CN114992174A - Hydraulic device and electrically operable drive train - Google Patents

Hydraulic device and electrically operable drive train Download PDF

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Publication number
CN114992174A
CN114992174A CN202111361409.2A CN202111361409A CN114992174A CN 114992174 A CN114992174 A CN 114992174A CN 202111361409 A CN202111361409 A CN 202111361409A CN 114992174 A CN114992174 A CN 114992174A
Authority
CN
China
Prior art keywords
electrical contact
hydraulic
contact means
electrically
plane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111361409.2A
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Chinese (zh)
Inventor
托比亚斯·加卢斯
彼得·格雷布
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of CN114992174A publication Critical patent/CN114992174A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in the reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/26—Supply reservoir or sump assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0846—Electrical details
    • F15B13/0857—Electrical connecting means, e.g. plugs, sockets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to a hydraulic device (1) for an electric power aggregate (2) having an electric motor (3), wherein the hydraulic device (1) comprises a hydraulic reservoir (4) in which an electrically operable hydraulic pump (5) and at least one electrically switchable hydraulic valve (6) are arranged, wherein the hydraulic device (1) has an electrical contact device (7) which passes through the hydraulic reservoir (4) and has a first electrical contact means (8) for electrically connecting the hydraulic pump (5) to the electrical contact device (7) and a second electrical contact means (9) for electrically connecting the hydraulic valve (6) to the electrical contact device (7), and the electrical contact device (7) furthermore comprises a third electrical contact means (10) which is arranged outside or inside the hydraulic reservoir (4), and the third electrical contact means (10) is electrically connected to the first electrical contact means (8) and the second electrical contact means (9).

