A charging pile detection device

Abstract

This invention relates to the field of charging pile testing technology, specifically a charging pile testing device to solve the problems of inconsistent insertion depth, contact position misalignment, and contact pressure fluctuations caused by the reliance on manual alignment in existing testing devices. The device includes a housing, a testing module, a test connector, a sliding base, a translation mechanism, a ball seat, a front positioning sleeve, a pre-tightening mechanism, and a triggering mechanism. The test connector is mounted on the ball seat and electrically connected to the testing module. The front positioning sleeve is fitted over the test connector and allows insertion into the outer periphery of the output port under test. A limiting step on the test connector forms the inner cavity bottom of the front positioning sleeve. The translation mechanism compensates for lateral deviation, the ball seat compensates for attitude deviation, the pre-tightening mechanism provides axial pre-tightening force, and the triggering mechanism outputs a detection enable signal when a predetermined trigger distance is reached. This invention improves the stability of the contact state between the test connector and the output port under test, thereby improving testing accuracy and repeatability.

Description

Technical Field

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

[0002] Electrical performance testing devices typically connect to the output port of the device under test (DUT) via a test plug or probe, forming a measurement loop to acquire detection signals such as voltage, current, continuity, and contact status at the DUT. For power supply equipment with output ports, such as charging piles, this external testing method is often used during factory inspection, installation acceptance, and maintenance patrols. For example, in applications such as electric bicycle charging piles, the testing device usually needs to be reliably plugged into or contacted with the charging pile's output port to acquire detection signals such as voltage, current, continuity, and contact status.

[0003] In existing testing devices, the operator inserts or abuts the test connector into or against the output port under test, and the testing host determines the electrical performance status of the port based on the acquired electrical signals. However, existing test connectors typically rely on manual alignment and lack positioning, guiding, and limiting structures that are compatible with the output port under test. When there are differences in the shape, installation posture, or wear degree of the output port under test, the test connector is prone to inconsistent insertion depth, contact position misalignment, or contact pressure fluctuations, resulting in changes in the contact impedance of the measurement circuit. This, in turn, affects the accuracy and repeatability of the voltage, current, continuity, and contact status test results.

[0004] Therefore, a charging pile testing device is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a charging pile testing device that addresses the problems of existing charging pile testing devices, which rely primarily on manual alignment during testing. These devices lack positioning, guiding, limiting, and adaptive compensation structures between the test connector and the output port under test, easily leading to inconsistent insertion depths, contact position offsets, and contact pressure fluctuations. This, in turn, affects the accuracy and repeatability of voltage, current, on / off status, and contact status testing results. This invention improves the stability of the contact state between the test connector and the output port under test by providing a front-end positioning sleeve and limiting step at the front end of the test connector, and a translation mechanism and a swingable ball seat at the rear end of the test connector, along with a pre-tightening mechanism and a triggering mechanism. This allows the test connector to sequentially complete peripheral guidance, insertion limiting, lateral deviation compensation, posture deviation compensation, elastic pre-tightening contact, and post-positioning detection enable during testing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A charging pile testing device includes a housing, a testing module disposed within the housing, and a test connector with test probes. The test connector is electrically connected to the testing module. The device is characterized by: a sliding base fixedly installed within the housing; a translation mechanism slidably connected to the sliding base and capable of lateral translation; a ball seat oscillatingly connected to the translation mechanism; the test connector fixed to the ball seat and provided with a limiting step; a front-end positioning sleeve is provided over the test connector, the inner cavity of which allows insertion of the outer periphery of the output port under test; the front face of the limiting step serves as a limiting end face; a pre-tightening mechanism is abutting between the housing and the translation mechanism; and a triggering mechanism includes a connecting rod sliding along the axial direction of the test connector and a trigger switch fixed to the housing. When the housing moves forward relative to the translation mechanism and compresses the pre-tightening mechanism, and the displacement reaches a predetermined trigger distance, the connecting rod causes the trigger switch to output an enable signal to the testing module.

[0007] This invention uses a test connector as the detection component that forms an electrical connection with the output port under test, and a front positioning sleeve as a positioning and guiding component that mates with the outer periphery of the output port under test. During testing, the outer periphery of the output port under test first enters the inner cavity of the front positioning sleeve, which constrains the entry direction of the test connector. When the end face of the output port under test abuts against the limiting step, the insertion depth of the output port under test relative to the test connector is limited. Simultaneously, a translation mechanism compensates for lateral deviations between the test connector and the output port under test, a ball seat compensates for attitude deviations of the output port under test, a pre-tightening mechanism provides axial pre-tightening force, and a triggering mechanism outputs a detection enable signal after the predetermined stroke is completed, allowing the detection module to perform detection only after the contact state is relatively stable.

