Lift assembly for a lawnmower and lawnmower having same

A lawnmower comprising:

• a mower housing lift assembly that includes,
• a mower housing that rotatably supports blades for cutting vegetation,
• two frame members,
• at least one pivot bar extending between the two frame members, the pivot bar including an arm non-rotatably connected to the pivot bar at a first location on the pivot bar,
• an actuator provided between the two frame members and connected to the pivot bar at the arm to impart rotation to the pivot bar about a rotational axis of the pivot bar, and
• a pair of first cams affixed to the pivot bar at a respective second location on the pivot bar that is spaced away from the first location, each of the first cams rotating about the rotational axis of the pivot bar when the pivot bar rotates, at least one of the first cams including a mower housing attachment element connected to the mower housing such that a distance from the two frame members to the mower housing changes upon rotation of the at least one of the first cams;
• and
• a prime mover operatively connected to the blades so as to rotate the blades during operation.

A lift assembly for a lawnmower, comprising:

• a mower housing that houses blades for cutting vegetation;
• a frame that includes a frame cross member;
• a first pivot bar;
• an actuator located between the frame cross member and the first pivot bar and configured to impart rotation to the first pivot bar about a first pivot bar rotational axis;
• first cams affixed to the first pivot bar, at respective attachment points on the first pivot bar, so as to rotate with the first pivot bar;
• a first mower housing attachment element attached to each of the first cams and configured to support the mower housing at varying height positions dependent on rotational position of the first cams;
• a second pivot bar and second cams affixed to the second pivot bar, at respective attachment points of the second pivot bar, so as to rotate with the second pivot bar;
• a second mower housing attachment element attached to each of the second cams and configured to support the mower housing at varying height positions dependent on rotational position of the second cams;
• and
• a first link arm and a second link arm, the first link arm connecting one of the first cams to one of the second cams, and the second link arm connecting another of the first cams to another of the second cams, wherein
• the first pivot bar includes an arm that is non-rotatably affixed to the first pivot bar at a first location on the first pivot bar, and the actuator is attached at the arm and to the frame cross member such that operation of the actuator results in rotation of the arm and first pivot bar about the first pivot bar rotational axis, and
• wherein the respective attachment points for the first cams are spaced away from the first location.