Tube drawing machine for manufacturing vascular intervention catheter

Abstract

The invention relates to the technical field of vascular intervention catheter machining, in particular to a vascular intervention catheter manufacturing tube drawing machine which comprises a machine base frame, a lead screw is rotationally connected to the inner side of the machine base frame and driven by a motor shaft of a servo motor fixedly installed at one end of the machine base frame, and transverse plates are symmetrically and fixedly connected to the two ends of the top of the machine base frame. A material passing groove is formed in the side face of the transverse plate in a penetrating mode, a mounting groove is formed in the upper end of the transverse plate in a downwards-sunken mode, inserting grooves are symmetrically formed in the two ends of an inner cavity of the mounting groove, a mold is movably inserted into the mounting groove up and down, and butt joint toothed plates are symmetrically and fixedly connected to the two ends of the mold. One end of the vascular intervention catheter penetrates through an inner cavity of the mold, the vascular intervention catheter is clamped and fixed through cooperation of an inverted-V-shaped clamping groove in the lower end of an upper clamping block in the clamping mechanism and a V-shaped clamping groove in the bottom of a concave adjusting base, and the ends of the multiple vascular intervention catheters can be clamped and fixed at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of vascular intervention catheter processing, in particular to a tube drawing machine for manufacturing vascular intervention catheters. Background Art

[0002] Vascular intervention catheters are mostly used in clinical practice to enter the femoral artery from outside the body and reach the carotid artery or intracranial artery through the human artery. There are many types of vascular intervention catheters, including microcatheters, guide catheters, balloon catheters, intermediate catheters, etc. Usually, several different types of vascular intervention catheters are used in combination in a vascular intervention procedure.

[0003] During the manufacturing process of vascular interventional catheters, a tube drawing machine is used for processing. During the processing of the vascular interventional catheter, one end of the vascular interventional catheter is first passed through the mold and the end of the vascular interventional catheter is clamped and fixed by a clamping device, and then the vascular interventional catheter is driven by a traction device to pass through the inner cavity of the mold in turn, thereby completing the processing. Existing tube drawing machines have certain defects during use. During the manufacturing process, most of them can only process a single model of vascular interventional catheters. When vascular interventional catheters of different diameters need to be processed, the mold needs to be replaced frequently, which increases the workload and greatly reduces work efficiency. The clamping device on the existing tube drawing machine has poor stability when clamping and fixing the vascular interventional catheter. During the traction and pulling process, it is easy to cause the vascular interventional catheter and the clamping device to loosen or fall off, thereby affecting the normal processing of the vascular interventional catheter. Summary of the invention

[0004] The object of the present invention is to provide a tube drawing machine for manufacturing vascular intervention catheters to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a tube drawing machine for manufacturing vascular interventional catheters, comprising a machine base frame, the inner side of the machine base frame is rotatably connected to a screw rod, the screw rod is driven by a motor shaft of a servo motor fixedly installed at one end of the machine base frame, and cross plates are symmetrically fixedly connected to the two ends of the top of the machine base frame, a material passing trough is penetrated through the side of the cross plate, and a mounting groove is recessed downward at the upper end of the cross plate, slots are symmetrically provided at both ends of the inner cavity of the mounting groove, a mold is movably inserted in the mounting groove up and down, and docking tooth plates are symmetrically fixedly connected at both ends of the mold, and positioning mechanisms are symmetrically installed at both ends of the cross plate, a reciprocating traction mechanism is installed at the upper end of the machine base frame, a left-right adjustment mechanism is installed at the upper end of the reciprocating traction mechanism, a clamping mechanism is installed in the left-right adjustment mechanism, and a lifting transmission mechanism for driving the clamping mechanism to move up and down is installed at the upper end of the reciprocating traction mechanism.

[0006] Preferably, a groove is provided on the side of the slot, the positioning mechanism includes a positioning tooth block slidably installed in the groove, a first pull rod is slidably inserted in the side of the horizontal plate, one end of the first pull rod extends into the groove and is fixedly connected to the side of the positioning tooth block, a positioning spring is sleeved on the end of the first pull rod in the groove, and the two ends of the positioning spring are respectively in contact with the side of the groove and the side of the positioning tooth block; The butt joint tooth plate is slidably connected with the slot up and down, and the positioning tooth block is clamped with the butt joint tooth plate.

[0007] Preferably, the reciprocating traction mechanism includes a traction base slidably mounted on the upper end of the machine base frame, a transmission sleeve is fixedly mounted on the lower end of the traction base, the transmission sleeve is sleeved on the screw rod, the screw rod and the transmission sleeve are threadedly connected, the lower end of the traction base is symmetrically fixedly connected with a guide block, the upper end of the machine base frame is symmetrically provided with a guide groove, and the guide block is slidably connected to the guide groove back and forth.

