Quick-release structure, frame and folding bike

Abstract

This application relates to the field of bicycle technology, disclosing a quick-release structure, a frame, and a folding bicycle. The quick-release structure includes a positioning component, a support axle, a front fork, and a locking assembly. The rear end of the positioning component is connected to the frame, and the support axle is located below the positioning component and rotatably connected to its front end. The front fork is located below the positioning component, with a mounting portion on its upper part suitable for rotatably connecting to the frame, and its rotation axis is in the same direction as the support axle. The locking assembly is used to lock the relative position of the front fork and the support axle. When locked, the support axle abuts against the positioning component and the front fork. When unlocked, the front fork can rotate rearward relative to the support axle, achieving folding of the front fork and frame. This structure can be located on the front side of the frame, achieving folding and unfolding of the front fork through locking and unlocking, facilitating wheel folding relative to the frame, eliminating the need for a multi-section folding frame, improving frame integrity and strength, and allowing the quick-release structure to be repaired or replaced independently.

Description

Technical Field

[0001] This application relates to the field of bicycle technology, and in particular to a quick-release structure, frame, and folding bicycle. Background Technology

[0002] In order to fold and store the front and rear sections of the vehicle body, related technologies have achieved a foldable vehicle body by setting the frame into a foldable multi-segment structure. However, the strength of the frame is affected by this multi-segment design, the connection strength requirements at the folding position are also high, the structure is complex and the operation is troublesome, resulting in a poor user experience. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a quick-release structure that enables the folding of the front fork and frame. This application also proposes a frame and a folding bicycle incorporating this quick-release structure.

[0004] In a first aspect, the quick-release structure of this application includes: a positioning member, a support shaft, a front fork, and a locking assembly. The rear end of the positioning member is adapted to connect to the frame. The support shaft is located below the positioning member, and the upper part of the support shaft is rotatably connected to the front end of the positioning member. The front fork is located below the positioning member, and the upper part of the front fork is provided with a mounting portion. The front fork is adapted to be rotatably connected to the frame, and the rotation axis of the front fork and the rotation axis of the support shaft are in the same direction.

[0005] A locking component is connected to the fork and / or the support shaft to lock the relative position of the fork and the support shaft. The locking component is driven to switch between a locked state and an unlocked state of the support shaft and the fork. In the locked state, the upper part of the support shaft abuts against the positioning member, the lower part of the support shaft abuts against the fork and is detachably connected to the mounting part, and the locking component locks the upper part of the support shaft and the fork. In the unlocked state, the locking component unlocks the support shaft and the fork, and the fork can rotate rearward relative to the support shaft.

[0006] The quick-release structure according to the embodiments of this application has at least the following beneficial effects: In use, the rear end of the positioning member is adapted to connect to the frame. In the locked state, after the support shaft and the fork are locked by the locking component, the upper end of the support shaft abuts against the positioning member, thereby allowing the support shaft to support the fork on the front side of the frame. In the unlocked state, the support shaft and the fork are unlocked, and the fork can be rotated relative to the frame to achieve folding. Therefore, the quick-release structure of the embodiments of this application can be located on the front side of the frame. By locking and unlocking the support shaft and the fork, the folding and unfolding of the fork can be achieved. The fork is usually used to mount the wheel, so the wheel can be folded relative to the frame without having to set the frame as a multi-segment folding structure, which is beneficial to improving the integrity and strength of the frame. At the same time, the quick-release structure can be repaired or replaced separately without replacing the frame. When unfolding is required, simply rotate the fork forward and lock the support shaft and the fork together with the locking component.

[0007] According to some embodiments of the present application, the quick-release structure includes a mounting port having an upward opening in a first direction, and the lower part of the support shaft is removably disposed within the mounting port; in the locked state, the upper part of the support shaft abuts against the positioning member, the lower part of the support shaft is located within the mounting port, and the locking component locks the relative positions of the support shaft and the fork.

[0008] According to some embodiments of the present application, the quick-release structure of the fork is further provided with a positioning hole extending in a second direction at the upper part. The positioning hole is connected to the mounting port and penetrates the outer side wall of the fork. The second direction intersects with the first direction.

[0009] The lower outer wall of the support shaft is provided with a limiting groove. When the lower part of the support shaft is located in the mounting opening, the limiting groove can be aligned with the positioning hole along the second direction.

[0010] The locking assembly includes an operating member, a locking member, and a limiting member connected to the locking member. The locking member is connected to the fork and the operating member. The limiting member is movably disposed in the positioning hole along the second direction and connected to the locking member. The operating member is movably connected to the fork. When the operating member is driven, it can move the limiting member into the limiting groove along the second direction to lock the support shaft and the fork, or move it out of the limiting groove to unlock the support shaft and the fork.

