CN115144281A - Device and method for testing flexural fatigue of snake bone of endoscope - Google Patents
Device and method for testing flexural fatigue of snake bone of endoscope Download PDFInfo
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- CN115144281A CN115144281A CN202211077968.5A CN202211077968A CN115144281A CN 115144281 A CN115144281 A CN 115144281A CN 202211077968 A CN202211077968 A CN 202211077968A CN 115144281 A CN115144281 A CN 115144281A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
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Abstract
The invention discloses an endoscope snake bone bending fatigue testing device and method, which comprises an endoscope snake bone fixing device, a three-axis acceleration sensor, a steering engine driving device and a wire drawing fixing and clamping device; the endoscope snake bone fixing device is used for clamping a bent snake bone of an endoscope; the three-axis acceleration sensor is arranged at one end of the bent snake bone of the endoscope and used for measuring and testing bending force and creep deformation conditions in real time; the other end of the endoscope bending snake bone is uniformly provided with an upward bending wire drawing, a downward bending wire drawing, a leftward bending wire drawing and a rightward bending wire drawing in the circumferential direction; the wire drawing fixing and clamping device is used for clamping upward bent wire drawing, downward bent wire drawing, leftward bent wire drawing and rightward bent wire drawing respectively; the steering engine driving device is used for driving the wire drawing fixing and clamping device, and the bending angles of the bent snake bone of the endoscope in the four directions of upward, downward, left and right are controlled by controlling the drawing distance of the wire drawing. The device has good wire drawing clamping effect and high testing efficiency.
Description
Technical Field
The invention relates to the field of endoscope product reliability testing, in particular to a device and a method for testing bending fatigue of a snake bone of an endoscope.
Background
The endoscope is a common medical device product, and the function of the endoscope comprises that the head can be bent at different angles in four directions, namely upward, downward, left and right directions, so that the gastrointestinal endoscope cavity can be observed in real time at multiple angles. This function is mainly performed by the snake bone device, so the reliability of the snake bone bending fatigue is very critical. Four steel wires are welded on the snake bone, bending in the upper direction, the lower direction, the left direction and the right direction is controlled respectively, and according to market application requirements, the bending angle is up to 210 degrees, down to 90 degrees, left to 100 degrees and right to 100 degrees.
If the bending fatigue test limit life and the aging process of the endoscope are finished through manual test, uncontrollable factors such as poor repeatability and accuracy are caused, counting is not good, simple and rapid test is not good, and manpower is consumed. Therefore, it is necessary to develop a testing system, which can automatically test and count the fatigue bending times, and is convenient for the automatic mass production detection control of the production line, and the operation process is simple.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a device and a method for testing bending fatigue of a snake bone of an endoscope.
The invention achieves the purpose through the following technical scheme: the first aspect of the embodiment of the invention provides a testing device for bending fatigue of a snake bone of an endoscope, which comprises an endoscope snake bone fixing device, a three-axis acceleration sensor, a steering engine driving device and a wire drawing fixing and clamping device;
the endoscope snake bone fixing device is used for clamping a bent snake bone of an endoscope;
the three-axis acceleration sensor is arranged at one end of the bent snake bone of the endoscope and used for measuring and testing bending force and creep deformation conditions in real time;
the other end of the endoscope bending snake bone is uniformly provided with an upward bending wire drawing, a downward bending wire drawing, a leftward bending wire drawing and a rightward bending wire drawing in the circumferential direction;
the wire drawing fixing and clamping device is used for clamping upward bent wire drawing, downward bent wire drawing, leftward bent wire drawing and rightward bent wire drawing respectively;
the steering engine driving device is used for driving the wire drawing fixing and clamping device, and the bending angles of the bent snake bone of the endoscope in the four directions of upward, downward, left and right are controlled by controlling the drawing distance of the wire drawing.
Further, the endoscope snake bone fixing device is a clamping vice.
