阅读说明：本技术 混合动力变速器 (Hybrid transmission ) 是由 托马斯·施特里德尔迈尔 于 2019-08-19 设计创作，主要内容包括：本发明涉及一种用于机动车的混合动力变速器,所述混合动力变速器包括变速器壳体(1)、设置在变速器壳体(1)中的差速器(2)和设置在变速器壳体(1)中的电动机(3),其中用于润滑和/或冷却变速器部件的油在变速器壳体(1)中循环,其中油在油底壳中收集,其中差速器(2)的盘形轮(4)部分地设置在油底壳中,其中收集设备(5)构成为并且在变速器壳体(1)中设置成,使得由盘形轮(4)从油底壳中一起分离的油在收集设备(5)中收集,从而继续引导至电动机(3),使得油流向电动机(3),以至于冷却电动机(3)。(The invention relates to a hybrid transmission for a motor vehicle, comprising a transmission housing (1), a differential (2) arranged in the transmission housing (1) and an electric motor (3) arranged in the transmission housing (1), wherein oil for lubricating and/or cooling transmission components circulates in the transmission housing (1), wherein the oil is collected in an oil sump, wherein a disc wheel (4) of the differential (2) is partially arranged in the oil sump, wherein a collecting device (5) is designed and arranged in the transmission housing (1) such that the oil separated together from the oil sump by the disc wheel (4) is collected in the collecting device (5) and is conducted further to the electric motor (3) such that the oil flows to the electric motor (3) such that the electric motor (3) is cooled.)

1. A hybrid transmission for a motor vehicle, comprising a transmission housing (1), a differential (2) arranged in the transmission housing (1), and an electric motor (3) arranged in the transmission housing (1), wherein oil for lubricating and/or cooling transmission components circulates in the transmission housing (1), wherein the oil collects in an oil sump,

it is characterized in that the preparation method is characterized in that,

the disc wheels (4) of the differential (2) are arranged partially in the oil sump, wherein a collecting device (5) is designed and arranged in the transmission housing (1) in such a way that oil separated from the oil sump by the disc wheels (4) is collected in the collecting device (5) and conducted on to the electric motor (3) in such a way that the oil flows to the electric motor (3) in order to cool the electric motor (3).

2. The hybrid transmission according to claim 1,

it is characterized in that the preparation method is characterized in that,

the electric motor (3) comprises a hollow shaft rotor and the collecting device (5) is constructed and arranged in the transmission housing (1) such that the oil is conducted to the hollow shaft rotor of the electric motor (3).

3. The hybrid transmission according to claim 1,

it is characterized in that the preparation method is characterized in that,

the collecting device (5) has a first collecting region (6) at a first end of the collecting device (5) facing the disc wheel (4) and a second collecting region at a second end of the collecting device (5) opposite the first end and facing the electric motor (3).

4. The hybrid transmission according to claim 3,

it is characterized in that the preparation method is characterized in that,

the collecting device (5) is designed and arranged in the transmission housing (1) such that, in the installed position in the motor vehicle, the second collecting region is not higher than the first collecting region (6), such that the same oil level can be present in the second collecting region in normal operation as in the first collecting region (6).

5. The hybrid transmission according to claim 1,

it is characterized in that the preparation method is characterized in that,

the collecting device (5) comprises an intermediate piece (7) which is designed as a pipe, a hose or a bore.

6. The hybrid transmission according to claim 1,

it is characterized in that the preparation method is characterized in that,

the collecting device (5) has at least one first opening (8) for receiving oil from the region of the disk wheel (4) and a second opening (9) for receiving oil from the region of a clutch of the hybrid transmission.

7. The hybrid transmission according to claim 1,

it is characterized in that the preparation method is characterized in that,

the electric motor (3) comprises a motor housing (10), wherein a recess (11) is formed in the motor housing (10) in the region of the winding head of the electric motor, so that oil can pass through the recess (11) from outside the motor housing (10) to the winding head of the electric motor (3) in order to cool the winding head.

8. The hybrid transmission according to claim 1,

it is characterized in that the preparation method is characterized in that,

the motor housing (10) has a geometry on its outer side, which is designed to guide oil that has reached the motor housing (10) into the recess (11), in particular a rib (12) and/or a groove (13) and/or an oil deflector (14).

