A pre-assembled distribution box device for charging pile

Abstract

The present invention relates to the field of new energy technology, and in particular to a pre-assembled distribution box device for a charging pile, including a distribution box, a knife switch, a plurality of air switches and a plurality of electric energy meters, wherein the knife switch is fixedly connected to the top of the inner cavity of the distribution box, a plurality of the air switches are installed from left to right in the inner cavity of the distribution box, the air switch is located at the bottom of the knife switch and is electrically connected, a plurality of the electric energy meters are installed from left to right in the inner cavity of the distribution box, the electric energy meters correspond to the air switches one by one and are electrically connected, and the electric energy meters record the power consumption of the charging pile, and also include a plurality of anti-oxidation mechanisms and a plurality of anti-tension mechanisms, a plurality of the anti-oxidation mechanisms are installed in the inner cavity of the distribution box from left to right, and the anti-oxidation mechanisms correspond to the electric energy meters one by one. The power cord of the charging pile is protected, economic losses are reduced, power supply is stable, vacuum absorption of the junction box is achieved, oxidation of the power cord connector is prevented, and the use time of the charging pile is extended.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a pre-assembled distribution box device for a charging pile. Background Art

[0002] A charging pile is a device that replenishes electricity for electric vehicles. Its function is similar to that of a gas pump in a gas station. It can be fixed on the ground or on a wall and installed in public buildings (charging stations, shopping malls, public parking lots, etc.) and parking lots in residential areas. It can charge various types of electric vehicles according to the adjusted voltage and current. For private individuals installing charging piles in underground parking spaces, the power cord of the charging pile is pulled from the parking space to the distribution box, and the power cord is connected to the wiring terminals in the distribution box. In actual operation, the pulling distance is long, and unpredictable situations are inevitable. For example, the power cord cannot be fixed in the distribution box. Once the power cord is pulled by external force, it is easy to cause damage to the power cord or disconnection of the connector, resulting in high cost of use and unstable power supply. In addition, the air humidity in the underground garage is high, and the power cord connector oxidizes quickly, resulting in a decrease in power transmission efficiency and a short service life. Therefore, it is necessary to propose a pre-installed distribution box device for charging piles with high stability of use. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art that the power line cannot be protected and the power line connector is easily oxidized, the present invention provides a pre-assembled distribution box device for a charging pile.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a pre-installed distribution box device for a charging pile, comprising a distribution box, a knife switch, a plurality of air switches and a plurality of electric energy meters, wherein the knife switch is fixedly connected to the top of an inner cavity of the distribution box, and a plurality of the air switches are installed from left to right in the inner cavity of the distribution box, the air switch is located at the bottom of the knife switch and is electrically connected, and a plurality of the electric energy meters are installed from left to right in the inner cavity of the distribution box, the electric energy meters correspond one-to-one with the air switches and are electrically connected, and the electric energy meters record the power consumption of the charging piles, and the pre-installed distribution box device for the charging pile also comprises a plurality of anti-oxidation mechanisms and a plurality of anti-tensile mechanisms, wherein the plurality of the anti-oxidation mechanisms are installed from left to right in the inner cavity of the distribution box, and the anti-oxidation mechanisms correspond one-to-one with the electric energy meters, and the plurality of the anti-tensile mechanisms are installed at the bottom of the inner cavity of the distribution box from left to right, and the anti-tensile mechanisms correspond one-to-one with the anti-oxidation mechanisms.

[0005] Preferably, the anti-oxidation mechanism includes a junction box, a terminal, a sealing assembly, a cover plate and a vacuum suction assembly. The junction box is fixedly connected to the inner cavity of the distribution box, and the junction box is located at the bottom of the electric energy meter; the terminal is installed in the inner cavity of the junction box for connecting the power cord of the charging pile; there are two sealing assemblies, which are respectively fixedly connected to the upper and lower ends of the junction box; the cover plate is connected to the front of the junction box by screws, and a one-way valve is installed on the front of the cover plate; the vacuum suction assembly is screwed to the front end of the one-way valve.

[0006] Preferably, the anti-tension mechanism includes a buffer component and a positioning component, the buffer component is fixedly connected to the bottom of the inner cavity of the distribution box; the positioning component is installed on the top of the buffer component.

