DE102012215967A1 - Rolling bearing i.e. grooved ball bearing, for traction electric motor, has spinner disk extending at rolling elements in radial direction, where maximum radial diameter of disk is greater than diameter of rim in axial direction of bodies - Google Patents

Abstract

The bearing (100) has an inner ring (110) connected with a shaft of a machine. Rolling elements are arranged between the inner ring and an outer ring (120). A spinner disk (140) is connected with the inner ring. A labyrinth seal structure (150) is connected with the spinner disk and forms a labyrinth seal together with the outer ring. The spinner disk extends at the rolling elements in radial direction from an inner ring. Maximum radial diameter of the centrifugal disk is greater than diameter of a rim (154) in an axial direction of rolling bodies (130).

Description

Embodiments relate to bearings for moving machine parts and in particular to a rolling bearing with integrated labyrinth seal.

In mechanical and mechanical engineering bearings are used to guide against each other moving components. These bearings allow movements in desired directions and prevent movements in undesired directions. Depending on the applied principle of action, a distinction is made between plain and roller bearings. Rolling bearings are rolling elements between the mutually movable parts.

In rolling bearings, it is crucial for the life of the interior of the rolling bearing, in which the rolling elements are arranged to protect against external environmental influences, such as dust and water. Conversely, lubricants should be prevented from escaping from the rolling bearing.

For this purpose, various sealing systems are known, which differ depending on the type of rolling bearing and the requirements.

For example, today Traktionsmotorlagereinheiten with deep groove ball bearings or cylindrical roller bearings are realized and pre-lubricated for life. Such bearings can be sealed by means of sealing caps. In some applications, the sealing function of these sealing caps is insufficient and the bearing unit suffers from the ingress of water and / or dirt. This leads to a dramatic reduction in bearing life. For sealing, for example, double labyrinth seals can also be used. Other ways of sealing bearing units include, for example, the use of housings with contacting seals. In contact seals, however, wear is inevitable, resulting in a high maintenance.

Alternatively, standardized rolling bearings can be used in machines in which the sealing systems are realized by the components surrounding the bearing. However, this increases the effort that a manufacturer of machines or machine parts must spend, since he must ensure the sealing of the bearing itself.

There is therefore a need to provide a rolling bearing that requires low maintenance and low cost in the re-use.

This need is met by a roller bearing with integrated labyrinth seal according to claim 1.

A rolling bearing with integrated labyrinth seal according to an embodiment comprises an inner ring, an outer ring, rolling elements, a centrifugal disc and a labyrinth seal structure. The inner ring is connectable to a shaft of a machine and the rolling elements are arranged between the inner ring and the outer ring. The centrifugal disc is connected to the inner ring. Furthermore, the labyrinth seal structure is connected to the outer ring and together with the centrifugal disc forms a labyrinth seal. The labyrinth seal structure further forms alone or with the outer ring a gutter for liquid and solid contaminants, wherein the outer ring and the labyrinth seal structure each form a side surface of the gutter or the labyrinth seal structure forms both side surfaces of the gutter. The centrifugal disk surrounds the labyrinth seal structure in a region forming the labyrinth seal away from an edge of the side surface of the gutter facing away from the rolling elements in the axial direction in a distance forming the labyrinth seal. The centrifugal disc extends at a side facing away from the rolling elements in the axial direction in the radial direction from the inner ring to a maximum radial diameter of the centrifugal disc, which is greater than a diameter of the edge of the side facing away from the rolling elements in the axial direction of the gutter.

Embodiments is based on the finding that the integration of a non-contact labyrinth seal, which begins at one edge of a gutter for contamination protected by a centrifugal disc, a very reliable seal against liquid and solid contaminants can be realized, which in the further use of the bearing no additional effort more is required for mounting an external seal. Due to the good protection against contamination, the maintenance of the rolling bearing can be significantly reduced and the integration of the labyrinth seal in the rolling bearing of the effort to install the bearing in machine parts or machines can be reduced.

