CN214656035U

CN214656035U - Double-layer nonlinear vibration attenuation fastener system

Info

Publication number: CN214656035U
Application number: CN202120220571.1U
Authority: CN
Inventors: 马红超; 曹钢
Original assignee: Wuhan Kunneng Track System Technology Co ltd
Current assignee: Wuhan Kunneng Track System Technology Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-11-09
Anticipated expiration: 2031-01-27

Abstract

The utility model provides a double-layer nonlinear vibration damping fastener system, which is arranged between a steel rail and a sleeper and is buckled and pressed on the steel rail through an elastic strip and an insulating gauge block, the vibration damping fastener system is sequentially provided with a rail lower elastic backing plate, an upper base plate, a middle layer elastic backing plate, a lower base plate and a buffer backing plate from top to bottom, the upper base plate is connected and provided with a screw rod, the screw rod is matched and provided with a limit sleeve, a heavy spring washer and a nut and is combined with matched parts to stably connect the upper base plate, the middle layer elastic backing plate and the lower base plate; the lower bottom plate is also provided with two long round holes, the long round holes are provided with spiral spikes, the spiral spikes are provided with heavy spring washers, flat washers and adjusting flat cushion blocks in a matching way, and the lower bottom plate, the heightening cushion plate and the buffering cushion plate are connected and fixed on the sleeper through matching parts. The system has good vibration reduction effect, reliable and stable connection and convenient assembly and disassembly.

Description

Double-layer nonlinear vibration attenuation fastener system

Technical Field

The patent of the utility model relates to an urban rail transit technical field, concretely relates to double-deck nonlinear damping fastener system.

Background

In urban rail transit, single-layer fasteners and double-layer fasteners are the most commonly used rail vibration reduction products, and the single-layer fasteners comprise two layers of elastic units such as rail cushions and slab cushions and a layer of bottom plate, and have the advantages of light weight, low cost and the like. However, single layer fasteners suffer from two problems: firstly, the anchor bolt of the single-layer fastener compresses the under-plate pad through the bottom plate and fixes the whole fastener system, so that the elasticity of the under-plate pad cannot be fully exerted, and the installation torque of the anchor bolt is usually larger, so that the elastic loss of the backing plate is easily caused, and the vibration damping performance is poorer; secondly, the single-layer fastener can not be preassembled, all parts are scattered parts, when in site construction, all parts need to be put in place in sequence, and then installation and construction can be carried out, so that the problems that the number of construction site procedures is large, the construction speed is low, and the parts are scattered and lost easily are caused.

The double-layer fastener comprises two layers of elastic units such as a rail lower pad, a plate lower pad and the like, and an upper layer bottom plate and a lower layer bottom plate, and in addition, the double-layer fastener is assembled into an integrated structure by the upper bottom plate, the lower bottom plate and the plate lower pad through a self-locking structure, so that the placing process of parts can be reduced and the construction speed can be increased during site construction. There are reports related to double-layer fasteners in the art, for example, chinese patent CN201821560242 discloses a double-layer vibration-damping fastener, which is fastened on a sleeper by an anchor bolt and locks and connects an upper pad plate, a middle rubber pad and a lower pad plate together by matching a slope structure at the upper part of a raised upright column on the lower pad plate with a slope structure of a third through hole on a connecting sleeve. This double-deck damping fastener, greatly reduced self-locking structure's occupation space, and improved the stability of system, the structure is compacter, cost reduction. In addition, chinese patent CN201210533622 discloses an easily detachable and separable double-layer vibration-damping fastener system, which combines an upper base plate, a base plate elastic insulating pad and a lower base plate into an integrated structure through a base plate connecting sleeve, so as to realize the pre-assembly of products, and then fastens the base plate connecting sleeve, the upper base plate and the lower base plate on a road bed through anchor bolts.

However, the above prior art still has the following disadvantages: (1) the anchor bolts fasten the middle rubber pad/the bottom plate elastic insulating pad on the sleeper through the upper backing plate/the upper bottom plate, and although the compression force generated on the middle rubber pad/the bottom plate elastic insulating pad is small, the elasticity of the backing plate is still lost, so that the vibration reduction performance of the tie plate is influenced. (2) The upper padding plate, the middle rubber pad and the lower padding plate are connected into an integral structure through the self-locking structure, the connection mode is not high in reliability, and after long-time vibration, the problem of easy looseness exists, and potential safety hazards are easily caused. (3) The double-layer fastener is heavy in weight, inconvenient to carry, inconvenient to install and maintain on site and high in material cost.

