A portable DC charging pile detection device

Abstract

The application relates to the technical field of direct-current charging pile detection, in particular to a direct-current charging pile detection device convenient to carry, which comprises a detection box, a box cover rotatably installed at one end of the top of the detection box and an interface module fixedly installed at one end of the top of the detection box, two fixed rods one and two are arranged at one end of the top of the detection box close to the interface module, the outer top ends of the two fixed rods one and the outer top ends of the two fixed rods two are both slidably sleeved with connecting rods, and a pushing mechanism is arranged below the two connecting rods. The application has the beneficial effect of solving the problem that the existing technology is labor-consuming when inserting the charging gun into the interface module due to the slight deformation caused by the collision between the charging gun and other objects, and the operation and maintenance personnel can easily insert or take out the charging gun, and the device is also labor-saving when detecting multiple charging piles.

Description

Technical Field

[0001] This invention relates to the field of DC charging pile testing technology, specifically a portable DC charging pile testing device. Background Technology

[0002] Charging stations are charging devices that provide energy replenishment for electric vehicles. Their function is similar to a gas pump at a gas station. They can be fixed to the ground or wall and installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential parking lots or charging stations. They can charge various models of electric vehicles according to different voltage levels. To ensure that the quality and performance of charging stations meet standards, they need to be inspected regularly.

[0003] In existing technologies, when maintenance personnel use portable testing devices to diagnose faulty charging piles, the testing device directly displays whether the charging pile is abnormal and uploads the test results to the intelligent power distribution system, triggering a maintenance work order or updating the pile's health status. During the charging pile testing process, the charging gun from the charging pile needs to be inserted into the interface module of the DC charging pile testing device before testing. However, in actual use, some charging guns, due to prolonged use, may experience slight deformation at the nozzle due to collisions with other objects. This results in a misalignment between the charging gun and the interface module, making insertion difficult. Furthermore, removing the charging gun may damage the entire testing device, making testing multiple charging piles even more difficult. Summary of the Invention

[0004] The purpose of this invention is to provide a portable DC charging pile testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a portable DC charging pile testing device, comprising a testing box, a box cover rotatably mounted on one end of the top of the testing box, and an interface module fixedly mounted on one end of the top of the testing box. Two fixing rods 1 and two fixing rods 2 are provided on the top of the testing box near the interface module. Connecting rods are slidably sleeved on the outer sides of the tops of the two fixing rods 1 and the two fixing rods 2. A pushing mechanism is provided below each of the two connecting rods. Limiting seats 1 are fixedly installed at both ends of the bottom of the two connecting rods. Limiting seats 2 are fixedly installed in the middle of the two fixing rods 1 and the two fixing rods 2. Springs 1 are sleeved on the outer sides of the two fixing rods 1 and the two fixing rods 2. The two ends of the four springs 1 are respectively fixedly connected to their corresponding limiting seats 1 and limiting seats 2.

[0006] Preferably, the outer side of the testing box is rotatably mounted with three handles, two symmetrically arranged rollers are fixedly mounted at both ends of the bottom of the testing box, and a storage box is slidably mounted at one end of the testing box.

[0007] Preferably, the pushing mechanism includes a cylinder and two frames. The tops of the two frames are respectively fixedly sleeved on both ends of the connecting rod. Limiting grooves are formed at both ends of the bottom of the two frames. A clamping block is provided between the two frames. A T-shaped frame is fixedly installed on the telescopic shaft end of the cylinder. A T-shaped slider is fixedly installed at both ends of the bottom of the T-shaped frame. A T-shaped groove is formed at both ends of the top of the clamping block. The two T-shaped sliders are slidably installed inside the two T-shaped grooves. Limiting sliders are fixedly installed on both sides of the clamping block. The two limiting sliders are slidably installed inside their respective limiting grooves.

[0008] Preferably, the bottoms of the two fixing rods and the bottoms of the two fixing rods are all fixedly installed with support plates, the two cylinders are respectively fixedly installed on the tops of the two support plates, and rubber pads are fixedly installed on the opposite sides of the two clamping blocks.