9. The hybrid transmission according to claim 1,

it is characterized in that the preparation method is characterized in that,

the transmission housing (1) has a geometry which is designed to guide oil which has reached the transmission housing (1) onto the electric motor (3), in particular into the recess (11), in particular a fastening structure (16) and/or a rib (15) of the transmission housing.

Technical Field

The invention relates to a hybrid transmission for a motor vehicle, comprising a differential and an electric motor.

Background

Transmissions for vehicles are known to have mechanical components, such as shafts and gears, in order to be able to show specific functions, for example, a transmission, in particular a dual clutch transmission. The mechanical components can form, for example, a shiftable gear pair, a clutch and/or a differential of the transmission. In recent years, it has been known that the function of a transmission of a motor vehicle is expanded or improved by using the driving force of an electric motor, whereby a so-called "hybrid transmission" has emerged. The electric motor can be designed, for example, locally close to the mechanical components of the transmission, in particular in a common transmission housing.

In order to lubricate and cool the mechanical components of the transmission, it is known to form an oil circuit in the interior of the transmission housing, wherein the oil collects in an oil sump which is usually provided in the transmission housing in the installed position at the bottom and is conducted from there to the mechanical components, for example to the clutches of the transmission which are built.

The electric motor is likewise cooled by means of oil, for which it is known that oil is fed directly from the oil sump to the electric motor by means of a feed pump, since the oil mist that may be present in the transmission housing is generally not sufficient to cool the electric motor. The same feed pump is used as the feed pump, which is also used for cooling the clutch, for example, wherein the clutch cooling and the motor cooling must then be switched by means of a valve.

Such a delivery pump for cooling the electric motor requires electrical energy almost permanently. For this purpose, a plurality of components, such as delivery pumps and valves, are required in order to achieve sufficient cooling of the electric motor.

Disclosure of Invention

The object of the present invention is to improve a hybrid transmission for a motor vehicle in this respect and in particular to propose a hybrid transmission which enables sufficient cooling of the electric motor without electrical energy, wherein the cooling should require a small number of components, in particular a small number of movable and wear-resistant components, and should therefore be cost-effective to implement.

The object is achieved by a hybrid transmission for a motor vehicle, comprising a transmission housing, a differential arranged in the transmission housing, and an electric motor arranged in the transmission housing, wherein oil for lubricating and/or cooling transmission components circulates in the transmission housing, wherein the oil is collected in an oil sump, wherein a disk wheel of the differential is arranged partially in the oil sump, wherein a collecting device is designed and arranged in the transmission housing in such a way that the oil separated together (mitcheleudern) from the oil sump by the disk wheel is collected in the collecting device and is conducted further to the electric motor in such a way that the oil flows to the electric motor, so that the electric motor is cooled.

According to the invention, the oil used for cooling the electric motor is supplied to the electric motor without the use of a pump, to be precise first from an oil sump, which can also be used for other tasks, by means of the disk wheels of the differential. The oil is carried or separated by the disk-shaped wheel into a collecting device, so that it can be collected in the collecting device and is also conducted on by the collecting device to the electric motor. By the effect of the driving force of the disc wheel and gravity, oil can flow from the collecting device to the electric motor without pump power or without additional delivery power in order to cool the electric motor sufficiently.

The invention is characterized in that the invention is described in the dependent claims, the description and the drawings.

Preferably, the electric motor comprises a hollow shaft rotor and the collecting device is designed and arranged in the transmission housing such that the oil is conducted to the hollow shaft rotor of the electric motor. The motor rotor can be supplied with oil via the hollow shaft rotor.

Preferably, the electric motor is arranged parallel to the differential, in particular to the disk wheel axis of the differential.

The collecting device preferably has a first collecting region at a first end of the collecting device facing the disk wheel, in particular for collecting the collected oil for the first time, and a second collecting region at a second end of the collecting device opposite the first end and facing the electric motor. From said second collection area, the oil can reach the electric motor, in particular fall towards the electric motor. The oil can flow, in particular fall, from the second collecting region into the hollow shaft rotor or into the front space of the hollow shaft rotor.

The collecting device is preferably designed and arranged in the transmission housing such that, in the installed position in the motor vehicle, the second collecting region is not higher than the first collecting region, so that, in normal operation, the same oil level can occur in the second collecting region as in the first collecting region. In the second collecting region, the same oil level can occur by the same effect of gravity on the oil or the principle of communicating pipes. The two ends of the collecting device can be located approximately at the same height and thus have approximately the same geodetic pressure.

