Axial securing of a pump

Patent metadata

Field	Value
Publication number	US-11815102-B2
Application number	US-202217963393-A
Country	US
Kind code	B2
Filing date	Oct 11, 2022
Priority date	Oct 12, 2021
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

A pump includes a pump housing including an inlet for the fluid on a low-pressure side, an outlet for the fluid on a high-pressure side, a circumferential wall facing faces axially away from the delivery chamber and on which the outlet emerges; a spring structure arranged on the outer end face of the end wall; a delivery member movable within the delivery chamber for delivering the fluid from the low-pressure side to the high-pressure side; and a securing device for axial securing the pump housing. The securing device includes a female holding element having an axially extending cavity and a male holding element in a joining engagement, exposable to an axial tensile load, with the female holding element in the cavity. The spring structure and/or the end wall is/are held on the pump housing by one of the holding elements by the joining engagement.

First claim

The invention claimed is:

1. A pump for supplying fluid to a unit, the pump comprising:
a pump housing comprising:
an inlet for the fluid on a low-pressure side,
an outlet for the fluid on a high-pressure side,
a circumferential wall which radially surrounds a delivery chamber, and
an end wall having an outer end face which faces axially away from the delivery chamber and on which the outlet emerges;

a spring structure which is arranged on the outer end face of the end wall;
a delivery member which can be moved within the delivery chamber for delivering the fluid from the low-pressure side to the high-pressure side; and
a securing device for axial securing the pump housing, the securing device comprising:
a female holding element having an axially extending cavity, and
a male holding element which is in a joining engagement, which can be exposed to an axial tensile load, with the female holding element in the cavity;

wherein the spring structure and/or the end wall is/are held on the pump housing by one of the holding elements by way of the joining engagement; and
the securing device is not in an axial sealing contact with a connecting wall of an accommodating device when the pump is installed;
wherein the securing device further comprises an additional holding element and the additional holding element overlaps with the end wall in an axial view and holds the pump housing axially together.

2. The pump according to claim 1 , wherein an outer end face of the spring structure and/or end wall which faces axially away from the delivery chamber is in axial contact with one of the holding elements, whereby the spring structure and/or end wall is/are held on the pump housing.

3. The pump according to claim 1 , wherein the additional holding element is formed separately from the female holding element and the male holding element and is held by way of the joining engagement between the holding elements.

4. The pump according to claim 1 , wherein the additional holding element is formed by a plate or a flat cup which is concave or convex in relation to the pump housing.

5. The pump according to claim 1 , wherein the additional holding element additionally encompasses the function of a throttle and/or cold start plate.

6. The pump according to claim 1 , wherein the additional holding element overlaps with the spring structure in an axial view onto the spring structure and holds the spring structure on the pump housing.

7. The pump according to claim 1 , wherein the additional holding element comprises at least one radially protruding tongue which overlaps with the spring structure in an axial view onto the spring structure and holds the spring structure on the pump housing.

8. The pump according to claim 1 , wherein the female holding element or the male holding element is in axial contact with a rear side of the additional holding element which faces axially away from the pump housing and presses the additional holding element against the spring structure and/or against the end wall.

9. The pump according to claim 1 , wherein, when the pump is installed, the additional holding element is exclusively in contact with the female holding element and/or the male holding element and/or the spring structure and/or the end wall.

10. The pump according to claim 1 , wherein the spring structure is in a sealing contact with the end wall and/or the connecting wall of the accommodating device when the pump is installed.

11. The pump according to claim 1 , wherein the female holding element or the male holding element protrudes axially from or through the circumferential wall into or through the end wall.

12. The pump according to claim 1 , wherein the female holding element and/or the male holding element is/are arranged on the high-pressure side of the pump.

13. The pump according to claim 1 , wherein the spring structure surrounds the female holding element and/or the male holding element in the radial direction.

14. The pump according to claim 1 , wherein the female holding element and the male holding element are in joining engagement via a screwing connection.

15. The pump according to claim 1 , wherein the female holding element and the male holding element are formed by standard parts comprising metric threads.

16. The pump according to claim 1 , wherein the securing device furthermore comprises an additional holding element.

17. The pump according to claim 3 , wherein the female holding element and/or the male holding element protrude(s) through the additional holding element.

18. The pump according to claim 4 , wherein the additional holding element is perforated and/or comprises one layer and/or is circular.

19. The pump according to claim 15 , wherein the female holding element is a standard pin comprising an internal thread and the male holding element is a matching machine screw.

Assignees

• Schwabische Huttenwerke Automotive Gmbh
• Shw Automotive Gmbh

Inventors

• Welte Claus

Classifications

• F04D29/406 Primary

  especially adapted for liquid pumps · CPC title

• F04D3/00

  Axial-flow pumps (priming or boosting F04D9/00) · CPC title

• F04C2/344 Primary

  with vanes reciprocating with respect to the inner member · CPC title

• F01C21/10

  Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M) · CPC title

• F04C2240/805

  Fastening means, e.g. bolts · CPC title