CN205839490U - Double-layer vibration damping fastener - Google Patents

Abstract

This utility model provides the double-layer vibration damping fastener of a kind of field of urban rail, including: lower bolster, there are multiple cannular boss of up/down perforation, cannular boss medial wall is provided with ring boss, and lateral wall is provided with clamping part；Upper padding plate, is positioned at above lower bolster, and upper padding plate is provided with multiple through hole, and cannular boss is located in through hole, is folded with middle spring pad between upper padding plate and lower bolster, and the upper surface of upper padding plate is provided with cushion under rail；Multiple flexible clamp pieces, it has dead bolt, and flexible clamp piece is folded between cannular boss and through hole, and dead bolt is arranged in clamping part；Multiple double end railway spikes, the upper end of double end railway spike is provided with thread segment, and the lower end of double end railway spike is provided with lower thread segment, the middle part of double end railway spike is provided with shoulder ring, lower thread segment is located in cannular boss, and shoulder ring is connected to the top of ring boss, and upper thread segment is positioned at the outside of cannular boss.This utility model double-layer vibration damping fastener can reduce double end railway spike, and to cut off risk, regulation pretightning force convenient and realize pre-assembled.

Description

Double-layer vibration damping fastener

Technical field

This utility model relates to a kind of Damping fastening, is specifically related to the double-layer vibration damping button of a kind of field of urban rail Part.

Background technology

In recent years, along with the fast development of the City Rail Transit System with subway, inter-city passenger rail etc. as representative, delay effectively Having solved the nervous situation of urban transportation, and meanwhile, the life of people is also given in vibration that these modes of transportation are brought, sound pollution Producing lives brings greatly puzzlement.

Rail fastening is as the connection member between rail and sleeper, while playing fixing rail function, its vibration damping Decrease of noise functions is the most increasingly subject to people's attention, and has been proposed a series of steel with vibration and noise reducing function Rail fastener product.And in numerous Damping fastening products, detachable double-layer vibration damping fastener achieve two layers of elastomer vibration damping from And reach higher effectiveness in vibration suppression, and the dismounting and change of parts can be conveniently realized, therefore obtain extensive application, deeply Favored by market.

Detachable double-layer vibration damping fastener key point structurally is that the connection between upper padding plate, lower bolster is from lock side Formula, main flow uses top self-locking structure in the market, has different ways of realization, substantially think in this structure prior art Road is all the cannular boss arranging symmetry at lower bolster, and the upper padding plate corresponding with cannular boss position is provided with circular hole, group During the cannular boss of lower bolster embeds the circular hole of upper padding plate during dress, form lower bolster and the located lateral of upper padding plate is locked, finally The anchor spike of buckle will be cased with and screw in the nylon sleeve on sleeper through cannular boss, it is achieved upper padding plate, lower bolster vertical Locking.

It addition, each separable parts pre-assembled during in order to realize dispatching from the factory, existing the most different pre-group of prior art Dress mode, it is achieved the integration of parts during product export.The pre-assembled mode of one of which is by the hollow convex at lower bolster Being provided with the base plate adapter sleeve of dead bolt in gap between platform and the circular hole of upper padding plate, base plate adapter sleeve is arranged below dead bolt, Top is with flange, and it can rotate around cannular boss, and during after rotation, dead bolt snaps in the groove of cannular boss, base plate connects The upper flange of set is pressed on upper padding plate, thus is assembled into one by the parts of separate type；When needing dismounting, after removing railway spike Rotating bottom board adapter sleeve, the most removable base plate adapter sleeve, thus release parts and assemble；Another kind of pre-assembled mode is to exist respectively Arrange on the cannular boss of lower bolster and the corresponding circular hole of upper padding plate when the dead bolt of projection, upper padding plate and lower bolster assemble and pass through side Push away the mutual screens realizing dead bolt, thus parts are assembled into one；During dismounting, fix a backing plate, by another backing plate Reverse side pushes away, and releases the mutual screens of dead bolt, thus releases parts and assemble.

The Damping fastening of above-mentioned prior art, all can give full play to the vibration-damping function of two layers of elastomer, it is achieved higher subtracts The amount of shaking, is the most all capable of the convenient dismounting of product component simultaneously and changes.It addition, the most additionally add pad or class Like solving pretightning force deficiency and upper padding plate, the lower bolster separation problem that Damping fastening occurs in running after part. But while solving the problems referred to above, prior art there is also following deficiency:

(1) compared with the other types fastener in rail system, it is horizontal that above-mentioned prior art increases suffered by railway spike Shearing moment.Different from other types fastener, it is higher that position, face withheld by prior art railway spike, all lower bolster cannular boss it On, withholding a height increases about 40mm, and under identical Lateral Force, the arm of force increases, and the lateral shear moment of railway spike becomes Greatly, the stress suffered by railway spike increases, and in the case of not increasing railway spike diameter, there is certain potential safety hazard.