[0007] Preferably, the purpose is to seal the power cord, and the sealing assembly includes a pipe sleeve, a threaded groove, a sealing ring and a nut. The pipe sleeve is fixedly connected to the outer wall of the junction box, and the inner wall of the pipe sleeve is provided with a threaded groove; the sealing ring is inserted into the inner cavity of the threaded groove; the nut is screwed on the inner wall of the threaded groove, and by rotating the nut into the threaded groove, the nut can squeeze the sealing ring to expand inward.

[0008] Preferably, the purpose is to absorb the air in the junction box, make the junction box achieve vacuum, and prevent the power cord connector from oxidizing. The vacuum suction component includes a connector, an outer cover, a speed regulating box, a fan blade, a first gear, a first rotating shaft, a second gear and a crank. One end of the connector is screwed on the front end of the one-way valve; the outer cover is installed at the other end of the connector; the speed regulating box is fixedly connected to the right side wall of the outer cover; the fan blade is installed at the rear end of the left side wall of the speed regulating box through a bearing that can rotate around its own axis, and negative pressure is formed in the connector when the fan blade rotates; the first gear is installed at the right end of the fan blade; the first rotating shaft is installed at the front end of the right side wall of the speed regulating box through a bearing that can rotate around its own axis; the second gear is installed on the outer wall of the first rotating shaft, and the second gear is meshed with the first gear; the crank is installed at the right end of the first rotating shaft.

[0009] Preferably, the transmission ratio of the second gear to the first gear is less than 1.

[0010] Preferably, the purpose is to buffer the power cord to prevent the power cord from being torn off, and the buffer assembly includes a first cylinder, a second cylinder, an elbow, a spring, a first piston, hydraulic oil, a second piston and a lifting rod, the first cylinder is fixedly connected to the bottom of the inner cavity of the distribution box; the second cylinder is fixedly connected to the front of the first cylinder; the two ends of the elbow are respectively installed at the bottom of the first cylinder and the second cylinder, so that the first cylinder is connected to the second cylinder; the spring and the first piston are inserted into the inner cavity of the first cylinder from top to bottom, and the first piston is pushed down by the spring force; the hydraulic oil is filled in the inner cavity of the second cylinder; the second piston is inserted into the top of the inner cavity of the second cylinder so as to be able to slide up and down; the lifting rod is installed at the top of the second piston, and the lifting rod extends out of the upper surface of the second cylinder.

[0011] Preferably, the inner diameter of the elbow is smaller than the bottom width of the inner cavity of the second cylinder.

[0012] Preferably, the purpose is to position the power cord to prevent the power cord connector from being pulled and disconnected, and the positioning assembly includes a spool, a first dust cover, a slider, a clamp, a third shaft, a turntable, a guide groove, a pin, a third gear, a second dust cover, a screw and a rack, the spool is fixedly connected to the top of the right side wall of the lifting rod; the first dust cover is fixedly connected to the right side wall of the spool; the number of sliders is at least three, and they are equidistantly inserted into the side wall of the first dust cover along the circumferential direction; the clamp is installed on the outer edge of the left side wall of the slider, and the inner side of the clamp is arc-shaped; the third shaft is installed on the first dust cover through a bearing The third gear is installed at the right end of the third rotating shaft; the second dust cover is fixedly connected to the right side wall of the first dust cover; the screw is screwed on the lower surface of the second dust cover; the rack is installed at the top of the screw through a bearing, and the rack is meshed with the third gear. When the screw rotates clockwise or counterclockwise, the rack rises or falls, thereby causing the third gear to rotate clockwise or counterclockwise.

[0013] Preferably, the guide grooves are obliquely distributed on the outer wall of the turntable.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention reels the power cord of the charging pile through the spool, and the screw rotates clockwise. The turntable can rotate clockwise under the transmission of the rack and the third gear, and the guide groove squeezes the pin inward, so that the slider drives the clamping plate to move inward, and the clamping plate presses the power cord onto the spool to fix the power cord and prevent the power cord from being pulled. When an external force pulls the power cord, the lifting rod drives the second piston to descend. The hydraulic oil slowly enters the first cylinder due to the inner diameter of the elbow, and the spool slowly descends to buffer the power cord. Therefore, the power cord of the charging pile is protected, economic losses are reduced, and power is stable.

