Manually driven machine

Handheld machine tool comprising:

• a housing;
• a disk-shaped tool;
• driving means for driving said tool for rotation, said driving means including a tool shaft carrying said tool;
• means for clamping said tool in said housing and including two supporting flanges supporting said tool therebetween, a clamping screw at an end of said tool shaft, and an internal threaded portion engaged with said clamping screw to secure one of said supporting flanges relative to said tool shaft, another of said supporting flanges being mounted on said tool shaft for easy rotation thereon and being supported with an extensive friction at one side of said tool;
• and adjusting means coupled with said another supporting flange and displacing said another supporting flange along an axis of said tool shaft towards said tool when said another supporting flange is rotated relative to said tool shaft due to rotation of said tool by said driving means during operation of the handheld machine tool, and said adjusting means clamping said tool with a decreasing force and urging said another supporting flange to automatically displace away from said tool along said axis when said tool is stopped and thereby reduce a clamping force, wherein said adjusting means comprises a pair of disks having axially inclined surfaces and which are supported against one another via said axially inclined surfaces, and a spring, said disks rotating relative to one another so as to be pretensioned by said spring to try to occupy a position with a minimum axial spacing between said disks and, when said disks are rotated relative to one another out of said position, said disks are displaced by a predetermined maximum axial distance, wherein one of said disks is rotatable and is coupled with said another supporting flange such that said one of said disks is driven along in rotation, and another of said disks is coupled with said tool shaft so as to be fixed with respect to rotation relative thereto.

Handheld machine tool comprising a housing;

• a disk-shaped tool;
• driving means for driving said tool for rotation, said driving means including a tool shaft carrying said tool;
• means for clamping said tool in said housing which include two supporting flanges supporting said tool there between, a clamping screw at an end of said tool shaft, and an internal-threaded portion engaged with said clamping screw to secure one of said supporting flanges relative to said tool shaft, another of said supporting flanges being mounted on said tool shaft for easy rotation thereon and being supported with an extensive friction at one side of said tool;
• and adjusting means coupled with said another supporting flange and displacing said another supporting flange along an axis of said tool shaft towards said tool when said another supporting flange is rotated relative to said tool shaft due to rotation of said tool by said driving means during operation of the handheld machine tool, and said adjusting means clamping said tool with a decreasing force and urging said another supporting flange to automatically displace away from said tool along said axis when said tool is stopped and thereby reduce a clamping force, said adjusting means comprising a pair of disks having axially inclined surfaces and which are supported against one another via said axially inclined surfaces, and a spring, said disk rotating relative to one another so as to pretensioned by said spring to try to occupy a position with a maximum axial spacing between said disks and, when said disks are rotated relative to one another out of said position, said disks are displaced by a predetermined maximum axial distance, and wherein one of said disks is rotatable and is coupled with said another supporting flange such that said one of said disks is driven along in rotation, and another of said disks is coupled with said tool shaft so as to be fixed with respect to rotation relative thereto.