Ball strike test device

Abstract

The utility model discloses a ball strike test device, and relates to the technical field of battery pack testing. The ball strike test device comprises a to-be-tested piece fixing mechanism and a ball strike mechanism, wherein the to-be-tested piece fixing mechanism is used for fixing a to-be-tested piece. The ball hitting mechanism is arranged below the to-be-tested piece fixing mechanism and comprises a driving air cylinder, an air supply assembly and a brake assembly, the driving air cylinder comprises a cylinder body, an air rod and a ball hitting head, and the air supply assembly is connected with the cylinder body and used for controlling air pressure in the cylinder body; the air rod is slidably arranged in the cylinder body, the ball hitting head is arranged at the top of the air rod, and the brake assembly is arranged on the cylinder body and can tightly hold the brake air rod. According to the ball strike test device, the automatic ball strike test of the to-be-tested piece is realized, the accurate measurement of test indexes during the ball strike test is ensured, and meanwhile, the accuracy of a test result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack testing, in particular to a ball hitting test device. Background Art

[0002] In order to ensure that the battery pack of an electric vehicle operates safely and reliably in a collision or impact environment, it is often necessary to conduct an impact environment simulation test on the battery pack.

[0003] Conventional impact testing equipment manually lifts a steel ball to a certain height and releases it, allowing it to impact the battery pack to achieve the desired effect. This testing method has a low degree of automation, large test errors, and is not conducive to accurate measurement of test indicators. Furthermore, this testing method causes a secondary rebound impact after the steel ball impacts the battery pack casing, resulting in significant uncertainty in the accuracy of the test results. Utility Model Content

[0004] The purpose of the utility model is to provide a ball impact test device, which realizes the automated ball impact test of a battery pack and ensures the accuracy of the ball impact test result.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A ball impact test device comprising:

[0007] A device for fixing the test piece, used for fixing the test piece;

[0008] The ball striking mechanism is arranged below the test piece fixing mechanism, and the ball striking mechanism includes a driving cylinder, an air supply assembly and a brake assembly. The driving cylinder includes a cylinder body, an air rod and a ball striking head. The air supply assembly is connected to the cylinder body and is used to control the gas pressure in the cylinder body; the air rod is slidably arranged in the cylinder body, the ball striking head is arranged at the top of the air rod, and the brake assembly is arranged in the cylinder body and can clamp and brake the air rod.

[0009] As an optional solution of the ball hitting test device, the air supply assembly includes an air tank, an air outlet pipe and a control valve. The air tank is connected to the cylinder body through the air outlet pipe. The control valve is arranged on the air outlet pipe for controlling the gas pressure entering the cylinder body.

[0010] As an optional solution of the ball impact test device, the side wall of the cylinder body is provided with a plurality of pressure regulating holes, and the pressure regulating holes can be selectively closed by plugs.

[0011] As an optional solution of the ball hitting test device, a displacement sensor is provided on the air rod;

[0012] And / or, an acceleration sensor is provided at one end of the ball striking head close to the air rod.

[0013] As an optional solution of the ball hitting test device, a shielding cover is provided at one end of the air rod close to the ball hitting head, and the shielding cover is configured as an umbrella-shaped structure.

[0014] As an optional solution of the ball hitting test device, the ball hitting mechanism also includes a base, a first drive component and a second drive component, the drive cylinder is arranged on the base, the first drive component is used to drive the base to move along a first direction, and the second drive component is used to drive the first drive component to drive the base to move along a second direction, and the first direction is perpendicular to the second direction.

[0015] As an optional solution of the ball hitting test device, the test piece fixing mechanism includes a support assembly and a fixing assembly, the support assembly includes a support frame and a support column, the support column is arranged on the support frame, the fixing assembly is arranged on the support column, the test piece is placed on the support frame, and the fixing assembly is used to fix the test piece.

