WO2016162478A1

WO2016162478A1 - Adjustable bearing unit, in particular for pedestal bearings

Info

Publication number: WO2016162478A1
Application number: PCT/EP2016/057750
Authority: WO
Inventors: Tommy URBAN
Original assignee: Igus Gmbh
Priority date: 2015-04-10
Filing date: 2016-04-08
Publication date: 2016-10-13
Also published as: DE202015101768U1

Abstract

The invention relates to an adjustable bearing unit (10) for a rolling or sliding bearing, the bearing housing (12) of which, comprising a receiving means (14) and a main axis (A), has a base (20) comprising at least one support surface (21, 22) on which the bearing housing abuts, and, which is arranged on same rotatable relative to the bearing housing (12) and around a rotational axis (R) perpendicular to the main axis (A). The support surface (21, 22) of the base rises in the circumferential direction, in particular continuously. In this way, the height (h1...h4) between a base surface (23) and the abutting region of the support surface (21, 22) is changed with the angle around the rotational axis (R), in particular in a stepless manner, i.e. the distance between the main axis (A) and support surface (21, 22) can be adjusted in a simple manner.

Description

Adjustable bearing unit, in particular for pillow block bearings

The invention relates generally to a storage unit as

Machine element with a bearing housing for receiving and securing a rolling or sliding bearing. The invention particularly relates to an adjustable pillow block bearing.

Bearing units are used in a wide variety of designs and sizes. Depending on the warehouse task, there are

different housing shapes. A pillow block is usually mounted upright on a mounting surface and has a bearing housing usually called bearing block.

The housing shape of the bearing unit and thus the spatial position of the nominal axis for storage are given. However, the actual position of the component to be supported, typically a shaft, deviates due to misalignment,

Misalignments, deflections and / or the like. often off.

In many cases, such effects can not be prevented constructively. So far, misalignments are usually offset by underlayers, eg washers, adapters or the like. Concerning height adjustable outriggers, is from another non-generic area, namely to replace chocks for the construction of machinery, eg for marine engines, from the patent GB 812,789 A an adjustable support device known. These

Support device has two relatively rotatable elements with opposite surfaces

forming helical inclined planes.

A first object of the present invention is therefore to propose a bearing unit which is adjustable such that the nominal position of the axis defined by the bearing housing (main axis) is adjustable and so on

Error compensation, in particular a misalignment compensation, is simplified in the assembly.

To solve this problem is an adjustable

Bearing unit proposed, which consists of two main components, a bearing housing with a receptacle for a rolling or sliding bearing and a rotatable base. The

Bearing housing defined with its inclusion a major axis. The base acts like a pedestal, for mounting in any direction, hanging, sloping or horizontal. The base has at least one support surface on which the bearing housing rests, and an opposite base for mounting.

According to the invention, the pedestal is arranged about an axis of rotation perpendicular to the main axis and relatively rotatable on the bearing housing and the at least one support surface extends in

Circumferential direction, i. tangential to the axis of rotation

considered, rising. Thus, the height of the base between base and support surface is variable and changed with the Drehwinke or polar angle about the axis of rotation. The supporting height between the voltage applied to the bearing housing area of the support surface and the base surface and thus the distance between the main axis and the base is thus particularly easy by turning the stand

adjustable. In other words, the bearing housing is complemented by a rotatable mounting base, the "effective" support height depends on its rotational position relative to the bearing housing.Other components such as washers or chocks are usually no longer required.

In a preferred embodiment, the base has two axially symmetrical to the axis of rotation arranged support surfaces. These can extend over a circular arc segment, which is at least 120 ° of the circumferential angle to provide a large adjustment range even at low pitch. The support surfaces extend, preferably over a circumference of between 90 ° and 170 °, more preferably greater than 150 °.

In a particularly preferred embodiment, the support surfaces extend continuously or continuously rising in the circumferential direction, preferably shaped as helical surfaces. However, stair-shaped support surfaces are also conceivable, in particular if parallelism to the main axis is necessary.

In helical surfaces which are arranged helically about the axis of rotation, are preferably correspondingly conjugated or appropriately shaped contact surfaces on the bearing housing

provided, which are adapted to the spiral surface.

Especially with helical support surfaces is preferably provided that the stand self-locking with the

Bearing housing cooperates. This can be done by appropriate

Pairing of the materials, i. by a suitable

Choice of material for the base and / or selection of the

Slope angle of the support surfaces can be achieved. Of the

The slope angle here is the arctangent of

(Slope / pitch diameter * n), where the slope is the axial distance per revolution.

Alternatively or additionally, by shaping the adjacent surfaces, for example by a toothing or the like. a blocking of the rotation during fastening

be ensured perpendicular to the main axis.

