Experimental device for measuring damping characteristic of material
By designing a combination of an adjustable bracket and a clamping fixture, the problem of loose materials during the experiment is solved, stable clamping of the materials and accuracy of the data are achieved, which is suitable for testing materials of various specifications and provides reliable evaluation of shock absorption characteristics.
Patent Information
- Application Number
- CN202422843708.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-21
AI Technical Summary
Existing devices for measuring the shock-absorbing properties of materials have difficulty reliably clamping the material to be tested during the experiment, resulting in inaccurate experimental data and safety issues.
An experimental device including a vibration table, an adjustable bracket, a clamping fixture and a sensor was designed. The clamping fixture was used to achieve reliable self-locking clamping through the combination of a connecting part, a transmission part and a clamping part. A counterweight was set on the adjustable bracket to simulate actual working conditions.
It ensures stable clamping of materials during the experiment, improves the accuracy and safety of experimental data, adapts to the measurement needs of materials of different lengths, and provides data support for comprehensive evaluation of the material's shock absorption performance.
Smart Images
Figure CN223449769U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to material characteristic measuring device technical field, concretely is a kind of experimental device for measuring material shock absorption characteristic. BACKGROUND
[0002] The shock absorption characteristic of material has the position that can not be ignored in the field of vibration reduction and isolation, and the shock absorption performance of material directly affects the performance and life of the whole system, such as the anti-seismic structure of building and the shock absorption component of mechanical equipment.
[0003] The existing device for measuring the shock absorption characteristic of material is to apply vibration to the material during the experiment and observe the shock absorption effect of the material. Since vibration needs to be continuously applied during the test, ordinary clamps are difficult to reliably clamp the material to be tested, and the material may be displaced or loosened during the vibration process, which affects the experiment and the accuracy of experimental data.
[0004] Therefore, an experimental device capable of measuring the shock absorption characteristic of elastic material and having reliable clamping function is needed. UTILITY MODEL CONTENT
[0005] The utility model aims at providing an experimental device for measuring the shock absorption characteristic of material, which can measure the shock absorption characteristic of elastic material under different conditions and has a reliable self-locking clamp to ensure stable clamping of the material to be tested during the experiment, thereby solving the technical problems in the background art.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme, a device for measuring the shock absorption characteristic of material, comprising: a vibration table, an adjustable support, a test material, a counterweight, a sensor and a compression clamp;
[0007] The vibration table is arranged at the lowermost end of the device, and two adjustable supports are arranged on the vibration table. Each adjustable support is provided with a compression clamp. The test material is clamped between the two adjustable supports by the two compression clamps. A counterweight is arranged in the middle of the test material, and a sensor is fixed on the counterweight.
[0008] The compression clamp comprises a connecting portion, a transmission portion and a clamping portion. The compression clamp is fixed on the adjustable support through the connecting portion. The clamping portion is fixedly connected with the connecting portion, and the transmission portion is installed on the clamping portion. The test material is clamped and fixed by the clamping portion driven by the transmission portion.
[0009] Further, the clamping portion comprises a clamp body and two clamping jaws.
[0010] The clamp body comprises a box body and an upper cover fixed on the box body. An installation space for accommodating the clamping jaws and the transmission portion is left between the box body and the upper cover.
[0011] The two clamping jaws are movably mounted on the box body; the two clamping jaws are oppositely arranged to form a clamping structure; the tail of the clamping jaw is provided with a screw block; the screw block is internally provided with an internal thread; the transmission part is threadedly connected with the screw block, and the two clamping jaws are clamped or opened through the transmission part.
[0012] Further, the transmission part comprises a rotating shaft and a hand wheel; the rotating shaft is rotatably mounted on the box body through bearings at two ends; the two ends of the rotating shaft pass through the two sides of the box body and extend outward; the left and right parts of the rotating shaft are both provided with threads, and the screw directions of the threads on the left and right parts are opposite; the hand wheel is fixed on one side of the rotating shaft; the rotating shaft is rotated by rotating the hand wheel.
