A knee joint biomechanics experimental platform and a load application structure

Abstract

The present invention discloses a knee joint biomechanics experimental platform and a load application structure, comprising: a sliding table, the sliding table includes a first plate, a second plate and a third plate, the second plate is slidably arranged on the first plate along a first direction, the third plate is slidably arranged on the second plate along a second direction, and the first direction is perpendicular to the second direction; further comprising: a first load application unit and a second load application unit, the first load application unit is fixed on the first plate and is drivingly connected to the second plate, and the second load application unit is fixed on the second plate and is drivingly connected to the third plate. The experimental platform is convenient to operate and can more accurately control the strength and direction of the load.

Description

Technical Field

[0001] The present invention relates to the technical field of shoulder joint biomechanics experiments, and particularly to a knee joint biomechanics experiment platform and a load application structure. Background Art

[0002] Chinese Invention Patent Publication No.: CN108766169B, Title: Knee Joint Force Loading and Biomechanical Characteristic Detection Experiment Platform, mainly includes a frame unit, a femoral attitude adjustment unit, a femoral reaction force and ligament strain measurement and force loading unit, a knee joint flexion drive unit, a tibial position passive unit, and a tibial internal and external rotation measurement unit; for specific content, reference can be made to Patent CN108766169B. However, manually setting the load is required for applying the load. For example, in actual operation, it may be achieved through gravity weights, the method is very complex, and the direction of the load force cannot be accurately controlled, resulting in an unsatisfactory experimental effect. Summary of the Invention

[0003] Aiming at the above problems existing in the prior art, the present invention aims to provide a knee joint biomechanics experiment platform and a load application structure that are convenient to operate and can more accurately control the magnitude and direction of the load.

[0004] The specific technical solution is as follows:

[0005] A load application structure for a knee joint biomechanics experiment platform mainly includes: a sliding table, the sliding table includes a first plate, a second plate, and a third plate, the second plate is slidably arranged on the first plate along a first direction, the third plate is slidably arranged on the second plate along a second direction, and the first direction is perpendicular to the second direction;

[0006] It further includes: a first load application unit and a second load application unit, the first load application unit is fixed on the first plate and is drivingly connected to the second plate, the second load application unit is fixed on the second plate and is drivingly connected to the third plate.

[0007] In the above load application structure of a knee joint biomechanics experiment platform, it further has the following characteristics. The first load application unit includes a first support, a first driving member, and a first tension sensor. The first support is arranged on the first plate, the first driving member is fixed on the first support and is drivingly connected to the first tension sensor, and the first tension sensor is fixedly connected to the second plate through a steel wire rope.

[0008] In the above load application structure of a knee joint biomechanics experiment platform, it further has the following characteristics. The first driving member is a first cylinder, and the first load application unit further includes a first pressure regulating valve that can be used to adjust the gas pressure in the first cylinder.

[0009] In the load application structure of the above-mentioned knee joint biomechanics experimental platform, there is also such a feature that it further includes a distance adjustment plate, the distance adjustment plate is adjustably fixed on the first plate, and the first support is fixed on the distance adjustment plate.

[0010] In the load application structure of the above-mentioned knee joint biomechanics experimental platform, there is also such a feature that the second load application unit includes a second support, a second driving member and a second tension sensor. The second support is arranged on the second plate, the second driving member is fixed on the second support and is drivingly connected to the second tension sensor, and the second tension sensor is fixedly connected to the third plate.

[0011] In the load application structure of the above-mentioned knee joint biomechanics experimental platform, there is also such a feature that the second driving member includes a second air cylinder and a second pressure regulating valve that can be used to adjust the gas pressure in the second air cylinder.

[0012] In the load application structure of the above-mentioned knee joint biomechanics experimental platform, there is also such a feature that the second pressure regulating valve is connected to the first pressure regulating valve.

[0013] A knee joint biomechanics experimental platform including the above-mentioned load application structure further includes a frame unit, a femoral attitude adjustment unit, a femoral reaction force and ligament strain measurement and force loading unit, a knee joint flexion driving unit, a tibial pose follower unit and a tibial internal and external rotation measurement unit;

[0014] The femoral attitude adjustment unit is installed on the frame unit, the femoral reaction force and ligament strain measurement and force loading unit is hinged to the femoral attitude adjustment unit, the tibial internal and external rotation measurement unit and the tibial pose follower unit are fixedly connected, the knee joint flexion driving unit includes a lifting assembly, the lifting assembly is fixed on the frame unit, a sliding table is arranged at the top of the lifting assembly, and the third plate of the sliding table is fixedly connected to the tibial pose follower unit.

