Pump unit

Patent metadata

Field	Value
Publication number	US-10027199-B2
Application number	US-201314655374-A
Country	US
Kind code	B2
Filing date	Dec 20, 2013
Priority date	Dec 27, 2012
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A pump assembly with an electric motor which includes a stator housing (6) and an electronics housing (4; 50) fastened at the outside on the stator housing (6). The electronics housing (4; 50) is connected to the stator housing (6) via at least one fastening element (24, 24′; 56). The fastening element is situated within an outer contour of the electronics housing (4; 50) which is delimited by the outer walls of the electronics housing (4; 50) and is accessible even with a closed electronics housing (4; 50).

First claim

The invention claimed is:

1. A pump assembly comprising:
an electric motor;
a stator housing and an electronics housing fastened at the outside on the stator housing; and
at least one fastening element, wherein the electronics housing is connected to the stator housing via said fastening element, said fastening element being situated within an outer contour of the electronics housing which outer contour is delimited by the outer walls of the electronics housing and being accessible with a closed electronics housing, the electronics housing comprising at least one base part and a cover part, the at least one fastening element being arranged such that the cover part is releasable from the base part independently of the fastening element, the base part being fastened with at least one screw as a fastening element, on the stator housing, and the cover part comprising at least one opening lying opposite the screw in the direction of the longitudinal axis of the screw, wherein the space between the screw and the opening is free.

2. A pump assembly according to claim 1 , wherein the electronics housing comprises a base surface which on at least one side extends beyond an outer contour of the stator housing and is larger than an adjacent outer side of the stator housing.

3. A pump assembly according to claim 1 , wherein the electronics housing is fastened axially on the stator housing.

4. A pump assembly according to claim 1 , wherein the cover part and the base part of the electronics housing are screwed to one another.

5. A pump assembly according to claim 1 , wherein the opening in the cover part is covered by a cover film arranged on a side of the cover part which is away from the base part.

6. A pump assembly according to claim 5 , wherein the cover film is bonded to the cover part.

7. A pump assembly according to claim 4 , wherein screws which connect the cover part to the base part are not covered by the cover film.

8. A pump assembly according to claim 1 , wherein the at least one screw, with which the base part is fastened on the stator housing, engages into an inner thread on a wall of the stator housing.

9. A pump assembly according to claim 1 , wherein at least one guide sleeve is formed in the base part, through which guide sleeve the screw extends.

10. A pump assembly according to claim 9 , wherein the guide sleeve in the base part extends up to the opening in the cover part or to into the opening in the cover part.

11. A pump assembly according to claim 9 , wherein the screw with a screw head or designed as a nut, bears on an axial face side of the guide sleeve.

12. A pump assembly according to claim 1 , wherein the screw does not project beyond the face side of the cover part which is away from the base part.

13. A pump assembly according to claim 1 , further comprising at least one circuit board arranged in the electronics housing, said circuit board comprising at least one recess which lies opposite the screw in the direction of its longitudinal axis or through which the screw extends.

14. A pump assembly according to claim 9 , further comprising at least one circuit board arranged in the electronics housing, said circuit board comprising at least one recess which lies opposite the screw in the direction of its longitudinal axis or through which the screw extends, wherein:
at least one guide sleeve is formed in the base part, through which guide sleeve the screw extends;
the guide sleeve extends through the recess in the circuit board.

15. A pump assembly according to claim 1 , further comprising:
at least one electrical plug connection between the stator housing and the electronics housing.

16. A pump assembly according to claim 1 , wherein the pump assembly is designed as a circulation pump assembly with a wet-running electric motor.

Assignees

• Grundfos Holding As

Inventors

• Schuldt Christian
• Danielsen Carl-Christian

Classifications

• H02K11/30

  Structural association with control circuits or drive circuits · CPC title

• F04D29/5806

  Cooling the drive system · CPC title

• H02K5/225 Primary

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• F04D13/0686 Primary

  Mechanical details of the pump control unit (pump control F04D15/00) · CPC title

• F04D29/18

  Rotors (specially for elastic fluids F04D29/26) · CPC title