Device for measuring stability of shoulder joint

Abstract

The invention discloses a device for measuring the stability of a shoulder joint, belongs to the technical field of auxiliary devices for tensile experiments, and can improve the measurement efficiency of the stability of a shoulder joint specimen. Comprising an MTS material testing machine, a humerus shaft fixing mechanism and a shoulder blade fixing mechanism. The humerus shaft fixing mechanism comprises a first humerus adjusting assembly, the first humerus adjusting assembly comprises a first mounting frame, a first worm, a first worm gear, a first connecting shaft, a rotating block, a first connecting rod and a first rocking handle, and the first worm gear is rotatably mounted on the first mounting frame and is engaged and matched with the first worm; one end of the first connecting shaft is fixedly connected with the first worm gear, the other end of the first connecting shaft is rotatably connected to the first mounting frame, and the central axis of the first connecting shaft coincides with the central axis of the first worm gear; the rotating block is fixedly arranged on the first connecting shaft in a sleeving manner; one end of the first connecting rod is arranged on the rotating block, and a humerus fixing clamp is arranged at the other end of the first connecting rod; the first rocking handle is arranged at one end of the first worm.

Description

Technical Field

[0001] The invention relates to the technical field of auxiliary devices for stretching experiments, in particular to a device for measuring shoulder joint stability. Background Art

[0002] The shoulder joint is the most flexible joint in the human body. It is composed of the humeral head and the glenoid cavity of the scapula and is a typical ball-and-socket joint. The glenoid cavity is small and shallow, with a labrum attached to the edge to increase the depth of the glenoid cavity. The joint capsule is thin and loose, with the long head tendon of the biceps brachii passing through it. The coracohumeral ligament, coracoacromial ligament and tendons outside the joint capsule strengthen its stability. Only the anterior and inferior part of the joint capsule is not reinforced by ligaments and muscles and is the weakest. Therefore, when the shoulder joint is dislocated, the humeral head often dislocates from the anterior and inferior part. After dislocation, the inferior glenohumeral ligament-labrum complex, the bone of the anterior and inferior edge of the glenoid cavity and other structures may be damaged.

[0003] Measuring shoulder joint stability can, on the one hand, clarify the function of the inferior glenohumeral ligament-labrum complex of the shoulder joint, which is of great significance for the diagnosis, treatment and rehabilitation of shoulder dislocation; on the other hand, it can objectively evaluate the effectiveness of surgical methods.

[0004] A patent with publication number CN107328709A discloses a device for measuring shoulder joint stability. Although it can quantitatively load the humeral shaft through the mobile chuck of the MTS testing machine, measure the displacement distance of the humeral head relative to the glenoid fossa, and complete the mechanical test of the stability of the shoulder joint specimen. However, each time the scapula or humerus position is adjusted, the corresponding screws must be loosened before the position adjustment can be performed. After the adjustment is completed, the corresponding screws must be reset to lock the corresponding adjustment position. This process is not only cumbersome, but also time-consuming, and it is easy to cause errors during operation, thereby affecting the accuracy of the measurement results. Summary of the invention

[0005] The present application provides a device for measuring shoulder joint stability, which can improve the measurement efficiency of shoulder joint specimen stability.

[0006] To achieve the above objectives, the present application discloses the following technical solutions: A device for measuring shoulder joint stability comprises: an MTS material testing machine, a humeral shaft fixing mechanism and a scapula fixing mechanism, wherein the humeral shaft fixing mechanism is mounted on a fixing fixture of the MTS material testing machine, and the scapula fixing mechanism is mounted on a workbench of the MTS material testing machine, and the humeral shaft fixing mechanism and the scapula fixing mechanism are connected via an installed shoulder joint specimen; the humeral shaft fixing mechanism comprises a humeral fixing fixture and a first humeral adjustment component, and the first humeral adjustment component comprises a first mounting frame, a first worm, a first worm gear, a first connecting shaft, a rotating block, The first connecting rod and the first crank handle, the lead angle of the first worm is smaller than the friction angle of the first worm, the first worm wheel is rotatably mounted on the first mounting frame and meshes with the first worm; one end of the first connecting shaft is fixedly connected to the first worm wheel, and the other end is rotatably connected to the first mounting frame, and the central axis of the first connecting shaft coincides with the central axis of the first worm wheel; the rotating block is fixedly sleeved on the first connecting shaft; one end of the first connecting rod is arranged on the rotating block, and a humerus fixing clamp is arranged on the other end of the first connecting rod; the first crank handle is arranged on one end of the first worm.