Further, the wire drawing fixing and clamping device comprises an upper bending rotary table, a lower bending rotary table, a left bending rotary table and a right bending rotary table, wherein the upper bending rotary table and the lower bending rotary table are connected with an upward bending wire drawing and a downward bending wire drawing to control the snake bones of the endoscope to be bent up and down respectively; the left and right bending turntables are connected with the left bending wire drawing and the right bending wire drawing to control the snake bones of the endoscope to be bent left and right respectively; the diameter of the upward bending rotary disc is slightly larger than that of the downward bending rotary disc, and the diameter of the leftward bending rotary disc is equal to that of the rightward bending rotary disc.
Furthermore, the upper and lower bending turntables comprise a first turntable connecting part, an upward bending turntable and a downward bending turntable are respectively arranged at two ends of the first turntable connecting part, and the bottom of the first turntable connecting part is connected with a steering engine driving device; the left and right bending turnplates comprise second turnplate connecting parts, the two ends of the second turnplate connecting part are respectively provided with a left bending turnplate and a right bending turnplate, and the bottom of the second turnplate connecting part is connected with a steering engine driving device.
Further, the first and second turntable connecting parts are designed to be of a race type.
Furthermore, the bottoms of the upward bending rotary table, the downward bending rotary table, the leftward bending rotary table and the rightward bending rotary table are at least provided with two fixing holes, and the fixing holes are used for fixing the drawn wires; and the upward bending turntable, the downward bending turntable, the leftward bending turntable and the rightward bending turntable are provided with threaded grooves for winding drawn wires.
Furthermore, the threaded grooves arranged on the upward bending rotary table, the downward bending rotary table, the leftward bending rotary table and the rightward bending rotary table are U-shaped, V-shaped, arc-shaped, square or trapezoidal.
Further, the aperture of the fixing hole is slightly larger than the diameter of the bent snake bone wire of the endoscope.
Further, the steering engine driving device comprises an up-and-down bending driving motor and a left-and-right bending driving motor; and the output ends of the upper bending driving motor, the lower bending driving motor and the left bending driving motor and the right bending driving motor are respectively connected with a first rotary table connecting part and a second rotary table connecting part in the wire drawing fixing and clamping device through a steering wheel.
A second aspect of the embodiments of the present invention provides a method for testing flexural fatigue of a snake bone of an endoscope, which is implemented based on the above apparatus for testing flexural fatigue of a snake bone of an endoscope, and the method specifically includes the following steps:
s1, fixing the bent end of the snake bone of the endoscope by using a fixing device, respectively fixing drawn wires on a drawn wire fixing and clamping device, and rotating a steering engine driving device to adjust the lengths of the drawn wires until the snake bone of the endoscope is bent in place;
s2, an up-and-down bending driving motor rotates, an up-bending turntable drives an up-bending wire drawing to stretch, and a snake bone of the endoscope bends upwards by 210 degrees; the up-and-down bending driving motor is reset and then rotates in the opposite direction, the downward bending turntable drives the downward bending wire drawing to stretch, the snake bone of the endoscope bends downwards by 90 degrees, the up-and-down bending driving motor is reset, and the snake bone state of the endoscope is also reset; the left and right bending driving motors rotate, the left bending turntable drives the left bending wire drawing to stretch, and the snake bone of the endoscope bends 100 degrees to the left; the left and right bending driving motors are reset and then rotate in the opposite direction, the right bending turntable drives the right bending wire drawing to stretch, the snake bone of the endoscope bends 100 degrees rightwards, the left and right bending driving motors are reset, and the state of the snake bone of the endoscope is also reset.
And S3, circulating the step S2 to measure the bending fatigue for a specified number of times.
