Automobile low temperature resistance testing device

Abstract

The automobile low-temperature-resistant inspection device comprises a low-temperature inspection cabin, a cleaning table, a sputtering table, an inclined plate and a sputtering mechanism, and the sputtering mechanism comprises an electric sliding table, a first groove box, a rotating throwing disc, a first rotating motor, a second groove box, a rubber rotating cylinder, a second rotating motor, an electric push rod, a lifting plate and a snow melting agent solution. A first rotating motor can drive a rotating throwing disc to rotate, a snow-melting agent solution in a first tank is thrown to an outer plate of a to-be-tested vehicle, sputtering in the running process of the vehicle can be simulated through driving of an electric sliding table, meanwhile, when the to-be-tested vehicle is located above a sputtering table, a second rotating motor can drive a rubber rotating cylinder to rotate, and the to-be-tested vehicle is driven to rotate. When the rubber drum rotates, the snow-melting agent solution in the second tank is sputtered to the chassis of the vehicle, the snow-melting agent is sputtered and attached to the vehicle when the vehicle is simulated to run on the road surface, then the to-be-tested vehicle can be subjected to low-temperature-resistant verification in the state that the snow-melting agent is attached to the vehicle, verification data better conforming to the actual situation are obtained, and the verification effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle detection, in particular to a low-temperature resistance inspection device for automobiles. Background Art

[0002] During the automotive R&D and quality inspection process, testing of a vehicle's low-temperature resistance is crucial. Low-temperature environments can significantly affect many of a vehicle's components and performance. For example, low temperatures can reduce the elasticity of flexible materials such as rubber and cause them to crack, and increase the brittleness of metals and plastics, leading to cracks or ruptures. Different materials have different shrinkage coefficients, which can cause moving parts to seize or malfunction when the temperature changes greatly. At the same time, increased viscosity or solidification of lubricants can increase friction between moving parts, causing them to slow down or even stop working. It can also cause changes in the electrical parameters of components, affecting the product's electrical performance, and cause ice or frost to form, leading to structural damage or moisture. Especially in cold areas in winter, vehicles are exposed to low-temperature environments for long periods of time, posing severe challenges to their reliability and safety. Therefore, accurately simulating low-temperature environments and conducting comprehensive low-temperature resistance testing on vehicles are of great significance for ensuring the normal operation of vehicles in cold conditions, improving product quality and user experience. At present, the existing means of testing the low-temperature resistance of automobiles have certain limitations. Some traditional low-temperature tests only place the car in a low-temperature environment chamber and conduct a simple temperature test on the entire vehicle. They do not fully consider the impact of various complex factors on the car in actual use scenarios. During actual driving in winter, the snow-melting agent used on the road will cause corrosion and other damage to the vehicle chassis and outer panels. However, existing testing equipment is difficult to truly simulate the situation where the snow-melting agent splashes onto the chassis and outer panels when the vehicle is driving. Some use static spraying of snow-melting agent solution, which is far from the actual working conditions of dynamic splashing when the vehicle is driving. It is impossible to accurately evaluate the low-temperature resistance and corrosion resistance of the car in the actual use environment, resulting in deviations between the test results and the actual situation, and cannot provide accurate and effective data support for the optimized design and quality improvement of the car. Summary of the Invention

[0003] In view of this, the present invention proposes a low-temperature resistance testing device for automobiles, which can simulate the actual situation of a car driving on a road after snowmelt, and conduct low-temperature resistance tests based on the residual state of snowmelt, providing accurate and effective data support.

[0004] The technical solution of the present invention is achieved as follows: A low-temperature resistance inspection device for automobiles, comprising a low-temperature inspection chamber, a cleaning table, a sputtering table, an inclined plate, and a sputtering mechanism, wherein the cleaning table and the sputtering table are arranged in the low-temperature inspection chamber, and the inclined plate is arranged on both sides of the cleaning table and the sputtering table; the sputtering mechanism is arranged on the sputtering table, and comprises an electric slide, a first tank, a rotating disk, a first rotating motor, a second tank, a rubber drum, a second rotating motor, an electric push rod, a lifting plate, and a snow-melting agent solution; the electric slide is arranged on both sides of the sputtering table, and its mover faces away from the sputtering table and is connected to the side wall of the first tank; the top surface of the first tank is open, and the rotating disk is arranged at an angle In the first tank box, its higher side is arranged close to the sputtering table, the first rotating motor is arranged on the bottom surface of the first tank box, and its output shaft is connected to the center of the rotating disk, the second tank box is arranged on the top surface of the sputtering table, and its top surface is open, and the top surface of the sputtering table is provided with an opening connected to the second tank box, the rubber drum is located in the second tank box and below the opening, the second rotating motor is arranged on the outer wall of the second tank box, and its output shaft extends into the second tank box and is connected to the end of the rubber drum, the electric push rod is arranged on the bottom surface of the second tank box, and its output shaft is connected to the bottom surface of the lifting plate, and the snow melting agent solution is arranged in the first tank box and the second tank box.

