Bearing unit with three bearings including a preload bearing, in particular for a paper processing tool
AssigneeBobst Mex SA
InventorsOskar Dittli, Pierre Robadey
Life of this patent
Estimating the term…
Abstract
A very compact play-free bearing unit includes a bearing that runs without play while having a reasonably large play when assembling and during disassembly of the bearing unit from its axle. The bearing unit uses three bearings, one of which is mobile, and thanks to a preloading mechanism the play is removed when loaded. Thanks to an amplification lever, the preloading unit is able to function either with a pneumatic actuator or with a hydraulic actuator.
Claims19
A bearing unit for a rotary processing tool, the bearing unit comprising:
- two outer bearings;
- an intermediate bearing;
- and
- a preloading unit adapted for displacing the intermediate bearing with respect to the two outer bearings,
- wherein the intermediate bearing is accommodated in a slider which is received within a recess in a main body of the bearing unit, the slider extending from the recess to an exterior of the main body,
- wherein the preloading unit comprises an amplification lever configured to amplify an actuation force created by an actuator into a greater preloading force acting on the slider and the intermediate bearing, and
- wherein a movement of the amplification lever in a first direction provides a movement of the intermediate bearing in a second direction substantially the same as the first direction.
A bearing unit for a rotary processing tool, the bearing unit comprising:
- two outer bearings;
- an intermediate bearing accommodated in a slider which is received within a recess in a main body of the bearing unit;
- and
- a preloading unit adapted for displacing the intermediate bearing with respect to the two outer bearings,
- wherein the preloading unit comprises an amplification lever configured to amplify an actuation force created by an actuator into a greater preloading force acting on the slider and the intermediate bearing, and
- wherein the actuator comprises a piston/cylinder arrangement in which the piston is held stationary with respect to the bearing unit.
A bearing unit for a rotary processing tool, the bearing unit comprising:
- a main body including a recess;
- a first bearing provided in the main body;
- a slider movably provided in the recess;
- a second bearing accommodated in the slider;
- and
- a preloading unit adapted to displace the slider, and therefore the second bearing, with respect to the first bearing,
- wherein the preloading unit includes
- an amplification lever,
- a cylinder provided in the amplification lever, and
- a piston provided in the cylinder to provide an actuation force to the amplification lever to displace the slider.
Dependencies are inferred from the claim text.