DE202006008982U1 - Rotation blocking device for a rolling bearing with an outer stationary race comprises a rotation blocking ring with a tongue provided with at least one surface in contact with a cutout in the bearing seat - Google Patents

Abstract

The rotation blocking device for a rolling bearing (1) with an outer stationary race (3) comprises a rotation blocking ring (10) with a tongue (12) provided with at least one surface in contact with a cutout in the bearing seat. Independent claims are also included for: (A) a bearing unit with the proposed rotation blocking device; (B) a machine with such a bearing unit.

Description

The The present invention relates to the field of devices which serve to prevent a possible rotation of a stationary Rings of a rolling bearing across from to limit its seat. Such devices are generally referred to as Rotation blocking or anti-skid devices are called and become especially for used the rolling bearings used in alternators.

at This type of application is in a housing in the interior of a Stator is mounted, an anchor by means of two bearings rotatably mounted, too which include: a surrounding inner ring, a stationary outer ring and a wreath of between the rings arranged rolling elements. The Inner rings of each of the rolling bearings are rigidly mounted on a seat of the anchor, with the outer rings mounted in a seat provided for this purpose of the housing are.

Of the outer ring one of the rolling bearings is generally by means of a sliding fit in its bearing seat attached to a slight axial displacement of the ring relative to the To allow bearing seat. This adjustment allows on the one hand the exercise an axial biasing force on the rolling bearing by means of in axial Direction of elastic discs and on the other hand the compensation eventual axial dimensional deviations of the seat due to temperature fluctuations are attributed.

in the Generally, the outer rings the rolling bearing and their seats made of different materials, for example made of a steel and a light metal alloy, e.g. an aluminum alloy. Due to the different extent of these two materials, may change between the outer ring a rolling bearing and its seat provided fit, resulting in insufficient radial Attachment between these two elements and even a light one Radial play can cause.

The internal frictional torque of the rolling bearing, in particular the viscosity of the lubricant used for the rolling bearing or due to frictional forces generated by seals of the bearing, in combination with the reduction of the clamping force or with the easy play between the bearings and the seat, a sliding of the outer ring in the circumferential direction in bring his seat and in this way the proper function of the alternator affect. It is therefore necessary to create facilities that serve a possible rotation of the outer ring with respect to its Limit seat.

For this purpose is from the US 5,785,433 a rotation lock ring for a rolling bearing ring, which is open at one point of its circumference and in the radial direction by curved inner and outer surfaces is limited, which are eccentric to each other. The ring has a plurality of elastically deformable sections.

Of the Ring sits in the interior of a groove on a cylindrical Outer peripheral surface of outer ring of the rolling bearing is arranged, wherein the groove with respect to the geometric axis of the Ring is provided eccentric bottom. During installation of the rolling bearing in the bearing seat, enter the elastically deformable sections, the opposite the cylindrical outer peripheral surface of outer ring project in the radial direction, in contact with the position of the seat.

in the Operation, the ring remains during one opposite running the bearing seat Rotation of the outer ring of the rolling bearing due to a frictional contact between the deformable sections and the seat in the groove immovable what a clamping between the outer ring, causes the ring and the seat, causing a movement of the outer ring across from the bearing seat is limited accordingly in the circumferential direction.

A Such ring is disadvantageous because it has a variety of elastic deformable sections during installation of the rolling bearing to restrain in the interior of the seat are what the step of mounting the rolling bearing in its bearing seat more difficult and moreover there is a risk that parts of the deformable sections of the ring, if made of plastic is what possibly associated with the risk of contamination.

Furthermore the ring has a relatively complex Shape up, which may be expensive is.

The The present invention therefore aims to overcome these disadvantages, by a rolling bearing rotation locking device it is proposed that reliable and cost-effective is, and allows a comfortable assembly of the rolling bearing.

To This purpose is a rotation locking device for rolling bearings of the type, a rotating ring, a stationary one Ring, which is arranged with a circumferential on a cylindrical surface Groove is formed, and a series of between bearing surfaces of the Rings arranged rolling elements contains, wherein the bottom of the groove opposite The axis of the stationary ring is eccentric.

