DE102008050059A1 - Stirnraddifferentialgetriebeeinheit - Google Patents

Abstract

The invention is based on a spur gear differential unit with a drive unit (1a; 1b; 1c; 1d) having a first gear element (2a; 2b; 2c; 2d) with two differential output units (3a, 4a; 3b, 4b; 3c, 4c 3d, 4d) having a second and a third gear element (5a, 6a; 5b, 6b; 5c, 6c; 5d, 6d) and a friction coupling device (7a; 7b; 7c; 7d) provided thereto at least two of the gear elements (2a, 5a; 5b, 6b; 2c, 5c; 2d, 5d) to be connected together. It is proposed that the friction clutch device (7a; 7b; 7c; 7d) has at least one mechanical actuation actuator (8a, 9a; 8b, 9b, 10b; 9c; 8d, 9d).

Description

Field of the invention

The The invention relates to a Stirnraddifferentialgetriebeeinheit with a drive unit having a first transmission element, with two differential output units, a second and a have third gear element, and with a friction clutch device, which is intended to at least two of the transmission elements with each other connect to.

Background of the invention

From the DE 10 2005 007 726 A1 already a Stirnraddifferentialgetriebeeinheit with a friction clutch device is known. Such a device is used in particular for transmitting power in a motor vehicle.

Summary of the invention

Of the The invention is in particular based on the object of providing a spur gear differential unit, the one simple operating unit for operation comprising the friction clutch device. It will be according to the Invention solved by the features of claim 1. Further Embodiments emerge from the subclaims.

The The invention is based on a spur gear differential unit with a drive unit having a first transmission element, with two differential output units, a second and a have third gear element, and with a friction clutch device, which is intended to at least two of the transmission elements with each other connect to.

It It is proposed that the friction clutch device at least having a mechanical Betätigungsaktuator. By a mechanical actuating actuator may be a spur gear differential unit be provided in the case of an elaborate hydraulic Actuatorics can dispense, creating a simple operating unit for the friction clutch device can be realized.

Under a friction clutch device is intended in particular a friction clutch device be understood that has at least two friction surfaces, intended for a frictional contact are. Next is under a "mechanical Betätigungsaktuator" in particular an Betätigungsaktuator be understood, provided for this purpose is, by mechanical means and one introduced into the actuator first force to generate a second force, at least in their direction, size and / or type of the first one Power differs, being under a "kind of force" in particular a distinction with respect to a linear force and a torque to be understood. In particular, should understood by a mechanical actuator, a mechanical device be provided, by means of a torque linear force or by means of a linear force to a torque generate, wherein the linear force advantageously along a rotation axis to the torque acts. Under "intended" should especially specially equipped and / or designed understood become.

Further it is proposed that the Betätigungsaktuator at least a functional surface for generating an axial force having. This can be an easy actuation force for the friction clutch device can be provided. Under one Functional surface is intended in particular an inclined surface be understood, which is easy to generate an axial force can be used.

Preferably the friction clutch device is at least partially passive Actuator on. This can be a transfer case unit be provided in the on a complex supply of a Actuator can be dispensed with, which costs are saved can. Under a "passive operation unit" should in this context, in particular an actuating unit be understood that for generating an actuating force only one input to the drive unit drive torque uses that for forwarding to the differential output units is provided. Under a "at least partially passive Actuator "should in this context be understood in particular an actuating unit, at least the drive torque introduced at the drive unit partially uses to generate an actuating force. Especially it should be understood as an actuator that is at least partially is independent of any additional actuators. Under an "additional actuator" should In this case, in particular, an actuator system can be understood which is independent from a drive torque introduced via the drive unit is, such as a hydraulic actuator, which is a pressure source which is independent of that in the drive unit initiated driving torque is driven, or an electric Actuator by means of a battery or an independent Generator is driven.

Further It is suggested that the passive actuator unit having the mechanical Betätigungsaktuator. Thereby can be a particularly simple embodiment for the passive Actuator can be found.

In a further embodiment, it is proposed that the Stirnraddifferentialgetriebeeinheit a Gear set has, at least partially single-storey executed with the Betätigungsaktuator. Thereby can be a particularly simple design for the mechanical Betätigungsaktuator be found. In particular, can This simply realizes a passive mechanical Betätigungsaktuator become.

advantageously, the gear set has at least one helical gear on that for a drive of at least one of the differential output units is provided. Using a helical gearing can be easy an axial force is generated by means of a torque, whereby an advantageous mechanical Betätigungsaktuator provided can be.

