Home charging station protection box and car charging device with cable retraction function

Abstract

This utility model relates to the field of charging pile technology, specifically a protective box for a home charging pile and a car charging device with a cable winding function; it includes a protective box for housing the charging components of a home charging pile, a charging cable, a charging gun, and a charging cable winding device. The protective box contains the charging cable, the charging gun, and the charging cable winding device, and is equipped with a box door; the charging cable is divided into 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 is connected to the stator end of the conductive slip ring inside the winding box; the winding box is fixed inside the protective box, and a spool is installed inside it through a bearing. The conductive slip ring rotor is coaxially fixedly connected to the spool and electrically connected to one end of the outlet cable; the outlet cable is wound on the spool, and the other end extends from the outlet of the winding box and connects to the charging gun; a drive component fixed on the winding box drives the spool to rotate and wind up the outlet cable; this design protects the cable and extends its lifespan, while also achieving automatic winding and improving convenience.

Description

Technical Field

[0001] This utility model relates to the field of charging pile technology, specifically to a home charging pile protection box with cable winding function 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 very inconvenient to use. Moreover, the coiled charging cable is usually directly exposed to the outside, making it susceptible to external environmental factors, such as malicious damage. Some charging stations installed outdoors also subject the charging cable to prolonged exposure to sun and rain, which can easily lead to damage or aging of the charging cable's outer sheath, thereby affecting the lifespan and safety of the charging cable. Utility Model Content

[0005] In view of this, it is necessary to provide a home charging station protection box with a cable winding function to match existing wall-mounted or column-mounted home charging stations, so as to wind up and protect the charging cable, thereby ensuring the service life and safety of the charging cable.

[0006] It is also necessary to provide a car charging device.

[0007] A protective box for a home charging station with a cable winding function includes a protective box for housing the charging components of the home charging station and a charging cable winding device. The charging cable winding device is located inside the protective box, and the protective box has a door. Opening and locking the door protects the charging components and the charging cable winding device. The charging components of the home charging station include a charging cable and a charging gun. The charging cable includes an inlet cable and an outlet cable. One end of the inlet cable is connected to the charging station's power supply busbar, and the other end of the inlet cable is electrically connected to the charging cable winding device.

[0008] The charging cable winding device includes a winding box fixedly installed inside a protective box. A spool is rotatably mounted inside the winding box via bearings. A conductive slip ring is installed at one end of the spool. 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 spool. The rotor end of the conductive slip ring is also electrically connected to one end of the cable exiting the box. The cable exiting the box is wound onto the spool. The other end of the cable exiting the box extends from the cable outlet of the winding box and is electrically connected to the charging gun. A drive assembly is also fixedly installed on the winding box. This drive assembly is connected to the spool to drive the spool to rotate and wind up the cable exiting the box.

[0009] Preferably, the protective box includes a box body and a door connected to the box body by a hinge, the door is also provided with a lock, and the top of the box body is also provided with a waterproof cover.

[0010] Preferably, a charging gun hook is also provided on the side wall inside the box to facilitate the storage of the charging gun.

[0011] Preferably, the charging cable winding device further includes a cable guiding mechanism, which includes a drive pulley, a driven pulley, a belt, a threaded rod, a guide rod, and a cable guide rod. The threaded rod is rotatably mounted inside the winding box via bearings, and the axis of the threaded rod is parallel to the axis of the spool. The guide rod is fixedly mounted inside the winding box, and the axes of the guide rod and the threaded rod are parallel to each other and coplanar. The cable guide rod has a threaded hole and a through hole. The cable guide rod slidably passes through the through hole onto the guide rod and is connected to the threaded rod through the threaded hole. The driven pulley is fixedly mounted on the threaded rod and rotates synchronously with the threaded rod. The drive pulley is fixedly mounted on the spool. The upper part rotates synchronously with the spool. The belt is wound around the drive pulley and the driven pulley to form a transmission connection. When the drive assembly drives the spool to rotate, the drive pulley rotates with the spool, and then drives the driven pulley and the threaded rod to rotate through the belt, so that the cable guide rod moves axially along the guide rod. The cable outlet is a rectangular slot opened on the take-up box. The rectangular slot is parallel to the spool and the length of the rectangular slot is greater than the maximum unidirectional stroke of the cable guide rod. The cable guide rod is also provided with a guide ring. The cable exiting the box passes through the guide ring and extends out from the cable outlet, so as to drive the cable exiting the box to move when the cable guide rod moves along the guide rod, thereby realizing the winding and sorting of the cable exiting the box.

