Encircling type constraint vibration reduction fastener

Abstract

The utility model discloses an embracing type constraint vibration reduction fastener, which relates to the field of rail traffic and comprises an insulation coupling base plate, an embracing type iron base plate, an under-plate vibration reduction pad, an upper iron base plate and an under-rail vibration reduction pad which are sequentially arranged from bottom to top, the embracing type iron base plate is of a closed frame structure, and a clamping structure is arranged at the top of the embracing type iron base plate. The under-plate anti-vibration pad and the upper iron base plate are arranged in a reserved groove of the surrounding type iron base plate from bottom to top, and the surrounding type iron base plate is matched with the upper iron base plate and the under-plate anti-vibration pad in a surrounding type comprehensive contact constraint mode. According to the encircling type constraint vibration reduction fastener, the matching precision between parts is improved, the transverse stability of the fastener is improved, a pre-assembly structure and an online detachable design are adopted, and the convenience of field installation and maintenance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail transit damping fastener technical field, especially relate to a kind of embracing type constraint damping fastener. BACKGROUND

[0002] China is in the era of high-speed development of rail transit construction, especially the rapid development of urban rail transit has greatly improved the convenience of people's daily life;In rail transit, whether it is underground line, or ground line, or elevated line, when the train travels through residential areas, hospitals, office areas and other areas, the impact of the wheel and rail will cause vibration, and the vibration will seriously affect the normal work and life of people nearby. Damping fastener is a kind of high damping and noise reduction rail fastener system. The fastener system clamps the rail through the elastic pad on both sides of the rail, so that the rail bottom is separated from the rail bearing system, and the rail is in a suspended state.

[0003] At present, the damping fastener in the rail transit industry adopts the structure of double-layer iron pad, and the constraint mode of the lower iron pad to the upper iron pad is generally local nested contact limiting, regional shoulder limiting and other forms. Due to the limited contact area or constraint range of the upper and lower iron pads, in addition, many traditional double-layer iron pad damping fasteners do not realize pre-assembly design, and the scattered parts are assembled on site, it is difficult to realize the close cooperation between each part, which leads to the insufficient limiting of the lower iron pad to the upper iron pad, and the upper iron pad is easy to move horizontally, rotate, and the local wear is serious. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the defects in the existing damping fastener technology, changing the cooperation form of upper and lower iron pads from traditional regional contact to embracing type overall contact constraint, improving the stability of the fastener, and realizing the pre-assembly of the fastener.

[0005] The utility model discloses a kind of embracing type restraint damping fastener, including by lower to upper sequentially arranged insulation coupling backing plate, embracing type iron backing plate, board underdamping pad, upper iron backing plate, rail underdamping pad, the embracing type iron backing plate is closed frame structure, and top is provided with clamping structure, the upper iron backing plate is set in embracing type iron backing plate reserved groove from lower to upper;The cooperation form of the upper iron backing plate, embracing type iron backing plate is embracing type overall contact restraint.The insulation coupling backing plate is provided with semi-closed clamping groove, the side wall of the embracing type iron backing plate is provided with the protruding structure of mutual clamping in corresponding clamping groove position, the cavity for placing upper iron backing plate, board underdamping pad is formed between the insulation coupling backing plate, embracing type iron backing plate;The purpose of fastener pre-assembly design is realized by the clamping buckle cooperation of insulation coupling backing plate and embracing type iron backing plate.The rail underdamping pad, board underdamping pad are non-uniform design of rigidity, wherein the rigidity and load of rail underdamping pad, board underdamping pad corresponding one end outside steel rail are greater than the rigidity and load of one end inside steel rail.The upper iron backing plate, embracing type iron backing plate are directly cooperated, the upper iron backing plate, embracing type iron backing plate and board underdamping pad are provided with the notch and boss of mutual cooperation in corresponding position, can avoid the situation that damping pad or fastener is placed reversely in fastener assembly or on-site construction process.

