CN105266932A - Vertical type total knee replacement patella movement test device - Google Patents
Vertical type total knee replacement patella movement test device Download PDFInfo
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- CN105266932A CN105266932A CN201510700903.5A CN201510700903A CN105266932A CN 105266932 A CN105266932 A CN 105266932A CN 201510700903 A CN201510700903 A CN 201510700903A CN 105266932 A CN105266932 A CN 105266932A
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Abstract
The invention relates to a vertical type total knee replacement patella movement test device. The vertical type total knee replacement patella movement test device is composed of a supporting structure, a femur movement mechanism, a patella movement mechanism, a tibia movement mechanism and a driving mechanism of the tibia movement mechanism; the supporting structure can realize fixed connection of the test device and movement support of a femur; the movement support is provided by the piston rod of a hydraulic cylinder and is connected with the femur movement mechanism; the femur movement mechanism drives a proximal femur to move up and down and rotate, so that the flexion-extension movement of the femur can be realized; a linkage mechanism of patella and femur movement is adopted, so that patella movement which is coordinated and consistent with the flexion-extension process of the femur can be generated; and the tibia movement mechanism and the driving mechanism thereof are installed at the bottom plate of the supporting structure, and generate flexion-extension movement and self rotation movement of a tibia. According to the vertical type total knee replacement patella movement test device of the invention, the actual movement situation of a replacement prosthesis in the knee of a human being is simulated, so that the movement of the patella can be tested; multiple kinds of movement such as the upward/downward movement of the proximal femur, the flexion-extension movement of the femur, the displacement of patellar ligaments as well as the flexion-extension movement and self rotation movement of the tibia are measured, so that the movement performance of the patella can be obtained.
Description
Technical field
The present invention relates to a kind of device of total knee prostheses exercise test, particularly relate to a kind of vertical Total knee arthroplasty joint patella exercise test device, belong to therapeutic treatment and Design for Medical Device manufacturing technology field.
Background technology
Knee joint as joint maximum in human body, not only support human body weight but also bear lower limb exercise.Because kneed outer bare structure very easily damages, the gonarthritis that causes of fatigue damage is sick in addition, just more make knee joint injury and arthritis case rapidly soaring.The ultimate Therapeutic Method of gonarthritis disease is total knee replacement, and along with social senilization, total knee replacement becomes the chief surgical of Orthopeadic Surgery, and it affects wide power of influence and looks by force known especially.But knee joint biological structure is complicated, shin stock and patellofemoral joint string are also coupled, the change in total knee replacement posterior joint material and shape face, not only affect the exercise performance of shin femoral joint and kneecap stock relation, and the stable and dynamic balancing of impact displacement posterior joint, especially more obvious on the impact of patellofemoral joint, such as: the stress distribution that can change articular surface, cause stress to concentrate or joint destabilization, also may change tightness and the stress distribution of articular ligament, cause ligament injury by additional stress.Therefore, after knee replacement, the performance of patellofemoral joint and the kinetic characteristic of patella become the leading indicator of postoperative ankle quality.For reducing the complication of total knee replacement patella, displacement the postoperative of knee joint is avoided to overhaul, the kinetic characteristic of the patella of test replacement prosthesis knee joint just becomes of Orthopeadic Surgery field key issue important and in the urgent need to address, invents its relevant testing equipment and device just its most crucial technology especially.The unique distinction of test set of the present invention is the motion based on human body displacement knee prostheses, by the motion of prosthetic joint after femur, patella and tibia mechanism analog displacement knee joint, gather the moving up and down of near end of thighbone in the whole motor process that its knee joint bends and stretches, the flexion and extension of femur, the swing of patella, the related data such as the flexion and extension of tibia and spin motion, be comprehensively synthesized into the exercise performance of its patella.The maximum angle of bending and stretching that this device can realize is 120 °, and the present invention is that the exercise test of displacement knee prostheses joint especially patella provides technology and equipment.
Summary of the invention
1, object: the object of this invention is to provide a kind of vertical Total knee arthroplasty joint patella exercise test device, the kinestate that kneed motion approaches human body knee joint after Total knee arthroplasty is replaced in this device, especially the relative motion of patella to femur slideway is achieved in a device, measure and record the exercise parameter of femur, patella, tibia, for the kinetic characteristic of assessment displacement patella provides technical data and method.
2, technical scheme: as Fig. 1, a kind of vertical Total knee arthroplasty joint of the present invention patella exercise test device, it is made up of supporting construction, femur motion, patella motion, tibia motion and driving mechanism four part thereof, and the position annexation between them is: supporting construction realizes the support of other parts of test set and the support to femur motion in motion; Hydraulic cylinder piston rod and the guiding mechanism thereof of femur motion and supporting construction are connected, and produce moving up and down and the flexion and extension of femur of near end of thighbone; Patella motion is connected with femur motion, and generation patella bends and stretches the relative motion in process at femur; Tibia motion and driving mechanism thereof are arranged on the base plate of supporting construction, produce flexion and extension and the spin motion of tibia.The femur of knee-joint prosthesis, tibia are separately fixed in the corresponding bone holder of femur motion, tibia motion, and the patellar ligament of knee-joint prosthesis is drawn by the ligament clamping device of patella motion.
