US 11,745,327 B2
Self-aligning tool guide
Peer Schmidt, Lindau (DE); Dario Bralla, Buchs (CH); and Serhey Khandozhko, Buchs SG (CH)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 16/766,609
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Oct. 31, 2018, PCT No. PCT/EP2018/079789
§ 371(c)(1), (2) Date May 22, 2020,
PCT Pub. No. WO2019/101481, PCT Pub. Date May 31, 2019.
Claims priority of application No. 17203218 (EP), filed on Nov. 23, 2017.
Prior Publication US 2021/0001472 A1, Jan. 7, 2021
Int. Cl. B25H 1/00 (2006.01); B60L 50/60 (2019.01); B25D 17/32 (2006.01); B60L 15/20 (2006.01); B60L 7/00 (2006.01)
CPC B25H 1/0028 (2013.01) [B25D 17/32 (2013.01); B25H 1/0035 (2013.01); B60L 7/003 (2013.01); B60L 15/20 (2013.01); B60L 50/66 (2019.02); B60L 2200/16 (2013.01); B60L 2200/40 (2013.01); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01); B60L 2260/34 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A self-aligning tool guide with a hand-held machine tool, comprising:
a mounting, wherein the hand-held machine tool is fixed in the mounting, wherein the hand-held machine tool is a power tool, and wherein a ceiling is machinable by the power tool;
a lifting mechanism on which the mounting is mounted and wherein the lifting mechanism has a propulsion unit for lifting the mounting parallel to a lifting axis;
a self-balancing chassis which has two wheels on a wheel axle, a drive coupled with the two wheels, and a steering system, wherein the lifting mechanism is mounted on the self-balancing chassis;
a center of gravity sensor for detecting a lateral deflection of a center of gravity of the lifting mechanism relative to the wheel axle, wherein the steering system is configured to control the drive to output a torque that counteracts the lateral deflection;
a contact sensor, wherein the contact sensor detects a contact force of the mounting which acts in a direction of gravity; and
a control station, wherein the control station controls the propulsion unit depending on a detected contact pressure.