 | Double-bridge type damping fork leg formed by single tube |
-
2014
- 2014-04-09 CN CN201410140573.4A patent/CN103921882A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2883155Y (en) * | 2005-09-21 | 2007-03-28 | 林华正 | Integrated fork column |
| DE102009021525A1 (en) * | 2009-05-15 | 2010-11-18 | Zf Friedrichshafen Ag | Front wheel-suspension fork for motorcycle, has bridge part, and left and right fork bars connected with bridge part, where one bar has continuously adjustable damping element e.g. externally controllable adjustable damping valve |
| US20110187076A1 (en) * | 2010-02-01 | 2011-08-04 | Trek Bicycle Corporation | Bicycle Air Shock Assemblies With Tunable Suspension Performance |
| CN302071505S (en) * | 2012-04-06 | 2012-09-12 | 天津市摩大金属制品有限公司 | Bicycle shock-absorbing front fork integrated double bridge fork leg (Batman model) |
| CN203766991U (en) * | 2014-04-09 | 2014-08-13 | 天津市摩大金属制品有限公司 | Double-bridge type damping fork leg formed by single tube |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401437A (en) * | 2014-10-13 | 2015-03-11 | 天津市摩大金属制品有限公司 | U-shaped shock absorption fork leg formed by single pipeline and manufacturing method of U-shaped shock absorption fork leg |
| CN104401437B (en) * | 2014-10-13 | 2017-02-01 | 天津市摩大金属制品有限公司 | U-shaped shock absorption fork leg formed by single pipeline and manufacturing method of U-shaped shock absorption fork leg |
| CN104477306A (en) * | 2014-12-12 | 2015-04-01 | 天津市摩大金属制品有限公司 | Upper fork structure of shock-absorbing front wheel fork and processing method of upper fork structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10300738B2 (en) | Method of manufacturing a cast alloy wheel | |
| US20220402324A1 (en) | Torque Rod for Vehicle Suspension | |
| US9168967B2 (en) | Frame unit for bicycle and method of manufacturing the same | |
| US9579709B2 (en) | Method for manufacturing bicycle front fork having wheel clamping base | |
| CN101879565A (en) | Manufacturing method of welded steel pipe-free integrally formed automobile transaxle housing | |
| CN104590383A (en) | Automobile body side wall reinforcing and protecting structure | |
| CN103921882A (en) | Double-bridge type damping yoke leg formed by using single tube and machining method for double-bridge type damping yoke leg | |
| CN203766991U (en) | Double-bridge type damping fork leg formed by single tube | |
| TWI474945B (en) | Manufacturing method for integrally formed bicycle fork made of aluminum alloy | |
| CN103447770B (en) | Method for manufacturing pipe clamp, pipe clamp and pipeline | |
| CN204250269U (en) | The U-shaped damping crotch leg of single tube forming | |
| CN104943788A (en) | Joint part | |
| CN104943789A (en) | Saddle type vehicle frame | |
| CN204567779U (en) | A kind of body side wall is strengthened and operator guards | |
| TWI542504B (en) | Method for manufacturing bicycle fork having wheel clamping base | |
| CN108454763A (en) | A kind of monoblock type bicycle frame structure | |
| CN104401437A (en) | U-shaped shock absorption fork leg formed by single pipeline and manufacturing method of U-shaped shock absorption fork leg | |
| CN105522052B (en) | The shaping centering method of pipe fitting torsion beam | |
| CN202091344U (en) | Automobile tie rod ball head | |
| CN204415639U (en) | A kind of cycle frame | |
| CN205113599U (en) | Preceding yoke and front fork | |
| TWI583593B (en) | Front fork and front fork | |
| TWI555665B (en) | The preparation method of the front fork and the method of making the fork | |
| TWM540787U (en) | Motorcycle frame | |
| CN201863961U (en) | Bicycle frame with seamless joggled joint piece structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140716 |
|
| WD01 | Invention patent application deemed withdrawn after publication |