A high load capacity pallet load capacity testing apparatus

Abstract

The present application relates to the technical field of support component testing, in particular to a high-bearing-capacity tray bearing capacity testing equipment, which comprises a cabinet, a supporting unit, a testing unit, a thrust unit and a locking unit, the supporting unit is fixedly arranged on the top of the cabinet and used for supporting the tray, and the testing unit is fixedly arranged on the top of the cabinet and located in the inside of the supporting unit. After the positive pressure bearing capacity test of the tray is completed, the load plate of the testing unit is moved along the path trajectory of the arc groove by the thrust unit, so that the adjusting load plate is overturned during the movement, and the adjusting load plate is overturned together with the hydraulic oil cylinder through the connection of the vertical plate, the transfer plate and the floating plate. At this time, the output rod axis of the hydraulic oil cylinder and the bottom joint surface of the tray change from the original vertical state to the inclined state, so that the bias bearing test can be realized for the tray, and the test results can more comprehensively reflect the bearing capacity of the tray.

Description

Technical Field

[0001] This invention relates to the field of support component testing technology, specifically to a high-load-bearing capacity pallet testing device. Background Technology

[0002] As coal mining extends deeper into the mine, the geological conditions underground become more complex and severe, which places higher demands on support tools. Some inferior anchor bolts and pallet systems are prone to problems such as bolt breakage and pallet failure in this environment, seriously threatening the safe production of the working face. Therefore, in the production of pallets, it is necessary to test the load-bearing capacity of the pallets to ensure that products that meet the standards are used.

[0003] Referring to a Chinese patent application with application number 202411413843.4, a strength testing device and method for an octagonal gasket are disclosed. This method enables multi-point testing on both sides of the gasket, which can more comprehensively reflect the hardness of the gasket and avoid affecting the accuracy of the gasket hardness test. After using the above device to test the load-bearing capacity of a pallet, it was found that due to various assembly errors during the actual installation of the pallet, the tensile force of the anchor rod on the pallet is not completely perpendicular to the joint surface of the pallet. Therefore, the load-bearing capacity test of the pallet cannot be limited to the force test when the anchor rod is perpendicular to the pallet. It is necessary to combine actual use and test the eccentric load-bearing capacity of the pallet. To this end, we propose a high load-bearing capacity pallet load-bearing capacity testing device to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides the following technical solution: a high load-bearing capacity pallet load-bearing capacity testing device, comprising:

[0005] Server rack;

[0006] The support unit is fixedly installed on the top of the cabinet and is used to support the tray;

[0007] The test unit is fixedly installed on the top of the cabinet and located inside the support unit. The test unit is used for testing the load-bearing capacity of the pallet.

[0008] The thrust unit is fixedly installed at one end of the top of the cabinet and is used to adjust the test angle of the test unit.

[0009] The locking unit is fixedly installed inside the test unit and is used for angular positioning of the test unit.

[0010] As a preferred embodiment of the present invention, the support unit includes:

[0011] Metal support plates are symmetrically fixed to the top of the cabinet along the central axis of the cabinet;

[0012] A metal top plate is fixedly installed on top of two metal support plates;

[0013] The waist groove is a through-hole opening located in the middle of the top of the metal roof panel.

[0014] As a preferred embodiment of the present invention, the test unit includes:

[0015] The mounting bracket is fixedly installed on the top of the cabinet and located between two metal support plates;

[0016] The arc groove runs through the two sides of the fixed base near the two metal support plates;

[0017] The adjustable carrier plate is movably set inside the fixed base and located between two arc grooves;

[0018] The axles are fixedly installed at both ends of the bottom of the adjusting plate by fixing angle brackets and are arranged parallel to each other. The axles extend into the interior of the two arc grooves.

[0019] A grooved wheel is rotatably mounted on both ends of the outer wall of two axles via bearings. The specifications of the grooved wheel are adapted to the specifications of the arc groove, and the outer wall of the grooved wheel is in rolling connection with the inner wall of the arc groove.

[0020] Two upright plates are symmetrically fixedly installed on top of the fixing base along the central axis of the fixing base.

