DE102006044271A1 - Disc cage and barrel bearing with disc cage - Google Patents

Abstract

Cages for rolling bearings serve to guide the rolling elements between an inner ring and an outer ring to each other without contact. Depending on the field of application, the cages can have a wide variety of shapes; for example, sheet metal cages or solid cages made of sheet steel, brass or else plastic are known, which surround the rolling elements at least in sections. It is proposed a disc cage 5 for a rolling bearing 1 with recesses 11 for receiving rolling elements 4 and at least one disc cage 5 in the radial direction separating, closable parting line 13, wherein end portions 14, 15 are provided at the free ends of the disc cage, the the parting line 13 by a relative movement of the end portions 14, 15 in the axial direction 6 are positively connected to one another in a final assembled state.

Description

The The invention relates to a disc cage for a rolling bearing with recesses for Recording of rolling elements and with at least one separating the disc cage in the radial direction, lockable Parting line, as well as a barrel bearing.

Cages for rolling bearings serve the rolling elements between an inner ring and an outer ring to each other without contact respectively. The cages can ever have the most diverse forms according to application, for example are sheet metal cages or solid cages made of sheet steel, brass or plastic known to be the rolling elements at least engage in sections.

A Special form of cages refer to the so-called disc cages, which in the coarse form as annular discs are formed.

The publication DE 663 179 discloses, for example, a self-adjusting spherical roller bearing with a disc cage, which is formed as a flat sheet metal part and has a central free passage opening for receiving an inner ring of the bearing and in the peripheral region a plurality of azimuthally regularly arranged recesses. The rollers of the bearing each show a waisted area, so that the rollers are inserted into the recesses of the disc cages.

The publication DE 102 55 992 A1 relates to a further development of the described spherical roller bearing, which is designed as a roller bearing, wherein the disc cage is realized similar to the spherical roller bearing.

In structurally completely different types of bearings, namely the cylindrical roller bearings, disk cages are also known from the prior art:
For example, the publication shows DE 196 01 044 a cylindrical roller bearing with a disc cage, which - probably due to the lower axial load of this type of bearing - the disc cage is formed as isolated intermediate pieces between the cylindrical rollers.

The publication DE 101 19 894 A1 also relates to a cylindrical roller bearing with a disc cage, wherein it is proposed to simplify the installation, to interrupt the disc cage at least one peripheral point and after assembly of the disc cage the parting line by welding, gluing or closing by means of closure elements, such as interlocking interlocking hooks, again.

The publication DE 100 37 138 C1 , which is regarded as the closest prior art, relates again to a cylindrical roller bearing with a centrally this time in the axial direction guided disc cage. The disc cage is interrupted at at least one circumferential location, wherein after installation, the free end portions of the disc cage at the parting line remaining, for example, by means of a rivet, screw, adhesive joint, welded joint or solder joint, are connected. As a further alternative of the connection, a necking, in particular of the one end of the cage through the other end of the cage, is mentioned, wherein the permanent connection is ensured by a plastic deformation of the ends.

Of the Invention is based on the object from the prior art known rolling bearings in terms of economical production and flexible To further develop the mission.

These The object is achieved by a disc cage with the features of the claim 1 and solved with a barrel bearing with the features of claim 8.

Of the Disc cage according to the invention is for use in a rolling bearing, in particular cylindrical roller, spherical or roller bearings suitable or formed and is preferably made of a metallic material manufactured. In the rough contour of the disc cage is as an annular disc formed, which preferably has the same thickness at each point. The free diameter - too cage bore called - is realized for receiving an inner ring of the bearing. On the Scope of the disc cage are at equal intervals or azimuthally regular recesses or receiving pockets arranged to receive in particular provided with tapered rolling elements are. The recesses can be open radially inward or radially outward. Preferred are the recesses in the axial plan view formed part-circular, in particular, each more than 180 °, in particular more than 190 ° of the pitch circle by the disc cage is enclosed.

Of the disk cage has at least one disk cage in the radial direction and separating lockable Parting on so that the disc cage interrupted at least one circumferential location is. The alignment of the parting line does not have to be strictly radial, but may be any, in particular graduated or contoured course taking.

