A vehicle relay real vehicle lossless online detection device

Abstract

The utility model provides a kind of vehicle relay real vehicle nondestructive on-line detection device, it is related to relay detection technical field, including first connecting end and second connecting end, first connecting end side is provided with several pins, first connecting end other side is provided with first wire harness, and first wire harness includes several first wire, and first wire one end is connected with pin, second connecting end is provided with two, and second connecting end side is provided with several jack, and metal contact piece is set in jack, and second connecting end is provided with second wire harness away from jack side, and second wire harness includes several second wire, and second wire one end is connected with metal contact piece, and second wire other end is connected with first wire away from pin one end.The utility model in the first connecting end is connected with the socket of original vehicle relay by pin, and the relay to be detected is connected with one of second connecting end, and the power supply of original vehicle relay socket is used to power the relay to be detected, so as to save the burden of carrying external power supply.

Description

Technical Field

[0001] This utility model relates to the field of relay testing technology, and in particular to a vehicle relay non-destructive online testing device. Background Technology

[0002] In modern vehicles, relays, as key circuit control components, are widely used in various electrical systems, such as engine control systems, lighting systems, air conditioning systems, and airbag systems. The core functions of vehicle relays include switching control, automatic control, and circuit protection, using small currents to control large currents to ensure the normal operation of vehicle electrical equipment. However, due to the complex operating environment of vehicles, relays are susceptible to various factors such as vibration, temperature changes, electromagnetic interference, and electrical overload, which can easily lead to faults such as contact erosion, adhesion, coil short circuits, or open circuits. Once these faults occur, they will directly affect the normal operation of related vehicle systems and even endanger driving safety.

[0003] During troubleshooting, repair personnel often need to remove the relay from the vehicle's electrical system and then perform separate testing using specialized equipment. For example, Chinese Patent No. CN217879533U discloses a dedicated functional testing device for automotive air conditioning relays. This utility model includes a test box with a cover. The cover of the test box is equipped with a load-side power supply test socket, a relay function test socket, a relay mounting base, a positive power supply socket, and a negative power supply socket. The test box contains a test circuit, which includes a 12V to 5V step-down circuit, a load circuit, and a load-side test circuit.

[0004] However, when the above-mentioned device is used to test the relay, an external power supply must be carried. This not only increases the equipment carrying burden for maintenance personnel, but also requires additional wiring operations between the external power supply and the testing equipment, increasing the number of work steps, reducing testing efficiency, and posing a risk of incorrect polarity connection, which may directly lead to the burnout of the relay coil. Utility Model Content

[0005] This invention provides a vehicle relay non-destructive online testing device to solve the technical problem that currently, when testing relays, an external power supply must be carried, which increases the equipment carrying burden for maintenance personnel.

[0006] To solve the above-mentioned technical problems, this utility model discloses a vehicle relay non-destructive online testing device, comprising: a first connecting end and a second connecting end. The first connecting end has a plurality of pins on one side and a first wiring harness on the other side. The first wiring harness includes a plurality of first wires, one end of which is connected to a pin. The second connecting end has two terminals. The second connecting end has a plurality of sockets on one side, each socket corresponding to a pin. A metal contact piece is provided inside the socket. The second wiring harness has a plurality of second wires on the side of the second connecting end away from the sockets. One end of each second wire is connected to a metal contact piece, and the other end of each second wire is connected to the end of the first wire away from the pin.

[0007] Preferably, the first wire corresponds one-to-one with the pin, and the second wire corresponds one-to-one with the first wire.

[0008] Preferably, the first wire harness and the two sets of second wire harnesses form a Y-shaped structure.

[0009] Preferably, a first insulating layer is provided on the outside of the first wire harness.

[0010] Preferably, a second insulating layer is provided on the outside of the second wire harness.

[0011] Preferably, a metal connecting post is provided inside the socket, the metal connecting post is in contact with a metal contact piece, and the end of the metal contact piece away from the second wire extends to the outside of the socket and is provided with a metal connecting plate.

