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CN-121983455-A - Control switch and yarn guiding device

CN121983455ACN 121983455 ACN121983455 ACN 121983455ACN-121983455-A

Abstract

The invention belongs to the technical field of textile machinery and provides a control switch and a yarn guide device, wherein the control switch comprises a contact switch for controlling the power on and the power off of a driving device, a switch rotating shaft which acts on the contact switch, the switch rotating shaft rotates to form a first rotating position for the power on of the driving device and a second rotating position for the power off of the driving device, a pretensioner which is coupled with the switch rotating shaft and is axially connected with a driving arm of the switch rotating shaft, and the pretensioner applies torsion force for driving the switch rotating shaft to rotate from the first rotating position to the second rotating position to the driving arm and enables the switch rotating shaft to be kept at the second rotating position. The invention solves the problem of unclear state indication of the existing yarn guide device, and can cut off the power supply of the driving device in time when abnormality occurs, thereby preventing overload of the driving device.

Inventors

  • ZENG RONG

Assignees

  • 江苏普来得科技发展有限公司

Dates

Publication Date
20260505
Application Date
20260407

Claims (13)

  1. 1. A control switch for a yarn guiding device in a textile machine, the yarn guiding device comprising a delivery roller and a driving device for driving the delivery roller, characterized in that the control switch comprises: the contact switch is used for controlling the power on and the power off of the driving device; the switch rotating shaft acts on the contact switch, and the switch rotating shaft rotates to form a first rotating position at which the power supply of the driving device is turned on and a second rotating position at which the power supply of the driving device is turned off; a pretension coupled to the switch shaft; the driving arm is axially connected to the switch rotating shaft; The pretensioner applies a torsion force to the driving arm that drives the switch shaft to rotate from the first rotational position to the second rotational position, and holds the switch shaft in the second rotational position.
  2. 2. The control switch according to claim 1, further comprising a housing and a limiting assembly, wherein the limiting assembly comprises a first elastic element and a limiting member, two free ends of the first elastic element are respectively abutted against the limiting member and the housing, and the switch rotating shaft forms a limiting groove for movably limiting the limiting member; The switch rotating shaft is in a first rotating position through the combined action of the limiting piece and the limiting groove.
  3. 3. The control switch of claim 2, wherein the switch shaft has a first cam that is held against the stopper during rotation, the housing forming a stopper holding chamber that accommodates the first elastic member; The outer edge profile of the first cam comprises a limiting surface forming the limiting groove and a rotating surface concavely arranged relative to the limiting surface facing the switch rotating shaft; When the switch rotating shaft is switched between the first rotating position and the second rotating position, the limiting piece is kept against the outer edge contour of the first cam and slides between the limiting surface and the rotating surface.
  4. 4. A control switch according to claim 3, wherein the rotary surface comprises a sliding surface and a guiding surface adjacent to the limiting surface, the sliding surface and the limiting surface forming a abrupt transition through the guiding surface, or The rotating surface comprises a sliding surface and a transition surface close to the limiting surface, and continuous natural transition is formed between the limiting surface and the sliding surface through the transition surface.
  5. 5. The control switch according to claim 4, wherein the housing includes a first housing, a third housing, and an end plate that are movably fastened, the switch shaft extends out from the end plate, the end plate is provided with a protruding portion that forms the limit holding cavity, and the protruding portion forms a first stop portion and a second stop portion on both sides of the limit holding cavity, respectively; a first propping surface movably propping against the first stopping part is formed on one side of the limiting surface far away from the rotating surface, and a second propping surface movably propping against the second stopping part is formed on one side of the rotating surface far away from the limiting surface; The first abutting surface abuts against the first stop part when the switch rotating shaft is at the first rotating position, and the second abutting surface abuts against the second stop part when the switch rotating shaft is at the second rotating position.
  6. 6. The control switch of claim 5, wherein the first cam forms a radial projection, the end plate forms a relief cavity in communication with the limit retainer cavity, and the relief cavity has a thickness along the first axis that is greater than a thickness of the radial projection along the first axis.
  7. 7. The control switch of claim 2, wherein the pretensioning member is configured as a torsion spring, the housing forms an abutment that remains relatively fixed with one free end of the torsion spring that is relatively fixed with the drive arm, and wherein the torsion spring applies a torsional force to the drive arm that drives the switch shaft from the first rotational position to the second rotational position and holds the switch shaft in the second rotational position.
  8. 8. The control switch of claim 7 further comprising a knob axially coupled to the switch shaft away from the drive arm and projecting beyond the free end of the housing, the knob driving the switch shaft to switch between the first rotational position and the second rotational position.
