Frictional shock absorbing spherical bearing

Abstract

The utility model relates to a kind of friction damping spherical support, including upper support plate and lower support plate, and the spherical support is detachably installed between the lower surface of upper support plate and the upper surface of lower support plate by bolt, and the spherical support includes spherical surface plate and spherical crown lining plate;Spherical crown lining plate top is equipped with arc-shaped groove, and the lower end of spherical surface plate is equipped with spherical convex surface compatible with arc-shaped groove, and spherical crown lining plate is slidably matched with the spherical convex surface of spherical surface plate by arc-shaped groove;The upper end surface of spherical surface plate is fixedly connected with upper slide plate, and the lower end surface of spherical crown lining plate is fixedly connected with lower slide plate, and upper slide plate and lower slide plate are all made of polyfluoroethylene wear-resistant material;Between upper support plate and lower support plate, damping component distributed around the circumference of spherical crown lining plate is also installed.The utility model optimizes friction pair structure and material, simplifies damping component, realizes stable damping, and prolongs service life.

Description

Technical Field

[0001] This utility model relates to the field of building support technology, and in particular to a friction damping spherical support. Background Technology

[0002] In engineering structures such as bridges and large public buildings, bearings, as key components connecting the superstructure and the foundation, must simultaneously meet the requirements of load-bearing, rotation, and displacement adaptation, and possess good vibration damping performance under dynamic loads such as earthquakes and vehicle impacts. Existing spherical bearings mostly achieve vibration damping through rubber pads and dampers; however, they have the following drawbacks: rubber pad damping is easily affected by temperature; its elasticity decreases and it is prone to cracking at low temperatures, while it ages easily at high temperatures, resulting in a short service life, and its damping effect diminishes significantly over time; the combination structure of independent dampers and bearings is complex, difficult to install and debug, occupies a large space, and has poor stability in the coordinated operation of the damper and bearing, easily leading to displacement incoordination problems; some friction-type vibration damping bearings use inappropriate friction pair materials, resulting in poor wear resistance, and the friction surface is prone to dust and impurities, leading to large fluctuations in friction force and unstable damping effect.

[0003] Therefore, it is necessary to develop a friction-damping spherical bearing to address the aforementioned shortcomings. Utility Model Content

[0004] The purpose of this invention is to provide a friction damping spherical bearing that optimizes the structure and materials of the friction pair and simplifies the damping components to achieve bidirectional stable damping in both vertical and horizontal directions, while extending the service life of the bearing and reducing the difficulty of installation and commissioning.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This utility model discloses a friction damping spherical support, comprising an upper support plate and a lower support plate. A spherical support is detachably installed between the lower surface of the upper support plate and the upper surface of the lower support plate via bolts. The spherical support includes a spherical face plate and a spherical crown liner plate. The top of the spherical crown liner plate has an arc-shaped groove, and the lower end of the spherical face plate has a spherical convex surface adapted to the arc-shaped groove. The spherical crown liner plate slides in contact with the spherical convex surface of the spherical face plate through the arc-shaped groove. The upper end surface of the spherical face plate has an upper sliding plate, and the lower end surface of the spherical crown liner plate has a lower sliding plate. Both the upper and lower sliding plates are made of wear-resistant polyvinyl fluoride material. A damping component distributed circumferentially around the spherical crown liner plate is also installed between the upper and lower support plates.

[0006] Preferably, the lower support plate has a circular mounting groove at the top, the bottom of the spherical crown liner has a flat structure, and the bottom of the spherical crown liner is embedded in the circular mounting groove of the lower support plate, and the inner wall of the circular mounting groove is provided with a rubber buffer layer.

[0007] Preferably, the shock absorption assembly includes annular disc springs and elastic members; the annular disc springs are arranged in a plurality of stacked units, with both ends of the annular disc springs elastically abutting against the bottom of the upper support plate and the top of the lower support plate, respectively; the elastic members are disposed on the outside of the spherical cap liner and located on the inside of the lower support plate, and the elastic members are arranged in four groups and evenly distributed along the circumference of the spherical cap liner, with the included angle between two adjacent groups of elastic members being 90°; the elastic members are arc-shaped elastic springs made of spring steel, with the outer side of the arc abutting against the outer surface of the spherical cap liner, and the two ends of the arc-shaped elastic spring abutting against the inner surface of the lower support plate.

