Falling ball impact test device

Abstract

The utility model relates to a falling ball impact test device which comprises an acceleration sensor and an impact ball used for impacting a sample, the impact ball comprises an upper ball body and a lower ball body which are detachably connected, a mounting groove is formed in the center of the interior of the lower ball body, and the acceleration sensor is mounted in the mounting groove. A cavity channel communicated with the installation groove is formed in the upper ball body, a wire penetrating hole communicated with the cavity channel is formed in the upper portion of the upper ball body, and a wire penetrates through the wire penetrating hole and extends into the installation groove along the cavity channel to be electrically connected with the acceleration sensor. Based on the structure, after the sample is fixed on the tool, the impact ball impacts the sample at the corresponding impact height, and in the process, the acceleration sensor can obtain acceleration data and transmit the acceleration data to external equipment through the wire, so that the impact resistance of the sample is accurately obtained, and collision protection is more accurately evaluated.

Description

TECHNICAL FIELD

[0001] The utility model relates to impact experiment technical field especially relates to a falling ball impact test device. BACKGROUND

[0002] The falling ball impact test is mainly used to test the impact resistance of products, and is suitable for testing the impact resistance of products such as plastic, ceramic, acrylic, glass, lens and hardware. When working, the test product is placed on the test table, the drop key is pressed to make the impact ball of a specified weight freely fall from a specified drop height on the product, and then the appearance and performance of the product are checked, and the test results are recorded. However, the current test device cannot obtain the acceleration data during the impact process, and the impact resistance of the sample cannot be accurately obtained, so that the impact protection cannot be accurately evaluated. SUMMARY

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the application provides a falling ball impact test device.

[0004] The application provides a falling ball impact test device, which comprises an acceleration sensor and an impact ball for impacting a test sample, the impact ball comprises an upper ball body and a lower ball body connected detachably, a mounting groove is formed in the central position of the lower ball body, the acceleration sensor is mounted in the mounting groove, a cavity is formed in the inside of the upper ball body and communicates with the mounting groove, a threading hole is formed in the upper part of the upper ball body and communicates with the cavity, and the threading hole is used for threading the lead wire into the mounting groove along the cavity and electrically connecting with the acceleration sensor.

[0005] In a possible implementation, the surfaces of the upper ball body and the lower ball body facing each other are arranged in a plane, a first connecting hole is formed in the surface of the upper ball body close to the lower ball body, and a second connecting hole matched with the first connecting hole is formed in the surface of the lower ball body close to the upper ball body.

[0006] The diameter of the threading hole is greater than the diameter of the lead wire.

[0007] In a possible implementation, a pressing plate is further included, the pressing plate is fixed in the mounting groove, and the acceleration sensor is fixedly connected with the pressing plate.

[0008] In a possible implementation, a display and a data collector are further included, the data collector is electrically connected with the acceleration sensor through the lead wire, and the display is electrically connected with the data collector.

[0009] In a possible implementation, the height frame comprises a vertical rod and a horizontal rod movably connected to the vertical rod, the horizontal rod extends in a direction perpendicular to the vertical rod, and the electromagnetic suction piece is fixed to an end of the horizontal rod away from the vertical rod and used for attracting the impact ball.

[0010] In a possible implementation, a center of the top of the impact ball is provided with a positioning pin extending vertically upward, and a bottom surface of the electromagnetic suction piece is provided with a positioning hole matched with the positioning pin.

[0011] In a possible implementation, the test box is located below the horizontal rod, and a top of the test box is provided with an opening for the impact ball to drop into the test box, and the tool is fixed inside the test box and located directly below the electromagnetic suction piece, and the tool is used for fixing the sample to be impacted.

[0012] In a possible implementation, a bottom plate of the test box is provided with a first mounting hole, and the tool is provided with a second mounting hole matched with the first mounting hole.

[0013] In a possible implementation, a buffer layer is attached to an inner wall of the test box, and the buffer layer is used for absorbing the impact force of the impact ball and the noise generated.

[0014] In a possible implementation, the vertical rod is marked with a scale line.

[0015] Compared with the prior art, the above technical solution provided by the embodiments of the present application has the following advantages:

[0016] By arranging the mounting groove in the center of the lower ball body, fixing the acceleration sensor in the mounting groove, then connecting the lower ball body and the upper ball body to form the impact ball, fixing the sample on the tool, and impacting the sample at a corresponding impact height, the acceleration sensor can obtain acceleration data during the process and transmit the data to an external device through a wire, so as to accurately obtain the impact resistance of the sample and more accurately evaluate the impact protection. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the technical features, objectives and effects of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiment or prior art description. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] In the drawings:

[0020] Figure 1 is a structural schematic diagram of an embodiment of the falling ball impact test device of the present application;

[0021] Figure 2 is a structural schematic diagram of the impact ball in the falling ball impact test device of the present application;

[0022] Figure 3 is a structural schematic diagram of the test box and the tooling in the falling ball impact test device of the present application;

[0023] Figure 4 is a structural schematic diagram of another embodiment of the falling ball impact test device of the present application.

