DE102013206349A1 - Seal and bearing - Google Patents

Abstract

A seal (210) according to an exemplary embodiment for a bearing (100), which comprises a first (120) and a second bearing ring (140), comprises an elastomer structure (220), the seal (210) being designed to at least partially to seal a volume (230) between the first (120) and the second bearing ring (140) with respect to a medium, the seal (210) being designed in such a way that the medium cannot pass through the seal (210), and the elastomer structure ( 220) is designed in such a way that it reacts to a change in pressure on one side of the elastomer structure (220) with a change in shape without essentially changing the sealing effect during the change in shape. In this way, a sealing behavior of a seal can possibly be improved under different conditions.

Description

In many areas of mechanical, plant and vehicle construction, the challenge of guiding rotary movements is that the bearing used for this purpose is filled with a lubricant or a lubricant which is not intended to be released into the environment. At the same time, however, the bearing or its lubricant should not be contaminated by environmental influences. For this purpose, a seal is often used in the context of the corresponding bearing, which should prevent both a discharge of the lubricant, as well as an entry of contaminants, such as water, dust or other dirt particles.

In many cases, this challenge is made more difficult by the fact that the bearing in question is exposed to very different temperatures, which can occur, for example, as a result of the environment, but also because of operational conditions. Thus, such a temperature change, a volume of a gas, so for example, the air that is trapped in the camp, expand or contract so much that over the seal takes place a pressure equalization with the environment. In the case of a rising temperature, lubricants can thus reach the environment through a gasket which at least opens for a short time, while in the case of strongly falling temperatures together with a gas (for example air) flowing into the interior of the bearing from the environment, corresponding contaminations are also entrained can be.

Conventionally, this behavior is counteracted by minimizing the internal volume of the bearing. Depending on the specific application, however, such a reduction of the free volume of the bearing may not solve the problem described above. Thus, for example, even if the relevant gas volume is minimized, the bearing can become so hot that gas escaping or entering and, if appropriate, lubricant discharge or contamination can occur. Also, it may possibly be difficult to constructively reduce the respective free volume of the bearing.

Not only with changing temperatures, but also with other changes of operating or environmental conditions, for example in the form of pressures, the aforementioned challenges can arise.

There is therefore a need to improve a sealing behavior of a seal under different conditions.

This need bear a seal according to claim 1 and a bearing according to claim 9 bill.

A seal according to an embodiment for a bearing comprising a first and a second bearing ring has an elastomeric structure, wherein the seal is adapted to at least partially seal a volume between the first and the second bearing ring with respect to a medium. The seal is in this case designed such that the medium can not pass the seal. The elastomeric structure is further configured to respond to a change in shape with a change in pressure on one side of the elastomeric structure without substantially causing or allowing a change in the sealing effect during the deformation.

A seal according to an embodiment is based on the finding that by providing the elastomer structure, which responds to a change in pressure on one side with a corresponding change in shape, without a change in the sealing effect, for example by reducing the pressure difference between the environment and the bearing interior, during the change in shape occurs, the sealing behavior of such a seal can be improved even under different environmental conditions. Thus, for example, at different temperatures and / or different pressures through the use of a seal according to an embodiment, their sealing behavior can be improved. The elastomeric structure is thus designed such that it makes a pressure change at least partially compensated by a corresponding change in shape. A change in the sealing effect, for example, a brief collapse of the same can thus be avoided if necessary by the ability of the elastomeric structure to effect a corresponding change in shape.

In a seal according to an embodiment, the seal may be configured to be connected to a first bearing ring of the bearing. The seal may also be designed such that it is non-contacting with respect to a second bearing ring which is different from the first bearing ring. This may make it possible to reduce, if not avoid completely, friction between the seal and the second bearing ring. Thus, this may optionally reduce wear of the seal, as well as alternatively or additionally also caused by an interaction of the seal with the second bearing ring friction, possibly even completely avoided. In this way, if appropriate, a temperature development between the seal and the second bearing ring due to a between them existing friction can be reduced or avoided.

In a gasket according to an embodiment, the elastomeric structure may include a membrane portion configured to allow the deformation of the elastomeric structure to be at least partially flexed by the membrane portion. As a result, if appropriate, a corresponding pressure equalization can already be created by structurally simple means, wherein the membrane region can, for example, cover or bridge a recess in a reinforcing structure of the seal.

