Manually driven machine
First Claim
1. 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 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.
1 Assignment
0 Petitions
Accused Products
Abstract
A handheld machine tool, for example a circular saw, has a disk-shaped tool which is driven in rotation in a housing which holds a drive motor and a tool shaft carrying the tool. The tool can be clamped between a clamping nut, a clamping screw, and two supporting flanges. One supporting flange can be rotated easily relative to the tool shaft without use of auxiliary tools and is supported with an extensive friction at the tool. This supporting flange can be dependably clamped or loosened without tools. The machine tool further has an adjusting device which is coupled with that supporting flange to displace the latter axially toward the tool when that supporting shaft is rotated relative to the tool shaft due to rotational driving. The adjusting device therefore clamps the tool with an increasing force and tries to displace that supporting flange axially away from the tool automatically when the tool is stopped and accordingly reduces the clamping force.
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Citations
16 Claims
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1. 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 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. - View Dependent Claims (2, 3, 4, 12)
- a housing;
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5. 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. - View Dependent Claims (6, 7, 8, 9, 10)
- a housing;
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11. 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. - View Dependent Claims (13, 14, 15, 16)
- a disk-shaped tool;
Specification