WO2013113199A1

WO2013113199A1 - Gas cylinder self-resetting-type hip-joint testing machine

Info

Publication number: WO2013113199A1
Application number: PCT/CN2012/076436
Authority: WO
Inventors: 刘金龙; 陈煊; 程刚
Original assignee: 中国矿业大学
Priority date: 2012-02-01
Filing date: 2012-06-04
Publication date: 2013-08-08
Also published as: CN102525691B; CN102525691A

Abstract

Disclosed is a gas cylinder self-resetting-type hip-joint testing machine, comprising a frame constituted of a top plate (31), a base plate (2) and a strut (15). A support frame (14) is provided in the frame, and a drive shaft (60) is fixed in the support frame (14). A lower cam wheel (5), a turbine (17), a central cam wheel (57) and an upper cam wheel (56) are successively provided on the drive shaft (60). A bearing seat with an arcuate surface is provided above the support frame (14) and a base with a spherical surface (53) is provided on the bearing seat with an arcuate surface and fits with the arcuate surface. A solution tray (26) is provided on the base with a spherical surface (53), and an articulation head ball seat (52) embedded in the base with a spherical surface (53) is provided in the solution tray (26). A movable platform (29) is provided on the solution tray (26) and is fixed to a tray edge thereof. The movable platform (29) is connected via a steel cable traction device and a pneumatic drive mechanism to the three cam wheels (5, 57, 56), respectively. A hydraulic cylinder (37) is provided on the top plate (31) with a piston rod of the hydraulic cylinder (37) passing through the top plate (31). A temperature controller (42) controlling the temperature in the solution tray (26) is provided on the top plate (31) and a ball push pin (8) is provided on the base plate (2) with the top of the ball push pin on the drive shaft (60). The testing machine has a compact structure, is low in cost, is convenient to operate, and can accurately simulate the actual movement of a human hip-joint in the environment of a testing room.

Description

Cylinder self-resetting hip joint testing machine

Technical field

The invention relates to an artificial joint testing machine, in particular to a cylinder self-resetting type capable of correctly simulating the actual moving condition of a human hip joint in a laboratory environment and reliably testing the biotribological characteristic parameters of the artificial joint material. Hip test machine.

Background technique

As human society enters the aging stage, various age-related joint diseases, such as thigh bone fractures and arthritis, will occur in large numbers, so the demand for artificial joints will increase. At present, about 30 million people have implanted artificial joints around the world, and the annual replacement capacity is about 2 million. Artificial joints are quite harsh in the body, such as artificial hip joints, which are subject to annual Load shock and wear that may be several times the weight of the human body. At the same time, since the bones of normal people constantly adjust their appearance in the complex balance of osteoblasts and osteoblasts, the debris from the friction surface of the prosthesis accumulates near the joints, which will increase the number of bone marrow cells in the body and break the bones. The balance between cells and osteoblasts loosens the prosthesis, so wear and wear particle spreading is still a major problem affecting the durability of artificial hip joints. The artificial joint testing machine performs friction and wear tests on artificial joint materials, and analyzes the friction and wear properties of artificial joint materials through experimental data, which has important practical significance for improving the quality of artificial joints, prolonging their clinical life and reducing patient suffering.

At present, the hip joint testing machine can be roughly divided into three categories according to the different motion modes: (1) Biaxial-Hip-Simulator; (2) Pin-on-Disk; 3) Multi-Hip-Simulator. The pendulum type mainly relies on the relative motion between the base and the bevel base to simulate the swinging motion of the hip joint in three different planes. Swing-axis HUT-BRM developed by Helsinki University of Technology Hip-joint The simulator test machine, due to the limitations of the conditions, the designer omitted the motion in the cross section. The first generation of artificial hip joint simulator designed and manufactured by the Institute of Tribology and Reliability Engineering of China University of Mining and Technology is also a pendulum type test machine according to the structure and motion principle. The pin-type friction and wear tester is a conventional test equipment for artificial joint friction. The friction and wear test is carried out by sliding contact, and the frictional performance of the material is studied by the relative motion formed between the disk and the test sample processed into a pin shape. The lubricating properties of synovial fluid usually adopt three kinds of contact methods, but the contact mode of this kind of testing machine is different from the movement mode of human hip joint. The multi-axis type mainly simulates the motion pattern of the artificial hip joint by synthesizing a single motion formed by different shaft systems. The MK Department of Leeds University and Durham University in the United Kingdom has built a multi-axis artificial hip joint simulator, but the swing on the coronal plane has been omitted from the design. In addition, Ge Shirong and Liu Jinlong of China University of Mining and Technology have designed a spring-driven transmission. Axial artificial hip joint simulation test machine, but due to the characteristics of the spring itself, there is a non-stationary transmission. As the use time increases, the plastic deformation of the spring increases, the spring force decreases, and the magnitude of the spring force is difficult to measure.

