Chain tension detection device

Abstract

The utility model relates to a chain tension detection device, which comprises a detection table and a protective cover placed at the top of the detection table, a sliding groove located in the protective cover is formed in the top of the detection table, a cross rod is arranged in the sliding groove, one end of the cross rod is rotatably connected with the inner side wall of the sliding groove, and the other end of the cross rod penetrates out of the detection table. A rack is fixedly connected to the inner side wall of the protective cover and extends downwards into the sliding groove in the vertical direction, a magnetic rotating wheel meshed with the rack is rotationally arranged on the outer side wall of the transverse rod, two sections of threads are formed in the outer side wall of the transverse rod, the thread screwing directions of the two threads are opposite, and the two sections of threads are distributed in the length direction of the transverse rod. A sliding block arranged on the thread in a sleeving mode is arranged in the sliding groove, a movable rod fixedly connected with the top of the sliding block is arranged in the protective cover, the movable rod is provided with a fixing assembly, a limiting rod is fixedly connected to the bottom of the protective cover, and the limiting rod downwards extends into the detection table in the vertical direction. The chain tension detection device has the beneficial effect that a worker can carry out tension detection on chains with different lengths.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically to a chain tension testing device. Background Technology

[0002] While the previous chain tension testing device could test different batches of imported products to understand product performance and ensure safe production, its simple structure meant that the chain would break when subjected to a certain tension. The broken chain fragments would then fly outwards, potentially injuring workers.

[0003] To address these technical challenges, the existing technology provides the CN221898918U chain tension testing device. By incorporating a protective cover, it prevents chain fragments from flying out and injuring workers when the chain breaks under a certain tensile force, thus increasing the device's protective capabilities. A closed door facilitates chain removal, and graduated lines on the testing platform allow workers to clearly see the chain's tensile strength. A heating rod heats the chain's outer surface, enabling testing of the tensile strength it withstands at different temperatures. An adjustment mechanism allows for the movement of a ball screw via a ball sleeve, which in turn moves a fixed component. This allows the fixed component to be positioned appropriately according to different chain lengths, making the device more convenient to use.

[0004] However, there may be some technical problems during its use. For example, when using the device, the operator needs to control the adjustment mechanism and the closing door separately to open the closing door, put the chain into the protective cover, hang the chain on the hook, and pull the chain by moving the two moving rods in opposite directions through the adjustment mechanism. This may make the operation of the device more complicated for the operator and make it inconvenient for the operator to test the tension of chains of different lengths. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a chain tension testing device that enables workers to perform tension testing on chains of different lengths.

[0006] This utility model is achieved through the following technical solution: a chain tension testing device is provided, including a testing platform and a protective cover placed on top of the testing platform. A groove is formed on the top of the testing platform within the protective cover. A crossbar is installed within the groove, with one end rotatably connected to the inner wall of the groove and the other end extending out to the outside of the testing platform. A rack is fixedly connected to the inner wall of the protective cover, extending vertically downwards into the groove. A magnetic wheel, meshing with the rack, is rotatably installed on the outer wall of the crossbar. Two threads are formed on the outer wall of the crossbar, with opposite thread directions distributed along the length of the crossbar. A slider is fitted onto the threads within the groove. A movable rod is fixedly connected to the top of the slider within the protective cover, and the movable rod has a fixing component. A limiting rod is fixedly connected to the bottom of the protective cover, extending vertically downwards into the testing platform.