[0016] As an optional solution of the ball impact test device, the support assembly further includes two support beams, the two support beams are spaced apart and erected on the support frame, and the test piece is supported on the two support beams; the fixing assembly includes a fixed pressure rod and a locking nut, the fixed pressure rod being height-adjustably arranged on two opposing support columns for pressing the test piece, and the locking nut cooperating with the support column to lock the fixed pressure rod;

[0017] The fixed pressure rod is arranged perpendicular to the support beam, and two fixed pressure rods are provided. The distance between the two support beams and the distance between the two fixed pressure rods are both adjustable.

[0018] As an optional solution of the ball hitting test device, the ball hitting head is detachably connected to the air rod.

[0019] As an optional solution of the ball hitting test device, the driving cylinder is provided with an optical positioning member, and the optical positioning member is used to locate the ball hitting position of the test piece.

[0020] Beneficial effects of the utility model:

[0021] The ball striking test device provided by the utility model fixes the workpiece to be tested by providing a workpiece fixing mechanism, and the ball striking mechanism is provided below the workpiece fixing mechanism, and is used to perform a ball striking test on the workpiece to be tested. The ball striking mechanism includes a driving cylinder, an air supply assembly, and a brake assembly. A ball striking head is provided on the top of the air rod of the driving cylinder. The air supply assembly is used to provide gas to the cylinder body of the driving cylinder. The driving air rod drives the ball striking head to strike the target ball striking position of the workpiece to be tested, and controls the gas pressure to ensure accurate measurement of the test indicators. By providing a brake assembly on the cylinder body, the brake air rod is clamped after the ball striking head hits the target ball striking position, preventing the ball striking head from rebounding and impacting a second time, which affects the accuracy of the test results. The ball striking test device realizes an automated ball striking test of the workpiece to be tested, ensures accurate measurement of the test indicators during the ball striking test, and improves the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the cooperation between the ball hitting test device and the auxiliary installation mechanism provided in a specific embodiment of the utility model;

[0023] Figure 2 It is a structural diagram of a ball hitting test device provided by a specific embodiment of the utility model;

[0024] Figure 3 It is a structural diagram of a fixing mechanism for a piece to be tested provided by a specific embodiment of the utility model;

[0025] Figure 4 It is a structural diagram of the driving cylinder, air supply assembly and brake assembly provided by a specific embodiment of the utility model;

[0026] Figure 5 It is a structural diagram of a ball hitting mechanism provided by a specific embodiment of the utility model.

[0027] In the picture:

[0028] 1. Fixing mechanism for the test piece; 11. Support assembly; 111. Support frame; 112. Support legs; 113. Support columns; 114. Support beams; 12. Fixing assembly; 121. Fixing rod; 122. Locking nut; 13. Moving seat;

[0029] 2. Ball striking mechanism; 21. Driving cylinder; 211. Cylinder body; 2111. Pressure regulating hole; 212. Air rod; 213. Ball striking head; 214. Shielding cover; 22. Air supply assembly; 221. Air storage tank; 222. Air outlet pipe; 223. Control valve; 23. Brake assembly; 24. First driving assembly; 241. First motor; 242. First lead screw; 243. First slide; 25. Second driving assembly; 251. Second motor; 252. Second lead screw; 253. Nut seat; 254. Second slide; 255. Guide rod mounting seat; 256. Guide rod; 257. Mounting plate; 26. Optical positioning member; 27. Base;

[0030] 3. Auxiliary installation mechanism; 31. Pedal; 32. Fence; 33. Ladder. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0032] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] like Figure 1 and Figure 2 As shown, this embodiment provides a ball hitting test device, including a test piece fixing mechanism 1, a ball hitting mechanism 2, an air source control system and an auxiliary installation mechanism 3. The test piece fixing mechanism 1 is used to fix the test piece, the ball hitting mechanism 2 is arranged below the test piece fixing mechanism 1, and is used to hit the target ball hitting position of the test piece, the air source control system is used to provide power to the ball hitting mechanism 2, and the auxiliary installation mechanism 3 is arranged on the side of the test piece fixing mechanism 1, and is used to assist test personnel in performing operations such as installation, disassembly and inspection of the test piece.

