Vehicle-mounted fault diagnosis equipment

Abstract

The invention relates to the technical field of OBD equipment, and provides vehicle-mounted fault diagnosis equipment which comprises OBD interfaces, a connector frame, a connector mechanism, a first handle, a fastening connection mechanism and a welding butt joint mechanism, the connector mechanism is used for being in butt joint with the OBD interfaces with different pins, and the first handle is fixedly arranged on the side, away from the connector mechanism, of the connector frame; the fastening connection mechanism is detachably connected with the OBD interface, the fastening connection mechanism is used for fastening connection of the OBD interface and the joint mechanism, the welding butt joint mechanism is arranged in the joint frame, a circuit board is arranged in the welding butt joint mechanism, the welding butt joint mechanism is detachably connected with the joint mechanism, and the welding butt joint mechanism is used for welding connection with the circuit board. By means of the technical scheme, the problems that in the prior art, existing vehicle-mounted fault diagnosis equipment is difficult to deal with OBD interfaces of multiple vehicle merchants, pin damage maintenance is complex during plugging, and the efficiency is low during vehicle diagnosis are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of OBD equipment, and in particular to an on-vehicle fault diagnosis device. Background Art

[0002] OBD, or On-Board Diagnostics, is a system used to monitor vehicle emission control systems and diagnose engine performance problems. The main function of OBD is to monitor basic vehicle parameters: the OBD system can monitor basic parameters such as mileage, vehicle speed, accelerator pedal position, coolant temperature, etc., to help car owners and maintenance personnel understand the operating status of the vehicle; monitor emission-related parameters: one of the core functions of the OBD system is to monitor emission-related parameters, such as the content of various exhaust gases, oxygen content, etc., to ensure that the vehicle meets the emission standards of various countries; vehicle fault diagnosis: when the vehicle fault light is on, maintenance personnel can use the OBD diagnostic instrument to read the fault content and freeze frame data at the time of the fault, so as to quickly locate and solve the problem; control function: in some cases, the OBD system can also be used for some control functions, such as adjusting engine parameters, etc., but this part of the function is usually not used in China. The hardware interface of the OBD system is usually a 16-pin DLC located under the dashboard on the driver's side of the vehicle. This interface allows the diagnostic computer to communicate with the vehicle system, and the generated fault code can be read by connecting a dedicated computer or an external display. Maintenance personnel can obtain real-time data of the vehicle through this interface. When OBD was first used, the number and position of pins of the OBD interface used by each car dealer were different. It was not until the OBD standard was released that the number of OBD pins was fixed.

[0003] However, although the number of OBD pins is fixed at 16 so far, some manufacturers still have differences in the pin spacing, making it impossible to connect different OBD interfaces through one connector. At the same time, since the OBD interfaces on the vehicle are all set in difficult-to-operate locations such as under the steering wheel, if the pins are not aligned during connection, they are likely to be damaged. Therefore, in order to enable the diagnostic equipment to be easily connected to the OBD interfaces of various vehicles, and to easily repair the pins when they are damaged to prevent affecting the vehicle inspection work, we proposed an on-board fault diagnostic device. Summary of the invention

[0004] The present invention provides an on-board fault diagnosis device, which solves the problem that the existing on-board fault diagnosis device in the prior art is difficult to cope with the OBD interfaces of multiple car dealers, and the repair of pin damage during plugging is complicated, resulting in low efficiency in vehicle diagnosis.

[0005] The technical solution of the present invention is as follows:

[0006] A vehicle-mounted fault diagnostic device comprises an OBD interface, a connector frame, a connector mechanism, a handle, a fastening connection mechanism and a welding docking mechanism, wherein the OBD interface is arranged on a vehicle, the connector mechanism is detachably arranged on the connector frame, and the connector mechanism is used to dock with the OBD interface having different pins, the handle is fixedly arranged on a side of the connector frame away from the connector mechanism, the fastening connection mechanism is arranged on the connector frame, the fastening connection mechanism is detachably connected to the OBD interface, the fastening connection mechanism is used to fasten the OBD interface to the connector mechanism, the welding docking mechanism is arranged in the connector frame, a circuit board is arranged in the welding docking mechanism, two circuit boards are arranged, the welding docking mechanism is detachably connected to the connector mechanism, and the welding docking mechanism is used to be welded to the circuit board.

