Device for testing bending fatigue resistance of PVC (polyvinyl chloride) sheet

Abstract

The utility model discloses a PVC (polyvinyl chloride) sheet bending fatigue resistance testing device which comprises an operating table, semicircular angle scale marks are arranged at the side top of the operating table, a connecting block is arranged at the top of the rear side of the operating table, and a containing groove for containing the end of a PVC sheet is formed in the top of the connecting block. A semicircular angle scale mark is arranged on the top of the operating table, a pointer for pointing to the semicircular angle scale mark is arranged on the rear side of the connecting block, a bending assembly for testing the bending fatigue resistance of the PVC sheet is arranged on the top of the operating table, and a limiting piece for limiting the moving track of the connecting block is arranged on the top of the operating table. When the bending fatigue resistance of the PVC sheet is tested, the bending angle value of each time is accurately displayed, so that the bending angle of the sheet is conveniently and intuitively checked, and the quantitative analysis of the bending resistance of the PVC sheet is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of PVC sheet performance testing technology, specifically relating to a device for testing the bending fatigue performance of PVC sheets. Background Technology

[0002] In the field of materials science, testing the flexural fatigue resistance of plastic materials such as PVC sheets is crucial. Performance testing helps assess the durability and reliability of materials under repeated bending stress, which is of great significance for ensuring product quality and safety. However, traditional testing methods suffer from technical problems such as low testing accuracy, complex operation, and inability to visually display the bending angle.

[0003] To address these issues, a testing device is needed that can accurately measure the bending angle of PVC sheets in bending fatigue tests, and is easy to operate and safe and reliable.

[0004] To address this, a device for testing the bending fatigue resistance of PVC sheets is proposed. Utility Model Content

[0005] To address the aforementioned technical problems, the purpose of this utility model is to provide a PVC sheet bending fatigue performance testing device that can intuitively display the bending angle, facilitating quantitative analysis of the bending performance of PVC sheets, thereby solving the technical problems of low testing accuracy, complex operation, and inability to intuitively display the bending angle in traditional testing methods.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A device for testing the bending fatigue resistance of PVC sheets includes an operating table. A semi-circular angle scale line is provided on the top side of one side of the operating table. A connecting block is provided on the top of the rear side of the operating table. A receiving groove for accommodating the end of the PVC sheet is opened on the top of the connecting block. A pointer for pointing to the semi-circular angle scale line is provided on the rear side of the connecting block. A bending component for testing the bending fatigue resistance of PVC sheets is provided on the top of the operating table. A limiting member for limiting the movement trajectory of the connecting block is provided on the top of the operating table.

[0008] The bending assembly includes a circular groove formed on the top of the operating table, a rotating disk rotatably connected to the inner cavity of the circular groove, two sets of fixing columns fixedly installed at the top center of the rotating disk, two sets of fixing strips fixedly installed at the top center of the front side of the operating table, and a rotating component for rotating the rotating disk is provided in the inner cavity of the operating table.

[0009] As a further embodiment of this utility model, the rotating component includes a first cavity formed inside the operating table and located below the circular groove, and a second cavity formed inside the operating table and on one side of the first cavity. A worm gear is rotatably connected inside the first cavity, and a connecting column is fixedly connected to the top of the worm gear. One end of the top of the connecting column extends upward through the first cavity and is fixedly connected to the bottom center of the rotating disk. A worm is rotatably connected inside the second cavity, and the surface of the worm meshes with the surface of the worm gear. A connecting rod is fixedly connected to one end of the worm, and one end of the connecting rod extends to the front side of the operating table.

[0010] As a further embodiment of this utility model, the limiting member includes a semi-circular groove formed on the top of the operating table and located inside the semi-circular angle scale line. A guide rod is slidably connected to the inner cavity of the semi-circular groove, and the top of the guide rod is fixedly connected to the bottom surface of the connecting block.

[0011] As a further embodiment of this utility model, a pressure plate is provided on one side of the inner wall surface of the receiving groove, and a hand-tightening bolt is threadedly connected to one side of the connecting block. One end of the hand-tightening bolt is threaded through the connecting block and fixedly connected to the surface of the pressure plate.

