Magnetic resistance type yarn tensioner based on PCB

Abstract

The magnetic resistance type yarn tensioner comprises a left shell, a right shell, a left PCB, a right PCB, a mandrel, a rotor and a yarn holding wheel, the left shell and the right shell are connected in a covering mode, the left PCB and the right PCB which are spaced are installed between the left shell and the right shell, the rotor is arranged between the left PCB and the right PCB, one end of the mandrel is located in the center of the left PCB and the center of the right PCB, and the other end of the mandrel is located in the center of the left PCB and the center of the right PCB. The rotor penetrates through the left shell and the right shell and is rotationally connected with the left shell and the right shell, the center of the rotor is fixedly connected with the mandrel, the rotor can rotate between the left PCB and the right PCB around the axis of the mandrel, and the other end of the mandrel is connected with a wire holding wheel; excitation coils which are annularly distributed around the mandrel are distributed on the left PCB and the right PCB, and the directions of the adjacent excitation coils on the left PCB or the right PCB are opposite. After the coil is electrified, a constant magnetic field is formed between the left PCB and the right PCB, so that the rotor is subjected to constant hysteresis torque in the rotating process, and the torque is transmitted to the wire holding wheel through the mandrel to generate constant and adjustable tension.

Description

Technical Field

[0001] The invention relates to the technical field of yarn tensioners, and in particular to a magnetoresistive yarn tensioner based on a PCB board. Background Art

[0002] In the textile industry, the accuracy and range of yarn tension control is a key indicator to measure the level of the textile industry. Too much yarn tension will cause the yarn to break or cause irreversible damage to the yarn. Too little yarn tension will cause the finished textile product to be loose and difficult to shape. Therefore, the design of the tensioner is crucial.

[0003] The existing tensioners in China are still mainly friction type tensioners, whose tension control mainly relies on the friction force generated when the machine is in direct contact with the yarn as tension control, which causes great damage to the yarn, has low control accuracy, discontinuous control range, high maintenance cost, and is difficult to be compatible with automation and computer control. In addition, as the use time increases, lint will accumulate, resulting in a significant decrease in tension accuracy.

[0004] Therefore, there is an urgent need for a PCB-based magnetoresistive yarn tensioner to solve the problem of low control accuracy of traditional yarn tensioners. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a magnetic resistance yarn tensioner based on a PCB board to solve the problem of low control accuracy of the traditional yarn tensioner.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A magnetic resistance yarn tensioner based on a PCB board, characterized in that it comprises a left shell, a right shell, a left PCB board, a right PCB board, a core shaft, a rotor and a wire holding wheel, the left shell and the right shell are covered and connected, and a left PCB board and a right PCB board with a spacing are installed between them, the rotor is arranged between the left PCB board and the right PCB board, one end of the core shaft is at the center of the left PCB board and the right PCB board, passes through the left shell and the right shell and is rotatably connected, the center of the rotor is fixedly connected to the core shaft, the rotor can rotate around the axis of the core shaft between the left PCB board and the right PCB board, and the other end of the core shaft is connected to a wire holding wheel for yarn winding; a plurality of excitation coils distributed in a ring shape around the core shaft are symmetrically distributed on the left PCB board and the right PCB board, and the adjacent excitation coils on the left PCB board or the right PCB board are in opposite directions.

[0007] To optimize the above technical solutions, the specific measures taken also include: Furthermore, symmetrical annular mounting grooves are respectively provided on opposite surfaces of the left outer shell and the right outer shell, and the left PCB board and the right PCB board are respectively installed in the two annular mounting grooves, and the end of the core shaft passes through the left outer shell and the right outer shell and is rotatably set at the center of the annular mounting groove, and there is a spacing between the left outer shell and the right outer shell for the rotor to connect to the core shaft.

[0008] Furthermore, the end of the core shaft passes through the left outer shell and the right outer shell and is rotatably arranged at the center of the annular mounting groove through a bearing.

[0009] Furthermore, a plurality of mounting holes are provided on the left and right outer shells and located on the outer ring of the annular mounting groove at intervals, and the left and right outer shells are fixed by passing shell bolts through the corresponding mounting holes and cooperating with shell nuts.

