WO2019192638A1

WO2019192638A1 - Transmission bell housing having auxiliary unit attachment

Info

Publication number: WO2019192638A1
Application number: PCT/DE2019/100041
Authority: WO
Inventors: Patrick Wisbar; Pierre-Yves Berthelemy; Wolfgang Haas
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2018-04-05
Filing date: 2019-01-17
Publication date: 2019-10-10
Also published as: DE102018107978A1

Abstract

The invention relates to a transmission bell housing (1) of a motor vehicle for receiving a transmission (2) via which drive torque is directed, and for receiving lubricant, wherein the transmission bell housing (1) has an assembly opening (3) for introducing an auxiliary unit (4), wherein an auxiliary unit housing (5), which at least partially contains and/or covers the auxiliary unit (4), sealingly closes the assembly opening (3) such that the transmission bell housing (1) is completed. The invention also relates to a kit formed by a transmission bell housing (1) according to the invention having a transmission (2) with gear wheels (8) and having an auxiliary unit (4) with a drive gear wheel (9), which is directly effectively engaged with one of the gear wheels (8) of the transmission (2).

Description

Getriebeqlocke with Nebenaqqreqatanbindunq

The present invention relates to a transmission bell of a motor vehicle with an internal combustion engine and / or an E-axis, such as a car, a truck or other commercial vehicle, for receiving a transmission, is passed over the drive torque, and for receiving lubricant, wherein the transmission bell has a mounting opening for inserting an auxiliary unit, such as a hydraulic machine, such as an air-conditioning compressor or a pump, for example an oil pump, or on the other hand an electric machine, such as a (small) generator. Furthermore, the invention also relates to a kit comprising a gearbox according to the invention with a gear having gears and an auxiliary unit.

Auxiliary units on or in the gearbox are a possible new field for components, such as gears with bearings, coupling with actuator or compressor, or for systems, such as a climate module made of these three components, the application or the market is not on PHEV (plug-in hybrid electric vehicles) or DHT (dedicated hybrid transmission) is limited.

From the state of the art ancillary connections by means of a continuous traction drive, such as for example a belt or a chain, have hitherto been known. For example, WO 2014/158230 A1 discloses a drive system for additional units, such as ancillary units. The drive system disclosed therein includes a clutch assembly having a drive shaft; and at least one additional unit connected to the drive shaft. In the first position of the clutch assembly, the clutch assembly is arranged to transmit a first torque from an output shaft of a transmission to the drive shaft to drive the at least one accessory unit, and the rotation of the input shaft is controlled by the rotation of a starter unit of the clutch assembly Vehicle independent. In the second position of the clutch assembly, the clutch assembly is arranged to transmit a second torque from the starter unit to the drive shaft to provide at least one additional torque. To drive unit, and the rotation of the drive shaft is independent of the rotation of the output shaft of the transmission.

However, such a connection via a endless traction drive has the disadvantage that a lot of space is needed to tension the endless traction means. In addition, the endless draw means expands in operation over time, so that it may be necessary to retighten the endless draw means, which is associated with increased maintenance.

The object of the invention is to avoid or at least mitigate the disadvantages of the prior art, and in particular to provide a direct connection of the auxiliary unit to the transmission, without impairing the tightness of the transmission bell.

The object of the invention is achieved according to the invention in a generic bell housing in that an accessory housing in which the auxiliary unit at least partially contained and / or covered by him, the mounting opening closes so tightly that the bell housing is completed. Furthermore, the invention is also achieved in that the accessory has a drive gear, which is in direct operative engagement, that is, in gear engagement with one of the gears of the transmission.

In this case, interfaces and sealing surfaces between the gear unit and the auxiliary unit are defined in terms of assembly and production so that there is no leakage of the bell housing. In addition, the direct connection of the auxiliary unit to the gearbox by means of the gear engagement makes it possible to dispense with a terminal release means, which reduces the required installation space.

Advantageous embodiments are claimed in the subclaims and are explained below.

