Resiliometer calibrator

Abstract

The utility model discloses a resiliometer calibrator, which belongs to the technical field of resiliometer, and comprises a calibration frame, a bouncing tension spring body, a bouncing hammer body, a transverse frame vernier, a weight body, a base and a scale plate, the transverse frame vernier is clamped at the bottom of the bouncing hammer body, a stabilizing mechanism is arranged at the top of the base, and the scale plate is arranged on the transverse frame vernier. A limiting mechanism is arranged at the top of the base; the stabilizing mechanism comprises a sliding groove, a stabilizing rod, two pinching blocks and a limiting hole, the sliding groove is formed in the rear side of the stabilizing rod, and the sides, close to the stabilizing rod, of the pinching blocks are fixedly connected with the stabilizing rod. The problem that the calibration efficiency of the rigidity of the elastic tension spring is affected due to the fact that the scale indicated by the cross rod floats due to the fact that the elastic tension spring, the tray hook and the weight need to be manually supported and stabilized and then the scale value can be observed is solved.

Description

Technical Field

[0001] This utility model relates to the field of rebound hammer technology, and in particular to a rebound hammer calibrator. Background Technology

[0002] A rebound hammer is a non-destructive testing instrument used to test the surface hardness of building materials such as concrete and brick, and to estimate their strength based on the surface hardness. It is widely used in the construction engineering field. A rebound hammer calibrator is a professional device used for metrological verification and calibration of rebound hammers. It mainly consists of a main frame, a spring, a hammer, a rod, and a scale panel.

[0003] In existing rebound spring calibration devices, the upper end of the rebound spring is fixed to a crossbar or positioning plate at the top of a support rod, and a weight is suspended from the lower end of the spring. The tensile length and tension of the spring are measured using the weight. Therefore, during measurement, the axis of the spring must be in the same vertical direction as the direction of gravity. If an angle is formed between gravity and the axis of the spring, the spring will be stretched in a direction deviating from the axis under the action of gravity, which will affect the accuracy of the calibration. Currently, the main reason for the spring's deviation is that the crossbar or positioning plate needs to be kept horizontal. However, to keep it horizontal, a level needs to be installed on the crossbar or positioning plate. The horizontality of the crossbar and positioning plate needs to be measured and adjusted every time it is used, which is inefficient. At the same time, the measuring ruler used for calibration is mounted on the support column, making it difficult to keep it parallel to the direction of gravity. This also results in low accuracy in measuring the tensile length and tension of the spring.

[0004] The existing patent (publication number: CN211426148U) discloses a spring-loaded spring calibration device for a rebound spring. This utility model can keep the axis of the spring-loaded spring aligned with the direction of gravity, thus avoiding the deviation of the spring-loaded spring's axis under the action of gravity. This results in high calibration accuracy. Furthermore, by adjusting the pointing angles of the first and second pointers, the accuracy and precision of the measurement can be further enhanced.

[0005] To address the aforementioned issues, existing patents have provided solutions. However, when a weight is attached to the tray hook proposed in these patents, the spring-loaded spring, tray hook, and weight will wobble, causing the scale indicated by the crossbar to fluctuate. The spring-loaded spring, tray hook, and weight need to be manually supported and stabilized before the scale value can be observed, which affects the efficiency of verifying the stiffness of the spring-loaded spring.

[0006] Therefore, a rebound tester calibrator is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a rebound spring tester that can solve the problem in existing patents where, after a weight is hung on the tray hook, the spring-loaded spring, the tray hook, and the weight will wobble, causing the scale indicated by the crossbar to fluctuate. This requires manual support and stabilization of the spring-loaded spring, the tray hook, and the weight before the scale value can be observed, thus affecting the efficiency of spring-loaded spring stiffness testing.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a rebound hammer calibrator, comprising a calibration frame, a spring body, a hammer body, a crossbeam vernier, a weight body, a base, and a scale plate. The crossbeam vernier is snapped into the bottom of the hammer body, a stabilizing mechanism is provided on the top of the base, and a limiting mechanism is provided on the top of the base.

[0009] The stabilizing mechanism includes a slide groove, a stabilizing rod, two pinch blocks, and a limiting hole. The slide groove is located on the rear side of the stabilizing rod, the pinch blocks are fixedly connected to the stabilizing rod on the side closest to the stabilizing rod, and the limiting hole is located at the bottom of the front side of the stabilizing rod.

