Explosion-proof automatic charging docking device

Abstract

The application discloses a kind of explosion-proof automatic charging butt joint device, comprising: for burying underground installation mounting box, vertically set in mounting box flexible lifting mechanism, fixed in the male plug group of flexible lifting mechanism top, fixed in the female plug group of automatic transport equipment car disc bottom.The flexible lifting mechanism is set up up and down along vertical direction, it can bend to a side simultaneously.The male plug group is cooperatively arranged with female plug group, the male plug group is also connected with external power supply device, the male plug group is used to extend mounting box in the process of flexible lifting mechanism rising, and is guided to female plug group to accurately insert female plug group and realize butt joint charging.The automatic transport equipment is charged using the device of the application, can be directly charged in explosion-proof environment and automatically butt joint, so as to greatly improve the automation degree and charging efficiency of charging, make charging operation convenient, and the charging butt joint device of the application has certain tolerance capacity, facilitate the realization of scheme.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy vehicle charging, in particular, to an explosion-proof automatic charging docking device. BACKGROUND

[0002] Charging safety, charging time and charging convenience are three major factors affecting the charging experience of new energy vehicles. At present, automatic transportation equipment generally adopts the form of a robot body carrying an independent battery pack for power supply. For flammable and explosive environments with oil, gas, dust and chemical hazardous substances, the vehicle charging process must meet the requirements of national explosion-proof standards. Currently, the general form used in such environments is non-explosion-proof manual charging in a safe area, which greatly limits the automation level of automatic transportation equipment and affects work efficiency. Therefore, how to solve the self-charging of automatic transportation equipment in an explosion-proof environment is a problem that needs to be solved urgently.

[0003] Patent CN 108110869A discloses an explosion-proof automatic charging device for a wheel-type inspection robot. The horizontal sliding seat and vertical moving device can move the charging contact device horizontally and vertically, thereby realizing automatic charging of the inspection robot. However, in this scheme, accurate positioning of the robot charging end and high-precision motion control of the automatic charging device are required during the docking and charging process of the charging contact device and the inspection robot, which has certain threshold.

[0004] In the explosion-proof automatic charging device proposed in patent CN 109768608A, the robot body is configured with a socket part and a guide sleeve, and a guide rod is designed on the plug. During the plugging process of the plug and the socket, the guide rod and the guide sleeve are used to ensure the alignment of the plug part and the front end of the socket part. This method is simple to implement and has certain tolerance capability. However, in this scheme, the robot with the plug needs to move towards the socket part in a relatively correct posture during charging, otherwise the rigid structure of the plug part may be damaged, and the tolerance capability is limited.

[0005] In summary, for the automatic charging docking problem of automatic transportation equipment in explosive hazardous places, it is necessary to research an automatic docking and charging device that can realize the automatic docking of the plug and the socket within a certain tolerance range in an explosion-proof environment, and ensure the safety and reliability of the device and facilitate its implementation. SUMMARY

[0006] The present application provides an explosion-proof automatic charging docking device to solve the technical problems of the existing non-explosion-proof manual charging form in a safe area, which greatly limits the automation level of automatic transportation equipment and affects work efficiency, and the automatic charging method in an explosion-proof area, which requires accurate positioning of the robot charging end and high-precision motion control of the automatic charging device, has certain threshold, and is prone to damage the rigid structure of the plug part, and has limited tolerance capability.

[0007] The technical scheme adopted by the present application is as follows:

[0008] The explosion-proof automatic charging docking device comprises a mounting box for being embedded and installed underground, a flexible lifting mechanism vertically arranged in the mounting box, a male plug group fixed to the top end of the flexible lifting mechanism, and a female plug group fixed to the bottom of the disc of the automatic transportation equipment; the flexible lifting mechanism is arranged up and down in the vertical direction and can be bent to one side; the male plug group is arranged in cooperation with the female plug group, and the male plug group is connected with an external power supply device; the male plug group is used for extending out of the mounting box during the upward movement of the flexible lifting mechanism and is guided by the female plug group to accurately insert into the female plug group to realize docking and charging.

