A stone impact resistance testing machine

Abstract

The utility model relates to impact testing machine technical field discloses a kind of stone impact testing machine, including testing machine body, the testing machine body one side upper end is fixedly arranged with protection box, the inside one side of protection box is provided with adjusting mechanism, the adjusting mechanism includes fixed plate, the inside one side of fixed plate is rotatably arranged with first worm, the inside one side of fixed plate is rotatably arranged with first worm wheel close to testing machine body, the lower end of first worm wheel is fixedly arranged with connecting frame, the inside front end of connecting frame is rotatably arranged with second worm wheel, the inside front end of connecting frame is rotatably arranged with second worm close to upper end.In the utility model, the adjustment of different angles is realized by two groups of worm gears respectively, the stress state of coating under different impact angles can be simulated, the diversified testing scene demand is satisfied, the evaluation result is more comprehensive, and the worm gear has self-locking, the angle can be kept stable after adjustment.

Description

Technical Field

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

[0002] Impact testing machines are a type of material testing machine specifically designed to apply impact test forces to specimens in order to complete the impact performance test of materials. Its core function is to simulate the mechanical response of materials under instantaneous impact loads, providing data support for evaluating key performance indicators such as material toughness and impact strength. With the continuous improvement of material performance requirements in modern industry, especially in the fields of automobiles, building materials, and aerospace, the demand for testing the impact resistance of materials against gravel is becoming increasingly urgent, which in turn drives the continuous growth of market demand for gravel impact testing machines.

[0003] The existing patent (publication number: CN219065165U) discloses that "this utility model relates to a crushed stone impact testing machine, including a testing machine box. An air pump is fixedly connected to the left end face of the testing machine box. One side of the air pump is connected to an air pipe, and the other end of the air pipe is connected to a high-pressure nozzle. A feeding hopper is fixedly connected to the top of the testing machine box. A feeding pipe is connected to one side of the feeding hopper, and an electromagnetic valve is fixedly connected to one side of the feeding pipe. A fixed partition is fixedly connected to the inner side of the testing machine box. A dual-output shaft motor is fixedly connected to the inner side of the top face of the testing machine box. One end of the main shaft of the dual-output shaft motor is fixedly connected to a mounting turntable via a coupling. An adapter seat is rotatably connected to the other side of the mounting turntable. In use, this utility model not only allows for vertical rotation of the testing plate to adjust the angle, but also allows for adjustment of the tilt angle of the testing plate via a hydraulic push rod, enabling multi-angle testing, resulting in more comprehensive test results and ensuring the accuracy of the test results."

[0004] In the process of developing this application, the inventors discovered the following problems with the prior art: The impact tester for crushed stone uses a dual-shaft motor to drive the rotating disk and a hydraulic push rod to push the adapter seat to achieve angle adjustment. Although it can meet the needs of multiple angles, the transmission structure of the motor and hydraulic components lacks an impact-resistant protection structure. The connection between the motor output shaft and the rotating disk, and the hinge point between the hydraulic push rod and the adapter seat are prone to increased gaps and transmission jamming due to repeated impact reaction forces. Furthermore, the seals of the hydraulic push rod are prone to aging and leakage under long-term impact and vibration, resulting in a decrease in the accuracy of angle adjustment and thus affecting the accuracy of the test data.

[0005] Therefore, those skilled in the art have provided a crushing stone impact testing machine to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a stone impact testing machine. Through two sets of worm gears, different angles can be adjusted to simulate the stress state of the coating under different impact angles, meet the needs of diverse testing scenarios, and make the evaluation results more comprehensive. Furthermore, the worm gears have self-locking properties, and the angle can remain stable after adjustment.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A crushed stone impact testing machine includes a testing machine body. A protective box is fixedly installed on the upper side of one side of the testing machine body. An adjustment mechanism is installed inside the protective box. The adjustment mechanism includes a fixed plate. A first worm is rotatably installed on one side inside the fixed plate. A first worm wheel is rotatably installed on the side of the fixed plate near the testing machine body. A connecting frame is fixedly installed at the lower end of the first worm wheel. A second worm wheel is rotatably installed at the front end inside the connecting frame. A second worm is rotatably installed at the upper end of the front end inside the connecting frame. A connecting plate is fixedly installed at the rear end of the second worm gear. Multiple guide grooves are provided through one side of the connecting plate. A lead screw is rotatably installed at the upper end inside the connecting plate. A slider is threadedly connected to the outside of the lead screw. Rotating blocks are hinged at both ends of the slider. Clamping plates are hinged at opposite ends of the two rotating blocks.

