A sheath spring wire winding device

Abstract

The application discloses a sheath spring wire winding device, which comprises a base plate, a first sliding rail, a second sliding rail, two first sliding seats, a second sliding seat and two end plates; a first mounting plate is fixed at the first sliding seat, a rotating shaft is installed at the first mounting plate, a jaw unit is installed at the rotating shaft, and a locking bolt capable of locking the position of the first sliding seat is arranged at the first sliding seat; a lead screw is installed between the end plates, a second driving unit for driving the lead screw is installed at one of the end plates; a mounting frame is fixed at the second sliding seat, a wire supply unit and a detection unit are installed at the mounting frame, the detection unit comprises a connecting rod and a circular ring part fixedly connected with the connecting rod, a lower protruding block and an upper protruding block are fixedly arranged at the circular ring part, a laser emitter is installed at the upper protruding block, and a light receiver is installed at the lower protruding block. The sheath spring wire winding device can detect the shaking of the inner layer pipe and limit the shaking amplitude.

Description

Technical Field

[0001] This application relates to the field of sheath tubes, and more specifically to a device for winding spring wire for sheath tubes. Background Technology

[0002] With the development of medical technology, the use of medical catheters and medical sheaths for treatment has been developed and proven to be a feasible treatment option. Sheaths are generally used in conjunction with guidewires and medical catheters. The general structure of a sheath usually includes an inner tube, an outer tube, and a spring wire between the inner and outer tubes. A pull wire and a pull ring are also installed inside the sheath. The structure of the inner tube, spring wire, and outer tube helps the sheath maintain a certain degree of toughness and is not easily deformed. In existing spring wire winding and inner tube operations, the inner tube is generally sleeved on the mandrel, and both ends are clamped by clamping units and driven to rotate. The winding unit moves while releasing wire, thereby achieving spring wire winding. However, during the rotation of the inner tube, due to its long length and small diameter, the inner tube will wobble. The wobble amplitude is large in the middle of the inner tube and small at both ends. This wobble will reduce the quality of spring wire winding and affect the quality of the sheath tube. Some winding devices will install limit rings at the winding unit to move with the winding unit, thereby limiting the wobble amplitude of the inner tube at the winding position. However, whether the inner tube will wobble during rotation is actually affected by a variety of factors, such as the rigidity of the whole consisting of the inner tube and the mandrel, the ratio of the inner tube's diameter to its length, and the rationality of the operator's clamping of both ends of the inner tube. Especially for sheaths from the same batch, the operational standard of clamping both ends has a greater impact on the wobble amplitude of the inner tube. Therefore, when processing a batch of inner tubes, in some cases the wobble amplitude of the inner tube is relatively large, and a limit ring must be used. In other cases, the wobble amplitude of the inner tube is not large, and a limit ring may not be necessary. In such cases, using a limit ring will actually cause excessive friction between the inner tube and the limit ring, resulting in some wear on the inner tube and frictional resistance to the rotation of the inner tube. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the above-mentioned defects, this application provides a sheath spring wire winding device.

[0004] Technical solution: A sheath spring wire winding device includes a base plate, a first slide rail mounted on the base plate, a second slide rail mounted on the base plate, two first slide blocks mounted on the first slide rail, a second slide block mounted on the second slide rail, and two end plates fixed to the base plate; a first mounting plate is fixed to the first slide block, a rotating shaft is mounted on the first mounting plate, a pawl unit is mounted on the rotating shaft, and a locking bolt capable of locking the first slide block position is provided on the first slide block; one of the two first mounting plates is equipped with a device for driving the first mounting plate. A first drive unit for rotating the shaft at the plate; a lead screw is installed between the end plates, and a second drive unit for driving the lead screw is installed at one of the end plates; the second slide has a second slide groove that mates with the second slide rail and a threaded hole that mates with the lead screw; a mounting bracket is fixed at the second slide, and a wire feeding unit and a detection unit are installed at the mounting bracket; the detection unit includes a connecting rod and an annular portion fixedly connected to the connecting rod; a lower protrusion and an upper protrusion are fixed at the annular portion; a laser emitter is installed at the upper protrusion, and a light receiver is installed at the lower protrusion.