[0016] 2. The present invention can move the nut into the thread groove by screwing the nut, and the nut squeezes the sealing ring, which expands inward and presses against the outer skin of the power cord, thereby achieving sealing between the power cord and the junction box. The second gear is driven to rotate by the crank, and the fan blades rotate under the transmission of the second gear and the first gear, so that a negative pressure state is reached in the joint, the air in the junction box is absorbed, the junction box is vacuumed, oxidation of the power cord joint is prevented, and the use time of the charging pile is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the anti-oxidation mechanism of the present invention.

[0019] Figure 3 This is an exploded view of the sealing assembly of the present invention.

[0020] Figure 4 It is a top view of the vacuum suction component of the present invention.

[0021] Figure 5 It is a schematic diagram of the structure of the tensile mechanism of the present invention.

[0022] Figure 6 It is a left side cross-sectional view of the buffer assembly of the present invention.

[0023] Figure 7 It is a front cross-sectional view of the positioning component of the present invention.

[0024] Figure 8 It is the left view of the turntable of the present invention.

[0025] In the figure: 1, distribution box; 2, knife switch; 3, air switch; 4, electric energy meter; 5, anti-oxidation mechanism; 6, tensile mechanism; 51, junction box; 52, terminal; 53, sealing assembly; 54, cover; 55, vacuum assembly; 531, pipe sleeve; 532, thread groove; 533, sealing ring; 534, nut; 551, joint; 552, outer cover; 553, speed regulating box; 554, fan blade; 555, first gear; 556, first rotating shaft; 557, second gear; 558, crank; 61 , buffer assembly; 62, positioning assembly; 611, first cylinder; 612, second cylinder; 613, elbow; 614, spring; 615, first piston; 616, hydraulic oil; 617, second piston; 618, lifting rod; 621, spool; 622, first dust cover; 623, slider; 624, splint; 625, third rotating shaft; 626, turntable; 627, guide groove; 628, pin; 629, third gear; 6210, second dust cover; 6211, screw; 6212, rack. DETAILED DESCRIPTION

[0026] 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.

[0027] The present invention provides a technical solution: a pre-assembled distribution box device for a charging pile, such as Figure 1-Figure 8As shown, it includes a distribution box 1, a knife switch 2, a plurality of air switches 3 and a plurality of electric energy meters 4, the knife switch 2 is fixedly connected to the top of the inner cavity of the distribution box 1, a plurality of air switches 3 are equidistantly installed from left to right in the inner cavity of the distribution box 1, a plurality of electric energy meters 4 are equidistantly installed from left to right in the inner cavity of the distribution box 1, the electric energy meters 4 are located at the bottom of the air switch 3, the knife switch 2, the air switch 3 and the electric energy meters 4 are electrically connected, the air switch 3 can protect the charging pile, the electric energy meter 4 records the power consumption of the charging pile, a plurality of anti-oxidation mechanisms 5 are equidistantly installed from left to right in the inner cavity of the distribution box 1, and the electric energy meters 4 correspond to the anti-oxidation mechanisms 5 up and down, and a plurality of anti-tension mechanisms 6 are installed from left to right at the bottom of the inner cavity of the distribution box 1, and the anti-oxidation mechanisms 5 correspond to the anti-tension mechanisms 6 up and down;

[0028] The anti-oxidation mechanism 5 includes a junction box 51 fixedly connected to the inner cavity of the distribution box 1, and the junction box 51 is located at the bottom of the electric energy meter 4. The inner cavity of the junction box 51 is equipped with a terminal 52, and the top of the terminal 52 is electrically connected to the electric energy meter 4. The upper and lower ends of the junction box 51 are equipped with sealing components 53. The front of the junction box 51 is connected to a cover plate 54 by screws. A one-way valve is installed on the front of the cover plate 54, and a vacuum suction component 55 is screwed to the front end of the one-way valve.

[0029] The tension-resistant mechanism 6 includes a buffer component 61 and a positioning component 62 . The buffer component 61 is fixedly connected to the bottom of the inner cavity of the distribution box 1 , and the positioning component 62 is installed on the top of the buffer component 61 .

