Lubrication channel of a gearbox

Abstract

Lubrication channel of a gearbox. Lubrication channel (2) of a gearbox (1) of a rotating electrical machine, the channel (2) comprising a flow floor (9) having a bottom surface (10) and one or more discharge ports (25, 26, 27, 28) formed in the flow floor (9), the bottom surface (10) being bordered by guide walls (11, 12) attached to the flow floor (9), so as to form at least one circulation channel (17, 18, 19) of lubricant towards the discharge port(s) (25, 26, 27, 28), and at least one discharge port (25, 26, 27, 28) being surrounded by a raised rim (37). Figure for the abbreviation: Figure 4

Description

Title of the invention: Lubrication channel for a gearbox technical field

[0001] The present invention relates to the field of gearboxes for rotating electrical machines, and in particular the lubrication of these gearboxes of rotating electrical machines.

[0002] The machines can be synchronous or asynchronous, and alternating current. They can be traction or propulsion machines for electric (Battery Electric Vehicle) and / or hybrid (Hybrid Electric Vehicle - Plug-in Hybrid Electric Vehicle) motor vehicles, such as passenger cars, vans, trucks, or buses. The invention also applies to rotating electrical machines for industrial and / or power generation applications, particularly in the marine, aeronautical, or wind power sectors. Previous technique

[0003] Lubrication of the gearboxes of rotating electrical machines is essential for their proper operation and reliability, in order to reduce friction and wear generated by the movements of the various components within them. However, over time, dust and other particles of various materials, such as aluminum, steel, or plastic, can mix with the lubricant and damage the bearings and gears, among other things, of the gearbox.

[0004] It is known in the prior art to provide a chute comprising a lubricant guide allowing the lubricant to be distributed within the reducer as well as means for retaining at least part of the particles present in the lubricant circulating in the chute.

[0005] Patent application JP09210185 describes a transmission lubrication channel having a stepped cavity beneath its flow floor, the cavity retaining lubricant particles. The channel is in the form of a conduit open at its ends, the lubricant entering the channel and being distributed, after passing through the channel, to the transmission gears via the ends of the open conduit.

[0006] French patent application FR 3 109 619 describes multiple conical cavities arranged in the thickness of the floor of a gearbox lubrication channel to allow lubricant to drain while trapping unwanted particles. The channel provides several channels for the lubricant to flow over the gears and bearings of the gearbox.

[0007] Applications FR 3 082 264, FR 3 121 721, EP 2 199 645 and FR 3 109 619 in a The second embodiment discloses channels comprising walls formed of magnetizable materials or magnets, capable of attracting magnetic particles transported by the lubricant. FR 3 082 264 and EP 2 199 645 respectively present lubrication channels for a gearbox and a transmission, evacuating the lubricant to gears and bearings by means of discharge channels.

[0008] The magnetic walls mentioned above effectively retain the magnetic particles carried by the lubricant. However, given the diverse nature of the particles, which may be made of plastic, for example, many particles cannot be retained by these magnetic walls.

[0009] There is a need for a chute that allows a lubricant to be guided efficiently and precisely to specific elements of a gearbox of a rotating electrical machine, while retaining particles, both magnetic and non-magnetic, carried by the lubricant. Summary of the invention

[0010] The invention aims to meet all or part of this need and achieves this, according to one of its aspects, by means of a lubrication chute for a rotating electrical machine gearbox, the chute comprising a flow floor having a bottom surface and one or more discharge orifices provided in the flow floor, the bottom surface being bordered by guide walls attached to the flow floor, so as to form at least one circulation channel for a lubricant towards the discharge port(s), and at least one discharge opening being surrounded by a raised rim.

[0011] A gearbox may include at least one input shaft, one output shaft, one transmission stage, one lubrication channel, and one housing in which the input and output shafts, the transmission stage, and the channel are housed. The transmission stage may include one or more secondary shafts, in particular one or two, so that motion is transmitted between the input shaft and the output shaft.

