Charging pile for new energy automobile

Abstract

The invention relates to the technical field of new energy automobile charging equipment, and discloses a charging pile for a new energy automobile, the charging pile comprises a pile body, a charging cable and a cooling mechanism are arranged in the pile body, the charging cable comprises a charging cable sleeve, and the inner side of the charging cable sleeve is sleeved with a charging cable core, a first protective sleeve and a liquid outlet pipe; the first protective sleeve is arranged on the outer side of the charging wire core in a sleeving mode, a cooling channel used for cooling liquid circulation is formed between the first protective sleeve and the charging wire core, and the first protective sleeve is connected with the liquid outlet pipe through the liquid cooling wiring terminal. The reset spring is matched with the baffle to drive the sliding pipe to move, so that the sliding pipe drives the sliding contact rod to move relative to the conductive block in a transmission mode, when the charging cable does not need to provide the allowance length, the length of the charging cable, connected into a circuit, of the allowance length part is reduced, energy consumption is reduced, and cooling capacity needed in unit time is reduced; the lasting time of the liquid cooling effect is prolonged, and the charging efficiency of the charging pile is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicle charging equipment, and in particular to a charging pile for new energy vehicles. Background Art

[0002] As the penetration rate of new energy vehicles gradually increases, the demand for charging piles is also increasing. The existing liquid-cooled charging pile, namely the super charging pile, includes a pile body, which connects the charging gun to the power module through a liquid cooling cable. The liquid cooling cable includes a control core group, a charging core, a liquid cooling inlet pipe and a liquid cooling outlet pipe. The number of liquid cooling inlet pipes is set to two and they are respectively sleeved on the outside of the corresponding charging core. A channel for the circulation of coolant is formed between the charging core and the liquid cooling inlet pipe, so that the coolant enters the coolant inlet pipe from the cooling device through the wiring terminal of the charging core located at the pile body end, and then enters the coolant outlet pipe after passing through the wiring terminal of the charging core located at one end of the charging gun and flows back to the cooling device. The cooling device is composed of a cooling oil tank, an oil pump provides oil circulation power, and a heat exchanger is provided to cool the cooling oil. During the circulation of the cooling oil, the charging core is immersed in the coolant. The coolant is usually selected as dimethyl silicone oil with dielectric and insulating properties. The cooling liquid circulation dissipates heat from the charging cable and the gun head of the charging gun to ensure that the charging gun can operate at rated power.

[0003] However, during the use of traditional liquid-cooled charging piles, the parking positions of different users are at different distances from the charging piles. The charging cables of the charging piles usually have an adjustable margin, that is, the actual length can be used. Current flows through the part of the charging cable that is longer than required for charging, resulting in energy loss in this part, and the cooling of the entire cable always needs to be at the maximum value. After charging for a period of time, the temperature of the cooling oil rises and the cooling efficiency decreases. The cooling oil needs to dissipate the heat of the part of the charging cable that is longer than the required length, which makes the time node of the cooling oil temperature rise advanced, resulting in a decrease in the safe power of the subsequent charging gun, affecting the charging efficiency of subsequent cars. Summary of the invention

[0004] The present application proposes a charging pile for new energy vehicles, which has the advantages of reducing the unnecessary length of the current-carrying part of the charging cable and facilitating the extension and retraction of the liquid-cooled charging cable as needed, and is used to solve the problem of excessive consumption of cooling energy caused by the mismatch between the length of the current-carrying part of the charging cable and the actual charging needs.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a charging pile for new energy vehicles, including a pile body, a charging cable and a cooling mechanism are arranged in the pile body, the charging cable includes a charging cable cover, the inner side of the charging cable cover is covered with a charging core, a No. 1 protective cover and a liquid outlet pipe, the No. 1 protective cover is arranged on the outer side of the charging core and between the charging core to form a cooling channel for the circulation of coolant, the No. 1 protective cover is connected to the liquid outlet pipe through a liquid cooling terminal, a fixed cylinder is arranged in the pile body, a sliding contact rod is fixedly connected to one side of the charging core, a conductive block is fixedly arranged on one side of the fixed cylinder, and a liquid inlet pipe is fixedly connected to one side of the fixed cylinder.

