CN106741498B

CN106741498B - Folding bicycle

Info

Publication number: CN106741498B
Application number: CN201710156111.5A
Authority: CN
Inventors: 潘勇
Original assignee: Shenzhen Chuangxinwei Bicycle Co ltd
Current assignee: Shenzhen Chuangxinwei Bicycle Co ltd
Priority date: 2017-03-16
Filing date: 2017-03-16
Publication date: 2022-05-10
Anticipated expiration: 2037-03-16
Also published as: CN106741498A

Abstract

The invention discloses a folding bicycle, comprising: the device comprises a vertical pipe, a rear triangle, a five-way joint fixing seat and a five-way joint fixing connecting rod; the five-way fixing seat is fixedly connected with the vertical pipe; the five-way is rotatably connected with the five-way fixing seat through the five-way fixing connecting rod and can rotate in a set range relative to the five-way fixing seat; the rear triangle is rotatably connected with the five-way joint, and the rotating center is superposed with the axle center of the five-way joint and can rotate in a set range relative to the five-way joint. According to the folding bicycle adopting the technical scheme, the rear triangle is rotatably connected with the five-way joint, and the rotating center is superposed with the axis of the five-way joint, so that a chain cannot be loosened during folding, and the folding is convenient; and still be connected with the five-way fixing base through five-way fixed connecting rod that the five-way is rotatable, rotate the five-way to the riser rear earlier during folding, folding like this, the position of rear wheel can lean on a bit after to make folding back whole car front and back size littleer.

Description

Folding bicycle

Technical Field

The invention relates to the technical field of bicycles, in particular to a folding bicycle.

Background

Folding bicycles (folding bicycles) belong to a category of bicycles that can be folded to reduce the volume when not in use. The existing folding bicycle has a plurality of folding modes, and even if the bicycles of different brands and models adopting the same folding mode are folded, the proportion of volume reduction is different. Moreover, most folding bicycles do not need to be assisted by external tools in the folding process, and the bicycles can be folded and unfolded manually. For example, a common folding bicycle folds a frame to fold front and rear wheels together, so that the length of the folding bicycle can be reduced by about 45%. The folding bicycle can be conveniently placed into a trunk of an automobile after being folded, and some folding bicycles are even placed into a boarding case and a folding bag.

Through development for many years, the foldable bicycle has the characteristics of portability, convenience and comfort in use, mature production process and the like, but the technical development is endless and needs to be continuously explored and improved. For example, the existing folding bicycle can enable the rear triangle to rotate relative to the bicycle frame to fold the rear wheel set, but because the rotation center in the folding process is inconsistent with the axis of the middle shaft, the chain can be loosened in the folding process, and a chain tensioning mechanism needs to be additionally arranged for the purpose, so that the chain is not loosened in the folding process. This not only results in a more complicated structure and increased cost of the entire vehicle, but also is inconvenient in folding, and thus needs to be further improved.

Disclosure of Invention

The invention aims to provide a folding bicycle which is more convenient to fold, simpler in structure and smaller in size after being folded.

In order to solve the technical problem, the invention adopts the following technical scheme:

a folding bicycle, comprising: well pipe and back triangle, its characterized in that, folding bicycle still includes: the five-way fixing seat and the five-way fixing connecting rod are arranged on the bottom plate; the five-way fixing seat is fixedly connected with the middle pipe; the five-way is rotatably connected with the five-way fixing seat through the five-way fixing connecting rod and can rotate in a set range relative to the five-way fixing seat; the rear triangle is rotatably connected with the five-way joint, and the rotating center is superposed with the axle center of the five-way joint and can rotate in a set range relative to the five-way joint.

In a preferred technical scheme, the five-way fixing connecting rod is provided with a cylinder part and two arm parts, the two arm parts are respectively formed by extending partial side walls at two ends of the cylinder part outwards in the same direction, and the tail end of each arm part is provided with a shaft hole which penetrates through the shaft hole and the five-way fixing seat through a rotating shaft and is rotatably connected with the five-way fixing seat; most of the five-way is positioned in the cylinder part, and two ends of the five-way extend out of the cylinder part to be rotatably connected with the rear triangle.

In a further preferred technical scheme, the cylinder part is cylindrical, and the five-way fixing seat is provided with a circular arc-shaped limiting surface matched with the shape of the local outer wall of the cylindrical cylinder part; when the folding bicycle is in use, the cylindrical barrel part is tightly attached to the limiting surface by the local part of the outer wall of the cylindrical barrel part.

In a preferred technical scheme, the rear triangle comprises a connecting beam and two triangle structures, and the two triangle structures are connected into a whole through the connecting beam; the connecting beam is tightly attached to the middle pipe when the folding bicycle is in a use state.

In a further preferred technical scheme, a cushion block is fixedly arranged on the outer wall of the middle pipe corresponding to the connecting beam, and the connecting beam is tightly pressed on the cushion block when the folding bicycle is in a use state.

