Electric vehicle instrument detection device

Abstract

The invention discloses an electric vehicle instrument detection device, and particularly relates to the technical field of electric vehicle instrument detection.The electric vehicle instrument detection device comprises a bottom plate, supporting rods used for supporting are fixedly connected to the four corners of the upper end of the bottom plate, a driving assembly is fixedly installed at the right end of the bottom plate through a rectangular plate, and the upper ends of the four supporting rods are jointly and fixedly connected with a concave shell; a limiting assembly is fixedly installed on the bottom wall of the concave shell. According to the electric vehicle instrument detection device, through arrangement of the driving assembly, in the use process, through switching of the position of the driving assembly, switching between limiting during detection of an electric vehicle instrument and jacking after detection is completed can be achieved, and through mutual cooperation of the arranged limiting assembly and the driving assembly, the detection efficiency is improved. The driving assembly can assist the limiting assembly to detect the electric vehicle instrument through the change of air pressure, the overall detection operation is convenient and easy to operate, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicle instrument detection, in particular to an electric vehicle instrument detection device. BACKGROUND

[0002] The electric vehicle instrument detection device aims to check and verify the function and performance of electric vehicle instruments by simulating the working state of electric vehicles. Electric vehicle instruments usually include displaying battery power, speed, driving distance, etc. These information is crucial to the driver, so the detection of the instrument is very strict. The electric vehicle instrument detection device simulates the voltage, current, speed and other signals of the electric vehicle to test whether the instrument can accurately and timely respond to these changes and output correct display data. The design of the detection device generally includes input signal source, control system, instrument installation platform, display module, etc. It can comprehensively detect the instrument under different working conditions.

[0003] The working principle of the device is to input analog signals to control the response of the electric vehicle instrument under different working conditions, and then judge the working accuracy and stability of the instrument. Common detection functions include battery power display test, speedometer accuracy test, odometer accuracy test, etc. The equipment usually has data recording and analysis function, can display test results in real time, and can determine whether the instrument is qualified according to the preset standard. Such devices are widely used in electric vehicle production, maintenance and quality control.

[0004] However, the electric vehicle instrument detection device in the prior art has certain deficiencies in actual use, especially when a large number of electric power sources are needed for detection, for example, different working states of the electric vehicle need to be simulated during the detection process, such as acceleration, braking, battery discharge, etc. These situations usually need to provide different voltage and current inputs through multiple electric power sources. In order to ensure that the instrument can be accurately tested under various conditions, the existing detection device usually needs multiple independent power sources to realize these simulation functions. This method not only makes the entire detection process cumbersome and complicated to operate, but also requires a large number of electric devices to realize comprehensive detection of electric vehicle instruments.

[0005] In addition, the existing detection device is usually large in size and complex in configuration, which is not suitable for on-site sampling detection. In actual application, especially in the production line or after-sales service, many times it is necessary to quickly and efficiently detect a large number of electric vehicle instruments. Due to the bulkiness of the detection device and the need for complex power supply configuration, it is not convenient to move to the scene for sampling detection. Therefore, the detection device in the prior art still needs to be improved in terms of convenience and on-site applicability.

[0006] CN116593796B discloses a kind of detection device for electric vehicle instrument production, including workbench, multimeter, storage structure, drive structure, clamping structure, placement structure, limiting structure, collection structure and detection gun, the setting of placement structure is convenient for the fixation of multimeter, also can adjust the angle of multimeter, to facilitate detection personnel to watch detection data, improve practicality, the setting of storage structure is convenient for the storage of instrument, avoids instrument falling, drive structure drives storage structure to ascend to facilitate the detection of instrument in storage structure, improve flexibility, the setting of limiting structure is convenient for drive structure to drive storage structure to ascend, after fixing storage structure, improve stability The setting of clamping structure is convenient for the clamping of instrument wire, to facilitate the detection of instrument by multimeter, improve operation flexibility.

[0007] Although the device in the above patent document can detect electric vehicle instruments during use, it is too large in actual use and cannot be transported to the scene for sampling detection, thereby reducing the efficiency of sampling detection. SUMMARY

[0008] The main purpose of the present application is to provide an electric vehicle instrument detection device that can effectively solve the problems in the background art.

