Device for detecting short circuit of automobile line

Abstract

The invention discloses a device for detecting short circuit of an automobile line, which relates to the technical field of automobile line detection and comprises two protective covers. A sliding groove is formed in the upper portion of an inner cavity of the protection cover, an inner cavity of the sliding groove is communicated with the inner cavity of the protection cover, the inner cavity of the sliding groove is slidably connected with a force application assembly, one side of the force application assembly is slidably connected with a first air pipe, an insulating layer is placed in the inner cavity of the protection cover, and an alligator clip is arranged in an inner cavity of the insulating layer and used for connecting lines. According to the invention, the insulating layer is placed in the inner cavity of the protective cover, and then the alligator clip is arranged in the inner cavity of the insulating layer, so that the alligator clip can be protected by using the protective cover and the insulating layer, and the alligator clip is moved to a specified line position by using the cooperation of the first telescopic rod assembly and the second telescopic rod assembly at the line position where detection personnel cannot directly contact. And then the force application assembly is moved to drive the alligator clip to unfold, so that the alligator clip can be used for connecting the circuit, and then a detector can conveniently detect the position circuit which is difficult to contact.

Description

Technical Field

[0001] The invention relates to the technical field of automobile line detection, and in particular to a device for detecting automobile line short circuit. Background Art

[0002] Automobile wiring short circuit is one of the common faults in automobile electrical systems. It not only causes electrical equipment to fail to work properly, but may also cause serious consequences such as fire. Therefore, timely and accurate detection of automobile wiring short circuit is crucial to ensure automobile driving safety.

[0003] During the short-circuit detection of automobile lines, inspectors face multiple challenges, mainly due to the obstruction of automobile parts and the difficulty of contact between the transmitter clip and the line. First, the internal space of the car is limited, especially in key areas such as the engine compartment and chassis, where the lines are dense and complex. This space limitation greatly restricts the smooth progress of the detection work. In addition, the existence of many automobile parts such as the engine, gearbox, seat, dashboard, etc., not only takes up a lot of space, but also often directly blocks the direct contact of the inspectors to the lines, making it particularly difficult to find the short-circuit point, especially when the short-circuit point is located under these parts or in a hidden place, it is even more difficult;

[0004] Secondly, the contact problem between the transmitter clip and the line is also a major obstacle in the detection process. In a limited and complex operating environment, it is not easy to ensure that the clip can accurately and stably contact the short-circuit line. Imprecise contact may directly lead to errors or misjudgments in the detection results, thereby affecting the accuracy of fault location and repair. In addition, the design of some transmitter clips has limitations, is not flexible enough or has poor adaptability, and is difficult to adapt to lines of different shapes, sizes and positions, which further increases the difficulty and complexity of detection. Summary of the invention

[0005] The object of the present invention is to provide a device for detecting short circuit of automobile lines to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A device for detecting short circuits in automobile circuits comprises two protective covers; a slide groove is provided on the upper part of an inner cavity of the protective cover, and the inner cavity of the slide groove is communicated with the inner cavity of the protective cover; a force-applying component is slidably connected to the inner cavity of the slide groove, and an air pipe is slidably connected to one side of the force-applying component; an insulating layer is placed in the inner cavity of the protective cover, and an alligator clip is provided in the inner cavity of the insulating layer, and the alligator clip is used to connect the circuit; a first telescopic rod assembly is fixedly connected to one side of the protective cover away from the insulating layer, and a second telescopic rod assembly is slidably connected to the outer surface of the first telescopic rod assembly.

[0008] A further improvement of the technical solution of the present invention is that: the force-applying component includes a slider, a rubber block is fixedly connected to the lower end of the slider, the inner cavity of the slider is slidably connected to the outer surface of the first telescopic rod assembly, a spring is fixedly connected to the side of the slider away from trachea one, and the spring is fixedly connected to the side of the inner cavity of the slide groove away from trachea one.

