Bridge overload protection type sliding support

Abstract

The utility model provides a kind of bridge overload protection type sliding support, the bridge overload protection type sliding support includes lower support, upper support, viscous damper, connecting piece and friction component.The utility model is connected with connecting piece on sleeve pipe or piston rod, and connecting piece is used to install to the upper support or lower support of piston rod or sleeve pipe corresponding.On the friction component for increasing friction between connecting piece and upper support or lower support is provided.The application, in the use process, upper support and lower support are relative to the telescopic displacement for guaranteeing bridge stable movement in first direction.And when bridge displacement process is stressed to be larger, and greater than the friction between connecting piece and upper support or lower support, connecting piece will be moved relative to upper support and lower support to further play the role of damping, can offset part of the force between upper support and lower support.Making viscous damper can operate stably, and avoid relevant connecting component damage.

Description

Technical Field

[0001] This utility model belongs to the field of damper technology, specifically relating to a bridge overload protection sliding bearing. Background Technology

[0002] Bridges are subject to expansion and contraction due to temperature differences. Therefore, during bridge construction, sliding bearings are typically used to accommodate these expansion and contraction caused by temperature variations. Viscous dampers are installed on these sliding bearings, and their design helps to dissipate energy and reduce vibrations during earthquakes or wind-induced vibrations.

[0003] Currently, the damping force of viscous dampers is velocity-dependent; the higher the velocity, the greater the damping. However, when the damping force exceeds a certain limit, it can cause damage to the sliding bearing or related connecting components within the viscous damper. This affects the service life of the sliding bearing and its safety performance during use. Utility Model Content

[0004] This utility model provides a bridge overload protection sliding bearing, which aims to solve the problem that existing bridge sliding bearings cannot provide overload protection when the external force is large, thus affecting the service life and safety performance of connecting components and dampers.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a bridge overload protection sliding bearing, comprising: Lower support; An upper support is slidably disposed on the lower support, and the sliding direction of the upper support on the lower support is defined as a first direction; A viscous damper includes a sleeve and a piston rod slidably disposed inside the sleeve, wherein the sleeve and the piston rod are respectively connected to the lower support and the upper support; A connector is slidably disposed on the lower support or the upper support along a first direction, and the piston rod or the sleeve is connected to the lower support or the upper support through the connector; A friction assembly is disposed between the connector and the lower support or the upper support to increase the frictional force between the connector and the lower support or the upper support.

[0006] In one possible implementation, both the sleeve and the piston rod are connected to the upper support or the lower support respectively via the connector.

[0007] In one possible implementation, the friction assembly includes: The first friction plate is fixedly installed on the upper support or the lower support; A clamping bolt is threaded to the upper support or the lower support to clamp the connector onto the upper support or the lower support. The connector is provided with an elongated hole for avoiding the clamping bolt, and the length direction of the elongated hole is set along a first direction.

[0008] In one possible implementation, the friction assembly further includes: A pressure plate is installed on the side of the connector away from the first friction plate. A second friction plate is provided on the side of the pressure plate close to the connector. The pressure plate is provided with a through hole for installing the clamping bolt.

[0009] In one possible implementation, the sleeve is hinged to the lower support, and the end of the piston rod is connected to the connector, which is mounted on the upper support.

[0010] In one possible implementation, a pin is inserted into the connector, and when the piston rod or the sleeve is connected to the connector, it is hinged to the pin.

[0011] In one possible implementation, the friction assembly includes: The fixing plates are at least two in number and are fixedly installed on the upper support or the lower support. Adjacent fixing plates are spaced apart, and the connecting member includes a movable plate located between two adjacent fixing plates. The movable plate is used to connect to the sleeve or the piston rod. The third friction pad is fixedly installed on both sides of the movable plate; A tightening assembly is disposed between the fixed plate and the movable plate for tightening the movable plate inside the two adjacent fixed plates.

