Elastic supporting structure for multidirectional displacement bridge expansion joint
By using a multi-directional displacement bridge expansion joint elastic support structure, and employing a combination design of comb plates, ball bearings, and expansion grooves, the problem of insufficient load-bearing capacity of bridge expansion joints is solved, achieving multi-dimensional displacement guidance and load distribution, thereby improving the safety and comfort of the bridge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MIANYANG CHUANJIAO HIGHWAY PLANNING SURVEY & DESIGN CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-05-19
AI Technical Summary
Existing bridge expansion joint devices are not ideal in terms of load-bearing capacity, which affects vehicle driving safety and is not convenient for effectively supporting bridge expansion joints.
The bridge expansion joint adopts a multi-directional displacement elastic support structure, which utilizes a combination design of comb plates, ball bearings and expansion grooves, combined with rubber blocks and buffer blocks. Through the interlocking of ball bearings and expansion grooves and the cooperation of cover plates and sliding rods, multi-dimensional displacement guidance and load distribution are achieved.
It improves the load-bearing capacity of bridge expansion joints, prevents misalignment, ensures the normal use of expansion joints, and enhances the safety and comfort of bridges.
Smart Images
Figure CN224259189U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge expansion joint technology, and in particular to an elastic support structure for multi-directional displacement bridge expansion joints. Background Technology
[0002] Bridge expansion joints are joints installed to accommodate bridge deck deformation, typically between the ends of two beams, between a beam end and an abutment, or at hinged joints. These joints must allow free expansion and contraction in both directions parallel and perpendicular to the bridge axis, be robust and reliable, and provide a smooth ride for vehicles without bumps or noise. They must prevent rainwater and debris from seeping in and causing blockages. Installation, inspection, maintenance, and cleaning should be simple and convenient. At expansion joint locations, the railings and bridge deck pavement must be disconnected.
[0003] As shown in the reference case "A Double-Fold Multi-Directional Expansion Joint" (Announcement No. CN212052298U), the cement layer, the fixed plate, the side beam plate, the middle beam plate and the waterproof block work together to fill the gap between the middle beam plate and the fixed plate, and at the same time fill the gap between the side beam plate and the middle beam plate, thus waterproofing the expansion joint and preventing excessive water accumulation that could cause seepage and corrosion. Meanwhile, the waterproof block connects the gap between the side beam plate and the middle beam plate, ensuring that the gap remains uniform when the middle beam plate is misaligned.
[0004] According to the above reference materials, when the beams on both sides of the expansion joint are vertically misaligned in the above device, one side of the beam drives the middle beam plate downward through the second bolt. At this time, the pressure plate squeezes the first elastic plate, the middle beam plate squeezes the second elastic plate, and the second bolt and the fixing plate squeeze the third elastic plate together. At this time, the middle beam plate is driven to tilt to maintain the connection with the beam. However, when this device supports the expansion joint, the load-bearing capacity of the bridge is not ideal. The bridge expansion joint can easily affect the driving safety of vehicles and is inconvenient to effectively support the bridge expansion joint, thus reducing the effectiveness of the device. Utility Model Content
[0005] Therefore, it is necessary to provide a multi-directional displacement elastic support structure for bridge expansion joints to address the problem of inconvenience in effectively supporting bridge expansion joints.
[0006] The system includes two bases, with a base mounted on the top of each base; a support mechanism, capable of providing elastic support for bridge expansion joints and suitable for complex loads, is located on the top of the bases; wherein, the support mechanism includes a comb plate fixedly connected to the top of the bases, with one side of the two comb plates intersecting each other, one side of the comb plate having a tooth block rotatably connected to several evenly arranged ball bearings, and one end of the comb plate having a tooth block with several evenly arranged expansion grooves, the ball bearings being slidably connected to the inner wall of the expansion grooves, and an expansion assembly being provided on the top of the bases.
[0007] In one embodiment, the support mechanism further includes a plurality of rubber blocks evenly arranged and installed on the inner wall of the telescopic groove, and the outer wall of the ball is in contact with the rubber blocks.
[0008] In one embodiment, a plurality of buffer blocks are installed between the two comb plates and are evenly arranged.
[0009] In one embodiment, the buffer blocks are embedded between the tooth blocks on one side of the comb plates.
[0010] In one embodiment, the telescopic assembly includes a cover plate installed at the top ends of the two comb plates. Two sliding rods are installed at the top end of the cover plate. One end of the sliding rod penetrates through the other comb plate and is threadedly connected to a nut. A compression spring is provided at the top end of the nut.
[0011] In one embodiment, metal plates are installed at the top ends of the two comb plates.
[0012] In one embodiment, the two metal plates are respectively installed on both sides of the bottom of the cover plate.
[0013] In one embodiment, a plurality of fixing bolts are installed at the top end of the metal plate. One end of the fixing bolt sequentially penetrates through the metal plate and the comb plate and is threadedly connected to the support plate.