A seal according to an embodiment may further include a reinforcing structure connected to the elastomeric structure and configured to be attachable to a first bearing race of the bearing. In this way, if appropriate, a mechanically reliable and mechanically stable connection of the seal with the first bearing ring can be created. Likewise, z. B. the aforementioned membrane area of the elastomeric structure cover a recess in the reinforcing structure or bridge.

In such a seal according to an embodiment, the elastomeric structure may include a diaphragm portion and a connection portion, wherein the connection portion between the reinforcing structure and the diaphragm portion is arranged and formed such that the deformation of the elastomeric structure is at least partially caused by deformation of the connection portion. Thus, in addition or as an alternative to a deformation of the membrane region itself, the connection region between the elastomer structure and the membrane region can also contribute to a change in shape and thus to pressure equalization. The connection region may, for example, be wave-shaped, fold-shaped, S-shaped or in another way, so that this allows easy deformability of the elastomeric structure.

In such a seal according to an embodiment, the connecting portion may be formed so as to allow the deformation of the elastomeric structure at least partially by a movement of the diaphragm portion along an axial direction of the bearing. The axial direction of the bearing can in this case correspond, for example, to an axis of symmetry of the seal, ie coincide with it or run parallel thereto.

Thus, a seal according to one embodiment, for example, be configured rotationally symmetrical. For example, a component may have n-fold rotational symmetry, where n is a natural number greater than or equal to 2. An n-fold rotational symmetry is present when the component in question, for example, about a rotational or symmetry axis by (360 ° / n) is rotatable and thereby merges substantially in terms of form in itself, ie with a corresponding rotation substantially to itself in the mathematical sense is mapped. By contrast, in the case of a complete rotation-symmetrical design of a component in any rotation about any angle about the axis of rotation or symmetry, the component essentially transits itself in terms of its shape, so it is essentially mapped onto itself in the mathematical sense. Both an n-fold rotational symmetry as well as a complete rotational symmetry is referred to here as rotational symmetry.

In a seal according to an embodiment comprising a reinforcing structure, the reinforcing structure may include a support portion adapted to be placed on the first bearing ring such that the bearing portion statically seals the seal against the first bearing ring. As a result, if appropriate, a sealing effect of the seal can be improved.

The contact area of the reinforcing structure may for example be subjected to a smoothing process, so that it can unfold a corresponding static sealing effect with an optionally ground or rotated counter surface.

In such a seal according to one embodiment, the support region may at least partially comprise an elastomer on a side facing the first bearing ring. In this way, it may be possible, if necessary, to further increase the sealing effect of the support area for the static seal of the seal relative to the first bearing ring.

A bearing according to an embodiment comprises an inner ring and an outer ring and a seal according to an embodiment, which is connected to the outer ring and with respect to the inner ring without contact. Such a bearing according to an embodiment may further comprise a contacting further seal, which is arranged on a side facing away from the seal between the inner ring and the outer ring. The inner ring can in this case be designed such that it forms a substantially closed volume together with the seal, the further seal and the outer ring. The seal and the further seal can in this case be designed such that the seal allows such a change in shape that even with a pressure change, for example due to heating or a cooling, of a gas in the volume during operation of the bearing, the further seal the inner ring and the outer ring is always touched. This may make it possible, if necessary, to prevent leakage of a lubricant and / or an entry of contaminants through the further seal in a subsequent re-cooling.

In other words, the reinforcing structure and thus optionally the seal can be designed in the form of a cap. Thus, for example, the first bearing ring may be the outer ring of the bearing, the second bearing ring may be the inner ring of the bearing.

In embodiments of a bearing or a gasket, the elastomeric structure may in principle be made of any suitable elastomer for the corresponding operating conditions. For example, acrylonitrile-butadiene rubber (NBR = Nitrile Butadiene Rubber) as well as silicone rubber, fluororubber, ethylene-propylene-diene rubber (EPDM = ethylene-propylene-diene monomer) can be used. Optionally, the elastomeric structure may be wholly or partially reinforced by a fabric, such as a polyester fabric, a carbon fiber fabric, or another fabric to ensure the strength and / or mobility of the elastomeric structure. Depending on the specific implementation and design of such a seal, for example, by the use of a corresponding fabric reinforcement, the seal may be designed for higher pressures, which are for example about a factor 10 higher than those in which no fabric reinforcement is implemented. However, it may also be possible to optionally use a thinner and therefore more sensitive membrane through the fiber reinforcement.

