Electric bicycle frame with quick release mechanism
By using a sliding sleeve limiting design for the rotating front and rear beams, combined with a lever and auxiliary frame, the problem of balancing the stability and disassembly difficulty of the electric bicycle crossbeam during folding is solved, achieving a balance between convenient disassembly and assembly and stability.
Patent Information
- Application Number
- CN202422138720.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The quick-release connection mechanism of the existing electric bicycle crossbeam is difficult to balance stability and disassembly difficulty during the folding process, resulting in reduced structural stability or complicated disassembly and assembly.
The design features rotatable front and rear beams, combined with sliding sleeves and elastic connections. Limiting is achieved by sliding sleeves on the outside of the front and rear beams and pushing them. With the help of levers and auxiliary frames, the front and rear beams can be easily disassembled and folded, ensuring that the structural stability is not reduced.
It enables a smooth transition between the electric bicycle's use state and folded state, maintaining structural stability while simplifying disassembly and assembly, thus improving portability and ease of use.
Smart Images
Figure CN223533618U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric bicycle frame technology, and in particular to an electric bicycle frame with a quick-release mechanism. Background Technology
[0002] With the continuous development of new energy technologies and the expansion of related markets, the means of transportation using electric energy are becoming increasingly diverse. Among them, electric bicycles have the advantages of low cost, wide applicability, low space requirements, and ease of use. Therefore, electric bicycles have gradually become one of the main means of transportation in cities. Due to the compact urban space and the inability of parking area planning to meet daily parking needs, more and more users choose to park their electric bicycles directly indoors. In order to facilitate carrying the bicycle upstairs or pushing it into the elevator, various types of folding electric bicycles have emerged on the market.
[0003] Folding crossbeams are a common folding method used in existing folding electric bicycles. However, to achieve the folding effect, existing electric bicycle crossbeams often incorporate quick-release connecting mechanisms within the crossbeam itself. This requires slotting and drilling within the crossbeam to accommodate the connecting mechanism. Compared to a one-piece crossbeam structure, this type of crossbeam exhibits reduced stability and support. Furthermore, using a crossbeam-to-beam connection method with externally added detachable limiting mechanisms to improve stability increases the difficulty of assembly and disassembly. To address these issues, an electric bicycle frame with a quick-release mechanism can be proposed, ensuring the stability of the frame's crossbeams while providing an easy-to-operate method for assembling and disassembling them. Utility Model Content
[0004] The purpose of this invention is to provide an electric bicycle frame with a quick-release mechanism, which ensures the stability of the frame crossbeam while providing an easy way to assemble and disassemble the crossbeam.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] An electric bicycle frame with a quick-release mechanism includes a front beam, a front wheel frame rotatably connected to one side of the front beam and a matching rear beam provided on the other side, the front beam and the rear beam are connected by a disassembly assembly, a support seat is fixedly connected to the side of the rear beam away from the front beam, and a rear wheel frame is fixedly connected to the outer side of the support seat.
[0007] The assembly and disassembly components include a connecting frame and a sliding sleeve. The front beam and the rear beam are rotatably connected by the connecting frame. The side wall of the sliding sleeve has a U-shaped groove that mates with the connecting frame. The sliding sleeve is fitted on the outer side of the mating surface of the front beam and the rear beam. The sliding sleeve is fitted on the outer side of the rear beam and is elastically slidably connected to the rear beam by a spring.
[0008] Preferably, the connecting frame includes a movable frame, which fits against the side wall of the front beam and is fixedly connected to the front beam. A fixed frame that cooperates with the movable frame is fixedly connected to the outer side of the rear beam. A connecting sleeve is provided through the inside of the fixed frame and is rotatably connected to the fixed frame. The movable frame and the connecting sleeve are connected by a pin.
[0009] Preferably, the pin passes through the fixing frame and the connecting sleeve and is connected to both the fixing frame and the connecting sleeve by thread.
[0010] Preferably, the inner side of the sliding sleeve is provided with two levers that are symmetrically distributed vertically. The front beam and the rear beam are both provided with grooves that cooperate with the levers. The levers are located in the grooves in the front beam, and the end of the levers near the rear beam is rotatably connected to the front beam through a torsion spring.
[0011] Preferably, an auxiliary frame is fixedly connected to the outside of the lever, and the auxiliary frame has a T-shaped structure.
[0012] Preferably, the two ends of the spring are welded and fixed to the sliding sleeve and the support seat, respectively.