[0006] The sliding contact rod is slidably sleeved on the inner side of the conductive block, a sliding tube for driving the sliding contact rod to move is fixedly connected to one side of the No. 1 protective cover, the sliding tube is slidably sleeved on the inner side of the fixed tube, an adjustment mechanism cooperating with the fixed tube is provided in the pile body, the adjustment mechanism can drive the sliding tube to move, and when the remaining length of the charging cable is needed, the sliding tube is driven to move to increase the distance between the charging cable core and the conductive block.

[0007] The beneficial effects of the present invention are as follows: The present application provides a charging pile for new energy vehicles. The sliding tube is driven to move by an adjusting mechanism, and the sliding tube transmission drives the sliding contact rod to move. When the user uses the charging gun and does not need to utilize the remaining length of the charging cable, the sliding contact rod is moved relative to the conductive block, thereby reducing the length of the sliding contact rod connecting the conductive block and the charging wire core. While allowing the charging cable to be retractable to avoid dragging and wear on the ground, the stroke of the entire charging wire core used for the charging part of the current is shortened, thereby reducing the heat generated by the charging cable and reducing energy loss. In addition, when the cooling capacity provided by the cooling mechanism is limited, the time that the coolant in the cooling mechanism remains at the rated temperature is extended, and the time that the charging cable is cooled by the coolant is extended, thereby achieving the effect of extending the operating time of the charging gun at the rated power, thereby improving the charging efficiency of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the pile body of the present invention; Figure 3 It is a structural schematic diagram of the transmission gear of the present invention; Figure 4 It is a structural schematic diagram of the liquid storage mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the liquid outlet pipe of the present invention; Figure 6 It is a schematic diagram of the structure cross section of the liquid storage mechanism of the present invention in the liquid extraction state; Figure 7 This is a cross-sectional view of the structure of the fixed cylinder of the present invention; Figure 8 For the present invention Figure 7 A magnified view of the structure in Figure 2.

[0009] In the figure: 1-pile body, 2-fixed cylinder, 3-sliding tube, 4-No. 1 protective cover, 5-liquid storage mechanism, 501-telescopic mechanism, 502-connecting plate, 503-liquid storage cylinder, 504-sliding rod, 505-sliding plug, 6-connecting cylinder, 7-liquid inlet pipe, 8-liquid outlet pipe, 9-No. 2 protective cover, 10-charging cable cover, 11-charging wire core, 12-baffle, 13-reset spring, 14-spring seat, 15-pressure sensor, 1 6-connecting terminal, 17-conductive block, 18-sliding contact rod, 19-rack, 20-transmission gear, 21-winding roller, 22-fixed shaft, 23-support rod, 24-support plate, 25-solenoid valve No. 1, 26-solenoid valve No. 2, 27-connecting pipe No. 1, 28-connecting pipe No. 2, 29-solenoid valve No. 3, 30-solenoid valve No. 4, 31-control line group, 32-fixed block No. 1, 33-fixed block No. 2, 34-guide roller. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] In the drawings provided in the specification, due to the relatively large proportions of the construction features, for example, the proportion between the charging cable and the pile body in the present invention is too large, it may be difficult to intuitively understand the specific structure or working principle of the present invention when reading the drawings. In order to more clearly show the details and features of the present invention, the proportions of some construction features and their accessories in the drawings of the specification of the present invention have been adjusted to facilitate intuitive understanding of the specific structure of the present invention.

