CN219690204U - Higher vibration reduction fastener system - Google Patents

Abstract

The utility model provides a higher vibration damping fastener system which comprises a rail lower base plate, a preassembly body and a bottom base plate which are sequentially arranged from top to bottom, wherein the preassembly body comprises an upper base plate, an elastic unit and a lower base plate which are sequentially arranged from top to bottom, the elastic unit comprises at least two layers of elastic pads, the upper base plate is detachably connected with the lower base plate, the lower base plate is provided with a second through hole, the inner wall of the second through hole is provided with a limiting boss, the lower surface of the elastic unit is provided with a limiting clamping groove, and the limiting clamping groove is clamped with the limiting boss. The high-order vibration damping fastener system has good low vertical rigidity elastic effect, achieves the high-order vibration damping function, and meanwhile preassembles key components in the high-order vibration damping fastener system into a whole, is convenient to transport and construct, and is beneficial to improving the later track construction efficiency and maintenance efficiency.

Description

Higher vibration reduction fastener system

Technical Field

The utility model relates to the technical field of rail transit, in particular to a high-grade vibration reduction fastener system.

Background

When the urban rail transit train runs, the wheel rail vibration is transmitted to the ground building through the soil layer, so that the ground building structure vibration and secondary noise are caused, and the life production quality of people is affected. With the increasing importance of society on vibration reduction and noise reduction, the demand of the rail market on higher vibration reduction measures is increasing, and urban rail transit always has higher requirements on the aspects of construction cost, engineering applicability, construction maintenance cost, efficiency and the like while considering the vibration reduction effect of the vibration reduction measures. The double-layer vibration damping fastener which is most commonly used in the track vibration damping and noise reducing market at present belongs to a medium vibration damping product, and can not meet the higher vibration damping requirement (8-10 dB) required by people due to the self structural characteristic requirement.

In the prior art, urban rail transit adopts high-level vibration reduction measures with various forms, and mainly adopts ballast bed vibration reduction measures and fastener vibration reduction measures. The high-order vibration reduction measures of the ballast bed mainly pass through the low-rigidity elastic layer paved under the ballast bed plate, so that good vibration reduction and isolation effects are realized, the vibration-taking quality is high, the vibration reduction effect is good, but the manufacturing cost is high, the construction period is long, the maintenance and replacement are difficult, the engineering applicability is poor, and the use is limited. The higher damping measures of the fasteners are mainly suspension type higher damping fasteners, the rail is supported by the rail web, higher damping is achieved by utilizing the shearing deformation of rubber wedge blocks at two sides, but the installation maintenance tool and parts and the common line fasteners are not universal, so that the installation maintenance is inconvenient, the rail suspension supporting mode is from the visual observation perspective, the safety cannot be guaranteed when the rail breakage occurs, and therefore, the acceptance degree in the market is lower.

In particular, the lower the vertical stiffness of the fastener system, the better the vibration reduction and isolation effect. In order to ensure the deformation safety of the elastic strip, the rigidity of the elastic layer below the rail is usually more than 40kN/mm, and the rigidity value of the middle elastic layer cannot be always reduced (the middle layer is easily deformed too much due to too low rigidity, so that the aging fatigue is accelerated, and the service life is shortened) so as to ensure the service life, thus the high vibration damping requirement cannot be met. The prior mature high-grade vibration damping fasteners at home and abroad are mainly pioneer fasteners (WO 2005009817) of UK Pan Delu company and floating rail fasteners (201110351159.4) of Luoyang double-rayleigh rubber and plastic, which are both rail support rails from rail waists and realize low vertical rigidity by utilizing shearing deformation of rubber wedge blocks at two sides, but parts and installation maintenance tools required by the fasteners are not universal with common fasteners, are required to be specially equipped, are troublesome to install and maintain, and have low market acceptance.

Compared with the ballast bed type higher vibration reduction measures, the fastener type higher vibration reduction measures have obvious advantages in the aspects of construction cost, construction efficiency, installation maintenance and the like, but the existing fastener type higher vibration reduction measures are mainly suspension type higher vibration reduction fasteners, and have the problems of incapable preassembly, high construction maintenance cost, low installation efficiency, low universality of parts and the like.

