CN102871778B - Multi-workbench detecting and experimenting device for artificial hip joint abrasion - Google Patents

Abstract

The invention discloses a multi-workbench detecting and experimenting device for artificial hip joint abrasion. The multi-workbench detecting and experimenting device for artificial hip joint abrasion comprises a frame, an artificial hip joint driver and a controller. The artificial hip joint driver which is an artificial hip joint motion synthesizing mechanism comprises an artificial hip joint simulating workbench module, a tester workbench transmission module and a tester workbench loading module. Actual application conditions of the artificial hip joint can be reproduced authentically and reliably and abrasive particles similar to actual applications can be generated. The detecting and experimenting device has multiple workbenches, driven by a single motor, for testing a plurality of artificial hip joints simultaneously and has high compatibility, and is applicable to experiments on different specifications of artificial hip joints, high in work efficiency, low in manufacturing cost, and easy to operate.

Description

Multi-table artificial hip joint wear detection experimental device

technical field

The invention relates to an analysis and test platform, in particular to a wear detection experimental device, which can evaluate the friction and wear of an artificial prosthesis, that is, an artificial hip joint.

Background technique

At present, artificial joints are widely used in the late treatment of arthritis, traumatic disability and osteoma resection, and have become a routine surgical operation. The replacement of artificial joints includes the replacement of hips, knees, shoulders, elbows, wrists and other joints. Among them, the hip and knee joints are the main stress and wear parts of the human body, and the damage rate is high, so the operation is mainly based on them. In my country, about 30 million people need artificial joint replacement, currently there are only 30,000 sets, of which imported products account for about 1/4 of the market, and it is estimated that 1 to 1.5 million osteoarthritis patients in China need artificial joint replacement every year Surgery, the annual growth rate is about 25% or more. With the development of medicine, the demand for artificial joints will increase.

In the practical application of artificial joints, the friction and wear of the joints is one of the main problems, including the wear of the artificial joints themselves in service, and the abrasive particles after the wear of the friction pair materials cause foreign body reactions around the joints, causing joint loosening, and eventually lead to artificial joints. Joint failure. The research on friction, wear and lubrication of artificial hip joints is mainly divided into in vivo research and in vitro simulation experiment research. In vivo research is to observe and analyze the wear and tear of the joints through surgery and dissection after the artificial joints are implanted in the animals for a period of time. The in vitro simulation experiment research mainly uses the artificial hip joint simulation experiment machine as the carrier to analyze and study the friction and wear of the artificial hip joint by simulating the complex motion of the hip joint. Because the in vivo experiment process is more complicated, and the experiment risk is high, the cost is high, and the cycle is long, so compared with the in vivo experiment, the in vitro experiment is because the experiment process is relatively simple, easy to observe and analyze, there are fewer experimental interference factors, and the cost is low. , has been widely promoted and used. The difficulty of the in vitro simulation experiment lies in the fact that there is a certain movement difference between the artificial hip joint in actual use and the joint in the simulation experiment, that is, the degree of reduction to the real situation. The existing in vitro simulation test machines cannot meet the evaluation requirements for the friction and wear properties of new materials for artificial hip joints. Most of them are single-table, which cannot well meet multiple artificial hip joints with different specifications and precision requirements. Test, reliability is not high, and its technical solution is not ideal enough.

Contents of the invention

In order to solve the problems in the prior art, the object of the present invention is to provide a multi-table artificial hip joint wear detection experimental device, which has strong compatibility, provides an operating platform for artificial hip joint experiments, and is low in cost and easy to operate. Not only can it truly simulate but also analyze and study related materials. In addition, the simulated experiment of the device of the present invention produces similar or even the same shape of abrasive grains as in the actual human body application process. realistic and scientific.

