Positioning device for drop hammer type testing machine
By setting up a bidirectional screw-driven positioning plate on the workbench of the hammer-type tester, the positioning of the sample is solved, and the problem of test position deviation caused by sample sliding is improved, the test accuracy is reduced and safety risks are reduced.
Patent Information
- Application Number
- CN202421561607.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the test process of the hammer-type test machine, the sample may slide, causing the position of the hammer-impacting sample to deviate from the predetermined position, affecting the test effect.
A positioning device is designed, including a bidirectional screw that provides a storage plate, a sliding positioning plate and a driving positioning plate on the workbench. The bidirectional screw drives the positioning plate to tighten the two ends of the sample to realize the positioning of the sample, and place the sample outside the frame through the sliding structure of the workbench to reduce safety risks.
It effectively reduces the possibility of the sample sliding during the test, improves the accuracy of the test results, and reduces safety risks.
Smart Images
Figure CN222994136U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of test equipment, and particularly to a positioning device for a drop hammer testing machine. Background Art
[0002] A drop hammer testing machine is a device used to test the mechanical properties and impact resistance of materials under impact loads, and it is usually used for impact tests of materials such as metals, non-metals, and composite materials.
[0003] Referring to Figure 1 , a drop hammer testing machine generally includes a frame 1, a workbench 2 for placing samples is provided on the frame 1, a drop hammer is provided above the workbench 2, and a lifting mechanism for lifting the drop hammer is provided. The lifting mechanism and the drop hammer are fixed by an electromagnetic chuck. During the test, first, the drop hammer is magnetically attracted to the lifting mechanism, then the drop hammer is lifted to a certain height by the lifting mechanism, then the sample is placed on the workbench 2, the drop hammer is released, and the drop hammer freely falls to impact the sample. By observing the damage condition of the sample and setting sensors on the drop hammer to measure and record parameters such as impact force and displacement, the impact performance and impact resistance of the material can be obtained.
[0004] In view of the above related technologies, when the sample is directly placed on the workbench, during the test, the sample may slide, resulting in a deviation between the position where the drop hammer impacts the sample and the predetermined position, thereby affecting the test effect. Utility Model Content
[0005] In order to reduce the possibility of sample sliding during the test and improve the test accuracy, the present application provides a positioning device for a drop hammer testing machine.
[0006] The present application provides a positioning device for a drop hammer testing machine, adopting the following technical solutions:
[0007] A positioning device for a drop hammer testing machine includes a frame, and further includes a workbench provided on the frame. The workbench includes a placing plate for placing samples, positioning plates slidably provided at both ends of the placing plate, and a first driving member for driving the two positioning plates to slide towards each other or away from each other.
[0008] By adopting the above technical solutions, the sample is placed on the placing plate, and then the two positioning plates are driven to approach the sample and press against both ends of the sample, so as to be able to position the sample and reduce the possibility of sample sliding during the test.
[0009] Optionally, a placing groove is formed on the upper surface of the placing plate, and the placing groove is in a flared shape opening upwards.
[0010] By adopting the above technical solution, when the sample is placed on the placement plate, it can fall along the placement groove towards the center of the placement plate, that is, the position of the sample can be preliminarily positioned through the placement groove.
[0011] Optionally, sliding grooves for the two positioning plates to slide are respectively formed on both sides of the placement plate on the workbench. A guide rod is arranged inside the workbench, and the guide rod sequentially slides through the two positioning plates. The length direction of the guide rod is parallel to the sliding direction of the positioning plates.
[0012] By adopting the above technical solution, the guide rod can guide the sliding of the positioning plates.
[0013] Optionally, the first driving member includes a bidirectional screw rod that rotatably passes through the placement plate. Both ends of the bidirectional screw rod respectively extend into the sliding grooves and threadedly pass through the two positioning plates. Positive threads and reverse threads with opposite threads are formed on the outer side walls of the parts of the bidirectional screw rod located in the two sliding grooves, and the two positioning plates are respectively threadedly connected to the positive threads and the reverse threads.
[0014] By adopting the above technical solution, when the bidirectional screw rod is rotated, the positioning plates can move along the length direction of the bidirectional screw rod through the threaded connection with the bidirectional screw rod and under the limit of the sliding grooves, and the two positioning plates can move closer to or away from each other simultaneously.
