CN210561491U

CN210561491U - Fastener system suitable for subway

Info

Publication number: CN210561491U
Application number: CN201920852588.1U
Authority: CN
Inventors: 马红超; 喻琦
Original assignee: Wuhan Kunneng Track System Technology Co ltd
Current assignee: Wuhan Kunneng Track System Technology Co ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-05-19
Anticipated expiration: 2029-06-06

Abstract

The utility model discloses a fastener system suitable for subway belongs to the relevant technical field of subway, and it sets up elastic backing plate, iron tie plate and eccentric composite bush through corresponding, combines subassembly such as bullet strip, insulating gauge block, coupling assembling, utilizes the combination of above-mentioned each structure to match, can effectively realize the setting of subway rail on the sleeper, improves the performance that the fastener system resisted the transverse force greatly to can realize the gauge adjustment to a certain extent. The utility model discloses a fastener system suitable for subway, its simple structure sets up portably, and the strong reliability can effectively realize setting up and the gauge adjustment of certain extent of subway rail on the sleeper, and the performance that fastener system resisted the transverse force is stronger, can effectively avoid connecting bolt's inefficacy, promotes connecting bolt's life, reduces the maintenance cost of maintenance among the subway operation process, has better application prospect and spreading value.

Description

Fastener system suitable for subway

Technical Field

The utility model belongs to the technical field of the subway is relevant, concretely relates to fastener system suitable for subway.

Background

The subway is a rail transit form which is widely applied and plays an important role in the transportation of a plurality of cities. In the design and operation process of subway rail transit, the vibration and noise problems generated by subway traffic are not negligible, and the requirements of national environmental noise standards and environmental vibration standards must be met, which also puts higher requirements on the work of design and research personnel.

At present, rail vibration reduction measures aiming at urban rail traffic engineering mainly comprise three major types, namely fastener vibration reduction, sleeper vibration reduction and ballast bed vibration reduction. Compared with the damping mode, the damping of the fastener has the characteristics of convenience in replacement and easiness in implementation, and is mainly realized by increasing the elastic performance of the fastener system. However, in general, the elasticity of the fastener system cannot be too large, otherwise, the dynamic displacement of the steel rail is large, and further, other diseases are caused, and the normal setting and operation of the steel rail are affected. Therefore, the damping of the existing fasteners is mostly a medium damping measure, i.e. the elasticity of the fastener system is not too small or not too large.

In the prior art, the damping fastener that adopts to the subway mainly includes double-deck iron tie plate damping fastener and track bumper shock absorber fastener. The rail damper fastener is mainly characterized in that an iron base plate and a damping element (usually rubber) are vulcanized together, the rubber is utilized to damp through shearing performance, a certain damping effect can be achieved, the rail damper fastener is obvious in defect, not only is the height (about 85mm) of the fastener structure far higher than that of an ordinary fastener, the fastener structure is difficult to exchange with the ordinary fastener, but also rubber is easy to age, the damping effect is seriously attenuated, if the damping element needs to be replaced, the iron base plate needs to be integrally replaced, and the maintenance cost after the rail damper fastener is arranged is high. Double-deck iron tie plate damping fastener is another kind of fastener damping form, and it often is provided with the iron tie plate respectively in the upper and lower both sides of elastic backing plate, for example the double-deck non-linear damping fastener of non-friction type that discloses in current patent CN 109235163A, through the setting of double-deck iron tie plate, can promote the damping effect of fastener system to a certain extent, but also brought many defects simultaneously, for example: the setting of double-deck iron tie plate for the setting cost of fastener system is higher, not environmental protection, uneconomic, and the setting of double-deck iron tie plate, will probably cause the structure height of fastener system great, the effect of 20mm higher than ordinary fastener generally, not only can bring great inconvenience for the design and construction like this, still can increase anchor bolt's length by a wide margin, and anchor bolt is except being used for fixed fastener system, still need to resist the horizontal force that produces during the train operation, the longer the length of bolt, the shearing ability of bolt is worse, the cracked condition of bolt very easily appears, especially at little curve radius and increase the state. In addition, the setting of double-deck iron tie plate is toward still setting up locking structure toward going back to correspond, and its structure is complicated, and easy not hard up or the card hinders, and the reliability of device is poor, and the dismantlement difficulty after the inefficacy brings very big inconvenience for the maintenance work of fastener system.

