High-bearing-capacity tray bearing capacity testing equipment

Abstract

The invention relates to the technical field of supporting component testing, in particular to 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 at the top of the cabinet and used for supporting a tray, and the testing unit is fixedly arranged at the top of the cabinet and used for locking the testing unit. And the support unit is located inside the support unit. After the positive pressure bearing capacity of the tray is tested, the thrust unit pushes the carrier plate of the testing unit to move along the path track of the arc groove, so that the adjusting carrier plate turns over in the moving process, and the adjusting carrier plate turns over to drive the hydraulic oil cylinder to turn over together through the connection effect of the vertical plate, the transfer plate and the floating plate; the original vertical state between the axis of the output rod of the hydraulic oil cylinder and the bottom combination surface of the tray is changed into an inclined state, a bias bearing test can be provided for the tray, and a test result more comprehensively reflects the bearing capacity of the tray.

Description

Technical Field

[0001] The invention relates to the technical field of supporting component testing, and in particular to a high-load-bearing-capacity pallet load-bearing capacity testing device. Background Art

[0002] As the coal mining working surface extends deeper, the geological conditions in the mine become more complex and harsh, which puts higher requirements on support tools. Some anchor rods and pallet systems with poor quality are prone to problems such as rod breakage and pallet failure in this environment, which seriously threatens the safe production of the working surface. Therefore, in the production of pallets, it is necessary to test the bearing capacity of the pallets to ensure that products that meet the standards are put into use;

[0003] With reference to a Chinese patent with application number 202411413843.4, a strength detection device and detection method for an octagonal gasket are disclosed, which realizes double-sided multi-point detection of the gasket, which can more comprehensively reflect the hardness of the gasket and avoid affecting the detection accuracy of the gasket hardness. After using the above-mentioned device to test the bearing capacity of the pallet, it is found that during the actual installation of the pallet, due to various assembly errors, the actual force direction of the anchor rod on the pallet is not completely perpendicular to the joint surface of the pallet. Therefore, the bearing capacity test of the pallet cannot be limited to the force test when the anchor rod is vertical to the pallet. It needs to be combined with actual use, and the bias bearing capacity of the pallet must also be tested. For this reason, we propose a high-load-bearing-capacity pallet bearing capacity test equipment to solve the above-mentioned technical problems. Summary of the invention

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

[0005] Cabinets;

[0006] A support unit, fixedly arranged on the top of the cabinet, for supporting the tray;

[0007] A test unit, fixedly arranged on the top of the cabinet and located inside the support unit, and used for testing the bearing capacity of the pallet;

[0008] The thrust unit is fixedly arranged 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 arranged inside the test unit and is used for angular positioning of the test unit.

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

[0011] The metal support plate is fixedly installed on the top of the cabinet symmetrically with the central axis of the cabinet;

[0012] A metal top plate, fixedly mounted on the top of two metal support plates;

[0013] The waist groove is opened through the top middle position of the metal top plate.

[0014] As a preferred solution of the present invention, the testing unit comprises:

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

[0016] The arc groove is formed on two sides of the fixing base close to the two metal support plates;

[0017] The adjusting carrier plate is movably arranged inside the fixing seat and located between the two arc grooves;

[0018] The wheel axles are fixedly mounted on the two ends of the bottom of the adjustment carrier plate through fixed angle brackets and are arranged parallel to each other, and the wheel axles extend to the inside of the two arc grooves;

[0019] The groove wheel is rotatably mounted on both ends of the outer walls of the two wheel shafts through bearings, the specifications of the groove wheel are adapted to the specifications of the arc groove, and the outer wall of the groove wheel is rollingly connected with the inner wall of the arc groove;

[0020] A vertical plate is symmetrically fixed on the top of the fixing seat with the central axis of the fixing seat, and the number of the vertical plates is two;

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

[0022] A floating plate, arranged on top of the transfer plate;

[0023] The hydraulic oil 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 oil cylinder is provided with threaded threads.

