A retraction and extension type charging pile
By introducing a protective shell, winding reel, limiting cover, and rotation drive mechanism into the charging station, combined with the design of spiral grooves and limiting covers, automatic charging cable winding and unwinding is achieved, solving the problem of exposed charging cables, simplifying maintenance, reducing costs, and facilitating market promotion.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 潘胜
- Filing Date
- 2025-08-06
- Publication Date
- 2026-06-19
AI Technical Summary
Existing charging stations lack automatic cable retraction functionality, resulting in exposed charging cables that affect the appearance and pose a risk of being crushed. Furthermore, existing automatic cable retraction mechanisms are complex and costly, making them difficult to promote and apply.
Design a cable rewinding charging station, which adopts a protective shell, a winding reel, a limiting cover and a rotation drive mechanism. Combined with the radial limiting of the spiral groove and the limiting cover, the motor drives the winding reel to rotate forward and backward to realize the automatic rewinding and unwinding of the charging cable.
It enables automatic and orderly storage and retraction of charging cables, simplifies maintenance and repair, reduces manufacturing costs, facilitates market promotion and application, and improves ease of use.
Smart Images
Figure CN224375360U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of charging pile technology, specifically a retractable charging pile. Background Technology
[0002] Charging stations, as supporting infrastructure for electric vehicles, are an indispensable part of providing charging services. With the continuous development of society and the economy, the number of electric vehicles is constantly increasing, which in turn leads to a continuous increase in the number of charging stations.
[0003] To facilitate flexible charging, existing charging stations typically have charging cables of a certain length. Since most existing charging stations lack automatic cable retraction, these long cables remain exposed after use. Exposed cables make the charging station look untidy, and cables lying on the ground are at risk of being run over by vehicles, making them easily damaged. While some existing charging stations do have automatic cable retraction mechanisms, these mechanisms are often complex, leading to inconvenient maintenance and repair. Furthermore, their high manufacturing costs hinder widespread market adoption. Utility Model Content
[0004] The purpose of this utility model is to provide a retractable charging pile with a simple structure that is easy to maintain and repair. At the same time, its manufacturing cost is low, which is conducive to its full promotion and application in the market.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a retractable charging pile, including a protective shell, a winding reel, a limiting cover, and a rotation drive mechanism. A first cable passage is provided on one side of the protective shell. The winding reel is rotatably disposed inside the protective shell. The rotation drive mechanism is disposed inside the protective shell and can drive the winding reel to rotate. The limiting cover is snapped onto the outside of the winding reel and is fixedly connected to the protective shell. A second cable passage adjacent to the first cable passage is provided on the side wall of the limiting cover. A spiral groove is provided on the side wall of the winding reel.
[0006] Preferably, the gap height between the inner wall of the limiting cover and the outer wall of the winding spool is L1, and the value of L1 is smaller than the diameter of the charging wire wound on the winding spool.
[0007] Preferably, the depth of the spiral groove is greater than or equal to the radius of the charging wire wound therein.
[0008] Furthermore, the retractable charging station also includes an end cap that snaps onto the front of the protective housing.
[0009] Furthermore, the rotation drive mechanism includes a first support shaft, which is used to provide rotational support for the winding reel.
[0010] Furthermore, the rotation drive mechanism also includes a first drive motor, which is fixedly installed inside the protective housing. One end of the first support shaft is sleeved on the output shaft of the first drive motor, and the other end is rotatably sleeved on the side wall of the end cover. The winding disc is connected to the first support shaft by a key drive.
[0011] Furthermore, the rotation drive mechanism also includes a second drive motor and a drive gear. The winding disc is rotatably mounted on the first support shaft. The second drive motor is fixedly installed inside the protective shell. A one-circular transmission tooth is provided on the rear outer side of the winding disc. The drive gear meshes with the transmission tooth. The second drive motor is used to drive the drive gear to rotate.