Further It is proposed that the friction clutch device active Actuator having, for generating an axial Force is provided. This allows the Stirnraddifferentialgetriebeeinheit be locked regardless of the initiated moment, whereby simply realized a Stirnraddifferentialgetriebeeinheit can be locked by means of a control unit. Particularly preferably, the actuator is an electromagnetic and / or hydraulic actuator formed. But there are others too active actuators conceivable.

In an advantageous embodiment of the Stirnraddifferentialgetriebeeinheit It is proposed that the friction clutch device provided for this purpose is, the transmission element of the drive unit with at least one to connect the transmission elements of the differential output units. As a result, a lockable Stirnraddifferentialgetriebeeinheit be realized with a structurally simple design. In particular, the friction clutch device may be as a unit prefabricated to a fully assembled Spur gear differential can be flanged.

In a further advantageous embodiment is proposed the friction clutch device is provided for this purpose, the transmission elements to connect the differential output units together. Thereby can realize an axially compact Stirnraddifferentialgetriebeeinheit become. In particular, in such an embodiment, the friction coupling device be arranged axially between the differential output units, whereby a particularly compact Stirnraddifferentialgetriebeeinheit can be realized.

Further It is proposed that the Stirnraddifferentialgetriebeeinheit a housing unit which is at least partially integral executed with at least a part of the friction clutch device is. This allows the housing unit easy for a torque forwarding be used, creating a compact Stirnraddifferentialgetriebeeinheit can be realized. Advantageously, the housing unit provided the drive torque from the drive unit to the Forward frictional coupling device.

advantageously, the friction clutch device is designed as a Reiblamellenkupplung. Thereby Advantageously high moments can be transmitted. In particular, it is advantageous if the friction clutch device is designed as a wet clutch.

In A further embodiment proposes that the spur gear differential unit a Has a differential output unit and a coupling device, which is intended to the differential output unit with the Drive unit to connect. This can easily be another Unit can be driven by means of a drive machine. Especially can be realized by a motor vehicle that more than one driven axle, whereby a drive torque especially can be advantageously transferred to a substrate.

advantageously, the coupling device has an at least partially passive Actuator on. This can be a particularly simple Stirnraddifferentialgetriebeeinheit be realized, which advantageously to dispense with an additional actuator at least partially can. Preferably, the coupling device is self-closing executed.

Preferably the coupling device has at least one mechanical actuating actuator on. This can be a structurally simple Betätigungsaktuator to be provided.

Further Advantages are shown in the following description of the drawing. The drawings, the description and the claims contain numerous features in combination. The skilled person will become the characteristics expediently also consider individually and to summarize meaningful further combinations.

Brief description of the drawings

In The drawings are four embodiments of the invention shown, which will be described in more detail below. It demonstrate:

1 schematically a Stirnraddifferentialgetriebeeinheit with a friction clutch device for blocking differential output units;

2 schematically another Stirnraddifferentialgetriebeeinheit with an alternative arrangement of a friction clutch device;

3 schematically a Stirnraddifferentialgetriebeeinheit with a friction clutch device having an active Betätigungsaktuator;

4 schematically a Stirnraddifferentialgetriebeeinheit with a secondary drive unit.

Detailed description the drawings

1 schematically shows a Stirnraddifferentialgetriebeeinheit for a motor vehicle. It is intended to connect a non-illustrated engine of the motor vehicle with non-illustrated drive wheels of the motor vehicle.

The Stirnraddifferentialgetriebeeinheit has a drive unit 1a which is intended to be connected to the prime mover, which may be formed for example as an internal combustion engine, a hybrid drive machine and / or an electric machine. By means of the drive unit 1a a drive torque is introduced into the Stirnraddifferentialgetriebeeinheit. Further, the Stirnraddifferentialgetriebeeinheit has a first differential output unit 3a and a second differential output unit 4a on, which are intended to be rotatably connected to the drive wheels of a first drive axle. The differential output units 3a . 4a are effective with the drive unit 1a connected. The differential output units 3a . 4a can have a relative rotational movement. The first drive axle, which is designed for example as a front axle, is constantly driven.

The drive unit 1a has a first transmission element 2a on. The two differential output units 3a . 4a have a second and a third gear element 5a . 6a on. The differential output units 3a . 4a are by means of a gear set 14a in terms of effect with the drive unit 1a connected. The three gear elements 2a . 5a . 6a are by means of the gear set 14a educated.