[0012] Preferably, the charging cable winding device further includes a cable length measuring mechanism. The cable length measuring 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 on the cable guide rod 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 two ends of the tension spring are fixedly connected to the bracket and the rotating shaft of the movable wheel, respectively, so that a pressing area is formed between the movable wheel and the fixed wheel. After the cable passes through the cable threading ring, 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 rotating shaft of the fixed wheel, so that when the cable is pulled out, it drives the fixed wheel to rotate and records the length through the counting component. The control component is electrically connected to the counting component and the driving component to control the driving component to wind up the cable of equal length according to the length value recorded by the counting component.

[0013] Preferably, the winding box is further provided with a cleaning mechanism, which is fixedly installed on the cable outlet and located on the outside of the winding box, so as to clean the surface of the charging cable when pulling out or winding 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] Preferably, the home charging pile protection box with cable retraction function also includes a column; the column has a hollow structure, one end of which is fixedly installed at the bottom of the protection box, and the other end is fixed to the ground or base, so as to support the protection box and accommodate the power supply busbar to pass through.

[0016] Preferably, the home charging station protection box with cable retraction function further includes a wall-mounted bracket; the wall-mounted bracket is fixedly installed on the back of the protection box for wall mounting of the protection box.

[0017] A car charging device includes a protective box, a charging component, and a charging cable rewinding device; wherein the charging component and the charging cable rewinding device are disposed inside the protective box, and the protective box has a door, which is opened and locked to protect the charging component and the charging cable rewinding device.

[0018] The charging assembly includes a charging cable and a charging gun. 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 is electrically connected to a charging cable winding device. The charging cable winding device includes a winding box fixedly installed inside a protective box. A spool is rotatably mounted inside the winding box via bearings. A conductive slip ring is installed at one end of the spool. The winding box has an outlet. 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 coaxially and fixedly connected to the spool. The rotor end of the conductive slip ring is also electrically connected to one end of the outlet cable. The outlet cable is wound on the spool. The other end of the outlet cable extends from the outlet of the winding box and is electrically connected to the charging gun. A drive assembly is also fixedly installed on the winding box. This drive assembly is connected to the spool to drive the spool to rotate and wind up the outlet cable.

[0019] The aforementioned home charging pile protection box and car charging device with cable winding function include a protective box for housing the charging components of the home charging pile, a charging cable, a charging gun, and a charging cable winding device; wherein, the charging cable, charging gun, and charging cable winding device are disposed inside the protective box, and the protective box has a door; 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 bus, and the other end of the inlet cable is electrically connected to the charging cable winding device; the charging cable winding device includes a winding box fixedly installed inside the protective box, a spool is rotatably mounted inside the winding box via bearings, a conductive slip ring is installed at one end of the spool, the winding box has an outlet cable, and the other end of the inlet cable is connected to... The stator end of the conductive slip ring is connected to the conductive slip ring, and the rotor of the conductive slip ring is coaxially and fixedly connected to the spool. The rotor end of the conductive slip ring is also electrically connected to one end of the output cable. The output cable is wound around the spool. The other end of the output cable extends from the cable outlet of the winding box and is electrically connected to the charging gun. A drive assembly is also fixedly installed on the winding box. The drive assembly is connected to the spool to drive the spool 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

[0020] Figure 1 This is an axonometric view of a home charging station protection box with cable retraction function.

[0021] Figure 2 This is a front view of a home charging station protection box with cable retraction function.

[0022] Figure 3 This is a connection diagram for the charging cable.

[0023] Figure 4 This is a schematic diagram of a charging cable winding device.

[0024] Figure 5 This is a schematic diagram of the sorting mechanism for the box output line.

[0025] Figure 6 This is a schematic diagram of the moving rod for the box outlet line.

