DE102006059346B4 - Bearing seat arrangement for axial and radial fixation - Google Patents

Abstract

Bearing seat arrangement (9) for axially and radially fixing an outer ring (12) of a rolling bearing (6) of a drive device (1), in particular a windshield wiper drive (2), wherein the drive device (1) at least one housing part (24) and the bearing seat assembly ( 9) is formed radially in two parts, of which one part (10, 30, 35) of the housing part (24) and the other part (14, 33, 36) of a separate part (16), in particular of a molded part is formed, wherein both parts (10, 14, 30, 33, 35, 36) each have an open-edged recess (11, 15, 37, 45) for radially receiving at least a portion of the rolling bearing (6), and wherein the recess (11, 15 , 37, 45) - seen in cross-section - at least partially circular cylindrical, characterized in that the two parts (10, 14, 30, 33, 35, 36) by means of bolts (32) are fixed to each other, arranged in an angle to each other Bore (34) through the other part (33 ) in which a part (30) protrude, are introduced.

Description

The invention relates to a bearing seat arrangement for the axial and radial fixing of an outer ring of a rolling bearing of a drive device, in particular a windshield wiper drive.

State of the art

Bearing seat arrangements for the axial and radial fixing of an outer ring of a roller bearing are widely known. Usually, the outer ring of the rolling bearing is axially introduced into a bearing seat and pushed to a stop. Subsequently, the outer ring of the bearing is axially secured, for which purpose, for example, a retaining ring or snap ring is used, which is introduced into a running on the inside of the bearing seat groove. As a rule, a retaining ring is clamped between the snap ring and roller bearing outer ring. A disadvantage of such a bearing seat arrangement is that care must be taken in the design of the drive device on a particularly suitable assembly design, so that all components of the drive device or a bearing having the rolling bearing can actually be mounted.

Corresponding or similar bearing seat arrangements are for example made FR 28 76 630 A1 . FR 28 32 481 A1 . EP 1 517 054 A1 . JP H11-210774A . DE 10 2004 061 614 A1 . DE 36 05 355 A1 . DE 21 07 874 A . DE 79 36 679 U1 . US 2,872,253 A . DE 37 26 751 A1 and US Pat. No. 6,536,594 B2 known.

Disclosure of the invention

The invention with the features of claim 1 provides a bearing seat assembly for axially and radially fixing an outer ring of a rolling bearing of a drive device, in particular a windshield wiper drive before, wherein the drive device has at least one housing part and the bearing seat assembly is formed radially in two parts, of which a part of the Housing and the other part of a separate part, in particular of a molded part, is formed. The bearing seat assembly is thus formed radially in two parts, which means that the bearing seat of the bearing formed by the bearing seat assembly consists of two parts which are radially mounted. As a result, a designer will be given more degrees of freedom for the formation of the drive device, since, for example, the shaft bearing the rolling bearing can be used fully assembled in the bearing seat assembly. According to the invention, a part of the bearing seat assembly is formed by the housing of the drive device, so it is integrally formed therewith. Thus, the rolling bearing or the rolling bearing bearing shaft can be mounted in a simple manner, the other part of the bearing seat assembly is formed by a separate part, in particular a molded part, which is then mounted (radially), so that the rolling bearing axially and radially is fixed.

According to the invention, both parts of the bearing seat arrangement each have an open-edged recesses for radially receiving at least one region of the rolling bearing. According to the invention, the recess is formed such that it is formed at least partially - seen in cross section - circular cylindrical. In other words, the recess thus at least partially perpendicular to the axis of rotation of the bearing has a circular cylindrical shape, preferably with a radius which substantially corresponds to the outer radius of the outer ring of the rolling bearing, so that in the inserted state in the recess of the bearing surface contact is ensured. In this case, at least one area of the rolling bearing is received in each of the parts. Of course, the bearing seat assembly expediently at least on one (axial) side of a recess, so that a shaft of the drive device can be operatively connected to the rolling bearing. In a preferred embodiment of the invention, both parts take on each half of the rolling bearing. In an alternative preferred embodiment of the invention, the roller bearing is completely received by the recess of one part (of the housing), wherein the other, separate, introduced into the one part only receives a small portion of the rolling bearing.

Advantageously, the bearing seat assembly on a mounting guide, so that the bearing seat assembly forming parts are aligned during assembly and no unwanted stresses in the bearing seat assembly and / or the rolling bearing arise.

According to a development of the invention, the mounting guide is formed by at least one engaging in a groove projection, wherein the groove expediently perpendicular to the axis of rotation of the rolling bearing. The groove and / or the projection preferably have insertion aids, for example in the form of insertion phases.

