Cable take-up and pay-off device of charging pile

Abstract

The utility model belongs to the field of charging piles, and particularly relates to a cable take-up and pay-off device of a charging pile, which comprises a box body, a mechanism frame, a motor, a winding turntable, a pay-off mechanism, a cable and a control circuit board, the motor respectively controls the coiling turntable to execute a coiling action and the uncoiling mechanism to execute an uncoiling action through the transmission gear box, the coiling turntable is provided with an accommodating groove matched with the diameter of a cable, one end of the cable is connected in the accommodating groove, the cable is wound in the accommodating groove, and the other end of the cable is connected with a charging gun exposed out of the box body; the motor respectively controls the winding turntable to execute a winding action and the unwinding mechanism to execute an unwinding action through the transmission gear box, so that automatic winding and unwinding of the cable winding and unwinding device can be realized; and the containing groove of the cable winding rotary disc is matched with the diameter of the cable, the cable can be regularly wound in the containing groove, the problems of cable knotting and disordered winding can be effectively solved, and therefore the working reliability of the cable winding and unwinding device can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of charging pile technology, specifically relating to a cable retraction device for a charging pile. Background Technology

[0002] Charging stations, 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 station's mounting box. Because the car's charging interface is low to the ground, using the charging gun requires dragging the charging cable. The charging cable is long and heavy, making this 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, charging stations with electric cable retraction mechanisms have emerged on the market.

[0003] The existing charging piles lack a structure for neatly storing the charging cables in their electric cable retraction devices, which easily leads to problems such as knotted and tangled charging cables, causing the charging gun's charging cable to be unable to extend or retract properly. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings and deficiencies of the existing technology and to provide a cable retraction device for charging piles.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A cable winding and unwinding device for a charging pile includes a housing, a mechanism frame disposed within the housing, a motor and a transmission gearbox disposed on the mechanism frame, a winding turntable and a unwinding mechanism disposed within the mechanism frame, a cable, and a control circuit board. The transmission gearbox is linked with the motor, and the motor controls the winding turntable to perform the winding action and the unwinding mechanism to perform the unwinding action through the transmission gearbox. The winding turntable is provided with a receiving groove that matches the diameter of the cable. One end of the cable is connected to the receiving groove and is wound inside the receiving groove. The other end of the cable is connected to a charging gun exposed outside the housing.

[0006] In some embodiments, the winding turntable includes a turntable base rotatably disposed within a mechanism frame and a turntable plate disposed on the turntable base. The turntable base has a gear ring that meshes with a transmission gearbox, and the receiving groove is formed between the turntable base and the turntable plate.

[0007] In some embodiments, a wire pressing block is detachably connected to the turntable base, the wire pressing block is provided with a wire pressing groove, a wire clamping cavity is formed between the wire pressing groove and the turntable base, the wire clamping cavity is connected to the receiving groove, and one end of the cable is fixed in the wire clamping cavity.

[0008] In some embodiments, the mechanism frame is provided with a micro switch detection assembly that cooperates with the turntable plate. The micro switch detection assembly includes a trigger shaft slidably disposed on the mechanism frame, a take-up limit micro switch, and a release limit micro switch. The take-up limit micro switch and the release limit micro switch are electrically connected to the control circuit board. The trigger shaft is linked to the turntable plate and slides back and forth on the mechanism frame as the turntable plate moves. The trigger shaft triggers the take-up limit micro switch and the release limit micro switch respectively, thereby turning the take-up limit micro switch and the release limit micro switch on or off.

[0009] In some embodiments, the mechanism frame is provided with a sliding hole through which the trigger shaft passes, and the trigger shaft is provided with a bearing inserted into the sliding hole.

[0010] In some embodiments, the outer wall of the turntable plate is provided with a spiral groove that cooperates with the trigger shaft. One end of the trigger shaft is inserted into the groove, thus forming a linkage between the trigger shaft and the turntable plate.

[0011] In some embodiments, the wire feeding mechanism includes a fixed frame, a drive wheel, and a pressure wheel mounted on a frame. The drive wheel and the pressure wheel are rotatably mounted in the fixed frame. The drive wheel is linked to a transmission gearbox. A pressure cavity is formed between the drive wheel and the pressure wheel, allowing the cable to pass through.

