FR2574138A1 - BEARING FOR LONGITUDINAL AND / OR ROTATION MOVEMENTS - Google Patents

Abstract

A BEARING FOR LONGITUDINAL AND OR ROTATIONAL MOVEMENTS HAS A BEARING BODY 2 SURROUNDING THE SHAFT AND THE EXTERIOR SURFACE 3 OF WHICH IS RADIALLY SUPPORTED IN THE BORE 6 OF A CARRIER RING 4. ON EACH SIDE OF RING 4, IT IS PROVIDED A LOCKING RING 8 EQUIPPED WITH SEVERAL PROJECTIONS 11 WHICH ELASTICALLY FIT IN ONE OR MORE RECESSES 12 OF THE EXTERIOR SURFACE 3. SO THAT DIFFERENT AXIAL POSITIONS OF ONE OR BOTH FRONT SIDES 7 OF THE RING 4, BEARING BODIES 2 MAY BE USED AND LOCKING RINGS 8 OF THE SAME CONFIGURATION, SEVERAL RECESSES 12 AXIALLY SHIFTS ARE PROVIDED IN SURFACE 3, SO THAT THE PROJECTIONS 11 CAN BE ENGAGED WITH AXIAL OFFSET IN THE RECESSES 12 OF THE BEARING BODY 2 CORRESPONDING TO THE AXIAL POSITION AND OR TO THE WIDTH 22 OF THE RING 4.

Description

1 Bearing for longitudinal and / or rotational movements This

  The invention relates to a bearing for longitudinal and / or rotational movements, with a bearing body surrounding a shaft and the outer surface of which is supported radially in the bore of a support ring, and with two locking rings respectively arranged each side of the carrier ring and each having one or more projections which fit elastically into one or more recesses made on the outer surface of the body

  bearing and which are each provided with a bearing face bearing axially

  outwards in the corresponding recess, and a segment

  annular protruding above the outer surface of the

  bearing housing and having a lateral face which rests axially-

  inwardly against an opposite end face of the carrier ring. A bearing of this type is known, where the bearing body has on each of its sides an annular groove intended to receive a

  locking ring resiliently recessed in the radial direction (short-

  vet DE-1 912 976). The disadvantage of this known level is that, for

  each width of the support ring, either an-

  modified form locking rings, i.e. bearing housings

  as a reciprocal distance between the two annular grooves modifies

  trusted accordingly. Due to the large number of bearing bodies and / or locking rings which must be manufactured separately for each use case corresponding to a given width of carrier ring, the known bearing cannot be mass produced

profitably.

  Consequently, the present invention aims to provide

  a bearing for longitudinal and / or rotational movements of the in-

  dique, with which one can, in spite of different axial positions

  of one or both of the end faces of the bearing ring mounted on the outer surface of the bearing housing, use bearing bodies

  and locking rings of identical configuration.

-2-

  1 According to the invention, this objective is achieved by the fact that more

  their recesses are, at determined axial distances from each other, formed on at least one side of the bearing housing in the external surface of the latter so that the projection (s) of the locking ring can be engaged with offset axial in the recess (s) of the bearing body corresponding to the respective axial position and / or to the respective width of the support ring. With the arrangement according to the invention, the possibility is obtained of axially fixing bearing rings of different widths on the same bearing body with locking rings of identical configuration. In addition, a carrier ring of given width can be

  fixed by being offset axially on the same output bearing body

  te such that the lines of action of the load on the bearing transmitted from the bearing body to the carrier ring pass through the middle of the force transmission faces of the carrier ring. In this way, the carrier ring is prevented from undergoing tilting loads

harmful offsets.

  According to an advantageous configuration of the invention, the locking ring is configured with symmetrical sides; a simple mounting of the bearing is thus obtained, because the locking rings can be engaged in the corresponding recess (s) of the bearing body by being offset laterally, without the axial position of the lateral face of the locking ring resting against the front of

the carrier ring is modified.

