WO2011020456A1

WO2011020456A1 - Intermediate wall and motor vehicle transmission

Info

Publication number: WO2011020456A1
Application number: PCT/DE2010/000911
Authority: WO
Inventors: Markus Kneissler
Original assignee: Schaeffler Technologies Gmbh & Co. Kg
Priority date: 2009-08-20
Filing date: 2010-08-02
Publication date: 2011-02-24
Also published as: CN102483104A; DE102010033070A1; CN102483104B; DE112010003313A5; DE112010003313B4

Abstract

An intermediate wall (46) for a motor vehicle transmission, particularly a dual clutch transmission, has a wall body (50) for fixing the intermediate wall in at least one housing part. According to the invention, the intermediate wall has a shaft bearing (44), which is received by the wall body and which supports a torque-introducing shaft (24), and a support bearing (48), which is received by the wall body and which supports a clutch cylinder (54) of a transmission clutch, particularly a wet clutch, for coupling the torque-introducing shaft and a transmission input shaft. The connection of the shaft bearing and the support bearing to the intermediate wall simplifies the design of the motor vehicle transmission and reduces tolerances in a radial direction.

Description

Partition wall and motor vehicle transmission

The invention relates to an intermediate wall for a motor vehicle transmission and a motor vehicle transmission, in particular dual-clutch transmission, with the help of which transmission components can be positioned within the motor vehicle transmission.

WO 2006/086704 A2 discloses a dual-clutch transmission in which two different transmission input shafts are mounted via an intermediate wall in each case. The intermediate wall is screwed between a first housing part and a second housing part with the housing parts. The power flow from a motor via a chain drive to a starter ring, which is connected via a gear coupling with a hollow shaft, which in turn is connected to the transmission input shaft. Between the transmission input shaft and the starter ring a plurality of concentrically arranged components are provided to form a hydraulic channel to a slave cylinder of the transmission clutch can.

A disadvantage of such a motor vehicle transmission that the structure is relatively complicated and several components with tight tolerances must be connected to each other.

It is the object of the invention to provide a measure and to provide a motor vehicle transmission, with the aid of which the structure of the motor vehicle transmission can be simplified and tolerances can be reduced.

The object is achieved by an intermediate wall with the

Features of claim 1 and by a motor vehicle transmission with the features of claim 6. Advantageous embodiments of the invention are specified in the dependent claims.

The partition according to the invention for a motor vehicle transmission, in particular

Double clutch transmission, has a wall body for fixing the partition with at least one housing part. According to the invention, a shaft bearing received by the wall body for supporting a torque introduction shaft and a support bearing received by the wall body for supporting a clutch cylinder of a drive clutch, in particular wet clutch, provided for coupling the torque introduction shaft with a transmission input shaft.

Characterized in that the shaft bearing and the support bearing are connected to the intermediate wall, the storage of the torque introduction shaft and the mounting of the clutch cylinder can be simplified. At the same time, a plurality of nested components, whose tolerances would accumulate, are avoided, so that the tolerances are reduced. In particular, the tolerance of the clutch cylinder in the radial direction is particularly low, so that wear at the contact points to the coupling elements and torque fluctuations are minimized by misalignment and angular error between the waves. In addition, the intermediate wall can be easily mounted by the intermediate wall is simply pushed, for example, on the torque introduction shaft and / or the transmission input shaft. Geometrically complicated manufactured components are thereby avoided, so that the manufacturing wall and the manufacturing costs are reduced. Furthermore, the space required can be reduced in particular in the axial direction by parts of the transmission clutch can be integrated into the intermediate wall. The torque introduction shaft is in the power flow direction from the engine in front of the transmission clutch while the transmission input shaft is in the power flow direction behind the transmission clutch. The torque introduction shaft may be directly or indirectly connected to a starter ring and / or a crankshaft of an engine. The transmission input shaft can pass on the torque acting on the closed clutch to individual gears and can be connected directly or indirectly via a transmission output, in particular via a differential gear with a drive axle. The intermediate wall is in particular fixed, that is, immovable relative to the torque introduction shaft fixed. The intermediate wall may in particular be rigidly connected to housing parts of a transmission housing. Due to the particular solid connection of the intermediate wall to the transmission housing, it is not necessary to connect the intermediate wall over a tolerance bearing bearing with the transmission housing.