[0010] Furthermore, the left PCB board and the right PCB board can be respectively installed in the corresponding annular mounting groove so as to rotate around the center of the annular mounting groove, and a plurality of holes are provided on the left PCB board and the right PCB board around the center of the annular mounting groove, and limiting holes are provided on the left shell and the right shell corresponding to the holes, and the left shell, the left PCB board, the right PCB board and the right shell are connected in a limited manner by PCB bolts passing through the corresponding limiting holes and holes in sequence.

[0011] Furthermore, the holes are arranged in an array in an arc shape around the center of the annular mounting groove, the spacing and angle between each group of holes are the same, and the distance from the center of the annular mounting groove is equal, and each group of holes corresponds to one of the limit holes.

[0012] Furthermore, it also includes a gasket, the center of which can allow the PCB bolt to pass through, the gasket is arranged between the left PCB board and the right PCB board, and the gasket is sleeved on the PCB bolt.

[0013] Furthermore, the distance between the gasket and the core shaft is greater than the diameter of the rotor.

[0014] Furthermore, the excitation coil is provided with several layers.

[0015] Furthermore, guide holes are reserved on the left shell and the right shell, and the guide holes can be used for the excitation coil to be connected to an external power supply wire to provide current.

[0016] The beneficial effects of the present invention are: The present invention adopts the layout design of the excitation coils on the left PCB board and the right PCB board. Since the left PCB board and the right PCB board are both distributed with a plurality of annular excitation coils, an annular current will be formed on the coil after power is turned on. Under the action of the annular current, the adjacent coils will form magnetic poles with opposite directions. Under the action of the magnetic poles, a constant magnetic field will be formed between the left PCB board and the right PCB board, so that when the yarn is wound on the wire holding wheel and drives the core shaft and the rotor to rotate, it will be subjected to a hysteresis torque of constant magnitude. The torque will be transmitted to the wire holding wheel through the core shaft to generate a tension of constant magnitude. The magnitude of the final tension can be controlled by changing the magnitude of the current, and the magnitude of the magnetic declination can be changed by rotating the angle between the left PCB board and the right PCB board to obtain tension control ranges and accuracies of different ranges.

[0017] The present invention uses a left PCB board, a right PCB board and the excitation coil thereon to replace the stator and coil in a traditional electromagnetic tensioner, which not only greatly reduces the weight and volume of the tensioner, but also improves the utilization rate of the magnetic field generated by the coil, making assembly more convenient.

[0018] The present invention can not only accurately and continuously control the yarn tension, but is also compatible with automated control and can adapt to tension range requirements in different ranges. It has low repair and maintenance costs, strong anti-interference ability, simple structure, and is easy to use and promote. It solves the problems of low control accuracy, large size, heavy weight, and low degree of automation of traditional yarn tensioners. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of the overall structure of a PCB-based magnetoresistive yarn tensioner proposed by the present invention; Figure 2 This is a schematic diagram of the structure explosion of a PCB-based magnetoresistive yarn tensioner proposed by the present invention; Figure 3 This is a schematic structural diagram of the right housing of a PCB-based magnetoresistive yarn tensioner proposed by the present invention; Figure 4 This is a schematic structural diagram of a right PCB board of a PCB-based magnetoresistive yarn tensioner proposed by the present invention; Figure 5 This is a schematic diagram of the magnetic circuit direction of a PCB-based magnetoresistive yarn tensioner proposed in the present invention.

[0020] Figure numerals: 1. housing nut, 2. PCB nut, 3. left housing, 4. left PCB board, 5. bearing, 6. rotor, 7. right PCB board, 8. wire holding wheel, 9. core shaft, 10. right housing, 11. PCB bolt, 12. gasket, 13. housing bolt, 14. guide hole. DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 4 and attached Figure 5 As shown, a magnetic resistance yarn tensioner based on a PCB board according to an embodiment of the present invention comprises a left shell 3, a right shell 10, a left PCB board 4, a right PCB board 7, a core shaft 9, a rotor 6 and a wire holding wheel 8. The left shell 3 and the right shell 10 are covered and connected, and the left PCB board 4 and the right PCB board 7 with a spacing are installed therebetween. The rotor 6 is arranged between the left PCB board 4 and the right PCB board 7. One end of the core shaft 9 is at the center of the left PCB board 4 and the right PCB board 7, passes through the left shell 3 and the right shell 10 and is rotatably connected. The center of the rotor 6 is fixedly connected to the core shaft 9, and the rotor 6 can rotate between the left PCB board 4 and the right PCB board 7 around the axis of the core shaft 9. The other end of the core shaft 9 is connected to the wire holding wheel 8 for yarn winding; a plurality of annular excitation coils distributed in annular shapes around the core shaft 9 are symmetrically distributed on the left PCB board 4 and the right PCB board 7, and the adjacent excitation coils on the left PCB board 4 or the right PCB board 7 are in opposite directions.

