Acetabular component prying-out testing device

Abstract

The utility model discloses an acetabulum part prying-out testing device, and particularly relates to the technical field of artificial joint prosthesis testing, which comprises a working table, a base fixedly arranged at the top of the working table, a mounting cylinder fixedly arranged at the top of the base, a fixing frame fixedly arranged at the top of the mounting cylinder, and a fixing mechanism arranged on one side of the fixing frame. The fixing mechanism comprises a through pipe fixedly arranged in the fixing frame, a suction cup is arranged at the top of the through pipe in a penetrating mode, an air pump is fixedly arranged at one end of the through pipe, a plurality of first electric telescopic rods are fixedly arranged on the inner wall of the fixing frame, and fixing plates are fixedly arranged at the output ends of the first electric telescopic rods. Guide blocks are fixedly arranged on the two sides of the fixing plate, and a guide groove is formed in the inner wall of the fixing frame. According to the utility model, the sucker is matched with the arc-shaped rubber plate, so that the acetabulum parts with different sizes are firmly fixed, the acetabulum parts are convenient to disassemble and replace, and the device is convenient to maintain and the test precision is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to artificial joint prosthesis testing technical field more specifically, the utility model relates to a kind of hip joint component prying out test device. BACKGROUND

[0002] With the aggravation of population aging and the improvement of people's quality of life, the number of patients receiving artificial hip joint replacement surgery increases year by year, in clinical application, the acetabular component needs to bear various complex loads of human body for a long time, such as the force generated by walking, running, jumping and other movements;

[0003] Among them, the connection stability between the acetabular liner and the acetabular cup is one of the key problems, if the connection strength is insufficient, it may cause the acetabular liner to be pulled out of the acetabular cup, causing prosthesis loosening, pain, dysfunction and other serious complications, causing great pain and economic burden to patients;

[0004] Due to the differences in size, shape, structure and other aspects of the acetabular components produced by different manufacturers, the existing device can only fix one size of acetabular cup, when the acetabular cups of different sizes need to be prying out for testing, only the special fixing device can be frequently replaced, and even the entire testing equipment may need to be replaced, which not only increases the workload of the operator, but also requires re-commissioning, calibration and other operations during the replacement process, which consumes a lot of time and effort, seriously affects the testing efficiency, increases the cost and complexity of testing. UTILITY MODEL CONTENT

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides an acetabular component prying out test device to solve the problems raised in the above background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] An acetabular component prying out test device, comprising a workbench, a base is fixedly arranged on the top of the workbench, an installation cylinder is fixedly arranged on the top of the base, a fixed frame is fixedly arranged on the top of the installation cylinder, and a fixing mechanism is arranged on one side of the fixed frame.

[0008] The fixing mechanism comprises a through pipe fixedly arranged in the fixing frame, a suction cup is arranged on the top of the through pipe, a gas pump is fixedly arranged at one end of the through pipe, a plurality of first electric telescopic rods are fixedly arranged on the inner wall of the fixing frame, a fixing plate is fixedly arranged at the output end of each of the first electric telescopic rods, guide blocks are fixedly arranged on the two sides of the fixing plate, guide grooves are arranged on the inner wall of the fixing frame, the guide blocks are in sliding connection with the guide grooves, an arc-shaped rubber plate is arranged on one side of the fixing plate, an installation groove is arranged on the surface of the fixing plate, a T-shaped strip is insertedly arranged in the installation groove, one side of the T-shaped strip is connected with one side of the arc-shaped rubber plate, two U-shaped frames are fixedly arranged on the surface of the fixing plate, and a plug bolt is insertedly arranged in each of the U-shaped frames and connected with one of the U-shaped frames through a bolt.

[0009] By adopting the above technical scheme, the suction cup and the gas pump can preliminarily fix the component, prevent displacement of the component in subsequent operation, increase friction of the arc-shaped rubber plate, avoid damage to the component, realize firm fixing, facilitate disassembly and replacement, facilitate maintenance of the device and guarantee test accuracy.

[0010] As a further description of the above technical scheme, a fixing table is fixedly arranged on the top of the workbench, a small stepping motor is fixedly installed on one side of the fixing table, a screw rod is fixedly arranged at the output end of the small stepping motor, a moving block is threadedly connected with the outer portion of the screw rod, and the moving block is in sliding connection with the fixing table.

