A bicycle trailer hitching clip

Abstract

The utility model belongs to the trailer technology field of bicycle, especially a bicycle trailer connecting type buckle, including trailer connecting seat, the both ends of U type of trailer connecting seat are provided with connecting mechanism, the connecting mechanism realizes trailer connecting seat and bicycle quick -witted connection installation's action. This bicycle trailer connecting type buckle, the trailer connecting seat of this device is through U type structure and limit sleeve shaft quick sleeve joint bicycle rear wheel axle, and the combination hoop mechanism and locking screw realizes the change from "hangs the connection" to "locks dead", forms rigid and reliable connection, effectively avoids the accidental drop of trailer in the driving. The design of rotating mechanism cooperation ball head plunger and arc -shaped groove can be free to tilt when guaranteeing bicycle overbend, provides clear rotation limit and straight -line travel positioning feeling for trailer, eliminates the control risk and swing brought by rigid traction, improves the smooth and stable feeling of riding, makes trailer follow naturally like the extension of the car body.

Description

Technical Field

[0001] This utility model relates to the field of bicycle trailer technology, and in particular to a bicycle trailer connecting buckle. Background Technology

[0002] Currently, common bicycle trailer coupling devices on the market generally suffer from the following problems: First, the installation process is cumbersome, usually requiring tools for fixing, and quick disassembly and assembly are not possible, causing inconvenience to users in daily use; second, traditional coupling structures mostly use rigid traction methods, and when the bicycle turns or tilts, the trailer cannot adaptively adjust its posture, which can easily lead to unstable driving, swaying, or even tipping over, posing safety hazards; third, existing trailer frames are mostly made of metal materials or a metal and carbon fiber hybrid structure, which is relatively heavy, increasing the riding load, and the structure is fixed and non-adjustable, making it impossible to flexibly adjust the size of the load-bearing platform according to the load requirements, making storage and transportation inconvenient; therefore, a bicycle trailer coupling buckle is needed. Utility Model Content

[0003] Based on existing technical problems, this utility model proposes a bicycle trailer connecting buckle.

[0004] The present invention proposes a bicycle trailer connection buckle, including a trailer connection seat, wherein the two ends of the trailer connection seat are provided with connection mechanisms, and the connection mechanisms realize the action of quickly connecting and installing the trailer connection seat with the bicycle. A rotating mechanism is provided at the bottom of the U-shaped middle part of the trailer connector, and a trailer support component is provided on one side of the bottom of the trailer connector. The rotating mechanism enables the trailer connector and the trailer support component to be rotated and adjusted after installation. The trailer support assembly is made of carbon fiber through a mold. The trailer support assembly includes multiple arc-shaped rods, and the end faces of the multiple arc-shaped rods are snapped together in pairs. The opposing surfaces of the two arc-shaped rods near the right end are each snapped with a rotating wheel.

[0005] Preferably, the end faces of the plurality of arc-shaped rods are respectively provided with a female buckle and a female buckle. The boss of the female buckle is inserted into the inner wall of the groove of the female buckle, and the female buckle is threadedly locked and installed by a rotating screw fitted onto the female buckle and the threaded groove of the female buckle.

[0006] Preferably, the connecting mechanism includes a retainer that is snapped onto the U-shaped end face of the trailer connector, the surface of the retainer having a sliding clamping groove, the inner wall of the sliding clamping groove being slidably inserted with a limiting sleeve shaft, and the inner walls of the opposing sleeve holes of the two limiting sleeve shafts being movably sleeved with the two ends of the axle of the bicycle rear wheel.

[0007] Preferably, the arc end face of the card holder is provided with a locking hinge groove, the inner side wall of the locking hinge groove is rotatably connected to an auxiliary rotating shaft through a bearing, the arc surface of the auxiliary rotating shaft is rotatably connected to a clamp, and the arc surface of the auxiliary rotating shaft is also movably sleeved with a locking screw, the locking screw passes through the inner wall of the sliding clamping groove and is threadedly connected to the inner wall of the right end of the card holder.

