Manual machine tool

A power tool comprising a toolholder (12, 102) driveable in at least rotary fashion via a drive motor and via a driven shaft (10, 98, 100), which comprises a workholding fixture (14) for attaching tools (16, 104) actuatable in the direction of rotation of the driven shaft (10, 98, 100), and comprising a locking device (18, 86, 90), via which the driven shaft (10, 98, 100) is coupleable to and from a housing part (20, 106) in torsion-resistant fashion for locking and releasing the workholding fixture (14), and which opens automatically when torque is transferred from the drive motor to the toolholder (12, 102), and which locks automatically when torque is transferred from the toolholder (12, 102) to the drive-motor,

• wherein the locking device (18, 86, 90) comprises a washer (42) with at least one driving element (32, 34) for transmitting torque to at least one claw (24, 26, 28, 30, 142, 144, 146, 148, 158, 160, 162, 164) of one of a driven pulley (142, 156) or a toothed gear (22),
• wherein the driving elements (32, 34) are shaped in such a way to be rotatable with limitation between adjacent claws (24, 26, 28, 30, 142, 144, 146, 148, 158, 160, 162, 164),
• wherein the washer (42) has a nearly cylindrical basic shape on its outer circumference abutting the drive elements (32, 34), which transitions into a flat spot (74, 76) each in the center between the adjacent driving elements (32, 34),
• wherein the washer (42) is surrounded by a locking ring (48, 86, 94), and
• wherein in the regions of the flat spots (74, 76) of the washer (42) cylindrical rolling elements (42, 46) are accommodated between the washer (42) and the locking ring (48, 86, 94).

A power tool comprising a toolholder (12, 102) driveable in at least rotary fashion via drive motor and via a driven shaft (10, 98, 100), which comprises a workholding fixture (14) for attaching tools (16, 104) actuatable in the direction of rotation of the driven shaft (10, 98, 100), and comprising a locking device (18, 86, 90), via which the driven shaft (10, 98, 100) is coupleable to and from a housing part (20, 106) in torsion-resistant fashion for locking and releasing the workholding fixture (14), and which opens automatically when torque is transferred fro the drive motor to the toolholder (12, 102), and which locks automatically when torque is transferred from the toolholder (12, 102) to the drive-motor, wherein the locking device (18, 86,90) is located on the driven shaft (10, 98, 100),

• wherein the locking device (18, 36, 90) comprises a washer (42) with at least one driving element (32, 34) for transmitting torque to at least one claw (24, 26, 28, 30, 142, 144, 146, 148, 158, 160, 162, 164) of one of a driven pulley (142, 156) or a toothed gear (22),
• wherein the driving element (32, 34) is shaped in such a way to be rotatable with limitation between adjacent claws (24, 26, 28, 30, 142, 144, 146, 148, 158, 160, 162,164)
• wherein the washer (42) is located on a first bearing seat (36) of the driving shaft (10, 100) in torsion-resistant fashion, and the toothed gear (22, 110) is located on a second bearing seat (38) of the driven shaft (10, 100) in a rotatable fashion,
• wherein the washer (42) is surrounded by a locking ring (48, 86, 94 and
• wherein in the region of flat spots (74, 76) of the washer (42) cylindrical rolling elements (44, 46) are accommodated between the washer (42) and the locking ring (48, 86, 94).

