DE102011012641B4 - Drive device with rocker arm and use of a motor swingarm - Google Patents

Abstract

Drive device with motor rocker (6) and electric motor (1), wherein the drive device comprises a of the electric motor (1) drivable transmission, which is filled with lubricant, at least partially, wherein the motor rocker (6) is designed as a cavity having hollow part and with Lubricant is at least partially filled, wherein the motor rocker (6) has protruding sections acting as cooling fins or cooling fingers, wherein the drive device comprises an air guide, which directs a cooling air flow generated by a fan of the drive device on the formed on the motor rocker (6) cooling fins, the then forward the air flow at least partially in its direction of extent, wherein as the electric motor (1) a liquid-cooled electric motor (1) is used, wherein the by the motor (1) guided cooling liquid in the cavity of the motor rocker (6) off or is fed, wherein the cavity in one piece is executed with the transmission fluid liquid cavity, wherein a first pipe (9) from the transmission interior leads to the cavity of the motor rocker (6), wherein the transmission interior and cavity are at least partially filled with lubricant, wherein a second pipe (7, 8) from the cavity of the motor rocker (6 ) leads via a pumping device to the transmission interior, wherein the cavity is divided into a plurality of chambers, so that the first pipe (9) flowing in the lubricant flows through the chambers successively and the second pipe (7, 8) opens into the last of the chambers, wherein the chambers are connected to the defoaming of the lubricant foam promoting openings, wherein one of the openings in the lower part is free and provided in the upper portion of the opening with a grid.

Description

The invention relates to a drive device with motor rocker and use of a motor rocker.

From the DE 722 688 A is a defoaming of lubricating oil in internal combustion engines known.

From the EP 0 660 492 A1 For example, a cooling system for an engine is known.

From the DE 10 2009 007 563 A1 is a drive device with holding means, so motor swing known,
wherein the drive device comprises a component at least partially filled with lubricating oil, which is designed as a motor rocker, which is designed as a hollow part and is filled with lubricant at least partially.

It describes the DE 10 2009 007 563 A1 in that external surfaces of the cavity release heat as convection surfaces, as is known for all external surfaces.

Next is from the DE 10 2009 007 563 A1 a fan known for cooling the transmission.

Moreover, from the DE 10 2009 007 563 A1 further known that the drive device one of a motor, so electric motor, drivable transmission ( 4 ) as a component, wherein the rotor shaft of the motor is connected to the input shaft of the transmission via a coupling device,
wherein the housing of the component and / or the motor is connected to the motor rocker,
wherein the lubricant conveyed from the cavity into the transmission interior enters a lubricating oil reservoir (paragraph [0031]),
wherein as an electric motor, an inert gas cooled with an electric motor is used, which is in a cavity of the engine swing off or fed,
wherein the cavity is integral with the transmission fluid cavity,
wherein a first pipeline leads from the transmission interior to the cavity of the engine rocker, wherein the transmission interior and cavity are at least partially filled with lubricant,
wherein a second pipeline leads from the cavity of the engine rocker via a pumping device to the transmission interior,
wherein the pumping device comprises a shaft end pump.

Next is from the DE 10 2009 007 563 A1 It is known that the motor rocker may have any number of cavities, that is to say two or more, in particular thermally separated from one another.

From the DE 10 2005 016 905 B3 is an electric motor with fan known.

From the DE 10 2005 031 197 A1 is a drive with fan known.

From the DE 10 2008 017 643 A1 An adapter for a transmission is known.

From the DE 10 2008 017 755 A1 a cooling arrangement for a transmission is known.

From the DE 10 2009 014 317 A1 a transmission is known.

From the EP 2 410 209 A1 a cooling device for a transmission is known.

From the Encyclopedia Maschinenbaur, edited by Heinz M. Hiersig, ISBN 3-18-401372-3, pages 1039 to 1042 is known to defoam oil, for example with foam inhibitors (page 1040, right column, ninth last line) or antifoaming agents (page 1042 , left column, ninth last line). In addition, page 1041 an oil pan for defoaming is known.

The invention is therefore the object of developing a drive device compact.

According to the invention the object is achieved in the drive device according to the features specified in claim 1 and in the use according to the features indicated in claim 8.