[0012] The term "lubrication channel" means a channel through which a lubricant can flow. The channel is configured to direct and discharge the lubricant towards at least one element of the gearbox.

[0013] The reduction element can be chosen from: a bearing, a pinion, a gear, a gear, a primary shaft, a secondary shaft of a transmission stage or an output shaft, a housing, a seal, this list not being exhaustive.

[0014] The lubricant may be a fluid lubricant, for example a liquid. Preferably, it This is an oil, specifically a gearbox oil.

[0015] The chute can be open upwards. It can be without a top wall.

[0016] The chute can provide an elongated, conduit-shaped circulation corridor.

[0017] The chute can extend along a straight axis. Alternatively, the chute can have an L-shape.

[0018] By "flow floor" is meant a lower wall of the chute over which the lubricant can flow.

[0019] By "guide walls" is meant lateral walls of the chute, in particular longer than they are high. The chute may have two guide walls, one on the gearbox side and another on the machine side.

[0020] The guide walls can have different heights. Alternatively, they have the same height.

[0021] The guide wall on the reducer side can have a height between 5 and 50 mm, better between 6 and 35 mm, better between 7 and 25 mm, for example 9 mm.

[0022] The machine-side guide wall can have a height between 5 and 50 mm, better between 6 and 35 mm, better between 7 and 25 mm, for example 22 mm.

[0023] The "bottom surface" of the flow floor refers to the inner face of the flow floor, which is bordered by the guide walls. The bottom surface is the upper surface of the flow floor.

[0024] The term "flow channel" means a channel, in particular one with a width less than or equal to that of the chute, allowing the lubricant to flow along at least part of the length of the chute. The guide walls bordering the bottom surface of the flow floor form a first flow channel within the chute.

[0025] By "discharge orifice" is meant a hole provided in the floor of the chute. This is an orifice through which the lubricant can flow out of the chute and lubricate at least one element of the reducer located below the chute.

[0026] Choosing a discharge orifice instead of a discharge channel allows for more precise delivery of the lubricant to strategic components of the gearbox that require lubrication. This improves lubrication accuracy and prevents lubricant loss.

[0027] By "rim" is meant a projection which borders the discharge opening.

[0028] By "raised rim," it is understood that the projection is significantly raised upwards, in particular by at least 0.5 mm, relative to the bottom surface of the flow floor. The raised rim of the orifices, exceeding the maximum particle size, allows most of the lubricant to flow through the discharge orifices by retaining the particles in a residue by sedimentation. lubricant at the bottom of the chute, especially heavy particles. Description of the invention

[0029] One of the guide walls may include centering pins. It may include rivets. The pins and / or rivets may be designed to cooperate with fixing holes provided in a gearbox housing, in order to respectively allow the centering and fixing of the chute to the housing.

[0030] One of the guide walls may include a flexible tab that can be braced against an inner face of the gearbox housing. The tab may be elastic and deformable. The flexible tab may prevent movement of the chute within the gearbox. This guide wall may be opposite the guide wall having centering pins and / or rivets. Preferably, the guide wall with the flexible tab does not have centering pins or rivets.

[0031] The chute may further comprise one or more internal walls. The internal walls may have a height less than or equal to the height of the guide walls.

[0032] The internal wall(s) may be parallel to the guide walls. An internal wall and a guide wall may form a lubricant flow channel between them. Two internal walls may form a lubricant flow channel between them. In particular, the chute may comprise a single internal wall and two guide walls, so as to form two flow channels for the lubricant.

[0033] The traffic lanes may have the same width. Alternatively, they may have different widths.

[0034] The traffic lanes may extend along the entire length of the chute. Alternatively, at least one of the traffic lanes may extend only along part of the length of the chute before joining another traffic lane.

[0035] The chute may have an inlet wall, which may be arranged transversely to the direction of lubricant flow in the chute. The inlet wall may be attached obliquely to the flow floor.

