Tail hook structure of bicycle frame and using method of tail hook structure

Abstract

The invention relates to the technical field of bicycles, in particular to a tail hook structure of a bicycle frame and a using method thereof.The tail hook structure of the bicycle frame comprises a frame rear fork, a hub and a shaft rod, the frame rear fork is provided with a first supporting piece, a second supporting piece, a third supporting piece and a fourth supporting piece, and the supporting pieces are detachably installed on the two sides of the frame rear fork; the shaft rod penetrates through the supporting piece and the hub and is locked through the fixing and locking piece. The first supporting piece and the second supporting piece are provided with connecting parts, compensation pieces and elastic parts, the third supporting piece and the fourth supporting piece are also provided with connecting parts, and the frame rear fork is provided with a storage part for storing an idle tail hook; the invention further comprises a using method of the tail hook structure, and the supporting pieces can be replaced according to different using scenes to complete assembling. The bicycle tail hook structure achieves the technical effects that the bicycle tail hook structure is convenient to mount and dismount, adapts to different use scenes, and can compensate the gap and store the supporting piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bicycles, in particular to a tail hook structure of a bicycle frame and a use method thereof. BACKGROUND

[0002] In the current bicycle industry, the axle rod is a core component for connecting the wheel and the rear fork of the frame. According to the requirements of the use scene, it is divided into two categories: straight-through axle rod and cylinder axle rod. The straight-through axle rod has the characteristics of lightweight (single weight 20-40g) and quick disassembly and assembly, and is widely used in urban commuter vehicles and entry-level road vehicles, which meets the quick repair needs of daily low-intensity riding. The cylinder axle rod has stronger torsional and impact resistance by using a hollow thick rod (diameter 12 / 15 / 20mm) combined with a threaded or quick-release locking structure, and is suitable for professional mountain bikes and other high-intensity scenes, which can avoid the risk of axle rod loosening under severe vibration.

[0003] The tail hook of the rear fork of the frame is a key carrier for installing the axle rod, and its structure needs to be strictly matched with the type of the axle rod. With the increasing demand for the multifunctionality of bicycles by consumers, manufacturers gradually pursue a production mode of "one frame with multiple configurations", that is, by changing the type of the axle rod with the same frame, bicycles for different purposes can be produced, such as commuter vehicles with straight-through axle rods and off-road vehicles with cylinder axle rods, so as to reduce research and development costs and improve product competitiveness. At the same time, the hub is the installation basis of the axle rod, and the distance between the hub and the rear fork of the frame directly affects the selection of the axle rod. Different distances need to be matched with different specifications of the axle rod and the tail hook, which further highlights the importance of the adaptability of the tail hook. At present, the tail hook part of the rear fork of the bicycle frame cannot adapt to the two different installation methods of straight-through axle rod and cylinder axle rod, which makes it difficult to adapt different types of bicycles according to the same frame, resulting in low universality of the tail hook of the frame. SUMMARY

[0004] In order to improve the low universality of the tail hook part of the existing rear fork of the frame, which cannot change the type of the axle rod with the same frame, i.e., cannot produce bicycles for different purposes, the present application provides a tail hook structure of a bicycle frame and a use method thereof.

[0005] The present application provides a tail hook structure of a bicycle frame, which adopts the following technical solution: A bicycle frame tail hook structure includes a rear fork, a hub, and an axle. The rear fork includes a first support member and a second support member, and has a first side and a second side for accommodating accessories, respectively. The first support member is detachably mounted on the first side, and the second support member is detachably mounted on the second side. The axle passes through the first support member, the hub, and the second support member in sequence and is locked by a locking member. The rear fork also includes a third support member and a fourth support member, the third support member being detachably mounted on the first side, and the fourth support member being detachably mounted on the second side. The axle passes through the third support member, the hub, and the fourth support member in sequence and is fixed by a locking member.

[0006] By adopting the above technical solution, bidirectional compatibility between the rear fork thru-axle and the through-axle is achieved on the same frame, eliminating the need to develop dedicated frames for different axle types and significantly improving the production flexibility of vehicle manufacturers; ensuring the stable installation of tail hook components and avoiding displacement deviation; the axle assembly process is clear, and only the tail hook assembly needs to be replaced to switch the compatibility type, simplifying maintenance operations. At the same time, the detachable structure makes the frame appearance more regular and improves the overall aesthetics, effectively solving the problems of low versatility and single axle compatibility of traditional tail hooks.

[0007] Preferably, the first support member has a first connecting portion, which is installed inside the first side portion and is adapted to the first side portion; the first connecting portion is detachably connected to the rear fork of the frame via a first locking member; the second support member has a second connecting portion, which is installed inside the second side portion and is adapted to the second side portion; the second connecting portion is detachably connected to the rear fork of the frame via a second locking member; the third support member has a third connecting portion, which is installed inside the first side portion and is adapted to the first side portion; the third connecting portion is detachably connected to the rear fork of the frame via a first locking member; the fourth support member has a fourth connecting portion, which is installed inside the second side portion and is adapted to the second side portion; the fourth connecting portion is detachably connected to the rear fork of the frame via a second locking member.

[0008] By adopting the above technical solution, the first, second, third, and fourth support members of the rear fork of the frame can be adapted to the first and second sides of the rear fork of the frame through the first, second, third, and fourth connecting parts, respectively, and can be detachably connected through the first and second locking parts, so that the tail hook accessories are installed firmly, avoiding displacement deviation, and facilitating the replacement of tail hook accessories with different axles according to different usage scenarios, thereby improving the production flexibility of vehicle manufacturers and simplifying maintenance operations.

[0009] Preferably, the first support member is provided with a first compensation member, the first compensation member is embedded in the first support member, and the shaft passes through the first compensation member; the first compensation member is used to compensate for the gap between the shaft and the first support member; the second support member is provided with a second compensation member, the second compensation member is embedded in the second support member, and the shaft passes through the second compensation member; the second compensation member is used to compensate for the gap between the shaft and the second support member.

[0010] By adopting the above technical solution, the first support and the second support of the rear fork of the frame are respectively provided with a first compensation component and a second compensation component. The axle passes through the first compensation component and the second compensation component, which can compensate for the gap between the axle and the first support and the second support, reduce abnormal noise during riding, extend the service life of the tail hook and the axle, improve the installation stability of the axle, and solve the problem of insufficient matching accuracy between the existing tail hook accessories and the axle and the easy occurrence of gaps after long-term use.

[0011] Preferably, the first compensation member has a first guide portion, which is opened toward the shaft, and the first guide portion is used to accommodate the lubricant.

[0012] By adopting the above technical solution, a first compensation member is set on the first support member and the axle passes through it to compensate for the gap between the axle and the first support member. The first compensation member has a first guide portion facing the axle to accommodate the lubricant, which can reduce the wear when the axle is pulled out, ensure the fitting accuracy between the axle and the tail hook, reduce abnormal noise during riding, and extend the service life of the components.

[0013] Preferably, the first compensation member is provided with a first elastic part, which is embedded in the first compensation member. The first elastic part is elastic and is used to fill the tiny gap between the shaft and the first compensation member.

[0014] By adopting the above technical solution, when the axle is inserted into the first compensation component, the first elastic part is compressed and deformed, filling the tiny gap between the axle and the first compensation component. This can eliminate the gap between the axle and the tail hook, reduce riding noise, extend the service life of the component, improve the installation stability of the axle, and ensure fitting accuracy.

[0015] Preferably, the second compensation member has a second guide portion, which is opened toward the shaft and is used to accommodate the lubricant.

[0016] By adopting the above technical solution, a second guide portion facing the axle is opened on the second compensation component to accommodate the lubricant. Solid lubricant can be injected into the second guide portion when installing the axle, reducing wear when the axle is pulled out. This solves the problem of insufficient matching accuracy between existing tail hook accessories and axle and the easy occurrence of gaps after long-term use, improves the installation stability of the axle, reduces abnormal noises during riding, and extends the service life of the tail hook and axle.

[0017] Preferably, the second compensation member is provided with a second elastic part, which is embedded in the second compensation member. The second elastic part is elastic and is used to fill the tiny gap between the shaft and the second compensation member.

