CN104097727A - Injection molding type plastic bicycle - Google Patents
Injection molding type plastic bicycle Download PDFInfo
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- CN104097727A CN104097727A CN201310120510.8A CN201310120510A CN104097727A CN 104097727 A CN104097727 A CN 104097727A CN 201310120510 A CN201310120510 A CN 201310120510A CN 104097727 A CN104097727 A CN 104097727A
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Abstract
The invention discloses an injection molding type plastic bicycle. A handlebar, a front fork and a frame are made of engineering plastics, and each part is formed through injection molding; a tubular component forming each part has an annular cross section, wall thickness is increased or reinforcing ribs are used in stressed two-end areas of each annular section, the problem that plastics replacing metal are low in rigidity and carrying capacity is solved, and the centroidal moment of inertia of each section in the stressed direction changes linearly along the length direction of the corresponding tubular component and is in equal-curve design. The bicycle is made of the engineering plastics, the whole bicycle is light in weight, the shape of the bicycle depends on an injection mold, the shapes of multiple concept bicycles are realized, and the rusting problem of the bicycle is avoided; the bicycle is integrally formed through injection molding, the manufacturing process is simple, the accuracy is easy to control, the productivity can be greatly improved, and the production cost is reduced; parts of the bicycle are manufactured through injection molding, raised ribs, grooves, connectors for installing accessories and the like are convenient to design, and the problem that accessories for the bicycle are easy to loosen after installation in the prior art is solved.
Description
Technical field
The present invention relates to bicycle field, be specifically related to a kind of injection molding type plastic bicycle.
Background technology
Use bicycle as the vehicle not only environmental protection but also health, common is metal bicycle processed in the market, uses metal as material, manufacturing procedure is more, use traditional turnning and milling plane grinding process, also need more auxiliary welding processs, manufacturing process is comparatively complicated.Be limited by addition the impact of the course of processing, bicycle configuration design is subject to severely restricts.In use also there is the problem of corrosion in the irony bicycle generally using at present, once corrosion causes bicycle safe greatly to reduce.
Aspect change bicycle material, there is in the market the bicycle that carbon fiber formula thermoset material is made, this processing technology is used carbon cloth to be wound around, then the mode of thermoset forming.The bicycle that adopts this technique to make, for meeting the variation of caliber requirement attractive in appearance in profile, needs in technique to adjust.This type bicycle is except material cost height, and cost of manufacture is also very high, only on some high-grade bicycles, uses at present.
In addition; patent CN 1245127A has protected material and injection molding process; but the material using only limits to known at that time material; can choice less; and do not point out how to solve the problem that plastics substitute rear rigidity and Lack of support; adopt general Shooting Technique to be unfavorable for that structure optimization and material make full use of, actual operation is not strong.
Summary of the invention
The object of the present invention is to provide a kind of injection molding type plastic bicycle, to solve, existing bicycle easy-to-rust, processed complex, cost of manufacture are high, the problem of plastic part rigidity and Lack of support.
Technical scheme of the present invention is:
Injection molding type plastic bicycle of the present invention, comprise the front fork being formed by connection pipe, handlebar and vehicle frame, described front fork, the connection pipe of handlebar and vehicle frame is engineering plastics, described engineering plastics are fiber-reinforced plastic, plastics in described fiber-reinforced plastic are selected polypropylene, polyethylene, polyvinylchloride, polymethyl methacrylate, polycarbonate, benzene alkene nitrile-butadiene-styrene, at least one in polyester terephthalate and polyamide, fiber is selected glass fibre, basalt fibre, carbon fiber, aramid fiber, at least one in polyster fibre and stainless steel fibre, the connection pipe of described formation front fork, handlebar and vehicle frame is ring section pipe.
The hollow bulb of described ring section pipe is provided with weighting material; Described weighting material is expanded material, light wood.
Described ring section is oval ring.
Not etc., and it is not larger than the ring section thickness of pipe that is positioned at minor axis two ends to be positioned at the ring section thickness of pipe at major axis two ends for the ring section thickness of pipe of described front fork.