Description

Hydraulic device and electrically operable drive train
Technical Field
The invention relates to a hydraulic device for a drive train having an electric motor, wherein the hydraulic device comprises a hydraulic reservoir in which an electrically operable hydraulic pump and at least one electrically switchable hydraulic valve are arranged. The invention also relates to an electrically operable drive train having a hydraulic system.
Background
In motor vehicles, electric motors are increasingly used for driving in order to realize alternatives to internal combustion engines that require petroleum fuels. In order to improve the everyday suitability of electric drives and in addition to provide the user with customary driving comfort, considerable efforts have already been made.
A detailed description of the electric drives is given in Erik Schneider, Frank Fickl, Bernd Cebulski and Jens Liebold in journal ATZ 113, 5.2011, pages 360 to 365, entitled "Hochintegritiv und Flexibel Elektrische and triebseinheit fur E-Fahrzege", which forms the closest prior art. In this article, a drive unit for an axle of a vehicle is described, which drive unit comprises an electric motor which is arranged concentrically and coaxially with respect to a bevel gear differential, wherein a switchable 2-speed planetary gear set is arranged in the power path between the electric motor and the bevel gear differential, which 2-speed planetary gear set is likewise positioned coaxially with respect to the electric motor or the bevel gear differential or the spur gear differential. The drive unit is very compact and allows a good compromise between climbing capacity, acceleration and energy consumption due to the switchable 2-speed planetary gear set. Such a drive unit is also referred to as an electric axle or as an electrically operable drive train.
Such electrically operable drive trains usually require hydraulics for cooling and/or for the shifting process in a shiftable transmission.
There is a permanent requirement to design such hydraulic systems in particular in an installation-friendly, compact and operationally reliable manner.
Disclosure of Invention
It is therefore an object of the present invention to provide a hydraulic device for an electric power assembly with an electric machine, which electric power assembly meets the requirements. Furthermore, it is an object of the invention to provide an electrically operable drive train having an improved hydraulic device.
The object is achieved by a hydraulic device for an electric power assembly having an electric motor, wherein the hydraulic device comprises a hydraulic reservoir tank in which an electrically operable hydraulic pump and at least one electrically switchable hydraulic valve are arranged, wherein the hydraulic device has an electrical contact device which passes through the hydraulic reservoir tank and has a first electrical contact for electrically connecting the hydraulic pump with the electrical contact device and a second electrical contact for electrically connecting the hydraulic valve with the electrical contact device, and the electrical contact device further comprises a third electrical contact which is arranged outside or inside the hydraulic reservoir tank and which is electrically connected to the first electrical contact and the second electrical contact.
The hydraulic device is particularly installation-friendly, since the individual electrical connections are already predefined in one component by the electrical contact device and do not have to be laid and installed separately. The hydraulic device can furthermore be electrically wired in a simple and installation-friendly manner by means of a third electrical contact mechanism, which is arranged outside the hydraulic reservoir. Subsequently, the entire hydraulic device can be pre-configured as a modular component and arranged, for example, at a trolley bridge.
The electrical contact means are preferably designed as form-fitting and/or force-fitting plug contacts. In principle, it is also conceivable for the contact means to be designed for soldering or welding. It is furthermore preferred that the electrical contacting means is not surrounded by an insulating material.
The electrical contact device is particularly preferably configured such that it can be electrically and structurally connected from the installation direction to at least one hydraulic valve, preferably all hydraulic valves and hydraulic pumps, by plugging. In this way, an embodiment of an electrical contact device is provided which can be plugged in the direction of the components to be electrically and mechanically connected and which simultaneously achieves a mechanical fixation, an electrical contact and, particularly preferably, also a sealing with respect to the hydraulic fluid in the hydraulic reservoir.
The electrical contact device can also be formed in multiple parts. For example, it is conceivable that, for adapting the electrical contacting device to different installation situations, an adapter element is provided, which, for example, allows an extension of the electrical contacting device and/or an adaptation to different plug/socket systems. In principle, it is possible to configure the electrical contact device such that the adapter element is electrically and mechanically connected to a third electrical contact device inside or outside the hydraulic reservoir. In particular, the adapter element can also establish an electrical and mechanical connection to the control device of the electrical power assembly.
The hydraulic device has a hydraulic reservoir for receiving and storing hydraulic fluid. Preferably, the hydraulic storage container has a closable opening for filling with hydraulic liquid. The hydraulic reservoir is preferably designed as an oil sump. Particularly preferably, the hydraulic reservoir is formed from plastic.
According to an advantageous embodiment of the invention, it can be provided that the electrical contact device is designed as a lead frame. In the sense of the present invention, a leadframe, which is sometimes also referred to as a connecting frame, is a metal conductor carrier in the form of a plurality of electrical conductors arranged in a positionally fixed manner with respect to one another. The electrical conductors of the lead frame can in particular also be insulated, for example by means of an insulating varnish or plastic. It is also possible for the leadframe to be arranged within the housing so as to be surrounded at least in sections by the housing material.
It is particularly preferred that the electrical conductors of the lead frame are surrounded by plastic, which is guided around the electrical conductors by means of an injection molding process. The electrical conductors can in this case be designed in particular as inserts into an injection molding tool, which inserts are then subsequently encapsulated by plastic injection molding so as to assume a predefined orientation and position relative to one another. The leadframe can thus be designed in particular as a component which is encapsulated by plastic injection molding and has electrical conductors running within the component, wherein the component has a defined fixed spatial shape.
