Bridge expansion joint

Abstract

The utility model relates to the technical field of expansion joints, and provides a bridge expansion joint, which is used for being mounted between a first bridge body and a second bridge body and comprises a first seat body and a second seat body, the middle seat is positioned between the first seat body and the second seat body; the first side rotating shaft and the second side rotating shaft are respectively arranged on the first seat body and the second seat body; the connecting piece is connected with the first side rotating shaft, the second side rotating shaft and the middle seat; one end of the first elastic piece is arranged on the middle base and acts on the first side rotating shaft and the second side rotating shaft through the connecting piece to provide resistance for relative movement of the first side rotating shaft and the second side rotating shaft. By means of the technical scheme, the problems that in the prior art, a simple mechanical structure such as a sliding type structure, a rolling type structure or a shearing type structure is mostly adopted in the design of a traditional bridge expansion joint, but the expansion joint of the type has certain limitation in practical application, such as large friction resistance, serious abrasion, frequent maintenance and replacement, poor adaptability and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, and specifically to a bridge expansion joint. Background Art

[0002] In the field of modern bridge engineering, due to the increase in bridge span, the complexity and diversity of traffic loads, and the influence of natural environmental factors (such as temperature changes, wind loads, earthquakes, etc.), bridge structures will inevitably experience different degrees of thermal expansion and contraction, flexural deformation, etc. during long-term service. In order to solve this problem, bridge expansion joints are widely used as an important part of bridge structures. They allow adjacent beam sections to expand and contract relatively independently when affected by external factors, and can also effectively absorb and transmit various loads, reduce stress concentration in bridge structures, and ensure the overall stability and durability of bridges. Traditional bridge expansion joint designs mostly use simple mechanical structures, such as sliding, rolling or shearing types, but such expansion joints have certain limitations in practical applications, such as large friction resistance, severe wear, frequent maintenance and replacement, and poor adaptability. Therefore, it is particularly urgent to develop a bridge expansion joint that can adapt to large-scale expansion and contraction changes, effectively reduce shock and buffer, and has high reliability and low maintenance costs. Utility Model Content

[0003] The utility model proposes a bridge expansion joint, which solves the problem that traditional bridge expansion joint designs mostly adopt simple mechanical structures, such as sliding, rolling or shearing types, but such expansion joints have certain limitations in practical applications, such as large friction resistance, severe wear, frequent maintenance and replacement, poor adaptability, etc.

[0004] The technical solution of the utility model is as follows: A bridge expansion joint, used for installation between a first bridge body and a second bridge body, comprising:

[0005] A first seat body and a second seat body, wherein the first seat body and the second seat body are used to be arranged on the first bridge body and the second bridge body respectively;

[0006] An intermediate seat, the intermediate seat being located between the first seat body and the second seat body;

[0007] a first side rotating shaft and a second side rotating shaft, wherein the first side rotating shaft and the second side rotating shaft are respectively arranged on the first seat body and the second seat body;

[0008] A connecting member, connecting the first side rotating shaft, the second side rotating shaft and the middle seat;

[0009] A first elastic member, one end of which is disposed on the middle seat, acts on the first side rotating shaft and the second side rotating shaft through the connecting member to provide resistance when the first side rotating shaft and the second side rotating shaft move relative to each other.

[0010] Optionally, the connecting member includes:

[0011] A first short chain plate and a second short chain plate, wherein the first short chain plates are two and both are hinged to the first side rotating shaft, and the second short chain plates are two and both are hinged to the second side rotating shaft;

[0012] A long chain plate, one end of which is hinged to the first short chain plate, and the other end of which is hinged to the second short chain plate;

[0013] An intermediate shaft, the number of the long chain plates is two, the two long chain plates are hinged to each other through the intermediate shaft, and the intermediate seat is arranged on the intermediate shaft.

[0014] Optionally, it also includes:

[0015] A buffer plate, wherein there are two buffer plates, and the two buffer plates are respectively arranged on both sides of the long chain plate;

[0016] A connecting plate is arranged on the middle seat, and the connecting plate and the buffer plate are connected through the first elastic member.