[0008] Preferably, the translation mechanism includes an axial sliding seat, an intermediate plate, a sliding base plate, a first slide rail, and a second slide rail. The axial sliding seat is axially slidingly engaged with the sliding base. The first slide rail includes a first guide rail and a first slider that slides with the first guide rail. The first guide rail is fixed to the axial sliding seat, and the first slider is fixed to the intermediate plate. The second slide rail includes a second guide rail and a second slider that slides with the second guide rail. The second guide rail is fixed to the intermediate plate, and the second slider is fixed to the sliding base plate. The extension directions of the first and second guide rails are perpendicular to each other. The intermediate plate has a clearance hole, and the sliding base plate has a rear boss that extends rearward and passes through the clearance hole. A clearance gap is left between the rear boss and the wall of the clearance hole. The first and second guide rails are perpendicular to each other, enabling the sliding base plate to generate translation compensation in two lateral directions, thereby absorbing the lateral eccentricity between the test connector and the output port under test. The clearance gap between the rear boss and the clearance hole prevents interference between the sliding base plate and the intermediate plate when moving laterally, making the lateral compensation action smoother.

[0009] Preferably, the outer spherical surface of the ball seat is provided with an anti-rotation guide groove extending along the outer spherical surface of the ball seat. The sliding base plate is provided with a socket that mates with the outer spherical surface and an assembly hole that mates with the anti-rotation guide groove. The anti-rotation pin is slidably disposed in the assembly hole. A spring is abutted between the bottom of the assembly hole and the anti-rotation pin and applies an elastic force to the anti-rotation pin to extend its pin end into the anti-rotation guide groove. The pin end of the anti-rotation pin extends into the anti-rotation guide groove. The pin end mates with the two side walls of the anti-rotation guide groove to restrict the ball seat from rotating around the axis of the test connector. The pin end can move along the anti-rotation guide groove to allow the ball seat to swing with the outer spherical surface in the socket. The sliding base plate is connected to a socket front cover plate that axially restricts the ball seat in the socket. The ball seat engages with the ball socket via an outer spherical surface, allowing the test connector to swing at an angle with the ball seat to accommodate installation orientation deviations of the output port under test. The anti-rotation pin engages with the anti-rotation guide groove to allow the ball seat to swing while restricting its rotation around the axis of the test connector, thereby maintaining the circumferential orientation stability of the test probe.

[0010] Preferably, the front opening of the front positioning sleeve is provided with a guide ramp, and the front face of the limiting step constitutes a limiting end face for abutting against the end face of the output port under test. The guide ramp can guide the outer periphery of the output port under test into the inner cavity of the front positioning sleeve when the device approaches the output port under test, reducing the difficulty of manual alignment; the front face of the limiting step, as a limiting end face, can limit the insertion depth of the output port under test relative to the test connector, so that the contact position of the test probe remains consistent.

[0011] Preferably, the pre-tightening mechanism includes a pre-tightening spring and a thrust cup. A positioning ring, fixed relative to the housing, is provided within the housing. The positioning ring supports the rear end of the pre-tightening spring, and the front end of the pre-tightening spring presses against the rear boss of the sliding base plate via the thrust cup. The thrust cup has a friction-reducing contact surface that slides in contact with the rear boss. When the housing moves axially forward relative to the translation mechanism, the pre-tightening spring is compressed and an axial elastic force is applied to the sliding base plate via the thrust cup, maintaining pre-tightening contact between the test connector and the output port under test. The friction-reducing contact surface of the thrust cup allows the rear boss to slide relative to it during lateral compensation, reducing interference from two-dimensional translation on the axial pre-tightening force.

[0012] Preferably, the triggering mechanism further includes a linkage return spring. The front end of the linkage protrudes from the front end of the test connector, and the rear end faces the triggering part of the trigger switch. A limiting retaining ring is provided in the middle of the linkage. The linkage return spring abuts against the limiting retaining ring and the inner step of the ball seat and applies a forward reset force to the linkage. During the detection process, the front end of the linkage is pushed by the inner end face of the output port under test. When the predetermined stroke is reached, it acts on the trigger switch, causing the trigger switch to output a detection enable signal. The linkage return spring is used to push the linkage to reset after the device exits the output port under test.

[0013] Preferably, the ball seat is provided with a connecting rod guide sleeve and wire passages distributed around the connecting rod guide sleeve. The connecting rod slides on the connecting rod guide sleeve, and the multi-core wire passes through the wire passages and connects the test probe and the detection module. The connecting rod guide sleeve guides the axial sliding of the connecting rod, and the wire passages provide an independent wiring path for the multi-core wire, thereby reducing the mutual interference between the reciprocating motion of the connecting rod and the multi-core wire, and improving the reliability of the triggering action and electrical connection.

[0014] Preferably, the rear end of the connecting rod is provided with a convex spherical crown surface, and the trigger part of the trigger switch is provided with a contact piece that contacts the convex spherical crown surface. The convex spherical crown surface and the contact piece cooperate to maintain a relatively stable contact force transmission relationship when the ball seat swings at a certain angle, reducing the bias or jamming caused to the trigger switch when the connecting rod is tilted.

