A device for cable winding and unwinding.

Abstract

This utility model discloses a device for cable winding and unwinding, including a housing, a cable reel rotatably disposed within the housing for accommodating the cable, and a drive mechanism for driving the cable reel to rotate for cable winding and unwinding. One end of the cable is connected to the cable reel, and a guide hole is provided on the side of the housing for the other end of the cable to extend out. It also includes a positioning mechanism comprising a reel and an elastic band. The reel is rotatably mounted inside the housing, and the reel and cable reel share or are driven by separate mechanisms. The two ends of the elastic band are connected to the reel and the cable reel, respectively. The cable reel has an annular winding groove, in which the cable is wound in a spiral pattern. The portion of the elastic band located in the annular winding groove is in close contact with one side of the cable and extends along the spiral path of the cable. This utility model ensures that charging cables are neatly stored, preventing stacking and tangling during winding and unwinding, and guaranteeing the normal winding and unwinding of charging cables.

Description

Technical Field

[0001] This utility model relates to the field of charging pile technology, and more specifically to a device for charging pile cable retraction and extension. Background Technology

[0002] Charging piles, also known as electric vehicle charging stations or electric vehicle power supply equipment, are devices that provide electrical energy to electric vehicles, enabling them to store enough electricity to support their operation. When charging an electric vehicle, the charging gun needs to be pulled out of the charging pile's mounting box. Because the car's charging interface is low to the ground, using the charging gun requires dragging the charging cable, which is long and heavy, making it time-consuming, laborious, and difficult to operate. Furthermore, each time the cable is charged, its insulation layer rubs against the ground, causing damage and shortening its lifespan, potentially leading to safety hazards. Therefore, smart charging piles with automatically retractable charging cables have emerged on the market.

[0003] Currently, most charging pile cable reels on the market are simply used to wind cables directly, without any lateral restraint on the cables. For example, Chinese invention patent application CN202410653860.9 discloses a charging pile with automatic cable winding and unwinding function, which includes a cable reel, an output cable, a charging gun, a drive mechanism, and a controller. The output cable is wound on the cable reel, with one end connected to the charging gun and the other end connected to a power source. The cable reel is installed inside the charging pile and can rotate freely. The drive mechanism is connected to the cable reel and is used to drive the cable reel to rotate forward or backward. Because the cable is directly wound on the reel, it is easy for the cable to become stacked and tangled, making it impossible to properly wind and unwind the charging cables on the charging pile. Utility Model Content

[0004] The purpose of this invention is to provide a device for cable storage and retraction. This invention can ensure that charging cables are neatly stored and avoid stacking and tangling during storage and retraction, thereby ensuring the normal storage and use of charging cables.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for cable winding and unwinding, comprising a housing, a rotatable reel disposed within the housing for accommodating cables, and a drive mechanism for driving the reel to rotate for cable winding and unwinding. One end of the cable is connected to the reel, and the side of the housing is provided with a guide hole for the other end of the cable to extend out. It also includes a positioning mechanism, comprising a reel and an elastic band. The reel is rotatably mounted inside the housing, and the reel and the cable reel share or are driven by a separate drive mechanism. The two ends of the elastic band are respectively connected to the reel and the cable reel. The reel is provided with an annular winding groove, and the cable is wound in a spiral pattern within the annular winding groove. The portion of the elastic band located within the annular winding groove is in close contact with one side of the cable and extends along the spiral path of the cable.

[0006] By adopting the above technical solution, the cable is wound and unwound by driving the reel to rotate through the drive mechanism. The cable is arranged in a spiral winding pattern. An elastic band is set tightly on one side of the cable, which also adopts a spiral extension method. It separates each turn of the cable from the inside to the outside, supports and constrains each turn of the cable, and limits the radial and axial positions of the cable relative to the reel. This prevents the cable from stacking and tangling between adjacent turns, making the cable winding and unwinding more neat and orderly, ensuring the long-term normal winding and unwinding of the cable, and improving structural stability.

[0007] The present invention is further configured such that the elastic band is made of steel.

[0008] By adopting the above technical solution, the steel strip not only has high strength but also good elasticity, which can provide reliable support and limiting function for the cable.

[0009] The present invention is further configured such that the tape reel and the cable reel share a common driving mechanism. The driving mechanism includes a drive motor, a drive gear, a differential gear assembly, a first driven gear, and a second driven gear. The drive gear is circumferentially mounted on the motor shaft of the drive motor. The first driven gear and the second driven gear are circumferentially mounted on the sides of the tape reel and the cable reel, respectively. The drive gear is linked with the first driven gear and the second driven gear through the differential gear assembly. When the drive gear rotates clockwise, the differential gear assembly only drives the first driven gear to rotate, causing the tape reel to rotate and wind up the elastic tape. When the drive gear rotates counterclockwise, the differential gear assembly only drives the second driven gear to rotate, causing the cable reel to rotate and wind up the cable.