[0036] The inlet wall can be placed opposite an output wheel of the reducer, so as to recover inside the chute at least part, or even most, of the lubricant projected upwards by the output wheel.

[0037] The inlet wall may include a notch arranged opposite the outlet wheel to facilitate the entry of lubricant into the chute.

[0038] The chute may further have a closing wall, which may be arranged transversely to the direction of lubricant flow and placed at the end of the lubricant flow channel formed by the guide walls and the surface of bottom. This closing wall prevents the lubricant from flowing out of the chute and thus keeps it inside the chute.

[0039] All the walls of the chute may have the same thickness. Alternatively, the walls of the chute may have different thicknesses.

[0040] The flow floor of the chute can generally be horizontal.

[0041] The floor can be composed of a first portion of floor generally horizontal going from the entrance wall to an intermediate point of the chute and a second portion of floor oblique going from this intermediate point to the closing wall, such that the closing wall is located higher than the entrance wall of the chute.

[0042] Such an oblique portion of the floor allows the lubricant to flow back towards the first generally horizontal portion of the trough and facilitates its retention in the trough, as well as its exit through the discharge orifice(s).

[0043] The chute can be made of sheet metal. Alternatively, the chute can be made of injection-molded plastic.

[0044] The chute may have a plurality of discharge ports that distribute the lubricant to different elements of the reducer. In particular, the chute may have at least one discharge port, or even at least two, especially two discharge ports, or even three, preferably four.

[0045] The chute may have a primary discharge orifice, located above the primary shaft of the reducer, so as to distribute lubricant to it.

[0046] The chute may include a secondary discharge orifice, located above a secondary shaft of the gearbox transmission stage, so as to distribute lubricant to it.

[0047] The chute may have an outlet discharge orifice, located above the output shaft of the reducer, so as to distribute lubricant to it.

[0048] The chute may include a gear discharge orifice, located above a gear of the gearbox transmission stage, so as to distribute lubricant to it.

[0049] In one embodiment, the chute may include at least one primary discharge orifice, one secondary discharge orifice and one outlet discharge orifice provided in the flow floor, these discharge orifices being surrounded by a raised rim.

[0050] The various discharge ports may have the same shape. Alternatively, the discharge ports may have different shapes. Each discharge port may have a circular shape, or another shape, for example an elliptical or oval shape.

[0051] In particular, the primary, intermediate and gear discharge ports They can be circular in shape. They can have a diameter between 2 and 5 mm, preferably between 3 and 4 mm.

[0052] The primary discharge orifice can be a circle with a diameter of 4 mm.

[0053] The secondary discharge orifice can be a circle with a diameter of 3.5 mm.

[0054] The gear discharge orifice can be a circle with a diameter of 3 mm.

[0055] The outlet discharge orifice may have an oval shape. It may have a more Large dimension L in length between 3 and 5 mm, preferably between 4 and 5 mm. It can have a smaller dimension 1 in width between 2 and 3 mm.

[0056] The various discharge ports may have equal cross-sections. Alternatively, they may have different cross-sections. The various discharge ports may have different cross-sections to distribute the lubricant flow differently to the gearbox components.

[0057] In one embodiment, the primary discharge orifice may have a larger cross-section than the secondary discharge orifice. In particular, the primary and intermediate discharge orifices may be circular, and the primary discharge orifice may have a diameter at least 14% larger than the diameter of the secondary discharge orifice.

[0058] In one embodiment, the primary discharge port may have a larger cross-section than the gear discharge port. In particular, the primary and gear discharge ports may be circular, and the primary discharge port may have a diameter at least 33% larger than the diameter of the gear discharge port.

[0059] In one embodiment, the primary discharge orifice may have a larger cross-section than the outlet discharge orifice. In particular, the primary discharge orifice may have a larger cross-section than all the other discharge orifices in the chute.

[0060] The larger section of the primary discharge orifice allows for a greater flow of lubricant to the primary shaft, which requires a greater flow of lubricant than the other shafts of the reducer to ensure its proper lubrication.