Disclosure of Invention

In view of the foregoing, the present utility model aims to provide a higher vibration damping fastener system, so as to solve the problems of unable pre-assembly, low construction maintenance efficiency and the like of the higher vibration damping fastener in the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a higher damping fastener system, includes rail lower bolster, the preassembly body, the bottom backing plate that set gradually from top to bottom, the preassembly body includes upper portion backing plate, elastic element, the lower part backing plate that sets gradually from top to bottom, the elastic element includes two-layer at least elastic pad, upper portion backing plate is connected with the mode that can dismantle with the lower part backing plate, the lower part backing plate sets up the second through-hole, the inner wall of second through-hole sets up spacing boss, the lower surface of elastic element sets up spacing draw-in groove, spacing draw-in groove and spacing boss joint.

Further, the elastic unit comprises a first elastic pad, a middle backing plate and a second elastic pad which are sequentially arranged from top to bottom, and the middle backing plate is respectively clamped with the first elastic pad and the second elastic pad.

Further, the first elastic pad is provided with a first limit hole, the second elastic pad is provided with a second limit hole, and both sides of the middle backing plate are provided with limit tables; the first limiting hole is clamped with the limiting table between the first elastic pad and the middle pad, and the second limiting hole is clamped with the limiting table between the middle pad and the second elastic pad.

Further, a limiting clamping groove is formed in the lower surface of the second elastic pad, and a pre-tightening boss is arranged on the upper surface of the second elastic pad at a position opposite to the limiting clamping groove.

Further, the outer fringe of second elastic pad sets up the shirt rim, the shirt rim upwards extends, enclose between second elastic pad and the shirt rim and hold the chamber, the middle backing plate is set up in holding the chamber.

Further, the preassembly body comprises a stop block, the upper base plate is provided with a transverse stop shoulder, the lower base plate is correspondingly provided with a limit stop shoulder, the stop block is arranged between the transverse stop shoulder and the limit stop shoulder, a first limit surface of the stop block is in butt joint with the limit stop shoulder, and a second limit surface of the stop block is in butt joint with the transverse stop shoulder.

Further, the abutting surface of the limiting stop shoulder is provided with a limiting block, the first limiting surface is provided with a corresponding limiting groove, and the limiting block is clamped with the limiting groove.

Further, the preassembly body comprises a blocking sleeve, a first boss is arranged on one side, facing the upper base plate, of the lower base plate, a first through hole is correspondingly formed in the upper base plate, and one end, far away from the lower base plate, of the first boss penetrates through the first through hole and is connected with the blocking sleeve in a clamping mode.

Further, the retaining sleeve is provided with an assembly hole, a clamping tongue is arranged on the inner wall of the assembly hole, the retaining sleeve is positioned between the outer wall of the first boss and the inner wall of the first through hole, a clamping groove is formed in the first boss, and the clamping tongue is clamped with the clamping groove.

Further, a flange is arranged on the outer edge of the baffle sleeve, and the flange is pressed against the upper surface of the upper backing plate.

Compared with the prior art, the higher vibration reduction fastener system has the following advantages:

according to the higher vibration damping fastener system, the preassembly body is arranged, before the higher vibration damping fastener system is subjected to formal installation construction, the elastic units can be preassembled, then the upper base plate, the elastic units and the lower base plate are preassembled to form the preassembly body, and then the installation construction is performed in the track system. The key components in the high-order vibration damping fastener system are preassembled into a whole, so that the high-order vibration damping fastener system is convenient to transport and construct, and is beneficial to improving the later track construction efficiency and maintenance efficiency. On the basis, the installation maintenance tool and other parts of the high-order vibration reduction fastener system are consistent with the conventional fasteners in the prior art, and the installation maintenance efficiency can be further improved by adopting a general design mode, so that the installation maintenance cost of the fastener system is reduced.