According to a further preferred development of the invention, it can also be provided that the electrical contact device has a fourth electrical contact means for electrically contacting the at least one pressure sensor, which is electrically conductively connected to the third electrical contact means, whereby a simple electrical connection of the pressure sensor can likewise be provided by the contact device.
Furthermore, according to an equally advantageous embodiment of the invention, it can be provided that the electrically conductive connection between the first electrical contact means and the third electrical contact means
And/or
Electrically conductive connection between a second electrical contact means and a third electrical contact means
And/or
The electrically conductive connection between the fourth electrical contact means and the third electrical contact means is formed by a busbar.
The advantageous effect of this embodiment is that the busbar offers a relatively high mechanical stability in shape. This is advantageous in particular if, when the busbar is encapsulated by plastic injection molding, the busbar, apart from being electrically conductive, also has the function of a reinforcement for structurally reinforcing the plastic injection molding. It is particularly preferred that the busbar has a cross section other than circular, particularly preferably rectangular.
According to a further particularly preferred embodiment of the invention, it can be provided that the busbar is at least partially, preferably completely, encapsulated by plastic injection molding. At the distal ends of the busbars, the electrical contact means are each advantageously formed and preferably integrally molded with the busbars.
Alternatively or additionally, it is also possible for the bus bar to be surrounded by plastic. For example, it is conceivable to insert the bus bar into an insert body made of plastic, wherein the insert body is first formed and the bus bar is subsequently connected to the insert body. The fixing of the bus bar in the corresponding insert body can be carried out, for example, by gluing, pouring, screwing, hot pressing/hot riveting, pressing, snapping, etc.
Furthermore, the invention can also be developed in that the electrical contact device has a dry space located within the hydraulic reservoir for accommodating the rotor position sensor. Thereby, the electrical installation of the hydraulic device is also simplified.
In an equally preferred embodiment of the invention, it can also be provided that the electrical contact device has a first plane and a second plane running parallel to the first plane, wherein the first plane and the second plane are connected to one another via a connecting section, and the busbar runs within the first plane, the second plane and/or the connecting section, as a result of which a space-optimized design for an electrical contact hydraulic pump can be achieved, wherein the hydraulic pump is arranged, for example, between the first and the second plane.
The object of the invention is further achieved by an electrically operable drive train of a motor vehicle, comprising an electric machine and a transmission device, wherein the electric machine and the transmission device form a structural unit, and the electrically operable drive train comprises a hydraulic device according to the above. According to a preferred embodiment of the subject matter of the invention, it can be provided that the electrically operable drive train has a control device for controlling the hydraulic pump and the hydraulic valve, wherein the control device is electrically conductively connected to the hydraulic unit via a third electrical contact means of the electrical contact device, so that a particularly simple and installation-friendly design of the hydraulic unit can be provided. Finally, the invention can also be advantageously embodied in such a way that the electrically operable drive train and the hydraulic unit form a structural unit and the electrically operable drive train can be preassembled into the drive train of the motor vehicle.
Drawings
In the following, the invention is explained in detail without limiting the general inventive concept according to the figures. The figures show:
FIG. 1 shows a schematic cross-sectional view of a hydraulic apparatus, an
Figure 2 shows a schematic perspective view of an electrical contacting device,
figure 3 shows a schematic cross-sectional view of a hydraulic device with an adapter element in two different embodiments,
FIG. 4 shows a schematic cross-sectional view of a hydraulic apparatus with an adapter element in two different embodiments, an
Fig. 5 shows a schematic block diagram of a motor vehicle with an electrically operable drive train.
Detailed Description
Fig. 1 shows a hydraulic unit 1 for an electric drive assembly 2 having an electric machine 3, as is also exemplarily depicted in fig. 5. The illustrated hydraulic system 1 comprises a hydraulic reservoir 4 which is designed as an oil sump and which stores hydraulic oil, not illustrated. An electrically operable hydraulic pump 5 and three electrically switchable hydraulic valves 6 are arranged in the hydraulic reservoir 4.
The hydraulic system 1 furthermore has an electrical contact device 7 which penetrates the hydraulic reservoir 4 in a sealed manner at the top end of the hydraulic reservoir. Alternatively or additionally, it is also conceivable, however, for the seal to be passed through the hydraulic reservoir 4 from the outside, so that the seal is arranged on the outside of the hydraulic reservoir 4. The sealing element can be formed integrally with the contact device 7 or be formed as a separate component. The sealing of the hydraulic storage tank 4 can thus take place between the electrical contact device 7 located inside and the inner wall of the hydraulic storage tank 4 and/or the outer wall of the hydraulic storage tank 4.
A first electrical contact means 8 for electrically connecting the hydraulic pump 5 to the electrical contact device 7 (not visible in fig. 1, but visible in conjunction with fig. 2) and a second electrical contact means 9 for electrically connecting the hydraulic valve 6 to the electrical contact device 7 are formed on the electrical contact device 7. The first electrical contact means 8 and the second electrical contact means 9 are positioned within the hydraulic reservoir tank 4 and can be located, depending on the level of the hydraulic reservoir tank 4, below the level of the hydraulic oil.
The electrical contact device 7 has a first plane 15 and a second plane 16 running parallel to the first plane 15, wherein the first plane 15 and the second plane 16 are connected to each other via a connecting section 17, and the busbar runs within the first plane 15, the second plane 16 and the connecting section 17. Between the first plane 15 and the second plane 16 a hydraulic pump 5 is arranged. The electrical contact device 7 is configured in such a way that it can be connected to the hydraulic valve 6 and the hydraulic pump 5 from the installation direction, in the example shown from above. For this purpose, the first and second electrical contact means 8, 9 have an extension oriented in the mounting direction. The electrical contacting of the third electrical contacting means 10 is likewise carried out in the same oriented mounting direction.