The Device contains a rotation lock ring adapted to be in the groove fixed and in the radial direction by coaxial inner and outer cylindrical surfaces to be limited. The ring also contains at least one radial projection, which forms a tongue adapted to be in a recess to be arranged, which is formed in a seat, in whose Inside the resting ring is attached, leaving the tongue at least one in contact with the recess standing area has to while an angle change of the resting ring opposite the Seat to exert a radial force on the recess.

A such device has the advantage that it has a tongue, which is mounted in a recess that is shaped appropriately, around the fixing of the stationary ring in the circumferential direction relative to the Ensure seat in a particularly accurate and safe manner.

Furthermore disturbs the Tongue while the installation of the rolling bearing in the associated Bearing seat not because such a recess is present what the assembly of the machine, inside which the rolling bearing is to attach, much simpler and their reliability elevated.

Furthermore allows it is the basic structure of a radially limited by coaxial inner and outer surfaces Rings, a particularly cost-effective To create a facility.

Preferably the radial thickness of the ring is adjusted so that the cylindrical one Outer peripheral surface of Rings in an area that fits in the radial direction between a bottom of the groove and the cylindrical surface of the stationary ring is limited when the tongue over centered on the deepest part of the groove.

A such arrangement allows in this way a possibly occurring radial engagement of the Rings with the seat during the installation of the rolling bearing to limit the interior of the seat.

advantageously, the radial thickness of the ring is substantially less than the depth the groove.

Of the Ring can over be open a portion of its circumference and / or in the circumferential direction between 180 ° and Extend 360 °.

Preferably the ring has a substantially constant axial dimension.

Of the Ring can advantageously be made of a molded plastic be.

Of the Ring may have a single tongue to a particularly cost-effective device receive.

advantageously, Both the tongue and the ring are made in one piece, making the manufacturing a uniform assembly that allows itself without the danger an inadvertent separation of these particularly sensitive elements handle and transport.

The The invention further relates to a bearing assembly which includes: a encircling ring, a resting ring with one on a cylindrical one area trained circumferential groove, the bottom of the groove opposite to the Axis of the stationary ring is eccentric, a wreath of between Raceways the rings arranged rolling elements and a rotary lock ring mounted in the groove.

Of the Ring is in the radial direction through coaxial inner and outer cylindrical surfaces limited and also points at least one radial projection forming a tongue, which is adapted to be mounted inside a recess which is formed in a seat into which the resting Ring is inserted, wherein the tongue has at least one surface, in touch with the recess stands to while an angle change opposite the resting ring the seat on the recess to exert a radial force.

The The invention further relates to a machine having a fixed one Part, a sliding part and at least one bearing assembly, which is mounted between the parts, and which includes: a encircling ring, a resting ring with one on a cylindrical one area trained circumferential groove, the bottom of the groove opposite to the Axis of the stationary ring is eccentric, a wreath of between Raceways the rings arranged rolling elements and a rotary lock ring mounted in the groove.

Of the Ring is in the radial direction through coaxial inner and outer cylindrical surfaces limited, the ring also has at least one radial projection forming a tongue, which sits in a recess in a seat of the fixed Part is formed, in the interior of the stationary ring is inserted, wherein the tongue has at least one surface, which is in contact with the recess stands to stand on the recess during an angle change opposite the resting ring to exert a radial force on the seat.

The present invention will become more apparent after reading the detailed description of exemplary embodiments, which are in no way to be considered restrictive and are illustrated by the following drawings. Show it:

1 to 3 perspective views of a rolling bearing having a rotation locking device according to an aspect of the invention;

4 a schematic view of the rotation locking device according to 1 to 3 , on average;

5 a schematic view of the rolling bearing after 1 to 3 , in longitudinal section;

6 a schematic view of the rolling bearing after 1 to 3 in longitudinal section, mounted on a shaft and provided with the rotation locking device;

7 a sectional partial view along the axis VII-VII according to 6 ; and

8th to 10 Partial views of embodiments of the rotation locking device according to 1 to 4 ,