[0008] Furthermore, the first worm gear is meshed with the first worm, and the second worm is meshed with the second worm gear.

[0009] Furthermore, the connecting plate is externally rotatably mounted inside the connecting frame, and one side of the fixing plate is fixedly mounted inside the protective box on the side away from the testing machine body.

[0010] Furthermore, the slider is externally slidably disposed inside the connecting plate, and a support plate is fixedly disposed on the side of the connecting plate near the testing machine body, and a test plate is disposed between the two clamping plates opposite each other.

[0011] Furthermore, multiple guide blocks are fixedly provided on the side of each of the two clamping plates near the connecting frame, and the external surfaces of the multiple guide blocks are slidably disposed inside multiple guide grooves.

[0012] Furthermore, a high-pressure nozzle is fixedly installed on one side of the testing machine body, and the high-pressure nozzle is externally fixed inside the protective box on the side away from the adjustment mechanism.

[0013] Furthermore, a collection box is slidably disposed at the front end of the testing machine body, and a filter screen is disposed inside the collection box.

[0014] This utility model has the following beneficial effects: This invention discloses a crushed stone impact testing machine. When it is necessary to adjust the tilt angle of the test plate, the operator rotates the first worm gear, causing the first worm wheel to rotate, which in turn causes the connecting frame to rotate around its axis, thereby adjusting the angle of the test plate. Alternatively, the operator can manually rotate the second worm gear, causing the second worm wheel to rotate, which drives the connecting plate to rotate inside the connecting frame, achieving fine adjustment of the test plate at another angle. This enables multi-degree-of-freedom adjustment of the test plate. Furthermore, the worm gear has a self-locking characteristic, preventing slippage even under high-pressure airflow impact and equipment vibration, ensuring the stability of the test plate angle during the test and thus improving data accuracy. Attached Figure Description

[0015] Figure 1 This is an isometric schematic diagram of the entire utility model; Figure 2 This is an isometric view of the adjustment mechanism of this utility model; Figure 3 This is a partial isometric view of the present invention near the first worm gear; Figure 4 This is an exploded isometric view of the present invention near the lead screw; Figure 5 This is an exploded isometric view of the present invention near the rotating block; Figure 6 This is an isometric view of the present invention near the filter screen.

[0016] Legend: 1. Testing machine body; 2. High-pressure nozzle; 3. Protection box; 4. Adjustment mechanism; 5. Collection box; 6. Filter screen; 401. Connecting frame; 402. First worm gear; 403. Fixing plate; 404. Connecting plate; 405. Second worm gear; 406. First worm wheel; 407. Test plate; 408. Clamping plate; 409. Guide groove; 410. Support plate; 411. Second worm wheel; 412. Lead screw; 413. Sliding block; 414. Rotating block; 415. Guide block. Detailed Implementation

[0017] 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.