[0008] Preferably, the left-right adjustment mechanism includes a concave adjustment seat slidably installed on the upper end of the traction base, the front and rear side plates of the concave adjustment seat are penetrated by rectangular grooves, the left and right side walls of the rectangular groove are symmetrically provided with sliding grooves, the bottom of the concave adjustment seat is symmetrically penetrated downward by a fixed screw sleeve, the inner thread of the fixed screw sleeve is connected to a locking screw, and the lower end of the locking screw is fixedly connected to an insertion rod.

[0009] Preferably, the upper end of the traction base is symmetrically provided with convex grooves matching the convex plates, and the upper end of the traction base is equidistantly provided with multiple sockets between the two convex grooves. The convex plate is slidably connected to the convex grooves left and right, and the lower end of the insertion rod is plugged into the socket.

[0010] Preferably, the clamping mechanism comprises a lifting block installed in a concave adjustment seat, the left and right sides of the lifting block are symmetrically fixedly connected with slide plates, the front and rear sides of the lifting block are equidistantly provided with a plurality of lifting grooves, the left and right side walls of the lifting groove are symmetrically provided with limiting grooves, a circular groove is provided through the top of the lifting groove, an annular groove is provided on the inner side wall of the circular groove, a contraction groove is provided on the inner side wall of the annular groove, and a T-shaped connecting plate is fixedly installed on the upper end of the lifting block; An internal threaded sleeve is inserted and connected through the inner and outer parts of the circular groove, and an adjustment sleeve, an outer gear ring and a limit ring are fixedly connected to the inner threaded sleeve from top to bottom in sequence. The adjustment sleeve and the limit ring are respectively arranged at the upper and lower ends of the circular groove, and the outer gear ring is arranged in the annular groove. A locking mechanism for fixing the outer gear ring is installed in the shrinkage groove; A stud is inserted through the internal thread sleeve, and the lower end of the stud passes through the internal thread sleeve and extends into the lifting groove and is fixedly connected to the upper clamping block. The left and right sides of the upper clamping block are symmetrically fixedly connected to the limiting blocks.

[0011] Preferably, an inverted V-shaped clamping groove is formed at the lower end of the upper clamping block, and a plurality of V-shaped clamping grooves are formed at an equal distance at the upper end of the concave adjustment seat below the plurality of lifting grooves, and the inverted V-shaped clamping grooves and the V-shaped clamping grooves are symmetrically distributed up and down.

[0012] Preferably, the lifting block is slidably connected to the rectangular groove up and down, the slide plate is slidably connected to the slide groove up and down, the internal thread sleeve is rotatably connected to the circular groove, the adjustment sleeve is in rotational contact with the upper end of the lifting block, and the limit ring is in rotational contact with the top of the lifting groove; The upper clamping block is connected to the lifting slot in an up-and-down sliding manner, and the limiting block is connected to the limiting slot in an up-and-down sliding manner.

[0013] Preferably, the locking mechanism includes a second pull rod slidably inserted into the side of the lifting block, the end of the second pull rod extends into the contraction groove and is fixedly connected to the side of the locking tooth block, the side of the locking tooth block is symmetrically fixedly connected with an elastic sheet, one side of the elastic sheet abuts against the side of the contraction groove, and the locking tooth block is clamped with the outer gear ring.

[0014] Preferably, the lifting transmission mechanism includes a concave frame spanning the concave adjustment seat, the two lower ends of the concave frame are fixedly connected to the two ends of the traction base, the upper end of the concave frame is equidistantly fixedly installed with a telescopic cylinder, the lower end of the telescopic cylinder piston rod is fixedly connected to a connecting guide rail, the connecting guide rail is sleeved on a T-shaped connecting plate, a T-shaped slot is provided at the lower end of the connecting guide rail, and the T-shaped connecting plate is slidably connected to the T-shaped slot left and right.

[0015] Compared with the prior art, the invention has the following advantages: 1. During operation, one end of the vascular intervention catheter is passed through the inner cavity of the mold, and the vascular intervention catheter is clamped and fixed by the inverted V-shaped clamping groove at the lower end of the upper clamping block in the clamping mechanism and the V-shaped clamping groove at the bottom of the concave adjustment seat, and the ends of multiple vascular intervention catheters can be clamped and fixed at the same time; the vascular intervention catheter is driven to move by the reciprocating traction mechanism, so that the vascular intervention catheter passes through the inner cavity of the mold in turn, thereby completing the processing; when the reciprocating traction mechanism and the clamping mechanism move to the rear end or front end of the machine frame, the processed vascular intervention catheter is disassembled, and at the same time, one end of the vascular intervention catheter to be processed is passed through the inner cavity of the mold close to the clamping mechanism, and then clamped and fixed by the clamping mechanism and the concave adjustment seat; Traditional tube pulling machines can only perform tube pulling operations when moving forward or backward, which requires the equipment to run empty, causing unnecessary waste and greatly reducing work efficiency. The tube pulling machine of the present invention can drive the vascular intervention catheter for processing while the reciprocating traction mechanism moves forward and backward, greatly improving work efficiency.

