A charging gun plugging and unplugging force test device

Abstract

The present invention discloses a charging gun plugging force testing device, which relates to the technical field of electric vehicle detection. It includes a support unit, which includes a slider, a pair of brackets arranged on the upper surface of the slider, a hinge rod penetrating through the top of the brackets, a connecting platform arranged between the brackets, a guide rod arranged on one side of the brackets, and a supporting component arranged at the end of the guide rod. The beneficial effect of the present invention is that it can solve the problems of adaptability and accuracy in the plugging force testing of electric vehicle charging guns. It realizes multi-level reinforcement of charging guns with different shapes and sizes, simplifies the installation and removal process of charging guns, takes into account the comfort of operation, and ensures the fixing effect during the testing process.

Description

Technical Field

[0001] The present invention relates to the technical field of tram detection, and particularly to a charging gun plugging force testing device. Background Art

[0002] The charging gun plugging force test is a crucial link in evaluating the safety and reliability of electric vehicle charging equipment. It ensures that the charging gun is both firm and easy to operate during plugging and unplugging, preventing accidental detachment or damage during charging, thereby safeguarding user safety. In addition, this test also verifies the durability of the charging gun by simulating real usage conditions, ensures that its long-term repeated use does not affect performance, improves charging efficiency, and at the same time helps manufacturers improve the overall quality of products and meet industry standards.

[0003] During the test experiment process, although the charging guns are similar in shape, there are differences in actual dimensions, and this difference cannot be fully adapted to different charging guns for the experimental equipment. Existing equipment usually holds the charging gun or socket to test the magnitude of the plugging force. For different charging guns, a single fixture obviously cannot meet the installation of various models of charging guns, causing the charging gun to loosen or fail to align with the socket during plugging and unplugging, resulting in the test not being able to proceed smoothly and even affecting the accuracy of the test results. Summary of the Invention

[0004] In view of the problems existing in the above or the prior art, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a charging gun plugging force testing device, which can solve the problem that existing testing equipment cannot effectively adapt to various charging guns when there are differences in the sizes of charging guns, resulting in the charging gun being loose or unable to accurately align with the socket during the test process, making the test difficult to proceed smoothly and also affecting the accuracy of the test results.

[0006] To solve the above technical problems, the present invention provides the following technical solution: A charging gun plugging force testing device, which includes a support unit, including a slider, a pair of brackets arranged on the upper surface of the slider, a hinge rod penetrating through the top of the brackets, a connecting platform arranged between the brackets, a guide rod arranged on one side of the brackets, and a supporting component arranged at the end of the guide rod;

[0007] A pre-tightening unit, hinged to the hinge rod, the pre-tightening unit includes a snap ring, a clamping block penetrating through the outer wall of the snap ring, a pushing member arranged at the bottom of the snap ring, and a first spring arranged on the outer wall of the pushing member;

[0008] The fastening unit includes a first receiving cylinder provided at the bottom of the pushing member, a roller provided at the bottom of the first receiving cylinder, a second spring provided inside the first receiving cylinder, a lifting assembly provided below the roller, and a locking assembly provided on one side of the connecting platform.

[0009] As a preferred solution of the charging gun plugging and unplugging force testing device of the present invention, wherein: the slider includes a positioning hole penetrating through its bottom;

[0010] The bracket includes a limiting window penetrating through one side thereof;

[0011] The supporting assembly includes a bracket and a third spring provided inside the bracket; the bracket is sleeved on the top of the guide rod;

[0012] The bracket includes a second receiving cylinder provided at its bottom.

[0013] As a preferred solution of the charging gun plugging and unplugging force testing device of the present invention, wherein: the snap ring includes a limiting piece provided on its end face, a stationary block provided on the inner wall of the snap ring, a hinge plate provided on the outer wall of the snap ring, a third receiving cylinder provided at the bottom of the hinge plate, and a pair of movable grooves provided on the outer wall of the third receiving cylinder.

[0014] As a preferred solution of the charging gun plugging and unplugging force testing device of the present invention, wherein: the clamping block includes a tail rod provided on one side thereof;

[0015] The pushing member includes a top circular block, pushing rods provided on both sides of the top circular block, an extension rod provided at the lower end of the top circular block, a bottom circular block provided at the lower end of the extension rod, and limiting grooves provided on both sides of the bottom circular block; the pushing rod penetrates through the tail rod.