[0012] Furthermore, the retractable charging pile also includes a power cord, a charging cord, and a through-hole conductive slip ring. The through-hole conductive slip ring is sleeved on the first support shaft, and the rotor of the through-hole conductive slip ring is rotatably sleeved on the first support shaft. The stator of the through-hole conductive slip ring is fixedly clamped on the end cover. One end of the power cord is electrically connected to a power source, and the other end is rotatably connected to the stator of the through-hole conductive slip ring. The charging cord is spirally wound in the spiral groove, and one end of the charging cord passes through a wire hole provided on the side wall of the winding reel and is electrically connected to the rotor of the through-hole conductive slip ring. The other end of the charging cord passes through the second wire hole and the first wire hole in sequence and is electrically connected to a charging plug.
[0013] Furthermore, anti-slip textures are provided on the sidewall of the spiral groove, and the inner sidewall of the limiting cover opposite to the winding disc is a smooth surface.
[0014] Furthermore, a rubber tube is fitted inside the wire hole.
[0015] The beneficial effects of this utility model are as follows: The utility model has a simple structure, thus facilitating its maintenance and repair during subsequent use; simultaneously, it is easy to manufacture and has low manufacturing costs, thereby facilitating its widespread promotion and application in the market. For example, this utility model can be installed and applied in private parking spaces in underground garages; during the winding operation, the spiral groove guides the winding of the charging cable, and the limiting cover radially limits the charging cable, facilitating orderly single-layer winding of the charging cable on the winding reel, thus achieving automatic winding operation; during the unwinding operation, the inherent rigidity of the charging cable, the radial limiting effect of the limiting cover, and the friction between the winding reel and the charging cable greatly improve the success rate of automatic unwinding without manual assistance, thereby enhancing the ease of use; during the unwinding operation, if manual assistance is used to pull the charging cable outwards, the smooth pulling out of the charging cable can be ensured. The forward and reverse rotation of the winding reel is driven by a motor. Because the forward and reverse rotation control of the motor is extremely simple, the winding and unwinding of the charging cable is also extremely simple. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of the first specific embodiment of the present utility model;
[0018] Figure 2 This is a schematic diagram of the overall structure of the limiting cover;
[0019] Figure 3 A schematic diagram showing the combination of a second specific embodiment of the rotary drive mechanism and a winding disk;
[0020] Figure 4 This is a longitudinal sectional view showing the distribution of the winding reels within the limiting cover;
[0021] Figure 5 for Figure 1 Enlarged view of point A in the middle;
[0022] Figure 6 for Figure 4 Enlarged view at point B in the middle;
[0023] In the figure: 1 protective shell, 11 first wire passage hole, 2 winding disc, 21 spiral groove, 22 transmission gear, 23 rubber tube, 3 guide cover, 31 second wire passage, 32 opening groove, 41 first support shaft, 42 first drive motor, 43 second drive motor, 431 motor mounting base, 44 drive wheel, 5 through hole conductive slip ring. Detailed Implementation
