Yarn storage device capable of being stopped quickly

Abstract

The utility model relates to the technical field of yarn conveying of flat knitting machines, and discloses a yarn storage device capable of quickly stopping, which comprises a machine body, a motor is fixed at the bottom of the machine body, a yarn storage barrel is mounted on the motor, and the motor is connected with a motor reversible operation regulation and control circuit; the motor reversible operation regulation and control circuit comprises bidirectional photoelectric couplers U3 and U4, bidirectional silicon controlled rectifiers SCR1 and SCR2, thermistors RT1 and RT2, photoelectric coupler input current-limiting resistors R10 and R11, silicon controlled rectifier control current-limiting resistors R8 and R9, a motor interface P2 and a capacitor interface P1. When the motor is shut down, braking can be achieved, and the yarn stacking phenomenon of the yarn storage barrel is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to horizontal machine yarn feeding technology field especially, relates to a kind of yarn storage device of quick stop. BACKGROUND

[0002] Yarn storage device mainly includes shell and main shaft and yarn storage drum installed on it, yarn storage drum is sleeved with presser ring and tension ring, main shaft is at the center of yarn storage drum, main shaft drives yarn storage drum rotation to store yarn;Yarn is stored on the yarn feeding wheel, yarn is output after passing through tension ring, yarn storage process of yarn storage device is as follows: motor rotation drives yarn storage drum rotation, yarn is continuously increased on yarn storage drum in the yarn storage process, with the increase of yarn, presser ring is constantly moved up, when presser ring is moved up to certain degree, contact with switch device is disconnected, motor stops rotation, yarn storage stops at this time.And with the proceeding of yarn feeding process, yarn on yarn storage drum is constantly reduced, presser ring is also moved down, when moved down to certain degree, switch is triggered to open, motor continues to work, drives yarn storage, so on and so forth.Currtent horizontal machine yarn storage device has the problem of long time from stopping work to completely stopping rotation, leading to continue to store yarn after yarn is stored, and further leading to stack yarn. SUMMARY

[0003] Therefore, the utility model aims at providing a kind of yarn storage device of quick stop to solve the problem mentioned in the above background art.

[0004] In order to achieve the above object, the utility model discloses the technical scheme that adopts such: a kind of yarn accumulator of quick shutdown, including machine body, the bottom of the machine body is fixed with motor, the motor is installed with yarn storage drum, motor is connected with motor reversible operation control circuit;The motor reversible operation control circuit includes bidirectional photoelectric coupler U3 and U4, bidirectional thyristor SCR1 and SCR2, thermistor RT1 and RT2, photoelectric coupler input current-limiting resistor R10 and R11, thyristor control electrode current-limiting resistor R8 and R9, motor interface P2 and capacitor interface P1, the 6th foot of bidirectional photoelectric coupler U3 is connected with the second anode of bidirectional thyristor SCR1, the first anode and second anode of bidirectional thyristor SCR1 are connected with the 1st foot and the 2nd foot of thermistor RT1 respectively;The first anode of bidirectional thyristor SCR1 is connected with the 3rd foot of motor interface P2;The 4th foot of bidirectional photoelectric coupler U3 is connected with the control electrode of bidirectional thyristor SCR1 by thyristor control electrode current-limiting resistor R8, the 1st foot of bidirectional photoelectric coupler U3 is connected with the 2nd foot of bidirectional photoelectric coupler U4 by photoelectric coupler input current-limiting resistor R10;The 2nd foot of bidirectional photoelectric coupler U3 is connected with the 1st foot of bidirectional photoelectric coupler U4 by photoelectric coupler input current-limiting resistor R11;The 2nd foot of bidirectional photoelectric coupler U3 is first signal input end I N1, the 2nd foot of bidirectional photoelectric coupler U4 is second signal input end IN2;The 6th foot of bidirectional photoelectric coupler U3 and the 6th foot of bidirectional photoelectric coupler U4 are connected with alternating current;The 6th foot of bidirectional photoelectric coupler U4 is connected with the second anode of bidirectional thyristor SCR2, the first anode and second anode of bidirectional thyristor SCR2 are connected with the 1st foot and the 2nd foot of thermistor RT2 respectively;The first anode of bidirectional thyristor SCR2 is connected with the 2nd foot of capacitor interface P1;The 4th foot of bidirectional photoelectric coupler U4 is connected with the control electrode of bidirectional thyristor SCR2 by thyristor control electrode current-limiting resistor R9;The 2nd foot of motor interface P2 is connected with the 2nd foot of capacitor interface P1;The 3rd foot of motor interface P2 is connected with the 1st foot of capacitor interface P1, the 1st foot of motor interface P2 is grounded, and the motor interface P2 is connected with motor, and the capacitor interface P1 is connected with capacitor.