[0012] Preferably, a connecting sleeve is provided at the end of the second connecting end away from the second wire harness, one end of the connecting sleeve is fixedly connected to the outer wall of the second connecting end, and a plug-in interface is provided at the other end of the connecting sleeve.

[0013] Preferably, an annular mounting groove is provided on the inner wall of the insertion interface, and an elastic sealing ring is provided in the annular mounting groove.

[0014] Preferably, the first wire harness and the second wire harness are connected by a connecting assembly, which includes a first connecting ring and a second connecting ring. The first connecting ring is sleeved on the outside of the first wire harness, and a first arc-shaped clamp is provided inside the first connecting ring. A first threaded hole is provided on the side wall of the first connecting ring, and a first screw is provided in the first threaded hole. One end of the first screw is rotatably connected to the side wall of the first arc-shaped clamp, and the other end of the first screw extends to the outside of the first connecting ring and is provided with a first knob. The second connecting ring is sleeved on the outside of the second wire harness, and a second arc-shaped clamp is provided inside the second connecting ring. A second threaded hole is provided on the side wall of the second connecting ring, and a second screw is provided in the second threaded hole. One end of the second screw is rotatably connected to the side wall of the second arc-shaped clamp, and the other end of the second screw extends to the outside of the second connecting ring and is provided with a second knob. The first connecting ring and the second connecting ring are connected by several connectors.

[0015] Preferably, the first connecting ring has a first guide hole on its side wall, which is parallel to the first threaded hole. A first guide rod is slidably disposed in the first guide hole, and one end of the first guide rod is connected to the first arc-shaped clamping plate. The second connecting ring has a second guide hole on its side wall, which is parallel to the second threaded hole. A second guide rod is slidably disposed in the second guide hole, and one end of the second guide rod is connected to the second arc-shaped clamping plate.

[0016] The technical solution of this utility model has the following advantages: This utility model provides a vehicle relay non-destructive online testing device, relating to the field of relay testing technology. It includes a first connecting end and a second connecting end. The first connecting end has several pins on one side and a first wiring harness on the other side, comprising several first wires, one end of which is connected to a pin. The second connecting end has two terminals, each with several sockets on one side, each socket corresponding to a pin. A metal contact piece is disposed within each socket. A second wiring harness, comprising several second wires, is disposed on the side of the second connecting end away from the sockets. One end of each second wire is connected to a metal contact piece, and the other end is connected to the end of each first wire away from a pin. In this utility model, the first connecting end connects to the socket of the original vehicle relay via pins. The relay to be tested connects to one of the second connecting ends, utilizing the power supply of the original vehicle relay socket to power the relay to be tested. This eliminates the need to carry an external power supply and avoids the wiring steps for an external power supply, thus improving the efficiency of on-site relay testing.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the means particularly pointed out in the written description and the accompanying drawings.

[0018] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a vehicle relay non-destructive online testing device according to the present invention;

[0021] Figure 2 This is a schematic diagram of the end of the first connecting end away from the first wire harness in this utility model;

[0022] Figure 3 This is a schematic diagram of the end of the second connecting end away from the second wire harness in this utility model;

[0023] Figure 4 This is a schematic diagram of the first insulating layer and the second insulating layer in this utility model;

[0024] Figure 5 This is a schematic diagram of the connecting sleeve in this utility model;

[0025] Figure 6 This is a schematic diagram of the internal structure of the connecting sleeve in this utility model;

[0026] Figure 7 This utility model Figure 6 Partial structural cross-sectional view at point AA;

[0027] Figure 8 This is a schematic diagram of the connecting components in this utility model;

[0028] Figure 9 This is a schematic diagram of the first connecting ring structure in this utility model;

[0029] Figure 10 This is a schematic diagram of the second connecting ring structure in this utility model.

