DE102020104725A1 - Connection plate and drive unit with such a connection plate - Google Patents

Abstract

The invention relates to a connecting plate (4) for connecting an electric drive motor (1) to a transmission (3), the connecting plate (4) having at least one opening (12, 13) for the passage of a shaft (21, 22), the Connecting plate (4) has a base support (5) and a damping material (23) connected to the base support (5), and wherein in the at least one opening (12, 13) a bearing element (15) for supporting at least one shaft (21, 22 The invention also relates to a drive unit with an electric drive motor (1) and a gear (3), the electric drive motor (1) and the gear (3) being connected to one another via such a connecting plate (4).

Description

The invention relates to a connecting plate for connecting an electric drive motor to a gearbox and to a drive unit with an electric drive motor and a gearbox, which are connected to one another via such a connecting plate according to the preamble of the independent claims.

In the case of gearboxes, internal vibration excitations lead to system-related noise generation. A main source of noise are tooth flanks of meshing gears that roll under load, as the forces and moments that occur during rolling cause vibrations that are perceived by a machine user, especially the occupants of the motor vehicle, as gear rattle or howling. In addition, noises can also arise at other points of the transmission, for example when the rolling elements roll in the rolling bearings. These noises generated in the gearbox are transmitted as structure-borne noise via gear wheels, gear shafts and bearings to the gearbox housing and from there released as air-borne noise to the environment or passed on to the machine structure in the form of structure-borne noise.

Structural components that are in direct force flow with the gearbox housing are decisive for the transmission of noises. Simulative methods can be used to determine which components are most critical with regard to noise transmission. For this purpose, for example, an energy flow analysis can be carried out. The structural components include, in particular, bearing plates, bearing shields, receptacles for switching elements or ring gears.

In order to reduce the noise development in a transmission, measures can be taken to minimize the vibration excitations, which are referred to as primary measures. Furthermore, secondary measures can be taken in order to reduce the transmission of sound waves to the transmission housing or an emission of sound waves from the transmission housing of the transmission. The primary measures include, for example, optimizing the course of the stiffness of the tooth flanks and reducing the deviations between the tooth flanks. However, these usually lead to a significant increase in production costs, since these measures are associated with lower production tolerances and the associated higher processing times for the components. In addition, these measures cannot contribute to noise minimization in all load cases, so that these primary measures are generally not suitable as the sole measures for noise reduction.

The secondary measures with which the transmission of sound waves to the housing and the emission of sound waves are to be minimized include various types of insulation and damping measures as well as measures aimed at changing the natural vibration behavior of the components that are significantly involved in structure-borne sound development and structure-borne sound conduction. One way of reducing noise is to isolate the bearing points from the gearbox housing. However, such decoupling and damping measures bring about a significant reduction in the rigidity at the connection points in the radial direction. The lowering of the rigidity at the connection points leads to an increased displacement of the shafts when torque is transmitted in the gearbox. In the case of spur gears, this has a significant impact on the contact pattern of the gearing. This can lead to a minimization of the durability and also to a higher stimulation, whereby the sound-absorbing effect is weakened. Due to the reduced stiffness at the insulating connection point, the forces arising from the power transmission will be increasingly supported on other bearing points or connection points. Thus, a large part of the structure-borne noise transmission is diverted to these other storage or connection points.

From the DE 10 2014 118 553 A1 a rolling bearing for a vehicle transmission is known which has an inner ring, an outer ring and a plurality of rolling elements arranged between the inner ring and the outer ring. In this case, a damping layer consisting of a vibration-damping material is formed on the roller bearing, which is arranged in the outer ring, the inner ring or in an adapter ring surrounding the roller bearing on its outer circumference, that the outer ring, the inner ring or the adapter ring is separated from each other by the damping layer independent parts is divided.

the EP 2 659 573 B1 discloses a bearing unit for supporting a shaft which connects an electric drive motor to a gearbox. The shaft is rotatably mounted in a housing of the electric drive motor. The bearing unit comprises a receiving body for receiving a roller bearing, the receiving body being received in the housing of the electric drive motor and enabling the shaft to be rotatably supported.

The disadvantage of the known solutions, however, is that the isolation of the transmission components in the power flow leads to a reduction in rigidity. This can increase the load on the gears in the transmission, which reduces the durability and can increase the excitation of vibrations in the transmission.

