FR2527283A1 - SEAL FOR ROLLING OR SMOOTH BEARING - Google Patents

Abstract

SEAL FOR A SMOOTH TIGHT ROLLING BEARING, COMPRISING AT LEAST ONE FIXING ELEMENT PROVIDED WITH A SEALING ELEMENT. ACCORDING TO THE INVENTION, THE FASTENING ELEMENT 4 HAS THE FORM OF A CAP AND HAS A SUPPORTING SURFACE 38 FOR THE BEARING EXTENDING ON THE CIRCUMFERENCE, THE SEALING ELEMENT 5 HAS A SEALING LIP S 'EXTENDING ON THE CIRCUMFERENCE OF THE JOINT AND PROVIDED CROSS-SECTIONALLY RELATIVE TO THE FIXING ELEMENT, AND THE FIXING ELEMENT IS REINFORCED.

Description

Seal for plain bearing.

  The invention relates to a seal for a plain bearing comprising at least one fixing element provided with a sealing element. In rolling bearings for example, the seals are intended to hold the lubricant in the bearing and to

  prevent ingress of dirt Roller bearings

  parts have outer and inner bearing rings

  lower, the outer bearing ring being fixed in a case and the inner bearing ring being joined integrally in rotation to a shaft extending through

  The bootmaker We know as seals covering discs

  spring effect, which are fixed either between the outer race ring and the wall of the case, or between

  the inner bearing ring and a shoulder of the shaft.

  In both cases, the free end is supported on the front side of the other bearing ring, so that the region between the two bearing rings is sealed from the outside. from the disc of

  covering constitutes the fixing element of the joint, tan-

  say that the free edge serves as a sealing element, which comes into contact with the front side of the bearing ring

  under elastic prestress The bearing ring ex-

  térieur is in direct contact by its external face with a wall of the boltier, so that the noises which occur

  felt when the shaft is rotated are transmitted to the box

  tier and are bothersome The direct support of the outer bearing ring on the wall of the case can also lead to excessive heat flow from the case to the bearing, and to premature wear of the latter In addition, the discs spring effect overlays are

difficult to set up.

  The object of the invention is to conform such a seal so

  that it provides high noise damping during operation

  operation of the rolling bearing, while being of a mounting

  simple and having a long service life.

  According to the invention, to achieve this aim, the fixing element

  tion has the shape of a cap and has a bearing surface

  for the bearing extending around the circumference, the sealing element

  sheaity has a sealing lip extending over it

  joint conference and arranged transversely to

  to the fastener, and the fastener is reinforced

strength.

  By its fixing element in the form of a cap, the seal according to the invention surrounds the bearing, which is adjacent to the bearing surface of the fixing element. This avoids direct contact between the external face of the bearing and the housing. in which the seal is mounted, and to a large extent the transmission of noise in the housing receiving the bearing The sealing element transverse to the fixing element can seal either with the ring

  inside of a rolling bearing, that is, if

  tion for a smooth bearing, with the shaft In addition, effective damping of vibrations of the entire

  bearing system is possible with the seal according to the invention

  In addition, the cap-shaped fastening element acts as an insulator and prevents excessive heat flow from the housing to the bearing, preventing premature failure of the bearing due to wear. The seal according to the invention is simple to assemble, because it is enough to thread it on the bearing by its fixing element in the form of a cap. The bearing can thus be provided with the seal before fitting into the case, which considerably simplifies the fitting * of the bearing, Thanks to the reinforcement, the fixing element can, in a secure manner, be press-fitted onto the bearing, ensuring a certain fit and a perfect seal. The sealing element is preferably in contact by a sealing edge. with the corresponding counter surface It is therefore not only possible to use the seal for sealing

  vis-à-vis the grime, but also use it for waterproofing

  cheesy for example with respect to oil.

  Other characteristics of the invention will emerge from

  claims, description and drawings.