[0015] The positive effects of the above technical solutions are:

[0016] A knee joint biomechanics experimental platform provided by the present invention, by adding a load application structure on the experimental platform, the load application structure includes a three-dimensional load application unit that can apply loads to the humerus in three mutually perpendicular directions and an axial load application unit that can apply loads in the axial direction of the humerus, can realize the application and control of three-dimensional loads, and can also realize the application and control of loads in the axial direction of the humerus. Compared with the prior art, it is convenient to operate and can more accurately control the intensity and direction of the load. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a knee joint biomechanics experimental platform provided by an embodiment of the present invention;

[0018] Figure 2 is Figure 1 a schematic structural diagram of the load application structure in

[0019] In the drawings: 1, frame unit; 2, femoral attitude adjustment unit; 3, femoral reaction force and ligament strain measurement and force loading unit; 4, knee joint flexion drive unit; 41, lifting assembly; 5, tibial position and posture follower unit; 6, tibial internal and external rotation measurement unit; 7, load application structure; 71, sliding table; 711, first plate; 712, second plate; 713, third plate; 72, first load application unit; 721, first support; 722, first drive member; 7221, first cylinder; 723, first tension sensor; 724, steel cable; 725, first pressure regulating valve; 726, distance adjusting plate; 727, three-position five-way solenoid valve; 73, second load application unit; 731, second support; 732, second drive member; 7321, second cylinder; 733, second tension sensor; 734, second pressure regulating valve; 10, knee joint. Detailed Embodiments

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" used in this application, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0022] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0023] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of a knee joint biomechanics experimental platform provided by an embodiment of the present invention; Figure 2 is Figure 1 a schematic structural diagram of the load application structure in

[0024] An embodiment of the present invention discloses a knee joint biomechanics experimental platform, including: a frame unit 1, a femoral attitude adjustment unit 2, a femoral reaction force and ligament strain measurement and force loading unit 3, a knee joint flexion driving unit 4, a tibial position passive unit 5, a tibial internal and external rotation measurement unit 6, and a load application structure 7.

[0025] The femoral attitude adjustment unit 2 is installed on the frame unit 1, the femoral reaction force and ligament strain measurement and force loading unit 3 is hinged to the femoral attitude adjustment unit 2, and the tibial internal and external rotation measurement unit 6 and the tibial position passive unit 5 are fixedly connected.

[0026] Specifically, the structures and connection relationships of the frame unit 1, the femoral attitude adjustment unit 2, the femoral reaction force and ligament strain measurement and force loading unit 3, the tibial position passive unit 5, and the tibial internal and external rotation measurement unit 6 can refer to Patent CN108766169B, which will not be elaborated here.

[0027] In this embodiment, the structure of the knee joint flexion driving unit 4 is the same as that in Patent CN108766169B. For the convenience of describing this patent, it is further explained here that the knee joint flexion driving unit 4 includes a lifting assembly 41, and the lifting assembly 41 is fixed on the frame unit 1.

[0028] The load application structure 7 includes a sliding table 71. The sliding table 71 is arranged at the top of the lifting assembly 41. The sliding table 71 includes a first plate 711, a second plate 712, and a third plate 713. The second plate 712 is slidably arranged on the first plate 711 along a first direction, and the third plate 713 is slidably arranged on the second plate 712 along a second direction, and the first direction and the second direction are perpendicular to each other;

[0029] The load application structure 7 further includes: a first load application unit 72 and a second load application unit 73. The first load application unit 72 is fixed on the first plate 711 and is drivingly connected to the second plate 712. The second load application unit 73 is fixed on the second plate 712 and is drivingly connected to the third plate 713.

[0030] Furthermore, the first load application unit 72 includes a first support 721, a first driving member 722, and a first tension sensor 723. The first support 721 is disposed on the first plate 711. The first driving member 722 is fixed on the first support 721 and is drivingly connected to the first tension sensor 723. The first tension sensor 723 is fixedly connected to the second plate 712 through a steel cable 724.

[0031] Furthermore, the first driving member 722 is a first air cylinder 7221. The first load application unit 72 further includes a first pressure regulating valve 725 that can be used to adjust the gas pressure in the first air cylinder 7221.

[0032] Specifically, the axis of the first air cylinder 7221 is arranged along the first direction and can drive the second plate 712 to move linearly along the first direction.

[0033] Furthermore, the first load application unit 72 further includes a distance adjusting plate 726. The distance adjusting plate 726 is adjustably fixed on the first plate 711, and the first support 721 is fixed on the distance adjusting plate 726. Such an arrangement can adjust the distance between the first air cylinder 7221 and the second plate 712, thereby meeting various different requirements.

[0034] The third plate 713 of the sliding table 71 is fixedly connected to the tibial pose follower unit 5. For example, in this embodiment, the third plate 713 is fixedly connected to the tibial pose follower unit 5 by screws.

