Electric drive built-in charging wire winding device

Abstract

The utility model discloses an electrically-driven built-in charging wire winding device which comprises a wire roller body, and the wire roller body comprises a middle shaft, a wire winding roller and a wire winding roller. The left side supporting plate and the right side supporting plate are symmetrically arranged on the left side and the right side of the middle shaft; the roller and the middle shaft are coaxially arranged, and the roller is rotationally connected with the inner side end faces of the two side supporting plates; the first sleeve is arranged in the roller and fixedly sleeves the outer side of the middle shaft, and a first binding post is arranged on the right side end face; the second sleeve is arranged in the roller, movably sleeves the outer side of the first sleeve and is fixedly connected with the roller, and a second binding post electrically connected with the first binding post is arranged on the left side end face of the second sleeve; the motor is arranged in the roller, fixedly connected with the right side supporting plate, electrically connected with the first binding post and used for driving the roller to rotate through a transmission mechanism; according to the utility model, the motor is arranged in the roller, so that the device is more compact in structure; meanwhile, stable transmission of electric power in the rotating process of the roller is achieved; in addition, the cable storage efficiency and the control flexibility are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle charging devices, and particularly to a charging cable winding device with an in-built electric drive. Background Art

[0002] With the popularization of electric vehicles and the increasing charging demand, the construction of charging infrastructure has become increasingly important. As a key component in the charging process, the storage and release operations of the charging cable directly affect the convenience and safety of charging. Traditional charging cable storage methods mostly rely on manual winding, which is not only cumbersome to operate, but also easily leads to wear and knotting of the charging cable, and even affects the charging efficiency and service life.

[0003] Although existing automatic winding devices have solved the problem of manual winding to a certain extent, they often have deficiencies such as complex structures, large volumes, and high costs. Most of these devices use external motors for drive, which not only occupy extra space, but are also easily interfered by the external environment, resulting in a shortened service life. In addition, some devices also have certain limitations in power transmission and cable control, and cannot ensure stable power transmission during cable rotation and orderly storage of the cable. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a charging cable winding device with an in-built electric drive for the problems existing in the prior art. The motor is built inside the roller, making the device structure more compact; at the same time, stable power transmission during roller rotation is achieved; in addition, the storage efficiency of the cable and the flexibility of control are also improved.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A charging cable winding device with an in-built electric drive includes a wire roller body, and the wire roller body includes: a central shaft for providing rotational support; a left support plate and a right support plate symmetrically arranged on the left and right sides of the central shaft; a roller coaxially arranged with the central shaft and rotatably connected to the inner end faces of the two side support plates for winding and storing the charging cable; a first sleeve arranged inside the roller and fixedly sleeved outside the central shaft, with a first terminal on the right end face of the first sleeve for connecting to a power source; a second sleeve arranged inside the roller, movably sleeved outside the first sleeve and fixedly connected to the roller, with a second terminal electrically connected to the first terminal on the left end face of the second sleeve for electrically connecting to the tail end of the charging cable; a motor arranged inside the roller and fixedly connected to the right support plate, the motor being electrically connected to the first terminal and driving the roller to rotate through a transmission mechanism.

[0007] The inner end face of the left support plate is fixedly provided with a first support ring. The outer ring of a first bearing is connected to the inner peripheral wall of the first support ring, and the inner ring of the first bearing is connected to the left end of the roller, realizing the rotational connection between the roller and the left support plate.

[0008] The inner end face of the right support plate is fixedly provided with a second support ring. The inner ring of a second bearing is connected to the outer peripheral wall of the second support ring, and the outer ring of the second bearing is connected to the right end of the roller; realizing the rotational connection between the roller and the right support plate.

[0009] The left end of the roller is connected with a left end plate that rotates synchronously with it. The inner ring of the first bearing is connected to the left end plate. The left end plate is provided with a first inner hole, and the left end of the second sleeve passes through the first inner hole and is fixed to it; the right end of the roller is provided with a right end plate, which is fixed to the second support ring. The right end plate is provided with a second inner hole, and the right end of the second sleeve passes through the second inner hole and has a clearance fit with it; the motor is fixed to the right end plate.

[0010] The outer peripheral wall of the left end of the roller is provided with a cable clamp and a wire groove, and the left end plate is provided with a wire passing hole communicating with the wire groove.