[0016] As a preferred solution of the charging gun plugging and unplugging force testing device of the present invention, wherein: the first receiving cylinder includes a pair of limiting strips provided on its inner wall.

[0017] As a preferred solution of the charging gun plugging and unplugging force testing device of the present invention, wherein: the lifting assembly includes an arc-shaped plate and an adjusting screw rod provided on one side of the arc-shaped plate;

[0018] The arc-shaped plate includes a guide hole penetrating through its higher end and a threaded cylinder provided at the other end of the arc-shaped plate;

[0019] The adjusting screw rod includes a rolling column provided at one end thereof; one end of the adjusting screw rod is inserted into the positioning hole and the other end penetrates through the connecting platform.

[0020] As a preferred embodiment of the charging gun plugging and unplugging force testing device of the present invention, wherein: the locking assembly includes a guiding column arranged on the side wall of the bracket, a locking block sleeved on the outer wall of the guiding column, and a fourth spring arranged on the outer wall of the guiding column.

[0021] As a preferred embodiment of the charging gun plugging and unplugging force testing device of the present invention, wherein: the locking block includes a fourth receiving cylinder arranged on one side thereof, an anti-deflection groove arranged on the other side of the locking block, and an inclined surface arranged at the end of the locking block.

[0022] Advantages of the present invention: The present invention can solve the problems of adaptability and accuracy in the plugging and unplugging force testing of electric vehicle charging guns. It realizes multi-stage reinforcement of charging guns with different shapes and sizes, simplifies the installation and removal process of charging guns, takes into account the comfort of operation, and ensures the fixing effect during the testing process. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a three-dimensional view of the whole of the present invention.

[0025] Figure 2 It is a structural view of the support unit of the present invention.

[0026] Figure 3 It is a structural view of the pre-tightening unit of the present invention.

[0027] Figure 4 It is a top view of the overall structure of the present invention.

[0028] Figure 5 For the present invention Figure 4 Full sectional view A-A.

[0029] Figure 6 For the present invention Figure 4 Full sectional view B-B. Detailed Embodiments

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will provide a detailed description of the specific embodiments of the present invention in conjunction with the drawings in the specification.

[0031] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways different from those described herein. Persons skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0032] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or selectively exclusive embodiments from other embodiments. Embodiment 1

[0033] Referring to Figures 1 to 6 , which is the first embodiment of the present invention. This embodiment provides a charging gun insertion and extraction force testing device, which includes a support unit 1, including a slider 11, a pair of brackets 12 provided on the upper surface of the slider 11, a hinge rod 13 penetrating through the top of the brackets 12, a connecting platform 14 provided between the brackets 12, a guide rod 15 provided on one side of the brackets 12, and a supporting component 16 provided at the end of the guide rod 15;

[0034] A pre-tightening unit 2, hinged to the hinge rod 13. The pre-tightening unit 2 includes a snap ring 21, a clamping block 22 penetrating through the outer wall of the snap ring 21, a pushing member 23 provided at the bottom of the snap ring 21, and a first spring 24 provided on the outer wall of the pushing member 23;

[0035] A fastening unit 3, including a first receiving cylinder 31 provided at the bottom of the pushing member 23, a roller 32 provided at the bottom of the first receiving cylinder 31, a second spring 33 provided inside the first receiving cylinder 31, a lifting component 34 provided below the roller 32, and a locking component 35 provided on one side of the connecting platform 14.

[0036] Furthermore, the slider 11 includes a positioning hole 111 penetrating through its bottom; the bracket 12 includes a limiting window 121 penetrating through one side thereof;

[0037] The supporting component 16 includes a bracket 161, and a third spring 162 provided inside the bracket 161; the bracket 161 is sleeved on the top of the guide rod 15;

[0038] The bracket 161 includes a second receiving cylinder 1611 provided at its bottom.

[0039] Furthermore, the snap ring 21 includes a limiting piece 211 provided on its end face, a stationary block 212 provided on the inner wall of the snap ring 21, a hinge plate 213 provided on the outer wall of the snap ring 21, a third receiving cylinder 214 provided at the bottom of the hinge plate 213, and a pair of movable grooves 215 provided on the outer wall of the third receiving cylinder 214.

[0040] Further, the clamping block 22 includes a tail rod 221 disposed on one side thereof.