[0013] This utility model has the following beneficial effects:
[0014] This electric bicycle frame features a front and rear beam that can rotate relative to each other, allowing the front and rear beams to switch between two states: a straight-line distribution and a parallel distribution. This enables the frame to be switched between a used state and a folded state. When the front and rear beams are in a straight-line distribution and the electric bicycle is in the used state, a sliding sleeve can be fitted onto the outside of the mating surfaces of the front and rear beams, effectively limiting their movement. This ensures that the entire structure formed by the front and rear beams, including the connecting sleeve, maintains a stable overall shape. Pushing the sliding sleeve to expose the mating surfaces of the front and rear beams allows the frame to be folded. This method of disassembly and assembly between the front and rear beams is convenient for quick and easy disassembly and assembly without damaging their structure. Furthermore, the sliding sleeve can further reinforce both beams, ensuring that the detachable and foldable functionality does not reduce the stability of the frame structure. This achieves the combined effect of ensuring the stability of the frame crossbeams while providing an easy-to-operate method for disassembling and assembling them. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall appearance of the present utility model;
[0017] Figure 2 This is a schematic diagram illustrating the disassembly and assembly method of this utility model;
[0018] Figure 3 This is a schematic diagram of the folded state of this utility model;
[0019] Figure 4 Schematic diagram of the lever and auxiliary frame working together
[0020] In the diagram: 1. Front beam; 2. Rear beam; 3. Assembly / disassembly assembly; 4. Front wheel frame; 5. Support base; 6. Rear wheel frame; 7. Connecting frame; 8. Movable frame; 9. Fixed frame; 10. Connecting sleeve; 11. Pin; 12. Sliding sleeve; 13. Lever; 14. Groove; 15. Auxiliary frame. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0022] Reference Figure 1-4 An electric bicycle frame with a quick-release mechanism includes a front beam 1, a front wheel frame 4 rotatably connected to one side of the front beam 1 and a matching rear beam 2 provided on the other side, the front beam 1 and the rear beam 2 are connected by a disassembly assembly 3, a support seat 5 is fixedly connected to the side of the rear beam 2 away from the front beam 1, and a rear wheel frame 6 is fixedly connected to the outside of the support seat 5.
[0023] The assembly / disassembly assembly 3 includes a connecting frame 7 and a sliding sleeve 12. The front beam 1 and the rear beam 2 are rotatably connected by the connecting frame 7. The side wall of the sliding sleeve 12 is provided with a U-shaped groove that cooperates with the connecting frame 7. The sliding sleeve 12 is fitted on the outer side of the mating surface of the front beam 1 and the rear beam 2. The sliding sleeve 12 is fitted on the outer side of the rear beam 2 and is elastically slidably connected to the rear beam 2 by a spring.
[0024] This solution includes the following workflow:
[0025] Under normal use, the end faces of the front beam 1 and the rear beam 2 are perfectly aligned, and the front beam 1 and the rear beam 2 are distributed in a straight line. The sliding sleeve 12 is fitted on the outside of the front beam 1 and the rear beam 2, and the end faces of the front beam 1 and the rear beam 2 are located on the inside of the sliding sleeve 12. The sliding sleeve 12 is in a stable state under the limiting of the spring and the two ends of the connecting frame 7. At this time, the sliding sleeve 12 will limit the front beam 1 and the rear beam 2, so the front beam 1 and the rear beam 2 can remain aligned. When the bicycle needs to be folded, simply pull out the sliding sleeve. Pushing the slide sleeve 12 towards the support base 5 will expose the joint between the front beam 1 and the rear beam 2. In this state, push the front beam 1 towards the side where the connecting frame 7 is located, and the front beam 1 can be rotated and folded to be parallel with the rear beam 2. Before use, simply push the slide sleeve 12 to expose the end face of the rear beam 2, then rotate the front beam 1 back to its original position. After releasing the slide sleeve 12, the spring can push the slide sleeve 12 back to its original position, and the slide sleeve 12 can limit the front beam 1 and the rear beam 2 to restore the usable state.
[0026] Based on the above work process, it can be concluded that:
[0027] The front beam 1 and rear beam 2 can be disassembled and assembled by sliding and adjusting the position of the sliding sleeve 12. This disassembly and folding method can avoid the misalignment of the mating end faces of the front beam 1 and rear beam 2 without damaging the integrity of the structure of the front beam 1 and rear beam 2. Thus, the stability of the frame crossbeams is ensured while the disassembly and folding operation is convenient.
