CN203317307U

CN203317307U - Electric screwdriver

Info

Publication number: CN203317307U
Application number: CN2013203142151U
Authority: CN
Inventors: 李江
Original assignee: ZHONGSHAN SAIDUN ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: ZHONGSHAN SAIDUN ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2013-06-03
Filing date: 2013-06-03
Publication date: 2013-12-04
Anticipated expiration: 2023-06-03

Abstract

The utility model discloses an electric screwdriver which comprises a motor connected with a control circuit. The control circuit comprises a single-chip microcomputer controller and a power supply circuit. An input end of the single-chip microcomputer controller is connected with a functional button, an impact time setting button, an encoding switch speed regulating button and a start-stop signal processing circuit, and the output end thereof is connected with a display, a motor controller and a pulse width control circuit. By the single-chip microcomputer technology, impact times of in-place screw locking can be set, 16-level speed regulation divided into a low gear, a middle gear and a high gear is provided, and functions of locking screw counting, warning of mounting missing, out-place locking and screw loose, and in-place locking prompt.

Description

A kind of electric screw driver

Technical field

The utility model relates to a kind of electric tool, particularly a kind of electric screw driver.

Background technology

Existing electric screw driver just, simply by powering to electric screw driver after 220 volts of civil power decompression rectifications, only is provided with the high and low shift change-over switch, does not have the relevant control function, operation quality requirements in the time of can not guaranteeing the electronic product assembling.

The utility model content

In order to overcome the deficiencies in the prior art, the utility model provides a kind of employing single-chip microcomputer to control, and can realize counting, and not in place, sliding tooth alarm is paid in many grades of speed governing, and lock is paid the electric screw driver of the prompt facility that puts in place.

The utility model solves the technical scheme that its technical problem adopts:

A kind of electric screw driver, comprise motor, and described motor is connected with control circuit, and described control circuit comprises singlechip controller and, for controller and motor provide the power circuit of working power, the input of described singlechip controller is connected with:

Function button: select for function;

Number of shocks arranges button: for the number of shocks of motor is set;

Code switch speed governing button: for inputting the rotating speed coding of motor;

The start stop signal treatment circuit, input is connected with motor, for feeding back the starting state of motor;

The output of described singlechip controller is connected with:

Display: for parameter and the duty that shows input;

Electromotor control circuit: output is connected with motor, for controlling the start and stop of motor;

Pulse width control circuit: be electrically connected to power circuit, for the power output of gauge tap power circuit.

Described power circuit comprises: step-down transformer BT, the output termination current rectifying and wave filtering circuit of described step-down transformer BT, the output of described current rectifying and wave filtering circuit divides two-way, one tunnel connects voltage-stabilized power supply, provide working power to singlechip controller, another road connects the switching power circuit that working power is provided for motor, the control signal end of the described switching power circuit of output termination of described pulse width control circuit.

The beneficial effects of the utility model are: electric screw driver of the present utility model adopts single-chip microcomputer control technology, has following advantage:

1, locked screw tally function, the neglected loading screw is reported to the police.

2, each 16 grades of speed governing of high and low shift.

When 3, locked screw puts in place, number of shocks can arrange.

4: screwed lock is paid warning indication not in place.

5: the sliding tooth alarm of screw.

6: screwed lock is paid the prompting that puts in place.

The accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is circuit block diagram of the present utility model.

The specific embodiment

With reference to Fig. 1, a kind of electric screw driver, comprise motor, and described motor is connected with control circuit, described control circuit comprises singlechip controller and, for controller and motor provide the power circuit of working power, the input of described singlechip controller is connected with:

Function button: select for function.

Number of shocks arranges button: for the number of shocks of motor is set, and the process of this number of shocks motor brake that is electric screw driver from starting to turn to screw locking.

Code switch speed governing button: for inputting the rotating speed coding of motor, adopt 4 binary-coded decimal code switch, singlechip controller reads the data of code switch, then exports the operating voltage of the Waveform Control motor of different frequency, realizes speed-regulating function.

The start stop signal treatment circuit, input is connected with motor, and for feeding back the starting state of motor, when starting handle is pressed, electric screw driver has high level output, and when screwed lock puts in place, electric screw driver can be exported a high level signal.

The output of described singlechip controller is connected with:

Display: for parameter and the duty that shows input.

Electromotor control circuit: output is connected with motor, for controlling the start and stop of motor, singlechip controller is checked through starting handle while pressing, output signal is controlled motor work, when starting handle unclamps or screwed lock is paid while putting in place, the work of singlechip controller output signal braking circuit, motor brake.

Pulse width control circuit: be electrically connected to power circuit, for the power output of gauge tap power circuit, adjust the rotating speed of motor.

Described power circuit comprises: step-down transformer BT, the 220V alternating current is become to the 24V alternating current, the output termination current rectifying and wave filtering circuit of described step-down transformer BT, the output of described current rectifying and wave filtering circuit divides two-way, one tunnel connects voltage-stabilized power supply, to provide+5V of singlechip controller working power, another road connects the switching power circuit that working power is provided for motor, the control signal end of the described switching power circuit of output termination of described pulse width control circuit, switching power circuit is pwm circuit, control dutycycle, just can change the voltage of output, to change power output, change the motor speed purpose thereby reach.

Motor of the present utility model adopts the singlechip technology Based Intelligent Control, has following function:

1, locked screw tally function, the neglected loading screw is reported to the police.This function adopts and subtracts counting, such as a workpiece will be locked 2 screws, sets 02, and every lock subtracts 1 while having paid a screw, and after lock has been paid 2 screws, charactron shows again 02.If a upper workpiece has only been locked 1 screw, lock first screw of next workpiece and will report to the police.

2, each 16 grades of speed governing of high and low shift.When different electronic products is assembled, need different rotating speed and torsion, such as electronic watch, during the high-accuracy assembling product of digital hard disk, adopt low speed to hang down moment of torsion, adjusting rotary speed, adapt to different workpiece demands as required.

When 3, locked screw puts in place, number of shocks can arrange.Some assembling products is used while being self-tapping screw, the torsion while adopting this function can increase lock to pay.

4: screwed lock is paid warning indication not in place, and such as screw is only thrown half into, the buzzer warning prompting, can guarantee the operation quality.

5: the sliding tooth alarm of screw.During the sliding tooth of screw, can rotate, system does not detect the stop signal input, will report to the police, can guaranteed quality always.

6: screwed lock is paid the prompting that puts in place, and screwed lock is paid while putting in place, and system detects stop signal, and it is good that the lock that screw is described is paid state.

Claims

1. an electric screw driver, comprise motor, described motor is connected with control circuit, it is characterized in that described control circuit comprises singlechip controller and, for controller and motor provide the power circuit of working power, the input of described singlechip controller is connected with:

Function button: select for function;

Number of shocks arranges button: for the number of shocks of motor is set;

The output of described singlechip controller is connected with:

Display: for parameter and the duty that shows input;

2. electric screw driver according to claim 1, it is characterized in that described power circuit comprises: step-down transformer BT, the output termination current rectifying and wave filtering circuit of described step-down transformer BT, the output of described current rectifying and wave filtering circuit divides two-way, one tunnel connects voltage-stabilized power supply, provide working power to singlechip controller, another road connects the switching power circuit that working power is provided for motor, the control signal end of the described switching power circuit of output termination of described pulse width control circuit.