CN108978364A - Keep off shoulder formula damping fastener - Google Patents

Abstract

The utility model discloses a shoulder-blocking type vibration-damping fastener, which comprises a backing plate and an anchoring bolt; the backing plate is provided with a through hole, the anchor bolt penetrates through the through hole to fix the backing plate on a track foundation, and the upper surface of the backing plate is provided with at least two elastic strip seats; the base plate is provided with a limiting blocking shoulder used for limiting the transverse displacement between the base plate and the rail foundation, and the limiting blocking shoulder is matched and connected with a groove arranged on the rail foundation. The invention can be applied to the field of rail transit, can effectively overcome the defects in the prior art, can effectively reduce the overall cost of the fastener, and can effectively shorten the length of the anchor bolt; furthermore, the technical effect of vibration reduction of the double-layer elastic body can be achieved.

Description

A shoulder-type shock-absorbing fastener

technical field

The application relates to but not limited to the field of rail transit, especially a shoulder-stop vibration-absorbing fastener.

Background technique

In recent years, with the rapid development of rail transit systems represented by subways and intercity railways, the tense situation of urban traffic has been effectively alleviated. Production and life have brought great troubles. As the connecting part between the rail and the sleeper, the rail fastener not only has the function of fixing the rail, but also has the function of reducing vibration and noise, which has been paid more and more attention by people.

At present, a series of rail fastener products with vibration and noise reduction functions have been launched on the market; among many vibration-damping fastener products, the detachable double-layer vibration-damping fastener realizes two-layer elastic body vibration reduction to achieve It has a high vibration reduction effect and can easily realize the disassembly and replacement of parts, so it has won a large number of applications and is favored by the market.

In order to realize the damping of the double-layer elastic body of the rail fastener, different technical solutions have been disclosed in the prior art CN 2554216Y, CN 102979013A, and CN205134109 U. These disclosed prior art all realize the damping effect through the cooperation of two layers of backing plates and two layers of elastic bodies in the system. Insert the nylon sleeve fixed in the ballast bed foundation and press it on the lower backing plate, so as to fix the fastener system on the ballast bed foundation. Figure 1 is a typical prior art structure diagram.

The above-mentioned prior art can give full play to the damping function of the two-layer elastic body and achieve a higher damping amount, but there are still the following deficiencies:

1. Compared with ordinary fasteners, the cost is high.

In the structures of the prior art, two layers of metal backing plates are required, and the two layers of backing plates play different roles respectively. These two layers of metal backing plates are the two most expensive components in the entire fastener system, accounting for more than 70% of the overall cost. Compared with the single-layer metal backing plate of ordinary fasteners, an additional layer of metal backing plate is added. A substantial increase in cost.

2. The anchor bolts are long and prone to shear deformation, posing potential safety hazards.

Compared with the anchor bolts of ordinary single-layer backing plate fasteners, which only need to pass through one layer of backing plate and one layer of elastic body, the anchor bolts in the above-mentioned double-layer fasteners need to press the upper iron plate, middle elastic body, and lower iron plate simultaneously. Closely on the foundation of the ballast bed, the entire anchor bolt runs through the upper iron plate, the middle elastic body, and the lower iron plate, which directly causes the length of the anchor bolt to increase. When the train is running, the lateral force applied to the rail is transmitted to the anchor bolts. Since the anchor bolts protrude from the foundation of the ballast bed relatively too long, the shear moment generated by the lateral force will be greater, and the anchor bolts will undergo greater shear deformation. , greatly reducing the life of the anchor bolts, so that there are hidden dangers in safe driving.

3. Compared with ordinary fasteners, the installation height of the steel rail in the prior art is higher.

Since there are two layers of metal backing plates in the prior art, compared with the single-layer metal backing plate of ordinary fasteners, the height of the fasteners in the prior art is higher, usually more than 14mm higher, resulting in the height of the rail bottom to the sleeper surface. On the high side. The installation height of the rail is high. On the one hand, the section height of the subway tunnel is required to increase, thereby increasing the construction cost of the tunnel; on the other hand, the higher the height of the rail to the sleeper surface, the worse the lateral stability of the rail, which will affect the safety of the entire system. and stability are adversely affected.