[0017] Optionally, it also includes:

[0018] A reel, the reel being rotatably disposed on the first seat body and / or the second seat body;

[0019] A flexible member, one end of which is connected to the reel, and the other end of which is connected to the middle seat and is rolled on the reel.

[0020] Optionally, the reel has a first turntable portion and also includes a second elastic member, wherein the second elastic member is a legal spring, one end of the legal spring is connected to the first turntable portion, and the other end is connected to the first seat body or the second seat body.

[0021] Optionally, the reel further has a second turntable portion, and further comprises:

[0022] A chuck, which is disposed on the first seat body or the second seat body, is coaxial with the second turntable portion, and has a plurality of circumferentially arranged clamping grooves, the other end of the first elastic member is disposed on the chuck, and the first elastic member is connected to the first seat body or the second seat body through the chuck;

[0023] A swinging card, which is rotatably arranged on the second turntable part and has a clamping part. After the swinging card is swung, the clamping part is clamped in the clamping groove. There are two swinging card, and the two swinging card are symmetrically arranged relative to the shaft part of the second turntable part;

[0024] A connecting rod, both ends of which are respectively hinged to the two swinging clamps;

[0025] A third elastic member, one end of which is connected to the swinging clamp, and the other end of which is connected to the second turntable portion, provides a force to move the clamp away from the clamping slot.

[0026] Optionally, the first seat body, the second seat body and the middle seat all have an installation groove and also include a waterstop strip, which is installed in the installation groove, and the waterstop strip is provided between the first seat body and the middle seat, and between the second seat body and the middle seat.

[0027] Optionally, the reel is rotatably disposed on the first seat body and / or the second seat body, specifically, the reel is rotatably disposed on the first seat body, the intermediate shaft has a through hole, and further comprises:

[0028] A buckle is arranged on the second seat body, and the end of the flexible member on the reel passes through the through hole and is connected with the buckle.

[0029] Optionally, the first elastic member and the second elastic member are springs.

[0030] Optionally, the flexible member is a rope, a belt or a chain.

[0031] The working principle and beneficial effects of the utility model are:

[0032] In the utility model, when the bridge is subjected to external forces such as temperature changes, vehicle loads or earthquakes, relative displacement will occur between the first bridge body and the second bridge body. The design purpose of this bridge expansion joint is to allow the bridge body to freely expand and contract within a certain range, while limiting excessive displacement and absorbing the impact force generated thereby. Specific working process: The first seat body and the second seat body are respectively fixed on two adjacent bridge bodies, and they are indirectly connected through an intermediate seat, so that relative movement between the two bridge bodies can be allowed. The first side shaft and the second side shaft are respectively installed on the first seat body and the second seat body, and the two side shafts are connected to the intermediate seat through a connecting piece. One end of the elastic member (such as a spring, a rubber pad, a bellows, etc.) is fixed on the intermediate seat, and the other end acts on the first side shaft and the second side shaft through a connecting piece. When the bridge body is displaced, the resistance provided by the elastic member can buffer the impact force caused by the movement of the bridge body, while limiting excessive expansion and contraction, and ensuring the stability and safety of the bridge structure. Thereby allowing the bridge body to freely expand and contract, adapting to the thermal expansion and contraction caused by the temperature difference and the deformation under the action of the load, and preventing the bridge deck from cracking or damage due to stress accumulation. The setting of elastic parts can effectively absorb and disperse impact energy, reduce the impact of vibration on the bridge structure and moving vehicles, and improve the driving comfort of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0034] Figure 1 It is a schematic diagram of the structure of the utility model;

[0035] Figure 2 It is a schematic top view of part of the structure of the utility model;

[0036] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0037] Figure 4 It is a schematic diagram of the structure of the first short chain plate, the second short chain plate, the long chain plate, the first side rotating shaft, the second side rotating shaft and the middle seat of the utility model;

[0038] Figure 5 This is a schematic diagram of the reeling structure of the utility model (reel and related components);

[0039] In the figure: 1. first bridge body; 2. second bridge body; 3. first seat body; 4. second seat body; 5. middle seat; 6. first side shaft; 7. second side shaft; 8. connecting member; 801. first short chain plate; 802. second short chain plate; 803. long chain plate; 9. first elastic member; 10. middle shaft; 1001. perforation; 11. buffer plate; 12. connecting plate; 13. reel; 1301. first turntable part; 1302. second turntable part; 14. flexible member; 15. chuck; 1501. clamping groove; 16. swinging clamp; 1601. clamping part; 17. connecting rod; 18. third elastic member; 19. mounting groove; 20. water stop; 21. buckle; 22. second elastic member. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0041] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0042] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0043] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] Reference Figure 1~Figure 5 , a bridge expansion joint is proposed, which is used to be installed between a first bridge body 1 and a second bridge body 2, comprising:

[0045] The first seat body 3 and the second seat body 4, the first seat body 3 and the second seat body 4 are used to be arranged on the first bridge body 1 and the second bridge body 2 respectively; the middle seat 5, the middle seat 5 is located between the first seat body 3 and the second seat body 4; the first side rotation axis 6 and the second side rotation axis 7, the first side rotation axis 6 and the second side rotation axis 7 are arranged on the first seat body 3 and the second seat body 4 respectively; the connecting member 8, connecting the first side rotation axis 6, the second side rotation axis 7 and the middle seat 5; the first elastic member 9, one end of the first elastic member 9 is arranged on the middle seat 5, acts on the first side rotation axis 6 and the second side rotation axis 7 through the connecting member 8, and provides resistance when the first side rotation axis 6 and the second side rotation axis 7 move relative to each other.

[0046] In this embodiment, the first seat body 3 and the second seat body 4 are respectively used as the fixed ends of the expansion joint, and are directly and firmly connected to the corresponding bridge bodies (the first bridge body 1 and the second bridge body 2). The seat body material should have sufficient strength and weather resistance to withstand the bridge body load and adapt to complex environmental conditions. The middle seat 5 is located between the first seat body 3 and the second seat body 4, forming the core activity area of ​​the expansion joint. The middle seat 5 needs to have good sliding performance and can achieve smooth and low-resistance expansion and contraction when the first seat body 3 and the second seat body 4 move relative to each other. The first side rotating shaft 6 and the second side rotating shaft 7 are respectively arranged on the first seat body 3 and the second seat body 4, as the moving fulcrums for the linkage between the connecting member 8 and the middle seat 5. The side rotating shaft should be made of high-strength and wear-resistant materials to ensure good mobility in long-term use and withstand radial and axial stresses when the expansion joint is working. The design of the connecting member 8 needs to take into account both rigidity and flexibility to ensure that during the expansion and contraction of the expansion joint, it can accurately transmit resistance and adapt to the possible slight misalignment between the bridge bodies. The first elastic member 9 is installed on the middle seat 5, and applies resistance to the first side shaft 6 and the second side shaft 7 through the connecting member 8. The first elastic member 9 can be a spring, a rubber element, a hydraulic cylinder, etc. Its function is to provide a certain rebound force or damping force when the bridge body is relatively displaced due to factors such as temperature changes and load changes, so as to limit the excessive expansion and contraction of the expansion joint and ensure the overall stability of the bridge structure and driving comfort. The selection of the first elastic member 9 should take into account factors such as its service life, fatigue resistance, and environmental adaptability. In summary, this bridge expansion joint organically integrates the first seat body 3, the second seat body 4, the middle seat 5, the side shaft, the connecting member 8 and the first elastic member 9 through a clever structural design, forming a device that can adapt to the relative displacement between the bridge bodies and provide appropriate resistance to maintain the stability of the bridge structure. It is of great significance to ensure the safe operation of the bridge and extend its service life.

[0047] Furthermore, the connecting member 8 includes: a first short chain plate 801 and a second short chain plate 802, wherein the first short chain plates 801 are two and both are hinged on the first side rotating shaft 6, and the second short chain plates 802 are two and both are hinged on the second side rotating shaft 7; a long chain plate 803, wherein one end of the long chain plate 803 is hinged to the first short chain plate 801, and the other end is hinged to the second short chain plate 802; an intermediate shaft 10, wherein the long chain plates 803 are two, and the two long chain plates 803 are hinged to each other through the intermediate shaft 10, and the intermediate seat 5 is arranged on the intermediate shaft 10.

