Medical catheter punching equipment

Abstract

The invention relates to the technical field of machining, and particularly discloses medical catheter punching equipment which comprises a limiting rod fixedly connected to a machine base. The push cylinder is slidably connected in the machine base; the spring A is fixedly connected between the push cylinder and the machine base; the mounting cylinder is fixedly connected in the machine base and is arranged in the push cylinder; the rotating rod is connected to the mounting cylinder in a sliding and rotating mode, and the rotating rod is matched with the punching die; the guide groove is formed in the rotating rod; the control shaft is fixedly connected in the mounting cylinder and is in sliding fit with the guide groove; the spring B is fixedly connected in the mounting cylinder; and the end part of the spring B is in contact with the rotating rod. The movable rotating rod, the guide groove and the control shaft which convert the moving path of the rotating rod into the rotating path, the linear block, the clamping groove matched with the linear block and the pushing cylinder used for applying acting force are used, rapid mounting and dismounting of the punching die are achieved, and the operation convenience of replacing the punching die is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular discloses a medical catheter punching device. Background Art

[0002] (Extracorporeal membrane oxygenation) is a life support technology that provides oxygenation and circulatory support for patients with cardiopulmonary failure through extracorporeal circulation. The catheter is a key component in the ECMO system, used to draw blood from the patient's body and return it to the body after oxygenation. The ECMO catheter is mainly composed of the cannula body, venous drainage tube, arterial perfusion tube, side hole, guidewire lumen, suture wing / fixation device, and connector. The side hole of the ECMO catheter is the key punching site, and its design and position vary depending on the type and function of the tube. Generally, the cannulas that need to be punched include venous drainage tubes, arterial perfusion tubes, double-lumen cannulas, etc.

[0003] At present, medical catheter punching generally uses punching equipment and punching dies to accurately process holes of the required shape and size on the catheter to meet the needs of different application scenarios. However, different types of cannulas have different punching requirements. In actual production, it is necessary to replace punching dies of different specifications to meet diverse processing needs.

[0004] At present, the common method of fixing punching dies mainly relies on bolt connection or snap connection. However, this fixing method has obvious disadvantages: in order to ensure the stability of the die during high-speed punching, multiple sets of bolts or snaps are usually required for fixing, which makes the disassembly and installation process of the die cumbersome and time-consuming, which not only reduces production efficiency, but also increases the labor intensity of operators. Summary of the invention

[0005] The present invention provides a medical catheter punching device, which aims to solve the defect of the prior art mentioned in the above background technology that the operation is troublesome when installing and disassembling the mold.

[0006] The technical solution is as follows: A medical catheter punching device comprises: a machine base;

[0007] A puncher fixedly connected to the machine base, the puncher consists of a cylinder, a fixing plate and a punching knife;

[0008] The punching die is assembled and fixedly connected to the machine base, and the punching die consists of a main die sleeve, a main die core and a slot;

[0009] It also includes: an upper limit rod fixedly connected to the machine base;

[0010] A push cylinder slidably connected in the machine base;

[0011] A spring A fixedly connected between the push cylinder and the machine base;

[0012] A mounting cylinder fixedly connected to the machine base, the mounting cylinder being arranged in the push cylinder;

[0013] A rotating rod connected to the mounting cylinder is slidably and rotatably engaged with the punching die;

[0014] A guide groove provided on the rotating rod;

[0015] A control shaft fixedly connected in the mounting tube, the control shaft being in sliding cooperation with the guide groove;

[0016] And a spring B is fixedly connected in the mounting cylinder, and the end of the spring B is in contact with the rotating rod.

[0017] Optionally, it further comprises: a block fixedly connected to the rotating rod;

[0018] The card slot is arranged on the punching die, and the slot opening on the main die sleeve is in a straight line shape, and the slot opening of the card slot matches with the straight line block.

[0019] Optionally, it further comprises: a limiting sleeve slidably connected to the machine base, the limiting sleeve is sleeved on the limiting rod, and the limiting sleeve is provided with layers of annular grooves;

[0020] A spring C fixedly connected between the limit sleeve and the base;

[0021] The clamping ring is arranged on the machine base, and the clamping ring moves to be clamped into the ring groove on the limiting sleeve.