How best in 1 to 3 and 5 to see that is the whole with the reference number 1 designated bearings a bearing with a single ring of balls and deep groove. The rolling bearing includes an inner ring 2 , an outer ring 3 , between which a wreath of rolling elements 4 is arranged, which are present here in the form of balls, a cage 5 which serves the rolling elements 4 spaced circumferentially, and two sealing devices made of metal 6 and 7 ,

The inner ring 2 is executed in one piece. The term "integral" refers to a ring whose shape is obtained from tubes, billets, forged and / or rolled blanks using machining (turning and / or grinding). The inner ring 2 has one through opposite lateral radial surfaces 2 B and 2c limited cylindrical interior 2a and a stepped cylindrical outer peripheral surface 2d in which a circular toroidal groove 2e is formed, which has a concave profile in cross section, which is adapted to a bearing surface for the rolling elements 4 to form, with the groove facing outward.

The inner ring 2 further at the level of the cylindrical outer peripheral surface 2d and near the radial surfaces 2 B and 2c two (not designated) annular grooves, with respect to a through the center of the rolling elements 4 extending plane to each other are symmetrical.

The outer ring 3 , which is also made in one piece, has an opposite lateral radial surfaces 3b and 3c limited cylindrical outer peripheral surface 3a and a stepped substantially cylindrical interior 3d in which a circular toroidal groove 3e is formed, which has a concave profile in cross section, which is adapted to a bearing surface for the rolling elements 4 to form, with the groove facing inwards.

The outer ring 3 also contains at the level of the cylindrical interior 3d and near the radial surfaces 3b and 3c two (not designated) annular grooves, with respect to one through the center of the rolling elements 4 extending plane lie symmetrically. These annular grooves are with respect to the annular grooves of the inner ring 2 arranged in the radial direction opposite.

Inside the grooves are the sealing devices 6 and 7 appropriate. The sealing devices 6 and 7 are in this way in the radial direction between the inner and outer ring 2 . 3 arranged. The sealing device 6 is in the axial direction between the rolling elements 4 and the radial surfaces 2 B and 3b The Rings 2 and 3 attached while the sealing device 7 in the axial direction between the rolling elements 4 and the radial surfaces 2c and 3c The Rings 2 and 3 is appropriate.

The outer ring 3 is also with a circumferential groove 8th provided in the amount of cylindrical outer peripheral surface 3a is arranged and has a substantially rectangular profile in cross-section. The circumferential groove 8th is here in the axial direction substantially between the center of the rolling elements 4 and the radial surface 3b of the outer ring 3 arranged. The trained with lateral radial surfaces groove 8th has an annular cylindrical base 8a on that in relation to a geometric axis 9 of the outer ring 3 is eccentric. The outer ring 3 is resting here, while the inner ring 2 is circulating. Of course, is also considered to provide a circumferential outer ring and a stationary inner ring.

The rolling bearing 1 also includes a rotation lock ring 10 , which is advantageously made of a molded plastic and inside the groove 8th is attached. The ring 10 is open along a piece of its circumference.

As in 4 more clearly shown is the ring made as a lumpy element 10 with a substantially circular arc-shaped attachment portion 11 in the radial direction through coaxial inner and outer annular cylindrical surfaces 11a and 11b is limited, and provided with a raised or a radial projection of a tongue 12 forms and the outer surface 11b extended in a section to the outside. The inner surface 11a is set up with the reason 8a the groove 8th in radial contact and has a radius of curvature substantially coinciding with that of the bottom of the groove.

In other words, the inner and outer surfaces 11a and 11b are essentially smooth and uninterrupted, and have no material degradation.

The attachment section 11 Accordingly, it has a substantially constant radial dimension, wherein this dimension is preferably dimensioned such that the outer surface 11b of the ring 10 when the tongue is centered over the deepest portion of the groove, the cylindrical outer surface 3a of the outer ring 3 does not exceed in the radial direction. Therefore, it is possible the ring 10 to construct so that the radial dimension of the attachment portion 11 less than or equal to the lowest depth of the groove 8th is. The attachment section 11 also has a substantially constant axial dimension approximately equal to the axial dimension of the groove 8th equivalent.

