A high-durability rubber bearing

Abstract

The utility model discloses a high-durability rubber bearing, comprising an upper steel plate and a lower steel plate, a rubber body arranged between the upper steel plate and the lower steel plate, and an embedded steel plate arranged in the rubber body; the upper steel plate and the lower steel plate are arranged relatively parallel, and are arranged coaxially in the vertical direction; the embedded steel plate comprises a longitudinal steel plate, a transverse steel plate and a plane steel plate, and the longitudinal steel plate and the transverse steel plate are arranged in parallel in an alternating manner. When the rubber bearing is displaced, the displacement is dispersed to the plane where all the steel plates of the rubber bearing are located, so as to avoid excessive displacement of the rubber bearing locally, which exceeds the recovery limit of the rubber and makes the recovery performance of the bearing invalid; and when facing a large displacement of the bridge, the displacement of the rubber bearing is limited to prevent the bearing from slipping due to excessive displacement, and even cause the occurrence of beam falling, thereby enhancing the safety and stability of the bearing.

Description

Technical Field

[0001] The embodiments of the utility model belong to the technical field of bridge bearings, and more specifically, relate to a high-durability rubber bearing. Background Art

[0002] In a bridge, the bridge piers and T-beams need to be connected by bearings to cope with the displacement of the bridge caused by strong winds and vehicle vibrations, and to provide restoring force for the displacement of the bridge. Currently, the commonly used bridge bearings include rubber bearings, which are made of multiple layers of natural rubber and steel plates embedded, bonded, and vulcanized. They can reliably transmit the pressure of the upper structure to the pier, have good elasticity to adapt to the rotation of the beam end, and have large shear deformation to meet the horizontal displacement of the upper structure.

[0003] At present, the rubber bearings on the market use a limit structure to limit the displacement of the bearings. The Chinese patent with the publication number CN208219392U discloses an anti-slip rubber bearing structure, which is provided by relatively setting an upper steel plate and a lower steel plate corresponding to the upper and lower end surfaces of the rubber bearing, and correspondingly opening a first groove and a second groove on the opposite surfaces of the two steel plates, so that the upper and lower ends of the rubber bearing can be respectively embedded in the two grooves, and the horizontal sliding of the rubber bearing is limited by the side walls of the two grooves, and then by firmly connecting the upper steel plate and the lower steel plate, a structurally stable and anti-slip rubber bearing structure can be formed. It has a simple structure, is easy to set up, has strong structural stability and versatility, can greatly improve the setting efficiency of the rubber bearing structure, shorten the construction period, and reduce the setting cost of the bearing structure.

[0004] However, the Chinese patent with publication number CN208219392U, when the bridge has a large displacement, will cause the bearing to have a large deformation. Due to the large deformation, it will exceed the recovery limit of the bearing, thus causing the bearing to fail. In addition, in daily use, there may be uneven displacement between different steel plate layers. If this state is maintained for a long time, some rubber will age faster, thus affecting the service life of the bearing. Therefore, a high-durability rubber bearing is needed to reduce the aging speed of rubber and improve its durability. Utility Model Content

[0005] In view of the above defects or improvement needs of the prior art, the utility model provides a high-durability rubber bearing. A rubber body with an embedded steel plate is sandwiched between the upper steel plate and the lower steel plate, and the embedded steel plate is used to improve the rigidity and stability of the rubber body, enhance its ability to resist vertical loads, and effectively limit the lateral expansion of the rubber when subjected to horizontal forces, thereby controlling the lateral deformation of the rubber and increasing the lateral rigidity of the bearing.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a high-durability rubber bearing, comprising an upper steel plate and a lower steel plate, a rubber body disposed between the upper steel plate and the lower steel plate, and an embedded steel plate disposed in the rubber body;

[0007] The upper steel plate and the lower steel plate are arranged relatively parallel and vertically coaxially parallel;

[0008] The embedded steel plates include longitudinal steel plates, transverse steel plates and plane steel plates, and the longitudinal steel plates and transverse steel plates are arranged in parallel and staggered manner.

[0009] Furthermore, the main body of the longitudinal steel plate is a square plate structure with a flat surface and an inclined surface extending downward at both ends. A baffle extends vertically from the bottom of the inclined surface, and the width of the baffle is the same as the thickness of the main body of the longitudinal steel plate.