The ring section thickness of pipe of described vehicle frame equates, and the ring section inside pipe wall that is positioned at major axis two ends is provided with reinforced rib.
The ring section thickness of pipe of described handlebar equates, and the ring section inside pipe wall that is positioned at minor axis two ends is provided with reinforced rib.
Described ring section centre of form moment of inertia is along ring pipe length direction linear change, the curved designs such as one-tenth.
The hollow bulb of described ring section adopts and melts core method aided injection mould, melts core after moulding.
Described front fork, handlebar and vehicle frame interconnect by metal insert, and metal insert is provided with the interface matching with Universal bicycle parts, front fork, handlebar and vehicle frame and metal insert integrated injection molding.
Aspect change bicycle material, there is in the market the bicycle that carbon fiber formula thermoset material is made, this processing technology is used carbon cloth to be wound around, then the mode of thermoset forming.The bicycle that adopts this technique to make, for meeting the variation of caliber requirement attractive in appearance in profile, needs in technique to adjust.This type bicycle is except material cost height, and cost of manufacture is also very high, only on some high-grade bicycles, uses at present.Because its raised ribs position is difficult to realize by winding, its annex often still adopts the mode of lock ring to fix, and long-term use still exists loosening problem.In addition, along with the application of up-to-date technology, the light equipments such as LED lamp, vehicle speed measurement and display equipment, attached suspension member etc. also will be applied to bicycle, and these new equipment need installation site, in existing bicycle, be difficult to solve the fixation problem of attendant equipment.The present invention adopts following proposal can effectively solve problems:
In the brake lever position of injection molding type plastic bicycle handlebar of the present invention, be provided with for connecting the stepping brake handle of brake lever and protrude muscle, protrude muscle and be provided with connecting screw hole.
In the place ahead of described handlebar central region, be provided with groove or the projection for light equipments such as mounted LED lamps.
Above described handlebar central region, be provided with for groove or the projection of the display equipments such as electronic display are installed.
On the support tube of described vehicle frame, be provided with for the frame tube portion raised ribs of kettle external member is installed, raised ribs is provided with connecting screw hole.
Beneficial effect of the present invention:
(1), the present invention adopts the structure that changes tubular section, increases stress area wall thickness or uses the mode of reinforced rib, solves to mould the rigidity come for steel band and the problem of Lack of support, guarantees its rigidity and bearing capacity, guaranteed its service life;
(2), tubular member of the present invention is the structure that hollow structure or inner filling with light material form, and by making the linear change of the moment of inertia in whole cross section, makes the curved designs such as each parts one-tenth, when reducing cost of manufacture, strengthened aesthetic;
(3), engineering plastics parts of the present invention are to be made by plastics or fiber-reinforced plastic, complete vehicle weight is light, can integrated injection molding, the profile of bicycle can determine by injection model, a lot of concept formula bicycle profiles are achieved; Whole manufacturing process is simple, and precision is controlled easily, can significantly boost productivity, and reduces production costs and bicycle does not exist the problem of corrosion.
(4), the present invention adopts injection moulding mode to make bicycle assembly parts, the configuration design of parts has very large alerting ability, convenient directly design raised ribs, groove etc., so that the interface of installation accessories to be provided, solved current bicycle accessory rear easily loosening problem be installed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1 folding bicycle.
Fig. 2 is the large parts dispersed texture schematic diagram of three in Fig. 1.
Fig. 3 is A-A cross-sectional view in Fig. 2.
Fig. 4 is B-B cross-sectional view in Fig. 2.
Fig. 5 is C-C cross-sectional view in Fig. 2.
Fig. 6 is the structural representation of the embodiment of the present invention 2 ordinary bicycles.
Fig. 7 is D-D cross-sectional view in Fig. 6.
Fig. 8 is the structural representation of the embodiment of the present invention 3 shock-absorbing bicycles.
Fig. 9 is the structural representation of the embodiment of the present invention 4 folding bicycles.