technical problem

The object of the present invention is to overcome the deficiencies in the prior art and to provide a self-resetting hip joint testing machine capable of achieving a cross-shaped multi-directional composite motion with compact structure, stable performance and low cost.

Technical solution

The cylinder self-resetting hip joint testing machine of the invention comprises a frame composed of a top plate, a bottom plate and a pillar connected between the top and the bottom plate, wherein the frame is provided with a support frame, and the upper and lower ends of the support frame are fixed on the support. The drive shaft on the frame and the bottom plate is provided with a lower lower cam, a turbine, a middle cam and an upper cam in turn, and two ends of the drive shaft are respectively fixed on the bottom plate and the support frame, and the upper part of the support frame is arranged The curved bearing housing has a spherical base on the curved bearing seat, the spherical base is provided with a solution basin, and the solution basin is provided with a joint head ball seat embedded in the spherical base. The solution basin is provided with a movable platform fixed to the basin edge thereof, and the movable platform is respectively connected with three cams by a wire rope pulling device and a pneumatic transmission device; the top plate is provided with a hydraulic cylinder connected to the hydraulic system, and the hydraulic pressure is provided. The piston rod of the cylinder passes through the top plate, and is provided with a guiding slider and a joint shackle fastened on the joint head, and an MCL-Z5 column pressure sensor is arranged between the guiding slider and the joint sill; a control solution basin is arranged on the top plate Internal temperature Temperature controller; on top of the drive shaft is provided with a ball head pin on the base plate.

The curved bearing housing is composed of a seat sleeve having a concave groove and a thrust bearing seat which is matched with the concave groove of the seat sleeve.

The wire rope pulling device comprises a wire rope fastener fixed at a corner end of the moving platform, a steel wire rope, and a fixed pulley block vertically fixed on the outer wall of the support frame, the steel wire rope changes the transmission direction by the fixed pulley group, and the left end is connected by the wire rope fastener. On the platform, the right end is connected to the left extension of the TQGA.2 double piston rod cylinder via a circular joint.

The pneumatic transmission device comprises a TQGA single-acting cylinder fixed on the top of the support frame, a TQGA.2 double-piston cylinder fixed to the side wall of the support frame, and the TQGA single-acting cylinder is fixedly connected with the movable platform through the SQ78-RS rod end joint bearing. The left end of the TQGA.2 double piston rod cylinder is connected to the lower end of the corresponding TQGA single-acting cylinder through the air duct, and is supplied with compressed gas, the right end of the TQGA.2 double piston rod cylinder and the TQGA single acting cylinder. The upper end air pressure is 0. The right extension rod of the TQGA.2 double piston rod cylinder is always pressed against the outer contour of the three cams under the action of air pressure. The TQGA single-acting cylinder completes the reset of the moving platform under the action of air pressure. And ensure that the wire rope is always in tension.

The support frame is a Y-shaped structure.

The moving platform is an equilateral triangle plate structure.

The solution pot is a stepped structure closed at the bottom end.

