초록 ▼

A hand-held drill hammer has a housing, a shaft (12) connected to a drive shaft (30), and a lifting bearing (14). The lifting bearing (14) is supported and the shaft (12) for converting rotary motion into a reciprocating motion. In a first switching configuration, a percussion drive connection exis

A hand-held drill hammer has a housing, a shaft (12) connected to a drive shaft (30), and a lifting bearing (14). The lifting bearing (14) is supported and the shaft (12) for converting rotary motion into a reciprocating motion. In a first switching configuration, a percussion drive connection exists between the shaft (12) and the lifting bearing (14). In a second switching configuration, the percussion drive connection is interrupted. The lifting bearing (14) may be fixed with respect to a reference system of the housing in the second switching configuration.

대표청구항 ▼

The invention claimed is: 1. A hand-held tool, in particular a drill hammer (10), comprising a housing, a shaft (12) connected to a drive shaft (30), a lifting bearing (14) supported on the shaft (12) for converting a rotary motion into a reciprocating motion, wherein said shaft (12) and said lifti

The invention claimed is: 1. A hand-held tool, in particular a drill hammer (10), comprising a housing, a shaft (12) connected to a drive shaft (30), a lifting bearing (14) supported on the shaft (12) for converting a rotary motion into a reciprocating motion, wherein said shaft (12) and said lifting bearing (14) are configured so that in at least a first switching configuration a percussion drive connection exists between said shaft (12) and said lifting bearing (14) and in at least a second switching configuration the percussion drive connection is interrupted, a retention means (16) which fixes said lifting bearing (14) with respect to a reference system of said housing in the second switching configuration, wherein the retention means (16) is located on a switch element (18) for axial displacement of the shaft (12), and wherein a detent profile (22a) is provided on one edge of the lifting bearing (14a) as means for fixation relative to a reference system of a housing of the hand-held tool, wherein the switch element (18) in the second switching configuration has an at least friction-locking rotary connection with the lifting bearing (14). 2. The hand-held tool as defined by claim 1, further comprising a friction lining (20) for making a friction-locking rotary connection between the lifting bearing (14) and the retention means (16). 3. The hand-held tool as defined by claim 1, further comprising a form-locking element (24a) for form-locking connection of the lifting bearing (14a) to the switch element (18a) in a circumferential direction (26a) relative to the shaft (12a). 4. The hand-held tool as defined by claim 3, wherein the form-locking element (24a) is provided for engaging a corresponding form-locking element (24a') in a switching motion direction (28a) of the switch element (18a). 5. The hand-held tool as defined by claim 1, further comprising a synchronizing means (32a) for synchronizing the lifting bearing (14a) with the retention means (16a). 6. The hand-held tool as defined by claim 1, wherein the percussion drive connection is configured for driving a pneumatic percussion mechanism (34). 7. A hand-held tool, in particular a drill hammer (10), comprising a housing, a shaft (12) connected to a drive shaft (30), a lifting bearing (14) supported on the shaft (12) for converting a rotary motion into a reciprocating motion, wherein said shaft (12) and said lifting bearing (14) are configured so that in at least a first switching configuration a percussion drive connection exists between said shaft (12) and said lifting bearing (14) and in at least a second switching configuration the percussion drive connection is interrupted, a retention means (16) which fixes said lifting bearing (14) with respect to a reference system of said housing in the second switching configuration, wherein the retention means (16) is located on a switch element (18) for axial displacement of the shaft (12), and wherein a detent profile (22a) is provided on one edge of the lifting bearing (14a) as means for fixation relative to a reference system of a housing of the hand-held tool, further comprising a friction lining (20) for making a friction-locking rotary connection between the lifting bearing (14) and the retention means (16). 8. A hand-held tool as defined in claim 7, further comprising a form-locking element (24a) for form-locking connection of the lifting bearing (14a) to the switch element (18a) in a circumferential direction (26a) relative to the shaft (12a). 9. A hand-held power tool as defined in claim 8, wherein the form-locking element (24a) is provided for engaging a corresponding form-locking element (24a') in a switching motion direction (28a) of the switch element (18a). 10. A hand-held power tool as defined in claim 7, further comprising a synchronizing means (32a) for synchronizing the lifting bearing (14a) with the retention means (16a). 11. A hand-held power tool as defined in claim 7, wherein the percussion drive connection is configured for driving a pneumatic percussion mechanism (34). 12. A hand-held power tool, in particular a drill hammer (10), comprising a housing, a shaft (12) connected to a drive shaft (30), a lifting bearing (14) supported on the shaft (12) for converting a rotary motion into a reciprocating motion, wherein said shaft (12) and said lifting bearing (14) are configured so that in at least a first switching configuration a percussion drive connection exists between said shaft (12) and said lifting bearing (14) and in at least a second switching configuration the percussion drive connection is interrupted, a retention means (16) which fixes said lifting bearing (14) with respect to a reference system of said housing in the second switching configuration, wherein the retention means (16) is located on a switch element (18) for axial displacement of the shaft (12), and wherein a detent profile (22a) is provided on one edge of the lifting bearing (14a) as means for fixation relative to a reference system of a housing of the hand-held tool, further comprising a form-locking element (24a) for form-locking connection of the lifting bearing (14a) to the switch element (18a) in a circumferential direction (26a) relative to the shaft (12a). 13. A hand-held power tool as defined in claim 12, wherein the form-locking element (24a) is provided for engaging a corresponding form-locking element (24a') in a switching motion direction (28a) of the switch element (18a). 14. A hand-held power tool as defined in claim 12, further comprising a synchronizing means (32a) for synchronizing the lifting bearing (14a) with the retention means (16a). 15. A hand-held power tool as defined in claim 12, wherein the percussion drive connection is configured for driving a pneumatic percussion mechanism (34).