According to the invention, the disk cage has end sections at the free ends of the disk cage, which can be connected to one another in a form-fitting and end-mounted manner in the axial direction by means of a relative movement of the end sections. Each parting line is associated with two end sections to be joined together. The axial direction designates the direction perpendicular to the planar extent of the disk cage. In particular, it is provided that the end portions are positively connected to one another only with a relative movement. As a result, after the positive connection, the disc cage is in the final assembled state, that is, the disc cage is installed in this state in the rolling bearing. The disc cage can be opened non-destructively in the final assembled state, so that the closure mechanism formed by the end portions is reversible. In particular, in contrast to the known prior art, no additional, losable fastening means or no cohesive joining or forming of the end sections are necessary.

The Invention is based on the consideration, the production costs for the disc cage too reduce by adding extra Work steps by forming, an additional fastener etc. are necessary to be saved. Instead, the free end portions in the region of the parting line by an axially aligned Relative movement form-fitting connected with each other.

at a preferred embodiment is the form-fitting Connection constructively implemented so that when closed disc cage the end sections across from Relative movements in the plane of the planar extension of the disc cage, in particular across from radial and / or tangential relative movements, achieved by the positive connection are secured.

at a possible Constructive concretization of the end sections, these are closed disk cage in an axial plan view of the disc cage to each other occlusion-free arranged. This concretization leads to the advantage that the axial thickness of the disc cage is not enlarged in the area of the closed end sections. Especially it is preferred if the end sections as the axial thickness of the sheet thickness of the disc cage, so the end sections are not made thinner manufacturing-consuming are.

at a manufacturing technology particularly preferred training is the disk cage formed as a stamped part, which manufacturing technology very cheap to produce is. In the case of only one parting line the disc cage is made in one piece. In the case of two joints, the disc cage is formed in two pieces, the Dividing the disc cage preferably symmetrically in half share.

at an advantageous implementation of the disc cage according to the invention has one of the end sections in axial plan view or projection a round or circular outer contour or sections on. The corresponding end portion has one complementary to it trained inner contour on. When closed, the End section with the outer contour encompassed by the end portion with the inner contour and in such a way that one or more undercuts and / or entanglements formed are that of an opening movement in the plane of the plane Extension of the disc cage counteracts.

Especially preferred is an embodiment at the outer contour has an extension similar like an appendage to a puzzle piece, e.g. drops similar is trained.

at a further advantageous embodiment, the recesses the disk cage and arranged the parting line in such a way and / or designed constructively, that in a directly adjacent to the parting line recess used rolling elements as Locking device for the closed parting line acts. In particular, the neighboring blocked Rolling elements the axial relative movement of the end portions necessary for opening the disc cage is.

at a constructive realization of the adjacent rolling elements is so used that the parting line at least partially covered in the radial direction is. Cover in a development of this embodiment both adjacent rolling elements the Parting line in particular such that each of the two adjacent Rolling elements independent of the other rolling element than independent Locking mechanism acts.

The The invention further relates to a barrel bearing which has an inner ring and an outer ring and Has at least one row of barrel-shaped rolling elements, the between the inner ring and the outer ring are arranged and held by a disc cage.

The barrel-shaped Wälzköper wise preferably in the middle of a sidecut, for hanging the Rolling elements in the disc cage is trained. The sidecut is designed as a circumferential groove, wherein the groove width is greater than the simple sheet thickness of the disc cage and preferably smaller as the twice the sheet thickness of the disc cage is selected. Thus, the rolling elements in cross section a dumbbell-shaped Outline, with the barbell body formed in the course to their distal or free ends in particular uniformly tapering are. The barrel bearing is preferably designed for a fixed loose bearing and / or in a range of up to 4 ° angle adjustable.

According to the invention the disc cage one the disc cage in the radial direction separating, closable parting line. The inventors have surprisingly found that disc cages with parting lines not only as known from the prior art at Cylindrical roller bearings, but are also used in spherical bearings, although these absorb larger axial forces due to the angular adjustability have to and accordingly load the disk cage more heavily than the cylindrical roller bearings.

