Hand-operated machine-tool comprising a vibration-damping rotary handle

US7204744B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Justus Lamprecht · Dußlingen, DE
• Joachim Schadow · Stuttgart, DE
• Mario Frank · Solothurn, CH
• Siegfried Keusch · Deizisau, DE
• Ulrich Mueller-Boysen · Eßlingen, DE

Key dates

• Filing date: Jul 25, 2003
• Grant date: Apr 17, 2007
• Expiry date: Sep 22, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B25F5/006
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A handheld power tool, in particular a handheld right-angle grinder (10), has an electric motor drive for a motor housing (11) that accommodates a tool and also has a handle (15), which is retained on the motor housing (11) by means of a handle mounting device (30) located between them, which handle mounting device has a mount (40), fastened to the motor housing (11), and at least one vibration-damping element (50) that is in communication with the mount (40) and the handle (15). The handle mounting device (30) has a mounting plate (60), on which the handle (15) is fastened by means of a fixation device. The at least one vibration-damping element (50) is located between the mount (40) and the mounting plate (60) and is solidly joined to them to form a unitary component. Fastening members (70) engaging the mount (40) are provided, which fix the mount (40) to the motor housing (11) and are provided with securing elements (71) that are free-standing relative to the mounting plate (60) and that, if the vibration-damping element (50) is torn, firmly retain the mounting plate (60) along with the handle (15) mounted on it (FIG. 1).