Medical catheter mandrel stretching mechanism

Abstract

The utility model discloses a medical catheter mandrel stretching mechanism which comprises a fixed end clamp, a movable end clamp, a clamp adjusting device and a shearing and rounding mechanism. The fixed end clamp and the movable end clamp are oppositely arranged, the movable end clamp is arranged on the clamp adjusting device, and the distance between the movable end clamp and the fixed end clamp can be changed through adjustment of the clamp adjusting device; the shearing and rounding mechanism is arranged on the upstream of a clamping opening of the movable end clamp, and the shearing and rounding mechanism is also arranged on the clamp adjusting device and synchronously moves along with the movable end clamp. The inner core shaft in the medical catheter is automatically stretched, so that the core shaft is separated from the inner wall of the catheter, the production efficiency is effectively improved, the manpower demand is reduced, and the manpower cost is reduced; and secondly, shearing of the mandrel and round corner repairing of the end opening are achieved, and the problem that the inner wall of the guide pipe is scratched due to burrs at a fracture in subsequent core pulling is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical catheter core extraction, and in particular relates to a medical catheter core shaft stretching mechanism. Background Art

[0002] Medical catheters are tubular devices typically made of flexible polymer materials. During the manufacturing process, a rigid mandrel is used for guidance and support to ensure the catheter's shape, size, and performance meet medical requirements. However, during the manufacturing process, the mandrel often adheres to the catheter's inner wall due to heat. When the catheter is finished mid-process, the mandrel must be removed to allow for subsequent processing.

[0003] The traditional core pulling method mainly uses manual core pulling. When pulling the core, the two ends of the core shaft are manually pulled to separate the core shaft from the inner wall of the catheter, and then the core shaft is pulled out from one end of the catheter. This method of manually stretching and separating the core shaft from the catheter requires two workers to work together, which is time-consuming and labor-intensive. In order to improve production efficiency, a large amount of manpower is required, resulting in high labor costs. At the same time, during the long production process, workers may even suffer arm strains, affecting their physical health. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model aims to provide a medical catheter core shaft stretching mechanism to automatically stretch the core shaft inside the medical catheter, so that the core shaft is separated from the inner wall of the catheter, thereby improving production efficiency and reducing labor costs.

[0005] In order to achieve the above technical objectives and effects, the present invention is implemented through the following technical solutions:

[0006] A medical catheter core shaft stretching mechanism includes a fixed end clamp, a movable end clamp, a clamp adjustment device and a shearing and rounding mechanism; the fixed end clamp and the movable end clamp are arranged relative to each other, and the movable end clamp is arranged on the clamp adjustment device. The movable end clamp can change the distance between the fixed end clamp and the clamp by adjusting the clamp adjustment device; the shearing and rounding mechanism is arranged upstream of the clamping mouth of the movable end clamp, and the shearing and rounding mechanism is also arranged on the clamp adjustment device and moves synchronously with the movable end clamp.

[0007] Furthermore, the fixed end clamp and the movable end clamp each include a support frame and a pneumatic wedge clamp provided on the support frame.

[0008] Furthermore, the fixed end clamp and the movable end clamp each include a position sensor for monitoring whether the medical catheter is in place.

[0009] Furthermore, a tension sensor for real-time monitoring of the tension is provided on the movable end clamp.

[0010] Furthermore, the clamp adjustment device includes a pair of linear guide rails, a movable plate is provided on the slide of the pair of linear guide rails, a fixed plate is provided on the lower end surface of the movable plate through a fixed shaft, a vertically upward driving motor is provided on the fixed plate, a gear is sleeved on the output shaft of the driving motor, the gear is meshed with a rack, and the direction in which the rack is set is parallel to the setting direction of the pair of linear guide rails.

[0011] Furthermore, the gear and the rack are connected by helical tooth meshing.

[0012] Furthermore, the shearing and rounding mechanism consists of a stretching scissors component and a smoothing processing component.

[0013] Furthermore, the stretching scissors assembly includes a scissors module, wherein a connecting seat is respectively provided on a pair of side walls of the scissors module, and the lower ends of the connecting seats are respectively provided on a lifting plate through two groups of support rods, and a pair of guide rods are passed through the lifting plate through linear bearings, and the lower ends of the guide rods are connected together through a connecting plate, and a vertical upward lifting cylinder is provided on the connecting plate, and the upper end of the piston rod of the lifting cylinder is connected to the lifting plate.