[0012] Embodiment 1, as Figure 1-Figure 5 , Figure 7 and Figure 8A charging pile for new energy vehicles includes a pile body 1, a charging cable for connecting a charging gun and a cooling mechanism for providing cooling is arranged in the pile body 1, the cooling mechanism includes an oil pump and an oil tank for storing cooling oil, the charging cable includes a charging cable cover 10, the inner side of the charging cable cover 10 is covered with a charging core 11, a No. 1 protective cover 4, a liquid outlet pipe 8, a No. 2 protective cover 9 and a control line group 31, the number of the charging core 11 and the No. 1 protective cover 4 are both set to two and the liquid inlet pipe 7 is sleeved on the outer side of the corresponding charging core 11, and the No. 2 protective cover 9 is sleeved on the outer side of the liquid outlet pipe 8 and the control line group 31.

[0013] The control line group 31 connects the charging gun and the control mechanism of the charging pile. The No. 1 protective cover 4 and the No. 2 protective cover 9 are partially located on the inner side of the charging cable cover 10. A cooling channel for the circulation of coolant is formed between the No. 1 protective cover 4 and the charging core 11. One end of the charging core 11 is connected to the charging gun through a liquid cooling terminal. The No. 1 protective cover 4 is connected to the liquid outlet pipe 8 through the liquid cooling terminal. One end of the liquid outlet pipe 8 is connected to the oil tank of the cooling mechanism. When charging, the charging gun is locked on the charging interface of the new energy vehicle. The oil pump in the cooling mechanism in the charging pile pumps the cooling oil into the No. 1 protective cover 4 of the liquid inlet pipe 7. The cooling oil is preferably dimethyl silicone oil. After passing through the No. 1 protective cover 4, the cooling oil flows back from the liquid outlet pipe 8 to the oil tank of the cooling mechanism.

[0014] A fixed cylinder 2 is provided in the pile body 1, and the position of the fixed cylinder 2 is fixed relative to the pile body 1. The number of the fixed cylinders 2 is adapted to the number of the charging cores 11. A sliding contact rod 18 is fixedly connected to one side of the charging core 11. A conductive block 17 is fixedly provided on one side of the fixed cylinder 2. A liquid inlet pipe 7 is fixedly connected to one side of the fixed cylinder 2. One end of the liquid inlet pipe 7 is connected to the oil pump output end of the cooling mechanism. A connecting terminal 16 is fixedly provided on one side of the fixed cylinder 2. The connecting terminal 16 is used to connect the charging power module of the charging pile. The connecting terminal 16 is electrically connected to the conductive block 17. The sliding contact rod 18 is slidably sleeved on the inner side of the conductive block 17 for conductively connecting the charging core 11 and the conductive block 17.

[0015] One side of the first protective sleeve 4 is fixedly connected with a sliding tube 3 for driving the sliding contact rod 18 to move. The first protective sleeve 4 and the second protective sleeve 9 are both flexible sleeves. The sliding tube 3 is slidably sleeved on the inner side of the fixed cylinder 2. A sliding sealing mechanism is provided between the sliding tube 3 and the fixed cylinder 2. The sliding sealing mechanism can be provided as an O-ring. Figure 8 A No. 2 fixing block 33 is fixedly provided on one side of the sliding tube 3 located in the fixed cylinder 2. The No. 2 fixing block 33 is provided with a plurality of through holes for the circulation of the coolant. The No. 2 fixing block 33 is fixedly connected to the sliding contact rod 18. The diameter of the sliding tube 3 is adapted to the diameter of the No. 1 protective cover 4 to ensure that the coolant can circulate between the sliding tube 3 and the charging cable core 11.

