阅读说明：本技术 固体粘滞阻尼器及其在梳齿板式伸缩装置中的应用 (Solid viscous damper and application thereof in comb plate type telescopic device ) 是由 梁建 葛永刚 于 2020-08-11 设计创作，主要内容包括：本发明属于桥梁伸缩装置附属装置,特别是指一种固体粘滞阻尼器及其在梳齿板式伸缩装置中的应用。固体粘滞阻尼器包括下端封闭且顶端开口的缸体,沿纵向设置于缸体内的缸杆,所述的缸体内设有弹塑性体,缸杆中部及下端埋设于弹塑性体内且其下端与缸体底部设有配合间隙。本发明解决了现有技术存在的伸缩装置在受到车辆冲击等作用下易被破坏且噪音大等问题。具有构造简单、维护及运行方便,可有效降低噪音,减少因外界因素变化及车辆冲击对伸缩装置造成的振动破坏等优点。(The invention belongs to an auxiliary device of a bridge expansion device, and particularly relates to a solid viscous damper and application thereof in a comb plate type expansion device. The solid viscous damper comprises a cylinder body with a closed lower end and an open top end, and a cylinder rod longitudinally arranged in the cylinder body, wherein an elastoplastomer is arranged in the cylinder body, the middle part and the lower end of the cylinder rod are embedded in the elastoplastomer, and a fit clearance is arranged between the lower end of the cylinder rod and the bottom of the cylinder body. The invention solves the problems that the telescopic device in the prior art is easy to damage and has high noise under the action of vehicle impact and the like. The telescopic device has the advantages of simple structure, convenient maintenance and operation, effective noise reduction, reduction of vibration damage to the telescopic device caused by external factor change and vehicle impact, and the like.)

1. The solid viscous damper comprises a cylinder body (3B) with a closed lower end and an open top end, and a cylinder rod (3A) longitudinally arranged in the cylinder body (3B), and is characterized in that an elastoplastomer (3C) is arranged in the cylinder body (3B), the middle part and the lower end of the cylinder rod (3A) are embedded in the elastoplastomer (3C), and a fit clearance is arranged between the lower end of the cylinder rod and the bottom of the cylinder body (3B).

2. The solid viscous damper according to claim 1, characterized in that the cylinder rod (3A) is a variable diameter rod structure, and the cylinder rod (3A) is further provided with at least one protrusion (3D).

3. A solid viscous damper according to claim 1, characterized in that the fitting clearance of the lower end of the cylinder rod (3A) from the bottom of the cylinder body (3B) is more than 1 mm.

4. A solid viscous damper according to any one of claims 1-3, characterized in that the projections (3D) are arranged in the radial direction of the cylinder rod (3A), and the projections (3D) are in the form of one or a combination of disc-shaped, plate-shaped, rod-shaped members.

5. A solid viscous damper according to claim 4, characterized in that the protrusion (3D) is embedded inside the elastoplastic body (3C).

6. The solid viscous damper according to claim 4, characterized in that the projection (3D) is a disk-shaped projection provided at the bottom end of the cylinder rod (3A) and arranged in the radial direction of the cylinder rod (3A).

7. A solid viscous damper according to claim 1, characterized in that the elastoplastic body (3C) is one or a combination of modified rubber, modified silica gel, gel material based on polyborosiloxane, modified bitumen.

8. The solid viscous damper according to claim 1, characterized in that the top of the cylinder rod (3A) is provided with a connection or interface adapted to a comb plate type telescopic device.

9. The solid viscous damper according to claim 8, characterized in that the connecting part or interface is a screw opening which is opened at the top of the cylinder rod (3A) and is matched with the movable toothed plate (1) or the fixed toothed plate (2) of the comb type telescopic device.

10. A solid viscous damper according to claim 1, characterized in that the top of the cylinder block (3B) is provided with a cylinder head (3E) adapted thereto, and the top of the cylinder rod (3A) extends to the outside through an opening in the cylinder head (3E).

11. A solid viscous damper according to claim 1, characterized in that the cylinder (3B) can take one of a cylindrical, elliptic cylindrical, regular polygonal cylindrical, rectangular parallelepiped or square shape.