[0016] 2. The positioning mechanism set at both ends of the horizontal plate can facilitate the installation and disassembly of the mold, reducing the burden on the staff and greatly improving work efficiency.

[0017] 3. The left and right adjustment mechanism can drive the clamping mechanism to move left and right synchronously, so that the clamping parts in the clamping mechanism can correspond to different cavities on the mold, that is, the upper clamping block can correspond to different cavities on the mold, thereby being able to pull vascular intervention catheters of different diameters.

[0018] 4. By rotating the adjusting sleeve, the stud drives the upper clamping block to move up and down, thereby adjusting the position of the upper clamping block in the lifting slot, so that the upper clamping block can clamp and fix vascular intervention catheters of different diameters; the outer tooth ring is locked by the provided locking mechanism, so as to ensure that the upper clamping block will not swing up and down along the lifting slot during operation, so that the clamping mechanism can stably clamp and fix the vascular intervention catheter; the positions of multiple upper clamping blocks at the upper end of the lifting block can be adjusted as needed, so that the clamping mechanism can clamp and fix multiple vascular intervention catheters of different diameters at one time, thereby improving the application range of the tube drawing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of the structure of a tube drawing machine for manufacturing a vascular intervention catheter of the present invention; Figure 2 It is a cross-sectional view of the horizontal plate structure of the present invention; Figure 3 This is an exploded view of the cross plate, mold and positioning mechanism structure of the present invention; Figure 4 It is a front cross-sectional view of the structure of a tube drawing machine for manufacturing a vascular intervention catheter of the present invention; Figure 5 A partial structural cross-sectional view of a tube drawing machine for manufacturing a vascular intervention catheter according to the present invention; Figure 6 It is a cross-sectional view of the reciprocating traction mechanism, the left-right adjustment mechanism and the lifting transmission mechanism of the present invention; Figure 7 It is an exploded view of the reciprocating traction mechanism, the left and right adjustment mechanism, the clamping mechanism and the lifting transmission mechanism of the present invention; Figure 8 It is a cross-sectional view of the clamping mechanism structure of the present invention; Fig. 9 It is a cross-sectional view of the clamping mechanism structure of the present invention; Fig.10 It is an exploded view of the clamping mechanism structure of the present invention.

[0020] In the figure: 1, machine base frame; 11, screw rod; 12, guide groove; 2, horizontal plate; 21, mounting groove; 22, slot; 23, groove; 24, mold; 25, docking tooth plate; 3, positioning tooth block; 31, first pull rod; 32, positioning spring; 4, traction base; 41, transmission sleeve; 42, guide block; 43, convex groove; 44, socket; 5, concave frame; 51, telescopic cylinder; 52, connecting guide rail; 6, concave adjustment seat; 61, rectangular groove; 62, Slide groove; 63, convex plate; 64, fixing screw sleeve; 65, locking screw; 66, plug rod; 7, lifting block; 71, slide plate; 72, lifting groove; 73, limiting groove; 74, circular groove; 75, annular groove; 76, shrinkage groove; 77, T-type connecting plate; 8, internal thread sleeve; 81, adjusting sleeve; 82, external gear ring; 83, limiting ring; 84, stud; 85, upper clamping block; 86, limiting block; 9, second pull rod; 91, locking gear block; 92, elastic sheet. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 10 The present invention provides a technical solution: a tube drawing machine for manufacturing vascular intervention catheters, comprising a machine base frame 1, the inner side of the machine base frame 1 is rotatably connected with a screw rod 11, the screw rod 11 is driven by a motor shaft of a servo motor fixedly installed at one end of the machine base frame 1, and the two ends of the top of the machine base frame 1 are symmetrically fixedly connected with cross plates 2, the side of the cross plate 2 is penetrated with a material passing trough, the upper end of the cross plate 2 is recessed downward and provided with a mounting groove 21, and the two ends of the inner cavity of the mounting groove 21 are symmetrically provided with slots 22, a mold 24 is movably inserted in the mounting groove 21, and the two ends of the mold 24 are symmetrically fixedly connected with docking tooth plates 25, and the two ends of the cross plate 2 are symmetrically installed with positioning mechanisms, and the upper end of the machine base frame 1 is installed with a reciprocating traction mechanism, and the upper end of the reciprocating traction mechanism is installed with a left-right adjustment mechanism, and a clamping mechanism is installed in the left-right adjustment mechanism, and the upper end of the reciprocating traction mechanism is installed with a lifting transmission mechanism for driving the clamping mechanism to move up and down.

[0023] See also Figures 1 to 3A groove 23 is provided on the side of the slot 22, and the positioning mechanism includes a positioning tooth block 3 slidably installed in the groove 23. A first pull rod 31 is slidably inserted in the side of the horizontal plate 2. One end of the first pull rod 31 extends into the groove 23 and is fixedly connected to the side of the positioning tooth block 3. A positioning spring 32 is sleeved on the end of the first pull rod 31 in the groove 23, and the two ends of the positioning spring 32 are respectively in contact with the side of the groove 23 and the side of the positioning tooth block 3; The butt-jointed tooth plate 25 is slidably connected to the slot 22 up and down, and the positioning tooth block 3 is clamped with the butt-jointed tooth plate 25 .