(2) pretightning force regulation difficulty, it is impossible to step-less adjustment.Detachable double-layer vibration damping fastener the later stage use during, Due to the permanent deformation of elastomer, the factor such as abrasion of aging and related components, it may appear that pretightning force is not enough, upper padding plate and under The problems such as backing plate separation, pretightning force is not enough or crosses conference causes the assembling rigidity of Damping fastening change occur, if assembling rigidity Too low, when train can be caused to pass through, steel rail dynamic deformation is excessive, jeopardizes traffic safety；If it is too high to assemble rigidity, impact is produced The damping property of product.Method of the prior art is to increase buckleing upper padding plate when railway spike is tightened by adding adjusting washer (disk) Pressure amount realizes increasing pretightning force, and the method needs additionally to increase parts when implementing, and the increments of pretightning force and spacer The thickness of sheet is relevant, can only realize staged regulation, and cannot realize step-less adjustment.It addition, prior art also cannot be convenient The method relying on regulation pretightning force regulates product rigidity.When this Damping fastening product uses at the scene, need to consider with common The connection problem of non-Damping fastening, it is to avoid circuit rigidity is undergone mutation.Originally can be realized by the method for regulation pretightning force Regulation rigidity, but due to prior art inconvenience in terms of regulation pretightning force, therefore stiffness tuning depends on greatly change elasticity The method of body formula or elastomer structure realizes, and while parts lack versatility, rigidity is the most also gradual.

(3) in another kind of prior art, it is achieved the pre-assembled needs of product rotates its base plate adapter sleeve, the end after rotation, is relied on In plate adapter sleeve bottom dead bolt and upper flange are respectively clamped into the cannular boss groove of lower bolster and upper padding plate upper surface, thus real Existing pre-assembled.And the machine-shaping of upper padding plate, lower bolster uses forging type to carry out at present, under normal process conditions, this Base plate adapter sleeve when the normal grade of tolerance of size is difficult to meet assembling product rotate needed for dimension precision requirement, often lead to The method crossing constantly regulation mould or polishing foundry goods completes to assemble, and causes assembling product inefficiency.It addition, sometimes rely on quite Though power can make base plate adapter sleeve be rotated in place by force, but cause base plate adapter sleeve and upper padding plate circular hole or lower bolster cannular boss Between local contact pressure excessive, affect the vertical freedom degree of upper padding plate, thus reduce effectiveness in vibration suppression, be likely to result in phase simultaneously Close parts stress to change.

Therefore, it is necessary to provide a kind of novel double-layer vibration damping fastener, overcome drawbacks described above.

Utility model content

The purpose of this utility model is to provide a kind of double-layer vibration damping fastener, uses double end railway spike to carry out pretension, its safety Property high, this double-layer vibration damping fastener can effectively solve the problem that railway spike lateral shear moment increases.

For reaching above-mentioned purpose, this utility model provides a kind of double-layer vibration damping fastener, including:

Lower bolster, it has multiple cannular boss of up/down perforation, and the medial wall of described cannular boss is provided with ring boss, institute The lateral wall stating cannular boss is provided with clamping part；

Upper padding plate, it is positioned at the top of described lower bolster, and described upper padding plate is provided with multiple through hole, and described cannular boss is worn It is located in described through hole, between described upper padding plate and described lower bolster, is folded with middle spring pad, the upper surface of described upper padding plate It is provided with cushion under rail；

Multiple flexible clamp pieces, described flexible clamp piece has dead bolt, and described flexible clamp piece is folded in described cannular boss and institute Stating between through hole, described dead bolt is arranged in described clamping part；

Multiple double end railway spikes, the upper end of described double end railway spike is provided with thread segment, and the lower end of described double end railway spike is provided with down Thread segment, the middle part of described double end railway spike is provided with shoulder ring, and described lower thread segment is located in described cannular boss, described shoulder Ring is connected to the top of described ring boss, and described upper thread segment is positioned at the outside of described cannular boss.

Double-layer vibration damping fastener as above, wherein, the middle part of described double end railway spike is additionally provided with nut block, described nut block It is positioned at the top of described shoulder ring.

Double-layer vibration damping fastener as above, wherein, described cannular boss is provided with slot to avoid, and described clamping part is buckle Groove, described buckle slot is positioned at the lower section of described slot to avoid, and described flexible clamp piece is elastic ferrule, and described dead bolt is located at described elasticity The sidewall of cutting ferrule, described dead bolt is fastened in described buckle slot.