[0009] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0010] An electric vehicle instrument detection device, comprising a bottom plate, the bottom plate upper end four corners are all fixedly connected with support rods for supporting, the bottom plate right end is fixedly installed with a drive assembly through a rectangular plate, the upper ends of the four support rods are commonly fixedly connected with a concave shell, and the bottom wall of the concave shell is fixedly installed with a limiting assembly.

[0011] Preferably, a placement groove is formed in the middle right side of the bottom wall of the concave shell, a fixing hole is formed in the right part of the front side wall of the inner surface of the concave shell, a placement hole is formed in the middle of the bottom wall of the placement groove, and ejection holes are formed in the middle left and right sides of the bottom wall of the placement groove. A sliding groove is formed in the middle lower side of the right end of the concave shell, guide grooves are formed in the middle of the front side wall and the middle of the rear side wall of the inner surface of the sliding groove, pipe placement grooves are formed in the front side upper part and the rear side wall upper part of the inner surface of the placement hole, and air holes are formed in the lower part of the front side wall and the lower part of the rear side wall of the inner surface of the placement hole. The air holes are in communication with the outside of the concave shell.

[0012] Preferably, the placement hole, the air hole and the two ejection holes are in communication with the inner cavity of the sliding groove.

[0013] Preferably, the driving assembly comprises a cavity box, the lower end of the cavity box is fixedly connected with the right end of the book searching bottom plate through a rectangular plate, a push plate is slidably connected with the inner surface of the cavity box, a handle is fixedly connected with the right end middle part of the push plate, and a switching assembly is slidably installed on the right side wall middle part of the inner surface of the cavity box.

[0014] Preferably, the switching assembly comprises a gas injection pipe, a sliding hole is formed in the right side wall middle part of the inner surface of the cavity box, the gas injection pipe is slidably connected with the inner surface of the sliding hole, a connecting plate is fixedly connected with the rear side of the outer surface of the gas injection pipe, the upper left side and the right side and the lower right side and the right side of the connecting plate are fixedly connected with an adapter plate, the upper ends of the two adapter plates located at the upper part are fixedly connected with a horizontal plate, the two adapter plates located at the lower side are slidably connected with the upper side of the rectangular plate, the left side and the right side of the front side wall and the left side and the right side of the rear side wall of the outer surface of the gas injection pipe are fixedly connected with a guide plate, two main holes are formed in the left part of the upper side of the outer surface of the gas injection pipe, and a secondary hole is formed in the front side and the rear side of the outer surface of the gas injection pipe, and the two secondary holes are located between the two main holes.

[0015] Preferably, the guide plates on the same side are slidably connected with the inner surfaces of the guide grooves on the same side, the left side of the outer surface of the gas injection pipe is located in the inner cavity of the sliding groove, and the outer surface of the gas injection pipe and the inner surface of the sliding groove are mutually attached.

[0016] Preferably, the limiting assembly comprises two C-shaped pipes, the inlet ends of the two C-shaped pipes are fixedly connected with the inner surfaces of the air holes on the same side, the outlet ends of the two C-shaped pipes are fixedly connected with the inner surfaces of the fixing holes on the same side, the right part of the front side wall of the inner surface of the concave shell and the right side of the rear side wall of the inner surface are fixedly connected with an air groove plate, the inner surfaces of the two air groove plates are fixedly connected with a rectangular block on the side close to each other, the ends of the two rectangular blocks away from each other are linearly arrayed with a plurality of circular holes, the middle parts of the left side walls and the right side walls of the inner surfaces of the plurality of circular holes are formed with a limiting groove, the plurality of circular holes are slidably connected with an extrusion rod, the left sides and the right sides of the outer surfaces of the plurality of extrusion rods are fixedly connected with a sliding block, and the sliding blocks are slidably connected with the inner surfaces of the limiting grooves on the same side.