[0012] In one possible implementation, the tightening component includes: A tightening bolt is provided, which passes through the fixed plate and the movable plate. The fixed plate is provided with an elongated hole for avoiding the tightening bolt. Tighten the nut and connect it to the tightening bolt via threads.

[0013] In one possible implementation, the sleeve is fixedly mounted on the upper support, both ends of the piston rod pass through the sleeve, and both ends of the piston rod are connected to the lower support via the connector.

[0014] In one possible implementation, a piston is slidably mounted inside the sleeve at the middle of the piston rod, and in the free state, the piston is located at the middle of the sleeve.

[0015] The solution shown in this application, compared with the prior art, incorporates an upper support and a lower support that can slide relative to each other along a first direction. A viscous damper is also installed between the upper and lower supports. The viscous damper includes a piston rod and a sleeve that can slide relative to each other, achieving a damping effect through the piston rod and sleeve. This application uses a connector to connect the sleeve or piston rod, which is used to install onto the corresponding upper or lower support. A friction assembly is provided between the connector and the upper or lower support to increase friction. In use, the upper and lower supports move relative to each other along the first direction to ensure stable bridge expansion and contraction. When the force on the bridge increases during displacement and exceeds the friction between the connector and the upper or lower support, the connector moves relative to the upper and lower supports to further dampen the bridge, offsetting part of the force between the upper and lower supports. This ensures stable operation of the viscous damper and prevents damage to related connecting components. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the first embodiment of the bridge overload protection sliding bearing provided in this utility model embodiment; Figure 2 A schematic diagram of the installation structure of the connector in the first embodiment of this utility model; Figure 3 This is a structural schematic diagram of a second embodiment of the bridge overload protection sliding bearing provided by this utility model. Figure 4 A schematic diagram of the installation structure of the connector in the second embodiment of this utility model; Figure 5 This is a structural schematic diagram of a third embodiment of the bridge overload protection sliding bearing provided by this utility model. Explanation of reference numerals in the attached figures: 1. Lower support; 2. Upper support; 3. Viscous damper; 31. Sleeve; 32. Piston rod; 321. Pin; 322. Piston; 4. Connector; 5. Friction assembly; 51. First friction plate; 52. Clamping bolt; 53. Pressure plate; 54. Second friction plate; 55. Fixing plate; 56. Third friction plate; 57. Tightening assembly; 571. Tightening bolt; 572. Tightening nut. Detailed Implementation

[0017] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] Please refer to the following: Figures 1 to 5 The present invention provides a bridge overload protection sliding bearing. The bridge overload protection sliding bearing includes a lower bearing 1, an upper bearing 2, a viscous damper 3, a connecting member 4, and a friction assembly 5. The upper bearing 2 is slidably disposed on the lower bearing 1, and the sliding direction of the upper bearing 2 on the lower bearing 1 is defined as a first direction. The viscous damper 3 includes a sleeve 31 and a piston rod 32 slidably disposed inside the sleeve 31, with the sleeve 31 and piston rod 32 respectively connected to the lower bearing 1 and the upper bearing 2. The connecting member 4 is slidably disposed on the lower bearing 1 or the upper bearing 2 along the first direction, and the piston rod 32 or the sleeve 31 is connected to the lower bearing 1 or the upper bearing 2 through the connecting member 4. The friction assembly 5 is disposed between the connecting member 4 and the lower bearing 1 or the upper bearing 2 to increase the frictional force between the connecting member 4 and the lower bearing 1 or the upper bearing 2.

[0019] The bridge overload protection sliding bearing provided in this embodiment, compared with the prior art, features an upper bearing 2 and a lower bearing 1 that can slide relative to each other along a first direction. A viscous damper 3 is also installed between the upper bearing 2 and the lower bearing 1. The viscous damper 3 includes a piston rod 32 and a sleeve 31 that can slide relative to each other, achieving a damping effect through the piston rod 32 and the sleeve 31. This application includes a connector 4 connected to the sleeve 31 or the piston rod 32, which is used to install onto the corresponding upper bearing 2 or lower bearing 1. A friction assembly 5 for increasing friction is provided between the connector 4 and the upper bearing 2 or lower bearing 1. In use, the upper bearing 2 and the lower bearing 1 move relative to each other along the first direction to ensure the stable expansion and contraction displacement of the bridge. When the force on the bridge increases during displacement and exceeds the frictional force between the connector 4 and the upper support 2 or the lower support 1, the connector 4 will move relative to the upper support 2 and the lower support 1 to provide further damping, which can offset part of the force between the upper support 2 and the lower support 1. This allows the viscous damper 3 to operate stably and avoids damage to related connecting components.

