US 12,453,304 B2
Robotic lawnmower cutting deck with an angle adjustment arrangement, and a robotic lawnmower comprising such a cutting deck
Svante Larsson, Eksjö (SE); Stefan Toppe, Huskvarna (SE); and Jonatan Wendel, Jönköping (SE)
Assigned to HUSQVARNA AB, Huskvarna (SE)
Filed by HUSQVARNA AB, Huskvarna (SE)
Filed on Apr. 27, 2022, as Appl. No. 17/730,664.
Claims priority of application No. 2150530-0 (SE), filed on Apr. 27, 2021.
Prior Publication US 2022/0338410 A1, Oct. 27, 2022
Int. Cl. A01D 34/74 (2006.01); A01D 34/00 (2006.01); A01D 101/00 (2006.01)
CPC A01D 34/008 (2013.01) [A01D 34/74 (2013.01); A01D 2101/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A robotic lawnmower cutting deck comprising a cutting system which in turn comprises at least two cutters, each cutter comprising a cutting disc and a corresponding cutter motor, each cutting disc being drivably connected to the corresponding cutter motor, wherein the cutters are supported by a cutter support beam having a longitudinal beam extension and in turn being supported at respective supporting positions by a corresponding first link arm and a corresponding second link arm, wherein, at each of the respective supporting positions:
the link arms are pivotingly attached to the cutter support beam with a corresponding first pivot pin and second pivot pin,
the link arms are pivotingly attached to a frame part with a corresponding third pivot pin and fourth pivot pin,
the first pivot pin and second pivot pin are fixed relative each other, and
the third pivot pin and fourth pivot pin have an adjustable relation relative each other such that the cutter support beam is rotated around the longitudinal beam extension when the relation between the third pivot pin and the fourth pivot pin is adjusted
wherein, at each of the respective supporting positions
one of the third pivot pin and the fourth pivot pin constitutes an adjustment pin that runs along a longitudinal pin extension via an elongated opening in the frame part and is received in a holding casing that comprises an adjustment aperture that comprises inner adjustment threads and runs perpendicular to the longitudinal pin extension, and
the adjustment aperture is adapted to receive an adjustment bolt with outer adjustment threads that engage the inner adjustment threads,
wherein turning of the adjustment bolt will move the holding casing such that the adjustment pin is moved within the elongated opening, and
wherein the cutting deck is covered by a first body part which in turn comprises a first removable cover plate and a second removable cover plate, wherein, when a cover plate is removed, access is provided to a corresponding locking screw and adjustment bolt, enabling the relation between the third pivot pin and the fourth pivot pin to be adjusted.