CN219547451U - Floating type steel rail fastener - Google Patents

Abstract

The utility model discloses a floating rail fastener, which comprises a lower iron base plate fixed on a sleeper and an upper iron base plate provided with a buckling assembly for fixing a rail, wherein the upper iron base plate is provided with a rail lower base plate arranged at the bottom of the rail, the lower iron base plate is provided with a pair of retaining shoulders positioned at two sides of the upper iron base plate, a damping block which forms an oblique support for the upper iron base plate and enables the upper iron base plate to float on the lower iron base plate is arranged between the pair of retaining shoulders and the upper iron base plate, the lower iron base plate is provided with a limit bolt for limiting the floating height of the upper iron base plate, and the damping block is matched with the retaining shoulders and the upper iron base plate in a curved surface and is curved along the length direction of the rail; the floating vibration damping buckle adopting the modified scheme is compact in matching and capable of effectively preventing torsion due to the fact that the damping block is matched with the shoulder and the upper iron base plate through the curved surface, and the structure is simple and easy to install.

Description

Floating type steel 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 fixing the rail to the sleeper and providing a certain vibration reduction effect, wherein the floating rail vibration reduction fastener has a better vibration reduction effect, and as disclosed in patent 201721475112.8, a rail vibration reduction fastener with separately controlled transverse rigidity and vertical rigidity is provided, a lateral restraint body is arranged on a retaining shoulder of a base iron backing plate to form restraint support for the floating iron backing plate, in the scheme, the lateral restraint body is fixed on the retaining shoulder through pin installation, and the structure is inconvenient to install and hole system matching errors lead to the formation of torsion shake of the lateral restraint body.

Disclosure of Invention

In order to solve the problem that a damping block in a floating steel rail fastener is easy to shake and twist in the prior art, the utility model adopts the following technical scheme:

the utility model provides a floating rail fastener, includes the lower iron backing plate that is fixed in on the sleeper and is provided with the last iron backing plate that withholds the assembly and be used for fixed rail last iron backing plate on be equipped with the rail lower bolster of arranging the rail bottom in last iron backing plate on be provided with a pair of shelves shoulder that is located last iron backing plate both sides and all be provided with the damping piece that forms the inclined support to last iron backing plate and make last iron backing plate float on lower iron backing plate between this shelves shoulder and the last iron backing plate lower iron backing plate on be provided with spacing bolt of spacing last iron backing plate come-up height, damping piece and shelves shoulder and last iron backing plate be curved surface cooperation and curved along rail length direction.

Further, the curved surface is a cambered surface or a V-shaped surface.

Further, a baffle plate limited by an upper iron backing plate is arranged at the bottom of the damping block.

Further, the damping block is formed by alternately superposing a group of rubber pads and steel sheets.

Further, a guide column for installing a limit bolt and penetrating through the upper iron backing plate is arranged on the lower iron backing plate.

Further, a buffer cushion is arranged between the upper surface of the upper iron base plate and the limit bolt.

Further, a protective backing plate which is not contacted with the upper iron backing plate is arranged on the lower iron backing plate, and a plate lower backing plate is arranged between the lower iron backing plate and the sleeper.

Further, the buckling assembly comprises a spring strip, a pre-tightening bolt and a gauge block.

The floating vibration damping buckle adopting the modified scheme is compact in matching and capable of effectively preventing torsion due to the fact that the damping block is matched with the shoulder and the upper iron base plate through the curved surface, and the structure is simple and easy to install.

Drawings

FIG. 1 is a schematic view of a fastener structure;

FIG. 2, a is a top view of the fastener, and b is a stepped cross-sectional view in the direction A-A;

FIG. 3 is a schematic diagram of a damping block structure;

fig. 4, a is a schematic diagram of the structure of the upper iron pad, and b is a schematic diagram of the structure of the lower iron pad.

Detailed Description

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

The vibration damping fastener shown in fig. 1 and 2 comprises a lower iron backing plate 1, an upper iron backing plate 3, an anchor bolt 10, a buckling assembly 2, a damping block 5 and a limit bolt 6. The lower iron backing plate 1 is fixed to the sleeper through the anchor bolt 10, the buckling assembly 2 comprises a spring strip 2-1, a pre-tightening bolt 2-2 and a gauge block 2-3, a spring strip seat 3-1 is arranged on the upper iron backing plate 3 as shown in fig. 4a, the pre-tightening bolt 2-2 is connected with the spring strip seat 3-1 to fix the spring strip 2-1 to the spring strip seat 3-1, and the deformation end of the spring strip 2-1 compresses the gauge block 2-3 which is buckled on the rail bottom of the rail so as to fix the rail, and meanwhile, the gauge of the rail can be adjusted through the gauge blocks 2-3 with different specifications. In order to avoid rigid contact between the rail and the upper rail pad 3 and to improve vibration damping effect, a rail lower pad 4 arranged at the bottom of the rail is also arranged on the upper rail pad 3.

In order to float the upper iron pad 3 on the upper iron pad 3, a pair of shoulders 1-1 is arranged on the lower iron pad 1 as shown in fig. 4b, a damping block 5 is arranged between the upper iron pad 3 and the shoulders 1-1, the damping block 5 is matched with the contact part of the upper iron pad 3 through an inclined plane 5a to form an inclined support for the upper iron pad 3, the upper iron pad 3 is further in a floating state, and the damping block 5 can be obliquely arranged by itself or the damping block 5 is in a wedge shape to realize inclined support in a manner of inclined support.

