Polar coordinate force arm rod and method of installing same

Abstract

The present application relates to the technical field of prosthetic experiment tool, propose a polar coordinate force arm rod and its installation method, including including installed on the force arm rod body of prosthetic or connecting rod, the force arm rod body is equipped with ruler, the scale origin of the ruler is on the center line of the prosthetic or connecting rod, the far end of the force arm rod far from the scale origin is slidably provided with an adjusting force assembly, and the origin of the force arm rod body is provided with an angle adjusting assembly.The beneficial effects of the present application are that: by setting the adjusting force assembly and the angle adjusting assembly, the position of the load point in the polar coordinate can be conveniently adjusted according to the transformation relationship, and the experimental efficiency is improved.

Description

Technical Field

[0001] This invention relates to the technical field of prosthetic experimental fixtures, specifically to a polar coordinate lever and its installation method. Background Technology

[0002] The standard for loading tests of lower limb prostheses, GB / T18375.1-7 "Structural Inspection of Lower Limb Prostheses," uses a rectangular coordinate system for the load application point. During the loading test, a rectangular coordinate mechanism or a special fixture is used to position the load application point. The inventors have found that current technologies using rectangular coordinate mechanisms are structurally complex, and using special fixtures lacks versatility. Summary of the Invention

[0003] This invention proposes a polar coordinate lever arm and its installation method. The polar coordinate lever arm converts the rectangular coordinate form of the load application point in the standard into the polar coordinate form, which is simple, universal, and allows for quick and easy installation of the load application point.

[0004] To this end, the first aspect of this application provides a polar coordinate lever arm, the technical solution of which is as follows: it includes a lever arm body installed on a prosthesis or a connecting rod, the lever arm body is provided with a ruler, the origin of the ruler is located on the center line of the prosthesis or the connecting rod, the distal end of the lever arm away from the origin of the ruler is slidably provided with an adjusting force application component, and the origin of the lever arm body is provided with an angle adjusting component.

[0005] By adopting the above technical solution, the position of the load point in polar coordinates can be conveniently adjusted according to the transformation relationship by setting the force adjustment component and the angle adjustment component.

[0006] Optionally, the lever arm body is provided with a connecting part, the connecting part is provided with a connecting hole, and the lever arm body is sleeved on the prosthesis or connecting rod through the connecting hole and fixed by a fastening component.

[0007] By adopting the above technical solution, the connection structure is simple, easy to fix, and the efficiency of the experiment is improved.

[0008] Optionally, the connecting part has a certain elasticity and an opening, and the fastening component is disposed at the opening.

[0009] By adopting the above technical solution, it is easier to install the lever arm body, and after installation, it can also achieve rapid positioning through fastening components, thereby improving installation and experimental efficiency.

[0010] Optionally, the fastening assembly includes a through hole at the opening of the connection portion, through which a fastening bolt passes.

[0011] By adopting the above technical solution: after the lever arm body is installed, the lever arm body is fixed by gradually tightening the fastening bolts.

[0012] Optionally, the force-adjusting assembly includes a support slidably disposed on the lever arm body and a fixing assembly for fixing the support, wherein the support is provided with a force-applying ball joint.

[0013] By adopting the above technical solution: the support is slidably set on the lever arm body, which makes it easy to adjust its position. After the position is adjusted, it can be easily and quickly fixed by the fixing component. At the same time, the force-applying hinge ball is set to facilitate the application of external force.

[0014] Optionally, the lever arm body is provided with a guide groove, the support is provided with a guide block, the guide block is located inside the guide groove, the fixing assembly includes a screw connected to the guide block, the portion of the screw extending out of the guide groove is provided with a pressure plate, a nut is threadedly connected to the screw, and a vernier scale is also provided on the support.

[0015] By adopting the above technical solution, it is convenient to adjust and fix the position of the support on the lever arm body.

[0016] Optionally, the angle adjustment assembly includes an angle disc fixedly fitted onto the prosthesis or connecting rod via a connector and an angle vernier scale mounted on the lever arm body.

[0017] By adopting the above technical solution, the angle of the lever arm body can be easily adjusted, and the position adjustment accuracy is higher.