[0024] The cross-sections of the teeth of the docking tooth plate 25 and the positioning tooth block 3 are both right-angled, wherein the right-angled end of the teeth of the docking tooth plate 25 is at the upper end, and the right-angled end of the teeth of the positioning tooth block 3 is at the lower end; In order to facilitate the installation and removal of the mold 24, a handle can be fixedly installed on the upper end of the mold 24; When the mold 24 is inserted downward along the installation groove 21, the mold 24 drives the docking tooth plate 25 to be inserted downward along the slot 22. When the docking tooth plate 25 contacts the positioning tooth block 3, the docking tooth plate 25 pushes the positioning tooth block 3 to move into the groove 23. At the same time, the positioning tooth block 3 squeezes the positioning spring 32. When the mold 24 is fully inserted into the installation groove 21, the positioning tooth block 3 is engaged with the docking tooth plate 25 under the action of the elastic force of the positioning spring 32, so that the docking tooth plate 25 cannot move upward. At this time, the lower end of the docking tooth plate 25 abuts against the bottom of the slot 22. The positioning mechanism prevents the docking tooth plate 25 from moving up and down, and the locking is completed, thereby completing the installation of the mold 24 and making the mold 24 relatively fixed to the cross plate 2.

[0025] See also Figure 1 , Figures 4 to 7 The reciprocating traction mechanism includes a traction base 4 slidably mounted on the upper end of the machine base frame 1, a transmission sleeve 41 is fixedly mounted on the lower end of the traction base 4, the transmission sleeve 41 is sleeved on the screw rod 11, the screw rod 11 is threadedly connected to the transmission sleeve 41, the lower end of the traction base 4 is symmetrically fixedly connected with a guide block 42, the upper end of the machine base frame 1 is symmetrically provided with a guide groove 12, and the guide block 42 is slidably connected to the guide groove 12 front and back.

[0026] The motor shaft of the servo motor drives the screw rod 11 to rotate forward and reverse, so that the transmission sleeve 41 moves forward and backward along the screw rod 11, and the transmission sleeve 41 drives the traction base 4 to slide forward and backward along the upper end of the machine base frame 1. At the same time, the traction base 4 drives the guide block 42 to slide forward and backward along the guide groove 12, so that the traction base 4 can move forward and backward stably.

[0027] The left-right adjustment mechanism includes a concave adjustment seat 6 slidably installed on the upper end of the traction base 4. The front and rear side plates of the concave adjustment seat 6 are penetrated with rectangular grooves 61, and the left and right side walls of the rectangular groove 61 are symmetrically provided with sliding grooves 62. The bottom of the concave adjustment seat 6 is symmetrically penetrated and fixedly inserted with a fixing screw sleeve 64 downwardly and fixedly inserted, and the fixing screw sleeve 64 is internally threadedly connected to a locking screw 65, and the lower end of the locking screw 65 is fixedly connected to a plug rod 66.

[0028] The upper end of the traction base 4 is symmetrically provided with convex grooves 43 matching the convex plates 63, and the upper end of the traction base 4 is equidistantly provided with multiple insertion holes 44 between the two convex grooves 43. The convex plate 63 is slidably connected to the convex grooves 43 left and right, and the lower end of the insertion rod 66 is plugged into the insertion hole 44.

[0029] When it is necessary to adjust the concave adjustment seat 6 to the left or right, first screw the locking screw 65 upward along the fixing screw sleeve 64, and the locking screw 65 drives the insertion rod 66 to move upward from the insertion hole 44. At this time, the concave adjustment seat 6 can be pushed left or right along the traction base 4, thereby adjusting the left and right position of the concave adjustment seat 6. When the concave adjustment seat 6 moves left or right, it drives the convex plate 63 to slide left and right along the convex groove 43, so that the concave adjustment seat 6 can move left and right stably, and the convex plate 63 and the convex groove 43 are matched, so that the concave adjustment seat 6 can only move left and right along the traction base 4. After the adjustment is completed, the locking screw 65 is screwed downward along the fixing screw sleeve 64 , and the locking screw 65 drives the insertion rod 66 to be inserted downward into the insertion hole 44 , so that the concave adjustment seat 6 cannot move left and right, thereby fixing the concave adjustment seat 6 .

