CN112858067B

CN112858067B - Experiment frock of supersound sword gasket wear resistance evaluation and test

Info

Publication number: CN112858067B
Application number: CN202011558305.6A
Authority: CN
Inventors: 李益民; 李霹
Original assignee: Hunan Handlike Minimally Invasive Surgery Co ltd
Current assignee: Hunan Handlike Minimally Invasive Surgery Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2022-07-26
Anticipated expiration: 2040-12-25
Also published as: CN112858067A

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 experiment tool for evaluating the wear resistance of an ultrasonic knife pad, so as to accurately and reliably evaluate the wear resistance of the ultrasonic knife 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, the front end and the rear end of the reciprocating driving mechanism are both provided with limit switches, and the push rod fixing seat is provided with a limit switch induction sheet.

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.

Furthermore, the rear push rod is horizontally sleeved with the push rod fixing seat in a sliding manner, 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

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described 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 may 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 the jaw portion;

reference numerals are as follows: the test tool comprises a control host 1, a test tool 2, an ultrasonic knife host 3, a vertical plate 201, a limiting column 202, water absorption cotton 203, a cooling handle 204, a reciprocating driving mechanism 205, a bottom plate 206, a knife bar component fixing seat 207, a knife bar component 208, a knife handle fixing seat 209, a rear push rod 210, a limiting switch 211, a buffer spring 212, a limiting switch induction sheet 213, a push rod fixing seat 214, a front push rod 215, a roller 216, a knife handle 217, a clamp head 2081, a gasket 2082 and a knife 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, a test tool 2, and an ultrasonic knife host 3, wherein the control host controls working states of the test tool 2 and the ultrasonic knife host 3, and the ultrasonic 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 comprises a tool bar assembly 208 and a tool shank 217, the tool bar assembly comprises a tool tube, a tool bar 2083, a clamp head 2081 and a gasket 2082, the head end of the tool bar assembly is a clamp jaw, the clamp head 2081 is arranged at the clamp jaw, and the gasket 2082 is arranged at the lower side of the clamp head 2081. Binding clip 2081 and cutter arbor 2083 are the metalwork, can not contact each other between the two, and gasket 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 binding clip 2081 and the cutter arbor 2083 to lead to.

As shown in fig. 2, the test fixture includes a bottom plate 206, a vertical plate 201, a cooling handle 204, a reciprocating drive mechanism 205 and a push rod fixing seat 214, the vertical plate 201 and the reciprocating drive mechanism 205 are installed on the bottom plate 206 in parallel, the vertical plate 201 is fixedly provided with a cutter bar assembly fixing seat 207 and a cutter handle fixing seat 209, and the cutter bar assembly fixing seat 207 and the cutter handle fixing seat 209 are respectively used for fixing a cutter bar assembly 208 and a cutter handle 217 of an ultrasonic knife. The cooling handle 204 is integrally of a one-time bending structure, and is in rotating fit with the vertical plate 201 through a rotating shaft at a corner, water absorption cotton 203 is arranged at one end of the cooling 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 a limiting column 202, and the limiting column 202 is installed on the vertical plate 201. The rotation of the cooling handle 204 can be limited by the limiting 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 reciprocating driving mechanism 205 may be a screw rod driving mechanism, a driving cylinder mechanism, a slider-crank mechanism, or the like, in this embodiment, the screw rod driving mechanism is selected, and when a motor or the like drives the screw rod of the screw rod driving mechanism to rotate in a reciprocating manner, the slider of the screw rod driving mechanism may horizontally reciprocate.

The push rod 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 push rod fixing seat 214 are respectively provided with a front push rod 215 and a rear push rod 210. The front end and the rear end of the reciprocating driving mechanism are both provided with a limit switch 211, the push rod fixing seat 214 is provided with a limit switch induction sheet 213, when the push rod fixing seat 214 drives the limit switch induction sheet 213 to move to the limit switch at the front end, the front push rod 215 pushes the movable handle body of the knife handle to move, the jaw is closed, the tong head 2081 is meshed with the tong bar 2083, the gasket 2082 is subjected to single grinding, meanwhile, the limit switch at the front end is conducted to feed back a signal 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 slider drives the push rod fixing seat 214 to move towards the rear end, the jaw is opened, the gasket 2082 finishes single grinding, when the push rod fixing seat 214 drives the limit switch induction sheet 213 to move to the limit switch at the rear end, the rear push rod 210 is far away from one end of the absorbent cotton 203 by pushing the cooling handle 204, the cooling handle 204 is made to rotate relative to the rotating shaft, and further the absorbent cotton 203 is made to contact with the jaw so as to cool the jaw, 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 screw rod 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 the front push rod 215 and the rear push rod 210 for pushing corresponding components and reduce abrasion, the front push rod 215 and the rear push rod 210 are horizontally slidably sleeved with a push rod fixing seat 214, a roller 216 is rotatably mounted at the front end of the front 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 the rear push rod 210 is integrally provided with a round head, and a buffer 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 the test tool 2, specifically, the knife bar assembly 208 is fixed through the knife bar assembly fixing seat 207, the knife handle 217 is fixed through the knife handle 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, and the experimental strength of the experiment is determined according to the parameters. 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 communicated 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 reciprocating driving mechanism 205 drives the push rod fixing seat 214 to horizontally reciprocate, when the limit switch 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 mention 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, 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 various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an experiment frock of supersound sword gasket wear resistance evaluation which characterized in that: the ultrasonic knife test device comprises a control host (1), a test tool (2) and an ultrasonic knife host (3), wherein the test tool comprises a bottom plate (206), a vertical plate (201), a cooling handle (204), a push rod fixing seat (214) and a reciprocating driving mechanism (205) for driving the push rod fixing seat to horizontally reciprocate, a knife bar component fixing seat (207) and a knife handle fixing seat (209) are installed on the vertical plate, the cooling handle is in rotating fit with the vertical plate through a rotating shaft, water absorption cotton (203) is arranged at one end of the cooling handle, and a front push rod (215) and a rear push rod (210) are respectively arranged on the front side and the rear side of the push rod fixing seat;

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);

the front push rod (215) is horizontally slidably sleeved with the push rod fixing seat (214), the front end of the front push rod is rotatably provided with a roller (216) through a pin shaft, and a buffer spring (212) is arranged between the roller and the push rod fixing seat;

the rear push rod (210) is horizontally sleeved with the push rod fixing seat (214) in a sliding mode, a round head is integrally arranged at the rear end of the rear push rod, and a buffer spring is arranged between the round head and the push rod fixing seat.

2. The experimental tool for the abrasion resistance evaluation of the ultrasonic knife pad according to claim 1, 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.

3. The experimental tool for evaluating the wear resistance of the ultrasonic blade pad according to claim 2, characterized in that: the reciprocating driving mechanism (205) is a screw rod driving mechanism, a driving cylinder mechanism or a crank block mechanism.

4. The experimental tool for the ultrasonic blade pad wear resistance evaluation according to claim 3, 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.