[0010] Preferably, the crossbeam vernier is slidably connected inside the slide groove, and a counterweight is fixedly connected to the top of the crossbeam vernier.

[0011] Preferably, a limiting frame is fixedly connected to the rear side of the crossbeam vernier, and the inner wall of the limiting frame is in movable contact with the surface of the scale plate.

[0012] Preferably, a fixing frame is fixedly connected to the left side of the limiting frame, and a high-magnification magnifying glass is fixedly connected to the bottom of the fixing frame. The high-magnification magnifying glass is located on the left side of the scale plate.

[0013] Preferably, the limiting mechanism includes a rotating rod, a limiting block, a fixing block, and a limiting groove. The limiting groove is formed inside the base, the fixing block is fixedly connected to the inner wall of the limiting groove, and the rotating rod is threadedly connected to the inside of the fixing block.

[0014] Preferably, the stabilizer bar is movably inserted into the inside of the limiting groove, and the limiting block is movably inserted into the inside of the limiting hole.

[0015] Preferably, a screw rod is fixedly connected to the front side of the rotating rod.

[0016] Preferably, the surface of the pinch block is fixedly connected with rubber protrusions, and the number of rubber protrusions is several and they are evenly distributed on the surface of the pinch block.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application provides a stabilizing rod at the top of the base, allowing the crossbeam vernier to slide inside the groove, and the inner wall of the limiting frame to make active contact with the surface of the scale plate. This ensures that when the weight is hung at the bottom of the impact hammer, the crossbeam vernier, the impact hammer body, and the impact spring body will only float up and down, without moving to the sides or back and forth. This makes it easy to support the crossbeam vernier, the impact hammer body, and the impact spring body to a stable state, so that the scale plate value can be read clearly and quickly through a high-magnification lens, thus improving the verification efficiency of the impact spring body inside the rebound hammer.

[0019] 2. This application inserts the stabilizer rod into the limiting groove and then locks the rotating rod, so that the limiting block extends into the limiting hole, thereby limiting the stabilizer rod inside the limiting groove. This allows the crossbeam vernier body to slide inside the slide groove, preventing the crossbeam vernier from swaying forward, backward, and to the sides. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the rebound hammer tester of this utility model;

[0021] Figure 2 This is a three-dimensional connection diagram of the stabilizing mechanism in this utility model;

[0022] Figure 3 This is a three-dimensional connection diagram of the crossbeam vernier and the limiting frame in this utility model;

[0023] Figure 4 This is a three-dimensional exploded view of the rotating rod and the fixing block in this utility model;

[0024] Figure 5 This is a three-dimensional connection diagram of the pinch block and the rubber protrusions in this utility model.

[0025] In the diagram, 1. Calibration frame; 2. Spring body; 3. Strike hammer body; 4. Horizontal frame vernier; 5. Stabilizing mechanism; 501. Slide groove; 502. Stabilizing rod; 503. Pinch block; 504. Limiting hole; 6. Weight body; 7. Base; 8. Scale plate; 9. Limiting mechanism; 901. Rotating rod; 902. Limiting block; 903. Fixing block; 904. Limiting groove; 10. Limiting frame; 11. Fixing frame; 12. High magnification lens; 13. Counterweight; 14. Tightening column; 15. Rubber protrusion. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-5 The present invention provides the following technical solution:

[0028] A rebound tester calibrator includes a calibration frame 1, a spring body 2, a hammer body 3, a crossbeam vernier 4, a weight body 6, a base 7, and a scale plate 8. The crossbeam vernier 4 is snapped into the bottom of the hammer body 3. A stabilizing mechanism 5 is provided on the top of the base 7, and a limiting mechanism 9 is provided on the top of the base 7.

[0029] The stabilizing mechanism 5 includes a slide 501, a stabilizing rod 502, two pinch blocks 503, and a limiting hole 504. The slide 501 is located on the rear side of the stabilizing rod 502. The pinch blocks 503 are fixedly connected to the stabilizing rod 502 on the side closest to the stabilizing rod 502. The limiting hole 504 is located at the bottom of the front side of the stabilizing rod 502.

