Novel bolt-free vibration and noise reduction comb tooth telescopic device

Abstract

The utility model belongs to the technical field of telescopic devices, and particularly relates to a novel bolt-free vibration and noise reduction comb tooth telescopic device. The comb tooth expansion device comprises a fixed comb tooth plate and a movable comb tooth plate which are arranged on the two sides of the expansion joint respectively, the movable comb tooth plate spans the expansion joint to be in comb tooth socket joint with the fixed comb tooth plate, a damping mechanism is arranged at the bottom of the fixed comb tooth plate and comprises a pressing plate and a supporting plate which are in socket joint through a protruding strip and a groove, and a disc spring corresponding to the protruding strip is arranged in the groove. A bottom plate is arranged at the bottom of the supporting plate; a rotating friction pair consisting of a cylindrical convex surface and a cylindrical groove is arranged between the bottom plate and the supporting plate; the comb tooth expansion device is assembled without bolts, realizes multidirectional displacement, can effectively absorb shock and reduce noise, and has the characteristics of compact structure, safety, durability and low maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of telescopic devices, specifically relating to a novel boltless vibration-damping and noise-reducing comb-tooth telescopic device. Background Technology

[0002] Bridge expansion joints are a crucial component of bridge structural safety, accommodating bridge displacement and ensuring vehicles pass smoothly and safely through the expansion joints. However, due to the highly complex and variable stress conditions and displacement mechanisms of these joints, they are among the most vulnerable components in bridge engineering, posing serious risks to bridge structure and traffic safety if damaged.

[0003] According to domestic and international statistics, more than half of the partial functional failures in bridge structures involve problems with expansion joints. Among the 13 types of auxiliary products in bridge engineering, expansion joints have the greatest impact on bridge structures. In Europe, the maintenance cost of expansion joints accounts for 8% to 20% of all bridge maintenance costs. Defects in expansion joints can also affect the overall function of the bridge, creating traffic safety hazards and indirect economic losses. Therefore, the problems of short service life, insufficient durability, and excessively high use and maintenance costs of bridge expansion joints are becoming increasingly prominent.

[0004] With the rapid development of my country's transportation industry, people have increasingly higher requirements for driving comfort, safety and reliability. While travel is convenient, it also brings the unavoidable problem of traffic noise pollution, especially for telescopic devices.

[0005] Currently, the most commonly used telescopic devices are modular telescopic devices and comb-plate telescopic devices. Comb-plate telescopic devices are further divided into ordinary comb-plate telescopic devices and multi-directional displacement comb-plate telescopic devices. Multi-directional displacement comb-plate telescopic devices, with their unique unit plate design and interlocking comb-shaped structure, are gaining an increasingly large market share. However, most ordinary comb-plate telescopic devices use bolts for anchoring, which commonly suffers from problems such as bolts being prone to loosening or stripping and falling off after repeated pulling forces, comb teeth detaching, and insufficient impact resistance. After the bolts fall off, the comb plates can easily fly off during driving, affecting driving safety and causing adverse social impacts and economic losses. Secondly, traditional comb-plate telescopic joint displacement devices are mostly made of steel shafts or rubber materials. Steel shaft structures have no shock absorption function, are noisy, have exposed structures, and are prone to rusting and becoming ineffective. Rubber materials are prone to aging and cracking, have large permanent compression deformation, large elastic loss, and insignificant shock absorption effect, and are prone to aging and failure.

[0006] Therefore, providing a multi-directional displacement comb plate telescopic device that avoids rubber materials, has a boltless structural connection, a simple and compact assembly structure, and can reduce vibration and noise is a problem that those skilled in the art expect to solve. Utility Model Content

[0007] The purpose of this utility model is to provide a novel boltless assembly structure comb telescopic device that can effectively reduce vibration and noise and has multi-directional displacement, and features a compact structure, safety and durability, and low maintenance cost.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A novel boltless vibration-damping and noise-reducing comb tooth telescopic device includes a fixed comb tooth plate and a movable comb tooth plate respectively disposed on both sides of an expansion joint. The movable comb tooth plate crosses the expansion joint and engages with the fixed comb tooth plate. The device is characterized in that: a damping mechanism is provided at the bottom of the fixed comb tooth plate, the damping mechanism including a pressure plate and a support plate connected by a protrusion and a groove, a disc spring corresponding to the protrusion is disposed in the groove, a base plate is disposed at the bottom of the support plate, and a rotating friction pair consisting of a cylindrical convex surface and a cylindrical groove is disposed between the base plate and the support plate.

[0010] Additional technical features constituting the above-mentioned novel boltless vibration reduction and noise reduction comb tooth telescopic device also include:

[0011] —The pressure plate and support plate of the damping mechanism and the cylindrical convex surface and cylindrical groove of the rotating friction pair are all arranged along the axial direction of the expansion joint;

[0012] —A noise reduction pad layer made of sound-absorbing material is provided at the bottom of the movable comb plate, the sound-absorbing material including acoustic foam, sound fiber board and / or slag wool;

[0013] —A stainless steel dustproof plate is provided at the bottom of the movable comb plate, the stainless steel dustproof plate spans the expansion joint, and the comb teeth of the fixed comb plate slide on the upper part of the stainless steel dustproof plate.

[0014] —A waterstop is provided at the lower part of the movable comb plate. The waterstop is laid along the axial direction of the expansion joint, and the two sides of the waterstop are installed on the concrete structure sidewall of the expansion joint installation groove.

[0015] —The bottom of the movable comb plate and the fixed comb plate are respectively connected to the concrete structure of the installation groove on both sides of the expansion joint through several vertical anchor plates. The vertical anchor plates are arranged along the axial direction of the expansion joint, and anchoring steel bars are welded to the outside of the vertical anchor plates.

[0016] — Both ends of the anchoring steel bar are welded to the outside of the vertical anchoring plate to form a closed lock. It is welded to the upper part of the portal steel bar for positioning, and the overlapping space is connected by welding the first transverse steel bar. The portal steel bar, the vertical anchoring plate, and the anchoring steel bar are assembled to form an anchoring module. The first transverse steel bar connects all the anchoring modules arranged along the expansion joint axis into one unit.

[0017] —The two lower ends of the portal steel bar have hooks, which are placed inside the expansion joint foundation. A second transverse steel bar is welded inside the hook, which connects the hooks of all the portal steel bars arranged along the expansion joint axis into one piece.

[0018] Compared with the prior art, the novel boltless vibration-damping and noise-reducing comb-tooth telescopic device provided by this utility model has the following advantages: Firstly, the bottom of the fixed comb plate of the telescopic device is equipped with a damping mechanism. This mechanism includes a pressure plate and a support plate connected by a convex strip and a groove. A disc spring corresponding to the convex strip is installed in the groove, which provides a buffering and shock-absorbing effect through the elastic deformation of the disc spring, improving the comfort of vehicles passing through the expansion joint, enhancing the impact resistance of the comb plate, and extending its service life. Secondly, a base plate is installed at the bottom of the support plate, and a rotating friction pair consisting of a cylindrical convex surface and a cylindrical groove is set between the base plate and the support plate. This allows the comb plates on both sides of the expansion joint to achieve vertical displacement, improving the shear resistance of the telescopic device. Compared with traditional steel shafts or rubber materials, this device combines an elastic damping structure with multiple displacements. This novel comb-tooth telescopic device adopts a boltless assembly structure, further enhancing the vibration-damping and noise-reducing effect and making it less prone to corrosion and aging. The overall structure is compact and enhances the durability of the comb-tooth telescopic device, offering advantages such as safe and stable operation, low usage and maintenance costs, and good economic benefits. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a novel boltless vibration reduction and noise reduction comb tooth telescopic device according to this utility model;

[0020] Figure 2 for Figure 1 Enlarged view of the part shown in the middle circle;

[0021] Figure 3 This is a top view of the device.

[0022] Figure 4 This is a three-dimensional structural diagram of the device. Detailed Implementation

[0023] The structure and working principle of the novel boltless vibration-damping and noise-reducing comb-tooth telescopic device provided by this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, the orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "set / equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figure 1 , Figure 2 As shown, the structure of this novel boltless vibration damping and noise reduction comb tooth telescopic device includes a fixed comb tooth plate 1 and a movable comb tooth plate 2 respectively set on both sides of the expansion joint a. The movable comb tooth plate 2 crosses the expansion joint a and is inserted into the fixed comb tooth plate 1. The bottom of the fixed comb tooth plate 1 is provided with a damping mechanism 3. The damping mechanism 3 includes a pressure plate 301 and a support plate 302 connected by a protrusion 31 and a groove 32. A disc spring 33 corresponding to the protrusion 31 is set in the groove 32. A base plate 303 is set at the bottom of the support plate 302. A rotating friction pair 4 composed of a cylindrical convex surface 41 and a cylindrical groove 42 is set between the base plate 303 and the support plate 302.