The shaft of the machine for which the rolling bearing is used, can be made very simple and inexpensive, since no complex shapes are necessary because the seal of the bearing is already integrated into the rolling bearing. The shaft only needs to be connected to the inner ring of the rolling bearing.

In some embodiments, the slinger and the inner ring are two-piece formed and / or the labyrinth seal structure and the outer ring are formed in two pieces. The rolling bearing can be assembled from easy to produce components. For example, the slinger may be connected to the inner ring and / or the labyrinth seal structure to the outer ring by a press fit.

Some embodiments include a trap chamber at the end of the labyrinth seal formed by the labyrinth seal structure and the slinger. The region forming the labyrinth seal thus extends from the edge of the side surface of the gutter formed by the labyrinth seal structure to the catching chamber. The trap chamber may be formed by a groove in the labyrinth seal structure or by two at least partially opposed grooves in the slinger and in the labyrinth seal structure. If, despite the labyrinth seal, contaminants should still enter the bearing, they can be collected and removed in the catching chamber, which further increases the reliability of the sealing function.

Embodiments of the present invention will be explained below with reference to the accompanying figures. These show:

1a a schematic cross section of a rolling bearing with integrated labyrinth seal;

1b a side view of the rolling bearing with integrated labyrinth seal 1a ;

2 a schematic view of a bottom of a rolling bearing with integrated labyrinth seal;

3a a schematic cross section of a rolling bearing with integrated labyrinth seal;

3b a side view of the rolling bearing with integrated labyrinth seal 3a ;

4a a schematic cross section of a rolling bearing with integrated labyrinth seal; and

4b a side view of the rolling bearing with integrated labyrinth seal 4a ,

In the following, in the case of different, described exemplary embodiments, the same reference numbers may be used in part for objects and functional units which have the same or similar functional properties. Further, summary reference numerals may be 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. Furthermore, optional features of the various embodiments may be combined with each other or interchangeable.

1a shows a rolling bearing 100 with integrated labyrinth seal as an embodiment. The rolling bearing 100 includes an inner ring 110 , an outer ring 120 , Rolling elements 130 , a slinger 140 and a labyrinth seal structure 150 , The inner ring 110 is connectable to a shaft of a machine and the rolling elements 130 are between the inner ring 110 and the outer ring 120 arranged. Further, the slinger 140 with the inner ring 110 connected. The labyrinth seal structure 150 is with the outer ring 120 connected and forms together with the centrifugal disc 140 a labyrinth seal. In addition, the labyrinth seal structure forms 150 alone or with the outer ring 120 a gutter 152 for liquid and solid impurities. This form the outer ring 120 and the labyrinth seal structure 150 one side surface of the gutter 152 or the labyrinth seal structure 150 forms both side surfaces of the gutter 152 , The slinger 140 encloses the labyrinth seal structure in an area forming the labyrinth seal from an edge 154 in the axial direction of the rolling elements 130 remote side surface of the gutter 152 away in a labyrinth seal forming gap. The slinger 140 extends to one of the rolling elements 130 in the axial direction facing away from the inner ring in the radial direction 110 up to a maximum radial diameter of the centrifugal disc 140 which is larger than a diameter of the rim 154 in the axial direction of the rolling elements 130 remote side surface of the gutter 152 ,

By integrating the labyrinth seal in the rolling bearing, the rolling bearing 100 be connected to a shaft of a machine with little effort. Furthermore, even the formation of a gutter a large amount of liquid and solid contaminants are prevented from entering the labyrinth seal. This causes the slinger 140 from the inner ring 110 to the edge 154 the side surface of the gutter 152 around the labyrinth seal structure 150 extends, for example, a direct impact of spray on the entrance of the labyrinth seal on the edge 154 the side surface of the gutter 152 be prevented. In this way, by the concept described a rolling bearing 100 be made available, which can ensure high reliability of the sealing function with little effort for further installation in machines.

About the inner ring 110 is the rolling bearing 100 connectable to a shaft of a machine. In other words, in the embodiment, the shaft of the machine is not part of the rolling bearing 100 , The rolling bearing 100 represents in this example a closed unit. The outer ring 120 may have a flange to the rolling bearing 100 to attach to a machine part.