[0012] In some embodiments, the transmission gearbox includes a transmission shaft, a transmission gear, a take-up gear, a take-up gear, and a reversing assembly mounted on the transmission shaft. The take-up gear is rotatably mounted on the transmission shaft and meshes with a gear ring. The take-up gear is rotatably mounted on the transmission shaft and meshes with a pinion gear on a drive wheel. The reversing assembly includes a reversing plate mounted on the transmission shaft, a first pawl, and a second pawl. The first pawl and the second pawl are respectively mounted on both sides of the reversing plate. A drive gear meshing with the transmission gear is mounted on the output shaft of the motor. A reversing assembly is mounted on the take-up gear. A first ratchet is provided to engage with a first pawl, and a second ratchet is linked to the wire-feeding gear to engage with a second pawl. Elastic positioning elements are respectively provided between the first pawl, the second pawl, and the reversing plate. The elastic positioning elements maintain the engagement tendency between the first pawl and the second pawl and the first and second ratchet wheels, respectively. When the drive shaft rotates clockwise, the reversing plate drives the first ratchet wheel to rotate via the first pawl, preventing the second pawl from driving the second ratchet wheel to rotate. When the drive shaft rotates counterclockwise, the reversing plate drives the second ratchet wheel to rotate via the second pawl, preventing the first pawl from driving the first ratchet wheel to rotate.

[0013] In some embodiments, the frame includes a base plate disposed within the housing, a partition plate disposed on the base plate, and a plurality of support plates. The plurality of support plates are respectively disposed between the base plate and the partition plate. An accommodating space for placing a winding reel is formed between the base plate and the partition plate. The winding reel is rotatably disposed between the base plate and the partition plate, and roller bearings are respectively disposed between the winding reel and the base plate and the partition plate.

[0014] In some embodiments, the housing is provided with a power terminal block, and a waterproof connector for power cables to pass through is provided on the housing corresponding to the power terminal block. A gun head adapter is provided on one side of the housing corresponding to the power terminal block.

[0015] The beneficial effects of this utility model are as follows: The motor controls the winding turntable to perform the winding action and the unwinding mechanism to perform the unwinding action through the transmission gearbox, thereby realizing the automatic winding and unwinding of the cable winding and unwinding device. Furthermore, the receiving groove of the winding turntable matches the diameter of the cable, allowing the cable to be neatly wound within the receiving groove, effectively avoiding problems such as cable tangling and twisting, thus improving the working reliability of the cable winding and unwinding device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0018] Figure 2 This is an exploded view of an embodiment of the present utility model;

[0019] Figure 3 This is an internal structural diagram of an embodiment of the present utility model;

[0020] Figure 4 This is an exploded view of the winding turntable according to an embodiment of the present invention;

[0021] Figure 5 This is a structural diagram of the commutation assembly according to an embodiment of the present utility model;

[0022] Figure 6 This is an assembly diagram of the first ratchet and the first pawl in an embodiment of the present invention;

[0023] Figure 7 This is an assembly diagram of the second ratchet and the second pawl in an embodiment of the present invention. Detailed Implementation

[0024] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0026] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0027] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0028] like Figure 1-4 As shown, a cable winding and unwinding device for a charging pile includes a housing 1, a mechanism frame 2 disposed within the housing 1, a motor 3 and a transmission gearbox 4 disposed on the mechanism frame 2, a winding reel 5 and a unwinding mechanism 6 disposed within the mechanism frame 2, a cable 10, and a control circuit board 100. The transmission gearbox 4 is linked to the motor 3. The motor 3 controls the winding reel 5 to perform the winding action and the unwinding mechanism 6 to perform the unwinding action through the transmission gearbox 4. The winding reel 5 is provided with a receiving groove 50 that matches the diameter of the cable 10. One end of the cable 10 is connected to the receiving groove 50 and is wound within the receiving groove 50. The other end of the cable 10 is connected to a charging gun 7 exposed outside the housing 1. The motor controls the winding reel to perform the winding action and the unwinding mechanism to perform the unwinding action through the transmission gearbox, thereby realizing the automatic winding and unwinding of the cable. Furthermore, the receiving groove of the cable reel is matched with the diameter of the cable, and the cable can be neatly wound in the receiving groove, which can effectively avoid the problems of cable tangling and messiness, thereby improving the working reliability of the cable winding and unwinding device.