[0006] In order to further optimize the utility model, the following technical solutions can be preferred:

[0007] Preferably, the embracing type iron backing plate is provided with a reserved groove for placing the board underdamping pad, and the board underdamping pad is arranged below the upper iron backing plate. This greatly reduces the assembly height of the fastener, facilitates the in-situ replacement of the damping fastener with a common fastener, and improves the adaptability of the fastener.

[0008] Preferably, the total thickness of the board underdamping pad is slightly greater than the height from the lower surface of the upper iron backing plate to the lower surface of the embracing type iron backing plate in the normal assembly state. Thus, the pre-tightening of the board underdamping pad by the upper iron backing plate after the fastener is installed is realized, and the loosening of the fastener caused by the thinning of the board underdamping pad due to the compression permanent deformation can be avoided.

[0009] Preferably, the contact and cooperation area of the upper iron backing plate and the embracing type iron backing plate is provided with a reinforcing thickened portion. This increases the cooperation area of the two, and improves the limiting effect.

[0010] Preferably, the upper iron backing plate, the embracing type iron backing plate, the board underdamping pad, and the insulation coupling backing plate are pre-assembled and connected in the form of clamping buckle, and the upper iron backing plate and the embracing type iron backing plate are tightly cooperated in the form of tolerance, with a cooperation gap of 0.1-1 mm. This reduces the on-site construction process, improves the on-site construction efficiency, and realizes the tight cooperation between the parts of the fastener.

[0011] The utility model has the advantages that:

[0012] 1. The product provides a ring type restraint damping fastener. Its main structure mainly includes upper iron pad, ring type iron pad, rail under damping pad, plate under damping pad, insulation coupling pad, distance cover plate, elastic strip, insulation rail distance block and anchor bolt, etc. All parts can be disassembled and replaced. Among them, the upper iron pad, the ring type iron pad, the plate under damping pad and the insulation coupling pad are pre-assembled integrally by buckle form, which is convenient for on-site construction and installation. The fastener is simple to install and disassemble, without the need for complex or special tools, greatly improving the assembly efficiency of the fastener and the convenience of installation and maintenance. The fastener obtains low stiffness and high damping effect through double-layer damping pad structure and low pre-tightening installation form; and through the ring type restraint of the ring type iron pad on the upper iron pad, the ring type iron pad realizes the limiting of the upper iron pad in the horizontal direction and the vertical upward direction, effectively improving the horizontal stability and anti-dropping performance of the fastener; in addition, the fastener adopts the structure type of the plate under damping pad sleeved into the hollow reserved groove of the ring type iron pad, which greatly reduces the assembly height of the fastener, facilitates the in-situ replacement of the damping fastener and the ordinary fastener, and improves the adaptability of the fastener. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the overall structure schematic diagram of the damping fastener in example 1.

[0014] Figure 2 It is the split view of the damping fastener in example 1.

[0015] Figure 3 It is the sectional view of the damping fastener in example 1.

[0016] Figure 4 It is the split view of the damping fastener in example 1.

[0017] Figure 5 It is the split view of the damping fastener in example 1.

[0018] Figure 6 It is the top structure schematic diagram of the upper iron pad in example 1.

[0019] Figure 7 It is the bottom structure schematic diagram of the upper iron pad in example 1.

[0020] Figure 8 It is the top structure schematic diagram of the ring type iron pad in example 1.

[0021] Figure 9 It is the bottom structure schematic diagram of the ring type iron pad in example 1.

[0022] Figure 10 It is the perspective view of the rail under damping pad in example 1.

[0023] Figure 11is a sectional view of the rail under damping pad in Example 1;

[0024] Figure 12 is a perspective view of the plate under damping pad in Example 1;

[0025] Figure 13 is a top view of the plate under damping pad in Example 1;

[0026] Figure 14 is a perspective view of the insulation coupling pad in Example 1;

[0027] Figure 15 is a sectional view of the insulation coupling pad in Example 1;

[0028] In the figure: 1 - sleeper; 2 - insulation coupling pad; 3 - anchor bolt; 4 - ring type iron pad; 5 - plate under damping pad; 6 - upper iron pad; 7 - rail under damping pad; 8 - steel rail; 9 - elastic strip; 10 - notch one; 11 - limiting groove; 12 - limiting boss; 13 - reserved groove; 14 - notch two; 15 - protruding structure; 16 - clamping groove; 17 - boss. DETAILED DESCRIPTION

[0029] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary skilled in the art without creative labor belong to the scope of protection of the present application.

