CN107328709B - Device for realizing shoulder joint stability measurement - Google Patents
Device for realizing shoulder joint stability measurement Download PDFInfo
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- CN107328709B CN107328709B CN201710700085.8A CN201710700085A CN107328709B CN 107328709 B CN107328709 B CN 107328709B CN 201710700085 A CN201710700085 A CN 201710700085A CN 107328709 B CN107328709 B CN 107328709B
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Abstract
The invention discloses a device for realizing shoulder joint stability measurement, which comprises an MTS material testing machine, a humeral shaft fixing mechanism (1) and a scapula fixing mechanism (2). The humeral shaft fixing mechanism (1) is fixed on a movable chuck of the MTS material testing machine, can realize the adjustment of the rotation angle of the humeral shaft, and finishes the loading of the humeral shaft along the vertical direction under the action of the MTS material testing machine; the scapula fixing mechanism (2) is fixed on a workbench of the MTS material testing machine, so that accurate adjustment of the position of the scapula and adjustment of the abduction angle of the shoulder joint are completed, and the testing requirements are met. The device of the invention carries out quantitative loading on the humeral shaft through the movable clamping head of the MTS testing machine, measures the displacement distance of the humeral head relative to the scapula pelvis, and completes the mechanical test on the stability of the shoulder joint specimen.
Description
Technical Field
The invention relates to an auxiliary device for a tensile experiment, in particular to a device for measuring the stability of a shoulder joint specimen. The device is designed on the basis of the existing MTS material testing machine.
Background
The shoulder joint is the most flexible joint of the human body, is composed of a humeral head and a glenoid of a scapula, and is a typical ball-and-socket joint. The glenoid is small and shallow with a glenoid lip attached to the rim to increase the depth of the glenoid; the joint capsule is thin and loose, and the long head tendon of biceps brachii passes through the capsule; the coracoid humeral ligament, coracoid shoulder ligament and tendon are arranged outside the joint capsule to strengthen the stability of the joint capsule, and only the anterior lower part of the joint capsule has no ligament or muscle reinforcement and is the weakest, so when the shoulder joint is dislocated, the humeral head is usually dislocated from the anterior lower part, and the dislocated posterior glenohumeral ligament-labrum complex, glenoid anterior inferior border sclerotin and other mechanisms can be damaged.
Measuring the stability of the shoulder joint can clarify the function of the glenohumeral ligament-labral complex, and has important significance for diagnosis, treatment and rehabilitation of shoulder joint dislocation; measuring the stability of the post-operative shoulder joint allows an objective assessment of the efficacy of the surgical procedure. In the prior art, only anatomical basis exists in the process of creating and improving the operation, the operation is reasonable in anatomical aspect, the anatomical research belongs to morphological research and cannot represent the function, so that the creation and the improvement of the operation only based on the anatomical basis have great blindness, the effect of the operation can be verified only by clinical research, and unnecessary high risk is brought to patients. Therefore, a set of measuring equipment for measuring the stability of the shoulder joint can provide a scientific research platform and an objective basis for the creation and improvement of the operation method, avoid the blindness of the operation and have great scientific research and clinical values.
The shoulder joint has a complex structure, particularly, the scapula is irregular in shape, the requirement on position adjustment is high in the testing process, the existing mechanical testing equipment cannot meet the requirement, no professional mass production equipment exists in the world, and all the used testing equipment is developed and customized by researchers. At present, the ideal test equipment is a robot/universal load torque sensor test system, which is developed and applied in some foreign laboratories, but the system is expensive, has complex software program, needs professional personnel to operate, and is not beneficial to popularization. How to establish a shoulder joint stability testing arrangement under existing condition has important meaning.
The MTS material testing machine is a device for measuring the mechanical property of a measured object, which is produced by MTS company in America, is widely applied to scientific research and engineering, and can accurately load and measure the moving distance in the vertical direction. This patent application carries out research and development on MTS material testing machine's basis, designs one kind and can satisfy shoulder joint stability test requirement, realizes shoulder joint stability measuring device.
Disclosure of Invention
In order to realize the test of the stability of the shoulder joint specimen, the invention designs a device for realizing the stability measurement of the shoulder joint on the basis of an MTS material testing machine. The device comprises an MTS material testing machine, a humerus shaft fixing mechanism and a scapula fixing mechanism, wherein the humerus shaft fixing mechanism is installed on a moving end clamp head of the MTS material testing machine, and the scapula fixing mechanism is installed on a workbench of the MTS material testing machine. And quantitatively loading the humeral shaft by moving the clamping head through an MTS (maximum temperature stress) testing machine, and measuring the displacement distance of the humeral head relative to the scapula pelvis to finish the mechanical test on the stability of the shoulder joint specimen.
