Magnetic attraction assembly for folding bicycle and folding bicycle

Abstract

The invention relates to the technical field of folding bicycles, in particular to a magnetic attraction assembly for a folding bicycle and the folding bicycle. The magnetic attraction assembly for the folding bicycle comprises a locking piece, a male disc and a female disc. Wherein a first mounting hole is formed in the male disc, and one end of the locking piece penetrates through the first mounting hole and is in threaded connection with a first hub of a front wheel of the folding bicycle. The mother disc is arranged on a second hub of a rear wheel of the folding bicycle; when the folding bicycle is in a folded state, the attraction face of the male disc and the attraction face of the female disc are correspondingly attached and magnetically connected, and the magnetic attraction force between the male disc and the female disc is not smaller than 280 N. The magnetic attraction assembly for the folding bicycle is easy and convenient to operate, the working efficiency of folding and unfolding the bicycle frame by a user can be improved, and the user experience feeling is improved.

Description

Technical Field

[0001] This invention relates to the field of folding bicycle technology, and more particularly to a magnetic attachment assembly for a folding bicycle and a folding bicycle. Background Technology

[0002] With the acceleration of urbanization and the continuous improvement of residents' demand for convenient travel, folding bicycles, with their core advantages of small footprint and easy portability, are being used more and more widely in daily commutes, short-distance trips, and public transportation connections. More and more folding bicycles are adapting to users' needs for efficient and convenient travel tools.

[0003] Current folding bicycles generally use a mechanical snap-lock structure to lock and secure the folded frame. However, this mechanical snap-lock structure requires extremely high precision in the alignment of the folded frame. Users often encounter difficulties in quickly and accurately aligning the snaps during folding, requiring repeated adjustments and resulting in low efficiency. Furthermore, unfolding the frame involves multiple cumbersome steps, including unlocking the snap-lock mechanism and adjusting the snap positions. This complex process not only prolongs the unfolding time but also increases the user's workload and reduces the user experience.

[0004] Therefore, there is an urgent need to design a magnetic attachment component for folding bicycles and a folding bicycle in order to solve the above technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a magnetic attachment for a folding bicycle and a folding bicycle in general. The invention is simple and convenient to operate, which can improve the efficiency of users in folding and unfolding the bicycle frame and enhance the user experience.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On one hand, the present invention provides a magnetic assemblies for folding bicycles, comprising:

[0008] Locking components;

[0009] The public disc has a first mounting hole, and one end of the locking member passes through the first mounting hole and is threadedly connected to the first hub of the front wheel of the folding bicycle.

[0010] The female disc is mounted on the second hub of the rear wheel of the folding bicycle. When the folding bicycle is in the folded state, the contact surfaces of the male disc and the female disc are correspondingly attached and magnetically connected, and the magnetic attraction between the male disc and the female disc is not less than 280N.

[0011] As an optional technical solution for a magnetic assemblies for folding bicycles, the locking member has a pressing part and a connecting part. The pressing part is connected to one end of the connecting part, and the end of the connecting part away from the pressing part passes through the first mounting hole and is threadedly connected to the first hub. The pressing part presses against the end face of the bearing.

[0012] As an optional technical solution for a magnetic assemblies for folding bicycles, the projected area of ​​the pressing part is larger than the projected area of ​​the first mounting hole along the extending direction of the connecting part.

[0013] As an optional technical solution for a magnetic assemblies for folding bicycles, the public disc is provided with an annular groove, the annular groove has a raised edge on its periphery, the first mounting hole is located in the annular groove, and along the extending direction of the connecting part, the height of the pressing part is not greater than the height of the raised edge.

[0014] As an optional technical solution for a magnetic assemblies for folding bicycles, the female disc has an annular boss on its attraction surface that matches the annular groove. When the male disc and the female disc are attracted together, the annular boss is embedded in the annular groove.

[0015] As an optional technical solution for a magnetic assemblies for folding bicycles, the clamping part is provided with a mounting groove, which is configured to allow a tool to be inserted to apply torque and drive the locking member to rotate relative to the first hub, so as to thread the locking member to or remove it from the first hub.

