Power tool

A power tool comprising:

• a housing, a power assembly installed inside the housing, a fan assembly connected to the power assembly, and a bottom plate assembly driven by the power assembly,
• the power assembly comprising a motor axis,
• the fan assembly comprising a mounting plate connected to the power assembly, and cooling fan blades and dust collection fan blades arranged on the mounting plate, the mounting plate comprising a first surface and a second surface on opposite sides, the cooling fan blades arranged on the first surface and the dust collection fan blades arranged on the second surface;
• a number of the cooling fan blades is greater than a number of the dust collection fan blades;
• wherein the dust collection fan blades comprise at least one first counterweight fan blades that is partially thickened, the cooling fan blades comprise at least one second counterweight fan blades that is partially thickened, a thickness of the first counterweight fan blades is greater than that of the second counterweight fan blades.

A power tool comprising:

• a housing, a power assembly installed inside the housing, a fan assembly connected to the power assembly, and a bottom plate assembly driven by the power assembly,
• the power assembly comprising a motor axis,
• the fan assembly comprising a mounting plate connected to the power assembly, the mounting plate comprising a first surface and a second surface on opposite sides, the first surface defining a waist hole that extends through the mounting plate, and the fan assembly further comprising an eccentric element protruding from the second surface, the eccentric element comprising a first axis in a radial direction, and the mounting plate comprising a second counterweight block protruding from a periphery, an end surface of the waist hole facing the second counterweight block comprising a second axis;
• wherein the first axis and the second axis form a phase angle, and an angle of the phase angle approaches zero.