[0018] Optionally, the lever arm body and the angle disk are rotatably connected via a time-division damping connector.

[0019] By adopting the above technical solution: when adjusting the angle of the lever arm body, the damping does not play a role. When the position is adjusted to the correct position, it has a certain damping effect to pre-position the lever arm body and prevent it from deviating. Then it is fixed by fastening components.

[0020] Optionally, the time-sharing damping connector includes a contact block disposed on the lower side of the lever arm body and a slide groove disposed on the angle disk, wherein the contact block is placed inside the slide groove and a time-sharing contact damping component is disposed inside the slide groove; The time-sharing contact damping component includes an elastic element that passes through the side wall of the slide groove, a damping block installed inside the elastic element, and a time-sharing connector connected to the outer end of the elastic element.

[0021] A second aspect of this application provides a method for installing a polar coordinate lever arm, comprising the following steps: S1. According to the prosthetic testing requirements, given the rectangular coordinates (x, y) of the load application point, convert them to polar coordinates (ρ, θ). The corresponding relationship is: ρ = (x, y) / (ρ, θ). 2 +y 2 ) 1 / 2 θ = arctg(y / x); S2. Adjust the support to length ρ and connect it to the lever arm body through the fixing component; S3. Secure the angle disc to the prosthesis or connecting rod, rotate the lever arm body to drive the angle vernier scale to rotate to angle θ, and secure the lever arm body to the prosthesis or connecting rod through the fastening assembly.

[0022] The working principle and beneficial effects of this application are as follows: 1. By setting the force application component and angle adjustment component, the position of the load point in polar coordinates can be easily adjusted according to the transformation relationship.

[0023] 2. It facilitates the installation of the lever arm body, and after installation, it can be quickly positioned by fastening components, thus improving installation and experimental efficiency.

[0024] 3. When the angle of the lever arm body is adjusted, the damping of the time-sharing damping connector does not work. After the position is adjusted, it has a certain damping effect to pre-position the lever arm body and prevent it from deviating. Then it is fixed by fastening components. Attached Figure Description

[0025] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a top view of the overall structure of an embodiment of this application; Figure 3 This is a schematic diagram of the lever arm body structure according to an embodiment of this application; Figure 4 This is a top view of the lever arm body according to an embodiment of this application; Figure 5 Examples of embodiments of this application Figure 1 Enlarged structural diagram at point A in the middle.

[0027] In the diagram: 100, connecting rod; 200, lever arm body; 210, connecting part; 220, connecting hole; 230, opening; 240, through hole; 250, fastening bolt; 260, guide groove; 270, vernier caliper; 280, angle vernier caliper; 300, ruler; 400, force adjustment assembly; 410, support; 411, guide block; 420, force application ball joint; 430, screw; 440, pressure plate; 450, nut; 500, angle adjustment assembly; 510, connector; 520, angle disc; 600, time-sharing damping connector; 610, contact block; 620, slide groove; 630, elastic element; 640, damping block; 650, handle; 660, blocking block; 670, telescopic rod; 680, spring. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1-5 As shown, this embodiment of the first aspect of this application provides a polar coordinate lever arm, and the technical solution adopted is as follows: it includes a lever arm body 200 installed on a prosthesis or connecting rod 100, a ruler 300 is provided on the lever arm body 200, the ruler 300 is provided with a scale, the origin of the ruler 300 is located on the center line of the prosthesis or connecting rod 100, which facilitates the determination of accurate distance data, an adjusting force application component 400 is slidably provided at the far end of the lever arm away from the scale origin, and an angle adjusting component 500 is provided at the origin of the lever arm body 200.

[0030] Its main principle and effect are as follows: by setting the force application component 400 and the angle adjustment component 500, the position of the load point in polar coordinates can be easily adjusted according to the transformation relationship.

[0031] In this embodiment, the lever arm body 200 is provided with a connecting part 210, and the connecting part 210 is provided with a connecting hole 220. The lever arm body 200 is sleeved on the prosthesis or connecting rod 100 through the connecting hole 220 and fixed by a fastening component.