[0022] Optionally, it also includes: a mounting frame fixedly connected to the base;

[0023] A moving frame is slidably connected to the mounting frame, and a clamping ring is fixedly connected to the moving frame;

[0024] The control knob connected to the machine base is rotated, the control knob contacts the movable frame, and a protrusion is provided on the control knob;

[0025] A spring D is provided on the moving frame.

[0026] Optionally, it further comprises: a piston plate slidably connected to the punching die, the piston plate being arranged in a slot of the punching die;

[0027] A spring E fixedly connected between the piston plate and the punching die;

[0028] The main mold core is hollow, and a channel is arranged in the punching mold, and the channel connects the space of the slot with the space in the main mold core.

[0029] Optionally, it also includes: a fixing ring fixedly connected to the punching die;

[0030] Rotate the connecting strips connected to the fixed ring, the connecting strips having at least two groups;

[0031] The limiting wheels connected to the ends of the connecting strips are rotated, the limiting wheels will abut against the conduits, and the limiting wheels can be deformed;

[0032] Rotating a rotating ring connected to the punching die;

[0033] A mounting shaft fixedly connected to the rotating ring;

[0034] Each set of connecting bars is provided with connecting grooves, and each mounting shaft is slidably connected to each connecting groove;

[0035] A spring F is fixedly connected between the fixed ring and the rotating ring.

[0036] Optionally, it further comprises: a gear ring fixedly connected to the outside of the rotating ring;

[0037] A rack is fixedly connected to the punching knife of the puncher, and the rack is meshed with the gear ring.

[0038] Optionally, it also includes: a mounting frame fixed on the mounting base;

[0039] A wiping block is slidably connected to the mounting frame, and the wiping blocks are distributed in a ring shape on the mounting frame;

[0040] A spring G is fixedly connected between the mounting frame and the wiping block.

[0041] The beneficial effects are as follows: the present invention uses a movable rotating rod, a guide groove and a control shaft that convert the moving path of the rotating rod into a rotating path, a straight block and a matching card slot, and a push cylinder for applying a force to achieve rapid installation and disassembly of the punching die, thereby improving the operational convenience of replacing the punching die of the present invention.

[0042] The present invention uses a limiting sleeve for limiting the movement of the punching die and a clamping ring for fixing the position of the limiting sleeve, so as to limit the movement of the punching die after it is fixed, prevent the punching die from being unlocked by accident, and improve the use stability of the present invention.

[0043] The present invention uses a movable piston plate to control the airflow, so that the catheter can be easily processed after punching, thereby improving the cleanliness of the catheter after processing and improving the convenience of use of the present invention.

[0044] The present invention uses a rotating limiting wheel to fix the catheter, so that the catheter can be punched stably, improving the punching accuracy of the catheter, and the rotation of the limiting wheel is controlled by the motion trajectory of the puncher when it is used, so as to realize automatic fixation of the catheter and improve the convenience of use of the present invention.

[0045] The present invention uses a wiping block to clean the catheter before and after punching, thereby preventing impurities from affecting the punching accuracy and facilitating the processing of the catheter after punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the structure of the present invention.

[0047] Figure 2 This is a structural separation diagram of the puncher in the present invention.

[0048] Figure 3 This is a diagram showing the positional structure of the punching die and the fixing mechanism in the present invention.

[0049] Figure 4 It is a cross-sectional view of the matching structure of the punching die and the fixing mechanism in the present invention.

[0050] Figure 5 It is a cross-sectional view of the connection structure in which a word block is rotated to a state of being cross-intersected with the card slot in the present invention.

[0051] Figure 6 It is a schematic diagram of the position structure of the limit rod and the locking mechanism in the present invention.

[0052] Figure 7 This is a separation diagram of the connection structure between the limit rod and the locking mechanism in the present invention.

[0053] Figure 8 It is a cross-sectional view of the position structure of the punching die and the cleaning mechanism in the present invention.

[0054] Fig. 9 It is a schematic diagram of the structure when the puncher in the present invention moves to make the gear ring and the rack cooperate.

[0055] Fig.10 It is a structural separation diagram of the limiting mechanism in the present invention.

[0056] Fig.11 It is a schematic diagram of the structure when the limiting mechanism in the present invention limits the catheter.

[0057] Fig.12 It is a schematic diagram of the connection structure of the cleaning mechanism in the present invention.