[0013] Further, the compression type clamp further comprises a locking structure; the locking structure comprises a ratchet wheel, a pawl and a baffle;
[0014] The ratchet wheel is fixed on the side of the rotating shaft away from the hand wheel;
[0015] The pawl is arranged on one side of the ratchet wheel; the pawl tip of the pawl faces the ratchet wheel;
[0016] The baffle is arranged between the ratchet wheel and the pawl, and the baffle is movably arranged on the box body; the baffle comprises a sliding part and a blocking part;
[0017] The sliding part is a dovetail sliding block; a corresponding dovetail sliding groove is formed on the side wall of the box body near the ratchet wheel;
[0018] The blocking part is a plate structure; the width of the blocking part is greater than the width of the ratchet wheel, and the blocking part can isolate the ratchet wheel and the pawl.
[0019] Further, the side surface of the baffle is provided with a support plate, the support plate is provided with a locking screw, and two threaded holes are formed on the side wall of the box body along the moving direction of the baffle; the position of the baffle is locked by screwing the locking screw into one of the threaded holes.
[0020] Further, the tail end of the pawl is provided with a fixing block; a spring is abutted between the fixing block and the tail of the pawl, and the spring is in a compressed state; the spring provides a thrust force for the pawl, so that the pawl has a movement trend of approaching the ratchet wheel.
[0021] Further, the adjustable support comprises a threaded column at the upper part and a sliding block structure at the bottom part;
[0022] The bottom part of the sliding block structure is provided with a fastener; a sliding groove is formed on the table surface of the vibration table; and the threaded column is fixed on the vibration table through the fastener.
[0023] Further, the connecting part is a plate structure with a round hole, the connecting part is sleeved on the threaded column, and the connecting part is clamped on the threaded column through the two upper and lower nuts.
[0024] Advantages
[0025] The compression type clamp with the locking structure can reliably clamp the test material during the experiment.
[0026] The adjustable support of the device can adapt to the measurement requirements of elastic materials of different lengths, and the nut adjustment mode of the connecting part of the compression type clamp can conveniently adjust the working height of the clamp, improve the versatility and flexibility of the device, and be used for testing elastic materials of various specifications.
[0027] The device can accurately measure the shock absorption effect of the elastic material under different vibration conditions by arranging the counterweight in the middle of the test material and fixing the sensor thereon. BRIEF DESCRIPTION OF DRAWINGS
[0028] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows.
[0029] Figure 1 is a schematic view of the overall structure of the device disclosed by the present application;
[0030] Figure 2 is a schematic view of the compression type clamp of the device disclosed by the present application;
[0031] Figure 3 is a schematic view of the locking structure of the device disclosed by the present application;
[0032] Figure 4 is a schematic view of the locking state of the locking structure of the device disclosed by the present application;
[0033] Figure 5 is a schematic view of the transmission part and the clamping part of the device disclosed by the present application;
[0034] Figure 6 is a sectional view of the device disclosed by the present application.
[0035] 1, vibration table; 2, adjustable support; 201, threaded column; 202, slider structure; 3, test material; 4, counterweight; 5, spring; 6, connecting part; 7, transmission part; 701, rotating shaft; 702, hand wheel; 8, clamping part; 801, clamping jaw; 802, box body; 9, locking structure; 901, ratchet; 902, pawl; 903, baffle; 904, support plate. DETAILED DESCRIPTION
[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0037] To achieve the above-mentioned purpose, the present application provides the following technical scheme, as shown in a device for measuring the shock absorption characteristics of a material, comprising: a vibration table 1, an adjustable support 2, a test material 3, a counterweight 4, a sensor and a compression clamp. Figures 1-6
[0038] The vibration table 1 is arranged at the lowermost end of the device and provides a vibration source for the entire experiment. The vibration table 1 is provided with two adjustable supports 2, which are used to support and fix the compression clamp and can adjust the distance according to the length of the material to be tested. Each adjustable support 2 is provided with a compression clamp. The test material 3 is clamped between the two adjustable supports 2 by the two compression clamps. The counterweight 4 is arranged in the middle of the test material 3, which simulates the additional load that the elastic material may bear in actual application, so that the measurement result is closer to the actual working condition. The sensor is fixed on the counterweight 4 and is used to measure the vibration data of the test material 3 during the vibration process.