[0032] The above connection method is simple and easy to fix. When installing the lever arm body 200, it is installed by means of a sleeve, which is convenient and improves the efficiency of the experiment.

[0033] Specifically, the connecting part 210 has a certain degree of elasticity and an opening 230. The fastening component is set at the opening 230. Because it has a certain degree of elasticity, it is convenient to install the lever arm body 200 during assembly. After installation, it can also achieve quick positioning through the fastening component, which improves the efficiency of installation and experimentation.

[0034] Specifically, the fastening assembly includes a through hole 240 formed at the opening 230 of the connecting part 210, through which a fastening bolt 250 is inserted. After the lever arm body 200 is installed, the lever arm body 200 is fixed by gradually tightening the fastening bolt 250.

[0035] Specifically, the force-applying component 400 includes a support 410 slidably mounted on the lever arm body 200 and a fixing component for fixing the support 410. The support 410 is provided with a force-applying ball joint 420. The support 410 is slidably mounted on the lever arm body 200, which facilitates the adjustment of its position. After the position is adjusted to the correct position, it can be easily and quickly fixed by the fixing component. At the same time, the force-applying ball joint facilitates the application of external force.

[0036] Specifically, the lever arm body 200 is provided with a guide groove 260, the support 410 is provided with a guide block 411, the guide block 411 is located inside the guide groove 260, the fixing assembly includes a screw 430 connected to the guide block 411, the part of the screw 430 extending out of the guide groove 260 is provided with a pressure plate 440, a nut 450 is threadedly connected to the screw 430, and a vernier scale 270 is also provided on the support 410.

[0037] By adopting the above technical solution, it is convenient to adjust and fix the position of the support 410 on the lever arm body 200.

[0038] Specifically, the angle adjustment assembly 500 includes an angle disc 520 fixedly sleeved on the prosthesis or connecting rod 100 via a connector 510, and an angle vernier scale 280 disposed on the lever arm body 200. This facilitates angle adjustment of the lever arm body 200, while also providing higher precision in position adjustment.

[0039] Reference Figure 5 Specifically, the lever arm body 200 and the angle disk 520 are rotatably connected by a time-sharing damping connector 600.

[0040] When adjusting the angle of the lever arm body 200, the damping has no effect. After the position is adjusted to the correct position, the damping has a certain damping effect to pre-position the lever arm body 200 and prevent it from shifting. Then it is fixed by fastening components.

[0041] Specifically, the time-sharing damping connector 600 includes a contact block 610 disposed on the lower side of the lever arm body 200 and a slide groove 620 disposed on the angle disk 520. The contact block 610 is placed inside the slide groove 620, and a time-sharing contact damping component is provided inside the slide groove 620. The time-sharing contact damping component includes an elastic element 630 that passes through the side wall of the slide groove 620, a damping block 640 installed inside the elastic element 630, and a time-sharing connector connected to the outer end of the elastic element 630.

[0042] The time-sharing connector is a ring-shaped plate that is embedded in a circular groove on the lower side of the lever arm body 200. A handle 650 can be provided on its periphery. A blocking block 660 is provided at the outer end of the elastic member 630. The ring-shaped plate and the blocking block 660 are in contact at different times. The elastic member 630 may include a telescopic rod 670 and a spring 680 sleeved on the telescopic rod 670.

[0043] When adjusting the position of the lever arm body 200, i.e., in the initial state, the annular plate is in contact with the blocking block 660, the spring 680 is in a compressed state, and the damping block 640 is separated from the contact block 610. Without damping, the lever arm body 200 can rotate to adjust the angle position. After the position is adjusted to the correct position, the annular plate is lifted and it is separated from the blocking block 660. Under the action of the spring 680, the damping block 640 abuts against the contact block 610 to achieve damping and pre-fix the position of the lever arm body 200.