[0020] Specifically, in this embodiment, the connector 4 is connected to the upper support 2 or the lower support 1 via the friction assembly 5, which can increase the friction between the connector 4 and the friction assembly 5. The viscous damper 3 is a speed-dependent vibration damping product. Theoretically, the faster the speed, the greater the damping force. When the damping force exceeds a certain limit, friction damping between the connector 4 and the upper support 2 or the lower support 1 is used. Friction damping has the characteristic of constant force, thus achieving the feature of upper limit protection of damping force.

[0021] In some embodiments, the connector 4 described above may be as follows: Figure 2 The structure shown. See also Figure 2Both the sleeve 31 and the piston rod 32 are connected to the upper support 2 or the lower support 1 via connecting parts 4. Connecting parts 4 are attached to the ends of both the sleeve 31 and the piston rod 32. The two connecting parts 4 are respectively connected to the upper support 2 and the lower support 1, and are slidably disposed on the upper support 2 or the lower support 1, with the friction assembly 5 increasing the relative frictional force. By connecting connecting parts 4 to both the sleeve 31 and the piston rod 32, the overall travel distance of the viscous damper 3 relative to the upper support 2 and the lower support 1 can be increased.

[0022] Specifically, in this embodiment, ear plates are fixedly installed at the ends of both the sleeve 31 and the piston rod 32, a slot for installing the ear plates is provided on the connector 4, and a pin 321 for passing through the slot and the ear plates is inserted into the connector 4.

[0023] Preferably, in this embodiment, the length direction of the upper support 2 is defined as the first direction, and the width direction of the upper support 2 is defined as the second direction. Two viscous dampers 3 are installed between the upper support 2 and the lower support 1. The two viscous dampers 3 are arranged parallel to each other at intervals along the second direction, and the same number of connecting pieces 4 are connected to each of the two viscous dampers 3, which are then connected to the upper support 2 or the lower support 1 through the connecting pieces 4. This ensures that the forces on both sides of the upper support 2 and the lower support 1 along their width direction are balanced.

[0024] In some embodiments, the friction component 5 described above may employ, for example... Figure 2 The structure shown. See also Figure 2 The friction assembly 5 includes a first friction plate 51 and a clamping bolt 52. The first friction plate 51 is fixedly mounted on the upper support 2 or the lower support 1; the clamping bolt 52 is threadedly connected to the upper support 2 or the lower support 1 and is used to press the connecting member 4 onto the upper support 2 or the lower support 1. The connecting member 4 is provided with an elongated hole for avoiding the clamping bolt 52, and the length direction of the elongated hole is arranged along a first direction. The first friction plate 51 is located on the outer surface of the connecting member 4, and when the connecting member 4 is connected to the upper support 2 or the lower support 1, the first friction plate 51 is located between the upper support 2 or the lower support 1 and the connecting member 4, and the clamping bolt 52 can press the first friction plate 51 between the upper support 2 or the lower support 1 and the connecting member 4, thereby increasing the frictional force between the connecting member 4 and the upper support 2 or the lower support 1.

[0025] Specifically, in this embodiment, an elongated hole for avoiding the clamping bolt 52 is provided on the connector 4. The length direction of the elongated hole is arranged along the first direction. The connector 4 is connected to the piston rod 32 or sleeve 31 of the viscous damper 3, and the connector 4 can move relative to the upper support 2 or the lower support 1 along the first direction. Thus, when the relative force between the upper support 2 and the lower support 1 is large, the constant force can be offset by the frictional damping between the connector 4 and the upper support 2 or the lower support 1, thereby improving the stability of the viscous damper 3 during use and the safety between the connectors 4.

