Impact resistance test device for automobile polycarbonate sheet material

Abstract

The invention relates to the technical field of anti-impact tests, in particular to an anti-impact test device for an automobile polycarbonate sheet. The testing device comprises a testing device body, a clamp assembly and an adapting piece, when the size of a tested plate is relatively large, the adapting piece can be compressed and used for increasing the distance between the tested plate and a ball falling mechanism, and when the size of the tested plate is small, the adapting piece can be closer to the ball falling mechanism. According to the invention, when the falling ball body collides with the surface of a large plate, the buffer amplitude generated by the adapting piece to the large plate is small, and in the small plate test process, the pressure borne by the adapting piece is small, the resilience force is large, and when the falling ball body collides with the surface of the small plate, the buffer amplitude of the adapting piece to the small plate is larger than that of the large plate; therefore, the impact force borne by the large plate is larger than that borne by the small plate on the whole, and the situation that different plates are excessively detected is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of anti-impact testing, in particular to an anti-impact testing device for automobile polycarbonate sheets. Background Art

[0002] The strength test of polycarbonate sheets is a process of evaluating the various strength properties of polycarbonate sheets through a series of professional equipment and methods. It usually includes the use of universal material testing machines, impact testing machines and other devices to test the sheets in tension, compression, bending and impact. In order to simulate the impact conditions that the sheet may encounter during use, impact testing before leaving the factory has become a necessary quality control measure. At present, most manufacturers focus on qualitative judgment of the sheet's ability to withstand impact in this link. That is, when conducting impact tests, detailed data records are usually not required, but the quality of the polycarbonate sheet is preliminarily evaluated by directly observing whether it can withstand specific impacts. In order to make up for the shortcomings of a single fixed force impact test and improve the quality and comprehensiveness of the test, multiple impact tests with different forces are usually used. In terms of the way to adjust the impact force, it is more common to change the falling height of the impact ball or replace the mass of the ball. At present, the impact ball is often controlled by electromagnetic adsorption. The electromagnetic adsorption device is fixedly installed at a specific height. Once the ball falling height needs to be adjusted to change the impact force, the entire adsorption device must be disassembled and reinstalled because the electromagnetic adsorption device is fixed. This process not only reduces production efficiency, but also frequent operations will cause adverse consequences such as reduced accuracy of the electromagnetic adsorption device and loose connection parts. Considering that polycarbonate sheets of different sizes can withstand different impact forces, in order to prevent over-testing, in theory, different masses of spheres should be selected according to the size of the sheet. However, the specifications of sheets from the same batch are different due to different subsequent application scenarios. If the mass of the spheres is replaced one by one according to the specific size of the sheet, it is necessary to replace the entire sphere device or add additional counterweight components, which is extremely inconvenient and lacks flexibility. In view of this, there is an urgent need for an anti-impact test device for automobile polycarbonate sheets to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide an impact resistance test device for automobile polycarbonate sheets to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention aims to provide an impact resistance test device for automobile polycarbonate sheets, including a test device body, the test device body including a base, a support mechanism for horizontally placing the test sheet is installed on the top of the base, a vertical rod is fixedly installed on the top of the other side of the base, a ball drop mechanism is installed on the upper end of the vertical rod, and the ball drop mechanism is located at the upper end of the support mechanism. A bottom groove is opened in the middle of the base, and the support mechanism includes a clamp assembly and an adapter, and the adapter is located below the clamp assembly. When the size of the test sheet is relatively large, the adapter can be compressed to drive the clamp assembly to slide down, so as to increase the distance between the test sheet and the ball drop mechanism. When the size of the test sheet is small, the test sheet is placed on the surface of the clamp assembly and can be closer to the ball drop mechanism.

[0005] As a further improvement of the present technical solution, the ball dropping mechanism includes a support platform which is clamped and fixed to the upper end surface of the vertical pole, an electromagnetic adsorption component is fixedly installed on the top of the support platform, the other end of the electromagnetic adsorption component passes through the support platform and is located at the bottom of the support platform, the bottom end of the electromagnetic adsorption component is internally adsorbed and connected with a falling ball body, and a control box is fixedly installed on the side end of the support platform.