[0039] The test material 3 in the present embodiment can be various shapes, such as sheet-shaped and strip-shaped. The shape will affect the stress condition and shock absorption performance of the material in the experiment. Among them, the sheet-shaped material is more suitable for simulating the shock absorption in the plane structure, and the strip-shaped material can be used to study the shock absorption performance in the tensile or bending state.
[0040] The counterweight 4 is used to simulate the additional load that the material may bear in actual application. In actual engineering, the material often needs to play a shock absorption role under certain load, and the setting of the counterweight 4 can make the experiment closer to the real working condition, so as to more accurately measure the shock absorption characteristics of the elastic material under the load condition. By changing the mass of the counterweight 4, the influence of different loads on the shock absorption performance of the material can be further studied.
[0041] The sensor in the embodiment adopts an accelerometer sensor, and sensors are arranged on the counterweight 4 and the vibration table 1; the sensors are used for measuring vibration data of the test material 3 in the vibration process, the measurement data of the sensor on the counterweight 4 reflect the vibration condition after the material is damped, and the measurement data of the sensor on the vibration table 1 is taken as the original vibration input; by comparing the data, the damping effect of the material can be calculated and analyzed.
[0042] The pressing clamp comprises a connecting part 6, a transmission part 7 and a clamping part 8; the pressing clamp is fixed on the adjustable support 2 through the connecting part 6; the clamping part 8 is fixedly connected with the connecting part 6, and the transmission part 7 is installed on the clamping part 8; the test material 3 is clamped and fixed by the clamping part 8 driven by the transmission part 7.
[0043] Further, the clamping part 8 comprises a clamp body and two clamping jaws 801.
[0044] The clamp body comprises a box body 802 and an upper cover fixed on the box body 802; an installation space for accommodating the clamping jaws 801 and the transmission part 7 is left between the box body 802 and the upper cover; a hole position for installing a bearing is formed in the side wall of the box body 802; the box body 802 serves as a basic frame of the clamping part 8 and provides installation and support space for the clamping jaws 801 and the transmission part 7. The upper cover is a plate-shaped structure matched with the box body 802 and is fixedly connected with the box body 802 by screws.
[0045] The two clamping jaws 801 are movably installed on the box body 802; the two clamping jaws 801 are oppositely arranged to form a clamping structure; a screw block is arranged at the tail of the clamping jaw 801; an internal thread is formed in the screw block; the transmission part 7 is threadedly connected with the screw block and drives the two clamping jaws 801 to clamp or open. Further, guide blocks are arranged on the upper and lower sides of the screw block, and guide grooves in the movement direction of the screw block are formed in the top wall and the bottom wall of the box body 802 and the upper cover; the movement direction of the screw block and the clamping jaw 801 is defined by the cooperation of the guide blocks and the guide grooves.
[0046] Further, the transmission part 7 comprises a rotating shaft 701 and a hand wheel 702; the rotating shaft 701 is rotatably installed on the box body 802 through bearings at two ends; the two ends of the rotating shaft 701 pass through the two sides of the box body 802 and extend outward; threads are arranged on the left and right parts of the rotating shaft 701, the screw directions of the threads on the left and right parts are opposite, the pitches and tooth types of the threads are matched with the internal thread of the screw block at the tail of the clamping jaw 801, the rotating shaft 701 is rotated to drive the two clamping jaws 801 to move relatively, so that the clamping or opening action is completed. The hand wheel 702 is fixed on one side of the rotating shaft 701.
