US 12,377,472 B2
Tool holding arrangement, thread insert, rotatable shaft and drill unit
David Grennhag, Källered (SE)
Assigned to HUSQVARNA AB, Huskvarna (SE)
Appl. No. 17/433,726
Filed by HUSQVARNA AB, Huskvarna (SE)
PCT Filed Feb. 3, 2020, PCT No. PCT/SE2020/050097
§ 371(c)(1), (2) Date Aug. 25, 2021,
PCT Pub. No. WO2020/176023, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 1950247-5 (SE), filed on Feb. 26, 2019.
Prior Publication US 2022/0134446 A1, May 5, 2022
Int. Cl. B23B 31/11 (2006.01); B23B 45/00 (2006.01); B23B 51/04 (2006.01)
CPC B23B 31/11 (2013.01) [B23B 45/003 (2013.01); B23B 51/0473 (2013.01); B23B 2231/04 (2013.01); B23B 2260/056 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A tool holding arrangement comprising a rotatable shaft which is at least connectable to a drill unit and comprises a first shaft thread wherein the tool holding arrangement comprises a thread insert that comprises a first insert thread, adapted to engage the first shaft thread so as to form a first thread arrangement, and a second insert thread adapted to engage a tool thread of a tool holding device that is arranged to be screwed onto the second insert thread so as to form a second thread arrangement, the first thread arrangement having a higher pitch than the second thread arrangement, wherein the tool holding arrangement comprises an outer sleeve that is adapted to retain the thread insert in movable engagement with the rotatable shaft by being fastened to an outer surface of the rotatable shaft.