[0018] By adopting the above technical solution, a second elastic part is set on the second compensation component, which can fill the tiny gap between the axle and the second compensation component. This solves the problem of insufficient matching accuracy between the existing tail hook accessories and the axle, and the easy occurrence of gaps after long-term use. It improves the installation stability of the axle, reduces abnormal noise during riding, and extends the service life of the tail hook and the axle.

[0019] Preferably, a storage section is fixed on the rear fork of the frame for accommodating the first support member and the second support member or the third support member and the fourth support member; the storage section has a chamber, and a magnetic part is disposed in the chamber, and the first support member and the second support member or the third support member and the fourth support member are magnetically connected to the magnetic part; the first support member and the second support member are respectively equipped with a first code, and the third support member and the fourth support member are respectively equipped with a second code.

[0020] By adopting the above technical solution, the storage section on the rear fork of the frame can accommodate the first and second supports or the third and fourth supports. The magnetic part in the cavity enables the first and second supports or the third and fourth supports to be magnetically connected to it, realizing the adsorption and storage of idle tail hooks and preventing tail hook loss. The first code of the first and second supports and the second code of the third and fourth supports can realize the rapid identification of tail hook accessories, reduce the assembly error rate, reduce the additional procurement cost of tail hook accessories, and improve assembly efficiency and ease of use.

[0021] Preferably, the first support member has a first cone portion that is inserted into a first side portion; a first annular portion is formed on the surface of the first cone portion, and a set of pre-tightening elastic portions are embedded in the annular portion, and the pre-tightening elastic portions cover the first cone portion; the second support member has a second cone portion that is inserted into a second side portion; a second annular portion is formed on the surface of the second cone portion, and a set of pre-tightening elastic portions are also embedded in the second annular portion, and the pre-tightening elastic portions cover the second cone portion.

[0022] By adopting the above technical solution, the first cone of the first support is inserted into the first side, and the second cone of the second support is inserted into the second side, and the conical surface can eliminate radial clearance; the pre-tightening elastic part in the first annular part and the second annular part covers the first cone and the second cone, which can provide axial pre-tightening force when the cone is inserted into the tapered hole of the rear fork, improve the fatigue resistance of the connection, avoid loosening under high frequency vibration, achieve precise positioning and compensate for wear clearance.

[0023] A method of using a bicycle frame tail hook structure includes the following steps: S1: Determine the tail hook accessories based on the usage scenario; S2: Applied to high-intensity scenarios such as professional mountain biking and off-road racing, replace the first and second support components; S3: Insert the first connecting part of the first support member into the first side part, and use the first locking member to lock the first support member; S4: Insert the second connecting part of the second support into the second side part, and use the second locking member to lock the second support; S5: Apply lubricant to the part of the spool shaft that passes through the first support, the second support and the hub beforehand. Take the spool shaft from the shaft shaft, pass the spool shaft through the first support, the hub and the second support in sequence, and then lock it with the fastening parts to complete the assembly. S6: When used for urban commuting and entry-level road bikes, replace the third and fourth support components; S7: Insert the third connecting part of the third support into the first side and use the first locking member to lock the third support; S8: Insert the second connecting part of the fourth support into the second side and use the second locking member to lock the fourth support; S9: Lubricant is pre-applied to the parts where the straight-through axle passes through the third support, hub, and fourth support. The straight-through axle is then taken and passed through the third support, hub, and fourth support in sequence, and finally locked in place by the locking mechanism to complete the assembly. By adopting the above technical solution, suitable tail hook accessories can be determined and replaced according to different usage scenarios, achieving bidirectional compatibility between the thru-axle and straight-through axle of the same frame rear fork. This eliminates the need to develop dedicated frames for different axle types, significantly improving the production flexibility of motorcycle manufacturers. The axle assembly process is clear; only the tail hook assembly needs to be replaced to switch the compatibility type, simplifying maintenance operations. Pre-applying lubricant reduces wear on the axle and tail hook, extending the service life of components. Overall, it effectively solves the problems of low versatility and single axle compatibility of traditional tail hooks.

[0024] In summary, this application has the following beneficial effects: 1. The rear fork of the frame is equipped with two sets of detachable tail hook accessories. The appropriate tail hook accessory can be selected and replaced according to different usage scenarios, realizing bidirectional compatibility between thru-axle and through-axle of the same frame rear fork. There is no need to develop special frames for different axle types, which significantly improves the production flexibility of the vehicle manufacturer; the axle assembly process is clear, and only the tail hook set needs to be replaced to switch the compatibility type, simplifying maintenance operations; pre-applying lubricant can reduce wear on the axle and tail hook, extend the service life of the components, and effectively solve the problems of low versatility and single axle compatibility of traditional tail hooks. 2. The first support and the second support are respectively provided with a first compensation component and a second compensation component to compensate for the small gap between the axle and the support. The first compensation component and the second compensation component are respectively provided with a first elastic part and a second elastic part to fill the small gap between the axle and the compensation component, reduce the gap between the axle and the tail hook, reduce abnormal noise during riding, and extend the service life of the components. 3. The first support and the second support have a first cone and a second cone, respectively. The cone is inserted into the side and a pre-tightening elastic part is embedded in the annular part on the surface of the cone to improve the fatigue resistance of the connection and prevent loosening under high frequency vibration. 4. The rear fork of the frame is equipped with a storage compartment with a magnetic part, which can be used to store unused tail hooks. The first support, the second support, the third support, and the fourth support are respectively equipped with a first code and a second code, which can quickly distinguish the tail hook type, prevent tail hook loss and confusion, reduce the assembly error rate, and improve assembly efficiency and ease of use. Attached Figure Description

[0025] Figure 1 This is an overall structural view of Embodiment 1 of this application; Figure 2 This is an exploded view of the tail hook of the cylinder shaft in Embodiment 1 of this application; Figure 3 This is an exploded view of the straight-through tail hook in Embodiment 1 of this application; Figure 4 This is a partial view of Embodiment 2 of this application; Figure 5 This is a partial exploded view of Embodiment 2 of this application; Figure 6 This is an exploded view of the first compensation component in Embodiment 2 of this application; Figure 7 This is a structural view of the straight-through tail hook in Embodiment 2 of this application.

[0026] Explanation of reference numerals in the attached figures: 1. Rear fork of the frame; 11. First side section; 12. Second side section; 13. Locking device; 2. First support member; 21. First connecting part; 22. First limiting step; 23. First cone part; 24. First annular part; 25. Pre-tightening elastic part; 26. Fan-shaped groove; 3. Second support member; 31. Second connecting part; 32. Second limiting step; 33. Second cone part; 4. Third support member; 41. Third connecting part; 5. Fourth support member; 51. Fourth connecting part; 6. First locking element; 61. First locking bolt; 62. First quick-release component; 620. First quick-release body; 621. First button post; 622. First locking post; 623. First locking spring; 624. Hexagonal post; 63. First internal hexagonal bolt; 7. Second locking component; 71. Second locking bolt; 72. Second quick-release component; 73. Second socket head cap screw; 8. First compensation component; 81. First guide section; 82. First elastic section; 83. First flash; 9. Second compensation component; 91. Second guide section; 92. Second elastic section; 93. Second flash; 10. Shaft; 100. Cylindrical shaft; 101. Straight shaft. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1: This embodiment discloses a tail hook structure for a bicycle frame, see [link to documentation]. Figure 1 and Figure 2 The bicycle frame includes a rear fork 1, a hub, and an axle 10. The rear fork 1 includes a first support member 2 and a second support member 3, and has a first side portion 11 and a second side portion 12 for accommodating accessories. The first support member 2 is detachably mounted on the first side portion 11, and the second support member 3 is detachably mounted on the second side portion 12. The axle 10 passes sequentially through the first support member 2, the hub, and the second support member 3, and is locked by a locking member 13. The rear fork 1 also includes a third support member 4 and a fourth support member 5. The third support member 4 is detachably mounted on the first side portion 11, and the fourth support member 5 is detachably mounted on the second side portion 12. The axle 10 passes sequentially through the third support member 4, the hub, and the fourth support member 5, and is fixed by the locking member 13.