The invention designs a device for realizing shoulder joint stability measurement, which is characterized in that: the device comprises an MTS material testing machine, a humerus shaft fixing mechanism (1) and a scapula fixing mechanism (2), wherein the humerus shaft fixing mechanism (1) is arranged on a fixing clamp (3) at the clamping end of the MTS material testing machine through one end of an A connecting rod (1A), and a translation adjusting frame (2C) of the scapula fixing mechanism (2) is fixed on a workbench of the MTS material testing machine; the humeral shaft fixing mechanism (1) is connected with the scapula fixing mechanism (2) through a mounted shoulder joint specimen;
the humerus shaft fixing mechanism (1) consists of an A connecting rod (1A), a B connecting rod (1B), a pitching adjusting frame (1C) and a circular clamp (1D); the threaded rod section end of the connecting rod A (1A) is connected in a threaded hole of a transverse plate (1C 1) of the pitching adjusting frame (1C) through threads; the threaded rod section end of the connecting rod B (1B) is arranged in a threaded hole A (1C 4) of a middle block (1C 5) of the pitching adjusting frame (1C), and the polished rod section end of the connecting rod B (1B) is fixed in a through hole at one end of the circular clamp (1D) through a pin (1D 1); the pitching adjusting frame (1C) comprises a transverse plate (1C 1), an A vertical plate (1C 2), a B vertical plate (1C 3), an A threaded hole (1C 4), a middle block (1C 5), a pre-tightening screw (1C 6) and a clamping plate (1C 7);
a B threaded hole for fixing the threaded rod section end of the connecting rod A (1A) in a threaded manner is formed in the upper plate surface of the transverse plate (1C 1), and an A vertical plate (1C 2) and a B vertical plate (1C 3) which are arranged in parallel are respectively fixed at two ends of the lower plate surface of the transverse plate (1C 1); a clamping plate (1C 7) is fixed on the outer side of the vertical plate (1C 3) B;
a through hole used for installing one end of a D connecting rod (1C 52) on the middle block (1C 5) is formed in the vertical plate (1C 2) A;
a through hole for installing one end of a C connecting rod (1C 51) on the middle block (1C 5) is formed in the vertical plate (1C 3) B;
the middle block (1C 5) is provided with a threaded hole A (1C 4) for fixing the threaded rod section end of the connecting rod B (1B) in a threaded manner, and the two ends of the middle block (1C 5) are respectively provided with a connecting rod C (1C 51) and a connecting rod D (1C 52); one end of the C connecting rod (1C 51) penetrates through a through hole in the vertical plate (1C 3) B and then is placed in a U-shaped groove (1C 71) of the clamping plate (1C 7); one end of the D connecting rod (1C 52) is arranged in a through hole of the A vertical plate (1C 2);
a U-shaped groove (1C 71) used for installing one end of a C connecting rod (1C 51) on the middle block (1C 5) is arranged on the clamping plate (1C 7); a B threaded hole for a pre-tightening screw (1C 6) to pass through is formed in the side plate surface of the clamping plate (1C 7), and the B threaded hole is formed in the U-shaped groove (1C 71); the U-shaped groove (1C 71) on the clamping plate (1C 7) is clamped through a pre-tightening screw (1C 6), so that the C connecting rod (1C 51) cannot slide down from the U-shaped groove (1C 71);
the A vertical plate (1C 2) and the B vertical plate (1C 3) are placed in parallel and fixed at two ends of the transverse plate (1C 1), so that the A vertical plate (1C 2), the B vertical plate (1C 3) and the transverse plate (1C 1) form a U-shaped mounting frame; the U-shaped mounting frame is beneficial to hanging and mounting the middle block (1C 5), and also facilitates the adjustment of the pitch angle of the connecting rod (1B);
one end of the circular clamp (1D) is provided with a blind hole cavity A (1D 2), the other end of the circular clamp (1D) is provided with a blind hole cavity B (1D 3), and a pin hole (1D 4) for placing a pin (1D 1) is formed in the blind hole cavity B (1D 3) section; the blind hole cavity A (1D 2) is used for installing an upper shoulder joint specimen and then pouring bone cement into the upper shoulder joint specimen to enable the shoulder joint specimen and the circular clamp (1D) to form a whole;
the scapula fixing mechanism (2) consists of a triangular clamp (2A), a rotating frame (2B), a translation adjusting frame (2C) and a supporting connecting rod (2D);
the triangular clamp (2A) consists of a triangular upper cover plate (2A 1), a triangular lower support plate (2A 2) and an upper hollow cylinder (2A 3); three corners of the triangular upper cover plate (2A 1) are respectively provided with an AA threaded hole (2A 1A), an AB threaded hole (2A 1B) and an AC threaded hole (2A 1C); three corners of the triangular lower supporting plate (2A 2) are respectively provided with an AA through hole (2A 2A), an AB through hole (2A 2B) and an AC through hole (2A 2C); one end of the AA screw (2A 5) penetrates through the AA through hole (2A 2A) and then is in threaded connection with the AA threaded hole (2A 1A); one end of the AB screw (2A 6) penetrates through the AB through hole (2A 2B) and then is in threaded connection with the AB threaded hole (2A 1B); one end of the AC screw (2A 7) is threaded in the AC threaded hole (2A 1C) after passing through the AC through hole (2A 2C); an AD through hole (2A 31) is formed in the upper hollow cylinder (2A 3), and the AD through hole (2A 31) is used for an AA locking nail (2A 4) to penetrate through; the lower end of the upper hollow cylinder (2A 3) is arranged in a BA blind hole (2B 1A) of an upper sleeve (2B 1C) of the rotating frame (2B);
the rotating frame (2B) comprises an upper connecting seat (2B 1), a lower connecting seat (2B 2), a cross connecting piece (2B 3), a vertical plate and a clamping plate; the cross connecting piece (2B 3) is a spherical hinge mechanism; the A connecting end (2B 3A) of the cross connecting piece (2B 3) is movably connected with a BA vertical plate (2B 4), and the B connecting end (2B 3B) of the cross connecting piece (2B 3) is movably connected with a BB vertical plate (2B 5);
the C connecting end (2B 3C) of the cross connecting piece (2B 3) penetrates through a through hole in a BC vertical plate (2B 6) and then is placed in an opening through hole of a BA clamping plate (2B 8), and the opening is locked through a BA long screw (2B 81), so that the C connecting end (2B 3C) of the cross connecting piece (2B 3) and the BA clamping plate (2B 8) are fixed; the BC vertical plate (2B 6) and the BA clamping plate (2B 8) are fixed together through screws, and the BC vertical plate (2B 6) is fixed on one end of the BB transverse plate (2B 2D);
the D connecting end (2B 3D) of the cross connecting piece (2B 3) penetrates through a through hole in a BD vertical plate (2B 7) and then is placed in an opening through hole of a BB clamping plate (2B 9), and the opening is locked through a BB long screw (2B 91), so that the D connecting end (2B 3D) of the cross connecting piece (2B 3) and the BB clamping plate (2B 9) are fixed; the BD vertical plate (2B 7) and the BB clamping plate (2B 9) are fixed together through screws, and the BD vertical plate (2B 7) is fixed to the other end of the BB transverse plate (2B 2D);
