An electromagnetic relay, in particular a motor vehicle relay, contains a magnet yoke, a relay coil, a hinged armature which is pivotable about an axis of rotation and on which a moving contact, as working or switchover contact, is retained relative to at least one fixed contact. A piezo actuator is
An electromagnetic relay, in particular a motor vehicle relay, contains a magnet yoke, a relay coil, a hinged armature which is pivotable about an axis of rotation and on which a moving contact, as working or switchover contact, is retained relative to at least one fixed contact. A piezo actuator is provided, which keeps the working or switchover contact closed when the relay coil is de-energized as a result of the actuation of the piezo actuator.
대표청구항▼
1. An electromagnetic relay, comprising: a magnet yoke having a clamping gap formed therein;a relay coil;a moving contact;a first fixed contact;a hinged armature being pivotable about a rotation axis and on which said moving contact being held relative to at least said first fixed contact;a piezo ac
1. An electromagnetic relay, comprising: a magnet yoke having a clamping gap formed therein;a relay coil;a moving contact;a first fixed contact;a hinged armature being pivotable about a rotation axis and on which said moving contact being held relative to at least said first fixed contact;a piezo actuator which, as a result of being actuated, keeps said moving contact closed when said relay coil is de-energized;a tension element having a free side, said tension element being held on one side of said hinged armature, and being routed by way of said free side into said clamping gap and, as a result of said piezo actuator being actuated, is held in said clamping gap in a force-fitting manner; anda lever transmission device for converting a force stroke, which is generated by said piezo actuator as a result of being actuated, into a clamping stroke for fixing said tension element, which is held on a hinged armature side and/or on a moving contact side, in a releasable and clamped manner. 2. The electromagnetic relay according to claim 1, wherein said magnet yoke has a clamping lever which pivots about a rotation or rotation point, a lever arm which is acted on by said piezo actuator, and a clamping arm which is routed to said clamping gap. 3. The electromagnetic relay according to claim 2, wherein: said magnet yoke has a radial slot formed therein; andsaid clamping lever is produced by said radial slot in said magnet yoke, and said clamping lever is formed by a material web which represents said rotation point. 4. The electromagnetic relay according to claim 2, wherein said clamping arm is longer than said lever arm. 5. The electromagnetic relay according to claim 2, wherein said tension element is oriented axially, and said clamping gap is oriented radially, in relation to said relay coil. 6. The electromagnetic relay according to claim 2, wherein said magnet yoke has a supporting limb which is spaced apart from said clamping lever and on which said piezo actuator, which operates said clamping lever as a result of being actuated, is supported. 7. The electromagnetic relay according to claim 6, wherein a distance between said clamping lever and said supporting limb is matched to an actuator height which runs in a stroke direction of said piezo actuator. 8. An electromagnetic relay, comprising: a relay coil;a moving contact;a first fixed contact;a hinged armature being pivotable about a rotation axis and on which said moving contact being held relative to at least said first fixed contact;an L-shaped magnet yoke containing, in relation to said relay coil, a radial pole limb and an axial functional limb to which said hinged armature is connected in an articulated manner by means of said rotation axis;a piezo actuator which, as a result of being actuated, keeps said moving contact closed when said relay coil is de-energized;said radial pole limb having a supporting limb and a clamping limb; andsaid axial functional limb having a U-shaped receiving pocket for said piezo actuator, wherein said U-shaped receiving pocket has U-limbs, which are parallel to one another, merge with said clamping limb and, respectively, with said supporting limb of said radial pole limb. 9. The electromagnetic relay according to claim 2, wherein: said clamping lever has a clamping cam;said magnet yoke has a bead-shaped clamping groove formed therein; andsaid clamping gap is formed between said clamping cam and said bead-shaped clamping groove, said clamping cam engaging in said bead-shaped clamping groove so as to secure said tension element against pivoting radially outward. 10. The electromagnetic relay according to claim 8, wherein said moving contact is a spring contact for generating a spring return force which acts on said hinged armature. 11. The electromagnetic relay according to claim 10, wherein said spring contact has a generally L-shaped spring element being bent in such a way to have offset spring limbs with one of said offset spring limbs fixed to said axial functional limb of said magnet yoke, and another of said offset spring limbs fixed to said hinged armature. 12. The electromagnetic relay according to claim 1, further comprising: a non-reactive resistor; anda second fixed contact connected to said non-reactive resistor, said non-reactive resistor connected in parallel with said piezo actuator, so as to form a switchover contact. 13. The electromagnetic relay according to claim 3, wherein said magnet yoke has a pole limb and said clamping lever is formed in said pole limb. 14. The electromagnetic relay according to claim 2, wherein said clamping arm is at least twice as long as said lever arm. 15. The electromagnetic relay according to claim 1, wherein the electromagnetic relay is a motor vehicle relay.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (10)
Babitzka, Rudolf; Beck, Walter, Electromagnetic positioning device with piezo-electric control.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.