Liquid pump, in particular for providing a supply to a transmission of an electric or hybrid drive module of a motor vehicle

Patent metadata

Field	Value
Publication number	US-12168977-B2
Application number	US-202017102709-A
Country	US
Kind code	B2
Filing date	Nov 24, 2020
Priority date	Dec 2, 2019
Publication date	Dec 17, 2024
Grant date	Dec 17, 2024

Abstract

A liquid pump for providing a supply to a transmission of an electric or hybrid drive module of a motor vehicle, having a pump housing wherein a pump chamber and a pump rotor are arranged, wherein the pump housing has at least one intake opening, wherein a filter plate which covers at least one intake opening is attached to the pump housing.

First claim

The invention claimed is:

1. A liquid pump for providing a fluid to a transmission of an electric or hybrid drive module of a motor vehicle, comprising:
a pump housing wherein a pump chamber and a pump rotor are arranged, the pump housing has at least one intake opening;
a filter plate which covers the at least one intake opening is attached to the pump housing, the filter plate having a planar first surface which includes a plurality of filter openings formed through the planar first surface, and
a pressure-limiting valve, which has a valve body and a spring,
wherein the spring is in direct contact with the planar first surface of the filter plate.

2. The liquid pump according to claim 1 , wherein the plurality of filter openings have an opening width of at most 0.4 mm.

3. The liquid pump according to claim 2 , wherein the filter openings are formed between material portions of the filter plate that are bent relative to one another.

4. The liquid pump according to claim 2 , wherein the filter plate is an injection-moulded part.

5. The liquid pump according to claim 4 , wherein the filter openings do not have any undercut surfaces, as viewed in a direction perpendicular to a plane of the filter plate.

6. The liquid pump according to claim 1 , wherein filter slots are provided between the filter plate and the pump housing.

7. The liquid pump according to claim 6 , wherein the filter slots are formed between an inner surface of the filter plate and a recessed portion of the pump housing.

8. The liquid pump according to claim 1 , wherein the filter plate consists of a sheet metal.

9. The liquid pump according to claim 1 , wherein the filter plate is laser-or water jet-cut or is etched.

10. The liquid pump according to claim 1 , wherein the filter plate is a punched part.

11. The liquid pump according to claim 1 , wherein the filter plate has at least one latching lug, wherein the lug is configured to be locked to the pump housing.

12. The liquid pump according to claim 1 , wherein the filter plate has a spring-centering means.

13. The liquid pump according to claim 12 , wherein the spring-centering means is comprised of a plastically deformed portion of the filter plate.

14. The liquid pump according to claim 1 , further comprising mounting screws,
wherein at least one bearing body and the pump housing are screwed to one another, and wherein the mounting screws have screw heads which bear directly on the filter plate.

Assignees

• Fte Automotive Gmbh

Inventors

• Stoessel Roland

Classifications

• F04C13/005

  Removing contaminants, deposits or scale from the pump; Cleaning · CPC title

• F04B53/10

  Valves; Arrangement of valves · CPC title

• F04C15/06

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04C2/102

  the two members rotating simultaneously around their respective axes · CPC title

• F04B53/20 Primary

  Filtering · CPC title