公开(公告)号：WO2021215980A1

公开(公告)日：2021-10-28

申请号：PCT/SE2021/050330

申请日：2021-04-12

Applicant: HUSQVARNA AB

Inventor： EDERFORS, Lars

IPC: B60B15/12 ,  A01D34/00

Abstract: A lawnmower (1) is disclosed comprising at least one drive wheel (3) and a propulsion motor (4) configured to rotate the drive wheel (3). The drive wheel (3) comprises a first wheel member (5) connected to the propulsion motor (4), a second wheel member (7) comprising a ground engaging surface (7') configured to abut against a ground surface (22) during operation of the lawnmower (1), and a number of grip enhancing members (8) movably arranged relative to the ground engaging surface (7') between a retracted and an extracted position. The drive wheel (3) further comprises a mechanism (9) configured to move the grip enhancing members (8) between the retracted and the extracted position based on a torque between the first and second wheel members (5, 7). The present disclosure further relates to a drive wheel (3) for a lawnmower (1).

公开(公告)号：WO2021228633A1

公开(公告)日：2021-11-18

申请号：PCT/EP2021/061771

申请日：2021-05-05

Applicant: HUSQVARNA AB

Inventor： EDERFORS, Lars ,  BJÖRN, Jonathan ,  OLOFSSON, Willy

IPC: A01D34/86 ,  A01D34/00 ,  A01D75/28 ,  G05G5/06 ,  B60G3/00 ,  B60B33/00 ,  B60B33/02 ,  A01D101/00

Abstract: A self-propelled robotic Iawnmower (1) is disclosed comprising a lawnmower body (3) and at least one caster wheel (5) pivotally attached to the lawnmower body (3) about a swivel joint (7). The caster wheel (5) is configured to support the lawnmower body (3) by abutting against a ground surface (22) during operation of the lawnmower (1). The lawnmower (1) further comprises a locking assembly (9) configured to at least partially lock the caster wheel (5) from pivoting about the swivel joint (7).

公开(公告)号：WO2020169318A1

公开(公告)日：2020-08-27

申请号：PCT/EP2020/052310

申请日：2020-01-30

Applicant: HUSQVARNA AB

Inventor： LILJEDAHL, Dan ,  EDERFORS, Lars ,  BERGENHOLM, Magnus ,  WIKESTAD, Daniel

IPC: A01D34/00 ,  G01D1/00

Abstract: A robotic work tool (100) comprising a chassis (110) and a body (120). The robotic work tool (100) further comprises at least one input unit (170, 180) for receiving input data relating to an operation of the robotic work tool (100), and at least one collision sensor arrangement (140) for detecting a direction of a movement of the chassis (110) with respect to the body (120). The movement is indicative of a collision. The robotic work tool (100) further comprises at least one controller (130) for controlling operation of the robotic work tool (100). The at least one controller (130) is configured to receive, from the at least one input unit (170, 180), said input data relating to the operation of the robotic work tool (100). The at least one controller (130) is further configured to adapt a collision threshold based on said input data relating to the operation of the robotic work tool (100). The collision threshold is related to said movement of the chassis (110) with respect to the body (120) detected by the at least one collision sensor arrangement (140).

公开(公告)号：WO2019160470A1

公开(公告)日：2019-08-22

申请号：PCT/SE2019/050103

申请日：2019-02-07

Applicant: HUSQVARNA AB

Inventor： EDERFORS, Lars

IPC: A01D34/00 ,  A01D67/00 ,  B60L15/20 ,  A01D75/00

Abstract: An outdoor robotic tool (10) comprising a first part (20) and a second part (30), wherein the first part (20) supports the second part (30) through a suspension arrangement. The suspension arrangement comprises a first component (40), which comprises at least one magnetic member; and a second component (50), which comprises at least one magnetic member. The first component (40) is attached to the first part (20), wherein the second component (50) is attached to the second part (30), wherein at least one of the magnetic members of suspension arrangement is a permanent magnet (42, 52); and wherein a magnetic member of the first component (40) is positioned so as to magnetically interact with a magnetic member of the second component (50) when in use. A magnetic field sensing unit (60) may be present that comprises a control unit (61) and a magnetic field sensor. A method for detecting the alignment of the first part (20) relative to the second part (30), wherein the method comprises detecting the magnetic field using the magnetic field sensing unit (60), is also disclosed.