Lubrication device for rotating machine parts

Claim 2

In an external rotor motor having a bearing (24) and a rotating part (37) journalled in the bearing, a lubricating device for the lubrication of the bearing and of the rotating part (37) comprising a lubricant reservoir (55) retaining a lubricant supply; a rotating centrifuging ring (53) for centrifuging lubricants escaping along said rotating part (37); an absorbant body (57) located in communication with said lubricant reservoir (55) and said bearing (24) and located to receive centrifuged lubricants from said centrifuging ring (53); a housing (44) for said lubrication device having a surrounding part (50) which surrounds said centrifuging ring (53) and at least a portion of said rotating part, said absorbent body (57) being located at least partially within said surrounding part (50); and an insulating end element (45) arranged against one side of the stator laminations (26) of said motor, said end element (45) comprising at least a part of said housing (44) and closing said surrounding part (50) on its side facing the stator lamination.

Claim 3

In an external rotor motor having a bearing (24) and a rotating part (37) journalled in the bearing, a lubricating device for the lubrication of the bearing and of the rotating part (37) comprising a lubricant reservoir (55) retaining a lubricant supply; a rotating centrifuging ring (53) for centrifuging lubricants escaping along said rotating part (37); an absorbant body (57) located in communication with said lubricant reservoir (55) and said bearing (24) and located to receive centrifuged lubricants from said centrifuging ring (53); a housing (44) for said lubrication device having a surrounding part (50) which surrounds said centrifuging ring (53) and at least a portion of said rotating part, said absorbent body (57) being located at least partially within said surrounding part (50); and an insulating end element (45) arranged against one side of the stator laminations (26) of said motor, said end element (45) comprising at least a part of said housing (44) and closing said surrounding part (50) on its side facing the stator lamination.

Claim 4

In an external rotor motor having a bearing (24) and a rotating part (37) journalled in the bearing, a lubricating device for the lubrication of the bearing and of the rotating part (37) comprising a lubricant reservoir (55) retaining a lubricant supply; a rotating centrifuging ring (53) for centrifuging lubricants escaping along said rotating part (37); an absorbant body (57) located in communication with said lubricant reservoir (55) and said bearing (24) and located to receive centrifuged lubricants from said centrifuging ring (53); a housing (44) for said lubrication device having a surrounding part (50) which surrounds said centrifuging ring (53) and at least a portion of said rotating part, said absorbent body (57) being located at least partially within said surrounding part (50); and an insulating end element (45) arranged against one side of the stator laminations (26) of said motor, said end element (45) comprising at least a part of said housing (44) and closing said surrounding part (50) on its side facing the stator lamination.

Claim 5

In an external rotor motor according to claim 1 wherein said centrifuging ring (53) extends in an inclined direction relative to the axial direction of said rotating part (37) and is coaxial with said rotating part (37).

Claim 6

In an external rotor motor according to claim 1 wherein said lubricating device housing (44) further includes means forming an annular recess (55) surrounding said rotating part (37) and which forms at least a portion of said lubricant reservoir.

Claim 7

In an external rotor motor according to claim 3 wherein said lubricant reservoir comprises an annular absorbent member (56) in said recess.

Claim 8

In an external rotor motor according to claim 1 wherein said surrounding part (50) is provided with a radially inwardly projecting part (51).

Claim 9

In an external rotor motor according to claim 5 wherein said projecting part (51) is formed as an annular plate which is connected liquid-tight with said surrounding part (50).

Claim 10

In an external rotor motor according to claim 1 wherein said lubricating device housing (44) is formed of plastic material.

Claim 11

In an external rotor motor according to claim 1 comprising a spring action member (58) fixedly securing said absorbent body (57) with said surrounding part (50).

Claim 12

In an external rotor motor according to claim 8 wherein said spring action member (58) has a middle portion (61) having an opening (60) therein and a plurality of spring action tongues (62) extending from said middle portion (61); and said absorbent body (57) has a radially inwardly extending portion, at least a part of the spring action member (58) resting under pressure against said radially inwardly extending portion of said absorbent body (57).

Claim 13

In an external rotor motor according to claim 9 wherein said middle portion (61) of the spring action member (58) rests under pressure against said radially inward extending portion of said absorbent body (57).

Claim 14

In an external rotor motor according to claim 9 wherein said absorbent body (57) is formed as an annular member having a substantially L-shaped cross-section.