[0011] An electric contact ring is provided on the outer side of the first sleeve. The electric contact ring is electrically connected to the first terminal. A brush is provided on the inner side of the second sleeve. The brush is in sliding contact with the electric contact ring, and the brush is electrically connected to the second terminal.

[0012] The transmission mechanism includes an internal gear ring and a driving gear. The internal gear is coaxial with the roller and is fixed to its inner peripheral wall. The driving gear is fixed to the output shaft of the motor and meshes with the internal gear ring.

[0013] The wire roller body includes a plurality of wire guide rollers. The two ends of the wire guide rollers are respectively rotationally connected to the left support plate and the right support plate. The plurality of wire guide rollers are all parallel to the central axis and are circumferentially distributed on the outer side of the roller.

[0014] The outer peripheral wall of the roller is provided with a spiral plate. The outer peripheral wall of the roller and the spiral plate form a spiral groove for guiding the charging cable to be spirally wound around the outer peripheral wall of the roller.

[0015] The outer peripheral wall of the left end of the roller is provided with an installation groove. A first pressure sensor is arranged in the installation groove. The first pressure sensor is provided with a first compression spring piece for contacting a predetermined part of the charging cable to limit the maximum release amount of the charging cable.

[0016] The device includes a wire seat, which is fixedly opposed to the right support plate. The wire seat is provided with a wire through groove for guiding the front end of the charging cable when it is released. The wire seat is provided with a second pressure sensor, and the second pressure sensor is provided with a second compression spring piece for contacting the charging gun at the front end of the charging cable to limit the maximum retraction amount of the charging cable.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. By placing the motor inside the roller, the space inside the roller is fully utilized, avoiding the additional space occupied by an external motor, making the device structure more compact and facilitating installation and use.

[0019] 2. With the motor placed inside the roller, to a certain extent, the motor is protected from external environmental interference and damage, such as dust and moisture, thus extending the service life of the motor.

[0020] 3. The design of the built-in motor makes the appearance of the device more concise, enhancing the overall aesthetics.

[0021] 4. The function of automatically storing and releasing the charging cable is realized. There is no need to manually wind the cable. By controlling the built-in motor, the storage and release of the cable can be achieved, improving the operation convenience.

[0022] 5. The method of automatically storing and releasing the cable can effectively protect the charging cable from damage. When the cable is stored, it will be evenly wound on the roller, avoiding wear and knotting caused by random placement.

[0023] 6. Through the automatic control and electrical connection design, the device can maintain a stable connection between the cable and the power supply when storing and releasing the cable, improving the use safety and avoiding the electric shock risk brought by manual power-on operation.

[0024] 7. Through the design of the electric contact ring and the carbon brush, the problem of how to continuously transmit power during the rotation of the roller is solved, enabling the charging cable to always maintain a connection with the power supply when being stored or released. There is no need to worry that the rotation of the cable will affect the power transmission, making the use of the device more convenient and reliable.

[0025] 8. The spiral plate provided on the outer peripheral wall of the roller and the roller form a spiral groove to guide the charging cable to be spirally wound, improving the cable storage efficiency.

[0026] 9. By setting the first pressure sensor and the second pressure sensor, the maximum release amount and the maximum retraction amount of the charging cable are respectively limited, increasing the flexibility and safety of use. Description of the Drawings

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 The overall structure diagram of the charging cable winding device in an embodiment of the present application;

[0029] Figure 2 The front view of the wire roller body in an embodiment of the present application;

[0030] Figure 3 For the present application Figure 2 The A-A cross-sectional view;

[0031] Figure 4 The structure diagram of a part of the wire roller body that can rotate around the central axis in an embodiment of the present application;

[0032] Figure 5 For the present application Figure 4 The structure diagram from another angle;

[0033] Figure 6 The structure diagram of a part of the wire roller body that cannot rotate around the central axis in an embodiment of the present application;

