CN215947755U - High-grade vibration reduction fastener for urban rail transit rails - Google Patents
High-grade vibration reduction fastener for urban rail transit rails Download PDFInfo
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- CN215947755U CN215947755U CN202122357808.3U CN202122357808U CN215947755U CN 215947755 U CN215947755 U CN 215947755U CN 202122357808 U CN202122357808 U CN 202122357808U CN 215947755 U CN215947755 U CN 215947755U
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Abstract
A high-grade vibration damping fastener for urban rail transit rails comprises a rail lower pad, an upper iron base plate, a middle vibration damping pad, a vibration isolation plate, a lower iron base plate, an insulation coupling base plate and a fixing device; the lower rail pad, the upper iron base plate, the middle vibration damping pad, the vibration isolation plate, the lower plate vibration damping pad, the lower iron base plate and the insulating coupling base plate are arranged layer by layer from top to bottom; the utility model has the beneficial effects that: the lower iron base plate of the device adopts an integrated structure, so that the transverse stability of the fastener is improved; the three layers of elastic base plates are adopted, so that the fastener achieves a better vibration reduction effect; the adoption of the adjusting of the nut of the pre-tightening bolt system greatly improves the assembly efficiency of the fastener and is very convenient for on-site installation and maintenance; through setting up drainage structures, not only can guarantee like this that the harm that the inside part of device can not take place the erosion, also increased the friction effect between each part of device simultaneously, the device's of assurance reliability in use.
Description
Technical Field
The utility model relates to the technical field of relevant equipment of rail transit, in particular to a high-grade vibration damping fastener for urban rail transit rails.
Background
In the field of urban rail transit, double-deck damping fasteners are the most common medium damping. Along with the society to the vibration damping noise reduction attach increasing day by day, the track market has had higher damping performance demand to the vibration damping fastener. The damping performance of the fastener is directly related to the vertical rigidity of the fastener, and the lower the rigidity is, the better the damping performance is. The steel rail is subjected to the double effects of the vertical load and the transverse load of the wheel, the transverse stability of the steel rail is indirectly reduced due to the reduction of the vertical rigidity of the fastener, and the conventional double-layer vibration-damping fastener cannot meet the double requirements on vibration-damping performance and stability; in addition, along with the operation of putting into the circuit, the damping unit (mainly refer to middle damping pad or damping pad under the board) will take place compression permanent deformation to a certain extent, and this will lead to the pretightning force between the upper and lower iron tie plate of double-deck damping fastener to reduce or do not have the pretightning force, is unfavorable for the stability of fastener on the one hand, and the pretightning force disappears between the upper and lower iron tie plate on the other hand, can lead to the upper iron tie plate to receive impact load's effect, and is unfavorable for the intensity security of fastener. The existing double-layer nonlinear (or high-grade) vibration reduction fastener in the market generally adopts the structure of the self-locking connecting sleeve to realize the preassembly of the fastener, the pretightening force of the fastener needs to be adjusted by methods such as adding a gasket, in addition, the fastener transversely comprises an upper iron base plate and the self-locking connecting sleeve, the self-locking connecting sleeve is matched with a lower iron base plate, in order to ensure the normal assembly and disassembly of the fastener, a certain fit clearance is reserved between the three, and the transverse stability of the fastener is relatively poor.
In addition, the fastener is at operating condition, go up the relative lower iron tie plate of iron tie plate and take place vertical and horizontal displacement, lead to going up the iron tie plate, take place the friction of continuation between auto-lock adapter sleeve and the lower iron tie plate, and the auto-lock adapter sleeve has generally all adopted the plastics material, through a period of time, serious wearing and tearing will take place for the auto-lock adapter sleeve, this will lead to upper and lower iron tie plate and auto-lock adapter sleeve three between the fit clearance further enlarge, thereby seriously reduce the lateral stability of fastener, and then influence the comfort and the security of train operation.
The existing high-grade vibration reduction fastener in the market generally adopts a non-integrated structure for a lower iron base plate, and two independent supporting columns are used for restraining an upper iron base plate. Thus, on the one hand, two independent support columns are not connected into a whole, and are not restricted with each other, so that the stability of the fastener is poor. On the other hand, the acting force of the bolt is completely concentrated at the bottom of the supporting column, and the area of the bottom of the supporting column is too small compared with that of the integrated lower iron base plate, so that the problem of stress concentration is easily caused, and the strength safety of the supporting column and the insulating coupling base plate is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a vibration damping fastener which has an obvious vibration damping effect, is stable to use and can enhance the vibration damping effect through pre-tightening, such as urban rail transit rails and the like.