Disclosure of Invention

The utility model discloses it is not enough to the above-mentioned among the prior art, provide a double-deck nonlinear damping fastener system, this system damping is effectual, connect reliable firm, the loading and unloading of being convenient for.

Realize the utility model discloses the technical scheme that above-mentioned purpose adopted does:

a double-layer nonlinear vibration attenuation fastener system is installed between a steel rail and a pre-buried sleeve of a sleeper and is buckled and pressed on the steel rail through an elastic strip and an insulating gauge block, the vibration attenuation fastener system is sequentially provided with a rail lower elastic base plate, an upper base plate, a middle layer elastic base plate, a lower base plate and a buffer base plate from top to bottom, wherein the top surface of the upper base plate is provided with a rail bearing part and an elastic strip installation part, the bottom surface of the upper base plate faces downwards and is provided with a screw rod, the middle layer elastic base plate is provided with a through hole at a position corresponding to the screw rod, the top surface of the lower base plate is provided with a boss at a position corresponding to the screw rod, the boss is positioned inside the through hole, the height of the boss is smaller than the thickness of the through hole, the middle of the boss is provided with a through hole screw rod connection hole, and the screw rod passes through the through hole and the screw rod connection hole to fixedly connect the upper base plate, the middle layer elastic base plate and the lower base plate;

the lower base plate is further provided with two long round holes, the cushion pad plate is correspondingly and equally provided with the long round holes, the upper base plate and the middle-layer elastic cushion plate are provided with notches in the corresponding area above the long round holes, the long round holes are provided with spiral spikes, the spiral spikes are provided with heavy spring washers and flat washers in a matched mode, the spiral spikes penetrate through the heavy spring washers, the flat washers and the long round holes to be connected and fixed on the embedded sleeve of the sleeper, and therefore the lower base plate and the cushion pad plate are connected and fixed on the sleeper.

The lower plate corresponds in boss department and is provided with spacing hole, and the supporting stop collar, heavy spring washer and the nut that is provided with of screw rod, wherein is provided with the dismantlement hole on the stop collar, is used for holding heavy spring washer's bullet pad mounting groove and is used for the fixed spacing nut mounting groove of nut, and bullet pad mounting groove and nut mounting groove intercommunication lower surface on the stop collar, the stop collar with spacing hole phase-match and with spacing hole interference fit installation, the screw rod passes heavy spring washer on the stop collar and fastens it through the nut.

And controlling the distance from the screwed nut to the bottom surface of the lower bottom plate to be 3.5-4.5 mm by adjusting the depth of the limiting hole.

The height of the boss is 2.8 mm-3.2 mm smaller than the thickness of the through hole.

The shape of the boss is circular, and the shape of the through hole is matched with that of the boss.

The upper surface of the long round hole is provided with a gauge adjusting tooth part, the spiral spike is further provided with an adjusting flat cushion block in a matched mode, the adjusting flat cushion block is located between the flat washer and the long round hole, the lower surface of the adjusting flat cushion block is provided with a tooth-shaped matching part, the tooth-shaped matching part is meshed with the gauge adjusting tooth part, and the gauge adjusting function is achieved by adjusting different meshing positions.

A heightening base plate is further arranged between the lower base plate and the buffering base plate, the heightening base plate is correspondingly provided with a long round hole, and the heightening base plate, the lower base plate and the buffering base plate are fixed on a sleeper through a screw spike.

