Non-rotating simplified bridge bearing based on pot bearing

Abstract

The utility model relates to bridge support technical field, and disclose based on basin type support non-rotation simplified type bridge support, including, basin type base, the middle part is provided with inner groove, piston, set up in the inner groove, its top is provided with recess, its side surface is provided with lubricated copper alloy, PTFE board, the recess is adapted to be equipped in, guide rod, is located in the outer surface place of sleeve setting in piston, sliding plate, set up in the top of guide rod, the bottom of sliding plate is provided with slide piece, the slide piece is n shape, and is stainless steel material, slide piece outer surface and guide rod one side towards piston link, its inner surface and lubricated copper alloy contact movement, the bottom of slide piece and PTFE board of piston top opposite cooperation form the stress structure of relatively sliding. The utility model provides based on basin type support non-rotation simplified type bridge support, through the synergetic effect of basin type base, piston, lubricated copper alloy, PTFE board, guide rod, sliding plate and stainless steel slide piece, has realized the integration of bearing and low friction sliding.

Description

Technical Field

[0001] This utility model relates to the field of bridge bearing technology, specifically to a simplified bridge bearing based on a pot bearing without rotation. Background Technology

[0002] In existing bridge engineering, bearings, as crucial components connecting the superstructure and substructure, directly affect the stress transmission and durability of the bridge. Common bridge bearings include plate rubber bearings, pot bearings, and spherical bearings. Among them, pot bearings are widely used in long-span and heavy-load bridge structures due to their high load-bearing capacity, good rotational performance, and adaptability to complex working conditions. However, traditional pot bearings typically rely on the compression deformation of the rubber plate within the pot cavity to achieve rotation. If rubber aging, stress concentration, or rotational obstruction occurs during long-term use, it can easily lead to bearing performance degradation, resulting in abnormal stress on the bridge structure. Furthermore, some existing bearing structures, under complex working conditions such as temperature deformation, earthquakes, or braking forces, do not release horizontal displacement effectively, easily generating excessive horizontal internal forces, thereby accelerating wear between the beam ends and the bearings and shortening their service life.

[0003] To improve the adaptability to horizontal displacement, existing technologies have introduced a sliding pair composed of polytetrafluoroethylene (PTFE) and stainless steel plates into pot bearings to achieve low-resistance sliding by utilizing the extremely low coefficient of friction of PTFE. However, existing solutions generally suffer from problems such as low structural integration, uneven stress on the sliding pair, and insufficient guiding constraints. Under high loads and frequent displacements, the PTFE plates may warp or detach, and the frictional resistance increases when lubrication conditions deteriorate, leading to unstable bearing operation. At the same time, some bearings lack reasonable design in terms of piston guidance and anti-displacement, making them prone to tilting and lateral displacement under stress, affecting the overall load-bearing capacity and service life.

[0004] In view of the above, this application proposes a simplified bridge bearing based on pot bearing without rotation to solve the problem of horizontal free sliding while ensuring vertical load bearing capacity, reducing friction and wear, and improving the adaptability and durability of the bearing under complex working conditions such as temperature deformation, earthquakes and braking. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a simplified bridge bearing based on pot bearings without rotation, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] Simplified bridge bearings based on pot bearings with no rotation include,

[0008] The basin-shaped base has an inner groove in the middle;

[0009] The piston is set in the inner groove, with a groove on its top and a lubricating copper alloy on its side surface;

[0010] PTFE sheet, fitted into the groove;

[0011] The guide rod is located on the outer surface of the piston.

[0012] A sliding plate is disposed at the top of the guide rod, and a sliding piece is disposed at the bottom of the sliding plate. The sliding piece is n-shaped and made of stainless steel. The outer surface of the sliding piece is connected to the side of the guide rod facing the piston, and its inner surface is in contact with the lubricating copper alloy. The bottom of the sliding piece and the PTFE plate at the top of the piston cooperate to form a force-bearing structure that can slide relative to each other.