[0024] The following will describe specific embodiments and appendices. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some preferred embodiments of this utility model, and not all embodiments. Those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0025] This utility model provides a retractable charging pile (such as...) Figure 1As shown, the device includes a protective shell 1, a winding reel 2, a limiting cover 3, and a rotation drive mechanism. In actual manufacturing, the protective shell 1, winding reel 2, and limiting cover 3 can all be made of plastic materials, thus facilitating the lightweight design of this invention and enabling it to be stably fixed to a wall. A first cable passage 11 is provided on one side of the protective shell 1, allowing the charging cable inside the protective shell 1 to be easily pulled out, facilitating cable rewinding and unwinding operations. The winding reel 2 is rotatably disposed inside the protective shell 1. During application, the winding reel 2 rotates to retract and extend the charging cable. The rotation drive mechanism is located inside the protective shell 1. This mechanism drives the winding reel 2 to rotate. To facilitate stable and orderly cable winding, the winding reel 2 is circular. Furthermore, for lightweight design, it is essentially hollow and ring-shaped, with the charging cable wrapping around its outer surface. The limiting cover 3 is snapped onto the outside of the winding reel 2, and the limiting cover 3 is... The protective shell 1 is fixedly connected. Specifically, the limiting cover 3 is open at one end and closed at the other. Several fixing lugs are provided on one side of the open end, and these lugs are fixedly connected to the inner wall of the protective shell 1 using screws. In practical applications, the limiting cover 3 provides radial restraint for the charging cable wound on the winding reel 2, effectively preventing the charging cable from becoming severely loose and allowing for orderly winding and unwinding. A second cable passage 31, adjacent to the first cable passage 11, is provided on the side wall of the limiting cover 3. The free end of the charging cable enters the first cable passage 11 through the second cable passage 31. A spiral groove 21 is provided on the side wall of the winding reel 2. During the winding operation, the limiting cover 3 limits the radial movement of the charging cable, so that the bottom of the charging cable is basically locked in the spiral groove 21. On this basis, during the rotation of the spiral groove 21, the spiral groove 21 limits the axial movement of the charging cable, so that the charging cable will be orderly and neatly wound in the spiral groove 21, thereby facilitating the orderly and automatic winding operation of the charging cable.
[0026] Based on the above embodiments, the gap height between the inner wall of the limiting cover 3 and the outer wall of the winding reel 2 is L1. The value of L1 is smaller than the diameter of the charging cable wound on the winding reel 2. When the value of L1 is smaller than the diameter of the charging cable, the limiting cover 3 provides radial limiting for the charging cable, making it difficult for the charging cable to get stuck between the inner wall of the limiting cover 3 and the outer wall of the winding reel 2. This effectively prevents the charging cable from having double-layer overlapping winding on the outer side of the winding reel 2, thus facilitating the orderly and regular winding of the charging cable. Furthermore, when the winding reel 2 rotates automatically to perform the winding operation, the spiral groove 21 is used to facilitate charging. The axial movement of the wire is driven and guided by the fact that the depth of the spiral groove 21 is greater than or equal to the radius of the charging wire wound therein, and at least half of the charging wire in the radial direction is engaged in the spiral groove 21. When the spiral groove 21 rotates, it is easy to push the charging wire axially, thereby facilitating the orderly winding of the charging wire inside the spiral groove 21. In this specific embodiment, in order to effectively ensure that the charging wire is automatically wound in a single layer in an orderly manner on the winding spool 2, L1 is 3mm, and the cross-section of the spiral groove 21 is U-shaped, and the depth and width of the spiral groove 21 are equal to the diameter of the charging wire.
[0027] Based on the above embodiments, in order to improve the dustproof capability of the charging pile, an end cap 6 is provided at the front of the protective shell 1. The end cap 6 can be fixedly connected to the protective shell 2 by a snap-fit connection.
