Furniture strength and deformation testing device and testing method

Abstract

The present invention provides a furniture strength and deformation test device and test method, which comprises: a workbench for placing and fixing a sample to be tested; a support assembly fixedly connected to the workbench; a vertical pole assembly fixedly arranged on the support assembly; a load assembly sleeved on the vertical pole assembly, and moving along the vertical pole assembly after loading a load; a pulley assembly fixedly arranged on the support assembly; a rope fixedly connected to the load assembly through the pulley assembly, so that the sample to be tested is connected to the load assembly; a distance sensor arranged on the load assembly, and used to test the displacement of the load assembly; wherein, by loading the load assembly with a load, the load assembly moves along the vertical pole assembly, and applies tension to the rope, and then applies tension to the sample to be tested, and the distance sensor measures the displacement of the load assembly to obtain the strength and deformation of the sample to be tested. The present invention has the advantages of simple structure, accurate single and continuous load loading, and the ability to achieve loading at different angles.

Description

Technical Field

[0001] The invention relates to the field of testing, and in particular to a furniture strength and deformation testing device and a testing method. Background Art

[0002] Furniture is a necessity in today's society. The types of furniture are changing with the development of the times. Today's furniture is of various types and novel structures, which are an important foundation for establishing work and living space. In the process of continuous development of the industry, the use of new technologies and new structures may lead to certain instability in the strength of furniture. Therefore, performance tests are required before furniture leaves the factory, such as whether the fastener connection is stable, whether deformation occurs when subjected to external forces, etc. The existing testing equipment is relatively large in size, equipped with corresponding instruments, high in cost, complicated in operation, and can only measure at a single angle, and cannot achieve accurate loading of continuous loads and obtain key indicators such as deformation and strength performance after long-term use. Summary of the invention

[0003] The purpose of the present invention is to provide a furniture strength and deformation testing device and testing method, which has the advantages of simple structure, can realize single and continuous load accurate loading and realize force value measurement at different angles.

[0004] To achieve the above-mentioned purpose, the present invention provides a furniture strength and deformation testing device, which comprises: a workbench for placing and fixing a sample to be tested; a support assembly fixedly connected to the workbench; a vertical pole assembly fixedly arranged on the support assembly; a load assembly sleeved on the vertical pole assembly and moved along the vertical pole assembly after being loaded with a load; a pulley assembly fixedly arranged on the support assembly; a rope, one end of which is connected to the sample to be tested and the other end of which is fixedly connected to the load assembly through the pulley assembly, so that the sample to be tested is connected to the load assembly; a distance measuring sensor arranged on the load assembly and used to test the displacement of the load assembly; wherein, by loading the load assembly with a load, the load assembly is subjected to the force applied by the load and moves along the vertical pole assembly, and applies tension to the rope, thereby applying tension to the sample to be tested, and the displacement of the load assembly is measured by the distance measuring sensor to obtain the strength and deformation of the sample to be tested.

[0005] Wherein, the supporting assembly includes: a second profile, which is fixedly connected to one side of the workbench; a frame, whose structure is a frame with a half-open bottom, and the frame opening is fixedly connected to both sides of the second profile; a first profile, whose structure is a frame with a half-open bottom, arranged below the frame; wherein, the frame opening of the first profile is fixedly connected to the top surface of the second profile, the frame height of the first profile matches the frame height of the rack, and the horizontal frame of the first profile is vertically arranged with the horizontal frame of the rack.

[0006] Preferably, the center of the horizontal frame of the first profile is fixedly connected to the center of the horizontal frame of the rack; wherein, since the two vertical frames of the rack and the first profile are respectively fixedly connected to the second profile, the pulley assembly can be fixedly arranged.

[0007] Among them, the vertical pole assembly includes: two screw rods, which are symmetrically arranged on the inner side of the rack frame, and the two ends of each screw rod are fixedly connected to the horizontal frame of the rack and the second profile; two linear optical axes, which are symmetrically arranged on the inner sides of the two screw rods, and the two ends of each linear optical axis are fixedly connected to the horizontal frame of the rack and the second profile.

[0008] Among them, the load assembly includes: a load loading box, whose two ends are respectively mounted on two linear optical axes, so that the load loading box can move vertically along the linear optical axes; a linear bearing is also fixedly arranged on the load loading box for connecting with the rope; a load loading box support plate, which is arranged below the load loading box, and whose two ends are fixedly connected to the two screw rods by nuts, so that the load loading box support plate can move up and down with the rotation of the screw rods; a plurality of load impact buffer cylinders, which are evenly arranged at the bottom of the load loading box support plate, for supporting the load loading box.