[0035] Therefore, in the present invention, by setting the first load application unit 72, the end of the tibial pose follower unit 5 can be driven to move linearly along the first direction, thereby meeting the forward pulling force (in front of the human knee joint 10) required for the knee joint 10 experiment.

[0036] Specifically, the second load application unit 73 includes a second support 731, a second driving member 732, and a second tension sensor 733. The second support 731 is disposed on the second plate 712. The second driving member 732 is fixed on the second support 731 and is drivingly connected to the second tension sensor 733. The second tension sensor 733 is fixedly connected to the third plate 713.

[0037] Further, the second driving member 732 is a second air cylinder 7321, and the second load application unit 73 further includes a second pressure regulating valve 734 that can be used to adjust the gas pressure in the second air cylinder 7321. Optionally, in this embodiment, the second pressure regulating valve 734 is connected to the first pressure regulating valve 725.

[0038] Further, the air holes at both ends of the second air cylinder 7321 are connected to a three-position five-way solenoid valve 727 through air pipes, the three-position five-way solenoid valve 727 is connected to the first pressure regulating valve 725 through an air pipe, and the first pressure regulating valve 725 is connected to the air source through an air pipe. Optionally, in this embodiment, the first pressure regulating valve 725 and the second pressure regulating valve 734 can be electro-hydraulic proportional valves.

[0039] Therefore, in the present invention, by providing the second load application unit 73, the end of the tibial position following unit 5 can be driven to move linearly in the second direction, thereby realizing the force required for the varus / valgus moment required in the experiment of the knee joint 10.

[0040] A knee joint biomechanics experiment platform and a load application structure provided by the present invention, by adding a load application structure 7 on the experiment platform, the load application structure 7 includes a first load application unit 72 and a second load application unit 73 that can apply loads to the knee joint 10 in two mutually perpendicular directions. Compared with the prior art, it is convenient to operate and can more accurately control the magnitude and direction of the load.

[0041] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0042] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as a limitation to the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A load application structure of a knee joint biomechanics experimental platform, characterized in that, Comprising a sliding table, the sliding table includes a first plate, a second plate and a third plate. The second plate is slidably disposed on the first plate in a first direction, and the third plate is slidably disposed on the second plate in a second direction, where the first direction and the second direction are perpendicular to each other. Further included are: a first load application unit and a second load application unit. The first load application unit is fixed on the first plate and is drivingly connected to the second plate. The second load application unit is fixed on the second plate and is drivingly connected to the third plate. The first load application unit includes a first support, a first driving member and a first tension sensor. The first support is disposed on the first plate. The first driving member is fixed on the first support and is drivingly connected to the first tension sensor. The first tension sensor is fixedly connected to the second plate by a steel wire rope.

2. The load application structure of the knee joint biomechanics experimental platform according to claim 1, characterized in that The first driving member is a first cylinder, and the first load application unit further includes a first pressure regulating valve that can be used to adjust the gas pressure in the first cylinder.

3. The load application structure of the knee joint biomechanics experimental platform according to claim 2, wherein, Further included is a distance adjusting plate. The distance adjusting plate is adjustably fixed on the first plate, and the first support is fixed on the distance adjusting plate.

4. The load application structure of the knee joint biomechanics experimental platform according to claim 3, characterized in that, The second load application unit includes a second support, a second driving member and a second tension sensor. The second support is disposed on the second plate. The second driving member is fixed on the second support and is drivingly connected to the second tension sensor. The second tension sensor is fixedly connected to the third plate.

5. The load application structure of the knee joint biomechanics experiment platform according to claim 4, characterized in that, The second driving member includes a second cylinder and a second pressure regulating valve that can be used to adjust the gas pressure in the second cylinder.

6. The load application structure of the knee joint biomechanics experimental platform according to claim 5, characterized in that, The second pressure regulating valve is connected to the first pressure regulating valve.

7. A knee joint biomechanics experimental platform comprising the load application structure according to any one of claims 1 to 6, characterized in that, Further included are a frame unit, a femoral attitude adjustment unit, a femoral reaction force and ligament strain measurement and force loading unit, a knee joint flexion driving unit, a tibial position passive unit and a tibial internal and external rotation measurement unit. The femoral attitude adjustment unit is installed on the frame unit. The femoral reaction force and ligament strain measurement and force loading unit is hinged to the femoral attitude adjustment unit. The tibial internal and external rotation measurement unit and the tibial position passive unit are fixedly connected. The knee joint flexion driving unit includes a lifting assembly. The lifting assembly is fixed on the frame unit. The sliding table is disposed at the top of the lifting assembly. The third plate of the sliding table is fixedly connected to the tibial position passive unit.

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