As Fig. 2, described supporting construction, comprises base plate, dust cover, aluminium section upright post, hydraulic cylinder, hydraulic cylinder base, hydraulic cylinder guiding mechanism and connector, and the position annexation between them is: base plate is positioned at the bottom of supporting construction; Aluminium section upright post is arranged on base plate; Hydraulic cylinder is placed in hydraulic cylinder base and is arranged on base plate; Hydraulic cylinder piston rod top is connected with guiding mechanism, and realizes guiding by both sides aluminium section upright post; Dust cover is positioned at the top of supporting construction, by making supporting construction form a closed structure with the connection of aluminium section upright post; As Fig. 3 (a), (b), a wherein aluminium section upright post fixed for helical rack, model is APS-8-4080, four aluminium section upright posts for hydraulic cylinder guiding, model is APS-8-4040, and the specification of this hydraulic cylinder is 32/16-400; It is identical that aluminium section upright post is fixedly connected with mode, and bottom is connected with base plate by bolt, corner connector, and top is interconnected by screw, meeting stile and covers one piece of dust cover; This base plate is rectangle plate; This dust cover is hexagon plate; Be installed on bottom hydraulic cylinder in hydraulic cylinder base, hydraulic cylinder base is bolted on base plate, and hydraulic cylinder top is fixed between two aluminium section upright posts by bolt, connector; As Fig. 4, hydraulic cylinder guiding mechanism, the motion guide of hydraulic cylinder piston rod is realized by the groove of column, sliding nut block and union piece thereof, this sliding nut block comprises matrix, ball, ball baffle plate, screw, ball is placed in the groove of matrix, realizes rolling friction, reduces friction, ball baffle plate is fixed by screws in the two ends of matrix, prevents ball from dropping.
As Fig. 5 a, 5b, described femur motion, comprises helical rack, tooth bar backing plate, grip block, axle system one, axle system two, axle system three, axle system four, femur holder and connector; Position annexation between them is: this helical rack is fixed by screws on tooth bar backing plate, and tooth bar backing plate is fixed on the aluminium section upright post of supporting construction by screw, hold-down nut block; The main shaft of axle system one is gear shaft, cooperatively interacts with helical gear in axle system two, and install a helical gear in the middle of gear shaft, cooperatively interact with helical rack, this helical gear one end shaft shoulder is fixed, and other end circlip is fixed, by key transmitting torque; These gear shaft two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing is fixed by the shaft shoulder, end cap, circlip, this gear shaft end is connected with the speed measuring motor of band encoder, the angle measured can be scaled the displacement of near end of thighbone, achieves the measurement near end of thighbone motion conditions and record; The main shaft of axle system two is gear shaft, cooperatively interact with helical gear in axle system three, gear shaft two ends are provided with two helical gears, cooperatively interact with axle system one axle that cogs, this helical gear one end shaft shoulder is fixed, and other end sleeve is fixed, by key transmitting torque, these gear shaft two ends are provided with angular contact bearing, and mounting means is install face-to-face, and this angular contact bearing is fixed by sleeve, end cap, circlip; The main shaft of axle system three is multidiameter, the two ends of this multidiameter are provided with two helical gears, cooperatively interact with the helical gear in axle system two and axle system four, this helical gear one end shaft shoulder is fixed, other end sleeve is fixed, and by key transmitting torque, these multidiameter two ends are provided with angular contact bearing, mounting means is install face-to-face, and this angular contact bearing is fixed by sleeve, end cap, circlip; The main shaft of axle system four is multidiameter, the two ends of this multidiameter are provided with two helical gears, cooperatively interact with the helical gear in axle system three, this helical gear one end shaft shoulder is fixed, other end sleeve is fixed, by key transmitting torque, these multidiameter two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing is fixed by sleeve, end cap, circlip, this multidiameter end is connected with the speed measuring motor of band encoder, the angle of measurement be femur bend and stretch angle, achieve the measurement to femur flexion and extension situation and record; Femur holder, play the effect of femur clamping, be fixed by screws on the worm gear case of patella motion, worm gear case is connected with the main shaft of axle system four by screw, connector, key, circlip.