[0048] In this embodiment, two first short chain plates 801 are respectively installed at the two ends of the first side shaft 6 by hinged means, so that when the first bridge body 1 moves, the first short chain plates 801 can swing freely following the rotation and displacement of the bridge body. Similarly, there are two second short chain plates 802, which are also hinged on the second side shaft 7 to respond to the displacement change of the second bridge body 2. There are also two long chain plates 803, which are hinged to the first short chain plate 801 and the second short chain plate 802 respectively. Specifically, one end of each long chain plate 803 is connected to a first short chain plate 801 through a hinged structure, and the other end is connected to a second short chain plate 802. In this way, the long chain plate 803 is like the skeleton of the bridge expansion joint, converting the displacement of the first bridge body 1 and the second bridge body 2 into the bending and extension movement of the chain plate. The two long chain plates 803 are hinged to each other through the intermediate shaft 10 to form a chain-like structure, which enhances the structural stability and bearing capacity of the entire connecting member 8. The intermediate shaft 10 not only serves as a pivot connecting the long chain plate 803, but also has an intermediate seat 5 in the middle, so that the entire expansion joint structure can be more firmly fixed in the expansion position of the bridge. In the actual working process, when the first bridge body 1 and the second bridge body 2 produce relative displacement due to temperature changes, load changes, etc., the first side shaft 6 and the second side shaft 7 will drive the first short chain plate 801 and the second short chain plate 802 to rotate, and then through the linkage of the long chain plate 803 and the intermediate shaft 10, the displacement is converted into the stretching or compression of the elastic member. The resistance provided by the elastic member can effectively control the expansion and contraction movement of the bridge body, and at the same time alleviate the impact force caused by the displacement of the bridge body, ensuring the safety and stability of the bridge structure.

[0049] Furthermore, it also includes: a buffer plate 11, two buffer plates 11, and the two buffer plates 11 are respectively arranged on both sides of the long chain plate 803; a connecting plate 12, the connecting plate 12 is arranged on the middle seat 5, and the connecting plate 12 and the buffer plate 11 are connected by a first elastic member 9.

[0050] In this embodiment, two buffer plates 11 are provided, and the two buffer plates 11 are respectively installed on both sides of the long chain plate 803. The main function of the buffer plate 11 is to absorb and disperse the impact force and vibration generated by the bridge body during the movement. A connecting plate 12 is added to the middle seat 5. The connecting plate 12 is connected to the buffer plates 11 on both sides through the first elastic member 9, playing a connecting role. The first elastic member 9 can be an elastic element such as a spring, a rubber block, a bellows, etc. The first elastic member 9 further acts on the first side shaft 6 and the second side shaft 7 by acting on the two buffer plates 11. It can provide a certain resistance when squeezed or stretched, limit the excessive expansion and contraction of the bridge body, and at the same time absorb the impact energy when the bridge body moves to a certain extent, ensure the smooth transition of the bridge during the expansion and contraction process, and effectively improve the safety of the bridge and the driving comfort of passengers.

[0051] Furthermore, it also includes: a reel 13, which is rotatably arranged on the first seat body 3 and / or the second seat body 4; and a flexible member 14, one end of which is connected to the reel 13, and the other end of which is connected to the middle seat 5, and is rolled on the reel 13.

[0052] In this embodiment, the reel 13 is designed to be rotatably arranged on the first seat body 3 and / or the second seat body 4. The existence of the reel 13 enables the expansion joint to adjust the position and length of the flexible member 14 by rotating the reel 13 when responding to the expansion and contraction of the bridge body due to temperature changes, load changes, etc., thereby achieving effective control of the relative displacement of the bridge body. One end of the flexible member 14 is connected to the reel 13, and the other end is connected to the middle seat 5 and is wound on the reel 13. The flexible member 14 can be made of materials with excellent elasticity and flexibility, such as high-strength steel wire rope, rubber strip or composite material belt. When the bridge body is displaced, the reel 13 rotates, driving the flexible member 14 to expand or contract, thereby absorbing and alleviating the expansion and contraction deformation and impact force of the bridge body, and at the same time limiting the excessive displacement of the bridge body. The advantage of this design is that through the cooperation of the reel 13 and the flexible member 14, not only the adaptability and flexibility of the bridge expansion joint are improved, but also the force and deformation of the bridge body during expansion and contraction can be more accurately controlled, greatly improving the safety and durability of the bridge structure. In addition, the winding structure of the flexible member 14 helps to save space and simplify maintenance work.

