CN201288278Y - Elastic coupling e type spring fastener - Google Patents

Abstract

The utility model relates to an elastic connection e-shaped spring fastener. Subway ballastless track fastener technology development in China begins at 1960s, after research test and application for many years, fasteners of various models capable of satisfying various purpose are basically formed, at present, compatibility of elastic strip attaching force and elasticity performance improvement of spring are still improved. The utility model comprises an elastic strip, a anchoring bolt, a heavy type spring washer, a iron backing plate, an embedded positioning gusset plate and a large cushion under a plate, the embedded positioning gusset plate is arranged over the iron backing plate and is connected with the embedded positioning gusset plate through the anchoring bolt; a baffle seat and a gear-type positioning gusset plate square hole are arranged at opposite angles of the iron backing plate, the large cushion under a plate is arranged under the iron backing plate, and the front and back sides of the embedded positioning gusset plate are tooth-shaped matched with the gusset plate square hole arranged on the iron backing plate. The utility model has advantages of good strength and stability, excellent elasticity, less components, less maintenance, easy replacement of elastic element, economic cost, and advanced structure.

Description

A kind of elastic connection e-type spring fastener

technical field

The utility model belongs to the technical field of urban rail transit, in particular to an elastically connected e-shaped spring fastener.

Background technique

The development of my country's subway ballastless track fastener technology began in the 1960s. After years of research, testing and application, various types of fasteners that can meet various purposes have basically been formed. It is still being improved and perfected. From the order of development, it can be divided into the first three generations and the subsequent improved generation.

The representative first-generation fasteners are bolted elastic gusset fasteners, such as DTI fasteners, which were only used in the first phases of the Beijing Metro Phase I and Phase II projects. At present, the first generation of fasteners has been eliminated in the construction of new lines due to their high rigidity and backward connection methods.

The second generation is a bolt ω-shaped elastic fastener. For example, Shanghai Metro Line 1 adopts elastic split ω-shaped clip DTIII fasteners with shoulders, and DTIII2 fasteners without shoulders ω-shaped clips still used in Shanghai Metro. The fasteners are also of the type with bolts and no shoulders. The buckle force of the bolt ω-shaped elastic strip fastener can be adjusted by the bolt torque. For the viaduct, it is easier to realize the small resistance of the fastener, but this kind of fastener has many parts, and the amount of installation and maintenance is large. It is not uniform enough and cannot well adapt to the requirements and trends of high smoothness and low maintenance of subway tracks.

The third generation is the boltless e-shaped elastic fastener, and the representative form is the DTVI2 fastener. Boltless elastic strip fasteners are widely used for their characteristics of uniform fastening force, few parts, simple and reliable, and basically "zero" maintenance. Some countries clearly stipulate that maintenance-free bolt-free spring fasteners must be used in new subway lines.

The disadvantages of the above-mentioned domestic separate fasteners are that the fasteners are connected in a simple way and the fasteners have poor elasticity. The bolts are used to anchor the fasteners on the sleeper. Due to the large torque of the bolts (above 200N.m), a large pressure is formed on the elastic rubber pad under the iron backing plate, which causes a large loss of elasticity of the rubber pad. Therefore, the actual stiffness of the fasteners in train operation is relatively high, and the elastic performance is poor; the main reason why the design of fasteners in my country lags behind foreign fasteners is that the detached fasteners cannot achieve the designed low stiffness due to the simple connection of high-torque bolts.

The follow-up improvement is mainly on the basis of the third-generation fasteners, and the technical improvement is aimed at the compatibility of the elastic buckle pressure and improving its elastic performance, which is the ongoing work of relevant professional researchers. Undoubtedly, follow-up improvement is the direction of my country's subway development.

Utility model content

The purpose of the utility model is to provide an elastically connected e-shaped spring fastener, which solves the problems existing in the prior art.

The technical scheme adopted in the utility model is:

The utility model is special in that it includes spring strips, anchor bolts, heavy spring washers, iron backing plates, embedded positioning buckle plates, and large rubber pads under the board; an embedded positioning buckle plate is arranged above the iron backing plate, which passes through The anchor bolts are connected with the embedded positioning buckle plate; the iron backing plate is provided with a stopper and a square hole of the tooth-shaped positioning buckle plate, arranged in a diagonal form, and a large rubber pad under the plate is arranged below it; the embedded positioning The front and rear sides of the lower part of the gusset are geared to match the square holes of the gusset provided by the iron backing plate.

The above-mentioned iron backing plate is provided with a 1:40 rail bottom slope.

The above-mentioned embedded positioning gusset is cast with ductile iron QT450-10, and the surface is sprayed with asphalt antirust paint.

The above-mentioned iron backing plate is cast with ductile iron QT450-10, and the surface is sprayed with asphalt antirust paint.

The above clips use single toe clips, type III clips or DI clips.

The above-mentioned large rubber pad under the board is provided with grooves and square holes matching the iron backing board and the embedded positioning buckle, and adopts neoprene or EPDM vulcanized body.

The advantage of the utility model place is:

The utility model has good strength and stability, excellent elasticity, few parts, less maintenance, easy replacement of elastic parts, economical cost, advanced structure, can be laid and applied on urban subways and light rail ballastless tracks, and has broad application prospects.