[0015] Optionally, the first driving member further includes a grip. One end of the bidirectional screw rod passes through the workbench in a direction away from the placement plate and is connected to the grip.
[0016] By adopting the above technical solution, rotating the grip can drive the bidirectional screw rod to rotate.
[0017] Optionally, the positioning device further includes a guide rail arranged on the frame, a slider slidably arranged on the guide rail, and a second driving member for driving the slider to slide along the length direction of the guide rail. The guide rail is arranged horizontally, and the workbench is connected to the slider.
[0018] By adopting the above technical solution, the second driving member drives the slider to slide along the guide rail, so that the workbench can slide out of the frame, which is convenient for placing the sample on the placement plate. At the same time, it avoids directly putting the hand under the falling hammer inside the frame, reducing potential safety hazards.
[0019] Optionally, a limiting portion is arranged at one end of the guide rail facing the slider, and a limiting groove for the limiting portion to slide is formed on the slider. When the limiting portion slides in the limiting groove, the slider is restricted from sliding in a direction away from the guide rail.
[0020] Optionally, two guide rails are arranged in parallel, and two sliders are arranged on the workbench corresponding to the guide rails.
[0021] By adopting the above technical solution, the stability of the slider and the workbench during sliding can be improved.
[0022] Optionally, the second driving member includes a motor arranged on the frame, a gear coaxially sleeved on the output end of the motor, and a rack arranged on the workbench. The gear meshes with the rack, and the length direction of the rack is parallel to the length direction of the workbench.
[0023] By adopting the above technical solution, when the motor is started, the output shaft of the motor drives the gear to rotate, and through the meshing of the gear and the rack, the workbench can be driven to slide.
[0024] In summary, the present application includes at least one of the following beneficial effects:
[0025] 1. By driving two positioning plates to abut against both ends of the sample through a bidirectional screw, the sample can be positioned, reducing the possibility of the sample moving during the test;
[0026] 2. By driving the workbench to slide along the guide rail through the second driving member, it is convenient to place the sample outside the frame, reducing potential safety hazards. Description of the Drawings
[0027] Figure 1 is a schematic structural diagram of the related art;
[0028] Figure 2 is a schematic structural diagram of an embodiment of the present application;
[0029] Figure 3 is a schematic structural diagram of the workbench;
[0030] Figure 4 is Figure 2 an enlarged schematic structural diagram of part A in
[0031] Description of the reference numerals: 1, frame; 2, workbench; 21, chute; 22, guide rod; 3, placement plate; 31, placement groove; 4, positioning plate; 5, first driving member; 51, bidirectional screw; 52, grip; 6, guide rail; 61, limiting portion; 7, slider; 71, limiting groove; 8, second driving member; 81, motor; 82, gear; 83, rack. Detailed Description of the Embodiment
[0032] The following will further describe the present application in detail with reference to the attached Figure 2-4 drawings.
[0033] An embodiment of the present application discloses a positioning device for a drop hammer testing machine. Refer to Figure 2, The positioning device includes a frame 1 and a workbench 2 disposed within the frame 1. The workbench 2 includes a placement board 3 for placing samples, positioning boards 4 slidably disposed at both ends of the placement board 3, and a first driving member 5 for driving the two positioning boards 4 to slide towards or away from each other; in a drop hammer testing machine, a drop hammer is disposed above the workbench 2. During the test, the sample is placed on the placement board 3, and the drop hammer freely falls to impact the sample, thereby completing the test of the sample; in this embodiment, when the sample is placed on the placement board 3, the first driving member 5 is used to drive the two positioning boards 4 to approach each other, so that the two positioning boards 4 respectively abut against the end faces at both ends of the sample to position the sample, and the possibility of the sample sliding can be reduced during the test process, so that the position where the drop hammer falls and impacts the sample is accurate, that is, the accuracy of the test result can be improved.
[0034] Refer to Figure 2 and Figure 3 , in this embodiment, specifically, the workbench 2 can be a cuboid, the placement board 3 is located in the middle part of the workbench 2, two sliding grooves 21 are opened along the length direction of the workbench 2, and the two sliding grooves 21 are respectively opened at both ends of the placement board 3. The two positioning boards 4 are respectively slidably disposed in the two sliding grooves 21; a placement groove 31 is opened on the upper surface of the placement board 3, and the placement groove 31 forms an upward flared shape, and the flare takes the center line of the placement board 3 as the lowest point and extends upward along both sides of the placement board 3 to form a V shape, so that the sample placed on the placement board 3 can fall along the placement groove 31 to the center line position of the placement board 3, that is, it can play a preliminary positioning role for the sample.
