Folding bicycle and head folding device thereof

Abstract

The utility model relates to a folding bicycle and its head folding device, is equipped with the front fork mounting hole in the front end of main part structure, and the front fork of bicycle and the head are installed in the front fork mounting hole, the rear end of main part structure is connected with crossbeam through hinged shaft, realizes the folding and unfolding of head, is equipped with locking handle on the side of crossbeam away from hinged shaft, is equipped with locking assembly on locking handle, is equipped with the lock groove on main part structure, is equipped with the locking piece that cooperates with locking assembly in lock groove, realizes the quick locking and stable connection of main part structure and crossbeam through the joint of locking assembly and locking piece, is equipped with the linkage shaft and eccentric wheel fixed block still on locking handle, and the linkage shaft connects locking handle and main part structure respectively, when folding, the linkage shaft drives locking handle to rotate, makes eccentric wheel fixed block connect with the hinged lug on crossbeam, thereby realizes automatic locking after folding, improves folding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and in particular to a folding bicycle and its handlebar folding device. Background Technology

[0002] Bicycles are widely used in urban commuting, short trips, and outdoor recreation due to their flexibility and low-carbon advantages. However, the fixed, integrated handlebar structure of traditional bicycles makes them bulky, causing significant inconvenience for carrying and storage. The handlebar assembly of current mainstream bicycles typically consists of the handlebars, the stem, and the connection structure between the stem and the frame, all of which are mostly rigidly fixed. While this design ensures structural stability during riding, it has obvious limitations when not in use:

[0003] For everyday storage, a fixed handlebar prevents the bicycle from being further compressed, making it prone to interfering with other items and taking up too much usable space in spaces such as hallways and small storage rooms in apartments. For portable transport, whether it's placed in a car trunk, used on public transportation (such as subways or buses), or carried by hand for short distances, a fixed handlebar makes it difficult to fit the bicycle's overall length and width into limited spaces, increasing the difficulty of handling and even preventing it from being legally transported due to exceeding size limits.

[0004] To improve portability, some existing bicycles have attempted to design a folding structure in the middle of the frame. However, relying solely on frame folding cannot solve the problem of excessive size. The overall volume after folding is still relatively high, failing to fully meet users' core needs for extreme volume compression and convenient carrying. Utility Model Content

[0005] Therefore, it is necessary to provide a folding bicycle and its handlebar folding device, which can achieve efficient folding of the handlebar and significantly reduce the overall space occupied by the bicycle.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A folding device for a vehicle front end includes: a main structure and a crossbeam; the front end of the main structure is provided with a fork mounting hole, and one side of the rear end face of the main structure and one side of the front end face of the crossbeam are both provided with hinge ears, which are connected by a hinge shaft; the other side of the rear end face of the main structure is provided with a contour groove, and a locking component is provided in the contour groove; a locking handle is provided on the side wall of the crossbeam on the same side as the contour groove, an eccentric wheel fixing block is provided on the inner side wall of the locking handle, and a locking component is provided at the end of the locking handle away from the crossbeam, which is engaged with the locking component; a linkage shaft is also provided in the contour groove, one end of the linkage shaft is rotatably connected to the locking handle through a rotating shaft, and the other end is rotatably connected to the main structure; the linkage shaft pulls the locking handle to rotate, so that the eccentric wheel fixing block is connected to the hinge ear on the crossbeam.

[0007] In one embodiment, the end of the locking handle has anti-slip stripes on the side near the main structure.

[0008] In one embodiment, the locking handle has a through hole at the end away from the crossbeam, and the locking member includes a pusher, a return spring, and a locking hook. The pusher is disposed in the through hole, one end of the return spring is fixedly connected to the pusher, and the other end is fixedly connected to the through hole. The locking hook is rotatably disposed on the locking handle, and one end of the locking hook is rotatably connected to the end of the pusher.