The attachment section 11 extends in the present case over an angle of 200 °. Of course, it is also contemplated to provide a substantially different dimension in the circumferential direction, which, however, is preferably greater than 180 ° to a proper engagement of the ring 10 in the groove 8th sure.

The tongue 12 is substantially at the height of a median plane of the attachment section 11 arranged and is generally rectangular in shape. The dimension of the tongue 12 in the circumferential direction with respect to that of the attachment portion 11 smaller and is for example between 10 ° and 15 °. The axial dimension of the tongue 12 is substantially equal to that of the attachment portion 11 while their radial dimension is noticeably larger than that of the section 11 is, for example, in a ratio of 5 to 1.

In the 6 and 7 is the rolling bearing 1 on a wave 13 with a geometric axis 14 and inside a body 15 assembled. The geometric axis 14 and the axis 9 of the outer ring 3 fall together.

The essentially annular body 15 has one beside the cylindrical outer peripheral surface of the shaft 13 arranged and outwardly extending first radial portion 15a extending from an upper end through an outwardly extending second radial section 15b is extended. The second radial section 15b has an axial dimension that is significantly larger than that of the first section 15a and for the radial surface 3b of the outer ring 3 of the rolling bearing 1 forms a contact surface. The second radial section 15b is from an upper end by an axial section 15c extended, with a cylindrical interior 15d is formed, in the interior of the outer ring 3 of the rolling bearing 1 is arranged.

The axial section 15c of the basic body 15 also has a height of the cylindrical interior 15d trained recess 16 on, which is essentially the shape of the tongue 12 of the ring 10 equivalent. The recess 16 leaves a slight radial play 17 between an outer contact surface of the tongue 12 and the axial section 15c of the basic body 15 to.

In embodiments also comes into consideration, a recess 16 to provide, which has a substantially triangular shape in cross-section, wherein the tongue 12 for example, with the previously described tongue ( 8th ) may be identical or the recess ( 9 ). Also comes into consideration, a recess 16 as they are in 10 is shown to provide, which has a profile in the form of a semicircle in cross section.

Before installing the rolling bearing 1 into the interior of the body 15 , belongs to a first step, the ring 10 inside the groove 8th of the outer ring 3 arrange so that the tongue 12 in the area of the maximum depth of the groove 8th is centered. The outer surface 11b of the attachment section 11 of the ring 10 is opposite to the cylindrical outer peripheral surface 3a of the outer ring 3 offset radially inward, with only the tongue 12 in terms of the outer surface 3a protrudes radially outward.

Subsequently, the inner ring 2 of the rolling bearing 1 on the wave 13 plugged and the shaft is inside the body 15 so attached, that the tongue 12 of the ring 10 inside the recess 16 of the axial section 15c is housed. During the insertion of the rolling bearing 1 into the interior of the axial section 15c the ring comes 10 due to its construction not with the cylindrical interior 15d engaged.

In operation, the ring remains 10 if the outer ring 3 tends to be opposite the axial section 15c of the basic body 15 to rotate, due to the positive interaction of the tongue 12 with the recess 16 immovable in the circumferential direction. The opposite the axis 9 of the outer ring 3 eccentric ground 8a the groove 8th move the ring 10 due to a cam action radially in the direction of the main body 15 , with the result, that the working game 17 is reduced until the area 12a the tongue 12 with the bottom of the recess 16 radial comes in contact. The ring 10 is blocked in this way in the radial direction, with the result that the outer ring 3 of the rolling bearing 1 is held in the circumferential direction, and a rotation of the ring relative to the interior of the body 15 therefore limited.

In addition, the provision of an inner surface allows 11a , in particular in the radial direction at the level of the tongue 12 is formed without a recess, a possible displacement of the ring 10 in the direction of the interior in the event of the occurrence of a radial force to prevent. In practice, therefore, even in the case of a significant torque, the risk of deformation of the rotation lock ring 10 especially limited, which enables the achievement of a secure and improved blocking.