[0009] Further, the flexible lifting mechanism comprises a lead screw structure vertically arranged in the mounting box, a bearing table fixed to the top end of the lead screw structure, and a flexible coupling arranged on the bearing table; the male plug group is detachably fixed to the top end of the flexible coupling to enter and exit the import and export openings arranged at the top end of the mounting box under the lifting action of the lead screw mechanism.

[0010] Further, the mounting box comprises an outer box body, an intermediate partition plate horizontally arranged at the lower end of the outer box body, a bearing support fixed to the upper surface of the intermediate partition plate, and a plurality of guide columns vertically fixed between the intermediate partition plate and the top plate of the outer box body; the lead screw mechanism comprises a first driving motor fixed to the lower surface of the intermediate partition plate, a first coupling connected to the driving end of the first driving motor, a lead screw shaft vertically arranged and rotatably arranged at the lower end on the bearing support, and a connecting sleeve threadedly arranged on the outer circle of the lead screw shaft; the bearing table is slidably arranged on the plurality of guide columns, and the upper end of the connecting sleeve is fixed to the lower surface of the bearing table; the lower end of the lead screw shaft is connected to the first coupling, and the opposite upper end thereof extends into the connecting sleeve.

[0011] Further, the male plug group comprises a lower combination plate detachably fixed with the flexible coupling, a guide pin group and a male needle group vertically fixed to the lower combination plate; the female plug group comprises an upper combination plate for being fixed to the bottom of the disc of the automatic transportation equipment, a guide hole group arranged on the upper combination plate, and a female needle group arranged on the upper combination plate; the guide pin group is arranged in correspondence with the guide hole group to cooperate with the male needle group to accurately limit and guide the insertion of the male needle group into the female needle group; the male needle group and the female needle group are arranged in cooperation to charge the battery group fixed to the bottom of the disc after the male needle group is inserted into the female needle group.

[0012] Further, the guide pin group comprises a plurality of first guide pins vertically arranged and used for roughly limiting and guiding the insertion of the male needle group into the female needle group, and a plurality of second guide pins used for accurately limiting and guiding the insertion of the male needle group into the female needle group; the guide hole group comprises a plurality of first guide holes arranged through the upper combination plate and cooperating with the plurality of first guide pins one by one, and a plurality of second guide holes cooperating with the plurality of second guide pins one by one.

[0013] Further, the length of the first guide pin is greater than the length of the second guide pin, and the outer diameter of the first guide pin is greater than the outer diameter of the second guide pin; the first guide hole and the second guide hole are both trumpet-shaped holes.

[0014] Further, the explosion-proof automatic charging docking device further comprises an automatic locking and unlocking device, the automatic locking and unlocking device is arranged at the top end of the flexible lifting mechanism, and the male plug group is detachably fixed to the top end of the automatic locking and unlocking device; the automatic locking and unlocking device is used for tightly docking the male plug group with the female plug group during the charging process, so as to form a sealed explosion-proof cavity and thus ensure the charging safety.

[0015] Further, the automatic locking and unlocking device comprises a connecting box fixed to the top end of the flexible lifting mechanism, and a plurality of groups of automatic locking and unlocking mechanisms vertically arranged in the connecting box, each group of automatic locking and unlocking mechanisms comprising a rotary telescopic structure vertically arranged in the connecting box, and a connecting bolt detachably mounted at the top end of each rotary telescopic structure; the rotary telescopic structure is arranged in compression along the vertical direction, so that the connecting bolt vertically penetrates the bolt through hole arranged on the connecting box and the male plug group and abuts against the threaded hole arranged on the female plug group, and the rotary telescopic structure is further used for driving the connecting bolt to rotate, so that the connecting bolt continues to be screwed into the threaded hole, and thus the female plug group and the male plug group are tightly connected to form a sealed explosion-proof cavity.

