Speed reducer for a powertrain
A speed reducer for a powertrain includes, in an orthogonal frame of reference: a reduction device including a first shaft extending along a first axis of rotation and coaxially carrying a first toothed wheel, and a housing with a hollow shape including a base and a peripheral wall integrally formed with the base, the peripheral wall partially surrounding the reduction device. Also included is a lubricant receiving and distributing collector arranged in the housing between the peripheral wall and the first axis of rotation. The lubricant receiving and distributing collector includes a first reservoir and a second reservoir which are arranged on either side of the first toothed wheel.
1 . Speed reducer for a powertrain, comprising, in an orthogonal frame of reference:
a reduction device comprising a first shaft extending along a first axis of rotation and coaxially carrying a first toothed wheel,
a housing with a hollow shape comprising a base and a peripheral wall integrally formed with the base, the peripheral wall partially surrounding the reduction device,
a lubricant receiving and distributing collector arranged in the housing between the peripheral wall and the first axis of rotation,
wherein the lubricant receiving and distributing collector comprises a first reservoir and a second reservoir which are arranged on either side of the first toothed wheel,
wherein the first reservoir and the second reservoir are connected via a first gutter conveying a lubricant from the first reservoir to the second reservoir under the effect of gravity, and
wherein the first reservoir and the second reservoir are connected via a second gutter conveying the lubricant from the first reservoir to the second reservoir under the effect of gravity, so that the first reservoir, the second reservoir, the first gutter and the second gutter form a common receptacle able to receive the lubricant projected within the housing.
2 . Speed reducer according to claim 1 , wherein the outer periphery of the first toothed wheel extends radially beyond the outer perimeter of the first reservoir or the second reservoir.
3 . Speed reducer according to claim 2 , wherein at least the first reservoir comprises a cylindrical surface portion concentric with the first axis of rotation.
4 . Speed reducer according to claim 2 , wherein the peripheral wall of the housing comprises a cylindrical surface coaxial with the first axis of rotation that partially surrounds the outer periphery of the first toothed wheel.
5 . Speed reducer according to claim 2 , wherein the first reservoir and the second reservoir are arranged on either side of a first geometric plane passing through the first axis of rotation and a second axis of the orthogonal frame of reference perpendicular to the first axis of rotation, the first geometric plane passing through the peripheral wall of the housing in a direction substantially perpendicular thereto.
6 . Speed reducer according to claim 5 , wherein the first reservoir comprises a first bottom and the second reservoir comprises a second bottom, the first bottom being offset axially with respect to the second bottom along a second axis.
7 . Speed reducer according to claim 1 , wherein at least the first reservoir comprises a cylindrical surface portion concentric with the first axis of rotation.
8 . Speed reducer according to claim 1 , wherein the peripheral wall of the housing comprises a cylindrical surface coaxial with the first axis of rotation that partially surrounds the outer periphery of the first toothed wheel.
9 . Speed reducer according to claim 1 , wherein the first reservoir and the second reservoir are arranged on either side of a first geometric plane passing through the first axis of rotation and a second axis of the orthogonal frame of reference perpendicular to the first axis of rotation, the first geometric plane passing through the peripheral wall of the housing in a direction substantially perpendicular thereto.
10 . Speed reducer according to claim 9 , wherein the first reservoir comprises a first bottom and a second reservoir comprises a second bottom, the first bottom being offset axially with respect to the second bottom along the second axis.
11 . Speed reducer according to claim 1 , wherein the first gutter and the second gutter are spaced axially along the first axis of rotation and arranged on either side of a central opening to allow the lubricant projections coming from the toothing of the first toothed wheel to pass through.
12 . Speed reducer according to claim 1 , wherein the first toothed wheel rotates about the first axis of rotation in a preferred direction, the first reservoir facing the first toothed wheel so as to receive a lubricant projected by the toothing.
13 . Speed reducer according to claim 1 , wherein the reduction device comprises a second shaft extending along a second axis of rotation and coaxially carrying a differential input toothed wheel, the differential input toothed wheel being partially immersed in a lubricant, and a deflector arranged in the housing comprising a ramp able to guide the lubricant in a direction of the first toothed wheel.
14 . Speed reducer according to claim 13 , wherein the ramp comprises a cylindrical lubricant guide surface which is concentric with the differential input toothed wheel.
15 . Speed reducer according to claim 14 , wherein the deflector is manufactured from a part separate from the housing and wherein the ramp comprises a flow sector located at an end of the ramp and housed in a hollowed-out flank of the first toothed wheel.
16 . Speed reducer according to claim 1 , wherein a closure cover is fitted to the housing so as to form a closed enclosure around the reduction device, the lubricant receiving and distributing collector being held in position partially by the housing and partially by the closure cover.
17 . Speed reducer according to claim 1 , wherein the first reservoir and the second reservoir are connected via the first gutter and the second gutter which are separate and which distribute the lubricant indiscriminately between the first reservoir and the second reservoir under the effect of gravity, so that the first reservoir, the second reservoir, the first gutter and the second gutter form the common receptacle able to receive the lubricant projected within the housing.
18 . Speed reducer for a powertrain, comprising, in an orthogonal frame of reference:
a reduction device comprising a first shaft extending along a first axis of rotation and coaxially carrying a first toothed wheel,
a housing with a hollow shape comprising a base and a peripheral wall integrally formed with the base, the peripheral wall partially surrounding the reduction device,
a lubricant receiving and distributing collector arranged in the housing between the peripheral wall and the first axis of rotation,
wherein the lubricant receiving and distributing collector comprises a first reservoir and a second reservoir which are arranged on either side of the first toothed wheel, and
wherein the first reservoir and the second reservoir are connected via a first gutter and a second gutter which are separate and which distribute the lubricant indiscriminately between the first reservoir and the second reservoir under the effect of gravity, so that the first reservoir, the second reservoir, the first gutter and the second gutter form a common receptacle able to receive a lubricant projected within the housing.
19 . Speed reducer for a powertrain, comprising, in an orthogonal frame of reference:
a reduction device comprising a first shaft extending along a first axis of rotation and coaxially carrying a first toothed wheel,
a housing with a hollow shape comprising a base and a peripheral wall integrally formed with the base, the peripheral wall partially surrounding the reduction device,
a lubricant receiving and distributing collector arranged in the housing between the peripheral wall and the first axis of rotation,
wherein the lubricant receiving and distributing collector comprises a first reservoir and a second reservoir which are arranged on either side of the first toothed wheel,
wherein the lubricant receiving and distributing collector comprises at least one bottom, an outer perimeter and a central opening arranged between the first reservoir and the second reservoir, into which opening the first toothed wheel is partially inserted so as to be able to project lubricant from the toothing towards the bottom of the lubricant receiving and distributing collector, the bottom of the lubricant receiving and distributing collector completely surrounding the central opening, and
wherein an inner perimeter of the central opening delimits inner walls of the lubricant receiving and distributing collector.