CN211904957U - Fatigue performance testing machine for femoral component with handle - Google Patents
Fatigue performance testing machine for femoral component with handle Download PDFInfo
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- CN211904957U CN211904957U CN202020272249.9U CN202020272249U CN211904957U CN 211904957 U CN211904957 U CN 211904957U CN 202020272249 U CN202020272249 U CN 202020272249U CN 211904957 U CN211904957 U CN 211904957U
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- femoral component
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Abstract
A fatigue performance testing machine for femoral components with handles is characterized in that the upper end of a femur with a handle is clamped by a clamp, the lower end of the femur with the handle is inserted into a barrel, the femur with the handle is fixed after a medium is solidified into a medium layer by filling the medium in the barrel, a bathtub is sleeved outside the barrel, physiological saline is filled in the bathtub to immerse the femur with the handle into the physiological saline to realize simulation of human body environment, a movable beam driving mechanism drives a movable beam to move downwards under the guidance of a guide rod, and a load loading device continuously applies pressure load to the clamp according to a certain set frequency and force value, so that fatigue test is performed on the femur with the handle, and the test efficiency of the femur with the handle is.
Description
Technical Field
The utility model relates to a false body thighbone technical field, concretely relates to take shank thighbone part fatigue performance testing machine.
Background
The femoral stem implanted with the surgery is one of the femoral components of the hip joint prosthesis, is connected with the acetabular component of the hip joint prosthesis by being implanted into a femoral medullary cavity, and plays an important role in transferring the load of a human body and finishing the movement of the femur. The fatigue performance of the femoral stem determines the service life of the implanted femoral stem, and the fatigue performance is one of important contents for evaluating the safety and the effectiveness of the femoral stem. The quality inspection before the administration of the medicine is very important and is closely related to the physical rehabilitation of patients. Clinically, the adverse events of the suspected medical apparatus are mainly manifested by the abrasion, the looseness and the fracture of the femoral head.
Therefore, the mechanical properties such as fatigue strength of the femoral component have an important influence on the use of the femoral component, and the mechanical properties of durability thereof need to be strictly checked to ensure the reliability of the use thereof.
The femoral component includes a stem femoral component and a modular stem femoral component. The modular stem femoral component requires testing in simulated 37 ℃ saline. The prior art has no complete special auxiliary tool for the fatigue test.
An assistive device and a method for fatigue strength tests of femoral components are designed so as to scientifically and accurately detect the mechanical properties of the femoral components, and the assistive device and the method are problems which need to be solved at present.
Disclosure of Invention
The utility model discloses an overcome the not enough of above technique, provide a convenient testing machine that carries out the accurate detection of science of fatigue performance to taking handle thighbone.
The utility model overcomes the technical scheme that its technical problem adopted is:
a femoral component fatigue performance testing machine with a handle, comprising:
a guide rod is arranged at the upper end of the frame along the vertical direction;
the transverse sliding beam is slidably arranged on the guide rod, and a movable cross beam driving mechanism is arranged on the rack and used for driving the transverse sliding beam to slide up and down along the guide rod;
the clamp is used for clamping the head end of the femur with the handle;
the cylinder is arranged on the rack, a solidified medium layer is filled in the cylinder, and the lower end of the femur with the handle is fixed in the medium layer;
the bathtub is provided with an opening at the upper end, the lower end of the bathtub is sleeved on the barrel, the bathtub and the barrel are sealed through a sealing ring, and a containing cavity for containing normal saline is formed between the inner wall of the bathtub and the outer wall of the barrel; and the load loading device is arranged on the movable cross beam, and the pressure generating device applies downward pressure to the clamp through the pressure sensor.
Furthermore, above-mentioned travelling beam actuating mechanism includes the lead screw that sets up in both ends about the frame along vertical direction respectively, the lower extreme of lead screw passes through the bearing and rotates and install in the frame, and the transmission shaft passes through the horizontal rotation of belt seat bearing and installs in the frame, bevel gear II is installed to the lower extreme of lead screw, bevel gear I is installed respectively to the left and right sides of transmission shaft, bevel gear I meshes with the bevel gear II that the homonymy corresponds mutually, and the upper end and the travelling beam screw thread drive of lead screw are connected.
Furthermore, the load loading device is a servo electric cylinder vertically mounted on the movable cross beam, and the head end of a piston rod of the servo electric cylinder is connected with the pressure sensor.
In order to save labor and keep the saline water at a constant temperature, the bathtub is internally provided with a heating pipe.
For convenient operation, a handle is arranged on the outer side of the bathtub.
Preferably, the medium layer is made of a bone cement material.
In order to adjust the movable cross beam conveniently, a hand wheel is installed at the outer side end of the transmission shaft.
In order to prolong the service life, the movable cross beam is provided with a dust cover which is sleeved at the outer side end of the screw rod.