[0026] In some embodiments, the friction component 5 described above may employ, for example... Figure 2 The structure shown. See also Figure 2 The friction assembly 5 also includes a pressure plate 53. The pressure plate 53 is installed on the side of the connector 4 away from the first friction plate 51, and a second friction plate 54 is provided on the side of the pressure plate 53 close to the connector 4. The pressure plate 53 has a through hole for installing the clamping bolt 52. In this embodiment, a first friction plate 51 and a second friction plate 54 are respectively provided on both sides of the connector 4. The first friction plate 51 is fixedly installed on the corresponding upper support 2 or lower support 1 of the connector 4. The second friction plate 54 is fixedly installed on the side of the pressure plate 53. Thus, when the pressure plate 53 is pressed against the connector 4, the first friction plate 51 and the second friction plate 54 are respectively provided on both sides of the connector 4. By setting the pressure plate 53, damage to the connector 4 by the clamping bolt 52 during the clamping process can be avoided, and the frictional force between the connector 4 and the upper support 2 or lower support 1 can be increased.

[0027] Preferably, in this embodiment, an elastic pressure plate is also provided on the outside of the pressure plate 53, and the clamping bolt 52 abuts against the elastic pressure plate to reduce the loosening of the clamping bolt 52, thereby improving the stability of the extrusion force on the pressure plate 53.

[0028] Preferably, in this embodiment, baffles for limiting the movement of the second friction plate 54 or the first friction plate 51 along the first direction are fixedly installed on the pressure plate 53, the upper support 2, and the lower support 1. Simultaneously, within the stroke range of the connecting member 4 on the upper support 2 or the lower support 1, the first friction plate 51 and the second friction plate 54 are always integrally located on the side of the connecting member 4, thereby ensuring stable friction.

[0029] In some embodiments, the piston rod 32 may be as follows: Figure 3 The structure shown. See also Figure 3The sleeve 31 is hinged to the lower support 1, and the end of the piston rod 32 is connected to a connector 4, which is mounted on the upper support 2. The sleeve 31 on the viscous damper 3 is hinged to the lower support 1, and the connector 4 has a threaded hole for mounting the piston rod 32, which is threadedly connected to the connector 4. The positions of the piston rod 32 on the two viscous dampers 3 along the second direction on the lower support 1 are opposite along the first direction. By providing a connector 4 on one side of the viscous damper 3, on-site installation space can be saved. Simultaneously, the friction between the connector 4 and the upper support 2 or the lower support 1 can be increased by increasing the length of the connector 4 and the first friction plate 51 and the second friction plate 54.

[0030] Preferably, in this embodiment, a plurality of clamping bolts 52 are installed on the connector 4. The plurality of clamping bolts 52 are arranged in parallel at intervals along the first direction, thereby ensuring the stability of the frictional force during the movement of the connector 4 relative to the lower support 1 or the upper support 2.

[0031] In some embodiments, the connector 4 described above may be as follows: Figure 2 The structure shown. See also Figure 2 A pin 321 is inserted into the connector 4. When the piston rod 32 or sleeve 31 is connected to the connector 4, it is hinged to the pin 321. The connector 4 is hinged to the piston rod 32 or sleeve 31 via the pin 321. This connection facilitates the installation of the viscous damper 3 and prevents the piston rod 32 from bending and deforming under lateral forces, thus improving stability during use.

[0032] Preferably, in this embodiment, both the piston rod 32 and the end of the sleeve 31 are connected to a connector 4, and the axes of the piston rod 32 and the corresponding pins 321 on the sleeve 31 are perpendicular to each other. This allows for the cancellation of lateral forces in multiple directions.