As already described, the centrifugal disc extends 140 at one of the rolling elements 130 in the axial direction facing away from the inner ring in the radial direction 110 up to a maximum radial diameter of the centrifugal disc 140 which is larger than a diameter of the rim 154 the side surface of the gutter 152 , The diameter of the rim 154 may be a mean diameter, a maximum diameter or a diameter that is in the radial direction in the direction of the maximum diameter of the centrifugal disc 140 lies, his. The axial direction can be considered as a direction parallel to a rotational axis of the rolling bearing 100 (That is, about an axis around which the inner ring rotates in operation relative to the outer ring) runs, whereas a radial direction is orthogonal to the axial direction. The rolling elements 130 in the axial direction opposite side forms, for example, as well as in 1a shown an outer surface of the rolling bearing. It extends from the inner ring 110 to a diameter greater than a diameter of the rim 154 the side surface of the gutter 152 , This allows the slinger 140 especially spray water, but also other impurities, to prevent from direct entry into the rolling bearing. The slinger 140 may have a variable maximum radial diameter, preferably, the centrifugal disc 140 but at their the rolling elements 130 in the axial direction facing away from an annular geometry. This indicates the slinger 140 then in the radial direction a constant projection over the edge 154 the side surface of the gutter 152 to repel water spray and allow the formation of the gutter. In other words, the slinger 140 has in the radial direction, for example, a circular ring geometry whose inner diameter substantially (eg, except for a difference for a press fit) an outer diameter of the inner ring 110 corresponds and whose outer diameter is greater than a diameter of the edge 154 in the axial direction of the rolling elements 130 remote side surface of the gutter 152 ,

Under the rolling elements in the axial direction 130 remote side surface of the gutter 152 is that of the two side faces of the gutter 152 to understand that of the rolling elements 130 is further away in the axial direction (ie the outer side surface).

In the in 1a The example shown is the maximum radial diameter of the centrifugal disc 140 optionally also larger than an inner diameter of the outer ring 120 , The maximum radial diameter of the centrifugal disc 140 but can also be smaller than an inner diameter of the outer ring 120 be ( 4a ).

The labyrinth seal structure 150 forms alone ( 4a ) or with the outer ring 120 ( 1a ) a gutter 152 for impurities. In this case, for example, the outer ring 120 the rolling elements 130 in the axial direction facing side surface of the gutter 152 form and the labyrinth seal structure 150 the rolling elements 130 in the axial direction facing away from side surface of the gutter 152 form. The bottom of the gutter 152 can, depending on the configuration by the outer ring 120 or the labyrinth seal structure 150 be formed. The gutter 152 may extend along a part of the circumference or the entire circumference. In other words, the gutter 152 can the rolling bearing 100 surrounded by a ring. The side surfaces of the gutter 152 can be aligned substantially radially and the bottom surface of the gutter 152 may be substantially axially aligned.

The slinger 140 and the labyrinth seal structure 150 Together they form a labyrinth seal extending from one edge 154 in the axial direction of the rolling elements 130 remote side surface of the gutter 152 away between the slinger 140 and the labyrinth seal structure 150 extends. The distance between the centrifugal disc 140 and the labyrinth seal structure 150 in the area forming the labyrinth seal may vary or be constant. The edge 154 in the axial direction of the rolling elements 130 remote side surface of the gutter 152 is, for example, that edge of the labyrinth seal structure 150 up to which the side surface of the gutter 152 from the bottom of the gutter 152 extends in the radial direction. The edge 154 the side surface of the gutter 152 may have a variable radius, but preferably the radius is constant, so that the edge 154 has a circular geometry. Essentially, the labyrinth seal begins at the edge 154 the side surface of the gutter 152 if the slinger 140 for example, not more than 5 mm (or 2 mm or less) in the axial direction from the edge 154 starts away. For example, an edge of the centrifugal disc 140 and the edge 154 the one by the Labyrinth seal structure 150 formed side surface of the gutter 152 be aligned in the axial direction to each other. That means, for example, that the edge of the slinger 140 and the edge 154 the labyrinth seal structure 150 in the axial direction have no or negligible within the measurement and manufacturing tolerances distance. In the radial direction, the edge of the centrifugal disc 140 from the edge 154 the labyrinth seal structure 150 have a distance of less than 5 mm (or less than 2 mm, 1 mm or less) forming the beginning of the labyrinth seal.