[0014] Furthermore, the scissors module is an automated pneumatic scissors.

[0015] Furthermore, the rounding processing component includes a mounting seat, on which four groups of rounding processing cylinders are arranged, and the front ends of the piston rods of the four groups of rounding processing cylinders are each provided with a repair mold.

[0016] The beneficial effects of the present invention are as follows: the present invention realizes the automatic stretching of the inner core shaft of the medical catheter, so that the core shaft is separated from the inner wall of the catheter, effectively improving the production efficiency while reducing manpower requirements and lowering labor costs; secondly, after stretching the core shaft, the present application realizes the shearing of the core shaft and the rounding repair of the port, avoiding the problem of the inner wall of the catheter being scratched by the burrs at the fracture during subsequent core pulling, thereby ensuring production quality.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the description, the following is a detailed description of the preferred embodiments of the present invention with the accompanying drawings. The specific implementation methods of the present invention are given in detail in the following embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a schematic diagram of the fixed end fixture structure of the utility model;

[0022] Figure 4 This is a schematic structural diagram of the clamp adjustment device of the utility model;

[0023] Figure 5 This is a connection diagram of the shearing and rounding mechanism of the utility model;

[0024] Figure 6 This is a schematic diagram of the operating status of the utility model.

[0025] Explanation of the numbers in the figure: 1. Fixed end fixture; 2. Movable end fixture; 3. Fixture adjustment device; 4. Shearing and rounding mechanism; 11. Support frame; 12. Pneumatic wedge fixture; 13. Position sensor; 14. Tension sensor; 31. Linear guide; 32. Movable plate; 33. Fixed shaft; 34. Fixed plate; 35. Drive motor; 36. Gear; 37. Rack; 41. Stretching scissors assembly; 42. Smoothing processing assembly; 411. Scissors module; 412. Connecting seat; 413. Support rod; 414. Lifting plate; 415. Linear bearing; 416. Guide rod; 417. Connecting plate; 418. Lifting cylinder; 421. Mounting seat; 422. Smoothing processing cylinder; 423. Repair mold. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] See also Figure 1As shown, a medical catheter core shaft stretching mechanism includes a fixed end clamp 1, a movable end clamp 2, a clamp adjustment device 3 and a shearing and rounding mechanism 4; the fixed end clamp 1 and the movable end clamp 2 are arranged opposite to each other, and the movable end clamp 2 is arranged on the clamp adjustment device 3, and the movable end clamp 2 can change the distance between the fixed end clamp 1 by adjusting the clamp adjustment device 3; the shearing and rounding mechanism 4 is arranged upstream of the clamping mouth of the movable end clamp 2, and the shearing and rounding mechanism 4 is also arranged on the clamp adjustment device 3, and moves synchronously with the movable end clamp 2.

[0029] In this embodiment, see Figure 3 As shown, the fixed end clamp 1 includes a support frame 11, on which is provided a pneumatic wedge clamp 12 for clamping one end of the core shaft in the medical catheter, and a position sensor 13 is provided upstream of the clamping mouth of the pneumatic wedge clamp 12, and the position sensor 13 is fixed to the support frame 11 through a corresponding support seat.

[0030] See also Figure 2 As shown, the movable end clamp 2 also includes a support frame 11, and a pneumatic wedge clamp 12 for clamping the other end of the core shaft in the medical catheter is provided on the support frame 11. A position sensor 13 is also provided upstream of the clamping mouth of the pneumatic wedge clamp 12, but the position sensor 13 is provided on the shearing and rounding mechanism 4, and a tension sensor 14 for real-time monitoring of the tension is provided on the rear side of the pneumatic wedge clamp 12.

[0031] See also Figure 4 As shown, the clamp adjustment device 3 includes a pair of linear guide rails 31, and a movable plate 32 is provided on the slide of the pair of linear guide rails 31. The lower end surface of the movable plate 32 is provided with a fixed plate 34 through a fixed shaft 33, and the fixed plate 34 is provided with a vertical upward driving motor 35. A gear 36 is sleeved on the output shaft of the driving motor 35, and the gear 36 is meshed with a rack 37, and the two are connected by helical teeth. The direction in which the rack 37 is set is parallel to the setting direction of the pair of linear guide rails 31; during installation, the pair of linear guide rails 31 and the rack 37 are fixedly connected, and the movable end clamp 2 is fixed to the movable plate 32 through the supporting frame 11 to which it belongs; during operation, the driving motor 35 drives the gear 36 to rotate, thereby driving the components other than the pair of linear guide rails 31 and the rack 37 to move along the pair of linear guide rails 31, thereby driving the change of the distance between the movable plate 32 and the fixed end clamp 1.