[0029] Specifically, see Figure 2 and Figure 3 The axle 10 consists of a thru-axle 100 and a straight-through axle 101. The thru-axle 100 is made of a hollow, thick rod material, suitable for high-intensity and high-vibration environments; while the straight-through axle 101 is made of a solid, thin rod, suitable for low-intensity riding scenarios. The first support member 2 includes a first thru-axle tail hook, and the second support member 3 includes a second thru-axle tail hook. These two components work together to form the tail hook accessory on the rear fork 1 that is adapted to the rear wheel thru-axle 100. The third support member 4 includes a first straight-through tail hook, and the fourth support member 5 includes a second straight-through tail hook. The first and second straight-through tail hooks work together to form the tail hook accessory on the rear fork 1 that is adapted to the straight-through axle 101.

[0030] The first side portion 11 is located on the right inner side of the rear fork 1 of the frame and includes a first side groove for limiting the displacement of the first thru-axle hook or the first straight-through hook relative to the axial direction of the rear fork 1 of the frame. The second side portion 12 is located on the left inner side of the rear fork 1 of the frame and includes a second side groove for limiting the displacement of the second thru-axle hook or the second straight-through hook relative to the axial direction of the rear fork 1 of the frame.

[0031] Further, see Figures 1 to 3The first support member 2 has a first connecting portion 21, which is installed inside the first side portion 11 and is adapted to the first side portion 11. The first connecting portion 21 is detachably connected to the rear fork 1 of the frame via a first locking member 6. The second support member 3 has a second connecting portion 31, which is installed inside the second side portion 12 and is adapted to the second side portion 31. The second connecting portion 31 is detachably connected to the rear fork 1 of the frame via a second locking member 7. The third support member 4 has a third connecting portion 41, which is installed inside the first side portion 11 and is adapted to the first side portion 11. The third connecting portion 41 is detachably connected to the rear fork 1 of the frame via a first locking member 6. The fourth support member 5 has a fourth connecting portion 51, which is installed inside the second side portion 12 and is adapted to the second side portion 12. The fourth connecting portion 51 is detachably connected to the rear fork 1 of the frame via a second locking member 7.

[0032] Specifically, see Figure 1 and Figure 2 The first connecting portion 21 and the third connecting portion 41 each include a first connecting plate, which is integrally formed with the first spool tail hook and adapted to the first side portion 11, or integrally formed with the first straight-through tail hook and adapted to the first side portion 11. This integrally formed design ensures the stability and reliability of the connecting portion structure and reduces safety hazards caused by loosening between components. The first spool tail hook and the first straight-through tail hook are each provided with a first limiting step 22, which respectively connects to the first connecting plate on their respective bodies and is adapted to the surface contour of the rear fork 1 of the frame. Its adaptability is not only reflected in the precise matching of dimensions, but also in the perfect fit of shape and curvature, thereby effectively limiting the vertical displacement of the first spool tail hook or the first straight-through tail hook relative to the rear fork 1 of the frame, ensuring the stability and handling of the vehicle during driving.

[0033] See Figure 2 and Figure 3 The second connecting portion 31 and the fourth connecting portion 51 each include a second connecting plate, which is integrally formed with the second thru-axle hook and adapted to the second side portion 12, or integrally formed with the second straight hook and adapted to the second side portion 12. Also employing an integral forming process, the second connecting portion possesses excellent structural strength. Both the second thru-axle hook and the second straight hook are provided with second limiting steps 32, which respectively connect to the second connecting plate on the mounting body and adapt to the surface contour of the rear fork 1 of the frame. Through this meticulous design, the second connecting portion, in conjunction with the second side portion 12, can precisely limit the vertical displacement of the second thru-axle hook or the second straight hook relative to the rear fork 1 of the frame, further improving the overall performance of the vehicle.

[0034] The locking component 13 includes a locking nut, which is threadedly connected to the threaded end of the cylindrical shaft 100 or the straight shaft 101. This threaded connection method is characterized by simple installation and easy disassembly, while providing a reliable fixing effect. In actual use, the operator only needs to perform a simple rotation operation to firmly fix the locking nut to the cylindrical shaft 100 or the straight shaft 101, ensuring the stability of the connection.

[0035] The first locking member 6 includes a first locking bolt 61, which passes sequentially through the first support member 2 and the rear fork 1 of the frame, and is threadedly connected to both the first support member 2 and the rear fork 1 of the frame, or passes sequentially through the third support member 4 and the rear fork 1 of the frame, and is threadedly connected to both the third support member 4 and the rear fork 1 of the frame. The presence of the first locking bolt 61 provides additional safety protection for the critical connection parts of the vehicle. During vehicle operation, when subjected to a large external impact, the first locking bolt 61 can prevent relative displacement between the first support member 2 or the third support member 4 and the rear fork 1 of the frame, thereby avoiding vehicle malfunctions caused by loose connections.

[0036] The second locking member 7 includes a second locking bolt 71, which passes sequentially through the second support member 3 and the rear fork 1 of the frame, and is threadedly connected to both the second support member 3 and the rear fork 1 of the frame, or passes sequentially through the fourth support member 5 and the rear fork 1 of the frame, and is threadedly connected to both the fourth support member 5 and the rear fork 1 of the frame. Similar to the first locking member 6, the second locking bolt 71 plays a crucial role in the vehicle's structure. It effectively enhances the connection strength between the second support member 3 or the fourth support member 5 and the rear fork 1 of the frame, improving the overall rigidity and stability of the vehicle. Whether driving on a smooth road or in complex road conditions, the second locking bolt 71 ensures that all components of the vehicle are tightly connected, providing the driver with a safe and reliable driving experience.

[0037] The working principle of this embodiment: First, suitable grooves are made on the first side 11 (right inner side) and the second side 12 (left inner side) of the rear fork 1 of the frame to limit the axial displacement of the tail hook accessory; at the same time, a connecting part with a connecting plate and a limiting step is designed for the tail hook accessory. The connecting plate is adapted to the side, and the limiting step fits the surface contour of the rear fork 1 of the frame to limit the vertical displacement.

[0038] The tail hook structure of this embodiment is configured with two sets of detachable tail hook accessories: one set consists of a first cylindrical tail hook (first support 2) and a second cylindrical tail hook (second support 3), which are adapted to the cylindrical shaft 100; the other set consists of a first straight-through tail hook (third support 4) and a second straight-through tail hook (fourth support 5), which are adapted to the straight-through shaft 101.

[0039] During assembly, if used in high-intensity off-road scenarios, insert the first connecting part 21 of the first spool tail hook into the first side part 11 and lock it with the first locking bolt 61 (first locking member 6). Insert the second connecting part 31 of the second spool tail hook into the second side part 12 and lock it with the second locking bolt 71 (second locking member 7). Then, pass the spool rod 100 through the first spool tail hook, the hub, and the second spool tail hook in sequence, and lock it with the threaded end of the spool rod 100 through the locking nut (locking member 13). If used in urban commuting scenarios, replace it with the first straight-through tail hook and the second straight-through tail hook. After repeating the above tail hook locking steps, pass the straight-through shaft rod 101 through the corresponding tail hook and the hub, and lock it with the locking nut and quick-release buckle.

[0040] This implementation scheme achieves bidirectional compatibility between the same frame rear fork's one pair of thru-axles 100 and straight-through axles 101, eliminating the need to develop dedicated frames for different axle types 10 and significantly improving the production flexibility of vehicle manufacturers. The combination of grooves, limiting steps, and locking bolts ensures the stable installation of the tail hook components and avoids displacement deviation. The axle 10 assembly process is clear, and only the tail hook assembly needs to be replaced to switch the compatibility type, simplifying maintenance operations. At the same time, the detachable structure makes the frame appearance more regular and improves the overall aesthetics, effectively solving the problems of low versatility and single axle 10 compatibility of traditional tail hooks.

[0041] Example 2: The differences between this embodiment and Implementation 1 are as follows: Specifically, see Figure 4 and Figure 5 The first support member 2 is provided with a first compensation member 8, which is embedded in the first support member 2, and the shaft 10 passes through the first compensation member 8; the first compensation member 8 is used to compensate for the gap between the shaft 10 and the first support member 2.