[0034] In the figure: 1. Central axis; 2. Left support plate; 3. Right support plate; 4. Roller; 5. Charging cable; 6. First sleeve; 7. First terminal; 8. Second sleeve; 9. Second terminal; 10. Motor; 11. First support ring; 12. First bearing; 13. Second support ring; 14. Second bearing; 15. Left end plate; 16. Right end plate; 17. Driving gear; 18. Internal gear ring; 19. Wire roller; 20. Spiral plate; 21. First pressure sensor; 22. Wire seat; 23. Wire through groove; 24. Second pressure sensor; 25. Charging gun; 26. Cable clamp; 27. Wire passing groove; 28. Wire passing hole. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0037] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] As Figures 1 to 6 shown, an electric drive built-in charging cable winding device includes a wire roller body, and the wire roller body includes: a central shaft 1 for providing rotational support; a left support plate 2 and a right support plate 3 symmetrically arranged on the left and right sides of the central shaft 1; a roller 4 coaxially arranged with the central shaft 1 and rotatably connected to the inner end faces of the two side support plates for winding and storing a charging cable 5; a first sleeve 6 provided inside the roller 4 and fixedly sleeved outside the central shaft 1, and a first terminal 7 is provided on the right end face of the first sleeve 6 for connecting to a power source; a second sleeve 8 provided inside the roller 4 and movably sleeved outside the first sleeve 6 and fixedly connected to the roller 4, and a second terminal 9 electrically connected to the first terminal 7 is provided on the left end face of the second sleeve 8 for electrically connecting to the tail end of the charging cable 5; a motor 10 provided inside the roller 4 and fixedly connected to the right support plate 3, and the motor 10 is electrically connected to the first terminal 7 and drives the roller 4 to rotate through a transmission mechanism.

[0040] Specifically, the central axis 1 provides rotational support, while the two side support plates ensure that the roller 4 can rotate stably between them; the roller 4 is used for winding and storing the charging cable 5. When the cable needs to be stored, the motor 10 drives the roller 4 to rotate through the transmission mechanism, so as to wind the cable on the roller. On the contrary, when the cable needs to be released, the motor rotates in the reverse direction, and the roller 4 rotates in the reverse direction accordingly to release the cable.

[0041] The first sleeve 6 is fixed on the central axis 1 and connected to the power supply. The second sleeve 8 is movably sleeved outside the first sleeve and fixedly connected to the roller 4. The second terminal 9 on the second sleeve is electrically connected to the end of the charging cable 5, while the first terminal 7 is connected to the power supply. In this way, when the roller rotates, the cable can maintain an electrical connection with the power supply to achieve power transmission.

[0042] The motor 10 drives the roller 4 to rotate through the transmission mechanism, such as the internal gear ring 18 and the driving gear 17, to ensure that the motor 10 can effectively transmit power to the roller 4 to realize the storage and release of the cable.

[0043] In this embodiment, the motor 10 is built into the interior of the roller 4, making full use of the space inside the roller 4, avoiding the additional space occupied by an external motor, making the structure of the device more compact and facilitating installation and use; in addition, by placing the motor 10 inside the roller 4, to a certain extent, the motor 10 is protected from interference and damage from the external environment, such as dust and moisture, thereby extending the service life of the motor 10; and the appearance of the device is more concise, enhancing the overall aesthetics.

[0044] This device can automatically store and release the charging cable without manually winding the cable. By controlling the built-in motor 10, the storage and release of the cable can be realized, improving the convenience of operation and use.

[0045] By automatically storing and releasing the cable, this device can effectively protect the charging cable from damage. When the cable is stored, it will be evenly wound on the roller 4, avoiding wear and knotting caused by random placement.

[0046] Through the automatic control and electrical connection design, this device can maintain a stable connection between the cable and the power supply when storing and releasing the cable, improving the safety of use. At the same time, it avoids the electric shock risk brought by the user's manual power-on operation.

[0047] In some embodiments, a first support ring 11 is fixedly provided on the inner end face of the left support plate 2. The outer ring of a first bearing 12 is connected to the inner peripheral wall of the first support ring 11, and the inner ring of the first bearing 12 is connected to the left end of the roller 4, realizing the rotational connection between the roller 4 and the left support plate 2. A second support ring 13 is fixedly provided on the inner end face of the right support plate 3. The inner ring of a second bearing 14 is connected to the outer peripheral wall of the second support ring 13, and the outer ring of the second bearing 14 is connected to the right end of the roller 4, realizing the rotational connection between the roller 4 and the right support plate 3.

