Pivot Bearing

• US 20090154861A1
• Filed: 12/12/2008
• Published: 06/18/2009
• Est. Priority Date: 12/14/2007
• Status: Active Grant

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Winkler, Thomas, Peter, Alexander, Goerwitz, Thomas, Becker, Klaus, Georgi, Jan, Vornehm, Harald
• Granted Patent: US 8,376,615 B2
• Time in Patent Office: Days
• US Class Current: 384/569
• CPC Class Codes: F04B 1/2085 Bearings for swash plates or driving axles
• CPC Class Codes: F04B 1/324 by changing the inclination of the swash plate
• CPC Class Codes: F16C 19/502 with rolling elements in rows not forming a full circle
• CPC Class Codes: F16C 2360/00 Engines or pumps
• CPC Class Codes: F16C 33/306 Means to synchronise movements
• CPC Class Codes: F16C 33/4623 formed as one-piece cages, i.e. monoblock cages

Abstract

A pivot bearing having a first bearing surface of hollow cylindrical design, at least in sections. Guided in the first bearing surface is a second bearing surface of hollow cylindrical design, at least in sections. Rolling bodies are arranged between the bearing surfaces. The pivot bearing also has a cage for guiding the rolling bodies, and a slide block to prevent the cage from slipping. A first grove is formed in the first bearing surface and a second grove is formed in the second bearing surface. The groves are inclined transversely with respect to the running direction of the rolling bodies. the opposite inclination of the groves has the result that, if the spacing between bearing surfaces is neglected, the grooves intersect. The sliding block is guided between the grooves. The cage has a recess that holds the sliding block permitting cage control.

Claims

1. A pivot bearing, comprising:

a first bearing surface which is of hollow cylindrical design at least in sections;

a second bearing surface which is of hollow cylindrical design at least in sections, with the first bearing surface and the second bearing surface being pivotable with respect to one another;

rolling bodies between the first bearing surface and the second bearing surface, which the rolling bodies, in a running direction, follow a pivoting movement between the first bearing surface and the second bearing surface;

a cage for guiding the rolling bodies; and

means for cage control, the means serve to prevent slipping of the cage in a pivot bearing;

wherein a first groove is formed in the first bearing surface; and

a second groove is formed in the second bearing surface, with the first groove and the second groove being inclined transversely with respect to the running direction of the rolling bodies, and being aligned so as to intersect each other;

a sliding block which forms the means for cage control being guided between the first groove and the second groove; and

with the cage having a recess in which the sliding block for controlling the cage is held.

2. The pivot bearing according to claim 1, wherein an inclination of the first groove with respect to the running direction of the rolling bodies and the inclination of the second groove with respect to the running direction of the rolling bodies have, in each case, an angle of 30°

±

10°

.

3. The pivot bearing according to claim 1, wherein the first bearing surface has a plurality of first grooves and the second bearing surface has a plurality of second grooves, in each case, one of a plurality of sliding blocks being guided between the first grooves and the second grooves, which and the sliding blocks are held in the cage by one of the plurality of recesses.

4. The pivot bearing according to claim 3, wherein the cage has a shape of an arc in the end regions, of which is arranged, in each cases one of the recesses for one of the sliding blocks.

5. The pivot bearing according to claim 1, wherein the sliding block has guide elements which are in engagement with corresponding guide elements of the cage.

6. The pivot bearing according to claim 1, wherein the sliding block is formed by a ball.

7. The pivot bearing according to claim 1, wherein the recess in the cage is formed by a slot which is aligned transversely with respect to the rolling bodies direction of movement.

8. The pivot bearing according to claim 7, wherein the cage has a plurality of roller pockets for guiding the rolling bodies which are formed by rollers, with the slot for holding the sliding block being formed by one of the roller pockets.

9. The pivot bearing according to claim 8, wherein a diameter of the rolling bodies is approximately 1 mm smaller than the diameter of balls.

10. The pivot bearing according to claim 1, wherein the pivot bearing is formed as an integral part of a swashplate-type axial piston engine.