FR2541394A1 - BEARING FOR LONGITUDINAL MOVEMENTS - Google Patents

Abstract

A BEARING 2 FOR LONGITUDINAL MOVEMENTS ON A SHAFT 3 CONSISTS OF A CAGE 4 SURROUNDING THE SHAFT 3 AND PRESENTING AT LEAST ONE LONGITUDINAL GUIDING SLOT 5 THROUGH IT RADIALLY, OF A SUPPORT ELEMENT COVERING THE SLOT OUTSIDE. GUIDANCE 5 AND IMMOBILIZES LATERAL BETWEEN TWO END RINGS 12 ON THE CAGE 4 WHICH IS SUPPORTED IN THE BORE OF A HOUSING 1 AND ROLLER BODIES 6 BETWEEN THE SUPPORT ELEMENT AND THE SHAFT 3, TRANSMITTING THE LOAD AND MOUNTED IN A LINE IN THE GUIDING SLOT 5. TO ECONOMICALLY CHANGE THE LOAD CAPACITY OF BEARING 2, THE SUPPORT ELEMENT IS CHOOSED FROM ONE OR MORE TRUNCON (S) 9 OF STANDARD PLACE SHAPE ( S) DIRECTLY SIDE BY SIDE IN LONGITUDINAL DIRECTION AND MOUNTED ON A CAGE 4 OF CORRESPONDING WIDTH.

Description

1 -

  BEARING FOR LONGITUDINAL MOVEMENTS

  The present invention relates to a bearing for longitudinal movements on a shaft, consisting of a cage surrounding the shaft and having at least one longitudinal guide slot for the rolling bodies mounted in line, a bearing element covering the outside the guide slot (s) and supported in the bore of a housing, of rolling bodies transmitting the load, rolling between longitudinally directed bearing tracks of the support element and the shaft, and an end ring attached to each of the two ends of the cage and laterally immobilizing

the support element on the cage.

  A bearing for longitudinal movements is known

  of this type which can be manufactured economically in

  large series in certain standard dimensions (patent

  VET DE N O 25 57 351) When one wants to mount a bearing of load capacity greater than normal in a dwelling

  having a given bore, it must be equipped in a

  special support elements and cages so that it has a greater bearing width.

  bearings made in a special fabrication are

  Therefore, conventionally, when it comes to absorbing larger loads, two or more normal-sized bearings are mounted side by side.

  on the shaft and in the housing (US Patent No. 4,050,913).

  Each of the bearings placed side by side, however,

  a relatively short support element for the rotational bodies

  the load-carrying elements, two end rings

  to be mounted in the bore of the housing between the two support members.

  normal dimensions therefore requires a relative place

  tively large in the axial direction.

  The object of the invention is to provide a bearing for longitudinal movements of the type indicated which can be manufactured largely with standard elements well.

  we can, the diameter remaining the same, change its capacity

  -2- load city or its load-bearing width and thus adapt it

  the requirements of the intended application.

  According to the invention, the support element, for the

  the bearing capacity of the bearing of the same di-

  meter, is made up of one or more sections of standard shape which are placed directly side by side in the longitudinal direction and which, in case of

  standard of rolling bodies and end rings cor-

  correspondents, are mounted on a cage of corresponding width

dante.

  With the system of the invention, the bearing for longitudinal movements consists of standard elements that can be manufactured economically in large series To obtain a bearing load capacity different from that of the normal width bearing, there is more than 'at

  make a cage of different widths.

  The cage may be advantageously composed of two half-cages separated in a transverse plane and assembled by welding or a method similar to their joint located in

  this transversal plane Thus, the half-cages can be made

  Economically engineered plastic bricks in a single radial and / or axial slide injection molding mold By ensuring that the transverse plane of the joint

  the two half-cages go through the middle of a section of

  support bearing mounted on one of the two ends of the cage, can be used for all bearings with a determined outer diameter, a single half-cage joined by welding or gluing to the second demageage associated-de even

wider width or width.

  Preferably, the section (s) of the element

  are annular and are attached to a lateral surface.

