FR2683278A1 - SEALING WASHER FOR BEARING GREASSE BY LUBRICANT SUPPLEMENT, ESPECIALLY FOR BALL BEARING. - Google Patents

Abstract

A sealing washer (8) for a bearing greased by adding lubricant, in particular for ball bearings, consists of a sheet metal washer mounted on an outer ring (1) of the bearing and defines with the other ring (2) of the bearing a sealing slot or is applied to said other ring (2) by a sealing lip. The L-shaped washer (8) comprises a radial wing (17) with several projections (18) distributed over the circumference which are applied against the front face (20) of one (1) of the rings. Lubricating holes (7) of a bearing body (6) are arranged such that they open into an annular chamber (13) defined by the washer (8) and the bearing body (6) and communicating with the bearing chamber (24) by free spaces (23) between the projections (18).

Description

Sealing washer for greased bearing with lubricant

  The present invention relates to a sealing ring for lubricated lubricant bearing, in particular for a ball bearing, which ring is constituted by a plate washer mounted on one of the bushing rings. rolling and sets with the other

  bearing ring a sealing gap or is applied by a

  seal on the other bearing ring.

  Sealing washers of this type are known.

  It is only possible, by means of expensive machining, to use the bearing housing of the bearings provided with such a sealing device. In these known bearings, one of the rings of

  bearing shall be provided with holes or grooves.

  The purpose of the present invention is to create a washer

  rolling seal of the type indicated in the introduction which

  put an extra lubrication on the bearing without the need for

  use holes or throats in one of the rings.

  The problem is solved according to the present invention by the fact that the sealing washer, seen in cross-section, has an L shape and its radial flange is provided with a plurality of circumferentially distributed projections which are applied by a face on the face. front of one of the rolling rings and in that the lubrication holes of a bearing body open into an annular chamber which is defined by the sealing washer and the bearing body or a

  bearing ring and is connected to the chamber by clear spaces.

between the projections.

  This arrangement provides a bearing which can be manufactured at low cost, can be lubricated with lubricant

  through a bearing body and can also withstand ef-

  strong axial through the sealing ring.

  According to the invention, the axial flange of the sealing washer is provided with lubrication holes which, on the side facing the bearing housing, open into the annular chamber defined by the washer and the bearing housing and , on the opposite side to the bearing body, open into

an other room.

  According to one embodiment of the invention, the axial flange of the sealing washer is mounted on the peripheral surface of one of the rolling rings and is immobilized in the axial direction.

by a suitable means.

  According to an alternative embodiment of the invention, the free end of the radial wing is folded inwards and engages in a

  annular groove of the outer ring.

  According to another variant embodiment of the invention, the ron-

  seal is supported by a radial flange on an elastic ring

  tick mounted in an annular groove of the bearing body.

  According to another variant embodiment of the invention, the ron-

  sealing membrane is mounted in abutment against a recess of the

bearing body.

  According to another embodiment of the invention, it is

  seen, between the surface of the bore of a bearing body and the perimeter surface

  of the axial wing, an annular chamber communicating with

  the lubrication hole of the bearing housing and the sealing washer

  a sealing lip which is applied to the bearing body and

  ensures the tightness of the chamber.

  According to another embodiment of the invention, the axially

  is provided with, from its free end, a plurality of circumferentially distributed lights extending to the defined chamber

  by the outer ring and the sealing washer.

  According to another embodiment of the invention, the wing departs from the bearing and forms an angle with the ox bore bearing body. According to another embodiment of the invention, the free end of the wing comprises a sharp edge and the largest diameter of the

  sealing ring in the free state is greater than the diameter of the bore

bearing body.

  According to another embodiment of the invention, the wing bears on a resilient ring mounted in an annular groove of the bearing body

  The invention is described below in detail with the aid of examples

  embodiments shown in the drawings.

  Identical elements are designated by identifiers

  The drawings show: Figure 1, part of a longitudinal section of a grooved ball bearing provided with a sealing washer according to the invention, Figure 2, a portion of the AB section of the bearing shown. in Figure 1,

  FIGS. 3 to 5, respectively a part of an outer ring

  FIG. 1 shows another embodiment of a sealing washer according to the invention, FIG. 6, a part of a bearing shown in FIG. 1 provided with a sealing washer which is placed next to the landing in

a bearing body bore.

