A wear-resistant automatic cable retraction device for charging piles

Abstract

This utility model discloses an anti-wear automatic cable reel device for charging piles, relating to the field of charging pile technology. It includes a charging pile with a mounting base fixed to its lower end, the mounting base being connected to the ground. A charging gun is installed at the front end of the charging pile, and the charging pile and the charging gun are electrically connected via a fixed power cord. An automatic cable reel is installed on the power cord. This utility model achieves automatic cable reel reeling through the cooperation of a coil spring and a cable reel, eliminating the need for manual cable handling and improving user convenience. A limiting structure composed of a one-way toothed disc and a locking toothed disc ensures smooth operation during cable release and controllability during cable reeling. The structure is simple and highly reliable. Protective silicone anti-wear parts are provided at the cable inlet and outlet holes to reduce frictional loss during cable release and reeling, extending the service life of the power cord.

Description

Technical Field

[0001] This utility model relates to the field of charging pile technology, specifically to an anti-wear automatic cable retraction device for charging piles. Background Technology

[0002] Charging piles are devices that provide electric vehicles with electrical energy. They connect to vehicles through dedicated interfaces and convert grid power into DC or AC power that can be stored in the vehicle's battery. They are an important infrastructure for the popularization of new energy vehicles, helping to promote green travel and energy transformation. With the popularization of new energy vehicles, the convenience and safety of charging piles as important supporting facilities have attracted much attention.

[0003] The existing technology still has some problems: the power cord between the charging pile and the charging gun is usually designed to be of fixed length or manually retractable. When the power cord is too long, the excess cable is easy to drag on the ground, and friction with the ground will cause wear on the outer sheath, which not only affects the service life, but may also pose a risk of leakage. Manual retraction increases the user's operation steps and results in a poor user experience.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the above-mentioned defects and provide an anti-wear automatic cable retraction device for charging piles.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0007] An anti-wear automatic cable retraction device for charging piles includes a charging pile, with a mounting base fixed to the lower end of the charging pile and the mounting base connected to the ground. A charging gun is provided at the front end of the charging pile, and the charging pile and the charging gun are electrically connected by a fixed power line.

[0008] An automatic retractor is provided, which is mounted on a power cord. A charging gun is located outside the automatic retractor. The automatic retractor includes a housing, which is composed of a first outer shell and a second outer shell that are threaded together. An inlet hole and an outlet hole are respectively opened in the middle of both sides of the housing. The charging gun is located on one side of the outlet hole. The power cord can freely pass through the outlet hole during the retracting and unretracting process.

[0009] Anti-wear parts can be detachably installed on the side walls of both the inlet and outlet holes;

[0010] The front end of the second outer shell is rotatably connected to a rotating shaft. A winding reel is provided inside the outer shell and is rotatably connected to the rotating shaft. The power cord is wound around the outer periphery of the winding reel. A cavity is opened inside the winding reel, and a coil spring is provided inside the cavity to drive the winding reel to automatically reel in the cord.

[0011] The winding reel is controlled by a limiting structure, which includes a meshing one-way toothed disc and a locking toothed disc. The engagement and disengagement of the locking toothed disc and the one-way toothed disc control the unwinding and rewinding of the wire.

[0012] As an improvement, the one-way toothed disc is fixedly connected to the middle of the front end of the winding reel, the locking toothed disc is engaged with the front end of the one-way toothed disc, and a number of guide posts are fixedly connected to the front end of the one-way toothed disc. The front end of the guide posts passes through the outer shell and is fixedly connected to a connecting plate. The guide posts are movably connected to the outer shell.

[0013] As an improvement, a pull part is fixedly connected to the front end of the connecting plate.

[0014] As an improvement, a spring is sleeved on the outside of the guide post, and the front and rear ends of the spring are fixedly connected to the outer shell and the locking gear plate, respectively.

[0015] As an improvement, the inner end of the coil spring is fixedly connected to the rotating shaft, and the outer end of the coil spring is fixedly connected to the outer wall inside the cavity.

[0016] As an improvement, the direction in which the one-way toothed disc and the locking toothed disc engage is the same as the direction in which the coil spring rebounds and drives the winding reel to rotate.

[0017] As an improvement, a fixing plate is fixedly connected to the front end of the charging pile, and both the outer shell one and the outer shell two are connected to the fixing plate by brackets fixed at their lower ends.

[0018] As an improvement, an extension plate is fixedly connected to the side of the fixing plate near the charging gun, and a storage sleeve is fixedly connected to the upper end of the extension plate, with the output end of the charging gun snapped into the storage sleeve.

[0019] As an improvement, the diameter of the charging gun is larger than the diameter of the outlet hole.

[0020] As an improvement, the anti-wear part is protective silicone.

[0021] The advantages of this utility model compared with the prior art are as follows: the automatic winding of the power cord is achieved through the cooperation of the coiling spring and the winding reel, eliminating the need for manual cable management and improving user convenience; the limiting structure composed of a one-way toothed disc and a locking toothed disc ensures smooth operation during cable release and controllability during cable retraction, resulting in a simple structure and high reliability; protective silicone anti-wear parts are provided at the cable inlet and outlet holes to reduce frictional loss during the power cord winding and release process and extend the service life of the power cord. Attached Figure Description

[0022] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0023] Figure 1 This is an overall schematic diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the automatic retractor of this utility model. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the automatic retractor of this utility model. Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the limiting structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the locking gear disc of this utility model. Figure 1 ;

[0028] Figure 6 This is a schematic diagram of the locking gear disc of this utility model. Figure 2 ;

[0029] Figure 7 This is a cross-sectional schematic diagram of the present invention;

[0030] Figure 8 This is a schematic diagram of the outer shell of this utility model;

[0031] As shown in the figure: 1. Charging pile; 2. Mounting base; 3. Charging gun; 4. Power cord; 5. Automatic retractor; 6. Outer shell 1; 7. Outer shell 2; 8. Cable inlet; 9. Cable outlet; 10. Anti-wear part; 11. Rotating shaft; 12. Cable reel; 13. Cavity; 14. Coil spring; 15. One-way toothed disc; 16. Locking toothed disc; 17. Guide post; 18. Connecting plate; 19. Pulling part; 20. Spring; 21. Fixing plate; 22. Bracket; 23. Extension plate; 24. Storage sleeve. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] Example 1:

[0034] like Figures 1-8 As shown, this utility model provides an anti-wear automatic cable retractor for charging piles, including a charging pile 1 and an automatic cable retractor 5. The lower end of the charging pile 1 is fixedly connected to a mounting base 2, which is attached to the ground. A charging gun 3 is installed at the front end of the charging pile 1, and the charging pile 1 and the charging gun 3 are electrically connected by a fixed power cord 4.

[0035] Then, the automatic retractor 5 is mounted on the power cord 4, and the charging gun 3 is located outside the automatic retractor 5. The automatic retractor 5 includes a housing, which is composed of a first outer shell 6 and a second outer shell 7 that are threaded together. The middle of the two sides of the housing has an inlet hole 8 and an outlet hole 9, respectively. The charging gun 3 is located on one side of the outlet hole 9. The power cord 4 can freely pass through the outlet hole 9 during the winding and unwinding process. The diameter of the charging gun 3 is larger than the diameter of the outlet hole 9, which can prevent the charging gun 3 from entering the housing of the automatic retractor 5 during the winding process. The middle of the front end of the second outer shell 7 is rotatably connected to a rotating shaft 11. A winding reel 12 is provided inside the housing and is rotatably connected to the rotating shaft 11. The power cord 4 is wound around the outer circumference of the winding reel 12. A cavity 13 is opened inside the winding reel 12. A coil spring 14 is provided inside the cavity 13 to drive the winding reel 12 to automatically wind up the cord. The inner end of the coil spring 14 is fixedly connected to the rotating shaft 11, and the outer end of the coil spring 14 is fixedly connected to the outer wall inside the cavity 13.

[0036] To control the winding and unwinding of the reel 12, a limiting structure is used. The limiting structure includes a meshing one-way toothed disc 15 and a locking toothed disc 16. The winding and unwinding are controlled by the meshing and disengagement of the locking toothed disc 16 and the one-way toothed disc 15. The one-way toothed disc 15 is fixedly connected to the middle of the front end of the reel 12, and the locking toothed disc 16 is meshed with the front end of the one-way toothed disc 15. Several guide posts 17 are fixedly connected to the front end of the one-way toothed disc 15. The front end of the guide posts 17 passes through the outer shell 6 and is fixedly connected to a connecting plate 18. The guide posts 17 are movably connected to the outer shell 6. A pulling part 19 is fixedly connected to the front end of the connecting plate 18. A spring 20 is sleeved on the outside of the guide posts 17. The front and rear ends of the spring 20 are fixedly connected to the outer shell 6 and the locking toothed disc 16, respectively. The direction in which the one-way toothed disc 15 and the locking toothed disc 16 engage is the same as the direction in which the coil spring 14 rebounds and drives the reel 12 to rotate.