[0030] See also Figures 7 to 10 The clamping mechanism includes a lifting block 7 installed in the concave adjustment seat 6, and the left and right sides of the lifting block 7 are symmetrically fixedly connected with a slide plate 71, and the front and rear sides of the lifting block 7 are equidistantly provided with a plurality of lifting grooves 72, and the lower end of the lifting groove 72 penetrates the bottom of the lifting block 7 downward, so that the lower end of the lifting groove 72 is open, and the left and right side walls of the lifting groove 72 are symmetrically provided with a limiting groove 73, and the top of the lifting groove 72 is penetrated upward with a circular groove 74, and the inner side wall of the circular groove 74 is provided with an annular groove 75, and the inner side wall of the annular groove 75 is provided with a contraction groove 76, and the upper end of the lifting block 7 is fixedly installed with a T-shaped connecting plate 77; An internal threaded sleeve 8 is inserted and penetrated in the circular groove 74 from top to bottom, and an adjusting sleeve 81, an external toothed ring 82 and a limiting ring 83 are fixedly sleeved on the internal threaded sleeve 8 from top to bottom. The adjusting sleeve 81 and the limiting ring 83 are respectively arranged at the upper and lower ends of the circular groove 74, the external toothed ring 82 is arranged in the annular groove 75, and a locking mechanism for fixing the external toothed ring 82 is installed in the contraction groove 76; A stud 84 is inserted through the internal threaded sleeve 8, and the lower end of the stud 84 passes through the internal threaded sleeve 8 to extend into the lifting groove 72 and is fixedly connected to the upper clamping block 85. The upper clamping block 85 is symmetrically fixedly connected to the limit blocks 86 on both sides.

[0031] An inverted V-shaped clamping groove is provided at the lower end of the upper clamping block 85, and a plurality of V-shaped clamping grooves are provided at equal distances on the upper end of the concave adjustment seat 6 below the plurality of lifting grooves 72. The inverted V-shaped clamping groove and the V-shaped clamping groove are symmetrically distributed up and down, and the end of the vascular intervention catheter is clamped and fixed by the cooperation of the inverted V-shaped clamping groove and the V-shaped clamping groove.

[0032] The lifting block 7 is connected to the rectangular groove 61 by sliding up and down, the slide plate 71 is connected to the slide groove 62 by sliding up and down, the internal thread sleeve 8 is connected to the circular groove 74 by rotation, the adjustment sleeve 81 is in rotational contact with the upper end of the lifting block 7, and the limit ring 83 is in rotational contact with the top of the lifting groove 72; The upper clamping block 85 is connected to the lifting slot 72 in an up-and-down sliding manner, and the limiting block 86 is connected to the limiting slot 73 in an up-and-down sliding manner.

[0033] The adjustment sleeve 81 and the limiting ring 83 cooperate to enable the internal thread sleeve 8 to rotate stably along the circular groove 74 .

[0034] The internal threaded sleeve 8 is driven to rotate by rotating the adjusting sleeve 81, and the internal threaded sleeve 8 rotates along the stud 84, so that the stud 84 moves up and down along the internal threaded sleeve 8, and the stud 84 drives the upper clamping block 85 to move up and down along the lifting groove 72. At the same time, the upper clamping block 85 drives the limit block 86 to slide up and down along the limit groove 73, so that the upper clamping block 85 can be stably adjusted up and down, and then the upper clamping block 85 can clamp and fix vascular intervention catheters of different diameters.

[0035] See also Fig. 9 and Fig.10 The locking mechanism includes a second pull rod 9 that is slidably inserted into the side of the lifting block 7. The end of the second pull rod 9 extends into the contraction groove 76 and is fixedly connected to the side of the locking tooth block 91. The side of the locking tooth block 91 is symmetrically fixedly connected with an elastic sheet 92. One side of the elastic sheet 92 abuts against the side of the contraction groove 76, and the locking tooth block 91 is clamped with the outer gear ring 82.

[0036] The locking tooth block 91 is slidably connected to the contraction groove 76 in a forward and backward manner, and the elastic sheet 92 applies an elastic force to the locking tooth block 91; When there is no need to adjust the position of the upper clamping block 85, the outer gear ring 82 is locked by the provided locking mechanism to prevent the internal threaded sleeve 8 from rotating at will, thereby preventing the upper clamping block 85 from being offset or shaking in position.

[0037] See also Figure 1 , Figures 5 to 7The lifting transmission mechanism includes a concave frame 5 spanning the concave adjustment seat 6, the two lower ends of the concave frame 5 are fixedly connected to the two ends of the traction base 4, and the upper end of the concave frame 5 is equidistantly fixedly installed with a telescopic cylinder 51, which penetrates and is inserted into the upper end of the concave frame 5, and the lower end of the piston rod of the telescopic cylinder 51 is fixedly connected to the connecting guide rail 52, and the connecting guide rail 52 is sleeved on the T-shaped connecting plate 77, and a T-shaped slot is opened at the lower end of the connecting guide rail 52, and the T-shaped connecting plate 77 is clamped with the T-shaped slot, and the T-shaped connecting plate 77 is connected to the T-shaped slot for left and right sliding.