[0007] In the embodiment of the present application, when the position of the humerus needs to be adjusted, the first crank handle can be rotated to drive the first worm to rotate. Since the first worm is meshed with the first worm wheel, the rotational movement of the first worm is transmitted to the first worm wheel, causing it to rotate around its own central axis. One end of the first connecting shaft is fixedly connected to the first worm wheel, so the rotating first worm wheel will drive the first connecting shaft to rotate synchronously, and then the rotating block fixedly sleeved on the first connecting shaft will rotate, and finally drive the first connecting rod to rotate, so as to adjust the pitch position of the humerus fixing fixture arranged at the other end of the first connecting rod.

[0008] In addition, since the lead angle of the first worm is smaller than the friction angle, self-locking can be achieved, so that the first humeral adjustment component can be automatically locked in the current position after adjustment, and there will be no accidental position changes. In this way, on the one hand, the operation process can be simplified, the operation time can be reduced, and the measurement efficiency of the stability of the shoulder joint specimen can be improved; on the other hand, the high stability of the humeral position after adjustment can be guaranteed, ensuring that the state of the shoulder joint specimen is accurate and reliable each time it is measured, thereby improving the accuracy of the measurement results.

[0009] In some possible implementations, the central axis of the first worm wheel is parallel to the first direction, the extension direction of the first worm is parallel to the second direction, the second direction is perpendicular to the first direction, the first humeral adjustment assembly further comprises a first seat bearing, and the first worm is rotatably connected to the top plate of the first mounting frame through the first seat bearing. In this way, the layout is more reasonable, and the structure of the first humeral adjustment assembly can be made more compact.

[0010] In some possible embodiments, the humeral shaft fixation mechanism also includes a second humeral adjustment component, which includes a second mounting frame, a second worm, a second connecting shaft, a second worm wheel and a second crank, and the second mounting frame is mounted on a fixing fixture of the MTS material testing machine; the second worm is rotatably connected to the second mounting frame through a second seat bearing, the central axis of the second worm is parallel to the second direction, and the lead angle of the second worm is smaller than the friction angle of the second worm; one end of the second connecting shaft is rotatably connected to the second mounting frame, and the central axis of the second connecting shaft is parallel to the third direction, the third direction is perpendicular to the second direction, and perpendicular to the first direction, and the other end of the second connecting shaft is fixedly connected to the first mounting frame; the second worm wheel is fixedly sleeved on the second connecting shaft and meshes with the second worm; the second crank is arranged on one end of the second worm.

[0011] In this way, the second worm can be rotated by rotating the second crank handle, driving the second worm wheel to rotate, and then the first mounting frame can be rotated by the second connecting shaft to achieve rotation adjustment of the humeral fixation fixture in the third direction. In this way, the humeral shaft fixation mechanism can be more flexibly adjusted in more directions, better adapt to different shoulder joint specimens and measurement requirements, and further improve the applicability and accuracy of the device in shoulder joint stability measurement.

[0012] In some possible implementations, the first crank handle is located on the first end of the first worm gear away from the first connecting rod, and the second crank handle is also located on the first end of the second worm gear away from the first connecting rod. In this way, the operator can switch between the two crank handles more smoothly, thereby making the adjustment process smoother and more efficient.

[0013] In some possible embodiments, a connecting sleeve is provided on the humeral fixing fixture, and the connecting sleeve is sleeved on the first connecting rod. The humeral fixing fixture also includes a first fixing bolt, and a first threaded hole is provided on the connecting sleeve, and the first threaded hole penetrates the circumferential wall of the connecting sleeve; the first fixing bolt cooperates with the first threaded hole, and can abut against the first connecting rod when the first fixing bolt is tightened. In this way, the position adjustment of the humerus in another dimension can be achieved by loosening the first fixing bolt and then driving the humeral fixing fixture to rotate around the central axis of the first connecting rod. When rotating to the desired position, the first fixing bolt can be tightened so that the first fixing bolt abuts against the first connecting rod, and the friction between the two is used to fix the adjustment position of the humeral fixing fixture. In this way, the humeral shaft fixing mechanism can be more flexibly adjusted in position in more directions, and better adapted to different shoulder joint specimens and measurement requirements.

[0014] In some possible embodiments, the scapula fixation mechanism includes a scapula fixation fixture, a rotating frame, a first scapula adjustment component, a second scapula adjustment component and a third scapula adjustment component, the scapula fixation fixture is used to fix the scapula; the scapula fixation fixture is arranged on one end of the rotating frame, and the rotating frame is used to drive the scapula fixation fixture to rotate around an axis parallel to the first direction and / or around an axis parallel to the second direction; the other end of the rotating frame is arranged on the first scapula adjustment component, and the first scapula adjustment component is used to drive the scapula fixation fixture to rotate around an axis parallel to the third direction; the first scapula adjustment component is arranged on the second scapula adjustment component, and the second scapula adjustment component is used to adjust the position of the scapula fixation fixture in the first direction; the second scapula adjustment component is arranged on the third scapula adjustment component, and the third scapula adjustment component is used to adjust the position of the scapula fixation fixture in the second direction.