[0053] Furthermore, the reel 13 has a first turntable portion 1301 and also includes a second elastic member 22 . The second elastic member 22 is a legal spring. One end of the legal spring is connected to the first turntable portion 1301 , and the other end is connected to the first seat body 3 or the second seat body 4 .

[0054] In the present embodiment, in the improved design of the bridge expansion joint, an important component of the reel 13 is the first turntable portion 1301. Its function is to change the tension or relaxation state of the flexible member 14 connected thereto through rotational motion, so as to adapt to the expansion and contraction requirements of the bridge caused by factors such as temperature changes and load changes. In addition, the second elastic member 22 adopts the design of a disc spring. With its special disc structure, the disc spring can provide a large elastic restoring force in a small space. One end of the disc spring is connected to the first turntable portion 1301 of the reel 13, and the other end is connected to the first seat body 3 or the second seat body 4. When the bridge body in the bridge expansion joint is displaced, the reel 13 drives the first turntable portion 1301 to rotate. Through the elastic characteristics of the disc spring, on the one hand, it can provide a certain resistance to the expansion and contraction movement of the bridge body to prevent excessive displacement; on the other hand, it can also absorb and release the energy generated by the displacement, play a buffering and shock absorbing effect, thereby effectively protecting the bridge structure from damage and improving the overall stability and durability of the bridge. At the same time, the compact structure and powerful energy storage characteristics of disc springs also provide strong support for the functional optimization and miniaturization design of bridge expansion joints.

[0055] Furthermore, the reel 13 also has a second turntable portion 1302, and further includes:

[0056] The chuck 15 is arranged on the first base body 3 or the second base body 4, is coaxial with the second turntable part 1302, and has a plurality of circumferentially arranged clamping grooves 1501. The other end of the first elastic member 9 is arranged on the chuck 15, and the first elastic member 9 is connected to the first base body 3 or the second base body 4 through the chuck 15; the swinging clamp 16, the swinging clamp 16 is rotatably arranged on the second turntable part 1302, and has a clamping part 1601. The swinging clamp 16 After swinging, the clamping part 1601 is stuck in the clamping groove 1501. There are two swinging clamps 16, and the two swinging clamps 16 are symmetrically arranged relative to the axis of the second turntable part 1302; the connecting rod 17, the two ends of the connecting rod 17 are respectively hinged to the two swinging clamps 16; the third elastic part 18, one end of the third elastic part 18 is connected to the swinging clamp 16, and the other end is connected to the second turntable part 1302, providing force to move the clamping part 1601 away from the clamping groove 1501.

[0057] In this embodiment, the second turntable portion 1302 should be coaxially arranged with the reel 13 and fixedly connected with the reel 13 to ensure that the second turntable portion 1302 can rotate synchronously when the reel 13 rotates. A chuck 15 is arranged on the first seat body 3 or the second seat body 4. The chuck 15 is coaxially arranged with the second turntable portion 1302 and fixedly connected with the first seat body 3 or the second seat body 4 to ensure that the chuck 15 can rotate synchronously when the reel 13 rotates. The chuck 15 is provided with a plurality of circumferentially arranged clamping grooves 1501 for cooperating with the clamping portion 1601 of the swing clamp 16 to achieve locking of the reel 13. The two swing clamps 16 are symmetrically arranged relative to the shaft of the second turntable portion 1302 so as to achieve synchronous action through the connecting rod 17. One end of the third elastic member 18 is connected to the swing clamp 16, and the other end is connected to the second turntable portion 1302. The third elastic member 18 should ensure that a moderate pulling force is always applied to the swinging clamp 16 during the operation of the reel 13, so as to maintain the connection between the swinging clamp 16 and the chuck 15, and ensure the locking of the reel 13. In this embodiment, by adding the second turntable portion 1302, and adding components such as the chuck 15, the swinging clamp 16, the connecting rod 17 and the third elastic member 18, a mechanism capable of realizing the rapid locking of the reel 13 is formed. When the first bridge body 1 and the second bridge body 2 undergo rapid relative displacement, the swinging clamp 16 swings under the action of centrifugal force, so that the clamping portion 1601 is clamped in the clamping groove 1501 of the chuck 15, and the reel 13 is quickly locked.