The utility model has the advantages that: the upper end of the femur with the handle is clamped by a clamp, the lower end of the femur with the handle is inserted into the cylinder, the femur with the handle is fixed after the medium is solidified into the medium layer by filling the medium in the cylinder, the bathtub is sleeved outside the cylinder, the femur with the handle is immersed in the normal saline to realize the simulation of the human body environment, the movable cross beam is driven by the movable cross beam driving mechanism to move downwards under the guidance of the guide rod, and the load loading device continuously applies pressure load to the clamp according to certain set frequency and force value, so that the fatigue test is performed on the femur with the handle, and the test efficiency of the femur with the handle is improved.
Drawings
Fig. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic view of the structure of the transmission shaft of the present invention;
FIG. 4 is a schematic structural view of a bathtub part of the present invention;
in the figure, the device comprises a frame 1, a guide rod 2, a moving beam 3, a servo electric cylinder 5, a pressure sensor 6, a clamp 7, a cylinder body 8, a bathtub 9, a hand wheel 10, a dust cover 11, a bearing 12 with a seat, a transmission shaft 13, a bevel gear I14, a lead screw 15, a bearing 16, a bevel gear II 17, a femur 18 with a handle, a heating pipe 19, a medium layer 20, a sealing ring 21 and a handle.
Detailed Description
The present invention will be further described with reference to fig. 1 to 4.
A femoral component fatigue performance testing machine with a handle, comprising: a guide rod 2 is arranged at the upper end of the frame 1 along the vertical direction; the transverse moving sliding beam 3 is slidably arranged on the guide rod 2, and a moving beam driving mechanism is arranged on the rack 1 and used for driving the transverse moving sliding beam 3 to slide up and down along the guide rod 2; a clamp 6 for clamping the head end of the femur 17 with a handle; the cylinder 7 is arranged on the frame 1, a solidified medium layer 19 is filled in the cylinder, and the lower end of the femur 17 with the handle is fixed in the medium layer 19; the bathtub 8 is provided with an opening at the upper end, the lower end of the bathtub 8 is sleeved on the barrel 7, the bathtub 8 and the barrel 7 are sealed through a sealing ring 20, and a containing cavity for containing normal saline is formed between the inner wall of the bathtub 8 and the outer wall of the barrel 7; and the load loading device is arranged on the movable beam 3, and the pressure generating device applies downward pressure to the clamp 6 through the pressure sensor 5. The upper end of a femur 17 with a handle is clamped by a clamp 6, the lower end of the femur 17 with the handle is inserted into a cylinder 7, the cylinder 7 is filled with a medium to solidify the medium into a medium layer 19, the femur 17 with the handle is fixed, a bathtub 8 is sleeved outside the cylinder 7, physiological saline is injected into the bathtub 8 to immerse the femur 17 with the handle into the physiological saline to realize simulation of human environment, a moving beam driving mechanism drives a moving beam 3 to move downwards under the guidance of a guide rod 2, and a load loading device continuously applies pressure load to the clamp 6 according to certain set frequency and force value, so that fatigue test is performed on the femur 17 with the handle, and the test efficiency of the femur 17 with the handle is improved. The pressure sensor 5 can detect the load force value applied by the load loading device, and the load can be conveniently adjusted to a set value.
The movable cross beam driving mechanism can be of a structure comprising lead screws 14 which are respectively arranged at the left end and the right end of a rack 1 along the vertical direction, the lower ends of the lead screws 14 are rotatably arranged in the rack through bearings 15, a transmission shaft 12 is horizontally and rotatably arranged in the rack 1 through a bearing 11 with a seat, a bevel gear II 16 is arranged at the lower end of each lead screw 14, bevel gears I13 are respectively arranged at the left side and the right side of the transmission shaft 12, the bevel gears I13 are meshed with the bevel gears II 16 corresponding to the same side, and the upper ends of the lead screws 14 are in threaded transmission connection with. The bevel gear I13 is driven to rotate by rotating the transmission shaft 12, and the bevel gear I13 is meshed with the bevel gear II 16, so that the two lead screws 14 are driven to rotate, and the movable beam 3 moves up and down under the guidance of the guide rod 2.
The load loading device can be a servo electric cylinder 4 vertically arranged on the movable beam 3, and the head end of a piston rod of the servo electric cylinder 4 is connected with the pressure sensor 5. When the servo electric cylinder 4 is operated, the piston rod is driven to extend at a certain frequency, so that a load is applied through the clamp 6.
Further, a heating pipe 18 is installed inside the bathtub 8. The heating pipe 18 can heat the normal saline in the bathtub 8 to keep the constant temperature at 37 +/-1 ℃ so as to simulate the human environment.
A handle 21 may be mounted to the outside of the tub 8. The bathtub 8 can be conveniently sleeved on the cylinder body 7 by the handle 21, or the bathtub 8 can be conveniently removed from the cylinder body 7.
Preferably, the media layer 19 is made of a bone cement material.
Preferably, the hand wheel 9 is mounted on the outer end of the transmission shaft 12. The hand wheel 9 can conveniently drive the transmission shaft 12 to rotate, and the convenience of operation is improved.