[0024] As a preferred solution of the present invention, the thrust unit comprises:

[0025] The hinged seats are fixedly mounted at one end of the top of the cabinet symmetrically with the central axis of the cabinet, and there are two of them;

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

[0027] The connecting blocks are symmetrically fixedly installed on one end of the adjusting carrier plate close to the cylinder with the central axis of the adjusting carrier plate, and there are two of them;

[0028] The shaft pin is fixedly installed between the two connecting blocks, and the end of the output rod of the cylinder is hinged to the outer wall of the shaft pin through a joint bearing.

[0029] As a preferred solution 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 runs through the top and the bottom of the transfer plate;

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

[0032] The sheet metal brackets are symmetrically distributed around the peripheries of the two vertical plates and fixedly mounted on the lower parts of the outer walls of the two telescopic rods at corresponding positions;

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

[0034] The arc-shaped outer rack is fixedly mounted on the inner walls on both sides of the fixing seat and is located at the opening top of the arc groove. The arc-shaped outer rack is located at the top of the arc-shaped inner rack and its specifications are adapted to the arc-shaped inner rack. The center of the arc-shaped outer rack is concentric with the center of the arc groove.

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

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

[0037] The straightening rod is fixedly mounted on the top of the sheet metal bracket and is located inside the spring. The straightening rod movably penetrates the bottom and top of the transfer plate and is slidably connected to the inner wall of the through hole of the transfer plate.

[0038] As a preferred solution of the present invention, the testing unit further includes:

[0039] The limit hook is symmetrically fixed on the top two ends of the floating plate with the central axis of the floating plate, and extends to the bottom of the transfer plate. The limit hook is located between the two vertical plates, and the distance between the inner side surface of the bottom of the limit hook and the bottom of the transfer plate is adapted to the distance between the arc-shaped inner rack and the arc-shaped outer rack.

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

[0041] As a preferred solution of the present invention, the testing unit further includes:

[0042] A metal washer is sleeved on the periphery of the hydraulic cylinder, and the metal washer is made of high manganese steel;

[0043] The locking nut is sleeved on the periphery of the hydraulic cylinder output rod and is connected with the threaded connection provided on the outer wall of the hydraulic cylinder. The bottom of the locking nut is fitted with the top of the metal washer.

[0044] As a preferred solution 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 1.5-2 mm.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. In the present invention, after the positive pressure bearing capacity test of the pallet is completed, the carrier plate of the test unit is pushed by the thrust unit to move along the path trajectory of the arc groove, causing the adjustment carrier plate to flip during the movement. The adjustment carrier plate flips and drives the hydraulic cylinder to flip together through the connection of the vertical 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 an inclined state, which can provide a biased bearing test for the pallet, and the test results more comprehensively reflect the bearing capacity of the pallet.

[0047] 2. In the present invention, after the bottom of the metal gasket is driven downward by the output rod of the hydraulic cylinder to collide with 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 moved upward by the reverse pulling force and drives the floating plate to move upward, so that the inner walls of the four linear bearings slide upward, and further drive the two sheet metal brackets to move upward together, so that the arc-shaped inner rack and the arc-shaped outer rack are engaged with each other, so as to position the floating plate, the transfer plate, the vertical plate and the adjustment carrier plate, etc., and there is no need for the output rod of the cylinder to provide the adjusted positioning for the adjustment carrier plate, the cylinder will not be in a high-load state, and the service life of the cylinder can be guaranteed as much as possible, thereby improving the test life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0049] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0050] Figure 3 It is a structural schematic diagram of the support unit in the present invention;

[0051] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of part A;

[0052] Figure 5 It is a schematic diagram of the cross-sectional structure of the fixing seat in the present invention;

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

[0054] Figure 7 For the present invention Figure 6 Schematic diagram of the three-dimensional structure;

[0055] Figure 8 It is a schematic diagram of the local structure of the test unit in the present invention;

[0056] Fig. 9 It is a structural schematic diagram of the locking unit in the present invention;

[0057] Fig.10 For the present invention Figure 7 Schematic diagram of the plane structure;

[0058] Fig.11 For the present invention Figure 3 Schematic diagram of the enlarged structure of part B.