an upper sleeve (2B 1C) is arranged on a BA transverse plate (2B 1D) of the upper connecting seat (2B 1), a BA through hole (2B 1B) for an AD screw (2A 4) to pass through is arranged on the upper sleeve (2B 1C), and a BA blind hole (2B 1A) for placing one end of an upper sleeve (2A 3) of the triangular clamp (2A) is arranged in the middle of the upper sleeve (2B 1C); one end of the AD screw (2A 4) penetrates through the BA through hole (2B 1B) and the AD through hole (2A 31) in sequence, and the end part of the AD screw (2A 4) is propped against the inner wall of the tense BA blind hole (2B 1A), so that the aim of fixedly installing the upper hollow cylinder (2A 3) on the upper connecting seat (2B 1) through the AD screw (2A 4) is fulfilled;
a BB transverse plate (2B 2D) of the lower connecting seat (2B 2) is provided with a lower sleeve (2B 2C), the lower sleeve (2B 2C) is provided with a BB through hole (2B 2B) for an AD screw (2A 4) to pass through, and the middle part of the lower sleeve (2B 2C) is provided with a BB blind hole (2B 2A) for placing one end of the supporting connecting rod (2D); one end of the AD screw (2A 4) penetrates through the BB through hole (2B 2B) and the AD through hole (2A 31) in sequence, and the end of the AD screw (2A 4) is pressed against the inner wall of the BB blind hole (2B 2A), so that the aim of fixedly mounting one end of the upper support connecting rod (2D) on the lower connecting seat (2B 2) through the AD screw (2A 4) is fulfilled; the structure of the lower connecting seat (2B 2) is the same as that of the upper connecting seat (2B 1), and the lower connecting seat is vertically installed along the Z axis in assembly;
the translation adjusting frame (2C) is composed of a guide rail, a sliding block, an upper platform (2C 1), a middle platform (2C 2) and a lower platform (2C 3); after the displacement along the X-axis direction of the coordinate system O-XYZ is adjusted, the position locking A screw (2C 8) penetrates through a CA threaded hole (2C 11) on the upper platform (2C 1), and the end face of the position locking A screw (2C 8) is tightly propped against the upper panel of the middle platform (2C 2), so that the upper platform (2C 1) is locked to slide relative to the middle platform (2C 2); after the displacement along the Y-axis direction of the coordinate system O-XYZ is adjusted, the screw (2C 9) passes through a CB threaded hole (2C 21) on the middle platform (2C 2) through the position locking B, and the end face of the screw (2C 9) is tightly propped against the upper panel of the lower platform (2C 3), so that the sliding of the middle platform (2C 2) relative to the lower platform (2C 3) is locked;
the upper end of the support connecting rod (2D) is a small cylindrical section (2D 1), and the upper end part of the small cylindrical section (2D 1) is provided with an AE threaded hole (2D 11) for mounting an AE screw (2D 3); the lower end of the support connecting rod (2D) is a large cylindrical section (2D 2); the end panel of the large cylindrical section (2D 2) of the support connecting rod (2D) is contacted with the upper plane plate (2C 1) of the translation adjusting frame (2C).
The device for realizing shoulder joint stability measurement has the advantages that:
(1) the device is of a split structure, namely the humerus shaft fixing mechanism (1) and the scapula fixing mechanism (2) are connected through the shoulder joint specimen, so that the shoulder joint specimen is favorably fixed without damaging the shoulder joint specimen.
(2) The humeral shaft fixing mechanism (1) can realize the anterior-inferior displacement of the humeral head of a shoulder joint specimen relative to a scapula pelvis, namely shoulder joint dislocation, and simultaneously accurately measure the humeral head displacement distance, namely the shoulder joint dislocation degree, under the condition of the output force of an MTS material testing machine.
(3) According to the invention, the scapula is roughly positioned on the horizontal plane through the movement and fixation of the scapula fixing mechanism (2) on the work table of the MTS material tester; fine positioning of the horizontal plane position of the scapula is realized by moving the translation adjusting frame (2C) on the horizontal plane along the X-axis direction and the Y-axis direction; the scapula can be positioned in rotation by rotating the rotating frame (2B) along the X axis and the Y axis. Namely, the scapula fixing mechanism can realize the position adjustment of two degrees of freedom on the horizontal plane and the rotation position adjustment along the X axis and the Y axis, and fully meets the requirement of the test on the position of the scapula.
(4) According to the invention, the adjustment of the shoulder joint abduction angle is realized by adjusting the position of the scapula fixing mechanism (2) on the work bench of the MTS material testing machine and correspondingly finely adjusting the translation adjusting frame (2C) and the rotating frame (2B).
(5) In the invention, the included angle between the connecting rod (1B) and the horizontal plane is changed by adjusting the pitching adjusting frame (1C), and the included angle between the humeral shaft and the horizontal plane is adjusted, thereby meeting the requirement on the extending position of the shoulder joint in the test process.
(6) The scapula is extruded and fixed by the three bolts on the triangular clamp (2A) and the upper clamping piece and the lower clamping piece of the triangular clamp, so that the scapula and the triangular clamp (2A) are rigidly fixed, and the test accuracy is improved.
(7) In the invention, the humeral shaft is inserted into the blind hole cavity (1D 2) in the circular clamp (1D), then resin (such as bone cement) is poured, and after solidification, rigid fixation between the humeral shaft and the humeral shaft fixing mechanism can be realized, thereby improving the accuracy of the test.
Drawings
Fig. 1 is an external structural view of a device for realizing shoulder joint stability measurement designed by the invention.
Fig. 1A is another external structural view of the device for measuring the stability of the shoulder joint designed by the invention.
Fig. 2 is a block diagram of a pitch horn designed in accordance with the present invention.
Fig. 2A is a block diagram of another perspective of a pitch tower designed according to the present invention.
Fig. 2B is a block diagram of a circular end clamp in a pitch cradle designed according to the present invention.
Fig. 3 is an exploded view of a triangular clip designed according to this invention.
Fig. 4 is a structural view of a rotating frame designed by the invention.
Fig. 4A is an exploded view of a swivel mount designed according to the present invention.
Fig. 4B is a picture of a turret designed according to this invention.
Fig. 4C is another perspective view of the turret of the present invention.
Fig. 5 is a structural view of a translational adjustment bracket designed by the invention.
