Pallet compression testing machine
By designing a pallet compression tester with a double-screw four-column structure, combining motors and sensors, the problems of high prices and narrow application range of existing equipment are solved, and efficient and accurate pallet compression test is achieved, suitable for multi-spec pallets testing requirements.
Patent Information
- Application Number
- CN202421264942.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-06-04
AI Technical Summary
The existing pallet pressure testing device is expensive and has limited structural structure, making it difficult to meet the testing needs of pallets of different specifications, and has a narrow scope of application and cannot meet the needs of most manufacturers.
A pallet compression test machine is designed, using a mechanical structure of two lead screws and four guide columns, combined with a motor, reducer, pressure sensor and displacement sensor to achieve a test function with high stability, high measurement accuracy and wide application range.
It realizes efficient and precise compression testing of pallets of different specifications, reduces equipment costs, expands the scope of application, and is suitable for mass production in factories.
Smart Images
Figure CN222353657U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of detection tooling, in particular to a pallet compression testing machine. Background Art
[0002] At present, in the production process of various pallets, the load-bearing capacity of pallets is an important technical indicator of the quality and performance of pallets in most domestic pallet manufacturers. It is necessary to carry out pressure testing on each batch of finished pallets to ensure that the product quality of each batch of finished pallets can meet the use standards. Therefore, each company that produces pallets needs to be equipped with pallet pressure testing equipment. However, the relevant testing equipment on the market is relatively expensive and difficult to be accepted by most manufacturers. In addition, due to the limitation of equipment structure, it is difficult to meet the testing requirements of pallets of different specifications, and the scope of application is narrow. Summary of the invention
[0003] The utility model aims at the deficiencies of the prior art and provides a pallet compression tester. The tester adopts a mechanical structure of double screws and four guide columns, and has the characteristics of high parallelism, good stability, high measurement accuracy, high-speed return and the like.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:
[0005] A pallet compression tester, comprising a tester body, an upper pressing plate and a lower pressing plate being arranged on the upper and lower parts of the tester body, a moving device being arranged on both sides of the upper pressing plate, and a plurality of pressure sensors being arranged under the lower pressing plate;
[0006] Preferably, the moving device comprises a movable beam, a ball screw and a guide column, the upper pressure plate is arranged at the bottom of the movable beam, a nut is arranged on the ball screw, and the ball screw is arranged on both sides of the movable beam through the nut; there are no less than two guide columns, which are arranged correspondingly around the ball screw, a sliding sleeve is arranged on the guide column, and the guide column is arranged on the movable beam through the sliding sleeve;
[0007] A motor and a reducer are arranged at the bottom of the testing machine body, and the motor and the reducer are connected to the ball screw through a driving sprocket, a chain and a driven sprocket.
[0008] Preferably, the pressure sensors are evenly arranged at the four corners of the bottom of the lower pressure plate.
[0009] Preferably, a support column is provided at the bottom of the pressure sensor.
[0010] Preferably, a steel ball is provided on the top of the pressure sensor, which is helpful for adjusting the horizontal balance of the pressure plate.
[0011] Preferably, pressure plate support arms are provided on the other two sides of the movable beam.
[0012] Preferably, an operation panel is provided on the front side of the testing machine body, and the operation panel is provided with a processor, a display screen, an emergency stop button, a power indicator light, a power switch, a connecting serial port and a WIFI module.
[0013] Preferably, the ball screw is fixed on the testing machine body frame through a bearing seat, a bearing is arranged inside the bearing seat and connected to the ball screw, and plane bearings are arranged on the upper and lower sides of the bearing seat and connected to the ball screw.
[0014] Preferably, shaft pins are respectively arranged on both sides of the bottom of the lower pressing plate, and the shaft pins are inserted into a frame on which the testing machine body is arranged.
[0015] Preferably, the motor is a servo motor.
[0016] Preferably, the testing machine also includes an external displacement sensor.
[0017] The pallet compression tester provided by the utility model has a simple structure and is suitable for measuring various compression tests of pallets. It has a wide range of applications. The mechanical structure of double screws and four guide columns increases the stability of the upper pressure plate during testing and is simple to prepare, so it is suitable for factory batch production. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is the front view of the pallet compression testing machine.
[0019] Figure 2 This is a side view of the pallet compression testing machine.
[0020] Figure 3 Schematic diagram of the bending test principle.
