Power supply module for an electric power tool

• US 8,033,344 B2
• Filed: 04/20/2009
• Issued: 10/11/2011
• Est. Priority Date: 03/12/2004
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Rejman, Marcin, Glauning, Rainer, Matthias, Wolf
• Primary Examiner(s): Nash; Brian D
• Application Number:
  US12/426,507
• Publication Number:
  US 20090202895A1
• Time in Patent Office: 904 Days
• Field of Search: 173/171, 173/217, 310/47, 310/50, 429/100
• US Class Current: 173/217
• CPC Class Codes: B25F 5/02 Construction of casings, bodies or handles B25F5/006, B25F5/008 take precedence

Abstract

A power supply module for interchangeable attachment to an electric tool has a module housing, which receives a battery and an introduction dome, formed integrally onto the module housing, for guiding the tool, on which dome there is an electrical interface with the electric power tool and at least one form-locking element for making a form lock with the tool housing is located.

Claims

1. A power supply module for interchangeable attachment to a tool housing (12) of an electric power tool, comprising

a module housing (13) that receives a battery or an accumulator;

an introduction dome (14) for guiding attachment of the power supply module to the tool housing (12), which introduction dome (14) is formed integrally on the module housing and on which there is an electrical interface with the electric power tool; and

at least one form-locking element for producing a form lock with the tool housing (12), which form-locking element comprises a recess (20) formed in a side wall and located on a free end of the introduction dome (14), wherein an axial length of the recess (20) is less than an axial length of the introduction dome (14).

2. The power supply module in accordance with claim 1, wherein the recess (20) extends into an opening on the free end of the introduction dome (14).

3. The power supply module in accordance with claim 1, wherein the recess (20) has a triangular inside cross section.

4. The power supply module in accordance with claim 1, wherein the recess (20) has a trapezoidal inside cross section, with a larger trapezoidal outline pointing away from the introduction dome (14).

5. The power supply module in accordance with claim 1, wherein two recesses (20) spaced apart from one another are provided, which are located mirror-symmetrically to one another, and a plane of symmetry extends through a longitudinal axis of the introduction dome (14).

6. The power supply module in accordance with claim 5, wherein the introduction dome (14) has a box-shaped profile, with a convex profile wall (141), and the two recesses (20) are located in the convex profile wall (141).

7. A power supply module for interchangeable attachment to a tool housing (12) of an electric power tool in an axial direction of insertion, comprising:

a module housing (13) that receives a battery or an accumulator; and

an introduction dome (14) for guiding attachment of the power supply module to the tool housing (12), which introduction dome is formed integrally on the module housing and extending in the direction of insertion and on which there is an electrical interface with the electric power tool,

wherein at least one form-locking element for producing a form lock with a form-locking element of the tool housing (12) is located on a free end of the introduction dome (14),

said at least one form-locking element being a recess (20) located in a side wall of the introduction dome (14) and extending in a direction of insertion,

wherein the recess (20) extends into an opening on a free end of the introduction dome (14) and over a limited portion of the introduction dome in such a manner that the recess (20) and the form-locking element of the tool housing (12) come into engagement with one another only toward an end of an insertion travel of the power supply module.