[0026] Figure 7 This is a schematic diagram of the counting mechanism on the box outlet line.

[0027] Figure 8 This is a cross-sectional schematic diagram of the cleaning facility.

[0028] Figure 9 This is a schematic diagram of the wiring for a conductive slip ring.

[0029] The diagram shows: a home charging station protection box 10 with cable winding function, a protective box 11, a box body 111, a waterproof cover 1111, a box door 112, a lock 1121, a charging gun hook 12, a charging assembly 13, an overload protection assembly 131, a charging cable 132, an inlet cable 1321, an outlet cable 1322, a charging gun 133, a charging cable winding device 14, a winding box 141, a spool 142, a conductive slip ring 143, a rotor section 1431, a stator section 1432, a drive assembly 144, and a cable guiding mechanism. 145. Drive pulley 1451. Driven pulley 1452. Belt 1453. Threaded rod 1454. Guide rod 1455. Cable guide rod 1456. Threaded hole 14561. Through hole 14562. Guide ring 14563. Outlet cable length measuring mechanism 146. Bracket 1461. Fixed wheel 1462. Moving wheel 1463. Tension spring 1464. Counting component 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 9 This utility model provides a protective box 10 for a home charging pile with a cable winding function, including a protective box 11 for housing the charging component 13 of the home charging pile and a charging cable winding device 14; wherein, the charging cable winding device 14 is disposed inside the protective box 11, and the protective box 11 has a box door 112, and the charging component 13 and the charging cable winding device 14 are protected by opening and closing the box door 112; the charging component 13 of the home charging pile includes a charging cable 132 and a charging gun 133, the charging cable 132 includes an inlet cable 1321 and an outlet cable 1322, one end of the inlet cable 1321 is connected to the power supply bus of the charging pile, and the other end of the inlet cable 1321 is electrically connected to the charging cable winding device 14;

[0032] The charging cable winding device 14 includes a winding box 141 fixedly installed inside the protective box 11. A spool 142 is rotatably mounted inside the winding box 141 via bearings. A conductive slip ring 143 is installed at one end of the spool 142. The winding box 141 has a cable outlet. The other end of the cable entering the box 1321 is connected to the stator end of the conductive slip ring 143. The rotor of the conductive slip ring 143 is coaxially and fixedly connected to the spool 142. The rotor end of the conductive slip ring 143 is also electrically connected to one end of the cable exiting the box 1322. The cable exiting the box 1322 is wound around the spool 142. The other end of the cable exiting the box 1322 extends out from the cable outlet of the winding box 141 and is electrically connected to the charging gun 133. A drive assembly 144 is also fixedly installed on the winding box 141. The drive assembly 144 is connected to the spool 142 for transmission, so as to drive the spool 142 to rotate and wind up the cable exiting the box 1322.

[0033] In this embodiment, the home charging pile protection box 10 with cable winding function is mainly suitable for home parking lots, garages, community parking spaces, and other places, providing a safe and convenient charging environment for electric vehicles. In actual use, the user only needs to open the protective box 11, take the charging gun 133 out of the protective box 11, connect the charging gun 133 to the charging interface of the electric vehicle, and then start the charging pile for charging. After charging is complete, the charging gun 133 is placed on the charging gun hook 12 inside the protective box 11, and the charging cable winding device 14 is activated. The drive component 144 drives the spool 142 to rotate, orderly winding the cable 1322 out of the box onto the spool 142. This not only simplifies the charging operation and improves charging efficiency, but also effectively avoids damage to the charging cable 132 caused by prolonged exposure, extending the safety and service life of the charging cable.

[0034] The conductive slip ring 143 is now widely used as a mature technology, and its structure will not be described in detail. During installation, the rotor part 1431 of the conductive slip ring 143 is fixedly connected to the shaft of the spool 142, so that it can rotate synchronously with the spool 142. The rotor end of the conductive slip ring 143 is connected to one end of the output cable 1322. The other end of the output cable 1322 passes through the spool 142, is coiled and stored on the spool 142, and extends out from the cable outlet of the winding box 141 to connect to the charging gun 133. The stator part 1432 of the conductive slip ring 143 is fixed on the winding box 141 (figure omitted) and remains stationary. One end of the input cable 1321 is connected to the power supply bus of the charging pile, and the other end is connected to the stator end of the conductive slip ring 143 through the overload protection component 131, thereby realizing continuous power transmission during rotation and avoiding cable tangling.

