A component fatigue testing device

Abstract

This utility model relates to the field of fitness equipment testing technology, specifically a component fatigue testing device, including a support assembly. A cylinder is installed on the top of the support assembly, and the output end of the cylinder is provided with a tensioning assembly for stretching multiple springs from the top. A guide assembly is provided inside the support assembly for pushing the tensioning assembly to rotate. By setting the tensioning assembly and the guide assembly, the tensioning assembly can simultaneously pull the tops of multiple springs, greatly improving the testing speed. During fatigue testing, the insert rod cooperates with the guide groove to push the rotating column to rotate the tops of the springs, causing the springs to twist and bend while being stretched, better replicating the complex stress conditions of the tensioner springs in actual use, enhancing the accuracy of the test. At the same time, the insert rod can drive the pulley to disengage from the guide groove, which can switch to a simple linear tension testing mode to meet different testing needs and improve the applicability and flexibility of the device.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment testing technology, and in particular to a fatigue testing device for components. Background Technology

[0002] A resistance band is a fitness device suitable for general fitness training. It usually consists of two handles and a metal spring. During repeated stretching, the spring of the resistance band will develop deformation cracks. With the increase of use, the crack gaps will increase, eventually leading to fatigue, causing serious changes in the spring stiffness or even breakage. Therefore, it is necessary to conduct fatigue testing on the spring of the resistance band.

[0003] A spring tensile testing machine disclosed in Chinese Patent Publication No. CN222913348U clamps two hanging rings at the upper and lower ends of the spring using a clamping component. Throughout the tensile test, the hanging rings at both ends of the spring are firmly clamped, increasing the stability of the spring during tension and preventing it from falling off. However, according to related technologies and existing techniques, it is difficult for users to ensure that the spring is stretched in a completely straight line during the use of a tensioner. This makes the spring prone to twisting or bending. Furthermore, this spring tensile testing machine applies tension in a straight line when performing fatigue tests on tensioner springs, which cannot simulate the stress conditions of the spring during actual use, thus affecting the accuracy of the fatigue test results. Additionally, it can only perform fatigue tests on one tensioner spring at a time, resulting in a slow overall testing speed and failing to meet the requirements for efficient testing. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a component fatigue testing device.

[0005] A component fatigue testing device includes a support assembly, a cylinder mounted on the top of the support assembly, a tensioning assembly for stretching multiple springs from the top at the output end of the cylinder, a guide assembly for rotating the tensioning assembly inside the support assembly, a fixing assembly for fixing the bottom of the multiple springs slidably mounted below the tensioning assembly on the support assembly, and an adjusting assembly for adjusting the height of the fixing assembly at the bottom of the fixing assembly.

[0006] Preferably, the support assembly includes a console, four support rods are fixedly mounted on the top of the console, a top plate is fixedly mounted on the top of the console via the four support rods, and the cylinder is fixed to the top of the top plate with its output end penetrating downward through the top plate.

[0007] Preferably, the tensioning assembly includes a lifting plate fixed to the output end of the cylinder, the lifting plate being slidably connected to the support rod, a rotating column being rotatably mounted on the bottom of the lifting plate, a guide groove being provided on the rotating column, an upper fixing seat being fixedly provided at the bottom of the rotating column, and a plurality of upper hooks being fixedly provided at the bottom of the upper fixing seat.

[0008] Preferably, the guide assembly includes a suspension fixed to the bottom of the top plate, a fixing sleeve is fixedly provided at the bottom of the suspension, a plug rod is installed in the fixing sleeve, a knob is fixedly provided at the front end of the plug rod, and a pulley is rotatably installed at the rear end of the plug rod into the guide groove.

[0009] Preferably, the fixing component includes an adjusting plate slidably mounted on the four support rods, a lower fixing seat is fixedly provided at the position corresponding to the upper fixing seat of the adjusting plate, and a lower hook is fixedly provided at the position corresponding to the multiple upper hooks of the lower fixing seat.

[0010] Preferably, the adjustment assembly includes a sleeve fixed to the bottom of the adjustment plate, a screw threaded on the sleeve, the screw being rotatably connected to the control console, a second bevel gear fixed at the bottom of the screw, a rotating shaft on one side of the second bevel gear, the rotating shaft being rotatably connected to the control console, a first bevel gear meshing with the second bevel gear fixed at one end of the rotating shaft, and a handle fixed at the end of the rotating shaft away from the first bevel gear extending to the outside of the control console.

[0011] Preferably, the multiple upper hooks are arranged in a circumferential array.

