Camshaft adjuster having two ball joints

Patent metadata

Field	Value
Publication number	US-2017254232-A1
Application number	US-201515507066-A
Country	US
Kind code	A1
Filing date	Jun 18, 2015
Priority date	Aug 28, 2014
Publication date	Sep 7, 2017
Grant date	—

Abstract

A camshaft adjuster ( 1 ) for variably adjusting an outer camshaft ( 5 ) and an inner camshaft ( 7 ) that is arranged concentrically thereto, including a stator ( 2 ) that can be connected to the outer camshaft ( 5 ), and a rotor ( 3 ) that is arranged concentrically to the stator ( 2 ), wherein the rotor ( 3 ) can be connected to the inner camshaft ( 7 ) in the manner of a first joint ( 9 ) on a first spherical contact surface ( 27 ). In order to axially secure the rotor ( 3 ) on the inner camshaft ( 7 ), force can be applied to the rotor ( 3 ) by way of a screw ( 4 ). The screw ( 4 ) can be connected to the inner camshaft ( 7 ) in the manner of a second joint ( 12 ) on a second spherical contact surface ( 28 ). A camshaft adjuster-camshaft combination having a camshaft adjuster, wherein the outer camshaft ( 5 ) is fixed on the stator ( 2 ) in a rotationally secured manner, and the inner camshaft ( 7 ) is fixed on the rotor ( 3 ) in a rotationally secured manner.

First claim

1 - 10 . (canceled)

11 . A camshaft adjuster for variably adjusting an outer camshaft and an inner camshaft situated concentrically thereto, the camshaft adjuster comprising:
a stator connectable to the outer camshaft; a rotor situated concentrically to the stator, the rotor being connectable to the inner camshaft in the manner of a first joint on a first spherical contact surface, and force being applicable to the rotor via a screw for the purpose of axially securing the rotor on the inner camshaft, the screw connectable to the inner camshaft in the manner of a second joint on a second spherical contact surface.

12 . The camshaft adjuster as recited in claim 11 wherein the first joint or the second joint is formed from a pair of spherically diametrically opposed joint contours.

13 . The camshaft adjuster as recited in claim 11 wherein the first joint is formed by a convex joint contour on the camshaft side and a concave joint contour on the rotor side or by a concave joint contour on the camshaft side and a convex joint contour on the rotor side.

14 . The camshaft adjuster as recited in claim 11 wherein the second joint is formed by a convex joint contour on the screw side and a concave joint contour on the rotor side or by a concave joint contour on the screw side and a convex joint contour on the rotor side.

15 . The camshaft adjuster as recited inclaim 11 wherein the rotor is in direct contact with the inner camshaft in the first joint, or a first compensating part is inserted between the rotor and the inner camshaft.

16 . The camshaft adjuster as recited in claim 15 wherein the first compensating part has a convex or concave contour on one or two surfaces.

17 . The camshaft adjuster as recited in claim 11 wherein the screw is in direct contact with the inner camshaft in the second joint, or a second compensating part is inserted therebetween.

18 . The camshaft adjuster as recited in claim 17 wherein the compensating part is present and has a convex or concave contour on one or two surfaces.

19 . The camshaft adjuster as recited in claim 11 wherein a toothing is present on the inner camshaft, a diametrically opposed toothing being formed on the rotor, and the teeth being formed to permit a wobbling movement of the rotor relative to the inner camshaft around the first joint.

20 . A camshaft adjuster-camshaft combination, comprising: a camshaft adjuster as recited in claim 11 , the outer camshaft rotatably fixedly attached to the stator, and the inner camshaft rotatably fixedly attached to the rotor.

Assignees

• Schaeffler Technologies Ag

Inventors

• Stays Rafael

Classifications

• F01L1/344 Primary

  changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear · CPC title

• F01L2001/34433

  Location oil control valves · CPC title

• F01L1/3442

  using hydraulic chambers with variable volume to transmit the rotating force · CPC title

• F01L2001/0473

  Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod · CPC title

• F01L1/047 Primary

  Camshafts · CPC title