Especially Preferably, the disc cage is formed as described above or laid down in the preceding claims.

in the In general, in the spherical roller bearing of the disc cage inside run or also outside the track. However, the disc cage is particularly preferably roller-guided, wherein the Wälzköper in the built-in or snapped state in the disc cage in axial plan view of this radially inwards and outwards on both sides completely cover up or survive on both sides.

at In a preferred embodiment, the disc cage is centered in the axial direction to the inner or outer ring arranged. Furthermore, it is preferred that the inner ring and / or the outer ring bordenfrei and / or realized in one piece or in one piece. These Training supported Again, the idea of an easy-to-mount and manufacturing technology favorable To propose spherical roller bearings, which is adjustable in angle.

Of the single or multiple split disc cage is particularly advantageous for the Case can be used that the free inner diameter or the cage hole of the disc cage smaller than the maximum Aussendruchmesser the inner ring is formed. In this case, it was only possible to split a split or to use a blasted inner ring, which has a dividing plane perpendicular to the axial direction. The invention now allows the split disk cage on one piece Inner ring is mountable.

Also is the new disc cage advantageous to use in connection with bearing cross-sections, the over-square are formed. The bearing cross-section is defined as the Relationship between the width of the bearing in cross-sectional view parallel to the axial direction and the difference between outer diameter and inner diameter of the camp, also as altitude of the cross section. About Square means in this context that the width of the cross section formed larger is as the height of the cross section. In particular, such bearings with over-square Bearing cross sections are with undivided disc cages and undivided inner rings no longer mountable, as the cage hole smaller than the maximum outer diameter the inner ring is formed. Preference is also the training of the Bearing according to a width row of 3, 4, 5 or 6 according to DIN616.

at An advantageous development of the spherical bearing are the recesses of the disc cage and the parting line arranged and / or designed constructively, that inserted into a recess immediately adjacent to the parting line Rolling elements as Locking device for the closed parting line acts. In particular, the neighboring blocked Rolling elements the axial relative movement of the end portions necessary for opening the disc cage is.

at a constructive realization of the adjacent rolling elements is so used that the parting line at least partially covered in the radial direction is. Cover in a development of this embodiment both adjacent rolling elements the Parting line in particular such that each of the two adjacent Rolling elements independent of the other rolling element than independent Locking mechanism acts.

The Above mentioned advantages are also achievable if instead of a barrel bearing generally a spherical roller bearing, a cylindrical roller bearing or another Bearing is used, or if other series or cross-sectional ratios be used.

Further Advantages, features and effects of the invention will become apparent the following description and attached figures of a preferred embodiment the invention. Showing:

1 a first embodiment of a cylindrical bearing according to the invention in a partially sectioned schematic 3D view obliquely from above;

2 the barrel warehouse in 1 in cross-sectional view in a plane coplanar with the axial orientation of the spherical bearing;

3 a plan view of the disc cage of the spherical bearing in

1 , together with an enlarged detail of the area of the parting line with schematically drawn rolling elements;

4 an enlarged detail of the spherical bearing in 1 in a schematic 3D view with a focus on a parting line of the ticket Benkäfigs in the barrel storage.

each other corresponding parts or sizes are each provided with the same reference numerals in the figures.

The 1 shows in a schematic 3D view obliquely from above a spherical roller bearing 1 which is an inner ring 2 , an outer ring 3 , as well as a row between inner ring 2 and outer ring 3 mounted, barrel-shaped rolling elements 4 having, wherein the Wälzköper 4 in a disc cage 5 hung or snapped.

In the shown barrel bearing 1 it is a winkeleinstellbares bearing, which can be used in particular for the purpose of fixed-floating bearing even with high external loads. For example, it is a bearing of the width series 3 . 4 . 5 or 6 ,

How in particular in conjunction with the 2 that the barrel bearing in 1 in a cross-sectional view in a sectional plane coplanar with the axial extent (arrow 6 ) of the spherical bearing, results, the inner ring 2 an inner raceway 7 and the outer ring 3 one of the inner raceway 7 facing outer raceway 8th on, between which the rolling elements 4 roll. The curvature of the inner raceway 7 or outer career 8th in the in 2 shown cross-sectional plane is formed by means of symmetrical to a plane which is perpendicular and central to the axial extent 6 of the barrel warehouse 1 is arranged.