[0012] Preferably, the guide groove is spiral-shaped.

[0013] Preferably, the front section of the insertion rod is a threaded rod, the rear section is a smooth rod, and it is threadedly connected to the fixing sleeve.

[0014] Beneficial effects:

[0015] This fatigue testing device for components, by setting up a tension component and a guide component, allows the tension component to simultaneously pull the tops of multiple springs for fatigue testing, greatly improving the testing speed. During fatigue testing, the insert rod and guide groove work together to push the rotating column, causing the tops of the springs to rotate, so that the springs twist and bend while being stretched. This better reflects the complex stress conditions of the tension springs in actual use, enhancing the accuracy of the test. At the same time, the insert rod can drive the pulley to disengage from the guide groove, which can switch to a simple linear tension test mode to meet different testing needs and improve the applicability and flexibility of the device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0018] Figure 2 This is a schematic diagram of the first state of the rotating column of this utility model;

[0019] Figure 3 This utility model Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0020] Figure 4 This is a schematic diagram of the structure of the tensioning component of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the guide component of this utility model;

[0022] Figure 6 This is a schematic diagram of the second state of the rotating column of this utility model;

[0023] Figure 7 This utility model Figure 6 A magnified schematic diagram of the structure at point B in the middle.

[0024] In the diagram: 1. Support assembly; 11. Control console; 12. Support rod; 13. Top plate; 2. Cylinder; 3. Tension assembly; 31. Lifting plate; 32. Rotating column; 33. Guide groove; 34. Upper fixed seat; 35. Upper hook; 4. Guide assembly; 41. Suspension; 42. Fixed sleeve; 43. Insert rod; 44. Knob; 45. Pulley; 5. Fixed assembly; 51. Adjusting plate; 52. Lower fixed seat; 53. Lower hook; 6. Adjusting assembly; 61. Rotating shaft; 62. Rotating handle; 63. First bevel gear; 64. Second bevel gear; 65. Screw; 66. Sleeve. Detailed Implementation

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0027] like Figures 1 to 7 As shown, a component fatigue testing device includes a support assembly 1, a cylinder 2 fixedly mounted on the top of the support assembly 1, a tensioning assembly 3 for stretching multiple springs from the top at the bottom of the cylinder 2, a guide assembly 4 for pushing the tensioning assembly 3 to rotate on the support assembly 1, and a fixing assembly 5 for fixing the bottom of multiple springs slidably mounted below the tensioning assembly 3 on the support assembly 1. An adjusting assembly 6 for adjusting the height of the fixing assembly 5 is located at the bottom of the fixing assembly 1. In use, the distance between the fixing assembly 5 and the tensioning assembly 3 is first adjusted by the adjusting assembly 6 to match the springs to be tested. Then, the two ends of multiple springs are sequentially hung on the fixing assembly 5 and the tensioning assembly 3 respectively. The support assembly 1 supports the cylinder 2 to shorten, and the tensioning assembly 3 drives the top of the springs to move upward, simultaneously stretching the multiple springs. During this process, the guide assembly 4 pushes the tensioning assembly 3 to rotate, thereby causing the top of the springs to rotate around the axis of the cylinder 2, causing the springs to twist and bend, better simulating the actual use of tension springs and improving the accuracy of the test.

[0028] like Figure 2 As shown, the support assembly 1 includes a control console 11, four support rods 12 are fixedly mounted on the top of the control console 11, and a top plate 13 is fixedly mounted on the top of the control console 11 via the four support rods 12. The cylinder 2 is fixed to the top of the top plate 13 and its output end extends downward through the top plate 13. The control console 11 supports the top plate 13 via the support rods 12, so that the top plate 13 supports the extension and retraction of the cylinder 2.

[0029] like Figures 1 to 3As shown, the tensioning assembly 3 includes a lifting plate 31 fixed to the output end of the cylinder 2. The lifting plate 31 is slidably connected to the support rod 12. A rotating column 32 is rotatably mounted on the bottom of the lifting plate 31. A guide groove 33 is provided on the rotating column 32. An upper fixing seat 34 is fixedly provided on the bottom of the rotating column 32. Multiple upper hooks 35 are fixedly provided on the bottom of the upper fixing seat 34. The multiple upper hooks 35 are arranged in a circumferential array. The guide groove 33 is spiral in direction. The tops of multiple springs are hung on the upper hooks 35 in sequence, and the bottoms are fixed to the fixing assembly 5. Then the top plate 13 supports the air... The cylinder 2 shortens, thereby driving the upper fixed seat 34 at the bottom of the rotating column 32 to move upward along the support rod 12 via the lifting plate 31. At the same time, tensile fatigue tests are performed on multiple springs, greatly improving the test speed and efficiency. During this process, the guide assembly 4, in cooperation with the guide groove 33, pushes the rotating column 32 to drive the upper fixed seat 34 to rotate around its axis. The upper fixed seat 34 then pulls the top of the spring to rotate around its axis via the upper hook 35, causing the spring to twist and bend while being stretched, better simulating the scenario when the tensioner spring is in use, and improving the accuracy of the test.

