Anti-friction bearing

US6698935B2 · kind B2 · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventor

• Joachim Kottke · Neckargröningen, DE

Key dates

• Filing date: Mar 15, 2002
• Grant date: Mar 2, 2004
• Expiry date: Mar 15, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/2186
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An anti-friction bearing, especially for supporting a shaft (2) of a gear case (3), is provided for a portable handheld work apparatus. The anti-friction bearing has an inner race (4) and an outer race (6) surrounding the inner race (4) at a radial distance (5). Roller elements (7) are arranged between the outer race (6) and the inner race (4). A cover disc (8) is provided at the anti-friction bearing (1) in order to prevent a passage of lubricant (27) through the anti-friction bearing (1). The cover disc (8) extends radially from the inner race (4) to an inner edge (9) of the outer race (6). The inner edge (9) faces axially toward the roller elements (7). A narrow radial gap (10) is provided between the cover disc (8) and the inner edge (9). The axial elevation (33) of a radial outer edge (28) of the cover disc (8) is equal to or less than the axial elevation (34) of the inner edge (9). The cover disc (8) is connected seal-tight to the inner race (4) and functions, during rotational operation of the anti-friction bearing, to throw off via centrifugal force lubricant striking the cover disc (8). In this way, a passage of lubricant through the anti-friction bearing (1) from the gear…