[0015] In some possible embodiments, the third scapula adjustment component includes a base, a first lead screw, a first sliding nut, a first sliding plate, a first sliding support seat and a third crank, the base is mounted on the workbench of the MTS material testing machine; the extension direction of the first lead screw is parallel to the second direction, the first lead screw is rotatably mounted on the base through the third seat bearing, and the first lead screw thread lead angle is less than the friction angle of the first lead screw; the first sliding nut is mounted on the first lead screw and moves in the second direction with the rotation of the first lead screw; the first sliding plate is fixedly mounted on the first sliding nut, and the second scapula adjustment component is arranged on the first sliding plate; the first sliding plate is slidably arranged on the first sliding support seat, the first sliding support seat is fixedly arranged on the base, and the third crank is arranged on one end of the first lead screw. In this way, when it is necessary to adjust the position of the scapula in the second direction, the moving distance of the first sliding nut in the second direction can be controlled by controlling the rotation angle of the first lead screw. Since the first sliding plate is fixedly connected to the first sliding nut, the movement of the first sliding nut will drive the first sliding plate to move synchronously, thereby causing the second scapula adjustment component and subsequent related components arranged on the first sliding plate to be displaced in the second direction, thereby achieving the position adjustment of the scapula in the second direction. In addition, since the lead angle of the first lead screw is smaller than its friction angle, when there is no external force driving the first lead screw to rotate in the opposite direction, the first sliding nut will not move in the opposite direction by itself due to the external force, and thus the adjusted position can be automatically locked. In this way, on the one hand, the operation process can be further simplified, the operation time can be reduced, and the measurement efficiency of the stability of the shoulder joint specimen can be improved; on the other hand, the high stability of the humeral position after adjustment can be further guaranteed.

[0016] In some possible implementations, the second scapula adjustment assembly includes a second lead screw, a second sliding nut, a second sliding plate, a second sliding support seat, and a fourth crank, the extension direction of the second lead screw is parallel to the first direction, the second lead screw is rotatably mounted on the first sliding plate through a fourth seat bearing, and the second lead screw thread lead angle is smaller than the friction angle of the second lead screw; the second sliding nut is mounted on the second lead screw and moves in the first direction with the rotation of the second lead screw; the second sliding plate is fixedly mounted on the second sliding nut, and the first scapula adjustment assembly is arranged on the second sliding plate; the second sliding plate is slidably arranged on the second sliding support seat, the second sliding support seat is fixedly arranged on the first sliding plate, and the fourth crank is arranged on one end of the second lead screw. In this way, the position adjustment of the scapula fixing fixture in the first direction and the automatic locking after adjustment can be achieved.

[0017] In some possible embodiments, the first scapula adjustment assembly includes a third worm, a third worm wheel, a second connecting rod and a fifth rocker, wherein the third worm is rotatably arranged on the second sliding plate through a fifth seat bearing, and the lead angle of the third worm is smaller than the friction angle of the third worm; the third worm wheel is rotatably arranged on the second sliding plate, and the central axis of the third worm wheel is parallel to the third direction, and the third worm wheel is meshed with the third worm; one end of the second connecting rod is fixedly connected to the third worm wheel, and the other end of the second connecting rod is connected to the rotating frame, and the central axis of the second connecting rod coincides with the central axis of the third worm wheel; the fifth rocker is arranged on one end of the third worm. In this way, the third worm can be driven to rotate by rotating the fifth rocker, and the rotation of the third worm drives the third worm wheel to rotate around its central axis parallel to the third direction, thereby driving the second connecting rod to rotate, so that the rotating frame rotates around the axis parallel to the third direction, so as to achieve the angle adjustment of the scapula fixing fixture, and at the same time, because the lead angle of the third worm is smaller than the friction angle, it has a self-locking characteristic, and the adjustment position can be automatically locked after adjustment.

[0018] In some possible embodiments, the second connecting rod includes a first sub-rod and a second sub-rod, the first sub-rod is provided with a telescopic hole, and the central axis of the telescopic hole coincides with the central axis of the first sub-rod; the first scapula adjustment assembly also includes a second fixing bolt, the circumferential outer wall surface of the first sub-rod is provided with a second threaded hole, and the second threaded hole penetrates the circumferential wall surface of the first sub-rod; the second fixing bolt cooperates with the second threaded hole, and can abut against the second sub-rod when the second fixing bolt is tightened. In this way, the telescopic hole on the first sub-rod can be used to adjust the length of the second connecting rod to better adapt to different relative positions of the scapula and humerus. Specifically, the telescopic and fixed state of the second sub-rod relative to the first sub-rod can be controlled by loosening and tightening the second fixing bolt, so as to achieve adjustment of the scapula fixing fixture in the third direction, and the fixation is achieved by relying on the friction between the second fixing bolt and the second sub-rod, so as to ensure that the length of the adjusted second connecting rod is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions. It should be understood that in all the drawings, the same reference numerals represent the same elements. In the drawings, for the sake of clarity and ease of understanding, the sizes of some features may be deformed.