In order to achieve the above-mentioned purpose of the invention, design of the present invention is:

The multi-table artificial hip joint wear detection experimental device of the present invention includes a machine frame, an artificial hip joint simulation workbench module, a test machine workbench transmission module and a test machine workbench loading module. The artificial hip joint simulation workbench module is composed of inclined support brackets, inclined bearing sleeves and femoral ball swing lower tray parts, which are mainly connected by cross roller bearings, so as to ensure the relative movement between the support and the tray, multi-table device Driven by a single motor, it forms a human-like hip joint movement. That is, the middle beam on the machine frame rotates and inserts a rotating tray through the plane bearing; the rotating shaft extending downward of the rotating tray is connected with the variable speed motor through a set of eccentric transmission modules, and the upper tray is connected with the lower part of the experimental module. The turntable fixture is connected; there is a set of loading modules on the top of the machine frame, and a loading pressure column is fixedly connected to the center, and a load sensor is added to the middle of the pressure column, and the loading pressure column is connected to the electromechanical loading system of the experimental module.

According to above-mentioned inventive design, the present invention adopts following technical scheme:

A multi-table artificial hip joint wear detection experimental device, including a machine frame, an artificial hip joint driving device and a controller, the artificial hip joint driving device is fixed on the machine frame, and the artificial hip joint is composed of artificial hip joints that cooperate spherically with each other The ball socket and the artificial femur ball constitute a motion pair, and the controller controls the artificial hip joint driving device to output driving force to the artificial hip joint ball socket and the artificial femoral ball respectively. The artificial hip joint driving device is the motion synthesis mechanism of the artificial hip joint, including the artificial hip The joint simulation workbench module, the test machine workbench transmission module and the test machine workbench loading module, the artificial hip joint is arranged between the artificial hip joint simulation workbench module and the test machine workbench loading module, and the artificial hip joint simulation workbench includes at least Two groups, respectively corresponding to each artificial hip joint, each group of artificial hip joint simulation workbench modules are fixed on the machine frame through a combination of thrust ball bearings and angular contact ball bearings, and simulate the work of the artificial hip joint during the movement of the artificial hip joint. The axial and radial movement of the bench is positioned, and the driven end of the bottom of each group of artificial hip joint simulation table is also connected to the power output end of the transmission module of the testing machine table through elastic couplings, and the controller controls the testing machine. The workbench transmission module drives the artificial hip joint simulation workbench to rotate, and then drives the artificial femur ball to rotate. The test machine workbench loading module is arranged on the top of the machine frame. Corresponding to the hip joint, the controller also controls the loading module of the testing machine workbench to axially load the ball socket of the artificial hip joint. The linear bearing guide bush is fixed on the top horizontal frame of the machine frame, and the linear bearing guide bush is aligned with the test machine workbench. The radial movement of the loading module is positioned, and the stroke of the axial movement of the loading module of the testing machine table is limited.

The above-mentioned artificial hip joint simulation workbench module includes the femoral ball upper tray, the femoral ball lower tray, the rotating tray and the inclined support bracket, the femoral ball upper tray and the femoral ball lower tray are fastened and connected by bolts, and the artificial hip joint is set in the lubricant container In the process, the lubricating fluid container and the upper tray of the femoral ball are tightly fitted and fixed, and the center of the upper tray of the femoral ball is fixedly connected with the bottom end of the artificial femoral ball bearing through a tapered blind hole, and the top end of the artificial femoral ball bearing is connected with the artificial femoral ball bearing. The artificial femoral ball is fixedly connected, the bottom of the rotating tray is fixedly connected to the top of the inclined support bracket, the upper surface slope of the inclined support bracket and the lower tray of the femoral ball are connected and fixed through cross roller bearings and cross roller bearing bushings, The inner ring fixed end cover of the cross roller bearing is fixed by bolt connection, the outer ring fixed end cover of the cross roller bearing is fixed by bolt connection and the lower tray of the femoral ball is fixed, and the bottom of the rotating tray is also fixedly connected with a short step The transmission shaft, the short-step transmission shaft is directly connected with the elastic coupling for power transmission, and the artificial hip joint simulation workbench module drives the artificial hip joint to produce a synthetic motion similar to the flexion and lateral swing of the human hip joint.