Beneficial effect

The invention is based on cylinder drive, integrating machine, electricity and liquid, and is suitable for accurately and reliably testing biotribological characteristic parameters of artificial joint materials, and providing guiding experimental data for clinical application. The equipment is mainly composed of a frame, a self-reset system, a hydraulic loading system and a temperature control part. The joint ball head test piece is fixed on the spherical base of the thrust bearing through the ball head seat; the self-reset system comprises a wire rope pulling device and a pneumatic transmission device, and is composed of a single and double piston rod cylinder, a cam, a fixed pulley and a wire rope. The spherical base of the joint ball head and the thrust bearing is fixedly connected with the moving platform, and the single piston rod is fixedly connected with the moving platform through the rod end bearing. At the same time, the wire rope is respectively connected to the top end of the moving platform and the left end of the double piston rod through the fixed pulley block, and the double piston The left end air inlet of the rod is connected with the lower air inlet of the single piston rod. Under the action of the compressed gas, the single piston rod cylinder completes the resetting of the moving platform, and the right end of the double piston rod cylinder is always pressed on the cam contour, and the three steel wire ropes With the cooperation of three single-piston rod cylinders under the action of the cam and the double-piston rod cylinder, the multi-directional composite sliding and rotary motion can be completed by using the lever principle to complete the cross-shaped multi-directional composite sliding and rotary motion; the hydraulic loading system is fixed by The loading cylinder of the top plate drives the joint socket to the joint ball head through the guiding portion and the pressure measuring portion; the upper part of the testing machine Holding the board with a thermostat. The hydraulic system is used to simulate the load on the hip joint when the person walks, and the traditional mechanical parts such as cams, fixed pulleys, cylinders and wire ropes are used to replace the expensive imported electric cylinder or the unsteady spring, and the load is applied through the pressure sensor. Detect and feedback to further correct the applied load. The ball head seat is a quick change part, and different joint ball heads can be connected to the testing machine by simply replacing different ball head seats. The spherical base of the thrust bearing is concentric with the joint ball head, so that the load of the joint ball head in the non-vertical direction is zero during the composite motion. The left end of the TQGA.2 double piston rod cylinder is connected to the lower end of the corresponding TQGA single-acting cylinder through the air duct and is supplied with compressed gas. The TQGA.2 double piston rod cylinder right end air pressure and TQGA single acting cylinder upper end The air pressure is 0. The right extension rod of the TQGA.2 double piston rod cylinder is always pressed against the outer contour of the three cams under the action of air pressure. The TQGA single-acting cylinder completes the resetting of the moving platform under the action of air pressure. Ensure that the wire rope is always in tension; in the non-working state, the moving platform can be leveled by adjusting the pressure value of the gas and the wire rope fastener; using the outer contour track of the cam to simulate the motion curve of the person, when it is necessary to increase When swinging the angle of the large moving platform, it is only necessary to increase the eccentricity of the cam. If it is necessary to simulate the joint movement under different working conditions, it is only necessary to replace the cams of different outer contours; the bottom of the solution basin for lubricating liquid The end is closed to prevent leakage of biological lubricating fluid. The temperature control part of the thermostat, heating device and temperature sensor can keep the test temperature of the bio-lubricant in the solution basin at 37±1 °C. The use of traditional mechanical components such as cams, fixed pulleys, cylinders and wire ropes to replace expensive imported electric cylinders can effectively reduce test costs and maintenance costs and increase the applicability of the test machine. In addition, compared with the use of spring transmission, the spring force is uncontrollable and unmeasurable. The cylinder drive can be used to easily measure the pressure value of the cylinder. It can be replenished and adjusted at any time, and the cylinder is fixed on the support frame to solve the spring. The problem of unstable transmission during transmission.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention;

2 is a top plan view of the movable platform structure of the present invention;

Figure 3 is a top plan view of the support frame mechanism of the present invention.

In the picture: 1-I hexagon socket head cap screw, 2-base plate, 3-TQGA.2 double piston rod cylinder, 4-round joint, 5-down cam, 6-bearing sleeve, 7-6404 rolling bearing, 8-ball Head pin, 9-axis end fastening screw, 10- B60 shaft end retaining ring, 11-bearing top ring, 12-tightening nut, 13-stepper motor, 14-support frame, 15-post, 16-coupling, 17-turbo, 18-worm, 19-II Hexagon socket head cap screws, 20-cylinder block, 21-LB base, 22-seat cover, 23-thrust bearing race, 24-FB flange, 25-hex head hinged hole bolt assembly, 26-solution basin, 27-fastening plate, 28-wire rope fastener, 29-moving platform, 30-I slotted cylindrical head screw, 31-top plate, 32-II Slotted cylindrical head screw, 33, 34-hex head reaming bolt assembly, 35-I set screw, 36-cylinder locating pin, 37-cylinder, 38-guide sleeve, 39-guide screw, 40-guide Slider, 41-II set screw, 42-temperature controller, 43- Column pressure sensor, 44-joint, 45-seal, 46-joint, 47-wire fixed shaft, 48-SQ78-RS rod end joint bearing, 49-wire rope, 50-joint, 51-grooving Turning screw, 52-ball head, 53-spherical base, 54-TQGA single-acting cylinder, 55-I flat key, 56-up cam, 57-middle cam, 58-air duct, 59- fixed pulley set, 60- Drive shaft, 61-II flat key, 62-hex head hinged hole bolt assembly.

