A metal pendulum impact testing machine

Abstract

This utility model relates to a metal pendulum impact testing machine, comprising a housing, a pendulum assembly, a pendulum actuation assembly, and a sample fixing assembly. The pendulum assembly includes a pendulum, a pendulum shaft, and a rotary encoder. The pendulum shaft is fixedly connected to the end of the pendulum's handle, and both ends of the pendulum shaft are hinged to the top wall of the housing. The input end of the rotary encoder is connected to the pendulum shaft. The pendulum actuation assembly includes a bracket, a lead screw module, and an electric telescopic rod. The bracket corresponds to the position of the pendulum and is located on the bottom wall of the housing. The lead screw module is mounted on the bracket, and the electric telescopic rod is mounted on the slider of the lead screw module. The sample fixing assembly is located on the bottom wall of the housing and corresponds to the swing position of the pendulum's head. This solution replaces the drive mechanism with the pendulum actuation assembly, which is not connected to the pendulum shaft and drives the pendulum from the middle of the handle. The force on the pendulum bearing is reduced, making it less prone to damage. Even if it is damaged and needs to be replaced, the pendulum head can be fixed with a wooden block, and the rotary encoder can be removed to replace the pendulum shaft.

Description

Technical Field

[0001] This utility model relates to the field of measuring instrument technology, and in particular to a metal pendulum impact testing machine. Background Technology

[0002] The metal pendulum impact tester is a specialized testing device used to determine the impact toughness of metallic materials. It is widely used in materials science, machinery manufacturing, aerospace, automotive industry and other fields. Its core function is to evaluate the material's ability to resist impact damage by simulating the stress state of the material under high-speed impact load, and to provide key data for material selection, product quality control and safety design.

[0003] Existing metal pendulum impact testing machines, such as the one with patent document number CN218067369U, have a pendulum shaft connected to the keyway end of the pendulum hammer handle, and a pendulum shaft connected to the drive assembly via a clutch. Each time an impact test is performed, the clutch is first engaged, and the drive assembly (assembled from a motor and reducer) causes the pendulum shaft to rotate. When the hammer head of the pendulum rotates to a specified height in the circumferential direction, the clutch is disengaged, the connection between the drive assembly and the pendulum shaft is interrupted, and the pendulum is released to impact the sample. Because the hammer head is quite heavy, typically weighing several kilograms to tens of kilograms, and the hammer handle is also of a certain length, the drive assembly drives the pendulum to rise via the rotation of the pendulum shaft. At this time, the pendulum shaft will bear a large axial rotational torque, and when the pendulum impacts the sample, the pendulum shaft will also bear a large impact energy. Therefore, the pendulum shaft bears a large load during the metal pendulum impact test, which can easily cause irreversible deformation or even cracks, leading to abnormal noises during equipment operation. During maintenance, it is necessary to first disassemble the drive assembly, then disassemble the clutch, and finally remove and replace the pendulum shaft. In order to stably raise the pendulum, the drive assembly needs to provide a large safety factor, resulting in a relatively heavy drive assembly. Replacing the pendulum shaft requires the cooperation of multiple people, making the disassembly and replacement process quite troublesome. Utility Model Content

[0004] The purpose of this invention is to provide a metal pendulum impact test to solve the above-mentioned problems existing in the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A metal pendulum impact testing machine includes a housing, a pendulum assembly, a pendulum actuation assembly, and a sample fixing assembly. The pendulum assembly includes a pendulum, a pendulum shaft, and a rotary encoder. The pendulum shaft is fixedly connected to the end of the pendulum's handle. The two ends of the pendulum shaft are hinged to the top wall of the housing. The input end of the rotary encoder is connected to the pendulum shaft. The pendulum actuation assembly includes a bracket, a lead screw module, and an electric telescopic rod. The bracket corresponds to the position of the pendulum and is located on the bottom wall of the housing. The lead screw module is mounted on the bracket, and the electric telescopic rod is mounted on the slider of the lead screw module. The sample fixing assembly is located on the bottom wall of the housing and corresponds to the swing position of the pendulum head.