[0048] Specifically, the inner ring of the first bearing 12 is connected to the left end of the roller 4, realizing the rotational connection between the roller 4 and the left support plate 2. Similarly, the outer ring of the second bearing 14 is connected to the right end of the roller 4, realizing the rotational connection between the roller 4 and the right support plate 3. Through the arrangement of the first support ring 11, the first bearing 12, the second support ring 13, and the second bearing 14, a stable rotational connection is provided for the roller 4, reducing the friction and wear between the roller 4 and the support plate, and ensuring the smoothness and reliability of the roller 4 during rotation.

[0049] In some embodiments, the left end of the roller 4 is connected to a left end plate 15 that rotates synchronously with it. The inner ring of the first bearing 12 is connected to the left end plate 15. The left end plate 15 is provided with a first inner hole, and the left end of the second sleeve 8 passes through the first inner hole and is fixed to it. The right end of the roller 4 is provided with a right end plate 16. The right end plate 16 is fixed to the second support ring 13. The right end plate 16 is provided with a second inner hole, and the right end of the second sleeve 8 passes through the second inner hole and has a clearance fit with it. The motor 10 is fixed to the right end plate 16.

[0050] Specifically, when the roller 4 rotates, the left end plate 15 also rotates at the same speed and in the same direction. The left end plate is rotationally connected to the left support plate 2 through the first bearing 12. The left end plate 15 is provided with a first inner hole, and the left end of the second sleeve 8 passes through this inner hole and is fixed to it. Therefore, the second sleeve 8 rotates synchronously with the left end plate 15. The right end of the second sleeve 8 has a clearance fit with the second inner hole of the right end plate 16, allowing the second sleeve 8 to rotate freely relative to the right end plate 16. The right end plate 16 provides a mounting and fixing position for the motor 10, enabling the motor 10 to be firmly installed inside the roller 4. The motor 10 drives the roller 4 to rotate through gear transmission. Since the left end plate 15 rotates synchronously with the roller 4, the motor 10 actually also drives the left end plate 15 and the second sleeve 8 connected to it to rotate.

[0051] In some embodiments, a cable clamp 26 and a wire groove 27 are provided on the outer peripheral wall of the left end of the roller 4. The left end plate 15 is provided with a wire passing hole 28 that communicates with the wire groove 27.

[0052] Specifically, when the charging cable 5 needs to be stored in the roller 4, its tail end is guided through the wire groove 27 to the wire hole 28, then passes through the wire hole 28 and is connected to the second terminal 9 on the second sleeve 8; when the roller rotates to store or release the cable, the cable clamp 26 can fix the tail end of the cable to prevent it from loosening or falling off during the storage or release process; through the design of the cable clamp 26, the wire groove 27, and the wire hole 28, a stable and orderly connection path is provided for the charging cable 5 to ensure the stability of power transmission.

[0053] In some embodiments, an electric contact ring is provided on the outer side of the first sleeve 6, the electric contact ring is electrically connected to the first terminal 7, a brush is provided on the inner side of the second sleeve 8, the brush is in sliding contact with the electric contact ring, and the brush is electrically connected to the second terminal 9.

[0054] Specifically, when the roller 4 rotates, since the first sleeve 6 is fixed and the second sleeve 8 rotates synchronously with the roller, relative sliding will occur between the electric contact ring and the brush, and the electric contact ring and the brush always remain in contact, enabling continuous power transmission. Specifically, the electric energy introduced from the external power supply through the first terminal 7 passes through the electric contact ring and the brush and is finally transmitted to the second terminal 9 to provide power for the charging cable 5. Through the design of the electric contact ring and the brush in this embodiment, the problem of how to continuously transmit power during the rotation of the roller 4 is ingeniously solved, so that the charging cable 5 can always maintain a connection with the power supply when being stored or released, without worrying that the rotation of the cable will affect power transmission. This makes the use of the device more convenient and reliable.

[0055] In some embodiments, the transmission mechanism includes an internal gear ring 18 and a driving gear 17. The internal gear ring 18 is coaxial with the roller 4 and fixed to its inner peripheral wall. The driving gear 17 is fixed to the output shaft of the motor 10 and meshes with the internal gear ring 18.