In addition, on the basis of arranging the multi-layer backing plate, the utility model further arranges the composite elastic unit, so that the whole high-level vibration damping fastener system has a low vertical rigidity elastic effect, ensures reasonable loading strain of each elastic pad and backing plate while realizing the high-level vibration damping function, and is also beneficial to prolonging the service life of the high-level vibration damping fastener system.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is an exploded view of a higher vibration damping fastener system according to an embodiment of the present utility model in an assembled state in a rail transit system;

FIG. 2 is a partial cross-sectional view of a higher vibration damping fastener system according to an embodiment of the present utility model in an assembled state in a rail transit system;

FIG. 3 is a schematic illustration (including an isometric view, an exploded view) of a preassembly of a higher vibration damping fastener system according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the upper plate of a higher vibration damping fastener system according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a lower pad of a higher vibration damping fastener system according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a block of a higher vibration damping fastener system according to an embodiment of the present utility model (including axial side, lateral views);

FIG. 7 is a schematic view (including an axial side view and a cross-sectional view) of a collar of a higher vibration damping fastener system according to an embodiment of the present utility model;

FIG. 8 is an exploded view of an elastic unit of a higher vibration damping fastener system according to an embodiment of the present utility model;

FIG. 9 is a schematic view of a first resilient pad of a higher vibration damping fastener system according to an embodiment of the present utility model;

FIG. 10 is a schematic view of an intermediate pad of a higher vibration damping fastener system according to an embodiment of the present utility model (including views from two perspectives);

fig. 11 is a schematic structural view of a second elastic pad of a higher vibration damping fastener system according to an embodiment of the present utility model (including front and back view).

Reference numerals illustrate:

1. a steel rail; 2. spring strips; 3. an anchor bolt; 4. a flat gasket; 5. re-flicking; 6. a cover plate; 7. a rail pad; 8. a blocking sleeve; 81. a fitting hole; 82. a clamping tongue; 83. a flange; 9. an upper pad; 91. a first through hole; 92. a transverse shoulder; 10. a stop block; 101. a first limiting surface; 102. the second limiting surface; 103. a limit groove; 11. a first elastic pad; 111. a first limiting hole; 12. an intermediate backing plate; 121. a limiting table; 13. a second elastic pad; 131. a second limiting hole; 132. pre-tightening the boss; 133. a skirt edge; 134. a limit clamping groove; 14. a lower backing plate; 141. a second through hole; 142. a limit boss; 143. limiting stop shoulders; 144. a limiting block; 145. a first boss; 146. a clamping groove; 15. a bottom backing plate.

Detailed Description

The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the substance of their work to others skilled in the art. These inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. In order to avoid unclear direction, the steel rail 1 is "up" and the bottom pad 15 is "down" in the present utility model, and this is referred to as the direction in the present utility model, and this direction is consistent with the conventional fastener system assembly situation and will not be repeated.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

In the prior art, the high vibration reduction measures of the fasteners are usually suspension type high vibration reduction fasteners, the steel rail is supported from the rail web, high vibration reduction is realized by utilizing the shearing deformation of rubber wedge blocks at two sides, but the installation maintenance tool and parts and the common line fasteners are not universal, so that the installation maintenance is inconvenient, the supporting mode of the steel rail suspension is from the visual inspection perspective, the safety cannot be ensured when the rail breakage condition occurs, and therefore, the acceptance degree in the market is lower. Meanwhile, the existing suspension type high-grade vibration damping fastener also has the problems of incapable preassembly, high construction maintenance cost, low installation efficiency, low universality of parts and the like.

In order to solve the problems of incapable pre-assembly, low construction maintenance efficiency and the like of the higher vibration damping fasteners in the prior art, the embodiment provides a higher vibration damping fastener system, as shown in fig. 1-11, which comprises a rail lower base plate 7, a pre-assembly body and a bottom base plate 15 which are sequentially arranged from top to bottom; the steel rail 1 is arranged above the rail lower backing plate 7, the higher vibration reduction fastener system is fixed with the steel rail 1 through conventional components such as the elastic strip 2, meanwhile, the higher vibration reduction fastener system is connected with the sleeper through the anchor bolt 3, in view of the fact that the fastening mode of the fastener to the steel rail through the elastic strip is common, the fastening mode of the fastener to the sleeper through the bolt is correspondingly disclosed in the prior art, and the utility model is not repeated. The utility model mainly focuses on technical content related to preassembly in a high-grade vibration-damping fastener system.