Figure 10 is brake lever Local map in Fig. 9.
Figure 11 is the structural representation of the embodiment of the present invention 5 shock-absorbing bicycles.
Figure 12 is fixing kettle parts Local map in Figure 11.
In figure: 1 is handlebar, 11 is handlebar and standpipe junction metal insert, 12 is the hand-held external member of handlebar, and 13 is handlebar transverse tube cross section, and 14 is handlebar transverse tube hollow part, 15 is main stress area reinforced rib, 16 is instrument display board groove, and 17 install groove for LED lamp, and 18 is that stepping brake is protruding muscle, 181 is metal nuts inserts, and 182 is brake lever parts;
2 is front fork shank, 21Wei front fork foot metal insert, and 22 is front fork shoulder portion metal insert, and 23 is the main stress area of shank, and 24 is front fork shank hollow part, and 25 is shank and spring connection inserting part, 26 is spring members;
3 is vehicle frame, 31 is folding position metal insert, 32 is gear position metal insert, 33 is vehicle frame trailing wheel retaining part metal insert, 34 is back seat standpipe place metal insert, 35 is frame-front fork sleeve pipe place metal insert, 36 is the inner reinforced rib in top tube place, 37 is reinforced rib in pipe cross-sectional plane, 38 is vehicle frame and spring connection inserting part, 39 is spring members, 3a is front frame, 3b is linking springs chassis frame, 3c is rear portion connecting vehicle frame, 3d is plastics vehicle frame folding position metal insert, 3e is frame tube portion raised ribs, 3f is kettle external member, 310 is metal insert,
4 is general standpipe, and 5 is general back seat standpipe, and 6 is sleeve pipe.
The specific embodiment
Injection molding type plastic bicycle of the present invention, comprise the front fork being formed by connection pipe, handlebar and the large parts of vehicle frame three, front fork, the connection pipe of handlebar and vehicle frame is engineering plastics, described engineering plastics are that fiber-reinforced plastic is as being the polyethylene of glass fibre enhancing, carbon fiber reinforced polymethyl methacrylate, the polyamide that aramid fiber strengthens, benzene alkene nitrile-butadiene-styrene that stainless steel fibre strengthens, the polycarbonate that basalt fibre strengthens, glass strengthens polyester terephthalate (as glass REINFORCED PET, fiber glass reinforced PBT etc.) or the fine polyester terephthalate (REINFORCED PET as fine in carbon or carbon fiber enhanced PBT) etc. that strengthens of carbon, such as 45% reinforced polyamide PA, its intensity can reach 206MPa, coordinates with suitable structure design, can meet the mechanical characteristics requirement of bicycle completely.The connection pipe of described formation front fork, handlebar and vehicle frame is oval ring variable-section tubular; At the hollow bulb of oval ring variable-section tubular, be provided with the weighting material of expanded material, light wood etc.; Not etc., and it is not larger than the ring section thickness of pipe that is positioned at minor axis two ends to be positioned at the ring section thickness of pipe at major axis two ends for the ring section thickness of pipe of front fork; The ring section thickness of pipe of vehicle frame equates, and the ring section inside pipe wall that is positioned at major axis two ends is provided with reinforced rib; The ring section thickness of pipe of handlebar equates, and the ring section inside pipe wall that is positioned at minor axis two ends is provided with reinforced rib; Described ring section is along ring pipe length direction centre of form moment of inertia linear change, the curved designs such as one-tenth; The hollow bulb of described ring section adopts and melts core method aided injection mould, melts core after moulding; Described front fork, handlebar and vehicle frame interconnect by metal insert, and metal insert is provided with the interface matching with Universal bicycle parts, front fork, handlebar and vehicle frame and metal insert integrated injection molding.
