DE7929405U1 - Plain bearings, in particular slide-tilt bearings for bridge structures or the like - Google Patents

Description

The innovation relates to a slide bearing, in particular slide-tilt bearings for bridge structures or the like with a slide plate in
a lower, preferably circular disk-shaped bearing part and a corresponding one
the sliding path larger sliding plate in one
upper bearing part, which is laterally over the

the lower one protrudes, as well as one the upper one -

Covering the sliding plate towards the outside
Edging.

With such plain bearings indifferent, ·;

whether they are used as plain bearings or as slide | Tilt bearings are formed, there is one

building inspection requirement to the effect, t

that a cover of the sliding surfaces for t

the frequently encountered sliding pairing PTFE / ^

Austenitic sheet steel is to be provided. |

For this purpose it is known to use bellows f

to use which adapts to the different |

Overhangs of the upper sliding plate opposite |

k the lower part of the bearing as a result of displacements U

of the bridge structure. Since the- | '

ύ finish the bellows the sliding gap only |

in the area of the perpendicular to the sliding direction
Can cover the end of the bearing parts,
are additional constructive measures for
Covering the sliding gap along the two

other sides parallel to the sliding direction are required.

fcei a well-known construction with a plan the bearing base and rectangular bearing> Upper part, e.g. in the form of a so-called cup sliding bearing, is a sheet metal cover between the inner end strip of each bellows and hern bearing base provided. The exact fit production of such sheet metal blanks is difficult and expensive; they will also Slightly bent during transport and develop in the event of vibrations due to the effect of wind unwanted rattling noises.

fcei another known plain bearing {German utility model 7 045 040) And an upper and a lower bearing part supported by an elastically deformable pad, which carries a sliding plate on the top, on which one with the upper Bearing part connected sliding plate rests. The upper slide plate protrudes considerably «Put the sliding plate of the pad connected to the lower part of the bearing over. Is on its edge All around a cover made of elastic material attached, with its lower side on rests loosely on the lower bearing part. This creates a dust cover for the sliding plates created, however, opposite the sliding surface

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of the pad requires considerably larger dimensions of the bearing parts, which means that the More expensive to manufacture; In addition, the large contact surface brings the border on the substrate with a noticeable increase in the coefficient of sliding friction.

In contrast, the innovation is based on the task of edging on a plain bearing of the type mentioned above using the conventional one in the sliding direction to design effective bellows in such a way that a tight covering of the sliding surfaces is achieved on all sides, whereby the impairment of the sliding properties is to be kept as low as possible.

This object is achieved according to the invention in that the border on each opposite bearing sides

a) at right angles to the sliding direction, one attached between the upper and lower bearing part Bellows and

b) in the sliding direction sealing pad made of elastically flexible material, Which is the space between the bellows and the edge of the bottom Fill in the bearing part, includes.

According to this solution principle, effective dust protection results from a combination of two sealing measures, namely the smooth-running bellows in the sliding direction with one or more sealing pads, preferably made of foamed plastic material, which cover the sliding surfaces on the sides of the bearing running parallel to the sliding direction. A corresponding shape of the sealing pad enables a lateral seal to be adapted to the respective shape of the lower part of the bearing. The latter is round in plan in the case of pot bearings, for example. Matching sealing cushions here have a correspondingly concave inner shape, with their outer edge running in a straight line corresponding to the width of the bellows.

A preferred embodiment provides that the opposite side edges running parallel to the sliding direction the bellows and sealing pads are accommodated in rectified U-shaped guide rails, which are at the top Bearing part fastened and towards the lower bearing part, that is, laterally inwardly open are. The guide rails mentioned not only provide support for the bellows and sealing pads in the

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rich of their margins; they also effect the side sealing of the named components, whereby it is particularly important to cover the protruding areas the upper sliding plate arrives.

The sealing pads are expediently located on the inside of the lower leg of the U-profile. In addition, the sealing pads are with its inner edge exactly the circumferential shape of the lower bearing part = fits and sit on provided side projections.

As part of the innovation, the sealing pads are ring-shaped around the lower bearing part arranged. You can for example be designed as a closed ring; the However, the ring can also be divided into two or four segments along parting lines by the vertical bearing axis.

In order not to hinder _t in the case of a slide-and-tilt bearing di_ tilting movement of the upper bearing part is provided a resilient attachment of the respective bellows to the bearing part, such that a device connected to the bearing lower part capping is kept of each bellows by means of springs in an upwardly open holding device.

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As part of the innovation, the end strip can also be attached directly to the facing end faces of the Sealing pad to be attached. Tilting movements of the bearing are thereby by appropriate Deformation of the sealing pad added.

An exemplary embodiment is explained in more detail below with reference to the drawing. It shows

Fig. 1 is a vertical cross section

by a pot slide bearing with a transverse direction to the sliding direction Cutting plane,

FIG. Z shows a plan view of one half of the pot sliding bearing according to FIG. 1 with the upper bearing part removed,

3 shows a section according to III-III of FIG Fig. 2 and

Fig. 4 is a half of a plan view of the lower bearing part of a pot slide bearing with ring-shaped closed sealing pad.