[0047] In use, the hand wheel 702 is rotated, and the hand wheel 702 drives the rotating shaft 701 to rotate. Since the threads of the left and right parts of the rotating shaft 701 are opposite, the two clamping jaws 801 tail blocks connected with the rotating shaft 701 move relative to each other under the action of the threads. When the rotating shaft 701 rotates in the forward direction, the two clamping jaws 801 move towards each other, gradually clamping the test material 3; when the rotating shaft 701 rotates in the reverse direction, the two clamping jaws 801 move away from each other, and the clamping jaws 801 are loosened, facilitating the installation and disassembly of the material. During the clamping process, attention should be paid to the contact between the clamping jaws 801 and the material to avoid excessive clamping and damage to the material.
[0048] Further, the compression clamp further comprises a locking structure 9; the locking structure 9 comprises a ratchet wheel 901, a pawl 902 and a baffle 903;
[0049] The ratchet wheel 901 is fixed on the side of the rotating shaft 701 away from the hand wheel 702; the ratchet wheel 901 is a circular disc structure, and a plurality of tooth structures are arranged on the outer periphery of the ratchet wheel 901; the shape of the pawl 902 is matched with the shape of the tooth of the ratchet wheel 901,
[0050] The pawl 902 is arranged on one side of the ratchet wheel 901; the pawl 902 is arranged between two guide blocks, and a guide channel with a certain width in the vertical direction is formed between the two guide blocks; the main body part of the pawl 902 is a cuboid structure, and the width of the main body part is consistent with the width of the guide channel; the pawl 902 moves up and down along the guide channel.
[0051] The baffle 903 is arranged between the ratchet wheel 901 and the pawl 902, and the baffle 903 is movably arranged on the box body 802; the baffle 903 is divided into a sliding part and a blocking part;
[0052] The sliding part is a dovetail sliding block; a corresponding dovetail sliding groove is formed on the side wall of the box body 802 close to the ratchet wheel 901; the sliding part slides along the sliding groove;
[0053] The blocking part is a plate structure; the width of the blocking part is greater than the width of the ratchet wheel 901, and the blocking part can isolate the ratchet wheel 901 and the pawl 902;
[0054] When the locking structure 9 needs to lock the compression clamp, the baffle 903 is moved away from the ratchet wheel 901; the pawl 902 moves downward and is clamped on the tooth of the ratchet wheel 901, so that the ratchet wheel 901 and the rotating shaft 701 fixedly connected with the ratchet wheel 901 are locked, and then the entire transmission part 7 and the clamping jaw 801 are locked;
[0055] When it is needed to unlock, move the pawl 902 upward, and move the baffle 903 between the pawl 902 and the ratchet 901, at this time the baffle 903 separates the ratchet 901 and the pawl 902, the lower end of the pawl 902 stops on the baffle 903, and the ratchet 901 can rotate freely.
[0056] Further, the side surface of the baffle 903 is provided with a support plate 904, the support plate 904 is provided with a locking screw, and two threaded holes are formed on the side wall of the box body 802 along the moving direction of the baffle 903; the position of the baffle 903 is locked by screwing the locking screw into one of the threaded holes, so as to prevent the movement of the baffle 903; the two threaded holes are respectively the starting point and the end point of the sliding of the baffle 903 along the slide.
[0057] Further, the tail end of the pawl 902 is provided with a fixing block; the spring 5 is abutted between the fixing block and the tail of the pawl 902, and the spring 5 is in a compressed state; the pawl 902 is provided with a pushing force by the spring 5, so that the pawl 902 has a movement tendency of approaching the ratchet 901; under the pushing force of the spring 5, the pawl 902 can be automatically clamped into the tooth groove of the ratchet 901, so as to lock the ratchet 901 and the rotating shaft 701.
[0058] Further, the adjustable support 2 comprises a threaded column 201 at the upper portion and a sliding block structure 202 at the bottom portion.
