Puncture needle fatigue tester

Abstract

The utility model provides a puncture needle fatigue tester, and the tester comprises a pedestal which is provided with an operation screen; the mechanical arm is fixedly installed on the base and comprises a sliding block used for driving the puncture needle to ascend and descend in a reciprocating mode. The puncture needle is mounted on the sliding block; the conveying mechanism is located below the sliding block, comprises a driving roller and is used for conveying the adhesive tape; the conveying direction of the driving roller is perpendicular to the lifting direction of the puncture needle; the control module is located in the operation screen and comprises a PLC electrically connected with the operation screen. The PLC is further electrically connected with the mechanical arm and the conveying mechanism and used for controlling driving of the sliding blocks and the driving rollers. The puncture needle is mounted on the sliding block, so that the reciprocating lifting action of the sliding block can be effectively utilized to realize the puncture action of the puncture needle; the conveying mechanism can automatically convey the adhesive tape to the position below the puncture needle, and then a real puncture environment is simulated; meanwhile, the conveying mechanism can convey and change positions of the adhesive tape after puncture is completed, so that each puncture of the puncture needle is real puncture, and the test accuracy is effectively ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection equipment, and particularly relates to a puncture needle fatigue tester. BACKGROUND

[0002] In the field of medical detection equipment, puncture needles as key materials, their service life is an important indicator for evaluating product performance. At present, most production and manufacturing enterprises and third-party detection institutions have significant technical bottlenecks in puncture needle life detection. The traditional detection method mainly relies on theoretical value inference or market feedback, and lacks the simulation capability of the actual use scene of the puncture needle, which leads to insufficient accuracy of the detection result and is difficult to meet the demand of the medical industry for high-precision detection equipment.

[0003] The existing technology has the following outstanding problems:

[0004] The detection method is not professional: the traditional detection method cannot simulate the reciprocating puncture action of the puncture needle in actual use, which leads to a large deviation between the detection result and the actual life.

[0005] Low efficiency: manual detection or simple mechanical testing cannot realize long-time and high-frequency cycle testing, which is difficult to meet the detection needs of batch production.

[0006] Poor data reliability: the passive detection method relying on market feedback cannot timely find potential defects of products, which may lead to unqualified products flowing into the market and affecting patient safety.

[0007] Therefore, the above problems need to be solved urgently. SUMMARY

[0008] In view of the above defects or deficiencies in the prior art, it is expected to provide a puncture needle fatigue tester.

[0009] The present application provides a puncture needle fatigue tester, comprising

[0010] a base, wherein an operation screen is arranged on the base for control and data display;

[0011] a mechanical arm, wherein the mechanical arm is fixedly installed on the base and comprises a sliding block for driving the puncture needle to reciprocate and lift;

[0012] the puncture needle is detachably installed on the sliding block;

[0013] a conveying mechanism, wherein the conveying mechanism is located below the sliding block and comprises a driving roller for conveying a rubber strip to below the puncture needle;

[0014] the conveying direction of the driving roller is perpendicular to the lifting direction of the puncture needle;

[0015] A control module is arranged in the operation screen and comprises a PLC controller electrically connected to the operation screen.

[0016] The PLC controller is further electrically connected to the mechanical arm and the conveying mechanism for controlling the driving of the sliding block and the driving roller.

[0017] Further,

[0018] The base is connected with the mechanical arm through a mounting bracket;

[0019] The mounting bracket is fixedly installed on the base, and a mounting plate for mounting the mechanical arm is arranged at the middle of the mounting bracket;

[0020] The mechanical arm is fixedly installed on the mounting plate and comprises a back plate for mounting the sliding block.

[0021] Further,

[0022] The back plate extends in the vertical direction, and end plates are vertically arranged at both ends of the back plate;

[0023] The two end plates are parallel to each other and are provided with parallel sliding rods therebetween;

[0024] The sliding block is provided with matching through holes corresponding to the two sliding rods, and is in sliding connection with the sliding rods.

[0025] Further,

[0026] The sliding block is driven by a servo motor;

[0027] The servo motor is installed on the upper end plate and is connected with the sliding block through a lead screw;

[0028] The sliding block is provided with a matching threaded hole corresponding to the lead screw at the middle of the sliding block.

[0029] Further,

[0030] The sliding block is connected with the puncture needle through a mounting seat;

[0031] The puncture needle is provided with a clamping portion for limiting installation at the middle of the puncture needle;

[0032] The mounting seat comprises a seat body fixedly installed on the sliding block;

[0033] A matching pressing block is installed on the side of the seat body away from the sliding block through a bolt;

[0034] The pressing block and the seat body are provided with matching clamping grooves corresponding to the clamping portion on the side close to each other.

