DE102011079998A1 - Bearing assembly, particularly for oil pump drive gear for supporting shaft on pin inserted at or in transmission component, has radially inwardly directed annular shoulder, which is formed in bearing inner ring - Google Patents

Abstract

The bearing assembly has a bearing inner ring (4) with a surface formed by an outer peripheral surface of running surface, where a bearing unit (3) is formed in conjunction with a bearing outer ring (5) and the bearing inner ring. A radially inwardly directed annular shoulder (4a) is formed in the bearing inner ring, where a sealing element (6) is received in an inner corner between the inner peripheral surface of the bearing inner ring and the inner peripheral surface facing the inner side of the annular shoulder.

Description

Field of the invention

The invention relates to a bearing assembly for supporting a on a shaft journal, or inserted into this transmission component, in particular a gear which is coupled via a toothing with that shaft journal.

Out DE 10 2006 035 133 A1 a pump drive of an automatic transmission is known. In this pump drive, a sprocket is provided, which is coupled via a toothing with a Wandlernabe. The converter hub is radially mounted via a needle bearing in a transmission housing. The sprocket has a hub portion which is inserted into the transducer hub. In the hub portion, a circumferential groove is formed. In this circumferential groove, an O-ring is received by which the joint gap between the hub portion of the sprocket and the inner wall of the converter hub is sealed. Such automatic transmissions are manufactured in large quantities at high cost pressure.

Object of the invention

The invention has for its object to provide a bearing assembly by which a viable radial support of a rotating transmission member is made possible and also in conjunction with this storage, the manufacturing costs and assembly times of the entire system can be reduced.

Inventive solution

• – einem Lagerinnenring mit einer durch dessen Außenumfangsfläche gebildeten Lauffläche,
• – einem Lageraußenring mit einer durch dessen Innenumfangsfläche gebildeten Lauffläche, und
• – einer im Zusammenspiel mit dem Lageraußenring und dem Lagerinnenring gebildeten Lagereinrichtung,
• – wobei an dem Lagerinnenring eine erste radial einwärts gerichtete Ringschulter ausgebildet ist und in einem Inneneckbereich zwischen der Innenumfangsfläche des Lagerinnenringes und einer dieser Innenumfangsfläche zugewandten Innenstirnfläche der vorgenannten Ringschulter, ein Dichtungselement aufgenommen ist.

This object is achieved by a bearing assembly with:

• A bearing inner ring having a tread formed by its outer circumferential surface,
• - A bearing outer ring with a tread formed by the inner peripheral surface, and
• A bearing device formed in cooperation with the bearing outer ring and the bearing inner ring,
• - Wherein on the bearing inner ring, a first radially inwardly directed annular shoulder is formed and in a Inneneckbereich between the inner peripheral surface of the bearing inner ring and one of said inner peripheral surface facing inner end face of the aforementioned annular shoulder, a sealing element is received.

This makes it possible in an advantageous manner to provide a bearing assembly in which a sealing ring groove is created by the bearing inner ring and this supporting component. In this sealing ring groove, a sealing ring can be used. This sealing ring can take a position by which an adjacent joint gap can be effectively sealed.

The bearing arrangement according to the invention can be designed so that a joint gap between a bearing the bearing inner ring hub portion and the hub portion bearing shaft journal is sealed by the sealing element (sealing of the joining gap of Aufstecknabe). Alternatively, the bearing assembly may also be designed so that a joint gap between a shaft journal bearing the bearing ring and a hub portion inserted in the shaft journal is sealed by the sealing element (sealing of the joining gap of an insertion hub).

The bearing device is preferably as a rolling bearing with relatively langgstreckten, cylindrical rolling elements, d. H. designed as a needle bearing. Preferably, this needle roller bearing comprises a needle roller cage which is accommodated in an annular space defined between the bearing inner ring and the bearing outer ring, as well as needles which are received in the needle roller cage and support the bearing inner ring and the bearing outer ring radially against each other. The two bearing rings are preferably designed as drawing technical, seamless components. The running surfaces of the rolling elements can be given their final geometry directly within the scope of the technical drawing process, or possibly even slightly recalibrated.

As an alternative to the design of the bearing device as a rolling bearing, it is also possible to perform this as a plain bearing. Here, either a bearing ring made of a sliding bearing material can be used between the bearing rings, or the mutually facing running surfaces of the bearing rings are designed as sliding bearing surfaces. For this purpose, these treads are preferably formed by a special bearing metal layer.

