DE102022108530A1 - Gearbox housing - Google Patents

Abstract

The invention relates to a transmission bell (3), in particular a transmission housing (2) of a motor vehicle, with a wall (4) which separates an interior (5) from an external area (6) of the transmission bell (3), wherein in the wall (4 ) at least one opening (7) is provided, wherein in the at least one opening (7) a check valve (8), in particular a ball check valve, is inserted, which releases the respective opening (7) in a first operating position and which in a second operating position the respective opening (7) closes.

Description

The invention relates to a transmission housing of a transmission for the drive train of a motor vehicle, in particular a transmission bell housing of a transmission housing.

Motor vehicles have a drive train, in which a transmission is typically provided. The transmission has a transmission housing, which protects elements of the transmission from the outside. The gearbox housing generally also has a gearbox bell as part of the gearbox housing, in which a torsional vibration damper is arranged in order to dampen torsional vibrations in the drive train.

The gearbox bell typically has a drain hole in order to be able to remove water that has penetrated into the gearbox bell, condensate that has formed in the gearbox bell, dust or other dirt and the like from the gearbox bellhousing.

In modern motor vehicles, it is common for the watertightness requirements of torsional vibration dampers or dual-mass flywheels to become ever higher because the risk of water penetrating the gearbox housing when driving through deep water becomes ever greater. Therefore, it should be avoided that water can penetrate into the gearbox bell in large quantities in order to be able to keep the requirements for the torsional vibration damper at the current level so that the torsional vibration damper is not damaged or destroyed after a flooded gearbox bellhousing. However, contrary to the conceivable wish of completely sealing the gearbox bell, it must be ensured that, for example, condensates or dusts etc. that arise in the gearbox bell can still escape from the gearbox bell, which contradicts a complete sealing of the gearbox bell.

It is the object of the present invention to create a gear housing with a gear bell or a gear bell which, on the one hand, achieves sufficient watertightness and, on the other hand, still allows condensate, dust or dirt to escape.

The task of the transmission bell is solved with the features of claim 1.

An exemplary embodiment of the invention relates to a transmission bell, in particular a transmission housing of a motor vehicle, with a wall which separates an interior space from an external space of the transmission bell, at least one opening being provided in the wall, with a check valve, in particular a ball check valve, in the at least one opening , is arranged, which releases the respective opening in a first operating position and which closes the respective opening in a second operating position. This ensures that if there is an increase in water in the outside area, the check valve closes and a significant amount of water is prevented from entering, while if there is no increase in water in the outside area, the opening and the check valve are open and condensate, dust and/or dirt can escape.

In a further exemplary embodiment, it is advantageous if the check valve has a sleeve with a continuous channel in which a closing element is displaceably arranged, so that the closing element releases the channel in a first operating position and closes the channel in a second operating position. The check valve, in particular as a ball check valve, can also be inserted in one piece into the wall or designed in one piece with it. The sleeve can be inserted into the opening or formed in one piece with the wall.

It is advantageous if the channel has a tapering course so that its cross section decreases from the outside towards the inside. This ensures that the channel itself can serve as a counter bearing for the closing element.

In a further exemplary embodiment, it is expedient if the closing element, in particular a ball, is dimensioned with its maximum cross section such that the maximum cross section of the closing element is smaller than a maximum cross section of the channel and that the maximum cross section of the closing element is larger than a minimum Cross section of the channel. This causes, when the closing element is displaced in the channel, that it either blocks the channel or unblocks it.

It is also expedient if the closing element is acted upon by the water in a sealing manner against the wall of the channel when water enters the channel. In this way, automatic closure can be achieved if there is a need for wear.

It is particularly advantageous if the closing element is made of plastic or metal and in particular has a lower density than water. This means that the closing element can be designed easily and can also make a good seal against the wall of the channel.

It is also advantageous if the closing element is designed as a hollow element, in particular as a hollow ball. This creates a light yet stable locking element.

It is also advantageous if the sleeve has at least one retaining element at its end facing the outside, which prevents the closing element from escaping from the channel. This means that the closing element can be displaceably arranged in the sleeve in the channel without the risk of losing the closing element.

It is also advantageous if the retaining element forms at least one finger, shoulder or collar, which reduces the clear cross section of the channel in order to retain the closing element.

The task of the gearbox housing is solved with the features of claim 10.

An exemplary embodiment of the invention relates to a transmission housing of a transmission with a transmission bell housing according to the invention.

The present invention is explained in more detail below using preferred exemplary embodiments in conjunction with the associated figures.

• 1 eine schematische Darstellung eines Ausführungsbeispiels eines Getriebegehäuses mit einer teilweise dargestellten Getriebeglocke,
• 2 eine schematische Darstellung einer Wandung einer Getriebeglocke mit einer Öffnung mit einem schematisch angedeuteten Rückschlagventil,
• 3 eine schematische Darstellung eines Ausführungsbeispiels des Rückschlagventils,
• 4 eine schematische Schnittdarstellung eines weiteren Ausführungsbeispiels des Rückschlagventils, und
• 5 eine schematische Schnittdarstellung eines weiteren Ausführungsbeispiels des Rückschlagventils.

Show:

• 1 a schematic representation of an exemplary embodiment of a transmission housing with a partially shown transmission bell,
• 2 a schematic representation of a wall of a gear bell with an opening with a schematically indicated check valve,
• 3 a schematic representation of an exemplary embodiment of the check valve,
• 4 a schematic sectional view of a further embodiment of the check valve, and
• 5 a schematic sectional view of a further embodiment of the check valve.

