KR200163955Y1 - Control device for dc motor-driver - Google Patents

Abstract

The present invention relates to a direct current driver control device with a built-in torque limit clutch, more specifically, the number of blows can be adjusted according to the type of screw used in the electric driver, to protect the circuit from the load short circuit, The present invention relates to a DC motor driver control device capable of adjusting the rotation speed, having a reverse rotation function, and detecting a screwing state and informing a user of occurrence of an abnormal state.

DC motor driver control apparatus of the present invention, the speed and time setting unit 30 for adjusting the curve angle of the electric driver, the high speed and low speed rotation speed, and set the time when the screw abnormality detection; Power supply circuits 32 and 46 for modulating the commercial power to a predetermined voltage and supplying each of the control devices; A screwing state detecting circuit 34 which detects the screwing state and outputs a completion state when the screwing is completed and outputs an abnormal occurrence signal when an abnormal state is detected; A control unit 36 which controls all operation states of the control device, in which a program is embedded in an internal memory; A display unit 38 comprising a plurality of light emitting diodes for visually displaying all operating states of the control device; A lamp driving circuit 40 for driving the lamp to display the outside when an overcurrent is detected; An external input and an internal circuit insulation unit 42 for blocking unnecessary signals input from the outside; A blow count adjusting unit 44 for displaying the operation state of the control device and adjusting the blow count; An overcurrent detection and signal blocking circuit 48 for blocking the PWM signal to detect the overcurrent and to block it; A gate part 50 including a plurality of gate arrays; A drive unit 52 for driving a specific portion of the control device including the motor 60; And a selection terminal 18 for operating the motor for screwing.

Description

Control means for direct current driving driver

The present invention relates to a direct current driver control device with a built-in torque limit clutch, more specifically, the number of blows can be adjusted according to the type of screw used in the electric driver, and the boot short circuit is protected, The present invention relates to a direct current driver control device capable of freely adjusting the rotation speed, having a reverse rotation function, and having a function of detecting a screwing state and informing a user of occurrence of an abnormal state.

In the industrial field, an electric driver driven by a powerful motor is used to fix the screw efficiently in a short time. The motorized screwdriver is screwed to a hard surface such as concrete wall surface by using the power of the built-in motor, and then hits with strong pressure again to completely attach to the wall surface so that the work impossible by manpower can be efficiently and reliably performed. do.

However, it is difficult to remotely control the electric driver that is normally used by the user, and it is difficult not only to adjust the rotational speed of the motor and the number of hits after the screw is stuck on the wall, but also according to the strength of the wall to which the screw is fixed. However, there is a problem that cannot be used in an automated facility because the user must visually inspect the screwing state of the screw.

The present invention is devised to solve the above problems, the object of the present invention is to adjust the number of strokes according to the type of screw used, free rotation speed adjustment, there is also a reverse rotation function, The present invention provides a control device for a torque limit-type clutch built-in electric driver having a function of detecting a screwing state and informing a user of an abnormality.

DC motor driver control device of the present invention for achieving the above object, the speed and time setting unit 30 for adjusting the curve angle of the electric driver, adjusting the high speed and low speed rotation, and setting the time when the screwing abnormality detection ), Power supply circuits 32 and 46 for modulating the commercial power to a predetermined voltage and supplying them to the control device, respectively, and detecting the screwing state and outputting a completion state when the screwing is completed, and generating an abnormal signal when an abnormal state is detected. The screwed-in state detecting circuit 34 which outputs, the control unit 36 which controls all the operating states of a control apparatus, the program which is built in an internal memory, and a plurality of light emitting diodes for visually displaying all the operating states of the control apparatus. The display unit 38 is configured to include: a lamp driving circuit 40 for driving the lamp to display the outside when an overcurrent is detected; an unnecessary signal input from the outside External input and internal circuit isolation unit 42 for blocking, the blow count adjustment unit 44 for displaying the operation state of the control device and adjusting the blow frequency, overcurrent detection for blocking the PWM signal to detect and block the overcurrent and A signal cut-off circuit 48, a gate portion 50 consisting of a plurality of gate arrays, a drive portion 52 for driving a particular portion of a control device comprising a motor 60, and a choice for operating the motor for screwing It is characterized by consisting of a terminal (18).