[0018] Reference Figures 1-6 One embodiment provided by this utility model: A crushed stone impact testing machine includes a testing machine body 1. A protective box 3 is fixedly installed on the upper side of one side of the testing machine body 1. An adjustment mechanism 4 is installed inside the protective box 3. The adjustment mechanism 4 includes a fixed plate 403. A first worm gear 402 is rotatably installed on one side inside the fixed plate 403. A first worm wheel 406 is rotatably installed on the side of the fixed plate 403 near the testing machine body 1. A connecting frame 401 is fixedly installed at the lower end of the first worm wheel 406. A second worm wheel 411 is rotatably installed at the front end inside the connecting frame 401. A second worm gear 405 is rotatably installed at the upper end of the front end inside the connecting frame 401. A connecting plate 404 is fixedly installed at the rear end of the second worm gear 411. Multiple guide grooves 409 are provided through one side of the connecting plate 404. A lead screw 412 is rotatably installed at the upper end of the connecting plate 404. A slider 413 is threadedly connected to the outside of the lead screw 412. Rotating blocks 414 are hinged at both ends of the slider 413. Clamping plates 408 are hinged at opposite ends of the two rotating blocks 414. The first worm gear 406 and the first worm 402 are meshed and connected. The second worm 405 and the second worm gear 411 are meshed and connected. The connecting plate 404 is externally rotatably mounted inside the connecting frame 401. The fixed plate 403 is fixedly mounted on one side inside the protective box 3 away from the testing machine body 1. The slider 413 is externally slidably mounted inside the connecting plate 404. The supporting plate 410 is fixedly mounted on the side of the connecting plate 404 near the testing machine body 1. The test plate 407 is arranged between the two clamping plates 408. Multiple guide blocks 415 are fixedly mounted on the side of the two clamping plates 408 near the connecting frame 401. The multiple guide blocks 415 are externally slidably mounted inside multiple guide grooves 409. A high-pressure nozzle 2 is fixedly mounted on one side of the testing machine body 1. The high-pressure nozzle 2 is externally fixedly mounted on the side of the protective box 3 away from the adjusting mechanism 4. A collection box 5 is slidably mounted at the front end of the testing machine body 1. A filter screen 6 is installed inside the collection box 5. Specifically, before the test, the power supply of the test machine body 1 is turned on. Then, the paint coating to be tested is evenly applied to the surface of the test plate 407. After the coating dries, the test plate 407 is placed stably on the upper end of the support plate 410. Then, the operator manually rotates the lead screw 412 to make it rotate inside the connecting plate 404. Since the lead screw 412 is threadedly connected to the slider 413, and the inner wall of the connecting plate 404 can limit the slider 413, the slider 413 can only slide vertically inside the connecting plate 404 when the lead screw 412 rotates. During the sliding process, the slider 413 will drive the rotating blocks 414 hinged at both ends to move synchronously, causing the two clamping plates 408 to move closer to each other along the guide groove 409 through the guide block 415 on one side, and finally achieve a stable clamping of both sides of the test plate 407. This effectively prevents the test plate 407 from shifting or vibrating during the impact, ensures that the impact position of the crushed stone is consistent with the preset test area, and improves the reliability of the test results. Subsequently, the protective cover on the top of the protective box 3 is closed, and the air pump built into the test machine body 1 is started through the control panel at the front of the test machine body 1. The air pump generates high-pressure gas to push the crushed stone in the storage bin, so that the crushed stone is sprayed out at high speed through the high-pressure nozzle 2. The crushed stone will form a simulated impact on the paint coating on the surface of the test plate 407. The closed protective box 3 can effectively block the crushed stone from splashing, ensuring operational safety. The crushed stone after impact falls into the bottom collection box 5. After being filtered by the filter screen 6, the intact crushed stone is retained for recycling. The broken debris and coating residue will be separated and removed, which not only reduces the consumption of consumables, but also avoids debris pollution of the environment. After the impact test is completed, the clamp 408 is loosened and the test plate 407 is taken out. The impact resistance of the paint coating is evaluated by directly observing the peeling area and scratch depth of the coating surface. When it is necessary to adjust the tilt angle of the test plate 407, the operator manually rotates the first worm 402. Since the first worm 402 is meshed with the first worm wheel 406, the rotation of the first worm 402 will cause the first worm wheel 406 to rotate. The rotation of the first worm wheel 406 will cause the connecting frame 401 to rotate around the axis of the first worm wheel 406. A pointer is provided on one side of the upper end of the first worm wheel 406, and an angle scale line is provided on the upper end of the connecting frame 401, which makes it convenient for the operator to adjust the angle of the test plate 407. If it is necessary to adjust another angle of the test plate 407, the operator manually rotates the second worm 405. Since the second worm 405 is meshed with the second worm wheel 411, the rotation of the second worm wheel 411 will drive the connecting plate 404 to rotate around the axis of the second worm wheel 411. A pointer is provided on one side of the front end of the second worm wheel 411, and an angle scale line is provided on the front end of the connecting plate 404, which makes it convenient for the operator to observe and adjust. It should be noted that the testing machine body 1 is existing equipment. The control panel at the front of the testing machine body 1 is equipped with an air pump pressure adjustment knob, a crushed stone spray speed adjustment button, and a test time setting key. By rotating the air pump pressure adjustment knob, the air pump pressure can be controlled within the range of 0.5-1.2MPa to meet the requirements of different impact strength tests. By pressing the crushed stone spray speed adjustment button, the spray speed can be switched between 20-50m / s. By using the test time setting key, the spray duration of a single test can be preset, ranging from 10-60s. This technology is already a publicly available technical solution; therefore, its specific structure, model, and working principle will not be described in detail in this article. The high-pressure nozzle 2 is connected to the interface on one side of the testing machine body 1 via a flange. A high-pressure resistant rubber sealing ring is provided between the flanges. The sealing ring is made of nitrile rubber and is uniformly tightened with hexagonal bolts. This not only ensures the stability of the connection between the high-pressure nozzle 2 and the testing machine body 1, but also effectively prevents high-pressure gas leakage, ensures the stability of the stone spraying speed, and improves the reliability of the test. All standard parts used in this application can be purchased from the market, and special-shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt mature bolts, rivets, welding and other conventional methods in the prior art. Mechanical parts, components and equipment adopt conventional models in the prior art. Therefore, they will not be described in detail. All contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0019] Working principle: When conducting the test, first connect the power supply to the test machine body 1, then attach the paint coating to be tested to the test plate 407, and then place the test plate 407 on the upper end of the support plate 410. Next, the operator manually rotates the lead screw 412 to rotate inside the connecting plate 404. The rotation of the lead screw 412 will drive the slider 413 to slide inside the connecting plate 404. When the slider 413 slides, it will drive the rotating block 414 hinged to it to move synchronously, so that the rotating block 414 drives the clamping plate 408 to slide relative to each other, so that the guide block 415 on one side of the clamping plate 408 slides synchronously relative to each other inside the guide groove 409, thereby achieving the clamping of the test plate 407. If it is necessary to adjust the lateral tilt angle of the test plate 407, the operator rotates the first worm 402. Since the first worm 402 and the second worm wheel 411 are meshed, the rotation of the first worm 402 will drive the first worm wheel 406 to rotate. The first worm wheel 406 will drive the connecting frame 401 to rotate around the axis of the first worm wheel 406. Alternatively, the second worm 405 can be manually rotated. The rotation of the second worm 405 will drive the connecting plate 404 to rotate around the axis of the second worm wheel 411, thereby achieving another angle adjustment of the test plate 407. During the test, the protective cover on the top of the protective box 3 is closed. Then, the air pump inside the test machine body 1 is started. The gas generated by the air pump will push the gravel inside the test machine body 1, so that the gravel is sprayed out through the high-pressure nozzle 2 to simulate the gravel impact scenario. The sprayed gravel will impact the paint on the surface of the test board 407. The closed protective box 3 can prevent the gravel from splashing. After the impact, the gravel falls into the collection box 5 at the bottom. After being filtered by the filter screen 6, the broken gravel and the intact gravel can be separated, which is convenient for the gravel to be recycled and reused. After the impact is completed, the test board 407 can be taken out. The operator can judge by observing the paint peeling off the surface of the test board 407.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A crushed stone impact testing machine, comprising a testing machine body (1), characterized in that: A protective box (3) is fixedly installed on one side of the upper end of the testing machine body (1). An adjustment mechanism (4) is installed on one side inside the protective box (3). The adjustment mechanism (4) includes a fixed plate (403). A first worm (402) is rotatably installed on one side inside the fixed plate (403). A first worm wheel (406) is rotatably installed on the side of the fixed plate (403) near the testing machine body (1). A connecting frame (401) is fixedly installed at the lower end of the first worm wheel (406). A second worm wheel (411) is rotatably installed at the front end inside the connecting frame (401). A second worm (405) is rotatably installed at the upper end of the front end inside the connecting frame (401). The second worm gear (411) is fixedly provided with a connecting plate (404) at its rear end. A plurality of guide grooves (409) are provided through one side of the connecting plate (404). A lead screw (412) is rotatably provided at the upper end of the connecting plate (404). A slider (413) is threadedly connected to the outside of the lead screw (412). Rotating blocks (414) are hinged at both ends of the slider (413). Clamping plates (408) are hinged at opposite ends of the two rotating blocks (414).