[0007] The welding docking mechanism includes a welding block, a pin hole one and a welding pin. The welding block is arranged in the joint frame. There are multiple pin holes one. The multiple pin holes one are opened on the welding block and arranged in two rows. The pin hole one is detachably connected to the joint mechanism. There are multiple welding pins. The multiple welding pins are fixedly arranged on a side of the welding block away from the pin hole one. The welding pins correspond to the pin holes one one to one. A carrying plate is fixedly arranged on a side of the welding block away from the pin hole one. The carrying plate is arranged between the two rows of welding pins. The circuit board is arranged on the carrying plate. The two circuit boards are respectively arranged on both sides of the carrying plate and are welded to the welding pins.

[0008] The connector mechanism includes a plug 1, a pin 1 and a pin 2, wherein the plug 1 is detachably connected to the connector frame, a plurality of pin 1s are provided, and a plurality of pin 1s are fixedly provided on a side of the plug 1 close to the connector frame, the pin 1 corresponds one-to-one with the pin hole 1 and is detachably connected, a plurality of pin 2s are provided, the pin 1 corresponds one-to-one with the pin 2 and is connected, and the pin 2 is provided on a side of the plug 1 away from the connector frame.

[0009] The plug one is detachably connected with an adapter, and the adapter is provided with multiple adapters. The adapter is provided with a plug two, and multiple pins three are fixedly provided in the plug two, and the pin three is provided with multiple pin holes two are opened on the side of the adapter away from the plug two, and the pins three correspond to and are connected with the pin holes two one by one, and the pin holes two are detachably connected with the pin two, the plug one is detachably connected with the OBD interface, and the plug two is detachably connected with the OBD interface.

[0010] The welding docking mechanism includes a slide rail, a slider shaft, a docking groove, a second handle and a clamping assembly. There are two slide rails, which are respectively opened on both sides of the joint frame. There are two slider shafts, which are respectively slidably set on the two slide rails. There are two docking grooves, which are respectively fixed on the two sides of the joint frame away from the slide rails. The two ends of the second handle are respectively rotatably connected to the two slider shafts. There are two clamping assemblies, which are slidably set on the docking grooves. The clamping assembly is rotatably connected to the slider shaft, and the clamping assembly is used to drive the OBD interface to dock with the second plug.

[0011] The docking groove is provided with a sliding groove and a pressure plate groove, the sliding groove is fixedly arranged on the joint frame, the clamping assembly is slidably connected to the sliding groove, the pressure plate groove is provided with two, the two pressure plate grooves are fixedly arranged on both sides of the sliding groove, the pressure plate groove is detachably connected to the clamping assembly, the clamping assembly comprises a clamping frame, a sliding shaft, a deflection shaft and a connecting rod, the clamping frame is provided with two, the clamping frame is detachably connected to the OBD interface, the two clamping frames are respectively slidably arranged on the two docking grooves, one end of the clamping frame away from the docking groove is detachably connected to the OBD interface, the sliding shaft is fixedly arranged on the clamping frame, the sliding shaft is slidably arranged in the sliding groove, the deflection shaft is provided with two, the two deflection shafts are respectively fixedly installed on both sides of the clamping frame, the deflection shaft is arranged on the side of the sliding shaft away from the docking groove, the connecting rod is provided with a plurality of connecting rods, each of the deflection shafts is rotatably connected to a connecting rod, the connecting rod is rotatably connected to the slider shaft, and the clamping frame is detachably arranged in the pressure plate groove.

[0012] The working principle and beneficial effects of the present invention are:

[0013] 1. In the present invention, a welding block and a carrier plate are provided to separate two circuit boards through the carrier plate to prevent one circuit board from affecting the other circuit board when it is burned. At the same time, the circuit board is connected with the welding pins. Compared with directly welding the circuit board with the pin 1, when the circuit board or the pin 2 fails, the broken part can be replaced and used again, thereby improving the maintenance efficiency and reducing the maintenance cost.

