CN104097727B - A kind of injection molding type plastic bicycle - Google Patents
A kind of injection molding type plastic bicycle Download PDFInfo
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- CN104097727B CN104097727B CN201310120510.8A CN201310120510A CN104097727B CN 104097727 B CN104097727 B CN 104097727B CN 201310120510 A CN201310120510 A CN 201310120510A CN 104097727 B CN104097727 B CN 104097727B
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Abstract
The invention discloses a kind of injection molding type plastic bicycle, handlebar, front fork, vehicle frame are material using engineering plastics, and each part uses injection molding;The cross section for constituting the tubular element of each part is annular, ring section increases wall thickness in the end regions of stress two or uses reinforcement, the problem of solving using rigidity after plastics alternative metals and not enough bearing capacity, section Impact direction centre of form the moment of inertia along tubular element length direction linear change, into etc. curved design.Utilizing works plastic manufacturing bicycle of the present invention, overall weight is light, and the profile of bicycle can be determined by injection model, is achieved many concept formula bicycle profiles and the problem of corrosion is not present for bicycle;Integrated injection molding, manufacturing process is simple, and precision controlling easily, can greatly improve productivity ratio, reduce production cost;Bicycle assembly parts, interface of convenient design raised ribs, groove and installation annex etc. are made using injection molding manner, the problem of easily being loosened after current bicycle accessory is installed is solved.
Description
Technical field
The present invention relates to bicycle art, and in particular to a kind of injection molding type plastic bicycle.
Background technology
It is common for metal bicycle in the market using bicycle as the vehicles not only environmental protection but also healthy, make
With metal as material, manufacturing procedure is more, digs grinding process using traditional turnning and milling, in addition it is also necessary to aid in some welding procedures, makes
Make process complex.The influence of process is limited by addition, and bicycle configuration design is by severely restricts.Generally make at present
The problem of also there is corrosion in use in irony bicycle, once corrosion is to cause bicycle safe to substantially reduce.
In terms of bicycle material is changed, occur the bicycle of carbon fiber formula thermosets making in the market, should
Processing technology is wound using carbon cloth, then thermoset forming mode.The bicycle made using this technique, to meet profile
Need to adjust in the change aesthetic of upper caliber, technique.The type bicycle is in addition to material cost is high, and cost of manufacture is also very
Height, is only used on some high-grade bicycles at present.
In addition, patent CN 1245127A protect material and injection molding process, but the material used is only limitted at that time may be used
The material known, optional leeway is smaller, and does not indicate how to solve after plastics are substituted rigidity and the problem of Lack of support,
Structure optimization is unfavorable for using general Shooting Technique and material makes full use of, actual operation is not strong.
The content of the invention
It is an object of the invention to provide a kind of injection molding type plastic bicycle, to solve existing bicycle easy-to-rust, processing
The problem of complicated, cost of manufacture height, plastic part rigidity and Lack of support.
The technical scheme is that:
The injection molding type plastic bicycle of the present invention, including front fork, handlebar and the vehicle frame being made up of connecting tube, the front fork,
The connecting tube of handlebar and vehicle frame is engineering plastics, during described engineering plastics are fibre reinforced plastics, the fibre reinforced plastics
Plastics select polypropylene, polyethylene, polyvinyl chloride, polymethyl methacrylate, makrolon, benzene alkene nitrile-butadiene-benzene
At least one of ethene, polyester terephthalate and polyamide, fiber select glass fibre, basalt fibre, carbon fiber, virtue
At least one of synthetic fibre fiber, polyester fiber and stainless steel fibre;The connecting tube for constituting front fork, handlebar and vehicle frame is annular
Variable-section tubular.
The hollow bulb of described ring section pipe is provided with filler;Described filler is expanded material, light wood.
Described ring section is oval ring.
The ring section thickness of pipe wall of the front fork, and it is located at the ring section thickness of pipe wall ratio at major axis two ends positioned at short axle
The ring section thickness of pipe wall at two ends is big.
The ring section thickness of pipe wall of the vehicle frame is equal, and the ring section inside pipe wall positioned at major axis two ends is provided with reinforcement
Muscle.
The ring section thickness of pipe wall of the handlebar is equal, and the ring section inside pipe wall positioned at short axle two ends is provided with and strengthened
Muscle.
Described ring section centre of form the moment of inertia along ring pipe length direction linear change, into etc. curved design.
The hollow bulb of described ring section melts core using core method aided injection mould is melted after shaping.
Described front fork, handlebar and vehicle frame is connected with each other by metal insert, and metal insert is provided with and Universal bicycle
The interface that part matches, front fork, handlebar and vehicle frame and metal insert integrated injection molding.
