Folding joint self-locking mechanism of electric bicycle
By using a gear and toothed plate meshing design, the fixed pin and plug are driven to insert into the through hole and the socket, which solves the problem of the electric bicycle folding joint not locking securely and achieves higher locking strength and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 天津萝贝智能机器人有限公司
- Filing Date
- 2025-05-09
- Publication Date
- 2026-05-19
AI Technical Summary
The existing folding joints of electric bicycles are not securely locked and are prone to loosening, posing a safety hazard and limiting the market promotion of the product.
The design employs a gear and toothed plate meshing mechanism. By moving the gear, the toothed plate is displaced up and down, causing the fixing pin to be inserted into the through hole of the extension block. The pin is then inserted into the insertion hole via a rod, and the spring's squeezing force enhances the locking effect.
It improves locking strength, prevents loosening of the locking point, enhances the stability of the self-locking mechanism, and improves safety in use.
Smart Images
Figure CN224256844U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric bicycle folding self-locking technology, and in particular to a self-locking mechanism for the folding joint of an electric bicycle. Background Technology
[0002] Electric bicycles are mechatronic personal transportation vehicles that use batteries as auxiliary power and are based on ordinary bicycles, with motors, controllers, batteries, throttles, and other control components and display instrument systems installed. In order to achieve portability, the frames of current electric bicycles are mostly divided into two by a crossbeam and positioned by a locking structure, so that the electric bicycle can be folded when not in use.
[0003] The prior art patent CN211810043U discloses a self-locking structure for a bicycle folding mechanism, comprising a first connecting plate, a second connecting plate, a quick-release handle, and a locking link forming a four-bar linkage. The first and second connecting plates are hinged together on one side. One end of the quick-release handle is pivotally connected to the first connecting plate, and the other end is provided with a first pin connecting to the locking link. The second connecting plate is provided with a second pin connecting to the locking link. A self-resetting locking pin is provided on the quick-release handle. The first pin has a locking hole that mates with the self-resetting locking pin, and the self-resetting locking pin has an unlocking mechanism. The push block unlocks the device manually. The self-resetting locking pin, moving with the push block, unlocks the first pin, opening the quick-release handle for folding. When the locking hole of the first pin rotates to the position corresponding to the self-resetting locking pin, the reset spring drives the self-resetting locking pin to insert into the locking hole, forming a self-lock. The operation is simple and convenient.
[0004] However, existing folding joints are all locked by a locking element, which has poor locking strength in practical applications, often resulting in insecure locking and loosening of the folding joint. This causes many inconveniences in use and poses certain safety hazards, making it difficult to meet high standards and limiting the market promotion and expansion of the product. Utility Model Content
[0005] In order to overcome the problems of existing self-locking mechanisms, such as poor locking strength, insufficient firmness, and easy loosening of joints, which have certain drawbacks.
[0006] The technical solution of this utility model is as follows: a folding joint self-locking mechanism for an electric bicycle, including a first connecting plate and a second connecting plate. An adjusting handle is rotatably connected inside the second connecting plate. A fixing block is fixedly connected to the front end face of the adjusting handle. Through holes are opened on both the left and right sides inside the fixing block. A movable groove is opened inside the adjusting handle. A guide rod is fixedly connected inside the movable groove. A guide block is slidably sleeved on the outside of the guide rod. A rotating shaft is connected through the inside of the guide rod. A gear is sleeved on the outside of the rotating shaft. A toothed plate located at the front end of the guide block is meshed with the front end of the gear. A fixing plate is fixedly connected to the lower end face of the toothed plate. Fixing pins are fixedly connected to both the left and right sides of the lower end face of the fixing plate. Insertion holes are opened on both the left and right sides inside the fixing pins. A fixing rod is fixedly connected inside the first connecting plate. A fixing sleeve is fixedly connected to the outside of the fixing rod. An extension block is fixedly connected to the rear end face of the fixing sleeve. Through holes are opened on both the left and right sides inside the extension block. A spring is provided inside the extension block. Insertion rods are fixedly connected to both the left and right sides of the spring.
[0007] Preferably, the meshing action between the gear and the toothed plate allows the toothed plate to move up and down, which in turn moves the two fixed pins so that they are inserted into the through holes opened inside the extension block for fixation. At the same time, the insert rod is inserted into the insertion hole for fixation, thereby enhancing the locking effect of the self-locking mechanism, preventing loosening at the locking point, and improving the locking effect.
[0008] Preferably, the adjustment handle is rotatably connected to the second connecting plate by a long shaft.
[0009] Preferably, the internal groove of the fixing block is a courtyard-shaped groove, and the fixing sleeve is inserted into the groove.
