Leather product tear strength testing device

Abstract

The invention discloses a leather product tear strength testing device, and relates to the technical field of tear strength testing, the leather product tear strength testing device comprises a mounting plate, and also comprises a fixed table fixedly mounted on the mounting plate; the movable plate located in the middle is fixedly installed on the installation plate, the other two movable plates are installed on the installation plate in a sliding mode, a clamp is installed on each movable plate through a pulling assembly, and the pulling assemblies are used for applying stable pulling force to the clamps. The device has the advantages that different tear resistance tests can be performed on a new material leather product according to test requirements by utilizing the two movable plates capable of being unfolded, and particularly, the tear resistance test under linear tension, the tear resistance test under different angle tension and the tear resistance test under different tear effects can be performed on the new material leather product; the comprehensiveness of a test result is greatly improved, and the reliability and the safety of a new material leather product in practical application can be better ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of tear strength testing, and particularly to a tear strength testing device for leather products. Background Art

[0002] Traditional leather refers to products made from animal skins through a series of physical and chemical processes. At present, with the development of technology, materials with leather properties can also be manufactured by using modern scientific and technological means through technologies such as chemical synthesis, biological engineering, and physical modification. Compared with traditional leather materials, such new material leather products have the characteristics of being more environmentally friendly, durable, and comfortable, and are currently widely used.

[0003] During the production process of new material leather products, it is necessary to test their tear strength to ensure their reliability and safety in actual applications. During the use of current tear strength testing devices, generally, a linear tensile force is applied to a single piece of leather product, and it is impossible to test the tear strength of a single piece of leather under different tearing actions or the tear strength of multiple pieces of leather under tensile forces at different angles. The obtained tear strength results are not comprehensive enough. Therefore, it is necessary to design a tear strength testing device for leather products. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a tear strength testing device for leather products, which solves the problems raised in the above background art.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A tear strength testing device for leather products, including a mounting plate, and further including:

[0007] A fixed table, which is fixedly installed on the mounting plate;

[0008] A plurality of moving plates. The moving plate located in the middle is fixedly installed on the mounting plate, and the other two moving plates are slidably installed on the mounting plate. A clamp is installed on each moving plate through a pulling assembly, and the pulling assembly is used to apply a stable tensile force to the clamp. The fixed table and the plurality of clamps are used to clamp and fix the leather product;

[0009] An unfolding part, which is used to adjust the included angle of the moving plates on both sides. The unfolding part includes a rotating shaft fixedly installed at the bottom of the mounting plate. Two connecting rods are rotatably installed on the rotating shaft, and a connecting component is installed between each of the two connecting rods and the corresponding moving plate. A horizontal pulling component is installed on the mounting plate and is matched with the two connecting rods.

[0010] Further, a groove is formed in the fixed table. A screw rod is rotatably installed on the fixed table, and a pressing plate is threadedly connected to one end of the screw rod located in the groove. An adjusting knob is fixedly installed at the top of the screw rod. A clamping groove is formed in the fixture, and a threaded rod is rotatably installed on the fixture. A clamping plate is threadedly connected to one end of the threaded rod located in the clamping groove, and a control knob is fixedly installed at the top of the threaded rod. The clamping groove and the groove are at the same horizontal height.

[0011] Further, the pulling assembly consists of a fixed block, a sliding groove, a sliding block, a first tension gauge, and a pull rod. The sliding groove is formed in the moving plate. The sliding block is slidably installed in the sliding groove. The fixed block is also slidably installed in the sliding groove, and the top of the fixed block is fixedly connected to the fixture. The first tension gauge is fixedly installed on the side wall of the sliding block. The pull rod is fixedly installed between the first tension gauge and the fixed block, and the pull rod is slidably engaged with the sliding block.

[0012] Further, a second lead screw is rotatably installed on the middle moving plate, and the second lead screw is threadedly connected to the corresponding sliding block. The second lead screw is slidably engaged with the corresponding fixed block. A first lead screw is rotatably installed on each of the other two moving plates, and the two first lead screws are respectively threadedly connected to the corresponding sliding blocks. The two first lead screws are respectively slidably engaged with the corresponding fixed blocks.

[0013] Further, two rotating rods are rotatably installed on the fixed table, and universal joints are installed between the two rotating rods and the corresponding first lead screws. Three driving motors are fixedly installed on the side wall of the fixed table, and the output ends of the three driving motors are respectively fixedly connected to the corresponding rotating rods and the second lead screw.