[0011] According to some embodiments of the quick-release structure of this application, in the locked state, the operating member is located on the front side of the fork, the operating member is rotatably connected to the locking member, and the rotation axis of the operating member is parallel to the rotation axis of the fork.

[0012] According to some embodiments of the quick-release structure of this application, the lower outer wall of the support shaft is provided with a first guide surface extending downward and toward the centerline of the support shaft; and / or, the upper part of the fork is provided with a second guide surface extending downward from the upper end face toward the centerline of the mounting port.

[0013] According to some embodiments of the quick-release structure of this application, the fork has a bottom wall at the bottom of the mounting port, and the bottom wall is used to abut the lower end of the support shaft in the locked state.

[0014] According to some embodiments of the present application, the quick-release structure further includes a connector having a first connection position and a second connection position spaced apart. The fork and the connector are rotatably connected to the first connection position, and the connector is adapted to be rotatably connected to the frame at the second connection position. In the locked state, the first connection position is located in front of the second connection position.

[0015] According to some embodiments of the quick-release structure of this application, a shock-absorbing component is provided between the upper and lower parts of the support shaft, the shock-absorbing component being configured to provide elastic force along the axial direction of the support shaft.

[0016] Secondly, the vehicle body of this application embodiment includes a frame and a quick-release structure as described in any of the above embodiments; the support shaft is located at the front of the frame, and the positioning member is connected to the front of the frame.

[0017] Thirdly, the folding bicycle of this application embodiment includes a handlebar, a wheel, and the aforementioned frame; the lower part of the handlebar is rotatably connected to the front part of the frame; and the lower part of the front fork is connected to the wheel.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a bicycle according to an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of a quick-release structure according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of a longitudinal section of a quick-release structure according to an embodiment of this application;

[0022] Figure 4 This is a partial schematic diagram of the lower part of the support shaft in one embodiment of this application;

[0023] Figure 5 This is a partial schematic diagram of the front fork in one embodiment of this application;

[0024] Figure 6 This is a schematic diagram of a locking component in one embodiment of this application;

[0025] Figure 7 This is an exploded view of the support shaft and locking assembly in one embodiment of this application.

[0026] Figure label:

[0027] Positioning component 100;

[0028] Support shaft 200; limiting groove 210; first guide surface 220; first shaft 230; second shaft 240; clearance part 250;

[0029] Front fork 300; mounting part 310; mounting port 320; positioning hole 330; second guide surface 340; bottom wall 350; connecting hole 360;

[0030] Locking component 400; operating component 410; protrusion 411; locking component 420; connecting shaft 421; elastic component 422; locking component 423; limiting component 430; locking groove 431;

[0031] Connector 500; Front section 510; First connecting position 511; Rear section 520; Second connecting position 522;

[0032] Frame 600; Fixed axle 610; Storage space 620;

[0033] Wheel 700;

[0034] Handlebars 800. Detailed Implementation

[0035] The following will clearly and completely describe the concept and technical effects of this application in conjunction with embodiments, so as to fully understand the purpose, features and effects of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application.

[0036] In the description of the embodiments of this application, if directional descriptions are involved, such as "up", "down", "front", "back", "left", "right" etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] In the description of the embodiments of this application, if a feature is referred to as "setting," "fixing," "connecting," or "installing" on another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of this application, if "several" is involved, it means one or more; if "multiple" is involved, it means two or more; if "greater than," "less than," or "exceeds," it should be understood as excluding the stated number; if "above," "below," or "within," it should be understood as including the stated number. If "first" or "second" is involved, it should be understood as used to distinguish technical features, and not as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0038] A bicycle typically consists of a frame, handlebars, and wheels. The frame includes the chassis and the front and rear forks, which connect to the front and rear wheels, respectively. The chassis, as the mounting base for the frame, is primarily used to mount the front and rear forks and handlebars. Related technologies utilize a multi-segment foldable structure for the frame, enabling the bicycle to fold forward and backward, reducing its length in the folded state for easier storage.

[0039] This application provides a quick-release structure that allows the fork and frame to fold, improving the frame's integrity and strength. This application also provides a bicycle frame including this quick-release structure and a folding bicycle. The folding bicycle involved in this application can be a human-powered bicycle or an electric bicycle, etc. The embodiments of this application are described below with reference to the accompanying drawings.

[0040] refer to Figure 1 and Figure 2 The quick-release structure of this application embodiment includes a positioning component 100, a support shaft 200, a front fork 300, and a locking component 400.