  The invention will be described in more detail by means of a few embodiments represented by the drawings, in which:

  Figure 1 is an axial section of a first form of reaction

  reading of a seal according to the invention for a rolling bearing

  Lement # Figure 2 shows a second embodiment of a seal according to the invention for a plain bearing, Figure 3 is a representation similar to Figure 1

  of another embodiment of a joint according to the invention

tion for a rolling bearing,

  Figures 4 to 10 show other embodiments

  seals according to the invention The seals can be used both for bearings

  with bearings only for plain bearings The seal shows

  shown in Figure 1 is provided for a rolling bearing, having an inner ring 1 and an outer ring 2 between which are mounted rolling bodies 3, in the embodiment of the balls The seal includes a fixing element 4 and a sealing element 5, which seals on a peripheral surface

  outer 6 of the inner ring 1 The sealing element

  tee 5, is preferably a sealing lip, which rests

  by a sealing edge 7 on the peripheral surface 6.

  The fastening element 4 has a cylindrical configuration and comprises a cylindrical reinforcing body 8, which rests on almost its entire axial length on an outer peripheral surface 9 of the outer ring 2 The fastening element 4 is formed from a single piece with a bottom 10, which extends perpendicular to the axis of the fixing element and has a passage opening 10 'disposed in the center A curvilinear transition zone in cross section connects the reinforcement body 8 to an element of

  base 11 adjacent to a front face 12 of the outer ring

  upper 2 and extending radially beyond the ring ex-

  2 towards the inner ring 1 The bottom element 11 has the configuration of a washer, and the extreme edge 13 of the bottom element is located on an imaginary cylindrical surface 14 containing the centers M of the bodies

  bearing 3 The bottom element 11 thus offers a

  fastening face large enough for the sealing element

  cheity 5, while the bottom element is at a distance

  of the outer surface 6 of the inner ring 1 sufficient

  large enough for the sealing element 5 to be able to

  deform elastically without being hindered by the bottom element.

  The seal rests directly on a bearing surface 38, constituted by the inner wall of the reinforcement body 8, on the peripheral surface 9 and by its bottom element 11 on the end 12 of the outer ring 2 The radius of

  curvature of the transition zone 15 between the cylindrical part

  plate 8 'of the reinforcement body 8 and the bottom element 11 of the fixing element 4 is smaller than the transition radius between the outer surface 9 and the end 12 of the outer ring 2 It is thus ensured that during the fitting of the seal on the outer ring, the bottom element 11 in all cases bears on the end 12. The reinforcement body 8 has, over its axial length, a constant outer diameter and over almost all of its length; axial a uniform thickness In the region of the free end 16, the internal diameter of the reinforcement body 8 is greater than in the remaining region It follows that, in the region of its end 16, the body reinforcement 8 does not rest directly on the outer surface 9 of the ring 2 The reinforcement body 8 has a tapered wall portion 17, the axial length of which

  corresponds to approximately one fifth to one sixth of the length

  total axial length of the reinforcement body The bottom element 11 also has a constant thickness over its entire radial width, equal to the thickness of the cylindrical part of the reinforcement body 8 The reinforcement body 8 gives the joint the necessary mechanical resistance and is preferably made of metal It can however also be made of another material

  The thickness of the reinforcement body 8 is advantageous.

  less than 0.3 mm, so that the seal is thin and hardly increases the outside diameter of the rolling bearing. As a result, a large location is not necessary for the installation. landing place at

bearing fitted with seal.

  The reinforcing body 8 is provided, on its outer face, with a covering 18 made of an elastomer. The covering 18 comprises a cylindrical part 19, which rests on the part

  cylindrical of the reinforcement body 8, and one part of the coating

  ment 20 in the form of an annular washer arranged radially, which completely covers the external face of the bottom element 11 of the reinforcement body 8 The cylindrical covering part 19 overlaps the end 16 of the wall portion 17 and is in contact by an annular portion 21 with the inner wall of the wall portion 17 The inner face of the annular portion 21 forms a continuous extension of the inner face of the cylindrical reinforcement body part 8 In the region of the wall portion 17, the seal rests by the annular portion 21 made of material

  elastomer on the peripheral surface 9 of the outer ring

  2 The annular cylindrical portion 21 of the covering 18 is substantially thinner than the resting covering

  on the outer surface of the reinforcement body 8, and which pre-

  feels a substantially constant thickness over its entire

  axial length and its radial width The end face annu-

  the surface 22 of the covering 18 is flat and arranged perpendicular to

  the axis of the joint The end face 22 is connected by a conical face 23 to the cylindrical peripheral surface 24 of the covering 18, which is for its part connected by a conical face 25 to an external face 26 of the covering part 20 , arranged radially with respect to the axis of the joint The conical faces 23 and 25 ensure that the bearing is installed without difficulties in an annular groove in the boot housing receiving the bearing The end face 22 of the covering 18, spaced from the end face 16 of the cylindrical reinforcement body part, flush with the end faces 27 and 28 of the outer and inner rings 2 and 1, so that, in this region, the seal does not protrude relative to the rolling bearing and thus allows a setting

in place without problems.