Accordingly In operation, the ring realizes to lock the rotation of a Rings regarding its seating system, which is particularly easy to install, effective, reliable and economical is.

To a rolling bearing belong a circumferential ring, a stationary ring, one on a cylindrical one area having trained circumferential groove, and a wreath of between Raceways the rings arranged rolling elements. The reason the groove is opposite the axis of the stationary ring eccentric. Sitting in the groove a rotation lock ring designed to be radial Recess cooperate in the bearing seat. By twisting the ring creates a radial clamping effect, the further rotation of the ring blocked.

Claims (11)

Rotary locking device for rolling bearings with a circumferential ring ( 2 ) and a stationary ring ( 3 ), with a circumferential groove formed in one of the cylindrical surfaces ( 8th ), whose base is eccentric with respect to the axis of the stationary ring, and with a ring of rolling elements arranged between bearing surfaces of the rings ( 4 ), and with a rotation lock ring ( 10 ), which is intended to be in the groove ( 8th ), characterized in that the ring ( 10 ) is limited in the radial direction by coaxial inner and outer cylindrical surfaces, that to the ring ( 10 ) further comprises at least one radial projection having a tongue ( 12 ), which is adapted to, inside a recess ( 16 ), which is formed in a seat, in the interior of which the stationary ring ( 3 ) and that the tongue ( 12 ) has at least one surface with the recess ( 16 ) is in contact during an angular change of the stationary ring ( 3 ) relative to the seat a radial force on the recess ( 16 ) exercise. Device according to Claim 1, in which the radial thickness of the ring ( 10 ) is adapted so that the cylindrical outer peripheral surface of the ring is arranged in an area which is in the radial direction between a ground ( 8a ) of the groove and the cylindrical surface of the stationary ring is limited when the tongue is centered over the deepest portion of the groove. Device according to Claim 2, in which the radial thickness of the ring ( 10 ) substantially less than the depth of the groove ( 8th ). Device according to one of the preceding claims, in which the ring ( 10 ) is open in a portion of its circumference. Device according to one of the preceding claims, in which the ring ( 10 ) extends over an angle of 180 ° to 360 °. Device according to one of the preceding claims, in which the ring ( 10 ) has a substantially constant axial dimension. Device according to one of the preceding claims, in which the ring ( 10 ) is injected from a plastic. Device according to one of the preceding claims, in which the ring ( 10 ) a single tongue ( 12 ) having. Device according to one of the preceding claims, in which the tongue ( 12 ) and the ring ( 10 ) are made in one piece. Bearing arrangement with a circumferential ring ( 2 ), with a stationary ring ( 3 ) having an annular groove formed on a cylindrical surface ( 8th ), the bottom of which is eccentric to the axis of the stationary ring, with a ring of rolling elements arranged between bearing surfaces of the rings ( 4 ) and with an in the groove mounted rotary locking ring ( 10 ), characterized in that the ring ( 10 ) is limited in the radial direction by coaxial inner and outer cylindrical surfaces, that the ring also has at least one radial Protrusion of a tongue ( 12 ) adapted to be inserted in a recess formed in a seat inside which the stationary ring is mounted, and in that the tongue has at least one surface in contact with the recess during an angular change of the stationary ring relative to the seat to exert a radial force on the recess. A machine comprising a fixed part, a moving part and at least one bearing arrangement arranged between the parts and comprising: - a peripheral ring ( 2 ), - a stationary ring ( 3 ), which has a circumferential groove formed on a cylindrical surface ( 8th ), whose base is eccentric with respect to the axis of the stationary ring, - a series of rolling elements arranged between bearing surfaces of the rings ( 4 ), and - a rotation lock ring ( 10 ), characterized in that the ring ( 10 ) is bounded in the radial direction by coaxial inner and outer cylindrical surfaces and also has at least one radial projection having a tongue ( 12 ) formed inside a recess ( 16 ) formed in a seat of the fixed part, inside which the stationary ring is arranged, and in that the tongue has at least one surface which is in contact with the recess during an angular change of the stationary ring relative to the seat to exert a radial force on the recess.