Tensile strength testing machine

Abstract

The utility model discloses a tensile strength testing machine, and relates to the field of tensile strength tests.The tensile strength testing machine comprises a testing machine body and a base, an upper base is fixedly installed on the inner side of the testing machine body, a movable rod is arranged on the upper base in a penetrating mode, a lower connecting piece is installed at the lower end of the movable rod, a fastener is installed in the middle of the lower connecting piece, and a fixing piece is connected to the fastener; the lower end of the fixing piece is connected with an annular piece through a movable shaft, connecting threads are formed in the lower portion of the annular piece, the annular piece is connected with a rotating cylinder through the connecting threads, and an upper connecting stud is arranged at the lower end of the rotating cylinder. Through continuous rotation of the rotating cylinder, the upper connecting stud is connected with the upper part of the test object, after connection is completed, the driving cylinder is started, the output end of the driving cylinder pushes the upper connecting piece to move upwards, the upper connecting piece drives the lower connecting piece to move upwards through the movable rod, and the lower connecting piece drives the rotating cylinder to move upwards step by step through the fixing piece; the rotating cylinder drives the upper part of the test object to stretch upwards, so that the strength test can be performed.

Description

Technical Field

[0001] This application relates to the field of tensile strength tests, and particularly to a tensile strength testing machine. Background Art

[0002] Tensile strength testing machines are widely used in the mechanical property tests of non-metallic materials such as adhesives, rubbers, plastics, textiles, waterproof materials, non-woven fabrics, and metal wires, metal foils, and metal sheets. By adding accessories, compression and bending tests can also be performed. It can stop when the specimen is broken and maintain the peak value; it can measure tensile force, pressure, and input parameters to measure strength; it can measure the force value at a fixed elongation and measure the elongation at a fixed force value; it can display curves; it can adjust the speed either point by point or steplessly. The point-by-point speed adjustment is divided into several levels, and the stepless speed adjustment can be arbitrarily set within the range of 1 - 500 with a certain accuracy.

[0003] Currently, there is a fixing device for the connecting head of a tensile strength testing machine, with poor connection effect, easy to break under force, and poor use effect. When testing the tensile strength, in many cases, the two ends of the test piece are fixed by clamping. When using this method, the connection between the two ends and the test piece is not tight enough. When the force applied by the force-applying member is too large, the clamping part is likely to fall off, so that the strength value of the test piece cannot be tested. Summary of the Utility Model

[0004] In order to solve the problem that the connection between the two ends and the test piece is not tight enough, and the clamping part is likely to fall off when the force applied by the force-applying member is too large, this application provides a tensile strength testing machine.

[0005] The tensile strength testing machine provided by this application adopts the following technical solutions:

[0006] It includes a test body and a base. An upper seat is fixedly installed inside the test body. A movable rod penetrates through the upper seat. A lower connecting member is installed at the lower end of the movable rod. A fastening member is installed in the middle of the lower connecting member. A fixing member is connected to the fastening member. The lower end of the fixing member is connected to an annular member through a movable shaft. A connecting thread is provided at the lower part of the annular member. The annular member is connected to a rotating cylinder through the connecting thread. An upper connecting stud is provided at the lower end of the rotating cylinder.

[0007] By adopting the above technical solutions, the rotating cylinder can be rotated. The upper part of the rotating cylinder cooperates with the connecting thread, so that the rotating cylinder can gradually move downward. At this time, the upper connecting stud at the lower part of the rotating cylinder gradually contacts the upper part of the test object. Through continuous rotation of the rotating cylinder, the upper connecting stud is connected to the upper part of the test object.

[0008] Preferably, a base is fixedly installed at the lower inner part of the test body. A rotating rod is rotatably installed in the middle of the base. The upper end of the rotating rod is connected with a lower connecting stud. The lower connecting stud and the upper connecting stud are arranged opposite to each other up and down. A rotating disk is installed at the lower end of the rotating rod.