[0009] In one embodiment, the locking element is a fastening protrusion disposed on the main structure, and the end of the fastening protrusion away from the main structure is provided with a fixed skirt that engages with the locking hook.

[0010] In one embodiment, the front end face of the crossbeam is provided with a connecting hole, and the rear end face of the main structure is provided with a connecting protrusion, the connecting protrusion matching the connecting hole.

[0011] In one embodiment, the linkage shaft includes a connecting block, a sleeve, and a fastening screw connected in sequence; the connecting block is rotatably connected to the main structure; and the sleeve is fixedly connected to the rotating shaft.

[0012] In one embodiment, the connecting block is provided with a first threaded hole, and the two ends of the sleeve are respectively provided with external threads and a second threaded hole. The external threads are connected to the first threaded hole, and the fastening screw passes through the rotating shaft and is connected to the second threaded hole.

[0013] This utility model also provides a folding bicycle, including the folding headrest device described in any of the above embodiments.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a bicycle head folding device with a fork mounting hole at the front end of the main structure, where the bicycle's fork and head are mounted. The rear end of the main structure is connected to the crossbeam via a hinge shaft, enabling the folding and unfolding of the head. A locking handle is located on the side of the crossbeam away from the hinge shaft, with a locking component on the handle. The main structure has a contour groove, within which a locking element mates with the locking component. Through the engaging engagement of the locking component and the locking element, the main structure and the crossbeam are quickly locked and stably connected. The locking handle also has a linkage shaft and an eccentric wheel fixing block. The linkage shaft connects the locking handle to the main structure. When the main structure is folded, the linkage shaft drives the locking handle to rotate, causing the eccentric wheel fixing block to connect with the hinge lug on the crossbeam, thus achieving automatic locking after folding and improving folding efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a vehicle front folding device according to one embodiment;

[0017] Figure 2 An exploded view of a vehicle front folding device according to one embodiment;

[0018] Figure 3 This is a cross-sectional structural schematic diagram of a vehicle front folding device according to one embodiment.

[0019] In the attached diagram, 10 is the front folding device; 100 is the main structure; 110 is the front fork mounting hole; 120 is the contour groove; 130 is the locking element; 140 is the connecting protrusion; 200 is the crossbeam; 210 is the locking handle; 220 is the eccentric wheel fixing block; 230 is the connecting hole; 300 is the locking assembly; 310 is the push-button element; 320 is the return spring; 330 is the locking hook; 400 is the linkage shaft; 410 is the connecting block; 420 is the sleeve; and 430 is the fastening screw. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0021] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0022] In one embodiment, such as Figure 1 and Figure 2As shown, a folding device 10 for a bicycle front end includes a main structure 100 and a crossbeam 200. A vertical fork mounting hole 110 is provided at the front end of the main structure 100 for mounting a fork and a front end assembly. Corresponding hinge ears are provided on the same side of the rear end face of the main structure 100 and the front end face of the crossbeam, and the two hinge ears are connected by a hinge shaft, allowing the main structure 100 to rotate along the hinge shaft. A contour groove 120 is provided on the side wall of the main structure 100 away from the hinge shaft, for contouring... A locking element 130 is provided in the groove 120; a locking handle 210 is rotatably connected to the side wall of the crossbeam 200 away from the hinge axis. The locking handle 210 corresponds to the shape of the contour groove 120, so that the locking handle 210 can be embedded in the contour groove 120 to improve aesthetics; a locking component 300 is provided at the end of the locking handle 210 away from the crossbeam 200. The locking component 300 engages with the locking element 130 to realize quick locking and unlocking of the main structure 100 and the crossbeam 200. A linkage shaft 400 is also provided in the contour groove 120. The two ends of the linkage shaft 400 are rotatably connected to the locking handle 210 and the main structure 100, respectively. When the main structure 100 and the crossbeam 200 are folded, the linkage shaft 400 moves under the drive of the main structure 100. At the same time, the linkage shaft 400 drives the locking handle 210 to rotate around the connection point between the locking handle 210 and the crossbeam 200, so that the eccentric wheel fixing block 220 set on the side wall of the locking handle 210 near the main structure 100 abuts against the hinge ear on the crossbeam 200, thereby realizing automatic locking.

