CN215714295U - Multi-rigidity elastic backing plate - Google Patents

Abstract

The utility model discloses a multi-rigidity elastic cushion plate which comprises a base plate, wherein elastic bulges are distributed on the upper end surface and the lower end surface of the base plate in an array mode. The protrusions on the same plane include a first protrusion, a second protrusion, and a third protrusion having heights that decrease in sequence. The plurality of first bulges are arranged in an array, the plurality of second bulges are arranged in an array and are staggered with the first bulges in each row and each column, namely, the second bulges in each column are distributed between two columns of the first bulges, the second bulges in each row are distributed between two rows of the first bulges, and the third bulges are distributed between two adjacent first bulges and between two adjacent second bulges, so that different rigidity is provided, the elastic cushion plate is suitable for different track conditions, and the service life of the elastic cushion plate is prolonged.

Description

Multi-rigidity elastic backing plate

Technical Field

The utility model relates to the field of urban rail transit, in particular to a multi-rigidity elastic base plate.

Background

In recent years, urban rail transit systems such as domestic urban subways, light rails and trams are developed rapidly, and the tension situation of urban traffic is effectively relieved. In the urban rail construction, the track fastener system is indispensable, and the fastener is used for connecting rail and concrete sleeper or whole railway roadbed, buckles the mode realization of pressing the rail through the bullet strip and is connected with the rail, realizes being connected with the sleeper through the mode of anchor bolt fastening.

In order to reduce the track vibration and noise generated during the operation of a high-speed train and reduce the track rigidity, an iron base plate lower backing plate with certain static rigidity is adopted, which is considered as the simplest, most economical and practical effective method by the world, and the iron base plate lower backing plate is generally a rubber elastic backing plate and plays a role in providing elasticity in a fastener.

A large number of operations and tests show that the static rigidity of the rubber tie plate has great influence on the working states of locomotives, steel rails, concrete sleepers and track beds: when the rubber base plate with higher static rigidity is adopted, the vibration of the locomotive is aggravated, the diseases of the steel rail, such as saddle-shaped abrasion, wave-shaped abrasion and the like, are early, the sleeper is early damaged, the pulverization process of the track bed is accelerated, the static rigidity of the rubber base plate is reduced, the working state of the locomotive and the track can be improved, and the maintenance workload of the locomotive and the track is reduced; if the static rigidity is too small, the compression deformation of the elastic cushion plate is larger under a certain load condition, so that the stress state of the fastener is deteriorated, and the fastener with high static rigidity is easy to loosen; in a small-radius curve section, the smaller the static rigidity of the adopted rubber base plate is, the more serious the steel rail is tipped; if the static rigidity difference of the rubber base plate paved on the line is too large, the power imbalance of the track is caused, and the working state of the track is deteriorated.

The existing elastic base plates are only rigid, and the elasticity provided by the load when a train passes through is only elastic. The fastener can slowly lose efficacy after long-term use, and frequent change elastic backing plate causes the waste of manpower and materials, improves elastic backing plate's life and the performance of full play elastic backing plate are very necessary.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multi-rigidity elastic base plate which can provide different rigidities and is suitable for different track conditions.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

elastic backing plate of many rigidity, including the base plate, array cloth is elastic protruding on the upper and lower terminal surface of base plate, its characterized in that: the bulges positioned on the same surface comprise a first bulge, a second bulge and a third bulge, the heights of which are sequentially reduced; the first bulges are arranged in an array, the second bulges are arranged in an array and are staggered with the first bulges in each row and each column, the third bulges are arranged between two adjacent first bulges and between two adjacent second bulges, and after the third bulges are pressed and deformed by stress, the side surfaces of the first bulges can be contacted with the side surfaces of the third bulges.

The further technical scheme is as follows: the outermost protrusions on the substrate are first protrusions and third protrusions.

The further technical scheme is as follows: the protrusions are made of natural rubber with Shore D hardness of 50, and the substrate is made of natural rubber, synthetic rubber, thermoplastic polyurethane elastomer, rubber and plastic, casting polyurethane elastomer or high-pressure polyethylene with Shore D hardness of not less than 70.

The further technical scheme is as follows: the middle part of the substrate is provided with a reinforcing fiber layer.

The further technical scheme is as follows: the reinforced fiber layer is corrugated or wavy.

The further technical scheme is as follows: the upper end face and the lower end face of the substrate are symmetrically provided with bulges.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

in the normal working range of the train load, the low rigidity characteristic of the first bulge can be fully exerted, and at the moment, the elastic base plate is low in rigidity, good in elasticity and good in vibration isolation capacity; after the train load increases, the first protrusion, the rigidity that second protrusion and third protrusion are provided by the sequentially pressed elastic cushion plate can increase the safety during train running is higher, furthermore, after the third protrusion is pressed down to deform under stress, the side face of the first protrusion can be in contact with the side face of the third protrusion, the range of normal work is exceeded, through mutual extrusion of the third protrusion and the side face of the first protrusion, the rigidity curve of the rubber pad can be suddenly changed to increase, the rigidity sharply increased performance is favorable for safety protection, the resilience of mutual extrusion of the side faces of the protrusions can improve the quick recovery capacity of the protrusions after the train load decreases, and the fatigue life performance of the rubber pad can be improved.

