Wire winding box wire winding protection device, household charging pile protection box and automobile charging device

Abstract

The utility model relates to charging pile technical field, concretely is a kind of winding box wire collection protection device, domestic charging pile protection box and automobile charging device;Including winding box, winding reel, drive assembly, charging wire and electric slip ring, winding reel rotatable installation is in winding box, idle shaft is connected with drive assembly transmission, drive assembly drives winding reel rotation below winding box, charging wire is divided into into box line and out of box line, into box line one end connects charging pile power supply bus, the other end connects electric slip ring stator end, out of box line one end connects electric slip ring rotor end, the other end is worn into winding reel pivot, is coiled on winding reel, again through winding box outlet port and is connected charging gun, so not only effectively charging wire is stored in protective box, prevent the damage caused by long time exposure, ensure and prolong the use safety and service life of charging cable, charging wire's automatic winding function is also realized, greatly improve the convenience of charging.

Description

Technical Field

[0001] This utility model relates to the field of charging pile technology, specifically to a cable reel protection device, a home charging pile protection box, and a car charging device. Technical Background

[0002] With the widespread use of electric vehicles and the increasing awareness of environmental protection, more and more families are starting to use electric vehicles, which directly drives the growth in demand for home charging facilities. As an important infrastructure for electric vehicle charging, the design, functionality and durability of charging piles are crucial to the charging experience of electric vehicle users.

[0003] Existing home charging stations are mainly divided into two types: pole-mounted and wall-mounted. Wall-mounted charging stations are fixedly installed on walls or other vertical planes, and are particularly suitable for situations where there is a solid load-bearing wall behind or to the side of the parking space. They save ground space and are less likely to be accidentally bumped by vehicles or pedestrians, making them ideal for garages or parking spaces with limited space. Pole-mounted charging stations, on the other hand, are installed on a separate pole that is fixed to the ground. They are suitable for situations where there is no suitable wall for installation, such as open parking spaces or private yards. The height of the pole can be customized according to the height of the charging port of the vehicle model to meet the needs of different models.

[0004] However, some existing home charging stations still have the following problems: Although some pole-mounted or wall-mounted home charging stations are equipped with hooks that are integrated with the charging port for cable retraction, the charging cable needs to be manually coiled into a loop and looped onto the hook one by one, which is cumbersome. Moreover, the coiled charging cable is usually directly exposed to the outside, causing the charging cable to be exposed to sun and rain for a long time, which can easily lead to aging of the outer sheath of the charging cable, thereby affecting its service life and safety.

[0005] To address the aforementioned issues, Chinese Utility Model Patent Application No. 202321363738.5 discloses a charging pile cable protection structure, comprising a cable take-up box and a charging pile cable. The cable take-up box is a rectangular box with a cable take-up opening between the two sides at the middle of one end. A winding structure for winding the charging pile cable is located between the two sides inside the cable take-up box. The winding structure includes a mounting shaft and a winding roller assembly. The mounting shaft is rotatably mounted at the center between the inner walls of both sides of the cable take-up box. A through hole is formed between the inner and outer walls of one side of the cable take-up box at the mounting shaft location. A winding handwheel is fixedly mounted on the outside of the cable take-up box, near the through hole, passing through the inner wall of the through hole. With this cable take-up box, cleaning box, and winding roller assembly, when the charging pile is idle, rotating the winding handwheel draws the charging pile cable into the cable take-up box and onto the winding roller assembly, thus preventing the charging pile cable from being continuously exposed to wind and sun, which would cause the cable sheath to age and affect its service life.

[0006] However, the existing technology still has the following problems: the winding of the charging cable still needs to be achieved by manually turning the winding handwheel. When the extended charging cable is long, manually turning the winding handwheel will consume a lot of physical strength, making the operation cumbersome and inconvenient for users. Utility Model Content

[0007] In view of this, it is necessary to provide a cable reel protection device to match existing wall-mounted or pole-mounted home charging piles, which can automatically reel in the charging cable to ensure the lifespan and safety of the charging cable.

[0008] It is also necessary to provide a home charging station protection box and a car charging device.

[0009] A cable reel protection device includes a cable reel, a reel rotatably disposed inside the cable reel, a drive assembly, and a charging assembly. The charging assembly includes a charging cable, a charging gun, and a conductive slip ring. The charging cable includes an inlet cable and an outlet cable. One end of the inlet cable is connected to the power supply bus of the charging pile, and the other end of the inlet cable is connected to the conductive slip ring.