  The grooved ball bearing bearing shown in the drawings

  1 and 2 consists of an outer ring 1, an inner ring 2

  and balls 3 which are arranged in grooves of the outer rings.

  inner and outer and are guided by a cage 4 The outer ring

  1 is engaged by its peripheral surface 5 in the bore of a

  bearing housing 6 which is provided with a lubrication port 7.

  The bearing is sealed by means of a washer

  the L-sealing 8, the axial flange 9 is threaded on a surface

  device 10 set back from the outer ring 1, a chamber 13

  nular remaining between the surface 11 of the bore of the bearing body 6 and the peripheral surface 12 of the axial flange 9, which chamber is

  closed by a sealing lip 14 disposed on the peripheral surface

  12 of the sealing washer 8 and communicates with the lubricating orifice 7 in the bearing body 6 The free end 15 of the flange 9 is folded inwards and engages in an annular groove 16 of the the outer ring 1 to immobilize the sealing washer in the axial direction The radial flange 17 of the sealing washer 8 is provided with a plurality of projections 18 distributed over the circumference which are each applied by a surface 19 against the face 20 of the outer ring 1 and maintain the radial flange 17 at a distance C from the end face 20 of the outer ring 1 The axial flange 9 has one or more lubrication holes 21 distributed on the circumference which

  open into an annular chamber defined by the outer ring

  1 and the sealing washer 8, which chamber communicates with the chamber 24 of the bearing by free spaces 23 formed respectively between two adjacent projections 18 The radial flange 17 of the sealing washer 8 is brought to the surface device 26

  of the inner ring 2 leaving only one space 25 and as-

  the tightness of the chamber 24 of the bearing between

1, 2.

  The embodiment shown in FIG. 3 differs from the arrangement described essentially by the fact that the orifices of

  6 of the bearing housing 6 open into an annul-

  re 27 defined by the bearing body 6 and the outer ring 1 and in that the axial flange 28 of the sealing washer 29 is applied against the surface 11 of the bore of the bearing body 6 and is provided with several lights 30 which extend from the free end, are

  distributed around the circumference and open into the chamber 31 defining

  By the outer ring 1 and the sealing washer 29 Thus, the lubricant pressurized into the bearing body 6 through the lubricating orifice 7 arrives in the chamber 31 via the lumens 30 and hence , is repressed in the manner described in

chamber 24 of the bearing.

  FIG. 4 shows a variant in which the perimeter surface

  of the outer ring 1 does not have a circumferential groove

  that the axial flange 32 of the sealing washer 33 is simply

  spun on the peripheral surface of the outer ring 1 and the sealing washer 33 is held in its position by an elastic ring 34 mounted in a groove 35 of the bearing body 6 The lubricant from the lubricating orifice 7 in the body Bearing 6 arrives in an annular chamber 36 defined by the bearing body 6 and the sealing washer 33 and, from there, is distributed by one or more bores 37

  distributed around the circumference of the axial flange 32 of the washer

  33, in the chamber 38 defined by the outer ring 1 and the sealing washer 33 and then arrives in the manner described above.

  in the chamber 24 of the bearing.

  In FIG. 5, the sealing washer 39 is immobilized

  in the axial direction on the outer ring 1 by means of a decoupling

  In this embodiment, the chamber

  41 is defined by the bearing body 6 and the annular groove 42 provided in the sealing washer 39, so that the lubricant coming from the lubricant supply port 7 of the bearing body 6 arrives in the distribution chamber 41 and from there

  reaches the bearing chamber 24 via the ori-

  lubrication unit 43 in the axial flange 44 of the sealing washer 39.