The slinger 140 and the inner ring 110 may be formed in one piece or two-piece. Additionally or alternatively, the labyrinth seal structure 150 and the outer ring 120 be formed in one piece or two-piece. Are the slinger 140 and the inner ring 110 as well as the labyrinth seal structure 150 and the outer ring 120 formed in two pieces, the rolling bearing can be assembled from simple to produce individual components.

For example, the slinger 140 with the inner ring 110 and / or the labyrinth seal structure 150 with the outer ring 120 be connected by a press fit. Alternatively, these parts can for example also be connected to each other by screws.

The slinger 140 and the labyrinth seal structure 150 For example, they may be partially or wholly made of a metal (eg, steel). Alternatively, the slinger 140 and / or the labyrinth seal structure 150 partially or entirely made of an elastomer.

The rolling bearing 100 may be, for example, a deep groove ball bearing, a cylindrical roller bearing or a tapered roller bearing.

The labyrinth seal may be different from the edge 154 in the axial direction of the rolling elements 130 facing away, through the labyrinth seal structure 150 formed side surface of the gutter 152 first in substantially axial direction of the rolling elements 130 away, then in a substantially radial direction to the inner ring 110 towards and after in a substantially axial direction to the rolling elements 130 extend. The area forming the labyrinth seal is determined, for example, by the shape and arrangement of the centrifugal disk 140 and the labyrinth seal structure 150 determined and is for example through the gap between the centrifugal disc 140 and the labyrinth seal structure 150 educated. The labyrinth seal, so the area between the slinger 140 and the labyrinth seal structure 150 can have different geometries. A part of the labyrinth seal extends substantially in the axial direction when the extension of the gap between the centrifugal disc 140 and the labyrinth seal structure 150 significantly larger in the axial direction (eg more than twice as large, more than 5 times as large or more than 10 times as large) as the extent in the radial direction. Conversely, a portion of the labyrinth seal is substantially radially aligned when the gap between the slinger 140 and labyrinth seal structure 150 significantly larger in the radial direction (eg more than twice as large, more than 5 times as large or more than 10 times as large) as in the axial direction. In other words, the slinger 140 surrounds the labyrinth seal structure 150 at least first in the axial direction, then in the radial direction and then in the opposite axial direction. The slinger 140 can have a C-shaped cross section. In this case, the C-shaped structure has, for example, substantially axially aligned side surfaces and a substantially radially aligned surface connecting the side surfaces. The side surfaces can be the same length or different (such as in 1a and 3a ).

In operation, the centrifugal force in the radially aligned part of the labyrinth seal can prevent a large part of the contaminants from penetrating further into the bearing. Therefore, the radial part of the labyrinth seal can be made longer than each of the two axially aligned parts of the labyrinth seal in order to make better use of the centrifugal force effect.

For example, a labyrinth seal has at least two substantially axially aligned portions and a substantially radially aligned portion connecting the axially aligned portions or two substantially radially aligned portions and a substantially axially aligned portion connecting the radially aligned portions. The labyrinth seal may optionally include one or more further radially or axially aligned sections.