  In order to be able to easily compensate for the mounting tolerances without affecting the sealing, the cylindrical peripheral face 24 is provided with a profiling 29 View in axial section, it has a wavy appearance, so that grooves are

  formed which extend around the circumference of the peri-

  cylindrical spherical 24 and are separated from each other

  by reliefs During the introduction of the rolling bearing

  In the annular groove of the case, the reliefs are deformed according to the mounting tolerances and moved axially so that the neighboring grooves fill up and that, in the mounting position, the coating

  Tement 18 has a smooth cylindrical outer surface.

  The outer face 26 of the radial coating part in

  shape of annular washer 20 is planar and arranged per-

perpendicular to the axis of the joint.

  the covering part 20 is extended by the sealing element

  square 5, which forms an acute angle with the axis of the joint and

  advances into the space surrounded by the cy-

  lindrique The external face 26 of the covering part

  curves in an external face 30 of the sealing element

  cheity 5, which follows roughly perpendicular to

  rement, by forming the sealing edge 7, an end face 31 of the sealing element 5, which in turn is connected to an internal curved face 32 which converges with the external face 30 in the direction of the element. of

  bottom 11 Due to this configuration, the sealing element

  cheity 5 has a frustoconical shape and narrows in cross section from the end face 31 The inside face 32 curves into an inside face 33, arranged

  perpendicular to the axis of the joint, of a part of coating

  annular washer-shaped 34, adjacent to the inner face of the bottom element 11 of the reinforcement body 8 and ending at a distance from the inner wall 35 of the outer ring 2 The thickness of the coating part 34 is less than the thickness of the coating part 20 and approximately equal to the thickness of the annular portion 21 of the coating 18 Due to the configuration described,

  the covering 18 overlaps the bottom element 11 at its end

moth 13.

  In the mounted position, the rolling bearing is in contact

  by the covering 18 with the bearing recess of the bootmaker.

  This largely prevents the transmission of

  noises in the case, so that in operation does not

  tervient that a very low noise production, In addition, the coating 18, made of elastomeric material, allows effective damping of vibrations of the entire bearing system The synthetic elastomeric material also prevents excessive heat flow from the shoemaker to the rolling bearing, so that in operation it does not

not overheating.

  The seal according to FIG. 2 is provided for a plain bearing

  cylindrical 36, in which a shaft 37 is rotatably mounted.

  The seal again includes a reinforcement body 8 a, which has a cylindrical configuration and protrudes axially at one end of the plain bearing 36. At this end, the reinforcement body 8 a is bent at right angles to a bottom element 11a arranged perpendicularly. to the axis A of the joint and having the shape of an annular washer The body

  reinforcement 8 a and its bottom element 11a have, on all.

  their length and all their circumference, a constant thickness.

  The radial width of the bottom element 11a is substantially smaller than the axial length of the cylindrical reinforcement body part, The reinforcement body 8a constitutes a part of the fixing element 4a of the joint, the sealing element 5 a is in the form of a sealing lip and

  rests by a sealing edge 7 a on the shaft 37 at

  axial tance of the plain bearing 36 The sealing element 5 a has the same configuration as in the embodiment

according to figure 1.

  The fixing element 4 a comprises, in addition to the reinforcement body

  strong 8 a, the covering 18 made of elastomeric material, which is provided both on the outer face and on the inner face of the reinforcement body 8 a, and completely envelops the latter The seal thus rests on the outer peripheral surface 40 of the plain bearing 36 not by the reinforcement body 8 a, but by the cylindrical covering part 39 adjacent to the internal wall 38 a of the reinforcement body part

  cylindrical The outer covering part 19 has already

  centered on the external face 41 of the cylindrical part of the reinforcement body has the same configuration as the covering part 19 of the joint according to FIG. 1 The internal part 39 of the covering is provided, on its internal wall, with a profiling 42 , corrugated in axial section, the configuration of which is the same as that of profiling 29 a

  of the outer face of the outer part 19 has coating

  When the seal is pushed onto the plain bearing 36, the manufacturing tolerances of the plain bearing 36 can be easily compensated by means of the internal profiling 42, in the case of a large external diameter of the plain bearing

  36, the reliefs of the profiling 42, extending over the circumference

  of the coating 18 a, are moved axially to the side,

  filling the neighboring grooves Thanks to the ex-

  térieur 29 a can also be compensated, during the installation in the case, the tolerances of the latter,

  as described in relation to Figure 1.