[0010] Preferably, connecting rods are fixedly connected to both the left and right sides of the fixed plate and the guide block.
[0011] Preferably, a hinge shaft is movably connected between one side of the first connecting plate and the second connecting plate.
[0012] Preferably, the guide rod has a through groove inside, and the rotating shaft and the guide rod are connected through the through groove.
[0013] Preferably, both fixing pins are inserted through the two through holes, and both insert rods are inserted into the two sockets.
[0014] The beneficial effects of this utility model are:
[0015] This electric bicycle folding joint self-locking mechanism rotates a gear, and the meshing action between the gear and the toothed plate causes the toothed plate to move up and down, which in turn moves two fixing pins. These pins are then inserted into through holes in the extension block for fixation. Simultaneously, the inserts on both sides of the extension block are pressed together and finally inserted into the holes inside the fixing pins for secure insertion. This enhances the locking effect of the self-locking mechanism, prevents loosening at the locking point, and improves the locking performance. Attached Figure Description
[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the electric bicycle folding joint self-locking mechanism of this utility model.
[0017] Figure 2 This utility model is shown. Figure 1 A magnified schematic diagram of the three-dimensional structure at point A;
[0018] Figure 3 The image shown is a three-dimensional bottom view of the self-locking mechanism for the folding joint of an electric bicycle according to this utility model.
[0019] Figure 4 This utility model is shown. Figure 3 A magnified schematic diagram of the three-dimensional structure at point B;
[0020] Figure 5 The diagram shown is a three-dimensional structural diagram of the cross-section of the fixing rod of this utility model;
[0021] Figure 6 The diagram shown is a three-dimensional structural schematic of the locking pin structure of this utility model.
[0022] Explanation of reference numerals in the attached drawings: 1. First connecting plate; 2. Second connecting plate; 3. Fixing rod; 4. Adjusting handle; 5. Gear plate; 6. Fixing plate; 7. Fixing pin; 8. Fixing block; 9. Through hole; 10. Arc groove; 11. Movable groove; 12. Gear; 13. Rotating shaft; 14. Guide rod; 15. Guide block; 16. Through groove; 17. Fixing sleeve; 18. Insert rod; 19. Spring; 20. Extension block; 21. Insertion hole. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0024] Please see Figures 1-6This utility model provides an embodiment of a folding joint self-locking mechanism for an electric bicycle, comprising a first connecting plate 1 and a second connecting plate 2. An adjusting handle 4 is rotatably connected inside the second connecting plate 2. A fixing block 8 is fixedly connected to the front end of the adjusting handle 4. Through holes 9 are provided on both the left and right sides inside the fixing block 8. A movable groove 11 is provided inside the adjusting handle 4. A guide rod 14 is fixedly connected inside the movable groove 11. A guide block 15 is slidably sleeved on the outside of the guide rod 14. A rotating shaft 13 is passed through the inside of the guide rod 14. A gear 12 is sleeved on the outside of the rotating shaft 13. The front end of the 2 is engaged with a toothed plate 5 located at the front end of the guide block 15. A fixing plate 6 is fixedly connected to the lower end face of the toothed plate 5. Fixing pins 7 are fixedly connected to both the left and right sides of the lower end face of the fixing plate 6. Insertion holes 21 are opened on both the left and right sides inside the fixing pins 7. A fixing rod 3 is fixedly connected to the inside of the first connecting plate 1. A fixing sleeve 17 is fixedly connected to the outside of the fixing rod 3. An extension block 20 is fixedly connected to the rear end face of the fixing sleeve 17. Through holes 9 are opened on both the left and right sides inside the extension block 20. A spring 19 is installed inside the extension block 20. Insert rods 18 are fixedly connected to both the left and right sides of the spring 19.
[0025] Please see Figures 1-2 In this embodiment, a long shaft is rotatably connected between the adjustment handle 4 and the second connecting plate 2. The interior of the fixing block 8 is fitted with the arc-shaped groove 10 of the courtyard house. The fixing sleeve 17 is fitted into the arc-shaped groove 10. Connecting rods are fixedly connected to both the left and right sides of the fixing plate 6 and the guide block 15. The first connecting plate 1 and the second connecting plate 2 are folded by a hinge shaft. By rotating the adjustment handle 4, the fixing sleeve 17 is fitted into the arc-shaped groove 10 inside the fixing block 8 for fixation. By turning the gear 12, the gear 12 is rotated and meshes with the toothed plate 5, causing the toothed plate 5 to move up and down, and at the same time causing the fixing plate 6 to move up and down.