The invention has the following beneficial effects: the invention provides a device and a method for testing bending fatigue of a snake bone of an endoscope, which are characterized in that bending testing is driven by an automatic steering engine, automatic detection is realized, manpower is greatly reduced, a testing result is more real, more accurate and more precise, testing efficiency is improved, manufacturing cost is low, and the structure is simple. In the testing device provided by the invention, the bending end of the snake bone of the endoscope is connected with the three-axis acceleration sensor, so that the defect that the prior art cannot sense the tiny changes such as the creep deformation of a steel wire in the testing process is overcome, the judgment of whether the bending is completely bent or not and whether the bending is consistent or not is facilitated, and the testing precision, the accuracy and the consistency are improved. In the testing device provided by the invention, the steering engine driving device adopts two steering engines to realize stretching in four directions through reciprocating motion, wherein the steering engines have the characteristics of simple structure, easiness in maintenance, low power consumption, high control precision and the like. The wire drawing fixing and clamping device adopts a thread structure and hole positions to fix the wire drawing, and can conveniently realize disassembly and position adjustment. The device also comprises a counting screen for displaying the bending fatigue times and the progress of the test in the upper, lower, left and right directions, and is more visual.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic view of the device for recovering snake bone of the present invention;
FIG. 2 is a schematic structural view of an endoscope snake bone;
FIG. 3 is a schematic structural view of a snake bone wire drawing fixation;
FIG. 4 is a schematic view of the device with the snake bone bent upwards by 210 degrees;
FIG. 5 is a schematic view of the device with the snake bone bent downwardly by 90 deg.;
FIG. 6 is a schematic view of the device with the snake bone bent 100 to the left;
FIG. 7 is a schematic view of the device with the snake bone bent 100 to the right;
in the figure, 1-endoscope bending snake bone, 2-clamping vice, 3-triaxial acceleration transducer, 41-up and down bending driving motor, 42-left and right bending driving motor, 51-upward bending turntable, 52-downward bending turntable, 53-leftward bending turntable, 54-rightward bending turntable, 61-upward bending wire drawing, 62-downward bending wire drawing, 63-leftward bending wire drawing, 64-rightward bending wire drawing and 7-fixing hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
As shown in figure 1, the invention provides a testing device for bending fatigue of a snake bone of an endoscope, which saves testing manpower and material resources, can synchronously carry out bending tests at four angles, namely up, down, left and right angles, has adjustable testing angles and visual testing times and other processes, and can carry out bending tests in four directions only by two steering engines. Through the rational fixed steel wire of helicitic texture and aperture, actual measurement pulling force 2N can be fine fixed, can increase fixed orifices and thread length under the big a little circumstances of pulling force, and the welding can be adjusted the position of steel wire in a flexible way to this kind of structure, can dismantle advantages such as. And the head is equipped with triaxial acceleration sensor, can test bending force, contains the creep process that takes place, improves the measuring accuracy, can judge simultaneously whether totally crooked, whether crooked unanimity.
Specifically, the testing device for the bending fatigue of the snake bone of the endoscope comprises an endoscope snake bone fixing device (a common easily-obtained clamping vice 2 is selected in the embodiment of the invention), a three-axis acceleration sensor 3, a steering engine driving device and a wire drawing fixing and clamping device; the endoscope snake bone fixing device is used for clamping the endoscope bent snake bone 1, the three-axis acceleration sensor 3 is pasted at one end of the endoscope bent snake bone 1 and used for measuring and testing bending force and creep deformation conditions in real time, so that the bending angle of the snake bone at the front end is accurately controlled, and the bending fatigue testing precision is improved. As shown in fig. 2, the other end of the bent snake bone 1 of the endoscope is uniformly provided with an upward bending wire 61, a downward bending wire 62, a leftward bending wire 63 and a rightward bending wire 64 in the circumferential direction. The wire drawing fixing and clamping device is used for respectively and fixedly clamping an upward bent wire drawing 61, a downward bent wire drawing 62, a leftward bent wire drawing 63 and a rightward bent wire drawing 64. The steering engine driving device is used for driving the wire drawing fixing and clamping device, and further controlling the bending angles of the bent snake bone 1 of the endoscope in the four directions of up, down, left and right by controlling the drawing distance of the wire drawing.