[0014] Further, the connecting assembly consists of a connecting rod, a sliding disk, and an arc-shaped groove. The connecting rod is fixedly installed on the connecting rod. The arc-shaped groove is formed in the mounting plate. The sliding disk is slidably installed on the arc-shaped groove, and the sliding disk is fixedly connected to the moving plate and the connecting rod.

[0015] Further, the horizontal pulling assembly consists of a fixed rod, a moving groove, a bidirectional lead screw, a servo motor, two mounting blocks, two mounting frames, two moving blocks, and two second tension gauges. The fixed rod is installed at the other end of the connecting rod. The moving groove is formed in the bottom of the mounting plate. The bidirectional lead screw is rotatably installed in the moving groove. The servo motor is fixedly installed on the mounting plate, and the output end of the servo motor is fixedly connected to the bidirectional lead screw. The two moving blocks are both threadedly connected to the bidirectional lead screw. The two second tension gauges are respectively fixedly installed on the corresponding moving blocks. The two mounting blocks are both slidably installed in the moving groove, and the two mounting blocks are respectively fixedly connected to the corresponding second tension gauges through a second pull rod. The two mounting frames are respectively fixedly installed on the side walls of the two mounting blocks, and the two mounting frames are respectively rotatably engaged with one end of the corresponding fixed rod.

[0016] Furthermore, one end of the connecting rod away from the sliding disc is provided with a telescopic groove, and a telescopic rod fixedly connected to the fixed rod is slidably installed in the telescopic groove, and a tension spring is installed between the telescopic rod and the telescopic groove.

[0017] Compared with the existing technology, the advantages of the present invention are as follows:

[0018] 1: Through the design of two deployable moving plates, after fixing multiple new material leather products, the angles of two of the new material leather products can be adjusted, and then the tear resistance of the new material leather products at different angles can be tested, which can effectively improve the comprehensiveness of the test results.

[0019] 2: Through the cooperation of the horizontal pulling assembly and the connecting assembly, after fixing a single new material leather product, the tear resistance of the new material leather product under different tearing actions can be tested by continuously expanding the opening angles of the two moving plates, further improving the comprehensiveness of the test results.

[0020] In summary, the present invention uses two deployable moving plates to perform different tear resistance tests on new material leather products according to test needs. Specifically, it can perform tear resistance tests under linear tension, tear resistance tests under different angle tensions, and tear resistance tests under different tearing actions on the new material leather products, greatly improving the comprehensiveness of the test results and better ensuring the reliability and safety of new material leather products in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a device for testing the tear resistance of leather products proposed by the present invention;

[0022] Figure 2 is Figure 1 a schematic structural diagram from another perspective;

[0023] Figure 3 is Figure 1 a schematic structural diagram after removing the mounting plate;

[0024] Figure 4 is Figure 2 a schematic structural diagram after removing the mounting plate;

[0025] Figure 5 is Figure 3 a schematic structural diagram of the structure at the bidirectional lead screw in

[0026] Figure 6 is Figure 5 a schematic enlarged view of the structure of part A in

[0027] Figure 7 is Figure 4 a schematic enlarged view of the structure at the fixture in

[0028] In the figure: 1. mounting plate; 2. fixed table; 3. moving plate; 4. adjusting knob; 5. fixture; 6. control knob; 7. clamping plate; 8. fixed block; 9. sliding groove; 10. slider; 11. first lead screw; 12. second lead screw; 13. first tensiometer; 14. pull rod; 15. rotating rod; 16. universal joint; 17. arc groove; 18. sliding disk; 19. connecting rod; 20. connecting rod; 21. fixed rod; 22. rotating shaft; 23. moving groove; 24. mounting block; 25. mounting bracket; 26. double lead screw; 27. moving block; 28. second tensiometer; 29. servo motor. Specific implementation manner