  According to another advantageous configuration of the invention, the part

  annular tie of at least one of the two locking rings has a

  external lateral face axially opposite the lateral face is

  puissant inwards, and the projection (s) have an internal support face axially opposite to the support face resting

  outwards, the two axial distances between the two faces la-

  teral and opposite bearing faces having different values;

  as a result, the rotation of the locking ring 180 and engages

  ment of its projection (s) in the same recesses results in a

  axial wedging of its lateral face turned axially inwards.

  -3- 1 The two locking rings of a bearing can be configured

  asymmetrically and be embedded in the corresponding recesses

  bearing of the bearing body so that the projection (s) of one of the locking rings are arranged being offset axially towards its external lateral face, while the projection (s) of the other locking ring are arranged being offset axially towards its inner side face. If in this case the two locking rings have come out of the recess (s), turned 180 and engaged in the

  or the same recesses, only the axial position of the ring

  on the outer surface of the bearing housing changes. In the other case, if only one of the locking rings has come out of the

  recesses, turned 180 and engaged again in this or these recesses

  ment, a modified distance is obtained between the lateral faces turned axially inwards of the two locking rings. In

  As a result, a support ring can then be fixed with a large

  properly modified between the two locking rings on the

  outer surface of the bearing housing.

  According to an additional characteristic of the invention, the evi-

  dements practiced on the outer surface of the bearing body are distributed in lateral symmetry with respect to a radial median plane of the bearing body. According to a new characteristic, the distances

  axial between] the recesses of the bearing housing have different values

  annuities, in accordance with the different widths of the carrier ring.

  According to a preferred embodiment of the invention, for a

  bearing with a bearing body consisting of a man-shaped cage

  chon with at least one guide slot passing through it radially, at least one bar covering from the outside the guide slot (s) and supported by its external face in the bore of the carrier ring, and load transmitting rolling elements which roll in the longitudinal direction in the guide slot (s), between the bar and the shaft, the recesses are formed in the outer surface of the

  cage and / or in the external face of the bar (s). A characteristic

  additional tick then provides that, for a bearing with several bars arranged at a distance from each other on the circumference of the cage and each covering from the outside a guide slot

2S74138

  -4- 1 of] .a cage,] recesses are made in the external surface of the cage only in] the area between] the neighboring bars

  each other on the circumference.

  Finally, according to a last advantageous characteristic of the invention.

  tion, the bearing body is produced by molding in a mold provided with

  radial drawers to form.

  The following description explains the bearing for long movements.

  tudinal and / or rotational according to]. the invention using three examples

  ples of embodiment shown in the appended drawing, which shows: in FIG. 1, a view, partly in longitudinal section, in the direction of arrow A of FIG. 2, of a bearing for longitudinal movements and of open rotation, in FIG. 2, a sectional view along BB of the bearing presented in FIG. 1,

  in Figure 3, the side view of one of the rings of b] .oeage of the pa-

  link shown in Figures 1 and 2, in Figure 4, a sectional view along CC of Figure 3, in Figure 5, a view, partially in longitudinal section, of a bearing provided with the bearing body shown in Figures 1 and 2, but with a carrier ring fixed on the outer surface of the narrower bearing body, and in FIG. 6, an enlarged partial longitudinal section view

of another bearing variant.

  In FIG. 1, the reference 1 designates a cylindrical shaft (represented

  felt in dotted lines) and the reference 2 a bearing body surrounding the shaft, allowing a longitudinal movement of the shaft 1. The cylindrical outer surface 3 of the bearing body is kept centered in the cylindrical bore of a bearing ring 4, and supported radially in this bore. In this case, the bearing ring 4 is designed as the inner ring of a needle bearing of a category of

  determined width, of a type known per se.

