Insulating pressing block for a vibration-damping fastener

Abstract

The utility model discloses an insulating buckling block for damping fastener relates to rail transit technical field, including buckling block body, the buckling flange for buckling upper iron fender plate is provided with in buckling block body top one side, buckling block body lower side is provided with the clamping boss of close cooperation with the long hole of lower iron fender plate, the distance adjusting tooth that buckling block body upper side is provided with with distance adjusting cover board cooperation adjustment fastener overall position, the bolt mounting hole is passed through and is set up in the middle part of buckling block body, and this buckling block can realize electrical isolation with insulating material, can guarantee the strength of insulating buckling block through changing structure, and insulating buckling block and lower iron fender plate close cooperation will distance adjusting cover board and lower iron fender plate separate, play insulating protection function.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, specifically to an insulating clamping block for vibration damping fasteners. Background Technology

[0002] The track fastening system is a core component of railway track structures, playing a crucial role in fixing the position of rails, transmitting loads, adjusting track gauge, and providing elastic vibration damping. As the core load-bearing component of the fastening system, the performance of the fastening blocks directly affects the stability, safety, and operation and maintenance costs of the track structure.

[0003] Traditional clamping blocks are mostly made of metal materials such as cast iron and cast steel. Although they have the advantages of simple structure and low manufacturing cost, with the development of rail transit towards high speed, heavy load and electrification, the inherent defects of metal clamping blocks are becoming increasingly prominent. Specifically, they are as follows: (1) Lack of electrical insulation performance: The conductivity of metal materials means that the clamping block cannot block the current conduction between the rail and the sleeper, which can easily cause problems such as interference with track circuit signals and stray current corrosion. Especially in humid or polluted environments, the contact surface between metal parts may undergo electrochemical corrosion, which accelerates the aging of parts and threatens the safety of train operation. (1) Insufficient vibration reduction and noise reduction capabilities: Rigid metal materials cannot effectively absorb the vibration energy during train operation. The vibration waves are directly transmitted to the sleepers and track bed, which not only aggravates the fatigue damage of track components, but also generates high-decibel noise pollution, making it difficult to meet the stringent environmental protection requirements of urban rail transit; (2) Low functional integration: Traditional metal clamping blocks can only achieve a single clamping function and cannot work in conjunction with components such as the gauge adjustment cover to achieve dynamic gauge adjustment. In addition, they lack insulation protection design and require additional insulation pads or components, which leads to a complex system structure and low installation and maintenance efficiency.

[0004] To address the aforementioned issues, existing technologies have attempted to improve insulation performance by replacing metal clamping blocks with non-metallic materials. However, significant shortcomings remain: First, simply replacing materials cannot simultaneously guarantee both insulation and mechanical properties, easily leading to reduced clamping force or component breakage due to insufficient strength. Second, the structural design does not adequately consider the compatibility with the iron pad and adjustment cover, making the insulation interface susceptible to displacement due to vibration, potentially causing insulation failure. Third, the lack of coordinated design with track gauge adjustment functions hinders the integrated upgrade of the fastening system. Therefore, there is an urgent need to develop a new clamping block structure that, while ensuring high insulation and vibration resistance durability, can closely cooperate with other components of the fastening system to achieve multi-functional integration of electrical isolation, vibration reduction and noise reduction, and track gauge adjustment, thereby meeting the comprehensive requirements of modern rail transit for safety, environmental protection, and economy. Utility Model Content

[0005] The purpose of this utility model is to provide an insulating clamping block for vibration damping fasteners. This clamping block uses insulating material to achieve electrical isolation. By changing the structure, the strength of the insulating clamping block can be guaranteed. The insulating clamping block and the lower iron pad are closely fitted to separate the adjusting cover plate from the lower iron pad, thus playing an insulating and protective role.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an insulating clamping block for vibration damping fasteners, comprising a clamping block body, a clamping flange for clamping an upper iron pad is provided on one side of the top of the clamping block body, a clamping boss for tightly engaging with an elongated hole in the lower iron pad is provided on the lower side of the clamping block body, adjusting teeth for adjusting the overall position of the fastener are provided on the upper side of the clamping block body for engaging with an adjusting cover plate, and a bolt mounting hole is provided through the middle of the clamping block body.

[0007] To further optimize this utility model, the following technical solutions may be preferred:

[0008] Preferably, the locking boss is square or ring-shaped.

[0009] Preferably, a steel sleeve is also embedded in the bottom of the clamping block body at the position corresponding to the clamping boss.