[0020] Figure 1 A schematic diagram of the structure of a device for measuring shoulder joint stability provided in some embodiments of the present application; Figure 2 for Figure 1 A schematic structural diagram of a humeral shaft fixing mechanism in a device for measuring shoulder joint stability is shown; Figure 3 for Figure 2 The structural schematic diagram of the humeral shaft fixing mechanism shown in another viewing angle; Figure 4 for Figure 1 An enlarged view of the circled portion of the device for measuring shoulder joint stability shown at A; Figure 5 for Figure 1 A schematic diagram of the structure of a scapula fixing mechanism in a device for measuring shoulder joint stability is shown; Figure 6 for Figure 5 An enlarged view of the portion of the shoulder blade fixation mechanism circled at B is shown; Figure 7 for Figure 5 An exploded view of the partial structure of the scapula fixation mechanism shown; Figure 8 for Figure 5 An enlarged view of the portion circled at C of the scapula fixation mechanism shown.

[0021] Description of reference numerals: 1. humeral shaft fixing mechanism; 11. humeral fixing fixture; 111. connecting sleeve; 1111. first threaded hole; 12. first humeral adjustment assembly; 121. first mounting frame; 122. first worm; 1221. first seat bearing; 123. first worm wheel; 124. first connecting shaft; 125. rotating block; 126. first connecting rod; 127. first crank; 13. second humeral adjustment assembly; 131. second mounting frame; 132. second worm; 1321. second seat bearing; 133. second connecting shaft; 134. second worm wheel; 135. second crank; 14. first fixing bolt; 2. scapula fixing mechanism; 21. scapula fixing fixture; 22. rotating frame; 23. first scapula bone adjustment assembly; 231, third worm; 2311, fifth bearing with seat; 232, third worm wheel; 233, second connecting rod; 2331, first sub-rod; 2332, second sub-rod; 234, fifth crank; 235, second fixing bolt; 24, second scapula adjustment assembly; 241, second lead screw; 2411, fourth bearing with seat; 242, second sliding nut; 243, second sliding plate; 244, second sliding support seat; 245, fourth crank; 25, third scapula adjustment assembly; 251, base; 252, first lead screw; 2521, third bearing with seat; 253, first sliding nut; 254, first sliding plate; 255, first sliding support seat; 256, third crank. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that, in the description of the present invention, terms such as "center", "upper", "lower", "horizontal", "inner", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0024] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1 Combined with Figure 2 and Figure 3 The embodiment of the present application provides a device for measuring shoulder joint stability, including: an MTS material testing machine (not shown in the figure), a humeral shaft fixing mechanism 1 and a scapula fixing mechanism 2, wherein the humeral shaft fixing mechanism 1 is mounted on a fixing fixture of the MTS material testing machine, and the scapula fixing mechanism 2 is mounted on a workbench of the MTS material testing machine, and the humeral shaft fixing mechanism 1 and the scapula fixing mechanism 2 are connected via an installed shoulder joint specimen (not shown in the figure); the humeral shaft fixing mechanism 1 includes a humeral fixing fixture 11 and a first humeral adjustment component 12. It can be understood that the humeral fixing fixture 11 can be designed with reference to the circular fixture in the prior art mentioned in the background technology, and its use method is the same as that of the circular fixture, which will not be described in detail here.

[0026] The first humeral adjustment component 12 includes a first mounting frame 121, a first worm 122, a first worm wheel 123, a first connecting shaft 124, a rotating block 125, a first connecting rod 126 and a first crank 127. The lead angle of the first worm 122 is less than the friction angle of the first worm 122. The first worm wheel 123 is rotatably mounted on the first mounting frame 121 and meshes with the first worm 122. One end of the first connecting shaft 124 is fixedly connected to the first worm wheel 123. For example, the first connecting shaft 124 and the first worm wheel 123 can be fixedly connected by screw connection, clamping, welding and the like. Specifically, the first connecting shaft 124 can be directly fixedly connected to the first worm wheel 123, or can be indirectly fixedly connected to the first worm wheel 123 by a structure such as a connecting plate. It can be understood that the fixed connection method between the subsequent components can be designed with reference to the connection method between the first connecting shaft 124 and the first worm wheel 123, and no further description is given.

[0027] The other end is rotatably connected to the first mounting frame 121, and the central axis of the first connecting shaft 124 coincides with the central axis of the first worm gear 123; the rotating block 125 is fixedly sleeved on the first connecting shaft 124; one end of the first connecting rod 126 is set on the rotating block 125, and the other end of the first connecting rod 126 is provided with a humerus fixing clamp 11; the first crank handle 127 is set on one end of the first worm gear 122.