[0011] By adopting the above technical scheme, the rotation angle and speed can be accurately controlled, the position of the moving block can be accurately adjusted, the position adjustment of the pry bar and other components is more accurate and reliable, and the flexibility and accuracy of test operation are improved.

[0012] As a further description of the above technical scheme, a pry-out mechanism is arranged on the top of the moving block, the pry-out mechanism comprises a second electric telescopic rod fixedly arranged on the top of the moving block, a first stabilizing block is fixedly arranged at the output end of the second electric telescopic rod, a pry bar is hingedly arranged on one side of the first stabilizing block, a second stabilizing block is hingedly arranged at one end of the pry bar, the other end of the pry bar is arranged in an arc shape, an L-shaped support frame is fixedly arranged on the top of the moving block, a hydraulic cylinder is fixedly arranged on one side of the L-shaped support frame, the output end of the hydraulic cylinder is connected with the second stabilizing block, a pressure sensor is fixedly arranged on one side of the pry bar, and a displacement sensor is fixedly arranged on one side of the pressure sensor.

[0013] By adopting the above technical scheme, the pry bar can accurately contact the acetabular component, adapt to test requirements of different components, stably rotate and exert pry-out force, the force exertion process is stable and controllable, and the scientificity and accuracy of test results are guaranteed.

[0014] The utility model discloses a technical effect and advantage:

[0015] 1, through setting up fixed mechanism, compared with prior art, through the adsorbing disc negative pressure preliminary fixation, prevent component displacement, further fixed again with electric telescopic link pushing fixed plate and arc rubber board, guarantee firm fixed, arc rubber board increases contact area and friction force simultaneously, and avoids damaging component surface, unscrews bolt and pulls out plug, removes the restriction of U-shaped frame to arc rubber board, and then is disassembled through the mode of pulling out T-shaped strip, simple and convenient operation, convenient for the replacement and maintenance of long -term use arc rubber board, guarantee the normal use and test precision of device, and the disassembly mode can not cause damage to fixed plate and other components, prolongs the service life of device,

[0016] 2, through setting up levering mechanism, compared with prior art, position adjustment is flexible, through small -size stepper motor and screw rod can accurate adjustment moving block position, make the lever in suitable initial position, and the second electric telescopic link can accurately adjust lever height, guarantee lever accurate contact component, promote test accuracy, power application stability, and the hydraulic cylinder pushes second stabilizer block, and lever rotates around the hinge point and exerts force, and the structure is stable, and the transmission of force is even, and further improve stability, guarantee the accuracy and scientificity of test result. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model.

[0018] Figure 2 It is fixed mechanism structure schematic diagram of the utility model.

[0019] Figure 3 It is fixed mechanism overhead structure schematic diagram of the utility model.

[0020] Figure 4 It is the Figure 3 A place of the utility model's enlargement structure schematic diagram.

[0021] Figure 5 It is levering mechanism structure schematic diagram of the utility model.

[0022] Figure 6 It is the whole front view cross section structure schematic diagram of the utility model.

[0023] The reference signs are: 1, workbench; 2, base; 3, mounting cylinder; 4, fixed frame; 5, through pipe; 6, suction cup; 7, air pump; 8, first electric telescopic rod; 9, fixed plate; 10, guide block; 11, arc-shaped rubber plate; 12, T-shaped strip; 13, U-shaped frame; 14, plug bolt; 15, fixed table; 16, small stepping motor; 17, screw rod; 18, moving block; 19, second electric telescopic rod; 20, first stabilizing block; 21, pry bar; 22, second stabilizing block; 23, L-shaped support frame; 24, hydraulic cylinder; 25, pressure sensor; 26, displacement sensor. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] The embodiments of the application disclose a kind of acetabulum component pry out test device as shown in Figures 1-6 The reference signs are: 1, workbench; 2, base; 3, mounting cylinder; 4, fixed frame; 5, through pipe; 6, suction cup; 7, air pump; 8, first electric telescopic rod; 9, fixed plate; 10, guide block; 11, arc-shaped rubber plate; 12, T-shaped strip; 13, U-shaped frame; 14, plug bolt; 15, fixed table; 16, small stepping motor; 17, screw rod; 18, moving block; 19, second electric telescopic rod; 20, first stabilizing block; 21, pry bar; 22, second stabilizing block; 23, L-shaped support frame; 24, hydraulic cylinder; 25, pressure sensor; 26, displacement sensor.