[0032] See also Figure 2As shown, the shearing and rounding mechanism 4 consists of a stretching scissors assembly 41 and a smoothing processing assembly 42; when installed, the stretching scissors assembly 41 is located between the smoothing processing assembly 42 and the movable end clamp 2, and the stretching scissors assembly 41 is adjacent to the smoothing processing assembly 42.

[0033] In this embodiment, see Figure 5 As shown, the stretching scissors assembly 41 includes a scissors module 411, and the scissors module 411 is an automated pneumatic scissors. A connecting seat 412 is respectively provided on a pair of side walls of the scissors assembly 411. The lower ends of the connecting seats 412 are respectively provided on a lifting plate 414 through two groups of support rods 413. A pair of guide rods 416 are passed through the lifting plate 414 through linear bearings 415. The lower ends of the guide rods 416 are connected together through a connecting plate 417. A vertical upward lifting plate 417 is provided on the connecting plate 417. The lowering cylinder 418, the upper end of the piston rod of the lifting cylinder 418 is connected to the lifting plate 414; when installed, the upper ends of a pair of guide rods 416 are fixedly connected to the lower end surface of the movable plate 32; during operation, the lifting plate 414 can move up and down along the guide rod 416 through the drive of the lifting cylinder 418, thereby driving the scissors assembly 411 to move up and down through the support rod 413 and the connecting seat 412, and then realizing the scissors assembly 411 rising to cut the core shaft at the other end, and then descending to reset to the initial position.

[0034] Continue to see Figure 5 As shown, the smooth processing component 42 includes a mounting seat 421, and four groups of smooth processing cylinders 422 are provided on the mounting seat 421. The front ends of the piston rods of the four groups of smooth processing cylinders 422 are all provided with a repair mold 423; when installed, the smooth processing component 42 is fixed to the movable plate 32 through the mounting seat 421 to which it belongs, and the position sensor 13 provided on the movable end fixture 2 is provided on the mounting seat 421; when the shear cut at the other end of the core shaft is repaired, the four groups of smooth processing cylinders 422 are two-by-two. The relative and relatively arranged smoothing cylinders 422 move synchronously, and the two pairs of the smoothing cylinders 422 drive the repair mold 423 set at the front end to squeeze the core shaft inward, so as to squeeze the burrs at the core shaft port flat; and in this embodiment, a conical structure is provided on the extrusion surface of the repair mold 423. After the two pairs of the smoothing cylinders 422 drive the repair mold 423 to trim the core shaft multiple times (such as 2 times, 3 times, etc.), the fracture of the core shaft can be adjusted to a cone, which is conducive to the subsequent extraction of the core shaft from the catheter.

[0035] The working principle of this utility model is as follows:

[0036] Before operation, see Figure 6 As shown in the drawings (the label A in the drawing represents the workbench; the label B in the drawing represents the transplanting clamping mechanism; and the label C in the drawing represents the core-pulling medical catheter), first, the mechanism is installed on the workbench, at this time, the fixed-end clamp 1 is fixed on the workbench through the support frame 11, and the pair of linear guides 31 and the rack 37 of the clamp adjusting device 3 are also fixed on the workbench; then, according to the size of the core-pulling medical catheter, the movable-end clamp 2 is driven by the clamp adjusting device 3 to move to the appropriate position.

[0037] During operation, first, the transplanting clamping mechanism transfers the core-pulling medical catheter to the gap between the pneumatic wedge clamps 12 of the fixed-end clamp 1 and the movable-end clamp 2, at this time, after the bit sensor 13 monitors that the core-pulling medical catheter is in place, the pneumatic wedge clamp 12 of the fixed-end clamp 1 clamps one end of the core shaft, and the pneumatic wedge clamp 12 of the movable-end clamp 2 clamps the other end of the core shaft; then, the clamp adjusting device 3 drives the movable-end clamp 2 to move away from the fixed-end clamp 1 until the tensile sensor 14 monitors that the movable-end clamp 2 moves to the preset tensile position, and the clamp adjusting device 3 stops driving the movable-end clamp 2 to move; then, after the other-end core shaft is cut off by the stretching scissors assembly 41, the smooth processing assembly 42 repairs the core shaft port, and after the repair is completed, the pneumatic wedge clamps 12 of the fixed-end clamp 1 and the movable-end clamp 2 release the clamping of the core shaft; then, the transplanting clamping mechanism transfers the core-pulling medical catheter after stretching to the next process.

