Bridge expansion joint

Abstract

The utility model discloses a bridge expansion device for bridge building, including side beam, adjusting box, both sides fixedly connected with spring between side beam, both sides side beam two ends face one side and are opened to have the adjusting hole, the inside rotation is connected with first bevel gear in adjusting box middle side, first bevel gear tail end penetrates and is fixedly connected with the rotating cap of adjusting box, both sides of first bevel gear are connected with second bevel gear, second bevel gear tail end fixedly connected with the lead screw, the lead screw rotation is connected in adjusting box inside, the outside screw thread of lead screw is connected with the moving plate, both sides moving plate opposite side fixedly connected with two groups of push board, push board other end fixedly connected with the contact plate matched with adjusting hole, can according to the actual width of reservation groove adjust the installation width of expansion device, prevent the change of reservation groove width due to environmental change, make expansion device unable normal installation.

Description

Technical Field

[0001] This utility model relates to the field of bridge expansion joints, specifically a bridge expansion joint for bridge construction. Background Technology

[0002] During the construction of a bridge, expansion joints need to be installed between the two sections of the bridge body to maintain the strength of the bridge and meet the needs of thermal expansion and contraction. Expansion joints are devices that are usually installed between the ends of two beams, between the beam end and the abutment, or at the hinged joints of the bridge to meet the requirements of bridge deck deformation.

[0003] Bridges are typically designed with pre-drilled slots to facilitate the installation of expansion joints. However, the width of these slots is usually set based on a stable environment of 20 degrees Celsius. But the actual construction temperature can change, causing the width of the slots to change, which can affect the normal installation of the expansion joints. Utility Model Content

[0004] The purpose of this utility model is to provide a bridge expansion joint for bridge construction, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bridge expansion joint for bridge construction, comprising side beams and an adjustment box, with springs fixedly connected between the two side beams, and several sets of connecting plates fixedly connected to opposite sides of the two side beams, with adjustment holes opened at both ends of the two side beams facing one side, a first bevel gear rotatably connected inside the adjustment box, a rotating cap fixedly connected to the tail end of the first bevel gear penetrating the adjustment box, second bevel gears meshing on both sides of the first bevel gear, a lead screw fixedly connected to the tail end of the second bevel gear, the lead screw rotatably connected inside the adjustment box, a moving plate threadedly connected to the outer side of the lead screw, two sets of pushing plates fixedly connected to opposite sides of the two moving plates, and a contact plate matching the adjustment hole fixedly connected to the other end of the pushing plate.

[0006] Preferably, limiting sleeves are fitted on the outer sides of both ends of the spring, and the limiting sleeves are fixedly connected to the inside of the side beam. A damping rod is fitted inside the spring, and the two ends of the damping rod are fixedly connected to the side beam.

[0007] Preferably, an isolation plate is fixedly connected inside the adjustment box, and the lead screw is rotatably connected inside the isolation plate.

[0008] Preferably, a limiting plate is fixedly connected inside the adjustment box, and the limiting plate is slidably connected inside the moving plate.

[0009] Preferably, the side beam has a connecting hole that communicates with the adjustment hole, the connecting hole has several sets of height holes, a support platform is slidably connected inside the connecting hole, and a fixing screw that matches the height holes is threadedly connected inside the support platform.

[0010] Preferably, an installation rod is fixedly connected to the upper part of the adjustment box, a protective plate is fixedly connected to the upper part of the installation rod, a first connecting seat is fixedly connected to the outer sides of both ends of the protective plate, an outer baffle is slidably connected between the first connecting seats, an inner baffle is slidably connected to the inner side baffle, and a second connecting seat is fixedly connected to the upper part of the side beam.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model rotates the rotating cap, the first bevel gear drives the second bevel gear to rotate, the screw rotates and drives the moving plates on both sides to move, and the push plate drives the contact plate to push the adjusting holes on both sides, thereby changing the distance between the two side beams. Thus, the distance between the two side beams can be adjusted according to the width of the reserved groove. After the side beams are installed, the installation width of the telescopic device can be adjusted according to the actual width of the reserved groove, preventing the telescopic device from being unable to be installed properly due to changes in the reserved groove width caused by environmental changes.