[0005] Further, the alternating current connected with the 6th foot of bidirectional photoelectric coupler U3 and the 6th foot of bidirectional photoelectric coupler U4 is AC42V.

[0006] Further, the top end of the motor shaft of the motor is fixedly connected with the machine body, the middle and bottom of the motor shaft are connected with the yarn storage drum through one-way bearing and ordinary bearing respectively, the motor shaft is fixedly connected with the stator of motor, and the outer side of the stator is provided with the rotor fixed on the yarn storage drum.

[0007] Further, the motor reversible operation regulation circuit is connected with a single-chip microcomputer circuit, the single-chip microcomputer circuit comprises a single-chip microcomputer, and the first signal input end IN1 and the second signal input end IN2 are respectively connected to two signal output pins of the single-chip microcomputer.

[0008] Further, the body is internally provided with an infrared pair tube detection circuit and a differential operation circuit, the infrared pair tube detection circuit comprises infrared emission tubes D4 and D5, infrared receiving tubes Q1 and Q2, infrared transmission current limiting resistors R4 and R6, and infrared receiving current limiting resistors R5 and R7; the positive electrode of the infrared emission tube D4 is connected to a power supply VCC through the infrared transmission current limiting resistor R4, the anode of the infrared receiving tube Q1 is connected to the power supply VCC through the infrared receiving current limiting resistor R5, and the negative electrode of the infrared emission tube D4 and the cathode of the infrared receiving tube Q1 are grounded; the positive electrode of the infrared emission tube D5 is connected to the power supply VCC through the infrared transmission current limiting resistor R6, the anode of the infrared receiving tube Q2 is connected to the power supply VCC through the infrared receiving current limiting resistor R7, and the negative electrode of the infrared emission tube D5 and the cathode of the infrared receiving tube Q2 are grounded; the differential operation circuit comprises a double operational amplifier U6, the third pin and the fifth pin of the double operational amplifier U6 are respectively connected to the anode of the infrared receiving tube Q1 and the anode of the infrared receiving tube Q2, the first pin and the seventh pin of the double operational amplifier U6 are connected to two signal input pins of a single-chip microcomputer, the power supply VCC is connected to the first pin of a resistor R15, the second pin of the resistor R15 is connected to the second pin and the sixth pin of the double operational amplifier U6 and the first pin of a resistor R18, and the second pin of the resistor R18 is grounded.

[0009] Further, the body is internally provided with a power supply circuit; the power supply circuit comprises an aviation plug interface circuit, a step-down circuit and an isolation power supply circuit; the aviation plug interface circuit is connected with the step-down circuit, the step-down circuit is connected with the isolation power supply circuit, and the isolation power supply circuit outputs a power supply VCC; and the power supply circuit provides working voltages for the infrared pair tube detection circuit, the differential operation circuit, the motor reversible operation regulation circuit and the single-chip microcomputer circuit.

[0010] Advantages

[0011] Compared with the prior art, the utility model at least has the following advantages:

[0012] The setting of the one-way bearing can prevent the yarn storage drum from reversing, can prevent the yarn storage drum from reversing when the operator unintentionally touches or the yarn tension is too large to stop, thereby preventing the yarn from loosening and falling off the yarn storage drum. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the yarn storage device structure of the utility model.

[0014] Figure 2 It is a circuit principle diagram of the reversible motor running control circuit of the yarn storage device of the utility model.

[0015] Figure 3 It is a principle diagram of the yarn storage device infrared pair tube detection circuit of the utility model.

[0016] Figure 4 It is a principle diagram of the yarn storage device differential operation circuit of the utility model.

[0017] Figure 5 It is a principle diagram of the yarn storage device single-chip microcomputer circuit of the utility model.

[0018] Figure 6 It is a principle diagram of the yarn storage device step-down circuit of the utility model.

[0019] Figure 7 It is a principle diagram of the yarn storage device isolation power supply circuit of the utility model.

[0020] Figure 8 It is a principle diagram of the aviation plug interface circuit of the utility model.