[0008] Preferably, a dust cover is fitted on the outer side of the upper support plate and the lower support plate. The dust cover is a neoprene rubber flexible corrugated pipe structure, and its two ends are respectively sealed and fixed to the outer side wall of the upper support plate and the outer side wall of the lower support plate by stainless steel clamps. The inner wall of the dust cover is coated with an anti-aging coating.

[0009] Preferably, the upper surface of the upper support plate is provided with pre-embedded bolt holes for connection with the superstructure, and the pre-embedded bolt holes are provided in a plurality of form and evenly distributed along the central circumference of the upper support plate; the lower surface of the lower support plate is provided with anchor bolt grooves for connection with the lower foundation, and the inner wall of the anchor bolt grooves is provided with anti-slip texture.

[0010] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This utility model features a friction-damping spherical bearing. By employing a damping assembly composed of annular disc springs and spring steel arc-shaped elastic spring sheets, it avoids the low-temperature elasticity degradation and high-temperature aging problems associated with rubber pad damping. The spherical crown liner is precisely positioned via a circular mounting groove on the lower bearing plate. Four sets of arc-shaped elastic spring sheets are evenly distributed along the circumference of the spherical crown liner, ensuring synchronized force and displacement coordination between the damping assembly and the bearing, avoiding displacement inconsistencies. This also eliminates the complex adjustment steps of independent dampers. The upper and lower sliding plates are made of wear-resistant polytetrafluoroethylene (PTFE), which has a stable coefficient of friction and wear resistance 8-10 times that of traditional steel-to-steel friction pairs, preventing friction fluctuations. A flexible neoprene rubber dust cover is fitted on the outside, completely isolating dust and impurities from entering the friction surface, ensuring stable friction performance during long-term use. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] Fig. 1 This is a three-dimensional structural diagram of the friction damping spherical support of this utility model; Fig. 2 This is a schematic diagram of the front sectional view of the friction damping spherical support of this utility model; Fig. 3A schematic diagram of a three-dimensional structure for installing elastic components.

[0013] Explanation of reference numerals in the attached drawings: 1. Upper support plate; 2. Lower support plate; 3. Spherical plate; 4. Spherical crown liner; 5. Upper sliding plate; 6. Lower sliding plate; 7. Shock absorption assembly; 701. Annular disc spring; 702. Elastic component; 8. Mounting groove; 9. Rubber buffer layer; 10. Dust cover; 11. Embedded bolt hole; 12. Anchor bolt groove. Detailed Implementation

[0014] The core of this invention is to provide a friction damping spherical support, which achieves stable damping and extends service life by optimizing the structure and materials of the friction pair and simplifying the damping components.

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing 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.

[0017] Refer to the attached diagram. Fig. 1 This is a three-dimensional structural diagram of the friction damping spherical support of this utility model; Fig. 2 This is a schematic diagram of the front sectional view of the friction damping spherical support of this utility model; Fig. 3 A schematic diagram of a three-dimensional structure for installing elastic components.

[0018] In one specific implementation, such as Figs. 1-3As shown, a friction damping spherical bearing includes an upper support plate 1 and a lower support plate 2. The upper surface of the upper support plate 1 is provided with pre-embedded bolt holes 11 for connection with the superstructure. Preferably, 8-10 pre-embedded bolt holes 11 are evenly distributed along the central circumference of the upper support plate 1. The upper support plate 1 is connected to the superstructure through the pre-embedded bolt holes 11. The lower surface of the lower support plate 2 is provided with anchor bolt grooves 12 for connection with the lower foundation. The inner wall of the anchor bolt grooves 12 is provided with anti-slip texture. Preferably, 8-10 anchor bolt grooves 12 are provided. The lower support plate 2 is placed on the foundation mounting surface through the anchor bolt grooves 12 and fixed by bolts in the anchor bolt grooves 12, while simultaneously adjusting the levelness of the lower support plate 2.

[0019] In one specific implementation, such as Figs. 1-3 As shown, a spherical support is detachably installed between the lower surface of the upper support plate 1 and the upper surface of the lower support plate 2 via bolts. The spherical support includes a spherical plate 3 and a spherical crown liner 4; the top of the spherical crown liner 4 is provided with an arc-shaped groove, and the lower end of the spherical plate 3 is provided with a spherical convex surface adapted to the arc-shaped groove. The spherical crown liner 4 slides in contact with the spherical convex surface of the spherical plate 3 through the arc-shaped groove. When the upper structure rotates due to uneven load, the spherical convex surface of the spherical plate 3 can slide along the arc-shaped groove of the spherical crown liner 4, achieving rotation within ±5° through the multi-angle adaptability of the spherical surface contact. The upper end face of the spherical plate 3 is provided with an upper sliding plate 5, and the lower end face of the spherical crown liner 4 is provided with a lower sliding plate 6. Both the upper sliding plate 5 and the lower sliding plate 6 are made of wear-resistant polyvinyl fluoride material. A damping component 7 is also installed between the upper support plate 1 and the lower support plate 2, distributed circumferentially around the spherical crown liner 4. The polytetrafluoroethylene material of the upper sliding plate 5 and the lower sliding plate 6 can reduce frictional loss during load transmission. At the same time, the convex surface and groove of the ball plate 3 and the ball crown liner 4 can distribute the concentrated load and avoid excessive local stress.