[0006] As a further improvement of the present technical solution, the fixture assembly includes a supporting platform, which is fixedly mounted on the top of the base. A protective cavity is formed inside the supporting platform. An inner platform is slidably provided inside the protective cavity. The test plate is placed on the surface of the inner platform. A ball dropping hole is provided in the middle of the inner platform. A clamping cover for clamping the test plate is installed on the top surface of the inner platform.

[0007] As a further improvement of the present technical solution, the clamping cover body includes four corner rods fixedly installed on the top of the four corners of the inner platform, and the surfaces of the four corner rods are threaded structures. A hollow pressure plate is provided on the surface of the inner platform, and the four ends of the hollow pressure plate are sleeved on the surfaces of the four corner rods. The hollow pressure plate and the four corner rods are threadedly fixed by multiple fixing rings.

[0008] As a further improvement of the present technical solution, the adaptor includes two pads, which are symmetrically fixed inside the protective cavity, and two fixing rods are fixedly installed on the surfaces of the two pads. The four fixing rods are all hollow structures, and movable rods are movably installed inside the four fixed rods. The four movable rods are fixedly installed on the bottom of the inner platform on one side away from the pads, and four elastic parts are fixedly installed between the inner platform and the two pads, and the four elastic parts are respectively sleeved on the surfaces of the four movable rods.

[0009] As a further improvement of the technical solution, an extension ring is fixedly installed in the ball-dropping hole of the inner platform, the top of the extension ring is flush with the upper surface of the inner platform, and the bottom of the extension ring extends out of the lower surface of the inner platform.

[0010] As a further improvement of the present technical solution, two side grooves are provided on the inner walls on both sides of the protective cavity, and extension plates are slidably provided inside the four side grooves. Two side clamping plates are respectively clamped and installed at both ends of the inner platform, and the four side clamping plates are respectively fixedly connected to one end of the four extension plates away from the side grooves.

[0011] As a further improvement of the technical solution, a gasket is laid on one end of the hollow pressure plate close to the inner platform, and the gasket is made of soft material.

[0012] As a further improvement of the technical solution, an indicator mark is provided in the middle of the surface of the inner platform, and the indicator mark is used to indicate the placement position of the plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the anti-impact test device for automobile polycarbonate sheets, a suitable hollow pressing plate is selected to clamp the sheet according to the size of the sheet to be tested. During the pressing process of the sheet, the adaptor will generate corresponding compression according to the mass of the sheet. When a large sheet is tested, the compression of the adaptor can cause the inner platform to slide downward, thereby increasing the distance between the sheet to be tested and the falling ball body, thereby achieving the purpose of increasing the impact force. When testing a small sheet, since the weight of the small sheet is lower than that of the large sheet, the sliding amplitude of the inner platform will be reduced. Therefore, compared with the large sheet, the distance between the small sheet and the falling ball body is closer, and the impact force is relatively reduced. At the same time, the adaptor has the characteristic of being movable and adjustable. When the plate is pressed down on the top of the adaptor, the adaptor still retains a certain elasticity. When conducting a large plate test, the adaptor is subjected to greater pressure and its rebound force is relatively small. Therefore, when the falling ball body hits the surface of the large plate, the buffering amplitude of the adaptor on the large plate is also smaller. During the test of the small plate, the adaptor is subjected to less pressure and has a greater rebound force. Through rebound, the falling ball body can fall on the surface of the test plate multiple times and test the plate multiple times. When the falling ball body hits the surface of the small plate, the adaptor has a greater buffering amplitude for the small plate than that for the large plate. This results in the impact force borne by the large plate being generally greater than that borne by the small plate. In this way, excessive testing of different plates is effectively reduced when the falling ball position and falling ball mass remain unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the exploded structure of the clamping cover body of the present invention; Figure 4 It is a schematic diagram of the internal structure of the protective cavity of the present invention; Figure 5 It is a schematic diagram of the placement structure of a large-size test board of the present invention; Figure 6 It is a schematic diagram of the placement structure of the small-size test board of the present invention; Figure 7 For the present invention Figure 5 A schematic diagram of the structure at A; Figure 8 It is a schematic diagram of the internal structure of the support platform of the present invention; Fig. 9 It is a schematic diagram of the structure of the adapter of the present invention.