[0021] The transfer plate is fixedly installed on top of the two upright plates;

[0022] A floating plate is installed on top of the transfer plate;

[0023] A hydraulic cylinder is fixedly installed on the top of the floating plate, and the upper part of the outer wall of the output rod of the hydraulic cylinder is threaded.

[0024] As a preferred embodiment of the present invention, the thrust unit includes:

[0025] Two hinged mounts are symmetrically fixed at one end of the top of the cabinet along the central axis of the cabinet.

[0026] The cylinder is hinged between two hinge seats;

[0027] Two connecting blocks are symmetrically fixedly installed on one end of the adjusting plate near the cylinder, with the central axis of the adjusting plate in place.

[0028] A pivot pin is fixedly installed between two connecting blocks, and the output rod end of the cylinder is hinged to the outer wall of the pivot pin via a spherical bearing.

[0029] As a preferred embodiment of the present invention, the locking unit includes:

[0030] A linear bearing is fixedly installed inside the transfer plate and near the four corners of the transfer plate, and the linear bearing passes through the top and bottom of the transfer plate;

[0031] The telescopic rod is slidably installed inside the linear bearing, and its top is fixedly connected to the bottom of the floating plate by bolts;

[0032] Sheet metal brackets are symmetrically distributed around the periphery of the two uprights and are fixedly installed on the lower part of the outer wall of the two telescopic rods at the corresponding positions;

[0033] The arc-shaped internal rack is fixedly installed on the bottom inner side of the sheet metal bracket;

[0034] An arc-shaped external rack is fixedly installed on the inner walls of the two sides of the fixed base, and is located at the top of the opening of the arc groove. The arc-shaped external rack is located at the top of the arc-shaped internal rack, and its specifications are adapted to the arc-shaped internal rack. The center of the arc-shaped external rack is concentric with the center of the arc groove.

[0035] As a preferred embodiment of the present invention, the locking unit further includes:

[0036] The spring is fixedly installed between the top of the sheet metal bracket and the bottom of the transfer plate;

[0037] A straightening rod is fixedly installed on the top of the sheet metal bracket and located inside the spring. The straightening rod moves through the bottom and top of the transfer plate and slides in connection with the inner wall of the through hole of the transfer plate.

[0038] As a preferred embodiment of the present invention, the test unit further includes:

[0039] The limiting hooks are symmetrically fixed at both ends of the top of the floating plate along the central axis of the floating plate and extend to the bottom of the transfer plate. The limiting hooks are located between the two upright plates. The distance between the inner side of the bottom of the limiting hook and the bottom of the transfer plate is adapted to the distance between the inner arc-shaped toothed rack and the outer arc-shaped toothed rack.

[0040] As a preferred embodiment of the present invention, the center of the arc groove is concentric with the top center of the waist groove.

[0041] As a preferred embodiment of the present invention, the test unit further includes:

[0042] A metal washer, which is fitted around the hydraulic cylinder, is made of high manganese steel.

[0043] A locking nut is fitted around the output rod of the hydraulic cylinder and connected to the threaded connection on the outer wall of the hydraulic cylinder. The bottom of the locking nut is in contact with the top of the metal washer.

[0044] As a preferred embodiment of the present invention, the gap between the groove wall of the waist groove and the outer wall of the output rod of the hydraulic cylinder is 1.5 to 2 mm.

[0045] Compared with the prior art, the beneficial effects of the present invention are:

[0046] 1. In this invention, after the positive pressure bearing capacity test of the pallet is completed, the test unit pushes the carrier plate of the test unit to move along the path trajectory of the arc groove through the thrust unit, causing the carrier plate to flip during the movement. The flipping of the carrier plate drives the hydraulic cylinder to flip together through the connection of the upright plate, the transfer plate and the floating plate. At this time, the output rod axis of the hydraulic cylinder and the bottom joint surface of the pallet change from the original vertical state to the inclined state, which can realize the bias pressure bearing capacity test of the pallet. The test results more comprehensively reflect the bearing capacity of the pallet.