[0023] The present invention adopts the layout design of the excitation coils on the left PCB board 4 and the right PCB board 7. Since the left PCB board 4 and the right PCB board 7 are both provided with a plurality of annular excitation coils, an annular current will be formed on the coils after power is turned on. Under the action of the annular current, the adjacent coils will form magnetic poles in opposite directions. Under the action of the magnetic poles, a magnetic field as shown in the figure below will be formed between the left PCB board 4 and the right PCB board 7. Figure 5 The constant magnetic field shown in the figure causes the yarn to be subjected to a constant hysteresis torque when it is wound on the holding wheel 8 and drives the core shaft 9 and the rotor 6 to rotate. The torque is transmitted to the holding wheel 8 through the core shaft 9, thereby generating a constant tension. The final tension can be controlled by changing the current, and the magnetic declination can be changed by rotating the angle between the left PCB board 4 and the right PCB board 7 to obtain different tension control ranges and accuracies.

[0024] The present invention uses the left PCB board 4, the right PCB board 7 and the excitation coil thereon to replace the stator and coil in the traditional electromagnetic tensioner, which not only greatly reduces the weight and volume of the tensioner, but also improves the utilization rate of the magnetic field generated by the coil, making assembly more convenient.

[0025] The present invention can not only accurately and continuously control the yarn tension, but is also compatible with automated control and can adapt to tension range requirements in different ranges. It has low repair and maintenance costs, strong anti-interference ability, simple structure, and is easy to use and promote. It solves the problems of low control accuracy, large size, heavy weight, and low degree of automation of traditional yarn tensioners.

[0026] In this solution, a step for positioning can be provided on the core shaft 9 so that the distances between the left PCB board 4 and the right PCB board 7 and the rotor 6 are the same, wherein the wire holding wheel 8 and the core shaft 9 can be friction-fitted, the left outer shell 3 and the right outer shell 10 are of the same outer shell model, and the left PCB board 4 and the right PCB board 7 are of the same outer shell model.

[0027] As attached Figure 3 As shown, in a further specific embodiment based on the above, symmetrical annular mounting grooves are respectively provided on the opposite surfaces of the left housing 3 and the right housing 10, and the left PCB board 4 and the right PCB board 7 are respectively installed in the two annular mounting grooves, and the end of the mandrel 9 passes through the left housing 3 and the right housing 10 and is rotatably arranged at the center of the annular mounting grooves, and there is a gap between the left housing 3 and the right housing 10 for the rotor 6 to connect to the mandrel 9. In this way, the disassembly and assembly of the left PCB board 4 and the right PCB board 7 are facilitated.

[0028] In a further specific embodiment based on the above, the end of the core shaft 9 passes through the left housing 3 and the right housing 10 and is rotatably arranged at the center of the annular mounting groove through the bearing 5 .

[0029] Among them, in a further specific embodiment based on the above, a plurality of mounting holes are provided at intervals on the outer ring of the annular mounting groove on the left housing 3 and the right housing 10, and the left housing 3 and the right housing 10 are fixed by passing the housing bolts 13 through the corresponding mounting holes and cooperating with the housing nuts 1. In this way, the disassembly and assembly of the left housing 3 and the right housing 10 are facilitated. In this embodiment, the left housing 3 and the right housing 10 can also be fixed to other yarn supports by the housing bolts 13 cooperating with the housing nuts 1.

[0030] Among them, in a further specific embodiment based on the above, the left PCB board 4 and the right PCB board 7 can be respectively installed in the corresponding annular installation groove by rotating around the center of the annular installation groove, and a plurality of holes are opened on the left PCB board 4 and the right PCB board 7 around the center of the annular installation groove, and the corresponding holes are opened on the left shell 3 and the right shell 10. The PCB bolts 11 pass through the corresponding limiting holes and holes in sequence to perform limiting connection between the left shell 3, the left PCB board 4, the right PCB board 7 and the right shell 10. In this way, when in use, it is convenient to adjust the required tension control range by rotating the corresponding left PCB board 4 or right PCB board 7 to change the angle of the left PCB board 4 or the right PCB board 7 to adjust the size of the magnetic declination, and control the posture of the left PCB board 4 and the right PCB board 7 through the PCB bolts 11 and the PCB nuts 2. Specifically, when in use, the left shell 3 and the right shell 10 can be disassembled first, and after adjustment, the limiting installation can be performed.

[0031] Among them, in a further specific embodiment based on the above, the holes are arranged in an array in an arc shape around the center of the annular installation groove, the spacing and angle between each group of holes are the same, and the distance from the center of the annular installation groove is equal, and each group of holes is correspondingly provided with a limit hole. When in use, the hole at the desired position is rotated to align with the corresponding limit hole.

[0032] In a further specific embodiment based on the above, a gasket 12 is further included, the center of the gasket 12 is provided for the PCB bolt 11 to pass through, the gasket 12 is arranged between the left PCB board 4 and the right PCB board 7, and the gasket 12 is sleeved on the PCB bolt 11. In this way, the distance between the left PCB board 4 and the right PCB board 7 can be ensured by the gasket 12. When in use, the distance between the left PCB board 4 and the right PCB board 7 and the rotor 6 can be adjusted by changing the thickness of the gasket 12 and matching the depth of the annular mounting groove.

[0033] In a further specific embodiment based on the above, the distance between the gasket 12 and the core shaft 9 is greater than the diameter of the rotor 6 .

[0034] In a further specific embodiment based on the above, the excitation coil is provided with several layers as required.

[0035] In a further specific embodiment based on the above, guide holes 14 are left on the left shell 3 and the right shell 10, and the guide holes 14 can provide current for the external power wire of the excitation coil, and the power supply outputs a current of a specific size to the two PCB boards through the wires.

[0036] In the above solution, the structures of the left housing 3 and the right housing 10 can be symmetrical with each other and have the same thickness, and the structures of the left PCB board 4 and the right PCB board 7 can be symmetrical with each other and have the same thickness.

[0037] The method of using the device of the present invention is as follows: The PCB board 4 and the right PCB board 7 are connected to the external power supply through electric wires through the guide hole 14. When the power is on, the coils on the PCB board 4 and the right PCB board 7 will form corresponding magnetic poles, and a constant magnetic field will be formed between the PCB board 4 and the right PCB board 7 through the corresponding magnetic pole distribution. The rotor 6 rotates in the magnetic field to form a hysteresis torque of constant magnitude, which is transmitted to the wire holding wheel 8 through the core shaft 9 to form a tension of corresponding magnitude. The magnetic declination between the coils can be changed by rotating the relative angle between the PCB board 4 and the right PCB board 7, thereby generating different magnetic field distributions and hysteresis torques, thereby obtaining tension control ranges of different ranges.

[0038] The magnitude of the tension can also be controlled by changing the magnitude of the power supply current. The greater the current, the greater the final tension. The magnitude of the tension can also be controlled by adjusting the thickness of the gasket 12, etc. For example, the closer the distance between the PCB board 4 and the right PCB board 7 and the rotor 6 is, the greater the final tension will be. The magnitude of the tension can also be controlled by changing the thickness of the rotor 6. Within a certain range, the thicker the rotor 6, the greater the tension.

[0039] Among them, a relatively stable hysteresis torque can be obtained through the relevant parameters of the rotor 6, the PCB board 4, and the right PCB board 7 to provide stable tension for the yarn, which not only solves the problems of low tension control accuracy and discontinuous control range of traditional tensioners, but also effectively reduces the volume, weight and cost of traditional tensioners. At the same time, it is compatible with automation and computer control, and meets the future textile industry's requirements for precise control of yarn tension.

