Deflector rod torsion measuring tool and deflector rod torsion measuring method
By designing the lever torque measurement tooling and torque conversion model, the problem of inaccurate endoscopic torque testing is solved, and accurate and reliable torque measurement and standard formulation are achieved.
Patent Information
- Application Number
- CN202510632537.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-07-29
AI Technical Summary
The existing endoscopic torque test devices are not accurate enough and lack acceptable torque standard ranges.
A lever torsion measuring tool set is designed, including fixing components, bearing components, screw components and push rod components. The lever torque of the endoscope is measured by a tension machine, and the torque conversion model is used to calculate the lever torque to eliminate the influence of internal friction and component gravity of the tool set.
Provides accurate and reliable lever torque data to help develop a standard range of acceptable torque for the endoscope, simplifying the measurement process and improving the accuracy of measurement results.
Smart Images
Figure CN120385449A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical devices, and particularly to a dial rod torque measurement tooling and a dial rod torque measurement method. Background Art
[0002] Currently, most medical endoscopes drive the snake bone to bend left and right by rotating the manual dial rod of the operation part up and down to drive the traction wire, so as to control the direction and angle of the head end of the insertion part in the endoscope, so that the head end lens can obtain a larger viewing angle range and image.
[0003] However, currently, the torque of the manual dial rod is usually sensed by hand, that is, the torque of the manual dial rod is not quantified, and there is no acceptable torque standard range. Although there are some devices for testing the torque of the endoscope, basically a torque meter is used for measurement, not only the device structure is relatively complex, but also the friction force of each level in the device cannot be estimated, resulting in inaccurate measurement results. Summary of the Invention
[0004] In order to solve the problem that the existing endoscope torque test device has inaccurate measurement results; the present application provides a dial rod torque measurement tooling and a dial rod torque measurement method, which can provide accurate and reliable data for the dial rod torque of the whole endoscope, so as to formulate an acceptable dial rod torque standard range for the endoscope.
[0005] According to one aspect of the present application, an embodiment of the present application provides a dial rod torque measurement tooling for measuring the dial rod torque of an endoscope through a tensile testing machine, including:
[0006] A fixing component, having a positioning cavity for fixedly installing the endoscope and an opening communicating with the positioning cavity and for the dial rod of the endoscope to move;
[0007] A bearing component, including a bearing outer ring fixedly arranged on the fixing component and a bearing inner ring rotatably arranged on the bearing outer ring;
[0008] A lead screw component, including a lead screw bushing fixedly connected to the bearing inner ring, a lead screw nut fixedly connected to the lead screw bushing, and a lead screw rod threadedly connected to the lead screw nut and used for connecting with the tensile arm of the tensile testing machine; and
[0009] A push rod component, including a rotating arm fixedly connected to the lead screw nut and a push arm fixedly connected to the rotating arm and extending into the opening for pushing the dial rod.
[0010] According to some embodiments of the present application, the bearing component and the lead screw component are coaxially arranged and are used to correspond to the rotation center of the dial rod of the endoscope.
[0011] According to some embodiments of the present application, the fixing assembly includes a bottom plate for being fixed by a clamping tool of the tensile machine, a cover plate provided with the opening, and a bracket mounted on the cover plate to fix the outer ring of the bearing; the cover plate is detachably covered on the bottom plate to form the positioning cavity for fixing the endoscope.
[0012] According to some embodiments of the present application, the fixing assembly further includes at least two positioning posts protruding from the cover plate; the bracket is sleeved on the positioning posts to position and fix the bracket on the cover plate.
[0013] According to some embodiments of the present application, the bearing assembly further includes a bearing upper pressing piece located above the outer ring of the bearing and a bearing lower pressing piece located below the inner ring of the bearing; the bearing upper pressing piece is fixedly connected to the bracket to relatively fix the outer ring of the bearing to the bracket; the bearing lower pressing piece is fixedly connected to the screw rod sleeve to relatively fix the inner ring of the bearing to the screw rod sleeve.
[0014] According to some embodiments of the present application, the bearing assembly further includes bearing balls rollably arranged between the outer ring of the bearing and the inner ring of the bearing to form a two-way thrust ball bearing.
[0015] According to some embodiments of the present application, the screw rod assembly is a ball screw.
[0016] According to some embodiments of the present application, one end of the rotating arm is sleeved on the screw nut and fixedly connected to the screw rod sleeve; the other end of the rotating arm is fixedly connected to the pushing arm.
