Elastic split type retaining shoulder fastener system

Abstract

The utility model relates to the technical field of rail traffic, and provides an elastic split type retaining shoulder fastener system, which comprises an under-rail backing plate, an iron backing plate, an under-plate backing plate, a mounting seat, a screw spike, a first connecting bolt and an elastic strip, and the elastic strip, the iron backing plate and the under-plate backing plate are relatively fastened by adopting the split first connecting bolt and the split screw spike respectively. A first guide groove and a first fixing groove are formed in the mounting base and used for allowing the first connecting bolt to automatically slide into a fixed position in the locking process. According to the elastic split type retaining shoulder fastener system, the screw spikes and the first connecting bolts are used in cooperation, rapid installation and stable fixation of the fastener system are achieved, construction time is greatly shortened, the fastener structure is optimized, working efficiency is improved, cost is reduced, and the elastic split type retaining shoulder fastener system is suitable for popularization and application. And the requirements of a rail transit system on high-performance and low-cost fasteners are met.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, and in particular to a flexible split shoulder fastener system. Background Technology

[0002] With the rapid development of rail transit systems, rail fasteners, as an important component of the track structure, play a crucial role in ensuring the geometric shape of the track and improving the smoothness and comfort of train operation. In fastener design, vibration damping performance and structural stability are important indicators for evaluating the quality of fasteners. Currently, there are many types of fasteners on the market, which can be mainly divided into two categories based on whether their anchoring system and elastic bar system are separated: elastically separate fasteners and elastically non-separable fasteners.

[0003] Flexible, non-separable fasteners are widely used due to their simple structure, convenient installation, and low overall cost. These fasteners typically connect the spring clip and the iron base plate directly to each other using fasteners such as spiral spikes, forming a single integrated structure. However, when pursuing lower vertical stiffness to improve vibration damping, the spring clip will undergo significant deformation, leading to stress concentration, increasing the risk of spring clip breakage, and affecting the stability and service life of the fastener system.

[0004] Flexible, separate fasteners separate the anchoring system and the spring clip system by design, allowing the spring clip to move freely with the displacement of the iron pad. This effectively reduces the stress level of the spring clip, thus allowing for a lower vertical stiffness in the fastener system design, further improving vibration reduction performance. Although flexible, separate fasteners perform excellently in vibration reduction, their structure is relatively complex, increasing manufacturing costs and maintenance difficulty.

[0005] To address the issues of stress concentration in the elastic clips caused by reduced vertical stiffness in existing non-separable elastic fasteners, and the high cost of separable elastic fasteners, there is an urgent market need for a fastener system that can maintain structural stability, effectively disperse elastic clip stress, and is relatively low-cost. Currently, some attempts have been made to solve these problems through innovative designs, such as Chinese patent application number CN202023289528.5, which discloses a shoulder-embedded vibration-damping fastener. This patent application mentions a double-headed bolt vibration-damping design; however, this design still falls under the category of non-separable elastic fasteners and fails to fully utilize the advantages of separable fasteners.

[0006] Therefore, developing a new type of fastener system that can achieve elastic separation between the elastic clip and the iron pad to reduce stress, while maintaining a simple structure and controllable cost, has become a technical problem that urgently needs to be solved in the field of rail transit. Utility Model Content

[0007] In view of this, the present invention aims to propose a flexible split shoulder fastener system, which solves the shortcomings of the prior art through a unique design scheme and meets the needs of rail transit systems for high-performance, low-cost fasteners.

[0008] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0009] A flexible, split shoulder fastener system includes a rail underplate, a steel pad, and a plate underplate, wherein the rail underplate and the plate underplate are disposed on the upper and lower sides of the steel pad, and further includes:

[0010] Mounting bases are provided at both ends along the length of the iron pad, and a first guide groove and a first fixing groove are provided on the mounting bases;

[0011] The spiral rail spike passes through the first mounting hole in the iron pad and is spirally fastened to the sleeper;

[0012] The first connecting bolt includes a threaded part and a threaded head, wherein the threaded head slides in the first guide groove by rotation and extends into the first fixing groove to be limited in the vertical direction;

[0013] The spring bar is used to press the rail and can be tightened by the first connecting bolt.