[0038] The piston rod of the telescopic cylinder 51 is extended and retracted to drive the connecting guide rail 52 to move up and down, and the connecting guide rail 52 drives the clamping mechanism to move up and down.

[0039] The clamping mechanism can only move up and down along the concave adjustment seat 6. When the concave adjustment seat 6 moves left and right, it will drive the clamping mechanism to move left and right synchronously. At this time, the T-shaped connecting plate 77 in the clamping mechanism slides left and right along the T-shaped groove at the lower end of the connecting guide rail 52.

[0040] Working principle: When working, firstly, one end of the vascular intervention catheter is extended from the inner cavity of the mold 24 to the V-shaped clamping groove of the concave adjustment seat 6, and the piston rod of the telescopic cylinder 51 is extended downward to drive the connecting guide rail 52 to move downward, and the connecting guide rail 52 drives the clamping mechanism to move downward. When the lower end of the lifting block 7 in the clamping mechanism contacts the bottom of the concave adjustment seat 6, the inverted V-shaped clamping groove at the lower end of the upper clamping block 85 is clamped at the upper end of the vascular intervention catheter, and the vascular intervention catheter is clamped and fixed by the cooperation of the inverted V-shaped clamping groove and the V-shaped clamping groove; In this way, multiple vascular intervention catheters can be passed through the inner cavity of the mold 24 as needed, and then the ends of the vascular intervention catheters can be clamped and fixed by the clamping mechanism and the concave adjustment seat 6; the mold 24 can be selected according to needs; The motor shaft of the servo motor drives the screw 11 to rotate, so that the transmission sleeve 41 drives the traction base 4 to move backward along the machine base frame 1, and the traction base 4 drives the clamping mechanism to move backward through the concave adjustment seat 6. The clamping mechanism drives the vascular intervention catheter to move, so that the vascular intervention catheter passes through the inner cavity of the mold 24 in sequence, thereby completing the processing.

[0041] At this time, the reciprocating traction mechanism and the clamping mechanism move to the rear end of the machine base frame 1, and the piston rod of the telescopic cylinder 51 contracts to drive the connecting guide rail 52 to move upward, and the connecting guide rail 52 drives the clamping mechanism to move upward, so that the processed vascular intervention catheter can be disassembled; at the same time, one end of the vascular intervention catheter to be processed can be passed through the inner cavity of the rear end mold 24 of the machine base frame 1, so that the end of the vascular intervention catheter extends to the V-shaped clamping groove on the rear side of the concave adjustment seat 6, and then the piston rod of the telescopic cylinder 51 extends downward, so that the clamping mechanism and the concave adjustment seat 6 cooperate with the V-shaped clamping groove to clamp and fix the end in the V-shaped clamping groove; Then, the motor shaft of the servo motor rotates in the opposite direction, so that the screw rod 11 drives the transmission sleeve 41 to move forward, and the transmission sleeve 41 drives the traction base 4 to move forward along the machine base frame 1. The traction base 4 drives the clamping mechanism to move forward through the concave adjustment seat 6, and the clamping mechanism drives the vascular intervention catheter to move, so that the vascular intervention catheter passes through the inner cavity of the mold 24 in sequence, thereby completing the processing; In this way, the reciprocating traction mechanism can drive the vascular interventional catheter to move while moving forward and backward, thereby processing the vascular interventional catheter; while the traditional tube pulling machine can only pull the tube when moving forward or backward, which causes the equipment to run empty, resulting in unnecessary waste and greatly reducing work efficiency.

[0042] When the mold 24 needs to be replaced or disassembled, the first pull rods 31 at both ends of the horizontal plate 2 are first pulled outward, and the first pull rods 31 drive the positioning tooth block 3 to move into the groove 23, so that the positioning tooth block 3 is separated from the docking tooth plate 25. At this time, the mold 24 is pulled upward along the installation groove 21, thereby completing the disassembly of the mold 24; When the mold 24 needs to be installed, the mold 24 is inserted downward along the installation groove 21, and the mold 24 drives the docking tooth plate 25 to be inserted downward along the slot 22. When the mold 24 is fully inserted into the installation groove 21, the positioning tooth block 3 and the docking tooth plate 25 are engaged with each other under the action of the elastic force of the positioning spring 32 to complete the locking, thereby completing the installation of the mold 24, making the mold 24 relatively fixed to the cross plate 2, and making the installation and disassembly of the mold 24 simple and convenient, thereby greatly improving the work efficiency.

[0043] The concave adjustment seat 6 can be adjusted and moved left and right along the traction base 4, and the concave adjustment seat 6 drives the clamping mechanism to move left and right synchronously, so that the clamping parts in the clamping mechanism can correspond to different mold cavities on the mold 24, that is, the upper clamping block 85 can correspond to different mold cavities on the mold 24, so that the vascular intervention catheters with different diameters can be pulled. The specific adjustment method is to first screw the locking screw 65 upward along the fixing screw sleeve 64, and the locking screw 65 drives the insertion rod 66 to move upward from the insertion hole 44. At this time, the concave adjustment seat 6 can be pushed left or right along the traction base 4, thereby adjusting the left and right positions of the concave adjustment seat 6. At the same time, the concave adjustment seat 6 drives the clamping mechanism to move left and right for left and right adjustment; After the adjustment is completed, the locking screw 65 is screwed downward along the fixing screw sleeve 64 , and the locking screw 65 drives the insertion rod 66 to be inserted downward into the insertion hole 44 , so that the concave adjustment seat 6 cannot move left and right, thereby fixing the concave adjustment seat 6 .