[0034] The ball impact test device provided in this embodiment is used for impact testing of battery packs, simulating the functional reliability and structural integrity of electric vehicle battery packs subjected to external impact. This ball impact test device utilizes a pneumatic control system to control the operation of the ball impact mechanism 2, resulting in a high degree of automation and minimal test error, facilitating accurate measurement of test parameters.

[0035] like Figure 3As shown, the device under test fixing mechanism 1 includes a support assembly 11 and a fixing assembly 12. The support assembly 11 includes a support frame and support columns 113. The support columns 113 are arranged on the support frame, and the fixing assembly 12 is arranged on the support columns 113. The device under test is placed on the support frame, and the fixing assembly 12 is used to fix the device under test. The support frame includes support legs 112 and a support frame 111. The device under test is placed on the support frame 111. Support legs 112 are provided below the four corners of the support frame 111 to prop up the support frame 111 to a certain height so that the ball striking mechanism 2 can be arranged below the support frame 111. The device under test placed on the support frame 111 is fixed by the fixing assembly 12 to prevent the battery pack from shifting under the impact force of the ball striking mechanism 2, which would cause inaccurate test results.

[0036] In one embodiment, the support assembly 11 further includes two support beams 114, which are spaced apart and mounted on the support frame. The DUT is supported on the two support beams 114. The fixing assembly 12 includes a fixed pressure rod 121 and a locking nut 122. The fixed pressure rod 121 is height-adjustably mounted on two opposing support columns 113 and is used to compress the DUT. The locking nut 122 cooperates with the support column 113 to lock the fixed pressure rod 121. The DUT is placed on the support beams 114 on the support frame 111. The fixed pressure rod 121 on the support column 113 is then moved according to the height of the battery pack, so that the fixed pressure rod 121 compresses the battery pack. The support column 113 is provided with a locking thread, and the locking nut 122 cooperates with the locking thread to fix the position of the fixed pressure rod 121 on the support column 113. This allows the fixed pressure rod 121 to compress the battery pack and ensure the stability of the battery pack. This fixing method is relatively simple and more convenient to operate while ensuring stable fixing.

[0037] Furthermore, the fixed pressure rod 121 is arranged perpendicular to the support beam 114, and there are two fixed pressure rods 121, and the spacing between the two support beams 114 and the spacing between the two fixed pressure rods 121 are both adjustable. By setting two support beams 114 to support the battery pack, and setting the spacing between the support beams 114 to be adjustable, the spacing between the two support beams 114 is adjusted according to the size of the battery pack, which is suitable for battery packs of various specifications. Similarly, the battery pack is pressed by the two fixed pressure rods 121 to ensure the stability of the fixation, and at the same time, the spacing between the two fixed pressure rods 121 is adjusted to adapt to the size of battery packs of different specifications. The fixed pressure rod 121 is arranged perpendicular to the support beam 114, so that there will be no interference in the process of adjusting the position of the fixed pressure rod 121 and the support beam 114.

[0038] Specifically, the support beam 114 extends along the length of the support frame 111, and the fixed pressure rod 121 extends along the width of the support frame 111. Four support columns 113 are provided, with two opposing support columns 113 forming a group. Through-holes are provided at both ends of the fixed pressure rod 121, and the two ends of the fixed pressure rod 121 are attached to the two opposing support columns 113 through the through-holes.

[0039] Both ends of the support beam 114 and the bottom of the support column 113 are slidably connected to the support frame 111 through the movable seat 13. After the position between the two support beams 114 and the position between the two fixed pressure rods 121 are adjusted, the movable seat 13 and the support frame 111 are fixed by screws.

[0040] Of course, in other embodiments, sliders can also be set at both ends of the support beam 114 and the bottom of the support column 113, and sliding grooves can be set at corresponding positions of the support frame 111. The sliders cooperate with the sliding grooves so that the support beam 114 and the support column 113 can slide on the support frame 111.

