Self-aligning tool guide

Patent metadata

Field	Value
Publication number	US-11745327-B2
Application number	US-201816766609-A
Country	US
Kind code	B2
Filing date	Oct 31, 2018
Priority date	Nov 23, 2017
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A tool guide has a mounting, a lifting mechanism, and a chassis. The mounting is for fixing a hand-held machine tool. The mounting is mounted on the lifting mechanism. The lifting mechanism has a propulsion unit for vertically lifting the mounting. The chassis has two wheels on a wheel axle, a drive coupled with the wheels, and a steering system. The lifting mechanism is rigidly mounted on the chassis. A center of gravity sensor is arranged to detect a lateral deflection of the center of gravity of the lifting mechanism relative to the wheel axle. The steering system is configured to control the drive to deliver a torque counteracting the lateral deflection.

First claim

The invention claimed is:

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.

2. The self-aligning tool guide according to claim 1 , wherein the self-aligning tool guide has exactly two wheels.

3. The self-aligning tool guide according to claim 1 , wherein the lifting mechanism is pivotable about the wheel axle.

4. The self-aligning tool guide according to claim 1 , wherein the steering system has a stationary mode in which the steering system is configured to balance the center of gravity via the drive.

5. The self-aligning tool guide according to claim 1 , wherein the steering system is configured to vertically align the lifting axis via the drive.

6. The self-aligning tool guide according to claim 1 , wherein the lifting mechanism is coupled with a stator of the drive.

7. The self-aligning tool guide according to claim 1 , wherein the mounting is configured to arrange a working axis of the hand-held machine tool that is fixed in the mounting perpendicular to the wheel axle.

8. The self-aligning tool guide according to claim 1 , wherein the mounting is displaceable transversely to the lifting axis.

9. The self-aligning tool guide according to claim 1 , wherein the lifting mechanism is limited to a single-axis, translational movement along the lifting axis.

10. A control method for a self-aligning tool guide with a hand-held machine tool, wherein the self-aligning tool guide comprises:
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;
and the control method comprising the steps of:
detecting the lateral deflection of the center of gravity of the lifting mechanism relative to the wheel axle of the self-aligning tool guide;
actuating the drive such that the drive outputs a torque that counteracts the lateral deflection;
detecting a contact force of the mounting which acts in the direction of gravity by the contact sensor; and
controling the propulsion unit by the control station depending on the detected contact pressure.

Assignees

• Hilti Ag

Inventors

• Schmidt Peer
• Bralla Dario
• Khandozhko Serhey

Classifications

• G05D1/0891

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• B25H1/0028 Primary

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• B25D17/32 Primary

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• B25H1/0035

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• B60L7/003

  Dynamic electric braking by short circuiting the motor · CPC title