Double-layer vibration damping fastener as above, wherein, the upper end of described elastic ferrule is provided with outward flange, at described dead bolt card Being located under the state in described buckle slot, described outward flange is connected on described upper padding plate.

Double-layer vibration damping fastener as above, wherein, described flexible clamp piece includes insulation sleeve and flexible collar, described elasticity Clip has connection ring and is arranged on the described dead bolt of described connection ring internal ring wall, and described flexible collar is worn by described dead bolt In described insulation sleeve, described connection ring is positioned at the upper end of described insulation sleeve；Described clamping part is that projection is at described cannular boss Multiple buckle projections of lateral wall, described dead bolt blocks mutually with multiple described buckle projections and sets.

Double-layer vibration damping fastener as above, wherein, the internal ring wall of described connection ring is diametrically provided with two described locks Tongue, the lateral wall of described cannular boss is diametrically provided with two described clamping parts.

Double-layer vibration damping fastener as above, wherein, the upper surface of described middle spring pad and described middle spring pad Lower surface is equipped with multiple elastic projection.

Double-layer vibration damping fastener as above, wherein, the upper end of described cannular boss is provided with spacing buckle, described limit buckle Plate is provided with limiting through hole, and described upper thread segment is located in described limiting through hole.

Double-layer vibration damping fastener as above, wherein, the upper thread segment of described double end railway spike is socketed with locking nut, described It is folded with packing ring between locking nut and described spacing buckle.

Double-layer vibration damping fastener as above, wherein, is folded with packing ring between described shoulder ring and described ring boss.

Compared with prior art, advantage of the present utility model is as follows:

1, double-layer vibration damping fastener of the present utility model, utilizes the fit structure of the ring boss of double end railway spike and cannular boss, Hinge structure reduces double end railway spike and withholds the height in face, thus reduces the risk of double end railway spike fracture；

2, double-layer vibration damping fastener of the present utility model, utilizes thread segment and the setting of lower thread segment on double end railway spike, coordinates Locking nut, it is achieved that the vertical locking to whole double-layer vibration damping fastener, can adjust by changing the moment of torsion of locking screw meanwhile Save the pretightning force of middle spring pad；

3, double-layer vibration damping fastener of the present utility model, by the structure of flexible clamp piece, utilizes the bullet of the dead bolt of flexible clamp piece Property deformation realize pre-assembled to double-layer vibration damping fastener, reduce the parts requirement to assembly precision.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme in this utility model embodiment, required in embodiment being described below Accompanying drawing to be used is briefly described, it should be apparent that, the accompanying drawing in describing below is only realities more of the present utility model Execute example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to these accompanying drawings Obtain other accompanying drawing.

Fig. 1 is the package assembly schematic diagram of the first embodiment of this utility model double-layer vibration damping fastener；

Fig. 2 is the lower bolster plate structure schematic diagram of the first embodiment of this utility model double-layer vibration damping fastener；

Fig. 3 is the lower bolster cannular boss structural representation of the first embodiment of this utility model double-layer vibration damping fastener；

Fig. 4 is the upper padding plate structural representation of the first embodiment of this utility model double-layer vibration damping fastener；

Fig. 5 is the flexible clamp piece structural representation of the first embodiment of this utility model double-layer vibration damping fastener；

Fig. 6 is the limit buckle plate structure schematic diagram of this utility model double-layer vibration damping fastener；

Fig. 7 is the double end railway spike structural representation of this utility model double-layer vibration damping fastener；

Fig. 8 is the flexible clamp piece of the second embodiment, upper padding plate, lower bolster and the centre of this utility model double-layer vibration damping fastener The structural representation that cushion assembles；

Fig. 9 is the lower bolster plate structure schematic diagram of the second embodiment of this utility model double-layer vibration damping fastener；

Figure 10 is the lower bolster cannular boss structural representation of the second embodiment of this utility model double-layer vibration damping fastener；

Figure 11 is the upper padding plate structural representation of the second embodiment of this utility model double-layer vibration damping fastener；

Figure 12 is the structural representation of the insulation sleeve of the flexible clamp piece of the second embodiment of this utility model double-layer vibration damping fastener Figure；

Figure 13 is the flexible collar structure signal of the flexible clamp piece of the second embodiment of this utility model double-layer vibration damping fastener Figure；

Figure 14 is the middle spring mat structure schematic diagram of this utility model double-layer vibration damping fastener；

Figure 15 is the cannular boss structural representation with the first tooth-shape structure of this utility model double-layer vibration damping fastener；

Figure 16 is the structural representation of the spacing buckle with the second tooth-shape structure of this utility model double-layer vibration damping fastener.

