Charging plug plugging test device for new energy bus

Abstract

The invention provides a charging plug plugging test device for a new energy bus, which relates to the field of charging plug plugging test and comprises a base, a test frame, a stepping motor and a test electric cylinder. A motor shaft of the stepping motor is fixedly connected with the lower end of the test frame; the upper side of the U-shaped jack A is provided with a second charging plug retention structure, the top end of the upper cavity of the test frame is provided with two groups of upper connection plugboards, and the bottom sides of the two groups of upper connection plugboards are provided with joint anti-drop structures. Storage batteries are installed in the two sets of clamping frames correspondingly, and connector anti-disengaging structures are arranged on the top sides of the two sets of lower connecting inserting plates correspondingly. A first charging plug fixing structure is arranged on the outer side of the first charging plug mounting jack, and a test lamp is screwed in the lamp holder. According to the invention, plugging tests of the charging head in different directions can be realized, the integrity of the plug in the plugging process can be effectively monitored, the charging plugs of various sizes are compatible, and the problems of low efficiency and lack of a special test device in manual plugging tests are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of charging plug plugging and unplugging testing, and in particular to a charging plug plugging and unplugging testing device for a new energy bus. Background Art

[0002] With the rapid development of new energy vehicle technology, new energy buses, as an important part of urban public transportation, have received more and more attention for their performance stability and safety. During the operation of new energy buses, the charging plug is frequently plugged in and out. Therefore, the plug-in life and plug-in force of the charging plug have become important indicators for evaluating the performance of the charging interface.

[0003] However, there are some problems with the existing charging plug plug test method: on the one hand, manual plug and unplug testing is not only inefficient, but also easily affected by human errors, resulting in inaccurate test results; on the other hand, the lack of specialized testing equipment makes the test process difficult to standardize and automate, further affecting the reliability and accuracy of the test results.

[0004] In order to solve the above problems and improve the efficiency and accuracy of the plug-in and pull-out test of the new energy bus charging plug, it is necessary to design a special plug-in and pull-out test device. Summary of the invention

[0005] In order to solve the problems in the background technology, the present invention provides a charging plug plugging and unplugging test device for new energy buses, which can realize the plugging and unplugging test of the charging head in different directions and effectively monitor the integrity of the plug during the plugging and unplugging process, and is compatible with charging plugs of various sizes.

[0006] The present invention provides a charging plug plug-in test device for a new energy bus, which specifically includes: a base, a test stand, a stepper motor and a test electric cylinder; The bottom and rear ends of the test frame are arc-shaped structures and are respectively placed on the T-shaped bottom plate and the L-shaped bottom plate of the base; The stepper motor is fixed on the T-shaped bottom plate, and the motor shaft of the stepper motor passes through the vertical plate of the T-shaped bottom plate and is fixedly connected to the lower end of the test frame. A connecting shaft is also fixed on the other side of the lower end of the test frame, and the outer end of the connecting shaft is rotatably inserted into the L-shaped bottom plate; The left and right ends of the upper cavity of the test frame are respectively provided with square rails, and an adjustment plate is slidably mounted thereon, two groups of U-shaped sockets A are arranged on the adjustment plate, and a second charging plug retaining structure is arranged on the upper side of the U-shaped sockets A, two groups of upper connecting plugs are respectively installed on the top of the upper cavity of the test frame, and the bottom sides of the two groups of upper connecting plugs are also respectively provided with joint anti-detachment structures; The test electric cylinder is installed in the concave cavity in the middle of the top of the test frame, and the telescopic end of the test electric cylinder passes through the concave cavity and is fixedly connected to the middle of the adjustment plate; Two sets of card frames and two sets of lower connecting plug boards are respectively installed at both ends of the lower cavity of the test frame, and batteries are respectively installed in the two sets of card frames. The top sides of the two sets of lower connecting plug boards are respectively provided with joint anti-drop structures, and the lower connecting plug boards are respectively connected to the batteries through wires; A first charging plug mounting socket is provided on the middle horizontal plate of the test stand, and a first charging plug retaining structure is provided on the outer side of the first charging plug mounting socket. Lamp holders are respectively provided at both ends of the top of the test stand, and the upper connecting plug plates are respectively connected to the lamp holders through wires, and the lamp holders are also connected to the battery through wires, and a test lamp is screwed into the lamp holders.