[0009] Preferably, four retaining rings are fixedly installed at the top of the testing box near the interface module. The four retaining rings are symmetrically distributed in pairs on both sides of the interface module. The two fixing rods and the two fixing rods cooperate with the four retaining rings respectively. The retaining rings at the bottom of the two fixing rods are provided with positioning grooves. The two fixing rods are provided with operating mechanisms and fixing mechanisms.

[0010] Preferably, the operating mechanism includes an adjusting rod, the top of which is threadedly connected to a fixed rod, the bottom of which is rotatably mounted inside the fixed rod, a lifting plate being rotatably mounted on the bottom of the adjusting rod, guide rods being slidably sleeved at both ends of the lifting plate, both guide rods being fixedly mounted inside the fixed rod, and a protrusion being fixedly mounted on the outside of the adjusting rod.

[0011] Preferably, the fixing mechanism includes a movable block, a fixed block is slidably mounted on one end of the movable block, the fixed block cooperates with the positioning groove, a spring is fixedly mounted between the side of the fixed block away from the positioning groove and the interior of the movable block, a transmission groove is provided on the side of the movable block away from the fixed block, a transmission rod is movably mounted inside the transmission groove, the top of the transmission rod is fixedly connected to the lifting plate, a T-shaped sliding groove is provided on the bottom of the movable block, and a T-shaped slider is provided on the bottom of the fixed rod that cooperates with the T-shaped sliding groove.

[0012] Preferably, one of the connecting rods has an inner cylinder fixedly installed at both ends, and the other connecting rod has an outer cylinder fixedly installed at both ends. The ends of the two inner cylinders away from the connecting rods they are connected to are slidably sleeved inside the two outer cylinders. The interior of each of the two inner cylinders is provided with a fixing mechanism II, and the ends of the two outer cylinders near the inner cylinders are provided with positioning grooves II.

[0013] Preferably, the fixing mechanism two includes a push plate and a moving block two. The push plate cooperates with the protrusion block. The push plate is slidably fitted inside the inner cylinder. Guide rods two are slidably sleeved at both ends of the moving block two. Both guide rods two are fixedly installed inside the inner cylinder. A spring three is sleeved on the outside of one of the guide rods two. A fixing block two is slidably sleeved on the top of the moving block two. The fixing block two cooperates with the positioning groove two. A spring four is fixedly installed between the bottom of the fixing block two and the inner wall of the moving block two.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. With the two push mechanisms, the charging gun port can be easily inserted into the interface module a certain distance. The two push mechanisms can then assist in the subsequent insertion of the charging gun. The detection box directly displays whether the charging pile is abnormal and uploads the detection results to the intelligent power distribution system, triggering maintenance work orders or updating the health status of the pile. The push mechanism solves the problem in the existing technology where the charging gun is difficult to insert into the interface module due to slight deformation caused by collisions between the charging gun and other objects. Maintenance personnel can easily insert or remove the charging gun into the interface module, which is also very labor-saving when testing multiple charging piles.

[0016] 2. Through the fixed mechanism, the fixed rod 1 and fixed rod 2 can be quickly disassembled and assembled with the test box. When the charging pile is not being tested, the device can be quickly disassembled from the top of the test box, thus making the entire test device easy to assemble. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the top structure of the detection box of the present invention;

[0019] Figure 3 This is a schematic diagram of the retaining ring structure of the present invention;

[0020] Figure 4 This is a partial three-dimensional structural diagram of the present invention;

[0021] Figure 5 This is a schematic diagram of the connection structure between the first fixing rod and the second fixing rod of the present invention;

[0022] Figure 6 This is a schematic diagram of the actuation mechanism of the present invention;

[0023] Figure 7 This is a partial structural diagram of the adjusting rod of the present invention;

[0024] Figure 8 This is a schematic diagram of the moving block structure of the present invention;

[0025] Figure 9 This is a schematic diagram of the combined structure of the operating mechanism and the second fixing mechanism of the present invention;

[0026] Figure 10 This is a schematic diagram of the structure of the fixing mechanism of the present invention;

[0027] Figure 11 This is a partial cross-sectional view of the connection between the outer cylinder and the inner cylinder of the present invention;

[0028] Figure 12 This is a schematic diagram of the movable block two structure of the present invention.