  Needles are aligned one behind the other on the circumference of the carrier ring 4; these needles roll in the circumferential direction between the inner track of the carrier ring 4 and the outer track of an outer ring 5 (Figures 1 and 2). The - 5 -

  1 outer ring 5 is mounted in the bore of a housing (not shown

  felt), and held axially and radially. The shaft 1 can thus be moved in the axial direction in the bore of the bearing body 2,

  as well as in rotation around its axis through the needles

  the. The support ring 4 has a cylindrical bore 6, on each side of which is attached a flat circular front face 7. On each of the two front faces 7 is supported laterally a locking ring 8 which projects inwards in the radial direction and is made of an elastically expandable plastic. The two locking rings 8 have an identical configuration. On the inner cylindrical edge 9 of its annular part 10, each locking ring 8 has several projections 11 facing radially towards

the interior (Figures 3 and 4).

  Each projection 11 is engaged in a rectangular recess

  corresponding 12 formed in the outer surface 3 of the body of the

  link 2. Several recesses 12 are arranged on the exterior surface.

  re 3 while being distributed in lateral symmetry with respect to a metallic plane

  radial dian 13 of the bearing body 2, and this at axial distances

  different 14 different (figure 1).

  Each projection 11 has a bearing face 15 axially facing outward which is fixedly supported on the opposite wall 16 of

  the corresponding recess 12, so that the locking ring 8

  holds the carrier ring 4 axially outwards (FIG. 5). The

  annular part 10 of the locking ring 8, which protrudes from the surface

  this outer 3, is clamped elastically inward in the radial direction by its inner edge 9. The annular portion 10 has a flat side face 17 axially turned inward which is in tight contact with the front face 7 of the ring carrier 4, and

  laterally supports the latter.

  In the present case, the bearing body 2 is constituted by a

  sleeve-shaped cage 18 with several guide slots 19 available

  placed on the circumference, which extend axially and pass radially through the cage, and with bars 20 which each cover from the outside one of the guide slots 19 and which are supported by an external face in the bore 6 of the carrier ring 4. Spherical rolling elements 21 are arranged one behind the other in each guide slot 19; they roll in the longitudinal direction between the bar 20 and the shaft 1, and thus transmit a radial load from the shaft 1 to the carrier ring 4 via the

bar 20.

  The sleeve-shaped cage 18 is made of plastic by injection molding. Both the recesses 12 and the guide slots 19 are, during the injection molding of the cage 18, formed in a manner known per se by radial drawers of a mold (not shown). The recesses 12 extend only at the level of the external surface 3, which is located between the bars 20 mutually

neighbors on the circumference.

  FIG. 5 represents a variant bearing for long movements.

  gitudinal and / or rotational, which presents the bearing body 2 shown

  felt in FIG. 1. For this bearing, a carrier ring 4 having a relatively reduced width 22 is fixed to the outer surface 3

  of the bearing body 2. Identical locking rings 8 are embedded

  very in recesses 12 of the outer surface 3; in accordance with the width 22 reduced relative to the bearing shown in Figure 1, these locking rings are arranged being axially offset

  inward from a given distance.

  The bearing ring 4 of the bearing shown in Figure 5 is designed

  as an inner ring of a self-aligning ball bearing

  bare. The balls 23 roll in the circumferential direction between the ring

  carrier 4 and the corresponding outer ring 24. The outer ring

  24 is mounted in a housing or other similar element (not shown). The bearing therefore again authorizes both a movement of the shaft 1 in the longitudinal direction and a rotational movement of

shaft 1 around its axis.

  The two locking rings 8 have projections 11 arranged asymmetrically with respect to their median plane. The bearing faces 15 of the projections ll of each locking ring 8, which bear in the recesses 12 and which are turned outwards, are at a relatively small axial distance 26 from the bearing faces 17 -7 1 corresponding, facing inwards. In comparison, the other lateral faces 25, facing outwards, of the locking rings 8 are located at a more steep axial distance 28 from the bearing faces.

  27 of the projections 11, facing inwards.