A power tool comprising a toolholder (12, 102) driveable in at least rotary fashion via a drive motor and via a driven shaft (10, 98, 100), which comprises a workholding fixture (14) for attaching tools (16, 104) actuatable in the direction of rotating of the driven shaft (10, 98, 100), and comprising a locking device (18, 86, 90), via which the driven shaft (10, 98, 1000 is coupleable to and from housing part (20, 106) in torsionresistant fashion for locking and releasing the workholding fixture (14), and which opens automatically when torque is transferred from the drive motor to the toolholder (12, 102), and which locks automatically when torque is transferred from the toolholder (12, 102) to the drive-motor, wherein the locking device (18, 86, 90) is located on the driven shaft, (10, 98, 100),

• wherein the locking device (18, 90) comprises a washer (42) that comprises at least one driving element (32, 34) for transferring torque, wherein the washer (42) is located on a first bearing seat (36) of the driven shaft (10, 100) in torsion-resistant fashion, and a toothed gear (22, 110) is located on a second bearing seat (38) of the driven shaft (10,100), in rotatable fashion,
• wherein, in an arresting position of the locking device (18), the driven shaft (10) is supported in a component (50) in the direction of rotating via the washer (42) and via at least one body (44, 48, 48), via which component (50), moreover, bearing forces of the driven shaft (10) are supported in the housing part (20).

A power tool comprising a toolholder (12, 102) driveable in at least rotary fashion via a drive motor and via a driven shaft (10, 98, 100), which comprises a workholding fixture (14) for attaching tools (16, 104) actuatable in the direction of rotation of the driven shaft (10, 98, 100), and comprising a locking device (18, 86, 90), via which the driven shaft (10, 98, 100) is coupleable to and from a housing part (20, 106) in torsion resistant fashion for locking and releasing the workholding fixture (14), and which opens automatically when torque is transferred from the drive motor to the toolholder (12, 102), and which locks automatically when torque is transferred from the toolholder (12, 102), to the drive-motor, wherein the locking device (18, 90) comprising a washer (42) that comprises at least one driving element (32, 34) for transferring torque, wherein the washer (42) is located on a first bearing seat (36) of the driven shaft (10, 100) in torsion-resistant fashion, and the toothed gear (22, 110) is located on a second bearing seat (38) of the driven shaft (10, 100 in rotatable fashion,

• wherein, in an arresting position of the locking device (18), the driven shaft (10) is supported in a component (50) in the direction of rotation via the washer (42) and via at least one body (44, 46, 48), via which component (50), moreover, bearing forces of the driven shaft (10) are supported in the housing part (20), and
• wherein the bearing forces in the component (50) are supported via a pot-shaped component (52) designed separately from the component (50).

A power tool, comprising a toolholder (12, 102) driveable in at least rotary fashion via a drive motor and via a driven shaft (10, 98, 100), which comprises a workholding fixture (14) for attaching tools (16, 104) actuatable in the direction of rotation of the driven shaft (10, 98, 100), and comprising a locking device (18, 86, 90), via which the driven shaft (10, 98, 100) is coupleable to and from a housing part (20, 106) in torsion-resistant fashion for locking and releasing the workholding fixture (14), and which opens automatically when torque is transferred from the drive motor to the toolholder (12, 102), and which locks automatically when torque is transferred from the toolholder (12, 102) to the drive-motor,

• wherein the locking device (18, 86, 90) is locked on the driven shaft (10, 98, 100),
• wherein the locking device (18, 90) is developed as claw clutch that comprises a pulling element (22, 142, 156) with at least one claw (24, 26, 28, 30),
• said locking device (18, 86, 90) comprising a washer (42) located on a bearing seat (36) of the driven shaft (10, 98, 100) in torsion-resistant fashion, said driven shaft (10, 100) having a cross-section deviating from a cylindrical shape in the region of hearing seat (36) of the driven shaft (10, 98, 100) to form a geometrical positive connection with the washer (42),
• said washer (42) comprising at least one driving element (32, 34) for transmitting torque to said claw, the driving element having a rounded surface for engagement with said claw,
• wherein the driving element (32, 34) is shaped in such a way to be rotatable with limitation between adjacent claws,
• wherein the washer (42) having regions of flat spots (74, 76), in which cylindrical rolling elements (44, 46) are accommodated between the washer (42) and a locking ring (48, 86, 94), said locking ring (48, 86, 94) surrounding said washer,
• wherein, in an arresting position of the locking device (18), the driven shaft (10) is supported in a component (50) in the direction of rotation via the washer (42) and via at least one body (44, 46, 48), via which component (50), moreover, bearing forces of the driven shaft (10) are supported in the housing part (20).