[0009] The above technical solution is adopted, in which the slider is slidably connected with the air pipe 1, so that gas can be transported into the inner cavity of the slider through the air pipe 1, and then the slider is pushed to slide on the outer surface of the air pipe 1, so that the slider can be pushed to move in the direction of spring 1, and then the rubber block can be driven to apply force to the insulating layer, so as to drive the alligator clip to open, and then it is convenient to connect the alligator clip to the automobile line, so as to facilitate the automobile short-circuit detector to detect the automobile line.

[0010] A further improvement of the technical solution of the present invention is that the slider is T-shaped, and the slider on the same side is slidably connected to the inner cavity of the slide groove.

[0011] The above technical solution is adopted, in which the slider is set to be T-shaped, so that when the slider moves, it can remain stable and reduce fluctuations during the movement, which would otherwise cause the rubber block to damage the insulating layer.

[0012] A further improvement of the technical solution of the present invention is that the rubber block is arranged in an arc shape, and the inner cavity of the rubber block is in contact with the outer surface of the insulating layer.

[0013] The above technical solution is adopted, in which the rubber block is set to an arc shape, so that the rubber block can fit with the outer surface of the insulating layer, so that when the slider drives the rubber block to move, the rubber block can evenly apply force to the alligator clip, allowing the alligator clip to unfold smoothly.

[0014] A further improvement of the technical solution of the present invention is that the first telescopic rod assembly includes a connecting rod 1, a side of the connecting rod 1 close to the protective cover is fixedly connected to the protective cover, a plurality of limiting holes are opened on one side of the connecting rod 1, and a connecting hole 1 is opened on the side of the connecting rod 1 close to the protective cover.

[0015] The above-mentioned technical solution is adopted, in which a plurality of limit holes are opened on one side of connecting rod one, so that the position of connecting rod one can be limited by utilizing the matching surface of the limit holes and the limit assembly, so that the position of connecting rod one in the inner cavity of connecting rod two can be adjusted according to the detection requirements, and then the length of the device can be adjusted, so as to facilitate extending the protective cover into a position where it is inconvenient for the detection personnel to directly contact the line.

[0016] A further improvement of the technical solution of the present invention is that: the second telescopic rod assembly includes a connecting rod 2 and a bellows, the bellows is located in the inner cavity of the connecting rod 2, the outer surface of the connecting rod 1 is slidably connected to the inner cavity of the connecting rod 2, a side of the connecting rod 2 away from the protective cover is fixedly connected with a pressurized ball, a connecting hole 2 is provided on the side of the connecting rod 2 close to the limiting hole, the inner cavity of the connecting hole 2 is fixedly connected with the limiting assembly, the input end of the bellows passes through the end face of the pressurized ball and extends to the inner cavity of the pressurized ball, a side of the bellows close to the protective cover is fixedly connected with an trachea 2, the trachea 2 is fixedly connected to the connecting hole 1, and the output end of the trachea 2 is fixedly connected to the input end of the trachea 1.

[0017] The above technical solution is adopted, in which a pressurizing ball is connected to a bellows, so that the inspector can squeeze the pressurizing ball to transport the gas in the inner cavity of the pressurizing ball to the inner cavity of trachea one through the cooperation of the bellows and trachea two, and then push the slider to move, so that the slider can be used to drive the rubber block to move, and then a force is applied to the crocodile clip to open the crocodile clip, thereby facilitating the connection of the crocodile clip to the line, and then during the detection process, the phenomenon of the crocodile clip being separated from the line can be avoided, and the connecting rod two is slidably connected to the connecting rod one, so that when the device is not in use, the connecting rod two can be used to store the connecting rod one, thereby reducing the storage area of ​​the device and making it easier to carry the device.

[0018] A further improvement of the technical solution of the present invention is that the limiting assembly includes a shell, a threaded block is threadedly connected to the inner cavity of the shell, and a block assembly used in conjunction with a plurality of limit holes is provided on one side of the shell close to the limit hole, and the block assembly is used to limit the first telescopic rod assembly.

