Folding bicycle

Abstract

The utility model belongs to the technical field of folding bicycles, and particularly relates to a folding bicycle. The utility model provides a folding bicycle which aims at solving the problems that in the prior art, a folding bicycle is poor in stability, and wheels are inconvenient to install. A folding bicycle comprises a front bicycle frame and a rear bicycle frame, a folding assembly is arranged between the front bicycle frame and the rear bicycle frame, when the folding assembly is unfolded, the front bicycle frame is far away from the rear bicycle frame, and when the folding assembly is folded, the front bicycle frame is close to the rear bicycle frame; the front bottom frame and the rear bottom frame are connected with the front frame and the rear frame in a rotating mode to form a stable bottom frame structure. By means of the design, the stability of the folding bicycle in the unfolded state is guaranteed, and folding operation can be conveniently carried out when needed. The two rod type folders are located on the two sides of the bottom frame respectively, the front bottom frame and the rear bottom frame are effectively supported through the supporting rods, and the stability of the whole structure is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of folding bicycles, and particularly relates to a folding bicycle. Background Art

[0002] In daily life, when people transport small items such as basketballs, volleyballs, clothes, and express parcels, they often need to use a folding bicycle as a simple transportation tool. The folding bicycles in the prior art have poor stability. In addition, the folding bicycles in the prior art all include wheels, and the wheels are fixed to the frame by screws. This fixing method makes the installation and removal of the wheels inconvenient. Content of the Utility Model

[0003] The utility model provides a folding bicycle, aiming to solve the problems of poor stability and inconvenient wheel installation of the folding bicycle in the prior art.

[0004] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0005] A folding bicycle includes a front frame and a rear frame. A folding assembly is arranged between the front frame and the rear frame. When the folding assembly is unfolded, the front frame is far away from the rear frame. When the folding assembly is folded, the front frame is close to the rear frame;

[0006] The folding assembly includes a front bottom frame rotatably connected to the front frame and a rear bottom frame rotatably connected to the rear frame. The front bottom frame and the rear bottom frame form the bottom frame of the folding bicycle;

[0007] The folding assembly further includes rod-type folding devices arranged between the front frame and the rear frame. There are two rod-type folding devices, and the two rod-type folding devices are respectively located on both sides of the bottom frame. A support rod for supporting the front bottom frame and the rear bottom frame is arranged between the two rod-type folding devices;

[0008] When the folding assembly is unfolded, the support rod supports the front bottom frame and the rear bottom frame, and keeps the front bottom frame and the rear bottom frame in a horizontal state;

[0009] A front wheel is arranged on the front frame, and the front wheel is clamped to the front frame through a front connecting seat. A rear wheel is arranged on the rear frame, and the rear wheel is clamped to the rear frame through a rear connecting seat.

[0010] A further improved solution: the front connecting seat is provided with a front plugging column plugged into the front frame, the front frame is provided with a front plugging hole cooperating with the front plugging column, the cross-sectional shape of the front plugging column is circular, the front plugging column is provided with a front ring groove, and the front frame is provided with a front locking plate that prevents the front plugging column from detaching from the front frame along the axial direction, the front frame is provided with a front locking groove cooperating with the front locking plate, the front locking groove is arranged in the horizontal direction, and the front locking groove is communicated with the front plugging hole, the front locking plate is provided with a front slot body cooperating with the front plugging column, and the front locking plate is also provided with a front spring that pushes the front locking plate so that a part of the front locking plate enters the front ring groove, one end of the front spring contacts the front frame, and the other end of the front spring contacts the front locking plate.

[0011] Based on the above technical solution: the front plug post is designed with a circular cross-section. This shape is not only conducive to reducing the friction resistance during assembly, but also ensures a smooth and stable plug-in process. The circular design enables the plug post to automatically correct its position when inserted into the socket, achieves precise positioning, and reduces assembly errors. The front socket set on the front frame cooperates with the front plug post to form a stable plug-in structure. The shape and size of the socket are precisely calculated to ensure that the plug post can be inserted smoothly and remain stable. When the front plug post is inserted into the front socket, a part of the front locking plate will enter the front ring groove under the push of the front spring, thereby realizing the locking of the plug post in the axial direction. This design effectively prevents the plug post from axial movement or disengagement when subjected to force, ensuring the stability and reliability of the connection.

