CN220013228U

CN220013228U - Rail fastener

Info

Publication number: CN220013228U
Application number: CN202321535836.2U
Authority: CN
Inventors: 陈刚; 张法明; 王红英; 刘娟娟; 杨铁梅; 张亚飞; 李强; 李玲
Original assignee: Shaanxi Changmei Science And Technology LLC
Current assignee: Shaanxi Changmei Science And Technology LLC
Priority date: 2023-06-15
Filing date: 2023-06-15
Publication date: 2023-11-14
Anticipated expiration: 2033-06-15

Abstract

The utility model relates to the field of rail transit, and particularly discloses a steel rail fastener which comprises an upper iron base plate, a lower iron base plate and an anchor bolt, wherein the upper iron base plate and the lower iron base plate are installed on a sleeper through the anchor bolt, a buckling assembly is arranged on the upper iron base plate and used for fixing a steel rail, a groove is arranged on the lower iron base plate, the upper iron base plate is embedded in the groove, an elastic base plate arranged between the upper iron base plate and the lower iron base plate is arranged in the groove, the upper iron base plate can be prevented from overturning through limiting of the inner wall of the groove, and meanwhile counter acting force of the fastener can be improved.

Description

Rail fastener

Technical Field

The utility model relates to the field of rail transit, in particular to a steel rail fastener.

Background

The rail fastener is used for positioning and fixing the rail and providing a certain vibration reduction effect, and the traditional rail fastener is provided with elastic backing plates below the rail and below the iron backing plates respectively to realize vibration reduction. Therefore, the prior fastener also has a fastener with two layers of iron base plates, and the elastic base plate is arranged between the two iron base plates to be used as a main vibration reduction component, so as to achieve better vibration reduction effect. The two layers of iron base plates enable the overall height of the fastener to be increased, the upper iron base plates are easy to turn over, and transverse force is basically transmitted to a track foundation by the anchor bolts, so that the bending moment action points of the anchor bolts are higher due to the increase of the heights of the fastener, the probability of fracture of the fastener is increased, and the safety performance of the fastener is reduced.

Disclosure of Invention

In order to solve the problems that a double-layer iron backing plate fastener in the prior art is easy to turn over and poor in transverse acting force resistance, the utility model adopts the following technical scheme:

the utility model provides a rail fastener, includes lower iron backing plate, last iron backing plate and anchor bolt, anchor bolt pass last iron backing plate and lower iron backing plate and be connected with the sleeper last iron backing plate on be provided with the buckle assembly of fixed rail last iron backing plate and rail between the rail bottom of rail be provided with the rail lower backing plate down between iron backing plate and the sleeper be provided with the board lower bolster down iron backing plate on be provided with the recess of last iron backing plate embedding go up iron backing plate and down iron backing plate between be provided with the elastic shim plate in the embedding recess anchor bolt on the cover be equipped with the pre-tightening cover that passes last iron backing plate and elastic shim plate, pre-tightening cover lower extreme and lower iron backing plate upper surface contact, pre-tightening cover upper end be provided with the bulge loop and buckle and last iron backing plate upper surface last iron backing plate between last iron backing plate circumference and the recess inner wall between be provided with the wear-resisting cover lower extreme be provided with the turn-ups that extend towards the inside iron backing plate, lower iron backing plate is provided with the breach that moves down in rail length direction and moves down.

Further, the buckling assembly comprises a spring strip seat, a spring strip and a track gauge block, wherein the spring strip is arranged on the spring strip seat and compresses the track gauge block on the bottom of the steel rail.

The fastener adopting the structure is characterized in that the upper iron base plate and the elastic base plate are embedded into the lower iron base plate, so that the upper iron base plate is restrained in the circumferential direction and is not easy to turn over, and meanwhile, the transverse acting force of the upper iron base plate directly acts on the inner wall of the groove and is limited by the lower iron base plate, so that the transverse acting force resisting effect is improved.

Drawings

FIG. 1 is a state diagram of a fastener;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is an exploded view of the fastener.

Detailed Description

The technical scheme is further described in detail below with reference to specific embodiments:

the fastener shown in fig. 1 to 3 comprises a lower iron backing plate 1, an upper iron backing plate 2 and an anchor bolt 3, wherein a buckling assembly 4 for positioning and fixing a steel rail A is arranged on the upper iron backing plate 2, the buckling assembly 4 comprises a spring strip seat 4-1, a spring strip 4-2 and a gauge block 4-3, the spring strip 4-2 is an e-shaped spring strip and is arranged in the spring strip seat 4-1, the gauge block 4-3 is buckled on the steel rail bottom, the free end of the spring strip 4-2 is used for pressing the gauge block 4-3 on the steel rail bottom so as to fix the steel rail, and meanwhile, the gauge of the steel rail can be adjusted by changing different gauge blocks, and besides the buckling assembly structure provided in the embodiment, the traditional buckling assembly of w-shaped spring strips can be adopted, and the specific structure of the buckling assembly is not repeated.

Through holes for the anchor bolts 3 to pass through are arranged on the upper iron base plate 2 and the lower iron base plate 1, and the anchor bolts 3 pass through the upper iron base plate 2 and the lower iron base plate 1 to be connected with the sleeper B so that the whole fastener is installed on the sleeper.

In order to avoid rigid contact between the steel rail and the upper iron pad 2, a rail lower pad 5 is arranged on the upper surface of the upper iron pad 2, in order to avoid rigid contact between the lower iron pad 1 and the sleeper, a plate lower pad 6 is arranged on the lower surface of the lower iron pad 1, the rail lower pad 5 and the plate lower pad 6 can avoid collision of rigid contact to reduce a part of vibration, and a certain friction force can be provided to enable the lower iron pad not to easily move.