The inventive concept is particularly suitable for use in automatic transmissions, for the realization of an oil pump drive train. About the bearing device according to the invention in this case a joint gap can be sealed which is formed as such in the coupling of an oil pump drive gear with a transducer hub. The toothed wheel formed as a chain or tooth engagement gear in this case comprises an integrally formed hub portion which is either on the transducer hub or inserted into this. The bearing assembly according to the invention sits in the case of the variant with plugged hub also on this hub. In the case of the variant with inserted hub, the bearing assembly according to the invention sits on the transducer hub.

Both the bearing inner ring and the bearing outer ring are preferably designed so that the bearing members received between these bearing rings (in the case of the roller bearing variant of the needle roller bearing basket and the needles) are axially secured. For this purpose, ring shoulders are preferably formed on the bearing outer ring which extend radially inwardly and thereby form corresponding end faces on which the bearing members may possibly start and thus experience an axial positioning. For this purpose, the bearing outer ring preferably comprises both a first radially inwardly directed annular shoulder and a second radially inwardly directed annular shoulder. In addition to the axial securing of the bearing elements of the bearing device, a stop face can also be created by means of these annular shoulders, by means of which at least in one axial direction the axial displacement path of the two bearing rings is limited relative to one another. Thus, in particular on the bearing inner ring, in addition to the first annular shoulder provided for forming the sealing ring groove, a second annular shoulder can be formed, which, however, then does not rise inward but radially outward beyond the inner needle bearing surface. This second annular shoulder of the bearing inner ring can then start in the installed position on an outer end face of the first annular shoulder of the bearing outer ring. As a result, a stop function is achieved at least in an axial direction.

The seated in the sealing ring sealing ring can be designed as a classic O-ring and have corresponding oversize to possibly obtain a slight bias. The sealing ring can also receive a tailored to the application special profiling and z. B. form a plurality of sealing lips. Furthermore, it is possible to secure the sealing ring on the bearing inner ring in advance by this is partially vulcanized, for example, to the bearing inner ring in Inneneckbereich described. It is also possible to form a special profiling on the bearing inner ring by means of which the sealing ring can be connected sufficiently captive to the bearing inner ring in advance, so that an assembly is formed here including the bearing device which already comprises the sealing ring held captive.

In particular, in the variant in which the bearing device carrying the component, for. B. the gear hub, is plugged onto a shaft journal, it is possible to combine the bearing device, that aufzusteckende component and the sealing ring to a preassembled unit. For this purpose, for example, the bearing inner ring may be dimensioned so that it is received with a sufficient interference fit on the hub portion. About the basket of the needle bearing a captive can be formed by which the needle bearing and the bearing outer ring are held on the bearing inner ring.

Brief description of the figures

Further details and features of the invention will become apparent from the following description taken in conjunction with the drawings. It shows:

1 a first axial sectional view illustrating the structure of a first embodiment of a bearing assembly according to the invention;

2 a second axial sectional view illustrating the structure of a second embodiment of a bearing assembly according to the invention in use in an automatic transmission in which an oil pump drive gear is mounted on a converter hub,

3 a third axial sectional view illustrating the structure of a third embodiment of a bearing assembly according to the invention in which the hub portion of an oil pump drive gear is inserted into a Wandlernabe.

1 shows a bearing assembly according to the invention by which a multi-mated rotary part structure 1 in a housing 2 is stored. The bearing assembly comprises a bearing inner ring 4 with a tread formed by its outer peripheral surface, a bearing outer ring 5 with a tread formed by its inner peripheral surface, as well as in cooperation with the bearing outer ring 5 and the bearing inner ring 4 formed storage facility 3 ,

The bearing arrangement shown here is characterized in that on the bearing inner ring 4 a first radially inwardly directed annular shoulder 4a is formed and in a between the inner peripheral surface of the bearing inner ring 4 and an inner end face of the annular shoulder facing this inner circumferential wall 4a formed inside corner region a sealing element 6 is included. This sealing element 6 allows the sealing of a joint gap 7 here between one the bearing inner ring 4 carrying hub section 8th and one the hub portion 8th carrying shaft journals 9 results.