The utility model is realized by the following technical scheme: a high-grade vibration damping fastener for urban rail transit rails comprises a rail lower pad, an upper iron base plate, a middle vibration damping pad, a vibration isolation plate, a lower iron base plate, an insulation coupling base plate and a fixing device; the lower rail pad, the upper iron base plate, the middle vibration damping pad, the vibration isolation plate, the lower plate vibration damping pad, the lower iron base plate and the insulating coupling base plate are arranged layer by layer from top to bottom;
the lower rail pad is a rectangular rubber pad, and the front end and the rear end of the lower rail pad are provided with downward bending structures;
the upper iron base plate is a rectangular plate, and mounting holes with circular hollow structures are formed in diagonal positions;
the middle vibration damping pad is a rectangular plate with the same shape as the upper iron base plate, and reserved holes of a circular hollow structure corresponding to the mounting holes are arranged at the diagonal positions;
the vibration isolation plate is a plate corresponding to the shape of the mounting groove on the lower iron base plate;
the lower plate vibration damping pad is a rubber pad with the same shape as the vibration isolation plate and is arranged in the mounting groove;
the lower iron base plate is a plate with the same shape as the upper iron base plate, mounting columns are arranged at the diagonal positions of the lower iron base plate and correspond to the mounting holes, the middle of each mounting column is of a hollow cylindrical structure, and the lower iron base plate is provided with a mounting groove of an invagination structure;
the insulating coupling base plate is of a structure corresponding to the shape of the lower iron base plate;
the upper iron backing plate is characterized in that a fixing device is arranged at the diagonal position of the mounting hole, the fixing device comprises a fixing seat, a limiting groove, a buckling groove, a T-shaped bolt, a fixing nut, a fixed elastic strip and a gauge block, an arc-shaped limiting groove is formed in the outer side of the top of the fixing seat, the buckling groove is formed in the inner side of the fixing seat, the lower end of the T-shaped bolt is buckled in the buckling groove, the fixed elastic strip penetrates through the T-shaped bolt and the outer side of the fixed elastic strip to be fixed in the limiting groove, the inner lower portion of the fixed elastic strip is in contact with the gauge block, the gauge block is of an L-shaped structure, the fixing nut is fixed above the T-shaped bolt, the gauge block is tightly pressed through screwing the fixing nut, and the rail is fixed by the gauge blocks at two sides of the fixing device.
Preferably, the inside construction bolt that sets up of erection column, construction bolt run through the erection column, the construction bolt below set up the bolt bushing, the construction bolt upper end set up the mounting pad through with last iron backing plate intermediate position, the bolt bushing set up in insulating coupling backing plate below, the bolt bushing internal thread screw thread setting that corresponds construction bolt, the inside diameter of running through that the bolt bushing external diameter is greater than the erection column, the bolt bushing outer edge hug closely the below of insulating coupling backing plate.
Furthermore, a spring washer is arranged between the top of the mounting bolt and the mounting gasket.
Furthermore, the outer side of the bolt sleeve is provided with mounting threads.
Preferably, a drain hole is formed in the mounting groove, the drain hole penetrates through the lower iron base plate, a plate drain hole is formed in the vibration isolation plate corresponding to the drain hole, and a pad drain hole is formed in the vibration isolation pad corresponding to the drain hole.
Furthermore, a pad drainage groove with an invagination structure is arranged at a drainage port below the lower iron base plate.
Preferably, the bolt drainage channel of the invagination structure is arranged at the position of the mounting column below the lower iron base plate.
Preferably, the corresponding positions of the upper iron base plate, the middle vibration damping pad and the lower iron base plate are provided with pre-tightening bolt holes penetrating through the structure, pre-tightening bolts are arranged in the pre-tightening bolt holes, and pre-tightening nuts are fixed above the pre-tightening bolts.
Furthermore, a pre-tightening bolt groove of an invagination structure is arranged below the lower iron base plate.
Preferably, the installation frame is arranged around the installation groove.
The utility model has the beneficial effects that: the utility model provides a high-grade vibration damping fastener system, which mainly comprises an upper iron base plate, a lower iron base plate, a middle vibration damping pad, a lower rail vibration damping pad, a lower plate vibration damping pad, a middle vibration isolation plate, an insulation and insulation coupling base plate, a cover plate, a pre-tightening bolt system and the like.