In a further preferred technical scheme, a clamping hook is arranged on the outer wall of the middle pipe corresponding to the connecting beam, and the clamping hook is used for clamping the connecting beam when the folding bicycle is in a use state.

In a further preferred technical scheme, two ends of the connecting beam are respectively and fixedly connected with the upper corners of the two triangular structures.

In a further preferred technical scheme, the rear triangle is rotatably connected with the five-way valve by the front angles of the two triangle structures.

In a further preferred technical scheme, a through hole is formed in the connecting beam, a screw hole is formed in the corresponding position of the middle pipe, and when the rear triangle is locked with the middle pipe by enabling a bolt to penetrate through the through hole and then to be in threaded connection with the screw hole in the middle pipe.

In the preferred technical scheme, the folding bicycle further comprises a supporting rod, and one end of the supporting rod is fixedly connected with the five-way fixing seat.

The invention has the beneficial effects that:

according to the folding bicycle adopting the technical scheme, the rear triangle is rotatably connected with the five-way joint, and the rotating center is superposed with the axis of the five-way joint, so that a chain cannot be loosened during folding, and the folding is convenient; and still be connected with the five-way fixing base through five-way fixed connecting rod that the five-way is rotatable, rotate the five-way to well pipe rear earlier during folding, folding like this, the position of rear wheel can lean on a bit after to make folding back whole car the preceding back size littleer, and back triangle and transmission system remain as an organic whole all the time.

The present invention is described in further detail below with reference to the attached drawing figures.

Drawings

FIG. 1 is a schematic structural view of a foldable bicycle according to an embodiment of the present invention in a use state;

FIG. 2 is an exploded view of the relevant components of the foldable bicycle in accordance with the preferred embodiment of the present invention;

FIG. 3 is a schematic view of a first folding process of the foldable bicycle in accordance with the embodiment of the present invention;

FIG. 4 is a schematic view of a second folding process of the foldable bicycle in accordance with the present invention;

FIG. 5 is a schematic view of a folding process of the foldable bicycle in accordance with the present invention;

FIG. 6 is a fourth schematic view of a folding process of the foldable bicycle in accordance with the present invention;

fig. 7 is a schematic perspective view of a folded foldable bicycle according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1 and 2, the foldable bicycle provided by the present embodiment includes: the device comprises a middle pipe 1, a rear triangle 2, a five-way joint 3, a five-way fixing seat 4, a five-way fixing connecting rod 5, a seat pipe 6, an upper pipe 7, a head pipe 8, a front fork 9, a front wheel 10 and a rear wheel 11; the five-way fixing seat 4 is fixedly connected with the middle pipe 1; the five-way joint 3 is rotatably connected with the five-way fixing seat 4 through the five-way fixing connecting rod 5 and can rotate in a set range relative to the five-way fixing seat 4; the rear triangle 2 is rotatably connected with the five-way joint 3, the rotating center of the rear triangle coincides with the axis of the five-way joint 3, and the rear triangle can rotate in a set range relative to the five-way joint 3.

By adopting the technical scheme of the specific embodiment of the invention, the rear triangle 2 of the folding bicycle is rotatably connected with the five-way joint 3, and the rotating center is superposed with the axle center of the five-way joint 3, so that the chain cannot be loosened during folding, and the folding is convenient; and still be connected five-way 3 is rotatable with five-way fixing base 4 through five-way fixed connecting rod 5, rotates five-way 3 to well pipe 1 rear earlier during folding, and after folding like this, the position of rear wheel 11 can lean on a bit behind to make folding back whole car the preceding back size littleer, and back triangle and transmission system remain as an organic whole all the time.

In a preferred embodiment, the five-way fixing link 5 has a cylinder 50 and two arm portions 51, and the two arm portions 51 are respectively formed by extending outward from local parts of side walls at two ends of the cylinder 50, and the end of the arm portion 51 has a shaft hole 510, and penetrates through the shaft hole 510 and the five-way fixing seat 4 through a rotating shaft 12, so as to be rotatably connected with the five-way fixing seat 4; most of the five-way valve 3 is positioned in the barrel part 50, and two ends of the five-way valve extend out of the barrel part 50 and are rotatably connected with the rear triangle 2.

In a further preferred technical scheme, the cylindrical part 50 is cylindrical, and the five-way fixing seat 4 is provided with a circular arc-shaped limiting surface 40 matched with the shape of the partial outer wall of the cylindrical part 50; when the foldable bicycle is in use, the cylindrical tube 50 is in close contact with the stopper surface 40 at a part of the outer wall thereof.

In a preferred technical scheme, the rear triangle 2 comprises a connecting beam 21 and two triangle structures 20, and the two triangle structures 20 are connected into a whole through the connecting beam 21; when the folding bicycle is in use, the connecting beam 21 is tightly attached to the middle pipe 1.

In a further preferred technical scheme, a cushion block 13 is fixedly arranged on the outer wall of the middle tube 1 corresponding to the connecting beam 21, and the connecting beam 21 is tightly pressed on the cushion block 13 when the foldable bicycle is in a use state. The cushion block 13 is generally made of rubber and has certain elasticity, so that damage caused by overlarge stress between the connecting beam 21 and the middle pipe 1 can be avoided.