[0010] Furthermore, the structure of the transverse steel plate is the same as that of the longitudinal steel plate.

[0011] Furthermore, the two ends of the longitudinal steel plate with the inclined surface and the two ends of the transverse steel plate with the inclined surface are arranged perpendicular to each other;

[0012] The baffle of the longitudinal steel plate and the side surface of the main part of the transverse steel plate arranged thereunder are arranged in the same horizontal plane, and the baffle of the longitudinal steel plate and the side surface of the main part of the transverse steel plate arranged thereunder are kept at a certain distance;

[0013] The baffle of the transverse steel plate and the side surface of the main part of the longitudinal steel plate arranged thereunder are arranged in the same horizontal plane, and the baffle of the transverse steel plate and the side surface of the main part of the longitudinal steel plate arranged thereunder maintain a certain distance.

[0014] Furthermore, the flat steel plate is only provided with a main body portion, without an inclined surface and a baffle;

[0015] The main part of the planar steel plate is the same as the main part of the longitudinal steel plate.

[0016] Furthermore, when the longitudinal steel plate and the transverse steel plate have the inclined plate on one side facing upward, the flat steel plate is arranged on the uppermost layer of the embedded steel plate;

[0017] When the longitudinal steel plate and the transverse steel plate have one side with the inclined plate facing downward, the flat steel plate is arranged at the bottom layer of the embedded steel plate.

[0018] Furthermore, the main parts of the longitudinal steel plate, the transverse steel plate and the planar steel plate are all provided with a plurality of connection holes to form a connection hole array.

[0019] Furthermore, the rubber of the rubber body is filled in the gaps between the longitudinal steel plate, the transverse steel plate and the planar steel plate, and the rubber in the gaps is connected as a whole through the connection hole array of the three and the periphery of the three.

[0020] Furthermore, a groove is provided on the bottom surface of the upper steel plate, the shape of the groove is the same as the cross section of the rubber body, and the groove is provided at the center position of the upper steel plate;

[0021] The top surface of the lower steel plate is provided with a groove, the shape of the groove is the same as the groove on the bottom surface of the upper steel plate, and the groove is arranged at the center position of the lower steel plate.

[0022] Furthermore, the four corners of the lower steel plate are provided with mounting holes for fixing it to the bridge pier using anchor bolts;

[0023] The four corners of the upper steel plate are also provided with mounting holes for fixing it to the T-beam using anchor bolts.

[0024] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0025] 1. The utility model provides a high-durability rubber bearing, in which the baffles of the longitudinal steel plate and the transverse steel plate are in contact with the side surfaces of the adjacent longitudinal steel plate or transverse steel plate or plane steel plate, thereby driving a part of the rubber on the plane where the longitudinal steel plate or the transverse steel plate or the plane steel plate is located to undergo horizontal displacement. An interlocking effect is generated among the three, so that when the rubber bearing is displaced, the displacement is dispersed to the plane where all the steel plates of the rubber bearing are located, thereby avoiding excessive displacement of the rubber bearing locally, exceeding the recovery limit of the rubber, and rendering the recovery performance of the bearing invalid. In addition, when facing a large displacement of the bridge, the displacement of the rubber bearing is limited to prevent the bearing from slipping due to excessive displacement, or even causing a beam fall, thereby enhancing the safety and stability of the bearing.

[0026] 2. The utility model provides a high-durability rubber bearing, which sandwiches a rubber body with an embedded steel plate between an upper steel plate and a lower steel plate. The embedded steel plate is used to improve the rigidity and stability of the rubber body, thereby enhancing its ability to resist vertical loads and effectively limiting the lateral expansion of the rubber when subjected to horizontal forces, thereby controlling the lateral deformation of the rubber and increasing the lateral rigidity of the bearing.