[0015] The meaning of each number in the figure is: 1. Test device body; 11. Ball drop mechanism; 12. Support mechanism; 13. Base; 14. Vertical pole; 131. Bottom groove; 21. Electromagnetic adsorption part; 22. Support platform; 23. Control box; 24. Falling ball body; 31. Clamp assembly; 32. Clamping cover; 33. Adaptor; 311, support platform; 312, protective cavity; 313, inner platform; 314, extension ring; 321, angle bar; 322, fixing ring; 323, hollow pressing plate; 331, pad; 332, fixed rod; 333, movable rod; 334, elastic member; 4. side splint; 41. side groove; 42. extension plate; 5. Gasket; 6. Signpost. DETAILED DESCRIPTION

[0016] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] For examples, see Figure 1-Figure 4As shown, the purpose of this embodiment is to provide an impact test device for automobile polycarbonate sheet, including a test device body 1, the test device body 1 includes a base 13, a support mechanism 12 for horizontally placing the test plate is installed on the top of the base 13, a vertical rod 14 is fixedly installed on the top of the other side of the base 13, a ball drop mechanism 11 is installed on the upper end of the vertical rod 14, and the ball drop mechanism 11 is located just above the support mechanism 12, and a bottom groove 131 is opened in the middle of the base 13; The supporting mechanism 12 includes a clamp assembly 31 and an adaptor 33. The adaptor 33 is located below the clamp assembly 31. When the test plate is relatively large in size, the adaptor 33 can be compressed to drive the clamp assembly 31 to slide down, so as to increase the distance between the test plate and the ball drop mechanism 11. When the test plate is small in size, the test plate is placed on the surface of the clamp assembly 31 and can be closer to the ball drop mechanism 11.

[0018] First, the specific structure of the ball dropping mechanism 11 is disclosed. The ball dropping mechanism 11 includes a support platform 22 which is clamped and fixed to the upper end surface of the vertical rod 14. An electromagnetic adsorption component 21 is fixedly installed on the top of the support platform 22. The other end of the electromagnetic adsorption component 21 passes through the support platform 22 and is located at the bottom of the support platform 22. A ball dropping body 24 is adsorbed and connected inside the bottom end of the electromagnetic adsorption component 21, and a control box 23 is fixedly installed on the side end of the support platform 22.

[0019] See also Figure 2 As shown, one end of the electromagnetic adsorption component 21 fixed on the top of the support platform 22 extends through the support platform 22 to the bottom, and the ball falling body 24 is connected to the inside of the bottom end of the electromagnetic adsorption component 21 through electromagnetic adsorption. When the control box 23 located at the side end of the support platform 22 sends an instruction to control the electromagnetic adsorption component 21 to change the electromagnetic state, the ball falling body 24 will fall down due to the loss of adsorption force, thereby realizing the ball falling operation.

[0020] Among them, the control principle of the control box 23 on the electromagnetic adsorption component 21 is mainly based on the electromagnetic principle. The control box 23 contains a circuit system and a control unit. When the signal triggering the falling ball operation is input into the control box 23, the control unit inside it will operate the circuit system according to the preset program and parameters. Under the action of the circuit system, the current or voltage of the electromagnetic adsorption component 21 will be changed. The electromagnetic force of the electromagnetic adsorption component 21 is the magnetic field generated by the current to realize the function of adsorbing the falling ball body 24. Once the electrical parameters change, the internal magnetic field will change. When the magnetic field strength is reduced to a certain level and can no longer provide sufficient adsorption force, the falling ball body 24 will fall due to gravity. This control method can accurately control the timing of the falling ball by precisely adjusting the electrical parameters, thereby meeting the requirements of the impact test experiment for the triggering accuracy and execution consistency of the falling ball action.

