US-12617068-B2 - Method for operating a hand-guided working apparatus, and hand-guided working apparatus

US12617068B2US 12617068 B2US12617068 B2US 12617068B2US-12617068-B2

Abstract

A method operates a hand-guided working apparatus having a movable working tool installation, a shaft, and a drive motor system. The shaft is designed for moving the working tool installation. The drive motor system is designed for driving the shaft. The working tool installation, the shaft, and the drive motor system at least in part form part of a system capable of rotational oscillation. A controllable oscillation damping installation is designed for damping and/or reducing an excitation of at least one oscillation of the system capable of rotational oscillation and/or excitable by the system capable of rotational oscillation. The method includes: operating the drive motor system to drive the shaft for moving the working tool installation; and controlling the oscillation damping installation during operation such that the oscillation is at least damped and/or an excitation of the oscillation is reduced.

Inventors

Thomas Pritzen

Assignees

ANDREAS STIHL AG & CO. KG

Dates

Publication Date: 20260505
Application Date: 20210720
Priority Date: 20200721

Claims (12)

1 . A method for operating a hand-guided working apparatus, wherein the working apparatus comprises: a movable working tool installation; a shaft, wherein the shaft is configured for moving the working tool installation; at least one handle disposed in a region of the shaft so as to be between ends of the shaft; a drive motor system having an electric drive motor configured for driving the shaft; wherein the working tool installation, the shaft and the drive motor system at least in part form at least one part of a system capable of rotational oscillation; and a controllable oscillation damping installation, wherein the oscillation damping installation at least dampens and/or reduces an excitation of at least one oscillation of the system capable of rotational oscillation and/or excitable by the system capable of rotational oscillation; wherein the oscillation damping installation has a notch filter, wherein the drive motor system having the electric drive motor and the oscillation damping installation are completely electronically integrated; and wherein the method comprises the steps of: a) operating the electric drive motor to drive the shaft for moving the working tool installation; and b) controlling the oscillation damping installation during operation in such a manner that the oscillation is at least damped and/or an excitation of the oscillation is reduced; and further wherein step a) and/or step b) comprises: operating and/or controlling the electric drive motor in a manner to at least dampen the oscillation and/or to reduce an excitation of the oscillation by operating and/or controlling the electric drive motor while using the notch filter by filtering a frequency component, that excites at least the oscillation, from a variable signal in the form of a nominal torque signal, a nominal current signal and/or a feedback variable signal, of an electronic motor control unit of the drive motor system; and wherein the method further comprises: detecting at least the actual oscillation by way of the drive motor system, by detecting a temporal actual operating data profile, of the drive motor system.
2 . The method according to claim 1 , wherein the working apparatus is a cutting apparatus; and/or the working tool installation is a cutting tool installation.
3 . The method according to claim 2 , wherein the cutting apparatus is a brushcutter or an edge trimmer; and/or wherein the cutting tool installation comprises a cutting line, a cutting knife or a cutting blade.
4 . The method according to claim 1 , wherein the working apparatus has a gearbox, wherein the gearbox is configured for moving the working tool installation and wherein the shaft is configured for moving the gearbox, or wherein the gearbox is configured for driving the shaft and wherein the drive motor system is configured for driving the gearbox; and wherein the gearbox at least in part forms a part of the system capable of rotational oscillation.
5 . The method according to claim 1 , wherein the working apparatus has a shank; wherein the shaft is disposed in the shank; and wherein the working tool installation and the drive motor system are mechanically connected to one another by way of at least the shank, including the system capable of rotational oscillation being mechanically closed by way of at least the shank.
6 . The method according to claim 5 , wherein the at least one handle is fastened to the shank.
7 . The method according to claim 1 , wherein the method further comprises the step of: detecting at least one actual oscillation of the system capable of rotational oscillation and/or excited by the system capable of rotational oscillation during step a) and/or temporally before step b) and/or during step b); and wherein step b) comprises: controlling based at least on the detected actual oscillation.
8 . The method according to claim 7 , wherein the method further comprises: detecting at least the actual oscillation by way of the oscillation damping installation, by detecting a temporal actual operating data profile, of the drive motor system.
9 . The method according to claim 8 , wherein the detected temporal actual operating data profile is a temporal actual rotating speed and/or current and/or voltage and/or power profile, of the drive motor system.
10 . The method according to claim 1 , wherein the shaft has a length of at least 0.5 m, and/or of at most 4.5 m; and/or wherein the oscillation has a frequency of at least 2 Hz, and/or of at most 100 Hz.
11 . The method according to claim 1 , wherein the electronic motor control unit of the drive motor system is an electronic closed-loop motor control unit.
12 . A hand-guided working apparatus, comprising: a movable working tool installation; a shaft, wherein the shaft is configured for moving the working tool installation; at least one handle disposed in a region of the shaft so as to be between ends of the shaft; a drive motor system having an electric drive motor configured for driving the shaft; wherein the working tool installation, the shaft and the drive motor system at least in part form at least one part of a system capable of rotational oscillation; a controllable oscillation damping installation, wherein the oscillation damping installation at least dampens and/or reduces an excitation of at least one oscillation of the system capable of rotational oscillation and/or excitable by the system capable of rotational oscillation; wherein the oscillation damping installation has a notch filter; wherein the drive motor system having the electric drive motor and the oscillation damping installation are completely electronically integrated; and an operating and controlling installation, wherein the operating and controlling installation is configured to: operate the electric drive motor system to drive the shaft for moving the working tool installation; operate and/or control the electric drive motor of the drive motor system in a manner to at least dampen the oscillation and/or to reduce an excitation of the oscillation is reduced, wherein the operating and controlling installation operates and/or controls the electric drive motor while using the notch filter by filtering a frequency component, that excites at least the oscillation, from a variable signal in the form of a nominal torque signal, a nominal current signal and/or a feedback variable signal, of an electronic motor control unit of the drive motor system, and wherein the operating and controlling installation detects at least the actual oscillation by way of the drive motor system, by detecting a temporal actual operating data profile, of the drive motor system.