[0005] Preferably, the sputtering mechanism further includes a sealing ring, and the sealing ring is arranged on the side wall of the lifting plate.

[0006] Preferably, the edge of the rotating disk is provided with a plurality of serrations.

[0007] Preferably, the sputtering mechanism further includes a linear guide rail and a baffle. The linear guide rail is arranged on the inner top surface of the sputtering table, and its mover is connected downward to one side of the top surface of the baffle. The other side of the baffle extends above the rubber drum.

[0008] Preferably, the baffle includes a hollow plate, an electromagnet, a metal plate and a spring. The top surface of one side of the hollow plate is connected to the bottom surface of the mover of the linear guide rail, and the other side extends to above the rubber drum. The hollow plate is open on both sides, the electromagnet is located in the middle of the hollow plate, one side of the metal plate extends into the hollow plate, and the spring connects the electromagnet and the metal plate.

[0009] Preferably, a slide bar is provided on the top surface of the metal plate, and a slide groove is provided on the inner top surface of the hollow plate. The slide groove extends to the open side of the hollow plate, and the slide bar is located in the slide groove.

[0010] Preferably, the sputtering mechanism further includes an L-shaped rod and a scraper, the L-shaped scraper is arranged on the top surface of the sputtering table, the linear guide rail passes through the L-shaped scraper, and the scraper is arranged on the L-shaped rod and is located below the moving path of the hollow plate and the metal plate.

[0011] Preferably, it further comprises a cleaning mechanism, which comprises a bracket and a high-pressure nozzle, wherein the bracket is arranged on the top surface of the cleaning table, and the high-pressure nozzle is arranged on the bracket and the top surface of the cleaning table.

[0012] Preferably, the cleaning mechanism further comprises a sponge block and a sponge drum, the sponge block is arranged on the top surface of the cleaning table, the sponge drum is arranged on the top surface of the cleaning table and is located on both sides of the sponge drum, and the bracket is located on one side of the sponge block.

[0013] Preferably, the cleaning mechanism further comprises a hot air blower, which is arranged on the top surface of the cleaning table and located between the sponge drums.

[0014] Compared with the prior art, the present invention has the following beneficial effects: ① After the vehicle to be tested enters the low-temperature inspection chamber, it can first be driven to the cleaning table for cleaning to remove impurities such as dust and grease, and then it can be driven to the sputtering table for sputtering of snow melting agent. The chassis and outer panels of the vehicle to be tested can be coated with snow melting agent and then subjected to low-temperature resistance verification. By simulating actual working conditions, more accurate and effective data support can be provided, thereby improving the effect of automobile low-temperature resistance testing; ② After the vehicle to be tested drives onto the sputtering table, the first rotary motor can drive the rotating disk to rotate, so that the snow-melting agent solution is thrown to the position below the vehicle's outer panel, while the second rotary motor can drive the rubber drum to rotate, so that the snow-melting agent solution is splashed onto the vehicle chassis, thereby simulating the actual working condition of the snow-melting agent on the road surface being splashed onto the vehicle chassis and outer panel during the driving process of the car, making the low-temperature resistance verification closer to the actual situation and improving the accuracy and authenticity of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic structural diagram of a low-temperature resistance testing device for an automobile according to the present invention; Figure 2 This is a schematic diagram of the connection structure between the sputtering table and the sputtering mechanism of an automobile low-temperature resistance testing device of the present invention; Figure 3 This is a structural schematic diagram of a rotating disk of a low-temperature resistance testing device for an automobile according to the present invention; Figure 4 This is a schematic diagram of the connection structure between the hollow plate and the metal plate of an automobile low-temperature resistance testing device of the present invention; In the figure, 1. Low-temperature inspection chamber; 2. Cleaning table; 3. Sputtering table; 4. Inclined plate; 5. Electric slide; 6. First trough box; 7. Rotating spinner; 8. First rotating motor; 9. Second trough box; 10. Rubber drum; 11. Second rotating motor; 12. Electric push rod; 13. Lifting plate; 14. Snow-melting agent solution; 15. Opening; 16. Sealing ring; 17. Sawtooth; 18. Linear guide; 19. Baffle; 20. Hollow plate; 21. Electromagnet; 22. Metal plate; 23. Spring; 24. Slide; 25. Slide groove; 26. L-shaped rod; 27. Scraper; 28. Bracket; 29. ​​High-pressure nozzle; 30. Sponge block; 31. Sponge drum; 32. Hot air blower. DETAILED DESCRIPTION

