A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Handheld work apparatus
A handheld work apparatus has a blower wheel. The blower wheel is held via a nut on the shaft in a manner locked against rotation by frictional force. A thread moment of friction is transmittable between the nut and the shaft via a thread section. A first moment of friction is transmittable between the nut and the blower wheel via a first friction contact surface. The first friction contact surface is configured such that, at a minimum tightening torque of the nut, the first moment of friction is greater than the thread moment of friction. As a result, during the operation of the work apparatus when there is a relative movement between the blower wheel and the shaft, the blower wheel moves the nut along therewith. The nut retensions the blower wheel against the shaft. The second friction contact surface runs conically with respect to the rotational axis.
Handheld work apparatus
A handheld work apparatus has a blower wheel. The blower wheel is held via a nut on the shaft in a manner locked against rotation by frictional force. A thread moment of friction is transmittable between the nut and the shaft via a thread section. A first moment of friction is transmittable between the nut and the blower wheel via a first friction contact surface. The first friction contact surface is configured such that, at a minimum tightening torque of the nut, the first moment of friction is greater than the thread moment of friction. As a result, during the operation of the work apparatus when there is a relative movement between the blower wheel and the shaft, the blower wheel moves the nut along therewith. The nut retensions the blower wheel against the shaft. The second friction contact surface runs conically with respect to the rotational axis.
Handheld work apparatus
DENSBORN GERD (author) / SCHLIEMANN HARALD (author) / CORNELSEN RALF (author) / WEISSERT WOLFGANG (author)
2021-03-09
Patent
Electronic Resource
English
IPC:
F04D
Strömungsarbeitsmaschinen
,
NON-POSITIVE-DISPLACEMENT PUMPS
/
A01G
Gartenbau
,
HORTICULTURE
/
B08B
Reinigen allgemein
,
CLEANING IN GENERAL
/
B25F
Kombinierte oder Mehrzweckwerkzeuge, soweit nicht anderweitig vorgesehen
,
COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR
/
E01H
STREET CLEANING
,
Reinigen von Straßen
/
F01P
Kühlung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein
,
COOLING OF MACHINES OR ENGINES IN GENERAL
/
F02B
INTERNAL-COMBUSTION PISTON ENGINES
,
Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung
/
F16B
DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES
,
Vorrichtungen zum Befestigen oder Sichern von Konstruktionselementen oder Maschinenteilen, z.B. Nägel, Bolzen, Schrauben, Sprengringe, Klemmen, Klammern oder Keile