[0047] 2. In this invention, after the output rod of the hydraulic cylinder drives the bottom of the metal washer to contact the top of the tray, as the output rod of the hydraulic cylinder continues to move downward, the cylinder body of the hydraulic cylinder is subjected to a reverse pulling force and moves upward, driving the floating plate to move upward. This causes the inner walls of the four linear bearings to slide upward, further driving the two sheet metal brackets to move upward together, so that the arc-shaped inner rack and arc-shaped outer rack mesh, positioning the floating plate, the transfer plate, the upright plate, and the adjusting plate, etc. There is no need for the output rod of the cylinder to provide the adjusted positioning of the adjusting plate. The cylinder will not be under high load, thus ensuring the service life of the cylinder as much as possible and extending the testing life of the equipment. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0049] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0050] Figure 3 This is a schematic diagram of the support unit in this invention;

[0051] Figure 4 In this invention Figure 3 A magnified structural diagram of part A;

[0052] Figure 5 This is a cross-sectional structural diagram of the fixing base in this invention;

[0053] Figure 6 This is a schematic diagram of the planar structure of the test unit in this invention;

[0054] Figure 7 In this invention Figure 6 A schematic diagram of the three-dimensional structure;

[0055] Figure 8 This is a partial structural diagram of the test unit in this invention;

[0056] Figure 9 This is a schematic diagram of the locking unit in this invention;

[0057] Figure 10 In this invention Figure 7 A schematic diagram of the planar structure;

[0058] Figure 11 In this invention Figure 3 A magnified structural diagram of part B.

[0059] In the diagram: 100, cabinet; 200, support unit; 201, metal support plate; 202, metal top plate; 203, waist groove; 300, test unit; 301, fixed seat; 302, arc groove; 303, adjusting carrier plate; 304, wheel axle; 305, grooved wheel; 306, upright plate; 307, transfer plate; 308, floating plate; 309, hydraulic cylinder; 3010, metal washer; 3011, locking nut; 3012, limit hook; 400, thrust unit; 401, hinge seat; 402, cylinder; 403, connecting block; 404, shaft pin; 500, locking unit; 501, linear bearing; 502, telescopic rod; 503, sheet metal bracket; 504, arc-shaped internal rack; 505, arc-shaped external rack; 506, spring; 507, straightening rod. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] Please see Figures 1-10 The technical solution provided by the present invention specifically includes the following embodiments:

[0062] A high load-bearing capacity pallet load-bearing capacity testing device includes a cabinet 100, a support unit 200, a testing unit 300, a thrust unit 400, and a locking unit 500. The support unit 200 is fixedly installed on the top of the cabinet 100 for supporting the pallet. The testing unit 300 is fixedly installed on the top of the cabinet 100 and located inside the support unit 200. The testing unit 300 is used for testing the load-bearing capacity of the pallet. The thrust unit 400 is fixedly installed at one end of the top of the cabinet 100 for adjusting the testing angle of the testing unit 300. The locking unit 500 is fixedly installed inside the testing unit 300 for angular positioning of the testing unit 300.

[0063] For further details, please refer to [link / reference]. Figure 2 as well as Figure 11 As shown:

[0064] The support unit 200 includes a metal support plate 201, a metal top plate 202, and a waist groove 203. The metal support plate 201 is symmetrically fixedly installed on the top of the cabinet 100 along the central axis of the cabinet 100. The metal top plate 202 is fixedly installed on the top of the two metal support plates 201. The waist groove 203 is opened through the middle of the top of the metal top plate 202.

[0065] Specifically, by setting two metal support plates 201 to fix the metal top plate 202 to the top of the cabinet 100, before testing, the tray to be tested can be placed on top of the metal top plate 202, and the metal top plate 202 provides support for the tray to further ensure the stability of the tray.