[0024] Reference signs:

[0025] 10, impact ball; 11, upper ball body; 11a, threading hole; 11b, cavity; 12, lower ball body; 20, acceleration sensor; 30, lead wire; 40, positioning pin; 50, pressing plate; 60, height frame; 61, vertical rod; 62, horizontal rod; 70, electromagnetic suction piece; 80, test box; 80a, opening; 90, tooling; 100, test sample; 200, data acquisition device; 300, display; 400, controller. DETAILED DESCRIPTION

[0026] In order to have a more clear understanding of the technical features, objectives and effects of the present application, the specific implementation manner of the present application will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or position relations indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or position relations shown in the drawings, the specific directions are constructed and operated, and are only for the convenience of describing the present technical solution, and cannot be understood as indicating that the devices or elements indicated must have a specific direction, therefore, it cannot be understood as a limitation on the present application.

[0027] It should be noted that, unless otherwise explicitly specified and limited, the terms such as "mounting", "connecting", "connecting", "fixing", "arranging" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or one or more intervening elements can be present. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In the following description, specific details such as specific system structures, techniques, etc. are presented in order to facilitate a thorough understanding of the embodiments of the present application for the purpose of explanation, rather than for the purpose of limitation. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted in order not to obscure the description of the present application with unnecessary details.

[0029] Please refer to Figure 1 The present application provides a falling ball impact test device, which comprises an acceleration sensor 20, a height frame 60, an electromagnetic suction piece 70, a test box 80 and an impact ball 10 for impacting a test sample 100. The electromagnetic suction piece 70 is fixed on the height frame 60 and used for adsorbing the impact ball 10. The test box 80 is located below the electromagnetic suction piece 70 and is provided with a tool 90 for fixing the test sample 100 inside the test box 80.

[0030] Please refer to Figure 2 Specifically, the impact ball 10 comprises a detachably connected upper ball body 11 and a lower ball body 12. An installation groove is formed at the center position inside the lower ball body 12. The acceleration sensor 20 is installed in the installation groove. A cavity 11b is formed in the inside of the upper ball body 11 and is in communication with the installation groove. A threading hole 11a is formed in the upper part of the upper ball body 11 and is in communication with the cavity 11b. The threading hole 11a is used for threading the lead wire 30 into the installation groove along the cavity 11b and electrically connecting with the acceleration sensor 20.

[0031] Exemplarily, the impact ball 10 is detachably connected by the upper ball body 11 and the lower ball body 12, an installation groove is arranged in the center of the lower ball body 12, and the acceleration sensor 20 is fixed in the installation groove. Then, one end of the lead wire 30 is inserted into the installation groove from the lead wire hole 11a and extends into the installation groove along the cavity 11b to be electrically connected with the acceleration sensor 20. In this way, the acceleration data obtained by the acceleration sensor 20 during the impact process can be transmitted to an external device, so that the impact resistance of the material can be more accurately evaluated. It should be noted that after the acceleration sensor 20 is installed in the installation groove, the acceleration sensor 20 needs to be fixedly connected and cannot move relatively, so that the obtained acceleration data is more accurate.

[0032] Exemplarily, the electromagnetic suction piece 70 is used to suck the impact ball 10. The height of the electromagnetic suction piece 70 can be correspondingly set according to the height of the sample 100 to be impacted by the impact ball 10. For example, when the sample 100 needs to be impacted by the impact ball 10 at a height of 2 m, the electromagnetic suction piece 70 is first adjusted to a height of 2 m from the tool 90, and then the impact ball 10 is sucked onto the electromagnetic suction piece 70. After the sample 100 is fixed on the tool 90, the electromagnetic suction piece 70 is controlled to be powered off, so that the magnetic attraction force of the impact ball 10 disappears, and the impact ball 10 falls freely to impact the sample 100 on the tool 90. In addition, the electromagnetic suction piece 70 can be an electromagnet which forms a uniform and large enough magnetic attraction force on the plane of the electromagnet facing the tool 90 by using the principle of generating electricity by magnetism, so as to stably suck the impact ball 10, but is not limited thereto. The electromagnetic suction piece 70 can be electrically connected with a controller 400 (such as a current control switch). The controller 400 is used to control the current of the electromagnetic suction piece 70 to be powered on or powered off, so as to control the electromagnetic suction piece 70 to generate or not generate a magnetic attraction force, thereby realizing automatic falling of the impact ball 10.

