Device for lubricating an antifriction bearing of an electric motor

Patent metadata

Field	Value
Publication number	US-10267364-B2
Application number	US-201515316329-A
Country	US
Kind code	B2
Filing date	Jun 1, 2015
Priority date	Jun 6, 2014
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

A device for lubricating an antifriction bearing of an electric motor includes a lubrication chamber located around a shaft of the electric motor and adjacent to the antifriction bearing when the shaft rotates. The lubrication chamber has a radial outer wall which is provided with at least one opening. An oil reservoir configured for arrangement on an exterior or an interior of the electric motor includes an oil pan and a ring-shaped or disk-shaped oil delivery member which directly or indirectly moves along on the shaft and is configured to run through the oil pan and to enable oil to be transported from the oil pan into the lubrication chamber, with oil being able to flow out of the lubrication chamber via the at least one opening back into the oil pan.

First claim

The invention claimed is:

1. A device for lubricating an antifriction bearing of an electric motor, comprising:
a lubrication chamber located around a shaft of the electric motor and adjacent to the antifriction bearing when the shaft rotates, said lubrication chamber having a radial outer wall provided with at least one opening;
an oil reservoir configured for arrangement on an exterior or an interior of the electric motor, said oil reservoir comprising an oil pan and a ring-shaped or disk-shaped oil delivery member which moves along on the shaft and is configured to run through the oil pan and to enable oil to be transported from the oil pan into the lubrication chamber, with oil being able to flow out of the lubrication chamber via the at least one opening back into the oil pan; and
at least one member selected from the group consisting of an outer centrifugal disk arranged on the shaft adjacent to the lubrication chamber in an axial direction away from the electric motor and an inner centrifugal disk arranged on the shaft in an axial direction toward the electric motor,
wherein the member has a peripheral groove provided on a side facing the lubrication chamber and having a radial exterior with a cross section defined by a first radius and a radial interior with a cross section defined by a second radius, with the first radius being smaller than the second radius.

2. The device of claim 1 , further comprising a bush arranged on the shaft, said oil delivery member running on the bush.

3. The device of claim 2 , wherein the oil delivery member has an internal diameter which is greater than an external diameter of the bush.

4. The device of claim 1 , wherein the oil delivery member has an internal diameter which is greater than an external diameter of the shaft.

5. The device of claim 1 , further comprising at least one shaft sealing ring configured to seal the shaft in an axial direction behind the anti-friction bearing toward the electric motor and/or away from the lubrication chamber in relation to an environment.

6. The device of claim 5 , wherein the shaft sealing ring is configured as a touching or contactless seal.

7. The device of claim 1 , further comprising a return channel for returning oil from a region behind the antifriction bearing into the oil pan.

8. The device of claim 1 , wherein the oil delivery member has a substantially trapeze-shaped cross-section defined by two parallel sides, with a longer one of the two parallel sides pointing inwards.

9. The device of claim 1 , wherein the oil reservoir has an oil inlet opening and an oil outlet opening on a base of the oil pan, and further comprising an oil outlet screw adapted to close the outlet opening.

10. The device of claim 1 , wherein the oil reservoir includes a window for inspection.

11. A device for lubricating an antifriction bearing of an electric motor, comprising:
a lubrication chamber located around a shaft of the electric motor and adjacent to the antifriction bearing when the shaft rotates, said lubrication chamber having a radial outer wall provided with at least one opening;
an oil reservoir configured for arrangement on an exterior or an interior of the electric motor, said oil reservoir comprising an oil pan and a ring-shaped or disk-shaped oil delivery member which moves along on the shaft and is configured to run through the oil pan and to enable oil to be transported from the oil pan into the lubrication chamber, with oil being able to flow out of the lubrication chamber via the at least one opening back into the oil pan; and
two shaft sealing rings arranged in succession behind the anti-friction bearing in a direction toward the electric motor, with a pressure-equalization channel being provided between the two shaft sealing rings and connected to an environment of the electric motor.

Assignees

• Siemens Ag

Inventors

• Niedermeyer Josef
• Ressel Ekkehard

Classifications

• F16C35/042

  Housings for rolling element bearings for rotary movement · CPC title

• F16C33/6666 Primary

  from an oil bath in the bearing housing, e.g. by an oil ring or centrifugal disc · CPC title

• F16C19/06

  with a single row or balls · CPC title

• F16C2380/26

  Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators · CPC title

• H02K7/08

  Structural association with bearings · CPC title