Contents of the invention

The technical problem to be solved by this application is to provide a shoulder-type damping fastener, which can effectively overcome the defects in the prior art, effectively reduce the overall cost of the fastener, and effectively shorten the length of the anchor bolt; further, The vibration damping technical effect of the double-layer elastomer can be realized.

In order to solve the above technical problems, the application provides a shoulder-type damping fastener, including a backing plate and anchor bolts;

The backing plate is provided with a through hole, and the anchor bolt penetrates the through hole to fix the backing plate on the track foundation, and at least two spring bar seats are arranged on the upper surface of the backing plate;

The backing plate is provided with a limit shoulder for limiting the lateral displacement between the backing plate and the track foundation, and the limit stop shoulder is matched and connected with the groove provided on the track foundation.

The above-mentioned shoulder-stop damping fastener can also have the following characteristics,

The limiting shoulder is arranged on the lower surface of the backing plate;

The limiting shoulder is set as a protruding structure, a buffer layer is arranged between the protruding structure and the groove, the buffer layer is arranged in the groove, and/or the protruding structure is provided superior.

The above-mentioned shoulder-stop damping fastener can also have the following characteristics,

The limit stop shoulder is arranged at two side positions of the backing plate parallel to the track;

A buffer layer is arranged between the limiting shoulder and the groove, and the buffer layer is arranged in the groove and/or on the limiting shoulder.

The above-mentioned shoulder-stop damping fastener can also have the following characteristics,

It also includes a first elastic pad and a second elastic pad, the first elastic pad is arranged on the upper surface of the backing plate, and the second elastic pad is arranged on the lower surface of the backing plate.

The above-mentioned shoulder-stop damping fastener can also have the following characteristics,

It also includes a locking sleeve, the locking sleeve is arranged in the through hole, and the locking sleeve has a flange that clamps the upper surface of the backing plate;

The anchor bolt passes through the locking sleeve and is connected with the embedded casing in the track foundation.

The above-mentioned shoulder-stop damping fastener can also have the following characteristics,

An adjusting gasket is also included, and the adjusting gasket is arranged between the upper surface of the backing plate and the flange of the locking sleeve.

The above-mentioned shoulder-stop damping fastener can also have the following characteristics,

An insulating sleeve is also included, and the insulating sleeve is arranged between the backing plate and the locking sleeve.

The above-mentioned shoulder-stop damping fastener can also have the following characteristics,

It also includes a height-adjusting pad, and the height-adjusting pad is arranged between the second elastic pad and the pad, and/or between the second elastic pad and the track foundation.

The above-mentioned shoulder-stop damping fastener can also have the following characteristics,

The through hole runs through the protruding structure.

The above-mentioned shoulder-stop damping fastener can also have the following characteristics,

At least two protruding structures are arranged on the lower surface of the backing plate, and the protruding structures are evenly distributed on the lower surface of the backing plate.

The above-mentioned shoulder-stop damping fastener can also have the following characteristics,

The lower surface of the backing plate is provided with an annular groove surrounding the protruding structure, and the end of the buffer layer extends into the annular groove.

The above-mentioned technical scheme of the present application has the following beneficial effects:

Compared with the prior art, this application can realize the lateral limit operation between the backing plate and the track foundation through the cooperative connection between the above-mentioned protrusion structure and the groove, and can effectively transmit the lateral force through the shoulder , to avoid the anchor bolts from being subjected to transverse shear force, that is, it can effectively improve the connection stability between the backing plate and the track, and can effectively prolong the service life of the anchor bolts; through the above-mentioned connection between the anchor bolts and the track foundation, It can realize the longitudinal limit operation between the backing plate and the track, and provide sufficient pre-tightening force required for the installation of the spring bar.

Further, the present application can also use the above-mentioned optimal backing plate structure, which can effectively reduce the application of a layer of metal backing plate, on the one hand, it can directly reduce the overall cost of the fastener, on the other hand, it can also effectively shorten the length of the anchor bolt, It not only reduces the production cost of anchor bolts, but also greatly reduces the risk of anchor bolts being sheared; at the same time, the overall reduction in the height of the above-mentioned fasteners can effectively increase the stability of the track system and provide a certain space for further reducing the height of the tunnel section.