[0007] In use, this utility model involves setting up a testing platform and a protective cover placed on top of the testing platform. The top of the testing platform has a groove located within the protective cover. A crossbar is installed within the groove, with one end rotatably connected to the inner wall of the groove and the other end extending to the outside of the testing platform. A rack is fixed to the inner wall of the protective cover, extending vertically downwards into the groove. A magnetic wheel, meshing with the rack, is rotatably mounted on the outer wall of the crossbar. Two threads are formed on the outer wall of the crossbar, with opposite threads pointing in opposite directions and distributed along the length of the crossbar. A slider is fitted onto the threads within the groove. A movable rod, fixed to the top of the slider, is located within the protective cover, and the movable rod is equipped with a fixing component. The bottom of the protective cover is fixed with a limiting rod, which extends vertically downwards into the testing platform. During use, rotating the crossbar forward causes the threaded rod and magnetic wheel to rotate within the groove. This drives the magnetic wheel to move its meshing rack upwards, causing the rack to move the protective cover upwards as well, disengaging it from the top of the testing platform. The bottom of the protective cover then moves to a position above the moving rod, allowing the limiting rod to move upwards along with the protective cover within the testing platform, ensuring the stability of the protective cover during movement. During the rotation of the crossbar, the threaded rod also rotates. However, because the slider is limited by the groove, it does not rotate within the groove with the threaded rod, but rather moves under the rotational drive of the threaded rod. Because the two threads have opposite directions of rotation, the two sliders will also move closer to each other under the rotational drive of the two threads. When the limit rod moves to the uppermost position in the testing table, it can no longer move upwards. At this time, because the operator is still driving the crossbar to rotate, the protective cover is relatively fixed to the testing table, and the rack can no longer move upwards under the drive of the magnetic wheel. At this time, the crossbar will overcome the attraction and fixation between itself and the magnetic wheel and rotate in the magnetic wheel, so that the threads continue to rotate with the crossbar, and continue to bring the two sliders closer to each other in the groove. This makes it convenient for the operator to fix the two ends of the chain to the two moving rods respectively through the fixing components. After the operator fixes the two ends of the chain to the two moving rods respectively, by rotating the crossbar in the opposite direction, the threads and the magnetic wheel will move closer to each other. The rotating wheel rotates within the groove along with the crossbar, causing the magnetic wheel to drive the meshing rack downwards. This, in turn, moves the rack downwards, bringing the protective cover back into contact with the top of the testing platform. The limiting rod then moves downwards along with the protective cover within the testing platform, ensuring the stability of the protective cover during movement. As the crossbar rotates, the threaded section also rotates. However, because the slider is limited by the groove, it does not rotate within the groove but moves under the rotational drive of the thread. Since the two threaded sections have opposite directions of rotation, the two sliders also move away from each other under the rotational drive of their respective threaded sections, thus stretching the chain. Once the bottom of the protective cover contacts the top of the testing platform, the crossbar continues to rotate in the opposite direction.At this point, because the protective cover and the testing platform are relatively fixed, the rack can no longer move downwards under the drive of the magnetic wheel. The crossbar then overcomes the attraction and fixation with the magnetic wheel and rotates within it. This causes the thread to continue rotating with the crossbar, further distancing the two sliders within the groove and continuing to stretch the chain. This allows for the testing of the chain's tensile strength, enabling workers to perform tensile tests on chains of different lengths.

[0008] Preferably, two magnetic wheels are provided on the crossbar, and the two threads are located between the two magnetic wheels. By providing two magnetic wheels on the crossbar and the two threads being located between the two magnetic wheels, the stability of the protective cover's movement during use can be improved.

[0009] Preferably, the two racks are fixedly connected to the left and right inner sidewalls of the protective cover, respectively. By fixing the two racks to the left and right inner sidewalls of the protective cover, the stability of the protective cover's movement during use can be improved.

[0010] Preferably, a rotating handle is fixedly connected to the end of the crossbar located on the outer side of the testing platform. By fixing a rotating handle to the end of the crossbar located on the outer side of the testing platform, the operator can easily drive the crossbar to rotate using the rotating handle.

[0011] Preferably, the two fixing components are symmetrically arranged. Each fixing component includes a hook fixed to the upper end of the moving rod, and a stop bar is hinged to one end of the hook. The inner side of the stop bar is obliquely connected to the hook by a spring. In use, one end of the chain can be hooked onto the hook, and the stop bar will prevent it from falling. The spring allows the stop bar to return to its original position, making disassembly and installation of the chain more convenient.

[0012] Preferably, the protective cover is provided with an observation window at the top. By providing an observation window at the top of the protective cover, the situation inside the protective cover can be observed.

[0013] Preferably, the top of the testing platform has a fixing groove that matches the bottom of the protective cover, and the bottom of the protective cover abuts against the bottom of the fixing groove. By having a fixing groove on the top of the testing platform that matches the bottom of the protective cover, and the bottom of the protective cover abutting against the bottom of the fixing groove, the stability of the protective cover on the top of the testing platform during use can be improved.

[0014] Preferably, the front sidewall of the testing platform has evenly distributed graduation lines. By evenly distributing graduation lines on the front sidewall of the testing platform, the operator can clearly see the length of the chain that can withstand tension.

