Gear unit having a housing

Patent metadata

Field	Value
Publication number	US-2016290479-A1
Application number	US-201415035396-A
Country	US
Kind code	A1
Filing date	Oct 21, 2014
Priority date	Nov 8, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A gear unit includes a housing, a trough for guiding oil and reducing losses due to splashing surrounding a circumferential section of a toothing part, particularly a gear wheel, especially in the radial and axial direction, the trough including at least three parts, e.g., at least one bottom plate and two side walls, the bottom plate being screw-connected to the two side walls, the trough being fastened to the housing, the trough having an opening, particularly a channel, especially at its lowest surface area, e.g., particularly at the surface area having the greatest radial distance, in particular, during rotational movement of the gear wheel, oil being conveyed from the oil pan of the gear unit through the opening between the trough and gear wheel, especially to a position higher than the level of the oil pan, the bottom plate and the side walls being stamped bent parts.

First claim

1 - 15 . (canceled).

16 . A gear unit, comprising:
a housing including a housing top part and a housing bottom part on which the housing top part is mounted, the housing top part being disposed on a first side of a plane and the housing bottom part being disposed on the other side of the plane, the housing top part being formed in shell-like fashion, the housing top part having at least a first groove formed (a) on an inner side and extending in a longitudinal direction, (b) in one piece, and/or (c) integrally on the housing top part, the housing top part having at least one further groove formed (a) on the inner side and extending in a transverse direction, (b) in one piece, and/or (c) integrally on the housing top part, the transverse direction being aligned perpendicular to the longitudinal direction and/or being aligned parallel to an axis of an output shaft of the gear unit and/or the longitudinal direction and the transverse direction being aligned parallel to the plane.

17 . The gear unit according to claim 16 , wherein the further groove is located closer than the first groove to the top wall at least partially delimiting an interior space, and/or the further groove is located further away from the plane than the first groove.

18 . The gear unit according to claim 16 , wherein the first groove is bounded by a groove wall formed on the housing top part and by the top wall and/or the further groove is bounded by a further groove wall formed on the housing top part and by the top wall.

19 . The gear unit according to claim 16 , wherein the further groove is adapted to discharge into the first groove and/or an end area of the further groove is open such that oil flows and/or flows automatically from the further groove into the first groove.

20 . The gear unit according to claim 16 , wherein the housing top part has a top wall at least partially delimiting an interior space of the gear unit, at least one oil-guiding rib structure being (a) disposed on the top wall, (b) formed as an elevation, and/or (c) formed as a depression, one rib section of the respective oil-guiding rib structure extending from an area of the top wall having slight or vanishing slope with respect to the plane and/or a horizontal plane to an area of the top wall having a greater slope with respect to the plane.

21 . The gear unit according to claim 20 , wherein the respective oil-guiding rib structure has two or more rib sections that lead into a collector rib section and/or the housing top part has a top wall that at least partially delimits an interior of the gear unit and is curved and/or concave, in the longitudinal direction and in the transverse direction such that oil droplets sprayed up toward the top wall drip off in or counter to the transverse direction along the top wall into a groove formed on an inner side of the housing top part.

22 . The gear unit according to claim 21 , wherein an amount of a gradient of the top wall and/or a slope of the top wall relative to the horizontal direction increases greater in the transverse direction with increasing distance from a highest surface point of the top wall and/or from a surface point of the top wall with a vanishing gradient than in the longitudinal direction, and/or the collector rib section is adapted to supply oil to the groove, a collector rib section of the oil-guiding rib structure extending from an area of the top wall having a first amount of slope with respect to the plane and/or a horizontal plane to an area of the top wall having a second amount of slope with respect to the plane, the second amount being greater than the first amount.

23 . The gear unit according to claim 16 , wherein the top wall has a plurality of oil-guiding structures.

24 . The gear unit according to claim 20 , wherein the respective oil-guiding structure is arranged as a separate part and is joined to the housing top part.

25 . The gear unit according to claim 16 , wherein (a) the transverse direction is aligned parallel to an axis of an output shaft, the longitudinal direction being aligned perpendicular to and/or transverse to the transverse direction and/or the longitudinal direction being aligned parallel to a plane defined by an axis of an intermediate shaft and an axis of an output shaft, (b) the top wall is formed in a manner corresponding to a vault, and/or (c) lubricating oil is supplied from the groove to parts, bearings, and/or toothing parts.

26 . The gear unit according to claim 16 , wherein a trough adapted to guide oil and reduce losses due to splashing surrounds a circumferential section of a toothing part and/or a gear wheel in radial and axial directions, the trough including at least three parts, including at least one bottom plate and two side walls, the bottom plate being screw-connected to the two side walls, the trough being fastened to the housing, the trough having an opening and/or a channel at a lowest surface area and/or at a surface area having a greatest radial distance, during rotational movement of the toothing part and/or the gear wheel, oil being conveyed from an oil pan of the gear unit through an opening between the trough and the toothing part and/or the gear wheel, to a position higher than a level of the oil pan and/or into the groove, the bottom plate and the side walls being stamped bent parts.

27 . The gear unit according to claim 26 , wherein a distance and/or a distance in the radial direction between the bottom plate and the crowns of gear teeth is constant in an angle-at-circumference area covered by the trough, and/or the bottom plate has tab sections extending in the radial direction at which the side walls are screw-connected.

28 . The gear unit according to claim 26 , wherein one side wall has a marking at which a bore hole is placeable to lead through a screw of a screw connection.

29 . The gear unit according to claim 26 , wherein (a) the opening and/or the channel is bounded by the bottom plate and the two side walls, (b) the bottom plate and each side wall are in each instance formed in one piece and/or integrally, (c) the housing top part has a frame-like support section on which wall sections are molded, the frame-like support section being formed integrally and/or in one piece with the wall sections, as a casting and/or as a steel casting, (d) a greatest wall thickness of the wall sections is less than a greatest wall thickness of the support section, (e) the frame-like support section of the housing top part as a first and a second transverse rib the transverse ribs extending mainly in the horizontal direction and/or extending further in the horizontal direction than in any direction transverse to the horizontal direction, the frame-like support section having two first ribs, the two first ribs being set apart from each other and in each case being joined to the first transverse rib at two points set apart from each other, the first ribs extending mainly in the vertical direction and/or extending further in the vertical direction than in any direction transverse to the vertical direction, the two second ribs being set apart from each other and in each case being joined to the second transverse rib at two points set apart from each other, the second ribs extending mainly in the vertical direction and/or extending further in the vertical direction than in any direction transverse to the vertical direction, (f) each first rib and each second rib having a lifting eye at an end area facing away from the respective transverse rib, (g) a first rib is joined at an end area to a bar and/or a support bar, which is joined at another end to an end area of a second rib, t

Assignees

• Sew Eurodrive Gmbh & Co Kg

Inventors

• Wu Zili

Classifications

• F16H57/0457

  Splash lubrication · CPC title

• F16H57/021

  Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings · CPC title

• F16H57/0424 Primary

  Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes · CPC title

• F16H57/0423

  Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes · CPC title

• F16H57/03

  characterised by means for reinforcing gearboxes, e.g. ribs · CPC title