Hand power tool with a multi-part, manually operable quick-action chuck

US5161334A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Gunter Schaal · Stuttgart, DE
• Walter Barth · Leinfelden, DE
• Gerd Berner · Stuttgart, DE

Key dates

• Filing date: May 24, 1991
• Grant date: Nov 10, 1992
• Expiry date: May 24, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/9464
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

For a hand power tool (1) with a multi-part manually operable quick-action chuck (2) for a disc-shaped tool (3) which is held on a shoulder (4) of a drive spindle (5) and onto which a force can be loaded from the other side by a pressure plate (7), with the pressure plate (7) concentrically embracing a threaded part (13) and being arranged positionally secured in relation to the threaded part and rotatable, with a hand screw part (11) embracing the threaded part (13) and th pressure plate (7) like a sleeve, and forming an annulus (14) with these, which contains at least a rolling contact bearing (9) and a drive which couples together the hand screw part (11), the threaded part (13), and the pressure plate (7), for improved function and a simplified design, and for a limitation of the maximum clamping pressure on the tool, a rolling planetary drive is formed from at least one of the rolling contact bearings (9, 12) in conjunction with a springly element (10), the drive which couples the pressure plate (7), the threaded part (13), and the hand screw part (11).