The lower iron base plate of the device adopts an integrated structure, and the upper iron base plate and the lower iron base plate are in direct contact, so that the transverse matching quantity of parts of the fastener is reduced, and the matching position adopts precision machining, so that the transverse stability of the fastener is improved.
This device adopts three-layer elastic backing plate (middle damping pad, damping pad under the rail and damping pad under the board), has realized the lower vertical rigidity of fastener, makes the fastener reach better damping effect.
This device adopts the pretension bolt system nut of adjustment to realize the pre-assembling of fastener, dismantles and adjust the pretightning force between the upper and lower iron tie plate, and this fastener installation, dismantlement and adjustment easy operation do not need complicated or professional equipment, adjustment tool, have greatly improved the packaging efficiency of fastener and very make things convenient for on-the-spot installation to maintain.
This device can guarantee to appear precipitation or because the accident causes the device submergence like the aquatic after, after the water level descends, the hydroenergy in mounting groove and the erection column is fast discharged, not only can guarantee like this that the inside part of device can not take place the harm of erosion, has also increased the friction effect between each part of device simultaneously, the use reliability of the device of assurance.
The beneficial effect of this device still lies in:
(1) high stability and high vibration damping effect
The device adopts three layers of elastic base plates, namely a nonlinear high-torsion-resistance rubber base plate, which has the nonlinear characteristics of low load, low rigidity and high load and high rigidity, and the rubber base plate starts to work from no load without being influenced by bolt fastening force, thereby fully utilizing the elasticity of rubber, obtaining low dynamic rigidity to the maximum extent and having good vibration and noise reduction effects. The upper and lower iron backing plates of the fastener are in direct contact without a connecting sleeve structure, the number of transverse matching between the upper and lower iron backing plates is reduced, the matching area of the upper and lower iron backing plates adopts a precision machining mode, the matching gap between the upper and lower iron backing plates is extremely low, the restraint of the lower iron backing plate of the fastener on the upper iron backing plate is effectively enhanced, and the transverse stability of the fastener is improved. In addition, the lower iron base plate of the fastener is of an integrated non-through hollow structure, and has better safety and stability compared with high-level vibration reduction fasteners which adopt support column structures or through hollow structures on the market.
(2) Low shear bottom plate connection structure design
The lower iron base plate of the device is only provided with a layer of low-density polyethylene base plate, namely an insulation coupling base plate, the base plate only plays a coupling role in rigid contact between the lower iron base plate and the top surface of the sleeper, the rigidity of the base plate is high, and the base plate is not an elastic providing element. Deformation is extremely small when the load is applied, most of transverse shearing force is offset by the friction force among the coupling base plate, the iron base plate and the top surface of the sleeper, the shearing force borne by the spike is effectively reduced, and the service life and the safety of the spike are improved.
(3) Design of height adjustment capability and distance adjustment capability
In order to overcome the defects of unsmooth track caused by foundation engineering construction errors, bridge creep and upwarp, uneven settlement of piers, uneven settlement of roadbeds and the like, the fastener system is required to have great capacity of adjusting the height, the left position and the right position of a steel rail. Especially, the adjustment capability of the track is almost completely realized by the fastener, and the height adjustment and the distance adjustment capability of the fastener are very critical; the device adjusts the distance through the track gauge block and the cover plate, and can realize the track gauge adjustment amount which is not less than-12 to +8mm to the maximum extent; the heightening is realized by adding the heightening base plate under the rail or the fastener, the heightening amount of 0-30 mm or (-4- +26) mm can be achieved, and the arrangement can completely meet the laying requirement of the line.
Drawings
Fig. 1 is a schematic view of an overall device unsealing structure of a high-grade vibration damping fastener for urban rail transit rails.
Fig. 2 is a schematic structural view of an overall device of a high-grade vibration damping fastener for urban rail transit rails.
Fig. 3 is a schematic view of a partial cross-sectional structure of an integral device of a high-grade vibration damping fastener for urban rail transit rails.
Fig. 4 is a schematic side view of an overall device of a high-grade vibration damping fastener for urban rail transit rails.
Fig. 5 is a schematic structural diagram of an upper iron base plate of a high-grade vibration damping fastener for urban rail transit rails.