Fig. 5A is an exploded view of a pan carriage design of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and fig. 1A, the device for measuring shoulder joint stability according to the present invention comprises an MTS material testing machine, a humeral shaft fixing mechanism 1 and a scapula fixing mechanism 2; the humeral shaft fixing mechanism 1 is arranged on a clamping fixing clamp 3 at the moving end of an MTS material tester through one end of an A connecting rod 1A, can realize the adjustment of the rotation angle of the humeral shaft, and finishes the loading of the humeral shaft along the vertical direction under the action of the MTS material tester; the translation adjusting frame 2C of the scapula fixing mechanism 2 is fixed on a workbench of an MTS material testing machine, so that accurate adjustment of the position of the scapula and adjustment of the abduction angle of the shoulder joint are completed, and the testing requirements are met. The humeral shaft fixing mechanism 1 and the scapula fixing mechanism 2 are connected through a shoulder joint specimen, so that the shoulder joint specimen is fixed conveniently without being damaged.
The humerus shaft fixing mechanism 1 is composed of an A connecting rod 1A, a B connecting rod 1B, a pitching adjusting frame 1C and a circular clamp 1D. In the invention, the humeral shaft fixing mechanism 1 can realize the anterior-inferior displacement of the humeral head of the shoulder joint specimen relative to the scapula pelvis, namely the shoulder joint dislocation, and simultaneously accurately measure the displacement distance of the humeral head, namely the shoulder joint dislocation degree, under the condition of the output force of the MTS material testing machine.
The scapula fixing mechanism 2 is composed of a triangular clamp 2A, a rotating frame 2B, a translation adjusting frame 2C and a supporting connecting rod 2D. In the invention, the scapula fixing mechanism 2 moves and fixes on the work bench of the MTS material tester to realize the coarse positioning of the scapula on the horizontal plane; fine positioning of the horizontal position of the scapula is realized by moving the translation adjusting frame 2C on the horizontal plane along the X-axis direction and the Y-axis direction; the rotation of the rotating frame 2B along the X axis and the Y axis realizes the positioning of the scapula in the aspect of rotation. Namely, the scapula fixing mechanism can realize the position adjustment of two degrees of freedom on the horizontal plane and the rotation position adjustment along the X axis and the Y axis. Fully meet the requirements of the test on the position of the scapula.
A connecting rod 1A
Referring to fig. 1, 1A, 2 and 2A, one end of the a connecting rod 1A is a polished rod section, and the other end of the a connecting rod 1A is a threaded rod section with external threads. The polished rod section end of the connecting rod A1A is arranged on a fixing clamp 3 of the clamping end of the MTS material experiment machine, and the threaded rod section end of the connecting rod A1A is connected in a threaded hole of a transverse plate 1C1 of the pitching adjusting frame 1C through threads. In the invention, the distance of the elevation adjusting frame 1C in the Z-axis direction (namely the distance between a shoulder joint specimen and a workbench) can be roughly adjusted by clamping the vertical distance of the polished rod section of the connecting rod 1A through the clamping and fixing clamp 3 at the moving end of the MTS material testing machine.
Referring to fig. 1, 1A, 2 and 2A, one end of the B connecting rod 1B is a polished rod section, and the other end of the B connecting rod 1B is a threaded rod section with external threads. The threaded rod section end of the B connecting rod 1B is arranged in a threaded hole 1C 4A of a middle block 1C5 of the pitching adjusting frame 1C, and the polished rod section end of the B connecting rod 1B is fixed in a through hole at one end of the circular clamp 1D through a pin 1D 1. In the present invention, the unique fixed length (preferably not more than 2 cm) of the B-link 1B is designed to achieve a distance for micro-displacement movement of the humeral stem fixation mechanism 1 to approach the trigonal jig 2A of the scapula fixation mechanism 2, and therefore, the B-link 1B can serve as a measurement tool when roughly installing the humeral stem fixation mechanism 1. In the invention, the short-length B connecting rod 1B does not shake under the loading force test condition, which is beneficial to the stability measurement of shoulder joint dislocation of the installed shoulder joint specimen.
Pitching adjusting frame 1C
Referring to fig. 1, 1A, 2 and 2A, the pitching adjusting frame 1C includes a horizontal plate 1C1, a vertical plate 1C2, a vertical plate 1C3, a threaded hole 1C4, a middle block 1C5, a pre-tightening screw 1C6 and a clamping plate 1C7;
the upper plate surface of the transverse plate 1C1 is provided with a B threaded hole (shown in figure 1) for fixing the threaded rod section end of the A connecting rod 1A in a threaded manner, and the two ends of the lower plate surface of the transverse plate 1C1 are respectively fixed with an A vertical plate 1C2 and a B vertical plate 1C3 which are placed in parallel; a clamping plate 1C7 is fixed on the outer side of the vertical plate 1C3;
a through hole for installing one end of a D connecting rod 1C52 on the middle block 1C5 is formed in the vertical plate A1C 2;
a through hole for installing one end of a C connecting rod 1C51 on the middle block 1C5 is formed in the vertical plate 1C 3B;
the middle block 1C5 is provided with a threaded hole A1C 4 (shown in figure 2A) for fixing the threaded rod section end of the connecting rod B1B in a threaded manner, and the two ends of the middle block 1C5 are respectively provided with a connecting rod C1C 51 and a connecting rod D1C 52; one end of the C connecting rod 1C51 passes through a through hole on the vertical plate 1C3 and then is placed in the U-shaped groove 1C71 of the clamping plate 1C7; one end of the D connecting rod 1C52 is arranged in a through hole (shown in figure 1A) of an A vertical plate 1C 2;
a U-shaped groove 1C71 used for installing one end of a C connecting rod 1C51 on the middle block 1C5 is arranged on the clamping plate 1C7; a B threaded hole for a pre-tightening screw 1C6 to penetrate through is formed in the side plate surface of the clamping plate 1C7, and the B threaded hole is formed in the U-shaped groove 1C71; the U-shaped groove 1C71 on the clamping plate 1C7 is clamped by the pre-tightening screw 1C6, so that the C-shaped connecting rod 1C51 does not slide from the U-shaped groove 1C 71.