Compared with the prior art, the utility model provides a double-deck nonlinear damping fastener system has following advantage: 1. the utility model discloses in through setting up under the rail two-layer elastic backing plate of elastic backing plate, middle level elastic backing plate and upper and lower two-layer rigid backing plate of bottom plate to still set up heightening backing plate and buffering backing plate, realized good shock attenuation performance. 2. The utility model discloses an optimize upper and lower plate structure, the upper plate and the middle level elastic backing plate that have got rid of spiral spike top correspond the structure, have reduced the weight of damping system, have reduced material cost, have reduced the installation and have maintained work load. 3. The utility model discloses a prefabricated, the mode of installing in advance in a plurality of spare parts factories such as upper and lower bottom plate, middle level elastic backing plate, the on-the-spot installation time that has significantly reduced has simplified the on-the-spot maintenance degree of difficulty, has improved the operating efficiency. 4. The utility model discloses wrap up in the stop collar with heavy load spring washer and nut, avoid not hard up through long-time vibration back screw rod for upper and lower bottom plate locking performance is good, and the reliability is high. 5. The utility model discloses a rationally set up the height of boss in the lower plate, can fully guarantee the elasticity effect of middle level elastic backing plate, can provide supplementary rigidity again under the special overload condition of train, prevent that the train amplitude is too big and produce the risk of toppling, improved the driving safety nature of train.

Drawings

Fig. 1 is an exploded view of a double-layered nonlinear vibration damping fastener provided by the present invention;

fig. 2 is a front view of the double-layered nonlinear vibration damping fastener provided by the present invention;

fig. 3 is a top view of the double-layered nonlinear vibration damping fastener provided by the present invention;

fig. 4 is a structural diagram of an upper base plate provided by the present invention;

in the figure: (a) the structure chart of the front side of the upper base plate, (b) the structure chart of the back side of the upper base plate;

fig. 5 is a structural diagram of the stop collar provided by the present invention;

in the figure: (a) the structure diagram of the front side of the limiting sleeve, (b) the top view of the back side of the limiting sleeve;

fig. 6 is a structural diagram of the middle elastic cushion plate provided by the present invention;

FIG. 7 is a structural diagram of a lower base plate according to the present invention;

in the figure: (a) the structure diagram of the front surface of the lower base plate, (b) the structure diagram of the back surface of the lower base plate;

FIG. 8 is a view showing the structure of the fixed connection of the upper bottom plate, the middle elastic cushion plate and the lower bottom plate;

in the figure: (a) the upper base plate, the middle layer elastic cushion plate and the lower base plate are fixedly connected in a structural drawing, and the upper base plate, the middle layer elastic cushion plate and the lower base plate are fixedly connected in a front view;

FIG. 9 is a block diagram of the adjustable flat cushion provided by the present invention;