SUMMERY OF THE UTILITY MODEL

To the above defect of prior art or improve in the demand one or more, the utility model provides a fastener system suitable for subway, wherein set up elastic backing plate, iron tie plate and eccentric composite bush through corresponding, combine the bullet strip, insulating gauge block, subassembly such as coupling assembling, can effectively realize the setting of subway rail on the sleeper, utilize the setting of eccentric composite bush can effectively promote connecting bolt to resist the performance of transverse force to satisfy the rail gauge adjustment in the certain limit, realize the stable setting of subway rail on the sleeper.

In order to achieve the purpose, the utility model provides a fastener system suitable for subway, including can be in the elastic backing plate and the iron backing plate of the range upon range of setting above the sleeper, and can fix above-mentioned two backing plates at the coupling assembling on the sleeper, characterized by, still include the eccentric composite bush that corresponds the setting of coupling assembling;

the eccentric composite bushing comprises a cylindrical bushing body and an end cap in a circular plate-shaped structure, wherein the end cap is coaxially arranged on one side end face of the bushing body, and is axially provided with a through hole, namely a bolt connecting hole, penetrating through the bushing body and the end cap, so that a connecting bolt in the connecting component can correspondingly penetrate through the through hole; the bolt connecting hole and the sleeve body are eccentrically arranged, and the axes of the bolt connecting hole and the sleeve body are parallel to each other and are spaced at a certain distance; a plurality of circular-arc-shaped notches which penetrate through two end faces of the end cap are arranged on the periphery of the end cap at intervals, namely limiting notches, and the distance between each limiting notch and the axis of the bolt connecting hole is unequal;

the iron base plate is of a plate-shaped structure, two ends of the iron base plate along the transverse direction are respectively provided with connecting holes penetrating through two end faces corresponding to the eccentric composite bushings, and the inner diameter of each connecting hole is larger than the outer diameter of the sleeve body and smaller than the outer diameter of the end cap; the two connecting holes are arranged along the diagonal line, and limiting columns are respectively arranged on one side of the two connecting holes along the transverse direction, the limiting columns are arranged corresponding to the limiting notches and arranged on the top surface of the iron base plate, and the eccentric composite bushing can be embedded into the corresponding limiting notches after being matched with the connecting holes; correspondingly, one of the two limiting columns is arranged on one side, away from the other connecting hole, of the corresponding connecting hole, and the transverse distance between the two limiting columns is equal to the transverse distance between the axes of the two connecting holes;

the elastic base plate can be arranged below the iron base plate, two ends of the elastic base plate are respectively provided with connecting through holes corresponding to the two connecting holes, and the connecting through holes can be coaxially aligned with the corresponding connecting holes after the iron base plate and the elastic base plate are correspondingly arranged; and the length of the sleeve body is greater than that of the connecting hole and less than the sum of the lengths of the connecting hole and the connecting through hole.

As a further improvement, the inner peripheral wall surface of the bolt connecting hole is fixedly provided with a buffer layer with a certain thickness along the hoop direction.

As a further improvement of the utility model, the device also comprises an elastic strip and an insulating gauge block which are arranged in pairs, and elastic strip connecting parts are respectively arranged on the two transverse ends of the iron backing plate corresponding to the elastic strip;

and the elastic strip connecting parts are arranged along diagonal lines and are respectively arranged at one side of the corresponding connecting hole along the longitudinal direction so as to be used for matching the elastic strips with the insulating gauge block after the elastic strips correspondingly penetrate.

As a further improvement of the utility model, the steel rail support device also comprises a rail lower backing plate arranged above the middle part of the iron backing plate, and the steel rail can be correspondingly placed on the rail lower backing plate;

and the iron base plate is provided with limiting bosses corresponding to the rail lower base plate along the longitudinal two side wall surfaces respectively, and the top of each limiting boss protrudes out of the top surface of the iron base plate so as to limit the longitudinal movement of the rail lower base plate.