Optionally, the area forming the labyrinth seal may be from the edge 154 in the axial direction of the rolling elements 130 facing away, through the labyrinth seal structure 150 formed side surface of the gutter 152 up to a catching chamber 160 extend. The catching chamber 160 can through a groove 162 in the labyrinth seal structure 150 or by two at least partially opposite grooves 162 . 164 in the slinger 140 and in the labyrinth seal structure 150 be formed. In other words, regardless of the geometry of the labyrinth seal, the distance between the slinger may vary 140 and the labyrinth seal structure 150 increase significantly at the end of the labyrinth seal (eg to more than that Double, more than fivefold or more than tenfold), leaving a catching chamber 160 between the centrifugal disc 140 and the labyrinth seal structure 150 forms. In the catching chamber 160 Contaminants that reach the end of the labyrinth seal despite the labyrinth seal can be collected and removed. The catching chamber 160 can be formed by that in the slinger 140 and / or in the labyrinth seal structure 150 a groove 162 . 164 is arranged. It is sufficient to form a groove in one of the two components, but the effect of the trap chamber can be increased when the grooves are arranged in both components. The grooves can be the same size or different sizes both in the axial and in the radial direction and can be partially or completely opposite each other.

Optionally or additionally, the centrifugal disc 140 and the labyrinth seal structure 150 by their shape and arrangement between the catching chamber 160 and the rolling elements 130 form another labyrinth seal. As a result, on the one hand, it is possible to prevent contaminants from the catching chamber from penetrating deeper into the bearing 100 can penetrate and on the other hand lubricant from the warehouse 100 can escape into the catching chamber.

Alternatively, the other labyrinth seal also by the shape and arrangement of the inner ring 110 and the outer ring 120 (or through the inner ring and the labyrinth seal structure 150 or through the outer ring 120 and the slinger 140 ) are formed.

Furthermore, the bottom of the gutter 152 optionally or additionally a hole 156 to the between the labyrinth seal and the rolling elements 130 arranged catching chamber 160 exhibit a leakage of water from the catching chamber 160 to enable. The rolling bearing 100 should then be installed during installation in the designated machine part or machine so that the hole 156 oriented downwards (at the lowest point), so that by gravity water by itself in the annular catching chamber 160 flows to the drainage hole and there from the rolling bearing 100 exit. 2 shows an example of a view of the bearing 100 from below at the two-sided holes 156 provided in the gutters.

Optionally, alternatively or additionally, the centrifugal disc 140 one to the edge 154 in the axial direction of the rolling elements 130 facing away, through the labyrinth seal structure 150 formed side surface of the gutter 152 toward the radial direction, a tapered end 142 exhibit. In other words, the slinger 140 can be at a the edge 154 the gutter 152 facing a bevel at any angle (eg between 30 ° and 60 °), in particular 45 °, to the radial direction (or axial direction) have. By the tapered end can be a parallel to the radial direction surface extending at the end of the centrifugal disc 140 , So at the beginning of the labyrinth seal, can be prevented, adheres to the spray and can run into the gap of the labyrinth seal.

Optionally, additionally or alternatively, the outer ring / inner ring 120 . 110 or the labyrinth seal structure / slinger 150 . 140 have a groove. Between the outer ring / inner ring 120 . 110 and the labyrinth seal structure / slinger 150 . 140 can then in the groove an O-ring 158 be arranged to prevent entry of contaminants between the outer ring / inner ring 120 . 110 and the labyrinth seal structure / slinger 150 . 140 in the rolling bearing 100 to prevent.

Optionally, a slinger 140 and a labyrinth seal structure 150 according to the concept described symmetrically or in different geometry on both sides of the bearing 100 to be ordered.

1b shows suitably 1a a side view of the bearing 100 with integrated labyrinth seal. The position of in 1a shown radial cross section is marked with AA.

3a shows a schematic cross section of a rolling bearing 200 with integrated labyrinth seal as an embodiment. The rolling bearing 200 corresponds in many details to the in 1a shown bearings. However, unlike the one in 1a Deep groove ball bearings shown in FIG 3a a cylindrical roller bearing shown. Since the cylindrical roller bearing usually has a greater axial play, this can also be the case of the shape and arrangement of the centrifugal disc 140 and the labyrinth seal structure 150 be taken into account. For example, a distance between the slinger 140 and the labyrinth seal structure 150 be smaller in the axial portion of the labyrinth seal than in the radial portion. The distance between the centrifugal disc 140 and the labyrinth seal structure 150 can then be made larger in the radial portion than a occurring by the axial play of the cylindrical roller bearing maximum axial relative movement of the centrifugal disc 140 and the labyrinth seal structure 150 to each other. This allows the slinger 140 and the labyrinth seal structure 150 , which are each connected to a bearing ring, move relative to each other, so that there is no contact between the centrifugal disc despite axial play of the cylindrical roller bearing 140 and the labyrinth seal structure 150 comes and damage can be prevented.