Conveniently, the projection is formed as a web, so that a particularly simple assembly is possible, and beyond high axial forces can be absorbed.

Conveniently, the projection is formed on one part or the other part and the groove on the other or the one part. Alternatively, at the one part, both the projection and a groove, for example on different sides, and be formed according to a groove and a projection on the other part.

Advantageously, the two parts by means of screws and / or according to the invention with bolts attached to each other, so that the rolling bearing is clamped both in the axial direction and in the radial direction.

Alternatively or additionally, at least one of the parts is plastically deformed in regions. In this case, after the joining of the two parts, at least one of the parts is plastically deformed in certain regions such that the deformed region cooperates with a correspondingly formed region of the other part, so that a positive connection is created.

Furthermore, it is conceivable to provide a latch, wherein the latch advantageously has at least one elastically deformable latching element. For example, the latching element has a latching projection, which engages upon assembly of the parts due to the inherent elasticity of the latching element in a corresponding latching recess of the bearing seat assembly. Advantageously, the locking element is arranged on the other, separate part. Particularly preferably, the latching element is integrally formed with the other part. Particularly preferably, the other part is formed as a deep-drawn part, whereby the desired shape and also such a, so integrally formed with the other part locking element in a simple manner can be produced.

According to a development of the invention, the other part is formed integrally with a housing cover of the drive device. In this case, therefore, the other part is formed by the housing cover. Thus, the rolling bearing is fixed by fixing the housing cover to the housing part. This facilitates in particular the manufacturing process and the assembly effort.

According to a development of the invention, the rolling bearing is a deep groove ball bearing, cylindrical roller bearing or a needle roller bearing.

Brief description of the drawings

In the following, the invention will be explained in more detail with reference to some figures.

Show

1 a schematically illustrated windshield wiper drive,

2a and 2 B A first embodiment of an advantageous bearing seat arrangement,

3a and 3b the windshield wiper drive from the 1 with an associated housing part,

4a to 4c an inventive embodiment of the bearing seat assembly,

5a to 5c a further embodiment of the bearing seat arrangement,

6a and 6b a further embodiment of the bearing seat arrangement,

7a and 7b a further embodiment of the bearing seat arrangement,

8th a deep-drawn part with locking elements and

9 another deep-drawn part with locking elements.

Embodiment (s) of the invention

The 1 shows by way of example in a sectional view a drive device 1 a windshield wiper drive 2 , The drive device 1 has an electric motor 3 on, over a drive shaft 4 one on the drive shaft 4 arranged helical worm wheel 5 drives. Between the electric motor 3 and the worm wheel 5 is a rolling bearing 6 as a deep groove ball bearing 7 is formed on the shaft 4 arranged. The rolling bearing 6 serves to support the drive shaft 4 in a housing part, not shown here. Usually, such a rolling bearing 6 mounted axially, ie in the direction of the axis of rotation 8th the drive shaft 4 or the electric motor 3 inserted into a bearing seat.

The 2a and 2 B show a first embodiment of an advantageous bearing seat assembly. The 2a shows in a sectional view of the rolling bearing 6 or deep groove ball bearings 7 and a part 10 the advantageously two-piece bearing seat assembly 9 , The part 10 has an open-edged recess 11 for radially receiving a portion of the rolling bearing 6 on. Advantageously, only the outer ring 12 of the rolling bearing 6 or the deep groove ball bearing 7 from the part 10 taken, which is the rolling bearing 6 receiving recess 11 is advantageously designed such that its shape substantially that of the rolling bearing 6 corresponds and thus this fixed axially and radially (at least partially). In the illustrated embodiment, one half of the rolling bearing 6 or the outer ring 12 of the rolling bearing 6 into the depression 11 brought in. The part 10 the bearing seat arrangement 9 is advantageously of a housing part 13 the drive device 1 educated. The 2 B show the Bearing seat arrangement 9 from the 2a , being on the part 10 a second part 14 the bearing seat arrangement 9 is applied and the remaining half of the rolling bearing 6 in an open-edged depression 15 receives. The wells 11 and 15 are each advantageously semicircular cylindrical, so that the rolling bearing 6 or the outer ring 12 over its entire circumference in surface contact with the bearing seat assembly 9 stands. Advantageously, the part 14 as a separate part 16 , in particular as a separate molded part formed. The part 10 has blind holes 17 on, the partially with a thread 18 are provided. The part 14 has punctures 19 on, guided by each one screw and into the thread 18 can be screwed. Advantageously, the perforations 19 a sinking 20 have, so that the screw head of a screw, not shown here in the part 14 can be sunk. By screwing the two parts 14 and 10 becomes the rolling bearing 6 finally axially fixed and now radially fixed in each direction. The parts 10 and 14 continue to have substantially (semi-) circular cylindrical recesses 21 and 22 on, whose radius is smaller than that of the wells 11 respectively 15 so that only the outer ring 12 of the rolling bearing 6 or the deep groove ball bearing 7 from the parts 10 and 14 is enclosed. This will, among other things, the cooling of the bearing 6 promoted. In addition, this allows the drive shaft 4 through the bearing seat assembly 9 can be performed.