In a structurally simple realization of the stand has a circular cylindrical recess coaxial with the axis of rotation, in which engages a corresponding pivot pin of the bearing housing. The recess may pass, i. the base has a disk-shaped base around a loosening or

Adjust from the side of the base to allow. The recess can also be designed as a blind hole. Of the

Pintle is preferably made in one piece with the bearing housing and is perpendicular to the main axis.

The base and / or the bearing housing may be made of metal or Kunstsoff. Particularly preferred is a production with injection molded parts, in which the

Bearing housing made of a fiber-reinforced plastic, e.g. a polyamide. The base is preferably made of a suitably chosen dimensionally stable plastic

produced, which allows a self-locking frictional engagement with the fiber-reinforced plastic. The bearing housing can be made in one, two or more parts. Of the

Stand is preferably in one piece.

In the base are preferably provided through recesses for mounting screws, which by

Through holes in the bearing housing parallel to the axis of rotation are used on both sides next to the receptacle. In order not to affect the rotation, the

Recesses in the base circular arc around the axis of rotation. Furthermore, it is advantageous to provide the recesses centrally in each support surface and symmetrically to the axis of rotation. They each have a diameter of

Through holes adapted radial dimension matching the mounting screws. In the context of the invention are embodiments for rolling and plain bearings in a variety of designs and sizes of the bearing housing. The bearing housing may be made of plastic and / or metal. For plain bearings, eg linear plain bearings, radial plain bearings or combined radial-linear bearings, the bearing housing can be made in one piece with a cylindrical receptacle which directly receives a shaft. The recording can also take a rolling bearing in this embodiment. The bearing housing can also be made in two parts with spherical shaped receptacle which accommodates bearing calottes, such as in a pillow block.

Accordingly, the invention particularly but not exclusively relates to a height-adjustable pillow block.

The invention is suitable in particular but not exclusively for the compensation of a use

Misalignment of a shaft to be stored or for precise positioning when storing a shaft.

Further details, features and advantages of the invention will become apparent from the following, more detailed description of a preferred embodiment with reference to the accompanying figures. These show, without limiting the scope of protection:

FIG.1A: a front view of a pillow block

executed storage unit, partially cut; FIG. 1B shows a side view of the bearing unit from FIG. 1A;

FIG. IC: a top view of the bearing unit of FIG. 1A-1B;

FIG.1D: a full section acc. Section ID-ID in

FIG.1A through the main and rotary axes.

In the embodiment of FIG.l a bearing unit 10 is shown, which is designed as a pillow block. In the bearing housing 12 is a circular cylindrical shaped around a main axis A receptacle 14 provided with a diameter dl, for example, for the sliding bearing a shaft (not shown) or

Mounting a rolling bearing (not shown). The receptacle 14 may e.g. also have a spherical inner wall. Another important component of the two-part bearing block is the socket-like, separately produced mounting base or base 20. To compensate for misalignment can, the bearing unit 10 in a simple manner at the height Hvar of the main axis A relative to the mounting surface, i. of the

Base 23 of the base 20 are adjusted.

For this purpose, the base 20 is rotatable about a rotation axis R relative to the bearing housing 12 and has two

helical surfaces as support surfaces 21, 22 for the bearing housing 12, which conjugate shaped

helical wing as contact surfaces 15, 16 has. The rotation axis R intersects the main axis A vertically.

To adjust the height Hvar only the base 20 has to be rotated accordingly to the rotation axis R relative to the bearing housing 12. The slope of the support surfaces 21, 22 is chosen taking into account the material pairing so that due to a self-locking height Hvar is maintained when tightening screws. The height of the base 20 between the support surfaces 21, 22 and the

Base 23 rises from the minimum height hl steadily helical to the maximum height h4. The heights h2 and h3 are purely exemplary referred to as intermediate values.

Two fixing screws (not shown) become the

Attachment through through holes 18, 19 in the bearing housing 12 with diameter d2 and axially symmetrical centrally in the support surfaces 21, 22 provided recesses 25, 26 out with play through the base 20. The radial dimension rl and the axial distance are in this case suitable for the diameter d2 or the center distance d3. The through holes 18, 19 are parallel to the axis of rotation R on both sides next to the

Recording 14.