[0030] As a preferred embodiment, the sealing assembly 53 further includes a sleeve 531 installed on the outer wall of the junction box 51, a threaded groove 532 is provided on the inner wall of the sleeve 531, a sealing ring 533 is inserted into the inner cavity of the threaded groove 532, a nut 534 is threaded on the inner wall of the threaded groove 532, the sleeve 531, the sealing ring 533 and the nut 534 have the same inner diameters, which is convenient for the charging pile power cord to pass through. When the nut 534 rotates clockwise, the nut 534 gradually moves onto the threaded groove 532, and the nut 534 squeezes the sealing ring 533, causing the sealing ring 533 to expand inward, and the sealing ring 533 is pressed tightly against the outer skin of the charging pile power cord to seal the power cord and the junction box 51.

[0031] As a preferred embodiment, further, the vacuum suction component 55 includes a joint 551 screwed on the front end of the one-way valve, the end of the joint 551 away from the one-way valve is fixedly connected to an outer cover 552, the right side wall of the outer cover 552 is fixedly connected to a speed regulating box 553, and a fan blade 554 capable of rotating around its own axis is installed on the rear side of the left side wall of the speed regulating box 553 through a bearing. When the fan blade 554 rotates, wind force is generated to form a negative pressure in the joint 551, and a first gear 555 is installed on the right end of the fan blade 554. A first rotating shaft 556 capable of rotating around its own axis is installed on the front end of the right side wall of the speed regulating box 553 through a bearing, and a second gear 557 and a crank 558 are installed on the left and right ends of the first rotating shaft 556 respectively, and the second gear 557 is meshed with the first gear 555. The transmission ratio of the second gear 557 to the first gear 555 is less than 1. When the crank 558 drives the second gear 557 to rotate, the rotation of the fan blade 554 is accelerated.

[0032] As a preferred solution, further, the buffer assembly 61 includes a first cylinder 611 fixedly connected to the bottom of the inner cavity of the distribution box 1, the front of the first cylinder 611 is fixedly connected to the second cylinder 612, the first cylinder 611 and the bottom of the second cylinder 612 are connected through an elbow 613, the inner cavity of the first cylinder 611 is respectively plugged with a spring 614 and a first piston 615 from top to bottom, the first piston 615 is pushed downward by the elastic force of the spring 614, the inner cavity of the second cylinder 612 is filled with hydraulic oil 616, and the hydraulic oil is pushed to the second cylinder through the first piston 615. Hydraulic oil 616 is squeezed inside 612, and a second piston 617 that can slide up and down is inserted at the top of the inner cavity of the second cylinder 612. A lifting rod 618 is installed on the top of the second piston 617, and the top of the lifting rod 618 extends out of the upper surface of the second cylinder 612. The inner diameter of the elbow 613 is smaller than the bottom width of the inner cavity of the second cylinder 612. Due to the viscosity of the hydraulic oil 616 and the small inner diameter of the elbow 613, the hydraulic oil 616 in the second cylinder 612 slowly enters the elbow 613, and the second piston 617 slowly descends, so that the descent of the second piston 617 is buffered.

[0033] As a preferred solution, further, the positioning component 62 includes a spool 621 fixedly connected to the top of the right side wall of the lifting rod 618, the outer wall of the spool 621 is wound with the charging pile power line, the right side wall of the spool 621 is fixedly connected to a first dust cover 622, the side wall of the first dust cover 622 is equidistantly inserted with sliders 623 along the circumferential direction, the number of sliders 623 is at least three, the outer wall shape of the slider 623 is rectangular, to prevent the slider 623 from rotating, a splint 624 is installed on the outer edge of the left side wall of the slider 623, the inner side of the splint 624 is arc-shaped, to increase the contact area when the splint 624 clamps the outer wall of the charging pile power line, to improve the positioning effect, the center position of the right side wall of the first dust cover 622 is installed with a third rotating shaft 625 that can rotate around its own axis through a bearing, and a turntable 626 and a third gear 6 are installed on the left and right ends of the third rotating shaft 625 respectively. 29. The left side wall of the turntable 626 is provided with guide grooves 627 at equal intervals along the circumferential direction. One end of a pin 628 is installed on the inner side of the right side wall of the slider 623, and the other end of the pin 628 is inserted into the inner cavity of the guide groove 627. The right side wall of the first dust cover 622 is fixedly connected with the second dust cover 6210. The bottom of the second dust cover 6210 is screwed with a screw rod 6211. The top of the screw rod 6211 is provided with a rack 6212 meshing with the third gear 629 through a bearing. When the screw rod 6211 rotates clockwise or counterclockwise, the rack 6212 can rise or fall, thereby causing the third gear 629 to rotate clockwise or counterclockwise. The guide grooves 627 are obliquely distributed on the outer wall of the turntable 626. As the turntable 626 rotates clockwise or counterclockwise, the guide grooves 627 can squeeze the pin 628 inwards or outwards, thereby causing the slider 623 to move inwards or outwards.