[0012] As a further embodiment of this utility model, a fixing plate is fixedly connected to the center of the rear side of the operating table, and support blocks are fixedly connected to the top of both sides of the fixing plate. A fixing rod is fixedly connected between the two sets of support blocks, and a fixing ring is rotatably sleeved on the surface of the fixing rod. A connecting plate is fixedly connected to the top of the fixing ring, and one end of the connecting plate extends upward toward the operating table. A protective cover is fixedly connected to one end of the connecting plate located above the operating table.

[0013] As a further embodiment of this utility model, a handwheel is fixedly connected to one end of the connecting rod located on the front side of the operating table.

[0014] Compared with existing technologies, the PVC sheet bending fatigue performance testing device provided by this utility model has the following advantages:

[0015] 1. This utility model, through the setting of semi-circular angle scale lines and pointers, with the semi-circular angle scale lines on one side of the operating table cooperating with the pointers on the rear side of the connecting block, accurately displays the angle value of each bend when testing the bending fatigue performance of PVC sheets, thus facilitating intuitive viewing of the bending angle of the sheet and aiding in the quantitative analysis of the bending performance of PVC sheets.

[0016] 2. By incorporating a rotating component, the worm gear transmission structure of this invention possesses self-locking properties. When the handwheel is turned, the worm drives the worm wheel to rotate, thereby driving the rotating disk to bend the PVC sheet. The worm wheel can remain in its current position, preventing accidental reversal of the rotating disk without the need for an additional locking device. This ensures the stability of the bending angle and improves the safety and convenience of operation.

[0017] 3. By setting up a protective cover, this utility model can effectively block flying debris and other factors generated during the testing of PVC sheets, thereby reducing the possibility of accidental injury to operators. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 ;

[0021] Figure 3 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the receiving groove in an embodiment of this utility model.

[0023] Figure label:

[0024] 100. Operating table; 101. Semicircular groove; 102. Circular groove; 103. First cavity; 104. Second cavity; 200. Protective cover; 201. Fixing ring; 202. Connecting plate; 203. Fixing rod; 204. Support block; 205. Fixing plate; 300. Fixing strip; 301. Rotating disk; 302. Connecting block; 303. Fixing column; 304. Receiving groove; 305. Pressure plate; 306. Hand-tightening bolt; 307. Guide rod; 400. Semicircular angle scale line; 401. Pointer; 500. Handwheel; 501. Connecting column; 502. Worm gear; 503. Worm; 504. Connecting rod. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0027] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0028] See appendix Figure 1-4 As shown in the figure, an embodiment of the present invention discloses a PVC sheet bending fatigue performance testing device, including an operating table 100. A semi-circular angle scale line 400 is provided on the top of one side of the operating table 100. A connecting block 302 is provided on the top of the rear side of the operating table 100. A receiving groove 304 for accommodating the end of the PVC sheet is opened on the top of the connecting block 302. A pointer 401 for pointing to the semi-circular angle scale line 400 is provided on the rear side of the connecting block 302. A bending component for testing the bending fatigue performance of the PVC sheet is provided on the top of the operating table 100. A limiting member for limiting the movement trajectory of the connecting block 302 is provided on the top of the operating table 100.

[0029] The bending assembly includes a circular groove 102 formed on the top of the operating table 100. A rotating disk 301 is rotatably connected to the inner cavity of the circular groove 102. Two sets of fixing posts 303 are fixedly installed at the top center of the rotating disk 301. Two sets of fixing strips 300 are fixedly installed at the top center of the front side of the operating table 100. A rotating component for rotating the rotating disk 301 is provided in the inner cavity of the operating table 100. A semi-circular angle scale line 400 on one side of the operating table 100 cooperates with a pointer 401 on the rear side of the connecting block 302. When testing the bending fatigue performance of PVC sheets, the angle value of each bend can be accurately displayed, which makes it easy for the test personnel to intuitively view the bending angle of the sheet and is conducive to the quantitative analysis of the bending performance of PVC sheets.

