A high performance motor structure for driving a sewing machine

Abstract

The present invention relates to a high-performance motor structure for driving a sewing machine applied in the field of motors. When the driving shaft is entangled with miscellaneous threads, the shaft detection module is squeezed, thereby moving toward and colliding with an external pressure sensor, causing it to generate force data, thereby triggering an alarm. Compared with the prior art, the situation of being wound with miscellaneous threads can be detected before a significant impact is caused on the motor, which is convenient for timely maintenance and reduces the loss of the motor. In addition, with the setting of a follow-up package, when the driving shaft rotates at a high speed, a large centrifugal force is generated, causing the internal pressure sensor to be squeezed by pure water. After being wound with miscellaneous threads, the rotation of the driving shaft is inhibited to a certain extent, resulting in unstable or reduced centrifugal force, thereby causing the internal pressure sensor to generate obvious data fluctuations, which can further improve the accuracy of the monitoring result of whether the miscellaneous threads are wound on the driving shaft, so that the performance of the motor body is not easily affected.

Description

Technical Field

[0001] The present invention relates to a high-performance motor structure for driving a sewing machine, and in particular to a high-performance motor structure for driving a sewing machine applied in the motor field. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing material are interwoven or sewn together. A motor is a device that converts electrical energy into mechanical energy. It uses an energized coil (that is, a stator winding) to generate a rotating magnetic field and act on the rotor to form a magneto-electrical power rotation torque. The motor is mainly composed of a stator and a rotor. The direction of the force movement of the energized wire in the magnetic field is related to the direction of the current and the direction of the magnetic flux lines (magnetic field direction). The working principle of the motor is that the magnetic field acts on the force of the current to make the motor rotate. Sewing machines are generally driven by motors.

[0003] Due to the special use environment of the sewing machine with multiple fibers and multiple miscellaneous threads, the motor used to drive the sewing machine is prone to be entangled with miscellaneous threads on the drive shaft during operation, affecting the normal rotation of the motor. In severe cases, the motor may even be burned out. In the prior art, it is difficult to detect the winding of the motor drive shaft in time, and it is often discovered only after a relatively serious impact has already occurred on the motor, affecting the performance of the motor. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the motor drive shaft is easily entangled with miscellaneous wires and it is difficult to detect it in time.

[0005] To solve the above problems, the present invention provides a high-performance motor structure for driving a sewing machine, including a motor body with a control center and an alarm, the alarm is connected to the control center signal, the drive shaft is connected to the drive shaft, two limit rings are fixedly connected to the outer end of the drive shaft, a monitoring sleeve is provided between the two limit rings, the monitoring sleeve is arranged outside the drive shaft, and a plurality of shaft detection modules are provided on the monitoring sleeve, the shaft detection module includes a plurality of follow-up dynamic packages respectively fixedly connected to the outside of the monitoring sleeve, a plurality of monitoring holes drilled on the drive shaft, and a central reinforcement shaft fixedly embedded in the drive shaft, the plurality of central reinforcement shafts respectively correspond to the plurality of follow-up dynamic packages, and a plurality of external pressure sensors corresponding to the monitoring holes are installed on the outer end of the central reinforcement shaft, the external pressure sensor is coaxially arranged with the monitoring hole, and the external pressure sensor is connected to the control center signal.

[0006] In the above-mentioned high-performance motor structure for driving a sewing machine, by monitoring the setting of the sheath and the shaft detection module thereon, when the driving shaft is entangled with stray wires, the shaft detection module is squeezed, thereby moving toward the external pressure sensor and colliding with it, causing it to generate force data, thereby triggering an alarm. Compared with the prior art, the situation of stray wires being wound can be detected before it has a significant impact on the motor, thereby facilitating timely maintenance and reducing losses to the motor.

[0007] As a further improvement of the present application, the follow-up package includes an outer bulge and a monitoring column fixedly connected to one end of the outer bulge facing the monitoring hole, the end of the monitoring column extends into the monitoring hole and faces the external pressure sensor, and the monitoring column does not contact the external pressure sensor.

[0008] As a further improvement of the present application, the monitoring sleeve is completely attached to the surface of the drive shaft, and the outer bulge is an arc-shaped elastic structure that bulges outward.

[0009] As a further improvement of the present application, multiple monitoring holes are distributed along a spiral path on the surface of the drive shaft, and two adjacent monitoring holes are staggered in the three axes of X, Y, and Z, and the length of the central reinforcement shaft is greater than the distribution span of the multiple monitoring holes.

