Charging gun insertion and extraction force test equipment

Abstract

The invention discloses a charging gun insertion and extraction force test device, and relates to the technical field of electric vehicle detection, and the device comprises a supporting unit which comprises a sliding block, a pair of supports disposed on the upper surface of the sliding block, a hinge rod disposed at the tops of the supports in a penetrating manner, a connecting table disposed between the supports, a guide rod disposed at one side of the supports, and a bearing assembly disposed at the end part of the guide rod. The beneficial effect of the invention is that the adaptability and accuracy problems in the insertion and extraction force test of the charging gun of the electric vehicle can be solved. The multi-stage reinforcement of the charging gun in different shapes and sizes is realized, the mounting and withdrawing processes of the charging gun are simplified, the operation comfort is considered, and the fixing effect in the test process is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle detection, and in particular to a charging gun plugging and pulling force testing device. Background Art

[0002] The plug-in and pull-out force test of the charging gun is a key step in evaluating the safety and reliability of electric vehicle charging equipment. It ensures that the charging gun is both firm and easy to operate when plugging and unplugging, preventing accidental detachment or damage during charging, thereby ensuring user safety. In addition, this test also verifies the durability of the charging gun by simulating real-life usage, ensuring that its long-term repeated use will not affect its performance, improve charging efficiency, and help manufacturers improve the overall quality of their products to meet industry standards.

[0003] During the test, although the charging guns are similar in shape, their actual sizes are different, and this difference cannot be fully adapted to different charging guns for the experimental equipment. Existing equipment usually clamps the charging gun or socket to test the size of the plug-in and pull-out force. For different charging guns, a single clamp obviously cannot meet the installation requirements of various types of charging guns, causing the charging gun to become loose or unable to align with the socket when 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 above problems or problems existing in the prior art, the present invention is proposed.

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

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a charging gun plugging and unplugging force testing device, comprising a supporting unit, including a slider, a pair of brackets arranged on the upper surface of the slider, a hinged rod penetrating and arranged on the top of the bracket, a connecting platform arranged between the brackets, a guide rod arranged on one side of the bracket, and a supporting assembly arranged at the end of the guide rod; A pre-tightening unit is hinged to the hinge rod, and comprises a clamping ring, a clamping block provided through the outer wall of the clamping ring, a pushing member provided at the bottom of the clamping ring, and a first spring provided on the outer wall of the pushing member; The fastening unit includes a first accommodating cylinder arranged at the bottom of the pushing member, a roller arranged at the bottom of the first accommodating cylinder, a second spring arranged inside the first accommodating cylinder, a lifting assembly arranged below the roller, and a locking assembly arranged on one side of the connecting platform.

[0007] As a preferred solution of the charging gun plugging and extraction force testing device of the present invention, wherein: the sliding block includes a positioning hole penetratingly arranged at the bottom thereof; The bracket includes a limiting window which is arranged through one side thereof; The supporting assembly includes a bracket and a third spring arranged inside the bracket; the bracket is sleeved on the top of the guide rod; The bracket includes a second accommodating tube arranged at the bottom thereof.

[0008] As a preferred solution of the charging gun plugging and unplugging force testing equipment described in the present invention, the clamping ring includes a limit plate arranged on its end face, a stationary block arranged on the inner wall of the clamping ring, a hinge plate arranged on the outer wall of the clamping ring, a third accommodating cylinder arranged at the bottom of the hinge plate, and a pair of movable grooves arranged on the outer wall of the third accommodating cylinder.

[0009] As a preferred solution of the charging gun plugging and extraction force testing device of the present invention, wherein: the clamping block includes a tail rod arranged on one side thereof; The pushing member includes a top round block, a pushing rod arranged on both sides of the top round block, an extension rod arranged at the lower end of the top round block, a bottom round block arranged at the lower end of the extension rod, and limiting grooves arranged on both sides of the bottom round block; the pushing rod passes through the tail rod.

