DE102015204067A1 - Cage of a rolling bearing - Google Patents

Abstract

It is given a roller holder 10, which allows a damage-free introduction of rolling elements 4, the raceway 2 of a bearing ring 1 and a secure holding introduced into the raceway 2 rolling elements 4. For this purpose, a cage 5 is provided, in the webs 7 and / or rings 6 radial holes 9 are introduced. After mounting the rolling elements 4 in the raceway 3 of the respective bearing ring 1 provided with pins 11 roller holder 10 is fixed in the holes 9, wherein the heads 12 of the roller holder 10 connected to the cage 5 state in the clear distance A between two adjacent webs 7 engage and secure the assembled rolling elements 4 there.

Description

Technical area

The invention is concerned with the formation of cages intended to guide rolling elements in rolling bearings, in particular with the securing of rolling elements introduced into the cages on a bearing ring of a roller bearing.

Generally cages made of sheet steel are made so that from a metal strip pockets that later lead the rolling elements of a rolling bearing between the two bearing rings of this bearing, are punched out and then this pretreated sheet metal strip is bent into a circle and the respective ends of the metal strip are connected together , It is also possible to produce a cage made of sheet steel connectionless by corresponding pockets are introduced into a tubular body in the circumferential direction of this body.

In addition to the cages made of sheet steel so-called Massig cages are known, the contours and pockets are formed milled.

Regardless of the type of production cages of bearings have two, axially spaced rings and a plurality of webs extending between the two rings, which maintain a mutual distance in the circumferential direction of the cage and which together with the rings, the pockets for the Provide rolling elements.

Rolling bearings are to be manufactured using cages, it is customary to provide the webs with integrally molded retaining lugs. These retaining lugs have the sole purpose of securing the rolling elements against falling out when they are introduced into the raceway of one of the bearing rings of the rolling bearing during assembly of the rolling bearing. If, for example, a rolling bearing is to be constructed whose one bearing ring is provided with two ribs, a secured against falling mounting of the rolling elements in this bearing ring can only take place when the cage is arranged coaxially to this bearing ring and the respective rolling elements against the retaining lugs provided on the cage are pressed so that under the forces acting on the rolling elements, the retaining lugs yield elastically and snap the rolling elements in the raceway of this bearing ring.

As can easily be seen, the frictional contact between and the retaining lugs on the cage and the Wälzkörpermantelfläche the snapping of the rolling elements can cause damage to the surface of einzchnappenden rolling elements, which can shorten the life of such a bearing result. It is also common that roller bearings are delivered partially assembled to the customer, especially in the form of tapered roller bearings. Under partially mounted bearings such bearings are understood in which the customer receives a provided with the roller set and the cage bearing ring and a corresponding additional bearing ring. This separate shipping of bearing rings can have advantages in the mounting of the bearing by the customer. If, however, partially assembled bearings are delivered to customers, it must be ensured that the retaining lugs hold the rolling elements in the cage or roller set, cage and bearing ring assembly throughout the transport and assembly chain.

On the one hand to keep damage to the rolling elements surfaces when snapping into the track low, but still to ensure a permanent securing of the rolling elements in the pockets of the cage, a compromise is chosen, which - as the experiences of the Applicant have shown - is often not suitable to adequately satisfy both conflicting effects.

Presentation of the invention

The invention is therefore an object of the invention to provide a cage that allows a damage-free installation of rolling elements in the raceways of bearings and at the same time holds the mounted on the raceway rolling there safe and durable.

This object is achieved with the features specified in claim 1. Advantageous embodiments and further developments of the invention are the claims 2 to 6 can be removed. A method for producing a unit of cage, rolling elements and a bearing ring of a roller bearing is specified in claim 7.

Are the webs and / or rings of the cage provided with bores extending radially, and are positively inserted into the bores pins of roll holders, wherein the opposite ends of the pin roller holders in the cage connected state in the clearance A protrude between two, in the circumferential direction of the cage adjacent webs, the rolling elements can be mounted on the respective bearing ring without obstruction by the cage in the raceway of the bearing, since the assembly of the projecting into the clearance A and the rolling elements securing roller mounts only after the arrangement the rolling element or the rolling element takes place in the raceway, whereby damage to the rolling elements by contact friction during insertion into the raceway is completely excluded. Since damages are excluded by the subsequent mounting of the roller holder damage to the surface of the rolling elements by contact friction, the Ragtiefe the role holders, with which they engage in the clear distance A between two webs, are largely freely chosen, which is a particularly good and sustainable assurance of in the raceway of a bearing ring arranged rolling elements of a rolling bearing leads.

