High-flexibility electric vehicle charging column cable

Abstract

The invention relates to the technical field of flexible cables, in particular to a high-flexibility electric vehicle charging pile cable. Comprising an outer layer, an insulating sleeve is arranged in the outer layer, an inner layer is arranged in the insulating sleeve, a plurality of wire cores are arranged in the inner layer, a reinforcing core is arranged in the middle of the inner layer, and a heat dissipation device is arranged between the inner wall of the inner layer and the outer wall of the reinforcing core. Through staggered layout of the first connecting frame and the second connecting frame, a plurality of wire cores in the inner layer are separated to form an independent heat dissipation channel, and the elastic ring is pulled by the insulating sleeve to move, so that one side of the pull strip is attached to the inner wall of the insulating sleeve, one side of the pressing strip is attached to the outer wall of the isolating sleeve, the rotation resistance of the inner layer and the outer layer of the cable is increased, and the service life of the cable is prolonged. And when the torsion disappears, the relative rotation function of the inner layer and the outer layer of the cable restores to the original position when being not stressed, so that the reliability and durability of the cable in a complex external force environment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible cables, in particular to a highly flexible electric vehicle charging column cable. Background Art

[0002] In the context of the global advocacy of green travel and the active promotion of energy conservation and emission reduction, the electric vehicle industry is booming. With the sharp increase in the number of electric vehicles, the construction of charging infrastructure is crucial, and the performance of high-flexible electric vehicle charging column cables, as key components in the charging process, is directly related to the charging efficiency, safety and long-term stable operation of the facilities.

[0003] Existing electric vehicle charging column cables need to be frequently moved and bent in charging scenarios, such as in public parking lots or fast charging stations. The cables may be bent dozens to hundreds of times a day. When the outer layer rotates due to accidental pulling, twisting, etc., the inner layer will be directly subjected to torque transmission. Since there is no relative rotation between the inner and outer layers to buffer the torque, it is very easy to cause the inner layer's core to twist, deform, or even break. At the same time, after the cable is subjected to torque, once the external force disappears, it cannot automatically return to its initial state, and the damage to the internal structure cannot be repaired. After multiple external forces, the cable performance gradually declines, reducing the cable's service life;

[0004] In addition, most cables use a simple wire core arrangement method, with the cores arranged closely together and almost no heat dissipation channel between the cores and the inner layer, resulting in heat concentration in the internal area of ​​the cable. Local overheating is very likely to occur, which seriously affects the cable's power transmission efficiency. Long-term high temperature conditions will also accelerate the aging of the core and insulation materials, greatly shortening the cable's service life. Summary of the invention

[0005] The object of the present invention is to provide a highly flexible electric vehicle charging column cable to solve the problems raised in the above background technology.

[0006] To achieve the above object, a highly flexible electric vehicle charging column cable is provided, comprising an outer layer, an insulating sleeve is arranged inside the outer layer, an inner layer is arranged inside the insulating sleeve, a plurality of wire cores are arranged inside the inner layer, a reinforcing core is arranged at a middle position inside the inner layer, a heat dissipation device is arranged between the inner wall of the inner layer and the outer wall of the reinforcing core, a protective device is arranged on the outer wall of the inner layer and the inner wall of the insulating sleeve, and the protective device is sleeved on the inner layer;

[0007] The heat dissipation device fixes the position of the wire core, and while fixing the wire core, separates several wire cores inside the inner layer. The heat dissipation device transfers the heat generated when the wire core works; when the outer layer rotates under torsion, the protection device rotates with the outer layer, and the rotating protection device moves the outer layer and the inner layer away from each other. At the same time, the protection device drives the outer layer to rotate inside the inner layer during the movement.

[0008] As a further improvement of this technical solution, the heat dissipation device includes several first connecting frames uniformly arrayed and fixed on the outer wall of the strengthening core. Several second connecting frames are uniformly arrayed and fixedly connected to the inner wall of the inner layer. A plurality of the wire cores are arranged inside the first connecting frames and the second connecting frames.

[0009] As a further improvement of this technical solution, the protection device includes an isolation sleeve fixedly sleeved on the outer wall of the inner layer. A plurality of elastic rings are arranged between the outer wall of the isolation sleeve and the inner wall of the insulating sleeve, and the plurality of elastic rings are circumferentially arrayed around the central axis of the isolation sleeve. One end of each of the plurality of elastic rings is fixedly connected to a pull bar, and one end of the pull bar is fixedly connected to the inner wall of the insulating sleeve.

