CN202953119U - Foldable bicycle frame - Google Patents
Foldable bicycle frame Download PDFInfo
- Publication number
- CN202953119U CN202953119U CN 201220619698 CN201220619698U CN202953119U CN 202953119 U CN202953119 U CN 202953119U CN 201220619698 CN201220619698 CN 201220619698 CN 201220619698 U CN201220619698 U CN 201220619698U CN 202953119 U CN202953119 U CN 202953119U
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- CN
- China
- Prior art keywords
- way
- lower pipe
- pipe
- leading portion
- tube
- 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 foldable bicycle frame which comprises an upper tube, a head tube, a lower tube front section and a lower tube back section. The upper end of the head tube is connected with the front end of the upper tube in a hinged mode, and a folding joint is formed in the joint of the upper end of the head tube and the front end of the upper tube. The lower end of the head tube is connected with the front end of the lower tube front section in a hinged mode, and a folding joint is formed on the joint of the lower end of the head tube and the front end of the lower tube front section. The back end of the lower tube front section is connected with the front end of the lower tube back section in a hinged mode, and a folding joint is formed on the joint of the back end of the lower tube front section and the front end of the lower tube back section. The back end of the lower tube back section is connected with the back end of the upper tube in a hinged mode, and a folding joint is formed between the back end of the lower tube back section and the back end of the upper tube. An included angle alpha which is larger than 180 degrees is formed between the lower tube back portion and the lower portion front portion. A double-layer bottom bracket is enabled to slightly arch up. Only one wheel of a front wheel and a rear wheel needs to be braked, the other wheel is enabled to be close to the wheel, and folding of the bicycle is conveniently and rapidly completely. Therefore, operation is simple. Due to the fact that arc shape is adopted by the bicycle frame, intensity of a horizontal tube can be effectively improved and folding joints are skillfully avoided.
Description
Technical field
The utility model relates to a kind of vehicle frame of cart, specifically a kind of folding frame for bicycle.
Background technology
Existing foldable bicycle frame generally comprises head tube, transverse tube and seat pipe.Wherein, head tube is positioned at the front end of transverse tube, and the seat pipe of vertical layout is arranged at the middle part of transverse tube.When producing bicycle, front-wheel is installed on the lower end of head tube, and trailing wheel is installed on the rear end of transverse tube, and cushion is installed in the upper end of present pipe, at the upper end of head tube installation car handle.For the ease of folding, usually transverse tube is divided into to two sections, then is hinged together.When needs are folding, just extract relevant lockout mechanism, two sections transverse tubes are folded in the horizontal direction mutually, when needs are used, transverse tube is pulled open, then use the lockout mechanism fix tightly.When if vehicle frame used has two transverse tubes, need two transverse tubes are all disconnected, hinged respectively again, when folding, two transverse tubes are all folding around horizontal direction, so folding joint more complicated, because transverse tube used plays a part the carrying human body weight usually, the pass festival-gathering of this complexity badly influences the intensity of transverse tube, thereby affects its load-carrying capacity.The patent No. is: 200810018717.3 patent of invention discloses a kind of four-link lever folding bicycle frame, utilize double-deck five-way to replace connecting joint, the transverse tube of vehicle frame is rotated when folding in vertical surface, therefore operation is very simple, but this patented technology scheme weak point is that double-deck five-way sinks slightly, stress point moves down, and makes in vehicle frame folding process and needs to carry reinforced tube, manually firmly.
The utility model content
The purpose of this utility model is to design a kind of folding frame for bicycle, the transverse tube of this folding frame for bicycle rotates when folding in vertical surface, therefore operation is very simple, top tube adopts arch, bearing capacity that can more effective raising transverse tube, and avoided cleverly folding joint, and double-deck five-way is slightly to arch, as long as brake in front and back wheel, and another wheel is drawn close and can be completed easily and quickly the folding of bicycle to it.