[0014] Beneficial effects
[0015] 1. For the above multi-directional displacement bridge expansion joint elastic support structure, the base drives the comb plates to be installed in the base. One side of the two comb plates is connected in an interlaced manner. The ball is mutually engaged with the telescopic groove, which can limit the displacement direction of the comb plates. The telescopic groove is in the shape of "Feng", which can guide the longitudinal expansion, lateral displacement, and vertical direction change of the comb plates, preventing the comb plates from being misaligned. The rubber blocks can absorb the load received by the balls. The buffer plate between the two comb plates can absorb and disperse the load generated by the expansion joint, enabling the comb plates to expand and contract along the preset path, avoiding tooth misalignment, while dispersing the torsional load, improving the support effect of the bridge expansion joint elastic support structure, and reducing the load received by the expansion joint;
[0016] 2. The cover plate and the two metal plates are both installed on the two comb plates. The metal plates connect the comb plates and the support plate together through the fixing bolts. The cover plate is installed at the top of the two metal plates and above the two comb plates through the sliding rods. The sliding rods cooperate with the nuts and the compression springs to constrain the displacement direction of the expansion joint, preventing the expansion joint from getting stuck, and improving the use effect of the bridge expansion joint elastic support structure. Description of the drawings
[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the external structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the support mechanism structure of this utility model;
[0020] Figure 3 This is a partial structural diagram of the support mechanism of this utility model;
[0021] Figure 4 This is a schematic diagram of the telescopic component structure of this utility model;
[0022] Figure 5 This is a partial structural diagram of the telescopic component of this utility model.
[0023] Figure label:
[0024] 100. Base; 200. Base plate; 300. Support mechanism; 310. Comb plate; 320. Ball bearing; 330. Telescopic groove; 340. Rubber block; 350. Buffer block; 360. Telescopic assembly; 361. Cover plate; 362. Sliding rod; 363. Nut; 364. Compression spring; 365. Metal plate; 366. Fixing bolt; 367. Support plate. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0026] The following is combined Figures 1-5 This invention describes a multi-directional displacement bridge expansion joint elastic support structure.
[0027] In one embodiment, a multi-directional displacement bridge expansion joint elastic support structure includes two bases 100, with a base 200 mounted on the top of each base 100; a support mechanism 300, capable of providing elastic support for the bridge expansion joint and suitable for complex loads, is disposed on the top of the base 200; wherein, the support mechanism 300 includes a comb plate 310 fixedly connected to the top of the base 200, with one side of the two comb plates 310 intersecting each other, a tooth block on one side of one comb plate 310 being rotatably connected to a number of evenly arranged ball bearings 320, and a tooth block at one end of the other comb plate 310 having a number of evenly arranged expansion grooves 330, with the ball bearings 320 slidably connected to the inner wall of the expansion grooves 330, and an expansion component 360 disposed on the top of the base 200.
[0028] It should be noted that the expansion joint elastic support structure is composed of
[0029] Rubber waterstop: Lay on expansion joints for waterproofing and sealing. The left and right sides of the rubber waterstop are fixed to the components on the left and right sides of the expansion joint, respectively.
[0030] Hinge box: A component fixed to the right side of the expansion joint, used to secure the right side of the rubber waterstop. The hinge box is located on the right side of the rubber waterstop.
[0031] Cover plate 361 lower pad: Fixed to the component on the left side of the expansion joint, used to fix the left side of the rubber waterstop. Cover plate 361 lower pad is set on the left side of the rubber waterstop.
[0032] Cover plate 361: Located above the rubber waterstop, it is rotatably mounted on the hinge box via a hinge shaft. The left side of cover plate 361 is set on the lower pad of cover plate 361. Cover plate 361 is provided with waist holes, and bolts are used to fix the lower pad of cover plate 361 and the rubber waterstop to the component on the left side of the expansion joint through the waist holes;
[0033] The support mechanism 300 uses two interlocking comb plates 310. The two comb plates 310 are connected by ball bearings 320 and expansion grooves 330 to guide the expansion joint, improve the load-bearing capacity of the expansion joint, and release multi-dimensional displacement stress. The expansion component 360, through the cooperation of cover plate 361, sliding rod 362, compression spring 364, and nut 363, can control the displacement direction of the expansion joint, ensuring that the expansion joint deforms in an orderly manner during thermal expansion and contraction, settlement, or earthquakes. The support mechanism 300 and the expansion component 360 work together to optimize the load effect of the expansion joint without affecting its normal use.
[0034] like Figure 2 and Figure 3As shown, the support mechanism 300 also includes several rubber blocks 340 that are evenly arranged and installed on the inner wall of the telescopic groove 330. The outer wall of the ball 320 is in contact with the rubber blocks 340. Several buffer blocks 350 that are evenly arranged are installed between the two comb plates 310. The buffer blocks 350 are embedded between the teeth on one side of the comb plate 310.
[0035] In this embodiment, the comb plates 310 on the two bases 200 are staggered on one side, and the ball bearings 320 on one side of one comb plate 310 are embedded in the expansion groove 330 on the other side of the comb plate 310. This can guide the displacement direction of the two comb plates 310 and prevent the expansion joint from being misaligned. The rubber block 340 in the expansion groove 330 can absorb and buffer the load. The rubber block 340 between the two comb plates 310 protects the expansion joint by compression and absorbs and disperses the load, which can improve the multi-directional displacement effect of the elastic support structure of the expansion joint and improve the load transfer effect of the expansion joint.
[0036] like Figure 4 and Figure 5 As shown, the telescopic assembly 360 includes a cover plate 361 installed on the top of two comb plates 310. Two sliding rods 362 are installed on the top of the cover plate 361. One end of the sliding rod 362 passes through the other comb plate 310 and is threadedly connected to a nut 363. A compression spring 364 is provided on the top of the nut 363. Metal plates 365 are installed on the top of the two comb plates 310. The two metal plates 365 are respectively installed on both sides of the bottom of the cover plate 361. Several evenly arranged fixing bolts 366 are installed on the top of the metal plates 365. One end of the fixing bolts 366 passes through the metal plate 365 and the comb plate 310 in sequence and is threadedly connected to a support plate 367.
[0037] In this embodiment, the cover plate 361 is mounted on two metal plates 365, which are respectively mounted on two comb plates 310. The metal plates 365 are fixed by rotating the fixing bolts 366 and threadedly connecting them to the support plate 367. The cover plate 361 is installed on another comb plate 310 by the cooperation of the sliding rod 362 and the nut 363. The sliding rod 362 and the compression spring 364 can constrain the displacement direction, ensuring that the expansion joint cover plate 361 slides in the center, which can improve the load transfer effect of the expansion joint support structure.
[0038] Working principle: The base 200 is installed inside the base 100 by a steel bar on one side of the bottom. The comb plates 310 on the top of the two bases 200 are installed alternately on one side. The ball 320 on one side of the comb plate 310 is embedded in the expansion groove 330 on the other side of the comb plate 310 to guide the displacement direction of the expansion joint and prevent the expansion joint from falling off and getting stuck. The rubber block 340 in the expansion groove 330 cooperates with the ball 320 to buffer the load on the expansion joint. When the two comb plates 310 expand and contract, they squeeze the buffer block 350. The metal plate 365 is installed on the comb plate 310 by fixing bolts 366. The cover plate 361 passes through the other comb plate 310 through the sliding rod 362 and is threadedly connected to the nut 363. The sliding rod 362 cooperates with the cover plate 361 through the compression spring 364 to constrain the displacement direction of the expansion joint and ensure that the expansion joint cover plate 361 slides in the center to prevent lateral jamming.
[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this 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 of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. An elastic support structure for multi-directional displacement bridge expansion joints, characterized in that, include: Two bases (100), with a base (200) mounted on the top of each of the two bases (100). The support mechanism (300) can provide elastic support for bridge expansion joints and is suitable for complex loads. The support mechanism (300) is located at the top of the base (200). The support mechanism (300) includes a comb plate (310) fixedly connected to the top of the base (200). The two comb plates (310) are staggered on one side. One comb plate (310) has a tooth block on one side rotatably connected with a number of evenly arranged balls (320). The tooth block at one end of the other comb plate (310) has a number of evenly arranged telescopic grooves (330). The balls (320) are slidably connected to the inner wall of the telescopic grooves (330). The top of the base (200) is provided with a telescopic component (360).
2. The elastic support structure for multi-directional displacement bridge expansion joints according to claim 1, characterized in that, The support mechanism (300) also includes several rubber blocks (340) evenly arranged and installed on the inner wall of the telescopic groove (330), and the outer wall of the ball (320) is in contact with the rubber blocks (340).
3. The elastic support structure for multi-directional displacement bridge expansion joints according to claim 1, characterized in that, A number of evenly arranged buffer blocks (350) are installed between the two comb plates (310).
4. The elastic support structure for multi-directional displacement bridge expansion joints according to claim 3, characterized in that, The buffer block (350) is embedded between the teeth on one side of the comb plate (310).
5. The elastic support structure for multi-directional displacement bridge expansion joints according to claim 1, characterized in that, The telescopic assembly (360) includes a cover plate (361) mounted on the top of the two comb plates (310). Two sliding rods (362) are mounted on the top of the cover plate (361). One end of each sliding rod (362) passes through the other comb plate (310) and is threadedly connected to a nut (363). A compression spring (364) is provided on the top of the nut (363).
6. The elastic support structure for multi-directional displacement bridge expansion joints according to claim 1, characterized in that, Metal plates (365) are mounted on the top of the two comb plates (310).
7. The elastic support structure for multi-directional displacement bridge expansion joints according to claim 6, characterized in that, The two metal plates (365) are respectively installed on both sides of the bottom of the cover plate (361).
8. The elastic support structure for multi-directional displacement bridge expansion joints according to claim 6, characterized in that, The top of the metal plate (365) is fitted with several evenly arranged fixing bolts (366), one end of which passes through the metal plate (365) and the comb plate (310) in sequence and is threadedly connected to the support plate (367).