Fatigue testing device for rod piece structure of medical instrument

Abstract

The utility model relates to the technical field of fatigue testing equipment, and discloses a fatigue testing device of a medical instrument rod piece structure, which comprises a support frame, a first testing mechanism, a second testing mechanism and a track, an electric telescopic rod is arranged at the top of the support frame, and the bottom of the electric telescopic rod is fixedly connected with a mounting plate; the fatigue testing device comprises a first testing mechanism and a second testing mechanism, the first testing mechanism comprises a fixing frame and a supporting block, the outer portion of the fixing frame is fixedly connected with a pressing plate, the second testing mechanism comprises a clamping mechanism and a fixing block, and the outer portion of the fixing block is fixedly connected with a limiting rod. The device has the advantage of testing the transverse and longitudinal fatigue of the rod piece, the transverse fatigue of the rod piece is tested by using the first testing mechanism, the longitudinal fatigue of the rod piece is tested by using the second testing mechanism, and the problem that the fatigue test of the rod piece structure of the medical instrument at present is lack of comprehensiveness due to the fact that only one-way test is performed aiming at the using habit of the instrument is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fatigue testing equipment, in particular to a fatigue testing device for the rod structure of medical devices. Background Technique

[0002] Fatigue tests are mainly used to test the use stability of products. Medical devices such as artificial joints, brackets, implants, dental membranes, and dental implants need to withstand long-term use and loads. Therefore, fatigue tests are required to simulate actual use conditions and evaluate the durability and lifespan of the devices. In addition, for biomedical materials, medical implant materials, and other devices that need to be used frequently, long-term loading and flexure tests are performed on these materials through fatigue tests to evaluate their fatigue performance and lifespan, so as to ensure reliability in medical applications. For example, fatigue tests on syringe barrels and piston cores.

[0003] The currently used fatigue testing equipment for the rod structure of medical devices includes a structure for supporting the rod and a structure for repeatedly applying pressure, which can achieve repeated pressure tests on the rod within a set time to detect the fatigue of the rod. However, the equipment generally only performs single-direction stress tests on the rod, resulting in a lack of comprehensive testing structures and limited application ranges. For this reason, we propose a fatigue testing device for the rod structure of medical devices. Content of the Utility Model

[0004] Aiming at the deficiency that the fatigue test of the rod structure of medical devices in the prior art only performs one-way tests according to the usage habits of the devices and lacks comprehensiveness, the utility model provides a fatigue testing device for the rod structure of medical devices, which has the advantages of testing the transverse and longitudinal fatigue degrees of the rod.

[0005] To achieve the above object, the utility model provides the following technical solution: A fatigue testing device for the rod structure of medical devices, including a support frame, a first testing mechanism, a second testing mechanism, and a track. An electric telescopic rod is installed on the top of the support frame, and a mounting plate is fixedly connected to the bottom of the electric telescopic rod;

[0006] The first testing mechanism includes a fixing frame and a support block, and a pressing plate is fixedly connected to the outside of the fixing frame;

[0007] The second testing mechanism includes a clamping mechanism and a fixing block, and a limiting rod is fixedly connected to the outside of the fixing block.

[0008] Preferably, the first testing mechanism further includes a fixing plate and a slider. A fixing shell is fixedly connected to the bottom of the fixing plate. The fixing frame is installed on the outside of the fixing shell. The support block is fixedly connected to the top of the slider, and a limiting groove is opened on the top of the support block.

[0009] Preferably, an elastic plate for fixing is provided at the bottom of the support block, an adjusting bolt is provided inside the fixing plate, a fixing nut corresponding to the adjusting bolt is provided inside the slider, and the adjusting bolt is threadedly connected to the inside of the fixing nut.

[0010] Preferably, the second testing mechanism further includes a fixing plate, a fixing housing corresponding to the mounting plate, and a slider matching the track. The clamping mechanism is fixed to the bottom of the fixing housing, the fixing block is fixed to the top of the slider, and a limiting bolt is provided inside the limiting rod.

[0011] Preferably, the clamping mechanism includes a sleeve and a knob. The sleeve is provided with a threaded sleeve structure with a slot at the top, and the cross-sectional area of the top opening is larger than that of the bottom structure. The knob is detachably connected to the outside of the sleeve, and the knob can rotate outside the sleeve to drive the sleeve to tighten.