[0037] The working principle is as follows: the tooth surface of the one-way toothed disc 15 is designed to be tilted in one direction, allowing the winding disc 12 to rotate freely in the unwinding direction, while it is locked in the winding direction by the locking toothed disc 16. The tooth shape of the locking toothed disc 16 matches that of the one-way toothed disc 15, and its back side is always engaged with the one-way toothed disc 15 by the spring 20.

[0038] During the unwinding process, the winding reel 12 drives the one-way toothed disc 15 to rotate. The tooth surface of the one-way toothed disc 15 pushes the teeth of the locking toothed disc 16 to overcome the elastic force of the spring 20 and briefly separate them. Then the spring 20 resets and the two re-engage. This process is repeated to ensure smooth unwinding and prevent sudden rebound.

[0039] When it is time to reel in the wire, the pulling part 19 drives the locking toothed disc 16 to move forward through the connecting plate 18 and the guide post 17. The two are completely separated, and the winding disc 12 freely reverses to reel in the wire under the action of the winding spring 14. The guide post 17 and the housing 6 are in a movable connection clearance fit to ensure that the locking toothed disc 16 only moves axially, avoiding radial offset from affecting the meshing accuracy.

[0040] After the line is wound up, the pull part 19 is released, and the rebound force of the spring 20 pushes the locking toothed disc 16 to move backward. Its teeth are re-engaged into the tooth groove of the one-way toothed disc 15. Since the winding disc 12 has no tendency to rotate at this time, the two are tightly meshed to achieve reliable locking.

[0041] In summary, the entire operation process can be summarized as follows: In the initial state, the power cord 4 is wound around the outer circumference of the reel 12, and the coil spring 14 is in a naturally relaxed state. The user takes out the charging gun 3 and pulls it outward. The power cord 4 drives the reel 12 to rotate clockwise around the shaft 11. At this time, the coil spring 14 is wound up and stores elastic potential energy. During the unwinding process, when the power cord 4 passes through the outlet hole 9 and is pulled out to the required length, the user stops pulling. The reel 12 has a tendency to reverse due to the rebound force of the coil spring 14, but the one-way toothed disc 15 engages with the locking toothed disc 16. Under the action of the spring 19, the power cord 4 remains stationary, thus fixing its length. After charging is completed, the connecting plate 18 and guide post 17 are moved forward by the pulling part 19, causing the locking toothed disc 16 to separate from the one-way toothed disc 15. The coil spring 14 releases its elastic potential energy, causing the winding disc 12 to rotate in the opposite direction, rewinding the power cord 4 onto the winding disc 12 until the charging gun 3 is pulled back to a position close to the outlet hole 9. After releasing the pulling part 19, the spring 20 pushes the locking toothed disc 16 to reset, re-engage with the one-way toothed disc 15, and restore the locking state.

[0042] Example 2:

[0043] To facilitate the installation and placement of the automatic retractor 5 and the charging gun 3, this utility model also provides a second embodiment, in conjunction with the appendix. Figure 1As shown in Embodiment 2, a fixing plate 21 is fixedly connected to the front end of the charging pile 1. Both the outer shell 6 and the outer shell 7 are connected to the fixing plate 21 by brackets 22 fixed at their lower ends. The fixing plate 21 and the brackets 22 achieve stable installation of the automatic retractor 5. An extension plate 23 is fixedly connected to the side of the fixing plate 21 near the charging gun 3. A storage sleeve 24 is fixedly connected to the upper end of the extension plate 23. The output end of the charging gun 3 is snapped into the storage sleeve 24, which facilitates the storage and protection of the charging gun 3 when it is not in use.

[0044] Example 3:

[0045] Because frequent winding and unwinding of the power cord 4 can cause wear and tear, affecting its service life, this utility model also provides an embodiment three, in conjunction with the appendix. Figures 1-8 As shown, in Embodiment 3, anti-wear parts 10 are detachably installed on the side walls of both the inlet hole 8 and the outlet hole 9. The anti-wear parts 10 are made of protective silicone, which can reduce the friction between the power cord 4 and the inlet hole 8 when the cord is wound up and unwound. Since the housing is composed of outer shell 6 and outer shell 7 that are threaded together, the outer shell 6 and outer shell 7 can be disassembled, and the long-term anti-wear parts 10 can be removed and replaced with new anti-wear parts 10 to ensure the service life of the power cord 4.

