CN206501959U - A kind of attachment structure of bamboo bicycle rack - Google Patents
A kind of attachment structure of bamboo bicycle rack Download PDFInfo
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- CN206501959U CN206501959U CN201621253337.4U CN201621253337U CN206501959U CN 206501959 U CN206501959 U CN 206501959U CN 201621253337 U CN201621253337 U CN 201621253337U CN 206501959 U CN206501959 U CN 206501959U
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- metal
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- outer pipe
- bamboo trunk
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Abstract
The utility model discloses attachment structure and the connection method of a kind of bamboo bicycle rack, for realizing the connection between metal connecting piece and bamboo trunk.The attachment structure includes metal outer pipe, metal inner lining pipe, stress release ring, connection ring and structure glue；Wherein, the metal outer pipe and the metal inner lining pipe pass through structure glue sticking with the outer surface of the bamboo trunk and inner surface respectively；The outer surface of the connection ring and inner surface pass through structure glue sticking with the metal outer pipe, the metal inner lining pipe respectively；The stress release ring is located at the metal outer pipe original position Nian Jie with the bamboo trunk, passes through structure glue sticking with the inner surface of the metal outer pipe and the outer surface of the bamboo trunk respectively.By the attachment structure in the utility model and connection method, the stress concentration phenomenon of bamboo trunk in bamboo bicycle rack is significantly reduced, the security and durability of bamboo bicycle is finally improved.
Description
Technical field
The utility model is related to the technical field of bamboo bicycle rack, more particularly to bamboo bicycle rack metal tube, bamboo trunk
Between attachment structure, and its manufacturing process flow.
Background technology
Bicycle is a kind of traditional, instrument of easily going on a journey, and the daily life given people offers convenience.But bicycle
Main material is metal material, such as steel, aluminium alloy, is high energy consumption material.With the enhancing of people's environmental consciousness, bamboo
Bicycle processed is progressed into the life of people, and bamboo wood is liked due to its superior mechanical property and aesthetic property by people.
At present, the processing technology of bamboo wood has had the development advanced by leaps and bounds, by discongesting, drying, impregnation, the work such as compacting
Sequence, can obtain performance consistent and stable Recombined bamboo or bamboo cord wood, can be processed into not using Recombined bamboo or bamboo cord wood
The bamboo trunk of same specification, using with every field.
The main force structure of bicycle is vehicle frame, and body frame structure for automotive is mainly pipe fitting and form is simpler, therefore, bamboo wood master
It is used to substitute the pipe fitting such as upper pipe, down tube, standpipe of cycle frame position, but still needs gold in the junction of bicycle rack
Category pipe fitting is attached, in order to be attached with the other parts of bicycle.
The mechanics feature of bamboo wood is that density is small, and the intensity of machine direction is big, modulus is high, but perpendicular to the intensity of machine direction
Small, modulus is low.Relative to metal material, the intensity of bamboo wood is small, modulus is low, and case hardness is low, therefore bamboo wood is connected with metal
When connecing, link position easily produces stress concentration, and ultimately causes fracture or the cracking of bamboo wood.In existing bamboo bicycle rack, greatly
Part does not carry out Optimal Structure Designing, cause the durability of bamboo bicycle rack to have a greatly reduced quality, have by bamboo cycle frame
The metal outer pipe and metal inner lining pipe of metal connecting piece are welded as a whole, but because this welding procedure difficulty is higher, and do not have
Be prevented effectively from bamboo wood stress concentration, it is with high costs to ultimately cause bamboo bicycle, and structure is unreliable, largely reducing it is bamboo from
Driving advantage, is unfavorable for the popularization of this environment-friendly products of bamboo bicycle.
The content of the invention
The purpose of this utility model is to provide a kind of attachment structure of bamboo bicycle rack, the gold for realizing bamboo bicycle rack
Belong to the connection between connector and bamboo trunk.