[0041] The pushing member 23 includes a top circular block 231, pushing rods 232 disposed on both sides of the top circular block 231, an extension rod 233 disposed at the lower end of the top circular block 231, a bottom circular block 234 disposed at the lower end of the extension rod 233, and limiting grooves 235 disposed on both sides of the bottom circular block 234; the pushing rods 232 penetrate through the tail rod 221.

[0042] Further, the first receiving cylinder 31 includes a pair of limiting strips 312 disposed on its inner wall.

[0043] Further, the lifting assembly 34 includes an arc-shaped plate 341 and an adjusting screw rod 342 disposed on one side of the arc-shaped plate 341.

[0044] The arc-shaped plate 341 includes a guide hole 3411 penetrating through its higher end and a threaded cylinder 3412 disposed at the other end of the arc-shaped plate 341.

[0045] The adjusting screw rod 342 includes a rolling column 3421 disposed at one end thereof; one end of the adjusting screw rod 342 is inserted into the positioning hole 111, and the other end penetrates through the connecting platform 14.

[0046] Further, the locking assembly 35 includes a guide post 351 disposed on the side wall of the bracket 12, a locking block 352 sleeved on the outer wall of the guide post 351, and a fourth spring 353 disposed on the outer wall of the guide post 351.

[0047] Further, the locking block 352 includes a fourth receiving cylinder 3521 disposed on one side thereof, an anti-deflection groove 3522 disposed on the other side of the locking block 352, and an inclined surface 3523 disposed at the end of the locking block 352.

[0048] It should be noted that the slider 11 is a part of an electric linear slide. The electric linear slide can drive the slider 11 to move linearly through a servo motor. When a charging gun is loaded on the slider 11, it can be aligned with the fixed socket, and then the plugging and unplugging force test can be completed. Two brackets 12 are symmetrically distributed and fixed on the upper surface of the slider 11, and a hinge rod 13 completely penetrates through the tops of the two brackets 12 to connect the two brackets 12. In this embodiment, the hinge rod 13 adopts a form of bolt and nut connection as the hinge rod 13.

[0049] Preferably, a through positioning hole 111 is also formed on the surface of the slider 11. The positioning hole 111 is located between the two brackets 12, and the adjusting screw rod 342 can be inserted into it so that the adjusting screw rod 342 stands on the surface of the slider 11. In addition, directly above the positioning hole 111, a connecting platform 14 is fixed between the two brackets 12. The connecting platform 14 is in a block shape, and a through hole is formed in its center, enabling the adjusting screw rod 342 to pass through. Under the limitation of the rolling column 3421 and the thread on the top of the adjusting screw rod 342, the adjusting screw rod 342 can only rotate without dislocation.

[0050] Preferably, a hexagonal blind hole is also formed on the upper end surface of the rolling column 3421, which can not only facilitate personnel to directly rotate the rolling column 3421 to rotate the adjusting screw rod 342, but also assist in rotating the adjusting screw rod 342 with a hexagonal wrench.

[0051] A plurality of limiting windows 121 are formed on the side walls of each bracket 12, which can be used to observe the movement states of the pre-tightening unit 2 and the fastening unit 3. In particular, the uppermost limiting window 121 can limit the maximum stroke when the pushing member 23 swings. Specifically, the two pushing rods 232 on the pushing member 23 respectively pass through the two uppermost limiting windows 121. When the pushing member 23 swings, the pushing rods 232 will be blocked by the inner wall of the limiting window 121, resulting in the limitation of the swinging amplitude of the pushing member 23.

[0052] Preferably, a guide rod 15 is fixed on one side of the two brackets 12, and a bracket 161 is sleeved on the top of the guide rod 15. The bracket 161 is in a U shape as a whole, which can be used to support the handle part of the charging gun, making the force on the charging gun more uniform during the clamping process, and can also reduce the shaking or free clearance of the charging gun in the force measurement experiment, reducing the measurement error. A second receiving cylinder 1611 is fixed at the bottom of the bracket 161, and the top of the guide rod 15 is inserted into the second receiving cylinder 1611. The shapes of the two are limited similar to that of a cylinder to prevent them from dislocating. In addition, a third spring 162 is installed between the upper surface of the guide rod 15 and the upper part inside the second receiving cylinder 1611, so that the bracket 161 always provides an upward force, playing a role in further fixing and buffering and shock absorption.