[0019] The above technical solution is adopted, in which the outer shell is threadedly connected to the threaded block, so that the threaded block can be rotated to change the position of the threaded block in the inner cavity of the outer shell, and then the clamping block assembly can be driven to move in the inner cavity of the outer shell.

[0020] A further improvement of the technical solution of the present invention is that the block assembly includes a protrusion, the protrusion is slidably connected to the shell, a side of the protrusion close to the threaded block is fixedly connected to a spring 2, a side of the spring 2 away from the protrusion is fixedly connected to a connecting block, and the connecting block is rotatably connected to the threaded block.

[0021] The above-mentioned technical solution is adopted, in which spring 2 is fixedly connected to the protrusion, so that when the threaded block rotates, the connecting block will not be driven to rotate. However, when the position of the threaded block in the inner cavity of the shell changes, it can drive the clamping block assembly to move. During the movement of the connecting block, a force is applied to spring 2, driving spring 2 to contract, and then under the action of the elastic force of spring 2 itself, spring 2 will be driven to extend, and then the protrusion will be pushed to move in the direction away from the threaded block, so that with the cooperation of the protrusion and the limiting hole, the position of connecting rod 1 in the inner cavity of connecting rod 2 can be limited.

[0022] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0023] 1. The present invention provides a device for detecting short circuits in automobile circuits. An insulating layer is placed in the inner cavity of a protective cover, and then an alligator clip is arranged in the inner cavity of the insulating layer, so that the protective cover and the insulating layer can be used to protect the alligator clip. A force-applying component is slidably connected in the inner cavity of a slide groove, so that when the force-applying component moves, a force can be applied to the insulating layer, and then the force is transmitted to the alligator clip through the insulating layer, so that the alligator clip can be opened easily. In this way, at a circuit position that a detection personnel cannot directly contact, the alligator clip can be moved to a designated circuit position by using the cooperation of a first telescopic rod component and a second telescopic rod component, and then the alligator clip can be driven to unfold by moving the force-applying component, so that the alligator clip can be used to connect the circuit, and then it is convenient for detection personnel to detect circuits in difficult-to-contact locations, thereby improving the detection quality of detection personnel, reducing the difficulty of detection, and thus improving detection efficiency.

[0024] 2. The present invention provides a device for detecting short circuits in automobile circuits. The pressure ball is connected to the bellows, so that the inspector can squeeze the pressure ball to transport the gas in the inner cavity of the pressure ball to the inner cavity of the trachea one through the cooperation of the bellows and the trachea two, and then push the slider to move, so that the slider can be used to drive the rubber block to move, and then a force is applied to the crocodile clip to open the crocodile clip, so as to facilitate the connection between the crocodile clip and the circuit. Then, during the detection process, the phenomenon of the crocodile clip being separated from the circuit can be avoided. The connecting rod two is slidably connected to the connecting rod one, so that when the device is not in use, the connecting rod two can be used to store the connecting rod one, thereby reducing the storage area of ​​the device and facilitating the carrying of the device, thereby improving the practicality and universality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the protective cover of the present invention;

[0028] Figure 3 It is a schematic diagram of the chute of the present invention;

[0029] Figure 4 It is a schematic diagram of the alligator clip of the present invention;

[0030] Figure 5 It is a schematic diagram of a force-applying component of the present invention;

[0031] Figure 6 A schematic diagram of a trachea according to the present invention;

[0032] Figure 7 is a schematic diagram of a first telescopic rod assembly of the present invention;

[0033] Figure 8 is a schematic diagram of a second telescopic rod assembly of the present invention;

[0034] Fig. 9 It is an enlarged schematic diagram of point A of the present invention;

[0035] Fig.10 It is a schematic diagram of the limiting component of the present invention.