Embodiments of the invention

An embodiment of the present invention will be further described below with reference to the accompanying drawings:

The cylinder self-resetting hip joint testing machine of the invention mainly comprises a frame, a movable platform 29 arranged in a triangle in the frame, a transmission shaft 60 below the moving platform 29, a cam, a turbine vortex transmission mechanism, a support frame 14, and a solution basin. 26. The ball head 52, the column pressure sensor 43 above the moving platform 29, the guide slider 40, the hydraulic cylinder 37, the wire rope pulling device, the pneumatic transmission device and the like are formed. A support frame 14 is arranged in the frame, and the support frame 14 is a Y-shaped structure. The support frame 14 is provided with a transmission shaft 60 which is fixed on the support frame 14 and the bottom plate 2 at both upper and lower ends, and the lower shaft is sequentially provided on the transmission shaft 60. 5, the turbine 17, the middle cam 57, the upper cam 56, the two ends of the transmission shaft 60 are respectively fixed on the bottom plate 2 and the support frame 14 on the support frame 6, above the support frame 14 is provided with a curved bearing seat, curved surface The bearing housing is composed of a seat sleeve 22 having a concave groove and a thrust bearing race 23 which is in transitional engagement with the concave groove of the seat sleeve 22. The curved bearing seat is provided with a spherical base 53 which is matched with the curved surface thereof. The spherical base 53 is provided with a solution basin 26, the solution basin 26 is a stepped structure closed at the bottom end, and the solution basin 26 is embedded in the spherical base. The joint head ball seat 52 in the seat 53 is provided with a movable platform 29 fixed to the tank basin 26, and the movable platform 29 is respectively connected with the three

cams

5, 57 by the wire rope pulling device and the pneumatic transmission device. 56. The wire rope pulling device comprises a wire rope fastener 28 fixed at the corner end of the moving platform 29, a wire rope 49, and a fixed pulley block 59 vertically fixed on the outer wall of the support frame 14. The wire rope 49 changes the transmission direction through the fixed pulley block 59. The left end is connected to the movable platform 29 by a wire rope fastener 28, and the right end is connected to the left extension rod of the TQGA.2 double piston rod cylinder 3 via a circular joint 4. The pneumatic transmission device comprises a TQGA single-acting cylinder 54 fixed on the top of the support frame 14, a TQGA.2 double piston rod cylinder 3 fixed on the side wall of the support frame 14, and a TQGA single-acting cylinder 54 through the SQ78-RS rod end joint bearing. 48 is fixedly connected to the movable platform 29, and the movable platform 29 is an equilateral triangular plate structure. The intake port of the TQGA.2 double piston rod cylinder 3 is connected to the lower air inlet of the TQGA single-acting cylinder 54 through the air duct 58, and the right extension rod of the TQGA.2 double piston rod cylinder 3 is always pressed under the action of the air pressure. On the outer contour of the three