[0028] In this way, when the humerus position needs to be adjusted, the first crank handle 127 can be rotated to drive the first worm 122 to rotate. Since the first worm 122 is meshed with the first worm wheel 123, the rotational movement of the first worm 122 is transmitted to the first worm wheel 123, causing it to rotate around its own central axis. Since one end of the first connecting shaft 124 is fixedly connected to the first worm wheel 123, the rotating first worm wheel 123 will drive the first connecting shaft 124 to rotate synchronously, thereby causing the rotating block 125 fixedly sleeved on the first connecting shaft 124 to rotate, and finally driving the first connecting rod 126 to rotate, thereby adjusting the pitch position of the humerus fixing fixture 11 set at the other end of the first connecting rod 126.

[0029] In addition, since the lead angle of the first worm 122 is smaller than the friction angle, self-locking can be achieved, so that the first humeral adjustment component 12 can be automatically locked in the current position after adjustment, and there will be no accidental position change. In this way, on the one hand, the operation process can be simplified, the operation time can be reduced, and the measurement efficiency of the stability of the shoulder joint specimen can be improved; on the other hand, the high stability of the humeral position after adjustment can be guaranteed, ensuring that the state of the shoulder joint specimen is accurate and reliable each time it is measured, thereby improving the accuracy of the measurement results.

[0030] See also Figure 2 In some embodiments, the central axis of the first worm wheel 123 is parallel to the first direction, the extension direction of the first worm 122 is parallel to the second direction, the second direction is perpendicular to the first direction, and the first humeral adjustment component 12 further includes a first seat bearing 1221, and the first worm 122 is rotatably connected to the top plate of the first mounting frame 121 through the first seat bearing 1221. In this way, the layout is more reasonable, and the structure of the first humeral adjustment component 12 can be made more compact.

[0031] See also Figure 2 Combine Figure 3In some embodiments, the humeral shaft fixing mechanism 1 further includes a second humeral adjustment component 13, the second humeral adjustment component 13 includes a second mounting frame 131, a second worm 132, a second connecting shaft 133, a second worm wheel 134 and a second crank 135, the second mounting frame 131 is mounted on a fixing fixture of the MTS material testing machine; the second worm 132 is rotatably connected to the second mounting frame 131 through a second seat bearing 1321, the central axis of the second worm 132 is parallel to the second direction, and the second worm 13 2 has a lead angle that is smaller than a friction angle of the second worm 132; one end of the second connecting shaft 133 is rotatably connected to the second mounting frame 131, and the central axis of the second connecting shaft 133 is parallel to the third direction, the third direction is perpendicular to the second direction, and is perpendicular to the first direction, and the other end of the second connecting shaft 133 is fixedly connected to the first mounting frame 121; the second worm wheel 134 is fixedly sleeved on the second connecting shaft 133 and meshed with the second worm 132; the second crank handle 135 is arranged on one end of the second worm 132.

[0032] In this way, the second worm 132 can be rotated by rotating the second crank 135, driving the second worm wheel 134 to rotate, and then the first mounting frame 121 can be rotated by the second connecting shaft 133 to achieve the rotation adjustment of the humeral fixation fixture 11 in the third direction. In this way, the humeral shaft fixation mechanism 1 can be more flexibly adjusted in more directions, better adapted to different shoulder joint specimens and measurement requirements, and further improve the applicability and accuracy of the device in the shoulder joint stability measurement.

[0033] See also Figure 3 In some embodiments, the first crank handle 127 is located on the first end of the first worm 122 away from the first connecting rod 126, and the second crank handle 135 is also located on the first end of the second worm 132 away from the first connecting rod 126. In this way, the operator can switch between the two crank handles more smoothly, thereby making the adjustment process smoother and more efficient.

[0034] See also Figure 4In some embodiments, a connecting sleeve 111 is provided on the humeral fixing fixture 11, and the connecting sleeve 111 is sleeved on the first connecting rod 126. The humeral fixing fixture 11 also includes a first fixing bolt 14, and a first threaded hole 1111 is provided on the connecting sleeve 111, and the first threaded hole 1111 passes through the circumferential wall of the connecting sleeve 111; the first fixing bolt 14 cooperates with the first threaded hole 1111, and can abut against the first connecting rod 126 when the first fixing bolt 14 is tightened. In this way, the position adjustment of the humerus in another dimension can be achieved by loosening the first fixing bolt 14 and then driving the humeral fixing fixture 11 to rotate around the central axis of the first connecting rod 126. When rotating to the desired position, the first fixing bolt 14 can be tightened to make the first fixing bolt 14 abut against the first connecting rod 126, and the friction between the two can be used to fix the adjusted position of the humeral fixing fixture 11. In this way, the humeral shaft fixing mechanism 1 can be more flexibly adjusted in more directions to better adapt to different shoulder joint specimens and measurement requirements.