[0010] As a further improvement of this technical solution, a pressure bar is fixedly connected to the end of the elastic ring away from the pull bar, and one end of the pressure bar is fixedly connected to the outer wall of the isolation sleeve, and the pressure bar and the pull bar are arranged in opposite directions.

[0011] As a further improvement of this technical solution, a pressure bar is fixedly connected to the end of the elastic ring away from the pull bar, and one end of the pressure bar is fixedly connected to the outer wall of the isolation sleeve, and the pressure bar and the pull bar are arranged in opposite directions. The first connecting frames and the second connecting frames are arranged in a staggered manner. The first connecting frames and the second connecting frames are used to separate a plurality of wire cores, and the plurality of wire cores do not contact each other.

[0012] As a further improvement of this technical solution, the pull bar and the pressure bar are arranged in an S shape. The pull bar is used to fit with the inner wall of the insulating sleeve when the elastic ring moves, and the pressure bar is used to fit with the outer wall of the isolation sleeve when the elastic ring moves.

[0013] As a further improvement of this technical solution, a plurality of elastic strips are fixedly arrayed on the outer wall of the isolation sleeve, and a reset piece is fixedly connected between every two elastic strips. The inner wall of the reset piece is fixedly connected to the elastic strips.

[0014] As a further improvement of this technical solution, a plurality of heat dissipation holes are formed on both the inner layer and the isolation sleeve, and the positions of the heat dissipation holes on the inner layer are aligned with the positions of the heat dissipation holes on the isolation sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention:

[0016] 1. In this highly flexible electric vehicle charging post cable, through the staggered layout of the first connecting frame and the second connecting frame, multiple wire cores in the inner layer are separated to form independent heat dissipation channels, promoting uniform heat dissipation and avoiding local overheating. The gaps between the wire cores and the inner layer, as well as the corresponding heat dissipation holes on the inner layer and the isolation sleeve, greatly expand the heat dissipation area, accelerate the heat dissipation to the inside and the surrounding environment of the insulating sleeve, effectively prevent heat accumulation inside the cable, significantly improve the heat dissipation efficiency of the wire cores, ensure the stable performance of the cable during high-load operation, and extend the service life of the cable.

[0017] 2. In this highly flexible electric vehicle charging post cable, a pulling force is applied to the elastic ring through the insulating sleeve to make it move, so that one side of the pull bar fits against the inner wall of the insulating sleeve, and one side of the pressure bar fits against the outer wall of the isolation sleeve, increasing the rotational resistance between the inner and outer layers of the cable. At the same time, when the outer layer rotates under torsion, a certain degree of relative rotation occurs between the outer layer and the inner layer, avoiding damage caused by the inner layer being twisted. When the torsion disappears, the relative rotation function between the inner and outer layers of the cable returns to its original position when not under force, effectively avoiding irreversible damage to the inner and outer layers of the cable due to the action of torsion, and improving the reliability and durability of the cable in a complex external force environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a schematic diagram of the outer layer structure of the present invention;

[0020] Figure 3 is a schematic diagram of the elastic ring structure of the present invention;

[0021] Figure 4 is a schematic diagram of the reset piece structure of the present invention;

[0022] Figure 5 is a schematic diagram of the isolation sleeve structure of the present invention;

[0023] Figure 6 is a schematic diagram of the protection device structure of the present invention;

[0024] Figure 7 is a schematic diagram of the inner layer structure of the present invention;

[0025] Figure 8 is a schematic cross-sectional view of the outer layer of the present invention;

[0026] Figure 9 is a schematic diagram of the elastic ring structure of the present invention.

[0027] The meanings of the various reference numerals in the figure are as follows:

[0028] 1. Outer layer; 11. Insulating sleeve; 12. Inner layer; 13. Reinforcing core; 15. Wire core;

[0029] 2. Heat dissipation device; 21. First connecting frame; 22. Second connecting frame; 24. Heat dissipation holes;

[0030] 3. Protection device; 31. Elastic ring; 32. Pulling bar; 33. Pressing bar; 34. Elastic strip; 35. Reset piece; 36. Isolation sleeve. Specific embodiments

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention 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 therefore should not be construed as a limitation to the present invention.