[0009] By adopting the above technical solution, when the rotating disk at the bottom is rotated, the rotating disk drives the rotating rod to rotate. When the rotating rod rotates, the cross bar can be gradually lowered through the cooperation of the external thread and the internal thread.

[0010] Preferably, a through hole is formed in the base. A support member is movably installed inside the through hole. The number of the support members is two. The two support members are symmetrically arranged with the lower connecting stud as the center.

[0011] By adopting the above technical solution, when the cross bar is lowered, the support member can be driven to move downward. At this time, the object on the support member moves downward synchronously with the support member under the action of its own gravity.

[0012] Preferably, the upper parts of the two support members are higher than the height of the lower connecting stud, and the lower ends of the two support members are connected by a cross bar.

[0013] By adopting the above technical solution, during the process of the object gradually moving downward, its lower connection part gradually contacts the lower connecting stud. Through the continuous movement of the rotating rod, the lower connecting stud is gradually connected to the test object.

[0014] Preferably, an internal thread is formed in the middle of the cross bar. The rotating rod penetrates through the middle of the cross bar, and an external thread adapted to the internal thread is formed on the rotating rod. The rotating rod is connected to the cross bar through the external thread and the internal thread.

[0015] By adopting the above technical solution, when the rotating rod rotates, the cross bar can be gradually lowered through the cooperation of the external thread and the internal thread. When the cross bar moves downward, the support member can be driven to move downward. At this time, the object on the support member moves downward synchronously with the support member under the action of its own gravity, which is convenient for connection.

[0016] Preferably, the number of the movable rods is two. The upper ends of the two movable rods are connected by an upper connecting member.

[0017] By adopting the above technical solution, it is convenient to drive the two movable rods to move synchronously through the driving device.

[0018] Preferably, a driving cylinder is installed at the top of the test body. The output end of the driving cylinder is connected to the middle of the upper connecting member.

[0019] By adopting the above technical solution, the output end of the driving cylinder pushes the upper connecting member upward, and the upper connecting member drives the lower connecting member upward through the movable rod.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. In the present application, through the continuous rotation of the rotating cylinder, the upper connecting stud is connected to the upper part of the test object. After the connection is completed, the driving cylinder is started. The output end of the driving cylinder pushes the upper connecting member upward. The upper connecting member drives the lower connecting member upward through the movable rod, and the lower connecting member drives the rotating cylinder to gradually move upward through the fixing member. The rotating cylinder drives the upper part of the test object to be stretched upward, so that the strength test can be carried out;

[0022] 2. In the present application, through the rotation of the rotating rod, through the cooperation of the external thread and the internal thread, the cross bar can be gradually moved downward. When the cross bar moves downward, it can drive the supporting member to move downward. At this time, the object on the supporting member moves downward synchronously with the supporting member under the action of its own gravity. During the process of the object gradually moving downward, its lower connection gradually contacts the lower connecting stud. Through the continuous movement of the rotating rod, the lower connecting stud is gradually connected to the test object. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of a tensile strength testing machine according to an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the inner structure of a tensile strength testing machine mainly shown in an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of the front structure of a tensile strength testing machine mainly shown in an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of the enlarged structure of part A of a tensile strength testing machine mainly shown in an embodiment of the present application;

[0027] Figure 5 is a schematic diagram of the enlarged structure of part B of a tensile strength testing machine mainly shown in an embodiment of the present application;

[0028] Reference numerals: 1, test body; 2, base; 3, upper seat; 4, movable rod; 5, lower connecting member; 6, fastening member; 7, fixing member; 8, movable shaft; 9, annular member; 10, connecting thread; 11, rotating cylinder; 12, upper connecting stud; 13, upper connecting member; 14, driving cylinder; 15, base; 16, rotating rod; 17, lower connecting stud; 18, supporting member; 19, cross bar; 20, external thread; 21, rotating disc. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following further describes the present application in detail with reference to the attached Figures 1 - 5 drawings.