[0012] Preferably, a reserved hole corresponding to the limiting bolt is provided at the top of the track, and the limiting bolt is clamped inside the reserved hole, and the position of the fixing block can be restricted by the limiting bolt.

[0013] Preferably, the first testing mechanism is fixedly connected to the mounting plate by bolts, and the slider is slidably connected to the inside of the track, and the slider can move inside the track.

[0014] Beneficial effects:

[0015] 1. For the fatigue testing device of the medical device rod structure, the first testing mechanism is used to horizontally fix the rod to test the fatigue degree of the rod, and the second testing mechanism is used to longitudinally fix the rod to complete the fatigue degree test. It can be applicable to the horizontal and longitudinal fatigue degree tests of medical device rods, increasing the application range of the device.

[0016] 2. For the fatigue testing device of the medical device rod structure, the fixing block is restricted to the middle area of the track by the limiting bolt, and the clamping mechanism can be used to clamp the longitudinal rod for fatigue degree testing. At the same time, by removing the limiting bolt, the slider can be controlled to slide inside the track to take out the fixing block, so that the two set support blocks can be further close to test the fatigue degree of the short rod. Description of the drawings

[0017] Figure 1 It is a schematic structural diagram of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of the first testing mechanism of the present utility model;

[0019] Figure 3 It is a schematic structural diagram of the second testing mechanism of the present utility model.

[0020] In the figure: 1, support frame; 2, electric telescopic rod; 3, mounting plate; 4, first testing mechanism; 5, second testing mechanism; 6, track; 7, reserved hole; 8, fixing plate; 9, fixing housing; 10, fixing frame; 11, pressing plate; 12, slider; 13, support block; 14, adjusting bolt; 15, limiting groove; 16, clamping mechanism; 17, sleeve; 18, knob; 19, fixing block; 20, limiting rod; 21, limiting bolt. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0022] Embodiment 1

[0023] As Figures 1-3 , a fatigue testing device for a medical device rod structure, includes a support frame 1, a first testing mechanism 4, a second testing mechanism 5 and a track 6. An electric telescopic rod 2 is installed at the top of the support frame 1, and the bottom of the electric telescopic rod 2 is fixedly connected to a mounting plate 3. The first testing mechanism 4 includes a fixing frame 10 and a support block 13. A pressing plate 11 is fixedly connected to the outside of the fixing frame 10. The second testing mechanism 5 includes a clamping mechanism 16 and a fixing block 19. A limiting rod 20 is fixedly connected to the outside of the fixing block 19.

[0024] Among them, the first testing mechanism 4 further includes a fixing plate 8 and a slider 12. The bottom of the fixing plate 8 is fixedly connected to a fixing housing 9. The fixing frame 10 is installed outside the fixing housing 9. The support block 13 is fixedly connected to the top of the slider 12. A limiting groove 15 is opened at the top of the support block 13. An elastic plate for fixing is arranged at the bottom of the support block 13. An adjusting bolt 14 is arranged inside the fixing plate. A fixing nut corresponding to the adjusting bolt 14 is arranged inside the slider 12. The adjusting bolt 14 is threadedly connected to the inside of the fixing nut.

[0025] Among them, the second testing mechanism 5 further includes a fixing plate and a fixing housing corresponding to the mounting plate 3 and a slider matching the track 6. The clamping mechanism 16 is fixed to the bottom of the fixing housing. The fixing block 19 is fixed to the top of the slider. A limiting bolt 21 is arranged inside the limiting rod 20. The clamping mechanism 16 includes a sleeve 17 and a knob 18. The sleeve 17 is set as a threaded sleeve structure with a groove opened at the top, and the cross-sectional area of the top opening is larger than the cross-sectional area of the bottom structure. The knob 18 is detachably connected to the outside of the sleeve 17, and the knob 18 can rotate outside the sleeve 17 to drive the sleeve 17 to tighten.