Fig. 6 is a schematic structural diagram of a vibration isolation plate of a high-grade vibration-absorbing fastener for an urban rail transit track.
Fig. 7 is a schematic view of a lower iron backing plate structure and a back surface of a high-grade vibration-damping fastener for urban rail transit rails.
Fig. 8 is a schematic structural view of an under-rail pad of a high-grade vibration-damping fastener for urban rail transit rails.
Fig. 9 is a schematic structural diagram of a middle damping pad of a high damping fastener for urban rail transit rails.
Fig. 10 is a schematic structural view of an underfloor damping pad of a high damping fastener for an urban rail transit rail.
Fig. 11 is a schematic structural diagram of a pre-tightening bolt of a high-grade vibration damping fastener for urban rail transit rails.
Wherein: 1-rail lower pad, 2-upper iron base plate, 21-mounting hole, 22-mounting bolt, 23-bolt sleeve, 24-mounting pad, 25-spring washer, 3-middle damping pad, 31-preformed hole, 4-damping plate, 5-plate lower damping pad, 6-lower iron base plate, 61-mounting groove, 62-mounting column, 63-drain hole, 64-plate drain hole, 65-pad drain hole, 66-pad drain groove, 67-bolt drain groove, 68-mounting frame, 7-insulating coupling base plate, 8-fixing seat, 81-limiting groove, 82-buckling groove, 83-T bolt, 84-fixing nut, 85-fixing elastic strip, 86-rail gauge block, 9-pre-tightening bolt hole, 91-pre-tightening bolt, 91-tightening bolt sleeve, 9-pre-tightening bolt hole, 92-pre-tightening nut, 93-pre-tightening bolt groove.
Detailed Description
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A high-grade vibration damping fastener for urban rail transit rails comprises a rail lower pad 1, an upper iron base plate 2, a middle vibration damping pad 3, a vibration isolation plate 4, a lower plate vibration damping pad 5, a lower iron base plate 6, an insulation coupling base plate 7 and a fixing device; the lower rail pad 1, the upper iron base plate 2, the middle vibration damping pad 3, the vibration isolation plate 4, the lower plate vibration damping pad 5, the lower iron base plate 6 and the insulating coupling base plate 7 are arranged layer by layer from top to bottom; the upper iron base plate 2, the vibration isolation plate 4, the lower iron base plate 6 and the insulating coupling base plate 7 are main supporting structures of the whole device, and the rail lower pad 1, the middle vibration damping pad 3 and the plate lower vibration damping pad 5 are installed in a matched mode to achieve the vibration damping function of the device; the lower rail pad 1 is directly contacted with the steel rail, and the fixing device arranged on the upper iron base plate 2 is used for fixing the steel rail; the damping effect of the device can be effectively increased through the combination of the middle damping pad 3, the vibration isolation plate 4 and the under-plate damping pad 5.
The rail lower pad 1 is a rectangular rubber pad, and the front end and the rear end of the rail lower pad are provided with downward bending structures, so that the rail lower pad 1 can be conveniently positioned and fixed;
the upper iron base plate 2 is a rectangular plate, mounting holes 21 with circular hollow structures are formed in the diagonal positions of the upper iron base plate, and the upper iron base plate is matched with a fixing device to fix the steel rail;
the middle damping pad is a rectangular plate with the same shape as the upper iron backing plate 2, and a reserved hole 31 with a circular hollow structure corresponding to the mounting hole 21 is arranged at the diagonal position;
the vibration isolation plate 4 is a plate corresponding to the shape of the mounting groove 61 on the lower iron base plate 6;
the lower plate vibration damping pad 5 is a rubber pad with the same shape as the vibration isolation plate 4, and the lower plate vibration damping pad 5 is arranged in the mounting groove 61;
the lower iron backing plate 6 is a plate with the same shape as the upper iron backing plate 2, mounting columns 62 are arranged at the diagonal positions of the lower iron backing plate 6 corresponding to the mounting holes 21, the mounting columns 62 are of a cylindrical structure penetrating through hollows in the middle, and mounting grooves 61 of an invagination structure are arranged on the lower iron backing plate 6;
the insulating coupling base plate 7 is in a structure corresponding to the shape of the lower iron base plate 6;
go up the diagonal position that mounting hole 21 set up on the iron tie plate 2 and set up fixing device, fixing device includes fixing base 8, spacing groove 81, buckle groove 82, T type bolt 83, fixation nut 84, fixed bullet strip 85, gauge block 86, the top outside of fixing base 8 sets up arc spacing groove 81, the inboard position of fixing base 8 sets up buckle groove 82, T type bolt 83 lower extreme is detained in buckle groove 82, fixed bullet strip 85 passes T type bolt 83 and fixed bullet strip 85 outside is fixed in spacing groove 81, inboard lower part contact gauge block 86, gauge block 86 is L shape structure for the cross-section, fixation nut 84 is fixed in T type bolt 83 top, compress tightly gauge block 86 through screwing fixation nut 84, fixing device's both sides gauge block 86 fixed rail.
