A strength testing device for components of a motion rehabilitation machine

Abstract

The utility model discloses a kind of strength testing devices of sports rehabilitation equipment parts, including operation platform, clamping assembly, push rod assembly, driving device and detection element;Clamping assembly is installed on the tabletop of operation platform, for clamping the part to be tested;Pushing assembly includes a U-shaped frame with opening upward and two ejector rods, and two ejector rods are fixedly arranged on the two inner side surfaces of U-shaped frame symmetrically;Pushing assembly is driven by driving device to move linearly on operation platform;When pushing assembly moves unidirectionally, it is used to apply load to the part to be tested clamped on clamping assembly unidirectionally, and detection element is used to test the maximum stress intensity of part;When pushing assembly reciprocates, it is used to apply load to the part to be tested clamped on clamping assembly bidirectionally, and detection element is used to test the fatigue strength of part.The present application can be adapted to different sizes and shapes of part testing, and can test parts in a larger size range.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a strength testing device for components of sports rehabilitation equipment. Background Technology

[0002] With the rapid development of modern medicine and sports science, sports rehabilitation equipment is increasingly widely used in treating sports injuries and improving motor function. These devices are primarily used to help patients regain their athletic ability, improve athletic performance, or alleviate pain and discomfort through physical therapy. To ensure the effectiveness of sports rehabilitation equipment and patient safety, the strength of its components is particularly important. Component strength testing not only helps researchers assess its durability and reliability but also ensures that insufficient component strength will not lead to equipment damage during use, thereby preventing safety accidents.

[0003] The strength of components in sports rehabilitation equipment largely relies on simulation calculations; however, these methods have certain limitations. Simulation calculations struggle to fully account for complex usage scenarios and factors such as the weight and movements of different users. Therefore, there is an urgent need for an efficient, accurate, and reliable testing method to better assess the strength of sports rehabilitation equipment components.

[0004] Chinese patent CN117906891A discloses a fatigue testing device for a hanging chair, using a motor, connecting rope, and fixed pulley as a drive device connected to one end of the hanging chair, and an elastic component connected to the other end, to conduct fatigue testing on the up-and-down vibration of the hanging chair. Chinese patent CN221238631U discloses a mechanical device for fatigue testing of a bicycle front fork, fixing the bicycle front fork to a test platform, with one end connected to a drive cylinder push rod arranged perpendicularly thereto, and conducting fatigue testing through the extension and retraction of the cylinder push rod. Chinese patent CN111175034A proposes an automatic fatigue testing device for a mechanical blood pressure gauge cylinder, using a synchronous belt to drive a piston rod, causing the pressure inside the piston cylinder to repeatedly rise and fall, thereby achieving fatigue testing of the blood pressure gauge cylinder. Chinese patent CN118329338A discloses a strength testing device for automotive leaf springs, using a hydraulic rod in direct contact with the automotive leaf spring to achieve load strength testing of the leaf spring.

[0005] None of the above-mentioned devices are suitable for strength testing of components of sports rehabilitation equipment. Therefore, it is of great significance to propose a test device that can perform maximum stress strength testing and fatigue strength testing on components of sports rehabilitation equipment of different shapes and sizes. Utility Model Content

[0006] To achieve the above objectives, this utility model provides a strength testing device for components of sports rehabilitation equipment.

[0007] The technical solution adopted in this utility model is:

[0008] A component strength testing device for sports rehabilitation equipment includes an operating table, a clamping assembly, a push rod assembly, a drive device, and a testing element;

[0009] The clamping assembly is mounted on the table surface of the operating table and is used to clamp the parts to be tested;

[0010] The jacking assembly includes an upward-opening U-shaped frame and two jacking rods, which are symmetrically fixed to the two inner sides of the U-shaped frame; the jacking assembly is driven by a drive device to move linearly on the operating table;

[0011] When the jacking assembly moves in one direction, it is used to apply a load in one direction to the part to be tested that is clamped on the clamping assembly, and the detection element is used to test the maximum force strength of the part; when the jacking assembly reciprocates, it is used to apply a load in both directions to the part to be tested that is clamped on the clamping assembly, and the detection element is used to test the fatigue strength of the part.

[0012] Furthermore, the drive device includes a servo motor, a reducer, an output shaft, and a synchronous belt drive mechanism. The detection element includes a torque sensor. The servo motor is connected to the torque sensor through the reducer. The torque sensor is connected to the synchronous belt drive mechanism through the output shaft. The synchronous belt drive mechanism is connected to the push assembly. The servo motor drives the synchronous belt to reciprocate, thereby driving the push rod assembly to apply test loads to the parts under test in one or two directions. The torque sensor detects the load value applied to the parts in real time.