[0042] See Figure 5 and Figure 6 The first compensation component 8 includes a first bushing with a first flash 83 integrally formed with it. The first flash 83 is embedded in the first support 2 on one side of the rear fork 1 of the frame, thereby limiting the thrust applied when the axle 10 passes through the first bushing, preventing the first bushing from detaching from the second support 3, and achieving stable clearance compensation. The first flash 83 also limits the circumferential displacement of the first bushing, improving the stability of the first bushing on the first support 2.

[0043] Specifically, see Figure 5 and Figure 6The first compensating member 8 has a first guide portion 81, which faces the shaft 10 and is used to accommodate the lubricant. The second compensating member 9 has a second guide portion 91, which also faces the shaft 10 and is used to accommodate the lubricant. The first guide portion 81 includes a first semi-circular through groove formed on the inner wall of the first bushing, which extends along the axial direction of the first bushing. When installing the shaft 10, solid lubricant is injected into the first semi-circular through groove to reduce wear when the shaft 10 is pulled out.

[0044] Specifically, see Figure 5 and Figure 6 The second support member 3 is provided with a second compensation member 9, which is embedded in the second support member 3, and the shaft 10 passes through the second compensation member 9. The second compensation member 9 is used to compensate for the gap between the shaft 10 and the second support member 3. The second compensation member 9 includes a second bushing with a second flash 93, which is integrally formed with the second bushing. The second flash 93 is embedded in one side of the second support member 3 located inside the rear fork 1 of the frame, thereby limiting the thrust applied when the shaft 10 passes through the second bushing, preventing the second bushing from detaching from the second support member 3, and cooperating with the first bushing to achieve stable gap compensation. The second flash 93 is also used to limit the displacement of the second bushing in the circumferential direction, improving the stability of the second bushing on the second support member 3. The second guide portion 91 includes a second semi-circular through groove formed on the inner wall of the second bushing, which is provided through the second bushing in the axial direction. When installing the shaft 10, solid lubricant is injected into the second semi-circular through groove to reduce wear when the shaft 10 is pulled out.

[0045] Specifically, the first compensating member 8 is provided with a first elastic part 82, which is embedded in the first compensating member 8 and has elasticity, and is used to fill the tiny gap between the shaft 10 and the first compensating member 8. The second compensating member 9 is provided with a second elastic part 92, which is embedded in the second compensating member 9 and also has elasticity, and is used to fill the tiny gap between the shaft 10 and the second compensating member 9.

[0046] The first elastic part 82 includes a first elastic protrusion, which is embedded in the inner wall of the first bushing. The second elastic part 92 includes a second elastic protrusion, which is embedded in the inner wall of the second bushing. Both the first and second elastic protrusions are made of polyurethane, which has good elasticity and wear resistance. When the shaft 10 is inserted, the elastic protrusions are compressed and deformed, thereby filling the tiny gap between the shaft 10 and the bushing.

[0047] In practical applications, the precise design and reasonable layout of the first compensation component 8 and the second compensation component 9 play a crucial role in improving the performance of the entire mechanical structure. When the mechanical structure is in a high-frequency operating state, the friction between the shaft 10 and the first support component 2 and the second support component 3 will increase significantly. The clearance compensation function provided by the first compensation component 8 and the second compensation component 9 can effectively reduce the energy loss caused by this friction, reduce the heat generation of the mechanical structure, and thus extend its service life.

[0048] The first and second elastic protrusions are made of polyurethane, which not only has good elasticity and wear resistance, but also has a certain degree of anti-aging properties. During long-term use, even in the face of complex and changing working conditions, such as temperature changes, humidity changes, and mechanical vibrations, the polyurethane elastic protrusions can still maintain stable performance, continuously play the role of filling tiny gaps, and ensure that the fit between the shaft 10 and the bushing is always in the best condition.

[0049] Furthermore, the lubricant contained in the first guide section 81 and the second guide section 91 plays an indispensable role in the operation of the mechanical structure. The lubricant can form a lubricating film between the shaft 10 and the bushing, further reducing friction and wear. At the same time, the lubricant can also dissipate heat, carrying away the heat generated by the friction between the shaft 10 and the bushing in a timely manner, preventing the mechanical structure's performance from deteriorating due to localized overheating.

[0050] To ensure the stable operation of the first compensation component 8 and the second compensation component 9, regular inspection and lubrication replenishment of the first guide portion 81 and the second guide portion 91 are required during the maintenance of the mechanical structure. Simultaneously, the elasticity of the first elastic portion 82 and the second elastic portion 92 must be checked. If wear or aging is found on the elastic protrusions, they should be replaced promptly to ensure the normal operation and stable performance of the mechanical structure.

[0051] Specifically, a storage compartment is securely mounted on the rear fork 1 of the frame to accommodate the first support member 2 and the second support member 3, or the third support member 4 and the fourth support member 5. The storage compartment contains a chamber with a magnetic component inside. The first support member 2 and the second support member 3, or the third support member 4 and the fourth support member 5, are magnetically connected to the magnetic component. The first support member 2 and the second support member 3 each have a first code, while the third support member 4 and the fourth support member 5 each have a second code.

[0052] The storage unit includes a storage box, which is installed in the non-installation area of ​​the rear fork 1 of the frame. The magnetic part consists of a strong magnet built into the bottom of the chamber. The first thru-axle hook, the second thru-axle hook, the first straight-through hook, and the second straight-through hook are all made of iron-containing alloy. In the idle state, the first thru-axle hook and the second thru-axle hook, or the first straight-through hook and the second straight-through hook, can be magnetically attached to the chamber of the storage box, facilitating quick access to the hook for replacement when changing riding conditions, thereby improving portability.

[0053] In this embodiment, the first code is achieved by painting the surfaces of the first and second cylindrical tail hooks red and laser-engraving the word "cylinder" on their surfaces. The second code is achieved by painting the surfaces of the first straight-through tail hook and the second straight cylindrical tail hook blue and laser-engraving the word "straight-through shaft" on their surfaces. The above design utilizes a storage box with a magnetic cavity to fix and store idle tail hooks, and uses color coding and laser marking to quickly distinguish tail hook accessories. This effectively solves the problems of easy confusion during installation of the two sets of tail hook accessories and easy loss or damage when idle, reduces the assembly error rate, reduces the additional procurement cost of tail hook accessories, and improves assembly efficiency and ease of use.

[0054] Specifically, the first support member 2 has a first conical portion 23, which is inserted into the first side portion 11. A first annular portion 24 is formed on the surface of the first conical portion 23, and at least one set of pre-tightening elastic portions 25 are embedded within the annular portion, with the pre-tightening elastic portions 25 fitting around the first conical portion 23. The second support member 3 has a second conical portion 33, which is inserted into the second side portion 12. A second annular portion is formed on the surface of the second conical portion 33, and at least one set of pre-tightening elastic portions 25 are also embedded within it, with the pre-tightening elastic portions 25 fitting around the second conical portion 33.

[0055] The first conical portion 23 includes a first conical post that protrudes from the surface of the first support member 2. The first annular portion 24 includes a first annular groove formed on the outer surface of the first conical post. Each set of pre-tensioning elastic portions 25 includes a pre-tensioning spring that is sleeved on the first conical post and has one end embedded in the first annular groove.

[0056] The second conical portion includes a second conical post that protrudes from the surface of the second support member 3. The second annular portion includes a second annular groove formed on the outer surface of the second conical post. A preload spring is fitted onto the second conical post, with one end embedded in the second annular groove.

[0057] When the conical protrusions of the first and second conical posts are inserted into the corresponding conical holes on the rear fork, the conical surfaces self-position to eliminate radial clearance, and the preload spring is compressed to generate a continuous axial preload force, filling the minute axial clearance. Simultaneously, the first locking member 6 locks the first support member 2, and the second locking member 7 locks the second support member 3, restricting the axial and circumferential movement of the first and second cylinder shaft tail hooks. This structure achieves precise positioning through the conical surfaces, and the preload spring compensates for wear clearance.