According to one side of the present utility model, there is provided a kind of attachment structure of bamboo bicycle rack, the attachment structure bag
Include metal outer pipe, metal inner lining pipe, stress release ring, connection ring and structure glue；
Wherein, the metal outer pipe and the metal inner lining pipe pass through knot with the outer surface of the bamboo trunk and inner surface respectively
Structure glue sticking；The outer surface of the connection ring and inner surface pass through structure with the metal outer pipe, the metal inner lining pipe respectively
Glue sticking；The stress release ring is located at the metal outer pipe original position Nian Jie with the bamboo trunk, respectively with the gold
The outer surface of the inner surface and the bamboo trunk that belong to outer tube passes through structure glue sticking.
According to other side of the present utility model, there is provided between the metal connecting piece in a kind of bamboo bicycle rack and bamboo trunk
Connection method, this method includes：
(1) by the end (position Nian Jie with metal connecting piece needs) of bamboo trunk, by mach mode, by its wall thickness
Reduce 0.5~0.8mm, decreasing value is consistent with the wall thickness of stress release ring.Bamboo trunk end machining length is not less than its external diameter；
(2) position for contacting stress release ring with bamboo trunk applies structure glue, then be bonded with bamboo trunk progress, stress release ring
Length be not less than 2 times of metal outer pipe wall thickness；
(3) position for contacting metal inner lining pipe with bamboo trunk applies structure glue, then be bonded with bamboo trunk progress, and bonding length is not
Less than 2 times of bamboo trunk external diameter；
(4) position for contacting connection ring with bamboo trunk, metal inner lining pipe applies structure glue, then with bamboo trunk, metal inner lining pipe
It is bonded, the connection ring length Nian Jie with metal inner lining pipe is not less than 2 times of metal outer pipe wall thickness；
(5) the bamboo trunk surface between connection ring, the outer surface of stress release ring, and connection ring, stress release ring is applied
Structure glue；
(6) part for completing above-mentioned steps is integrally inserted in metal outer pipe, and proof stress release ring is stretched out outside metal
The length of pipe is not less than the wall thickness of metal outer pipe, and metal inner lining pipe stretches out external diameter of the length not less than bamboo trunk of metal outer pipe；
(7) the bamboo bicycle rack that above-mentioned steps are completed is fixed and carries out high temperature post cure, 50 °~70 ° of temperature range is high
Warm rear curing time is not less than 6 hours.
By the attachment structure in the utility model and connection method, significantly reduce bamboo trunk in bamboo bicycle rack should
Power concentration phenomenon, finally improves the security and durability of bamboo bicycle.In addition, the structure type of the attachment structure is simple,
Processing cost is low, and economic benefit is obvious.
Brief description of the drawings
By the description section carried out referring to the drawings hereinafter, all features described above can be better understood from, it is described
Accompanying drawing is：
Fig. 1 is bamboo bicycle rack schematic diagram in the utility model, wherein 1 is bamboo trunk, 2 be metal connecting piece, and A connects for metal
One junction of fitting 2 and bamboo trunk 1；
Fig. 2 is the cross-sectional detail schematic diagram of metal connecting piece 2 and a junction A of bamboo trunk 1 in the utility model, and 1 is bamboo
Pipe, 2 be metal connecting piece, and 3 be metal inner lining pipe, and 4 be metal outer pipe, and 5 be connection ring, and 6 be stress release ring, and 7 be structure
Glue；
Fig. 3 be the utility model in bamboo trunk 1, the detail view of metal outer pipe 4, wherein D be the external diameter of bamboo trunk 1, h1 be bamboo trunk 1 with
The length that metal outer pipe 4 is bonded, t1 is the wall thickness of metal outer pipe；
Fig. 4 is bamboo trunk 1 and the Nian Jie schematic diagram of stress release ring 6 in the utility model, and h2 is the length of stress release ring；
Fig. 5 is bamboo trunk 1 and the Nian Jie schematic diagram of metal inner lining pipe 3 in the utility model, and h3 is bamboo trunk 1 and metal inner lining pipe 3
Bonding length；
Fig. 6 is metal inner lining pipe 3 and the Nian Jie schematic diagram of connection ring 5 in the utility model, and h4 is metal inner lining pipe 3 with being connected
The bonding length of ring 5；
Fig. 7 is the painting schematic diagram of structure glue 7 in the surface of bamboo trunk 1 in the utility model；
Fig. 8 is bamboo trunk 1 and the connection diagram of metal connecting piece 2 in the utility model, and h5 stress releases ring 6 is stretched out outside metal
The length of pipe 4, h6 is the length that metal inner lining pipe 3 stretches out metal outer pipe 4；
When Fig. 9 carries out loading experiment for bamboo bicycle rack in the utility model, stress suffered by bamboo trunk 1 and metal inner lining pipe 3
The relation stretched out between the length (n times of the external diameter of bamboo trunk 1) of metal outer pipe 4；
When Figure 10 carries out loading experiment for bamboo bicycle rack in the utility model, stress suffered by bamboo trunk 1 and stress release ring 6
The relation stretched out between the length (n times of the wall thickness of metal outer pipe 4) of metal outer pipe 4.