[0015] Preferably, the ball seat has a insertion hole at its front end, and the test connector has a plug tail at its rear end for insertion into the insertion hole, the plug tail being fixed to the ball seat; the plug tail has a positioning and error-prevention key, and the insertion hole has an error-prevention keyway that mates with the positioning and error-prevention key. The plug tail mates with the insertion hole, allowing the test connector to be stably installed on the ball seat; the positioning and error-prevention key mates with the error-prevention keyway to limit the circumferential installation direction of the test connector, reducing the risk of incorrect or off-center installation of the test connector.

[0016] Preferably, the detection module is configured to detect at least one of voltage, current, on / off state, or contact state at the output port under test after receiving a detection enable signal. The detection module is electrically connected to the test connector and performs the detection after the trigger mechanism outputs a detection enable signal, so that the detection action corresponds to the mechanical positioning state of the test connector, thereby reducing misjudgments caused by collecting detection signals under non-positional contact or unstable contact states.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a front-end positioning jacket and a limiting step to allow the outer periphery of the output port under test to first enter the inner cavity of the front-end positioning jacket for guidance and positioning. When inserted to a predetermined depth, the limiting step provides axial limitation, thereby reducing problems such as contact position offset and inconsistent insertion depth caused by manual alignment errors and differences in manual pushing force, making the contact position between the test stylus and the output port under test more stable.

[0018] 2. This invention, through the cooperation of a translation mechanism and a ball seat, enables the test connector to perform translation compensation in two lateral directions and angular swing compensation with the ball seat, thereby adapting to lateral eccentricity, installation posture deviation, or peripheral wear differences in the output port under test; at the same time, the anti-rotation pin and the anti-rotation guide groove cooperate to restrict the ball seat from rotating around the axis of the test connector while allowing it to swing, which helps to maintain the circumferential orientation stability of the test probe.

[0019] 3. The present invention forms an axial elastic pre-tightening between the housing and the translation mechanism through a pre-tightening mechanism, so that the test probe and the output port under test maintain a relatively stable contact pressure. The triggering mechanism outputs a detection enable signal when the housing moves forward axially relative to the translation mechanism to a predetermined stroke, so that the detection module performs detection after the test connector is positioned, limited and pre-tightened in place, thereby reducing the detection error caused by contact impedance fluctuation and incomplete contact, and improving the accuracy and repeatability of voltage, current, on / off state or contact state detection results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall main structure of the present invention; Figure 2 For the present invention Figure 1 Sectional view of AA; Figure 3 This is a schematic diagram of the translation mechanism and ball seat structure of the present invention; Figure 4 For the present invention Figure 2 Enlarged diagram of section B; Figure 5 This is a schematic diagram of the sliding base plate and thrust cup structure of the present invention; Figure 6 This is a schematic diagram of the test connector structure of the present invention; Figure 7 This is a schematic diagram of the ball seat structure of the present invention.

[0021] In the diagram: 1. Housing; 11. Positioning ring; 12. Sliding base; 2. Translation mechanism; 21. Axial sliding seat; 22. Intermediate plate; 23. Sliding base plate; 3. Ball seat; 31. Anti-rotation pin; 32. Anti-rotation guide groove; 4. Test connector; 41. Limiting step; 5. Front positioning sleeve; 6. Pre-tightening mechanism; 61. Pre-tightening spring; 62. Thrust cup; 7. Triggering mechanism; 71. Connecting rod; 72. Connecting rod return spring; 73. Trigger switch; 74. Contact piece; 8. Detection module; 9. Test output port. Detailed Implementation

[0022] Please see Figures 1 to 7 The present invention provides a charging pile testing device, the technical solution of which is as follows: A charging pile testing device includes a housing 1, a testing module 8 disposed within the housing 1, and a test connector 4 with test probes. The test connector 4 is electrically connected to the testing module 8. The device is characterized in that: a sliding base 12 is fixedly installed inside the housing 1; a translation mechanism 2 is slidably connected to the sliding base 12 and can move laterally; a ball seat 3 is oscillatingly connected to the translation mechanism 2; the test connector 4 is fixed to the ball seat 3 and has a limiting step 41; a front positioning sleeve 5 is provided outside the test connector 4, the inner cavity of which allows the outer periphery of the output port 9 to be tested to be inserted; the front face of the limiting step 41 is a limiting end face; a pre-tightening mechanism 6 is abutted between the housing 1 and the translation mechanism 2; a triggering mechanism 7 includes a connecting rod 71 that slides along the axial direction of the test connector 4 and a trigger switch 73 fixed to the housing 1; when the housing 1 moves forward relative to the translation mechanism 2 and compresses the pre-tightening mechanism 6, and the displacement reaches a predetermined trigger distance, the connecting rod 71 causes the trigger switch 73 to output an enable signal to the testing module 8.