[0058] The locking mechanism ensures a secure connection between the tail hook and the rear fork 1 of the frame, effectively preventing loosening due to vibration during riding. In practical use, when the tail hook needs to be replaced for different riding scenarios, the operator simply retrieves the corresponding coded tail hook from the storage box. The retrieval process is quick and easy due to the magnetic connection between the tail hook and the magnetic part within the storage box. The retrieved tail hook is then inserted into the corresponding side of the rear fork 1 through its tapered section. The tapered self-positioning function quickly and accurately positions the tail hook in the appropriate position. Simultaneously, the preload spring begins to function. As the tail hook is inserted, the preload spring is gradually compressed, generating a continuous axial preload force that fills any minor axial gaps between the tail hook and the rear fork 1, ensuring a tight connection.

[0059] Subsequently, the tail hook is securely locked using appropriate locking components, further restricting its movement in the axial and circumferential directions. This ensures the reliability of the connection between the tail hook and the rear fork 1 of the frame, even in complex and varied riding environments, greatly improving riding safety and stability.

[0060] In addition, this tail hook structure and its usage method are highly versatile and scalable. By adjusting the size of the storage box and the layout of the magnetic part, the number and types of tail hooks stored can be easily increased or decreased to meet the diverse needs of different user groups and riding scenarios.

[0061] Specifically, see Figures 4 to 6 The first locking component 6 consists of a first quick-release component 62 and a first hex socket head cap screw 63. The first hex socket head cap screw 63 passes sequentially through the rear fork 1 and the first connecting part 21 of the frame, and is threadedly connected to the rear fork 1 and the first connecting part 21 of the frame, respectively. The first quick-release component 62 passes sequentially through the rear fork 1 and the first connecting part 21 of the frame, and is engaged with the first connecting part 21.

[0062] The first quick-release component 62 includes a first quick-release body 620, a first button post 621, two first locking posts 622, and a first locking spring 623. The first quick-release body 620 is inserted into the rear fork 1 of the bicycle frame and contacts the outer surface of the rear fork 1. The first button post 621 passes through the first quick-release body 620 and is rotatably connected to it; its end passes through the rear fork 1 and the first connecting part 21 in sequence and is rotatably connected to the first connecting part 21. The two first locking posts 622 protrude from the outer surface of the first button post 621 and are arranged in a cross shape. The end of the first connecting part 21 away from the contact with the first side part 11 is provided with two fan-shaped grooves 26. Each first locking post 622 engages with one fan-shaped groove 26. The fan-shaped groove 26 is provided with a slot that matches the first locking post 622, further restricting the displacement of the first locking post 622.

[0063] The first button post 621 passes through the first quick-release body 620. A first limiting piece is welded to the outer surface near the first locking post 622 to restrict the axial movement of the first button post 621 relative to the first quick-release body 620. The first quick-release body 620 has a locking spring receiving cavity, in which the first locking spring 623 is installed and fitted onto the first button post 621. The first locking spring 623 applies a reaction force to the first button post 621, causing the first locking post 622 to engage with the fan-shaped groove 26, thus restricting the axial movement of the first button post 621. Only by applying a downward pressure greater than the elastic force of the first locking spring 623 can the first button post 621 be rotated, causing the first locking post 622 to disengage from the fan-shaped groove 26, thereby removing the first quick-release component 62 and unlocking the first support member 2.

[0064] In addition, a hexagonal post 624 protrudes from one end of the first button post 621 near the first locking post 622, which is used to remove the first internal hex bolt through the first quick-release component 62 in the absence of a hex wrench, providing the user with a spare tool.

[0065] When it is necessary to remove the first hex socket head cap screw 63, if a hex wrench is not available on site, the user can align the hexagonal post 624 in the first quick-release component 62 with the head of the first hex socket head cap screw 63. Utilizing the compatibility between the hexagonal post 624 and the head of the first hex socket head cap screw 63, the user can rotate the first knob post 621 to rotate the hexagonal post 624, thereby removing the first hex socket head cap screw 63. This design greatly facilitates the user's operation in special circumstances and avoids the inconvenience of not being able to disassemble due to a lack of special tools.

[0066] In actual use, when it is necessary to unlock the first support member 2 from the rear fork 1 of the frame, the user only needs to apply a downward pressure greater than the elastic force of the first locking spring 623 as described above, rotate the first button 621, and make the first locking pin 622 disengage from the fan-shaped groove 26, so that the first quick-release component 62 can be easily removed, and the unlocking operation of the first support member 2 can be completed. The whole process is simple and quick, without complicated operating steps, which greatly improves the convenience and efficiency of use.

[0067] Meanwhile, the design of this tail hook structure also fully considers stability and safety. The tight connection between the first quick-release component 62 and the rear fork 1 and the first connecting part 21, as well as the restriction of the axial movement of the first locking spring 623 on the first pivot 621, ensure that the first support 2 will not loosen or fall off unexpectedly during use, providing strong protection for riding safety.

[0068] Specifically, the second locking member 7 consists of a second quick-release component 72 and a second hexagon socket head cap screw 73. The second hexagon socket head cap screw 73 passes sequentially through the rear fork 1 and the second connecting portion 31 of the frame, and is threadedly connected to the rear fork 1 and the second connecting portion 31, respectively. The second quick-release component 72 also passes sequentially through the rear fork 1 and the second connecting portion 31 of the frame, and engages with the second connecting portion 31. In this embodiment, the structure of the second quick-release component 72 is the same as that of the first quick-release component 62, and the corresponding second connecting portion 31 is also provided with two fan-shaped grooves 26 to facilitate the engagement of the second quick-release component 72.

[0069] See Figures 5 to 7 In the third support member 4 and the fourth support member 5, the structures of the first connecting part 21 and the second connecting part 31 are the same as those of the first support member 2 and the second support member 3, respectively, all including a cone, a preload spring and a code. The difference is that the third support member 4 is not equipped with the first compensation part 8, while the fourth support member 5 is not equipped with the second compensation part 9.

[0070] In the actual assembly process, the conical part of the first connecting part 21 of the third support member 4 is first inserted into the corresponding position of the rear fork 1 of the frame. The preload spring then functions to ensure a tight fit between the first connecting part 21 and the rear fork 1 of the frame. Simultaneously, the assembly position and status can be accurately identified through coding. Next, the second connecting part 31 of the fourth support member 5 is assembled to the rear fork 1 of the frame in the same manner. Since the third support member 4 lacks the first compensation part 8, it relies primarily on the elastic deformation of the preload spring to make a certain degree of adaptive adjustment when encountering minor dimensional deviations. Similarly, the fourth support member 5, lacking the second compensation part 9, also achieves a similar function through the preload spring to ensure a stable connection between the entire tail hook structure and the rear fork 1 of the frame. After all the supports are assembled, the second locking part 7 is installed. Through the threaded connection of the second hexagonal socket bolt 73 and the snap-fit ​​of the second quick-release component 72, the robustness and stability of the connection between the tail hook structure and the rear fork 1 of the frame are further enhanced, ensuring that the tail hook structure will not loosen or fall off during bicycle use, thus guaranteeing safe and smooth riding.

[0071] The working principle of this embodiment: Based on Example 1, Example 2 improves the tail hook function through multi-structure optimization.

[0072] Specifically, firstly, a first bushing (copper-based self-lubricating bushing, including a first flash 83 and a first semi-circular through groove) and a second bushing (including a second flash 93 and a second semi-circular through groove) are respectively embedded in the first support member 2 (first cylindrical shaft tail hook) and the second support member 3 (second cylindrical shaft tail hook). The inner wall of the bushing is provided with polyurethane elastic protrusions. When the shaft 10 passes through the bushing, the elastic protrusions are squeezed and deformed to fill the gap, and solid lubricant is injected into the semi-circular through groove to reduce wear; secondly, the tail hook connecting part is designed as a conical column (first conical part 23 / second conical part 33). The tapered column has an annular groove on its surface and a preload spring is fitted inside. When the tapered column is inserted into the tapered hole of the rear fork, the tapered surface eliminates radial clearance, and the preload spring provides axial preload force. Thirdly, the locking mechanism uses a combination of "internal hex bolts + quick-release components." The quick-release components engage with the tail hook's fan-shaped groove 26 via a button post, cross-shaped distributed locking posts, and a locking spring, enabling tool-free quick assembly and disassembly. Fourthly, the rear fork 1 of the frame has a storage box with a strong magnetic block for storing unused tail hooks (containing iron alloy material). The tail hook surface is distinguished by red / blue paint and laser marking. During assembly, the tail hook assembly is selected according to the scenario. Precise positioning is achieved through the tapered column and preload spring. Bushings and elastic protrusions ensure fitting accuracy. Quick-release components simplify assembly and disassembly, and the storage box and coding design facilitate tail hook management.