In terms of bicycle material is changed, occur the bicycle of carbon fiber formula thermosets making in the market, should
Processing technology is wound using carbon cloth, then thermoset forming mode.The bicycle made using this technique, to meet profile
Need to adjust in the change aesthetic of upper caliber, technique.The type bicycle is in addition to material cost is high, and cost of manufacture is also very
Height, is only used on some high-grade bicycles at present.Because its raised ribs position is difficult to be realized by winding, its annex is often still adopted
Fixed with the mode of lock ring, the problem of long-term use still has loosening.In addition, with the application of new technology, the illumination such as LED
Equipment, vehicle speed measurement and display device, attached suspension member etc. will also be applied to bicycle, and these new equipment need installation site,
In existing bicycle, it is difficult to solve the fixation problem of auxiliary device.And the present invention then can effectively solve this using following proposal
Class problem:
The stepping brake handle for being used for connecting brake lever is provided with the brake lever position of the injection molding type plastic bicycle handlebar of the present invention
Muscle is protruded, protrusion muscle is provided with connecting screw hole.
Being provided with the front of the handlebar central region is used for the groove or projection of the lighting apparatus such as mounted LED lamp.
The groove or projection for being used for installing the display devices such as electronic display are provided with the top of the handlebar central region.
The vehicle frame pipe portion raised ribs for being used for installing kettle external member are provided with the stand tube of the vehicle frame, raised ribs are provided with
Connecting screw hole.
Beneficial effects of the present invention:
(1), the present invention using change tubular section structure, increase stress area wall thickness or using reinforcement mode,
The problem of solving to mould the rigidity come for steel band and Lack of support, it is ensured that its rigidity and bearing capacity, it is ensured that its service life;
(2), the present invention tubular element for hollow structure or internal filling with light material composition structure, it is and whole by making
The linear change of the moment of inertia in individual section, make each part into etc. curved design, reduce cost of manufacture while, enhance effect attractive in appearance
Really;
(3), engineering plastics part of the present invention be made up of plastics or fibre reinforced plastics, complete vehicle weight is light, can integrally note
Type is moulded into, the profile of bicycle can be determined by injection model, many concept formula bicycle profiles are achieved;Whole manufacturing process
Simply, precision controlling easily, can greatly improve productivity ratio, reduce production cost and the problem of corrosion is not present in bicycle.
(4), the present invention bicycle assembly parts are made using injection molding manner, the configuration design of part has very big flexibility,
Convenient directly design raised ribs, groove etc., to provide the interface for installing annex, are solved after current bicycle accessory is installed easily
The problem of loosening.
Brief description of the drawings
Fig. 1 is the structural representation of the folding bicycle of the embodiment of the present invention 1.
Fig. 2 is three big part dispersed structure schematic diagrames in Fig. 1.
Fig. 3 is A-A cross-sectional views in Fig. 2.
Fig. 4 is B-B cross-sectional views in Fig. 2.
Fig. 5 is C-C cross-sectional views in Fig. 2.
Fig. 6 is the structural representation of the ordinary bicycle of the embodiment of the present invention 2.
Fig. 7 is D-D cross-sectional views in Fig. 6.
Fig. 8 is the structural representation of the shock-absorbing bicycle of the embodiment of the present invention 3.
Fig. 9 is the structural representation of the folding bicycle of the embodiment of the present invention 4.
Figure 10 is brake lever Local map in Fig. 9.
Figure 11 is the structural representation of the shock-absorbing bicycle of the embodiment of the present invention 5.
Figure 12 is to fix kettle part Local map in Figure 11.
In figure:1 is handlebar, and 11 be handlebar and standpipe junction metal insert, and 12 be the hand-held external member of handlebar, and 13 be that handlebar is horizontal
Tube section, 14 be handlebar transverse tube hollow part, and 15 be main stress area reinforcement, and 16 be instrument display board groove, and 17 be LED
Lamp installs groove, 18 be stepping brake protrusion muscle, 181 be metal nuts inserts, and 182 be brake lever part;
2 be fork leg, and 21 be front fork foot metal insert, and 22 be front fork shoulder portion metal insert, and 23 be that leg is main
Stress area, 24 be fork leg hollow part, and 25 be leg and spring connection inserting part, and 26 be spring members;
3 be vehicle frame, and 31 is fold position metal insert, and 32 be gear position metal insert, and 33 be vehicle frame trailing wheel clamping part
Position metal insert, 34 be back seat standpipe at metal insert, 35 be frame-front fork sleeve pipe at metal insert, 36 be top tube in
Portion's reinforcement, 37 be reinforcement in pipe cross section, and 38 be vehicle frame and spring connection inserting part, and 39 be spring members, and 3a is anterior car
Frame, 3b is connecting spring chassis frame, and 3c is rear portion connecting vehicle frame, and 3d is that plastic frame folds position metal insert, and 3e is vehicle frame
Pipe portion raised ribs, 3f is kettle external member, and 310 be metal insert;
4 be general standpipe, and 5 be general back seat standpipe, and 6 be sleeve pipe.