[0023] Specifically, this invention uses a test connector 4 as a detection component that forms an electrical connection with the output port 9 under test, and a front positioning sleeve 5 as a positioning and guiding component that mates with the outer periphery of the output port 9 under test. The inner cavity cross-section is adapted to the outer periphery contour of the output port 9 under test, and the inlet guide slope is used to generate a radial guiding force. During testing, the operator pushes the housing 1 to bring the test connector 4 close to the output port 9 under test. The outer periphery of the output port 9 under test first enters the inner cavity of the front positioning sleeve 5, and the front positioning sleeve 5 initially constrains the entry direction of the test connector 4, thereby reducing the alignment deviation caused by the test probe directly contacting the output port 9 under test in a non-guided state. When there is a lateral deviation or posture deviation between the output port 9 under test and the test connector 4, the translation mechanism 2 can drive the test connector 4 to perform lateral translation compensation, and the ball seat 3 can drive the test connector 4 to perform angular swing compensation, so that the test connector 4 contacts the output port 9 under test in a more suitable position and posture.

[0024] The limiting step 41 forms the bottom of the cavity of the front positioning jacket 5. When the end face of the output port 9 under test abuts against the limiting step 41, the insertion depth of the output port 9 under test relative to the test connector 4 is limited, thereby reducing the inconsistency in insertion depth caused by different manual pushing forces, and making the contact position between the test stylus and the output port 9 under test more stable. At the same time, the pre-tightening mechanism 6 generates elastic compression and provides axial pre-tightening force to the test connector 4, so that the test stylus and the output port 9 under test maintain a relatively stable contact pressure. The triggering mechanism 7 outputs a detection enable signal when the housing 1 moves forward axially relative to the translation mechanism 2 to a predetermined trigger distance. The predetermined trigger distance is determined according to the trigger switch action stroke, the initial clearance of the connecting rod and the target compression amount of the pre-tightening spring. The detection module 8 performs detection after receiving the detection enable signal, thereby reducing the risk of misjudgment caused by detection in an incomplete or unstable contact state.

[0025] As one embodiment of the present invention, refer to Figure 2 and Figure 3 The translation mechanism 2 includes an axial sliding seat 21, an intermediate plate 22, a sliding base plate 23, a first slide rail, and a second slide rail. The axial sliding seat 21 is axially slidably engaged with the sliding base 12. The first slide rail includes a first guide rail and a first slider that slidably engages with the first guide rail. The first guide rail is fixed to the axial sliding seat 21, and the first slider is fixed to the intermediate plate 22. The second slide rail includes a second guide rail and a second slider that slidably engages with the second guide rail. The second guide rail is fixed to the intermediate plate 22, and the second slider is fixed to the sliding base plate 23. The extension directions of the first guide rail and the second guide rail are perpendicular to each other. The intermediate plate 22 is provided with a clearance through hole, and the sliding base plate 23 is provided with a rear boss that extends rearward and passes through the clearance through hole. A clearance gap is left between the rear boss and the wall of the clearance through hole.

[0026] Specifically, the sliding fit between the axial sliding seat 21 and the sliding base 12 enables the translation mechanism 2 to slide relative to the housing 1 along the axial direction of the test connector 4, providing a motion basis for the subsequent elastic pre-tightening and stroke judgment of the trigger mechanism 7. Since the sliding directions of the first slide rail and the second slide rail are perpendicular to each other, the sliding base plate 23 can form a combined translational displacement in two lateral directions. Therefore, when the front end positioning sleeve 5 is subjected to the lateral guiding force of the outer periphery of the output port 9 under test, the sliding base plate 23 can move in the direction of reducing lateral deviation under the action of the guiding force, so that the test connector 4 tends to match the actual position of the output port 9 under test.

[0027] A clearance is provided between the rear boss and the wall of the clearance through hole. The purpose of this clearance is to prevent the rear boss from rigidly colliding with or getting stuck against the wall of the intermediate plate 22 when the sliding base plate 23 moves laterally in the direction defined by the first and second slide rails for compensation. In this way, the sliding base plate 23 can receive the axial preload transmitted by the preload mechanism 6 through the rear boss, and can also maintain its freedom of movement during lateral compensation, thus taking into account both axial preload and lateral correction functions.

[0028] As one embodiment of the present invention, refer to Figure 4 and Figure 7The ball seat 3 has an anti-rotation groove 32 extending along its outer spherical surface. The sliding base plate 23 has a socket that mates with the outer spherical surface and an assembly hole that mates with the anti-rotation groove 32. The anti-rotation pin 31 is slidably disposed in the assembly hole. A spring is abutted between the bottom of the assembly hole and the anti-rotation pin 31 and applies an elastic force to the anti-rotation pin 31 to extend its pin end into the anti-rotation groove 32. The pin end of the anti-rotation pin 31 extends into the anti-rotation groove 32. The pin end mates with the two side walls of the anti-rotation groove 32 to restrict the ball seat 3 from rotating around the axis of the test connector 4. The pin end can move along the anti-rotation groove 32 to allow the ball seat 3 to swing with the outer spherical surface in the socket. The sliding base plate 23 is connected to a socket front cover plate that axially restricts the ball seat 3 within the socket.

