Camshaft adjusting device

• US 9,689,284 B2
• Filed: 02/11/2014
• Issued: 06/27/2017
• Est. Priority Date: 04/24/2013
• Status: Active Grant

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Putz, Boris, Bayrakdar, Ali
• Primary Examiner(s): Chang, Ching
• Application Number:
  US14/779,457
• Publication Number:
  US 20160069224A1
• Time in Patent Office: 1,232 Days
• Field of Search: 123 9015, 123 9017
• CPC Class Codes: F01L 1/047 Camshafts
• CPC Class Codes: F01L 1/344 changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
• CPC Class Codes: F01L 1/3442 using hydraulic chambers with variable volume to transmit the rotating force
• CPC Class Codes: F01L 2001/0476 Camshaft bearings
• CPC Class Codes: F16C 19/16 with a single row of balls
• CPC Class Codes: F16C 2360/18 Camshafts in general F01L
• CPC Class Codes: F16C 35/063 Fixing them on the shaft with interposition of an element F16C35/07
• CPC Class Codes: F16C 35/077 between housing and outer race ring

Abstract

A camshaft adjusting device, including a camshaft (1) and a camshaft adjuster (2) having a stator (5) that can be connected to a crankshaft of an internal combustion engine and a rotor (4) that is rotatably mounted in the stator (5) and can be connected to the camshaft (1) and a clamping device (3) for clamping the rotor (4) to the camshaft and a rolling bearing (8) absorbing both axial and radial forces for mounting the camshaft adjusting device in a stationary housing (11), wherein the rotor (4) is clamped to the camshaft (1) by the clamping device (3) via an inner ring (12) or an outer ring (13) of the rolling bearing (6).

Claims

1. A camshaft adjusting device comprising:

a camshaft,

a camshaft adjuster including,

a stator that is connectable to a crankshaft of an internal combustion engine, and

a rotor that is rotatably supported in the stator and is connected to the camshaft, and

a tensioning device for clamping the rotor to the camshaft, and

a rolling bearing that receives both axial and also radial forces for supporting the camshaft adjusting device in a stationary housing, wherein

the rotor is clamped on the camshaft by the tensioning device via an inner ring or an outer ring of the rolling bearing.

2. The camshaft adjusting device according to claim 1, wherein

the one of the inner ring or the outer ring, by which the rotor is clamped, is axially longer than the other of the inner ring or the outer ring, which is held fixed on the housing.

3. The camshaft adjusting device according to claim 1, wherein

the rotor has at least one axial projection with which the rotor connects to the inner ring or the outer ring.

4. The camshaft adjusting device according to claim 1, wherein

the rolling bearing is a ball bearing.

5. The camshaft adjusting device according to claim 1, wherein

the tensioning device is formed by a central screw.

6. The camshaft adjusting device according to claim 5, wherein

a rotationally locked threaded insert is provided on the camshaft, and the central screw is screwed into said threaded insert and a bearing seat for placement of the rolling bearing is provided on said threaded insert.

7. The camshaft adjusting device according to claim 6, wherein

the bearing seat is arranged on a ring projection of the threaded insert pointed in a direction of the rotor and the ring projection is dimensioned in axial length such that a gap is provided between an end side of the ring projection and the rotor.