Hand-held power tool

US11279016B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Andre Kurz · Bonlanden, DE
• Thomas Brinkmann · Ballwin, US
• Lars Schmid · Atzlenbach, DE
• Pascal Schmitz · Echterdingen, DE
• Hardy Schmid · Stuttgart, DE
• Patrick Heinen · Ludwigsburg, DE
• Jan Koalick · Leinfelden, DE

Key dates

• Filing date: Jun 1, 2018
• Grant date: Mar 22, 2022
• Expiry date: Sep 19, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B25D2250/275
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A system includes first and second power tools that each have a percussion mechanism, a motor, and a transmission. The transmission includes a striking mechanism and is configured to transfer a driving motion of the motor to an insert tool held in a tool holder. The transmission has a guide tube that is identical in some regions along a working axis and accommodates a striker. The guide tube is rotatably coupled to the motor by a first transmission unit. The striker is driven to linearly oscillate by a piston of a second transmission unit. A ratio between a diameter of the tool holder and a diameter of the guide tube is 1.8 times greater in the first power tool than in the second power tool. A striking energy of the second power tool is mechanically reduced compared to a striking energy of the first power tool.