[0027] 3. The utility model provides a high-durability rubber bearing, in which the rubber of the rubber body is filled in the gaps between the longitudinal steel plate, the transverse steel plate and the plane steel plate, and the rubber in the gaps is connected as a whole through an array of connecting holes of the three and the surroundings of the three, and the rubber body is connected to the connecting holes of the embedded steel plate, thereby increasing the connection points between the various parts of the rubber and enhancing the restoring force of the rubber bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a high-durability rubber bearing according to an embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the overall structure of a high-durability rubber bearing according to an embodiment of the utility model;

[0030] Figure 3 This is a front view of a high-durability rubber bearing according to an embodiment of the utility model;

[0031] Figure 4 This is a schematic diagram of the AA surface of a high-durability rubber bearing according to an embodiment of the utility model;

[0032] Figure 5 This is a BB surface schematic diagram of a high-durability rubber bearing according to an embodiment of the utility model;

[0033] Figure 6 This is a CC plane schematic diagram of a high-durability rubber bearing according to an embodiment of the utility model;

[0034] Figure 7 This is a schematic diagram of the structure of an embedded steel plate of a high-durability rubber bearing according to an embodiment of the utility model;

[0035] Figure 8 This is a schematic diagram of the overall structure of an embedded steel plate of a high-durability rubber bearing according to an embodiment of the utility model;

[0036] Fig. 9 This is a schematic diagram of detection data of a high-durability rubber bearing according to an embodiment of the utility model.

[0037] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-upper steel plate, 2-lower steel plate, 3-rubber body, 4-embedded steel plate, 41-longitudinal steel plate, 42-transverse steel plate, 43-flat steel plate. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0039] like Figure 1-3As shown, the embodiment of the utility model provides a high-durability rubber bearing, including an upper steel plate 1 and a lower steel plate 2 arranged opposite to each other, a rubber body 3 arranged between the upper steel plate 1 and the lower steel plate 2, and an embedded steel plate 4 embedded in the rubber body 3. By sandwiching the rubber body 3 with an embedded steel plate between the upper steel plate 1 and the lower steel plate 2, the embedded steel plate 4 is used to improve the rigidity and stability of the rubber body 3, enhance its ability to resist vertical loads, effectively limit the lateral expansion of the rubber when subjected to horizontal forces, thereby controlling the lateral deformation of the rubber and increasing the lateral rigidity of the bearing.

[0040] The bottom surface of the upper steel plate 1 is provided with a groove, the shape of which is the same as the cross section of the rubber body 3, and the groove is arranged at the center of the upper steel plate 1. The top surface of the lower steel plate 2 is provided with a groove, the shape of which is the same as the groove on the bottom surface of the upper steel plate 1, and the groove is arranged at the center of the lower steel plate 2. The upper steel plate 1 and the lower steel plate 2 are arranged opposite to each other with the grooved sides.

[0041] Preferably, the upper steel plate 1 and the lower steel plate 2 are arranged coaxially and parallel in the vertical direction, and the two steel plates have the same size, or the upper steel plate 1 is larger than the lower steel plate 2, or the lower steel plate 2 is larger than the upper steel plate 1. The upper steel plate 1 and the lower steel plate 2 are square in shape, or circular, elliptical or polygonal, as long as they can dig out a groove with the same size as the cross-sectional shape of the rubber body 3.

[0042] The four corners of the lower steel plate 2 are provided with mounting holes for fixing it to the bridge pier using anchor bolts. The four corners of the upper steel plate 1 are also provided with mounting holes for fixing it to the T beam using anchor bolts. This prevents relative displacement between the steel plates at both ends and the bridge pier or T beam during use of the bearing.

[0043] The bottom of the rubber body 3 is arranged in the groove on the top surface of the lower steel plate 2, and the top is arranged in the groove on the bottom surface of the upper steel plate 1. The grooves of the lower steel plate 2 and the upper steel plate 1 limit the rubber body 3, so that the upper and lower ends of the rubber body 3 cannot move or rotate in the grooves of the two steel plates, thereby fixing the rubber bearing, ensuring that it maintains good restoring force, and improving the stability and versatility of the rubber bearing.

[0044] like Figure 4-6 As shown, the embedded steel plate 4 is horizontally embedded in the rubber body 3, and includes a longitudinal steel plate 41 and a transverse steel plate 42. The main part of the longitudinal steel plate 41 is a square plate structure, with a flat surface, and an inclined surface extending downward at both ends. A baffle extends vertically from the bottom of the inclined surface, and the width of the baffle is the same as the thickness of the main part of the longitudinal steel plate 41. The structure of the transverse steel plate 42 is the same as that of the longitudinal steel plate 41. The main parts of the transverse steel plate 42 and the longitudinal steel plate 41 are both provided with a plurality of connection holes to form a connection hole array.