The 1 shows a transmission 1 with a transmission housing 2 and with a transmission bell 3, in particular of a motor vehicle. The gearbox bell 3 can only be partially recognized because it is designed in several parts and part of it is shown in the illustration 1 has been removed.

Can be seen in 1 that the wall 4 of the gear bell 3 protrudes from the gear housing 2, so that a further part of the gear bell 3 can then be arranged thereon.

The wall 4 of the gear bell 3 is in 2 also partially shown. The wall 4 separates an interior 5 of the gear bell 3 from an outside space 6 of the gear bell 3.

At least one opening 7 is provided in the wall 4. A check valve 8, in particular a ball check valve, is inserted or arranged in the at least one opening 7, which releases the respective opening 7 in a first operating position and which closes the respective opening 7 in a second operating position. This ensures that the interior 5 is separated from the exterior 6 or is fluidly connected to it.

The 3 shows such a check valve 8 before being inserted into the opening 7.

The 4 and the 5 show a section of a respective further exemplary embodiment of a check valve 8.

The check valve 8 has a sleeve 9 with a continuous channel 11, in which a closing element 10 is displaceably arranged, so that the closing element 10 releases the channel 11 in a first operating position and closes the channel 11 in a second operating position.

In the 2 and 3 the closing element 10 is unloaded, so that it is in a first operating position in which the channel 11 is released. In the 4 and 5 the closing element 10 is shown loaded so that it is in a second operating position in which the channel 11 is closed.

In the sectional views of the 4 and 5 It can be seen that the channel 11 has a tapering course, so that its cross section Q decreases from the outer space 6 to the inner space 5.

The closing element 10, in particular a ball, is dimensioned with its maximum cross section q such that the maximum cross section q of the closing element 10 is smaller than a maximum cross section Q of the channel 11 and that the maximum cross section q of the closing element 10 is larger than a minimum cross section Q of the channel 11. This ensures that the closing element 10 can open or close the channel 11 relative to its axial position in the channel 11.

It is preferred if the closing element 10 moves against the wall 12 of the channel 11 when water enters the channel 11 is acted upon in a sealing manner. The closing element 10 is preferably made of plastic or metal and in particular has a lower density than water.

The closing element 10 is particularly advantageously designed as a hollow element, in particular as a hollow ball. As a result, the closing element 10 can be designed to be stable and yet lightweight.

Particularly advantageously, the sleeve 9 has at least one retaining element 14 or several retaining elements 14 at its end 13 facing the outside space 6, which prevents the closing element 10 from escaping from the channel 11. In 2 and 3 Embossed areas 15 are provided as retaining elements 14, in 4 a ring element 16 is attached to the end of the sleeve 9 as a retaining element 14 and in 5 Caulked areas 17 are provided.

The retaining element 14 is, for example, designed as at least one finger, shoulder or collar, which reduces the clear cross section of the channel 11 in order to retain the closing element 10, as shown in FIGS 3 until 5 is easy to see.

Reference symbol list

1

transmission

2

Gearbox housing

3

Gear bell

4

wall

5

inner space

6

Outdoor space

7

opening

8th

check valve

9

sleeve

10

Closing element

11

channel

12

wall

13

End

14

Retaining element

15

embossed areas

16

Ring element

17

caulked areas

Claims (10)

Transmission bell (3), in particular of a transmission housing (2) of a motor vehicle, with a wall (4) which separates an interior (5) from an outer space (6) of the transmission bell (3), at least one opening in the wall (4). (7) is provided, wherein in the at least one opening (7) a check valve (8), in particular a ball check valve, is arranged, which releases the respective opening (7) in a first operating position and which opens the respective opening (7) in a second operating position 7) closes. Gearbox bell (3). Claim 1 , characterized in that the check valve (8) has a sleeve (9) with a continuous channel (11), in which a closing element (10) is displaceably arranged, so that the closing element (10) closes the channel (11) in a first operating position ) releases and closes the channel (11) in a second operating position. Gearbox bell (3). Claim 2 , characterized in that the channel (11) has a tapering course, so that its cross section decreases from the outer space (6) to the inner space (5). Gearbox bell (3). Claim 2 or 3 , characterized in that the closing element (10), in particular a ball, is dimensioned with its maximum cross section such that the maximum cross section of the closing element (10) is smaller than a maximum cross section of the channel (11) and that the maximum cross section of the closing element (10) is larger than a minimum cross section of the channel (11). Gearbox bell (3). Claim 4 , characterized in that when water enters the channel (11), the closing element (10) is acted upon by the water in a sealing manner against the wall (12) of the channel (11). Gear bell (3) according to one of the preceding claims, characterized in that the closing element (10) is made of plastic or metal and in particular has a lower density than water. Gearbox bell (3). Claim 6 , characterized in that the closing element (10) is designed as a hollow element, in particular as a hollow ball. Gear bell (3) according to one of the preceding claims, characterized in that the sleeve (9) faces the outside space (6). th end (13) has a retaining element (14), which prevents the closing element (10) from escaping from the channel (11). Gearbox bell (3). Claim 8 , characterized in that the retaining element (14) forms at least one finger, shoulder or collar, which reduces the clear cross section of the channel (11) in order to retain the closing element (10). Gear housing (2) of a gear (1) with a gear bell (3) according to one of the preceding claims.

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