SE507343C2 - Rotary bearing device with combined roller and slide bearing - Google Patents

Abstract

The invention relates to a combination of a roller bearing and a sliding bearing, in which the roller bearing is assigned a sliding bearing with a predeterminable or adjustable friction. This bearing combination is suitable, in particular, for mounting steering knuckles and the like on motor vehicles. By means of a spring which pushes the sliding-bearing elements towards one another, it can be achieved with a corresponding spring characteristic that the sliding friction only changes insignificantly, even in the case of wear of the bearing parts.

Description

507 343 serve for vibration damping.

In this context, reference may be made to the publication "Maschinenbautechnik", 5th volume, booklet 4, April 1956, p. 177-187, similar stitch to DE-OS 1 525 146.

Furthermore, it is known in rolling bearings, whose rolling bodies are controlled by holders, to brake these holders slightly by friction during the rotational movements of the bearing to superimpose a sliding movement on the rolling movement of the rolling bodies. Because of this sliding movement is formed between the rolling bodies and these treads a load-bearing lubricant film as at higher speeds counteracts direct contact between the rolling bodies and the running tracks. The rolling elements thus "swim" on a lubricant Film. In this case, the rolling bearing is at a higher speed such as a plain bearing.

In this context, reference can be made to DE-GM 19 32 924 and DE-C 4 64 649.

In addition, combined rolling and sliding bearings are used in them cases where the emerging rotational or relative velocities are low but a bearing consisting exclusively of rolling bearings would exhibit too little friction.

Especially when storing spindle bolts in motor vehicles therefore different combinations of sliding and rolling bearings are known.

For example, the radial bearing of the spindle bolt can mainly take place exclusively by means of rolling bearings while the axial bearing of the spindle bolt is made partly by rolling and partly by plain bearing.

In this context reference should be made to DD-C 1 04 263 as well publications "ATZ Automobiltechnische Zeitschrift" 83 (1981) 12, sid. 631-636, from which it appears that in the above-mentioned use the case of the plain bearing is usually used as the upper thrust bearing.

From DE-A 3 019 857 a similar one is also known for the storage of spindle bolts suitable.combination of rolling and plain bearings, at which the roller bearing is designed as an axial bearing and plain bearing as radial bearing.

In addition, DE-A 3 725 972 discloses a special for rotary storage of machine housings for wind turbines suitable combination of rolling and sliding bearings, at which the rolling bearing is designed 507 343 3 as one suitable for absorbing axial and radial forces ball bearings, on which running rings friction elements are arranged. IN in this context (compare Fig. 4) the device may be such that in the case of a running ring, one is arranged in the direction of the other running ring open V-groove, the width of which can be varied by means of adjusting screws.

This allows a slip ring housed in the V-groove to be tightened more or less strongly towards the second running ring for generating an adjustable frictional force.

The object of the invention is now to propose a particular for the bearing of spindle bolts and the like in motor vehicles suitable combination of rolling and sliding bearings, at which friction the power can be set particularly easily.

This is now achieved according to the invention mainly by the adjustable sliding ring is axially screw-adjustably arranged on one running ring and by means of locking means rotatably lockable relative this running ring and that at the other running ring is rotatable with axially movably attach an opposite sliding ring and arranged to by means of a spring device is pressed against the former the sliding ring.

In this case, the spring device is suitably designed as one disc spring.

Due to this construction, the bearing friction has a light adjustable, reproducible value, which may vary or corrected and even in wear changes only insignificant due to the appropriate characteristics of the spring device.

In addition.can the disc spring as well as also the slider and it opposing slip ring take over the function of a seal of the rolling bearing outwards or as a carrier of a seal.

The invention is described in more detail below with reference to attached drawing showing a sectioned side view of a distribution exemplary embodiment of the device according to the invention.

The rotationally symmetrical bearing device relative to one axis 1 In a manner known for axial ball bearings, the upper has an upper as well also a lower running ring 2 and 3 and in the annular, groove-like the paths of these rings 2 and 3 rotating balls 4.

The lower running ring 3 has a radial outside the running track

Claims (6)

507 343 4 arranged and in cross section for example square ring groove 5 whose open side faces the raceway on the running ring 2. In this annular groove is arranged a suitable annular spring, for example a disc spring 6, which. is pressed. against a sliding ring 7, which is axially displaceable but rotatably arranged on the running ring 3. For this purpose, the sliding ring 7 with external teeth in internal teeth engages in a ring life 8 formed on the running ring 3. Instead, the ring 7 can also have a radial guide pin which engages in an axial groove in the ring 3. On the running ring 2 a rotating but axially displaceable is arranged an opposite sliding ring 9, which is pressed against the sliding ring 7 by means of the disc spring 6. For axial adjustment of the opposite sliding ring 9 at the running ring 2 on its inner circumference a thread which cooperates with a corresponding external thread on the running ring 2. It can be let through locking means (not shown). the opposite sliding ring 9 is fixed in a rotationally fixed manner at the running ring 2 in the currently set axial position. In the case of relative rotations between the running rings 2 and 3, the relatively low rolling friction of the balls 4 in the running tracks and also the adjustable frictional resistance between the sliding ring 7 and the opposing sliding ring 9 must then be overcome. the disc spring 6 and the sliding ring 7 and the opposing sliding ring 9. Patent claim A pivot bearing device with combined rolling and sliding bearing, the sliding bearing of which operates with predetermined or adjustable friction, the rolling bearing having running rings which are separated by means of rolling bodies, and as a sliding bearing an adjustable coaxial sliding ring attached to one running ring. adjustable force against an opposite sliding surface belonging to the other running ring, characterized in that the adjustable sliding ring (9) is arranged axially screw-adjustably arranged on one running ring (2) and by means of locking means rotatably lockable relative to this running ring (2). ) and that an opposing sliding ring (7) is rotatably but axially movably attached to the second running ring (3) and arranged to be pressed against the first-mentioned sliding ring (9) by means of a spring device (6). Device according to claim 1, characterized in that the spring device is an annular disc spring (6). Device according to Claim 1 or 2, characterized in that the spring device (6) has such a spring characteristic that the sliding friction changes only insignificantly when the sliding elements slide against each other. Device according to one of Claims 1 to 3, characterized in that the sliding bearing seals the rolling bearing outwards. Device according to one of Claims 1 to 4, characterized in that the sliding bearing is sealed outwards. Device according to one of Claims 1 to 5, characterized in that the adjustable sliding ring (9) is accessible radially from the outside.