[0035] Further,

[0036] The base is connected with the driving rollers through a substrate;

[0037] The substrate is vertically installed on the base;

[0038] The number of the driving rollers includes four, which are located on the same side of the substrate and are rotationally connected with the substrate;

[0039] The four driving rollers are arranged in a rectangular shape, two driving rollers arranged in an upper and lower group are used for clamping and conveying the adhesive tape;

[0040] The two groups of driving rollers are located on the two sides of the puncture needle respectively, and are used for guiding the adhesive tape.

[0041] Further,

[0042] The base is further provided with a guide block;

[0043] The guide block is located between the two groups of driving rollers, and a matching guide hole is provided at the top of the guide block corresponding to the puncture needle, and a horizontal through hole is provided at the middle of the guide block corresponding to the adhesive tape;

[0044] The through hole and the guide hole are perpendicular and connected.

[0045] Further,

[0046] The base is connected with the operation screen through the mounting bracket;

[0047] The operation screen is fixedly installed on the top of the mounting bracket.

[0048] The application has the advantages and positive effects that:

[0049] The puncture needle is installed on the sliding block, which can effectively utilize the reciprocating lifting action of the sliding block to realize the puncture action of the puncture needle; the conveying mechanism can automatically convey the adhesive tape to the lower side of the puncture needle, thereby simulating a real puncture environment; at the same time, the conveying mechanism can also convey and change the position of the adhesive tape after the puncture is completed, so that each puncture of the puncture needle is a real puncture, which effectively ensures the accuracy of the test. BRIEF DESCRIPTION OF DRAWINGS

[0050] Fig. 1 The structure schematic view of the puncture needle fatigue tester provided by the embodiment of the application;

[0051] Fig. 2 The structure schematic view of the puncture needle of the puncture needle fatigue tester provided by the embodiment of the application.

[0052] The text annotations in the figure are as follows: 100-base; 110-mounting bracket; 111-mounting plate; 120-guide block; 200-sliding block; 210-back plate; 211-end plate; 220-sliding rod; 230-servo motor; 231-screw rod; 240-seat body; 241-pressing block; 300-piercing needle; 400-driving roller; 410-base plate; 500-adhesive tape; 600-PLC controller. DETAILED DESCRIPTION

[0053] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be described in detail below with reference to the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application.

[0054] Please refer to Figs. 1-2 The embodiment provides a piercing needle fatigue tester, which comprises a base 100, wherein the base 100 is provided with an operation screen for control and data display; a mechanical arm fixedly installed on the base 100 and comprising a sliding block 200 for driving a piercing needle 300 to reciprocatingly ascend and descend; the piercing needle 300 is detachably installed on the sliding block 200; a conveying mechanism located below the sliding block 200 and comprising a driving roller 400 for conveying an adhesive tape 500 to below the piercing needle 300; the conveying direction of the driving roller 400 is perpendicular to the ascending and descending direction of the piercing needle 300; a control module located in the operation screen and comprising a PLC controller 600 electrically connected with the operation screen; the PLC controller 600 is also electrically connected with the mechanical arm and the conveying mechanism for controlling the driving of the sliding block 200 and the driving roller 400.

[0055] In the embodiment, the base 100 is made of high-strength aluminum alloy material, which not only ensures the firmness of the base and can stably support the entire equipment, but also has certain lightweight characteristics, facilitating the carrying and moving of the equipment; four height-adjustable foundation bolts are arranged at the bottom of the base 100, and by adjusting the foundation bolts, the equipment can be kept horizontal on different working planes, ensuring the stability and accuracy of the test process.

[0056] In the embodiment, the operation screen is installed at the top of the mounting bracket 110 and adopts a 7-inch color touch display screen, which has a simple and intuitive interface; an operator can conveniently set test parameters, such as the ascending and descending frequency of the piercing needle 300, the conveying speed of the driving roller 400, the test cycle number, etc., through the operation screen; the operation screen can also display real-time test progress, the working state of the piercing needle 300 and the conveying condition of the adhesive tape 500 and other information; for example, when the test is half completed, the operation screen will display the completed test progress in the form of percentage.

[0057] In a preferred embodiment, the base 100 is connected with the mechanical arm through a mounting frame 110; the mounting frame 110 is fixedly installed on the base 100, and an installation plate 111 for installing the mechanical arm is arranged at the middle part of the mounting frame 110; the mechanical arm is fixedly installed on the installation plate 111, and includes a back plate 210 for installing the sliding block 200.

[0058] In the embodiment, the mechanical arm is fixed on the base 100 through the mounting frame 110; the mounting frame 110 is a structural frame, which is connected with the base 100 through high-strength bolts, so as to ensure the stability of the connection.

[0059] In a preferred embodiment, the back plate 210 extends in the vertical direction, and two end plates 211 are vertically installed at two ends of the back plate 210 respectively; the two end plates 211 are parallel to each other, and a sliding rod 220 parallel to the two end plates 211 is arranged between the two end plates 211; the sliding block 200 is provided with matching through holes corresponding to the two sliding rods 220 respectively, and is in sliding connection with the sliding rods 220.