[0035] See also Figure 5 In some embodiments, the scapula fixing mechanism 2 includes a scapula fixing fixture 21, a rotating frame 22, a first scapula adjustment component 23, a second scapula adjustment component 24 and a third scapula adjustment component 25, and the scapula fixing fixture 21 is used to fix the scapula; the scapula fixing fixture 21 is arranged on one end of the rotating frame 22, and the rotating frame 22 is used to drive the scapula fixing fixture 21 to rotate around an axis parallel to the first direction and / or around an axis parallel to the second direction; it can be understood that the rotating frame 22 can be designed with reference to the rotating frame 22 in the prior art mentioned in the background technology, and its usage method and working principle are the same as those, which will not be repeated here.

[0036] The other end of the rotating frame 22 is arranged on the first scapula adjustment component 23, and the first scapula adjustment component 23 is used to drive the scapula fixing clamp 21 to rotate around an axis parallel to the third direction; the first scapula adjustment component 23 is arranged on the second scapula adjustment component 24, and the second scapula adjustment component 24 is used to adjust the position of the scapula fixing clamp 21 in the first direction; the second scapula adjustment component 24 is arranged on the third scapula adjustment component 25, and the third scapula adjustment component 25 is used to adjust the position of the scapula fixing clamp 21 in the second direction.

[0037] See also Figure 6 Combined with Figure 7In some embodiments, the third shoulder blade adjustment component 25 includes a base 251, a first lead screw 252, a first sliding nut 253, a first sliding plate 254, a first sliding support seat 255 and a third crank 256, the base 251 is mounted on the workbench of the MTS material testing machine; the extension direction of the first lead screw 252 is parallel to the second direction, the first lead screw 252 is rotatably mounted on the base 251 through the third seat bearing 2521, and the thread lead angle of the first lead screw 252 is smaller than the friction angle of the first lead screw 252; the first sliding nut 253 is mounted on the first lead screw 252, and moves in the second direction with the rotation of the first lead screw 252; the first sliding plate 254 is fixedly mounted on the first sliding nut 253, and the second shoulder blade adjustment component 24 is arranged on the first sliding plate 254; the first sliding plate 254 is slidably arranged on the first sliding support seat 255, and the first sliding support seat 255 is fixedly arranged on the base 251. In this way, when the position of the scapula in the second direction needs to be adjusted, the moving distance of the first sliding nut 253 in the second direction can be controlled by controlling the rotation angle of the first lead screw 252. Since the first sliding plate 254 is fixedly connected to the first sliding nut 253, the movement of the first sliding nut 253 will drive the first sliding plate 254 to move synchronously, thereby causing the second scapula adjustment component 24 and subsequent related components disposed on the first sliding plate 254 to be displaced in the second direction, thereby achieving the position adjustment of the scapula in the second direction. In addition, since the thread lead angle of the first lead screw 252 is less than its friction angle, when there is no external force driving the first lead screw 252 to rotate in the reverse direction, the first sliding nut 253 will not move in the reverse direction by itself due to the external force, thereby automatically locking the adjusted position. In this way, on the one hand, the operation process can be further simplified, the operation time can be reduced, and the measurement efficiency of the stability of the shoulder joint specimen can be improved; on the other hand, the high stability of the adjusted humeral position can be further guaranteed.

[0038] See also Figure 6 Combined with Figure 7In some embodiments, the second shoulder blade adjustment component 24 includes a second lead screw 241, a second sliding nut 242, a second sliding plate 243, a second sliding support seat 244 and a fourth crank 245. The extension direction of the second lead screw 241 is parallel to the first direction. The second lead screw 241 is rotatably mounted on the first sliding plate 254 through a fourth seat bearing 2411, and the thread lead angle of the second lead screw 241 is smaller than the friction angle of the second lead screw 241; the second sliding nut 242 is mounted on the second lead screw 241 and moves in the first direction as the second lead screw 241 rotates; the second sliding plate 243 is fixedly mounted on the second sliding nut 242, and the first shoulder blade adjustment component 23 is arranged on the second sliding plate 243; the second sliding plate 243 is slidably arranged on the second sliding support seat 244, the second sliding support seat 244 is fixedly arranged on the first sliding plate 254, and the fourth crank 245 is arranged on one end of the second lead screw 241. In this way, the position adjustment of the scapula fixing fixture 21 in the first direction and the automatic locking after the adjustment can be achieved. The specific principle is the same as that of the third scapula adjustment component 25, which will not be repeated here.