[0041] The rear end of the positioning member 100 is adapted to connect to the frame 600. The support shaft 200 is located below the positioning member 100, and the upper part of the support shaft 200 is rotatably connected to the front end of the positioning member 100. The front fork 300 is located below the positioning member 100. The upper part of the front fork 300 is provided with a mounting part 310. The front fork 300 is adapted to be rotatably connected to the frame 600. The rotation axis of the front fork 300 and the rotation axis of the support shaft 200 are in the same direction.

[0042] The locking component 400 is connected to the fork 300 and / or the support shaft 200 to lock the relative position of the fork 300 and the support shaft 200. The locking component 400 can switch the locked and unlocked states of the support shaft 200 and the fork 300 when driven.

[0043] In the locked state, the upper part of the support shaft 200 abuts against the positioning member 100, the lower part of the support shaft 200 abuts against the front fork 300 and is detachably connected to the mounting part 310, and the locking component 400 locks the upper parts of the support shaft 200 and the front fork 300. In use, the rear end of the positioning member 100 is adapted to connect to the frame 600. In the locked state, the support shaft 200 and the front fork 300 are locked by the locking component 400, and the upper end of the support shaft 200 abuts against the positioning member 100, so that the support shaft 200 can support the front fork 300 on the front side of the frame 600.

[0044] In the unlocked state, the locking component 400 unlocks the support shaft 200 and the front fork 300, allowing the front fork 300 to rotate rearward relative to the support shaft 200. Since the support shaft 200 and the front fork 300 are unlocked, the front fork 300 can now rotate rearward relative to the support shaft 200, thus allowing the front fork 300 to rotate relative to the frame 600, achieving folding.

[0045] Therefore, the quick-release structure of this application can be located on the front side of the frame 600. By locking and unlocking the support shaft 200 and the front fork 300, the front fork 300 can be folded and unfolded. The front fork 300 can be used to mount the wheel 700 (e.g., the front wheel 700). Thus, the wheel 700 can be folded relative to the frame 600 without requiring the frame 600 to be a multi-segment folding structure, which improves the integrity and strength of the frame 600. When unfolding is required, simply rotate the front fork 300 forward and lock the support shaft 200 and the front fork 300 together using the locking assembly 400. This operation is convenient, and the quick-release structure can be repaired or replaced independently without replacing the frame 600.

[0046] During riding, as the rider's weight presses downwards, the support shaft 200 presses down on the front fork 300, which in turn presses down on the wheel 700, ensuring the wheel 700 is stably supported on the ground. Thus, during riding, while bearing the weight, the downward pressure of gravity further enhances the connection stability between the support shaft 200 and the front fork 300, thereby improving riding stability and safety. This effectively prevents loosening caused by vibration during riding, further enhancing overall safety and reliability.

[0047] The lower part of the support shaft 200 and the upper part of the fork 300 can be connected by abutment and / or plugging, for example:

[0048] refer to Figure 2 and Figure 3 In some embodiments, the lower part of the support shaft 200 may have a connecting end, which abuts against the mounting part 310 on the upper part of the fork 300. The connecting end and the mounting part 310 may be connected by a locking component 400 to achieve the connection between the support shaft 200 and the fork 300 and to achieve a locked state.

[0049] The locking component 400 can be a structure such as a screw or a latch that allows for a detachable connection between the abutting connecting end and the mounting part 310. For example, a screw can pass through the mounting part 310 on the upper part of the fork 300 and be threadedly connected to the connecting end on the lower part of the support shaft 200, thereby securing the support shaft 200 and the fork 300 together. The latch can be a snap-fit ​​structure, with one end fixedly connected to the mounting part 310 on the upper part of the fork 300 and the other end snapped onto the connecting end on the lower part of the support shaft 200. Locking and unlocking the support shaft 200 and the fork 300 are achieved by engaging and disengaging the latch. Unlocking the locking component 400 releases the connection between the two, achieving an unlocked state. These locking components 400 are simple in structure, easy to operate, and possess high reliability and durability.

[0050] Or, refer to Figure 2 and Figure 3 In some embodiments, the mounting portion 310 may include a mounting opening 320 having an upward opening along a first direction, and the lower portion of the support shaft 200 is removably disposed within the mounting opening 320.