Further, the present application can also avoid the rigid contact between the raised structure and the groove through the setting of the above-mentioned buffer layer, and can effectively realize the flexible contact between the two through the setting of the buffer layer; at the same time, the above-mentioned buffer layer The setting can also increase a certain pre-tightening force for the backing plate, thereby improving the overall structural stability of the fastener.

Further, the application can also realize the convenient adjustment operation of the pre-tightening force of the middle elastic pad through the setting of the above-mentioned adjusting gasket; the height-adjusting backing plate can be set on the upper or lower surface of the second elastic pad, or up and down The surface is set at the same time, which can realize the adjustment of the height of different fasteners; furthermore, by setting the height-adjusting spacers of different thicknesses, the adjustment operation of the preset height can be realized.

Further, the present application can also achieve a relatively stable insulating technical effect between the anchor bolt and the backing plate through the setting of the above-mentioned insulating sleeve; the above-mentioned insulating sleeve is made of non-metallic material, which can also play an insulating role It has a certain buffering and vibration reduction effect, and can further improve the operation stability of the fastener system.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be apparent from the description, or can be learned by practice of the invention. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical solution of the present application, and do not constitute a limitation to the technical solution of the present application.

Fig. 1 is the structural representation of the double-layer damping fastener in the prior art;

FIG. 2 is a schematic structural view of Embodiment 1 of the present invention;

Fig. 3 is a structural schematic diagram of a backing plate in Embodiment 1 of the present invention;

Fig. 4 is a schematic view of the track infrastructure structure of Embodiment 1 of the present invention;

Fig. 5 is a cross-sectional view of the track infrastructure structure of Embodiment 1 of the present invention;

Fig. 6 is a schematic structural diagram of the first elastic pad according to Embodiment 1 of the present invention;

Fig. 7 is a schematic structural diagram of the first elastic pad according to Embodiment 1 of the present invention;

Fig. 8 is a schematic structural diagram of a locking sleeve according to Embodiment 1 of the present invention;

Fig. 9 is a partial schematic diagram 1 of Embodiment 1 of the present invention;

Fig. 10 is a partial schematic diagram II of Embodiment 1 of the present invention;

Fig. 11 is a schematic structural diagram of an adjusting gasket according to Embodiment 1 of the present invention;

Fig. 12 is a third partial cross-sectional view of Embodiment 1 of the present invention;

Fig. 13 is a schematic structural diagram of an insulating sleeve according to Embodiment 1 of the present invention;

Fig. 14 is a partial sectional view 4 of Embodiment 1 of the present invention;

Fig. 15 is a schematic structural diagram of Embodiment 2 of the present invention;

Fig. 16 is a schematic diagram of the backing plate structure of Embodiment 2 of the present invention;

Fig. 17 is a schematic structural diagram of Embodiment 3 of the present invention;

Fig. 18 is a schematic diagram of the connection between the embedded casing and the buffer layer according to the third embodiment of the present invention;

Fig. 19 is a schematic structural diagram of Embodiment 4 of the present invention;

Fig. 20 is a schematic structural diagram of Embodiment 5 of the present invention;

Fig. 21 is a schematic diagram of the track infrastructure structure of Embodiment 5 of the present invention;

Graphical description:

1-rail, 2-backing plate, 21-raised structure, 22-through hole, 3-track foundation, 31-groove, 32-buffer layer, 4-first elastic pad, 5-anchor bolt, 6-spring Strip, 7-locking sleeve, 8-second elastic pad, 9-embedded sleeve, 10-adjusting gasket, 11-insulating sleeve, 12-bending edge.

Detailed ways

Embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

Embodiment one:

As shown in Figure 2, the embodiment of the present invention provides a shoulder-type shock-absorbing fastener, including a backing plate 2, anchor bolts 5, spring bars 6, spring bar seats and gauge blocks. hole 22, the anchor bolt 5 penetrates the through hole 22 of the backing plate 2 and fixes the backing plate 2 on the track foundation 3; the upper surface of the backing plate 2 is provided with at least two elastic strip seats, and one end of the elastic strip 6 is arranged on On the elastic bar seat, the other end of the elastic bar 6 compresses the gauge block.