[0016] Further, the rotary telescopic structure comprises a rotary driving assembly vertically fixed to the bottom plate of the connecting box, a spline shaft vertically connected to the driving end of the rotary driving assembly, a mounting sleeve fitted and sleeved on the outer circle of the spline shaft, and a compression spring arranged between the spline shaft and the mounting sleeve; the connecting bolt is vertically arranged at the top end of the mounting sleeve.

[0017] Further, the rotary driving assembly comprises a second driving motor fixed to the bottom plate of the connecting box, a speed reducer fixed to the driving end of the second driving motor, and a second coupling connected to the upper end of the speed reducer; the lower end of the spline shaft is fixed to the coupling, and the outer circle of the upper end of the spline shaft is provided with external splines; the lower end of the mounting sleeve is sleeved on the upper end of the spline shaft and connected with the spline shaft, and the upper end of the spline shaft is provided with an internally recessed hexagonal groove; the external hexagonal head of the lower end of the connecting bolt is fitted and arranged in the hexagonal groove.

[0018] The present application has the following beneficial effects:

[0019] When the explosion-proof automatic charging docking device is used to charge the automatic transportation equipment, the automatic transportation equipment does not need to be moved to a safe environment and manually charged by plugging, and the automatic transportation equipment can be directly charged in an explosion-proof environment and automatically docked, thereby greatly improving the automation degree and charging efficiency of the charging, and making the charging operation convenient; in addition, the flexible lifting mechanism can not only perform up-down lifting action, but also can be flexibly bent to one side, so that during the docking and insertion of the male plug group and the female plug group, the flexible lifting mechanism can be slightly bent to correct the deviation between the male plug group and the female plug group, thereby ensuring the smooth docking and charging process, so that the charging docking device has a certain tolerance capacity and is convenient for implementation.

[0020] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate the preferred embodiments of the application and assist in the explanation of the application. In the drawings:

[0022] Figure 1 is a space structure schematic diagram of the explosion-proof automatic charging docking device of the preferred embodiment of the present application;

[0023] Figure 2 is Figure 1 is a half cutaway schematic diagram of the explosion-proof automatic charging docking device in the

[0024] Figure 3 is Figure 1 is a corresponding schematic diagram of the male plug group and the female plug group in the

[0025] Figure 4 is Figure 1 is an explosion schematic diagram of the automatic locking and unlocking device in the

[0026] Figure 5 is a schematic diagram of the explosion-proof automatic charging docking device in the extended charging state of the preferred embodiment of the present application;

[0027] Figure 6 is Figure 1 is a schematic diagram of the automatic locking and unlocking device in the retracted state of the

[0028] Figure 7 is Figure 1 is a schematic diagram of the automatic locking and unlocking device in the locked state of the

[0029] LEGEND

[0030] 10, installation box; 101, import and export; 11, outer box body; 12, middle partition plate; 13, bearing support; 14, guide column; 15, limiting block; 20, flexible lifting mechanism; 21, screw structure; 211, first driving motor; 212, first coupling; 213, screw shaft; 214, connecting sleeve; 22, bearing table; 23, flexible coupling; 24, moving shaft sleeve; 30, male plug group; 31, lower combination plate; 32, guide pin group; 321, first level guide pin; 322, second level guide pin; 33, male needle head group; 34, bolt through hole; 40, female plug group; 41, upper combination plate; 42, guide hole group; 421, first level guide hole; 422, second level guide hole; 43, female needle head group; 44, threaded hole; 50, automatic locking and unlocking device; 51, connecting box; 52, automatic locking and unlocking mechanism; 521, second driving motor; 522, speed reducer; 523, second coupling; 524, spline shaft; 525, mounting sleeve; 526, compression spring; 527, connecting bolt. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the following.