The reinforcing structure may for example be made of a metal or an alloy, for example of a sheet-like workpiece by means of a deep-drawing process. For example, it may be a workpiece made from a sheet metal. Of course, it may also be advisable, if appropriate, to produce the reinforcing structure on the basis of a machining process, if necessary. In principle, in addition, another material can be used for the reinforcing structure, for example a plastic, which is optionally reinforced by fillers or fibers, for example. Depending on the specific implementation, duration of use and place of use, it may be advisable in this case to additionally implement an additional metal structure in order, for example, to improve a long-term stability of the seal.

In such a seal, the elastomeric structure may for example be at least partially thin-walled. Thus, the elastomer structure, for example, in the membrane region and / or in the connection region have wall thicknesses that are between 0.2 mm and 3 mm. However, in other embodiments, a wall thickness may also be at least 0.3 mm, at least 0.4 mm, or at least 0.5 mm. Also, if necessary, the wall thickness of the elastomer structure in the above-mentioned ranges may be, for example, at most 2 mm, at most 1.5 mm, or at most 1 mm.

Of course, the elastomer structure may also have different wall thicknesses or thicknesses in different areas. For example, in the membrane region, a greater but also a smaller thickness than in the possibly implemented connection region can be provided. Likewise, if appropriate, a greater and / or a smaller thickness can be implemented in a further region of the elastomer structure, via which, for example, a corresponding connection to the first bearing ring is created.

The elastomer structure and optionally implemented reinforcing structure can in principle be connected to one another using a wide variety of joining techniques. For example, these can be connected to one another by means of a non-positive, positive and / or material connection. For example, the elastomeric structure may be connected to the connection structure by means of a vulcanization process. This is a frictional or frictional connection by stiction, a cohesive connection by molecular or atomic interactions and forces and a positive connection by a geometric connection of the respective connection partners come about. The static friction thus presupposes in particular a normal force component between the two connection partners.

In one embodiment of a seal, the reinforcing structure may at least partially have a cup-like and / or annular structure, via which, for example, the connection to the first bearing ring can be created. Likewise, the connection structure may comprise the already mentioned above central recess over which the elastomeric structure may extend, for example, completely away. Thus, for example, in the region of the recess, the elastomer structure may have the membrane structure, wherein the membrane region may be connected to the reinforcing structure via the already mentioned optional connection region.

The bearing according to an exemplary embodiment may be, for example, a rolling bearing, but also a sliding bearing. Regardless of this, the bearing may be, for example, a radial bearing. In the case of a rolling bearing may be in terms of the question of Wälzkörpergeometrien in this example, spherical rolling elements, cylindrical rolling elements, roller-shaped rolling elements, needle-shaped rolling elements, barrel-shaped rolling elements or frustoconical rolling elements. In other words, it may be a ball bearing, a cylindrical roller bearing, a needle bearing or a tapered bearing. Of course, bearings according to an embodiment, regardless of the question of their execution as a rolling bearing or slide bearing single-row or multi-row, for example, two rows, three rows or with a correspondingly higher number of rows are executed.

Hereinafter, embodiments will be described and explained in more detail with reference to the accompanying drawings.

1 shows a cross-sectional view through a bearing with a seal according to an embodiment;

2 shows a cross-sectional view through another bearing with a seal according to an embodiment; and

3 shows a cross-sectional view through another bearing with a seal according to an embodiment.

In the following description of the attached figures showing embodiments, like reference numerals designate like or similar components. Further, summary reference numbers are used for components and objects that occur multiple times in one embodiment or in a drawing, but are described together in terms of one or more features. Components or objects which are described by the same or by the same reference numerals may be the same, but possibly also different, in terms of individual, several or all features, for example their dimensions, unless otherwise explicitly or implicitly stated in the description.