[0029] The attached diagram lists the components represented by each number as follows: 1. Testing box; 2. Box cover; 3. Interface module; 4. Handle; 5. Roller; 6. Storage box; 7. Fixing rod one; 8. Fixing rod two; 9. Connecting rod; 10. Cylinder; 11. T-shaped frame; 12. T-shaped slider one; 13. Limiting groove; 14. Clamping block; 15. T-shaped groove one; 16. Limiting slider; 17. Rubber pad; 18. Limiting seat one; 19. Limiting seat two; 20. Spring one; 21. Locking ring; 22. 23. Positioning groove 1; 24. Adjusting rod; 25. Lifting plate; 26. Guide rod 1; 27. Moving block 1; 28. Fixing block 1; 29. ​​Spring 2; 30. Transmission groove; 31. Transmission rod; 32. T-shaped slide groove 2; 33. T-shaped slider 2; 34. Protrusion block; 35. Inner cylinder; 36. Outer cylinder; 37. Positioning groove 2; 38. Push plate; 39. Moving block 2; 40. Guide rod 2; 41. Spring 3; 42. Fixing block 2; 43. Spring 4; 44. Support plate; 45. Frame. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides a technical solution: such as Figures 1-12The portable DC charging pile testing device shown includes a testing box 1, a box cover 2 rotatably mounted on one end of the top of the testing box 1, and an interface module 3 fixedly mounted on one end of the top of the testing box 1. Two fixing rods 7 and two fixing rods 8 are provided on the top of the testing box 1 near the interface module 3. Connecting rods 9 are slidably sleeved on the outer ends of the tops of the two fixing rods 7 and the two fixing rods 8. Pushing mechanisms are provided below the two connecting rods 9. Limiting seats 18 are fixedly installed at both ends of the bottom of the two connecting rods 9. Limiting seats 29 are fixedly installed in the middle of the two fixing rods 7 and the two fixing rods 8. Springs 20 are sleeved on the outer ends of the two fixing rods 7 and the two fixing rods 8. The two ends of the four springs 20 are fixedly connected to their respective limiting seats 18 and limiting seats 29.

[0032] Three handles 4 are rotatably mounted on the outside of the testing box 1. Two symmetrically arranged rollers 5 are fixedly mounted at both ends of the bottom of the testing box 1. A storage box 6 is slidably mounted on one end of the testing box 1.

[0033] The pushing mechanism includes a cylinder 10 and two frames 44. The tops of the two frames 44 are fixedly sleeved on both ends of the connecting rod 9. Limiting grooves 13 are opened at both ends of the bottom of the two frames 44. A clamping block 14 is arranged between the two frames 44. A T-shaped frame 11 is fixedly installed on the telescopic shaft end of the cylinder 10. T-shaped sliders 12 are fixedly installed at both ends of the bottom of the T-shaped frame 11. T-shaped grooves 15 are opened at both ends of the top of the clamping block 14. The two T-shaped sliders 12 are slidably installed inside the two T-shaped grooves 15 respectively. Limiting sliders 16 are fixedly installed on both sides of the clamping block 14. The two limiting sliders 16 are slidably installed inside their respective limiting grooves 13 respectively.

[0034] Support plates 43 are fixedly installed at the bottom of the two fixing rods 7 and the bottom of the two fixing rods 8. The tops of the two support plates 43 are fixedly installed on the two cylinders 10 respectively. Rubber pads 17 are fixedly installed on the opposite sides of the two clamping blocks 14.

[0035] Four retaining rings 21 are fixedly installed on the top of the test box 1 near the interface module 3. The four retaining rings 21 are symmetrically distributed in pairs on both sides of the interface module 3. Two fixing rods 1 7 and two fixing rods 2 8 cooperate with the four retaining rings 21 respectively. The retaining rings 21 at the bottom of the two fixing rods 1 7 are provided with positioning grooves 22. The two fixing rods 1 7 are provided with operating mechanisms and fixing mechanisms 1.