The concept can also be used in other types of bearings to compensate for axial play.

In addition to the statements made here apply to the bearings in 1a and 2 made statements on necessary, optional, additional or alternative embodiments and implementation options.

3b shows suitably 3a a side view of the bearing 200 with integrated labyrinth seal. The position of in 3a shown radial cross section is marked with AA.

4a shows a schematic cross section of a rolling bearing 300 with integrated labyrinth seal as an embodiment. The rolling bearing 300 corresponds in many details to the in 1a and or 3a shown bearings. However, unlike the one in 1a shown by way of example that the maximum radial diameter of the centrifugal disc 140 also smaller than an inner diameter of the outer ring 120 can be. In addition, the gutter 152 also alone through the labyrinth seal structure 150 can be formed. Both side surfaces of the gutter can 152 through the labyrinth seal structure 150 be formed. Furthermore, optionally or additionally, the catching chamber 160 through a groove 162 in the labyrinth seal structure 150 (Without opposing groove in the centrifugal disc) can be formed.

In addition to the statements made here apply to the bearings in 1a . 3a and 2 made statements on necessary, optional, additional or alternative embodiments and implementation options.

4b shows suitably 4a a side view of the bearing 300 with integrated labyrinth seal. The position of in 4a shown radial cross section is marked with AA.

Some embodiments relate to a manufacturing method for a roller bearing with integrated labyrinth seal. The method includes providing an inner ring 110 , an outer ring 120 , of rolling elements 130 , a slinger 140 and a labyrinth seal structure 150 , The inner ring 110 is connectable to a shaft of a machine. Furthermore, the method comprises an assembly of the inner ring 110 , the outer ring 120 , the rolling element 130 , the slinger 140 and the labyrinth seal structure 150 to make the rolling bearing with integrated labyrinth seal. Among other things, the inner ring 110 with the slinger 140 , For example, by press-fitting, connected and the labyrinth seal structure 150 with the outer ring 120 , for example, also with a press fit, connected. Furthermore, the labyrinth seal structure 150 so formed and arranged and the rolling bearing joined together, so that the labyrinth seal structure 150 together with the centrifugal disc 140 forming a labyrinth seal. Furthermore, the labyrinth seal structure forms 150 alone or with the outer ring 120 a gutter 152 for liquid and solid impurities. This form the outer ring 120 and the labyrinth seal structure 150 one side surface of the gutter 152 or the labyrinth seal structure 150 forms both side surfaces of the gutter ( 152 ). The slinger 140 encloses the labyrinth seal structure 150 in a labyrinth seal forming area of an edge 154 in the axial direction of the rolling elements 130 remote side surface of the gutter 152 away in a labyrinth seal forming gap. The slinger 140 extends to one of the rolling elements 130 in the axial direction facing away from the inner ring in the radial direction 110 up to a maximum radial diameter of the centrifugal disc 140 which is larger than a diameter of the rim 154 in the axial direction of the rolling elements ( 130 ) facing away from side of the gutter 152 ,

Optionally, you can preview the examples in 1a to 3a described optional or additional embodiments can be realized by the manufacturing method by adding to the structural embodiments corresponding optional or additional process steps in the manufacturing process.

Some embodiments relate to a traction motor bearing unit with improved labyrinth seal. For example, this traction motor is designed with a rolling bearing with integrated labyrinth seal according to the concept described above. This realizes an improved labyrinth seal, in particular a liquid-collecting labyrinth seal, which can be integrated into a traction motor bearing unit.