[0026] Please see Figures 3-5 In this embodiment, a hinge shaft is movably connected between one side of the first connecting plate 1 and the second connecting plate 2. A through groove 16 is provided inside the guide rod 14. The rotating shaft 13 and the guide rod 14 are connected through the through groove 16. Both fixing pins 7 are inserted into the two through holes 9 and both insert rods 18 are inserted into the two insert holes 21. They also drive the fixing pins 7 on the left and right sides of the lower end face of the fixing plate 6 to move and slowly insert into the through holes 9 inside the extension block 20 for fixation. At the same time, the spring 19 squeezes the rods 18 until they are finally inserted into the insert holes 21 inside the fixing pins 7 for reinforcement.
[0027] During operation, the first connecting plate 1 and the second connecting plate 2 are folded by the hinge shaft. By rotating the adjustment handle 4, the fixing sleeve 17 is engaged with the arc-shaped groove 10 inside the fixing block 8 for fixation. By turning the gear 12, the gear 12 is rotated and meshes with the toothed plate 5, causing the toothed plate 5 to move up and down. At the same time, the fixing plate 6 moves up and down, and the fixing pins 7 on the left and right sides of the lower end face of the fixing plate 6 are also moved and slowly inserted into the through hole 9 inside the extension block 20 for fixation. At the same time, the spring 19 squeezes the pin, and finally the insertion rod 18 is inserted into the insertion hole 21 inside the fixing pin 7 for reinforcement.
[0028] Through the above steps, by turning gear 12 to rotate, and through the meshing action between gear 12 and toothed plate 5, toothed plate 5 can move up and down, and drive two fixed pins 7 to move, so that the fixed pins 7 are inserted into the through hole 9 opened inside the extension block 20 for fixing. This solves the problem that the existing self-locking mechanism has poor locking strength, is not firm enough, and is prone to loosening of the joint, which has certain drawbacks to a certain extent.
Claims
1. A folding joint self-locking mechanism for an electric bicycle, comprising a first connecting plate (1), characterized in that: It also includes a second connecting plate (2), an adjusting handle (4) is rotatably connected inside the second connecting plate (2), a fixing block (8) is fixedly connected to the front end face of the adjusting handle (4), through holes (9) are provided on both the left and right sides inside the fixing block (8), a movable groove (11) is provided inside the adjusting handle (4), a guide rod (14) is fixedly connected inside the movable groove (11), a guide block (15) is slidably sleeved on the outside of the guide rod (14), a rotating shaft (13) is connected through the inside of the guide rod (14), a gear (12) is sleeved on the outside of the rotating shaft (13), and the front end of the gear (12) is meshed with a tooth located at the front end of the guide block (15). A fixing plate (6) is fixedly connected to the lower end face of the plate (5) and the toothed plate (5). Fixing pins (7) are fixedly connected to the left and right sides of the lower end face of the fixing plate (6). Insertion holes (21) are opened on the left and right sides inside the fixing pins (7). A fixing rod (3) is fixedly connected to the inside of the first connecting plate (1). A fixing sleeve (17) is fixedly connected to the outside of the fixing rod (3). An extension block (20) is fixedly connected to the rear end face of the fixing sleeve (17). Through holes (9) are opened on the left and right sides inside the extension block (20). A spring (19) is installed inside the extension block (20). Insert rods (18) are fixedly connected to the left and right sides of the spring (19).
2. The self-locking mechanism for the folding joint of an electric bicycle according to claim 1, characterized in that: The adjustment handle (4) and the second connecting plate (2) are connected by a long shaft.
3. The electric bicycle folding joint self-locking mechanism according to claim 1, characterized in that: The internal groove of the fixing block (8) is the arc-shaped groove (10) of the courtyard house, and the fixing sleeve (17) is inserted into the arc-shaped groove (10).
4. The electric bicycle folding joint self-locking mechanism according to claim 1, characterized in that: Connecting rods are fixedly connected to both the left and right sides of the fixed plate (6) and the guide block (15).
5. The self-locking mechanism for a folding joint of an electric bicycle according to claim 1, characterized in that: A hinge shaft is movably connected between one side of the first connecting plate (1) and the second connecting plate (2).
6. The self-locking mechanism for a folding joint of an electric bicycle according to claim 1, characterized in that: The guide rod (14) has a through groove (16) inside, and the rotating shaft (13) and the guide rod (14) are connected through the through groove (16).
7. The self-locking mechanism for the folding joint of an electric bicycle according to claim 1, characterized in that: Both fixed pins (7) are inserted through the two through holes (9), and both insert rods (18) are inserted into the two insert holes (21).