As a further improvement, but the insulating gauge block is provided with spacing arch on the hem outside wall of butt rail foot lateral wall face, and it locates two at this hem outside wall both ends for the branch to be formed with between two spacing archs and to match the spacing recess of bullet strip connecting portion, so that when the insulating gauge block corresponds the setting, each the tip of bullet strip connecting portion can imbed respectively in the corresponding spacing recess.

As a further improvement, the quantity of seting up of spacing breach is 2 ~ 6.

As a further improvement, the utility model discloses a two adjacent spaced angle is the same or different between the spacing breach.

As a further improvement, the spacing gap is three at intervals of 90 degrees in sequence, and two at intervals of 180 degrees the line of the spacing gap is passed through respectively the axis of the bolt connecting hole and the axis of the sleeve body.

As a further improvement of the utility model, the length of the sleeve body is 0.5-2 mm different from the sum of the lengths of the connecting holes and the connecting through holes.

As a further improvement, the utility model also comprises an insulating buffer base plate which can be correspondingly arranged between the elastic base plate and the sleepers.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:

(1) the utility model discloses a fastener system suitable for subway, it sets up elastic backing plate, iron backing plate and eccentric composite bush through corresponding, combines subassembly such as bullet strip, insulating gauge block, coupling assembling, can effectively realize the setting of subway rail on the sleeper, utilize eccentric composite bush can greatly improve the buffering of connecting bolt to the transverse force, improve connecting bolt's life-span, avoid elastic backing plate's elasticity loss simultaneously, and make elastic backing plate have certain pre-compaction, guarantee the fastener system rigidity homogeneous of whole line, and then effectively satisfied the setting needs of subway rail;

(2) the utility model discloses a fastener system suitable for subway, it is through setting up the individual layer iron backing plate, simple structure, and weight is lighter, and the installation of being convenient for, whole cost is lower, can effectively reduce the equipment of fastener system, change cost, reduces subway engineering's construction investment cost, accords with sustainable development's environmental protection theory;

(3) the utility model discloses a fastener system suitable for subway, it both can be used to the setting of the rail of subway in ordinary non-damping section, also can be used to the setting in damping section, only need change different rigidity's elastic backing plate can, it is simple and convenient to change the setting, can effectively guarantee that the structure height of whole track circuit is unanimous, guarantee that damping section and non-damping section have more general parts, can realize interchanging, in later maintenance, can reduce the kind of spare part, be convenient for maintenance management and implementation, thereby reduce cost of maintenance;

(4) the utility model discloses a fastener system suitable for subway, it is through the setting of spacing boss on the iron backing plate and spacing arch on the insulating gauge block, has effectively realized the rail backing plate, the vertical spacing of insulating gauge block after setting up, through the combination setting of above-mentioned structure for the setting stability of fastener system, reliability are higher, have avoided the inefficacy in the fastener system application, have ensured the stability of subway operation, have reduced the cost of overhauing and maintaining;

(5) the utility model discloses a fastener system suitable for subway, its simple structure sets up portably, and the strong reliability can effectively realize setting up and the gauge adjustment of certain extent of subway rail on the sleeper, and the performance that fastener system resisted the transverse force is stronger, can effectively avoid connecting bolt's inefficacy, promotes connecting bolt's life, reduces the maintenance cost of maintenance among the subway operation process, has better application prospect and spreading value.

Drawings

Fig. 1 is a front view of a fastener system suitable for a subway in an embodiment of the present invention;

FIG. 2 is a schematic view of an embodiment of the present invention showing the structure of the insulating cushion plate of the fastener system;

fig. 3(a) - (b) are schematic perspective views of the eccentric composite bushing of the fastener system according to the embodiment of the present invention;

FIG. 4 is a bottom view of the eccentric composite bushing of the fastener system in an embodiment of the present invention;

FIG. 5 is a schematic perspective view of an iron backing plate of the fastener system according to an embodiment of the present invention;

FIG. 6 is a top view of the construction of the iron backing plate of the fastener system in an embodiment of the present invention;

FIG. 7 is a schematic perspective view of an elastic pad of the fastener system according to an embodiment of the present invention;