[0017] According to some embodiments of the present application, the rotating arm extends radially outward along the screw rod, and the pushing arm extends axially downward along the screw rod.
[0018] According to some embodiments of the present application, an arc-shaped groove for installing the pushing arm is provided at the other end of the rotating arm.
[0019] According to another aspect of the present application, an embodiment of the present application further provides a method for measuring the torque of a lever, including the steps of:
[0020] Before loading the endoscope into the positioning cavity of any one of the above lever torque measurement tools, perform an empty pull measurement on the lever torque measurement tool by a tensile machine to obtain an initial calibration value;
[0021] After loading the endoscope into the positioning cavity of the lever torque measurement tool, perform an actual pull measurement on the lever torque measurement tool by the tensile machine to obtain a tensile measurement value; and
[0022] Based on the initial calibration value and the tensile force measurement value, the torque of the lever of the endoscope is calculated through a torque conversion model.
[0023] According to some embodiments of the present application, the torque conversion model is:
[0024] F’ = (F - F0) × P / (2Pi × R’);
[0025] Where: F’ is the torque of the lever of the endoscope; F is the tensile force measurement value; F0 is the initial calibration value; P is the lead of the screw rod in the lever torque measurement tooling; Pi is the pi; R’ is the lever force arm of the endoscope.
[0026] According to some embodiments of the present application, the step of, after loading the endoscope into the positioning cavity in the lever torque measurement tooling, performing a real pull measurement on the lever torque measurement tooling by the tensile testing machine to obtain the tensile force measurement value includes the steps of:
[0027] Driving the tensile force arm of the tensile testing machine to move up and down to drive the screw rod in the lever torque measurement tooling to move up and down, so that the up and down movement of the screw rod is converted into the rotational movement of the screw nut in the lever torque measurement tooling;
[0028] Driving, through the screw nut, the push rod assembly in the lever torque measurement tooling to rotate on a plane, so as to drive the lever of the endoscope to rotate synchronously through the push arm in the push rod assembly; and
[0029] Displaying and / or saving in real time, through a computer, the data measured by the tensile testing machine.
[0030] In summary, when the tensile force arm of the tensile testing machine pulls the screw rod to move up and down, the screw nut will rotate clockwise or counterclockwise on a plane under the action of the screw rod, so as to drive the push arm to rotate clockwise or counterclockwise on a plane through the rotating arm, thereby driving the lever of the endoscope to rotate clockwise or counterclockwise on a plane. During this process, the lever torque measurement tooling of the present application converts the lever torque of the endoscope into the tensile force of the tensile testing machine, so as to correspondingly obtain the torque curve of the lever according to the tensile force curve measured by the tensile testing machine, which is beneficial to the analysis of the measurement data and the technical improvement of the endoscope product.
[0031] In addition, to exclude the influence of factors such as the friction inside the tooling and the gravity of components, when measuring the torque of the lever of the endoscope through the lever torque measurement tooling of the present application, an empty pull measurement can be first performed without loading the endoscope, so that the tensile testing machine obtains an initial calibration value F0, and then a real pull measurement is performed with the endoscope loaded, so that the tensile testing machine obtains a tensile force measurement value F. Then, the actual tensile force value ΔF applied by the tensile testing machine to the lever of the endoscope is equal to the difference between the tensile force measurement value F and the initial calibration value F0, so as to obtain the real-time torque curve of the lever according to the actual tensile force curve, effectively excluding the influence of factors such as the friction inside the tooling and the gravity of components, obtaining accurate and reliable lever torque measurement results, and being conducive to formulating an acceptable lever torque standard range for the endoscope. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.
[0033] Figure 1 Schematic diagram of the state of the lever torque measurement tooling for real pull measurement provided by an embodiment of the present application;
[0034] Figure 2 Shows Figure 1 Exploded schematic diagram of the lever torque measurement tooling shown;
[0035] Figure 3 Shows Figure 1 Stereoscopic sectional view schematic diagram of the lever torque measurement tooling shown;
[0036] Figure 4 Schematic diagram of the state of the lever torque measurement tooling for empty pull measurement according to the above embodiment of the present application;
[0037] Figure 5 Shows Figure 4 Sectional view schematic diagram of the lever torque measurement tooling shown;
[0038] Figure 6 Shows Figure 5 Enlarged schematic diagram of the partial A in the lever torque measurement tooling shown;
[0039] Figure 7 Flow schematic diagram of the lever torque measurement method according to an embodiment of the present application;
[0040] Figure 8Shows an example of the actual pull measurement step in the lever torque measurement method according to the above embodiments of the present application.