[0038] It should be noted that, during the stretching of the core shaft, the transplanting clamping mechanism always clamps the catheter of the core-pulling medical catheter to avoid deformation of the catheter following the movement of the core shaft during the stretching of the core shaft; and after the core shaft is stretched, the transplanting clamping mechanism clamps the other end to avoid the other end from falling off after the gap of the pneumatic wedge clamp 12 of the movable-end clamp 2 is opened after the other end is cut off.

[0039] The above only describes preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A medical catheter core shaft stretching mechanism, characterized by: The invention comprises a fixed end clamp (1), a movable end clamp (2), a clamp adjustment device (3) and a shearing and rounding mechanism (4); the fixed end clamp (1) and the movable end clamp (2) are arranged relative to each other, and the movable end clamp (2) is arranged on the clamp adjustment device (3); the movable end clamp (2) can change the distance between the fixed end clamp (1) and the movable end clamp (2) by adjusting the clamp adjustment device (3); The shearing and rounding mechanism (4) is arranged upstream of the clamping opening of the movable end clamp (2), and the shearing and rounding mechanism (4) is also arranged on the clamp adjusting device (3) and moves synchronously with the movable end clamp (2).

2. The medical catheter core shaft stretching mechanism according to claim 1, characterized in that: The fixed end clamp (1) and the movable end clamp (2) both comprise a support frame (11) and a pneumatic wedge clamp (12) arranged on the support frame (11).

3. The medical catheter core shaft stretching mechanism according to claim 2, characterized in that: The fixed end clamp (1) and the movable end clamp (2) both further include a position sensor (13) for monitoring whether the medical catheter is in place.

4. The medical catheter core shaft stretching mechanism according to claim 2, characterized in that: The movable end clamp (2) is also provided with a tension sensor (14) for real-time monitoring of the tension magnitude.

5. The medical catheter core shaft stretching mechanism according to claim 1, characterized in that: The clamp adjustment device (3) includes a pair of linear guide rails (31), a movable plate (32) is provided on the slide of the pair of linear guide rails (31), a fixed plate (34) is provided on the lower end surface of the movable plate (32) through a fixed shaft (33), a vertically upward driving motor (35) is provided on the fixed plate (34), a gear (36) is sleeved on the output shaft of the driving motor (35), the gear (36) is meshed with a rack (37), and the direction in which the rack (37) is set is parallel to the direction in which the pair of linear guide rails (31) are set.

6. The medical catheter core shaft stretching mechanism according to claim 5, characterized in that: The gear (36) and the rack (37) are connected by helical tooth engagement.

7. The medical catheter core shaft stretching mechanism according to claim 1, characterized in that: The shearing and rounding mechanism (4) is composed of a stretching scissors component (41) and a rounding processing component (42).

8. The medical catheter core shaft stretching mechanism according to claim 7, characterized in that: The stretching scissors assembly (41) includes a scissors module (411), wherein a pair of side walls of the scissors module (411) are respectively provided with a connecting seat (412), the lower end of the connecting seat (412) is respectively provided on a lifting plate (414) through two groups of support rods (413), a pair of guide rods (416) are passed through the lifting plate (414) through linear bearings (415), the lower ends of the guide rods (416) are connected together through a connecting plate (417), a vertical upward lifting cylinder (418) is provided on the connecting plate (417), and the upper end of the piston rod of the lifting cylinder (418) is connected to the lifting plate (414).

9. The medical catheter core shaft stretching mechanism according to claim 8, characterized in that: The scissor module (411) is an automated pneumatic scissors.

10. The medical catheter core shaft stretching mechanism according to claim 7, characterized in that: The smoothing component (42) includes a mounting seat (421), on which four groups of smoothing cylinders (422) are arranged, and the front ends of the piston rods of the four groups of smoothing cylinders (422) are each provided with a repairing mold (423).

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