The A vertical plate 1C2 and the B vertical plate 1C3 are placed in parallel and fixed at two ends of the transverse plate 1C1, so that the A vertical plate 1C2, the B vertical plate 1C3 and the transverse plate 1C1 form a U-shaped mounting frame; this U-shaped mounting is advantageous for hanging the mounting intermediate block 1C5, also making it convenient to adjust the pitch angle of the B connecting rod 1B.
In the invention, the pitching adjusting frame 1C is used for adjusting the pitching angle of the B connecting rod 1B, and since the shoulder joint specimen is fixed in the circular clamp 1D, and the circular clamp 1D is fixed on the polished rod section end of the B connecting rod 1B through the pin 1D1, the pitching adjusting frame 1C finally adjusts the pitching angle of the shoulder joint specimen. The shoulder joint specimen can not be like a rigid structural part, a large load force is applied through an MTS material testing machine, but the load bearing capacity of the shoulder joint specimen meets the requirements of human joints, so that one end of the pitching adjusting frame 1C is movably connected to the vertical plate 1C2, and the other end of the pitching adjusting frame is matched with the side plate 1C7 through the vertical plate 1C3 to prevent the humeral shaft from being lifted too high due to too large pitching twisting, so that the shoulder joint specimen is damaged.
The invention is beneficial to keeping the A transverse plate 1C1 of the pitching adjusting frame 1C on the XOY plane, and realizes the coarse distance adjustment of the pitching adjusting frame 1C in the Z-axis direction of the coordinate system O-XYZ through the A connecting rod 1A.
Referring to fig. 1, 1A and 2B, one end of a circular fixture 1D is provided with a blind hole cavity a 1D2, the other end of the circular fixture 1D is provided with a blind hole cavity B1D 3, and a pin hole 1D4 for placing a pin 1D1 is arranged on the blind hole cavity B1D 3.
In the invention, the blind hole cavity A1D 2 of the circular clamp 1D is used for installing a shoulder joint specimen, and the shoulder joint specimen is circular (the humeral shaft of the shoulder joint is circular), so that after the humeral shaft is placed in the blind hole cavity A1D 2, resin (such as bone cement) is filled and tamped, after solidification, rigid fixation between the humeral shaft and a humeral shaft fixing mechanism can be realized, and the accuracy of the test is improved.
Referring to fig. 1, 1A and 3, the triangular clamp 2A is composed of a triangular upper cover plate 2A1, a triangular lower support plate 2A2 and an upper hollow cylinder 2A 3;
three corners of the triangular upper cover plate 2A1 are respectively provided with an AA threaded hole 2A1A, an AB threaded hole 2A1B and an AC threaded hole 2A1C;
three corners of the triangular lower supporting plate 2A2 are respectively provided with an AA through hole 2A2A, an AB through hole 2A2B and an AC through hole 2A2C;
one end of the AA screw 2A5 penetrates through the AA through hole 2A2A and then is in threaded connection with the AA threaded hole 2A 1A;
one end of the AB screw 2A6 penetrates through the AB through hole 2A2B and then is in threaded connection with the AB threaded hole 2A 1B;
one end of the AC screw 2A7 is screwed into the AC screw hole 2A1C after passing through the AC through hole 2 A2C.
And an AD through hole 2A31 is formed in the upper hollow cylinder 2A3, and the AD through hole 2A31 is used for the AA locking nail 2A4 to penetrate through. The lower end of the upper hollow cylinder 2A3 is placed in the BA blind hole 2B1A of the upper sleeve 2B1C of the rotating frame 2B.
In the invention, the distance between the triangular upper cover plate 2A1 and the triangular lower support plate 2A2 for clamping the shoulder joint specimen is adjusted by adjusting the distance between the triangular upper cover plate 2A1 and the AA screw 2A5, the AB screw 2A6 and the AC screw 2A7, so that the shoulder joint specimen is clamped. As the scapulae are irregular in shape, the scapulae are fixed by the triangular clamp with the upper and lower flat plate structures, and the scapulae with different sizes are clamped by adjusting the distance of the triangular upper cover plate 2A1 on the three screws.
Rotating frame 2B
Referring to fig. 1, 1A, 4B and 4C, the rotating frame 2B includes an upper connecting seat 2B1, a lower connecting seat 2B2, a cross connecting member 2B3, and risers (2B 4, 2B5, 2B6, 2B 7) and clamping plates (2B 8, 2B 9) connected to the cross connecting member 2B 3.
The cross-shaped connecting piece 2B3 is a spherical hinge mechanism. The A connecting end 2B3A of the cross connecting piece 2B3 is movably connected with a BA vertical plate 2B4, and the B connecting end 2B3B of the cross connecting piece 2B3 is movably connected with a BB vertical plate 2B 5; in the present invention, the a connection end 2B3A and the B connection end 2B3B are each rotated about a virtual center point in the respective riser through hole.
A C connecting end 2B3C of the cross connecting piece 2B3 penetrates through a through hole in a BC vertical plate 2B6 and then is placed in an opening through hole of a BA clamping plate 2B8, and an opening is locked through a BA long screw 2B81, so that the C connecting end 2B3C of the cross connecting piece 2B3 is fixed with the BA clamping plate 2B 8; the BC vertical plate 2B6 and the BA clamping plate 2B8 are fixed together through screws, and the BC vertical plate 2B6 is fixed on one end of the BB transverse plate 2B 2D; under the condition of the output force of the MTS material testing machine, the B connecting end 2B3B of the cross connecting piece 2B3 is a movable end, and the C connecting end 2B3C symmetrical to the B connecting end 2B3B is restrained by the BA clamping plate 2B8, so that the torsion is blocked, the torsion in a circumferential mode cannot be formed, and the torsion of a third circle is formed.
The D connecting end 2B3D of the cross connecting piece 2B3 penetrates through a through hole in a BD vertical plate 2B7 and then is placed in an open through hole of a BB clamping plate 2B9, and the opening is locked through a BB long screw 2B91, so that the fixing of the D connecting end 2B3D of the cross connecting piece 2B3 and the BB clamping plate 2B9 is realized; the BD vertical plate 2B7 and the BB clamping plate 2B9 are fixed together through screws, and the BD vertical plate 2B7 is fixed to the other end of the BB transverse plate 2B 2D; under the condition of the output force of the MTS material testing machine, the A connecting end 2B3A of the cross connecting piece 2B3 is a movable end, and the D connecting end 2B3D symmetrical to the A connecting end 2B3A is restrained by the BB clamping plate 2B9, so that the torsion is blocked, the torsion in a circumferential mode is not formed, and the torsion of a third circle is formed. The BA clamping plate 2B8 and the BB clamping plate 2B9 are used to lock the adjusted scapula position.