[0005] Furthermore, the mounting frame includes a horizontal base plate and a second mounting plate fixedly connected to the horizontal base plate; the connecting rod is fixedly connected to the horizontal base plate.

[0006] Furthermore, the wire feeding unit includes a wire feeding spool, a third drive unit for driving the wire feeding spool to rotate, a tension guide roller, a first guide roller, two second guide rollers, a third guide roller, and a fourth guide roller.

[0007] This allows for a stable unwinding speed, with each guide roller guiding the yarn and the tensioning guide roller ensuring the yarn is tensioned.

[0008] Furthermore, the spring wire passes between two second guide rollers.

[0009] Furthermore, a first magnetic ring is fixed at the annular portion; two mounting blocks are fixed at the base plate, two guide rods are installed between the two mounting blocks, and sliders passing through the two guide rods are installed at the two guide rods. The sliders are connected to a limiting unit via an L-shaped connecting plate; an anchor point is provided at the L-shaped connecting plate, and an electric winding device is installed at the horizontal base plate. The end of the pull rope of the electric winding device is fixedly connected to the anchor point; the limiting unit is cylindrical and has a frustum-shaped channel. The limiting unit includes a first limiting portion and a second limiting portion. One end of the first limiting portion has a second magnetic ring that can attract the first magnetic ring, and the other end has an annular groove. The end of the second limiting portion has an insertion ring that can be inserted into the annular groove. A bearing unit is installed between the inner circumferential surface of the annular groove and the inner circumferential surface of the insertion ring. The first limiting portion has a first channel, and the second limiting portion has a second channel. The first channel and the second channel are spliced ​​together to form the frustum-shaped channel.

[0010] Furthermore, the anchor point is a semi-circular ring.

[0011] Furthermore, both ends of the frustum-shaped channel have arc-shaped chamfers.

[0012] This design prevents damage to the inner tube when the edge of the channel comes into contact with it. Additionally, the frustum-shaped channel is better suited to the characteristic of large swaying in the middle area and small swaying at both ends when the internal light vibrates.

[0013] Furthermore, a roller unit is installed at the slider. The roller unit includes a roller frame, a roller installed at the roller frame, and two connecting arms fixedly connected to the roller frame. The connecting arms are hinged to the slider, and a spring connects the roller frame and the slider.

[0014] The spring compresses the roller, allowing the slider to slide along the guide rod on one hand, and on the other hand, due to the influence of the spring, an external force is required for the slider to slide. Without an external force, the slider can remain relatively stable in a certain position.

[0015] Furthermore, each of the first slides is equipped with two locking bolts, and a knob is installed at each locking bolt.

[0016] This makes it easier to lock the position of the first slide.

[0017] This application also discloses a spring wire winding method based on the above-mentioned sheath spring wire winding device, comprising the following steps:

[0018] 1) Lock and fix the positions of the two first slide blocks;

[0019] 2) Install the inner tube and mandrel as a whole between the two jaw units;

[0020] 3) The first drive unit drives the inner tube and the mandrel to rotate as a whole, while the second drive unit drives the second slide to translate, and the third drive unit drives the wire feeding unit to feed wire so as to wind the spring wire.

[0021] 4) The laser generator and the light receiver perform detection. If the shaking of the whole consisting of the inner tube and the mandrel does not pass through the optical path of the laser generator and the light receiver, then continue to step 3) and the electric winding device unwinds the wire, keeping the slider in place; if the shaking of the whole consisting of the inner tube and the mandrel passes through the optical path of the laser generator and the light receiver, then continue to step 3) and the electric winding device winds the wire, bringing the slider closer to the second slide until the first magnetic ring and the second magnetic ring attract each other.

[0022] 5) After winding is completed, remove the inner tube and mandrel that are now complete.

[0023] Beneficial effects: The spring wire winding device of this application can detect the swaying amplitude of the inner tube, thereby determining whether the swaying amplitude is too large.

[0024] When the spring wire winding device of this application detects excessive swaying, it can make the drive limiting unit and the wire supply unit close together and move synchronously, thereby limiting the swaying amplitude of the inner tube and achieving better spring wire winding. Attached Figure Description

[0025] Figure 1 To minimize the swaying amplitude, a schematic diagram is drawn.