Preferably, the wall body on a slave cylinder for the hydraulic actuation of the transmission clutch. Due to the at least partial integration of the slave cylinder in the wall body of the partition, the space occupied by the intermediate wall space can be optimally used. Other components in the axial direction to the intermediate wall are not required to form the slave cylinder. The slave cylinder may in particular be designed annular and preferably be arranged concentrically to the torque introduction shaft and / or to the transmission input shaft. Such a slave cylinder is Also, for example, when a driver depresses a clutch pedal, the slave cylinder may be hydraulically pressurized, whereby an actuator of the transmission clutch may be disengaged from the slave cylinder to engage the clutch elements To bring the transmission clutch in frictional contact.

In particular, the wall body has a hydraulic channel for connection to a

Slave cylinder on. The hydraulic channel can be introduced for example as a blind hole in the radial direction in the wall body of the intermediate wall. Through an opening in the radial direction, this opening can also be formed by slave cylinder itself, the hydraulic channel can be easily connected hydraulically to the slave cylinder. In particular, when the intermediate wall is arranged between two housing parts of the transmission housing, a hydraulic passage through the transmission housing via the partition can be achieved in a particularly simple manner. Hydraulic hoses inside the motor vehicle transmission are not required to pressurize the slave cylinder can.

The wall body particularly preferably has a fastening element for receiving a substantially ceiling-shaped wet-room seal. Since the intermediate wall can extend up to a housing wall of the gear housing, it is possible to connect the wet room seal particularly far radially outside with the intermediate wall. This makes it possible to embrace a plurality of components arranged radially within the wet-space seal of the wet-room seal, so that a corresponding number of components, in particular a gear coupling designed as a wet clutch, can be arranged in an oil chamber of the motor vehicle transmission. In this case, the wet-room seal can, in particular, embrace the torque introduction shaft and / or the transmission input shaft at the end, in order to separate the oil space from a drying space. Radially inside, the wet seal, for example, via a radial shaft seal on a particular rotating at engine speed power transmission element, such as a starter ring or a flywheel, sealingly.

In particular, the wall body can be a passage opening for the game-afflicted

Implementation of the torque introduction shaft and / or the transmission input shaft. During assembly, in this case, the intermediate wall can be simply plugged onto the torque introduction shaft and / or the transmission input shaft or the torque Inlet shaft and / or the transmission input shaft can be easily inserted into the partition. Due to the clear play of the passage opening a simple assembly is then ensured and at the same time already achieved a first orientation of the torque introduction shaft and / or the transmission input shaft via the intermediate wall, so that the connection of the wall body with the torque introduction shaft via the shaft bearing is simplified accordingly.

The invention further relates to a motor vehicle transmission, in particular dual-clutch transmission, which has a torque input shaft connectable to an engine output and a transmission input shaft connectable to a transmission output. Further, a transmission clutch for coupling the torque introduction shaft is provided with the transmission input shaft. According to the invention an attachable with a housing part intermediate wall for supporting both the torque input shaft and for mounting a clutch cylinder of the transmission clutch is provided. In particular, the intermediate wall may be formed and developed as described above. Characterized in that the intermediate wall supports both the torque introduction shaft and the clutch cylinder, the structure of the motor vehicle transmission can be significantly simplified. In particular, several concentric nested components are avoided, so that the tolerances in the radial direction are less and less.

Preferably, the intermediate wall is arranged in the axial direction between the transmission clutch and a starter ring which can be connected to a motor for introducing force onto the torque introduction shaft. Relative to the intermediate wall, the starter ring, a crankshaft and / or a flywheel can be arranged in one direction from the intermediate wall, wherein in the other direction the transmission clutch, the transmission input shaft and / or the individual gears can be arranged. In particular, in the axial direction on one side of the shaft bearing and on the other side, the support bearing may be connected to the wall body of the intermediate wall. Because the coupling region with the transmission clutch and the force introduction region with the starter ring and the crankshaft are separated via the intermediate wall, it is not necessary to arrange components of one region concentrically with components of the other region, thereby avoiding accumulating tolerances in the radial direction. Instead, both sides of the wall body can be used for supporting and / or fastening of components in the axial direction, whereby the structure of the motor vehicle transmission can be simplified. In particular, the clutch cylinder has a first cylinder portion, to which a first clutch element set is connected, and a second cylinder portion for connection to the support bearing, wherein the second cylinder portion has a different diameter from the first cylinder portion. The diameter of the second cylinder section is in particular smaller than the diameter of the first cylinder section. The first cylinder portion and the second cylinder portion may be substantially completely juxtaposed and, for example, be joined together in a jump-like manner via a step-shaped course in cross section. It is also possible for the first cylinder section and the second cylinder section to be arranged substantially coaxially relative to one another and to be connected, for example, via a substantially C-shaped connection, which has been produced in particular by forming. Due to the different diameter of the first cylinder portion and the second cylinder portion, it is not necessary that the outer diameter of the support bearing corresponds to the diameter of the first cylinder portion. In particular, a support bearing with a significantly smaller diameter can be used without it being necessary to reduce the diameter of the first cylinder section as well. The diameter of the first cylinder section can in particular be chosen to be particularly large in order to be able to optimally utilize the installation space in the radial direction. This makes it possible to provide the largest possible friction surface between the first coupling element set and the second coupling element set. Due to the large friction surface, it is possible to reduce the number of coupling elements and thus to reduce the space of the transmission clutch in the axial direction.