  The bearing shown in Figure 5 can without great effort be

  made from the bearing shown in Figure 1. During the trans-

  landing formation shown in Figure 5, we start by removing from their recesses the locking rings shown in Figure 1 and] .es remove axially outward from the bearing body 2. Then we remove axially to one side carrier ring 4 shown in FIG. 1. Finally, thread it in the middle of the outer surface 3 of the

  bearing housing 2 the carrier ring 4 presented in FIG. 5, from the

  geur 22 reduced. Finally, the two locking rings 8 are mounted on each side, without having to turn them at 1800, and they are engaged in the recesses 12 which, in accordance with the reduced width 22 (normalized), are arranged by being axially offset

towards the inside.

  If, with the bearing shown in FIG. 5, one of the two locking rings 8 shown in the drawing has come out of the recesses 12, turned to 180 and then engaged again in the same recesses 12,

  a width is obtained between the two locking rings 8

  slightly less than the width 22 shown in FIG. 5. The

  their from this reduction in width 22 corresponds to the difference

between distances 26 and 28.

  If the two locking rings 8 of the bearing shown in Figure 5

  came out of their recesses 12, turned 180 and then inserted again

  calf in the same recesses 12, a double reduction is obtained

  of width 22, in order to receive a carrier ring of reduced width

  consequent pick (not shown).

  Moreover, it is not necessary to reset in the same recesses 12 the locking ring 8 turned to 1800: one can engage the locking ring turned 8 turned in one of the recesses 12 located further inside or at the outside in the axial direction, so that a reduction or as the case may be increases the distance between the side face 25 of the turned locking ring - 8 - 1 8 and the side face 17 of the other locking ring not turned or also turned. A support ring (not shown) having widths which have been further modified can thus be fixed between the two

locking rings 8.

  In the present case, an annular groove 29 is provided on both sides of the bearing body 2, in which one of the

  two locking rings 8 or a usual stop ring (not shown

  for the axial fixing of an annular element added to

  the outer surface 3 -for example a sealing washer habi-

  trowel, laterally sealing the space for housing the balls 23.

  FIG. 6 shows another variant of a bearing for moving

  longitudinal and rotational elements, which also has the bearing body shown in Figure 1. The carrier ring 4 is here the inner ring of a rigid ball bearing fixed in the housing (not shown). Again, the two locking rings 8 are configured

with symmetrical sides.

  In the present case, the projection 11 of the locking ring 8 above

  Laughter drawn in Figure 6 is at an axial distance from the opposite end face 7 of the carrier ring 4 greater than the axial distance between the projection 11 of the lower locking ring 8 and the

  opposite front face 7 of the ring 4.

  If with this bearing, the two locking rings 8 are removed from the

  recesses 12, turned 180 and then engaged again in the same

  my recesses 12, we get when setting up the same ba-

  load bearing 4 or another load-bearing ring of the same width one inch

  different axial position of the carrier ring on the outer surface 3 of the bearing body 2. The carrier ring is then held on the outer surface 3 by being offset laterally (either upwards at

  FIG. 6) of the difference between the two axial distances 26, 28.

  Within the framework of the invention, it is possible to perform

  constructive changes compared to the exemplary embodiments

above.

  Thus, the bearing ring 4 of the bearing shown in FIG. 1 can be configured with an outer face of convex spherical shape and engage in neck by its outer face in one face.

2574 1 38

  -9- 1 bore of concave spherical shape of a housing or other similar element. A bearing is thus formed, where the shaft 1 is mounted with the possibility of tilting movement by sliding in the housing and with the possibility of rolling movement in the longitudinal direction inside the bearing body.

  The bearing housing can also be designed as an outer ring

  of a rotating bearing or as a plain bearing, so

  that it then fixes the shaft axially and only allows a mo-

  rotating rotation or both a rotational movement and a

longitudinal movement of the shaft.