[0017] Preferably, the bottom wall of the placing groove is provided with an embedded plate, the lower end middle part of the embedded plate is fixedly connected with a receiving column, the upper parts of the inner surfaces of the two ejection holes are slidably connected with a jacking column, the middle parts of the inner surfaces of the two ejection holes are fixedly connected with a receiving ring, the receiving rings on the same side are located below the jacking columns on the same side, the left sides and the right sides of the outer surfaces of the receiving columns are fixedly connected with a conveying cable, the two conveying cables are located on the inner surfaces of the pipe placing grooves on the same side, the bottom left side of the concave shell is fixedly connected with a detector, and the lower end of the detector is fixedly connected with the upper ends of the two conveying cables.

[0018] Preferably, the embedded plate upper end middle left and upper end middle right are provided with a top hole, and the top hole is vertically aligned with the ejection hole.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1、The driving assembly is arranged, in the use process, the position of the driving assembly is switched, the limiting and detection of the electric vehicle instrument are switched, the limiting assembly and the driving assembly are matched, the driving assembly assists the limiting assembly to detect the electric vehicle instrument by the change of air pressure, the overall detection operation is convenient and easy to operate, and the detection efficiency is improved.

[0021] 2、The limiting assembly is arranged, in the use process, the electric vehicle instrument is detected on the surface, the overall detection process is more stable and easy to operate, and the detection effect is improved. DETAILED DESCRIPTION

[0022] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 It is another view of the overall structure of the present application;

[0024] Figure 3 It is a schematic diagram of the opening position of the local structure of the present application;

[0025] Figure 4 It is a schematic diagram of the installation position of the limiting assembly of the present application;

[0026] Figure 5 It is a schematic diagram of the overall structure of the limiting assembly of the present application;

[0027] Figure 6 It is a schematic diagram of the installation position of the driving assembly of the present application;

[0028] Figure 7 It is a schematic diagram of the opening position of the top hole of the present application;

[0029] Figure 8 It is a schematic diagram of the overall structure of the switching assembly of the present application;

[0030] Figure 9 It is a schematic diagram of the local structure of the limiting assembly of the present application;

[0031] Figure 10 It is a schematic diagram of the Figure 6 It is an enlarged schematic diagram of the structure of A in the present application;

[0032] Figure 11 For the purpose of the present application Figure 9 The structure is enlarged and shown schematically.

[0033] In the figure: 1, bottom plate; 2, support rod; 3, drive assembly; 31, cavity box; 32, push plate; 33, handle; 34, switching assembly; 341, gas injection tube; 342, connecting plate; 343, adapter plate; 344, cross plate; 345, guide plate; 346, main hole; 347, auxiliary hole; 4, concave shell; 41, placement slot; 42, fixing hole; 43, placement hole; 44, ejection hole; 45, guide slot; 46, pipe placement slot; 47, air hole; 40, sliding slot; 5, limiting assembly; 51, C-shaped tube; 52, hollow slot plate; 53, rectangular block; 54, circular hole; 55, limiting slot; 56, extrusion rod; 57, sliding block; 571, embedded plate; 572, receiving column; 573, lifting column; 574, receiving ring; 575, conveying cable; 576, detector; 5711, material lifting hole; 5712, transmission plate. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0035] Embodiment one, as shown in Figure 1 and Figure 2 An electric vehicle instrument detection device, which comprises a bottom plate 1, the upper end of the bottom plate 1 is fixedly connected with four support rods 2 for support, the right end of the bottom plate 1 is fixedly installed with a drive assembly 3 through a rectangular plate, the upper ends of the four support rods 2 are jointly fixedly connected with a concave shell 4, and the bottom wall of the concave shell 4 is fixedly installed with a limiting assembly 5.