[0033] In some embodiments, the friction component 5 described above may employ, for example... Figure 4 The structure shown. See also Figure 4The friction assembly 5 includes a fixed plate 55, a third friction plate 56, and a tightening assembly 57. There are at least two fixed plates 55, which are fixedly mounted on the upper support 2 or the lower support 1. Adjacent fixed plates 55 are spaced apart, and the connecting member 4 includes a movable plate located between the two adjacent fixed plates 55. The movable plate is used to connect to the sleeve 31 or the piston rod 32. The third friction plate 56 is fixedly mounted on both sides of the movable plate. The tightening assembly 57 is disposed between the fixed plates 55 and the movable plate, and is used to tighten the movable plate inside the two adjacent fixed plates 55. Two spaced-apart fixed plates 55 are fixedly mounted on the upper support 2 or the lower support 1, and the movable plate on the connecting member 4 is slidably disposed between the two fixed plates 55. The third friction plate 56 is fixedly mounted on both sides of the movable plate. Both fixed plates 55 have a certain degree of elastic deformation. The movable plate is located between the two fixed plates 55, and the tightening assembly 57 can tighten the movable plate between the two fixed plates 55, thereby increasing the friction between the movable plate and the fixed plates 55. At the same time, it can make a stable compressive force between the moving plate and the fixed plate 55, and make a stable frictional force between the moving plate and the fixed plate 55.

[0034] In some embodiments, the tightening component 57 may employ, for example... Figure 4 The structure shown. See also Figure 4 The tightening assembly 57 includes a tightening bolt 571 and a tightening nut 572. The tightening bolt 571 passes through the fixed plate 55 and the movable plate. The fixed plate 55 has an elongated hole for avoiding the tightening bolt 571. The tightening nut 572 is threadedly connected to the tightening bolt 571. The tightening bolt 571 and the tightening nut 572 are threaded together. A disc spring is also provided on the outer side of the fixed plate 55 corresponding to the tightening bolt 571 and the tightening nut 572 to reduce the loosening of the tightening nut 572. Simultaneously, the area of ​​the disc spring is larger than that of the tightening nut 572, increasing the contact area with the fixed plate 55, ensuring even force distribution on multiple points of the fixed plate 55, and guaranteeing stable friction.

[0035] In some embodiments, the viscous damper 3 described above can be employed as follows: Figure 5 The structure shown. See also Figure 5The sleeve 31 is fixedly installed on the upper support 2. Both ends of the piston rod 32 pass through the sleeve 31 and are connected to the lower support 1 via connectors 4. An intermediate support body extends from the upper support 2 towards the lower support 1. The sleeve 31 is fixedly installed on the intermediate support body. Two baffles are fixedly installed on the intermediate support body, with the sleeve 31 located between the two baffles, and both ends of the sleeve 31 fixedly installed on the inner sides of the two baffles. This effectively limits the position of the sleeve 31. The piston rod 32 passes through the sleeve 31, and sealing plugs that seal against the inner wall of the sleeve 31 are installed at both ends of the sleeve 31. The piston rod 32 slides against the sealing plugs and is sealed to them. When subjected to external force, the upper support 2 moves relative to the lower support 1 in a first direction, while the piston rod 32 moves relative to the sleeve 31 and acts as a buffer. When the external force increases, the friction damping formed by the connecting parts 4 at both ends of the piston rod 32 and the lower support 1 absorbs part of the force, ensuring the stability of the upper support 2 and the lower support 1 during the relative displacement process.

[0036] In some embodiments, the piston rod 32 may be as follows: Figure 5 The structure shown. See also Figure 5 A piston 322 is slidably mounted inside the sleeve 31 at the middle of the piston rod 32. In the free state, the piston 322 is located at the middle of the sleeve 31. In the free state, the piston 322 is located at the middle of the sleeve 31, so that it can exert a damping force in two directions parallel to the first direction.