[0030] In this embodiment: when verifying the stiffness of the rebound spring body 2 inside the rebound hammer, first place the base 7 on the horizontal external worktable, insert the stabilizing rod 502 into the limiting groove 904, rotate the rotating rod 901 to move the rotating rod 901, thereby driving the limiting block 902 to move backward into the limiting hole 504, thus limiting the stabilizing rod 502 in the limiting groove 904. Then, hang the rebound spring body 2 on the verification frame 1, and then engage the crossbeam vernier 4 with the rebound hammer body 3 and move it to make contact with the inner wall of the slide groove 501. At the same time, the limiting frame 10 makes contact with the surface of the scale plate 8. The slide groove 501 and the scale plate 8 are used to limit the crossbeam vernier. 4. At this point, when the weight is hung, the crossbeam vernier 4, the impact hammer body 3, and the impact spring body 2 will only float up and down, without swaying to the sides or back and forth, making it easy to maintain a stable state. Then, through the high-magnification magnifying glass 12, the value of the scale plate 8 can be clearly and quickly read to determine the stiffness of the impact spring body 2, improving the verification efficiency. This avoids the problem in the existing patent where, after the weight is hung on the tray hook, the impact spring, tray hook, and weight will wobble, causing the scale indicated by the crossbeam to fluctuate. It requires manual support and stabilization of the impact spring, tray hook, and weight before the scale value can be observed, which affects the efficiency of the impact spring stiffness verification.

[0031] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the crossbeam vernier 4 is slidably connected inside the slide groove 501, and a counterweight 13 is fixedly connected to the top of the crossbeam vernier 4.

[0032] Specifically, such as Figure 1 and Figure 3 As shown, a limiting frame 10 is fixedly connected to the rear side of the horizontal vernier 4, and the inner wall of the limiting frame 10 is in contact with the surface of the scale plate 8.

[0033] Specifically, such as Figure 1 and Figure 3 As shown, a fixing frame 11 is fixedly connected to the left side of the limiting frame 10, and a high-magnification magnifying glass 12 is fixedly connected to the bottom of the fixing frame 11. The high-magnification magnifying glass 12 is located to the left of the scale plate 8.

[0034] In this embodiment: the horizontal frame vernier 4 is slidably connected to the inside of the slide groove 501, and the inner wall of the limiting frame 10 is in active contact with the surface of the scale plate 8. This ensures that when the weight body 6 is hung at the bottom of the impact hammer body 3, the horizontal frame vernier 4, the impact hammer body 3, and the impact spring body 2 will only float up and down, without swaying to the sides or back and forth. This makes it easy to support the horizontal frame vernier 4, the impact hammer body 3, and the impact spring body 2 to a stable state. By magnifying the scale plate 8 with the high-magnification magnifying glass 12, the value corresponding to the limiting frame 10 can be easily observed.

[0035] Specifically, such as Figure 4 As shown, the limiting mechanism 9 includes a rotating rod 901, a limiting block 902, a fixing block 903, and a limiting groove 904. The limiting groove 904 is opened inside the base 7, the fixing block 903 is fixedly connected to the inner wall of the limiting groove 904, and the rotating rod 901 is threadedly connected to the inside of the fixing block 903.

[0036] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the stabilizer bar 502 is movably inserted into the inside of the limiting groove 904, and the limiting block 902 is movably inserted into the inside of the limiting hole 504.

[0037] In this embodiment: by inserting the stabilizer 502 into the limiting groove 904 and then rotating the rotating rod 901 to lock it, the limiting block 902 moves into the limiting hole 504, thus limiting the stabilizer 502 inside the limiting groove 904.

[0038] Specifically, such as Figure 4 As shown, a screw rod 14 is fixedly connected to the front side of the rotating rod 901.

[0039] Specifically, such as Figure 5 As shown, rubber protrusions 15 are fixedly connected to the surface of the pinch block 503. The number of rubber protrusions 15 is several and they are evenly distributed on the surface of the pinch block 503.

[0040] In this embodiment: the rotating rod 901 can be easily rotated by holding the screw 14, and the stabilizing rod 502 can be easily inserted into and pulled out of the limiting groove 904 by holding the pinch block 503 and contacting the rubber protrusion 15 with the fingers.