The sealing element 6 Here is simply executed as an O-ring and sits under slight axial tension in a circumferential groove ultimately through the bearing inner ring 4 and the end face of the hub portion 8th is formed.

In the embodiment shown here, the bearing device 3 designed as a roller bearing, in particular needle roller bearings. The storage facility 3 here includes a needle roller basket 10 which is received in a defined between the bearing inner ring and the bearing outer ring annulus, and needles 11 in the needle roller basket 10 are received and support the bearing inner ring and the bearing outer ring radially against each other,

The hub section 8th forms an integral part of a forming made of a sheet metal gear 12 , This gear 12 is in the area of the hub section 8th with an internal toothing 13a Mistake. Over niese internal gearing 13a is the gear 12 with the shaft journal 9 rotatably engaged.

The embodiment shown here illustrates in detail the installation situation of a bearing arrangement according to the invention in a transmission device, in particular in an automatic transmission.

At the bearing inner ring 4 is a perimeter profiling 4c educated. This circumferential profiling interacts with the needle cage 10 created a captive. This is on the needle cage 10 an inwardly hervororkende snap spring shoulder formed which during assembly of the needle roller bearing on the circumferential profile 4c is pushed and then snapped behind this or snapped.

In 2 are the use of the bearing assembly according to the invention in an automatic transmission further illustrated. The here the bearing assembly according to the invention receiving periphery corresponds to z. T. the periphery according to the prior art acc. the aforementioned DE 10 2006 035 133 A1 from which the structure of an automatic transmission itself still further emerges.

So shows 2 a bearing assembly according to the invention by which a plugged executed rotary part structure 1 in a housing 2 is stored. The bearing assembly also includes a bearing inner ring here 4 with a tread formed by its outer peripheral surface, a bearing outer ring 5 with a tread formed by its inner peripheral surface, as well as in cooperation with the bearing outer ring 5 and the bearing inner ring 4 formed storage facility 3 ,

At the bearing inner ring 4 one is the first radially inwardly directed annular shoulder 4a formed and in a between the inner peripheral surface of the bearing inner ring 4 and an inner end face of the annular shoulder facing this inner circumferential wall 4a formed inside corner region is designed as an O-ring sealing element 6 added. This sealing element 6 allows the sealing of a joint gap 7 here between the bearing inner ring 4 carrying hub section 8th and one the hub portion 8th carrying shaft journals 9 results. The shaft journal 9 forms part of a transducer hub 13 , The bearing outer ring 5 forms a first radially inwardly directed annular shoulder 5a , as well as a second radially inwardly directed annular shoulder 5b , Through these two ring shoulders 5a . 5b The rolling bearing device is axially in the bearing outer ring 5 secured.

At the bearing inner ring 4 is second ring shoulder 4b formed, which rises radially outward over the inner needle tread. This second ring shoulder 4b of the bearing inner ring 4 may be at an outer end face of the first annular shoulder 5a of the bearing outer ring 5 start and is thus secured axially.

The gear 12 is designed as a sprocket and is in the installed position shown here with a link chain 14 engaged. The gear 12 is manufactured as a drawing and flow / Pressumformteil. In the hub section 8th of the gear 12 is an internal toothing formed with a complementarily shaped external toothing of Wandlernabe 13 engaged.

The bearing inner ring 4 is also designed here as a drawn component and sits with a tight interference fit on the outer peripheral surface of the hub portion 8th , The gear 12 and the bearing formed with the inclusion of the two bearing rings form a preassembled module when plugging on the Wandlernabe 13 is integrated into the automatic transmission.

The sealing of the surrounding area of the bearing arrangement with respect to the transducer area is effected by a shaft sealing ring 15 , It is possible, even this shaft seal 15 still in one through the bearing rings 4 and 5 integrated assembly, so that, for example, the shaft seal 15 in an extension of the bearing outer ring 5 seat and on the bearing inner ring 4 starts.

In the embodiment shown here, the sealing of the joint gap takes place between the transducer hub 13 and the hub portion 8th through another O-ring 16 , Through this O-ring, a certain redundancy and increase the sealing effect is achieved. Possibly. can on this sealing ring 16 be waived.

In 3 a third variant of a bearing arrangement according to the invention is shown. In this variant, the hub section 8th of the gear 12 in the converter hub 13 plugged in and over a gearing 13a with this converter hub 13 rotatably coupled.