[0041] Reference numerals:
[0042] 1. Lever torque measurement tooling; 10. Fixed component; 101. Positioning cavity; 102. Opening; 11. Base plate; 12. Cover plate; 13. Bracket; 14. Positioning post; 20. Bearing component; 21. Bearing outer ring; 22. Bearing inner ring; 23. Bearing ball; 24. Upper bearing pressing piece; 25. Lower bearing pressing piece; 30. Lead screw component; 31. Lead screw bushing; 32. Lead screw nut; 33. Lead screw; 40. Push rod component; 41. Rotating arm; 410. Arc groove; 42. Pushing arm; 2. Endoscope; 3. Lever. Detailed implementation manners
[0043] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0044] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present application are only for the purpose of illustration and do not represent the only implementation manner.
[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one feature. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0046] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" or "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or it merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" or "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or it merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0047] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.
[0048] Considering that some of the existing devices for measuring the torsion of endoscopes on the market basically use torsion meters for measurement, not only is the device structure relatively complex, but also the magnitudes of the frictional forces at all levels in the device cannot be estimated, resulting in inaccurate measurement results. To solve this problem, this application provides a dial rod torsion measurement tooling and a dial rod torsion measurement method, which can provide accurate and reliable data for the dial rod torsion of the entire endoscope, so as to formulate an acceptable standard range for the dial rod torsion of the endoscope.
[0049] Specifically, please refer to Figures 1 to 6 An embodiment of this application provides a dial rod torsion measurement tooling 1, which can convert torsion into tension, so as to measure the dial rod torsion of the endoscope 2 through a tensile testing machine (not shown in the figure), without using a torsion meter / torsion wrench for measurement, preventing inaccurate measurement results caused by the inability of the torsion meter to estimate the frictional forces at all levels. It can be understood that the tensile testing machine mentioned in this application can be but is not limited to being implemented as a vertical tensile testing machine, which can drive the tensile arm to move up and down under the drive of a computer to obtain the tensile curve of the tensile arm.
[0050] More specifically, as shown in Figures 1 to 6As shown in the figure, the lever torque measuring tooling 1 may include a fixing component 10, a bearing component 20, a lead screw component 30, and a push rod component 40. The fixing component 10 has a positioning cavity 101 for fixedly installing the endoscope 2 and an opening 102 communicating with the positioning cavity 101 and for the lever 3 of the endoscope 2 to move. The bearing component 20 includes an outer bearing ring 21 fixedly arranged on the fixing component 10 and an inner bearing ring 22 rotatably arranged on the outer bearing ring 21. The lead screw component 30 includes a lead screw sleeve 31 fixedly connected to the inner bearing ring 22, a lead screw nut 32 fixedly connected to the lead screw sleeve 31, and a lead screw 33 threadedly connected to the lead screw nut 32 and used for connecting with the tension arm of the tensile testing machine. The push rod component 40 includes a rotating arm 41 fixedly connected to the lead screw nut 32 and a push arm 42 fixedly connected to the rotating arm 41 and extending into the opening 102 for pushing the lever. It can be understood that the fixed connection mentioned in this application can be directly connected through fasteners such as screws, or indirectly connected through an intermediate medium, as long as the two are relatively fixed. This application will not elaborate further on this. In addition, the tension arm mentioned in this application can be connected to the lead screw 33 by, but not limited to, clamping, as long as it can push and pull the lead screw 33 to move only up and down. This application will not elaborate further on this.
[0051] Thus, as Figure 3 shown in the figure, when the tension arm of the tensile testing machine pulls the lead screw 33 to move up and down, the lead screw nut 32 will rotate clockwise or counterclockwise on a plane under the action of the lead screw 33, so as to drive the push arm 42 to rotate clockwise or counterclockwise on a plane through the rotating arm 41, thereby pushing the lever 3 of the endoscope 2 to rotate clockwise or counterclockwise on a plane. During this process, the lever torque measuring tooling 1 of this application converts the lever torque of the endoscope 2 into the tension of the tensile testing machine, so as to correspondingly obtain the torque curve of the lever 3 according to the tension curve measured by the tensile testing machine, which is beneficial to the analysis of measurement data and the technical improvement of endoscope products.