[0056] Specifically, when the motor 10 is started, its output shaft rotates and drives the driving gear 17 to rotate. The teeth of the driving gear 17 mesh with the teeth of the internal gear ring 18, thereby transmitting the rotational torque to the internal gear ring 18. Since the internal gear ring 18 is fixedly connected to the roller 4, the roller 4 will also rotate with the rotation of the internal gear ring 18. In this way, the motor 10 drives the rotation of the roller 4 through the transmission mechanism, and thus the storage and release of the charging cable 5 are realized. Through the meshing transmission of the internal gear ring 18 and the driving gear 17, efficient torque transmission from the motor 10 to the roller 4 is achieved, which has the advantages of accurate transmission ratio and high transmission efficiency.

[0057] In some embodiments, the wire roller body includes a plurality of wire rollers 19. The two ends of the wire rollers 19 are respectively rotatably connected to the left support plate 2 and the right support plate 3. The plurality of wire rollers 19 are all parallel to the central axis 1 and are circumferentially distributed on the outside of the roller 4.

[0058] Specifically, the wire rollers distributed in a circular pattern can also provide a uniform support structure for the cable, enabling the cable to be wound more tightly around the roller during storage; moreover, due to the rotational design of the wire rollers, the cable makes rolling contact with them during storage or release, reducing wear and tear.

[0059] In some embodiments, a spiral plate 20 is provided on the outer peripheral wall of the roller 4. The outer peripheral wall of the roller 4 and the spiral plate 20 form a spiral groove for guiding the charging cable 5 to be spirally wound around the outer peripheral wall of the roller 4.

[0060] Specifically, when the charging cable 5 needs to be stored in the roller 4, it is guided into the spiral groove. As the roller 4 rotates, the cable will be spirally wound along the path of the spiral groove in an orderly manner until it is completely stored inside the roller 4. The design of the spiral groove enables the charging cable to be spirally wound in an orderly manner along a fixed path during storage, improving the storage efficiency of the cable.

[0061] In some embodiments, an installation groove is provided on the outer peripheral wall of the left end of the roller 4. A first pressure sensor 21 is provided in the installation groove. The first pressure sensor 21 is provided with a first compression spring piece for contacting a predetermined part of the charging cable 5 to limit the maximum release amount of the charging cable 5.

[0062] Specifically, according to actual requirements, a maximum release length of the charging cable can be preset in the device. Once the cable is released to this length, it will release the extrusion of the first compression spring piece. The first pressure sensor 21 receives the change in pressure and sends a signal to the control system. The control system will immediately stop the rotation of the roller 4, thereby preventing the cable from being further released.

[0063] In some embodiments, the device includes a wire seat 22, which is fixedly connected to the right support plate 3. The wire seat 22 is provided with a wire through groove 23 for guiding the front end of the charging cable 5 when it is released; the wire seat 22 is provided with a second pressure sensor 24. The second pressure sensor 24 is provided with a second compression spring piece for contacting the charging gun 25 at the front end of the charging cable to limit the maximum retraction amount of the charging cable 5.

[0064] Specifically, the wire seat 22 is designed with a wire through groove 23 for accurately guiding the front end of the charging cable 5 when it is released, ensuring that the cable can be smoothly released along a predetermined path; in addition, a second pressure sensor 24 is also installed on the wire seat 22. It contacts the charging gun 25 at the front end of the charging cable through the second compression spring piece. When the charging cable is retracted, once the charging gun presses the second compression spring piece, it will immediately trigger the second pressure sensor. The second pressure sensor 24 sends a signal to the control system. The control system will immediately stop the rotation of the roller 4, thereby preventing the cable from being further retracted.

[0065] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An electric drive built-in charging cable winding device, characterized in that: The invention comprises a line roller body, wherein the line roller body comprises: A central axis (1) for providing rotation support; The left support plate (2) and the right support plate (3) are symmetrically arranged on the left and right sides of the central axis (1); A roller (4) is coaxially arranged with the central axis (1) and is rotatably connected to the inner end surfaces of the two side support plates, and is used for winding and storing the charging cable (5); A first sleeve (6) is arranged inside the roller (4) and fixedly sleeved on the outside of the central shaft (1); a first terminal (7) is provided on the right end surface of the first sleeve (6) for connecting to a power source; a second sleeve (8), which is arranged inside the roller (4), movably sleeved on the outside of the first sleeve (6), and fixedly connected to the roller (4); a second terminal (9) which is electrically connected to the first terminal (7) is provided on the left end surface of the second sleeve (8) and is used to be electrically connected to the tail end of the charging cable (5); The motor (10) is arranged inside the roller (4) and is fixedly connected to the right support plate (3). The motor (10) is electrically connected to the first terminal (7) and drives the roller (4) to rotate through a transmission mechanism.