Description of drawings

Fig. 1 is a fastener assembly drawing;

Figure 2 is a side view of the embedded positioning gusset;

Fig. 3 is a plan view of the embedded positioning gusset;

Fig. 4 is a side view of the iron backing plate;

Fig. 5 is an iron backing plate plan view;

Figure 6 is a side view of the large rubber pad under the board;

Figure 7 is a plan view of the large rubber pad under the board.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1, the utility model includes a spring bar 1, an anchor bolt 3, a heavy spring washer 4, an iron backing plate 6, an embedded positioning buckle 7, and a large rubber pad 8 under the plate; above the iron backing plate 6, an embedded Type positioning gusset 7, it is connected with embedded positioning gusset 7 by anchor bolt; Described embedded positioning gusset 7 is higher than iron backing plate 6 bottoms 9mm; Described iron backing plate 6 is provided with retaining seat, tooth type The square holes of the positioning pinch plate are arranged in a diagonal form, and a large rubber pad 8 under the plate is arranged below it;

Referring to Figures 2 and 3, the front and rear sides of the lower part of the embedded positioning gusset 7 are toothed to match the square hole of the gusset plate reserved for the iron backing plate 6. After assembly, protrude 9 mm from the bottom of the iron backing plate 6 and insert it into the rubber backing plate 8. It has the functions of adjusting the gauge and resisting the tightening force of the anchor bolt 3. When the train passed, the wheel load pressure made the iron backing plate 6 move up and down along the embedded positioning buckle plate 7 . The embedded positioning gusset 7 is cast with ductile iron QT450-10, and the surface is sprayed with asphalt antirust paint. When assembling with the iron backing plate 6, the tooth surface is coated with an appropriate amount of grease.

Referring to Figures 4 and 5, the iron backing plate 6 directly bears the pressure of the rail and the lateral force of the wheel and rail, the pressure of the rail passes through the iron backing plate to the lower rubber backing plate 8 and the sleeper, and the lateral force of the wheel and rail passes through the iron backing plate 6, embedded The friction force generated by the positioning buckle plate 7, the anchor bolt 3 and the normal pressure of the fastener acts on the sleeper together. Because there is softer rubber pad 8 under the iron backing plate 6, in order to prevent it from being damaged by bending, the thickness is taken as 18mm. On the iron backing plate 6, the square holes for installing the elastic bar retaining seat and the tooth-shaped positioning buckle plate are reserved, and are arranged in a diagonal form. The 6 rail bearing grooves of the iron backing plate are provided with a 1:40 rail bottom slope. The iron backing plate 6 is cast with nodular cast iron QT450-10, and the surface is sprayed with asphalt antirust paint.

Referring to Figures 6 and 7, the shape of the rubber backing plate 8 is closely matched with the iron backing plate 6 and the embedded positioning gusset 7. The thickness of the rubber pad is 12mm, the upper and lower sides are grooved, and the design static stiffness is about 30-50kN/mm. A 9mm deep groove is reserved at the bottom of the assembly position of the embedded positioning gusset 7 to cooperate with it, and the thickness of the colloid at the bottom of the groove is 3mm, so that the embedded positioning gusset 7 is in elastic contact with the top surface of the concrete sleeper. The rubber backing plate 8 adopts neoprene or EPDM vulcanized body.

Claims (6)

1. An elastically connected e-type spring fastener, characterized in that: the elastically connected e-type spring fastener includes elastic bars (1), anchor bolts (3), heavy spring washers (4), iron backing plates ( 6), the embedded positioning gusset (7), the large rubber pad (8) under the plate; the embedded positioning gusset (7) is arranged above the iron backing plate (6), and it is connected with the embedded positioning buckle by the anchor bolt The plates (7) are connected; the iron backing plate (6) is provided with a retaining seat and a tooth-shaped positioning buckle plate square hole, arranged in a diagonal form, and a large rubber pad (8) under the plate is arranged below it; the embedded The front and rear sides of the formula positioning gusset (7) bottom cooperate with the square hole of the gusset that the tooth profile and iron backing plate (6) are provided with. 2. An elastic coupling e-shaped spring fastener according to claim 1, characterized in that: said iron backing plate (6) is provided with a 1:40 rail bottom slope. 3. An elastically connected e-type spring fastener according to claim 1 or 2, characterized in that: the embedded positioning buckle (7) is cast with ductile iron QT450-10, and the surface is sprayed with asphalt antirust paint . 4. An elastically connected e-shaped spring fastener according to claim 3, characterized in that: the iron backing plate (6) is cast with ductile iron QT450-10, and the surface is sprayed with asphalt antirust paint. 5. An elastic coupling e-shaped spring fastener according to claim 3, characterized in that: the elastic strip (1) is a single-toed elastic strip, a type III elastic strip or a DI elastic strip. 6. An elastically connected e-shaped spring fastener according to claim 3, characterized in that: the large rubber pad (8) under the board is provided with an iron backing plate (6), an embedded positioning buckle ( 7) For matching grooves and square holes, neoprene or EPDM vulcanized body is used.

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