[0010] Preferably, a boss is provided on the lower iron pad at the position corresponding to the periphery of the elongated hole, and an installation groove is provided at the bottom of the clamping block body to fit tightly with the boss, and the cross-section of the installation groove is trapezoidal.

[0011] Preferably, the clamping flange is L-shaped.

[0012] Preferably, a locking boss is provided at the bottom of the clamping block body corresponding to the bolt mounting hole, and a rectangular locking hole that cooperates with the locking boss is provided on the lower iron pad.

[0013] Preferably, a rectangular mounting groove is provided at the bottom of the clamping block body corresponding to the bolt mounting hole position, and a rectangular locking boss that cooperates with the rectangular mounting groove is provided on the lower iron pad.

[0014] The insulating clamping block for vibration damping fasteners provided by this utility model achieves a deep integration of electrical isolation, vibration reduction and noise reduction, mechanical strength and track gauge adjustment functions through the coordinated design of material selection and structural innovation. Specifically, it embodies the following multi-dimensional technical advantages:

[0015] (1) High reliability insulation protection: The body of the clamping block is integrally molded with high-strength insulating composite material (such as glass fiber reinforced nylon), which fundamentally blocks the current conduction path between the rail and the sleeper and eliminates the risk of short circuit in the track circuit; through the interference fit between the clamping boss and the long hole of the lower iron pad, and the trapezoidal cross-section nesting structure of the mounting groove and the boss (preferred solution), multiple physical isolation barriers are formed between the adjustment cover plate and the lower iron pad, which effectively suppresses surface discharge and creepage phenomena in humid environments.

[0016] (2) Efficient dissipation of vibration energy: The damping characteristics of the insulation material itself can absorb medium and high frequency vibration energy. Combined with the elastic deformation design of the L-shaped clamping flange (preferred solution), the transmission rate of vibration to the sleeper is further reduced. The combination structure of the bottom embedded steel sleeve (preferred solution) and the clamping boss, while maintaining the vibration reduction advantages of the non-metallic body, improves the impact fatigue resistance through local metal reinforcement, and extends the service life to more than twice that of traditional metal clamping blocks.

[0017] (3) Structural stability and ease of installation: The square / ring-shaped clamping boss (preferred solution) and the long hole of the lower iron plate form a self-locking effect, which, together with the axial fastening effect of the bolt mounting hole, makes the clamping block more stable under longitudinal vibration load; the sawtooth meshing design of the adjusting teeth and the adjusting cover plate allows the gauge to be finely adjusted by rotating the clamping block, and after adjustment, the positioning accuracy is ensured by the mechanical interlock between the clamping boss and the rectangular locking hole / boss (preferred solution), without the need for additional fasteners.

[0018] (4) Optimization of life cycle cost: The integrated structural design reduces the number of auxiliary components such as insulating pads and vibration damping pads, thereby reducing installation complexity and maintenance frequency; the combination design of steel sleeve and insulating body in the preferred scheme achieves local reinforcement in key stress parts (such as around bolt mounting holes), avoiding material waste caused by overall replacement. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the insulating clamping block in Example 1;

[0020] Figure 2 This is a cross-sectional view of the insulating crimping block without a steel sleeve in Example 1;

[0021] Figure 3 This is a cross-sectional view of the insulating clamping block with an embedded steel sleeve in Example 1.

[0022] Figure 4 This is a schematic diagram of the structure of the matching lower iron pad in Example 1;

[0023] Figure 5 This is a schematic diagram of the lower iron pad in Example 1;

[0024] Figure 6This is a schematic diagram of the mating state between the insulating clamping block and the iron pad in Example 1;

[0025] Figure 7 This is a cross-sectional view of the insulating clamping block with an embedded steel sleeve in Example 2;

[0026] Figure 8 This is a schematic diagram of the lower iron pad in Example 2;

[0027] Figure 9 This is a cross-sectional view of the insulating clamping block with an embedded steel sleeve in Example 3;

[0028] Figure 10 This is a schematic diagram of the lower iron pad in Example 3;

[0029] Figure 11 This is a schematic diagram of the insulating clamping block in Example 4;

[0030] Figure 12 This is a schematic diagram of the lower iron pad in Example 4;

[0031] Figure 13 This is a schematic diagram of the insulating clamping block in Example 5;

[0032] Figure 14 This is a schematic diagram of the structure of the lower iron pad in Example 5.