Preferably, the backing plate 2 is provided with a limiting shoulder for limiting the lateral displacement between the backing plate 2 and the track foundation 3 , and the limiting shoulder is matched with a groove provided on the track foundation 3 .

As shown in FIG. 3 and FIG. 4 , in this embodiment, the above-mentioned limiting shoulder is arranged on the lower surface of the backing plate 2; In the groove 31, the above-mentioned protruding structure 21 may be arranged as a cylindrical structure, a rectangular structure, or other similar structures.

As shown in FIG. 4 , the track foundation 3 is provided with a groove 31 matching the raised structure 21 .

In the specific operation, through the cooperative connection between the above-mentioned protruding structure 21 and the groove 31, the lateral limit operation between the backing plate 2 and the track foundation 3 can be realized, and the lateral position can be adjusted by the protruding structure 21 and the groove 31. The force is effectively transmitted to prevent the anchor bolt 5 from being subjected to transverse shear force, which can effectively improve the connection stability between the backing plate 2 and the track, and can effectively prolong the service life of the anchor bolt 5; The connection between 5 and the track foundation 3 can realize the longitudinal limit operation between the backing plate 2 and the track, and provide sufficient pre-tightening force required for the installation of the elastic bar 6 .

Compared with the prior art, the above-mentioned preferred backing plate structure can effectively reduce the application of one layer of metal backing plate, on the one hand, it can directly reduce the overall cost of the fastener, on the other hand, it can also effectively shorten the length of the anchor bolt 5, It not only reduces the production cost of the anchor bolt 5, but also can greatly reduce the risk of shearing the anchor bolt 5; at the same time, the overall reduction in the height of the above-mentioned fasteners can effectively increase the stability of the track system and provide a certain level of support for further reducing the height of the tunnel section. space.

Preferably, in order to effectively improve the connection stability between backing plate 2 and track foundation 3; Inside, and/or set on the protruding structure 21.

In specific operation, through the setting of the buffer layer 32, the rigid contact between the raised structure 21 and the groove 31 can be avoided, and the flexible contact between the two can be effectively realized through the setting of the buffer layer 32; at the same time, the above buffer The arrangement of the layer 32 can also increase a certain pre-tightening force for the backing plate 2, thereby improving the overall structural stability of the fastener.

As shown in Figure 5, the above-mentioned buffer layer 32 can be optionally arranged on the inner surface of the groove 31, or on the outer surface of the raised structure 21, or on the inner surface of the groove 31 and the outer surface of the raised structure 21. On the surface, the various arrangement schemes mentioned above can all achieve good beneficial technical effects; in this embodiment, the above-mentioned buffer layer 32 can be made of non-metallic material, preferably a rubber-plastic buffer layer.

As shown in FIG. 6 and FIG. 7, preferably, a first elastic pad 4 and a second elastic pad 8 are also included, the first elastic pad 4 is arranged on the upper surface of the backing plate 2, and the second elastic pad 8 is arranged on the lower surface . In the specific operation, the above-mentioned first elastic pad 4 can be an under-rail elastic pad, and the above-mentioned second elastic pad 8 can be an intermediate elastic pad. The setting of the above-mentioned double-layer elastic pad can greatly exert the vibration-damping performance of the shock-absorbing fastener. , which in turn can effectively ensure the structural stability of the fastener when the train is running.

As shown in FIG. 8, in this embodiment, the above-mentioned fastener system further includes a locking sleeve 7, which is disposed in the through hole 22, and the locking sleeve 7 has a flange that clamps the upper surface of the backing plate 2; The anchor bolt 5 passes through the locking sleeve 7 and is screwed to the embedded sleeve 9 in the track foundation 3; the above locking sleeve 7 can be arranged in a columnar structure, or other similar structures.