[0036] In the use process, first, the interface of the electric vehicle instrument to be detected is connected with the connecting part on the surface of the limiting assembly 5, then the drive assembly 3 is driven, so that the drive assembly 3 drives the structure inside the limiting assembly 5 to limit the electric vehicle instrument under the action of air pressure, and then the detection of the electric vehicle instrument is started, when the detection is completed, the drive assembly 3 is pulled back to the initial position, in this process, negative pressure is generated, so that the limiting assembly 5 cancels the limitation of the electric vehicle instrument, and then the position of the drive assembly 3 is switched, so that the drive assembly 3 drives the structure inside the limiting assembly 5 to lift the electric vehicle instrument through air pressure, so as to complete the detection of the electric vehicle, therefore, the drive assembly 3 controls the air pressure, so as to control the limitation of the limiting assembly 5 during the detection of the electric vehicle instrument and the ejection operation after the detection is completed, without the need for other electric power sources for control, the overall detection process is convenient and fast, and the overall device is convenient to place, and for sampling detection, without the need for larger detection instruments for detection.

[0037] Embodiment two, see Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 In this embodiment, the recessed shell 4 bottom wall middle right side is provided with a placement slot 41, the recessed shell 4 inner surface front side wall right part is provided with a fixing hole 42, the placement slot 41 bottom wall middle part is provided with a placement hole 43, the placement slot 41 bottom wall middle left side and right side are both provided with an ejection hole 44, the recessed shell 4 right end middle part lower side is provided with a sliding slot 40, the sliding slot 40 inner surface front side wall middle part and inner surface rear side wall middle part are both provided with a guide slot 45, the placement hole 43 inner surface front side upper part and inner surface rear side wall upper part are both provided with a pipe placement slot 46, the placement hole 43 inner surface front side wall lower part and inner surface rear side wall lower part are both provided with a ventilation hole 47 communicated with the recessed shell 4 outside.

[0038] Further, the placement hole 43, the ventilation hole 47 and the two ejection holes 44 are all communicated with the sliding slot 40 inner cavity.

[0039] Further, the driving assembly 3 includes a cavity box 31, the cavity box 31 lower end is fixedly connected with the search book bottom plate 1 right end through a rectangular plate, the cavity box 31 inner surface is slidably connected with a push plate 32, the push plate 32 right end middle part is fixedly connected with a handle 33, the cavity box 31 inner surface right side wall middle part is slidably installed with a switching assembly 34.

[0040] Further, the switching assembly 34 includes a gas injection pipe 341, the cavity box 31 inner surface right side wall middle part is provided with a sliding hole, the gas injection pipe 341 is slidably connected to the sliding hole inner surface, the gas injection pipe 341 outer surface rear side is fixedly connected with a connecting plate 342, the connecting plate 342 upper end left side and right side and lower end right side and right side are both fixedly connected with a link plate 343, the two link plates 343 located at the upper part are collectively fixedly connected with a horizontal plate 344, the two link plates 343 located at the lower side are both slidably connected to the rectangular plate upper side, the gas injection pipe 341 outer surface front side wall left side and right side and outer surface rear side wall left side and right side are both fixedly connected with a guide plate 345, the gas injection pipe 341 outer surface upper side left part is provided with two main holes 346, the gas injection pipe 341 outer surface front side and rear side are both provided with a secondary hole 347, the two secondary holes 347 are both located between the two main holes 346.

[0041] Further, the same side guide plates 345 are respectively slidably connected to the same side guide slots 45 inner surface, the gas injection pipe 341 outer surface left side is located in the sliding slot 40 inner cavity, the gas injection pipe 341 outer surface and the sliding slot 40 inner surface are mutually attached.

[0042] Further, the limiting assembly 5 comprises two C-shaped pipes 51, the air inlet ends of the two C-shaped pipes 51 are fixedly connected with the inner surfaces of the same side air holes 47, the air outlet ends of the two C-shaped pipes 51 are fixedly connected with the inner surfaces of the same side fixed holes 42, the right part of the front inner surface wall and the right side of the rear inner surface wall of the concave shell 4 are fixedly connected with air groove plates 52, the inner surfaces of the two air groove plates 52 are fixedly connected with rectangular blocks 53 on the sides close to each other, the ends of the two rectangular blocks 53 away from each other are linearly arrayed with a plurality of round holes 54, the inner surface left side wall and the inner surface right side wall of the plurality of round holes 54 are provided with limiting grooves 55 in the middle, the plurality of round holes 54 are slidably connected with extrusion rods 56, the outer surface left side and the outer surface right side of the plurality of extrusion rods 56 are fixedly connected with sliding blocks 57, and the plurality of sliding blocks 57 are slidably connected with the inner surfaces of the same side limiting grooves 55.

