Test device

Abstract

The embodiment of the present application provides a test device. The test device comprises a base, a first support structure, a second support structure and an execution member. The first support structure comprises a first guide structure and a support assembly. The first guide structure is arranged on the base. The support assembly is connected with the first guide structure and is movable on the first guide structure in a first direction. The support assembly comprises a support body and a buffer. The support body has a receiving cavity. The buffer is arranged on the inner wall of the receiving cavity. The buffer is used for wrapping a charging gun. The buffer can be elastically deformed when the charging gun deviates. The second support structure is connected with the base. The second support structure is used for mounting a socket. The execution member is arranged on the side, away from the second support structure, of the first support structure. The execution member is used for exerting a pushing force or a pulling force on the charging gun, so that the charging gun is inserted into the socket or pulled out of the socket. The test device provided by the embodiment of the present application can improve the accuracy of the test result of the plug-in and pull-out force of the charging gun.

Description

Technical Field

[0001] This application relates to the field of charging technology, and in particular to a testing device. Background Technology

[0002] With the rapid development of electric vehicles, the charging gun, as a high-frequency connection component for charging electric vehicles, has its insertion and extraction force directly related to charging safety and user experience. Therefore, it is necessary to test the insertion and extraction force of the charging gun.

[0003] The insertion and extraction force of a charging gun can be tested using testing equipment. This equipment includes a clamp and a support. The clamp holds the charging gun, and the socket is mounted on the support. A motor drives the clamp to move, causing the charging gun to insert into or remove from the socket to measure the insertion and extraction force. If there is a deviation between the charging gun and the socket along the insertion / extraction direction, or if the charging gun is tilted relative to the socket, additional friction and lateral forces will be generated during testing, resulting in inaccurate insertion and extraction force measurements. Therefore, the accuracy of the insertion and extraction force test results for the charging gun is relatively low. Utility Model Content

[0004] This application provides a testing device that can improve the accuracy of charging gun insertion and extraction force test results.

[0005] In a first aspect, embodiments of this application provide a testing device, including a base, a first support structure, a second support structure, and an actuator. The first support structure includes a first guide structure and a support assembly. The first guide structure is disposed on and connected to the base, and its guiding direction is a first direction. The support assembly is connected to the first guide structure and is movable along the first direction on the first guide structure. The support assembly includes a support body and a buffer member. The support body has a receiving cavity, and the buffer member is disposed on the inner wall of the receiving cavity. The buffer member is used to cover the charging gun, and it can elastically deform when the charging gun deviates to adaptively compensate for the positional deviation of the charging gun. The second support structure and the first support structure are arranged along the first direction. The second support structure is connected to the base and is used to install a socket. The actuator is disposed on the side of the first support structure opposite to the second support structure. The actuator is used to apply a pushing or pulling force to the charging gun to insert or pull the charging gun into or out of the socket.

[0006] The testing device provided in this application embodiment comprises a base, a first support structure, a second support structure, and an actuator. The first support structure includes a first guide structure and a support assembly. The first guide structure is disposed on and connected to the base. The support assembly is connected to the first guide structure and is movable along a first direction on the first guide structure; the support assembly includes a support body and a buffer. The support body and the charging gun can move along the first direction on the first guide structure. The second support structure is arranged along the first support structure and the first support structure is connected to the base. The second support structure is used to install a socket. When the actuator applies a pushing or pulling force to the charging gun along the first direction, the charging gun can be inserted into or removed from the socket. If there is a positional deviation between the charging gun and the socket during insertion or removal, the charging gun can compress the buffer. The deformation of the buffer compensates for the positional and angular deviations between the charging gun and the socket, allowing for alignment and correction during insertion. This reduces friction caused by positional deviations, thus minimizing excessive insertion and extraction forces and improving the accuracy of the insertion and extraction force test results. The clamping and driving force of the charging gun is primarily provided by the actuator, reducing the interaction force between the buffer and the charging gun. The deformation of the buffer mainly compensates for positional and angular deviations between the charging gun and the socket, further improving the accuracy of the insertion and extraction force test results.

[0007] In one possible implementation, the testing device provided in this application embodiment has a friction-reducing layer on the surface of the buffer that contacts the charging gun.

[0008] In one possible implementation, the testing apparatus provided in this application further includes a controller, a first driving member, and a second driving member, both electrically connected to the controller. The first driving member is used to drive the support assembly to move; the second driving member is used to drive the actuator to move; and the controller is used to control the synchronization of the movement of the support assembly driven by the first driving member and the movement of the actuator driven by the second driving member. This avoids friction between the support assembly and the charging gun due to relative movement, thereby further improving the accuracy of the insertion / extraction force test results.

[0009] In one possible implementation, the testing device provided in this application further includes an adapter in the first support structure. The adapter includes an adapter body and a second guide structure connected to the adapter body. The adapter body is connected to the first guide structure and is movable along a first direction on the first guide structure. The guide direction of the second guide structure is a second direction. The support body is connected to the second guide structure and is movable along the second direction on the second guide structure, wherein the second direction intersects the first direction. By providing an adapter between the support body and the first guide structure, and providing a second guide structure on the adapter, the support body can be connected to the first guide structure through the adapter, while also allowing the support body to move along the second direction, so that the charging gun and the socket are approximately aligned along the second direction before insertion and removal. This reduces the deformation of the buffer caused by the positional deviation between the charging gun and the socket. The smaller the deformation of the buffer, the smaller the friction between the charging gun and the socket, thereby further reducing the problem of excessive insertion and removal force caused by excessive friction.