cams

5, 57, 56, the TQGA single-acting cylinder 54 completes the resetting of the moving platform 29 under the action of air pressure and ensures that the wire rope 49 is always in tension. The top plate 31 is provided with a hydraulic cylinder 37 connected to the hydraulic system. The piston rod of the hydraulic cylinder 37 passes through the top plate 31, and is provided with a guiding slider 40 and a joint cymbal 44 attached to the joint head 46 for guiding sliding. An MCL-Z5 column pressure sensor 43 is disposed between the block 30 and the glenoid 44; the top plate 31 is provided with a temperature controller 42 for controlling the temperature in the solution basin 26; and the bottom plate 2 is provided with a ball top placed on the transmission shaft 60. Pin 8. The frame is composed of a top plate 31, a bottom plate 2, and a strut 15 connected between the top and bottom plates by a hexagon socket head cap screw 1. The top plate 31 is provided with a temperature controller 42 for controlling the temperature in the solution pot 26, so that the test temperature of the bio-lubricant in the solution pot can be maintained at 37±1 ° C; the middle part of the top plate 31 is provided with a bolt assembly through the hexagon head reaming hole. A hydraulic cylinder 37 connected to the hydraulic system, the piston rod of the hydraulic cylinder 37 passes through the top plate 31, and is provided with a guide slider 40 and a glenoid 44 fastened to the joint head 46, and the guide slider 40 and the joint 44 There is a column pressure sensor 43 of the type MCL-Z5, and both ends of the column pressure sensor 43 are fixed to the joint cymbal 44 and the guide slider 40 by the II set screw 41, respectively, and the guide slider 40 and the hydraulic cylinder 37 are provided. The outer sleeve is provided with a guiding sleeve 38. The outer wall of the guiding sleeve 38 is provided with a guiding screw 39. The outer wall of the guiding slider 40 is provided with a guiding groove matched with the head of the guiding screw 39. The hydraulic cylinder 37 is fixed by the hexagonal head reaming hole by bolts 34. On the top plate 31, the protruding end of the hydraulic cylinder 37 is screwed to the guide slider 40, and the I set screw 35 fixes the guide sleeve 38 to prevent rotation. The guide sleeve 38 is fixed by the stepped hole and the cylindrical positioning pin 36. On the top plate 31, a guide screw 39 is fixed to the side wall of the guide sleeve 38. Completed with the guide cylinder 40 on the side wall of the slider guide grooves 37 extend along the side guiding function. The turbine worm drive mechanism is mainly composed of a stepping motor 13, a coupling 16 connected to the motor 13, a volute 18 connected to the coupling 16, and a turbine 17. The support frame 14 is fixed to the bottom plate 2 of the frame by screws. The support frame 14 is provided with a vertical transmission shaft 60. The transmission shaft 60 is sequentially provided with a lower cam 5, a turbine 17, a middle cam 57, an upper cam 56, upper and lower. The two ends are respectively connected with a 6404 rolling bearing 7; the turbine 17 and the middle cam 57 are fixed on the transmission shaft 60 with the I flat key 55, the shoulder end surface and the fastening nuts 12 provided at both ends, and the upper cam 56 and the lower cam 5 are level II. The key 61, the shoulder end surface, and the bearing top ring 11 disposed at both ends are fixed to the transmission shaft 60; the 6404 rolling bearing 7 is passed through the shaft end fastening screw 9, the B60 shaft end retaining ring 10, and the lower end of the lower cam 5 and the upper cam 56. The upper bearing end ring 11 is placed in the bearing housing 6, and the bearing housing 6 is respectively fixed on the lower surface of the support frame 14 and the bottom plate 2 by screws, and the bottom plate 2 is provided with a ball stud pin 8 which is mounted on the rotating shaft 60. Provides an auxiliary support. The upper surface of the support frame 14 is provided with a curved bearing seat, and the curved bearing seat is composed of a seat cover 22 having a concave groove and a thrust bearing race 23 which is engaged with the concave groove of the seat cover 22. The spherical bearing seat 23 is provided with a spherical base 53 which is matched with the curved surface thereof. The spherical base 53 is provided with a solution basin 26, and the spherical base 53 and the solution basin 26 are connected and fixed by a fastening plate 27, and the solution basin 26 is provided. The stepped structure closed at the bottom end can effectively prevent the leakage of the tissue fluid during the experiment, the ball head seat 52 is embedded in the solution basin 26, and is fixed by the II slotted cylindrical head screw 32, and the joint head 46 is embedded in the ball head seat. In the 52, the slotted anti-rotation screw 51 on the side wall functions as an anti-rotation function, and the spherical base 53 is slidably engaged with the thrust bearing race 23, and at the same time, the spherical center of the joint head 46 and the outer spherical ball of the spherical base 53 The heart is in the same position to ensure that the load applied by the hydraulic cylinder 37 just passes through the center of the joint head 46 during operation and the load is zero in the non-vertical direction. The solution basin 26 is provided with a movable platform 29 fixed to the end surface thereof by a hexagonal head reaming bolt assembly 33, and a sealing ring 45 is disposed on the contact surface of the solution basin 26 and the movable platform 29, and the movable platform 29 is an equilateral triangular plate structure, The top corners are respectively provided with bidirectional T-shaped grooves. The three bidirectional T-shaped grooves of the movable platform 29 are provided with wire rope pulling devices respectively connected with the upper, middle and lower cams, and the wire rope pulling device comprises steel wires respectively fixed in three bidirectional T-shaped grooves of the moving platform 29. a fixed shaft 47, a wire rope fastener 28 fixed at the bottom of the movable platform 29, a wire rope 49, and a fixed pulley block 59 fixed to the outside of the support frame 14. One end of the wire rope 49 is fixed in the two-way T-shaped groove by the wire fixing shaft 47, and the wire rope can be realized. The quick release of the 49, the other end is connected to the left extension rod of the TQGA.2 double piston rod cylinder 3 in the pneumatic transmission through the round joint 4. The connecting holes of the pneumatic transmission device are evenly arranged on the movable platform 29. The pneumatic transmission device includes a TQGA single-acting cylinder 54 fixed to the top of the support frame 14 via a hexagonal head reaming hole bolt assembly 25, and a TQGA fixed to the side wall of the support frame 14. .2 double piston rod cylinder 3, TQGA single-acting cylinder 54 is fixed to the support frame 14 by the FB flange 24 with a hexagonal head reaming bolt 25, and the TQGA.2 double piston rod cylinder 3 passes through the LB base 21 and the cylinder fixed block. 20 is fixed to the outer wall of the support frame 14 by a hexagon socket head cap screw 19, and the cylinder block 20 is fixed to the TQGA.2 double piston rod cylinder 3 by a hexagonal head joint bolt assembly 62, and the TQGA single-acting cylinder 54 passes. The connector 50, the slotted cylinder head screw 30 and the SQ78-RS rod end joint bearing 48 are fixedly connected to the movable platform 29, and the left extension rod of the TQGA.2 double piston rod cylinder 3 is connected to the outer contour of the cam through the circular joint 4. The left end air inlet of the TQGA.2 double piston rod cylinder 3 is connected to the lower air inlet of the corresponding TQGA single acting cylinder 54 through the air guiding pipe 58, and the compressed gas is introduced, and the right end air pressure of the TQGA.2 double piston rod cylinder 3 is The air pressure at the upper end of the TQGA single-acting cylinder 54 is zero. The worm 18 is connected to the stepping motor 13 via a coupling 16, and the stepping motor 13 can drive the upper, middle and lower cams to rotate at the same rate. When the cam rotates, taking the middle cam 57 as an example, the piston of the TQGA.2 double piston rod cylinder 3 moves to the right under the action of air pressure, and the right extension rod is always pressed against the three cams 5 through the

