Electrical connection arrangement for hand-held tools with auxiliary devices

• US 20050082920A1
• Filed: 10/15/2004
• Published: 04/21/2005
• Est. Priority Date: 10/16/2003
• Status: Active Grant

• Current Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Original Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Inventors: Heigl, Bernd, Paetow, Matthias
• Granted Patent: US 7,064,520 B2
• Time in Patent Office: Days
• US Class Current: 310/50
• CPC Class Codes: B25F 5/02 Construction of casings, bodies or handles B25F5/006, B25F5/008 take precedence

Abstract

An electrical connection arrangement (10) for a battery pack-powered electrical hand-hand tool (2) has an adapter (16) which can be arranged at an electric hand-held tool (2) and which, for the electrical connection of the electric hand-held tool (2) to a battery pack (4), has an electric battery terminal (20) for the connection of the battery pack (4) and an electric hand-held tool terminal (18) for detachable connection of the electric hand-held tool and electrically connected with the battery terminal (20), and an auxiliary device terminal (12) for the electrical connection of the auxiliary device (8) with the battery pack, which auxiliary device terminal (12) can be detached from the auxiliary device (8) and is electrically connected to the battery terminal (20).

Claims

1. An electrical connection (10) arrangement for a battery pack-powered electrical hand-held tool, comprising an adapter (16) connectable with the electrical hand-held tool (2) and a battery pack (4) for electrically connecting the electrical hand-held tool (2) with the battery pack (4), the adapter (16) including an electrical battery terminal (20) for releasably electrically connecting the adapter (16) with the battery pack (4), an electrical tool terminal (18) for releasably electrically connecting the adapter (16) with the electrical hand-held tool and which is electrically connected with the battery terminal (20), and an auxiliary terminal (12) for releasably electrically connecting the adapter (16) with an auxiliary tool (8) and which is electrically connected with the battery terminal (20).

2. Electrical connection arrangement according to claim 1, wherein the adapter (16) further includes a current shunt (50) connected to all three terminals (12, 18, 20) for dividing an input current flowing over the battery terminal during operation into an output current on a tool side and an output current on an auxiliary device side.

3. Electrical connection arrangement according to claim 1, wherein the adapter (16) includes fixing means (34) on a tool side thereof for mechanically connecting the adapter (16) with the hand-held tool (2) and fixing means (26) on a battery side for mechanically connecting the adapter (16) with the battery pack (4), and wherein the battery terminal (20) becomes electrically connected to the battery pack (4) and the hand-held tool terminal (18) becomes electrically connected to the hand-held tool (2) when the adapter (16) is mechanically connected with the battery pack (4) and the hand-held tool (2).

4. Electrical connection arrangement according to claim 3, wherein the fixing means (34) on the tool side has a shape adapted for being fixed to a battery receptacle (36) of the hand-held tool (2).

5. Electrical connection arrangement according to claim 4, wherein the hand-held tool terminal (18) is arranged at the tool-side fixing means (34) in an area which contacts a contact pair of the hand-held tool (2) provided for normal battery operation when the adapter (16) is mechanically connected with the hand-held tool (2).

6. Electrical connection arrangement according to claim 3, wherein the battery pack side fixing means (26) has a shape negative with respect to that of the fixing means (34) on the tool side.

7. Electrical connection arrangement according to claim 1, further comprising an auxiliary device plug (17) electrically connected to the auxiliary device terminal (12), the auxiliary device plug (17) having, in an area that can be mechanically connected to the auxiliary device (8), an outer geometry corresponding to the outer geometry of a battery pack contained in a product range of the auxiliary device (8).

8. Electrical connection arrangement according to claim 7, wherein the auxiliary device plug (17) has a detachable connection to the auxiliary device terminal (12).

9. Electrical connection arrangement according to claim 1, further comprising a voltage transformer (60) provided for a predetermined setting of a supply voltage for the auxiliary device (8).

10. Electrical connection arrangement according to claim 9, wherein the voltage transformer (60) is arranged in the auxiliary device plug.