Claim 15

In an external rotor motor according to claim 9 wherein said absorbent body (57) is formed as an annular member having a substantially L-shaped cross-section, said absorbent body (57) having a recess (70) in its circumference part, a tongue (62) of said spring action member (58) extending through said recess (70) and resting directly against said surrounding part (50).

Claim 16

In an external rotor motor according to claim 9 wherein said surrounding part (50) is provided with a radially inwardly projecting part (51) and wherein the tip (63) of at least one of said spring action tongues (62) rests against said radially inwardly projecting part (51).

Claim 17

In an external rotor motor according to claim 1 wherein the motor has an external housing member (35); and wherein said rotating part (37) comprises the motor shaft; a bushing (36) on said shaft (37) and securing the shaft in said external housing; said bushing (36) carrying said centrifuging ring (53).

Claim 18

Lubrication device according to claim 14, wherein said centrifuging ring (53) is formed as a part of said bushing (36).

Claim 19

In an external rotor motor according to claim 1 wherein the combined lubricant capacity of said absorbent body (57) and of said lubricant reservoir (55) is greater than the amount of lubricant carried therein.

Claim 20

In an external rotor motor according to claim 1 comprising means (56) for absorbing lubricant located in said lubricant reservoir (55).

Claim 21

In an external rotor motor according to claim 1 comprising sealing means (47) to close said lubricant reservoir (55).

Claim 22

Lubrication device for an electric fractional horsepower motor comprising: a stator (26); a shaft (37) rotatably mounted inside said stator (36); a bearing (24) within which said shaft rotates; a rotor (32) fixed to said shaft (37), said rotor (32) being rotatable around the outside of the stator (26); a lubricant reservoir (55) retaining a lubricant supply and located in communication with said bearing (24); a centrifuging ring (53) for centrifuging lubricants escaping from along said shaft (37); an absorbent body (57) located in communication with said lubricant reservoir and located to receive centrifuged lubricants from said centrifuging ring (53); a housing member (44) for said lubricating device fixed to the stator (26) and having a surrounding part (50) connected thereto in a liquid-tight manner for supporting said absorbent body (57), said surrounding part (50) extending substantially in parallel to said shaft (37) and being closed on its side facing the stator (26); and a spring action member (58) for securing said absorbent body (57) within said surrounding part (50).

Claim 23

Lubrication device for an electric fractional horsepower motor comprising: a stator (26); a shaft (37) rotatably mounted inside said stator (36); a bearing (24) within which said shaft rotates; a rotor (32) fixed to said shaft (37), said rotor (32) being rotatable around the outside of the stator (26); a lubricant reservoir (55) retaining a lubricant supply and located in communication with said bearing (24); a centrifuging ring (53) for centrifuging lubricants escaping from along said shaft (37); an absorbent body (57) located in communication with said lubricant reservoir and located to receive centrifuged lubricants from said centrifuging ring (53); a housing member (44) for said lubricating device fixed to the stator (26) and having a surrounding part (50) connected thereto in a liquid-tight manner for supporting said absorbent body (57), said surrounding part (50) extending substantially in parallel to said shaft (37) and being closed on its side facing the stator (26); and a spring action member (58) for securing said absorbent body (57) within said surrounding part (50).

Claim 24

Lubrication device according to claim 19 wherein said housing member (44) further includes means forming an annular recess (55) surrounding said shaft (37) and which forms at least a portion of said lubricant reservoir.

Claim 25

Lubrication device according to claim 19 comprising an isolating end part (45) arranged against one front side of the stator laminations of said motor, said end part (45) comprising at least a part of said member (44) and closing said surrounding part (50) on its side facing the stator.

Claim 26

Lubrication device according to claim 19 wherein saId surrounding part (50) is provided with a radially inwardly projecting part (51).

Claim 27

Lubrication device according to claim 22 wherein said projecting part (51) is an annular ring plate which is connected liquid-tight with said surrounding part (50) and extends radially and inwardly from said surrounding part (50).

Claim 28

Lubrication device according to claim 19 wherein said spring action member (58) has a middle portion (61) having an opening (60) therein and a plurality of spring action tongues (62) extending from said middle portion (61); and said absorbent body (57) has a radially inwardly extending portion, at least a part of the spring action member (58) resting under pressure against said radially inward extending portion of said absorbent body (57).

Claim 29

Lubrication device according to claim 24 wherein said surrounding part (50) is provided with a radially inwardly projecting member (51) and wherein the tip of at least one tongue (62) of said spring action member (58) rests against said radially inwardly projecting member (51).