A self-resetting sliding and rotating friction energy dissipation shock-absorbing bearing

Abstract

The present invention discloses a self-resetting sliding and rotating friction energy-absorbing and shock-absorbing bearing, which includes an upper base, a lower base, an I-shaped steel plate, a first steel spring, a second steel spring, a friction cylinder ring, a friction layer, an annular slider, a wedge block, a movable plate and a cylindrical limit block. By connecting the steel spring with the friction cylinder ring, the large-area friction between the annular slider and the friction cylinder ring and the rotation of the annular slider consume energy, and realize the self-resetting of the annular slider and the movable plate. When an earthquake occurs, the present invention can generate relative sliding in the circular groove inside the base, and consume energy through sliding friction, and at the same time, it can cause the structure to have damped vibration to make the structure safer; when the annular slider slides, it moves inward to compress the movable plate, and the movable plate in turn applies a force couple to the annular slider, causing it to rotate to extend the relative sliding path, increase damping and better dissipate energy; the energy dissipation and shock absorption effect is good, and the symmetrical structure is simple and reasonable, and easy to manufacture.

Description

Technical Field

[0001] The invention relates to the technical field of bridge earthquake resistance, in particular to a self-resetting sliding and rotating friction energy dissipation shock absorbing bearing. Background Art

[0002] With the rapid economic development of our country, the infrastructure industry has developed rapidly, and more and more bridges are being built. The large span of the bridge structure itself makes it vulnerable to earthquake damage, so it is very necessary to take earthquake-resistant measures for the bridge. Among the current earthquake-resistant methods, shock-absorbing bearings are one of the most common measures. At present, there are two types of commonly used shock-absorbing bearings, one is rubber shock-absorbing bearings, and the other is friction shock-absorbing bearings. Rubber isolation bearings have good seismic isolation effects, but low bearing capacity; friction isolation bearings have strong bearing capacity, but in the case of high earthquake intensity, they are prone to excessive slip and small friction area and energy consumption capacity. Summary of the invention

[0003] In view of the above-mentioned defects of the prior art, the present invention designs and develops a self-resetting sliding and rotating friction energy dissipation and shock-absorbing bearing, which can provide multiple sliding friction surfaces, and the friction area can be effectively increased through the rotation of the slider, so as to achieve further energy dissipation and shock absorption when an earthquake occurs; at the same time, the elastic force of the spring can achieve the effect of resetting it after sliding and rotating.

[0004] To achieve the above purpose, the technical solution used in the present invention is:

[0005] A self-resetting sliding and rotating friction energy dissipation and shock absorbing support, comprising an upper base, a lower base, an I-shaped steel plate, a first steel spring, a second steel spring, a friction cylinder ring, a friction layer, an annular slider, a wedge block, a movable plate and a cylindrical limit block;

[0006] The upper base is composed of a first bottom plate and first supports on both sides, the overall structure is square, and a first circular groove is provided at the lower part of the first bottom plate; the lower base is composed of a second bottom plate and second supports on both sides, the overall structure is square, and a second circular groove is provided at the lower part of the second bottom plate, and a cylindrical limit block is provided at the center of the second circular groove; one side of the I-shaped steel plate is fixedly bolted to the first support of the upper base, and the other side is fixedly bolted to the second support of the lower base to connect the upper base and the lower base;

[0007] One end of the first steel spring is fixedly connected to the inner wall of the first circular groove or the second circular groove, and the other end is fixedly connected to the friction cylinder ring; there are four first steel springs, which are respectively arranged at four equal points of the circle where the second circular groove is located; the annular slider is arranged in the friction cylinder ring, and wedge blocks are fixedly arranged on the top and bottom of its inner surface;

[0008] One end of the movable plate is fixedly hinged to the top and bottom of the cylindrical limiting block, and the movable plate and the cylindrical limiting block are connected via a second steel spring.

[0009] The first bottom plate and the second bottom plate extend to both sides to protrude the first support and the second support and are provided with bolt holes. The bottom surfaces of the first support and the second support are provided with bolt holes for connecting the I-shaped steel plates. The heights of the first circular groove and the second circular groove are not higher than the heights of the first support and the second support.

[0010] The height of the friction sleeve ring is consistent with the height of the first circular groove and the second circular groove.