[0007] Furthermore, the joint anti-drop structure includes a clamping plate, a U-shaped socket B and a vertical guide column A; The positioning pressure plates are respectively arranged on the upper side of the lower connecting plug plate and the lower side of the upper connecting plug plate, and the positioning pressure plates are respectively provided with three groups of U-shaped holes B corresponding to the interfaces of the lower connecting plug plate and the upper connecting plug plate. Vertical guide columns A are respectively slidably inserted through the two ends of the positioning pressure plates, and the vertical guide columns A pass through the positioning pressure plates and are equipped with springs and a limiting circular plate.

[0008] Furthermore, the first charging plug retaining structure includes an outer fixing sleeve, a locking screw, a transverse guide column and a positioning plug; The front and rear sides of the outer fixing sleeve are arc-shaped structures respectively, one end is an open structure, and the other end is a square frame structure. Two sets of locking screws are respectively screwed on the arc-shaped structures on the front and rear sides of the outer fixing sleeve. A horizontal guide column is slidably inserted into the square frame structure of the outer fixing sleeve, and a spring is mounted on the horizontal guide column, and a positioning plug is connected after passing through the square frame.

[0009] Furthermore, the main body of the transverse guide column is a cylindrical structure, and the front and rear sides of the transverse guide column are respectively provided with protruding arc-shaped locking strips.

[0010] Furthermore, the second charging plug retaining structure includes a positioning support plate, a U-shaped socket C, a positioning frame and a vertical guide column B; The positioning support plates are respectively placed on the upper side of the adjusting pressure plates, and the U-shaped sockets C on the positioning support plates are opposite to the U-shaped sockets A. Positioning frames are respectively provided in the middle of the rear sides of the positioning support plates. Vertical guide columns B are respectively slidably inserted through the two ends of the positioning support plates, and the vertical guide columns B are upwardly passed through the positioning support plates and are provided with springs, and a limiting circular plate.

[0011] Furthermore, the second charging plug retaining structure also includes a rotating plate, a U-shaped frame, an arc-shaped retaining plate, a vertical plate and a limiting screw; One end of the rotating plate is rotatably mounted on one side of the U-shaped socket A of the adjusting pressure plate, and a U-shaped frame is slidably inserted on the arc structure in the middle of the rotating plate, and a spring is mounted on the U-shaped frame and fixedly connected to the arc-shaped retaining plate. The vertical plate is fixed on the other side of the U-shaped socket A of the adjusting pressure plate, and a limiting screw is screwed on the outer protrusion of the vertical plate through a threaded hole.

[0012] Furthermore, the front end of the limiting screw is connected to an optical axis, and after the other end of the rotating plate is rotated to engage with the vertical plate, the optical axis at the front end of the limiting screw is rotated to engage with the convex strip on the outer side of the rotating plate.

[0013] Furthermore, the test frame is driven by the stepper motor to flip backwards by 90°, and the back of the upper end of the test frame is flush with the bottom ends of the T-shaped bottom plate and the L-shaped bottom plate.

[0014] The present invention provides a charging plug plugging and unplugging test device for a new energy bus, which has the following beneficial effects: The present invention aims to realize the plugging and unplugging test of the charging head in different directions and effectively monitor the integrity of the plug during the plugging and unplugging process, while being compatible with charging plugs of various sizes.

[0015] Specifically, when the bottom end of the first charging plug is inserted into the first charging plug mounting socket, the horizontal guide column can be simply pressed to drive the positioning block to move precisely to the notch on the first charging plug to achieve precise positioning. Subsequently, the intervention of the locking screw further ensures the firm fixation of the first charging plug; for the second charging plug, it is cleverly placed in the U-shaped socket A and the U-shaped socket C, and the spring-driven positioning support plate provides the necessary support. By rotating the rotating plate and adjusting the limit screw, coupled with the elastic force of the spring, the arc-shaped retaining plate can fit tightly to the front end of the second charging plug, thereby adapting to the testing requirements of charging plugs of different sizes.

[0016] In addition, the present invention also introduces a joint anti-drop structure, which utilizes the cooperation between the U-shaped socket B and the upper and lower connecting plug plates, plus the elastic force of the spring on the vertical guide column A, to drive the clamping plate to tightly clamp the connecting joint, effectively preventing it from falling off during the test process.

[0017] In order to intuitively monitor the impact of plugging and unplugging operations on the plug, the present invention integrates a battery and a test light system. Under the drive of the test electric cylinder, the pressure plate is adjusted to perform the plugging and unplugging action. At the same time, the test light instantly feeds back the status of the plug, which is convenient for immediate discovery of damage.