Embodiment
The injection molding type plastic bicycle of the present invention, including front fork, handlebar and the big part of vehicle frame three being made up of connecting tube, it is preceding
The connecting tube of fork, handlebar and vehicle frame is engineering plastics, and described engineering plastics are that fibre reinforced plastics such as can be glass fibre
Enhanced polyethylene, the polymethyl methacrylate of fibre reinforced, the enhanced polyamide of aramid fiber, stainless steel fibre enhancing
Benzene alkene nitrile-butadiene-styrene, the enhanced makrolon of basalt fibre, fiberglass reinforced polyester terephthalate(Such as glass
Fine REINFORCED PET, fiber glass reinforced PBT etc.)Or carbon fibre enhancing polyester terephthalate(Such as the fine REINFORCED PET of carbon or carbon fiber enhanced PBT)
Deng;Such as 45% reinforced polyamide PA, its intensity coordinates with suitable structure design up to 206MPa, is entirely capable of meeting bicycle
Mechanical property requirements.The connecting tube for constituting front fork, handlebar and vehicle frame is oval ring variable-section tubular;In oval ring section
The hollow bulb of pipe is provided with the filler of expanded material, light wood etc.;The ring section thickness of pipe wall of front fork, and positioned at length
The ring section thickness of pipe wall at axle two ends is bigger than the ring section thickness of pipe wall positioned at short axle two ends;The ring section thickness of pipe wall phase of vehicle frame
Deng, and the ring section inside pipe wall at major axis two ends is provided with reinforcement;The ring section thickness of pipe wall of handlebar is equal, and is located at
The ring section inside pipe wall at short axle two ends is provided with reinforcement;Described ring section is along ring pipe length direction centre of form the moment of inertia line
Property change, into etc. curved design;The hollow bulb of described ring section melts core using core method aided injection mould is melted after shaping;Institute
Front fork, handlebar and the vehicle frame stated are connected with each other by metal insert, and metal insert is provided with to match with Universal bicycle part
Interface, front fork, handlebar and vehicle frame and metal insert integrated injection molding.
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
See Fig. 1, a kind of injection molding type plastic folded bicycle, its handlebar 1, fork leg 2, vehicle frame 3 use engineering plastics.
See Fig. 2, the product that handlebar part is made using expanded material is embedded in inside handlebar transverse tube, filling handlebar transverse tube hollow part 14,
Handlebar and the integrated injection molding of standpipe junction metal insert 11, in order to attractive in appearance, Fig. 3 is seen in handlebar transverse tube section 13 into ellipticity,
Long axis direction is the fore-and-aft direction of vehicle, and in order to meet force request, handlebar sets main stress on the inside of short-axis direction up and down
Region reinforcement 15, increases the bearing capacity of handlebar, specifically can be horizontal according to force request come design section and the wall thickness of reinforcement
Tube section centre of form the moment of inertia along it is middle to two it is linear reduce, into etc. curved design.Also made inside front fork using expanded material
Product is embedded in leg center, filling fork leg hollow part 24, embedding with front fork foot metal insert 21, front fork shoulder portion metal
The integrated injection molding of part 22, fork leg is designed as flat, and major cross-sectional axis are along car body fore-and-aft direction, to increase the rigidity of leg
And bearing capacity, the main stress area 23 increase wall thickness in leg, see Fig. 4, leg centre of form the moment of inertia is along shoulder portion to foot direction
Linear reduction, into etc. curved design.Handlebar and front fork have used metal insert that can be with the cooperation such as general standpipe 4, sleeve pipe 6, improve
The versatility of plastics handlebar and front fork.Foldable frame 3 realizes folder function in the middle part of vehicle frame using metal insert 31, with
Exemplified by upper tube, frame tube hollow region melts core using core method aided injection mould is melted after vehicle frame shaping, its section mainly by
Internal stiffeners 36 at power position increase top tube, are shown in Fig. 5.Folded bicycle segmentation injection, front frame position metal containing folding
Inserts 31, plastic frame 3, metal insert 35, three part integrated injection moldings at frame-front fork sleeve pipe;Rear frame contains burst
Metal insert 31, plastic frame 3, gear position metal insert 32, vehicle frame trailing wheel retaining part metal insert 33, at back seat standpipe
Metal insert 34, five part integrated injection moldings.Metal insert 34 and general back seat standpipe 5 are supporting at back seat standpipe, whole car
Frame has versatility.Engineering plastics select glass fiber enhanced nylon(Polyamide PA)Or carbon fibre enhancing PA is made, for example:Using fiber
Content 10%-50% fiberglass reinforced PA 6, PA66, PA610, PA612, PA1212 or PA1012.Such as 45% reinforced polyamide PA,
Its intensity coordinates with suitable structure design up to 206MPa, is entirely capable of meeting the mechanical property requirements of bicycle.
