DE102006040816A1 - Roller bearing for e.g. motor, has rolling body, inner ring and outer ring exhibiting circular magnetization with alternative polarized sections, where rings effect forced rotation of another rolling body during rotation of inner ring - Google Patents

Abstract

The bearing (1) has a rolling body (4) i.e. cylindrical roller, and an inner ring (2) with a bearing surface (11), on which the rolling body with rolling surfaces is rolled. Another rolling body (4`) is provided with circular magnetization with alternative polarized sections (6-9). The inner ring and an outer ring (3) exhibit a corresponding magnetization with circular and alternative polarized sections (13-16). The inner and outer rings effect forced rotation of the rolling body (4`) during rotation of the inner ring.

Description

Field of the invention

The The invention relates to a rolling bearing with several rolling elements and with a rolling bearing ring with a tread, on the the rolling elements with roll off their rolling surfaces.

roller bearing in themselves are in manifold Variations well known as construction elements. With increasing Performance and / or more difficult conditions of use with rolling bearings equipped machines, devices, motors, drives, transmissions etc. increase the demands on performance, Durability, durability and reliability of the bearings used.

The The present invention is particularly apparent against this background addressed the problem of slippage in rolling bearings. The term "slip" is part of the to understand and encompass the present invention in a broad sense any relative movement between the tread of an associated bearing ring on the one hand and the rolling elements (more precisely: the one on the running surface rolling according to the operation Rolling surfaces) on the other hand, which deviates from the (ideal) kinematic - pure - rolling relative motion. Slippage can occur especially with bearings, at least temporarily run with very low load; such situations occur, for example, in wind power transmissions.

to Avoidance of these effects are arranged around the rolling elements, positive-guiding straps or Clamping rings conceivable. Basically, the Rolling elements via gears or gears are driven; For Such a design of the bearings but would be a high-precision manufacturing the gears required, which have a strong cost-increasing effect would. Furthermore would be with considerable noise and to reckon with vibrations.

In front This is the object of the present invention in it, a rolling bearing to provide in which all Rolling elements independent of their present Position and their current load always with kinematic speed - so the the ideal rolling motion corresponding angular velocity - run. But the rest should Performance characteristics and parameters of the rolling bearing, such as e.g. load rating or space, undisturbed or unchanged stay.

These Task is in a rolling bearing of the aforementioned type according to the invention solved in that with the rolling elements a circumferential magnetization with alternating polarized Sections are provided and that the rolling bearing ring has a corresponding Magnetization with circumferentially alternating polarized sections having a forced rotation of the rolling elements during rotation of the rolling bearing ring causes.

Under Magnetization is targeted in the context of the present invention Award of magnetic properties, for example by immediate To understand magnetization of the corresponding material areas.

there can advantageously conventional rolling bearings as standard components used and upgraded or reworked accordingly.

One An essential aspect of the invention is to be seen in that the rolling elements alternately, So with over the extent of periodically changing polarity, are magnetized. This Magnetization corresponding to a magnetization on the inner ring or on the outer ring of the warehouse. The division of the sections is on Circumference of the rolling elements on the one hand and the corresponding division or sectoring of the magnetic Sections of the bearing ring and the associated arc lengths on the other coordinated. Influence parameters are primarily on a rolling body (with acceptable production costs) feasible number of poles and the diameter or arc ratios from rolling elements to the bearing ring.

at the rolling bearing of the invention arise upon rotation e.g. of the co-rotating (magnetized) inner ring by the magnetic attraction forces unequally polarized Sections of bearing ring and rolling elements or equal by the magnetic repulsion forces polarized sections acting on the rolling elements, driving and Slip-preventing drive torques.

One The essential effect of the present invention consists in that the rolling elements have a "magnetic Gearing "with "comb" with the inner or outer bearing ring outside the load zone ideal kinematic conditions or slip-free rolling movements ensured without the associated with a positive interlocking teeth Disadvantages and production costs must be accepted.

Another advantage of the invention is that rolling elements and bearing ring are not absolutely rigidly moved relative to each other despite strong coupling, since - despite the term used in the figurative sense "magnetic teeth" - is not a form-locking teeth in the classical manner if necessary a compensation possible, for example, if in special situations, the required translation of the - dictated by the division of the magnetized sections - differs constructive translation. In that regard, the rolling bearing according to the invention (if necessary) also has the function of a slip clutch between bearing ring and rolling elements.