12. Use of a solid viscous damper according to any of claims 1-11 in a comb-plate type telescopic device.

13. The application of the viscous damper is characterized in that the top end of a cylinder rod (3A) of the viscous damper is fixedly assembled with the tail part of a movable toothed plate (1) or a fixed toothed plate (2) or the tail parts of the movable toothed plate (1) and the fixed toothed plate (2) of the comb-type telescopic device, and a cylinder barrel (3B) is arranged below the movable toothed plate (1) or the fixed toothed plate (2) and fixed with embedded steel bars in a concrete structure on one side of a beam end gap (5).

14. The application of the viscous damper as claimed in claim 13, wherein the outside of the cylinder (3B) of the viscous damper is fixed with the anchoring member (6), and the anchoring member (6) is fixed with the embedded steel bar in the concrete structure at one side of the beam end gap (5).

15. The use according to any one of claims 12-14, characterized in that the top end of the cylinder rod (3A) is threaded with the tail of the movable toothed plate (1) or the fixed toothed plate (2) and then fastened by bolts.

Technical Field

The invention belongs to an auxiliary device of a bridge expansion device, and particularly relates to a solid viscous damper and application thereof in a comb plate type expansion device.

Background

The bridge structure can be lengthened or shortened due to factors such as temperature change, concrete shrinkage and settlement and rotation of creep bridge abutments, and in order to enable vehicles to stably pass through the bridge deck and meet the requirement of deformation, an expansion joint device is required to be arranged on the bridge to meet the requirement of displacement of the bridge. The bridge is at the sudden change of telescoping device position rigidity, and the vehicle reciprocates and constantly causes the impact to the telescoping device, and the pinion rack vibration produces the noise, and long-term impact causes the damage of telescoping device lower part concrete structure and pinion rack simultaneously, thereby leads to the telescoping device to become invalid when serious and seriously influences current safety.

Because the telescoping device constantly receives vehicle impact load's effect, so need be connected with the roof beam body through anchor subassembly, from the anchor subassembly angle of starting to require again to cushion vehicle impact effect when guaranteeing anchor strength, this is difficult to do to current telescoping device. The existing telescopic device is directly screwed by adopting an anchoring bolt, so that the connection strength is ensured, the vibration is avoided, and finally, the telescopic device becomes loose and falls off and fails in the using process gradually. Or the prestressed spring and the rubber are adopted for vibration reduction, so that the rubber is easy to age, and the actual using effect is influenced. The prestressed spring is easy to lose efficacy after being stressed for a long time, and the consequence is more serious once the prestressed spring loses efficacy.

While damping and buffering, the telescopic device also needs to adapt to the normal displacement of the beam body caused by temperature change and the vertical corner generated under the influence of factors such as vehicle load, beam body creep, bridge pier (platform) uneven settlement, temperature difference and the like. The telescoping device needs to realize the multidirectional requirement that shifts, avoids the pinion rack perk, blocks and dunes and influences safe in utilization and driving travelling comfort.

Based on the above reasons, the telescoping device is firstly to guarantee intensity and resist the impact, is secondly to realize the damping and fall the noise, and is thirdly to realize multidirectional shifting, and current telescoping device has hardly satisfied above-mentioned demand simultaneously, and various problems can appear in the use. Therefore, a telescopic device capable of reducing vibration and noise and satisfying the requirement of multidirectional displacement of a beam body is researched.

Dampers are devices that provide resistance to movement and dissipate the energy of the movement. Different damping effects can be achieved when the damper is used in different places or under different working environments. For example for vibration damping; the device is used for resisting shock, allows movement at low speed, and is locked when the speed or acceleration exceeds a corresponding value, so that rigid support is formed. Various dampers (or shock absorbers) have been used in the aerospace, aviation, military, gun, automobile and other industries to reduce vibration and dissipate energy. Since the seventies of the twentieth century, people gradually transferred the technologies to structural engineering such as buildings, bridges, railways and the like, and the development of the technologies is very rapid. Especially, the hydraulic viscous damper with history of over fifty years is subjected to a great amount of experiments, strict examination and repeated demonstration before being accepted by the structural engineering world in the united states, especially a long process of earthquake examination.

Viscous dampers are currently used in bridges in relation to speed switches which become a rigid connection in the case of a vibrating operation and a freely movable connection in the free state. Under any sudden load (such as earthquake, brake, train acceleration, vehicle and vessel collision, storm or any other impact), the bridge is suddenly moved, and the viscous damper becomes a rigid connecting device. The viscous damper allows relative movement between the bridge plate and the pier when normal thermal expansion and cold contraction occur.

The object is deformed under the action of external force, and the property of completely recovering the original shape after the external force is eliminated is called elasticity; the property of little or no recovery after removal of the external force is called plasticity. Under certain mechanical conditions (such as magnitude, acting time and acting mode of external force), solid substances often have elasticity and plasticity, are in a plastic state under the action of low buffer force, and have elasticity under the action of impact force or short-time pressure stress, and the objects are called elastic plastomers, which are called elastic plastomers for short.

The applicant does not find patent literature reports which are the same as or similar to the patent literature reports in the domestic patent database, no relevant research is found on the adoption of the viscous damper to realize vibration and noise reduction of the expansion device at present, no research is carried out before the viscous damper is applied to the bridge expansion device, only rubber, springs and other buffer components are used in the published literature reports and practical application, and the actual vibration and noise reduction and impact mitigation effects are poor.

Disclosure of Invention

The invention aims to provide a solid viscous damper and application thereof in a comb plate type telescopic device, which can reduce vibration noise while adapting to the impact action of a vehicle, adapt to the change of any angle of a beam end and ensure the driving comfort.

The overall technical concept of the invention is as follows:

the solid viscous damper comprises a cylinder body with a closed lower end and an open top end, and a cylinder rod longitudinally arranged in the cylinder body, wherein an elastoplastomer is arranged in the cylinder body, the middle part and the lower end of the cylinder rod are embedded in the elastoplastomer, and a fit clearance is arranged between the lower end of the cylinder rod and the bottom of the cylinder body.

The elastoplastic body involved in the invention has enough elasticity and plasticity in terms of manufacturing materials; has enough adhesiveness and waterproofness; higher deformability and lower compressive stress; a higher softening point and a sufficiently low brittleness temperature; and has good fluidity and higher flash point under the condition of higher than melting temperature.

The application of the solid viscous damper in the comb plate type telescopic device.

The specific technical concept of the invention comprises the following steps:

in order to further improve the combination firmness of the cylinder rod and the elastic plastic body and improve the structural strength of the cylinder rod. The cylinder rod is of a reducing rod structure, and at least one protruding part is further arranged on the cylinder rod.

In order to realize that the elastic plastic body of the cylinder rod can better play a role under the conditions of compression and tension, the fit clearance between the lower end of the cylinder rod and the bottom of the cylinder body is larger than 1 mm.

On the premise of further improving the combination firmness of the cylinder rod and the elastoplastic body and the structural strength of the cylinder rod, in order to facilitate the industrial manufacture of the cylinder rod, the technical implementation means is preferably that the protrusion part is arranged along the radial direction of the cylinder rod, and the protrusion part adopts one or a combination of disc-shaped, plate-shaped and rod-shaped members, in order to facilitate the industrial manufacture of the cylinder rod.

In order to meet the matching degree between the cylinder rod and the elastic plastic body and achieve better vibration and noise reduction effects, the preferable technical implementation means is that the protruding part is embedded in the elastic plastic body.

Furthermore, in order to better exert the function and effect of the elastic plastic body, the preferable technical implementation means is that the bulge adopts a disc-shaped bulge which is positioned at the bottom end of the cylinder rod and is arranged along the radial direction of the cylinder rod.

The elastoplastomer is one or a combination of modified rubber, modified silica gel, gel material based on polyborosiloxane and modified asphalt. The modified rubber, the modified silica gel and the modified asphalt in the materials are all the prior art or the commercial products and can be obtained by adopting a method of outsourcing or self-preparation.

The applicant needs to say that the gel material based on polyborosiloxane in the above materials belongs to a strain rate sensitive material, the strain rate sensitive material is a strain rate sensitive adaptive material, and the strain rate sensitive material is a commercially available product. The material has the unique properties of excellent strain rate sensitivity, adaptability, self-repairability and the like. In the molecular structure of polyborosiloxane, an electron-deficient boron atom will gain electrons from an oxygen atom with an electron pair in the adjacent molecule, and a key structure, B-O, which determines the properties of P4U is formed between the molecules. The interaction can absorb heat energy to activate and break under the condition of room temperature, so that the material can have the deformation characteristic like plasticine when the material is not stressed. When high-speed impact or high-frequency vibration is encountered, the action time is shorter than the time of thermal cracking of the cross-linked bonds, but molecules can form a network structure, and the characteristics of shock absorption, high elasticity, even high elasticity-rigidity transformation and the like are shown.

