Drive device for a high pressure cleaning appliance

Patent metadata

Field	Value
Publication number	US-2023400088-A1
Application number	US-202318454501-A
Country	US
Kind code	A1
Filing date	Aug 23, 2023
Priority date	Feb 25, 2021
Publication date	Dec 14, 2023
Grant date	—

Abstract

A drive device for a high pressure cleaning appliance includes a motor, the motor shaft of which is rotatably mounted on a motor flange and is coupled to a swash plate arrangement by a planetary gearing, wherein the planetary gearing comprises a sun gear, which is connected to the motor shaft in a rotationally-fixed manner and meshes with planetary gears that are rotatably mounted on a planet carrier and are in engagement with an internally toothed ring gear, and wherein the swash plate arrangement is positioned in an oil housing. So that the drive device has a longer service life and enables a greater selection of materials in the production thereof, the motor flange and the oil housing form separate components, wherein the motor flange comprises the ring gear and the oil housing is fixed to the motor flange, wherein the motor flange forms a centering for the oil housing.

First claim

1 . A drive device for a high pressure cleaning appliance, comprising a motor, the motor shaft of which is rotatably mounted on a motor flange and is coupled to a swash plate arrangement by way of a planetary gearing, wherein the planetary gearing comprises a sun gear, which is connected to the motor shaft in a rotationally fixed manner and meshes with planetary gears that are rotatably mounted on a planet carrier and are in engagement with an internally toothed ring gear, and wherein the swash plate arrangement is positioned in an oil housing, wherein the motor flange and the oil housing form separate components, wherein the motor flange comprises the ring gear and the oil housing is fixed to the motor flange, wherein the motor flange forms a centering for the oil housing.

2 . The drive device in accordance with claim 1 , wherein the oil housing is connected to the motor flange in a positive-locking manner.

3 . The drive device in accordance with claim 1 , wherein the motor flange and the oil housing comprise interengaging positive-locking elements.

4 . The drive device in accordance with claim 1 , wherein the motor flange comprises an annular groove, and wherein the oil housing comprises a collar, which dips into the annular groove in an exactly fitting manner.

5 . The drive device in accordance with claim 1 , wherein the swash plate arrangement comprises a swash body, wherein arranged on the front side of the swash body pointing away from the motor flange is a front bearing ring on which a pressure plate is supported by way of front rolling bodies, and wherein arranged on the rear side of the swash body pointing toward the motor flange is a rear bearing ring, which is supported by way of rear rolling bodies on a support ring held on the oil housing.

6 . The drive device in accordance with claim 5 , wherein the swash body comprises at least one front centering element and at least one rear centering element, wherein the at least one front centering element centers the front bearing ring, and wherein the at least one rear centering element centers the rear bearing ring.

7 . The drive device in accordance with claim 6 , wherein the at least one front centering element passes through the front bearing ring.

8 . The drive device in accordance with claim 7 , wherein the pressure plate is of annular configuration and the at least one front centering element passes through the pressure plate.

9 . The drive device in accordance with claim 6 , wherein the at least one rear centering element passes through the rear bearing ring.

10 . The drive device in accordance with claim 6 , wherein the swash body comprises a front centering element, which forms a cylindrical sleeve that on the side pointing away from the motor flange projects from a base part of the swash body and whose central axis is inclined relative to the longitudinal axis of the drive device.

11 . The drive device in accordance with claim 10 , wherein the swash body comprises a rear centering element, which forms a cylindrical collar that on the side pointing toward the motor flange projects from the base part of the swash body and is oriented coaxially to the longitudinal axis.

12 . The drive device in accordance with claim 5 , wherein the swash body comprises a projection, which preferably at least partially surrounds the front bearing ring and preferably also the pressure plate in the circumferential direction.

13 . The drive device in accordance with claim 5 , wherein the oil housing forms a receptacle into which the support ring dips, wherein the receptacle supports the support ring in the axial and radial direction.

14 . The drive device in accordance with claim 1 , wherein the swash body is connected to the planet carrier in a positive-locking manner.

15 . The drive device in accordance with claim 14 , wherein the swash body comprises a non-circular perforation, into which a connecting portion of the planet carrier that is formed complementary to the perforation dips in an exactly fitting manner.

16 . The drive device in accordance with claim 1 , wherein the swash body comprises a hollow cone, which is oriented coaxially to the longitudinal axis of the drive device and into which a connecting portion of the planet carrier that is formed complementary to the hollow cone dips.

17 . The drive device in accordance with claim 1 , wherein the planet carrier comprises a hollow shaft, which passes through the swash body.

18 . The drive device in accordance with claim 17 , wherein the hollow shaft protrudes out of the swash body in the direction pointing away from the motor flange.

19 . The drive device in accordance with claim 1 , wherein the swash body comprises at least one through-opening, which forms a flow path for oil from the front side pointing away from the motor flange to the rear side of the swash body pointing toward the motor flange.

20 . The drive device in accordance with claim 1 , wherein the swash body is axially fixed to the planet carrier.

Assignees

• Kaercher Alfred Se & Co Kg

Inventors

• Mueller Wolfgang
• Maier Thomas
• Nathan Robert
• Kerkow Manuel

Classifications

• F16H37/124 Primary

  for interconverting rotary motion and reciprocating motion · CPC title

• B08B3/02

  Cleaning by the force of jets or sprays · CPC title

• F16H57/045

  Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case · CPC title

• F16H57/0486

  with fixed gear ratio  (axle or inter-axle differentials F16H57/0483) · CPC title

• F16H57/082

  Planet carriers · CPC title