The electrical contact device 7 furthermore comprises a third electrical contact means 10, which is arranged outside the hydraulic reservoir 4. The third electrical contact means 10 is electrically connected to the first electrical contact means 8 and the second electrical contact means 9. Thereby, an electrical contact from the dry space into the wet space within the hydraulic reservoir 4 can be achieved. The third electrical contact means 10 is designed as a multi-pole plug socket, so that a complete electrical contact can be established by means of a mating plug. However, different plug/socket variants than those shown in the exemplary embodiments can also be provided.
As can now be seen from fig. 2, the electrical contact device 7 is designed as a lead frame. In the illustrated exemplary embodiment, the contact device 7 is designed as a plastic body, in which a bus bar for electrically connecting the third electrical contact means 10 to the first and second electrical contact means 8, 9 is embedded.
As is also well known from fig. 2, the electrical contact device 7 has a fourth electrical contact means 12 for electrically contacting the at least one pressure sensor, which is electrically conductively connected to the third electrical contact means 10.
Although this cannot be derived directly from fig. 2 due to the plastic encapsulation, the electrically conductive connection between the first electrical contact means 8 and the third electrical contact means 10 and the electrically conductive connection between the second electrical contact means 9 and the third electrical contact means 10 and the electrically conductive connection between the fourth electrical contact means 12 and the third electrical contact means 10 are formed by busbars. The bus bar is completely encapsulated by plastic injection molding in the exemplary embodiment shown.
It can also be seen in fig. 2 that the electrical contact device 7 has a dry space 11 located within the hydraulic reservoir 4 for accommodating the rotor position sensor. The dry space 11 can be arranged here at the contact device 7 such that it is arranged in the installed state in the immediate vicinity of the rotor of the hydraulic pump 5 or its motor. The dry space 11 is formed in one piece with the electrical contacting device 7.
Fig. 3 shows a hydraulic device 1 with an adapter element 22 in two different embodiments. In the above illustration, the hydraulic system 1 is shown, wherein the third electrical contact means 10 of the electrical contact system 7 is arranged outside the hydraulic storage tank 4. In this connection, this corresponds in principle to the embodiment known from fig. 2.
It can be seen that the electrical contact device 7 is sealed by an inner seal 19 and an outer seal 18 in the region of its connecting section 17, which passes through the hydraulic reservoir 4. One or both of the seals 18, 19 may also be formed with the electrical contact device 7 or the hydraulic reservoir 4 and/or configured as a separate sealing ring.
In order to electrically and mechanically connect the hydraulic unit 1 to the drive train 2 or to the control device 20 of the drive train 2, the adapter element 22 is connected to the third contact means 10, so that an electrical connection can be established between the control device 20, the hydraulic pump 5 and the hydraulic valve 6. The electrical connections are indicated in fig. 3 to 4 by dashed lines. The installation can be carried out, for example, in such a way that the electrical contact means 7 is first connected to the hydraulic pump 5 and the hydraulic valve 6 within the reservoir 4 and the hydraulic reservoir 4 is subsequently closed. The module thus formed can then be electrically and mechanically coupled to the adapter element 22.
The lower view of fig. 3 shows an embodiment of the hydraulic device 1, in which the third contact means 10 is arranged within the hydraulic storage tank 4. For the electrical contacting, the adapter element 22 is pushed into the hydraulic reservoir 4, wherein the reservoir 4 is then sealed off from the surroundings by the seals 18, 19 at the adapter element 22.
The assembly can then be carried out, for example, such that the adapter element 22 is first pushed into the hydraulic storage tank 4 and then the electrical contact means 7 is connected to the adapter element 22 via the bottom opening of the storage tank 4. After the installation is completed, the hydraulic reservoir 4 can then be closed by the bottom cover 21.
Common to the embodiments of fig. 3 is that the adapter element 22 is already fixedly connected to a component of the drive train 2, such as, for example, the control device 20, or is formed integrally therewith.
In principle, however, it is also conceivable for the adapter element 22 to be formed as a completely separate component, as is shown in the embodiment of fig. 4.
Fig. 5 finally shows an electrically operable drive train 2 of a motor vehicle 13, comprising an electric machine 3 and a transmission device 14, wherein the electric machine 3 and the transmission device 14 form a structural unit and the electrically operable drive train 2 comprises a hydraulic system 1 according to one of the preceding claims. The electrically operable drive train 2 furthermore has a control device, not shown, for controlling the hydraulic pump 5 and the hydraulic valve 6, wherein the control device is electrically conductively connected to the hydraulic unit 1 via a third electrical contact mechanism 10 of the electrical contact device 7 in order to electrically switch or control the hydraulic pump 5 and the hydraulic valve 6. Finally, fig. 3 also shows that the electrically operable drive train 2 and the hydraulic unit 1 form a structural unit. Here, the hydraulic reservoir tank 4 can be arranged such that it is positioned in the vertical direction above or below the electric machine 3 and/or the transmission device 14.
The invention is not limited to the embodiments shown in the drawings. The above description is therefore not to be taken in a limiting sense, but is made merely by way of illustration. The following claims are therefore to be understood to present such features in at least one embodiment of the invention. This does not exclude the presence of other features. Insofar as the claims and the above description define "first" and "second" features, the description is intended to distinguish two like features, rather than to specify an order.
List of reference numbers:
1 Hydraulic device
2 power assembly
3 electric machine
4 storage container
5 Hydraulic pump
6 hydraulic valve
7 contact device
8 contact mechanism
9 contact mechanism
10 contact mechanism
11 dry space
12 contact mechanism
13 Motor vehicle
14 Transmission device
15 plane
16 plane
17 connecting section
18 external seal
19 inner seal
20 control device
21 bottom cover
22 an adapter element.

