CN220116928U - Variable rigidity fastener - Google Patents

Abstract

The utility model discloses a variable stiffness fastener which comprises a lower iron base plate, an upper iron base plate and an anchor bolt, wherein a buckling assembly for positioning and fixing steel rails is arranged on the upper iron base plate, an elastic base plate is arranged between the upper iron base plate and the lower iron base plate, a group of gaps are circumferentially arranged on the elastic base plate, steel springs are arranged at the positions of the gaps, the upper end face of each steel spring is lower than the upper surface of the elastic base plate, a group of blind holes for installing the steel springs are arranged on the lower iron base plate, and a group of convex rings for allowing the upper ends of the steel springs to penetrate into limiting steel springs are arranged on the upper iron base plate; the fastener adopting the structure has the advantages that the steel spring with higher rigidity is arranged between the upper iron base plate and the lower iron base plate, the front section provides better vibration reduction effect through the elastic base plate, and the rear section provides higher rigid support through the steel spring, so that the vibration reduction requirement is met, and meanwhile, the safety coefficient is higher.

Description

Variable rigidity fastener

Technical Field

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

Background

The fastener is used for installing and positioning the rail to the sleeper, has certain damping effect, and traditional two-layer iron backing plate fastener is provided with the elastic backing plate between last iron backing plate and lower iron backing plate, plays the damping effect through the compression deformation of elastic backing plate, and for having better damping effect, the elastic backing plate rigidity is less warp greatly, if the load is too big then excessively warp easily and lead to last iron backing plate and rail to float too big to cause the potential safety hazard.

Disclosure of Invention

In order to solve the problem that the rigidity of an elastic backing plate in the prior art is not changeable, the utility model provides a fastener which can not only meet the vibration reduction effect in a limited space, but also has higher safety coefficient, and the technical scheme adopted by the utility model is as follows:

the utility model provides a variable rigidity fastener, includes lower iron backing plate and last iron backing plate and anchor bolt, anchor bolt pass last iron backing plate and lower iron backing plate and sleeper connection last iron backing plate on be provided with the buckle assembly of fixed rail of location go up iron backing plate and rail between be provided with rail lower backing plate be provided with the board lower bolster between lower iron backing plate and the sleeper last iron backing plate and lower iron backing plate between be provided with the elastic shim plate circumference be provided with a set of breach the breach position be provided with the steel spring, the steel spring up end be less than the elastic shim plate upper surface be provided with a set of blind hole of installing the steel spring on the lower iron backing plate last iron backing plate be provided with a set of steel spring upper end and penetrate spacing steel spring's bulge loop anchor bolt on the cover be equipped with the pretension cover that passes last iron backing plate and elastic shim plate the lower terminal surface contact down iron backing plate the pretension cover upper end be provided with the steel spring upper end and be less than the elastic shim plate upper surface and the tight end of anchor bolt clearance is kept in the state under the tight backing plate upper end and the lower surface.

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 the track gauge block is tightly pressed at the bottom of a steel rail through the free end of the spring strip.

The fastener adopting the structure has the advantages that the steel spring with higher rigidity is arranged between the upper iron base plate and the lower iron base plate, the front section provides better vibration reduction effect through the elastic base plate, and the rear section provides higher rigid support through the steel spring, so that the vibration reduction requirement is met, and meanwhile, the safety coefficient is higher.

Drawings

FIG. 1 is a view of a fastener in use;

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

fig. 3 is an exploded view of the fastener.

Detailed Description

The technical scheme of the utility model is further described in detail below with reference to specific embodiments and attached drawings.

The fastener shown in fig. 1 to 3 comprises an upper iron pad 2, a lower iron pad 1 and an anchor bolt 3, through holes for the anchor bolt 3 to pass through are arranged on the upper iron pad 2 and the lower iron pad 1, and the anchor bolt 3 passes through the upper iron pad 2 and the lower iron pad 1 to be connected with a sleeper A so as to install the fastener on the sleeper.

The upper iron backing plate 2 is provided with a buckling assembly 4, the buckling assembly 4 comprises a spring strip seat 4-1, a spring strip 4-2 and a track gauge block 4-3, in the embodiment, the spring strip 4-2 is installed on the spring strip seat 4-1 by adopting an e-shaped spring strip, the track gauge block 4-3 is buckled at the bottom of a steel rail B, the free end of the spring strip 4-2 tightly presses the track gauge block 4-3 at the bottom of the steel rail, and the adjustment of the track gauge of the steel rail can be realized by changing the track gauge blocks 4-3 with different specifications.

In order to avoid rigid contact between the rail and the upper rail pad 2, a rail lower pad 5 is provided between the rail and the upper rail pad 2, and likewise in order to avoid rigid contact between the lower rail pad 1 and the sleeper, a plate lower pad 6 is provided between the lower rail pad 1 and the sleeper.