  The covering part 34 a, placed radially with respect to

  to the axis A of the joint, adjacent to the inner face of the element

  the bottom, is extended by the cylindrical inner covering part 39 which extends over the entire axial length of the cylindrical fixing element The two cylindrical covering parts 19 a, 39 have the same thickness, while the part of coating 34 a is about half as thick as the cylindrical coating parts On

  Also with this embodiment, there is a cushioning

  high noise during operation, because the return body

  strong 8 a is completely embedded in the coating 18 a The vibrations of the plain bearing 36 are moreover largely absorbed by the coating 18 a because of the elastomeric material The heat transmission from the shoemaker to the plain bearing is so reduced by the complete coating of the reinforcement body 8 a in the coating 18 a that the plain bearing does not

  not overheating and that the properties of

tion are not deteriorated.

  The seal according to FIG. 3 is also formed sem-

  blable to the joint according to figure 1 It also serves for a rolling bearing and differs only from the form of

  embodiment according to FIG. 1 in that the cylindrical part

  that 8 b ′ of the reinforcement body 8 b is also covered on its inner face by a portion of cylindrical covering 39 b The end face 22 b of the covering 18 b is connected, as also provided for the joint according to FIG. 2, by a conical surface 43 to the interior wall 44 of the cylindrical interior covering part 39 b According to the embodiment according to FIG. 2, the interior wall

  44 is provided with profiling 42 b of wavy shape in cross section

  side, so that the seal can be fitted without difficulty

  grown on the rolling bearing even if the tolerances

  on the outside diameter of the rolling bearing are wide.

  The cylindrical inner covering part 39 b extends to the inner face 45 of the bottom element llb of the reinforcement body 8 b The seal 2, like the two seals described above, is easily threaded on the bearing to bearing, the fixing element 4b of the seal having the configuration of a cap The mounting position of the seal is then reached when the bottom element llb of the reinforcement body 8b is in contact through its inner face 45 with the end face 12b of the outer ring 2 of the rolling bearing. The joint according to FIG. 4 has as a fixing element 4 c the cylindrical reinforcement body 8 c and a layer of varnish 46 which covers the inner face of the reinforcement body 8 c over almost its entire axial length The reinforcement body 8 it is preferably made of metal and is present on

  its entire length and around its periphery, a thickness

  aunt The reinforcement body can thus be made easy-

  by tube cutting The layer of varnish 46 is

  very thin compared to the thickness of the reinforcement body

  strong 8 c and serves to improve the adhesion of the reinforcement body to the outer ring 2 of the rolling bearing The end face 16 c of the reinforcement body 8 c is slightly recessed with respect to the end faces 27, 28 of the outer rings and inner 2, 1, so the end faces of the two

  rings constitute one of the ends of the rolling bearing

  ment provided with the seal The reinforcement body 8 c protrudes axially-

  the rolling bearing at the other end The protruding part 47 is used for fixing the sealing element c, shaped as a sealing lip and resting on the outer peripheral face 6 of the inner ring 1 of the bearing

  bearing by a peripheral sealing edge 7 c Con-

  formally to the embodiments described above, the sealing element 5 c is arranged at an acute angle

  with respect to the axis of the joint and enters the space between

  closed by the reinforcement body 8 c The sealing element is connected to a connecting element 48 in the form of an annular washer, placed perpendicular to the axis of the joint and away from the end faces 12; 49 of the outer and inner rings 2, 1 At its outer edge 50, the connecting element 48 has a thickened configuration in the direction of the reinforcement body 8 c, which penetrates through its protruding part 47 into the thickened outer edge 50 The body of reinforcement 8 c is thus surrounded at the end over its entire circumference by the thickened outer edge 50 The layer of varnish 46 extends to the outer edge 50 The sealing element 5 c and the connecting element 48 are made of a material synthetic elastomer The sealing element has, seen in axial section according to FIG. 4, a rectangular cross section, which tapers slightly in the direction of

  the free end The external faces 30 c and 31 c consist of

  killing the sealing edge 7 c form an obtuse angle between them and are each inclined on the axis of the joint A layer of varnish may be provided on the external face of the reinforcement body 8 c,

  in addition to or against the inner layer 46.

