DE3143000C2 - Bearing shield - Google Patents

Abstract

Closed machine with an open condensate drain opening in the circumferential area of the end shield through wall depressions (5, 6) that are angled and connected to each other in the end ring surface (2) and the axial edge projection (3) of the end shield (1), which lead to the housing (4) have appropriate distances.

Description

25th

The invention relates to a bearing plate according to the preamble of claim 1.

In the case of splash-proof electrical machines of the three-phase motor types 1 LS 4 of the applicant On the underside of the machine housing, there are often lockable drainage openings for condensation water, which may only be opened from time to time for security reasons, because they are sufficiently large drainage opening to be measured in da: penetration or Introducing, in particular, electrically conductive rod-shaped or band-shaped rigid foreign bodies into the interior of the machine with the risk of touching live or moving parts.

The invention is based on the object of providing a monitoring-free, constant, sufficient -to in a simple manner to ensure adequate drainage of condensation and the ingress or introduction of such foreign bodies to prevent inside the machine.

The task at hand is achieved with the measures according to the characteristic of claim I.

Advantageous embodiments of the invention are shown in the drawing and explained in more detail below.

F i g. 1 shows a longitudinal section through part of a bearing plate and the housing of a closed one electric machine,

F i g. 2 to 4 partial side views of the end shield with wall depressions of different contours.

According to FIG. 1, the end shield 1 has on its circumferential area 1/4 in the usual manner an end ring surface 2 from which an edge projection 3 protrudes axially. The edge projection 3 is suitably surrounded by the end zone of the cylindrical housing 4, the housing end face 4A of which rests against the end ring surface 2.

To form a condensate drainage opening is both in the end ring surface 2 and in the edge projection 3 each have a wall recess 5 or 6 attached, which are at an angle to one another are connected.

The wall recesses 5/4, 6 / \ can with part-circular Contour with the same radius according to FIG. 3 by a tool guided in the axial direction are manufactured in a joint operation,

Claims (2)

Patent claims: 1. End shield with an axial edge projection fitting into the cylindrical housing of an electrical machine with condensate water drainage projecting radially within an end ring surface resting on the annular housing end face, characterized in that the end ring surface (2) and the edge projection (3) each have at least one with each other Connected and at least once angled wall recess (5, b; 5 / 4,6 / 4; 5B, 6ß) have for condensation drainage from the inside of the machine. 2. End shield according to claim 1, characterized in that a continuous part-circular recess (5/4, 6/4 ) with a uniform diameter is incorporated in the edge projection (3) and the end ring surface (2) in the axial direction, which is greater than ek. radial height of the end ring surface (2) where the diameter is selected greater than the radial height of the end ring surface 2 so that the wall recess 5Λ is open to the outside and is connected to the wall recess 6Λ At least the axial depth of the wall recess 5/4 is chosen so that foreign bodies, in particular of the type mentioned, cannot get into the interior of the machine or be brought because they would have to be deflected for this purpose. Since the drainage openings are operationally at the lowest points of the housing or the end shields, bodies other than rod-shaped bodies can neither get into the interior of the machine by themselves nor intentionally. With an angled formation of the wall recess 5B according to FIG. 4 it would even be necessary to deflect a rod-shaped foreign body twice in two planes within the two wall recesses 5B and 65 in order to be able to penetrate the inside of the machine. For this! Sheet drawings