The object of the invention is to minimize the development of noise in a drive train of a motor vehicle which connects an electric drive motor to a transmission of the motor vehicle and to overcome the disadvantages known from the prior art.

According to the invention, this object is achieved by a connecting plate for connecting an electric drive motor to a gearbox, the connecting plate having at least one opening for the passage of a shaft, the connecting plate having a base support and a damping material connected to the base support, and wherein the at least one opening has a Bearing element for supporting at least one shaft is added, solved.

The basic idea of the invention is therefore to be seen in the fact that the connection plate is structurally formed from a load-bearing base carrier, which is provided at least in sections with a damping layer in order to reduce the structure-borne sound transmission. The load-bearing base carrier provided makes it possible, first of all, to absorb the reaction forces that occur during the movement of the transmission. Second, the vibrations, which are caused by the absorption of the forces occurring during the movement of the gearbox, are specifically dampened by the damping layer. The connecting plate thus has two tasks, namely to absorb the forces while at the same time damping the vibrations.

The base support is connected to the applied damping layer. The base support and the damping layer are deformed accordingly when a load is applied. By choosing a vibration-damping material, the vibrations that occur during operation of the drive train can be effectively dampened. Due to the higher modulus of elasticity of the baseplate, the baseplate can absorb higher forces, while the damping layer is deliberately easier to deform due to the smaller modulus of elasticity and can therefore execute larger movements when vibrations are transmitted, which is the physical cause of the damping of the Vibrations are. Depending on the design of the damping element, however, it can also perform the same or similar movements as the base plate.

The features listed in the dependent claims allow advantageous improvements and further developments of the connecting plate listed in the independent claim.

In a preferred embodiment of the connection plate, it is provided that the base support has a first fastening section on a first end face of the connection plate, on which the connection plate can be connected to a housing of the electric drive motor and has a second fastening section on a second end face opposite the first end face which the connecting plate can be connected to a gear housing. This enables a stable connection to be established between the housing of the electric drive motor and the transmission housing. A high mechanical strength can thus be achieved in order to ensure stable mounting of the motor shaft and / or the transmission input shaft.

In a preferred embodiment of the invention it is provided that the base support is formed from a metallic material. As a result, the base plate can be manufactured particularly simply and inexpensively as a stamped or deep-drawn part. A metallic base plate has a correspondingly higher modulus of elasticity and a higher flexural strength compared to a damping layer made of a polymer material.

A structurally particularly simple embodiment of the damping layer can be implemented in that the damping layer is formed by a plastic layer. Plastic is a very inexpensive material and can be connected very easily to the base support by overmoulding the base support with the plastic, or by otherwise connecting the damping layer made of plastic to the base support. The damping layer can be formed from a polymer material, for example. A polymer material, in particular a thermosetting plastic or a thermoplastic, has a highly damping effect, so that the structure-borne sound is particularly strongly damped. The term plastic layer should not only be understood as a thin plastic layer, the plastic layer can also be realized by a plastic structure or a plastic construction.

In a preferred embodiment of the connecting plate it is provided that the connecting plate has a first bearing opening and a second bearing opening for mounting axially parallel shafts. Thus, in addition to the motor shaft or the transmission input shaft, a further shaft can be mounted in the connecting plate. In particular, this can be an axle shaft for connection of the transmission with a driven wheel of a motor vehicle.

In a preferred embodiment of the invention it is provided that the damping layer is connected to the base support by means of a material connection, in particular by means of an injection molding process or by gluing the base support. As a result, the additional costs in production and assembly can be kept low and efficient vibration damping can be implemented on the connecting plate.

In an advantageous further development of the connection plate, it is provided that an electrically conductive strand, in particular a cable or a guide element, is introduced into the damping material. This allows additional functions to be integrated into the connection plate in a simple manner. In particular, electrically conductive cables can be electrically isolated by the damping material, so that no further isolation from the carrier element is necessary.

Alternatively or additionally, it is advantageously provided that a channel for conveying a liquid, in particular a hydraulic oil or a cooling liquid, is introduced into the damping material of the connecting plate. As a result, further functionalities can be easily and inexpensively integrated into the connection plate.

It is particularly preferred if the electrically conductive strand connects a sensor to a transmission element. A preferred option for integrating an additional function in the connection plate is to integrate a sensor.