[0060] In the embodiment, the back plate 210 extends in the vertical direction, and is made of stainless steel, which has good corrosion resistance; the end plates 211 vertically installed at two ends of the back plate 210 are also made of stainless steel; the sliding rods 220 are chrome-plated light shafts, which have smooth surfaces and good wear resistance; the through holes in the sliding block 200 are provided with linear bearings, which cooperate with the sliding rods 220, so that the sliding block 200 slides on the sliding rods 220 more smoothly, reduces the friction resistance, and improves the motion accuracy of the mechanical arm.

[0061] In a preferred embodiment, the sliding block 200 is driven by a servo motor 230; the servo motor 230 is installed on the upper end plate 211, and is connected with the sliding block 200 through a lead screw 231; the middle part of the sliding block 200 is provided with a matching threaded hole corresponding to the lead screw 231.

[0062] In the embodiment, the sliding block 200 is driven by the servo motor 230, and the servo motor 230 is selected to have high torque and high precision characteristics; the lead screw 231 is a ball screw, which has high transmission efficiency and high positioning accuracy; in the actual operation process, the servo motor 230 accurately controls the rotation angle and speed of the lead screw 231 according to the instructions issued by the PLC controller 600, so as to realize accurate control of the lifting motion of the sliding block 200; for example, when high-precision puncture testing is performed, the PLC controller 600 can control the servo motor 230 to make the sliding block 200 lift with a very small displacement increment, so as to ensure that the position error of the puncture needle 300 in each puncture is within a very small range.

[0063] In a preferred embodiment, the sliding block 200 is connected with the puncture needle 300 through a mounting base; the middle of the puncture needle 300 is provided with a clamping part for installation limiting; the mounting base comprises a seat body 240 fixedly installed on the sliding block 200; the side of the seat body 240 away from the sliding block 200 is provided with a matched pressing block 241 installed through a bolt; the side of the pressing block 241 and the seat body 240 close to each other is provided with a matched clamping groove corresponding to the clamping part.

[0064] In the embodiment, the clamping part of the puncture needle 300 is in the shape of an I-beam, and the seat body 240 and the pressing block 241 are made of high-strength engineering plastic. This material has certain toughness, which can prevent damage to the puncture needle 300 during installation, and has sufficient strength to ensure stable clamping of the puncture needle 300 during testing. When installing the puncture needle 300, first align the clamping part of the puncture needle 300 with the clamping groove on the seat body 240, then align the clamping groove on the pressing block 241 with the clamping part, and finally fix the pressing block 241 on the seat body 240 through a bolt. During the process of tightening the bolt, the clamping grooves of the pressing block 241 and the seat body 240 gradually clamp the clamping part of the puncture needle 300, achieving reliable installation limiting.

[0065] In a preferred embodiment, the base 100 is connected with the driving roller 400 through a base plate 410; the base plate 410 is vertically installed on the base 100; the number of the driving roller 400 includes four, which are located on the same side of the base plate 410 and are rotationally connected with the base plate 410; the four driving rollers 400 are arranged in a rectangular shape, two driving rollers 400 arranged in an upper and lower group for clamping and conveying the adhesive tape 500; two groups of driving rollers 400 are located on both sides of the puncture needle 300 for guiding the adhesive tape 500.

[0066] In the embodiment, the base plate 410 of the conveying mechanism is vertically installed on the base 100 and is made of a cold-rolled steel plate with a thickness of 5 mm, which ensures sufficient strength; one of the driving rollers 400 is driven by an independent stepping motor, and the stepping motor is electrically connected with the PLC controller 600; during testing, the PLC controller 600 controls the operation of the driving motor according to the set parameters, so that the adhesive tape 500 can move a certain distance forward after each puncture action.

[0067] In a preferred embodiment, the base 100 is further provided with a guide block 120; the guide block 120 is located between the two groups of driving rollers 400, the top of the guide block 120 is provided with a matched guide hole corresponding to the puncture needle 300, and the middle of the guide block 120 is provided with a horizontal through hole corresponding to the adhesive tape 500; the through hole is perpendicular to and communicates with the guide hole.

[0068] In this embodiment, the guide block 120 is made of brass, which has good wear resistance and self-lubricating property; the guide hole at the top of the guide block 120 has a diameter slightly larger than the outer diameter of the puncture needle 300, and the gap between the two can ensure the smooth passing of the puncture needle 300 and also play a certain guiding role on the puncture needle 300, preventing the puncture needle 300 from deviating during puncture; the through hole in the middle has a width slightly larger than the width of the rubber strip 500, ensuring that the rubber strip 500 can pass through smoothly during conveying, and also playing a limiting role on the rubber strip 500 in the transverse direction, so that the rubber strip 500 always remains in the correct conveying position.