An upper sleeve 2B1C is arranged on a BA transverse plate 2B1D of the upper connecting seat 2B1, a BA through hole 2B1B for an AD screw 2A4 to pass through is arranged on the upper sleeve 2B1C, and a BA blind hole 2B1A for placing one end of an upper sleeve 2A3 of the triangular clamp 2A is arranged in the middle of the upper sleeve 2B 1C; AD screw 2A 4's one end passes BA through-hole 2B1B, AD through-hole 2A31 (sets up on last hollow cylinder 2A 3) back in order, and the inner wall of AD screw 2A4 tip top nervous BA blind hole 2B1A reaches the purpose of hollow cylinder 2A3 at last connecting seat 2B1 through AD screw 2A4 fixed mounting. A BA vertical plate 2B4 and a BD vertical plate 2B7 are fixed on the other panel of the BA transverse plate 2B1D of the upper connecting seat 2B1, and the BA vertical plate 2B4 and the BD vertical plate 2B7 are placed in parallel.
The structure of the lower connecting seat 2B2 is the same as that of the upper connecting seat 2B1, and the lower connecting seat is mounted up and down along the Z axis in assembly. A lower sleeve 2B2C is arranged on a BB transverse plate 2B2D of the lower connecting seat 2B2, a BB through hole 2B2B for an AD screw 2A4 to penetrate through is arranged on the lower sleeve 2B2C, and a BB blind hole 2B2A for placing one end of the supporting connecting rod 2D is arranged in the middle of the lower sleeve 2B 2C; one end of the AD screw 2A4 penetrates through the BB through hole 2B2B and the AD through hole 2A31 in sequence, and the end part of the AD screw 2A4 abuts against the inner wall of the BB blind hole 2B2A in tension, so that the aim of fixedly mounting the lower connecting seat 2B2 at one end of the upper supporting connecting rod 2D through the AD screw 2A4 is fulfilled. BB vertical plates 2B5 and BC vertical plates 2B6 are fixed on the other panel of the BB transverse plate 2B2D of the lower connecting seat 2B2, and the BB vertical plates 2B5 and the BC vertical plates 2B6 are placed in parallel.
In the invention, the triangular clamp 2A is matched with the rotating frame 2B in structure, so that the shoulder joint specimen can be favorably measured under the condition of receiving the output force of the MTS material testing machine. Meanwhile, the designed rotating frame 2B rotates back by the force of the spherical hinge mechanism, so that the torsion rotation is only one third of the torsion rotation.
Referring to fig. 1, 1A, 5, and 5A, the translational adjustment frame 2C is composed of a guide rail (X-axis guide rail, Y-axis guide rail), a slider, and a platform (i.e., an upper platform 2C1, a middle platform 2C2, and a lower platform 2C 3).
The upper platform 2C1 is provided with a CA threaded hole 2C11 for the position locking a screw 2C8 to pass through.
The middle platform 2C2 is provided with a CB threaded hole 2C21 for the position locking B screw 2C9 to pass through.
The upper stage 2C1, the middle stage 2C2, and the lower stage 2C3 are disposed in parallel.
The Y-axis direction A guide rail 2C4 and the Y-axis direction B guide rail 2C5 are placed in parallel along the Y-axis direction of a coordinate system O-XYZ and are fixed on an upper panel of the lower platform 2C3 through screws; the Y-axis A guide rail 2C4 is provided with an A slide block 2C41 in a sliding way, and the A slide block 2C41 is fixed on the lower panel of the middle platform 2C2 through a screw; a B slide block 2C51 is arranged on the Y-axis B guide rail 2C5 in a sliding way, and the B slide block 2C51 is fixed on the lower panel of the middle platform 2C2 through screws.
The X-axis A guide rail 2C6 and the X-axis B guide rail 2C7 are placed in parallel along the X-axis direction of a coordinate system O-XYZ and are fixed on an upper panel of the middle platform 2C2 through screws; a C slide block 2C61 is arranged on the X axial A guide rail 2C6 in a sliding way, and the C slide block 2C61 is fixed on the lower panel of the upper platform 2C1 through a screw; the X-axis B guide rail 2C7 is provided with a D slide block 2C71 in a sliding way, and the D slide block 2C71 is fixed on the lower panel of the upper platform 2C1 through screws.
In the invention, after the displacement along the X-axis direction of the coordinate system O-XYZ is adjusted, the position locking A screw 2C8 passes through the CA threaded hole 2C11 on the upper platform 2C1, and the end surface of the position locking A screw 2C8 is tightly propped against the upper panel of the middle platform 2C2, so that the upper platform 2C1 is locked to slide relative to the middle platform 2C 2. After the displacement along the Y-axis direction of the coordinate system O-XYZ is adjusted, the position locking B screw 2C9 penetrates through the CB threaded hole 2C21 on the middle platform 2C2, and the end face of the position locking B screw 2C9 is tightly propped against the upper panel of the lower platform 2C3, so that the sliding of the middle platform 2C2 relative to the lower platform 2C3 is locked.
In the invention, the fine positioning of the horizontal position of the scapula is realized by the movement of the translation adjusting frame 2C on the horizontal plane along the X-axis direction and the Y-axis direction; the scapula is positioned in rotation by the rotation of the rotating frame 2B along the X axis and the Y axis. Namely, the scapula fixing mechanism can realize the position adjustment of two degrees of freedom on the horizontal plane and the rotation position adjustment along the X axis and the Y axis, and fully meets the requirement of the test on the position of the scapula.