[0059] In the figure: 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, adjustment carrier plate; 304, axle; 305, groove wheel; 306, vertical plate; 307, transfer plate; 308, floating plate; 309, hydraulic cylinder; 3010, metal washer; 3011, locking nut; 3012, limit hook; 400, thrust unit; 401, hinged 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 inner rack; 505, arc-shaped outer rack; 506, spring; 507, straightening rod. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] See also Figures 1 to 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 test unit 300, a thrust unit 400 and a locking unit 500. The support unit 200 is fixedly arranged on the top of the cabinet 100 and is used to support the pallet. The test unit 300 is fixedly arranged on the top of the cabinet 100 and is located inside the support unit 200. The test unit 300 is used for testing the load-bearing capacity of the pallet. The thrust unit 400 is fixedly arranged at one end of the top of the cabinet 100 and is used to adjust the test angle of the test unit 300. The locking unit 500 is fixedly arranged inside the test unit 300 and is used for angular positioning of the test unit 300.

[0063] For further details, please refer to Figure 2 as well as Fig.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 fixedly installed on the top of the cabinet 100 symmetrically with 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 runs through the middle position of the top of the metal top plate 202.

[0065] Specifically, the metal top plate 202 is fixed to the top of the cabinet 100 by setting two metal support plates 201. Before testing, the tray to be tested can be placed on the 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 Figures 4 to 11 As shown:

[0067] The test unit 300 includes a fixed seat 301, an arc groove 302, an adjustment carrier plate 303, an axle 304, a groove 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 seat 301 is fixedly installed on the top of the cabinet 100 and is located between the two metal support plates 201. The arc groove 302 runs through the two side surfaces of the fixed seat 301 close to the two metal support plates 201. The center of the arc groove 302 is concentric with the top center of the waist groove 203. The adjusting carrier plate 303 is movably arranged inside the fixing seat 301 and is located between the two arc grooves 302. The wheel shafts 304 are fixedly installed at the two ends of the bottom of the adjusting carrier plate 303 through the fixed angle code and are arranged parallel to each other. The wheel shafts 304 extend into the two arc grooves 302. The groove wheels 305 are rotatably installed at the two ends of the outer walls of the two wheel shafts 304 through bearings. The specifications of the groove wheels 305 are adapted to the specifications of the arc grooves 302, and the outer wall of the groove wheels 305 is rollingly connected to the inner wall of the arc grooves 302. The vertical plate 306 is symmetrically fixed to the fixing seat 301 with the central axis. The top of the seat 301, the number of vertical plates 306 is two, the transfer plate 307 is fixedly installed on the top of the two vertical plates 306, the floating plate 308 is arranged on the top of the transfer plate 307, the hydraulic cylinder 309 is fixedly installed on the top of the floating plate 308, the upper part of the outer wall of the output rod of the hydraulic cylinder 309 is provided with threaded teeth, 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, the metal washer 3010 is sleeved on the periphery of the hydraulic cylinder 309, the metal washer 3010 is made of high manganese steel, and the locking nut 3011 is sleeved on the hydraulic cylinder 309. The hydraulic cylinder 309 is arranged on the periphery of the output rod and is connected to the threaded connection on the outer wall of the hydraulic cylinder 309. The bottom of the locking nut 3011 fits with the top of the metal washer 3010. The limit hook 3012 is symmetrically fixed on the top two ends of the floating plate 308 with 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 surface 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 pallet to be tested is placed on the top of the metal top plate 202 and located outside the opening of the waist groove 203, and the hydraulic cylinder 309 is started to extend its output rod upward, penetrate from the bottom of the waist groove 203, and then pass through the top of the center hole of the pallet, and then the metal washer 3010 is sleeved on the periphery of the hydraulic cylinder 309. The metal washer 3010 rests on the top of the pallet under the action of gravity, and then the locking nut 3011 is screwed on the periphery of the hydraulic cylinder 309 through threads, and a small gap is reserved between the bottom of the locking nut 3011 and the top of the hydraulic cylinder 309, and then the external computer is used to control the test. 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, further driving 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 fit together. A downward squeezing force is applied to the metal washer 3010, and further a downward squeezing force is applied to the top of the pallet through the metal washer 3010, thereby providing a positive pressure bearing test for the pallet. By observing whether the pallet has deformation, tearing and other problems, it is possible to judge whether the positive pressure bearing strength of the pallet is qualified.

