CN204473021U - A kind of folded bicycle - Google Patents
A kind of folded bicycle Download PDFInfo
- Publication number
- CN204473021U CN204473021U CN201520171177.8U CN201520171177U CN204473021U CN 204473021 U CN204473021 U CN 204473021U CN 201520171177 U CN201520171177 U CN 201520171177U CN 204473021 U CN204473021 U CN 204473021U
- Authority
- CN
- China
- Prior art keywords
- middle pipe
- pipe
- vehicle frame
- front derailleur
- symmetry
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of folded bicycle, comprises being provided with getting attached middle pipe, described in get and be attached to change-speed box, described middle pipe cross-sectional plane is the special-shaped body of oblate arcuation.When the middle pipe cross-sectional plane of folding bicycle is arc-shaped pipe reducer abnormal shape body, change the way of the conventional pipe used, middle pipe cross-sectional plane reduces, namely make the axis of the fixed orifice getting attached fixing Front Derailleur and diminish in the horizontal throw of vehicle frame longitudinal plane of symmetry, give the speed change space that Front Derailleur is larger, make Front Derailleur on chain drum, realize the multi-change speed of three-step gear shift or more multistage fluted disc.Because middle pipe cross-sectional plane is that arc-shaped pipe reducer shape tube physical efficiency prevents the seat pipe be socketed on middle pipe from reversing when riding, safety is high.
Description
Technical field
The utility model relates to bicycle, particularly a kind of folded bicycle.
Background technology
In numerous folding bicycles, in order to the comfortable speed with riding of riding, folded bicycle is generally all provided with speed change system.For realize more speed ride change time, while the Flywheel fluted disc number of trailing wheel increases as far as possible, also increase the fluted disc quantity at chain drum place, speed change before and after being formed.Front Derailleur is all fixed on middle pipe place, Front Derailleur carry out speed change time, need the derailleur in Front Derailleur chain be allocated to will in conjunction with fluted disc, realize completing of Front Derailleur speed change.When Front Derailleur is installed at middle pipe place, general need first to be welded with on middle pipe get attached, then enclose installation Front Derailleur getting, getting the fixed orifice that is attached to for fixing Front Derailleur uses.In folding bicycle garage industry, the axis of fixed orifice and the horizontal throw of vehicle frame longitudinal plane of symmetry, to the derailleur of Front Derailleur chain be allocated to will in conjunction with fluted disc on, the function realizing speed change plays decisive role.The horizontal throw of the axis and vehicle frame longitudinal plane of symmetry of getting attached fixed orifice determines the fluted disc sheet number that Front Derailleur is combined with fluted disc, and restriction speed is not.In cycling, middle pipe is stressed larger, middle pipe can use special material, but cost is higher, therefore in order to cost-saving and expendable weight, general all adopt circular aluminum alloy materials body, but aluminum alloy materials is partially soft, therefore only has and adopt cross-sectional plane to be all just can have larger holding capacity greatlyr.As shown in Figure 1, middle pipe 1 adopts cross-sectional plane to be circular pipe, cross-sectional plane is excessive at vehicle frame longitudinal plane of symmetry both sides width, make to be welded on middle pipe get attached 2 excessive from the horizontal throw of vehicle frame longitudinal plane of symmetry, the horizontal throw of getting the vehicle frame line of centers A on the axis B of the fixed orifice 21 of attached 2 fixing Front Derailleurs and vehicle frame longitudinal plane of symmetry generally all remains on 27mm, just can allow the derailleur of Front Derailleur chain 5 be allocated to chain drum 4 will in conjunction with two panels fluted disc on, this is also at most only can two panels fluted disc; The distance less than 27mm can not be realized, therefore can not use the fluted disc of more multi-disc, limit speed not.Can not meet Front Derailleur and can realize three-step gear shift, namely chain drum is provided with three fluted discs, or more fluted disc.Because middle pipe adopts pipe body, reverse seat when making easily to cause when riding socket seat pipe thereon excessive by torsion and manage, safety is low.
Utility model content
The utility model aims to provide a kind of rational in infrastructure, and the speed increasing chain drum is other, the folded bicycle that safety is high.
The utility model is achieved in that a kind of folded bicycle, comprises being provided with getting attached middle pipe, described in get and be attached to change-speed box, described middle pipe cross-sectional plane is the special-shaped body of oblate arcuation.
Described middle pipe cross-sectional plane is the special-shaped body of oblate arcuation pipe reducer, and described middle pipe comprises stub end and little head end; Described stub end is by vehicle frame main beam pipe side, and described little head end is positioned at away from vehicle frame main beam pipe side.