[0013] Furthermore, the synchronous belt drive mechanism includes a slide rail, a driving pulley, a driven pulley, a synchronous belt, a toothed plate, an output plate, and a drive shaft; the driving pulley is fixedly mounted on the output shaft, and the driven pulley is rotatably mounted on the operating platform base plate via a bracket and is connected to the driving pulley for synchronous rotation via the synchronous belt; the slide rail is parallel to one side of the synchronous belt, the toothed plate and the output plate are fixedly connected to the tight side of the synchronous belt by screws, the drive shaft is installed in the middle of the output plate, the other end of the drive shaft is fixedly connected to the jacking assembly, and the other side of the output plate is fixed on the slide rail.

[0014] Furthermore, a tensioning mechanism is also provided on the synchronous belt.

[0015] Furthermore, the clamping assembly includes a horizontal clamping platform and a vertical clamping platform. The horizontal clamping platform is used to horizontally clamp the component to be tested, and the vertical clamping platform is used to vertically clamp the component to be tested.

[0016] Furthermore, the vertical clamping platform includes an L-shaped mounting plate that is vertically fixed to the platform by screws, a clamping plate that is movably mounted on the vertical surface of the L-shaped mounting plate, and a four-jaw chuck fixed to the clamping plate.

[0017] Furthermore, two elastic elements are installed on the opposite sides of the two push rods.

[0018] Furthermore, the U-shaped frame consists of a base plate, two upright plates, and two reinforcing blocks. The two upright plates have the same structure and are symmetrically arranged on both sides of the base plate to form the two side plates of the U-shaped frame. The two reinforcing blocks are located at the two corners of the U-shaped frame to strengthen the connection between the upright plates and the base plate.

[0019] Furthermore, both upright plates have elongated holes, and two push rods are symmetrically fixed to the two inner sides of the U-shaped frame by screws passing through the elongated holes. The position of the push rods can be adjusted by the elongated holes and screws to accommodate the testing of parts of different sizes.

[0020] The beneficial effects of this utility model are:

[0021] 1. Through the cooperation of the clamping component and the pushing component, it can adapt to the testing of parts of different sizes and shapes, and can test parts within a large size range.

[0022] 2. By combining the jacking assembly, drive device and detection elements, the maximum stress strength and fatigue strength of the parts can be tested separately.

[0023] 3. The testing device of this application has a simple structure and wide adaptability. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the component strength testing device of the present invention.

[0025] Figure 2 This is a structural diagram showing the installation of the push rod assembly, drive unit, and detection element.

[0026] Figure 3 This is a structural diagram of the drive device and detection element.

[0027] Figure 4 This is a structural diagram of the tensioning mechanism.

[0028] Figure 5 This is a structural diagram of the push rod assembly.

[0029] Figure 6 This is a structural diagram of a vertical clamping platform. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solution of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and a preferred embodiment.

[0031] See Figure 1 A strength testing device for components of a sports rehabilitation device includes an operating table, a clamping assembly, a push rod assembly, a drive device, and a testing element.

[0032] The operating platform includes a frame 206 and a platform 194 and a platform base 160 respectively mounted on the top and bottom surfaces of the frame 206. Four casters with feet are installed at the four corners of the bottom of the frame 206 to facilitate the transfer and fixation of the device, thus enabling convenient on-site testing and application. The platform 194 has elongated holes to allow movement of the push rod assembly, as well as several mounting holes for clamping components.

[0033] In this embodiment, the clamping assembly includes a horizontal clamping platform 24 and a vertical clamping platform 61, both of which are existing technologies.

[0034] See Figure 6 In this embodiment, the vertical clamping platform 61 includes an L-shaped mounting plate vertically fixed to the platform 194 by screws, a clamping plate 231 movably mounted on the L-shaped mounting plate, and a four-jaw chuck 26 fixed on the clamping plate. The height of the four-jaw chuck can be adjusted by moving the clamping plate 231 on the L-shaped mounting plate, and the forward, backward, left, and right displacement of the four-jaw chuck can be adjusted by adjusting the mounting position of the L-shaped mounting plate on the platform 194 to accommodate testing parts of different sizes and shapes. Specifically, several sets of mounting holes can be formed on the platform 194 to adjust the mounting position of the L-shaped mounting plate. Each jaw of the four-jaw chuck 26 can move centripetally independently; by adjusting the jaws, parts of different shapes can be clamped. In other embodiments, a three-jaw chuck can also be used.