In the specific operation, the middle elastic pad can be arranged on the track foundation 3, and the hole on the middle elastic pad is aligned with the embedded casing 9 and the groove 31 on the track foundation 3; the backing plate 2 is placed on the middle elastic pad, And the through hole 22 on the backing plate 2 is aligned with the embedded casing 9 on the track foundation 3, the raised structure 21 on the backing plate 2 is aligned with the groove 31 on the track foundation 3, and the raised structure 21 is inserted into the groove 31; then the elastic pad under the rail is arranged on the upper surface of the backing plate 2, and the rail 1 is placed on the elastic pad under the rail; the elastic strip 6 is fixed on the elastic strip 6 seat of the backing plate 2, and the elastic strip 6 passes through the rail Hold down the corresponding position of rail 1 from block.

Furthermore, the locking sleeve 7 is inserted into the through hole 22 of the backing plate 2 from top to bottom, the flange of the locking sleeve 7 is pressed against the upper surface of the backing plate 2, and there is a gap between the bottom of the locking sleeve 7 and the track foundation 3 , as shown in Figure 9; the anchor bolt 5 is inserted into the through hole 22 of the locking sleeve 7 from top to bottom, passes through the backing plate 2, and the middle elastic pad enters the embedded casing 9; when the anchor bolt 5 is tightened, the anchor bolt 5 Apply pressure to the locking sleeve 7, and the pressure is transmitted to the backing plate 2 through the upper flange structure of the locking sleeve 7, and then to the track foundation 3 through the middle elastic pad.

Finally, during the tightening process of the anchor bolt 5, the middle elastic pad is gradually compressed. After the spike is tightened, the locking sleeve 7 is in close contact with the track foundation 3, and the thickness of the middle elastic pad is compressed to be the same as the gap, as shown in FIG. 10 As shown, the middle elastic pad obtains a stable preload; further, in this embodiment, the middle rubber pad can obtain different preloads by adjusting the size of the gap, and then the support stiffness of the fastener can be adjusted.

As shown in Fig. 11 and Fig. 12, in order to realize the convenient adjustment operation of the pre-tightening force of the middle elastic pad; Between the upper surface and the flange of the locking sleeve 7.

In the specific operation, when the middle elastic pad is worn or there is a gap between the middle elastic pad and the backing plate 2 (or the foundation under the rail) due to other reasons, gaskets of different thicknesses can be set under the upper flange of the locking sleeve 7, and again Tighten the anchor bolt 5 to compress the middle elastic pad again and eliminate the gap. If it is necessary to adjust the preload of the middle elastic pad, also set gaskets of different thicknesses under the upper flange of the locking sleeve 7, and tighten the anchor spike again so that the middle elastic pad can obtain different preload.

In order to realize the convenient adjustment operation of the height of the fastener; preferably, in this embodiment, a height-adjusting backing plate may also be included, and the height-adjusting backing plate is arranged between the second elastic pad 8 and the backing plate 2, and/or is arranged on between the second elastic pad 8 and the track foundation 3 .

In the specific operation, the adjustment of the height of different fasteners can be realized by setting the height-adjusting backing plate on the upper surface or the lower surface of the second elastic pad 8, or the upper and lower surfaces at the same time; furthermore, by setting the height-adjusting backing plate of different thickness , the adjustment operation of the preset height can be realized.

As shown in FIG. 13 and FIG. 14 , in order to achieve a better insulation effect; preferably, in this embodiment, an insulating sleeve 11 may also be included, and the insulating sleeve 11 is arranged between the backing plate 2 and the locking sleeve 7 .

In the specific operation, through the setting of the above-mentioned insulating sleeve 11, a relatively stable insulating technical effect between the anchor bolt 5 and the backing plate 2 can be realized; It can also play a certain role of buffering and vibration reduction, and can further improve the operation stability of the fastener system.

Preferably, in this embodiment, at least two protruding structures 21 are provided on the lower surface of the above-mentioned backing plate 2 , and the protruding structures 21 are uniformly arranged on the lower surface of the backing plate 2 . In the specific operation, a plurality of raised structures 21 can be provided on the lower surface of the backing plate 2, and the plurality of raised structures 21 correspond to the grooves 31 on the track foundation 3 one by one, thereby greatly improving the connection between the two. stability.