[0041] In one embodiment, if Figure 4 As shown, the ball striking mechanism 2 includes a driving cylinder 21, an air supply assembly 22, and a brake assembly 23. The driving cylinder 21 includes a cylinder body 211, an air rod 212, and a ball striking head 213. The air supply assembly 22 is connected to the cylinder body 211 and is used to control the gas pressure within the cylinder body 211. The air rod 212 is slidably mounted within the cylinder body 211, and the ball striking head 213 is mounted on top of the air rod 212. The brake assembly 23 is mounted within the cylinder body 211 and can clamp the air rod 212. The air supply assembly 22 provides gas at a set pressure within the cylinder body 211, enabling the air rod 212 to move at a set speed. The pressure when the ball striking head 213 reaches the target ball striking position of the battery pack is the impact force in the test index.

[0042] The air supply assembly 22 is used to supply gas to the cylinder body 211 of the driving cylinder 21. The driving air rod 212 drives the ball striking head 213 to strike the target ball striking position on the test piece, and controls the gas pressure to ensure accurate measurement of test parameters. By providing a brake assembly 23 on the cylinder body 211, the brake air rod 212 is tightened after the ball striking head 213 strikes the target ball striking position, preventing the ball striking head 213 from rebounding and impacting the accuracy of the test results. This ball striking test device realizes automated ball striking testing of test pieces, ensuring accurate measurement of test parameters during ball striking tests and improving the accuracy of test results.

[0043] Specifically, the gas supply assembly 22 includes a gas tank 221, an outlet pipe 222, and a control valve 223. The gas tank 221 is connected to the cylinder 211 via the outlet pipe 222. The control valve 223 is located in the outlet pipe 222 and is used to control the pressure of the gas entering the cylinder 211. The pressure in the gas tank 221 is a pre-stored set pressure gas. The control valve 223 is a quick-opening valve. During testing, the quick-opening valve is controlled to open, allowing the gas in the gas tank 221 to be quickly released into the cylinder 211 through the outlet pipe 222, driving the gas rod 212 to move the ball striking head 213. The quick-opening valve can be a solenoid valve or a mechanical valve.

[0044] The air source control system includes an air compressor, a pressure control valve, a flow control valve, a directional control valve, a function control valve, an air pipe, a filter, and a pressure gauge. The air source control system is used to provide air at a set pressure to the air storage tank 221. The specific structure and operating principle of the air source control system are not the invention's improvement points of this embodiment and can be configured with reference to the existing technology, so they will not be described in detail here.

[0045] The initial velocity of the air rod 212 driving the air cylinder 21 can be calculated according to the following formula:

[0046] Where p0 is the initial pressure, in Pa; V0 is the initial volume of the gas tank 221, in m 3 φ is the secondary work calculation coefficient, which is 1.2 for air boundary mass; m is the mass of the air rod 212 and the ball hitting head 213, in kg; a is the air constant, which is 1.4 for air boundary mass; Sx is the volume of the cylinder 211, in m 3 ; g is the acceleration due to gravity, unit is m / s 2 ; μ is the sliding friction coefficient; x is the acceleration distance, unit is m.

[0047] The initial velocity of the driving cylinder 21 is determined by the initial pressure of the gas tank 221. This initial pressure is the pressure at which the gas source control system controls the gas entering the gas tank 221, and is also the set pressure of the gas stored in the gas tank 221. Therefore, the initial velocity is calculated based on the impact force required by the test specification. The initial pressure is then calculated using the aforementioned formula. The gas source control system then controls the gas pressure entering the gas tank 221 to be the initial pressure, which yields the set pressure of the gas stored in the gas tank 221.

[0048] In order to monitor the speed of the air rod 212 during the ball hitting test, a displacement sensor is also provided on the air rod 212 to calculate the speed of the air rod 212 during the movement according to the displacement of the air rod 212 to meet the speed monitoring requirements during the test.