The transmission module of the above-mentioned testing machine workbench includes an underframe, an eccentric turntable, a variable speed motor and a crankshaft. All the cranks are composed of an upper half and a lower half. The eccentric turntable is located above the underframe, and the underframe is fixed on the frame of the machine. Above, the lower part of the chassis platform is fixedly connected and installed through the external frame part of the variable speed motor of the motor bracket. The transmission shaft of the variable speed motor is fixedly connected with the bottom end of a lower long crank through a coupling, and the controller also controls the transmission of the variable speed motor to the eccentric turntable. Power, the upper part of the lower long crank is rotationally connected and positioned with the eccentric turntable through angular contact ball bearings, and the lower half of the lower long crank is also rotationally connected and positioned with the lower crank bearing hole of the chassis platform through another angular contact ball bearing , there is also a lower short crank for positioning the eccentric turntable, the lower short crank is also rotationally connected and positioned with the chassis platform and the eccentric turntable through angular contact ball bearings, and there are at least two upper crank bearing holes on the eccentric turntable, the upper The upper crank is installed and positioned through the deep groove ball bearing in the crank bearing hole, and the end faces of the lower crank bearing hole and the upper crank bearing hole are equipped with bearing end covers to restrict the axial movement of the bearing, and the upper half of the upper crank is fixed with the elastic coupling connect.

The loading module of the testing machine workbench includes an electromechanical loader, a loading shaft, a universal coupling and a cup holder, and the loading shaft also includes at least two, and the linear bearing guide sleeve is fixedly connected to the machine frame. The linear bearing guide sleeve slides axially, the electromechanical loader is also fixed on the machine frame, the external fixed connection frame of the cup holder is fixedly connected with one end of the universal coupling, and the artificial hip joint ball socket is installed on the cup socket In the cage, the controller also controls the electromechanical loader to apply load through the loading shaft, and the loading shaft transmits the load applied by the electromechanical loader to the cup and socket cage through the universal coupling, so that the artificial hip joint acts on the external Under the load, there is also a load sensor between the loading shaft and the universal coupling. The upper part of the load sensor is fixedly connected with the bottom of the loading shaft, and the lower part of the load sensor is connected to the universal coupling through a threaded pin. The top end of the load cell is fixedly connected, and the signal output end of the load sensor is connected with the signal input end of the controller.

The above-mentioned artificial hip joint simulation table preferably includes 3 groups, and the upper crank also preferably includes 3 groups.

The slope angle of the above-mentioned inclined plane support bracket 13 is 20°-30°.

As an improvement of the present invention, a brake lever is installed on the side of the lower tray of the femoral ball through threaded connection, and the brake lever rotates with the lower tray of the femoral ball. When going up, the rotation of the lower tray of the femoral ball due to the friction between the artificial hip joint socket and the artificial femoral ball is limited.

Compared with the prior art, the present invention has the following obvious outstanding substantive features and significant advantages:

1. The experimental device of the present invention is used for artificial hip joint simulation experiments, and can truly and reliably reproduce the situation of artificial hip joints in practical applications. It is a multi-working platform driven by a single motor, and can test multiple artificial hip joints at the same time. Strong compatibility, providing multi-working platforms for artificial hip joints, capable of providing testing services for multiple artificial hip joints at the same time, suitable for experiments with different specifications of artificial hip joints, and high work efficiency;

2. It can truly and reliably reproduce the situation of artificial hip joints in practical applications, and produce abrasive particles similar to those in practical applications, that is, the size and shape of abrasive particles produced in the experimental machine must be consistent with those in reality;

3. It can support the lubrication test experiments of different types of synovial fluids, and analyze and compare the situation of different abrasive particles in different synovial fluids;

4. The synthetic motion method is simple, and the simple reciprocating motion will produce smaller abrasive particles, which is helpful to analyze and compare the relationship between the motion of the artificial hip joint and the size and quantity of abrasive particles;

5. Low manufacturing cost, low maintenance cost, high experimental reliability, easy operation, convenient loading and unloading.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of a multi-table artificial hip joint wear detection experimental device according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the module structure of the artificial hip joint simulation workbench according to the first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of the transmission module of the testing machine workbench according to the first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the loading module of the testing machine workbench according to the first embodiment of the present invention.