[0030] like Figures 2 to 5 As shown, the guide assembly 4 includes a suspension 41 fixed to the bottom of the top plate 13. A fixing sleeve 42 is fixedly provided at the bottom of the suspension 41. An insert rod 43 is installed inside the fixing sleeve 42. A knob 44 is fixedly provided at the front end of the insert rod 43. The rear end of the insert rod 43 extends into the guide groove 33 and is rotatably mounted with a pulley 45. The front section of the insert rod 43 is a threaded rod, and the rear section is a smooth rod, and it is threadedly connected to the fixing sleeve 42. During the spring tensioning process, the pulley 45 at the rear end of the insert rod 43 inserts into the guide groove 33 and rolls along its interior, thereby pushing the rotating column 32 to drive the upper fixed seat 34 to rotate around its axis. The fixed seat 34 pulls the top of the spring around its axis by the upper hook 35, so that the spring twists and bends while being stretched, which better simulates the situation when the tensioner spring is in use and improves the accuracy of the test. When a linear tension test is required, the insert rod 43 is turned by the knob 44, and its threaded section is unscrewed out of the fixed sleeve 42. Then the insert rod 43 can be pulled forward to drive the pulley 45 away from the guide groove 33, and the test state can be quickly switched. At this time, the rotating column 32 will not rotate when stretched, so the spring is stretched linearly, which improves the applicability and flexibility of the device.

[0031] like Figure 1 As shown, the fixing component 5 includes an adjusting plate 51 that is slidably mounted on four support rods 12. A lower fixing seat 52 is fixedly provided at the position corresponding to the upper fixing seat 34. A lower hook 53 is fixedly provided at the position corresponding to the lower fixing seat 52 and multiple upper hooks 35. The adjusting plate 51 drives the lower fixing seat 52 to move up and down, which can adjust the distance between the upper hooks 35 and the lower hooks 53, thereby accommodating springs of different lengths. In use, the bottom of the spring is hung on the lower hook 53 for fixing.

[0032] like Figure 1 As shown, the adjustment assembly 6 includes a sleeve 66 fixed to the bottom of the adjustment plate 51. A screw 65 is threaded onto the sleeve 66 and rotatably connected to the control console 11. A second bevel gear 64 is fixed to the bottom of the screw 65. A rotating shaft 61 is provided on one side of the second bevel gear 64 and rotatably connected to the control console 11. A first bevel gear 63 that meshes with the second bevel gear 64 is fixed to one end of the rotating shaft 61. The end of the rotating shaft 61 away from the first bevel gear 63 extends to the outside of the control console 11 and is fixedly provided with a handle 62. In use, the rotating shaft 61 is first rotated by the handle 62, which drives the first bevel gear 63 to rotate. This causes the first bevel gear 63 to mesh with the second bevel gear 64, which in turn drives the screw 65 to rotate. This, in turn, pushes the adjustment plate 51 through the sleeve 66, causing the lower fixed seat 52 to move up and down. The distance between the upper fixed seat 34 and the lower fixed seat 52 is adjusted according to the length of the spring to be measured, so as to better accommodate springs of different lengths.

[0033] The work process is as follows:

[0034] S1: As Figure 1 As shown, in use, first rotate the shaft 61 by rotating the handle 62 and drive the first bevel gear 63 to rotate, so that the first bevel gear 63 meshes with the second bevel gear 64 and drives the screw 65 to rotate, thereby pushing the adjusting plate 51 through the sleeve 66 to drive the lower fixed seat 52 to move up and down. Adjust the distance between the upper fixed seat 34 and the lower fixed seat 52 according to the length of the spring to be measured, so that the two ends of the spring can be just hung on the corresponding upper hook 35 and lower hook 53;

[0035] S2: As Figure 1 As shown, the two ends of multiple springs are then hung on the corresponding upper hook 35 and lower hook 53 in sequence.

[0036] S3: As Figure 1 As shown, the top plate 13 then supports the cylinder 2 to shorten, thereby driving the upper fixed seat 34 at the bottom of the rotating column 32 to move upward along the support rod 12 through the lifting plate 31, thus stretching the spring.