As Fig. 6, described patella motion, comprises worm-wheel shaft system, worm shaft system, worm gear case, steel wire rope, ligament clamping device and connector, position annexation between them is: as Fig. 7, the main shaft of worm shaft system is worm shaft, the worm gear fastened with worm-wheel shaft cooperatively interacts, these worm shaft two ends are provided with two epicyclic singleplent helical gears, with be installed on the fixing helical gear of two in femur motion axle system four and cooperatively interact, this helical gear one end shaft shoulder is fixed, other end sleeve is fixed, by key transmitting torque, these worm shaft two ends are provided with angular contact bearing, mounting means is install face-to-face, and this angular contact bearing is fixed by sleeve, end cap, circlip, the main shaft of worm-wheel shaft system is multidiameter, centre is provided with a worm gear, this worm gear one end shaft shoulder is fixed, other end sleeve is fixed, by key transmitting torque, these multidiameter two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing, the fixed form of one is for passing through sleeve, end cap, circlip is fixed, another fixed form is for passing through the shaft shoulder, end cap is fixed, as Fig. 8, this multidiameter end is connected with the speed measuring motor of band encoder, the angle measured is the movement angle of patella, achieve the measurement to patella motion conditions and record, worm gear case, plays the supporting role to worm-wheel shaft system, worm shaft system, femur holder, is connected with the main shaft of axle system four by screw, connector, key, circlip, as Fig. 9, ligament clamping device: comprise base plate, pressing plate, steel wire rope guide plate, screw, realize the clamping to patellar ligament, and be connected by the main shaft of steel wire rope with worm-wheel shaft system, realize the corresponding sports of patella, the main shaft of this steel wire rope and worm-wheel shaft system realizes fixing by screw.
As Figure 10, described tibia motion, comprises gripper shoe, flexion and extension axle system, spin motion axle system, tibia holder and connector; Position annexation between them is: this gripper shoe is fixed on the base plate of supporting construction by bolt, corner connector; The main shaft of flexion and extension axle system is multidiameter, be connected with spin motion axle system by connector, these multidiameter two ends are provided with angular contact bearing, mounting means is install face-to-face, and this angular contact bearing is fixed by sleeve, end cap, circlip, the external part of this multidiameter, be connected by the rocking bar of key with tibia motion driving mechanism, be connected with the speed measuring motor of band encoder simultaneously, the angle of measurement be tibia bend and stretch angle, achieve the measurement to tibia flexion and extension situation and record; As Figure 11, the main shaft of spin motion axle system is special-shaped axis, one end of this main shaft is connected with tibia holder by bolt, the other end is provided with angular contact bearing, this angular contact bearing is fixed by the shaft shoulder, end cap, circlip, this spindle nose is connected with the speed measuring motor of band encoder, and the angle of measurement is the spin angle of tibia, achieves the measurement to tibia spin motion situation and record; As Figure 12, the driving mechanism of described tibia motion: comprise slowspeed machine, shaft coupling, power transmission shaft, motor support plate, crank block-endplay device; Position annexation between them is: the model of this slowspeed machine is 120TYD-S30M, is bolted in motor support plate, and motor support plate is fixed on the base plate of supporting construction by bolt, corner connector; Power transmission shaft is supported by power transmission shaft gripper shoe, and its one end is connected with slowspeed machine by key, shaft coupling, bolt, and the other end is connected with the crank of crank block-endplay device by key, circlip, realizes the motion of slowspeed machine driving crank; This crank block-endplay device, comprise crank, short connecting rod, slide block mechanism, V-type rail, guide support, long connecting rod, rocking bar, minor axis and connector, position annexation between them is: motion parts are connected by minor axis between any two, crank, short connecting rod, slide block mechanism, V-type rail form slider-crank mechanism, long connecting rod, rocking bar form endplay device, and the slide block mechanism of slider-crank mechanism is connected with the long connecting rod of endplay device; It realizes the slip rotation of crank being converted to slide block mechanism, then the slip of slide block mechanism is converted to the swing of rocking bar; As Figure 13 a, 13b, this slide block mechanism, achieves rolling friction, and comprise slide block, ball, ball baffle plate, screw, ball is placed in the groove of slide block, and ball baffle plate is fixed by screws in slide block two ends, and slide block mechanism is placed on V-type rail; V-type rail is connected with guide support by screw, guide support by corner connector, be bolted on the base plate of supporting construction; Connected by minor axis between crank, short connecting rod, slide block mechanism, long connecting rod, rocking bar, realize axial location by sleeve, circlip; This rocking bar is connected by the main shaft of key with tibia motion flexion and extension axle system, drives it to move.
Wherein, axle system one end of femur motion, axle system four end, the worm-wheel shaft system end of patella motion, the flexion and extension axle system of tibia motion, spin motion axle system end, all be connected with the speed measuring motor of band encoder, the speed measuring motor model of this band encoder is ASLONGRF371.
Wherein, the overall dimensions of this test set is 560 × 680 × 1080.