To an advantageous embodiment of the invention, the rolling elements are cylindrical rollers and the rolling bearing thus a cylindrical roller bearing. Commercially available cylindrical roller bearings are special without much effort easily modifiable to implement the present invention, i.e. their invention relevant components, namely the cylindrical rollers (rolling elements) and the bearing ring, simply magnetizable.

For simple use cases or with suitable materials of the rolling bearing, the e.g. from conventional Bearing steel, such as. 100Cr6, existing components magnetized directly become. If this is not desired in terms of manufacturing technology or possible is or a particularly high quality magnetization or a particularly fine division of the magnetised sections (segments) required is, provides a further advantageous embodiment of the invention ago, that the magnetization of the rolling elements by magnetic rings from a across from the rolling element material different material is realized. These magnetic rings exist preferably made of particularly good magnetizable material, such. Neodymium.

there can particularly preferably the rolling elements at both ends with axial extensions be provided, which is the rolling body side Have magnetization.

In appropriate consideration and use of the advantages mentioned may be particularly preferred roller bearing ring have at least one separate magnetic ring, in which the corresponding Magnetization is realized.

To a further embodiment of the invention are the magnetization of the rolling bearing ring outside the tread and the magnetizations of the rolling elements outside their rolling surfaces. Especially advantageous in such an arrangement, the magnetically active Areas outside the Career that any stray (magnetic) particles are not in the effective range between rolling elements and tread to be brought.

The Invention will be described below with reference to the drawings Embodiments explained in more detail. It demonstrate:

1 schematically a first inventive rolling bearing in cross section and

2 in longitudinal section another inventive rolling bearing.

1 shows a rolling bearing 1 , which as components in a conventional manner an inner ring 2 , an outer ring 3 and interposed rolling elements 4 includes. The bearing is a cylindrical roller bearing; the rolling elements 4 are accordingly designed as cylindrical rollers.

As with only one rolling element 4 ' illustrated by way of example, each rolling element has several sections (sectors) 6 . 7 . 8th . 9 different magnetic polarity. The sectors 7 and 9 are "south magnetic poles" (S) and the sectors 6 and 8th "Magnetic north poles" (N) 10 of the rolling element 4 ' effective magnetic sections 6 . 7 . 8th . 9 So are with respect to the lateral surface 10 circumferentially and in their magnetic polarity alternately formed (N) - (S) - (N) - (S).

The inner ring 2 has corresponding, over its entire outside, the tread 11 for the rolling elements forming shell or peripheral surface distributed in the same pitch arranged magnetized sections or sectors, of which, for example, only in the vicinity of the current position of the rolling element 4 ' located sections 13 . 14 . 15 . 16 are shown. The sectors 13 and 15 are "south magnetic poles" (S) and the sectors 14 and 16 "Magnetic north poles" (N) .The on the tread 11 of the inner ring 2 effective magnetic sections 13 . 14 . 15 . 16 are thus formed circumferentially and in their magnetic polarity alternately (S) - (N) - (S) - (N).

The effect of the rolling bearing according to the invention is based on the following principle: each unequal magnetic poles tend to attract or same poles are prone to rejection. That's why the sector is oriented 8th (S) to the corresponding, opposite sector 14 (N) of the inner ring and the sector 9 (N) to the sector 15 unequal polarity (S). Upon rotation of the - connected, for example, with a shaft, not shown - inner ring 2 around the axis of rotation 22 in the direction of the arrow 24 and mechanical load in the vertical direction V, arises due to the magnetic interactions of the sections 6 . 7 . 8th . 9 with the sections 13 . 14 . 15 . 16 one on the rolling element 4 ' acting drive torque in the direction of the arrow 25 , So although the rolling element 4 ' is substantially load-free in this situation, is still by its magnetic coupling with the inner ring 2 ensures an inevitable rotational movement. This is due to the dimensioning of the section arc lengths (eg 27 ) of the rolling element 4 ' and the corresponding arc length (eg 28 ) on the tread 11 set so that the rolling elements without slip against the inner ring 2 or on its tread 11 ge moves or rolls according to the (ideal) kinematic rolling movement.

In this case, in further rotation of the inner ring, the next following sections 13 (S) and 6 (N) in operative position and set the above-described rotational movement of the rolling element 4 ' continued.