in the figure: 1-steel rail, 2-sleeper, 201-embedded sleeve, 3-insulating track gauge block, 4-elastic strip, 5-rail lower elastic cushion plate, 6-upper bottom plate, 601-rail bearing part, 602-elastic strip mounting part, 603-screw rod, 604-limiting sleeve, 6041-disassembly hole, 6042-elastic cushion mounting groove, 6043-nut mounting groove, 605-heavy spring washer A, 606-nut, 7-middle elastic cushion plate, 701-through hole, 8-lower bottom plate, 801-limiting hole, 802-boss, 803-screw rod connecting hole, 804-long round hole, 805-track gauge adjusting tooth part, 9-heightening cushion plate, 10-buffer cushion plate, 11-screw rail nail, 1101-heavy spring washer B, 1102-flat washer and 1103-adjusting flat cushion block.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The structure diagram of the double-layer nonlinear vibration damping fastener system provided by the utility model is shown in fig. 1-3, and is installed between the pre-embedded sleeve 201 of the rail 1 and the sleeper 2, and is buckled and pressed on the rail through the elastic strip 4 and the insulating gauge block 3, the vibration damping fastener system is sequentially provided with a rail lower elastic backing plate 5, an upper base plate 6, a middle elastic backing plate 7, a lower base plate 8, a heightening backing plate 9 and a buffer backing plate 10 from top to bottom, the whole height adjustment of the vibration damping fastener system is realized by replacing heightening backing plates with different specifications, the heightening backing plate can not be arranged under the standard state, wherein the structure of the upper base plate is shown in fig. 4, the top surface of the upper base plate is provided with a rail bearing part 601 for installing the rail lower elastic backing plate and an elastic strip installing part 602 for fixing the elastic strip, the elastic strip installing part is provided with two opposite angles along the upper base plate, the bottom surface of the upper base plate is provided with a screw 603 downwards, in this embodiment, the screw is provided with a limit sleeve 604, a heavy-duty spring washer a605 and a nut 606 in a matching manner, wherein the limit sleeve is provided with a dismounting hole 6041, a spring washer mounting groove 6042 for accommodating the heavy-duty spring washer and a nut mounting groove 6043 for fixing and limiting the nut, the structure of the limit sleeve is as shown in fig. 5, the spring washer mounting groove and the nut mounting groove are communicated with the upper surface and the lower surface of the limit sleeve to achieve the purpose of preventing the nut from loosening, in this embodiment, a hexagonal limit sleeve is used for explanation, but the limit sleeve is not limited to a hexagon in actual use, and can be a polygonal limit sleeve such as a quadrangle, a pentagon, an octagon and the like; middle level elastic backing plate corresponds the position at the screw rod and is provided with through-hole 701, and the structure of middle level elastic backing plate is as shown in FIG. 6, the structure of lower plate is as shown in FIG. 7, the top surface of lower plate corresponds the position at the screw rod and is provided with boss 802, the boss is located the inside of through-hole, and under general condition, the normal within range vibration of train will lead to middle level elastic backing plate 2mm ~ 3mm deflection, and when the train transships the vibration, the elastic backing plate deflection surpassed 3mm, not only influenced the comfort level of taking of train, and the driving safety of train also has the risk. In the embodiment, the height of the boss is 2.8-3.2 mm smaller than the thickness of the through hole, when the train vibrates in an overload mode, the boss is in direct contact with the upper base plate after the middle-layer elastic cushion plate exceeds the compression limit, supplementary rigidity under special conditions is provided, and the overturning risk caused by overlarge train amplitude is prevented; in the embodiment, the boss is circular, the shape of the through hole is matched with that of the boss, a through hole screw rod connecting hole 803 is arranged in the middle of the boss, a limiting hole 801 is correspondingly arranged at the boss of the lower base plate, the limiting sleeve is matched with the limiting hole and is installed in interference fit with the limiting hole, the screw rod penetrates through the through hole, the screw rod connecting hole, the limiting sleeve and the heavy spring washer and connects the upper base plate, the middle layer elastic cushion plate and the lower base plate through nuts, and the fixed connection diagram is shown in fig. 8; by adjusting the depth of the limiting hole, the distance between the screwed nut and the bottom surface of the lower bottom plate is controlled to be 3.5-4.5 mm, and even if other anti-loosening measures are invalid, the nut is limited in the limiting hole, so that the upper bottom plate and the lower bottom plate cannot be completely loosened and separated.

The lower bottom plate is also provided with two long round holes 804, the height-adjusting cushion plate and the buffer cushion plate are correspondingly provided with the long round holes, and the upper bottom plate and the middle-layer elastic cushion plate are provided with notches in corresponding areas above the long round holes, so that the weight of the upper bottom plate and the middle-layer elastic cushion plate is reduced, the material cost is reduced, and the installation and maintenance workload is reduced; the spiral spike 11 is installed on the oblong hole, the heavy spring washer B1101 and the flat washer 1102 are arranged on the spiral spike in a matched mode, the spiral spike penetrates through the heavy spring washer, the flat washer and the oblong hole to be connected and fixed on the embedded sleeve of the sleeper, and therefore the lower bottom plate, the height-adjusting base plate and the buffering base plate are connected and fixed on the sleeper.

The upper surface of the long round hole is provided with a gauge adjusting tooth part 805, the spiral spike is further provided with an adjusting flat cushion block 1103 in a matched mode, the structure of the spiral spike is as shown in fig. 9, the adjusting flat cushion block is located between the flat washer and the long round hole, the lower surface of the adjusting flat cushion block is provided with a tooth-shaped matching part, the tooth-shaped matching part is meshed with the gauge adjusting tooth part, and the gauge adjusting function is achieved by adjusting different meshing positions.