[0051] In the locked state, the upper part of the support shaft 200 abuts against the positioning member 100, and the lower part of the support shaft 200 is located within the mounting opening 320. For example, the lower part of the support shaft 200 is inserted into the mounting opening 320 of the fork 300. The locking assembly 400 locks the relative position of the support shaft 200 and the fork 300. The locking assembly 400 locks the support shaft 200 within the mounting opening 320, achieving the locked state. The locking assembly 400 can be a structure such as a screw that allows for detachable locking of the portion of the support shaft 200 inserted into the mounting opening 320 of the fork 300 to the fork 300. For example, a screw can pass through the side wall of the mounting port 320 of the fork 300 and engage with a pre-set through hole or threaded hole at the lower part of the support shaft 200 to lock the axial position of the support shaft 200. Alternatively, it can pass through a pre-set threaded hole in the side wall of the mounting port 320 of the fork 300 and engage with a pre-set through hole at the lower part of the support shaft 200 to lock the axial position of the support shaft 200. The support shaft 200 can be tightened and locked by rotating the screw. These locking methods are not only easy to operate, but also ensure the stability and reliability of the connection between the support shaft 200 and the fork 300.

[0052] refer to Figures 3 to 6In some embodiments, the upper part of the fork 300 is further provided with a positioning hole 330 extending along a second direction. The positioning hole 330 connects to the mounting opening 320 and penetrates the outer side wall of the fork 300, and the second direction intersects with the first direction. The lower outer side wall of the support shaft 200 is provided with a limiting groove 210. When the lower part of the support shaft 200 is located in the mounting opening 320, the limiting groove 210 can be aligned with the positioning hole 330 along the second direction. The locking assembly 400 may include an operating member 410, a locking member 420, and a limiting member 430 connected to the locking member 420. The operating member 410 and the limiting member 430 can be installed at the mounting opening 320 of the fork 300 through the locking member 420. The limiting member 430 is movably disposed in the positioning hole 330 along the second direction. By operating the operating member 410, the limiting member 430 can be moved in and out of the limiting groove 210 of the support shaft 200, thereby realizing the locking and unlocking of the support shaft 200 and the fork 300. In the locked state, the limiting member 430 engages with the limiting groove 210, thereby restricting the movement of the support shaft 200 along the first direction and ensuring the stability of the connection between the support shaft 200 and the fork 300. The user only needs to rotate the operating member 410 to lock or unlock, making operation more convenient. The angle between the second direction and the first direction must ensure that the limiting member 430 can restrict the movement of the support shaft 200 along the first direction. The intersection can be perpendicular or at other angles (such as acute or obtuse angles), thus allowing the locking assembly 400 to have greater operational flexibility and adapt to different installation environments and operational needs.

[0053] The locking member 420 is connected to the front fork 300 and the operating member 410. The limiting member 430 is movably disposed in the positioning hole 330 along the second direction and connected to the locking member 420. The operating member 410 is movably connected to the front fork 300. When the operating member 410 is driven to move, it can drive the limiting member 430 to enter the limiting groove 210 along the second direction to lock the support shaft 200 and the front fork 300 to achieve the locked state, or move out of the limiting groove 210 to unlock the support shaft 200 and the front fork 300 to achieve the unlocked state.

[0054] refer to Figure 3 , Figure 6 and Figure 7 In some embodiments, the locking member 420 includes a connecting shaft 421 and an elastic member 422.

[0055] A connecting shaft 421 passes through the mounting opening 320 along a second direction. A clearance portion 250 is provided at the lower part of the support shaft 200 to allow passage of the connecting shaft 421. One end of the connecting shaft 421 is connected to the wall of the fork 300, and the other end extends from the positioning hole 330 to the outside of the fork 300 and connects to the operating member 410. Specifically, a connecting hole 360 ​​is provided on the wall of the mounting portion 310 of the fork 300, opposite to the positioning hole 330, connecting the mounting opening 320 to the outside. One end of the connecting shaft 421 passes through the connecting hole 360 ​​and extends from the connecting hole 360 ​​to the outside of the wall of the mounting portion 310. It is locked to the fork 300 by a locking member 423 on the outside of the wall of the mounting portion 310. The locking member 423 and the connecting shaft 421 can be locked together by a threaded connection.

[0056] A limiting member 430 is sleeved on the connecting shaft 421, and an elastic member 422 abuts against the wall and the limiting member 430. The operating member 410 is driven to switch between a first position and a second position. From the first position to the second position, the operating member 410 pushes the limiting member 430 towards the inside of the mounting opening 320; from the second position to the first position, the elastic member 422 pushes the limiting member 430 towards the outside of the mounting opening 320. As an example, the operating member 410 can be a cam structure with a protrusion 411 on one side, connected to one end of the connecting shaft 421 via an eccentric shaft. Rotation of the operating member 410 around the eccentric shaft causes the protrusion 411 to push against the limiting member 430 towards the inside of the mounting opening 320. Reverse rotation of the operating member 410 causes the protrusion 411 to disengage from the limiting member 430, thereby allowing the elastic force of the elastic member 422 to push the limiting member 430 towards the outside of the mounting opening 320.

