Robotic mower height of cut adjustment assembly
First Claim
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1. A robotic mower height of cut adjustment assembly, comprising:
- a height of cut drum secured to a bottom chassis of the robotic mower and having an internal circumferential surface with spiral threads having detents;
a motor cup supporting a cutting blade motor and having an external circumferential surface with spiral threads that engage the height of cut drum, the spiral threads on the motor cup having detents;
a blade shield fastened to the motor cup;
the blade shield and the motor cup are rotatable to change height of cut, the detents on the height of cut drum engaging the detents on the motor cup to hold and maintain the blade shield and motor cup at a plurality of different heights of cut.
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Abstract
A height of cut adjustment assembly for a robotic mower includes a height of cut drum secured to a bottom chassis of the robotic mower and having internal spiral threads, a motor cup supporting a cutting blade motor and having external spiral threads that engage the height of cut drum, and a blade shield fastened to the motor cup. The blade shield and the motor cup may be rotated to change height of cut. The blade shield and motor cup may be rotated one revolution to move the motor cup and blade shield vertically between a minimum and a maximum cutting height. Detents engage the motor cup with the drum at a plurality of different cutting heights.
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Citations
13 Claims
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1. A robotic mower height of cut adjustment assembly, comprising:
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a height of cut drum secured to a bottom chassis of the robotic mower and having an internal circumferential surface with spiral threads having detents; a motor cup supporting a cutting blade motor and having an external circumferential surface with spiral threads that engage the height of cut drum, the spiral threads on the motor cup having detents; a blade shield fastened to the motor cup; the blade shield and the motor cup are rotatable to change height of cut, the detents on the height of cut drum engaging the detents on the motor cup to hold and maintain the blade shield and motor cup at a plurality of different heights of cut. - View Dependent Claims (2, 3, 4, 5)
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6. A robotic mower height of cut adjustment assembly, comprising:
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a cylindrical height of cut drum mounted to and extending through an opening in a bottom chassis; a blade motor mounted in a motor cup and engaging the height of cut drum at a plurality of different cutting heights, each cutting height defined by detents in a helical thread path on the motor cup and on the height of cut drum that engage to hold and maintain the motor cup relative to the height of cut drum at a plurality of cutting heights. - View Dependent Claims (7, 8, 9)
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10. A robotic mower height of cut adjustment assembly, comprising:
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an electric motor having a vertical shaft attached to a cutting blade, the motor mounted in a motor cup, the motor cup having a threaded external circumferential surface engaged to a threaded internal circumferential surface of a height of cut drum so that the motor cup is rotatable with respect to the drum to raise and lower the motor cup, and a plurality of detents along the threaded surfaces of the motor cup and drum that engage to hold and maintain the motor cup relative to the drum at a plurality of different heights of cut. - View Dependent Claims (11, 12, 13)
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Specification