  Thus, sections of steel tube or similar material can be soaked and ground in

  an economical production in large series.

  In another embodiment, the one or more

  section (s) of the support element are longitudinal plates

  3 and are mounted in the slot (s) guiding the cage Thus, each line of rolling bodies transmitting the load is supported radially outwardly on a

  plate (s) mounted side by side in the di-

  Longitudinal rection in the cage If these plates have beveled ends in the longitudinal direction and

  are thus supported in such a way as to be able to switch

  longitudinal rection in the bore of the housing, the

  transmitting the load of each queue are still char-

  uniformly if the shaft, as a result of bending or similar deformation, is inclined to the bore

housing.

  The bearing for longitudinal movements of the in-

  vention is described in detail in the following description

  two examples of realization represented on the

  in which: FIG. 1 is a longitudinal section following

  C-C of Figure 2 of the bearing for longitudinal movements

  increased load capacity (doubled) mounted in a housing; Figure 2 is a cross section along B-B of Figure 1 of the bearing mounted in a housing Figure 3 is a partial top view of the bearing shown in Figures 1 and 2 (without housing); Figure 4 is a top view of the bearing housing shown in Figures 1, 2 and 3; Figure 5 is a top view of a cage for a bearing corresponding to the bearing shown in Figures 1 to 3 and having the same diameter but a normal load capacity (simple);

  FIG. 6 is a longitudinal section of a wheel

  modified for longitudinal movements of increased load capacity (doubled); Za Figure 7 is a partial top view of the bearing shown in Figure 6; and FIG. 8 is a cross-section along E-E -4-

of the figure 7.

  In FIGS. 1 and 2, reference numeral 1 designates a box

  and mark 2 a bearing for longitudinal movements.

  increased load capacity (doubled) fixed in the cylindrical bore of the housing 1 The bearing 2 surrounds

  the longitudinally movable cylindrical shaft 3, which is

  presented in Figures 1 and 2 in dashed line.

  The bearing 2 comprises a cage 4 in the form of

  the plastic in which are made several

  longitudinal guide slots 5 arranged on its

  turn and cross it radially (Figure 4).

  having an endless line of spherical rolling bodies 6, each guide slot 5 is provided with a return path

  semicircular 7 at each of its two longitudinal ends.

  dinals and a return path 8 bringing together the two

referral minutes 7 -

  The guide slots 5 of the cage 4 are covered on the outside by a support element mounted in the housing

  1 This support element consists of two longitudinal sections

  nular 9 of standard form which are placed directly side by side in the longitudinal direction and are fixed

  on the cylindrical lateral surface 10 of the cage 4.

  The rolling bodies 6-which transmit the load are guided in the longitudinal direction in the slots of

  guiding 5 of the cage 4 and roll between the rolling path

  cylindrical element 11 located in the bore of a section 9 and

  the cylindrical surface of the shaft 3 has each of the two ex-

  trenches of the cage 4, an end ring 12 is mounted

  on the lateral surface 10 of the cage 4 and fixed by means of

  The two end rings 12 are in contact, by their front face 13 directed axially inwards, with the end face facing a section 9 and immobilize them laterally on the cage 4 (FIG. Figure 3). It can be seen in FIG. 4 that the cage 4 consists of two half-cages 14, 15 divided in a transverse plane.

  B-B These two half-cages 14, 15 are assembled by welding

  ultrasound at their joint in the transverse plane.

  BB In this case, the transverse plane BB passes through the middle of the section 9 which is mounted in the longitudinal end of the cage 4 to the left in Figure 1. The cage 4 consists of a half-cage close 14 and a wide half-cage 15, so that it has a relatively large axial width The sections 9 placed side by side

  side of the bearing 2 have a large load-bearing width

  A (Figure 1), so that the bearing 2 has a capacity of

  charge city double that of a rolling

only one section 9.