[0021] Marked in the figure: 1 - rack; 2 - circuit board; 3 - power switch; 4 - anti-loose key groove; 5 - presser ring; 6 - yarn storage drum; 7 - motor; 70 - rotor; 71 - stator; 72 - motor shaft; 8 - one-way bearing; 9 - ordinary bearing; 10 - micro switch; 11 - infrared pair tube. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will make detailed description combining with the drawings and specific embodiments. In the following description, a lot of specific details are set forth in order to give a thorough understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, therefore the utility model is not limited by the following disclosed specific implementation.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the one element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right" and similar expressions as used herein are for illustrative purposes only and are not intended to be limiting.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0025] Referring to Figures 1-8 The embodiment provides a yarn accumulator capable of quick shutdown, which comprises a machine body 1, an electric circuit board 2 and a micro switch 10 arranged in the machine body 1, and a power switch 3 arranged at the top of one end of the machine body 1. A motor 7 is fixed to the bottom of the machine body 1, a yarn storage drum 6 is arranged on the motor 7, a yarn pressing ring 5 is arranged on the yarn storage drum 6, the yarn pressing ring 5 can rotate with the yarn storage drum 6, and the yarn pressing ring 5 can indirectly control the rotation of the motor 7 by contacting or disconnecting the micro switch 10 arranged in the machine body 1 by swinging upwards, so that the yarn storage amount of the yarn accumulator is controlled.

[0026] In the utility model technical scheme, the top end of the motor shaft 72 of the motor 7 is fixedly connected with the machine body 1, the middle part and the bottom part of the motor shaft 72 are connected with the yarn storage drum 6 through the one-way bearing 11 and the ordinary bearing 10 respectively, the motor shaft 72 is fixedly connected with the stator 71 of the motor 7, and the outer side of the stator 71 is provided with the rotor 70 fixed on the yarn storage drum 6. The one-way bearing 11 is fixed to the motor shaft 72 through the anti-loosening key groove 4.

[0027] In the utility model technical scheme, the motor is connected with a motor reversible operation control circuit.

[0028] The motor reversible operation control circuit comprises bidirectional photoelectric coupler U3 and U4, bidirectional thyristor SCR1 and SCR2, thermistor RT1 and RT2, photoelectric coupler input limiting resistor R10 and R11, thyristor control electrode limiting resistor R8 and R9, motor interface P2 and capacitor interface P1, the sixth pin of the bidirectional photoelectric coupler U3 is connected with the second anode of the bidirectional thyristor SCR1, the first anode and the second anode of the bidirectional thyristor SCR1 are connected with the first pin and the second pin of the thermistor RT1 respectively; the first anode of the bidirectional thyristor SCR1 is connected with the third pin of the motor interface P2; the fourth pin of the bidirectional photoelectric coupler U3 is connected with the control electrode of the bidirectional thyristor SCR1 through the thyristor control electrode limiting resistor R8, the first pin of the bidirectional photoelectric coupler U3 is connected with the second pin of the bidirectional photoelectric coupler U4 through the photoelectric coupler input limiting resistor R10; the second pin of the bidirectional photoelectric coupler U3 is connected with the first pin of the bidirectional photoelectric coupler U4 through the photoelectric coupler input limiting resistor R11; the second pin of the bidirectional photoelectric coupler U3 is the first signal input end IN1, the second pin of the bidirectional photoelectric coupler U4 is the second signal input end IN2; the sixth pin of the bidirectional photoelectric coupler U3 and the sixth pin of the bidirectional photoelectric coupler U4 are connected with AC 42V alternating current; the sixth pin of the bidirectional photoelectric coupler U4 is connected with the second anode of the bidirectional thyristor SCR2, the first anode and the second anode of the bidirectional thyristor SCR2 are connected with the first pin and the second pin of the thermistor RT2 respectively; the first anode of the bidirectional thyristor SCR2 is connected with the second pin of the capacitor interface P1; the fourth pin of the bidirectional photoelectric coupler U4 is connected with the control electrode of the bidirectional thyristor SCR2 through the thyristor control electrode limiting resistor R9; the second pin of the motor interface P2 is connected with the second pin of the capacitor interface P1; the third pin of the motor interface P2 is connected with the first pin of the capacitor interface P1, the first pin of the motor interface P2 is grounded, the motor interface P2 is connected with the motor, wherein the first pin of the motor interface P2 is connected with the common terminal of the motor, the second pin is connected with the main winding, and the third pin is connected with the auxiliary winding; the capacitor interface P1 is connected with the capacitor.