[0044] When it is necessary to clamp and fix vascular intervention catheters of different diameters, first pull the second pull rod 9 outward along the lifting block 7, and the second pull rod 9 drives the locking tooth block 91 to separate from the outer tooth ring 82. At this time, the adjusting sleeve 81 is rotated, and the adjusting sleeve 81 drives the internal thread sleeve 8 to rotate, and the internal thread sleeve 8 rotates along the stud 84, so that the stud 84 drives the upper clamping block 85 to move up and down along the lifting groove 72, thereby adjusting the position of the upper clamping block 85 in the lifting groove 72, so that the upper clamping block 85 can clamp and fix vascular intervention catheters of different diameters; After adjusting the position of the upper clamping block 85, loosen the second pull rod 9, and the locking tooth block 91 is engaged with the outer tooth ring 82 under the action of the elastic force of the elastic sheet 92, thereby locking the outer tooth ring 82 and preventing it from rotating, and also preventing the internal threaded sleeve 8 from rotating. At this time, the stud 84 and the upper clamping block 85 cannot move up and down along the lifting groove 72, thereby ensuring the stability of the upper clamping block 85, and when clamping the vascular intervention catheter, it can firmly clamp and fix the vascular intervention catheter.

[0045] The positions of the multiple upper clamping blocks 85 at the upper end of the lifting block 7 can be adjusted as needed, so that the clamping mechanism can clamp and fix multiple vascular intervention catheters of different diameters at one time, thereby improving the application range of the tube drawing machine.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tube drawing machine for manufacturing vascular interventional catheters, comprising a machine base frame (1), characterized in that: A screw rod (11) is rotatably connected to the inner side of the machine base frame (1), and the screw rod (11) is driven by a motor shaft of a servo motor fixedly mounted at one end of the machine base frame (1). A cross plate (2) is symmetrically fixedly connected to the two ends of the top of the machine base frame (1). A material passing groove is penetrated through the side of the cross plate (2). The upper end of the cross plate (2) is recessed downward to form a mounting groove (21). Slots (22) are symmetrically formed at both ends of the inner cavity of the mounting groove (21). A mold (24) is movably inserted in the mounting groove (21) up and down. The two ends of the mold (24) are symmetrically fixedly connected to docking tooth plates (25). Positioning mechanisms are symmetrically mounted at both ends of the cross plate (2). A reciprocating traction mechanism is mounted on the upper end of the machine base frame (1). A left-right adjustment mechanism is mounted on the upper end of the reciprocating traction mechanism. A clamping mechanism is mounted in the left-right adjustment mechanism. A lifting transmission mechanism for driving the clamping mechanism to move up and down is mounted on the upper end of the reciprocating traction mechanism.

2. A vascular intervention catheter manufacturing tube drawing machine according to claim 1, characterized in that: A groove (23) is provided on the side of the slot (22), and the positioning mechanism includes a positioning tooth block (3) slidably installed in the groove (23) left and right. A first pull rod (31) is slidably inserted into the side of the horizontal plate (2) left and right, and one end of the first pull rod (31) extends into the groove (23) and is fixedly connected to the side of the positioning tooth block (3). A positioning spring (32) is sleeved on the end of the first pull rod (31) in the groove (23), and the two ends of the positioning spring (32) are respectively in contact with the side of the groove (23) and the side of the positioning tooth block (3); The docking tooth plate (25) is slidably connected to the slot (22) up and down, and the positioning tooth block (3) is clamped to the docking tooth plate (25).

3. The vascular intervention catheter manufacturing tube drawing machine according to claim 1, characterized in that: The reciprocating traction mechanism comprises a traction base (4) slidably mounted on the upper end of a machine base frame (1) in a forward and backward manner, a transmission sleeve (41) being fixedly mounted on the lower end of the traction base (4), the transmission sleeve (41) being sleeved on a screw rod (11), the screw rod (11) being threadedly connected to the transmission sleeve (41), a guide block (42) being symmetrically fixedly connected to the lower end of the traction base (4), a guide groove (12) being symmetrically opened on the upper end of the machine base frame (1), the guide block (42) being slidably connected to the guide groove (12) in a forward and backward manner.