[0052] It should be noted that in order to exclude the influence of factors such as the friction force inside the tooling and the gravity of components, when measuring the torque of the lever of the endoscope 2 through the lever torque measuring tooling 1 in this application, the empty pull measurement can be carried out first without installing the endoscope 2, so that the tensile testing machine obtains an initial calibration value F0, and then the actual pull measurement is carried out when the endoscope 2 is installed, so that the tensile testing machine obtains a tensile force measurement value F. Then the actual tensile force value ΔF applied by the tensile testing machine to the lever 3 of the endoscope 2 is equal to the difference between the tensile force measurement value F and the initial calibration value F0, that is, ΔF = F - F0, so as to obtain the real-time torque curve of the lever 3 according to the actual tensile force curve, effectively excluding the influence of factors such as the friction force inside the tooling and the gravity of components, obtaining accurate and reliable lever torque measurement results, and being beneficial to formulating an acceptable lever torque standard range for the endoscope.
[0053] Exemplarily, as Figure 3 and Figure 6 shown, the bearing assembly 20 and the lead screw assembly 30 are coaxially arranged and are used to correspond to the rotation center of the lever of the endoscope 2 fixedly installed within the positioning cavity 101, so that the rotation centers of the inner bearing ring 22, the lead screw nut 32, and the push rod assembly 40 are substantially coincident (designed to be completely coincident, and the manufacturing and assembly clearance can be ignored) with the rotation center of the lever of the endoscope 2, so as to simplify the conversion relationship between the torque of the lever 3 and the tensile force of the tensile testing machine.
[0054] For example, as Figure 3 shown, let f1 be the friction force between the lead screw 33 and the lead screw nut 32, and the distance from its force application point to the rotation center be R1; let f2 be the friction force between the inner bearing ring 22 and the outer bearing ring 21, and the distance from its force application point to the rotation center be R2; let F’ be the torque of the lever of the endoscope 2, and the distance from its force application point to the rotation center be R’; let F be the tensile force for the tensile force arm of the tensile testing machine to pull the lead screw 33; let G be the gravity of the lead screw 33; let P be the lead of the lead screw 33, that is, when the lead screw 33 displaces one lead, the lead screw nut 32 rotates one circle; let PI represent the pi.
[0055] As Figures 1 to 3 shown, when the endoscope 2 is installed for actual pull measurement, according to the principle of energy conservation, the following formula (1) can be obtained:
[0056] F×P-G(×P=f1×2Pi×R1+f2×2Pi×R2+F’×2Pi×R’ (1)
[0057] As Figures 4 to 6 shown, when the endoscope 2 is not installed for empty pull measurement, F’ = 0; at this time, according to the principle of energy conservation, the following formula (2) can be obtained:
[0058] F0×P-G×P = f1×2Pi×R1+f2×2Pi×R2 (2)
[0059] Then, by taking the difference between the above formula (1) and the above formula (2), the following formula (3) can be obtained:
[0060] (F-F0)×P = F’×2Pi×R’ (3)
[0061] Furthermore, from the above formula (3), the following formula (4) can be easily obtained:
[0062] F’ = (F-F0)×P / (2Pi×R’) = ΔF×P / (2Pi×R’) (4)
[0063] In the formula: F’ is the torque of the lever of the endoscope 2; ΔF is the actual tensile force value; P is the lead of the lead screw 33; Pi is the pi; R’ is the lever arm of the lever of the endoscope 2 (i.e., the distance from the force application point of the lever to the rotation center).
[0064] In summary, since the lead P of the lead screw 33 is a designed fixed value; the pi Pi is a known constant; the distance R’ from the force application point of the lever to the rotation center is a fixed value of the endoscope 2 and can be directly measured and obtained; therefore, the torque F’ of the lever of the endoscope 2 is in a proportional relationship with the actual tensile force value ΔF of the tensile testing machine. And the actual tensile force value ΔF of the tensile testing machine is equal to the difference between the tensile force measurement value F and the initial calibration value F0, which can be obtained by the tensile testing machine. Then, the torque curve of the lever of the endoscope 2 can be accurately calculated through the above formula (4) to obtain the real-time torque of the lever 3.