[0032] Reference Figure 1 The preferred embodiment of the present application provides an explosion-proof automatic charging docking device, comprising: an installation box 10 for embedding and installing underground, a flexible lifting mechanism 20 vertically arranged in the installation box 10, a male plug group 30 fixed to the top end of the flexible lifting mechanism 20, and a female plug group 40 fixed to the bottom of the car disc of the automatic transportation equipment. The flexible lifting mechanism 20 is arranged to rise and fall in the vertical direction, and can be bent to one side. The male plug group 30 is arranged in cooperation with the female plug group 40, and the male plug group 30 is also connected with an external power supply device. The male plug group 30 is used to extend out of the installation box 10 during the upward movement of the flexible lifting mechanism 20, and is guided in cooperation with the female plug group 40 to accurately insert into the female plug group 40 to realize docking and charging.

[0033] The automatic charging docking step of the explosion-proof automatic charging docking device of the present application is as follows: first, the flexible lifting mechanism 20 extends upwards, driving the male plug group 30 to extend upwards to the top of the installation box 10 and partially contact the female plug group 40, as shown in Figure 5The process is shown; then, the flexible lifting mechanism 20 continues to extend upward, gradually realizing the cooperation and guiding process of the male plug group 30 and the female plug group 40, until the male plug group 30 and the female plug group 40 are completed docking and insertion. During the docking and insertion of the two, the flexible lifting mechanism 20 can be slightly bent to repair the deviation between the male plug group 30 and the female plug group 40, thereby ensuring the smooth docking and charging process; finally, power is turned on to charge the automatic transport equipment. After charging is completed, the flexible lifting mechanism 20 descends and retracts, driving the male plug group 30 and the female plug group 40 to disengage, and then retracting them into the installation box 10, thus completing this charging.

[0034] When the explosion-proof automatic charging docking device of the present invention is used to charge automatic transport equipment, the automatic transport equipment does not need to be moved to a safe environment and manually docked for charging. It can be directly docked and charged in an explosion-proof environment, thereby greatly improving the degree of automation and charging efficiency of charging, making the charging operation convenient; secondly, in addition to being able to move up and down, the flexible lifting mechanism 20 can also be flexibly set to be slightly bent to one side, so that during the docking and insertion process of the male plug group 30 and the female plug group 40, the flexible lifting mechanism 20 can be slightly bent to repair the deviation between the male plug group 30 and the female plug group 40, thereby ensuring that the docking and charging process proceeds smoothly. Therefore, the charging docking device of the present invention has a certain tolerance capability, which facilitates the implementation of the solution.

[0035] Alternatively, as Figure 2 As shown, the flexible lifting mechanism 20 includes a screw structure 21 vertically lifting and lowering inside the installation box 10, a support platform 22 fixed to the lifting top of the screw structure 21, and a flexible coupling 23 supported on the support platform 22. The male plug assembly 30 is detachably fixed to the top of the flexible coupling 23, so as to be used to enter and exit the inlet and outlet 101 opened at the top of the installation box 10 under the lifting action of the screw mechanism. In this optional solution, as Figure 2 As shown, the setting of the flexible coupling 23 allows the flexible lifting mechanism 20 to be slightly bent, so that the male plug group 30 can have a certain tolerance during the docking process with the female plug group 40. That is, when there is a certain deviation in the docking position of the automatic transport equipment equipped with the female plug group 40, the flexible coupling 23 provides the male plug group 30 with a certain amount of flexible bending during the docking guidance process, thereby ensuring that the male plug group 30 and the female plug group 40 can be smoothly docked and charged, thereby facilitating the realization of automatic docking.