[0020] Align the spherical convex surface of the ball panel 3 with the arc-shaped groove of the ball crown liner 4, and apply polytetrafluoroethylene grease. The upper sliding plate 5 is fixed to the lower surface of the upper support plate 1 with epoxy resin adhesive, and after curing, it adheres to the upper end face of the ball panel 3. The lower sliding plate 6 is fixed to the inner upper surface of the lower support plate 2 with epoxy resin adhesive, and after curing, it adheres to the lower end face of the ball crown liner 4.

[0021] In one specific implementation, such as Figs. 1-3 As shown, a circular mounting groove 8 is provided on the top of the lower support plate 2, and the bottom of the spherical crown liner 4 is a flat structure, with the bottom of the spherical crown liner 4 embedded in the circular mounting groove 8 of the lower support plate 2. A rubber buffer layer 9 is provided on the inner wall of the circular mounting groove 8. The nitrile rubber buffer layer 9 is bonded to the inner wall of the circular mounting groove 8, and the lower sliding plate 6 is fixed to the lower end face of the spherical crown liner 4 with epoxy resin adhesive, thus embedding the spherical crown liner 4 into the circular mounting groove 8 to ensure a clearance fit.

[0022] In one specific implementation, such as Figs. 1-3As shown, the damping component 7 includes annular disc springs 701 and elastic members 702. Several annular disc springs 701 are stacked together, with both ends of each spring elastically abutting against the bottom of the upper support plate 1 and the top of the lower support plate 2, respectively. Preferably, 3 to 5 annular disc springs 701 are stacked and fitted onto the outside of the spherical cap liner 4, ensuring that both ends are in contact with the bottom of the upper support plate 1 and the top of the lower support plate 2, respectively. When encountering vertical dynamic loads such as earthquakes or vehicle impacts, the upper support plate 1 compresses the annular disc springs 701 downwards. The springs absorb vertical vibration energy through compression and rebound, while utilizing the elastic restoring characteristics of spring steel to prevent the load from being directly transmitted to the lower foundation. Elastic members 702 are located on the outer side of the spherical cap liner 4 and on the inner side of the lower support plate 2. Four sets of elastic members 702 are evenly distributed along the circumference of the spherical cap liner 4, with an included angle of 90° between adjacent sets. Each elastic member 702 is an arc-shaped elastic spring made of spring steel. The outer arc of the spring abuts against the outer surface of the spherical cap liner 4, while the two ends abut against the inner surface of the lower support plate 2. To maintain elastic deformation, each set of elastic members consists of 3 to 5 stacked arc-shaped elastic springs. When the structure experiences horizontal displacement or rotation, the spherical cap liner 4 compresses the four sets of outer arc-shaped elastic springs. The springs provide horizontal damping force through bending deformation and elastic recovery, buffering horizontal vibrations. Simultaneously, because the springs are evenly distributed along the circumference, it avoids support jamming caused by misaligned displacement. In one specific implementation, such as Figs. 1-3 As shown, dust covers 10 are fitted onto the outer sides of the upper support plate 1 and the lower support plate 2. The dust cover 10 is a flexible corrugated tube structure made of neoprene rubber. Its two ends are respectively sealed and fixed to the outer walls of the upper support plate 1 and the lower support plate 2 via stainless steel clamps. The inner wall of the dust cover 10 is coated with an anti-aging coating. During horizontal or vertical movement, the corrugated tube structure can flexibly stretch with the displacement, ensuring that the dust cover 10 remains sealed to the upper support plate 1 and the lower support plate 2, preventing dust from entering the friction surfaces.