[0061] The edges of the spillway openings can be formed in one piece with the bottom surface of the flow floor.

[0062] At least some of the chute's discharge openings may be surrounded by raised edges. Preferably, all the chute's openings are surrounded by raised edges.

[0063] The height of the raised edges of the discharge orifice(s) relative to the bottom surface may be greater than or equal to three times the maximum size of the particles present in the lubricant, preferably greater than or equal to four times, or even five times the maximum size of the particles.

[0064] The height of the raised edges can be in a range of 0.5 to 5 mm, better in a range of 1 to 3 mm, even better in a range of 1 to 2 mm, for example 1.5 mm.

[0065] One or more discharge ports may be extended by a lubricant discharge column. A "discharge column" is defined as a column extending below the trough, from the discharge port towards a component of the gearbox to be lubricated. The presence of the discharge column allows for more precise delivery of the lubricant to the gearbox components, thus limiting leaks and lubricant losses.

[0066] All discharge ports may be extended by a lubricant discharge column. Alternatively, at least one port may not be extended by a discharge column.

[0067] In particular, in one embodiment, the primary discharge port may be extended by a discharge column. The secondary discharge port may be extended by a discharge column. The outlet discharge port may not be extended by a discharge column. The gear discharge port may not be extended by a discharge column.

[0068] The discharge column may be a conduit with a constant cross-section. Alternatively, the discharge column may have a cross-section that decreases as it moves away from the chute.

[0069] The flow floor of the lubrication chute may have on its bottom surface a plurality of transverse ribs, which are oriented transversely to the direction of circulation of the lubricant.

[0070] By "rib" is meant an upward projection.

[0071] Two consecutive transverse ribs, oriented transversely to the direction of lubricant flow, form between them a retention cavity capable of retaining by decantation the particles transported by the lubricant during its flow in the chute.

[0072] The transverse ribs can extend from one guide wall to another guide wall of the chute. They then extend over the entire width of the chute.

[0073] Alternatively, the transverse ribs may extend over only a portion of the trough's width. For example, the transverse ribs may extend from a guide wall to an internal wall of the trough. In particular, the trough may have two lubricant flow channels, with the transverse ribs extending over only one of the channels.

[0074] The bottom surface may have transverse ribs along its entire length. Alternatively, the bottom surface may have transverse ribs only along a portion of its length.

[0075] The transverse ribs can be straight.

[0076] The flow floor of the lubrication chute may have on its bottom surface a plurality of longitudinal ribs intersecting the transverse ribs, so as to form cavities for retaining particles present in the lubricant.

[0077] The longitudinal ribs can be oriented substantially parallel to the direction of lubricant flow. The longitudinal ribs can be oriented substantially parallel to the guide walls.

[0078] The longitudinal ribs can extend from the inlet wall to the closing wall of the chute. Alternatively, the longitudinal ribs can extend over only a portion of the chute's length.

[0079] All transverse ribs can be interlaced with longitudinal ribs. Alternatively, only some of the transverse ribs are interlaced with longitudinal ribs.

[0080] The interlacing can take the form of a grid. The cross-section of the grid of ribs can be more or less fine. All the ribs can have the same thickness. Alternatively, the transverse and longitudinal ribs can have different thicknesses.

[0081] The transverse and longitudinal ribs may have the same height. Alternatively, the transverse ribs may have a different height than the longitudinal ribs. The transverse and longitudinal ribs may be between 0.5 and 5 mm high, preferably between 1 and 3 mm, preferably between 1 and 2 mm.

[0082] The longitudinal ribs can be straight.

[0083] The transverse and longitudinal ribs can be formed in one piece with the bottom surface of the flow floor.

[0084] The lubricant flow channels may all have transverse ribs or an interlacing of transverse and longitudinal ribs. Alternatively, at least one of the flow channels may not have ribs, to accelerate the delivery of lubricant to a discharge port located in the flow channel or at its end. At least one flow channel may not have ribs and at least one flow channel may have ribs.