The operating mode brief introduction of the device of a kind of total knee prostheses of the present invention exercise test is as follows: it is 0 ° to 120 ° that knee joint bends and stretches angular range, wherein the angular range that bends and stretches of tibia is 0 ° to 62 °, the moving range of near end of thighbone is 0 to 373mm, loading frequency is 1 ± 0.1Hz, near end of thighbone back and forth movement linear velocity is 764mm/s, tests and carries out under normal temperature and pressure environment.
3, advantage and effect: Total knee arthroplasty joint of the present invention patella exercise test device, it simulates the actual motion situation of knee-joint prosthesis in human body knee joint, especially achieve knee joint and bend and stretch the relative motion of middle patella to femur, make prosthese motion in the apparatus more approach the situation of displacement knee joint, thus test result is more accurate; The exercise parameter of femur, patella, tibia can be measured and record to this device, provides technical data and method for assessing kneed kinetic characteristic.
Accompanying drawing explanation
Fig. 1 Total knee arthroplasty joint of the present invention patella exercise test apparatus structure schematic diagram.
Fig. 2 supporting construction schematic diagram of the present invention.
Fig. 3 (a), (b) aluminium section upright post schematic cross-section of the present invention.
Fig. 4 hydraulic cylinder piston rod top of the present invention connection diagram.
Fig. 5 a femur motion of the present invention schematic diagram.
Fig. 5 b femur motion of the present invention front view.
Fig. 5 c femur motion of the present invention top view.
Fig. 5 d femur motion of the present invention left view.
Fig. 6 patella motion of the present invention schematic diagram.
Fig. 7 worm gear case internal structure of the present invention schematic diagram.
Fig. 8 steel wire rope top of the present invention connection diagram.
Fig. 9 ligament clamping device of the present invention schematic diagram.
Figure 10 tibia motion of the present invention schematic diagram.
Figure 11 tibia spin mechanics of the present invention profile.
Figure 12 tibia motion driving mechanism of the present invention schematic diagram.
Figure 13 a slide block guide rail mechanism of the present invention front view.
Figure 13 b slide block guide rail mechanism of the present invention axonometric chart.
Number in the figure is described as follows:
1, supporting construction; 2, femur telecontrol equipment; 3, patella telecontrol equipment; 4, tibia motion and driving mechanism thereof;
1-1, base plate; 1-2, aluminium section upright post APS-8-4080; 1-3, dust cover; 1-4, aluminium section upright post APS-8-4040; 1-5, hydraulic cylinder 32/16-400; 1-6, hydraulic cylinder piston rod; 1-7, piston rod apex connection; 1-8, sliding nut block; 1-9, guiding connector; The corner connector of 1-10, ribbed plate;
2-1, helical rack; 2-2, helical gear one; 2-3, gear shaft one; 2-4, helical gear two; 2-5, gear shaft two; 2-6, helical gear three; 2-7, multidiameter one; 2-8, helical gear four; 2-9, multidiameter two; 2-10, fixing transverse slat; 2-11, strap; 2-12, tooth bar backing plate; 2-13, hold-down nut block; 2-14, grip block;
3-1, femur holder; 3-2, worm gear; 3-3, worm shaft; 3-4, epicyclic singleplent helical gear; 3-5, fixing helical gear; 3-6, box connector; 3-7, worm gear case; 3-8, worm-wheel shaft; 3-9, angular contact bearing code name 292; 3-10, end cap; 3-11, steel wire rope; 3-12, bar shaped support and connection plate; The speed measuring motor ASLONGRF371 of 3-13, band encoder; 3-14, simplification ligament model; 3-15, clamper base plate; 3-16, clamper pressing plate; 3-17, steel wire rope guide plate;
4-1, tibia holder; 4-2, installation connecting plate; 4-3, support connecting piece; 4-4, multidiameter three; 4-5, tibia mechanism support; 4-6, circlip; 4-7, supports end cap; 4-8, angular contact bearing code name 292; 4-9, tibia spin axis; 4-10, slowspeed machine 120TYD-S30M; 4-11, motor support plate; 4-12, shaft coupling; 4-13, power transmission shaft gripper shoe; 4-14, power transmission shaft; 4-15, crank; 4-16, minor axis one; 4-17, short connecting rod; 4-18, minor axis two; 4-19, slide block mechanism; 4-20, V-type rail; 4-21, V-type rail support member; 4-22, long connecting rod; 4-23, minor axis three; 4-24, rocking bar.
Detailed description of the invention
Set forth technical scheme of the present invention further by reference to the accompanying drawings:
As Fig. 1, a kind of vertical Total knee arthroplasty joint of the present invention patella exercise test device, it is by supporting construction 1, femur motion 2, patella motion 3, tibia motion and driving mechanism 4 four part composition thereof, position annexation between them is: the grip block 2-14 of femur motion is connected with the hydraulic cylinder piston rod 1-6 of supporting construction, the tooth bar backing plate 2-12 of femur motion is fixed on the aluminium section upright post APS-8-40801-2 of supporting construction, the worm gear case 3-7 of patella motion is connected with femur motion multidiameter two 2-9, tibia motion and driving mechanism thereof are arranged on the base plate 1-1 of supporting construction, the femur of knee-joint prosthesis, tibia is separately fixed at femur holder 3-1, in tibia holder 4-1, the patellar ligament of knee-joint prosthesis is drawn by the ligament clamping device of patella motion.