[0010] As another improvement of the present application, a water storage chamber, a reduced diameter hole and a monitoring chamber are successively excavated inside the monitoring column along the direction away from the central reinforcement axis, a centrifugal moving diaphragm is fixedly connected to the inner wall of the monitoring chamber, an internal pressure sensor is installed on the inner wall of the monitoring chamber away from the reduced diameter hole, and the internal pressure sensor is connected to the control center signal.

[0011] As another improved supplement of the present application, the inner diameters of the water storage cavity and the monitoring cavity are kept consistent, the inner diameter of the reduced diameter hole is smaller than the inner diameter of the monitoring cavity, and the inner diameter of the monitoring cavity is 2-3 times the inner diameter of the reduced diameter hole.

[0012] As another improvement supplement of the present application, the centrifugal moving diaphragm does not contact the internal pressure sensor, and the space surrounded by the water storage chamber, the reduced diameter hole and the centrifugal moving diaphragm is filled with pure water, and the filling amount of pure water is not less than 2 / 3 of the volume of the water storage chamber.

[0013] In summary, by monitoring the setting of the sheath and the shaft detection module thereon, when the driving shaft is entangled with stray wires, the shaft detection module is squeezed, thereby moving toward the external pressure sensor and colliding with it, causing it to generate force data, thereby triggering the alarm. Compared with the prior art, the situation of being wound with stray wires can be detected before it has a significant impact on the motor, which is convenient for timely maintenance and reduces the loss to the motor; in addition, with the setting of the follow-up dynamic package, when the driving shaft rotates at high speed, a large centrifugal force will be generated, causing the internal pressure sensor to be squeezed by pure water, and after being entangled with stray wires, the rotation of the driving shaft will be inhibited to a certain extent, resulting in unstable or reduced centrifugal force, and then causing the internal pressure sensor to produce obvious data fluctuations, which can further improve the accuracy of the monitoring results of whether stray wires are wound around the driving shaft, so that the performance of the motor body is not easily affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of the first embodiment of the present application;

[0015] Figure 2 A three-dimensional diagram of a drive shaft according to a first embodiment of the present application;

[0016] Figure 3 A half-cutaway perspective view of a drive shaft according to a first embodiment of the present application;

[0017] Figure 4 This is a cross-sectional view of a drive shaft according to a first embodiment of the present application;

[0018] Figure 5 for Figure 4 Schematic diagram at A in the middle;

[0019] Figure 6 This is a schematic diagram of point A when the drive shaft rotates in the second embodiment of the present application;

[0020] Figure 7 This is a schematic diagram of a monitoring column when the driving shaft of the second embodiment of the present application rotates normally;

[0021] Figure 8 This is the main principle block diagram of the second implementation method of this application.

[0022] Description of the numbers in the figure:

[0023] 1 motor body, 2 drive shaft, 201 center reinforcement shaft, 202 monitoring hole, 3 monitoring sleeve, 4 limit ring, 5 linear dynamic package, 51 outer bulge, 501 water storage cavity, 502 reduced diameter hole, 503 monitoring cavity, 52 monitoring column, 61 external pressure sensor, 62 internal pressure sensor, 7 centrifugal dynamic diaphragm. DETAILED DESCRIPTION

[0024] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0025] The first implementation method:

[0026] Figure 1 and Figure 2 Shown is a high-performance motor structure for driving a sewing machine, including a motor body 1 with a control center and an alarm, the alarm is connected to the control center signal, a drive shaft 2 is connected to the drive shaft 2, the outer end of the drive shaft 2 is fixedly connected to two limit rings 4, a monitoring sheath 3 is provided between the two limit rings 4, the monitoring sheath 3 is sleeved on the outside of the drive shaft 2, and a plurality of shaft detection modules are provided on the monitoring sheath 3.

[0027] like Figure 3-4 The shaft detection module includes a plurality of follow-up moving bags 5 respectively fixedly connected to the outside of the monitoring sheath 3, a plurality of monitoring holes 202 drilled on the driving shaft 2, and a central reinforcement shaft 201 fixedly embedded in the driving shaft 2. The plurality of central reinforcement shafts 201 correspond to the plurality of follow-up moving bags 5 respectively. The outer end of the central reinforcement shaft 201 is provided with a plurality of external pressure sensors 61 respectively corresponding to the monitoring holes 202. The external pressure sensor 61 is coaxially arranged with the monitoring holes 202, and the external pressure sensor 61 is connected with the control center signal. When the driving shaft 2 rotates normally to drive the sewing machine, the follow-up moving bag 5 is in the original state, and even under the action of the centrifugal force during rotation, the follow-up moving bag 5 is in the original state. The package 5 is not easy to move toward the side of the drive shaft 2. At this time, the external pressure sensor 61 is not squeezed by the moving package 5, is not subjected to force, and does not generate force data. When the miscellaneous wires are entangled, the entangled impurities are tightly attached to the outside of the drive shaft 2, which will produce an extrusion force on the moving package 5, causing it to deform toward the side of the drive shaft 2, and then cause it to resist the external pressure sensor 61, causing the external pressure sensor 61 to generate force data. At this time, after the control center receives the signal, it controls the alarm to sound an alarm, so that the staff can promptly detect the abnormality of the miscellaneous wires wound on the drive shaft 2. Compared with the existing technology, the influence of the miscellaneous wires wound on the drive shaft 2 on the performance of the motor body 1 is greatly reduced.