[0036] In this option, if Figure 2As shown, the mounting box 10 comprises an outer box body 11, an intermediate partition plate 12 horizontally arranged at the lower end of the outer box body 11, a bearing support 13 fixed on the upper surface of the intermediate partition plate 12, and a plurality of guide columns 14 vertically fixed between the intermediate partition plate 12 and the top plate of the outer box body 11. The lead screw mechanism comprises a first driving motor 211 fixed on the lower surface of the intermediate partition plate 12, a first coupling 212 connected to the driving end of the first driving motor 211, a lead screw shaft 213 vertically arranged and rotatably arranged at the lower end of the bearing support 13, and a connecting sleeve 214 threadedly arranged on the outer circle of the lead screw shaft 213. The bearing table 22 is slidably arranged on the plurality of guide columns 14, and the upper end of the connecting sleeve 214 is fixed to the lower surface of the bearing table 22. The lower end of the lead screw shaft 213 is connected to the first coupling 212, and the opposite upper end extends into the connecting sleeve 214. In this alternative, the lifting of the bearing table 22 is guided by the plurality of guide columns 14, thereby improving the precision of the movement of the male plug group 30 and facilitating precise butt joint with the female plug group 40. During operation, the first driving motor 211 is started by using an explosion-proof servo motor, which drives the lead screw shaft 213 to rotate through the first coupling 212. When the lead screw shaft 213 rotates, it drives the connecting sleeve 214 to rise and fall, thereby synchronously lifting the bearing table 22, and further driving the flexible coupling 23 and the male plug group 30 to rise and fall, thereby realizing the butt joint and disengagement process of the male plug group 30 and the female plug group 40.

[0037] Preferably, as Figure 2 shown, the mounting box 10 further comprises a limiting block 15 fixed on the upper and lower ends of each guide column 14. The connection between the bearing table 22 and the guide column 14 is also provided with a moving shaft sleeve 24. The limiting block 15 is used to limit the movement range of the lead screw structure 21, preventing it from exceeding the range during movement.

[0038] Alternatively, as Figure 1 shown, the male plug group 30 comprises a lower combination plate 31 detachably fixed with the flexible coupling 23, a guide pin group 32 vertically fixed on the lower combination plate 31, and a male needle head group 33. The female plug group 40 comprises an upper combination plate 41 for fixing with the bottom of the car disc of the automatic transportation equipment, a guide hole group 42 opened on the upper combination plate 41, and a female needle head group 43 arranged on the upper combination plate 41. The guide pin group 32 and the guide hole group 42 are correspondingly arranged to cooperate with each other to accurately limit and guide the insertion of the male needle head group 33 into the female needle head group 43. The male needle head group 33 and the female needle head group 43 are arranged in cooperation to charge the battery group fixed on the bottom of the car disc after the male needle head group 33 is inserted into the female needle head group 43.

[0039] In this alternative, as Figure 3As shown, the guide pin assembly 32 includes a plurality of vertically arranged primary guide pins 321 for coarsely limiting the insertion of the male needle assembly 33 into the female needle assembly 43, and a secondary guide pin 322 for finely limiting the insertion of the male needle assembly 33 into the female needle assembly 43. The guide hole assembly 42 includes a plurality of primary guide holes 421 that are provided through the upper connecting plate 41 and cooperate with the plurality of primary guide pins 321, and a plurality of secondary guide holes 422 that cooperate with the plurality of secondary guide pins 322. During the charging docking process, the primary guide pins 321 and the primary guide holes 421 are first roughly docked. After the primary guide pins 321 are partially inserted into the primary guide holes 421, the secondary guide pins 322 begin to finely dock with the secondary guide holes 422. Under the combined action of the primary and secondary guides, the male needle assembly 33 and the female needle assembly 43 are docked and charged.

[0040] Preferably, if Figure 3 As shown, the length of the primary guide pin 321 is greater than that of the secondary guide pin 322, and the outer diameter of the primary guide pin 321 is greater than that of the secondary guide pin 322. This allows the primary guide pin 321 to initially roughly mate with the primary guide hole 421 during charging and docking. After the primary guide pin 321 has been inserted a quarter of its length, the secondary guide pin 322 then begins fine-docking with the secondary guide hole 422, thereby improving the precision and efficiency of the insertion and docking of the male and female needle assemblies 33 and 43. Both the primary and secondary guide holes 421 and 422 are trumpet-shaped. The trumpet-shaped holes also provide guidance when the primary guide pin 321 and the secondary guide pin 322 are inserted into the primary and secondary guide holes 422.