Fig. 5 is a schematic diagram of the overall structure of an experimental device for detecting wear of a multi-worktable artificial hip joint according to Embodiment 2 of the present invention.

Fig. 6 is a schematic diagram of the module structure of the artificial hip joint simulation workbench according to the second embodiment of the present invention.

Detailed ways

In conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail as follows:

Embodiment one:

Referring to Figures 1 to 4, a multi-table artificial hip joint wear detection experimental device includes a machine frame 1, an artificial hip joint driving device and a controller, the artificial hip joint driving device is fixed on the machine frame 1, and the artificial hip joint The joint consists of artificial hip joint ball socket 7 and artificial femoral ball 8 that cooperate with each other to form a kinematic pair. The device is a motion synthesis mechanism for an artificial hip joint, including an artificial hip joint simulation workbench module 9, a testing machine workbench transmission module 2 and a testing machine workbench loading module 6, and the artificial hip joint is set on the artificial hip joint simulation workbench module 9 and Between the testing machine workbench loading modules 6, the artificial hip joint simulation workbench 9 includes 3 groups, which correspond to each artificial hip joint respectively, and each group of artificial hip joint simulation workbench 9 modules pass through the thrust ball bearing 4 and the angular contact ball bearing The 3 combinations are fixed on the machine frame 1, and the axial and radial movements of the artificial hip joint simulation table 9 are positioned during the artificial hip joint movement, and the driven ends at the bottom of the artificial hip joint simulation table 9 of each group are also The elastic coupling 10 is respectively connected to the power output end of the test machine workbench transmission module 2, and the controller controls the test machine workbench transmission module 2 to drive the artificial hip joint simulation workbench 9 to rotate, and then drives the artificial femur ball 8 to rotate. The testing machine workbench loading module 6 is arranged on the top of the machine platform frame 1. The testing machine workbench loading module 6 also includes 3 groups, corresponding to each artificial hip joint respectively. The controller also controls the testing machine workbench loading module 6 pairs of artificial hip joints. The ball socket 7 carries out axial loading, and the linear bearing guide sleeve 5 is fixedly installed on the top horizontal frame of the machine frame 1. The linear bearing guide sleeve 5 positions the radial movement of the loading module 6 of the testing machine workbench and limits the working of the testing machine. The stroke of the axial movement of the stage loading module 6. This embodiment can be used in artificial hip joint friction experiments, can truly and reliably reproduce the situation of artificial hip joints in practical applications, and produce abrasive particles similar to those in practical applications, that is, the size of abrasive particles produced in the experimental machine , The shape must be consistent with the actual one. It can evaluate the friction and wear of artificial hip joints, and has the characteristics of high test efficiency, low manufacturing cost, and easy operation.