[0008] Preferably, the rotating mechanism includes a rotating shaft that is snapped onto the inner wall of the bottom of the U-shaped center of the trailer connecting seat, and a rotating base that is snapped onto the inner wall of the top of the arc-shaped rod corresponding to the bottom of the trailer connecting seat. A rotating ring is rotatably connected to the top of the rotating base, and the inner wall of the rotating ring is rotatably connected to the arc surface of the rotating shaft.

[0009] Preferably, locking adjustment holes are provided at both ends of the arc-shaped surface of the arc-shaped rod corresponding to the bottom of the trailer connecting seat and the arc-shaped surface of the rotating base. The inner walls of the two locking adjustment holes are threaded with ball-head plungers, and the ball-head arc surface of the ball-head plunger slides and limits the movement with the inner wall of the outer arc groove of the rotating ring.

[0010] Preferably, the bottom surface of the arc-shaped rod corresponding to the bottom of the trailer connecting seat is provided with a mounting sleeve hole, the bottom end of the rotating shaft is located inside the mounting sleeve hole, and a locking screw sleeve is fitted into the inner wall of the mounting sleeve hole, and the inner wall of the locking screw sleeve is threadedly connected to the bottom arc surface of the rotating shaft.

[0011] The beneficial effects of this utility model are as follows: The trailer connector of this device uses a U-shaped structure and a limiting sleeve to quickly engage with the bicycle's rear axle. Combined with a clamping mechanism and locking screw, it transitions from "hook-on" to "locked-in," creating a rigid and reliable connection that effectively prevents the trailer from accidentally detaching during travel. The rotating mechanism, with its ball-end plunger and arc-groove design, allows the bicycle to tilt freely when cornering while providing the trailer with clear rotational limits and a sense of positioning for straight-line travel. This eliminates the handling risks and swaying associated with rigid traction, while enhancing the smoothness and stability of the ride, allowing the trailer to follow naturally as if it were an extension of the bicycle.

[0012] The trailer support components are made entirely of carbon fiber and molded in one piece, ensuring high strength while achieving extreme lightweight, effectively reducing riding load. The modularly designed curved rods are connected and locked with screws via a "female and female buckle" interlocking mechanism, eliminating the need for gluing. Users can freely combine the platform size and shape according to their loading needs, achieving multi-purpose functionality. This purely mechanical connection method not only simplifies maintenance and replacement but also solves the pain points of inconvenient storage and transportation of traditional trailers, allowing for easy storage after disassembly.

[0013] The locking nut design allows for complete disassembly and assembly of the rotating mechanism, facilitating routine maintenance and component replacement. The connection mechanism adapts to various bicycle rear axle sizes, ensuring broad compatibility regardless of frame type. The overall design balances user-friendliness and durability, guaranteeing long-term reliability while comprehensively covering a wide range of applications from everyday cargo transport to outdoor recreation, redefining the portability and functionality standards of bicycle trailers. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a bicycle trailer connecting buckle. Figure 2 A perspective view of a trailer support component for a bicycle trailer connecting buckle; Figure 3 A three-dimensional diagram of the wheel structure of a bicycle trailer connecting buckle; Figure 4 A perspective view of a connecting mechanism for a bicycle trailer connecting buckle; Figure 5 A sectional perspective view of a trailer connector structure for a bicycle trailer connecting buckle; Figure 6 A type of bicycle trailer connecting buckle Figure 4 Enlarged view of the structure at point A in the middle; Figure 7 A type of bicycle trailer connecting buckle Figure 5 Enlarged view of the structure at point B in the middle.

[0015] In the diagram: 1. Trailer connector; 2. Connecting mechanism; 21. Card holder; 22. Sliding clamping groove; 23. Limiting sleeve shaft; 24. Locking hinge groove; 25. Auxiliary rotating shaft; 26. Clamp; 27. Locking screw; 3. Rotating mechanism; 31. Rotating shaft; 32. Rotating base; 33. Rotating ring; 34. Locking adjustment hole; 35. Ball plunger; 36. Mounting sleeve hole; 37. Locking screw sleeve; 4. Trailer support assembly; 41. Arc-shaped rod; 42. Female buckle; 43. Female buckle; 5. Wheel. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figures 1-7A bicycle trailer connection buckle includes a trailer connector 1, with connecting mechanisms 2 at both ends of the U-shaped trailer connector 1. The connecting mechanisms 2 enable quick connection and installation between the trailer connector 1 and the bicycle. The connecting mechanism 2 includes a locking seat 21 that is snapped onto the U-shaped end face of the trailer connector 1. The surface of the locking seat 21 is provided with a sliding clamping groove 22. The inner wall of the sliding clamping groove 22 is slidably inserted with a limiting sleeve shaft 23. The inner walls of the opposing sleeve holes of the two limiting sleeve shafts 23 are respectively movably sleeved with the two ends of the axle of the bicycle's rear wheel.