[0021] Figure markings: 1-testing machine body, 2-lower pressure plate, 3-upper pressure plate, 4-movable beam, 41-ball screw, 42-guide column, 43-nut, 44-sliding sleeve, 5-pressure plate support arm, 6-pressure sensor, 61-support column, 62-steel ball, 7-motor and reducer, 8-chain, 9-driving sprocket, 10-driven sprocket, 11-bearing seat, 12-bearing, 13-plane bearing, 14-axle pin, 15-operating panel, 21-load, 22-loading plate, 23-safety stopper, 24-loading lever, 25-support, 26-wing, y-deflection value, L1: (L2) -internal distance between the two supports in the length (width) direction of the pallet. DETAILED DESCRIPTION
[0022] The following is a clear and complete description of the technical solutions in the embodiments of the utility model in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.
[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0024] like Figure 1 , 2 A pallet compression tester is shown, the tester comprises a tester body 1, an upper pressing plate 3 and a lower pressing plate 2 are arranged on the upper and lower sides of the tester body 1, and a moving device ( Figure 1 Only one mobile device is shown in the ).
[0025] The moving device includes a movable beam 4, a ball screw 41 and a guide column 42. The upper pressure plate 3 is arranged at the bottom of the movable beam 4; a nut 43 is arranged on the ball screw 41, and the ball screw 41 is arranged on both sides of the movable beam 4 through the nut 43, and a pressure plate support arm 5 is arranged on the other two sides of the movable beam 4; there are no less than two guide columns 42, which are arranged correspondingly around the ball screw 41, and a sliding sleeve 44 is arranged on the guide column 42, and the guide column 42 is arranged on the movable beam 4 through the sliding sleeve 44.
[0026] The bottom of the testing machine body 1 is provided with a motor and a reducer 7, which are connected to the ball screw 41 through a driving sprocket 9, a chain 8 and a driven sprocket 10, and the motor and the reducer 7 provide power for the ball screw 41. The motor adopts a servo motor, which has the characteristics of using subdivision technology, precise positioning and fast speed response.
[0027] A plurality of pressure sensors 6 are arranged below the lower pressing plate 2, and the pressure sensors 6 are evenly arranged at the four corners of the lower pressing plate 2. A support column 61 is arranged at the bottom of the pressure sensor 6, and a steel ball 62 is arranged at the top. Axle pins 14 are arranged on both sides of the bottom of the lower pressing plate 2, and the axle pins 14 are inserted into the frame of the testing machine body 1.
[0028] like Figure 1As shown, the ball screw 41 is fixed on the frame of the testing machine body 1 through the bearing seat 11, a bearing 12 is arranged inside the bearing seat 11 and connected to the ball screw 41, and plane bearings 13 are respectively arranged on the upper and lower sides of the bearing seat 11 and connected to the ball screw 41.
[0029] An operation panel 15 is provided on the front side of the testing machine body, and a processor, a display screen, an emergency stop button, a power indicator light, a power switch, an RS232 serial port and a WIFI module are provided on the operation panel 15. After being connected to the Internet, the test results can be saved to the cloud server, and data query, management, reporting, big data analysis statistics and visual large-screen display can be performed through the dedicated PN-QMS series quality management system. The RS232 serial port can communicate with the instrument, and has the functions of controlling the test and stop of the instrument, the up and down movement of the pressure plate, the setting of the specimen parameters and the report query. During the test process, the force value, deformation curve and the deformation of the real-time displacement sensor are displayed in real time, and the main interface can simultaneously display the curve, result list and bar chart of the test data. The test data is automatically saved to the database.
[0030] The testing machine of the utility model also includes an external displacement sensor for testing the deformation of the pallet. A plurality of external displacement sensors can be provided according to the shape and size of the pallet.
[0031] The main functions of this utility model testing machine are as follows:
[0032] 1. Plastic pallet test
[0033] Stacking test, bending strength test, lower deck strength test, and uniform load strength test (airbags are required);
[0034] 2 Intermodal Universal Flat Pallet Test
[0035] Stacking test, bending test, wing pallet test, bottom decking test;
[0036] 4. ISO8611 Pallets for transporting goods
[0037] Bending test, fork lifting test, pad or longitudinal beam compression test, stacking test, bottom deck bending test, wing pallet bending test, airbag bending test
[0038] 5. Can measure 4 displacements simultaneously
[0039] Four external displacement measurement sensors can measure the displacement changes of four points simultaneously.
[0040] The following is an introduction to one function of the utility model using a bending test. Figure 3 As shown, the purpose of the tests is to determine the flexural strength (test 1a) and flexural stiffness (test 1b) of the pallet under rack access conditions.