1 shows a cross-sectional view through a bearing 100 according to an embodiment in which, as the following description will show, more specifically, a double-row angular contact ball bearing 110 is. The warehouse 100 has a first bearing ring 120 on, which is an outer ring 130 is. The warehouse 100 further comprises a second bearing ring 140 , which is an inner ring 150 is, which is executed in several parts in the embodiment shown here. So has the second bearing ring 140 here a basic body 160 on, on which a first career 170-1 is formed. The inner ring 150 also includes another body 180 at which a second career 170-2 is formed. The outer ring 130 Accordingly, each comprises a first mating track and a second mating track 190-1 . 190-2 that the two careers 170 of the inner ring 150 are opposite. For holding the other body 180 is the main body 160 this beaded, so as a positive connection of the two parts of the inner ring 150 , that is the basic body 160 and the other body 180 to accomplish.

The raceways 170 and the mating tracks 190 For example, in the case of a production of the body 160 , the other body 180 and the outer ring 130 made of steel as part of a grinding and optionally a curing of the same. Between the raceways 170 and the corresponding mating tracks 190 are at the in 1 embodiment shown spherical rolling elements 200 arranged, which are the two rows of rolling elements of this camp 100 form.

The rolling elements 200 of the camp 100 be in the embodiment shown here by two cages 205-1 . 205-2 guided and kept at a distance. These are optional components, which may for example also be designed as a common cage. However, the implementation of such a cage may possibly be completely eliminated.

Of course, in other embodiments of a bearing 100 According to one embodiment, other Wälzkörpertypen, for example, roll-shaped, needle-shaped, frusto-conical or cylindrical rolling elements are used. Depending on the specific implementation, it may be advisable in such a case, the careers 170 and the mating tracks 190 according to the geometries of the rolling elements 200 adapt.

Likewise, of course, bearings 100 according to an embodiment also be implemented with more or less than two rows. Also, a warehouse can 100 be implemented as a sliding bearing according to an embodiment. In such a case, the raceways 170 and the mating tracks 190 - Be replaced by corresponding sliding surfaces - regardless of their number. In summary, raceways 170 . 190 and corresponding sliding surfaces as well Functional surfaces of the respective bearing rings 120 . 140 or the relevant warehouse 100 designated.

The warehouse 100 further comprises a seal 210 according to an embodiment, in turn, an elastomeric structure 220 having. The elastomer structure can in principle be made from any material that is technically suitable for a seal in the relevant field of application. For example, it may be the elastomer of the elastomer structure 220 acrylonitrile-butadiene rubber (NBR = Nitrile Butadiene Rubber), silicone rubber, fluororubber or ethylene-propylene-diene rubber (EPDM = ethylene-propylene-diene monomer). This may optionally be reinforced by a fabric, which may include, for example, a polyester fabric or other fibrous and wearable material. For example, it may be carbon fiber or fiberglass fabric. In principle, other techniques for enhancing the elastomer structure 220 may be used.

The seal 210 is here designed such that it at least partially a volume 230 between the first bearing ring 120 and the second bearing ring 140 in terms of one in that volume 230 sealing medium. The medium in question may be, for example, a lubricant or a lubricant, for example an oil, a grease or another for lubricating the rolling bodies with respect to the raceways 170 . 190 act suitable material. The terms "lubricant" and "lubricant" are used synonymously.

The seal 210 is, as will be explained below, in this case designed such that the medium, so for example, the lubricant, the seal 210 can not happen. So it is with the seal 210 thus it is not a labyrinth seal or a gap seal in which it is fundamentally possible to diffuse or pass through the relevant medium through the gap or the labyrinth.

The elastomer structure 220 is in this case formed and formed so that this at a pressure change on one side of the elastomer structure 220 reacts with a change in shape, without essentially resulting in a change in their sealing effect during the change in shape. So it is not just a touching seal, in which there is a risk that the sealing lip lifts from the corresponding counterpart component, if it should possibly but should come to a very small change in shape.

This is how the seal points 210 at the in 1 embodiment shown a membrane area 240 on, which is just designed so that the change in shape of the elastomer structure 220 by a bending of the membrane area 240 is possible. So can the membrane area 240 as he is in 1 is shown, for example along an axial direction 250 expand.

