US 4,572,442 AGranted

Bowl-type grinding apparatus

AssigneeMaag Gear-Wheel & Machine Company Limited

InventorHans Sigg

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Abstract

Two grinding rolls are mounted at a roll carrier. Below the roll carrier a grinding bowl is rotatably mounted on an axial thrust bearing for rotation about a substantially vertical axis. Below the axial thrust bearing there is arranged a drive device for the grinding bowl. A speed reduction gear arrangement is disposed between the drive device and the grinding bowl and contains a substantially cylindrical housing. This housing supports the axial thrust bearing and itself is supported by a substantially ring-shaped flange at a stand or framework at which there is also supported the roll carrier. The flange is connected to the roll carrier by means of a plurality of, for instance, four tie rods. Thus, the forces exerted by the grinding rolls on the grinding bowl and which are transferred therefrom to the housing and the reaction forces associated therewith are transmitted over a relatively short path via the flange to the roll carrier without loading any members of the drive device which are arranged below the flange.

Claims9

Dependent claims

A bowl-type grinding apparatus comprising:

a roll carrier;
at least two milling rolls journalled in said roll carrier;
a milling platen arranged below said roll carrier and including a grinding bowl and an axial thrust bearing defining a substantially vertical axis;
said axial thrust bearing supporting said milling platen;
drive means including speed reduction gearing;
said drive means and said speed reduction gearing thereof being conjointly mounted below said axial thrust bearing;
a flange;
a framework supporting said flange;
said milling platen bearing upon said framework through said flange;
said speed reduction gearing being arranged within said milling platen;
a housing for said speed reduction gearing;
said axial thrust bearing having a predetermined region for transmitting axial force;
said housing being arranged substantially in line with said predetermined region and connected to said flange of said milling platen such that axial forces generated by said at least two milling rolls and transmitted through said milling platen, said axial thrust bearing and said housing follow a substantially straight line;
at least two tie rods interconnecting said flange and said roll carrier for conducting said forces back to said roll carrier and ultimately said framework;
and
said roll carrier being supported on said framework.

13 more elements

Dependencies are inferred from the claim text.