[0053] Preferably, the snap ring 21 cooperates with the hinge rod 13 through the hinge plate 213 fixed below it, enabling the snap ring 21 to swing around the axis of the hinge rod 13. It should be noted that a through hole is formed in the center of the hinge plate 213 here for the hinge rod 13 to pass through.

[0054] On the end face of the snap ring 21, several limiting pieces 211 are also fixed, which are evenly distributed in a circular pattern. Each limiting piece 211 points to the center of the snap ring 21. When the charging gun is inserted into the snap ring 21, only the charging head part of the charging gun is allowed to completely pass through from the other end of the snap ring 21, and the gun body of the charging gun is inside the snap ring 21, restricting the passing distance of the charging gun to facilitate the implementation of the next tightening action.

[0055] At the vertex of the inner wall of the snap ring 21, a stationary block 212 is also fixed, which can prevent the charging gun from being overly misaligned in the snap ring 21 and cooperate with the clamping block 22 to fix the charging gun.

[0056] The third receiving cylinder 214 is fixedly connected to the snap ring 21 through a hinge plate 213, with the opening facing downward, for receiving the pushing member 23. To facilitate the up and down movement of the pushing member 23, a pair of symmetrically distributed movable slots 215 are also provided on the side wall of the third receiving cylinder 214, so that the push rod 232 can be connected to the pushing member 23 while also acting on the two clamping blocks 22.

[0057] Preferably, the number of clamping blocks 22 is two and they are symmetrically distributed. They completely penetrate the side wall of the snap ring 21 and point to the center of the snap ring 21. The clamping blocks 22 are strip-shaped, and the position in contact with the charging gun is arc-shaped, which can reduce the contact friction when pre-tightening the charging gun and make the pre-tightening process more efficient. On the opposite side of the arc-shaped contact surface of the clamping block 22, a tail rod 221 is also fixed. The cross-section of the tail rod 221 is not circular. In this embodiment, it is waist-shaped, which can prevent the clamping block 22 from rotating during movement. It should be noted that only the tail rod 221 completely penetrates the outer wall of the snap ring 21. In addition, a through hole is provided at the tail end of the tail rod 221, which can facilitate the push rod 232 to pass through, so that the pushing member 23 can control the expansion and contraction of the clamping block 22 on the snap ring 21.

[0058] Preferably, the top circular block 231 on the pushing member 23 moves inside the third receiving cylinder 214. An extension rod 233 is also fixed at the bottom of the top circular block 231. The extension rod 233 extends out of the third receiving cylinder 214, and the bottom circular block 234 is fixedly connected to the bottom of the extension rod 233. At this time, the pushing member 23 can move up and down inside the third receiving cylinder 214. Since two symmetrically distributed push rods 232 are fixed to the top circular block 231, the pushing member 23 cannot rotate due to the limitation of the movable slots 215. At this time, the pushing member 23 and the third receiving cylinder 214 form an approximate cylinder structure. A first spring 24 is also provided between the bottom of the inner cavity of the third receiving cylinder 214 and the top circular block 231, and the first spring 24 can always exert an upward force on the pushing member 23.

[0059] Preferably, there is an included angle between the two push rods 232, and the distance between them can be adjusted according to the actual situation.

[0060] Therefore, when no charging gun is inserted into the clamping ring 21, the pushing member 23 will push the clamping block 22 into the clamping ring 21. When the charging gun is inserted into the clamping ring 21, the charging head and the gun body will squeeze and force the two clamping blocks 22 to move outward, and the pushing member 23 will move downward accordingly until the end of the gun body abuts against the limiting piece 211. At this time, the clamping blocks 22 and the stationary block 212 play a role in clamping the charging gun, and the operator can also finely adjust the rotation angle of the charging gun at this time. Therefore, the entire pre-tightening unit 2 plays a role in pre-tightening the charging gun.

[0061] Preferably, the first receiving cylinder 31 is sleeved at the position of the bottom round block 234 with the opening facing upward. Therefore, the first receiving cylinder 31 can move up and down along the extension rod 233. The first receiving cylinder 31 and the pushing member 23 also form a structure similar to a cylinder to prevent the first receiving cylinder 31 from being displaced. In addition, a second spring 33 is installed between the bottom of the inner cavity of the first receiving cylinder 31 and the bottom round block 234, which can apply a force to the pushing member 23 and the first receiving cylinder 31. The force on the side of the pushing member 23 can assist in pre-tightening, and the force on the side of the first receiving cylinder 31 can ensure that the first receiving cylinder 31 and the roller 32 fixed to its bottom are closely attached to the upper surface of the arc-shaped plate 341.