[0037] Preferably, in this embodiment, the connecting parts 4 at both ends of the piston rod 32 are installed on the lower support 1 by means of tightening bolts 571 or clamping bolts 52. Furthermore, the connecting parts 4 are provided with elongated holes for avoiding the tightening bolts 571 or clamping bolts 52. In the free state, the tightening bolts 571 or clamping bolts 52 are located in the middle of the elongated holes.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bridge overload protection sliding bearing, characterized in that, include: Lower support (1); The upper support (2) is relatively slidably disposed on the lower support (1), and the sliding direction of the upper support (2) on the lower support (1) is defined as the first direction; The viscous damper (3) includes a sleeve (31) and a piston rod (32) slidably disposed inside the sleeve (31). The sleeve (31) and the piston rod (32) are respectively connected to the lower support (1) and the upper support (2). The connector (4) is slidably disposed on the lower support (1) or the upper support (2) in the first direction, and the piston rod (32) or the sleeve (31) is connected to the lower support (1) or the upper support (2) through the connector (4); Friction assembly (5) is disposed between the connector (4) and the lower support (1) or the upper support (2) to increase the friction force between the connector (4) and the lower support (1) or the upper support (2).

2. The bridge overload protection sliding bearing as described in claim 1, characterized in that, The sleeve (31) and the piston rod (32) are both connected to the upper support (2) or the lower support (1) respectively via the connector (4).

3. The bridge overload protection sliding bearing as described in claim 1 or 2, characterized in that, The friction assembly (5) includes: The first friction plate (51) is fixedly installed on the upper support (2) or the lower support (1); A clamping bolt (52) is threadedly connected to the upper support (2) or the lower support (1) to press the connector (4) onto the upper support (2) or the lower support (1). The connector (4) is provided with an elongated hole for avoiding the clamping bolt (52), and the length direction of the elongated hole is set along a first direction.

4. The bridge overload protection sliding bearing as described in claim 3, characterized in that, The friction assembly (5) also includes: A pressure plate (53) is installed on the side of the connector (4) away from the first friction plate (51). A second friction plate (54) is provided on the side of the pressure plate (53) close to the connector (4). A through hole for installing the clamping bolt (52) is provided on the pressure plate (53).

5. The bridge overload protection sliding bearing as described in claim 1, characterized in that, The sleeve (31) is hinged on the lower support (1), and the end of the piston rod (32) is connected to the connector (4), which is installed on the upper support (2).

6. The bridge overload protection sliding bearing as described in claim 1 or 2, characterized in that, A pin (321) is inserted into the connector (4), and when the piston rod (32) or the sleeve (31) is connected to the connector (4), it is hinged to the pin (321).

7. The bridge overload protection sliding bearing as described in claim 3, characterized in that, The friction assembly (5) includes: The number of fixing plates (55) is at least two. The fixing plates (55) are fixedly installed on the upper support (2) or the lower support (1). The two adjacent fixing plates (55) are spaced apart. The connecting member (4) includes a movable plate located between the two adjacent fixing plates (55). The movable plate is used to connect to the sleeve (31) or the piston rod (32). The third friction plate (56) is fixedly installed on both sides of the movable plate; A tightening assembly (57) is disposed between the fixed plate (55) and the movable plate for tightening the movable plate inside the two adjacent fixed plates (55).

8. The bridge overload protection sliding bearing as described in claim 7, characterized in that, The tightening assembly (57) includes: A tightening bolt (571) is provided, which penetrates the fixed plate (55) and the movable plate. The fixed plate (55) is provided with an elongated hole for avoiding the tightening bolt (571). The tightening nut (572) is threadedly connected to the tightening bolt (571).

9. The bridge overload protection sliding bearing as described in claim 1, characterized in that, The sleeve (31) is fixedly installed on the upper support (2), and both ends of the piston rod (32) are provided through the sleeve (31), and both ends of the piston rod (32) are connected to the lower support (1) through the connector (4).

10. The bridge overload protection sliding bearing as described in claim 9, characterized in that, A piston (322) is slidably disposed inside the sleeve (31) at the middle of the piston rod (32). In the free state, the piston (322) is located at the middle of the sleeve (31).

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