[0006] The beneficial effects of this utility model are as follows: In use, the pendulum is in the initial position, the electric telescopic rod extends, and the lead screw module drives the electric telescopic rod to move laterally towards the pendulum. The electric telescopic rod abuts against one side of the hammer handle, causing the pendulum to rotate along the pendulum axis. After the pendulum rotates to the designated position, the electric telescopic rod retracts, removing its contact with the hammer handle. The hammer handle, without support, swings freely, thus completing the metal impact test on the sample fixing assembly. This solution replaces the drive mechanism with a pendulum actuation assembly, which is not connected to the pendulum axis and drives the pendulum from the middle of the hammer handle. The force on the pendulum bearing is reduced, making it less prone to damage. Even if it is damaged and needs to be replaced, the pendulum head can be fixed with a wooden block, the rotary encoder can be removed, and the pendulum axis can be replaced. This process can be completed by only one person, effectively improving maintenance efficiency.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the sample fixing assembly includes two sets of guard plates, a fixing block, a movable block, a mounting block, a top rod, and a handle; the two sets of guard plates are located on both sides of the hammer head and are installed on the bottom wall of the housing. The bottom wall of the housing is located between the two sets of guard plates and the fixing block and the mounting block are installed in sequence. The top rod passes through the mounting block and is threadedly connected to the mounting block. One end of the top rod near the fixing block is fixedly connected to the movable block, and the other end is provided with a handle.

[0009] Furthermore, the handle's circumferential surface is textured.

[0010] Furthermore, a limiting rod is provided on the side of the movable block opposite to the fixed block, and a limiting hole is provided on the fixed block corresponding to the limiting rod.

[0011] Furthermore, the rotary encoder is an absolute rotary encoder.

[0012] Furthermore, a brake is installed on the swing shaft. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the fixture part of this utility model.

[0014] The attached diagram lists the components represented by each number as follows: 1. Housing; 2. Pendulum assembly; 21. Pendulum; 211. Hammer handle; 212. Hammer head; 22. Pendulum shaft; 23. Rotary encoder; 3. Pendulum actuation assembly; 31. Bracket; 32. Lead screw module; 321. Slider; 33. Electric telescopic rod; 4. Sample fixing assembly; 41. Protective plate; 42. Fixing block; 421. Limiting hole; 43. Movable block; 431. Limiting rod; 432. Round hole; 44. Mounting block; 45. Top rod; 451. Cylindrical protrusion; 452. Mounting ring; 46. Handle; 5. Brake. Detailed Implementation

[0015] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0016] Example 1 like Figures 1 to 3 As shown, a metal pendulum impact testing machine includes a housing 1, a pendulum assembly 2, a pendulum actuation assembly 3, and a sample fixing assembly 4. The pendulum assembly 2 includes a pendulum 21, a pendulum shaft 22, and a rotary encoder 23. The pendulum shaft 22 is fixedly connected to the end of the hammer handle 211 of the pendulum 21. The two ends of the pendulum shaft 22 are hinged to the top wall of the housing 1. The input end of the rotary encoder 23 is connected to the pendulum shaft 22. The pendulum actuation assembly 3 includes a bracket 31, a lead screw module 32, and an electric telescopic rod 33. The bracket 31 corresponds to the position of the pendulum 21 and is located on the bottom wall of the housing 1. The lead screw module 32 is mounted on the bracket 31, and the electric telescopic rod 33 is mounted on the slider 321 of the lead screw module 32. The sample fixing assembly 4 is located on the bottom wall of the housing 1 and corresponds to the swing position of the hammer head 212 of the pendulum 21.

[0017] In use, the pendulum 21 is in its initial position, the electric telescopic rod 33 extends, and the lead screw module 32 drives the electric telescopic rod 33 to move laterally toward the pendulum 21. The electric telescopic rod 33 abuts against one side of the hammer handle 211, causing the pendulum 21 to rotate along the pendulum axis 22. After the pendulum 21 rotates to the designated position, the electric telescopic rod 33 retracts, removing its contact with the hammer handle 211. The hammer handle 211 then swings freely without support, thus completing the metal impact test on the sample fixing assembly 4. In this scheme, the drive mechanism is replaced by the pendulum actuation assembly 3, which is not connected to the pendulum axis 22 and drives the pendulum 21 from the middle of the hammer handle 211. The force on the pendulum axis 22 is reduced, making it less prone to damage. Even if it is damaged and needs to be replaced, the hammer head 212 of the pendulum 21 is fixed with a wooden block, and the rotary encoder 23 is removed to replace the pendulum axis 22. This process can be completed by one person, effectively improving maintenance efficiency.

[0018] Example 2 This embodiment is a further improvement on embodiment 1, as detailed below: The sample fixing assembly 4 includes two sets of guard plates 41, a fixing block 42, a movable block 43, a mounting block 44, a top rod 45, and a handle 46. The two sets of guard plates 41 are located on both sides of the hammer head 212 and are installed on the bottom wall of the housing 1. The bottom wall of the housing 1 is located between the two sets of guard plates 41 and the fixing block 42 and the mounting block 44 are installed in sequence. The top rod 45 passes through the mounting block 44 and is threadedly connected to the mounting block 44. One end of the top rod 45 near the fixing block 42 is fixedly connected to the movable block 43, and the other end is provided with a handle 46.