[0014] 2. In the present invention, by providing a plug 1 and a plug 2, when the plug 1 does not correspond to the OBD size on the vehicle, an adapter can be connected to the plug 1 and the plug 2 can be used to connect to the OBD interface, so that one diagnostic device can cope with the OBD interfaces of various vehicles by replacing the adapter;

[0015] 3. In the present invention, a welding docking mechanism is provided to make a convenient and stable connection at a position where it is inconvenient to make an OBD connection. A clamping mechanism is provided to use different connectors according to different OBD interfaces of different vehicle manufacturers, thereby coping with a variety of vehicles. By providing a welding docking mechanism, when plug one or pin two is damaged, the circuit board and the welding block can be removed and connected to other plug one for use. When the circuit board is burned, the circuit board can be quickly replaced, thereby reducing maintenance time and reusing reusable parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

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

[0018] Figure 2 It is another perspective structural schematic diagram of the whole of the present invention;

[0019] Figure 3 It is a schematic cross-sectional structure diagram of the interior of the joint frame in the present invention;

[0020] Figure 4 It is a schematic diagram of the exploded structure of the joint mechanism and the welding butt mechanism in the present invention;

[0021] Figure 5 It is a structural schematic diagram of the fastening connection mechanism in the present invention;

[0022] Figure 6 It is a structural schematic diagram of the fastening connection mechanism in the present invention from another perspective.

[0023] In the figure: 1. OBD interface; 2. Connector frame; 3. Handle 1; 4. Circuit board; 5. Welding block; 6. Pin hole 1; 7. Welding pin; 8. Loading plate; 9. Plug 1; 10. Pin 1; 11. Pin 2; 12. Adapter; 13. Plug 2; 14. Pin 3; 15. Pin hole 2; 16. Slide rail; 17. Slider shaft; 18. Docking slot; 19. Handle 2; 20. Sliding slot; 21. Pressure plate slot; 22. Clamping frame; 23. Sliding shaft; 24. Deflection shaft; 25. Connecting rod. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figures 1 to 6 As shown, this embodiment proposes an on-vehicle fault diagnosis device, including an OBD interface 1, a connector frame 2, a connector mechanism, a handle 3, a fastening connection mechanism and a welding docking mechanism, the OBD interface 1 is arranged on the vehicle, the connector mechanism is detachably arranged on the connector frame 2, the connector mechanism is used to dock with the OBD interface 1 with different pins, the handle 3 is fixedly arranged on the connector frame 2 on a side away from the connector mechanism, the fastening connection mechanism is arranged on the connector frame 2, the fastening connection mechanism is detachably connected to the OBD interface 1, the fastening connection mechanism is used to fasten the OBD interface 1 to the connector mechanism, the welding docking mechanism is arranged in the connector frame 2, and an electric The road plate 4 and the circuit board 4 are provided with two, and the welding docking mechanism and the joint mechanism are detachably connected. The welding docking mechanism is used to perform welding connection with the circuit board 4. Through the welding docking mechanism, a convenient and stable connection can be performed at a position where it is inconvenient to perform OBD connection. Through the clamping mechanism, different connectors can be used according to different OBD interfaces 1 of different vehicle manufacturers, so as to cope with a variety of vehicles. Through the welding docking mechanism, when the plug 1 9 or the pin 2 11 is damaged, the circuit board 4 and the welding block 5 can be removed and connected to other plugs 1 9 for use. When the circuit board 4 is burned, the circuit board 4 can also be quickly replaced, which reduces the maintenance time and reuses the reusable parts.

[0026] like Figures 1 to 4 As shown, the welding butt mechanism includes a welding block 5, a pin hole 6 and a welding pin 7. The welding block 5 is arranged in the joint frame 2. A plurality of pin holes 6 are provided. The plurality of pin holes 6 are opened on the welding block 5 and arranged in two rows. The pin hole 6 is detachably connected to the joint mechanism. A plurality of welding pins 7 are provided. The plurality of welding pins 7 are fixedly arranged on a side of the welding block 5 away from the pin hole 6. The welding pins 7 correspond to the pin hole 6 one by one. A bearing plate 8 is fixedly arranged on a side of the welding block 5 away from the pin hole 6. The bearing plate 8 is arranged The circuit board 4 is arranged on the carrier board 8 between the two rows of welding pins 7. The two circuit boards 4 are respectively arranged on both sides of the carrier board 8 and are welded and connected with the welding pins 7. The two circuit boards 4 are respectively welded and connected with the welding pins 7 on both sides of the carrier board 8. The carrier board 8 can prevent one of the circuit boards 4 from affecting the other circuit board 4 when it is burned. The circuit board 4 is connected to the plug 1 9 through the welding block 5. When the circuit board 4 is burned or the pin 2 11 on the plug is damaged, the circuit board 4 can be directly removed through the welding block 5 for replacement.