[0016] As an optional technical solution for a magnetic attachment assembly for a folding bicycle, the mounting groove is one of the following: "straight", "cross", or "star-shaped".

[0017] As an optional technical solution for a magnetic component for a folding bicycle, both the male and female discs are permanent magnets, and the magnetic poles of the male disc are opposite to those of the female disc.

[0018] Alternatively, one of the public disk and the female disk may be a permanent magnet, and the other may be a magnetically conductive material that can be attracted by the permanent magnet.

[0019] As an optional technical solution for a magnetic attachment assembly for a folding bicycle, the mother disc is integrally formed with the second hub;

[0020] Alternatively, the mother disc is provided with a second mounting hole, and a fastening bolt is inserted into the second mounting hole. The fastening bolt is threadedly connected to the second hub to fix the mother disc. A positioning pin is provided on the side of the mother disc near the second hub. The second hub is provided with a positioning hole adapted to the positioning pin, and the positioning pin is disposed in the positioning hole.

[0021] On the other hand, the present invention provides a folding bicycle, the folding bicycle including a frame, a front wheel, a rear wheel, a folding mechanism, and a magnetic component for folding bicycles as described in any of the above optional technical solutions;

[0022] The front wheel is rotatably connected to the front end of the frame via a first hub, and the rear wheel is rotatably connected to the rear end of the frame via a second hub; the folding mechanism is located in the middle of the frame, and the folding mechanism is used to enable the frame to fold so that the front wheel and the rear wheel move closer to each other;

[0023] When the frame is folded, the male and female discs of the magnetic assembly for the folding bicycle are attached to each other and magnetically connected.

[0024] The beneficial effects of the present invention include at least the following:

[0025] This invention provides a magnetic chuck assembly for a folding bicycle, comprising a locking member, a male disc, and a female disc. The male disc has a first mounting hole, and one end of the locking member passes through the first mounting hole and is threadedly connected to the first hub of the front wheel of the folding bicycle. The female disc is mounted on the second hub of the rear wheel of the folding bicycle. When the bicycle is folded, the contact surfaces of the male and female discs are correspondingly attached and magnetically connected, with a magnetic force between them of not less than 280N.

[0026] In this invention, the male disc is directly fixed to the first hub of the front wheel using a locking mechanism, and the female disc is fixed to the second hub of the rear wheel. When the user folds the bicycle, the front and rear wheels can naturally approach each other. The male and female discs attract each other under the action of magnetism. Even if there is a slight misalignment between the male and female discs, the magnetism will automatically correct their positions until the contact surfaces of the male and female discs are completely in contact. There is no need for the user to manually align them. The entire attraction process of the male and female discs does not require additional operations such as pressing and rotating locking mechanisms in existing technologies. Only the folding action of the frame is required to achieve automatic magnetic attraction and fixation of the male and female discs. The operation is simple and convenient, improving the user's work efficiency in folding and storing bicycles and enhancing the user experience.

[0027] Furthermore, the magnetic attraction between the male and female discs in this invention is no less than 280N. This can resist common external forces in the folded state, such as longitudinal vibration during handling and the component force of the wheel's own weight, ensuring that the male and female discs will not separate accidentally, thus improving the stability and reliability after folding. At the same time, the maximum pulling force of an adult's hand can typically reach 350N-500N. The 280N magnetic attraction force allows users to separate the discs without tools, simply by holding the front and rear wheels with both hands and applying a certain pulling force. The operation is simpler than the unlocking and separation steps of mechanical buckles in traditional technologies, improving the convenience of folding and unfolding the vehicle and enhancing the user experience.

[0028] This invention also provides a folding bicycle that eliminates the need for manual alignment or complex mechanical buckles, making operation simple and convenient and simplifying the folding process. Simultaneously, the magnetic fixation is reliable, solving the problems of cumbersome operation and low efficiency of existing folding bicycles. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the folding bicycle (unfolded state) provided in an embodiment of the present invention. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the structure of the folding bicycle (unfolded state) provided in an embodiment of the present invention. Figure 2 ;

[0032] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0033] Figure 4 This is an exploded view of the folding bicycle (unfolded state) provided in an embodiment of the present invention;

[0034] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle;

[0035] Figure 6 This is a structural schematic diagram of the folding bicycle (folded state) provided in an embodiment of the present invention;

[0036] Figure 7 yes Figure 6 A magnified view of a section at point C.