Also in this embodiment, a bearing assembly is provided by which from Wandlernabe 13 and hub section 8th formed, ie plugged executed rotary part structure 1 in a housing 2 is stored. The bearing assembly also includes a bearing inner ring here 4 with a tread formed by its outer peripheral surface, a bearing outer ring 5 with a tread formed by its inner peripheral surface, as well as in cooperation with the bearing outer ring 5 and the bearing inner ring 4 formed storage facility 3 ,

At the bearing inner ring 4 one is the first radially inwardly directed annular shoulder 4a formed and in a between the inner peripheral surface of the bearing inner ring 4 and one of said inner circumferential wall facing end face of the Wandlernabe 13 formed inside corner region is designed as an O-ring sealing element 6 added. This sealing element 6 allows the sealing of a joint gap 7 who is here between the Wandlernabe 13 and the inserted hub portion 8th results.

In this embodiment, the bearing outer ring forms 5 a step section 5c in which a shaft seal 15 is included. This shaft seal 15 runs on an outer peripheral surface of the converter hub 13 , It is also possible on the bearing inner ring 4 still form a ring extension of a contact surface for the shaft seal 15 forms.

In the embodiment shown here can on the two bearing rings 4 . 5 and shaft sealing 15 a preassembled module are formed in the process well manageable process axially into the housing 2 can be pressed. In this variant, the sealing ring is preferably 6 captive to the inner ring 4 tethered, in particular vulcanised.

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

• DE 102006035133 A1 [0002, 0024]

Claims (10)

Bearing arrangement with: - a bearing inner ring ( 4 ) with a tread formed by its outer circumferential surface, - a bearing outer ring ( 5 ) with a tread formed by its inner circumferential surface, and - one in conjunction with the bearing outer ring ( 5 ) and the bearing inner ring ( 4 ) ( 3 ), - being on the bearing inner ring ( 4 ) a first radially inwardly directed annular shoulder ( 4a ) is formed and in an inner corner region between the inner peripheral surface of the bearing inner ring ( 4 ) and one of these inner peripheral surface facing inner end face of the annular shoulder ( 4a ), a sealing element ( 6 ) is recorded. Bearing arrangement according to claim 1, characterized in that by the sealing element ( 6 ) a joint gap ( 7 ) between a bearing inner ring ( 4 ) carrying hub section ( 8th ) and a hub section ( 8th ) carrying shaft journals ( 9 ) is sealed. Bearing arrangement according to claim 1, characterized in that by the sealing element ( 6 ) a joint gap ( 7 ) between a bearing inner ring ( 4 ) carrying shaft journals ( 9 ) and one in the shaft journal ( 9 ) inserted hub portion ( 8th ) is sealed. Bearing arrangement according to at least one of claims 1 to 3, characterized in that the bearing device ( 3 ) is designed as a rolling bearing. Bearing arrangement according to claim 4, characterized in that the bearing device ( 3 ) a needle bearing cage ( 10 ) in a between the bearing inner ring ( 4 ) and the bearing outer ring ( 5 ) defined annular space, and needles ( 11 ) comprises in the needle roller cage ( 10 ) and the bearing inner ring ( 4 ) and the bearing outer ring ( 5 ) radially against each other, Bearing arrangement according to at least one of claims 1 to 4, characterized in that the bearing device ( 3 ) is designed as a sliding bearing. Bearing arrangement according to at least one of claims 1 to 6, characterized in that the hub portion ( 8th ) integral part of a gear ( 12 ). Bearing arrangement according to at least one of claims 1 to 7, characterized in that the shaft journal ( 9 ) Part of a transducer hub ( 13 ). Bearing arrangement according to at least one of claims 1 to 8, characterized in that the bearing outer ring ( 5 ) a first radially inwardly directed annular shoulder ( 5a ) and a second radially inwardly directed annular shoulder ( 5b ). Bearing arrangement according to claim 9, characterized in that the second annular shoulder ( 4b ) of the bearing inner ring ( 4 ) is formed so that it rises radially outward over the inner needle tread, and that this second annular shoulder ( 4b ) of the bearing inner ring ( 4 ) on an outer end face of the first annular shoulder ( 5a ) of the bearing outer ring ( 5 ) starts.

Images