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

[0070] The thrust unit 400 includes an articulated seat 401, a cylinder 402, a connecting block 403 and an axle pin 404. The articulated seat 401 is symmetrically fixedly installed on the top end of the cabinet 100 with the central axis of the cabinet 100, and there are two of them. The cylinder 402 is hinged between the two articulated seats 401. The connecting block 403 is symmetrically fixedly installed on the end of the adjusting carrier plate 303 close to the cylinder 402 with the central axis of the adjusting carrier plate 303, and there are two of them. The axle 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 axle pin 404 through a joint bearing.

[0071] Specifically, the output rod of the cylinder 402 extends outward, and further pushes the adjustment carrier plate 303 to move away from the cylinder 402 under the connection action of the connecting block 403 and the shaft pin 404. During the movement of the adjustment carrier plate 303, the wheel shaft 304 and the groove wheel 305 are driven to move together, and the groove wheel 305 is affected by the path matching relationship with the arc groove 302, so that the adjustment carrier plate 303 moves along the path trajectory of the arc groove 302, causing the adjustment carrier plate 303 to flip during the movement. The flipping of the adjustment carrier plate 303 drives the hydraulic cylinder 309 to flip together through the connection action of the vertical plate 306, the transfer plate 307 and the floating plate 308. At this time, the output rod axis of the hydraulic cylinder 309 and the bottom joint surface of the tray are connected by The original vertical state is changed to an inclined state. Subsequently, the working parameters of the hydraulic cylinder 309 are set through an external computer, so that the output rod of the hydraulic cylinder 309 moves downward according to the test torque, further driving 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 fit together. A downward extrusion force is applied to the metal washer 3010, and further, an extrusion force along the axial direction of the output rod of the hydraulic cylinder 309 is applied to the top of the pallet through the metal washer 3010, thereby providing a bias load test for the pallet. By observing whether the pallet has deformation, tearing, and other problems, it is possible to judge whether the bias load strength of the pallet is qualified.

[0072] For further details, please refer to Figures 5 to 9 As shown:

[0073] The locking unit 500 includes a linear bearing 501, a telescopic rod 502, a sheet metal bracket 503, an arcuate inner rack 504 and an arcuate outer rack 505. The linear bearing 501 is fixedly installed inside the transfer plate 307 and close to the four corners of the transfer plate 307. The linear bearing 501 passes through the top and the bottom of the transfer plate 307. The telescopic rod 502 is slidably installed inside the linear bearing 501, and the top is fixedly connected to the bottom of the floating plate 308 by bolts. The sheet metal bracket 503 is symmetrically distributed. On the periphery of the two vertical plates 306, and fixedly installed on the lower outer wall of the two telescopic rods 502 at the corresponding positions, the arc-shaped inner rack 504 is fixedly installed on the inner side of the bottom of the sheet metal bracket 503, and the arc-shaped outer rack 505 is fixedly installed on the inner walls on both sides close to the fixed seat 301, and is located at the opening top of the arc groove 302. The arc-shaped outer rack 505 is located at the top of the arc-shaped inner rack 504, and the specifications are adapted to the arc-shaped inner rack 504, and 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 drives the bottom of the metal washer 3010 downward to contact the top of the pallet, as the output rod of the hydraulic cylinder 309 continues to move downward, the cylinder body of the hydraulic cylinder 309 is subjected to the reverse pulling force and moves upward, further driving the floating plate 308 to move upward. The upward movement of the floating plate 308 also drives the two limit hooks 3012 to move together, until the bottom inner side surfaces of the two limit hooks 3012 hook the bottom surface of the transfer plate 307, thereby limiting the upward movement distance of the floating plate 308, so that the floating plate 308 will not move upward infinitely. At the same time, the upward movement of the floating plate 308 also drives the four telescopic rods 502 to slide upward along the inner walls of the four linear bearings 501, and the four telescopic rods 502 slide upward and drive the two sheet metal brackets 503 Move upward together, the sheet metal bracket 503 moves upward to drive the arc-shaped inner rack 504 to move upward, so that the arc-shaped inner rack 504 is engaged with the arc-shaped outer rack 505. It should be noted that when the bottom inner side surface of the limit hook 3012 contacts the bottom surface of the transfer plate 307, the arc-shaped inner rack 504 just engages with the arc-shaped outer rack 505. Due to the engagement of the arc-shaped inner rack 504 and the arc-shaped outer rack 505, the floating plate 308, the transfer plate 307, the vertical plate 306 and the adjustment carrier plate 303 are positioned. In other words, during the test, there is no need for the output rod of the cylinder 402 to provide the adjusted positioning effect on the adjustment carrier plate 303. Therefore, the cylinder 402 will not be in a high-load state, thereby ensuring the service life of the cylinder 402 as much as possible and improving the testing life of the equipment.