[0010] By adopting the above technical solution, the drive motor drives the tape reel or wire reel to rotate through gear transmission, making the transmission more precise and stable.

[0011] The present invention is further configured such that the differential gear assembly includes a primary transmission gear, a first linkage gear, and a second linkage gear. A linkage shaft is rotatably mounted inside the housing. The primary transmission gear is circumferentially mounted on the linkage shaft and meshes with the driving gear. The first linkage gear and the second linkage gear are both rotatably mounted on the linkage shaft and respectively engage with the first driven gear and the second driven gear for transmission. A rotating plate is circumferentially mounted on the linkage shaft between the first linkage gear and the second linkage gear. Both sides of the rotating plate are linked with the first linkage gear and the second linkage gear through a set of ratchet and pawl transmission assemblies. When the rotating plate rotates, it only drives the first linkage gear or the second linkage gear to rotate.

[0012] By adopting the above technical solution, it is possible to achieve the effect of one drive mechanism driving the tape reel or the cable reel to rotate independently. When the drive mechanism drives the tape reel to rotate, it winds up the elastic tape. The elastic tape pulls the cable reel to rotate, thus releasing the cable. When the drive mechanism drives the cable reel to rotate, it winds up the cable and pulls the elastic tape off the tape reel and close it to one side of the cable.

[0013] The present invention is further configured such that the differential gear assembly includes a bridge gear, the bridge gear is rotatably mounted in the housing via a rotating shaft, and the second linkage gear is connected to the second driven gear via the bridge gear.

[0014] By adopting the above technical solution and adding a bridge gear, not only can the transmission layout be optimized to adapt to space constraints, but the smoothness of the transmission can also be further enhanced.

[0015] The present invention is further configured to include an anti-loosening component, which includes a swing arm, an elastic element, and a bushing. One end of the swing arm is rotatably connected to the housing, and the bushing is rotatably installed on the other end of the swing arm. The elastic element applies a force to the swing arm in the direction of the reel, so that the bushing is pressed against the surface of the elastic tape on the reel.

[0016] By adopting the above technical solution, the bushing is pressed tightly against the surface of the elastic belt on the reel, so that it rolls and cooperates with the elastic belt, which can constrain the elastic belt and enable the reel to stably wind up and unwind the steel belt.

[0017] The present invention is further configured such that multiple limiting ribs are respectively provided on the left and right sides of the cable corresponding to the annular winding groove, and the limiting ribs extend radially along the winding reel.

[0018] By adopting the above technical solution, the limiting ribs abut against the left and right sides of the cable to form a limiting mechanism, which can not only further improve the stability of the cable winding and unwinding movement, but also reduce the contact area of ​​the cable, thereby reducing friction.

[0019] The present invention is further configured such that a pressure block is provided near the center of the cable reel, and the pressure block is provided with a positioning groove for inserting the inner end of the cable. When the pressure block is locked to the cable reel by fasteners, the cable is pressed and fixed on the cable reel.

[0020] By adopting the above technical solution, the cable is pressed by the slotted wire clamping block, which not only makes the fixing structure simple and reliable, but also makes it less likely to damage the cable.

[0021] The present invention is further configured such that one end of the elastic band is connected to the pressure block by a fastener.

[0022] By adopting the above technical solution, fasteners can be made of screws, the connection structure is simple and reliable, and disassembly and assembly are very convenient.

[0023] The present invention is further configured to include a conductive slip ring, which is disposed on the central shaft of the winding reel and electrically connected to the inner end of the cable. A bearing is also provided between the conductive slip ring and the winding reel.

[0024] By adopting the above technical solution, the conductive slip ring is connected to the power cord, which can prevent the power cord from spinning and getting tangled when the reel rotates. Attached Figure Description

[0025] Figure 1 This is an overall external view of the present utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the structure of the cable and elastic band wound together according to this utility model; Figure 4 This is a schematic diagram of the differential gear assembly of this utility model; Figure 5 This is a schematic diagram of the anti-loosening component of this utility model; Figure 6 This is a schematic diagram of the structure of the winding reel of this utility model; Figure 7 This is a schematic diagram of the structure of the cable and elastic band fixed on the reel of this utility model.