Referring to fig. 1, 1A, 5 and 5A, the upper end of the support link 2D is a small cylindrical section 2D1, and the upper end of the small cylindrical section 2D1 is provided with an AE threaded hole 2D11 for mounting an AE screw 2D 3; the lower end of the support connecting rod 2D is a large cylindrical section 2D2; the end face panel of the large cylindrical section 2D2 of the support link 2D is in contact with the upper plane plate 2C1 of the translational adjustment frame 2C.
In the present invention, the support link 2D is designed to be telescopic so as to facilitate adjustment of the height between the triangular jig 2A and the circular jig 1D in the humeral stem fixing mechanism 1.
The invention designs a device which is arranged on an MTS material testing machine and used for realizing shoulder joint stability measurement, and the device can realize mechanical property test of a shoulder joint specimen. The device with the pitching-lifting-swinging postures can measure the displacement distance of the humeral head relative to the scapula pelvis, and achieves the technical effect of realizing the mechanical property test of the shoulder joint specimen on the MTS material testing machine.
Claims (1)
1. The utility model provides a realize shoulder joint stability measuring device which characterized in that: the device comprises an MTS material testing machine, a humerus shaft fixing mechanism (1) and a scapula fixing mechanism (2), wherein the humerus shaft fixing mechanism (1) is installed on a fixing clamp (3) at the clamping end of the MTS material testing machine through one end of an A connecting rod (1A), and a translation adjusting frame (2C) of the scapula fixing mechanism (2) is fixed on a workbench of the MTS material testing machine; the humeral shaft fixing mechanism (1) is connected with the scapula fixing mechanism (2) through a mounted shoulder joint specimen;
the humerus shaft fixing mechanism (1) consists of an A connecting rod (1A), a B connecting rod (1B), a pitching adjusting frame (1C) and a circular clamp (1D); the threaded rod section end of the connecting rod A (1A) is connected in a threaded hole of a transverse plate (1C 1) of the pitching adjusting frame (1C) through threads; the threaded rod section end of the connecting rod B (1B) is arranged in a threaded hole A (1C 4) of a middle block (1C 5) of the pitching adjusting frame (1C), and the polished rod section end of the connecting rod B (1B) is fixed in a through hole at one end of the circular clamp (1D) through a pin (1D 1); the pitching adjusting frame (1C) comprises a transverse plate (1C 1), an A vertical plate (1C 2), a B vertical plate (1C 3), an A threaded hole (1C 4), a middle block (1C 5), a pre-tightening screw (1C 6) and a clamping plate (1C 7);
the distance of the pitching adjusting frame (1C) in the Z-axis direction is roughly adjusted by adjusting the distance of the polished rod section of the connecting rod (1A) clamped on the fixing clamp (3);
the length of the connecting rod (1B) is not more than 2 cm;
the upper plate surface of the transverse plate (1C 1) is provided with a C threaded hole for fixing the threaded rod section end of the connecting rod A (1A) in a threaded manner, and the two ends of the lower plate surface of the transverse plate (1C 1) are respectively fixed with a vertical plate A (1C 2) and a vertical plate B (1C 3) which are placed in parallel; a clamping plate (1C 7) is fixed on the outer side of the vertical plate (1C 3) B;
a through hole used for installing one end of a D connecting rod (1C 52) on the middle block (1C 5) is formed in the vertical plate (1C 2) A;
a through hole for installing one end of a C connecting rod (1C 51) on the middle block (1C 5) is formed in the vertical plate (1C 3) B;
the middle block (1C 5) is provided with a threaded hole A (1C 4) for fixing the threaded rod section end of the connecting rod B (1B) in a threaded manner, and the two ends of the middle block (1C 5) are respectively provided with a connecting rod C (1C 51) and a connecting rod D (1C 52); one end of the C connecting rod (1C 51) penetrates through a through hole in the vertical plate (1C 3) B and then is placed in a U-shaped groove (1C 71) of the clamping plate (1C 7); one end of the D connecting rod (1C 52) is arranged in a through hole of the A vertical plate (1C 2);
a U-shaped groove (1C 71) used for installing one end of a C connecting rod (1C 51) on the middle block (1C 5) is arranged on the clamping plate (1C 7); a B threaded hole for a pre-tightening screw (1C 6) to pass through is formed in the side plate surface of the clamping plate (1C 7), and the B threaded hole is formed in the U-shaped groove (1C 71); the U-shaped groove (1C 71) on the clamping plate (1C 7) is clamped through a pre-tightening screw (1C 6), so that the C connecting rod (1C 51) cannot slide down from the U-shaped groove (1C 71);
the A vertical plate (1C 2) and the B vertical plate (1C 3) are placed in parallel and fixed at two ends of the transverse plate (1C 1), so that the A vertical plate (1C 2), the B vertical plate (1C 3) and the transverse plate (1C 1) form a U-shaped mounting frame; the U-shaped mounting frame is beneficial to hanging and mounting the middle block (1C 5), and also facilitates the adjustment of the pitch angle of the connecting rod (1B);
one end of the circular clamp (1D) is provided with a blind hole cavity A (1D 2), the other end of the circular clamp (1D) is provided with a blind hole cavity B (1D 3), and a pin hole (1D 4) for placing a pin (1D 1) is formed in the blind hole cavity B (1D 3) section; the blind hole cavity A (1D 2) is used for installing an upper shoulder joint specimen and then pouring bone cement into the upper shoulder joint specimen to enable the shoulder joint specimen and the circular clamp (1D) to form a whole;
the scapula fixing mechanism (2) consists of a triangular clamp (2A), a rotating frame (2B), a translation adjusting frame (2C) and a supporting connecting rod (2D);