[0033] In addition, a laser (not shown) can also be installed on the electromagnetic suction piece 70, so that the impact position of the sample 100 can be predicted by the laser, thereby achieving the purpose of accurate positioning.

[0034] Exemplarily, the tool 90 is fixed in the test box 80, so that the impact ball 10 can continue to stay in the test box 80 after impacting the sample 100 and will not fall out to the outside, thereby avoiding the impact ball 10 from randomly rolling and affecting the test efficiency. In addition, after the sample 100 is placed on the tool 90, the sample 100 needs to be fixed by using fasteners (such as bolts, screws, etc.), so as to avoid jumping during the impact process and causing inaccurate impact test data.

[0035] Exemplarily, the height frame 60 can adopt a structure capable of being manually or electrically adjusted in height, so as to correspondingly adjust the height of the electromagnetic suction piece 70 according to different impact height requirements of the sample 100, thereby meeting different impact height requirements.

[0036] Based on the technical features described above, the falling ball impact test device can set the mounting groove in the center of the lower ball body 12, and fix the acceleration sensor 20 in the mounting groove, and then connect the lower ball body 12 with the upper ball body 11 to form the impact ball 10. After the sample 100 is fixed on the tooling 90, the impact ball 10 impacts the sample 100 at a corresponding impact height. In this process, the acceleration sensor 20 can obtain acceleration data and transmit the data to external equipment through the wire 30, so as to accurately obtain the impact resistance performance of the sample 100 and more accurately evaluate the impact protection.

[0037] In a possible implementation, the surfaces of the upper ball body 11 and the lower ball body 12 facing each other are flat, and the surface of the upper ball body 11 close to the lower ball body 12 is provided with a first connecting hole, and the surface of the lower ball body 12 close to the upper ball body 11 is provided with a second connecting hole matched with the first connecting hole.

[0038] Exemplarily, the surfaces of the upper ball body 11 and the lower ball body 12 facing each other are flat, so that the upper ball body 11 and the lower ball body 12 can be more closely fitted, and then the fastener (such as a bolt) can be used to pass through the first connecting hole and the second connecting hole in sequence, thereby realizing the detachable connection of the upper ball body 11 and the lower ball body 12, which is simple in structure and convenient to disassemble and assemble.

[0039] In a possible implementation, the diameter of the threading hole 11a is greater than the diameter of the wire 30. In this way, the wire 30 can be ensured to pass into the cavity 11b from the threading hole 11a and extend into the mounting groove to be electrically connected with the acceleration sensor. In addition, the hole edge of the threading hole 11a is rounded, which can effectively reduce the abrasion of the wire 30 in the impact process and protect the wire 30 to a certain extent.

[0040] In a possible implementation, the pressure plate 50 is further included, the pressure plate 50 is fixed in the mounting groove, and the acceleration sensor 20 is fixedly connected with the pressure plate 50. It should be noted that the pressure plate 50 can be fixed in the mounting groove by means of screws or bolts, and at this time the pressure plate 50 can press the acceleration sensor 20, so as to avoid the acceleration sensor 20 from jumping in the falling process of the impact ball 10, and thus the acceleration data obtained can be more accurate.

[0041] Please refer to Figure 1 and Figure 3In a possible implementation, the test box 80 is located below the horizontal rod 62, and the top of the test box 80 is provided with an opening 80a for the impact ball 10 to drop into the test box 80, and the jig 90 is fixed inside the test box 80 and located directly below the electromagnetic suction member 70, and the jig 90 is used to fix the test sample 100 to be impacted.

[0042] Specifically, the bottom plate of the test box 80 is provided with a first mounting hole, and the jig 90 is provided with a second mounting hole matched with the first mounting hole.

[0043] For example, the test box 80 can be made of metal material and has sufficient pressure resistance to resist the impact force after the impact of the impact ball 10. By providing the first mounting hole on the bottom plate of the test box 80 and the second mounting hole on the jig 90, the second mounting hole is aligned with the first mounting hole after the jig 90 is placed on the bottom plate of the test box 80, and then the fastener is used to pass through the second mounting hole and the first mounting hole in sequence, so that the jig 90 can be detachably installed in the test box 80, so that the corresponding jig 90 can be replaced according to the test sample 100 of different sizes.

[0044] Please refer to Figure 4 In a possible implementation, the display 300 and the data collector 200 are further included, the data collector 200 is electrically connected with the acceleration sensor 20 through the wire 30, and the display 300 is electrically connected with the data collector 200. In this way, the data collector 200 and the acceleration sensor 20 are electrically connected through the wire 30, so that the acceleration data detected by the acceleration sensor 20 can be collected by the data collector 200, and then transmitted to the display 300 for display, so that the experimenter can obtain the acceleration data in the test process in time. It should be noted that the data collector 200 is used to collect the acceleration data detected by the acceleration sensor 20, and then how to transmit the collected data to the display 300 and the specific connection mode thereof belong to the common knowledge of those skilled in the art, and will not be described here.