[0058] Markings in the accompanying drawings: 0-catheter, 1-base, 2-puncher, 201-cylinder, 202-fixed plate, 203-punching knife, 3-punching mold, 301-main mold sleeve, 302-main mold core, 303-slot, 401-push cylinder, 402-spring A, 403-installation cylinder, 404-rotating rod, 405-slot block, 406-slot, 407-gasket, 408-guide groove, 409-control shaft, 410-spring B, 5-limit rod, 601-limit sleeve , 602-spring C, 603-mounting frame, 604-moving frame, 605-retaining ring, 606-control knob, 607-spring D, 701-piston plate, 702-spring E, 703-channel, 801-fixing ring, 802-connecting strip, 803-limiting wheel, 804-rotating ring, 805-mounting shaft, 806-connecting groove, 807-spring F, 808-gear ring, 809-rack, 901-mounting frame, 902-wiping block, 903-spring G. DETAILED DESCRIPTION

[0059] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Embodiment: A medical catheter punching device, see Figure 1-Figure 2 , including: a machine base 1; a puncher 2 fixedly mounted on the machine base 1, four sets of punchers 2 are arranged on the machine base 1, and the puncher 2 includes: a cylinder 201 fixedly mounted on the machine base 1; a fixing plate 202 fixedly mounted on the cylinder 201; a punching knife 203 detachably fixedly mounted on the fixing plate 202, and different punching knives 203 can be replaced according to different punching requirements of different catheters 0.

[0061] See also Figure 1-Figure 2 , including: a punching die 3 detachably fixedly mounted on a machine base 1, the punching die 3 cooperates with a punching knife 203 to punch a conduit 0, the punching die 3 includes: a main die sleeve 301; a main die core 302 fixedly mounted inside the main die sleeve 301, the main die sleeve 301 and the main die core 302 are both provided with holes corresponding to the punching knife 203; a slot 303 is provided between the main die sleeve 301 and the main die core 302 for the conduit 0 to be inserted.

[0062] Insert the catheter 0 into the slot 303 of the punching die 3, start the puncher 2, and the cylinder 201 controls the punching knife 203 to move through the holes on the main die sleeve 301 and the main die core 302 to punch the catheter 0.

[0063] See also Figure 3 , Figure 4 and Figure 5, and also includes: a limit rod 5 fixedly installed on the front side of the machine base 1, the limit rod 5 is inserted into the punching die 3 and is used to limit the position of the punching die 3 installed on the machine base 1; a fixing mechanism arranged on the machine base 1, the fixing mechanism is used to detachably fix the punching die 3 on the machine base 1, and the fixing mechanism sets the punching die 3 between the four groups of punchers 2, and the fixing mechanism includes: a push cylinder 401 slidably installed in the machine base 1; a spring A402 fixedly installed between the push cylinder 401 and the machine base 1; a mounting cylinder 403 fixedly installed in the machine base 1, and the mounting cylinder 403 is arranged in the push cylinder 401; a rotating rod 404 slidably and rotatably installed on the mounting cylinder 403; a one-shaped block 405 fixedly installed at the front end of the rotating rod 404; a card slot 406 arranged at the rear of the main mold sleeve 301, and the card slot 406 is at the main The notch on the die sleeve 301 is in the shape of a straight line, and the card slot 406 cooperates with the notch of the straight-line block 405. The function conversion of connecting with the punching die 3 and unlocking the connection is performed by rotating the rotating rod 404; a gasket 407 is fixedly installed at the front end of the rotating rod 404, and the gasket 407 is located behind the straight-line block 405. The distance between the gasket 407 and the straight-line block 405 is the thickness of the notch of the card slot 406; a guide groove 408 is arranged at the rear end of the rotating rod 404; a control shaft 409 is fixedly installed in the mounting tube 403, and the control shaft 409 is slidably matched with the guide groove 408. Under the cooperation of the control shaft 409 and the guide groove 408, the rotating rod 404 will also be controlled to rotate when moving forward and backward; a spring B410 is fixedly installed in the mounting tube 403, and the end of the spring B410 is in contact with the rotating rod 404.