[0057] The design of the operating component 410 allows users to easily operate the locking component 400, completing locking and unlocking actions without the need for tools, thus improving ease of use. Furthermore, the compact structure and easy installation of the locking component 400 not only reduce the number of parts and manufacturing costs but also contribute to reducing the overall weight of the fork 300 assembly, thereby enhancing the riding experience.

[0058] refer to Figure 3 , Figure 6 and Figure 7In some embodiments, the elastic element 422 can be a compression spring, which is sleeved on the support shaft 200, with both ends abutting between the side wall of the mounting opening 320 and the limiting element 430. The lower part of the support shaft 200 has a clearance opening to allow the connecting shaft 421 and the compression spring to pass through the lower part of the support shaft 200, so that the compression spring and the connecting shaft 421 can enter the clearance opening as the support shaft 200 moves downward into the mounting opening 320. The limiting groove 210 is provided on the front side of the lower part of the support shaft 200 and communicates with the clearance opening, so that after the lower part of the support shaft 200 enters the mounting opening 320 and the limiting groove 210 is aligned with the positioning hole 330, the communicating clearance opening and the limiting groove 210 can provide space for the compression spring and the connecting shaft 421 to accommodate and move.

[0059] refer to Figures 1 to 3 In some embodiments, the operating member 410 is rotatably connected to the locking member 420. In the locked state, the operating member 410 is located on the front side of the fork 300, and the rotation axis of the operating member 410 is parallel to the rotation axis of the fork 300. For example, the operating member 410 is rotatably connected to the locking member 420 about an axis extending along a third direction, which is perpendicular to the second direction. The rotation axes of the fork 300 and the frame 600 are parallel to the third direction. This layout not only facilitates user observation and operation, but also makes the operation of the operating member 410 and the fork 300 more convenient. The rotation operation of the operating member 410 and the rotation operation of the fork 300 can both be performed on the same side of the frame 600 (e.g., the front side). When the fork 300 needs to be folded, the user can lock or unlock it by a simple rotation action on the front side of the frame 600, and then conveniently operate the fork 300 from the front to rotate and fold it backward, improving the ease of use. When the front fork 300 needs to be unfolded, the user can also operate the front fork 300 to rotate forward and unfold by a simple rotation action on the front side of the frame 600, and then turn the operating part 410 to lock it.

[0060] In practical applications, the operating element 410 can be designed in various shapes and sizes to suit different usage needs and aesthetic preferences. Anti-slip textures or raised structures can also be provided on the surface of the operating element 410 to increase the user's feel and stability during operation.

[0061] In addition, refer to Figure 3 , Figure 6 and Figure 7 In some embodiments, the limiting member 430 may also be provided with a locking groove 431 on the side facing the operating member 410. In the locked state, the protrusion 411 of the operating member 410 may be located in the locking groove 431. The locking groove 431 can play a certain safety locking role for the protrusion 411 of the operating member 410, which can effectively prevent accidental unlocking without active operation and further improve the safety and reliability of the quick-release structure.

[0062] To enhance the ease of assembly of the quick-release structure, guide structures can also be provided on the lower outer wall of the support shaft 200 and / or the upper part of the fork 300. For example, refer to Figures 3 to 5 In some embodiments, a first guide surface 220 extending downwards and toward the centerline of the support shaft 200 may be provided on the lower outer wall of the support shaft 200; and / or, a second guide surface 340 extending downwards from the upper end face toward the centerline of the mounting opening 320 may be provided on the upper part of the fork 300. These guide surfaces can play a role in avoiding and guiding the support shaft 200 during insertion into the mounting opening 320, so that the support shaft 200 can smoothly enter the mounting opening 320.

[0063] The lower first guide surface 220 of the support shaft 200 can be formed into a tapered structure with the smaller end facing downwards. This guide surface helps the support shaft 200 to quickly align itself during insertion into the mounting port 320, ensuring rapid assembly and accurate fit between the support shaft 200 and the mounting port 320 of the fork 300. Simultaneously, the tapered design of the first guide surface 220 also allows it to avoid the inner wall of the mounting port 320 of the fork 300 during downward movement of the support shaft 200. This provides greater movement space for the support shaft 200 as it enters the mounting port 320, effectively preventing jamming, improving assembly efficiency, and optimizing the user experience.

[0064] The second guide surface 340 on the upper part of the fork 300 can be a conical structure with the larger end facing upwards. This structure guides the support shaft 200 to quickly align during insertion into the mounting port 320, ensuring rapid assembly and accurate fit between the support shaft 200 and the mounting port 320 of the fork 300. Simultaneously, the conical design of the second guide surface 340 also avoids the outer wall of the support shaft 200 as it moves downwards, providing greater movement space for the support shaft 200 as it enters the mounting port 320. This effectively prevents jamming, improves assembly efficiency, and optimizes the user experience.