[0036] In the figure: 1. protective cover; 11. slide groove; 12. force-applying assembly; 121. slider; 122. spring 1; 123. rubber block; 13. air pipe 1; 2. insulating layer; 21. alligator clip; 3. first telescopic rod assembly; 31. connecting rod 1; 32. limiting hole; 33. connecting hole 1; 4. second telescopic rod assembly; 41. connecting rod 2; 42. pressurizing ball; 43. bellows; 44. air pipe 2; 5. connecting hole 2; 6. limiting assembly; 61. housing; 62. threaded block; 63. block assembly; 631. bump; 632. spring 2; 633. connecting block. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with embodiments:

[0038] Example 1

[0039] like Figure 1-10 As shown, the present invention provides a device for detecting short circuit of automobile circuits, comprising two protective covers 1; a slide groove 11 is provided on the upper part of the inner cavity of the protective cover 1, and the inner cavity of the slide groove 11 is communicated with the inner cavity of the protective cover 1, a force-applying component 12 is slidably connected to the inner cavity of the slide groove 11, and a trachea 13 is slidably connected to one side of the force-applying component 12, an insulating layer 2 is placed in the inner cavity of the protective cover 1, an alligator clip 21 is provided in the inner cavity of the insulating layer 2, and the alligator clip 21 is used to connect the circuit, and a first telescopic rod assembly 3 is fixedly connected to the side of the protective cover 1 away from the insulating layer 2, and a second telescopic rod assembly 4 is slidably connected to the outer surface of the first telescopic rod assembly 3.

[0040] In this embodiment, the insulating layer 2 and the crocodile clip 21 can be protected and connected by the protective cover 1, and a slide groove 11 is opened on the upper part of the protective cover 1 to facilitate the sliding of the force-applying component 12 in the inner cavity of the slide groove 11, and then the force-applying component 12 can be used to apply force to the insulating layer 2, thereby driving the crocodile clip 21 to open, and the force-applying component 12 is slidably connected with the trachea 13, and the inner cavity of the force-applying component 12 is communicated with the inner cavity of the trachea 13, so that the trachea 13 can be used to transport gas to the inner cavity of the force-applying component 12, and then drive the force-applying component 12 to move, and the crocodile clip 21 can be protected by the insulating layer 2, and the device can be connected to the line through the crocodile clip 21, so that the line can be detected, and the cooperation of the first telescopic rod assembly 3 and the second telescopic rod assembly 4 can extend the length of the device, so that the device can be connected to the line that the inspector cannot directly contact.

[0041] Example 2

[0042] like Figure 7 , Fig.10 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the first telescopic rod assembly 3 includes a connecting rod 1 31, the side of the connecting rod 1 31 close to the protective cover 1 is fixedly connected to the protective cover 1, a plurality of limiting holes 32 are opened on one side of the connecting rod 31, a connecting hole 33 is opened on the side of the connecting rod 31 close to the protective cover 1, the limiting assembly 6 includes a shell 61, the inner cavity of the shell 61 is threadedly connected with a threaded block 62, the side of the shell 61 close to the limiting hole 32 is provided with a block assembly 63 used in conjunction with the plurality of limiting holes 32, the block assembly 63 is used to limit the first telescopic rod assembly 3, the block assembly 63 includes a protrusion 631, the protrusion 631 is slidably connected to the shell 61, a spring 2 632 is fixedly connected to the side of the protrusion 631 close to the threaded block 62, the side of the spring 2 632 away from the protrusion 631 is fixedly connected to the connecting block 633, and the connecting block 633 is rotatably connected to the threaded block 62.