Embodiment
The pipe fitting that bamboo bicycle refers generally in bicycle rack uses bamboo wood, and most of bamboo bicycle uses primary bamboo and glass
Glass fiber (carbon fiber) makes, and is to make by hand, therefore causes the poor uniformity of product, poor performance, cost high, and can not
Batch production.
In order to solve, bamboo bicycle industry degree is low, the inferior position that cost is high, the bamboo bicycle involved by the utility model
Frame is made up of bamboo trunk 1, metal connecting piece 2.The major function of metal connecting piece 2 is that bamboo trunk 1 is connected as into entirety, and with voluntarily
The parts such as Chinese herbaceous peony fork, pedal, trailing wheel, vehicle seat are connected, and stress is more complicated.Bamboo trunk 1 is rod member, is primarily subjected to stretch, compresses, curved
The simple stress form such as song.The material of metal connecting piece 2 is low-density alloy material, and such as aluminium alloy or titanium alloy, its material are excellent
Point is low density, high mechanical properties, material property anisotropy, and processing technology is ripe, and can be processed into variously-shaped, shortcoming
It is that power consumption of polymer processing is high, pollutes high, therefore is especially suitable for the complicated part of this complex-shaped, stress of metal connecting piece 2.Bamboo trunk 1
Raw material are Recombined bamboo or bamboo cord wood, be primary bamboo by discongesting, drying, impregnation, the series of processes such as compacting process and
Into, it is a kind of industrialized production bamboo composite, the machine direction of bamboo wood is consistent with the length direction of bamboo trunk 1, mechanical strength height, property
Can be stable, the advantage of bamboo wood is low density, machine direction high mechanical properties, energy-conserving and environment-protective, has the disadvantage that material property is each to different
Property, perpendicular to the poor mechanical property of machine direction, hardness is low, easy to crack, surface modeling ability, therefore is especially suitable for bamboo trunk 1
The simple rod member of this simple shape, stress form.
It is a kind of industrialization product, cost is low and performance is consistent using bamboo trunk 1 and the bamboo bicycle rack of metal connecting piece 2.
But according to European standard EN14764, when carrying out 100,000 fatigue loadings tests, bamboo bicycle rack is merely through the test of 1,000 times
Occur as soon as cracking, the phenomenon of fracture, it is impossible to meet structure safety requirements.