[0034] Working principle:

[0035] Step 1: Wrap the power cord of the charging pile around the outer wall of the spool 621, leaving a certain length at one end, and then pass it through the sealing assembly 53 into the junction box 51, connect the power cord to the terminal 52, turn on the power of the charging pile, rotate the screw 6211 clockwise to move the rack 6212 downward, and then make the third gear 629 drive the turntable 626 to rotate clockwise, and the guide groove 627 squeezes the pin 628 inward, so that the slider 623 drives the clamping plate 624 to squeeze inward, until the clamping plate 624 presses the power cord against the outer wall of the spool 621, and the power cord is positioned;

[0036] Step 2: When an external force pulls the power cord, the lifting rod 618 is forced to descend, and the second piston 617 descends along the second cylinder 612. Since the inner diameter of the elbow 613 is small and the hydraulic oil 616 is viscous, the hydraulic oil 616 in the second cylinder 612 slowly enters the first cylinder 611, the first piston 615 moves upward and squeezes the spring 614, and the spool 621 slowly descends, buffering the power cord to prevent the power cord from being torn off.

[0037] When the power cord is not affected by external force, the spring 614 pushes the first piston 615 downward under its own elastic force, the hydraulic oil 616 enters the second cylinder 612, and the spool 621 rises back to the initial position, achieving repeated buffering of the power cord;

[0038] Step three, when protecting the power cord from oxidation, screw the nut 534 and move it into the thread groove 532. The nut 534 squeezes the sealing ring 533, and the sealing ring 533 expands inward until the sealing ring 533 is pressed tightly against the outer skin of the power cord, so that the junction box 51 and the power cord are sealed. The second gear 557 on the first rotating shaft 556 is driven to rotate by the crank 558, and then the fan blades 554 rotate to generate wind force, and negative pressure is formed in the connector 551. The connector 551 absorbs the air in the junction box 51, and the one-way valve prevents air from entering, so that the junction box 51 is vacuumed to prevent oxidation of the power cord connector.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-assembled distribution box device for a charging pile, comprising a distribution box (1), a knife switch (2), a plurality of air switches (3) and a plurality of electric energy meters (4), wherein the knife switch (2) is fixedly connected to the top of the inner cavity of the distribution box (1), a plurality of the air switches (3) are installed from left to right in the inner cavity of the distribution box (1), the air switch (3) is located at the bottom of the knife switch (2) and is electrically connected, a plurality of the electric energy meters (4) are installed from left to right in the inner cavity of the distribution box (1), the electric energy meters (4) correspond to the air switches (3) one by one and are electrically connected, and the electric energy meters (4) are used to record the power consumption of the charging pile, characterized in that: The pre-assembled distribution box device for the charging pile further comprises a plurality of anti-oxidation mechanisms (5) and a plurality of anti-tension mechanisms (6), wherein the plurality of anti-oxidation mechanisms (5) are installed from left to right in the inner cavity of the distribution box (1), and the anti-oxidation mechanisms (5) correspond one-to-one with the electric energy meters (4); and the plurality of anti-tension mechanisms (6) are installed from left to right at the bottom of the inner cavity of the distribution box (1), and the anti-tension mechanisms (6) correspond one-to-one with the anti-oxidation mechanisms (5); The anti-oxidation mechanism (5) comprises: A junction box (51) is fixedly connected to the inner cavity of the distribution box (1), and the junction box (51) is located at the bottom of the electric energy meter (4); A wiring terminal (52), installed in the inner cavity of the wiring box (51), and used for connecting a charging pile power line; Two sealing assemblies (53) are fixedly connected to the upper and lower ends of the junction box (51) respectively; A cover plate (54) connected to the front of the junction box (51) by means of screws, wherein a one-way valve is installed on the front of the cover plate (54); A vacuum suction component (55) screwed to the front end of the one-way valve; The tensile mechanism (6) comprises: A buffer assembly (61) fixedly connected to the bottom of the inner cavity of the distribution box (1); A positioning assembly (62) mounted on the top of the buffer assembly (61); The buffer component (61) comprises: A first cylinder (611) fixedly connected to the bottom of the inner cavity of the distribution box (1); A second cylinder (612) fixedly connected to the front side of the first cylinder (611); An elbow (613), both ends of which are respectively mounted on the bottom ends of the first cylinder (611) and the second cylinder (612), so that the first cylinder (611) and the second cylinder (612) are connected; The spring (614) and the first piston (615) are inserted into the inner cavity of the first cylinder (611) from top to bottom, and the first piston (615) is pushed downward by the elastic force of the spring (614); Hydraulic oil (616) is filled in the inner cavity of the second cylinder (612); A second piston (617) is inserted into the top end of the inner cavity of the second cylinder (612) so as to be able to slide up and down; A lifting rod (618) is mounted on the top of the second piston (617), and the lifting rod (618) extends out of the upper surface of the second cylinder (612).