The volume 230 in which, for example, the two kä 205 as well as the rolling elements 200 at the camp shown here 100 are arranged, so is the seal 210 and another seal 260 limited. The further seal 260 represents a contacting seal with a corresponding sealing lip, both with the first bearing ring 120 as well as with the second bearing ring 140 is in contact, so this touches. In the embodiment shown here, the further seal 260 with the first bearing ring 120 (Outer ring 130 ) rotatably connected, wherein a sealing lip of the further seal 260 with a corresponding sealing surface, which also on the body 160 is formed, is in contact. In other words, the sealing lip of the further seal 260 with the inner ring 150 So the second bearing ring 140 , in contact.

Because of the elastomeric structure 220 now by a change in shape of a pressure change on one side of the elastomer structure 220 can react without this changes their sealing effect, so can improve the sealing behavior of the seal 260 even at different operating or environmental conditions, so for example at different temperatures and / or pressures, be achievable, since a reduced pressure difference can minimize or prevent media exchange. So can the volume 230 , which is also referred to as internal volume, for example, be at least partially filled with a lubricant. Is it due to a change in operating conditions - either due to a change in external influence or due to the operation of the bearing 100 - To a temperature increase or an external pressure drop, can now in the volume 230 a next to the medium (lubricant) contained gas, so for example air, due to the change so increase in volume that due to the change in shape of the elastomer structure 220 a lifting of the sealing lip and thus a brief collapse of the sealing effect of the further seal 260 be prevented or prevented. In this way, therefore, in the case of an increase in the temperature of the bearing 100 an outlet of the lubricant may be prevented. The same may apply if, for example, an external pressure on the bearing 100 acts, abates abruptly.

In the case of a falling or falling temperature of the warehouse 100 on the other hand, there is a risk that this is in the volume 230 located gas contracts in such a way that through the further seal 260 Gas flows into the bearing from the outside. This could be laden with particles and other contaminants and thus damage the camp 100 or the lubricant contained. Thus, due to a corresponding decrease in temperature or a corresponding increase in an external pressure, if appropriate, the sealing lip of the further seal 260 at least for a short time of the corresponding sealing surface on the body 160 lift off, so that the contaminants in the volume 230 can penetrate.

At the seal 210 According to one embodiment, this problem is solved by the fact that in the seal 210 a flexible rubber membrane (elastomeric structure 220 ) that allows it to be in the volume 230 air volumes contained in the different temperature conditions of the warehouse 100 can change with the least possible resistance. Through the implementation of the elastomer structure 220 So it may be possible, a volume balance between a cold and a warm operating condition of the camp 100 to allow for pressure differences between an interior and an exterior space of the warehouse 100 minimized, but at least reduced, without causing a collapse of the sealing effect of the further seal 260 comes. Thus, optionally, a discharge of the lubricant, so for example a grease, but also a water entry, dirt entry or other contamination entry into the camp 100 be prevented. Likewise, if necessary, a fixed eyes of the seals, which can lead to a high rotational resistance and a corresponding lip wear, optionally be prevented.

The warehouse 100 as it is in 1 is shown here represents a wheel bearing, which includes mounting devices for attachment to the corresponding components. So are both on the outer ring 130 as well as on the inner ring 150 in the embodiment shown here flange connection structures 270 provided over which the warehouse 100 can be mounted in the vehicle concerned. Because of this, the stock becomes 100 Also referred to as a storage unit or unit briefly.

The inner ring 150 is in the embodiment of a bearing shown here 100 just formed such that this together with the seal 210 , the further seal 260 as well as the outer ring 130 the volume 230 between the two bearing rings 120 . 150 limited. For this purpose, the main body 160 a section 280 extending substantially perpendicular to the axial direction 250 , that extends along a radial direction. The main body 160 is therefore essentially cap-like or cup-shaped, with the volume 210 on an outer side of the body 160 and thus of the camp 100 is formed.

It concerns with the camp 100 thus to a bearing unit for a non-driven wheel of a vehicle, more precisely in the present embodiment to a wheel bearing for a non-driven wheel of a passenger car. For this reason, the unit is often referred to as a hub unit (HUB unit) without drive functionality. A hub with drive functionality can with such a seal 210 according to one embodiment, for example be equipped, if it can be mounted or mounted after mounting a corresponding drive shaft.