By theory analysis, the main cause that requirement can not be met by causing the cracking of bamboo trunk 1 is：
1), the modulus along machine direction of bamboo wood is 28GPa, tensile strength 227MPa, can bear larger moment of flexure, but
It is only 9GPa, tensile strength 39MPa perpendicular to the modulus of machine direction.During testing fatigue, because bamboo wood is perpendicular to machine direction
Modulus it is small, resistance capacity to deformation is small, and bamboo trunk section becomes ovalisation by circle, and strain and stress is larger, but perpendicular to bamboo wood
The intensity of machine direction but very little, therefore cause bamboo trunk 1 to ftracture；
2), bamboo wood is that anisotropic material, hardness are low, and modulus is 28GPa, low-density alloy material such as aluminium alloy modulus
72GPa, bamboo trunk 1 produces rigidity mutation with the abutting edge of metal outer pipe 2 and shape is mutated, and causes larger stress concentration, therefore make
Into the fracture of bamboo trunk.
In order to which the bamboo trunk 1 for solving bamboo bicycle rack ftractures and breakage problem, following method is taken to solve：1) metal, is increased
Internal lining pipe 3, it is Nian Jie with the inner surface of bamboo trunk 1, to increase the section resistance capacity to deformation of bamboo trunk 1, prevent the section of bamboo trunk 1 from being become by circle
Ovalisation, solves the problem of Cracking of bamboo trunk 1；2), stress release is increased in the original position Nian Jie with bamboo trunk 1 of metal outer pipe 4
Ring 6, respectively with the inner surface of metal outer pipe 4 and the outer surface of bamboo trunk 1 by structure glue sticking, reduce due to shape mutation and
The stress concentration that rigidity mutation is produced.
Metal inner lining pipe 3, stress release ring 6 be low-density alloy material, such as aluminium alloy or titanium alloy, in order to resist compared with
Big deformation and stress.While metal inner lining pipe 3, stress release ring 6 should ensure that bamboo trunk 1 does not ftracture, is broken, shorten it as far as possible
Length, while cost is reduced, reduces the weight of bamboo bicycle rack.Fig. 9 is that loading 100kg load is carried out to bamboo bicycle
When, the stress of bamboo trunk 1 stretches out the curve of the length change of metal outer pipe 4 with metal inner lining pipe 3.Therefrom find, when metal inner lining pipe 3 is stretched
When the length for going out metal outer pipe 4 exceedes the external diameter of bamboo trunk 1, the stress of bamboo trunk 1 no longer changes, therefore, and metal inner lining pipe 3 should be stretched
The length for going out metal outer pipe 4 is one times of the external diameter of bamboo trunk 1；Figure 10 is bamboo trunk 1 when loading 100kg load is carried out to bamboo bicycle
The curve of the length change of metal outer pipe 4, wherein stress release ring wall thickness 0.5mm are stretched out with stress release ring 6.Therefrom find, when
Stress release ring 6 is stretched out after the wall thickness that the length of metal outer pipe 4 exceedes metal outer pipe 4, and the stress range of decrease of bamboo trunk 1 is not notable, because
This, the length that stress release ring 6 should stretch out metal outer pipe 4 is one times of the wall thickness of metal outer pipe 4.
Metal inner lining pipe 3 can be designed as one, i.e. metal inner lining pipe 3 with metal connecting piece 2 and be welded on metal connecting piece 2
On, so can simplify the installation procedure of bamboo bicycle rack, but due to need guarantee metal internal lining pipe 3, metal outer pipe 4 axiality
And secondary welding is carried out, cause the processing cost of metal connecting piece 2 extremely high.In order to reduce processing charges, increase connection
Ring 5, positioned at the end of bamboo trunk 1, its outer surface and inner surface are gluing by structure with metal outer pipe 4, metal inner lining pipe 3 respectively
Connect, and bonding length is not less than 2 times of the wall thickness of metal outer pipe 4.Non-metallic inner liner pipe 3 and gold by the bonding of connection ring 5
Belong to the direct welding of connector 2, while the manufacture difficulty without increase bamboo bicycle rack, the metal connecting piece being greatly reduced
2 manufacture difficulty, effectively reduces the processing cost of bamboo bicycle rack.