[0033] The components are: 1. Clamping block body; 2. Clamping flange; 3. Lower iron pad; 4. Clamping boss; 5. Adjustable tooth; 6. Bolt mounting hole; 7. Bayonet boss; 8. Mounting groove; 9. Steel sleeve; 10. Clamping boss; 11. Rectangular locking hole; 12. Rectangular mounting groove; 13. Rectangular locking boss; 14. Shoulder boss. Detailed Implementation

[0034] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This solution proposes an insulating clamping block for vibration damping fasteners, comprising a clamping block body 1. A clamping flange 2 is installed on one side of the top of the clamping block body for clamping an upper iron pad. When the insulating clamping block is installed in place, its clamping flange presses against the edge of the upper iron pad, exerting a downward clamping force on the upper iron pad, preventing rotation of the upper iron pad, and simultaneously separating the cover plate from the iron pad for insulation protection. A clamping boss 4 is installed on the lower side of the clamping block body, which tightly engages with the elongated hole of the lower iron pad 3. Adjusting teeth 5 are provided on the upper side of the clamping block body, which cooperate with the adjusting cover plate to adjust the overall position of the fastener. A bolt mounting hole 6 is provided through the middle of the clamping block body. The installation methods of insulating clamping blocks with different structures and iron pads vary; the following descriptions will elaborate on each installation method.

[0037] Example 1:

[0038] like Figures 1-6 In Example 1, this type of insulating clamping block is divided into two types: one with an embedded steel sleeve and the other without a steel sleeve. The rest of the structure is the same. One side of this insulating clamping block is designed with a clamping flange 2 for clamping the upper iron pad. The lower side of the insulating clamping block is provided with a clamping boss that can fit tightly with the long hole of the lower iron pad during installation, so that the insulating clamping block has a certain clamping force on the upper iron pad. The upper side of the insulating clamping block is provided with adjusting teeth, which cooperate with the adjusting cover plate to adjust the overall position of the fastener. The insulating clamping block separates the anchor bolt, the adjusting cover plate and the iron pad, thus playing an insulating and protective role.

[0039] Specifically, in this embodiment 1, the clamping boss 4 is designed as a ring, which fits tightly with the long hole of the lower iron pad.

[0040] Specifically, in this embodiment 1, a bayonet boss 7 is installed on the lower iron pad corresponding to the outer perimeter of the elongated hole. The bottom of the clamping block body is provided with an installation groove 8 that fits tightly with the bayonet boss. The cross-section of the installation groove is trapezoidal, which can fit tightly with the bayonet boss on the lower iron pad during installation. The trapezoidal cross-section of the installation groove and the bayonet boss form a conical self-locking structure, which can automatically compensate for wear of the contact surface under vibration.

[0041] Lower iron pad: The lower iron pad 3 has shoulder protrusions 14 symmetrically installed on both sides. The shoulder protrusions have fixing grooves 15 for locking and limiting the transverse stop blocks. The middle rubber pad on the lower iron pad is set to be embedded to reduce the installation height. The bolt mounting hole is provided with a tapered locking protrusion, which can be tightly fitted with the insulating clamping block.

[0042] Example 2:

[0043] The difference between this embodiment and embodiment 1 is that in this embodiment, a steel sleeve 9 is embedded in the bottom of the clamping block body 1 corresponding to the clamping boss position, and the installation groove design structure is eliminated.

[0044] Structural features of insulating crimp blocks:

[0045] Insulating clamping block: The insulating clamping block has a steel sleeve embedded inside. One side of the insulating clamping block is provided with a clamping flange for clamping the upper iron pad. The lower side of the insulating clamping block is provided with a clamping boss that can fit tightly with the elongated hole of the lower iron pad during installation, so that the insulating clamping block has a certain clamping force on the upper iron pad. The upper side of the insulating clamping block is provided with adjusting teeth, which cooperate with the adjusting cover plate to adjust the overall position of the fastener. The insulating clamping block separates the anchor bolt, adjusting cover plate and iron pad, thus playing an insulating and protective role.

[0046] Lower iron pad: The lower iron pad has symmetrical shoulder protrusions on both sides, and the protrusions have fixing grooves for locking and limiting the lateral stop blocks; the middle rubber pad on the iron pad is set to be embedded to reduce the installation height; the bolt mounting holes can fit tightly with the insulating clamping block.

[0047] Example 3:

[0048] The difference between this embodiment and embodiment 1 is that the clamping boss of the insulating clamping block in this embodiment is designed to be square, which fits tightly with the elongated hole of the lower iron pad.