The inner ring 2 is integrally formed, whereas the outer ring 3 is implemented in this Ausföhrungsbeispiel as a centrally blasted ring, the circulating separation area 9 having. In particular, it should be noted that neither the inner ring 2 still the outer ring 3 Borden or similar lateral boundaries, so that inner ring 2 and outer ring 3 over the rolling elements 4 against each other by up to 4 ° tilted realized.

For structural details of the execution of such barrel bearing is given as an example to the document DE 102 55 992 A1 the applicant, the disclosure of which is fully incorporated by reference.

The rolling elements 4 are rotationally symmetric barrel-shaped and have a central circumferential groove 10 on. As best of the 2 in the cross-sectional representation results are the rolling elements 4 formed in about dumbbell-shaped. The curvature of the contact areas of the rolling elements 4 to the inner raceway 7 or outer career 8th is circular arc, wherein preferably the two dumbbell body, although each have the same radii of curvature, but staggered centers of curvature. The curvature of the inner raceway 7 or outer career 8th is or are preferably also circular arc, in particular, however, the radius of curvature is greater than that selected in the dumbbell bodies.

Returning to the 1 it can be seen that the disc cage 5 axially centered in the barrel bearing 1 is arranged and recesses 11 in which the rolling elements 4 in the area of the groove 10 can be inserted or snapped. From the 2 It can be seen that the inner diameter or the cage hole d is formed smaller than the maximum outer diameter D of the inner ring 2 ,

The 3 shows the disc cage 5 as an item in axial top view. This can be made of a disk with a constant thickness, for example by punching. The disc cage 5 shows in axial plan view of an annular basic structure with a constant radial width, wherein from the radially outer periphery ago the number of rolling elements 4 corresponding number of recesses 11 are cut, each having a rolling element 4 take up. The recesses 11 are distributed equidistantly along the circumference, wherein between the recesses 11 each separating webs 12 are provided.

The recesses 11 in this case have a part-circular contour, which preferably comprises a pitch circle of more than 180 °, so that the rolling elements 4 snapping off the recesses 11 be recorded.

The disc cage 11 is by a respective radially arranged parting line 13 twice interrupted in circumference, so that the disc cage 5 is composed of two parts. It is preferably provided that the two parts of the disc cage 5 are formed identically, so that the production cheapened and confusions are excluded. In particular, the two separation joints 13 arranged diametrically to each other.

The formation of the parting line 13 opens up most clearly from the 4 covering the area of one of the joints 13 in a magnified 3D view. The parting line 13 is in the area of one of the footbridges 12 arranged and is by a male and a female end section 14 respectively. 15 of the disc cage 5 educated. The male end section 14 includes an extension 16 with in axial plan view drop-shaped or teilkreisfömiger contour. For receiving the extension 16 shows the female end section 15 a recess 17 that is complementary to the appendage 16 is formed and prefers this with respect to a tangential Rich tion of the disc cage 5 undercuts. To underline is that the axial thicknesses of the end sections 14 respectively. 15 are the same and the thickness of the other areas of the disc cage 5 correspond. extension 16 and recess 17 are structurally designed so that they are only in the correct position fügbar and only if they are in the axial direction 6 be pushed into each other. Thus, for mounting the two halves of the disc cage 5 around the inner ring 2 placed and with the out of the end sections 14 and 15 In the closed state of the disc cage, the end sections 14 and 15 be separated again only with an axial relative movement, since relative movements in other directions, in particular in directions, in the plane of the flat extent of the disc cage 5 lie gene, by the positive engagement of extension 16 and recess 17 are blocked.

After the rolling elements 4 in the recesses 11 are snapped, which affect the parting line 13 adjacent rolling elements 4 as locking elements for the out of the end sections 14 and 15 formed positive connection. This is achieved by - as seen from the top view in 3 , right side can be seen - the dumbbell body of the adjacent rolling elements 4 the parting line 13 Cover at least partially in axial plan view. After the width of the groove 10 in the rolling elements 4 less than twice the thickness of the disc cage 5 or the end sections 14 . 15 is formed, is an axial relative movement of the end portions 14 . 15 , which leads to the unlocking of the positive connection, no longer possible because the groove walls of the groove 10 Prevent or obstruct this relative movement. It is particularly advantageous if - as in 3 shown - each of the adjacent rolling elements 4 forms an independent locking element. After mounting the serving as locking elements rolling elements 4 can the other rolling elements 4 in a simple and easy to install way into the already secured disc cage 5 be used.

