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Compensating bearing

Imported: 24 Feb '17 | Published: 06 Jan '04

Peter Tschetschorke

USPTO - Utility Patents

Abstract

A bridge bearing in which a substructure and a superstructure are displaceably connected to each other by means of a sliding bearing, whereby the displacement occurs in a linear and/or cardanic manner in at least one of the directions X, Y, and Z. The bearing is characterized in that a carriage (

7) that is connected to a cover plate (

10) is guided in a linear manner in the X and/or Y direction by two interspaced shafts (

5, 4), respectively, on which displaceable slide bushings (

9, 8) are arranged and/or the cover plate can be guided in a tiltable manner by a pivot bearing (

18) in the Z direction. This combination of a linear and pivot bearing enables all alignment errors arising as a result of finishing inaccuracies, foundation subsidence, desired and undesirable slanting to be compensated and regulates the variations in lengths due to temperature and load.

Claims

1. A bridge bearing adapted to slideably connect a substructure and a superstructure to each other, whereby displacement occurs in a linear and/or cardanic manner in at least one of horizontal X and Y directions and tiltable in a Z direction in a hypothetical three-dimensional coordinate system, the bearing is constructed as an X-, Y-, and Z-bearing comprising a base plate (

2) that has four projecting shaft holders (

3) that are set apart from each other in which two Y-shafts (

4) are held, whereby on each of the Y-shafts (

4) an additional shaft holder (

6) is movably arranged, the additional shaft holders are connected to each other by two X-shafts (

5), and a carriage (

7) is guided on the X and Y shafts (

5,

6) by slide bushings (

9,

8) and can be moved linearly in both the X and Y directions, and the carriage (

7) has a curved shaft disc (

19) thereon that is received in a complementary recess (

20) of a cover plate (

10) connected to the carriage so that the cover plate (

10) can be tilted in the Z-direction by a first pivot bearing (

18) formed by the shaft disc containing the cover plate wherein the Y-shafts (

4) are affixed in the projecting shaft holders (

3) using mounting caps (

11), each of which are pressed against the respective projecting shaft holder (

3) with a mounting bolt (

12) that is located in facing ends of the Y-shafts (

4).

2. The bridge bearing according to claim 1, characterized in that the slide bushings (

8,

9) are maintenance-free cylindrical slide bushings formed of Teflon.

3. The bridge bearing according to claim 1, characterized in that the X-shafts (

5) each have a curved recess on opposite ends thereof, into which the Y-shafts (

4) are set.

4. The bridge bearing according to claim 1, characterized in that the base plate (

2) has in a middle part thereof a supporting projection (

13) that projects in a direction of the cover plate (

10) and is contacted by a lower side of the carriage (

7) in an unloaded condition.

5. The bridge bearing according to claim 1, characterized in that the X and/or Y shafts (

5,

4) have a deflection in a direction of the cover plate (

10).

6. The bridge bearing according to claim 1, characterized in that the carriage (

7) has in a middle part thereof a hole (

14) extending therethrough that is provided with a shoulder, into which a second pivot bearing (

15) is set and is held via a mounting bolt (

17) that is inserted into the cover plate (

10), whereby in an area of a journal (

23) of the carriage (

7), a gap is formed between the mounting bolt (

17) and the hole (

14).

7. The bridge bearing according to claim 6, characterized in that the first and the second pivot bearings (

18,

15) have a common spherical center.

8. The bridge bearing according to claim 6, characterized in that first and the second pivot bearings (

18,

15) are constructed as maintenance-free axial pivot bearings, radial pivot bearings, or inclined pivot bearings formed of Teflon.