round joint

4, 57, 56 on the outer contour, because the wire rope 49 acts on the moving platform 29 the torque is greater than the torque of the TQGA single-acting cylinder 54 acting on the moving platform 29, the left protruding rod can drive the moving platform 29 through the round joint and the wire rope 49 Downward movement, TQGA single-acting cylinder 54 piston moves downward, TQGA.2 double piston rod cylinder 3 left end pressure increases, further forcing TQGA.2 double piston rod cylinder 3 right extension rod to be pressed through the round joint 4 in three On the outer contour of the

cams

5, 57, 56, when the cam continues to rotate, the piston of the TQGA.2 double piston rod cylinder 3 moves to the left under the action of the cam profile, and the piston of the TQGA single-acting cylinder 54 moves upward by the action of the air pressure. After the resetting of the movable platform 29 is completed, since the action point of the TQGA single-acting cylinder 54 is in the middle of the movable platform 29, according to the proportional relationship, the wire rope 49 can always be in a tension state. Under the joint action of three sets of wire rope pulling devices and pneumatic transmission devices, the rotation of the cam can drive the moving platform 29 to realize a cross-shaped multi-directional composite motion. In the non-working state, the moving platform can also be leveled by adjusting the pressure value of the gas and the wire rope fastener 28. The outer contour of the cam can be processed according to the actual required motion trajectory, and the pendulum of the moving platform 29 must be increased. At the angle, it is only necessary to increase the eccentricity of the cam. When simulating the joint motion under different working conditions, it is only necessary to replace the cams of different outer contours. The solution basin 26 is a stepped structure closed at the bottom end, which can effectively prevent leakage of the tissue fluid during the experiment.