Referring to Fig. 2, in the present embodiment, artificial hip joint simulation workbench module 9 comprises tray 19 on femoral ball, tray 15, rotating tray 11 and inclined-plane support holder 13 on femoral ball, tray 19 and lower femoral ball The tray 15 is fastened and connected by bolts to form a turntable fixture mechanism. The artificial hip joint is set in the lubricating fluid container 17, and the lubricating fluid container 17 and the upper tray 19 of the femoral ball are tightly fitted and fixed, which can support the lubrication of different types of synovial fluid. Test experiment, analyze and compare the situation of different abrasive particles in different synovial fluids, the center of the tray 19 on the femoral ball is fixedly connected with the bottom end of the artificial femoral ball bearing 18 through the tapered blind hole, and the top of the artificial femoral ball bearing 18 It is fixedly connected with the artificial femoral ball 8, and the bottom of the rotating tray 11 is fixedly connected with the top of the inclined support bracket 13, and the slope angle of the inclined support bracket 13 is 23°. The inclined surface on the upper surface of the support bracket 13 is connected and fixed with the lower tray 15 of the femoral ball through the cross roller bearing 14 and the cross roller bearing sleeve 21, and the cross roller bearing sleeve 21 is connected with bolts to fix the cross roller bearing 14 The fixed end cap 16 of the inner ring of the cross roller bearing 14, the fixed end cap 20 of the outer ring of the cross roller bearing 14 are connected by bolts to fix the lower tray 15 of the femoral ball, and the bottom of the rotating tray 11 is also fixedly connected with a short stepped drive shaft at one end, and the short stepped drive shaft is directly connected to the The elastic coupling 10 is fastened and connected for power transmission, and the artificial hip joint simulation workbench module 9 drives the artificial hip joint to produce a synthetic motion similar to the flexion and lateral swing of the human hip joint. The experimental device of this embodiment is used for artificial hip joint simulation experiments, and can truly and reliably reproduce the situation of artificial hip joints in practical applications.

Referring to Fig. 3, in the present embodiment, the testing machine workbench transmission module 2 comprises an underframe platform 23, an eccentric turntable 28, a variable speed motor 36 and a crankshaft, and all cranks are combined by an upper half 34 and a lower half 30, The eccentric turntable 28 is positioned above the underframe platform 23, and the underframe platform 23 is fixed on the machine frame 1. The bottom of the underframe platform 23 is fixedly connected and installed with the external frame part of the variable speed motor 36 through the motor bracket 22, and the transmission spindle of the variable speed motor 36 passes through The coupling 27 is fixedly connected to the bottom end of a lower long crank 25, and the controller also controls the variable speed motor 36 to transmit power to the eccentric turntable 28, and the upper part 34 of the lower long crank 25 is connected to the eccentric turntable 28 through the angular contact ball bearing 24. Rotation connection and positioning, the lower part 30 of the lower long crank 25 is also rotationally connected and positioned with the lower crank bearing hole 35 of the chassis platform 23 through another angular contact ball bearing 24, and a lower short crank 32 is also provided for positioning the eccentric The turntable 28 and the lower short crank 32 are also rotationally connected and positioned with the underframe 23 and the eccentric turntable 28 through angular contact ball bearings 24. The eccentric turntable is also provided with three upper crank bearing holes 33, and the upper crank bearing holes 33 pass deep The groove ball bearing 29 is installed and positioned on the upper crank 31, and the end faces of the lower crank bearing hole 35 and the upper crank bearing hole 33 are provided with bearing end covers 26 to constrain the axial movement of the bearing, and the upper half 34 of the upper crank 31 is connected with the elastic coupling 10 fixed connections.

In this embodiment, the transmission module 2 of the testing machine workbench is a plane connecting rod transmission device, which is composed of an eccentric turntable 28 and a combined crank; The turntable 28 is provided with a crank hole, the crank hole is fixed with the outer ring of the bearing, and the combined crank is inserted in the bearing, and the crank is connected to the bearing on the chassis platform 23. The bearing pair is used to fix the eccentric turntable 28, and the crank shaft is connected to the coupling The device 27 is also connected with the variable speed motor 36; the structure of the connection between the test machine workbench transmission module 2 and the artificial hip joint simulation workbench module 9 is: deep groove ball bearings 29 are housed in 3 holes on the eccentric turntable 28, deep groove ball bearings The top crank 31 is inserted in 29, and the upper end of the top crank 31 is provided with an elastic coupling 10, and the elastic coupling 10 is fixedly connected with the rotating tray 11. The synthetic motion method is simple, and the simple reciprocating motion will produce smaller abrasive particles, which is helpful to analyze and compare the relationship between the motion of the artificial hip joint and the size and quantity of abrasive particles.