[0065] refer to Figure 2 and Figure 5 In some embodiments, the fork 300 has a bottom wall 350 at the bottom of the mounting port 320. The bottom wall 350 is used to abut against the lower end of the support shaft 200 in the locked state, so that the support shaft 200 can be supported between the positioning member 100 and the fork 300, ensuring that the fork 300 can be stably supported in the locked state.

[0066] refer to Figures 1 to 3In some embodiments, the quick-release structure may further include a connector 500 for rotatably connecting to the frame 600. The fork 300 and the connector 500 are rotatably connected. In the locked state, there is a gap between the connection position of the connector 500 to the fork 300 and the connection position of the connector 500 to the frame 600. For example, the connector 500 has a spaced first connection position 511 and a second connection position 522. The fork 300 and the connector 500 are rotatably connected at the first connection position 511, and the connector 500 is adapted to be rotatably connected to the frame 600 at the second connection position 522. In the locked state, the first connection position 511 is located in front of the second connection position 522. Therefore, the positioning component 100, support shaft 200, and connector 500 can form a quadrilateral structure with the front end of the frame 600, which not only facilitates assembly and folding operations, but also improves structural safety when the frame 600 is pressed down by gravity on the support shaft 200 and the front fork 300 during riding, the reaction force on the front fork 300 supports the frame 600 along the axis of the support shaft 200.

[0067] refer to Figure 1 and Figure 3 In some embodiments, the front end of the frame 600 may be provided with a fixed shaft 610 for mounting the lower part of the handlebar 800. The axis of the support shaft 200 and the axis of the fixed shaft 610 may be parallel or substantially parallel. Therefore, the support shaft 200 and the front outer wall of the fixed shaft 610 at the front end of the frame 600 may maintain an appropriate distance, and at the same time, they may have a substantially consistent load-bearing direction when under load.

[0068] refer to Figures 1 to 3 In some embodiments, the rear end of the positioning member 100 can be connected to the upper end of the fixed shaft 610. The positioning member 100 can extend forward relative to the fixed shaft 610, and the second connection position 522 of the connector 500 can be rotatably connected to the rear side of the lower end of the fixed shaft 610, which is more conducive to the rearward folding of the fork 300. The distance between the first connection position 511 and the second connection position 522 is sufficient to allow the connector 500 to rotate forward relative to the fixed shaft 610 to a position where the first connector 500 is in front of or below the front of the fixed shaft 610, so that the first connection position 511 can be easily connected to the fork 300, and there is an appropriate gap between the support shaft 200 and the fixed shaft 610 in the locked state. In some examples, the support shaft 200 and the fixed shaft 610 can be parallel or substantially parallel. Of course, the second connection position 522 can also be provided on the front side of the frame 600 as needed, and can extend forward to connect the fork 300 in front of the fixed shaft 610.

[0069] The connector 500 can be a curved structure. For example, the connector 500 may include a front section 510 and a rear section 520. In the locked state, the rear section 520 of the connector 500 is inclined downward from back to front, and the front section 510 is inclined upward from back to front or is straight. The front section 510 and the rear section 520 form a certain curved or angled structure, which facilitates avoiding the wheel 700 assembly when folded, and avoids the wheel 700 assembly located below the front section 510 when unfolded.

[0070] refer to Figure 2 , Figure 3 and Figure 7 In some embodiments of this application, a shock-absorbing assembly is provided on the support shaft 200 for damping the front fork 300. For example, a shock-absorbing assembly is provided between the upper and lower parts of the support shaft 200, and the shock-absorbing assembly is configured to provide elastic force along the axial direction of the support shaft 200. Therefore, when the front fork 300 is subjected to vibration from the wheel 700, the shock-absorbing assembly can effectively reduce the vibration transmitted to the positioning member 100 via the support shaft 200, thereby reducing the vibration of the frame 600 and the handlebar 800 connected to the frame 600, and improving riding comfort. Furthermore,

[0071] refer to Figure 1 and Figure 3 In some embodiments, the frame 600, positioning member 100, and connecting member 500 can form a quadrilateral dynamic movable structure with the locked support shaft 200 and front fork 300. Specifically, the upper end of the support shaft 200 is rotatably connected to the positioning member 100, the front fork 300 is rotatably connected to the connecting member 500, and the connecting member 500 is rotatably connected to the frame 600. The three rotatably connected shafts can be parallel, thus forming an approximately quadrilateral structure. This quadrilateral structure allows for dynamic adjustment of the vibration transmitted by the front fork 300, providing a certain degree of stability and flexibility. The support shaft 200 and its shock absorption components can work synergistically with the front fork 300, frame 600, connecting member 500, positioning member 100, and other components to form a more complete shock absorption system. This system can adjust the angles of the front fork 300 and support shaft 200 according to different road conditions and riding needs, thereby further improving riding comfort and stability. Shock absorption components can include springs, shock absorbers, and other elements. By adjusting the parameters of these components, the shock absorption effect can be precisely controlled, thereby providing a smoother and more comfortable riding experience.