Important features of the invention in the drive device with holding means, in particular motor swing or foundation frame, are that the drive device has a lubricant, in particular lubricating oil, at least partially filled component, wherein the motor rocker is designed as a hollow part and is filled with lubricant at least partially.

In this case, a foundation frame is arranged on the ground and receives the drive device which is connected to it, in particular screw-connected. So he performs holding function for the drive device.

A swingarm also performs this function. In addition, it also derives torque of the drive device, in particular via a corresponding Kraftableitmittel.

The advantage here is that noise emissions are reducible. Because the executed as a hollow part of the motor rocker is filled with lubricant, especially oil, so that a reinforced Damping of vibration energy, such as structure-borne noise is caused, which is initiated by the transmission or engine in the engine swingarm.

In addition, the motor rocker is used for cooling and soothing the lubricant, so that a higher power density of the drive device can be achieved. Because by the supply of lubricant from the transmission interior to the cavity of the motor swing and the heat energy located in the lubricant is also transported. The heat is then dissipated to the wall of the cavity of the engine rocker and from there to the environment. The surface towards the environment is thus made enlarged and the heat can be spread in this way on the large surface.

According to the invention, the drive device as a component of a motor, in particular electric motor drivable transmission, in particular wherein the rotor shaft of the motor is connected to the driving shaft of the transmission, in particular via a coupling device with or without brake. The advantage here is that the engine swing the drive components, ie gearbox, engine, brake and / or clutch, receives and these components acts as a solid foundation.

In an advantageous embodiment, the housing of the component and / or the motor is connected to the motor rocker, in particular screw-connected. The advantage here is that a simple viable connection, which is also also used thermally conductive. Because thus the metallic housing of the components and the motor rocker are connected by means of a metallic screw, the heat of the housing of the component is thus also forwarded to the motor rocker. Intermediate damping elements and / or compensating elements are preferably also made of metal. The metal is particularly well suited to steel or aluminum.

According to the invention, the motor rocker has cooling ribs and / or protruding sections acting as cooling ribs. The advantage here is that the surface is further enlarged. When using cooling fins on the motor swing even an isotropic convective, so passive, heat dissipation can be used.

According to the invention, a first pipeline leads from the interior of the transmission to the hollow space of the engine rocker, wherein the interior of the transmission and the cavity are at least partially filled with lubricant. The advantage here is that the first pipe can be guided downwards, so that the lubricant automatically flows under the influence of gravity into the cavity.

According to the invention, a second pipeline leads from the cavity of the engine rocker via a pumping device to the transmission interior. The advantage here is that the lubricant flow is controllable, so that the flow rate can be reduced to such a value that the foaming can be reduced and / or the defoaming or settling of the foamed lubricant can be improved.

In an advantageous embodiment, the pumping device has a shaft end pump and / or a pump driven by an electric motor. The advantage here is that in a Wellenendpumpe no special drive is necessary and in a pump, a simple motor drive.

In an advantageous embodiment of the cavity and the flow through the pipe are dimensioned such that the cavity acts as a means for defoaming and / or calming lubricant foam, in particular oil foam. The advantage here is that at sufficiently low flow and sufficiently large cavity, a calming of the foamed by the rotating teeth parts lubricant is made possible. Thus, the foam degrades and the recirculating from the cavity in the transmission interior lubricant has substantially no air pockets.

• – zur Druckschmierung des Getriebes verwendet
• – und/oder fungiert als Druckschmierung
• – und/oder wird zum Eingriffsbereich von miteinander im Eingriff stehenden Verzahnungen und/oder zu einem zu schmierenden Lager des Getriebes geleitet.

Von Vorteil ist dabei, dass eine effektive Druckschmierung des Getriebes ausführbar ist, insbesondere mit beruhigtem, also entschäumtem Schmierstoff.In an advantageous embodiment of the funded from the cavity in the transmission interior lubricant is

• - used for pressure lubrication of the gearbox
• - and / or acts as pressure lubrication
• - And / or is passed to the engagement region of intermeshing teeth and / or to be lubricated bearing of the transmission.

The advantage here is that an effective pressure lubrication of the transmission is executable, especially with calmed, so defoamed lubricant.

According to the invention, a liquid-cooled electric motor is used as the electric motor, with the cooling fluid guided through the engine being discharged or fed into a cavity of the engine rocker,
wherein the cavity is integral with the transmission fluid cavity.