[0043] Further, the bottom wall of the placing groove 41 is provided with an embedded plate 571, the middle of the lower end of the embedded plate 571 is fixedly connected with a receiving column 572, the upper parts of the inner surfaces of the two ejection holes 44 are slidably connected with lifting columns 573, the middle parts of the inner surfaces of the two ejection holes 44 are fixedly connected with receiving rings 574, the same side receiving rings 574 are located below the same side lifting columns 573, the outer surface left side and the outer surface right side of the receiving column 572 are fixedly connected with conveying cables 575, and the two conveying cables 575 are located on the inner surfaces of the same side pipe placing grooves 46. The bottom left side of the concave shell 4 is fixedly connected with a detector 576, and the lower end of the detector 576 is fixedly connected with the upper ends of the two conveying cables 575.

[0044] Further, the middle left side and the middle right side of the upper end of the embedded plate 571 are provided with material ejection holes 5711, the same side material ejection holes 5711 are vertically aligned with the same side ejection holes 44, the upper middle of the embedded plate 571 is provided with a rectangular groove, and the bottom wall of the rectangular groove is fixedly installed with a transmission plate 5712, and the transmission plate 5712 is electrically connected with the receiving column 572.

[0045] In use, the electric vehicle instrument to be detected is placed on the bottom right side of the concave shell 4, so that the connector on the lower side of the electric vehicle instrument is inserted into the transmission plate 5712, and then the lower end of the electric vehicle instrument is attached to the bottom wall of the concave shell 4, the handle 33 is pushed, the handle 33 drives the push plate 32 fixedly connected therewith to slide to the left on the inner surface of the cavity box 31, and in the process of sliding of the push plate 32, the gas in the cavity box 31 enters the inner cavity of the gas injection pipe 341;

[0046] When the gas enters the injection pipe 341, because the initial positions of the two side auxiliary holes 347 correspond to the same side ventilation holes 47, the pushed gas enters the same side C-shaped pipe 51 through the same side ventilation holes 47, and then enters the inner cavity of the air slot plate 52 through the gas outlet end of the same side C-shaped pipe 51. Then the gas extrudes the inner cavities of the plurality of circular holes 54, and pushes the extrusion rods 56 in the plurality of circular holes 54 outward. The outer surface of the extrusion rod 56 is fixedly connected with the sliding block 57, which slides in the limiting groove 55 corresponding to the extrusion rod 56 during movement, thereby playing a limiting and guiding role.

[0047] When the plurality of extrusion rods 56 on both sides are pushed out of the plurality of circular holes 54, the plurality of extrusion rods 56 on both sides are attached to the surface of the electric vehicle instrument. Then, by starting the detection instrument 576, the detection instrument 576 transmits control instructions to the receiving column 572 through the two side conveying cables 575. Then, the electric vehicle instrument connector connected with the transmission plate 5712 receives the instructions transmitted by the detection instrument.

[0048] When the detection is completed, the handle 33 is pulled to the right, so that the push plate 32 is moved to the right, and the negative pressure is generated in the inner cavity of the cavity box 31, so that the plurality of extrusion rods 56 are sucked into the inner cavities of the plurality of circular holes 54 on the same side. The specific movement mode is opposite to the outward movement of the plurality of extrusion rods 56, so it will not be described in detail.

[0049] When the plurality of extrusion rods 56 are retracted inward and cancel the limiting of the electric vehicle instrument, the horizontal plate 344 is pulled to the right, so that the horizontal plate 344 drives the connecting plate 343 fixedly connected thereto to move to the right. When the connecting plate 343 moves to the right, the connecting plate 342 fixedly connected thereto also moves to the right. The injection pipe 341 is fixedly connected to the inner surface of the connecting plate 342, so that the rear part of the injection pipe 341 moves to the right in the inner cavity of the cavity box 31 by a distance, so that the right side of the connecting plate 342 and the left end of the cavity box 31 are attached to each other. During this process, the guide plate 345 fixedly connected to the outer surface of the injection pipe 341 slides in the same side guide groove 45, thereby playing a limiting and guiding role.