[0026] Figure 2 To illustrate the smaller amplitude of the swaying, draw a diagram from another perspective;

[0027] Figure 3 For situations with large swaying amplitude, a schematic diagram of the winding process is provided.

[0028] Figure 4 This is a schematic diagram of the limiting unit;

[0029] Figure 5 This is a schematic diagram showing the separation of the limiting unit components;

[0030] Figure 6 This is a schematic cross-sectional view of the limiting unit. Detailed Implementation

[0031] Reference numerals in the attached drawings: 1.1 First slide rail; 1.2 First slide block; 1.3 Claw unit; 1.4 Knob; 1.5 First drive unit; 1.6 First mounting plate;

[0032] 2.1 Second slide rail; 2.2 End plate; 2.3 Lead screw; 2.4 Second drive unit;

[0033] 3.1 Horizontal base plate; 3.2 Second mounting plate; 3.3 Second slide block; 3.5 Unwinding reel; 3.6 Tensioning guide roller; 3.7 First guide roller; 3.8 Second guide roller; 3.9 Third guide roller; 3.10 Fourth guide roller; 3.11 Third drive unit;

[0034] 4. Electric winding device; 4.1 Pull rope of electric winding device;

[0035] 5. Substrate; 5.1 Mounting block; 5.2 Guide rod; 6. Spring wire; 7. Inner tube;

[0036] 8.1 Connecting rod; 8.2 Circular part; 8.3 First magnetic ring; 8.4 Upper protrusion; 8.5 Lower protrusion; 8.5.1 Optical receiver;

[0037] 9.1 First limiting part; 9.1.1 Circular groove; 9.1.2 First channel; 9.2 Second limiting part; 9.2.1 Insertion ring; 9.2.2 Second channel; 9.3 Second magnetic ring; 9.4 Bearing unit; 9.5 L-shaped connecting plate; 9.5.1 Anchor point; 9.6 Slider; 9.7.1 Roller; 9.7.2 Roller frame; 9.7.3 Connecting arm; 9.7.4 Spring.

[0038] As shown in the figure: A sheath spring wire winding device includes a base plate 5, a first slide rail 1.1 mounted on the base plate 5, a second slide rail 2.1 mounted on the base plate 5, two first slide blocks 1.2 mounted on the first slide rail 1.1, a second slide block 3.3 mounted on the second slide rail 2.1, and two end plates 2.2 fixed on the base plate 5; a first mounting plate 1.6 is fixed to the first slide block 1.2, a rotating shaft is mounted on the first mounting plate 1.6, a pawl unit 1.3 is mounted on the rotating shaft, and a locking bolt capable of locking the first slide block 1.2 in position is provided on the first slide block 1.2; one of the two first mounting plates 1.6 is equipped with a rotating shaft for driving the first mounting plate 1.6. A first drive unit 1.5 for shaft rotation; a lead screw 2.3 is installed between the end plates 2.2, and a second drive unit 2.4 for driving the lead screw 2.3 is installed at one of the end plates 2.2; the second slide block 3.3 has a second slide groove that mates with the second slide rail 2.1 and a threaded hole that mates with the lead screw 2.3; a mounting bracket is fixed at the second slide block 3.3, and a wire feeding unit and a detection unit are installed at the mounting bracket; the detection unit includes a connecting rod 8.1 and an annular portion 8.2 fixedly connected to the connecting rod 8.1; a lower protrusion 8.5 and an upper protrusion 8.4 are fixed at the annular portion 8.2; a laser emitter is installed at the upper protrusion 8.4, and a light receiver 8.5.1 is installed at the lower protrusion 8.5. The mounting bracket includes a horizontal base plate 3.1 and a second mounting plate 3.2 fixedly connected to the horizontal base plate 3.1; the connecting rod 8.1 is fixedly connected to the horizontal base plate 3.1. The wire feeding unit includes a wire feeding reel 3.5, a third drive unit 3.1.1 for driving the wire feeding reel 3.5 to rotate, a tension guide roller 3.6, a first guide roller 3.7, two second guide rollers 3.8, a third guide roller 3.9, and a fourth guide roller 3.10. Two locking bolts are installed at each first slide 1.2, and a knob 1.4 is installed at each locking bolt.