[0016] When in use, the oil pump pumps cooling oil into the fixed cylinder 2 through the liquid inlet pipe 7, and the cooling oil enters between the sliding tube 3 and the charging core 11 through the through hole on the second fixed block 33, and then enters the cooling channel between the flexible No. 1 protective cover 4 and the charging core 11. When the user's parking position is close to the charging pile, the charging cable has a remaining length, and the sliding tube 3 is adjusted to slide toward the conductive block 17 relative to the fixed cylinder 2. The sliding tube 3 drives the second fixed block 33 to move, and the second fixed block 33 drives the sliding contact rod 18 to move. The sliding contact rod 18 slides relative to the conductive block 17 to reduce the length of the sliding contact rod 18 connected to the circuit, and the distance between the conductive block 17 and the charging core 11 is reduced, thereby reducing the length of the current flowing part of the entire charging cable, reducing the energy consumption of the charging cable, and reducing the heat generated by the charging cable, so that the cooling capacity of the cooling mechanism can prolong the duration of the temperature of the charging gun controlled within the rated range, thereby prolonging the duration of the charging gun being able to charge at the rated power, prolonging the time point of charging frequency reduction, and improving the overall charging efficiency of the charging pile.

[0017] A support rod 23 is fixedly connected to the bottom of the pile body 1, and the number of the support rods 23 matches the number of the No. 1 protective sleeve 4. A spring seat 14 is fixedly connected to the top of the support rod 23. The spring seat 14 is annular. The No. 1 protective sleeve 4 is arranged on the inner side of the spring seat 14 and can move relative to the spring seat 14. A baffle 12 is fixedly sleeved on one end of the sliding tube 3. A return spring 13 is fixedly connected to the top of the spring seat 14, and one end of the return spring 13 is fixedly connected to the baffle 12.

[0018] When the charging pile is idle, the reset spring 13 pushes the sliding tube 3 to move, and the sliding tube 3 drives the sliding contact rod 18 to move, so that the length of the sliding contact rod 18 connected to the circuit is reduced, and the sliding tube 3 drives the No. 1 protective cover 4 to move, and the No. 1 protective cover 4 drives the charging cable cover 10 to move, so that the charging cable is partially retracted into the charging pile. When taking it, it is used to hold the charging cable cover 10 and the charging gun to overcome the elastic force of the reset spring 13 to drag out the charging cable of the required length until the charging gun is locked on the charging interface of the new energy vehicle. The remaining part of the charging cable is located on the side of the conductive block 17 away from the charging core 11 and is not connected to the circuit. While reducing the unnecessary remaining length of the charging cable, the charging cable is kept in a tightened state, avoiding the charging cable from being loose on the ground and dragging with the ground during use to generate additional friction, thereby extending the service life of the charging cable.

[0019] The bottom of the pile body 1 is rotatably connected to a guide roller 34, see Figure 2A connecting cylinder 6 is fixedly connected to the top of the fixed cylinder 2, and the connecting cylinder 6 is fixedly connected to the pile body 1. A No. 1 fixed block 32 is fixedly provided on one side of the fixed cylinder 2, and the No. 1 fixed block 32 is fixedly connected to the conductive block 17. A through hole for cooling oil to pass through is opened on the No. 1 fixed block 32. The connecting cylinder 6 seals one end of the fixed cylinder 2, and the No. 1 fixed block 32 is sleeved on the outside of the sliding contact rod 18 to avoid additional wear of the sliding contact rod 18. The guide roller 34 provides a guide for the movement of the charging cable cover 10. A fixed shaft 22 is fixedly connected to one side of the pile body 1, and a transmission gear 20 is rotatably connected to one side of the fixed shaft 22 through a bearing. A winding roller 21 for winding up the No. 2 protective cover 9 is fixedly connected to one side of the transmission gear 20, and the winding roller 21 is coaxially connected to the transmission gear 20.

