An impact testing device

Abstract

The utility model discloses an impact test device belongs to mechanical performance test equipment technical field, and the device includes organism, fixed establishment and impact mechanism. The fixed establishment includes impact frame, electric jar, push frame, inner shaft, side frame, connecting frame, inner chute and pressure plate. When working, electric jar drives push frame movement, through the cooperation of inner shaft, side frame and connecting frame, makes connecting frame along inner chute slide to drive pressure plate removal to automatic clamping test piece. The impact mechanism includes guide column, slide and impact hammer, is used for exerting impact to test piece. The utility model discloses a linkage clamping structure by electric jar drive, solved the problem of the prior art in the clamping force not easy control, the degree of automation is low, and test piece is easy to damage, realized the automatic accurate clamping of test piece, and the structure is stable, and the clamping force is controllable, and the efficiency of impact test and the reliability of result have been improved significantly.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical performance testing equipment, and in particular to an impact testing device. Background Technology

[0002] Impact testing equipment is a key tool in industrial production and scientific research used to evaluate the impact resistance of materials, components, or product structures. Its basic principle is to apply an instantaneous impact load to the specimen to determine its mechanical behavior under impact. Throughout the testing process, the accuracy and reliability of the test results are the core indicators for evaluating the equipment's performance.

[0003] To ensure that the impact energy is fully and effectively applied to the specimen and that accurate and valid data is obtained at the moment of impact, the specimen must be securely and reliably fixed. Any minute displacement, vibration, or slippage of the specimen at the moment of impact will lead to the dissipation of impact energy, distorting the test results and rendering them unreliable.

[0004] However, some existing impact testing devices have shortcomings in specimen fixation. Many devices still use manual screw clamping or simple pneumatic clamping methods. Manual clamping is not only inefficient and labor-intensive, but the control of clamping force also depends entirely on the operator's experience, making it difficult to ensure that the clamping force remains consistent for each test, resulting in poor repeatability of test conditions. While simple pneumatic clamping mechanisms achieve semi-automation, they often lack precise pressure feedback and adjustment mechanisms. When dealing with specimens of different stiffness or those that are fragile, they are prone to situations where excessive clamping force leads to specimen damage, or insufficient clamping force leads to insecure fixation.

[0005] Therefore, this utility model proposes an impact testing device to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides an impact testing device, which aims to improve the problems of inaccurate control of the clamping force on the specimen, low degree of automation, and easy displacement of the specimen due to insecure fixing or damage due to excessive clamping in the impact process, thereby affecting the accuracy of the test results.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an impact testing device, comprising: a body, a fixing mechanism, and an impact mechanism; the fixing mechanism includes an impact frame for placing a test specimen; the impact mechanism includes a guide column arranged in a vertical direction, a slide connected to the guide column, and an impact hammer fixedly connected to the bottom of the slide; the fixing mechanism further includes an electric cylinder, a push frame, an inner shaft, a side frame, an inner inclined groove, a connecting frame, and a pressure plate.

[0008] The push frame is fixedly connected to the inner shaft, the inner shaft is rotatably connected to the side frame, and the side frame is rotatably connected to the connecting frame.

[0009] The electric cylinder is connected to the push frame for transmission. The inner inclined groove is opened on the impact frame. The connecting frame is slidably fitted to the inner inclined groove. The pressure plate is fixedly connected to the connecting frame. The entire linkage mechanism is driven by the electric cylinder, which enables the pressure plate to move laterally to clamp or release the specimen.

[0010] Preferably, the fixing mechanism further includes a side frame and a connecting platform, the side frame and the connecting platform being disposed opposite to each other on both sides of the impact frame.

[0011] Preferably, the fixing mechanism further includes a guide rail for guiding the pusher to make linear motion, and the pusher is slidably connected to the guide rail.

[0012] Preferably, the extension direction of the inner inclined groove forms a preset angle with the lateral movement direction of the pressure plate.

[0013] Preferably, the impact mechanism further includes a locking chain that is connected to the carriage drive, the locking chain being used to drive the carriage to rise along the guide post to a preset height.