The 3a and 3b show by way of example the drive device 1 in a plan view ( 3a ) and a side view ( 3b ) of a section along the axis of rotation 8th the drive device 1 , The drive device 1 of the windshield wiper drive 2 indicates the electric motor 3 having housing part 23 and a worm wheel 5 having housing part 24 on, with the housing part 23 the housing part 24 at an open end 25 in some areas. In the end 25 opposite closed end 26 of the housing part 23 is the wave 4 by means of a rolling bearing 27 stored.

The housing part 24 forms the part 10 the rolling bearing 6 fixing bearing seat arrangement 9 , The other part 14 is there, as in the 3a shown in a recess 28 of the housing part 24 introduced and as in the 2a and 2 B with the part 10 screwed. The housing part 24 furthermore has a substantially circular cylindrical receptacle 29 on, like in the 3b shown, which receives a not shown here actuating shaft of a windshield wiper, which with the worm wheel 5 is actively connected.

The advantageous embodiment of the bearing seat arrangement 9 as a two-piece bearing seat assembly, of which the part 10 from the housing part 24 and the part 14 from a separate part 16 is formed, allows a particularly simple assembly of the drive device 1 , Even during the design of the designer much more freedom of design for the drive device 1 given are. For example, in the development of the drive device 1 Care should be taken not to change the diameter of the worm wheel 5 smaller than the one through the recesses 21 and 22 formed opening through which the worm wheel 5 usually would be performed during assembly. In an alternative embodiment of the part 14 this is formed by a housing cover. For example, the area above the axis of rotation 8th in the 3a shown housing part 24 be designed as a housing cover while integrally the part 14 exhibit. So could in the assembly in the 1 illustrated drive device 1 in a simple manner radially into the housing part 24 are used, in which case the above-described housing cover placed, and thus the rolling bearing 6 is fixed radially and axially, and then the housing part 23 with the housing part 24 is connected.

The 4a and 4b show an alternative embodiment of the bearing seat assembly 9 with one of the housing part 24 formed part 30 which is essentially the part 10 corresponds, with the difference that in the border area in each case a projection 31 is provided, which is slightly higher than the radius of the outer ring 12 of the rolling bearing 6 is trained. Instead of a screw, as in the 2 B and 2c shown, serve bolts 32 for fixing a separate part 33 which is essentially the part 14 matches, with the bolts 32 in obliquely arranged holes 34 passing through the part 33 in the part 30 protrude, are introduced. The rolling bearing 6 radially receiving open-edged depressions 11 and 15 should not be further described here, as they are those in the 2a and 2 B correspond. The part 33 closes in the introduced state advantageously with the projections 31 of the part 30 so that it is completely in the part 30 is introduced. The 4c shows the bearing seat arrangement 9 of the 4a and 4b in a sectional view, of course, only the outer ring 12 of the rolling bearing 6 actually in touch with the part 33 stands.

Advantageously, the projections 31 and the part 33 an assembly guide, which is an alignment of the rolling bearing receiving recesses 11 . 15 guarantee. Advantageously, have the projections 31 on her to the rolling bearing 6 pointing page 31 ' a groove on, in the one on the part 33 arranged projection, which is advantageously designed as a web, can be inserted. Alternatively or additionally, the part may 33 also through the housing part 24 , like in the 3a for the part 14 represented by the recess 28 be guided axially.

The 5a to 5c show a further embodiment of the bearing seat assembly according to the invention 9 , The 5a and 5b show a part in a plan view 35 that is essentially the part 10 corresponds, with the difference that the rolling bearing 6 receiving recess 11 is formed such that they the entire rolling bearing 6 receives. Of course the deepening 11 is designed so that the rolling bearing 6 is radially introduced. Like the part 10 is also the part 35 from the housing part 24 educated. As in the 5b and 5c the second part of the bearing seat arrangement is represented by a part 36 formed, with the part 36 is formed as a separate part which is U-shaped and in the attached state, at least a portion of the part 35 and a portion of the outer ring 12 of the rolling bearing 6 encloses. A deepening 37 of the part 36 is advantageously at least partially circular cylindrical, so that a surface contact with the outer ring 12 of the rolling bearing 6 arises. Alternatively to the one in the 5c illustrated training, in which only one side of the part 35 the rolling bearing 6 almost completely covered, could also be the side 38 opposite side 39 be formed in such a way, in which case the part 36 also an area of the page 39 of the part 35 would enclose.