Supporting construction realizes the support to other parts of device, and the support to femur motion in motion, femur motion produces the flexion and extension of moving up and down of near end of thighbone and femur, patella motion produces femur and bends and stretches corresponding patella motion in process, and tibia motion and driving mechanism thereof produce flexion and extension and the spin motion of tibia.
The technical scheme of supporting construction and principle:
As Fig. 2, described supporting construction, comprises base plate 1-1, dust cover 1-3, aluminium section upright post APS-8-40801-2 and APS-8-40401-4 (as Fig. 3 (a), (b)), hydraulic cylinder 32/16-4001-5, hydraulic cylinder base, hydraulic cylinder guiding mechanism, connector; As Fig. 4, hydraulic cylinder guiding mechanism, the motion guide of hydraulic cylinder piston rod is realized by the groove of aluminium section upright post 1-2APS-8-4080, sliding nut block 1-8 and guiding connector 1-9 thereof, be connected with hydraulic cylinder piston rod 1-6 by piston rod apex connection 1-7, be connected with femur motion by the corner connector 1-10 of ribbed plate, drive femur motion to move and realize guiding.
The technical scheme of femur motion and principle:
As Fig. 5 a, 5b, femur motion described in 5c, 5d, comprises helical rack 2-1, tooth bar backing plate 2-12, grip block 2-14, axle system one, axle system two, axle system three, axle system four, femur holder 3-1, connector; Helical rack 2-1 is fixed by screws in 2-12 on tooth bar backing plate, and tooth bar backing plate 2-12 is fixed on the aluminium section upright post APS-8-40801-2 of supporting construction by screw, hold-down nut block 2-13; The main shaft of axle system one is gear shaft one 2-3, cooperatively interact with helical gear two 2-4 in axle system two, in the middle of gear shaft one 2-3, helical gear one 2-2 is installed, cooperatively interact with helical rack 2-1, this helical gear one 2-2 one end shaft shoulder is fixed, other end circlip is fixed, by key transmitting torque, these gear shaft one 2-3 two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing is fixed by the shaft shoulder, end cap, circlip, and this gear shaft one 2-3 end is connected with the speed measuring motor ASLONGRF3713-13 of band encoder; The main shaft of axle system two is gear shaft two 2-5, cooperatively interact with helical gear three 2-6 in axle system three, gear shaft two 2-5 two ends are provided with two helical gear two 2-4, cooperatively interact with axle system one axle one 2-3 that cogs, this helical gear two 2-4 one end shaft shoulder is fixed, and other end sleeve is fixed, by key transmitting torque, these gear shaft two 2-5 two ends are provided with angular contact bearing, and mounting means is install face-to-face, and this angular contact bearing is fixed by sleeve, end cap, circlip; The main shaft of axle system three is multidiameter one 2-7, the two ends of multidiameter one 2-7 are provided with two helical gear three 2-6, cooperatively interact with gear shaft two 2-5 of axle system two and helical gear four 2-8 of axle system four, this helical gear three 2-6 one end shaft shoulder is fixed, other end sleeve is fixed, and by key transmitting torque, these multidiameter one 2-7 two ends are provided with angular contact bearing, mounting means is install face-to-face, and this angular contact bearing is fixed by sleeve, end cap, circlip; The main shaft of axle system four is multidiameter two 2-9, the two ends of multidiameter two 2-9 are provided with two helical gear four 2-8, cooperatively interact with helical gear three 2-6 in axle system three, this helical gear four 2-8 one end shaft shoulder is fixed, other end sleeve is fixed, by key transmitting torque, these multidiameter two 2-9 two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing is fixed by sleeve, end cap, circlip, and this multidiameter two 2-9 end is connected with the speed measuring motor ASLONGRF3713-13 of band encoder; Femur holder 3-1, is fixed by screws on the worm gear case 3-7 of patella motion, and worm gear case 3-7 is connected with main shaft multidiameter two 2-9 of axle system four by screw, connector, key, circlip.