[0029] Referring to Figures 1-7 , a tear strength testing device for leather products, includes a mounting plate 1. A plurality of support legs are fixedly installed at the bottom of the mounting plate 1 for supporting the device to make it stably placed. It also includes a fixed table 2, which is fixedly installed on the mounting plate 1, and a plurality of moving plates 3. A fixture 5 is installed on each moving plate 3 through a pulling component. The fixed table 2 and the plurality of fixtures 5 are used for clamping and fixing the leather products. A groove is opened on the fixed table 2. A screw rod is also rotatably installed on the fixed table 2, and a pressing plate is threadedly connected to one end of the screw rod located in the groove. An adjusting knob 4 is fixedly installed at the top of the screw rod. A clamping groove is opened on the fixture 5, and a threaded rod is also rotatably installed on the fixture 5. A clamping plate 7 is threadedly connected to one end of the threaded rod located in the clamping groove, and a control knob 6 is fixedly installed at the top of the threaded rod. The clamping groove and the groove are at the same horizontal height. When fixing the leather product, first put one end of it into the groove, then rotate the adjusting knob 4 to fix one end of it with the pressing plate. Then put the other end of the leather product into the corresponding fixture 5 and rotate the control knob 6 to fix the other end of it. Then the tear strength of the leather product can be tested. In order to improve the fixing effect of the fixed table 2 and the fixture 5 on the leather product, corrugated grooves with corresponding shapes can be provided on the clamping groove, the groove, the pressing plate and the clamping plate 7.

[0030] The middle moving plate 3 is fixedly installed on the mounting plate 1, and the other two moving plates 3 are slidably installed on the mounting plate 1. The pulling component is used to apply a stable pulling force to the fixture 5. The pulling component consists of a fixed block 8, a chute 9, a slider 10, a first tension gauge 13 and a pull rod 14. The chute 9 is opened on the moving plate 3. The slider 10 is slidably installed in the chute 9. The fixed block 8 is also slidably installed in the chute 9, and the top of the fixed block 8 is fixedly connected to the fixture 5. The first tension gauge 13 is fixedly installed on the side wall of the slider 10. The pull rod 14 is fixedly installed between the first tension gauge 13 and the fixed block 8, and the pull rod 14 is slidably matched with the slider 10. The first tension gauge 13 is an existing product. When the slider 10 moves in the chute 9, the fixed block 8 is driven to move through the pull rod 14. At this time, the first tension gauge 13 records the pulling force applied by the pull rod 14 to the fixed block 8. When the leather product is fixed between the fixed table 2 and the fixture 5, when the leather product is stretched, due to the limited stretching range of the leather product, the greater the resistance received by the first tension gauge 13, the greater the pulling force at this time. When the leather product is torn, the resistance received by the first tension gauge 13 is the smallest, and the maximum pulling force recorded by the first tension gauge 13 at this time is the tear strength of the leather product.

[0031] A second lead screw 12 is rotatably installed on the middle moving plate 3, and the second lead screw 12 is threadedly connected to the corresponding slider 10. The second lead screw 12 is slidably matched with the corresponding fixed block 8. A first lead screw 11 is rotatably installed on each of the other two moving plates 3, and the two first lead screws 11 are respectively threadedly connected to the corresponding sliders 10. The two first lead screws 11 are respectively slidably matched with the corresponding fixed blocks 8. When the first lead screw 11 and the second lead screw 12 rotate, they provide drive for the movement of the slider 10 in the chute 9, thereby providing power for the linear stretching of the leather product.

[0032] Two rotating rods 15 are rotatably installed on the fixed table 2, and a universal joint 16 is installed between each of the two rotating rods 15 and the corresponding first lead screw 11. Three drive motors are fixedly installed on the side wall of the fixed table 2, and the output ends of the three drive motors are respectively fixedly connected to the corresponding rotating rods 15 and the second lead screw 12. The drive motors are used to provide drive for the rotation of the rotating rods 15 and the second lead screw 12. Under the connection action of the universal joint 16, when the angles of the two side moving plates 3 change on the mounting plate 1, the transmission effect of the rotating rod 15 on the first lead screw 11 can be ensured.

[0033] The expansion part is used to adjust the included angle of the moving plates 3 on both sides. The expansion part includes a rotating shaft 22 fixedly installed at the bottom of the mounting plate 1. Two connecting rods 20 are rotatably installed on the rotating shaft 22, and a connecting component is installed between each of the two connecting rods 20 and the corresponding moving plate 3. The connecting component consists of a connecting rod 19, a sliding disk 18, and an arc-shaped groove 17. The connecting rod 19 is fixedly installed on the connecting rod 20. The arc-shaped groove 17 is opened on the mounting plate 1. The sliding disk 18 is slidably installed in the arc-shaped groove 17, and the sliding disk 18 is fixedly connected to the moving plate 3 and the connecting rod 19. When the connecting rod 20 rotates along the rotating shaft 22, the sliding disk 18 can be driven by the connecting rod 19 to slide in the arc-shaped groove 17, so that the two moving plates 3 are unfolded at a certain angle. Through this design, when testing the tear resistance strength of leather products, one end of a complete leather product can be fixed on the fixed table 2, and the other end can be fixed on the fixture 5 on the two movable moving plates 3. At this time, by using the angle expansion range of the two moving plates 3, the tear resistance strength of the leather product under different tearing effects can be tested, improving the detection range of the device.