[0027] like Figure 3 to Figure 4As shown, the connector mechanism includes a plug 9, a pin 10 and a pin 2 11. The plug 9 is detachably connected to the connector frame 2. A plurality of pins 10 are provided, and the plurality of pins 10 are fixedly arranged on the side of the plug 9 close to the connector frame 2. The pin 10 corresponds to the pin hole 6 one by one and is detachably connected. A plurality of pins 2 11 are provided, and the pin 10 corresponds to the pin 2 11 one by one and is connected. The pin 2 11 is arranged on the side of the plug 9 away from the connector frame 2. The pin 10 is connected to the circuit board 4 through the pin hole 6, and the pin hole 6 is connected to the circuit board 4 through the welding pin 7. Therefore, when the plug 9 is directly connected to the OBD interface 1 of the corresponding specification, if the pin 2 11 is damaged and needs to be repaired, the welding block 5 can be directly removed from the pin 10.

[0028] like Figure 3 to Figure 4 As shown, the plug 1 9 is detachably connected with an adapter 12, and the adapter 12 is provided with a plurality of plugs 2 13. The plug 2 13 is fixedly provided with a plurality of pins 3 14, and the pins 3 14 are provided with a plurality of pin holes 2 15 on a side of the adapter 12 away from the plug 2 13. The pins 3 14 correspond to and are connected with the pin holes 2 15 one by one. The pin holes 2 15 are detachably connected with the pin 2 11. The plug 1 9 is detachably connected with the OBD interface 1, the plug 2 13 is detachably connected with the OBD interface 1, the pin holes 2 15 on the adapter 12 are connected with the pin 2 11. The spacings of the pins 3 14 on different adapters 12 are different, and the OBD interfaces 1 of multiple manufacturers can be handled by multiple different adapters 12. At the same time, when the pin 3 14 is bent and damaged during installation, the operation can be continued by simply replacing the adapter 12, thereby improving efficiency and reducing maintenance costs.

[0029] like Figures 1 to 6 As shown, the welding docking mechanism includes a slide rail 16, a slider shaft 17, a docking groove 18, a second handle 19 and a clamping assembly. Two slide rails 16 are provided, and the two slide rails 16 are respectively opened on both sides of the joint frame 2. Two slider shafts 17 are provided, and the two slider shafts 17 are respectively slidably set on the two slide rails 16. Two docking grooves 18 are provided, and the two docking grooves 18 are respectively fixedly set on both sides of the joint frame 2 away from the slide rails 16. The two ends of the second handle 19 are respectively rotatably connected to the two slider shafts 17. Two clamping assemblies are provided, and the clamping assembly is slidably set on the docking groove 18. The clamping assembly is rotatably connected to the slider shaft 17. The clamping assembly is used to drive the OBD interface 1 to dock with the second plug 13. When the clamping assembly clamps the OBD interface 1, the OBD interface 1 can be pulled to dock with the first plug 9 or the second plug 13 by pulling the second handle 19, so that it can be operated with one hand, which improves the docking efficiency for difficult-to-operate positions and reduces the possibility of damage to the pins.