FIG. 8 is a schematic perspective view of an insulated gauge block of an embodiment of the fastener system of the present invention;

in all the figures, the same reference numerals denote the same features, in particular: 1. an insulating buffer base plate; 2. an elastic backing plate 201 is connected with the through hole; 3. the elastic strip connecting structure comprises an iron base plate, 301 limiting columns, 302 limiting bosses, 303 connecting holes and 304 elastic strip connecting parts; 4. the eccentric composite bushing comprises an eccentric composite bushing body 401, a bushing body 402, an end cap 403, a limiting notch 404 and a buffer layer; 5. connecting components, 501, connecting bolts; 6. an insulating gauge block 601, a limiting bulge; 7. and (4) elastic strips.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

The utility model discloses fastener system suitable for subway in the preferred embodiment is shown in figure 1 ~ 7. As can be seen from the figure, the fastener system comprises an insulating buffer base plate 1, an elastic base plate 2, an iron base plate 3 and a rail lower base plate arranged between the iron base plate 3 and a steel rail from bottom to top, wherein the insulating buffer base plate, the elastic base plate and the iron base plate are sequentially arranged on the shoulder-free sleeper, the eccentric composite bushing 4 and the connecting assembly 5 are correspondingly arranged on the iron base plate 3 in pairs, and an elastic strip 7 and an insulating gauge block 6 are also correspondingly arranged on the steel rail in pairs. Through the corresponding matching between the connecting component 5 and the eccentric composite bushing 4, the insulating buffer base plate 1, the elastic base plate 2 and the iron base plate 3 can be fixedly arranged on the sleeper, and the steel rail can be reliably fixed above the lower base plate of the rail through the corresponding matching of the insulating gauge block 6 and the elastic strip 7.

Specifically, in the preferred embodiment, the insulating cushion plate 1 is directly laid on the sleeper, and in order to increase the lateral frictional force thereof, embossing is performed on the upper and lower surfaces of the insulating cushion plate 1, respectively, as shown in fig. 2. Further, the elastic cushion plate 2 is directly arranged on the top surface of the insulating buffer cushion plate 1, and is in a plate-shaped structure with a certain size as shown in fig. 7, the two transverse ends of the elastic cushion plate 2 are respectively provided with a connecting through hole 201 corresponding to the connecting component 5, and the two connecting through holes 201 are arranged in positions corresponding to the two connecting holes 303 on the iron cushion plate 3 and are arranged along the diagonal.

Further, the iron backing plate 3 in the preferred embodiment is disposed right above the elastic backing plate 2, and as shown in fig. 5 and 6, the iron backing plate includes a plate body having a certain thickness and a plate-shaped structure, and two ends of the plate body along a diagonal line are respectively provided with a connecting hole 303 corresponding to the arrangement of the connecting assembly 5. Further specifically, the connection hole 303 is a circular through hole of a certain size, which can be used for the eccentric composite bushing 4 to just pass through, and the inner diameter of the connection hole 303 is equal to the inner diameter of the connection through hole 201.

Accordingly, spring bar connecting portions 304 are provided on the top surface of the iron shim plate 3 corresponding to the two connecting holes 303 for the corresponding arrangement of the spring bars, as shown in fig. 5. Furthermore, the two elastic strip connecting parts 304 are respectively arranged at one longitudinal side of the corresponding connecting hole 303, namely the two elastic strip connecting parts 304 are arranged at the two transverse ends of the iron base plate 3 along the diagonal line like the two connecting holes 303, and a space for correspondingly placing the rail lower base plate is formed between the two elastic strip connecting parts 304; when the rail is arranged on the sleeper, the two elastic strips 7 can be correspondingly matched with the two elastic strip connecting parts 304 as shown in fig. 1, so that the rail is fixed on the sleeper.

Further, the middle part of the iron base plate 3 is provided with two limiting bosses 302 along the longitudinal two sides, which protrude from the side wall surfaces of the iron base plate 3, as shown in fig. 5 and 6, and the top of the limiting bosses 302 protrude from the top surface of the iron base plate 3, so that when the rail lower base plate is correspondingly arranged on the top surface of the middle part of the iron base plate 3, the rail lower base plate can be correspondingly arranged between the two limiting bosses 302, thereby realizing the longitudinal limitation of the rail lower base plate.