The inside construction bolt 22 that sets up of erection column 62, construction bolt 22 runs through erection column 62, construction bolt 22 below sets up bolt sleeve 23, construction bolt 22 upper end is through setting up mounting pad 24 with last iron backing plate 2 intermediate position, bolt sleeve 23 sets up in insulating coupling backing plate 7 below, the screw thread setting that bolt sleeve 23 internal thread corresponds construction bolt 22, the inside diameter of running through that bolt sleeve 23 external diameter is greater than erection column 62, the below of insulating coupling backing plate 7 is hugged closely along the outer edge of bolt sleeve 23, realize fixing of integrated device through construction bolt 22 and the cooperation of bolt sleeve 23, with last iron backing plate 2, well damping pad 3, vibration isolator 4, damping pad 5 and lower iron backing plate 6 press from both sides tightly under the board.
A spring washer 25 is arranged between the top of the mounting bolt 22 and the mounting gasket 24, so that loosening of the mounting bolt 22 caused by gravity when a vehicle is pressed down cannot occur in the practical process of the device, and the use risk of the device is avoided.
The outer side of the bolt sleeve 23 is provided with mounting threads, so that the whole device can be fixed and mounted conveniently in the construction process.
The installation groove 61 is internally provided with a drain hole 63, the drain hole 63 penetrates through the lower iron backing plate 6, the vibration isolation plate 4 is provided with a plate drain hole 64 corresponding to the drain hole 63, and the lower vibration damping pad 5 is provided with a pad drain hole 65 corresponding to the drain hole 63 and used for draining residual water in the device, so that the use safety of the device is ensured, and the service life of the device can also be ensured.
The drainage port position of the lower part of the lower iron backing plate 6 is provided with a pad drainage groove 66 with an invagination structure, so that accumulated water in the device can be drained smoothly.
And a bolt drainage groove 67 of an invagination structure is arranged at the position of the mounting column 62 below the lower iron backing plate 6.
Go up indisputable backing plate 2, corresponding position on well damping pad 3 and the lower iron backing plate 6 sets up the pretension bolt hole 9 that runs through the structure, set up pretension bolt 91 in the pretension bolt hole 9, pretension nut 92 is fixed to pretension bolt 91 top, be used for going up indisputable backing plate 2, well damping pad 3, vibration isolating plate 4, damping pad 5 under the board, lower iron backing plate 6 pretension, damping pad 3 and damping pad 5 under the board have certain extrusion effect in can realizing like this, the effect of improvement device damping, long-term back of using simultaneously, when well damping pad 3 and damping pad 5 under the board appear the circumstances of elastic drop, damping pad 3 and damping pad 5 still have good damping effect under the board through screwing pretension bolt 91 can guarantee, reduce the device and use cost of overhaul, increase the reliability of the use of device.
The lower part of the lower iron base plate 6 is provided with a pre-tightening bolt groove 93 with an invagination structure, so that the lower end of the pre-tightening bolt 91 can be clamped in the pre-tightening bolt groove 93, and the tightness of the pre-tightening bolt 91 can be adjusted conveniently by a maintainer.
The installation frame 68 is arranged around the installation groove 61, so that the vibration isolation plate 4 and the under-plate vibration isolation pad 5 are conveniently positioned, the situation that the vibration isolation plate 4 and the under-plate vibration isolation pad 5 are displaced in the using process is avoided, and the use reliability of the device is ensured.