[0043] In this embodiment, when the alligator clip 21 needs to be connected to the circuit, the overall length of the device needs to be adjusted according to the position of the detection circuit. The detection personnel applies a force to the connecting rod 1 31 to slide the connecting rod 1 31 out of the inner cavity of the connecting rod 2 41. In the process of sliding the connecting rod 1 31 out, the connecting rod 1 31 will apply a force to the protrusion 631, and then drive the spring 2 632 to contract, so that the protrusion 631 can be separated from the inner cavity of the adjacent limiting hole 32 by utilizing the contraction of the spring 2 632. Then, when the length of the device is adjusted to a suitable position, the spring 2 632 will be connected to the inner cavity of the adjacent limiting hole 32. The inspector then rotates the threaded block 62 to change the position of the threaded block 62 in the inner cavity of the shell 61, and then drives the connecting block 633 to move together, and then applies a force to the spring 2 632 through the connecting block 633 to drive the spring 2 632 to contract, and then under the elastic force of the spring 2 632 itself, the spring 2 632 will be driven to extend, and then the protrusion 631 will be pushed to move in the direction of the limiting hole 32, so that the protrusion 631 and the limiting hole 32 are closely fitted, thereby enhancing the direct friction between the protrusion 631 and the limiting hole 32, so that the position of the connecting rod 1 31 in the inner cavity of the connecting rod 2 41 can be limited.

[0044] Example 3

[0045] like Figure 8 , Fig. 9 As shown, on the basis of Example 2, the present invention provides a technical solution: preferably, the second telescopic rod assembly 4 includes a connecting rod 41 and a bellows 43, the bellows 43 is located in the inner cavity of the connecting rod 41, the outer surface of the connecting rod 1 31 is slidably connected to the inner cavity of the connecting rod 41, the side of the connecting rod 41 away from the protective cover 1 is fixedly connected with a pressurizing ball 42, the side of the connecting rod 41 close to the limiting hole 32 is provided with a connecting hole 5, the inner cavity of the connecting hole 5 is fixedly connected to the limiting assembly 6, the input end of the bellows 43 passes through the end face of the pressurizing ball 42 and extends to the inner cavity of the pressurizing ball 42, the side of the bellows 43 close to the protective cover 1 is fixedly connected with an air pipe 44, the air pipe 44 is fixedly connected to the connecting hole 1 33, and the output end of the air pipe 44 is fixedly connected to the input end of the air pipe 13.

[0046] In this embodiment, when the connecting rod 31 moves, since the connecting hole 33 is fixedly connected to the air pipe 44, when the connecting hole 33 moves, the air pipe 44 will be driven to move together, and then the air pipe 44 will be used to drive the bellows 43 to extend, so as to extend the length of the bellows 43. When the position adjustment of the connecting rod 31 is completed, the inspector then holds the connecting rod 41 to drive the device to the position of the line that needs to be inspected, and then the inspector applies force to the pressurizing ball 42 to transport the gas in the inner cavity of the pressurizing ball 42 to the inner cavity of the air pipe 13 through the cooperation of the bellows 43 and the air pipe 44.

[0047] Example 4

[0048] like Figure 4-6 As shown, on the basis of Example 3, the present invention provides a technical solution: preferably, the force-applying component 12 includes a slider 121, a rubber block 123 is fixedly connected to the lower end of the slider 121, the inner cavity of the slider 121 is slidably connected to the outer surface of the trachea 13, a spring 122 is fixedly connected to the side of the slider 121 away from the trachea 13, the spring 122 is fixedly connected to the side of the inner cavity of the slide groove 11 away from the trachea 13, the slider 121 is T-shaped, the slider 121 on the same side is slidably connected to the inner cavity of the slide groove 11, the rubber block 123 is arranged in an arc shape, and the inner cavity of the rubber block 123 is in contact with the outer surface of the insulating layer 2.

[0049] In this embodiment, since the inner cavity of the trachea 13 is connected with the inner cavity of the slider 121, the gas in the inner cavity of the trachea 13 will drive the slider 121 to move in the direction of the spring 122, and then the slider 121 will drive the rubber block 123 to apply a force to the insulating layer 2, which can be transmitted to the alligator clip 21 through the insulating layer 2, and then apply a force to the alligator clip 21, so as to drive the alligator clip 21 to open, and then use the alligator clip 21 to connect the line, then the inspection personnel stop applying force to the pressurized ball 42, and then under the action of several springs 122, the slider 121 will be pushed to move in the direction away from the spring 122, so as to drive the rubber block 123 away, and then in the absence of external force, under the action of the torsion spring elastic force of the alligator clip 21 itself, the alligator clip 21 will be driven to close, and then the connection of the line is completed.