[0049] Insulating clamping block: This insulating clamping block has no steel sleeve inside. A clamping flange is provided on one side of the insulating clamping block to clamp the upper iron pad. An installation groove is opened on the insulating clamping block, which can fit tightly with the boss on the lower iron pad during installation, so that the insulating clamping block has a certain clamping force on the upper iron pad. An adjusting tooth is opened on the upper side of the insulating clamping block. The tooth cooperates with the adjusting cover plate to adjust the overall position of the fastener. The insulating clamping block separates the anchor bolt, the adjusting cover plate and the iron pad, thus playing an insulating and protective role.

[0050] Lower iron pad: The lower iron pad has symmetrical shoulder protrusions on both sides, and the protrusions have fixing grooves for locking and limiting the lateral stop blocks; the middle rubber pad on the iron pad is set to be embedded to reduce the installation height; the bolt mounting hole is provided with an L-shaped locking protrusion, which can be tightly fitted with the insulating clamping block.

[0051] Example 4:

[0052] The difference between this embodiment and embodiment 3 is that an insulating clamping block is added and a locking structure is added to the lower iron pad. Specifically, a locking boss 10 is installed at the bottom of the clamping block body corresponding to the bolt mounting hole position, and a rectangular locking hole 11 that cooperates with the locking boss is opened on the lower iron pad. Through the above structure, the lower iron pad can be tightly fitted with the insulating clamping block.

[0053] Structural features of insulating crimp blocks:

[0054] 1. Insulating clamping block: This insulating clamping block has no steel sleeve inside. One side of the insulating clamping block is provided with a clamping flange for clamping the upper iron pad. The lower side of the insulating clamping block is provided with a clamping boss that can fit tightly with the elongated hole of the lower iron pad during installation, so that the insulating clamping block has a certain clamping force on the upper iron pad. The upper side of the insulating clamping block is provided with adjusting teeth, which cooperate with the adjusting cover plate to adjust the overall position of the fastener. The insulating clamping block separates the anchor bolts, adjusting cover plate and iron pad, thus playing an insulating and protective role.

[0055] 2. Lower iron pad: The lower iron pad has symmetrical shoulder protrusions on both sides, and the protrusions have fixing grooves for locking and limiting the lateral stop blocks; the middle rubber pad on the iron pad is set to be embedded to reduce the installation height; the bolt mounting hole is provided with a rectangular locking hole, which can be tightly fitted with the insulating clamping block.

[0056] Example 5:

[0057] The difference between this embodiment and embodiment 4 lies in the engagement structure. In this embodiment, a rectangular mounting groove 12 is provided at the bottom of the clamping block body corresponding to the bolt mounting hole. A rectangular locking boss 13 that mates with the rectangular mounting groove is installed on the lower iron pad. Through the above structure, the lower iron pad can be tightly engaged with the insulating clamping block.

[0058] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An insulating clamping block for vibration damping fasteners, characterized in that: The fastener includes a clamping block body, a clamping flange for clamping an upper iron pad on one side of the top of the clamping block body, a clamping boss for tightly engaging with an elongated hole in the lower iron pad on the lower side of the clamping block body, adjusting teeth for cooperating with an adjusting cover plate to adjust the overall position of the fastener on the upper side of the clamping block body, and a bolt mounting hole penetrating through the middle of the clamping block body.

2. The insulating clamping block for vibration damping fasteners according to claim 1, characterized in that: The locking boss is square or ring-shaped.

3. The insulating clamping block for vibration damping fasteners according to claim 2, characterized in that: A steel sleeve is also embedded in the bottom of the clamping block body at the position corresponding to the clamping boss.

4. The insulating clamping block for vibration damping fasteners according to claim 1, characterized in that: A boss is provided on the lower iron pad corresponding to the periphery of the elongated hole. The bottom of the clamping block body is provided with an installation groove that fits tightly with the boss. The cross-section of the installation groove is trapezoidal.

5. An insulating clamping block for vibration damping fasteners according to claim 1, characterized in that: The buckling flange is L-shaped.

6. An insulating clamping block for vibration damping fasteners according to claim 1, characterized in that: The bottom of the clamping block body is provided with a clamping boss at the position corresponding to the bolt mounting hole, and the lower iron pad is provided with a rectangular locking hole that cooperates with the clamping boss.

7. An insulating clamping block for vibration damping fasteners according to claim 1, characterized in that: The bottom of the clamping block body is provided with a rectangular mounting groove corresponding to the bolt mounting hole, and the lower iron pad is provided with a rectangular locking boss that cooperates with the rectangular mounting groove.

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