[0018] In this specific implementation, the user simply aligns the U-shaped opening of the trailer connector 1 with the bicycle's rear wheel axle, pushes or snaps the limiting sleeve 23 into both ends of the axle, and the main body connection is completed. The entire process requires no tools and takes only a few seconds, truly achieving "one-second quick disassembly / assembly".

[0019] The arc end face of the card holder 21 is provided with a locking hinge groove 24. The inner side wall of the locking hinge groove 24 is rotatably connected to an auxiliary rotating shaft 25 through a bearing. The arc surface of the auxiliary rotating shaft 25 is rotatably connected to a clamp 26. The arc surface of the auxiliary rotating shaft 25 is also movably sleeved with a locking screw 27. The locking screw 27 passes through the inner wall of the sliding clamping groove 22 and is threadedly connected to the inner wall of the right end of the card holder 21.

[0020] Specifically, during installation, the user can first place the U-shaped seat and the limiting sleeve 23 onto the bicycle wheel 5 axle. At this time, the clamp 26 mechanism is in a loose state, facilitating quick alignment and initial installation. By rotating the locking screw 27, the entire clamp 26 mechanism can be driven to tighten towards the wheel axle, thereby generating a huge clamping force. This changes the "hook-on" relationship between the chuck 21 and the bicycle rear axle to a "locked-in" relationship. The clamp 26 can rotate slightly around the auxiliary pivot 25, allowing it to better fit bicycle rear forks or axle seats of different thicknesses or angles, ensuring uniform contact of the clamping surfaces rather than point contact, thereby increasing friction and protecting the paint.

[0021] A rotating mechanism 3 is provided at the bottom of the U-shaped middle part of the trailer connector 1, and a trailer support component 4 is provided on one side of the bottom of the trailer connector 1. The rotating mechanism 3 enables the trailer connector 1 and the trailer support component 4 to rotate and adjust after installation. The rotating mechanism 3 includes a rotating shaft 31 that is snapped onto the inner wall of the bottom of the U-shaped middle part of the trailer connector 1. A rotating base 32 is snapped onto the inner wall of the top of the arc-shaped rod 41 corresponding to the bottom of the trailer connector 1. A rotating ring 33 is rotatably connected to the top of the rotating base 32. The inner wall of the rotating ring 33 is rotatably connected to the arc surface of the rotating shaft 31.

[0022] Specifically, this is achieved through a 33-turn mechanism. When the bicycle leans, the trailer can maintain its relative level by using this turning point, allowing it to continue traveling in a straight line or turn with a smaller radius. This perfectly decouples the bicycle's leaning from the trailer's stability, making the riding experience almost identical to when not towing a trailer.

[0023] Locking adjustment holes 34 are provided at both ends of the arc-shaped surface of the arc-shaped rod 41 corresponding to the bottom of the trailer connecting seat 1 and the arc-shaped surface of the rotating base 32. The inner walls of the two locking adjustment holes 34 are threaded with ball plungers 35. The ball-head arc surface of the ball plunger 35 slides and limits the movement with the inner wall of the outer arc groove of the rotating ring 33.

[0024] Specifically, the ball plunger 35 slides at both ends of the arc-shaped groove, with the end of the groove being the mechanical stop. This range is precisely calculated to ensure that the bicycle has sufficient freedom of movement during normal turning and leaning, while also ensuring that no mechanical interference occurs under any extreme conditions. It defines a clear physical boundary for safe rotation.