[0028] Based on the above embodiments, the specific implementation of the rotation drive mechanism to drive the winding disc 2 to rotate is as follows: The rotation drive mechanism includes a first support shaft 41, which is used to support the rotation of the winding disc 2. In practical applications, the support of the winding disc 2 by the first support shaft 41 facilitates the free rotation of the winding disc 2. Furthermore, in this specific embodiment, two specific embodiments for driving the winding disc 2 to rotate are designed. The specific implementation of the first embodiment for driving the winding disc 2 to rotate is as follows: The rotation drive mechanism also includes a first drive motor 42, which is fixedly installed inside the protective shell 1. One end of the first support shaft 41 is sleeved on the output shaft of the first drive motor 42, and the other end is rotatably sleeved on the side wall of the end cover 6. The end cover 6 and the output shaft of the first drive motor 42 provide stable support for the first support shaft 41. At the same time, the rotation of the first support shaft 41 is achieved by driving the rotation of the first support shaft 41 by the output shaft of the first drive motor 42. The winding disc 2 uses a key transmission method to achieve transmission with the first support shaft 41. The first support shaft 41 rotates, so the key transmission method is used to drive the rotation of the winding disk 2. The second embodiment for driving the winding disk 2 to rotate is as follows: the rotation drive mechanism further includes a second drive motor 43 and a drive gear 44. The winding disk 2 is rotatably mounted on the first support shaft 41, meaning the winding disk 2 can rotate freely relative to the first support shaft 41. The second drive motor 43 is fixedly installed inside the protective shell 1. Specifically, a motor mounting base 431 can be fixedly installed inside the protective shell 1. The winding reel 2 is fixedly mounted on the motor mounting base 431. A circular transmission tooth 22 is provided on the outer rear part of the winding reel 2. The drive gear 44 meshes with the transmission tooth 22. To facilitate the meshing of the drive gear 44 and the transmission tooth 22, an opening slot 32 is provided at the corresponding position of the limiting cover 3. The drive gear 44 passes through the opening slot 32 and meshes with the transmission tooth 22. The second drive motor 43 is used to drive the drive gear 44 to rotate. During the rotation of the drive gear, the rotation drive of the winding reel 2 is realized by the transmission action of the transmission tooth 22.
[0029] Based on the above embodiments, to facilitate the charging and discharging functions of the charging pile, the retractable charging pile further includes a power cord, a charging cord, and a through-hole conductive slip ring 5. The through-hole conductive slip ring 5 is a known mature technology product in the existing technical field, used to achieve continuous energization between the rotating part and the fixed part. Therefore, the specific structure and working principle of the through-hole conductive slip ring 5 will not be described in detail here. The through-hole conductive slip ring 5 is sleeved on the first support shaft 41, and the rotor of the through-hole conductive slip ring 5 is rotated and sleeved on the first support shaft 41. In actual application, when the first support shaft 41 and the winding disk 2 rotate synchronously, the rotor can be locked and fixed on the first support shaft 41. When the first support shaft 41 and the winding reel 2 rotate asynchronously, the rotor can rotate freely relative to the first support shaft 41. The stator of the through-hole conductive slip ring 5 is fixed on the end cover 6. One end of the power cord is electrically connected to the power source, and the other end is rotatably connected to the stator of the through-hole conductive slip ring 5. The charging cord is spirally wound in the spiral groove 21, and one end of the charging cord passes through a wire hole provided on the side wall of the winding reel 2 and is electrically connected to the rotor of the through-hole conductive slip ring 5. The through-hole conductive slip ring 5 is used to realize the electrical connection between the power cord and the charging cord. The other end of the charging cord passes through the second wire hole 31 and the first wire hole 11 in sequence and is electrically connected to a charging plug.
[0030] In practical applications, in order to facilitate the forward and reverse rotation control of the first drive motor 42 or the second drive motor 43, so as to achieve flexible control of the charging cable retraction and release, two control switches can be provided on the outside of the end cover 6. One control switch realizes the cable retraction operation, and the other control switch realizes the cable release operation.
[0031] Based on the above embodiments, during the winding operation, the winding reel 2 rotates counterclockwise. During this counterclockwise rotation, the axial pushing of the spiral groove 21 and the radial limiting effect of the limiting cover 3 cause the charging cable to sequentially wrap around the spiral groove 21, thus achieving automatic and orderly winding of the charging cable. During the unwinding operation, the winding reel 2 rotates clockwise. During this clockwise rotation, because the charging cable has a certain rigidity, the continuous rotation of the winding reel 2 applies a circumferential pushing action to the charging cable. Simultaneously, the limiting cover 3 acts as a guide for the charging cable as it receives this pushing action from the winding reel 2. A limiting guide allows the charging cable to slowly slide out from the second cable passage 31, thus enabling automatic cable unloading. In practical applications, to enhance the circumferential pushing effect of the winding disc 2 on the charging cable while reducing the obstruction effect of the limiting cover 3, anti-slip textures are provided on the side wall of the spiral groove 21. The inner side wall of the limiting cover 3 opposite to the winding disc 2 is a smooth surface. Furthermore, a rubber tube 23 is fitted inside the cable passage. The friction between the rubber tube 23 and the charging cable is high, thus preventing the charging cable from sliding flexibly when the winding disc 2 rotates to push the charging cable out, thereby facilitating automatic cable unloading.