In the embodiment of the invention, the three-axis acceleration sensor 3 is an MPU6050 three-axis acceleration sensor, as shown in fig. 1, the three-axis acceleration sensor 3 is fixed at the bending front end of the snake bone of the endoscope through a lead, and the lead can be fixed at the bending front end of the snake bone of the endoscope through an adhesive. The triaxial acceleration sensor 3 can sense the bending force during testing, can sense and feed back when creep occurs or abnormality occurs in the testing process, and can suspend testing to readjust resetting when necessary, so that the testing precision can be improved, and the change in the testing process can be obtained.
The wire drawing fixing and clamping device comprises an upper bending rotary table, a lower bending rotary table, a left bending rotary table and a right bending rotary table, and is shown in figure 3. The upper and lower bending turntables are connected with the upward bending wire drawing and the downward bending wire drawing, and the left and right bending turntables are connected with the leftward bending wire drawing and the rightward bending wire drawing.
The upper and lower bending turntables comprise a first turntable connecting part, an upward bending turntable 51 and a downward bending turntable 52 are respectively arranged at two ends of the first turntable connecting part, and the bottom of the first turntable connecting part is fixed with a steering wheel on an upper and lower bending driving motor 41 in the steering engine driving device. Correspondingly, the left and right bending turnplates comprise a second turnplate connecting part, a left bending turnplate 53 and a right bending turnplate 54 are respectively arranged at two ends of the second turnplate connecting part, and the bottom of the second turnplate connecting part is fixed with a steering wheel on the left and right bending driving motor 42 in the steering engine driving device. The first rotary table connecting part and the second rotary table connecting part in the embodiment of the invention are designed to be of a runway shape. Wherein, the upward bending turntable 51, the downward bending turntable 52, the leftward bending turntable 53 and the rightward bending turntable 54 are provided with threads for increasing friction force when winding and drawing wires. Illustratively, the cross-section of the thread groove is U-shaped, V-shaped, circular arc-shaped, square, trapezoid, or the like. The bottoms of the upward bending turntable 51, the downward bending turntable 52, the leftward bending turntable 53 and the rightward bending turntable 54 are at least provided with two fixing holes 7, the hole diameter of each fixing hole 7 is slightly larger than the diameter of the wire drawing of the bent snake bone of the endoscope, the wire drawing tail is used for fixing the wire drawing tail, and the adjustable wire drawing is movable (namely the wire drawing is stretched around the bending turntable under the driving of the steering engine driving device to drive the snake bone of the endoscope to bend). When the test tension is 2N in the embodiment of the invention, the bent snake bone 1 of the endoscope can be bent in place. In the case of a higher tension application, the thread length can be increased and/or the fixing hole 7 can be added.
Preferably, in the embodiment of the present invention, the upward bending rotary disk 51, the downward bending rotary disk 52, the leftward bending rotary disk 53 and the rightward bending rotary disk 54 are cylindrical, wherein the diameter of the upward bending rotary disk 51 is slightly larger than that of the downward bending rotary disk 52, because the upward bending angle is larger than that of the downward bending angle. The leftward curved dial 53 is equal in diameter to the rightward curved dial 54.
The steering engine driving device comprises an upper bending driving motor 41, a lower bending driving motor 41, a left bending driving motor 42 and a right bending driving motor 42, wherein the upper bending driving motor 41, the lower bending driving motor 41, the left bending driving motor 42 and the right bending driving motor 42 are both MG996R steering engines, and the MG996R steering engines are economical and practical and have small testing energy consumption. The up-down bending driving motor 41 and the left-right bending driving motor 42 are fixed on the rack through a steering engine bracket. The output ends of the up-and-down bending driving motor 41 and the left-and-right bending driving motor 42 are connected with the wire drawing fixing and clamping device through a rudder disc.
Furthermore, the testing device for the bending fatigue of the snake bone of the endoscope further comprises a microcontroller MCU, wherein the microcontroller MCU calculates data collected by the triaxial acceleration sensor and displays the testing times and states through a display screen, and the testing times comprise the times in the upper direction, the lower direction, the left direction and the right direction. The microcontroller MCU sets up on PCB circuit board, and PCB circuit board is connected with external power supply. In the embodiment of the invention, the microcontroller MCU includes but is not limited to STC15 series, STM8 series, STM32 series, and the like. The display screen includes but is not limited to an LCD display screen and the like.