Claims

A cylinder self-resetting hip joint testing machine comprises a frame composed of a top plate (31), a bottom plate (2) and a pillar (15) connected between the top and the bottom plate, wherein the frame is provided with a support frame (14) for supporting The frame (14) is provided with a transmission shaft (60) which is fixed on the support frame (14) and the bottom plate (2) at both upper and lower ends, and the lower shaft cam (5) and the turbine are sequentially arranged on the transmission shaft (60). ), the middle cam (57), the upper cam (56), and the two ends of the transmission shaft (60) are provided with bearing seats (6) respectively fixed on the bottom plate (2) and the support frame (14), and the support frame (14) The upper part is provided with a curved bearing seat, and the curved bearing seat is provided with a spherical base (53) which is matched with the curved surface thereof, and the spherical base (53) is provided with a solution basin (26), and the solution basin (26) is provided therein. There is a joint head (52) embedded in the spherical base (53), and the solution basin (26) is provided with a moving platform (29) fixed to the edge of the bowl, characterized in that: the moving platform (29) respectively connected to three cams (5, 57, 56) by a wire rope pulling device and a pneumatic transmission device; the top plate ( 31) is provided with a hydraulic cylinder (37) connected to the hydraulic system, the piston rod of the hydraulic cylinder (37) passes through the top plate (31), and is provided with a guiding slider (40) and a buckle on the joint head (46) The glenoid (44), the MCL-Z5 column pressure sensor (43) is disposed between the guide slider (30) and the glenoid (44); and the temperature of the solution solution basin (26) is provided on the top plate (31). The temperature controller (42); the bottom plate (2) is provided with a ball stud (8) on the drive shaft (60).
The cylinder self-resetting hip joint testing machine according to claim 1, wherein the curved bearing housing is formed by a sleeve (22) having a concave groove and a concave groove of the seat cover (22). The transition fit thrust bearing race (23) is formed.
A cylinder self-resetting hip joint testing machine according to claim 1, wherein said wire rope pulling device comprises a wire rope fastener (28) fixed to a corner end of the moving platform (29), a wire rope (49), and a vertical a fixed pulley block (59) fixed directly on the outer wall of the support frame (14), the wire rope (49) is changed in the transmission direction by the fixed pulley block (59), and the left end is connected to the moving platform (29) by the wire rope fastener (28). The right end is connected to the left extension of the TQGA.2 double piston rod cylinder (3) via a circular joint (4).
The cylinder self-resetting hip joint testing machine according to claim 1, wherein said pneumatic transmission device comprises a TQGA single-acting cylinder (54) fixed to the top of the support frame (14) and fixed to the support frame (14). The TQGA.2 double piston rod cylinder (3) and the TQGA single acting cylinder (54) are connected and fixed to the moving platform (29) through the SQ78-RS rod end joint bearing (48), and the TQGA.2 double piston rod cylinder ( 3) The air inlet is connected to the lower air inlet of the TQGA single-acting cylinder (54) through the air duct (58), and the right extension rod of the TQGA.2 double piston rod cylinder (3) is always pressed under the action of air pressure. On the outer contour of the three cams (5, 57, 56), the TQGA single-acting cylinder (54) completes the resetting of the moving platform (29) under the action of air pressure and ensures that the wire rope (49) is always in tension.
The cylinder self-resetting hip joint testing machine according to claim 1, wherein said support frame (14) has a Y-shaped structure.
The cylinder self-resetting hip joint testing machine according to claim 1, wherein the moving platform (29) is an equilateral triangular plate structure.
The cylinder self-resetting hip joint testing machine according to claim 1, wherein the solution basin (26) is a stepped structure with a bottom end closed.