[0033] Please refer to Figures 1-8 As shown, the purpose of this embodiment is to provide a highly flexible electric vehicle charging column cable, including an outer layer 1. An insulating sleeve 11 is arranged inside the outer layer 1. An inner layer 12 is arranged inside the insulating sleeve 11. A plurality of wire cores 15 are arranged inside the inner layer 12. A strengthening core 13 is arranged at the middle position inside the inner layer 12. A heat dissipation device 2 is arranged between the inner wall of the inner layer 12 and the outer wall of the strengthening core 13. A protection device 3 is arranged between the outer wall of the inner layer 12 and the inner wall of the insulating sleeve 11, and the protection device 3 is sleeved on the inner layer 12;

[0034] The heat dissipation device 2 fixes the positions of the wire cores 15, and while fixing the wire cores 15, separates several wire cores 15 inside the inner layer 12. The heat dissipation device 2 transfers the heat generated when the wire cores 15 work; when the outer layer 1 is subjected to torsion and rotates, the protection device 3 rotates with the outer layer 1. The rotating protection device 3 makes the outer layer 1 and the inner layer 12 move away from each other, and at the same time, the protection device 3 drives the outer layer 1 to rotate inside the inner layer 12 during the movement.

[0035] Please refer to Figure 1 and Figure 8As shown in the figure, the heat dissipation device 2 includes a number of first connecting frames 21 fixedly arranged in a uniform array on the outer wall of the strengthening core 13. A number of second connecting frames 22 are fixedly connected in a uniform array on the inner wall of the inner layer 12. A plurality of wire cores 15 are arranged inside the first connecting frames 21 and the second connecting frames 22. Since heat is generated during the operation of the wire cores 15, the first connecting frames 21 and the second connecting frames 22 are arranged in a staggered manner to separate the plurality of wire cores 15, separating each of the plurality of wire cores 15 inside the inner layer 12 one by one, so that the plurality of wire cores 15 do not contact each other, and there is an independent heat dissipation channel around each wire core 15, enabling heat to be dissipated more evenly, avoiding local overheating, and making the temperature distribution inside the cable more balanced. The gap between the wire core 15 and the inner layer 12 greatly increases the heat dissipation area, enabling heat to be dissipated more quickly into the surrounding environment and preventing heat from accumulating inside the cable.

[0036] Please refer to Figure 5 and Figure 7 As shown in the figure, a number of heat dissipation holes 24 are provided on both the inner layer 12 and the isolation sleeve 36, and the positions of the heat dissipation holes 24 on the inner layer 12 are aligned with the positions of the heat dissipation holes 24 on the isolation sleeve 36. The heat inside the inner layer 12 can also be dissipated into the inside of the insulating sleeve 11 through the heat dissipation holes 24 on the inner layer 12 and the isolation sleeve 36, further improving the heat dissipation efficiency of the wire core 15.

[0037] Please refer to Figures 4-8 As shown in the figure, the protection device 3 includes an isolation sleeve 36 fixedly sleeved on the outer wall of the inner layer 12. A number of elastic rings 31 are provided between the outer wall of the isolation sleeve 36 and the inner wall of the insulating sleeve 11, and the number of elastic rings 31 is arranged in a circumferential array around the central axis of the isolation sleeve 36. One end of a number of elastic rings 31 is fixedly connected to a tension bar 32, and one end of the tension bar 32 is fixedly connected to the inner wall of the insulating sleeve 11. The end of the elastic ring 31 away from the tension bar 32 is fixedly connected to a pressure bar 33, and one end of the pressure bar 33 is fixedly connected to the outer wall of the isolation sleeve 36, and the pressure bar 33 and the tension bar 32 are arranged in opposite directions. The tension bar 32 and the pressure bar 33 are arranged in an S shape. The tension bar 32 is used to fit with the inner wall of the insulating sleeve 11 when the elastic ring 31 moves, and the pressure bar 33 is used to fit with the outer wall of the isolation sleeve 36 when the elastic ring 31 moves;