[0030] The rotating component includes a first cavity 103 formed inside the operating table 100 and located below the circular groove 102. A second cavity 104 is formed inside the operating table 100 and on one side of the first cavity 103. A worm gear 502 is rotatably connected inside the first cavity 103. A connecting post 501 is fixedly connected to the top of the worm gear 502. One end of the top of the connecting post 501 extends upward through the first cavity 103 and is fixedly connected to the bottom center of the rotating disk 301. A worm 503 is rotatably connected inside the second cavity 104. The surface of the worm 503 meshes with the surface of the worm gear 502. One end of the worm 503... A connecting rod 504 is fixedly connected to the end of the control panel 100. One end of the connecting rod 504 extends to the front of the control panel 100. A handwheel 500 is fixedly connected to one end of the connecting rod 504 located at the front of the control panel 100. The worm gear 502 and worm 503 transmission structure in the rotating component has self-locking properties. When the handwheel 500 is turned, the worm 503 drives the worm wheel 502 to rotate, thereby driving the rotating disk 301 to bend the PVC sheet. The worm gear 502 and worm 503 can remain in the current position. No additional locking device is needed to prevent the rotating disk 301 from accidentally reversing, ensuring the stability of the bending angle and improving the safety and convenience of operation.

[0031] The limiting component includes a semi-circular groove 101 located on the top of the operating table 100 and inside the semi-circular angle scale line 400. A guide rod 307 is slidably connected to the inner cavity of the semi-circular groove 101. The top of the guide rod 307 is fixedly connected to the bottom surface of the connecting block 302. The limiting component effectively restricts the movement direction of the connecting block 302 and ensures the accuracy of angle measurement.

[0032] A pressure plate 305 is provided on one side of the inner wall surface of the receiving groove 304. A hand-tightening bolt 306 is threadedly connected to one side of the connecting block 302. One end of the hand-tightening bolt 306 is threaded through the connecting block 302 and fixedly connected to the surface of the pressure plate 305. In use, the hand-tightening bolt 306 is turned, and the hand-tightening bolt 306 pushes the pressure plate 305 toward one side of the inner wall of the receiving groove 304 to fix the PVC sheet. At the same time, the operator can easily adjust the pressure of the pressure plate 305 according to the thickness and material of the PVC sheet to ensure that the PVC sheet will not shift or loosen during bending.

[0033] It is worth noting that a fixed plate 205 is fixedly connected to the center of the rear side of the operating table 100. Support blocks 204 are fixedly connected to the top of both sides of the fixed plate 205. A fixed rod 203 is fixedly connected between the two sets of support blocks 204. A fixed ring 201 is rotatably sleeved on the surface of the fixed rod 203. A connecting plate 202 is fixedly connected to the top of the fixed ring 201. One end of the connecting plate 202 extends upward toward the operating table 100. A protective cover 200 is fixedly connected to one end of the connecting plate 202 located above the operating table 100. During the PVC sheet testing process, the protective cover 200 can effectively block the flying objects, debris and other factors generated by bending, reducing the possibility of accidental injury to the operator.

[0034] When performing a bending fatigue performance test on a PVC sheet using this embodiment of the invention, one end of the PVC sheet is placed in the receiving groove 304 at the top of the connecting block 302, the middle part of the PVC sheet is located between two sets of fixing posts 303, and the tail of the PVC sheet is located between two sets of fixing strips 300. The hand-tightening bolt 306 is tightened, which pushes the pressure plate 305 toward one side of the inner wall of the receiving groove 304 to fix the PVC sheet in the receiving groove 304. The protective cover 200 is then flipped over to cover the operating table 100.

[0035] Hold the handwheel 500 fixedly connected to one end of the connecting rod 504 on the front side of the operating table 100, and rotate the handwheel 500. The rotation of the handwheel 500 drives the connecting rod 504 to rotate, which in turn drives the worm gear 503 to rotate, thereby driving the worm wheel 502 to rotate. The rotating disk 301 is then driven to rotate by the connecting column 501.

[0036] The two sets of fixing posts 303 fixedly installed at the top center of the rotating disk 301 play a role. The other side of the PVC sheet is sandwiched between the two sets of fixing posts 303 and the two sets of fixing strips 300 at the top center of the front side of the operating table 100. As the rotating disk 301 rotates, the fixing posts 303 pull the PVC sheet to start bending around the center, gradually changing the shape of the PVC sheet.

[0037] During the bending process, the connecting block 302 will move along with the bending of the PVC sheet. The pointer 401 set on the rear side of the connecting block 302 will move synchronously on the semi-circular angle scale line 400 on the top side of the operating table 100. By observing the scale value corresponding to the semi-circular angle scale line 400 pointed to by the pointer 401, the current bending angle of the PVC sheet can be known in real time and accurately.