[0013] 2. This utility model also supports the height of the adjustment box by inserting the push plates on both sides into the connecting holes and fixing the support platform in the holes at different heights with the fixing screws. When the height of the adjustment box changes, the protective plate moves up and down by the mounting rod. The outer baffle rotates around the first connecting seat, so that one end of the inner baffle moves along the inside of the outer baffle and the other end rotates around the second connecting seat. The outer baffle and the inner baffle on both sides can cover the two sides of the protective plate, ensuring that the upper protective plate can be adjusted according to the height of the reserved groove, and that no impurities enter the inside of the side beam. Attached Figure Description

[0014] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a second-view three-dimensional structural cross-sectional view of the present invention;

[0016] Figure 3 This is a schematic diagram of the contact plate structure from a third-view perspective of this utility model;

[0017] Figure 4 This is a schematic diagram of the fourth-view support platform structure of this utility model;

[0018] Figure 5 This is a cross-sectional view of the fifth-view adjustment box structure of this utility model.

[0019] In the diagram: 1. Side beam; 2. Limiting cylinder; 3. Spring; 4. Damping rod; 5. Connecting plate; 6. Adjusting hole; 7. Connecting hole; 8. Adjusting box; 9. First bevel gear; 10. Second bevel gear; 11. Rotating cap; 12. Isolation plate; 13. Lead screw; 14. Moving plate; 15. Pushing plate; 16. Contact plate; 17. Limiting plate; 18. Height hole; 19. Support platform; 20. Fixing screw; 21. Mounting rod; 22. Protective plate; 23. First connecting seat; 24. Outer baffle; 25. Inner baffle; 26. Second connecting seat. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1-5 This utility model provides a technical solution: a bridge expansion joint for bridge construction, comprising a side beam 1 and an adjustment box 8. Springs 3 are fixedly welded between the two side beams 1. Several sets of connecting plates 5 are fixedly connected to opposite sides of the two side beams 1. The side beams 1 are installed in pre-reserved slots in the bridge. The connecting plates 5 on both sides are connected to pre-reserved reinforcing bars. Adjustment holes 6 are opened at both ends of the two side beams 1 facing one side. A first bevel gear 9 is rotatably installed inside the adjustment box 8. A rotating cap 11 is fixedly welded to the tail end of the first bevel gear 9 through the adjustment box 8. Second bevel gears are meshed on both sides of the first bevel gear 9. Gear 10, the tail end of the second bevel gear 10 is fixedly welded with a lead screw 13, the lead screw 13 is rotatably connected to the inside of the adjustment box 8, the outer side of the lead screw 13 is threadedly connected with a moving plate 14, two sets of push plates 15 are fixedly welded to the opposite side of the two moving plates 14, the other end of the push plate 15 is fixedly welded with a contact plate 16 that matches the adjustment hole 6, by rotating the rotating cap 11, the first bevel gear 9 drives the second bevel gear 10 to rotate, the lead screw 13 rotates and drives the two moving plates 14 to move, the push plate 15 drives the contact plate 16 to push the two adjustment holes 6, thereby changing the distance between the two side beams 1;

[0022] Limiting sleeves 2 are fitted on the outer sides of both ends of spring 3. The limiting sleeves 2 are fixedly welded to the inside of the side beam 1 to prevent spring 3 from being compressed and deformed. A damping rod 4 is fitted inside spring 3. The two ends of the damping rod 4 are fixedly welded to the side beam 1 to prevent spring 3 from causing the side beam 1 to sway back and forth. An isolation plate 12 is fixedly welded inside the adjusting box 8. The lead screw 13 is rotatably installed inside the isolation plate 12 to prevent the moving plate 14 from contacting the bevel gear. A limiting plate 17 is fixedly welded inside the adjusting box 8. The limiting plate 17 is slidably installed inside the moving plate 14 to prevent the lead screw 13 from causing the moving plate 14 to rotate. A connecting hole 7 communicating with the adjusting hole 6 is opened inside the side beam 1. Several sets of height holes 18 are opened inside the connecting hole 7. A support platform 19 is slidably installed inside the connecting hole 7. A fixing screw 20 that matches the height hole 18 is threaded inside the support platform 19. After the side beam 1 is installed, the pushing plates 15 on both sides are inserted into the connecting hole 7 and the fixing screw 20 is used to fix the side beam 1. The support platform 19 is fixed in the holes 18 at different heights to support the height of the adjustment box 8. The upper part of the adjustment box 8 is fixedly welded with the mounting rod 21, and the upper part of the mounting rod 21 is fixedly welded with the protective plate 22 to prevent impurities from entering the side beam 1. The outer sides of both ends of the protective plate 22 are fixedly welded with the first connecting seat 23. The outer baffle 24 is installed on the pivot between the first connecting seats 23. The inner baffle 25 is slidably installed inside the outer baffle 24. The other side of the inner baffle 25 is installed on the pivot on both sides. The second connecting seat 26 is fixedly welded to the upper part of the side beam 1. When the adjustment box 8 moves up and down, it drives the protective plate 22 to move up and down. The outer baffle 24 rotates around the first connecting seat 23, so that one end of the inner baffle 25 moves along the inside of the outer baffle 24 and the other end rotates around the second connecting seat 26. When the protective plate 22 moves up and down, the outer baffle 24 and the inner baffle 25 on both sides can block the two sides of the protective plate 22.