[0009] Preferably, the distance measuring sensor is fixedly arranged at the center of the support plate of the load loading box and is directly opposite to the bottom center of the load loading box to ensure the accuracy of the measured displacement data.

[0010] Preferably, a motor is also provided at the extension part of the horizontal frame of the rack, and each of the lead screws is respectively connected to the motor and driven to rotate by the motor, thereby driving the load loading box support plate to move up and down.

[0011] Wherein, the pulley assembly includes: a first pulley, which is fixedly arranged on the horizontal frame of the first profile and aligned with the bottom center of the load loading box to ensure that the force applied by the load loading box to the rope passing around the first pulley is vertically downward; a second pulley, which is fixedly arranged at the connection between the horizontal frame of the first profile and the vertical frame close to the workbench; a third pulley, which is fixedly arranged on the vertical frame of the first profile close to the workbench, and its position height can be adjusted according to the height of the sample to be tested; a fourth pulley, which is fixedly arranged on the second profile and located between the workbench and the vertical frame of the first profile on which the third pulley is arranged, and its position from the workbench can be adjusted according to the loading angle required for the test; wherein, one end of the rope is fixedly connected to the linear bearing of the load loading box, and the other end is connected to the first pulley, the second pulley, the third pulley, and / or the fourth pulley in sequence, and then connected to the sample to be tested placed on the workbench.

[0012] Preferably, the furniture strength and deformation testing device further comprises a load storage box, which is used to store standard sand bags as weight loads.

[0013] A method for testing furniture strength and deformation, the measuring steps of which include:

[0014] Step S1, when no load is loaded, the load loading box is placed on the load loading box support plate, the load impact buffer cylinder supports the load loading box, and the tested sample is placed and fixed on the workbench;

[0015] Step S2, connecting one end of the rope to the linear bearing on the load loading box, and then connecting the rope to the tested sample through the pulley assembly, and adjusting the position of the pulley assembly so that the load loading angle meets the test requirements;

[0016] Step S3, the motor is powered on to rotate, driving the screw rod to rotate, driving the load loading box support plate to descend, so that the load loading box is suspended in the air;

[0017] Step S4, using the distance measuring sensor on the load loading box support plate to measure the vertical distance D1 from the load loading box to the distance measuring sensor;

[0018] Step S5, placing a load into the load loading box;

[0019] Step S6: After the load is loaded, the entire test device is kept stationary, and after a predetermined loading time is reached, the distance sensor is used to measure the vertical distance D2 from the load loading box to the distance sensor again;

[0020] Step S7: After the vertical distance D2 is measured, the test is completed to check whether the tested sample is damaged and calculate the deformation D1-D2.

[0021] In summary, compared with the prior art, the furniture strength and deformation testing device and testing method provided by the present invention have the following beneficial effects: 1. By setting multiple sets of pulleys, the loading angle of the device can be changed, thereby realizing the measurement of the strength and deformation of furniture at different angles; 2. By setting a load loading box, single and continuous loads can be accurately loaded, and long-term measurements can be performed; 3. By setting a ranging sensor, the deformation data after long-term use can be obtained, thereby evaluating the reliability of the furniture. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the furniture strength and deformation testing device of the present invention;

[0023] Figure 2 It is a structural front view of the furniture strength and deformation testing device of the present invention;

[0024] Figure 3It is a structural side view of the furniture strength and deformation testing device of the present invention; DETAILED DESCRIPTION

[0025] The following will be combined with the attached embodiment of the present invention Figure 1 ~Attached Figure 3 , the technical solutions, structural features, objectives achieved and effects in the embodiments of the present invention are described in detail.

[0026] It should be noted that the drawings are in a very simplified form and use non-precise proportions. They are only used to conveniently and clearly assist in explaining the embodiments of the present invention, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention.

[0027] It should be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only the elements explicitly listed, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] The present invention provides a furniture strength and deformation testing device, such as Figure 1 As shown, the furniture strength and deformation testing device includes: a workbench 1 for placing and fixing the tested sample; a support assembly, which is fixedly connected to the workbench 1; a vertical pole assembly is fixedly arranged on the support assembly; a load assembly, which is sleeved on the vertical pole assembly and moves along the vertical pole assembly after loading a load; a pulley assembly, which is fixedly arranged on the support assembly; a rope 9, one end of which is connected to the tested sample, and the other end is fixedly connected to the load assembly through the pulley assembly, so that the tested sample is connected to the load assembly; a distance sensor 12, which is arranged on the load assembly and is used to test the displacement of the load assembly; wherein, by loading the load assembly with a load, the load assembly is subjected to the force applied by the load and moves along the vertical pole assembly, and applies tension to the rope 9, and then applies tension to the tested sample, and the displacement of the load assembly is measured by the distance sensor 12, and then the strength and deformation of the tested sample are obtained.

