Municipal road anti-seismic bridge support

Abstract

The utility model relates to the field of friction pendulum seismic support, disclose a kind of municipal road anti-seismic bridge support, including from top to bottom upper support plate, first sliding member, second sliding member and lower support plate, first spherical surface friction pair is formed between upper support plate and first sliding member, second spherical surface friction pair is formed between first sliding member and second sliding member, third spherical surface friction pair is formed between second sliding member and lower support plate, first spherical surface friction pair, second spherical surface friction pair and third spherical surface friction pair correspond to be provided with first lubrication passage, second lubrication passage and third lubrication passage, for injecting lubricant. By setting first lubrication passage, second lubrication passage and third lubrication passage, can provide effective lubrication scheme for first spherical surface friction pair, second spherical surface friction pair and third spherical surface friction pair respectively, not only can reduce the wear of friction pair, prolong the service life of support, also can improve the reliability and stability of support in long-term use process.

Description

Technical Field

[0001] This utility model relates to the field of friction pendulum damping bearings, and in particular to a seismic-resistant bridge bearing for municipal roads. Background Technology

[0002] Seismic bearings for municipal roads play a crucial role in modern bridge engineering. With the acceleration of urbanization and the increasing frequency of natural disasters such as earthquakes, the seismic performance of bridge structures is receiving growing attention. Seismic bearings can effectively absorb and dissipate seismic energy, protecting the main bridge structure from damage and ensuring smooth and safe traffic flow; therefore, their application prospects are broad.

[0003] In the existing technology, patent document CN222008633U, entitled "Seismic Bearing for Municipal Road Bridges," provides an innovative seismic bearing solution. This solution includes an upper bearing plate, a first sliding member, a second sliding member, and a lower bearing plate arranged sequentially from top to bottom. Through the connection of a first friction pair, a second friction pair, and a third friction pair, and an unlocking mechanism for the locking component under specific shear force, flexible vibration reduction effects under different vibration amplitudes are achieved.

[0004] However, this existing technology has significant drawbacks. Although spherical friction pairs can adapt to multi-directional sliding, lubrication of spherical contacts is far more difficult than that of planar contacts. In practical applications, this solution does not mention any lubrication measures, and during long-term use, spherical friction pairs are highly susceptible to dry friction due to insufficient lubrication. Once dry friction occurs, the wear of the friction pair will accelerate, and the particles generated by the wear may further affect the normal operation of the friction pair. If the friction pair wears excessively, it may lead to the risk of support failure, which in turn may result in the bridge structure not receiving effective seismic protection under extreme conditions such as earthquakes, undoubtedly posing a potential hazard to the safe operation of the bridge.

[0005] In summary, the problem of insufficient lubrication in existing spherical friction pairs urgently needs to be addressed. Utility Model Content

[0006] The present invention aims to provide a seismic-resistant bridge bearing for municipal roads to overcome the shortcomings mentioned above.

[0007] In order to achieve the above objectives, the technical solution of this utility model is as follows:

[0008] The seismic-resistant bridge bearing for municipal roads includes, from top to bottom, an upper bearing plate, a first sliding member, a second sliding member, and a lower bearing plate. A first spherical friction pair is formed between the upper bearing plate and the first sliding member, a second spherical friction pair is formed between the first and second sliding members, and a third spherical friction pair is formed between the second sliding member and the lower bearing plate. A first lubrication channel, a second lubrication channel, and a third lubrication channel are correspondingly provided on the first, second, and third spherical friction pairs for injecting lubricant.

[0009] Furthermore, the upper surface of the first slider is an outwardly convex spherical surface, and the first lubrication channel includes a first collecting groove, a first stopping groove, and a plurality of first lubrication grooves disposed on the upper surface of the first slider. The first collecting groove and the first stopping groove are respectively located at the middle and the adjacent edge of the upper surface of the first slider. The first stopping groove is annular, and the plurality of first lubrication grooves are radial. The first lubrication grooves are used to connect the first collecting groove and the first stopping groove.

[0010] Furthermore, the first lubrication channel also includes an injection channel disposed within the upper support plate. One end of the injection channel is located on the side wall of the upper support plate and communicates with the outside. The other end of the injection channel is located at the upper end of the first collecting groove. The injection channel is used for injecting lubricant.

[0011] Furthermore, the lower surface of the first slider is an outwardly convex spherical surface, the upper surface of the second slider is an inwardly concave spherical surface, the upper edge of the second slider protrudes beyond the lower edge of the first lower slider, and the second lubrication channel includes a plurality of second lubrication grooves disposed on the upper surface of the second slider. The plurality of second lubrication grooves are radially arranged, and one end of the plurality of second lubrication grooves is located at the center of the upper surface of the second slider and is interconnected with each other.