[0023] Working principle: When in use, rotating the rotating cap 11 causes the first bevel gear 9 to drive the second bevel gear 10 to rotate, and the screw 13 rotates to move the two side moving plates 14. The push plate 15 drives the contact plate 16 to push the two side adjusting holes 6, thereby changing the distance between the two side beams 1. The distance between the two side beams 1 can be adjusted according to the width of the reserved groove. After the side beams 1 are installed, the push plates 15 on both sides are inserted into the connecting holes 7, and the support platform 19 is fixed in the different height holes 18 by the fixing screw 20 to support the height of the adjusting box 8. When the height of the adjusting box 8 changes, the mounting rod 21 drives the protective plate 22 to move up and down. The outer baffle 24 rotates around the first connecting seat 23, so that one end of the inner baffle 25 moves along the inside of the outer baffle 24, and the other end rotates around the second connecting seat 26. The outer baffle 24 and the inner baffle 25 on both sides can cover the two sides of the protective plate 22, ensuring that the upper protective plate 22 can be adjusted according to the height of the reserved groove.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bridge expansion joint for bridge construction, comprising a side beam (1) and an adjustment box (8), characterized in that: A spring (3) is fixedly connected between the two side beams (1). Several sets of connecting plates (5) are fixedly connected to the opposite side of the two side beams (1). Adjustment holes (6) are opened at both ends of the two side beams (1) facing each other. A first bevel gear (9) is rotatably connected inside the middle of the adjustment box (8). A rotating cap (11) is fixedly connected to the tail end of the first bevel gear (9) through the adjustment box (8). A second bevel gear (10) is meshed on both sides of the first bevel gear (9). A lead screw (13) is fixedly connected to the tail end of the second bevel gear (10). The lead screw (13) is rotatably connected inside the adjustment box (8). A moving plate (14) is threadedly connected to the outside of the lead screw (13). Two sets of push plates (15) are fixedly connected to the opposite side of the two moving plates (14). A contact plate (16) matching the adjustment hole (6) is fixedly connected to the other end of the push plate (15).

2. A bridge expansion joint for bridge construction according to claim 1, characterized in that: The spring (3) has a limiting sleeve (2) on both sides, and the limiting sleeve (2) is fixedly connected to the inside of the side beam (1). The spring (3) has a damping rod (4) inside, and the two ends of the damping rod (4) are fixedly connected to the side beam (1).

3. A bridge expansion joint for bridge construction according to claim 1, characterized in that: An isolation plate (12) is fixedly connected inside the adjustment box (8), and the lead screw (13) is rotatably connected inside the isolation plate (12).

4. A bridge expansion joint for bridge construction according to claim 1, characterized in that: The adjustment box (8) is fixedly connected to a limiting plate (17), which is slidably connected to the inside of the moving plate (14).

5. A bridge expansion joint for bridge construction according to claim 1, characterized in that: The side beam (1) has a connecting hole (7) that communicates with the adjustment hole (6). The connecting hole (7) has several sets of height holes (18). A support platform (19) is slidably connected inside the connecting hole (7). A fixing screw (20) that matches the height hole (18) is threaded inside the support platform (19).

6. A bridge expansion joint for bridge construction according to claim 1, characterized in that: An installation rod (21) is fixedly connected to the upper part of the adjustment box (8). A protective plate (22) is fixedly connected to the upper part of the installation rod (21). A first connecting seat (23) is fixedly connected to the outer sides of both ends of the protective plate (22). An outer baffle (24) is rotatably connected between the first connecting seats (23). An inner baffle (25) is slidably connected inside the outer baffle (24). A second connecting seat (26) is rotatably connected to both sides of the other end of the inner baffle (25). The second connecting seat (26) is fixedly connected to the upper part of the side beam (1).

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