For the problems such as bamboo bicycle rack cost is high, quality is unstable, bamboo trunk 1 ftractures and is broken, being researched and developed by long-time,
Final the utility model provides the attachment structure of a kind of metal connecting piece 2 of bamboo bicycle rack and bamboo trunk 1, it is characterised in that
The attachment structure includes metal outer pipe 4, metal inner lining pipe 3, bamboo trunk 1, stress release ring 6, connection ring 5 and structure glue 7.
The metal outer pipe 4 and the metal inner lining pipe 3 pass through structure with the outer surface of the bamboo trunk 1 and inner surface respectively
Glue 7 is bonded；The outer surface of the connection ring 5 and inner surface pass through knot with the metal outer pipe 4, the metal inner lining pipe 3 respectively
Structure glue 7 is bonded；The stress release ring 6 is located at the metal outer pipe 4 original position Nian Jie with the bamboo trunk 1, respectively with
The inner surface of the metal outer pipe 4 and the outer surface of the bamboo trunk 1 are bonded by structure glue 7.
The metal outer pipe 4, metal inner lining pipe 3, stress release ring 6, connection ring 5 are low-density alloy material, for example
Aluminium alloy or titanium alloy；The raw material of the bamboo trunk are Recombined bamboo or bamboo cord wood；The structure glue is epoxy structural rubber.
In order to meet the structural reliability that bamboo trunk 1 is connected with metal connecting piece 2, the attachment structure size should meet following
It is required that：
1), the metal outer pipe 4 is not less than the external diameter of bamboo trunk 1 with the Nian Jie length of bamboo trunk 1；
2), the metal inner lining pipe 3 stretches out external diameter of the length not less than bamboo trunk 1 of metal outer pipe 4, i.e., described metal inner lining
Pipe 3 is not less than 2 times of the external diameter of bamboo trunk 1 with the Nian Jie length of bamboo trunk 1；
3), the outer surface of the connection ring 5 is not less than the 2 of the wall thickness of metal outer pipe 4 with the Nian Jie length of the metal outer pipe 4
Times；The inner surface of the connection ring 5 is not less than 2 times of the wall thickness of metal outer pipe 4 with the Nian Jie length of the metal inner lining pipe 3；
4), the wall thickness of stress release ring 6 is 0.5~0.8mm, and the length for stretching out metal outer pipe 4 is not less than metal outer pipe 4
Wall thickness, and 2 times of total length not less than the wall thickness of metal outer pipe 4 of stress release ring 6.
According to the attachment structure of a kind of metal connecting piece 2 of bamboo bicycle rack provided by the utility model and bamboo trunk 1, sheet
The processing method that utility model provides the attachment structure simultaneously, technological process is as follows：
1st, as shown in figure 3, by the end (position Nian Jie with the needs of metal connecting piece 2) of bamboo trunk 1, by mach
Mode, 0.5~0.8mm is reduced by its wall thickness, and decreasing value is consistent with the wall thickness of stress release ring 6.The machining length of bamboo trunk 1 h1 is not
Less than its outer diameter D, the wall thickness of metal outer pipe 4 is t1；
2nd, as shown in figure 4, the position that stress release ring 6 is contacted with bamboo trunk 1, applies structure glue 7, then carried out with bamboo trunk 1
Bonding, the length h2 of stress release ring 6 is not less than 2 times of metal outer pipe wall thickness t1；
3rd, as shown in figure 5, the position that metal inner lining pipe 3 is contacted with bamboo trunk 1, applies structure glue 7, then carried out with bamboo trunk 1
Bonding, bonding length h3 is not less than 2 times of the outer diameter D of bamboo trunk 1；
4th, as shown in fig. 6, the position that connection ring 5 is contacted with bamboo trunk 1, metal inner lining pipe 3 applies structure glue 7, then with bamboo
Pipe 1, metal inner lining pipe 3 are bonded, and the length h4 bonding with metal inner lining pipe 3 of connection ring 5 is not less than the wall thickness t1 of metal outer pipe 4
2 times；
5th, as shown in fig. 7, between connection ring 5, the outer surface of stress release ring 6, and connection ring 5, stress release ring 6
The surface of bamboo trunk 1 apply structure glue；
6th, as shown in figure 8, the part that above-mentioned steps are completed integrally is inserted in the metal outer pipe 4 of metal connecting piece 2, and protect
Wall thickness t1s of the length h5 not less than metal outer pipe 4 that stress release ring 6 stretches out metal outer pipe 4 is demonstrate,proved, metal inner lining pipe 3 stretches out gold
The length h6 for belonging to outer tube 4 is not less than the outer diameter D of bamboo trunk；
7th, the bamboo bicycle rack of above-mentioned completion is fixed and carries out high temperature post cure, 50 °~70 ° of temperature range, after high temperature
Hardening time is not less than 6 hours.