[0037] Figure Labels

[0038] 10. Locking element; 11. Pressing part; 111. Mounting groove; 12. Connecting part; 20. Male disc; 21. First mounting hole; 22. Annular groove; 23. Protruding edge; 30. Female disc;

[0039] 100, Front wheel; 200, First hub; 201, Threaded hole; 300, Rear wheel; 400, Second hub; 500, Frame; 600, Folding mechanism. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0044] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0048] This embodiment provides a magnetic component for folding bicycles, which is simple and convenient to operate, can improve the user's work efficiency in folding and unfolding the frame, and enhance the user experience.

[0049] like Figures 1-7 As shown, the magnetic assemblies for folding bicycles in this embodiment mainly include a locking member 10, a male disc 20, and a female disc 30. The male disc 20 has a first mounting hole 21, and one end of the locking member 10 passes through the first mounting hole 21 and is threadedly connected to the first hub 200 of the front wheel 100 of the folding bicycle. The female disc 30 is mounted on the second hub 400 of the rear wheel 300 of the folding bicycle. When the folding bicycle is folded, the contact surfaces of the male disc 20 and the female disc 30 are correspondingly attached and magnetically connected, and the magnetic attraction force between the male disc 20 and the female disc 30 is not less than 280N.

[0050] Based on the above design, in this embodiment, the locking member 10 is used to directly fix the male disc 20 to the first hub 200 of the front wheel 100, and the female disc 30 is fixed to the second hub 400 of the rear wheel 300. When the user folds the bicycle, the front wheel 100 and the rear wheel 300 can naturally approach each other. The male disc 20 and the female disc 30 generate mutual attraction under the action of magnetism. Even if there is a slight offset between the male disc 20 and the female disc 30, the magnetism will pull them to automatically correct their positions until the contact surfaces of the male disc 20 and the female disc 30 are completely attached. There is no need for the user to manually align them. The entire attraction process of the male disc 20 and the female disc 30 does not require additional operations such as pressing and rotating locking mechanisms of the prior art. Only the folding action of the frame 500 is required to achieve automatic magnetic attraction and fixation of the male disc 20 and the female disc 30. The operation is simple and convenient, improving the user's work efficiency in folding and storing bicycles and enhancing the user experience.

[0051] Furthermore, in this embodiment, the magnetic attraction between the male disc 20 and the female disc 30 is no less than 280N. This can resist common external forces in the folded state, such as longitudinal vibration during handling and the component force of the wheel's own weight, ensuring that the male disc 20 and the female disc 30 will not separate accidentally, thus improving the stability and reliability after folding. At the same time, the maximum pulling force of an adult's hand can typically reach 350N-500N. The 280N magnetic attraction force allows users to separate the wheels without tools, simply by holding the front wheel 100 and the rear wheel 300 with both hands and applying a certain pulling force. The operation is less difficult than the unlocking and separation steps of mechanical buckles in traditional technologies, improving the convenience of folding and unfolding the vehicle and enhancing the user experience.

[0052] like Figures 4-5 As shown, in this embodiment, the locking member 10 has a pressing part 11 and a connecting part 12. The pressing part 11 is connected to one end of the connecting part 12, and the end of the connecting part 12 away from the pressing part 11 passes through the first mounting hole 21 and is threadedly connected to the first hub 200; the pressing part 11 is pressed against the end face of the male disc 20.

[0053] Specifically, the connecting part 12 passes through the first mounting hole 21 of the male disc 20 and is threadedly connected to the threaded hole 201 of the first hub 200. Axial fixation is achieved through the self-locking property of the thread, preventing the male disc 20 from shifting axially along the first hub 200. The clamping part 11 directly clamps the end face of the male disc 20, firmly holding the male disc 20 between the clamping part 11 and the first hub 200, offsetting radial vibration and impact during driving and folding, preventing the male disc 20 from warping or shifting, and ensuring that the contact surface of the male disc 20 always maintains the preset plane and position.