4. The tube drawing machine for manufacturing vascular intervention catheter according to claim 3, characterized in that: The left-right adjustment mechanism comprises a concave adjustment seat (6) slidably mounted on the upper end of the traction base (4) left-right, the front and rear side plates of the concave adjustment seat (6) both penetrate with rectangular grooves (61), the left and right side walls of the rectangular groove (61) symmetrically have sliding grooves (62), the bottom of the concave adjustment seat (6) penetrates downwardly and is fixedly inserted with a fixing screw sleeve (64) symmetrically left-right, the fixing screw sleeve (64) is internally threadedly connected with a locking screw (65), and the lower end of the locking screw (65) is fixedly connected with an insertion rod (66).

5. The tube drawing machine for manufacturing vascular intervention catheter according to claim 4, characterized in that: The upper end of the traction base (4) is symmetrically provided with convex grooves (43) matching the convex plates (63), and the upper end of the traction base (4) is equidistantly provided with a plurality of insertion holes (44) between the two convex grooves (43). The convex plates (63) are slidably connected to the convex grooves (43) left and right, and the lower end of the insertion rod (66) is plugged into the insertion hole (44).

6. The tube drawing machine for manufacturing vascular intervention catheter according to claim 4, characterized in that: The clamping mechanism comprises a lifting block (7) installed in a concave adjustment seat (6), the left and right sides of the lifting block (7) are symmetrically fixedly connected with a slide plate (71), the front and rear sides of the lifting block (7) are equidistantly provided with a plurality of lifting grooves (72), the left and right side walls of the lifting groove (72) are symmetrically provided with limit grooves (73), the top of the lifting groove (72) is provided with a circular groove (74) extending upward, the inner side wall of the circular groove (74) is provided with an annular groove (75), the inner side wall of the annular groove (75) is provided with a contraction groove (76), and the upper end of the lifting block (7) is fixedly provided with a T-shaped connecting plate (77); An internal threaded sleeve (8) is inserted and penetrated in the circular groove (74) from top to bottom, and an adjustment sleeve (81), an external toothed ring (82) and a limit ring (83) are fixedly sleeved on the internal threaded sleeve (8) from top to bottom in sequence, the adjustment sleeve (81) and the limit ring (83) are respectively arranged at the upper and lower ends of the circular groove (74), the external toothed ring (82) is arranged in the annular groove (75), and a locking mechanism for fixing the external toothed ring (82) is installed in the shrinkage groove (76); A stud (84) is inserted through the internal threaded sleeve (8), and the lower end of the stud (84) passes through the internal threaded sleeve (8) and extends into the lifting groove (72) and is fixedly connected to the upper clamping block (85). The left and right sides of the upper clamping block (85) are symmetrically fixedly connected to the limiting blocks (86).

7. The tube drawing machine for manufacturing vascular intervention catheter according to claim 6, characterized in that: An inverted V-shaped clamping groove is formed at the lower end of the upper clamping block (85), and a plurality of V-shaped clamping grooves are formed at an equal distance below the plurality of lifting grooves (72) at the upper end of the concave adjustment seat (6), wherein the inverted V-shaped clamping grooves and the V-shaped clamping grooves are symmetrically distributed up and down.

8. The tube drawing machine for manufacturing vascular intervention catheter according to claim 6, characterized in that: The lifting block (7) is slidably connected to the rectangular groove (61) up and down, the slide plate (71) is slidably connected to the slide groove (62) up and down, the internal thread sleeve (8) is rotatably connected to the circular groove (74), the adjustment sleeve (81) is in rotational contact with the upper end of the lifting block (7), and the limit ring (83) is in rotational contact with the top of the lifting groove (72); The upper clamping block (85) is connected to the lifting slot (72) in an up-and-down sliding manner, and the limiting block (86) is connected to the limiting slot (73) in an up-and-down sliding manner.

9. The tube drawing machine for manufacturing vascular intervention catheter according to claim 6, characterized in that: The locking mechanism comprises a second pull rod (9) which is slidably inserted into the side of the lifting block (7) in a forward and backward manner, the end of the second pull rod (9) extending into the contraction groove (76) and fixedly connected to the side of the locking tooth block (91), the side of the locking tooth block (91) is symmetrically fixedly connected with an elastic sheet (92), one side of the elastic sheet (92) abuts against the side of the contraction groove (76), and the locking tooth block (91) is clamped with the outer tooth ring (82).

10. The tube drawing machine for manufacturing vascular intervention catheter according to claim 9, characterized in that: The lifting transmission mechanism comprises a concave frame (5) straddling a concave adjustment seat (6), the two lower ends of the concave frame (5) being fixedly connected to the two ends of the traction base (4), the upper end of the concave frame (5) being equidistantly fixedly mounted with a telescopic cylinder (51), the lower end of the piston rod of the telescopic cylinder (51) being fixedly connected to a connecting guide rail (52), the connecting guide rail (52) being sleeved on a T-shaped connecting plate (77), the lower end of the connecting guide rail (52) being provided with a T-shaped slot, and the T-shaped connecting plate (77) being slidably connected to the T-shaped slot leftward and rightward.

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