[0050] When the right end of the connecting plate 342 is attached to the left end of the cavity box 31, the auxiliary hole 347 is separated from the air hole 47 and no longer communicates with it, and the two main holes 346 respectively communicate with the ejection hole 44 on the same side. At this time, the push plate 32 is pushed to the right, so that the handle 33 moves to the left in the cavity of the cavity box 31. The compressed gas flows into the ejection hole 44 on the same side through the two main holes 346, and is compressed in the lifting column 573 on the same side through the receiving ring 574. The top hole 5711 on the same side is arranged in vertical alignment with the ejection hole 44 on the same side, so that the lifting column 573 on the same side is lifted upward from the top hole 5711 on the same side, and the electric vehicle instrument placed on the upper end of the embedded plate 571 is lifted. The interface of the electric vehicle instrument after being lifted is pulled away from the transmission plate 5712, and the detection of the electric vehicle instrument is completed. When the lifting column 573 needs to be restored to the original position, the handle 33 is pulled to the right, and the specific movement process is opposite to the process of lifting the lifting column 573 upward. Therefore, this scheme will not be described in detail.

[0051] The detection instrument 576 and the two transmission cables 575 are conventional designs in the prior art. In this scheme, only the detection instrument 576 needs to transmit the control signal required for detection to the receiving column 572 through the two transmission cables 575. The specific detection signal required can be adjusted according to actual detection requirements. Therefore, the specific installation mode and circuit connection mode of the detection instrument 576 and the two transmission cables 575 and the control method are conventional designs, and this scheme will not be described in detail.

[0052] The electrical connection between the receiving column 572 and the transmission plate 5712 is a conventional connection mode in the prior art. In this scheme, only the receiving column 572 needs to transmit the signal required for detection to the electric vehicle instrument connected thereto through the transmission plate 5712. Therefore, the specific connection mode can be adjusted according to actual production requirements, and this scheme will not be described in detail.

[0053] The electric vehicle instrument is a conventional setting in the prior art, and the connection mode of the connector at the lower end of the electric vehicle instrument and the transmission plate 5712 is a conventional clamping mode in the prior art. Therefore, this scheme will not be described in detail.

[0054] The basic principles and main features of the present application and the advantages of the present application are shown and described. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An electric vehicle instrument detection device comprising a base plate (1), characterized in that: Supporting rods (2) for supporting are fixedly connected to the four corners of the upper end of the bottom plate (1), a driving assembly (3) is fixedly installed on the right end of the bottom plate (1) through a rectangular plate, a concave shell (4) is commonly fixedly connected to the upper ends of the four supporting rods (2), and a limiting assembly (5) is fixedly installed on the bottom wall of the concave shell (4).

2. The electric vehicle instrument detection device of claim 1, wherein: A placing groove (41) is formed in the middle of the bottom wall of the concave shell (4), a fixing hole (42) is formed in the right part of the inner surface front sidewall of the concave shell (4), a placing hole (43) is formed in the middle of the bottom wall of the placing groove (41), ejection holes (44) are formed in the middle of the left side and the right side of the bottom wall of the placing groove (41), a sliding groove (40) is formed in the middle of the lower side of the right end of the concave shell (4), guide grooves (45) are formed in the middle of the inner surface front sidewall and the inner surface rear sidewall of the sliding groove (40), pipe placing grooves (46) are formed in the inner surface front sidewall upper part and the inner surface rear sidewall upper part of the placing hole (43), and air holes (47) that are in communication with the outside of the concave shell (4) are formed in the inner surface front sidewall lower part and the inner surface rear sidewall lower part of the placing hole (43).

3. The electric vehicle instrument detection device of claim 2, wherein: The placing hole (43), the air holes (47) and the two ejection holes (44) are in communication with the inner cavity of the sliding groove (40).