Referring to Fig. 4, in this embodiment, the testing machine workbench loading module 6 includes an electromechanical loader 43, a loading shaft 42, a universal coupling 39, and a cup holder 37, and the loading shaft 42 also includes three, linear The bearing guide sleeve 5 is fixedly connected to the machine frame 1, the loading shaft 42 slides axially in the linear bearing guide sleeve 5, the electromechanical loader 43 is also fixed on the machine frame 1, and the external of the cup holder 37 is fixedly connected to The frame 38 is fixedly connected with one end of the universal coupling 39, and the artificial hip joint ball socket 7 is installed in the socket cage 37, and the controller also controls the electromechanical loader 43 to apply load through the loading shaft 42, and the loading shaft 42 passes through the universal shaft 42. The load applied by the electromechanical loader 43 is transmitted to the cup holder 37 by the axial coupling 39, so that the artificial hip joint acts under the applied load. There is also a set between the loading shaft 42 and the universal coupling 39. Load sensor 41, the top of load sensor 41 is fixedly connected with the bottom of loading shaft 42, the bottom of load sensor 41 is fixedly connected with the top of universal coupling 39 by a threaded pin 40, the signal output end of load sensor 41 and Connect to the signal input terminal of the controller. In this embodiment, the cup socket holder 37 and the femoral ball upper tray 19 form a short cylindrical artificial hip joint cup socket fixture, the loading shaft 42 and the universal coupling 39 form a loading and pressing column, and the testing machine workbench The loading module 6 is a combined loading device with a load sensor 41 .

The working principle of this embodiment is as follows:

Referring to Figures 1 to 4, in the workbench transmission module 2 of the testing machine, the variable speed motor 36 drives the eccentric turntable 28 to produce eccentric circumferential rotation, and the three upper cranks 31 on the eccentric turntable 28 synchronously drive the artificial hip joint simulation workbench module 9 The upper rotating tray 10 and the inclined-plane supporting bracket 13 rotate in the circumferential direction, and at the same time, because the inclined-plane supporting bracket 13 and the lower tray 15 of the femoral ball are connected through the cross roller bearing 14, the degree of freedom of relative rotation between the two is increased, thereby bringing The upper tray 19 of the femoral ball and the artificial femoral ball 8 fixed thereon produce a swinging flexion similar to that of the human hip joint in the range perpendicular to the rotation plane, and the amplitude depends on the slope angle of the inclined support bracket 13, artificially The hip joint ball socket 7 is installed in the cup socket holder 37, and is fixedly connected with the artificial femoral ball 8. The artificial hip joint mechanism composed of the artificial femoral ball 8 and the artificial hip joint ball socket 7 is mainly adjusted by adjusting the artificial femoral ball bearing. 18, the loading module 6 of the testing machine workbench is mainly used for the application of dynamic variable force load, and the variable load is generated by the electromechanical loader 43, and is applied to the artificial femoral ball 8 and the artificial hip joint ball socket 7, so as to wear The test evaluates friction and wear conditions.

Embodiment two:

The technical solution of this embodiment is basically the same as that of Embodiment 1, especially in that:

Referring to Fig. 5 and Fig. 6, the brake lever 12 is installed on the side of the tray 15 under the femoral ball through threaded connection, and the brake lever 12 rotates with the tray 15 under the femoral ball. When the upright bar of the frame 1 is above, the rotation of the lower tray 15 of the femoral ball due to the friction between the artificial hip joint socket 7 and the artificial femoral ball 8 is limited.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can also be made according to the purpose of the invention of the present invention. All changes, modifications, substitutions, combinations, and simplifications made according to the spirit and principle of the technical solution of the present invention should be equivalent replacement methods, as long as they meet the purpose of the present invention, as long as they do not deviate from the multi-workbench artificial The technical principles and inventive concepts of the hip joint wear detection experimental device all belong to the protection scope of the present invention.