Of course, instead of or in addition to the inner ring 2 also the outer ring 3 be magnetized accordingly.

The described bearings can be a conventional, be a series-produced bearing, in which only as previously described magnetically cooperating components (after) are treated. Depending on required magnetization strength can do it particularly advantageous bearing made of conventional bearing steel, e.g. 100Cr6, to be used.

Lie particularly demanding magnetization prerequisites or conditions of use, the magnetization can advantageously be in a separate, with connected to the bearing ring or rolling elements Component of other, magnetization optimized material, such as. Neodymium, be provided.

2 shows such a conceivable modification of a rolling bearing, in which the magnetizations outside the actually coalescing during the rolling process surfaces - namely the tread 30 an inner bearing ring 32 and the rolling surface 35 a rolling element 36 - are located. In this example, the rolling elements 36 designed as a pin rolling body with lateral axial extensions 38 . 39 in the form of molded pins or axially made needles.

On the pins are sector-wise magnetized rings 42 . 43 applied and fixed there eg by press fit or gluing. The inner ring 32 has lateral rims 45 . 46 on, on each of which a circumferential ring 47 . 48 is applied. The Rings 47 . 48 are magnetized to sectors or sections with alternating polarity. Only schematically and by way of example lies in the current position of the south pole S of the ring 47 the north pole N of the ring 42 across from. Accordingly, the south pole S of the ring 43 and the north pole N of the ring 48 at. Upon further rotation of the inner ring 32 come as related to the 1 described in principle, the subsequent respective sectors of the opposite polarity in effect proximity and cause a further slip-free rotation of the rolling body 36 ,

The arc lengths of the sections of the rings 47 . 48 are according to the arc lengths of the sections of the rings 42 . 43 so dimensioned that here too the slip-free "gearing" described above is ensured.

Alternatively or additionally, correspondingly sized rings on the sides or corresponding rims of the outer ring could 50 be provided.

Advantageous in the variant 2 is that the magnetically active areas of the rings 42 . 43 respectively. 47 . 48 located outside the actual effective and supporting area of the bearing. Thus, these can no foreign or dirt particles in the area of the active surfaces, namely the tread 30 and the rolling surfaces 35 to promote.

V

direction

1

roller bearing

2

inner ring

3

outer ring

4

rolling elements

4 '

rolling elements

6 7, 8, 9

sections

10

lateral surface

11

tread

13 14, 15, 16

sections

22

axis of rotation

24

arrow

25

arrow

27

Section arc length

28

arc length

30

tread

32

internal bearing ring

35

rolling surface

36

rolling elements

38 39

Renewals

42 43

magnetized rings

45, 46

Borde

47 48

surrounding ring

50

outer ring

Claims (6)

Roller bearing ( 1 ) - with several rolling elements ( 4 ) and - with a rolling bearing ring ( 2 ) with a tread ( 11 ), on which the rolling elements ( 4 ) with their rolling surfaces ( 10 ), characterized in that - the rolling elements ( 4 ' ) with a circulating magnetization with alternating polarized sections ( 6 . 7 . 8th . 9 ) and - at least one rolling bearing ring ( 2 . 3 ) a corresponding magnetization with circumferentially alternating polarized sections ( 13 . 14 . 15 . 16 ), which is a forced rotation of the rolling elements ( 4 ' ) upon rotation of the rolling bearing ring ( 2 ) causes. Rolling bearing according to claim 1, characterized in that - the rolling elements ( 4 ) Cylindrical rollers are. Rolling bearing according to claim 1 or 2, characterized in that - the magnetization of the rolling elements ( 36 ) by magnetic rings ( 42 . 43 ) is realized from a different material to the Wälzkörpermaterial. Rolling bearing according to claim 1, 2 or 3, characterized in that - the rolling elements ( 36 ) at both ends axial extensions ( 38 . 39 ), which have the rolling body-side magnetization. Rolling bearing according to at least one of the preceding claims, characterized in that - the rolling bearing ring ( 32 ) at least one separate magnetic ring ( 47 . 48 ), in which the corresponding magnetization is realized. Rolling bearing according to at least one of the preceding claims, characterized in that - the magnetization of the rolling bearing ring ( 32 ) outside the tread ( 30 ) and - the magnetizations of the rolling elements ( 36 ) outside their rolling surfaces ( 35 ) are located.