[0019] By rotating the top rod 45 through the handle 46, the top rod 45 pushes the movable block 43, which moves towards the fixed block 42, thus fixing the sample and conducting an impact test. By setting the guard plate 41, the broken sample can be made to splash along the direction of the pendulum swing, thereby protecting the surrounding structure.

[0020] In specific implementation, the movable block 43 has a circular hole 432 on the side corresponding to the push rod 45. The push rod 45 has a cylindrical protrusion 451 at the end near the slider. The cylindrical protrusion 451 has a mounting ring 452 at the end away from the movable block 43. The outer wall of the mounting ring 452 has an external thread, and the corresponding part of the inner wall of the circular hole 432 has an internal thread. The cylindrical protrusion 451 can rotate in the circular hole 432. At the same time, the mounting ring 452 restricts the cylindrical protrusion 451, so that the cylindrical protrusion 451 can engage with the movable block 43 while rotating in the circular hole 432.

[0021] The handle 46 has textured surfaces on its circumference; the textured surfaces increase friction, making it easier to operate the handle 46 to rotate the top rod 45 and push the movable block 43 to clamp the sample.

[0022] A limiting rod 431 is provided on the side of the movable block 43 opposite to the fixed block 42, and a limiting hole 421 is provided on the fixed block 42 corresponding to the limiting rod 431; the cooperation between the limiting rod 431 and the limiting hole 421 further improves the stability of the fixing component 4 in fixing the sample.

[0023] Example 3 This embodiment is a further improvement on embodiment 1, as detailed below: The rotary encoder 23 is an absolute rotary encoder; it can accurately record the rotation position and will not lose the origin after power failure, which can eliminate the origin verification step after power-on and further improve the ease of use of the equipment.

[0024] Example 4 This embodiment is a further improvement on embodiment 1, as detailed below: A brake 5 is installed on the pendulum shaft 22. After the impact test is completed, the pendulum will continue to swing back and forth. By applying braking force to the pendulum shaft 22 through the brake 5, the pendulum can stop faster, shorten the waiting time, and effectively improve the experimental efficiency.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A metal pendulum impact testing machine, characterized in that, The device includes a housing (1), a pendulum assembly (2), a pendulum actuation assembly (3), and a sample fixing assembly (4). The pendulum assembly (2) includes a pendulum (21), a pendulum shaft (22), and a rotary encoder (23). The pendulum shaft (22) is fixedly connected to the end of the hammer handle (211) of the pendulum (21). The two ends of the pendulum shaft (22) are hinged to the top wall of the housing (1). The input end of the rotary encoder (23) is connected to the pendulum shaft (22). The pendulum actuation assembly (3) includes a bracket (31), a lead screw module (32), and an electric telescopic rod (33). The bracket (31) is positioned corresponding to the pendulum (21) and is located on the bottom wall of the housing (1). The lead screw module (32) is mounted on the bracket (31), and the electric telescopic rod (33) is mounted on the slider (321) of the lead screw module (32). The sample fixing assembly (4) is located on the bottom wall of the housing (1) and corresponds to the swing position of the hammer head (212) of the pendulum (21).

2. The metal pendulum impact testing machine according to claim 1, characterized in that, The sample fixing assembly (4) includes two sets of guard plates (41), a fixing block (42), a movable block (43), a mounting block (44), a top rod (45), and a handle (46). The two sets of guard plates (41) are located on both sides of the hammer head (212) and are installed on the bottom wall of the housing (1). The bottom wall of the housing (1) is located between the two sets of guard plates (41) and the fixing block (42) and the mounting block (44) are installed in sequence. The top rod (45) passes through the mounting block (44) and is threadedly connected to the mounting block (44). One end of the top rod (45) near the fixing block (42) is fixedly connected to the movable block (43), and the other end is provided with the handle (46).

3. The metal pendulum impact testing machine according to claim 2, characterized in that, The handle (46) has a textured surface on its circumference.

4. The metal pendulum impact testing machine according to claim 3, characterized in that, The movable block (43) is provided with a limiting rod (431) on the side opposite to the fixed block (42), and the fixed block (42) is provided with a limiting hole (421) corresponding to the limiting rod (431).

5. The metal pendulum impact testing machine according to claim 1, characterized in that, The rotary encoder (23) is an absolute rotary encoder.

6. The metal pendulum impact testing machine according to claim 1, characterized in that, A brake (5) is installed on the swing shaft (22).

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