Claims (10)

1. A hydraulic device (1) for an electric power assembly (2) having an electric motor (3), wherein the hydraulic device (1) comprises a hydraulic reservoir (4) in which an electrically operable hydraulic pump (5) and at least one electrically switchable hydraulic valve (6) are arranged,
it is characterized in that the preparation method is characterized in that,
the hydraulic device (1) has an electrical contact device (7) which passes through the hydraulic reservoir (4) and which has a first electrical contact means (8) for electrically connecting the hydraulic pump (5) to the electrical contact device (7) and a second electrical contact means (9) for electrically connecting the hydraulic valve (6) to the electrical contact device (7), and the electrical contact device (7) furthermore comprises a third electrical contact means (10) which is arranged outside or inside the hydraulic reservoir (4) and which third electrical contact means (10) is electrically connected to the first electrical contact means (8) and the second electrical contact means (9).
2. The hydraulic apparatus (1) according to claim 1,
it is characterized in that the preparation method is characterized in that,
the electrical contact device (7) is designed as a lead frame.
3. The hydraulic apparatus (1) according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the electrical contact device (7) has a fourth electrical contact means (12) for electrically contacting the at least one pressure sensor, which is electrically conductively connected to the third electrical contact means (10).
4. The hydraulic device (1) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
an electrically conductive connection between the first electrical contact means (8) and the third electrical contact means (10)
And/or
An electrically conductive connection between the second electrical contact means (9) and the third electrical contact means (10)
And/or
An electrically conductive connection between the fourth electrical contact means (12) and the third electrical contact means (10)
Formed by a busbar.
5. The hydraulic apparatus (1) according to claim 4,
it is characterized in that the preparation method is characterized in that,
the bus bar is at least partially, preferably completely, surrounded by plastic, in particular injection-molded.
6. The hydraulic device (1) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the electrical contact device (7) has a dry space (11) located within the hydraulic storage tank (4) for accommodating a rotor position sensor.
7. The hydraulic device (1) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the electrical contact device (1) has a first plane (15) and a second plane (16) running parallel to the first plane (15), wherein the first plane (15) and the second plane (16) are connected to one another via a connecting section (17), and the busbar runs within the first plane (15), the second plane (16) and/or the connecting section (17).
8. An electrically operable drive train (2) of a motor vehicle (13), comprising an electric machine (3) and a transmission device (14), wherein the electric machine (3) and the transmission device (14) form a structural unit, and the electrically operable drive train (2) comprises a hydraulic apparatus (1) according to any one of the preceding claims.
9. The electrically operable powertrain (2) of claim 8,
it is characterized in that the preparation method is characterized in that,
the electrically operable drive train (2) has a control device for controlling the hydraulic pump (5) and the hydraulic valve (6), wherein the control device is electrically conductively connected to the hydraulic unit (1) via the third electrical contact means (10) of the electrical contact device (7).
10. The electrically operable powertrain (2) of claim 8 or 9,
it is characterized in that the preparation method is characterized in that,
the electrically operable drive train (2) and the hydraulic unit (1) form a structural unit.
CN202111361409.2A 2020-11-17 2021-11-17 Hydraulic device and electrically operable drive train Pending CN114992174A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020130259.2A DE102020130259B4 (en) 2020-11-17 2020-11-17 Hydraulic device and electrically operable drive train
DE102020130259.2 2020-11-17

Publications (1)

Publication Number Publication Date
CN114992174A true CN114992174A (en) 2022-09-02

Family

ID=81345512

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111361409.2A Pending CN114992174A (en) 2020-11-17 2021-11-17 Hydraulic device and electrically operable drive train

Country Status (2)

Country Link
CN (1) CN114992174A (en)
DE (1) DE102020130259B4 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29618572U1 (en) 1996-10-24 1998-02-26 Schwarzbich Joerg Home appliance

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Publication number Publication date
DE102020130259A1 (en) 2022-05-19
DE102020130259B4 (en) 2022-12-15

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