Electric hand machine-tool and power supply module for an electric hand machine tool

• US 7,552,780 B2
• Filed: 01/31/2005
• Issued: 06/30/2009
• Est. Priority Date: 03/12/2004
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Glauning, Rainer, Rejman, Marcin, Matthias, Wolf
• Primary Examiner(s): Nash; Brian D
• Application Number:
  US10/552,214
• Publication Number:
  US 20060199073A1
• Time in Patent Office: 1,611 Days
• Field of Search: 173/171, 173/217, 310/47, 310/50
• US Class Current: 173/171
• CPC Class Codes: B25F 5/02 Construction of casings, bodies or handles B25F5/006, B25F5/008 take precedence

Abstract

An electric power tool and a power supply module for interchangeable attachment to an electric power tool are disclosed. The electric power tool has a tool housing (12) with a guide sleeve (15) for interchangeably receiving the power supply module (11), which has an introduction opening (152) and an electrical interface. To achieve high resistance to vibration of the contacting at the module/tool interface, at least one form-locking element (21) for making a form lock with the power supply module (11) is located in the end region, remote from the introduction opening of the guide sleeve (15). The power supply module (11) has a module housing (13), which receives a battery and an introduction dome (14), 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 (15) is located (FIG. 2).

Claims

1. An electric power tool,

having a tool housing (12) in which a guide sleeve (15) is formed for interchangeably receiving a power supply module (11) in an axial direction of insertion, the guide sleeve (15) having an introduction opening (152) and an electrical interface with the power supply module (11) and extending in the direction of insertion, wherein at least one form-locking element for producing a form lock with a form-locking element of the power supply module (11) is disposed in an end region of the guide sleeve facing away from the introduction opening (152) as viewed in the direction of insertion, wherein the at least one form-locking element is a rib (21) protruding from an inner wall of the guide sleeve (15), and wherein the rib (21) extends from the end, facing away from the introduction opening (152), of the guide sleeve (15) over only a limited portion of the guide sleeve (15) in such a manner that the rib (21) and the form-locking element of the power supply module (11) come into engagement with one another only toward an end of an insertion travel of the power supply module.

2. The electric power tool in accordance with claim 1, wherein the rib (21) is embodied in one piece with the guide sleeve (15).

3. The electric power tool in accordance with claim 1, wherein the end face of the rib (21) pointing toward the introduction opening (152) of the guide sleeve (15) has rounded edges and corners.

4. The electric power tool in accordance with claim 1, wherein the rib (21) has a triangular cross section.

5. The electric power tool in accordance with claim 1, wherein the rib (21) has a trapezoidal cross section, with a larger trapezoidal outline resting on the sheath wall.

6. The electric power tool in accordance with claim 1, wherein two ribs (21) spaced apart from one another are provided, which are located mirror-symmetrically to one another, and the plane of symmetry extends through the longitudinal axes of the guide sleeve (15).

7. The electric power tool in accordance with claim 6, wherein the guide sleeve (15) has a boxlike profile, with a convex profile wall (151), and that the ribs (21) are located in the convex profile wall (151).

8. The electric power tool in accordance with claim 1, having a mating power supply module for interchangeable attachment to the tool housing of the electric power tool in an axial direction of insertion, the power supply module having a module housing (13) that receives the battery or an accumulator and an introduction dome (14), for guiding the tool, 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 the tool housing (12) is located on a free end of the introduction dome (14), wherein the at least one form-locking element is a recess (20) located in the side wall of the introduction dome (14), and wherein the recess (20) extends in the direction of insertion into the open on the 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 power supply module (11) come into engagement with one another only toward an end of the insertion travel of the power supply module.

9. The electric power tool in accordance with claim 8, wherein the recess (20) has a trapezoidal inside cross section, with a larger trapezoidal outline pointing away from the introduction dome (14).

10. The electric power tool in accordance with claim 8, wherein two recesses (20) spaced apart from one another are provided, which are located mirror-symmetrically to one another, and the plane of symmetry extends through the longitudinal axis of the introduction dome (14).

11. The electric power tool in accordance with claim 10, wherein the introduction dome (14) has a boxlike profile, with a convex profile wall (141), and that the two recesses (20) are located in the convex profile wall (141).

12. The electric power tool in accordance with claim 8, wherein the recess (20) has a triangular inside cross section.

13. An electric power tool, having a tool housing (12) in which a guide sleeve (15) is formed for interchangeably receiving a power supply module (11) in an axial direction of insertion, the guide sleeve (15) having an introduction opening (152) and an electrical interface with the power supply module (11) and extending in the direction of insertion, wherein at least one form-locking element for producing a form lock with a form-locking element of the power supply module (11) is disposed in an end region of the guide sleeve facing away from the introduction opening (152) as viewed in the direction of insertion, wherein the at least one form-locking element is a rib (21) protruding from an inner wall of the guide sleeve (15), and wherein the rib (21) extends from the end region of guide sleeve facing away from the introduction opening (152) over only a limited portion of the guide sleeve (15) that is substantially less than half of a length of the guide sleeve, in such a manner that the rib (21) and the form-locking element of the power supply module (11) come into engagement with one another only toward an end of an insertion travel of the power supply module.

14. The electric power tool in accordance with claim 13, wherein two ribs (21) spaced apart from one another are provided, which are located mirror-symmetrically to one another, and the plane of symmetry extends through the longitudinal axes of the guide sleeve (15).

15. The electric power tool in accordance with claim 14, wherein the guide sleeve (15) has a boxlike profile, with a convex profile wall (151), and that the ribs (21) are located in the convex profile wall (151).

16. The electric power tool in accordance with claim 13, having a mating power supply module for interchangeable attachment to the tool housing of the electric power tool, the power supply module having a module housing (13) that receives the battery or an accumulator and an introduction dome (14), for guiding the tool, formed integrally on the module housing 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 the tool housing (12) is located on a free end of the introduction dome (14), wherein the at least one form-locking element is a recess (20) located in the side wall of the introduction dome (14), and wherein the recess (20) has a triangular inside cross section and extends over a limited portion of the introduction dome as viewed in a longitudinal direction.

17. The electric power tool in accordance with claim 16, wherein the recess (20) extends into the open on the free end of the introduction dome (14).

18. The electric power tool in accordance with claim 16, wherein the recess (20) has a trapezoidal inside cross section, with a larger trapezoidal outline pointing away from the introduction dome (14).

19. The electric power tool in accordance with claim 16, wherein two recesses (20) spaced apart from one another are provided, which are located mirror-symmetrically to one another, and the plane of symmetry extends through the longitudinal axis of the introduction dome (14).

20. The electric power tool in accordance with claim 19, wherein the introduction dome (14) has a boxlike profile, with a convex profile wall (141), and that the two recesses (20) are located in the convex profile wall (141).