To ensure the tightness of the bell housing, it is advantageous if a seal at a contact surface or an interface between the bell housing and the accessory is provided. Thus, the bell is also in the rich of the mounting hole, which serves for inserting the accessory, sealed to the outside.

From a mounting perspective, it has proven to be advantageous if the ancillary housing serves as a cover for the mounting opening. As a result, the mounting hole is automatically closed by the accessory housing.

Furthermore, it is advantageous if the cover has at least one connection opening for connecting and / or passing through a hydraulic line / cold-medium line or a power cable. This ensures the interfaces for driving the auxiliary unit.

A possible embodiment provides that the accessory housing tabs with mounting holes for performing fasteners, such as.

Screws, rivets or bolts, has. As a result, the accessory housing can be attached to the bell housing.

It is possible that the accessory housing is fixed from the inside or from the outside to the transmission bell.

Possible advantageous embodiments provide that the accessory housing is arranged on the inside or on the outside of the transmission bell. In particular, the arrangement of the accessory housing within the transmission bell is particularly space-saving.

It is advantageous if the outer contour of the accessory housing is adapted to the contour of the mounting hole clearance / sealing. Thereby, the implementation of the tightness at the contact or interface between the bell housing and the accessory housing can be simplified.

For the kit according to the invention, it is advantageous if the drive gear is frontally and / or circumferentially covered by the accessory unit housing. In addition, it is expedient if an axis of the auxiliary unit is axially parallel to an axis of the gear meshing with the drive gear of the transmission.

An advantageous embodiment provides that the center distance of the gears, ie, a gear of the transmission on the one hand and the gear (ie the drive gear) of the accessory on the other hand, through the insertion hole, ie, the mounting hole is formed for the accessory housing and the assembly of the ancillary unit takes place in such a way that the axis of the ancillary unit is axially parallel to the axis of the gearwheel of the transmission which is in engagement with the drive gearwheel.

Another advantageous embodiment provides that the axial spacing of the toothed wheels is determined by a lateral attachment surface of the auxiliary unit housing, which serves for positioning and fastening the accessory unit housing to the transmission bell, and the assembly of the accessory unit housing to the transmission bell is perpendicular or in one defined angle to the axes of rotation of the Zahnrä- takes place. The axes of rotation of the gears are arranged axially parallel to each other in this case.

In other words, the invention consists in that the connection of the secondary unit is implemented directly in the transmission and not via an endless traction mechanism drive of the burner unit. In order to solve this assembly and production, the auxiliary unit must be installed together with the bell housing. This can be implemented, for example, in that the auxiliary unit is to be understood as an insert in the bell housing, in which the entire auxiliary unit is inserted and mounted like a cartridge from the inside into its defined position in the bell housing. In this case, the position of the gear defines the wheel of the transmission via a connection point on the bell, which also works as a sealing surface. The required interfaces, such as cables and cables, must be designed so that they look out of the gearbox.

Another possibility is to insert the accessory into the gearbox from the outside. Compared to the previous variant, the auxiliary unit, also like a cartouche, pushed into the bell from the outside. In this case, it is advantageous that the necessary connections remain outside the transmission bell.

Yet another possibility provides that the connection of the accessory to the transmission is realized by a lateral flanging. Through a matching recess in the bell, the accessory and the gear is dipped laterally in the bell housing. Similar to a circular saw, the gearwheel dives through the bell housing. Therefore, an additional cover over the gear is required in this case, since otherwise there is an open space between the transmission interior and the engine compartment.

The invention will be explained in more detail below with the aid of figures, in which different embodiments are shown. Show it:

Figure 1 is a perspective view of a bell housing with a arranged in a first embodiment accessory.

FIG. 2 is a perspective view of the bell housing showing its interior in the first embodiment; FIG.

3 shows a perspective view of the transmission bell with a secondary unit arranged in a second embodiment;

4 is a perspective view of the bell housing showing its interior in the second embodiment.