[0017] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0018] See also Figures 1 to 4 The present invention provides an automobile low-temperature resistance inspection device, which includes a low-temperature inspection chamber 1, a cleaning table 2, a sputtering table 3, an inclined plate 4 and a sputtering mechanism. The cleaning table 2 and the sputtering table 3 are arranged in the low-temperature inspection chamber 1, and the inclined plate 4 is arranged on both sides of the cleaning table 2 and the sputtering table 3; the sputtering mechanism is arranged on the sputtering table 3, which includes an electric slide 5, a first tank 6, a rotating disk 7, a first rotating motor 8, a second tank 9, a rubber drum 10, a second rotating motor 11, an electric push rod 12, a lifting plate 13 and a snow melting agent solution 14. The electric slide 5 is arranged on both sides of the sputtering table 3, and its mover faces away from the sputtering table 3 and is connected to the side wall of the first tank 6. The top surface of the first tank 6 is open, and the rotating disk 7 It is tilted and arranged in the first tank box 6, with its higher side arranged close to the sputtering table 3. The first rotating motor 8 is arranged on the inner bottom surface of the first tank box 6, and its output shaft is connected to the center of the rotating disk 7. The second tank box 9 is arranged on the inner top surface of the sputtering table 3, and its top surface is open. The top surface of the sputtering table 3 is provided with an opening 15 connected to the second tank box 9. The rubber drum 10 is located in the second tank box 9 and is located below the opening 15. The second rotating motor 11 is arranged on the outer wall of the second tank box 9, and its output shaft extends into the second tank box 9 and is connected to the end of the rubber drum 10. The electric push rod 12 is arranged on the inner bottom surface of the second tank box 9, and its output shaft is connected to the bottom surface of the lifting plate 13. The snow melting agent solution 14 is arranged in the first tank box 6 and the second tank box 9.

[0019] The present invention relates to a low-temperature resistance testing device for automobiles. The low-temperature testing chamber 1 can provide a low-temperature environment. The vehicle to be tested can undergo startup tests, driving tests, and steering tests in the low-temperature testing chamber 1. The impact of the low-temperature environment on the vehicle to be tested is determined by collecting data during the test process, so as to facilitate adjustments to the vehicle to be tested. When performing the low-temperature resistance test, the vehicle to be tested is driven into the low-temperature testing chamber 1 and first moved to the cleaning table 2 via the inclined plate 4. The exterior of the vehicle to be tested is cleaned by the cleaning table 2, and then the vehicle leaves the cleaning table 2 and moves to the sputtering table 3 via the inclined plate 4 again. The sputtering table 3 can sputter a deicing agent solution 14 onto the chassis and the lower part of the outer panel of the vehicle to be tested, so as to simulate the state in which the vehicle is easily splashed with deicing agent particles when driving on a road after snowmelt. The vehicle to be tested with the deicing agent adhered thereto can then leave the sputtering table 3 and undergo multiple low-temperature resistance tests in the low-temperature testing chamber 1. By simulating actual working conditions, the accuracy of the test results can be improved, so as to provide more accurate data support for automobile production and testing.