[0064] When installing the punching die 3, the punching die 3 is moved backward and inserted into the limit rod 5. The punching die 3 first contacts the push cylinder 401 and pushes the push cylinder 401 backward, and the spring A402 is compressed. Then, the one-shaped block 405 passes through the notch of the card slot 406 and extends into the card slot 406, and moves the rotating rod 404 backward through the gasket 407, and the spring B410 is compressed. During this process, the control shaft 409 cooperates with the guide groove 408 to control the rotation of the rotating rod 404, and staggers the one-shaped block 405 and the one-shaped notch of the card slot 406, so that the punching die 3 cannot be separated from the rotating rod 404 and the connection is achieved;

[0065] After completion, the punching die 3 is released, and the spring A402 and the spring B410 resume their deformation. Since the distance the push cylinder 401 is moved is greater than the distance the rotating rod 404 is moved, after the rotating rod 404 is reset, the spring A402 is still in a compressed state, so that the push cylinder 401 still has a tendency to move forward, that is, the push cylinder 401 applies a forward force to the punching die 3, and under the limiting action of the control shaft 409 and the guide groove 408, and the fixing action of the one-shaped block 405 and the card slot 406 on the punching die 3, the punching die 3 cannot move forward. Therefore, the rotating rod 404 cooperates with the push cylinder 401 to stably fix the punching die 3 on the machine base 1.

[0066] When removing the punching die 3, the punching die 3 is moved backward, and the rotating rod 404 is controlled to rotate again, so that the straight block 405 rotates to overlap with the slot 406, and then the punching die 3 is moved forward to remove the punching die 3 from the rotating rod 404. The spring A402 and the spring B410 reset the push cylinder 401 and the rotating rod 404 respectively. Therefore, the use of the fixing mechanism can quickly and conveniently disassemble and assemble the punching die 3.

[0067] See also Figure 1 , Figure 6 and Figure 7 , and further includes: a locking mechanism arranged on the machine base 1, the locking mechanism is used to lock the punching die 3 to prevent the punching die 3 from being accidentally unlocked and fixed by the fixing mechanism, the locking mechanism includes: a limit sleeve 601 slidably mounted on the machine base 1, the limit sleeve 601 is sleeved on the limit rod 5, when the punching die 3 passes through the limit rod 5 and moves backward, it will contact the limit sleeve 601, and the limit sleeve 601 is provided with layers of ring grooves; a spring C602 fixedly mounted between the limit sleeve 601 and the machine base 1; a mounting frame 603 fixedly mounted on the machine base 1; a sliding Two movable frames 604 are installed on the installation frame 603; snap rings 605 are fixedly installed on the two movable frames 604, and the two snap rings 605 are inserted into the ring grooves on the limit sleeve 601 to limit the front and rear positions of the limit sleeve 601; a control knob 606 is rotatably installed on the machine base 1, and the control knob 606 is set between the two movable frames 604. A protrusion is set on the control knob 606. The control knob 606 is rotated to control the movable frames 604 and the snap rings 605 to separate from each other; a spring D607 is fixedly installed between the two movable frames 604.

[0068] When installing the punching die 3, first rotate the control knob 606 90 degrees, and its protrusion squeezes the two moving frames 604 apart and controls the snap ring 605 to separate, thereby unlocking the limit sleeve 601; then control the punching die 3 to move backward on the limit rod 5, the limit sleeve 601 is pushed to move backward, and the spring C602 is compressed; when the punching die 3 is fixed, reverse the control knob 606, and the spring D607 controls the two moving frames 604 to move closer, thereby clamping the snap ring 605 into the annular groove on the limit sleeve 601, fixing the front and rear positions of the limit sleeve 601. Therefore, when the punching die 3 is accidentally pushed, the punching die 3 cannot move backward, that is, it cannot unlock the fixing mechanism, thereby realizing the anti-accidental touch function.

[0069] See also Figure 8 , and also includes: a cleaning mechanism arranged in the punching die 3, the cleaning mechanism is used to clean the waste and debris remaining in the catheter 0 after punching, the cleaning mechanism includes: a piston plate 701 slidably installed in the slot 303; a spring E702 fixedly installed between the piston plate 701 and the main mold sleeve 301; the main mold core 302 is hollow, and a channel 703 is arranged in the main mold sleeve 301, and the channel 703 connects the space of the slot 303 with the space in the main mold core 302.

[0070] After punching is completed, the conduit 0 is pressed backward, and the piston plate 701 blows the gas between it and the main mold sleeve 301 to the center of the main mold core 302 through the channel 703, blowing the waste and debris generated during punching out of the conduit 0, thereby achieving the purpose of cleaning the conduit 0.