In an advantageous embodiment of the connecting plate, it is provided that the connecting plate comprises a sensor, in particular an acceleration sensor or a temperature sensor, the sensor resting against the bearing element or an end section of the base support facing the bearing element. The vibrations in the drive train can be recorded by an acceleration sensor, whereby critical excitation states with regard to the development of noise can be recognized and reduced again by a corresponding control of the electric drive motor. It can also be helpful to control the electric drive motor to know a temperature of the drive shaft.

In an advantageous further development of the connecting plate, it is provided that the bearing element is designed as a composite hub. A composite hub is understood to mean a hub made of a composite of several different materials, in particular a combination of a metallic material and a polymer material. A composite hub can reduce the weight of the connecting plate. Furthermore, a composite hub can combine the positive properties of different materials, so that the high mechanical rigidity of a metallic material can be combined with the good vibration damping of a polymer material.

In a preferred embodiment of the bearing element, it is provided that a receiving section for receiving the base support is formed on the bearing element. This enables a simple non-positive connection to be established between the bearing element and the connecting plate. It is preferably provided that the bearing element is pressed into a metallic base carrier of the connecting plate.

It is particularly preferred if the receiving section is formed on a radially outer circumferential surface of the bearing element. This enables a particularly simple connection by simply joining the base support and the bearing element.

In a preferred embodiment of the bearing element it is provided that a first bearing seat and a second bearing seat are formed on a radially inner lateral surface of the bearing element. As a result, both the motor shaft and the transmission input shaft or a component connected to the transmission input shaft or a component arranged on the transmission input shaft can be supported in the bearing element. By accommodating both shafts in the bearing element, a high degree of accuracy with regard to the coaxiality of the shafts can be achieved, as a result of which transmission losses can be minimized.

Another aspect of the invention relates to a drive unit with an electric drive motor and a gear, the electric drive motor and the gear being connected to one another via such a connecting plate. Such a connecting plate enables efficient vibration damping between the electric drive motor and the transmission. In particular, a transmission chain for the transmission of structure-borne noise can be interrupted, so that the development of noise can be minimized. Alternatively or additionally, components that are excited to vibrate can be calmed by the damping material, which minimizes the development of noise.

In a preferred embodiment of the drive unit it is provided that a motor shaft of the electric drive motor in the Bearing element is rotatably mounted. This enables the motor shaft to be supported, whereby the vibrations that occur do not contribute directly to the excitation of the housing of the electric drive motor or the gear housing. The transmission path for the development of noise can thus be interrupted, which minimizes the operating noise of the drive unit.

According to an advantageous further development of the drive unit, it is provided that the motor shaft is arranged concentrically to a transmission input shaft, with an end section of the motor shaft being received in the transmission input shaft, with a carrier element, in particular a planet carrier of a planetary gear, being arranged on the transmission input shaft, which is rotatable in the bearing element is stored. As a result, a compact and optimized mounting of the motor shaft and the transmission input shaft or the carrier element can be realized, in particular the motor shaft and the transmission input shaft or the motor shaft and the carrier element can be centered with respect to one another by the bearing element, whereby the losses in the drive train can be minimized.

The various embodiments of the invention mentioned in this application can be advantageously combined with one another, unless stated otherwise in the individual case.

• 1: eine aus dem Stand der Technik bekannte Antriebseinheit mit einem elektrischen Antriebsmotor und einem Getriebe;
• 2: ein Ausführungsbeispiel einer Antriebseinheit mit einem elektrischen Antriebsmotor und einem Getriebe, wobei der elektrische Antriebsmotor und das Getriebe durch eine erfindungsgemäße Verbindungsplatte verbunden sind;
• 3: eine Ansicht einer erfindungsgemäßen Verbindungsplatte von der Getriebeseite;
• 4: eine Ansicht einer erfindungsgemäßen Verbindungsplatte von der Seite des elektrischen Antriebsmotors; und
• 5: ein Lagerelement zur Lagerung der Motorwelle und der Getriebeeingangswelle, welches in einer Öffnung der Verbindungsplatte angeordnet ist.

The invention is explained below on the basis of preferred embodiments with reference to the accompanying figures. The same components or components with the same function are identified with the same reference symbols. Show:

• 1 : a drive unit known from the prior art with an electric drive motor and a gearbox;
• 2 : an embodiment of a drive unit with an electric drive motor and a gear, wherein the electric drive motor and the gear are connected by a connecting plate according to the invention;
• 3 : a view of a connecting plate according to the invention from the transmission side;
• 4th : a view of a connecting plate according to the invention from the side of the electric drive motor; and
• 5 : a bearing element for bearing the motor shaft and the transmission input shaft, which is arranged in an opening in the connecting plate.