[0010] In one possible implementation, the testing device provided in this application includes a support body comprising a first support body and a second support body. Both the first and second support bodies are connected to a second guide structure and are movable along a second direction on the second guide structure. The first and second support bodies jointly support the charging gun. A buffer includes a first buffer and a second buffer. The first buffer is disposed on the side of the first support body facing the second support body and is detachably connected to the first support body. The second buffer is disposed on the side of the second support body facing the first support body and is detachably connected to the second support body. By adjusting the distance between the first and second support bodies along the second direction, the support body can be adapted to charging guns of different diameters, resulting in high compatibility of the support assembly. By replacing the first and second buffers, a better match between the first and second buffers and the outer wall of the charging gun can be achieved, thereby further increasing the compatibility of the support assembly.

[0011] In one possible implementation, the testing device provided in this application includes a second support structure comprising a support portion and a mounting assembly. One end of the support portion along a third direction is connected to a base, and the other end of the support portion along a third direction is connected to the mounting assembly. The support portion is extendable along the third direction, and the mounting assembly is used to mount a socket. The first direction, the second direction, and the third direction intersect each other. The support portion drives the charging gun to move along the third direction, causing the charging gun and the socket to be approximately aligned along the third direction. This reduces the deformation of the buffer caused by positional deviation between the charging gun and the socket, thereby further reducing the problem of excessive insertion and extraction forces due to excessive friction.

[0012] In one possible implementation, the testing device provided in this application includes a mounting assembly comprising a support base, a bracket, and a mounting frame. The support base is connected to a support portion, and the bracket is connected to the support base. The mounting frame is used to mount a socket. The testing device also includes a force sensor, with one end of the force sensor along a first direction connected to the bracket, and the other end of the force sensor along the first direction connected to the mounting frame. The support base provides stable support for the mounting frame and the bracket, thereby reducing the influence of deformation of the support portion on the test value when the force sensor measures pressure or tension, resulting in more accurate measurement results.

[0013] In one possible implementation, the testing device provided in this application includes a support rod in the mounting assembly. One end of the support rod is connected to the mounting frame, and the other end of the support rod is equipped with a roller that can roll on the side of the support facing the mounting frame. By providing the support rod, the support rod can support the mounting frame, reducing the influence of the mounting frame's own weight on the test results. By providing the roller, the frictional force when the mounting frame moves can be reduced, thereby further improving the accuracy of the insertion and extraction force test results.

[0014] In one possible implementation, the testing device provided in this application includes a mounting frame comprising a frame body and a mounting plate. The frame body is connected to a force sensor, and the mounting plate is detachably connected to the frame body. The mounting plate is used to connect to a socket. When testing different models of charging guns and needing to change the socket, simply remove the socket and mounting plate from the frame body and replace it with a mounting plate that matches the other socket. Therefore, the process of changing the socket to match the charging gun is relatively simple when testing different models of charging guns.

[0015] In one possible implementation, the testing device provided in this application further includes a displacement sensor, a force sensor, and a controller. Both the displacement sensor and the force sensor are electrically connected to the controller. The displacement sensor is used to test the displacement of the charging gun relative to the socket, and the force sensor is used to test the insertion and extraction force of the charging gun. The controller is used to acquire the displacement and insertion / extraction force and output a curve showing the relationship between the displacement and the insertion / extraction force. By testing the curve, the insertion and extraction force values ​​at each stage of the charging gun and socket insertion and extraction process can be obtained more accurately, facilitating the analysis of changes in the insertion and extraction force during the charging gun insertion and extraction process. Furthermore, the structure of the charging gun and socket can be optimized based on the changes in the insertion and extraction force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the testing device provided in the embodiments of this application;

[0017] Figure 2 This is a schematic diagram of the structure of the testing device provided in the embodiments of this application;

[0018] Figure 3 A diagram illustrating the usage status of the testing apparatus provided in the embodiments of this application;

[0019] Figure 4 This is a side view of the first support structure in the testing apparatus provided in the embodiments of this application;

[0020] Figure 5 This is another side view of the first support structure in the test apparatus provided in the embodiments of this application;

[0021] Figure 6 This is a schematic diagram of the structure of the mounting plate in the testing device provided in the embodiments of this application;

[0022] Figure 7 Another usage state diagram of the test apparatus provided in the embodiments of this application;

[0023] Figure 8 The test curve of insertion distance-insertion force output by the controller in the test device provided in the embodiments of this application;

[0024] Figure 9 This is another usage state diagram of the test apparatus provided in the embodiments of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10. Testing equipment;

[0027] 100. Base;

[0028] 200. First supporting structure;

[0029] 210. First guide structure; 211. First guide rail; 2111. Protrusion;

[0030] 220. Support components;

[0031] 221. Support body; 221a. First support body; 221b. Second support body;

[0032] 2211, Receiving cavity; 2212, Second snap-fit ​​portion; 2213, First connecting portion; 2214, Second connecting portion;

[0033] 222, Buffer component; 222a, First buffer component; 222b, Second buffer component;

[0034] 230. Adapter parts;

[0035] 231. Adapter body; 2311. First snap-fit ​​part;

[0036] 232. Second guiding structure;

[0037] 300. Second support structure;

[0038] 310. Support section; 311. First support section; 312. Second support section;