The pot bearing according to Figures 1 and 2 has a lower bearing part which is pot-shaped in cross section 1 on. On this is an upper bearing part 2, which carries a movable structure,

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supported. The upper bearing part 2 has a polished sliding plate 3, for example made of austenitic sheet steel, on its underside. The upper slide plate 3 slides on a lower slide plate 4, for example made of PTFE. This sliding plate 4 is in a recess in the upper side of a tiltable part supported in the interior of the lower bearing part 1. 5 let in, ^ wiping the underside of the tilting part 5 and the bottom 6 of the pot forming the lower bearing part 1, a pressure pad 7 made of elastomeric material is enclosed, which compensates for tilting movements of the upper bearing part 2 and thus a corresponding inclination of the tilting part 5. A guide rail 8, which has a U-shaped cross section and is open towards the lower bearing part 1, is fastened to opposite side edges of the upper bearing part 2. In this guide rail seal pad 9 are supported, which tightly connected to the peripheral surface of the lower bearing part 1 and with its lower side on the lower leg 10 of the guide rail 8 loosely rest .. Additional, existing on the outside of the lower bearing assembly projections 11 provide a secure support the sealing pad 9 also outside the guide rails 8. The latter also serve as a guide for the side edges of bellows 16, which are arranged folding in between the guide rails in the sliding direction. There is an inner end strip of each bellows on the lower bearing part 1, an outer end strip 13

I ·
I *

• *

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attached to the upper bearing part 2. To compensate for tilting movements of the upper bearing part 2 is the inner end strip 12 movably connected to the lower bearing part 1. For this purpose are at the Outside of the lower bearing part 1, hook-shaped holder 14, which is open at the top, is welded on, in which the terminating strip 12 is held by means of spring force. In the present exemplary embodiment is in the middle between two hooks 14 on the outside of the lower bearing pot 1 one Tension spring 15 attached, which is connected at its other end to the terminating strip 12. By Such a flexible type of attachment of the terminating strip 12 is avoided in the event of tilting movements of the upper bearing part 2 of the bellows 16 is twisted or distorted.

The sealing pads are preferably made of cellular rubber. If the system height is too low on the outside of the lower bearing part 1 is a cell rubber adjoining the outer edge on its upper side

19th

Ringvfoefestigt, e.g. glued, so that a perfect Support of the sealing pad 9 is achieved. Another seal 17 is between an am Perimeter protruding edge 18 of the spherical cap 5 and the top of the lower bearing part 1 are provided, which penetration of dirt into the interior of the lower bearing part 1 forming! Storage pot prevented.

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In the embodiment shown in FIG. 4, instead of the four sealing pads 9 present in FIG. 2, a one-piece sealing pad 21 is provided, which completely encloses the annular lower bearing part 1 and seals on its peripheral surface

is applied. Its vertical support is used on the side circumference of the lower bearing part 1, for example claws 20 projecting at an angle of 45 ° to the sliding direction, as well as those at the top Bearing part attached guide rails 8. The inner end strip of each bellows is directly connected to the annular sealing pad 21, with screws as fastening means / aienen, which are foamed into the sealing pad Threaded sleeves 23 'are screwed in.

Starnberg, October 15, 1979/66364

Claims (7)

Protection claims 1. Plain bearings, in particular slide-tilt bearings for bridge structures or the like. With a Slide plate in a lower, preferably circular disk-shaped bearing part and one corresponding to the sliding path larger sliding plate in an upper bearing part, which protrudes laterally over the lower one, and one the upper sliding plate r> the edging covering the outside, marked by this, that these a *: f are opposite each other Storage sides a) at right angles to the sliding direction, one attached between the upper and lower bearing part * Bellows (16) and b) in the sliding direction sealing pad (9; 2) made of resilient material, which the space between the folds bellows (16) and the edge of the lower s to fill in the bearing part (1). 2. Plain bearing according to claim 1, characterized in that that the parallel to the sliding direction ^: Ί opposite side edges of the folds bellows (16) and sealing pad (9; 21) in rectified U-shaped guide rails (8) are added on the upper bearing part (2) and are open to the lower bearing part (1). 3. Plain bearing according to claim 1 or 2, characterized in that that the Dichturgspolster (9; 21) with its inner edge exactly the circumferential shape of the lower Bearing part (1) are adapted and on provided lateral projections (11; 20) sit. 4. Plain bearing according to one of claims 1 to 3, characterized in that that the sealing pads (9; 21) completely enclose the lower bearing part and vertically stop surfaces running in the direction of sliding for the connection of an end strip (12) of the respective bellows (16). 5. Plain bearing according to claim 4, characterized in that that the sealing pads (21) are combined to form a closed ring. 6. Plain bearing according to one of claims 1 to 5, characterized in that that the end strip (12) of the respective Bellows (16) directly with the sealing pad (s) resting thereon connected is. 7. Plain bearing according to one of claims 1 to with a lower slide plate on one in a preferably circular disk-shaped lower bearing part supported tilting part, characterized, that an end strip (12) of each bellows (16) connected to the lower bearing part (1) is held in an upwardly open holding device (14) by means of springs (15).