  Instead of several recesses arranged one behind the

  others on the circumference of the outer surface of the body

  link, recesses can also be formed individually

  me of annular grooves arranged at an axial distance from each other

  very on this outer surface. The position of rotation of the locking rings on the outer surface of the bearing body is then not fixed. With the bearing of the two embodiments described above, these recesses in the form of annular grooves therefore extend both in the sleeve-shaped cage and in the bars of the

  bearing housing (see annular groove 29 in Figure 5).

  In order to increase the elastic effect of the locking rings, the latter can receive a through slot at a point on their circumference. The locking rings will then advantageously

  made of hard steel for springs, a material which has a

high load capacity.

  Locking rings need not be present on

  their inner edge of the projections arranged by being offset laterally

  Really: these rings can also be configured with

  symmetrical sides, so that the projections are arranged in posi-

  median tion between their two lateral faces. In this case, the posi-

  axial position of the carrier ring or of the lateral faces of the

  bearing ring on the outer surface of the bearing housing is uniform

  only determined by the mutual axial distances between the evi-

  dements provided on the outer surface of the bearing housing.

  Finally, it is not necessary that the bore section of the

  bearing ring is cylindrical: it can take any shape

  that, for example elliptical or even polygonal.

- 10 -

Claims (1)

1 CLAIMS 1. Bearing for longitudinal and / or rotational movements, with a bearing body surrounding a shaft and the outer surface of which is supported radially in the bore of a bearing ring, and with two locking rings respectively arranged each side of the bearing ring and each having one or more protrusions which fit elastically into one or more recesses made on the outer surface of the bearing body and which are each provided with a bearing face bearing axia ] outwardly in the corresponding recess, and of an annular segment projecting above the outer surface of the bearing body and having a lateral face which bears axially inwards against an opposite front face of the carrier ring, characterized in that several recesses (12) are, at axial distances (14) determined from one another, formed on at least one side of the bearing body (2) in the surface e outer (3) of the latter so that the projection (s) (11) of the locking ring (8) can be engaged with axial offset in the recess (s) (12) of the bearing body (2) at the respective axial position and / or at the respective width (22) of the carrier ring (4). 2. Bearing according to claim 1, characterized in that the locking ring (8) is configured with symmetrical sides. 3. Bearing according to claim 1, characterized in that the annular part (10) of at least one of the two locking rings (8) has an outer lateral face (25 or 17) axially opposite the lateral face (17 or 25) bearing inwards, and the projection (s) (11) have an internal support face (27 or 15) axially opposite to the support face (15 or 27) bearing towards the exterior, the two axial distances (26, 28) between the two lateral faces (17, 25) and the opposite bearing faces (15, 27) having different values. 4. Bearing according to any one of the preceding claims, characterized in that the recesses (12) formed on the outer surface (3) of the bearing body (2) are distributed in lateral symmetry with respect to a median plane radial (13) of the bearing body (2). 2574 1 38 - 11 -   1 5. A bearing according to any one of the preceding claims,   characterized in that the axial distances (14) between the evi-   elements (12) of the bearing housing (2) have different values,   formally at different widths (22) of the carrier ring (4).   6. Bearing according to any one of the preceding claims,   with a bearing body consisting of a sleeve-shaped cage with at least one guide slot passing through it radially, at least one   bar covering the guide slot (s) from the outside and hold   naked by its external face in the bore of the support ring, and of the load transmitting rolling elements which roll in the direction   longitudinal in the guide slot (s), between the bar and the   bre, characterized in that the recesses (12) are formed in the external surface (3) of the cage (18) and / or in the external face of the bar (s) (20).   7. A bearing according to claim 6, with several bars available.   placed at a distance from each other on the circumference of the cage and each covering from the outside a slot for guiding the cage,   characterized by the fact that the recesses are provided in the surface   this outer (3) of the cage (18) only in the area comprised between-   be the bars (20) adjacent to each other on the circumference.   8. A bearing according to any one of the preceding claims,   characterized in that the bearing body (2) is produced by   molding in a mold fitted with radial drawers to form the recesses ment (12).