Further, the top surface of the iron shim plate 3 in the preferred embodiment is provided with two limiting posts 301 corresponding to the two connecting holes 303, which are attached to the edges of the connecting holes 303, and one of the limiting posts 301 is disposed on one side of the connecting hole 303 close to the elastic bar connecting portion 304 on the other lateral end, i.e. the limiting post 301 is disposed between the elastic bar connecting portion 304 and the connecting hole 303 in the lateral direction, while the other limiting post 301 is disposed on one side of the connecting hole 303 away from the elastic bar connecting portion 304 in the lateral direction, i.e. the connecting hole 303 corresponding to the limiting post 301 is disposed between the limiting post 301 and the elastic bar connecting portion 304 in the lateral direction, as shown in fig. 6.

Further, the eccentric composite bushing 4 is provided corresponding to the connection hole 303, as shown in fig. 3 and 4. The eccentric composite bushing 4 comprises a cylindrical sleeve body 401 and an end cap 402 coaxially arranged at one end of the sleeve body 401, the inner diameter of the connecting hole 303 is larger than the outer diameter of the sleeve body 401 and smaller than the outer diameter of the end cap 402, and the eccentric composite bushing 4 is of a T-shaped structure; further, the sleeve 401 in the preferred embodiment is made of a polymer material, the length of the sleeve is not greater than the sum of the thicknesses of the iron base plate 3 and the elastic base plate 2, and the difference between the length of the sleeve and the sum of the thicknesses of the two base plates is preferably 0.5-2 mm, so that after the connecting assembly 5 is correspondingly arranged, the elastic base plate 2 can be pre-pressed by 0.5-2 mm until the bottom of the eccentric composite bushing 4 abuts against the insulating buffer base plate 1, and the elastic base plate 2 can be pre-pressed to a certain extent. Obviously, the sleeve 401 and the end cap 402 can be provided separately or integrally.

Further, the middle part of the eccentric composite bushing 4 is provided with a through hole, i.e. a bolt connecting hole, which penetrates through the bushing body 401 and the end cap 402 along the axial direction, the axis of the bolt connecting hole is parallel to the axis of the bushing body 401 and is spaced by a certain distance, so that the distances from the axis of the bolt connecting hole to the edges of different positions of the end cap 402 are unequal, thereby realizing the adjustment of the rail gauge of the steel rail; further, a plurality of arc-shaped notches, namely limiting notches 403, are arranged on the periphery of the end cap 402 at intervals, the distance from each limiting notch 403 to the axis of the bolt connecting hole is unequal, and when the limiting notches 403 are correspondingly matched into the connecting holes 303 in the eccentric composite bushing 4, the limiting notches 403 in the corresponding positions can be matched with the limiting columns 301 on one side of the connecting holes 303, namely the limiting columns 301 are embedded into the corresponding limiting notches 403, so that circumferential limiting of the eccentric composite bushing 4 is realized, rotation after the setting is finished is prevented, and adjustment of the rail gauge of the steel rail can be realized through corresponding rotation of the eccentric composite bushing 4.

In addition, in another preferred embodiment, the bolt connecting hole in the eccentric composite bushing 4 may be coaxially disposed with the sleeve body 401, and the sleeve body 401 and the end cap 402 are eccentrically disposed, so that the distance between the bolt connecting hole and each limit notch on the outer circumference of the end cap 402 is not equal.

Further, in the preferred embodiment, the buffer layer 404 with a certain thickness is circumferentially disposed on the inner peripheral wall surface of the bolt connecting hole, as shown in fig. 3, and is fixedly connected to the inner peripheral wall surface of the bolt connecting hole through vulcanization or physical connection, and by the arrangement of the buffer layer 404, the transverse force applied to the connecting bolt 501 can be effectively buffered, and the service life of the connecting bolt 501 is prolonged. Specifically, in the preferred embodiment, the connecting assembly 5 disposed corresponding to the eccentric composite bushing 4 is as shown in fig. 1 and 2, and includes a connecting bolt 501, and a spring washer and a flat washer sequentially disposed corresponding to the connecting bolt 501, such that the connecting end of the connecting bolt 501 can correspondingly penetrate through the eccentric composite bushing 4 and the insulating cushion plate 1 and then be connected to the sleeper, and the spring washer and the flat washer are sequentially sleeved on the connecting end of the connecting bolt 501 from top to bottom, and are accurately limited between the nut of the connecting bolt 501 and the end surface of the eccentric composite bushing 4, as shown in fig. 1. Through the corresponding matching of the connecting component 5 and the eccentric composite bushing 4, the fixed arrangement of each base plate on the sleeper can be realized, and after the connecting bolt 501 is correspondingly loosened, the position of the eccentric composite bushing 4 is rotated, so that the limiting notch 403 at the corresponding position is matched with the limiting column 301, namely, the distance between the axis of the connecting bolt 501 and the limiting column 301 is correspondingly changed, and the track gauge adjustment of the steel rail is realized.

