Tensile strength testing device for chain

Abstract

The utility model provides a chain tensile strength testing device, which relates to the technical field of chain testing devices and comprises a base, two pairs of supporting legs fixedly mounted at the bottom of the base, a back plate fixedly connected to the top of the base, a protective box fixedly mounted on the front side of the back plate, and a protective door arranged on the protective box. According to the device, an operator is protected through the protection box and the protection door, fragment flying caused by chain breakage is avoided, a stretching test is conducted on the chain through the test assembly, the operator can know the stretching coefficient of the chain without influence through the arrangement of the measurement assembly, and the operator can conveniently observe the condition of the chain through the transparent protection door; and the condition that the degree is influenced by excessive stretching is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of chain testing devices, specifically a chain tensile strength testing device. Background Technology

[0002] Chains and sprockets are common structures in the machinery industry. The tensile coefficient of a chain determines its quality. Chains that are easily stretched are not easy to use. Therefore, before leaving the factory, chains must undergo sampling tensile testing to test their strength. However, most existing tensile testing equipment has a relatively simple overall structure and function. During stretching, it can only test the magnitude of the tensile force and cannot directly determine the magnitude of the elongation. Therefore, there is a need for a testing device that can simultaneously test both tensile force and elongation.

[0003] To address the aforementioned issues, a search revealed a chain tensile testing device with Chinese National Patent Publication No. CN202021766977.1. This device allows direct control of the slider's position and the rotating angle of the turntable via operation buttons on the control box, facilitating the testing of the chain's tensile strength at different locations. It also features a scale plate, allowing direct reading of the chain's displacement during testing, facilitating further testing and making the testing more comprehensive. However, some problems remain in practical use. The chain may break during stretching, and the fragments can fly out, causing injury to the operator. While existing technologies place the chain in a closed space for testing to address the issue of fragment injury, the enclosed space makes it difficult to observe the chain's tensile strength and condition. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a chain tensile strength testing device, which protects the operator through a protective box and a protective door to prevent the chain from breaking and causing fragments to fly out. The testing components perform tensile tests on the chain. The setting of the measuring components will not affect the operator's knowledge of the chain's tensile coefficient. Moreover, the transparent protective door allows the operator to easily observe the condition of the chain, avoiding the occurrence of overstretching that affects the degree of measurement.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0006] A chain tensile strength testing device includes: a base, two pairs of support feet fixedly installed at the bottom of the base, a back plate fixedly connected to the top of the base, a protective box fixedly installed on the front side of the back plate, and a protective door provided on the protective box;

[0007] A measuring component, which is disposed on the back plate, is used to facilitate observation of the tensile strength of the chain. The measuring component includes: a slide, a moving block, a connecting rod, a pointer, and scale lines.

[0008] The test assembly, located inside the protective box, is used to test the chain. The test assembly includes: a fixed plate, a spring buckle a, a moving rod, a spring buckle b, and a screw.

[0009] Furthermore, a sliding groove is provided on the back plate, and a moving block is provided inside the sliding groove. A connecting rod is fixedly connected to the back of the moving block. The connecting rod is L-shaped and a pointer is fixedly connected to the top of the connecting rod. A scale line is provided on the front side of the protective box near the top.

[0010] Furthermore, a fixing plate is fixedly connected to the front side of the back plate, and a spring buckle a is provided on one side of the fixing plate. A moving rod is fixedly connected to the front side of the moving block, and a spring buckle b is fixedly connected to one side of the fixing plate. A screw is rotatably connected between the inner walls of opposite ends of the slide groove, and the moving block is threaded to the outside of the screw.

[0011] Furthermore, limiting grooves are respectively formed at the top and bottom of the sliding groove, and limiting blocks are respectively fixedly connected to the top and bottom of the moving block, with the limiting blocks located inside the sliding groove.

[0012] Furthermore, the back plate has a movable cavity, one end of the screw extends into the movable cavity and is fixedly connected to a bevel gear a, and a speed reducer a is fixedly installed on the back side of the back plate near the movable cavity.

[0013] Furthermore, one end of the drive shaft of the reducer a extends into the movable cavity and is fixedly connected to a bevel gear b, which meshes with the bevel gear a.

[0014] Furthermore, a mounting platform is fixedly connected to one side of the fixed plate, and a reducer b is fixedly installed on the top of the mounting platform. One end of the drive shaft of the reducer b passes through the fixed plate and is connected to one end of the spring buckle a.