Described middle pipe is with vehicle frame longitudinal plane of symmetry for axis of symmetry, and the body outermost edge of described middle pipe is 15.05mm ~ 17.45mm to the horizontal throw of described vehicle frame longitudinal plane of symmetry.
The body outermost edge of described middle pipe is 17.45mm to the horizontal throw of described vehicle frame longitudinal plane of symmetry.
Describedly get the fixed orifice being attached to fixing described change-speed box, the horizontal throw of described fixed orifice axis and described vehicle frame longitudinal plane of symmetry is 25mm.
Described middle pipe body is aluminum alloy materials.
Also comprise chain drum, described chain drum is socketed the chain controlled by Front Derailleur, and the fluted disc of described chain drum is more than three or three.
The beneficial effects of the utility model are: when the middle pipe cross-sectional plane of folding bicycle is oblate arcuation abnormal shape body, change the way of the conventional pipe used, middle pipe cross-sectional plane reduces, namely make the axis of the fixed orifice getting attached fixing Front Derailleur and diminish in the horizontal throw of vehicle frame longitudinal plane of symmetry, give the speed change space that Front Derailleur is larger, make Front Derailleur on chain drum, realize the multi-change speed of three-step gear shift or more multistage fluted disc.Because middle pipe cross-sectional plane is that oblate arcuation shape tube physical efficiency prevents the seat pipe be socketed on middle pipe from reversing when riding, safety is high.
Accompanying drawing explanation
Fig. 1 is that in the vehicle frame of existing folded bicycle, pipe is the structural representation of pipe body;
Fig. 2 is the structural representation of pipe in the vehicle frame of folded bicycle of the present utility model;
Fig. 3 is the integral structure schematic diagram being arranged with Front Derailleur of pipe in the vehicle frame of folded bicycle of the present utility model;
Fig. 4 is another integral structure schematic diagram being arranged with Front Derailleur of pipe in the vehicle frame of folded bicycle of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, a kind of folded bicycle of the utility model is described in further details.
Please refer to shown in Fig. 2 to Fig. 4, folded bicycle, comprise the middle pipe 1 being provided with and getting attached 2, get the fixed orifice 21 that attached 2 are provided with fixing Front Derailleur 3, the chain 5 that chain drum 4 and Front Derailleur 3 control; Chain 5 is socketed on chain drum 4.Middle pipe 1 cross-sectional plane is oblate arcuation opposite sex body, middle pipe 1 cross-sectional plane in the present embodiment is oblate arcuation pipe reducer opposite sex body, and namely, pipe 1 cross-sectional plane comprises stub end 11 and little head end 12, stub end 11 is positioned at identical side, cycling direction, little head end 12 is positioned at the reciprocal side of cycling, namely stub end 11 and bicycle are by vehicle frame main beam pipe side, little head end 12 is positioned at away from vehicle frame main beam pipe side, and middle pipe 1 body with vehicle frame longitudinal plane of symmetry for axis of symmetry bilateral symmetry, make in riding, uniform force, safety is high, and when riding, due to braking brake frequently, and stub end 11 and little head end 12 are all in the positive opposite ends in garage direction, eliminate while there is larger intensity when braking human body forward or layback time the seat pipe impulse force that produces, also the torsion of a pipe is prevented, safety performance is high.
In bicycle trade, chain drum 4 line of centers is all identical with the distance between center line of vehicle frame plane with the line of centers of the flywheel of bicycle rear, namely the line of centers of the flywheel of chain drum 4 line of centers and bicycle rear is straight line, and to be installed on the Front Derailleur 3 got in attached 2 dials chain stroke when speed change be certain, this just makes at random can not to increase fluted disc at the chain drum 4 of bicycle does not increase to make speed, therefore, not just meet maximum group of chain stroke of Front Derailleur 3 as best one can to increase speed in chain drum 4, but in prior art, due to middle pipe 1 use circular body or other bodys to make middle pipe 1 pipe welding get attached 2 time, the horizontal throw between axis B and the line of centers A of vehicle frame longitudinal plane of symmetry of getting attached 2 fixed orifices 21 is caused to be 27, Front Derailleur 3 stirs chain 5 stroke when speed change is hindered largely, the fluted disc only stirring two panels chain drum 4 carries out speed change.Because the size of the cross-sectional plane of middle pipe 1 can determine maximum group of chain stroke of Front Derailleur 3, the size as far as possible reducing cross-sectional plane can reach maximum group of chain stroke of Front Derailleur 3.In the present embodiment, middle pipe 1 with vehicle frame longitudinal plane of symmetry for axis of symmetry, the body outermost edge that axis of symmetry is provided with the middle pipe 1 getting attached 2 sides is 15.05mm ~ 17.45mm to the horizontal throw