1 shows a drive unit known from the prior art with an electric drive motor 1 and a gearbox 3 . In one housing 2 of the electric drive motor 1 is a motor shaft 17th arranged, which is coaxial with a transmission input shaft 18th of the transmission 3 runs and the drive torque of the electric drive motor 1 on the gearbox 3 transmits. There is a gear housing 14th of the transmission 3 directly on the housing 2 of the electric drive motor 1 attached. The transmission input shaft 18th stands on a toothed section 30th with a gear 29 , in particular with a planet gear of a planetary gear in engagement, which on a carrier element 31 is stored. The transmission input shaft 18th is through a roller bearing 32 rotatable in the carrier element 31 stored. The motor shaft 17th and the extension of the motor shaft 17th gearbox input shaft arranged coaxially with this 18th are also called the first wave 21 designated. Axially parallel to this first wave 21 is a second wave 22nd arranged, which with a first shaft segment 19th in the case 2 of the electric drive motor 1 and with a second shaft segment in the gear housing 14th runs. This second wave 22nd can be rotated into the corresponding housing by means of two roller bearings 2 , 14th stored.

In 2 is a preferred embodiment for a drive unit according to the invention with an electric drive motor 1 and a gearbox 3 shown in a schematic sectional drawing, which by a connecting plate according to the invention 4th are connected to each other. The electric drive motor 1 includes a housing 2 and a motor shaft 17th . In one housing 2 of the electric drive motor 1 is a motor shaft 17th arranged, which is coaxial with a transmission input shaft 18th of the transmission 3 runs and the drive torque of the electric drive motor 1 on the gearbox 3 transmits. Here is the transmission input shaft 18th in extension of the motor shaft 17th along a common central axis 37 arranged, with an end portion of the motor shaft 17th in an end section of the transmission input shaft designed as a hollow shaft 18th is recorded. The motor shaft 17th is by means of a roller bearing 6th rotatable in the connecting plate 4th stored. This is in a warehouse opening 12th in the connecting plate 4th a bearing element 15th recorded. On the case 2 of the electric drive motor 1 is a first flange 25th formed over which the housing 2 via fasteners 26th , in particular by means of screws or rivets, with a base support 5 the connecting plate 4th connected is.

The gear 3 includes a gear housing 14th and a transmission input shaft 18th . The transmission input shaft 18th is along a central axis 37 coaxial with the motor shaft 17th and in Extension of this arranged. The transmission input shaft 18th has a toothed section 30th on which a gear 29 with the transmission input shaft 18th is engaged. The transmission input shaft 18th is by means of a roller bearing 32 in a carrier element 31 , in particular in a planet carrier of a planetary gear, which in turn can be rotated in the gear housing by means of a further roller bearing 14th is stored. The carrier element 31 is by means of a roller bearing 24 rotatable in the bearing element 15th stored. The gearbox 14th has a second flange 27 on which one with the basic carrier 5 the connecting plate 4th via fasteners 28 , in particular via screws or rivets, is connected to one another.

The connecting plate 4th comprises a preferably metallic base support 5 on which a damping material 23 is attached. The connecting plate 4th has a first bearing opening in which a bearing element 15th is inserted or pressed in. The motor shaft is in the bearing element 17th and that on the transmission input shaft 18th arranged carrier element 31 rotatably mounted. The combination of motor shaft 17th and transmission input shaft 18th is also called the first wave 21 designated. The connecting plate 4th also has a second bearing opening 13th on through which a second wave 22nd is led. This is at the second bearing opening 13th a mission 33 provided to the second shaft 22nd or one with the second wave 22nd to store connected component rotatably. The second wave 22nd has a first shaft segment 19th on which through the housing 2 of the electric drive motor 1 runs and a second shaft segment 20th , which through the gear housing 14th runs. One with the second wave 22nd The non-rotatably connected gear is by means of a roller bearing 34 rotatable on the insert 33 stored.

The connecting plate 5 also has a sensor 7th , in particular an acceleration sensor or a temperature sensor, which on the bearing element 15th is arranged and in particular vibrations on the bearing element 15th recorded. The sensor 7th is via a conductive strand 10 , especially through a cable 9 or a guide element embedded in the damping material 8th with a radial outside on the connecting plate 4th arranged transmission element 11 tied together. The transmission element 11 processes the signals from the sensor 7th , provides a power supply for the sensor 7th and forwards the signals to a control unit (not shown). Due to the composite construction of the connecting plate 4th with a metallic base support 5 and a damping material 23 can be the weight for the connecting plate 4th be reduced. Alternatively, the transmission element 11 also a plug for making electrical contact with the connecting plate 5 be.