  In the embodiment according to FIG. 5, the reinforcement body 8 d is constituted in a similar manner to that of

  the embodiment according to FIG. 3 It also has

  Lely the cylindrical part 8 d ', which is connected by a curved part to the bottom element 11 d, which has the

  shape of an annular washer and is placed perpendicular to

  The reinforcement body is preferably made of metallic material, so that the fixing element 4 d of the seal is sufficiently rigid. The thickness of the reinforcement body is, as in the embodiments described above, preferably less than 0.3 mm The fastening element is thus only thin, so that the outside diameter of the rolling bearing is not appreciably increased by the seal The part cylindrical of the reinforcement body 8 d is covered, on its axial length and on its circumference, by two covering parts 19 d, 39 d which overlap the end 16 d of the cylindrical reinforcement body part 8 d 'and is mutually extend Each of the two covering parts 19 d, 39 d is provided with a profiling 29 d, 49 d

  which has, in cross section, a wavy shape.

  This gives the possibility, in accordance with the exemplary embodiment according to FIG. 3, to easily compensate for the tolerances both of the mounting location during the

  installation of the rolling bearing only during fitting

  joint seal In addition, the profiling guarantees an adjustment

  The seal part 39 d adjacent to the inner face of the reinforcement body part

  cylindrical 8 d 'extends to the bottom element 11 d, tan-

  say that the covering part 19 d resting on the external face of the cylindrical reinforcement body part 8 d 'goes up to the connection zone 15 d between the part of

  cylindrical reinforcement body 8 d 'and the bottom element 11 d.

  The sealing element 5 da has the same shape as the sealing element according to FIG. 4 and is connected to a connecting element 48 d, which however only extends over half of the radial width of the bottom element lld and is not connected to the two covering parts 19 d, 39 d The connecting element 48 d consists of two portions in the form of annular washers 51 and 52, formed in one piece with the sealing element 5 d, covering the bottom element lld on its inner and outer faces Thus, the radially inner edge of the bottom element lld is encased over its entire circumference in the connecting element The element & 'et 6 expiration 5 d and the coating 18 d not being linked to each other, the two parts can be made of different materials The materials

  can thus be optimally adapted to their applications

  respective cations In the embodiment according to FIG. 6, the reinforcement body 8 m is formed by the cylindrical reinforcement body part 8 m ′, connected by the curved transition zone 15 m to the bottom element llm which protrudes radially inwards with respect to the outer ring 2 of the rolling bearing The body part

  of cylindrical reinforcement 8 m 'is completely covered inside

  laughingly by the covering part 39 m, which rests on the outer peripheral surface 9 of the outer ring

  2 of the rolling bearing and is connected to the coating part

  external structure 19 m of the covering 18 b It has a profiling 42 m of wavy shape in axial section and covers the part of the reinforcement body 8 m 'almost to the transition zone 15 m The covering 18 m covers the end

  16 m from the reinforcement body part over its entire periphery.

  The 4 m fastening element goes to the end face 27 of the outer ring 2 The inner covering part 39 m is connected to the 51 m portion of the transition element

  48 m covering the inside of the bottom element 11 m.

  The bottom element 1 lm is coated, on its outer face,

  by the 52 m portion of the connecting element 48 m almost up to

  than at the transition zone 15 m The joint rests directly

  ment by the covering parts 39 m and 51 m on the outer ring 2 of the rolling bearing The transition element 48 has a frustoconical shape and extends outwards from the bottom element 11 m It ends roughly at mid-radial width of the inner ring 1 of the rolling bearing, the radially inner edge 55 of the connecting element 48 m embeds a portion 56 disposed radially

  a 5 m sealing element, comprising a cy-

  lindrique 57 disposed parallel to the axis of the joint, which is connected along a curve to the radial portion 56 in the form of an annular washer. The cylindrical portion 57 is in contact at its end with the end face 59 of the inner ring 1 of the bearing at bearing, roughly at mid-radial width thereof The sealing element 5 m formed in one piece may be made of metal, but also of plastic The connecting element 48 m is shaped so pushing the sealing element 5 m by its cylindrical portion 57 against the end face 49 of the

  inner ring 1 The connecting element 48 m is preferably relatively thin, so that it can exert on

  the sealing element 5 m a sufficient prestressing force

  santly high The portion 56 in the form of an annular washer is, from the cylindrical part 57, oriented towards the outside in the direction of the outer ring of the rolling bearing

