CN210561487U

CN210561487U - Fastener system suitable for urban railway

Info

Publication number: CN210561487U
Application number: CN201920852567.XU
Authority: CN
Inventors: 梅海军; 喻琦; 许亮
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 urban railway belongs to the relevant technical field of urban railway, 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 and fastening components, utilizes the combination of above-mentioned each structure to match, can effectively realize the setting of urban railway rail on the sleeper, improves the performance that fastener system resists transverse force greatly to can realize the gauge adjustment to a certain extent. The utility model discloses a fastener system suitable for urban railway, its simple structure sets up portably, and the good reliability can effectively realize setting up and the gauge adjustment of certain extent of urban railway 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 the maintenance of urban railway operation in-process, has better application prospect and spreading value.

Description

Fastener system suitable for urban railway

Technical Field

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

Background

The urban railway is a novel rail traffic type and is mainly used for communicating adjacent cities in an area. From the track form, most of the urban railways adopt ballastless track structures, and are a track traffic form between subways and large railways. Generally, the track of the urban railway has the minimum curve radius equivalent to that of a subway track, but the design speed per hour of the urban railway is usually not lower than 140Km/h, which is far higher than the design speed per hour of 80Km/h of the subway, and the axle weight of the train of the urban railway is usually larger than that of the subway train; compared with a large railway, the axle load of the urban railway is mostly equivalent to that of a high-speed railway, but the curve radius of the track is far smaller than that of a high-speed railway, the curve radius of the high-speed railway is generally more than 7000m, and the curve radius of the urban railway is generally about 2000 m. Therefore, a need for a fastener for a city railway having higher resistance to lateral force is required. Meanwhile, the urban railways usually adopt an overhead form and pass through residential areas, and new requirements are provided for the vibration reduction and noise reduction performance of the fasteners.

At present, the non-damping section of urban railway generally adopts the no shoulder elasticity split type fastener that is applicable to the ballastless track of high-speed railway, and the elastic backing plate of this type of fastener sets up below the rail, if directly be used for its little curve radius section of urban railway, because bigger transverse force demand can make the skew of rail railhead big, is unfavorable for the driving safety of vehicle. And to in the aspect of the damping fastener, current urban railway damping fastener, the structural style of double-deck iron tie plate is adopted mostly, for example show among current patent CN 207633146U and CN 207633145U, double-deck damping fastener's structure is complicated, the cost is high, it is inconvenient to dismantle, and can bring the problem of pre-compaction loss to the resilient sleeper, and the structure height after using often is far higher than the height of ordinary section non-damping fastener, it is great to cause damping section and non-damping section structure height to differ, need adopt vertical downhill path to handle, this also can correspondingly produce the influence to the setting of structures such as pantograph, bring very big inconvenience for design and construction.

Although the prior patent CN 105544318A also discloses a double-layer vibration-damping fastener for urban railways, which solves the problem of pre-pressing loss of an elastic backing plate by arranging an iron connecting rod, the iron connecting rod is often easy to rust, the requirement on processing precision is high, the insulation is poor, and along with the increase of the compression permanent deformation of the elastic backing plate, the iron backing plate is easy to contact with the middle part of the iron connecting rod, so that the overall rigidity of the fastener is improved, and the vibration-damping function is lost; in addition, the iron connecting rod is easy to be in rigid contact with the anchor bolt after moving, so that the transverse impact force applied to the anchor bolt in the application process of the fastener cannot be buffered, but is in rigid contact with the iron connecting rod to cause secondary impact, and the service life of the bolt is shortened. In addition, current fastener system function is comparatively single, can't effectively satisfy fastener system's gauge adjustment demand, leads to fastener system's whole roll adjustment ability relatively poor, has certain application limitation.

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 urban railway, wherein set up the elastic backing plate through corresponding, iron tie plate and eccentric composite bush, combine the bullet strip, insulating gauge block, subassemblies such as coupling assembling and fastening components, can effectively realize the setting of urban railway rail on the sleeper, the setting that utilizes eccentric composite bush can effectively promote connecting bolt to resist the performance of transverse force, and satisfy the rail gauge adjustment of certain extent, realize the stable setting of urban railway rail on the sleeper.