[0010] The reel has a hollow rotating shaft at its center, through which the reel is rotatably mounted in the winding box. A conductive slip ring is installed at one end of the rotating shaft, and the winding box has a cable outlet. The other end of the cable entering the box is connected to the stator end of the conductive slip ring. The rotor of the conductive slip ring is coaxially and fixedly connected to the rotating shaft of the reel. The rotor end of the conductive slip ring is also electrically connected to one end of the cable exiting the box. The other end of the cable exiting the box passes through the rotating shaft of the reel, is coiled and stored on the reel, and extends out from the cable outlet of the winding box to be electrically connected to the charging gun. The drive assembly is located below the winding box and is connected to the rotating shaft for transmission, so as to drive the reel in the winding box to rotate and take in the cable exiting the box.

[0011] Preferably, the drive assembly includes a drive pulley, a driven pulley, a belt, and a servo motor. The driven pulley is fixedly mounted on the shaft of the winding reel, the drive pulley is fixedly mounted on the servo motor, and the belt connects the two for transmission.

[0012] Preferably, the cable reel protection device further includes a cable length measuring mechanism. This mechanism includes a bracket, a fixed wheel, a movable wheel, a tension spring, a counting component, and a control component. The bracket is fixedly installed at the cable outlet of the cable reel and has a sliding groove. The fixed wheel is rotatably mounted on the bracket via a rotating shaft. The movable wheel is slidably mounted in the sliding groove via a rotating shaft and is located below the fixed wheel. The tension spring is fixedly connected at both ends to the bracket and the movable wheel's rotating shaft, respectively, to form a pressing area between the movable wheel and the fixed wheel. After the cable exits from the cable outlet of the cable reel, it passes through the pressing area formed between the movable wheel and the fixed wheel. The counting component is fixedly installed on the bracket and fixedly connected to the fixed wheel's rotating shaft, so that when the cable is pulled out, it drives the fixed wheel to rotate and records the length using the counting component. The control component is electrically connected to the counting component and a servo motor to control the drive component to reel in an equal length of cable based on the length value recorded by the counting component.

[0013] Preferably, the cable reel is further provided with a cleaning mechanism, which is fixedly installed at the cable outlet of the cable reel and located on the outside of the cable reel, so as to clean the surface of the charging cable when pulling out or rewinding the charging cable.

[0014] Preferably, the cleaning mechanism is a rectangular slot, inside which a brush cleaning layer and a sponge cleaning layer are arranged in sequence to clean the surface when the box exit line passes through.

[0015] A home charging station protection box includes a protective box for housing the charging components of the home charging station and the aforementioned cable reel protection device. The protective box includes a box body and a door connected to the box body by a hinge. The cable reel protection device is fixedly installed on the door. By opening and locking the door, the charging components and the cable reel protection device can be protected.

[0016] Preferably, the door of the box is also equipped with a lock, the top of the box is also equipped with a waterproof cover, and the inner side wall of the box is also equipped with a charging gun hook for easy storage of the charging gun.

[0017] Preferably, the protective box further includes a column; the column has a hollow structure, one end of which is fixedly installed at the bottom of the protective box, and the other end is fixed to the ground or base, so as to support the protective box and accommodate the power supply busbar to pass through.

[0018] Preferably, the protective box further includes a wall-mounted bracket; the wall-mounted bracket is fixedly installed on the back of the protective box for wall mounting of the protective box.

[0019] An automotive charging device includes a protective box, a charging assembly, and the aforementioned cable reel protection device. The protective box includes a box body and a door connected to the box body by a hinge. The cable reel protection device is fixedly installed on the door. The charging assembly is housed inside the box body. The charging assembly and the cable reel protection device are protected by opening and closing the door.