[0038] When the outer layer 1 is subjected to torsion, it rotates. The rotation of the outer layer 1 drives the insulating sleeve 11 to rotate. The insulating sleeve 11 exerts a pulling force on the elastic ring 31 to make it move. When the elastic ring 31 moves, the elastic ring 31 drives one side of the tie rod 32 to fit with the inner wall of the insulating sleeve 11, and one side of the pressure strip 33 fits with the outer wall of the isolation sleeve 36. At this time, the resistance to the rotation of the outer layer 1 and the inner layer 12 is greatly increased. The deformation of the tie rod 32 and the pressure strip 33 buffers the extrusion force to prevent the outer layer 1 from being damaged due to excessive distortion. At the same time, when the outer layer 1 is subjected to torsion and rotates, it can promote a certain degree of relative rotation between the outer layer 1 and the inner layer 12 to prevent the inner layer 12 from being damaged due to distortion. It can also exert a pulling force on the outer layer 1 to restore it, effectively preventing the outer layer 1 and the inner layer 12 from being damaged. In addition, the pressure strip 33 fits on the outer wall of the isolation sleeve 36, adding a layer of protection to the inner layer 12.

[0039] See also Figure 9 As shown, the pull rod 32 is provided with point a and point b, and the pressure strip 33 is provided with point c and point d. When the elastic ring 31 moves, the insulating sleeve 11 applies a downward force, so that the elastic ring 31 drives the pull rod 32 and the pressure strip 33 to move. When the pull rod 32 moves, point b first contacts the inner wall of the insulating sleeve 11. When the insulating sleeve 11 continues to apply pressure, point a then contacts the inner wall of the insulating sleeve 11. Similarly, when the pressure strip 33 moves, point c first contacts the outer wall of the isolation sleeve 36, and then point d contacts the isolation sleeve 36, thereby buffering different extrusion forces and avoiding damage caused by excessive distortion of the outer layer 1.

[0040] See also Figure 5 and Figure 8 As shown, a plurality of elastic strips 34 are fixed to the outer wall array of the isolation sleeve 36, and a reset plate 35 is fixedly connected between every two elastic strips 34. The inner wall of the reset plate 35 is fixedly connected to the elastic strip 34. When the torque disappears, the elastic strip 34 pulls the reset plate 35 to move. The elastic strip 34 is used to give the reset plate 35 a pulling force to pull the elastic ring 31 back when it moves, thereby achieving the effect that the outer layer 1 and the inner layer 12 can rotate relative to each other, and return to the original position when no force is applied, thereby avoiding damage to the outer layer 1 and the inner layer 12.

[0041] When the highly flexible electric vehicle charging column cable of the present invention is used, the multiple cores 15 inside the inner layer 12 are separated one by one by staggered arrangement between the No. 1 connecting frame 21 and the No. 2 connecting frame 22, and the multiple cores 15 are not in contact with each other, so that each core 15 has an independent heat dissipation channel around it, which can dissipate heat more evenly; and the gap between the core 15 and the inner layer 12 greatly increases the heat dissipation area, so that the heat can be dissipated to the surrounding environment more quickly, avoiding heat accumulation inside the cable, and the heat inside the inner layer 12 can also be dissipated to the inside of the insulating sleeve 11 through the heat dissipation holes 24 on the inner layer 12 and the isolation sleeve 36, further improving the heat dissipation efficiency of the core 15;

[0042] When the outer layer 1 is subjected to torsion, it rotates. When the outer layer 1 is subjected to torsion, it rotates. The insulating sleeve 11 applies a pulling force to the elastic ring 31 to make it move. The elastic ring 31 drives the pull rod 32 and the pressure strip 33 to move. When the elastic ring 31 moves to a certain position, one side of the pull rod 32 fits with the inner wall of the insulating sleeve 11, and one side of the pressure strip 33 fits with the outer wall of the isolation sleeve 36. At this time, the resistance to the rotation of the outer layer 1 and the inner layer 12 is greatly increased. The deformation of the pull rod 32 and the pressure strip 33 is used to buffer the extrusion force to prevent the outer layer 1 from being damaged due to excessive distortion. At the same time, when the outer layer 1 is subjected to torsion and rotates, the outer layer 1 and the inner layer 12 are prompted to have a certain degree of relative rotation to prevent the inner layer 12 from being damaged due to distortion. In addition, the pressure strip 33 fits on the outer wall of the isolation sleeve 36, adding a layer of protection to the inner layer 12.