In particular, the intermediate wall can be connected to a substantially ceiling-shaped wet-room seal, wherein the wet-space seal separates an oil space from a drying space and the transmission coupling is arranged completely in the oil space. The transmission clutch can thus be operated as a wet clutch, which can improve the heat dissipation during coupling. The wet-space seal may, for example, be of substantially annular design and embrace an end face of the torque introduction shaft and / or of the transmission input shaft in the shape of an umbrella. The wet-space seal may in particular be connected radially on the outside to the intermediate wall and may rest in a sealing manner radially inward, in particular via a radial shaft sealing ring, for example, on an extension of the crankshaft or the starter ring.

In particular, the intermediate wall has a shaft bearing for mounting the torque introduction shaft and a support bearing for mounting the clutch cylinder, wherein the shaft bearing and the support bearing are arranged in the oil chamber. Both the shaft bearing and the Support bearings can be lubricated well, which increases the life. The shaft bearing and the support bearing can be securely attached to a corresponding projection and / or in a corresponding recess of the wall body of the intermediate wall.

Particularly preferably, the wet-space seal has a shoulder for the radial arrangement of at least one part of a starter ring and / or at least part of a weight body of a centrifugal pendulum. In particular, a pre-translation between the starter ring and the torque introduction shaft can be made radially inward to the torque introduction shaft, so that space for the starter ring and / or the centrifugal pendulum can be created radially outward to the torque introduction shaft by an appropriate design of the wet-space seal. The centrifugal pendulum may be connected to a flywheel, which in turn may be connected to the crankshaft. The starter ring may be connected to the flywheel and / or to the crankshaft.

Preferably, an oil pump operated at substantially engine speed is provided in the oil region, wherein the oil pump is in particular connected to a housing part, in particular a driven shaft, which is driven at substantially engine speed. The oil pump may be designed, for example, as a gear pump, wherein in particular the inner gear of the gear pump is attached to the driven motor speed housing part. This allows a very compact and space-efficient design of the oil pump.

In particular, the torque introduction shaft has a hollow channel, wherein the

Hollow channel is connected in particular with an oil line. This makes it possible to pump oil into the oil region of the motor vehicle transmission via the torque introduction shaft and in particular to supply the transmission designed as a wet clutch transmission pump clutch with oil.

Preferably, the transmission clutch and the intermediate wall is arranged at an end pointing to an engine or at an end facing away from the engine of the transmission input shaft. The transmission clutch and the intermediate wall can thus be arranged in particular either in the region of one end or of the other end of the transmission input shaft. The gear wheels of the individual gears can be arranged directly behind one another. In particular, when the transmission clutch and the intermediate wall are arranged at the end of the transmission input shaft facing away from the engine, it is possible to arrange a differential gear further center in a motor vehicle, whereby the length of the shortest drive shaft for the drive wheels can be extended.

In particular, a first housing part and a second housing part are provided and the intermediate wall is arranged between the first housing part and the second housing part. The intermediate wall may for example have an outer flange, so that the intermediate wall can be clamped in a screwing of the first housing part with the second housing part between the first housing part and the second housing part. The intermediate wall can in particular form a part of the outside of the transmission housing. The partition can alternatively be integrated in one of the two housing parts.

The invention will now be described by way of example with reference to the accompanying drawings with reference to preferred embodiments thereof.

Show it:

1 shows a schematic sectional view of a part of a motor vehicle transmission in a first embodiment and

2 shows a schematic sectional view of a part of a motor vehicle transmission in a second embodiment.