The gear set 14a has a Planetenradpaar 23a with two meshing planet wheels 24a . 25a on. The planet wheels 24a . 25a are on a planet carrier 26a arranged, by means of which the planet wheels 24a . 25a be guided on a circular path. The planet carrier 26a is non-rotatable with the drive unit 1a connected. The first transmission element 2a is as the planet carrier 26a educated.

The planet wheels 24a . 25a are arranged offset from each other in the axial direction. They mesh with each other with a defined part of a tooth width. Furthermore, every planetary gear meshes 24a . 25a with a sun wheel 27a . 28a , The sun wheels 27a . 28a are with the differential output units 3a . 4a connected. The sun wheels 27a . 28a are as the second transmission element 5a the first differential output unit 3a and the third transmission element 6a the second differential output unit 4a educated. The sun wheels 27a . 28a or the differential output units 3a . 4a are arranged coaxially with each other. The planet carrier 26a is also coaxial with the differential output units 3a . 4a arranged.

To block the differential output units 3a . 4a The Stirnraddifferentialgetriebeeinheit has a friction clutch device 7a on, by means of the transmission element 2a the drive unit 1a and the transmission element 5a the differential output unit 3a can be connected to each other. By a connection of the transmission elements 2a . 5a are the drive unit 1a and the differential output unit 3a rotatably connected to each other, whereby a relative rotational movement between the differential output units 3a . 4a is prevented. The Stirnraddifferentialgetriebeeinheit then runs around as a locked gear in which the differential output units 3a . 4a always have the same speed and the drive torque evenly on the two differential output units 3a . 4a is distributed.

The friction clutch device 7a is coaxial with the first differential output unit 3a arranged. In the axial direction is the friction clutch device 7a adjacent to the gear set 14a arranged. The friction clutch device 7a has a first plate carrier 29a and a second plate carrier 30a on. The first plate carrier 29a is fixed to the drive unit 1a connected. It is designed as an outer disc carrier. The second lamellae carrier 30a is fixed to the differential output unit 3a connected. It is designed as an inner disk carrier. The friction clutch device 7a is designed as a wet clutch. To close the friction clutch device 7a is the differential output unit 3a arranged axially displaceable.

The spur gear differential unit comprises a housing unit 19a on, by means of the drive unit 1a and the first plate carrier 29a connected to each other. The housing unit 19a encloses the gear set 14a and the friction clutch device 7a , The housing unit 19a is non-rotatable with the drive unit 1a connected. Next is the housing unit 19a non-rotatable with the first plate carrier 29a connected. The first plate carrier 29a is one-storey with the housing unit 19a executed. In addition, the housing unit 19a rotatably with the planet carrier 26a connected. The housing unit 19a and the differential output units 3a . 4a are rotatably mounted against each other.

To the friction clutch device 7a to close, has the friction clutch device 7a a passive actuator 13a which is independent of an additional actuator. An actuating force, by means of the operating unit 13a is set, is adjusted in response to a torque by means of the gear set 14a on the differential output unit 3a is transmitted. The actuating force is by means of the drive unit 1a initiated drive torque generated.

The operating unit 13a is partially integral with the gear set 14a the Stirnraddifferentialgetriebeeinheit formed. The planet wheel 24a and the sun wheel 27a have intermeshing helical gears, by means of which the torque from the planetary gear 24a on the differential output unit 3a is transmitted. The planet wheel 24a and the sun wheel 27a are as gears 15a . 16a of the gear set 14a formed, which have the helical gears and that for driving the differential output unit 3a are provided. The helical gears act on the differential output unit 3a an axial force, the drive unit via the Differentialab 3a transmitted torque depends. In particular, in a lock mode, the actuating force acts axially outward. By means of the planetary gear 24a and the sun wheel 27a is a mechanical actuation actuator 8a formed, by means of which the friction clutch device 7a can be closed.

To the on the friction clutch device 7a to increase acting actuating force, the actuating unit 13a an actuating means 31a and an axial actuation unit with another mechanical actuation actuator 9a on. The further actuation actuator 9a is effective between the differential output unit 3a and the friction clutch device 7a arranged.

The actuation actuator 9a the Axialbetätigungseinheit has two functional surfaces 11a . 12a on, between which at least one rolling element 32a is arranged. The functional surfaces 11a . 12a are circumferentially limited to each other rotatable. The functional surfaces 11a . 12a have axially extending inclined surfaces. The rolling element 32a is spherical. In principle, other rolling elements, such as roller-shaped or conical rolling elements, are conceivable. By a rotation of the functional surfaces 11a . 12a to each other is an axial space requirement of Betätigungsaktuators 9a changed. By means of a circumferential direction between the functional surfaces 11a . 12a acting force can be generated, an axial force acting to close the friction clutch device 7a can be used. The actuation actuator 9a the Axialbetätigungseinheit has a plurality of rolling elements, which are arranged distributed uniformly in the circumferential direction and of which only the rolling elements 32a is shown.