The second collecting area can preferably be arranged deeper in the installation position than the first collecting area.

The collecting device can comprise an intermediate piece, in particular between the first and second collecting areas, which intermediate piece can be configured as a pipe, hose or bore. The intermediate piece can in particular have a diameter of a few mm.

The intermediate piece can be designed essentially as a tube, for example, with a circular, quadrangular or triangular cross section.

The collecting device preferably has at least one first opening for receiving oil from the region of the disk wheel and a second opening for receiving oil from the region of the clutch of the hybrid transmission.

Preferably, the motor comprises a motor housing, wherein in the motor housing at a winding head of the motor

Is formed with a recess, i.e. an opening, so that oil can pass through the recess or the opening to the winding head of the electric motor in order to cool the winding head. Such a recess can in particular improve the passive cooling of the electric motor. The oil jet can reach the winding head of the motor, in particular, via the recess.

The motor housing is preferably cylindrical and has a cylindrical lateral surface. The recess is then preferably arranged in the cylindrical side surface of the motor housing. In particular, the recess can be provided in an axial end region of the cylindrical lateral surface.

The motor housing preferably has a geometry on its outer side, which is designed to guide oil, in particular spray oil, which has reached the motor housing into the recess, in particular a rib and/or a groove and/or an oil deflector.

The transmission housing can likewise have a geometry which is designed to guide oil, in particular injection oil, which has reached the transmission housing onto the electric motor, in particular into the recess, in particular a rib and/or a fastening structure of the transmission housing, such as a flange connection.

Drawings

The invention is described below with exemplary reference to the drawings.

Fig. 1 shows a partial view of a hybrid transmission according to the invention from the side.

Fig. 2a, b show three-dimensional views of a first collecting area of a collecting device of a hybrid transmission according to the invention.

Fig. 2c, d show side views of the first collection area according to fig. 2a and 2 b.

Fig. 3 shows a three-dimensional partial view of a hybrid transmission according to the present invention.

Fig. 4 shows a partial section view of a hybrid transmission according to the invention.

Fig. 5 shows a view of the hybrid transmission according to the invention from the opposite side compared to fig. 2.

Fig. 6a, b, c show schematic views of an electric motor of a hybrid transmission according to the invention.

Fig. 7a to e show schematic diagrams of an electric motor of a hybrid transmission according to the invention in a transmission housing.

Fig. 8a, b show a schematic representation of an electric motor of a hybrid transmission according to another embodiment of the invention.

Fig. 9a, b show a schematic representation of an electric motor of a hybrid transmission according to another embodiment of the invention.

Fig. 10a to e show schematic views of an electric motor of a hybrid transmission according to another embodiment of the present invention.

Detailed Description

Fig. 1 shows a hybrid transmission according to the invention for a motor vehicle from the side. The hybrid transmission comprises a transmission housing 1, a differential 2 with a disk wheel 4 arranged in the transmission housing 1, and an electric motor 3 arranged in the transmission housing 1. The motor 3 and the disc wheel 4 have axes parallel to each other.

In the transmission housing 1, oil collects in an oil pan, not shown. The disk wheels 4 of the differential 2 are arranged partially in the oil sump in such a way that they can entrain oil from the oil sump and separate it upwards. The collecting device 5 is arranged in the transmission housing 1 above the disk wheels 4 and laterally offset with respect to the disk wheels, so that the oil separated together by the disk wheels 4 from the oil sump is collected in the collecting device 5, more precisely in a first collecting region 6 of the collecting device 5, and is conducted by the collecting device 5 on to the electric motor 3 in order to cool the electric motor 3.

The electric motor 3 comprises a hollow shaft rotor and the collecting device 5 directs the oil to the hollow shaft rotor of the electric motor 3 in order to feed the motor rotor with oil through the hollow shaft rotor.

The collecting device 5 has a first collecting area 6 at a first end of the collecting device 5 facing the disc wheel 4, which first collecting area is shown in detail in fig. 2. Furthermore, the collecting device 5 has a second collecting region at a second end of the collecting device 5 opposite the first end and facing the motor 3. From the second collecting region, the oil can flow, in particular fall, into the hollow shaft rotor or into the front space of the hollow shaft rotor.