[0073] Based on Embodiment 1, this technical solution further addresses the core defects of traditional tail hooks: the combination of bushing and elastic protrusion eliminates the gap between the axle 10 and the tail hook, reducing riding noise and extending component life; the tapered column and pre-tensioned spring enhance the connection's fatigue resistance and prevent loosening under high-frequency vibration; quick-release components replace traditional bolts, allowing tail hook replacement without tools and improving emergency maintenance convenience; the storage box and coding design prevent tail hook loss and confusion, reducing assembly error rate. Overall, it achieves multiple functions such as high-precision adaptation, convenient disassembly and assembly, long-term durability, and standardized management, further optimizing the versatility and practicality of the frame tail hook.

[0074] Example 3 This embodiment provides a method for using a bicycle frame tail hook structure, applied to Embodiment 1, including the following steps: S1: Determine the tail hook accessories based on the usage scenario; S11: The usage scenarios are divided into high-intensity, high-vibration and low-intensity riding scenarios; for high-intensity scenarios, the tail hook accessory group consisting of the first spool tail hook and the second spool tail hook is selected. This accessory group is compatible with the spool rod 100 made of hollow thick rod; for low-intensity scenarios, the tail hook accessory group consisting of the first straight-through tail hook and the second straight-through tail hook is selected. This accessory group is compatible with the straight-through rod 101 made of solid thin rod. S12: The first side 11 of the rear fork 1 of the frame has a first side groove on its right inner side, which is used to limit the displacement of the first thru-axle hook or the first straight-through hook relative to the axial direction of the rear fork 1 of the frame; the second side 12 has a second side groove on its left inner side, which is used to limit the displacement of the second thru-axle hook or the second straight-through hook relative to the axial direction of the rear fork 1 of the frame. S2: Applied to high-intensity scenarios such as professional mountain biking and off-roading, replace with the first support piece 2 and the second support piece 3; S21: The first support member 2 has a first connecting part 21, the first connecting part 21 includes a first connecting plate integrally formed with the tail hook of the first cylinder shaft, and the first connecting plate is adapted to the first side groove; S22: The first thru-axle tail hook is provided with a first limiting step 22, which is connected to the first connecting plate and is adapted to the surface contour of the rear fork 1 of the frame, and is used to cooperate with the first side 11 to limit the displacement of the first thru-axle tail hook relative to the rear fork 1 of the frame in the vertical direction. S23: The second support member 3 has a second connecting part 31, the second connecting part 31 includes a second connecting plate integrally formed with the tail hook of the second cylinder shaft, and the second connecting plate is adapted to the second side groove; S24: The second thru-axle tail hook is provided with a second limiting step 32, which is connected to the second connecting plate and is adapted to the surface contour of the rear fork 1 of the frame, and is used to cooperate with the second side 12 to limit the displacement of the second thru-axle tail hook relative to the rear fork 1 of the frame in the vertical direction. S3: Insert the first connecting part 21 of the first support member 2 into the first side part 11, and use the first locking member 6 to lock the first support member 2; S31: Ensure that the first connecting plate is fully fitted with the first side groove and that the first limiting step 22 is in close contact with the surface contour of the rear fork 1 of the frame; S32: Take the first locking bolt 61, pass the first locking bolt 61 through the first spool tail hook and the rear fork 1 of the frame in sequence, so that the first locking bolt 61 is threadedly connected to the first support 2 and the rear fork 1 of the frame respectively, and tighten the bolt until the first support 2 is no longer loose, thus completing the locking of the first support 2. S4: Insert the second connecting part 31 of the second support member 3 into the second side part 12, and use the second locking member 7 to lock the second support member 3; S41: Ensure that the second connecting plate is fully fitted with the second side groove and that the second limiting step 32 is in close contact with the surface contour of the rear fork 1 of the frame; S42: Take the second locking bolt 71 and pass the second locking bolt 71 through the second spool tail hook and the rear fork 1 of the frame in sequence, so that the second locking bolt 71 is threadedly connected to the second support 3 and the rear fork 1 of the frame respectively. Tighten the bolt until the second support 3 is no longer loose, and the locking of the second support 3 is completed. S5: Apply lubricant to the part of the cylindrical shaft 100 that passes through the first support 2, the second support 3 and the hub in advance. Take the cylindrical shaft 100 from the shaft 10 and pass it through the first support 2, the hub and the second support 3 in sequence. Then lock it with the locking member 13 to complete the assembly. S51: Take the locking nut, thread the locking nut to the threaded end of the cylinder shaft 100, and tighten the locking nut until the cylinder shaft 100 has no axial movement, thus completing the assembly under high-strength conditions. S6: When used for urban commuting and entry-level road bikes, replace with the third support 4 and the fourth support 5; S61: The third support member 4 has a third connecting part 41, the third connecting part 41 includes a first connecting plate integrally formed with the first through tail hook, and the first connecting plate is adapted to the first side groove. S62: The first straight tail hook is provided with a first limiting step 22, which is connected to the first connecting plate and is adapted to the surface contour of the rear fork 1 of the frame, and is used to cooperate with the first side 11 to limit the displacement of the first straight tail hook relative to the rear fork 1 of the frame in the vertical direction. S63: The fourth support member 5 has a fourth connecting part 51, the fourth connecting part 51 includes a second connecting plate integrally formed with the second straight through tail hook, and the second connecting plate is adapted to the second side groove. S64: The second straight-through tail hook is provided with a second limiting step 32, which is connected to the second connecting plate and is adapted to the surface contour of the rear fork 1 of the frame, and is used to cooperate with the second side 12 to limit the displacement of the second straight-through tail hook relative to the rear fork 1 of the frame in the vertical direction. S7: Insert the third connecting part 41 of the third support member 4 into the first side part 11, and use the first locking member 6 to lock the third support member 4. S71: Place the first connecting plate of the third support 4 into the first side groove, ensuring that the first connecting plate is completely fitted with the first side groove and that the first limiting step 22 is in close contact with the surface contour of the rear fork 1 of the frame; take the first locking bolt 61 and pass the first locking bolt 61 through the first straight tail hook and the rear fork 1 of the frame in sequence, so that the first locking bolt 61 is threadedly connected to the third support 4 and the rear fork 1 of the frame respectively, and tighten the bolt until the third support 4 is no longer loose, thus completing the locking of the third support 4; S8: Insert the second connecting part 31 of the fourth support member 5 into the second side part 12, and use the second locking member 7 to lock the fourth support member 5. S81: Place the second connecting plate of the fourth support member 5 into the second side groove, ensuring that the second connecting plate and the second side groove are completely fitted together, and that the second limiting step 32 is in close contact with the surface contour of the rear fork 1 of the frame; take the second locking bolt 71, and pass the second locking bolt 71 through the second straight tail hook and the rear fork 1 of the frame in sequence, so that the second locking bolt 71 is threadedly connected to the fourth support member 5 and the rear fork 1 of the frame respectively, and tighten the bolt until the fourth support member 5 is no longer loose, thus completing the locking of the fourth support member 5; S9: Apply lubricant to the part of the straight shaft 101 that passes through the third support 4, the hub and the fourth support 5 in advance. Take the straight shaft 101 in the shaft 10. The straight shaft 101 passes through the third support 4, the hub and the fourth support 5 in sequence, and then locks it with the locking part 13 to complete the assembly. S91: Insert the straight shaft 101 from one side of the first straight tail hook, and pass it through the third support 4, the center hole of the hub, and the second straight tail hook in sequence, until the threaded end of the straight shaft 101 is completely out of the fourth support 5; take the locking nut, thread the locking nut to the threaded end of the straight shaft 101, tighten it initially, and press the quick-release buckle on the straight shaft 101 so that the quick-release buckle fits against the surface of the fourth support 5, ensuring that the straight shaft 101 has no axial movement or radial loosening, and complete the assembly in the low-strength scenario.