[0012] Furthermore, the lower surface of the second sliding member is an outwardly convex spherical surface, and the third lubrication channel includes a second stop groove and a plurality of third lubrication grooves. The second stop groove is annular and located in the middle of the upper surface of the second sliding member. The plurality of third lubrication grooves are radial, and one end of the plurality of third lubrication grooves is connected to the second stop groove.

[0013] Furthermore, the third spherical friction pair is locked by a locking component, which is released when subjected to a preset shear force.

[0014] Furthermore, the locking component includes:

[0015] A blind hole is provided in the middle of the lower surface of the second sliding member, and a threaded sleeve is embedded in the blind hole. The threaded sleeve is threadedly connected to the upper end of the locking member; and

[0016] The lower support plate has a through hole in the middle, which is located inside the second stop groove, and the lower end of the locking member passes through the through hole.

[0017] Furthermore, the locking member is a rotating body, and an annular pre-fracture opening is provided in the middle of the locking member, the annular pre-fracture opening being located at the connection between the blind hole and the through hole.

[0018] Furthermore, the lower end sidewall of the locking member is provided with a pre-fracture member at an equal angle, the pre-fracture member abutting against the inner wall of the through hole, and the through hole is an inverted conical hole.

[0019] Furthermore, both the first and second sliding members are rotating bodies, and both the upper and lower support plates are provided with connecting holes.

[0020] Compared with the prior art, this utility model has at least the following advantages:

[0021] By setting up a first lubrication channel, a second lubrication channel, and a third lubrication channel, effective lubrication solutions can be provided for the first, second, and third spherical friction pairs, respectively. This not only reduces wear on the friction pairs and extends the service life of the bearings, but also improves the reliability and stability of the bearings during long-term use, thereby better ensuring the seismic performance of the bridge. This plays a crucial role in improving the overall performance of seismic-resistant bridge bearings for municipal roads and ensuring the safety and reliability of bridge engineering. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is the front view of the municipal road seismic-resistant bridge support of this utility model;

[0024] Figure 2 This utility model Figure 1 A cross-sectional view along the AA direction;

[0025] Figure 3 This utility model Figure 2 A magnified view of a portion of region B in the middle;

[0026] Figure 4 This is an exploded view of the municipal road seismic-resistant bridge support of this utility model.

[0027] Reference numerals: 1. Upper support plate; 2. First sliding member; 3. Second sliding member; 4. Lower support plate; 5. First collecting groove; 6. First stop groove; 7. First lubrication groove; 8. Filling channel; 9. Second lubrication groove; 10. Second stop groove; 11. Third lubrication groove; 12. Threaded sleeve; 13. Locking member; 14. Through hole; 15. Annular pre-fracture opening; 16. Pre-fracture member; 17. Connecting hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. 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.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1 , Figure 2 and Figure 4 This utility model provides a seismic-resistant bridge bearing for municipal roads, comprising an upper bearing plate 1, a first sliding member 2, a second sliding member 3, and a lower bearing plate 4 arranged sequentially from top to bottom. The upper bearing plate 1 and the first sliding member 2 form a first spherical friction pair, the first sliding member 2 and the second sliding member 3 form a second spherical friction pair, and the second sliding member 3 and the lower bearing plate 4 form a third spherical friction pair. To ensure sufficient lubrication of these spherical friction pairs during movement and reduce wear, a lubrication channel system is specially designed. The first, second, and third spherical friction pairs are correspondingly provided with a first lubrication channel, a second lubrication channel, and a third lubrication channel for injecting lubricant.

[0031] In the first spherical friction pair, the upper surface of the first sliding member 2 is designed as an outwardly convex spherical shape. The first lubrication channel consists of multiple parts, including a first collecting groove 5, a first stopping groove 6, and multiple first lubrication grooves 7 located on the upper surface of the first sliding member 2. The first collecting groove 5 is located in the middle of the upper surface of the first sliding member 2, while the first stopping groove 6 is located near the edge and has a ring-shaped structure. The multiple first lubrication grooves 7 are radially distributed, with one end connected to the first collecting groove 5 and the other end communicating with the first stopping groove 6. This design allows the lubricant to flow evenly from the first collecting groove 5 to the first stopping groove 6, thereby covering the entire surface of the first spherical friction pair.