Embodiment 2
See Fig. 6, a kind of injection molding type ordinary bicycle, handlebar containing plastics 1, front fork 2, vehicle frame 3.Fig. 7 is seen, outside its tubular part
See using cylindric, it is internal that its rigidity and bearing capacity are increased using reinforcement.It is made of fiberglass reinforced PA or carbon fibre enhancing PA,
For example:Using 10%-40% carbon fibre enhancing PA6, PA66, PA610, PA612, PA1212, PA1012, using melt core auxiliary it is hollow
Technique makes.Handlebar and the integrated injection molding of standpipe junction metal insert 11, it is supporting with handlebar hand-held external member 12.Fork leg
2 with foot's metal insert 21, the integrated injection molding of shoulder portion metal insert 22.Vehicle frame 3 and gear position metal insert 32, trailing wheel
The integrated injection molding of metal insert 34 at position metal insert 33, back seat standpipe.Each metal insert can with Universal bicycle accessory
Support the use, such as steel ball, gear, bearing.Three plastic components can also be used for other types bicycle as general part.
Embodiment 3
See Fig. 8, a kind of injection molding type shock-absorbing bicycle, its front fork component increase leg and spring connection inserting part 25 and spring
Part 26, vehicle frame is changed to four kinds of part compositions:For front frame 3a, connecting spring chassis frame 3b and rear portion connecting vehicle frame 3c.Front fork
Leg is used and spring connection inserting part 25, the integrated injection molding of foot's metal insert 21.Front frame is using gold at frame-front fork sleeve pipe
Belong to inserts 35, gear position metal insert 32, metal insert 34 and vehicle frame and the one note of spring connection inserting part 38 at back seat standpipe
It is moulded into type.Connecting spring chassis frame 3b is noted using vehicle frame with spring connection inserting part 38, the one of trailing wheel retaining part metal insert 33
It is moulded into type.Rear portion connecting vehicle frame 3c use with metal insert at gear 32, the integrated injection molding of trailing wheel retaining part metal insert 33 into
Type.The wall thickness sections such as each tubular part use, engineering plastics are made from fiber glass reinforced PBT or carbon fiber enhanced PBT, for example:Adopt
With fiber content 20%-50% fiber glass reinforced PBTs or using fiber content 10%-40% carbon fiber enhanced PBT.
Embodiment 4
See Fig. 9, Figure 10, a kind of injection molding type plastic folded bicycle, its handlebar 1, fork leg 2, vehicle frame 3 use engineering
Plastics.Its handlebar part reserves instrument display board groove 16, LED and installs groove 17, stepping brake protrusion muscle 18, and handlebar is being set
Timing can reserve these annex installation sites, and the metal handle used now is difficult these directly reserved positions, protrude muscle
Etc can by welding, but welding on the one hand increase processing step, on the one hand influence outward appearance.Using injection molding type plastics handlebar,
These structures are integrated injection with handlebar main body, i.e., do not increase post-production, and fixed effect can be significantly improved again.See Figure 10, lead to
The protrusion muscle 18 that the circular boop used is directly connected to design at the bolt place of tightening is fixed with brake lever part 182, all directions are limited
Motion, brake lever position is to be fixed up, solve clamping force decline back brake loosen the problem of.Engineering plastics used select glass
Fiber enhanced nylon(Polyamide PA)Or carbon fibre enhancing PA is made, for example:Using fiber content 10%-50% fiberglass reinforced PA 6,
PA66、PA610、PA612、PA1212、PA1012。
Embodiment 5
See Figure 11, a kind of injection molding type shock-absorbing bicycle, handlebar containing plastics 1, front fork, vehicle frame 3.See Fig. 4, it is made using note
Modeling technique.It is made of fiberglass reinforced PA or carbon fibre enhancing PA, for example:Using fiber content 10%-40% carbon fibre enhancing PA6,
PA66、PA610、PA612、PA1212、PA1012.See Figure 12, plastic frame is reserved to be set in vehicle frame pipe portion raised ribs 3e, raised ribs
Screw is counted, is coordinated with placing kettle external member 3f.After directly designing by the way of raised fixed position, raised ribs and vehicle frame one
Injection, integrality is good, and is destroyed even in extreme case lower convexity, nor affects on the use of vehicle frame.Each part is used
Plastics are material, the problem of in the absence of corrosion.