[0029] Specifically, the outer spherical surface of the ball seat 3 engages with the ball socket on the sliding base plate 23, allowing the ball seat 3 to swing relative to the sliding base plate 23. Since the test connector 4 is installed on the ball seat 3, when the installation posture of the output port 9 under test is tilted, the front positioning sleeve 5 can drive the test connector 4 and the ball seat 3 to adjust their posture in the ball socket under the guiding action of the outer periphery of the output port 9 under test, thereby reducing the bias contact between the test probe and the output port 9 under test.

[0030] The pin end of the anti-rotation pin 31 engages with the two side walls of the anti-rotation guide groove 32, preventing the ball seat 3 from rotating around the axis of the test connector 4 and avoiding circumferential misalignment of the test connector 4 due to wire harness twisting or friction on the outer periphery of the port. Simultaneously, the pin end of the anti-rotation pin 31 can move along the anti-rotation guide groove 32, thus not hindering the ball seat 3 from swinging with the outer spherical surface within the ball socket. This structure allows the ball seat 3 to have the swing freedom to adapt to port orientation deviations while maintaining the stability of the test stylus orientation. Furthermore, the limiting effect of the ball socket front cover plate axially confines the outer spherical surface of the ball seat 3 within the ball socket, forming a complete ball joint.

[0031] As one embodiment of the present invention, refer to Figure 2 The front opening of the front positioning jacket 5 is provided with a guide slope, and the front face of the limiting step 41 forms a limiting end face for abutting against the end face of the output port 9 being tested.

[0032] Specifically, when there is a certain lateral deviation between the test connector 4 and the output port 9 under test, the outer periphery of the output port 9 under test can first contact the guide ramp and gradually enter the inner cavity of the front positioning sleeve 5 under the guidance of the guide ramp. This structure is equivalent to establishing a mechanical guiding process before the test probe contacts the conductive part, thereby reducing the operator's alignment accuracy requirements. When the output port 9 under test is inserted into the inner cavity of the front positioning sleeve 5 and reaches the predetermined depth, the end face of the output port 9 under test abuts against the front face of the limiting step 41, and the further penetration of the test connector 4 relative to the output port 9 under test is restricted. This limiting structure makes the contact depth of the test probe no longer completely dependent on the manual pushing force, which is beneficial to maintaining the consistency of the contact position during testing.

[0033] As one embodiment of the present invention, refer to Figure 3 and Figure 5 The pre-tightening mechanism 6 includes a pre-tightening spring 61 and a thrust cup 62. The housing 1 is provided with a positioning ring 11 fixed relative to the housing 1. The positioning ring 11 supports the rear end of the pre-tightening spring 61. The front end of the pre-tightening spring 61 presses against the rear boss of the sliding base plate 23 via the thrust cup 62. The thrust cup 62 has a friction-reducing contact surface that slides in contact with the rear boss.

[0034] Specifically, the positioning ring 11 is disposed inside the housing 1 and serves as a support base for the rear end of the preload spring 61. When the housing 1 moves forward axially relative to the translation mechanism 2, the positioning ring 11 moves forward with the housing 1, causing the preload spring 61 to be compressed. The compressed preload spring 61 applies an axial elastic force to the rear boss through the thrust cup 62. This axial elastic force is further transmitted to the sliding base plate 23, the ball seat 3, and the test connector 4, thereby ensuring that the test probe and the output port 9 under test are in preload contact.

[0035] Since the sliding base plate 23 may translate in two lateral directions during the alignment process, if the preload spring 61 directly presses against the rear boss, the lateral displacement can easily cause the preload spring 61 to be subjected to skewed force. With the push cup 62 installed, the rear boss can adaptively slide relative to the friction-reducing contact surface of the push cup 62, causing the preload spring 61 to compress primarily along the axial direction. The friction-reducing contact surface of the push cup 62 is made of self-lubricating polytetrafluoroethylene material, which can effectively reduce the coefficient of friction when the friction-reducing contact surface slides relative to the sliding contact part of the rear boss, ensuring that the sliding base plate 23 only needs to withstand low lateral frictional resistance to achieve translational compensation, effectively avoiding frictional self-locking. Therefore, this invention can maintain two-dimensional translational adaptive capability while enabling the test stylus to obtain relatively stable axial contact pressure.

[0036] As one embodiment of the present invention, refer to Figure 2The triggering mechanism 7 also includes a linkage return spring 72. The front end of the linkage 71 protrudes from the front end of the test connector 4, and the rear end is opposite to the triggering part of the trigger switch 73. A limiting ring is provided in the middle of the linkage 71. The linkage return spring 72 abuts against the limiting ring and the inner step of the ball seat 3 and applies a forward restoring force to the linkage 71.

[0037] Specifically, the connecting rod 71 is arranged axially along the test connector 4, with its front end protruding beyond the front end of the test connector 4. This allows it to sense the contact state of the inner end face of the output port 9 under test before the test probe stabilizes. When the device moves towards the output port 9 under test and reaches the predetermined contact state, the front end of the connecting rod 71 is pushed by the inner end face of the output port 9 under test, and its rear end gradually approaches and acts on the trigger part of the trigger switch 73. When the housing 1 moves forward axially relative to the translation mechanism 2 to the predetermined stroke, the connecting rod 71 pushes the trigger switch 73 to actuate, causing the trigger switch 73 to output a detection enable signal. This structure allows the detection module 8 to start detection only after the test connector 4 has reached a relatively stable contact state, reducing detection errors caused by incomplete insertion, insufficient contact pressure, or incomplete port orientation adaptation.