[0010] As a preferred solution of the charging gun plugging and extraction force testing device of the present invention, wherein: the first accommodating cylinder includes a pair of limiting strips arranged on the inner wall thereof.

[0011] As a preferred solution of the charging gun plugging and pulling force testing device of the present invention, wherein: the lifting assembly includes an arc-shaped plate, and an adjusting screw rod arranged on one side of the arc-shaped plate; The arc-shaped plate includes a guide hole penetrating through the higher end thereof, and a threaded barrel disposed at the other end of the arc-shaped plate; The adjusting screw rod comprises a knurled column arranged at one end thereof; one end of the adjusting screw rod is inserted into the positioning hole, and the other end passes through the connecting platform.

[0012] As a preferred solution of the charging gun plugging and unplugging force testing device described in the present invention, the locking assembly includes a guide column arranged on the side wall of the bracket, a locking block sleeved on the outer wall of the guide column, and a fourth spring arranged on the outer wall of the guide column.

[0013] As a preferred solution of the charging gun plugging and extraction force testing device described in the present invention, the locking block includes a fourth accommodating cylinder arranged on one side thereof, an anti-deflection groove arranged on the other side of the locking block, and a slope arranged on the end of the locking block.

[0014] Beneficial effects of the invention: The invention can solve the problems of adaptability and accuracy in the plug-in and pull-out force test of electric vehicle charging guns. It realizes multi-level reinforcement of charging guns of different shapes and sizes, simplifies the installation and withdrawal process of the charging gun, takes into account the comfort of operation, and ensures the fixing effect during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is an overall three-dimensional view of the present invention.

[0017] Figure 2 This is a structural view of the support unit of the present invention.

[0018] Figure 3 This is a structural view of the pre-tensioning unit of the present invention.

[0019] Figure 4 It is a top view of the overall structure of the present invention.

[0020] Figure 5 For the present invention Figure 4 AA full section view.

[0021] Figure 6 For the present invention Figure 4 Full cross-section view of BB. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. Example 1

[0025] Reference Figure 1 to Figure 6 , which is the first embodiment of the present invention, and provides a charging gun plugging and unplugging force testing device, which includes a supporting unit 1, including 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; The pre-tightening unit 2 is hinged to the hinge rod 13, and includes 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; The fastening unit 3 includes 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 on one side of the connecting platform 14.

[0026] Furthermore, the slider 11 includes a positioning hole 111 extending through the bottom thereof; the bracket 12 includes a limiting window 121 extending through one side thereof; The supporting assembly 16 includes a bracket 161 and a third spring 162 disposed inside the bracket 161; the bracket 161 is sleeved on the top of the guide rod 15; The bracket 161 includes a second accommodating tube 1611 disposed at the bottom thereof.

[0027] Furthermore, the retaining ring 21 includes a limit plate 211 arranged on its end face, a stationary block 212 arranged on the inner wall of the retaining ring 21, a hinge plate 213 arranged on the outer wall of the retaining 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.

[0028] Further, the clamping block 22 includes a tail rod 221 disposed on one side thereof; The pushing member 23 includes 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.

[0029] Furthermore, the first accommodating tube 31 includes a pair of limiting strips 312 arranged on the inner wall thereof.

[0030] Furthermore, 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; The arc plate 341 includes a guide hole 3411 penetratingly disposed at a higher end thereof, and a threaded barrel 3412 disposed at the other end of the arc plate 341; The adjusting screw rod 342 includes a knurled 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 thereof passes through the connecting platform 14 .

[0031] Furthermore, 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 .

[0032] Furthermore, the locking block 352 includes a fourth accommodating cylinder 3521 disposed on one side thereof, an anti-deflection groove 3522 disposed on the other side of the locking block 352 , and a slope 3523 disposed on the end of the locking block 352 .