[0030] like Figure 5 to Figure 6 As shown, a sliding groove 20 and a pressure plate groove 21 are provided on the docking groove 18, the sliding groove 20 is fixedly arranged on the joint frame 2, the clamping assembly is slidably connected to the sliding groove 20, two pressure plate grooves 21 are provided, and the two pressure plate grooves 21 are fixedly arranged on both sides of the sliding groove 20, and the pressure plate groove 21 is detachably connected to the clamping assembly, and the clamping assembly includes a clamping frame 22, a sliding shaft 23, a deflection shaft 24 and a connecting rod 25, two clamping frames 22 are provided, and the clamping frames 22 are detachably connected to the OBD interface 1, and the two clamping frames 22 are respectively slidably arranged on the two docking grooves 18, and one end of the clamping frame 22 away from the docking groove 18 is detachably connected to the OBD interface 1, the sliding shaft 23 is fixedly arranged on the clamping frame 22, and the sliding shaft 23 is slidably arranged in the sliding groove 20, and two deflection shafts 24 are provided, and the two deflection shafts 24 are respectively fixedly installed on both sides of the clamping frame 22, and the deflection shaft 24 is arranged on the side of the sliding shaft 23 away from the docking groove 18, and a plurality of connecting rods 25 are provided, Each deflection shaft 24 is rotatably connected to a connecting rod 25, which is rotatably connected to the slider shaft 17. The clamping frame 22 is detachably arranged in the pressure plate groove 21. The handle 19 is pushed forward, and the slider shaft 17 can push the connecting rod 25. The connecting rod 25 pushes the clamping frame 22 to move to the outside of the pressure plate groove 21. When the sliding shaft 23 moves to the end of the sliding groove 20 away from the handle 19, the clamping frame 22 rotates to open, and the OBD interface 1 moves to between the two clamping frames 22. During the operation, handle 2 19 is pulled, so that the connecting rod 25 pulls the two clamping frames 22 to rotate in the sliding groove 20 through the sliding shaft 23 and clamps the OBD interface 1. When the two clamping frames 22 are in contact, the clamping frame 22 can slide into the pressure plate groove 21. At this time, the clamping frame 22 slides in the pressure plate groove 21, the sliding shaft 23 slides in the sliding groove 20, and the slider shaft 17 slides on the slide rail 16, so that the clamping frame 22 drives the OBD interface 1 to dock with plug 1 9 or plug 2 13.

[0031] In this embodiment, the pin hole 16 on the welding block 5 is connected to the pin 10, and the connector frame 2 is connected to the plug 19, the adapter 12 corresponding to the vehicle OBD interface 1 is connected to the plug 19, the pin 2 11 is connected to the pin hole 2 15, and the OBD interface 1 is moved between the two clamping frames 22, and the handle 2 19 is pulled so that the connecting rod 25 pulls the two clamping frames 22 to rotate in the sliding groove 20 through the sliding shaft 23 and clamps the OBD interface 1. When the two clamping frames 22 are in contact, the clamping frame 22 can slide into the pressure plate groove 21. At this time, the clamping frame 22 slides in the pressure plate groove 21, the sliding shaft 23 slides in the sliding groove 20, the slider shaft 17 slides on the slide rail 16, and the clamping frame 22 drives the OBD interface 1 to connect with the plug 2 13, and the pin 3 14 is inserted into the connecting hole on the OBD interface 1.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle fault diagnosis device, comprising an OBD interface (1), wherein the OBD interface (1) is arranged on a vehicle, and is characterized in that: Also includes: Connector frame (2); A connector mechanism, the connector mechanism being detachably arranged on the connector frame (2), the connector mechanism being used to connect with the OBD interface (1) having a different pin number; Handle 1 (3), the handle 1 (3) being fixedly arranged on a side of the joint frame (2) away from the joint mechanism; a fastening connection mechanism, the fastening connection mechanism being arranged on the joint frame (2), the fastening connection mechanism being detachably connected to the OBD interface (1), and the fastening connection mechanism being used to fasten the OBD interface (1) to the joint mechanism; A welding butt joint mechanism, the welding butt joint mechanism is arranged in the joint frame (2), a circuit board (4) is arranged in the welding butt joint mechanism, two circuit boards (4) are arranged, the welding butt joint mechanism is detachably connected to the joint mechanism, and the welding butt joint mechanism is used to be welded to the circuit board (4).

2. The vehicle fault diagnosis device according to claim 1, characterized in that: The welding butt joint mechanism comprises: A welding block (5), wherein the welding block (5) is arranged in the joint frame (2); A pin hole one (6), wherein a plurality of the pin holes one (6) are provided, and the plurality of pin holes one (6) are opened on the welding block (5) and arranged in two rows, and the pin hole one (6) is detachably connected to the joint mechanism; A welding pin (7), wherein a plurality of the welding pins (7) are provided, and the plurality of the welding pins (7) are fixedly arranged on a side of the welding block (5) away from the pin hole one (6), and the welding pins (7) correspond one to one with the pin hole one (6).