The technical scheme provided according to the utility model, whole vehicle frame can be divided into 4 parts, is respectively pipe, head tube, lower pipe leading portion and lower pipe back segment, forms " four connecting rods " mechanism; Wherein, the upper end of head tube and the front end of upper pipe are hinged, and connecting portion betwixt forms folding joint; The front end of the lower end of head tube and lower pipe leading portion is hinged, and connecting portion betwixt forms folding joint; The front end of the rear end of lower pipe leading portion and lower pipe back segment is hinged, and connecting portion betwixt forms folding joint; The rear end of lower pipe back segment is connected with back vent, and rear end and the back vent of upper pipe are hinged, so that when folding, trailing wheel and front-wheel draw closer together; The rear end of lower pipe leading portion is connected with the interior five-way of double-deck five-way, and the front end of lower pipe back segment is connected with the outer five-way of double-deck five-way, and lower pipe leading portion and lower pipe back segment adopt double-deck five-way to interconnect, and forms folding joint; The interior five-way of double-deck five-way is positioned at outer five-way, and externally five-way rotation mutually; The rear end of lower pipe back segment is connected with back vent, and rear end and the back vent of upper pipe are hinged, forms folding joint, and the seat pipe is set on upper pipe.
Hinged reinforced tube between the articulated section of the rear end of upper pipe and lower pipe back segment and lower pipe leading portion, improve bulk strength.Lower end in head tube arranges front fork, and the upper end of head tube arranges handlebar.Head tube with on pipe and the hinge point of lower pipe leading portion pin-joint piece is set respectively, the hole that allows to insert jointed shaft is set on pin-joint piece, described pin-joint piece is parallel to the plane that head tube and upper pipe and lower pipe leading portion form, and head tube and upper pipe and lower pipe leading portion utilize respectively together with jointed shaft and pin-joint piece be hinged.A circular elongated slot is opened at the leading portion of five-way middle part outside, and within interior five-way is placed in to outer five-way, lower pipe leading portion rear end is connected with interior five-way through elongated slot, the folding track of the lower pipe leading portion of this elongated slot restriction and lower pipe back segment.
Under folding state, lower pipe back segment is deflection slightly backward, and with ground, angle R is less than 90 degree, and after making stress point partially, thereby the angulation dead angle guarantees that vehicle frame can not launch voluntarily under folding state.Also be provided for locking outside the locating dowel pin of interior five-way and outer five-way on five-way, on interior five-way, corresponding to the position of the state of folding and expansion, be provided for respectively the fixing knock hole of locating dowel pin.Under the state of expansion and folding, the position of fixing interior five-way and outer five-way, make and can not brake in riding or clash into the folding voluntarily that causes vehicle frame, improves safety.
Under deployed condition, the articulated section downward bias of lower pipe back segment and lower pipe leading portion is from the line between the front end of the rear end of lower pipe back segment and lower pipe leading portion, form an angle α who is slightly larger than 180 degree between lower pipe back segment and lower pipe leading portion, double-deck five-way is floated slightly, open locating dowel pin, when user's braking rear-wheel, car is promoted backward, this folding bicycle can conveniently fold.Upper pipe is the upwards Curved of protuberance, to improve the force-bearing situation of upper pipe.
On circular elongated slot top, reinforcing chip is set, strengthen the bearing surface of lower pipe leading portion and outer five-way, gain in strength and safety.
The utility model compared with prior art, there is following advantage and effect: because this folding method adopts four connecting rod associated movements, with traditional folding mode, compare, the folding of vehicle frame simply, fast, easily, safety, top tube adopts arch, intensity that can more effective raising transverse tube, and adopt slightly upwards arch structure of double-deck five-way, make in vehicle frame folding process and need not carry reinforced tube, as long as brake in front and back wheel, and another wheel is drawn close and can be completed easily and quickly the folding of bicycle to it.
The accompanying drawing explanation
Fig. 1 is constructional drawing of the present utility model;
Fig. 2 is folding state figure of the present utility model;
Fig. 3 is the block diagram of double-deck five-way;
Fig. 4 is the planar view of double-deck five-way;
Wherein: manage under 1-front-wheel, 2-front fork, 3-pin-joint piece, 4-head tube, the upper pipe of 5-, 6-seat pipe, 7-reinforced rib, 8-back vent, 9-trailing wheel, 10-reinforced tube, 11-in back segment, 12-and manage leading portion, 15-jointed shaft, 16-folding joint, 17-folding joint, 18-folding joint, 19-folding joint, the outer five-way of 20-, 21-elongated slot under five-way, 13-locating dowel pin, 14-.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment, the utility model is described in further detail:
As shown in the figure: pipe 5 and lower pipe leading portion 14 on the two ends up and down of head tube 4 difference is hinged form respectively folding joint 16 and folding joint 17 at hinge-point; The lower end of the front end of lower pipe leading portion 14 and head tube 4 is hinged, and the rear end of lower pipe leading portion 14 is connected with interior five-way 12, and the front end of lower pipe back segment 11 is connected with outer five-way 20, and outer five-way 20 is enclosed within outside interior five-way 12, forms folding joint 18; The rear end of lower pipe back segment 11 is connected with back vent 8, and the rear end of upper pipe 5 and back vent 8 are hinged, forms folding joint 19.Seat pipe 6 is set on upper pipe 5.Under deployed condition, the articulated section downward bias of lower pipe back segment 11 and lower pipe leading portion 14 is from the line between the front end of the rear end of lower pipe back segment 11 and lower pipe leading portion 14, form an angle α who is slightly larger than 180 degree at lower pipe back segment 11 and 14 of lower pipe leading portions, make double-deck five-way slightly to arch.
