DD286402A5 - ADJUSTABLE WAFER STORAGE FOR WAVES - Google Patents

Abstract

An adjustable roll bearing for waves, in particular a two-point arrangement for the highly accurate storage of waves precision mechanical devices, includes a first and second rolling bearings A and B, each one in the housing 2 fixed Auszenring 3; 4 and one arranged on the shaft 1 inner ring 5; 6 with interposed balls 7; 8, wherein the ball surface 9 and 10 of each Auszenringes 3; 4 is a concave spherical surface. Each inner ring 5; 6 is a shaft flange 12 arranged on the shaft 1; Assigned to 13, with the respective inner ring 5; 6 is in operative connection. Each shaft flange 12; 13 lies with its conical Anlageflaeche 14; 15 at a spherical adjustment surface 16; 17 of its associated inner ring 5; 6 on. The Kruemmungspunkt the Kugellaufflaeche 9 of Auszenringes 3 of the rolling bearing A and the Kruemmungsmittelpunkt the Justierflaeche 17 of the inner ring 4 of the rolling bearing B coincide at a point M1, and the Kruemmungsmittelpunkt the Kugellaufflaeche 16 of the Auszenringes 4 of the rolling bearing B and the Kruemmungsmittelpunkt the Justierflaeche 16 of the inner ring 5 of the rolling bearing A coincide at a point M2. M1 and M2 are located on the central axis 11 of the shaft 1. Figure {Waelzlagerung, adjustable; Bearings; Wave; Two bearing arrangement; Double dome bearings, high precision; Adjustment; Rotary axis, geometric, kinematical; Eccentricity}

Description

For this 1 page drawing

Field of application of the invention

The invention relates to an adjustable rolling bearing for waves, in particular designed as a two-bearing assembly, adjustable Doppelkalottenlager hochgena'jen storage of waves, especially for precision mechanical devices.

Characteristic of the known state of the art In highly accurate axle bearings is often the requirement, the kinematic D ehachse with the geometric axis of rotation

to bring into line.

It is well known that in rotary bearings, the deviations of the kinerimiioühen of the geometric axis of rotation depending

can be of the most varied quality according to the quality of the bearing elements involved and the existing functional requirements. Thus, the geometric runs around the kinematic axis and prescribes through the resulting envelopes to the kinematic

Rotary axis symmetrical rotation body, such. As a cylinder, a cone, with the tip to each other lying cone or

with their top surface facing each other truncated cones.

There are currently two ways to solve this problem. So once with a high technological effort this Deviations are minimized by the fact that the components used are manufactured and assembled with the highest accuracy

become. However, if this requirement only exists for one point of the geometric axis of rotation or for the plane perpendicular thereto, then the great technological expenditure for the production of the bearing elements is eliminated, but it is

Adjustment options with corresponding degrees of freedom at the junction between the geometric axis of rotation and

required to be stored component.

Technical solutions for a parallel shifting of the respective single eccentricities of the two participating bearing points, eg. B.

By means of cone eccentric are well known. Spatial tilting of the mounted shaft can not be compensated or adjusted by this solution.

It is an adjustable angular contact ball bearing assembly for hochgenaua.Lagerungen precision mechanical devices proposed

in which each of the two bearings has an outer and an inner ring with balls arranged therebetween.

Here, the ball raceway of the arranged in the housing of the device outer ring is a concave spherical surface, and the

inner ring, which sits on the shaft to be stored, has as tread two Anwälzschultern. The outer ring sits with one

Sphere on a fixed housing in the Kalottenring and is adjustable thereon. The inner ring can be on the Wave is moved. In this arrangement zwir is at a constant Abwälzgeometrie in the camp and a sensitive adjustment of the shaft

achieved an advantageous spatial adjustment of the kinematic axis, but it still remains the

Difference of the position of the geometric to the kinematic axis of the storage received.

Object of the invention

It is the object of the invention to overcome the disadvantages of the prior art, i. to eliminate the high technological effort with highly accurate bearings by adjustable bearings.

Explanation of the essence of the invention

The invention has for its object to provide an adjustable rolling bearing for waves, in which with little technological effort round and Stirnlauffehler are almost completely compensated, ie match the geometric with the kinematic axis or a targeted adjustment of any tumbling or eccentricities within the existing Adjustment range can be achieved. According to the invention this object is achieved in an adjustable rolling bearing for waves, in particular a two-point bearing arrangement, with a first and a second rolling bearing, which are provided at a distance along the longitudinal extent of the shaft to be supported and which depending on a fixed housing in the housing outer ring and on the shaft arranged inner ring with balls provided therebetween, wherein the ball raceway surface of each outer ring is a concave spherical surface and the inner ring as a running surface has two Abwälzschultern and by means of adjustment and fastening means on the shaft is adjustable, achieved by each of the inner rings a Assigned to the shaft arranged shaft flange, which has a respective associated inner ring facing conical contact surface, which is in operative connection with a located on the adjacent inner ring spherical adjusting surface, wherein the curvature means Point of the ball raceway surface of the outer ring of the first rolling bearing A with the center of curvature of the spherical alignment surface of the inner ring of the second bearing B at a point M ₁ and the center of curvature of the ball raceway 9 of the outer ring of the second bearing B with the center of curvature of the spherical Justrierfläche the inner ring of the first bearing A. coincide at a point Mj and wherein the two centers of curvature lie on the central axis of the shaft, and that on each of the two shaft flanges in the radial direction acting on the respective inner ring, designed as adjustment screws adjusting elements are provided.

It is advantageous if a shaft flange fixed and the other shaft flange are arranged sprung in the axial direction on the shaft.