3. The vehicle fault diagnosis device according to claim 2, characterized in that: A carrier plate (8) is fixedly arranged on a side of the welding block (5) away from the first pin hole (6); the carrier plate (8) is arranged between two rows of welding pins (7); the circuit board (4) is arranged on the carrier plate (8); and the two circuit boards (4) are respectively arranged on both sides of the carrier plate (8) and are welded to the welding pins (7).

4. The vehicle fault diagnosis device according to claim 3, characterized in that: The joint mechanism comprises: Plug one (9), the plug one (9) being detachably connected to the connector frame (2); Pin one (10), a plurality of pins one (10) are provided, the plurality of pins one (10) are fixedly provided on one side of the plug one (9) close to the connector frame (2), the pins one (10) correspond one to one with the pin holes one (6) and are detachably connected; Pin 2 (11), a plurality of pins 2 (11) are provided, the pin 1 (10) corresponds to and is connected to the pin 2 (11) in a one-to-one manner, and the pin 2 (11) is provided on a side of the plug 1 (9) away from the connector frame (2).

5. The vehicle fault diagnosis device according to claim 4, characterized in that: The plug one (9) is detachably connected to an adapter (12), wherein the adapter (12) is provided in plurality, a plug two (13) is provided on the adapter (12), a plurality of pin threes (14) are fixedly provided in the plug two (13), wherein the pin threes (14) are provided in plurality, a plurality of pin holes twos (15) are provided on a side of the adapter (12) away from the plug two (13), the pin threes (14) correspond to and are connected to the pin holes twos (15) in a one-to-one manner, and the pin holes twos (15) are detachably connected to the pin twos (11).

6. The vehicle fault diagnosis device according to claim 5, characterized in that: The first plug (9) is detachably connected to the OBD interface (1), and the second plug (13) is detachably connected to the OBD interface (1).

7. The vehicle fault diagnosis device according to claim 6, characterized in that: The welding butt joint mechanism comprises: A slide rail (16), wherein two slide rails (16) are provided, and the two slide rails (16) are respectively arranged on two sides of the joint frame (2); A slider rotating shaft (17), wherein two slider rotating shafts (17) are provided, and the two slider rotating shafts (17) are respectively slidably provided on the two slide rails (16).

8. The vehicle fault diagnosis device according to claim 7, characterized in that: The welding butt joint mechanism comprises: A docking groove (18), wherein two docking grooves (18) are provided, and the two docking grooves (18) are respectively fixedly arranged on two sides of the joint frame (2) away from the slide rail (16); A second handle (19), wherein both ends of the second handle (19) are rotatably connected to the two slider shafts (17); A clamping assembly, wherein two clamping assemblies are provided, the clamping assembly is slidably arranged on the docking groove (18), the clamping assembly is rotationally connected to the slider shaft (17), and the clamping assembly is used to drive the OBD interface (1) to dock with the second plug (13).

9. The vehicle fault diagnosis device according to claim 8, characterized in that: The docking groove (18) is provided with: A sliding groove (20), the sliding groove (20) being fixedly arranged on the joint frame (2), the clamping assembly being slidably connected to the sliding groove (20); A pressure plate groove (21), wherein two pressure plate grooves (21) are provided, and the two pressure plate grooves (21) are fixedly arranged on both sides of the sliding groove (20), and the pressure plate grooves (21) are detachably connected to the clamping assembly.

10. The vehicle fault diagnosis device according to claim 9, characterized in that: The clamping assembly comprises: A clamping frame (22), wherein two clamping frames (22) are provided, and the clamping frames (22) are detachably connected to the OBD interface (1), and the two clamping frames (22) are respectively slidably arranged on the two docking grooves (18), and an end of the clamping frame (22) away from the docking groove (18) is detachably connected to the OBD interface (1); A sliding shaft (23), the sliding shaft (23) being fixedly arranged on the clamping frame (22), and the sliding shaft (23) being slidably arranged in the sliding groove (20); A deflection shaft (24), wherein two deflection shafts (24) are provided, and the two deflection shafts (24) are respectively fixedly mounted on two sides of the clamping frame (22), and the deflection shaft (24) is arranged on a side of the sliding shaft (23) away from the docking groove (18); A connecting rod (25), wherein a plurality of connecting rods (25) are provided, and each of the deflection shafts (24) is rotatably connected to one of the connecting rods (25), and the connecting rod (25) is rotatably connected to the slider rotating shaft (17).

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