[0013] Optionally, the piston may be made entirely of carbon steel.

[0014] Optionally, the height of the piston is greater than the height of the basin-shaped base.

[0015] Optionally, a lifting ring for transportation is provided in the middle of the surface of the sliding plate.

[0016] Optionally, a first high-strength bolt is provided at both edges of the basin-shaped base, and a second high-strength bolt is provided on the sliding plate.

[0017] Optionally, temporary fixing components are provided on both sides of the sliding plate. The temporary fixing components include a connecting shaft and a connecting rod. The connecting shaft is disposed on the sliding plate, and the connecting rod is disposed through the connecting shaft, with its bottom contacting the upper surface of the basin-shaped base.

[0018] Optionally, the PTFE plate surface is coated with silicone grease.

[0019] Optionally, there is a gap between the piston and the sliding plate. Half of the PTFE plate is disposed inside the groove, and the other half is disposed outside the groove. The PTFE plate disposed outside the groove is adapted to the size of the gap and makes uniform contact with the bottom of the sliding plate.

[0020] This utility model provides a simplified bridge bearing based on a pot bearing with no rotation, which has the following advantages:

[0021] 1. This utility model provides a simplified bridge bearing based on a pot bearing with no rotation. Through the synergistic action of the pot base, piston, lubricating copper alloy, PTFE plate, guide rod, sliding plate, and stainless steel sliding plate, it achieves integrated load-bearing and low-friction sliding. The piston and pot base bear the vertical load, while the PTFE plate and stainless steel sliding plate form a low-friction sliding pair, ensuring free release of horizontal displacement and avoiding internal force concentration. The lubricating copper alloy guides the sliding plate, reducing wear and improving durability. The guide rod constrains the vertical movement of the piston, preventing deviation. The n-shaped sliding plate enhances resistance to deformation. The carbon steel piston balances strength and economy. The partially embedded and extended PTFE plate arrangement ensures uniform contact and interface stability. The overall structure possesses load-bearing, impact-resistant, low-friction, and wear-resistant characteristics, adapting to complex working conditions such as temperature deformation, earthquakes, and braking forces, significantly improving the reliability and service life of the bearing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] In the diagram: 1. Basin-shaped base; 2. Inner groove; 3. Piston; 4. Groove; 5. Lubricating copper alloy; 6. PTFE plate; 7. Guide rod; 8. Sliding plate; 9. Sliding piece; 10. Mounting ring; 11. First high-strength bolt; 12. Second high-strength bolt; 13. Temporary fixing assembly; 131. Connecting shaft; 132. Connecting rod. Detailed Implementation

[0024] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] In the description of this utility model, it should be understood that the terms "lateral", "longitudinal", "end", "edge", "sidewall", "upper", "lower", "upper part", "lower part", "directly above", "surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "end", "head", "tail", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] This application proposes a simplified bridge bearing based on pot bearings without rotation, as detailed below:

[0027] For reference Figure 1This application achieves integrated load-bearing and low-friction sliding through the synergistic action of the basin-type base 1, piston 3, lubricating copper alloy 5, PTFE plate 6, guide rod 7, sliding plate 8 and sliding piece 9.

[0028] For reference Figure 1 The basin-shaped base 1 has an inner groove 2 in the middle, and the size of the inner groove 2 is adapted to the installation of the piston 3.

[0029] Furthermore, a first high-strength bolt 11 is provided at both edges of the pot-shaped base 1, and a second high-strength bolt 12 is provided on the sliding plate 8; the first high-strength bolt 11 is used to reliably anchor the pot-shaped base 1 to the substructure of the bridge (such as the pier top or cap beam) to ensure a stable connection between the support and the substructure; the second high-strength bolt 12 is used to firmly connect the sliding plate 8 to the beam or superstructure to ensure that the load can be smoothly transferred; this connection is a common existing technical means, and this application will not elaborate on it further.