Further, in the preferred embodiment, the insulating gauge blocks 6 and the elastic bars 7 are arranged corresponding to the steel rails, and the rail lower backing plate is arranged between the steel rails and the iron backing plate 3. Wherein, the rail can be at rail lower bolster, iron tie plate 3, elastic backing plate 2 and insulating buffering bolster 1 from top to bottom when setting gradually on the sleeper, correspond to set up on the rail lower bolster between two bullet strip connecting portion 304, and then insulating gauge block 6 corresponds the setting between rail end of a rail and bullet strip connecting portion 304 to compress tightly the decline rail and fix on the sleeper in the correspondence of bullet strip 7. Obviously, the longitudinal width of the under-rail pad is not greater than the longitudinal width of the iron pad 3, and the transverse width is not greater than the transverse distance between the two elastic strip connecting portions 304, and the transverse and longitudinal limiting of the under-rail pad can be correspondingly realized by the two elastic strip connecting portions 304 and the two limiting bosses 302, respectively.

Further, the insulating gauge block 6 in the preferred embodiment is shown in fig. 8 and includes two flanges at an angle to each other, one of which is adapted to rest on the rail foot upper surface of the rail and the other of which is adapted to abut the rail foot side wall surface of the rail, as shown in fig. 1; correspondingly, be provided with spacing arch 601 respectively at the hem both ends of insulating gauge block 6 butt rail foot lateral wall face, its branch is located the both ends that this hem deviates from a side end face of another hem, and the interval of two spacing arch 601 equals the longitudinal width of bullet strip connecting portion 304, make insulating gauge block 6 correspond after setting up, one side that it deviates from the rail can correspond and match with bullet strip connecting portion 304, make bullet strip connecting portion 304 match between the two spacing arch 601 of embedding, thereby realize insulating gauge block 6 vertical spacing.

Through the corresponding setting of above-mentioned structure, can realize being applicable to the corresponding setting of the fastener system of subway, realize that the rail sets up on the sleeper correspondingly. Meanwhile, the eccentric composite bushing 4 in the preferred embodiment is provided with three limiting notches 403 on the outer periphery of the end cap 402, the three limiting notches 403 are sequentially provided at intervals of approximately 90 degrees, and the connecting lines of the two limiting notches 403 at intervals of 180 degrees respectively pass through the axis of the bolt connecting hole and the axis of the sleeve body 401. More specifically, the three limit notches 403 may respectively correspond to the zero position, the +5mm and the-5 mm adjusting positions, so that the rail gauge adjustment of the rail in the transverse direction by +5mm and-5 mm can be realized. Further, the adjustment of the track gauge in the preferred embodiment can also be realized by replacing the corresponding insulating track gauge block 6, specifically, the adjustment of the track gauge within ± 8mm can be realized by replacing the insulating track gauge block 6 of the corresponding specification, and the adjustment of the track gauge within ± 9mm to ± 18mm can be completed by rotating the eccentric composite bushing 4 and replacing the corresponding insulating track gauge block 6.

Obviously, the number of the limiting notches 403 correspondingly formed in the end cap 402 is not limited to three, and may be set to another number according to actual needs, such as 2, 4, 5, 6, etc., and the number of the limiting notches 403 in the preferred embodiment is 2 to 6. Meanwhile, the spacing angle of each limiting notch 403 can also be optimized according to actual needs, and the spacing angles between two adjacent limiting notches 403 can be the same or different.