[0021] When conducting an impact resistance test on a plate, it is necessary to first place the plate through a clamp assembly 31. The specific structure of the clamp assembly 31 is disclosed below. The clamp assembly 31 includes a support platform 311, and the support platform 311 is fixedly mounted on the top of the base 13. A protective cavity 312 is formed inside the support platform 311, and an inner platform 313 is slidably provided inside the protective cavity 312. The test plate is placed on the surface of the inner platform 313, and a ball drop hole is provided in the middle of the inner platform 313. A clamping cover 32 for clamping the test plate is installed on the top surface of the inner platform 313.

[0022] Then, the specific structure of the clamping cover body 32 is disclosed. The clamping cover body 32 includes four corner rods 321 fixedly installed on the top of the four corners of the inner platform 313. The surfaces of the four corner rods 321 are all threaded structures. The surface of the inner platform 313 is provided with a hollow pressure plate 323. The four ends of the hollow pressure plate 323 are sleeved on the surfaces of the four corner rods 321. The hollow pressure plate 323 and the four corner rods 321 are threadedly fixed by multiple fixing rings 322.

[0023] Combination Figure 3 and Figure 5 It can be seen that when placing the plate, the plate to be tested is placed stably on the surface of the inner platform 313, and then, a suitable hollow pressing plate 323 is selected according to the size of the test plate (the inner diameter of the hollow pressing plate 323 needs to be smaller than the size of the test plate). After the hollow pressing plate 323 is placed in place, it is fixed by the fixing ring 322 to ensure that the plate to be tested can be firmly clamped between the inner platform 313 and the hollow pressing plate 323; Among them, the hollow pressing plate 323 is preferably made of a material with a lighter weight and a higher hardness (such as engineering plastics). In this way, even if different hollow pressing plates 323 are replaced accordingly due to different sizes of plates, it will not have a significant impact on the subsequent test process and results, thereby ensuring the stability and accuracy of the entire test process.

[0024] Finally, the specific structure of the adaptor 33 is disclosed. The adaptor 33 includes two pads 331, and the two pads 331 are symmetrically fixedly installed inside the protective cavity 312. Two fixed rods 332 are fixedly installed on the surfaces of the two pads 331. The four fixed rods 332 are all hollow structures. Movable rods 333 are movably installed inside the four fixed rods 332. The four movable rods 333 are fixedly installed on the bottom of the inner platform 313 on one side away from the pads 331. Four elastic members 334 are fixedly installed between the inner platform 313 and the two pads 331. The four elastic members 334 are respectively sleeved on the surfaces of the four movable rods 333.

[0025] See also Figure 4 Combined with Fig. 9As shown, a pad 331 is installed at the bottom of the inner cavity of the protective cavity 312, and a fixed rod 332, a movable rod 333 and an elastic member 334 are connected between the pad 331 and the inner platform 313. When a plate is placed on the surface of the inner platform 313, the elastic member 334 will be adaptively compressed according to the condition of the plate, and the movable rod 333 will slide into the fixed rod 332 under the drive of the inner platform 313; see Figure 5 Combined with Figure 6 As shown, when testing a large plate, due to its heavy mass, after pressing down on the surface of the inner platform 313, the inner platform 313 will slide down to a greater extent. Since the inner platform 313 slides down and the position of the falling ball body 24 remains fixed, the distance between the large plate and the falling ball body 24 will be farther during the large plate test, thereby increasing the impact force of the falling ball on the large plate. The small plate is relatively light in mass, and after being placed, the inner platform 313 slides down less, and the distance between it and the falling ball body 24 is closer than that of the large plate. Therefore, the impact force of the falling ball on the small plate is relatively reduced, so that different impact force test effects can be achieved according to the size of the plate. When conducting a plate test, the large plate has a larger mass, and when placed on the inner platform 313, it will produce a stronger compression on the elastic member 334. When the falling ball body 24 hits the surface of the large plate, since the elastic member 334 has been greatly compressed, the buffering effect it can provide is relatively small, so that the falling ball body 24 can act on the large plate with a greater impact force. The small plate is lighter in mass and has a weaker compression strength on the elastic member 334 than the large plate. When the falling ball body 24 hits the surface of the small plate, the remaining buffering space of the elastic member 334 is larger, the buffering effect is more significant, and the impact force will be relatively reduced. In this way, by taking advantage of the different compression degrees of the elastic member 334 due to the size of the plate, the same falling ball body 24 can adjust the impact force on plates of different sizes, ensuring that large plates are subjected to a larger impact force and small plates are subjected to a smaller impact force, effectively avoiding the situation where different plates are over-tested due to fixed falling ball conditions, so that the test results are more in line with actual needs and more targeted.