The preassembly comprises an upper base plate 9, an elastic unit and a lower base plate 14 which are sequentially arranged from top to bottom, wherein the elastic unit comprises at least two layers of elastic pads, the upper base plate 9 and the lower base plate 14 are connected in a detachable mode, the elastic unit is connected with the lower base plate 14 in a clamping mode, specifically, the lower base plate 14 is provided with a second through hole 141, the inner wall of the second through hole 141 is provided with a limiting boss 142, the lower surface of the elastic unit is provided with a limiting clamping groove 134, and the limiting clamping groove 134 is clamped with the limiting boss 142 to realize the assembly of the elastic unit between the upper base plate 9 and the lower base plate 14.

Therefore, the utility model can pre-assemble the elastic unit before the main installation construction of the high-level vibration-damping fastener system, then pre-assemble the upper backing plate 9, the elastic unit and the lower backing plate 14 to form a pre-assembly, and then install the high-level vibration-damping fastener system in the track system. The key components in the high-order vibration damping fastener system are preassembled into a whole, so that the high-order vibration damping fastener system is convenient to transport and construct, and is beneficial to improving the later track construction efficiency and maintenance efficiency. On the basis, the installation maintenance tool and other parts (such as a track gauge block, a nylon sleeve and the like) of the high-order vibration damping fastener system are consistent with the conventional fasteners in the prior art, and the installation maintenance efficiency can be further improved by adopting a general design mode, so that the installation maintenance cost of the fastener system is reduced.

In addition, on the basis of arranging the multi-layer backing plate, the utility model further arranges the composite elastic unit, so that the whole high-level vibration damping fastener system has a low vertical rigidity elastic effect, ensures reasonable loading strain of each elastic pad and backing plate while realizing the high-level vibration damping function, and is also beneficial to prolonging the service life of the high-level vibration damping fastener system.

The elastic unit comprises a first elastic pad 11, a middle pad 12 and a second elastic pad 13 which are sequentially arranged from top to bottom, and the middle pad 12 is respectively clamped with the first elastic pad 11 and the second elastic pad 13. Specifically, the first elastic pad 11 is provided with a first limiting hole 111, the second elastic pad 13 is provided with a second limiting hole 131, and both sides of the middle pad 12 are provided with limiting tables 121; the first limiting hole 111 is clamped with the limiting table 121 between the first elastic pad 11 and the middle pad 12, and the second limiting hole 131 is clamped with the limiting table 121 between the middle pad 12 and the second elastic pad 13. Therefore, the elastic unit is also arranged as a preassembled piece which can be simply and conveniently disassembled, so that the preassembling operation of the preassembled body is facilitated, and the preassembling efficiency of the preassembled body is improved; correspondingly, in the subsequent installation maintenance process of the higher vibration reduction fastener system, the later track construction maintenance operation is also facilitated, and the installation maintenance efficiency of the track system is further improved.

In the elastic unit, the second elastic pad 13 is used as a component closer to the bottom (the lower pad 14), and the limiting clamping groove 134 is arranged on one side of the second elastic pad 13 away from the first elastic pad 11, so that after the elastic unit is preassembled, the limiting clamping groove 134 clamps the limiting bosses 142 of the second elastic pad 13 and the lower pad 14, and preassembling of the elastic unit and the lower pad 14 can be simply and conveniently realized. On the basis that the limit clamping groove 134 is formed in one side face of the second elastic pad 13, the pre-tightening boss 132 is arranged on the other side face of the second elastic pad 13 at a position opposite to the limit clamping groove 134, and when the pre-assembly body and the higher vibration damping fastener system are assembled, the pre-tightening boss 132 is arranged to enable the elastic unit and the pre-assembly body to have a certain interference magnitude, and a certain pre-tightening effect is formed along with slight deformation in the elastic unit, so that the pre-assembly firmness of the pre-assembly body and the assembly firmness of the higher vibration damping fastener system are improved.

