CN112858067A - Experiment frock of supersound sword gasket wear resistance evaluation and test - Google Patents

Abstract

The invention discloses an experimental tool for evaluating the wear resistance of an ultrasonic knife gasket, which comprises a control host, a test tool and an ultrasonic knife host, wherein the test tool comprises a bottom plate, a vertical plate, a cooling handle, a push rod fixing seat and a reciprocating driving mechanism, the vertical plate is provided with a knife bar component fixing seat and a knife handle fixing seat, one end of the cooling handle is provided with absorbent cotton, and the front side and the rear side of the push rod fixing seat are respectively provided with a front push rod and a rear push rod. The utility model provides an experiment frock through the reciprocating motion of push rod fixing base, can realize the circulation closure that the cutter was kept silent, and then the in-service use wearing and tearing of simulation gasket, simultaneously, keep silent and all cool off the cutter arbor at every turn closed to eliminate the influence that the friction intensification brought for the experimental result, when the gasket reachd life-span limit, regard as the evaluation standard of gasket wear resistance with the closed circulation number of times of keeping silent. Therefore, the experimental tool can accurately and reliably evaluate the wear resistance of the ultrasonic knife pad.

Description

Experiment frock of supersound sword gasket wear resistance evaluation and test

Technical Field

The invention relates to the technical field of performance evaluation of medical instruments, in particular to an experimental tool for evaluating the wear resistance of an ultrasonic knife pad.

Background

With the development of medical technology, endoscopic surgery is increasingly favored by doctors and patients as a novel surgical mode, and has the advantages of small surgical wound and the like. In laparoscopic surgery, ultrasonic knives are favored by the surgeons because of their advantages of good cutting coagulation ability, small thermal damage and the like.

The ultrasonic knife gasket is used as an important component of the jaw of the ultrasonic knife tool and mainly used for matching with the knife tool to grab tissues, and in the using process, the component is also a component which is easy to wear, and the wear resistance of the component directly influences the service life of the ultrasonic knife because the whole knife tool is scrapped due to the wear of the component, so that the wear resistance of the ultrasonic knife gasket is required to be evaluated by an experimental tool. At present, a tool which can accurately and reliably evaluate the wear resistance of the ultrasonic knife pad does not exist.

Disclosure of Invention

In view of this, the invention aims to provide an experimental tool for evaluating the wear resistance of an ultrasonic blade pad, so as to accurately and reliably evaluate the wear resistance of the ultrasonic blade pad.

The invention solves the problems through the following technical means: the utility model provides an experiment frock that supersound sword gasket wear resistance evaluated, includes main control system, test fixture and supersound sword host computer, the test fixture includes bottom plate, riser, cooling handle, push rod fixing base and drives push rod fixing base horizontal reciprocating motion's reciprocal actuating mechanism, install cutter arbor subassembly fixing base and handle of a knife fixing base on the riser, the cooling handle is through pivot and riser normal running fit, and the one end of cooling handle is provided with the cotton that absorbs water, preceding, the rear side of push rod fixing base are provided with preceding push rod and back push rod respectively.

Furthermore, limit switches are arranged at the front end and the rear end of the reciprocating driving mechanism, and limit switch induction sheets are arranged on the push rod fixing seat.

Further, preceding push rod cup joints with push rod fixing base horizontal slip, and the front end of preceding push rod rotates through the round pin axle and installs the gyro wheel, be provided with buffer spring between gyro wheel and the push rod fixing base.

Further, the rear push rod is horizontally sleeved with the push rod fixing seat in a sliding mode, a round head is integrally arranged at the rear end of the rear push rod, and a buffer spring is also arranged between the round head and the push rod fixing seat.

Furthermore, the upper side and the lower side of the cooling handle are both provided with limiting columns, and the limiting columns are installed on the vertical plate.

Further, the reciprocating driving mechanism can be a screw rod driving mechanism, a driving cylinder mechanism or a crank block mechanism.

Furthermore, the whole cooling handle is of a one-time bending structure and is in running fit with the vertical plate through the rotating shaft at the corner.