5 shows a perspective view of the transmission bell with an auxiliary unit arranged in a third embodiment;

6 is a perspective view of the bell housing showing its interior in the third embodiment; and

7 is a cross-sectional view of the transmission bell of FIG. 5 and FIG. 6. The figures are merely schematic in nature and are only for the understanding of the invention. The same elements are provided with the same reference numerals.

Features of the individual embodiments can also be realized in other exemplary embodiments. So they are interchangeable.

The Fign. 1 and 2 show a transmission bell 1, as used, for example, in a passenger car or a truck for receiving a transmission 2 (see FIG. 2). The transmission bell 1 has a mounting opening 3 into which an auxiliary unit 4 (see FIG.

2), which is received in an accessory housing 5, is used.

In the embodiment shown here, the auxiliary unit 4 is inserted from the inside into the mounting opening 3 of the bell housing 1 and also secured from the inside. For this purpose, the accessory housing 5 on flange-like tabs 6, which each have a through hole 7, by means of which the accessory unit housing 5, for example. By means of screws, rivets, bolts or other fastening means to the gear block 1 can be attached.

The transmission 2 is shown here in simplified form as a group of several toothed wheels 8 that mesh with each other. The accessory 4 has a gear 9 which is in direct operative engagement (i.e., tooth engagement) with one of the gears 8 of the transmission 2. Through this operative engagement, a torque of the transmission 2 is transmitted to the auxiliary unit 4 in order to drive it.

The auxiliary unit 4 is, for example, a hydraulic machine, such as an air-conditioning compressor or a pump, such as an oil pump, or is an electric machine, such as a (small) alternator, which can be driven by means of the torque transmitted by the transmission 2 ,

In the in Figs. 1 and 2 of the first exemplary embodiment, the accessory 4, together with the accessory housing 5 and the gear 9, similar to a cartridge in its defined position, ie, in the mounting hole 3, is inserted. As a result, the position of the gear 9 defines the gear 8 of the 2. At the same time, a contact or boundary surface 14 between the auxiliary unit housing 5 and the mounting opening 3 serves as a sealing surface, via which the transmission bell 1 is sealed to the outside. For this purpose, the outer contour of the auxiliary unit housing 5 is to be matched to the contour of the mounting opening 3 so that it can be mounted as free of play or as a seal. In this first exemplary embodiment, the accessory housing 5 functions as a kind of plug for the mounting opening 3. In addition, a separate seal can also be provided here.

In order to provide the required interfaces, such as lines and cables, which must lie outside of the bell housing 1, at least one connection 10, here two connections 10, is to be provided on the auxiliary unit housing 5. With the aid of the connections 10, the required interfaces can be seen from the gear bell 1.

The Fign. 3 and 4 show a further embodiment for the arrangement of the transmission bell 1 and of the accessory housing 5. The components in the embodiment shown here correspond predominantly to the components of the embodiment shown in FIGS. 1 and 2 described embodiment, which is why in the following only the differences will be discussed.

The embodiment shown in FIG. 3 and FIG. 4 essentially differs from the embodiment shown above in that the auxiliary unit 4, together with the auxiliary unit housing 5 and the gearwheel 9, are inserted into the gear bell 1 from outside in the manner of a cartouche and also be attached from the outside to the transmission bell 1. For this purpose, the auxiliary equipment housing 5 likewise has flange-type lugs 6 with a through-hole 7, via which the auxiliary-unit housing 5, as already mentioned, is fastened to the transmission bell 1 from the outside. This means that the accessory housing 5 in this embodiment serves as a kind of plug with a lid 11 for the mounting hole 3 in the bell housing 1. In contrast to the first embodiment shown, the second embodiment shown here has the advantage that the connections 10 remain on the outside of the transmission bell 1. Furthermore, this version tion form the advantage that the accessory is easy to change in case of repair without having to disassemble the gearbox.

While the accessory 4 in the first (Fig. 1 and Fig. 2) and the second (Fig.