[0038] In summary, in this embodiment of the present invention, the semi-circular angle scale line 400 on one side of the operating table 100 cooperates with the pointer 401 on the rear side of the connecting block 302 to accurately display the angle value of each bend when testing the bending fatigue performance of PVC sheet, thereby facilitating intuitive viewing of the bending angle of the sheet and aiding in the quantitative analysis of the bending performance of PVC sheet.

[0039] The above description illustrates the basic principles of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The above embodiments and descriptions in the specification are only for illustrating the principles of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A PVC sheet bending fatigue resistance performance testing device, comprising an operation table (100), characterized in that: The operating platform (100) is provided with a semicircular angle scale line (400) on one side of the top, and is provided with a connecting block (302) on the rear side of the top, the top of the connecting block (302) is provided with an accommodating groove (304) for accommodating the end of the PVC sheet, and the rear side of the connecting block (302) is provided with a pointer (401) for pointing to the semicircular angle scale line (400), the top of the operating platform (100) is provided with a bending assembly for testing the bending fatigue resistance of the PVC sheet, and the top of the operating platform (100) is provided with a limiting piece for limiting the movement track of the connecting block (302). The bending assembly comprises a circular groove (102) formed in the top of the operating platform (100), the inner cavity of the circular groove (102) is rotatably connected with a rotating disc (301), the top center of the rotating disc (301) is fixedly connected with two groups of fixed columns (303), the top center of the front side of the operating platform (100) is fixedly connected with two groups of fixed strips (300), and the inner cavity of the operating platform (100) is provided with a rotating piece for rotating the rotating disc (301).

2. The PVC sheet bending fatigue resistance performance testing device according to claim 1, characterized in that: The rotating piece comprises a first cavity (103) formed in the inner cavity of the operating platform (100) and located below the circular groove (102), a second cavity (104) is formed in the inner cavity of the operating platform (100) and located on one side of the first cavity (103), the inner cavity of the first cavity (103) is rotatably connected with a worm gear (502), the top of the worm gear (502) is fixedly connected with a connecting column (501), one end of the top of the connecting column (501) penetrates the first cavity (103) upward and is fixedly connected to the bottom center of the rotating disc (301), the inner cavity of the second cavity (104) is rotatably connected with a worm (503), the surface of the worm (503) is engaged with the surface of the worm gear (502), one end of the worm (503) is fixedly connected with a connecting rod (504), and one end of the connecting rod (504) extends to the front side of the operating platform (100).

3. The device for testing the bending fatigue resistance of PVC sheet material according to claim 2, characterized in that: The limiting piece comprises a semicircular groove (101) formed in the top of the operating platform (100) and located inside the semicircular angle scale line (400), the inner cavity of the semicircular groove (101) is slidably connected with a guide rod (307), and the top of the guide rod (307) is fixedly connected to the bottom surface of the connecting block (302).

4. The device for testing the bending fatigue resistance of PVC sheet material according to claim 3, characterized in that: One side of the inner wall surface of the accommodating groove (304) is provided with a pressure plate (305), one side surface of the connecting block (302) is threadedly connected with a hand screw bolt (306), and one end of the hand screw bolt (306) is threadedly penetrated through the connecting block (302) and fixedly connected to the surface of the pressure plate (305).

5. The device for testing the bending fatigue resistance of PVC sheet material according to claim 4, characterized in that: The operating platform (100) is fixedly connected with a fixed plate (205) at the center of the rear side, both sides of the top of the fixed plate (205) are fixedly connected with a supporting block (204), two groups of the supporting blocks (204) are fixedly connected with a fixed rod (203), the surface of the fixed rod (203) is rotatably sleeved with a fixed ring (201), the top of the fixed ring (201) is fixedly connected with a connecting plate (202), one end of the connecting plate (202) extends upwards above the operating platform (100), and one end of the connecting plate (202) located above the operating platform (100) is fixedly connected with a protective cover (200).

6. The device for testing the bending fatigue resistance of PVC sheet material according to claim 5, characterized in that: One end of the connecting rod (504) located at the front side of the operating platform (100) is fixedly connected with a hand wheel (500).

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