In the embodiment, the upper bottom plate, the lower bottom plate and the middle layer elastic cushion plate are connected into a whole through the screw rod arranged on the upper bottom plate and the heavy spring washer, the nut and the limiting sleeve matched with the screw rod, and the lower bottom plate, the height-adjusting cushion plate and the buffering cushion plate are connected into the pre-embedded sleeve pre-buried in the sleeper through the screw spike, the heavy spring washer, the flat washer and the adjusting flat cushion block matched with the screw rod. The elastic backing plate under the rail is arranged above the upper base plate and below the steel rail, and the elastic strip is connected and fixed on the upper base plate and buckled and pressed on the steel rail through the insulating gauge block, so that the upper base plate is fixedly connected with the steel rail. So far, the steel rail is safely and reliably fixed on the concrete sleeper through the vibration damping fastener system, and the better vibration damping performance of the vibration damping fastener system is realized through two layers of elastic vibration damping layers.

The integral gauge adjustment of the fastener system is +/-16 mm, and the gauge adjustment of the unilateral steel rail is +/-8 mm. The single-side +/-3 mm gauge adjustment amount can be realized by replacing the insulating gauge blocks of different types, and the +/-5 mm gauge adjustment amount can be realized by combining the lower bottom plate with the adjusting flat gasket. In addition, the height adjusting base plate with different specifications can be replaced to realize that the overall height adjusting quantity of the fastener system is 0-20 mm.

Claims

1. The utility model provides a double-deck nonlinear damping fastener system installs between the buried sleeve of rail and sleeper to withhold its characterized in that on the rail through bullet strip and insulating gauge block: the vibration-damping fastener system is sequentially provided with a rail-bound lower elastic backing plate, an upper base plate, a middle-layer elastic backing plate, a lower base plate and a buffer backing plate from top to bottom, wherein the top surface of the upper base plate is provided with a rail bearing part and an elastic strip mounting part, the bottom surface of the upper base plate is provided with a screw rod downwards, the middle-layer elastic backing plate is provided with a through hole at a position corresponding to the screw rod, the top surface of the lower base plate is provided with a boss at a position corresponding to the screw rod, the boss is positioned inside the through hole, the height of the boss is smaller than the thickness of the through hole, a through hole screw rod connecting hole is formed in the middle of the boss, and the screw rod penetrates through the through hole and the screw rod connecting hole to fixedly connect the upper base plate, the middle-layer elastic backing plate and the lower base plate;

2. The dual layer non-linear vibration damping fastener system according to claim 1 in which: the lower plate corresponds in boss department and is provided with spacing hole, and the supporting stop collar, heavy spring washer and the nut that is provided with of screw rod, wherein is provided with the dismantlement hole on the stop collar, is used for holding heavy spring washer's bullet pad mounting groove and is used for the fixed spacing nut mounting groove of nut, and bullet pad mounting groove and nut mounting groove intercommunication lower surface on the stop collar, the stop collar with spacing hole phase-match and with spacing hole interference fit installation, the screw rod passes heavy spring washer on the stop collar and fastens it through the nut.

3. The dual layer non-linear vibration damping fastener system according to claim 2 in which: and controlling the distance from the screwed nut to the bottom surface of the lower bottom plate to be 3.5-4.5 mm by adjusting the depth of the limiting hole.

4. The dual layer non-linear vibration damping fastener system according to claim 1 in which: the height of the boss is 2.8 mm-3.2 mm smaller than the thickness of the through hole.

5. The dual layer non-linear vibration damping fastener system according to claim 1 in which: the shape of the boss is circular, and the shape of the through hole is matched with that of the boss.

6. The dual layer non-linear vibration damping fastener system according to claim 1 in which: the upper surface of the long round hole is provided with a gauge adjusting tooth part, the spiral spike is further provided with an adjusting flat cushion block in a matched mode, the adjusting flat cushion block is located between the flat washer and the long round hole, the lower surface of the adjusting flat cushion block is provided with a tooth-shaped matching part, the tooth-shaped matching part is meshed with the gauge adjusting tooth part, and the gauge adjusting function is achieved by adjusting different meshing positions.

7. The dual layer non-linear vibration damping fastener system according to claim 1 in which: a heightening base plate is further arranged between the lower base plate and the buffering base plate, the heightening base plate is correspondingly provided with a long round hole, and the heightening base plate, the lower base plate and the buffering base plate are fixed on a sleeper through a screw spike.