The motor vehicle transmission 10 shown in FIG. 1 has a crankshaft 12, to which a flywheel 14 is connected. In the illustrated embodiment, a weight body 16 of a centrifugal pendulum 18 is slidably connected to the flywheel 14. With the flywheel 14, a starter ring 20 is connected, which is connected via a pre-translation 22 with a torque introduction shaft 24. The torque introduction shaft 24 is designed as a hollow shaft and has a hollow channel 26. The hollow channel 26 is hydraulically connected to an oil supply 28, from which via the oil passage 26 via a radial opening 30 oil in a trained as a wet clutch transmission clutch 32 can be pumped. The transmission clutch 32 has a clutch cylinder 34, which has a first cylinder portion 36 and a second cylinder portion 38, wherein the second cylinder portion 38 has a smaller diameter than the first cylinder portion 36. With the first cylinder portion 36 is a first coupling element set with a plurality of first coupling elements 40 connected, which can produce a frictional connection with second coupling elements 42. The second coupling elements 42 are connected to the torque introduction shaft 24.

The torque introduction shaft 24 is connected via a shaft bearing 44 with an intermediate wall 46. With the intermediate wall 46, the clutch cylinder 34 is also rotatably connected via a support bearing 48. In a wall body 50 in the intermediate wall 46, a slave cylinder 52 is integrated, which can be acted upon via a provided in the wall body 50 of the intermediate wall 46 hydraulic channel 54 with the pressure to disengage an actuator 56 can. By the actuating element 56, the first plate elements 40 can be pressed onto the second plate elements 42. The intermediate wall 46 further has a fastening element 57 with which a substantially ceiling-shaped wet-room seal 58 is fastened. The wet-room seal 58 has, radially on the outside, a shoulder 60, through which the wet-room seal 58 springs back onto the intermediate wall 46. By paragraph 60, it is possible to put the starter ring 20 in this area something to the intermediate wall 46 and to create enough space for the weight body 16 of the centrifugal pendulum 18.

The intermediate wall 46 further has a passage opening 61 through which the torque introduction shaft 24 and / or a transmission input shaft 62 can be performed with play. The torque introduction shaft 24 is rotatably supported by a needle bearing 64 within the transmission input shaft 62. Via a connecting plate 66, the transmission input shaft 62 is connected to the clutch cylinder 34 and thereby to the first coupling elements 40. The connecting plate 66 may be connected via a toothing or the like with the transmission input shaft 62, so that in the circumferential direction a frictional connection takes place, while in the axial direction, the connecting plate 66 can be moved relative to the transmission input shaft 62. Thereby, the relative movement of the connecting plate 66 due to the displacement of the clutch cylinder 34 when closing the transmission clutch 32 can be compensated.

In the motor vehicle transmission 10 shown in FIG. 2, in contrast to the vehicle transmission 10 shown in FIG. 1, the transmission clutch 32 and the intermediate wall 46 are not arranged at the end of the transmission input shaft 62 facing the engine, but at the end of the transmission input shaft 62 facing away from the engine The wall body 50 of the intermediate wall 46 is fastened between a first housing part 68 and a second housing part 70 such that the intermediate wall 46 forms part of the outside of the gear housing. In the illustrated embodiment, a shaft 72 is provided in the radially inner region, which is connected via the starter ring 20 with the crankshaft 12 and thereby driven at engine speed. With the shaft 72, an oil pump 74 is connected, which is formed for example as a gear pump, the inner gear may be connected to the shaft 72. The oil pump 74 can pump oil into the hollow channel 26 of the torque introduction shaft 24 via an oil line 76. The shaft 72 may be supported and supported via another bearing 78. The bearing 78 can be performed, for example, as a needle bearing or roller bearings. The pump 74 may be connected to the shaft 72 via a gearing or similar axially displaceable connection to compensate for tolerances and temperature differences between the housing parts 68, 70 and the shaft 72. The shaft 72 can be designed so that the shaft 72 acts as a torsional vibration damper due to its Torsionsstei-.

The centrifugal pendulum arranged on the motor side in the exemplary embodiments can alternatively be arranged at the end facing away from the engine. Furthermore, the centrifugal pendulum can be replaced by a resilient element for torsional vibration damping, for example, a dual-mass flywheel.