In order to achieve the purpose, the utility model provides a fastener system suitable for urban railway, which comprises an insulating buffer backing plate, an elastic backing plate and an iron backing plate which can be arranged on the top surface of a sleeper from bottom to top in sequence, and a connecting component which can fix the backing plates on the sleeper, and is characterized by also comprising an eccentric composite bushing which is arranged corresponding to the connecting component;

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, namely limiting notches, are formed in the periphery of the end cap, 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, connecting holes penetrating through two end faces are formed in two ends of the iron base plate respectively corresponding to the eccentric composite bushing, 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, so that the eccentric composite bushing can correspondingly penetrate through the connecting holes and is limited by the end caps of the connecting holes; and one side of two said attachment holes has spacing posts separately, the said spacing post corresponds to the said spacing gap arrangement, it is set up on the top surface of the said iron tie plate, and can imbed the correspondent spacing gap after the said eccentric composite bush matches with said attachment hole, in order to prevent the said eccentric composite bush from rotating around the axle in the application; correspondingly, one of the two limiting columns is arranged on one side, away from the other connecting hole, of the corresponding connecting hole, and is arranged in a coplanar manner with the axes of the two connecting holes, and the distance between the two limiting columns is equal to the distance between the axes of the two connecting holes;

the elastic base plate is arranged between the iron base plate and the insulating buffer base plate, two ends of the elastic base plate are respectively provided with a connecting through hole 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; 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; then, the base plates of the fastener system can be correspondingly connected to the sleeper through the eccentric composite bushings and the connecting assembly which are arranged in pairs, and the switching of the corresponding limiting notches can be realized through the simultaneous rotation of the two eccentric composite bushings, so that the rail gauge adjustment of the steel rail above the iron base plate is realized.

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 iron backing plate is provided with fastening holes which penetrate through two end faces and are in a long waist shape in pairs, and fastening components are arranged corresponding to the fastening holes;

the fastening assembly comprises a T-shaped bolt and a nut which can be correspondingly matched;

the T-shaped bolt can penetrate through the fastening hole from the bottom surface of the iron base plate, and a nut of the T-shaped bolt can be completely embedded into the two arc-shaped blind holes and is limited annularly by the two limiting bulges.

As a further improvement of the utility model, the steel rail support device also comprises a rail lower base plate arranged above the middle part of the iron base plate, and the steel rail can be correspondingly placed above the rail lower base 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 of the utility model, the steel rail fastening device also comprises an elastic strip and an insulating gauge block, and two ends corresponding to the top surface of the iron backing plate are respectively provided with a retaining shoulder and a supporting boss corresponding to the fastening hole;

the two retaining shoulders are respectively arranged at two sides of the placement area of the lower rail backing plate and can be used for transverse limiting of the lower rail backing plate and abutting against one side of the insulating gauge block, which is far away from the steel rail;

the support boss is arranged between the connecting hole and the fastening hole and can be used for placing the tail end of the elastic strip.

As a further improvement, but insulating gauge block butt correspond on the hem outside wall of rail foot side wall face keep off the shoulder and be provided with and keep off the shoulder arch, it locates two at this hem outside wall both ends for dividing to but be formed with the holding between two fender shoulder archs keep off the spacing recess of shoulder, so that when insulating gauge block corresponds the setting, each keep off the shoulder and can imbed respectively in the spacing recess that corresponds, thereby realize vertical spacing of insulating gauge block.

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

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, the counter bore has been seted up to the nut of T type bolt on the top surface of elastic backing plate, promptly the counter bore is two along the horizontal interval seted up, just the counter bore is blind hole or through-hole.

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 urban railway, it sets up elastic backing plate, iron tie plate and eccentric composite bush through corresponding, combine subassembly such as bullet strip, insulating gauge block, coupling assembling and fastening components, can effectively realize the setting of urban railway rail on the sleeper, utilize eccentric composite bush can improve the buffering of connecting bolt to the transverse force greatly, improve the life-span of connecting bolt, avoid the elastic loss of elastic backing plate simultaneously, and make the elastic backing plate have certain pre-compaction, guarantee that the fastener system rigidity of whole circuit is homogeneous, and then effectively satisfied the setting needs of urban railway rail;

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

(3) the utility model discloses a fastener system suitable for urban railway, it both can be used to the setting of the rail of urban railway 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 urban railway, it is through spacing boss on the iron backing plate, spacing arch, fender shoulder, and keep off the setting of structures such as shoulder arch on the insulating gauge block, effectively realized the spacing of structures such as rail lower bolster, insulating gauge block, T type bolt, through the combination setting of above-mentioned structure, make the setting stability, the reliability of fastener system higher, avoided the inefficacy in the fastener system application process, ensured the stability of urban railway operation, reduced the cost of overhauing and maintaining;

(5) the utility model discloses a fastener system suitable for urban railway, its simple structure sets up portably, and the good reliability can effectively realize setting up and the gauge adjustment of certain extent of urban railway 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 the maintenance of urban railway operation in-process, has better application prospect and spreading value.

Drawings

Fig. 1 is a front view of a fastener system for a city railway according to an embodiment of the present invention;

fig. 2 is a top view of the fastener system for a city railway according to an embodiment of the present invention;

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 top view of an iron backing plate of a fastener system according to an embodiment of the present invention;

FIG. 6 is a schematic bottom view of an iron backing plate of a fastener system according to an embodiment of the present invention;

FIG. 7 is a side view of the construction of the iron backing plate of the fastener system in an embodiment of the invention;

FIG. 8 is a top view of the construction of the iron backing plate of the fastener system in an embodiment of the present invention;

FIG. 9 is a bottom view of the construction of the iron backing plate of the fastener system in an embodiment of the present invention;

fig. 10 is a schematic perspective view of an insulated gauge block of a fastener system according to an embodiment of the present invention;

FIG. 11 is a schematic perspective view of an elastic pad of the fastener system according to an embodiment of the present invention;

FIG. 12 is a bottom view of the construction of the resilient pad of the fastener system in an embodiment of the invention;

in all the figures, the same reference numerals denote the same features, in particular: 1. 2, insulating buffer backing plate, 2, elastic backing plate, 201, counter bore, 202, connecting through hole; 3. the steel plate comprises an iron base plate, 301, a limiting column, 302, a limiting boss, 303, a retaining shoulder, 304, a supporting boss, 305, a connecting hole, 306, a fastening hole and 307, and a limiting bulge; 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 assembly, 501, connecting bolt, 502, spring washer, 503, flat washer; 6. a fastening assembly 601, a T-shaped bolt, 602, a nut, 603, a flat washer for the T-shaped bolt; 7. elastic strips, 8 insulating gauge blocks, 801 retaining shoulder protrusions; 9. and a rail lower backing plate.

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 fastener system suitable for urban railways in the preferred embodiment of the present invention is shown in fig. 1-12. 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 9 which are sequentially arranged on the shoulder-free sleeper, wherein the rail lower base plate 9 is arranged between the iron base plate 3 and the steel rail, eccentric composite bushings 4 and connecting assemblies 5 are arranged in pairs corresponding to the base plates, and fastening assemblies 6, elastic strips 7 and insulating gauge blocks 8 are further arranged in pairs corresponding to the steel rail. 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 rail base plate 9 through the corresponding matching of the fastening component 6, the elastic strip 7 and the insulating gauge block 8.

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.

Further, the elastic cushion plate 2 is directly arranged on the top surface of the insulating buffer cushion plate 1, as shown in fig. 11 and 12, the elastic cushion plate is of a plate-shaped structure with a certain size, the two transverse ends of the elastic cushion plate 2 correspond to the connecting assemblies 5 respectively and are provided with the connecting through holes 202, and the arrangement of the two fastening assemblies 6 above the elastic cushion plate on the plate surface between the two connecting through holes is provided with the counter bores 201 with a certain depth respectively, so that the situation that the top surface of the elastic cushion plate 2 is sheared and damaged by the edges of the fastening holes 306 on the bottom surface of the iron cushion plate 3 in the fastener application process is avoided, meanwhile, the elastic cushion plate 2 is prevented from contacting with the head of the T-shaped bolt 601 in the fastening assemblies 6 after being pressed, and.

Further, the iron backing plate 3 in the preferred embodiment is disposed directly above the elastic backing plate 2, and as shown in fig. 5 to 9, the iron backing plate includes a plate body having a certain thickness and a plate-shaped structure, two ends of the plate body are respectively opened with a connecting hole 305 corresponding to the arrangement of the connecting component 5, and a fastening hole 306 corresponding to the two fastening components 6 is opened between the two connecting holes 305.

Specifically, the connection hole 305 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 305 is equal to the inner diameter of the connection through hole 202; further, the fastening holes 306 are arranged to be long waist-shaped holes along the longitudinal direction, and arc-shaped blind holes with a certain depth are formed in the bottom surface of the iron base plate 3 corresponding to the two lateral sides of each fastening hole 306, so that two obliquely opposite limiting protrusions 307 are formed on the two sides of the fastening holes 306 respectively, as shown in fig. 6 and 9, nuts of the T-shaped bolts 601 in the fastening assembly 6 can be correspondingly embedded into the arc-shaped blind holes in the bottom surface of the iron base plate 3 and are limited by the two limiting protrusions 307, and therefore the rotation of the T-shaped bolts 601 in the application process can be effectively prevented, and the effect failure of the T-shaped bolts 601 is avoided.