In order to enable the fastener to have a good vibration reduction effect, an elastic cushion plate 7 is further arranged between the upper iron cushion plate 2 and the lower iron cushion plate 1, when a train passes through, the upper iron cushion plate 2 can generate vertical displacement, and the elastic cushion plate 7 is compressed to deform so as to achieve the vibration reduction effect.

And because the atress is unbalanced, can lead to the inside and outside deformation of elastic backing plate 7 inconsistent, and then can make upper iron backing plate 2 produce certain upset, this upset is allowed in controllable scope, if the upset is more severe and causes the incident easily, therefore upper iron backing plate 2 relatively perfect moving means is vertical movement, in order to play the direction constraint effect to upper iron backing plate 2, be provided with recess 1-1 on lower iron backing plate 1, elastic backing plate 7 and upper iron backing plate 2 are all embedded in recess 1-1, make upper iron backing plate 2 circumference receive the spacing of recess 1-1 inner wall, thereby can avoid upper iron backing plate 2's upset when upper iron backing plate 2 produces the float. And when the steel rail receives the transverse acting force, the transverse displacement of the upper iron backing plate 2 is limited by the inner wall of the groove 1-1 and is directly transmitted to the lower iron backing plate 1, so that the fastener has better transverse force resistance.

In order to enable the vertical moving resistance of the upper iron base plate 2 in the groove 1-1 to be small, larger friction between the circumferential direction of the upper iron base plate 2 and the inner wall of the groove 1-1 is avoided, a wear-resistant sleeve 9 is arranged on the circumferential direction of the upper iron base plate 2, the wear-resistant sleeve 9 is arranged between the circumferential direction of the upper iron base plate 2 and the inner wall of the groove 1-1, a flanging 9-1 is arranged at the bottom of the wear-resistant sleeve 9 in order to avoid the wear-resistant sleeve 9 from being separated in the vertical moving process of the upper iron base plate 2, the flanging 9-1 extends towards the inner side of the upper iron base plate 2, and when the wear-resistant sleeve 9 has a trend of separating from the upper iron base plate 2, the flanging 9-1 is blocked by the upper iron base plate 2, so that the wear-resistant sleeve is prevented from separating from the upper iron base plate 2.

Because the steel rail can also move in the vertical movement process of the upper iron backing plate 2, in order to avoid collision between the steel rail and the lower iron backing plate 1, a notch 1-2 is arranged on the lower iron backing plate 1, and the notch 1-2 can provide a abdication for the downward moving steel rail, so that the lower iron backing plate has enough movement space.

In order to provide a certain pretightening force for the elastic backing plate 7, a pretightening sleeve 8 is sleeved on the anchoring bolt 3, the pretightening sleeve 8 penetrates through the upper iron backing plate 2 and the elastic backing plate 7 to enable the lower end of the pretightening sleeve to be in contact with the upper surface of the lower iron backing plate 1, a convex ring 8-1 is further arranged at the upper end of the pretightening sleeve 8, the convex ring 8-1 is limited by the upper surface of the upper iron backing plate 2, a certain gap is reserved between the lower end of the pretightening sleeve 8 and the upper surface of the lower iron backing plate 1 under the condition that pretightening is not performed, the anchoring bolt 3 is tightened to eliminate the gap, meanwhile, the upper iron backing plate 2 is pressed against the elastic backing plate 7, the pretightening effect on the elastic backing plate 7 is achieved, but the pretightening effect is not excessively compressed, and the fastener is enabled to realize vibration reduction; at the same time, the anchor bolt 3 can also be firmly locked by the pre-tightening sleeve 8 to avoid loosening.

Claims

1. The utility model provides a rail fastener, includes lower iron backing plate (1), goes up iron backing plate (2) and anchor bolt (3), anchor bolt (3) pass iron backing plate (2) and lower iron backing plate (1) and be connected with the sleeper go up iron backing plate (2) on be provided with the withhold assembly (4) of fixed rail go up iron backing plate (2) and rail between be provided with rail lower bolster (5) lower iron backing plate (1) and sleeper between be provided with board lower bolster (6), its characterized in that: the steel rail fixing device is characterized in that a groove (1-1) for embedding an upper iron base plate (2) is formed in the lower iron base plate (1), an elastic base plate (7) embedded in the groove (1-1) is arranged between the upper iron base plate (2) and the lower iron base plate (1), a pre-tightening sleeve (8) penetrating through the upper iron base plate (2) and the elastic base plate (7) is sleeved on the anchor bolt (3), the lower end of the pre-tightening sleeve (8) is in contact with the upper surface of the lower iron base plate (1), a convex ring (8-1) is arranged at the upper end of the pre-tightening sleeve (8) and is buckled on the upper surface of the upper iron base plate (2), a wear-resistant sleeve (9) is arranged between the circumference of the upper iron base plate (2) and the inner wall of the groove (1-1), a flange (9-1) extending towards the inner side of the upper iron base plate (2) is arranged at the lower end of the wear-resistant sleeve (9), and a pair of notches (1-2) for allowing a steel rail to move downwards in the length direction are formed in the lower iron base plate (1).

2. A rail fastener according to claim 1, wherein: the buckling assembly (4) comprises a spring strip seat (4-1), a spring strip (4-2) and a track gauge block (4-3), wherein the spring strip (4-2) is arranged on the spring strip seat (4-1) and compresses the track gauge block (4-3) on the bottom of a steel rail.