[0034] A horizontal pulling component is installed on the mounting plate 1 and is matched with the two connecting rods 20. The horizontal pulling component consists of a fixed rod 21, a moving groove 23, a bidirectional lead screw 26, a servo motor 29, two mounting blocks 24, two mounting brackets 25, two moving blocks 27, and two tension gauges II 28. The fixed rod 21 is installed at the other end of the connecting rod 20. The moving groove 23 is opened at the bottom of the mounting plate 1. The bidirectional lead screw 26 is rotatably installed in the moving groove 23. The servo motor 29 is fixedly installed on the mounting plate 1, and the output end of the servo motor 29 is fixedly connected to the bidirectional lead screw 26. The two moving blocks 27 are both threadedly connected to the bidirectional lead screw 26. The two tension gauges II 28 are respectively fixedly installed on the corresponding moving blocks 27. The two mounting blocks 24 are both slidably installed in the moving groove 23, and the two mounting blocks 24 are respectively fixedly connected to the corresponding tension gauges II 28 through a second pull rod. The two mounting brackets 25 are respectively fixedly installed on the side walls of the two mounting blocks 24, and the two mounting brackets 25 are respectively rotationally matched with one end of the corresponding fixed rod 21. When the servo motor 29 is started, the distance between the two moving blocks 27 can be adjusted, so that the two mounting blocks 24 drive the two fixed rods 21 to rotate in opposite directions along the rotating shaft 22, realizing the adjustment of the unfolding angle of the two moving plates 3. The working principle of the tension gauge II 28 is the same as that of the tension gauge I 13. The tension gauge II 28 is used to detect and record the tear resistance strength of the leather under different tearing effects.

[0035] One end of the connecting rod 20 away from the sliding disc 18 is provided with a telescopic groove, and a telescopic rod fixedly connected to the fixed rod 21 is slidably installed in the telescopic groove. A tension spring is installed between the telescopic rod and the telescopic groove. The telescopic rod, the telescopic groove and the tension spring are not shown in the figure. Through the cooperation of the telescopic rod, the telescopic groove and the tension spring, the two moving plates 3 can smoothly complete the angle change while ensuring that the moving trajectories of the fixed rod 21 and the sliding disc 18 remain unchanged.

[0036] When using this device to test the tear resistance strength of leather, in addition to the above-mentioned tear resistance strength tests under linear tensile force and different tearing actions, three identical leather products can be taken. Then, one end of them is fixed on the fixed table 2 at the same time, and the other end is respectively fixed on the corresponding fixtures 5. Then, the expansion angles of the two moving plates 3 on both sides are adjusted and fixed through the horizontal pulling assembly. Then, multiple driving motors are started to make the three leather products conduct tensile tests at different angles at the same time, so as to detect the tear resistance strength of the leather products at different angles and further improve the test range of this device.

[0037] In order to improve the detection efficiency and the automation degree of this device, a controller and a display screen can be installed on the mounting plate 1. The display screen is used to display the tensile force magnitudes of the first tensiometer 13 and the second tensiometer 28. The controller is used to control the operating conditions of the driving motor and the servo motor 29. Specifically, the controller can adopt a controller of the KV-16AT model, and both the driving motor and the servo motor 29 can adopt a servo motor of the ACM6004M2H model.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above-mentioned embodiments. What is described in the above-mentioned embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A leather product tear strength testing device, comprising a mounting plate (1), characterized in that: Also includes: A fixing platform (2), wherein the fixing platform (2) is fixedly mounted on the mounting plate (1); A plurality of movable plates (3), wherein the movable plate (3) located in the middle is fixedly mounted on the mounting plate (1), and the other two movable plates (3) are slidably mounted on the mounting plate (1); a clamp (5) is mounted on each of the movable plates (3) via a pulling assembly, and the pulling assembly is used to apply a stable pulling force to the clamp (5); the fixed platform (2) cooperates with the plurality of clamps (5) to clamp and fix a single piece of leather product at multiple points, or to clamp and fix a plurality of leather products separately; An unfolding portion, the unfolding portion is used to adjust the angle of the movable plates (3) located on both sides, the unfolding portion comprises a rotating shaft (22) fixedly mounted on the bottom of the mounting plate (1), two connecting rods (20) are rotatably mounted on the rotating shaft (22), and connecting components are installed between the two connecting rods (20) and the corresponding movable plates (3), and a horizontal pulling component matched with the two connecting rods (20) is installed on the mounting plate (1), and the horizontal pulling component is used to adjust the angle of the two corresponding movable plates (3) so as to detect the tearing force of a single leather product at different angles or to detect the tearing strength of multiple leather products in different directions.