[0031] Example 1:

[0032] As Figures 1-15As shown: a ring type constraint damping fastener, including from bottom to top installed in turn insulation coupling pad 2, ring type iron pad 4, under the plate damping pad 5, upper iron pad 6, rail under the damping pad 7, spring strip 9, steel rail 8, wherein the rail under the damping pad is arranged directly below the steel rail, wherein the ring type iron pad 4 is provided with a reserved slot 13 for placing the under the plate damping pad, and the under the plate damping pad is installed below the upper iron pad; greatly reduce the assembly height of the fastener, facilitate the in situ replacement of the damping fastener and the ordinary fastener, and improve the adaptability of the fastener. The ring type iron pad 4 is a closed frame structure, and the top is provided with a clamping structure, and the specific clamping structure is that a limiting boss 12 is designed on the ring type iron pad 4, and a concave limiting groove 11 is designed on the top of the upper iron pad corresponding to the limiting boss, the upper iron pad is placed in the reserved slot of the ring type iron pad 4 from bottom to top, and the cooperation form of the upper iron pad 6 and the ring type iron pad 4 is ring type overall contact constraint; wherein the ring type iron pad 4 is installed on the sleeper 1 through the nylon sleeve pipe and the anchor bolt 3.

[0033] The total thickness of the under the plate damping pad 5 is slightly greater than the height from the lower surface of the upper iron pad to the lower surface of the ring type iron pad in the normal assembly state, so that the under the plate damping pad is pre-tightened by the upper iron pad after the fastener is installed, and the loosening of the fastener caused by the thickness thinning of the damping pad due to the compression permanent deformation can be avoided.

[0034] The insulation coupling pad 2 is designed with a semi-closed clamping groove 16, and the sidewall of the ring type iron pad is designed with a protruding structure 15 corresponding to the position of the clamping groove 16, and the insulation coupling pad and the ring type iron pad form a cavity for placing the upper iron pad and the under the plate damping pad, and the purpose of the pre-assembly design of the fastener is achieved through the clamping cooperation of the insulation coupling pad and the ring type iron pad.

[0035] The rail under the damping pad 7 and the under the plate damping pad 5 adopt non-uniform stiffness design, and the stiffness and load of the rail under the damping pad and the under the plate damping pad corresponding to one end of the outer side of the steel rail are greater than the stiffness and load of the other end of the inner side of the steel rail, which effectively improves the torsional stiffness of the fastener and enhances the lateral stiffness of the fastener.

[0036] The contact and cooperation area of the upper iron pad and the ring type iron pad is provided with a reinforced thickened part, the cooperation area of the two is increased, and the limiting effect is improved.

[0037] The upper iron pad and the ring type iron pad are directly cooperated, and the upper iron pad, the ring type iron pad and the under the plate damping pad are designed with a notch and a boss corresponding to each other at the corresponding positions, specifically, the upper iron pad and the ring type iron pad are respectively provided with notch one and notch two, and the under the plate damping pad is designed with a boss 17 matched with the notch one 10 and the notch two 14, which can avoid the situation that the damping pad or the fastener is placed in reverse during the assembly or on-site construction of the fastener.

[0038] The product design has the following characteristics:

[0039] 1. Ring type constraint design

[0040] The ring type iron base plate design is a closed frame structure, and the top is provided with a clamping structure, and the upper iron base plate is placed in the reserved groove of the ring type iron base plate from bottom to top; through the size matching design, precise machining control and other means, while ensuring that the upper iron base plate can be put into the reserved groove of the ring type iron base plate, the gap between the upper iron base plate and the ring type iron base plate is strictly controlled. The matching form of the upper iron base plate and the ring type iron base plate is ring type overall contact constraint.