Drawing reference numeral illustrates:

1, lower bolster；11, cannular boss；110, clamping part；1101, buckle projection；1102, buckle projection groove；112, return Keep away groove；113, ring boss；114, connectivity slot；12, spacing hole；121, spacing ring fin；115, through hole；116, the first profile of tooth knot Structure；2, upper padding plate；21, through hole；22, dead bolt storage tank；23, spring holding part；231, spring accommodating hole；3, flexible clamp piece；31、 Elastic ferrule；311, outward flange；312, clearance channel；313, dead bolt；32, flexible collar group；321, insulation sleeve；3211, insulation sleeve Dead bolt storage tank；3212, outward flange；322, flexible collar；3221, ring is connected；4, spacing buckle；41, limiting through hole；42, Two tooth-shape structures；5, packing ring；6, middle spring pad；61, cannular boss spacing hole；62, spacing hole is coordinated；63, elastic projection；7、 Double end railway spike；71, the upper end of thread；72, nut portions；73, shoulder ring；74, lower thread segment；8, nylon sleeve；9, matrix；91, spiral shell Pit；14, metallic framework body；15, locking nut；16, packing ring；17, rail；18, cushion under rail；19, track gauge block；20, bullet Bar.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise The every other embodiment obtained, broadly falls into the scope of this utility model protection.

Referring to figs. 1 through shown in Figure 16, this utility model provides a kind of double-layer vibration damping fastener, under this double-layer vibration damping fastener includes Backing plate 1, upper padding plate 2, multiple flexible clamp piece 3, middle spring pad 6, multiple double end railway spike 7, wherein: lower bolster 1 has and passes through up and down Logical multiple cannular boss 11, cannular boss 11 medial wall is provided with ring boss 113, and the lateral wall of cannular boss 11 is provided with clamping part 110；Upper padding plate 2 is positioned at the top of lower bolster 1, and upper padding plate 2 is provided with multiple through hole 21, and cannular boss 11 is located in through hole 21 In, it being folded with middle spring pad 6 between upper padding plate 2 and lower bolster 1, the upper surface of upper padding plate 2 is provided with cushion 18 under rail；Elastic Fastener 3 has dead bolt 313, and flexible clamp piece 3 is folded between cannular boss 11 and through hole 21, and dead bolt 313 is arranged in clamping part 110；The upper end of double end railway spike 7 is provided with thread segment 71, and its lower end is provided with lower thread segment 74, is provided with shoulder ring 73 in the middle part of it, under Thread segment 74 is arranged in cannular boss 11, and shoulder ring 73 is connected to the top of ring boss 113, and upper thread segment 71 is positioned at hollow convex The outside of platform 11.

Specifically, as shown in Figures 2 and 3, lower bolster 1 is rectangle tabular, the upper surface of lower bolster 1 be convexly equipped with multiple in Empty boss 11, in the present embodiment, the upper surface of lower bolster 1 is convexly equipped with two cannular boss 11, and two cannular boss 11 are respectively Being positioned at a diagonal angle of lower bolster 1, each cannular boss 11 is provided with a clamping part 110；Right at another of lower bolster 1 Being respectively equipped with the spacing hole 12 of two up/down perforations at angle, in this utility model, the upper surface at lower bolster 1 is provided with two limits Position ring fin 121, these two spacing ring fins 121 lay respectively at the outer edge of two spacing holes 12.

As shown in Figure 4, upper padding plate 2 is identical with the shape of lower bolster 1, and it is also rectangle tabular, and upper padding plate 2 is provided with many Individual through hole 21, in the present embodiment, upper padding plate 2 is provided with two through holes 21, and two through holes 21 lay respectively at of upper padding plate 2 At diagonal angle；Further, the upper surface at upper padding plate 2 is provided with two spring holding parts 23, and two spring holding parts 23 set respectively Put at another diagonal angle of the upper surface of upper padding plate 2, and spring holding part 23 is provided with spring accommodating hole 231；It addition, in this reality Executing example, the inwall in through hole 21 is provided with dead bolt storage tank 22, when the cannular boss 11 of lower bolster 1 is located in the through hole of upper padding plate 2 Time in 21, this dead bolt storage tank 22 is the most relative with the clamping part 110 of cannular boss 11, and this dead bolt storage tank 22 can be dead bolt The elastic deformation of 313 provides space.