Description

CROSS REFERENCE TO RELATED APPLICATION This application claims priority under 35 U.S.C. § 119 from European Patent Application No. 20187023.5, filed Jul. 21, 2020, the entire disclosure of which is herein expressly incorporated by reference. BACKGROUND AND SUMMARY OF THE INVENTION The invention relates to a method for operating a hand-guided working apparatus and to a hand-guided working apparatus. The invention is based on providing a method for operating a hand-guided working apparatus, and a hand-guided working apparatus, said method and said working apparatus each having improved properties, in particular so as to enable a high level of comfort for a user of the working apparatus. The invention achieves this object by providing a method and a hand-guided working apparatus having the features of the independent claims. Advantageous refinements and/or design embodiments of the invention are described in the dependent claims. The, in particular automatic, method according to the invention is designed or configured or provided for, in particular automatically, operating a hand-guided working apparatus. The working apparatus comprises or has a movable, working tool installation which is in particular movable for turning or rotation, a shaft which is in particular movable for turning or rotation, a drive motor system, and a, in particular electrically, controllable, in particular electric, in particular electronic, aoscillation damping installation. The shaft is designed or configured for moving, in particular moving by turning or rotation, in particular at least one part of the working tool installation. The drive motor system is designed or configured for driving, in particular moving by turning or rotation, the shaft. The working tool installation, the shaft and the drive motor system form, in particular each, at least in part at least one part of a system at least capable of rotational or torsional oscillation. The oscillation damping installation is designed or configured at least for, in particular indirectly and/or directly, damping and/or, in particular indeed, for, in particular indirectly and/or directly, reducing, in particular avoiding, an excitation, in particular a non-excitation, of at least a oscillation, in particular a rotational or torsional oscillation, in particular an amplitude of the oscillation, of the system capable of rotational oscillation, and/or excitable, or capable of being excited, in particular indirectly and/or indirectly, by the system capable of rotational oscillation. The method comprises or has the steps: a) operating, in particular automatically operating, the drive motor system for driving the shaft for moving the working tool installation, in particular by the user; b) controlling, in particular automatically controlling, the oscillation damping installation during operation or during step a) or simultaneously with operating or with step a), respectively, in such a manner that the oscillation is at least damped and/or, in particular indeed, an excitation of the oscillation is reduced, in particular avoided, in particular not excited. This, in particular the damping and/or the reduction, in particular the avoidance, of an excitation of the oscillation enables low or indeed no stress on the user, in particular on a wrist of the user. This thus enables a high level of comfort for the user. The hand-guided working apparatus can in particular be a hand-held working apparatus. Additionally or alternatively, hand-guided, in particular hand-held, working apparatus may mean that the working apparatus has a mass of at most 50 kilograms (kg), in particular of at most 20 kg, in particular of at most 10 kg, in particular of at most 5 kg, and/or of at least 1 kg, in particular of at least 2 kg. Furthermore additionally or alternatively, the working apparatus can be a garden working apparatus, a forestry working apparatus, and/or a construction working apparatus. The working tool installation can be a garden working tool installation, a forestry working tool installation, and/or a construction working tool installation. Additionally or alternatively, the working tool installation can be movable in a linear or translatory manner, respectively. The shaft and the working tool installation can be mechanically connected to one another for movement. Additionally or alternatively, the shaft can be a rigid shaft or a flexible shaft. The drive motor system and the shaft can be mechanically connected to one another for movement. The working tool installation can be disposed in the region of an, in particular lower and/or first, end, in particular at the end, of the shaft, and/or the drive motor system can be disposed in the region of an, in particular other and/or upper and/or second, in particular opposite, end, in particular at the end, of the shaft. The working tool installation, in particular at least in part as at least one part of a first mass, the shaft, in particular at least in part a