[0035] Furthermore, the protective box 11 includes a box body 111 and a door 112 connected to the box body 111 by a hinge, and a lock 1121 is also provided on the door 112.

[0036] Furthermore, a waterproof cover 1111 is provided on the top of the housing 111 to prevent the charging pile and cable retraction device from being corroded by rainwater.

[0037] In this embodiment, both the body 111 and the 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 retractor 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 functions such as password protection and fingerprint recognition, which can effectively prevent unauthorized personnel from opening the protective box 10 at will, ensuring the safety of the charging pile and cable retractor. The waterproof cover 1111 on the top of the body 111 is made of waterproof material, which has excellent waterproof performance, effectively preventing rainwater from entering the charging pile and cable retractor through the gaps between the body 111 and the door 112, further improving the service life and safety of the equipment.

[0038] Furthermore, a charging gun hook 12 is provided inside the housing 111 to facilitate the storage of the charging gun 133.

[0039] In this embodiment, the charging gun hook 12 has a built-in pressure sensor (SICK PBT-CB1X6SG3SE0A2A0Z) as a trigger switch. When the charging gun 133 is suspended on the hook, the trigger switch detects the gravity signal and automatically starts the drive assembly 144 to wind up the charging cable 132.

[0040] 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.

[0041] Furthermore, the charging cable winding device 14 also includes a cable guiding mechanism 145, which includes a drive pulley 1451, a driven pulley 1452, a belt 1453, a threaded rod 1454, a guide rod 1455, and a cable guide rod 1456. The threaded rod 1454 is rotatably mounted in the winding box 141 via bearings, and the axis of the threaded rod 1454 is parallel to the axis of the spool 142. The guide rod 1455 is fixedly mounted in the winding box 141. The axes of the guide rod 1455 and the threaded rod 1454 are parallel and coplanar. The cable guide rod 1456 is provided with a threaded hole 14561 and a through hole 14562. The cable guide rod 1456 is slidably inserted into the guide rod 1455 through the through hole 14562 and is connected to the threaded rod 1454 through the threaded hole 14561. The driven pulley 1452 is fixedly installed on the threaded rod 1454 and rotates synchronously with the threaded rod 1454, driving the pulley 1455. 1. Fixedly installed on the spool 142, rotating synchronously with the spool 142. A belt 1453 is wound around the drive pulley 1451 and the driven pulley 1452 to form a transmission connection. When the drive assembly 144 drives the spool 142 to rotate, the drive pulley 1451 rotates with the spool 142, and then drives the driven pulley 1452 and the threaded rod 1454 to rotate through the belt 1453, causing the cable guide rod 1456 to move axially along the guide rod 1455; the cable outlet is a... A rectangular slot is formed on the take-up box 141, which is parallel to the spool 142. The length of the rectangular slot is greater than the maximum unidirectional stroke of the cable guide rod 1456. The cable guide rod 1456 is also provided with a guide ring 14563. The exit cable 1322 passes through the guide ring 14563 and extends out from the exit port, so that when the cable guide rod 1456 moves along the guide rod 1455, it drives the exit cable 1322 to move, thereby realizing the take-up and sorting of the exit cable 1322.

