Internal gear pump having a rotationally fixed axial disk

Patent metadata

Field	Value
Publication number	US-9765779-B2
Application number	US-201314764385-A
Country	US
Kind code	B2
Filing date	Dec 9, 2013
Priority date	Jan 29, 2013
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

An internal gear pump for a slip-controlled hydraulic vehicle braking system includes a pump shaft that is mounted rotatably on one side of a pinion and a ring gear that is mounted rotatably in an axial disk. The axial disk seals off the pinion and the ring gear at the sides.

First claim

The invention claimed is:

1. An internal gear pump for a hydraulic vehicle brake system, comprising:
a pump shaft;
a pinion arranged on and configured for conjoint rotation with the pump shaft;
an annulus that meshes with the pinion;
a rotationally fixed axial disk that is arranged on and bears in a sealing manner against an end side of the pinion and of the annulus, wherein the axial disk is fixed radially and includes a bearing that rotatably supports the pump shaft; and
a pressure disk on a first side of the pinion and the annulus opposite the axial disk, the pressure disk being rotationally fixed and axially movable, wherein:
the axial disk is axially movable with respect to the pinion and the annulus,
a pressure field is defined on an outer side of the pressure disk opposite the pinion and the annulus, the pressure field urging the pressure disk against the first side of the pinion and the annulus when the pressure field is pressurized.

2. The internal gear pump as claimed in claim 1 , wherein the axial disk rotatably supports the pump shaft on a side of the pinion opposite the pump shaft.

3. The internal gear pump as claimed in claim 1 , further comprising a sealing sleeve that seals against the pump shaft.

4. The internal gear pump as claimed in claim 3 , further comprising a supporting disk arranged on a side of the sealing sleeve opposite the pinion and annulus, the supporting disk axially supporting the sealing sleeve.

5. The internal gear pump as claimed in claim 1 , wherein the further comprising a cover defining a pump outlet that opens on a circumference of the cover.

6. The internal gear pump as claimed in claim 5 , further comprising an encircling seal on each axial side of a mouth opening of the pump outlet.

7. The internal gear pump as claimed in claim 5 , wherein the cover is arranged on a side of the pinion and annulus opposite the axial disk.

8. The internal gear pump as claimed in claim 1 , wherein a pump inlet is defined through the axial disk.

9. The internal gear pump as claimed in claim 1 , wherein the internal gear pump forms an assembly formed as a preassembled standard unit.

Assignees

• Bosch Gmbh Robert

Inventors

• Ambrosi Massimiliano
• Eisenlauer Michael
• Schepp Rene
• Kurz Edgar
• Alaze Norbert

Classifications

• F04C2240/50

  Bearings · CPC title

• F04C14/265

  being obtained by displacing a lateral sealing face · CPC title

• F04C27/006

  Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type pumps, e.g. gear pumps · CPC title

• F04C2/084

  Toothed wheels · CPC title

• F04C15/0023

  Axial sealings for working fluid · CPC title