Claims (9)

1. A multi-table artificial hip joint wear detection experimental device, including a machine frame (1), an artificial hip joint driving device and a controller, and the artificial hip joint driving device is fixed on the machine frame (1) , the artificial hip joint consists of an artificial hip joint ball socket (7) and an artificial femoral ball (8) that cooperate spherically with each other to form a kinematic pair, and the controller controls the artificial hip joint driving device to move to the artificial hip joint ball socket (7) ) and the artificial femoral ball (8) respectively output driving force, characterized in that: the artificial hip joint driving device is a motion synthesis mechanism of artificial hip joint, including artificial hip joint simulation workbench module (9), testing machine working table transmission module (2) and testing machine workbench loading module (6), and the artificial hip joint is set between the artificial hip joint simulation workbench module (9) and the testing machine workbench loading module (6). The artificial hip joint simulation workbench module (9) includes at least two groups, respectively corresponding to each artificial hip joint, and the artificial hip joint simulation workbench module (9) of each group is passed through the thrust ball bearing (4) and angular contact Ball bearings (3) are combined and fixed on the machine frame (1), and the axial and radial movement of the artificial hip joint simulation workbench module (9) is positioned when the artificial hip joint moves. The driven end at the bottom of the artificial hip joint simulation workbench module (9) is also connected to the power output end of the test machine workbench transmission module (2) through an elastic coupling (10), and the controller controls The testing machine workbench transmission module (2) drives the artificial hip joint simulation workbench module (9) to rotate, and then drives the artificial femoral ball (8) to rotate, and the testing machine workbench loading module (6) sets On the top of the machine frame (1), the testing machine workbench loading module (6) also includes at least two groups, corresponding to each artificial hip joint, and the controller also controls the loading of the testing machine workbench. The module (6) carries out axial loading on the artificial hip joint ball socket (7), and a linear bearing guide sleeve (5) is fixedly installed on the top horizontal frame of the machine frame (1), and the linear bearing guide sleeve (5) Positioning the radial movement of the loading module (6) of the testing machine workbench, and limiting the stroke of the axial movement of the loading module (6) of the testing machine workbench. 2. The multi-table artificial hip joint wear detection experimental device according to claim 1, characterized in that: the artificial hip joint simulation workbench module (9) includes a femoral ball upper tray (19), a femoral ball lower tray ( 15), the rotating tray (11) and the inclined support bracket (13), the femoral ball upper tray (19) and the femoral ball lower tray (15) are fastened and connected by bolts, and the artificial hip joint is set in the lubricating fluid container In (17), the lubricating fluid container (17) and the upper tray of the femoral ball (19) are closely fitted and sealed, and the center of the upper tray (19) of the femoral ball is connected with the artificial The bottom end of the femoral ball bearing (18) is fixedly connected, the top end of the artificial femoral ball bearing (18) is fixedly connected to the artificial femoral ball (8), and the bottom of the rotating tray (11) is connected to the inclined surface The top of the support bracket (13) is fixedly connected, and the upper surface slope of the inclined support bracket (13) is connected to the lower tray of the femoral ball (15) through the cross roller bearing (14) and the cross roller bearing bushing ( 21) To connect and fix, the cross roller bearing sleeve (21) uses bolts to fix the inner ring fixed end cover (16) of the cross roller bearing (14), and the cross roller bearing (14) The outer ring of the fixed end cover (20) is connected with bolts to fix the lower tray (15) of the femoral ball, and the bottom of the rotating tray (11) is also fixedly connected to a short stepped drive shaft at one end, and the short stepped drive shaft is directly connected to the The elastic coupling (10) is fastened and connected for power transmission, and the artificial hip joint simulation workbench module (9) drives the artificial hip joint to produce a synthetic motion similar to the flexion and lateral swing of the human hip joint. 