[0036] The operating mechanism includes an adjusting rod 23. The top of the adjusting rod 23 is threadedly connected to the fixed rod 7. The bottom of the adjusting rod 23 is rotatably installed inside the fixed rod 7. A lifting plate 24 is rotatably installed at the bottom of the adjusting rod 23. Guide rods 25 are slidably sleeved at both ends of the lifting plate 24. Both guide rods 25 are fixedly installed inside the fixed rod 7. A protrusion 33 is fixedly installed on the outside of the adjusting rod 23.

[0037] The fixing mechanism includes a movable block 26, a fixed block 27 is slidably mounted on one end of the movable block 26, the fixed block 27 cooperates with the positioning groove 22, a spring 28 is fixedly installed between the side of the fixed block 27 away from the positioning groove 22 and the interior of the movable block 26, a transmission groove 29 is opened on the side of the movable block 26 away from the fixed block 27, a transmission rod 30 is movably installed inside the transmission groove 29, the top of the transmission rod 30 is fixedly connected to the lifting plate 24, a T-shaped slide groove 31 is opened on the bottom of the movable block 26, and a T-shaped slider 32 that cooperates with the T-shaped slide groove 31 is opened on the bottom of the fixed rod 7.

[0038] One of the connecting rods 9 has an inner cylinder 34 fixedly installed at both ends, and the other connecting rod 9 has an outer cylinder 35 fixedly installed at both ends. The ends of the two inner cylinders 34 away from the connecting rods 9 are slidably sleeved inside the two outer cylinders 35. The two inner cylinders 34 are each provided with a fixing mechanism II. The ends of the two outer cylinders 35 near the inner cylinders 34 are each provided with a positioning groove II 36.

[0039] The second fixing mechanism includes a push plate 37 and a second moving block 38. The push plate 37 cooperates with the protrusion 33. The push plate 37 is slidably fitted inside the inner cylinder 34. Guide rods 39 are slidably sleeved at both ends of the second moving block 38. Both guide rods 39 are fixedly installed inside the inner cylinder 34. A spring 40 is sleeved on the outside of one of the guide rods 39. A fixing block 41 is slidably sleeved on the top of the second moving block 38. The fixing block 41 cooperates with the positioning groove 36. A spring 42 is fixedly installed between the bottom of the fixing block 41 and the inner wall of the second moving block 38.

[0040] Working principle: In use, two fixed rods 7 and two fixed rods 8 are fixedly installed on the top of the detection box 1. Two operating mechanisms are used to move the two fixed mechanisms 1 and 2 accordingly. The movement process of one operating mechanism and the corresponding fixed mechanism 1 and fixed mechanism 2 is as follows: Rotate the adjusting rod 23, the adjusting rod 23 descends along the fixed rod 7, the lifting plate 24 slides down along the two guide rods 25, and drives the transmission rod 30 to slide inside the transmission groove 29. The transmission rod 30 acts on the moving block 26, the moving block 26 is forced to drive the fixed block 27 to slide outward, and the T-shaped slider 32 at the bottom of the moving block 26 slides inside the T-shaped groove 31. When the adjusting rod 23 slides down to the bottom, the moving block 26 is located at the outermost position, and the fixed block 27 extends to the outside of the fixed rod 7. At the same time, as the adjusting rod 23 rotates, the protruding block 33 on its outside rotates synchronously. The protruding block 33 is misaligned with the corresponding push plate 37. Under the action of the spring 30, the moving block 28 drives the fixed block 21 to move downward along the two guide rods 29. The bottom of the moving block 28 acts on the push plate 37, and the push plate 37 is forced to move towards the side closer to the protruding block 33. At this time, the fixed block 21 is retracted into the inner cylinder 34 and disengages from the positioning groove 26, thereby disconnecting the connection between the inner cylinder 34 and the outer cylinder 35.

[0041] Then, pull the two fixing rods 7 and 8 to both sides to unfold the whole structure. After unfolding, insert the two fixing rods 7 into the locking rings 21 with positioning grooves 22, and insert the two fixing rods 8 into the other two locking rings 21. When the two fixing rods 7 are fully inserted, under the action of the two springs 28, the two fixing blocks 27 are inserted into their respective positioning grooves 22, thus fixing the two fixing rods 7 and the two locking rings 21, and fixing the two fixing rods 7 and the two fixing rods 8 to the top of the testing box 1.