[0039] 320. Mounting components; 321. Support base; 322. Bracket;

[0040] 323, Mounting frame; 3231, Frame body; 3232, Mounting plate; 3232a, First mounting hole; 3232b, First fastener; 3232c, Third mounting hole; 3232d, Second fastener; 3232e, Through hole; 324, Support rod; 325, Roller;

[0041] 400. Force sensor; 410. Elastomer; 420. Strain gauge;

[0042] 500. Displacement sensor;

[0043] 600. Controller;

[0044] 700. Actuator; 710. Gripper;

[0045] 810, First driving component; 810a, First motor; 820, Second driving component; 820a, Second motor;

[0046] 900, Link; 910, First Link Segment; 920, Second Link Segment;

[0047] 20. Charging equipment; 21. Charging pile housing; 22. Cables; 23. Charging gun;

[0048] 30. Socket;

[0049] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0050] The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. The implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0051] This application provides a testing device that can improve the accuracy of charging gun insertion and extraction force test results.

[0052] Figure 1 This is a schematic diagram of the charging device.

[0053] See Figure 1As shown, the charging device 20 includes a charging pile housing 21, a cable 22, and a charging gun 23. A power supply component is housed in the charging pile housing 21. One end of the cable 22 is electrically connected to the power supply component, and the other end of the cable 22 is electrically connected to the charging gun 23. An external power supply device can be electrically connected to the power supply component, and the electric vehicle will be charged after being transformed or rectified by the power supply component. Specifically, the electric vehicle is equipped with a socket. When the charging gun 23 is plugged into the charging connector of the electric vehicle, the electrical energy in the power supply component can be transmitted to the electric vehicle through the cable 22 and the charging gun 23 to charge the electric vehicle. The charging pile housing 21 also has a mounting part on its exterior. When charging the electric vehicle is not required, the charging gun 23 can be mounted on the mounting part of the charging pile housing 21.

[0054] When the charging gun 23 is plugged into or unplugged from the vehicle's socket, the insertion and extraction forces must be neither too large nor too small. Excessive force requires the user to exert considerable effort to insert or remove the charging gun, resulting in a poor user experience. Excessive force may scratch the casing of the charging gun 23 and the socket, and may also damage the terminals within the charging gun 23 or the socket. Furthermore, excessive force may cause the user to mistakenly believe the charging gun is fully inserted, when in fact it may not be properly locked, leading to a loose connection and potential safety issues. Insufficient force results in insufficient contact pressure at the internal terminals of the charging gun and the socket, making the connection unreliable, and even minor external force may interrupt charging. Therefore, the insertion and extraction forces of the charging gun 23 and the socket should be kept within a certain range. Insertion and extraction force testing is required during the design or production phases of the charging gun. It is understood that the insertion and extraction force of the charging gun refers to the force required when inserting or removing the charging gun from the socket.

[0055] Figure 2 This is a schematic diagram of the structure of the testing device provided in the embodiments of this application; Figure 3 A diagram illustrating the usage status of the testing apparatus provided in the embodiments of this application; Figure 4 A side view of the first support structure in the test apparatus provided in the embodiments of this application.

[0056] See Figures 2 to 4As shown, the testing device 10 provided in this embodiment includes a base 100, a first support structure 200, a second support structure 300, and an actuator 700. The first support structure 200 includes a first guide structure 210 and a support assembly 220. The first guide structure 210 is disposed on and connected to the base 100, and the guiding direction of the first guide structure 210 is a first direction X. The support assembly 220 is connected to the first guide structure 210 and is movable along the first direction X on the first guide structure 210. The support assembly 220 includes a support body 221 and a buffer member 222. The support body 221 has a receiving cavity 2211, and the buffer member 222 is disposed on the inner wall of the receiving cavity 2211. The buffer member 111 is used to cover the charging gun 23, and the buffer member 222 can elastically deform when the charging gun 23 is offset to adaptively compensate for the positional deviation of the charging gun 23. The second support structure 300 and the first support structure 200 are arranged along the first direction X. The second support structure 300 is connected to the base 100 and is used to install the socket 30.

[0057] Figure 9 This is another usage state diagram of the test apparatus provided in the embodiments of this application.

[0058] See Figure 9 As shown, the actuator 700 is disposed on the side of the first support structure 200 opposite to the second support structure 300. The actuator 700 is used to apply a pushing or pulling force to the charging gun 23 so that the charging gun 23 is inserted into or pulled out of the socket 30.

[0059] Please continue reading Figures 2 to 4 As shown, the base 100 is used to support other components in the test device 10. The base 100 can be a flat base plate. The length direction of the base 100 is the first direction X, the width direction of the base 100 is the second direction Y, and the height direction of the base 100 is the third direction Z.

[0060] A first support structure 200 and a second support structure 300 are arranged on the base 100 along a first direction X. The first support structure 200 is used to mount the charging gun 23, and the second support structure 300 is used to mount the socket 30. The charging gun 23 can move along the first direction X to insert into or remove from the socket 30.

[0061] Specifically, the first support structure 200 includes a first guide structure 210, which includes two first guide rails 211 arranged side by side along the second direction Y. The two first guide rails 211 have protrusions 2111 that protrude away from each other along the second direction Y. The support assembly 220 can be engaged with the protrusions 2111 of the two first guide rails 211 to connect with them. When a force is applied to the support assembly 220, the support assembly 220 can move along the first guide rails 211 in the first direction X.