[0041] Alternatively, as Figure 1 As shown, the explosion-proof automatic charging docking device also includes an automatic locking and unlocking device 50, which is mounted on the top of the flexible lifting mechanism 20. The male plug assembly 30 is detachably fixed to the top of the automatic locking and unlocking device 50. The automatic locking and unlocking device 50 is used to tightly connect the male plug assembly 30 and the female plug assembly 40 during charging, forming a sealed explosion-proof chamber and thus ensuring charging safety.

[0042] In this option, if Figure 1 and Figure 4As shown, the automatic locking and unlocking device 50 comprises a connecting box 51 fixed to the top end of the flexible lifting mechanism 20, and a plurality of sets of automatic locking and unlocking mechanisms 52 vertically arranged in the connecting box 51. Each set of automatic locking and unlocking mechanisms 52 comprises a rotating telescopic structure vertically arranged in the connecting box 51, and a connecting bolt 527 detachably mounted at the top end of each rotating telescopic structure. The rotating telescopic structure is arranged in compression along the vertical direction, so that the connecting bolt 527 vertically penetrates the bolt through hole 34 of the connecting box 51 and the male plug group 30, and abuts against the threaded hole 44 arranged on the female plug group 40. The rotating telescopic structure is also used to drive the connecting bolt 527 to rotate, so that the connecting bolt 527 continues to be screwed into the threaded hole 44, thereby connecting the female plug group 40 and the male plug group 30 tightly to form a sealed explosion-proof chamber. In operation, after the male plug group 30 and the female plug group 40 are successfully connected, the connecting bolt 527 penetrates the bolt through hole 34 of the connecting box 51 and the male plug group 30 under the compression elastic force of the rotating telescopic structure, and abuts against the threaded hole 44 arranged on the female plug group 40. When the rotating telescopic structure rotates, it will drive the connecting bolt 527 to rotate, and then the connecting bolt 527 is automatically screwed into the threaded hole 44, realizing the connection of the male plug group 30 and the female plug group 40 to form a sealed explosion-proof chamber, thereby ensuring the safety of the charging process, as shown in Figure 6 and 7 the process.

[0043] In the specific embodiment of this optional solution, as shown in Figure 4 , the rotating telescopic structure comprises a rotating drive assembly vertically fixed to the bottom plate of the connecting box 51, a spline shaft 524 vertically connected to the driving end of the rotating drive assembly, a mounting sleeve 525 fitted and sleeved on the outer circle of the spline shaft 524, and a compression spring 526 arranged between the spline shaft 524 and the mounting sleeve 525. The connecting bolt 527 is vertically arranged at the top end of the mounting sleeve 525. In operation, the mounting sleeve 525 is abutted against the top plate of the connecting box 51 under the action of the compression spring 526, and then the connecting bolt 527 penetrates the bolt through hole 34 and abuts against the threaded hole 44 at the upper end. When the rotating drive assembly drives the spline shaft 524 to rotate, the spline shaft 524 drives the mounting sleeve 525 and the connecting bolt 527 to rotate. During the rotation of the connecting bolt 527, it is screwed into the threaded hole 44 upward, so that the lower combination plate 31 of the male plug group 30 and the upper combination plate 41 of the female plug group 40 are tightly combined to form a sealed explosion-proof chamber, thereby ensuring the safety of the charging process, as shown in Figure 6 the process.

