Blade assembly for a grass cutting mobile robot
First Claim
Patent Images
1. A grass cutting mobile robot comprising:
- a drive system operable to navigate the robot about a mowable area; and
a blade assembly comprising a housing and a blade to cut vegetation on the mowable area, the blade comprising;
a first portion extending outwardly from the housing and defining a longitudinal axis, a proximal end of the first portion mounting the blade to the housing on a mounting axis at a non-parallel angle to a vertical axis;
a second portion extending from a distal end of the first portion at an angle to the longitudinal axis; and
a third portion extending from a distal end of the second portion in a direction parallel to the longitudinal axis, the third portion being offset by a distance from the first portion, and a distal end of the third portion being angled in a first direction with respect to the longitudinal axis and tapered in a second direction with respect to the longitudinal axis to form a blade cutting tip, the third portion of the blade comprising a cutting portion configured to cut the vegetation on the mowable area, the cutting portion of the blade being coincident with a radial axis of the blade assembly.
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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.
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Citations
23 Claims
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1. A grass cutting mobile robot comprising:
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a drive system operable to navigate the robot about a mowable area; and a blade assembly comprising a housing and a blade to cut vegetation on the mowable area, the blade comprising; a first portion extending outwardly from the housing and defining a longitudinal axis, a proximal end of the first portion mounting the blade to the housing on a mounting axis at a non-parallel angle to a vertical axis; a second portion extending from a distal end of the first portion at an angle to the longitudinal axis; and a third portion extending from a distal end of the second portion in a direction parallel to the longitudinal axis, the third portion being offset by a distance from the first portion, and a distal end of the third portion being angled in a first direction with respect to the longitudinal axis and tapered in a second direction with respect to the longitudinal axis to form a blade cutting tip, the third portion of the blade comprising a cutting portion configured to cut the vegetation on the mowable area, the cutting portion of the blade being coincident with a radial axis of the blade assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 19)
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11. A blade assembly for a grass cutting mobile robot, the blade assembly comprising:
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a blade; and a housing to hold the blade, the housing configured for coupling to an actuator of the grass cutting mobile robot so that the housing is rotatable about a drive axis and so that the blade cuts vegetation on a mowable area, wherein the blade comprises; a first portion extending outwardly from the housing and defining a longitudinal axis, a proximal end of the first portion mounting the blade to the housing; a second portion extending from a distal end of the first portion at an angle to the longitudinal axis; and a third portion extending from a distal end of the second portion in a direction parallel to the longitudinal axis, the third portion being offset by a distance from the first portion, and a distal end of the third portion being angled in a first direction with respect to the longitudinal axis and tapered in a second direction with respect to the longitudinal axis to form a blade cutting tip, the third portion of the blade comprising a cutting portion configured to cut the vegetation on the mowable area, the cutting portion of the blade being coincident with a radial axis of the blade assembly. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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20. A grass cutting mobile robot comprising:
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a drive system operable to navigate the robot about a mowable area; and a blade assembly comprising a housing and a blade to cut vegetation on the mowable area, the blade comprising; a first portion extending outwardly from the housing at a nonparallel angle with a radial axis of the blade assembly and defining a longitudinal axis, a proximal end of the first portion mounting the blade to the housing; a second portion extending from a distal end of the first portion at an angle to the longitudinal axis; and a third portion extending from a distal end of the second portion in a direction parallel to the longitudinal axis, the third portion being offset by a distance from the first portion, and a distal end of the third portion being angled in a first direction with respect to the longitudinal axis and tapered in a second direction with respect to the longitudinal axis to form a blade cutting tip corresponding to an outermost point of the blade, wherein the third portion comprises a cutting portion configured to cut vegetation on the mowable area and coincident with the radial axis of the blade assembly. - View Dependent Claims (21, 22, 23)
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Specification