[0039] A first magnetic ring 8.3 is fixed at the annular portion; two mounting blocks 5.1 are fixed at the base plate 5, and two guide rods 5.2 are installed between the two mounting blocks 5.1. A slider 9.6, through which the two guide rods 5.2 pass, is installed at the two guide rods 5.2. The slider 9.6 is connected to a limiting unit via an L-shaped connecting plate 9.5; the L-shaped connecting plate 9.5 has an anchor point 9.5.1; an electric winding device 4 is installed at the horizontal base plate 3.1, and the end of the pull rope 4.1 of the electric winding device 4 is fixedly connected to the anchor point 9.5.1; the limiting unit is cylindrical and has a frustum-shaped channel, and the limiting unit includes a first limiting part 9.1 and a second limiting part 9.2. The first limiting part 9.1 has a second magnetic ring 9.3 at one end that can attract the first magnetic ring 8.3, and an annular groove 9.1.1 at the other end. The second limiting part 9.2 has an insertion ring 9.2.1 at its end that can be inserted into the annular groove 9.1.1. A bearing unit 9.4 is installed between the inner circumferential surface of the annular groove 9.1.1 and the inner circumferential surface of the insertion ring 9.2.1. The first limiting part 9.1 has a first channel 9.1.2, and the second limiting part 9.2 has a second channel 9.2.2. The first channel 9.1.2 and the second channel 9.2.2 are joined together to form the frustum-shaped channel. Both ends of the frustum-shaped channel have arc-shaped chamfers. A roller unit is installed at the slider 9.6. The roller unit includes a roller frame 9.7.2, rollers 9.7.1 installed at the roller frame 9.7.2, and two connecting arms 9.7.3 fixedly connected to the roller frame 9.7.2. The connecting arms 9.7.3 are hinged to the slider 9.6. A spring 9.7.4 connects the roller frame 9.7.2 and the slider 9.6.

[0040] The spring wire winding method of the sheath spring wire winding device of this application first locks and fixes the positions of the two first slides; and then installs the whole consisting of the inner tube and the mandrel between the two claw units; then, the first drive unit drives the whole consisting of the inner tube and the mandrel to rotate, while the second drive unit drives the second slide to translate, and the third drive unit drives the wire feeding unit to feed wire, thereby winding the spring wire.

[0041] During the winding process, the laser generator and the light receiver detect the movement of the inner tube and the mandrel. If the movement of the whole does not pass through the optical path of the laser generator and the light receiver (indicating that the movement amplitude of the inner tube is relatively small and no limit is required), the winding operation continues and the electric winding device releases the wire, keeping the slider in place.

[0042] If the shaking of the entire assembly consisting of the inner tube and the mandrel passes through the optical path of the laser generator and the optical receiver (indicating that the shaking amplitude of the inner tube is relatively large; even if the shaking amplitude is relatively large, it can only be detected by the detection unit when the wire feeding unit is close to the middle of the inner tube, and only at this time will the shaking have a significant adverse effect on the winding; because the shaking amplitude at both ends of the inner tube must be relatively small and has little impact on the winding), then the above winding operation can continue without stopping the machine, and the electric winding device will take in the wire, bringing the slider closer to the second slide until the first magnetic ring and the second magnetic ring attract each other; and with the attraction between the first magnetic ring and the second magnetic ring, the subsequent translation of the limiting unit relies on the drive of the second slide to keep the positions of the limiting unit and the wire feeding unit unchanged, thereby making the limiting more stable. Furthermore, the limiting unit moves from the end of the inner tube before the spring wire is wound, so the edge of the frustum-shaped channel of the limiting unit will not contact the spring wire, thus avoiding adverse effects on the already wound spring wire. The frustum-shaped channel is also more compatible with the characteristics of the inner tube, which has a small amplitude of shaking at the end and a large amplitude of shaking in the middle. This is more conducive to gradually constraining the large amplitude of shaking of the inner tube into a small amplitude of shaking. After the first and second magnetic rings attract each other, the inner tube will contact the second limiting part to limit the shaking of the inner tube. The second limiting part can rotate, thereby minimizing the friction between the second limiting part and the inner tube.

