Anti-vibration pad device for rail transit bridge

Abstract

The utility model provides an anti-vibration pad device for a rail transit bridge. The anti-vibration pad device comprises a lower support and an upper support. A pressing block is arranged on the bottom face of the upper support, two sliding tables are symmetrically arranged on the top face of the lower support, and the two sliding tables are arranged on the two sides of the pressing block respectively and connected with the lower support in a sliding mode. The side, facing the pressing block, of the sliding table is provided with a first inclined face, and the two sides of the pressing block are each provided with a second inclined face in sliding connection with the first inclined face. Supporting arms extending upwards are arranged at the two ends of the lower support respectively, and damping springs are arranged between the supporting arms and the adjacent sliding tables. The top face of the lower support is further provided with a guide column, and the guide column extends upwards and is connected with a guide insertion hole formed in the bottom face of the pressing block in an inserted mode. The two symmetrical slope sliding tables jointly clamp the pressing block of the upper support under the action of the elastic force of the damping springs on the back sides of the sliding tables, vibration of a bridge can be effectively buffered through the damping springs, and the device can be more stable in the using process through cooperation of the guide columns and the guide insertion holes.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, specifically to a vibration damping pad device for rail transit bridges. Background Technology

[0002] When vehicles travel on bridge surfaces, coupling occurs between the vehicle and the bridge, causing vibrations. Therefore, vibration damping devices are needed to help reduce bridge vibration. A search revealed a patent application (application number 201820106840.X) that discloses a bridge vibration damping device with buffering capabilities. This device is installed between a bearing pad and the bridge body and includes: a steel plate fixedly mounted on the upper surface of the bearing pad; a damping pad mounted on the lower surface of the bridge body; a telescopic rod, one end of which passes through the steel plate and is fixed to the bearing pad, and the other end of which passes through the damping pad and is fixed to the bridge body; a damping spring sleeved on the telescopic rod, one end of which presses against the steel plate, and the other end of which presses against the damping pad; and a buffer device disposed between the steel plate and the damping pad.

[0003] However, during actual use, the applicant found that the PTFE rubber vibration damping pads installed on it and connected to the bottom of the bridge were only guided by the telescopic rods as the bridge moved towards the bottom steel plate. The structural strength was insufficient, which made the vibration damping device unstable during use. Utility Model Content

[0004] In view of the deficiencies in the prior art, this utility model provides a vibration damping pad device for rail transit bridges, which at least solves the technical problem of insufficient stability when existing bridge vibration damping devices are used.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A vibration damping pad device for rail transit bridges includes a lower support and an upper support. The bottom surface of the upper support is provided with a pressure block, and the top surface of the lower support is symmetrically provided with two sliding platforms, which are respectively located on both sides of the pressure block and slidably connected to the lower support. The sliding platforms have a first inclined surface facing the pressure block, and the pressure block has a second inclined surface on both sides that is slidably connected to the first inclined surface. The lower support also has upwardly extending support arms at both ends, and vibration damping springs are provided between the support arms and the adjacent sliding platforms. The top surface of the lower support is also provided with a guide post, which extends upward and is inserted into a guide hole on the bottom surface of the pressure block.

[0007] Optionally, the top surface of the lower support is further provided with a first permanent magnet, and the bottom surface of the pressure block is further provided with a second permanent magnet that is opposite to the position of the first permanent magnet, and the first permanent magnet and the second permanent magnet have the same magnetic pole.

[0008] Optionally, the top of the support arm is provided with a guide slot, and the bottom surface of the upper support is provided with a guide block that is inserted into the guide slot. The outer periphery of the guide block is also covered with a vibration damping sleeve.

[0009] Optionally, the upper support is further provided with downwardly extending side baffles at both ends, and the two side baffles accommodate the two arms.

[0010] Optionally, the side baffle is further provided with a limiting slider on the side facing the adjacent support arm, and the support arm is further provided with a limiting groove for accommodating the limiting slider on the side facing the adjacent side baffle.

[0011] Optionally, the upper support is further provided with protective plates on the front and rear sides, and the two protective plates are slidably connected to the two arms respectively.

[0012] Optionally, a guide rod is also threaded onto the support arm, and the damping spring is sleeved on the outer periphery of the guide rod.

[0013] As can be seen from the above technical solution, the beneficial effects of this utility model are:

[0014] 1) The upper support block is clamped by two symmetrical inclined slides under the elastic force of the damping springs on the back of the slides. The damping springs can effectively buffer the vibration of the bridge and reduce the damage caused by the vibration to the bridge.