[0029] like Figure 2 , 4As shown, the cable winding turntable 5 includes a turntable base 51 rotatably mounted within the mechanism frame 2 and a turntable plate 52 mounted on the turntable base 51. The turntable base 51 has a gear ring 511 that meshes with the transmission gearbox 4, and a receiving groove 50 is formed between the turntable base 51 and the turntable plate 52. The turntable base meshes with the transmission gearbox through the gear ring, thereby ensuring more reliable transmission between the cable winding turntable and the transmission gearbox. A wire clamping block 53 is detachably connected to the turntable base 51. The wire clamping block 53 is provided with a wire clamping groove 531, and a wire clamping cavity 530 is formed between the wire clamping groove 531 and the turntable base 51. The wire clamping cavity 530 communicates with the receiving groove 50, and one end of the cable 10 is fixed in the wire clamping cavity 530. One end of the cable is pressed onto the turntable base by the wire clamping block, and the wire clamping block is connected to the turntable base by fasteners, thereby facilitating the assembly of the cable and the turntable base and improving assembly efficiency. The frame 2 is equipped with a micro switch detection assembly 8 that cooperates with the turntable 52. The micro switch detection assembly 8 includes a trigger shaft 81 slidably mounted on the frame 2, a take-up limit micro switch 82, and a release limit micro switch 83. The take-up limit micro switch 82 and the release limit micro switch 83 are electrically connected to the control circuit board 100. The trigger shaft 81 is linked to the turntable 52 and slides back and forth on the frame 2 as the turntable 52 moves. The trigger shaft 81 triggers the take-up limit micro switch 82 and the release limit micro switch 83 respectively, realizing the connection or disconnection of the take-up limit micro switch 82 and the release limit micro switch 83. When the cable is taken up to the limit position (the cable is completely retracted), the trigger shaft triggers the take-up limit micro switch. The take-up limit switch can send the detected limit take-up signal to the control circuit board, and the control circuit board controls the motor to stop rotating, thereby stopping the cable take-up and release device. When the cable is laid out to its limit (fully extended), the cable laying limit switch sends the detected limit signal to the control circuit board. The control circuit board then stops the motor, thus stopping the cable winding and unwinding device. The microswitch detection component can monitor the winding and unwinding limit positions of the winding reel, resulting in higher reliability and extending the service life of the cable winding and unwinding device.

[0030] like Figure 4 As shown, the frame 2 has a sliding hole 20 through which the trigger shaft 81 passes, and a bearing 84 is installed on the trigger shaft 81, which is inserted into the sliding hole 20. The trigger shaft is slidably mounted in the sliding hole via the bearing, which facilitates the assembly of the trigger shaft with the frame and ensures that the trigger shaft can reliably operate within the sliding hole. The outer wall of the turntable plate 52 has a helical actuation groove 521 that cooperates with the trigger shaft 81. One end of the trigger shaft 81 is inserted into the actuation groove 521, forming a linkage between the trigger shaft 521 and the turntable plate 52. The turntable plate drives the trigger shaft to operate through the actuation groove, so that when the turntable rotates, the trigger shaft can reliably slide in the sliding hole, ensuring the transmission reliability between the trigger shaft and the turntable plate.

[0031] like Figure 2 and 3 As shown, the cable feeding mechanism 6 includes a fixed frame 61, a drive wheel 62, and a pressure wheel 63 mounted on the mechanism frame 2. The drive wheel 62 and the pressure wheel 63 are rotatably mounted within the fixed frame 61. The drive wheel 62 is linked to the transmission gearbox 4, and a pressure cavity 60 is formed between the drive wheel 62 and the pressure wheel 63, allowing the cable 10 to pass through. The motor drives the drive wheel to rotate through the transmission gearbox, and the pressure wheel presses against the cable, causing tension between the pressure wheel and the winding turntable. The drive wheel moves the cable, thereby realizing the automatic cable feeding of the cable feeding device.