[0065] It should be noted that since the lead P of the lead screw 33 is often much smaller than 2Pi×R’, the actual tensile force value ΔF of the tensile testing machine will be much larger than the torque of the lever of the endoscope 2. Therefore, the lever torque measurement tooling 1 of the present application can greatly amplify the measurement value to accurately measure the smaller lever torque.
[0066] Optionally, as Figure 2 and Figure 5 shown, the cavity shape of the positioning cavity 101 matches the shape of the operating part of the endoscope 2 to position and place the endoscope 2 in the cavity, so that the lever 3 of the endoscope 2 is aligned with the opening 102 to be pushed by the push arm 42 extending into the opening 102.
[0067] Optionally, as Figures 2 to 5As shown, the fixing assembly 10 includes a bottom plate 11 for being fixed by the clamping tool of the tensile testing machine, a cover plate 12 provided with the opening 102, and a bracket 13 mounted on the cover plate 12 to fix the outer ring 21 of the bearing; the cover plate 12 is detachably covered on the bottom plate 11 to form the positioning cavity 101 for positioning and fixing the endoscope 2. In this way, when the cover plate 12 is detached from the bottom plate 11, the positioning cavity 101 is opened to facilitate the picking and placing of different endoscopes 2; when the cover plate 12 is mounted on the bottom plate 11, the operating part of the endoscope 2 will be clamped and fixed between the bottom plate 11 and the cover plate 12 to be positioned and fixed in the positioning cavity 101, ensuring that the lever 3 of the endoscope 2 is aligned with the opening 102 to be easily pushed by the pushing arm 42. It can be understood that the cover plate 12 mentioned in the present application can be detachably fixed to the bottom plate 11 by, but not limited to, five M8 hexagon socket head cap screws.
[0068] Optionally, as Figures 2 to 4 shown, the fixing assembly 10 further includes at least two positioning posts 14 protruding from the cover plate 12; the bracket 13 is sleeved on the positioning posts 14 so as to position and fix the bracket 13 to the cover plate 12 by screws, thereby ensuring that the rotation center of the inner ring 22 of the bearing coincides with the rotation center of the lever 3. It can be understood that the bracket 13 mentioned in the present application can be fixed to the cover plate 12 by, but not limited to, two M8 hexagon socket head cap screws.
[0069] Optionally, as Figure 3 and Figure 6 shown, the bearing assembly 20 further includes bearing balls 23 rollably arranged between the outer ring 21 of the bearing and the inner ring 22 of the bearing to form a standard double-direction thrust ball bearing, facilitating reducing the frictional force f(axis) when the inner ring 22 of the bearing rotates relative to the outer ring 21 of the bearing, and acting as a carrier for axial pushing and pulling forces, so that the tooling will not fail under huge pushing and pulling forces, improving the reliability of the overall structure.
[0070] Optionally, as Figure 3 and Figure 6 shown, the bearing assembly 20 further includes a bearing upper pressing piece 24 located above the outer ring 21 of the bearing and a bearing lower pressing piece 25 located below the inner ring 22 of the bearing; the bearing upper pressing piece 24 is fixedly connected to the bracket 13 to relatively fix the outer ring 21 of the bearing to the bracket 13; the bearing lower pressing piece 25 is fixedly connected to the lead screw bushing 31 to relatively fix the inner ring 22 of the bearing to the lead screw bushing 31. It can be understood that the bearing upper pressing piece 24 mentioned in the present application can be fixed to the bracket 13 by, but not limited to, three M3 hexagon socket head cap screws; the bearing lower pressing piece 25 mentioned in the present application can be fixed to the lead screw bushing 31 by, but not limited to, two M3 hexagon socket head cap screws.
[0071] According to the above embodiments of the present application, the lead screw assembly 30 is implemented as a ball screw, so as to use a ball screw with high maturity and accuracy as the key conversion component of the lever torque measurement tooling 1, which is beneficial to improving the accuracy and reliability of the measurement results while simplifying the tooling structure.
[0072] Optionally, as Figure 2 , Figure 3 and Figure 4 shown, one end of the rotating arm 41 is sleeved on the lead screw nut 32 and fixedly connected to the lead screw sleeve 31, and the other end of the rotating arm 41 is fixedly connected to the pushing arm 42, so that the rotating arm 41 drives the pushing arm 42 to rotate in a plane under the drive of the lead screw nut 32, thereby pushing the lever 3 of the endoscope 2. It can be understood that the rotating arm 41 mentioned in the present application can be fixed to the lead screw sleeve 31 by, but not limited to, four M3 hexagon socket head cap screws; the pushing arm 42 mentioned in the present application can be fixed to the rotating arm 41 by, but not limited to, one M3 hexagon socket head cap screw.