[0011] The upper and lower surfaces of the annular sliding block are both provided with friction layers.

[0012] The length of the movable plate is sufficient to ensure that its free end just contacts the middle of the wedge block plane; the movable plate and the second steel spring combination structure are provided with four each at the top and bottom of the cylindrical limit block, and their positions are evenly distributed at the four equal points of the circle where the cylindrical limit block is located.

[0013] There are 8 wedge blocks on the top and bottom of the inner wall of the circular slider, and the positions are evenly distributed at 8 equally divided points of the inner ring of the circular slider; the plane of the wedge block is placed perpendicular to the inner wall of the circular slider, and the other surface of the wedge block is an arc-shaped curved surface.

[0014] Beneficial effects of the present invention:

[0015] 1. The present invention can achieve a buffering effect on multi-directional impact forces during an earthquake and reduce bridge damage; a first circular groove and a second circular groove are provided at the first bottom plate and the second bottom plate, and a first steel spring is provided at four equally divided points on the inner walls of the two grooves. The first steel spring is connected to a friction cylinder ring, and a circular slider is provided inside the ring. Since the slider is circular in shape, it can achieve 360° sliding and can withstand impacts from all directions on the plane. In combination with the first steel springs in four directions, it can achieve buffering of impact forces in all directions, effectively reduce collisions, and reduce bridge damage;

[0016] 2. The present invention can effectively reduce and consume earthquake energy and reduce bridge damage; the annular slider contacts with the friction cylinder ring to form a large-area friction surface, and the upper and lower surfaces of the annular slider contact with the upper and lower bases to form large-area friction surfaces, a total of 4 friction surfaces. The setting of multiple friction surfaces can effectively consume earthquake energy;

[0017] 3. The present invention can realize the rotation of the annular slider, further fully dissipating the earthquake energy; the movable plates arranged at the top and bottom of the cylindrical limit block and the second steel spring and the wedge blocks at the top and bottom of the annular slider together form a rotating mechanism. During an earthquake, the annular slider moves inward to compress the movable plate when sliding, and the movable plate in turn acts on the annular slider through the wedge blocks to rotate it, effectively increasing the friction area of ​​the annular slider, further fully dissipating the earthquake energy and reducing damage. The multi-directional wedge blocks and multi-directional movable plates can ensure the smooth sliding of the annular slider;

[0018] 4. The present invention can realize the self-reset of the annular slider and the movable plate and consume energy; the first steel springs arranged in the four directions in the circular groove can restore the annular slider to its initial state after an earthquake, so that it always remains in the center of the circular groove; the second steel spring under the movable plate can restore the movable plate to its initial state after the annular slider is reset; the first steel spring and the second steel spring can convert earthquake energy into elastic potential energy, further consuming energy;

[0019] 5. The present invention has a vertically symmetrical structure as a whole, which is reasonable and simple and easy to manufacture;

[0020] 6. The present invention has the characteristics of low material price, convenient construction, energy saving, environmental protection, and multi-function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the overall structure of a self-resetting sliding and rotating friction energy dissipation shock absorbing support of the present invention;

[0022] Figure 2 This is a top view of the main structure of the present invention after removing the upper base;

[0023] Figure 3 This is a schematic diagram of the internal structure of the second bottom plate of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the friction energy dissipation part of the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of the circular slider of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the upper base of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the lower base of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the wedge block of the present invention;

[0029] Fig. 9This is a schematic diagram of the structure of the cylindrical limit block, the bottom movable plate and the second steel spring of the present invention;

[0030] Fig.10 The figure is a schematic diagram of the overall three-dimensional structure of a self-resetting sliding and rotating friction energy dissipation shock absorbing bearing of the present invention.

[0031] In the figure: 1. upper base; 2. lower base; 3. first steel spring; 4. friction cylinder ring; 5. friction layer; 6. annular slider; 7. cylindrical limit block; 8. first circular groove; 9. second circular groove; 10. I-shaped steel plate; 11. bolt; 12. first bottom plate; 13. second bottom plate; 14. first support; 15. second support; 16. wedge block; 17. movable plate; 18. second steel spring. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] Example: See Figure 1-10 .