[0014] Preferably, the impact mechanism further includes a release device for unlocking the carriage after it reaches a preset height, allowing the carriage and the impact hammer to fall freely along the guide post.

[0015] Preferably, the falling path of the impact hammer is vertically aligned with the area within the impact frame used to place the specimen.

[0016] Preferably, the impact testing device further includes a control panel, which is mounted on the body and electrically connected to the electric cylinder and the impact mechanism.

[0017] This utility model has the following beneficial effects: 1. In this utility model, by setting a clamping structure driven by an electric cylinder and cooperating with a push frame, inner shaft, side frame, connecting frame and inner inclined groove, the problems of cumbersome operation, difficulty in precise control of clamping force, easy damage to the specimen or unstable fixation of the impact testing device in the prior art are solved. It achieves the effect of automatic and precise clamping of the specimen, controllable and stable clamping force, and improves the efficiency of test preparation and test accuracy.

[0018] 2. In this utility model, by integrating the automatic clamping fixing mechanism and the automatic lifting impact mechanism, and coordinating them with a unified control panel, the problems of step-by-step operation, low automation, and low test efficiency in the existing technology are solved. This achieves the effect of automated test process, convenient operation, good repeatability, and significantly improved overall impact test efficiency.

[0019] 3. This utility model, by setting guide columns to accurately guide the falling trajectory of the impact hammer and using the inner inclined groove structure to achieve stable lateral clamping, solves the problem of inaccurate test data caused by impact offset or displacement of the specimen at the moment of impact in the prior art. It achieves the technical effect of stable overall structure of device, accurate impact positioning, and stable clamping process, thereby effectively ensuring the reliability of impact test results. Attached Figure Description

[0020] Figure 1 This is a perspective view of an impact testing device proposed in this utility model; Figure 2 This is a schematic diagram of the impact frame of an impact testing device proposed in this utility model; Figure 3 This is a schematic diagram of the fixing mechanism of an impact testing device proposed in this utility model; Figure 4 This is a schematic diagram of the impact mechanism of an impact testing device proposed in this utility model.

[0021] Legend: 1. Body; 101. Control panel; 2. Fixing mechanism; 201. Impact frame; 202. Side frame; 203. Connecting platform; 204. Electric cylinder; 205. Push frame; 206. Inner shaft; 207. Side frame; 208. Connecting frame; 209. Inner inclined groove; 210. Pressure plate; 3. Impact mechanism; 301. Guide column; 302. Release device; 303. Slide; 304. Locking chain; 305. Impact hammer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1-3The present invention provides an embodiment of an impact testing device, which aims to solve the problem that existing impact testing devices are not easy to control precisely when fixing the specimen, and have a low degree of automation, which can easily lead to the specimen loosening or being damaged due to excessive clamping during the impact process.

[0024] The impact testing device includes a body 1, a fixing mechanism 2 and an impact mechanism 3 mounted on the body 1. The body 1 serves as the mounting base for the entire device, providing a stable mounting reference for the fixing mechanism 2 and the impact mechanism 3. A control panel 101 is also mounted on the body 1. The control panel 101 is electrically connected to the electric cylinder 204 of the fixing mechanism 2 and the impact mechanism 3. The fixing mechanism 2 includes an impact frame 201 for placing the specimen. The fixing mechanism 2 also includes an electric cylinder 204, a pusher 205, an inner shaft 206, a side frame 207, a connecting frame 208, an inner inclined groove 209, and a pressure plate 210. The output end of the electric cylinder 204 is connected to the pusher 205 for transmission. The pusher 205 is fixedly connected to the inner shaft 206. 6 is rotatably connected to the side frame 207, and the side frame 207 is rotatably connected to the connecting frame 208. The inner inclined groove 209 is opened on the impact frame 201, and the connecting frame 208 is slidably fitted in the inner inclined groove 209. The pressure plate 210 is fixedly connected to the connecting frame 208 and faces the inside of the impact frame 201. When the electric cylinder 204 drives the push frame 205 to move, the inner shaft 206 drives the side frame 207 to swing, and the side frame 207 drives the connecting frame 208 to slide along the guide trajectory of the inner inclined groove 209, thereby causing the pressure plate 210 to move laterally inside the impact frame 201. In order to ensure the smoothness of the movement of the push frame 205, the fixing mechanism 2 also includes a guide rail for guiding the push frame 205 to make linear movements, and the push frame 205 is slidably connected to the guide rail. Furthermore, the fixing mechanism 2 also includes a side frame 202 and a connecting platform 203. The side frame 202 and the connecting platform 203 are arranged opposite to each other on both sides of the impact frame 201 to initially restrict the lateral displacement of the specimen placed in the impact frame 201. The extension direction of the inner inclined groove 209 forms a preset angle with the lateral movement direction of the pressure plate 210. By adjusting this angle, the linear motion of the push frame 205 can be effectively converted into the lateral clamping motion of the pressure plate 210. The impact mechanism 3 has a guide post 301 arranged vertically, with its lower end fixedly connected to the body 1 and its upper end fixedly connected to a release device 302. The impact mechanism 3 also has a slide 303, which has a through hole that matches the shape of the guide post 301. In the assembled state, the slide 303 is slidably connected to the outer periphery of the guide post 301 through the through hole. This sliding fit structure between the guide post and the slide ensures the high stability and directional accuracy of the slide 303 during its movement along the guide post 301. The impact mechanism 3 also includes an impact hammer 305, which is fixedly connected to the bottom of the slide 303. Its falling path is vertically aligned with the area inside the impact frame 201 used to place the test specimen to ensure the accuracy of the impact.