[0044] A second aspect of this embodiment provides a method for installing a polar coordinate lever arm, comprising the following steps: S1. According to the prosthetic testing requirements, given the rectangular coordinates (x, y) of the load application point, convert them to polar coordinates (ρ, θ). The corresponding relationship is: ρ = (x, y) / (ρ, θ). 2 +y 2 ) 1 / 2 θ = arctg(y / x); S2. Adjust the support 410 to the length ρ and connect it to the lever arm body 200 through the fixing component; S3. Secure the angle disc 520 to the prosthesis or connecting rod 100, rotate the lever arm body 200 to drive the angle vernier scale 280 to rotate to angle θ, and secure the lever arm body 200 to the prosthesis or connecting rod 100 through the fastening assembly.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A polar coordinate lever arm, characterized in that, The device includes a lever arm body (200) mounted on a prosthesis or connecting rod (100), a ruler (300) on the lever arm body (200), the origin of the ruler (300) being located on the center line of the prosthesis or connecting rod (100), an adjusting force application component (400) being slidably provided at the distal end of the lever arm away from the origin of the scale, and an angle adjusting component (500) being provided at the origin of the lever arm body (200). The force adjustment assembly (400) includes a support (410) slidably disposed on the lever arm body (200) and a fixing assembly for fixing the support (410), wherein the support (410) is provided with a force-applying ball joint (420). The angle adjustment assembly (500) includes an angle disc (520) fixedly sleeved on the prosthesis or connecting rod (100) via a connector (510) and an angle vernier scale (280) set on the lever arm body (200). The lever arm body (200) and the angle disk (520) are rotatably connected by a time-sharing damping connector (600); The time-sharing damping connector (600) includes a contact block (610) disposed on the lower side of the lever arm body (200) and a slide groove (620) disposed on the angle disk (520). The contact block (610) is placed inside the slide groove (620), and the slide groove (620) is provided with a time-sharing contact damping component. The time-sharing contact damping component includes an elastic element (630) passing through the side wall of the slide groove (620), a damping block (640) installed inside the elastic element (630), and a time-sharing connector connected to the outer end of the elastic element (630). The time-sharing connector is an annular plate that is embedded in a circular groove on the lower side of the lever arm body (200). A handle (650) is provided on its periphery. A blocking block (660) is provided at the outer end of the elastic element (630). The annular plate is in contact with the blocking block (660) in a time-sharing manner. The elastic element (630) includes a telescopic rod (670) and a spring (680) sleeved on the telescopic rod (670).

2. The polar coordinate lever arm according to claim 1, characterized in that, The lever arm body (200) is provided with a connecting part (210), the connecting part (210) is provided with a connecting hole (220), the lever arm body (200) is sleeved on the prosthesis or connecting rod (100) through the connecting hole (220) and fixed by a fastening component.

3. A polar coordinate lever arm according to claim 2, characterized in that, The connecting part (210) has a certain elasticity and has an opening (230), and the fastening component is disposed at the opening (230).

4. A polar coordinate lever arm according to claim 3, characterized in that, The fastening assembly includes a through hole (240) at the opening (230) of the connection part (210), through which a fastening bolt (250) is inserted.

5. A polar coordinate lever arm according to claim 1, characterized in that, The lever arm body (200) is provided with a guide groove (260), the support (410) is provided with a guide block (411), the guide block (411) is located inside the guide groove (260), the fixing assembly includes a screw (430) connected to the guide block (411), the part of the screw (430) extending out of the guide groove (260) is provided with a pressure plate (440), the screw (430) is threaded with a nut (450), and the support (410) is also provided with a vernier scale (270).

6. A method for installing a polar coordinate lever arm as described in claim 1, characterized in that, Includes the following steps: S1. According to the prosthetic testing requirements, given the rectangular coordinates (x, y) of the load application point, convert them to polar coordinates (ρ, θ). The corresponding relationship is: ρ = (x, y) / (ρ, θ). 2 +y 2 ) 1 / 2 θ = arctg(y / x); S2. Adjust the support (410) to the length ρ and connect it to the lever arm body (200) through the fixing component; S3. Secure the angle disc (520) to the prosthesis or connecting rod (100), rotate the lever arm body (200) to drive the angle vernier scale (280) to rotate to angle θ, and secure the lever arm body (200) to the prosthesis or connecting rod (100) through the fastening assembly.

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