[0045] Preferably, the longitudinal steel plates 41 and the transverse steel plates 42 are arranged in parallel and staggered inside the rubber body 3, and the two ends of the longitudinal steel plates 41 with the inclined surfaces are perpendicular to each other. The baffle of the longitudinal steel plate 41 and the side of the main part of the transverse steel plate 42 arranged below it are arranged in the same horizontal plane, and the baffle of the longitudinal steel plate 41 and the side of the main part of the transverse steel plate 42 arranged below it are kept at a certain distance. The baffle of the transverse steel plate 42 and the side of the main part of the longitudinal steel plate 41 arranged below it are arranged in the same horizontal plane, and the baffle of the transverse steel plate 42 and the side of the main part of the longitudinal steel plate 41 arranged below it are kept at a certain distance.

[0046] The main body of the planar steel plate 43 is the same as the main body of the longitudinal steel plate 41, and the planar steel plate 43 is only provided with the main body, without the inclined surface and the baffle. The planar steel plate 43 is arranged at the top or bottom of the rubber body 3, and only one piece is provided, and the two ends are arranged in the same horizontal plane as the baffles of the longitudinal steel plate 41 or the transverse steel plate 42. The planar steel plate 43 is also provided with a plurality of connection holes to form a connection hole array.

[0047] Preferably, when the side with the inclined plate of the longitudinal steel plate 41 and the transverse steel plate 42 faces upward, the flat steel plate 43 is arranged at the top layer of the embedded steel plate 4. When the side with the inclined plate of the longitudinal steel plate 41 and the transverse steel plate 42 faces downward, the flat steel plate 43 is arranged at the bottom layer of the embedded steel plate 4.

[0048] When the rubber bearing undergoes horizontal displacement, the baffles of the longitudinal steel plate 41 and the transverse steel plate 42 contact the side of the adjacent longitudinal steel plate 41 or transverse steel plate 42 or plane steel plate 43, driving the part of the rubber on the plane where the longitudinal steel plate 41 or transverse steel plate 42 or plane steel plate 43 is located to undergo horizontal displacement. An interlocking effect is generated between the three, so that when the rubber bearing is displaced, the displacement is dispersed to the plane where all the steel plates of the rubber bearing are located, avoiding excessive displacement of the rubber bearing locally, exceeding the recovery limit of the rubber, and rendering the recovery performance of the bearing ineffective. In addition, when facing a large displacement of the bridge, the displacement of the rubber bearing is limited to prevent the bearing from slipping due to excessive displacement, or even causing the beam to fall, thereby enhancing the safety and stability of the bearing.

[0049] The rubber of the rubber body 3 is filled in the gaps between the longitudinal steel plate 41, the transverse steel plate 42 and the plane steel plate 43, and the rubber in the gaps is connected as a whole through the connection hole array of the three and the surroundings of the three. The rubber body 3 is connected to the connection holes of the embedded steel plate 4, which increases the connection points between the rubber parts and enhances the restoring force of the rubber support.

[0050] like Fig. 9As shown, the rubber used in the rubber body 3 is a composite rubber mixed with natural rubber and EPDM rubber. Natural rubber has good process performance, high tensile strength (tensile strength can reach 17.5MPa), elongation at break (elongation at break can reach 450%), and high temperature stability, but poor ozone aging resistance. EPDM rubber is a copolymer of ethylene, propylene and a small amount of non-conjugated dienes, a type of ethylene-propylene rubber, and its main chain is composed of chemically stable saturated hydrocarbons, and only contains unsaturated double bonds in the side chains, so it has excellent ozone resistance, heat resistance, weather resistance and other aging resistance. The main purpose of using natural rubber and EPDM rubber together is to improve the ozone resistance and weather aging resistance of natural rubber.

[0051] The composite rubber raw material used in the rubber body 3 has the following properties: ① Ozone aging resistance: when the elongation is 20%, the ozone concentration is 200pphm, and the test temperature is 40°C×384h, there is no crack on the surface of the sample; ② Hot air aging resistance: after 70°C×1008h, the hardness changes by 0~+10, the maximum change rate of tensile strength is -15%, and the maximum change rate of elongation at break is -20%.

