Hand-held machine tool with slip clutch

Details Hand-held machine tool with slip clutch Hand-held machine tool with slip clutch

2011-01-04

2011-01-04

Rada, Rinaldi I. (Department: 3721)

Tool driving or impacting

Automatic control of power operated means

Drive means responsive to torque or speed condition

C173S104000, C173S048000, C192S056620

Reexamination Certificate

active

07861797

ABSTRACT:
An at least partially rotating and axially percussive hand-held machine tool (4) has an impact mechanism (5) with a guide tube (6) in which a percussion piston (7) is driven in an axially percussive manner by a pneumatic spring (8) and with a slip clutch (10) which is driven in rotation, encloses the guide tube (6), is provided axially with cams (9), and has a driving sleeve (11) and driven sleeve (12) which are biased axially relative to one another under pressure by a spring (13). The driving sleeve (11) is connected by positive engagement to a control sleeve (14) coaxial to the driving sleeve by balls (18) which partially engage, respectively, in two control contours (19a,19b) of the driving sleeve (11) and of the control sleeve (14), which control contours (19a,19b) are arranged partially opposite one another, and the driving sleeve (11) is positively guided in such a way that the driving sleeve (11), which is axially biased under pressure by the spring (13), is displaced axially and rotated relative to the control sleeve (14) when a limiting torque is exceeded.

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