3 and 4) is enclosed circumferentially by the accessory housing 5 and the mounting opening 3 is located in one of the walls of the bell housing 1, which is arranged substantially parallel to the gearwheels 8 of the gearbox 2 the auxiliary unit 4 in the third exemplary embodiment, which in the Fign. 5 to 7, frontally, at least partially covered by the accessory housing 5 and the mounting hole 3 is located in one of the walls of the bell housing 1, which is aligned substantially perpendicular to the gears 8 of the transmission 2.

This third embodiment converts the attachment of the auxiliary unit 4 to the transmission 2 by means of lateral flanging. In this case, the auxiliary unit 4, together with the gearwheel 9, is submerged from the outside into the mounting opening 5 in the gearbox 1, whereby, similar to a circular saw, it is only partially immersed in the gearbox bell 1 and another part via the Gear bell 1 protrudes outwards. Therefore, in this embodiment it is necessary to design the accessory housing 5 as a kind of cover 12 which is fastened or fastened on the transmission bell 1 from the outside via lugs 6 with passage holes 7.

Since in this embodiment, the gear 9 protrudes from the bell housing 1, it is here necessary that the gear 9 is covered so that there is no open space between the transmission interior and an engine compartment (not shown). This can be realized either by configuring the accessory housing 5 to receive both the accessory 4 and the gear 9 (not shown), or to provide a separate cover 13, additional to the accessory housing 5, which serves to cover the gear 9 and is also fastened from the outside by means of tabs 6 on the bell housing 1.

Also in the embodiment shown here, the accessory unit housing 5 has two terminals 10, which lie outside the transmission bell 1. In the second exemplary embodiment shown in FIGS. 3 and 4 as well as in the embodiment shown in FIGS. 5-7, the contact or boundary surface 14 between the bell jar 1 in the region of the mounting opening 3 and the accessory housing 5 (and possibly the additional cover 13) by means of a seal against fluid leakage or entry be sealed.

Reference list of transmission bell

transmission

mounting hole

accessory

Accessory case

flap

Through Hole

Gear (gear)

Gear (accessory)

connection

cover

Contact / interface

Claims

claims

1. bell housing (1) of a motor vehicle for receiving a transmission (2), is passed over the drive torque, and for receiving lubricant, wherein the transmission bell (1) has a mounting opening (3) for inserting an auxiliary unit (4), characterized in that an accessory housing (5), in which the auxiliary unit (4) is at least partially contained and / or covered by the latter, closes the mounting opening (3) in such a sealed manner that the transmission bell (1) is completed.

2. Gear bell (1) according to claim 1, characterized in that a seal on a contact surface (14) between the gear bell (1) and the Nebenag- gregat (4) is provided.

3. bell housing (1) according to claim 1 or 2, characterized in that the accessory unit housing (5) as a cover (11; 12) for the mounting opening (3).

4. Gear bell (1) according to claim 3, characterized in that the cover (11; 12) has at least one connection opening (10) for connecting and / or carrying out a hydraulic line / cold-medium line or a power cable.

5. bell housing (1) according to one of claims 1 to 4, characterized in that the accessory unit housing (5) has tabs (6) with fastening holes (7) for performing fastening means.

6. bell housing (1) according to one of claims 1 to 5, characterized in that the accessory unit housing (5) from the inside or from the outside of the gear trimming bell (1) is attached.

7. gear bell (1) according to one of claims 1 to 6, characterized in that the accessory unit housing (5) on the inside or on the outside of the transmission bell (1) is arranged.

8. Kit of a gear bell (1) according to one of the preceding claims with a gear wheels (8) having gear (2) and an accessory (4) having a drive gear (9), which in direct operative engagement with one of the gears (8 ) of the transmission (2) is.

9. Kit according to claim 8, characterized in that an axis of the auxiliary unit (4) is axially parallel to an axis of the drive gear (9) in meshing gear (8) of the transmission (2).

10. Kit according to claim 8 or 9, characterized in that the drive gear (9) on the front side and / or peripherally covered by the accessory unit housing (5).