[0030] In the diagram: 1. First connector; 101, 85 pins; 102, 86 pins; 103, 87 pins; 104, 30 pin; 2. Second connector; 3. First wiring harness; 301, first wire a; 302, first wire b; 303, first wire c; 304, first wire d; 4. Socket; 5. Metal contact piece; 6. Second wiring harness; 601, second wire a; 602, second wire b; 603, second wire c; 6 04. Second conductor d; 7. First insulation layer; 8. Second insulation layer; 9. Metal connecting post; 10. Metal connecting plate; 11. Connecting sleeve; 12. Elastic sealing ring; 13. First connecting ring; 14. Second connecting ring; 15. First arc-shaped clamp; 16. First screw; 17. First knob; 18. Second arc-shaped clamp; 19. Second screw; 20. Second knob; 21. Connector; 22. First guide rod; 23. Second guide rod. Detailed Implementation

[0031] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0032] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described using the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] Example 1:

[0034] This utility model embodiment provides a vehicle relay real-vehicle non-destructive online testing device, such as... Figures 1-10 As shown, it includes: a first connecting end 1 and a second connecting end 2. The first connecting end 1 is provided with a plurality of pins on one side and a first wire harness 3 is provided on the other side of the first connecting end 1. The first wire harness 3 includes a plurality of first wires. One end of the first wire is connected to the pin. There are two second connecting ends 2. The second connecting end 2 is provided with a plurality of sockets 4 on one side. The sockets 4 correspond one-to-one with the pins. Metal contact pieces 5 are provided in the sockets 4. The second wire harness 6 is provided on the side of the second connecting end 2 away from the sockets 4. The second wire harness 6 includes a plurality of second wires. One end of the second wire is connected to the metal contact piece 5, and the other end of the second wire is connected to the end of the first wire away from the pin.

[0035] The first wire corresponds to one pin, and the second wire corresponds to one first wire.

[0036] The first wire harness 3 and the two sets of second wire harnesses 6 form a Y-shaped structure.

[0037] The working principle and beneficial effects of the above technical solution are as follows: The pins of the first connection terminal 1 correspond to the terminals of the relay under test. When testing the relay under test, firstly, the relay under test is unplugged from the socket of the original vehicle relay. Then, the pins of the first connection terminal 1 are inserted into the socket of the original vehicle relay, and the terminals of the relay under test are inserted into one of the sockets 4 of the second connection terminal 2. The terminals contact the metal contact piece 5 in the socket 4. The metal contact piece 5 is connected to one end of the second wire, and the other end of the second wire is connected to one end of the first wire. The other end of the first wire is connected to the pin of the first connection terminal 1. At this time, the vehicle power signal is transmitted to the relay under test of the second connection terminal 2 through the pins, the first wiring harness 3, the second wiring harness 6, and the metal contact piece 5. An electrical component powers the relay under test, simulating the original vehicle's operating state. Simultaneously, the same power signal is transmitted through another set of second wiring harness 6 to another second connection terminal 2. By inserting the multimeter probes into the corresponding jacks 4 of the second connection terminal 2, with the probes contacting the metal contact pieces 5, the technician can directly read the voltage, continuity, and other parameters of each terminal of the relay under test, achieving real-time power-on testing. The multimeter testing method uses existing methods, including both non-powered and powered-on testing of the relay under test, which will not be elaborated here. During non-powered testing, the first connection terminal 1 is not connected to the original vehicle relay's socket; during powered-on testing, the pins of the first connection terminal 1 are inserted into the original vehicle relay's socket. In this invention, the power supply of the original vehicle relay socket is used to power the relay under test, eliminating the need to carry an external power supply and avoiding external power wiring steps, thus improving on-site relay testing efficiency. Furthermore, the pins correspond to the original vehicle relay's socket, preventing coil burnout due to reverse polarity during connection, improving safety.