[0029] Among them, Figure 1 and Figure 2As shown, the support assembly includes: a second profile A2, which is fixedly connected to one side of the workbench 1; a frame 3, whose structure is a frame with a half-open bottom, and the frame opening is fixedly connected to both sides of the second profile A2; a first profile A1, whose structure is a frame with a half-open bottom, is arranged below the frame 3; specifically, the frame opening of the first profile A1 is fixedly connected to the top surface of the second profile A2, the frame height of the first profile A1 matches the frame height of the frame 3, the horizontal frame of the first profile A1 is vertically arranged with the horizontal frame of the frame 3, and the center of the horizontal frame of the first profile A1 is fixedly connected with the center of the horizontal frame of the frame 3; since the two vertical frames of the frame 3 and the first profile A1 are respectively fixedly connected to the second profile A2, they can be used to fix the pulley assembly.

[0030] Among them, Figure 1 As shown, the vertical pole assembly includes: two screw rods 4, which are symmetrically arranged on the inner side of the frame of the frame 3, and the two ends of each screw rod 4 are respectively fixedly connected to the horizontal frame of the frame 3 and the second profile A2; two linear optical axes 5, which are respectively symmetrically arranged on the inner sides of the two screw rods 4, and the two ends of each linear optical axis 5 are respectively fixedly connected to the horizontal frame of the frame 3 and the second profile A2.

[0031] Among them, Figure 1 As shown, the load assembly includes: a load loading box 10, both ends of which are respectively mounted on two linear optical axes 5, so that the load loading box 10 can move vertically along the linear optical axes 5; a linear bearing 101 is also fixedly arranged on the load loading box 10 for connecting with the rope 9; a load loading box support plate 11, which is arranged below the load loading box 10 (there is no connection between the load loading box support plate 11 and the load loading box 10), and both ends are fixedly connected to the two screw rods 4 by nuts, so that the load loading box support plate 11 can move up and down with the rotation of the screw rod 4; a plurality of load impact buffer cylinders 13, which are evenly arranged at the bottom of the load loading box support plate 11, for supporting the load loading box 10 (in this embodiment, 4 load impact buffer cylinders are evenly arranged).

[0032] Among them, Figure 1 As shown, the distance measuring sensor 12 is fixedly arranged at the center of the load loading box support plate 11 and is directly opposite to the bottom center of the load loading box 10 to ensure the accuracy of the measured displacement data.

[0033] Among them, Figure 1 As shown, a motor 2 is also provided at the extension part of the horizontal frame of the rack 3, and each of the screw rods 4 is respectively connected to the motor 2 and driven by the motor 2 to rotate, thereby driving the load loading box support plate 11 to move up and down.

[0034] Among them, Figure 1 and Figure 2 As shown, the pulley assembly includes: a first pulley 6, which is fixedly arranged on the horizontal frame of the first profile A1 and is aligned with the bottom center of the load loading box 10, so as to ensure that the force applied by the load loading box 10 to the rope 9 passing around the first pulley 6 is vertically downward; a second pulley 7, which is fixedly arranged at the connection between the horizontal frame of the first profile A1 and the vertical frame close to the workbench 1; a third pulley 8, which is fixedly arranged on the vertical frame of the first profile A1 close to the workbench 1, that is, it is located vertically below the second pulley 7, and its position height can be adjusted according to the height of the tested sample; a fourth pulley 14, which is fixedly arranged on the second profile A2, and is located between the workbench 1 and the vertical frame of the first profile A1 provided with the third pulley 8, and its position from the workbench 1 can be adjusted according to the angle of loading required for the test. One end of the rope 9 is fixedly connected to the linear bearing 101 of the load loading box 10, and the other end is connected to the first pulley 6, the second pulley 7, the third pulley 8, and / or the fourth pulley 14 in sequence and then connected to the tested sample placed on the workbench 1.

[0035] Among them, Figure 1 As shown, the furniture strength and deformation testing device also includes a load storage box 15, which is used to store standard sand bags as load-bearing loads; the standard sand bags can be stored according to demand, such as 10 10kg sand bags, 10 5kg sand bags, 10 1kg sand bags, and 10 0.1kg sand bags.