[0025] The bottom surface of the arc-shaped rod 41 corresponding to the bottom of the trailer connector 1 is provided with a mounting sleeve hole 36. The bottom end of the rotating shaft 31 is located inside the mounting sleeve hole 36, and a locking nut 37 is fitted into the inner wall of the mounting sleeve hole 36. The inner wall of the locking nut 37 is threadedly connected to the arc surface of the bottom end of the rotating shaft 31.

[0026] Specifically, when the rotating shaft 31 is subjected to the up-and-down bumping force and traction force of the trailer, it tends to come off axially. The locking nut 37, through its threaded connection with the bottom end of the rotating shaft 31, firmly "locks" the rotating shaft 31 from the bottom, ensuring that it will not come loose upward from the bearing or sleeve of the rotating base 32. This is the most basic safety guarantee. When it is necessary to clean, lubricate, or replace the bearing / sleeve inside the rotating mechanism 3, simply unscrew the locking nut 37 from the bottom to remove the entire steering assembly from the trailer boom, making it extremely easy to maintain.

[0027] The trailer support assembly 4 is made of carbon fiber through a mold. The trailer support assembly 4 includes multiple arc-shaped rods 41, and the end faces of the multiple arc-shaped rods 41 are snapped together in pairs. The opposing surfaces of the two arc-shaped rods 41 near the right end are snapped together with rotating wheels 5. The end faces of the multiple arc-shaped rods 41 are respectively provided with female buckles 42 and female buckles 43. The boss of the female buckle 42 is inserted into the inner wall of the groove of the female buckle 43, and the female buckle 43 is threaded and locked to the threaded groove of the female buckle 42 by a rotating screw fitted into the female buckle 43. The multiple arc-shaped rods 41 can be freely assembled according to the support requirements of the trailer.

[0028] Specifically, carbon fiber is renowned for its extremely high specific strength and specific modulus. The all-carbon fiber trailer frame is significantly lighter than the traditional "aluminum + carbon fiber" hybrid structure; the carbon fiber frame possesses excellent fatigue resistance, unlike metals which suffer from fatigue due to repeated stress. Modular connections avoid the delamination and aging problems that may occur with adhesive layers over long-term use; traditional adhesive processes have high environmental and process requirements and carry the risk of aging. This design employs a "female snap-fit ​​42 + female snap-fit ​​43" interlocking connection, secured directly by screws using a purely mechanical method. The strength of the mechanical connection is predictable and controllable, avoiding potential problems caused by glue quality or improper construction; by "freely assembling" different numbers and specifications of curved rods 41, the size and shape of the trailer's load-bearing platform can be quickly changed.

[0029] The trailer connector 1 of this device quickly engages with the bicycle's rear wheel axle via a U-shaped structure and a limiting sleeve 23. Combined with the clamp 26 mechanism and locking screw 27, it transitions from "hook-on" to "locked-in," forming a rigid and reliable connection that effectively prevents the trailer from accidentally detaching during travel. The rotating mechanism 3, with its ball-end plunger 35 and arc-shaped groove design, ensures the bicycle can tilt freely when cornering while providing the trailer with clear rotational limits and a sense of positioning for straight-line travel. This eliminates the handling risks and swaying associated with rigid traction, while enhancing the smoothness and stability of the ride, allowing the trailer to follow naturally as if it were an extension of the bicycle.

[0030] The trailer support component 4 is made entirely of carbon fiber and molded in one piece, achieving extreme lightweight while ensuring high strength, effectively reducing riding load. The modularly designed arc-shaped rod 41 is connected and locked with screws via a "female buckle 42 + female buckle 43" connection, eliminating the need for gluing. Users can freely combine the platform size and shape according to their loading needs, achieving multiple uses for one vehicle. This purely mechanical connection method not only simplifies maintenance and replacement but also solves the pain points of inconvenient storage and transportation of traditional trailers, and can be easily stored after disassembly.