[0015] 2) Through the cooperation of the limiting slider and the limiting groove, the cooperation of the guide block and the guide slot, and the cooperation of the guide column and the guide hole, the upper support can move downward smoothly with the vibration of the bridge, making the device more stable during use.

[0016] 3) By installing damping sleeves at the top of the support arms at both ends of the lower support, vibration can be directly reduced when the upper support is pressed down due to vibration.

[0017] 4) By installing side baffles and protective plates at both ends of the upper support and on both sides of the front and rear, the vibration damping structure between the two supports can be sealed, reducing the impact of dust, water vapor and other factors on the vibration damping structure.

[0018] 5) By setting up detachable protective plates, guide rods and guide columns with adjustable height, it is convenient for personnel to inspect / replace the vibration damping structure inside the lower support. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 A cross-sectional view of a vibration damping pad device for rail transit bridges;

[0021] Figure 2 A half-sectional view of a vibration damping pad device for rail transit bridges;

[0022] Figure 3 A partial cross-sectional view of a vibration damping pad device for rail transit bridges;

[0023] Figure label:

[0024] 1-Lower support, 2-Upper support, 3-Pressure block, 4-Slide table, 5-Vibration damping spring, 6-Guide column, 7-First permanent magnet, 8-Second permanent magnet, 9-Guide rod;

[0025] 11-Support arm, 12-Limiting slide groove, 21-Guide block, 22-Vibration damping sleeve, 23-Side baffle, 24-Limiting slider, 31-Guide hole. Detailed Implementation

[0026] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0027] Please see Figure 1-2This utility model provides a vibration damping pad device for rail transit bridges, including a lower support 1 and an upper support 2. The lower support 2 has a pressure block 3 on its bottom surface, and two sliding platforms 4 are symmetrically arranged on the top surface of the lower support 1. The two sliding platforms 4 are respectively located on both sides of the pressure block 3 and slidably connected to the lower support 1. Specifically, the pressure block 3 may have a slider / pulley at its bottom, and the lower support 1 may have a groove / rail on its top surface that matches the slider. A first inclined surface is provided on the side of the sliding platform 4 facing the pressure block 3, and a second inclined surface is provided on both sides of the pressure block 3, slidably connected to the first inclined surface. Both ends of the lower support 1 are also provided with upwardly extending support arms 11, and vibration damping springs 5 ​​are provided between the support arms 11 and adjacent sliding platforms 4. Obviously, multiple sets of vibration damping springs 5 ​​can be provided. Through the sliding connection of the inclined surfaces, the downward pressure can be effectively converted into horizontal thrust, thereby driving the sliding platforms 4 to slide and compress the vibration damping springs 5. The top of the support arm 11 is provided with a guide slot, and the bottom surface of the upper support 2 is provided with a guide block 21 that is inserted into the guide slot. The outer periphery of the guide block 21 is also covered with a vibration damping sleeve 22, which can be made of PTFE rubber. The top surface of the lower support 1 is provided with a guide post 6, which extends upward and is inserted into a guide hole 31 on the bottom surface of the pressure block 3. The cooperation between the guide post 6 and the guide hole 31, the cooperation between the guide block 21 and the guide slot, and the cooperation between the slide and the inclined surface of the pressure block enable the upper support 2 to move downward smoothly with the vibration of the bridge, making the device more stable during use.

[0028] As a further improvement to the above solution, the top surface of the lower support 1 is also provided with a first permanent magnet 7, and the bottom surface of the pressure block 3 is also provided with a second permanent magnet 8 opposite to the first permanent magnet 7, and the first permanent magnet 7 and the second permanent magnet 8 have the same magnetic poles. The magnetic repulsion formed by the first permanent magnet 7 and the second permanent magnet 8 with the same magnetic poles prevents the upper support 2 from moving downward, thereby further reducing vibration. In this application, both permanent magnets are respectively sleeved on the outer periphery of the guide post 6. However, permanent magnets will fail under certain conditions. For example, if a permanent magnet is exposed to extreme temperature fluctuations, humidity, or corrosive environments for a long time, its magnetism will gradually weaken. To facilitate the replacement of permanent magnets, the bottom end of the guide post 6 is threaded to the lower support 1, and after the guide post 6 is installed in the working position, its bottom surface should leave a maintenance gap with the bottom surface of the lower support 1. That is, when it is necessary to replace a permanent magnet, the guide post 6 can be screwed downward to the maintenance position so that the top end of the guide post 6 is at least detached from the second permanent magnet 8, and then either permanent magnet can be replaced.