Figure 1a is a front view of the DC motor drive control device according to the present invention, Figure 1b is a selection terminal located on the rear of the control device for operating the DC motor driver.

2 is a time difference art showing the operating state of the reverse function according to the present invention.

3 is a time difference art showing the operating state of the soft start function according to the present invention.

4a and 4b are time difference art showing the operating states of the L and H functions according to the present invention.

Figure 5 is a schematic diagram showing the configuration of the screwing state detection sensor according to the present invention.

6a and 6b are detailed circuit diagrams of a direct current driver control apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

10: control device 12: power switch

18: selection panel 16: connector

22: screw 24: rod

26: detection sensor 28: screwdriver

30: speed and time setting unit 32: power supply circuit

34: screwing state detection circuit 36: control unit

38: display unit 40: lamp driving circuit

42: external input and internal circuit insulation

44: blow count adjusting unit 46: power supply circuit

48: overcurrent detection and signal blocking circuit

50: gate portion 52: driving portion

Hereinafter, the DC motor driver control apparatus of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1A is a front view of the DC motor driver control apparatus 10 of the present invention, and the front panel 14 is provided with a plurality of display lamps and regulators for displaying the operating states of the power switch 12 and the control apparatus. Display lamps include power indicators, drive status indicators, and shutdown indicators. Reverse lamps 14a, soft start lamps 14b, delay-cancellation lamps l4c, low-high lamps 14d, and error indication lamps 14e. ), A reset lamp 14j, and the like, and bolting time selection volumes 14f, speed-low and speed-high adjustment volumes 14g and 14h, delay time setting volumes 14, and the like are provided. The display lamps may be configured using light emitting diodes (LEDs), and the like, which corresponds to the display unit 38 in the present disclosure, will be apparent to those skilled in the art.

Figure 1b is a terminal for selecting the operation of the motor, is installed on the side or the rear of the control device 10, the reverse function (counterclockwise rotation) is performed by applying a predetermined power to the common terminal and the reverse terminal, and the common terminal and The soft start function is performed by connecting power to the soft start terminal. Hereinafter, power is applied to operate the motor in the same manner.

The on state of the display lamps (LED) and the operating state of the volume is as follows.

The reverse lamp 14a is turned on only when the reverse function is used. If the reverse function is turned on while the screwdriver is stopped, referring to Fig. 2, the screwdriver will rotate in reverse (counterclockwise rotation), which is independent of the drive signal and the torque signal. It works. That is, the drive signal is ignored when the reverse function is on. The rotation speed in the reverse function is set by the speed-high setting volume 14h. FIG. 2 shows the applied voltages of drive, torque, and reverse on.

The soft-start lamp 14b is turned on only when the soft-start function is activated. Referring to FIG. 3, the soft start function operates normally at full speed when the drive input is turned on in the off state, and when the drive input is turned on in the on state, it rotates slowly until the on state. The speed is increased from the point of turning off to reach the maximum speed. The arrival time is adjusted by the delay time setting volume 14i, and the L and H functions are ignored when the soft start function is being performed. If the soft start function is turned on after the drive signal is turned on, the soft start function is not performed.

The delay-cancel lamp 14c is turned on only when the delay-cancel function is activated. The delay-cancellation function is used for rapid change by setting the change time of L → H and H → L to 0 when L and H functions are used.

The low-high lamp 14d is turned on only when the L and H functions are activated. L and H adjust the motor speed in the screwing state. 4A and 4B, the L and H functions are invalid when the soft start function is used. When the drive input is turned on when the soft start function is turned off, the normal full speed operation is performed. When the drive input is turned on in the on state, the drive starts to rotate at high speed until it is turned on. After that, it turns to high speed if it is on again and to low speed if it is turned off. The speed adjustment of the low speed and high speed is performed by the speed-low and speed-high setting volumes 14g and 14h installed in the panel 14, and the transition time is adjusted by using the delay time setting volume 14i. . In Figs. 4A and 4B, L and H represent an input in a low-high operating state, a drive is a drive input, a torque is a torque state, a driver is an electric driver, and a cancle is cancellation. .