[0038] As one embodiment of the present invention, refer to Figure 2 The ball seat 3 is provided with a connecting rod guide sleeve and a wire passage distributed around the connecting rod guide sleeve. The connecting rod 71 is slidably fitted to the connecting rod guide sleeve. The multi-core wire passes through the wire passage and connects the test probe and the detection module 8.

[0039] Specifically, the connecting rod guide sleeve is disposed within the ball seat 3 to guide the axial sliding of the connecting rod 71 and prevent it from jamming. A wire passage around the connecting rod guide sleeve allows multi-core wires to pass through, connecting the test probe to the detection module 8, thus achieving electrical connection between the test connector 4 and the detection module 8. By separating the sliding path of the connecting rod 71 from the wiring path of the multi-core wire, the squeezing and friction on the multi-core wire during the reciprocating movement of the connecting rod 71 can be reduced, and the multi-core wire can be prevented from tangling or pulling on the connecting rod 71, thus affecting the triggering action. In this way, the mechanical action of the triggering mechanism 7 and the electrical connection of the detection module 8 can be arranged in an orderly manner within the ball seat 3, improving the reliability of the internal structure of the device.

[0040] As one embodiment of the present invention, refer to Figure 2 and Figure 3 The rear end of the connecting rod 71 is provided with an outwardly convex spherical crown surface, and the trigger part of the trigger switch 73 is provided with a contact piece 74 that contacts the outwardly convex spherical crown surface.

[0041] Specifically, when the ball seat 3 swings to adapt to the posture of the output port 9 being tested, the axis of the connecting rod 71 may have a slight angular change relative to the triggering part of the trigger switch 73. If the rear end of the connecting rod 71 adopts a common planar structure, it is easy to generate bias pressure on the trigger switch 73 under deflected angle conditions, affecting the stability of the triggering action. After the rear end of the connecting rod 71 is provided with a convex spherical crown surface, the convex spherical crown surface can form a smoother contact relationship with the contact piece 74. Even if the connecting rod 71 changes a certain angle with the ball seat 3, it can reliably transmit the axial displacement to the trigger switch 73. The contact piece 74 is set on the triggering part of the trigger switch 73 to receive the triggering force transmitted from the rear end of the connecting rod 71. The cooperation between the convex spherical crown surface and the contact piece 74 can reduce the risk of local interference and uneven wear between the rear end of the connecting rod 71 and the trigger switch 73, so that the triggering mechanism 7 can maintain a more stable triggering response during multiple tests.

[0042] As one embodiment of the present invention, refer to Figure 6 The ball seat 3 has a plug hole at its front end and the test connector 4 has a plug tail at its rear end for inserting into the plug hole. The plug tail is fixed to the ball seat 3. The plug tail has a positioning and error-proof flat key and the plug hole has an error-proof key groove that cooperates with the positioning and error-proof flat key.

[0043] Specifically, the test connector 4 is inserted into the insertion hole at the front end of the ball seat 3 via its rear end and fixed to the ball seat 3, allowing the test connector 4 to swing synchronously with the ball seat 3. During assembly of the test connector 4, the positioning anti-misalignment key must align with the anti-misalignment keyway for the test connector 4 to be inserted correctly. This anti-misalignment structure limits the circumferential installation angle of the test connector 4 relative to the ball seat 3, maintaining a predetermined orientation between the test probe, the front positioning sleeve 5, the connecting rod 71, and the triggering mechanism 7, thus reducing the risk of incorrect, off-center, or reverse assembly of the test connector 4.

[0044] In one embodiment of the present invention, the detection module 8 is configured to detect at least one of voltage, current, on / off state or contact state of the output port 9 under test after receiving a detection enable signal.

[0045] Specifically, the detection module 8 is electrically connected to the test connector 4. The test probes on the test connector 4 are used to contact the corresponding conductive parts of the output port 9 under test to form the measurement circuit required for detection. Since the detection module 8 performs detection on the output port 9 only after the front positioning sleeve 5 completes guidance, the limiting step 41 completes insertion depth limitation, the translation mechanism 2 completes lateral compensation, the ball seat 3 completes attitude compensation, and the pre-tightening mechanism 6 establishes pre-tightening contact, this detection scheme helps reduce the deviation in detection results caused by contact position offset, inconsistent insertion depth, or contact pressure fluctuations, thereby improving the accuracy and repeatability of the electrical performance detection of the charging pile output port.

