Pivot cradle bearing and method for producing a synchronization device of a pivot cradle bearing

Patent metadata

Field	Value
Publication number	US-12071981-B2
Application number	US-202017636393-A
Country	US
Kind code	B2
Filing date	Jul 27, 2020
Priority date	Aug 21, 2019
Publication date	Aug 27, 2024
Grant date	Aug 27, 2024

Abstract

A pivot cradle bearing ( 1 ) for an axial piston machine, including a bent cage segment ( 2 ), in which rolling bodies are guided, which are arranged between two bearing parts which can be pivoted with respect to one another, wherein a synchronization device ( 4 ), which is designed for synchronizing the relative movement of the bearing parts with the displacement of the cage segment ( 2 ), includes a pivoting lever ( 5 ) which is mounted in the cage segment ( 2 ). An articulated bearing ( 6 ) is provided for mounting the pivoting lever ( 5 ) in the cage segment ( 2 ), the articulated bearing having an asymmetrical design with respect to a tangential plane (TE) lying centrally between an inner circumferential surface and an outer circumferential surface of the cage segment ( 2 ).

First claim

The invention claimed is:

1. A pivot cradle bearing, comprising:
two bearing parts which are pivotable with respect to one another;
a bent cage segment, in which rolling bodies are guided, which roll between the two bearing parts which are pivotable with respect to one another;
a synchronization device configured to synchronize a relative movement of the bearing parts with a displacement of the cage segment comprises a pivoting lever mounted in the cage segment;
an articulated bearing configured for mounting the pivoting lever in the cage segment, said articulated bearing being asymmetrical with respect to a tangential plane lying centrally between an inner circumferential surface and an outer circumferential surface of the cage segment, and said articulated bearing including a cylindrical portion and a tapering portion adjoining the cylindrical portion, the cylindrical portion conforming to at least a portion of the pivoting lever;
an inner sliding bearing piece formed by the pivoting lever that is symmetrical, and an outer sliding bearing piece formed by the cage segment which is asymmetrical; and
an annular recess surrounding the articulated bearing formed on an outer circumferential surface of the cage segment and is arranged outside an annular securing collar which is formed directly by the cage segment and, together with a spherical sliding bearing surface provided by the cage segment, captively holds the pivoting lever in the cage segment.

2. The pivot cradle bearing according to claim 1 , wherein the outer sliding bearing piece is formed in one piece directly by the cage segment.

3. The pivot cradle bearing according to claim 1 , wherein the cage segment is made of plastic.

4. The pivot cradle bearing according to claim 1 , wherein the inner sliding bearing piece of the pivoting lever includes a diameter equal to the diameter of the cylindrical portion of the articulated bearing.

5. The pivot cradle bearing according to claim 4 , wherein the inner sliding bearing piece is a joint ball.

6. A method for producing a synchronization device of a pivot cradle bearing, the method comprising:
providing a cage segment blank in which a through-opening with a cylindrical portion and a tapering portion adjoining the cylindrical portion is arranged,
providing a pivoting lever which has a spherical portion as an inner sliding bearing piece spaced from the ends thereof,
inserting the pivoting lever into the through-opening of the cage segment blank, such that the spherical portion comes to rest on the tapering portion of the through-opening, and
narrowing of the cylindrical portion of the through-opening, by heating and deforming the cage segment blank, by which the pivoting lever is secured against being pulled out of the through-opening.

7. The method according to claim 6 , wherein the cage segment blank is deformed by placing a punch with an annular machining edge on an outer circumferential surface of the cage segment blank.

8. The method according to claim 6 , wherein the cylindrical portion includes a diameter equal to the spherical portion of the pivoting lever.

9. A pivot cradle bearing, comprising:
two bearing parts which are pivotable with respect to one another;
a bent cage segment, in which rolling bodies are guided, which roll between the two bearing parts which are movable relative to one another;
a synchronization device configured to synchronize a relative movement of the bearing parts with a displacement of the cage segment, the synchronization device comprising a pivoting lever mounted in the cage segment;
an articulated bearing configured for mounting the pivoting lever in the cage segment, said articulated bearing being asymmetrical with respect to a tangential plane lying centrally between an inner circumferential surface and an outer circumferential surface of the cage segment; and
a retainer that holds a portion of the pivoting lever in the cage segment, the retainer comprises a deformation formed in the cage segment.

10. The pivot cradle bearing according to claim 9 , further comprising an inner sliding bearing piece formed by the pivoting lever that is symmetrical, and an outer sliding bearing piece formed by the cage segment which is asymmetrical.

11. The pivot cradle bearing according to claim 9 , further comprising an annular recess surrounding the articulated bearing formed on an outer circumferential surface of the cage segment, an annular securing collar formed directly by the cage segment that forms the retainer and, together with a spherical sliding bearing surface provided by the cage segment, captively holds the pivoting lever in the cage segment.

12. The pivot cradle bearing according to claim 11 , wherein the outer sliding bearing piece is formed in one piece directly by the cage segment.

13. The pivot cradle bearing according to claim 9 , wherein the cage segment is made of plastic.

Assignees

• Schaeffler Technologies Ag

Inventors

• Kramar Vasyl

Classifications

• F16C33/4605

  Details of interaction of cage and race, e.g. retention or centring · CPC title

• F16C2360/42

  Pumps with cylinders or pistons · CPC title

• F16C33/4635

  made from plastic, e.g. injection moulded window cages · CPC title

• F16C19/502 Primary

  with rolling elements in rows not forming a full circle · CPC title

• F03C1/0671

  Swash or actuated plate bearing means or driven axis bearing means · CPC title