[0054] For example, the clamping part 11 can be a circular flange and integrally formed with the connecting part 12. The connecting part 12 is configured as an externally threaded rod.

[0055] Furthermore, along the extending direction of the connecting portion 12, the projected area of ​​the pressing portion 11 is larger than the projected area of ​​the first mounting hole 21. Specifically, the larger projected area of ​​the pressing portion 11 means that the contact area between the pressing portion 11 and the male disc 20 is larger, which can evenly distribute the locking force on the end face of the male disc 20, avoiding warping or deformation of the male disc 20 due to excessive local force, ensuring that the suction surface of the male disc 20 is flat, and thus ensuring the fit when suctioned with the female disc 30.

[0056] For example, the ratio of the projected area of ​​the clamping part 11 to the projected area of ​​the first mounting hole 21 is greater than 4:1.

[0057] like Figures 4-5 As shown, the male disk 20 has an annular groove 22, and the periphery of the annular groove 22 has a raised edge 23. The first mounting hole 21 is located in the annular groove 22. Along the extending direction of the connecting part 12, the height of the pressing part 11 is no greater than the height of the raised edge 23. The annular groove 22 provides a receiving space for the pressing part 11, so that the pressing part 11 is completely hidden in the annular groove 22, avoiding interference problems in the magnetic connection between the male disk 20 and the female disk 30. The raised edge 23, as the main body of the attraction surface, contacts the female disk 30 without any structural interference, ensuring that the attraction surfaces are completely fitted and improving stability.

[0058] In some optional embodiments, the female disk 30 is provided with an annular boss (not shown in the figure) that is adapted to the annular groove 22 on the suction surface. When the male disk 20 and the female disk 30 are suctioned together, the annular boss is embedded in the annular groove 22.

[0059] The annular boss of the female disk 30 and the annular groove 22 of the male disk 20 form a mechanical positioning fit. Before the magnetic attraction, the annular boss and the annular groove 22 guide each other to achieve initial alignment, assisting the magnetic force to complete the precise attraction. At the same time, after the annular boss is embedded in the annular groove 22, it forms a circumferential limit, which can restrict the relative rotation of the male disk 20 and the female disk 30, enhance the overall stability of the front wheel 100 and the rear wheel 300 in the folded state, and solve the problem of slight misalignment that may occur when relying solely on magnetic force.

[0060] like Figures 4-5 As shown, the clamping part 11 in this embodiment is provided with a mounting groove 111. The mounting groove 111 is configured to allow a tool to be inserted to apply torque and drive the locking member 10 to rotate relative to the first hub 200, so that the locking member 10 is threadedly connected to or disconnected from the first hub 200.

[0061] The mounting groove 111 of the clamping part 11 allows for tool insertion. The tool can apply torque to drive the locking part 10 to rotate. Compared with the structure without a tool groove, it is easier to complete the threaded connection or disassembly of the locking part 10 and the first hub 200, avoiding the problem of difficulty in manual tightening. It is especially suitable for scenarios where the public disc 20 needs to be regularly maintained or replaced, and solves the problem of inconvenient operation of the locking part 10.

[0062] For example, the mounting groove 111 may be located at the center of the end face of the clamping part 11 away from the connecting part 12.

[0063] For example, the mounting slot 111 is one of "flathead", "Phillips head", or "star-shaped". All three types of mounting slots 111 are the most common tool-compatible shapes on the market (flathead screwdrivers and Phillips head screwdrivers can be used directly). Users do not need to purchase additional tools to complete the operation of the locking part 10, which is especially suitable for home users or outdoor emergency maintenance scenarios, thereby avoiding the phenomenon that special tools are not easy to obtain.

[0064] In some optional embodiments, both the male disk 20 and the female disk 30 are permanent magnets, and the magnetic poles of the male disk 20 are opposite to those of the female disk 30. With opposite magnetic poles, the magnetic lines of force can directly penetrate the contact surface to form a strong magnetic loop, resulting in superimposed and enhanced magnetic attraction, suitable for scenarios requiring high fixation strength. For example, both the male disk 20 and the female disk 30 are neodymium iron boron permanent magnets.