[0040] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. cited in the invention are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0041] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A magnetic resistance yarn tensioner based on a PCB board, characterized in that: The invention comprises a left shell (3), a right shell (10), a left PCB board (4), a right PCB board (7), a core shaft (9), a rotor (6) and a wire holding wheel (8); the left shell (3) and the right shell (10) are covered and connected, and a left PCB board (4) and a right PCB board (7) are installed therebetween with a gap; the rotor (6) is arranged between the left PCB board (4) and the right PCB board (7); one end of the core shaft (9) is located at the center of the left PCB board (4) and the right PCB board (7), and penetrates the left shell (8). 3) and the right housing (10) are rotatably connected, the center of the rotor (6) is fixedly connected to the core shaft (9), the rotor (6) can rotate around the axis of the core shaft (9) between the left PCB board (4) and the right PCB board (7), and the other end of the core shaft (9) is connected to a wire holding wheel (8) for winding the yarn; a plurality of excitation coils are symmetrically distributed on the left PCB board (4) and the right PCB board (7) and are distributed in a ring shape around the core shaft (9), and adjacent excitation coils on the left PCB board (4) or the right PCB board (7) are in opposite directions.

2. The PCB-based magnetic resistance yarn tensioner according to claim 1, characterized in that: Symmetrical annular mounting grooves are respectively provided on the opposite surfaces of the left housing (3) and the right housing (10); the left PCB board (4) and the right PCB board (7) are respectively mounted in the two annular mounting grooves; the end of the core shaft (9) passes through the left housing (3) and the right housing (10) and is rotatably arranged at the center of the annular mounting groove; and there is a spacing between the left housing (3) and the right housing (10) for the rotor (6) to connect to the core shaft (9).

3. The PCB-based magnetic resistance yarn tensioner according to claim 2, characterized in that: The end of the core shaft (9) passes through the left housing (3) and the right housing (10) and is rotatably arranged at the center of the annular mounting groove via a bearing (5).

4. The PCB-based magnetic resistance yarn tensioner according to claim 2, characterized in that: A plurality of mounting holes are provided on the left housing (3) and the right housing (10) and are located on the outer ring of the annular mounting groove at intervals. The left housing (3) and the right housing (10) are fixed by housing bolts (13) passing through the corresponding mounting holes and cooperating with housing nuts (1).

5. The PCB-based magnetic resistance yarn tensioner according to claim 2, characterized in that: The left PCB board (4) and the right PCB board (7) are respectively rotatably mounted in the corresponding annular mounting grooves around the center of the annular mounting grooves, and the left PCB board (4) and the right PCB board (7) are both provided with a plurality of holes around the center of the annular mounting grooves, and the left housing (3) and the right housing (10) are provided with limiting holes corresponding to the holes, and the left housing (3), the left PCB board (4), the right PCB board (7) and the right housing (10) are connected to each other by PCB bolts (11) passing through the corresponding limiting holes and holes in sequence.

6. The PCB-based magnetic resistance yarn tensioner according to claim 5, characterized in that: The holes are arranged in an array in an arc shape around the center of the annular installation groove, the spacing and angle between each group of holes are the same, and the distance from the center of the annular installation groove is equal, and each group of holes corresponds to one of the limit holes.

7. The PCB-based magnetic resistance yarn tensioner according to claim 5, characterized in that: It also comprises a gasket (12), the center of which can allow the PCB bolt (11) to pass through, the gasket (12) is arranged between the left PCB board (4) and the right PCB board (7), and the gasket (12) is sleeved on the PCB bolt (11).

8. The PCB-based magnetic resistance yarn tensioner according to claim 7, characterized in that: The distance between the gasket (12) and the core shaft (9) is greater than the diameter of the rotor (6).

9. The PCB-based magnetic resistance yarn tensioner according to claim 1, characterized in that: The excitation coil is provided with several layers.

10. The PCB-based magnetoresistive yarn tensioner according to claim 1, characterized in that: A guide hole (14) is provided on both the left housing (3) and the right housing (10), and the guide hole (14) can be used for the excitation coil to be connected to an external power supply wire to provide current.

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