  9. 9. The control switch according to any one of claims 1 to 8, characterized in that the control switch comprises a drive control circuit, an actuation means controlled by the drive control circuit; the drive control circuit comprises a push-pull drive unit, an energy storage unit, a switch unit, a power positive terminal, a power negative terminal and an enabling signal input terminal; The push-pull driving unit is connected between the positive end of the power supply and the energy storage unit, and is connected between the enabling signal input end and the switch unit, and the switch unit is electrically connected with the energy storage unit and the actuating device; the switch unit is conducted after receiving an enabling signal input by the enabling signal input end, so that the energy storage unit outputs target voltage to the actuating device, and the actuating device applies pushing force which rotates from the first rotating position to the second rotating position to the switch rotating shaft through the driving arm.
  10. 10. The control switch of claim 9, wherein the control switch, The push-pull driving unit comprises a first triode Q1 and a second triode Q2; the energy storage unit comprises an energy storage circuit, a power supply circuit and a power supply circuit, wherein the energy storage circuit comprises at least one capacitor; the switching unit comprises a field effect transistor Q3 and a load output interface; the positive electrode of the power supply is electrically connected with the collector of the first triode Q1, the base of the first triode Q1 is electrically connected with the collector of the second triode Q2, the emitter of the first triode Q1 is electrically connected with the emitter of the second triode Q2 in parallel with the energy storage circuit, the positive electrode of the capacitor is electrically connected with the first output end of the load output interface, the negative electrode of the capacitor is grounded, the enabling signal input end is electrically connected with the grid electrode of the field effect transistor Q3, the base of the second triode Q2 is connected between the enabling signal input end and the grid electrode of the field effect transistor Q3, the drain electrode of the field effect transistor Q3 is electrically connected with the second output end of the load output interface, and the source electrode of the field effect transistor Q3 is electrically connected with the negative electrode of the power supply and commonly grounded.
  11. 11. The control switch of claim 9, further comprising a signal driving circuit, a magnetic element disposed on the switch shaft and synchronously rotating with the switch shaft, and a voltage converting circuit; the signal driving circuit comprises a differential signal driving unit, an alarm device driving unit and an alarm device; The differential signal driving unit comprises a logic gate chip U2 and a Hall element U3, and the alarm device driving unit comprises a fourth triode Q4, wherein the alarm device comprises an alarm body, an alarm body positive end and an alarm body negative end which are respectively and electrically connected with the alarm body; The first data input end of the logic gate chip U2 is electrically connected with the enabling signal input end, the second data input end of the logic gate chip U2 is electrically connected with the OUT end of the Hall element U3, the VDD end of the Hall element U3 is electrically connected with the first power supply end, the VCC end of the logic gate chip U2 is electrically connected with the second power supply end, the data output end of the logic gate chip U2 is electrically connected with the base electrode of the fourth triode Q4, the collector electrode of the fourth triode Q4 is electrically connected with the third power supply end, the emitter electrode of the fourth triode Q4 is electrically connected with the positive end of the display body of the alarm device, and the negative end of the display body of the alarm device is grounded; The Hall element U3 senses the magnetic field change of the magnetic element to detect that the switch rotating shaft is at the first rotating position or the second rotating position and outputs a position state signal, and the logic gate chip U2 compares the enabling signal with the position state signal and outputs a control signal according to a comparison result so as to control the alarm device to be turned on or off; The voltage conversion circuit comprises a linear voltage regulator U1, wherein an IN end of the linear voltage regulator U1 is electrically connected with a fourth power supply end, an OUT end of the linear voltage regulator U1 is electrically connected with a VCC end of the logic gate chip U2 and a VDD end of the Hall element U3, and the OUT end of the linear voltage regulator U1 outputs low-voltage direct current.
  12. 12. The control switch of claim 10, wherein the actuating device comprises a fixed seat, an electromagnetic drive unit arranged on the fixed seat, and a reset piece; The electromagnetic driving unit comprises an actuating rod and a coil encircling the periphery of the actuating rod, wherein the coil is electrically connected with the load output interface, and the reset piece is propped between the fixed seat and the actuating rod; When the drive control circuit is electrified to the coil through the load output interface, the actuating rod is movably extended out to execute pushing action on the driving arm so as to apply pushing force to the switch rotating shaft, wherein the pushing force rotates from the first rotating position to the second rotating position; When the drive control circuit stops energizing the coil through the load output interface, the actuating rod is forced by the reset member to retract in a direction opposite to the drive arm.
  13. 13. A yarn guide device comprising a delivery roller, a guide roller, a drive device for driving the delivery roller, and a control switch according to any one of claims 1 to 12, the delivery roller and guide roller winding guide yarn in multiple portions.