[0012] A further improved solution: the rear connecting seat is provided with a rear plugging column plugged into the rear frame, the rear frame is provided with a rear plugging hole cooperating with the rear plugging column, the cross-sectional shape of the rear plugging column is circular, the rear plugging column is provided with a rear annular groove, and the rear frame is provided with a rear locking plate that prevents the rear plugging column from disengaging from the rear frame along the axial direction, the rear frame is provided with a rear locking groove cooperating with the rear locking plate, the rear locking groove is arranged in a horizontal direction, and the rear locking groove is communicated with the rear plugging hole, the rear locking plate is provided with a rear groove body cooperating with the rear plugging column, and the rear locking plate is also provided with a rear spring that pushes the rear locking plate so that a part of the rear locking plate enters the rear annular groove, one end of the rear spring contacts the rear frame, and the other end of the rear spring contacts the rear locking plate.

[0013] Based on the above technical solution: The rear insertion post is designed with a circular cross-section. This shape can automatically correct its position when inserted into the rear insertion hole, achieving precise positioning. The circular design reduces the frictional resistance during assembly, making the insertion process smoother and more stable. The rear insertion hole provided on the rear frame matches the shape and size of the rear insertion post, ensuring that the insertion post can be smoothly inserted and remain stable. This design simplifies the assembly steps and improves the assembly efficiency. When the rear insertion post is inserted into the rear insertion hole, under the push of the rear spring, a part of the rear locking piece will enter the rear ring groove, thereby achieving automatic locking of the insertion post in the axial direction. This design can complete the locking without additional tools or complex operations, enhancing the convenience of assembly.

[0014] Further improved solution: One end of the front chassis away from the front frame is rotatably connected to one end of the rear chassis away from the rear frame.

[0015] Based on the above technical solution: Since the front chassis and the rear chassis are rotatably connected at one end away from their respective frames, they can be folded synchronously when needed. This synchronous folding not only simplifies the operation process but also improves the folding efficiency and accuracy. The design of synchronous folding enables the entire structure to occupy less space after folding. For example, in the fields of home fitness equipment, outdoor leisure equipment, or transportation tools, this design can significantly reduce the occupied space during storage and transportation.

[0016] Further improved solution: The front chassis is rotatably connected to the front frame through a first connection seat. The first connection seat includes a first fixing part fixedly connected to the front frame and a first mounting part for mounting the front chassis. The front chassis is rotatably connected to the first mounting part;

[0017] The rear chassis is rotatably connected to the rear frame through a second connection seat. The second connection seat includes a second fixing part fixedly connected to the rear frame and a second mounting part for mounting the rear chassis. The rear chassis is rotatably connected to the second mounting part.

[0018] Based on the above technical solution: The first connecting seat and the second connecting seat are firmly connected to the front frame and the rear frame through the first fixing part and the second fixing part respectively, ensuring the stability and safety of the entire structure. This fixed connection can prevent accidents caused by loose connections during use. The front chassis and the rear chassis are respectively rotatably connected to the first mounting part and the second mounting part, enabling them to be folded or unfolded when needed. This design of rotatable connection not only increases the flexibility of the structure but also enables the entire structure to maintain good adaptability in various usage scenarios. Since both the front chassis and the rear chassis are connected to the frame through dedicated connecting seats, when performing folding or unfolding operations, users only need to operate on the connecting seats without having to make complex adjustments to the entire structure. This design simplifies the operation process and improves the user experience.

[0019] Further improved solution: The rod-type folding device includes a first main folding rod and a second main folding rod;

[0020] One end of the first main folding rod is rotatably connected to the support rod, and the other end of the first main folding rod is rotatably connected to the front frame through a first connecting rod. One end of the first connecting rod is rotatably connected to the front frame, and the other end of the first connecting rod is rotatably connected to the first main folding rod;

[0021] One end of the second main folding rod is rotatably connected to the support rod, and the other end of the second main folding rod is rotatably connected to the rear frame through a second connecting rod. One end of the second connecting rod is rotatably connected to the rear frame, and the other end of the second connecting rod is rotatably connected to the second main folding rod;

[0022] The rod-type folding device further includes a first sub-folding rod and a second sub-folding rod;

[0023] One end of the first sub-folding rod is rotatably connected to the front frame, and the other end of the first sub-folding rod is rotatably connected to the second main folding rod through a third connecting rod. One end of the third connecting rod is rotatably connected to the middle part of the second main folding rod, and the other end of the third connecting rod is rotatably connected to the first sub-folding rod;