[0029] In the specific implementation, the forward rotation, reverse rotation and stop rotation of the motor are realized by changing the high and low levels of the first signal input end IN1 and the second signal input end IN2. When the first signal input end IN1 and the second signal input end IN2 are both low, the motor 7 stops rotating. When the input signal of the first signal input end IN1 is high and the input signal of the second signal input end IN2 is low, the first signal input end IN1 inputs a current-limiting resistor R11 to the first pin of the bidirectional optocoupler U4 through the optocoupler, the second pin of the bidirectional optocoupler U4 returns to the second signal input end IN2 (low), enables the bidirectional optocoupler U4 to work, the fourth pin and the sixth pin of the bidirectional optocoupler U4 are turned on, the power supply AC42 is supplied to the main winding of the motor 7 and one pin of the capacitor, and the other pin of the capacitor is connected to the auxiliary winding of the motor 7, so that the motor rotates in the forward direction. When the input signal of the first signal input end IN1 is low and the input signal of the second signal input end IN2 is high, the high level of the second signal input end IN2 inputs a current-limiting resistor R10 to the first pin of the bidirectional optocoupler U3 through the optocoupler, the second pin returns to the first signal input end IN1 (low), enables the bidirectional optocoupler U3 to work, the fourth pin and the sixth pin of the output end of the bidirectional optocoupler U3 are turned on, the power supply AC42 is supplied to the auxiliary winding of the motor and one pin of the capacitor, and the other pin of the capacitor is connected to the main winding of the motor, so that the motor 7 rotates in the reverse direction. When the yarn accumulator needs the motor to stop rotating immediately, the level state of the first signal input end IN1 and the second signal input end IN2 of the motor reversible operation control circuit is changed, a reverse rotation driving force is applied to the motor, the motor is braked to stop rotating, and the occurrence of the yarn winding phenomenon of the yarn accumulator is avoided.

[0030] Further, the motor reversible operation control circuit is connected with a single-chip microcomputer circuit, and the single-chip microcomputer control circuit 17 comprises a single-chip microcomputer U5. The eighth pin of the single-chip microcomputer U5 is connected with the tenth pin through a capacitor C8, the eighth pin is connected with the power supply VCC, and the tenth pin is connected with the ground. The capacitor C8 is a decoupling capacitor, and a power switch and a micro switch are connected to the first pin and the third pin of the interface P5 connected with the single-chip microcomputer U5. The first signal input end IN1 and the second signal input end IN2 are respectively connected to the twentieth pin and the nineteenth pin of the single-chip microcomputer U5, and the forward rotation, reverse rotation and stop rotation states of the motor are controlled by changing the high and low level states of the two signal output pins of the single-chip microcomputer U5.

[0031] The utility model discloses technical scheme, infrared pair pipe detection circuit and difference operation circuit are arranged in the organism 1, infrared pair pipe detection circuit includes infrared emission tube D4 and D5, infrared receiving tube Q1 and Q2, infrared sending current -limiting resistance R4 and R6, infrared receiving current -limiting resistance R5 and R7. The anode of infrared emission tube D4 is connected power VCC through infrared sending current -limiting resistance R4, the anode of infrared receiving tube Q1 is connected power VCC through infrared receiving current -limiting resistance R5, the cathode of infrared emission tube D4 and infrared receiving tube Q1 is grounded;The anode of infrared emission tube D5 is connected power VCC through infrared sending current -limiting resistance R6, the anode of infrared receiving tube Q2 is connected power VCC through infrared receiving current -limiting resistance R7, the cathode of infrared emission tube D5 and infrared receiving tube Q2 is grounded;Difference operation circuit includes double operational amplifier U6, the 3rd leg and the 5th leg of double operational amplifier U6 are connected the anode of infrared receiving tube Q1 and the anode of infrared receiving tube Q2 respectively, the 1st leg and the 7th leg of double operational amplifier U6 are connected two signal input pins of singlechip U5, and respectively the 4th leg and the 5th leg of singlechip U5. The 1st leg of power VCC is connected resistance R15, the 2nd leg of resistance R15 is connected to the 2nd leg and the 6th leg of double operational amplifier U6, and the 1st leg of resistance R18, the 2nd leg of resistance R18 is grounded. Power VCC, resistance R15 and R16 constitute a voltage divider circuit.