The technical scheme of patella motion and principle:
As Fig. 6, patella motion, comprises worm-wheel shaft system, worm shaft system, worm gear case 3-7, steel wire rope 3-11, ligament clamping device, connector, as Fig. 7, the main shaft of worm shaft system is worm shaft 3-3, the worm gear 3-2 fastened with worm-wheel shaft cooperatively interacts, this worm shaft 3-3 two ends are provided with two epicyclic singleplent helical gear 3-4, with be installed on the fixing helical gear 3-5 of two in femur motion axle system four and cooperatively interact, this epicyclic singleplent helical gear 3-4 one end shaft shoulder is fixed, other end sleeve is fixed, by key transmitting torque, this fixing helical gear 3-5 is by fixing transverse slat 2-10, strap 2-11 fixes, this worm shaft 3-3 two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing passes through sleeve, end cap, circlip is fixed, the main shaft of worm-wheel shaft system is worm-wheel shaft 3-8, centre is provided with a worm gear 3-2, this worm gear 3-2 one end shaft shoulder is fixed, other end sleeve is fixed, by key transmitting torque, this worm-wheel shaft 3-8 two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing, the fixed form of one is for fix by sleeve, end cap, circlip, another fixed form is for fix by the shaft shoulder, end cap, and as Fig. 8, this worm-wheel shaft 3-8 end is connected with the speed measuring motor ASLONGRF3713-13 of band encoder, as Fig. 9, ligament clamping device, comprise clamper base plate 3-15, clamper pressing plate 3-16, steel wire rope guide plate 3-17, screw, realize the clamping to simplifying ligament model 3-14, and be connected with the worm-wheel shaft 3-8 of worm-wheel shaft system by steel wire rope 3-11, the worm-wheel shaft 3-8 of this steel wire rope 3-11 and worm-wheel shaft system realizes fixing by screw.
The technical scheme of tibia motion and driving mechanism thereof and principle:
As Figure 10, tibia motion, comprises tibia mechanism support 4-5, flexion and extension axle system, spin motion axle system, tibia holder 4-1, connector; Tibia mechanism support 4-5 is fixed on the base plate 1-1 of supporting construction by bolt, corner connector; The main shaft of flexion and extension axle system is multidiameter 4-4, be connected with spin motion axle system by connector 4-3, support member 4-2, these multidiameter three 4-4 two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing is fixed by sleeve, end cap, circlip, the external part of this multidiameter three 4-4, is connected with the rocking bar 4-24 of tibia motion driving mechanism by key, is connected with the speed measuring motor ASLONGRF3713-13 of band encoder simultaneously; As Figure 11, the main shaft of spin motion axle system is tibia spin axis 4-9, one end of this tibia spin axis 4-9 is connected with tibia holder 4-1 by bolt, the other end is provided with angular contact bearing, this angular contact bearing is fixed by the shaft shoulder, end cap, circlip, and this tibia spin axis 4-9 end is connected with the speed measuring motor ASLONGRF3713-13 of band encoder; As Figure 12, tibia motion driving mechanism, comprises slowspeed machine 120TYD-S30M4-10, shaft coupling 4-12, power transmission shaft 4-14, power transmission shaft gripper shoe 4-13, crank block-endplay device; This slowspeed machine 120TYD-S30M4-10 is bolted on motor support plate 4-11, and motor support plate 4-11 is fixed on the base plate 1-1 of supporting construction by bolt, corner connector; Power transmission shaft 4-14 is supported by power transmission shaft gripper shoe 4-13, and its one end is connected with slowspeed machine 120TYD-S30M4-10 by key, shaft coupling 4-12, bolt, and the other end is connected with the crank 4-15 of crank block-endplay device by key, circlip; This crank block-endplay device, comprise crank 4-15, short connecting rod 4-17, slide block mechanism 4-19, V-type rail 4-20, V-type rail support member 4-21, long connecting rod 4-22, rocking bar 4-24, minor axis one 4-17, minor axis two 4-18, minor axis three 4-23 and connector, realize the slip rotation of crank 4-15 being converted to slide block mechanism 4-19, then the slip of slide block mechanism 4-19 is converted to the swing of rocking bar 4-24; As Figure 13 a, 13b, this slide block mechanism 4-19, comprise slide block, ball, ball baffle plate, screw, ball is placed in the groove of slide block, and ball baffle plate is fixed by screws in slide block two ends, and slide block mechanism 4-19 is placed on V-type rail 4-20; V-type rail 4-20 is connected with V-type rail support member 2-21 by screw, V-type rail support member 4-21 by corner connector, be bolted on the base plate 1-1 of supporting construction; Connected by each minor axis between crank 4-15, short connecting rod 4-17, slide block mechanism 4-19, long connecting rod 4-22, rocking bar 4-24, realize axial location by sleeve, circlip; This rocking bar 4-24 is connected by multidiameter three 4-4 of key with tibia motion flexion and extension axle system, drives it to move.
