HAND-HELD MACHINE TOOL HAVING A STRIKING MECHANISM

• US 20130161044A1
• Filed: 05/19/2011
• Published: 06/27/2013
• Est. Priority Date: 06/23/2010
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Hecht, Joachim, Kraus, Martin
• Granted Patent: US 9,999,930 B2
• Time in Patent Office: Days
• US Class Current: 173/90
• CPC Class Codes: B23B 2231/04 Adapters
• CPC Class Codes: B23B 31/12 Chucks with simultaneously-acting jaws, whether or not also individually adjustable
• CPC Class Codes: B23B 31/1238 Jaws movement actuated by a nut with conical screw-thread
• CPC Class Codes: B23Q 3/12 for securing to a spindle in general B23Q3/152 takes precedence; chucks B23B31/02
• CPC Class Codes: B25D 16/00 Portable percussive machines with superimposed rotation , the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit combined percussion and rotary drilling adapted for earth drilling E21B6/00
• CPC Class Codes: B25D 17/005 Attachments or adapters placed between tool and hammer
• CPC Class Codes: B25D 17/088 with radial movable locking elements co-operating with bit shafts specially adapted therefor
• CPC Class Codes: B25D 2217/0042 Ball-shaped locking members
• CPC Class Codes: B25F 3/00 Associations of tools for different working operations with one portable power-drive means; Adapters therefor
• CPC Class Codes: Y10T 279/3406 Adapter

Abstract

In a hand-held machine tool, having a tool holder for holding at least one first tool, which has a tang having a first coupling contour that is able to be connected to the tool holder and having a striking mechanism for the striking drive of the first tool connected to the tool holder in the axial direction of the tool holder in a striking operation associated with the hand-held machine tool, a chuck adapter is provided to hold at least one second tool, which has a tang provided with a second coupling contour, which is able to be connected to the chuck adapter in a torsionally fixed manner.

Claims

1-17. -17. (canceled)

18. A hand-held machine tool, comprising:

a tool holder;

at least one first tool having a tang provided with a first coupling contour, wherein the first tool is configured to be selectively connected to the tool holder in a torsionally fixed manner;

a striking mechanism for a striking drive of the first tool connected to the tool holder in an axial direction of the tool holder in a striking operation associated with the hand-held machine tool; and

a chuck adapter configured to be selectively connected in a torsionally fixed manner to the tool holder for holding at least one second tool which has a tang provided with a second coupling contour, wherein the second tool is configured to be selectively connected to the chuck adapter in a torsionally fixed manner.

19. The hand-held machine tool as recited in claim 18, wherein the first tool is configured for one of impact drilling or screwing, and wherein the second tool is configured for drilling.

20. The hand-held machine tool as recited in claim 18, wherein:

the tang of the first tool has one of (i) a circular cross section having at least two diametrically opposite, radial enlargements, or (ii) a many-sided cross section; and

the tang of the second tool has a circular cross section.

21. The hand-held machine tool as recited in claim 20, wherein the first tool is one of an SDS-Mini tool or a HEX tool.

22. The hand-held machine tool as recited in claim 20, wherein the second tool is a round tang drill.

23. The hand-held machine tool as recited in claim 20, wherein the tool holder has a spring-loaded locking sleeve for locking the first tool in the tool holder.

24. The hand-held machine tool as recited in claim 20, wherein the chuck adapter has a locking tang provided with a first coupling contour for the torsionally fixed connection to the tool holder.

25. The hand-held machine tool as recited in claim 24, wherein the chuck adapter has an actuating sleeve for locking the locking tang in the tool holder, and wherein the actuating sleeve is configured for the actuation of the spring-loaded locking sleeve.

26. The hand-held machine tool as recited in claim 25, wherein the actuating sleeve has a locking member for unlocking the tool holder by locking of the spring-loaded locking sleeve in the axial direction.

27. The hand-held machine tool as recited in claim 25, wherein the actuating sleeve is connected to a restoring spring which acts on the actuating sleeve axially, in the direction of the chuck adapter, the actuating sleeve being displaceable for actuating the spring-loaded locking sleeve against a restoring force provided by the restoring spring axially in the direction of the locking sleeve.

28. The hand-held machine tool as recited in claim 25, wherein the actuating sleeve is rotatable about a longitudinal axis associated with the chuck adapter for actuating the spring-loaded locking sleeve.

29. The hand-held machine tool as recited in claim 24, wherein the striking mechanism is a hammer striking mechanism.

30. The hand-held machine tool as recited in claim 29, wherein the striking mechanism has a striking pin configured to strikingly drive one of the first tool or the chuck adapter.

31. The hand-held machine tool as recited in claim 30, wherein the hand-held machine tool is a hammer drill having a screwdriving function.

32. The hand-held machine tool as recited in claim 31, wherein the hand-held machine tool is a cordless screwdriver having an integrated hammer striking mechanism.

33. A hand-held machine tool, comprising:

at least one first tool;

a tool holder for holding the at least one first tool, wherein the tool holder has a locking element for locking the first tool in the tool holder;

a hammer striking mechanism for striking drive of the first tool connected to the tool holder;

at least one second tool; and

a chuck adapter configured to be selectively connected to the tool holder in a torsionally fixed manner to hold the at least one second tool, wherein the chuck adapter has an actuating element for actuating the locking element in response to a connection of the chuck adapter to the tool holder.

34. A chuck adapter for a hand-held machine tool having a tool holder for holding at least one first tool which has a tang provided with a first coupling contour, the first tool being configured to be selectively connected to the tool holder in a torsionally fixed manner, the hand-held machine tool being provided with a striking mechanism for striking drive of the first tool connected to the tool holder in the axial direction of the tool holder in a striking operation associated with the hand-held machine tool, the chuck adapter comprising:

means for selectively connecting to the tool holder in a torsionally fixed manner; and

means for holding at least one second tool which has a tang provided with a second coupling contour, wherein the at least one second tool is able to be connected to the chuck adapter in a torsionally fixed manner.