[0020] An opening 15 is provided on the top surface of the sputtering table 3. The width of the opening 15 is not too large. The tire of the vehicle to be tested can pass directly over the opening 15. When the vehicle to be tested moves to different positions on the sputtering table 3 and aligns with the opening 15, the snow-melting agent particles can be sputtered at different positions of the chassis. When the vehicle to be tested stops on the sputtering table 3, the second rotary motor 11 can be started. The second rotary motor 11 can drive the rubber drum 10 to rotate. The rubber drum 10 is located in the second tank 9, and its lower half is immersed in the snow-melting agent solution 14 in the second tank 9. During its rotation, the de-icing agent solution 14 can be splashed onto the chassis of the vehicle, simulating that the car is splashed with de-icing agent while moving on the road surface melted by the de-icing agent. As the rubber drum 10 continuously drives the de-icing agent to splash, the liquid level of the de-icing agent solution 14 in the second tank 9 will decrease. At this time, the electric push rod 12 can be started, and the electric push rod 12 can drive the lifting plate 13 to rise, so that the liquid level of the de-icing agent solution 14 in the second tank 9 is always kept to immerse the lower half of the rubber drum 10, so as to facilitate the de-icing agent splashing on the chassis of the vehicle to be tested.

[0021] When a vehicle is driving on a road after snowmelt, in addition to the chassis being splashed, the bottom edges of the outer panels on both sides of the vehicle are also easily adhered to the snowmelt agent. Therefore, in addition to splashing the snowmelt agent on the vehicle chassis, the present invention also splashes the lower positions of the outer panels on both sides of the vehicle to be tested. When the vehicle to be tested stops steadily on the sputtering platform 3, the first rotating motor 8 can be started. The first rotating motor 8 will drive the inclined rotating disk 7 to rotate. The lower end of the rotating disk 7 is immersed in the snowmelt agent solution 14 in the first tank 6. During the rotation process, the snowmelt agent solution 14 will be splashed to the lower edges of the outer panels of the vehicle to be tested. In order to simulate the splashing in actual driving conditions, and in actual conditions, the vehicle is often in a moving state, an electric slide 5 is set on the side wall of the first tank 6. The electric slide 5 can drive the first tank 6 to move along the driving direction of the vehicle to be tested, thereby simulating the splashing during driving and ensuring that the snow-melting agent adhesion of the vehicle to be tested is close to the actual state. After the snow-melting agent adhesion is completed, the vehicle to be tested can leave the splashing table 3 and undergo a low-temperature resistance test in the low-temperature environment of the low-temperature test chamber 1. The data during the inspection process is collected by data acquisition equipment such as sensors to facilitate the evaluation of vehicle changes.

[0022] Preferably, the sputtering mechanism further includes a sealing ring 16 , and the sealing ring 16 is provided on the side wall of the lifting plate 13 .

[0023] The sealing ring 16 can seal the gap between the lifting plate 13 and the inner wall of the second tank box 9 to prevent the deicing solution 14 from entering under the lifting plate 13, ensuring that the electric push rod 12 can drive the lifting plate 13 to rise to adjust the liquid level of the deicing solution 14.

[0024] Preferably, the edge of the rotating disk 7 is provided with a plurality of serrations 17 .

[0025] When the rotating disk 7 rotates, the deicing agent solution 14 is thrown out from the edge due to centrifugal force, and the serrations 17 set on the edge will cut the liquid column, breaking it into smaller droplets or liquid beams, simulating the splashing particles formed when the deicing agent is cut by the tire pattern when the wheels roll over the road surface.

[0026] Preferably, the sputtering mechanism further includes a linear guide 18 and a baffle 19 . The linear guide 18 is arranged on the top surface of the sputtering table 3 , and its mover is connected downward to one side of the top surface of the baffle 19 . The other side of the baffle 19 extends above the rubber drum 10 .

[0027] In actual situations, when the vehicle is driving, the snow-melting agent splashed on the chassis is not continuous, and there may be multiple areas where the snow-melting agent adheres. Therefore, the present invention is provided with a movable baffle 19 on the bottom surface of the sputtering table 3, and the linear guide 18 on one side of the opening 15 can drive the baffle 19 to move above the rubber drum 10 to achieve shielding of a part of the opening 15, so that part of the snow-melting agent solution 14 thrown out by the rubber drum 10 can be blocked by the baffle 19, thereby splashing a discontinuous area of ​​the snow-melting agent solution 14 on the chassis.

[0028] Preferably, the baffle 19 includes a hollow plate 20, an electromagnet 21, a metal plate 22 and a spring 23. The top surface of one side of the hollow plate 20 is connected to the bottom surface of the mover of the linear guide 18, and the other side extends to above the rubber drum 10. The hollow plate 20 is open on both sides, the electromagnet 21 is located in the middle of the hollow plate 20, and one side of the metal plate 22 extends into the hollow plate 20. The spring 23 connects the electromagnet 21 and the metal plate 22.