[0041] 1. Use one pallet to test in its length direction and measure its deflection value. Use another pallet to test in its width direction and measure its deflection value. The direction with the larger deflection value is the direction with the lower support stiffness of the pallet. Unless the difference between the deflection values in the above two directions is less than 15% of the larger of the two deflection values, the next step of the test only needs to be carried out in the direction with the lower support stiffness of the pallet.
[0042] 2. Replace a new pallet with the top board facing upward and across the support. The support is supported in the direction of low rigidity of the pallet, and the inner side of the support is 75mm away from the outer edge of the pallet. The center of the loading rod is 0.18L1 or 0.18L2 away from the inner side of the support. L1 (L2) is the inner distance between the two supports in the length (width) direction of the pallet.
[0043] 3. The loading rod and support should be flush with the outer edge of the pallet or extend beyond the outer edge of the pallet. The outer edge of the pallet should be processed with a radius of 2mm±1mm. If the loading rod is located at the gap of the pallet deck, a deck with the same thickness as the deck should be inserted at the corresponding gap position, and the spacing between the decks is 3mm~6mm. Place the loading rod and loading board on the pallet deck, and then apply the remaining test load.
[0044] 4. Bending strength 1a:
[0045] Load on the loading plate until a component of the pallet breaks or produces excessive deformation or deflection, and record the ultimate load value U as the bending strength of the pallet under shelf access conditions.
[0046] 5. Flexural rigidity 1b:
[0047] Take (1.5±0.5)% of the limit load value determined in test 1a as the reference load, determine the full load in accordance with Table 1 of GB / T 4995-2014, generally take 50% of the limit load U as the full load, and record the y value (the standard stipulates that 2 edges and 1 middle point should be taken). The y value is recorded at the following times: a) when the reference load is added; b) when the full load is added; c) when the full load ends; d) when the unloading ends.
[0048] The above is a description of the embodiments of the utility model. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field. The general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown in this article, but will conform to the widest range consistent with the principles and novelties disclosed in this article.
Claims
1. A pallet compression testing machine, characterized in that: The testing machine comprises a testing machine body (1), an upper pressing plate (3) and a lower pressing plate (2) are arranged on the upper and lower parts of the testing machine body (1) respectively, moving devices are arranged on both sides of the upper pressing plate (3), and a plurality of pressure sensors (6) are arranged below the lower pressing plate (2); The moving device comprises a movable beam (4), a ball screw (41) and a guide column (42); the upper pressure plate (3) is arranged at the bottom of the movable beam (4); a nut (43) is arranged on the ball screw (41); the ball screw (41) is arranged on both sides of the movable beam (4) through the nut (43); there are no less than two guide columns (42), which are arranged correspondingly around the ball screw (41); a sliding sleeve (44) is arranged on the guide column (42); the guide column (42) is arranged on the movable beam (4) through the sliding sleeve (44); A motor and a reducer (7) are arranged at the bottom of the testing machine body (1), and the motor and the reducer (7) are connected to the ball screw (41) through a driving sprocket (9), a chain (8) and a driven sprocket (10).
2. The testing machine according to claim 1, characterized in that: The pressure sensors (6) are evenly arranged at the four corners of the bottom of the lower pressing plate (2).
3. The testing machine according to claim 2, characterized in that: A support column (61) is provided at the bottom of the pressure sensor (6).
4. The testing machine according to claim 2, characterized in that: A steel ball (62) is arranged on the top of the pressure sensor (6).
5. The testing machine according to claim 1, characterized in that: Pressure plate support arms (5) are provided on the other two sides of the movable beam (4).
6. The testing machine according to claim 1, characterized in that: The ball screw (41) is fixedly mounted on the frame of the testing machine body (1) via a bearing seat (11); a bearing (12) is arranged inside the bearing seat (11) and connected to the ball screw (41); and plane bearings (13) are respectively arranged on the upper and lower sides of the bearing seat (11) and connected to the ball screw (41).
7. The testing machine according to claim 1, characterized in that: Axle pins (14) are respectively arranged on both sides of the bottom of the lower pressing plate (2), and the axle pins (14) are inserted into a frame on which the testing machine body (1) is arranged.
8. The testing machine according to claim 1, characterized in that: The motor is a servo motor.
9. The testing machine according to claim 1, characterized in that: The testing machine also includes an external displacement sensor.
10. The testing machine according to claim 1, characterized in that: An operation panel is arranged on the front side of the testing machine body (1), and a processor, a display screen, an emergency stop button, a power indicator light, a power switch, a serial port and a WIFI module are arranged on the operation panel.