[0032] like Figure 2 , 3As shown in Figures 5, 6, and 7, the transmission gearbox 4 includes a transmission shaft 41 and a transmission gear 42, a take-up gear 43, and a release gear 44, all linked to the transmission shaft 41. A reversing assembly 45 is also mounted on the transmission shaft 41. The take-up gear 43 is rotatably mounted on the transmission shaft 41 and meshes with a gear ring 511. The release gear 44 is rotatably mounted on the transmission shaft 41 and meshes with a pinion 621 on the drive wheel 62. The reversing assembly 45 includes a reversing plate 451, a first pawl 452, and a second pawl 453, all linked to the transmission shaft 41. The first pawl 452 and the second pawl 453 are respectively mounted on both sides of the reversing plate 451. A drive gear 31 meshing with the transmission gear 42 is mounted on the output shaft of the motor 3. A drive gear 31 meshing with the first pawl 452 is mounted on the take-up gear 43. A first ratchet 431 engages with the wire feeding gear 44, and a second ratchet 441 engages with the second pawl 453. Elastic positioning elements 454 are respectively provided between the first pawl 452, the second pawl 453, and the reversing plate 451. The elastic positioning elements 454 keep the first pawl 452 and the second pawl 453 engaged with the first ratchet 431 and the second ratchet 441, respectively. When the drive shaft 41 rotates clockwise, the reversing plate 451 drives the first ratchet 431 to rotate via the first pawl 452, preventing the second pawl 453 from driving the second ratchet 441. When the drive shaft 41 rotates counterclockwise, the reversing plate 451 drives the second ratchet 441 to rotate via the second pawl 453, preventing the first pawl 452 from driving the first ratchet 431. The control circuit board controls the forward and reverse rotation of the motor. The motor drives the winding turntable and the wire feeding mechanism through the transmission gearbox, thereby realizing the automatic winding and unwinding of the cable. The reversing assembly provides unidirectional drive and intermittent motion for the take-up and release gears. The transmission gearbox switches the clockwise and counterclockwise rotation of the drive shaft via the forward and reverse rotation of the motor, thus ensuring stable take-up and release of the charging pile cable and improving the reliability of the cable take-up and release device. When the cable take-up and release device is working, when the motor drives the drive shaft to rotate clockwise via the drive gear and transmission gear, the drive shaft drives the reversing plate to rotate. The reversing plate drives the first and second pawls to move in the same direction (the second pawl does not drive the second ratchet to rotate). The first pawl drives the first ratchet and take-up gear to rotate, and the take-up gear drives the winding turntable to perform the take-up action. The winding turntable pulls the cable, and the release mechanism drive wheel rotates with the cable. The drive wheel rotates and moves the cable in the take-up direction, making it easier for the cable to be wound into the winding turntable. This prevents the cable from becoming tangled or knotted due to looseness, achieving automatic take-up of the cable.When the motor drives the drive shaft to rotate counterclockwise via the drive gear and transmission gear, the drive shaft drives the reversing plate to rotate. The reversing plate drives the first pawl and the second pawl to move in the same direction (the first pawl does not drive the first ratchet to rotate). The second pawl drives the second ratchet and the wire feeding gear to rotate. The wire feeding gear drives the drive wheel to rotate via the pinion. The pressure wheel presses the cable, causing tension between the wire feeding mechanism and the winding turntable. The drive wheel rotates and drives the cable to move, thereby realizing the automatic wire feeding of the cable winding and feeding device.

[0033] like Figure 1 and 2 As shown, the frame 2 includes a base plate 21 disposed within the housing 1, a partition plate 22 disposed on the base plate 21, and multiple support plates 23. The support plates 23 are respectively disposed between the base plate 21 and the partition plate 22, forming an accommodating space between the base plate 21 and the partition plate 22 for placing the winding reel 5. The winding reel 5 is rotatably disposed between the base plate 21 and the partition plate 22, and roller bearings 24 are respectively disposed between the winding reel 5 and the base plate 21 and the partition plate 22. The winding reel is disposed within the accommodating space, facilitating the assembly of the winding reel with the frame. The partition plate and the base plate provide protection for the winding reel, ensuring its reliable operation. A power terminal 11 is disposed within the housing 1. A waterproof connector 12 for power cables to pass through is disposed on the housing 1 corresponding to the power terminal 11. A gun head adapter cable inlet 13 is disposed on one side of the housing 1 corresponding to the power terminal 11. The box is equipped with a charging head adapter cable inlet, which can be used as an adapter so that the cable retraction device can be adapted to ordinary charging piles. Simply plug the charging head of an ordinary charging pile (without automatic cable retraction function) into the charging head adapter cable inlet to complete the installation, making it more convenient to use.

[0034] The above description is only one embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model; the scope of protection of the present utility model is defined by the claims in the claims, and all equivalent changes and modifications made in accordance with the utility model are within the scope of protection of the present utility model patent.

Claims

1. A cable retraction device for a charging pile, characterized in that: The device includes a housing, a frame housed within the housing, a motor and a transmission gearbox mounted on the frame, a winding reel and a unwinding mechanism housed within the frame, a cable, and a control circuit board. The transmission gearbox is linked to the motor, which controls the winding reel to perform the winding action and the unwinding mechanism to perform the unwinding action via the transmission gearbox. The winding reel has a receiving groove matching the diameter of the cable. One end of the cable is connected to the receiving groove and is wound within it. The other end of the cable is connected to a charging gun protruding from the housing.