As shown in Fig. 1 and Figure 14, middle spring pad 6 is folded between upper padding plate 2 and lower bolster 1, the one of middle spring pad 6 Individual diagonal angle is provided with two cannular boss spacing holes 61, is provided with two and coordinates spacing hole 62 at its another diagonal angle.Such as Figure 14 institute Show, coordinate spacing hole 62 by the high temperature vulcanized metallic framework body 14 that is bonded with, specifically, in one embodiment, metallic framework body 14 are bonded in the inner peripheral wall surface coordinating spacing hole 62；Or, in another embodiment, this metallic framework body 14 is adhered to coordinate The inside of the internal perisporium of spacing hole 62.When middle spring pad 6 assembles with lower bolster 1, cannular boss spacing hole 61 overlaps Being located on cannular boss 11, outside the spacing ring fin 121 of the spacing hole 12 that metallic framework body 14 is sheathed on lower bolster 1, this is joined Close spacing hole 62 and can play the effect that middle spring pad 6 is fixed on lower bolster 1；Further, at the upper surface of upper padding plate 2 Being additionally provided with cushion 18 under rail, rail 17 is fixedly installed the top descending cushion 18 in-orbit, cushion 18 and middle bullet under this rail Property pad 6 can play damping effect, its can well absorb rail 17 produce noise and vibration, it can also be ensured that the peace of train Row for the national games.In this utility model, what the upper surface of this middle spring pad 6 and the lower surface of middle spring pad 6 were all spaced sets There is multiple elastic projection 63.It addition, be also provided with elastic projection on the upper surface of cushion 18 and its lower surface under rail (in figure not Mark), these elastic projections, when by ambient pressure effect, can be deformed, and effectively absorbs vibration, middle spring pad 6 Jointly act on cushion under rail 18, reach double-layer vibration damping effect.

As it is shown in figure 5, in the first embodiment of flexible clamp piece 3, flexible clamp piece 3 is elastic ferrule 31, elastic ferrule 31 For straight-flanked ring, the sidewall of elastic ferrule 31 is provided with a dead bolt 313, this dead bolt 313 be can relative resilient cutting ferrule 31 sidewall to Interior or outwards elastic deformation strip plate body, is formed with two gaps between both sides and the sidewall of elastic ferrule 31 of dead bolt 313 Groove 312, the upper end of elastic ferrule 31 is additionally provided with outward flange 311, is fastened on the card of the cannular boss 11 of lower bolster 1 at dead bolt 313 Under state in button portion 110, this outward flange 311 is connected on upper padding plate 2.

Specifically, as shown in Figures 2 and 3 the clamping part, in the first embodiment of lower bolster 1, on this cannular boss 11 110 is buckle slot, and this buckle slot is to be formed at the groove on cannular boss 11 lateral wall or through slot；Further, this underlay Being additionally provided with slot to avoid 112 on the cannular boss 11 of plate 1, buckle slot is positioned at the lower section of slot to avoid 112, the bottom land shape of slot to avoid 112 The connectivity slot 114 that Cheng Youyu buckle slot is through, the width of connectivity slot 114 is less than width and the width of buckle slot of slot to avoid 112.

Refering to shown in Fig. 1, in an assembling process, upper padding plate 2 is arranged on the top of lower bolster 1, now, in lower bolster 1 Empty boss 11 is located in the through hole 21 corresponding with upper padding plate 2 just, is folded with middle spring between upper padding plate 2 and lower bolster 1 Pad 6；The buckle slot of this cannular boss 11 is relative with the dead bolt storage tank 22 of through hole 21 inwall of upper padding plate 2；Elastic card is being installed When overlapping 31, from the top of upper padding plate 2, elastic ferrule 31 is inserted the gap between cannular boss 11 and through hole 21, now dead bolt The free end of 313 can fall along slot to avoid 112, when the free end of dead bolt 313 props up the bottom land of slot to avoid 112, dead bolt 313 to Outside sweep deforms, and enters in dead bolt storage tank 22, now continues to compress downwards elastic ferrule 31, the free end meeting of dead bolt 313 Snap in buckle slot.Meanwhile, the outward flange 311 of elastic ferrule 31 can be connected on upper padding plate 2.

When needs dismounting elastic ferrule 31, use elongate rod to enter connectivity slot 114 from slot to avoid 112, enter back into buckle Groove, elongate rod withstands the free end of dead bolt 313, makes dead bolt 313 free end generation elastic deformation, and the free end of dead bolt 313 is outside Bending, and stretch in dead bolt storage tank 22, at this moment, dead bolt 313 separates with buckle slot, and buckle releases, and above carries and takes out elastic card Set 31.