[0020] The No. 2 protective cover 9 passes through the axis of the winding roller 21 and is wound on the arc surface of the winding roller 21. A rack 19 is fixedly connected to one side of the baffle 12 for driving the transmission gear 20 to rotate. The rack 19 and the transmission gear 20 are meshed with each other. The movement of the baffle 12 drives the rack 19 to move, and the movement of the rack 19 drives the transmission gear 20 to rotate. The transmission gear 20 drives the winding roller 21 to rotate. The direction and linear speed of the rotation and winding of the No. 2 protective cover 9 of the winding roller 21 are respectively adapted to the moving direction and speed of the No. 1 protective cover 4. The winding roller 21 rotates and winds up the No. 2 protective cover 9 on the arc surface. The position of the No. 2 protective cover 9 located on one side of the winding roller 21 is fixed, so that the No. 2 protective cover 9 and the No. 1 protective cover 4 can maintain synchronous extension and contraction, thereby ensuring the telescopic stability of the entire charging cable.

[0021] Embodiment 2, as Figure 1-Figure 3 and Figure 7 On the basis of the first embodiment, a pressure sensor 15 for detecting the elastic force of the return spring 13 is fixedly arranged on the top of one of the two spring seats 14. When in use, the controller of the oil pump adjusts the motor speed of the oil pump according to the feedback value of the pressure sensor 15. The elastic force of the return spring 13 decreases, and the motor speed of the oil pump is controlled to decrease accordingly, that is, the circulation rate of the cooling oil is reduced. The pressure of the return spring 13 is reduced, that is, the length of the charging cable dragged by the user is reduced, the length of the sliding contact rod 18 connected to the circuit is reduced, and the heating length of the charging cable is reduced, that is, the heat generated by the charging cable is reduced, and the required cooling rate is reduced. By reducing the circulation speed of the cooling oil, the energy consumption of the oil pump and the noise generated during the operation of the oil pump are reduced, the user's experience is improved, and the wear of the oil pump is reduced.

[0022] Embodiment three, as Figure 2-Figure 7On the basis of the second embodiment, a support plate 24 is fixedly connected to the pile body 1 at a position close to the top, and a liquid storage mechanism 5 is arranged on one side of the support plate 24. The liquid storage mechanism 5 includes a liquid storage cylinder 503 and a telescopic mechanism 501. The number of liquid storage cylinders 503 matches the number of charging cable cores 11. A sliding plug 505 is slidably sleeved on the inner side of the liquid storage cylinder 503. The sliding plug 505 divides the cavity of the corresponding liquid storage cylinder 503 into an upper cavity and a lower cavity. Cooling oil is stored in the lower cavity. The top of the sliding plug 505 A sliding rod 504 is fixedly connected at the center, and a connecting plate 502 is fixedly connected to the top of the two sliding rods 504. The telescopic mechanism 501 is used to drive the connecting plate 502 to move. The telescopic mechanism 501 is configured as an electric push rod, and the output end of the electric push rod is fixedly connected to the connecting plate 502. A No. 1 connecting tube 27 is fixedly connected to the bottom of the liquid storage cylinder 503, and one end of the No. 1 connecting tube 27 is fixedly connected to the corresponding fixed cylinder 2. The No. 1 connecting tube 27 connects the lower cavity of the liquid storage cylinder 503 and the cavity of the fixed cylinder 2.

[0023] A No. 2 connecting pipe 28 is fixedly connected to the top of the liquid storage cylinder 503, one end of the No. 2 connecting pipe 28 is fixedly connected to the liquid outlet pipe 8, and the No. 2 connecting pipe 28 connects the liquid outlet pipe 8 with the upper cavity. A No. 3 solenoid valve 29 is fixedly provided on the body of the No. 1 connecting pipe 27, a No. 4 solenoid valve 30 is fixedly provided on the body of the No. 2 connecting pipe 28, a No. 2 solenoid valve 26 is fixedly provided on the body of the liquid outlet pipe 8, and a No. 1 solenoid valve 25 is fixedly provided on the body of the liquid inlet pipe 7. The No. 1 solenoid valve 25 and the No. 2 solenoid valve 26 are kept normally open, and the No. 3 solenoid valve 29 and the No. 4 solenoid valve 30 are kept normally closed. When charging is required, the No. 1 solenoid valve 25 and the No. 2 solenoid valve are closed first. Solenoid valve 26, and open solenoid valve No. 3 29 and solenoid valve No. 4 30, the electric push rod extends to drive the sliding plug 505 to move downward, so that the cooling oil in the charging cable located outside the pile body 1 enters into the upper cavity, and the cooling oil in the lower cavity is replenished into the charging cable, and the cooling oil that is difficult to be refrigerated due to the influence of the external environment of the pile body 1 is extracted, so as to prevent the un-refrigerated cooling oil from mixing into the fuel tank after charging starts, resulting in a decrease in the cold storage capacity of the fuel tank, thereby ensuring the cold capacity of the fuel tank, further extending the overall heating time point of the cooling oil in the fuel tank, and keeping the cooling oil at the rated temperature for a longer time to cool the charging cable, thereby ensuring the operating power of the charging cable.