[0044] Further, as shown in Figure 4As shown, the rotary drive assembly includes a second drive motor 521 fixed to the bottom plate of the connection box 51, a reducer 522 fixed to the upper drive end of the second drive motor 521, and a second coupling 523 connected to the upper end of the reducer 522. The lower end of a splined shaft 524 is fixed to the coupling, and the outer circumference of the upper end of the splined shaft 524 is provided with an external spline. The lower end of a mounting sleeve 525 is sleeved onto the upper end of the splined shaft 524 and spline-connected to the splined shaft 524. The upper end of the splined shaft 524 is provided with an inwardly concave internal hexagonal socket. The external hexagonal head at the lower end of the connecting bolt 527 fits within the internal hexagonal socket. The spline shaft 524 and the mounting sleeve 525 can transmit torque when in use and can be stretched and retracted in the length direction, thereby ensuring the locking and disengagement of the connecting bolt 527; the compression spring 526 is installed between the spline shaft 524 and the mounting sleeve 525. Through the stretchability and retractability of the compression spring 526, it is ensured that the automatic locking and unlocking device 50 has both the rising range required for locking and the descending range required for disengagement in the natural state.

[0045] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A flameproof automatic charging docking device, characterized in that: include: An installation box (10) for underground installation, a flexible lifting mechanism (20) vertically arranged in the installation box (10), a male plug assembly (30) fixed to the top of the flexible lifting mechanism (20), and a female plug assembly (40) fixed to the bottom of the vehicle chassis of the automatic transport equipment; The flexible lifting mechanism (20) is arranged to be lifted up and down in the vertical direction and can be bent toward one side; The male plug group (30) is arranged in conjunction with the female plug group (40), and the male plug group (30) is also connected to an external power supply device. The male plug group (30) is used to extend out of the installation box (10) during the ascending process of the flexible lifting mechanism (20), and cooperate with the female plug group (40) for guidance so as to accurately insert into the female plug group (40) to achieve docking and charging; The flexible lifting mechanism (20) includes a screw structure (21) vertically lifted and disposed in the installation box (10), a bearing platform (22) fixed to the lifting top end of the screw structure (21), and a flexible coupling (23) supported on the bearing platform (22); The male plug assembly (30) is detachably fixed to the top of the flexible coupling (23) so as to be used for entering and exiting the inlet and outlet (101) opened at the top of the installation box (10) under the lifting action of the screw mechanism; The mounting box (10) includes an outer box body (11), a middle partition (12) horizontally arranged at the lower end of the outer box body (11), a bearing support (13) fixed on the upper surface of the middle partition (12), and a plurality of guide columns (14) vertically fixed between the middle partition (12) and the upper top plate of the outer box body (11); The screw mechanism comprises a first drive motor (211) fixed on the lower surface of the middle partition (12), a first coupling (212) connected to the driving end of the first drive motor (211), a screw shaft (213) vertically arranged and with its lower end rotatably mounted on the bearing support (13), and a connecting sleeve (214) threadedly mounted on the outer circle of the screw shaft (213); The bearing platform (22) is mounted on a plurality of guide columns (14) in a sliding manner up and down, and the upper end of the connecting sleeve (214) is fixed to the lower surface of the bearing platform (22); The lower end of the screw shaft (213) is connected to the first coupling (212), and the opposite upper end thereof extends into the connecting sleeve (214); The male plug assembly (30) includes a lower coupling plate (31) detachably fixed to the flexible coupling (23), a guide pin assembly (32) vertically fixed to the lower coupling plate (31), and a male needle assembly (33); The female plug assembly (40) comprises an upper connecting plate (41) for fixing to the bottom of the vehicle disc of the automatic transport equipment, a guide hole assembly (42) provided on the upper connecting plate (41), and a female needle assembly (43) provided on the upper connecting plate (41); The guide pin group (32) and the guide hole group (42) are correspondingly arranged to cooperate with each other to accurately limit and guide the insertion of the male needle group (33) into the female needle group (43); The male needle assembly (33) and the female needle assembly (43) are arranged in cooperation so as to charge the battery assembly fixed to the bottom of the vehicle disc after the male needle assembly (33) is inserted into the female needle assembly (43).