LIST OF REFERENCE NUMBERS

Motor vehicle transmission

crankshaft

flywheel

body weight

centrifugal pendulum

starter wreath

pre-translation

Torque input shaft

hollow channel

oil supply

opening

transmission clutch

clutch cylinder

First cylinder section

Second cylinder section

First coupling elements

Second coupling elements

shaft bearing

partition

support bearings

wall body

slave cylinder

hydraulic channel

actuator

fastener

Wet Room Seal

paragraph

Through opening

Transmission input shaft

needle roller bearings

connecting plate

first housing part second housing part

wave

oil pump

Oil pipe another camp

Claims

claims

1. partition for a motor vehicle transmission (10), in particular dual-clutch transmission, with

a wall body (50) for fastening the intermediate wall (46) with at least one housing part (68, 70),

one of the wall body (50) received shaft bearing (44) for supporting a torque introduction shaft (24) and

a support bearing (48) accommodated by the wall body (50) for supporting a clutch cylinder (34) of a transmission clutch (32), in particular a wet clutch, for coupling the torque introduction shaft (24) to a transmission input shaft (62).

2. partition according to claim 1, characterized in that the wall body (50) has a slave cylinder (52) for the hydraulic actuation of the transmission clutch (32).

3. intermediate wall according to claim 1 or 2, characterized in that the wall body (50) has a hydraulic channel (54) for connection to a slave cylinder (52).

4. intermediate wall according to one of claims 1 to 3, characterized in that the wall body (50) has a fastening element (57) for receiving a substantially ceiling-shaped wet space seal (58).

5. intermediate wall according to one of claims 1 to 4, characterized in that the wall body (50) has a passage opening (61) for play carrying through the torque introduction shaft (24) and / or the transmission input shaft (62).

6. Motor vehicle transmission, in particular dual-clutch transmission, with

a torque input shaft (24) connectable to an engine output, a transmission input shaft (62) connectable to a transmission output, and a transmission clutch (32) for coupling the torque introduction shaft (24) to the transmission input shaft (62)

characterized in that

a with a housing part (68, 70) attachable intermediate wall (46), in particular according to one of claims 1 to 5, for supporting both the Drehmomenteinleitungswelle (24) and for mounting a clutch cylinder (34) of the transmission clutch (32) is provided.

7. Motor vehicle transmission according to claim 6, characterized in that the intermediate wall (46) in the axial direction between the transmission clutch (32) and a motor-connectable starter ring (20) for introducing force to the torque introduction shaft (24) is arranged.

8. motor vehicle transmission according to claim 6 or 7, characterized in that the coupling cylinder (34) has a first cylinder portion (36) to which a first coupling element set (40) is connected, and a second cylinder portion (38) for connection to the support bearing (48). wherein the second cylinder portion (38) has a different diameter from the first cylinder portion (36), wherein the diameter of the second cylinder portion (38) is smaller than the diameter of the first cylinder portion (36).

9. motor vehicle transmission according to one of claims 6 to 8, characterized in that with the intermediate wall (46) is a substantially decker-shaped wet seal (58) is connected, wherein the wet-space seal (58) separates an oil chamber from a drying room and the transmission clutch (32) completely is arranged in the oil room.

10. motor vehicle transmission according to claim 9, characterized in that the intermediate wall (46) has a shaft bearing (44) for supporting the Drehmomenteinleitungswelle (24) and a support bearing (48) for mounting the clutch cylinder (34), wherein the shaft bearing (44) and the support bearing (48) are arranged in the oil room.

11. Motor vehicle transmission according to claim 9 or 10, characterized in that the wet-space seal (58) has a shoulder (60) for the radial arrangement of at least one Part of a starter ring (20) and / or at least part of a weight body (16) of a centrifugal pendulum (18).

12. Motor vehicle transmission according to one of claims 9 to 11, characterized in that a substantially operated with engine speed oil pump (74) is provided in the oil region, wherein the oil pump (74) is in particular connected to a substantially motor speed driven shaft (72).

13. Motor vehicle transmission according to one of claims 6 to 12, characterized in that the torque introduction shaft (24) has a hollow channel (26), wherein the hollow channel (26) in particular with an oil line (76) is connectable.

14. Motor vehicle transmission according to one of claims 6 to 13, characterized in that the transmission clutch (32) and the intermediate wall (46) is arranged at an end facing the engine or at a direction away from the engine end of the Getriebeeinganswelle (62).

15. Motor vehicle transmission according to one of claims 6 to 14, characterized in that a first housing part (68) and a second housing part (70) are provided and the intermediate wall (46) between the first housing part (68) and the second housing part (70) is.