  FIG. 6 shows a sealing washer 45 according to the invention

  which is mounted in the bore 11 of the bearing body, next to the roller

  The radial flange of the sealing washer 45 is made

  placed in the same manner as the wing 17 described for example in Figure 1 The other wing 46 away from the bearing at an angle ox, towards the bore 11 of the bearing body The peripheral edge 47 to the free end of the wing 46 is sharp and the largest diameter of the washer 45 in the free state is greater than the diameter of the bore 11 of the bearing body so that, when fitting the washer sealing in the bore 11 of the bearing body, the edge 47 bites into the wall and blocks said sealing washer 45 When using a relatively hard material for the bearing body, it is possible to use a ring

  elastic band 48 (shown in phantom) mounted in an annular groove

  re of the bearing body 6 for a better immobilization of the washer-

  the sealing in the axial direction The lubricating orifice 7 in the

  bearing body 6 opens into an annular chamber 49 which is de-

  finished by the sealing washer 45, the bearing body 6 and the bearing ring 1 and communicates with the chamber 24 of the bearing by means of

  free spaces 23 between projections 18.

Claims (10)

  1 Sealing ring for lubricated lubricant bearing, in particular for ball bearings, consisting of a plate washer mounted on one of the bearing rings and defining with the other bearing ring a gap of sealing or is applied by a sealing lip on the other bearing ring, characterized in that the sealing washer (8, 29, 33, 39, 45) has an L-shaped cross section and its flange (17 ) is provided with a plurality of circumferentially-extending projections (18), which protrusions are applied by a surface (19) against the end face (20) of one (1) of the bearing races and the lubrication holes ( 7) of a bearing body (6) open into an annular chamber (13, 27, 36, 41, 49) which is defmed by the sealing washer (8, 29, 33,   39, 45) and the bearing housing (6) or a bearing ring (1) and   with the bearing chamber (24) via spacing   these free (23) between the projections (18).   Sealing washer according to Claim 1, characterized in that the axial flange (9, 28, 32, 44) of the sealing washer (8, 29, 33, 39) is provided with lubrication holes. (21, 30, 37, 43) which, on the side facing the bearing body (6), open into the chamber   ring (13, 27, 36, 41) and, on the side opposite the bearing body (6),   close up in a room (22, 31, 38).   3 sealing washer according to claim 1 or 2, characterized   characterized by the fact that the axial wing (9, 28, 32, 44) of the washer   (8, 29, 33, 39) is arranged on the peripheral surface (5, 10)   of one (1) of the bearing rings and is locked in the direction of   axially by suitable means (15, 34, 40).   4 sealing washer according to any one of the   cations 1 to 3, characterized in that the free end (15) of the radial wing (9) is folded inwards and engages in a groove (16)   ring of the outer ring (1).   Sealing washer according to any one of claims 1 to 3, characterized in that the sealing washer (33) is supported by its radial flange on an elastic ring (34) mounted in a groove (35) ring of the bearing housing (6) _   6 Sealing washer according to any one of the   cations 1 to 3, characterized in that the sealing washer (39) is mounted in abutment against a recess (40) of the bearing body.   7 Sealing washer according to any one of the   cations 1 to 4, characterized in that there is provided between the surface of the bore (11) of a bearing body (6) and the peripheral surface (12) of the wing (9) axial, an annular chamber (13) which communicates with the lubricating orifice (7) of the bearing body (6) and the sealing washer (8) has a sealing lip (14) which is applied   on the bearing body (6) and seals the chamber (13).   8 sealing washer according to any one of the   cations 1 to 4, characterized in that the axial flange (28) is provided, from its free end, with a plurality of circumferentially distributed openings (30) extending to the defined chamber (31). over there   outer ring (1) and the sealing washer (29).   Sealing washer according to claim 1, characterized in that the flange (46) deviates from the bearing and forms an oc   with the bore (11) of the bearing housing.   Sealing washer according to claim 9, characterized   in that a peripheral edge (47) disposed at the the wing (46) is bright.   11 sealing washer according to claim 9 or 10,   characterized by the fact that the largest diameter of the washer of   the free diameter (45) is greater than the diameter of the bore (11) of the bearing body.   12 Sealing washer according to any one of the   cations 9 to 11, characterized in that the wing (46) bears on a resilient ring (48) mounted in an annular groove of the bearing body.