DE102018107978A1 - Gear bell with accessory connection - Google Patents

Abstract

The invention relates to a transmission bell (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), wherein an accessory housing (5), in which the auxiliary unit (4) at least partially contained and / or covered by this, the mounting opening (3) closes so tightly that the gear bell (1) is completed. Furthermore, the invention also relates to a kit of a gear bell (1) according to the invention with a gear (8) having gear (2) and an auxiliary unit (4) having a drive gear (9) which in direct operative engagement with one of the gears (8 ) of the transmission (2) is.

Description

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

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 does not rely on PHEV (plug-in). 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 this purpose, for example, discloses the WO 2014/158230 A1 a drive system for auxiliary units, such as ancillaries. The drive system disclosed therein includes a clutch assembly having a drive shaft; and at least one auxiliary 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 drive shaft is independent of the rotation of a starter unit of the vehicle. 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 drive the at least one accessory 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 traction means expands in operation over time, so that it may be necessary to retighten the endless traction 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 accessory to the transmission, without affecting the tightness of the transmission bell.

The object of the invention is achieved in a generic bell housing according to the invention in that an accessory housing in which the accessory at least partially contained and / or covered by it, the mounting hole closes so tightly that the bell housing is completed. Further, 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 gearbox 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 accessory to the gearbox by means of the gear engagement allows to dispense with a continuous traction means, whereby the required space is reduced.

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 housing is sealed to the outside in the region of the mounting hole, which is used for insertion of the auxiliary unit.

From a mounting perspective, it has proven to be advantageous if the accessory housing serves as a cover for the mounting hole. 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 accessory.

A possible embodiment provides that the accessory housing has tabs with mounting holes for passing through fastening means, such as screws, rivets or bolts. 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 toothed gear meshing with the 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 auxiliary unit such that the axis of the accessory takes place axially parallel to the axis of the meshing with the drive gear of the gearbox.

Another advantageous embodiment provides that the axial distance of the gears by a lateral mounting surface of the accessory housing, which is used for positioning and attachment of the accessory housing to the bell housing, and the assembly of the accessory housing to the bell housing perpendicular or at a defined angle to the Rotation axes of the gears 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 auxiliary unit is implemented directly in the transmission and not via an endless traction drive of the combustor. 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 accessory is to be understood as an insert into the transmission bell, 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 provides to insert the accessory from the outside in the bell housing. Compared to the previous version, the auxiliary unit, also like a cartridge, is inserted from the outside into the bell. It is advantageous that the necessary connections remain outside of 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, in this case an additional cover over the gear is required because otherwise there is an open position between the transmission interior and the engine compartment.

• 1 eine perspektivische Ansicht einer Getriebeglocke mit einem in einer ersten Ausführungsform angeordneten Nebenaggregat;
• 2 eine perspektivische Ansicht der Getriebeglocke mit Darstellung ihres Innenraums in der ersten Ausführungsform;
• 3 eine perspektivische Ansicht der Getriebeglocke mit einem in einer zweiten Ausführungsform angeordneten Nebenaggregat;
• 4 eine perspektivische Ansicht der Getriebeglocke mit Darstellung ihres Innenraums in der zweiten Ausführungsform;
• 5 eine perspektivische Ansicht der Getriebeglocke mit einem in einer dritten Ausführungsform angeordneten Nebenaggregat;
• 6 eine perspektivischen Ansicht der Getriebeglocke mit Darstellung ihres Innenraums in der dritten Ausführungsform; und
• 7 eine Querschnittansicht der Getriebeglocke aus 5 und 6.

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

• 1 a perspective view of a bell housing with a arranged in a first embodiment accessory;
• 2 a perspective view of the bell housing showing its interior in the first embodiment;
• 3 a perspective view of the transmission bell with a arranged in a second embodiment accessory;
• 4 a perspective view of the bell housing showing its interior in the second embodiment;
• 5 a perspective view of the transmission bell with a arranged in a third embodiment accessory;
• 6 a perspective view of the bell housing showing its interior in the third embodiment; and
• 7 a cross-sectional view of the bell housing 5 and 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 embodiments. So they are interchangeable.

The 1 and 2 show a bell housing 1 such as in a car or a truck for receiving a transmission 2 (please refer 2 ) is used. The gear bell 1 has a mounting hole 3 in which an accessory 4 (please refer 2 ), which in an accessory housing 5 is included is used.

In the embodiment shown here, the accessory becomes 4 from the inside into the mounting hole 3 the gear bell 1 pushed in and also fastened from the inside. For this purpose, the auxiliary unit housing 5 flange-like tabs 6 on, which each have a through hole 7 own, by means of which the accessory housing 5 For example, by using screws, rivets, bolts or other fasteners on the gear block 1 can be attached.

The gear 2 is simplified here as a group of several teeth meshing with each other 8th shown. The accessory 4 has a gear 9 on which one with the gears 8th of the transmission 2 in direct operative engagement (ie, meshing) stands. About this operative engagement is a torque of the transmission 2 on the accessory 4 transferred to power this.

The accessory 4 For example, a hydraulic machine such as an air compressor or a pump such as an oil pump, or an electric machine such as a (small) alternator by means of the transmission 2 transmitted torque can be driven.