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
embodiment 1
See Fig. 1, a kind of injection molding type plastic folded bicycle, its handlebar 1, front fork shank 2, vehicle frame 3 all adopt engineering plastics.See Fig. 2, it is inner that the product that handlebar parts adopt expanded material to make is embedded in handlebar transverse tube, fill handlebar transverse tube hollow part 14, handlebar and standpipe junction metal insert 11 integrated injection moldings, for attractive in appearance, 13 one-tenth, cross section of handlebar transverse tube ellipticity, see Fig. 3, long axis direction is the fore-and-aft direction of car load, in order to meet force request, handlebar arranges main stress area reinforced rib 15 in upper and lower short-axis direction inner side, increase the load-carrying capacity of handlebar, specifically can carry out according to force request the wall thickness of design section and reinforced rib, transverse tube cross section centre of form moment of inertia reduces along centre to two ends linearity, the curved designs such as one-tenth.The product that front fork inside also adopts expanded material to make is embedded in shank central authorities, fill front fork shank hollow part 24, with front fork foot metal insert 21, front fork shoulder portion metal insert 22 integrated injection moldings, front fork shank is designed to flats, and major cross-sectional axis is along car body fore-and-aft direction, for increasing rigidity and the bearing capacity of shank, at the main stress area 23 of shank, increase wall thickness, see Fig. 4, shank centre of form moment of inertia reduces along shoulder Bu Zhi foot direction is linear, the curved designs such as one-tenth.Handlebar and front fork have been used the metal insert that can coordinate with general standpipe 4, sleeve pipe 6 etc., have improved the commonality of plastics handlebar and front fork.Foldable frame 3 is realized folder function at vehicle frame middle part with metal insert 31, take upper tube as example, and frame tube hollow region adopts melts core method aided injection mould, after vehicle frame moulding, melts core, its cross section increases the inner reinforced rib 36 in top tube place in main force part, see Fig. 5.Folded bicycle segmentation injection moulding, front frame is containing folding position metal insert 31, plastics vehicle frame 3, frame-front fork sleeve pipe place metal insert 35, three part integrated injection moldings; Rear portion vehicle frame is containing burst metal insert 31, plastics vehicle frame 3, gear position metal insert 32, vehicle frame trailing wheel retaining part metal insert 33, back seat standpipe place metal insert 34, five part integrated injection moldings.Back seat standpipe place metal insert 34 is supporting with general back seat standpipe 5, and whole vehicle frame has commonality.Engineering plastics select glass fiber enhanced nylon (polyamide PA) or the fine PA of enhancing of carbon to make, for example: the fiberglass reinforced PA 6, PA66, PA610, PA612, PA1212 or the PA1012 that adopt fiber content 10%-50%.Such as 45% reinforced polyamide PA, its intensity can reach 206MPa, coordinates with suitable structure design, can meet the mechanical characteristics requirement of bicycle completely.
embodiment 2
See Fig. 6, a kind of injection molding type ordinary bicycle, containing plastics handlebar 1, front fork 2, vehicle frame 3.See Fig. 7, its tubular part outward appearance adopts cylindric, and the inner reinforced rib that adopts increases its rigidity and bearing capacity.Adopt the fine enhancing of fiberglass reinforced PA or carbon PA to make, for example: adopt fine PA6, PA66, PA610, PA612, PA1212, the PA1012 of strengthening of 10%-40% carbon, adopt and melt the auxiliary hollow technique making of core.Handlebar and standpipe junction metal insert 11 integrated injection moldings, supporting with the hand-held external member 12 of handlebar.Front fork shank 2 and foot's metal insert 21, shoulder portion metal insert 22 integrated injection moldings.Vehicle frame 3 and gear position metal insert 32, trailing wheel position metal insert 33, back seat standpipe place metal insert 34 integrated injection moldings.Each metal insert and Universal bicycle accessory can support the use, as steel ball, gear, bearing.Three plastic components also can be used as general part and for other types bicycle.