[0015] The beneficial effects of this utility model are:

[0016] The advantages of this invention are that it protects the operator by using a protective box and a protective door to prevent the chain from breaking and causing fragments to fly out. The test components are used to perform tensile tests on the chain. The setting of the measuring components does not affect the operator's knowledge of the chain's tensile coefficient. Furthermore, the transparent protective door allows the operator to easily observe the condition of the chain, preventing overstretching from affecting the reading. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2This is a cross-sectional view of the overall structure of this utility model.

[0019] Figure 3 This is a cross-sectional view of the movable cavity structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the movable block structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the fixing plate structure of this utility model.

[0022] Figure 6 This is a schematic diagram of the backplate structure of this utility model.

[0023] Figure 7 For the present utility model Figure 3 Enlarged view of point A in the middle.

[0024] Figures 1-7 Components: 1. Base; 11. Support foot; 12. Back plate; 13. Protective box; 14. Protective door; 2. Slide groove; 21. Moving block; 22. Connecting rod; 23. Pointer; 24. Scale line; 25. Limit groove; 26. Limit block; 27. Movable cavity; 28. Bevel gear a; 29. ​​Reducer a; 210. Bevel gear b; 3. Fixed plate; 31. Spring buckle a; 32. Moving rod; 33. Spring buckle b; 34. Screw; 35. Mounting platform; 36. Reducer b. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] like Figures 1-7 As shown, a chain tensile strength testing device includes: a base 1, with two pairs of support feet 11 fixedly installed at the bottom of the base 1, a back plate 12 fixedly connected to the top of the base 1, a protective box 13 fixedly installed on the front side of the back plate 12, and a protective door 14 provided on the protective box 13; a measuring component, which is located on the back plate 12 for easy observation of the chain's tensile strength; and a testing component, which is located inside the protective box 13 for testing the chain.

[0029] When conducting a tensile strength test on the chain, the protective door 14 is opened, and the chain is then hung on the testing assembly. The testing assembly pulls one end of the chain to move it, thereby testing the tensile strength of the chain. The protective box 13 and the protective door 14 can prevent debris from flying out when the chain breaks, thus preventing injury to the user. Furthermore, the setting of the measuring assembly allows the chain's tensile coefficient to be determined without opening the protective door 14, improving the safety of the chain's tensile strength test. After the test is completed, the protective door 14 is opened and the chain is removed to complete the test. The protective door 14 is made of transparent tempered glass.

[0030] Example 2

[0031] Based on Embodiment 1, the test assembly includes: a fixed plate 3, a spring buckle a31, a moving rod 32, a spring buckle b33, and a screw 34. The fixed plate 3 is fixedly connected to the front side of the back plate 12. A spring buckle a31 is provided on one side of the fixed plate 3. The moving rod 32 is fixedly connected to the front side of the moving block 21. A spring buckle b33 is fixedly connected to one side of the fixed plate 3. A screw 34 is rotatably connected between the inner walls of opposite ends of the slide groove 2. The moving block 21 is threaded to the outside of the screw 34. A movable cavity 27 is provided on the back plate 12. One end of 34 extends into the movable cavity 27 and is fixedly connected to a bevel gear a28. A reducer a29 is fixedly installed on the back side of the back plate 12 near the movable cavity 27. One end of the drive shaft of the reducer a29 extends into the movable cavity 27 and is fixedly connected to a bevel gear b210. The bevel gear b210 meshes with the bevel gear a28. A mounting platform 35 is fixedly connected to one side of the fixed plate 3. A reducer b36 is fixedly installed on the top of the mounting platform 35. One end of the drive shaft of the reducer b36 passes through the fixed plate 3 and is connected to one end of the spring buckle a31.

[0032] When testing the tensile strength of the chain, both ends of the chain are attached to spring buckles a31 and b33 respectively. Spring buckles a31 and b33 prevent the chain from falling off when stretched. Then, the reducer a29 is started through the control panel on the base 1, which drives the bevel gear b210 to rotate. When the bevel gear b210 rotates, it meshes with the bevel gear a28, which in turn drives the screw 34 to rotate. When the screw 34 rotates, it engages with the moving block 21, which in turn drives the moving block 21 to move inside the slide groove 2. The moving block 21 drives the moving rod 32 and the spring buckle b33 to move to the right to stretch the chain, thus performing the tensile strength test. After the test is completed, the reducer a29 is controlled to rotate in the opposite direction, so that the moving block 21 moves to the left to the initial position, so that the chain can be tested again. At the same time, this device can also perform a torsional strength test on the chain to improve its performance. The reducer b36 is started, which drives the spring buckle a31 to rotate. The rotation of the spring buckle a31 causes the chain to twist, thus performing a torsional strength test.