[0026] Whether it is a large plate or a small plate, when placed on the surface of the inner platform 313, it will exert a downward pressure on the inner platform 313 due to its own gravity. In this way, the plate can be tested inside the space defined by the protective cavity 312. This design effectively limits the scope of action of the falling ball. After multiple bounce tests, the falling ball can also reduce the possibility of the ball accidentally falling to the outside of the supporting platform 311, thereby significantly improving the safety of the entire detection process.

[0027] in, Figure 5 The straight arrows and Figure 6 The dotted arrows in the figure respectively indicate the resilience of the adaptor 33 when the large plate and the small plate are placed on the surface of the inner platform 313. Figure 5 The straight arrow in the figure is shorter, indicating that the rebound amplitude is smaller. Figure 6 The dotted arrow in the figure is longer, indicating that the rebound amplitude is relatively large.

[0028] Since during the ball drop test, the plate may fail the test and be damaged due to the impact of the falling ball, an extension ring 314 is fixedly installed in the ball drop hole of the inner platform 313. The top of the extension ring 314 is flush with the upper surface of the inner platform 313, and the bottom of the extension ring 314 extends out of the lower surface of the inner platform 313.

[0029] The improvement is: according to Figure 5 It can be seen that the top of the extension ring 314 is flush with the upper surface of the inner platform 313, and its bottom extends out of the lower surface of the inner platform 313. If the plate fails the test and is damaged, the falling ball body 24 or plate waste will fall from the middle of the inner platform 313. The extension ring 314 can change its falling trajectory, effectively reducing the situation where the ball or plate waste falls directly on the gasket 5, thereby ensuring that the adapter 33 can operate normally.

[0030] Since the inner platform 313 needs to be able to slide vertically stably and accurately during the experiment to ensure the stability of the plate placement and the undisturbed test situation, two side grooves 41 are provided on the inner walls on both sides of the protective cavity 312, and extension plates 42 are slidably provided inside the four side grooves 41. Two side clamping plates 4 are respectively clamped and installed at both ends of the inner platform 313, and the four side clamping plates 4 are respectively fixedly connected to the ends of the four extension plates 42 away from the side grooves 41.

[0031] The improvements are: See Figure 5 Combined with Figure 7 As shown, the cooperation between the side groove 41 and the extension plate 42 can guide and limit the sliding direction of the inner platform 313, effectively restricting the inner platform 313 to slide only in the vertical direction, thereby ensuring that when placing the plate and conducting the plate test, the accuracy and reliability of the experiment will not be affected by the instability or offset of the inner platform 313.

[0032] When the plate is tested, the hollow pressing plate 323 and the inner platform 313 will clamp the plate, and the hollow pressing plate 323 itself is made of relatively hard material, and direct contact with the plate can easily cause damage to the surface of the plate. Therefore, a gasket 5 is laid on one end of the hollow pressing plate 323 close to the inner platform 313, and the gasket 5 is made of a soft material.

