Thread cutting tool
AssigneeREMS-WERK Christian F/o/ ll und S/o/ hne GmbH & Co.
InventorRudolf Wagner
Life of this patent
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Abstract
A thread cutting tool having an electric motor which is accommodated in a housing and, by means of at least one worm gearing, drives a holder ring which is rotatably mounted in a head ring. The electric motor has a speed of greater than 25,000 rpm. The worm-gear toothing of the holder ring has a modulus of less than approximately 1.6 mm. Due to the high speed, the electric motor can be very small, so that the thread cutting tool can be easily handled, and can have a low weight. Due to the low modulus, the high speed of the electric motor can be reduced to the operating speed of the holder ring without it being necessary that the worm gear have a large diameter.
Claims27
A thread cutting tool, which comprises:
- a housing;
- an electric motor which is positioned in said housing and has a speed of greater than approximately 25,000 rpm;
- a head ring which is connected to said housing;
- a holder ring which is rotatably mounted in said head ring, and which is provided with a worm-gear toothed configuration on its periphery having a modulus represented by the ratio of a spacing distance (t) divided by .pi., said spacing distance being defined as the distance between adjacent, similarly-directed sides of adjacent teeth of said worm gear toothed configuration and located along a partial circle defined as the sum of said spacing distances between said teeth, said partial circle lying on a circle having a circumference equalling the sum of said spacing distances times the number of said teeth (z), said modulus amounting to less than approximately 1.6 mm;
- and
- at least one worm gearing means operatively connected with said electric motor and with said holder ring for driving the latter, said worm gearing means including at least one worm gear, each of which meshes with said worm-gear toothed configuration of said holder ring.
Dependencies are inferred from the claim text.