Device for transmitting a torque from a drive device onto a roller in a roll stand

A device for transmitting a torque from a drive device to a roller in a roll stand for rolling a rolling stock, comprising:

• a spindle;
• a drive-side pivot bearing for rotatably coupling the spindle to a drive shaft of the drive device;
• a roller-side pivot bearing for rotatably coupling the spindle to a pin of the roller, whereby a lubricant chamber is formed in the roller-side pivot bearing;
• and
• at least one pump device is built in a circuit for liquid lubricant for supplying the liquid lubricant in the circuit;
• wherein in an area of the spindle is built a feed channel and a return channel for the lubricant, which are connected in a fluidically conductive manner to the lubricant chamber in the roller-side pivot bearing;
• wherein a lubricant chamber is built in the drive-side pivot bearing:,
• wherein the roller-side pivot bearing is provided with a roller-side sleeve, which is connected in a fixed manner with the pin to the roller-side pivot bearing, in which the roller-side end of the spindle is rotatably coupled to and engaged via its outer toothing by an inner toothing of the roller-side sleeve;
• wherein the lubricant chamber is sealed and delimited in the roller-side pivot bearing toward the pin of the roller by a separating wall radially extending through the interior of the roller-side sleeve, in the radial direction through the roller-side sleeve and sealed and delimited toward the drive side by a ring seal which is set on the spindle;
• and
• wherein the lubricant chambers in the roller-side and in the drive-side pivot bearing are mutually connected to each other, wherein the circuit for the lubricant is formed as a closed circuit.