[0028] Furthermore, the connecting frame 7 includes a movable frame 8, which fits against the side wall of the front beam 1 and is fixedly connected to the front beam 1. A fixed frame 9 that cooperates with the movable frame 8 is fixedly connected to the outer side of the rear beam 2. A connecting sleeve 10 is provided through the inside of the fixed frame 9 and is rotatably connected to the fixed frame 9. The movable frame 8 and the connecting sleeve 10 are connected by a pin 11. The whole formed by the connection of the front beam 1 and the movable frame 8 can rotate around the central axis of the pin 11.
[0029] Furthermore, the pin 11 passes through the fixing frame 9 and the connecting sleeve 10 and is threadedly connected to both the fixing frame 9 and the connecting sleeve 10. After rotating and removing the pin 11, the front beam 1 and the rear beam 2 can be completely separated, so that the two parts of the frame can be moved and stored separately, further improving portability.
[0030] Furthermore, two levers 13 are symmetrically distributed on the inner side of the sliding sleeve 12. Both the front beam 1 and the rear beam 2 have grooves 14 that cooperate with the levers 13. The levers 13 are located in the grooves 14 in the front beam 1, and the end of the levers 13 near the rear beam 2 is rotatably connected to the front beam 1 through a torsion spring. When the levers 13 are rotated away from the front beam 1, the levers 13 can push the sliding sleeve 12 toward the support seat 5 to expose the joint between the front beam 1 and the rear beam 2. This process uses leverage to reduce the difficulty of moving the sliding sleeve 12, making the operation more convenient and efficient.
[0031] Furthermore, an auxiliary frame 15 is fixedly connected to the outside of the lever 13. The auxiliary frame 15 has a T-shaped structure, and fingers can be inserted under the auxiliary frame 15 to apply force to rotate the lever 13, which facilitates operation.
[0032] Furthermore, the two ends of the spring are welded and fixed to the sliding sleeve 12 and the support seat 5 respectively. After the front beam 1 and the rear beam 2 are completely disassembled, the welding points of the spring can be removed and the spring can be replaced, which can improve the overall durability of the frame.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An electric bicycle frame with a quick-release mechanism, comprising a front beam (1), characterized in that: The front beam (1) is rotatably connected to a front wheel frame (4) on one side and a matching rear beam (2) is provided on the other side. The front beam (1) and the rear beam (2) are connected by a disassembly assembly (3). A support seat (5) is fixedly connected to the side of the rear beam (2) away from the front beam (1). A rear wheel frame (6) is fixedly connected to the outer side of the support seat (5). The assembly / disassembly assembly (3) includes a connecting frame (7) and a sliding sleeve (12). The front beam (1) and the rear beam (2) are rotatably connected by the connecting frame (7). The sliding sleeve (12) has a U-shaped groove in its side wall that cooperates with the connecting frame (7). The sliding sleeve (12) is fitted on the outside of the mating surface of the front beam (1) and the rear beam (2). The sliding sleeve (12) is fitted on the outside of the rear beam (2) and is elastically slidably connected to the rear beam (2) by a spring.
2. The electric bicycle frame with a quick-release mechanism according to claim 1, characterized in that: The connecting frame (7) includes a movable frame (8), which fits against the side wall of the front beam (1) and is fixedly connected to the front beam (1). A fixed frame (9) that cooperates with the movable frame (8) is fixedly connected to the outer side of the rear beam (2). A connecting sleeve (10) is provided through the inside of the fixed frame (9) and the connecting sleeve (10) is rotatably connected to the fixed frame (9). The movable frame (8) and the connecting sleeve (10) are connected by a pin (11).
3. The electric bicycle frame with a quick-release mechanism according to claim 2, characterized in that: The pin (11) passes through the fixing frame (9) and the connecting sleeve (10) and is threadedly connected to both the fixing frame (9) and the connecting sleeve (10).
4. The electric bicycle frame with a quick-release mechanism according to claim 3, characterized in that: The inner side of the sliding sleeve (12) is provided with two levers (13) that are symmetrically distributed vertically. The front beam (1) and the rear beam (2) are both provided with grooves (14) that cooperate with the levers (13). The levers (13) are located in the grooves (14) in the front beam (1), and the end of the lever (13) near the rear beam (2) is rotatably connected to the front beam (1) through a torsion spring.
5. The electric bicycle frame with a quick-release mechanism according to claim 4, characterized in that: An auxiliary frame (15) is fixedly connected to the outside of the lever (13). The auxiliary frame (15) has a T-shaped structure.
6. The electric bicycle frame with a quick-release mechanism according to claim 1, characterized in that: The two ends of the spring are welded and fixed to the sliding sleeve (12) and the support seat (5), respectively.