[0066] For further details, please refer to [link / reference]. Figures 4 to 11 As shown:

[0067] The test unit 300 includes a fixed base 301, an arc groove 302, an adjusting plate 303, a wheel axle 304, a grooved wheel 305, a vertical plate 306, a transfer plate 307, a floating plate 308, a hydraulic cylinder 309, a metal washer 3010, a locking nut 3011, and a limit hook 3012. The fixed base 301 is fixedly installed on the top of the cabinet 100 and located between two metal support plates 201. The arc groove 302 is formed through the fixed base 301 on both sides near the two metal support plates 201. The center of the arc groove 302 is concentric with the top center of the groove 203. The adjusting plate 303 is movably disposed inside the fixed base 301 and located between two arc grooves 302. Axles 304 are fixedly installed at both ends of the bottom of the adjusting plate 303 via fixed angle brackets and are arranged parallel to each other. Both axles 304 extend into the interior of the two arc grooves 302. Grooved wheels 305 are rotatably mounted on the outer ends of the outer walls of the two axles 304 via bearings. The specifications of the grooved wheels 305 are compatible with the specifications of the arc grooves 302, and the outer wall of the grooved wheels 305 is in rolling contact with the inner wall of the arc grooves 302. A vertical plate 306 is symmetrically fixed to the fixed base 301 about the central axis of the fixed base 301. At the top of seat 301, there are two upright plates 306. A transfer plate 307 is fixedly installed on top of the two upright plates 306. A floating plate 308 is set on top of the transfer plate 307. A hydraulic cylinder 309 is fixedly installed on top of the floating plate 308. The upper part of the outer wall of the output rod of the hydraulic cylinder 309 is threaded. The gap between the groove wall of the waist groove 203 and the outer wall of the output rod of the hydraulic cylinder 309 is 1.5-2mm. A metal washer 3010 is sleeved on the periphery of the hydraulic cylinder 309. The metal washer 3010 is made of high manganese steel. A locking nut 3011 is sleeved on the hydraulic cylinder 309. The output rod of the hydraulic cylinder 309 is connected to the threaded connection on the outer wall of the hydraulic cylinder 309. The bottom of the locking nut 3011 fits against the top of the metal washer 3010. The limit hook 3012 is symmetrically fixed at both ends of the top of the floating plate 308 along the central axis of the floating plate 308 and extends to the bottom of the transfer plate 307. The limit hook 3012 is located between the two vertical plates 306. The distance between the inner side of the bottom of the limit hook 3012 and the bottom of the transfer plate 307 is adapted to the distance between the arc-shaped inner rack 504 and the arc-shaped outer rack 505.

[0068] Specifically, the test tray is placed on top of the metal top plate 202, outside the opening of the waist groove 203. The hydraulic cylinder 309 is activated, causing its output rod to extend upwards, passing through the bottom of the waist groove 203 and then exiting through the top of the center hole of the tray. A metal washer 3010 is then placed around the hydraulic cylinder 309, resting on the top of the tray under gravity. A locking nut 3011 is then threaded onto the outside of the hydraulic cylinder 309, ensuring a small gap between the bottom of the locking nut 3011 and the top of the hydraulic cylinder 309. The test is then conducted via an external computer. The working parameters of the hydraulic cylinder 309 are set so that the output rod of the hydraulic cylinder 309 moves downward according to the test torque, which in turn drives the metal washer 3010 and the locking nut 3011 to move downward together. The locking nut 3011 moves downward and gradually moves towards the top of the metal washer 3010 until they are in contact with each other, and then applies a downward compressive force to the metal washer 3010. The metal washer 3010 further applies a downward compressive force to the top of the pallet, thereby providing a positive pressure load test for the pallet. By observing whether the pallet shows deformation or tearing, it is determined whether the positive pressure load strength of the pallet is qualified.

[0069] For further details, please refer to [link / reference]. Figure 3 , Figure 7 , Figure 8 as well as Figure 10 As shown:

[0070] The thrust unit 400 includes a hinge seat 401, a cylinder 402, a connecting block 403, and a shaft pin 404. The hinge seats 401 are symmetrically fixedly installed at one end of the top of the cabinet 100 along the central axis of the cabinet 100, and there are two of them. The cylinder 402 is hinged between the two hinge seats 401. The connecting blocks 403 are symmetrically fixedly installed at one end of the adjusting plate 303 near the cylinder 402 along the central axis of the adjusting plate 303, and there are two of them. The shaft pin 404 is fixedly installed between the two connecting blocks 403. The output rod end of the cylinder 402 is hinged to the outer wall of the shaft pin 404 through a spherical bearing.