[0033] The improvement lies in that a gasket 5 made of soft material is laid on one end of the hollow pressure plate 323 close to the inner platform 313. The gasket 5 can be made of rubber or silicone material, which has good flexibility and elasticity and protects the surface of the plate from additional damage, thereby ensuring that the test proceeds smoothly and obtains reliable results.

[0034] When conducting a plate test, in order to ensure the accuracy of the test results, the plate needs to be placed at the center of the inner platform 313 so that the test area of ​​the plate can be located at the lower end of the falling ball body 24. Therefore, an indicator mark 6 is opened in the middle of the surface of the inner platform 313, and the indicator mark 6 is used to indicate the placement position of the plate.

[0035] The improvements are: See Figure 8 As shown, an indicator mark 6 is provided on the surface of the inner platform 313, the purpose of which is to provide an intuitive and clear reference for the operator, to assist the operator in quickly and accurately positioning the plate to the ideal center position, thereby effectively reducing the test error caused by inaccurate placement, and ensuring that the test results have higher credibility and validity.

[0036] In summary, the working principle of this solution is as follows: first, the plate to be tested is placed stably on the surface of the inner platform 313, and then, the suitable hollow pressing plate 323 is selected according to the size of the test plate. After the hollow pressing plate 323 is placed in place, it is fixed by using the fixing ring 322 to ensure that the plate to be tested can be firmly clamped between the inner platform 313 and the hollow pressing plate 323. When the plate is placed on the surface of the inner platform 313, the elastic member 334 will be adaptively compressed according to the condition of the plate, and at the same time, the movable rod 333 will slide toward the inside of the fixed rod 332 under the drive of the inner platform 313, and the plate will be tested. When testing a large plate, due to its heavy mass, after pressing down on the surface of the inner platform 313, the inner platform 313 will slide down to a greater extent. Since the inner platform 313 slides down and the position of the falling ball body 24 remains fixed, the distance between the large plate and the falling ball body 24 will be greater during the large plate test, thereby increasing the impact force of the falling ball on the large plate. The small plate is relatively light in mass, and after being placed, the inner platform 313 slides down less, and the distance between it and the falling ball body 24 is closer than that of the large plate. Therefore, the impact force of the falling ball on the small plate is relatively reduced, so that different impact force test effects can be achieved according to the size of the plate; At the same time, due to its large mass, the large plate will produce a stronger compression on the elastic member 334 when placed on the inner platform 313. When the falling ball body 24 hits the surface of the large plate, since the elastic member 334 has been greatly compressed, the buffering effect it can provide is relatively small, so that the falling ball body 24 can act on the large plate with a greater impact force, while the small plate is lighter in mass and has a weaker compression strength on the elastic member 334 than the large plate. When the falling ball body 24 hits the surface of the small plate, the remaining buffering space of the elastic member 334 is larger, the buffering effect is more significant, and the impact force will be relatively reduced. In this way, with the help of the different compression degrees of the elastic member 334 caused by the size of the plate, the same falling ball body 24 can adjust the impact force of plates of different sizes, ensuring that the large plate is subjected to a greater impact force and the small plate is subjected to a smaller impact force, effectively avoiding the situation where different plates are over-tested due to fixed falling ball conditions. At the same time, whether it is a large plate or a small plate, combined with the elastic member 334, the ball can bounce up multiple times with different amplitudes after falling, thereby achieving the effect of multiple tests on the plate.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An impact test device for automobile polycarbonate sheet, comprising a test device body (1), characterized in that: The test device body (1) comprises a base (13), a support mechanism (12) for horizontally placing a test plate is installed on the top of the base (13), a vertical rod (14) is fixedly installed on the top of the other side of the base (13), a ball drop mechanism (11) is installed on the upper end of the vertical rod (14), and the ball drop mechanism (11) is located directly above the support mechanism (12), and a bottom groove (131) is opened in the middle of the base (13); The support mechanism (12) comprises a clamp assembly (31) and an adaptor (33); the adaptor (33) is located below the clamp assembly (31); when the size of the test plate is relatively large, the adaptor (33) can be compressed to drive the clamp assembly (31) to slide downward, thereby increasing the distance between the test plate and the ball drop mechanism (11); when the size of the test plate is small, the test plate is placed on the surface of the clamp assembly (31) and can be closer to the ball drop mechanism (11).