The functional area 11a is non-rotatable with the formed as an inner disc carrier plate carrier 29a connected. The functional area 12a is by means of a storage device 33a rotatable against the differential output unit 3a , or the gear 16a stored. The functional area 12a is by means of the actuating means 31a non-rotatable with the differential output unit 3a connectable.

The actuating means 31a has a coupling device 34a on, by means of the differential drive unit 3a acting actuating force is actuated. The coupling device 34a is designed as a multi-plate clutch. A first plate carrier 35a the coupling device 34a is rotationally fixed and axially fixed to the differential output unit 3a connected. A second plate carrier 36a the coupling device 34a is non-rotating and axially fixed to the functional surface 12a connected. The storage device 33a is between the plate carrier 35a and the functional area 12a arranged.

In an operating mode in which an axial force acts, which is smaller than a limit value, which is defined by a structure of the Stirnraddifferentialgetriebeeinheit, or in which an axial force in the direction of the second differential output unit 4a acts, is the coupling device 34a open. The functional surfaces 11a . 12a are by means of the rolling element 32a connected with each other. Due to the storage device 33a rotate the functional surfaces 11a . 12a and the differential output unit 3a relative to each other.

In a blocking mode in which an axial force acts which is greater than the limit value, lamellae of the coupling device 34a placed in a frictional contact. The plate carrier 36a the coupling device 34a it supports itself via the Betätigungsaktuator 9a the axial actuator against the plate carrier 29a the friction clutch device 7a from. The plate carrier 36a thus supports against the drive unit 1a , or the housing unit 19a from. Due to the at least partially closed coupling device 34a acts on a relative rotational movement between the drive unit 1a and the differential output unit 3a between the functional surfaces 11a . 12a a directed in the circumferential direction force, which leads to a rotation of the functional surfaces 11a . 12a leads to each other.

Due to the rotation of the functional surfaces 11a . 12a and the training of functional surfaces 11a . 12a By means of the inclined surfaces, an axial force is generated by means of the force directed in the circumferential direction. The axial force acts between the differential output unit 3a and the drive unit 1a , It thus acts in addition to the actuation force of the Betätigungsaktuators generated by the helical gears 8a , The axial force of the Betätigungsaktuators 9a thus amplifies the operating force of Betätigungsaktuators 8a , By increasing the axial actuation force and the force acting in the circumferential direction of the coupling device is also 34a reinforced, causing the axial force of Betätigungsaktuators 9a is further increased. As the Betätigungsaktuator 9a the Axialbetätigungseinheit against the drive unit 1a and the differential output unit 3a supported, the friction coupling device 7a operated and the differential output unit 3a with the drive unit 1a connected.

In the 2 to 4 Further embodiments of the invention are shown. To distinguish the embodiments, the letter a in the reference numerals of the embodiment in the 1 by the letters b to d in the reference numerals of the embodiments in the 2 to 4 replaced. The following description is essentially limited to the differences from the embodiment in the 1 , wherein with respect to the same components, features and functions on the description of the embodiment in the 1 can be referenced.

2 shows an embodiment of a Stirnraddifferentialgetriebeeinheit, which is a modified compared to the first embodiment of an actuator unit 13b having. The operating unit 13b is intended, a friction clutch device 7b for locking differential output units 3b . 4b to operate the Stirnraddifferentialgetriebeeinheit.

The Stirnraddifferentialgetriebeeinheit has a drive unit 1b and the two differential output units 3b . 4b on. The differential output units 3b . 4b are by means of a gear set 14b , the planetary gear pair 23b with two planet wheels 24b . 25b having, operatively connected to the drive unit 1b connected. The planet wheels 24b . 25b be by means of a planet carrier 26b guided, as a first transmission element 2 B the drive unit 1b is trained. The planet carrier 26b is by means of a housing unit 19b with the drive unit 1b connected. sun gears 27b . 28b , each with one of the planetary gears 24b . 25b are a second and third transmission element 5b . 6b the differential output units 3b . 4b educated.