  The embodiment shown in Figure 7 is cons-

  similarly shaped to the seal according to FIG. 4 Here also the sealing element 5 f is connected to the reinforcement body 8 f

  via the 48 f plane connecting element

  laid perpendicular to the joint axis The part: sail-

  lante 47 f of the reinforcement body is encased by its

  free mite in the thickened edge 50 f of the connecting element 48 f, so that the projecting part Le 47 f is surrounded by

  the outer edge on its outer face and its inner face

  The inner part 53 of the outer edge 50 f continues however to the end 16 f of the body of

  reinforcement 8 f and thus forms an interior lining part

  upper 39 f, which internally surrounds the reinforcement body over its entire circumference The covering part is provided on its inner face with a profiling 42 f having a wavy shape in axial section The covering part 39 f is formed in one part with connecting element 48 f and sealing element 5 f Easy assembly of the seal on the bearing is ensured by profiling 42 f The seal

  according to figure 8 differs only from the form of realization

  sation according to FIG. 7 in that the external part 54 and not the internal part of the thickened external edge 50 g is extended in the external coating part 19 g,

  which goes to the 16 g end of the cylinder reinforcement body

  drique 8% and is provided over the entire circumference of the body

  reinforcement The covering part 19 U is provided with the pro-

  spinning 29 g of wavy shape in axial section and connected

  in one piece with the 48 g connecting element and the element

  sealant 5 g Profiling 29 g ensures

  easy place of the seal in the case receiving the bearing.

  With this embodiment, the mounting tolerances

  of the mounting opening in the case can be com-

  thoughts thanks to profiling 291, while with the joint

  according to figure 7, the tolerances on the circumference ex-

  of the rolling bearing can be compensated for by profiling 42 f The interior or exterior coating part 39 f or 39 g being made of the same material as the sealing element 5 f, 52, a seal is also obtained on the outer face of the rolling bearing or on the outer face of the seal The sealing element 5 f; g resting on the outer peripheral face of the inner ring of the rolling bearing makes the bearing

  sealed bearing and also prevents partial access

  dirt deposits on the bearing bodies In the seal

  according to figure 9, the two parts 53 h, 54 h of the outer edge

  laughing 50 h are extended by the inner and outer covering parts 39 h, 19 h which cover the cylindrical reinforcement body 8 h internally and externally

  over its entire circumference and its entire axial length.

  The end is only free at 4 p.m., which is in the same radial plane as the ends of the coating parts at 7 p.m. and 39 h. Each of the two coating parts is provided with the profile from 29 h to 42 h. Ideal in cases where space available in the direction

  axial for mounting is sufficient.

  The seal according to FIG. Z O comprises the reinforcement body 8 i, formed by the cylindrical reinforcement body part 8 i 'and the bottom element lli disposed radially with respect to

  the axis of the joint, connecting along a curve to the

  reinforcing body tie 8 i 'The reinforcing body thus corresponds to the reinforcing body embodiments shown in Figures 1, 3, 5 and 6 It has the same thickness everywhere and is preferably made of metal The sealing element 5 i

  is made in the same way as in the de-reali-

  sation according to figures 4 to 9 It is connected directly-

  ment to the connecting element 48 i, the outer portion 52 i of which is adjacent to the outer face of the bottom element lli and which covers the latter almost up to the transition zone 15 i The portion 51 i of the connecting element 48 i resting on the inner face of the bottom element lli entirely covers the bottom element internally and is connected in a curve to the covering part

  interior 39 i, which covers the interior face of the

  tie of cylindrical reinforcement body 8 i 'and is connected to the outer covering part 19 i which rests on the

  outer surface of the cylindrical reinforcement body part

  drique The end 16 i of the cylindrical reinforcement body part 8 i 'is thus covered by the covering 18 i over the entire circumference of the reinforcement body The external covering part 19 i ends at a short distance from the transition zone 15 i between the cylindrical reinforcement body part 8 i ′ and the bottom element lli The transition zone 15 i is thus free on the outside, while

  that it is covered by the coating on the inside.