It is advantageous to produce the roll holders made of metal or plastic. In this case, plastic is due to the ease of manufacture and its quasi-excluded influence on the surface of the rolling elements during operation of the bearing of particular importance.

A special simple connection of the roll holders with the cage is given when at least one pin 11 with one, from his free end 13 outgoing and moving in the direction of the tenon 11 opposite end 19 the roll holder 10 extending slot 15 is provided.

A simple pulling out or falling out of the roll holders is then excluded if at least one pin 11 each roll holder 10 at its free end 13 with one, the cross section of the pin 11 enlarging bead 14 is provided. This bead ensures that an abutment is created when the pin has reached its end position in the bore.

A release of the roll holders even under considerable, exerted by the weight of the rolling elements in large bearings load must not be feared if at least one roll holder from the free end of the pin to the opposite end of the pin role holder is traversed by a channel and if im in the Hole of the cage inserted state of the pin of the channel is filled by a use.

Short illustration of the figures

Show it:

1a . 1b a perspective of a unit of cage, rolling elements and bearing ring (cut) and an associated side view;

2 a further training of a unit according to 1 ;

3 a further training of a unit according to 1 ; and

4 a roll holder.

Ways to carry out the invention

The invention will now be described in more detail with reference to FIGS.

In 1a is a bearing inner ring 1 a tapered roller bearing shown. The career 2 this bearing inner ring 1 is made of two, axially spaced Borden 3 limited. The career 2 of the bearing inner ring 1 is almost complete with conical rolling elements 4 filled, of which, however, in the illustration according to 1a only two rolling elements 4 are shown. The rolling elements 4 are from a curb in this case on board 5 led, as well as the bearing inner ring 1 - Is formed in plan view circular ring. This cage 5 , which is made in one piece, comprises two axially spaced rings 6 and a plurality of webs 7 that the two rings 6 connect. Through the interaction of the two rings 6 and two - in the circumferential direction of the cage 5 - Directly spaced webs 7 become bags 8th formed, each having a rolling element 5 take up.

These bridges 7 are in the embodiment according to 1a respectively. 1b with two radial bores 9 Mistake,

Also, in 1a each jetty 7 two role postures 10 made of metal, which maintain an axial distance from each other. As the presentation according to 1a shows is each of the two roll holders 10 with a pin 11 provided, with which the respective roll holder 10 for its attachment in one of the two holes 9 at the jetty 7 is pressed.

The cones 11 opposite ends are with one opposite the pin 11 enlarged and the shape of the rolling elements 4 adjusted head 12 Mistake. Are the roll holders 10 with the jetties 7 connected, the heads protrude 12 the roll holders 10 in the clearance A between two, in the circumferential direction of the cage 5 neighboring bridges 7 into it and enclose one in the bag 8th of the cage 5 inserted rolling elements 4 , The latter is in 1b which shows a side view of a tapered roller bearing and i. above sea level. also makes visible that the projecting into the clear distance A sides of the heads 12 the contours of the rolling elements 4 are adjusted.

If a unit of bearing inner ring 1 and rolling elements 4 according to 1a respectively. 1b are formed, first a bearing inner ring 1 provided. Then the cage with pockets 8th and drilling 9 fitted and coaxial around the bearing inner ring 1 arranged. Subsequently, a rolling element 4 through one in the cage 5 provided bag 8th into the career 2 of the bearing inner ring 1 inserted. Has the rolling element 4 his final position in the career 2 taken, it is from the roll holders 10 fixed in this position by the pins 11 the roll holders 10 into the holes 9 in the jetties 7 be pressed. Because the heads 12 the in 1a and 1b shown roll holders 10 so large that they are in the assembled state in two immediately adjacent pockets 8th of the cage 5 As will be appreciated, the roll holders will 10 only then introduced, if previously two rolling elements 4 into the career 2 have been inserted.