In the in the 1 and 2 shown first exemplary embodiment, the accessory is 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 , pushed in. This defines the position of the gear 9 to the gear 8th of the transmission 2 , At the same time serves a contact or interface 14 between the accessory housing 5 and the mounting hole 3 as a sealing surface over which the bell housing 1 is sealed to the outside. This is the outer contour of the accessory housing 5 so on the contour of the mounting hole 3 to agree that they are possible without play or sealing mountable. The accessory housing 5 acts in this first exemplary embodiment, more or less as a kind of plug for the mounting hole 3 , In addition, a separate seal can also be provided here.

To the required interfaces, such as cables and cables, which outside the bell housing 1 must be at least one connection 10 , here are two connections 10 , on the accessory housing 5 provided. Using the connectors 10 can provide the required interfaces from the gearbox bell 1 look out.

The 3 and 4 show a further embodiment of the arrangement of the transmission bell 1 and the accessory housing 5 , The components in the embodiment shown here correspond predominantly to the components of the in the 1 and 2 described embodiment, which is why below only addresses the differences.

In the 3 and 4 illustrated embodiment differs from the embodiment shown above substantially in that the accessory 4 together with the accessory housing 5 and the gear 9 like a cartouche from the outside into the gear bell 1 be inserted and also from the outside of the bell housing 1 be attached. For this purpose, the auxiliary unit housing 5 also flange-like tabs 6 with a through hole 7 on, about which the accessory housing 5 , as already mentioned, from the outside on the bell housing 1 is attached. This means that the accessory housing 5 in this embodiment as a kind of plug with a lid 11 for the mounting opening 3 in the gear bell 1 serves. In contrast to the first embodiment shown, the second embodiment shown here has the advantage that the connections 10 on the outside of the gear bell 1 remain. Furthermore, this embodiment has 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 ( 1 and 2 ) and the second ( 3 and 4 ) embodiment shown circumferentially of the accessory housing 5 is enclosed and the mounting hole 3 in one of the walls of the gear bell 1 located substantially parallel to the gears 8th of the transmission 2 is arranged, is the accessory 4 in the third exemplary embodiment shown in FIGS 5 to 7 is shown, frontally, at least partially from the accessory housing 5 covered and the mounting hole 3 is located in one of the walls of the bell housing 1 that are substantially perpendicular to the gears 8th of the transmission 2 is aligned.

This third embodiment sets the connection of the accessory 4 to the gearbox 2 by a lateral flanging around. This is the accessory 4 together with the gear 9 from the outside into the mounting hole 5 in the gear bell 1 dipped, where they, similar to a circular saw, only a part of the bell housing 1 dive in and another part about the gear bell 1 protrudes outwards. Therefore, it is necessary in this embodiment, the accessory housing 5 as a kind of lid 12 to do that over tabs 6 with through holes 7 from the outside on the bell housing 1 is fixed or attached.

As in this embodiment, the gear 9 from the gear bell 1 sticking out, here it is necessary that also 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 the fact that the accessory housing 5 is designed such that it is both the accessory 4 as well as the gear 9 or it will be one of the accessory housing 5 additional, separate cover 13 provided to cover the gear 9 serves and also from the outside by means of tabs 6 on the gear bell 1 is attached.

Also in the embodiment shown here, the accessory unit housing 5 two connections 10 on the outside of the gearbox bell 1 lie.

In the in 3 and 4 shown in the second exemplary embodiment and in the in 5 to 7 shown third exemplary embodiment, the contact or interface 14 between the gear bell 1 in the area of the mounting opening 3 and the accessory housing 5 (and possibly the additional cover 13 ) are sealed by means of a seal against fluid leakage or entry.

LIST OF REFERENCE NUMBERS

1

transmission bell

2

transmission

3

mounting hole

4

accessory

5

Accessory case

6

flap

7

Through Hole

8th

Gear (gear)

9

Gear (accessory)

10

connection

11

cover

12

cover

13

cover

14

Contact / interface

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2014/158230 A1 [0003]

Claims (10)

Gear bell (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 accessory (4), characterized in that an accessory housing (5) in which the auxiliary unit (4) at least partially contained and / or covered by this, the mounting opening (3) closes so tightly that the gear bell (1) is completed. Gear bell (1) according to Claim 1 , characterized in that a seal on a contact surface (14) between the gear bell (1) and the auxiliary unit (4) is provided. Gear bell (1) according to Claim 1 or 2 , characterized in that the accessory housing (5) serves as a cover (11; 12) for the mounting opening (3). Gear bell (1) according to Claim 3 , characterized in that the lid (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. Gear bell (1) according to one of Claims 1 to 4 , characterized in that the accessory housing (5) has tabs (6) with mounting holes (7) for passing through fastening means. Gear bell (1) according to one of Claims 1 to 5 , characterized in that the accessory housing (5) from the inside or from the outside to the transmission bell (1) is attached. Gear bell (1) according to one of Claims 1 to 6 , characterized in that the accessory housing (5) on the inside or on the outside of the transmission bell (1) is arranged. Kit comprising a gear bell (1) according to one of the preceding claims with a gear (2) having gear wheels (8) and an auxiliary unit (4) which has a drive gear (9) which is in direct operative engagement with one of the gear wheels (8) Gearbox (2) stands. 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) meshing gear (8) of the transmission (2). Kit according to Claim 8 or 9 , characterized in that the drive gear (9) is frontally and / or circumferentially covered by the accessory housing (5).

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