[0024] One end of the second sub-folding rod is rotatably connected to the rear frame, and the other end of the second sub-folding rod is rotatably connected to the first main folding rod through a fourth connecting rod. One end of the fourth connecting rod is rotatably connected to the middle part of the first main folding rod, and the other end of the fourth connecting rod is rotatably connected to the second sub-folding rod;

[0025] The third connecting rod is rotatably connected to the middle part of the fourth connecting rod, the middle part of the first secondary folding rod is rotatably connected to an end of the first main folding rod close to the first connecting rod, and the middle part of the second secondary folding rod is rotatably connected to an end of the second main folding rod close to the second connecting rod.

[0026] Based on the above technical solution: the first main folding rod and the second main folding rod are respectively rotatably connected to the support rod, and are respectively connected to the front frame and the rear frame through the first connecting rod and the second connecting rod. This design enables the main folding rod to form a stable triangular or quadrilateral support structure when unfolded, effectively dispersing the force and improving the stability of the overall structure. The first secondary folding rod and the second secondary folding rod are respectively connected to the main folding rod through the third connecting rod and the fourth connecting rod, and are respectively rotatably connected to the front frame and the rear frame. This design further enhances the stability of the structure, and reduces the risk of deformation or damage caused by excessive force on a single point by adding additional support points to share the force.

[0027] A further improved solution: the first main folding rod and the second main folding rod are both rotatably connected to the support rod through a seat body.

[0028] Based on the above technical solution: the main folding rod is connected to the support rod by rotation through the seat body, forming a stable connection point. This multi-point connection method helps to disperse the force and reduce the situation where the single point is too large, thereby improving the stability of the overall structure. The design of the rotation connection allows the main folding rod to have a certain degree of flexibility when subjected to external force, but at the same time, it can also reduce unnecessary shaking through the support of the seat body to ensure the stability of the structure.

[0029] A further improved solution: the base body includes a horizontal plate fixed on the support rod and a vertical plate arranged on the horizontal plate, the first main folding rod and the second main folding rod are both rotatably connected to the vertical plate, and the first main folding rod and the second main folding rod are rotatably connected to the vertical plate via the same rotating shaft.

[0030] Based on the above technical solution: the first main folding rod and the second main folding rod are rotatably connected to the vertical plate through the same rotating shaft. This design reduces the number of rotating shafts required, making the structure more compact. At the same time, it also simplifies the installation and disassembly process and reduces the manufacturing cost. Since the two main folding rods share the rotating shaft, the space they occupy when folding and unfolding is more compact, which is conducive to reducing the volume of the entire device and improving space utilization.

[0031] Further improved solution: The front frame includes front columns for installing the rod-type folding device. There are two front columns, and a front rod body connecting the two front columns is arranged between the two front columns. One ends of two rod-type folding devices are respectively arranged on the two front columns.

[0032] The rear frame includes rear columns for installing the rod-type folding device. There are two rear columns, and a rear rod body connecting the two rear columns is arranged between the two rear columns. The other ends of the two rod-type folding devices are respectively arranged on the two rear columns.

[0033] Based on the above technical solution: The front columns and the rear columns serve as the installation points of the rod-type folding device, and together with the connecting rod bodies, they form a stable support structure. This multi-point support design enables the front frame and the rear frame to be more stable when bearing external forces, reducing the risk of deformation and damage. When the rod-type folding device is stressed during the unfolding or folding process, these forces will be dispersed through the front columns, the rear columns, and the connecting rod bodies, avoiding structural damage caused by excessive single-point stress. Since the two rod-type folding devices are respectively arranged on the front columns and the rear columns, and these columns are connected by the connecting rod bodies, the two rod-type folding devices can maintain good synchronism during the folding or unfolding process, making the entire operation process smoother.

[0034] Further improved solution: A handle is also arranged on the rear frame. The handle is a telescopic handle, and the lower end of the handle is rotatably connected to the lower end of the rear frame.

[0035] Based on the above technical solution: The telescopic handle allows users to flexibly adjust the length according to their personal height or pushing / pulling habits, making the operation more comfortable and convenient. Whether it is an adult or a child, they can find a suitable handle position. When not in use, the telescopic handle can be shortened and closely attached to the rear frame, reducing the occupied space and facilitating storage and transportation.