[0023] To facilitate the operation of the locking handle 210 when folding the front of the vehicle, anti-slip stripes are provided on the inner side of the end of the locking handle 210 away from the crossbeam 200 to enhance friction and facilitate user operation. In scenarios involving frequent folding and unfolding, this effectively prevents slippage and improves operational safety and convenience.

[0024] Further, the locking assembly 300 includes a pusher 310, a return spring 320, and a locking hook 330. The locking handle 210 has a through hole at one end away from the crossbeam 200. The pusher 310 is installed in the through hole, and one end of it extends into the inside of the locking handle 210 and is rotatably connected to one end of the locking hook 330. The middle part of the locking hook 330 is rotatably connected to a limiting post on the locking handle 210. The return spring 320 is sleeved on the pusher 310. On the 10, one end is fixed to the inner wall of the through hole, and the other end abuts against the pusher 310 to provide elastic restoring force; when the pusher 310 is pressed, the locking hook 330 rotates around the limiting post, so that the other end of the locking hook 330 disengages from the locking member 130, thereby unlocking; the end of the locking hook 330 is provided with a bevel structure. When it is necessary to fix the locking hook 330 and the locking member 130, the bevel structure can guide the locking hook 330 to smoothly engage in the locking member 130, thereby achieving quick locking.

[0025] Furthermore, the locking member 130 includes a fastening protrusion fixed inside the contour groove 120, and a fixing skirt is provided around the outer periphery of the fastening protrusion. The fixing skirt engages with the locking hook 330 to achieve stable locking, prevent accidental loosening due to vibration or external force, and improve structural stability and safety of use. The inner wall of the fixing skirt is provided with anti-slip teeth, which tightly engage with the surface of the locking hook 330 to further enhance locking reliability.

[0026] To improve the stability of the connection between the main structure 100 and the crossbeam 200, connecting protrusions 140 and connecting holes 230 are respectively provided on two opposing planes of the main structure 100 and the crossbeam 200. The connecting protrusions 140 are provided on the main structure 100, and the connecting holes 230 are provided on the crossbeam 200. The two are positioned correspondingly. When the main structure 100 and the crossbeam 200 are connected, the connecting protrusions 140 are inserted into the connecting holes 230 to form a positioning fit, effectively limiting the relative displacement between the two. In this embodiment, there are two connecting protrusions 140 and two connecting holes 230, respectively provided at the upper and lower ends of their respective planes. A clearance space is provided between the two connecting protrusions 140 for the linkage shaft 400 to pass through, so that the structural movement is smooth and interference-free during the folding process.

[0027] To facilitate adjustment of the length of the linkage shaft 400, the linkage shaft 400 is an adjustable structure composed of a connecting block 410, a sleeve 420, and a fastening screw 430. The first end of the connecting block 410 is rotatably connected to the main structure 100, and the second end has a first threaded hole. One end of the sleeve 420 has an external thread, and the other end has a second threaded hole. The external thread connects to the first threaded hole on the connecting block, and the fastening screw 430 passes through a hole in the middle of the rotating shaft and connects to the second threaded hole, thus fixing the linkage shaft 400 to the rotating shaft. When the length of the linkage shaft 400 needs to be adjusted, the insertion depth of the sleeve 420 into the first threaded hole is changed by rotating the sleeve 420, thereby adjusting the overall length. This allows for precise adaptation to different assembly requirements, ensuring smooth transmission and no loosening during folding and unfolding; improving structural flexibility and facilitating installation and maintenance.

