DE10112737C1 - Cage for roller bearing has half-rings engaging positively at tongue-shaped ends - Google Patents

Abstract

The cage has a shell and a cover ring. The base ring (5) carries the shell and is in the form of two half-rings (7). These have tongue-shaped end sectors (8) which engage positively with each other, leaving separating slots (6) of curved configuration with radial projections (9) and corresponding recesses (10).

Description

The invention relates to a cage for roller bearings according to the features in Preamble of claim 1.

Basically, cages for roller bearings can be made in one piece. It in practice, however, there are cases of use that require the cages to be divided into two halves of the ring. It is known in the prior art First, axial grooves on the radially outer sides of the cage and then insert the cage through a radial cut to be divided into two ring halves in the bottom of the groove. Around the ring halves at the To connect assembly to each other, the separating slot will be bridging Placed in the axial grooves and through holes in the groove base screwed to the ends of the ring halves. The tiles bridge the separation slot on the outer circumference of the cage. To the inner circumference of the The separating slot remains open in the cage. It is for the sake of Cylindricalness of the cage is not possible due to the size of the separating slot use shortened platelets to keep the ends of the ring halves as tight  to connect with each other so that the width of the separation slot is minimal. In the known arrangement, an interfering separating slot remains certain width on the inner circumference of the cage. In addition to the elevated Assembly-related expenditure in terms of manufacturing technology is also involved technical effort to connect the ring halves is not negligible.

The prior art is different for other applications configured separation slots known. GB 1,563,935 discloses one Bearing cage for roller bearings, which consists of a finger sleeve and the ends of the Bearing finger encircling circlip exists. The ends of the siche ring rings are circumferentially guided by a sawtooth Cut hooked together. JP 54-160943 A2 proposes to divide a bearing cage for roller bearings completely into two ring halves, the ring halves via a hook-shaped snap connection mesh. The disadvantage here is that for the hook-shaped Interlock when merging a sufficiently wide separation cut must be provided. A wide separation slit on the inner circumference of the However, roller bearing cage is not advantageous. It also complicates hook-shaped mesh the disassembly.

The object of the invention is based on the prior art to create a cage for roller bearings, which is opposite the known embodiment is easier to manufacture on the one hand and others can be assembled and disassembled in less time can.

To achieve this object, the invention proposes according to claim 1 before that the ring halves with tongue-like end sections form-fitting interlock, the separating slots in a curved configuration tion with radially directed projections and counter-trained Recordings from the inner circumference to the outer circumference of the base ring stretch. Each end section has at least one radial  Projection and at least one radial receptacle, which by an im essentially rectilinear, extending in the circumferential direction Transitional section are interconnected.

The essence of the invention is that due to the special curvilinear Configuration of the separation slots formed tongue-like end portions are. This form-fitting design of the end sections with radial directed projections and counter-trained receptacles allows the ring halves to be axially together in the simplest case are available. This makes it easy to assemble the cage.

Since there are no longer any axial grooves with corresponding bores in the Base ring need to be introduced and required for assembly Lichen platelets are also eliminated, the manufacturing outlay at solution according to the invention reduced.

The respective projection is expediently located on the outer one End of the tongue-like end section. Through the form-fitting Interlocking of the halves of the ring corresponds to this positioning recesses at the foot of the tongue-like end section.

Both the end sections and the base ring as a whole have one spring stiffness depending on the choice of geometry and material, which enables the end sections to spring open. This springing allowed with a corresponding configuration of the separating slots, a radial combination guide the ring halves. This allows the ring halves to be together be clipped. The positive locking of the end sections and the spring stiffness The halves of the ring hold together securely.

Such a clipping of the ring halves is considerable with one less assembly effort than the assembly of the stand the cages for roller bearings known in the art. Also one if necessary  Disassembly of the cages is quick and easy on site executable.

According to the features of claim 2, the separation slots are through a spark-erosive cutting process, in particular wire rowing, turned on introduced. This cutting process can be used to cut extremely narrow slits generated that can be in a range around 0.25 mm. release slot widths of 0.1 mm are possible. These narrow dividing slots are in the merged cage halves by the rough Fit the roller body relative to the bearing fingers of the cage out equal without additional connecting means for coupling the Ring halves are absolutely necessary.

The ring halves are clipped together in the design according to Patentan saying 3 particularly easy to carry out, because separation slots, at least sectionally have a rounded contour, a sliding Allow the ring halves to be brought together.

Of course, the separating slots can also be made at least in sections have an angular contour (claim 4). An angular one Contouring has the advantage that the end sections are stronger together are interlocked. The connection of the ring halves is thereby even more secure. ever after which requirements have to be met in practice also combined square and round contours of the separating slots conceivable. Multiple undercuts through multiple recordings and Projections can help to further the positive connection to secure.

In addition, the end sections can be joined together by a radial pin be connected (claim 5). This mortise the positive Connection provides an additional backup of the interlocking End sections represent a separation of the ring halves even when overcoming to prevent the spring forces.