The bearing housing 12 is substantially mirror-symmetrical to the cutting plane ID-ID in FIG.1A. The area measure of a

The base 20 is axially symmetrical with respect to the axis of rotation R. The support surfaces 21, 22 in total constitute approximately 50% of the base area 23 in terms of area. A stable construction is achieved with an integral part on the bearing housing 12 shaped or mitformed cylindrical

Pintle 17 coaxially engages in a corresponding recess 24 in the base 20 and thus defines the axis of rotation R, wherein the pivot pin is approximately in diameter about 33% of the side length of the approximately cuboid bearing housing 12. The total height of the base 20 is dimensioned so that a pivot pin 17 with at least 33% of the minimum height Hvar at minimum height hl in this rotational position does not project beyond the base 23, as FIG.1D shows. The bearing unit 10 can be mounted in any spatial position, the center distance Hvar of the axis A to the base 23 is adjustable over a rotation angle range which is limited by the radians of the recesses 25, 26, here about 145 °. The compact two-part construction of the bearing unit 10 of bearing housing 12 and base 20 allows an easy-to-use height adjustment of the shaft height Hvar to align a shaft, e.g. to compensate for misalignments. It is suitable for plain bearings (radial and / or linear plain bearings), spherical bearings, rolling bearings, etc.

The bearing housing 12 and the base 20, in particular the specially designed contact surfaces 15, 16 and support surfaces 21, 22 can be easily produced by injection molding as plastic parts.

Adjustable bearing unit, in particular for pillow block bearings

LIST OF REFERENCES FIG.1A-1D

10 storage unit

12 bearing housing

14 recording

15, 16 contact surface

17 pintle

18, 19 Through hole

20 base

21, 22 support surface

23 base area

24 recess

25, 26 recess

A main axis

dl, d2 diameter

d3 center distance

Hvar wheelbase

hl ... h4 height

R rotation axis

rl radial dimension

Claims

Adjustable bearing unit, in particular for pillow block bearings

Protection Claims 1. An adjustable bearing unit (10) comprising

a bearing housing (12) having a receptacle (14) defining a major axis (A), in particular for a rolling or sliding bearing; and

a base (20) having at least one support surface (21, 22) on which the bearing housing rests, and with a base surface (23) facing away from the bearing housing; wherein the pedestal about a rotational axis (R) perpendicular to the main axis (A) and relative to the bearing housing (12) is rotatably arranged on the latter; and

wherein the at least one support surface (21, 22) in

Circumferential direction increases, so that the

Height (hl ... h4) between base (23) and the adjacent region of the support surface (21, 22) with the angle about the rotation axis (R) changed.

Adjustable storage unit according to claim 1, characterized in that the base (20) has two for

Rotary axis (R) symmetrically arranged support surfaces (21, 22) which extend over a circular arc segment, preferably over a circumferential angle greater 120 °.

3. Adjustable bearing unit according to claim 1 or 2,

characterized in that the support surfaces (21, 22) extend continuously increasing in the circumferential direction.

4. Adjustable bearing unit according to claim 3, characterized

characterized in that the support surfaces (21, 22) are shaped as helical surfaces, and preferably

correspondingly shaped contact surfaces (15, 16) of the

Bearing housing are provided, which are respectively adapted to the helical surface.

5. Adjustable bearing unit according to claim 3 or 4,

characterized in that the base (20)

self-locking with the bearing housing (12) cooperates.

6. Adjustable bearing unit according to one of claims 1 to 5 claims, characterized in that the base (20) has a circular cylindrical recess (24) coaxial with the axis of rotation (R), in which a corresponding pivot pin (17) of the bearing housing (12) engages ,

7. Adjustable bearing unit according to one of claims 1 to 6, that the base (20) and / or the bearing housing (12) are made of plastic, in particular as injection molded parts.

8. Adjustable bearing unit according to one of the preceding claims, characterized in that in the base

(20) through recesses (25, 26) for

Fixing screws are provided, in particular aligned with through holes (18, 19) in

Bearing housing parallel to the axis of rotation (R) on both sides next to the receptacle.

9. Adjustable bearing unit according to one of claims 1 to 8, characterized in that the bearing housing (12) is made in one piece with cylindrical

Recording (14) as a linear and / or radial plain bearing for a shaft or a rolling bearing.

10. Adjustable bearing unit according to one of claims 1 to 8, characterized in that the bearing housing (12) is made in two parts with spherical

Support (14) for bearing dome.

11. Adjustable Plummer block (10) according to one of claims 1 to 10.

12. plain bearings, in particular linear plain bearings,

Radial plain bearing or radial linear bearing, comprising an adjustable bearing unit (10) according to one of claims 1 to 10, in particular according to claim 9 or 10, as well as a component to be mounted movably,

in particular a shaft, which directly or by means of at least one sliding element in the

Recording (14) is stored or guided.

13. Use of an adjustable storage unit (10) according to one of claims 1 to 10 to compensate for a

Misalignment of a shaft to be stored.

Use of an adjustable bearing unit (10) according to one of claims 1 to 10 supporting a shaft.