[0075] For further details, please refer to Fig. 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 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.

[0077] Specifically, during the upward movement of the sheet metal bracket 503, the straightening rod 507 is also driven to move together. 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 the upward movement, thereby ensuring the smooth movement of the straightening rod 507. At the same time, due to the upward movement of the sheet metal bracket 503, the spring 506 is compressed and accumulated, so that after the test is completed, the output rod of the hydraulic cylinder 309 is reset upward, and the upward pulling force on the floating plate 308 disappears, so 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 reset downward, causing the arc-shaped inner rack 504 and the arc-shaped outer rack 505 to disengage, making it convenient for the thrust unit 400 to drive the test unit 300 to reset, so as to facilitate the subsequent positive pressure load test of the pallet.

[0078] The high-load-bearing capacity pallet load-bearing capacity testing device of this scheme includes the following processes when working:

[0079] Before the test: place the pallet to be tested on the top of the metal top plate 202 and outside the opening of the waist groove 203, start the hydraulic cylinder 309, extend its output rod upward, penetrate from the bottom of the waist groove 203, and then pass through the top of the center hole of the pallet, then put the metal washer 3010 on the periphery of the hydraulic cylinder 309, and the metal washer 3010 rests on the top of the pallet under the action of gravity, then screw the locking nut 3011 on the periphery of the hydraulic cylinder 309 through threads, and ensure that a small gap is reserved between the bottom of the locking nut 3011 and the top of the hydraulic cylinder 309.

[0080] During the test: including positive pressure load test on the pallet and bias load test on the pallet:

[0081] First, the positive pressure bearing test of the pallet is carried out: the working parameters of the hydraulic cylinder 309 are set through an external computer, so that the output rod of the hydraulic cylinder 309 moves downward according to the test torque, and 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 fit together. Then, a downward squeezing force is applied to the metal washer 3010, and further a downward squeezing force is applied to the top of the pallet through the metal washer 3010, thereby providing a positive pressure bearing test for the pallet. By observing whether the pallet has deformation, tearing, and other problems, it is judged whether the positive pressure bearing strength of the pallet is qualified;

[0082] Biased load test of the pallet: start the cylinder 402 to extend its output rod outward, and further push the adjustment carrier 303 to move away from the cylinder 402 under the connection of the connecting block 403 and the shaft pin 404. During the movement of the adjustment carrier 303, the wheel shaft 304 and the groove wheel 305 are driven to move together, and the groove wheel 305 is affected by the path matching relationship with the arc groove 302, so that the adjustment carrier 303 moves along the path trajectory of the arc groove 302, causing the adjustment carrier 303 to flip during the movement. The flipping of the adjustment carrier 303 drives the hydraulic cylinder 309 to flip together through the connection of the vertical plate 306, the transfer plate 307 and the floating plate 308. At this time, the axis of the output rod of the hydraulic cylinder 309 is connected to the bottom of the pallet. The joint surfaces change from the original vertical state to an inclined state, and then the working parameters of the hydraulic cylinder 309 are set through an external computer, so that the output rod of the hydraulic cylinder 309 moves downward according to the test torque, further driving 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 fit together. A downward extrusion force is applied to the metal washer 3010, and further, an extrusion force along the axial direction of the output rod of the hydraulic cylinder 309 is applied to the top of the pallet through the metal washer 3010, thereby providing a bias load test for the pallet, and judging whether the positive pressure bearing strength of the pallet is qualified by observing whether the pallet has problems such as deformation and tearing.

