KR19990004303U - DC motor driver control device - 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 process flow and 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

DC motor driver control device

The present invention relates to a direct current driver control device with a 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.

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 driver uses screws in a hard surface such as a concrete wall by using the power of the built-in motor, and then hits it with a strong pressure to completely attach it to the wall, thus efficiently performing a task that cannot be performed by manpower efficiently and reliably. .

However, it is difficult to remotely control the electric driver that is normally used by the user, and it is difficult to adjust the rotational speed of the motor and the number of hits after the screw is stuck on the wall according to the strength of the wall where 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 blows 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, the high speed and low speed rotation speed, and setting the time when the screwing abnormality is detected ); Power supply circuits 32 and 46 for modulating the commercial power to a predetermined voltage and supplying them to the control device, respectively; 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; A process flow detection and signal blocking circuit 48 for detecting the process flow and blocking the PWM signal to block the process flow; 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 it is characterized by consisting of a selection terminal 18 for operating the motor to screw.

Figure 1a is a front view of a direct current driver control device according to the present invention, Figure 1b is a selection terminal located on the rear of the control device to operate the direct current electric driver,

Figure 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 an operating state of the soft start function according to the present invention;

Figure 4a, Figure 4b is a time difference art showing the operating state of the L, H function according to the present invention,

5 is a schematic view showing the configuration of the screw screw state detection sensor according to the present invention,

6A and 6B are detailed circuit diagrams of a DC motor driver control apparatus of the present invention.

* Description of the symbols for the main parts of the drawings *

10: control device 12: power switch

14 front panel 16 connector

18: Selection terminal 20: Wall

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 adjustment 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.

Figure 1a is a front view of the DC motor driver control device 10 of the present invention, the front panel 14 is provided with a plurality of display lamps and regulators for displaying the operating state of the power switch 12 and the control device. Display lamps include power display, drive status display, and end display, and include reverse lamp 14a, soft start lamp 14b, delay-cancellation lamp 14c, low-high lamp 14d, and error display lamp. 14e), 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 14i, and the like are provided. It is apparent to those skilled in the art that the display lamps can be configured using a light emitting diode (LED) or the like.

Figure 1b is a terminal for selecting the operation of the motor, the reverse function is performed when a predetermined power is applied to the common terminal and the reverse terminal, the soft start function is performed when the power is connected to the common terminal and 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. For the operation state of the reverse function, referring to Figure 2, if the reverse function is turned on while the screwdriver is stopped, the screwdriver is rotated reversely, which is operated independently of the drive signal and the torque signal. 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. In Fig. 2, the applied voltages of the drive, the torque, and the reverse on are shown.

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. If the drive input is turned on in the on state, the soft start function is a non-speed rotation until the on state. The speed is increased from the off point 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. If the drive input is on when the soft start function is off, normal full-speed operation is performed. If 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 is shifted to high speed if it is on again, and to low speed if it is turned off. Speed adjustment of low speed and high speed is performed by the speed-low and speed-high setting volumes 14g and 14h installed in the front panel 14, and the transition time is adjusted using the delay time setting volume 14i. . 4A and 4B, L and H represent an input in a low-high operating state, drive represents a drive input, torque represents a torque state, driver represents an electric driver, and cancle represents a cancellation.

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

As shown, the main body of the electric screwdriver 28 when the screw 22 is normally nailed to the wall surface 20 when the screw 22 is nailed to the wall surface 20 by the rod 24 of the electric screwdriver 28. Is advanced, and at this time, the 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 surface 20, the body of the screwdriver 28 is not moved, and thus the main body cannot be detected by the sensor 26, and thus the electrical A 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 a bolting time. If the torque-in signal is not input for 3 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 low speed rotation (0 to 50% of motor rotation) when using the L and H functions. 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 a control device for a DC motor driver according to the present invention, and are broadly classified as follows: Adjusting a curve angle of an electric driver, adjusting a high speed and a low speed rotation speed, and detecting a screwing abnormality. A speed and time setting unit 30 for setting the time of day; Power supply circuits 32 and 46 for modulating the commercial power to a predetermined voltage and supplying them to the control device, respectively; 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 driving unit 52 for driving a specific portion of the control device; And a selection terminal 18.

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). 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 you set to 6 seconds using the volume (VR4), screwing after 6 seconds have elapsed If this is not completed, it is determined as abnormal.