[0033] It should be noted that the slider 11 is a component of the electric linear slide. The electric linear slide can be driven by a servo motor to move the slider 11 linearly. When the slider 11 is loaded with a charging gun, it can be aligned with the fixed socket to complete the plug-in force test. Two symmetrically distributed brackets 12 are fixed on the upper surface of the slider 11, and a hinge rod 13 completely penetrates the top of the two brackets 12 and connects the two brackets 12. The hinge rod 13 in this embodiment is connected in the form of bolts and nuts as the hinge rod 13.

[0034] Preferably, a positioning hole 111 is provided on the surface of the slider 11, and the positioning hole 111 is between the two brackets 12, and the adjusting screw 342 can be inserted into the positioning hole 111, so that the adjusting screw 342 stands on the surface of the slider 11. In addition, a connecting platform 14 is fixed between the two brackets 12 just above the positioning hole 111, and the connecting platform 14 is block-shaped, and a through hole is provided in the center thereof, so that the adjusting screw 342 can pass through. Under the limitation of the knurled column 3421 and the screw thread at the top of the adjusting screw 342, the adjusting screw 342 can only rotate without dislocation.

[0035] Preferably, a hexagonal blind hole is further provided on the upper end surface of the knurled column 3421, so that a person can directly rotate the knurled column 3421 to rotate the adjusting screw 342, or a hexagonal wrench can be used to assist in rotating the adjusting screw 342.

[0036] A plurality of limit windows 121 are provided on the side wall of each bracket 12, which can be used to observe the movement status of the pre-tightening unit 2 and the fastening unit 3. In particular, the limit window 121 at the uppermost end can limit the maximum stroke of the push member 23 when it swings. Specifically, the two push rods 232 on the push member 23 pass through the two limit windows 121 at the uppermost end respectively. When the push member 23 swings, the push rod 232 will be hindered by the inner wall of the limit window 121, resulting in the swing amplitude of the push member 23 being limited.

[0037] 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 U-shaped as a whole, and can be used to support the handle part of the charging gun, so that the force on the charging gun is more uniform during the clamping process, and can also reduce the shaking or free gap of the charging gun in the force measurement experiment, reducing the measurement error. A second accommodating cylinder 1611 is fixed to the bottom of the bracket 161, and the top of the guide rod 15 is inserted into the second accommodating cylinder 1611. The two are limited by a shape similar to a cylinder to prevent them from being dislocated, and a third spring 162 is installed between the upper surface of the guide rod 15 and the upper part of the second accommodating cylinder 1611, so that the bracket 161 always provides an upward force, which plays a further fixing and buffering effect.

[0038] Preferably, the snap ring 21 cooperates with the hinge rod 13 through the hinge plate 213 fixed thereunder, so that the snap ring 21 can swing about the axis of the hinge rod 13. It should be noted that a through hole is provided in the center of the hinge plate 213 for the hinge rod 13 to pass through.

[0039] A number of limit plates 211 are fixed to the end face of the clamping ring 21, which are evenly distributed around the circumference. Each limit plate 211 points to the center of the clamping ring 21. When the charging gun is inserted into the clamping ring 21, only the charging head of the charging gun is allowed to completely pass through the other end of the clamping ring 21, and the gun body of the charging gun is inside the clamping ring 21, which limits the distance the charging gun passes and facilitates the implementation of the next tightening action.

[0040] A stationary block 212 is also fixed at the top of the inner wall of the clamping ring 21 to prevent the charging gun from being excessively misplaced in the position of the clamping ring 21 and to fix the charging gun in cooperation with the clamping block 22 .

[0041] The third accommodating cylinder 214 is fixedly connected to the retaining ring 21 through a hinge plate 213, with an opening facing downward, for accommodating the pushing member 23. In order to facilitate the up and down movement of the pushing member 23, a pair of symmetrically distributed movable grooves 215 are also provided on the side wall of the third accommodating cylinder 214, so that the pushing rod 232 can be connected to the pushing member 23 and can also act on the two clamping blocks 22.