[0062] The support assembly 220 includes a support body 221, which has a receiving cavity 2211 for accommodating the charging gun 23. A buffer 222 may be provided on the inner wall of the support body 221. The buffer 222 can be a sponge pad, air cushion, rubber pad, etc., and can deform under external force and return to its original shape after the force is removed. When the charging gun 23 is located in the receiving cavity 2211 of the support body 221, the buffer 222 is located between the support body 221 and the charging gun 23.

[0063] The offset of the charging gun 23 includes positional offset and angular deviation. Positional offset refers to the charging gun 23 not being completely aligned with the charging gun 30, for example, the charging gun 23 being offset relative to the charging gun 30 along the first direction X, the second direction Y, or the third direction X. Angular deviation refers to, for example, when the insertion / removal direction is the first direction X, the charging gun 23 having an angle with the first direction X.

[0064] When the charging gun 23 deviates, the buffer 222 can be compressed to produce elastic deformation, thereby compensating for the deviance of the charging gun 23.

[0065] The second support structure 300 is mounted on the base 100, and the second support structure 300 and the first support structure 200 are arranged on the base 100 along the first direction X. The socket 30 is mounted on the second support structure 300, and the side of the second support structure 300 on which the socket 30 is mounted faces the first support structure 200.

[0066] The actuator 700 can be connected to the base 100, which supports the actuator 700. For example, please refer to [link to documentation]. Figure 9As shown, the actuator 700 can be connected to the base 100 via a link 900. The link 900 may include a first link segment 910 and a second link segment 920, which are connected. The first link segment 910 extends along a third direction Z, and the second link segment 920 extends along a first direction X. The first link segment 910 is connected to the base 100, and the actuator 700 is disposed on the second link segment 920. The actuator 700 can move relative to the link 900 along the first direction X. The actuator 700 can also be supported by other support structures on the side of the first support structure 200 opposite to the second support structure 300.

[0067] The actuator 700 can be a clamping member, which includes multiple grippers 710. The spacing between the grippers 710 is adjustable, allowing the actuator 700 to clamp charging guns 23 of different specifications. The actuator 700 is clamped at the end of the charging gun 23 opposite to the second support structure 300. The actuator 700 can apply a pulling or pushing force to the charging gun 23.

[0068] The clamping and driving force of the charging gun 23 is mainly provided by the actuator 700, which applies a pushing or pulling force. This reduces the force exerted on the charging gun 23 by the buffer 222, allowing the deformation of the buffer 222 to primarily compensate for positional and angular deviations between the charging gun 23 and the socket 30, further improving the accuracy of the insertion / extraction force test results. During the insertion / extraction force test, the socket 30 is mounted on the second support structure 300, with the charging gun 23 located in the receiving cavity 2211 of the support body 221. The first support structure 200 or the second support structure 300 is adjusted along the second direction Y, and the first support structure 200 and the second support structure 300 are adjusted along the third direction Z, so that the charging gun 23 and the socket 30 are approximately aligned. The actuator 700 can apply a force to the charging gun 23, causing it to move towards the second support structure 300 and insert into the socket 30. The insertion force of the charging gun 23 is tested during this insertion process. The actuator 700 can apply a force to the charging gun 23, causing the charging gun 23 to move away from the second support structure 300 and pull the charging gun 23 out of the socket 30. The pulling force of the charging gun 23 is tested during the process of pulling the charging gun 23 out of the socket 30.

[0069] If there is a positional deviation between the charging gun 23 and the socket 30 during the process of inserting the charging gun 23 into the socket 30 or pulling the charging gun 23 out of the socket 30, the charging gun 23 can compress the buffer 222. The elastic deformation of the buffer 222 can compensate for the positional and angular deviation between the charging gun 23 and the socket 30, so that the charging gun 23 can be aligned and corrected with the socket 30 at the same time as plugging in. This can reduce the frictional force caused by the positional deviation between the charging gun 23 and the socket 30, thereby reducing the phenomenon of excessive insertion and extraction force caused by excessive friction, and thus improving the accuracy of the insertion and extraction force test results of the charging gun 23.

[0070] In one possible implementation, the surface of the buffer 222 that contacts the charging gun 23 is provided with a friction-reducing layer. This friction-reducing layer can be a solid lubricating coating (e.g., graphite or polytetrafluoroethylene) applied to the surfaces of the buffer 222 and the charging gun 23. This reduces the friction between the buffer 222 and the charging gun 23, thereby further improving the accuracy of the insertion / extraction force test results.

[0071] The following describes the specific alignment method of the charging gun 23 in the first support structure 200 and the socket 30 in the second support structure 300.

[0072] Please continue reading Figures 2 to 4 As shown, in one possible implementation, the first support structure 200 further includes a connector 230, which includes a connector body 231 and a second guide structure 232 connected to the connector body 231. The connector body 231 is connected to the first guide structure 210 and is movable on the first guide structure 210 along a first direction X. The guide direction of the second guide structure 232 is a second direction Y. The support body 221 is connected to the second guide structure 232 and is movable on the second guide structure 232 along the second direction Y.

[0073] The support 221 can be connected to the first guide structure 210 via the adapter 230. Specifically, the adapter 230 includes an adapter body 231 at one end along the third direction Z toward the first guide rail 211, and the adapter body 231 includes first snap-fit ​​portions 2311 at both ends along the second direction Y. The two first snap-fit ​​portions 2311 are respectively snapped onto the protrusions 2111 of the two first guide rails 211, so that the adapter body 231 is connected to the first guide structure 210.