The invention has the beneficial effects that: the test tool for the ultrasonic cutter pad wear resistance evaluation comprises a control host, a test tool and an ultrasonic cutter host, wherein the test tool comprises a bottom plate, a vertical plate, a cooling handle, a push rod fixing seat and a reciprocating driving mechanism, the vertical plate is provided with a cutter bar component fixing seat and a cutter handle fixing seat, one end of the cooling handle is provided with absorbent cotton, and the front side and the rear side of the push rod fixing seat are respectively provided with a front push rod and a rear push rod. The utility model provides an experiment frock through the reciprocating motion of push rod fixing base, can realize the circulation closure that the cutter was kept silent, and then the in-service use wearing and tearing of simulation gasket, simultaneously, keep silent and all cool off the cutter arbor at every turn closed to eliminate the influence that the friction intensification brought for the experimental result, when the gasket reachd life-span limit, regard as the evaluation standard of gasket wear resistance with the closed circulation number of times of keeping silent. Therefore, the experimental tool can accurately and reliably evaluate the wear resistance of the ultrasonic knife pad.

Drawings

For a clearer explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the experimental tool;

FIG. 2 is a schematic structural diagram of a test fixture;

FIG. 3 is an enlarged schematic view of a jaw portion;

reference numerals: the test tool comprises a control host 1, atest tool 2, anultrasonic knife host 3, avertical plate 201, a limitingcolumn 202,absorbent cotton 203, acooling handle 204, areciprocating driving mechanism 205, abottom plate 206, a knife barcomponent fixing seat 207, aknife bar component 208, a knifehandle fixing seat 209, arear push rod 210, alimiting switch 211, abuffer spring 212, a limitingswitch induction sheet 213, a pushrod fixing seat 214, afront push rod 215, aroller 216, aknife handle 217, a bindingclip 2081, agasket 2082 and aknife bar 2083.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the present embodiment discloses an experimental tool for evaluating wear resistance of an ultrasonic knife pad, which includes a control host 1, atest tool 2, and anultrasonic knife host 3, wherein the control host controls working states of thetest tool 2 and theultrasonic knife host 3, and theultrasonic knife host 3 excites a knife bar of an ultrasonic knife tool as required. As shown in fig. 2 and 3, the ultrasonic cutting tool includes atool bar assembly 208 and atool shank 217, the tool bar assembly includes a tool tube, atool bar 2083, aclamp head 2081 and agasket 2082, a head end of the tool bar assembly is a jaw, theclamp head 2081 is disposed at the jaw, and thegasket 2082 is disposed at a lower side of theclamp head 2081. Bindingclip 2081 andcutter arbor 2083 are the metalwork, can not contact each other between the two, andgasket 2082 is the plastic part, when the gasket structure is complete, can form intact physics and keep apart, and the closure of keeping silent can not lead to the electric conductance of cutter arbor and binding clip, and when the gasket was damaged, when reacing the use limit, the closure of keeping silent will lead to electric conductance between bindingclip 2081 and thecutter arbor 2083 to lead to.

As shown in fig. 2, the test fixture includes abottom plate 206, avertical plate 201, acooling handle 204, areciprocating drive mechanism 205 and a pushrod fixing seat 214, thevertical plate 201 and thereciprocating drive mechanism 205 are installed on thebottom plate 206 in parallel, thevertical plate 201 is fixedly provided with a cutter barassembly fixing seat 207 and a cutterhandle fixing seat 209, and the cutter barassembly fixing seat 207 and the cutterhandle fixing seat 209 are respectively used for fixing acutter bar assembly 208 and acutter handle 217 of an ultrasonic knife. Thecooling handle 204 is integrally of a one-time bending structure, and is in rotating fit with thevertical plate 201 through a rotating shaft at a corner,water absorption cotton 203 is arranged at one end of thecooling handle 204, and the water absorption cotton absorbs water and can effectively cool the jaw after contacting the jaw. Preferably, the upper side and the lower side of the cooling handle are both provided with alimiting column 202, and thelimiting column 202 is installed on thevertical plate 201. The rotation of thecooling handle 204 can be limited by thelimiting column 202, so that the situation that the cooling handle is damaged when rotating clockwise and passing the head and the reliability of the system is influenced when rotating anticlockwise and passing the head is avoided.