[0035] The structure of the horizontal clamp 24 can be the same as that of the vertical clamp 61, or it can be a fixed clamp. The fixed clamp can be used to test parts whose stress position remains unchanged.

[0036] Two clamping platforms are provided to test the maximum stress and fatigue strength of components in horizontal and vertical states, respectively, so as to better ensure the effectiveness of sports rehabilitation equipment and patient safety; and components of different shapes and sizes can be clamped for testing.

[0037] See Figure 5In this embodiment, the pushing assembly includes a base plate 190, two upright plates 192, two reinforcing blocks 193, two push rods 63, and two elastic elements 204. The two upright plates 192 are connected to the base plate 190 to form an upward-facing U-shaped frame. The two reinforcing blocks 193 are located at the two corners of the U-shaped frame to strengthen the connection between the upright plates 192 and the base plate 190. The two upright plates 192 have identical structures and are symmetrically arranged on both sides of the base plate 190, forming the side plates of the U-shaped frame. Each of the two upright plates 192 has two vertically formed elongated holes. The two push rods 63 are fixed to the opposite sides of the two upright plates 192 by screws passing through the elongated holes in the upright plates. The two elastic elements 204 are fixed to the opposite sides of the two push rods 63 to reduce the impact generated when in contact with the measured parts. The push rods 63 can move up and down along the sliding grooves on the upright plates 192 to accommodate measured parts of different sizes. The center of the base plate 190 has a mounting hole for connecting a drive device.

[0038] See Figure 3 and Figure 4 The drive unit includes a drive assembly and a transmission assembly. The drive assembly includes a servo motor 1, a motor mounting plate 178, a reducer 2, a torque sensor 9, a bearing housing 161, a bearing 159, and an output shaft 158. The servo motor 1 is fixedly mounted on the operating table base plate 160 via the motor mounting plate 178. The input end of the reducer 2 is connected to the servo motor 1. The two ends of the torque sensor 9 are connected to the output end of the reducer 2 and the output shaft 158, respectively. The output shaft 158 ​​is rotatably mounted on the operating table base plate 160 via the bearing housing 161.

[0039] The torque sensor 9 serves as a detection element, enabling the real-time acquisition of the load applied to the component under test, thereby facilitating the detection of the component's maximum stress strength and fatigue strength.

[0040] The transmission assembly includes a slide rail 185, a drive pulley 156, a driven pulley 167, a timing belt 179, a tensioning mechanism 180, a gear plate 181, an output plate 186, and a drive shaft 189. The drive pulley 156 is fixedly mounted on the output shaft 158. The driven pulley 167 is rotatably mounted on the operating platform base plate 160 via a bracket and is synchronously connected to the drive pulley 156 via the timing belt 179. The slide rail 185 is parallel to one side of the timing belt 179. The gear plate 181 and the output plate 186 are fixedly connected to the tight side of the timing belt 179 by screws. The drive shaft 189 is mounted in the middle of the output plate 186, and the other end of the drive shaft is fixedly connected to the base plate 190 of the push assembly. The other side of the output plate 186 is fixed to the slide rail 185.

[0041] The tensioning mechanism 180 mainly consists of a mounting plate 180, a tensioning wheel 172, a tensioning wheel mounting plate 177, and a tensioning screw 18. The mounting plate 180 is fixedly mounted on the operating platform base plate 160. A vertical elongated hole is formed in the mounting plate 180. The tensioning wheel mounting plate 177 is connected to the mounting plate 180 by a screw passing through the elongated hole. The tensioning wheel 172 is rotatably mounted on the tensioning wheel mounting plate 177 and is in frictional rotational connection with the synchronous belt 179. A fixed plate is connected to the upper end of the mounting plate 180. The tensioning screw 18 spirals through the fixed plate and is fixedly connected to the tensioning wheel mounting plate 177. By tightening the tensioning screw, the tensioning wheel rises vertically, thereby achieving the tensioning of the synchronous belt.