[0042] Preferably, there are two clamping blocks 22 and they are symmetrically distributed, completely passing through the side wall of the retaining ring 21 and pointing to the center of the retaining ring 21. The clamping block 22 is in the shape of an elongated strip, and the position in contact with the charging gun is in the shape of an arc, which can reduce the contact friction when pre-tightening the charging gun, making the pre-tightening process more efficient. A tail rod 221 is also fixed on the opposite side of the arc-shaped contact surface of the clamping block 22. The cross-section of the tail rod 221 is not circular, and 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 passes through the outer wall of the retaining ring 21. In addition, a through hole is opened at the tail end of the tail rod 221, which can facilitate the passage of the push rod 232, so that the push member 23 can control the extension and retraction of the clamping block 22 on the retaining ring 21.

[0043] Preferably, the top round block 231 on the pusher 23 moves inside the third accommodating tube 214, and an extension rod 233 is also filed at the bottom of the top round block 231, the extension rod 233 extends out of the third accommodating tube 214, and the bottom round block 234 is fixedly connected to the bottom of the extension rod 233. At this time, the pusher 23 can move up and down inside the third accommodating tube 214. Since there are two symmetrically distributed push rods 232 fixed to the top round block 231, the pusher 23 cannot rotate due to the movable groove 215. At this time, the pusher 23 and the third accommodating tube 214 form a cylinder structure. A first spring 24 is also provided between the bottom of the inner cavity of the third accommodating tube 214 and the top round block 231. The first spring 24 can always exert an upward force on the pusher 23.

[0044] Preferably, there is an angle between the two push rods 232, and the distance between the two can be adjusted according to actual conditions.

[0045] Therefore, when there is no charging gun inserted into the retaining ring 21, the pushing member 23 will push the clamping block 22 into the retaining ring 21, and when the charging gun is inserted into the retaining 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 down accordingly until the end of the gun body is against the limit plate 211. At this time, the clamping block 22 and the stationary block 212 clamp the charging gun, and the personnel can also fine-tune the rotation angle of the charging gun at this time. Therefore, the entire pre-tightening unit 2 pre-tightens the charging gun.

[0046] Preferably, the first accommodating cylinder 31 is sleeved on the position of the bottom round block 234 with the opening facing upward, so that the first accommodating cylinder 31 can move up and down along the extension rod 233. The first accommodating cylinder 31 and the pushing member 23 also form a structure similar to a cylinder to prevent the first accommodating cylinder 31 from being dislocated. In addition, a second spring 33 is installed between the bottom of the inner cavity of the first accommodating cylinder 31 and the bottom round block 234, which can apply a force to the pushing member 23 and the first accommodating 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 accommodating cylinder 31 can ensure that the first accommodating cylinder 31 and the roller 32 fixed at its bottom are close to the upper surface of the arc plate 341.

[0047] In order to prevent the roller 32 from rotating around the extension rod 233, two symmetrically distributed limit bars 312 are fixed inside the third accommodating cylinder 214. Correspondingly, limit grooves 235 are also provided on both sides of the bottom round block 234. The cooperation of the two can prevent the third accommodating cylinder 214 and the roller 32 fixed at the bottom thereof from rotating, while not affecting the axial movement between the pushing member 23 and the first accommodating cylinder 31.

[0048] An arc plate 341 is provided directly below the preload unit 2 . The cross section of the arc plate 341 is triangular, the upper surface is an arc surface with a certain inclination angle, and the lower surface is a plane. Its width is exactly the distance between the two brackets 12 , so it can be placed exactly between the brackets 12 .

[0049] A vertical through hole is provided at the upper end of the arc plate 341, through which the guide rod 15 passes, and a threaded barrel 3412 is fixed at the lower end, which cooperates with the adjusting screw 342, so when the adjusting screw 342 rotates, the arc plate 341 will rise or fall accordingly. In addition, the threaded barrel 3412 can limit the swing direction of the clamping ring 21, and simultaneously act with the inner wall of the limiting window 121, so that the clamping ring 21 is limited in two directions. The threaded barrel 3412 can stop the preload unit 2 from moving and keep it in a vertical state.