[0030] Please refer to the attached Figures 2 - 4, an embodiment of the present application discloses a tensile strength testing machine, which includes a test machine body 1 and a base 2. An upper seat 3 is fixedly installed inside the test machine body 1. A movable rod 4 is arranged through the upper seat 3. A lower connecting member 5 is installed at the lower end of the movable rod 4. By driving the lower connecting member 5 to move upward through the movable rod 4, it is convenient to stretch the lower object. A fastening member 6 is installed in the middle of the lower connecting member 5. A fixing member 7 is connected to the fastening member 6. The lower end of the fixing member 7 is connected to an annular member 9 through a movable shaft 8. A connecting thread 10 is provided at the lower part of the annular member 9. The annular member 9 is connected to a rotating cylinder 11 through the connecting thread 10. The rotating cylinder 11 can be adjusted up and down when it rotates. An upper connecting stud 12 is arranged at the lower end of the rotating cylinder 11. When the lower part is fixed, the rotating cylinder 11 can be rotated. The upper part of the rotating cylinder 11 cooperates with the connecting thread 10, so that the rotating cylinder 11 gradually moves downward. At this time, the upper connecting stud 12 at the lower part of the rotating cylinder 11 gradually contacts the upper part of the test object. Through continuous rotation of the rotating cylinder 11, the upper connecting stud 12 is connected to the upper part of the test object.

[0031] Please refer to the appendix Figure 3 and Figure 5 , a base 15 is fixedly installed at the lower part inside the test machine body 1. A rotating rod 16 is rotatably installed in the middle of the base 15. The upper end of the rotating rod 16 is connected to a lower connecting stud 17. The lower connecting stud 17 and the upper connecting stud 12 are arranged vertically opposite to each other. A rotating disc 21 is installed at the lower end of the rotating rod 16. By rotating the rotating disc 21 at the bottom, the rotating disc 21 drives the rotating rod 16 to rotate. When the rotating rod 16 rotates, the cross bar 19 can be gradually moved downward through the cooperation of the external thread 20 and the internal thread.

[0032] Please refer to the appendix Figure 3 and Figure 5 , a through hole is provided on the base 15. A support member 18 is movably installed inside the through hole. The number of the support members 18 is two. The two support members 18 are symmetrically arranged with the lower connecting stud 17 as the center. The upper parts of the two support members 18 are higher than the height of the lower connecting stud 17, and the lower ends of the two support members 18 are connected by a cross bar 19. When the cross bar 19 moves downward, it can drive the support member 18 to move downward. At this time, the object on the support member 18 moves downward synchronously with the support member 18 under the action of its own gravity.

[0033] Please refer to the appendix Figure 3 and Figure 5, a middle part of the cross bar 19 is provided with internal threads. The rotating rod 16 penetrates through the middle part of the cross bar 19, and external threads 20 adapted to the internal threads are provided on the rotating rod 16. The rotating rod 16 is connected to the cross bar 19 through the external threads 20 and the internal threads. When the rotating rod 16 rotates, the cross bar 19 can be gradually moved downward through the cooperation of the external threads 20 and the internal threads. When the cross bar 19 moves downward, the support member 18 can be driven to move downward. At this time, the object on the support member 18 synchronously moves downward by its own gravity like the support member 18, which is convenient for connection.

[0034] Please refer to the attached Figure 1 and Figure 2 , the number of the movable rods 4 is two. The upper ends of the two movable rods 4 are connected through the upper connecting member 13. A driving cylinder 14 is installed on the top of the test machine body 1. The output end of the driving cylinder 14 is connected to the middle part of the upper connecting member 13. The output end of the driving cylinder 14 pushes the upper connecting member 13 to move upward. The upper connecting member 13 drives the lower connecting member 5 to move upward through the movable rod 4. The lower connecting member 5 drives the rotating cylinder 11 to gradually move upward through the fixing member 7, and the rotating cylinder 11 drives the upper part of the test object to be stretched upward.