[0038] Specifically, taking a common four-pin relay as an example, the terminals of the relay under test include four terminals: 85, 86, 87, and 30. In this case, the pins of the first connection terminal 1 include pin 101 (85), pin 102 (86), pin 103 (87), and pin 104 (30). The first wiring harness 3 includes first wire a301, first wire b302, first wire c303, and first wire d304. The second wiring harness 6 includes second wire a601, second wire b602, second wire c603, and second wire d604. The socket 4 of the second connection terminal 2 includes a first hole, a second hole, a third hole, and a fourth hole. Pin 101 (85) is connected to the first wire a301. Wire a301 is connected to the second wire a601, and the second wire a601 is connected to the metal contact piece 5 in the first hole. 86 pin 102 is connected to the first wire b302, the first wire b302 is connected to the second wire b602, and the second wire b602 is connected to the metal contact piece 5 in the second hole. 87 pin 103 is connected to the first wire c303, the first wire c303 is connected to the second wire c603, and the second wire c603 is connected to the metal contact piece 5 in the third hole. 30 pin 104 is connected to the first wire d304, the first wire d304 is connected to the second wire d604, and the second wire d604 is connected to the metal contact piece 5 in the fourth hole.

[0039] Example 2:

[0040] Based on the above embodiment 1, as follows Figure 4 As shown, a first insulating layer 7 is provided on the outside of the first wire harness 3;

[0041] A second insulation layer 8 is provided on the outside of the second wire harness 6.

[0042] The working principle and beneficial effects of the above technical solution are as follows: both the first wire and the second wire are provided with an insulating protective layer. The insulating protective layer can be made of rubber to avoid short circuit faults caused by the exposure of the first wire and the second wire. The first insulating layer 7 is made by wrapping insulating tape around the outside of the first wire harness 3, and the second insulating layer 8 is made by wrapping insulating tape around the outside of the second wire harness 6. The first insulating layer 7 can wrap all the first wires in the first wire harness 3, and the second insulating layer 8 can wrap all the second wires in the second wire harness 6, thereby constraining the first wires and the second wires, making the first wire harness 3 and the two sets of second wire harnesses 6 more orderly.

[0043] Example 3:

[0044] Based on Example 1 or 2, such as Figure 6 , Figure 7 As shown, a metal connecting post 9 is provided inside the socket 4. The metal connecting post 9 contacts the metal contact piece 5. The end of the metal contact piece 5 away from the second wire extends to the outside of the socket 4 and is provided with a metal connecting plate 10.

[0045] The working principle and beneficial effects of the above technical solution are as follows: The cross-sectional area of ​​the metal connecting plate 10 is larger than that of the socket 4. Therefore, the metal connecting plate 10 can seal the socket 4. When the relay under test is not being tested, the metal connecting plate 10 can cover the opening of the socket 4, preventing external impurities from entering the socket 4 and causing problems such as oxidation, corrosion, or poor contact of the metal contact piece 5, thereby extending the service life of the second connection terminal 2. When testing the relay under test, the metal connecting post 9 can be pulled out of the socket 4, making it easy to insert the multimeter probes or the terminals of the relay under test into the socket. The hole 4 is recessed, which reduces the difficulty of insertion and removal caused by the accumulation of impurities in the hole 4, making the connection between external components and the hole 4 smoother and improving the reliability and efficiency of the testing operation. When using an automotive relay that can be directly measured online, such as the one with authorization announcement number CN213905248U, the metal connecting plate 10 can directly contact the relay measuring terminal of the automotive relay that can be directly measured online. This can effectively avoid damage to the main body and pins of the testing device caused by repeated insertion and removal of the relay that can be tested online, and extend its service life.

[0046] Example 4:

[0047] Based on any one of Examples 1-3, such as Figures 5-7 As shown, a connecting sleeve 11 is provided at the end of the second connecting end 2 away from the second wire harness 6. One end of the connecting sleeve 11 is fixedly connected to the outer wall of the second connecting end 2, and the other end of the connecting sleeve 11 is provided with a plug interface.

[0048] An annular mounting groove is provided on the inner wall of the connector, and an elastic sealing ring 12 is provided in the annular mounting groove.

[0049] The working principle and beneficial effects of the above technical solution are as follows: The connecting sleeve 11 is made of insulating material. When testing the relay to be tested, the connecting sleeve 11 can guide and position the insertion of the relay to be tested, making it easy for the terminals of the relay to be tested to be accurately inserted into the socket 4. At the same time, an elastic sealing ring 12 is set in the socket. The elastic sealing ring 12 is made of rubber material. The elastic sealing ring 12 can increase the friction with the outer wall of the relay to be tested, prevent the relay to be tested from shaking, and improve the reliability of the test. The setting of the elastic sealing ring 12 can also fill the connection gap between the relay to be tested and the connecting sleeve 11, effectively blocking the intrusion of external impurities, further protecting the metal contact piece 5 in the socket 4, avoiding poor contact caused by impurity contamination, and ensuring the stability of the test process.