[0074] The adapter 230 includes a second guide structure 232 at one end facing the support assembly 220 along the third direction Z. The second guide structure 232 can also be a guide rail. The extension direction of the second guide structure 232 is the second direction Y. The support body 221 has a second snap-fit ​​portion 2212 on the side facing the second guide structure 232. The second snap-fit ​​portion 2212 snaps onto the second guide structure 232, thereby connecting the support body 221 and the second guide structure 232. When a force along the second direction Y is applied to the support body 221, the support body 221 can move along the second direction Y on the second guide structure 232. Thus, the position of the support body 221 can be adjusted along the second direction Y, so that the charging gun 23 and the socket 30 are approximately aligned along the second direction Y before plugging and unplugging.

[0075] By providing an adapter 230 between the support 221 and the first guide structure 210, and by providing a second guide structure 232 on the adapter 230, the support 221 can be connected to the first guide structure 210 via the adapter 230, while also allowing the support 221 to move along the second direction Y. This ensures that the charging gun 23 and the socket 30 are approximately aligned along the second direction Y before insertion or removal. This reduces the deformation of the buffer 222 caused by positional deviation between the charging gun 23 and the socket 30. The smaller the deformation of the buffer 222, the smaller the friction between the charging gun 23 and the socket 30, thus further reducing the problem of excessive insertion and removal force caused by excessive friction.

[0076] Figure 5 This is another side view of the first support structure in the test apparatus provided in the embodiments of this application.

[0077] See Figure 5 As shown, in one possible implementation, the support body 221 includes a first support body 221a and a second support body 221b. Both the first support body 221a and the second support body 221b are connected to the second guide structure 232 and are movable along the second direction Y on the second guide structure 232. The first support body 221a and the second support body 221b together support the charging gun 23. The buffer member 222 includes a first buffer member 222a and a second buffer member 222b. The first buffer member 222a is disposed on the side of the first support body 221a facing the second support body 221b, and the first buffer member 222a is detachably connected to the first support body 221a. The second buffer member 222b is disposed on the side of the second support body 221b facing the first support body 221a, and the second buffer member 222b is detachably connected to the second support body 221b.

[0078] A second engaging portion 2212 is provided on both the first support body 221a and the second support body 221b. The second engaging portion 2212 on the first support body 221a engages with the second guide structure 232, and the second engaging portion 2212 on the second support body 221b also engages with the second guide structure 232, thus connecting both the first and second support bodies 221a to the second guide structure 232. When a force along the second direction Y is applied to the first support body 221a, the first support body 221a can move along the second direction Y on the second guide structure 232, thereby adjusting its position along the second direction Y. When a force along the second direction Y is applied to the second support body 221b, the second support body 221b can move along the second direction Y on the second guide structure 232, thereby adjusting its position along the second direction Y.

[0079] By making the support body 221 include a first support body 221a and a second support body 221b, and by making both the first support body 221a and the second support body 221b movable on the second guide structure 232, and by adjusting the distance between the first support body 221a and the second support body 221b along the second direction Y, the support body 221 can be adapted to charging guns 23 of different diameters, thus making the support assembly 220 highly compatible.

[0080] The first buffer element 222a can be bonded to the first support 221a using an adhesive. The first buffer element 222a and the first support 221a can also be connected by magnetic attraction; for example, the first support 221a can be made of a magnetic metal, and the first buffer element 222a can be doped with magnetic particles. The first buffer element 222a can also be connected to the first support 221a by other detachable methods.

[0081] The second buffer 222b can be bonded to the second support 221b using an adhesive. The second buffer 222b and the second support 221b can also be connected by magnetic attraction; for example, the second support 221b can be made of a magnetic metal, and the second buffer 222b can be doped with magnetic particles. The second buffer 222b can also be connected to the second support 221b in other detachable ways.

[0082] Therefore, when the outline of the charging gun 23 changes, for example, when the shape of the charging gun 23 changes from a circle to a polygon, the first buffer 222a and the second buffer 222b can be replaced, so that the first buffer 222a and the second buffer 222b are more compatible with the outer wall of the charging gun 23, thereby further increasing the compatibility of the support assembly 220.

[0083] It should be noted that the second support body 221b is provided with a first connecting part 2213 and a second connecting part 2214. After the charging gun 23 is located in the receiving cavity 2211 of the support body 221, the first connecting part 2213 and the second connecting part 2214 can be connected by a connector, so that the support body 221 provides reliable support for the charging gun 23. When it is necessary to remove the charging gun 23, the first connecting part 2213 and the second connecting part 2214 are disconnected, one of the first support body 221a and the second support body 221b is moved, and then the charging gun 23 can be removed.

[0084] The specific structure of the second support structure 300 will be described below.

[0085] Please continue reading Figure 2 and Figure 3 As shown, the second support structure 300 includes a support part 310 and a mounting component 320. One end of the support part 310 along the third direction Z is connected to the base 100, and the other end of the support part 310 along the third direction Z is connected to the mounting component 320. The support part 310 is telescopic along the third direction Z, and the mounting component 320 is used to mount the socket 30.