2. The impact testing machine for crushed stone resistance according to claim 1, characterized in that: The first worm wheel (406) is meshed with the first worm (402), and the second worm (405) is meshed with the second worm wheel (411).

3. The impact testing machine for crushed stone resistance according to claim 1, characterized in that: The connecting plate (404) is externally rotatably disposed inside the connecting frame (401), and the fixing plate (403) is fixedly disposed on one side inside the protective box (3) away from the test machine body (1).

4. The impact testing machine for crushed stone resistance according to claim 1, characterized in that: The slider (413) is externally slidably disposed inside the connecting plate (404). A support plate (410) is fixedly disposed on the side of the connecting plate (404) near the test machine body (1). A test plate (407) is disposed between the two clamping plates (408).

5. The impact testing machine for crushed stone resistance according to claim 1, characterized in that: Multiple guide blocks (415) are fixedly provided on the side of each of the two clamping plates (408) near the connecting frame (401), and the multiple guide blocks (415) are slidably disposed inside multiple guide grooves (409) respectively.

6. The impact testing machine for crushed stone resistance according to claim 1, characterized in that: A high-pressure nozzle (2) is fixedly installed on one side of the main body (1) of the testing machine. The high-pressure nozzle (2) is fixedly installed on the outside of the protective box (3) on the side away from the adjustment mechanism (4).

7. The impact testing machine for crushed stone resistance according to claim 1, characterized in that: A collection box (5) is slidably provided at the front end of the main body (1) of the testing machine, and a filter screen (6) is provided inside the collection box (5).

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