US 11,495,380 B2 · Bistable hoisting solenoid

Abstract

A bistable hoisting solenoid comprising first and second stroke end position and a stroke center position, comprising: a stator, one or more armatures, at least one coil, at least one permanent magnet and a spring system having a first spring which, in the first stroke end position, exerts a force in the direction of the stroke center position on the one or more armatures, and a second spring which, in the second stroke end position, exerts a force in the direction of the stroke center position on the one or more armatures. The one or more armatures, in the event of a loss of current, are held by permanent magnets in both stroke end positions. The first and the second springs have different paths with different lengths and/or exert in the respective stroke end position different sized forces on the one or more armatures and/or have different sized spring rates.

Claims20

Dependent claims

A bistable lifting solenoid that has a first end of stroke position and a second end of stroke position and a center of stroke position disposed between the end of stroke positions, comprising:

a stator;
one or more armatures;
at least one coil;
at least one permanent magnet;
and
a spring system having a first spring that exerts a force on the armature or armatures in a direction toward the center of stroke position in the first end of stroke position and having a second spring that exerts a force on the armature or armatures in a direction toward the center of stroke position in the second end of stroke position, wherein the armature or armatures are held in a permanent magnetic manner against the spring force in both end of stroke positions in a currentless case, wherein
the first and second springs have spring travels of different lengths and/or exert forces of different strengths on the armature or armatures and/or have spring rates of different amounts in the respective end of stroke position.

4 more elements

A bistable lifting solenoid, that has a first end of stroke position and a second end of stroke position and a center of stroke position disposed between the end of stroke positions, comprising:

a stator;
one or more armatures;
at least one coil;
and at least one permanent magnet, with the armature or armatures being held in a permanent magnetic manner against a spring force in both end of stroke positions in the currentless case;
wherein the stator has a soft magnetic sleeve and first and second soft magnetic front sections that form a housing in which the armature is displaceably arranged;
wherein at least one first working air gap is provided between the armature and the first front section and at least one second working air gap is provided between the armature and the second front section;
wherein at least one permanent magnet and at least one first coil and one second coil are arranged at the stator;
wherein the armature forms a first magnetic part circuit with the sleeve and the first front section in the first end of stroke position, said first magnetic part circuit at least surrounding the first coil, while the working air gap or gaps is/are opened to a maximum with the second front section;
and wherein the armature forms a second magnetic part circuit with the sleeve and the second front section in the second end of stroke position, said second magnetic part circuit at least surrounding the second coil, while the working air gap or gaps is/are opened to a maximum with the first front section, wherein
at least one first permanent magnet and one second permanent magnet are provided, with the first and second coils being arranged in an axial direction between the first and second permanent magnets,
with the first permanent magnet putting the sleeve and the first front section under a magnetic voltage and the second permanent magnet putting the sleeve and the second front section under a magnetic voltage.

8 more elements

Dependencies are inferred from the claim text.

Bistable hoisting solenoid

Life of this patent

Bistable hoisting solenoid

Life of this patent

Abstract

Claims20