[0042] In this embodiment, the drive assembly 144 is a servo motor, which is rigidly connected to one end of the bobbin 142 via a coupling, a reducer, or directly coaxially, to drive the bobbin 142 to rotate and wind up the box wire 1322. Simultaneously, the drive pulley 1451 fixed on the bobbin 142 rotates with the bobbin, driving the driven pulley 1452 fixed to the threaded rod 1454 via a belt 1453, forcing the threaded rod 1454 to rotate synchronously. The drive assembly 1454 is mounted on the threaded rod 1454. The cable guide rod 1456, which mates with the guide rod 1455 and has a guide ring 14563, converts the rotation of the threaded rod 1454 into its own axial linear motion because its threaded hole 14561 meshes with the threaded rod 1454 and its through hole 14562 is axially constrained by the guide rod 1455. The charging cable 132 passes through the guide ring 14563 on the cable guide rod 1456 and extends out from the outlet, so that the charging cable 132 moves in an orderly manner as the cable guide rod 1456 moves. The servo motor can precisely control the rotation speed of the spool 142. Furthermore, by adjusting the diameter ratio of the drive pulley 1451 and the driven pulley 1452, as well as the thread lead of the threaded rod 1454, a fixed transmission chain is formed. This ensures that for every rotation of the spool 142, the cable guide rod 1456 moves precisely by a fixed distance determined by the transmission ratio. As a result, each turn or loop of charging cable 132 can be precisely and equidistantly arranged side by side on the spool 142, effectively preventing cable overlap, knots, or cross-entanglement, and adapting to cables of different thicknesses.

[0043] Furthermore, the charging cable winding 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 mounted on the cable guide rod 1456 and has a sliding groove. The fixed wheel 1462 is rotatably mounted on the bracket 1461 via a pivot. The movable wheel 1463 is slidably mounted in the sliding groove via a pivot and is located below the fixed wheel 1462. The two ends of the tension spring 1464 are respectively fixedly connected to the pivots of the bracket 1461 and the movable wheel 1463, so that... A pressing area is formed between the moving wheel 1463 and the fixed wheel 1462. After the exit line 1322 passes through the threading ring, it passes through the pressing area formed between the moving wheel 1463 and the fixed wheel 1462. The counting component 1465 is fixedly installed on the bracket 1461 and fixedly connected to the rotating shaft of the fixed wheel 1462 so that when the exit line 1322 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 drive component 144 so as to control the drive component 144 to wind up the exit line 1322 of the same length according to the length value recorded by the counting component 1465.

[0044] 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 1322. 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 are dynamically adjusted. When the operator pulls the cable, the cable exit box 1322 drives the fixed wheel 1462 to rotate, and the encoder records the length data synchronously. During the cable release stage, the control component releases the torque lock of the servo motor based on the real-time length value, and at the same time, the linkage sorting mechanism causes the cable guide rod 1456 to move synchronously in the opposite direction along the guide rod 1455, ensuring that the guide ring 14563 dynamically tracks the cable release position. During the rewind stage, the control component starts the servo motor to drive the spool 142 to rotate and rewind the cable with the pull-out length value as the target. At the same time, the belt 1453 and the threaded rod 1454 drive the cable guide rod 1456 to move axially to achieve synchronous cable laying, and continuously reads the recovery length fed back by the rotary encoder. When the recovery length value is equal to the target pull-out length, the servo motor immediately brakes and stops, thereby achieving equal-length cable recovery and uniform and tight cable laying.

[0045] Furthermore, a cleaning mechanism 147 is also provided on the winding box 141. The cleaning mechanism 147 is fixedly installed at the cable outlet and located on the outside of the winding box 141 to clean the surface of the charging cable 132 when the charging cable 132 is pulled out or wound up.

[0046] 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 1322 passes through.

[0047] In this embodiment, a rectangular cleaning slot is provided on the outside of the cable outlet of the rewind box 141. The interior adopts a layered modular design. The front section is a nylon brush layer 1471, which performs reverse scraping to remove particulate matter and forward cleaning of residues when the cable 1322 is pulled out and retracted, respectively. The rear section is a high-density oleophobic and hydrophilic sponge layer 1472 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 rewinding process.

[0048] 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 1471 achieves basic cleaning by mechanical friction, while driving a low-flow peristaltic pump to inject cleaning fluid into the sponge layer 1472.

[0049] Furthermore, the protection box 10 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.

[0050] 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.

[0051] 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.

[0052] Furthermore, the protective box 10 also includes a wall-mounted bracket 16; the wall-mounted bracket 16 is fixedly disposed on the back of the protective box 11 for wall-mounting the protective box 11.

[0053] 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.

[0054] This utility model also provides an automobile charging device, including a protective box 11, a charging component 13, and a charging cable winding device 14; wherein, the charging component 13 and the charging cable winding device 14 are disposed inside the protective box 11, and the protective box 11 has a box door 112, and the charging component 13 and the charging cable winding device 14 are protected by opening and locking the box door 112.