[0050] The working principle of the device for detecting automobile line short circuit is described in detail below.

[0051] like Figure 1-10As shown, when the alligator clip 21 needs to be connected to the circuit, the overall length of the device needs to be adjusted according to the position of the detection circuit. The detection personnel applies a force to the connecting rod 1 31 to slide the connecting rod 1 31 out of the inner cavity of the connecting rod 2 41. In the process of sliding the connecting rod 1 31 out, the connecting rod 1 31 will apply a force to the protrusion 631, and then drive the spring 2 632 to contract. The contraction of the spring 2 632 can be used to separate the protrusion 631 from the inner cavity of the adjacent limiting hole 32. Then, when the length of the device is adjusted to a suitable position, the spring 2 632 will contact the inner cavity of the adjacent limiting hole 32. Then the inspector rotates the threaded block 62 to change the position of the threaded block 62 in the inner cavity of the housing 61, and then drives the connecting block 633 to move together, and then applies a force to the second spring 632 through the connecting block 633 to drive the second spring 632 to contract, and then under the elastic force of the second spring 632 itself, the second spring 632 will be driven to extend, and then the protrusion 631 will be pushed to move in the direction of the limiting hole 32, so that the protrusion 631 and the limiting hole 32 are closely fitted, and the direct friction between the protrusion 631 and the limiting hole 32 is enhanced, so that the position of the connecting rod 1 31 in the inner cavity of the second connecting rod 41 can be limited;

[0052] Then, when the connecting rod 1 31 moves, since the connecting hole 1 33 is fixedly connected to the air pipe 2 44, when the connecting hole 1 33 moves, the air pipe 2 44 will be driven to move together, and then the air pipe 2 44 will be used to drive the bellows 43 to extend, so that the length of the bellows 43 can be extended. After the position adjustment of the connecting rod 1 31 is completed, the inspector then holds the connecting rod 2 41 to drive the device to the line position to be inspected, and then the inspector applies force to the pressurizing ball 42 to transport the gas in the inner cavity of the pressurizing ball 42 to the inner cavity of the air pipe 1 13 through the cooperation of the bellows 43 and the air pipe 2 44;

[0053] Since the inner cavity of the trachea 13 is connected with the inner cavity of the slider 121, the gas in the inner cavity of the trachea 13 will drive the slider 121 to move in the direction of the spring 122, and then the slider 121 will drive the rubber block 123 to apply a force to the insulating layer 2, which can be transmitted to the crocodile clip 21 through the insulating layer 2, and then apply a force to the crocodile clip 21, so that the crocodile clip 21 can be driven to open, and then the crocodile clip 21 is used to connect the line, and then the inspection personnel stop applying a force to the pressurized ball 42, and then under the action of the plurality of springs 122, the slider 121 will be pushed to move in the direction away from the spring 122, so that the rubber block 123 can be driven away, and then, in the absence of external force, under the action of the torsion spring elastic force of the crocodile clip 21 itself, the crocodile clip 21 will be driven to close, and then the connection of the line is completed;

[0054] Then repeat the above steps to complete the connection between the other side of the line and the device, then start the device, send a signal to the line under test through the transmitter, and use the sound or visual indication function of the detector to detect along the wire or at different points. When a short circuit is detected, the device will emit a specific sound or visual signal to prompt, and then quickly locate the specific position of the short circuit according to the prompt information of the device. Through further analysis and detection, the cause of the short circuit can be confirmed and repaired.