In 3 is an embodiment of the connecting plate 4th with a preferably metallic base support 5 and a damping material provided thereon 23 to recognize. Alternatively, the base support 5 can also be made from a fiber composite material, in particular from a plastic reinforced with carbon fibers. The basic carrier 5 includes the necessary storage and fastening points for fastening the connecting plate 1 even on a gearbox 14th and a housing 2 of the electric drive motor 1 . If the storage concerns moving and in particular rotating parts such as shafts, the physical connection in the connecting plate 4th Structure-borne sound waves initiated. This transmission or propagation of the structure-borne sound waves is caused by the damping material 23 attenuated, which in turn reduces the noise level of the transmission 3 is reduced overall. The damping material 23 can preferably be formed in the form of an injection-molded plastic layer from a highly damping polymer plastic, preferably from a thermoset. The damping material 23 can in particular cohesively by molding on or additionally or alternatively also by a form fit with the base support 5 be connected.

The basic carrier 5 is preferably a metallic component which can also be inexpensively formed in large numbers as a stamped and / or deep-drawn part. The metallic base carrier 5 has a greater modulus of elasticity than the damping material 23 and serves to take up the load. The connecting plate 4th has a first bearing opening 12th and another warehouse opening 13th for mounting axially parallel shafts 22nd , 23 on. At the first warehouse opening 12th is a sensor 7th arranged, which has a conductive strand 10 , especially over a cable 9 or an electrical conductor 8th with a transmission element 11 connected is. Therefore the fastening lugs, fastening openings and the bearing points 12th , 13th consciously on the basic carrier 5 arranged so that the reaction forces required for holding and mounting the components from the base support 2 be included. The damping material 23 can deliberately be arranged in such a way that it is not mechanically stressed and has a lower modulus of elasticity, which increases the damping of structure-borne sound vibrations. In 3 are the cable ducts in which the conductive strand 10 , especially the cable 9 runs, shown visibly. These cable ducts are covered by a further plastic layer (not shown) after the conductive strand has been inserted 10 or the cable 9 closed by another layer of plastic. Alternatively or in addition, channels for conveying a liquid, in particular a hydraulic oil, can also be introduced into the connecting plate.

The connecting plate 4th includes one to the installation geometry in the transmission 3 adapted outer contour, so that it is, among other things, non-rotatably in the gearbox 3 can support. The connecting plate further comprises 4th several mounting holes 4th for fastening the connecting plate 4th on the housings 2 , 14th of gearbox 3 and electric drive motor 1 or also for fastening further components arranged thereon, for example by means of screws passed through. The connecting plate further comprises 4th a first warehouse opening 12th for mounting a motor shaft 17th or a transmission input shaft 18th .

The connecting plate 4th is characterized by a composite construction, which by the base carrier 5 with the damping material provided on it 23 is formed. The damping material 23 can be on one side as well as on both sides of the base support 2 be provided. Furthermore, the damping material 23 be dimensioned in terms of extension, external geometry, arrangement and thickness in such a way that, as a result, sections of the base support that vibrate particularly strongly in a targeted manner 5 be dampened. The basic carrier 5 in designated areas e.g. B. to reduce weight also be filled with a thinner wall thickness, which then through the damping material 23 is specifically thickened or reinforced, so that the lower rigidity of the base support 5 can be at least partially compensated in the area of the thinner wall thickness. Furthermore, the base support 5 also specifically designed to create free spaces with a thinner wall thickness, so that the damping material 23 on the connecting plate 4th can be arranged without thereby reducing the maximum wall thickness of the connecting plate 4th is enlarged. 3 shows the end face of the connecting plate facing the transmission 4th .

Besides the advantage of the damping material 23 in the noise reduction can through the damping material 23 also the rigidity of the connecting plate 4th be optimized overall in terms of optimal force absorption and transmission.

In 4th is the connecting plate 4th in a view of the electric drive motor 1 facing end face shown. Here is the metallic base carrier 5 and the damping material 23 to recognize. Furthermore, the two bearing openings 12th , 13th as well as the transmission element 11 for the in 3 shown sensor 7th to see.