[0036] The beneficial effects of the present utility model are as follows:

[0037] The present utility model adopts that the front underframe and the rear underframe are connected to the front frame and the rear frame through rotational connection, forming a stable bottom frame structure. This design not only ensures the stability of the folding bicycle in the unfolded state but also facilitates the folding operation when needed. The two rod-type folding devices are respectively located on both sides of the bottom frame and effectively support the front underframe and the rear underframe through support rods. This design can ensure that the bottom frame remains horizontal when the folding bicycle is unfolded, thereby improving the overall structural stability.

[0038] The front wheel is snap-fitted to the front frame through a rear connecting seat, and the rear wheel is snap-fitted to the rear frame through a rear connecting seat. This snap-fitting design simplifies the installation process of the wheels, allowing users to disassemble and assemble the wheels without using complex tools. At the same time, this design also facilitates the maintenance and replacement of the wheels. Since the wheels are snap-fitted to the frame, the overall structure is more compact. This not only reduces the volume of the folding bike but also improves its portability.

[0039] The design of the folding assembly enables users to easily unfold and fold the folding bike. The operation can be completed without complex steps or tools, improving the convenience of use for users. The adjustability of the rod-type folding device allows the folding bike to adapt to the needs of different users, providing a better user experience. Brief Description of the Drawings

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 is a schematic diagram of a folding bike of the present invention when unfolded.

[0042] Figure 2 is a schematic diagram of a folding bike of the present invention after being folded.

[0043] Figure 3 is an exploded view of the assembly of the front wheel and the front frame in a folding bike of the present invention.

[0044] Explanation of the Reference Numerals in the Drawings:

[0045] 1 - Front frame; 2 - Rear frame; 3 - Front underframe; 4 - Rear underframe; 5 - Front wheel; 6 - Rear wheel; 7 - Front connecting seat; 8 - Front insertion post; 9 - Front annular groove; 10 - Front locking piece; 11 - Front spring; 12 - First connecting seat; 13 - Second connecting seat; 14 - First main folding rod; 15 - Second main folding rod; 16 - First connecting rod; 17 - Second connecting rod; 18 - First sub-folding rod; 19 - Second sub-folding rod; 20 - Third connecting rod; 21 - Fourth connecting rod; 22 - Seat body; 23 - Handle. Detailed Embodiments

[0046] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present utility model.

[0047] Reference Figures 1 to 3 , a folding bicycle, including a front frame 1 and a rear frame 2. A folding assembly is provided between the front frame 1 and the rear frame 2. When the folding assembly is unfolded, the front frame 1 is away from the rear frame 2. When the folding assembly is folded, the front frame 1 is close to the rear frame 2;

[0048] The folding assembly includes a front bottom frame 3 rotatably connected to the front frame 1 and a rear bottom frame 4 rotatably connected to the rear frame 2. The front bottom frame 3 and the rear bottom frame 4 form the bottom frame of the folding bicycle;

[0049] The folding assembly further includes rod-type folding devices disposed between the front frame 1 and the rear frame 2. There are two rod-type folding devices, and the two rod-type folding devices are respectively located on both sides of the bottom frame. A support rod for supporting the front bottom frame 3 and the rear bottom frame 4 is disposed between the two rod-type folding devices;

[0050] When the folding assembly is unfolded, the support rod supports the front bottom frame 3 and the rear bottom frame 4 and keeps the front bottom frame 3 and the rear bottom frame 4 in a horizontal state;

[0051] A front wheel 5 is disposed on the front frame 1. The front wheel 5 is clamped to the front frame 1 through a front connecting seat 7. A rear wheel 6 is disposed on the rear frame 2. The rear wheel 6 is clamped to the rear frame 2 through a rear connecting seat.

[0052] Specifically: a front insertion post 8 inserted into the front frame 1 is disposed on the front connecting seat 7. A front insertion hole cooperating with the front insertion post 8 is disposed on the front frame 1. The cross-sectional shape of the front insertion post 8 is circular. A front ring groove 9 is disposed on the front insertion post 8. A front locking piece 10 for preventing the front insertion post 8 from disengaging from the front frame 1 along the axial direction is disposed on the front frame 1. A front locking groove cooperating with the front locking piece 10 is disposed on the front frame 1. The front locking groove is disposed in the horizontal direction and communicates with the front insertion hole. A front groove body cooperating with the front insertion post 8 is disposed on the front locking piece 10. A front spring 11 for pushing the front locking piece 10 to make a part of the front locking piece 10 enter the front ring groove 9 is further disposed on the front locking piece 10. One end of the front spring 11 contacts the front frame 1, and the other end of the front spring 11 contacts the front locking piece 10.