2. The electric drive built-in charging cable winding device according to claim 1, characterized in that: A first support ring (11) is fixedly provided on the inner end surface of the left support plate (2); the inner peripheral wall of the first support ring (11) is connected to the outer ring of the first bearing (12); the inner ring of the first bearing (12) is connected to the left end of the roller (4), so as to realize the rotation connection between the roller (4) and the left support plate (2); A second support ring (13) is fixedly provided on the inner end surface of the right support plate (3); the outer peripheral wall of the second support ring (13) is connected to the inner ring of the second bearing (14); and the outer ring of the second bearing (14) is connected to the right end of the roller (4); thereby realizing a rotational connection between the roller (4) and the right support plate (3).

3. The electric drive built-in charging cable winding device according to claim 2, characterized in that: The left end of the roller (4) is connected to a left end plate (15) that rotates synchronously therewith, the inner ring of the first bearing (12) is connected to the left end plate (15), the left end plate (15) is provided with a first inner hole, and the left end of the second sleeve (8) passes through the first inner hole and is fixed thereto; A right end plate (16) is provided at the right end of the roller (4), and the right end plate (16) is fixed to the second support ring (13). The right end plate (16) is provided with a second inner hole, and the right end of the second sleeve (8) passes through the second inner hole and is loosely fitted therewith; the motor (10) is fixed to the right end plate (16).

4. The electric drive built-in charging cable winding device according to claim 3, characterized in that: The outer peripheral wall at the left end of the roller (4) is provided with a cable clamp (26) and a wire groove (27), and the left end plate (15) is provided with a wire hole (28) communicating with the wire groove (27).

5. The electric drive built-in charging cable winding device according to claim 1, characterized in that: An electric contact ring is provided on the outer side of the first sleeve (6), and the electric contact ring is electrically connected to the first terminal (7). An electric brush is provided on the inner side of the second sleeve (8), and the electric brush is in sliding contact with the electric contact ring, and the electric brush is electrically connected to the second terminal (9).

6. The electric drive built-in charging cable winding device according to claim 1, characterized in that: The transmission mechanism comprises an inner gear ring (18) and a driving gear (17); the inner gear ring (18) is coaxial with the roller (4) and fixed to its inner peripheral wall; the driving gear (17) is fixed to the output shaft of the motor (10) and meshes with the inner gear ring (18).

7. The electric drive built-in charging cable winding device according to claim 1, characterized in that: The wire roller body comprises a plurality of wire rollers (19), the two ends of which are rotatably connected to the left support plate (2) and the right support plate (3), respectively; the plurality of wire rollers (19) are parallel to the central axis (1) and are circumferentially distributed on the outer side of the roller (4).

8. The electric drive built-in charging cable winding device according to claim 1, characterized in that: The outer peripheral wall of the roller (4) is provided with a spiral plate (20), and the outer peripheral wall of the roller (4) and the spiral plate (20) form a spiral groove for guiding the charging cable (5) to be spirally wound around the outer peripheral wall of the roller (4).

9. The electric drive built-in charging cable winding device according to claim 1, characterized in that: The outer peripheral wall at the left end of the roller (4) is provided with a mounting groove, in which a first pressure sensor (21) is provided, and the first pressure sensor (21) is provided with a first compression spring sheet for contacting a predetermined portion of the charging cable (5) to limit the maximum discharge amount of the charging cable (5).

10. The electric drive built-in charging cable winding device according to claim 1, characterized in that: The invention comprises a wire seat (22) fixed relative to the right support plate (3), wherein the wire seat (22) is provided with a wire groove (23) for guiding the front end of the charging cable (5) when the charging cable (5) is released; the wire seat (22) is provided with a second pressure sensor (24), and the second pressure sensor (24) is provided with a second compression spring sheet for contacting with a charging gun (25) at the front end of the charging cable to limit the maximum retraction amount of the charging cable (5).

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