[0018] It is worth mentioning that the present invention is also equipped with a stepper motor, which can drive the test frame to rotate 90° so that the test frame is in a flat state. This design allows testing the impact of different plug-in directions on the first charging plug and the second charging plug, further improving the comprehensiveness and practicality of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0020] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached picture: Figure 1 A schematic diagram showing the overall structure of the present invention; Figure 2 The present invention is shown Figure 1 A is an enlarged structural diagram; Figure 3 The present invention is shown Figure 1 The enlarged structural diagram at B in FIG. Figure 4 The present invention is shown Figure 1 A schematic diagram of the rear side view structure in FIG. Figure 5 The present invention is shown Figure 1 Schematic diagram of the front structure; Figure 6 The present invention is shown Figure 1 Schematic diagram of the structure after the middle test frame is rotated backwards 90°; Figure 7 The present invention is shown Figure 6 The enlarged structural diagram at C in FIG. Figure 8 The present invention is shown Figure 1 Schematic diagram of the structure after the test electric cylinder drives the adjustment pressure plate to move upward to pull the second charging plug out of the first charging plug.

[0022] Fig. 9 The present invention is shown Figure 8 Schematic diagram of the structure after the second charging plug and the first charging plug are removed.

[0023] Fig.10 The present invention is shown Fig. 9 The enlarged structural diagram at D in the figure.

[0024] Fig.11 The present invention is shown Fig. 9 Schematic diagram of the side tilt structure.

[0025] Reference numerals list 1. Base; 101. T-shaped bottom plate; 102. L-shaped bottom plate; 1021. Connecting shaft; 2. Test stand; 201. Square rail; 202. Adjustment plate; 2021. U-shaped socket A; 203. Card frame; 204. Lower connecting plug board; 205. First charging plug installation socket; 206. Upper connecting plug board; 207. Lamp holder; 3. Stepper motor; 4. Test the electric cylinder; 5. Battery; 6. Joint anti-drop structure; 601. Positioning pressure plate; 6011. U-shaped socket B; 602. Vertical guide column A; 7. First charging plug retaining structure; 701. External fixing sleeve; 702. Locking screw; 703. Horizontal guide column; 704. Positioning plug; 8. Second charging plug retaining structure; 801. Positioning support plate; 8011. U-shaped socket C; 8012. Positioning frame; 802. Vertical guide column B; 803. Rotating plate; 8031. U-shaped frame; 804. Arc retaining plate; 805. Vertical plate; 806. Limiting screw; 9. Test light. DETAILED DESCRIPTION

[0026] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0027] Example 1: Please refer to Figures 1 to 11 : The present invention proposes a charging plug plugging and unplugging test device for a new energy bus, comprising: a base 1, a test frame 2, a stepper motor 3 and a test electric cylinder 4; The bottom and rear ends of the test stand 2 are both arc-shaped structures and are respectively placed on the T-shaped bottom plate 101 and the L-shaped bottom plate 102 of the base 1; The stepper motor 3 is fixed on the T-shaped bottom plate 101, and the motor shaft of the stepper motor 3 passes through the vertical plate of the T-shaped bottom plate 101 and is fixedly connected to the lower end of the test frame 2. A connecting shaft 1021 is also fixed to the other side of the lower end of the test frame 2, and the outer end of the connecting shaft 1021 is rotatably inserted on the L-shaped bottom plate 102; The left and right ends of the upper cavity of the test frame 2 are respectively provided with square rails 201, and an adjusting plate 202 is slidably mounted thereon. Two groups of U-shaped sockets A2021 are arranged on the adjusting plate 202, and a second charging plug retaining structure 8 is arranged on the upper side of the U-shaped sockets A2021. Two groups of upper connecting plugs 206 are respectively installed on the top of the upper cavity of the test frame 2, and the bottom sides of the two groups of upper connecting plugs 206 are also respectively provided with a joint anti-detachment structure 6; The test electric cylinder 4 is installed in the concave cavity in the middle of the top of the test frame 2, and the telescopic end of the test electric cylinder 4 passes through the concave cavity and is fixedly connected to the middle of the adjustment plate 202; Two sets of card frames 203 and two sets of lower connecting plug plates 204 are respectively installed at both ends of the lower cavity of the test frame 2, and batteries 5 are respectively installed in the two sets of card frames 203. The top sides of the two sets of lower connecting plug plates 204 are respectively provided with joint anti-detachment structures 6, and the lower connecting plug plates 204 are respectively connected to the batteries 5 through wires; A first charging plug mounting socket 205 is provided on the middle horizontal plate of the test frame 2, and a first charging plug retaining structure 7 is provided on the outer side of the first charging plug mounting socket 205. Lamp holders 207 are provided at both ends of the top of the test frame 2, and the upper connecting plug plate 206 is connected to the lamp holders 207 through wires. The lamp holders 207 are also connected to the battery 5 through wires, and a test lamp 9 is screwed into the lamp holders 207.