In this embodiment, the structural form of the above-mentioned elastic bar 6 can be "e" type, can also be "w" type, and can also be other similar structural forms; At the corner position, the protruding structure 21 is set at another set of diagonal positions of the backing plate 2 , that is, there is no contact between the through hole 22 and the protruding structure 21 .

Embodiment two:

This embodiment provides a shoulder-type shock-absorbing fastener, the main structure is similar to the first embodiment, and also includes backing plate 2, anchor bolt 5, elastic strip 6, elastic strip seat and gauge block and other structures, the specific structure and For the connection relationship between them, please refer to the description of Embodiment 1. This embodiment aims to illustrate the difference between the two.

As shown in FIG. 15 and FIG. 16 , in this embodiment, the above-mentioned through hole 22 runs through the protruding structure 21 .

In the specific operation, the above-mentioned through hole 22 and the protruding structure 21 are arranged on the same position on the backing plate, that is, the above-mentioned through hole 22 penetrates the setting of the protruding structure 21, and the above-mentioned preferred setting can effectively reduce the total weight of the backing plate 2; The setting of the hollow through hole of the raised structure 21 can reduce the manufacturing cost of the raised structure 21, which has obvious beneficial effects.

Embodiment three:

This embodiment provides a shoulder-type shock-absorbing fastener, the main structure of which is similar to that of Embodiment 2, and also includes structures such as backing plate 2, anchor bolt 5, spring bar 6, spring bar seat and gauge block, and the specific structure and For the connection relationship between them, please refer to the description of Embodiment 1. This embodiment aims to illustrate the difference between the two.

As shown in FIG. 17 and FIG. 18 , in this embodiment, the buffer layer 32 and the embedded casing 9 may be integrated.

In the specific operation, the above-mentioned buffer layer 32 and the embedded sleeve 9 can be directly integrally formed, that is, directly formed during the manufacturing process; they can also be connected separately, that is, connected after being made separately; those skilled in the art , and the corresponding setting method can be selected according to the actual situation; after the buffer layer 32 is connected with the bushing as a whole, it can be pre-embedded into the track foundation 3 as a whole.

Embodiment four:

This embodiment provides a shoulder-type shock-absorbing fastener. The main structure is similar to that of Embodiment 1, and also includes structures such as backing plates, anchor bolts, elastic bars, elastic bar seats, and gauge blocks. For the connection relationship, please refer to the description of Embodiment 1. This embodiment aims to illustrate the difference between the two.

As shown in FIG. 19 , in this embodiment, the above-mentioned limit stop shoulder is arranged at the two side positions of the backing plate parallel to the track, and the above-mentioned limit stop shoulder can be the bent edge 12 of the backing plate; the limit stop shoulder A buffer layer 32 may also be provided between the groove of the track foundation, and the above-mentioned buffer layer 32 may be arranged in the groove of the track foundation, or on a limit shoulder, or at the same time on the groove and the limit stop. On the shoulder; the setting of the above-mentioned buffer layer 32 can also transmit the force on the backing plate to the track foundation.

In the specific operation, the above-mentioned track foundation can be provided with a larger groove to accommodate the whole backing plate and the two bent edges 12 on the edge of the backing plate; the above-mentioned two bent edges 12 can be closely attached to the side walls of the groove , which in turn can effectively limit the lateral displacement of the backing plate relative to the track foundation. It should be noted that the above-mentioned groove can be a groove provided on the track foundation, or a protrusion provided on the track foundation, as long as it has a limit surface that can match the bent edge 12 .

Embodiment five:

This embodiment provides a shoulder-type shock-absorbing fastener. The main structure is similar to that of Embodiment 1, and also includes structures such as backing plates, anchor bolts, elastic bars, elastic bar seats, and gauge blocks. For the connection relationship, please refer to the description of Embodiment 1. This embodiment aims to illustrate the difference between the two.

As shown in FIG. 20 and FIG. 21 , in this embodiment, the lower surface of the backing plate is provided with an annular groove surrounding the protruding structure, and the end of the buffer layer 32 extends into the annular groove.