In addition to a use as a wheel bearing bearings 100 according to an embodiment, also in the range of fans of passenger cars and trucks, so as for example as a fan bearing, such as in conjunction with a viscous coupling, are used. These also often involve the challenge of sealing a seal against the environmental influences and against leakage of grease on one side of the bearing, but frequently results in a high temperature difference between operation and a standstill of the bearing.

This difference can also cause the air inside the unit to expand during operation of the bearing and release the overpressure in a conventional bearing via the outward-opening main lip of the seal. In turn, grease or other lubricant can be discharged and is thus no longer available for lubrication. In the opposite case, there is also the danger that the main lip of a cooling unit is sucked accordingly, which can produce a high resistance when starting and possibly lead to increased lip wear. In addition, it may mean a suction of water, dirt and other contaminants, usually as soon as it comes to a relative movement between the seal and the bearing ring in question. Conventionally, it has been attempted to at least partially compensate for this by using a cover on the respective bearing, by structurally restricting an air volume inside the corresponding bearing unit to as low a value as possible.

At a warehouse 100 According to one embodiment, there is the possibility with a Reduced risk of grease discharge, dirt or water entry and / or increased lip wear over the lifetime to operate with better lubrication, so possibly an increased life could be achieved for an otherwise identical bearing compared to a conventional storage unit.

Of course, bearings can 100 and / or seal 210 According to one embodiment, also be used in other technical systems than the previously described wheel bearings and the fan bearings. At the corresponding warehouse 100 This may be, for example, a viscous coupling used at another point in vehicle or plant construction.

The seal 210 as they are in 1 is shown here is formed in such a way, although with the first bearing ring 120 of the camp 100 However, it is with regard to the second bearing ring 140 designed such that it is straight to this contactless, so it is not in communication or contact. This can cause wear of the seal 210 and / or friction may be reduced. Constructively, this is at the in 1 realized solution realized by the fact that the seal 210 is designed essentially pot- or cap-shaped. For this purpose, the seal has a reinforcing structure 290 on, one to an outer shape of the bearing 100 has adapted shape. The reinforcing structure 290 is here on the one hand with the elastomer structure 220 connected and on the other hand so formed that this on the first bearing ring 120 of the camp 100 is fastened. The reinforcing structure 290 , and thus the seal 210 , Are via a positive connection, in the present case via a press fit, with the first bearing ring 120 serving outer ring 130 frictionally or positively connected. The reinforcing structure 290 does not stand with the second bearing ring 140 that is the inner ring 150 in touch.

To get the best possible static seal of the seal 210 with respect to the first bearing ring 120 to allow the reinforcing structure has a support area 300 on, which is just arranged and designed to be on the first bearing ring 120 to be placed on. So can the support area 300 For example, to improve the static sealing effect of the seal 210 opposite the first bearing ring 120 have been subjected to a smoothing process in this area. Likewise, on the first bearing ring 120 a corresponding counter-sealing surface must have been subjected to a corresponding surface treatment so that it is, for example, turned or ground in order to allow the best possible static sealing effect.

Likewise, if necessary, to improve the static sealing effect of the support area at least partially on a first bearing ring 120 facing side have an elastomer, which of the elastomeric structure 220 can be separated, but also connected with this run. For example, it may be a part of the elastomer structure that is vulcanized thinly in this area 220 act.

Of course, in other embodiments, other implementations of the elastomer structure 220 , the reinforcing structure 290 as well as the other in 1 shown constructive features are implemented. Thus, for example, the membrane area 240 the elastomeric structure 220 different from the reinforcing structure 290 be attached. In the camp shown here 100 According to one embodiment, the reinforcing structure 290 a conical section 310 on, at a central recess 320 the reinforcing structure 290 is arranged. At this conical section 310 that is axially on the section 280 of the basic body 160 extends to, is in the embodiment shown here a bearing 100 the elastomeric structure 220 more precisely the membrane structure 240 attached. In this way, if appropriate, even with an expansion or deformation of the membrane region 240 along the axial direction 250 to the outside, ie in 1 to the right, a total measure of the camp 100 along the axial direction 250 kept constant.