2. The cable retraction device for a charging pile according to claim 1, characterized in that: The winding turntable includes a turntable base rotatably disposed within a mechanism frame and a turntable plate disposed on the turntable base. The turntable base has a gear ring that meshes with a transmission gearbox, and the receiving groove is formed between the turntable base and the turntable plate.

3. The cable retraction device for a charging pile according to claim 2, characterized in that: A wire pressing block is detachably connected to the turntable base. The wire pressing block is provided with a wire pressing groove. A wire clamping cavity is formed between the wire pressing groove and the turntable base. The wire clamping cavity is connected to the receiving groove. One end of the cable is fixed in the wire clamping cavity.

4. The cable retraction device for a charging pile according to claim 2 or 3, characterized in that: The mechanism frame is equipped with a micro switch detection assembly that cooperates with the turntable plate. The micro switch detection assembly includes a trigger shaft slidably mounted on the mechanism frame, a take-up limit micro switch, and a release limit micro switch. The take-up limit micro switch and the release limit micro switch are electrically connected to the control circuit board. The trigger shaft is linked with the turntable plate and slides back and forth on the mechanism frame as the turntable plate moves. The trigger shaft triggers the take-up limit micro switch and the release limit micro switch respectively, realizing the connection or disconnection of the take-up limit micro switch and the release limit micro switch.

5. The cable retraction device for a charging pile according to claim 4, characterized in that: The mechanism frame is provided with a sliding hole through which the trigger shaft can pass, and the trigger shaft is provided with a bearing inserted into the sliding hole.

6. The cable retraction device for a charging pile according to claim 4, characterized in that: The outer wall of the turntable plate is provided with a spiral groove that cooperates with the trigger shaft. One end of the trigger shaft is inserted into the groove, thus forming a linkage between the trigger shaft and the turntable plate.

7. The cable retraction device for a charging pile according to claim 2, characterized in that: The cable feeding mechanism includes a fixed frame, a drive wheel, and a pressure wheel mounted on the frame. The drive wheel and the pressure wheel are rotatably mounted inside the fixed frame. The drive wheel is linked to the transmission gearbox. A pressure cavity is formed between the drive wheel and the pressure wheel, allowing the cable to pass through.

8. The cable retraction device for a charging pile according to claim 7, characterized in that: The transmission gearbox includes a transmission shaft, a transmission gear, a take-up gear, a take-up gear, and a reversing assembly mounted on the transmission shaft. The take-up gear is rotatably mounted on the transmission shaft and meshes with a gear ring. The take-up gear is rotatably mounted on the transmission shaft and meshes with a pinion gear on the drive wheel. The reversing assembly includes a reversing plate, a first pawl, and a second pawl mounted on the transmission shaft. The first and second pawls are respectively mounted on both sides of the reversing plate. The output shaft of the motor has a drive gear that meshes with the transmission gear. The take-up gear has a drive gear that meshes with the first pawl. A first ratchet with a pawl engages with the first ratchet wheel, and a second ratchet wheel with a second pawl is linked to the wire-feeding gear. Elastic positioning elements are respectively provided between the first and second pawls and the reversing plate. The elastic positioning elements maintain the engagement tendency between the first and second pawls and the first and second ratchet wheels, respectively. When the drive shaft rotates clockwise, the reversing plate drives the first ratchet wheel to rotate via the first pawl, preventing the second pawl from driving the second ratchet wheel to rotate. When the drive shaft rotates counterclockwise, the reversing plate drives the second ratchet wheel to rotate via the second pawl, preventing the first pawl from driving the first ratchet wheel to rotate.

9. The cable retraction device for a charging pile according to claim 1, characterized in that: The frame includes a base plate disposed inside the box, a partition plate disposed on the base plate, and multiple support plates. The multiple support plates are respectively disposed between the base plate and the partition plate. A receiving space for placing a winding turntable is formed between the base plate and the partition plate. The winding turntable is rotatably disposed between the base plate and the partition plate, and roller bearings are respectively disposed between the winding turntable and the base plate and the partition plate.

10. The cable retraction device for a charging pile according to claim 9, characterized in that: The box is equipped with a power terminal block, and a waterproof connector for power cables to pass through is provided on the box corresponding to the power terminal block. A gun head adapter cable inlet is provided on the side of the box corresponding to the power terminal block.

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