the triangular clamp (2A) consists of a triangular upper cover plate (2A 1), a triangular lower support plate (2A 2) and an upper hollow cylinder (2A 3); three corners of the triangular upper cover plate (2A 1) are respectively provided with an AA threaded hole (2A 1A), an AB threaded hole (2A 1B) and an AC threaded hole (2A 1C); three corners of the triangular lower supporting plate (2A 2) are respectively provided with an AA through hole (2A 2A), an AB through hole (2A 2B) and an AC through hole (2A 2C); one end of the AA screw (2A 5) penetrates through the AA through hole (2A 2A) and then is in threaded connection with the AA threaded hole (2A 1A); one end of the AB screw (2A 6) penetrates through the AB through hole (2A 2B) and then is in threaded connection with the AB threaded hole (2A 1B); one end of the AC screw (2A 7) is threaded in the AC threaded hole (2A 1C) after passing through the AC through hole (2A 2C); an AD through hole (2A 31) is formed in the upper hollow cylinder (2A 3), and the AD through hole (2A 31) is used for an AD screw (2A 4) to penetrate through; the lower end of the upper hollow cylinder (2A 3) is arranged in a BA blind hole (2B 1A) of an upper sleeve (2B 1C) of the rotating frame (2B);
the rotating frame (2B) comprises an upper connecting seat (2B 1), a lower connecting seat (2B 2), a cross connecting piece (2B 3), a vertical plate and a clamping plate; the cross connecting piece (2B 3) is a spherical hinge mechanism; the A connecting end (2B 3A) of the cross connecting piece (2B 3) is movably connected with a BA vertical plate (2B 4), and the B connecting end (2B 3B) of the cross connecting piece (2B 3) is movably connected with a BB vertical plate (2B 5); the rotating frame (2B) realizes the torsion rotation of one third of a circle;
the C connecting end (2B 3C) of the cross connecting piece (2B 3) penetrates through a through hole in a BC vertical plate (2B 6) and then is placed in an opening through hole of a BA clamping plate (2B 8), and the opening is locked through a BA long screw (2B 81), so that the C connecting end (2B 3C) of the cross connecting piece (2B 3) is fixed with the BA clamping plate (2B 8); the BC vertical plate (2B 6) and the BA clamping plate (2B 8) are fixed together through screws, and the BC vertical plate (2B 6) is fixed on one end of the BB transverse plate (2B 2D);
the D connecting end (2B 3D) of the cross connecting piece (2B 3) penetrates through a through hole in a BD vertical plate (2B 7) and then is placed in an opening through hole of a BB clamping plate (2B 9), and the opening is locked through a BB long screw (2B 91), so that the D connecting end (2B 3D) of the cross connecting piece (2B 3) is fixed with the BB clamping plate (2B 9); the BD vertical plate (2B 7) and the BB clamping plate (2B 9) are fixed together through screws, and the BD vertical plate (2B 7) is fixed to the other end of the BB transverse plate (2B 2D);
the BA transverse plate (2B 1D) of the upper connecting seat (2B 1) is provided with the upper sleeve (2B 1C), the upper sleeve (2B 1C) is provided with a BA through hole (2B 1B) for an AD screw (2A 4) to pass through, and the middle part of the upper sleeve (2B 1C) is provided with a BA blind hole (2B 1A) for placing one end of an upper hollow cylinder (2A 3) of the triangular clamp (2A); one end of the AD screw (2A 4) penetrates through the BA through hole (2B 1B) and the AD through hole (2A 31) in sequence, and the end part of the AD screw (2A 4) is tightly propped against the inner wall of the BA blind hole (2B 1A), so that the aim of fixedly mounting the upper hollow cylinder (2A 3) on the upper connecting seat (2B 1) through the AD screw (2A 4) is fulfilled;
a BB transverse plate (2B 2D) of the lower connecting seat (2B 2) is provided with a lower sleeve (2B 2C), the lower sleeve (2B 2C) is provided with a BB through hole (2B 2B) for an AD screw (2A 4) to pass through, and the middle part of the lower sleeve (2B 2C) is provided with a BB blind hole (2B 2A) for placing one end of the supporting connecting rod (2D); one end of the AD screw (2A 4) penetrates through the BB through hole (2B 2B) and the AD through hole (2A 31) in sequence, and the end part of the AD screw (2A 4) is tightly propped against the inner wall of the BB blind hole (2B 2A), so that the purpose that one end of the support connecting rod (2D) is fixedly installed on the lower connecting seat (2B 2) through the AD screw (2A 4) is achieved; the structure of the lower connecting seat (2B 2) is the same as that of the upper connecting seat (2B 1), and the lower connecting seat is vertically installed along the Z axis in assembly;
the translation adjusting frame (2C) is composed of a guide rail, a sliding block, an upper platform (2C 1), a middle platform (2C 2) and a lower platform (2C 3); after the displacement along the X-axis direction of the coordinate system O-XYZ is adjusted, the position locking A screw (2C 8) penetrates through a CA threaded hole (2C 11) on the upper platform (2C 1), and the end face of the position locking A screw (2C 8) is tightly propped against the upper panel of the middle platform (2C 2), so that the upper platform (2C 1) is locked to slide relative to the middle platform (2C 2); after the displacement along the Y-axis direction of the coordinate system O-XYZ is adjusted, the screw (2C 9) passes through a CB threaded hole (2C 21) on the middle platform (2C 2) through the position locking B, and the end face of the screw (2C 9) is tightly propped against the upper panel of the lower platform (2C 3), so that the sliding of the middle platform (2C 2) relative to the lower platform (2C 3) is locked;
the upper end of the supporting connecting rod (2D) is a small cylindrical section (2D 1), and the upper end part of the small cylindrical section (2D 1) is provided with an AE threaded hole (2D 11) for mounting an AE screw (2D 3); the lower end of the support connecting rod (2D) is a large cylindrical section (2D 2); an end face panel of a large cylindrical section (2D 2) of the support connecting rod (2D) is contacted with an upper platform (2C 1) of the translation adjusting frame (2C);
fine positioning of the horizontal position of the scapula is realized by moving the translation adjusting frame (2C) on the horizontal plane along the X-axis direction and the Y-axis direction; the rotation of the rotating frame (2B) along the X axis and the Y axis realizes the positioning of the rotation position of the scapula along the X axis and the Y axis.
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| CN201710700085.8A CN107328709B (en) | 2017-08-16 | 2017-08-16 | Device for realizing shoulder joint stability measurement |
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| CN201710700085.8A CN107328709B (en) | 2017-08-16 | 2017-08-16 | Device for realizing shoulder joint stability measurement |
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| CN109633604A (en) * | 2018-12-29 | 2019-04-16 | 深圳市速腾聚创科技有限公司 | A kind of fixation device of fusion detection system |
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