[0043] After the winding is completed, remove the inner tube and mandrel that are now complete.

[0044] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. A device for winding sheath spring wire, characterized in that, The system includes a substrate, a first slide rail mounted on the substrate, a second slide rail mounted on the substrate, two first slide blocks mounted on the first slide rail, a second slide block mounted on the second slide rail, and two end plates fixed to the substrate. A first mounting plate is fixed to the first slide block, a rotating shaft is mounted on the first mounting plate, a pawl unit is mounted on the rotating shaft, and the first slide block has a locking bolt capable of locking its position. One of the two first mounting plates has a first drive unit for driving the rotating shaft at that first mounting plate to rotate. A lead screw is mounted between the end plates, and a second drive unit for driving the lead screw is mounted on one of the end plates. The second slide block has a second sliding groove that mates with the second slide rail and a threaded hole that mates with the lead screw. A mounting frame is fixed to the second slide block, and a wire feeding unit and a detection unit are mounted on the mounting frame. The detection unit includes a connecting rod and an annular portion fixedly connected to the connecting rod. A lower protrusion and an upper protrusion are fixed to the annular portion. A laser emitter is mounted on the upper protrusion, and a light receiver is mounted on the lower protrusion. The mounting frame includes a horizontal base plate and a second mounting plate fixedly connected to the horizontal base plate; the connecting rod is fixedly connected to the horizontal base plate; a first magnetic ring is fixed at the annular portion; two mounting blocks are fixed at the base plate, two guide rods are installed between the two mounting blocks, and sliders passing through the two guide rods are installed at the two guide rods. The sliders are connected to a limiting unit through an L-shaped connecting plate; the L-shaped connecting plate has an anchor point, and an electric winding device is installed at the horizontal base plate. The end of the pull rope of the electric winding device is fixedly connected to the anchor point; the limiting unit is cylindrical and has a frustum-shaped channel. The limiting unit includes a first limiting part and a second limiting part. One end of the first limiting part has a second magnetic ring that can attract the first magnetic ring, and the other end has an annular groove. The end of the second limiting part has an insertion ring that can be inserted into the annular groove. A bearing unit is installed between the inner circumferential surface of the annular groove and the inner circumferential surface of the insertion ring. The first limiting part has a first channel, and the second limiting part has a second channel. The first channel and the second channel are spliced ​​together to form the frustum-shaped channel.

2. The sheath spring wire winding device according to claim 1, characterized in that, The wire feeding unit includes a wire feeding reel, a third drive unit for driving the wire feeding reel to rotate, a tension guide roller, a first guide roller, two second guide rollers, a third guide roller, and a fourth guide roller.

3. The sheath spring wire winding device according to claim 1, characterized in that, Both ends of the frustum-shaped channel have curved chamfers.

4. The sheath spring wire winding device according to claim 1, characterized in that, A roller unit is installed at the slider. The roller unit includes a roller frame, a roller installed at the roller frame, and two connecting arms fixedly connected to the roller frame. The connecting arms and the slider are hinged together, and a spring connects the roller frame and the slider.

5. The sheath spring wire winding device according to claim 1, characterized in that, Two locking bolts are installed at each of the first slide blocks, and a knob is installed at each locking bolt.

6. A method for winding spring wire based on the sheath spring wire winding device of claim 1 or 4, characterized in that, Includes the following steps: 1) Lock and fix the positions of the two first slide blocks; 2) Install the inner tube and mandrel as a whole between the two jaw units; 3) The first drive unit drives the inner tube and the mandrel to rotate as a whole, while the second drive unit drives the second slide to translate, and the third drive unit drives the wire feeding unit to feed wire, thereby winding the spring wire. 4) The laser emitter and receiver perform detection. If the shaking of the whole consisting of the inner tube and the mandrel does not pass through the optical path of the laser emitter and the receiver, then continue to step 3) and the electric winding device unwinds the wire, keeping the slider in place; if the shaking of the whole consisting of the inner tube and the mandrel passes through the optical path of the laser emitter and the receiver, then continue to step 3) and the electric winding device winds the wire, bringing the slider closer to the second slide until the first magnetic ring and the second magnetic ring attract each other. 5) After winding is completed, remove the inner tube and mandrel that are now complete.

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