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. , Modulates AC8V to DC5V by capacitors C02, C03, C04, C05, C06, and integrated circuit IC1, and 46 (FIG. 6B) shows bridge rectification diodes D30 and capacitors C08, C09, and C10. , C11, C03, C04) and the AC22V are rectified by the 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 an error occurrence 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 RY1 shown in FIG. 6B by the integrated circuit U04B, the resistor R13, and the transistor Q01 to display the completion of the filling external output. In addition, the screwing abnormality detection circuit outputs the screwing abnormality generation to the outside by the resistor R22, the diode D20, the transistor Q02, the resistor R16, and the relay RY1.

The controller 36, which controls all operating states of the control device and has a program embedded in the internal memory device of the integrated circuit, includes a microprocessor U02, an oscillator (OSC), and peripheral circuit capacitors C31, C32, and C123, and a resistor. (R19) and a diode D14.

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 turns on when the screwing abnormality is detected, the light emitting diode D21 turns on when the high speed ↔ low speed conversion is made, the light emitting diode D22 turns on 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-14e installed in the front panel 14 of FIG. 1A.

The lamp driving circuit 40 which drives the lamp to be displayed externally when an overcurrent is detected is composed of a resistor R29, an integrated circuit U04F, a resistor R30, a transistor Q05, a resistor R31, and overcurrent detection. 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 when connecting the circuits of FIGS. It is to block the signal.

In addition, the blow count adjusting unit 44 for displaying the operation state of the control device of the present invention and adjusting the blow count, the power indicator lamp (LED1), driving and overcurrent detection indicator lamp (LED2), screw It is composed of a push completion display lamp LED3 and a switch SW1 for adjusting the hitting times (1, 2, 3 times).

The overcurrent detection and signal blocking circuit 48 for detecting the overcurrent and for blocking the PWM signal detects the overcurrent by the resistors R24 and R27, the capacitor C33 and the SCR, and the transistor Q07 and the resistor R13. R14 is operated to supply the integrated circuit U04B to block the PWM signal.

In addition, the gate unit 50 includes a plurality of gate arrays, and the integrated circuit U04B protects the driving circuit by blocking the PWM signal when the CW and CCW are simultaneously supplied or the overcurrent detection circuit is operated. In addition, the integrated circuit U04A turns on the transistors Q01 and Q04 when the CW and CCW are absent so that the brake is applied. In addition, the integrated circuit U03A detects and applies the integrated circuit U04B when the CW and the CCW are generated at the same time. CW means clockwise and CCW means COUNTERCLOCKWISE.

In addition, the driving unit 52 is for driving a specific part of the control device, and the transistors Q03 and Q11 operate as a drive by PWM during CW. The transistors Q01 and Q14 are turned on at the time of CW, and are turned on at the brake operation in the absence of the CW and CCW. At CW rotation, (+)-Q11-Driver-Q14-(-). Transistors Q02 and Q12 operate as a drive by PWM during CCW. The transistors Q04 and Q13 are turned on at CCW, and are turned on at break operation in the absence of CW and CCW. When CCW is rotated, it becomes (+)-Q12-Driver-(-). In the absence of CW or CCW, the brake operation constitutes a closed circuit of the transistors Q13 and Q19 and the electric driver, or constitutes a closed circuit of the transistors Q14 and Q18 and the electric driver to cause the 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). In this state, when power is applied to the soft start terminal 18-5 and the common terminal 18-3 of the selection terminal 18 installed at the rear side, the DC motor driver 28 starts to rotate and the screw 22 It begins to get stuck in the wall 20. If the screw is completely lodged so that the shaft of the electric driver 28 can no longer rotate, the electric driver 28 automatically stops after the blow by the adjusted number of strokes and sends a completion signal.

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 (reverse rotation function) when performing the initial positioning operation of the screw. In addition, when using a screw of a thin shape, the rotation speed is gradually increased by the soft start function can be useful for positioning the screw. Moreover, various types of screws can be used since the low speed, high speed, switching operation with time delay and the low speed, high speed, switching operation without time delay can be performed.

It also has the function of detecting 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 screwing completely. 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 that the present invention may be modified or changed within the spirit and scope of the present invention. something to do.

Claims (3)

A speed and time setting unit 30 for adjusting the curve angle of the electric driver, adjusting the high speed and the low speed rotation speed, and setting the time when the screwing abnormality is detected; 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 process flow and 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). 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 stuck 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.