Claims (3)
1. a vertical Total knee arthroplasty joint patella exercise test device, is characterized in that: it is made up of supporting construction, femur motion, patella motion, tibia motion and driving mechanism four part thereof; Supporting construction realizes the support of other parts of test set and the support to femur motion in motion; Hydraulic cylinder piston rod and the guiding mechanism thereof of femur motion and supporting construction are connected, and produce moving up and down and the flexion and extension of femur of near end of thighbone; Patella motion is connected with femur motion, and generation patella bends and stretches the relative motion in process at femur; Tibia motion and driving mechanism thereof are arranged on the base plate of supporting construction, produce flexion and extension and the spin motion of tibia; The femur of knee-joint prosthesis, tibia are separately fixed in the corresponding bone holder of femur motion, tibia motion, and the patellar ligament of knee-joint prosthesis is drawn by the ligament clamping device of patella motion;
Described supporting construction, comprise base plate, dust cover, aluminium section upright post, hydraulic cylinder, hydraulic cylinder base, hydraulic cylinder guiding mechanism and connector, base plate is positioned at the bottom of supporting construction; Aluminium section upright post is arranged on base plate; Hydraulic cylinder is placed in hydraulic cylinder base and is arranged on base plate; Hydraulic cylinder piston rod top is connected with guiding mechanism, and realizes guiding by both sides aluminium section upright post; Dust cover is positioned at the top of supporting construction, by making supporting construction form a closed structure with the connection of aluminium section upright post; Wherein an aluminium section upright post is used for the fixing of helical rack, and four aluminium section upright posts are used for the guiding of hydraulic cylinder; It is identical that aluminium section upright post is fixedly connected with mode, and bottom is connected with base plate by bolt, corner connector, and top is interconnected by screw, meeting stile and covers one piece of dust cover; This base plate is rectangle plate; This dust cover is hexagon plate; Be installed on bottom hydraulic cylinder in hydraulic cylinder base, hydraulic cylinder base is bolted on base plate, and hydraulic cylinder top is fixed between two aluminium section upright posts by bolt, connector; Hydraulic cylinder guiding mechanism, the motion guide of hydraulic cylinder piston rod is realized by the groove of column, sliding nut block and union piece thereof, this sliding nut block comprises matrix, ball, ball baffle plate, screw, ball is placed in the groove of matrix, realize rolling friction, reduce friction, ball baffle plate is fixed by screws in the two ends of matrix, prevents ball from dropping;
Described femur motion, comprises helical rack, tooth bar backing plate, grip block, axle system one, axle system two, axle system three, axle system four, femur holder and connector; This helical rack is fixed by screws on tooth bar backing plate, and tooth bar backing plate is fixed on the aluminium section upright post of supporting construction by screw, hold-down nut block; The main shaft of axle system one is gear shaft, cooperatively interacts with helical gear in axle system two, and install a helical gear in the middle of gear shaft, cooperatively interact with helical rack, this helical gear one end shaft shoulder is fixed, and other end circlip is fixed, by key transmitting torque; These gear shaft two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing is fixed by the shaft shoulder, end cap, circlip, this gear shaft end is connected with the speed measuring motor of band encoder, the angle conversion measured is the displacement of near end of thighbone, achieves the measurement near end of thighbone motion conditions and record; The main shaft of axle system two is gear shaft, cooperatively interact with helical gear in axle system three, gear shaft two ends are provided with two helical gears, cooperatively interact with axle system one axle that cogs, this helical gear one end shaft shoulder is fixed, and other end sleeve is fixed, by key transmitting torque, these gear shaft two ends are provided with angular contact bearing, and mounting means is install face-to-face, and this angular contact bearing is fixed by sleeve, end cap, circlip; The main shaft of axle system three is multidiameter, the two ends of this multidiameter are provided with two helical gears, cooperatively interact with the helical gear in axle system two and axle system four, this helical gear one end shaft shoulder is fixed, other end sleeve is fixed, and by key transmitting torque, these multidiameter two ends are provided with angular contact bearing, mounting means is install face-to-face, and this angular contact bearing is fixed by sleeve, end cap, circlip; The main shaft of axle system four is multidiameter, the two ends of this multidiameter are provided with two helical gears, cooperatively interact with the helical gear in axle system three, this helical gear one end shaft shoulder is fixed, other end sleeve is fixed, by key transmitting torque, these multidiameter two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing is fixed by sleeve, end cap, circlip, this multidiameter end is connected with the speed measuring motor of band encoder, the angle of measurement be femur bend and stretch angle, achieve the measurement to femur flexion and extension situation and record; Femur holder, play the effect of femur clamping, be fixed by screws on the worm gear case of patella motion, worm gear case is connected with the main shaft of axle system four by screw, connector, key, circlip;
