Self-aligning tool guide

Patent metadata

Field	Value
Publication number	US-11673252-B2
Application number	US-201816766534-A
Country	US
Kind code	B2
Filing date	Oct 30, 2018
Priority date	Nov 23, 2017
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

A self-aligning tool guide has a holder for securing a portable power tool for working on a ceiling, a lifting mechanism, and a self-balancing chassis. The holder is mounted on the lifting mechanism. The lifting mechanism has a propulsion system for raising the holder parallel to a lifting axis. The self-balancing chassis has two wheels on a wheel axis and a drive coupled to the two wheels. A sensor serves for detecting a contact pressure of the holder, the contact pressure acting in the direction of gravitational force. The control station activates the propulsion system depending on the detected contact pressure.

First claim

The invention claimed is:

1. A self-aligning tool guide, comprising:
a holder for securing a portable power tool for working on a ceiling;
a lifting mechanism on which the holder is mounted, wherein the lifting mechanism has a propulsion system for raising the holder parallel to a lifting axis;
a self-balancing chassis which has two wheels on a wheel axis and a drive coupled to the two wheels;
wherein the lifting mechanism is mounted rigidly on the self-balancing chassis;
a sensor for detecting a contact pressure of the holder, wherein the contact pressure acts in a direction of a gravitational force; and
a control station which adapts a propulsion speed of the propulsion system depending on the detected contact pressure.

2. The self-aligning tool guide as claimed in claim 1 further comprising a center of gravity sensor for detecting a lateral deflection of a center of gravity of the lifting mechanism in relation to the wheel axis and a steering system which is configured to activate the drive to output a torque that counteracts the lateral deflection.

3. A control method for the self-aligning tool guide as claimed in claim 1 , comprising the steps of:
aligning the lifting mechanism by balancing the self-balancing chassis, wherein the self-balancing chassis is balanced by driving the two wheels;
raising the lifting mechanism by the propulsion system;
detecting a contact pressure of the holder in the direction of the gravitational force with the sensor; and
adapting a propulsion speed of the propulsion system depending on the detected contact pressure.

4. The control method as claimed in claim 3 , wherein, if the detected contact pressure exceeds a threshold value, the balancing is suspended and a brake of the self-balancing chassis is activated.

5. The control method as claimed in claim 3 further comprising the step of activating a portable power tool which is inserted into the holder if the detected contact pressure exceeds a threshold value.

Assignees

• Hilti Ag

Inventors

• Schmidt Peer
• Bralla Dario
• Khandozhko Serhey

Classifications

• B25H1/0028 Primary

  Tool balancers · CPC title

• B60L2200/16

  Single-axle vehicles · CPC title

• B60L50/50

  using propulsion power supplied by batteries or fuel cells · CPC title

• B25D17/32 Primary

  Trolleys · CPC title

• B25H1/0035

  Extensible supports, e.g. telescopic · CPC title