Description

Control switch and yarn guiding device Technical Field The invention relates to the technical field of textile machinery, in particular to a control switch and a yarn guiding device. Background Yarn guides are core components in textile machines such as false twist texturing machines, winding machines, drawing frames, etc., for guiding and transporting yarns. The yarn guide device generally includes a feed roller, a guide roller, and a driving device for driving the feed roller, and the yarn is fed by winding around the feed roller and the guide roller in a multiple-part winding manner. Yarn breakage, loss of tension or other causes tend to cause yarn entanglement (e.g. pile) or entrainment of yarn into the drive (e.g. motor) at the feed roller surface and interruption of production. Therefore, it is necessary to detect the state of yarn feeding by the yarn guide device and directly cut off the power supply to the driving device when an abnormal situation occurs. One prior art implementation is provided with a mechanical wrap detector (e.g., 200780017925.5) that uses a rotatable handle as the wrap detector, which is configured with a small gap to the roller housing. When abnormal conditions such as winding occur, the yarn drives the winding detector to rotate based on friction force, so that the power supply of the driving device is cut off through mechanical linkage. The aforementioned prior art has the disadvantages that firstly, since the power is turned off by the yarn contacting the winding detector to be rotated by the winding detector, the aforementioned prior art cannot accurately control the rotation angle of the winding detector, and the power is turned off and turned on only by the minute angle change of the knob to be displayed, and the status indication is unclear. In a workshop in which a false twist texturing machine is generally provided with hundreds of stations and densely arranged equipment, it is difficult for an operator to quickly and accurately identify whether the power supply of a yarn guide device provided on a certain yarn conveying path is turned off by visual inspection. Secondly, the foregoing prior art cannot distinguish the cause of power supply shutdown due to normal shutdown caused by real winding or abnormal shutdown caused by equipment vibration or a person's mistouching a knob, etc. Finally, the linkage mechanism in the prior art is mostly plastic, and the problems of aging, insufficient rigidity, rotation clamping stagnation and the like can occur after long-term operation, so that the detection sensitivity is reduced, and the rotation angles of the power supply turn-off are inconsistent. In view of the above, there is a need for improvements in switches and yarn guides incorporating switches in the prior art to address the above-described problems. It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present application and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the application section. Disclosure of Invention The invention aims to disclose a control switch and a yarn guide device comprising the control switch, which can timely turn off the power supply of a driving device of a conveying device when the control switch has abnormal yarn conditions on the conveying device so as to avoid overload of the driving device and solve the problem that the current working state of the conveying device in the prior art is not clear in indication. To achieve one of the above objects, an embodiment of the present invention provides a control switch for a yarn guide device in a textile machine, the yarn guide device including a feed roller and a driving device driving the feed roller, the control switch comprising: the contact switch is used for controlling the power on and the power off of the driving device; the switch rotating shaft acts on the contact switch, and the switch rotating shaft rotates to form a first rotating position at which the power supply of the driving device is turned on and a second rotating position at which the power supply of the driving device is turned off; a pretension coupled to the switch shaft; the driving arm is axially connected to the switch rotating shaft; The pretensioner applies a torsion force to the driving arm that drives the switch shaft to rotate from the first rotational position to the second rotational position, and holds the switch shaft in the second rotational position. The control switch further comprises a shell and a limiting assembly, wherein the limiting assembly comprises a first elastic element and a limiting piece, two free ends of the first elastic element are respectively propped against the limiting piece and the shell