[0046] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An anti-wear automatic cable retraction device for a charging pile, comprising a charging pile (1), wherein the lower end of the charging pile (1) is fixedly connected to a mounting base (2), the mounting base (2) is connected to the ground, a charging gun (3) is provided at the front end of the charging pile (1), and the charging pile (1) and the charging gun (3) are electrically connected by a fixed power line (4), characterized in that: Automatic retractor (5), the automatic retractor (5) is set on the power cord (4), the charging gun (3) is located outside the automatic retractor (5), the automatic retractor (5) includes a housing, the housing is composed of a first outer shell (6) and a second outer shell (7) that are threaded together at the front and back, the housing has an inlet hole (8) and an outlet hole (9) respectively opened in the middle of both sides, the charging gun (3) is set on one side of the outlet hole (9), the power cord (4) can freely pass through the outlet hole (9) during the winding and unwinding process; The inlet hole (8) and outlet hole (9) are each detachably equipped with a wear-resistant part (10). The outer shell 2 (7) is rotatably connected to the middle of the front end of the shaft (11). A winding reel (12) is provided inside the shell. The winding reel (12) is rotatably connected to the shaft (11). The power cord (4) is wound around the outer periphery of the winding reel (12). A cavity (13) is opened inside the winding reel (12). A coil spring (14) is provided inside the cavity (13) to drive the winding reel (12) to automatically reel in the wire. The winding reel (12) is controlled by a limiting structure, which includes a one-way toothed disc (15) and a locking toothed disc (16) that mesh with each other. The winding and reeling are controlled by the meshing and separation of the locking toothed disc (16) and the one-way toothed disc (15).

2. The anti-wear automatic take-up device for charging piles according to claim 1, characterized in that: The one-way toothed disc (15) is fixedly connected to the middle of the front end of the winding reel (12). The locking toothed disc (16) is engaged with the front end of the one-way toothed disc (15). A number of guide posts (17) are fixedly connected to the front end of the one-way toothed disc (15). The front end of the guide post (17) passes through the outer shell (6) and is fixedly connected to the connecting plate (18). The guide post (17) is movably connected to the outer shell (6).

3. The anti-wear automatic take-up device for charging piles according to claim 2, characterized in that: The front end of the connecting plate (18) is fixedly connected to a pull part (19).

4. The anti-wear automatic take-up device for charging piles according to claim 2, characterized in that: A spring (20) is sleeved on the outside of the guide post (17), and the front and rear ends of the spring (20) are fixedly connected to the outer shell (6) and the locking toothed disc (16) respectively.

5. The anti-wear automatic take-up device for charging piles according to claim 1, characterized in that: The inner end of the coil spring (14) is fixedly connected to the rotating shaft (11), and the outer end of the coil spring (14) is fixedly connected to the outer side wall inside the cavity (13).

6. The anti-wear automatic cable retraction device for charging piles according to claim 5, characterized in that: The direction in which the one-way toothed disc (15) and the locking toothed disc (16) engage is the same as the direction in which the coil spring (14) rebounds and drives the winding disc (12) to rotate.

7. The anti-wear automatic cable retraction device for charging piles according to claim 1, characterized in that: The charging pile (1) is fixedly connected to a fixing plate (21) at the front end. The outer shell one (6) and the outer shell two (7) are both connected to the fixing plate (21) by a bracket (22) fixed at the lower end.

8. The anti-wear automatic cable retraction device for charging piles according to claim 7, characterized in that: An extension plate (23) is fixedly connected to the side of the fixed plate (21) near the charging gun (3). A storage sleeve (24) is fixedly connected to the upper end of the extension plate (23). The output end of the charging gun (3) is snapped into the storage sleeve (24).

9. The anti-wear automatic cable retraction device for charging piles according to claim 1, characterized in that: The diameter of the charging gun (3) is larger than the diameter of the outlet hole (9).

10. The anti-wear automatic cable retraction device for charging piles according to claim 1, characterized in that: The wear-resistant part (10) is a protective silicone.

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