[0036] It should be noted that in this embodiment, the strength and deformation of the coffee table legs are tested. Figure 1 As shown, the coffee table legs are subjected to a horizontal load test, and the specific test steps are as follows:

[0037] Step S1, in the initial state (i.e., no load is loaded), the load loading box 10 is placed on the load loading box support plate 11, the load impact buffer cylinder 13 supports the load loading box 10, and the coffee table is placed and fixed on the workbench 1;

[0038] Step S2, connect one end of the rope 9 to the linear bearing 101 on the load loading box 10, then the rope 9 is connected to the coffee table leg through the first pulley 6, the second pulley 7 and the third pulley 8, and the height of the third pulley 8 is adjusted so that the rope 9 is connected to the coffee table leg in a horizontal state after passing through the pulley 8;

[0039] Step S3, the motor 2 is powered on to rotate, driving the screw rod 4 to rotate, driving the load loading box support plate 11 to descend, so that the load loading box 10 is suspended in the air;

[0040] Step S4, using the distance measuring sensor 12 on the load loading box support plate 11 to measure the vertical distance D1 from the load loading box 10 to the distance measuring sensor 12;

[0041] Step S5, put a load (in this embodiment, a standard sand bag is used as the load) into the load loading box 10. If 500N (Newton) is required, the weight of the standard sand bag is 500N-M1 (M1 is the weight of the load loading box 10 itself);

[0042] Step S6, after the load is loaded, the entire test device is kept stationary, and after a predetermined loading time (such as 10 seconds, 1 minute, 1 day, 7 days, etc.) is reached, the distance sensor 12 is used to measure the vertical distance D2 from the load loading box 10 to the distance sensor 12 again;

[0043] When the tested sample (the coffee table leg) is deformed, the load loading box 10 will be displaced vertically downward along the linear optical axis 5, causing the vertical distance between the load loading box 10 and the distance measuring sensor 12 to change from the initial state;

[0044] Step S7: After the vertical distance D2 is measured, the test ends; check whether the tested sample (coffee table leg) is damaged, and calculate the deformation (D1-D2).

[0045] Among them, in step S2, for different tested samples, the angle of the loading direction of the test will be different, and the change of the loading angle can be achieved by adjusting the pulley position in the pulley assembly; when the rope 9 is connected to the tested sample through the first pulley 6, the second pulley 7 and the third pulley 8, the loading angle is adjusted by adjusting the height of the third pulley 8; when the rope 9 is connected to the tested sample through the first pulley 6, the second pulley 7 and the fourth pulley 14, the loading angle is adjusted by adjusting the position of the fourth pulley 14; when the rope 9 is connected to the tested sample through the first pulley 6, the second pulley 7, the third pulley 8 and the fourth pulley 14, the loading angle is adjusted by adjusting the height of the third pulley 8 and the position of the fourth pulley 14 respectively.

[0046] In step S6, the distance measuring sensor 12 can collect distance data at multiple time points during the loading time to form a curve of deformation variation.

[0047] In summary, compared with the prior art, the furniture strength and deformation testing device and testing method provided by the present invention have the advantages of simple structure, accurate single and continuous load loading, and the ability to achieve loading at different angles.