In 5 is a bearing element 15th for use in such a drive unit, in particular in such a connecting plate 4th shown. The bearing element 15th is preferably rotationally symmetrical to a central axis 37 executed. The bearing element 15th has a receiving area on its radially outer lateral surface 38 to accommodate the base support 5 on. The bearing element 15th also has a first bearing seat on its radially inner surface 35 for the rotatable mounting of one on the transmission input shaft 18th recorded and relative to the transmission input shaft 18th rotatable carrier element 31 on. Alternatively, the transmission input shaft can also be used 18th at the first bearing seat 35 be rotatably mounted. The outer ring of the rolling bearing becomes 24 in the warehouse 35 recorded. The bearing element 15th also has a second bearing seat 36 on which a roller bearing 6th for the rotatable mounting of the motor shaft 17th can be included. There is an outer ring for the rotatable mounting of the motor shaft 17th used rolling bearing 6th at the second bearing seat 36 at. The bearing element 15th can be executed in a composite construction, whereby the mechanically highly stressed parts of the bearing element 15th are made of a metallic material and lightly stressed areas are made of a polymer material. This can reduce the weight for the bearing element 15th to reduce.

List of reference symbols

1

Drive motor

2

casing

3

transmission

4th

Connecting plate

5

Basic carrier

6th

first camp

7th

sensor

8th

Guiding element

9

cable

10

conductive strand

11

Transmission element

12th

first warehouse opening

13th

second warehouse opening

14th

Gear housing

15th

Bearing element

16

Composite hub

17th

Motor shaft

18th

Transmission input shaft

19th

first shaft segment

20th

second shaft segment

21

first wave

22nd

second wave

23

Damping material

24

second camp

25th

first flange

26th

Fasteners

27

second flange

28

Fasteners

29

gear

30th

Gear section

31

Support element

32

camp

33

mission

34

camp

35

first bearing seat

36

second bearing seat

37

Central axis

38

Receiving section

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102014118553 A1 [0006]
• EP 2659573 B1 [0007]

Claims (10)

Connecting plate (4) for connecting an electric drive motor (1) to a transmission (3), the connecting plate (4) having at least one opening (12, 13) for the passage of a shaft (21, 22), the connecting plate (4) has a base support (5) and a damping material (23) connected to the base support (5), and wherein a bearing element (15) for supporting at least one shaft (21, 22) is received in the at least one opening (12, 13). Connecting plate (4) Claim 1 , characterized in that the base support (5) has a first fastening section on a first end face of the connecting plate (4), on which the connecting plate (4) can be connected to a housing (2) of the electric drive motor (1) and to one of the first End face opposite second end face has a second fastening section on which the connecting plate (4) can be connected to a gear housing (14). Connection plate (4) according to one of the Claims 1 or 2 , characterized in that the base support (5) is made of a metallic material, the damping material (23) being formed by one or more plastic layers which are applied to the base support (5). Connection plate (4) according to one of the Claims 1 until 3 , characterized in that the connecting plate (4) has a first bearing opening (12) and a second bearing opening (13) for mounting axially parallel shafts (21, 22). Connection plate (4) according to one of the Claims 1 until 4th , characterized in that the damping layer (3) is applied by means of a material connection with the base carrier (5). Connection plate (4) according to one of the Claims 1 until 5 , characterized in that an electrically conductive strand (10), in particular a cable (9) or a guide element (8), is introduced into the damping material (23) or a channel for conveying a liquid, in particular a Hydraulic oil, is introduced. Connecting plate (4) according to claim one of the Claims 1 until 6th , characterized in that the connecting plate (4) comprises a sensor (7), in particular an acceleration sensor or a temperature sensor, the sensor (7) on the bearing element (15) or an end section of the base support (5) facing the bearing element (15) is present. Drive unit with an electric drive motor (1) and a gear (3), the electric drive motor (1) and the gear (3) via a connecting plate (4) according to one of the Claims 1 until 7th are connected. Drive unit after Claim 8 , characterized in that a motor shaft (17) of the electric drive motor (1) is rotatably mounted in the bearing element (15). Drive unit after Claim 9 , characterized in that the motor shaft (17) is arranged concentrically to a transmission input shaft (18), an end section of the motor shaft (17) being received in the transmission input shaft (18), the transmission input shaft (18) carrying a carrier element (31), which is rotatably mounted in the bearing element (15).

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