[0041] Working principle: When the stiffness of the internal spring body 2 of the rebound spring needs to be checked, the base 7 is placed on a horizontal external worktable. Then, the stabilizing rod 502 is inserted into the limiting groove 904, and the rotating rod 901 is rotated. The rotating rod 901 is connected to the fixed block 903 by a thread. When the rotating rod 901 rotates, it can move. Moving the rotating rod 901 backward until the limiting block 902 moves into the limiting hole 504 will allow the spring to be retracted. The stabilizer bar 502 is limited inside the limiting groove 904. Then, the spring body 2 is hung on the calibration frame 1, and the crossbeam vernier 4 is engaged with the spring hammer body 3. The crossbeam vernier 4 is then moved until it makes contact with the inner wall of the slide groove 501. The inside of the limiting frame 10 makes contact with the surface of the scale plate 8. At this time, the slide groove 501 and the scale plate 8 can limit the crossbeam vernier 4. Then, when the weight is hung at the bottom of the crossbeam vernier 4, the crossbeam vernier 4, the spring hammer body 3, and the spring... The spring body 2 only floats up and down, without swaying to the sides or back and forth. This makes it easy to stabilize the crossbeam vernier 4, the impact hammer body 3, and the spring body 2. The values ​​on the scale plate 8 can then be clearly and quickly read through the high-magnification lens 12, facilitating the determination of the spring body 2's stiffness. This improves the efficiency of stiffness testing of the spring body 2 inside the rebound spring tester. It avoids the problem in existing patents where the spring body, pallet hook, and weights wobble after being attached, causing the scale indicated by the crossbeam to fluctuate. This necessitates manual stabilization of the spring body, pallet hook, and weights before observing the scale values, thus affecting the efficiency of spring stiffness testing. It should be noted that the connection between the rebound spring tester, the spring body 2, and the testing frame 1; the connection between the crossbeam vernier 4 and the impact hammer body 3; and the operation method of the rebound spring tester are all existing, published, and mature technologies, and will not be elaborated upon here.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 rebound hammer calibrator, comprising a calibration frame (1), a spring body (2), a hammer body (3), a crossbeam vernier (4), a weight body (6), a base (7), and a scale plate (8), characterized in that: The crossbeam vernier (4) is snapped into the bottom of the hammer body (3), the base (7) is provided with a stabilizing mechanism (5) at the top, and the base (7) is provided with a limiting mechanism (9) at the top. The stabilizing mechanism (5) includes a slide groove (501), a stabilizing rod (502), two pinch blocks (503), and a limiting hole (504). The slide groove (501) is located on the rear side of the stabilizing rod (502). The pinch blocks (503) are fixedly connected to the stabilizing rod (502) on the side closest to the stabilizing rod (502). The limiting hole (504) is located at the bottom of the front side of the stabilizing rod (502).

2. The rebound hammer tester according to claim 1, characterized in that: The crossbeam vernier (4) is slidably connected inside the slide groove (501), and a counterweight (13) is fixedly connected to the top of the crossbeam vernier (4).

3. A rebound hammer tester according to claim 1, characterized in that: The rear side of the crossbeam vernier (4) is fixedly connected to a limiting frame (10), and the inner wall of the limiting frame (10) is in contact with the surface of the scale plate (8).

4. A rebound hammer tester according to claim 3, characterized in that: A fixing frame (11) is fixedly connected to the left side of the limiting frame (10), and a high-magnification magnifying glass (12) is fixedly connected to the bottom of the fixing frame (11). The high-magnification magnifying glass (12) is located to the left of the scale plate (8).

5. A rebound hammer tester according to claim 1, characterized in that: The limiting mechanism (9) includes a rotating rod (901), a limiting block (902), a fixing block (903), and a limiting groove (904). The limiting groove (904) is opened inside the base (7). The fixing block (903) is fixedly connected to the inner wall of the limiting groove (904). The rotating rod (901) is threadedly connected to the inside of the fixing block (903).

6. A rebound hammer tester according to claim 5, characterized in that: The stabilizer bar (502) is movably inserted into the inside of the limiting groove (904), and the limiting block (902) is movably inserted into the inside of the limiting hole (504).

7. A rebound hammer tester according to claim 5, characterized in that: A screw rod (14) is fixedly connected to the front side of the rotating rod (901).

8. A rebound hammer tester according to claim 1, characterized in that: The surface of the pinch block (503) is fixedly connected with rubber protrusions (15), and the number of rubber protrusions (15) is several and they are evenly distributed on the surface of the pinch block (503).

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