[0025] Meanwhile, in order to drive the slide 303 and the impact hammer 305 to rise, the impact mechanism 3 is also provided with a locking chain 304. One end of the locking chain 304 is connected to the slide 303, and the other end is connected to a drive motor (not shown). By driving the locking chain 304 to move through the drive motor, the slide 303 can be driven to rise smoothly along the guide post 301 to the preset height. When the slide 303 reaches the preset height, the release device 302 locks and unlocks it. The specific internal structure of the release device 302 can be implemented by various conventional methods such as an electromagnetic release device, which is a well-known technology in the field and will not be described in detail here.

[0026] To further improve the clamping stability and adaptability of the fixing mechanism 2, the side frame 202 is fixedly connected to one side of the impact frame 201, while the connecting platform 203 is linked to or independently adjustable with the motion mechanism of the pressure plate 210, thereby adapting to specimens of different sizes; to ensure the accuracy of the movement of the push frame 205, the guide rail used to guide the push frame 205 to make linear motion is preferably a high-precision linear slide rail assembly. The assembly includes a guide rail body fixed on the impact frame 201 and a slider that slides and engages with the guide rail body. The push frame 205 is fixedly connected to the slider.

[0027] To achieve precise control of impact energy, the release device 302 of the impact mechanism 3 is preferably an electromagnetic release device, which is electrically connected to the control panel 101 and used to lock or instantly release the slide 303; the locking chain 304 is hinged to the upper part of the slide 303 through a connector, ensuring the flexibility and reliability of the lifting process; to ensure the accuracy of the impact point, the bottom of the impact frame 201 is provided with a center positioning mark corresponding to the impact end of the impact hammer 305.

[0028] To achieve automated closed-loop control, the control panel 101 is a touch screen terminal with a programmable logic controller (PLC), and the electric cylinder 204 is a servo electric cylinder with a built-in pressure sensor. The pressure sensor feeds back the clamping pressure signal monitored in real time to the control panel 101, and the control panel 101 precisely adjusts the output force of the electric cylinder 204 according to the preset value.

[0029] Working principle: First, the test piece is fixed by placing it inside the impact frame 201 of the fixing mechanism 2, and initially limiting its position through the side frame 202 and connecting platform 203. After the operator issues a fixing command through the control panel 101, the electric cylinder 204 is energized and drives the pusher 205 to move along the guide rail. The pusher 205, through its fixed connection with the inner shaft 206, drives the inner shaft 206 to move synchronously. The inner shaft 206, in turn, through its rotatable connection with the side frame 207, drives the side frame 207 to swing. The side frame 207, in turn, through its connection with the connecting frame 208... The rotating connection pushes the connecting frame 208. Since the connecting frame 208 is slidably fitted in the inner inclined groove 209 opened on the impact frame 201, the connecting frame 208 will slide along the guide trajectory of the inner inclined groove 209 under the push of the side frame 207. This sliding action makes the pressure plate 210 fixedly connected to the connecting frame 208 move smoothly towards the specimen until it is tightly attached to and clamps the specimen. Through the feedback of the pressure sensor built into the electric cylinder 204, the clamping force can be precisely controlled, thereby solving the problem of specimen damage or insecure fixation caused by improper clamping force in the prior art.