The reciprocatingdriving mechanism 205 may be a screw rod driving mechanism, a driving cylinder mechanism, a slider-crank mechanism, or other mechanisms, in this embodiment, the screw rod driving mechanism is selected, and when a motor or a motor drives the screw rod of the screw rod driving mechanism to rotate in a reciprocating manner, the slider of the screw rod driving mechanism moves horizontally in a reciprocating manner.

The pushrod fixing seat 214 is fixedly connected with a sliding block of the screw rod driving mechanism, and the horizontal reciprocating movement of the sliding block can drive the push rod fixing seat to horizontally reciprocate; the front and rear sides of the pushrod fixing seat 214 are respectively provided with afront push rod 215 and arear push rod 210. The front end and the rear end of the reciprocating driving mechanism are both provided withlimit switches 211, the pushrod fixing seat 214 is provided with a limitswitch induction sheet 213, when the pushrod fixing seat 214 drives the limitswitch induction sheet 213 to move to the limit switch at the front end, thefront push rod 215 pushes the movable handle body of the knife handle to move, the jaw is closed, thetong head 2081 is meshed with thetong bar 2083, thegasket 2082 is subjected to single grinding, meanwhile, the limit switch at the front end is conducted to feed a signal back to the control host to start to calculate the single excitation time T2 of the ultrasonic knife tool, the single excitation time T2 is preset by a system, when the single excitation time T2 is reached, the motor or the motor drives the screw rod to rotate reversely, the slide block drives the pushrod fixing seat 214 to move towards the rear end, the jaw is opened, thegasket 2082 finishes single grinding, when the pushrod fixing seat 214 drives the limitswitch induction sheet 213 to move to, therear push rod 210 is far away from one end of theabsorbent cotton 203 by pushing thecooling handle 204, thecooling handle 204 is made to rotate relative to the rotating shaft, theabsorbent cotton 203 is made to contact the jaw, so that the jaw is cooled, meanwhile, a limit switch at the rear end is conducted, a signal is fed back to the control host, the cooling time T1 is calculated, the cooling time T1 is preset by a system, when the single cooling time T1 is reached, the motor or the motor drives the lead screw to rotate reversely again, the push rod fixing seat is made to move forwards, and therefore, the circular meshing of the jaw and the circular grinding of the gasket are achieved repeatedly. Preferably, in order to improve the buffering performance of thefront push rod 215 and therear push rod 210 for pushing corresponding components and reduce abrasion, thefront push rod 215 and therear push rod 210 are horizontally slidably sleeved with a pushrod fixing seat 214, aroller 216 is rotatably mounted at the front end of thefront push rod 215 through a pin shaft, and a buffering spring is arranged between the roller and the push rod fixing seat; the rear end of therear push rod 210 is integrally provided with a round head, and abuffer spring 212 is also arranged between the round head and the push rod fixing seat.

During the experiment, firstly, the ultrasonic knife tool is fixed to thetest tool 2, specifically, theknife bar assembly 208 is fixed through the knife barassembly fixing seat 207, theknife handle 217 is fixed through the knifehandle fixing seat 209, then, the cooling time T1 and the excitation time T2 are set, wherein the energy output level of the ultrasonic knife is determined, the experimental intensity of the experiment is determined according to the parameters, obviously, the higher the energy output is, the longer the excitation time T2 is, the higher the test intensity is, the more serious the abrasion of the gasket caused by single excitation is, and a user needs to select appropriate parameters for testing according to actual needs. And finally, starting the test tool, automatically recording the cycle number of closing the jaw by the control host machine until the control host machine detects that the gasket is worn to the limit use state, finishing the experiment, and taking the cycle number of closing the jaw as the evaluation standard of the wear resistance of the gasket, wherein the more the cycle number is, the better the wear resistance is, and otherwise, the worse the wear resistance is. The judgment basis of the gasket worn to the limit use state is as follows: when the gasket is worn to the limit state, the clamp head is electrically conducted with the clamp rod, the state signal is fed back to the control host, and the control host judges that the gasket is worn to the limit use state.