The bearing unit can be used for example for supporting rotors of electric motors, in particular traction motors. The bearing can be for example a solid steel bearing, an INSOCOAT bearing (bearing with insulating coating on inner or outer ring) or a hybrid bearing.

The bearing unit can be sealed by an integrated, non-contact labyrinth seal. For example, the sealing system may be constructed in two parts and divided into three zones (an entrance area, an optional interior area, and an optional exit area).

The entrance area may for example have a gutter (labyrinth seal structure and / or part of the outer ring), where the water can be rejected and run off. In addition, the entrance area may have a curved centrifugal disc which can protect the sealing inlet from direct ingress of water and splash away the water. On the slinger, for example, a bevel may be arranged, for example, as large as possible (e.g., 45 ° with respect to a radial direction). In addition, the slinger may be aligned with the gutter. The first axial gap (used to throttle the water) is followed by a radial gap that can pump water back, followed by an axial gap. The inner region is, for example, a catching chamber with a gutter (groove) in the rotating (centrifugal disk) and / or in the non-rotating part (labyrinth sealing structure). Further, at the deepest position of the bearing unit, a drainage hole (of various possible shapes, e.g., round hole, elongated hole) may be provided at the position of the non-rotating part. The exit region may have another axial and radial gap where the remaining water can be throttled and pumped back. Additionally or optionally, the rotating and / or nonrotating member (labyrinth seal structure or slinger) may be sealed with an O-ring to prevent water leakage.

By preventing ingress of water, the storage service intervals can be significantly increased, meaning that the operator can reduce service costs or save on service costs. An advantage of the described concept is, for example, that it (the rolling bearing) is nevertheless a unit and, for example, no additional seals are necessary. When an interior design variant is used, it is almost impossible for water to enter the bearing, and the water can flow out of the bearing through the drainage hole. If a variant without a drainage hole is used, water that has already penetrated can not easily be removed from the bearing, but the sealing function can be better than in known solutions.

The features disclosed in the foregoing description, in the following claims and in the drawings may be of importance both individually and in any combination for the realization of the invention in its various forms.

Although some aspects of the present invention have been described in the context of a device, it will be understood that these aspects also constitute a description of a corresponding method such that a block or device of a device is also to be understood as a corresponding method step or feature of a method step is. Similarly, aspects described in connection with or as a method step also represent a description of a corresponding block or detail or feature of a corresponding device.

The embodiments described above are merely illustrative of the principles of the present invention. It will be understood that modifications and variations of the arrangements and details described herein will be apparent to others of ordinary skill in the art. Therefore, it is intended that the invention be limited only by the scope of the appended claims and not by the specific details presented with the description and explanation of the embodiments.

LIST OF REFERENCE NUMBERS

100

 roller bearing

110

 inner ring

120

 outer ring

130

 rolling elements

140

 slinger

142

 bevelled end of the centrifugal disc

150

 Labyrinth seal structure

152

 gutter

154

 Edge of the side surface of the gutter

156

 drainage hole

158

 O-ring

160

 trap chamber

162

 Groove in the labyrinth seal structure

164

 Groove in the slinger

170

 another labyrinth seal

200

 roller bearing

300

 roller bearing

Claims (10)