[0042] When inserting the charging gun into the interface module 3 for testing, first insert the port of the charging gun into the interface module 3 a certain distance. Then, two pushing mechanisms assist in fully inserting the charging gun into the interface module 3. Two cylinders 10 are activated, causing the two T-shaped frames 11 to descend. At this time, the two T-shaped frames 11 cause their corresponding T-shaped sliders 12 to slide within their respective T-shaped grooves 15. The two clamping blocks 14 are then forced to move their two side limit sliders 16 within their respective limit grooves 13. The two clamping blocks 14 simultaneously slide inwards, thus clamping the charging gun. The two rubber pads 17 provide protection for the surface of the charging gun. After the two clamping blocks 14 have fully clamped and fixed the charging gun, as the two cylinders 10 continue to move the T-shaped frames 11 downwards, the two clamping blocks 14 also move downwards synchronously, causing the two connecting rods 9 to move along... The charging gun moves downwards along the two fixed rods 7 and 8 respectively. The four springs 20 are compressed, and the two clamping blocks 14 can then fully insert the charging gun into the interface module 3. The detection box 1 directly displays whether the charging pile is abnormal and uploads the detection results to the intelligent power distribution system, triggering a maintenance work order or updating the pile's health status. After the detection is completed, the two cylinders 10 move upwards, and the two clamping blocks 14 first pull the charging gun out of the interface module 3. Then, the two clamping blocks 14 move away from each other, thus moving away from the charging gun. Maintenance personnel can easily remove the charging gun, solving the problem in existing technologies where slight deformation occurs due to collisions with other objects, making it difficult to insert the charging gun into the interface module 3. Maintenance personnel can easily insert or remove the charging gun from the interface module 3, saving effort when testing multiple charging piles.

[0043] After the testing is completed, reverse the two adjusting rods 23, causing the two moving blocks 26 to retract the two fixed blocks 27 into the interior of the two fixed rods 7. At this time, the two moving blocks 38 cause the two fixed blocks 41 to extend out of the interior of the two inner cylinders 34, allowing the two fixed rods 7 and 8 to be removed directly. By pushing the two fixed rods 7 and 8, the two outer cylinders 35 slide inside the two inner cylinders 34 until the two fixed blocks 41 align with the two positioning slots 36. Under the action of the two springs 42, the two fixed blocks 41 insert into the two positioning slots 36, fixing the two outer cylinders 35 to the two inner cylinders 34. The distance between the two fixed rods 7 and 8 is fixed, reducing the overall size and making it easy to carry. The storage box 6 allows the device to be stored inside. The three handles 4 and four wheels 5 facilitate the carrying of the DC charging pile testing device by maintenance personnel.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable DC charging pile testing device, comprising a testing box (1), a box cover (2) rotatably mounted on one end of the top of the testing box (1), and an interface module (3) fixedly mounted on one end of the top of the testing box (1), characterized in that: The top of the test box (1) near the interface module (3) is provided with two fixing rods 1 (7) and two fixing rods 2 (8). The outer ends of the tops of the two fixing rods 1 (7) and the outer ends of the tops of the two fixing rods 2 (8) are slidably fitted with connecting rods (9). The bottom of the two connecting rods (9) is provided with a pushing mechanism for clamping the charging gun and pushing it to move axially to insert into or pull out of the interface module (3). The two ends of the bottom of the two connecting rods (9) are fixedly installed with limiting seats 1 (18). The middle of the two fixing rods 1 (7) and the two fixing rods 2 (8) are fixedly installed with limiting seats 2 (19). The outer ends of the two fixing rods 1 (7) and the two fixing rods 2 (8) are fitted with springs 1 (20). The two ends of the four springs 1 (20) are fixedly connected to their respective limiting seats 1 (18) and limiting seats 2 (19).

2. The portable DC charging pile testing device according to claim 1, characterized in that: The outer side of the testing box (1) is rotatably mounted with three handles (4), and two symmetrically arranged rollers (5) are fixedly mounted at both ends of the bottom of the testing box (1). A storage box (6) is slidably mounted on one end of the testing box (1).