[0065] In some optional embodiments, one of the male disc 20 and the female disc 30 is a permanent magnet, and the other is a magnetically conductive material that can be attracted by the permanent magnet. The magnetically conductive material (such as an iron-nickel alloy) can effectively transmit the magnetic force of the permanent magnet, eliminating the need for an additional permanent magnet, significantly reducing material costs and the amount of permanent magnet used, while ensuring reliable engagement, making it suitable for low-cost ordinary folding bicycles. For example, the male disc 20 is a neodymium iron boron permanent magnet, and the female disc 30 is a low-carbon steel or iron-nickel alloy component.

[0066] In some alternative embodiments, the mother disc 30 and the second hub 400 are integrally formed. The mother disc 30 and the second hub 400 are integrally formed by forging or casting, with no assembly gap, which can completely eliminate the displacement and rotation problems of the mother disc 30 relative to the second hub 400, and is suitable for scenarios with extremely high precision requirements, such as high-end folding bicycles.

[0067] In some optional embodiments, the mother disc 30 is provided with a second mounting hole (not shown in the figure), and a fastening bolt passes through the second mounting hole. The fastening bolt is threadedly connected to the second hub 400 to fix the mother disc 30. A locating pin is provided on the side of the mother disc 30 near the second hub 400, and the second hub 400 is provided with a locating hole adapted to the locating pin. The locating pin is disposed in the locating hole. The fastening bolt achieves axial fixation of the mother disc 30, and the locating pin is embedded in the locating hole of the second hub 400 to achieve circumferential limitation and prevent the mother disc 30 from rotating. The fastening bolt enables a detachable connection between the mother disc 30 and the second hub 400. When the magnetic attraction of the mother disc 30 weakens or is damaged, the mother disc 30 can be replaced separately without replacing the second hub 400, reducing maintenance costs.

[0068] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, this embodiment also provides a folding bicycle, which includes a frame 500, a front wheel 100, a rear wheel 300, a folding mechanism 600, and the aforementioned magnetic assemblies for folding bicycles. The front wheel 100 is rotatably connected to the front end of the frame 500 via a first hub 200, and the rear wheel 300 is rotatably connected to the rear end of the frame 500 via a second hub 400. The folding mechanism 600 is located in the middle of the frame 500, and is used to enable the frame 500 to fold so that the front wheel 100 and the rear wheel 300 move closer to each other. When the frame 500 is in the folded state, the male disk 20 and the female disk 30 of the magnetic assemblies for folding bicycles are correspondingly attached and magnetically connected.

[0069] When the folding mechanism 600 brings the front wheel 100 and the rear wheel 300 closer together, the male disc 20 and the female disc 30 of the magnetic attraction component of the folding bicycle automatically engage through magnetic force, eliminating the need for manual alignment or operation of complex mechanical buckles by the user, thus simplifying the folding process. Compared with existing mechanical buckle folding bicycles, the folding bicycle in this embodiment reduces the number of folding operation steps and shortens the folding time. At the same time, the magnetic fixation is reliable, solving the problems of cumbersome operation and low efficiency of existing folding bicycles.

[0070] The folding mechanism 600 in this embodiment is a common bicycle folding component on the market. For example, it can be set as a hinge-type folding mechanism 600 with a rotation angle of 0°-180°. After folding, the front wheel 100 and the rear wheel 300 can remain parallel.

[0071] Optionally, in this embodiment, the male disc 20 can be located on the left or right side of the front wheel 100, and the female disc 30 can be located on the left or right side of the rear wheel 300. When both the male disc 20 and the female disc 30 are located on the same side (i.e., both are located on the left side of the front wheel 100 and the left side of the rear wheel 300; or both are located on the right side of the front wheel 100 and the right side of the rear wheel 300), the male disc 20 and the female disc 30 can be directly folded through the frame 500 to achieve a close magnetic connection. When both the male disc 20 and the female disc 30 are located on opposite sides (i.e., the male disc 20 is located on the left side of the front wheel 100 and the female disc 30 is located on the right side of the rear wheel 300, or the male disc 20 is located on the right side of the front wheel 100 and the female disc 30 is located on the left side of the rear wheel 300), after unlocking the folding mechanism 600, the male disc 20 and the female disc 30 can be aligned and magnetically connected by rotating the front end of the frame 500 by 180°.