of vehicle frame longitudinal plane of symmetry, and namely the tangent line C horizontal throw of line of centers A and middle pipe 1 body outermost edge is 15.05mm ~ 17.45mm; Being specially horizontal throw 15.05mm is the narrowest distance of middle pipe 1, and namely, pipe 1 cross-sectional plane is minimum in the both sides of vehicle frame plane, when cross-sectional plane is minimum, and the special materials such as the material of requirement is harsher, such as titanium alloy, this can meet the rank of higher configured bicycle; During horizontal throw 17.45mm, generally all adopt aluminum alloy materials, such cost is not high, can produce in a large number, and the present embodiment uses aluminum alloy materials.Other in order to make Front Derailleur 3 can realize the speed of three fluted disc speed changes at chain drum 4, therefore in adopting, pipe 1 is provided with the body outermost edge of getting attached 2 sides to the horizontal throw of vehicle frame longitudinal plane of symmetry is 17.45mm, and the horizontal throw of getting the axis B of the fixed orifice 21 of attached 2 and the vehicle frame line of centers A of vehicle frame longitudinal plane of symmetry is 25mm, so just can give the stroke space of required group of chain 5 during Front Derailleur 3 speed change, can realize realizing the speed of more than three or three fluted disc speed changes at chain drum 4 other.Middle pipe 1 cross-sectional plane is that oblate arcuation opposite sex body can also be also passable for the even size in two in cycling direction, or other shape and structures, as long as reach installation when getting attached 2, the horizontal throw of the vehicle frame line of centers A of the axis B of the fixed orifice 21 getting attached 2 and vehicle frame longitudinal plane of symmetry can be kept to be 25mm or to be less than 25mm.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. a folded bicycle, comprises the middle pipe (1) being provided with and getting attached (2), described in get attached (2) and be provided with Front Derailleur (3), it is characterized in that, described middle pipe (1) cross-sectional plane is the special-shaped body of oblate arcuation.
2. folded bicycle according to claim 1, is characterized in that, described middle pipe (1) cross-sectional plane is the special-shaped body of oblate arcuation pipe reducer, and described middle pipe (1) comprises stub end (11) and little head end (12); Described stub end (11) is by vehicle frame main beam pipe side, and described little head end (12) is positioned at away from vehicle frame main beam pipe side.
3. folded bicycle according to claim 2, it is characterized in that, described middle pipe (1) is with vehicle frame longitudinal plane of symmetry for axis of symmetry, and the body outermost edge of described middle pipe (1) is 15.05mm ~ 17.45mm to the horizontal throw of described vehicle frame longitudinal plane of symmetry.
4. folded bicycle according to claim 3, is characterized in that, the body outermost edge of described middle pipe (1) is 17.45mm to the horizontal throw of described vehicle frame longitudinal plane of symmetry.
5. folded bicycle according to claim 4, it is characterized in that, describedly get the fixed orifice (21) that attached (2) are provided with fixing described Front Derailleur (3), the horizontal throw of described fixed orifice (21) axis and described vehicle frame longitudinal plane of symmetry is 25mm.
6. the folded bicycle according to any one of claim 1-5, is characterized in that, described middle pipe (1) body is aluminum alloy materials.
7. the folded bicycle according to any one of claim 1-5, it is characterized in that, also comprise chain drum (4), described chain drum (4) is socketed the chain (5) controlled by Front Derailleur (3), and the fluted disc of described chain drum (4) is more than three or three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171177.8U CN204473021U (en) | 2015-03-18 | 2015-03-18 | A kind of folded bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171177.8U CN204473021U (en) | 2015-03-18 | 2015-03-18 | A kind of folded bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204473021U true CN204473021U (en) | 2015-07-15 |
Family
ID=53628809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520171177.8U Expired - Fee Related CN204473021U (en) | 2015-03-18 | 2015-03-18 | A kind of folded bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204473021U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018141171A1 (en) * | 2016-08-17 | 2018-08-09 | 大行科技(深圳)有限公司 | Foldable scooter |
-
2015
- 2015-03-18 CN CN201520171177.8U patent/CN204473021U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018141171A1 (en) * | 2016-08-17 | 2018-08-09 | 大行科技(深圳)有限公司 | Foldable scooter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210421 Address after: 518100 8th floor, Yizhan business building, 8 Yizhan 4th Road, Shapu community, Songgang street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Meidahang Technology Co.,Ltd. Address before: Baoan District Songgang Tangxia street Shenzhen city Guangdong province 518127 Bay community with rich industrial park song Tang Road No. 18 building AB Patentee before: DAHON TECHNOLOGIES, Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |