Damping sideslip displacement type expansion joint device

Abstract

The utility model relates to a damping sideslip displacement type expansion joint device which comprises a first cross beam, a second cross beam and a plurality of steel ribs, the two cross beams are respectively fixed on two beam end top surfaces on two sides of an expansion joint in the transverse bridge direction, and the plurality of steel ribs are erected above the two cross beams in parallel at a certain included angle with the longitudinal direction of a bridge. The top faces of the two cross beams are each provided with an arc-shaped shaft groove in the longitudinal direction of the corresponding cross beam, shaft rods are arranged in the shaft grooves, the shaft rod in the shaft groove of the first cross beam can axially rotate but cannot longitudinally slide, and the shaft rod in the shaft groove of the second cross beam can axially rotate and longitudinally slide. And two ends of each steel rib are respectively supported on the two shaft rods and are rotationally connected with the two shaft rods through pin shafts. According to the utility model, the length change of the steel rib caused by temperature change can be adapted through the rotation of the shaft lever, the shaft lever and the cross beam are not collided during driving, and the vibration noise generated when a vehicle passes through the expansion joint can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction, and relates to a bridge expansion joint device, in particular to a side-sliding displacement type expansion joint device with shock absorption function. Background Art

[0002] The commonly used bridge expansion joint devices mainly include modular expansion joints and comb-tooth expansion joints. The modular expansion joint is an integral structure, including two displacement boxes and multiple cross-bridge beams. A rubber sealing strip is connected between the beams. Once a certain beam is damaged, the whole width needs to be replaced, with a high cost, and traffic needs to be interrupted temporarily during the replacement construction process. The comb-tooth plate expansion joint includes two comb-tooth plates respectively anchored at the two beam ends, and the teeth of the two comb-tooth plates are interlaced with each other. Since the comb-tooth plate is a cantilever structure, it is easy to have the situation of tooth breakage and upward warping, which affects the smoothness of vehicle passing and poses a safety hazard to driving.

[0003] In view of the above problems existing in the existing commonly used expansion joint devices, a grid side-sliding displacement type expansion joint device is proposed in Patent CN116024890A, and its structure is as Figure 1 、 Figure 2 shown, mainly including a fixed cross beam 11, a sliding cross beam 12, a track beam 13 and multiple steel ribs 3. The fixed cross beam 11 and the track beam 13 are respectively fixedly arranged transversely on the top surface of the end concrete of the beam segments 101 on both sides of the expansion joint 100 and welded to the anchor parts 102 embedded in the concrete. A chute is arranged on the top of the track beam 3. The sliding cross beam 2 has a rectangular cross section and is slidably arranged in the chute of the track beam 13. Multiple ribs 3 are arranged in parallel between the fixed cross beam 11 and the sliding cross beam 12 and form a certain angle with the longitudinal direction of the bridge. Both ends of each rib 3 are respectively rotatably connected to the fixed cross beam 11 and the sliding cross beam 12 through a pin shaft 7. When the width of the expansion joint 100 changes or the bridge undergoes lateral displacement, the steel ribs 3 are compressed or stretched along the longitudinal direction of the bridge. The steel ribs will rotate around the pin shaft 7 connected to the fixed cross beam and drive the sliding cross beam 12 to slide transversely in the chute of the track beam 13, so as to adapt to the change of the expansion joint width. The steel ribs are arranged across the expansion joint, which can improve the smoothness when the vehicle passes; if a certain steel rib is damaged, it can be replaced separately, which is convenient for maintenance.

[0004] When designing the above grid side-slip displacement expansion joint device, it is considered that the length of the steel rib will change due to thermal expansion and contraction. If the steel rib does not have a certain length expansion space, it may be bent and deformed due to extrusion. Therefore, a certain gap is reserved between the inner walls of the chute of the sliding cross beam 12 and the track beam 13. When the length of the steel rib 3 changes, it will push and pull the sliding cross beam 12 to move longitudinally along the bridge in the shaft groove. However, it is found in use that due to the existence of this gap, when the vehicle passes through the expansion joint, the instantaneous impact force of the vehicle will cause a violent collision between the sliding cross beam 12 and the track beam 13, generating a large vibration sound and affecting the driving comfort. In addition, frequent collisions will also cause the expansion joint device to loosen and affect its service life. Summary of the Invention

[0005] The object of the present utility model is to further improve the structure of the existing grid side-slip displacement expansion joint device in view of the above problems, and provide a shock-absorbing side-slip displacement expansion joint device to minimize the vibration generated during driving.

[0006] The technical solution of the present utility model is as follows:

[0007] A shock-absorbing side-slip displacement expansion joint device includes a first cross beam, a second cross beam and a plurality of steel ribs. The two cross beams are respectively supported transversely on the top surfaces of the two beam ends on both sides of the expansion joint and are welded and fixed to the anchor parts embedded in the beam end concrete. The plurality of steel ribs are arranged parallel to each other above the two cross beams at a certain angle to the longitudinal direction of the bridge. It is characterized in that: an arc-shaped shaft groove is respectively arranged along the longitudinal direction of the cross beam on the top surfaces of the two cross beams, and the radian of the cross section of the shaft groove is greater than 180°. A first shaft rod is arranged in the shaft groove of the first cross beam, and a second shaft rod is arranged in the shaft groove of the second cross beam; the lower half of each shaft rod is a hinged part, and the cross section of the hinged part is an arc-shaped section that matches the size of the shaft grooves on the two cross beams. The upper half of each shaft rod is a support part, and the cross section of the support part is rectangular, and its width is smaller than the width of the top of the hinged part. A plurality of pin holes penetrating from the top surface of the support part into the hinged part are respectively arranged at equal intervals on the two shaft rods; the hinged parts of the two shaft rods are respectively located in the shaft grooves of the two cross beams, and the support parts protrude above the shaft grooves. The length of the shaft groove of the first cross beam is equal to the length of the first shaft rod, and the first shaft rod can rotate axially in the shaft groove of the first cross beam. The length of the shaft groove of the second cross beam is greater than the length of the second shaft rod, and the second shaft rod can rotate axially and slide longitudinally in the shaft groove of the second cross beam; both ends of each steel rib are respectively supported on the support parts of the two shaft rods, and a pin shaft is respectively penetrated through both ends of each steel rib, and the lower ends of the two pin shafts are respectively inserted into the pin holes on the two shaft rods.

[0008] The utility model changes the rectangular sliding crossbeam of the existing grille side-sliding displacement type expansion joint device into a shaft rod with an arc-shaped cross-section, and also sets corresponding shaft grooves and corresponding shaft rods in the fixed crossbeam. When the length of the rib changes due to thermal expansion and contraction, the shaft rod can rotate axially to adapt to this change. There is no gap between the inner walls of the shaft grooves of the shaft rod crossbeam, which can prevent collisions between the shaft rod and the crossbeam caused by vehicle impact, thereby reducing noise, improving driving comfort, and preventing the loosening of the expansion joint device due to collisions. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a front elevation structural schematic diagram of the existing side-sliding displacement type expansion joint device;

[0010] Figure 2 is a plan view structural schematic diagram of the existing side-sliding displacement type expansion joint device;

[0011] Figure 3 is a front elevation structural schematic diagram of the utility model;

[0012] Figure 4 is a plan view structural schematic diagram of the utility model;

[0013] Figure 5 is a cross-sectional structural schematic diagram of the first crossbeam and the second crossbeam;

[0014] Figure 6 is a cross-sectional structural schematic diagram of the shaft rod;

[0015] Figure 7 is a plan view structural schematic diagram of the shaft rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] As Figure 3 , Figure 4 shown, the utility model includes a first crossbeam 1, a second crossbeam 2 and a plurality of steel ribs 3. The first crossbeam 1 and the second crossbeam 2 are respectively supported transversely on the top surfaces of the concrete at the beam ends of two beam segments 101 on both sides of the expansion joint 100 and are fixedly welded to the anchor fittings 102 embedded in the beam end concrete. The plurality of steel ribs 3 are arranged parallel to each other above the first crossbeam 1 and the second crossbeam 2 at a certain angle to the longitudinal direction of the bridge; there is a certain gap between the two ends of each steel rib and the side walls of the two beam ends, and the top surface of each steel rib is flush with the beam surface; a shaft groove is provided along the longitudinal direction of the crossbeam on the top surfaces of both the first crossbeam 1 and the second crossbeam 2. Among them, a first shaft rod 4 is arranged in the shaft groove of the first crossbeam 1, and a second shaft rod 5 is arranged in the shaft groove of the second crossbeam 2;

[0017] As Figure 5 shown, shaft grooves 6 are provided on both the first crossbeam 1 and the second crossbeam 2. The cross-section of the shaft groove 6 is arc-shaped, and the radian is greater than 180°;

[0018] As Figure 6 ,Figure 7 As shown, the lower half of the first shaft rod 4 is a hinge part 41, and the upper half is a support part 42; the lower half of the second shaft rod 5 is a hinge part 51, and the upper half is a support part 52; the cross-sections of the hinge parts 41 and 51 of the shaft rods are arc-shaped sections that match the sizes of the arc-shaped shaft grooves 6 on the two cross beams, and the cross-sections of the support parts 42 and 52 are rectangular, and their widths are smaller than the width of the top of the hinge part; a plurality of pin holes 43 and 53 that penetrate from the top surface of the support part into the hinge part are equidistantly arranged on the first shaft rod 4 and the second shaft rod 5 respectively;

[0019] As Figure 3 , Figure 4 shown in, the hinge parts of the first shaft rod 4 and the second shaft rod 5 are respectively located in the shaft grooves of the first cross beam 1 and the second cross beam 2, and the support parts of the two shaft rods protrude above the shaft grooves, wherein the length of the shaft groove of the first cross beam 1 is equal to the length of the first shaft rod 4, so that the first shaft rod 4 can rotate axially in the shaft groove of the first cross beam 1 but cannot slide longitudinally; the length of the shaft groove of the second cross beam 2 is greater than the length of the second shaft rod 5, and the second shaft rod 5 can rotate axially and slide longitudinally in the shaft groove of the second cross beam 2; both ends of each steel rib 3 are respectively supported on the support parts of the first shaft rod 4 and the second shaft rod 5, and a pin shaft 7 is respectively passed through both ends of each steel rib, and the lower ends of the two pin shafts 7 are respectively inserted into the pin holes on the two shaft rods.

[0020] In the above structure, the hinge parts of the first shaft rod 4 and the second shaft rod 5 are respectively limited in the shaft grooves on the first cross beam 1 and the second cross beam 2, and the hinge part is in close contact with the inner wall of the shaft groove. When the length of the steel rib 3 changes due to thermal expansion and contraction, it can drive the two shaft rods to rotate axially in the shaft groove, so as to adapt to the change in the length of the steel rib;

[0021] When the width of the bridge expansion joint 100 changes, it will squeeze or pull the steel rib 3 longitudinally along the bridge, causing the steel rib to rotate around the pin shaft on the first shaft rod, changing the angle with the longitudinal direction of the bridge, and at the same time driving the second shaft rod 5 to slide transversely in the shaft groove of the second cross beam 2, so as to adapt to the change in the width of the expansion joint;

[0022] When the two beam segments have a transverse relative displacement due to vehicle vibration, it will also cause the second shaft rod 5 to slide transversely in the shaft groove of the second cross beam 2, so as to adapt to the transverse displacement of the bridge;

[0023] When the beam segment vibrates up and down due to vehicle load, it can cause the two ends of the steel rib 3 to vibrate up and down, and at the same time drive the pin shaft 7 to slide up and down in the pin hole, so as to adapt to the vertical displacement of the bridge;

[0024] When the vehicle passes through the expansion joint, it will generate an impact force in the longitudinal direction of the bridge on the steel rib 3, and the steel rib will transmit the impact force to the shaft rod, which can push the two shaft rods to rotate axially. Moreover, since there is no gap between the shaft rod and the inner wall of the shaft groove, there will be no collision between the shaft rod and the inner wall of the shaft groove, and the vibration noise caused by the collision can be avoided.

[0025] When the utility model is specifically implemented, in order to ensure that the first shaft rod can only rotate axially in the axial groove of the first cross beam and cannot slide longitudinally, plug plates 8 can be respectively arranged at both ends of the axial groove of the first cross beam.

[0026] When the utility model is specifically implemented, in order to reduce the friction force when the shaft rod rotates or slides in the axial groove, a layer of polytetrafluoroethylene sliding plates can be respectively arranged on the inner walls of the axial grooves of the first cross beam and the second cross beam.

Claims

1. A shock-absorbing side-slip displacement type expansion joint device, comprising a first cross beam, a second cross beam and a plurality of steel ribs. The two cross beams are respectively supported transversely on the top surfaces of two beam ends on both sides of the expansion joint and are fixedly welded to the anchor parts embedded in the beam end concrete. The plurality of steel ribs are arranged parallel to each other above the two cross beams at a certain angle with the longitudinal direction of the bridge, and it is characterized in that: An arc-shaped shaft groove is provided along the longitudinal direction of the crossbeam on the top surfaces of the two crossbeams respectively. The radian of the cross-section of the shaft groove is greater than 180°. A first shaft rod is arranged in the shaft groove of the first crossbeam, and a second shaft rod is arranged in the shaft groove of the second crossbeam. The lower half of each shaft rod is a hinge part, and the cross-section of the hinge part is an arc-shaped cross-section that matches the size of the shaft grooves on the two crossbeams. The upper half of each shaft rod is a support part, and the cross-section of the support part is rectangular, and its width is less than the width of the top of the hinge part. A plurality of pin holes are equidistantly arranged on the two shaft rods and penetrate from the top surface of the support part into the hinge part. The hinge parts of the two shaft rods are respectively located in the shaft grooves of the two crossbeams, and the support parts protrude above the shaft grooves. The length of the shaft groove of the first crossbeam is equal to the length of the first shaft rod, and the first shaft rod can rotate axially in the shaft groove of the first crossbeam. The length of the shaft groove of the second crossbeam is greater than the length of the second shaft rod, and the second shaft rod can rotate axially and slide longitudinally in the shaft groove of the second crossbeam. The two ends of each steel rib are respectively supported on the support parts of the two shaft rods, and a pin shaft is respectively penetrated through the two ends of each steel rib. The lower ends of the two pin shafts are respectively inserted into the pin holes on the two shaft rods.

2. The shock-absorbing side-slip displacement type expansion joint device according to claim 1, characterized in that: Plug plates are respectively arranged at both ends of the shaft groove of the first crossbeam.

3. The shock-absorbing side-slip displacement type expansion joint device according to claim 1, characterized in that: A layer of polytetrafluoroethylene sliding plates is respectively arranged on the inner walls of the shaft grooves of the first crossbeam and the second crossbeam.

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