The inventive adjustable rolling bearing is achieved with? Em technological effort that quickly and easily for the purpose of producing a high-precision axle bearing 9 match the geometric with the

kinematic axis can be produced. By the presence of. > In the adjustment means on the shaft flanges are under the condition of error reproducibility only small qut dve requirements to be placed on the components used to realize the rolling bearing. Furthermore, this roller bearing offers the possibility within the adjustment range desired eccentric or tumbling motion set at any point of the kinematic axis of rotation targeted. The rolling geometry in the rolling bearings remains constant.

Ausführungsbelsplel

The invention will be explained in more detail below using an exemplary embodiment. In the drawing, a section through a roller bearing according to the invention is shown.

The designed as a two-bearing arrangement adjustable rolling bearing for a shaft 1 comprises a first roller bearing A and a second roller bearing B, which are arranged at a distance in the direction of the longitudinal extent of the shaft 1 to be supported in the housing 2 of the device. The outer rings 3 and 4 of the rolling bearing A and B are firmly installed in the housing 2 and the inner rings 5 and 6 of the rolling bearings A and B are adjacent to the shaft 1 and enclose them with a corresponding game. So you are not sitting directly on the shaft 1. Between the outer rings 3 and 4 and the associated inner rings 5 and β are balls 7; 8 as rolling elements. Each of the outer rings 3 and 4 has a concave spherical ball tread 9 and 10, whose centers of curvature are at a distance from each other on the central axis 11 of the shaft 1 and define the bearing base length 1. The inner rings 5 and 6 each have a running surface for the balls 7; 8 two symmetrically arranged to the ball center Abwälzschultern. Each of the inner rings 5 and β, respectively, is associated with a shaft flange 12 or 13 pushed onto the shaft, each shaft flange 12; 13 a the respective associated inner ring 5 and 6 facing conical contact surface 14; 15 owns. Here are the conical contact surface 14 of the shaft flange 12 with a convex spherical adjustment surface 16 of the inner ring 5 and the conical contact surface 15 of the shaft flange 13 with a convex spherical alignment surface 17 of the inner ring β in operative connection. In the exemplary embodiment is z. B. the shaft flange 12 of the rolling bearing A by means of a screwed onto the shaft 1 mounting nut 18festmitderWelie 1 connected. The shaft flange 13 of the rotor is displaceably arranged on the shaft 1 and is pressed against the inner ring or roller bearing B by resilient elements 19, which rest with their one end on the fastening nut 20. In this way, the frictional connection between the inner rings 5; 6 and their associated shaft flanges 12; 13 produced and ensured the non-positive cohesion of the entire rolling bearing In the installed state.

In order to meet the conditions stated in the task fall in the adjustable rolling bearing center of curvature of the spherical ball raceway 9 of the outer ring 3 of the first bearing A with the center of curvature of the spherical Justierfläche 17 of the inner ring 6 of the bearing B at a point M, and the center of curvature of Spährischen ball raceway 10 of the outer ring 4 of the second bearing B with the center of curvature of the spherical adjustment surface 16 of the inner ring 5 of the first bearing A in a point M ₂ together.

In each of the two shaft flanges 12 and 13 are adjusting screws 21; 22 and fastening screws 23; 24 are provided, which serve to adjust or compensate for eccentricities of rolling bearings. In order to achieve a great sensitivity in the adjustment of the rolling bearing, the adjusting screws 21; 22 also be designed as differential screws.

The actual adjustment of an eccentricity is z. B. about the shaft flange 12 and 13 located adjusting screws 21 and 22. In this case, move along the conical contact surface 14; 15 of the corrugation surface 12; 13 relative to the spährischen Justierflächen 16; 17 of the inner rings 5; 6. At the same time move the balls 7 and 8 of the respective opposite rolling bearing along its spherical ball raceways 9 and 10 of the outer ring 3 or> l by the set angle. During the rotation of the shaft 1, this pendulum motion then occurs constantly. As a result of the common center of curvature of the ball raceway 9 and the adjusting surface 17, the rolling condition is always maintained. The adjustment of eccentricities can take place arbitrarily on the two rolling bearings A and B. Similarly, in the rolling bearing, the geometric with the kinematic axis of rotation can be brought into conformity as far as possible. After adjustment allow the mounting screws 23 and 24 an additional lock.

Claims (2)

1. Adjustable rolling bearing for shafts, in particular a two-point bearing assembly, having a first and a second rolling bearing, which are provided at a distance along the longitudinal extent of the shaft to be supported and which each have a fixed housing in the housing outer ring and an inner ring arranged on the shaft comprising balls provided therebetween, wherein the ball raceway surface of each outer ring is a concave spherical surface and the inner race has two rolling shoulders as a running surface and is adjustable on the shaft by means of adjusting and fastening means, characterized in that each of the inner rings (5, 6) a shaft flange (12; 13) arranged on the shaft (1) is assigned, which has a conical bearing surface (14; 15) facing the respectively assigned internal ring (5; 6) and which is connected to an adjacent inner ring (5; 6) ) is in operative connection with the spherical adjusting surface (16; 17), wherein the Kr Center of the ball bearing surface (9) of the outer ring (3) of the first rolling bearing A with the center of curvature of the spherical alignment surface (17) of the inner ring (4) of the second bearing B at a point M ₁ and the center of curvature of the ball raceway (16) of the outer ring (4 ) of the second rolling bearing B coincide with the center of curvature of the spherical alignment surface (16) of the inner ring (5) of the first rolling bearing A at a point M ₂ and the two centers of curvature lie on the central axis (11) of the track (D) and at each the two shaft flanges (12; 13) acting in the radial direction on the respective inner ring (5; 6), as adjusting screws (21; 22) formed adjusting elements are provided. 2. Rolling bearing according to claim 1, characterized in that a shaft flange (12) fixed and the other shaft flange (13) in the axial direction spring-mounted on the shaft (Dangeordnet are.