[0085] The retention cavities formed by the intersecting ribs allow the particles carried by the lubricant to settle as it flows through the chute. Creating retention cavities by intersecting ribs is simpler than manufacturing cavities that are offset from the chute floor. This reduces the chute's overall size and makes it more rigid, thus limiting the effects of vibrations from the gearbox operation.

[0086] The raised edges of one or more of the discharge orifices may be greater than or equal to the height of the transverse and / or longitudinal ribs, in particular equal to the height of the transverse and / or longitudinal ribs. The significant raised edges of the discharge orifices form a final barrier before discharge and thus allow the particles that would not have been previously retained by the ribs to be retained by settling.

[0087] The gutter's flow floor can extend over a single level. Alternatively, the gutter can include at least one internal wall, on either side of which the floor level is different, so that the lubricant flow channels provided by this wall are substantially offset in height.

[0088] The offset of the circulation channels makes it easier to separate the flow of lubricant entering the chute into several flows.

[0089] The difference in floor level on either side of the internal walls can be between 5 and 20 mm, better between 6 and 15 mm, better between 7 and 10 mm, for example on the order of 8.5 mm.

[0090] In particular, the chute may include an internal wall providing two circulation channels with the guide walls, and the flow floor may have a different level on either side of the internal wall so that the two lubricant circulation channels are substantially offset in height.

[0091] The chute may include several internal walls, on either side of which the floor level is different, so that the lubricant circulation channels provided by this wall are substantially offset in height.

[0092] In one embodiment, the chute may include an internal wall providing two circulation channels with the guide walls, and the flow floor may have a different level on either side of the internal wall so that the two lubricant circulation channels are substantially offset in height, the lower channel having ribs and the higher channel not having ribs, a primary discharge orifice being provided in the floor at the end of the higher channel.

[0093] The offset of the channels and the absence of ribs on the highest channel leading to the primary discharge port ensures rapid distribution and a greater flow of lubricant to the primary shaft located below the primary discharge port.

[0094] The chute may have a lower support area, in particular a rigid one, extending under the chute and designed to bear against a bearing of the gearbox. The support area bearing against the bearing helps to limit the chute's movement due to vibrations from the gearbox operation. The lower support area may be positioned at the end of a discharge column. extending from the primary discharge opening.

[0095] The chute may have an upper support area, in particular rigid, extending under the chute and intended to bear against an inner face of the gearbox housing.

[0096] The upper support area can be of a hollowed triangular shape.

[0097] The upper support area may extend below a discharge opening of the chute located above an output shaft of the reducer, the upper support area being defined by a support wall.

[0098] The lubricant exiting the discharge port located above the output shaft can thus flow towards the support wall and then towards the output shaft and a bearing carrying it.

[0099] The support wall can be inserted into a groove in the gearbox housing, leading to the bearing and the output shaft to facilitate the delivery of lubricant to it and prevent leaks.

[0100] The invention further relates, independently or in combination with the foregoing, to a lubrication channel for a rotating electrical machine gearbox, the channel comprising a flow floor having a bottom surface and one or more discharge orifices formed in the floor, the bottom surface being bordered by guide walls attached to the flow floor, so as to form at least one channel for the circulation of a lubricant towards the discharge orifice(s), and the bottom surface having a plurality of transverse ribs, which are oriented transversely to the direction of lubricant flow.

[0101] The invention also relates to a motor vehicle reducer comprising a lubrication channel as described above.

[0102] The reducer according to the invention may comprise a single transmission stage. Alternatively, it may comprise several transmission stages, for example two or three.

[0103] The invention also relates to a propulsion device for a motor vehicle, comprising a reducer as described above and one or two rotating electrical machines.

[0104] The rotating electrical machine(s) may be arranged on either side of the reducer. Each rotating electrical machine may have a shaft connected to a primary shaft of the reducer.