[0033] Example 3

[0034] Based on Embodiment 2, the measuring component includes: a slide 2, a moving block 21, a connecting rod 22, a pointer 23, and a scale line 24. The slide 2 is provided on the back plate 12, and the moving block 21 is provided inside the slide 2. The connecting rod 22 is fixedly connected to the back side of the moving block 21. The connecting rod 22 is arranged in an L-shape. The pointer 23 is fixedly connected to the top of the connecting rod 22. The scale line 24 is provided near the top of the front side of the protective box 13. Limiting grooves 25 are respectively provided at the top and bottom of the slide 2. Limiting blocks 26 are fixedly connected to the top and bottom of the moving block 21. The limiting blocks 26 are located inside the slide 2.

[0035] When the moving block 21 moves, it will drive the limiting block 26 to move along the inside of the slide groove 2, thereby restricting the moving block 21 and preventing the moving block 21 from falling out of the slide groove 2. When the moving block 21 moves, it will drive the connecting rod 22 to move together. When the connecting rod 22 moves, it will drive the pointer 23 to move. The pointer 23 moves along the scale line 24, thereby allowing the tensile strength coefficient of the chain to be determined.

[0036] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0037] The above provides a detailed description of a chain tensile strength testing device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A chain tensile strength testing device, characterized in that, include: The base (1) has two pairs of support feet (11) fixedly installed at the bottom. The base (1) has a back plate (12) fixedly connected to the top. The back plate (12) has a protective box (13) fixedly installed on the front side. The protective box (13) has a protective door (14). The measuring component is located on the back plate (12) to facilitate observation of the tensile strength of the chain. The measuring component includes: a slide (2), a moving block (21), a connecting rod (22), a pointer (23), and a scale line (24). The test assembly, located inside the protective box (13), is used to test the chain. The test assembly includes: a fixed plate (3), a spring buckle a (31), a moving rod (32), a spring buckle b (33), and a screw (34).

2. The chain tensile strength testing device according to claim 1, characterized in that, The back plate (12) is provided with a sliding groove (2), and a moving block (21) is provided inside the sliding groove (2). A connecting rod (22) is fixedly connected to the back of the moving block (21). The connecting rod (22) is arranged in an L-shape. A pointer (23) is fixedly connected to the top of the connecting rod (22). A scale line (24) is provided on the front side of the protective box (13) near the top.

3. The chain tensile strength testing device according to claim 1, characterized in that, A fixing plate (3) is fixedly connected to the front side of the back plate (12). A spring buckle a (31) is provided on one side of the fixing plate (3). A moving rod (32) is fixedly connected to the front side of the moving block (21). A spring buckle b (33) is fixedly connected to one side of the fixing plate (3) of the moving rod (32). A screw (34) is rotatably connected between the inner walls of opposite ends of the slide groove (2). The moving block (21) is threaded to the outside of the screw (34).

4. The chain tensile strength testing device according to claim 1, characterized in that, Limiting grooves (25) are respectively provided at the top and bottom of the sliding groove (2), and limiting blocks (26) are respectively fixedly connected at the top and bottom of the moving block (21). The limiting blocks (26) are respectively located inside the sliding groove (2).

5. The chain tensile strength testing device according to claim 1, characterized in that, The back plate (12) has a movable cavity (27), one end of the screw (34) extends into the movable cavity (27) and is fixedly connected to a bevel gear a (28), and a reducer a (29) is fixedly installed on the back side of the back plate (12) near the movable cavity (27).

6. The chain tensile strength testing device according to claim 5, characterized in that, One end of the drive shaft of the reducer a (29) extends to the movable cavity (27) and is fixedly connected to a bevel gear b (210), which meshes with the bevel gear a (28).

7. The chain tensile strength testing device according to claim 1, characterized in that, A mounting platform (35) is fixedly connected to one side of the fixed plate (3), and a reducer b (36) is fixedly installed on the top of the mounting platform (35). One end of the drive shaft of the reducer b (36) passes through the fixed plate (3) and is connected to one end of the spring buckle a (31).

Images