Patent · US Active

Procedure for detecting a transmission backlash in a power tool, in particular a hand-held power tool, and power tool

US11901852B2 · kind B2 · utility

0Cited by

1References

16Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Hardy Schmid · Stuttgart, DE
Axel Kuhnle · Freiberg, DE
Hagen Philipp Keinath · Stuttgart, DE
Matthias Tauber · Bad Boll, DE
Sebastian Maier · Ergolding, DE

Key dates

Filing date	Sep 29, 2021
Grant date	Feb 13, 2024
Priority date	—
Expiry date	Apr 14, 2042

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2250/221
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A method for detecting a transmission backlash in a hand-held power tool, the hand-held power tool comprising a drive motor that has a drive shaft, a tool spindle, and a transmission that, in respect of drive, connects the drive shaft to the tool spindle, includes actuating, in a first actuation, the drive motor at least until the value of a first variable, representing a drag torque, is at least approximately constant. The method includes, during the first actuation, determining a value of a second variable which is associated with the rotation of the drive shaft of the drive motor during the first actuation, and determining a value of a third variable, representing a transmission backlash, based upon a change in the second variable during the first actuation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.