[0023] The operation of this friction-damping spherical bearing is as follows: When the superstructure bears a vertical load, the load is transferred from the upper support plate 1 to the upper sliding plate 5, then through the spherical panel 3, the spherical crown liner 4, and the lower sliding plate 6 to the lower support plate 2, and finally diffused to the lower foundation. The low friction characteristics of the PTFE sliding plate reduce energy loss during load transfer. At the same time, the convex and groove surfaces of the spherical panel 3 and the spherical crown liner 4 can disperse concentrated loads and avoid excessive local stress. When the ambient temperature rises, the upper bridge beam expands and elongates, causing the upper support plate 1 to move horizontally. This causes the upper sliding plate 5 to slide along the upper surface of the spherical panel 3, while the spherical panel 3 rotates slightly along the arc-shaped groove of the spherical crown liner 4. Subsequently, the lower sliding plate 6 slides along the upper surface of the lower support plate 2, achieving horizontal displacement compensation. The dust cover 10 flexibly stretches with the displacement, always maintaining a seal to prevent dust from entering the friction surface. When subjected to an earthquake or major impact, the upper support plate 1 is subjected to a downward impact load, which compresses the annular disc spring 701. The spring is compressed and deformed to absorb the vertical vibration energy. After the peak load, the spring rebounds and resets, preventing the lower foundation from being impacted. When horizontal swaying occurs, the spherical crown liner 4 compresses the arc-shaped elastic spring on one side. The spring bends and deforms to provide horizontal damping force to buffer the swaying, while the spring on the other side stretches and resets. This, combined with the spherical sliding of the spherical panel 3, ensures the stable operation of the support.

[0024] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0025] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A friction damping spherical bearing, comprising an upper support plate (1) and a lower support plate (2), characterized in that: A spherical support is detachably installed between the lower surface of the upper support plate (1) and the upper surface of the lower support plate (2) by bolts. The spherical support includes a spherical panel (3) and a spherical crown liner (4). The top of the spherical crown liner (4) is provided with an arc-shaped groove, and the lower end of the spherical panel (3) is provided with a spherical convex surface adapted to the arc-shaped groove. The spherical crown liner (4) slides with the spherical convex surface of the spherical panel (3) through the arc-shaped groove. The upper end surface of the spherical panel (3) is provided with an upper sliding plate (5), and the lower end surface of the spherical crown liner (4) is provided with a lower sliding plate (6). Both the upper sliding plate (5) and the lower sliding plate (6) are made of polytetrafluoroethylene wear-resistant material. A shock-absorbing component (7) is also installed between the upper support plate (1) and the lower support plate (2) and distributed circumferentially around the spherical crown liner (4).

2. The friction damping spherical support according to claim 1, characterized in that: The lower support plate (2) has a circular mounting groove (8) at the top, the bottom of the spherical crown liner (4) is a flat structure, and the bottom of the spherical crown liner (4) is embedded in the circular mounting groove (8) of the lower support plate (2). The inner wall of the circular mounting groove (8) is provided with a rubber buffer layer (9).

3. The friction damping spherical support according to claim 1, characterized in that: The shock absorption assembly (7) includes an annular disc spring (701) and an elastic member (702); the annular disc spring (701) is composed of several stacked ones, and the two ends of the annular disc spring (701) are elastically abutting the bottom of the upper support plate (1) and the top of the lower support plate (2) respectively; the elastic member (702) is located on the outside of the spherical crown liner (4) and on the inside of the lower support plate (2), and the elastic member (702) is provided in four groups and evenly distributed along the circumference of the spherical crown liner (4), and the included angle between two adjacent groups of elastic members (702) is 90°; the elastic member (702) is an arc-shaped elastic spring, the arc-shaped elastic spring is made of spring steel, and its outer arc abuts the outer side of the spherical crown liner (4), and the two ends of the arc-shaped elastic spring abut the inner side of the lower support plate (2).

4. The friction damping spherical support according to claim 1, characterized in that: The upper support plate (1) and the lower support plate (2) are fitted with dust covers (10). The dust cover (10) is a neoprene rubber flexible corrugated pipe structure. Its two ends are respectively sealed and fixed to the outer wall of the upper support plate (1) and the outer wall of the lower support plate (2) by stainless steel clamps. The inner wall of the dust cover (10) is coated with an anti-aging coating.

5. The friction damping spherical support according to claim 1, characterized in that: The upper surface of the upper support plate (1) is provided with pre-embedded bolt holes (11) for connection with the upper structure. There are several pre-embedded bolt holes (11) and they are evenly distributed along the central circumference of the upper support plate (1). The lower surface of the lower support plate (2) is provided with anchor bolt grooves (12) for connection with the lower foundation. The inner wall of the anchor bolt grooves (12) is provided with anti-slip texture.

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