[0071] Specifically, the output rod of cylinder 402 extends outward, and under the connection of connecting block 403 and shaft pin 404, pushes the adjusting plate 303 to move away from cylinder 402. During the movement of the adjusting plate 303, the wheel axle 304 and grooved wheel 305 move together. The grooved wheel 305 is subject to the path matching relationship with the arc groove 302, causing the adjusting plate 303 to move along the path trajectory of the arc groove 302. This causes the adjusting plate 303 to flip during the movement. The flipping of the adjusting plate 303, through the connection of vertical plate 306, intermediate plate 307 and floating plate 308, drives the hydraulic cylinder 309 to flip together. At this time, the output rod axis of the hydraulic cylinder 309 and the bottom mating surface of the tray are connected by... The original vertical state is changed to an inclined state. Then, the working parameters of the hydraulic cylinder 309 are set by an external computer, causing the output rod of the hydraulic cylinder 309 to move downward according to the test torque. This further drives the metal washer 3010 and the locking nut 3011 to move downward together. The locking nut 3011 moves downward and gradually moves towards the top of the metal washer 3010 until they are in contact with each other. Then, a downward compressive force is applied to the metal washer 3010. Furthermore, the metal washer 3010 applies a compressive force along the axial direction of the output rod of the hydraulic cylinder 309 to the top of the pallet, thereby providing a bias load test for the pallet. By observing whether the pallet shows deformation or tearing, the bias load strength of the pallet is judged to be qualified.

[0072] For further details, please refer to [link / reference]. Figures 5-9 As shown:

[0073] The locking unit 500 includes a linear bearing 501, a telescopic rod 502, a sheet metal bracket 503, an arc-shaped internal rack 504, and an arc-shaped external rack 505. The linear bearing 501 is fixedly installed inside the transfer plate 307, near the four corners of the transfer plate 307, and passes through the top and bottom of the transfer plate 307. The telescopic rod 502 is slidably installed inside the linear bearing 501, and its top is fixedly connected to the bottom of the floating plate 308 by bolts. The sheet metal brackets 503 are symmetrically distributed. Around the two upright plates 306, and fixedly installed on the lower outer wall of the two telescopic rods 502 at corresponding positions, the arc-shaped inner rack 504 is fixedly installed on the bottom inner side of the sheet metal bracket 503, and the arc-shaped outer rack 505 is fixedly installed on the inner walls of the two sides of the fixed base 301 that are close to each other, and is located at the top of the opening of the arc groove 302. The arc-shaped outer rack 505 is located at the top of the arc-shaped inner rack 504, and its specifications are compatible with the arc-shaped inner rack 504. The center of the arc-shaped outer rack 505 is concentric with the center of the arc groove 302.

[0074] Specifically, when the output rod of the hydraulic cylinder 309 moves downward, causing the bottom of the metal washer 3010 to contact the top of the tray, as the output rod of the hydraulic cylinder 309 continues to move downward, the cylinder body of the hydraulic cylinder 309 is subjected to a reverse pulling force and moves upward, further causing the floating plate 308 to move upward. The upward movement of the floating plate 308 also causes the two limit hooks 3012 to move together until the bottom inner sides of the two limit hooks 3012 hook onto the bottom surface of the transfer plate 307, thereby limiting the upward movement distance of the floating plate 308 and preventing the floating plate 308 from moving upward indefinitely. At the same time, the upward movement of the floating plate 308 also causes the four telescopic rods 502 to slide upward along the inner walls of the four linear bearings 501. The upward sliding of the four telescopic rods 502 causes the two sheet metal brackets 503 to move upward. The sheet metal bracket 503 moves upward together, causing the arc-shaped inner rack 504 to move upward, so that the arc-shaped inner rack 504 and the arc-shaped outer rack 505 mesh together. It should be noted that when the bottom inner side of the limit hook 3012 contacts the bottom surface of the transfer plate 307, the arc-shaped inner rack 504 just meshes with the arc-shaped outer rack 505. Due to the meshing action of the arc-shaped inner rack 504 and the arc-shaped outer rack 505, the floating plate 308, the transfer plate 307, the upright plate 306 and the adjusting carrier plate 303 are positioned. That is to say, during the test, the output rod of the cylinder 402 does not need to provide the adjusted positioning function of the adjusting carrier plate 303. Therefore, the cylinder 402 will not be under high load, so as to ensure the service life of the cylinder 402 and extend the testing life of the equipment.