[0049] Furthermore, a plurality of pressure regulating holes 2111 are provided on the side wall of the cylinder body 211 , and the pressure regulating holes 2111 can be selectively closed by plugs.

[0050] If it is monitored during the test that the speed of the gas rod 212 does not meet the test index, the impact speed of the gas rod 212 can be fine-tuned by selecting the number of closed and opened pressure regulating holes 2111.

[0051] Specifically, the pressure regulating hole 2111 is configured as a threaded hole, and the plug is configured as a screw plug, which is screwed into the threaded hole. If the speed of the air rod 212 is too high, the screw plug is screwed to remove it, connecting the pressure regulating hole 2111 to the outside world, releasing some of the pressure in the cylinder 211, and thus reducing the speed of the air rod 212. If the speed of the air rod 212 is too low, the screw plug is used to block the pressure regulating hole 2111, increasing the pressure in the cylinder 211 and thereby increasing the speed of the air rod 212.

[0052] In one embodiment, an acceleration sensor is provided at one end of the striking head 213 near the air rod 212. The acceleration sensor detects the acceleration of the striking head 213 when it strikes the battery pack at the target striking position, thereby calculating the magnitude of the impact force on the battery pack. This ensures that the impact force on the battery pack is within the set impact force in the test index, achieves accurate measurement of the test index, and ensures the accuracy of the test results.

[0053] In one embodiment, the striking head 213 is detachably connected to the air rod 212. By detachably connecting the striking head 213 to the air rod 212, the striking head 213 can be replaced with a striking head 213 of different diameters and materials according to test requirements. The striking head 213 is threaded or snap-fitted to the air rod 212.

[0054] In one embodiment, a shielding cover 214 is provided at one end of the air rod 212 near the striking head 213. The shielding cover 214 is configured in an umbrella-like structure. The umbrella-like structure of the shielding cover 214 allows for the installation of a waterproof tarp to prevent electrolyte leakage from damaging the target striking position of the battery pack during a striking test, which could corrode and damage components such as the cylinder 211.

[0055] In one embodiment, the brake assembly 23 includes a guide cylinder, a locking block and a brake pad. A plurality of locking blocks are arranged in the guide cylinder, and a plurality of brake pads are arranged on the inner side of each locking block. An air bag is provided between the inner wall of the guide cylinder and the plurality of locking blocks. An inflation port connected to the air bag is provided on the side wall of the guide cylinder. When air is inflated into the air bag through the inflation port, the air bag expands and compresses the locking block inward, thereby driving the brake pad at the front end of the locking block to hold the air rod 212 passing through the center position of the guide cylinder, and the inflation port is inflated through the air source control system to control the braking of the brake assembly 23.

[0056] In one embodiment, if Figure 5As shown, the striking mechanism 2 further includes a base 27, a first drive assembly 24, and a second drive assembly 25. The drive cylinder 21 is disposed on the base 27. The first drive assembly 24 is used to drive the base 27 to move in a first direction, and the second drive assembly 25 is used to drive the first drive assembly 24 to drive the base 27 in a second direction, with the first direction being perpendicular to the second direction. The first drive assembly 24 drives the drive cylinder 21 in the first direction via the base 27, while the second drive assembly 25 drives the drive cylinder 21 in the second direction via the first drive assembly 24 and the base 27. This achieves precise positioning of the striking head 213 in the first and second directions, allowing the striking head 213 to align with the target striking position of the battery pack.

[0057] The first direction is as Figure 5 The X-axis direction is shown, and the second direction is as shown Figure 5 The first driving assembly 24 and the second driving assembly 25 can drive the driving cylinder 21 to move in the X-axis and Y-axis directions.

[0058] Specifically, the first drive assembly 24 includes a first motor 241, a first lead screw 242 and a first slide 243. The first motor 241 and the first lead screw 242 are installed on the first slide 243. The base 27 is slidably arranged on the first slide 243 through the first slider, and a center threaded hole is provided on the base 27. The first lead screw 242 is transmission-connected to the center threaded hole. The first motor 241 is connected to the first lead screw 242 for driving the first lead screw 242 to rotate. The rotation of the first lead screw 242 drives the base 27 to move along the X-axis direction, thereby driving the driving cylinder 21 to move along the X-axis direction.