[0028] The follow-up dynamic package 5 includes an outer bulge 51 and a monitoring column 52 fixedly connected to one end of the outer bulge 51 facing the monitoring hole 202, the end of the monitoring column 52 extends into the monitoring hole 202 and is directly facing the external pressure sensor 61, and the monitoring column 52 does not contact the external pressure sensor 61, the monitoring sheath 3 is completely attached to the surface of the driving shaft 2, and the outer bulge 51 is an arc-shaped elastic structure bulging outward.

[0029] A plurality of monitoring holes 202 are distributed along a spiral path on the surface of the drive shaft 2, so that the distribution range of the monitoring holes 202 is relatively large, so that the monitoring of whether the outside of the drive shaft 2 is accidentally entangled with miscellaneous wires is relatively comprehensive, and two adjacent monitoring holes 202 are staggered in the three axes of X, Y, and Z. The length of the central reinforcement shaft 201 is greater than the distribution span of the plurality of monitoring holes 202, so that the central axes of the two monitoring holes 202 will not be located on the same straight line, effectively ensuring that the two monitoring holes 202 will not be opposite to each other, and thereby preventing the setting of the monitoring holes 202 from having too great an impact on the strength of the drive shaft 2.

[0030] In the above-mentioned high-performance motor structure for driving a sewing machine, by monitoring the sheath 3 and the setting of the shaft detection module thereon, when the driving shaft 2 is entangled with stray wires, the shaft detection module is squeezed, thereby moving toward the external pressure sensor 61 and colliding with it, causing it to generate force data, thereby triggering an alarm. Compared with the prior art, the situation of stray wires being wound can be detected before it has a significant impact on the motor, which facilitates timely maintenance and reduces the loss of the motor.

[0031] The second implementation method:

[0032] This embodiment further improves the line-following dynamic package 5 on the basis of the first embodiment, and the rest of the parts are consistent with the first embodiment.

[0033] Figure 5 and Figure 7 It is shown that, along the direction away from the central reinforcement axis 201, a water storage chamber 501, a reduced diameter hole 502 and a monitoring chamber 503 are sequentially excavated inside the monitoring column 52, a centrifugal moving diaphragm 7 is fixedly connected to the inner wall of the monitoring chamber 503, an internal pressure sensor 62 is installed on the inner wall of the monitoring chamber 503 away from the reduced diameter hole 502, and the internal pressure sensor 62 is connected to the control center signal, the inner diameters of the water storage chamber 501 and the monitoring chamber 503 are consistent, the inner diameter of the reduced diameter hole 502 is smaller than the inner diameter of the monitoring chamber 503, and the inner diameter of the monitoring chamber 503 is 2-3 times the inner diameter of the reduced diameter hole 502. When the pure water moves toward the monitoring cavity 503 under the action of centrifugal force, it will pass through the reduced diameter hole 502 with a smaller inner diameter, so that its speed and pressure can be improved to a certain extent, thereby having a better impact effect on the centrifugal moving diaphragm 7, effectively ensuring that the internal pressure sensor 62 can be squeezed; the centrifugal moving diaphragm 7 does not contact the internal pressure sensor 62, and the space surrounded by the water storage cavity 501, the reduced diameter hole 502 and the centrifugal moving diaphragm 7 is filled with pure water, and the filling amount of pure water is not less than 2 / 3 of the volume of the water storage cavity 501, effectively ensuring that the filling amount of pure water is not too small, such as Figure 7 When the driving shaft 2 rotates, the pure water is subjected to the centrifugal force and can produce sufficient impact on the centrifugal moving diaphragm 7, causing the centrifugal moving diaphragm 7 to deform and squeeze the internal pressure sensor 62, causing it to generate pressure data.