[0075] For further details, please refer to [link / reference]. Figure 9 As shown:

[0076] The locking unit 500 also includes a spring 506 and a straightening rod 507. The spring 506 is fixedly installed between the top of the sheet metal bracket 503 and the bottom of the transfer plate 307. The straightening rod 507 is fixedly installed on the top of the sheet metal bracket 503 and is located inside the spring 506. The straightening rod 507 moves through the bottom and top of the transfer plate 307 and is slidably connected to the inner wall of the through hole of the transfer plate 307.

[0077] Specifically, during the upward movement of the sheet metal bracket 503, the straightening rod 507 also moves along with it. Since the outer wall of the straightening rod 507 is slidably connected to the inner wall of the through hole of the transfer plate 307, the straightening rod 507 will not interfere with the main body of the transfer plate 307 during its upward movement, thus ensuring the smooth movement of the straightening rod 507. At the same time, the upward movement of the sheet metal bracket 503 causes the spring 506 to compress and store force, so that after the test is completed, the output rod of the hydraulic cylinder 309 returns to its upward position, and the upward pulling force on the floating plate 308 disappears. Therefore, the rebound force of the spring 506 is released, pushing the telescopic rod 502, the sheet metal bracket 503, the arc-shaped inner rack 504, and the straightening rod 507 to return to their downward position. This causes the arc-shaped inner rack 504 and the arc-shaped outer rack 505 to disengage, making it easier for the thrust unit 400 to drive the test unit 300 to return to its position, so as to facilitate the subsequent positive pressure load test of the pallet.

[0078] This solution describes a high-load-bearing capacity pallet testing device that, during operation, includes the following processes:

[0079] Before testing: Place the tray to be tested on top of the metal top plate 202, and outside the opening of the waist groove 203. Start the hydraulic cylinder 309, so that its output rod extends upward, passes through the bottom of the waist groove 203, and then passes through the top of the center hole of the tray. Then put the metal washer 3010 on the outside of the hydraulic cylinder 309. The metal washer 3010 rests on the top of the tray under the action of gravity. Then screw the locking nut 3011 on the outside of the hydraulic cylinder 309 through the thread, and ensure that a small gap is left between the bottom of the locking nut 3011 and the top of the hydraulic cylinder 309.

[0080] The testing process includes both positive pressure load testing and negative pressure load testing of the pallet.

[0081] First, the positive pressure load test of the pallet is performed: the working parameters of the hydraulic cylinder 309 are set by an external computer, so that the output rod of the hydraulic cylinder 309 moves downward according to the test torque, which further drives the metal washer 3010 and the locking nut 3011 to move downward together. The locking nut 3011 moves downward and gradually moves towards the top of the metal washer 3010 until they are in contact with each other. Then, a downward compressive force is applied to the metal washer 3010, and the metal washer 3010 further applies a downward compressive force to the top of the pallet, thereby providing a positive pressure load test for the pallet. By observing whether the pallet shows deformation or tearing, it is determined whether the positive pressure load strength of the pallet is qualified.

[0082] Pallet bias load test: The cylinder 402 is activated, causing its output rod to extend outwards. Further, under the connection of the connecting block 403 and the shaft pin 404, the adjusting plate 303 is pushed away from the cylinder 402. During this movement, the adjusting plate 303 drives the axle 304 and the grooved wheel 305 to move together. The grooved wheel 305, due to its path matching with the arc groove 302, causes the adjusting plate 303 to move along the path of the arc groove 302. This causes the adjusting plate 303 to flip during its movement. The flipping of the adjusting plate 303, through the connection of the upright plate 306, the transfer plate 307, and the floating plate 308, drives the hydraulic cylinder 309 to flip as well. At this time, the output rod axis of the hydraulic cylinder 309 is aligned with the bottom of the pallet. The mating surfaces change from a perpendicular state to an inclined state. Then, the working parameters of the hydraulic cylinder 309 are set by an external computer, causing the output rod of the hydraulic cylinder 309 to move downward according to the test torque. This further drives the metal washer 3010 and the locking nut 3011 to move downward together. The locking nut 3011 moves downward and gradually approaches the top of the metal washer 3010 until they are in contact. Then, a downward compressive force is applied to the metal washer 3010. Furthermore, the metal washer 3010 applies a compressive force along the axial direction of the output rod of the hydraulic cylinder 309 to the top of the pallet, thereby providing a bias load test for the pallet. By observing whether the pallet shows deformation or tearing, the positive pressure load strength of the pallet is judged to be qualified.