The error lamp 14e detects this when the screw is not nailed correctly during the screwing operation and turns on. When the error occurs during the screwing operation, Kim sets the time required for screwing in the control unit. If there is no tightening completion signal after that time has elapsed, it is judged to be screwing abnormal. The abnormal state detection at this time is the wear of the screw head or the absence of the screw. Another method is a sensor installed adjacent to a screwdriver-driven electric driver. The installation state of the error detection sensor is as follows with reference to FIG.

As shown, when the screw 22 is nailed to the wall surface 20 normally when the screw 22 is nailed to the wall surface 20 by the rod 24 connected to the motor 60 of the motorized driver 28. The main body of the driver 28 is advanced, and at this time, the sensing sensor 26 installed on the side of the electric driver 28 detects this movement state and generates an electric signal H corresponding thereto. The signal of the sensing sensor 26 is input through a sense-in terminal.

However, as shown below, if the screw 22 is not accurately nailed to the wall 20, the main body of the electric driver 28 is not moved, and thus the main body cannot be detected by the sensor 26, and thus the electric signal (Pulse wave) is generated. For example, the detection sensor 26 may be configured by using an element having a light emitting unit and a light receiving unit at the same time. At this time, the detection state is to detect whether the screw is completely stuck.

The bolting time selection volume 14f sets the bolting time. If the torque-in signal is not input for three seconds after the set time has elapsed, an error indicating no bolt is returned to the error lamp 14e. It is displayed through. The speed-low setting volume 14g sets the low speed rotation (0 to 50% of the motor rotation) when the L and H functions are used. The speed-high setting volume 14h sets the high speed rotation (50-100% of the motor rotation) when the L and H functions are used. The delay time setting volume 14i sets the transition time when the soft start function and the L and H functions are used. In this invention, it is set up to 5 seconds. The reset switch 14j is a switch used to reset hardware and software.

6a and 6b are detailed circuit diagrams of the control device for a direct current electric driver according to the present invention. When largely classified, the curvature angles of the electric motors as described below are adjusted, the high speed and the low speed rotation speed are adjusted, and the screwing abnormality is detected. The speed and time setting unit 30 for setting the time of the power supply, the power supply circuits 32 and 46 for modulating the commercial power to a predetermined voltage and supplying them to the control device, respectively, and the screwing state is sensed, and the completion of the screwing is completed. And a screwing state detecting circuit 34 for outputting an error signal when an abnormal state is detected, controlling all operating states of the control device, including the controller 36 having a program built into the internal memory, and all of the control device. Display unit 38 consisting of a plurality of light emitting diodes for visually displaying the operation state, the lamp drive for driving the lamp to display to the outside when an overcurrent is detected The furnace 40, the external input and internal circuit insulation unit 42 for blocking unnecessary signals from the outside, the blow count adjustment unit 44 for displaying the operation state of the control device and adjusting the blow frequency, and detecting the overcurrent In order to block this, an overcurrent detection and signal blocking circuit 48 for blocking the PWM signal, a drive unit 52 for driving a specific portion of the control unit of the gate unit 50 composed of a plurality of gate arrays, and a selection terminal 18 It includes.

The speed and time setting unit 30 for adjusting the curve angle of the electric driver, adjusting the high speed and low speed rotation speed, and setting the abnormal detection waiting time during the screwing operation has a plurality of volumes (VR1, VR2, VR3, VR4). It consists of. The volume VR1 adjusts the curve angle during soft start and high speed ↔ low speed switching. The volume VR2 sets the high speed rotation speed, and the volume VR3 plays a role of setting the low speed rotation speed. In addition, the volume (VR4) is to set the delay time when detecting the screwing abnormality. For example, if the time required for screwing is 5 seconds, if the volume (VR4) is set to 6 seconds using the volume (VR4), after 6 seconds have passed, If it is not completed, it is regarded as abnormal.

The power supply circuits 32 and 46 for modulating the commercial power to a predetermined voltage and supplying them to the control device, respectively, are for supplying power used in the control device of the present invention, and 32 are diodes D01, D02, D03, and D04. The capacitors C02, C03, C04, C05, C06 and the integrated circuit IC1 modulate and supply AC8V to DC5V. 46 (FIG. 6b) is a bridge rectifier diode D30 and capacitors C08, C09, AC22V is rectified by C10, C11, C03, C04) and integrated circuit IC1, converted into DC30V and DC15V, and supplied to each part.