Accordingly, the corresponding fastening hole 306 is provided with a shoulder 303 and a support boss 304 on the top surface of the iron shim plate 3, as shown in fig. 5. The blocking shoulders 303 are arranged on one side of the fastening hole 306, which is far away from the connecting hole 305, so as to be used for limiting the insulating gauge block 8, and the area between the two blocking shoulders 303 is used for correspondingly arranging the rail lower backing plate 9 and the steel rail above the rail lower backing plate 9; further, the supporting boss 304 is arranged between the fastening hole 306 and the connecting hole 305, and an arc-shaped groove is formed in the top of the supporting boss for placing and limiting the rear end of the elastic strip 7; in the preferred embodiment, the number of support bosses 304 is two spaced apart in the longitudinal direction.

Further, limiting bosses 302 are respectively arranged on the middle portion of the iron base plate 3 along the longitudinal two sides and protrude out of the side wall surface of the iron base plate 3, and the top portions of the limiting bosses 302 protrude out of the top surface of the iron base plate 3, so that when the rail lower base plate 9 is correspondingly arranged on the top surface of the middle portion of the iron base plate 3, the rail lower base plate 9 can be correspondingly arranged between the two limiting bosses 302, and longitudinal limiting of the rail lower base plate 9 is achieved.

Further, the top surface of the iron shim plate 3 in the preferred embodiment is provided with two limiting columns 301 corresponding to the two connection holes 305, the limiting columns 301 are attached to the edges of the connection holes 305, one of the limiting columns 301 is arranged on one side of the connection hole 305 close to the fastening hole, and the other limiting column 301 is arranged on one side of the connection hole 305 away from the fastening hole.

Further, the eccentric composite bushing 4 is provided corresponding to the connection hole 305, 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 305 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 circular 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 305 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 305, namely the limiting columns 301 are embedded into the corresponding limiting notches 403, so that the circumferential limiting of the eccentric composite bushing 4 is realized, and the rotation of the eccentric composite bushing after the setting is prevented.

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, the buffer layer 404 with a certain thickness is circumferentially arranged on the inner peripheral wall surface of the bolt connecting hole in the preferred embodiment, as shown in fig. 3, the buffer layer 404 is fixedly connected to the inner peripheral wall surface of the bolt connecting hole in a vulcanization or physical connection manner, and by arranging 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 502 and a flat washer 503 disposed corresponding to the connecting bolt 501, then the connecting end of the connecting bolt 501 can be connected to the sleeper after passing through the eccentric composite bushing 4 and the insulating cushion plate 1, and the spring washer 502 and the flat washer 503 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, the preferred embodiment is provided with a fastening assembly 6 and a spring bar 7 corresponding to the iron tie plate 3, and an insulating gauge block 8. The fastening assembly 6 comprises a T-shaped bolt 601 and a nut 602 which can be matched with the T-shaped bolt, the connecting end of the T-shaped bolt 601 can penetrate through the fastening hole 306 from the bottom surface of the iron base plate 3 and then is matched with the elastic strip 7 correspondingly arranged on the supporting boss 304 and the insulating gauge block 8, the elastic strip 7 is correspondingly pressed on the supporting boss 304 and the insulating gauge block 8 through the nut 602, and the elastic strip 7 and the insulating gauge block 8 are correspondingly fixed, so that the steel rail is fixed above the iron base plate 3; correspondingly, the nut of the T-shaped bolt 601 can be correspondingly accommodated in the arc-shaped blind hole on the bottom surface of the iron backing plate 3, so that the influence of the T-shaped bolt 601 on the arrangement of the iron backing plate 3 and the elastic backing plate 2 is avoided, and the nut of the T-shaped bolt 601 is correspondingly limited by two limiting protrusions 307 which are oppositely arranged in an inclined manner, so that the rotation failure after the arrangement is prevented; further preferably, a T-bolt flat washer 603 is provided between the nut 602 and the elastic strip 7.

Further, a rail lower backing plate 9 is correspondingly arranged between the steel rail and the iron backing plate 3, the longitudinal width of the rail lower backing plate is not larger than the longitudinal width of the iron backing plate 3, and the transverse width of the rail lower backing plate is not larger than the distance between the two retaining shoulders 303, so that the rail lower backing plate 9 can be correspondingly arranged between the two retaining shoulders 303, and longitudinal limitation is realized by the two limiting bosses 302.