3. The portable DC charging pile testing device according to claim 1, characterized in that: The pushing mechanism includes a cylinder (10) and two frames (44). The tops of the two frames (44) are respectively fixedly sleeved on both ends of the connecting rod (9). Limiting grooves (13) are opened at both ends of the bottom of the two frames (44). A clamping block (14) is provided between the two frames (44). A T-shaped frame (11) is fixedly installed at the telescopic shaft end of the cylinder (10). T-shaped sliders (12) are fixedly installed at both ends of the bottom of the T-shaped frame (11). T-shaped grooves (15) are opened at both ends of the top of the clamping block (14). The two T-shaped sliders (12) are slidably installed inside the two T-shaped grooves (15). Limiting sliders (16) are fixedly installed on both sides of the clamping block (14). The two limiting sliders (16) are slidably installed inside their respective limiting grooves (13).

4. The portable DC charging pile testing device according to claim 3, characterized in that: Support plates (43) are fixedly installed on the bottom of the two fixed rods (7) and the bottom of the two fixed rods (8). The tops of the two support plates (43) are fixedly installed on the two cylinders (10). Rubber pads (17) are fixedly installed on the opposite sides of the two clamping blocks (14).

5. The portable DC charging pile testing device according to claim 1, characterized in that: Four locking rings (21) are fixedly installed on the top of the test box (1) near the interface module (3). The four locking rings (21) are symmetrically distributed in pairs on both sides of the interface module (3). The two fixing rods (7) and the two fixing rods (8) cooperate with the four locking rings (21) respectively. The locking rings (21) at the bottom of the two fixing rods (7) are provided with positioning grooves (22). The two fixing rods (7) are provided with operating mechanisms and fixing mechanisms.

6. The portable DC charging pile testing device according to claim 5, characterized in that: The operating mechanism includes an adjusting rod (23), the top of which is threadedly connected to a fixed rod (7), the bottom of which is rotatably mounted inside the fixed rod (7), a lifting plate (24) is rotatably mounted on the bottom of the adjusting rod (23), and guide rods (25) are slidably sleeved on both ends of the lifting plate (24). Both guide rods (25) are fixedly mounted inside the fixed rod (7), and a protrusion (33) is fixedly mounted on the outside of the adjusting rod (23).

7. A portable DC charging pile testing device according to claim 6, characterized in that: The fixing mechanism includes a moving block (26), a fixing block (27) is slidably installed at one end of the moving block (26), the fixing block (27) cooperates with the positioning groove (22), a spring (28) is fixedly installed between the side of the fixing block (27) away from the positioning groove (22) and the inside of the moving block (26), a transmission groove (29) is opened at the end of the moving block (26) away from the fixing block (27), a transmission rod (30) is movably installed inside the transmission groove (29), the top of the transmission rod (30) is fixedly connected to the lifting plate (24), a T-shaped sliding groove (31) is opened at the bottom of the moving block (26), and a T-shaped slider (32) that cooperates with the T-shaped sliding groove (31) is opened at the bottom of the fixing rod (7).

8. A portable DC charging pile testing device according to claim 6, characterized in that: One of the connecting rods (9) has an inner cylinder (34) fixedly installed at both ends, and the other connecting rod (9) has an outer cylinder (35) fixedly installed at both ends. The ends of the two inner cylinders (34) away from the connecting rods (9) to which they are connected are slidably sleeved inside the two outer cylinders (35). The two inner cylinders (34) are each provided with a fixing mechanism II. The ends of the two outer cylinders (35) near the inner cylinders (34) are each provided with a positioning groove II (36).

9. A portable DC charging pile testing device according to claim 8, characterized in that: The second fixing mechanism includes a push plate (37) and a second moving block (38). The push plate (37) cooperates with the protrusion (33). The push plate (37) is slidably fitted inside the inner cylinder (34). Guide rods (39) are slidably sleeved at both ends of the second moving block (38). Both guide rods (39) are fixedly installed inside the inner cylinder (34). A spring (40) is sleeved on the outside of one of the guide rods (39). A fixing block (41) is slidably sleeved on the top of the second moving block (38). The fixing block (41) cooperates with the second positioning groove (36). A spring (42) is fixedly installed between the bottom of the fixing block (41) and the inner wall of the second moving block (38).

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