[0071] See also Figure 1 , Fig. 9 , Fig.10 and Fig.11, further comprising: a limiting mechanism disposed between the puncher 2 and the punching die 3, the limiting mechanism being used to limit the position of the catheter 0 on the punching die 3, so that the catheter 0 can be stably punched and the punching accuracy is ensured, the limiting mechanism comprising: a fixing ring 801 fixedly mounted on the front side of the main die sleeve 301; a connecting strip 802 rotatably mounted on the fixing ring 801, the connecting strip 802 being provided with four groups; a limiting wheel 803 rotatably mounted at the end of each connecting strip 802, the connecting strip 802 rotating will cause the limiting wheel 803 to abut against the catheter 0, and the limiting wheel 803 can be deformed; a rotating ring 80 rotatably mounted on the punching die 3 4; a mounting shaft 805 fixedly mounted on the rotating ring 804, wherein four mounting shafts 805 are provided; a connecting groove 806 is provided on each group of connecting strips 802, wherein each mounting shaft 805 is slidably connected with each connecting groove 806, and when the rotating ring 804 rotates relative to the fixed ring 801, the rotation of the connecting strips 802 is controlled by the cooperation between the mounting shaft 805 and the connecting groove 806; a spring F807 fixedly mounted between the fixed ring 801 and the rotating ring 804; a gear ring 808 fixedly mounted outside the rotating ring 804; a rack 809 fixedly mounted on the punching knife 203, wherein the rack 809 is meshed with the gear ring 808.

[0072] For the punching knife 203 and the punching die 3 that cooperate with each other in the same group, the rack 809 on the punching knife 203 and the gear ring 808 on the punching die 3 also cooperate with each other. Therefore, only one set of limiting mechanisms needs to be set on the punching knife 203 and the punching die 3 in the same group.

[0073] After the catheter 0 is inserted into the punching die 3, when the puncher 2 is started to punch the catheter 0, the punching knife 203 moves toward the direction of the punching die 3. First, the gear ring 808 is controlled to move through the rack 809 to control the rotation of the rotating ring 804 relative to the fixed ring 801, the spring F807 is compressed, and the connecting strip 802 is controlled to rotate so that the limiting wheels 803 on each group of rotating rings 804 are pressed against the catheter 0, thereby limiting the catheter 0. Subsequently, the punching knife 203 continues to move to punch the catheter 0, and the limiting wheel 803 is squeezed and deformed, so that the catheter 0 can be punched stably. After the puncher 2 completes the punching, the rack 809 moves in the opposite direction, controls the rotating ring 804 to reverse and reset, and controls the limiting wheel 803 to reset, that is, the limiting component is automatically released.

[0074] The spring F807 is provided to maintain the initial position between the rotating ring 804 and the fixed ring 801, so as to ensure that the conduit 0 can be accurately fixed after the rack 809 controls the limiting wheel 803 to rotate.

[0075] See also Figure 1 and Fig.12, and also includes: a cleaning mechanism arranged on the machine base 1, the cleaning mechanism is used to clean the catheter 0, the cleaning mechanism is arranged on the front side of the punching die 3, and the cleaning mechanism includes: a mounting frame 901 fixedly mounted on the machine base 1, the mounting frame 901 consists of two parts, a supporting part and a mounting part, and the two parts can be detachably assembled together; a wiping block 902 slidably mounted on the mounting frame 901, and the wiping block 902 is annularly distributed on the mounting frame 901; a spring G903 fixedly mounted between the mounting frame 901 and the wiping block 902.