[0027] Its working principle is as follows: The movable comb plate 2 and the fixed comb plate 1 of the comb-tooth telescopic device are respectively installed in the beam end mounting grooves b on both sides of the bridge expansion joint a. A damping mechanism 3 is set between the bottom of the fixed comb plate 1 and the concrete structure c. It includes a pressure plate 301 and a support plate 302 connected by a protrusion 31 and a groove 32. A disc spring 33 corresponding to the protrusion 31 is set in the groove 32. Through the elastic deformation of the disc spring 33, the load impact of the comb-tooth telescopic area is buffered, and the durability of the telescopic device is enhanced. At the same time, a base plate 303 is set at the bottom of the support plate 302. A rotating friction pair 4 composed of a cylindrical protrusion 41 and a cylindrical groove 42 is set between the base plate 303 and the support plate 302, which realizes the vertical rotation relative to the comb plate, enhances the multi-directional displacement function of the telescopic device, further reduces vibration and noise, and improves the comfort of vehicle passage.

[0028] It should be noted that this new boltless comb tooth telescopic device uses welding connection instead of traditional bolt connection, which solves the problem that the traditional comb tooth plate is easy to loosen and fly out when bolt connection is used. The rotating friction pair 4 realizes the vertical rotation angle generated by the deflection of the beam, avoids the damage of the tooth under suspension and the occurrence of tooth warping, and improves the smoothness of driving.

[0029] In the structure constituting the above-mentioned novel boltless vibration reduction and noise reduction comb tooth telescopic device

[0030] --like Figure 3 As shown, the pressure plate 301, support plate 302 of the above-mentioned damping mechanism 3 and the cylindrical convex surface 41 and cylindrical groove 42 of the rotating friction pair 4 are all arranged along the axial direction of the expansion joint a. That is, the damping mechanism 3 is arranged along the axial direction of the expansion joint a and is laid along the bottom of the fixed comb plate 1. In this way, the damping force is uniform, the elastic buffer release is balanced, the load impact and vibration reduction and noise reduction effects are balanced, and the durability of the device is improved.

[0031] — Preferably, a noise reduction pad 5 made of sound-absorbing material is provided at the bottom of the above-mentioned movable comb plate 2. The sound-absorbing material includes acoustic foam, sound fiber board and / or slag wool. The pad 5 made of such material is laid along the expansion joint a. It can further absorb and reduce sound on the basis of the noise reduction of the comb structure, reduce the vibration noise generated by the vehicle passing by, avoid noise pollution, and is especially suitable for municipal roads and bridges.

[0032] — Preferably, a stainless steel dustproof plate 6 is provided at the bottom of the movable comb plate 2. The stainless steel dustproof plate 6 can be welded to the bottom of the movable comb plate 2 and simultaneously crosses the expansion joint a. The comb teeth of the fixed comb plate 1 slide on the upper part of the stainless steel dustproof plate 6. That is, the stainless steel dustproof plate 6 can cover the gap of the expansion joint a, prevent sand, dust and debris from entering the expansion device, avoid blockage in the expansion area, and ensure the normal expansion and contraction function of the expansion joint a.

[0033] —Furthermore, a waterstop 7 is provided at the lower part of the aforementioned movable comb plate 2. The waterstop 7 is laid along the axial direction of the expansion joint a. The two sides of the waterstop 7 are installed on the side wall of the concrete structure c of the expansion joint installation groove b. The waterstop 7 forms a through groove in the expansion joint a, which can both deform synchronously with the expansion and contraction and achieve the effect of water diversion and drainage.

[0034] --like Figure 4 As shown, the bottom of the movable comb plate 2 and the fixed comb plate 1 are respectively connected to the concrete structure c of the installation groove b on both sides of the expansion joint a through several vertical anchor plates 81. The vertical anchor plates 81 are arranged along the axial direction of the expansion joint a, and the outer side of the vertical anchor plates 81 is welded with anchor steel bars 82. That is, the comb plate and the concrete structure c in the beam end installation groove b are connected through a composite anchor unit. Compared with the traditional bolt anchoring method, this avoids problems such as easy loosening of bolts, easy flying out of the comb plate when driving after the bolt falls off, or stripping and falling off of the bolt after repeated pulling, comb tooth separation, and insufficient impact resistance and durability. This enhances the traffic safety performance of the comb expansion device.