[0026] The fixing mechanism comprises a through pipe 5 fixedly arranged inside the fixing frame 4, a suction cup 6 arranged through the top of the through pipe 5, a gas pump 7 fixedly arranged at one end of the through pipe 5, a plurality of first electric telescopic rods 8 fixedly arranged on the inner wall of the fixing frame 4, a fixing plate 9 fixedly arranged at the output end of each of the first electric telescopic rods 8, a guide block 10 fixedly arranged on each side of the fixing plate 9, a guide groove arranged on the inner wall of the fixing frame 4, the guide block 10 being in sliding connection with the guide groove, an arc-shaped rubber plate 11 arranged on one side of the fixing plate 9, an installation groove arranged on the surface of the fixing plate 9, a T-shaped strip 12 inserted into the installation groove, one side of the T-shaped strip 12 being connected with one side of the arc-shaped rubber plate 11, two U-shaped frames 13 fixedly arranged on the surface of the fixing plate 9, and a plug 14 inserted into each of the U-shaped frames 13 and connected with one of the U-shaped frames 13 through a bolt. The acetabular component is placed at a proper position in the fixing frame 4, and then the gas pump 7 is started to form negative pressure in the suction cup 6 through the through pipe 5, so that the surface of the acetabular component is adsorbed on the suction cup 6, and the acetabular component is preliminarily fixed. The adsorption of the suction cup 6 can prevent the component from being displaced greatly in the subsequent fixing operation. Then, the plurality of first electric telescopic rods 8 are started to drive the fixing plate 9 to move along the guide groove and towards the acetabular component. Since the guide block 10 is in sliding connection with the guide groove, the stability and linearity of the movement of the fixing plate 9 are ensured. When the fixing plate 9 approaches the acetabular component, the arc-shaped rubber plate 11 on one side of the fixing plate 9 is in contact with the surface of the acetabular component and gradually applies pressure, so that the acetabular component is further fixed in the fixing frame 4. The arc-shaped rubber plate 11 can increase the contact area and friction force with the acetabular component, and meanwhile avoid damaging the surface of the component.

[0027] When the arc-shaped rubber plate 11 used for a long time needs to be finely disassembled, the bolt connecting the plug 14 with one of the U-shaped frames 13 is first unscrewed, because the plug 14 is connected with one of the U-shaped frames 13 through the bolt. Then, the plug 14 is pulled out from the inside of the two U-shaped frames 13, so that the limitation of the arc-shaped rubber plate 11 by the U-shaped frames 13 is released. Then, the arc-shaped rubber plate 11 is held and pulled in parallel away from the fixing plate 9, so that the T-shaped strip 12 is gradually pulled out from the installation groove on the surface of the fixing plate 9. The pulling is continued until the T-shaped strip 12 is completely pulled out from the installation groove, so that the arc-shaped rubber plate 11 is separated from the fixing plate 9, and the arc-shaped rubber plate 11 is disassembled.

[0028] Referring to Figures 3-4The top of the workbench 1 is fixedly provided with a fixed table 15, one side of the fixed table 15 is fixedly provided with a small stepping motor 16, the output end of the small stepping motor 16 is fixedly provided with a screw rod 17, the outer thread of the screw rod 17 is connected with a moving block 18, the moving block 18 is slidably connected with the fixed table 15, then the rotation of the screw rod 17 is adjusted through the small stepping motor 16, when the screw rod 17 rotates, the moving block 18 connected with the outer thread of the screw rod 17 will slide on the fixed table 15, since the moving block 18 is slidably connected with the fixed table 15, it is ensured that the moving block 18 can only move along the axis direction of the screw rod 17, so as to adjust the position of the moving block 18, and make the pry bar 21 be in the appropriate initial position, thereby facilitating the pry-out operation of the acetabular component.