[0028] In the embodiment of the present invention, Figure 2 and Figure 7 As shown, the connector anti-detachment structure 6 includes a positioning pressure plate 601, a U-shaped socket B6011 and a vertical guide column A602; the positioning pressure plate 601 is respectively arranged on the upper side of the lower connecting plug plate 204 and the lower side of the upper connecting plug plate 206, and the positioning pressure plate 601 is respectively provided with three groups of U-shaped sockets B6011 corresponding to the interfaces of the lower connecting plug plate 204 and the upper connecting plug plate 206, the two ends of the positioning pressure plate 601 are respectively slidably inserted with vertical guide columns A602, and the vertical guide column A602 passes through the positioning pressure plate 601 and is equipped with a spring, and is provided with a limiting circular plate, and the U-shaped socket B6011 cooperates with the upper connecting plug plate 206 and the lower connecting plug plate 204, and the elastic force of the spring on the vertical guide column A602 is used to drive the positioning pressure plate 601 to tightly clamp the connecting joint, thereby effectively preventing the connecting joint from falling off during the test process.

[0029] In the embodiment of the present invention, Fig.10 As shown, the first charging plug retaining structure 7 includes an outer fixing sleeve 701, a locking screw 702, a transverse guide column 703 and a positioning plug block 704; the front and rear sides of the outer fixing sleeve 701 are arc structures respectively, one end is an open structure, and the other end is a square frame structure, two groups of locking screws 702 are respectively screwed on the arc structures on the front and rear sides of the outer fixing sleeve 701, and the square frame structure of the outer fixing sleeve 701 is slidably inserted with a transverse guide column 703, and the transverse guide column 703 is sleeved with a spring, and is connected to a positioning plug block 704 after passing through the square frame, so that the first charging plug can be fixed in place and adapted to charging plugs of different sizes.

[0030] In the embodiment of the present invention, Fig.10As shown, the main body of the transverse guide column 703 is a cylindrical structure, and the front and rear sides of the transverse guide column 703 are respectively provided with protruding arc-shaped locking strips, and the positioning block 704 can be driven to move to the notch on the first charging plug by pressing the transverse guide column 703 to achieve precise positioning.

[0031] In the embodiment of the present invention, Figure 3 and Fig.10 As shown, the second charging plug retaining structure 8 includes a positioning support plate 801, a U-shaped socket C8011, a positioning frame 8012, a vertical guide column B802, a rotating plate 803, a U-shaped frame 8031, an arc-shaped retaining plate 804, a vertical plate 805 and a limiting screw 806; the positioning support plates 801 are respectively placed on the upper side of the adjusting pressure plate 202, and the U-shaped socket C8011 on the positioning support plate 801 is opposite to the U-shaped socket A2021, and a positioning frame 8012 is respectively provided in the middle of the rear side of the positioning support plate 801, and vertical guide columns B802 are respectively slidably inserted at both ends of the positioning support plate 801, and the vertical guide columns B802 are slidably inserted into the vertical guide columns B802. A spring is mounted on the upper positioning support plate 801, and a limiting circular plate is provided. One end of the rotating plate 803 is rotatably installed on one side of the U-shaped socket A2021 of the adjusting pressure plate 202, and a U-shaped frame 8031 ​​is slidably inserted on the arc structure in the middle of the rotating plate 803, and the U-shaped frame 8031 ​​is mounted with a spring and is fixedly connected to the arc-shaped retaining plate 804. The vertical plate 805 is fixed on the other side of the U-shaped socket A2021 of the adjusting pressure plate 202, and a limiting screw 806 is screwed on the outer protrusion of the vertical plate 805 through a threaded hole, which can fix the second charging plug in place and is suitable for charging plugs of different sizes.

[0032] In the embodiment of the present invention, Figure 3 As shown, the front end of the limit screw 806 is connected to the optical axis, and after the other end of the rotating plate 803 is rotated to engage with the vertical plate 805, the optical axis at the front end of the limit screw 806 is rotated to engage with the convex strip on the outside of the rotating plate 803. After the rotating plate 803 and the vertical plate 805 are engaged, they can be engaged by the limit screw 806.