Claims (8)
1. a kind of attachment structure of bamboo bicycle rack, the attachment structure is used to realize the company between metal connecting piece and bamboo trunk
Connect, it is characterised in that the attachment structure includes metal outer pipe, metal inner lining pipe, stress release ring, connection ring and structure glue；
Wherein, the metal outer pipe and the metal inner lining pipe pass through structure glue with the outer surface of the bamboo trunk and inner surface respectively
Bonding；The outer surface of the connection ring and inner surface are gluing by structure with the metal outer pipe, the metal inner lining pipe respectively
Connect；The stress release ring is located at the metal outer pipe original position Nian Jie with the bamboo trunk, respectively with outside the metal
The outer surface of the inner surface of pipe and the bamboo trunk passes through structure glue sticking.
2. attachment structure as claimed in claim 1, it is characterised in that the metal outer pipe, the metal inner lining pipe, it is described should
Power release ring, the connection ring are low-density alloy material.
3. attachment structure as claimed in claim 2, it is characterised in that the low-density alloy material is that aluminium alloy or titanium are closed
Gold.
4. attachment structure as claimed in claim 1, it is characterised in that the structure glue is epoxy structural rubber.
5. attachment structure as claimed in claim 1, it is characterised in that the bonding length of the metal outer pipe and the bamboo trunk is not
Less than the external diameter of the bamboo trunk, the metal inner lining pipe is not less than the 2 of the external diameter of the bamboo trunk with the Nian Jie length of the bamboo trunk
Times, the length that the metal inner lining pipe stretches out metal outer pipe is not less than bamboo trunk external diameter.
6. attachment structure as claimed in claim 1, it is characterised in that the outer surface of the connection ring and the metal outer pipe
It is bonded 2 times that length is not less than metal outer pipe wall thickness；The bonding length of the inner surface of the connection ring and the metal inner lining pipe
Not less than 2 times of metal outer pipe wall thickness.
7. attachment structure as claimed in claim 1, it is characterised in that 0.5~0.8mm of the stress release ring wall thickness.
8. attachment structure as claimed in claim 7, it is characterised in that the length of the stress release ring is not less than the metal
2 times of the wall thickness of outer tube, the stress release ring stretches out wall thickness of the length not less than metal outer pipe of metal outer pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621253337.4U CN206501959U (en) | 2016-11-22 | 2016-11-22 | A kind of attachment structure of bamboo bicycle rack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621253337.4U CN206501959U (en) | 2016-11-22 | 2016-11-22 | A kind of attachment structure of bamboo bicycle rack |
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| Publication Number | Publication Date |
|---|---|
| CN206501959U true CN206501959U (en) | 2017-09-19 |
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ID=59842572
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621253337.4U Active CN206501959U (en) | 2016-11-22 | 2016-11-22 | A kind of attachment structure of bamboo bicycle rack |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108082377A (en) * | 2016-11-22 | 2018-05-29 | 苏州可汗极米科技有限公司 | A kind of connection structure of bamboo bicycle rack |
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2016
- 2016-11-22 CN CN201621253337.4U patent/CN206501959U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108082377A (en) * | 2016-11-22 | 2018-05-29 | 苏州可汗极米科技有限公司 | A kind of connection structure of bamboo bicycle rack |
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