Husqvarna Ab

Jonathan Björn

Patrik Jägenstedt

Mats R Svensson

Magnus Öhrlund

Fredrik Kallström

Jonas Holgersson

Martin Elonsson

Olle Markusson

Stefan Strandberg

Anders Sjögren

Anders Hjalmarsson

Peter Hallin

Gunnar Andersson

Patrick Pettersson

Pär-Ola Svensson

A lawn mower may include a cutter propulsion unit, a transmission axle that may have a longitudinal extension and may be adapted to be rotated by the cutter propulsion unit. The lawn mower may further include a cutting disc that may have a radial extension (R) that runs between a center and an outer edge, where the cutting disc may include one or more cutting edges that may be adapted to cut grass when the cutting disc may be brought into a rotational motion by means of the transmission axle. The cutting disc may further include a connection portion which may be adapted to receive a coupling member, which may be included in the transmission axle, in at least two different mounting positions that may be adapted to position the connection portion in mutually separated positions along the longitudinal extension (L, L′).

Means for adjusting cutting height of a powered lawn mower

A robotic work tool system () comprising a robotic work tool (), said robotic work tool () comprising a chassis (B) and a body (A) and at least one support pillar () arranged on one of the chassis (B) and the body (A) and a corresponding support surface () arranged on the other of the chassis (B) and the body (A), wherein the support pillar substantially bridges a distance between the chassis (B) and the body (A) thereby impairing any roll or tilt of the body (A) relative the chassis (B).

Robotic work tool

A robotic work tool system may include a robotic work tool. The robotic work tool may include two front wheels and a chassis. The robotic work tool is characterized in that the two front wheels are arranged on a beam axle that is pivotably arranged to the chassis.

Robotic working tool

A robotic work tool system () comprising a robotic work tool () comprising a lift/collision detection sensor (), said lift/collision detection sensor () comprising a polarity element () and at least a first sensing element (') and a second sensing element (&#x2033;), wherein the polarity element () has a first and a second polarity and wherein the first and second sensing elements are configured to each sense a polarity of the first polarity element (). The robotic work tool () is configured to detect a polarity change in the first sensing element (&#x2032;) and in the second sensing element (&#x2033;) and in response thereto determine that a lift has been detected, or detect a polarity change in the first sensing element (&#x2032;) but not in the second sensing element (&#x2033;) and in response thereto determine that a collision has been detected.

Lift/collison detection

A robotic work tool system () comprising a robotic work tool () comprising a collision detection sensor (), said collision detection sensor () comprising a first sensor element () and a plurality of second sensor elements (), wherein said first sensor element () is movably arranged with respect to said plurality of second sensor elements (), wherein said robotic work tool () is configured to detect that said first sensor element () is proximate a peripheral second sensor element () and in response thereto determine that a collision has been detected, and detect that said first sensor element () is not proximate any peripheral second sensor element () and in response thereto determine that a lift has been detected.

Obstacle detection for a robotic working tool

A charging coupling for connecting a robotic garden tool with a charging device may facilitate the charging of a battery of the robotic garden tool. The charging coupling may include a first charging contact and a second charging contact. The first charging contact may be a charging plate or a charging rod. The second charging contact may be provided with a row of resilient contact bars. The arrangement of the first charging contact and the second charging contact may be configured such that the resilient contact bars are pressed against the charging plate to provide multiple contact points.

Effective charging by multiple contact points

A robotic lawnmoweris provided, having a deactivated state, a stand by state and an activated state. A removable disabling deviceis arranged to be positioned in a first, a second, and a third position in a retainerof the robotic lawnmower. The first position constitutes an off position in which the robotic lawnmoweris in a deactivated state. The second position constitutes a stand by position in which the robotic lawnmoweris in a stand by state. The third position constitutes an on position in which the robotic lawnmoweris in an activated state. The present invention also relates to a disabling devicearranged to be positioned in a retainerof a robotic lawnmoweraccording to the invention.

Robotic lawnmower

A lift detection arrangement () in a robotic lawnmower for detecting a lift of a body () relative a chassis () of the robotic lawnmower is provided. The lift detection arrangement () comprises a connection between the chassis () and the body (). The connection comprises a joystick element () 5 arranged to allow a displacement of the body () relative the chassis () in a collision plane during a collision, and a lift element () arranged to provide a flexibility between the chassis () and the body () in a lift direction during the lift. The lift detection arrangement () further comprises a lift sensor configured to detect a displacement over a predetermined threshold of the lift element () 10 during the lift by detecting a change in spacing between two sensor parts (). One of the two sensor parts () is arranged on the lift element and the two sensor parts () are arranged to be relatively displaceable only in the lift direction.

Growing community of inventors

Jönköping, Sweden

Jonathan Björn