[0073] Optionally, as Figure 3 and Figure 5 shown, the rotating arm 41 extends radially outward along the lead screw 33, and the pushing arm 42 extends axially downward along the lead screw 33, so that the pushing arm 42 rotates in a plane perpendicular to the axial direction of the lead screw 33, so as to push the lever 3 to rotate clockwise or counterclockwise only in one plane.
[0074] Optionally, as Figure 3 and Figure 4 shown, an arc-shaped groove 410 for installing the pushing arm 42 is formed at the other end of the rotating arm 41, so as to adjust the installation position of the pushing arm 42 on the rotating arm 41 along the arc-shaped groove 410, thereby adjusting the distance between the pushing arm 42 and the lead screw sleeve 31 according to the position of the lever of the endoscope 2, so as to ensure that the pushing arm 42 can accurately push the lever 3. It can be understood that the pushing arm 42 of the present application is fixed to the rotating arm 41 by one M3 hexagon socket head cap screw passing through the arc-shaped groove 410, so as to adjust the installation position of the pushing arm 42 as needed.
[0075] In addition, the opening 102 of the fixing assembly 10 is implemented as a fan-shaped opening, so as to match the rotation requirement of the lever 3 while minimizing the opening area on the cover plate 12 and reserving enough positioning and fixing space for the bracket 13.
[0076] It should be noted that the overall structure of the lever torque measurement tooling 1 of the present application is simple and the cost is low; it can measure endoscopes of different models only by replacing the bottom plate 11 and / or the cover plate 12, has good versatility, and can measure the lever torque accurately, reliably and in real time.
[0077] It is worth mentioning that, according to another aspect of the present application, as Figure 7 shown, an embodiment of the present application further provides a method for measuring the torque of a lever, which may include the steps of:
[0078] S100: Before loading the endoscope into the positioning cavity of the lever torque measurement tooling, perform an empty pull measurement on the lever torque measurement tooling through a tensile testing machine to obtain an initial calibration value;
[0079] S200: After loading the endoscope into the positioning cavity of the lever torque measurement tooling, perform an actual pull measurement on the lever torque measurement tooling through the tensile testing machine to obtain a tensile measurement value; and
[0080] S300: Based on the initial calibration value and the tensile measurement value, calculate the lever torque of the endoscope through a torsion-pull conversion model.
[0081] It should be noted that the torsion-pull conversion model mentioned in the present application can be implemented as:
[0082] F’ = (F - F0) × P / (2Pi × R’);
[0083] Where: F’ is the lever torque of the endoscope; F is the tensile measurement value; F0 is the initial calibration value; P is the lead of the screw rod in the lever torque measurement tooling; Pi is the pi; R’ is the lever force arm of the endoscope.
[0084] It should be noted that, in an example of the present application, as Figure 8 shown, step S200 in the method for measuring the lever torque of the present application includes the steps of:
[0085] S210: Drive the tensile arm of the tensile testing machine to move up and down to drive the screw rod in the lever torque measurement tooling to move up and down, so that the up and down movement of the screw rod is converted into the rotational movement of the screw nut in the lever torque measurement tooling;
[0086] S220: Drive the push rod assembly in the lever torque measurement tooling to rotate on a plane through the screw nut, so as to drive the lever of the endoscope to rotate synchronously through the push arm in the push rod assembly; and
[0087] S230: Through a computer, display and / or save the data measured by the tensile testing machine in real time.
[0088] In addition, the method for measuring the lever torque of the present application can be used in cooperation with a tensile testing machine driven by a computer, so that the measurement data can be displayed and / or saved in real time, which is beneficial to data analysis and technical improvement of endoscope products.
[0089] Under the condition that the basic principles of the present application are not changed, the technical features of the above embodiments can be combined. 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.
[0090] The above embodiments only express several implementation manners of the present application, and the description thereof is relatively specific and detailed. However, it should not be understood as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application.