[0086] In one possible implementation, the support portion 310 can be a sleeve structure, comprising a first support segment 311 and a second support segment 312, which are sleeved together. The first support segment 311 faces and is connected to the base 100. The second support segment 312 faces and is connected to the mounting assembly 320. The second support segment 312 is movable relative to the first support segment 311 in a third direction Z, for example, by being driven by a motor or cylinder. Thus, the support portion 310 can drive the mounting assembly 320 to move in a third direction Z, and the socket 30 is mounted on the mounting assembly 320, allowing the socket 30 to also move in a third direction Z.

[0087] Before plugging or unplugging, the charging gun 23 adjusts the position of the socket 30 along the third direction Z, so that the charging gun 23 and the socket 30 are roughly aligned along the third direction Z. This reduces the deformation of the buffer 222 caused by the positional deviation between the charging gun 23 and the socket 30. The smaller the deformation of the buffer 222, the smaller the friction between the charging gun 23 and the socket 30, which further reduces the problem of excessive plugging and unplugging force caused by excessive friction.

[0088] In addition, by providing a structure on one side of the first support structure 200 that allows the charging gun 23 to move along the second direction Y, and by providing a structure on one side of the second support structure 300 that allows the socket 30 to move along the third direction Z, the structures of the first support structure 200 and the second support structure 300 can be prevented from being too complex.

[0089] Please continue reading Figure 2 and Figure 3 As shown, the mounting assembly 320 includes a support base 321, a bracket 322, and a mounting frame 323; the support base 321 is connected to the support portion 310, and the bracket 322 is connected to the support base 321; the mounting frame 323 is used to mount the socket; the testing device 10 also includes a force sensor 400, one end of the force sensor 400 along the first direction X is connected to the bracket 322, and the other end of the force sensor 400 along the first direction X is connected to the mounting frame 323.

[0090] The support base 321 can be a flat plate structure. The support base 321 is connected to the second support section 312 of the support part 310. The projected area of ​​the support base 321 along the third direction Z can be larger than the projected area of ​​the support part 310 along the third direction Z. The mounting frame 323 and the bracket 322 are both disposed on the support base 321. The bracket 322 is fixedly connected to the support base 321. The mounting frame 323 is located between the first support structure 200 and the bracket 322 along the first direction X. The socket 30 is mounted on the mounting frame 323.

[0091] The force sensor 400 can be a strain gauge force sensor, a piezoelectric force sensor, a capacitive force sensor, or an inductive force sensor. The strain gauge force sensor will be used as an example for explanation.

[0092] Please continue reading Figure 2 and Figure 3 As shown, the force sensor 400 includes an elastic body 410 and a strain gauge 420. The elastic body 410 is connected between the mounting frame 323 and the bracket 322. The elastic body 410 can be made of a metal with high strength and elasticity (e.g., alloy steel, aluminum alloy, etc.). The strain gauge 420 can be bonded to the surface of the elastic body 410. The strain gauge 420 can convert deformation into a change in resistance value, and the change in resistance value is positively correlated with the deformation. There can be multiple strain gauges 420, and the multiple strain gauges 420 are electrically connected.

[0093] The following explanation uses the insertion of the charging gun 23 into the socket 30 as an example. During this process, the socket 30 experiences pressure from the charging gun 23. This pressure is transmitted to the mounting frame 323 and then to the elastic body 410. Since the bracket 322 is fixedly connected to the support base 321, the mounting frame 323 and bracket 322 compress the elastic body 410 from both sides, causing a slight deformation. The strain gauge 420 deforms along with the elastic body 410 and can convert this deformation into a change in resistance, which can then be output. This allows the magnitude of the pressure to be measured based on the change in resistance.

[0094] The support base 321 can provide stable support for the mounting frame 323 and the bracket 322. Therefore, when the force sensor 400 measures pressure or tension, the influence of the deformation of the support part 310 on the test value can be reduced, making the measurement result more accurate.

[0095] Please continue reading Figure 2 and Figure 3 As shown, in one possible implementation, the mounting assembly 320 further includes a support rod 324, one end of which is connected to the mounting frame 323, and the other end of which is provided with a roller 325, which is capable of rolling on the side of the support base 321 facing the mounting frame 323.

[0096] During the insertion and removal of the charging gun 23 from the socket 30, the elastomer 410 undergoes slight deformation, causing the mounting frame 323 to move slightly along the first direction X. If the mounting frame 323 is placed directly on the support base 321, the friction between the mounting frame 323 and the support base 321 is relatively large when the mounting frame 323 moves. This causes part of the insertion and removal force of the charging gun 23 to be used to overcome the friction, resulting in a larger force applied to the charging gun 23. However, the force sensor 400 detects a smaller insertion and removal force, leading to an underestimation of the insertion and removal force test result. If the mounting frame 323 and the support base 321 are spaced apart, the elastomer 410 will undergo slight deformation due to the weight of the mounting frame 323 itself when the charging gun 23 is not inserted or removed. This will also affect the accuracy of the insertion and removal force test result.

[0097] In this embodiment, by providing a support rod 324, the support rod 324 can support the mounting frame 323, reducing the influence of the weight of the mounting frame 323 itself on the test results; by providing rollers 325, the frictional force when the mounting frame 323 moves can be reduced, thereby further improving the accuracy of the insertion and extraction force test results.

[0098] In one possible implementation, the mounting frame 323 includes a frame 3231 and a mounting plate 3232. The frame 3231 is connected to the force sensor 400, and the mounting plate 3232 is detachably connected to the frame 3231. The mounting plate 3232 is used to connect to the socket 30.