[0052] This rubber bearing has the following properties: ① Heat-resistant air aging performance: after 70℃×288h, the shear elastic modulus change value is less than ±0.15MPa; ② The bearing mechanical performance indicators meet the relevant requirements of "Highway Bridge Plate Rubber Bearing" (JT / T4-2019);

[0053] The composite rubber used in the rubber body 3 has better compressive elastic modulus, shear elastic modulus and ozone aging resistance than natural rubber and chloroprene rubber.

[0054] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-durability rubber bearing, characterized in that: It comprises an upper steel plate (1) and a lower steel plate (2), a rubber body (3) arranged between the upper steel plate (1) and the lower steel plate (2), and an embedded steel plate (4) arranged in the rubber body (3); The upper steel plate (1) and the lower steel plate (2) are arranged relatively parallel to each other and are arranged coaxially in parallel in the vertical direction; The embedded steel plate (4) comprises a longitudinal steel plate (41), a transverse steel plate (42) and a plane steel plate (43), wherein the longitudinal steel plate (41) and the transverse steel plate (42) are arranged in an alternating and parallel manner.

2. A high-durability rubber bearing according to claim 1, characterized in that: The main body of the longitudinal steel plate (41) is a square plate structure with a flat surface. Both ends of the longitudinal steel plate have an inclined surface extending downward. A baffle extends vertically from the bottom of the inclined surface. The width of the baffle is the same as the thickness of the main body of the longitudinal steel plate (41).

3. A high-durability rubber bearing according to claim 2, characterized in that: The structure of the transverse steel plate (42) is the same as that of the longitudinal steel plate (41).

4. A high-durability rubber bearing according to claim 3, characterized in that: The two ends of the longitudinal steel plate (41) with the inclined surfaces and the two ends of the transverse steel plate (42) with the inclined surfaces are arranged perpendicular to each other; The baffle of the longitudinal steel plate (41) and the side surface of the main part of the transverse steel plate (42) arranged thereunder are arranged in the same horizontal plane, and a certain distance is maintained between the baffle of the longitudinal steel plate (41) and the side surface of the main part of the transverse steel plate (42) arranged thereunder; The baffle of the transverse steel plate (42) and the side surface of the main part of the longitudinal steel plate (41) arranged thereunder are arranged in the same horizontal plane, and a certain distance is maintained between the baffle of the transverse steel plate (42) and the side surface of the main part of the longitudinal steel plate (41) arranged thereunder.

5. The high-durability rubber bearing according to claim 3, characterized in that: The flat steel plate (43) is only provided with a main body portion, without an inclined surface or a baffle; The main part of the planar steel plate (43) is the same as the main part of the longitudinal steel plate (41).

6. A high-durability rubber bearing according to claim 5, characterized in that: When the longitudinal steel plate (41) and the transverse steel plate (42) have the inclined plate side facing upward, the flat steel plate (43) is arranged on the uppermost layer of the embedded steel plate (4); When the longitudinal steel plate (41) and the transverse steel plate (42) have the inclined plate side facing downward, the flat steel plate (43) is arranged at the bottom layer of the embedded steel plate (4).

7. A high-durability rubber bearing according to any one of claims 1-6, characterized in that: The main parts of the longitudinal steel plate (41), the transverse steel plate (42) and the plane steel plate (43) are all provided with a plurality of connection holes to form a connection hole array.

8. The high-durability rubber bearing according to claim 7, characterized in that: The rubber of the rubber body (3) is filled in the gaps between the longitudinal steel plate (41), the transverse steel plate (42) and the plane steel plate (43), and the rubber in the gaps is connected as a whole through the connection hole array of the three and the periphery of the three.

9. A high-durability rubber bearing according to any one of claims 1-6, characterized in that: The bottom surface of the upper steel plate (1) is provided with a groove, the shape of the groove is the same as the cross section of the rubber body (3), and the groove is arranged at the center position of the upper steel plate (1), and the top of the rubber body (3) is arranged in the groove; The top surface of the lower steel plate (2) is also provided with a groove, the shape of which is the same as the groove on the bottom surface of the upper steel plate (1), and the groove is arranged at the center position of the lower steel plate (2), and the bottom of the rubber body (3) is arranged in the groove.

10. The high-durability rubber bearing according to claim 9, characterized in that: The four corners of the lower steel plate (2) are provided with mounting holes for fixing it to the bridge pier using anchor bolts; The four corners of the upper steel plate (1) are also provided with mounting holes for fixing it to the T-beam using anchor bolts.

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