[0014] Furthermore, the mounting base includes a first mounting boss and a second mounting boss, with a first receiving groove provided between the first mounting boss and the second mounting boss, and a first guide groove and a first fixing groove provided on both the first mounting boss and the second mounting boss, so that the screw head of the first connecting bolt rotates along the first guide groove and slides into the first fixing groove for vertical positioning.

[0015] Furthermore, the first guide groove on the first mounting boss is located on the side of the first fixing groove close to the rail, and the first guide groove on the second mounting boss is located on the side of the first fixing groove away from the rail.

[0016] Furthermore, the two first fixing slots are positioned at the midpoint of the length direction of the first receiving slot.

[0017] Furthermore, the screw head includes a first connecting portion and a second connecting portion, and a first limiting boss is formed at the connection between the first connecting portion and the second connecting portion.

[0018] Furthermore, the iron pad includes a first plate, two mounting seats are disposed at opposite ends of the central axis along the length direction of the first plate, and the first mounting hole is disposed on the first plate at the position corresponding to the first receiving groove.

[0019] Furthermore, a second receiving groove is provided at the upper end of the mounting base, the second receiving groove extending from the first mounting boss to the second mounting boss, for limiting the spring bar when it is pressed.

[0020] Furthermore, the mounting base and the iron pad are integrally formed.

[0021] Furthermore, the elastic split shoulder fastener system also includes a side baffle. The lower end plate of the side baffle extends under the iron pad and limits the pad under the plate in the length direction. A first connecting hole is provided on the lower end plate. The spiral rail spike passes through the first connecting hole and is screwed to the sleeper. The spiral rail spike and the screw portion of the first connecting bolt are collinear in the vertical direction.

[0022] Furthermore, an adjustment block is provided between the side baffle and the mounting base, and a gauge block is provided between the elastic bar and the rail.

[0023] Compared with the prior art, the elastic split shoulder fastener system of this utility model has the following advantages:

[0024] (1) The elastic split shoulder fastener system described in this utility model achieves rapid installation and stable fixation of the fastener system through the cooperation of the spiral road spike and the first connecting bolt, which greatly shortens the construction time. The guide groove and fixing groove design on the mounting seats at both ends of the iron pad in the length direction ensures that the first connecting bolt can automatically slide into the fixed position during the tightening process, effectively avoiding installation errors and enhancing the overall stability of the fastener system.

[0025] (2) The elastic split shoulder fastener system described in this utility model optimizes the fastener structure, improves work efficiency, reduces costs, and meets the needs of rail transit systems for high-performance, low-cost fasteners. Attached Figure Description

[0026] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0027] Figure 1 This is a side view of the elastic split shoulder fastener system described in an embodiment of the present invention.

[0028] Figure 2 This is a front view structural diagram of the elastic split shoulder fastener system described in an embodiment of the present utility model;

[0029] Figure 3 This is a partial cross-sectional view of the elastic split shoulder fastener system described in this embodiment of the present invention.

[0030] Figure 4 This is a partially exploded structural diagram of the elastic split shoulder fastener system described in an embodiment of the present invention;

[0031] Figure 5 This is a side view of the iron pad described in an embodiment of the present utility model;

[0032] Figure 6 This is a side view of the iron pad from a second perspective in an embodiment of the present invention.

[0033] Figure 7 This is a top view of the iron pad described in an embodiment of the present utility model;

[0034] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of AA;

[0035] Figure 9 This is a side view of the first connecting bolt in an embodiment of the present invention.

[0036] Figure 10 This is a front view of the first connecting bolt in an embodiment of the present invention;

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Rail; 2-Rail pad; 3-Iron pad; 301-First plate; 302-First mounting hole; 4-Plate pad; 5-First connecting bolt; 501-Screw part; 502-Screw head; 5021-First connecting part; 5022-Second connecting part; 5023-First limiting boss; 6-Spiral spike; 7-Elastic strip; 8-Side baffle; 801-Lower end plate; 802-First connecting hole; 9-Adjusting block; 10-Gap block; 11-Sleeper; 12-Mounting base; 1201-First mounting boss; 1202-Second mounting boss; 1203-First receiving groove; 1204-First fixing groove; 1205-First guide groove; 1206-Second receiving groove. Detailed Implementation

[0039] To make the technical means and objectives and effects of this utility model easier to understand, the embodiments of this utility model will be described in detail below with reference to specific figures.