Principle of operation
When the device is assembled, the lower rail pad 1, the upper iron base plate 2, the middle vibration damping pad 3, the vibration isolation plate 4, the lower plate vibration damping pad 5 and the lower iron base plate 6 are installed layer by layer; then, inserting the pre-tightening bolt 91 into the pre-tightening bolt hole 9 from the lower part, fixing the pre-tightening bolt 91 in the pre-tightening bolt groove 93, and fixing through the pre-tightening nut 92; fixing the insulating coupling pad 7 below the lower iron pad 6, arranging the mounting pad 24, the spring washer 25 and the mounting bolt 22 in sequence, inserting the mounting bolt 22 into the mounting hole 21 in the mounting column 62 from above, and screwing and mounting from below the insulating coupling pad 7 through the bolt sleeve 23; and finally, combining and pre-assembling the T-shaped bolt 83, the fixing nut 84, the fixing elastic strip 85 and the gauge block 86 to finish the combined installation of the integral device.
Overhaul, when damping effect descends to appear in the well shock pad 3 of device and shock pad 5 under the board, operating personnel can press from both sides tightly last iron backing plate 2, well shock pad 3, vibration isolator 4, damping pad 5 under the board, iron backing plate 6 down through adjusting pretension nut 91 of screwing to shock pad 3 and the damping effect of shock pad 5 under the board in further increasing reach the effect that increases device damping effect.
This device major structure is by last indisputable backing plate, well damping pad, the board that shakes, damping pad under the board, iron backing plate down, the rail is filled up down, parts such as insulating coupling backing plate and pretensioning system constitute, when the fastener dispatches from the factory, upper and lower iron backing plate and intermediate rubber pad, vibration isolation board and board are filled up through pretensioning system pre-assembling as an organic wholely, adopt detachable auto-lock structure, all spare parts can be changed alone in the later stage operation process, the installation is simple, the damping effect is outstanding, and fastener self pretightning force scene can be adjusted fast.
In order to adapt to different types of steel rails and track structures, detailed technical indexes are shown in the following table 1:
TABLE 1 technical indexes of high-grade vibration-damping fastener
The materials and properties of the components of the device are as follows:
(1) rubber material
The middle damping pad, the rail lower pad and the plate lower damping pad are formed by vulcanizing natural rubber, and the material properties are shown in the following table 2:
TABLE 2 Performance chart of rubber pad material for high-grade vibration damping fastener
(2) Iron casting material
The material of the iron casting adopts QT450-10, and the material properties are shown in the following table 3:
TABLE 3 Performance chart of iron casting material for high-grade damping fastener
| Serial number | Item | Index | Test method | |
| 1 | Yield strength | ≧310MPa | GB/T 1348 | |
| 2 | Tensile strength | ≧450MPa | GB/T 1348 | |
| 3 | Elongation percentage | ≧10％ | GB/T 1348 | |
| 4 | Brinell hardness | (160-210)HBW | GB/T 231 | |
| 5 | Metallographic grade | ≤3 | GB/T 9441 |
(3) Polyethylene material
The insulating coupling base plate is made of polyethylene, and the material properties of the insulating coupling base plate are shown in the following table 4:
TABLE 4 high damping fastener coupling backing plate/heightening backing plate material performance table
| Serial number | Item | Unit of | Technical | Test method | |
| 1 | Hardness (Shore D) | Degree of rotation | 40～65 | GB/T 2411 | |
| 2 | Tensile strength | MPa | ≥8 | GB/T 1040 | |
| 3 | Elongation at break | ％ | ≥150 | GB/T 1040 | |
| 4 | Volume resistivity | Ω·cm | ≥108 | GB/T 1410 |
(4) Pretensioning system
The pretensioning system material properties are shown in table 5 below:
TABLE 5 Performance chart for pre-tightening system of high-grade vibration-damping fastener
| Name of item | Performance index/material | Standard of merit |
| Bolt | Stage 8.8 | GB/T 5782 |
| Nut | Stage 8.8 | GB/T 889.1 |
| Spring washer | 60Si2Mn | GB/T 7244 |
| Flat washer | Q235-A | GB/T 95 |
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a damping fastener such as urban rail transit track height which characterized in that: the device comprises a rail lower pad, an upper iron base plate, a middle damping pad, a vibration isolation plate, a plate lower damping pad, a lower iron base plate, an insulation coupling base plate and a fixing device; the lower rail pad, the upper iron base plate, the middle vibration damping pad, the vibration isolation plate, the lower plate vibration damping pad, the lower iron base plate and the insulating coupling base plate are arranged layer by layer from top to bottom;
the rail lower pad is a rectangular rubber pad, and the front end and the rear end of the rail lower pad are provided with downward bending structures;
the upper iron base plate is a rectangular plate, and mounting holes with circular hollow structures are formed in diagonal positions;
