Hand-held machine tool having a grinding disk

Abstract

A hand-held machine tool comprises a housing (12) and a grinding disk (30) disposed on the underside (13) thereof. Said grinding disk has an upper face (46) facing the housing (12) and a lower face (48) comprising a hook-and-loop fastener (50) for receiving a grinding strip (52), and a center opening (34) extending through the upper face and lower face (48, 46), especially for engagement of a fastening means (28) for coupling the disk to the hand-held machine tool. Wholes (32, 33) extend through the grinding disk (30) between its lower and upper face (46, 48) and communicate with an extraction channel (42), the center opening (34) extending axially through the grinding disk (30). In order to improve grinding dust extraction, the center opening (34) communicates with one of the wholes (32) via a connecting channel (58) that radially or transversely extends on the lower face (48), and is used as an extraction opening.

Description

technical field [0001] The invention relates to a hand-held power tool according to the preamble of claim 1 with a grinding disc having holes for dust suction. Background technique [0002] According to DE 1953 042 a hand-held power tool is known which has a grinding disc which has holes for suctioning dust. Grinding dust falling below the grinding disc or the grinding disc is sucked upwards and then radially outwards through bores arranged radially outside the center of the grinding disc and conveyed into a dust container. The grinding dust formed in the central region of the grinding disc in the form of a grinding dust mat is blown away here by means of an overpressure at the central bore and is sucked out through the radially outer bores because the grinding dust mat interferes Contact of the grinding disc with the workpiece to be ground and tends to melt due to heat and stick firmly to the grinding disc and prevent effective grinding. [0003] The design of the separat...

AI Technical Summary

Problems solved by technology

The grinding dust formed in the central region of the grinding disc in the form of a grinding dust mat is blown away here by means of an overpressure at the central bore and is sucked out through the radially outer bores because the grinding dust mat interferes Contact of the grinding disc with the workpiece to be ground and tends to melt due to heat and stick firmly to the grinding disc and hinder effective grinding

[0003] The design of the separate suction and blow-off system above the grinding disc complicates and costs the machining of the hand-held power tool

When the hand tool is removed from the workpiece, the blow-out action in the middle of the grinding disc leads to swirls of grinding dust and negatively affects the air surrounding the operator

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