2. The explosion-proof automatic charging docking device according to claim 1, characterized in that: The guide pin assembly (32) includes a plurality of vertically arranged first-level guide pins (321) for roughly guiding the male needle assembly (33) to be inserted into the female needle assembly (43), and a second-level guide pin (322) for precisely guiding the male needle assembly (33) to be inserted into the female needle assembly (43). The guide hole group (42) includes a plurality of primary guide holes (421) that are provided through the upper combining plate (41) and cooperate with the plurality of primary guide pins (321) one by one, and a plurality of secondary guide holes (422) that cooperate with the plurality of secondary guide pins (322) one by one.

3. The explosion-proof automatic charging docking device according to claim 2, characterized in that: The length of the primary guide pin (321) is greater than the length of the secondary guide pin (322), and the outer diameter of the primary guide pin (321) is greater than the outer diameter of the secondary guide pin (322); The primary guide hole (421) and the secondary guide hole (422) are both trumpet-shaped holes.

4. The explosion-proof automatic charging docking device according to claim 1, characterized in that: The explosion-proof automatic charging docking device further comprises an automatic locking and unlocking device (50), the automatic locking and unlocking device (50) being arranged at the top end of the flexible lifting mechanism (20), and the male plug assembly (30) being detachably fixed to the top end of the automatic locking and unlocking device (50); The automatic locking and unlocking device (50) is used to tightly connect the male plug assembly (30) and the female plug assembly (40) during the charging process, so as to form a sealed explosion-proof cavity and thereby ensure charging safety.

5. The explosion-proof automatic charging docking device according to claim 4, characterized in that: The automatic locking and unlocking device (50) includes a connection box (51) fixed to the top of the flexible lifting mechanism (20), and a plurality of automatic locking and unlocking mechanisms (52) vertically arranged in the connection box (51), each set of automatic locking and unlocking mechanisms (52) including a rotating telescopic structure vertically supported in the connection box (51), and a connecting bolt (527) detachably mounted on the top of each rotating telescopic structure; The rotary telescopic structure is compressed in the vertical direction so that the connecting bolt (527) vertically passes through the bolt through-hole (34) provided on the connecting box (51) and the male plug assembly (30) and then abuts against the threaded hole (44) provided on the female plug assembly (40). The rotary telescopic structure is also used to drive the connecting bolt to rotate so that the connecting bolt continues to be screwed upward into the threaded hole (44), thereby tightly connecting the female plug assembly (40) and the male plug assembly (30) to form a closed explosion-proof chamber.

6. The explosion-proof automatic charging docking device according to claim 5, characterized in that: The rotary telescopic structure comprises a rotary drive assembly vertically fixed on the bottom plate of the connection box (51), a spline shaft (524) vertically connected to the driving end of the rotary drive assembly, a mounting sleeve (525) fitted on the outer circle of the spline shaft (524), and a compression spring (526) installed between the spline shaft (524) and the mounting sleeve (525); The connecting bolt (527) is vertically mounted on the top end of the mounting sleeve (525).

7. The explosion-proof automatic charging docking device according to claim 6, characterized in that: The rotary drive assembly includes a second drive motor (521) fixed to the bottom plate of the connection box (51), a reducer (522) fixed to the upper drive end of the second drive motor (521), and a second coupling (523) connected to the upper end of the reducer (522); The lower end of the spline shaft (524) is fixed to the coupling, and an external spline is provided on the outer circle of the upper end of the spline shaft (524); The lower end of the mounting sleeve (525) is sleeved on the upper end of the spline shaft (524) and is spline-connected to the spline shaft (524). The upper end of the spline shaft (524) is provided with a concave inner hexagonal groove. The outer hexagonal head at the lower end of the connecting bolt (527) is fitted into the inner hexagonal groove.

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