In order to achieve the vibration reduction effect, an elastic cushion 7 is arranged between the upper iron cushion 2 and the lower iron cushion 1, as the elastic cushion 7 mainly has the vibration reduction effect, the rigidity is small and easy to deform, but the excessive deformation can cause the excessive floating of the upper iron cushion 2 and the steel rail to generate potential safety hazards, so that the rigidity of the elastic cushion 7 needs to be increased within a certain deformation range to provide good support, a group of notches 7-1 are arranged in the circumferential direction of the elastic cushion 7, a group of steel springs 8 are arranged at the positions of the notches 7-1, and the steel springs 8 have high rigidity, can provide good support and can provide vibration reduction through compression deformation which is elastic and adaptive. The elastic backing plate 7 deforms within a certain range to play a good vibration reduction effect, the rigidity is changed through the steel spring 8 after a certain deformation amount is reached to provide a good support to avoid excessive deformation of the elastic backing plate 7, therefore, the upper end of the steel spring 8 is lower than the upper surface of the elastic backing plate 7, and the elastic backing plate 7 firstly deforms to reach a certain height and then provides a good support effect through the steel spring 8 to ensure a safety coefficient.

In order to position the steel spring 8 between the upper iron backing plate 2 and the lower iron backing plate 1, a blind hole 1-1 for installing the steel spring 8 is arranged on the lower iron backing plate 1, and a convex ring 2-1 for allowing the steel spring 8 to penetrate is arranged on the upper iron backing plate 2 to provide limit for the steel spring 8, so that the steel spring 8 cannot move when being compressed and deformed.

Because the elastic cushion 7 needs to be pre-compressed, the anchor bolt 3 is sleeved with the pre-tightening sleeve 9 penetrating through the upper iron cushion 2 and the elastic cushion 7, the lower end of the pre-tightening sleeve 9 can be in contact with the upper surface of the lower iron cushion 1, the upper end of the pre-tightening sleeve 9 is provided with the flange 9-1, the flange 9-1 is limited and blocked by the upper surface of the upper iron cushion 2, a certain gap is reserved between the lower end of the pre-tightening sleeve 9 and the upper surface of the lower iron cushion 1 before the anchor bolt 3 is screwed down, the gap is eliminated by screwing down the anchor bolt 3, the pre-compression of the elastic cushion 7 is realized, the lower surface of the upper iron cushion 2 is directly supported by the steel spring 8 when the pre-tightening gap is eliminated, the deformation of the lower rigidity of the elastic cushion 7 cannot be realized, and the vibration reduction effect cannot be realized, so that the height difference between the upper end of the steel spring 8 and the upper surface of the elastic cushion 7 is larger than the gap between the lower end of the pre-tightening sleeve 9 and the upper surface of the lower iron cushion 1 in an unpressurized state, and the upper surface of the upper iron cushion 8 is ensured to be kept a certain distance between the upper end of the steel cushion 8 and the upper surface of the upper iron cushion 2 after the pre-tightening of the elastic cushion 7 is not pre-tightened.

Claims (2)

1. The utility model provides a variable rigidity fastener, includes lower iron backing plate (1) and goes up iron backing plate (2) and anchor bolt (3), anchor bolt (3) pass and go up iron backing plate (2) and be connected with the sleeper go up iron backing plate (2) on be provided with the fixed rail of location and detain and press assembly (4) go up iron backing plate (2) and rail between be provided with rail lower bolster (5) be provided with board lower bolster (6) between lower iron backing plate (1) and the sleeper go up iron backing plate (2) and lower iron backing plate (1) between be provided with elastic backing plate (7), its characterized in that: the steel spring type steel anchor plate is characterized in that a group of notches (7-1) are circumferentially arranged on the elastic base plate (7), steel springs (8) are arranged at the positions of the notches (7-1), the upper end face of each steel spring (8) is lower than the upper surface of the corresponding elastic base plate (7), a group of blind holes (1-1) for installing the steel springs (8) are formed in the corresponding lower iron base plate (1), a group of convex rings (2-1) for allowing the upper ends of the steel springs (8) to penetrate into the limiting steel springs (8) are arranged on the corresponding upper iron base plate (2), a pre-tightening sleeve (9) penetrating through the corresponding upper iron base plate (2) and the corresponding elastic base plate (7) is sleeved on the corresponding anchor bolt (3), the lower end face of each pre-tightening sleeve (9) can be in contact with the upper surface of the corresponding lower iron base plate (1), a flange (9-1) blocked by the upper surface of the corresponding upper iron base plate (2) is arranged at the upper end of each pre-tightening sleeve (9), and the lower end of each pre-tightening sleeve (9) is in a non-tight state, and the height difference between the lower end of each pre-tightening sleeve (9) and the corresponding upper iron base plate (1) and the corresponding upper surface of the corresponding upper iron base plate (7) is smaller than the height difference between the upper end and the corresponding upper surface of the corresponding upper iron base plate (7.

2. A variable stiffness 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 the track gauge block (4-3) is tightly pressed at the bottom of a steel rail through the free end of the spring strip (4-2).