[0035] Refer to Figure 2 and Figure 3 , in this embodiment, the positioning board 4 is set as a rectangular board. Preferably, the upper end of the positioning board 4 extends upward and is higher than the upper surface of the placement board 3. A guide rod 22 is fixedly disposed within the workbench 2. The guide rod 22 can be a round rod. In other embodiments, the guide rod 22 can also be a rectangular rod or other shapes; the length direction of the guide rod 22 is parallel to the length direction of the workbench 2. The guide rod 22 passes through the placement board 3 and both ends of the guide rod 22 are fixed to the two side walls away from each other of the two sliding grooves 21. The guide rod 22 sequentially slides through the two positioning boards 4, so that when the positioning board 4 slides, the guide rod 22 can play a guiding role.
[0036] Refer to Figure 2 and Figure 3, in this embodiment, the first driving member 5 includes a bidirectional screw 51 and a grip 52. The length direction of the bidirectional screw 51 is parallel to the guide rod 22. The middle part of the bidirectional screw 51 passes through the placing plate 3 and can be rotatably connected to the placing plate 3 by means of bearings or the like. Both ends of the bidirectional screw 51 extend out of the placing plate 3, and positive threads and reverse threads with opposite threads are respectively provided on the outer side walls at both ends of the bidirectional screw 51. The two ends with positive threads and reverse threads respectively pass through two positioning plates 4 in a threaded manner. Thus, when the bidirectional screw 51 is rotated, the two positioning plates 4 can be driven to simultaneously approach and tightly hold the sample against each other, or slide in opposite directions to loosen the sample at the same time. By means of the bidirectional screw 51, the sample can be conveniently positioned at the central position. An opening for placing the sample is provided on one side of the frame 1. One end of the bidirectional screw 51 extends through the outer side wall of the workbench 2 towards the opening on the frame 1 and is fixedly connected to the grip 52. Thus, the bidirectional screw 51 can be rotated by the grip 52, thereby driving the two positioning plates 4 to slide.
[0037] Refer to Figure 2 and Figure 4 , optionally, in order to facilitate placing the sample, the workbench 2 can be further set as a sliding structure. Thus, when the sample needs to be placed, the workbench 2 can be slid out below the drop hammer. After placing the sample and tightly holding the sample by the positioning plate 4, the workbench 2 is then sent below the drop hammer. Specifically, the positioning device further includes a guide rail 6 provided on the frame 1, a slider 7 slidably arranged on the guide rail 6, and a second driving member 8 for driving the slider 7 to slide along the length direction of the guide rail 6.
[0038] Refer to Figure 2 and Figure 4 , in this embodiment, one end of the guide rail 6 is arranged inside the frame 1, and the other end extends outside the frame 1 towards the opening direction of the frame 1; the slider 7 can be a rectangular strip structure extending along the length direction of the workbench 2. The upper surface of the slider 7 is fixedly connected to the lower surface of the workbench 2 by means of bolts or the like. The lower surface of the slider 7 is slidably connected to the guide rail 6. Specifically, a limiting portion 61 is provided at the upper end of the guide rail 6. The cross-section of the limiting portion 61 can be "T"-shaped. In other embodiments, the cross-section of the limiting portion 61 can also be dovetail-shaped, etc.; a limiting groove 71 for the limiting portion 61 to slide is provided on the lower surface of the slider 7. The limiting groove 71 extends towards both ends of the slider 7 and penetrates through to the end face. Thus, through the cooperation of the limiting portion 61 and the limiting groove 71, the slider 7 can slide along the length direction of the guide rail 6, driving the workbench 2 to slide along the length direction of the guide rail 6. At the same time, the limiting portion 61 is clamped in the limiting groove 71, which can limit the slider 7 from disengaging from the guide rail 6 in other directions away from the guide rail 6.
[0039] Both ends of the guide rail 6 can be fixed with clamping blocks. When the slider 7 slides to the end of the guide rail 6, the clamping blocks can prevent the slider 7 from disengaging from the guide rail 6. To improve the sliding stability of the workbench 2, preferably, two guide rails 6 are arranged in parallel, and two sliders 7 are also fixed on the lower surface of the workbench 2. The two sliders 7 and the two guide rails 6 are arranged in one-to-one correspondence.