[0058] Furthermore, the first seat body 3 , the second seat body 4 and the middle seat 5 all have an installation groove 19 , and also include a waterstop 20 . The waterstop 20 is installed in the installation groove 19 , and there is a waterstop 20 between the first seat body 3 and the middle seat 5 , and between the second seat body 4 and the middle seat 5 .

[0059] In this embodiment, a mechanism capable of achieving waterproof sealing is formed by adding the installation groove 19 and the water stop 20. When the first bridge body 1 and the second bridge body 2 are relatively displaced, the water stop 20 closes the gaps between the first seat body 3, the second seat body 4 and the middle seat 5 through the installation groove 19, forming a good waterproof seal, preventing moisture from entering the expansion joint, further improving the waterproof performance of the expansion joint, enhancing the service life of the expansion joint, and improving the safety and reliability of the bridge structure.

[0060] Further, the reel 13 is rotatably disposed on the first seat body 3 and / or the second seat body 4, specifically, the reel 13 is rotatably disposed on the first seat body 3, the intermediate shaft 10 has a through hole 1001, and further includes:

[0061] The buckle 21 is disposed on the second base body 4 , and the end of the flexible member 14 on the reel 13 passes through the through hole 1001 and is connected to the buckle 21 .

[0062] In this embodiment, a related structure is provided when the number of the reels 13 is one. Specifically, one end of the flexible member 14 is set on the reel 13, the middle part passes through the through hole 1001, and the other end is set on the buckle 21. A related snap-on device can be set in the hole to fix the intermediate shaft 10 and the flexible member 14 together, so that the flexible member 14 moves synchronously with the intermediate shaft 10.

[0063] Furthermore, the first elastic member 9 and the third elastic member 18 are springs.

[0064] In this embodiment, the necessary buffering force and restoring force are provided by the elastic characteristics of the spring to adapt to the expansion and contraction requirements of the bridge caused by factors such as temperature changes and load changes.

[0065] Furthermore, the flexible member 14 is a rope, a belt or a chain.

[0066] In this embodiment, the flexible member 14 is defined as a rope body, a belt body or a chain body. According to the engineering requirements and environmental conditions, a rope, a belt material or a chain can be selected as the flexible connection component between the intermediate seat 5 and the reel 13. The rope body, such as a high-strength steel wire rope, is suitable for occasions requiring a large telescopic stroke and good flexibility due to its light weight, high strength and good softness. The belt body, such as a steel belt, a synthetic fiber belt or a composite material belt, has good lateral stability and certain flexibility, and is suitable for situations where it is necessary to evenly distribute the force and prevent damage caused by excessive bending. The chain body, such as a high-strength chain, is suitable for harsh environments that need to withstand large loads and frequent telescopic movements due to its strong tensile strength and wear resistance. Regardless of the type of flexible member 14 selected, its main function is to transmit force and displacement by winding on the reel 13 and between the first seat body 3 and the second seat body 4, and at the same time use its own elastic deformation to absorb and release the stress caused by factors such as temperature changes and load changes in the bridge structure, so as to ensure that the bridge expansion joint can work stably and safely under various working conditions.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A bridge expansion joint, used for installation between a first bridge body (1) and a second bridge body (2), characterized in that: include: A first base body (3) and a second base body (4), wherein the first base body (3) and the second base body (4) are used to be arranged on the first bridge body (1) and the second bridge body (2) respectively; An intermediate seat (5), the intermediate seat (5) being located between the first seat body (3) and the second seat body (4); A first side rotating shaft (6) and a second side rotating shaft (7), wherein the first side rotating shaft (6) and the second side rotating shaft (7) are respectively arranged on the first base body (3) and the second base body (4); A connecting member (8) connecting the first side rotating shaft (6), the second side rotating shaft (7) and the middle seat (5); A first elastic member (9), one end of which is arranged on the intermediate seat (5), and acts on the first side rotating shaft (6) and the second side rotating shaft (7) through the connecting member (8), so as to provide resistance when the first side rotating shaft (6) and the second side rotating shaft (7) move relative to each other.