[0069] In a preferred embodiment, the base 100 is connected to the operation screen through the mounting frame 110; the operation screen is fixedly installed at the top of the mounting frame 110.

[0070] In a preferred embodiment, in order to further improve the accuracy and reliability of the test, a pressure sensor can be installed on the puncture needle 300, and the pressure sensor is electrically connected to the PLC controller 600; during puncture, the pressure sensor collects the pressure data of the puncture needle 300 in real time and transmits the data to the PLC controller 600; the PLC controller 600 analyzes and processes these data, and when the pressure data exceeds the set normal range, an alarm signal is sent to prompt the operator that there may be problems such as wear of the puncture needle 300 or uneven material of the rubber strip 500.

[0071] The principles and implementation modes of the present application are described by applying specific examples in this paper, and the above examples are only used to help understand the method and its core idea. The above description is only the preferred embodiment of the present application, and it should be pointed out that due to the limitation of language expression, there are infinite specific structures, and for ordinary technical personnel in this technical field, some improvements, decorations or changes can be made without departing from the principles of the present application, and the above technical features can also be combined in an appropriate way; these improvements, decorations, changes or combinations, or the direct application of the inventive concept and technical scheme to other occasions without improvement, should be regarded as the protection scope of the present application.

Claims

1. A puncture needle fatigue testing instrument, characterized in that, include A base (100) is provided with an operation screen for operation and data display; A robotic arm, which is fixedly mounted on the base (100), includes a slider (200) for driving the puncture needle (300) to reciprocate up and down; The puncture needle (300) is detachably mounted on the slider (200); A conveying mechanism, located below the slider (200), includes a drive roller (400) for conveying the rubber strip (500) to below the puncture needle (300); The conveying direction of the drive roller (400) is perpendicular to the lifting direction of the puncture needle (300); The control module is located inside the operation panel and includes a PLC controller (600) electrically connected to the operation panel. The PLC controller (600) is also electrically connected to the robotic arm and conveying mechanism for controlling the drive of the slider (200) and the drive roller (400).

2. The puncture needle fatigue tester according to claim 1, characterized in that, The base (100) is connected to the robotic arm via a mounting bracket (110); The mounting bracket (110) is fixedly mounted on the base (100), and a mounting plate (111) for mounting the robotic arm is provided in the middle. The robotic arm is fixedly mounted on the mounting plate (111), including a back plate (210) for mounting the slider (200).

3. The puncture needle fatigue tester according to claim 2, characterized in that, The back plate (210) extends vertically, and end plates (211) are respectively installed vertically at both ends. The two end plates (211) are parallel to each other, and there are parallel sliding rods (220) between them. The slider (200) is provided with matching through holes corresponding to the two sliders (220), and is slidably connected to the sliders (220).

4. The puncture needle fatigue tester according to claim 3, characterized in that, The slider (200) is driven by a servo motor (230); The servo motor (230) is mounted on the end plate (211) located above, and is connected to the slider (200) via a lead screw (231); The slider (200) has a matching threaded hole at the middle corresponding to the lead screw (231).

5. The puncture needle fatigue tester according to claim 1, characterized in that, The slider (200) and the puncture needle (300) are connected by a mounting base; The puncture needle (300) has a locking part for installation and limiting at the middle; The mounting base includes a seat (240) that is fixedly mounted on the slider (200); A matching pressure block (241) is bolted to the side of the seat (240) away from the slider (200). The pressure block (241) and the seat (240) are provided with matching snap-fit ​​grooves on the side of the snap-fit ​​part that are close to each other.

6. The puncture needle fatigue tester according to claim 1, characterized in that, The base (100) and the drive roller (400) are connected by a base plate (410); The substrate (410) is vertically mounted on the base (100); The number of drive rollers (400) includes four, which are located on the same side of the substrate (410) and are rotatably connected to the substrate (410). The four drive rollers (400) are arranged in a rectangular pattern, with two drive rollers (400) arranged vertically as a group, for clamping and conveying the rubber strip (500); The two sets of drive rollers (400) are located on both sides of the puncture needle (300) and are used to guide the adhesive strip (500).

7. The puncture needle fatigue tester according to claim 6, characterized in that, The base (100) is also provided with a guide block (120); The guide block (120) is located between the two sets of drive rollers (400), with a matching guide hole at the top corresponding to the puncture needle (300) and a horizontally extending through hole at the middle corresponding to the rubber strip (500). The through hole and the guide hole are perpendicular to each other and connected.

8. The puncture needle fatigue tester according to claim 2, characterized in that, The base (100) and the operation screen are connected by the mounting bracket (110); The operation screen is fixedly installed on the top of the mounting bracket (110).

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