[0059] The threaded column 201 is in a columnar structure, and the outer surface thereof is provided with threads; the bottom portion of the sliding block structure 202 is provided with a fastener; correspondingly, a sliding groove is arranged on the table surface of the vibration table 1; the threaded column 201 is fixed on the vibration table 1 through the fastener; so as to be applicable to the measurement of elastic materials with different lengths; the fastener can be selected as a bolt and a nut combination; when the bolt and the nut combination is adopted, the bolt passes through the mounting hole at the bottom portion of the sliding block structure 202, and is screwed into the corresponding threaded hole in the table surface of the vibration table 1, and the fastening is realized by tightening the nut.
[0060] Further, the connecting portion 6 is in a plate-like structure with a circular hole, the connecting portion 6 is sleeved on the threaded column 201, and the connecting portion 6 is clamped on the threaded column 201 through two nuts, and the working height of the compression clamp can be adjusted by adjusting the mounting height of the two nuts.
[0061] Working principle:
[0062] Firstly, according to the length of the elastic material to be measured, the distance of the adjustable support 2 is adjusted, the sliding block structure 202 is moved, and the threaded column 201 is fixed on the vibration table 1 at a proper position through the fastener.
[0063] Then, the test material 3 is placed between the two compression clamps, the hand wheel 702 is rotated to drive the rotating shaft 701 to rotate, and due to the special design of the threads of the rotating shaft 701, the two clamping jaws 801 move relatively to clamp the test material 3.
[0064] When the test material 3 is clamped, the compression clamp needs to be locked to prevent loosening of the clamp during vibration. The baffle 903 is moved away from the ratchet wheel 901, at this time the pawl 902 is moved downward along the guide channel under the pushing force of the spring 5, and the pawl tip of the pawl 902 is clamped into the gear teeth of the ratchet wheel 901. Since the ratchet wheel 901 is fixedly connected with the rotating shaft 701, the locking action of the pawl 902 makes the rotating shaft 701 unable to rotate, thereby locking the entire transmission part 7 and the clamping jaw 801, and ensuring stable clamping of the test material 3 during the experiment.
[0065] After adjusting the position of the baffle 903, the position of the baffle 903 is locked through the locking screw on the support plate 904. The locking screw is screwed into the corresponding threaded hole in the side wall of the box body 802, so as to prevent the baffle 903 from moving accidentally during the experiment, and ensure that the locking state of the pawl 902 and the ratchet wheel 901 is stable and reliable.
[0066] The counterweight 4 is installed in the middle of the test material 3, and the sensor is fixed on the counterweight 4; at the same time, a sensor is also installed on the vibration table 1, which is used to measure the original vibration signal of the vibration table 1, so as to be compared and analyzed subsequently, and the shock absorption effect of the test material 3 is calculated.
[0067] The vibration table 1 is started to generate vibration, the sensor measures the vibration data of the test material 3 during the vibration process, and through a control variable experiment, such as gradually changing the vibration intensity, changing the material length and area, etc., a plurality of groups of data are obtained.
[0068] Finally, the measured data are analyzed and calculated to obtain the shock absorption characteristic parameters of the test material.
[0069] The embodiments of the utility model are given for the purpose of example and description, and are not exhaustive or limit the utility model to the disclosed forms. Many modifications and changes are obvious to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical application of the utility model, and to enable those skilled in the art to understand the utility model so as to design various embodiments with various modifications suitable for specific purposes.
Claims
1. A device for measuring the shock absorption properties of a material, characterized in that: include: A vibration table (1), an adjustable bracket (2), a counterweight (4), a sensor, and a clamp; The vibration table (1) is arranged at the bottom of the device, and two adjustable brackets (2) are arranged on the vibration table (1); each adjustable bracket (2) is provided with a clamping clamp; the test material (3) is clamped between the two adjustable brackets (2) by the two clamping clamps; a counterweight (4) is provided in the middle of the test material (3), and the sensor is fixed on the counterweight (4); The compression clamp comprises a connecting portion (6), a transmission portion (7) and a clamping portion (8); the compression clamp is fixed to the adjustable bracket (2) via the connecting portion (6); the clamping portion (8) is fixedly connected to the connecting portion (6), and the transmission portion (7) is mounted on the clamping portion (8); the transmission portion (7) drives the clamping portion (8) to clamp and fix the test material (3).