embodiment 3
See Fig. 8, a kind of injection molding type shock-absorbing bicycle, its front fork component increases shank and spring connection inserting part 25 and spring members 26, and vehicle frame changes four kinds of parts into and forms: be front frame 3a, linking springs chassis frame 3b and rear portion connecting vehicle frame 3c.Front fork shank adopts and spring connection inserting part 25, foot's metal insert 21 integrated injection moldings.Front frame adopts frame-front fork sleeve pipe place metal insert 35, gear position metal insert 32, back seat standpipe place metal insert 34 and vehicle frame and spring connection inserting part 38 integrated injection moldings.Linking springs chassis frame 3b employing vehicle frame and spring connection inserting part 38, trailing wheel retaining part metal insert 33 integrated injection moldings.Rear portion connecting vehicle frame 3c adopts and gear place metal insert 32, trailing wheel retaining part metal insert 33 integrated injection moldings.The wall thickness cross sections such as each tubular part employing, engineering plastics select fiber glass reinforced PBT or carbon fiber enhanced PBT to make, for example: the carbon fiber enhanced PBT that adopts fiber content 20%-50% fiber glass reinforced PBT or employing fiber content 10%-40%.
embodiment 4
See Fig. 9, Figure 10, a kind of injection molding type plastic folded bicycle, its handlebar 1, front fork shank 2, vehicle frame 3 all use engineering plastics.Its handlebar parts are reserved instrument display board groove 16, LED lamp is installed groove 17, stepping brake protruding muscle 18, handlebar can be reserved these annex installation sites when design, and the metal handle of using is now difficult to directly reserved these positions, protrude Tong Guo the welding of muscle and so on, but welding increases processing step on the one hand, one side affects outward appearance.Use injection molding type plastics handlebar, these structures are integrated injection moulding with handlebar main body, do not increase post-production, can significantly improve fixed effect again.See Figure 10, the fixing circular boop using of general brake lever parts 182 directly connects the protrusion muscle 18 of design at bolt tightening place, limited the motion of all directions, and be fixed up brake lever position, has solved clamping force decline back brake loosening problem.Engineering plastics used select glass fiber enhanced nylon (polyamide PA) or the fine PA of enhancing of carbon to make, for example: the fiberglass reinforced PA 6, PA66, PA610, PA612, PA1212, the PA1012 that adopt fiber content 10%-50%.
embodiment 5
See Figure 11, a kind of injection molding type shock-absorbing bicycle, containing plastics handlebar 1, front fork, vehicle frame 3.See Fig. 4, it is made and adopts Shooting Technique.Adopt the fine PA of enhancing of fiberglass reinforced PA or carbon to make, for example: fine PA6, PA66, PA610, PA612, PA1212, the PA1012 of strengthening of carbon that adopts fiber content 10%-40%.See Figure 12, plastics vehicle frame is reserved the frame tube raised ribs 3e of portion, designs screw in raised ribs, and 3f coordinates with placement kettle external member.Adopt after the mode that directly designs protruding fixed position, raised ribs and vehicle frame integrated injection molding, integraty is good, even and destroy at extreme case lower convexity, do not affect the use of vehicle frame yet.It is material that each parts are used plastics, does not have the problem of corrosion.
Claims (13)
1. an injection molding type plastic bicycle, comprise the front fork being formed by connection pipe, handlebar and vehicle frame, it is characterized in that: described front fork, the connection pipe of handlebar and vehicle frame is engineering plastics, described engineering plastics are fiber-reinforced plastic, plastics in described fiber-reinforced plastic are selected polypropylene, polyethylene, polyvinylchloride, polymethyl methacrylate, polycarbonate, benzene alkene nitrile-butadiene-styrene, at least one in polyester terephthalate and polyamide, fiber is selected glass fibre, basalt fibre, carbon fiber, aramid fiber, at least one in polyster fibre and stainless steel fibre, the connection pipe of described formation front fork, handlebar and vehicle frame is ring section pipe.
2. a kind of injection molding type plastic bicycle according to claim 1, is characterized in that: the hollow bulb of described ring section pipe is provided with weighting material; Described weighting material is expanded material and/or light wood.
3. a kind of injection molding type plastic bicycle according to claim 1, is characterized in that: described ring section is oval ring.