[0050] Example 5:

[0051] Based on any one of Examples 1-4, such as Figures 8-10As shown, a connecting assembly is provided between the first wire harness 3 and the second wire harness 6. The connecting assembly includes a first connecting ring 13 and a second connecting ring 14. The first connecting ring 13 is sleeved on the outside of the first wire harness 3. A first arc-shaped clamping plate 15 is provided inside the first connecting ring 13. A first threaded hole is provided on the side wall of the first connecting ring 13. A first screw 16 is provided in the first threaded hole. One end of the first screw 16 is rotatably connected to the side wall of the first arc-shaped clamping plate 15. The other end of the first screw 16 extends to the outside of the first connecting ring 13 and is provided with a first knob 17. The second connecting ring 14 is sleeved on the outside of the second wire harness 6. A second arc-shaped clamping plate 18 is provided inside the second connecting ring 14. A second threaded hole is provided on the side wall of the second connecting ring 14. A second screw 19 is provided in the second threaded hole. One end of the second screw 19 is rotatably connected to the side wall of the second arc-shaped clamping plate 18. The other end of the second screw 19 extends to the outside of the second connecting ring 14 and is provided with a second knob 20. The first connecting ring 13 and the second connecting ring 14 are connected by several connectors 21.

[0052] The first connecting ring 13 has a first guide hole on its side wall, which is parallel to the first threaded hole. A first guide rod 22 is slidably disposed in the first guide hole, and one end of the first guide rod 22 is connected to the first arc-shaped clamping plate 15. The second connecting ring 14 has a second guide hole on its side wall, which is parallel to the second threaded hole. A second guide rod 23 is slidably disposed in the second guide hole, and one end of the second guide rod 23 is connected to the second arc-shaped clamping plate 18.

[0053] The working principle and beneficial effects of the above technical solution are as follows: In order to improve the reliability of the connection between the first wire harness 3 and the second wire harness 6, a connecting component is set between the first wire harness 3 and the second wire harness 6. The connecting component includes a first connecting ring 13 sleeved on the outside of the first wire harness 3 and a second connecting ring 14 sleeved on the outside of the second wire harness 6. By rotating the first knob 17, the first screw 16 can be driven to rotate. The outer wall of the first screw 16 is threadedly connected to the first threaded hole. Under the action of the first guide rod 22, the first screw 16 can drive the first arc-shaped clamping plate 15 to move closer to the first wire harness 3 until the first arc-shaped clamping plate 15 clamps the first wire harness 3 in the first connecting ring 13. Then, the second knob 20 is rotated, and the rotation of the second knob 20 drives the second screw 19 to rotate. The outer wall of the second screw 19 is threadedly connected to the second threaded hole. Under the guidance of the second guide rod 23, the second screw 19 can drive the first screw 19 to rotate. The second arc-shaped clamp 18 moves closer to the second wire harness 6 until it clamps the second wire harness 6 inside the second connecting ring 14. At this time, the first connecting ring 13 is fixed on the first wire harness 3, and the second connecting ring 14 is fixed on the second wire harness 6. The first connecting ring 13 and the second connecting ring 14 are connected by several connectors 21. Preferably, the connectors 21 can be metal rods. At least two connectors 21 are provided. One connector 21 is connected at one end to the left end of the first connecting ring 13 and at the other end to the left end of the second connecting ring 14. The other connector 21 is connected at one end to the right end of the first connecting ring 13 and at the other end to the right end of the second connecting ring 14. This keeps the first connecting ring 13 and the second connecting ring 14 at a fixed distance, which can effectively prevent the first wire harness 3 and the second wire harness 6 from shaking or loosening, and enhance the stability of the connection between the first wire harness 3 and the second wire harness 6.