The invention is based on one in the drawings schematically illustrated embodiment explained in more detail. Show it:

Fig. 1 is a cage for roller bearings in perspective view

Fig. 2 in an enlarged view the detail II of FIG. 1 in the axial direction.

Fig. 1 shows a cage 1 for a roller bearing, which consists of a two-part finger sleeve 2 and a cover ring 3 . To accommodate the rolling elements (not shown in detail), a plurality of bearing fingers 4 adapted to the rolling elements extend in the axial direction between an end-side base ring 5 of the finger sleeve 2 and the cover ring 3 . The bearing fingers 4 are only shown in simplified form. While the bearing fingers 4 are formed in one piece with the base ring 5 , the cover ring 3 is screwed to the front ends of the bearing fingers 4 facing away from the base ring 5 .

The finger sleeve 2 is divided into two ring halves 7 by diametrical separation slots 6 . The separating slots 6 extend from the inner circumference 11 to the outer circumference 12 of the base ring 5 in a curved configuration. They are preferably introduced by a spark-erosive cutting process, in particular by wire rudder. Due to the special contouring of the separating slots 6 , the ring halves 7 can be assembled both axially and radially.

The contouring of a separating slot 6 is clear in the illustration in FIG. 2. When the separating slot 6 is introduced into the base ring 5 , two corresponding end sections 8 are simultaneously produced, which engage in one another in a form-fitting manner. In the exemplary embodiment, the separating slot 6 is configured to be essentially S-shaped. The curved configuration results from in each case a radially directed projection 9 at the end of each end section 8 and in each case a counter-trained receptacle 10 . Between the projections 9 and the receptacles 10 , an essentially rectilinear transition section 13 extends in the circumferential direction of the base ring 5 approximately centrally between the inner circumference 11 and the outer circumference 12 . The end sections 8 thus have the same radial thickness D in the region of the transition section 13 .

The separating slot 6 is the intersection point SP of the transition portion 13 and a transition section 13 längenhalbierenden parting plane E configured point-symmetrically with respect to. The separating slot 6 enters the base ring 5 in parallel and at a distance from the separating plane E on the inner circumference 11 . In a first embodiment (solid lines), a first longitudinal section LA1 parallel to the parting plane E is followed by an arcuate longitudinal section LA2, which forms the transition between the parallel longitudinal section LA1 and the transition section 13 running essentially at right angles to the parallel longitudinal section LA1. The arcuate length section LA2 simultaneously forms the radial projection 9 or the radial receptacle 10 .

In a second exemplary embodiment (broken line), the contouring of the separating slot 6 between the parallel longitudinal section LA1 and the transition region 13 is angular. The separating slot 6 runs with the formation of the projections 9 and receptacles 10 essentially parallel to the separating plane E or parallel to the transition region 13 .

In addition to the projections 9 and receptacles 10 , the corresponding end sections 8 can be connected to one another by a radial pin 14 . The radial pin 14 is to be driven in during assembly of the ring halves 7 and, accordingly, removed again during disassembly.

LIST OF REFERENCE NUMBERS

1

Cage

2

finger sleeve

3

bezel

4

bearing finger

5

base ring

6

separating slots

7

Ring halves of

1

8th

End sections of

7

9

radial protrusions

8th

10

radial recordings in

8th

11

Inner circumference of

5

12

Outer circumference of

5

13

Transition section

14

radial pin
D thickness of

8th

E parting plane
LA1 longitude of

6

parallel to E
LA2 arcuate section of

6

SP intersection of

13

and E

Claims (5)

1. cage ( 1 ) for roller bearings, which consists of a finger sleeve ( 2 ) and a cover ring ( 3 ) and in which at least the bearing finger ( 4 ) of the finger sleeve ( 2 ) bearing base ring ( 5 ) through two separating slots ( 6 ) in Ring halves ( 7 ) is divided, the mutually adjacent end sections ( 8 ) of the ring halves ( 7 ) being releasably connected to one another, characterized in that the ring halves ( 7 ) with positive end sections ( 8 ) engage in one another in a positive manner, the separating slots ( 6 ) extend in a curved configuration with radially directed projections ( 9 ) and counter-shaped receptacles ( 10 ) from the inner circumference ( 11 ) to the outer circumference ( 12 ) of the base ring ( 5 ), each end section ( 8 ) having at least one radial projection ( 9 ) and has at least one radial receptacle ( 10 ) which is joined together by an essentially rectilinear transition section ( 13 ) extending in the circumferential direction r are connected. 2. Cage according to claim 1, characterized in that the separating slots ( 6 ) are introduced by a spark-erosive cutting method, in particular wire rowing. 3. Cage according to claim 1 or 2, characterized in that the separating slots ( 6 ) have a rounded contour guide at least in sections. 4. Cage according to one of claims 1 to 3, characterized in that the separating slots ( 6 ) at least in sections has an angular contour. 5. Cage according to one of claims 1 to 4, characterized in that the end portions ( 8 ) are connected to one another by a radial pin ( 14 ).