[0029] As a further improvement to the above solution, the upper support 2 is further provided with downwardly extending side baffles 23 at both its left and right ends, and the two side baffles 23 accommodate the two support arms 11. By providing the side baffles 23, on the one hand, the vibration damping structure between the support arms 11 and the upper support 2 can be effectively sealed off. On the other hand, a limiting sliding structure can also be provided between the side baffles 23 and the support arms 11—see [link to relevant documentation] Figure 3 The side baffle 23 facing the adjacent support arm 11 is also provided with a limiting slider 24, and the limiting slider 24 is detachably connected to the side baffle 23. The support arm 11 facing the adjacent side baffle 23 is also provided with a limiting groove 12 for accommodating the limiting slider 24. Obviously, relying solely on the side baffle 23 cannot effectively seal the entire vibration damping structure, and therefore the front and rear sides of the upper support 2 also need to be provided with sealing structures. In this application, protective plates (not shown in the figure) are provided on the front and rear sides of the upper support 2. The two protective plates are slidably connected to the two support arms 11 respectively. The bottom of the protective plate needs to be lower than the bottom of the inner side of the lower support 1. Through the cooperation of the upper support 2, the side baffle 23 and the protective plates, the entire vibration damping structure can be sealed, reducing the impact of dust on the vibration damping structure.

[0030] As a further improvement to the above solution, a guide rod 9 is threadedly connected to the support arm 11, and the damping spring 5 is sleeved on the outer circumference of the guide rod 9. When the guide rod 9 is in place, it can limit and guide the setting direction of the damping spring 5. Since springs gradually lose their elasticity due to various reasons during use, they eventually fail. The main causes of failure include fatigue fracture, material aging, corrosion failure, and excessive stress, etc., requiring regular inspection and replacement. When it is necessary to replace the damping spring 5, simply remove the protective plate, then unscrew the guide rod 9 to release its limiting and guiding effect on the spring, and the old spring can be directly removed from between the support arm 11 and the slide table 4. When replacing the new spring, it is recommended to use tools to pre-compress the new spring, and remove the tools after the new spring is placed in place and the guide rod 9 is re-inserted. To ensure safety, when replacing the spring, it is recommended to use tools such as jacks to first pry open and fix the upper support 2 and the lower support 1.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A rail transit bridge vibration reduction pad device, characterized in that, It includes a lower support (1) and an upper support (2); the bottom surface of the upper support (2) is provided with a pressure block (3), and the top surface of the lower support (1) is symmetrically provided with two slides (4), the two slides (4) are respectively located on both sides of the pressure block (3) and are slidably connected to the lower support (1); the slides (4) are provided with a first inclined surface on the side facing the pressure block (3), and the pressure block (3) is provided with a second inclined surface on both sides, which is slidably connected to the first inclined surface; the two ends of the lower support (1) are also provided with upwardly extending support arms (11), and a damping spring (5) is provided between the support arm (11) and the adjacent slide (4); the top surface of the lower support (1) is also provided with a guide post (6), the guide post (6) extends upward and is inserted into the guide insertion hole (31) opened on the bottom surface of the pressure block (3).

2. The rail transit bridge damping pad device of claim 1, wherein, The top surface of the lower support (1) is also provided with a first permanent magnet (7), and the bottom surface of the pressure block (3) is also provided with a second permanent magnet (8) that is opposite to the position of the first permanent magnet (7), and the first permanent magnet (7) and the second permanent magnet (8) have the same magnetic pole.

3. The rail transit bridge damping pad device of claim 1, wherein, The top of the support arm (11) is provided with a guide slot, and the bottom surface of the upper support (2) is provided with a guide block (21) that is inserted into the guide slot. The outer periphery of the guide block (21) is also covered with a vibration damping sleeve (22).

4. The rail transit bridge damping pad device of claim 1, wherein, The upper support (2) is provided with downward extending side baffles (23) at both ends, and the two side baffles (23) accommodate the two arms (11).

5. The rail transit bridge damping pad device of claim 4, wherein, The side baffle (23) facing the adjacent support arm (11) is also provided with a limiting slider (24), and the support arm (11) facing the adjacent side baffle (23) is also provided with a limiting groove (12) for accommodating the limiting slider (24).

6. A rail transit bridge damping pad device according to any one of claims 1-5, characterized in that, The upper support (2) is also provided with protective plates on the front and rear sides, and the two protective plates are slidably connected to the two arms (11) respectively.

7. The rail transit bridge vibration damping pad device of claim 6, wherein, The support arm (11) is also threaded with a guide rod (9), and the damping spring (5) is sleeved on the outer periphery of the guide rod (9).

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