Bearing housing structure

1. A bearing housing structure comprising:

a support section configured to support a bearing;

a reception interface configured to receive lubrication grease from an external source;

grease channels configured to conduct the lubrication grease from the reception interface to a first room and to a second room, the first and second rooms being limited to mutually opposite sides of the bearing in an axial direction of the bearing when the support section is supporting the bearing;

exit conduits configured to allow the lubrication grease to exit the first and second rooms; and

an enclosed grease reservoir defined entirely within the bearing housing structure and configured to receive, from one or more of the exit conduits, the lubrication grease exiting the first and second rooms via the one or more of the exit conduits, the grease reservoir being configured to store the lubrication grease received from the one or more of the exit conduits in at least two different positions of the bearing housing structure such that the axial direction of the bearing is selectively one of horizontal, vertical, and slanted.

2. The bearing housing structure according to claim 1 , wherein the grease reservoir extends in the axial direction with respect to the bearing so that a part of the grease reservoir is beneath the bearing when the support section is supporting the bearing and the bearing housing structure is in a position where the axial direction of the bearing is vertical.

3. The bearing housing structure according to claim 2 , wherein the exit conduits are located, in a radial direction when the support section is supporting the bearing, on an opposite side of the bearing with respect to outlets of the grease channels to the first and second rooms.

4. The bearing housing structure according to claim 2 , wherein the bearing housing structure comprises rotary shaft seals on both sides of the support section.

5. The bearing housing structure according to claim 2 , wherein the bearing housing structure is an end-shield of an electric machine.

6. The bearing housing structure according to claim 1 , wherein the exit conduits are located, in a radial direction when the support section is supporting the bearing, on an opposite side of the bearing with respect to outlets of the grease channels to the first and second rooms.

7. The bearing housing structure according to claim 1 , wherein the bearing housing structure comprises rotary shaft seals on both sides of the support section.

8. The bearing housing structure according to claim 1 , wherein the bearing housing structure is an end-shield of an electric machine.

9. An electric machine comprising:

a stator;

a rotor rotatably supported by bearings; and

at least one bearing housing structure configured to support at least one of the bearings, the bearing housing structure comprising:

a support section configured to support the one of the bearings,

a reception interface configured to receive lubrication grease from an external source,

grease channels configured to conduct the lubrication grease from the reception interface to a first room and to a second room, the first and second rooms being limited to mutually opposite sides of the bearing in an axial direction of the bearing when the support section is supporting the bearing,

exit conduits configured to allow the lubrication grease to exit the first and second rooms, and

an enclosed grease reservoir defined entirely within the bearing housing structure and configured to receive, from one or more of the exit conduits, the lubrication grease exiting the first and second rooms via the one or more of the exit conduits, the grease reservoir being configured to store the lubrication grease received from the one or more of the exit conduits in at least two different positions of the bearing housing structure such that the axial direction of the bearing is selectively one of horizontal, vertical, and slanted.

10. A mobile working machine comprising:

a combustion engine;

one or more actuators and

an electromechanical power transmission chain between the combustion engine and the one or more actuators of the mobile working machine, the electromechanical transmission chain comprising at least one electric machine comprising:

a stator,

a rotor rotatably supported by bearings, and

at least one bearing housing structure configured to support at least one of the bearings, the bearing housing structure comprising:

a support section configured to support the one of the bearings,

a reception interface configured to receive lubrication grease from an external source,

grease channels configured to conduct the lubrication grease from the reception interface to a first room and to a second room, the first and second rooms being limited to mutually opposite sides of the bearing in an axial direction of the bearing when the support section is supporting the bearing,

exit conduits configured to allow the lubrication grease to exit the first and second rooms, and

an enclosed grease reservoir defined entirely within the bearing housing structure and configured to receive, from one or more of the exit conduits, the lubrication grease exiting the first and second rooms via the one or more of the exit conduits, the grease reservoir being configured to store the lubrication grease received from the one or more of the exit conduits in at least two different positions of the bearing housing structure such that the axial direction of the bearing is selectively one of horizontal, vertical, and slanted.

11. The mobile working machine according to claim 10 , further comprising a liquid cooling system configured to cool both the electromechanical power transmission chain and a hydraulic system of the mobile working machine.