[0105] The invention further relates to a motor vehicle comprising a propulsion device as described above. The vehicle may have at least two drive wheels, each of the drive wheels being driven in rotation by the reduction gear, in particular by an output shaft thereof.

[0106] The drive wheels can be arranged on either side of the reducer. Each The drive wheel may have a shaft connected to an output shaft of the gearbox. The device may have a first drive wheel fixed in rotation to a first output shaft of the gearbox. The device may have a second drive wheel fixed in rotation to a second output shaft of the gearbox. Brief description of the drawings

[0107] The invention will be better understood upon reading the detailed description that follows, non-limiting examples of its embodiment, and upon examination of the attached drawing.

[0108] [Fig-1] The [Fig. 1] is a partial perspective view of a reducer according to the invention.

[0109] [Fig.2] The [Fig.2] is another partial perspective view of the reducer of the [Fig.1].

[0110] [Fig.3] The [Fig.3] is another partial perspective view of the reducer of the [Fig.1] without its casing.

[0111] [Fig.4] Fig.4 is a perspective view of the lubrication channel of the [Fig.l].

[0112] [Fig.5] The [Fig.5] is a top view of the lubrication channel of the [Fig.4].

[0113] [Fig.6] Fig.6 partially illustrates the inlet wall of the chute brification of the [Fig.4].

[0114] [Fig.7] The [Fig.7] is a partial perspective view of the reducer of the [Fig.1].

[0115] [Fig.8] Fig.8 is a partial perspective view of a support area of ​​the lubrication channel of the [Fig.4].

[0116] [Fig.9] Fig.9 partially illustrates the engagement of the support zone of the lubrication channel within the gearbox housing of [Fig.1].

[0117] [Fig. 10] [Fig. 10] is another perspective view of the engagement of a support area of ​​the lubrication channel within the gearbox housing of [Fig. 1]. Detailed description

[0118] Figures 1 to 10 illustrate a reducer 1 comprising a lubrication channel 2 attached to a wall of the housing 3 of the reducer 1.

[0119] The reducer 1 comprises a primary shaft 4, a secondary shaft 5 in a transmission stage, and an output shaft 6 carried by a bearing 7 and equipped with a toothed output wheel 8, as seen in [Fig.3].

[0120] The chute 2, illustrated separately in figures 4 to 8, is open upwards and has an L-shape.

[0121] The chute 2 includes a flow floor 9 having a bottom surface 10. It also includes two guide walls, a guide wall on the reducer side 11 and a guide wall on the machine side 12, the guide walls 11 and 12 being parallel to each other, as illustrated in [Fig.4].

[0122] The guide wall on the reducer side has a height of 9 mm.

[0123] The machine-side guide wall has a height of 22 mm.

[0124] The guide wall 12 includes centering pins 13 and configured rivets 14 to cooperate with fixing holes provided in the housing 3 of the reducer in order to allow the fixing of the chute 2 onto the housing 3.

[0125] The guide wall 11 has a flexible tongue 15 preventing movement of the chute.

[0126] The chute 2 has an inner wall 16. The inner wall 16 provides a first flow channel 17 for the lubricant with the guide wall 11. The inner wall 16 and the guide wall 12 provide a second flow channel 18 for the lubricant. The flow channel 17 is narrower than the flow channel 18.

[0127] The traffic lanes 17 and 18 extend only over part of the length of the chute and join together to form a single traffic lane 19, provided between the two guide walls 11 and 12, as seen in [Fig.5].

[0128] The chute 2 has an inlet wall 20 arranged transversely to the direction of lubricant flow in the chute. The inlet wall 20 is attached obliquely to the floor 9, as illustrated in [Fig. 6]. The inlet wall 20 includes a notch 21 arranged opposite the outlet wheel 8, as seen in [Fig. 7].

[0129] The chute 2 has a closing wall 22 arranged transversely to the direction of lubricant flow and placed at the end of the flow channel 19.

