Hand power tool

• US 6,536,780 B2
• Filed: 02/07/2001
• Issued: 03/25/2003
• Est. Priority Date: 02/10/2000
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Baumann, Otto, Bohne, Ulrich, Saur, Dietmar, Mueller, Rolf
• Primary Examiner(s): Passaniti, Sebastiano
• Application Number:
  US09/778,227
• Publication Number:
  US 20010017447A1
• Time in Patent Office: 776 Days
• Field of Search: 279/19.4, 279/22, 279/30, 279/75, 279/905
• US Class Current: 279/19.4
• CPC Class Codes: B23Q 3/12 for securing to a spindle in general B23Q3/152 takes precedence; chucks B23B31/02
• CPC Class Codes: B25D 17/088 with radial movable locking elements co-operating with bit shafts specially adapted therefor
• CPC Class Codes: Y10S 279/905 with ball detent
• CPC Class Codes: Y10T 279/17076 Spreading elements
• CPC Class Codes: Y10T 279/17145 Ball or roller
• CPC Class Codes: Y10T 279/17752 Ball or roller jaws

Abstract

A hand power tool has a tool holder with a base body; a drive part; at least one locking body for connecting the base body of the tool holder with the drive part; a securing body which radially fixes the at least one locking body in an engaging position; an actuating element operative for unlocking the tool holder and guiding the securing body to a position which radially releases the locking body, the base body in a locking position surrounding at least a part of the drive part.

Claims

1. A hand power tool, comprising a tool holder having a base body;

a drive part;

at least one locking body for connecting said base body of said tool holder with said drive part;

a securing body which radially fixes said at least one locking body in an engaging position;

an actuating element operative for unlocking said tool holder and guiding said securing body to a position which radially releases said locking body, said base body in a locking position surrounds at least a part of said drive part; and

a component which in an unlocked position holds said at least one locking body in its unlocking position.

2. A hand power tool as defined in claim 1, wherein said at least one locking body is arranged in said tool holder.

3. A hand power tool as defined in claim 2, wherein said drive part is provided on a periphery with a plurality of recesses formed as said locking bodies in said base body.

4. A hand power tool as defined in claim 1, wherein said at least one component has a recess which radially inwardly closes said locking body.

5. A hand power tool as defined in claim 1, wherein said at least one locking body is loaded in its unlocking position in a locking direction.

6. A hand power tool as defined in claim 1, and further comprising at least one set of teeth which connects said base body and said drive part in a peripheral direction, said teeth having narrowing contact surfaces in an axial direction.

7. A hand power tool as defined in claim 1, and further comprising at least one roller which connects said base body and said drive part in a peripheral direction.

8. A hand power tool as defined in claim 1, wherein said at least one locking body is formed so that it is usable for a torque transmission.

9. A hand power tool as defined in claim 1, wherein said base body has an inner contour which is stepped toward said drive part, while said drive part has a corresponding outer contour.