ROLLER BEARING WITH A BRAKING DEVICE
A roller bearing ( 1 ) with a braking device, in particular, rotating connection, made from a bearing outer ring ( 2 ) and a bearing inner ring ( 3 ), between which there are provided roller bodies roll on associated raceways. For achieving a braking effect by a friction-fit connection, a movable brake element connected to one of the bearing rings ( 2, 3 ) is pressed against a counter surface of the other bearing ring ( 3, 2 ) and the force releasing the friction-fit connection can be applied by hydraulic medium. The friction-fit connection is generated according to the principles of the governing hydrostatic equation, wherein a brake lining ( 18 ) is surrounded by a hydraulic pressure medium ( 19 ) that is connected to a deflection space ( 21 ), which can be added on and in which a movable pressure piston ( 15 ) is arranged, wherein this piston can change the volume of this deflection space.
1 . Roller bearing with a braking device, comprising a bearing outer ring and a bearing inner ring, between which roller bodies roll on associated raceways, wherein, for achieving a braking effect by a friction-fit connection, a movable brake element is connected to one of the bearing rings and is movable against a counter surface of the other bearing ring and a force releasing the friction-fit connection can be applied by hydraulic medium, the friction-fit connection is generated by hydrostatic action, wherein a brake lining is surrounded by a hydraulic pressure medium that is connected to a deflection space, which can be added on and in which a movable pressure piston is arranged, wherein the piston can change a volume of the deflection space.
2 . Roller bearing according to claim 1 , wherein the hydraulic pressure medium is received by a flexible and impermeable sleeve.
3 . Roller bearing according to claim 2 , wherein the sleeve is in active connection with an adjustment element at several points set apart from each other uniformly in a peripheral direction.
4 . Roller bearing according to claim 3 , wherein the pressure piston is connected to an activation piston, which can be moved electromagnetically or pneumatically.
5 . Roller bearing according to claim 4 , wherein the activation piston can be moved against a force of a spring element.
6 . Roller bearing according to claim 4 , wherein the activation piston is connected to an engaging fork having side walls that each receive a force from a spring element, wherein the engaging fork is connected to a trip lever, which is in active connection, in turn, with the pressure piston.
7 . Roller bearing according to claim 1 , wherein the roller bodies are formed by bearing needles of two axial inclined needle bearings that are inclined in opposite directions, and an intersection point of extended rotational axes of the needle bearings lies in the bearing inner ring or in the bearing outer ring.
8 . Roller bearing according to claim 7 , wherein the axial inclined needle bearings are set in an O-arrangement relative to each other and have washer disks forming raceways.
9 . Roller bearing according to claim 8 , wherein the washer disks are subjected to a hardening process.
10 . Roller bearing according to claim 9 , wherein the washer disks and at least one of the bearing rings are made from different materials.
11 . Roller bearing according to claim 7 , wherein one of the bearing rings has a two-part construction for adjusting bias, and the one of the bearing rings is connected to a lock nut adjustable in the axial direction.
12 . Roller bearing according to claim 11 , wherein the lock nut is held by a thread in a corresponding counter thread of the one of the bearing rings.
13 . Roller bearing according to claim 1 , wherein the bearing is in a ceiling stand for medical devices.