Electric stator for an expansion valve

Patent metadata

Field	Value
Publication number	US-12445005-B2
Application number	US-202117541217-A
Country	US
Kind code	B2
Filing date	Dec 2, 2021
Priority date	Dec 3, 2020
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

An electric stator for an expansion valve may include a first and a second coil body, a first electric connecting element, and a second electric connecting element. The first and second coil bodies may be substantially ring-shaped and extend along a circumferential direction. The first electric connecting element may protrude from the first coil body along an axial direction. The second electric connecting element may protrude from the second coil body. The first and second coil bodies may be arranged next to one another along the axial direction and may be fastened to one another via a common positioning aid.

First claim

The invention claimed is:

1. An electric stator for an expansion valve, comprising:
a first coil body and a second coil body which are substantially ring-shaped and extend along a circumferential direction, each of the first and second coil body including a stator winding arranged thereon which can be electrically supplied with current;
a first electric connecting element protrudes from the first coil body along an axial direction which runs perpendicular to the circumferential direction;
a second electric connecting element protrudes from the second coil body;
wherein the first and second coil bodies are arranged next to one another along the axial direction and are fastened to one another via a common positioning aid; and
wherein the first and second connecting elements are arranged next to one another along the circumferential direction and are connected to one another in a positive manner.

2. The stator according to claim 1 , wherein
the first connecting element is arranged axially offset from the first coil body and radially on the outside of the first coil body; and/or
the second connecting element is arranged axially offset from the second coil body and radially on the outside of the second coil body.

3. The stator according to claim 1 , wherein the first coil body and/or the second coil body comprise a plastic.

4. The stator according to claim 1 , wherein the first and second coil bodies are fastened to one another via a press fit which is part of the positioning aid.

5. The stator according to claim 1 , wherein the first connecting element comprises a guide fin and the second connecting element comprises a recess, wherein the guide fin engages into the recess.

6. The stator according to claim 1 , wherein
the positioning aid comprises at least one pin-like or bolt-like first extension which protrudes axially from the first coil body and which engages with a second recess which is formed in a complementary manner to the first extension and which is arranged at the second coil body; and/or
the positioning aid comprises at least one second extension which protrudes axially from the second coil body and which engages with a first recess which is formed in a complementary manner to the second extension and which is arranged at the first coil body.

7. The stator according to claim 6 , wherein
at least two of first extensions and second recesses are present; and/or
at least two of second extensions and first recesses are present.

8. The stator according to claim 7 , wherein
the first extensions or the second recesses are arranged along the circumferential direction equidistant from one another; and/or
the second extensions or the first recesses are arranged along the circumferential direction equidistant from one another.

9. The stator according to claim 1 , wherein the first and second connecting element have a respective electrically insulating first or second connecting housing, in which two electrically conductive connections are made of a metal and which are connected in an electrically conductive manner to the stator winding of the first and second coil bodies.

10. The stator according to claim 9 , wherein at least one guide fin extends axially and engages with a recess, the recess is formed in a complementary manner to the guide fin and extends axially and is provided at the second connecting housing and protrudes from the first connecting housing, or is provided at the first connecting housing and protrudes from the second connecting housing.

11. The stator according to claim 9 , wherein
the first coil body and the first connecting element are molded integrally to one another; and/or
the second coil body and the second connecting element are molded integrally to one another.

12. The stator according to claim 1 , wherein a first pole sheet and a second pole sheet are attached to each of the first and second coil bodies, and wherein the first and second pole sheets are in contact.

13. The stator according to claim 12 , wherein
each of the first and second pole sheets has a ring-shaped base body from which several flap-like protrusions are arranged along the circumferential direction, equidistantly from one another, the protrusions protrude at a right angle along the axial direction, so that a respective recess is formed between two protrusions which are adjacent to one another in the circumferential direction; and
the protrusions of the first pole sheet abut against the outer circumference of the base body of the second pole sheet, and the protrusions of the second pole sheet abut against the outer circumference of the base body of the first pole sheet.

14. An expansion valve for an air conditioning system of a motor vehicle, comprising:
a housing surrounding a housing interior;
a rotor which can be rotated relative to the housing; and
a stator arranged in the housing interior, the stator including:
a first coil body and a second coil body which are substantially ring-shaped and extend along a circumferential direction, each of the first and second coil body including a stator winding arranged thereon which can be electrically supplied with current;
a first electric connecting element protrudes from the first coil body along an axial direction which runs perpendicular to the circumferential direction;
a second electric connecting element protrudes from the second coil body;
wherein the first and second coil bodies are arranged next to one another along the axial direction and are fastened to one another via a common positioning aid; and

wherein at least one guide rail is present at the housing for guiding the first and/or second connecting element or a first and/or second connecting housing along the axial direction.

15. The expansion valve according to claim 14 , wherein the first and/or second connecting housing of the first and/or second connecting element is composed of an electrically insulating plastic.

16. An electric stator for an expansion valve, comprising:
a first coil body and a second coil body that are substantially ring-shaped and extend along a circumferential direction, each of the first coil body and the second coil body including a stator winding arranged thereon that can be electrically supplied with current;
a first electric connecting element protruding from the first coil body along an axial direction that runs transversely to the circumferential direction;
a second electric connecting element protruding from the second coil body;
wherein the first coil body and the second coil body are arranged next to one another along the axial direction and are secured to one another via a common positioning aid;
wherein the first connecting element and the second connecting element have a respective electrically insulating first or second connecting housing, in which two electrically conductive connections are connected in an electrically conductive manner to the stator winding of the first and second coil bodies; and
wherein at least one guide fin extends axially and engages with a recess, the recess is formed in a complementary manner to the at least one guide fin and extends axially and is provided at the second connecting housing and protrudes from the first connecting housing, or is provided at the first connecting housing and protrudes from the second connecting housing.

17. The stator according to claim 16 , wherein the first connecting element is arranged axially offset from the first coil body and radially on the outside of the first coil body.

18. The stator according to claim 16 , wherei

Assignees

• Mahle Int Gmbh

Inventors

• Van Delden Jeffrey
• Lindenberg Matthias
• Wetzel Florian

Classifications

• H02K1/165

  Shape, form or location of the slots · CPC title

• H02K3/12

  arranged in slots · CPC title

• H02K5/02

  Casings or enclosures characterised by the material thereof · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K3/525

  Annular coils, e.g. for cores of the claw-pole type · CPC title