Further, the Stirnraddifferentialgetriebeeinheit the friction clutch device 7b on that for blocking the differential output units 3b . 4b is provided. By means of the friction clutch device 7b can the transmission elements 5b . 6b the differential output units 3b . 4b be connected to each other. The Stirnraddifferentialgetriebeeinheit then runs around as a locked gear, the drive torque evenly on the two differential output units 3b . 4b distributed.

The friction clutch device 7b is coaxial with the differential output units 3b . 4b arranged. In the axial direction is the friction clutch device 7b partially overlapping with the gear set 14b arranged. In the radial direction is the friction clutch device 7b within the planet carrier 26b arranged. The friction clutch device 7b has a first designed as an outer disc carrier plate carrier 29b and a second disc carrier configured as an inner disc carrier 30b on. The first plate carrier 29b is non-rotatable with the differential output unit 3b connected. The second plate carrier 30b is non-rotatable with the differential output unit 4b connected. The friction clutch device 7b is designed as a wet clutch.

To the friction clutch device 7b to close, the friction clutch device, the actuator unit 13b on, which is designed as a passive actuator unit. An actuating force, by means of the operating unit 13b is adjusted depending on torques by means of the gear set 14b on the differential output units 3b . 4b be transmitted. The actuating force is by means of the drive unit 1b initiated drive torque generated.

The operating unit 13b is partially integral with the gear set 14b the Stirnraddifferentialgetriebeeinheit formed. The planet wheels 24b . 25b and the sun wheels 27b . 28b are as gears 15b . 16b . 17b . 18b executed with each intermeshing helical gears, by means of which the torque of the planetary gears 24b . 25b on the differential output units 3b . 4b is transmitted. The helical gears act on the differential output units 3b . 4b an axial operating force, that of the on the differential output units 3b . 4b transmitted torques depends. The planet wheel 24b and the sun wheel 27b form a first mechanical Betätigungsaktuator 8b by means of the via the differential output unit 3b guided torque generates a first axial operating force. The planet wheel 25b and the sun wheel 28b form a second mechanical Betätigungsaktuator 10b by means of the via the differential output unit 4b ge guided torque generates a second axial actuating force. In a lock-up mode, the first and second actuation forces act in opposite directions due to a different configuration of the helical gears. Both forces act axially inward, causing the differential output units 3b . 4b be moved against each other. By means of the two actuation actuators 8b . 10b can the friction clutch device 7b getting closed.

To the on the friction clutch device 7b to increase acting actuating force, the actuating unit 13b an actuating means 31b and an axial actuation unit with another mechanical actuation actuator 9b on. The further actuation actuator 9b is effective between the differential output units 3b . 4b arranged.

The actuation actuator 9b has two functional surfaces 11b . 12b with axially extending inclined surfaces, between which a ball, conical or roller-shaped rolling elements 32b is arranged. By a rotation of the functional surfaces 11b . 12b To each other, an axially acting force can be generated on the friction clutch device 7b acts. To generate the axial force acting is the first functional surface 11b rotatably with the slats carrier 29b the friction clutch device 7b connected. The second functional area 12b is by means of the actuating means 31b with the second differential output unit 4b connectable.

The operating unit 13b has a coupling device 34b on, by means of by the differential drive units 3b . 4b acting actuating force is actuated. The coupling device 34b is designed as a multi-plate clutch. A first plate carrier 35b the coupling device is non-rotatable with the differential output unit 4b connected. A second plate carrier 36b the coupling device 34b is non-rotatable with the functional surface 12b connected. Between the plate carrier 35b and the functional area 12b is a storage device 33b arranged.

In the blocking mode, in which the differential output units rotate relative to each other and are to be locked against each other, fins of the coupling device 34b by means of the actuation actuators 8b . 10b acting axial actuating force brought into a frictional contact and the functional surfaces 11b . 12b twist against each other. Due to the rotation of the functional surfaces 11b . 12b and the training of functional surfaces 11b . 12b By means of the inclined surfaces, an axial force is generated between the differential output units 3b . 4b acts. As the Betätigungsaktuator 9b at the two differential output units 3b . 4b supported, the friction coupling device 7b operated and the differential output units 3b . 4b interconnected, whereby the Stirnraddifferentialgetriebeeinheit is locked.

3 shows a further embodiment of a Stirnraddifferentialgetriebeeinheit. In contrast to the embodiment 1 The Stirnraddifferentialgetriebeeinheit has a partially active operating unit 13c which is intended to a friction clutch device 7c for locking differential output units of the Stirnraddifferentialgetriebeeinheit to operate.