[0029] The width of the baffle 19 can be adjusted to achieve the adjustment of the blocked area, wherein the baffle 19 main body includes a hollow plate 20 with open sides. The electromagnet 21 is arranged in the middle of the hollow plate 20 to achieve the separation of the internal area. Metal plates 22 are arranged on both sides of the hollow plate 20. One side of the metal plate 22 extends into the hollow plate 20. The spring 23 connects the metal plate 22 and the electromagnet 21. By controlling the current of the electromagnet 21, the magnetic force of the electromagnet 21 on the metal plate 22 can be adjusted. Under the action of magnetic force and elastic force, the length of the metal plate 22 extending outside the hollow plate 20 is adjusted. Finally, the sum of the width of the metal plate 22 at the outside and the width of the hollow plate 20 itself constitutes the width of the entire baffle 19, so that areas of different sizes can be blocked to simulate different adhesion areas of the snow-melting agent.

[0030] Preferably, a slide bar 24 is provided on the top surface of the metal plate 22 , and a slide groove 25 is provided on the inner top surface of the hollow plate 20 . The slide groove 25 extends to the open side of the hollow plate 20 , and the slide bar 24 is located in the slide groove 25 .

[0031] In order to ensure that the metal plate 22 can move stably and avoid irregular deformation of the spring 23, a slide groove 25 is set on the top surface of the hollow plate 20. The slide bar 24 on the top of the metal plate 22 can move along the slide groove 25. The slide groove 25 limits the slide bar 24 to ensure that the metal plate 22 does not deviate when moving.

[0032] Preferably, the sputtering mechanism also includes an L-shaped rod 26 and a scraper 27, the L-shaped scraper is arranged on the top surface of the sputtering table 3, the linear guide 18 passes through the L-shaped scraper, and the scraper 27 is arranged on the L-shaped rod 26 and is located below the moving path of the hollow plate 20 and the metal plate 22.

[0033] During the process of shielding the de-icing solution 14, the metal plate 22 and the hollow plate 20 will have the de-icing solution 14 adhered to their bottom surfaces. The linear guide rail 18 can drive the hollow plate 20 and the metal plate 22 to move toward the L-shaped rod 26. When the bottom surfaces of the metal plate 22 and the hollow plate 20 come into contact with the scraper 27 on the L-shaped rod 26, the scraper 27 can scrape off the de-icing solution 14 adhered to the bottom surfaces of the hollow plate 20 and the metal plate 22, so that the de-icing solution 14 returns to the second trough box 9, thereby avoiding waste of resources.

[0034] Preferably, a cleaning mechanism is further included, which includes a bracket 28 and a high-pressure nozzle 29 . The bracket 28 is arranged on the top surface of the cleaning table 2 , and the high-pressure nozzle 29 is arranged on the bracket 28 and the top surface of the cleaning table 2 .

[0035] Before the snow-melting agent is sprayed, the vehicle to be tested needs to be cleaned. After the vehicle to be tested is moved to the cleaning platform 2, the high-pressure nozzle 29 can be turned on. The high-pressure nozzle 29 on the bracket 28 can clean the outer panel of the vehicle, while the high-pressure nozzle 29 on the bottom can clean the chassis, ensuring that the surface of the vehicle to be tested is clean before the snow-melting agent solution 14 is sprayed.

[0036] Preferably, the cleaning mechanism also includes a sponge block 30 and a sponge drum 31, the sponge block 30 is arranged on the top surface of the cleaning table 2, the sponge drum 31 is arranged on the top surface of the cleaning table 2, and is located on both sides of the sponge drum 31, the bracket 28 is located on one side of the sponge block 30, and the cleaning mechanism also includes a hot air blower 32, the hot air blower 32 is arranged on the top surface of the cleaning table 2, and is located between the sponge drums 31.

[0037] After cleaning is completed, the vehicle to be tested will move on the cleaning table 2 and pass over the sponge block 30 and between the sponge drum 31. The sponge block 30 can absorb moisture from the bottom of the chassis and further clean it, while the sponge drum 31 can rotate under the drive of the vehicle to be tested to absorb water and further clean the vehicle's outer panel. At the same time, the hot air blower 32 can be started to blow hot air to dry the vehicle to remove moisture, ensuring that the snow-melting agent solution 14 can be stably adhered when the vehicle to be tested moves to the sputtering table 3.