[0042] The working method of this application is as follows:

[0043] The tester mounts the component under test 25 onto the horizontal clamp 25, adjusts the positions of the horizontal clamp and the push rod 63 to make the contact point between the elastic element on the push rod and the component under test 25 coincide as much as possible with the stress point of the component under actual working conditions; the servo motor 1 is started, and the synchronous belt 179 drives the pushing assembly to apply a load to the component under test 25. The real-time stress condition of the component can be obtained through the torque sensor 9. When the pushing assembly moves in one direction, the maximum stress strength of the component can be tested; when the pushing assembly reciprocates, the fatigue strength of the component can be tested.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications are also within the protection scope of the present utility model.

Claims

1. A strength testing device for components of a sports rehabilitation device, characterized in that, Includes an operating table, clamping assembly, push rod assembly, drive unit, and detection elements. The clamping assembly is mounted on the table surface of the operating table and is used to clamp the parts to be tested; The jacking assembly includes an upward-facing U-shaped frame and two jacking rods (63), which are symmetrically fixed on the two inner sides of the U-shaped frame; the jacking assembly is driven by a drive device to move linearly on the operating table; When the jacking assembly moves in one direction, it is used to apply a load in one direction to the part to be tested that is clamped on the clamping assembly, and the detection element is used to test the maximum force strength of the part; when the jacking assembly reciprocates, it is used to apply a load in both directions to the part to be tested that is clamped on the clamping assembly, and the detection element is used to test the fatigue strength of the part.

2. The component strength testing device for a sports rehabilitation device according to claim 1, characterized in that, The drive unit includes a servo motor (1), a reducer (2), an output shaft (158), and a synchronous belt drive mechanism. The detection element includes a torque sensor (9). The servo motor (1) is connected to the torque sensor (9) through the reducer (2). The torque sensor (9) is connected to the synchronous belt drive mechanism through the output shaft (158). The synchronous belt drive mechanism is connected to the push assembly. The servo motor (1) drives the synchronous belt to reciprocate, thereby driving the push rod assembly to apply test loads to the parts to be tested in one or two directions. The torque sensor (9) detects the load value applied to the parts in real time.

3. The component strength testing device for a sports rehabilitation device according to claim 2, characterized in that, The synchronous belt drive mechanism includes a slide rail (185), a drive pulley (156), a driven pulley (167), a synchronous belt (179), a toothed plate (181), an output plate (186), and a drive shaft (189). The drive pulley (156) is fixedly mounted on the output shaft (158). The driven pulley (167) is rotatably mounted on the operating platform base plate (160) via a bracket and is synchronously connected to the drive pulley (156) via the synchronous belt (179). The slide rail (185) is parallel to one side of the synchronous belt (179). The toothed plate (181) and the output plate (186) are fixedly connected to the tight side of the synchronous belt (179) by screws. The drive shaft (189) is installed in the middle of the output plate (186). The other end of the drive shaft is fixedly connected to the push assembly. The other side of the output plate (186) is fixed on the slide rail (185).

4. The component strength testing device for a sports rehabilitation device according to claim 3, characterized in that, The synchronous belt (179) is also equipped with a tensioning mechanism (180).

5. The component strength testing device for a sports rehabilitation device according to claim 1, characterized in that, The clamping assembly includes a horizontal clamp (24) and a vertical clamp (61). The horizontal clamp (24) is used to clamp the parts to be tested horizontally, and the vertical clamp (61) is used to clamp the parts to be tested vertically.

6. The component strength testing device for a sports rehabilitation device according to claim 5, characterized in that, The vertical clamp (61) includes an L-shaped mounting plate that is vertically fixed to the platform (194) by screws, a clamp (231) that is movably mounted on the vertical surface of the L-shaped mounting plate, and a four-jaw chuck (26) fixed to the clamp.

7. The component strength testing device for a sports rehabilitation device according to claim 1, characterized in that, Two elastic elements (204) are installed on the opposite sides of the two push rods (63).

8. The component strength testing device for a sports rehabilitation device according to claim 1, characterized in that, The U-shaped frame consists of a base plate (190), two upright plates (192), and two reinforcing blocks (193). The two upright plates (192) have the same structure and are symmetrically arranged on both sides of the base plate (190) to form the two side plates of the U-shaped frame. The two reinforcing blocks (193) are located at the two corners of the U-shaped frame to strengthen the connection between the upright plates (192) and the base plate (190).

9. The component strength testing device for a sports rehabilitation device according to claim 8, characterized in that, Both upright plates (192) have elongated holes, and the two top rods (63) are symmetrically fixed to the two inner sides of the U-shaped frame by screws passing through the elongated holes.

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