The advantage here is that not only the transmission oil is coolable and defoamable in the cavity of the motor swing arm but this oil is also used to cool the driving motor. As a result, as uniform as possible thermal temperature of the geared motor can be achieved. Alternatively, in a non-inventive Execution also two different or similar cavities in the engine rocker vorsehbar, so that the engine coolant is cooled separately from the transmission fluid. For example, water can be used to cool the engine and oil to cool the transmission. For the engine-side cooling system, a separate pump is necessary. For example, for this purpose, a B-side, so on the axial side facing away from the transmission, used suitable driven by the rotor shaft of the motor pump.

Important features in the use of a motor rocker of a drive device as a heat sink and / or additional tank for lubricant of a component of the drive device are that the motor rocker is designed as a hollow part.

The advantage here is that by means of the motor swing an additional function can be performed. In particular, the motor rocker increases by means of its wall surrounding the cavity, the surface of the lubricant for heat dissipation. In addition, no particularly significant additional space is necessary because the engine rocker anyway requires a space area for producing the mechanical stability. By introducing a cavity, even the stability of the motor rocker can be further increased. In addition, the lubricant acts in the cavity damping for noise emissions, such as structure-borne noise emissions.

The invention will now be explained in more detail with reference to schematic illustrations:

In the 1 a drive device according to the invention is shown.

This is an engine 1 , which is preferably designed as an electric motor, provided, the rotor shaft via an engine-side coupling 2 and a brake 3 with the driving shaft of a gearbox 4 connected is. The output shaft of the transmission 4 is via a driven-side clutch 5 connected to a driven by the drive device, rotatably mounted part of a device, not shown.

The motor 1 has a housing in which a stator is provided and receives the bearing, by means of which the rotor shaft is mounted.

The gear 4 has a housing which comprises rotatably mounted toothing parts and lubricant, in particular oil. In this case, the gear housing surrounded by the housing is preferably only partially filled with lubricant.

At least the transmission 4 and the engine 1 are with their respective housing on a motor swingarm 6 disposed

The motor rocker is designed according to the invention as a hollow part. So it includes a cavity.

This cavity of the engine swingarm 6 is by means of two pipes ( 7 . 8th . 9 ) connected to the at least partially lubricated gear interior. The pipeline 7 leads to the pump 10 , From there the pipeline leads 8th in the transmission interior, in particular in its upper region. In the lower part of the transmission interior, a pipeline opens 9 , which to the cavity of the engine swingarm 6 leads.

To produce a lubricant circuit, a first pipeline is provided, which extends from the interior of the transmission to the cavity of the engine rocker 6 leads. Because the gearbox on the engine swingarm 6 is arranged and thus arranged higher than the cavity, the lubricant flows under the action of gravitational force through the pipeline 9 automatically into the cavity. A return of the lubricant from the cavity into the transmission interior is by means of a second pipe 7 + 8th arranged pump 10 intended. The pump is either driven by a further electric motor or designed as a shaft end pump, in particular so driven by the driving shaft or by an intermediate shaft of the transmission.

By means of the hollow design of the engine swingarm 6 Thus, an improved cooling of the lubricant of the transmission is possible. Because the motor rocker is not purely cuboid running but has outstanding sections, as in a T-beam, so that high mechanical rigidity and stability can be achieved with low cost of materials. The from the body of the engine swingarm 6 outstanding sections act a cooling fin according to surface enlarging.

The volume of the cavity and the delivery rate of the pump are designed to defoam the lubricant of the transmission. For this purpose flows through the pipeline 9 the lubricant foam generated by the splashing of the teeth parts in the cavity and is calmed down there, so defoamed.

In a further exemplary embodiment according to the invention, a lubricant filter, in particular an oil filter, and / or a sensor detecting the flow of lubricant and / or a pressure switch are provided in the lubricant circuit.

According to the invention, the cavity is subdivided into several chambers, so that the one from the pipeline 9 incoming lubricant passes through the chambers one after the other and the pipeline 7 and 8th opens into the last of the chambers, in particular wherein the chambers are connected to the defoaming of the lubricant foam promoted openings. For this purpose, an opening in the lower part is free and provided in the upper portion of the opening with a grid, in particular wherein the grid has recesses whose diameter is smaller than the average or smallest diameter of air bubbles in the lubricant.