[0037] S4: As Figure 3 and Figure 7 As shown, during the stretching process, the pulley 45 at the rear end of the insert rod 43 is inserted into the guide groove 33, which pushes the rotating column 32 to drive the upper fixed seat 34 to rotate around its axis.

[0038] S5: As Figure 7 As shown, the upper fixed seat 34 pulls the top of the spring around its axis by the upper hook 35, so that the spring twists and bends while being stretched, which better simulates the situation when the tensioner spring is in use and improves the accuracy of the test.

[0039] S6: As Figures 3 to 5 As shown, when a linear tensile test is required, the insert rod 43 is rotated by the knob 44, and its threaded section is unscrewed from the fixing sleeve 42. Then, the insert rod 43 can be pulled forward to drive the pulley 45 away from the guide groove 33, switching the test state so that the rotating column 32 will not rotate during the stretching process, thus performing linear tensile test.

[0040] The cylinder 2 in this application is a well-known technology in this field, therefore its specific structure and working principle are not described in detail.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A fatigue testing device for components, characterized in that: The device includes a support assembly (1), a cylinder (2) is mounted on the top of the support assembly (1), a tensioning assembly (3) for stretching multiple springs from the top is provided at the output end of the cylinder (2), a guide assembly (4) for pushing the tensioning assembly (3) to rotate is provided inside the support assembly (1), a fixing assembly (5) for fixing the bottom of multiple springs is slidably mounted on the support assembly (1) below the tensioning assembly (3), and an adjusting assembly (6) for adjusting the height of the fixing assembly (5) is provided at the bottom of the fixing assembly (5).

2. The fatigue testing device for components according to claim 1, characterized in that: The support assembly (1) includes a console (11), four support rods (12) are fixedly provided on the top of the console (11), and a top plate (13) is fixedly provided above the console (11) by the four support rods (12). The cylinder (2) is fixed to the top of the top plate (13) and its output end passes through the top plate (13) downward.

3. The fatigue testing device for components according to claim 2, characterized in that: The stretching assembly (3) includes a lifting plate (31) fixed to the output end of the cylinder (2). The lifting plate (31) is slidably connected to the support rod (12). A rotating column (32) is rotatably installed at the bottom of the lifting plate (31). A guide groove (33) is provided on the rotating column (32). An upper fixing seat (34) is fixedly provided at the bottom of the rotating column (32). A plurality of upper hooks (35) are fixedly provided at the bottom of the upper fixing seat (34).

4. The fatigue testing device for components according to claim 3, characterized in that: The guide assembly (4) includes a suspension (41) fixed to the bottom of the top plate (13). A fixing sleeve (42) is fixedly provided at the bottom of the suspension (41). A plug rod (43) is installed in the fixing sleeve (42). A knob (44) is fixedly provided at the front end of the plug rod (43). The rear end of the plug rod (43) extends into the guide groove (33) and is rotatably mounted with a pulley (45).

5. The component fatigue testing device according to claim 4, characterized in that: The fixing component (5) includes an adjusting plate (51) that is slidably mounted on the four support rods (12). The adjusting plate (51) is fixedly provided with a lower fixing seat (52) at a position corresponding to the upper fixing seat (34). The lower fixing seat (52) is fixedly provided with a lower hook (53) at a position corresponding to a plurality of upper hooks (35).

6. The component fatigue testing device according to claim 5, characterized in that: The adjustment assembly (6) includes a sleeve (66) fixed to the bottom of the adjustment plate (51). A screw (65) is threaded onto the sleeve (66). The screw (65) is rotatably connected to the control console (11). A second bevel gear (64) is fixedly provided at the bottom of the screw (65). A rotating shaft (61) is provided on one side of the second bevel gear (64). The rotating shaft (61) is rotatably connected to the control console (11). A first bevel gear (63) that meshes with the second bevel gear (64) is fixedly provided at one end of the rotating shaft (61). The end of the rotating shaft (61) away from the first bevel gear (63) extends to the outside of the control console (11) and is fixedly provided with a handle (62).

7. The fatigue testing device for components according to claim 3, characterized in that: The multiple upper hooks (35) are arranged in a circular array.

8. The fatigue testing device for components according to claim 3, characterized in that: The guide groove (33) is spiral-shaped.

9. The fatigue testing device for components according to claim 4, characterized in that: The front section of the insertion rod (43) is a threaded rod, and the rear section is a smooth rod, and it is threadedly connected to the fixing sleeve (42).

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