[0050] Preferably, due to the action of the second spring 33, the roller 32 will always move from the lower end to the higher end of the arc plate 341, thereby tilting the entire preload unit 2 until the push rod 232 stops swinging after hitting the limit window 121. This angle can facilitate personnel to insert the charging gun obliquely downward, making the work of fixing the charging gun smoother.

[0051] Then, when the person presses down the charging gun, the pre-tensioning unit 2 tends to be vertical. During this process, the first accommodating cylinder 31 reversely compresses the second spring 33, so that the clamping force of the charging gun in the pre-tensioned state is greater.

[0052] If the fixing force of the charging gun is still not sufficient at this time, personnel need to actively adjust the adjusting screw 342 to make the arc plate 341 rise, and increase the compression amount of the second spring 33 again until the fixing force of the charging gun is sufficient.

[0053] Preferably, a horizontal guide column 351 is fixed to the side wall of the bracket 12, and the locking block 352 is sleeved on the outside of the guide 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 on the outside of the guide column 351 to form a cylinder-like structure to prevent the locking block 352 from being dislocated. A fourth spring 353 is installed between the end of the guide column 351 and the fourth receiving cylinder 3521, and the fourth spring 353 is sleeved on the outer wall of the guide column 351, which can push the locking block 352 along the center direction of the two brackets 12.

[0054] A through anti-deflection groove 3522 is also provided on the side wall of the locking block 352, which in this embodiment allows the cross frame portion of the bracket 12 to pass through, so that the locking block 352 can move axially and cannot rotate. A slope 3523 is also provided on the end of the locking block 352 facing away from the guide column 351, and the slope 3523 faces the guide rod 15.

[0055] When the person presses the charging gun until the pre-tensioning unit 2 tends to be vertical, the first accommodating cylinder 31 squeezes the inclined surface 3523 and forces the locking block 352 to move in the opposite direction. When the pre-tensioning unit 2 is vertical, the locking block 352 is reset and can prevent the pre-tensioning 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 perform the plug-in and pull-out force test along the electric linear slide.

[0056] If the process from pre-tightening to reinforcement of the charging gun still cannot meet the fixing force of the charging gun, it is necessary to further adjust the height of the arc plate 341 to achieve the final tightening effect.

[0057] When the personnel need to remove the charging gun, they pull the locking block 352 in the opposite direction so that the locking block 352 no longer limits the pre-tensioning unit 2. At this time, the pre-tensioning unit 2 swings to the tail of the arc plate 341 under the action of the second spring 33, and the locking block 352 is reset under the action of the fourth spring 353. At this time, whether it is in the reinforcement state or the final tightening state, the clamping force can return to the pre-tensioning state, and the charging gun can be easily pulled out and removed.

[0058] In summary, the present invention can solve the problems of adaptability and accuracy in the plug-in and pull-out force test of electric vehicle charging guns, realize multi-level reinforcement of charging guns of different shapes and sizes, simplify the installation and withdrawal process of charging guns, and take into account the fixing effect during the test process.

[0059] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in 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); The fastening unit (3) comprises 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 on one side of the connecting platform (14).

2. The charging gun plugging and extraction force testing device according to claim 1, characterized in that: The sliding block (11) comprises a positioning hole (111) which is arranged through the bottom of the sliding block; 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 clamping ring (21) comprises a limiting plate (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).

4. The charging gun plugging and extraction force testing device according to claim 2 or 3, characterized in that: 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).

5. The charging gun plugging and extraction force testing device according to claim 4, characterized in that: The first accommodating tube (31) comprises a pair of limiting strips (312) arranged on the inner wall thereof.

6. The charging gun plugging and extraction force testing device according to claim 5, characterized in that: 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).

7. The charging gun plugging and extraction force testing device according to claim 6, 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).

8. The charging gun plugging and extraction force testing device according to any one of claims 5 to 7, 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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