[0032] The upper end of the yarn storage cylinder is provided with 18 equal teeth, the infrared emission tube irradiates from inside to outside, and the teeth of the yarn storage cylinder are irradiated, and a signal is emitted to the infrared receiving tube, the operation of the motor is monitored, and the signal is transmitted to the 4th leg and the 5th leg of the singlechip U5, so that the singlechip U5 obtains the working state of the motor, and the singlechip U5 outputs high and low levels to the first signal input end IN1 and the second signal input end IN2. In solving the phenomenon of stacking yarn caused by the inertia rotation of the motor after the yarn storage cylinder is full of yarn, the presser ring swings upward to trigger the microswitch to disconnect, at this time, the yarn storage device is full of yarn, the singlechip U5 inputs low levels to the first signal input end IN1 and the second signal input end IN2, and the reversible operation control circuit outputs a signal to stop the forward rotation of the motor, so that the motor stops working, at this time, the motor shaft continues to rotate forward due to inertia, then the singlechip inputs low levels and high levels to the first signal input end IN1 and the second signal input end IN2 respectively, the reversible operation control circuit outputs a signal to reverse the motor, and the motor shaft is driven to rotate reversely until the infrared pair tube detects that the motor shaft does not rotate, then the singlechip U5 inputs low levels to the first signal input end IN1 and the second signal input end IN2, and the reversible operation control circuit outputs a signal to stop the motor, so that the motor stops working.

[0033] The utility model discloses a technical scheme, the power supply circuit is provided in the body, the power supply circuit includes aviation plug interface circuit, voltage reducing circuit and isolation power supply circuit, the aviation plug interface circuit connects aviation plug, and aviation plug is connected with the flat knitting machine through cable, the aviation plug interface circuit is connected with voltage reducing circuit, voltage reducing circuit is connected with isolation power supply circuit, and isolation power supply circuit exports power VCC, the power supply circuit provides working voltage for infrared pair tube detection circuit, difference operation circuit, motor reversible operation control circuit and singlechip circuit, wherein, the aviation plug interface circuit 15 includes aviation plug interface P3, the fourth foot of aviation plug interface P3 connects the power supply AC42V of the power supply circuit provided in the flat knitting machine inside one pole, as voltage reducing circuit input and output and isolation power supply circuit input common ground SGND, simultaneously connects the common end of motor 7, the third foot of aviation plug interface P1 connects the other pole of power supply AC42V, passes through fuse F1, respectively connects the sixth foot of bidirectional photoelectric coupling U3 and U4 and the pressure sensitive resistance RV1 of motor reversible operation control circuit, RV1 is connected to fast recovery diode D2, and fast recovery diode D2 carries out half wave rectification, and supplies power for voltage reducing circuit, the voltage reducing circuit 14 includes DC-DC power supply chip U2 and its peripheral circuit, and the isolation power supply module includes isolation power supply module U1 and its peripheral circuit.

[0034] The above circuit is arranged on the circuit board 2.

[0035] The above embodiment is only used to illustrate the technical scheme of the utility model, and is not limited to it; although the utility model is explained in detail with reference to the foregoing embodiment, those skilled in the art should understand that: it still can modify the technical scheme recorded in the foregoing embodiment, or equivalent replacement is carried out to part of technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the utility model embodiments.