The 6a and 6b show the bearing seat assembly 9 from the 5a to 5c with the difference being that part 35 a much wider recess 21 has, whereby a better cooling of the rolling bearing 6 is guaranteed.

The 7a and 7b show a further embodiment of the bearing seat assembly according to the invention 9 These are essentially those in the 4a and 4b illustrated bearing seat assembly 9 corresponds, why in the 7a and 7b the same reference numerals are used. The difference to that in the 4a and 4b illustrated bearing seat assembly 9 lies in that part 33 the exposed half of the rolling bearing 6 not completely receives, but only a portion thereof, similar to the bearing seat assembly 9 in the 5a to 6b shown, where here is the part 33 on a shoulder 40 attached to the projections 31 is formed, rests, and thus sunk arranged ( 7b ).

Advantageously, the separate part 14 . 33 or 36 formed in the housing part 10 . 30 respectively 35 locked. This can be the separate part 14 . 33 . 36 as a deep-drawn part 41 , like in the 8th represented, be formed. The deep-drawn part 41 has at its sides in each case an elastically displaceable latching element 42 on, when inserting the deep-drawn part 41 in a corresponding receptacle first in the direction of the arrows 43 is shifted, and upon reaching a fixing position (in which the rolling bearing 6 fixed) due to their inherent elasticity against the arrows 43 move outward and engage in a locking recess, so that a retraction of the part 41 in the direction of the arrow 44 not possible. Advantageously, the deep-drawn part 41 a substantially circular cylindrical as a recess 45 trained receptacle for the outer ring 12 of the rolling bearing 6 on.

9 shows a further variant of a deep-drawn part 46 with elastically displaceable locking elements 47 , but not here as in the 8th shown radially, but axially on the deep-drawn part 46 are arranged. The deep-drawn part 41 or 46 can either as a separate part of the bearing seat assembly 9 or as an additional fastening element, which is the respective separate part 14 . 33 or 36 fastened, used. The parts described above 10 . 30 and 35 are, as already said, according to the invention integral with the housing part 24 educated.

Of course, combinations of the previously described types of mounting and bearing seat arrangements are conceivable.

Claims (8)

Bearing seat arrangement ( 9 ) for the axial and radial fixation of an outer ring ( 12 ) from a rolling bearing ( 6 ) a drive device ( 1 ), in particular a windshield wiper drive ( 2 ), wherein the drive device ( 1 ) at least one housing part ( 24 ) and the bearing seat arrangement ( 9 ) is formed radially in two parts, of which a part ( 10 . 30 . 35 ) of the housing part ( 24 ) and the other part ( 14 . 33 . 36 ) from a separate part ( 16 ), in particular of a molded part, wherein both parts ( 10 . 14 . 30 . 33 . 35 . 36 ) each have an open-edged recess ( 11 . 15 . 37 . 45 ) for radially receiving at least a portion of the rolling bearing ( 6 ), and wherein the depression ( 11 . 15 . 37 . 45 ) - seen in cross section - at least partially circular cylindrical, characterized in that the two parts ( 10 . 14 . 30 . 33 . 35 . 36 ) by means of bolts ( 32 ) are attached to each other, in an obliquely arranged bore ( 34 ), through the other part ( 33 ) in the one part ( 30 ) are introduced, are introduced. Bearing seat arrangement according to claim 1, characterized in that the bearing seat arrangement ( 9 ) has an assembly guide. Bearing seat arrangement according to one of the preceding claims, characterized in that the mounting guide is formed by at least one engaging in a groove projection. Bearing seat arrangement according to one of the preceding claims, characterized in that the projection is designed as a web. Bearing seat arrangement according to one of the preceding claims, characterized in that the projection on the one part ( 10 . 30 . 35 ) or the other part ( 14 . 33 . 36 ) and the groove on the other part ( 14 . 33 . 36 ) or the one part ( 10 . 30 . 35 ) is trained. Bearing seat arrangement according to one of the preceding claims, characterized in that at least one of the parts ( 10 . 14 . 30 . 33 . 35 . 36 ) is partially plastically deformed. Bearing seat arrangement according to one of the preceding claims, characterized in that the other part ( 14 . 33 . 36 ) in one piece with a housing cover of the drive device ( 1 ) is trained. Bearing seat arrangement according to one of the preceding claims, characterized in that the rolling bearing ( 6 ) a deep groove ball bearing ( 7 ), Cylindrical roller bearing or a needle roller bearing is.

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