[0055] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A device for detecting short circuits in automobile circuits, comprising two protective covers (1); characterized in that: A slide groove (11) is provided at the upper part of the inner cavity of the protective cover (1), and the inner cavity of the slide groove (11) is communicated with the inner cavity of the protective cover (1); the inner cavity of the slide groove (11) is slidably connected to a force-applying component (12); one side of the force-applying component (12) is slidably connected to an air pipe (13); an insulating layer (2) is placed in the inner cavity of the protective cover (1); an alligator clip (21) is provided in the inner cavity of the insulating layer (2); the alligator clip (21) is used to connect the line; a first telescopic rod component (3) is fixedly connected to the side of the protective cover (1) away from the insulating layer (2); and a second telescopic rod component (4) is slidably connected to the outer surface of the first telescopic rod component (3).

2. The device for detecting short circuit of automobile circuits according to claim 1, characterized in that: The force-applying assembly (12) comprises a slider (121), the lower end of which is fixedly connected to a rubber block (123), the inner cavity of the slider (121) is slidably connected to the outer surface of the trachea (13), the side of the slider (121) away from the trachea (13) is fixedly connected to a spring (122), and the spring (122) is fixedly connected to the side of the inner cavity of the slide groove (11) away from the trachea (13).

3. The device for detecting short circuit of automobile circuit according to claim 2, characterized in that: The sliding block (121) is T-shaped, and the sliding block (121) on the same side is slidably connected to the inner cavity of the sliding groove (11).

4. The device for detecting short circuit of automobile circuits according to claim 2, characterized in that: The rubber block (123) is arranged in an arc shape, and the inner cavity of the rubber block (123) is in contact with the outer surface of the insulating layer (2).

5. The device for detecting short circuit of automobile circuits according to claim 1, characterized in that: The first telescopic rod assembly (3) comprises a connecting rod (31), wherein the side of the connecting rod (31) close to the protective cover (1) is fixedly connected to the protective cover (1), a plurality of limiting holes (32) are provided on one side of the connecting rod (31), and a connecting hole (33) is provided on the side of the connecting rod (31) close to the protective cover (1).

6. The device for detecting short circuit of automobile circuits according to claim 5, characterized in that: The second telescopic rod assembly (4) comprises a second connecting rod (41) and a bellows (43), wherein the bellows (43) is located in the inner cavity of the second connecting rod (41), the outer surface of the first connecting rod (31) is slidably connected to the inner cavity of the second connecting rod (41), the side of the second connecting rod (41) away from the protective cover (1) is fixedly connected to a pressurizing ball (42), the side of the second connecting rod (41) close to the limiting hole (32) is provided with a second connecting hole (5), the inner cavity of the second connecting hole (5) is fixedly connected to the limiting assembly (6), the input end of the bellows (43) passes through the end surface of the pressurizing ball (42) and extends to the inner cavity of the pressurizing ball (42), the side of the bellows (43) close to the protective cover (1) is fixedly connected to a second air pipe (44), the second air pipe (44) is fixedly connected to the first connecting hole (33), and the output end of the second air pipe (44) is fixedly connected to the input end of the first air pipe (13).

7. The device for detecting short circuit of automobile circuits according to claim 6, characterized in that: The limiting assembly (6) comprises a shell (61), the inner cavity of the shell (61) is threadedly connected to a threaded block (62), and a block assembly (63) for use in conjunction with a plurality of limiting holes (32) is provided on one side of the shell (61) close to the limiting holes (32), and the block assembly (63) is used to limit the first telescopic rod assembly (3).

8. The device for detecting short circuit of automobile circuits according to claim 7, characterized in that: The clamping block assembly (63) comprises a protrusion (631), wherein the protrusion (631) is slidably connected to the housing (61), a side of the protrusion (631) close to the threaded block (62) is fixedly connected to a second spring (632), a side of the second spring (632) away from the protrusion (631) is fixedly connected to a connecting block (633), and the connecting block (633) is rotatably connected to the threaded block (62).

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