Metabowerke Gmbh

Ralph Liersch

Wolfgang Stickel

Jochen Graeber

Jochen Gräber

The invention relates to a rechargeable battery pack, for use with an electrical hand tool device and which includes at least two series-connected rechargeable battery cells and/or rechargeable battery cell blocks, and an electronics unit having a printed circuit board, and wherein sheet metal conductors for electrically connecting the series-connected rechargeable battery cells and/or rechargeable battery cell blocks are provided, and wherein the sheet metal conductors are connected directly to the printed circuit board.

Rechargeable battery pack and electrical hand tool device

The invention relates to a rechargeable battery pack, in particular for an electrical hand tool device, comprising at least two series-connected rechargeable battery cells () and/or rechargeable batter cell blocks and an electronics unit having a printed circuit board (), wherein sheet metal conductors () for electrically connecting the series-connected rechargeable battery cells () and/or rechargeable battery cell blocks are provided, wherein the sheet metal conductors () are connected directly to the printed circuit board ().

A rapid locking device axially secures a disc-type tool (), in particular a grinding disc on the flange () of a driven spindle (), the spindle () having an axial bore containing at least one locking element in the form of a plate spring (), which co-operates with a locking pad (). The tool can be locked between contact surfaces of the flange () and the locking pad (), the distance between said surfaces being modifiable. The shank () of the locking pad () can be accommodated in the bore of the spindle () and can be secured in a friction fit by the locking element ().

Rapid locking device

A tensioning nut to secure a disk-shaped tool is threadable onto the threaded spindle of an electric tool, particularly an electric hand tool with run-out brake such as a right-angle grinder. The nut includes a nut body provided with a corresponding thread, with a coaxially-positioned pressure ring that may be tensioned with the disk-shaped tool. An axial bearing is positioned between the ring and the nut body. The nut further includes a disk member within the nut body for preventing rotation of the pressure ring. At least one engagement device is positioned between the disk member and the surrounding wall of the nut body. This blocking mechanism forms a uni-directional coupling, whereby a disengagement exists between the nut body in its tensioning direction and the disk member, and locking occurs between both of them in the opposing direction of the nut body relative to the disk member. Thus, loosening of the tensioning nut is prevented particularly during run-out of the rotating, disk-shaped tool.

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Metzingen, Germany

Ralph Liersch