[0026] In the diagram: 1. Housing; 2. Winding reel; 3. Drive mechanism; 4. Guide hole; 5. Alignment mechanism; 6. Reel; 7. Elastic belt; 8. Annular winding groove; 9. Drive motor; 10. Drive gear; 11. Differential gear assembly; 12. First driven gear; 13. Second driven gear; 14. Primary transmission gear; 15. First linkage gear; 17. Second linkage gear; 18. Linkage shaft; 19. Rotating plate; 20. Ratchet and pawl transmission assembly; 21. Bridge gear; 22. Rotating shaft; 23. Anti-loosening component; 24. Swing arm; 25. Elastic element; 26. Bushing; 27. Limiting rib; 28. Wire pressing block; 29. ​​Positioning groove; 30. Conductive slip ring; 31. Bearing; 32. Cable. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example: As attached Figures 1-7 The device shown includes a housing 1, a rotatable reel 2 housed inside the housing 1 for holding a cable 32, and a drive mechanism 3 for driving the reel 2 to rotate and reel in the cable 32. One end of the cable 32 is connected to the reel 2. The side of the housing 1 has a guide hole 4 for the other end of the cable 32 to extend out, and the end of the cable 32 extending out of the guide hole 4 is connected to a charging head. The device also includes a positioning mechanism 5, which includes a reel 6 and an elastic band 7. The reel 6 is rotatably mounted inside the housing 1, and the reel 6 and the reel 2 share or are driven by a separate drive mechanism 3 to achieve rotation. The two ends of the elastic band 7 are connected to the reel 6 and the reel 2, respectively. The reel 2 has an annular winding groove 8, and the cable 32 is wound in a spiral pattern in the annular winding groove 8. The portion of the elastic band 7 located in the annular winding groove 8 is close to one side of the cable 32 and extends along the spiral path of the cable 32. The drive mechanism 3 drives the reel 2 to rotate, thereby enabling the cable 32 to be wound up and down. At the same time, the cable 32 is arranged in a spiral winding pattern. An elastic band 7 is set close to one side of the cable 32. The elastic band 7 also adopts a spiral extension method, which separates each turn of the cable 32 from the inside to the outside. It supports and constrains each turn of the cable 32, thereby limiting the radial and axial positions of the cable 32 relative to the reel 2. This prevents the cable 32 from stacking and tangling between adjacent turns, making the winding and unwinding of the cable 32 more neat and orderly, ensuring the long-term normal winding and unwinding of the cable 32, and improving the structural stability.

[0029] The elastic band 7 is made of steel. Steel bands are not only strong but also highly elastic, providing reliable support and restraint for the cable 32.

[0030] As attached Figures 2-4 As shown, the reel 6 and the winding reel 2 share a drive mechanism 3. The drive mechanism 3 includes a drive motor 9 (the drive motor 9 can rotate in both directions), a drive gear 10, a differential gear assembly 11, a first driven gear 12, and a second driven gear 13. The drive gear 10 is mounted on the motor shaft of the drive motor 9 in a circumferential linkage (non-circular shaft hole fit, synchronous rotation). The first driven gear 12 and the second driven gear 13 are respectively mounted on the sides of the reel 6 and the winding reel 2 in a circumferential linkage (synchronous rotation). The drive gear 10 is linked with the first driven gear 12 and the second driven gear 13 through the differential gear assembly 11. When the drive gear 10 rotates clockwise, the differential gear assembly 11 only drives the first driven gear 12 to rotate, causing the reel 6 to rotate to wind the elastic belt 7. When the drive gear 10 rotates counterclockwise, the differential gear assembly 11 only drives the second driven gear 13 to rotate, causing the winding reel 2 to rotate to wind the cable 32. The drive motor 9 drives the tape reel 6 or the winding reel 2 to rotate through gear transmission, making the transmission more precise and stable.

[0031] In addition, the control circuit board can be connected to the drive motor 9, and the remote control module can be connected to the power-on control circuit board. The start, stop and forward / reverse rotation of the drive motor 9 can be controlled remotely via Bluetooth to realize the winding and unwinding of the cable 32.

