Hand power tool, in particular drilling screwdriver
First Claim
1. A hand power tool, comprising a power tool housing;
- a tool spindle supported rotatably in said housing;
a drive train via which said tool spindle is drivable to rotate;
a cam device located in said drive train and having two cam discs in engagement with one another for transmitting axial percussion motions to said tool spindle;
an overloading coupling located in said drive train and having two coupling parts which are in engagement with one another and are overloadable counter to an axially exerted force;
a coupling spring exerting said axial force;
a blocking device which upon its activation blocks a relative rotation of said coupling parts of said overloading coupling to one another; and
an operating mode setting device for setting “
percussion drilling”
, “
drilling” and
“
screw driving”
operating modes, and also a magnitude of an overloading moment upon screwdriving, said operating mode setting device having two adjusting rings located on said power tool housing and rotatable manually to define setting positions and acting on said cam device, said overloading coupling and said blocking device, wherein one of said adjusting rings is a torque adjusting ring and sets the “
drilling”
operating mode and the “
screwdriving”
operating mode, with preselection of the magnitude of the overloading moment, while the other of said adjusting rings is embodied as a function adjusting ring and switches the “
percussion drilling”
operating mode on and off, and in its position that switches the “
percussion drilling”
operating mode on, it overrides any operating mode set by said torque adjusting ring, wherein said torque adjusting ring has a plurality of setting positions and accesses said overloading coupling and said blocking device in such a way that in a setting position that sets the “
drilling”
operating mode, said blocking device is activated, and in other setting positions the blocking device is deactivated, and said coupling spring of said overloading coupling is prestressed variously strongly, said function adjusting ring having two setting positions and accesses said cam device and said blocking device in such a way that in one setting position said “
percussion drilling”
operating mode is switched on and said blocking device is activated, and in the another setting position, said percussion drilling function is switched off and said blocking device is deactivated.
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Accused Products
Abstract
A hand power tool has a tool spindle rotatable by a drive train, a cam device located in the drive train and having two cam discs in engagement with one another for transmitting axial percussion motions to the tool spindle, an overloading coupling located in the drive train and having two coupling parts which are in engagement with one another and are overloadable counter to an axially exerted force, a blocking device which upon its activation blocks a relative rotation of the coupling parts of the overloading coupling to one another, and an operating mode setting device for setting “percussion drilling”, “drilling” and “screw driving” operating modes, and also a magnitude of an overlocking moment upon screwdriving and having one torque adjusting ring for setting the “drilling” operating mode and the “screwdriving” operating mode, with preselection of the magnitude of the overlocking moment, and another adjusting the “percussion drilling” operating mode on and off, and in “on” position overrides any operating mode set by the torque adjusting ring.
106 Citations
14 Claims
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1. A hand power tool, comprising a power tool housing;
- a tool spindle supported rotatably in said housing;
a drive train via which said tool spindle is drivable to rotate;
a cam device located in said drive train and having two cam discs in engagement with one another for transmitting axial percussion motions to said tool spindle;
an overloading coupling located in said drive train and having two coupling parts which are in engagement with one another and are overloadable counter to an axially exerted force;
a coupling spring exerting said axial force;
a blocking device which upon its activation blocks a relative rotation of said coupling parts of said overloading coupling to one another; and
an operating mode setting device for setting “
percussion drilling”
, “
drilling” and
“
screw driving”
operating modes, and also a magnitude of an overloading moment upon screwdriving, said operating mode setting device having two adjusting rings located on said power tool housing and rotatable manually to define setting positions and acting on said cam device, said overloading coupling and said blocking device, wherein one of said adjusting rings is a torque adjusting ring and sets the “
drilling”
operating mode and the “
screwdriving”
operating mode, with preselection of the magnitude of the overloading moment, while the other of said adjusting rings is embodied as a function adjusting ring and switches the “
percussion drilling”
operating mode on and off, and in its position that switches the “
percussion drilling”
operating mode on, it overrides any operating mode set by said torque adjusting ring, wherein said torque adjusting ring has a plurality of setting positions and accesses said overloading coupling and said blocking device in such a way that in a setting position that sets the “
drilling”
operating mode, said blocking device is activated, and in other setting positions the blocking device is deactivated, and said coupling spring of said overloading coupling is prestressed variously strongly, said function adjusting ring having two setting positions and accesses said cam device and said blocking device in such a way that in one setting position said “
percussion drilling”
operating mode is switched on and said blocking device is activated, and in the another setting position, said percussion drilling function is switched off and said blocking device is deactivated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a tool spindle supported rotatably in said housing;
-
10. A hand power tool, comprising a power tool housing;
- a tool spindle supported rotatably in said housing;
a drive train via which said tool spindle is drivable to rotate;
a cam device located in said drive train and having two cam discs in engagement with one another for transmitting axial percussion motions to said tool spindle;
an overloading coupling located in said drive train and having two coupling parts which are in engagement with one another and are overloadable counter to an axially exerted force;
a coupling spring exerting said axial force;
a blocking device which upon its activation blocks a relative rotation of said coupling parts of said overloading coupling to one another; and
an operating mode setting device for setting “
percussion drilling”
, “
drilling” and
“
screw driving”
operating modes, and also a magnitude of an overloading moment upon screwdriving, said operating mode setting device having two adjusting rings located on said power tool housing and rotatable manually to define setting positions and acting on said cam device, said overloading coupling and said blocking device, wherein one of said adjusting rings is a torque adjusting ring and sets the “
drilling”
operating mode and the “
screwdriving”
operating mode, with preselection of the magnitude of the overloading moment, while the other of said adjusting rings is embodied as a function adjusting ring and switches the “
percussion drilling”
operating mode on and off, and in its position that switches the “
percussion drilling”
operating mode on, it overrides any operating mode set by said torque adjusting ring, wherein a plurality of said setting positions are located on said torque adjusting ring such that said overloading moment increasing from one setting position to a next one, and said second position for setting position for setting the “
drilling”
operating mode is located at an end of a path of rotation of said torque adjusting ring.