The Stirnraddifferentialgetriebeeinheit has a drive unit 1c and two differential output units 3c . 4c on. The differential output units 3c . 4c are by means of a gear set 14c , the planetary gear pair 23c with two planet wheels 24c . 25c having, operatively connected to the drive unit 1c connected. A planet carrier 26c is as a first transmission element 2c the drive unit 1c educated. The planet carrier 26c is by means of a housing unit 19c with the drive unit 1c connected. sun gears 27c . 28c , each with one of the planetary gears 24c . 25c are a second and third transmission element 5c . 6c the differential output units 3c . 4c educated.

To block the differential output units 3c . 4c The Stirnraddifferentialgetriebeeinheit has the friction clutch device 7c on. By means of the friction clutch device 7c can the transmission element 5c the differential output unit 3c and the transmission element 2c the drive unit 1c interconnected, whereby the Stirnraddifferentialgetriebeeinheit is locked and rotates as a locked gear.

The friction clutch device 7c is in the axial direction adjacent to the gear set 14c arranged. The friction clutch device 7c includes a first designed as an outer disc carrier plate carrier 29c , which rotates with the drive unit 1c is connected, and a second designed as an inner disc carrier plate carrier 30c , which rotates with the differential output unit 3c connected is.

To the friction clutch device 7c to close, has the friction clutch device 7c the operating unit 13c on. The operating unit 13c has an active actuating actuator 8c , an actuating means 31c and an axial actuating unit with a mechanical actuating actuator 9c on. The axial actuation unit is intended to be that of the active Betätigungsaktuator 8c generated actuating force by means of the passive Betätigungsaktuators 9c to increase.

The actuation actuator 9c the Axialbetätigungseinheit has two functional surfaces 11c . 12c on, between which a rolling element 32c is arranged. The first functional area 11c is non-rotatable with the plate carrier 30c the friction clutch device and thus with the differential output unit 3c connected. The second functional area 12c is by means of the actuator unit 13c with the drive unit 1c connectable.

The actuating means 31c has a coupling device 34c on. The coupling device 34c is by means of the active Betätigungsaktuators 8c actuated. The coupling device 34c is designed as a multi-plate clutch. A first plate carrier 35c the coupling device 34c is non-rotatable with the housing unit 19c connected. A second plate carrier 36c the coupling device 34c is non-rotatable with the functional surface 11c connected.

In the lock-up mode, in which the differential output units rotate relative to each other and the spur gear differential unit is to be locked, fins become the coupling device 34c placed in a frictional contact and the functional surfaces 11c . 12c twist against each other. Due to the rotation of the functional surfaces 11c . 12c and the training of functional surfaces 11c . 12c By means of the inclined surfaces, an axial force is generated between the differential output unit 3c and the drive unit 1c acts. As the Betätigungsaktuator 9c at the differential output unit 3c and the drive unit 1c supported, the friction coupling device 7c operated and locked the Stirnraddifferentialgetriebeeinheit.

4 shows a Stirnraddifferentialgetriebeeinheit, which is a secondary drive unit 20d has to drive a further unit. The Stirnraddifferentialgetriebeeinheit is particularly intended for a motor vehicle having more than one driven axle, wherein a first means of differential output units 3d . 4d driven axle is permanently driven and a second axle, by means of the secondary drive unit 20d is driven, can be switched on when needed.

The differential output unit 3d is by means of a friction clutch device 7d connectable to the drive unit. By means of the friction clutch device 7d the spur gear differential unit can be locked. An embodiment of the friction clutch device 7d and an operating unit 13d , the two mechanical, passive actuation actuators 8c . 9c has, is analogous to the first embodiment.

The Stirnraddifferentialgetriebeeinheit has a drive unit 1d on, by means of which a drive torque is introduced into the Stirnraddifferentialgetriebeeinheit. The differential output units 3d . 4d are by means of a gear set 14d in terms of effect with the drive unit 1d connected.

The secondary drive unit 20d is coaxial with the differential output unit 3d arranged. It is partially designed as a hollow shaft, that of the differential output unit 3d is enforced. To the secondary drive unit 20d if necessary with the drive unit 1d To connect, the Stirnraddifferentialgetriebeeinheit has a coupling device 21d on that in a power flow between the drive unit 1d and the secondary drive unit 20d is arranged. The coupling device 21d is designed as a Reiblamellenkupplungsvorrichtung.