[0039] See also Figure 6 In some embodiments, the first scapula adjustment component 23 includes a third worm 231, a third worm wheel 232, a second connecting rod 233 and a fifth rocker 234. The third worm 231 is rotatably disposed on the second sliding plate 243 through a fifth seat bearing 2311, and the lead angle of the third worm 231 is smaller than the friction angle of the third worm 231; the third worm wheel 232 is rotatably disposed on the second sliding plate 243, and the central axis of the third worm wheel 232 is parallel to the third direction, and the third worm wheel 232 is meshed with the third worm 231; one end of the second connecting rod 233 is fixedly connected to the third worm wheel 232, and the other end of the second connecting rod 233 is connected to the rotating frame 22, and the central axis of the second connecting rod 233 coincides with the central axis of the third worm wheel 232; the fifth rocker 234 is disposed on one end of the third worm 231. In this way, the third worm 231 can be driven to rotate by rotating the fifth crank handle 234. The rotation of the third worm 231 drives the third worm wheel 232 to rotate around its central axis parallel to the third direction, thereby driving the second connecting rod 233 to rotate, and the rotating frame 22 to rotate around the axis parallel to the third direction, thereby realizing the angle adjustment of the scapula fixing clamp 21. At the same time, because the lead angle of the third worm 231 is smaller than the friction angle, it has a self-locking property and can automatically lock the adjustment position after adjustment.

[0040] See also Figure 8In some embodiments, the second connecting rod 233 includes a first sub-rod 2331 and a second sub-rod 2332. The first sub-rod 2331 is provided with a telescopic hole, and the central axis of the telescopic hole coincides with the central axis of the first sub-rod 2331; the second sub-rod 2332 is inserted into the telescopic hole. The first scapula adjustment assembly 23 also includes a second fixing bolt 235. The circumferential outer wall surface of the first sub-rod 2331 is provided with a second threaded hole, and the second threaded hole penetrates the circumferential wall surface of the first sub-rod 2331; the second fixing bolt 235 cooperates with the second threaded hole, and when the second fixing bolt 235 is tightened, it can abut against the second sub-rod 2332. In this way, the telescopic hole on the first sub-rod 2331 can be used to achieve the length adjustment of the second connecting rod 233, so as to better adapt to different relative positions of the scapula and the humerus. Specifically, the second sub-rod 2332 can be controlled to extend and fix relative to the first sub-rod 2331 by loosening and tightening the second fixing bolt 235, so as to adjust the scapula fixing fixture 21 in the third direction (height direction), and the fixing is achieved by the friction between the second fixing bolt 235 and the second sub-rod 2332, so as to ensure that the length of the adjusted second connecting rod 233 is stable and reliable. It is understandable that the number of the second fixing bolt 235 and the second threaded hole can be multiple, and the multiple second fixing bolts 235 are arranged in a one-to-one correspondence with the multiple second threaded holes.

[0041] The present invention and its embodiments are described above, and such description is not restrictive. What is shown in the full text is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A device for measuring shoulder joint stability, comprising: MTS material testing machine, humeral shaft fixing mechanism and scapula fixing mechanism, the humeral shaft fixing mechanism is installed on the fixing fixture of the MTS material testing machine, the scapula fixing mechanism is installed on the workbench of the MTS material testing machine, the humeral shaft fixing mechanism and the scapula fixing mechanism are connected through the installed shoulder joint specimen; the humeral shaft fixing mechanism includes a humeral fixing fixture and a first humeral adjustment component, characterized in that the first humeral adjustment component includes: first mounting frame; a first worm, wherein the lead angle of the first worm is smaller than the friction angle of the first worm; a first worm wheel, the first worm wheel being rotatably mounted on the first mounting frame and meshingly cooperating with the first worm; a first connecting shaft, one end of which is fixedly connected to the first worm gear, and the other end of which is rotatably connected to the first mounting frame, wherein the central axis of the first connecting shaft coincides with the central axis of the first worm gear; A rotating block, wherein the rotating block is fixedly sleeved on the first connecting shaft; a first connecting rod, one end of which is arranged on the rotating block, and the other end of which is provided with the humerus fixing fixture; A first crank handle is disposed on one end of the first worm gear.

2. The device for measuring shoulder joint stability according to claim 1, characterized in that: The central axis of the first worm wheel is parallel to the first direction, the extension direction of the first worm is parallel to the second direction, the second direction is perpendicular to the first direction, and the first humeral adjustment assembly also includes a first seat bearing, and the first worm is rotatably connected to the top plate of the first mounting frame through the first seat bearing.

3. The device for measuring shoulder joint stability according to claim 2, characterized in that: The humeral shaft fixing mechanism further includes a second humeral adjustment component, wherein the second humeral adjustment component includes: A second mounting frame, wherein the second mounting frame is mounted on a fixing fixture of the MTS material testing machine; a second worm, the second worm being rotatably connected to the second mounting frame via a second seat bearing, the central axis of the second worm being parallel to the second direction, and the lead angle of the second worm being smaller than the friction angle of the second worm; a second connecting shaft, one end of which is rotatably connected to the second mounting bracket, and a central axis of the second connecting shaft is parallel to a third direction, the third direction is perpendicular to the second direction and perpendicular to the first direction, and the other end of the second connecting shaft is fixedly connected to the first mounting bracket; A second worm gear, the second worm gear is fixedly sleeved on the second connecting shaft and meshes with the second worm; A second rocker handle is disposed on one end of the second worm gear.