- a tool spindle supported rotatably in said housing;
-
11. A hand power tool, comprising a power tool housing;
- a tool spindle supported rotatably in said housing;
a drive train via which said tool spindle is drivable to rotate;
a cam device located in said drive train and having two cam discs in engagement with one another for transmitting axial percussion motions to said tool spindle;
an overloading coupling located in said drive train and having two coupling parts which are in engagement with one another and are overloadable counter to an axially exerted force;
a coupling spring exerting said axial force;
a blocking device which upon its activation blocks a relative rotation of said coupling parts of said overloading coupling to one another; and
an operating mode setting device for setting “
percussion drilling”
, “
drilling” and
“
screw driving”
operating modes, and also a magnitude of an overloading moment upon screwdriving, said operating mode setting device having two adjusting rings located on said power tool housing and rotatable manually to define setting positions and acting on said cam device, said overloading coupling and said blocking device, wherein one of said adjusting rings is a torque adjusting ring and sets the “
drilling”
operating mode and the “
screwdriving”
operating mode, with preselection of the magnitude of the overloading moment, while the other of said adjusting rings is embodied as a function adjusting ring and switches the “
percussion drilling”
operating mode on and off, and in its position that switches the “
percussion drilling”
operating mode on, it overrides any operating mode set by said torque adjusting ring, wherein one coupling part of said overloading coupling is formed by a ring gear of a planetary gear having internal toothing and an external detent lock with detent lugs and detent gaps, the other coupling part of said overloading coupling being formed by an axially displaceable transmission ring fixed against relative rotation, that is acted upon by said coupling spring, said blocking device having at least two axially displaceable slide wedges fixed against relative rotation, which are insertable counter to spring force into said detent gaps of said detent lock on said ring gear. - View Dependent Claims (12)
- a tool spindle supported rotatably in said housing;
-
13. A hand power tool, comprising a power tool housing;
- a tool spindle supported rotatably in said housing;
a drive train via which said tool spindle is drivable to rotate;
a cam device located in said drive train and having two cam discs in engagement with one another for transmitting axial percussion motions to said tool spindle;
an overloading coupling located in said drive train and having two coupling parts which are in engagement with one another and are overloadable counter to an axially exerted force;
a coupling spring exerting said axial force;
a blocking device which upon its activation blocks a relative rotation of said coupling parts of said overloading coupling to one another; and
an operating mode setting device for setting “
percussion drilling”
, “
drilling” and
“
screw driving”
operating modes, and also a magnitude of an overloading moment upon screwdriving, said operating mode setting device having two adjusting rings located on said power tool housing and rotatable manually to define setting positions and acting on said cam device, said overloading coupling and said blocking device, wherein one of said adjusting rings is a torque adjusting ring and sets the “
drilling”
operating mode and the “
screwdriving”
operating mode, with preselection of the magnitude of the overloading moment, while the other of said adjusting rings is embodied as a function adjusting ring and switches the “
percussion drilling”
operating mode on and off, and in its position that switches the “
percussion drilling”
operating mode on, it overrides any operating mode set by said torque adjusting ring; and
further comprising an actuating unit configured for bringing said cam discs of said cam device into and out of engagement with one another and controlled by said function adjusting ring. - View Dependent Claims (14)
- a tool spindle supported rotatably in said housing;
Specification