[0015] Preferably, a heating rod is provided on the side of the moving rod away from the scale line, and is fixedly connected to the inner wall of the protective cover. By providing a heating rod on the side of the moving rod away from the scale line and fixedly connected to the inner wall of the protective cover, the temperature inside the protective cover can be adjusted, making it convenient for workers to test the tension of the chain at different temperatures.

[0016] The beneficial effects of this utility model are as follows: By setting up a testing platform and a protective cover placed on top of the testing platform, a sliding groove is opened on the top of the testing platform and located inside the protective cover. A crossbar is set in the sliding groove, one end of which is rotatably connected to the inner side wall of the sliding groove, and the other end of which extends to the outside of the testing platform. A rack is fixedly connected to the inner side wall of the protective cover, and the rack extends vertically downward into the sliding groove. A magnetic wheel that meshes with the rack is rotatably set on the outer side wall of the crossbar. Two threads are opened on the outer side wall of the crossbar, and the threads of the two threads have opposite directions and are distributed along the length of the crossbar. A slider is set in the sliding groove and sleeved on the threads. A movable rod is fixedly connected to the top of the slider inside the protective cover, and the movable rod is equipped with a fixing component. The bottom of the protective cover is fixed with a limiting rod, which extends vertically downwards into the testing platform. During use, rotating the crossbar forward causes the threaded rod and magnetic wheel to rotate within the groove. This drives the magnetic wheel to move its meshing rack upwards, causing the rack to move the protective cover upwards as well, disengaging it from the top of the testing platform. The bottom of the protective cover then moves to a position above the moving rod, allowing the limiting rod to move upwards along with the protective cover within the testing platform, ensuring the stability of the protective cover during movement. During the rotation of the crossbar, the threaded rod also rotates. However, because the slider is limited by the groove, it does not rotate within the groove with the threaded rod, but rather moves under the rotational drive of the threaded rod. Because the two threads have opposite directions of rotation, the two sliders will also move closer to each other under the rotational drive of the two threads. When the limit rod moves to the uppermost position in the testing table, it can no longer move upwards. At this time, because the operator is still driving the crossbar to rotate, the protective cover is relatively fixed to the testing table, and the rack can no longer move upwards under the drive of the magnetic wheel. At this time, the crossbar will overcome the attraction and fixation between itself and the magnetic wheel and rotate in the magnetic wheel, so that the threads continue to rotate with the crossbar, and continue to bring the two sliders closer to each other in the groove. This makes it convenient for the operator to fix the two ends of the chain to the two moving rods respectively through the fixing components. After the operator fixes the two ends of the chain to the two moving rods respectively, by rotating the crossbar in the opposite direction, the threads and the magnetic wheel will move closer to each other. The rotating wheel rotates within the groove along with the crossbar, causing the magnetic wheel to drive the meshing rack downwards. This, in turn, moves the rack downwards, bringing the protective cover back into contact with the top of the testing platform. The limiting rod then moves downwards along with the protective cover within the testing platform, ensuring the stability of the protective cover during movement. As the crossbar rotates, the threaded section also rotates. However, because the slider is limited by the groove, it does not rotate within the groove but moves under the rotational drive of the thread. Since the two threaded sections have opposite directions of rotation, the two sliders also move away from each other under the rotational drive of their respective threaded sections, thus stretching the chain. Once the bottom of the protective cover contacts the top of the testing platform, the crossbar continues to rotate in the opposite direction.At this point, because the protective cover and the testing platform are relatively fixed, the rack can no longer move downwards under the drive of the magnetic wheel. The crossbar then overcomes the attraction and fixation with the magnetic wheel and rotates within it. This causes the thread to continue rotating with the crossbar, further distancing the two sliders within the groove and continuing to stretch the chain. This allows for the testing of the chain's tensile strength, enabling workers to perform tensile tests on chains of different lengths. Attached Figure Description

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

[0018] Figure 2 This is a perspective view of the structure of this utility model;

[0019] Figure 3 This is a top view of the structure of this utility model;

[0020] Figure 4 for Figure 2 Schematic diagram of part A in the middle;

[0021] Figure 5 for Figure 2 Perspective view of section B;

[0022] As shown in the figure:

[0023] 1. Protective cover, 2. Testing table, 3. Scale line, 4. Crossbar, 5. Rotating handle, 6. Fixing groove, 7. Limiting rod, 8. Thread, 9. Heating rod, 10. Moving rod, 11. Rack, 12. Slider, 13. Magnetic wheel, 14. Observation window, 15. Hook, 16. Stop bar, 17. Spring, 18. Slide groove. Detailed Implementation