[0034] A self-resetting sliding and rotating friction energy dissipation and shock absorbing bearing, comprising an upper base 1, a lower base 2, an I-shaped steel plate 10, a first steel spring 3, a second steel spring 18, a friction cylinder ring 4, a friction layer 5, an annular slider 6, a wedge block 16, a movable plate 17 and a cylindrical limit block 7;

[0035] The upper base 1 is composed of a first bottom plate 12 and first supports 14 on both sides, and the overall structure is square. A first circular groove 8 is provided at the lower part of the first bottom plate 12; the lower base 2 is composed of a second bottom plate 13 and second supports 15 on both sides, and the overall structure is square. A second circular groove 9 is provided at the lower part of the second bottom plate 13, and a cylindrical limit block 7 is provided at the center of the second circular groove 9; one side of the I-shaped steel plate 10 is fixedly bolted to the first support 14 of the upper base 1, and the other side is fixedly bolted to the second support 15 of the lower base 2, so as to connect the upper base 1 and the lower base 2;

[0036] One end of the first steel spring 3 is fixedly connected to the inner wall of the first circular groove 8 or the second circular groove 9, and the other end is fixedly connected to the friction cylinder ring 4; there are four first steel springs 3, which are respectively arranged at four equally divided points of the circle where the second circular groove 9 is located; the annular slider 6 is arranged in the friction cylinder ring 4, and wedge blocks 16 are fixedly arranged on the top and bottom of its inner surface;

[0037] One end of the movable plate 17 is fixedly hinged to the top and bottom of the cylindrical limiting block 7 , and the movable plate 17 and the cylindrical limiting block 7 are connected via a second steel spring 18 .

[0038] The first bottom plate 12 and the second bottom plate 13 extend to both sides to protrude the first support 14 and the second support 15, and are provided with bolt holes. The bottom surfaces of the first support 14 and the second support 15 are provided with bolt holes for connecting the I-shaped steel plate 10; the height of the first circular groove 8 and the second circular groove 9 is not higher than the height of the first support 14 and the second support 15.

[0039] The height of the friction sleeve ring 4 is consistent with the height of the first circular groove 8 and the second circular groove 9 .

[0040] The upper and lower surfaces of the annular sliding block 6 are both provided with a friction layer 5 .

[0041] The length of the movable plate 17 is sufficient for its free end to just contact the middle of the plane of the wedge block 16; the combined structure of the movable plate 17 and the second steel spring 18 is provided with four each at the top and bottom of the cylindrical limit block 7, and their positions are evenly distributed at the four equal points of the circle where the cylindrical limit block 7 is located.

[0042] There are 8 wedge blocks 16 at the top and bottom of the inner wall of the annular slider 6, and they are evenly distributed at 8 equally divided points of the inner circle of the annular slider 6; the plane of the wedge block 16 is placed perpendicular to the inner wall of the annular slider 6, and the other surface of the wedge block 16 is an arc-shaped curved surface.

[0043] The working principle of the self-resetting sliding and rotating friction energy dissipation shock-absorbing bearing of the present invention is as follows: when no earthquake occurs, the first steel spring 3 and the second steel spring 18 are in an initial state without deformation, the center of the friction cylinder ring 4 and the annular slider 6 coincide with the center of the circular grooves 8 and 9, the movable plate 17 is in an initial state, and the free end of the plate is located in the middle of the plane of the wedge block 16; when an earthquake occurs, the annular slider 6 slides under the impact from all directions, and the stretching and compression of the first steel spring 3 arranged in four directions on the walls of the first circular groove 8 and the second circular groove 9 resolve the impact force, realize buffering of the impact forces in all directions, effectively reduce collisions, and reduce bridge damage; during the relative sliding process of the annular slider 6, the friction layers 5 on the upper and lower surfaces rub against the surfaces of the first circular groove 8 and the second circular groove 9, and energy is consumed by sliding friction; at the same time, the annular slider 6 moves inward to compress the movable plate 17 when sliding, and the movable The plate 17 in turn applies a couple of force to the annular slider 6 through the wedge block 16, causing it to rotate, causing the annular slider 6 to slide and rub against the friction cylinder ring 4, effectively increasing the friction area of ​​the annular slider 6, further consuming energy. The generation of further sliding friction can cause damped vibration of the structure, greatly reducing the amplitude near the resonance zone, making the structure safer. At the same time, the first steel spring 3 and the second steel spring 18 in a tension and compression state can convert earthquake energy into elastic potential energy, further consuming energy. The setting of the I-shaped steel plate 10 can connect the upper and lower bases 1 and 2 to prevent the upper base 1 from being separated from the lower base 2 during an earthquake, causing the slider to fall; after the earthquake, the first steel springs 3 arranged in the four directions in the circular grooves 8 and 9 can restore the annular slider 6 to its initial state, so that it always remains in the center of the circular grooves 8 and 9; the second steel spring 18 under the movable plate 17 can restore the movable plate 17 to its initial state after the annular slider 6 is reset.