[0059] The second driving assembly 25 includes a second motor 251, a second lead screw 252, a nut seat 253, a guide component and two mounting plates 257. The second motor 251 is connected to the second lead screw 252 for driving the second lead screw 252 to rotate. The second lead screw 252 is transmission-connected to the nut seat 253. The bottom of the first slide 243 is connected to the nut seat 253. The two mounting plates 257 are spaced apart along the Y-axis direction. The guide component includes a guide rod 256 and a guide rod mounting seat 255. The two ends of the guide rod 256 are respectively fixed to the two mounting plates 257 through the guide rod mounting seat 255. The first slide 243 is slidingly connected to the guide rod 256 through the second slider 254. The second motor 251 drives the second lead screw 252 to rotate, and drives the first slide 243 to move along the extension direction of the guide rod 256 (i.e., the Y-axis direction) through the nut seat 253.

[0060] In one embodiment, the driving cylinder 21 is equipped with an optical locator 26 for locating the impact position of the test object. After the first and second driving assemblies 24 and 25 drive the driving cylinder 21 into position, the optical locator 26 detects whether the impact head 213 is aligned with the target impact position of the battery pack. This ensures the accuracy of the battery pack's impact position and facilitates adjustment of the driving cylinder 21's position.

[0061] Specifically, the optical positioning member 26 is arranged on the periphery of the brake assembly 23. The optical positioning member 26 is an infrared emitter. The infrared emitter emits infrared rays. When the emitted infrared rays are projected onto the bottom of the battery pack, the distance between the projection of the infrared rays on the bottom of the battery pack and the target ball hitting position is the same as the distance between the infrared emitter and the ball hitting head 213, it means that the ball hitting head 213 is aligned with the target ball hitting position of the battery pack. At this time, the position of the driving cylinder 21 is adjusted into place.

[0062] The ball impact test device also includes a control and measurement system. A displacement sensor and an acceleration sensor are communicatively connected to the control and measurement system. The infrared transmitter, first motor 241, second motor 251, and air source control system are all electrically connected to the control and measurement system. The displacement sensor and acceleration sensor transmit their detection values ​​to the control and measurement system, which then calculates and determines whether the received detection values ​​are consistent with the test specifications. The control and measurement system controls the infrared transmitter to emit infrared light and controls the operation of first motor 241 and second motor 251. The control structure and control principle of the control and measurement system are not improvements of this embodiment and can be designed with reference to existing technologies. These details will not be elaborated here.

[0063] The auxiliary installation mechanism 3 is arranged around the support frame 111, including a pedal 31 arranged around the support frame 111, a fence 32 arranged at one end of the pedal 31 away from the support frame 111, and a ladder 33 arranged on one side. When installing the battery pack, the tester climbs up the pedal 31 through the ladder 33, walks along the pedal 31 to the installation position of the battery pack, first lifts the fixed pressure rod 121, then places the battery pack on the support beam 114, and then moves the fixed pressure rod 121 to abut against the battery pack, and locks the fixed pressure rod 121 on the support beam 114 through the locking nut 122. The control and measurement system then controls the operation of the first motor 241 and the second motor 251, moving the drive cylinder 21 until the striking head 213 is aligned with the target striking position of the battery pack. The gas source control system then provides gas at a set pressure to the gas tank 221. The quick-opening valve is then controlled to open, allowing gas at the set pressure to enter the cylinder 211 from the gas tank 221 through the outlet pipe 222, driving the gas rod 212 to move the striking head 213 and impact the target striking position of the battery pack. During the test, the control and measurement system receives the detection value of the displacement sensor and, based on the detection value, determines whether the speed of the gas rod 212 meets the speed requirements of the test specifications. If not, the tester is notified. The tester then adjusts the gas pressure in the cylinder 211 by controlling the amount of opening of the plug of the pressure regulating hole 2111 to ensure that the speed of the gas rod 212 meets the speed requirements of the test specifications. After the impact test is completed, the control and measurement system calculates whether the impact force at the target striking position of the battery pack meets the impact force requirements of the test specifications based on the detection value received from the acceleration sensor, thereby ensuring the accuracy of the test results.

