Electromagnetic actuating device and camshaft adjuster with an electromagnetic actuating device

Patent metadata

Field	Value
Publication number	US-12537124-B2
Application number	US-202118024787-A
Country	US
Kind code	B2
Filing date	Aug 11, 2021
Priority date	Sep 8, 2020
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

The disclosure relates to an electromagnetic actuating device for a hydraulic camshaft adjuster. The electronic actuating device includes a housing, a yoke, a pole core, an armature, and an actuating pin and a bearing unit. The actuating pin is led out of the housing by means of the bearing unit, and the bearing unit forms a press-fit connection with the housing or with a component connected to the housing. To improve the connection, the bearing unit, the housing and/or the component connected to the housing have a recess that increases the elasticity of the press-fit connection.

First claim

The invention claimed is:

1 . An electromagnetic actuating device for a hydraulic camshaft adjuster, comprising:
a housing a yoke, a pole core, an armature, an actuating pin, and a bearing unit; the actuating pin is led out of the housing via the bearing unit, and; a first round surface of the bearing unit forms a press-fit connection with a second round surface of one of the housing or with a component connected to the housing, wherein a recess is arranged on the first round surface of the bearing unit so as to increase an elasticity of the press-fit connection, the recess extending radially inwardly from the first round surface.

2 . The electromagnetic actuating device according to claim 1 , wherein the recess is a reduction in sections of a diameter of the first round surface.

3 . The electromagnetic actuating device according to claim 1 , wherein a diameter of the first round surface remains constant.

4 . The electromagnetic actuating device of claim 1 , wherein the first round surface is an outer circumference of the bearing unit.

5 . An electromagnetic actuating device for a hydraulic camshaft adjuster, comprising:
a housing, a coil disposed within the housing, an armature disposed within the coil, a bearing unit disposed within an end of the housing via a press-fit connection, an actuating pin:
configured to be axially actuated by the armature,
disposed within and slidably guided by the bearing unit,
extending outside of the housing from the bearing unit,
wherein the press-fit connection:
is defined by a first round surface of the bearing unit and a second round surface of one of the housing or a separate component attached to the housing, and
the first round surface includes circumferentially arranged recesses that extend radially inwardly from the first round surface, the circumferentially arranged recesses configured to increase an elasticity of the press-fit connection.

6 . The electromagnetic actuating device of claim 5 , wherein the circumferentially arranged recesses are a reduction in sections of a diameter of the first round surface.

7 . The electromagnetic actuating device of claim 5 , further comprising a yoke and a pole core.

8 . The electromagnetic actuating device of claim 5 , wherein the first round surface is an outer circumference of the bearing unit.

Assignees

• Schaeffler Technologies Ag

Inventors

• Bai Ye

Classifications

• H01F2007/163

  with axial bearing · CPC title

• H01F2007/085

  Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material · CPC title

• F01L2013/0052

  with cams provided on an axially slidable sleeve · CPC title

• F16C17/02

  for radial load only · CPC title

• H01F7/081 Primary

  Magnetic constructions · CPC title