[0130] The flow floor 9 of the chute 2 consists of a first portion of floor generally horizontal 23 going from the inlet wall 20 to an intermediate point of the chute and a second portion of floor oblique 24 going from this intermediate point to the closing wall 22, as seen in [Fig.7].

[0131] In this example, the chute 2 is made of injection-molded plastic.

[0132] In the example described, as seen in [Fig.5], the chute has four discharge ports: a primary discharge port 25 located above the primary shaft 4, a secondary discharge port 26 located above the secondary shaft 5 of the transmission stage, an output discharge port 27 located above the output shaft 6 and a gear discharge port 28 located above a gear of the transmission stage.

[0133] The primary discharge orifice 25 is a circle with a diameter of 4 mm.

[0134] The secondary discharge orifice 26 is a circle with a diameter of 3.5 mm.

[0135] The gear discharge orifice 28 is a circle with a diameter of 3 mm.

[0136] The outlet discharge orifice 27 has an oval shape. It has a larger dimension L of 4.4 mm and a smaller dimension 1 of 2.6 mm.

[0137] The primary discharge orifice 25 has a larger cross-section than all the other orifices of the chute 26, 27, 28.

[0138] All the discharge openings 25, 26, 27, 28 of the chute are surrounded by a Raised rim 37. The rim elevation in this example is 1.5 mm. The rims 37 of the discharge ports 25, 26, 27, 28 are formed as a single piece with the bottom surface 10 of the flow floor 9.

[0139] The primary discharge orifice 25 is extended by a discharge column 29 whose cross-section decreases as one moves away from the chute 2. Similarly, the secondary discharge orifice 26 is extended by a discharge column 30 whose cross-section decreases as one moves away from the chute 2.

[0140] Transverse ribs 31 extend over the corridor 18, provided between the guide wall 12 and the internal wall 16.

[0141] Longitudinal ribs 32 intersect part of the transverse ribs 31, so as to form receiving cavities 33 for particles, allowing the retention by decantation of undesirable particles transported by the lubricant during its passage through the chute 2.

[0142] The longitudinal ribs 32 are parallel to the direction of flow of the lubricant in the chute 2. They are also parallel to the guide walls 11 and 12.

[0143] The transverse ribs 31 and longitudinal ribs 32 are straight. In this example, they have the same height of 1.5 mm. They are formed as a single piece with the bottom surface 10 of the flow floor 9.

[0144] The lubricant flow channel 17 does not have ribs 31, 32. This allows the lubricant to be delivered more quickly to the primary discharge port 25 located at the end of the flow channel 17.

[0145] The level of the flow floor 9 is different on either side of the internal wall 16, so that the traffic lanes 17 and 18 are offset in height. Traffic lane 17 is located higher than traffic lane 18.

[0146] The level difference between the two traffic lanes 17, 18 is 8.5 mm.

[0147] The chute 2 has a rigid lower support area 35, shown in [Fig.7], extending under the chute and coming to rest against the bearing carrying the primary shaft 4 of the reducer 1.

[0148] The lower support area 35 is positioned at the end of the discharge column 29 extending from the primary discharge orifice 25.

[0149] The chute 2 has a rigid upper support area 34 extending under the chute and bearing against the inner face of the housing 3 of the reducer 1.

[0150] The upper support area 34 is triangular in shape with a recess. It extends below the outlet discharge orifice 27.

[0151] The upper bearing area 34 is defined by a bearing wall, as illustrated in [Fig. 8]. The lubricant exiting the outlet discharge port 27 can thus flow towards the bearing wall and then into the groove 36 of the housing 3 of the reducer 1 in the direction of the output shaft 6 and the bearing 7 carrying it.

[0152] Figures 9 and 10 illustrate the engagement of the upper support area 34 in a groove 36 of the housing 3 of the reducer 1, the groove 36 leading to the bearing 7 and to the output shaft 6 to facilitate the routing of the lubricant to it and to prevent leaks.