2. A bridge expansion joint according to claim 1, characterized in that: The connecting member (8) comprises: A first short link plate (801) and a second short link plate (802), wherein the first short link plates (801) are two and both are hinged on the first side rotating shaft (6), and the second short link plates (802) are two and both are hinged on the second side rotating shaft (7); A long chain plate (803), one end of the long chain plate (803) is hinged to the first short chain plate (801), and the other end of the long chain plate (803) is hinged to the second short chain plate (802); An intermediate shaft (10), the number of the long chain plates (803) is two, the two long chain plates (803) are hinged to each other via the intermediate shaft (10), and the intermediate seat (5) is arranged on the intermediate shaft (10).

3. A bridge expansion joint according to claim 2, characterized in that: Also includes: A buffer plate (11), wherein two buffer plates (11) are provided, and the two buffer plates (11) are respectively arranged on both sides of the long chain plate (803); A connecting plate (12), wherein the connecting plate (12) is arranged on the intermediate seat (5), and the connecting plate (12) and the buffer plate (11) are connected via the first elastic member (9).

4. A bridge expansion joint according to claim 3, characterized in that: Also includes: a reel (13), the reel (13) being rotatably disposed on the first seat (3) and / or the second seat (4); A flexible member (14), one end of which is connected to the reel (13), and the other end of which is connected to the middle seat (5), and is rolled up on the reel (13).

5. A bridge expansion joint according to claim 4, characterized in that: The reel (13) has a first turntable portion (1301) and also includes a second elastic member (22), wherein the second elastic member (22) is a legal spring, one end of which is connected to the first turntable portion (1301), and the other end of which is connected to the first seat body (3) or the second seat body (4).

6. A bridge expansion joint according to claim 4, characterized in that: The reel (13) further comprises a second turntable portion (1302), and further comprises: a chuck (15), the chuck (15) being arranged on the first seat body (3) or the second seat body (4), being coaxial with the second turntable portion (1302), and having a plurality of circumferentially arranged clamping grooves (1501), the other end of the first elastic member (9) being arranged on the chuck (15), and the first elastic member (9) being connected to the first seat body (3) or the second seat body (4) via the chuck (15); A swinging card (16), the swinging card (16) is rotatably arranged on the second turntable portion (1302), and has a clamping portion (1601). After the swinging card (16) is swung, the clamping portion (1601) is clamped in the clamping groove (1501). There are two swinging card members (16), and the two swinging card members (16) are symmetrically arranged relative to the axis of the second turntable portion (1302); A connecting rod (17), the two ends of which are respectively hinged to the two swinging clamps (16); A third elastic member (18), one end of the third elastic member (18) is connected to the swinging clamp (16), and the other end is connected to the second turntable portion (1302), providing a force to move the clamping portion (1601) away from the clamping groove (1501).

7. The bridge expansion joint according to claim 1, characterized in that: The first seat body (3), the second seat body (4) and the middle seat (5) all have an installation groove (19), and also include a water stop strip (20). The water stop strip (20) is installed in the installation groove (19). The water stop strip (20) is provided between the first seat body (3) and the middle seat (5), and between the second seat body (4) and the middle seat (5).

8. A bridge expansion joint according to claim 4, characterized in that: The reel (13) is rotatably mounted on the first seat (3) and / or the second seat (4), specifically, the reel (13) is rotatably mounted on the first seat (3), the intermediate shaft (10) has a through hole (1001), and further comprises: A buckle (21), wherein the buckle (21) is arranged on the second seat body (4), and an end of the flexible member (14) on the reel (13) passes through the through hole (1001) and is connected to the buckle (21).

9. The bridge expansion joint according to claim 5, characterized in that: The first elastic member (9) and the second elastic member (22) are springs.

10. A bridge expansion joint according to claim 4, characterized in that: The flexible member (14) is a rope body, a belt body or a chain body.

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