In order to facilitate the connection between the cylinder rod and the comb plate type telescopic device, the preferable technical implementation means is that the top of the cylinder rod is provided with a connecting part or an interface matched with the comb plate type telescopic device.

More preferably, the connecting part or the interface adopts a screw opening which is arranged at the top of the cylinder rod and is matched with a movable toothed plate or a fixed toothed plate of the comb plate type telescopic device.

In order to prevent sundries from entering the cylinder body and influencing the characteristics and the damping effect of the elastoplastomer, the preferable technical implementation means is that the top of the cylinder body is provided with a cylinder cover matched with the cylinder body, and the top of the cylinder rod extends to the outside through an opening on the cylinder cover.

The cylinder body is mainly used for accommodating the elastic plastic body and the cylinder rod, meanwhile, enough space is reserved for displacement and rotation of the cylinder rod, the specific shape of the cylinder body can be flexibly selected and arranged according to needs, and the preferable and realizable technical means comprise that the cylinder body can be in one of a cylinder shape, an elliptic cylinder shape, a regular polygon prism shape, a cuboid or a square shape.

Because the movable toothed plate of fishback formula telescoping device is longer, and at vehicle impact, the temperature variation, concrete shrinkage and creep bridge pier subside and rotate the easy vibration that produces down of factor effect such as, preferred technological means of realizing is, the jar pole top of solid viscous damper and fishback formula telescoping device's movable toothed plate afterbody, or fixed toothed plate afterbody, or movable toothed plate and fixed toothed plate's afterbody fixed mounting, the cylinder sets up in movable toothed plate or fixed toothed plate below and is fixed with the pre-buried reinforcing bar in the beam-ends clearance one side concrete structure.

The applicant needs to say that, because the fixed toothed plate is short in length, the fixed toothed plate is not easy to vibrate when being subjected to external factors such as vehicle impact and the like, and therefore, whether the solid viscous damper in the application is installed or not can be determined in practice according to requirements.

In order to realize the fixation of the cylinder barrel, the preferable technology realizes that a plurality of sections are that an anchoring part is fixed on the outer side of the cylinder barrel of the solid viscous damper, and the anchoring part is fixed with embedded steel bars in a concrete structure on one side of a beam end gap.

More preferably, the cylinder rod and the movable toothed plate or the fixed toothed plate are assembled in a manner that the top end of the cylinder rod is fastened with the tail of the movable toothed plate through bolts after penetrating through the tail of the movable toothed plate.

The applicant needs to state that:

in the description of the present invention, the terms "lower end", "bottom end", "middle", "top", "bottom", "radial", "top", "lower", "top", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of simplifying the description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

To the extent that the applicant knows, no relevant methods for testing the performance of the product similar to the present application are found in the existing national standards or technical specifications, and in order to verify the effect of the present invention, the applicant performs the following tests, and the test procedures and results are as follows:

1. the test site comprises: taihang mountain high speed chen stage;

2. test time: 7/6/2020;

3. the participants: geqionggang, wei chunqing, zhao jie, gaojianhua, wangfei, guo le;

4. the test basis is as follows: the vehicle is carried out by measuring the acceleration amplitude variation and the duration time of vibration of toothed plates at two sides of a comb plate type expansion joint by an acceleration sensor through a comb plate type expansion device, and the amplitude of the toothed plates can be obtained by the acceleration through integral calculation, so that an applicant directly measures the acceleration and indirectly reflects the vibration amplitude and the vibration time;

5. the equipment and apparatus used: the system comprises an acceleration sensor, a continuous constant current adapter and a notebook computer;

6. the test steps are as follows:

(1) selecting two comb plate type test expansion devices with the same expansion amount, wherein the expansion device A is an expansion device of other comb plates, and the expansion device B is an expansion device (provided with a solid viscous damper) in the invention;

(2) piezoelectric acceleration sensors are arranged on two sides of a movable toothed plate of the expansion device A and used for measuring vibration acceleration of the toothed plate, the acceleration sensors are directly placed on two sides of a cross seam of the movable toothed plate and are equal to the gap distance of the expansion seam, the acceleration sensors are connected with a constant-current adapter and output to a computer through a data acquisition card, test panel software is installed on the computer, and vibration data can be directly read out;

(3) in the test, M1 vehicles (see GB/T15089-2001) with the mass of 1300kg-2000kg are selected and prepared, and the vehicles pass through the telescopic device A at the constant speed of 120 km/h;