In specific operation, the top end of the above-mentioned buffer layer 32 can be inserted into the sealing structure of the annular groove to effectively prevent external media such as sand, dust, and water from entering the interior of the fastener system. Wherein, if any impurity enters the groove on the track foundation, it will contact with the shoulder of the backing plate to prevent the backing plate from moving downward. However, the second elastic pad of the shock-absorbing fastener has a certain degree of elasticity. When the train is running, in order to achieve the purpose of reducing vibration and noise, the second elastic body often needs to be compressed, and the backing plate is displaced downward at the same time, which is normal. Design requirements. Therefore, the above-mentioned preferred sealing structure configuration can effectively prevent sundries from entering the groove of the track foundation, and can effectively ensure the operation stability of the fastener system.

In the description of this application, the terms "installation", "connection", "connection", "fixation" and so on should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integrated Connection; can be direct or indirect through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in this application In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Those skilled in the art should understand that although the implementation manners disclosed in the embodiments of the present invention are as above, the content described is only the implementation manners adopted to facilitate understanding of the embodiments of the present invention, and is not intended to limit the embodiments of the present invention. Any person skilled in the field of the embodiments of the present invention can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the embodiments of the present invention, but the embodiments of the present invention The scope of patent protection must still be subject to the scope defined in the appended claims.

Claims (10)

1. A shoulder type damping fastener, comprising backing plate and anchor bolt; It is characterized in that, The backing plate is provided with a through hole, and the anchor bolt penetrates the through hole to fix the backing plate on the track foundation, and at least two spring bar seats are arranged on the upper surface of the backing plate; The backing plate is provided with a limit shoulder for limiting the lateral displacement between the backing plate and the track foundation, and the limit stop shoulder is matched and connected with the groove provided on the track foundation. 2. The shoulder-type shock-absorbing fastener according to claim 1, characterized in that, The limiting shoulder is arranged on the lower surface of the backing plate; The limiting shoulder is set as a protruding structure, a buffer layer is arranged between the protruding structure and the groove, the buffer layer is arranged in the groove, and/or the protruding structure is provided superior. 3. The shoulder-type shock-absorbing fastener according to claim 1, characterized in that, The limit stop shoulder is arranged at two side positions of the backing plate parallel to the track; A buffer layer is arranged between the limiting shoulder and the groove; the buffer layer is arranged in the groove and/or on the limiting shoulder. 4. The shoulder-type damping fastener according to claim 1, 2 or 3, characterized in that, It also includes a first elastic pad and a second elastic pad, the first elastic pad is arranged on the upper surface of the backing plate, and the second elastic pad is arranged on the lower surface of the backing plate. 5. The shoulder type vibration-absorbing fastener according to claim 4, characterized in that, It also includes a locking sleeve, the locking sleeve is arranged in the through hole, and the locking sleeve has a flange that clamps the upper surface of the backing plate; The anchor bolt passes through the locking sleeve and is connected with the embedded casing in the track foundation. 6. The shoulder-type shock-absorbing fastener according to claim 5, characterized in that, An adjusting gasket is also included, and the adjusting gasket is arranged between the upper surface of the backing plate and the flange of the locking sleeve. 7. The shoulder-type shock-absorbing fastener according to claim 5, characterized in that, An insulating sleeve is also included, and the insulating sleeve is arranged between the backing plate and the locking sleeve. 8. The shoulder-type shock-absorbing fastener according to claim 4, characterized in that, It also includes a height-adjusting pad, and the height-adjusting pad is arranged between the second elastic pad and the pad, and/or between the second elastic pad and the track foundation. 9. The shoulder-type shock-absorbing fastener according to claim 2, characterized in that, The through hole runs through the protruding structure; at least two protruding structures are arranged on the lower surface of the backing plate, and the protruding structures are evenly distributed on the lower surface of the backing plate. 10. The shoulder-type shock-absorbing fastener according to claim 2, characterized in that, The lower surface of the backing plate is provided with an annular groove surrounding the protruding structure, and the end of the buffer layer extends into the annular groove.