In the experiment, the cooling time T1 is determined by the on-time of the rear limit switch, and the excitation time T2 is determined by the on-time of the front limit switch. The reciprocatingdriving mechanism 205 drives the pushrod fixing seat 214 to horizontally reciprocate, when the limitswitch induction sheet 213 moves to the limit switch at the rear end, the limit switch at the rear end is turned on, and when the limit switch induction sheet moves to the limit switch at the front end, the limit switch at the front end is turned on.

It is necessary to say that: the specific control circuit and signal feedback circuit of this frock are prior art, and this no longer gives details.

In summary, the experimental tool for evaluating the wear resistance of the ultrasonic knife gasket in the embodiment simulates the wear of the gasket in actual use by closing the jaw for a short time and grinding the gasket by the knife bar, and meanwhile, the knife bar is cooled by closing the jaw each time, so that the influence on the experimental result caused by long-time friction and temperature rise of the knife bar is eliminated. The strength of the experiment is controlled by controlling the continuous grinding time (excitation time), when the tong head is electrically conducted with the cutter bar, the fact that the gasket is damaged is meant, the cutter bar cannot be protected, the judgment basis is taken as the judgment basis for the limit of the service life of the gasket, when the gasket reaches the limit of the service life, the cycle number of the closing of the tong mouth is taken as the evaluation standard of the wear resistance of the gasket, the more the cycle number is, the better the wear resistance is, and otherwise, the worse the wear resistance is. Therefore, the experimental tool can accurately and reliably evaluate the wear resistance of the ultrasonic knife pad.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (7)

1. The utility model provides an experiment frock of supersound sword gasket wear resistance evaluation which characterized in that: including main control system (1), test fixture (2) and supersound sword host computer (3), test fixture includes bottom plate (206), riser (201), cooling handle (204), push rod fixing base (214) and drive push rod fixing base horizontal reciprocating motion's reciprocal actuating mechanism (205), install cutter arbor subassembly fixing base (207) and handle of a knife fixing base (209) on the riser, the cooling handle is through pivot and riser normal running fit, and the one end of cooling handle is provided with cotton (203) that absorb water, preceding, the rear side of push rod fixing base are provided with preceding push rod (215) and back push rod (210) respectively.

2. The experimental tool for evaluating the wear resistance of the ultrasonic knife pad according to claim 1, characterized in that: the front end and the rear end of the reciprocating driving mechanism are both provided with limit switches (211), and the push rod fixing seat is provided with a limit switch induction sheet (213).

3. The experimental tool for evaluating the wear resistance of the ultrasonic blade pad according to claim 2, characterized in that: preceding push rod (215) and push rod fixing base (214) horizontal slip cup joint, the front end of preceding push rod is rotated through the round pin axle and is installed gyro wheel (216), be provided with buffer spring (212) between gyro wheel and the push rod fixing base.

4. The experimental tool for evaluating the wear resistance of the ultrasonic blade pad according to claim 3, wherein: rear push rod (210) and push rod fixing base (214) horizontal slip cup joint, rear push rod's rear end an organic whole is provided with the button head, also be provided with buffer spring between button head and the push rod fixing base.

5. The experimental tool for the ultrasonic blade gasket wear resistance evaluation according to any one of claims 1 to 4, characterized in that: the upper side and the lower side of the cooling handle are both provided with limiting columns (202), and the limiting columns are installed on the vertical plate.

6. The experimental tool for evaluating the wear resistance of the ultrasonic knife pad according to claim 5, characterized in that: the reciprocating driving mechanism (205) can be a screw rod driving mechanism, a driving cylinder mechanism or a crank block mechanism.

7. The experimental tool for evaluating the wear resistance of the ultrasonic knife pad according to claim 6, characterized in that: the cooling handle (204) is integrally of a one-time bending structure and is in rotating fit with the vertical plate through a rotating shaft at the corner.

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