[0062] In order to prevent the roller 32 from rotating around the extension rod 233, two symmetrically distributed limiting strips 312 are fixed inside the third receiving cylinder 214. Correspondingly, limiting grooves 235 are also opened on both sides of the bottom round block 234. The cooperation between the two can prevent the third receiving cylinder 214 and the roller 32 fixed to its bottom from rotating, and at the same time does not affect the axial movement between the pushing member 23 and the first receiving cylinder 31.

[0063] An arc-shaped plate 341 is also provided directly below the pre-tightening unit 2. The cross-section of the arc-shaped plate 341 is triangular, with an arc surface with a certain inclination on the upper surface and a flat surface on the lower surface. Its width is exactly the distance between the two brackets 12, so it can be just placed between the brackets 12.

[0064] A vertical through hole is opened at the relatively high end of the arc-shaped plate 341, and the guide rod 15 just passes through this through hole. A threaded cylinder 3412 is fixed at the relatively low end. The threaded cylinder 3412 cooperates with the adjusting screw rod 342. Therefore, when the adjusting screw rod 342 rotates, the arc-shaped plate 341 will rise or fall accordingly. In addition, the threaded cylinder 3412 can limit the swinging direction of the clamping ring 21 and, together with the inner wall of the limiting window 121, limit the clamping ring 21 in two directions. The threaded cylinder 3412 can make the pre-tightening unit 2 stop moving and remain in a vertical state.

[0065] Preferably, due to the action of the second spring 33, the roller 32 will always move from the lower end to the upper end of the arc-shaped plate 341, causing the entire pre-tightening unit 2 to tilt until the push rod 232 touches the limit window 121 and stops swinging. This angle facilitates the operator to insert the charging gun obliquely downward, making the operation of fixing the charging gun more convenient.

[0066] Then, when the operator presses down the charging gun, the pre-tightening unit 2 tends to be vertical. During this process, the first receiving cylinder 31 reversely compresses the second spring 33, increasing the clamping force of the charging gun in the pre-tightened state.

[0067] If the fixing force of the charging gun still cannot be satisfied at this time, the operator needs to actively adjust the adjusting screw rod 342 to raise the arc-shaped plate 341 and increase the compression amount of the second spring 33 again until the fixing force of the charging gun is sufficient.

[0068] Preferably, a horizontal guiding column 351 is also fixed to the side wall of the bracket 12, and the locking block 352 is sleeved outside the guiding column 351. Specifically, a fourth receiving cylinder 3521 is fixed to the side of the locking block 352, and the fourth receiving cylinder 3521 is sleeved outside the guiding column 351, forming a structure similar to a cylinder to prevent the dislocation of the locking block 352. A fourth spring 353 is installed between the end of the guiding column 351 and the fourth receiving cylinder 3521. The fourth spring 353 is sleeved on the outer wall of the guiding column 351 and can push the locking block 352 along the central direction of the two brackets 12.

[0069] A through anti-deflection groove 3522 is also formed in the side wall of the locking block 352. In this embodiment, it just allows the horizontal part of the bracket 12 to pass through, enabling the locking block 352 to move axially and preventing it from rotating. A slope 3523 is also provided at the end of the locking block 352 facing away from the guiding column 351, and the slope 3523 faces the guide rod 15.

[0070] When the operator presses down the charging gun until the pre-tightening unit 2 tends to be vertical, the first receiving cylinder 31 presses the slope 3523 and forces the locking block 352 to move reversely. When the pre-tightening unit 2 is vertical, the locking block 352 resets and can prevent the pre-tightening unit 2 from tilting again due to the action of the second spring 33. At this time, the charging gun can be aligned with the socket and the plugging and unplugging force test can be carried out along the electric linear slide.

[0071] If the fixing force of the charging gun still cannot be satisfied during the process from pre-tightening to reinforcement, the height of the arc-shaped plate 341 needs to be further adjusted to achieve the final tightening effect.