The screwing state detecting circuit 34, which detects the screwing state and outputs a completion state when the screwing is completed, and outputs a signal when an abnormal state is detected, is composed of a screwing completion output circuit and a screwing abnormality detecting circuit. . The screwing completion circuit operates the relay RYl shown in FIG. 6B by the integrated circuit U04B, the resistor R13, and the transistor QO1 to display the completion of the peeling external output. In addition, the screwing abnormality detection circuit outputs the screwing abnormality occurrence to the outside by the resistor R22, the diode D20, the transistor Q02, the resistor R16, and the relay RYl. Abnormal detection is the same as described with reference to FIG.

The controller 36, which controls all operating states of the control device, in which a program is embedded in the internal memory device of the integrated circuit, includes a microprocessor U02, an oscillator (0SC), and peripheral circuits capacitors (C31, C32, C123), It consists of the resistor R19 and the diode D14. The control unit 36 stores control time data and the like set by the speed and time setting unit 30.

In addition, the display unit 38 for visually displaying all the operating states of the control device is composed of a plurality of light emitting diodes D20, D21, D22, D23, and D24. The light emitting diode (D20) lights up when the buckling over abnormality is detected, the light emitting diode (D21) lights up during the high speed ↔ low speed conversion, the light emitting diode (D22) lights up when the curve is canceled during the high speed ↔ low speed conversion, and the light emitting diode (D23) is soft. Lights up at start. These essentially correspond to the lamps 14b to 14e provided in the front panel 14 of FIG.

The lamp driving circuit C40, which drives the lamp to be displayed externally when an overcurrent is detected, includes a resistor R29, an integrated circuit U04F, a resistor R30, a transistor Q05, and a resistor R31. Light-emitting diode LED2 of FIG. 6B is turned on.

The external input and internal circuit insulation unit 42 for blocking unnecessary signals input from the outside includes integrated circuits U02, U03, U05, and U06, and other substrates and external circuits when connecting the circuits of FIGS. 6A and 6B. It blocks the noise signal from.

In addition, the number of stroke adjustment unit 44 for displaying the operating state of the control device of the present invention and adjusting the number of strikes, referring to Figure 6b, the power display lamp (LED1), drive and overcurrent detection display lamp (LED2), It is composed of a screwing completion indication lamp LED3 and a switch SW1 for adjusting the number of strokes (1, 2, 3 times). The screw strike is performed by a device that is self-built in the electric driver (28).

The overcurrent detection and signal blocking circuit 48 which detects the overcurrent and cuts off the PWM signal to detect the overcurrent is detected by the resistors R24 and R27, the capacitor C33 and the SCR, and the transistor Q07 and the resistor R13. R14) is operated to transfer the signal to the integrated circuit UO4B to block the PWM signal. The PWM signal is a pulse width modulation control signal. The sampling period T and crest value are constant, and the pulse width changes according to the control signal. The PWM signal has a characteristic of controlling the energization time by changing the spread width. Therefore, it is used to control motors and actuators. In the present invention, it is used to control the rotation time and speed of the motor of the DC motor driver 28 used to screw. Therefore, when the PWM signal is blocked, the operation of the DC motor driver 28 is stopped and the screwing operation is stopped.

In addition, the gate portion 50 is composed of a plurality of gate array, the integrated circuit (U04B) is a malfunction of the circuit signal to control the rotation direction of the motor 60 of the DC motor driver 28 clockwise and counterclockwise It protects the driving circuit by blocking the PWM signal when the overcurrent detecting circuit is operated because the current is exceeded the specified value or the load is greatly applied to rotate at the same time. In addition, the integrated circuit U04A turns on the transistors QO1 and QO4 so that the brake is applied when a signal for controlling the rotation of the motor 60 of the DC motor driver 28 to rotate clockwise or counterclockwise is not detected. do. In addition, the integrated circuit U03A detects and simultaneously applies to the integrated circuit UO4B when a control signal for clockwise and counterclockwise rotation occurs.

