Swash drive

Abstract

The invention relates to a swash drive for a high-pressure cleaning appliance, having a swash body which can be driven in rotation about an axis of rotation, and having a swash plate which is inclined in relation to the axis of rotation and on the face of which there can engage pistons of a piston-pump which are movable back and forth parallel to the axis of rotation, the swash body butting against a supporting plate via a supporting bearing and a swash-plate bearing being disposed between the swash body and the swash plate. In order to develop the swash drive such that it is possible to increase the inclination of the swash plate without any risk of damaging the supporting bearing, it is proposed according to the invention that the supporting bearing be configured as an angular-contact ball bearing, the swash body supporting the bearing balls of the supporting bearing on the outside.

1 . Swash drive for a high-pressure cleaning appliance, having a swash body which can be driven in rotation about an axis of rotation, and having a swash plate which is inclined in relation to the axis of rotation and on the face of which there can engage pistons of a piston-pump which are movable back and forth parallel to the axis of rotation, the swash body butting against a supporting plate via a supporting bearing and a swash-plate bearing being disposed between the swash body and the swash plate, the supporting bearing being configured as an angular-contact ball bearing, and the swash body supporting the bearing balls of the supporting bearing on the outside.  
   
   
       2 . Swash drive according to  claim 1 , wherein the supporting plate has a central opening which is bounded by a radially oriented inner flange which merges, via a cranked portion, into a radially oriented outer flange, the cranked portion, on the swash-body side, forming a bearing channel for the supporting bearing.  
   
   
       3 . Swash drive according to  claim 2 , wherein, in relation to the axis of rotation of the swash body, the inner flange is offset with respect to the outer flange in the direction of the swash body.  
   
   
       4 . Swash drive according to  claim 1 , wherein the swash body forms, on the supporting-plate side, a bearing channel for the supporting bearing and is followed by a collar which is oriented in the direction of the supporting plate and overlaps the bearing balls of the supporting bearing.  
   
   
       5 . Swash drive according to  claim 1 , wherein the swash body forms a bearing channel on the swash-plate side and supporting-plate side in each case, the radial spacing between the base of the swash-plate-side bearing channel and the base of the supporting-plate-side bearing channel being smaller than the diameter of the bearing balls of the supporting bearing.  
   
   
       6 . Swash drive according to  claim 1 , wherein the bearing balls of the swash-plate bearing differ in diameter from the bearing balls of the supporting bearing.  
   
   
       7 . Swash drive according to  claim 1 , wherein the swash-plate bearing is configured as an angular-contact ball bearing.  
   
   
       8 . Swash drive according to  claim 7 , wherein the swash body is configured, in an outer region, as a collar which is directed toward the supporting plate and, in a central region, as a protrusion which is directed toward the swash plate, the swash body forming in the transition region between the collar and the protrusion, on the supporting-plate side, a bearing channel of the supporting bearing and, on the swash-plate side, a bearing channel of the swash-plate bearing.  
   
   
       9 . Swash drive according to  claim 8 , wherein the swash body is configured, in its central inner region, as a well-like depression with a base wall which is oriented parallel to the supporting plate and has a central opening.  
   
   
       10 . Swash drive according to  claim 7 , wherein the swash plate forms a planar annular plate which merges, via a bent-around portion, into a collar which is directed toward the swash body, the bent-around portion forming, on the swash-body side, a bearing channel of the swash-plate bearing.  
   
   
       11 . Swash drive according to  claim 1 , wherein mounted in the supporting plate is an electric motor, the motor shaft of which is mounted in a rotationally fixed manner on the swash body and is supported in a rotatable manner via the supporting bearing.  
   
   
       12 . Swash drive according to  claim 11 , wherein the electric motor is configured as an external rotor motor with a stator, which is mounted on the supporting plate, and a rotor, which is fitted around the stator and is connected in a rotationally fixed manner to the motor shaft.  
   
   
       13 . Swash drive according to  claim 12 , wherein the motor shaft is supported in a rotatable manner at two locations, namely on the stator, via a motor bearing, and on the supporting plate, via the supporting bearing.  
   
   
       14 . Swash drive according to  claim 12 , wherein the motor shaft is supported in a rotatable manner only at one end, namely on the supporting plate, via the supporting bearing.  
   
   
       15 . Swash drive according to one of  claim 1 , wherein the swash drive has a cup-like housing with a base wall and a circumferential wall projecting therefrom, the base wall having an opening and being clamped in between the supporting plate and the stator.