Claims

Claims

1. Lubrication chute (2) of a reducer (1) of a rotating electrical machine, the chute (2) comprising a flow floor (9) having a bottom surface (10) and one or more discharge orifices (25, 26, 27, 28) arranged in the flow floor (9), the bottom surface (10) being bordered by guide walls (11, 12) connected to the flow floor (9), so as to form at least one circulation corridor (17, 18, 19) of a lubricant towards the discharge orifice(s) (25, 26, 27, 28), and at least one discharge orifice (25, 26, 27, 28) being surrounded by a raised rim (37).

2. Lubrication chute (2) according to the preceding claim, comprising at least one primary discharge orifice (25), one secondary discharge orifice (26) and one outlet discharge orifice (27) provided in the flow floor (9), these discharge orifices (25, 26, 27) being surrounded by a raised rim (37).

3. Lubrication chute (2) according to the preceding claim, the primary discharge orifice (25) having a larger section than those of the other discharge orifices (26, 27, 28) of the chute (2).

4. Lubrication chute (2) according to any one of the preceding claims, one or more of the discharge orifices (25, 26, 27, 28) being extended by a discharge column (29, 30) of the lubricant.

5. Lubrication chute (2) according to any one of the claims, the flow floor (9) having on its bottom surface (10) a plurality of transverse ribs (31), which are oriented transversely to the direction of circulation of the lubricant.

6. Lubrication chute (2) according to the preceding claim, the flow floor (9) having on its bottom surface (10) a plurality of longitudinal ribs (32) intersecting the transverse ribs (31), so as to form retention cavities (33) for particles present in the lubricant.

7. Lubrication chute (2) according to one of the two preceding claims, the elevation of the edges (37) of one or more or more of the discharge orifices (25, 26, 27, 28) being greater than or equal to the height of the transverse (31) and / or longitudinal (32) ribs, in particular equal to the height of the transverse (31) and / or longitudinal (32) ribs.

8. Lubrication chute (2) according to any one of the preceding claims, the chute (2) comprising at least one internal wall (16), on either side of which the level of the floor (9) is different, so that the circulation corridors (17, 18) of the lubricant formed by this wall (16) are substantially offset in height.

9. Lubrication chute (2) according to the preceding claim, at least one circulation corridor (17) not having ribs (31, 32) and at least one circulation corridor (18) having ribs (31, 32).

10. Lubrication chute (2) according to any one of the preceding claims, the chute (2) having a lower support zone (35), in particular rigid, extending under the chute (2) and intended to come into support against a bearing of the reducer (1).

11. Lubrication chute (2) according to the preceding claim, the chute (2) having an upper support zone (34) extending below a discharge orifice (27) of the chute located above an output shaft (6) of the reducer (1), the upper support zone being intended to come into contact with the internal face of the casing (3) of the reducer (1).

12. Lubrication chute (2) of a reducer (1) of a rotating electrical machine, the chute (2) comprising a flow floor (9) having a bottom surface (10) and one or more discharge orifices (25, 26, 27, 28) arranged in the floor (9), the bottom surface (10) being bordered by guide walls (11, 12) connected to the flow floor (9), so as to form at least one circulation corridor (17, 18, 19) for a lubricant towards the discharge orifice(s) (25, 26, 27, 28), and the bottom surface (10) having a plurality of transverse ribs (31), which are oriented transversely to the direction of circulation of the lubricant, the flow floor (9) having on its bottom surface (10) a plurality of longitudinal ribs (32) intersecting the transverse ribs (31), so as to form retention cavities (33) for particles present in the lubricant.

13. Reducer (1) for a motor vehicle comprising a lubrication chute (2) according to any one of the preceding claims.

14. Propulsion device for a motor vehicle, comprising a reducer (1) according to the preceding claim and a rotating electrical machine.

15. Motor vehicle comprising a propulsion device according to the re- previous claim.

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