公开(公告)号：US20220219308A1

公开(公告)日：2022-07-14

申请号：US17605916

申请日：2020-11-25

Applicant: HUSQVARNA AB

Inventor： Torbjörn Almqvist ,  Paul Johansson ,  Fredrik Karlsson

IPC: B25F5/00 ,  B25F5/02 ,  B28D1/04 ,  H01M50/244

Abstract: A hand-held electrically powered cut-off tool (100, 200, 800, 1000, 1900, 2300) comprising a fan (145) arranged to be driven by an electric motor (140) to generate a flow of cooling air (160) and a battery compartment (150) comprising an electrical storage device (220, 1800), such as a battery, arranged to power the electric motor (140), wherein a cooling air conduit is arranged to guide the flow of cooling air (160) towards an outlet aperture (1750) formed in a wall of the battery compartment (150), where the outlet aperture (1750) faces a corresponding inlet aperture (1870) formed in an enclosure of the electrical storage device (220, 1800) for receiving cooling air and thereby generating an air pressure above atmospheric pressure in the electrical storage device (220, 1800), wherein a first slot section (Ss1) is formed by a distance between the outlet aperture (1750) and the inlet aperture (1870) such that a first portion (2415) of the flow of cooling air (160) air leaks out to an exterior of the cut-off tool via the first slot section (Ss1).

公开(公告)号：US20220193879A1

公开(公告)日：2022-06-23

申请号：US17603350

申请日：2020-10-01

Applicant: HUSQVARNA AB

Inventor： Torbjörn Almqvist ,  Paul Johansson ,  Hanna Olsson ,  Robert Lerbro ,  Pär Carlsson

IPC: B25F5/00 ,  B25F5/02

Abstract: A hand-held work tool (100) comprising a first part (110) and a second part (120) arranged vibrationally isolated from each other, the first part (110) comprising an interface for holding a circular cutting tool (130) and an electric motor (140) arranged to drive the circular cutting tool, wherein the electric motor (140) is arranged to drive a fan (145) configured to generate a flow of cooling air for cooling the electric motor (140), the second part (120) comprising a battery compartment (150) for holding an electrical storage device arranged to power the electric motor (140), wherein a cooling air conduit is arranged to guide a portion of the flow of cooling air (160) from the first part (110) and into the second part (120) for cooling the electrical storage device.

公开(公告)号：US20220314422A1

公开(公告)日：2022-10-06

申请号：US17605927

申请日：2020-11-25

Applicant: HUSQVARNA AB

Inventor： Fredrik Karlsson ,  Torbjörn Almqvist ,  Niklas Sundberg ,  Paul Johansson

IPC: B25F5/00 ,  B28D1/04 ,  H01M50/247 ,  H01M10/613 ,  H01M10/6235 ,  H01M10/6566 ,  H01M10/6556

Abstract: A hand-held electrically powered cut-off tool (100, 200, 800, 1000, 1900) comprising a first part (110) and a second part (120) arranged vibrationally isolated from each other, the first part (110) comprising an arm (116) arranged to support a cutting disc (130) and an electric motor (140) arranged to drive the cutting disc, the second part (120) comprising front (190) and rear (195) handles for operating the cut-off tool, and a battery compartment (150) for holding an electrical storage device (220, 1800) such as a battery arranged to power the electric motor (140), wherein one or more damping members (170, 1910) are arranged in-between the first part (110) and the second part (120), where at least one damping member (170, 1910) is formed in a resilient material associated with a damping coefficient.

公开(公告)号：US12194608B2

公开(公告)日：2025-01-14

申请号：US17603350

申请日：2020-10-01

Applicant: HUSQVARNA AB

Inventor： Torbjörn Almqvist ,  Paul Johansson ,  Hanna Olsson ,  Robert Lerbro ,  Pär Carlsson

IPC: B25F5/00 ,  B25F5/02

Abstract: A hand-held work tool (100) comprising a first part (110) and a second part (120) arranged vibrationally isolated from each other, the first part (110) comprising an interface for holding a circular cutting tool (130) and an electric motor (140) arranged to drive the circular cutting tool, wherein the electric motor (140) is arranged to drive a fan (145) configured to generate a flow of cooling air for cooling the electric motor (140), the second part (120) comprising a battery compartment (150) for holding an electrical storage device arranged to power the electric motor (140), wherein a cooling air conduit is arranged to guide a portion of the flow of cooling air (160) from the first part (110) and into the second part (120) for cooling the electrical storage device.

公开(公告)号：US20220212330A1

公开(公告)日：2022-07-07

申请号：US17605463

申请日：2020-11-25

Applicant: HUSQVARNA AB

Inventor： Torbjörn Almqvist ,  Paul Johansson

IPC: B25F5/00 ,  B28D1/04 ,  H01M10/613 ,  H01M10/6563 ,  H01M10/6235

Abstract: A handheld work tool comprising a cutting tool (130), an electric motor (140) having a rotational axis and being arranged to drive the cutting tool (130), a battery compartment (150) for a battery (220) arranged to power the electric motor (140), a support arm (240) and a belt guard (115). The support arm (240) is arranged to support the circular cutting tool (130) on a first end (241) of the support arm, and to support the electric motor (140) at a second end of the support arm (242), opposite to the first end (241). The belt guard (115) and at least a part of the support arm (240) are configured to enclose an interior space (340), where the hand-held work tool (100, 200, 800, 1000) comprises a fan (145), configured to generate a flow of cooling air. A portion of the flow of cooling air is arranged to be guided via at least one opening (310) into the interior space (340), thereby increasing an air pressure in the interior space (340) above an ambient air pressure level.

公开(公告)号：US20220152872A1

公开(公告)日：2022-05-19

申请号：US17605896

申请日：2020-11-25

Applicant: HUSQVARNA AB

Inventor： Torbjörn Almqvist ,  Paul Johansson ,  Hanna Olsson

IPC: B28D1/04 ,  B23D45/16 ,  B23D57/02 ,  B25F5/00 ,  B25F5/02 ,  B26B25/00 ,  B27B17/02 ,  F16F15/08 ,  F16F7/10 ,  H01M50/247 ,  H01M50/262

Abstract: A hand-held electrically powered cut-off tool (100, 200, 800, 1000, 1900, 2500) comprising a first part (110) and a second part (120) arranged vibrationally isolated from each other, the first part (110) comprising an interface (2510) for holding a cutting tool (130) and an electric motor (140) arranged to drive the cutting tool, wherein the first part is associated with a first mass (M1), the second part (120) comprising a battery compartment (150) for holding an electrical storage device (220) arranged to power the electric motor (140) as well as front (190) and rear (195) handles for operating the cut-off tool, wherein the second part is associated with a second mass (M2), wherein the electrical storage device (220) is associated with a third mass (M3), and wherein the cutting tool is associated with a fourth mass (M4), wherein a ratio of the second mass (M2) to the sum of the first and second masses (M1+M2) is at least 0.3, and preferably more than 0.35; wherein a ratio of a sum of the second and the third mass (M2+M3) to the sum of the first and fourth masses (M1+M4) is at least 0.6, and preferably more than 0.8 and even more preferably more than 1.0; wherein a ratio of a sum of the second and the third mass (M2+M3) to the sum of the weight of the entire device including electrical energy storage and cutting disc, is at least 0.45, and preferably more than 0.5.