[0046] Working principle: In the free standby state, the test connector 4 of the device is stably held at its front limit position under the initial pre-tightening force of the pre-tightening mechanism 6. At this time, the front end of the connecting rod 71 of the triggering mechanism 7 protrudes from the test connector 4, and its rear end has not yet triggered the switch 73. No detection enable signal is generated, the detection module 8 does not receive the detection enable signal, and the detection action is not initiated. This helps reduce the risk of false detection when the connector is not properly connected.

[0047] When the operator holds the housing 1, aligns the front positioning sleeve 5 with the output port of the charging pile under test, and moves it forward, the guide slope at the front opening of the front positioning sleeve 5 first acts as a "capture," guiding the outer periphery of the port into the inner cavity of the sleeve even if the operator's alignment is off. Then, if the port under test itself has an installation position deviation or an end face angle tilt, this deviation will force the test connector 4, ball seat 3, and sliding base plate 23 to produce an adaptive response. Specifically, the radial deviation force will drive the entire translation mechanism 2 to perform a smooth displacement in the XY plane, allowing the test connector 4 to automatically find the center of the port; while the torque generated by the tilt angle deviation will drive the ball seat 3 to swing at an angle within the ball socket of the sliding base plate 23, reducing the attitude deviation between the test connector 4 and the output port 9 under test. This combination of radial translation and angle swing is passive and mechanical, requiring no sensors or control, and can absorb at least part of the spatial attitude deviation before the test probe makes stable contact.

[0048] After the angle and position are automatically corrected, as the housing 1 continues to push forward, the front positioning sleeve 5 continues to slide in along the outer periphery of the port. At this moment, the front face of the limiting step 41 abuts against the end face of the output port 9 under test. Since the rear flange of the front positioning sleeve 5 is connected to the front face of the limiting step 41, and the limiting step 41 also forms the bottom of the inner cavity of the front positioning sleeve 5, when the end face of the output port 9 under test abuts against the limiting step 41, the insertion depth of the output port 9 under test relative to the front positioning sleeve 5 and the test connector 4 is limited to a predetermined position. This can prevent the test connector 4 from being inserted too deeply or too insufficiently due to different amounts of force applied by the operator, and keep the contact position between the test probe and the output port 9 under test relatively consistent.

[0049] After the limiting step 41 abuts against the end face of the output port 9 under test, if the operator continues to push the housing 1, the output port 9 under test will prevent the test connector 4, ball seat 3, and sliding base plate 23 from continuing to move forward synchronously, while the housing 1 will move forward axially relative to the translation mechanism 2. Since the sliding base 12 is fixedly installed inside the housing 1, and the translation mechanism 2 is axially slidably installed on the sliding base 12, this relative movement causes the positioning ring 11 inside the housing 1 to move closer to the rear boss of the sliding base plate 23, and compresses the preload spring 61 located between the two. After the preload spring 61 is compressed, it applies an axial elastic force to the rear boss of the sliding base plate 23 through the thrust cup 62. This axial elastic force is then transmitted to the test probe through the sliding base plate 23, ball seat 3, and test connector 4, so that the test probe and the output port 9 under test maintain a stable contact pressure.

[0050] After the limiting step 41 abuts, the front end positions of the test connector 4 and the connecting rod 71 passing through it are fixed, while the housing 1 and the trigger switch 73 fixed thereon are still moving forward. This relative displacement forces the contact piece 74 of the trigger switch 73 to press against the rear end of the connecting rod 71. When the housing 1 completes its predetermined stroke of relative displacement, the trigger switch 73 is activated, sending a detection enable signal. Only after receiving this signal does the detection module 8 connect the detection circuit and begin measuring parameters such as voltage, current, and on / off status. Since the front positioning sleeve 5 has completed peripheral guidance, the limiting step 41 has completed insertion depth limitation, the translation mechanism 2 has completed lateral deviation compensation, the ball seat 3 has completed angle and attitude compensation, and the pre-tightening mechanism 6 has established relatively stable contact pressure before the detection begins, the electrical signal collected by the detection module 8 is formed under relatively stable mechanical contact conditions.

[0051] After the test is completed, the operator retracts the housing 1 away from the tested output port 9. This releases the trigger switch 73, causing it to disconnect prematurely. The test enable signal disappears, and the measurement circuit of the test module 8 is cut off in advance. At this time, the test connector 4 still maintains a brief safe contact with the port under the residual thrust of the pre-tightening mechanism 6. This mechanical interlocking sequence of "stopping the test first, then mechanically separating" is the core safety mechanism of this device to protect the life of the contact pin and the port. Subsequently, as the housing 1 continues to retract, the pre-tightening mechanism 6 is released, and the test connector 4 finally disengages from the port. All floating components return to their initial free standby state under the action of the reset force.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A charging pile testing device, comprising a housing (1), a testing module (8) disposed within the housing (1), and a test connector (4) with test probes, wherein the test connector (4) is electrically connected to the testing module (8), characterized in that: The housing (1) is fixedly installed with a sliding base (12). The translation mechanism (2) is slidably connected to the sliding base (12) and can be translated laterally. The ball seat (3) is oscillatingly connected to the translation mechanism (2). The test connector (4) is fixed to the ball seat (3) and is provided with a limiting step (41). The test connector (4) is covered with a front positioning sleeve (5). The inner cavity of the front positioning sleeve (5) is for the outer periphery of the output port (9) to be tested to be inserted. The front end face of the limiting step (41) is a limiting end face. A pre-tightening mechanism (6) is provided between the housing (1) and the translation mechanism (2). The triggering mechanism (7) includes a connecting rod (71) that slides along the axial direction of the test connector (4) and a trigger switch (73) fixed to the housing (1). The housing (1) moves forward relative to the translation mechanism (2) and compresses the pre-tightening mechanism (6). When the displacement reaches the predetermined trigger distance, the connecting rod (71) causes the trigger switch (73) to output an enable signal to the detection module (8).