[0040] Referring to Figure 2 and Figure 4 , in this embodiment, the second driving member 8 includes a motor 81, a gear 82 and a rack 83. The motor 81 is fixed to the frame 1 by bolts or the like. The telescopic shaft of the motor 81 extends upward in the vertical direction. The gear 82 is coaxially fixed to the outer side wall of the upper end of the output shaft of the motor 81. The upper surface of the rack 83 is fixed to the lower surface of the workbench 2. Preferably, the rack 83 can be arranged between the two sliders 7. The length direction of the rack 83 is parallel to the length direction of the workbench 2. Teeth are provided on one side wall of the rack 83 along its length direction, and the teeth of the rack 83 are engaged with the gear 82. Thus, when the motor 81 is started, the output shaft of the motor 81 rotates, driving the gear 82 to rotate, and driving the rack 83 and the workbench 2 to slide through the engagement with the rack 83.
[0041] The implementation principle of the positioning device for a drop hammer testing machine in the embodiment of the present application is as follows: When conducting a drop hammer test, first start the motor 81. Through the engagement of the gear 82 and the rack 83, drive the workbench 2 to slide out of the frame 1. Then place the sample in the placement groove 31 on the placement plate 3. Then rotate the handle 52 to make the two positioning plates 4 approach each other and press against both end faces of the sample. Finally, start the motor 81 again to drive the workbench 2 to slide into the frame 1, and the test can begin.
[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A positioning device for a drop weight testing machine, comprising a frame (1), characterized in that: It also comprises a workbench (2) arranged on the frame (1), the workbench (2) comprising a placement plate (3) for placing samples, positioning plates (4) slidably arranged at both ends of the placement plate (3), and a first driving member (5) for driving the two positioning plates (4) to slide in a direction toward or away from each other; The positioning device further comprises a guide rail (6) arranged on the frame (1), a slider (7) slidably arranged on the guide rail (6), and a second driving member (8) for driving the slider (7) to slide along the length direction of the guide rail (6); the guide rail (6) is arranged along the horizontal direction, and the workbench (2) is connected to the slider (7); A limiting portion (61) is provided at one end of the guide rail (6) facing the slider (7), and a limiting groove (71) is provided on the slider (7) for the limiting portion (61) to slide, and when the limiting portion (61) slides in the limiting groove (71), the slider (7) is restricted from sliding in a direction away from the guide rail (6); The second driving member (8) comprises a motor (81) arranged on a frame, a gear (82) coaxially sleeved on an output end of the motor (81), and a rack (83) arranged on the workbench (2), the gear (82) meshing with the rack (83), and the length direction of the rack (83) is parallel to the length direction of the workbench (2); The guide rails (6) are arranged in parallel at two locations, and two sliders (7) are arranged on the workbench (2) corresponding to the guide rails (6).
2. A positioning device for a drop weight testing machine according to claim 1, characterized in that: The upper surface of the storage plate (3) is provided with a storage groove (31), and the storage groove (31) is in an upwardly expanding shape.
3. A positioning device for a drop weight testing machine according to claim 1, characterized in that: The workbench (2) is provided with sliding grooves (21) on both sides of the storage plate (3) for the two positioning plates (4) to slide. A guide rod (22) is arranged inside the workbench (2). The guide rod (22) slides through the two positioning plates (4) in sequence. The length direction of the guide rod (22) is parallel to the sliding direction of the positioning plates (4).
4. A positioning device for a drop weight testing machine according to claim 3, characterized in that: The first driving member (5) comprises a bidirectional screw (51) which is rotatably passed through the storage plate (3), the two ends of the bidirectional screw (51) respectively extending into the slide groove (21) and threadedly passed through the two positioning plates (4), the bidirectional screw (51) having a positive thread and a reverse thread with opposite threads on the outer side wall of the part located in the two slide grooves (21), and the two positioning plates (4) are respectively threadedly connected to the positive thread and the reverse thread.
5. A positioning device for a drop weight testing machine according to claim 4, characterized in that: The first driving member (5) further comprises a handle (52), and one end of the bidirectional screw rod (51) passes through the workbench (2) in a direction away from the storage plate (3) and is connected to the handle (52).