[0032] In addition, the first lubrication channel also includes an injection channel 8 disposed within the upper support plate 1. One end of the injection channel 8 opens onto the side wall of the upper support plate 1, connecting to the external environment to facilitate lubricant injection. The other end of the injection channel 8 extends to the upper end of the first collecting groove 5, ensuring that the lubricant can flow smoothly into the first collecting groove 5. In actual operation, the operator can use a dedicated lubricant injection device, insert an injection hose into the injection channel 8, and then connect the output end of the lubricant injection device to the injection hose at the external opening of the injection channel 8, injecting an appropriate amount of lubricant through the injection hose. During injection, the flow rate of the lubricant should be moderate to avoid over-injection and lubricant overflow, while also ensuring that the lubricant fully fills the first collecting groove 5 and is evenly distributed across the entire surface of the first spherical friction pair through the first lubrication groove 7. After injection, disconnect the injection device from the injection hose and remove the injection hose from the injection channel 8. This method prevents lubricant residue from remaining in the injection channel 8.

[0033] For the second spherical friction pair, the lower surface of the first sliding member 2 is also designed as an outwardly convex spherical surface, while the upper surface of the second sliding member 3 is an inwardly concave spherical surface. Notably, the upper edge of the second sliding member 3 protrudes beyond the lower edge of the first sliding member 2. The second lubrication channel mainly consists of multiple second lubrication grooves 9, which are also radially distributed. One end of each groove is located at the center of the upper surface of the second sliding member 3 and they are interconnected. This design allows the lubricant to spread evenly from the center outwards along the second lubrication grooves 9, ensuring good lubrication for all parts of the second spherical friction pair. Lubricant is added one by one from the other end of each second lubrication groove 9 to lubricate the second spherical friction pair.

[0034] In the third spherical friction pair, the lower surface of the second sliding member 3 is an outwardly convex spherical surface. The third lubrication channel includes a second stop groove 10 and multiple third lubrication grooves 11. The second stop groove 10 is annular and located in the middle of the upper surface of the second sliding member 3. The multiple third lubrication grooves 11 are also radially distributed, with one end connected to the second stop groove 10. When adding lubricant, it is added one by one from the other end of the third lubrication groove 11 to achieve lubrication of the second spherical friction pair. This structural design helps to achieve uniform distribution of lubricant on the surface of the third spherical friction pair, thereby reducing wear of the friction pair during operation.

[0035] Combined with reference Figure 3To enable flexible movement of the support under extreme conditions such as earthquakes, the third spherical friction pair is locked by a locking assembly. The locking assembly is designed as follows: a blind hole is located at the center of the lower surface of the second sliding member 3, and a threaded sleeve 12 is embedded within the blind hole. The upper end of the locking member 13 is connected to the threaded sleeve 12 via threads. A through hole 14 is located in the center of the lower support plate 4, inside the second stop groove 10. The lower end of the locking member 13 passes through the through hole 14. This locking assembly design maintains the stability of the third spherical friction pair under normal conditions, and automatically releases when subjected to a preset shear force, allowing the support to move freely under extreme conditions such as earthquakes, thus providing seismic resistance.

[0036] The locking component 13 is a rotating structure with an annular pre-fracture opening 15 located in its central part. The annular pre-fracture opening 15 is located at the connection between the blind hole and the through hole 14. When the shear force borne by the locking component 13 reaches a preset value, the structure at the annular pre-fracture opening 15 will fracture first, thereby allowing the locking component 13 to smoothly disengage from the blind hole and the through hole 14, realizing the unlocking function of the locking assembly.

[0037] Furthermore, multiple pre-fracture members 16 are provided at equal angles on the lower sidewall of the locking member 13. These pre-fracture members 16 abut against the inner wall of the through hole 14. The through hole 14 is designed as an inverted conical hole. This structural design helps the pre-fracture members 16 to separate smoothly from the inner wall of the through hole 14 when the locking member 13 is unlocked, thereby ensuring that the locking member 13 can disengage from the through hole 14 without obstruction, further improving the reliability of the unlocking of the locking assembly.

[0038] To improve the overall stability and reliability of the bearing, both the first sliding member 2 and the second sliding member 3 are designed as rotating structures. Meanwhile, connection holes 17 are provided on both the upper bearing plate 1 and the lower bearing plate 4. These connection holes 17 are used to securely connect the bearing to the bridge structure and other related components, ensuring the stability and reliability of the bearing during use.