[0033] In the embodiment of the present invention, Figure 6 As shown, the test frame 2 is flipped 90° to the rear side driven by the stepper motor 3, and the back of the upper end of the test frame 2 is flush with the bottom ends of the T-shaped bottom plate 101 and the L-shaped bottom plate 102. During the test, the stepper motor 3 can also be used to drive the test frame 2 to rotate 90° so that the test frame 2 is in a lying state, and the effects of different plugging and unplugging directions on the first charging plug and the second charging plug are tested, thereby improving the comprehensiveness and practicality of the test.

[0034] Specific usage and function of this embodiment: In the present invention, when the bottom end of the first charging plug is first inserted into the first charging plug installation socket 205, the horizontal guide column 703 is pressed to drive the positioning plug 704 to move to the notch on the first charging plug to achieve positioning. Subsequently, the first charging plug is fixed by using the locking screw 702, and the connecting connector of the first charging plug is passed through the U-shaped socket B6011 of the lower clamping plate 601 and inserted into the lower connecting plug plate 204 to achieve connection. Under the action of the spring on the vertical guide column A602, the clamping plate 601 is driven to tightly clamp the connecting connector of the first charging plug. By pressing the positioning support plate 801, the second charging plug is placed in the U-shaped socket A2021 and the U-shaped socket C8011, and the positioning block at the rear end of the second charging plug is inserted into the positioning frame 8012. The positioning support plate 801 is used to support the second charging plug under the drive of the spring, and the rotating plate 803 is rotated to engage with the vertical plate 805, and then the limiting screw 806 is used to position it. Under the elastic action of the spring, the arc-shaped retaining plate 804 is used to tightly fit the front side end of the second charging plug, and the connecting connector of the second charging plug is passed through the U-shaped socket B6011 of the upper positioning pressure plate 601 and inserted into the upper connecting plug plate 206 to achieve connection. Under the action of the spring on the vertical guide column A602, the positioning pressure plate 601 is driven to tightly clamp the connecting connector of the second charging plug; Driven by the test electric cylinder 4, the pressure plate 202 is adjusted to perform the plugging and unplugging action. The plugging and unplugging of the second charging plug and the first charging plug are used to realize the on-off of the circuit, and the state of the charging plug is judged by observing the on and off of the test light 9. During the test, the test frame 2 can also be driven by the stepper motor 3 to rotate 90° so that the test frame 2 is in a lying state, and the effects of different plugging and unplugging directions on the first charging plug and the second charging plug are tested, thereby improving the comprehensiveness and practicality of the test.

[0035] In this article, there are a few points to note: 1. The drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention, and other structures can refer to the general design.

[0036] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0037] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A charging plug plug test device for new energy buses, comprising: A base (1), a test frame (2), a stepper motor (3) and a test electric cylinder (4); The rear end of the bottom side of the test stand (2) is an arc-shaped structure, and is respectively placed on the T-shaped bottom plate (101) and the L-shaped bottom plate (102) of the base (1); The invention is characterized in that the stepper motor (3) is fixed on the T-shaped bottom plate (101), and the motor shaft of the stepper motor (3) passes through the vertical plate of the T-shaped bottom plate (101) and is fixedly connected to the lower end of the test frame (2); a connecting shaft (1021) is also fixed on the other side of the lower end of the test frame (2), and the outer end of the connecting shaft (1021) is rotatably inserted on the L-shaped bottom plate (102); The left and right ends of the upper cavity of the test stand (2) are respectively provided with square rails (201), and an adjusting pressure plate (202) is slidably mounted thereon, two groups of U-shaped sockets A (2021) are arranged on the adjusting pressure plate (202), and a second charging plug retaining structure (8) is arranged on the upper side of the U-shaped sockets A (2021), and two groups of upper connecting plug plates (206) are respectively installed on the top of the upper cavity of the test stand (2), and the bottom sides of the two groups of upper connecting plug plates (206) are also respectively provided with a connector anti-detachment structure (6); The test electric cylinder (4) is installed in a concave cavity in the middle of the top end of the test frame (2), and the telescopic end of the test electric cylinder (4) passes through the concave cavity and is fixedly connected to the middle of the adjustment pressure plate (202); Two sets of card frames (203) and two sets of lower connecting plug plates (204) are respectively installed at both ends of the lower cavity of the test frame (2), and storage batteries (5) are respectively installed in the two sets of card frames (203). The top sides of the two sets of lower connecting plug plates (204) are respectively provided with joint anti-detachment structures (6), and the lower connecting plug plates (204) are respectively connected to the storage batteries (5) via wires; A first charging plug installation socket (205) is provided on the middle horizontal plate of the test stand (2), and a first charging plug retaining structure (7) is provided on the outer side of the first charging plug installation socket (205). Lamp holders (207) are provided at both ends of the top of the test stand (2), and the upper connecting plug plate (206) is connected to the lamp holder (207) via a wire. The lamp holder (207) is also connected to the battery (5) via a wire, and a test lamp (9) is screwed into the lamp holder (207).