For the second through hole 141 of the lower pad 14, with the thickness of the lower pad 14 and the height position of the limiting boss 142 being set appropriately, the second through hole 141 can accommodate the second elastic pad 13, which is beneficial to reducing the overall height of the fastener system.

The outer edge of the second elastic pad 13 is provided with a skirt edge 133, the skirt edge 133 extends upwards (or is called as extending towards the position where the steel rail 1 is located in the vertical direction), so that a containing cavity is defined between the second elastic pad 13 and the skirt edge 133, and the middle base plate 12 is arranged in the containing cavity; the provision of the skirt 133 thus provides complete isolation of the intermediate pad 12 from the lower pad 14, preventing the fastener system from "direct interference" of the intermediate pad 12 with the lower pad 14 when loaded.

For the connection between the upper pad 9 and the lower pad 14, the preassembly comprises a stop 10, one side of the stop 10 is denoted as a first limit surface 101, the opposite side is denoted as a second limit surface 102, and the first limit surface 101 is provided with a limit groove 103; the two ends of the upper backing plate 9 are provided with transverse retaining shoulders 92, the two ends of the lower backing plate 14 are correspondingly provided with limiting retaining shoulders 143, for the adjacent transverse retaining shoulders 92 and limiting retaining shoulders 143, the stop block 10 is arranged between the transverse retaining shoulders 92 and the limiting retaining shoulders 143, the first limiting surface 101 of the stop block 10 is abutted with the limiting retaining shoulders 143, and the second limiting surface 102 of the stop block 10 is abutted with the transverse retaining shoulders 92, so that the transverse limiting of the fastener system is realized.

In addition, the limiting shoulder 143 is provided with a limiting block 144 on the abutting surface abutting against the first limiting surface 101, the first limiting surface 101 is provided with a corresponding limiting groove 103, the limiting block 144 is clamped with the limiting groove 103, and the limiting shoulder 143 and the stop block 10 are transversely limited and simultaneously limited to a certain extent in the longitudinal direction (rail extending direction), so that the assembly firmness between the lower base plate 14 and the stop block 10 is improved.

Therefore, in the utility model, the relative arrangement of the upper backing plate 9, the lower backing plate 14 and the stop block 10 can improve the transverse stability of the fastener system, reduce the transverse displacement of the rail head caused by low vertical rigidity, strengthen the track gauge holding capability of the fastener system and effectively improve the use safety of the fastener system product.

The preassembly further comprises a retaining sleeve 8, a first boss 145 is arranged on one side, facing the upper backing plate 9, of the lower backing plate 14, a first through hole 91 is correspondingly arranged on the upper backing plate 9, and after the preassembly is preassembled, one end, far away from the lower backing plate 14, of the first boss 145 penetrates through the first through hole 91 and is clamped with the retaining sleeve 8.

Specifically, the retaining sleeve 8 has an assembly hole 81, the inner wall of the assembly hole 81 is provided with a clamping tongue 82, the outer edge of the retaining sleeve 8 is provided with a flange 83, after the preassembly body is preassembled, the first boss 145 penetrates into the assembly hole 81 of the retaining sleeve 8, the retaining sleeve 8 is located between the outer wall of the first boss 145 and the inner wall of the first through hole 91, the first boss 145 is provided with a clamping groove 146, the clamping tongue 82 is clamped with the clamping groove 146, and the largest dimension of the cross section of the flange 83 in the horizontal direction is larger than the aperture (diameter) of the first through hole 91, so that the flange 83 cannot enter the first through hole 91, namely, the flange 83 is pressed against the upper surface of the upper base plate 9. Therefore, the blocking sleeve 8 is clamped and locked with the first boss 145, so that the whole preassembly firmness of the preassembly is ensured.