[0030] For reference Figure 1 The piston 3 is installed in the inner groove 2, and its side surface is provided with a lubricating copper alloy 5 to improve guidance and wear resistance. A groove 4 is opened on the top of the piston 3, and the PTFE plate 6 is embedded in the groove 4 to form a low friction contact interface with the sliding plate.

[0031] Furthermore, the PTFE plate 6 is a key sliding element. Its bonding must be firm, flat, and free of air bubbles. The surface must be cleaned and coated with special silicone grease (5201-2 silicone grease is selected) to reduce the coefficient of friction. The PTFE plate 6 has an extremely low coefficient of friction (especially after applying silicone grease, the dynamic coefficient of friction can be as low as about 0.03).

[0032] Furthermore, piston 3 is made entirely of carbon steel. The selection of this material ensures that piston 3 has strong load-bearing capacity, impact resistance, and stable fit under high loads and complex working conditions, while also taking into account processing economy and durability.

[0033] Furthermore, the height of piston 3 is greater than the height of basin base 1, which facilitates the installation of subsequent structures such as guide rod 7.

[0034] For reference Figure 1 The guide rod 7 is located on the outer surface of the piston 3. The main purpose of the guide rod 7 is to constrain the movement direction of the piston 3, ensuring that the piston 3 slides smoothly in the inner groove 2 along a predetermined direction (usually vertical), and preventing the piston from shifting or tilting laterally when subjected to force. At the same time, the guide rod 7 can also withstand part of the lateral force, reduce the wear between the piston and the inner groove or the lubricating copper alloy, and improve the overall guiding accuracy and service life of the support.

[0035] For reference Figure 1The sliding plate 8 is located on the top of the guide rod 7, and a stainless steel sliding plate 9 with an n-shaped structure is fixed at its bottom. The outer surface of the sliding plate 9 is connected to the side of the guide rod 7 facing the piston 3, and its inner surface is in contact with the lubricating copper alloy 5 on the side wall of the piston 3 to achieve guiding sliding. At the same time, the bottom of the sliding plate 9 is in relative cooperation with the PTFE plate 6 on the top of the piston 3 to form a low-friction sliding pair.

[0036] Furthermore, the contact between the sliding vane 9 and the lubricating copper alloy 5 ensures the stable guidance of the piston 3 under the constraint of the guide rod 7, preventing deviation and tilting. The sliding vane 9 cooperates with the PTFE plate 6, contacting each other and forming a pair of relatively sliding friction pairs. This results in an extremely low coefficient of friction when subjected to horizontal displacement, effectively releasing horizontal forces. The n-shaped stainless steel sliding vane 9 structure enhances overall rigidity and resistance to deformation. Combined with the lubricating copper alloy and PTFE materials, it significantly reduces wear and extends the service life of the support. Thus, it can withstand vertical loads while allowing free horizontal sliding, improving the support's adaptability to temperature deformation, earthquakes, and braking forces.

[0037] Furthermore, a lifting ring 10 for transportation is provided in the middle of the surface of the sliding plate 8. Its main function is to provide a reliable lifting connection point during the manufacturing, transportation and on-site installation of the support, so as to facilitate the overall lifting, positioning and placement operations. This can avoid structural damage caused by directly clamping or supporting the support body, improve construction efficiency and safety, and at the same time ensure the stability and integrity of the support during transportation and installation.

[0038] Furthermore, an installation gap is provided between the piston 3 and the sliding plate 8. A portion (half) of the PTFE plate 6 is embedded in the groove 4 on the top of the piston 3, and the other portion extends outside the groove 4. The PTFE plate 6 extending outside the groove 4 is adapted to the size of the gap and forms uniform contact with the bottom of the sliding plate 9, thereby forming a stable low-friction sliding interface.