[0026] Working principle: When the fatigue test device for the rod structure of medical devices is in use, the rod can be horizontally fixed by the first test mechanism 4, that is, structures such as the fixing frame 10 and the pressing plate 11 are fixed to the bottom of the mounting plate 3 through fixing bolts, so as to use the electric telescopic rod 2 to drive the device to perform fatigue tests on the rod placed inside the limiting groove 15. At the same time, the slider 12 is slidably connected to the inside of the track 6, and the position of the slider 12 relative to the track 6 can be adjusted by the tightening and adjusting bolt 14 to adjust the applicable range of the device for testing the fatigue degree of the rod. When the second test mechanism 5 is used to fix the rod longitudinally, the first test mechanism 4 needs to be disassembled. After installing the second test mechanism 5, the rod is clamped inside the clamping mechanism 16, and the electric telescopic rod 2 drives the second test mechanism 5 to complete the fatigue test, which can be applicable to the horizontal and longitudinal fatigue tests of the medical device rod, increasing the use range of the device.

[0027] Embodiment 2

[0028] As Figures 1-3 , on the basis of Embodiment 1, further, the first test mechanism 4 is fixedly connected to the mounting plate 3 by bolts. The slider 12 is slidably connected to the inside of the track 6. The slider 12 can move inside the track 6. A reserved hole 7 corresponding to the limit bolt 21 is opened at the top of the track 6. The limit bolt 21 is clamped inside the reserved hole 7, and the position of the fixed block 19 can be restricted by the limit bolt 21.

[0029] Working principle: When the fatigue test device for the rod structure of medical devices is in use, the fixed block 19 can be restricted to the middle area of the track 6 by the limit bolt 21, which can cooperate with the clamping mechanism 16 to clamp the longitudinal rod for fatigue testing. At the same time, by removing the limit bolt 21, the slider 12 can be controlled to slide inside the track 6 to remove the fixed block 19, so that the two set support blocks 13 can be further close to perform fatigue testing on the short rod.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fatigue testing device for a medical device rod structure, comprising a support frame (1), a first testing mechanism (4), a second testing mechanism (5) and a track (6), characterized in that: An electric telescopic rod (2) is installed at the top of the support frame (1), and the bottom of the electric telescopic rod (2) is fixedly connected to a mounting plate (3); The first testing mechanism (4) includes a fixed frame (10) and a support block (13), and a pressing plate (11) is fixedly connected to the outside of the fixed frame (10); The second testing mechanism (5) includes a clamping mechanism (16) and a fixed block (19), and a limiting rod (20) is fixedly connected to the outside of the fixed block (19).

2. The fatigue test device for a medical device rod structure according to claim 1, characterized in that: The first testing mechanism (4) further includes a fixing plate (8) and a slider (12), the bottom of the fixing plate (8) is fixedly connected to a fixed housing (9), the fixed frame (10) is installed on the outside of the fixed housing (9), the support block (13) is fixedly connected to the top of the slider (12), and a limiting groove (15) is opened at the top of the support block (13).

3. The fatigue test device for a medical device rod structure according to claim 2, characterized in that: A fixing elastic plate is arranged at the bottom of the support block (13), an adjusting bolt (14) is arranged inside the fixing plate, a fixing nut corresponding to the adjusting bolt (14) is arranged inside the slider (12), and the adjusting bolt (14) is threadedly connected to the inside of the fixing nut.

4. The fatigue testing device for a medical device rod structure according to claim 1, characterized in that: The second testing mechanism (5) further includes a fixing plate and a fixed housing corresponding to the mounting plate (3) and a slider matching the track (6), the clamping mechanism (16) is fixed to the bottom of the fixed housing, the fixed block (19) is fixed to the top of the slider, and a limiting bolt (21) is arranged inside the limiting rod (20).

5. The fatigue testing device for a medical device rod structure according to claim 1, characterized in that: The clamping mechanism (16) includes a sleeve (17) and a knob (18), the sleeve (17) is arranged as a threaded sleeve structure with a groove opened at the top, the cross-sectional area of the top opening is larger than that of the bottom structure, and the knob (18) is detachably connected to the outside of the sleeve (17).

6. The fatigue test device for a medical device rod structure according to claim 4, characterized in that: A reserved hole (7) corresponding to the limiting bolt (21) is opened at the top of the track (6), and the limiting bolt (21) is clamped inside the reserved hole (7).

7. The fatigue test device for a medical device rod structure according to claim 2, characterized in that: The first testing mechanism (4) is fixedly connected to the mounting plate (3) by bolts, and the slider (12) is slidably connected to the inside of the track (6).

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