Positioner for rotary tool
AssigneeForschungsinstitut fur Holztechnologie
InventorsJohannes Troger, Gernot Lauter, Heinrich Sporl
Life of this patent
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Abstract
A rotary tool is rotationally coupled to but axially slidable along a shaft that is driven by a motor. This tool is biased axially in one direction by a compression spring on the shaft and in the opposite direction engages via a thrust bearing on a force-transmission member. A spindle threaded in the machine housing engages this force-transmission member via a ball centered on the axis so that when the spindle is screwed relative to the housing it can axially displace this force-transmission member against the force of the spring to position it.
Claims6
In an apparatus having a tool carried on an end of a tool shaft having and rotatable about a shaft axis relative to a support, the improvement comprising:
- mounting means including at least one axially extending formation between said shaft and said tool for rotationally coupling said shaft and said tool and for axial displacement of said tool along said shaft;
- a compression spring surrounding said shaft and braced axially between said tool and said shaft for rotating with said shaft and tool and for urging said tool axially in one direction along said shaft;
- and
- positioning means between said support and said tool having a threaded spindle extending on said axis toward said shaft and threadedly engaging said support, a force-transmitting element lying on said axis and having one side bearing axially in said one direction on said spindle and another side, and an axial-thrust bearing having one axial end bearing axially in said one direction on said force-transmitting element and another axial end bearing axially in the opposite direction on said tool against the force of said spring.
Dependencies are inferred from the claim text.