[0083] During the test, this equipment also incorporates a locking unit 500 to protect cylinder 402 from damage caused by high load conditions. Specifically:

[0084] When the output rod of hydraulic cylinder 309 moves downward, causing the bottom of metal washer 3010 to contact the top of the tray, as the output rod of hydraulic cylinder 309 continues to move downward, the cylinder body of hydraulic cylinder 309 is pulled upward by a reverse force, further driving floating plate 308 upward. The upward movement of floating plate 308 also drives the two limit hooks 3012 to move together until the bottom inner sides of the two limit hooks 3012 hook onto the bottom surface of transfer plate 307, thereby limiting the upward movement distance of floating plate 308 and preventing floating plate 308 from moving upward indefinitely. At the same time, the upward movement of floating plate 308 also drives four telescopic rods 502 to slide upward along the inner wall of four linear bearings 501. The upward sliding of the four telescopic rods 502 drives the two sheet metal brackets 503 upward. The sheet metal bracket 503 moves upward, causing the arc-shaped inner rack 504 to move upward, so that the arc-shaped inner rack 504 and the arc-shaped outer rack 505 mesh together. It should be noted that when the bottom inner side of the limit hook 3012 contacts the bottom surface of the transfer plate 307, the arc-shaped inner rack 504 just meshes with the arc-shaped outer rack 505. Due to the meshing action of the arc-shaped inner rack 504 and the arc-shaped outer rack 505, the floating plate 308, the transfer plate 307, the upright plate 306 and the adjusting carrier plate 303 are positioned. That is to say, during the test, the output rod of the cylinder 402 does not need to provide the adjusted positioning function for the adjusting carrier plate 303. Therefore, the cylinder 402 will not be under high load, so as to ensure the service life of the cylinder 402 and extend the test life of the equipment.

[0085] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A high-load-bearing capacity pallet load-bearing capacity testing device, characterized in that: include: Server rack (100); A support unit (200) is fixedly installed on the top of the cabinet (100) for supporting the tray. The support unit (200) includes: Metal support plate (201) is symmetrically fixedly installed on the top of the cabinet (100) along the central axis of the cabinet (100); A metal top plate (202) is fixedly installed on top of two metal support plates (201); A waist groove (203) is formed through the top middle of the metal top plate (202); A test unit (300) is fixedly installed on the top of the cabinet (100) and located inside the support unit (200). The test unit (300) is used for pallet load-bearing capacity testing. The test unit (300) includes: The mounting bracket (301) is fixedly installed on the top of the cabinet (100) and located between two metal support plates (201); The arc groove (302) is formed through the two sides of the fixed base (301) near the two metal support plates (201); The adjusting carrier plate (303) is movably disposed inside the fixed base (301) and located between the two arc grooves (302); The axles (304) are fixedly installed at both ends of the bottom of the adjusting plate (303) by fixing angle brackets and are arranged parallel to each other. The axles (304) extend into the interior of the two arc grooves (302). The grooved wheel (305) is rotatably mounted on both ends of the outer wall of the two wheel shafts (304) via bearings. The specifications of the grooved wheel (305) are adapted to the specifications of the arc groove (302), and the outer wall of the grooved wheel (305) is in rolling connection with the inner wall of the arc groove (302). The upright plate (306) is symmetrically fixed on the top of the fixed base (301) with respect to the central axis of the fixed base (301), and there are two upright plates (306); The transfer plate (307) is fixedly installed on the top of the two upright plates (306); A floating plate (308) is disposed on top of the transfer plate (307); A hydraulic cylinder (309) is fixedly installed on the top of a floating plate (308), and the upper part of the outer wall of the output rod of the hydraulic cylinder (309) is provided with threads; A thrust unit (400) is fixedly installed at one end of the top of the cabinet (100) and is used to adjust the test angle of the test unit (300). The thrust unit (400) includes: Two hinged brackets (401) are symmetrically fixed at one end of the top of the cabinet (100) along the central axis of the cabinet (100); The cylinder (402) is hinged between two hinge seats (401); Two connecting blocks (403) are symmetrically fixedly installed on one end of the adjusting plate (303) near the cylinder (402) with respect to the central axis of the adjusting plate (303); A shaft pin (404) is fixedly installed between two connecting blocks (403), and the output rod end of the cylinder (402) is hinged to the outer wall of the shaft pin (404) through a spherical bearing; The locking unit (500) is fixedly installed inside the test unit (300) and is used for angular positioning of the test unit (300).