[0045] In a possible implementation, the height frame 60 includes a vertical rod 61 and a horizontal rod 62 movably connected with the vertical rod 61, the horizontal rod 62 extends in a direction perpendicular to the vertical rod 61, and the electromagnetic suction member 70 is fixed to one end of the horizontal rod 62 away from the vertical rod 61, and the electromagnetic suction member 70 is used to adsorb the impact ball 10. In this way, the electromagnetic suction member 70 is fixed to the horizontal rod 62, and then the position of the horizontal rod 62 on the vertical rod 61 is adjusted, so that the height of the electromagnetic suction member 70 is adjusted, thereby meeting the adjustment needs of different impact heights.

[0046] In addition, the vertical rod 61 is marked with a scale line, and the scale line can be used to more conveniently and quickly adjust to the required impact height.

[0047] In a possible implementation, the center of the top of the impact ball 10 is provided with a vertical upward extending positioning pin 40, and the bottom surface of the electromagnetic suction member 70 is provided with a positioning hole matched with the positioning pin 40. In this way, the impact ball 10 and the electromagnetic suction member 70 can be quickly positioned, so that the electromagnetic suction member 70 can adsorb and fix the impact ball 10.

[0048] In a possible implementation, a buffer layer is attached to the inner wall of the test box 80, which is used to adsorb the impact force of the impact ball 10 and the generated noise. It should be noted that the buffer layer can be a foam layer, which can be blocked by the inner wall of the test box 80 after the impact ball 10 impacts the test sample 100. At this time, the buffer layer attached to the inner wall of the test box 80 can play a certain buffering role, absorb part of the impact force, and also can well reduce the generation of noise.

[0049] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and a number of modifications and improvements can be made, which all belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application should belong to the scope of the claims of the present application.

Claims

1. A falling ball impact testing device, characterized in that, The device includes an accelerometer and an impact ball for impacting a sample. The impact ball comprises a detachably connected upper ball and a lower ball. A mounting groove is provided at the center of the lower ball, and the accelerometer is installed in the mounting groove. A cavity communicating with the mounting groove is provided inside the upper ball, and a wire hole communicating with the cavity is provided at the top of the upper ball. The wire hole is used for a wire to pass through and extend along the cavity into the mounting groove to electrically connect with the accelerometer.

2. The falling ball impact testing apparatus according to claim 1, characterized in that, The surfaces of the upper sphere and the lower sphere facing each other are planar, and a first connecting hole is formed on the surface of the upper sphere near the lower sphere, and a second connecting hole adapted to the first connecting hole is formed on the surface of the lower sphere near the upper sphere; and / or, The diameter of the threading hole is larger than the diameter of the wire.

3. The falling ball impact testing apparatus according to claim 2, characterized in that, It also includes a pressure plate, which is fixed in the mounting groove, and the acceleration sensor is fixedly connected to the pressure plate.

4. The falling ball impact testing apparatus according to claim 1, characterized in that, It also includes a display and a data acquisition unit, the data acquisition unit being electrically connected to the acceleration sensor via the wire, and the display being electrically connected to the data acquisition unit.

5. The falling ball impact testing apparatus according to claim 1, characterized in that, It also includes a height frame and an electromagnetic suction device. The height frame includes a vertical rod and a horizontal rod movably connected to the vertical rod. The horizontal rod extends in a direction perpendicular to the vertical rod. The electromagnetic suction device is fixed to the end of the horizontal rod away from the vertical rod and is used to attract the impact ball.

6. The falling ball impact testing apparatus according to claim 4, characterized in that, The impact ball has a vertically upward-extending positioning pin at the center of its top, and the bottom surface of the electromagnetic suction component has a positioning hole that matches the positioning pin.

7. The falling ball impact testing apparatus according to claim 5, characterized in that, It also includes a test chamber and a fixture. The test chamber is located below the crossbar, and the top of the test chamber has an opening for the impact ball to fall into it. The fixture is fixed inside the test chamber and located directly below the electromagnetic suction device. The fixture is used to fix the specimen to be impacted.

8. The falling ball impact testing apparatus according to claim 7, characterized in that, The bottom plate of the test chamber has a first mounting hole, and the tooling has a second mounting hole that matches the first mounting hole.

9. The falling ball impact testing apparatus according to claim 7, characterized in that, The inner walls of the test chamber are all covered with a buffer layer, which is used to absorb the impact force of the impact ball and the noise generated.

10. The falling ball impact testing apparatus according to claim 5, characterized in that, The vertical rod is marked with scale lines.

Images