According to another embodiment of the present utility model, as shown in Fig. 8, Figure 12 and Figure 13, in the second reality of flexible clamp piece 3 Executing in example, flexible clamp piece 3 is flexible collar group 32, and this flexible collar group 32 includes insulation sleeve 321 and flexible collar 322, this bullet Property clip 322 have and connect ring 3221 and be arranged on the dead bolt 313 connecting ring 3221 internal ring wall, this flexible collar 322 is by lock Tongue 313 is located in insulation sleeve 321, and this connection ring 3221 is positioned at the upper end of insulation sleeve 321；This clamping part 110 for projection in Multiple buckle projections 1101 of empty boss 11 lateral wall, dead bolt 313 sets with multiple buckle projection 1101 phase cards.At the present embodiment In, the internal ring wall of this connection ring 3221 is diametrically provided with two dead bolts 313, and the lateral wall of this cannular boss 11 diametrically sets There are two clamping parts 110.Further, in the present embodiment, as shown in figure 11, through hole 21 inwall of upper padding plate 2 is no longer arranged Dead bolt storage tank, this through hole 21 can be a unthreaded hole.

Specifically, as shown in figure 13, flexible collar 322 has circular connection ring 3221 and is arranged on connection ring 3221 Dead bolt 313 on internal ring wall, in the present embodiment, is diametrically provided with two relative dead bolts on the internal ring wall connecting ring 3221 313.Further, as shown in figure 12, insulation sleeve 321 is substantially in cylinder-shaped, and its upper end is provided with outward flange 3212, insulation sleeve 321 Medial wall be provided with two insulation sleeve dead bolt storage tanks 3211 diametrically, these two insulation sleeve dead bolt storage tanks 3211 are used for Deformation for two dead bolts 313 provides space.When flexible collar 322 is inserted in insulation sleeve 321, two of flexible collar 322 Dead bolt 313 is respectively protruding in two insulation sleeve dead bolt storage tanks 3211 of insulation sleeve 321, now, and the connection ring of flexible collar 322 3221 outward flange 3212 tops being connected to insulation sleeve 321.

As shown in Figure 8, in an assembling process, upper padding plate 2 is arranged on the top of lower bolster 1, now, the hollow of lower bolster 1 Boss 11 is located in the through hole 21 corresponding with upper padding plate 2 just, is folded with middle spring pad between upper padding plate 2 and lower bolster 1 6；When installing flexible collar group 32, first from the top of upper padding plate 2, insulation sleeve 321 is inserted between cannular boss 11 and through hole 21 Gap, the most again flexible collar 322 is inserted in insulation sleeve 321, now the freedom of two dead bolts 313 of flexible collar 322 End can fall along the two of insulation sleeve 321 insulation sleeve dead bolt storage tank 3211, until the free end of two dead bolts 313 respectively with The two pairs of buckle projection 1101 phase cards arranged in two opposite side walls on cannular boss 11 set.It is fastened on two buckles at dead bolt 313 Under the state of projection 1101, the connection ring 3221 of flexible collar 322 can be connected on the outward flange 3212 of insulation sleeve 321, and outer Flange 3212 can be connected on upper padding plate 2.

Further, the buckle projection groove between two buckle projections 1101 on cannular boss 11 1 sidewall 1102, can be used for providing space when dismantling this flexible collar group 32 for extracting tool.That is, when needing from double-layer vibration damping fastener During this flexible collar group 32 of upper dismounting, use two elongate rod to stretch into the buckle projection groove 1102 of cannular boss 11 both sides simultaneously, Withstanding dead bolt 313 by elongate rod and bring it about elastic deformation, the free end of dead bolt 313 is bent outwardly, due to insulation sleeve 321 The design of insulation sleeve dead bolt storage tank 3211, the flexural deformation for dead bolt 313 provides space, now, pulls up flexible collar 322, dead bolt 313 separates with buckle projection 1101, and buckle releases；Afterwards, insulation sleeve 321 is taken out.In this embodiment, use Dead bolt 313 and two buckle projections 1101 carry out buckle, and are respectively equipped with two groups of clamping parts 110 on cannular boss 11, this Very firmly and stable, and dead bolt 313 can occur elastic deformation to the pre-assembled mode that buckle combines, for coordinate with it zero The required precision of parts is relatively low, so, processing cost and the assembly precision of whole parts have declined.