2. The device for measuring the shock absorption characteristics of a material according to claim 1, characterized in that: The clamping portion (8) comprises a clamp body and two clamping claws (801); The clamp body comprises a box body (802) and an upper cover fixed on the box body (802); an installation space for accommodating the clamping claw (801) and the transmission part (7) is reserved between the box body (802) and the upper cover; The two clamping jaws (801) are movably mounted on the box body (802); the two clamping jaws (801) are arranged relative to each other to form a clamping structure; a screw block is provided at the tail of the clamping jaw (801); an internal thread is provided in the screw block; the transmission part (7) is threadedly connected to the screw block, and the two clamping jaws (801) are driven to clamp or open through the transmission part (7).
3. The device for measuring the shock absorption characteristics of a material according to claim 2, characterized in that: The transmission part (7) includes a rotating shaft (701) and a hand wheel (702); The rotating shaft (701) is rotatably mounted on the box body (802) via bearings at both ends; both ends of the rotating shaft (701) pass through both sides of the box body (802) and extend outward; both left and right parts of the rotating shaft (701) are provided with threads, and the spiral directions of the threads on the left and right parts are opposite; the hand wheel (702) is fixed to one side of the rotating shaft (701); and the rotating shaft (701) is driven to rotate by rotating the hand wheel (702).
4. The device for measuring the shock absorption characteristics of a material according to claim 3, characterized in that: The clamping fixture further comprises a locking structure (9); the locking structure (9) comprises a ratchet (901), a pawl (902) and a baffle (903); The ratchet (901) is fixed on a side of the rotating shaft (701) away from the hand wheel (702); The pawl (902) is arranged on one side of the ratchet (901); the top of the pawl (902) faces the ratchet (901); The baffle (903) is arranged between the ratchet (901) and the pawl (902), and the baffle (903) is movably arranged on the box body (802); the baffle (903) is divided into a sliding part and a blocking part; The sliding portion is a dovetail slider structure; correspondingly, a matching dovetail sliding groove is provided on the side wall of the box body (802) near the ratchet (901); The blocking portion is a plate-shaped structure; the width of the blocking portion is greater than the width of the ratchet (901), and the blocking portion isolates the ratchet (901) from the pawl (902).
5. The device for measuring the shock absorption characteristics of a material according to claim 4, characterized in that: A support plate (904) is provided on the side of the baffle (903), and a locking screw is provided on the support plate (904). Correspondingly, two threaded holes are opened on the side wall of the box body (802) along the moving direction of the baffle (903); the position of the baffle (903) is locked by screwing the locking screw into one of the threaded holes.
6. The device for measuring the shock absorption characteristics of a material according to claim 4, characterized in that: A fixing block is provided at the tail end of the pawl (902); a spring (5) is abutted between the fixing block and the tail end of the pawl (902), and the spring (5) is in a compressed state; the spring (5) provides thrust for the pawl (902), so that the pawl (902) tends to move closer to the ratchet wheel (901).
7. The device for measuring the shock absorption characteristics of a material according to claim 1, characterized in that: The adjustable bracket (2) comprises a threaded column (201) at the top and a slider structure (202) at the bottom; A fastener is provided at the bottom of the slider structure (202); a slide groove is provided on the corresponding table surface of the vibration table (1); and the threaded column (201) is fixed to the vibration table (1) via the fastener.
8. The device for measuring the shock absorption characteristics of a material according to claim 1, characterized in that: The connecting portion (6) is a plate-shaped structure with a circular hole. The connecting portion (6) is sleeved on the threaded column (201) and is clamped on the threaded column (201) by two upper and lower nuts.