During folding, due to the articulated section downward bias of lower pipe back segment 11 and lower pipe leading portion 14 from the line between the front end of the rear end of lower pipe back segment 11 and lower pipe leading portion 14, form an angle α who is slightly larger than 180 degree at lower pipe back segment 11 and 14 of lower pipe leading portions, make double-deck five-way slightly to arch, only need open locating dowel pin 13, brake in front and back wheel, and another wheel is drawn close to it, force lower pipe leading portion 14 and lower pipe back segment 11 centered by folding joint 18, circular elongated slot 21 is track, upwards tortuous, drive folding joint 17, folding joint 18, folding joint 19 rotates together, the trailing wheel 9 that makes to be positioned at pipe 5 rear ends is close to being positioned at the front-wheel 1 that head tube 4 lower ends are fixed on front fork 2, walk to circular elongated slot 21 rears, complete the folding process.
During expansion, only need open locating dowel pin 13, brake in front and back wheel, and another wheel is separated with it, force lower pipe leading portion 14 and lower pipe back segment 11 centered by folding joint 18, circular elongated slot 21 is track, tortuous downwards, drive folding joint 17, folding joint 18, folding joint 19 rotate together, the trailing wheel 9 that makes to be positioned at pipe 5 rear ends be positioned at the front-wheel 1 that head tube 4 lower ends are fixed on front fork 2 and go and separate respectively, walk to circular elongated slot 21 rears, complete the knock hole location of again locating dowel pin 13 being inserted to expanded positions after expansion process.
Lower pipe back segment 14 is connected on outer five-way 20, a circular elongated slot 21 is opened at outer five-way 20 leading portion middle parts, within interior five-way 12 is placed in to outer five-way 20, lower pipe leading portion 14 rear ends are connected with interior five-way 12 through elongated slot 21, the folding track of this elongated slot 21 restriction lower pipe leading portion 14 and lower pipe back segment 11.Be provided for outside locking the locating dowel pin 13 of interior five-way 12 and outer five-way 20 on five-way 20, on interior five-way 12, corresponding to the position of the state of folding and expansion, be provided for respectively the fixing knock hole of locating dowel pin 13.Under the state of expansion and folding, the position of fixing interior five-way 12 and outer five-way.
Be provided for outside locking the locating dowel pin 13 of interior five-way 12 and outer five-way 20 on five-way 20, under the state of interior five-way 12 foldings and expansion, be provided for respectively the fixing knock hole of locating dowel pin 13.Under the state of expansion and folding, the position of fixing interior five-way 12 and outer five-way 20, avoid the potential safety hazard caused in the process of moving.
Between present pipe 6 and upper pipe 5, reinforced tube 7 is arranged, the Joint strenght with raising seat pipe 6 with upper pipe 5.
In use procedure, the front end of the upper end of head tube 4 and upper pipe 5 is hinged, and the front end of the lower end of head tube 4 and lower pipe leading portion 14 is hinged, and the front end of the rear end of lower pipe leading portion 14 and lower pipe back segment 11 is hinged, and the rear end of the rear end of lower pipe back segment 11 and upper pipe 5 is hinged; When folding, upper pipe 5 rotates counterclockwise around upper pipe 5 and the hinge-point of head tube 4; Lower pipe leading portion 14 clockwise rotates around lower pipe leading portion 14 and the hinge-point of head tube 4, and lower pipe back segment 11 rotates counterclockwise around lower pipe back segment 11 and the hinge-point of lower pipe leading portion 14.
The rear end of instantly managing back segment 11 be fixedly connected with the rear end of back vent 8, upper pipe 5 and back vent 8 hinged after, when folding, back vent 8 can be managed 5 hinge-point and be rotated counterclockwise on back vent 8, the trailing wheel 9 that makes to be installed on back vent 8 draws closer together with front-wheel 1.