[0044] It should be noted that in the above description, the directions or positional relationships indicated by the terms "left", "right", "front", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes. The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent transformations made using the contents of the present specification and drawings or directly or indirectly applied in related technical fields should be included in the patent protection scope of the present invention.

Claims

1. A self-resetting sliding and rotating friction energy dissipation shock absorbing support, characterized in that: It comprises an upper base (1), a lower base (2), an I-shaped steel plate (10), a first steel spring (3), a second steel spring (18), a friction cylinder ring (4), a friction layer (5), an annular slider (6), a wedge block (16), a movable plate (17) and a cylindrical limit block (7); The upper base (1) is composed of a first bottom plate (12) and first supports (14) on both sides, and the overall structure is square. A first circular groove (8) is provided at the lower part of the first bottom plate (12); the lower base (2) is composed of a second bottom plate (13) and second supports (15) on both sides, and the overall structure is square. A second circular groove (9) is provided at the lower part of the second bottom plate (13), and a cylindrical stop block (7) is provided at the center of the second circular groove (9); one side of the I-shaped steel plate (10) is fixedly bolted to the first support (14) of the upper base (1), and the other side is fixedly bolted to the second support (15) of the lower base (2), so as to connect the upper base (1) and the lower base (2); The first bottom plate and the second bottom plate are provided with a first circular groove and a second circular groove, and first steel springs are provided at four equally divided points on the inner walls of the two grooves, one end of the first steel spring (3) is fixedly connected to the inner wall of the first circular groove (8) or the second circular groove (9), and the other end is fixedly connected to the friction cylinder ring (4); the first steel spring is connected to the friction cylinder ring, and a circular slider is provided inside the ring; the circular slider (6) is provided inside the friction cylinder ring (4), and wedge blocks (16) are fixedly provided on the top and bottom of the inner surface of the circular slider; One end of the movable plate (17) is fixedly hinged to the top and bottom of the cylindrical limit block (7), and the movable plate (17) and the cylindrical limit block (7) are connected via a second steel spring (18); The upper and lower surfaces of the annular sliding block (6) are both provided with a friction layer (5).

2. The self-resetting sliding and rotating friction energy dissipation and shock absorbing support according to claim 1 is characterized in that: The first bottom plate (12) and the second bottom plate (13) extend to both sides to protrude the first support (14) and the second support (15), and are provided with bolt holes; the bottom surfaces of the first support (14) and the second support (15) are provided with bolt holes for connecting the I-shaped steel plate (10); the height of the first circular groove (8) and the second circular groove (9) is not higher than the height of the first support (14) and the second support (15).

3. The self-resetting sliding and rotating friction energy dissipation and shock absorbing support according to claim 1 is characterized in that: The height of the friction sleeve ring (4) is consistent with the height of the first circular groove (8) and the second circular groove (9).

4. The self-resetting sliding and rotating friction energy dissipation and shock absorbing support according to claim 1 is characterized in that: The length of the movable plate (17) is such that its free end just contacts the middle of the plane of the wedge block (16); the combined structure of the movable plate (17) and the second steel spring (18) is provided with four each at the top and bottom of the cylindrical limit block (7), and their positions are evenly distributed at the four equally divided points of the circle where the cylindrical limit block (7) is located.

5. The self-resetting sliding and rotating friction energy dissipation and shock absorbing support according to claim 1 is characterized in that: Eight wedge blocks (16) are arranged at the top and bottom of the inner wall of the annular slider (6), and are evenly distributed at eight equally divided points of the inner ring of the annular slider (6); the plane of the wedge block (16) is placed perpendicular to the inner wall of the annular slider (6), and the other surface of the wedge block (16) is an arc-shaped curved surface.

Images