[0034] When the wire is entangled on the drive shaft 2, the winding will have a certain impact on the rotation speed of the drive shaft 2, causing the rotation speed of the drive shaft 2 to fluctuate continuously compared with the normal rotation speed, or even become significantly smaller. The centrifugal force generated at this time will fluctuate or decrease accordingly, which may affect the deformation amplitude of the centrifugal moving diaphragm 7 and cause the force data generated by the internal pressure sensor 62 to fluctuate significantly. At this time, the control center can feed back the signal to the alarm to issue an alarm, so that the staff can detect the abnormality in time and perform maintenance, thereby effectively reducing the impact on the performance of the motor body 1.

[0035] Compared with the first embodiment, this embodiment adopts both the external pressure sensor 61 and the internal pressure sensor 62 to perform dual monitoring of the drive shaft 2, thereby effectively improving the accuracy of the monitoring results and better protecting the motor performance.

[0036] In summary, if Figure 8 By monitoring the setting of the sheath 3 and the shaft detection module thereon, when the driving shaft 2 is entangled with stray wires, the shaft detection module is squeezed, thereby moving toward the external pressure sensor 61 and colliding with it, causing it to generate force data, thereby triggering the alarm. Compared with the prior art, the situation of being wound with stray wires can be detected before it has a significant impact on the motor, which is convenient for timely maintenance and reduces the loss to the motor; in addition, in conjunction with the setting of the follow-up dynamic package 5, when the driving shaft 2 rotates at high speed, a large centrifugal force will be generated, causing the internal pressure sensor 62 to be squeezed by pure water, and after being entangled with stray wires, the rotation of the driving shaft 2 will be inhibited to a certain extent, resulting in unstable or reduced centrifugal force, and then causing the internal pressure sensor 62 to produce obvious data fluctuations, which can further improve the accuracy of the monitoring results of whether stray wires are wound around the driving shaft 2, so that the performance of the motor body 1 is not easily affected.

[0037] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A high-performance motor structure for driving a sewing machine, characterized in that: The invention comprises a motor body (1) with a control center and an alarm, wherein the alarm is connected to the control center by signal, the motor body (1) is connected to a drive shaft (2), the outer end of the drive shaft (2) is fixedly connected to two limit rings (4), a monitoring sheath (3) is provided between the two limit rings (4), the monitoring sheath (3) is sleeved outside the drive shaft (2), a plurality of shaft detection modules are provided on the monitoring sheath (3), and the shaft detection modules include a plurality of linear dynamic detection modules respectively fixedly connected to the outside of the monitoring sheath (3). A bag (5), a plurality of monitoring holes (202) bored on the drive shaft (2), and a central reinforcement shaft (201) fixedly embedded in the drive shaft (2), the plurality of central reinforcement shafts (201) respectively corresponding to the plurality of follow-up bags (5), the outer end of the central reinforcement shaft (201) being provided with a plurality of external pressure sensors (61) respectively corresponding to the monitoring holes (202), the external pressure sensor (61) being coaxially arranged with the monitoring hole (202), and the external pressure sensor (61) being connected to a control center signal; The following line dynamic package (5) comprises an outer bulge (51) and a monitoring column (52) fixedly connected to one end of the outer bulge (51) facing the monitoring hole (202), the end of the monitoring column (52) extending into the monitoring hole (202) and facing the external pressure sensor (61), and the monitoring column (52) does not contact the external pressure sensor (61), and along the direction away from the central reinforcement axis (201), the inside of the monitoring column (52) is successively excavated with a water storage cavity (501), a reduced diameter hole (502) and a monitoring cavity (503), the inner wall of the monitoring cavity (503) is fixedly connected with a centrifugal dynamic diaphragm (7), the inner wall of the monitoring cavity (503) away from the reduced diameter hole (502) is installed with an internal pressure sensor (62), and the internal pressure sensor (62) is connected to the control center signal; The monitoring sheath (3) is completely attached to the surface of the drive shaft (2); the outer bulge (51) is an arc-shaped elastic structure that bulges outward; the plurality of monitoring holes (202) are distributed along a spiral path on the surface of the drive shaft (2), and two adjacent monitoring holes (202) are staggered; the length of the central reinforcement shaft (201) is greater than the distribution span of the plurality of monitoring holes (202); the inner diameters of the water storage chamber (501) and the monitoring chamber (503) are consistent; the inner diameter of the monitoring chamber (503) is 2-3 times the inner diameter of the reduced diameter hole (502); the centrifugal moving diaphragm (7) is not in contact with the internal pressure sensor (62); and the space enclosed by the water storage chamber (501), the reduced diameter hole (502) and the centrifugal moving diaphragm (7) is filled with pure water, and the filling amount of the pure water is not less than 2 / 3 of the volume of the water storage chamber (501).

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