Furthermore, a dust cover 10 is arranged on the movable cross beam 3, and the dust cover 10 is sleeved at the outer side end of the screw rod 14. The dust cover 10 is arranged at the transmission connecting part of the screw 14 and the movable cross beam 3, so that dust can be prevented from entering the connecting part of the screw 14 and the movable cross beam 3, the smoothness of operation is improved, and the service life of the equipment is prolonged.
Claims (8)
1. A femoral component fatigue performance testing machine with a handle is characterized by comprising:
the upper end of the rack (1) is provided with a guide rod (2) along the vertical direction;
the movable cross beam (3) is slidably mounted on the guide rod (2), and a movable cross beam driving mechanism is arranged on the rack (1) and used for driving the movable cross beam (3) to slide up and down along the guide rod (2);
the clamp (6) is used for clamping the head end of the femur (17) with the handle;
the cylinder body (7) is arranged on the rack (1), a solidified medium layer (19) is filled in the cylinder body, and the lower end of the femur (17) with the handle is fixed in the medium layer (19);
the upper end of the bathtub (8) is opened, the lower end of the bathtub (8) is sleeved on the barrel body (7), the bathtub (8) and the barrel body (7) are sealed through a sealing ring (20), and a containing cavity for containing normal saline is formed between the inner wall of the bathtub (8) and the outer wall of the barrel body (7); and
and the load loading device is arranged on the movable cross beam (3), and the pressure generating device applies downward pressure to the clamp (6) through the pressure sensor (5).
2. The femoral component fatigue performance testing machine with stem of claim 1, characterized in that: the utility model discloses a portable beam is including setting up lead screw (14) at both ends about frame (1) along vertical direction respectively, the lower extreme of lead screw (14) passes through bearing (15) and rotates and installs in the frame, and transmission shaft (12) are installed in frame (1) through taking seat bearing (11) horizontal rotation, bevel gear II (16) are installed to the lower extreme of lead screw (14), bevel gear I (13) are installed respectively to the left and right sides of transmission shaft (12), bevel gear I (13) mesh with bevel gear II (16) that the homonymy corresponds mutually, and the upper end and portable beam (3) screw drive of lead screw (14) are connected.
3. The femoral component fatigue performance testing machine with stem of claim 1, characterized in that: the load loading device is a servo electric cylinder (4) vertically arranged on the movable cross beam (3), and the head end of a piston rod of the servo electric cylinder (4) is connected with the pressure sensor (5).
4. The femoral component fatigue performance testing machine with stem of claim 1, characterized in that: a heating pipe (18) is arranged in the bathtub (8).
5. The femoral component fatigue performance testing machine with stem of claim 1, characterized in that: a handle (21) is arranged on the outer side of the bathtub (8).
6. The femoral component fatigue performance testing machine with stem of claim 1, characterized in that: the medium layer (19) is made of a bone cement material.
7. The femoral component fatigue performance testing machine with stem of claim 2, characterized in that: and a hand wheel (9) is arranged at the outer side end of the transmission shaft (12).
8. The femoral component fatigue performance testing machine with stem of claim 2, characterized in that: the movable cross beam (3) is provided with a dust cover (10), and the dust cover (10) is sleeved at the outer side end of the screw rod (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020272249.9U CN211904957U (en) | 2020-03-09 | 2020-03-09 | Fatigue performance testing machine for femoral component with handle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020272249.9U CN211904957U (en) | 2020-03-09 | 2020-03-09 | Fatigue performance testing machine for femoral component with handle |
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| CN211904957U true CN211904957U (en) | 2020-11-10 |
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| CN202020272249.9U Active CN211904957U (en) | 2020-03-09 | 2020-03-09 | Fatigue performance testing machine for femoral component with handle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557222A (en) * | 2020-12-25 | 2021-03-26 | 中国计量大学 | Fatigue test method and fatigue test device for polyether-ether-ketone artificial spinal fusion cage |
| CN112816326A (en) * | 2021-01-25 | 2021-05-18 | 济南恒瑞金试验机有限公司 | Tool for testing biomechanical property of interbody fusion cage, testing machine and testing method |
| CN114112746A (en) * | 2021-11-14 | 2022-03-01 | 合肥熠品医学科技有限公司 | Hip joint femoral stem fatigue test loading device |
-
2020
- 2020-03-09 CN CN202020272249.9U patent/CN211904957U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557222A (en) * | 2020-12-25 | 2021-03-26 | 中国计量大学 | Fatigue test method and fatigue test device for polyether-ether-ketone artificial spinal fusion cage |
| CN112816326A (en) * | 2021-01-25 | 2021-05-18 | 济南恒瑞金试验机有限公司 | Tool for testing biomechanical property of interbody fusion cage, testing machine and testing method |
| CN114112746A (en) * | 2021-11-14 | 2022-03-01 | 合肥熠品医学科技有限公司 | Hip joint femoral stem fatigue test loading device |
| CN114112746B (en) * | 2021-11-14 | 2022-07-08 | 合肥熠品医药科技有限公司 | Hip joint femoral stem fatigue test loading device |
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