As shown in Figure 1 and Figure 7, the upper end of double end railway spike 7 is provided with thread segment 71, and its lower end is provided with lower thread segment 74, its Middle part is provided with shoulder ring 73.Shoulder ring 73 is projection annular boss in the middle part of the screw rod of double end railway spike 7, and shoulder ring 73 diameter is little In the internal diameter of cannular boss 11, and the diameter of the through hole 115 more than ring boss 113.In a preferred embodiment, shoulder ring 73 Top is also provided with nut portions 72, and nut portions 72 outward flange is regular polygon.Lower bolster 1, middle spring pad 6 and upper padding plate 2 After assembling successively, it is placed on matrix 9, now the ring boss 113 of the cannular boss 11 on lower bolster 1 and the screw thread on matrix 9 Hole 91 is oppositely arranged, and is provided with nylon sleeve 8 in screwed hole 91, by double end railway spike 7 from the cannular boss inserted above 11 of upper padding plate 2 Through hole 115 in, and spiral screws in nylon sleeve 8, until the shoulder ring 73 of double end railway spike 7 is convex with the ring in cannular boss 11 The upper surface laminating of platform 113, in the process, it is possible to use the instruments such as sleeve, stretches into cannular boss 11, screws double end railway spike 7 Nut portions 72, reach double end railway spike 7 is screwed in the purpose in nylon sleeve 8 by this nut portions 72.Owing to shoulder ring 73 is straight Connect on the ring boss 113 withheld in cannular boss 11, that is, the face of withholding of double end railway spike 7 is arranged close to lower bolster 1, therefore Hinge structure, this utility model reduces railway spike and withholds the height in face, reduces the cross shear of double end railway spike 7, anti- Only double end railway spike 7 ruptures because of overload.

Further, in this utility model, the upper end of cannular boss 11 is provided with spacing buckle 4, and spacing buckle 4 is annulus Shape plate body, this spacing buckle 4 is provided with limiting through hole 41, and the upper thread segment 71 of double end railway spike 7 is located in this limiting through hole 41. Specifically, being buckled on cannular boss 11 by spacing buckle 4, the upper thread segment 71 of double end railway spike 7, will locking through limiting through hole 41 Nut 15 is screwed to the upper thread segment 71 of double end railway spike 7, and locking nut 15 abuts with spacing buckle 4 after screwing, and can limit bullet Property fastener 3 play up and down, improve the stability connected between parts.By adjusting the moment of torsion of locking nut 15, it is right to realize The regulation of the pretightning force of middle spring pad 6, and electrodeless regulation can be realized.

Optionally, as shown in Figure 15 and Figure 16, the lower surface of spacing buckle 4 has the second tooth-shape structure 42, cannular boss 11 upper surfaces have the first tooth-shape structure 116, and this second tooth-shape structure 42 can be to be arranged on the multiple of spacing buckle 4 lower surface to put down First groove of row arrangement, this first tooth-shape structure 116 can be arranged on cannular boss 11 upper surface multiple arranged in parallel Second groove, multiple first grooves and multiple second fit depressions, the i.e. first tooth-shape structure 116 and the second tooth-shape structure 42 phase It is clasped mutually.This being clasped can make limit buckle plate 4 more firmly match with cannular boss 11, prevents lower bolster Relative displacement between 1 and upper padding plate 2.

Further, in an embodiment of the present utility model, as it is shown in figure 1, the bottom of locking nut 15 and limit buckle Being folded with packing ring 5 between plate 4, packing ring 5 can be elastic washer；It addition, at the shoulder ring 73 of double end railway spike 7 and cannular boss 11 Ring boss 113 between also can be folded with packing ring 16, packing ring 16 can also be elastic washer.Packing ring 5 and packing ring 16 can play The locking effect with protection screw thread.

Further, it is located under rail above cushion 18 as it is shown in figure 1, rail 17 is supported by track gauge block 19, cushion under rail 18 are laid on upper padding plate 2, and they are between two spring holding parts 23 of upper padding plate 2 both sides；Track gauge block 19 is strip steel Block, its top is provided with groove (not marking in figure)；Spring 20 is curved steel bar, such as, can be e type spring, by rustless steel Making, one end of spring 20 wears in spring accommodating hole 231, and its other end is pressed on the groove on track gauge block 19 top.Rail The fixation procedure of 17 is as follows: arrange cushion 18 under rail at upper padding plate 2 upper surface, and rail 17 is pressed under rail on cushion 18, and two Individual track gauge block 19 is separately positioned on two spring holding parts 23 near one end of rail 17, and the lower end, side of track gauge block 19 is pressed in ferrum On rail 17 pedestal, wearing in spring accommodating hole 231 by one end of e type spring 20, its other end is pressed in track gauge block 19 opposite side In the groove of upper end, afterwards, 7 times thread segments 74 of double end railway spike being screwed in nylon sleeve 8, rail 17 is fixed by track gauge block 19. Under rail, cushion 18 and middle spring pad 6 constitute double-layer vibration damping pad, and effect of vibration and noise reduction is good.