[0024] Then drag the charging cable, open solenoid valve No. 1 25 and solenoid valve No. 2 26, and close solenoid valve No. 3 29 and solenoid valve No. 4 30 to circulate the coolant. After the charging gun is charged, control the opening and closing of solenoid valve No. 1 26, solenoid valve No. 3 29 and solenoid valve No. 4 30 and cooperate with the liquid storage mechanism 5 to make the unfilled cold oil stored in the liquid storage cylinder 503 return to the charging cable to avoid the loss of oil support and deformation of the No. 1 protective cover 4. The liquid storage mechanism 5 extracts the unfilled cold oil in the contracted state of the charging cable. At the same time, it ensures that the extraction amount is compatible with the amount of unfilled cold oil in the charging cable outside the pile body 1 without affecting the extension and contraction.

[0025] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A charging pile for a new energy vehicle, comprising a pile body (1), wherein a charging cable and a cooling mechanism are arranged inside the pile body (1), wherein the charging cable comprises a charging cable sleeve (10), characterized in that: The inner side of the charging cable sheath (10) is provided with a charging core (11), a No. 1 protective sheath (4) and a liquid outlet pipe (8); the No. 1 protective sheath (4) is sheathed on the outer side of the charging core (11) and between the charging core (11) to form a cooling channel for the circulation of coolant; the No. 1 protective sheath (4) is connected to the liquid outlet pipe (8) via a liquid cooling terminal; a fixing cylinder (2) is provided in the pile body (1); a sliding contact rod (18) is fixedly connected to one side of the charging core (11); a conductive block (17) is fixedly provided in one side of the fixing cylinder (2); and a liquid inlet pipe (7) is fixedly connected to one side of the fixing cylinder (2); The sliding contact rod (18) is slidably sleeved on the inner side of the conductive block (17); a sliding tube (3) for driving the sliding contact rod (18) to move is fixedly connected to one side of the first protective cover (4); the sliding tube (3) is slidably sleeved on the inner side of the fixed tube (2); an adjustment mechanism cooperating with the fixed tube (2) is provided in the pile body (1); the adjustment mechanism can drive the sliding tube (3) to move, and when the remaining length of the charging cable is needed, the sliding tube (3) is driven to move to increase the distance between the charging cable core (11) and the conductive block (17); A connection terminal (16) is fixedly provided on one side of the fixed cylinder (2), and the connection terminal (16) is electrically connected to the conductive block (17).

2. A charging pile for new energy vehicles according to claim 1, characterized in that: The number of the charging cable cores (11) and the number one protective cover (4) are both set to two, and the number of the fixing cylinders (2) matches the number of the charging cable cores (11).

3. A charging pile for new energy vehicles according to claim 1, characterized in that: The adjustment mechanism comprises a support rod (23), the support rod (23) being fixedly connected to the pile body (1), the top of the support rod (23) being fixedly connected to a spring seat (14), one end of the sliding tube (3) being fixedly sleeved with a baffle (12), the top of the spring seat (14) being fixedly connected to a return spring (13), one end of the return spring (13) being fixedly connected to the baffle (12), and a second fixed block (33) being fixedly provided on one side of the sliding tube (3) located in the fixed cylinder (2), and the second fixed block (33) being fixedly connected to the sliding contact rod (18).