[0075] Example 4 The usage method of this embodiment is applied to Embodiment 2, and differs from the usage method of Embodiment 3 in that: S1: Determine the tail hook accessories based on the usage scenario; S11: The usage scenarios are divided into high-intensity, high-vibration, and low-intensity riding scenarios; for high-intensity scenarios, the first support member 2 with the first compensation member 8, the first cone 23 and the first code and the second support member 3 with the second compensation member 9, the second cone 33 and the first code are selected, which are compatible with the hollow thick rod cylindrical shaft 100; for low-intensity scenarios, the third support member 4 with the first compensation member 8, the first cone 23 and the second code and the fourth support member 5 with the second compensation member 9, the second cone 33 and the second code are selected, which are compatible with the solid thin rod straight shaft 101. S12: The non-installation area of ​​the rear fork 1 of the frame is equipped with a storage compartment. The bottom of the chamber has a built-in magnetic part, which can attract and store idle tail hooks made of iron alloy material. The first code is painted in red and has a "thru-shaft" laser mark, and the second code is painted in blue and has a "straight-through shaft" laser mark. The tail hook type can be quickly distinguished by the code to avoid confusion. S2: Applied to high-intensity scenarios such as professional mountain bike off-roading. First, take out the first spool tail hook and the second spool tail hook from the storage box. After confirming that the red paint and the "spool" marking are correct, prepare for assembly. S21: The first connecting part 21 of the first support member 2 is provided with a first cone part 23, and a first annular groove is opened on the outer surface of the first cone column, and a pre-tightening elastic part 25 is pre-installed in the groove; S22: A first compensation member 8 is embedded on the first support member 2, namely a first bushing made of copper-based self-lubricating material. The first bushing is integrally formed with a first flash 83. The first flash 83 is embedded in the side of the first support member 2 facing the outside of the rear fork 1 of the frame. A first elastic part 82 is embedded in the inner wall of the first bushing, namely a first elastic protrusion made of polyurethane material, and a first guide part 81 is provided along the axial direction. S23: The second connecting part 31 of the second support member 3 is provided with a second cone part 33, and a second annular groove is opened on the outer surface of the second cone column, and a pre-tensioned spring is pre-installed in the groove; a second compensation member 9 is embedded on the second support member 3, namely a second bushing made of copper-based self-lubricating material, and the second bushing is integrally formed with a second flash 93, which is embedded in the side of the second support member 3 facing the inner side of the rear fork 1 of the frame; a second elastic part 92 is embedded in the inner wall of the second bushing, namely a second elastic protrusion made of polyurethane material, and a second guide part 91 is opened along the axial direction; S3: Assemble the compensation component and pre-tightening structure to complete the initial positioning of the first support 2 and the first side 11; S31: The first compensation member 8, which has been equipped with the first elastic part 82, is assembled onto the first support member 2 and pressed tightly; simultaneously, the second support member 3, which has been equipped with the second elastic part 92, is assembled onto the second support member 3 and pressed tightly; lubricant is injected into the first guide part 81 and the second guide part 91. S310: Insert the first bushing with the pre-installed first elastic protrusion into the mounting hole of the first support 2, ensuring that the first flash 83 is fully embedded in the outer surface of the first support 2, press the bushing until there is no looseness, and limit the circumferential and axial displacement of the first bushing; simultaneously insert the second bushing with the pre-installed second elastic protrusion into the mounting hole of the second support 3, ensuring that the second flash 93 is fully embedded in the inner surface of the second support 3, and press until there is no looseness; inject solid lubricant, such as graphite-based lubricant, into the first semi-circular through groove of the first bushing and the second semi-circular through groove of the second bushing, filling 2 / 3 of the through groove volume to reduce the subsequent insertion and removal wear of the shaft 10; S32: Align the first support 2 and the second support 3 that have been assembled with the pre-tightened elastic part 25, so that the first cone 23 is aligned with the first side 11 and the second cone 33 is aligned with the second side 12. S320: Hold the first support member 2 and align the first tapered post with the tapered hole on the first side 11 of the rear fork 1 of the frame, ensuring that the preload spring in the first annular groove is in a naturally extended state; simultaneously hold the second support member 3 and align the second tapered post with the tapered hole on the second side 12, ensuring that the tapered parts on both sides are coaxial with the tapered hole; slowly push the first support member 2 and the second support member 3 to insert the tapered post into the tapered hole until the tapered surfaces of the first tapered post and the second tapered post are completely in contact. At this time, the preload spring is compressed and contracted by the tapered hole, generating axial preload force, filling the small axial gap, and achieving radial self-positioning; S33: The first locking member 6 passes through the rear fork 1 and the first connecting part 21 of the frame in sequence to lock, and the second locking member 7 passes through the rear fork 1 and the second connecting part 31 of the frame in sequence to lock.

[0076] S330: Take the first quick-release component 62 and the first internal hex bolt 63, first pass the first internal hex bolt 63 through the first connecting part 21 of the rear fork 1 and the first support 2 in sequence, and screw it in until the bolt head is in contact with the surface of the rear fork 1, and control the torque at 5-8 N·m. S331: Insert the first quick-release body 620 of the first quick-release component 62 into the outer hole of the rear fork 1 of the frame, so that the first button post 621 passes through the first quick-release body 620, the rear fork 1 of the frame, and the first connecting part 21, until the two cross-shaped first locking posts 622 on the first button post 621 are aligned with the fan-shaped groove 26 of the first connecting part 21; press the first button post 621 to overcome the elasticity of the first locking spring 623 and rotate it 90°, so that the first locking posts 622 are engaged in the fan-shaped groove 26. After releasing, the first locking spring 623 returns to its original position, restricting the axial movement of the first button post 621; the first limiting piece on the first button post 621 fits against the first quick-release body 620 to prevent the button post from moving; simultaneously take the second quick-release component 72 and the second internal hex bolt 73, repeat the above operation to lock the second support 3, and complete the double locking of the first support 2 and the second support 3.

[0077] S4: Repeat the locking operation of the second support 3 in S32-S33, which has been completed synchronously in S3. This is a confirmation step to ensure that the second support 3 is not loose, the tapered column and the tapered hole fit tightly, and the quick-release parts are snapped into place.

[0078] S5: Complete the assembly of the 100mm cylinder shaft to achieve high-strength scenario adaptation; S51: Apply a small amount of grease to the surface of the cylinder shaft 100 beforehand. Take the cylinder shaft 100 and insert it from the first bushing side of the first support 2. It passes through the first bushing, the center hole of the hub, and the second bushing in sequence. At this time, the first elastic protrusion is squeezed and deformed to fill the gap between the cylinder shaft 100 and the bushing. The second elastic protrusion deforms synchronously to compensate for the gap until the threaded end of the cylinder shaft 100 completely passes through the second bushing. S52: Use a locking nut to connect to the threaded end, tighten it until there is no axial movement of the cylinder shaft 100, and control the torque at 10-12 N·m to complete the high-strength scene assembly; S51: If disassembly is required later, first unscrew the locking nut, pull out the cylindrical shaft 100, press the first button 621 of the first quick-release component 62 and rotate it 90° to disengage the locking pin from the fan-shaped groove 26, remove the quick-release component, and then use a wrench to unscrew the first internal hex bolt 63. If a wrench is not available, the hexagonal post 624 at the end of the first button 621 can be used for disassembly to remove the first support 2 and the second support 3, which can then be placed back into the storage box for magnetic fixation.