[0083] During the test, the device also provides a locking unit 500 to protect the cylinder 402 to prevent the cylinder 402 from being damaged due to a high load. Specifically:

[0084] When the output rod of the hydraulic cylinder 309 drives the bottom of the metal washer 3010 downward to contact the top of the pallet, as the output rod of the hydraulic cylinder 309 continues to move downward, the cylinder body of the hydraulic cylinder 309 is subjected to the reverse pulling force and moves upward, further driving the floating plate 308 to move upward. The upward movement of the floating plate 308 also drives the two limit hooks 3012 to move together until the bottom inner side surfaces of the two limit hooks 3012 hook the bottom surface of the transfer plate 307, thereby limiting the upward movement distance of the floating plate 308, so that the floating plate 308 will not move upward infinitely. At the same time, the upward movement of the floating plate 308 also drives 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 drives the two sheet metal brackets 503 upward Moving together, the sheet metal bracket 503 moves upward, driving the arc-shaped inner rack 504 to move upward, so that the arc-shaped inner rack 504 is engaged with the arc-shaped outer rack 505. It should be noted that when the bottom inner side surface of the limit hook 3012 contacts the bottom surface of the transfer plate 307, the arc-shaped inner rack 504 just engages with the arc-shaped outer rack 505. Due to the engagement of the arc-shaped inner rack 504 and the arc-shaped outer rack 505, the floating plate 308, the transfer plate 307, the vertical plate 306 and the adjustment carrier plate 303 are positioned. In other words, during the test, there is no need for the output rod of the cylinder 402 to provide the adjusted positioning effect for the adjustment carrier plate 303. Therefore, the cylinder 402 will not be in a high-load state, thereby ensuring the service life of the cylinder 402 as much as possible and improving the testing life of the equipment.

[0085] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A high-load-bearing pallet load-bearing capacity testing device, characterized in that: include: Cabinet (100); A support unit (200) is fixedly arranged on the top of the cabinet (100) and is used to support the tray; A test unit (300) is fixedly arranged on the top of the cabinet (100) and located inside the support unit (200), wherein the test unit (300) is used for testing the bearing capacity of the tray; A thrust unit (400) is fixedly arranged at one end of the top of the cabinet (100) and is used to adjust a test angle of the test unit (300); The locking unit (500) is fixedly arranged inside the test unit (300) and is used for angular positioning of the test unit (300).

2. A high-load-bearing pallet load-bearing capacity testing device according to claim 1, characterized in that: The support unit (200) comprises: A metal support plate (201) is fixedly mounted on the top of the cabinet (100) symmetrically with respect to the central axis of the cabinet (100); A metal top plate (202) is fixedly mounted on the top of the two metal support plates (201); The waist groove (203) is formed through the middle of the top of the metal top plate (202).