(4) repeating the test steps (2) and (3), and measuring the telescopic device B;

(5) through a plurality of tests, recording vibration acceleration peak values when the vehicle passes through the telescopic device A and the telescopic device B, and comparing measurement results;

7. and (3) test results:

through a plurality of tests, the vibration acceleration peak value and the acceleration sensing when the vehicle passes through the comb plate type telescopic device A, B are recordedThe ware sets up respectively in the swing tooth board both sides, and one side is the anchor end, and the opposite side is the movable end, and experimental data is shown as table 1, table 2, and acceleration sensor is with 1g as standard acceleration unit, and 1g is 9.8m/s ═ 9.8m/s²1mg equals 1/1000 g.

The analysis can obtain that the telescoping device anchor end and the expansion end vibration condition that adopt solid viscous damper are approximately equal, and other fishback telescoping device expansion end vibration conditions are obviously greater than the anchor end, and the telescoping device that adopts solid viscous damper is behind the vehicle impact, and vibration acceleration amplitude is obviously less than ordinary fishback telescoping device's vibration acceleration amplitude, explains that the telescoping device amplitude that adopts solid viscous damper obviously reduces.

The whole vibration process is the damped vibration of a simple supported beam, the duration time of the vibration acceleration value in the same interval is selected as the vibration duration time of the telescopic device through data collection of the whole vibration process, and because the vibration acceleration of the telescopic device is obviously smaller than the acceleration of other comb plate telescopic devices, and the acceleration of other comb plate telescopic devices needs a long time to be damped to the level of the telescopic device, the vibration duration time does not need to be compared in detail, and the vibration duration time of the telescopic device adopting the solid viscous damper is obviously shorter than the vibration duration time of the common comb plate telescopic device.

TABLE 1 amplitude of vibration acceleration at anchoring end

TABLE 2 amplitude of vibration acceleration at active end

In conclusion, through analysis of measured data, on the premise of equal construction quality and expansion amount, compared with other existing comb plate expansion devices, the product provided by the invention can effectively reduce vibration amplitude and vibration duration of the comb plate under the impact action, so that the vibration reduction and noise reduction functions are achieved.

The invention has the substantive characteristics and the obvious technical progress that:

1. the solid viscous damper adopts the cylinder barrel, the elastic plastic body and the cylinder rod as main structures, and has simple integral structure and convenient use and maintenance. Because the cylinder pole all fills all around has the elastoplastomer and sufficient clearance, to the vertical impact load that the cylinder pole transmission comes, the elastoplastomer can be expressed as the rigidity, restricts cylinder pole upwards or downstream, simultaneously because the elastomer structure of itself, effectively reduces the pinion rack because of the vibration that the impact produced, simultaneously the noise reduction. For the normal displacement and rotation of the beam body, the elastic plastic body is flexible and can slowly adapt to the deformation requirement, so that the elastic and plastic conversion is effectively realized.

2. The solid viscous damper can realize the functions of vibration and noise reduction, is arranged below the movable toothed plate or the fixed toothed plate, plays a role in the elastic function of an elastoplastomer in the solid viscous damper when a vehicle impacts, and the elastoplastomer is changed into a rigid member to resist the impact action so as to reduce the impact damage of toothed plate vibration to a concrete structure, improve the driving comfort of drivers and passengers and prolong the maintenance period of the telescopic device; after the impact, the toothed plate can continuously vibrate to generate noise, the plastic function of the elastic plastic body plays a role, the elastic plastic body becomes a flexible component, and the damping is increased to reduce the vibration and the noise.

3. The structural design of the convex part effectively increases the strength of the cylinder rod, increases the matching degree of the cylinder rod and the elastic plastic body, effectively avoids the cylinder rod from being forced to be separated from the elastic plastic body, and ensures the operation stability of the damper when the function of the elastic plastic body is fully exerted.

4. The elastic-plastic body is filled in the cylinder body around the cylinder rod and has enough movable clearance, the elastic-plastic body is slowly compressed, the movement and the rotation in all directions can be realized, and the requirement of arbitrary displacement of the beam end can be realized; the elastoplastomer has wide selection and source, can be purchased or prepared by self flexibly according to the actual needs of engineering, and is convenient to use, maintain and replace.

5. The structural design of cylinder cap can effectively avoid external debris to get into the cylinder body, provides the work environment of airtight relatively for the elastoplastomer in the cylinder body, improves its life, prolongs the maintenance cycle of attenuator.