[0041] 2. Pre-tightening force design

[0042] The under-plate damping pad is placed in the lower reserved groove (below the upper iron base plate), and the total thickness of the under-plate damping pad is slightly greater than the height from the lower surface of the upper iron base plate to the lower surface of the ring type iron base plate in the normal assembly state, so as to realize the pre-tightening of the upper iron base plate on the under-plate damping pad after the fastener is installed, and to avoid the fastener loosening caused by the thickness thinning of the damping pad due to compression permanent deformation.

[0043] 3. Pre-assembly design

[0044] The upper iron base plate and the under-plate damping pad are placed in the cavity between the ring type iron base plate and the insulation coupling pad, and the purpose of the fastener pre-assembly design is achieved through the buckle cooperation of the insulation coupling pad and the ring type iron base plate.

[0045] 4. High torsional resistance design

[0046] (1) The upper iron base plate and the ring type iron base plate are locally thickened in the matching area, the matching area of the two is increased, and the limiting effect is improved;

[0047] (2) The rail under-damping pad and the under-plate damping pad adopt non-uniform stiffness design with large load (outer side of the steel rail) and large stiffness, small load (inner side of the steel rail) and small stiffness, which effectively improves the torsional stiffness of the fastener and enhances the lateral stiffness of the fastener. And a notch or a boss is designed on the upper iron base plate, the ring type iron base plate and the under-plate damping pad respectively for cooperation, which can avoid the situation that the damping pad or the fastener is placed in reverse during the assembly or on-site construction of the fastener.

[0048] Finally, it should be pointed out that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A ring type restraint and damping fastener, comprising, from bottom to top, an insulating coupling pad plate, a ring type iron pad plate, a plate under damping pad, an upper iron pad plate, and a rail under damping pad; characterized in that: The ring type iron pad is a closed frame structure, and the top is provided with a clamping structure, the lower vibration pad and the upper iron pad are arranged in the reserved groove formed by the ring type iron pad from bottom to top, and the horizontal direction and the vertical upward direction of the lower vibration pad and the upper iron pad are constrained and limited by the ring type iron pad; the insulation coupling pad is provided with a semi-closed clamping groove, the side wall of the ring type iron pad is provided with a protruding structure corresponding to the clamping groove position, the insulation coupling pad, the ring type iron pad form a cavity for placing the upper iron pad and the lower vibration pad; the rail under the damping pad and the plate under the damping pad are designed with non-uniform rigidity, wherein the rigidity and load of the rail under the damping pad and the plate under the damping pad corresponding to the outer side of the rail are greater than the rigidity and load of the rail under the damping pad and the plate under the damping pad corresponding to the inner side of the rail; the upper iron pad and the ring type iron pad are directly matched, and the upper iron pad, the ring type iron pad and the plate under the damping pad are provided with corresponding notches and bosses.

2. A wrap-around restraining vibration damping fastener according to claim 1, wherein: The ring type iron pad is provided with a reserved groove for placing the plate under the damping pad, and the plate under the damping pad is arranged below the upper iron pad.

3. A wrap-around restraining vibration damping fastener according to claim 2, wherein: The total thickness of the plate under the damping pad is slightly greater than the height from the lower surface of the upper iron pad to the lower surface of the ring type iron pad in the normal assembly state.

4. A wrap-around restraining vibration damping fastener according to claim 1, wherein: The contact matching area of the upper iron pad and the ring type iron pad is provided with a reinforced thickening part.

5. A wraparound restraining vibration damping fastener according to claim 1, wherein: The upper iron pad, the ring type iron pad, the plate under the damping pad and the insulation coupling pad are connected by pre-assembly connection in the form of buckling, and the upper iron pad and the ring type iron pad are tightly matched by adopting a tolerance, and the matching gap is 0.1-1mm, so as to realize better limiting effect.

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