Hand held power tool

• US 6,527,280 B2
• Filed: 01/11/2001
• Issued: 03/04/2003
• Est. Priority Date: 01/14/2000
• Status: Expired due to Term

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Meixner, Gerhard, Strasser, Andreas, Frauhammer, Karl, Schnerring, Heinz, Hellbach, Manfred
• Primary Examiner(s): WONG, STEVEN B
• Application Number:
  US09/759,833
• Publication Number:
  US 20010008186A1
• Time in Patent Office: 782 Days
• Field of Search: 279/19.4, 279/19.5, 279/75, 279/904, 279/905, 279/140
• US Class Current: 279/19.5
• CPC Class Codes: B25D 17/088 with radial movable locking elements co-operating with bit shafts specially adapted therefor
• CPC Class Codes: B25D 2216/0076 Angular position of the chisel modifiable by hand
• CPC Class Codes: B25D 2217/0049 Roll-shaped locking members
• CPC Class Codes: B25D 2250/365 Use of seals
• CPC Class Codes: Y10T 279/17085 Key retainer
• CPC Class Codes: Y10T 279/17752 Ball or roller jaws

Abstract

A hand held power tool formed as a hammer drill has a strikingly drivable tool holder having a base body, at least one locking body with which the base body is form-lockingly connectable and through which the base body is fixable in a rotary direction in at least two positions, the locking body being formed as a ring-shaped component.

Claims

1. A hand held power tool formed as a hammer drill comprising a strikingly drivable tool holder having a base body;

at least one locking body with which said base body is directly and form-lockingly connectable and through which said base body is fixable in a rotary direction in at least two positions, said locking body being formed as a ring-shaped component.

2. A hand held power tool as defined in claim 1, wherein said locking body is formed by a separate arresting ring.

3. A hand held power tool as defined in claim 1, wherein said locking body has a set of teeth with a plurality of recesses which in a cross-section are at least partially trapezoidal shaped.

4. A hand held power tool as defined in claim 1, wherein said locking body has a set of teeth with a plurality of teeth which in a cross-section are at least partially trapezoidal shaped.

5. A hand held power tool as defined in claim 1, wherein said base body of said tool holder is axially displaceable for providing an idling or a driving connection.

6. A hand held power tool as defined in claim 1;

and further comprising a non rotatable component having a set of teeth, said locking body being mounted on said base body of said tool holder and being guided in an axial direction in said set of teeth of said non rotatable component.

7. A hand held power tool as defined in claim 1;

and further comprising an actuating sleeve, said base body of said tool holder being supported on said actuating sleeve in a rotary direction through at least one set of teeth.

8. A hand held power tool as defined in claim 7;

and further comprising a housing part, said actuating sleeve being supported in a rotary direction in said housing part with at least one set of teeth.

9. A hand held power tool as defined in claim 8, wherein said actuating sleeve is displaceable in an axial direction, and a connection between said set of teeth and said actuating sleeve and said housing part is releasable by an axial actuating path before connection between said set of teeth and said actuating sleeve and said locking body.

10. A hand held power tool as defined in claim 8;

and further comprising a material ring, said set of teeth in said housing part being arranged radially inwardly of said material ring.

11. A hand held power tool as defined in claim 8;

and further comprising a material ring, said set of teeth in said housing part being arranged radially outwardly of said material ring.

12. A hand held power tool as defined in claim 8, wherein said set of teeth of said housing part formed as a cast part have a plurality of recesses which are at least partially round in a cross-section.

13. A hand held power tool as defined in claim 8, wherein said set of teeth of said housing part formed as a cast part have a plurality of teeth which are at least partially round in a cross-section.

14. A hand held power tool as defined in claim 7, wherein said actuating sleeve is composed of a synthetic plastic.

15. A hand held power tool as defined in claim 1, wherein said locking body is composed of a synthetic plastic.

16. A hand held power tool as defined in claim 7;

and further comprising sealing means for sealing from outside a space which surrounds said locking body.

17. A hand held power tool as defined in claim 16, wherein said sealing means is arranged between an actuating sleeve and a component which adjoins said actuating sleeve.