In addition, the driver 52 is for driving the DC vibration driver 28 of the control device, and the transistors Q03 and Ql1 are driven by the PWM control signal when the DC motor driver 28 rotates clockwise. The transistors QO1 and Q14 are turned on when the DC motor driver 28 rotates in the clockwise direction, and are turned on during the brake operation when there are no clockwise or counterclockwise signals. The transistors Q02 and Q12 are driven by the PWM control signal when rotating in the counterclockwise direction. The transistors Q04 and Q13 are turned on in the counterclockwise rotation, and are turned on in the brake operation when there are no control signals for clockwise and counterclockwise rotation. In the absence of a signal for clockwise or counterclockwise rotation, the brake operation constitutes a closed circuit with the transistors Q13 and Ql1 and the motor 60 of the electric driver, or the motors of the transistors Q14 and Q12 and the electric driver. A closed circuit is formed with the 60 to brake operation. The selection terminal 18 is the same as that described in FIG. 1B.

Referring to the operating state of the control device for a direct current electric driver of the present invention having the configuration as described above are as follows.

In order to screw on the wall of the predetermined position, the power switch 12 of the DC motor driver is turned on to apply power, and the screw 22 is coupled to the connector 16 installed on the front panel 14 of the controller. Connect the DC motor driver (28 in Fig. 5). When the power is applied to the soft start terminal 18-5 and the common terminal l8-3 of the selection terminal 18 installed at the rear in the state connected in this way, the DC motor driver 28 rotates and the screw 22 It begins to get stuck in the wall 20. If the screw is completely stuck and the shaft of the electric driver 28 is no longer able to rotate, the electric driver 28 automatically stops and sends a completion signal after the blow by the adjusted number of strokes.

At this time, the control device of the present invention can adjust the number of blows according to the size of the screw, and also can be usefully used by using the reverse function (counterclockwise rotation function) when performing the initial positioning operation of the screw. In the case of using a thin screw, the rotation speed is gradually increased by the soft start function, which is useful for screw positioning. Moreover, various types of screws can be used because the low speed, high speed switching operation without time delay and the low speed, high speed switching operation without time delay can be performed.

It also has the function of detecting this when a screwing abnormality occurs, which makes it possible to detect two types of abnormalities, such as no wear or loosening of the screw head, or a loosely screwed state without the screw being completely nailed. That is, if the time required for screwing is set in the control device and there is no input of the tightening completion signal even after the time elapses, it is determined that there is no screw. Or connect the sensing sensor that detects the height of the screwing device of the electric driver to the control device of the present invention. Done.

According to the present invention as described above, the number of blows can be adjusted according to the type of screw used, free rotation speed can be adjusted, and there is a reverse rotation function, and it also detects the screwing state and informs the user of the abnormality. It is possible to provide a control device for a torque-driven clutch built-in electric driver with a function.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art to which the present invention pertains, but it can be modified or changed within the spirit and scope of the present invention, and such modifications or changes belong to the appended claims of utility model registration. something to do.

Claims (3)

The speed and time setting section 30 for adjusting the curve angle of the electric driver, adjusting the high speed and low speed rotation speed, setting the time when the screwing abnormality is detected, and modulating the commercial power to a predetermined voltage and supplying them to each of the control apparatus. The power supply circuits 32 and 46, the screwing state detection circuit 34, which detects the screwing state and outputs a completion state when the screwing is completed, and outputs an error occurrence signal when an abnormal state is detected. A control unit 36 having a program embedded in an internal memory for controlling an operating state, a display unit 38 including a plurality of light emitting diodes for visually displaying all operating states of a control device, and displaying an external when an overcurrent is detected. The operation state of the external input and internal circuit insulation unit 42, the control device for blocking unnecessary signals input from outside the lamp driving circuit 40 for driving the lamp The number of blows adjusting unit 44 for displaying and adjusting the number of blows, an overcurrent detection and signal blocking circuit 48 for detecting an overcurrent and blocking a PWM signal, a gate unit 50 including a plurality of gate arrays, DC motor driver control device comprising a drive unit 52 for driving a specific portion of the control device, and the selection terminal (18). The method of claim 1, further comprising a detection sensor 26 for detecting the height of the wall fastening electric driver 28, and determining whether or not the screw is completely nailed by the input signal from the detection sensor 26. DC motor driver control device. 3. The DC motor driver control apparatus according to claim 2, wherein the detection sensor (26) is a device having a light receiving unit and a light emitting unit at the same time.