In order to prevent the damping block 5 from twisting when the upper iron base plate 3 floats, the matching parts of the damping block 5 and the upper iron base plate 3 and the shoulder 1-1 are matched by adopting a curved surface, and the curved surface is bent along the length direction of the steel rail, such as adopting the cambered surface matching in the embodiment, or adopting the V-shaped surface matching, namely the upper iron base plate 3 is not influenced to float up and down, the twisting of the damping block 5 and the scraping along the length direction of the steel rail can be limited, and the damping block 5 is placed into the shoulder 1-1 along the curved surface during installation, so that the installation is more convenient and quick.

In order to make the damping block 5 elastic and have good rigidity, the damping block 5 is formed by alternately stacking a group of rubber pads 5-2 and steel plates as shown in fig. 3.

Because the damping block 5 can move along the floating direction in the floating process of the upper iron base plate 3, in order to avoid the separation of the damping block 5 from the upper iron base plate 3 and the retaining shoulder 1-1, the bottom of the damping block 5 is provided with a baffle plate 5-1 extending to the bottom of the upper iron base plate 3, so that the damping block 5 is limited and blocked from separating by the upper iron base plate 3 in the upward moving process.

In order to limit the rebound floating height of the upper iron base plate 3, the upper iron base plate 3 can play a pre-tightening role on the damping block 5, a limit bolt 6 is arranged on the lower iron base plate 1, the upper iron base plate 3 is limited in floating height through the limit bolt 6, and the upper iron base plate 3 can further form extrusion pre-tightening on the damping block 5 when the limit bolt 6 is fastened.

In order to prevent the limit bolt 6 from being damaged or loosened due to overlarge impact on the limit bolt 6 in the floating process of the upper iron base plate 3, a buffer cushion 7 is arranged between the limit bolt 6 and the top of the upper iron base plate 3. In order to better provide guidance for the upper iron pad plate 3 and firmly install the limit bolt 6, a guide column 1-2 for installing the limit bolt 6 is arranged on the lower iron pad plate 1, the guide column 1-2 can pass through a through hole 3-2 on the upper iron pad plate 3 for the limit bolt 6 to pass through, so that the upper iron pad plate 3 can float up and down along the guide column 1-2, and pre-tightening is realized on the damping block 5 by eliminating the distance between the top surface of the guide column 1-2 and the top surface of the upper iron pad plate 3 when the limit bolt 6 is fastened, and meanwhile, the limit bolt 6 and the guide column 1-2 form fastening fit to further prevent the loosening of the limit bolt 6 caused by the impact of the upper iron pad plate 3.

In order to avoid that the damping block 5 with overlarge rail impact load cannot form effective support, the lower iron base plate 1 is provided with a protective base plate 8 which is arranged below the upper iron base plate 3 but is not contacted with the upper iron base plate 3, and the upper iron base plate 3 can be prevented from impacting the lower iron base plate 1 under large load impact, so that the vibration reduction effect is improved. In order to facilitate the installation and fixation of the protective pad 8, the lower iron pad 1 is provided with an installation groove 1-3 for installing the protective pad 8 as shown in fig. 4 b.

Also, in order to further enhance the vibration damping effect, a plate lower shim plate 9 is provided to avoid rigid contact between the lower iron shim plate 1 and the sleeper.

Claims (8)

1. The utility model provides a floating rail fastener, includes lower iron backing plate (1) and be provided with and withhold iron backing plate (3) that assembly (2) are used for fixed rail on sleeper upper iron backing plate (3) on be equipped with rail lower bolster (4) of arranging the rail bottom in lower iron backing plate (1) on be provided with a pair of shelves shoulder (1-1) that are located upper iron backing plate (3) both sides and all be provided with between this pair of shelves shoulder (1-1) and upper iron backing plate (3) and form diagonal bracing to upper iron backing plate (3) and make upper iron backing plate (3) float damping piece (5) on lower iron backing plate (1) on be provided with spacing upper iron backing plate (3) and come up high spacing bolt (6), its characterized in that: the damping block (5) is matched with the retaining shoulder (1-1) and the upper iron base plate (3) in a curved surface, and the curved surface is bent along the length direction of the steel rail.

2. A floating rail fastener as claimed in claim 1 wherein: the curved surface is a cambered surface or a V-shaped surface.

3. A floating rail fastener as claimed in claim 1 wherein: a baffle plate (5-1) limited by the upper iron backing plate (3) is arranged at the bottom of the damping block (5).

4. A floating rail fastener according to claim 1 or 3, wherein: the damping block (5) is formed by alternately superposing a group of rubber pads (5-2) and steel sheets (5-3).

5. A floating rail fastener as claimed in claim 1 wherein: the lower iron backing plate (1) is provided with a guide column (1-2) which is used for installing a limit bolt (6) and can pass through the upper iron backing plate (3).

6. A floating rail fastener according to claim 1 or 5, wherein: a buffer cushion (7) is arranged between the upper surface of the upper iron base plate (3) and the limit bolt (6).

7. A floating rail fastener as claimed in claim 1 wherein: the lower iron backing plate (1) is provided with a protective backing plate (8) which is not contacted with the upper iron backing plate (3), and a plate lower backing plate (9) is arranged between the lower iron backing plate (1) and the sleeper.

8. A floating rail fastener as claimed in claim 1 wherein: the buckling assembly (2) comprises an elastic strip (2-1), a pre-tightening bolt (2-2) and a gauge block (2-3).