  To manufacture a bearing (not shown) of the same diameter as the bearing 2, but of normal load capacity (simple), it slides axially a single section 9

  on a relatively narrow cage 16 (Figure 5) and it is im-

  mobilizes in the middle between the end rings 12 La

  width of the left half-cage 14 shown in FIG.

  re 5 is exactly the same as that of the right half-cage

  The two half-cages 14, 17 are welded to their joint situated in the transverse plane B-B, which passes through the

  mid-point of the normal load carrying capacity.

  in this rolling bearing 6 and end rings 12 of the same dimensions as for the bearing 2 of increased load capacity shown in

Figures 1, 2 and 3.

  In FIGS. 6, 7 and 8 is shown a roller

  A modified modified load carrying capacity 18 which is similarly formed to the bearing 2 shown in FIGS. 1, 2 and 3, but has a sleeve-shaped cage

  19 in one piece (not welded).

  The cage 19 is fixed in the bore of a housing (not shown) and surrounds the shaft 3 (shown in phantom in Figures -6 and 8).

  longitudinal guide slots 5 arranged on its

  which are equipped with a semi-circular

  -6- laire 7 at each of their two ends and a path

  back 8 with a circular section bringing together the two

  7 In each guiding slot 5 are guiding

  dice in the longitudinal direction the spherical rolling bodies 6 transmitting the load of an endless line of rolling bodies 6 placed directly behind each other. Each guide slot 5 is covered on the outside

  two standard shaped sections which are placed directly

  side by side in the longitudinal direction and which,

  in this case, are longitudinal plates 20.

  These plates 20 are mounted side by side by axial sliding in the cage 19 and immobilized radially in the manner of a groove and tongue assembly in the stepped guide 5 of the cage 19 (see section 21).

  plates 20 in Figures 7 and 8).

  The examples of embodiment of the present invention described above may be modified. For example, the sleeve-shaped cage may have, instead of several

  guide slots, a single guide slot through it

  radially and covered externally by one or more

  section (s) placed directly side by side and

  puyé (s) in the housing bore.

  In addition, it is not necessary that the guide slot of the cage is provided with a semicircular return path at each of these two ends and a

  return path joining the two paths of reference.

  If only small axial back and forth movements between the shaft and the housing occur in service, it may be limited, so that the load-bearing rolling bodies can only roll to the end.

  length of each guide slot

  the load-transmitting lugs must then, depending on the amplitude of the back-and-forth

  a sufficient axial clearance at the ends of the guide slot

  A flexible compression spring

2541394-

  7 - in the longitudinal direction, Can possibly be mounted in the cage between each end of the slot of

  guiding and the rolling bodies transmitting the load.

-8--

Claims (5)

  1. Bearing for longitudinal movements on a shaft, consisting of a cage surrounding the shaft and having at least one longitudinal guide slot for the rolling bodies mounted in line, a bearing element covering the outside or the guiding slot (s) and supported in the bore of a housing, of rolling bodies transmitting the   load, rolling between long running tracks   gitudinalement of the support element and the shaft, and an end ring fixed to each of the two ends of the cage and laterally immobilizing the bearing element on the   cage, characterized in that the support element, for the   the bearing capacity of the bearing (2, 18) of the same diameter shall consist of one or more   section (s) (9, 20) of standard form placed directly   side by side in the longitudinal direction and which,   in the case of a standard form of rolling bodies (6) and   corresponding ends (12) are mounted on a   cage (4, 19) of corresponding width.   2 Bearing according to claim 1, characterized in that the cage (4, 19) is composed of two half-cages   (14, 15, 17) whose separation is in a transverse plane.   sal (B-B, D-D) and which are assembled by welding or   a process similar to their joint located in this trans- versal.   3. Bearing according to claim 2, characterized in that the transverse plane (B-B, D-D) of the joint of the two half-cages (14, 15, 17) passes through the middle of a section.   (9, 20) mounted on one of the two ends of the cage (4).   Bearing according to one of the preceding claims   characterized in that the one or more sections (9) are annular and fixed on a lateral surface (10) of the cage (4).   5. Bearing according to any one of the claims   1 to 3, characterized in that the section (s) are longitudinal plates (20) and are mounted in   the guide slot (s) (5) of the cage (19).   the guide slot (s) (5) of the cage (1 9)