Lawn mower

Abstract

Disclosed herein is a lawn mower including a motor housing for vertically enclosing a motor; and a cutter casing disposed below the motor housing for housing a cutter fitted to the lower extremity of the shaft of the motor. The cutter casing is connected to the motor housing in such a manner that they communicate with each other. The cutter casing has at the upper portion thereof air-passing ports vertically extending therethrough. There is provided on the cutter casing a shroud for enclosing the motor housing, and the shroud has at a portion thereof apertures opening to communicate with the atmosphere; and air inlets opening to communicate through an air filter with the interior of the motor housing. In the cutter casing and above the cutter, there are provided an air impeller for creating a flow of air to support the mower on a cushion of air; and an axial impeller for cooling the motor. Both impellers are fitted to the motor shaft such that the axial impeller overlies the air impeller. The air impeller is adapted to draw air through the apertures and the air-passing ports to generate an air cushion in conjunction with said cutter casing. The axial impeller is adapted to create an air flow streaming down in the motor housing through the air inlets so as to cool the motor.