In another aspect, the embodiment of the invention provides a method for testing flexural fatigue of a snake bone of an endoscope, which comprises the following steps:
s1, fixing the bent end of the snake bone of the endoscope by using a fixing device, respectively fixing drawn wires (an upward bending drawn wire 61, a downward bending drawn wire 62, a leftward bending drawn wire 63 and a rightward bending drawn wire 64) on a drawn wire fixing and clamping device (an upward bending turntable 51, a downward bending turntable 52, a leftward bending turntable 53 and a rightward bending turntable 54), and rotating a steering engine driving device to adjust the length of the drawn wires until the snake bone of the endoscope is bent in place;
s2, as shown in FIG. 4, the up-and-down bending driving motor 41 rotates, the upward bending turntable 51 drives the upward bending wire 61 to stretch, and the snake bone of the endoscope bends upwards by 210 degrees; as shown in fig. 5, the up-and-down bending driving motor 41 is reset and then rotates in the opposite direction, the downward bending turntable 52 drives the downward bending wire 62 to stretch, the endoscope snake bone bends 90 degrees downward, the up-and-down bending driving motor 41 is reset, and the endoscope snake bone state is also reset; as shown in FIG. 6, the left-right bending drive motor 42 is rotated, the left bending turntable 53 drives the left bending wire 63 to stretch, and the endoscope snake bone bends 100 degrees to the left, as shown in FIG. 7, the left-right bending drive motor 42 is reset and then rotated in the opposite direction, the right bending turntable 54 drives the right bending wire 64 to stretch, and the endoscope snake bone bends 100 degrees to the right, and the left-right bending drive motor 42 is reset, and the state of the endoscope snake bone is also reset.
And S3, circulating the step S2 to measure the bending fatigue for a specified number of times.
Example 1
The embodiment 1 of the invention provides a testing device and a testing method for bending fatigue of a snake bone of an endoscope, and the testing device comprises a clamping vice 2, a three-axis acceleration sensor 3, an up-and-down bending driving motor 41, a left-and-right bending driving motor 42, a display counting device and a wire drawing fixing clamping device (an up-bending turntable 51, a down-bending turntable 52, a left-bending turntable 53 and a right-bending turntable 54). Wherein, the steering wheel adopts MG996R, and is economical and practical, and the test energy consumption is little. The clamping device is fixed with four wire drawing (the wire drawing of bending upwards 61, the wire drawing of bending downwards 62, the wire drawing of bending leftwards 63 and the wire drawing of bending rightwards 64) and controls four directions of upper and lower, left and right sides are crooked respectively, can carry out the cyclic bending test of four directions simultaneously, through the clamping position of adjustment steel wire, clamping device's size and steering wheel turned angle control steel wire tensile distance further control snake bone bending angle, crooked snake bone department is with triaxial acceleration sensor test bending force and creep deformation condition, thereby accurate control front end snake bone bending angle, improve bending fatigue test precision.
The invention adopts two steering engines (an up-down bending driving motor 41 and a left-right bending driving motor 42) and can control the stretching in four directions through reciprocating motion. And under the conventional condition, four steering engines are required to control the stretching in four directions respectively. The up-down bending driving motor 41 and the left-right bending driving motor 42 are fixed on the test board by adopting matched steering engine supports.
The wire drawing fixing and clamping device comprises an upper bending turntable, a lower bending turntable, a left bending turntable and a right bending turntable. The upward bending turntable 51, the downward bending turntable 52, the leftward bending turntable 53 and the rightward bending turntable 54 are all provided with threads for increasing the friction force of the steel wire, the cross section of the threaded groove can be designed into a U shape, a V shape, a circular arc shape, a square shape or a trapezoid shape, and the cross section of the threaded groove arranged in embodiment 1 of the invention is U-shaped. The bottoms of the upward bending rotary disc 51, the downward bending rotary disc 52, the leftward bending rotary disc 53 and the rightward bending rotary disc 54 are provided with at least two fixing holes 7. In the embodiment of the invention, the diameter of the drawn wire is 0.6mm. The aperture of the two fixing holes 7 is slightly larger than the diameter of the drawn wire, and the two fixing holes are used for fixing the tail part of the drawn wire and are adjustable and movable. In the embodiment of the invention, when the tension is only 2N, the snake bone can be bent in place, and the thread length and the number of holes can be increased under a larger tension application scene. In the embodiment of the present invention, the diameter of the upward bending rotary disk 51 is slightly larger than that of the downward bending rotary disk 52, because the upward bending angle 210 degrees is larger than the downward bending angle 90 degrees. The leftward bending dial 53 is equal in diameter to the rightward bending dial 54 because both the leftward bending angle and the rightward bending angle are 100 degrees.
When the device is used for testing, an upward bending rotary disc 51 in the wire drawing fixing and clamping device fixedly clamps an upward bending wire drawing 61 and controls the downward bending of the snake bone of the endoscope, a downward bending rotary disc 52 in the wire drawing fixing and clamping device fixedly clamps a downward bending wire drawing 62 of a steel wire and controls the upward bending of the snake bone of the endoscope, a leftward bending rotary disc 53 in the wire drawing fixing and clamping device fixedly clamps a leftward bending wire drawing 63 and controls the leftward bending of the snake bone, and a rightward bending rotary disc 54 in the wire drawing fixing and clamping device fixedly clamps a rightward bending wire drawing 64 and controls the rightward bending of the snake bone.
The snake bone part at the bent front end of the endoscope is connected with a triaxial acceleration sensor 3 through a conductive connecting wire, and the conductive connecting wire can be fixed at the bent front end of a product through an adhesive. The triaxial acceleration sensor 3 can sense the bending force during testing, can sense and feed back when creep occurs or abnormality occurs in the testing process, and can suspend testing if necessary so as to readjust resetting, so that the testing precision can be improved, and the change in the testing process can be obtained. By adopting the triaxial acceleration sensor, the test precision can be greatly improved, the changes of steel wire creep deformation and the like in the test process can be sensed, the bending consistency at each time and the bending in place can be ensured, and the steel wire can be suspended and adjusted in place when the changes occur.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings, or applied directly or indirectly to other related systems, are included in the scope of the present invention.
Claims (10)
1. A testing device for bending fatigue of an endoscope snake bone is characterized by comprising an endoscope snake bone fixing device, a three-axis acceleration sensor, a steering engine driving device and a wire drawing fixing and clamping device;
the endoscope snake bone fixing device is used for clamping a bent snake bone of an endoscope;
the three-axis acceleration sensor is arranged at one end of the bent snake bone of the endoscope and used for measuring and testing bending force and creep deformation conditions in real time;
the other end of the bent snake bone of the endoscope is uniformly provided with upward bent wire drawing, downward bent wire drawing, leftward bent wire drawing and rightward bent wire drawing according to the circumferential direction;
the wire drawing fixing and clamping device is used for clamping upward bent wire drawing, downward bent wire drawing, leftward bent wire drawing and rightward bent wire drawing respectively;
the steering engine driving device is used for driving the wire drawing fixing and clamping device, and the bending angles of the bent snake bone of the endoscope in the four directions of upward, downward, left and right are controlled by controlling the drawing distance of the wire drawing.
2. The endoscopic snake bone bending fatigue testing device according to claim 1, wherein said endoscopic snake bone fixation device is a clamping vise.