[0099] The frame 3231 serves as the supporting body for the mounting frame 323. The frame 3231 has a hollow frame structure, which makes the mounting frame 323 lighter. The mounting plate 3232 is located on the side of the frame 3231 facing the first supporting structure 200. The mounting plate 3232 is detachably connected to the frame 3231.

[0100] Figure 6 This is a schematic diagram of the mounting plate in the testing device provided in the embodiments of this application.

[0101] See Figure 2 , Figure 3 and Figure 6 As shown, in one possible embodiment, the mounting plate 3232 has a plurality of spaced-apart first mounting holes 3232a, and the frame 3231 has second mounting holes (mounting holes in the figure) that correspond one-to-one with the first mounting holes 3232a. A first fastener 3232b is inserted into the first mounting holes 3232a and the second mounting holes to connect the mounting plate 3232 to the frame 3231. In another possible embodiment, the mounting plate 3232 has a snap-fit, and the frame 3231 has a slot. The snap-fit ​​engages with the slot to connect the mounting plate 3232 to the frame 3231.

[0102] Please continue reading Figure 3 and Figure 6 As shown, the mounting plate 3232 also has a plurality of spaced third mounting holes 3232c, and the socket 30 has a fourth mounting hole (not shown in the figure) that corresponds one-to-one with the third mounting holes 3232c. The second fastener 3232d is inserted into the third mounting holes 3232c and the fourth mounting holes to connect the socket 30 to the mounting plate 3232.

[0103] By detachably connecting the mounting plate 3232 to the frame 3231 and mounting the socket 30 on the mounting plate 3232, when testing different models of charging guns 23 and needing to replace the socket 30, it is only necessary to remove the socket 30 and the mounting plate 3232 from the frame 3231 and replace it with a mounting plate 3232 that matches the other socket 30. Therefore, the process of replacing the socket 30 that matches the charging gun 23 when testing different models of charging guns 23 is relatively simple.

[0104] Figure 7 Another usage state diagram of the test apparatus provided in the embodiments of this application.

[0105] See Figure 7 As shown, the testing device 10 also includes a displacement sensor 500 and a controller 600. The displacement sensor 500 and the force sensor 400 are both electrically connected to the controller 600. The displacement sensor 500 is used to test the displacement of the charging gun 23 relative to the socket 30, and the force sensor 400 is used to test the insertion and extraction force of the charging gun 23. The controller 600 is used to acquire the displacement and insertion and extraction force and output the relationship curve between the displacement and insertion and extraction force.

[0106] In one possible implementation, the displacement sensor 500 can be located in the hollow structure of the frame 3231 and connected to the frame 3231. The displacement sensor 500 can be a laser displacement sensor, and a through hole 3232e can be provided on the mounting plate 3232, in which the emitting end of the displacement sensor 500 is inserted.

[0107] The transmitter in the displacement sensor 500 emits a laser beam, which is reflected by the support 221 and received by the receiver in the displacement sensor 500. Based on the trigonometric relationship between the laser emission point, reflection point, and receiving point, the laser displacement sensor 500 can calculate the distance between the support 221 and the laser displacement sensor 500.

[0108] For details, please continue to see Figure 7 As shown, the distance between the support 221 and the laser displacement sensor 500 is the first spacing L. When the charging gun 23 is placed in the support 221, the distance between the end face of the charging gun 23 facing the second support structure 300 and the end face of the support 221 facing the second support structure 300 can be measured; this distance is the second spacing a. When the charging gun 23 is installed in the support 221, the second spacing a remains unchanged. The second spacing a can be obtained by measuring with calipers or other measuring instruments. When the socket 30 and the displacement sensor 500 are installed in the mounting frame 323, the distance between the end face of the socket 30 facing the first support structure 200 and the end face of the displacement sensor 500 facing the first support structure 200 can be measured; this distance is the third spacing b. When the socket 30 and the displacement sensor 500 are installed in the mounting frame 323, the third spacing b remains unchanged. The third spacing b can be obtained by measuring with calipers or other measuring instruments.

[0109] The distance from the end face of the charging gun 23 to the end face of the socket 30 can be measured by the first gap L, the second gap a, and the third gap b. This distance is called the mating distance x, which is equal to |Lab|. It can be understood that when the charging gun 23 contacts the socket 30, the first gap L is less than the sum of the second gap a and the third gap b. The difference between the first gap L and the sum of the second gap a and the third gap b is negative. Therefore, the mating distance x is the absolute value of the difference between the first gap L and the sum of the second gap a and the third gap b.

[0110] The displacement sensor 500 transmits the first gap L to the controller 600, and the controller 600 calculates the interpolation distance x based on the first gap L, the second gap a, and the third gap b.

[0111] The insertion and extraction forces measured by the force sensor 400 are also transmitted to the controller 600. The controller 600 can obtain the test curve of insertion distance-extraction force based on the insertion distance x and the insertion or extraction force (insertion force or extraction force).

[0112] Figure 8 The test curve of insertion distance-insertion force output by the controller in the test device provided in the embodiments of this application.

[0113] See Figure 8 As shown, the insertion and extraction force values ​​of the charging gun 23 at each stage during the insertion and extraction process can be obtained relatively accurately through the test curve. This facilitates the analysis of the changes in the insertion and extraction force of the charging gun 23 during the insertion and extraction process, and also allows for the optimization of the structure of the charging gun 23 and the socket 30 based on the changes in the insertion and extraction force.