Claims

1. A quick stop storage device, characterized in that, The machine body is fixed with a motor at the bottom, and a yarn storage drum is installed on the motor, and a motor reversible operation control circuit is connected to the motor; the motor reversible operation control circuit comprises a bidirectional photoelectric coupler U3 and U4, a bidirectional thyristor SCR1 and SCR2, a thermistor RT1 and RT2, a photoelectric coupler input limiting resistor R10 and R11, a thyristor control electrode limiting resistor R8 and R9, a motor interface P2 and a capacitor interface P1, the sixth pin of the bidirectional photoelectric coupler U3 is connected to the second anode of the bidirectional thyristor SCR1, the first anode and the second anode of the bidirectional thyristor SCR1 are respectively connected to the first pin and the second pin of the thermistor RT1; the first anode of the bidirectional thyristor SCR1 is connected to the third pin of the motor interface P2; the fourth pin of the bidirectional photoelectric coupler U3 is connected to the control electrode of the bidirectional thyristor SCR1 through the thyristor control electrode limiting resistor R8, the first pin of the bidirectional photoelectric coupler U3 is connected to the second pin of the bidirectional photoelectric coupler U4 through the photoelectric coupler input limiting resistor R10; the second pin of the bidirectional photoelectric coupler U3 is connected to the first pin of the bidirectional photoelectric coupler U4 through the photoelectric coupler input limiting resistor R11; the second pin of the bidirectional photoelectric coupler U3 is the first signal input end IN1, and the second pin of the bidirectional photoelectric coupler U4 is the second signal input end IN2; the sixth pin of the bidirectional photoelectric coupler U3 and the sixth pin of the bidirectional photoelectric coupler U4 are connected to alternating current; the sixth pin of the bidirectional photoelectric coupler U4 is connected to the second anode of the bidirectional thyristor SCR2, the first anode and the second anode of the bidirectional thyristor SCR2 are respectively connected to the first pin and the second pin of the thermistor RT2; the first anode of the bidirectional thyristor SCR2 is connected to the second pin of the capacitor interface P1; the fourth pin of the bidirectional photoelectric coupler U4 is connected to the control electrode of the bidirectional thyristor SCR2 through the thyristor control electrode limiting resistor R9; the second pin of the motor interface P2 is connected to the second pin of the capacitor interface P1; the third pin of the motor interface P2 is connected to the first pin of the capacitor interface P1, the first pin of the motor interface P2 is grounded, the motor interface P2 is connected to the motor, and the capacitor interface P1 is connected to the capacitor.

2. A quick stop storage device according to claim 1, characterized in that The alternating current connected to the sixth pin of the bidirectional photoelectric coupler U3 and the sixth pin of the bidirectional photoelectric coupler U4 is AC 42V.

3. A quick stop storage device according to claim 1, wherein The top end of the motor shaft of the motor is fixedly connected to the machine body, the middle part and the bottom part of the motor shaft are respectively connected with the yarn storage drum through the one-way bearing and the ordinary bearing, and the motor shaft is fixedly connected with the stator of the motor, and the outer side of the stator is provided with the rotor fixed on the yarn storage drum.

4. A quick stop storage device according to claim 1, wherein The motor reversible operation control circuit is connected with a single-chip microcomputer circuit, and the single-chip microcomputer circuit comprises a single-chip microcomputer, and the first signal input end IN1 and the second signal input end IN2 are respectively connected to two signal output pins of the single-chip microcomputer.

5. A quick stop storage device according to claim 4, wherein The machine body is provided with an infrared pair tube detection circuit and a differential operation circuit, the infrared pair tube detection circuit comprises infrared emission tubes D4 and D5, infrared receiving tubes Q1 and Q2, infrared transmission limiting resistors R4 and R6, and infrared receiving limiting resistors R5 and R7; the positive pole of the infrared emission tube D4 is connected to the power supply VCC through the infrared transmission limiting resistor R4, the anode of the infrared receiving tube Q1 is connected to the power supply VCC through the infrared receiving limiting resistor R5, and the negative pole of the infrared emission tube D4 and the cathode of the infrared receiving tube Q1 are grounded; the positive pole of the infrared emission tube D5 is connected to the power supply VCC through the infrared transmission limiting resistor R6, the anode of the infrared receiving tube Q2 is connected to the power supply VCC through the infrared receiving limiting resistor R7, and the negative pole of the infrared emission tube D5 and the cathode of the infrared receiving tube Q2 are grounded; the differential operation circuit comprises a double operational amplifier U6, the third pin and the fifth pin of the double operational amplifier U6 are connected to the anode of the infrared receiving tube Q1 and the anode of the infrared receiving tube Q2 respectively, the first pin and the seventh pin of the double operational amplifier U6 are connected to two signal input pins of the single-chip microcomputer, the power supply VCC is connected to the first pin of the resistor R15, the second pin of the resistor R15 is connected to the second pin and the sixth pin of the double operational amplifier U6, and the first pin of the resistor R18, and the second pin of the resistor R18 is grounded.

6. A quick stop storage device according to claim 5, wherein The machine body is provided with a power supply circuit; the power supply circuit comprises an aviation plug interface circuit, a step-down circuit and an isolation power supply circuit; the aviation plug interface circuit is connected with the step-down circuit, the step-down circuit is connected with the isolation power supply circuit, and the isolation power supply circuit outputs the power supply VCC; the power supply circuit provides working voltage for the infrared pair tube detection circuit, the differential operation circuit, the motor reversible operation control circuit and the single-chip microcomputer circuit.

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