2 shows a further embodiment of a warehouse 100 according to an embodiment, which differs from the in 1 shown only with regard to the exact design of the elastomer structure 220 the seal 210 different. With regard to the other components is therefore related to the description 1 directed.

The elastomer structure 220 the seal 210 out 2 points next to the membrane area 240 furthermore, a connection area 330 on top, between the reinforcement structure 290 and the membrane area 240 is arranged. More specifically, the connection area 330 the elastomeric structure 220 with the conical section 310 the reinforcing structure 290 connected and has an S-shaped structure. This is the membrane area 240 the elastomeric structure 220 closer to the section 280 of the basic body 160 moved, so compared to the camp 100 out 1 the volume 230 between the bearing rings 120 . 140 is reduced.

The connection area 330 is here designed so that the change in shape of the elastomer structure 220 at least partially by a deformation of this connection area 330 can be effected. If, for example, there is an increase in pressure in the volume 230 , may alternatively or in addition to a deformation of the membrane area 240 also the connection area 330 be subject to deformation, so that the volume 230 can adapt accordingly to the newly prevailing pressure conditions. Thus, in such a case, the deformation of the connection area 330 For example, a movement of the membrane area 240 along the axial direction 250 be enabled by the structure of the connection area 330 is compressed further.

But even in the case of a temperature reduction, if appropriate, a corresponding deformation of the connection area 330 in the opposite direction to a reduction of the relevant volume 230 lead, so in this case the membrane area 240 closer to the section 280 of the basic body 160 disengaged.

At the in 2 shown embodiment of a bearing 100 or a seal 210 may depending on the specific embodiment, both a deformation of the connection area 330 as well as the membrane area 240 occur at the same time. Such a parallel deformation could in the case of in 1 not shown, because this straight no significantly deformable connection area 330 includes.

3 finally shows another embodiment of a warehouse 100 as a cross-sectional view, which differs only slightly from that in the figures shown above. Apart from the differently designed seal 210 according to one embodiment, the in 3 shown representation, for example, with regard to the cutting plane through the camp 100 , So here are the corresponding rolling elements 200 to recognize more clearly while the corresponding Kä 205 be at least partially obscured by these. Also, the flange connection structures 270 to recognize more clearly.

With regard to the exact design of the seal 210 the two elastomeric structures differ 220 from the 2 and 3 essentially with regard to the exact configuration of the connection area 330 , This is formed in the present case stronger meandering or fold-like. In addition, the connection area opens 330 not, as previously shown, radially outboard into the membrane area 240 but is based on a radial extent of the membrane area 240 slightly offset inwards. This forms a small section 340 of the membrane area 240 depending on the deformation of the connection area 330 if necessary, can come into contact with it and so limit a movement of the same. The section 340 thus serves as a limiting element (stop element) or stop to the movement of the elastomer structure 220 due to deformation or change in shape of the connection area 330 to restrict.

Accordingly, also the connection area 330 another section 350 on, at one of the section 340 opposite side of the elastomer structure 220 is arranged and also a movement or deformation of the connection area 330 limited by contact with the same. He also serves as a stop. This can cause a deformation of the connection area 330 along the axial direction 250 through one or both sections 340 . 350 be limited.

The connection area 330 is compared to the connection area 330 of in 2 embodiment shown executed more meandering. As a result, if necessary, a lighter deformation of the connection area 330 be achieved, so that the change in shape of the elastomer structure 220 as a whole with the in 3 shown embodiment stronger by a deformation of the connecting portion 330 is effected. A change in shape of the membrane area 240 Therefore, in the exemplary embodiment shown here, it may only then become essential if the change in shape due to the connection region 330 already completed and through the appropriate section 340 . 350 was limited.

Only for the sake of completeness should be mentioned at this point that the seal 210 for example, can be rotationally symmetrical. It may, for example, thus have completely rotationally symmetrical, but possibly also only one natal rotational symmetry. In principle, however, there is also the possibility of the seal 210 asymmetric.

By using a seal 210 According to one embodiment may optionally have a sealing behavior of the seal 210 be improved in different conditions.