[0053] A rear insertion post inserted into the rear frame 2 is provided on the rear connecting seat. A rear insertion hole cooperating with the rear insertion post is provided on the rear frame 2. The cross-sectional shape of the rear insertion post is circular. A rear ring groove is provided on the rear insertion post. A rear locking piece for preventing the rear insertion post from detaching from the rear frame 2 in the axial direction is provided on the rear frame 2. A rear locking groove cooperating with the rear locking piece is provided on the rear frame 2. The rear locking groove is arranged in the horizontal direction and communicates with the rear insertion hole. A rear groove body cooperating with the rear insertion post is provided on the rear locking piece. A rear spring for pushing the rear locking piece to make a part of the rear locking piece enter the rear ring groove is further provided on the rear locking piece. One end of the rear spring contacts the rear frame 2, and the other end of the rear spring contacts the rear locking piece.

[0054] Wherein: One end of the front underframe 3 away from the front frame 1 is rotatably connected to one end of the rear underframe 4 away from the rear frame 2.

[0055] The front underframe 3 is rotatably connected to the front frame 1 through a first connecting seat 12. The first connecting seat 12 includes a first fixing portion fixedly connected to the front frame 1 and a first mounting portion for mounting the front underframe 3. The front underframe 3 is rotatably connected to the first mounting portion.

[0056] The rear underframe 4 is rotatably connected to the rear frame 2 through a second connecting seat 13. The second connecting seat 13 includes a second fixing portion fixedly connected to the rear frame 2 and a second mounting portion for mounting the rear underframe 4. The rear underframe 4 is rotatably connected to the second mounting portion.

[0057] Specifically: The rod-type folding device includes a first main folding rod 14 and a second main folding rod 15.

[0058] One end of the first main folding rod 14 is rotatably connected to the support rod. The other end of the first main folding rod 14 is rotatably connected to the front frame 1 through a first connecting rod 16. One end of the first connecting rod 16 is rotatably connected to the front frame 1, and the other end of the first connecting rod 16 is rotatably connected to the first main folding rod 14.

[0059] One end of the second main folding rod 15 is rotatably connected to the support rod. The other end of the second main folding rod 15 is rotatably connected to the rear frame 2 through a second connecting rod 17. One end of the second connecting rod 17 is rotatably connected to the rear frame 2, and the other end of the second connecting rod 17 is rotatably connected to the second main folding rod 15.

[0060] The rod-type folding device further includes a first sub-folding rod 18 and a second sub-folding rod 19.

[0061] One end of the first secondary folding rod 18 is rotatably connected to the front vehicle frame 1, and the other end of the first secondary folding rod 18 is rotatably connected to the second main folding rod 15 through a third connecting rod 20. One end of the third connecting rod 20 is rotatably connected to the middle part of the second main folding rod 15, and the other end of the third connecting rod 20 is rotatably connected to the first secondary folding rod 18;

[0062] One end of the second secondary folding rod 19 is rotatably connected to the rear vehicle frame 2, and the other end of the second secondary folding rod 19 is rotatably connected to the first main folding rod 14 through a fourth connecting rod 21. One end of the fourth connecting rod 21 is rotatably connected to the middle part of the first main folding rod 14, and the other end of the fourth connecting rod 21 is rotatably connected to the second secondary folding rod 19;

[0063] The middle parts of the third connecting rod 20 and the fourth connecting rod 21 are rotatably connected. The middle part of the first secondary folding rod 18 is rotatably connected to one end of the first main folding rod 14 close to the first connecting rod 16, and the middle part of the second secondary folding rod 19 is rotatably connected to one end of the second main folding rod 15 close to the second connecting rod 17.

[0064] Wherein: both the first main folding rod 14 and the second main folding rod 15 are rotatably connected to the support rod through a seat body 22.

[0065] Specifically: the seat body 22 includes a horizontal plate fixed on the support rod and a vertical plate arranged on the horizontal plate. Both the first main folding rod 14 and the second main folding rod 15 are rotatably connected to the vertical plate, and moreover, the first main folding rod 14 and the second main folding rod 15 are rotatably connected to the vertical plate through the same rotating shaft.