2. The impact resistance test device for automobile polycarbonate sheet according to claim 1, characterized in that: The ball-dropping mechanism (11) comprises a support platform (22) fixedly connected to the upper surface of the vertical rod (14); an electromagnetic adsorption component (21) is fixedly mounted on the top of the support platform (22); the other end of the electromagnetic adsorption component (21) passes through the support platform (22) and is located at the bottom of the support platform (22); a ball-dropping body (24) is adsorbed and connected inside the bottom of the electromagnetic adsorption component (21); and a control box (23) is fixedly mounted on the side end of the support platform (22).

3. The impact resistance test device for automobile polycarbonate sheet according to claim 1, characterized in that: The clamp assembly (31) comprises a support platform (311), the support platform (311) being fixedly mounted on the top of the base (13), a protective cavity (312) being formed inside the support platform (311), an inner platform (313) being slidably disposed inside the protective cavity (312), a test plate being placed on the surface of the inner platform (313), a ball drop hole being disposed in the middle of the inner platform (313), and a clamping cover (32) for clamping the test plate being mounted on the top surface of the inner platform (313).

4. The impact resistance test device for automobile polycarbonate sheet according to claim 3, characterized in that: The clamping cover (32) comprises four corner rods (321) fixedly mounted on the top of the four corners of the inner platform (313); the surfaces of the four corner rods (321) are all threaded structures; a hollow pressing plate (323) is provided on the surface of the inner platform (313); the four ends of the hollow pressing plate (323) are sleeved on the surfaces of the four corner rods (321); the hollow pressing plate (323) and the four corner rods (321) are threadedly fixed via a plurality of fixing rings (322).

5. The impact resistance test device for automobile polycarbonate sheet according to claim 3, characterized in that: The adaptor (33) comprises two pads (331), the two pads (331) are symmetrically fixedly mounted inside the protective cavity (312), two fixed rods (332) are fixedly mounted on the surfaces of the two pads (331), the four fixed rods (332) are all hollow structures, movable rods (333) are movably mounted inside the four fixed rods (332), the sides of the four movable rods (333) away from the pads (331) are fixedly mounted on the bottom of the inner platform (313), four elastic members (334) are fixedly mounted between the inner platform (313) and the two pads (331), and the four elastic members (334) are respectively sleeved on the surfaces of the four movable rods (333).

6. The impact resistance test device for automobile polycarbonate sheet according to claim 3, characterized in that: An extension ring (314) is fixedly installed in the ball drop hole of the inner platform (313), the top of the extension ring (314) is flush with the upper surface of the inner platform (313), and the bottom of the extension ring (314) extends out of the lower surface of the inner platform (313).

7. The impact resistance test device for automobile polycarbonate sheet according to claim 3, characterized in that: Two side grooves (41) are provided on the inner walls of both sides of the protective cavity (312), and extension plates (42) are slidably provided inside the four side grooves (41). Two side clamping plates (4) are respectively clamped and installed at both ends of the inner platform (313), and the four side clamping plates (4) are respectively fixedly connected to one end of the four extension plates (42) away from the side grooves (41).

8. The impact resistance test device for automobile polycarbonate sheet according to claim 4, characterized in that: A gasket (5) is provided on one end of the hollow pressure plate (323) close to the inner platform (313), and the gasket (5) is made of a soft material.

9. The impact resistance test device for automobile polycarbonate sheet according to claim 3, characterized in that: An indicator mark (6) is provided in the middle of the surface of the inner platform (313), and the indicator mark (6) is used to indicate the placement position of the plate.

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