[0039] In this invention, the working steps of the device are as follows:

[0040] The basin-type base 1 is fixed to the substructure of the bridge by a first high-strength bolt 11, and the sliding plate 8 is reliably connected to the beam by a second high-strength bolt 12 to realize the vertical transfer of load. The piston 3 is installed in the inner groove 2 of the basin-type base 1, and its outer surface is guided by the inner surface of the lubricating copper alloy 5 and the stainless steel sliding plate 9 to ensure that the piston 3 moves smoothly in a predetermined direction under vertical force. A PTFE plate 6 is embedded in the groove 4 at the top of the piston 3, and the outer extension of the PTFE plate 6 is in uniform contact with the bottom of the sliding plate 9 to form a low-friction sliding plate. In the dynamic pair, when the beam undergoes horizontal displacement due to temperature changes, braking force, or seismic action, the PTFE plate 6 and the stainless steel sliding plate 9 slide relative to each other to release the horizontal force and prevent excessive internal forces at the beam ends and supports. Simultaneously, the guide rod 7 is sleeved on the outer surface of the piston 3, providing directional constraint to prevent lateral displacement or tilting under load, ensuring stress stability. The transport and installation lifting ring 10 is located in the middle of the sliding plate 8, serving as a lifting connection point during support hoisting, transportation, and on-site installation, ensuring the reliability and safety of the overall installation. Therefore, while bearing vertical loads, the support can flexibly adapt to horizontal displacement, balancing load-bearing, guiding, and anti-displacement functions, thus improving the adaptability and durability of the bridge structure under complex working conditions.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A non-rotating simplified type bridge bearing based on a pot bearing, characterized in that: include, A basin-shaped base (1) with an inner groove (2) in the middle; Piston (3) is set in inner groove (2), with groove (4) on its top and lubricating copper alloy (5) on its side surface. PTFE plate (6) is fitted into groove (4); The guide rod (7) is located on the outer surface of the piston (3); A sliding plate (8) is set on the top of the guide rod (7). A sliding piece (9) is set at the bottom of the sliding plate (8). The sliding piece (9) is n-shaped and made of stainless steel. The outer surface of the sliding piece (9) is connected to the side of the guide rod (7) facing the piston (3), and its inner surface is in contact with the lubricating copper alloy (5). The bottom of the sliding piece (9) is in relative cooperation with the PTFE plate (6) on the top of the piston (3) to form a force-bearing structure that can slide relative to each other.

2. The non-rotating simplified type bridge bearing based on the pot bearing according to claim 1, characterized in that: The piston (3) is made entirely of carbon steel.

3. The non-rotating simplified type bridge bearing based on the pot bearing according to claim 1, characterized in that: The height of the piston (3) is greater than the height of the basin base (1).

4. The basin-type bearing non-rotational simplified bridge bearing based on the basin-type bearing according to claim 1, characterized in that: The sliding plate (8) is provided with a lifting ring (10) for transportation in the middle of its surface.

5. The non-rotating simplified basin-type bearing based bridge bearing according to claim 1, characterized in that: The basin-shaped base (1) is provided with a first high-strength bolt (11) on both sides of the edge, and the sliding plate (8) is provided with a second high-strength bolt (12).

6. The basin-type bearing non-rotational simplified bridge bearing based on the basin-type bearing according to claim 1, characterized in that: Temporary fixing components (13) are provided on both sides of the sliding plate (8). The temporary fixing components (13) include a connecting shaft (131) and a connecting rod (132). The connecting shaft (131) is provided on the sliding plate (8), and the connecting rod (132) is provided through the connecting shaft (131), with its bottom contacting the upper surface of the basin base (1).

7. The basin-type bearing non-rotational simplified bridge bearing based on the basin-type bearing according to claim 1, characterized in that: The surface of the PTFE plate (6) is coated with silicone grease.

8. The basin-type bearing non-rotational simplified bridge bearing based on the basin-type bearing according to claim 1, characterized in that: There is a gap between the piston (3) and the sliding plate (8). Half of the PTFE plate (6) is set inside the groove (4) and the other half is set outside the groove (4). The PTFE plate (6) set outside the groove (4) is adapted to the size of the gap and is in uniform contact with the bottom of the sliding plate (9).

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