[0066] Specifically: the front vehicle frame 1 includes front columns for installing the rod-type folding device. There are two front columns, and a front rod body connecting the two front columns is arranged between the two front columns. One ends of two rod-type folding devices are respectively arranged on the two front columns;

[0067] The rear vehicle frame 2 includes rear columns for installing the rod-type folding device. There are two rear columns, and a rear rod body connecting the two rear columns is arranged between the two rear columns. The other ends of two rod-type folding devices are respectively arranged on the two rear columns.

[0068] Wherein: a handle 23 is further arranged on the rear vehicle frame 2. The handle 23 is a telescopic handle 23, and moreover, the lower end of the handle 23 is rotatably connected to the lower end of the rear vehicle frame 2.

[0069] The working principle of this embodiment:

[0070] When it is necessary to fold the folding bike for storage or carrying, the user can operate the folding components to reduce the distance between the front frame 1 and the rear frame 2. During this process, the front underframe 3 and the rear underframe 4 will rotate around their respective rotation connection points and gradually approach each other. At the same time, the rod-type folder will also perform corresponding folding operations. Eventually, the front frame 1 and the rear frame 2 are closely attached, and the folding bike reaches the most compact state, which is convenient for carrying and storing.

[0071] When it is necessary to use the folding bike, the user only needs to operate the folding components in the reverse direction. The front underframe 3 and the rear underframe 4 gradually unfold under the support of the rod-type folder and the support rod, maintaining a horizontal state to form a stable bottom frame. The distance between the front frame 1 and the rear frame 2 also increases accordingly to ensure stability and comfort.

[0072] The front wheel 5 is clamped to the front frame 1 through the front connection seat 7. The user only needs to align the front wheel 5 with the front connection seat 7 and gently snap it in. The installation method of the rear wheel 6 is similar to that of the front wheel 5, and it is also clamped to the rear frame 2 through the rear connection seat. The user can also easily complete the installation work of the rear wheel 6 without complex tools or steps.

[0073] The utility model is not limited to the above optional implementation manners. On the premise of not conflicting with each other, the various schemes can be arbitrarily combined; anyone can obtain other various forms of products under the inspiration of the utility model. However, no matter what changes are made in its shape or structure, as long as the technical scheme falls within the scope defined by the claims of the utility model, it falls within the protection scope of the utility model.

Claims

1. A folding bicycle, characterized in that: It includes a front frame and a rear frame, and a folding assembly is arranged between the front frame and the rear frame. When the folding assembly is unfolded, the front frame is far away from the rear frame. When the folding assembly is folded, the front frame is close to the rear frame; The folding assembly includes a front bottom frame rotatably connected to the front frame and a rear bottom frame rotatably connected to the rear frame. The front bottom frame and the rear bottom frame form the bottom frame of the folding bicycle; The folding assembly further includes rod-type folding devices arranged between the front frame and the rear frame. There are two rod-type folding devices, and the two rod-type folding devices are respectively located on both sides of the bottom frame. A support rod for supporting the front bottom frame and the rear bottom frame is arranged between the two rod-type folding devices; When the folding assembly is unfolded, the support rod supports the front bottom frame and the rear bottom frame and keeps the front bottom frame and the rear bottom frame in a horizontal state; A front wheel is arranged on the front frame, and the front wheel is clamped to the front frame through a front connecting seat. A rear wheel is arranged on the rear frame, and the rear wheel is clamped to the rear frame through a rear connecting seat.

2. The folding bicycle according to claim 1, wherein: A front insertion post inserted into the front frame is arranged on the front connecting seat. A front insertion hole matched with the front insertion post is arranged on the front frame. The cross-sectional shape of the front insertion post is circular. A front ring groove is arranged on the front insertion post. A front locking piece for preventing the front insertion post from disengaging from the front frame along the axial direction is arranged on the front frame. A front locking groove matched with the front locking piece is arranged on the front frame. The front locking groove is arranged in the horizontal direction and is communicated with the front insertion hole. A front groove body matched with the front insertion post is arranged on the front locking piece. A front spring for pushing the front locking piece to make a part of the front locking piece enter the front ring groove is further arranged on the front locking piece. One end of the front spring contacts the front frame, and the other end of the front spring contacts the front locking piece.