  A strong seal is thus obtained between the seal and the

  outer ring of the rolling bearing.

  The complete interior lining with the covering 18 i, preferably made of rubber, prevents corrosion from the inside. The transition zone 15 i not covered by the covering 18 i simply allows the addition of a

  assembly tool for fitting the seal.

  In all the embodiments described, the fixing element of the seal is in the form of a cap and open on one side, so that it can be simply threaded onto the rolling bearing. In all the embodiments, the reinforcement body has only a very small thickness, less than 0.3 mm, so that the seal does not greatly increase the size of the rolling or plain bearing,

  and the location provided for mounting the roller bearing

  The attachment element should not be increased significantly.

  tion of the seal threaded on the rolling bearing acts as

  a kind of insulator, which prevents excessive heat flow

  high clearance from the boot to the bearing Insofar as the fastening elements are provided with a coating of elastic material, a high damping of the vibrations of the whole bearing system is also obtained. Furthermore, the fastening element coating the bearing acts as a noise damping element, which at least to a large extent prevents transmission of noise from the bearing into the housing which receives it. There is therefore no strong noise production when using bearing bearings

  bearings or rails fitted with the seals described

  elements can be glued to the reinforcement bodies; however

* they are preferably vulcanized in place on them

  ci, so that one obtains a solid bond between the coating and the reinforcement body The danger is thus excluded that the coating withdraws from the reinforcement body during the fitting on the bearing or the installation in the bearing housing The seals described and shown

  can be used for roller bearings as well

  Only for plain bearings In the case of plain bearings, the sealing element rests on the shaft o must be sealed, as shown for the example of embodiment according to FIG. 2 In rolling bearings, the sealing element rests on the peripheral surface

  outer ring and insulates from the outside

  laughing at the space between the two rings of the rolling bearing.

Claims (10)

Claims.   1 seal for rolling and / or plain bearing, comprising   at least one fixing element provided with a sealing element   cheeness, characterized in that the fixing element (4) has the shape of a cap and has a bearing surface (38) for the bearing extending around the circumference, that the sealing element (5 ) has a sealing lip   extending around the circumference of the joint and arranged trans-   versally with respect to the fixing element, and that   the fixing element is reinforced.   2 Joint according to claim 1, characterized in that   the fastener has a cylindrical shape and has-   at one end a bottom (10) extending transversely to the axis of the seal, which is formed in part by the sealing element (5) and has a passage opening (10 ') arranged in the center.   3 Seal according to one of claims 1 and 2, characterized in   that the fixing element (4) has a reinforcement body strong (8).   4 Joint according to claim 3, characterized in that   the reinforcement body <8) is made of metallic material.   Seal according to one of claims 3 and 4, characterized   in that the reinforcement body (8) also has the form a cap.   6 Seal according to one of claims 3 to 5, characterized   in that the reinforcement body (8) is coated at least in its annular end region with the elastic material of the sealing element (5).   7 seal according to one of claims 3 to 6, characterized   in that the reinforcement body (8) has a cylindrical region   drique provided with an elastic coating formed by another   elastic material as the sealing element (5).   8 Seal according to one of claims 1 to 7, characterized   in that the sealing element (5) and the fixing element   tion (4) are about the same thickness.   9 Seal according to one of claims 3 to 8, characterized   in that the reinforcement body (8) is provided on its inner face   upper and / or outer with a coating of varnish.   Seal according to one of claims 1 to 9, characterized   in that the sealing element (5 c) is connected by the inter-   median of a connecting element (48), arranged transversely   ment to the joint axis, to the fixing element (4 c), pre-   ference to the reinforcement body (8 c).   11 joint according to claim 10, characterized in that the connecting element (48) has the shape of an annular washer and encased, by an outer edge (50), one end of the fixing element (4 c).   12 Seal according to one of claims 3 to 11, characterized   in that the sealing element (5 d, 5 m) surrounds, by a connecting element (48 d, 48 m) the bottom element (11 d, 11 m) disposed radially from the reinforcement body (8 d, 8 m) from from the radially inner edge.