[0079] S6: When used for urban commuting and entry-level road bikes, first remove the first support 2, the second support 3 and the spool rod 100 according to the disassembly steps of S5. Then take out the third support 4 and the fourth support 5 with the second code from the storage box, namely the first straight-through tail hook and the second straight-through tail hook with blue paint and the "straight-through shaft" marking. Then put the removed first support 2 and second support 3 into the storage box. S61: The structure of the first connecting part 21 and the second connecting part 31 of the third support 4 and the fourth support 5 is the same as that of the first support 2 and the second support 3, including a tapered part, a pre-tightening spring and a code, and is matched with the straight shaft 101. After confirming that the code is correct, it is ready for assembly.

[0080] S7: Refer to the operations in S31-S33 to complete the locking of the third support 4 and the first side 11; Insert the first conical part 23 of the third support 4 into the conical hole of the first side part 11, and the pre-tightening spring compresses to generate a pre-tightening force; first screw in the first internal hex bolt 63, and then install the first quick-release part 62, so that the first locking post 622 is engaged in the fan-shaped groove 26 of the third connecting part 41, ensuring that the third support 4 is not loose, the first elastic protrusion of the first bushing and the first guide part 81 are in a ready-to-fit state, and the first guide part 81 is filled with solid lubricant.

[0081] S8: Refer to the operations in S31-S33 to complete the locking of the fourth support 5 and the second side 12; Insert the second conical part 33 of the fourth support member 5 into the conical hole of the second side part 12, and pre-tighten it by means of the pre-tightening spring; screw in the second internal hex bolt 73 and install the second quick-release part 72, so that the second locking post is engaged in the fan-shaped groove 26 of the fourth connecting part 51, ensuring that the fourth support member 5 fits tightly, the second elastic protrusion of the second bushing and the second guide part 91 work normally, and the second guide part 91 is filled with solid lubricant.

[0082] S9: Complete the assembly of straight shaft 101 to achieve low-strength scenario adaptation; S91: Apply grease to the surface of the straight shaft 101 beforehand, insert it from the third support 4, and pass through the third support 4, the center hole of the hub and the fourth support 5 in sequence, until the threaded end of the straight shaft 101 passes out of the fourth support 5. S92: Initially tighten the locking nut and threaded end to achieve a torque of 3-5 N·m. Then, press the quick-release buckle of the straight shaft 101 to ensure that the buckle fits against the surface of the third support 4, ensuring that the straight shaft 101 has no radial loosening or axial movement. For subsequent disassembly, open the quick-release buckle, unscrew the locking nut, pull out the straight shaft 101, and remove the third support 4 and the fourth support 5 according to the quick-release component disassembly steps in S5. Place them back in the storage box for adsorption and storage, completing the scene switch.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A bicycle frame tail hook structure, comprising a rear fork (1), a hub, and an axle (10), characterized in that: The rear fork (1) of the frame includes a first support (2) and a second support (3), and the rear fork (1) of the frame has a first side (11) and a second side (12) for accommodating accessories respectively; The first support member (2) is detachably installed on the first side (11), and the second support member (3) is detachably installed on the second side (12); The shaft (10) passes through the first support (2), the hub and the second support (3) in sequence, and is locked by the locking member (13); The rear fork (1) of the frame also includes a third support (4) and a fourth support (5). The third support (4) is detachably mounted on the first side (11), and the fourth support (5) is detachably mounted on the second side (12). The shaft (10) passes through the third support (4), the hub and the fourth support (5) in sequence, and is fixed by the locking member (13).

2. The bicycle frame tail hook structure according to claim 1, characterized in that: The first support member (2) has a first connecting part (21), which is installed inside the first side part (11), and the first side part (11) is adapted to the first connecting part (21); The first connecting part (21) is detachably connected to the rear fork of the frame (1) via the first locking member (6); The second support member (3) has a second connecting part (31), which is installed inside the second side part (12), and the second side part (12) is adapted to the second connecting part (31); The second connecting part (31) is detachably connected to the rear fork of the frame (1) via the second locking member (7); The third support (4) has a third connecting part (41), which is installed inside the first side part (11) and is adapted to the first side part (11); The third connecting part (41) is detachably connected to the rear fork of the frame (1) through the first locking member (6); The fourth support member (5) has a fourth connecting part (51), which is installed inside the second side part (12) and is adapted to the second side part (12); The fourth connecting part (51) is detachably connected to the rear fork of the frame (1) via the second locking member (7).

3. The bicycle frame tail hook structure according to claim 1, characterized in that: The first support member (2) is provided with a first compensation member (8), the first compensation member (8) is embedded in the first support member (2), and the shaft (10) passes through the first compensation member (8); the first compensation member (8) is used to compensate for the gap between the shaft (10) and the first support member (2); The second support member (3) is provided with a second compensation member (9), which is embedded in the second support member (3), and the shaft (10) passes through the second compensation member (9); the second compensation member (9) is used to compensate for the gap between the shaft (10) and the second support member (3).

4. The bicycle frame tail hook structure according to claim 3, characterized in that: The first compensation member (8) is provided with a first guide portion (81), which is opened toward the shaft (10) and is used to accommodate the lubricant.

5. The bicycle frame tail hook structure according to claim 4, characterized in that: The first compensation member (8) is provided with a first elastic part (82), which is embedded in the first compensation member (8). The first elastic part (82) is elastic and is used to fill the tiny gap between the shaft (10) and the first compensation member (8).

6. The bicycle frame tail hook structure according to claim 3, characterized in that: The second compensation member (9) is provided with a second guide (91), which is opened toward the shaft (10) and is used to accommodate the lubricant.

7. The bicycle frame tail hook structure according to claim 6, characterized in that: The second compensation member (9) is provided with a second elastic part (92), which is embedded in the second compensation member (9). The second elastic part (92) is elastic and is used to fill the tiny gap between the shaft (10) and the second compensation member (9).

8. The bicycle frame tail hook structure according to claim 1, characterized in that: The rear fork (1) of the frame is fixedly provided with a storage section for accommodating the first support (2) and the second support (3) or the third support (4) and the fourth support (5); The storage unit has a chamber, and a magnetic part is provided in the chamber. The first support (2) and the second support (3) or the third support (4) and the fourth support (5) are magnetically connected to the magnetic part, respectively. The first support member (2) and the second support member (3) each have a first code, and the third support member (4) and the fourth support member (5) each have a second code.

9. The bicycle frame tail hook structure according to claim 1, characterized in that: The first support member (2) has a first cone (23) which is inserted into the first side portion (11); A first annular portion (24) is provided on the surface of the first conical portion (23), and a set of pre-tightening elastic portions (25) are embedded in the annular portion, and the pre-tightening elastic portions (25) fit over the first conical portion (23); The second support member (3) has a second cone (33) which is inserted into the second side portion (12); The second cone (33) has a second annular portion on its surface, and a set of pre-tightening elastic portions (25) are also embedded in the second annular portion, and the pre-tightening elastic portions (25) cover the second cone (33).

10. A method of using a tail hook structure for a bicycle frame, characterized in that: Includes the following steps: S1: Determine the tail hook accessories based on the usage scenario; S2: Applied to high-intensity scenarios such as professional mountain bike off-roading, replace the first support piece (2) and the second support piece (3); S3: Insert the first connecting part (21) of the first support member (2) into the first side part (11), and use the first locking member (6) to lock the first support member (2); S4: Insert the second connecting part (31) of the second support member (3) into the second side part (12), and use the second locking member (7) to lock the second support member (3); S5: Apply lubricant to the part of the spool (100) that passes through the first support (2), the second support (3) and the hub. Take the spool (100) from the shaft (10). The spool (100) passes through the first support (2), the hub and the second support (3) in sequence, and then locks it with the locking member (13) to complete the assembly. S6: When used for urban commuting and entry-level road bikes, replace with the third support (4) and the fourth support (5); S7: Insert the third connecting part (41) of the third support member (4) into the first side part (11) and use the first locking member (6) to lock the third support member (4); S8: Insert the second connecting part (31) of the fourth support member (5) into the second side part (12), and use the second locking member (7) to lock the fourth support member (5); S9: Apply lubricant to the part where the straight shaft (101) passes through the third support (4), the hub and the fourth support (5) in advance. Take the straight shaft (101) in the shaft (10), pass the straight shaft (101) through the third support (4), the hub and the fourth support (5) in sequence, and then lock it through the locking part (13) to complete the assembly.

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