[0072] Furthermore, since vibrations from the front fork 300 are primarily transmitted to the frame 600 via the support shaft 200 and positioning element 100, placing shock absorbers on the support shaft 200 directly and efficiently achieves effective shock absorption. Compared to commonly used bicycle shock absorption solutions (where shock absorbers are placed on each of the two front forks 300), this structure is simpler, reducing the number and complexity of shock absorption components and lowering manufacturing costs. Simultaneously, by concentrating shock absorption on the support shaft 200, vibrations from the road surface can be absorbed and dispersed more effectively, improving the shock absorption effect. In addition, this structure makes the overall bicycle structure more compact, which helps reduce the bicycle's weight and improve riding efficiency.

[0073] As an example, see reference Figures 1 to 3 and Figure 7 The support shaft 200 includes a first shaft 230, a second shaft 240, and a shock-absorbing assembly. The upper part of the first shaft 230 is rotatably connected to the positioning member 100, and the lower part of the second shaft 240 is used to lock with the front fork 300. The axes of the first shaft 230 and the second shaft 240 are parallel, and the first shaft 230 is sleeved on the upper end of the second shaft 240. The shock-absorbing assembly is connected between the first shaft 230 and the second shaft 240 and is used to absorb vibration along the axial direction of the first shaft 230 and the second shaft 240. The shock-absorbing assembly can be an elastic element such as a spring or shock absorber. These elements are designed to deform under external force, thereby absorbing and dispersing vibration energy.

[0074] When a bicycle travels on uneven surfaces, the front fork 300 experiences impact forces from the road surface. These impact forces are transmitted to the shock absorber via the second axle 240 of the support axle 200. The shock absorber, through the deformation of its internal elastic elements, converts some of the vibration energy into heat or other forms of energy, thereby reducing the impact on the first axle 230 and consequently reducing the impact on the frame 600. With the cushioning provided by the shock absorber, the counter-impact on the front fork 300 is also reduced, thus improving riding comfort.

[0075] refer to Figure 1 The bicycle frame of this embodiment includes a frame 600 and a quick-release structure as described in any of the preceding embodiments. The support shaft 200 of the quick-release structure is located at the front of the frame 600 and plays a key role in connecting the front fork 300 and the frame 600. The positioning member 100 is connected to the front of the frame 600 and serves as a support point for the support shaft 200, effectively positioning the axial position of the support shaft 200. The bicycle frame of this embodiment adopts the quick-release structure as described in any of the preceding embodiments, thereby achieving a foldable front fork frame. This makes the bicycle more convenient to disassemble and assemble, facilitating user carrying and storage.

[0076] As the main load-bearing component of the bicycle, the frame 600's structure is crucial to the bicycle's overall strength. In this embodiment, the quick-release mechanism folds the frame 600 from the front. Compared to some solutions that use segmented folding of the frame 600, this maintains the integrity of the frame 600, eliminating the need for cutting or segmenting. This avoids potential structural damage or deformation during folding and unfolding, as well as the need to replace the entire frame 600 due to connection failures. Furthermore, the quick-release mechanism's folding method is simple and quick; users can easily fold and unfold the front fork 300, greatly improving ease of use. The folded bicycle is more compact, easier to carry and store, providing users with greater convenience.

[0077] Furthermore, the folding joints of segmented frames are typically connected and bear loads by fasteners such as lateral bolts. Under load, these fasteners are mainly subjected to downward pressure (e.g., shear force). However, in this embodiment, since the main load-bearing direction of the fork 300 tends to be consistent with the installation direction of the support shaft 200, the load-bearing capacity of the folding connection position is reduced more effectively, making the folding connection position less susceptible to damage.

[0078] Specifically, in traditional segmented frames, the folding joints require lateral fasteners to withstand significant shear forces when bearing dynamic loads such as the rider's weight and road bumps. Over time, this can lead to loosening or damage of the fasteners. However, in this embodiment, the quick-release support shaft 200 is designed so that the main load-bearing direction of the fork 300 is nearly aligned with and upwards from the installation direction of the support shaft 200. This means the folding joint primarily bears axial force rather than shear force. Axial force bearing stability is far higher than shear force, thus significantly improving the durability and reliability of the folding joint. This not only extends the bicycle's lifespan but also reduces the cost of repair or replacement due to damage to the folding joint.

