Large-displacement toothed plate type telescopic device

Abstract

The utility model relates to the technical field of bridge expansion devices, aims to solve the problem that an existing comb plate type expansion device is poor in displacement capacity, and provides a large-displacement tooth plate type expansion device which comprises a supporting system and a rack system, and the rack system is arranged above the supporting system. The rack system comprises toothed plate box bodies installed at the ends of beam bodies on the two sides of the expansion joint respectively, the toothed plate box bodies are connected with at least two toothed plate units, one ends of the toothed plate units are rotationally connected with the toothed plate box bodies, a plurality of racks are formed on the toothed plate units, and the toothed plate units are connected with the toothed plate box bodies. The racks on the toothed plate units connected with the toothed plate box bodies on the two sides are connected in a staggered and inserted mode, and the racks on the two sides can slide relatively. The racks on the toothed plate units on the two sides of the expansion device are connected in a staggered and inserted mode, the racks on the two sides can relatively slide, each toothed plate unit can independently rotate, and therefore the expansion device can better adapt to expansion and rotation of a bridge.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge expansion device technical field, specifically, relate to a big displacement tooth plate type expansion device. BACKGROUND

[0002] With the development of bridge technology in our country, the demand of road traffic capacity and capacity is also increasing, expansion device as the key element of road traffic, the function also is constantly perfected, not only need to meet the bridge to its structure performance requirement, such as temperature and load change when the beam end expansion creep, more to the use performance of bridge is promoted, driving safety, reliability, comfort, low noise etc.

[0003] The current domestic expansion device mainly has three major types of elastomer filling type expansion device, module type expansion device and comb tooth type expansion device. Elastomer filling type expansion device has good vibration and noise reduction ability due to its material properties, but the expansion amount is small, only suitable for small span bridge and highway;Module type expansion device has strong adaptability to bridge displacement deformation, but the impact force is large, which affects the driving comfort and service life;Comb tooth expansion device is stable, the impact force is small, but the adaptability to bridge displacement deformation is weak, and the tooth gap seriously affects the driving safety of narrow wheel car. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a big displacement tooth plate type expansion device to solve the problem of poor displacement capacity of the existing comb tooth plate type expansion device.

[0005] The utility model is adopted the following technical scheme to realize:

[0006] The utility model provides a big displacement tooth plate type expansion device, including support system and rack system, the rack system is arranged in the top of support system;

[0007] The rack system includes tooth plate box body installed in the beam body end on both sides of expansion joint respectively, at least two tooth plate units are connected with tooth plate box body, one end of tooth plate unit is rotatably connected with tooth plate box body, a plurality of racks are formed on tooth plate unit, the rack on the tooth plate unit connected with tooth plate box body on both sides is staggered and is inserted, and the rack between both sides can slide relatively.

[0008] With the above structure, the racks on the tooth plate units on both sides are staggered and inserted, and the racks on both sides can slide relative to each other, thereby adapting to the expansion and deformation of the bridge; and each tooth plate unit can independently rotate, better adapting to the rotation of the bridge, and enhancing the ability of the expansion device to adapt to the displacement and deformation of the bridge, thereby solving the problem of poor displacement capacity of the existing comb tooth plate type expansion device. Moreover, compared with the independent rack structure, the number of elastic supports is reduced, and replacement is more convenient.

[0009] As a preferred technical solution:

[0010] The tooth gap between the two adjacent racks has a width smaller than the wheel width of the narrow wheel vehicle, thereby ensuring the safe passing of the narrow wheel vehicle.

[0011] With the design of the tooth plate unit, the width of the tooth gap can be reduced under the condition of adapting to the displacement and deformation of the bridge, thereby ensuring the safe passing of the narrow wheel vehicle.

[0012] As a preferred technical solution:

[0013] At least two racks are formed on each tooth plate unit, preferably three.

[0014] As a preferred technical solution:

[0015] A support is arranged between the tooth plate unit and the tooth plate box.

[0016] On the one hand, the support can reduce vibration and noise, and on the other hand, the support can adapt to the vertical displacement of the bridge.

[0017] As a preferred technical solution:

[0018] A through hole one is formed in one end of the tooth plate unit, and a shear pin is mounted in the through hole one, and the tooth plate unit is rotatably connected to the tooth plate box through the shear pin.

[0019] The tooth plate unit can rotate horizontally around the shear pin.

[0020] As a preferred technical solution:

[0021] The tooth plate unit is not limited to the mode of being rotatably connected to the tooth plate box through the shear pin installed in the through hole, and other structures capable of achieving the purpose can also be used, for example, the two are connected through a rotating shaft or a rotating connecting piece.

[0022] As a preferred technical solution:

[0023] One end of the tooth plate unit extends into the tooth plate box, and a pressing support three is installed between the tooth plate box and the top of the tooth plate unit, a bearing support is installed between the tooth plate box and the bottom of the tooth plate unit, both ends of the shear pin pass through the pressing support three and the bearing support and are connected with the tooth plate box, and the tooth plate unit is rotationally connected with the bearing support and the pressing support three.

[0024] As a preferred technical solution:

[0025] The other end of the tooth plate unit is connected with the support system, and a support is arranged between the tooth plate unit and the support system.

[0026] One end of the tooth plate unit is rotationally connected to the tooth plate box, and the other end is connected to the support system, which not only ensures that the tooth plate unit is stable under stress, but also connects the other end of the tooth plate unit to the support system, thereby avoiding the occurrence of tooth lifting and ensuring the flatness of the passing surface. When the two side beam bodies are vertically misaligned, the tooth tips of the tooth plate unit transition smoothly without the risk of tooth lifting. After lateral misalignment, the gap between the teeth is uniform, the driving is smooth and comfortable, the impact load is small, the three-dimensional deformation adaptability of the bridge is strong, and the anchoring structure of the beam end is effectively protected.

[0027] As a preferred technical solution:

[0028] The support system comprises support boxes fixedly installed at the end portions of the two side beam bodies of the expansion joint, the tooth plate box is fixedly connected with the corresponding support box, and the tooth plate box is also fixedly connected with the anchoring assembly at the end portion of the corresponding beam body.

[0029] As a preferred technical solution:

[0030] The tooth plate box and the support box are both box-shaped structures.

[0031] As a preferred technical solution:

[0032] The support system further comprises a support cross beam and a mid-beam assembly, both ends of the support cross beam are pre-pressed in the support boxes at both ends, the mid-beam assembly comprises a mid-beam, a plurality of passing cavities are formed in the mid-beam, the positions of the passing cavities correspond to the positions of the support cross beam, the support cross beam passes through the passing cavities in the mid-beam, and the other end of the tooth plate unit is connected with the mid-beam.

[0033] As a preferred technical solution:

[0034] A pressing support one is installed between the support box and the top of the support cross beam, a spherical support is installed between the support box and the bottom of the support cross beam, and both ends of the support cross beam are pre-pressed in the support boxes at both sides through the pressing support one and the spherical support.

[0035] The sliding support is installed between the middle beam and the top of the support cross beam, and the compression support two is installed between the middle beam and the bottom of the support cross beam, and the support cross beam is in sliding connection with the sliding support and the compression support two.

[0036] The other end of the tooth plate unit is provided with a through hole two, and a connecting piece is installed in the through hole two, and the connecting piece is used to connect the tooth plate unit and the middle beam.

[0037] The other end of the tooth plate unit is fixedly connected with an end support, the end support is located between the tooth plate unit and the middle beam, the connecting piece passes through the tooth plate unit and the end support in sequence, and is connected with the middle beam.

[0038] As a preferred technical solution:

[0039] The connecting piece can adopt a connecting bolt or other component with a connecting function.

[0040] As a preferred technical solution:

[0041] The compression support one, the compression support two, the pressure bearing, the compression support three, the end support, and the sliding support are all elastic supports.

[0042] The elastic support can effectively attenuate vibration and noise.

[0043] As a preferred technical solution:

[0044] The dust cover is fixedly connected on the support boxes and the middle beam assembly on both sides.

[0045] The dust cover is used to protect the sliding surface between the support cross beam and the middle beam, and is waterproof and dustproof.

[0046] As a preferred technical solution:

[0047] The dust cover is also connected and fixed with the middle beam.

[0048] As a preferred technical solution:

[0049] The dust cover adopts a telescopic structure, which can adapt to the expansion and contraction of the bridge.

[0050] As a preferred technical solution:

[0051] The lower part of the telescopic device is also provided with a waterproof rubber strip, and the two ends of the waterproof rubber strip are fixedly connected with the support boxes on both sides.

[0052] Therefore, the utility model has the advantages that:

[0053] 1、 The utility model discloses a telescopic device designs multiple tooth plate units, and multiple racks are formed to each tooth plate unit, and the racks on the tooth plate units of two sides are staggered and are inserted, and the racks between two sides can slide relatively, thereby adapting to the telescopic deformation of the bridge, and moreover, each tooth plate unit can rotate independently, can better adapt to the rotation of the bridge, and the ability of the telescopic device to adapt to the large displacement deformation of the bridge is enhanced.

[0054] 2、 The utility model discloses a telescopic device is provided with support between tooth plate unit and tooth plate box, can reduce vibration and noise on one hand, and can adapt to the vertical displacement of the bridge on the other hand.

[0055] 3、 The utility model discloses the form of tooth plate unit, compared with independent rack structure, reduces the quantity of elastic support, and is more convenient to replace.

[0056] 4、 The utility model discloses that one end of tooth plate unit is rotatably connected to tooth plate box, and the other end is connected to the middle beam, can avoid the situation of tooth lifting, guarantees the flatness of the passing surface, when the beam body of two sides is vertically misaligned, the tooth tip of tooth plate unit is smooth, and there is no risk of tooth lifting, after horizontal misalignment, the gap between teeth is even, and the car is stable and comfortable, the impact load is small, the three-dimensional deformation ability of the bridge is strong, and the beam end anchoring structure is effectively protected.

[0057] 5、 The utility model discloses that the width of the tooth gap between the rack is less than the wheel width of the narrow wheel car, guarantees that the narrow wheel car can safely pass.

[0058] 6、 The utility model discloses that all supports are elastic supports, can effectively attenuate vibration and noise.

[0059] 7、 The utility model discloses that the dust cover is provided between tooth plate unit and support crossbeam, and the dust cover can protect the sliding surface between support crossbeam and middle beam, and is waterproof and dustproof. DRAWINGS

[0060] Figure 1 The utility model discloses a large displacement tooth plate type telescopic device's structural schematic diagram.

[0061] Figure 2 For Figure 1 The sectional view of direction A-A.

[0062] Figure 3 For Figure 1 The sectional view of direction B-B.

[0063] Figure 4 For Figure 2 The local enlarged view of I.

[0064] Figure 5 For Figure 3 Local enlarged view at II in Fig.

[0065] Figure 6 Structure diagram of the tooth plate unit.

[0066] Figure 7 Plan view of the tooth plate unit.

[0067] Icon: 1-tooth plate box, 2-tooth plate unit, 3-support box, 4-middle beam assembly, 5-supporting crossbeam, 6-ball type support, 7-pressing support one, 8-pressing support two, 9-dust cover, 10-waterproof rubber strip, 11-bearing support, 12-pressing support three, 13-shear pin, 14-end support, 15-connecting bolt, 16-anchoring assembly, 17-sliding support, 18-through hole one, 19-through hole two, 20-tooth gap. DETAILED DESCRIPTION

[0068] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0069] Embodiment 1

[0070] As Figures 1-7 shown, the embodiment provides a large displacement tooth plate type telescopic device, which comprises a supporting system and a rack system, the rack system is arranged above the supporting system, and the supporting system is used for supporting the rack system.

[0071] The rack system comprises tooth plate boxes 1 fixedly installed at the end portions of beam bodies on both sides of the expansion joint respectively, a plurality of tooth plate units 2 are connected to the tooth plate boxes 1 on both sides, a plurality of racks are formed on each tooth plate unit 2, a tooth gap 20 is formed between adjacent two racks, the racks on the tooth plate units 2 connected by the tooth plate boxes 1 on both sides are staggered and inserted, and the racks on both sides can slide relative to each other. After installation, the upper surfaces of all the tooth plate units 2 are flush with the upper surfaces of the tooth plate boxes 1 on both sides. The width of the tooth gap 20 is less than the wheel width of the narrow wheel vehicle, so that the narrow wheel vehicle can pass safely.

[0072] In the embodiment, the supporting system comprises supporting boxes 3 fixedly installed at the end portions of the beams on both sides of the expansion joint, the toothed plate box 1 is fixedly connected with the corresponding supporting box 3, and the toothed plate box 1 is fixedly connected with the anchoring assembly 16 of the corresponding end portion of the beam, so that the two toothed plate boxes 1 are anchored at the end of the beam through the above structure, wherein the fixedly connected mode can be welding or the like. The toothed plate box 1 and the supporting box 3 are both box-shaped structures.

[0073] The supporting system further comprises a supporting cross beam 5, the two ends of the supporting cross beam 5 extend into the supporting boxes 3 at the two ends respectively, and the supporting box 3 and the top of the supporting cross beam 5 are provided with a compression support 7, the supporting box 3 and the bottom of the supporting cross beam 5 are provided with a spherical support 6, the two ends of the supporting cross beam 5 are pre-pressed in the supporting boxes 3 on both sides through the compression support 7 and the spherical support 6 respectively, the compression support 7 and the spherical support are used for supporting the supporting cross beam 5, and the spherical support 6 can release the rotation amount of the two ends of the supporting cross beam 5. Through the above structure, the supporting cross beam 5 can adapt to the expansion and rotation of the bridge.

[0074] The supporting system further comprises a middle beam assembly 4, the middle beam assembly 4 comprises two middle beams arranged in parallel with each other, a plurality of passing cavities are formed in the middle beams, the positions of the passing cavities correspond to the positions of the supporting cross beams 5, and each supporting cross beam 5 passes through the corresponding passing cavities on the two middle beams.

[0075] The passing cavities are provided with sliding supports 17 and compression supports 8, the sliding supports 17 are installed between the middle beams and the tops of the supporting cross beams 5, and the compression supports 8 are installed between the middle beams and the bottoms of the supporting cross beams 5. The supporting cross beams 5 are slidingly connected with the sliding supports 17 and the compression supports 8.

[0076] One end of the tooth plate unit 2 extends into the tooth plate box 1, and a through hole one 18 is formed in the end of the tooth plate unit 2, a shear pin 13 is installed in the through hole one 18, and the shear pin 13 is used to connect the tooth plate box 1 and the tooth plate unit 2. A compression support three 12 is installed between the top of the tooth plate box 1 and the tooth plate unit 2, and a pressure bearing 11 is installed between the bottom of the tooth plate box 1 and the tooth plate unit 2. The two ends of the shear pin 13 pass through the compression support three 12 and the pressure bearing 11 respectively and are connected with the tooth plate box 1. The tooth plate unit 2 can rotate laterally around the shear pin 13, and the tooth plate unit 2 is rotationally connected with the pressure bearing 11 and the compression support three 12. In this way, each tooth plate unit 2 can rotate laterally to adapt to the lateral rotation of the bridge. And because the pressure bearing 11 and the compression support three 12 are provided, the tooth plate unit 2 can also adapt to the vertical displacement of the bridge.

[0077] The other end of the tooth plate unit 2 is provided with a through hole two 19, and a connecting bolt 15 is installed in the through hole two 19. The connecting bolt 15 is used to connect the tooth plate unit 2 and the middle beam. The end of the tooth plate unit 2 is fixedly connected with an end support 14, and the end support 14 is located between the tooth plate unit 2 and the middle beam. The connecting bolt 15 passes through the tooth plate unit 2 and the end support 14 in sequence and is connected with the middle beam. The tooth plate unit 2 can rotate laterally around the connecting bolt 15. In this way, the lateral rotation and vertical displacement of the bridge can be adapted.

[0078] Because the other end of the tooth plate unit 2 is connected to the middle beam through the connecting bolt 15, when the two side beam bodies are vertically misaligned, the transition of the tooth tip can be ensured to be smooth, and there is no risk of tooth lifting.

[0079] In this embodiment, the tooth plate unit 2 connected to one side tooth plate box 1 is connected to the middle beam close to the other side tooth plate box 1, as shown in Figure 2

[0080] In this embodiment, the compression support one 7, the compression support two 8, the pressure bearing 11, the compression support three 12, the end support 14, and the sliding support 17 are all elastic supports, which can effectively attenuate vibration and noise.

[0081] In this embodiment, three racks are formed on the tooth plate unit 2, the through hole one 18 is formed at one end of the tooth plate unit 2, and the through hole two 19 is formed on the middle rack, as shown in Figure 6 and Figure 7

[0082] ​​Further, the tooth plate unit 2 and the supporting cross beam 5 are provided with dust covers 9, the dust covers 9 are fixedly connected on the supporting boxes 3 on the two sides respectively, meanwhile, the dust covers 9 are connected and fixed with the middle beam, the dust covers 9 are used for protecting the sliding surface between the supporting cross beam 5 and the middle beam, waterproof and dustproof.

[0083] The dust cover 9 adopts a telescopic structure, which can adapt to the expansion and contraction of the bridge.

[0084] Further, the lower part of the telescopic device is further provided with waterproof rubber strips 10, the two ends of the waterproof rubber strips 10 are fixedly connected with the supporting boxes 3 on the two sides respectively.

[0085] The above only is the preferred embodiment of the present application and is not used for limiting the present application, for the person skilled in the art, the present application can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A large displacement rack and pinion expansion joint, characterized in that: it comprises a support system and a rack system, the rack system is arranged above the support system; the rack system comprises rack box bodies mounted at the ends of the beam bodies on both sides of the expansion joint, at least two rack units are connected to the rack box bodies, one end of the rack units is rotatably connected to the rack box bodies, a plurality of racks are formed on the rack units, the racks on the rack units connected by the rack box bodies on both sides are staggered and inserted, and the racks on both sides can slide relative to each other.

2. The large displacement rack and pinion expansion joint according to claim 1, characterized in that: a support is arranged between the rack unit and the rack box body.

3. The large displacement rack and pinion expansion joint according to claim 2, characterized in that: a through hole one is formed at one end of the rack unit, a shear pin is mounted in the through hole one, and the rack unit is rotatably connected to the rack box body through the shear pin.

4. The large displacement rack and pinion expansion joint according to claim 3, characterized in that: one end of the rack unit extends into the rack box body, a compression support three is mounted between the rack box body and the top of the rack unit, a pressure bearing is mounted between the rack box body and the bottom of the rack unit, the two ends of the shear pin pass through the compression support three and the pressure bearing respectively and are connected to the rack box body, and the rack unit is rotatably connected to the pressure bearing and the compression support three.

5. The large displacement rack and pinion expansion joint according to claim 4, characterized in that: the other end of the rack unit is connected to the support system, and a support is arranged between the rack unit and the support system.

6. The large displacement rack and pinion expansion joint according to claim 5, characterized in that: the support system comprises support boxes fixedly mounted at the ends of the beam bodies on both sides of the expansion joint, the rack box body is fixedly connected to the corresponding support box, and the rack box body is also fixedly connected to the anchoring assembly at the end of the corresponding beam body.

7. The large displacement rack and pinion expansion joint according to claim 6, characterized in that: the support system further comprises a support cross beam and a mid beam assembly, the two ends of the support cross beam are pre-pressed in the support boxes at both ends, the mid beam assembly comprises a mid beam, a plurality of passing cavities are formed in the mid beam, the positions of the passing cavities correspond to the positions of the support cross beam, the support cross beam passes through the passing cavities in the mid beam, and the other end of the rack unit is connected to the mid beam.

8. The large displacement rack and pinion expansion joint according to claim 7, characterized in that: a compression support one is mounted between the support box and the top of the support cross beam, a spherical support is mounted between the support box and the bottom of the support cross beam, and the two ends of the support cross beam are pre-pressed in the support boxes on both sides through the compression support one and the spherical support. ​ ​ ​ ​ ​ ​ ​ ​ ​ The sliding support is installed in the through cavity, the sliding support is installed between the middle beam and the top of the support cross beam, the compression support two is installed between the middle beam and the bottom of the support cross beam, and the support cross beam is in sliding connection with the sliding support and the compression support two; The other end of the tooth plate unit is provided with a through hole two, and a connecting piece is installed in the through hole two, and the connecting piece is used to connect the tooth plate unit and the middle beam; The other end of the tooth plate unit is fixedly connected with an end support, the end support is located between the tooth plate unit and the middle beam, the connecting piece passes through the tooth plate unit and the end support in sequence, and is connected with the middle beam.

9. The large displacement tooth plate type telescopic device according to claim 8, wherein: The compression support one, the compression support two, the pressure bearing, the compression support three, the end support and the sliding support are all elastic supports.

10. The large displacement tooth plate type telescopic device according to claim 7, wherein: A dust cover is arranged between the tooth plate unit and the support cross beam, and the dust cover is fixedly connected on the support boxes and the middle beam assembly on both sides.

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