Further, the insulating gauge block 8 in the preferred embodiment is shown in fig. 10 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 respectively at the hem both ends of insulating gauge block 8 butt rail foot lateral wall face and keep off shoulder protruding 801, its branch is located the both ends that this hem deviates from a side terminal surface of another hem, and two keep off the protruding 801 of shoulder's interval and equal to the longitudinal width of keeping off shoulder 303, make insulating gauge block 8 correspond after setting up, its one side that deviates from the rail can correspond and keep off shoulder 303 and match, make keep off shoulder 303 and match and imbed between two fender shoulder protruding 801, thereby realize insulating gauge block 8's vertical spacing.

Through the corresponding setting of above-mentioned structure, can realize being applicable to the corresponding setting of fastener system of urban area railway, 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 90 degrees, and the connecting line of the two limiting notches 403 at intervals of 180 degrees respectively passes 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 8, specifically, the adjustment of the track gauge within ± 8mm can be realized by replacing the insulating track gauge block 8 with 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 8.

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 urban railway, 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 arrangement of the steel rail of the urban railway in the common non-vibration damping section and the arrangement of the steel rail in the vibration 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 the interchange, reducing the types of spare parts in the later maintenance and repair, facilitating the 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 the setting needs of municipality territory railway rail, 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 urban railways comprises an insulating buffer base plate, an elastic base plate and an iron base plate which can be sequentially arranged on the top surface of a sleeper from bottom to top, and a connecting assembly which can fix the base plates on the sleeper, and is characterized by further comprising an eccentric composite bushing arranged corresponding to the connecting assembly;

the iron base plate is of a plate-shaped structure, two ends of the iron base plate are respectively provided with connecting holes penetrating through two end faces corresponding to the eccentric composite bushing, 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; and one side of two said attachment holes has spacing posts separately, the said spacing post corresponds to the said spacing gap arrangement, it is set up in the top of the said iron tie plate, and can imbed the correspondent spacing gap after the said eccentric composite bush matches with said attachment hole, in order to prevent the said eccentric composite bush from rotating around the axle in the application; correspondingly, one of the two limiting columns is arranged on one side, away from the other connecting hole, of the corresponding connecting hole, and is arranged in a coplanar manner with the axes of the two connecting holes, and the distance between the two limiting columns is equal to the distance between the axes of the two connecting holes;

the elastic base plate is arranged between the iron base plate and the insulating buffer base plate, two ends of the elastic base plate are respectively provided with a connecting through hole 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.

2. The urban railway applicable fastener system according to claim 1, wherein a buffer layer of a certain thickness is fixedly provided on an inner peripheral wall surface of the bolt-attaching hole in a circumferential direction.

3. The fastener system suitable for the urban railway according to claim 1 or 2, wherein the iron backing plate is provided with fastening holes penetrating through both end faces and having a long waist shape in pairs, and fastening members are provided corresponding to the fastening holes;

4. The urban railway applicable fastener system according to claim 3, further comprising an under-rail pad disposed above the middle of the iron pad, over which the steel rail can be correspondingly placed;

5. The fastener system suitable for the urban railway according to claim 4, further comprising an elastic strip and an insulating gauge block, wherein a retaining shoulder and a supporting boss are respectively arranged at two ends of the top surface of the iron backing plate corresponding to the fastening holes;

6. The urban railway fastener system according to claim 5, wherein the insulating gauge block is provided with two shoulder protrusions corresponding to the shoulders on the outer wall surface of the flange, the two shoulder protrusions being respectively disposed at two ends of the outer wall surface of the flange, and a limiting groove capable of accommodating the shoulder is formed between the two shoulder protrusions, so that when the insulating gauge block is correspondingly disposed, each shoulder can be respectively inserted into the corresponding limiting groove, thereby achieving longitudinal limiting of the insulating gauge block.

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

8. The fastener system suitable for the urban railway according to claim 7, wherein the spacing notches are three at 90 ° intervals in sequence, and a connecting line of the two spacing notches at 180 ° intervals passes through an axis of the bolt connecting hole and an axis of the sleeve body respectively.

9. The fastener system suitable for the urban railway according to claim 3, wherein counterbores are formed in the top surface of the elastic cushion plate corresponding to the nuts of the T-shaped bolts, namely the counterbores are two and spaced in the transverse direction, and the counterbores are blind holes or through holes.