3. The multi-table artificial hip joint wear detection experimental device according to claim 2, characterized in that: the transmission module (2) of the testing machine table includes an underframe (23), an eccentric turntable (28), a variable speed motor (36) and cranks, all cranks are combined by the upper half (34) and the lower half (30), the eccentric turntable (28) is located above the chassis platform (23), the chassis platform (23) is fixed on the machine frame (1), and the lower part of the underframe (23) is fixedly connected and installed with the outer frame part of the variable speed motor (36) through the motor bracket (22), and the variable speed motor ( 36) The drive shaft is fixedly connected to the bottom end of a lower long crank (25) through a coupling (27), and the controller also controls the variable speed motor (36) to transmit power to the eccentric turntable (28), The upper half (34) of the lower long crank (25) is rotationally connected and positioned with the eccentric turntable (28) through angular contact ball bearings (24), and the lower half (30) of the lower long crank (25) In addition, the angular contact ball bearing (24) is rotationally connected and positioned with the lower crank bearing hole (35) of the chassis (23), and a lower short crank (32) is also provided for positioning the eccentric The turntable (28), the lower short crank (32) is also rotationally connected and positioned with the chassis platform (23) and the eccentric turntable (28) through angular contact ball bearings (24), and the eccentric turntable has at least Also be provided with two upper crank bearing holes (33), the upper crank (31) is installed and positioned through the deep groove ball bearing (29) in the described upper crank bearing hole (33), the lower crank bearing hole (35) and the upper The end faces of the crank bearing holes (33) are provided with bearing end covers (26) to constrain the axial movement of the bearings, and the upper half (34) of the upper crank (31) is fixedly connected with the elastic coupling (10) . 4. The multi-table artificial hip joint wear detection experimental device according to claim 2 or 3, characterized in that: the testing machine table loading module (6) includes an electromechanical loader (43), a loading shaft (42) , a universal coupling (39) and a cup holder (37), the loading shaft (42) also includes at least two, and the linear bearing guide sleeve (5) is fixedly connected to the machine frame (1) , the loading shaft (42) slides axially in the linear bearing guide sleeve (5), the electromechanical loader (43) is also fixed on the machine frame (1), and the cup The external fixed connection frame (38) of the cage (37) is fixedly connected with one end of the universal coupling (39), and the artificial hip joint ball socket (7) is installed on the socket cage (37) Inside, the controller also controls the electromechanical loader (43) to apply load through the loading shaft (42), and the loading shaft (42) connects the electromechanical loader ( 43) The applied load is transmitted to the cup holder (37), so that the artificial hip joint acts under the external load, and there is also a load between the loading shaft (42) and the universal coupling (39) sensor (41), the upper part of the load sensor (41) is fixedly connected to the bottom of the loading shaft (42), and the lower part of the load sensor (41) is connected to the universal coupling through a threaded pin (40) The top end of the sensor (39) is fixedly connected, and the signal output end of the load sensor (41) is connected with the signal input end of the controller. 5. The multi-table artificial hip joint wear detection experimental device according to claim 2 or 3, characterized in that: a brake rod (12) is installed on the side of the tray (15) under the femoral ball through threaded connection, so that The brake lever (12) rotates with the lower tray of the femoral ball (15), when the free end of the brake lever (12) abuts against the column bar of the machine frame (1) , to limit the rotation of the tray under the femoral ball (15) due to the friction between the artificial hip joint socket (7) and the artificial femoral ball (8). 6. The multi-table artificial hip joint wear detection experimental device according to claim 2 or 3, characterized in that: the artificial hip joint simulation workbench module (9) includes 3 groups, and the upper crank (31) includes 3 groups indivual. 7. The multi-table artificial hip joint wear detection experimental device according to claim 4, characterized in that: the artificial hip joint simulation workbench modules (9) include 3 groups, and the upper crank (31) includes 3 sets. 8. The multi-table artificial hip joint wear detection experimental device according to claim 2 or 3, characterized in that: the slope angle of the inclined support bracket (13) is 20°-30°. 9. The multi-table artificial hip joint wear detection experimental device according to claim 4, characterized in that: the slope angle of the inclined support bracket (13) is 20°-30°.