4. A charging pile for new energy vehicles according to claim 3, characterized in that: The regulating mechanism further comprises a pressure sensor (15), wherein the pressure sensor (15) is fixedly arranged on the top of the spring seat (14) and is used to detect the magnitude of the elastic force of the return spring (13). The cooling mechanism adjusts the cooling liquid circulation rate according to the feedback value of the pressure sensor (15) through a controller. When the elastic force of the return spring (13) decreases, the cooling liquid circulation rate pumped into the cooling mechanism decreases.

5. A charging pile for new energy vehicles according to claim 3, characterized in that: The inner side of the charging cable sleeve (10) is also sleeved with a second protective sleeve (9) and a control line group (31); one side of the pile body (1) is fixedly connected to a fixed shaft (22); one side of the fixed shaft (22) is coaxially rotatably connected to a transmission gear (20); one side of the transmission gear (20) is fixedly connected to a winding roller (21) for winding up the second protective sleeve (9); A rack (19) for driving the transmission gear (20) to rotate is fixedly connected to one side of the baffle (12); the rack (19) and the transmission gear (20) are meshed with each other; the direction and linear speed of the winding roller (21) for winding up the second protective cover (9) are respectively adapted to the moving direction and speed of the first protective cover (4).

6. A charging pile for new energy vehicles according to claim 1, characterized in that: A support plate (24) is fixedly connected inside the pile body (1) and at a position close to the top; a liquid storage mechanism (5) is provided on one side of the support plate (24); the liquid storage mechanism (5) comprises a liquid storage cylinder (503) and a telescopic mechanism (501); the number of the liquid storage cylinders (503) matches the number of charging cable cores (11); a sliding plug (505) is slidably sleeved on the inner side of the liquid storage cylinder (503); the sliding plug (505) divides the cavity of the corresponding liquid storage cylinder (503) into an upper cavity and a lower cavity; A sliding rod (504) is fixedly connected to the top center of the sliding plug (505), a connecting plate (502) is fixedly connected to the output end of the telescopic mechanism (501), the sliding rod (504) is fixedly connected to the connecting plate (502), and the telescopic mechanism (501) is used to drive the connecting plate (502) to move.

7. A charging pile for new energy vehicles according to claim 6, characterized in that: The liquid storage mechanism (5) further comprises a No. 1 connecting pipe (27), wherein the No. 1 connecting pipe (27) is connected to the lower cavity of the liquid storage cylinder (503) and the corresponding cavity of the fixed cylinder (2), and a No. 2 connecting pipe (28) is fixedly connected to the top of the liquid storage cylinder (503), and one end of the No. 2 connecting pipe (28) is fixedly connected to the liquid outlet pipe (8); The No. 2 connecting pipe (28) is connected to the liquid outlet pipe (8) and the upper cavity; the No. 3 solenoid valve (29) is fixedly provided on the tube body of the No. 1 connecting pipe (27); the No. 4 solenoid valve (30) is fixedly provided on the tube body of the No. 2 connecting pipe (28); the No. 2 solenoid valve (26) is fixedly provided on the tube body of the liquid outlet pipe (8); the No. 1 solenoid valve (25) is fixedly provided on the tube body of the liquid inlet pipe (7); and cooling oil is stored in the lower cavity.

8. A charging pile for new energy vehicles according to claim 1, characterized in that: The bottom of the pile body (1) is rotatably connected to a guide roller (34), the top of the fixed cylinder (2) is fixedly connected to a connecting cylinder (6), the connecting cylinder (6) is fixedly connected to the pile body (1), and a first fixing block (32) is fixedly provided on one side of the fixed cylinder (2), the first fixing block (32) is fixedly connected to a conductive block (17).

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