Blade assembly for a grass cutting mobile robot
First Claim
Patent Images
1. A grass cutting mobile robot comprising:
- a body; and
a blade assembly connected to the body and rotatable about a drive axis, the blade assembly comprising;
two or more blades, wherein, for each of the two or more blades, the blade is rotatably mounted on a mounting axis and includes a cutting portion extending inwardly toward the drive axis from a blade tip; and
a housing to hold the two or more blades, wherein, for each of the two or more blades, at least a portion of the blade extends upward from the mounting axis, through the housing, and relative to a horizontal ground surface so that, in response to an impact, the portion of the blade is configured to move within the housing towards the drive axis by rotating about the mounting axis of the blade to cause the cutting portion of the blade to move upward relative to the horizontal ground surface toward the body and to reduce a tip radius defined by the blade tip and the drive axis as the blade tip rotates about the drive axis.
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Accused Products
Abstract
A grass cutting mobile robot includes a body and a blade assembly connected to the body and rotatable about a drive axis. The blade assembly includes blades, a housing to hold the blades, and a spring that connects the blade to the housing. The housing includes a slot in which to mount a blade so that a portion of the blade is movable through the slot towards another blade in response to an impact. The slot slopes upwards in the housing towards the body, thereby enabling the blade to move upwards relative to a ground surface toward the body in response to the impact. The spring is for constraining movement of the blade relative to the housing.
332 Citations
29 Claims
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1. A grass cutting mobile robot comprising:
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a body; and a blade assembly connected to the body and rotatable about a drive axis, the blade assembly comprising; two or more blades, wherein, for each of the two or more blades, the blade is rotatably mounted on a mounting axis and includes a cutting portion extending inwardly toward the drive axis from a blade tip; and a housing to hold the two or more blades, wherein, for each of the two or more blades, at least a portion of the blade extends upward from the mounting axis, through the housing, and relative to a horizontal ground surface so that, in response to an impact, the portion of the blade is configured to move within the housing towards the drive axis by rotating about the mounting axis of the blade to cause the cutting portion of the blade to move upward relative to the horizontal ground surface toward the body and to reduce a tip radius defined by the blade tip and the drive axis as the blade tip rotates about the drive axis. - View Dependent Claims (2, 3, 4, 25, 26, 27, 28)
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5. A grass cutting mobile robot comprising:
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a body; and a blade assembly connected to the body and rotatable about a drive axis, the blade assembly comprising; blades; a housing to hold the blades, the housing comprising a slot in which to mount a blade of the blades so that a portion of the blade is movable through the slot towards another blade of the blades in response to an impact, and the slot sloping upwards along an outer surface of the housing towards the body, thereby enabling the blade to move upwards relative to a ground surface toward the body in response to the impact; and a spring that connects the blade to the housing, the spring for constraining movement of the blade relative to the housing. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A blade assembly for a grass cutting mobile robot, comprising:
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blades; and a housing to hold the blades and configured for coupling to an actuator of the grass cutting mobile robot so that the housing is rotatable about a drive axis, wherein, for each of the blades, at least a portion of a blade extends upward and outward from a mounting axis at which the blade is mounted to the housing such that the blade is movable upward and towards another blade in response to an impact. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 29)
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Specification