4. a kind of injection molding type plastic bicycle according to claim 3, is characterized in that: not etc., and it is not larger than the ring section thickness of pipe that is positioned at minor axis two ends to be positioned at the ring section thickness of pipe at major axis two ends for the ring section thickness of pipe of described front fork.
5. a kind of injection molding type plastic bicycle according to claim 3, is characterized in that: the ring section thickness of pipe of described vehicle frame equates, and the ring section inside pipe wall that is positioned at major axis two ends is provided with reinforced rib.
6. a kind of injection molding type plastic bicycle according to claim 3, is characterized in that: the ring section thickness of pipe of described handlebar equates, and the ring section inside pipe wall that is positioned at minor axis two ends is provided with reinforced rib.
7. a kind of injection molding type plastic bicycle according to claim 1, is characterized in that: described ring section centre of form moment of inertia is along ring pipe length direction linear change.
8. a kind of injection molding type plastic bicycle according to claim 1, is characterized in that: the hollow bulb of described ring section adopts and melts core method aided injection mould, melts core after moulding.
9. according to a kind of injection molding type plastic bicycle described in any one in claim 1-8, it is characterized in that: described front fork, handlebar and vehicle frame interconnect by metal insert, metal insert is provided with the interface matching with Universal bicycle parts, front fork, handlebar and vehicle frame and metal insert integrated injection molding.
10. according to a kind of injection molding type plastic bicycle described in any one in claim 1-8, it is characterized in that: in the brake lever position of described handlebar, be provided with for connecting the stepping brake handle of brake lever and protrude muscle, protrude muscle and be provided with connecting screw hole.
11. according to a kind of injection molding type plastic bicycle described in any one in claim 1-8, it is characterized in that: in the place ahead of described handlebar central region, be provided with groove or the projection for light equipments such as mounted LED lamps.
12. according to a kind of injection molding type plastic bicycle described in any one in claim 1-8, it is characterized in that: above described handlebar central region, be provided with for groove or the projection of the display equipments such as electronic display are installed.
13. according to a kind of injection molding type plastic bicycle described in any one in claim 1-8, it is characterized in that: on the support tube of described vehicle frame, be provided with for the frame tube portion raised ribs of kettle external member is installed, raised ribs is provided with connecting screw hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310120510.8A CN104097727B (en) | 2013-04-09 | 2013-04-09 | A kind of injection molding type plastic bicycle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310120510.8A CN104097727B (en) | 2013-04-09 | 2013-04-09 | A kind of injection molding type plastic bicycle |
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| CN104097727B CN104097727B (en) | 2017-09-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106627913A (en) * | 2016-12-30 | 2017-05-10 | 天津福盛达运动器材有限公司 | Light and environment-friendly children bike |
| CN109952194A (en) * | 2016-09-15 | 2019-06-28 | 瑞恩4赛德私人有限公司 | Hybrid composite |
| WO2020048862A1 (en) * | 2018-09-05 | 2020-03-12 | Sabic Global Technologies B.V. | Bicycle frame |
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| CN201026980Y (en) * | 2007-02-16 | 2008-02-27 | 王景辉 | Shaped structure of handle of carbon fiber bicycle |
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| US4838569A (en) * | 1988-04-25 | 1989-06-13 | Ford Thomas R | Bicycle |
| CN1103370A (en) * | 1993-11-04 | 1995-06-07 | 哈尔滨飞机制造公司 | Bicycle frame with carbon fiber composite structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109952194A (en) * | 2016-09-15 | 2019-06-28 | 瑞恩4赛德私人有限公司 | Hybrid composite |
| CN106627913A (en) * | 2016-12-30 | 2017-05-10 | 天津福盛达运动器材有限公司 | Light and environment-friendly children bike |
| WO2020048862A1 (en) * | 2018-09-05 | 2020-03-12 | Sabic Global Technologies B.V. | Bicycle frame |
| US11273884B2 (en) | 2018-09-05 | 2022-03-15 | Sabic Global Technologies B.V. | Bicycle frame |
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| CN104097727B (en) | 2017-09-05 |
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