[0039] As described above, the municipal road seismic bridge bearing of this invention not only effectively reduces wear on the friction pair during movement and improves the service life of the bearing, but also allows for flexible movement under extreme conditions such as earthquakes, thus providing excellent seismic resistance. Furthermore, the ease of lubricant application makes bearing maintenance simpler and more efficient.

[0040] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "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 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.

[0041] 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 seismic-resistant bridge bearing for municipal roads, comprising, from top to bottom, an upper bearing plate (1), a first sliding member (2), a second sliding member (3), and a lower bearing plate (4), wherein a first spherical friction pair is formed between the upper bearing plate (1) and the first sliding member (2), a second spherical friction pair is formed between the first sliding member (2) and the second sliding member (3), and a third spherical friction pair is formed between the second sliding member (3) and the lower bearing plate (4), characterized in that, The first spherical friction pair, the second spherical friction pair, and the third spherical friction pair are respectively provided with a first lubrication channel, a second lubrication channel, and a third lubrication channel for injecting lubricant.

2. The seismic-resistant bridge bearing for municipal roads according to claim 1, characterized in that, The upper surface of the first sliding member (2) is an outwardly convex spherical surface. The first lubrication channel includes a first collecting groove (5), a first stopping groove (6) and a plurality of first lubrication grooves (7) disposed on the upper surface of the first sliding member (2). The first collecting groove (5) and the first stopping groove (6) are respectively located in the middle and near the edge of the upper surface of the first sliding member (2). The first stopping groove (6) is annular. The plurality of first lubrication grooves (7) are radial. The first lubrication grooves (7) are used to connect the first collecting groove (5) and the first stopping groove (6).

3. The seismic-resistant bridge bearing for municipal roads according to claim 2, characterized in that, The first lubrication channel also includes an injection channel (8) disposed in the upper support plate (1). One end of the injection channel (8) is disposed on the side wall of the upper support plate (1) and communicates with the outside. The other end of the injection channel (8) is located at the upper end of the first collection groove (5). The injection channel (8) is used to inject lubricant.

4. The seismic-resistant bridge bearing for municipal roads according to claim 3, characterized in that, The lower surface of the first sliding member (2) is an outwardly convex spherical surface, and the upper surface of the second sliding member (3) is an inwardly concave spherical surface. The upper edge of the second sliding member (3) protrudes from the lower edge of the first lower sliding member. The second lubrication channel includes a plurality of second lubrication grooves (9) disposed on the upper surface of the second sliding member (3). The plurality of second lubrication grooves (9) are radial, and one end of the plurality of second lubrication grooves (9) is located at the center of the upper surface of the second sliding member (3) and is interconnected.

5. The seismic-resistant bridge bearing for municipal roads according to claim 4, characterized in that, The lower surface of the second sliding member (3) is an outwardly convex spherical surface. The third lubrication channel includes a second stop groove (10) and a plurality of third lubrication grooves (11). The second stop groove (10) is annular and located in the middle of the upper surface of the second sliding member (3). The plurality of third lubrication grooves (11) are radial, and one end of the plurality of third lubrication grooves (11) is connected to the second stop groove (10).

6. The seismic-resistant bridge bearing for municipal roads according to claim 5, characterized in that, The third spherical friction pair is locked by a locking component, which is released when subjected to a preset shear force.

7. The seismic-resistant bridge bearing for municipal roads according to claim 6, characterized in that, The locking component includes: The second sliding member (3) has a blind hole in the middle of its lower surface, and a threaded sleeve (12) is embedded in the blind hole. The threaded sleeve (12) is threadedly connected to the upper end of the locking member (13); and The lower support plate (4) has a through hole (14) in the middle, the through hole (14) is located inside the second stop groove (10), and the lower end of the locking member (13) passes through the through hole (14).

8. The seismic-resistant bridge bearing for municipal roads according to claim 7, characterized in that, The locking member (13) is a rotating body, and an annular pre-fracture opening (15) is provided in the middle of the locking member (13). The annular pre-fracture opening (15) is located at the connection between the blind hole and the through hole (14).

9. The seismic-resistant bridge bearing for municipal roads according to claim 8, characterized in that, The lower sidewall of the locking member (13) is provided with a pre-fracture member (16) at an equal angle. The pre-fracture member (16) abuts against the inner wall of the through hole (14). The through hole (14) is an inverted conical hole.

10. The seismic-resistant bridge bearing for municipal roads according to any one of claims 1 to 9, characterized in that, The first sliding member (2) and the second sliding member (3) are both rotating bodies, and the upper support plate (1) and the lower support plate (4) are both provided with connecting holes (17).

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