In the structure, every four adjacent first bulges are arranged in a rectangular shape, one second bulge is arranged in the rectangular area, and four third bulges arranged in a diamond shape are arranged in the rectangular area, so that the stress distribution is uniform, and the service life performance of the rubber pad can be improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of the structure of the elastic backing plate;

fig. 2 is a front view structure schematic diagram of the elastic cushion plate.

Detailed Description

The technical solutions in the embodiments of the present invention are 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 some, not all, embodiments of the present invention. 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.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1 and 2, the multi-rigidity elastic cushion plate includes a substrate, wherein elastic protrusions are distributed on upper and lower end surfaces of the substrate in an array manner, and the upper end surface and the lower end surface of the substrate are symmetrically arranged. The protrusions are made of natural rubber with Shore D of 50, and the substrate is made of natural rubber, synthetic rubber, thermoplastic polyurethane elastomer, rubber and plastic, casting polyurethane elastomer or high-pressure polyethylene with Shore D of not less than 70. The geometrical structure of the protrusion can be in various shapes such as a cylinder, a stepped column in a convex shape, a frustum shape, an ellipse, a prism and the like.

The protrusions in the resilient pads of the present disclosure have two or more different heights, preferably three heights, to provide different stiffness. The protrusions on the same plane include a first protrusion, a second protrusion, and a third protrusion having heights that decrease in sequence. The first bulges are arranged in an array, the second bulges are arranged in an array and are staggered with the first bulges in each row and each column, namely, the second bulges in each column are distributed between two columns of the first bulges, the second bulges in each row are distributed between two rows of the first bulges, the third bulges are distributed between two adjacent first bulges and between two adjacent second bulges, and after the third bulges are pressed and deformed by stress, the side surfaces of the first bulges can be contacted with the side surfaces of the third bulges.

In the structure, every four adjacent first bulges are arranged in a rectangular shape, one second bulge is arranged in the rectangular area, and four third bulges arranged in a diamond shape are arranged in the rectangular area, so that the stress distribution is uniform, and the service life performance of the rubber pad can be improved. The outermost protrusions on the substrate are the first and third protrusions. The edge of the elastic base plate is supported by the first bulge, and the stress area supported by the first bulge is increased.

In the normal working range of the train load, the low rigidity characteristic of the first bulge can be fully exerted, and at the moment, the elastic base plate is low in rigidity, good in elasticity and good in vibration isolation capacity; after the train load increases, the first protrusion, the rigidity that second protrusion and third protrusion are provided by the sequentially pressed elastic cushion plate can increase the safety during train running is higher, furthermore, after the third protrusion is pressed down to deform under stress, the side face of the first protrusion can be in contact with the side face of the third protrusion, the range of normal work is exceeded, through mutual extrusion of the third protrusion and the side face of the first protrusion, the rigidity curve of the rubber pad can be suddenly changed to increase, the rigidity sharply increased performance is favorable for safety protection, the resilience of mutual extrusion of the side faces of the protrusions can improve the quick recovery capacity of the protrusions after the train load decreases, and the fatigue life performance of the rubber pad can be improved.

The middle part of the base plate is provided with a reinforced fiber layer which is corrugated or wavy, namely the base plate can be divided into three layers, namely an upper rubber layer and a lower rubber layer and the reinforced fiber layer in the middle part, so as to increase the performance of the base plate.

The above is only a preferred embodiment of the utility model, and any simple modifications, variations and equivalents of the utility model may be made by anyone in light of the above teachings and fall within the scope of the utility model.

Claims (6)

1. Elastic backing plate of many rigidity, including the base plate, array cloth is elastic protruding on the upper and lower terminal surface of base plate, its characterized in that: the bulges positioned on the same surface comprise a first bulge, a second bulge and a third bulge, the heights of which are sequentially reduced; the first bulges are arranged in an array, the second bulges are arranged in an array and are staggered with the first bulges in each row and each column, the third bulges are arranged between two adjacent first bulges and between two adjacent second bulges, and after the third bulges are pressed and deformed by stress, the side surfaces of the first bulges can be contacted with the side surfaces of the third bulges.

2. The resilient pad of claim 1, wherein: the outermost protrusions on the substrate are first protrusions and third protrusions.

3. The resilient pad of claim 1, wherein: the protrusions are made of natural rubber with Shore D hardness of 50, and the substrate is made of natural rubber, synthetic rubber, thermoplastic polyurethane elastomer, rubber and plastic, casting polyurethane elastomer or high-pressure polyethylene with Shore D hardness of not less than 70.

4. The resilient pad of claim 1, wherein: the middle part of the substrate is provided with a reinforcing fiber layer.

5. The resilient pad of claim 4, wherein: the reinforced fiber layer is corrugated or wavy.

6. The resilient pad of claim 1, wherein: the upper end face and the lower end face of the substrate are symmetrically provided with bulges.

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