Drawings

Detailed Description

The embodiments of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited thereto. The protection scope of the present invention is subject to the content of the claims, and any equivalent technical means made according to the specification can be substituted without departing from the protection scope of the present invention.

The whole structure of the embodiment is shown in the figure, wherein the solid viscous damper comprises a cylinder body 3B with a closed lower end and an open top end, and a cylinder rod 3A arranged in the cylinder body 3B along the longitudinal direction, an elastoplastomer 3C is arranged in the cylinder body 3B, the middle part and the lower end of the cylinder rod 3A are embedded in the elastoplastomer 3C, and a matching gap is arranged between the lower end of the cylinder rod and the bottom of the cylinder body 3B.

The elastoplastic body in the embodiment has enough elasticity and plasticity in terms of manufacturing material; sufficient adhesion and water resistance; higher deformability and lower compressive stress; a higher softening point and a sufficiently low brittleness temperature; and has good fluidity and higher flash point under the condition of higher than melting temperature.

The cylinder rod 3A is of a reducing rod structure, and at least one protruding part 3D is further arranged on the cylinder rod 3A. The protruding part 3D is a disc-shaped protruding part which is positioned at the bottom end of the cylinder rod 3A and is radially arranged along the cylinder rod 3A.

The fit clearance between the lower end of the cylinder rod 3A and the bottom of the cylinder body 3B is larger than 1 mm.

The convex part 3D is embedded in the elastic plastic body 3C.

The elastoplastomer 3C is made of one or a combination of modified rubber, modified silica gel, gel material based on polyborosiloxane and modified asphalt. The modified rubber, the modified silica gel and the modified asphalt in the materials are all the prior art or the commercial products and can be obtained by adopting a method of outsourcing or self-preparation.

The top of the cylinder rod 3A is provided with a connecting part or a connector matched with the comb plate type telescopic device, and the connecting part or the connector adopts a screw port which is arranged at the top of the cylinder rod 3A and matched with the movable tooth plate 1 of the comb plate type telescopic device.

The top of the cylinder body 3B is provided with a cylinder cover 3E matched with the cylinder body, and the top of the cylinder rod 3A extends to the outside through an opening on the cylinder cover 3E.

The cylinder body 3B is cylindrical.

The concrete application of this embodiment in the fishback telescoping device is as follows:

the top end of a cylinder rod 3A of the solid viscous damper is fixedly assembled with the tail part of a movable toothed plate 1 of the comb plate type telescopic device, and a cylinder barrel 3B is arranged below the movable toothed plate 1 and fixed with embedded steel bars in a concrete structure on one side of a beam end gap 5.

An anchoring part 6 is fixed on the outer side of a cylinder barrel 3B of the solid viscous damper, the anchoring part 6 is fixed with embedded steel bars in a concrete structure on one side of a beam end gap 5, and the top end of a cylinder rod 3A is fastened with the tail part of the movable toothed plate 1 through bolts after penetrating. The upper end of the anchoring rod 4 is fixed with the lower surface of the fixed toothed plate 2, and the lower end of the anchoring rod 4 is fixed with the embedded steel bars in the concrete structure on the other side of the beam end gap 5.

As can be seen from fig. 6, after the settlement of the side beam, the movable toothed plate 1 is integrally lifted (as shown in fig. 6A) a when the vehicle passes through the movable toothed plate, the elastoplastic body 3C shows the elastic characteristic of the rigid body, the movable toothed plate 1 is lowered to a small extent and does not impact the concrete structure at the lower part of the movable toothed plate (as shown in fig. 6B), after the vehicle passes through the movable toothed plate, the elastoplastic body 3C shows the plastic characteristic of the plastic rigid body, so that the vibration and the noise can be reduced, and the movable toothed plate is slowly restored and driven to restore.

As can be seen from fig. 7, after the end of the one-side beam body rotates, the head of the movable toothed plate 1 rises (as shown in fig. 7A) a, when the vehicle passes through the movable toothed plate, the elastoplastic body 3C shows the elastic characteristic of the rigid body, the movable toothed plate 1 has a small descending amplitude and does not impact the concrete structure at the lower part of the movable toothed plate (as shown in fig. 6B), and after the vehicle passes through, the elastoplastic body 3C shows the plastic characteristic of the plastic rigid body, so that the vibration and noise can be reduced, and the movable toothed plate is slowly restored and driven to restore.