The depth, the precise embodiment and the inclined position of the collecting device 5, in particular its first collecting region 6, serve to optimally collect and guide the oil further to the electric motor 3 and at the same time avoid backflow of the oil in the inclined position, for example on a strong downhill slope.

The collecting device 5 is designed and arranged in the transmission housing 1 in such a way that, in the installed position in the motor vehicle, the second collecting region is deeper than the first collecting region 6, so that the same oil level can occur in the second collecting region in normal operation as in the first collecting region 6.

The collecting device 5 comprises an intermediate piece 7 between the first collecting area 6 and the second collecting area, which intermediate piece can be constructed as a pipe, hose or hole and which intermediate piece can have a diameter of a few mm, see fig. 5. The intermediate piece 7 can be formed by a long hole through the thickened transmission housing 1.

The first collecting area 6 of the collecting device 5 of the hybrid transmission according to the invention is shown in more detail in fig. 2a, b, c and d.

The collecting device 5 has, at its first collecting region 6, a first opening 8 for receiving oil, in particular for injecting oil, from the region of the disk wheels 4 and a second opening 9 for receiving oil, in particular for injecting oil, from the region of at least one clutch of a hybrid transmission, for example of a dual clutch transmission.

The outlet 17 of the first collecting region 6 can be connected to the electric motor 3 via an internally located part, for example a hose or pipe, or via a long bore through the thickened transmission housing 1.

Possible inflows and outflows of oil into the first collecting region 6 are shown in fig. 2a by thick arrows.

Fig. 3 shows a three-dimensional partial view of the same hybrid transmission according to the invention of fig. 1, and fig. 4 shows a sectional view of a part of the hybrid transmission from above.

Fig. 5 shows the hybrid transmission of fig. 1 as viewed from the opposite side. The intermediate piece 7 of the collecting device 5 extends slightly obliquely downwards to the electric motor 3, so that an outlet over the hollow-shaft rotor of the electric motor 3 is possible.

Fig. 6 to 10 show the design of the motor housing 10 and the transmission housing 1, which are used to improve the passive cooling of the electric motor 3. The direction of movement of the oil, in particular of the injected oil, is indicated here in part by an arrow.

Since thermal hot spots, i.e. the winding heads of the electric motor 3, are to be cooled, the motor housing 10, as shown in fig. 6b and c, has radial recesses at the level of the winding heads, through which cooling oil emerging from the differential 2 and the other shafts reaches the electric motor 3. All shafts are oriented coaxially with the rotor of the electric motor 3, so that the oil spray of the differential 2 and of other transmission components radially impinges on its housing 10 at least on the facing side of the electric motor 3.

As shown in fig. 7a, b, c, d and e, the transmission housing 1 has a geometry which is designed to guide oil which has reached the transmission housing 1 to the electric motor 3, in particular in order to guide the oil in a targeted manner into the recess 11 to the winding head. For this purpose, a rib 15, for example a baffle, is formed on the transmission housing 1, which rib can have one or more recesses above the recess 11 in the installed position, so that oil flows along the rib 15 or the plate to the recess 11. The falling oil droplets 18 are schematically shown.

As shown in fig. 7e, a fastening structure 16 of the transmission housing, such as a flange region or a screw connection, can also be used as an oil deflector or rib.

As shown in fig. 8a and b, the motor housing 10 has a geometry on its outer side, which is designed to guide oil that has reached the motor housing 10 into the recess 11. Such a geometry can be, for example, a rib 12 running obliquely to the recess 11 and/or a groove 13 running around the motor housing 10, which has a bore in the groove 13 as a recess 11 for the oil to flow through.

As shown in fig. 9a and b and 10a to e, an oil deflector 14 can also be used at the motor housing 10, in particular at the side of the electric motor 3 facing away from the differential 2, in order to guide the oil into the recess 11. Additionally, an oil guide plate hole 19 can be provided at the oil guide plate 14, so that oil can also fall onto the electric motor 3 at the rear side of the oil guide plate 14.

List of reference numerals:

1 Transmission housing

2 differential mechanism

3 electric motor

4 disc wheel

5 collecting device

6 first collection area

7 intermediate member

8 first opening

9 second opening

10 motor casing

11 hollow part

12 Ribs

13 groove

14 oil guide plate

15 Ribs

16 fixed structure

17 outlet port

18 oil drop

19 oil guide plate hole