[0038] The above description is only a preferred embodiment of the present invention and is 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 scope of protection of the present invention.

Claims

1. A low temperature resistance test device for automobiles, characterized in that: It includes a low-temperature inspection chamber, a cleaning table, a sputtering table, an inclined plate and a sputtering mechanism. The cleaning table and the sputtering table are arranged in the low-temperature inspection chamber, and the inclined plate is arranged on both sides of the cleaning table and the sputtering table; the sputtering mechanism is arranged on the sputtering table, which includes an electric slide, a first tank box, a rotating disk, a first rotating motor, a second tank box, a rubber drum, a second rotating motor, an electric push rod, a lifting plate and a snow melting agent solution. The electric slide is arranged on both sides of the sputtering table, and its mover faces away from the sputtering table and is connected to the side wall of the first tank box. The top surface of the first tank box is open, and the rotating disk is tilted in the first tank box. , its higher side is arranged close to the sputtering table, the first rotating motor is arranged on the bottom surface of the first tank box, and its output shaft is connected to the center of the rotating disk, the second tank box is arranged on the top surface of the sputtering table, and its top surface is open, and the top surface of the sputtering table is provided with an opening connected to the second tank box, the rubber drum is located in the second tank box and below the opening, the second rotating motor is arranged on the outer wall of the second tank box, and its output shaft extends into the second tank box and is connected to the end of the rubber drum, the electric push rod is arranged on the bottom surface of the second tank box, and its output shaft is connected to the bottom surface of the lifting plate, and the snow melting agent solution is arranged in the first tank box and the second tank box.

2. The automobile low temperature resistance testing device according to claim 1, characterized in that: The sputtering mechanism further includes a sealing ring, which is arranged on the side wall of the lifting plate.

3. The automobile low temperature resistance testing device according to claim 1, characterized in that: The edge of the rotating disk is provided with a plurality of serrations.

4. The automobile low temperature resistance testing device according to claim 1, characterized in that: The sputtering mechanism further includes a linear guide rail and a baffle. The linear guide rail is arranged on the inner top surface of the sputtering table, and its mover is downwardly connected to one side of the top surface of the baffle. The other side of the baffle extends above the rubber drum.

5. The automobile low temperature resistance testing device according to claim 4, characterized in that: The baffle includes a hollow plate, an electromagnet, a metal plate and a spring. The top surface of one side of the hollow plate is connected to the bottom surface of the mover of the linear guide rail, and the other side extends to above the rubber drum. The two sides of the hollow plate are open. The electromagnet is located in the middle of the hollow plate. One side of the metal plate extends into the hollow plate. The spring connects the electromagnet and the metal plate.

6. The automobile low temperature resistance testing device according to claim 5, characterized in that: The top surface of the metal plate is provided with a slide bar, the inner top surface of the hollow plate is provided with a slide groove, the slide groove extends to the open side of the hollow plate, and the slide bar is located in the slide groove.

7. The automobile low temperature resistance testing device according to claim 5, characterized in that: The sputtering mechanism also includes an L-shaped rod and a scraper. The L-shaped scraper is arranged on the top surface of the sputtering table. The linear guide passes through the L-shaped scraper. The scraper is arranged on the L-shaped rod and is located below the moving path of the hollow plate and the metal plate.

8. The automobile low temperature resistance testing device according to claim 1, characterized in that: It also includes a cleaning mechanism, which includes a bracket and a high-pressure nozzle. The bracket is arranged on the top surface of the cleaning table, and the high-pressure nozzle is arranged on the bracket and the top surface of the cleaning table.

9. The automobile low temperature resistance testing device according to claim 8, characterized in that: The cleaning mechanism also includes a sponge block and a sponge drum. The sponge block is arranged on the top surface of the cleaning table. The sponge drum is arranged on the top surface of the cleaning table and is located on both sides of the sponge drum. The bracket is located on one side of the sponge block.

10. The automobile low temperature resistance testing device according to claim 8, characterized in that: The cleaning mechanism further comprises a hot air blower, which is arranged on the top surface of the cleaning table and located between the sponge drums.

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