Claims
1. Dial rod torque measurement tooling, characterized in that Used to measure the torque of the lever of an endoscope through a tensile testing machine, including: A fixing component, having a positioning cavity for fixing the endoscope and an opening communicating with the positioning cavity and for the lever of the endoscope to move; A bearing component, including an outer bearing ring fixedly provided on the fixing component and an inner bearing ring rotatably provided in the outer bearing ring; A lead screw component, including a lead screw sleeve fixedly connected to the inner bearing ring, a lead screw nut fixedly connected to the lead screw sleeve, and a lead screw rod threadedly connected to the lead screw nut and for connecting to the tensile arm of the tensile testing machine; and A push rod component, including a rotating arm fixedly connected to the lead screw nut and a pushing arm fixedly connected to the rotating arm and extending into the opening for pushing the lever.
2. The dial rod torque measurement tooling according to claim 1, wherein The bearing component and the lead screw component are coaxially arranged and are used to correspond to the rotation center of the lever of the endoscope.
3. The dial rod torsion measurement tooling according to claim 1, characterized in that The fixing component includes a bottom plate for being fixed by a clamping tool of the tensile testing machine, a cover plate provided with the opening, and a bracket installed on the cover plate to fix the outer bearing ring; the cover plate is detachably covered on the bottom plate to form the positioning cavity for fixing the endoscope.
4. The dial rod torque measurement tooling according to claim 3, characterized in that, The fixing component further includes at least two positioning posts protruding from the cover plate; the bracket is sleeved on the positioning posts to position and fix the bracket on the cover plate.
5. The dial lever torque measurement tooling according to claim 3, wherein The bearing component further includes a bearing upper pressing piece located above the outer bearing ring and a bearing lower pressing piece located below the inner bearing ring; the bearing upper pressing piece is fixedly connected to the bracket to relatively fix the outer bearing ring to the bracket; the bearing lower pressing piece is fixedly connected to the lead screw sleeve to relatively fix the inner bearing ring to the lead screw sleeve.
6. The toggle lever torque measurement tooling according to any one of claims 1 to 5, characterized in that The bearing component further includes bearing balls rollably provided between the outer bearing ring and the inner bearing ring to form a double-direction thrust ball bearing.
7. The toggle lever torque measurement tooling according to any one of claims 1 to 5, characterized in that The lead screw component is a ball screw.
8. The dial lever torque measurement tooling according to any one of claims 1 to 5, characterized in that One end of the rotating arm is sleeved on the lead screw nut and fixedly connected to the lead screw sleeve; the other end of the rotating arm is fixedly connected to the pushing arm.
9. The dial rod torque measurement tooling according to claim 8, wherein The rotating arm extends radially outward along the lead screw rod, and the pushing arm extends axially downward along the lead screw rod.
10. The dial rod torque measurement tooling according to claim 9, characterized in that, The other end of the rotating arm is provided with an arc-shaped groove for installing the pushing arm.
11. Method for measuring the torsion of a lever, characterized in that, Including steps: Before loading the endoscope into the positioning cavity of the lever torque measuring tooling according to any one of claims 1 to 10, perform an empty pull measurement on the lever torque measuring tooling through the tensile testing machine to obtain an initial calibration value; After loading the endoscope into the positioning cavity of the lever torque measuring tooling, perform an actual pull measurement on the lever torque measuring tooling through the tensile testing machine to obtain a tensile measurement value; And Based on the initial calibration value and the tensile measurement value, calculate the torque of the lever of the endoscope through a torque conversion model.
12. The lever torsion measurement method according to claim 11, characterized in that, The torque conversion model is: F’ = (F - F0) × P / (2Pi × R’); Wherein: F’ is the torque of the lever of the endoscope; F is the tensile measurement value; F0 is the initial calibration value; P is the lead of the lead screw rod in the lever torque measuring tooling; Pi is the pi; R’ is the lever force arm of the endoscope.
13. The method for measuring the torque of the lever according to claim 11, wherein After the endoscope is loaded into the positioning cavity of the torque measuring tooling for the lever, the step of performing actual pulling measurement on the torque measuring tooling for the lever by the tensile testing machine to obtain a tensile measurement value includes the steps of: Driving the tensile arm of the tensile testing machine to move up and down to drive the lead screw in the torque measuring tooling for the lever to move up and down, so that the up-and-down movement of the lead screw is converted into the rotational movement of the lead screw nut in the torque measuring tooling for the lever; Driving the push rod assembly in the torque measuring tooling for the lever to rotate on a plane through the lead screw nut, so as to drive the lever of the endoscope to rotate synchronously through the push arm in the push rod assembly; And Displaying and / or saving the data measured by the tensile testing machine in real time through a computer.