[0032] In this utility model, "left" and "right" are relative positions used for the convenience of describing positional relationships, and therefore cannot be understood as absolute positions as a limitation on the scope of protection.
[0033] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.
[0034] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. For those skilled in the art, several improvements and modifications can be made without departing from the concept of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.
Claims
1. A retractable charging pile, comprising a protective shell, a winding reel, a first wire passing opening is arranged on one side of the protective shell, and the winding reel is rotationally arranged in the protective shell, characterized in that, The charging pile also includes a limiting cover and a rotation drive mechanism. The rotation drive mechanism is disposed inside the protective shell and can drive the winding reel to rotate. The limiting cover is snapped onto the outside of the winding reel and is fixedly connected to the protective shell. A second wire passage is provided on the side wall of the limiting cover, which is adjacent to the first wire passage. A spiral groove is provided on the side wall of the winding reel.
2. The reel type charging pile according to claim 1, characterized in that, The height of the gap between the inner wall of the limiting cover and the outer wall of the winding spool is L1, and the value of L1 is smaller than the diameter of the charging cable wound on the winding spool.
3. The reel type charging pile according to claim 1, characterized in that, The depth of the spiral groove is greater than or equal to the radius of the charging wire wound within it.
4. The reel type charging pile according to claim 2 or 3, characterized in that, The retractable charging station also includes an end cap that snaps onto the front of the protective housing.
5. The reel type charging pile according to claim 4, characterized in that, The rotation drive mechanism includes a first support shaft, which is used to support the rotation of the winding reel.
6. The reel type charging pile according to claim 5, characterized in that, The rotation drive mechanism further includes a first drive motor, which is fixedly installed inside the protective housing. One end of the first support shaft is sleeved on the output shaft of the first drive motor, and the other end is rotatably sleeved on the side wall of the end cover. The winding disc is connected to the first support shaft by a key transmission method.
7. The reel type charging pile according to claim 5, characterized in that, The rotation drive mechanism further includes a second drive motor and a drive gear. The winding disc is rotatably mounted on the first support shaft. The second drive motor is fixedly installed inside the protective shell. A one-circular transmission tooth is provided on the rear outer side of the winding disc. The drive gear meshes with the transmission tooth. The second drive motor is used to drive the drive gear to rotate.
8. The reel type charging pile according to claim 6 or 7, characterized in that, The retractable charging pile also includes a power cord, a charging cord, and a through-hole conductive slip ring. The through-hole conductive slip ring is sleeved on the first support shaft, and the rotor of the through-hole conductive slip ring is rotatably sleeved on the first support shaft. The stator of the through-hole conductive slip ring is fixedly clamped on the end cover. One end of the power cord is electrically connected to a power source, and the other end is rotatably connected to the stator of the through-hole conductive slip ring. The charging cord is spirally wound in the spiral groove, and one end of the charging cord passes through a wire hole provided on the side wall of the winding reel and is electrically connected to the rotor of the through-hole conductive slip ring. The other end of the charging cord passes through the second wire hole and the first wire hole in sequence and is electrically connected to a charging plug.
9. The reel type charging pile according to claim 8, characterized in that, Anti-slip textures are provided on the sidewall of the spiral groove, and the inner sidewall of the limiting cover opposite to the winding reel is a smooth surface.
10. The reel type charging pile according to claim 9, characterized in that, A rubber tube is fitted inside the wire hole.