The features disclosed in the foregoing description, the claims and the drawings may be significant and implemented both individually and in any combination for the realization of an embodiment in its various embodiments.

LIST OF REFERENCE NUMBERS

100

 camp

110

 Angular contact ball bearings

120

 first bearing ring

130

 outer ring

140

 second bearing ring

150

 inner ring

160

 body

170

 career

180

 another body

190

 Mating track

200

 rolling elements

205

 Cage

210

 poetry

220

 elastomeric structure

230

 volume

240

 membrane region

250

 axial direction

260

 additional seal with sealing lip

270

 Flanschverbindungsstruktur

280

 section

290

 reinforcing structure

300

 support area

310

 conical section

320

 central recess

330

 connecting area

340

 section

350

 another section

Claims (10)

Poetry ( 210 ) for a warehouse ( 100 ), a first ( 120 ) and a second bearing ring ( 140 ), having the following features: an elastomeric structure ( 220 ), the seal ( 210 ) is designed to at least partially a volume ( 230 ) between the first ( 120 ) and the second bearing ring ( 140 ) to seal with respect to a medium; the seal ( 210 ) is formed such that the medium the seal ( 210 ) can not happen; and wherein the elastomeric structure ( 220 ) is designed such that, upon a pressure change on one side of the elastomer structure (FIG. 220 ) reacts with a shape change without substantially changing the sealing effect during the shape change. Poetry ( 210 ) according to claim 1, wherein the seal ( 210 ) is adapted to be connected to a first bearing ring ( 120 ) of the warehouse ( 100 ) and the gasket ( 210 ) is further formed so that it is in relation to one of the first bearing ring ( 120 ) different second bearing ring ( 140 ) is non-contact. Poetry ( 210 ) according to one of the preceding claims, in which the elastomeric structure ( 220 ) a membrane region ( 240 ) configured to change the shape of the elastomeric structure ( 220 ) at least partially by a bending of the membrane region ( 240 ). Poetry ( 210 ) according to any one of the preceding claims, further comprising a reinforcing structure ( 290 ), which with the elastomeric structure ( 220 ) and adapted to be attached to a first bearing ring ( 120 ) of the warehouse ( 100 ) to be fastened. Poetry ( 210 ) according to claim 4, wherein the elastomeric structure ( 220 ) a membrane region ( 240 ) and a connection area ( 330 ), wherein the connection region ( 330 ) between the reinforcing structure ( 290 ) and the membrane area ( 240 ) is arranged and designed such that the change in shape of the elastomeric structure ( 220 ) at least partially by a deformation of the connecting region ( 330 ) is effected. Poetry ( 210 ) according to claim 5, wherein the connection region ( 330 ) is designed such that the deformation of the elastomer structure ( 220 ) at least partially by a movement of the membrane region ( 240 ) along an axial direction ( 250 ) of the warehouse ( 100 ). Poetry ( 210 ) according to one of claims 4 to 6, in which the reinforcing structure ( 290 ) a circulation area ( 300 ) formed to engage the first bearing ring (10). 120 ) be placed so that the support area ( 300 ) the seal ( 210 ) static with respect to the first bearing ring ( 120 ) seals. Poetry ( 210 ) according to claim 7, wherein the support area ( 300 ) at least partially on a first bearing ring ( 120 ) facing side has an elastomer. Camp ( 100 ) having the following features: an inner ring ( 150 ) and an outer ring ( 130 ); and a seal ( 210 ) according to one of the preceding claims, connected to the outer ring ( 130 ) and related to the inner ring ( 150 ) is non-contact. Camp ( 100 ) according to claim 9, further comprising a contacting further seal ( 260 ), which on one of the seal ( 210 ) facing away from the inner ring ( 150 ) and the outer ring ( 130 ), wherein the inner ring ( 150 ) is formed such that this together with the seal ( 210 ), the further seal ( 260 ) and the outer ring ( 130 ) a substantially closed volume ( 230 ), and wherein the seal ( 210 ) and the further seal ( 260 ) are formed such that the seal ( 210 ) allows such a change in shape that even in the case of a pressure change, one in the volume ( 230 ) during operation of the bearing ( 100 ) the further seal ( 260 ) the inner ring ( 150 ) and the outer ring ( 130 ) always touched.

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