[0032] As attached Figure 2 and attached Figure 4As shown, the differential gear assembly 11 includes a primary transmission gear 14, a first linkage gear 15, and a second linkage gear 17. A linkage shaft 18 is rotatably mounted inside the housing 1. The primary transmission gear 14 is circumferentially mounted on the linkage shaft 18 and meshes with the driving gear 10. The first linkage gear 15 and the second linkage gear 17 are both rotatably mounted on the linkage shaft 18 and respectively engage with the first driven gear 12 and the second driven gear 13 for transmission. A rotating plate 19 is circumferentially mounted on the linkage shaft 18 between the first linkage gear 15 and the second linkage gear 17. Both sides of the rotating plate 19 are connected to the first linkage gear 15 and the second linkage gear 17 via a set of ratchet and pawl transmission assemblies 20. The two linkage gears 17 form a linkage, and when the rotating plate 19 rotates, it only drives the first linkage gear 15 or the second linkage gear 17 to rotate. The ratchet and pawl transmission assembly 20 is composed of a ratchet, a pawl, and a torsion spring. Taking the ratchet and pawl transmission assembly 20 set between the rotating plate 19 and the first linkage gear 15 as an example, its ratchet is coaxially connected to the side of the first linkage gear by a screw. The side of the rotating plate 19 is provided with a fixed shaft (which can be a screw). The pawl is rotatably set on the fixed shaft and acts as a brake. One end of the torsion spring is connected to the rotating plate 19, and the other end is connected to the pawl, so that the pawl abuts against the teeth on the outer circumference of the ratchet, thereby realizing the effect of the rotating plate 19 rotating clockwise and driving the first linkage gear 15 to rotate counterclockwise. This design enables a single drive mechanism 3 to drive either the reel 6 or the cable reel 2 to rotate independently. When the drive mechanism 3 drives the reel 6 to rotate, it winds up the elastic band 7. The elastic band 7 pulls the cable reel 2 to rotate, thus releasing the cable 32. When the drive mechanism 3 drives the cable reel 2 to rotate, it winds up the cable 32 and simultaneously pulls the elastic band 7 off the reel 6 and close it to one side of the cable 32.

[0033] As attached Figure 2 As shown, the differential gear assembly 11 also includes a bridging gear 21, which is rotatably mounted in the housing 1 via a rotating shaft 22. The second driven gear 17 is connected to the second driven gear 13 via the bridging gear 21, i.e., it meshes with the bridging gear 21 and the second driven gear 13 respectively. By adding the bridging gear 21, not only can the transmission layout be optimized and space constraints be accommodated, but the smoothness of the transmission can also be further enhanced.

[0034] As attached Figure 2 and attached Figure 5As shown, it also includes an anti-loosening component 23, which includes a swing arm 24, an elastic element 25, and a bushing 26. One end of the swing arm 24 is rotatably connected to the housing 1 via a rivet A, and the bushing 26 is rotatably mounted to the other end of the swing arm 24 via a rivet B. The elastic element 25 applies a force to the swing arm 24 in the direction of the reel 6, so that the bushing 26 is pressed tightly against the surface of the elastic strip 7 on the reel 6. In this embodiment, the elastic element 25 is a torsion spring, which is sleeved on the outer periphery of the rivet A. One end of the torsion spring is fixed to the housing 1, and the other end is fixed to the swing arm 24. By pressing the bushing 26 tightly against the surface of the elastic strip 7 on the reel 6, making it roll-fitted with the elastic strip 7, the elastic strip 7 can be constrained, allowing the reel 6 to stably wind up and unwind the steel strip.

[0035] As attached Figure 6 As shown, the annular winding groove 8 is provided with multiple limiting ribs 27 arranged in a circular array on the left and right sides of the cable 32, and the limiting ribs 27 extend radially along the winding reel 2. By the limiting ribs 27 abutting against the left and right sides of the cable 32 to form a limiting, it can not only further improve the stability of the cable 32's winding and unwinding movement, but also reduce the contact surface of the cable 32, thereby reducing friction.

[0036] As attached Figure 7 As shown, a cable clamping block 28 is provided near the center of the cable reel 2. The cable clamping block 28 has a positioning groove 29 for inserting the inner end of the cable 32. When the cable clamping block 28 is locked to the cable reel 2 by fasteners (such as screws), the cable 32 is clamped and fixed on the cable reel 2. The cable clamping block 28 with slots clamps the cable 32, which not only makes the fixing structure simple and reliable, but also makes it less likely to damage the cable 32.

[0037] As attached Figure 7 As shown, one end of the elastic band 7 is connected to the pressure block 28 via a fastener (which can be a screw). The fastener can be a screw, making the connection structure simple, reliable, and easy to assemble and disassemble.

[0038] As attached Figure 6 As shown, it also includes a conductive slip ring 30, which is disposed at the central axis of the reel 2 and electrically connected to the inner end of the cable 32. A bearing 31 is also provided between the conductive slip ring 30 and the reel 2. The conductive slip ring 30 is connected to the power cord and can prevent the power cord from spinning and tangling when the reel 2 rotates.