[0020] The aforementioned cable reel protection device, home charging pile protection box, and car charging device include a cable reel, a reel rotatably disposed inside the cable reel, a drive assembly, and a charging assembly. The charging assembly includes a charging cable, a charging gun, and a conductive slip ring. The charging cable includes an inlet cable and an outlet cable. One end of the inlet cable is connected to the charging pile power supply busbar, and the other end is connected to the conductive slip ring. A hollow rotating shaft is provided at the center of the reel, through which the reel is rotatably mounted in the cable reel. A conductive slip ring is installed at one end of the rotating shaft. The cable reel has an outlet port, and the other end of the inlet cable is connected to the stator end of the conductive slip ring. The rotor of the conductive slip ring is connected to the reel. The rotating shaft of the reel is coaxially fixedly connected, and the rotor end of the conductive slip ring is also electrically connected to one end of the output cable. The other end of the output cable passes through the rotating shaft of the reel, is wound and stored on the reel, and extends out from the cable outlet of the reel box to be electrically connected to the charging gun. The drive component is located below the reel box and is connected to the rotating shaft for transmission, so as to drive the reel in the reel box to rotate and wind up the output cable. This not only effectively stores the charging cable in the protective box, preventing damage caused by long-term exposure, and ensuring and extending the safety and service life of the charging cable, but also realizes the automatic winding function of the charging cable, greatly improving the convenience of charging. Attached Figure Description

[0021] Figure 1 This is an axonometric view of a home charging station protection box.

[0022] Figure 2 This is a schematic diagram of the cable reel protection device.

[0023] Figure 3 This is a schematic diagram of the internal structure of the cable reel.

[0024] Figure 4 This is a schematic diagram of the internal structure of the cable reel section from another perspective.

[0025] Figure 5 This is a schematic diagram of the charging circuit connection.

[0026] Figure 6 This is a schematic diagram of the length measuring mechanism for the box outlet line.

[0027] Figure 7 This is a cross-sectional schematic diagram of the cleaning facility.

[0028] Figure 8This is a schematic diagram of the wiring connection for the conductive slip ring.

[0029] The diagram shows: 10. Home charging station protection box; 11. Protective box; 11. Box body; 111. Waterproof cover; 1111. Box door; 112. Lock; 1121. Charging gun hook; 12. Charging assembly; 13. Charging cable; 131. Inlet cable; 1311. Outlet cable; 1312. Charging gun; 132. Conductive slip ring; 133. Rotor; 1331. Stator; 1332. Cable winding protection device; 14. Cable winding box; 141. Cable winding reel; 142. Drive assembly; 144. Drive pulley; 1441. Driven pulley; 1442. Belt; 1443. Servo motor; 1444. Outlet cable length measuring mechanism; 146. Bracket; 1461. Fixed wheel; 1462. Moving wheel; 1463. Tension spring; 1464. Counting assembly; 1465. Cleaning mechanism; 147. Brush cleaning layer; 1471. Sponge cleaning layer; 1472. Column; 15. Wall-mounted bracket; 16. Detailed Implementation

[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in 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.

[0031] Please refer to Figures 1 to 8 The present invention provides a cable reel protection device 14, including a cable reel 141, a reel 142 rotatably disposed inside the cable reel 141, a drive assembly 144, and a charging assembly 13. The charging assembly 13 includes a charging cable 131, a charging gun 132, and a conductive slip ring 133. The charging cable 131 includes an inlet cable 1311 and an outlet cable 1312. One end of the inlet cable 1311 is connected to the power supply bus of the charging pile, and the other end of the inlet cable 1311 is connected to the conductive slip ring 133.

[0032] A hollow rotating shaft is provided at the center of the reel 142. The reel 142 is rotatably mounted in the winding box 141 through the rotating shaft. A conductive slip ring 133 is installed at one end of the rotating shaft. The winding box 142 is provided with a cable outlet. The other end of the cable inlet 1311 is connected to the stator end of the conductive slip ring 133. The rotor of the conductive slip ring 133 is coaxially and fixedly connected to the rotating shaft of the reel 142. The rotor end of the conductive slip ring 133 is also electrically connected to one end of the cable outlet 1312. The other end of the cable outlet 1312 passes through the rotating shaft of the reel 142, is coiled and stored on the reel 142, and extends out from the cable outlet of the winding box 141 and is electrically connected to the charging gun 132. The drive assembly 144 is located below the winding box and is connected to the rotating shaft for transmission, so as to drive the reel 142 in the winding box 141 to rotate and take in the cable outlet 1312.