Described patella motion, comprises worm-wheel shaft system, worm shaft system, worm gear case, steel wire rope, ligament clamping device and connector; The main shaft of worm shaft system is worm shaft, the worm gear fastened with worm-wheel shaft cooperatively interacts, these worm shaft two ends are provided with two epicyclic singleplent helical gears, with be installed on the fixing helical gear of two in femur motion axle system four and cooperatively interact, this helical gear one end shaft shoulder is fixed, and other end sleeve is fixed, by key transmitting torque, these worm shaft two ends are provided with angular contact bearing, and mounting means is install face-to-face, and this angular contact bearing is fixed by sleeve, end cap, circlip; The main shaft of worm-wheel shaft system is multidiameter, centre is provided with a worm gear, this worm gear one end shaft shoulder is fixed, other end sleeve is fixed, and by key transmitting torque, these multidiameter two ends are provided with angular contact bearing, mounting means is install face-to-face, this angular contact bearing, the fixed form of one is for fix by sleeve, end cap, circlip, and another fixed form is for fix by the shaft shoulder, end cap; This multidiameter end is connected with the speed measuring motor of band encoder, and the angle of measurement is the movement angle of patella, achieves the measurement to patella motion conditions and record; Worm gear case, plays the supporting role to worm-wheel shaft system, worm shaft system, femur holder, is connected with the main shaft of axle system four by screw, connector, key, circlip; This ligament clamping device: comprise base plate, pressing plate, steel wire rope guide plate, screw, realize the clamping to patellar ligament, and be connected by the main shaft of steel wire rope with worm-wheel shaft system, realize the corresponding sports of patella, the main shaft of this steel wire rope and worm-wheel shaft system realizes fixing by screw;
Described tibia motion, comprises gripper shoe, flexion and extension axle system, spin motion axle system, tibia holder and connector; This gripper shoe is fixed on the base plate of supporting construction by bolt, corner connector; The main shaft of flexion and extension axle system is multidiameter, be connected with spin motion axle system by connector, these multidiameter two ends are provided with angular contact bearing, mounting means is install face-to-face, and this angular contact bearing is fixed by sleeve, end cap, circlip, the external part of this multidiameter, be connected by the rocking bar of key with tibia motion driving mechanism, be connected with the speed measuring motor of band encoder simultaneously, the angle of measurement be tibia bend and stretch angle, achieve the measurement to tibia flexion and extension situation and record; The main shaft of this spin motion axle system is special-shaped axis, one end of this main shaft is connected with tibia holder by bolt, the other end is provided with angular contact bearing, this angular contact bearing is fixed by the shaft shoulder, end cap, circlip, this spindle nose is connected with the speed measuring motor of band encoder, the angle measured is the spin angle of tibia, achieves the measurement to tibia spin motion situation and record; The driving mechanism of described tibia motion: comprise slowspeed machine, shaft coupling, power transmission shaft, motor support plate, crank block-endplay device; This slowspeed machine is bolted in motor support plate, and motor support plate is fixed on the base plate of supporting construction by bolt, corner connector; Power transmission shaft is supported by power transmission shaft gripper shoe, and its one end is connected with slowspeed machine by key, shaft coupling, bolt, and the other end is connected with the crank of crank block-endplay device by key, circlip, realizes the motion of slowspeed machine driving crank; This crank block-endplay device, comprise crank, short connecting rod, slide block mechanism, V-type rail, guide support, long connecting rod, rocking bar, minor axis and connector, motion parts are connected by minor axis between any two, crank, short connecting rod, slide block mechanism, V-type rail form slider-crank mechanism, long connecting rod, rocking bar form endplay device, and the slide block mechanism of slider-crank mechanism is connected with the long connecting rod of endplay device; It realizes the slip rotation of crank being converted to slide block mechanism, then the slip of slide block mechanism is converted to the swing of rocking bar; This slide block mechanism, achieves rolling friction, and comprise slide block, ball, ball baffle plate, screw, ball is placed in the groove of slide block, and ball baffle plate is fixed by screws in slide block two ends, and slide block mechanism is placed on V-type rail; V-type rail is connected with guide support by screw, guide support by corner connector, be bolted on the base plate of supporting construction; Connected by minor axis between crank, short connecting rod, slide block mechanism, long connecting rod, rocking bar, realize axial location by sleeve, circlip; This rocking bar is connected by the main shaft of key with tibia motion flexion and extension axle system, drives it to move.
2. one according to claim 1 vertical Total knee arthroplasty joint patella exercise test device, it is characterized in that: axle system one end of femur motion, axle system four end, the worm-wheel shaft system end of patella motion, the flexion and extension axle system of tibia motion, spin motion axle system end, be all connected with the speed measuring motor of band encoder.
3. one according to claim 1 vertical Total knee arthroplasty joint patella exercise test device, is characterized in that: the overall dimensions of this test set is 560 × 680 × 1080.
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| CN111141509A (en) * | 2020-01-17 | 2020-05-12 | 南京农业大学 | Crane artificial limb joint stress testing device |
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| CN111568613A (en) * | 2020-06-15 | 2020-08-25 | 河南理工大学 | Squatting type human body lower limb joint biological bionic device |
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| CN111568613B (en) * | 2020-06-15 | 2024-07-12 | 河南理工大学 | Biological bionic device for squatting human lower limb joint |
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