[0114] Please continue reading Figure 9 As shown, in one possible implementation, the testing device 10 further includes a first driving member 810 and a second driving member 820, both of which are electrically connected to the controller 600; the first driving member 810 is used to drive the support assembly 220 to move; the second driving member 820 is used to drive the actuator 700 to move; the controller 600 is used to control the movement of the support assembly 220 driven by the first driving member 810 and the movement of the actuator 700 driven by the second driving member 820 to be synchronized.

[0115] The first driving member 810 can drive the support assembly 220 to move along the first direction X. For example, the first driving member 810 can be a first motor 810a, and the shaft of the first motor 810a passes through the adapter 230. When the shaft of the first motor 810a rotates, it can drive the adapter 230 to move along the first direction X. Thus, the support assembly 220 can be driven to move along the first direction X through the adapter 230.

[0116] The second driving member 820 can drive the actuator 700 to move along the first direction X. For example, the second driving member 820 can be a second motor 820a, the shaft of which is inserted in the actuator 700. The second motor 820a can drive the actuator 700 to move along the first direction X on the second link segment 920, thereby driving the charging gun 23 to move along the first direction X through the actuator 700.

[0117] Both the first driving component 810 and the second driving component 820 are electrically connected to the controller 600. The controller 600 controls the first driving component 810 and the second driving component 820 to move synchronously. This allows the support component 220 to move synchronously with the charging gun 23 and makes the amount of movement of the support component 220 and the charging gun 23 in the first direction X the same. This avoids friction between the support component 220 and the charging gun 23 due to relative movement, thereby further improving the accuracy of the insertion and extraction force test results.

[0118] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A testing device, characterized in that, include: Base; A first support structure includes a first guide structure and a support assembly. The first guide structure is disposed on and connected to the base, and the guiding direction of the first guide structure is a first direction. The support assembly is connected to the first guide structure and is movable on the first guide structure along the first direction. The support assembly includes a support body and a buffer member. The support body has a receiving cavity, and the buffer member is disposed on the inner wall of the receiving cavity. The buffer member is used to cover the charging gun, and the buffer member can elastically deform when the charging gun is deflected to adaptively compensate for the positional deviation of the charging gun. A second support structure is provided, which is arranged along the first direction with the first support structure. The second support structure is connected to the base and is used to install a socket. An actuator is disposed on the side of the first support structure opposite to the second support structure. The actuator is used to apply a pushing or pulling force to the charging gun so that the charging gun is inserted into or pulled out of the socket.

2. The testing apparatus according to claim 1, characterized in that, The surface of the buffer that contacts the charging gun is provided with a friction-reducing layer.

3. The testing apparatus according to claim 2, characterized in that, It also includes a controller, a first drive unit, and a second drive unit, both of which are electrically connected to the controller; The first driving component is used to drive the support assembly to move; The second driving element is used to drive the actuator to move; the controller is used to control the movement of the support component driven by the first driving element to be synchronized with the movement of the actuator driven by the second driving element.

4. The testing apparatus according to claim 1, characterized in that, The first support structure further includes a connector, which includes a connector body and a second guide structure connected to the connector body. The connector body is connected to the first guide structure and is movable on the first guide structure along the first direction. The guiding direction of the second guide structure is the second direction, the support body is connected to the second guide structure and is movable on the second guide structure along the second direction, wherein the second direction intersects with the first direction.

5. The testing apparatus according to claim 4, characterized in that, The support body includes a first support body and a second support body. Both the first support body and the second support body are connected to the second guide structure and are movable on the second guide structure along the second direction. The first support body and the second support body are used to jointly support the charging gun. The buffer includes a first buffer and a second buffer. The first buffer is disposed on the side of the first support body facing the second support body, and the first buffer is detachably connected to the first support body. The second buffer is disposed on the side of the second support body facing the first support body, and the second buffer is detachably connected to the second support body.

6. The testing apparatus according to any one of claims 1 to 5, characterized in that, The second support structure includes a support portion and a mounting assembly. One end of the support portion along a third direction is connected to the base, and the other end of the support portion along the third direction is connected to the mounting assembly. The support portion is telescopic along the third direction, and the mounting assembly is used to mount a socket. The first direction, the second direction, and the third direction intersect each other.

7. The testing apparatus according to claim 6, characterized in that, The mounting assembly includes a support base, a bracket, and a mounting frame; the support base is connected to the support portion, and the bracket is connected to the support base; the mounting frame is used to mount the socket. The testing device also includes a force sensor, one end of which is connected to the bracket along the first direction, and the other end of which is connected to the mounting frame along the first direction.

8. The testing apparatus according to claim 7, characterized in that, The mounting assembly also includes a support rod, one end of which is connected to the mounting frame, and the other end of which is provided with a roller that can roll on the side of the support seat facing the mounting frame.

9. The testing apparatus according to claim 7, characterized in that, The mounting frame includes a frame body and a mounting plate. The frame body is connected to the force sensor, and the mounting plate is detachably connected to the frame body. The mounting plate is used to connect to a socket.

10. The testing apparatus according to claim 7, characterized in that, It also includes a displacement sensor, a force sensor, and a controller. The displacement sensor and the force sensor are both electrically connected to the controller. The displacement sensor is used to test the displacement of the charging gun relative to the socket, and the force sensor is used to test the insertion and extraction force of the charging gun. The controller is used to acquire the displacement and the insertion and extraction force and output the relationship curve between the displacement and the insertion and extraction force.

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