3. A folding bicycle according to claim 2, wherein: A rear insertion post inserted into the rear frame is arranged on the rear connecting seat. A rear insertion hole matched with the rear insertion post is arranged on the rear frame. The cross-sectional shape of the rear insertion post is circular. A rear ring groove is arranged on the rear insertion post. A rear locking piece for preventing the rear insertion post from disengaging from the rear frame along the axial direction is arranged on the rear frame. A rear locking groove matched with the rear locking piece is arranged on the rear frame. The rear locking groove is arranged in the horizontal direction and is communicated with the rear insertion hole. A rear groove body matched with the rear insertion post is arranged on the rear locking piece. A rear spring for pushing the rear locking piece to make a part of the rear locking piece enter the rear ring groove is further arranged on the rear locking piece. One end of the rear spring contacts the rear frame, and the other end of the rear spring contacts the rear locking piece.

4. A folding bicycle according to claim 1, characterized in that: One end of the front bottom frame far away from the front frame is rotatably connected to one end of the rear bottom frame far away from the rear frame.

5. A folding bicycle according to claim 4, wherein: The front bottom frame is rotatably connected to the front frame through a first connecting seat. The first connecting seat includes a first fixing part fixedly connected to the front frame and a first mounting part for mounting the front bottom frame. The front bottom frame is rotatably connected to the first mounting part; The rear chassis is rotatably connected to the rear vehicle frame through a second connecting seat. The second connecting seat includes a second fixing part fixedly connected to the rear vehicle frame and a second mounting part for mounting the rear chassis. The rear chassis is rotatably connected to the second mounting part.

6. A folding bicycle according to claim 5, characterized in that: The rod-type folding device includes a first main folding rod and a second main folding rod; One end of the first main folding rod is rotatably connected to the support rod, and the other end of the first main folding rod is rotatably connected to the front vehicle frame through a first connecting rod. One end of the first connecting rod is rotatably connected to the front vehicle frame, and the other end of the first connecting rod is rotatably connected to the first main folding rod; One end of the second main folding rod is rotatably connected to the support rod, and the other end of the second main folding rod is rotatably connected to the rear vehicle frame through a second connecting rod. One end of the second connecting rod is rotatably connected to the rear vehicle frame, and the other end of the second connecting rod is rotatably connected to the second main folding rod; The rod-type folding device further includes a first sub-folding rod and a second sub-folding rod; One end of the first sub-folding rod is rotatably connected to the front vehicle frame, and the other end of the first sub-folding rod is rotatably connected to the second main folding rod through a third connecting rod. One end of the third connecting rod is rotatably connected to the middle part of the second main folding rod, and the other end of the third connecting rod is rotatably connected to the first sub-folding rod; One end of the second sub-folding rod is rotatably connected to the rear vehicle frame, and the other end of the second sub-folding rod is rotatably connected to the first main folding rod through a fourth connecting rod. One end of the fourth connecting rod is rotatably connected to the middle part of the first main folding rod, and the other end of the fourth connecting rod is rotatably connected to the second sub-folding rod; The middle parts of the third connecting rod and the fourth connecting rod are rotatably connected. The middle part of the first sub-folding rod is rotatably connected to one end of the first main folding rod close to the first connecting rod, and the middle part of the second sub-folding rod is rotatably connected to one end of the second main folding rod close to the second connecting rod.

7. The folding bicycle according to claim 6, wherein: Both the first main folding rod and the second main folding rod are rotatably connected to the support rod through a seat body.

8. The folding bicycle according to claim 7, wherein: The seat body includes a horizontal plate fixed to the support rod and a vertical plate provided on the horizontal plate. Both the first main folding rod and the second main folding rod are rotatably connected to the vertical plate, and moreover, the first main folding rod and the second main folding rod are rotatably connected to the vertical plate through the same rotating shaft.

9. A folding bicycle according to claim 8, characterized in that: The front vehicle frame includes front columns for mounting the rod-type folding device. There are two front columns, and a front rod body connecting the two front columns is arranged between the two front columns. One ends of two rod-type folding devices are respectively arranged on the two front columns; The rear vehicle frame includes rear columns for mounting the rod-type folding device. There are two rear columns, and a rear rod body connecting the two rear columns is arranged between the two rear columns. One ends of two rod-type folding devices are respectively arranged on the two rear columns.

10. A folding bicycle according to claim 1, characterized in that: A handle is further arranged on the rear vehicle frame. The handle is a telescopic handle, and moreover, the lower end of the handle is rotatably connected to the lower end of the rear vehicle frame.

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