The execution of the roll holder 10 according to 2 differs from the design according to 1a respectively. 1b solely by the fact that there each jetty 7 the rolling elements 4 not two separate, but of a single, but two cones 11 comprehensive roll holder 10 is formed.

In the execution according to 3 are the roll holders 10 in holes 9 used in a ring 6 of the cage 5 are introduced.

In 4 is a roll holder 10 shown enlarged, which the shape of a roll roller holder largely 10 according to 1a respectively. 1b equivalent. Unlike the roll holder 10 according to 1a respectively. 1b is in 4 the roll holder 10 made of plastic. As shown in the illustration 4 can be taken, is the free end 13 of the pin 11 with a bead 14 Mistake. Besides, go from the free end 13 two slots 15 out, moving in the direction of the head 12 extend and extend in the axis of symmetry of the pin 11 divorce. Will such a roll holder 10 with the pin thus formed 11 in the direction of arrow P on a hole 9 (in 4 only shown schematically) are moved through the slots 15 formed tongues 16 on contact with the bore elastically in the direction of the axis of symmetry of the pin 11 weggebogen and facilitate the insertion of the roll holder 10 in bore 9 , Has the roll holder 10 their final position in the hole 9 taken, the tongues spring 16 back, leaving the bead 14 at the the bore 9 surrounding wall 17 applies and a simple pulling out of the roll holder from the bore 9 in derogation.

Should a pulling out of the roll holder 10 from a hole 9 also be excluded under force, it is advantageous to a channel 18 to provide the entire roll holder 10 from the free end 13 until the pin 11 opposite end 19 pervades. Has the roll holder 10 their final position in the hole 9 taken, is in the channel 18 an insert 20 inserted and fixed, which the channel 18 fills in and accidentally springing back the tongues 16 in the direction of the axis of symmetry of the pin 11 excludes.

LIST OF REFERENCE NUMBERS

1

Bearing inner ring

2

career

3

shelf

4

rolling elements

5

Cage

6

ring

7

web

8th

Bags

9

drilling

10

roll holder

11

spigot

12

head

13

free end

14

bead

15

slot

16

tongue

17

wall

18

channel

19

opposite end

20

commitment

Claims (7)

Cage of a rolling bearing with two rings 6 , which are arranged at an axial distance from each other, and with a plurality of webs 7 that is between the two rings 6 extend and which together with the rings 6 Bags 8th for receiving rolling elements 4 provide, characterized in that the webs 7 and / or rings 6 with holes 9 are provided, which extend radially, and that in the holes 9 spigot 11 of roll holders 19 are used positively or non-positively, wherein the pin 11 opposite ends 19 the roll holders 10 im with the cage 5 connected state in the clearance A between two, in the circumferential direction of the cage 5 neighboring bridges 7 protrude. Cage according to claim 1, characterized in that the roll holders 10 made of metal or plastic. Cage according to claim 1 or 2, characterized in that at least one pin 11 with one, from his free end 13 outgoing and moving in the direction of the tenon 11 opposite end 19 the roll holder 10 extending slot 15 is provided. Cage according to claim 3 that at least one pin 11 each roll holder 10 at his free end 13 with one, the cross section of the pin 11 enlarging bead 14 is provided. Cage according to claim 3 or 4, characterized in that the roll holder 10 from the free end 13 of the pin 11 until the pin 11 opposite end 19 the roll holder 10 from a channel 18 is traversed and that in the hole 9 of the cage 5 inserted state of the pin 11 the channel 18 from a mission 20 is filled. Cage according to one of claims 1 to 5, characterized in that the pockets 8th have conical shape. Method for producing a unit from a cage 5 , Bearing ring 1 and Wälzköpern 4 characterized in that in a first step, a cage 5 is made next to bags 8th for receiving rolling elements 4 also radial holes 9 for holding roll holder 10 that then has the cage 5 coaxial with a bearing ring 1 a rolling bearing is arranged and the pockets 8th of the cage 5 with rolling elements 4 be populated and that in a last step in the pockets 8th of the cage 5 inserted rolling elements 4 against falling out against the insertion direction by pins 11 through comprehensive roll mounts 10 be secured by the pins 11 the roll holder 10 positive or non-positive in the holes 9 be introduced.

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