[0079] refer to Figure 1 The folding bicycle of this application embodiment includes the aforementioned frame, and also includes a handlebar 800 and a wheel 700. The lower part of the handlebar 800 is rotatably connected to the front part of the frame 600. For example, in some embodiments, the lower part of the handlebar 800 is rotatably connected to a fixed shaft 610 at the front part of the frame 600 about an axis. The lower part of the front fork 300 is connected to the wheel 700, so that when the front fork 300 is folded relative to the frame 600, the wheel 700 connected to the front fork 300 can be folded backward under the frame 600.

[0080] In some embodiments, the frame 600 may be configured as a curved structure, thereby forming a receiving space 620 under the frame 600 to receive the rearward-folding wheel 700, reducing space occupation.

[0081] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A quick-release structure, characterized in that, include: A positioning element, the rear end of which is adapted to connect to the vehicle frame; A support shaft is located below the positioning member, and the upper part of the support shaft is rotatably connected to the front end of the positioning member; A front fork is located below the positioning member, and a mounting part is provided on the upper part of the front fork. The front fork is adapted to be rotatably connected to the frame, and the rotation axis of the front fork and the rotation axis of the support shaft are in the same direction. A locking component, connected to the fork and / or the support shaft, is used to lock the relative position of the fork and the support shaft. The locking component is driven to switch the locked state and the unlocked state of the support shaft and the fork. In the locked state, the upper part of the support shaft abuts against the positioning member, the lower part of the support shaft abuts against the fork and is detachably connected to the mounting part, and the locking assembly locks the upper part of the support shaft and the fork. In the unlocked state, the locking component unlocks the support shaft and the fork, allowing the fork to rotate rearward relative to the support shaft.

2. The quick-release structure according to claim 1, characterized in that, The mounting portion includes a mounting opening having an upward opening along a first direction, and the lower part of the support shaft is removably disposed within the mounting opening; In the locked state, the upper part of the support shaft abuts against the positioning member, the lower part of the support shaft is located in the mounting port, and the locking assembly locks the relative position of the support shaft and the fork.

3. The quick-release structure according to claim 2, characterized in that, The upper part of the fork is also provided with a positioning hole extending in a second direction. The positioning hole connects to the mounting port and penetrates the outer side wall of the fork. The second direction intersects with the first direction. The lower outer wall of the support shaft is provided with a limiting groove. When the lower part of the support shaft is located in the mounting opening, the limiting groove can be aligned with the positioning hole along the second direction. The locking assembly includes an operating member, a locking member, and a limiting member connected to the locking member. The locking member is connected to the fork and the operating member. The limiting member is movably disposed in the positioning hole along the second direction and connected to the locking member. The operating member is movably connected to the fork. When the operating member is driven, it can move the limiting member into the limiting groove along the second direction to lock the support shaft and the fork, or move it out of the limiting groove to unlock the support shaft and the fork.

4. The quick-release structure according to claim 3, characterized in that, In the locked state, the operating member is located on the front side of the fork, the operating member is rotatably connected to the locking member, and the rotation axis of the operating member is parallel to the rotation axis of the fork.

5. The quick-release structure according to claim 2, characterized in that, The lower outer wall of the support shaft is provided with a first guide surface extending downwards and toward the centerline of the support shaft; and / or, the upper part of the fork is provided with a second guide surface extending downwards from the upper end face toward the centerline of the mounting opening.

6. The quick-release structure according to claim 2, characterized in that, The fork has a bottom wall at the bottom of the mounting port, and the bottom wall is used to abut against the lower end of the support shaft in the locked state.

7. The quick-release structure according to claim 1, characterized in that, The quick-release structure also includes a connector having a first connection position and a second connection position spaced apart. The fork and the connector are rotatably connected at the first connection position, and the connector is adapted to be rotatably connected to the frame at the second connection position. In the locked state, the first connection bit is in front of the second connection bit.

8. The quick-release structure according to claim 1, characterized in that, A shock-absorbing assembly is provided between the upper and lower parts of the support shaft, and the shock-absorbing assembly is configured to provide elastic force along the axial direction of the support shaft.

9. The vehicle body, characterized in that, include: Frame; The quick-release structure as described in any one of claims 1 to 8; the support shaft is located at the front of the vehicle frame, and the positioning member is connected to the front of the vehicle frame.

10. A folding bicycle, characterized in that, include: The vehicle body as described in claim 9; Handlebars, the lower part of which is rotatably connected to the front part of the frame; The wheel, with the lower part of the fork connected to the wheel.

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