the middle vibration damping pad is a rectangular plate with the same shape as the upper iron base plate, and reserved holes of a circular hollow structure corresponding to the mounting holes are arranged at the diagonal positions;
the vibration isolation plate is a plate corresponding to the shape of the mounting groove on the lower iron base plate;
the lower plate vibration damping pad is a rubber pad with the same shape as the vibration isolation plate and is arranged in the mounting groove;
the lower iron base plate is a plate with the same shape as the upper iron base plate, mounting columns corresponding to the mounting holes are arranged at the diagonal positions of the lower iron base plate, and the middle of each mounting column is of a hollow-through cylindrical structure; the lower iron base plate is provided with an installation groove of an invagination structure;
the insulating coupling base plate is of a structure corresponding to the shape of the lower iron base plate;
the upper iron backing plate is characterized in that a fixing device is arranged at the diagonal position of the mounting hole, the fixing device comprises a fixing seat, a limiting groove, a buckling groove, a T-shaped bolt, a fixing nut, a fixed elastic strip and a gauge block, an arc-shaped limiting groove is formed in the outer side of the top of the fixing seat, the buckling groove is formed in the inner side of the fixing seat, the lower end of the T-shaped bolt is buckled in the buckling groove, the fixed elastic strip penetrates through the T-shaped bolt and the outer side of the fixed elastic strip to be fixed in the limiting groove, the inner lower portion of the fixed elastic strip is in contact with the gauge block, the gauge block is of an L-shaped structure, the fixing nut is fixed above the T-shaped bolt, the gauge block is tightly pressed through screwing the fixing nut, and the rail is fixed by the gauge blocks at two sides of the fixing device.
2. The urban rail transit rail high-grade damping fastener according to claim 1, characterized in that: the inside construction bolt that sets up of erection column, construction bolt run through the erection column, construction bolt below set up the bolt sleeve pipe, construction bolt upper end set up the mounting pad through with last iron backing plate intermediate position, the bolt sleeve pipe set up in insulating coupling backing plate below, the bolt sleeve pipe internal thread correspond the screw thread setting of construction bolt, the inside diameter of running through that the bolt sleeve external diameter is greater than the erection column, the bolt sheathed tube outer edge hug closely the below of insulating coupling backing plate.
3. The urban rail transit rail high-grade damping fastener according to claim 2, characterized in that: and a spring washer is arranged between the top of the mounting bolt and the mounting gasket.
4. The urban rail transit rail high-grade damping fastener according to claim 2, characterized in that: and the outer side of the bolt sleeve is provided with mounting threads.
5. The urban rail transit rail high-grade damping fastener according to claim 1, characterized in that: the vibration isolation plate is characterized in that a drain hole is formed in the mounting groove, the drain hole penetrates through the lower iron base plate, a plate drain hole is formed in the position, corresponding to the drain hole, of the vibration isolation plate, and a pad drain hole is formed in the position, corresponding to the drain hole, of the lower vibration isolation pad.
6. The urban rail transit rail high-grade damping fastener according to claim 5, characterized in that: and a pad drainage groove with an invagination structure is arranged at a drainage port below the lower iron base plate.
7. The urban rail transit rail high-grade damping fastener according to claim 1, characterized in that: and a bolt drainage groove with an invagination structure is arranged at the position of the mounting column below the lower iron base plate.
8. The urban rail transit rail high-grade damping fastener according to claim 1, characterized in that: the upper iron base plate, the middle vibration damping pad and the lower iron base plate are provided with pre-tightening bolt holes penetrating through the structure at corresponding positions, pre-tightening bolts are arranged in the pre-tightening bolt holes, and pre-tightening nuts are fixed above the pre-tightening bolts.
9. The urban rail transit rail high-grade damping fastener according to claim 8, characterized in that: and a pre-tightening bolt groove of an invagination structure is arranged below the lower iron base plate.
10. The urban rail transit rail high-grade damping fastener according to claim 1, characterized in that: and a mounting frame is arranged around the mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122357808.3U CN215947755U (en) | 2021-09-27 | 2021-09-27 | High-grade vibration reduction fastener for urban rail transit rails |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122357808.3U CN215947755U (en) | 2021-09-27 | 2021-09-27 | High-grade vibration reduction fastener for urban rail transit rails |
Publications (1)
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