[0072] When a person needs to remove the charging gun, pull the locking block 352 in the reverse direction so that the locking block 352 no longer limits the pre-tightening unit 2. At this time, the pre-tightening unit 2 swings to the tail of the arc-shaped plate 341 under the action of the second spring 33, and the locking block 352 resets under the action of the fourth spring 353. At this time, whether in the reinforcement state or the final fastening state, the clamping force can be retracted to the pre-tightening state, and at this time, the charging gun can be easily pulled out and removed.

[0073] In summary, the present invention can solve the problems of adaptability and accuracy in the plugging and unplugging force test of electric vehicle charging guns. It realizes multi-stage reinforcement of charging guns with different shapes and sizes, simplifies the installation and removal process of charging guns, and takes into account the fixing effect during the test.

[0074] Importantly, the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A charging gun plug-in force test device, characterized in that: include, A support unit (1) comprises a slider (11), a pair of brackets (12) arranged on the upper surface of the slider (11), a hinge rod (13) penetrating and arranged on the top of the bracket (12), a connecting platform (14) arranged between the brackets (12), a guide rod (15) arranged on one side of the bracket (12), and a supporting assembly (16) arranged at the end of the guide rod (15); A pre-tensioning unit (2) is hingedly connected to the hinge rod (13), the pre-tensioning unit (2) comprising a clamping ring (21), a clamping block (22) penetrating and arranged on the outer wall of the clamping ring (21), a pushing member (23) arranged at the bottom of the clamping ring (21), and a first spring (24) arranged on the outer wall of the pushing member (23); A fastening unit (3), comprising a first accommodating cylinder (31) arranged at the bottom of the pushing member (23), a roller (32) arranged at the bottom of the first accommodating cylinder (31), a second spring (33) arranged inside the first accommodating cylinder (31), a lifting assembly (34) arranged below the roller (32), and a locking assembly (35) arranged at one side of the connecting platform (14); The sliding block (11) comprises a positioning hole (111) which is arranged through the bottom of the sliding block; The clamping ring (21) comprises a limiting piece (211) arranged on its end surface, a stationary block (212) arranged on the inner wall of the clamping ring (21), a hinge plate (213) arranged on the outer wall of the clamping ring (21), a third accommodating tube (214) arranged at the bottom of the hinge plate (213), and a pair of movable grooves (215) arranged on the outer wall of the third accommodating tube (214); The clamping block (22) comprises a tail rod (221) arranged on one side thereof; The pushing member (23) comprises a top round block (231), a pushing rod (232) arranged on both sides of the top round block (231), an extension rod (233) arranged at the lower end of the top round block (231), a bottom round block (234) arranged at the lower end of the extension rod (233), and limiting grooves (235) arranged on both sides of the bottom round block (234); the pushing rod (232) passes through the tail rod (221); The first accommodating tube (31) comprises a pair of limiting strips (312) arranged on the inner wall thereof; The lifting assembly (34) comprises a curved plate (341) and an adjusting screw rod (342) arranged on one side of the curved plate (341); The arc-shaped plate (341) comprises a guide hole (3411) penetratingly arranged at a higher end thereof, and a threaded cylinder (3412) arranged at the other end of the arc-shaped plate (341); The adjusting screw rod (342) comprises a knurled column (3421) arranged at one end thereof; one end of the adjusting screw rod (342) is inserted into the positioning hole (111), and the other end passes through the connecting platform (14).

2. The charging gun plugging and extraction force testing device according to claim 1, characterized in that: The bracket (12) comprises a limiting window (121) which is arranged through one side thereof; The supporting assembly (16) comprises a bracket (161) and a third spring (162) arranged inside the bracket (161); the bracket (161) is sleeved on the top of the guide rod (15); The bracket (161) comprises a second accommodating cylinder (1611) arranged at the bottom thereof.

3. The charging gun plugging and extraction force testing device according to claim 2, characterized in that: The locking assembly (35) comprises a guide column (351) arranged on the side wall of the bracket (12), a locking block (352) sleeved on the outer wall of the guide column (351), and a fourth spring (353) arranged on the outer wall of the guide column (351).

4. The charging gun plugging and extraction force testing device according to claim 3, characterized in that: The locking block (352) comprises a fourth accommodating cylinder (3521) arranged on one side thereof, an anti-deflection groove (3522) arranged on the other side of the locking block (352), and a slope (3523) arranged at the end of the locking block (352).

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