Drill or chisel hammer
AssigneeRobert Bosch GmbH
InventorsOtto Baumann, Dietmar Saur
Life of this patent
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Abstract
The invention is based on a power tool having a beater mechanism (14) and a coupling device (12, 100), which can be engaged and disengaged in order to make and break a drive connection (16, 102) of the beater mechanism (14). It is proposed that the coupling device (12, 100) has a synchronizing device (18, 112), with a detent mechanism (20, 110) which transmits a drive moment and which in a synchronizing operation has at least two corresponding detent elements (22, 24, 108), at least one of the detent elements (22) being movable about its detent position upon an overlooking moment, counter to the spring force of a spring element (26, 116).
Claims13
A drilling- and/or chipping hammer having a beater mechanism (14) and a coupling device (12, 100), which is engageable and disengageable in order to make and break a drive connection (16, 102) of the beater mechanism (14), wherein the coupling device (12, 100) has a synchronizing device (18, 112), with a detent mechanism (20, 110) which transmits a drive moment to the beater mechanism (14) and which has at least two corresponding detent elements (22, 24, 108), wherein said coupling device (12, 100) has two coupling elements (32, 44, 104, 122), wherein the two coupling elements (32, 44, 104, 122) are synchronized by the synchronizing device (18, 112) when the coupling device (12, 100) is engaged, at least one of the detent elements (22) being movable about its detent position upon an overlooking moment, counter to a spring force of a spring element (26, 116), wherein said coupling elements (32, 44, 104, 122) have correspondingly embodied clawlike positive-engagement elements (48, 50) bridging said synchronizing device (18, 112) when the coupling device (12) is fully engaged.
Dependencies are inferred from the claim text.