In another exemplary embodiment according to the invention, an oil filter, a temperature sensor, a flow sensor and / or a permanent magnet for extracting ferromagnetic particles from the lubricant is or are arranged in the motor rocker. Thus, further functions can be integrated in the engine swingarm.

LIST OF REFERENCE NUMBERS

1

engine

2

engine-side coupling

3

brake

4

transmission

5

output-side coupling

6

swing base

7

suction

8th

pressure line

9

Return line

10

Shaft end pump or motor pump

Claims (9)

Drive device with rocker arm ( 6 ) and electric motor ( 1 ), wherein the drive device is one of the electric motor ( 1 ) drivable transmission, which is filled with lubricant, at least partially, wherein the engine rocker ( 6 ) is designed as a cavity having hollow part and is at least partially filled with lubricant, wherein the motor rocker ( 6 ) has outstanding sections acting as cooling ribs or cooling fingers, the drive device having an air guiding means, which generates a cooling air flow generated by a fan of the drive device to the engine rocker ( 6 ) shaped cooling fins, which then forward the air flow at least partially in its direction of extent, wherein as an electric motor ( 1 ) a liquid-cooled electric motor ( 1 ) is used, whereby by the engine ( 1 ) guided coolant into the cavity of the engine rocker ( 6 ), wherein the cavity is made in one piece with the transmission fluid cavity, wherein a first pipeline ( 9 ) from the transmission interior to the cavity of the engine rocker ( 6 ), wherein the transmission interior and cavity are at least partially filled with lubricant, wherein a second pipeline ( 7 . 8th ) from the cavity of the engine rocker ( 6 ) leads via a pumping device to the transmission interior, wherein the cavity is divided into a plurality of chambers, so that of the first pipeline ( 9 ) flowing through the chambers one after the other and the second pipeline ( 7 . 8th ) opens into the last of the chambers, wherein the chambers are connected to the defoaming of the lubricant foam promoting openings, wherein one of the openings in the lower part is free and provided in the upper portion of the opening with a grid. Drive device according to claim 1, wherein the rotor shaft of the electric motor ( 1 ) with the driving shaft of the transmission ( 4 ) is connected via a coupling device with or without brake ( 3 ). Drive device according to one of the preceding claims, characterized in that the housing of the component and / or the engine ( 1 ) with the rocker arm ( 6 ) connected is. Drive device according to one of the preceding claims, characterized in that the pumping device has a shaft end pump and / or driven by an electric motor pump. Drive device according to one of the preceding claims, characterized in that the cavity and the flow through the pipe are dimensioned such that the cavity acts as a means for defoaming and / or calming lubricant foam. Drive device according to one of the preceding claims, characterized in that the conveyed from the cavity in the transmission interior lubricant - for pressure lubrication of the transmission ( 4 ) is used - and / or acts as a pressure lubrication - and / or the engagement region of intermeshing teeth and / or to be lubricated bearing of the transmission ( 4 ). Drive device according to one of the preceding claims, characterized in that in the engine rocker ( 6 ) an oil filter, a temperature sensor, a flow sensor and / or a Permanent magnet is arranged to extract ferromagnetic particles from the lubricant or are. Use of a rocker arm ( 6 ) a drive device as a heat sink and / or auxiliary tank for lubricant of a component of the drive device, wherein the drive device is designed according to one of the preceding claims, wherein the engine rocker ( 6 ) is designed as a cavity having hollow part, so that the engine rocker ( 6 ) acts as a means for defoaming and / or calming lubricant foam, wherein a first pipeline ( 9 ) from the transmission interior to the cavity of the engine rocker ( 6 ), wherein the transmission interior and cavity are at least partially filled with lubricant, wherein a second pipeline ( 7 . 8th ) from the cavity of the engine rocker ( 6 ) leads via a pumping device to the transmission interior, wherein the cavity is divided into a plurality of chambers, so that of the first pipeline ( 9 ) flowing through the chambers in succession and the second pipeline ( 7 . 8th ) opens into the last of the chambers, wherein the chambers are connected to the defoaming of the lubricant foam promoting openings, wherein one of the openings in the lower part is free and provided in the upper portion of the opening with a grid. Use according to claim 8, wherein the grid has recesses whose diameter is smaller than the average diameter of trapped air in the lubricant.

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