2. The charging pile testing device according to claim 1, characterized in that, The translation mechanism (2) includes an axial sliding seat (21), an intermediate plate (22), a sliding base plate (23), a first slide rail, and a second slide rail. The axial sliding seat (21) is axially slidably engaged with the sliding base (12). The first slide rail includes a first guide rail and a first slider that is slidably engaged with the first guide rail. The first guide rail is fixed to the axial sliding seat (21), and the first slider is fixed to the intermediate plate (22). The second slide rail includes a second guide rail and a second slider that is slidably engaged with the second guide rail. The second guide rail is fixed to the intermediate plate (22), and the second slider is fixed to the sliding base plate (23). The extension directions of the first guide rail and the second guide rail are perpendicular to each other. The intermediate plate (22) is provided with a clearance through hole, and the sliding base plate (23) is provided with a rear boss that extends backward and passes through the clearance through hole. A clearance gap is left between the rear boss and the hole wall of the clearance through hole.

3. The charging pile testing device according to claim 2, characterized in that, The ball seat (3) has an anti-rotation guide groove (32) extending along the outer spherical surface of the ball seat (3). The sliding base plate (23) has a ball socket that mates with the outer spherical surface and an assembly hole that mates with the anti-rotation guide groove (32). The anti-rotation pin (31) is slidably disposed in the assembly hole. A spring is abutted between the bottom of the assembly hole and the anti-rotation pin (31) and applies an elastic force to the anti-rotation pin (31) to make its pin end extend into the anti-rotation guide groove (32). The pin end of the anti-rotation pin (31) extends into the anti-rotation guide groove (32). The pin end mates with the two side walls of the anti-rotation guide groove (32) to restrict the ball seat (3) from rotating around the axis of the test connector (4). The pin end can move along the anti-rotation guide groove (32) to allow the ball seat (3) to swing with the outer spherical surface in the ball socket. The sliding base plate (23) is connected to a ball socket front cover plate that axially restricts the ball seat (3) in the ball socket.

4. The charging pile testing device according to claim 1, characterized in that, The front opening of the front positioning jacket (5) is provided with a guide slope, and the front face of the limiting step (41) forms a limiting end face for abutting against the end face of the output port (9) under test.

5. A charging pile testing device according to claim 2, characterized in that, The pre-tightening mechanism (6) includes a pre-tightening spring (61) and a thrust cup (62). The housing (1) is provided with a positioning ring (11) fixed relative to the housing (1). The positioning ring (11) supports the rear end of the pre-tightening spring (61). The front end of the pre-tightening spring (61) presses against the rear boss of the sliding base plate (23) through the thrust cup (62). The thrust cup (62) has a friction-reducing contact surface that slides in contact with the rear boss.

6. The charging pile testing device according to claim 1, characterized in that, The triggering mechanism (7) also includes a linkage return spring (72). The front end of the linkage (71) protrudes from the front end of the test connector (4), and the rear end is opposite to the triggering part of the trigger switch (73). A limiting ring is provided in the middle of the linkage (71). The linkage return spring (72) abuts against the limiting ring and the inner step of the ball seat (3) and applies a forward restoring force to the linkage (71).

7. A charging pile testing device according to claim 6, characterized in that, The ball seat (3) is provided with a connecting rod guide sleeve and a wire passage distributed around the connecting rod guide sleeve. The connecting rod (71) is slidably fitted onto the connecting rod guide sleeve. The multi-core wire passes through the wire passage and connects the test probe and the detection module (8).

8. A charging pile testing device according to claim 6, characterized in that, The rear end of the connecting rod (71) is provided with an outwardly convex spherical crown surface, and the trigger part of the trigger switch (73) is provided with a contact piece (74) that contacts the outwardly convex spherical crown surface.

9. A charging pile testing device according to claim 1, characterized in that, The ball seat (3) has a plug hole at the front end and the test connector (4) has a plug tail at the rear end for inserting into the plug hole. The plug tail is fixed to the ball seat (3). The plug tail is provided with a positioning and error-proof flat key and the plug hole is provided with an error-proof key groove that cooperates with the positioning and error-proof flat key.

10. A charging pile testing device according to claim 1, characterized in that, The detection module (8) is configured to detect at least one of voltage, current, on / off state or contact state of the output port (9) under test after receiving a detection enable signal.

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