20V Lithium Battery 400N.m brushless Impact Wrench

A lithium impact wrench is a type of power tool that uses lithium-ion batteries to drive its motor. The principle behind its operation involves converting the electrical energy from the battery into mechanical energy, which is used to generate high torque output suitable for loosening or tightening bolts and nuts. Here's a detailed look at how a lithium impact wrench works:

Key Components

Lithium-Ion Battery: Provides the electrical energy needed to power the wrench. Lithium-ion batteries are preferred for their high energy density, long lifespan, and relatively light weight.

Electric Motor: Converts electrical energy from the battery into mechanical energy. Most lithium impact wrenches use a brushless DC motor, which is more efficient and durable than brushed motors.

Hammer and Anvil Mechanism: This is the core component that generates the impact. The motor drives a rotating mass (hammer) that periodically strikes a stationary part (anvil), producing high torque pulses.

Gearbox: Transmits the mechanical energy from the motor to the hammer and anvil mechanism, often increasing the torque while reducing the speed.

Trigger and Speed Control: Allows the user to control the speed and power of the wrench.

Working Principle

Power Supply: When the user presses the trigger, the battery supplies electrical power to the motor.

Motor Activation: The electric motor starts running, converting the electrical energy into rotational mechanical energy.

Rotation Transfer: The rotational energy from the motor is transferred through the gearbox to the hammer mechanism.

Impact Generation:

The rotating hammer accelerates and strikes the anvil.

The impact from the hammer to the anvil generates a high torque pulse.

This pulse is transmitted to the output shaft, which is connected to the socket holding the bolt or nut.

Repetitive Impacts: The hammer continuously strikes the anvil, producing repeated high-torque impacts. This allows the wrench to effectively loosen or tighten fasteners that require a significant amount of torque.

Advantages of Lithium-Ion Impact Wrenches

Portability: Being battery-powered, they are not restricted by a cord, allowing for use in various locations, including remote or hard-to-reach places.

Power and Efficiency: Lithium-ion batteries provide high power output and efficiency, enabling the tool to deliver strong torque.

Long Battery Life: Lithium-ion batteries have a longer lifespan and better energy density compared to other types of batteries, reducing the frequency of recharges.

Reduced Maintenance: Brushless motors in these wrenches require less maintenance and have a longer operational life compared to brushed motors.

Applications

Lithium impact wrenches are widely used in automotive repair, construction, assembly lines, and any other application where high torque is required to tighten or loosen bolts and nuts. They are especially useful for tasks where speed and efficiency are critical, and manual wrenches would be too slow or physically demanding.

In summary, the principle of a lithium impact wrench revolves around converting electrical energy from a lithium-ion battery into mechanical energy through a motor and using a hammer and anvil mechanism to generate high torque impacts, making it an effective and versatile tool for a variety of applications.