[0029] Referring to Figures 5-6 The top of the moving block 18 is provided with a pry-out mechanism, the pry-out mechanism comprises a second electric telescopic rod 19 fixedly arranged on the top of the moving block 18, the output end of the second electric telescopic rod 19 is fixedly provided with a first stabilizing block 20, one side of the first stabilizing block 20 is hingedly provided with a pry bar 21, one end of the pry bar 21 is hingedly provided with a second stabilizing block 22, the other end of the pry bar 21 is provided in an arc shape, the top of the moving block 18 is fixedly provided with an L-shaped support frame 23, one side of the L-shaped support frame 23 is fixedly provided with a hydraulic cylinder 24, the output end of the hydraulic cylinder 24 is connected with the second stabilizing block 22, one side of the pry bar 21 is fixedly provided with a pressure sensor 25, one side of the pressure sensor 25 is fixedly provided with a displacement sensor 26, according to the height and position of the acetabular component, the second electric telescopic rod 19 is started, the second electric telescopic rod 19 is fixed on the top of the moving block 18, the output end of the second electric telescopic rod 19 is connected with the first stabilizing block 20, the height of the first stabilizing block 20 is adjusted, and then the height of the pry bar 21 is adjusted, so that the arc-shaped end of the pry bar 21 can accurately contact the position of the acetabular component requiring pry force;

[0030] Then the hydraulic cylinder 24 is started, the hydraulic cylinder 24 is fixed on one side of the L-shaped support frame 23, the L-shaped support frame 23 is fixed on the top of the moving block 18, the output end of the hydraulic cylinder 24 is connected with the second stabilizing block 22, the output end of the hydraulic cylinder 24 pushes the second stabilizing block 22, since the two ends of the pry bar 21 are respectively hingedly connected with the first stabilizing block 20 and the second stabilizing block 22, under the pushing of the second stabilizing block 22, the pry bar 21 rotates around the hinged point with the first stabilizing block 20, and the pry force is applied to the acetabular component;

[0031] When the pry bar 21 applies the pry-out force to the acetabular component, the pressure sensor 25 and the displacement sensor 26 respectively monitor the force applied by the pry bar 21 to the acetabular component and the displacement of the acetabular component in real time, by converting the physical quantity into an electrical signal and transmitting it to the data acquisition system, the key data support is provided for the acetabular component pry-out test, which is helpful to accurately evaluate the quality and performance of the acetabular component.

[0032] The utility model discloses a working principle:

[0033] The utility model discloses a kind of acetabulum component pry out testing device, the device when using, acetabulum component is placed in fixed frame 4 in proper position, then start air pump 7, air pump 7 is formed by through pipe 5 inside suction cup 6 Negative pressure, to adsorb the surface of acetabulum component on suction cup 6, acetabulum component is preliminarily fixed, the adsorption of suction cup 6 can prevent the displacement of component in subsequent fixing operation, then start multiple first electric telescopic rod 8, the output end of first electric telescopic rod 8 pushes fixed plate 9 and moves along guide slot to acetabulum component direction, since guide block 10 is slidably connected with guide slot, the stability and linearity of fixed plate 9 movement are guaranteed, when fixed plate 9 is close to acetabulum component, arc rubber plate 11 on the side of fixed plate 9 is contacted with the surface of acetabulum component and gradually exerts pressure, further acetabulum component is firmly fixed in fixed frame 4, arc rubber plate 11 can increase the contact area and friction force with acetabulum component, while avoiding damage to component surface;

[0034] Then screw rod 17 is adjusted by small stepping motor 16 to rotate, when screw rod 17 rotates, moving block 18 connected with the external thread of screw rod 17 can slide on fixed table 15, since moving block 18 is slidably connected with fixed table 15, it is ensured that moving block 18 can only move along the axial direction of screw rod 17, so as to adjust the position of moving block 18, so that pry bar 21 is in suitable initial position, and it is convenient to pry out acetabulum component operation;

[0035] And according to the height and position of acetabulum component, start second electric telescopic rod 19, second electric telescopic rod 19 is fixed at the top of moving block 18, and the output end thereof is connected with first stabilizing block 20, to adjust the height of first stabilizing block 20, and further adjust the height of pry bar 21, so that the arc-shaped end of pry bar 21 can accurately contact the position of acetabulum component requiring pry force;

[0036] Then start hydraulic cylinder 24, hydraulic cylinder 24 is fixed on one side of L-shaped support frame 23, L-shaped support frame 23 is fixed on the top of moving block 18, the output end of hydraulic cylinder 24 is connected with second stabilizing block 22, the output end of hydraulic cylinder 24 pushes second stabilizing block 22, since pry bar 21 is hinged with first stabilizing block 20 and second stabilizing block 22 at two ends, pry bar 21 rotates around the hinge point with first stabilizing block 20 under the pushing of second stabilizing block 22, to exert pry force on acetabulum component;

[0037] When the pry bar 21 exerts the pry-out force on the acetabular component, the pressure sensor 25 and the displacement sensor 26 monitor the force exerted by the pry bar 21 on the acetabular component and the displacement of the acetabular component in real time, respectively, by converting physical quantities into electrical signals and transmitting them to the data acquisition system, providing key data support for the acetabular component pry-out test, helping to accurately evaluate the quality and performance of the acetabular component, the model of the pressure sensor 25 is HBMP3MB pressure sensor, the model of the displacement sensor 26 is HBMW1ELA0 inductive displacement sensor, wherein the pressure sensor 25 and the displacement sensor 26 are prior art, and thus will not be described in detail in the technical scheme;

[0038] When it is necessary to finely disassemble the long-term used arc-shaped rubber plate 11, first, the bolt connecting the plug 14 and one of the U-shaped frames 13 is unscrewed, because the plug 14 is connected with one of the U-shaped frames 13 through the bolt, then the plug 14 is pulled out from the inside of the two U-shaped frames 13, at this time, the limitation of the U-shaped frame 13 to the arc-shaped rubber plate 11 is released, then hold the arc-shaped rubber plate 11 and pull it in parallel away from the fixed plate 9, so that the T-shaped strip 12 is gradually pulled out from the installation groove on the surface of the fixed plate 9, continue to pull until the T-shaped strip 12 is completely pulled out from the installation groove, at this time, the arc-shaped rubber plate 11 is separated from the fixed plate 9, and the arc-shaped rubber plate 11 is disassembled.

[0039] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A device for a hip-joint cup prying-out test, comprising a workbench (1), characterized in that: The top of the workbench (1) is fixedly provided with a base (2), the top of the base (2) is fixedly provided with a mounting cylinder (3), the top of the mounting cylinder (3) is fixedly provided with a fixed frame (4), and one side of the fixed frame (4) is provided with a fixing mechanism. The fixing mechanism comprises a through pipe (5) fixedly arranged in the fixed frame (4), a suction cup (6) throughly arranged at the top of the through pipe (5), a gas pump (7) fixedly arranged at one end of the through pipe (5), a plurality of first electric telescopic rods (8) fixedly arranged on the inner wall of the fixed frame (4), a fixing plate (9) fixedly arranged at the output end of each of the first electric telescopic rods (8), a guide block (10) fixedly arranged on both sides of the fixing plate (9), a guide groove formed in the inner wall of the fixed frame (4), and the guide block (10) is in sliding connection with the guide groove.

2. The acetabular component prying-out test device of claim 1, wherein: An installation groove is formed in the surface of the fixing plate (9), and a T-shaped strip (12) is inserted into the installation groove.

3. The acetabular component prying-out test device of claim 1, wherein: Two U-shaped frames (13) are fixedly arranged on the surface of the fixing plate (9), and an insertion bolt (14) is inserted into each of the U-shaped frames (13).

4. The acetabular component prying-out test device of claim 1, wherein: The top of the workbench (1) is fixedly provided with a fixed table (15), one side of the fixed table (15) is fixedly provided with a small stepping motor (16), and the output end of the small stepping motor (16) is fixedly provided with a screw rod (17).

5. The acetabular component prying-out test device of claim 4, wherein: The outer thread of the screw rod (17) is connected with a moving block (18), and the moving block (18) is in sliding connection with the fixed table (15).

6. The acetabular component prying-out test device of claim 5, wherein: The top of the moving block (18) is provided with a prying mechanism, and the prying mechanism comprises a second electric telescopic rod (19) fixedly arranged on the top of the moving block (18), a first stabilizing block (20) fixedly arranged at the output end of the second electric telescopic rod (19), a prying lever (21) hingedly arranged on one side of the first stabilizing block (20), a second stabilizing block (22) hingedly arranged at one end of the prying lever (21), and the other end of the prying lever (21) is in arc shape.

7. The acetabular component prying-out test device of claim 5, wherein: The top of the moving block (18) is fixedly provided with an L-shaped support frame (23), one side of the L-shaped support frame (23) is fixedly provided with a hydraulic cylinder (24), and the output end of the hydraulic cylinder (24) is connected with the second stabilizing block (22).

8. The acetabular component prying-out test device of claim 6, wherein: One side of the prying lever (21) is fixedly provided with a pressure sensor (25), and one side of the pressure sensor (25) is fixedly provided with a displacement sensor (26).

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