[0035] —Furthermore, both ends of the aforementioned anchoring steel bar 82 are welded to the outside of the vertical anchoring plate 81 to form a closed interlock. It is welded to the upper part of the portal steel bar 83 for positioning, and the overlapping space is connected by welding the first transverse steel bar 91. That is, the portal steel bar 83, the vertical anchoring plate 81, and the anchoring steel bar 82 are assembled to form an anchoring module. The first transverse steel bar 91 connects all the anchoring modules arranged along the expansion joint a axis into a whole, which enhances the overall integration of the anchoring structure and improves the anchoring effect and the stability of use.

[0036] — Preferably, the two lower ends of the portal steel bar 83 have hooks 84, which are placed in the expansion joint foundation d (i.e., the bottom of the concrete structure of the installation groove). The hooks 84 are welded with a second transverse steel bar 92. The second transverse steel bar 92 connects the hooks 84 of all the portal steel bars 83 arranged along the expansion joint a axis into a whole, that is, it is combined with the first transverse steel bar 91 to form a double-layer three-dimensional anchoring structure, so that the expansion joint installation groove b and the beam end foundation d are more tightly connected, and the service durability of the expansion device is improved.

[0037] The above-described embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the implementation of this utility model. Therefore, any other modifications or equivalent substitutions to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A novel boltless vibration-damping and noise-reducing comb tooth telescopic device, comprising a fixed comb tooth plate and a movable comb tooth plate respectively disposed on both sides of an expansion joint, wherein the movable comb tooth plate crosses the expansion joint and engages with the fixed comb tooth plate for comb tooth insertion, characterized in that: The bottom of the fixed comb plate is provided with a damping mechanism, which includes a pressure plate and a support plate connected by a convex strip and a groove. A disc spring corresponding to the convex strip is provided in the groove. A base plate is provided at the bottom of the support plate. A rotating friction pair composed of a cylindrical convex surface and a cylindrical groove is provided between the base plate and the support plate.

2. The novel boltless vibration-damping and noise-reducing comb tooth telescopic device according to claim 1, characterized in that: The pressure plate and support plate of the damping mechanism, as well as the cylindrical convex surface and cylindrical groove of the rotating friction pair, are all arranged along the axial direction of the expansion joint.

3. A novel boltless vibration-damping and noise-reducing comb tooth telescopic device according to claim 1 or 2, characterized in that: A noise reduction pad layer made of sound-absorbing material is provided at the bottom of the movable comb plate, the sound-absorbing material including acoustic foam, sound fiber board and / or slag wool.

4. The novel boltless vibration damping and noise reduction comb tooth telescopic device according to claim 1, characterized in that: The bottom of the movable comb plate is provided with a stainless steel dustproof plate, which spans the expansion joint, and the comb teeth of the fixed comb plate slide on the upper part of the stainless steel dustproof plate.

5. A novel boltless vibration-damping and noise-reducing comb tooth telescopic device according to claim 1 or 4, characterized in that: A waterstop is provided at the lower part of the movable comb plate. The waterstop is laid along the axial direction of the expansion joint, and the two sides of the waterstop are installed on the concrete structural sidewall of the expansion joint installation groove.

6. The novel boltless vibration damping and noise reduction comb tooth telescopic device according to claim 1, characterized in that: The bottom of the movable comb plate and the fixed comb plate are respectively connected to the concrete structure of the installation groove on both sides of the expansion joint through several vertical anchor plates. The vertical anchor plates are arranged along the axial direction of the expansion joint, and anchoring steel bars are welded to the outer side of the vertical anchor plates.

7. A novel boltless vibration-damping and noise-reducing comb tooth telescopic device according to claim 6, characterized in that: Both ends of the anchoring steel bar are welded to the outer side of the vertical anchoring plate to form a closed interlock. It is welded to the upper part of the portal steel bar for positioning, and the overlapping space is connected by welding the first transverse steel bar.

8. A novel boltless vibration-damping and noise-reducing comb tooth telescopic device according to claim 7, characterized in that: The portal steel bar has hooks at both lower ends, and the hooks are placed at the base of the expansion joint.

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