2. A leather product tearing strength testing device according to claim 1, characterized in that: The fixing platform (2) is provided with a groove, a screw is rotatably mounted on the fixing platform (2), one end of the screw located in the groove is threadedly connected to a pressure plate, an adjusting knob (4) is fixedly mounted on the top of the screw, a slot is provided on the clamp (5), a threaded rod is rotatably mounted on the clamp (5), one end of the threaded rod located in the slot is threadedly connected to a clamp (7), a control knob (6) is fixedly mounted on the top of the threaded rod, and the slot and the groove are located at the same level.

3. The leather product tearing strength testing device according to claim 1, characterized in that: The pulling assembly is composed of a fixed block (8), a slide groove (9), a slider (10), a dynamometer (13) and a pull rod (14), wherein the slide groove (9) is provided on the movable plate (3), the slider (10) is slidably mounted in the slide groove (9), the fixed block (8) is also slidably mounted in the slide groove (9), and the top of the fixed block (8) is fixedly connected to the clamp (5), the dynamometer (13) is fixedly mounted on the side wall of the slider (10), the pull rod (14) is fixedly mounted between the dynamometer (13) and the fixed block (8), and the pull rod (14) is slidably matched with the slider (10).

4. A leather product tearing strength testing device according to claim 3, characterized in that: A second screw rod (12) is rotatably mounted on the movable plate (3) located in the middle, and the second screw rod (12) is threadedly connected to the corresponding slider (10), and the second screw rod (12) is slidably matched with the corresponding fixed block (8). The other two movable plates (3) are each rotatably mounted with a first screw rod (11), and the two first screw rods (11) are respectively threadedly connected to the corresponding slider (10), and the two first screw rods (11) are respectively slidably matched with the corresponding fixed block (8).

5. The leather product tearing strength testing device according to claim 4, characterized in that: Two rotating rods (15) are rotatably mounted on the fixed platform (2), and universal joints (16) are installed between the two rotating rods (15) and the corresponding screw rod 1 (11). Three driving motors are fixedly mounted on the side wall of the fixed platform (2), and the output ends of the three driving motors are fixedly connected to the corresponding rotating rods (15) and the screw rod 2 (12), respectively.

6. The leather product tearing strength testing device according to claim 1, characterized in that: The connecting assembly is composed of a connecting rod (19), a sliding plate (18) and an arc groove (17); the connecting rod (19) is fixedly mounted on the connecting rod (20); the arc groove (17) is formed on the mounting plate (1); the sliding plate (18) is slidably mounted on the arc groove (17); and the sliding plate (18) is fixedly connected to the movable plate (3) and the connecting rod (19).

7. The leather product tearing strength testing device according to claim 1, characterized in that: The cross-pull assembly is composed of a fixed rod (21), a movable groove (23), a bidirectional lead screw (26), a servo motor (29), two mounting blocks (24), two mounting frames (25), two movable blocks (27) and two dynamometers (28), wherein the fixed rod (21) is mounted on the other end of the connecting rod (20), the movable groove (23) is formed at the bottom of the mounting plate (1), the bidirectional lead screw (26) is rotatably mounted in the movable groove (23), the servo motor (29) is fixedly mounted on the mounting plate (1), and the output end of the servo motor (29) is connected to the mounting plate (1). The bidirectional lead screw (26) is fixedly connected, the two moving blocks (27) are both threadedly connected to the bidirectional lead screw (26), the two dynamometers (28) are respectively fixedly installed on the corresponding moving blocks (27), the two mounting blocks (24) are both slidably installed in the moving groove (23), and the two mounting blocks (24) are respectively fixedly connected to the corresponding dynamometers (28) through the pull rods, the two mounting frames (25) are respectively fixedly installed on the side walls of the two mounting blocks (24), and the two mounting frames (25) are respectively rotatably matched with one end of the corresponding fixed rod (21).

8. The leather product tearing strength testing device according to claim 7, characterized in that: A telescopic slot is formed at one end of the connecting rod (20) away from the sliding plate (18), and a telescopic rod fixedly connected to the fixed rod (21) is slidably installed in the telescopic slot, and a tension spring is installed between the telescopic rod and the telescopic slot.

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