In addition, for the fastener system suitable for the subway, the height adjustment of the steel rail can be realized by additionally arranging a rail lower height adjusting base plate below a rail lower base plate, and the adjustment can be correspondingly carried out when the adjustment amount is small; and when the height adjustment amount is large, the combination can be realized by adding the cushion heightening cushion plate under the elastic cushion plate and combining the cushion heightening under the rail. For example, within the range of heightening of 0 ~ 10mm, can realize through the rail height-adjusting backing plate down, and to the height adjustment more than 10mm, can realize through the height-adjusting backing plate that the elasticity backing plate below set up and heightening the backing plate under the rail, under general condition, heightening the backing plate has two kinds 10mm and 20 mm.

The fastener system in the preferred embodiment of the utility model can be used for the setting of the steel rail of the subway track in a common non-damping section and also can be used for the setting in a damping section, and only the elastic base plates with different rigidity need to be replaced, thus effectively ensuring the structural height of the whole track circuit to be consistent, and the two have the most common parts, realizing interchange, reducing the types of spare parts in later-stage maintenance and repair, facilitating maintenance management and implementation and reducing the maintenance cost; meanwhile, the single-layer iron base plate is simple in structure, light in weight, convenient to install and low in overall manufacturing cost, construction investment cost can be effectively reduced, and the environment-friendly concept of sustainable development is met; in addition, in the application of no fender shoulder fastener system, need at first consider connecting bolt to resist the ability of horizontal power, and the utility model provides a fastener system can improve connecting bolt to the buffering of horizontal power greatly through the setting of eccentric composite bush, improves the connecting bolt life-span, avoids the elastic loss of elastic backing plate simultaneously, realizes the certain pre-compaction of elastic backing plate, makes the fastener system rigidity homogeneous of whole circuit to effectively satisfy subway rail's setting needs, have better application prospect and spreading value.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A fastener system suitable for subway comprises an elastic base plate and an iron base plate which can be arranged above a sleeper in a stacking mode, and a connecting assembly which can fix the two base plates on the sleeper, and is characterized by also comprising an eccentric composite bushing which is arranged corresponding to the connecting assembly;

2. The fastener system suitable for the subway according to claim 1, wherein a buffer layer having a certain thickness is fixedly provided on an inner peripheral wall surface of the bolt coupling hole in a circumferential direction.

3. The fastener system suitable for the subway according to claim 1 or 2, further comprising elastic bars and insulating gauge blocks, which are arranged in pairs, and elastic bar connecting portions are respectively provided on both lateral ends of said iron backing plate corresponding to said elastic bars;

4. The fastener system suitable for the subway according to claim 3, wherein said fastener system further comprises a rail lower plate disposed above the middle portion of said iron plate, on which the steel rail can be correspondingly placed;

5. The fastener system for a subway according to claim 3, wherein two limiting protrusions are respectively provided on the outer side wall surface of the flange of said insulating gauge block, which can abut against the bottom side wall surface of the rail, and a limiting groove capable of matching with said elastic strip connecting portion is formed between said two limiting protrusions, so that when said insulating gauge block is correspondingly provided, the end of each of said elastic strip connecting portions can be inserted into the corresponding limiting groove.

6. The fastener system suitable for the subway according to claim 1, 2, 4 or 5, wherein the number of the limiting notches is 2-6.

7. The subway-suitable fastener system as claimed in claim 1, 2, 4 or 5, wherein the spacing angle between two adjacent spacing notches is the same or different.

8. The fastener system suitable for the subway according to claim 1, 2, 4 or 5, wherein the number of the limiting notches is three, the limiting notches are sequentially arranged at intervals of 90 degrees, and connecting lines of the two limiting notches at intervals of 180 degrees respectively pass through an axis of the bolt connecting hole and an axis of the sleeve body.

9. The fastener system suitable for the subway according to claim 1, 2, 4 or 5, wherein the difference between the length of said sleeve body and the sum of the lengths of said connecting hole and said connecting through hole is 0.5-2 mm.

10. The fastener system suitable for the subway according to claim 1, 2, 4 or 5, wherein said fastener system further comprises an insulating buffer pad plate, and said insulating buffer pad plate can be correspondingly arranged between said elastic pad plate and said sleeper.