[0033] In this embodiment, the cable reel protection device 14 is mainly suitable for places such as home parking lots, garages, and community parking spaces, providing a safe and convenient charging environment for electric vehicles. In actual use, the user only needs to pull the charging cable 131 from the cable reel 141, connect the charging gun 132 to the charging interface of the electric vehicle, and then start the charging station to charge. After charging is complete, the drive assembly 144 is activated, driving the reel 142 to rotate, coiling the cable 1312 back onto the reel 142. This not only simplifies the charging operation and improves charging efficiency, but also effectively avoids damage to the charging cable 131 caused by prolonged exposure, extending the safety and service life of the charging cable 131.

[0034] In this embodiment, the cable reel 141 has a volute-like structure, and the cable spool 142 is rotatably mounted in the cable reel 141 via a pivot. The cable gap of the cable spool 142 is slightly larger than that of the charging cable 131, and the cable reel 141 is slightly larger than the cable spool 142. This allows the cable 1312 to be wound up in a spiral shape, effectively preventing overlap, knotting, or tangling between the cables 1312, and making the cable 1312 neater during winding, thus reducing space occupation. Furthermore, the volute-like cable reel 141 also possesses a certain strength and rigidity, effectively protecting the internal cable spool 142 and charging cable 131 from damage by external forces.

[0035] Furthermore, considering the charging needs of different users, the cable reel protection device 14 in this embodiment can also be equipped with charging cables 131 and charging guns 132 of various specifications. Users can select the appropriate charging cable 131 and charging gun 132 for charging according to the charging interface type and power requirements of the electric vehicle. This not only meets the charging needs of different users but also improves charging compatibility and flexibility.

[0036] The structure of the conductive slip ring 133, as a mature conductive rotary connector, will not be described in detail here. During installation, the rotor portion 1331 of the slip ring is fixedly connected to the hollow shaft of the winding reel 142, allowing it to rotate synchronously with the reel 142. The conductive ring at the rotor end is connected to one end of the outlet cable 1312 via a wire. The other end of the outlet cable 1312 passes through the hollow channel of the winding reel 142 shaft, is coiled and stored in the reel 142, and finally extends from the cable outlet of the winding box 141 and connects to the charging gun 132. The stator portion 1332 of the slip ring is fixedly installed in the winding box 141 (see attached diagram omitted). One end of the inlet cable 1311 is connected to the charging pile power supply busbar, and the other end is connected to the stator end conductive ring, thereby achieving continuous power transmission during rotation and preventing cable tangling.

[0037] Furthermore, the drive assembly 144 includes a drive pulley 1441, a driven pulley 1442, a belt 1443, and a servo motor 1444. The driven pulley 1442 is fixedly mounted on the shaft of the winding reel 142, the drive pulley 1441 is fixedly mounted on the servo motor 1444, and the belt 1443 drives the two together.

[0038] In this embodiment, a servo motor 1444 drives the drive pulley 1441 to rotate, which in turn drives the driven pulley 1442 and the winding reel 142 to rotate synchronously via a belt 1443, thereby achieving automatic winding of the charging cable 131. The servo motor 1444 has the characteristic of precisely controlling the speed and angle of rotation, and can adjust the winding speed of the charging cable 131 according to actual needs, ensuring that the winding process is smooth and orderly.

[0039] Furthermore, the cable reel protection device 14 also includes a cable length measuring mechanism 146. The cable length measuring mechanism 146 includes a bracket 1461, a fixed wheel 1462, a movable wheel 1463, a tension spring 1464, a counting component 1465, and a control component. The bracket 1461 is fixedly installed at the cable outlet of the cable reel 141 and has a sliding groove. The fixed wheel 1462 is rotatably mounted on the bracket 1461 via a rotating shaft. The movable wheel 1463 is slidably mounted in the sliding groove via a rotating shaft and is located below the fixed wheel 1462. The two ends of the tension spring 1464 are respectively fixedly connected to the rotating shafts of the bracket 1461 and the movable wheel 1463, so that the movable wheel 1463 can move... A pressing area is formed between wheel 1463 and fixed wheel 1462. After the cable 1312 exits from the cable outlet of the winding box 141, it passes through the pressing area formed between the moving wheel 1463 and fixed wheel 1462. The counting component 1465 is fixedly installed on the bracket 1461 and fixedly connected to the shaft of the fixed wheel 1462 so that when the cable 1312 is pulled out, the fixed wheel 1462 is driven to rotate and the length is recorded by the counting component 1465. The control component is electrically connected to the counting component 1465 and the servo motor 1444 so as to control the drive component 144 to wind up the cable 1312 of equal length according to the length value recorded by the counting component 1465.