Roller bearing ( 100 . 200 . 300 ) with integrated labyrinth seal, with the following features: an inner ring ( 110 ) connectable to a shaft of a machine; an outer ring ( 120 ) and between the inner ring ( 110 ) and the outer ring ( 120 ) arranged rolling elements ( 130 ); a slinger ( 140 ), with the inner ring ( 110 ) connected is; and a labyrinth seal structure ( 150 ) connected to the outer ring ( 120 ) and together with the centrifugal disc ( 140 ) forms a labyrinth seal, the labyrinth seal structure ( 150 ) alone or with the outer ring ( 120 ) a gutter ( 152 ) forms for liquid and solid impurities, wherein the outer ring ( 120 ) and the Labyrinth seal structure ( 150 ) one side surface of the gutter ( 152 ) or the labyrinth seal structure ( 150 ) both side surfaces of the gutter ( 152 ), wherein the centrifugal disc ( 140 ) the labyrinth seal structure ( 150 ) in a region forming the labyrinth seal from an edge ( 154 ) in the axial direction of the rolling elements ( 130 ) facing away side surface of the gutter ( 152 ) in a distance forming the labyrinth seal surrounds, wherein the centrifugal disc ( 140 ) on one of the rolling elements ( 130 ) in the axial direction facing away from the inner ring in the radial direction ( 110 ) up to a maximum radial diameter of the centrifugal disc ( 140 ) which is greater than a diameter of the edge ( 154 ) in the axial direction of the rolling elements ( 130 ) facing away side surface of the gutter ( 152 ) extends. Rolling bearing according to claim 1, wherein the centrifugal disc ( 140 ) with the inner ring ( 110 ) and / or the labyrinth seal structure ( 150 ) with the outer ring ( 120 ) is formed in two pieces. Rolling bearing according to one of the preceding claims, wherein the centrifugal disc ( 140 ) with the inner ring ( 110 ) and / or the labyrinth seal structure ( 150 ) with the outer ring ( 120 ) are connected together by a press fit. Rolling bearing according to one of the preceding claims, wherein the labyrinth seal forming region of the edge ( 154 ) in the axial direction of the rolling elements 130 opposite side surface of the gutter ( 152 ) first in substantially axial direction of the rolling bearings ( 130 ), then in a substantially radial direction to the inner ring ( 110 ) and then in a substantially axial direction to the rolling bearings ( 130 ) extends. Rolling bearing according to claim 4, wherein the rolling bearing is a cylindrical roller bearing, wherein a distance between the centrifugal disc ( 140 ) and the labyrinth seal structure ( 150 ) is smaller in the axial sections of the labyrinth seal than in the radial section, wherein the distance between the centrifugal disc ( 140 ) and the labyrinth seal structure ( 150 ) in the radial portion is greater than a occurring by the axial play of the cylindrical roller bearing maximum axial relative movement of the centrifugal disc ( 140 ) and the labyrinth seal structure ( 150 ) to each other. Rolling bearing according to one of the preceding claims, wherein the labyrinth seal forming region of the edge ( 154 ) in the axial direction of the rolling elements 130 opposite side surface of the gutter ( 152 ) to a catching chamber ( 160 ), wherein the catching chamber ( 160 ) through a groove ( 162 ) in the labyrinth seal structure ( 150 ) or two at least partially opposite grooves ( 162 . 164 ) in the centrifugal disc ( 140 ) and in the labyrinth seal structure ( 150 ) is formed. Rolling bearing according to claim 6, wherein the centrifugal disc ( 140 ) and the labyrinth seal structure ( 150 ) by their shape and arrangement between the catching chamber ( 160 ) and the rolling elements ( 130 ) another labyrinth seal ( 170 ) form. Rolling bearing according to one of the preceding claims, wherein an edge of the centrifugal disc ( 140 ) and the edge ( 154 ) in the axial direction of the rolling elements 130 opposite side surface of the gutter ( 152 ) are aligned in the axial direction to each other, so that the labyrinth seal from the edge ( 154 ) of the side surface of the gutter ( 152 ), wherein the spray surface has a beveled end towards the edge with respect to the radial direction (FIG. 142 ). Rolling bearing according to one of the preceding claims, wherein the bottom of the gutter ( 152 ) a hole ( 156 ) to one between the labyrinth seal and the rolling elements ( 130 ) arranged catching chamber ( 160 ) to prevent leakage of water from the catching chamber ( 160 ). Rolling bearing according to one of the preceding claims, wherein the outer ring ( 120 ) or the labyrinth seal structure ( 150 ) has a groove and between the outer ring ( 120 ) and the labyrinth seal structure ( 150 ) in the groove an O-ring ( 158 ) is arranged and / or the inner ring ( 110 ) or the centrifugal disc ( 140 ) has a groove and between the inner ring ( 110 ) and the centrifugal disc ( 140 ) in the groove an O-ring ( 158 ) is arranged.

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