4. The device for measuring shoulder joint stability according to claim 3, characterized in that: The first crank is located on a first end of the first worm gear away from the first connecting rod, and the second crank is also located on a first end of the second worm gear away from the first connecting rod.

5. The device for measuring shoulder joint stability according to claim 2, characterized in that: The humerus fixing fixture is provided with a connecting sleeve, and the connecting sleeve is sleeved on the first connecting rod. The humerus fixing fixture also includes a first fixing bolt, and the connecting sleeve is provided with a first threaded hole, and the first threaded hole passes through the circumferential wall surface of the connecting sleeve; the first fixing bolt cooperates with the first threaded hole, and can abut against the first connecting rod when the first fixing bolt is tightened.

6. The device for measuring shoulder joint stability according to claim 3, characterized in that: The scapula fixing mechanism comprises: A scapula fixing fixture, wherein the scapula fixing fixture is used to fix the scapula; A rotating frame, the scapula fixing fixture is arranged on one end of the rotating frame, and the rotating frame is used to drive the scapula fixing fixture to rotate around an axis parallel to the first direction and / or around an axis parallel to the second direction; a first scapula adjustment component, on which the other end of the rotating frame is disposed, and the first scapula adjustment component is used to drive the scapula fixing fixture to rotate around an axis parallel to the third direction; a second scapula adjustment component, the first scapula adjustment component being arranged on the second scapula adjustment component, the second scapula adjustment component being used for adjusting the position of the scapula fixing fixture in a first direction; A third scapula adjustment component, on which the second scapula adjustment component is arranged, and the third scapula adjustment component is used to adjust the position of the scapula fixing fixture in the second direction.

7. The device for measuring shoulder joint stability according to claim 6, characterized in that: The third shoulder blade adjustment kit includes: A base, the base being mounted on a workbench of the MTS material testing machine; a first lead screw, wherein an extension direction of the first lead screw is parallel to the second direction, the first lead screw is rotatably mounted on the base via a third seat bearing, and a lead angle of the first lead screw is smaller than a friction angle of the first lead screw; a first sliding nut, which is mounted on the first lead screw and moves in the second direction as the first lead screw rotates; a first sliding plate, wherein the first sliding plate is fixedly mounted on the first sliding nut, and the second scapula adjustment assembly is disposed on the first sliding plate; A first sliding support seat, the first sliding plate is slidably disposed on the first sliding support seat, and the first sliding support seat is fixedly disposed on the base; A third rocker handle is disposed on one end of the first lead screw.

8. The device for measuring shoulder joint stability according to claim 7, characterized in that: The second shoulder blade adjustment assembly includes a second lead screw, wherein the extension direction of the second lead screw is parallel to the first direction, the second lead screw is rotatably mounted on the first sliding plate through a fourth seat bearing, and a lead angle of the second lead screw is smaller than a friction angle of the second lead screw; a second sliding nut, the second sliding nut being mounted on the second lead screw and moving in the first direction as the second lead screw rotates; a second sliding plate, the second sliding plate being fixedly mounted on the second sliding nut, and the first scapula adjustment assembly being arranged on the second sliding plate; A second sliding support seat, the second sliding plate is slidably disposed on the second sliding support seat, the second sliding support seat is fixedly disposed on the first sliding plate; A fourth rocker handle is disposed on one end of the second lead screw.

9. The device for measuring shoulder joint stability according to claim 8, characterized in that: The first shoulder blade adjustment component comprises: a third worm, the third worm being rotatably disposed on the second sliding plate via a fifth seat bearing, and the lead angle of the third worm being smaller than the friction angle of the third worm; a third worm gear, the third worm gear being rotatably disposed on the second sliding plate, the central axis of the third worm gear being parallel to the third direction, and the third worm gear being meshed with the third worm; a second connecting rod, one end of which is fixedly connected to the third worm gear, the other end of which is connected to the rotating frame, and a central axis of the second connecting rod coincides with a central axis of the third worm gear; A fifth rocker handle is disposed on one end of the third worm gear.

10. The device for measuring shoulder joint stability according to claim 9, characterized in that: The second connecting rod includes a first sub-rod and a second sub-rod, the first sub-rod is provided with a telescopic hole, and the central axis of the telescopic hole coincides with the central axis of the first sub-rod; the first scapula adjustment assembly also includes a second fixing bolt, the circumferential outer wall surface of the first sub-rod is provided with a second threaded hole, and the second threaded hole penetrates the circumferential wall surface of the first sub-rod; the second fixing bolt cooperates with the second threaded hole, and can abut against the second sub-rod when the second fixing bolt is tightened.

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