The coupling device 21d is coaxial with the differential output unit 4d arranged. In the axial direction is the coupling device 21d adjacent to the gear set 14d arranged. The coupling device 21d has a first plate carrier 37d and a second plate carrier 38d on. The first plate carrier 37d is non-rotatable with the drive unit 1d connected. It is designed as an outer disc carrier. The second plate carrier 38d is non-rotatable with the secondary drive unit 20d connected. It is designed as an inner disk carrier. The coupling device 21d is designed as a wet clutch.

To the coupling device 21d to close, has the coupling device 21 a passive actuator 22d which is independent of an additional actuator. An actuating force, by means of the operating unit 22d is set, is adjusted in response to a torque by means of the gear set 14d on the differential output unit 4d is transmitted. The actuating force is by means of the drive unit 1d initiated drive torque generated.

The operating unit 22d is partially integral with the gear set 14d educated. A planetary gear 25d and a sun wheel 28d are as gears 17d . 18d formed, the intermeshing helical gears, by means of which the torque from the planet gear 25d on the differential output unit 4d is transmitted. The helical toothing acts on the differential output unit 4d an axial operating force from that via the differential output unit 4d transmitted torque depends. By means of the gear 17d and the gear 18d is a passive, mechanical actuation actuator 39d formed, by means of which the coupling device 21d is pressed.

In order to increase an actuating force, the actuator unit 22d an actuating means 40d and an axial actuation unit with another mechanical actuation actuator 41d on. The further actuation actuator 41d is effective between the differential output unit 4d and the coupling device 21d arranged. The actuation actuator 41d is intended to generate by means of a force acting in the circumferential direction of an axial force, in turn, the coupling device 21d locks.

The actuation actuator 41d the Axialbetätigungseinheit has two functional surfaces 42d . 43d on, between which a rolling element 44d is arranged. The functional surfaces 42d . 43d have axially extending inclined surfaces. The rolling element 44d is spherical, conical or roller-shaped and between the functional surfaces 42d . 43d arranged. The functional surfaces 42d . 43d are circumferentially limited to each other rotatable. By a rotation of the functional surfaces 42d . 43d to each other is an axial space requirement of Betätigungsaktuators 41d changed. By means of a circumferential Rich tion between the functional surfaces 42d . 43d acting force can be generated, an axial force acting to close the coupling device 21d is used. The actuation actuator 41d the Axialbetätigungseinheit has a plurality of rolling elements, which are arranged distributed uniformly in the circumferential direction and of which only the rolling elements 44d is shown.

The functional area 43d is non-rotatable with the formed as an inner disc carrier plate carrier 38d connected. The functional area 42d is by means of a storage device 45d rotatable against the differential output unit 4d , or the gear 18d stored. The functional area 42d is by means of the actuating means 40d with the second differential output unit 4d connectable.

The actuating means 40d has a coupling device 46d on, by means of the differential output unit 4d acting actuating force is actuated. The coupling device 46d is designed as a multi-plate clutch. A first plate carrier 47d the coupling device 46d is non-rotatable with the differential output unit 4d connected. A second plate carrier 48d the coupling device 46d is non-rotatable with the functional surface 43d connected. The storage device 45d is between the plate carrier 47d and the functional area 42d arranged.

In a blocking mode, slats of the coupling device 46d placed in a frictional contact. Due to the at least partially closed coupling device 46d acts between the functional areas 42d . 43d a directed in the circumferential direction force, which leads to a rotation of the functional surfaces 42d . 43d leads to each other. Due to the rotation of the functional surfaces 42d . 43d and the training of functional surfaces 42d . 43d By means of the inclined surfaces, the force directed in the circumferential direction is converted into an axial force. The axial force acts between the differential output unit 3d and the drive unit 1d , The axial force of the Betätigungsaktuators 41d is significantly higher than the operating force of the first Betätigungsaktuators 39d , whereby the coupling device 34d closed and the secondary drive unit 20d with the drive unit 1d is connected.