[0064] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. A ball impact test device, characterized in that: include: A test piece fixing mechanism (1) for fixing the test piece; A ball striking mechanism (2) is provided below the test piece fixing mechanism (1). The ball striking mechanism (2) comprises a driving cylinder (21), an air supply assembly (22) and a brake assembly (23). The driving cylinder (21) comprises a cylinder body (211), an air rod (212) and a ball striking head (213). The air supply assembly (22) is connected to the cylinder body (211) and is used to control the gas pressure in the cylinder body (211). The air rod (212) is slidably provided in the cylinder body (211). The ball striking head (213) is provided at the top of the air rod (212). The brake assembly (23) is provided in the cylinder body (211) and can clamp and brake the air rod (212).

2. The ball impact test device according to claim 1, wherein: The gas supply assembly (22) comprises a gas storage tank (221), a gas outlet pipeline (222) and a control valve (223); the gas storage tank (221) is connected to the cylinder (211) via the gas outlet pipeline (222); the control valve (223) is provided on the gas outlet pipeline (222) and is used to control the pressure of gas entering the cylinder (211).

3. The ball impact test device according to claim 1, wherein: The side wall of the cylinder body (211) is provided with a plurality of pressure regulating holes (2111), and the pressure regulating holes (2111) can be selectively closed by plugs.

4. The ball impact test device according to claim 1, wherein: The gas rod (212) is provided with a displacement sensor; And / or, an acceleration sensor is provided at one end of the ball striking head (213) close to the air rod (212).

5. The ball impact test device according to claim 1, wherein: A shielding cover (214) is provided at one end of the air rod (212) close to the ball hitting head (213), and the shielding cover (214) is configured as an umbrella-shaped structure.

6. The ball hitting test device according to any one of claims 1 to 5, characterized in that: The ball striking mechanism (2) further comprises a base (27), a first driving assembly (24) and a second driving assembly (25); the driving cylinder (21) is arranged on the base (27); the first driving assembly (24) is used to drive the base (27) to move along a first direction; the second driving assembly (25) is used to drive the first driving assembly (24) to drive the base (27) to move along a second direction; the first direction is perpendicular to the second direction.

7. The ball hitting test device according to any one of claims 1 to 5, characterized in that: The test piece fixing mechanism (1) comprises a support assembly (11) and a fixing assembly (12); the support assembly (11) comprises a support frame and a support column (113); the support column (113) is arranged on the support frame; the fixing assembly (12) is arranged on the support column (113); the test piece is placed on the support frame; and the fixing assembly (12) is used to fix the test piece.

8. The ball impact test device according to claim 7, wherein: The support assembly (11) further comprises two support beams (114), the two support beams (114) being spaced apart and mounted on the support frame, and the test piece being supported on the two support beams (114); the fixing assembly (12) comprises a fixed pressure rod (121) and a locking nut (122), the fixed pressure rod (121) being height-adjustably mounted on two opposing support columns (113) for pressing the test piece, and the locking nut (122) cooperating with the support column (113) to lock the fixed pressure rod (121); The fixed pressure rod (121) is arranged perpendicular to the support beam (114), and two fixed pressure rods (121) are provided. The distance between the two support beams (114) and the distance between the two fixed pressure rods (121) are both adjustable.

9. The ball hitting test device according to any one of claims 1 to 5, characterized in that: The ball striking head (213) is detachably connected to the air rod (212).

10. The ball hitting test device according to any one of claims 1 to 5, characterized in that: An optical positioning member (26) is provided on the driving cylinder (21), and the optical positioning member (26) is used to locate the ball hitting position of the test piece.

Images