Double-layer vibration damping fastener of the present utility model, utilizes the cooperation knot of the ring boss 113 of double end railway spike 7 and cannular boss 11 Structure, hinge structure reduces double end railway spike 7 and withholds the height in face, thus reduces the risk of double end railway spike 7 fracture.

Double-layer vibration damping fastener of the present utility model, utilizes thread segment 71 and the setting of lower thread segment 74 on double end railway spike 7, joins Close locking nut 15, it is achieved that the vertical locking to whole double-layer vibration damping fastener, meanwhile, by changing the moment of torsion of locking nut 15 The pretightning force of middle spring pad 6 can be regulated.

Double-layer vibration damping fastener of the present utility model, by the structure of flexible clamp piece 3, utilizes the dead bolt 313 of flexible clamp piece 3 Elastic deformation realizes pre-assembled to double-layer vibration damping fastener, reduces the parts requirement to assembly precision.

The foregoing is only the schematic detailed description of the invention of this utility model, be not limited to model of the present utility model Enclose.Any those of ordinary skill in the art, done by the premise of without departing from design of the present utility model and principle etc. With change and amendment, the scope of this utility model protection all should be belonged to.

Claims (10)

1. a double-layer vibration damping fastener, it is characterised in that described double-layer vibration damping fastener includes:

Lower bolster, it has multiple cannular boss of up/down perforation, and the medial wall of described cannular boss is provided with ring boss, described in The lateral wall of empty boss is provided with clamping part；

Upper padding plate, it is positioned at the top of described lower bolster, and described upper padding plate is provided with multiple through hole, and described cannular boss is located in In described through hole, being folded with middle spring pad between described upper padding plate and described lower bolster, the upper surface of described upper padding plate is provided with Cushion under rail；

Multiple flexible clamp pieces, described flexible clamp piece has dead bolt, and it is logical with described that described flexible clamp piece is folded in described cannular boss Between hole, described dead bolt is arranged in described clamping part；

Multiple double end railway spikes, the upper end of described double end railway spike is provided with thread segment, and the lower end of described double end railway spike is provided with lower screw thread Section, the middle part of described double end railway spike is provided with shoulder ring, and described lower thread segment is located in described cannular boss, and described shoulder ring supports Being connected on the top of described ring boss, described upper thread segment is positioned at the outside of described cannular boss.

Double-layer vibration damping fastener the most according to claim 1, it is characterised in that the middle part of described double end railway spike is additionally provided with nut Block, described nut block is positioned at the top of described shoulder ring.

Double-layer vibration damping fastener the most according to claim 1, it is characterised in that described cannular boss is provided with slot to avoid, institute Stating clamping part is buckle slot, and described buckle slot is positioned at the lower section of described slot to avoid, and described flexible clamp piece is elastic ferrule, described lock Tongue is located at the sidewall of described elastic ferrule, and described dead bolt is fastened in described buckle slot.

Double-layer vibration damping fastener the most according to claim 3, it is characterised in that the upper end of described elastic ferrule is provided with evagination Edge, when described dead bolt is fastened in described buckle slot, described outward flange is connected on described upper padding plate.

Double-layer vibration damping fastener the most according to claim 1, it is characterised in that described flexible clamp piece includes insulation sleeve and elasticity Clip, described flexible collar has connection ring and is arranged on the described dead bolt of described connection ring internal ring wall, and described flexible collar is led to Crossing described dead bolt to be located in described insulation sleeve, described connection ring is positioned at the upper end of described insulation sleeve；Described clamping part is projection At multiple buckle projections of described cannular boss lateral wall, described dead bolt blocks mutually with multiple described buckle projections and sets.

Double-layer vibration damping fastener the most according to claim 5, it is characterised in that the internal ring wall of described connection ring diametrically sets Having two described dead bolts, the lateral wall of described cannular boss is diametrically provided with two described clamping parts.

Double-layer vibration damping fastener the most according to claim 1, it is characterised in that the upper surface of described middle spring pad and described The lower surface of middle spring pad is equipped with multiple elastic projection.

Double-layer vibration damping fastener the most according to claim 1, it is characterised in that the upper end of described cannular boss is provided with limit buckle Plate, described spacing buckle is provided with limiting through hole, and described upper thread segment is located in described limiting through hole.

Double-layer vibration damping fastener the most according to claim 8, it is characterised in that the upper thread segment of described double end railway spike is socketed with Locking nut, is folded with packing ring between described locking nut and described spacing buckle.

Double-layer vibration damping fastener the most according to claim 1, it is characterised in that between described shoulder ring and described ring boss It is folded with packing ring.