Claims

1. A device for cable winding and unwinding, comprising a housing (1), a rotatable reel (2) disposed within the housing (1) for accommodating a cable (32), and a drive mechanism (3) for driving the reel (2) to rotate to wind and unwind the cable (32), wherein one end of the cable (32) is connected to the reel (2), and the side of the housing (1) is provided with a guide hole (4) for the other end of the cable (32) to extend out; characterized in that: It also includes a positioning mechanism (5), which includes a reel (6) and an elastic band (7). The reel (6) is rotatably installed inside the housing (1), and the reel (6) and the winding reel (2) share or are driven by a separate drive mechanism (3) to achieve rotation. The two ends of the elastic band (7) are connected to the reel (6) and the winding reel (2) respectively. The winding reel (2) is provided with an annular winding groove (8), and the cable (32) is wound in a spiral in the annular winding groove (8). The part of the elastic band (7) located in the annular winding groove (8) is close to one side of the cable (32) and extends along the spiral path of the cable (32).

2. The device for cable winding and unwinding according to claim 1, characterized in that: The elastic band (7) is made of steel.

3. The device for cable winding and unwinding according to claim 1, characterized in that: The tape reel (6) and the winding reel (2) share a drive mechanism (3). The drive mechanism (3) includes a drive motor (9), a drive gear (10), a differential gear assembly (11), a first driven gear (12), and a second driven gear (13). The drive gear (10) is circumferentially mounted on the motor shaft of the drive motor (9). The first driven gear (12) and the second driven gear (13) are circumferentially mounted on the sides of the tape reel (6) and the winding reel (2), respectively. The driving gear (10) is linked with the first driven gear (12) and the second driven gear (13) through the differential gear assembly (11). When the driving gear (10) rotates clockwise, the differential gear assembly (11) only drives the first driven gear (12) to rotate, causing the winding reel (6) to rotate and wind up the elastic belt (7). When the driving gear (10) rotates counterclockwise, the differential gear assembly (11) only drives the second driven gear (13) to rotate, causing the winding reel (2) to rotate and wind up the cable (32).

4. The device for cable winding and unwinding according to claim 3, characterized in that: The differential gear assembly (11) includes a primary transmission gear (14), a first linkage gear (15), and a second linkage gear (17). A linkage shaft (18) is rotatably installed inside the housing (1). The primary transmission gear (14) is circumferentially mounted on the linkage shaft (18) and meshes with the driving gear (10). The first linkage gear (15) and the second linkage gear (17) are both rotatably mounted on the linkage shaft (18) and respectively cooperate with the first driven gear (12) and the second driven gear (13) for transmission. A rotating plate (19) is circumferentially mounted on the linkage shaft (18) between the first linkage gear (15) and the second linkage gear (17). The two sides of the rotating plate (19) are respectively linked with the first linkage gear (15) and the second linkage gear (17) through a set of ratchet and pawl transmission assemblies (20). When the rotating plate (19) rotates, it only drives the first linkage gear (15) or the second linkage gear (17) to rotate.

5. The device for cable winding and unwinding according to claim 4, characterized in that: The differential gear assembly (11) also includes a bridge gear (21), which is rotatably mounted in the housing (1) via a rotating shaft (22). The second linkage gear (17) is connected to the second driven gear (13) via the bridge gear (21).

6. The device for cable winding and unwinding according to claim 1, characterized in that: It also includes an anti-loosening component (23), which includes a swing arm (24), an elastic element (25), and a bushing (26). One end of the swing arm (24) is rotatably connected to the housing (1), and the bushing (26) is rotatably mounted on the other end of the swing arm (24). The elastic element (25) applies a force to the swing arm (24) in the direction of the reel (6), so that the bushing (26) is pressed against the surface of the elastic band (7) on the reel (6).

7. The device for cable winding and unwinding according to claim 1, characterized in that: The annular winding groove (8) is provided with multiple limiting ribs (27) arranged in a circular array on the left and right sides of the cable (32), and the limiting ribs (27) extend radially along the winding reel (2).

8. The device for cable winding and unwinding according to claim 1, characterized in that: The cable reel (2) has a pressure block (28) near the center. The pressure block (28) has a positioning groove (29) for inserting the inner end of the cable (32). When the pressure block (28) is locked to the cable reel (2) by fasteners, the cable (32) is pressed and fixed on the cable reel (2).

9. A device for cable winding and unwinding according to claim 8, characterized in that: One end of the elastic band (7) is connected to the pressure block (28) by a fastener.

10. The device for cable winding and unwinding according to claim 1, characterized in that: It also includes a conductive slip ring (30), which is disposed on the central axis of the winding reel (2) and electrically connected to the inner end of the cable (32). A bearing (31) is also provided between the conductive slip ring (30) and the winding reel (2).

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