1

drive unit

2

gear element

3

Differential output unit

4

Differential output unit

5

gear element

6

gear element

7

friction clutch

8th

Betätigungsaktuator

9

Betätigungsaktuator

10

Betätigungsaktuator

11

functional surface

12

functional surface

13

operating unit

14

gearset

15

gear

16

gear

17

gear

18

gear

19

housing unit

20

Secondary driven unit

21

coupling device

22

operating unit

23

planet wheel

24

planet

25

planet

26

planet

27

sun

28

sun

29

plate carrier

30

plate carrier

31

actuating means

32

rolling elements

33

bearing device

34

coupling device

35

plate carrier

36

plate carrier

37

plate carrier

38

plate carrier

39

Betätigungsaktuator

40

actuating means

41

Betätigungsaktuator

42

functional surface

43

functional surface

44

rolling elements

45

bearing device

46

coupling device

47

plate carrier

48

plate carrier

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 102005007726 A1 [0002]

Claims (14)

Spur gear differential unit with a drive unit ( 1a ; 1b ; 1c ; 1d ), which is a first transmission element ( 2a ; 2 B ; 2c ; 2d ), with two differential output units ( 3a . 4a ; 3b . 4b ; 3c . 4c ; 3d . 4d ), a second and a third transmission element ( 5a . 6a ; 5b . 6b ; 5c . 6c ; 5d . 6d ), and with a friction clutch device ( 7a ; 7b ; 7c ; 7d ), which is intended to at least two of the transmission elements ( 2a . 5a ; 5b . 6b ; 2c . 5c ; 2d . 5d ), characterized in that the friction coupling device ( 7a ; 7b ; 7c ; 7d ) at least one mechanical Betätigungsaktuator ( 8a . 9a ; 8b . 9b . 10b ; 9c ; 8d . 9d ) having. Stirnraddifferentialgetriebeeinheit according to claim 1, characterized in that the Betätigungsaktuator ( 9a ; 9b ; 9c ; 9d ) at least one functional area ( 11a . 12a ; 11b . 12b ; 11c . 12c ; 11d . 12d ) for generating an axial force. Stirnraddifferentialgetriebeeinheit according to claim 1 or 2, characterized in that the friction clutch device ( 7a ; 7b ; 7c ; 7d ) an at least partially passive actuator unit ( 13a ; 13b ; 13c ; 13d ) having. Spurraddifferential according to claim 3, characterized in that the passive actuating unit, the mechanical Betätigungsaktuator ( 8a . 9a ; 8b . 9b . 10b ; 8c . 9c ; 9d ) having. Stirnraddifferentialgetriebeeinheit according to any one of the preceding claims, characterized by a gear set ( 14a ; 14b ; 14d ) at least partially integral with the Betätigungsaktuator ( 8a ; 8b ; 8d ) is executed. Spurraddifferentialgetriebeeinheit according to claim 5, characterized in that the gear set ( 14a ; 14b ; 14d ) at least one helical gear ( 15a . 16a ; 15b . 16b . 17b . 18b ; 15d . 16d ), which is suitable for driving at least one of the differential output units ( 2a ; 2 B . 3b ; 2d ) is provided. Stirnraddifferentialgetriebeeinheit according to any one of the preceding claims, characterized in that the friction clutch device (7c) an active Betätigungsaktuator ( 8c ), which is provided for generating an axial force. Stirnraddifferentialgetriebeeinheit according to any one of the preceding claims, characterized in that the Reibkupplungsvorrichtung ( 7a ; 7c ; 7d ) is provided to the transmission element ( 2a ; 2c ; 2d ) of the drive unit ( 1a ; 1c ; 1d ) with at least one of the transmission elements ( 5a ; 5c ; 5d ) of the differential output units ( 3a ; 3c ; 3d ) connect to. Stirnraddifferentialgetriebeeinheit according to any one of the preceding claims, characterized in that the Reibkupplungsvorrichtung ( 7b ) is provided, the transmission elements ( 5b . 6b ) of the differential output units ( 3b . 4b ) to connect with each other. Stirnraddifferentialgetriebeeinheit according to any one of the preceding claims, characterized by a housing unit ( 19a ; 19c ; 19d ) which at least partially integral with at least a part of the friction clutch device ( 7a ; 7c ; 7d ) is executed. Stirnraddifferentialgetriebeeinheit according to any one of the preceding claims, characterized in that the Reibkupplungsvorrichtung ( 7a ; 7b ; 7c ; 7d ) is designed as a Reiblamellenkupplung. Stirnraddifferentialgetriebeeinheit according to any one of the preceding claims, characterized by a secondary drive unit ( 20d ) and a coupling device ( 21d ) intended to connect the secondary drive unit ( 20d ) with the drive unit ( 1d ) connect to. Stirnraddifferentialgetriebeeinheit according to claim 12, characterized in that the coupling device ( 21d ) an at least partially passive actuator unit ( 22d ) having. Stirnraddifferentialgetriebeeinheit according to claim 12 or 13, characterized in that the coupling device ( 21d ) at least one mechanical Betätigungsaktuator ( 39d . 41d ) having.