Pneumatic solenoid valve

Patent metadata

Field	Value
Publication number	US-10522278-B2
Application number	US-201615766214-A
Country	US
Kind code	B2
Filing date	Sep 21, 2016
Priority date	Oct 5, 2015
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

Disclosed is a pneumatic solenoid valve comprising an air chamber with multiple air connections which can be connected via multiple switching positions of the valve by interconnecting the air chamber. The valve comprises a magnetic coil, a yoke arranged on the coil, and an armature arranged about the yoke and able to move relative to the yoke, all within the air chamber. When the coil is energized, the magnetic force generated rotates the armature about a single axis of rotation against a restoring force, until the magnetic force corresponds to the restoring force. When the armature rotates, the size of at least one overlapping region between the yoke and the armature changes, wherein an air gap is formed between the yoke and the armature. The distance of the air gap between the yoke and the armature remains substantially constant in the direction of rotation of the armature.

First claim

The invention claimed is:

1. A pneumatic solenoid valve comprising:
an air chamber on which a plurality of air connectors which are switchable by way of a plurality of switching positions of the solenoid valve, with the interconnection of the air chamber, are provided, wherein the solenoid valve comprises a magnet coil, a yoke from a soft magnetic material that is disposed on the magnet coil, and an armature from a soft magnetic material that is movable relative to the yoke, wherein the magnet coil, the yoke, and the armature are disposed within the air chamber; and
wherein the armature in relation to the yoke is disposed in such a manner that said armature, when the magnet coil is energized, by means of the magnetic force generated on account thereof rotates counter to a restoring force about a single rotation axis until the magnetic force corresponds to the restoring force, wherein the size of at least one overlap region between the yoke and the armature changes in the rotation of the armature, and an air gap is configured between the yoke and the armature in the at least one overlap region, wherein the spacing that is formed by the air gap between the yoke and the armature remains substantially constant in the direction of the rotation of the armature.

2. The solenoid valve as claimed in claim 1 , wherein the solenoid valve is configured so that at least one of a constant magnetic force and a magnetic force that increases in a linear manner is configured by way of energizing the magnet coil, and the restoring force increases during the rotation of the armature.

3. The solenoid valve as claimed in claim 1 , wherein a leaf spring for generating the restoring force is attached to the armature.

4. The solenoid valve as claimed in claim 1 , wherein the yoke is contacted by the armature at at least one location.

5. The solenoid valve as claimed in claim 4 , wherein the yoke is contacted by the armature at at least one location along the single rotation axis.

6. The solenoid valve as claimed in claim 1 , wherein a lever mechanism on the armature is configured in such a manner that the magnetic force which arises at that end of the armature that is opposite to the rotation axis when the magnet coil is energized is converted to a greater force for at least one of closing an air opening and opening an air opening.

7. The solenoid valve as claimed in claim 6 , wherein a protrusion is part of the lever mechanism.

8. The solenoid valve as claimed in claim 1 , wherein the armature is rigidly connected to a protrusion on which a seal element is located, which seal element in the rotation of the armature by means of the magnetic force which is generated by energizing the magnet coil closes an air opening.

9. The solenoid valve as claimed in claim 8 , wherein the seal element without the magnet coil being energized closes another air opening.

10. The solenoid valve as claimed in claim 1 , wherein the armature comprises at least one opening into which an end of the yoke penetrates in the rotation of the armature, and herein the spacing formed by the air gap between the yoke and the armature remains substantially constant in the direction of the rotation of the armature.

11. The solenoid valve as claimed in claim 1 , wherein the armature by way of a guide is secured against tilting of the rotation axis.

12. The solenoid valve as claimed in claim 11 , wherein the guide comprises a guiding cam which extends through an opening of the armature.

13. The solenoid valve as claimed in claim 11 , wherein the guide comprises a leaf spring which at at least one location is fixedly connected to the armature, and at at least one other location is fixedly connected to at least one of the coil body and the yoke.

14. The solenoid valve as claimed in claim 1 , wherein the yoke is designed so as to be U-shaped, wherein an overlap region between the yoke and the armature is created at the end of at least one leg of the U-shaped yoke when the armature is rotated.

15. The solenoid valve as claimed in claim 11 , wherein the guide is configured on a coil body that is associated with the magnet coil.

16. The solenoid valve as claimed in claim 1 , wherein the air openings are disposed at opposite ends of the air chamber.

17. The solenoid valve as claimed in claim 16 , wherein the magnet coil in terms of the longitudinal direction thereof extends between these opposite ends.

18. The solenoid valve as claimed in claim 1 , wherein the magnet coil for energizing is connected to at least one pin which by way of a sealed opening is routed out of the air chamber toward a circuit board.

Assignees

• Conti Temic Microelectronic Gmbh

Inventors

• Beuschel Michael
• Ziegelmeier Markus
• Bauer Stefan
• Kerler Alexander
• Kolbinger Martin
• Fernengel Holger

Classifications

• H01F7/17

  Pivoting and rectilinearly-movable armatures · CPC title

• F16K31/0682

  with an articulated or pivot armature · CPC title

• H01F7/088

  provided with means for absorbing shocks · CPC title

• H01F7/12

  having anti-chattering arrangements · CPC title

• Y10T137/86847

  Pivoted valve unit · CPC title