[0035] The implementation principle of a tensile strength testing machine according to an embodiment of the present application is as follows: First, place the object whose strength needs to be detected on the support member 18 inside the test machine body 1, and then rotate the rotating disk 21 at the bottom. The rotating disk 21 drives the rotating rod 16 to rotate. When the rotating rod 16 rotates, the cross bar 19 can be gradually moved downward through the cooperation of the external threads 20 and the internal threads. When the cross bar 19 moves downward, the support member 18 can be driven to move downward. At this time, the object on the support member 18 synchronously moves downward by its own gravity like the support member 18. During the process of the object gradually moving downward, its lower connection part gradually contacts the lower connection stud 17. Through the continuous movement of the rotating rod 16, the lower connection stud 17 is gradually connected to the test object. After the lower part is fixed, the rotating cylinder 11 can be rotated. The upper part of the rotating cylinder 11 cooperates with the connecting threads 10, so that the rotating cylinder 11 can be gradually moved downward. At this time, the upper connection stud 12 at the lower part of the rotating cylinder 11 gradually contacts the upper part of the test object. Through the continuous rotation of the rotating cylinder 11, the upper connection stud 12 is connected to the upper part of the test object. After the connection is completed, start the driving cylinder 14. The output end of the driving cylinder 14 pushes the upper connecting member 13 to move upward. The upper connecting member 13 drives the lower connecting member 5 to move upward through the movable rod 4. The lower connecting member 5 drives the rotating cylinder 11 to gradually move upward through the fixing member 7, and the rotating cylinder 11 drives the upper part of the test object to be stretched upward, so that the strength test can be carried out.

[0036] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A tensile strength testing machine, characterized in that: It includes a test body (1) and a base (2). An upper seat (3) is fixedly installed inside the test body (1). A movable rod (4) is arranged through the upper seat (3). A lower connecting piece (5) is installed at the lower end of the movable rod (4). A fastening piece (6) is installed in the middle of the lower connecting piece (5). A fixing piece (7) is connected to the fastening piece (6). The lower end of the fixing piece (7) is connected to an annular piece (9) through a movable shaft (8). A connecting thread (10) is provided at the lower part of the annular piece (9). The annular piece (9) is connected to a rotating cylinder (11) through the connecting thread (10). An upper connecting stud (12) is arranged at the lower end of the rotating cylinder (11).

2. The tensile strength testing machine according to claim 1, characterized in that: A base (15) is fixedly installed at the lower inner side of the test body (1). A rotating rod (16) is rotatably installed in the middle of the base (15). The upper end of the rotating rod (16) is connected to a lower connecting stud (17). The lower connecting stud (17) and the upper connecting stud (12) are arranged opposite to each other vertically. A rotating disc (21) is installed at the lower end of the rotating rod (16).

3. The tensile strength testing machine according to claim 2, wherein: A through hole is provided on the base (15). A support piece (18) is movably installed inside the through hole. The number of the support pieces (18) is two. The two support pieces (18) are symmetrically arranged with the lower connecting stud (17) as the center.

4. The tensile strength testing machine according to claim 3, characterized in that: The upper parts of the two support pieces (18) are higher than the height of the lower connecting stud (17), and the lower ends of the two support pieces (18) are connected by a cross bar (19).

5. A tensile strength testing machine according to claim 4, characterized in that: Internal threads are provided in the middle of the cross bar (19). The rotating rod (16) penetrates through the middle of the cross bar (19), and external threads (20) adapted to the internal threads are provided on the rotating rod (16). The rotating rod (16) is connected to the cross bar (19) through the external threads (20) and the internal threads.

6. The tensile strength testing machine according to claim 1, characterized in that: The number of the movable rods (4) is two. The upper ends of the two movable rods (4) are connected by an upper connecting piece (13).

7. A tensile strength testing machine according to claim 6, characterized in that: A driving cylinder (14) is installed at the top of the test body (1). The output end of the driving cylinder (14) is connected to the middle of the upper connecting piece (13).

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