[0030] After the specimen is fixed, the impact preparation stage begins. The impact height is set via the control panel 101 and a lifting command is issued. The locking chain 304 moves under the drive of a drive motor (not shown) and, through its transmission connection with the slide 303, drives the slide 303 to slide steadily upward along the guide post 301. The impact hammer 305, fixed to the bottom of the slide 303, also rises synchronously to the preset height. After reaching the preset height, the release device 302 locks the slide 303 to ensure that the impact hammer 305 remains stable. After confirming that all parameters are correct, the impact command is issued via the control panel 101. The release device 302 releases the lock on the slide 303, and the slide 303 and impact hammer 305 fall vertically along the guide post 301 under the action of gravity, accurately impacting the specimen in the impact frame 201. After the test, the locking chain 304 can pull the slide 303 and impact hammer 305 back to their original positions.

Claims

1. An impact testing apparatus, comprising: The machine body (1); a fixing mechanism (2) mounted on the machine body (1), the fixing mechanism (2) including an impact frame (201) for placing the test specimen; an impact mechanism (3) mounted on the machine body (1), the impact mechanism (3) including a guide post (301) arranged in a vertical direction, a slide (303) slidably connected to the guide post (301), and an impact hammer (305) fixedly connected to the bottom of the slide (303), characterized in that: The fixing mechanism (2) further includes an electric cylinder (204), a pusher (205) that is connected to the output end of the electric cylinder (204), an inner shaft (206) that is fixedly connected to the pusher (205), and a side frame (207) that is rotatably connected to the inner shaft (206). The fixing mechanism (2) further includes an inner inclined groove (209) opened on the impact frame (201), a connecting frame (208) rotatably connected to the side frame (207) and slidably fitted in the inner inclined groove (209), and a pressure plate (210) fixedly connected to the connecting frame (208) and facing the inside of the impact frame (201). When the electric cylinder (204) drives the pusher (205) to move, the inner shaft (206) drives the side frame (207) to swing, and the side frame (207) drives the connecting frame (208) to slide along the guide trajectory of the inner inclined groove (209), thereby causing the pressure plate (210) to move laterally within the impact frame (201).

2. The impact testing apparatus according to claim 1, characterized in that, The fixing mechanism (2) also includes a side frame (202) and a connecting platform (203). The side frame (202) and the connecting platform (203) are arranged opposite to each other on both sides of the impact frame (201) to perform preliminary lateral displacement restriction on the specimen.

3. The impact testing apparatus according to claim 1, characterized in that, The fixing mechanism (2) also includes a guide rail for guiding the pusher (205) to make linear motion, and the pusher (205) is slidably connected to the guide rail.

4. The impact testing apparatus according to claim 1, characterized in that, The extension direction of the inner inclined groove (209) forms a preset angle with the lateral movement direction of the pressure plate (210).

5. The impact testing apparatus according to claim 1, characterized in that, The impact mechanism (3) also includes a locking chain (304) that is connected to the slide (303) for driving the slide (303) to rise to a preset height along the guide post (301).

6. The impact testing apparatus according to claim 5, characterized in that, The impact mechanism (3) also includes a release device (302), which is used to unlock the slide (303) after it reaches the preset height, so that the slide (303) and the impact hammer (305) fall freely along the guide post (301).

7. The impact testing apparatus according to claim 1, characterized in that, The falling path of the impact hammer (305) is vertically aligned with the area within the impact frame (201) used to place the specimen.

8. The impact testing apparatus according to claim 1, characterized in that, It also includes a control panel (101), which is mounted on the body (1) and electrically connected to the electric cylinder (204) and the impact mechanism (3).

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