Electric motor

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG.
1 shows an electric motor having a stator 2 which is arranged in a fixed position in a tubular housing 1, and having a rotor 3 which is mounted in a rotationally fixed manner inside the stator 2.
The rotor 2 is mounted on a shaft 4.
The housing 1 has a bearing plate 5, 6 on each of its end faces.
One of the bearing plates 5 has a fixed bearing 7 which holds the shaft 4 in the axial and radial directions.
The second bearing plate 6 has a loose bearing 8 which holds the shaft 4 exclusively radially.
The bearing plate 5 which holds the fixed bearing 7 has a hole 10, which is bounded by a stop 9, for holding the fixed bearing 7.
The fixed bearing 7 has a clearance fit in the hole 10 and a push fit on the shaft 4.
FIG.
2 uses a highly enlarged illustration of the electric motor in the region of the fixed bearing 7 from FIG.
1 to show that the fixed bearing 7 is prestressed against the stop 9 by means of a spring element 11.
A recess 12 having a larger diameter than the hole 10 is arranged in the bearing plate 5, on the side of the hole 10 facing away from the stop 9, in order to hold the radially outer region of the spring element 11.
On the side opposite the fixed bearing 7, the spring element 11 is secured axially by a circumferential rim 13.
This rim 13 was produced, for example, by peening the bearing plate 5.
The rim 13 prestresses the radially outer region of the spring element 11 in the direction of the stop 9 for the fixed bearing 7.
Since the spring element 11 requires only a particularly short spring movement, it may be in the form of a washer manufactured from sheet steel.
The spring element 11 has a larger external diameter than the fixed bearing 7.
The spring element has a concave shape.
The stop 9 comprises a separate member from said bearing plate 5 for the fixed bearing and has a bulge projecting axially downwardly and pressingly engaging a radially inner edge of a radially outer race of the fixed bearing, and at a top of the stop 9 the stop engages the bearing plate 5 for the fixed bearing