Mowing apparatus

A mowing apparatus comprising:

• a motive power source for supplying rotational motion;
• a pair of first and second cutting wheels slidably superposed with each other and each of the wheels being provided with a number of grass cutting edges;
• and
• means for reciprocatively rotating each cutting wheel in opposite directions through a predetermined angle, respectively, the rotating means comprising a first shaft coupled to the first wheel, a cylindrical-shaped second shaft into which the first shaft is rotatably and coaxially inserted and coupled to the second wheel, and converting means provided between the power source and the first and second shafts for converting the rotational motion from the motive power source into two oppositely and reciprocatively rotational motions of the first and second shafts within the predetermined angle,
• wherein the converting means comprises:
• a cam shaft rotatably driven by the motive power source, the cam shaft being provided in parallel with the first and second shafts;
• first and second eccentric cam plates which are eccentrically fixed to the cam shaft in vertical direction thereof so as to be radially symmetrical with each other with respect to a central axis of the cam shaft;
• and
• first and second arms each having opposite ends, a concave portion being formed at one end thereof, and the other ends of the first and second arms being coupled to the first and second shafts, respectively, each concave portion of the first and second arms being adapted to receive each of the first and second cam plates, respectively, in such a manner that the first and second arms can be pivotably oscillated in mutually opposite directions to each other in accordance with the rotation of the first and second cam plates, whereby the first and second cutting wheels being reciprocatively rotated relative to each other toward opposite directions about an axis of the shafts through the predetermined angle.