[0040] In this embodiment, the counting component 1465 uses a rotary encoder (Omron E6B2-CWZ6C), which outputs pulse signals by detecting the angular displacement of the fixed wheel 1462 shaft in real time. Combined with the preset wheel circumference, the control component accurately calculates and accumulates the length pulled out by the box cable 1312. The control component uses an embedded microcontroller (such as STM32 series - STM32F407VGT6) or a programmable logic controller (PLC - Siemens S7-1200). (1214C) By comparing the difference between the recovery length fed back by the encoder and the target length in real time, the torque and speed of the servo motor 1444 are dynamically adjusted. During the wire feeding stage, when the operator pulls the wire, the control component releases the torque lock of the servo motor 1444 based on the real-time length value, and the wire output box 1312 drives the fixed wheel 1462 to rotate, while the encoder synchronously records the length data. During the rewinding stage, the control component starts the servo motor 1444 to drive the winding reel 142 to rotate and rewind the wire output box 1312 with the pulled-out length value as the target, and continuously reads the recovery length fed back by the encoder. When the recovery length value is equal to the target pulled-out length, the servo motor 1444 immediately brakes and stops, thereby achieving equal-length wire recovery.

[0041] Furthermore, a cleaning mechanism 147 is also provided on the cable reel 141. The cleaning mechanism 147 is fixedly installed at the cable outlet of the cable reel 141 and located on the outside of the cable reel 141 to clean the surface of the charging cable 131 when it is pulled out or wound up.

[0042] Furthermore, the cleaning mechanism 147 is a rectangular slot, inside which a brush cleaning layer 1471 and a sponge cleaning layer 1472 are arranged in sequence to clean its surface when the outlet line 1312 passes through.

[0043] In this embodiment, a rectangular cleaning slot is provided on the outside of the cable outlet of the cable reel 141. The interior adopts a layered modular design. The front section is a nylon brush layer, which performs reverse scraping to remove particulate matter and forward cleaning of residue when the cable 1312 is pulled out and retrieved, respectively. The rear section is a high-density oleophobic and hydrophilic sponge layer impregnated with isopropyl alcohol, which dissolves oil stains and adsorbs micro dust through constant pressure contact, realizing dry and wet dual-mode deep cleaning and long-term protection with zero intervention during the pulling and retrieving process.

[0044] In another embodiment, the mechanism can also be linked with the device control logic to add a cleaning fluid replenishment mechanism. After the counting component 1465 detects the cable movement signal, the control component synchronously activates the cleaning function. The brush layer achieves basic cleaning by mechanical friction, while driving a low-flow peristaltic pump to inject cleaning fluid into the sponge layer.

[0045] This utility model also provides a home charging pile protection box 10, including a protective box 11 for housing the charging component 13 of the home charging pile and the aforementioned cable reel winding protection device 14. The protective box 11 includes a box body 111 and a box door 112 connected to the box body 111 by a hinge. The cable reel winding protection device 14 is fixedly installed on the box door 112. By opening and closing the box door 112, the charging component 13 and the cable reel winding protection device 14 can be protected.

[0046] Furthermore, a lock 1121 is provided on the door 112, and a waterproof cover 1111 is provided on the top of the box.

[0047] In this embodiment, both the body and door 112 of the protective box 11 are made of stainless steel, which has good rust and corrosion resistance, effectively protecting the charging pile and cable reel from external environmental damage. The hinges on the door 112 are made of high-strength alloy material, which can withstand greater opening and closing forces, ensuring the stability and durability of the door 112. At the same time, the lock 1121 on the door 112 is an electronic lock with password protection and fingerprint recognition functions, which can effectively prevent unauthorized personnel from opening the protective box at will, ensuring the safety of the charging pile and cable reel protection device 14. The waterproof cover 1111 on the top of the box is made of waterproof material, which has excellent waterproof performance, effectively preventing rainwater from entering the charging pile and cable reel through the gaps in the body and door 112, further improving the service life and safety of the equipment.

[0048] Furthermore, a charging gun hook 12 is provided inside the box to facilitate the storage of the charging gun 132.

[0049] In this embodiment, the charging gun hook 12 has a built-in pressure sensor (SICKPBT-CB1X6SG3SE0A2A0Z) as a trigger switch. When the charging gun 132 is suspended on the hook, the trigger switch detects the gravity signal and is electrically connected to the control component, automatically starting the drive component 144 to wind up the charging cable 131.

[0050] In another embodiment, a waterproof physical button is also provided on the inside of the door 112 of the protective box 11. After the user presses the button, a wire rewind command is sent to the control component.

[0051] Furthermore, the protection box also includes a column 15; the column 15 has a hollow structure, one end of which is fixedly installed at the bottom of the protection box 11, and the other end is fixed to the ground or base, in order to support the protection box 11 and accommodate the power supply busbar to pass through.

[0052] In this embodiment, a hollow column 15 is fixedly installed at the bottom of the protective box 11. Its lower end is anchored to the ground base or concrete foundation through a flange, and its upper end is rigidly connected to the bottom plate of the protective box 11 to form an integral support structure. The inner cavity of the column 15 serves as a through channel for the power supply bus. After the bus is connected from the power grid on the foundation, it extends through the inner cavity of the column 15 into the interior of the protective box 11 to provide power to the winding device.

[0053] In another embodiment, the inner wall of the column 15 is covered with a flame-retardant insulating layer (such as ceramicized silicone rubber), and a waterproof sealing joint is provided at the bottom of the cavity to prevent groundwater from seeping in. A heat dissipation hole is reserved at the junction of the top and the bottom plate of the protective box 11 to dissipate the heat of the busbar through air convection. The outer surface of the column 15 is reinforced with impact-resistant ribs and anti-corrosion coating, so that the overall structure has the ability to resist wind load and salt spray corrosion, realizing the integration of stable power supply and physical protection of the equipment.

[0054] Furthermore, the protective box also includes a wall-mounted bracket 16; the wall-mounted bracket 16 is fixedly installed on the back of the protective box 11 for wall mounting of the protective box 11.

[0055] In this embodiment, a wall-mounted bracket 16 is provided on the back of the protective box 11 and is anchored to the wall by expansion bolts; a ventilation interlayer is reserved between the bracket and the back panel of the protective box 11, and a drainage hole (with an insect screen) is opened at the bottom to prevent condensation from accumulating.

[0056] This utility model also provides an automotive charging device, including a protective box 11, a charging component 13, and the aforementioned cable reel protection device 14. The protective box 11 includes a box body 111 and a door 112 connected to the box body 111 by a hinge. The cable reel protection device 14 is fixedly installed on the door 112. The charging component 13 is housed inside the box body 111. By opening and closing the door 112, the charging component 13 and the cable reel protection device 14 are protected.

[0057] In this embodiment, the charging component 13 also includes an overload protection module, a current monitoring module, and a power conversion module. The charging components for different car brands are different and will not be described in detail.

[0058] When this utility model is implemented, when the operator pulls the charging cable 131 outward through the pressing area between the fixed wheel 1462 and the moving wheel 1463, the fixed wheel 1462 rotates, driving the rotary encoder to generate a pulse signal. The control component calculates and accumulates the pulled cable length in real time based on this signal, and at the same time releases the servo motor 1444 from the lock, causing the reel 142 to release the cable 1312. When rewinding, the user can start the servo motor 1444 by hooking the charging gun 132 back onto the hook to trigger the pressure sensor signal, or by pressing the rewind button inside the door 112 to send a command. Then, the control component uses the pulled cable length as a reference to drive the servo motor 1444 to drive the reel 142 to rewind the charging cable 131. When the recovery value is equal to the original pulled length, the servo motor 1444 immediately brakes and stops. During this process, the charging cable 131 simultaneously passes through the cleaning groove at the cable outlet, where the brush layer scrapes off surface particles, and the liquid-soaked sponge layer absorbs and dissolves oil stains. This not only effectively stores the charging cable 131 inside the protective box 11, preventing damage caused by prolonged exposure and ensuring and extending the safety and lifespan of the charging cable 131, but also enables automatic winding of the charging cable 131, greatly improving the convenience of charging. The charging cable 131 can also be cleaned while being wound up.

[0059] The modules or units in the device of this utility model embodiment can be merged, divided, and deleted according to actual needs. The above-disclosed embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this utility model still fall within the scope of this utility model.