[0024] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0025] like Figures 1-5The chain tension testing device of this utility model includes a testing platform 2 and a protective cover 1 placed on top of the testing platform 2. A groove 18 is formed on the top of the testing platform 2 within the protective cover 1. A crossbar 4 is disposed within the groove 18. One end of the crossbar 4 is rotatably connected to the inner wall of the groove 18, and the other end of the crossbar 4 extends to the outside of the testing platform 2. A rack 11 is fixed to the inner wall of the protective cover 1, extending vertically downwards into the groove 18. The outer wall of the crossbar 4 is rotatably connected to the crossbar 1. A magnetic wheel 13 is provided to mesh with the rack 11. Two threads 8 are provided on the outer wall of the crossbar 4. The threads 8 have opposite directions of rotation and are distributed along the length of the crossbar 4. A slider 12 is provided in the groove 18 and sleeved on the thread 8. A moving rod 10 is provided in the protective cover 1 and fixed to the top of the slider 12. The moving rod 10 is provided with a fixing component. A limit rod 7 is fixed to the bottom of the protective cover 1 and extends vertically downward into the detection table 2.

[0026] By installing two magnetic wheels on the crossbar 4, with two threads 8 positioned between them, the stability of the protective cover 1 during operation is improved. The stability of the protective cover 1 during operation is further enhanced by fixing two racks 11 to the left and right inner walls of the protective cover 1. A rotating handle 5 is fixed to the end of the crossbar 4 located outside the testing platform 2, allowing operators to easily rotate the crossbar 4. Two fixed components are symmetrically arranged, each including a hook 15 fixed to the upper end of the moving rod 10. One end of the hook 15 is hinged to a stop bar 16, with the inside of the stop bar 16 obliquely connected to the hook 15 via a spring 17. During operation, one end of the chain can be hooked onto the hook 15, and the stop bar 16 prevents it from falling. The spring 17 allows the stop bar 16 to reset, facilitating chain disassembly and installation. An observation window 14 is provided at the top of the protective cover 1, allowing observation of the interior of the protective cover 1. A fixing groove 6, adapted to the bottom of the protective cover 1, is provided on the top of the testing platform 2, with the bottom of the protective cover 1 abutting against the bottom of the fixing groove 6. This improves the stability of the protective cover 1 on the top of the testing platform 2 during use. Scale lines 3 are evenly distributed on the front sidewall of the testing platform 2, allowing operators to clearly see the length of the chain under tension. A heating rod 9, fixed to the inner wall of the protective cover 1, is located on the side of the moving rod 10 away from the scale lines 3. The heating rod 9 allows for temperature adjustment inside the protective cover 1, facilitating the operator's testing of the chain's tension under different temperatures. The magnetic wheel 13 is a gear made of magnetic material.