[0054] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A vehicle relay real-vehicle non-destructive online testing device, characterized in that, include: The first connecting end (1) and the second connecting end (2) are provided. A number of pins are provided on one side of the first connecting end (1), and a first wire harness (3) is provided on the other side of the first connecting end (1). The first wire harness (3) includes a number of first wires. One end of the first wire is connected to the pin. There are two second connecting ends (2). A number of sockets (4) are provided on one side of the second connecting end (2). The sockets (4) correspond one-to-one with the pins. A metal contact piece (5) is provided inside the socket (4). A second wire harness (6) is provided on the side of the second connecting end (2) away from the socket (4). The second wire harness (6) includes a number of second wires. One end of the second wire is connected to the metal contact piece (5), and the other end of the second wire is connected to the end of the first wire away from the pin.

2. The vehicle relay non-destructive online testing device according to claim 1, characterized in that, The first wire corresponds to each pin, and the second wire corresponds to each first wire.

3. The vehicle relay non-destructive online testing device according to claim 1, characterized in that, The first wire harness (3) and the two sets of second wire harnesses (6) form a Y-shaped structure.

4. The vehicle relay non-destructive online testing device according to claim 1, characterized in that, The first wire harness (3) is provided with a first insulating layer (7) on its exterior.

5. The vehicle relay non-destructive online testing device according to claim 1, characterized in that, The second wire harness (6) is provided with a second insulation layer (8) on the outside.

6. The vehicle relay non-destructive online testing device according to claim 1, characterized in that, A metal connecting post (9) is provided inside the socket (4). The metal connecting post (9) contacts the metal contact piece (5). The end of the metal contact piece (5) away from the second wire extends to the outside of the socket (4) and is provided with a metal connecting plate (10).

7. The vehicle relay non-destructive online testing device according to claim 1, characterized in that, A connecting sleeve (11) is provided at the end of the second connecting end (2) away from the second wire harness (6). One end of the connecting sleeve (11) is fixedly connected to the outer wall of the second connecting end (2), and the other end of the connecting sleeve (11) is provided with a plug interface.

8. The vehicle relay non-destructive online testing device according to claim 7, characterized in that, An annular mounting groove is provided on the inner wall of the insertion interface, and an elastic sealing ring (12) is provided in the annular mounting groove.

9. The vehicle relay non-destructive online testing device according to claim 1, characterized in that, The first wire harness (3) and the second wire harness (6) are connected by a connecting assembly, which includes a first connecting ring (13) and a second connecting ring (14). The first connecting ring (13) is sleeved on the outside of the first wire harness (3). A first arc-shaped clamping plate (15) is provided inside the first connecting ring (13). A first threaded hole is provided on the side wall of the first connecting ring (13). A first screw (16) is provided in the first threaded hole. One end of the first screw (16) is rotatably connected to the side wall of the first arc-shaped clamping plate (15). The other end of the first screw (16) extends to the outside of the first connecting ring (13) and is provided with a connecting assembly. The first knob (17) and the second connecting ring (14) are sleeved on the outside of the second wire harness (6). The second arc-shaped clamp (18) is provided inside the second connecting ring (14). The second threaded hole is provided on the side wall of the second connecting ring (14). The second screw (19) is provided inside the second threaded hole. One end of the second screw (19) is rotatably connected to the side wall of the second arc-shaped clamp (18). The other end of the second screw (19) extends to the outside of the second connecting ring (14) and is provided with the second knob (20). The first connecting ring (13) and the second connecting ring (14) are connected by several connectors (21).

10. The vehicle relay non-destructive online testing device according to claim 9, characterized in that, The first connecting ring (13) has a first guide hole on its side wall, which is parallel to the first threaded hole. A first guide rod (22) is slidably disposed in the first guide hole. One end of the first guide rod (22) is connected to the first arc-shaped clamping plate (15). The second connecting ring (14) has a second guide hole on its side wall, which is parallel to the second threaded hole. A second guide rod (23) is slidably disposed in the second guide hole. One end of the second guide rod (23) is connected to the second arc-shaped clamping plate (18).

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