2. The high load-bearing capacity pallet load-bearing capacity testing device according to claim 1, characterized in that: The locking unit (500) includes: A linear bearing (501) is fixedly installed inside the transfer plate (307) and near the four corners of the transfer plate (307). The linear bearing (501) penetrates the top and bottom of the transfer plate (307). The telescopic rod (502) is slidably installed inside the linear bearing (501), and its top is fixedly connected to the bottom of the floating plate (308) by bolts; Sheet metal brackets (503) are symmetrically distributed around the two upright plates (306) and fixedly installed on the lower part of the outer wall of the two telescopic rods (502) at the corresponding positions; The arc-shaped internal rack (504) is fixedly installed on the bottom inner side of the sheet metal bracket (503); An arc-shaped external rack (505) is fixedly installed on the inner walls of the two sides of the fixed base (301) and located at the top of the opening of the arc groove (302). The arc-shaped external rack (505) is located at the top of the arc-shaped internal rack (504) and its specifications are compatible with the arc-shaped internal rack (504). The center of the arc-shaped external rack (505) is concentric with the center of the arc groove (302).

3. The high load-bearing capacity pallet load-bearing capacity testing device according to claim 2, characterized in that: The locking unit (500) further includes: Spring (506) is fixedly installed between the top of sheet metal bracket (503) and the bottom of transfer plate (307); The straightening rod (507) is fixedly installed on the top of the sheet metal bracket (503) and located inside the spring (506). The straightening rod (507) movably passes through the bottom and top of the transfer plate (307) and is slidably connected to the inner wall of the through hole of the transfer plate (307).

4. The high load-bearing capacity pallet load-bearing capacity testing device according to claim 3, characterized in that: The test unit (300) also includes: The limiting hook (3012) is symmetrically fixed at both ends of the top of the floating plate (308) along the central axis of the floating plate (308) and extends to the bottom of the transfer plate (307). The limiting hook (3012) is located between the two upright plates (306). The distance between the bottom inner side of the limiting hook (3012) and the bottom of the transfer plate (307) is adapted to the distance between the arc-shaped inner rack (504) and the arc-shaped outer rack (505).

5. The high load-bearing capacity pallet load-bearing capacity testing device according to claim 4, characterized in that: The center of the arc groove (302) is concentric with the top center of the waist groove (203).

6. The high load-bearing capacity pallet load-bearing capacity testing device according to claim 5, characterized in that: The test unit (300) also includes: A metal washer (3010) is fitted around the hydraulic cylinder (309), and the metal washer (3010) is made of high manganese steel; The locking nut (3011) is sleeved around the output rod of the hydraulic cylinder (309) and connected to the threaded connection on the outer wall of the hydraulic cylinder (309). The bottom of the locking nut (3011) is in contact with the top of the metal washer (3010).

7. The high load-bearing capacity pallet load-bearing capacity testing device according to claim 6, characterized in that: The gap between the groove wall of the waist groove (203) and the outer wall of the output rod of the hydraulic cylinder (309) is 1.5 to 2 mm.

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