Above a kind of folding frame for bicycle provided by the utility model is described in detail, for one of ordinary skill in the art, the thought according to the utility model embodiment, all will change in specific embodiments and applications.In a word, the foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (5)
1. a folding frame for bicycle, comprise pipe (5) and head tube (4), it is characterized in that: the front end of the upper end of head tube (4) and upper pipe (5) is hinged, the front end of the lower end of head tube (4) and lower pipe leading portion (14) is hinged, the front end of the rear end of lower pipe leading portion (14) and lower pipe back segment (11) is hinged, and the rear end of the rear end of lower pipe back segment (11) and upper pipe (5) is hinged;
The rear end of lower pipe back segment (11) is connected with back vent (8), and the rear end of upper pipe (5) and back vent (8) are hinged; The rear end of lower pipe leading portion (14) is connected with the interior five-way (12) of double-deck five-way, the front end of lower pipe back segment (11) is connected with the outer five-way (20) of double-deck five-way, the interior five-way (12) of double-deck five-way is positioned at outer five-way (20), and externally five-way (20) rotation mutually;
Hinged reinforced tube (10) between the articulated section of the rear end of upper pipe (5) and lower pipe back segment (11) and lower pipe leading portion (14);
Under folding state, lower pipe back segment (11) is deflection slightly backward, and lower pipe back segment (11) is less than 90 degree with the angle R on ground;
Under deployed condition, the line between the front end of the rear end of lower pipe back segment (11) and lower pipe leading portion (14) is upwards departed from the articulated section of lower pipe back segment (11) and lower pipe leading portion (14), form an angle α who is slightly larger than 180 degree between between lower pipe back segment (11) and lower pipe leading portion (14), forming one, make double-deck five-way slightly to arch.
2. folding frame for bicycle as claimed in claim 1, it is characterized in that: in head tube (4) and the articulated section of upper pipe (5) and lower pipe leading portion (14), pin-joint piece (3) is set respectively, the hole that allows to insert jointed shaft (15) is set on pin-joint piece (3), described pin-joint piece (3) is parallel to the plane that head tube (4), lower pipe leading portion (14) and upper pipe (5) form, and head tube (4) and upper pipe (5) and lower pipe leading portion (14) utilize respectively together with jointed shaft (15) and pin-joint piece (3) be hinged.
3. folding frame for bicycle as claimed in claim 1 is characterized in that: the leading portion of five-way (20) middle part arranges an elongated slot (21) outside, and the rear end of lower pipe leading portion (14) is connected with interior five-way (12) through elongated slot (21); Be provided for outside locking the locating dowel pin (13) of interior five-way (12) and outer five-way (20) on five-way (20), position at the upper state corresponding to folding and expansion of interior five-way (12), be provided for respectively inserting the knock hole of locating dowel pin (13).
4. folding frame for bicycle as claimed in claim 1, is characterized in that: be provided with seat pipe (6) on upper pipe (5), between present pipe (6) and upper pipe (5), reinforced rib (7) arranged; Upper pipe (5) is the upwards Curved of protuberance.
5. folding frame for bicycle as claimed in claim 1, it is characterized in that: in the lower end of head tube (4), front fork (2) is set, the upper end of head tube (4) arranges handlebar; Seat pipe (6) is set on upper pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220619698 CN202953119U (en) | 2012-11-16 | 2012-11-16 | Foldable bicycle frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220619698 CN202953119U (en) | 2012-11-16 | 2012-11-16 | Foldable bicycle frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202953119U true CN202953119U (en) | 2013-05-29 |
Family
ID=48458704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220619698 Expired - Fee Related CN202953119U (en) | 2012-11-16 | 2012-11-16 | Foldable bicycle frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202953119U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106005192A (en) * | 2016-06-27 | 2016-10-12 | 太仓市悦博电动科技有限公司 | Novel folding bicycle |
-
2012
- 2012-11-16 CN CN 201220619698 patent/CN202953119U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106005192A (en) * | 2016-06-27 | 2016-10-12 | 太仓市悦博电动科技有限公司 | Novel folding bicycle |
| CN106005192B (en) * | 2016-06-27 | 2019-08-13 | 太仓市悦博电动科技有限公司 | A kind of folded bicycle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20141116 |
|
| EXPY | Termination of patent right or utility model |