[0076] Before inserting the catheter 0 onto the punching die 3, the catheter 0 is first passed through the wiping block 902. During the movement of the catheter 0 relative to the wiping block 902, the wiping block 902 can clean the outer surface of the catheter 0. Cleaning the catheter 0 before punching can prevent impurities from affecting the punching accuracy, and cleaning the catheter 0 after punching can handle the residual debris on the outer surface of the catheter 0 so that the catheter 0 can be subsequently processed. When the punching die 3 needs to be replaced, the mounting portion of the mounting frame 901 is removed from the supporting portion and removed from the front side of the punching die 3, so that the punching die 3 can be replaced on the spot.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A medical catheter punching device, comprising: Machine base (1); A puncher (2) fixedly connected to the machine base (1), the puncher (2) comprising a cylinder (201), a fixing plate (202) and a punching knife (203); A punching die (3) is assembled and fixedly connected to the machine base (1), the punching die (3) cooperates with the puncher (2) to punch holes in the catheter (0), and the punching die (3) is composed of a main die sleeve (301), a main die core (302) and a slot (303); The invention is characterized in that it further comprises: a limiting rod (5) fixedly connected to the machine base (1) for limiting the position of the punching die (3); A push cylinder (401) slidably connected to the machine base (1); A spring A (402) fixedly connected between the push cylinder (401) and the machine base (1); A mounting cylinder (403) fixedly connected to the machine base (1), wherein the mounting cylinder (403) is arranged in the push cylinder (401); A rotating rod (404) is slidably and rotationally connected to the mounting cylinder (403), the rotating rod (404) cooperates with the punching die (3), and the function conversion of connecting with the punching die (3) and unlocking the connection is performed through the rotation of the rotating rod (404); A guide groove (408) disposed on the rotating rod (404); A control shaft (409) is fixedly connected to the installation tube (403), and the control shaft (409) is slidably matched with the guide groove (408), and the rotation of the rotating rod (404) is controlled by the matching of the control shaft (409) and the guide groove (408); and a spring B (410) is fixedly connected to the installation tube (403), and the end of the spring B (410) is in contact with the rotating rod (404).

2. A medical catheter punching device according to claim 1, characterized in that: Also includes: A block (405) fixedly connected to the rotating rod (404); And a clamping slot (406) is arranged on the punching die (3), the notch of the clamping slot (406) on the main die sleeve (301) is in the shape of a straight line, and the notch of the clamping slot (406) cooperates with the straight line block (405) to enable the rotating rod (404) to connect with the punching die (3) and unlock the connection function conversion.

3. A medical catheter punching device according to claim 2, characterized in that: Also includes: A limiting sleeve (601) is slidably connected to the machine base (1), the limiting sleeve (601) is sleeved on the limiting rod (5), and the limiting sleeve (601) is provided with layers of annular grooves; A spring C (602) fixedly connected between the limiting sleeve (601) and the base (1); And a snap ring (605) is arranged on the machine base (1), and the snap ring (605) moves to snap into the ring groove on the limiting sleeve (601) to limit the position of the limiting sleeve (601).

4. A medical catheter punching device according to claim 3, characterized in that: Also includes: A mounting frame (603) fixedly connected to the machine base (1); A movable frame (604) is slidably connected to the mounting frame (603), and a snap ring (605) is fixedly connected to the movable frame (604); The control knob (606) connected to the machine base (1) is rotated, and the control knob (606) contacts the movable frame (604). A protrusion is provided on the control knob (606). The control knob (606) is rotated to control the movable frame (604) and the clamping ring (605) to move; And a spring D (607) is arranged on the moving frame (604).

5. A medical catheter punching device according to claim 4, characterized in that: Also includes: A piston plate (701) slidably connected to the punching die (3), wherein the piston plate (701) is disposed in a slot (303) of the punching die (3); and a spring E (702) fixedly connected between the piston plate (701) and the punching die (3); The main mold core (302) is hollow, and a channel (703) is provided in the punching die (3), and the channel (703) communicates the space of the slot (303) with the space in the main mold core (302).

6. A medical catheter punching device according to claim 5, characterized in that: Also includes: A fixing ring (801) fixedly connected to the punching die (3); The connecting strips (802) are rotatably connected to the fixing ring (801), and the connecting strips (802) are at least two groups; The limiting wheel (803) connected to the end of each connecting strip (802) is rotated, and the limiting wheel (803) will abut against the conduit (0), and the limiting wheel (803) can be deformed; Rotating a rotating ring (804) connected to the punching die (3); A mounting shaft (805) fixedly connected to the rotating ring (804); Each group of connecting bars (802) is provided with a connecting groove (806), and each mounting shaft (805) is slidably connected to each connecting groove (806); A spring F (807) is fixedly connected between the fixed ring (801) and the rotating ring (804).

7. A medical catheter punching device according to claim 6, characterized in that: Also includes: A gear ring (808) fixedly connected to the outside of the rotating ring (804); And a rack (809) fixedly connected to the punching knife (203) of the punching device (2), the rack (809) meshing with the gear ring (808).

8. A medical catheter punching device according to claim 7, characterized in that: Also includes: A mounting frame (901) is fixedly mounted on the machine base (1); A wiping block (902) slidably connected to the mounting frame (901), the wiping block (902) being distributed in a ring shape on the mounting frame (901); and a spring G (903) fixedly connected between the mounting frame (901) and the wiping block (902).

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