Work apparatus

US6314649A · kind A · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventor

• Peter Linsbauer · Winnenden, DE

Key dates

• Filing date: Mar 10, 2000
• Grant date: Nov 13, 2001
• Expiry date: Mar 10, 2020

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01D34/90
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to the assembly of a shaft bearing (16) in the end section (6) of a guide tube (5) of a brushcutter (1). The guide tube (5) accommodates a drive shaft. The bearing (16) is axially inserted into the end section (6) and is held so that it cannot separate therefrom. The outer diameter (D.sub.M) of the outer surface (18) of the bearing (16) is configured smaller than the inner diameter (D.sub.I) of the end section (6) in order to facilitate assembly and to ensure a force-tight inseparable seating of the bearing 16 in the end section. Several axial ribs (19, 20, 21) are distributed uniformly over the periphery of the outer surface (18). The radial elevation (H) of the axial ribs is slightly greater than approximately half the difference between the inner diameter (D.sub.I) of the end section (6) and the outer diameter (D.sub.M) of the surface (18) of the bearing (16). To mount the bearing (16), the end section is elastically deformed so far until the diameter (D.sub.V) is slightly greater than the axial maximum outer diameter (24) of the bearing (16). The diameter (D.sub.V) is measured from a corner (27) and the maximum outer diameter (24) is determined by the radi…