In the present utility model, not only for the higher vibration-damping fastener, but also for any fastener system, the higher vibration-damping fastener system described in this embodiment may be used, and on the basis of the related structure and the assembly relationship of the higher vibration-damping fastener system provided in this embodiment, the higher vibration-damping fastener system further includes conventional fastener system components including the spring strip 2, the anchor bolt 3, the flat washer 4, the re-spring 5, the cover plate 6, etc., and in view of the structure and the assembly of the conventional fastener system components, the description thereof will be omitted herein.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. The utility model provides a higher damping fastener system, its characterized in that, higher damping fastener system includes rail lower bolster (7), the preassembly body, bottom backing plate (15) that set gradually from last to down, the preassembly body includes upper portion backing plate (9), elastic element, lower part backing plate (14) that set gradually from last to down, elastic element includes two-layer at least elastic pad, upper portion backing plate (9) are connected with lower part backing plate (14) in order to dismantle the mode, lower part backing plate (14) set up second through-hole (141), the inner wall of second through-hole (141) sets up spacing boss (142), the lower surface of elastic element sets up spacing draw-in groove (134), spacing draw-in groove (134) and spacing boss (142) joint.

2. The higher vibration damping fastener system according to claim 1, wherein the elastic unit comprises a first elastic pad (11), a middle pad (12) and a second elastic pad (13) which are sequentially arranged from top to bottom, and the middle pad (12) is respectively clamped with the first elastic pad (11) and the second elastic pad (13).

3. A higher vibration damping fastener system according to claim 2, characterized in that the first elastic pad (11) is provided with a first limiting hole (111), the second elastic pad (13) is provided with a second limiting hole (131), and both sides of the middle backing plate (12) are provided with limiting tables (121); the first limiting hole (111) is clamped with the limiting table (121) between the first elastic pad (11) and the middle pad (12), and the second limiting hole (131) is clamped with the limiting table (121) between the middle pad (12) and the second elastic pad (13).

4. The higher vibration damping fastener system according to claim 2, wherein the lower surface of the second elastic pad (13) is provided with a limit clamping groove (134), and the upper surface of the second elastic pad (13) is provided with a pre-tightening boss (132) at a position opposite to the limit clamping groove (134).

5. A higher vibration damping fastener system according to claim 2, characterized in that the outer edge of the second elastic pad (13) is provided with a skirt (133), the skirt (133) extends upward, a receiving cavity is defined between the second elastic pad (13) and the skirt (133), and the intermediate pad (12) is provided in the receiving cavity.

6. The high-level vibration damping fastener system according to claim 1, wherein the preassembly comprises a stop block (10), the upper base plate (9) is provided with a transverse stop shoulder (92), the lower base plate (14) is correspondingly provided with a limiting stop shoulder (143), the stop block (10) is arranged between the transverse stop shoulder (92) and the limiting stop shoulder (143), a first limiting surface (101) of the stop block (10) is abutted with the limiting stop shoulder (143), and a second limiting surface (102) of the stop block (10) is abutted with the transverse stop shoulder (92).

7. The higher vibration damping fastener system according to claim 6, wherein the abutment surface of the limiting stop shoulder (143) is provided with a limiting block (144), the first limiting surface (101) is provided with a corresponding limiting groove (103), and the limiting block (144) is clamped with the limiting groove (103).

8. The higher vibration damping fastener system according to claim 1, wherein the preassembly comprises a retainer (8), the lower backing plate (14) is provided with a first boss (145) towards one side of the upper backing plate (9), the upper backing plate (9) is correspondingly provided with a first through hole (91), and one end of the first boss (145) away from the lower backing plate (14) penetrates through the first through hole (91) and is clamped with the retainer (8).

9. A higher vibration damping fastener system according to claim 8, characterized in that the outer edge of the collar (8) is provided with a flange (83), said flange (83) pressing against the upper surface of the upper backing plate (9).

10. The higher vibration damping fastener system according to claim 8, wherein the retaining sleeve (8) is provided with an assembly hole (81), a clamping tongue (82) is arranged on the inner wall of the assembly hole (81), the retaining sleeve (8) is located between the outer wall of the first boss (145) and the inner wall of the first through hole (91), the first boss (145) is provided with a clamping groove (146), and the clamping tongue (82) is clamped with the clamping groove (146).