In a further preferred technical solution, a hook 14 is disposed on an outer wall of the middle tube 1 at a position corresponding to the connecting beam 21, and the hook 14 hooks the connecting beam 21 when the foldable bicycle is in a use state. The hook 14 is generally made of plastic material and has a certain elasticity.

In a further preferred technical scheme, two ends of the connecting beam 21 are respectively fixedly connected with the upper corners 201 of the two triangular structures.

In a further preferred embodiment, the rear triangle 2 is rotatably connected to the five-way valve 3 by the front corners 202 of the two triangle structures 20.

In a further preferred technical scheme, a through hole 211 is formed in the connecting beam 21, a screw hole 101 is formed in a corresponding position on the middle pipe 1, and when the rear triangle 2 and the middle pipe 1 are locked by a bolt penetrating through the through hole 211 and then being in threaded connection with the screw hole 101 on the middle pipe 1. In this embodiment, because the cushion block 13 is provided, the cushion block 13 is also correspondingly provided with a through hole for the bolt to pass through.

In the preferred technical scheme, folding bicycle still includes bracing piece 15, the one end and the five-way fixing base 4 fixed connection of bracing piece 15, bracing piece 15 other end and upper tube 7 fixed connection among this embodiment to ensure overall structure's intensity and rigidity, especially the intensity and the rigidity of five-way fixing base 4 on the five-way fixing base 4.

When folding is required, it may be necessary to pull the seat tube 6 upwards as shown in fig. 3, otherwise subsequent folding may be affected. Then the five-way valve 3 can be turned to the back of the middle tube 1 as shown in figure 4. The rear wheels 11 can then be folded forward to the position shown in fig. 5, and finally the seat tube 6 is inserted back down to the position shown in fig. 6 and 7, and the folding of the rear wheels 11 is completed. The folding of the front wheel 10 is effected by a joint on the upper tube 7, as in the prior art, and will not be described in detail here.

The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A folding bicycle, comprising: well pipe and back triangle, its characterized in that, folding bicycle still includes: the five-way fixing seat and the five-way fixing connecting rod are arranged on the bottom plate; the five-way fixing seat is fixedly connected with the middle pipe; the five-way is rotatably connected with the five-way fixing seat through the five-way fixing connecting rod and can rotate in a set range relative to the five-way fixing seat; the rear triangle is rotatably connected with the five-way joint, and the rotating center is superposed with the axis of the five-way joint and can rotate in a set range relative to the five-way joint;

the five-way fixing connecting rod is provided with a cylinder part and two arm parts, the two arm parts are respectively formed by extending the partial side walls at the two ends of the cylinder part outwards in the same direction, and the tail end of each arm part is provided with a shaft hole which penetrates through the shaft hole and the five-way fixing seat through a rotating shaft and is rotatably connected with the five-way fixing seat; most of the five-way is positioned in the cylinder part, and two ends of the five-way extend out of the cylinder part to be rotatably connected with the rear triangle; when the folding bicycle is folded, the five-way tube is firstly rotated to the rear part of the middle tube, and the five-way tube is positioned at the rear part of the middle tube when the folding is finished.

2. The folding bicycle of claim 1, wherein the cylindrical portion is cylindrical, and the five-way fixing seat has a circular arc-shaped limiting surface matched with the shape of the partial outer wall of the cylindrical portion; when the folding bicycle is in use, the cylindrical barrel part is tightly attached to the limiting surface by the local part of the outer wall of the cylindrical barrel part.

3. A foldable bicycle according to claim 1 or 2, wherein the rear triangle comprises a connecting beam and two triangle structures which are connected into a whole by the connecting beam; the connecting beam is tightly attached to the middle pipe when the folding bicycle is in a use state.

4. The foldable bicycle of claim 3, wherein a cushion block is fixedly arranged on the outer wall of the middle tube corresponding to the connecting beam, and the connecting beam is tightly pressed on the cushion block when the foldable bicycle is in use.

5. The foldable bicycle of claim 3, wherein a hook is provided on the outer wall of the middle tube at a position corresponding to the connecting beam, and the hook hooks the connecting beam when the foldable bicycle is in use.

6. A foldable bicycle according to claim 3, wherein the two ends of the connecting beam are fixedly connected to the upper corners of the two triangular structures, respectively.

7. A foldable bicycle according to claim 3, wherein the rear triangle is rotatably connected to the bottom bracket at the front corners of the two triangular structures.

8. A foldable bicycle as claimed in claim 3, wherein the connecting beam is provided with a through hole and the middle tube is provided with a screw hole at a corresponding position, when in use, a bolt can pass through the through hole and then be connected with the screw hole on the middle tube in a threaded manner to lock the rear triangle and the middle tube.

9. The foldable bicycle of claim 1 or 2, further comprising a support rod, wherein one end of the support rod is fixedly connected with the five-way fixing seat.