Claims

1. A cable reel protection device, characterized in that: The device includes a cable reel, a cable spool rotatably disposed inside the cable reel, a drive assembly, and a charging assembly. The charging assembly includes a charging cable, a charging gun, and a conductive slip ring. The charging cable includes an inlet cable and an outlet cable. One end of the inlet cable is connected to the power supply bus of the charging pile, and the other end of the inlet cable is connected to the conductive slip ring. The reel has a hollow rotating shaft at its center, through which the reel is rotatably mounted in the winding box. A conductive slip ring is installed at one end of the rotating shaft, and the winding box has a cable outlet. The other end of the cable entering the box is connected to the stator end of the conductive slip ring. The rotor of the conductive slip ring is coaxially and fixedly connected to the rotating shaft of the reel. The rotor end of the conductive slip ring is also electrically connected to one end of the cable exiting the box. The other end of the cable exiting the box passes through the rotating shaft of the reel, is coiled and stored on the reel, and extends out from the cable outlet of the winding box to be electrically connected to the charging gun. The drive assembly is located below the winding box and is connected to the rotating shaft for transmission, so as to drive the reel in the winding box to rotate and take in the cable exiting the box.

2. The cable reel winding protection device according to claim 1, characterized in that: The drive assembly includes a drive pulley, a driven pulley, a belt, and a servo motor. The driven pulley is fixedly mounted on the shaft of the winding reel, the drive pulley is fixedly mounted on the servo motor, and the belt connects the two for transmission.

3. The cable reel winding protection device according to claim 2, characterized in that: The cable reel protection device also includes a cable length measuring mechanism. This mechanism comprises a bracket, a fixed wheel, a movable wheel, a tension spring, a counting component, and a control component. The bracket is fixedly installed at the cable outlet of the cable reel and has a sliding groove. The fixed wheel is rotatably mounted on the bracket via a rotating shaft. The movable wheel is slidably mounted in the sliding groove via a rotating shaft and is located below the fixed wheel. The tension spring is fixedly connected at both ends to the bracket and the movable wheel's rotating shaft, respectively, to form a pressing area between the movable wheel and the fixed wheel. After the cable exits from the cable outlet of the cable reel, it passes through the pressing area formed between the movable wheel and the fixed wheel. The counting component is fixedly installed on the bracket and fixedly connected to the fixed wheel's rotating shaft, so that when the cable is pulled out, it drives the fixed wheel to rotate and records the length using the counting component. The control component is electrically connected to the counting component and a servo motor to control the drive component to reel in an equal length of cable based on the length value recorded by the counting component.

4. The cable reel winding protection device according to claim 1, characterized in that: The cable reel is also equipped with a cleaning mechanism, which is fixedly installed at the cable outlet of the cable reel and located on the outside of the cable reel, so as to clean the surface of the charging cable when pulling out or rewinding the charging cable.

5. The cable reel winding protection device according to claim 4, characterized in that: The cleaning mechanism is a rectangular slot, inside which a brush cleaning layer and a sponge cleaning layer are arranged in sequence to clean the surface when the box exit line passes through.

6. A home charging station protection box, characterized in that: The invention includes a protective box for housing the charging components of a home charging station and a cable reel protection device as described in claim 1. The protective box includes a box body and a door connected to the box body by a hinge. The cable reel protection device is fixedly installed on the door. By opening and locking the door, the charging components and the cable reel protection device are protected.

7. The home charging pile protection box according to claim 6, characterized in that: The door is also equipped with a lock, the top of the box is also equipped with a waterproof cover, and the inner side wall of the box is also equipped with a charging gun hook for easy storage of the charging gun.

8. The home charging pile protection box according to any one of claims 6 to 7, characterized in that: The protective box also includes a column; the column has a hollow structure, one end of which is fixedly installed at the bottom of the protective box, and the other end is fixed to the ground or base, so as to support the protective box and accommodate the power supply busbar to pass through.

9. The home charging pile protection box according to any one of claims 6 to 7, characterized in that: The protective box also includes a wall-mounted bracket; the wall-mounted bracket is fixedly installed on the back of the protective box for wall mounting.

10. A car charging device, characterized in that: The device includes a protective box, a charging assembly, and a cable reel protection device as described in claim 1. The protective box includes a box body and a door connected to the box body by a hinge. The cable reel protection device is fixedly installed on the door. The charging assembly is housed inside the box body. The charging assembly and the cable reel protection device are protected by opening and closing the door.

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