Claims (11)
1. a kind of injection molding type plastic bicycle, including front fork, handlebar and the vehicle frame being made up of connecting tube, it is characterised in that:It is described
The connecting tube of front fork, handlebar and vehicle frame is engineering plastics, and described engineering plastics are fibre reinforced plastics, the fiber reinforcement plastic
Plastics in material select polypropylene, polyethylene, polyvinyl chloride, polymethyl methacrylate, makrolon, benzene alkene nitrile-fourth two
At least one of alkene-styrene, polyester terephthalate and polyamide, fiber select glass fibre, basalt fibre, carbon
At least one of fiber, aramid fiber, polyester fiber and stainless steel fibre;The connection for constituting front fork, handlebar and vehicle frame
Manage and managed for ring section;Described ring section is oval ring;Described front fork, handlebar and vehicle frame are mutual by metal insert
Connection, metal insert is provided with the interface matched with Universal bicycle part, front fork, handlebar and vehicle frame and metal insert one
Injection molding.
2. a kind of injection molding type plastic bicycle according to claim 1, it is characterised in that:In described ring section pipe
Empty portion is provided with filler;Described filler is expanded material and/or light wood.
3. a kind of injection molding type plastic bicycle according to claim 1, it is characterised in that:The ring section pipe of the front fork
Wall thickness, and the ring section thickness of pipe wall positioned at major axis two ends is bigger than the ring section thickness of pipe wall positioned at short axle two ends.
4. a kind of injection molding type plastic bicycle according to claim 1, it is characterised in that:The ring section pipe of the vehicle frame
Wall thickness is equal, and the ring section inside pipe wall positioned at major axis two ends is provided with reinforcement.
5. a kind of injection molding type plastic bicycle according to claim 1, it is characterised in that:The ring section pipe of the handlebar
Wall thickness is equal, and the ring section inside pipe wall positioned at short axle two ends is provided with reinforcement.
6. a kind of injection molding type plastic bicycle according to claim 1, it is characterised in that:The described ring section centre of form is used to
Property square is along ring pipe length direction linear change.
7. a kind of injection molding type plastic bicycle according to claim 1, it is characterised in that:Described ring section it is hollow
Melt core after shaping using core method aided injection mould is melted in portion.
8. a kind of injection molding type plastic bicycle according to any one of claim 1-7, it is characterised in that:In the handlebar
Brake lever position at be provided with and be used to connect the stepping brake of brake lever protrusion muscle, protrusion muscle is provided with connecting screw hole.
9. a kind of injection molding type plastic bicycle according to any one of claim 1-7, it is characterised in that:In the handlebar
The front of central region, which is provided with, is used for the groove or projection of the lighting apparatus such as mounted LED lamp.
10. a kind of injection molding type plastic bicycle according to any one of claim 1-7, it is characterised in that:In the car
The top of central region is provided with the groove or projection for being used for installing the display devices such as electronic display.
11. a kind of injection molding type plastic bicycle according to any one of claim 1-7, it is characterised in that:In the car
The stand tube of frame is provided with the vehicle frame pipe portion raised ribs for being used for installing kettle external member, and raised ribs are provided with connecting screw hole.
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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 true CN104097727B (en) | 2017-09-05 |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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BE1024565B1 (en) * | 2016-09-15 | 2018-04-17 | Rein4Ced Besloten Vennootschap Met Beperkte Aansprakelijkheid | 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 |
US11273884B2 (en) | 2018-09-05 | 2022-03-15 | Sabic Global Technologies B.V. | Bicycle frame |
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CN1400249A (en) * | 2001-08-01 | 2003-03-05 | 上海杰事杰新材料股份有限公司 | High-toughness glass fibre reinforced poly carbonate composite |
CN2541301Y (en) * | 2002-04-04 | 2003-03-26 | 上海宝麒自行车有限公司 | Bicycle stand made of composite material |
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 |
CN2324045Y (en) * | 1998-05-08 | 1999-06-16 | 于耀庆 | Carbon glass fibers bicycle |
CN2335880Y (en) * | 1998-08-07 | 1999-09-01 | 清华大学 | Mixed controlled light motor-driven cycle |
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