4. The electric vehicle instrument detection device of claim 3, wherein: The driving assembly (3) comprises a cavity box (31), the lower end of the cavity box (31) is fixedly connected to the right end of the bottom plate (1) through a rectangular plate, a push plate (32) is slidingly connected to the inner surface of the cavity box (31), a handle (33) is fixedly connected to the middle of the right end of the push plate (32), and a switching assembly (34) is slidingly installed on the middle of the right side wall of the inner surface of the cavity box (31).

5. The electric vehicle instrument detection device of claim 4, wherein: The switching assembly (34) comprises a gas injection pipe (341), a sliding hole is formed in the middle of the right side wall of the inner surface of the cavity box (31), the gas injection pipe (341) is slidingly connected to the inner surface of the sliding hole, a connecting plate (342) is fixedly connected to the rear side of the outer surface of the gas injection pipe (341), link plates (343) are fixedly connected to the left side and the right side of the upper end and the right side and the right side of the lower end of the connecting plate (342), a horizontal plate (344) is commonly fixedly connected to the upper ends of the two link plates (343) located at the upper part, the two link plates (343) located at the lower side are slidingly connected to the upper side of the rectangular plate, guide plates (345) are fixedly connected to the left side and the right side of the front sidewall and the left side and the right side of the rear sidewall of the outer surface of the gas injection pipe (341), two main holes (346) are formed in the left part of the upper side of the outer surface of the gas injection pipe (341), and auxiliary holes (347) are formed in the front side and the rear side of the outer surface of the gas injection pipe (341), and the two auxiliary holes (347) are located between the two main holes (346).

6. The electric vehicle instrument detection device of claim 5, wherein: The guide plates (345) on the same side are slidingly connected to the inner surfaces of the guide grooves (45) on the same side, the left side of the outer surface of the gas injection pipe (341) is located in the inner cavity of the sliding groove (40), and the outer surface of the gas injection pipe (341) and the inner surface of the sliding groove (40) are mutually attached.

7. The electric vehicle instrument detection device of claim 2, wherein: The limiting assembly (5) includes two C-shaped pipes (51), the air inlet ends of the two C-shaped pipes (51) are fixedly connected with the inner surfaces of the same side ventilation holes (47), the air outlet ends of the two C-shaped pipes (51) are fixedly connected with the inner surfaces of the same side fixing holes (42), the right part of the front inner surface wall and the right side of the rear inner surface wall of the concave shell (4) are fixedly connected with hollow groove plates (52), the inner surfaces of the two hollow groove plates (52) are fixedly connected with rectangular blocks (53) on the sides close to each other, the ends of the two rectangular blocks (53) away from each other are linearly arrayed with a plurality of circular holes (54), the left side walls and the right side walls of the inner surfaces of the plurality of circular holes (54) are provided with limiting grooves (55) in the middle parts, the plurality of circular holes (54) are slidably connected with extrusion rods (56), the left sides and the right sides of the outer surfaces of the plurality of extrusion rods (56) are fixedly connected with sliding blocks (57), and the sliding blocks (57) are slidably connected with the inner surfaces of the same side limiting grooves (55) respectively.

8. The electric vehicle instrument detection device of claim 3, wherein: The bottom wall of the placing groove (41) is provided with an embedded plate (571), the middle part of the lower end of the embedded plate (571) is fixedly connected with a receiving column (572), the upper parts of the inner surfaces of the two ejection holes (44) are slidably connected with lifting columns (573), the middle parts of the inner surfaces of the two ejection holes (44) are fixedly connected with receiving rings (574), the same side receiving rings (574) are located below the same side lifting columns (573), the left sides and the right sides of the outer surfaces of the receiving column (572) are fixedly connected with conveying cables (575), and the two conveying cables (575) are located in the inner surfaces of the same side pipe placing grooves (46).

9. The electric vehicle instrument detection device of claim 8, wherein: The middle left and middle right of the upper end of the embedded plate (571) are provided with ejection holes (5711), the same side ejection holes (5711) are vertically aligned with the same side ejection holes (44), the middle part of the upper end of the embedded plate (571) is provided with a rectangular groove, the bottom wall of the rectangular groove is fixedly installed with a transmission plate (5712), and the transmission plate (5712) is electrically connected with the receiving column (572).

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