CN-115816358-B - Electric drill anti-twisting control device and control method
Abstract
The invention relates to the technical field of electric drills, in particular to an electric drill anti-twist control device and a control method, wherein the electric drill anti-twist control device comprises a motor, a torque transmission device and a control assembly, and the control assembly comprises a switch detection device, a current detection device, a working mode switching unit and an MCU control unit; the electric power tool comprises a tool body, a current detection device, an MCU control unit, a working mode switching unit, a rotating working unit and a pulse impact working unit, wherein the current detection device is electrically connected with a switch, the current detection device is electrically connected with a motor, the MCU control unit is electrically connected with the current detection device, the working mode switching unit is electrically connected with the MCU control unit and the motor, the working mode switching unit comprises the rotating working unit and the pulse impact working unit, the MCU control unit switches the working mode switching unit according to working current flowing through the motor, the MCU control unit compares the working current detected by the current detection device with the rotating working unit and the pulse impact working unit, the working mode of the motor is switched, the maximum output torque of the tool is kept, and meanwhile, the reactive torque is prevented from being excessively applied to the tool body.
Inventors
- Zhong Guoyou
- LI QIUJUN
- CHEN YUXING
Assignees
- 锐奇控股股份有限公司
- 浙江锐奇工具有限公司
Dates
- Publication Date
- 20260512
- Application Date
- 20221219
Claims (2)
- 1. The electric drill anti-twisting control method is characterized by comprising the following steps of: s1, detecting a switch state through a switch detection device; s2, if the switch detection device in S1 detects that the switch state is on, the current detection device detects the working current A flowing through the motor; s3, comparing the working current A in the S2 with a rotation protection current value B of a rotation working unit in the working mode switching unit through the MCU control unit; S4, if the working current A is smaller than the rotation protection current value B, the working mode switching unit is a rotation working unit, the MCU control unit controls the motor to drive through the rotation working unit, and the motor is in a normal working mode; s5, if the working current A reaches the rotation protection current value B, the MCU control unit compares the working current A in S2 with the impact protection current value C of the pulse impact working unit in the working mode switching unit; s6, if the working current A is smaller than the impact protection current value C, the working mode switching unit is a pulse impact working unit, the MCU control unit controls the motor to drive through the pulse impact working unit, and the motor is in a torque-proof working mode; Further comprises: A motor for providing rotational power; a torque transmitting device for transmitting rotational kinetic energy of the motor; The control assembly comprises a switch detection device, a current detection device, a working mode switching unit and an MCU control unit, wherein the switch detection device is electrically connected with a switch and used for detecting the state of the switch, the current detection device is electrically connected with a motor and used for detecting working current flowing through the motor, the MCU control unit is electrically connected with the current detection device, the working mode switching unit is electrically connected with the MCU control unit and the motor, the working mode switching unit comprises a rotary working unit and a pulse impact working unit, the rotary protection current value of the rotary working unit is smaller than the impact protection current value of the pulse impact working unit, the duration time of the rotary working unit is longer than the duration time of the pulse impact working unit, and the MCU control unit switches the working mode switching unit according to the working current flowing through the motor.
- 2. The electric drill anti-twist control method according to claim 1, wherein in step S4, if the operation current a is smaller than the rotation protection current value B, whether the switch is pressed down is continuously detected by the switch detecting means, and the operation current a in S2 is compared with the rotation protection current value B of the rotation operation unit in the operation mode switching unit again by the MCU control unit.
Description
Electric drill anti-twisting control device and control method Technical Field The invention relates to the technical field of electric drills, in particular to an electric drill anti-twisting control device and a control method. Background In the conventional electric drill, when a drill bit is accidentally locked during drilling operation for a processed material, an excessive torque is generated opposite to the rotation direction of the drill bit, namely, a reaction torque acts on a tool main body, so that the tool main body is driven to swing by the excessive reaction torque, and the operator's hand is injured by the excessive swing amplitude. In order to realize the anti-twisting function, two main schemes are adopted, namely, 1, an acceleration sensor or a gyroscope sensor is used for detecting the change of a rotation angle and stopping the driving of a motor to realize the anti-twisting function, and 2, a mechanical clutch mode is used for cutting off the torque transmission when the release value of the clutch is exceeded to realize the anti-twisting function. However, the prior art has the defects that 1, an acceleration sensor or a gyroscope sensor is added on a control board assembly, the cost is high, and 2, the conventional mechanical clutch is added between a motor and a driving mechanism for rotating a tool bit, so that the structure is large, and the appearance is influenced. Disclosure of Invention In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an electric drill anti-twisting control device and a control method thereof, which are used for solving the problems of high cost and large occupied space in the prior art. The aim of the invention can be achieved by the following technical scheme: an electric drill anti-twist hand control device, comprising: A motor for providing rotational power; a torque transmitting device for transmitting rotational kinetic energy of the motor; The control assembly comprises a switch detection device, a current detection device, a working mode switching unit and an MCU control unit, wherein the switch detection device is electrically connected with a switch and used for detecting the state of the switch, the current detection device is electrically connected with a motor and used for detecting working current flowing through the motor, the MCU control unit is electrically connected with the current detection device, the working mode switching unit is electrically connected with the MCU control unit and the motor, the working mode switching unit comprises a rotary working unit and a pulse impact working unit, the rotary protection current value of the rotary working unit is smaller than the impact protection current value of the pulse impact working unit, the duration time of the rotary working unit is longer than the duration time of the pulse impact working unit, and the MCU control unit switches the working mode switching unit according to the working current flowing through the motor. An electric drill anti-twist control method comprises the following steps: s1, detecting a switch state through a switch detection device; s2, if the switch detection device in S1 detects that the switch state is on, the current detection device detects the working current A flowing through the motor; s3, comparing the working current A in the S2 with a rotation protection current value B of a rotation working unit in the working mode switching unit through the MCU control unit; S4, if the working current A is smaller than the rotation protection current value B, the working mode switching unit is a rotation working unit, the MCU control unit controls the motor to drive through the rotation working unit, and the motor is in a normal working mode; s5, if the working current A reaches the rotation protection current value B, the MCU control unit compares the working current A in S2 with the impact protection current value C of the pulse impact working unit in the working mode switching unit; And S6, if the working current A is smaller than the impact protection current value C, the working mode switching unit is a pulse impact working unit, the MCU control unit controls the motor to drive through the pulse impact working unit, the motor is in a torque-proof working mode, and if the working current A reaches the impact protection current value C, the MCU control unit turns off the motor to stop rotating. In a further improvement, in the step S4, if the working current a is smaller than the rotation protection current value B, the switch detecting device continues to detect whether the switch is pressed down, and the MCU control unit compares the working current a in the step S2 with the rotation protection current value B of the rotation working unit in the working mode switching unit again. Compared with the prior art, the electric drill anti-twist control device and the control method have the beneficial effects that: