Rotary hinge type sideslip displacement expansion joint device
By designing a hinged connection structure, the vibration and bouncing problems of existing grid side-sliding displacement expansion joint devices when vehicles pass by are solved, achieving smooth adaptation of bridge expansion joints and protection of steel ribs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-04-03
AI Technical Summary
Existing grille side-sliding displacement expansion joint devices generate vibrations and steel rib bounces when vehicles pass by, affecting driving smoothness and service life.
The structure adopts a hinged connection, including two crossbeams, two shafts and multiple steel ribs. Through the design of arc-shaped grooves, limiting grooves and positioning pin holes, the steel ribs and crossbeams can rotate and slide to adapt to the expansion and contraction of the bridge and avoid collisions and bounces.
It reduces vibration and steel rib bounce when vehicles pass by, improving ride comfort and the service life of the steel ribs.
Smart Images
Figure CN224077958U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bridge construction technology and relates to a bridge expansion joint device, specifically a hinge-type side-slip displacement expansion joint device. Background Technology
[0002] Patent CN116024890A discloses a grid side-sliding displacement expansion joint device, the structure of which is as follows: Figure 1 , Figure 2 As shown, the structure mainly includes multiple steel ribs 1, a fixed crossbeam 100, a track beam 101, and a sliding crossbeam 102. The fixed crossbeam 100 and the track beam 101 are fixedly installed transversely on the top surfaces of the beam segments 300 on both sides of the expansion joint 200 and anchored to the embedded parts 400 in the concrete of the beam segments. A groove is provided at the top of the track beam 101. The sliding crossbeam 102 has a rectangular cross section and is slidably installed in the groove of the track beam 101. The multiple ribs 1 are arranged parallel between the fixed crossbeam 100 and the sliding crossbeam 101, forming a certain angle with the longitudinal direction of the bridge. Each rib 1 is rotatably connected to the fixed crossbeam 100 and the sliding crossbeam 102 at both ends by pins 4. When the width of the expansion joint 200 changes or the bridge undergoes lateral displacement, the steel ribs 1 are compressed or stretched along the longitudinal direction of the bridge, causing them to rotate around the pins 4 and drive the sliding crossbeam 102 to slide transversely within the groove of the track beam 101, thereby adapting to changes in the width of the expansion joint.
[0003] In the design of the aforementioned grid side-sliding displacement expansion joint device, considering that the length of the steel ribs will change due to thermal expansion and contraction, a certain gap is reserved between the inner wall of the sliding groove of the sliding beam 102 and the track beam 101. However, due to this gap, when a vehicle passes through the expansion joint, the instantaneous impact force of the vehicle will cause a collision between the sliding beam 102 and the track beam 101, generating a large vibration sound. Frequent collisions can also cause the anchoring structure of the expansion joint device to loosen. In addition, when vehicles pass over the bridge, it will cause the bridge to vibrate vertically. When the vibration amplitude is large, the steel ribs will bounce. If they cannot fully return to their original position after bouncing, the ends of the steel ribs will curl upwards, affecting the ride comfort. Moreover, direct impact of vehicles on the ends of the steel ribs will affect their service life. Therefore, the aforementioned grid side-sliding displacement expansion joint device needs further improvement. Summary of the Invention
[0004] The purpose of this invention is to address the above-mentioned problems by providing a hinged side-slip displacement expansion joint device, which reduces the vibration of the expansion joint device caused by vehicles passing by and prevents the steel ribs from bouncing.
[0005] The technical solution of this utility model is as follows:
[0006] A hinged side-sliding displacement expansion joint device, characterized in that it includes two crossbeams, two shafts, and multiple steel ribs;
[0007] The crossbeam includes a base plate, an outer pressure cover, and an inner pressure cover; the top surface of the base plate has an arc-shaped groove along the longitudinal direction of the crossbeam, the arc of which is less than 180°; the lower half of the inner side of the outer pressure cover is an arc-shaped surface, and the upper half of the inner side of the outer pressure cover has a limiting groove along the longitudinal direction; the inner side of the inner pressure cover is an arc-shaped surface, and the thickness of the inner pressure cover is less than the thickness of the outer pressure cover; the outer pressure cover and the inner pressure cover are respectively located on both sides of the groove on the top surface of the base plate and are connected to the base plate by bolts, the arc-shaped surfaces of the outer pressure cover and the inner pressure cover face the arc-shaped groove on the top surface of the base plate, and together with the arc-shaped groove on the top surface of the base plate, they form a shaft groove with an arc greater than 180°;
[0008] The cross-section of the shaft is an arc shape that matches the cross-section of the shaft groove on the crossbeam. A boss is provided on the top surface of the shaft along the longitudinal direction. Multiple positioning pin holes are provided at equal intervals on the top surface of the boss along the longitudinal direction of the shaft. The lower end of each positioning pin hole extends into the shaft.
[0009] Each steel rib has a connecting pin hole at both ends that runs through the steel rib vertically. Each end of each steel rib extends a limiting plug along the longitudinal direction of the steel rib, with the top surface of the limiting plug being lower than the top surface of the steel rib.
[0010] Two crossbeams are fixedly installed on the top surfaces of the beam segments on both sides of the bridge expansion joint in the transverse direction and welded to the embedded parts in the beam segments. Two axles are respectively installed in the axle grooves of the two crossbeams, with the bosses at the top of the axles protruding above the axle grooves. Multiple steel ribs are installed parallel above the bridge expansion joints at a certain angle to the longitudinal direction of the bridge. Each steel rib is supported at both ends on the bosses of the two axles. The butt pin holes at both ends of the steel ribs are aligned with the positioning pin holes on the two axles and the pins are inserted. The limiting plugs at both ends of each steel rib are inserted into the limiting grooves on the inner side of the outer pressure caps of the two crossbeams, and there is a certain gap between the top and bottom surfaces of the limiting plugs and the top and bottom surfaces of the limiting grooves, respectively.
[0011] This invention improves upon the existing grid side-sliding displacement expansion joint device, and the improved device has the following advantages:
[0012] The steel ribs and crossbeams utilize a hinged connection structure. When the bridge expansion joints or the steel ribs themselves expand or contract due to thermal expansion and contraction, the axle can rotate within the crossbeam's groove, while another axle can slide longitudinally within the groove to accommodate the longitudinal expansion and contraction of the expansion joints and steel ribs, thus preventing vibrations caused by collisions between the axle and the crossbeam. When the bridge undergoes lateral displacement, one axle can slide within the crossbeam's groove to accommodate this displacement. When the bridge undergoes vertical displacement, the limiting plug of the steel rib can move up and down within the limiting groove to accommodate longitudinal displacement. Simultaneously, the limiting groove limits the bounce of the steel rib and protects its ends from direct vehicle impacts. Furthermore, the crossbeam employs a detachable cap structure to confine the axle within the groove, facilitating axle installation and replacement. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the elevation structure of an existing side-sliding displacement expansion joint device;
[0014] Figure 2 This is a schematic diagram of the planar structure of an existing side-sliding displacement expansion joint device;
[0015] Figure 3 This is a schematic diagram of the elevation structure of this utility model;
[0016] Figure 4 This is a schematic diagram of the planar structure of this utility model;
[0017] Figure 5 yes Figure 3 The enlarged view at point A shows the hinge structure of the steel rib;
[0018] Figure 6 This is a schematic diagram of the cross-sectional structure of the beam;
[0019] Figure 7 This is a schematic diagram of the cross-sectional structure of the base plate of the beam;
[0020] Figure 8 This is a schematic diagram of the planar structure of the base plate of the crossbeam;
[0021] Figure 9 This is a schematic diagram of the cross-sectional structure of the outer pressure cap;
[0022] Figure 10 This is a schematic diagram of the planar structure of the outer pressure cap;
[0023] Figure 11 This is a schematic diagram of the cross-sectional structure of the inner pressure cap;
[0024] Figure 12 This is a schematic diagram of the planar structure of the inner pressure cap;
[0025] Figure 13 This is a schematic diagram of the cross-sectional structure of a two-axis rod;
[0026] Figure 14 This is a schematic diagram of the planar structure of the shaft;
[0027] Figure 15 This is a schematic diagram of the planar structure of the steel ribs;
[0028] Figure 16 This is a side elevation view of the steel ribs. Detailed Implementation
[0029] like Figure 3 , Figure 4 , Figure 5 As shown, this utility model includes two crossbeams 2, two shafts 3, and multiple steel ribs 1;
[0030] like Figure 6 As shown, the crossbeam 2 includes a base plate 21, an outer pressure cap 22, and an inner pressure cap 23;
[0031] like Figure 7 , Figure 8 As shown, an arc-shaped groove 211 is provided in the middle of the top surface of the base plate 21 along the longitudinal direction of the crossbeam, and the arc of the arc-shaped groove 211 is less than 180°; multiple screw holes are provided at equal intervals along the longitudinal direction on both sides of the top surface of the base plate.
[0032] like Figure 9 , Figure 10 As shown, the lower half of the inner side of the outer pressure cover 22 is an arc-shaped surface, and the upper half of the inner side of the outer pressure cover is provided with a limiting groove 221 along the longitudinal direction; multiple screw holes that penetrate the outer pressure cover vertically are provided on the outer pressure cover according to the screw hole spacing on the base plate, and the screw holes avoid the position of the limiting groove.
[0033] like Figure 11 , Figure 12 As shown, the inner surface of the inner pressure cover 23 is an arc-shaped surface, and the thickness of the inner pressure cover is less than the thickness of the outer pressure cover; the inner pressure cover has multiple screw holes that penetrate the inner pressure cover vertically according to the screw hole spacing on the base plate.
[0034] like Figure 6 As shown, the outer pressure cover 22 and the inner pressure cover 23 are respectively set on both sides of the groove on the top surface of the base plate 21 and connected to the base plate by bolts 24. The arc-shaped surfaces of the inner sides of the outer pressure cover and the inner pressure cover face the arc-shaped groove on the top surface of the base plate, and together with the arc-shaped groove on the top surface of the base plate, they form a shaft groove 25 with an arc greater than 180°.
[0035] like Figure 13 , 14 As shown, the cross-section of the shaft 3 is an arc shape that matches the cross-section of the shaft groove on the crossbeam. A boss 31 is provided on the top surface of the shaft along the longitudinal direction. Multiple positioning pin holes 32 are provided at equal intervals on the top surface of the boss 31 along the longitudinal direction of the shaft. The lower end of each positioning pin hole extends into the shaft.
[0036] like Figure 15 , 16 As shown, each steel rib 1 has a connecting pin hole 11 that runs through the steel rib from top to bottom at both ends, and a limiting plug 12 extends longitudinally from both ends of each steel rib, with the top surface of the limiting plug being lower than the top surface of the steel rib.
[0037] like Figure 3 , Figure 4 , Figure 5 As shown, two crossbeams 2 are fixedly installed on the top surface of beam segments 300 on both sides of the bridge expansion joint 200 in the transverse direction and are welded to the embedded parts 400 in the beam segments. Two shafts 3 are respectively installed in the shaft grooves 25 of the two crossbeams 2. The boss 31 at the top of the shaft 3 protrudes above the shaft groove 25. Multiple steel ribs 1 are arranged parallel above the bridge expansion joint and at a certain angle to the longitudinal direction of the bridge. The two ends of each steel rib 1 are supported on the bosses of the two shafts 3. The mating pin holes at both ends of the steel ribs are aligned with the positioning pin holes on the two shafts and the pins 4 are inserted. The limiting plugs 12 at both ends of each steel rib are inserted into the limiting grooves 221 on the inner side of the outer pressure cover of the two crossbeams, and there is a certain gap between the top and bottom surfaces of the limiting plugs 12 and the top and bottom surfaces of the limiting grooves 221, respectively.
[0038] The aforementioned expansion joint device, when a vehicle passes or thermal expansion and contraction causes changes in the width of the bridge expansion joint, the steel ribs are compressed or stretched, causing the axle to rotate within the axle groove of the crossbeam. Simultaneously, because the steel ribs form an angle with the longitudinal direction of the bridge, when the longitudinal displacement of the bridge is significant, the steel ribs will rotate horizontally due to compression or tension, causing a change in the angle between the steel ribs and the longitudinal direction of the bridge. This, in turn, causes the axle to slide longitudinally within the axle groove, thus adapting to the longitudinal displacement of the bridge. Furthermore, because there is no gap between the axle and the inner wall of the axle groove, it prevents gaps between the axle and the crossbeam. The vibration caused by the collision; when the two beam segments are laterally displaced due to vehicle vibration, the axle will slide in the axle groove to adapt to the lateral displacement of the bridge; when the two beam segments are vertically displaced due to vehicle vibration, the limiting plugs at both ends of the steel rib will move up and down in the limiting groove to adapt to the vertical displacement of the bridge. Moreover, due to the existence of the limiting groove, the steel rib can be limited to a large-scale bounce, ensuring that the steel rib can be completely reset after the vehicle passes. At the same time, it can also prevent the vehicle tires from directly impacting the ends of the steel rib, thus protecting the steel rib.
[0039] In a specific implementation of this invention, the bottom plate of one crossbeam can have its groove ends closed, allowing the shaft in the crossbeam's groove to rotate only within the groove but not slide longitudinally. The bottom plate of the other crossbeam can have its groove ends open, allowing the shaft in the crossbeam's groove to both rotate and slide longitudinally within the groove. This ensures that after longitudinal or lateral displacement of the bridge disappears, the sliding shaft can fully reset, preventing both shafts from sliding simultaneously and causing the shaft to deviate from its groove.
[0040] In a specific implementation of this utility model, the top surface of the steel rib can be flush with the top surface of the outer pressure cover of the crossbeam to ensure the smoothness of vehicle passage.
[0041] In a specific implementation of this utility model, each steel rib 1 can be configured with outwardly convex arcs at both ends, and the ends of the limiting plugs 12 at both ends of the steel ribs can also be outwardly convex arcs, making the steel ribs rotate more smoothly when horizontally.
[0042] When installing this invention on a bridge, firstly, the base plates 21 of the two crossbeams 2 are welded and fixed to the embedded parts 400 in the pre-reserved grooves at the ends of the beam segments 300 on both sides of the expansion joint 200. Concrete is then poured into the pre-reserved grooves. Next, the two shafts 3 are placed in the grooves of the two base plates respectively. Then, the outer pressure caps 22 and inner pressure caps 23 are fixed to the base plates 21 with bolts 24, confining the shafts 3 within the shaft grooves of the crossbeams. Finally, the steel ribs 1 are placed one by one onto the shafts of the two crossbeams, and the limiting plugs at both ends of the steel ribs are inserted into the limiting grooves of the outer pressure caps of the two crossbeams. The angle of the steel ribs is adjusted, and pins 4 are inserted into the mating pin holes at both ends of the steel ribs and the positioning pin holes on the shafts, thus completing the installation of the expansion joint device. For later maintenance, the outer pressure caps on the crossbeams can be removed to replace the steel ribs, and the outer and inner pressure caps on the crossbeams can be removed to replace the shafts.
Claims
1. A hinged lateral sliding displacement expansion joint device, characterized in that: It includes two crossbeams, two shafts, and multiple steel ribs; The crossbeam includes a base plate, an outer pressure cover, and an inner pressure cover; the top surface of the base plate has an arc-shaped groove along the longitudinal direction of the crossbeam, the arc of which is less than 180°; the lower half of the inner side of the outer pressure cover is an arc-shaped surface, and the upper half of the inner side of the outer pressure cover has a limiting groove along the longitudinal direction; the inner side of the inner pressure cover is an arc-shaped surface, and the thickness of the inner pressure cover is less than the thickness of the outer pressure cover; the outer pressure cover and the inner pressure cover are respectively located on both sides of the groove on the top surface of the base plate and are connected to the base plate by bolts, the arc-shaped surfaces of the outer pressure cover and the inner pressure cover face the arc-shaped groove on the top surface of the base plate, and together with the arc-shaped groove on the top surface of the base plate, they form a shaft groove with an arc greater than 180°; The cross-section of the shaft is an arc shape that matches the cross-section of the shaft groove on the crossbeam. A boss is provided on the top surface of the shaft along the longitudinal direction. Multiple positioning pin holes are provided at equal intervals on the top surface of the boss along the longitudinal direction of the shaft. The lower end of each positioning pin hole extends into the shaft. Each steel rib has a connecting pin hole at both ends that runs through the steel rib vertically. Each end of each steel rib extends a limiting plug along the longitudinal direction of the steel rib, with the top surface of the limiting plug being lower than the top surface of the steel rib. Two crossbeams are fixedly installed on the top surfaces of the beam segments on both sides of the bridge expansion joint in the transverse direction and welded to the embedded parts in the beam segments. Two axles are respectively installed in the axle grooves of the two crossbeams, with the bosses at the top of the axles protruding above the axle grooves. Multiple steel ribs are installed parallel above the bridge expansion joints at a certain angle to the longitudinal direction of the bridge. Each steel rib is supported at both ends on the bosses of the two axles. The butt pin holes at both ends of the steel ribs are aligned with the positioning pin holes on the two axles and the pins are inserted. The limiting plugs at both ends of each steel rib are inserted into the limiting grooves on the inner side of the outer pressure caps of the two crossbeams, and there is a certain gap between the top and bottom surfaces of the limiting plugs and the top and bottom surfaces of the limiting grooves, respectively.
2. The hinge-type side-sliding displacement expansion joint device according to claim 1, characterized in that: Of the two crossbeams, one crossbeam has a closed-end structure at both ends of the groove in its base plate, allowing the shaft in the groove to rotate but not slide longitudinally; the other crossbeam has an open-end structure at both ends of the groove in its base plate, allowing the shaft in the groove to both rotate and slide longitudinally.
3. The hinge-type side-sliding displacement expansion joint device according to claim 1, characterized in that: The top surface of the steel rib is flush with the top surface of the outer pressure cover of the crossbeam.
4. The hinge-type side-sliding displacement expansion joint device according to claim 1, characterized in that: Each steel rib has outward-convex arcs at both ends, and the ends of the limiting plugs at both ends of the steel ribs are also outward-convex arcs.