2. A pre-assembled distribution box device for a charging pile according to claim 1, characterized in that: The sealing assembly (53) comprises: A pipe sleeve (531) is fixedly connected to the outer wall of the junction box (51), and a threaded groove (532) is formed on the inner wall of the pipe sleeve (531); A sealing ring (533) inserted into the inner cavity of the thread groove (532); The nut (534) is threaded onto the inner wall of the thread groove (532), and when the nut (534) is rotated into the thread groove (532), the nut (534) can squeeze the sealing ring (533) to expand inward.

3. A pre-assembled distribution box device for a charging pile according to claim 2, characterized in that: The vacuum suction component (55) comprises: A connector (551), one end of which is threadedly connected to the front end of the one-way valve; An outer cover (552) is mounted on the other end of the joint (551); A speed regulating box (553) fixedly connected to the right side wall of the outer cover (552); The fan blade (554) is mounted on the rear end of the left side wall of the speed regulating box (553) via a bearing so as to be rotatable around its own axis, and a negative pressure is formed in the joint (551) when the fan blade (554) rotates; A first gear (555) mounted on the right end of the fan blade (554); A first rotating shaft (556) is mounted on the front end of the right side wall of the speed regulating box (553) via a bearing so as to be rotatable around its own axis; A second gear (557) is mounted on the outer wall of the first rotating shaft (556), and the second gear (557) is meshingly connected with the first gear (555); A crank handle (558) is mounted on the right end of the first rotating shaft (556).

4. A pre-assembled distribution box device for a charging pile according to claim 3, characterized in that: The transmission ratio between the second gear (557) and the first gear (555) is less than 1.

5. A pre-assembled distribution box device for a charging pile according to claim 4, characterized in that: The inner diameter of the elbow (613) is smaller than the width of the bottom of the inner cavity of the second cylinder (612).

6. A pre-assembled distribution box device for a charging pile according to claim 1, characterized in that: The positioning component (62) comprises: A bobbin (621) is fixedly connected to the top end of the right side wall of the lifting rod (618); A first dust cover (622) fixedly connected to the right side wall of the spool (621); Slide blocks (623), the number of which is at least three and which are inserted into the side wall of the first dust cover (622) at equal intervals along the circumferential direction; A clamping plate (624) is mounted on the outer edge of the left side wall of the sliding block (623), and the inner side of the clamping plate (624) is arc-shaped; A third rotating shaft (625) is mounted at the center of the right side wall of the first dust cover (622) via a bearing; A rotating disk (626) is mounted on the left end of the third rotating shaft (625), and guide grooves (627) are formed on the left side wall of the rotating disk (626) at equal intervals along the circumferential direction; A pin (628), one end of which is mounted on the inner side of the right side wall of the slider (623) and the other end of which is inserted into the inner cavity of the guide groove (627); A third gear (629) mounted on the right end of the third rotating shaft (625); A second dust cover (6210) fixedly connected to the right side wall of the first dust cover (622); A screw rod (6211) is screwed onto the lower surface of the second dust cover (6210); The rack (6212) is mounted on the top of the screw (6211) via a bearing, and the rack (6212) is meshedly connected with the third gear (629). When the screw (6211) rotates clockwise or counterclockwise, the rack (6212) rises or falls, thereby causing the third gear (629) to rotate clockwise or counterclockwise.

7. A pre-assembled distribution box device for a charging pile according to claim 6, characterized in that: The guide grooves (627) are obliquely distributed on the outer wall of the rotating disk (626).

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