[0031] The locking nut 37 design allows the rotating mechanism 3 to be disassembled as a whole, facilitating routine maintenance and component replacement. The connecting mechanism 2 adapts to various bicycle rear axle specifications, is frame-independent, and achieves broad compatibility. The overall design balances user-friendliness and durability, ensuring long-term reliability while comprehensively covering a variety of application scenarios from daily cargo transport to outdoor recreation, redefining the portability and functionality standards of bicycle trailers.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bicycle trailer connecting buckle, comprising a trailer connecting seat (1), characterized in that: The trailer connector (1) has connecting mechanisms (2) at both ends of its U-shape. The connecting mechanisms (2) enable the trailer connector (1) to be quickly connected and installed with the bicycle. A rotating mechanism (3) is provided at the bottom of the U-shaped middle part of the trailer connector (1), and a trailer support assembly (4) is provided on one side of the bottom of the trailer connector (1). The rotating mechanism (3) enables the trailer connector (1) and the trailer support assembly (4) to rotate and adjust after installation. The trailer support assembly (4) is made of carbon fiber material through a mold. The trailer support assembly (4) includes multiple arc-shaped rods (41), and the end faces of the multiple arc-shaped rods (41) are snapped together in pairs. The two arc-shaped rods (41) near the right end of the tail are both snapped together with rotating wheels (5).

2. The bicycle trailer connecting buckle according to claim 1, characterized in that: The end faces of the multiple arc-shaped rods (41) are respectively provided with a female buckle (42) and a female buckle (43). The boss of the female buckle (42) is inserted into the inner wall of the groove of the female buckle (43), and the female buckle (42) is threadedly locked and installed by a rotating screw fitted on the female buckle (43) and threaded through the threaded groove of the female buckle (42).

3. The bicycle trailer connecting buckle according to claim 1, characterized in that: The connecting mechanism (2) includes a card seat (21) that is snapped onto the U-shaped end face of the trailer connecting seat (1). The surface of the card seat (21) is provided with a sliding clamping groove (22). The inner wall of the sliding clamping groove (22) is slidably inserted with a limiting sleeve shaft (23). The inner walls of the opposing sleeve holes of the two limiting sleeve shafts (23) are respectively movably sleeved with the two ends of the axle of the bicycle rear wheel.

4. The bicycle trailer connecting buckle according to claim 3, characterized in that: The arc end face of the card holder (21) is provided with a locking hinge groove (24). The inner side wall of the locking hinge groove (24) is rotatably connected to an auxiliary rotating shaft (25) through a bearing. The arc surface of the auxiliary rotating shaft (25) is rotatably connected to a clamp (26). The arc surface of the auxiliary rotating shaft (25) is also movably sleeved with a locking screw (27). The locking screw (27) passes through the inner wall of the sliding clamping groove (22) and is threadedly connected to the inner wall of the right end of the card holder (21).

5. A bicycle trailer connecting buckle according to claim 1, characterized in that: The rotating mechanism (3) includes a rotating shaft (31) that is snapped onto the inner wall of the bottom of the U-shaped middle part of the trailer connecting seat (1). A rotating base (32) is snapped onto the inner wall of the top of the arc-shaped rod (41) corresponding to the bottom of the trailer connecting seat (1). A rotating ring (33) is rotatably connected to the top of the rotating base (32). The inner wall of the rotating ring (33) is rotatably connected to the arc surface of the rotating shaft (31).

6. A bicycle trailer connecting buckle according to claim 5, characterized in that: Locking adjustment holes (34) are provided at both ends of the arc-shaped surface of the arc-shaped rod (41) corresponding to the bottom of the trailer connecting seat (1) and the arc-shaped surface of the rotating base (32). The inner walls of the two locking adjustment holes (34) are threaded with ball plungers (35). The ball-head arc surface of the ball plunger (35) slides and limits the inner wall of the outer arc groove of the rotating ring (33).

7. A bicycle trailer connecting buckle according to claim 5, characterized in that: The bottom surface of the arc-shaped rod (41) corresponding to the bottom of the trailer connecting seat (1) is provided with a mounting sleeve hole (36). The bottom end of the rotating shaft (31) is located inside the mounting sleeve hole (36), and a locking nut (37) is fitted into the inner wall of the mounting sleeve hole (36). The inner wall of the locking nut (37) is threadedly connected to the bottom arc surface of the rotating shaft (31).

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