[0028] The general working process of this utility model is as follows: When it is necessary to lock the main structure 100 and the crossbeam 200, align and press the connecting hole 230 and the connecting protrusion 140, press the locking handle 210, and the locking hook 330 slides into the fixed skirt under the guidance of its inclined end, realizing quick locking; when it is necessary to fold, press the actuating member 310 to make the locking hook 330 rotate around the limiting post, and its end disengages from the fixed skirt, releasing the constraint on the locking member 130. At this time, the main structure 100 and the crossbeam 200 can be rotated relative to each other to realize the folding operation; when the main structure 100 rotates, the linkage shaft 400 rotates accordingly, and the linkage shaft 400 drives the locking handle 210 to rotate around the connecting shaft between the locking handle 210 and the crossbeam 200, thereby engaging the eccentric wheel fixing block on the locking handle 210 with the hinge ear on the crossbeam 200 to realize the self-locking state after folding, preventing accidental unfolding during transportation or use, and improving safety and ease of use.

[0029] This utility model also provides a folding bicycle, including the folding device 10 described in any of the above embodiments. The folding bicycle's front end and front fork assembly are installed in the front fork mounting hole 110 at the front end of the main structure 100, and a foldable rear fork assembly is provided at the rear end of the crossbeam 200. The overall multi-folding structure of the folding bicycle can achieve rapid folding and unfolding, greatly improving portability and space utilization. In the riding state, all connecting parts fit tightly together, the structure is stable and reliable, and there is no loosening or abnormal noise. After folding, the size is compact, making it easy to put into the trunk of a car or store indoors.

[0030] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A folding device for the front of a vehicle, characterized in that, include: The main structure and crossbeam are as follows: The front end of the main structure has a fork mounting hole; one side of the rear end face of the main structure and one side of the front end face of the crossbeam both have hinge ears connected by a hinge shaft; the other side of the rear end face of the main structure has a contour groove containing a locking element; a locking handle is located on the side wall of the crossbeam on the same side as the contour groove; an eccentric wheel fixing block is located on the inner side wall of the locking handle; a locking assembly is located at the end of the locking handle away from the crossbeam, and the locking assembly engages with the locking element; a linkage shaft is also located within the contour groove; one end of the linkage shaft is rotatably connected to the locking handle via a rotating shaft, and the other end is rotatably connected to the main structure; the linkage shaft pulls the locking handle to rotate, causing the eccentric wheel fixing block to connect with the hinge ear on the crossbeam.

2. The folding device for the front of the vehicle according to claim 1, characterized in that, The locking handle end has anti-slip stripes on the side near the main structure.

3. The folding device for the front of the vehicle according to claim 1, characterized in that, The locking handle has a through hole at one end away from the crossbeam. The locking component includes a pusher, a return spring, and a locking hook. The pusher is disposed in the through hole. One end of the return spring is fixedly connected to the pusher, and the other end is fixedly connected to the through hole. The locking hook is rotatably disposed on the locking handle, and one end of the locking hook is rotatably connected to the end of the pusher.

4. The folding device for the front of the vehicle according to claim 3, characterized in that, The locking component is a fastening protrusion provided on the main structure, and the end of the fastening protrusion away from the main structure is provided with a fixed skirt that engages with the locking hook.

5. The folding device for the front of the vehicle according to claim 1, characterized in that, The front end face of the crossbeam is provided with a connecting hole, and the rear end face of the main structure is provided with a connecting protrusion, which matches the connecting hole.

6. The folding device for the front of the vehicle according to claim 1, characterized in that, The linkage shaft includes a connecting block, a sleeve, and a fastening screw connected in sequence; the connecting block is rotatably connected to the main structure; and the sleeve is fixedly connected to the rotating shaft.

7. The folding device for the front of the vehicle according to claim 6, characterized in that, The connecting block is provided with a first threaded hole, and the two ends of the sleeve are respectively provided with external threads and a second threaded hole. The external thread is connected to the first threaded hole, and the fastening screw passes through the rotating shaft and is connected to the second threaded hole.

8. A folding bicycle, characterized in that, Includes the front folding device as described in any one of claims 1-7.

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