[0072] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

[0073] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A magnetic suction assembly for a folding bicycle, characterized in that, include: Locking component (10); The public disc (20) has a first mounting hole (21) provided on it. One end of the locking member (10) passes through the first mounting hole (21) and is threadedly connected to the first hub (200) of the front wheel (100) of the folding bicycle. The female disc (30) is disposed on the second hub (400) of the rear wheel (300) of the folding bicycle. When the folding bicycle is in the folded state, the contact surface of the male disc (20) and the contact surface of the female disc (30) are attached to each other and magnetically connected, and the magnetic attraction between the male disc (20) and the female disc (30) is not less than 280N.

2. The magnetic suction assembly for a folding bicycle according to claim 1, characterized in that, The locking member (10) has a pressing part (11) and a connecting part (12). The pressing part (11) is connected to one end of the connecting part (12). The end of the connecting part (12) away from the pressing part (11) passes through the first mounting hole (21) and is threadedly connected to the first hub (200). The pressing part (11) is pressed against the end face of the male disc (20).

3. The magnetic suction assembly for a folding bicycle according to claim 2, characterized in that, Along the extending direction of the connecting part (12), the projected area of ​​the pressing part (11) is greater than the projected area of ​​the first mounting hole (21).

4. The magnetic suction assembly for a folding bicycle according to claim 2, characterized in that, The public plate (20) is provided with an annular groove (22), and the annular groove (22) has a raised edge (23) on its periphery. The first mounting hole (21) is located in the annular groove (22). Along the extension direction of the connecting part (12), the height of the pressing part (11) is not greater than the height of the raised edge (23).

5. The magnetic suction assembly for a folding bicycle according to claim 4, characterized in that, The female disk (30) has an annular boss on its suction surface that is adapted to the annular groove (22). When the male disk (20) and the female disk (30) are suctioned together, the annular boss is embedded in the annular groove (22).

6. The magnetic suction assembly for a folding bicycle according to claim 2, characterized in that, The clamping part (11) is provided with a mounting groove (111), which is configured to allow a tool to be inserted to apply torque and drive the locking member (10) to rotate relative to the first hub (200) so as to thread the locking member (10) to or remove the first hub (200).

7. The magnetic suction assembly for a folding bicycle according to claim 6, characterized in that, The mounting slot (111) is one of the following: "straight", "cross", or "star".

8. The magnetic assembly for a folding bicycle according to any one of claims 1-7, characterized in that, Both the male disk (20) and the female disk (30) are permanent magnets, and the magnetic poles of the male disk (20) are opposite to those of the female disk (30). Alternatively, one of the public disk (20) and the mother disk (30) may be a permanent magnet, and the other may be a magnetically conductive material that can be attracted by the permanent magnet.

9. The magnetic suction assembly for a folding bicycle according to claim 1, characterized in that, The mother disc (30) and the second hub (400) are integrally formed; Alternatively, the mother plate (30) is provided with a second mounting hole, and a fastening bolt is inserted into the second mounting hole. The fastening bolt is threadedly connected to the second hub (400) to fix the mother plate (30). The mother plate (30) is provided with a positioning pin on the side near the second hub (400). The second hub (400) is provided with a positioning hole that matches the positioning pin. The positioning pin is disposed in the positioning hole.

10. A folding bicycle, characterized in that, The folding bicycle includes a frame (500), a front wheel (100), a rear wheel (300), a folding mechanism (600), and a magnetic assembly for a folding bicycle as described in any one of claims 1-9; The front wheel (100) is rotatably connected to the front end of the frame (500) via the first hub (200), and the rear wheel (300) is rotatably connected to the rear end of the frame (500) via the second hub (400); the folding mechanism (600) is located in the middle of the frame (500), and the folding mechanism (600) is used to enable the frame (500) to be folded so that the front wheel (100) and the rear wheel (300) move closer to each other; When the frame (500) is in a folded state, the male disc (20) and female disc (30) of the magnetic assemblies for the folding bicycle are attached to each other and magnetically connected.

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