[0027] Combined with appendix Figure 1-5The method of using this utility model is as follows: First, by rotating the handle 5, the crossbar 4 is rotated in the forward direction, causing the thread 8 and the magnetic wheel 13 to rotate with the crossbar 4 in the slide groove 18. This causes the magnetic wheel 13 to drive the rack 11, which meshes with it, to move upward. This causes the rack 11 to move the protective cover 1 upward as well, disengaging it from the fixing groove 6 at the top of the testing table 2. The bottom of the protective cover 1 then moves to the position above the moving rod 10, causing the limiting rod 7 to move upward with the protective cover 1 in the testing table 2, ensuring the stability of the protective cover 1 during movement. During the rotation of the crossbar 4, the thread 8 also rotates with the crossbar 4. At this time, because the slider 12 is limited by the slide groove 18, it will not move with the thread 8 in the slide groove 18. Instead of rotating, the two sliders 12 move under the rotational drive of the thread 8. Since the threads 8 of the two sections of thread 8 rotate in opposite directions, the two sliders 12 also move closer to each other under the rotational drive of the two sections of thread 8. When the limit rod 7 moves to the uppermost position in the detection table 2, it can no longer move upward. At this time, because the operator is still driving the crossbar 4 to rotate, the protective cover 1 is relatively fixed to the detection table 2, and the rack 11 can no longer move upward under the drive of the magnetic wheel 13. At this time, the crossbar 4 will overcome the attraction and fixation between itself and the magnetic wheel 13 and rotate in the magnetic wheel 13, so that the thread 8 continues to rotate with the crossbar 4, and the two sliders 12 continue to move closer to each other in the slide groove 18. Then the two ends of the chain can be hung on the two hooks 15 respectively, and then... The stop bar 16 is used to block the chain and prevent it from falling off. The spring 17 resets the stop bar 16, making the disassembly and installation of the chain easier. After fixing both ends of the chain to the two moving rods 10, the crossbar 4 is rotated in the opposite direction, causing the threaded 8 and magnetic wheel 13 to rotate within the groove 18. This drives the magnetic wheel 13 to move its meshing rack 11 downwards, causing the rack 11 to move the protective cover 1 downwards as well, until it re-contacts the bottom of the fixing groove 6 at the top of the testing platform 2. The limit rod 7 also moves downwards with the protective cover 1 within the testing platform 2, ensuring the stability of the protective cover 1 during movement. During the rotation of the crossbar 4, the threaded 8 also rotates with it. Because the slider 12 is limited by the groove 18, it will not rotate within the groove 18 along with the thread 8. Instead, it will move under the rotational drive of the thread 8. Since the threads 8 of the two sections have opposite directions of rotation, the two sliders 12 will also move away from each other under the rotational drive of the two sections of thread 8, thereby stretching the chain. When the bottom of the protective cover 1 contacts the top of the detection platform 2, the crossbar 4 is controlled to rotate in the opposite direction. At this time, because the protective cover 1 and the detection platform 2 are relatively fixed, the rack 11 can no longer move downward under the drive of the magnetic wheel 13. At this time, the crossbar 4 will overcome the attraction and fixation between itself and the magnetic wheel 13 and rotate within the magnetic wheel 13, thereby causing the thread 8 to continue to rotate with the crossbar 4, and continuing to cause the two sliders 12 to move away from each other within the groove 18.The chain is stretched further to test its tensile strength. The scale lines 3 allow workers to clearly see the length of the chain that can withstand the tensile force. The heating rod 9 allows for temperature regulation inside the protective cover 1, facilitating testing of the chain's tensile strength at different temperatures. The observation window 14 allows for observation of the interior of the protective cover 1.

[0028] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A chain tension testing device, comprising a testing platform (2) and a protective cover (1) placed on top of the testing platform, characterized in that: The top of the testing platform is provided with a sliding groove (18) located inside the protective cover. A crossbar (4) is provided in the sliding groove. One end of the crossbar is rotatably connected to the inner side wall of the sliding groove, and the other end of the crossbar extends to the outside of the testing platform. A rack (11) is fixedly connected to the inner side wall of the protective cover. The rack extends vertically downward into the sliding groove. A magnetic wheel (13) that meshes with the rack is rotatably provided on the outer side wall of the crossbar. Two threads (8) are provided on the outer side wall of the crossbar. The threads of the two threads have opposite directions and are distributed along the length of the crossbar. A slider (12) is provided in the sliding groove and fitted on the thread. A moving rod (10) is fixedly connected to the top of the slider in the protective cover. The moving rod is provided with a fixing component. A limiting rod (7) is fixedly connected to the bottom of the protective cover. The limiting rod extends vertically downward into the testing platform.

2. The chain tension detecting device according to claim 1, characterized by: Two magnetic wheels are provided on the crossbar, and the two threads are located between the two magnetic wheels.

3. The chain tension detection device according to claim 1, characterized by: The two racks are respectively fixed to the left and right inner walls of the protective cover.

4. The chain tension detection device according to claim 1, characterized by: A rotating handle (5) is fixed to the end of the crossbar located on the outside of the testing platform.

5. The chain tension detection device according to claim 4, characterized by: The two fixing components are symmetrically arranged. Each fixing component includes a hook (15) fixed to the upper end of the moving rod. One end of the hook is hinged to a stop bar (16). The inner side of the stop bar is obliquely connected to the hook by a spring (17).

6. The chain tension detection device according to claim 4, characterized by: The top of the protective cover is provided with an observation window (14).

7. The chain tension detecting device according to claim 4, characterized by: The top of the testing platform is provided with a fixing groove (6) that is adapted to the bottom of the protective cover, and the bottom of the protective cover abuts against the bottom of the fixing groove.

8. The chain tension detecting device according to claim 4, characterized by: The front side wall of the testing station has evenly distributed scale lines (3).

9. The chain tension detecting device according to claim 4, characterized by: A heating rod (9) is fixed to the inner wall of the protective cover on the side of the moving rod away from the scale line.

Images