[0048] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A furniture strength and deformation testing device, characterized in that: Include: A workbench (1) for placing and fixing the sample to be tested; A support assembly is fixedly connected to the workbench (1); a vertical rod assembly is fixedly arranged on the support assembly; the support assembly comprises: A second profile (A2) fixedly connected to one side of the workbench (1); The frame (3) is structured as a frame with a half-open bottom, and the frame opening is fixedly connected to two sides of the second profile (A2); A first profile (A1) having a structure of a frame with a half-open bottom, arranged below the frame (3); The frame opening of the first profile (A1) is fixedly connected to the top surface of the second profile (A2), the frame height of the first profile (A1) matches the frame height of the rack (3), and the horizontal frame of the first profile (A1) is vertically arranged with the horizontal frame of the rack (3); The load assembly is sleeved on the vertical pole assembly and moves along the vertical pole assembly after being loaded with a load; The upright assembly comprises: Two screw rods (4) are symmetrically arranged on the inner side of the frame of the frame (3), and two ends of each screw rod (4) are respectively fixedly connected to the horizontal frame of the frame (3) and the second profile (A2); Two linear optical axes (5) are symmetrically arranged on the inner sides of the two screw rods (4), and two ends of each linear optical axis (5) are respectively fixedly connected to the horizontal frame of the frame (3) and the second profile (A2); The load assembly comprises: A load loading box (10), the two ends of which are respectively sleeved on the two linear optical axes (5), so that the load loading box (10) can move vertically along the linear optical axes (5); The load loading box (10) is also fixedly provided with a linear bearing (101) for connecting with the rope (9); A load loading box support plate (11) is disposed below the load loading box (10), and its two ends are fixedly connected to the two screw rods (4) via nuts, so that the load loading box support plate (11) can move up and down as the screw rods (4) rotate; A plurality of load impact buffer cylinders (13) which are evenly arranged at the bottom of the load loading box support plate (11) and are used to support the load loading box (10); A pulley assembly is fixedly disposed on the support assembly; the pulley assembly comprises: A first pulley (6) is fixedly mounted on the horizontal frame of the first profile (A1) and aligned with the bottom center of the load loading box (10) to ensure that the force applied by the load loading box (10) to the rope (9) passing around the first pulley (6) is vertically downward; A second pulley (7) fixedly arranged at the connection between the horizontal frame of the first profile (A1) and the vertical frame close to the workbench (1); A third pulley (8) is fixedly arranged on a vertical frame of the first profile (A1) close to the workbench (1), and its position height can be adjusted according to the height of the sample to be tested; a fourth pulley (14) fixedly mounted on the second profile (A2) and located between the workbench (1) and a vertical frame of the first profile (A1) on which the third pulley (8) is mounted, and a position of the fourth pulley (14) from the workbench (1) can be adjusted according to a loading angle required for a test; One end of the rope (9) is fixedly connected to the linear bearing (101) of the load loading box (10), and the other end is sequentially connected to the first pulley (6), the second pulley (7), the third pulley (8), and / or the fourth pulley (14) and then connected to the tested sample placed on the workbench (1); A rope (9), one end of which is connected to the sample to be tested, and the other end of which is fixedly connected to the load assembly via a pulley assembly, so that the sample to be tested is connected to the load assembly; A distance measuring sensor (12), which is arranged on the load assembly and is used to test the displacement of the load assembly; The load assembly is loaded with a weight, and the load assembly is moved along the upright pole assembly by the force exerted by the weight, and a tensile force is exerted on the rope (9), thereby exerting a tensile force on the sample to be tested, and the displacement of the load assembly is measured by a distance measuring sensor (12) to obtain the strength and deformation of the sample to be tested.

2. The furniture strength and deformation testing device according to claim 1, characterized in that: The distance measuring sensor (12) is fixedly arranged at the center of the load loading box support plate (11) and is directly opposite to the bottom center of the load loading box (10), thereby ensuring the accuracy of the measured displacement data.

3. The furniture strength and deformation testing device according to claim 1, characterized in that: A motor (2) is also provided at the extension portion of the horizontal frame of the frame (3), and each of the lead screws (4) is respectively connected to the motor (2) and driven by the motor (2) to rotate, thereby driving the load loading box support plate (11) to move up and down.

4. The furniture strength and deformation testing device according to claim 3, characterized in that: The center of the horizontal frame of the first profile (A1) is fixedly connected to the center of the horizontal frame of the frame (3).

5. The furniture strength and deformation testing device according to claim 1, characterized in that: A load storage box (15) is also included, which is used to store standard sand bags as heavy loads.

6. A method for testing furniture strength and deformation, characterized in that: The furniture strength and deformation test device according to any one of claims 1 to 5 is used, and the measuring steps include: Step S1, when no load is loaded, the load loading box (10) is placed on the load loading box support plate (11), the load impact buffer cylinder (13) supports the load loading box (10), and the test sample is placed and fixed on the workbench (1); Step S2, connecting one end of the rope (9) to the linear bearing (101) on the load loading box (10), and then connecting the rope (9) to the tested sample through the pulley assembly, and adjusting the position of the pulley assembly so that the load loading angle meets the test requirements; Step S3, the motor (2) is powered on to rotate, driving the screw rod (4) to rotate, driving the load loading box support plate (11) to descend, so that the load loading box (10) is suspended in the air; Step S4, using the distance measuring sensor (12) on the load loading box support plate (11) to measure the vertical distance D1 from the load loading box (10) to the distance measuring sensor (12); Step S5, placing a load into the load loading box (10); Step S6, after the load is loaded, the entire test device is kept stationary, and after a predetermined loading time is reached, the distance measuring sensor (12) is used to measure the vertical distance D2 from the load loading box (10) to the distance measuring sensor (12) again; Step S7: After the vertical distance D2 is measured, the test is completed to check whether the tested sample is damaged and calculate the deformation D1-D2.

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