A power tool, comprising a tool holder (12, 102) driveable in at least rotary fashion via a drive motor and via a driven shaft (10, 98, 100), which comprises a workholding fixture (14) for attaching tools (16, 104) actuatable in the direction of rotation of the driven shaft (10, 98, 100), and comprising a locking device (18, 88, 90), via which the driven shaft (10, 98, 100) is coupleable to and from a housing part (20, 108) in torsion-resistant fashion for locking and releasing the workholding fixture (14), and which opens automatically when torque is transferred from the drive motor to the toolholder (12, 102), and which locks automatically when torque is transferred from the toolholder (12, 102) to the drive-motor,

• wherein the locking device (18, 86, 90) is located on said driven shaft (10, 98, 100),
• wherein one part of the locking device (18, 86, 90) is formed by a toothed gear (22, 108, 110) rotatable relative to the driven shaft (10, 98, 100), the toothed gear comprising at least one claw (24, 26, 28, 30) secured in the toothed gear (22, 110),
• wherein the locking device (18, 86, 90) comprises a washer (42) with at least one driving element (32, 34) for transmitting torque to a toothed gear (22),
• said washer (42) being located on a bearing seat (36) of the driven shaft (10, 100) in torsion-resistant fashion, said driven shaft (10, 100) having a cross-section deviating from a cylindrical shape in the region of said bearing seat (36) of the driven shaft (10, 98, 100) to form a geometrical positive connection with the washer (42),
• said washer (42) having regions of flat spots (74, 76), wherein in the regions of the flat spots (74, 76) of the washer (42) cylindrical rolling elements (44, 46) are accommodated between the washer (42) and a locking ring (48, 86, 94), said locking ring (48, 86, 94) surrounding the washer,
• wherein, in an arresting position of the locking device (18), the driven shaft (10) is supported in a component (50) in the direction of rotation via the washer (42) and via said cylindrical rolling elements (44, 46) via which component (50), moreover, bearing forces of the driven shaft (10) are supported in the housing part (20).

A power tool comprising a toolholder (12, 102) driveable in at least rotary fashion via a driven shaft (10, 98, 100), which comprises a workholding fixture (14) for attaching tools (16, 104) actuatable in the direction of rotation of the driven shaft (10, 98, 100), and comprising a locking device (18, 86, 90), via which the driven shaft (10, 98, 100) is coupleable to and from a housing part (20, 106) in torsion-resistant fashion for locking and releasing the working fixture (14), and which opens automatically when torque is transferred from the drive motor to the toolholder (12, 102) and locks automatically when torque is transferred from the toolholder to the drive motor,

• wherein the locking device (18, 86, 90) is located on the driven shaft (10, 98, 100),
• wherein the locking device (18, 86, 90) comprises a locking ring (48, 86, 94) surrounding the driven shaft (10, 98, 100) and a washer (42), said washer (42) being located on a bearing seat (36) of the driven shaft (10, 98, 100) in torsion-resistant fashion, said driven shaft (10, 98, 100) having a cross-section deviating from a cylindrical shape in the region of said bearing seat (36) of the driven shaft (10, 98, 100) to form a geometrical positive connection with the washer (42),
• wherein upon torque is transferred from the tool holder (12, 102) to the drive motor rolling elements (44, 46) of the locking device (18, 86, 90) are automatically radially cramped between the washer (42) d the locking ring (48, 86, 94) for non-rotatably coupling the driven shaft (10, 98, 100) to the housing part,
• wherein upon torque is transferred from the drive motor to the tool holder (12, 102) said rolling elements (44, 46) are automatically released for allowing a rotation of the driven shaft (10, 98, 100) relative to the housing part.