[0043] When the torque disappears, the elastic strip 34 pulls the reset plate 35 to move. The elastic strip 34 is used to give a pulling force to the reset plate 35, so as to pull it back when the elastic ring 31 moves, thereby achieving the effect that the outer layer 1 and the inner layer 12 can rotate relative to each other, and return to the original position when no force is applied, thereby avoiding damage to the outer layer 1 and the inner layer 12.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A highly flexible electric vehicle charging column cable, comprising an outer layer (1), an insulating sleeve (11) is arranged inside the outer layer (1), an inner layer (12) is arranged inside the insulating sleeve (11), a plurality of wire cores (15) are arranged inside the inner layer (12), and a reinforcing core (13) is arranged at a middle position inside the inner layer (12), characterized in that: A heat dissipation device (2) is provided between the inner wall of the inner layer (12) and the outer wall of the reinforcing core (13); a protective device (3) is provided on the outer wall of the inner layer (12) and the inner wall of the insulating sleeve (11); and the protective device (3) is sleeved on the inner layer (12); The heat dissipation device (2) fixes the position of the wire core (15), and while fixing the wire core (15), separates a plurality of wire cores (15) inside the inner layer (12), and the heat dissipation device (2) transfers the heat generated by the wire core (15) when it is working; when the outer layer (1) is subjected to a torsional force and rotates, the protective device (3) rotates along with the outer layer (1), and the rotating protective device (3) causes the outer layer (1) and the inner layer (12) to move away from each other, and at the same time, the protective device (3) drives the outer layer (1) to rotate inside the inner layer (12) during the movement.

2. The highly flexible electric vehicle charging column cable according to claim 1 is characterized in that: The heat dissipation device (2) comprises a plurality of No. 1 connection frames (21) fixed in a uniform array on the outer wall of the reinforcing core (13); a plurality of No. 2 connection frames (22) are fixedly connected in a uniform array to the inner wall of the inner layer (12); and a plurality of the wire cores (15) are arranged inside the No. 1 connection frames (21) and the No. 2 connection frames (22).

3. The highly flexible electric vehicle charging column cable according to claim 2 is characterized in that: The protection device (3) comprises an isolation sleeve (36) fixedly mounted on the outer wall of the inner layer (12); a plurality of elastic rings (31) are arranged on the outer wall of the isolation sleeve (36) and the inner wall of the insulating sleeve (11); and the plurality of elastic rings (31) are arranged in a circular array around the central axis of the isolation sleeve (36); one end of the plurality of elastic rings (31) is fixedly connected to a pull rod (32); and one end of the pull rod (32) is fixedly connected to the inner wall of the insulating sleeve (11).

4. The highly flexible electric vehicle charging column cable according to claim 3 is characterized in that: One end of the elastic ring (31) away from the pull bar (32) is fixedly connected to a pressure bar (33), one end of the pressure bar (33) is fixedly connected to the outer wall of the isolation sleeve (36), and the pressure bar (33) and the pull bar (32) are arranged in opposite directions.

5. The highly flexible electric vehicle charging column cable according to claim 3 is characterized in that: One end of the elastic ring (31) away from the pull rod (32) is fixedly connected to a pressure strip (33), one end of the pressure strip (33) is fixedly connected to the outer wall of the isolation sleeve (36), and the pressure strip (33) and the pull rod (32) are arranged in opposite directions, and the No. 1 connecting frame (21) and the No. 2 connecting frame (22) are staggered, and the No. 1 connecting frame (21) and the No. 2 connecting frame (22) are used to separate multiple wire cores (15), and the multiple wire cores (15) do not contact each other.

6. The highly flexible electric vehicle charging column cable according to claim 3 is characterized in that: The pull strip (32) and the pressure strip (33) are arranged in an S shape. The pull strip (32) is used to fit the inner wall of the insulating sleeve (11) when the elastic ring (31) moves, and the pressure strip (33) is used to fit the outer wall of the isolation sleeve (36) when the elastic ring (31) moves.

7. The highly flexible electric vehicle charging column cable according to claim 3 is characterized in that: A plurality of elastic strips (34) are fixedly arranged in an array on the outer wall of the isolation sleeve (36), a reset sheet (35) is fixedly connected between every two elastic strips (34), and the inner wall of the reset sheet (35) is fixedly connected to the elastic strip (34).

8. The highly flexible electric vehicle charging column cable according to claim 3 is characterized in that: A plurality of heat dissipation holes (24) are provided on both the inner layer (12) and the isolation sleeve (36), and the positions of the heat dissipation holes (24) on the inner layer (12) are aligned with the positions of the heat dissipation holes (24) on the isolation sleeve (36).

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