2. A charging plug plug-in test device for a new energy bus according to claim 1, characterized in that: The joint anti-detachment structure (6) comprises a locking pressure plate (601), a U-shaped socket B (6011) and a vertical guide column A (602); The locking pressure plate (601) is respectively arranged on the upper side of the lower connecting plug plate (204) and the lower side of the upper connecting plug plate (206), and the locking pressure plate (601) is respectively provided with three groups of U-shaped sockets B (6011) corresponding to the interfaces of the lower connecting plug plate (204) and the upper connecting plug plate (206), and vertical guide columns A (602) are respectively slidably inserted at both ends of the locking pressure plate (601), and the vertical guide columns A (602) pass through the locking pressure plate (601) and are sleeved with a spring, and are provided with a limiting circular plate.

3. A charging plug plug-in test device for a new energy bus according to claim 1, characterized in that: The first charging plug retaining structure (7) comprises an outer fixing sleeve (701), a locking screw (702), a transverse guide column (703) and a positioning plug (704); The front and rear sides of the outer fixing sleeve (701) are arc-shaped structures respectively, one end is an open structure, and the other end is a square frame structure. Two sets of locking screws (702) are respectively screwed on the arc-shaped structures on the front and rear sides of the outer fixing sleeve (701). A transverse guide column (703) is slidably inserted into the square frame structure of the outer fixing sleeve (701), and a spring is sleeved on the transverse guide column (703), which passes through the square frame and is connected to a positioning plug (704).

4. A charging plug plug-in test device for a new energy bus according to claim 3, characterized in that: The main body of the transverse guide column (703) is a cylindrical structure, and the front and rear sides of the transverse guide column (703) are respectively provided with protruding arc-shaped locking strips.

5. A charging plug plug-in test device for a new energy bus according to claim 1, characterized in that: The second charging plug retaining structure (8) comprises a retaining support plate (801), a U-shaped socket C (8011), a positioning frame (8012) and a vertical guide column B (802); The positioning support plates (801) are respectively placed on the upper side of the adjustment pressure plate (202), and the U-shaped socket C (8011) on the positioning support plates (801) is opposite to the U-shaped socket A (2021), and a positioning frame (8012) is respectively provided in the middle of the rear side of the positioning support plates (801), and vertical guide columns B (802) are respectively slidably inserted at both ends of the positioning support plates (801), and the vertical guide columns B (802) pass through the positioning support plates (801) upwards and are provided with springs, and a limiting circular plate.

6. A charging plug plug-in test device for a new energy bus according to claim 5, characterized in that: The second charging plug retaining structure (8) further comprises a rotating plate (803), a U-shaped frame (8031), an arc-shaped retaining plate (804), a vertical plate (805) and a limiting screw (806); One end of the rotating plate (803) is rotatably mounted on one side of the U-shaped socket A (2021) of the adjusting pressure plate (202), and a U-shaped frame (8031) is slidably inserted into the arc structure in the middle of the rotating plate (803), and a spring is sleeved on the U-shaped frame (8031) and is fixedly connected to the arc-shaped retaining plate (804), and the vertical plate (805) is fixed on the other side of the U-shaped socket A (2021) of the adjusting pressure plate (202), and a limiting screw (806) is screwed on the outer protrusion of the vertical plate (805) through a threaded hole.

7. A charging plug plug-in test device for a new energy bus according to claim 6, characterized in that: The front end of the limiting screw (806) is connected to an optical axis, and after the other end of the rotating plate (803) is rotated to engage with the vertical plate (805), the optical axis at the front end of the limiting screw (806) is rotated to engage with the convex strip on the outside of the rotating plate (803).

8. A charging plug plug-in test device for a new energy bus according to claim 1, characterized in that: The test frame (2) is turned backwards by 90° when driven by the stepping motor (3), and the back surface of the upper end of the test frame (2) is flush with the bottom ends of the T-shaped bottom plate (101) and the L-shaped bottom plate (102).

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