https://www.g-wei.com.cn/The-Mechanics-of-a-Trigger-Start-Type-Electric-Screwdriver.html
The Basic Components
Dongguan Gewei Electronic Co., Ltd. is a professional manufacturer of trigger start type electric screwdriver. To understand the working principle of a trigger start type electric screwdriver, it is essential to first familiarize ourselves with its key components:
1. Motor: The heart of the electric screwdriver, the motor converts electrical energy into mechanical energy, providing the rotational power needed to drive screws.
2. Gearbox: This component is responsible for transferring the motor's high-speed rotation into a more usable form, often reducing the speed while increasing the torque. The gearbox ensures that the screwdriver can apply sufficient force to turn screws effectively.
3. Trigger Switch: This is the control mechanism that the user interacts with directly. Pressing the trigger completes the electrical circuit, allowing power to flow to the motor and initiating the rotation.
4. Battery or Power Supply: Depending on the model, the screwdriver may be cordless (battery-powered) or corded (plugged into an electrical outlet). The power source provides the necessary electrical energy to drive the motor.
5. Chuck and Bit: The chuck holds the screwdriver bit in place, while the bit itself is the part that makes contact with the screw head. The bit comes in various types and sizes to match different screw heads.
The Working Principle: A Step-by-Step Explanation
Now that we have a grasp of the components, let's explore how they work together to make the electric screwdriver function:
Step 1: Activation via the Trigger
When you press the trigger on the electric screwdriver, it completes an electrical circuit. This action sends a signal to the motor, which begins to rotate. The trigger is designed to offer variable speed control; the harder you press it, the faster the motor spins. This feature allows users to adjust the speed according to the task at hand, ensuring precision and control.
Step 2: Power Transmission to the Motor
Once the circuit is completed, electrical energy flows from the battery or power supply to the motor. The motor converts this electrical energy into mechanical energy, producing rotational motion. This is a crucial step, as the motor's performance directly affects the screwdriver's efficiency and power.
Step 3: Gearbox Functionality
The motor's high-speed rotation is not directly suitable for driving screws, as it lacks the necessary torque. This is where the gearbox comes into play. The gearbox consists of a series of gears that reduce the speed of the motor's rotation while increasing the torque. This transformation is essential because screws require a combination of speed and force to be driven effectively. The gearbox ensures that the screwdriver can apply sufficient pressure to turn screws without stripping them.
Step 4: Power Transfer to the Bit
After the gearbox has adjusted the speed and torque, the rotational power is transferred to the chuck. The chuck holds the screwdriver bit securely in place. The bit, which is inserted into the chuck, makes direct contact with the screw head. As the bit rotates, it engages with the screw, applying the necessary force to drive it into or out of the material.
Step 5: Final Execution
With the bit rotating at the desired speed and torque, the user simply needs to align the bit with the screw head and apply gentle pressure. The electric screwdriver does the rest, turning the screw with precision and efficiency. The process is smooth and controlled, thanks to the seamless integration of the motor, gearbox, trigger, and bit.
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Dongguan Gewei Electronic Co., Ltd.
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