[0055] The charging assembly 13 includes a charging cable 132 and a charging gun 133. The charging cable 132 includes an inlet cable 1321 and an outlet cable 1322. One end of the inlet cable 1321 is connected to the power supply bus of the charging pile, and the other end of the inlet cable 1321 is electrically connected to the charging cable winding device 14. The charging cable winding device 14 includes a winding box 141 fixedly installed inside the protective box 11. A spool 142 is rotatably mounted inside the winding box 141 via a bearing. One end of the spool 142 is equipped with a conductive slip ring 143. The winding box 141 has an outlet cable. The other end of the inlet cable 1321 is connected to the outlet cable 1322. The stator end of the electric slip ring 143 is coaxially and fixedly connected to the rotor of the conductive slip ring 143 and the spool 142. The rotor end of the conductive slip ring 143 is also electrically connected to one end of the output cable 1322. The output cable 1322 is wound on the spool 142. The other end of the output cable 1322 extends out from the cable outlet of the take-up box 141 and is electrically connected to the charging gun 133. A drive assembly 144 is also fixedly installed on the take-up box 141. The drive assembly 144 is connected to the spool 142 for driving the spool 142 to rotate and take up the output cable 1322.

[0056] In this embodiment, the charging component 13 also includes an overload protection module 131, a current monitoring module, and a power conversion module, etc. The charging components corresponding to different car brands are different and will not be described in detail.

[0057] When this utility model is implemented, when the operator pulls the charging cable 132 outward through the pressing area between the fixed wheel 1462 and the moving wheel 1463, the fixed wheel 1462 rotates to drive the rotary encoder to generate a pulse signal. The control component calculates and accumulates the length of the pulled cable in real time based on this signal. At the same time, the resistance of the servo motor is released and the cable guide rod 1456 is driven to slide in the opposite direction along the guide rod 1455, so that the guide ring 14563 dynamically tracks the cable release position. During rewinding, the user can activate the servo motor by hooking the charging gun 133 back onto the hook to trigger the pressure sensor signal, or by pressing the rewind button inside the box door 112 to send a command. The control component then uses the pulled cable length as a reference to drive the servo motor to drive the bobbin 142 to rewind the charging cable 132. Simultaneously, the belt 1453 and threaded rod 1454 mechanism push the cable guide rod 1456 axially to achieve equidistant cable routing. During this process, a rotary encoder continuously monitors the rewind length. When the rewind length equals the original pulled-out length, the servo motor immediately brakes and stops. During this process, the charging cable 132 simultaneously passes through the cleaning groove at the cable outlet, where the brush layer 1471 scrapes off surface particles, and the liquid-impregnated sponge layer 1472 absorbs and dissolves oil stains. This not only effectively stores the charging cable 132 inside the protective box 11, preventing damage caused by prolonged exposure and ensuring and extending the safety and lifespan of the charging cable, but also achieves automatic rewinding of the charging cable 132, greatly improving the convenience of charging. While winding up the charging cable 132, the charging cable 132 can also be cleaned.

[0058] 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 home charging station protection box with cable retraction function, characterized in that: The invention includes a protective box for housing the charging components of a home charging station and a charging cable rewinding device. The charging cable rewinding device is located inside the protective box, and the protective box has a door. By opening and locking the door, the charging components and the charging cable rewinding device are protected. The charging components of the home charging station include a charging cable and a charging gun. 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 station, and the other end of the inlet cable is electrically connected to the charging cable rewinding device. The charging cable winding device includes a winding box fixedly installed inside a protective box. A spool is rotatably mounted inside the winding box via bearings. A conductive slip ring is installed at one end of the spool. 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 spool. The rotor end of the conductive slip ring is also electrically connected to one end of the cable exiting the box. The cable exiting the box is wound onto the spool. The other end of the cable exiting the box extends from the cable outlet of the winding box and is electrically connected to the charging gun. A drive assembly is also fixedly installed on the winding box. This drive assembly is connected to the spool to drive the spool to rotate and wind up the cable exiting the box.

2. The home charging pile protection box with cable winding function according to claim 1, characterized in that: The protective box includes a box body and a door connected to the box body by hinges. The door is also equipped with a lock, and the top of the box body is also equipped with a waterproof cover.

3. The home charging pile protection box with cable retraction function according to claim 2, characterized in that: The inner side wall of the box is also equipped with a charging gun hook for easy storage of the charging gun.

4. The home charging pile protection box with cable retraction function according to claim 1, characterized in that: The charging cable winding device further includes a cable guiding mechanism, which comprises a drive pulley, a driven pulley, a belt, a threaded rod, a guide rod, and a cable guide rod. The threaded rod is rotatably mounted inside the winding box via bearings, and its axis is parallel to the axis of the spool. The guide rod is fixedly mounted inside the winding box, and its axes are parallel and coplanar with those of the threaded rod. The cable guide rod has a threaded hole and a through hole. The cable guide rod slidably passes through the through hole onto the guide rod and is connected to the threaded rod via the threaded hole. The driven pulley is fixedly mounted on the threaded rod and rotates synchronously with it. The drive pulley is fixedly mounted on the spool and rotates synchronously with it. The spool rotates synchronously, and the belt is wound around the drive pulley and the driven pulley to form a transmission connection. When the drive assembly drives the spool to rotate, the drive pulley rotates with the spool, and then drives the driven pulley and the threaded rod to rotate through the belt, so that the cable guide rod moves axially along the guide rod. The cable outlet is a rectangular slot opened on the take-up box. The rectangular slot is parallel to the spool, and the length of the rectangular slot is greater than the maximum unidirectional stroke of the cable guide rod. The cable guide rod is also provided with a guide ring. The cable exiting the box passes through the guide ring and extends out from the cable outlet, so as to drive the cable exiting the box to move when the cable guide rod moves along the guide rod, thereby realizing the winding and sorting of the cable exiting the box.

5. The home charging station protection box with cable retraction function according to claim 4, characterized in that: The charging cable winding device further includes a cable length measuring mechanism, which comprises a bracket, a fixed wheel, a movable wheel, a tension spring, a counting component, and a control component. The bracket is fixedly mounted on the cable guide rod 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 two ends of the tension spring are fixedly connected to the bracket and the rotating shaft of the movable wheel, respectively, so that a pressing area is formed between the movable wheel and the fixed wheel. After the cable passes through the cable threading ring, it passes through the pressing area formed between the movable wheel and the fixed wheel. The counting component is fixedly mounted on the bracket and fixedly connected to the rotating shaft of the fixed wheel, so that when the cable is pulled out, it drives the fixed wheel to rotate and records the length through the counting component. The control component is electrically connected to the counting component and the driving component to control the driving component to wind up the cable of equal length according to the length value recorded by the counting component.

6. The home charging pile protection box with cable retraction function according to claim 4, characterized in that: The winding box is also equipped with a cleaning mechanism, which is fixedly installed on the cable outlet and located on the outside of the winding box, so as to clean the surface of the charging cable when pulling out or winding it up.

7. The home charging pile protection box with cable retraction function according to claim 6, 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.

8. The home charging pile protection box with cable retraction function according to any one of claims 1 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 with cable retraction function according to any one of claims 1 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: It includes a protective box, a charging component, and a charging cable rewinding device; wherein the charging component and the charging cable rewinding device are installed inside the protective box, and the protective box has a door, which can be opened and locked to protect the charging component and the charging cable rewinding device. The charging assembly includes a charging cable and a charging gun. 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 is electrically connected to a charging cable winding device. The charging cable winding device includes a winding box fixedly installed inside a protective box. A spool is rotatably mounted inside the winding box via bearings. A conductive slip ring is installed at one end of the spool. The winding box has an outlet. 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 coaxially and fixedly connected to the spool. The rotor end of the conductive slip ring is also electrically connected to one end of the outlet cable. The outlet cable is wound on the spool. The other end of the outlet cable extends from the outlet of the winding box and is electrically connected to the charging gun. A drive assembly is also fixedly installed on the winding box. This drive assembly is connected to the spool to drive the spool to rotate and wind up the outlet cable.

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