3. A high-load-bearing pallet load-bearing capacity testing device according to claim 2, characterized in that: The testing unit (300) comprises: A fixing seat (301) is fixedly mounted on the top of the cabinet (100) and is located between the two metal support plates (201); The arc groove (302) is formed through two side surfaces of the fixing seat (301) close to the two metal support plates (201); An adjustment carrier plate (303) is movably arranged inside the fixing seat (301) and located between the two arc grooves (302); The wheel axles (304) are fixedly mounted on the two ends of the bottom of the adjustment carrier plate (303) through fixed angle brackets and are arranged parallel to each other. The wheel axles (304) extend to the inside of the two arc grooves (302); The groove wheel (305) is rotatably mounted on both ends of the outer walls of the two wheel shafts (304) via bearings, the specifications of the groove wheel (305) are compatible with the specifications of the arc groove (302), and the outer wall of the groove wheel (305) is rollingly connected to the inner wall of the arc groove (302); A vertical plate (306) is fixedly mounted on the top of the fixing seat (301) symmetrically with respect to the central axis of the fixing seat (301), and the number of the vertical plates (306) is two; A transfer plate (307) is fixedly mounted on the top of the two vertical plates (306); A floating plate (308) is disposed on top of the transfer plate (307); The hydraulic cylinder (309) is fixedly mounted on the top of the floating plate (308), and a thread is formed on the upper portion of the outer wall of the output rod of the hydraulic cylinder (309).

4. A high-load-bearing pallet load-bearing capacity testing device according to claim 3, characterized in that: The thrust unit (400) comprises: Two hinged seats (401) are fixedly mounted on one end of the top of the cabinet (100) symmetrically about the central axis of the cabinet (100); The cylinder (402) is hinged between the two hinge seats (401); Two connecting blocks (403) are fixedly mounted on one end of the adjusting carrier plate (303) close to the cylinder (402) symmetrically with respect to the central axis of the adjusting carrier plate (303); The shaft pin (404) is fixedly installed between the two connecting blocks (403), and the end of the output rod of the cylinder (402) is hinged to the outer wall of the shaft pin (404) through a joint bearing.

5. The high-load-bearing pallet load-bearing capacity testing device according to claim 4, characterized in that: The locking unit (500) comprises: A linear bearing (501) is fixedly mounted inside the transfer plate (307) and close to the four corners of the transfer plate (307), wherein the linear bearing (501) passes through the top and the bottom of the transfer plate (307); The telescopic rod (502) is slidably mounted inside the linear bearing (501), and the top is fixedly connected to the bottom of the floating plate (308) by bolts; The sheet metal brackets (503) are symmetrically distributed around the peripheries of the two vertical plates (306) and are fixedly mounted on the lower parts of the outer walls of the two telescopic rods (502) at corresponding positions; An arc-shaped inner rack (504) is fixedly mounted on the inner side of the bottom of the sheet metal bracket (503); The arc-shaped outer gear rack (505) is fixedly mounted on the inner walls of the fixing seat (301) on both sides thereof and is located at the top of the opening of the arc groove (302). The arc-shaped outer gear rack (505) is located at the top of the arc-shaped inner gear rack (504) and has specifications matching those of the arc-shaped inner gear rack (504). The center of the arc-shaped outer gear rack (505) is concentric with the center of the arc groove (302).

6. The high-load-bearing pallet load-bearing capacity testing device according to claim 5, characterized in that: The locking unit (500) further comprises: A spring (506) is fixedly mounted between the top of the sheet metal bracket (503) and the bottom of the transfer plate (307); The straightening rod (507) is fixedly mounted on the top of the sheet metal bracket (503) and is located inside the spring (506). The straightening rod (507) movably penetrates 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).

7. The high-load-bearing pallet load-bearing capacity testing device according to claim 6, characterized in that: The testing unit (300) further includes: The limit hook (3012) is symmetrically fixedly mounted on the top two ends of the floating plate (308) with 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 surface 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).

8. The high-load-bearing pallet load-bearing capacity testing device according to claim 7, characterized in that: The center of the arc groove (302) is concentric with the top center of the waist groove (203).

9. The high-load-bearing pallet load-bearing capacity testing device according to claim 8, characterized in that: The testing unit (300) further includes: A metal washer (3010) is sleeved on the periphery of the hydraulic cylinder (309), wherein the metal washer (3010) is made of high manganese steel; The locking nut (3011) is sleeved on the outer periphery of the output rod of the hydraulic cylinder (309) and is connected to the threaded connection provided on the outer wall of the hydraulic cylinder (309). The bottom of the locking nut (3011) fits with the top of the metal washer (3010).

10. The high-load-bearing pallet load-bearing capacity testing device according to claim 9, 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 1.5-2 mm.

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