3. The apparatus for testing the flexural fatigue of the snake bone of the endoscope, as claimed in claim 1, wherein said wire-drawing fixing and clamping means comprises an upper and lower bending turntable and a left and right bending turntable, said upper and lower bending turntable is connected to the upward bending wire-drawing and the downward bending wire-drawing for controlling the snake bone of the endoscope to bend upward and downward respectively; the left and right bending turntables are connected with the left bending wire drawing and the right bending wire drawing and are used for controlling the snake bones of the endoscope to be bent left and right respectively; the diameter of the upward bending turntable is larger than that of the downward bending turntable, and the diameter of the leftward bending turntable is equal to that of the rightward bending turntable.
4. The device for testing the flexural fatigue of the snake bone of the endoscope as defined in claim 3, wherein the upper and lower flexural turnplates comprise a first turnplate connecting portion, an upward flexural turnplate and a downward flexural turnplate are respectively provided at both ends of the first turnplate connecting portion, and the bottom of the first turnplate connecting portion is connected to a steering engine driving device; the left and right bending turnplates comprise second turnplate connecting parts, the two ends of the second turnplate connecting part are respectively provided with a leftward bending turnplate and a rightward bending turnplate, and the bottom of the second turnplate connecting part is connected with a steering engine driving device.
5. The apparatus for testing flexural fatigue of an endoscope snake bone according to claim 4, wherein said first and second turntable connecting portions are designed as a race track type.
6. The device for testing the flexural fatigue of the snake bone of an endoscope, which is characterized in that the bottoms of the upward bending turntable, the downward bending turntable, the leftward bending turntable and the rightward bending turntable are provided with at least two fixing holes, and the fixing holes are used for fixing the pull wires; and the upward bending rotary table, the downward bending rotary table, the leftward bending rotary table and the rightward bending rotary table are provided with threaded grooves for winding and drawing wires.
7. The apparatus for testing flexural fatigue of an endoscope snake bone according to claim 6, wherein the thread grooves formed on the upward bending rotary disk, the downward bending rotary disk, the leftward bending rotary disk and the rightward bending rotary disk are U-shaped, V-shaped, circular arc-shaped, square or trapezoid.
8. The device for testing flexural fatigue of an endoscopic snake bone according to claim 6, wherein the diameter of the hole for said fixation is slightly larger than the diameter of the wire for endoscopic bending snake bone.
9. The device for testing the flexural fatigue of the snake bone of the endoscope as claimed in claim 1 or 4, wherein the steering engine driving device comprises an up-down bending driving motor and a left-right bending driving motor; and the output ends of the upper bending driving motor, the lower bending driving motor and the left bending driving motor and the right bending driving motor are respectively connected with a first rotary table connecting part and a second rotary table connecting part in the wire drawing fixing and clamping device through a steering wheel.
10. A method for testing flexural fatigue of a snake bone of an endoscope, which is realized based on the device for testing flexural fatigue of a snake bone of an endoscope according to any one of the claims 1 to 9, and is characterized by comprising the following steps:
s1, fixing the bent end of the snake bone of the endoscope by using a fixing device, respectively fixing drawn wires on a drawn wire fixing and clamping device, and rotating a steering engine driving device to adjust the length of the drawn wires until the snake bone of the endoscope is bent in place;
s2, driving a motor to rotate in an up-and-down bending mode, driving an up-bending rotary table to drive an up-bending wire drawing to stretch, and bending a snake bone of the endoscope by 210 degrees upwards; the up-and-down bending driving motor is reset and then rotates in the opposite direction, the downward bending turntable drives the downward bending wire drawing to stretch, the snake bone of the endoscope bends downwards by 90 degrees, the up-and-down bending driving motor is reset, and the snake bone state of the endoscope is also reset; the left and right bending driving motors rotate, the left bending turntable drives the left bending wire drawing to stretch, and the snake bone of the endoscope bends 100 degrees to the left; the left and right bending driving motor is reset and then rotates in the opposite direction, the right bending turntable drives the right bending wire drawing to stretch, the snake bone of the endoscope bends 100 degrees rightwards, the left and right bending driving motor is reset, and the state of the snake bone of the endoscope is also reset;
and S3, circulating the step S2 to measure the bending fatigue for a specified number of times.
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