As complementary from the 3 can derive, cover the barbell body of the rolling elements 4 the ring of the disc cage both outwards and inwards, so that the disc cage 5 is guided by a rolling element. Alternatively, an inner race or outer raceway guide of the disc cage 5 Find employment.

Claims (15)

Disc cage ( 5 ) for a rolling bearing ( 1 ) with recesses ( 11 ) for receiving rolling elements ( 4 ) and at least one disc cage ( 5 ) in the radial direction separating, closable parting line ( 13 ), characterized by end sections ( 14 . 15 ) at the free ends of the disc cage, which at the parting line ( 13 ) by a relative movement of the end sections ( 14 . 15 ) in the axial direction ( 6 ) are positively connected with each other in a final assembled state. Disc cage ( 5 ) according to claim 1, characterized in that when the disc cage is closed ( 5 ) the end sections ( 14 . 15 ) are blocked relative to a radial and / or tangential relative movement. Disc cage ( 5 ) according to claim 1 or 2, characterized in that the end sections ( 14 . 15 ) in the axial direction ( 6 ) the same thickness and / or the maximum thickness of the disc cage ( 5 ) exhibit. Disc cage ( 5 ) according to one of the preceding claims, characterized in that the disc cage ( 5 ) in one piece or two pieces, in particular formed as a stamped part. Disc cage ( 5 ) according to one of the preceding claims, characterized in that one of the end sections ( 14 ) in axial plan view a round or circular outer contour ( 16 ) and the other end portion ( 15 ) a complementary thereto formed inner contour ( 17 ), wherein when the disc cage ( 5 ) one end portion ( 14 ) from the other end portion ( 15 ) is encompassed undercutting. Disc cage ( 5 ) according to one of the preceding claims, characterized in that one in one to the parting line ( 13 ) immediately adjacent recess ( 11 ) inserted rolling elements ( 4 ) as a locking member for the closed parting line ( 13 ) acts. Disc cage ( 5 ) according to claim 6, characterized in that in the to the parting line ( 13 ) immediately adjacent recess ( 11 ) used rolling elements ( 4 ) the parting line ( 3 ) At least partially covered in the axial direction. Bearing ( 1 ) with an inner ring ( 2 ), with an outer ring ( 3 ), with at least one row of barrel-shaped rolling elements ( 4 ) between the inner ring ( 2 ) and the outer ring ( 3 ) are arranged, and with at least one disc cage ( 5 ) for receiving the barrel-shaped rolling bodies ( 4 ), characterized in that the disc cage ( 5 ) is formed according to the preamble of claim 1 or according to one of the preceding claims. Bearing ( 1 ) according to claim 8, characterized in that the disc cage ( 5 ) is guided by rolling bodies. Bearing ( 1 ) according to claim 8 or 9, characterized in that the disc cage ( 5 ) in the axial direction of the spherical roller bearing ( 1 ) is arranged centrally. Bearing ( 1 ) according to one of the preceding claims, characterized in that the inner ring ( 2 ) and / or the outer ring ( 3 ) is formed bordenfrei and / or in one piece. Bearing ( 1 ) according to one of the preceding claims, characterized in that the free inner diameter (d) of the closed disc cage ( 5 ) smaller than the outer diameter (D) of the inner ring ( 2 ) is trained. Bearing ( 1 ) according to one of the preceding claims, characterized in that the bearing cross-section of the spherical roller bearing ( 1 ) is formed over square and / or that the barrel bearing of the width series 3 . 4 . 5 or 6 according to DIN616. Bearing ( 1 ) according to one of the preceding claims, characterized in that one in one to the parting line ( 13 ) immediately adjacent recess ( 11 ) inserted rolling elements ( 4 ) as a locking member for the closed parting line ( 13 ) acts. Bearing ( 1 ) according to claim 12, characterized in that in the to the parting line ( 13 ) immediately adjacent recess ( 11 ) used rolling elements ( 4 ) the parting line ( 3 ) At least partially covered in the axial direction.