[0040] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connection arrangements between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; 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 utility model based on the specific circumstances.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] like Figures 1-10 As shown, this application discloses a flexible, split shoulder fastener system, including a rail underplate 2, a steel pad 3, and a plate underplate 4. The rail underplate 2 and the plate underplate 4 are disposed on the upper and lower sides of the steel pad 3, and further include:

[0044] Mounting base 12 is provided at both ends of the iron pad 3 along its length. A first guide groove 1205 and a first fixing groove 1204 are provided on the mounting base 12.

[0045] The spiral rail spike 6 passes through the first mounting hole 302 on the iron pad 3 and is spirally fastened to the sleeper 11;

[0046] The first connecting bolt 5 includes a screw portion 501 and a screw head 502. The screw head 502 slides in the first guide groove 1205 by rotation and extends into the first fixing groove 1204 to be limited in the vertical direction.

[0047] The spring bar 7 is used to press the rail 1 and can be pressed by the first connecting bolt 5.

[0048] This application discloses a flexible split shoulder fastening system. Mounting seats 12 are provided at both ends of the iron pad 3. The elastic strip 7, iron pad 3, and under-plate pad 4 are respectively fastened by split first connecting bolts 5 and spiral rail spikes 6. One end of the elastic strip 7 is fastened to the rail 1, and the other end is fastened to the mounting seat 12 and locked by the first connecting bolt 5. The mounting seat 12 is designed with a first guide groove 1205 and a first fixing groove 1204. The first connecting bolt 5 used to fix the elastic strip 7 can automatically slide into the fixed position during the locking process, which effectively avoids installation errors and enhances the overall stability of the fastening system. At the same time, the spiral rail spikes 6 pass through the first mounting holes 302 on the iron pad 3 and are spirally fastened to the sleeper 11, providing a basic fixation for the entire fastening system and ensuring the stability and accuracy of the rail 1 fixation.

[0049] The flexible split shoulder fastener system disclosed in this application achieves rapid installation and stable fixation of the fastener system through the cooperation of the spiral track spike 6 and the first connecting bolt 5, which greatly shortens the construction time and improves work efficiency. The guide groove and fixing groove design on the mounting seats 12 at both ends of the iron pad 3 in the length direction ensures that the first connecting bolt 5 can automatically slide into the fixed position during the tightening process, effectively avoiding installation errors, enhancing the overall stability of the fastener system, and facilitating later maintenance and adjustment. When it is necessary to adjust the track gauge or carry out maintenance, it can be easily done by simply loosening the first connecting bolt 5 without disassembling the entire fastener system, which greatly reduces the difficulty and cost of maintenance.

[0050] As a preferred example of this application, the mounting base 12 includes a first mounting boss 1201 and a second mounting boss 1202. A first receiving groove 1203 is provided between the first mounting boss 1201 and the second mounting boss 1202. A first guide groove 1205 and a first fixing groove 1204 are provided on both the first mounting boss 1201 and the second mounting boss 1202, so that the screw head 502 of the first connecting bolt 5 rotates along the first guide groove 1205 and slides into the first fixing groove 1204 for vertical positioning.

[0051] This design discloses a specific structure of the mounting base 12. The mounting base 12 includes a first mounting boss 1201 and a second mounting boss 1202, with a first receiving groove 1203 formed between them. Furthermore, a first guide groove 1205 and a first fixing groove 1204 are designed on the sides of the first mounting boss 1201 and the second mounting boss 1202 near the first receiving groove 1203. The first guide groove 1205 and the first fixing groove 1204 on the same side are connected. This allows the threaded head 502 of the first connecting bolt 5 to easily rotate along the first guide groove 1205 during installation and disassembly until it precisely slides into the first fixing groove 1204, achieving vertical stability and limiting. This makes the installation process of the first connecting bolt 5 intuitive and easy to operate, significantly reducing installation difficulty and improving work efficiency. Simultaneously, this design ensures that the first connecting bolt 5 can automatically correct its position during tightening, avoiding system loosening due to improper installation, thereby enhancing the overall stability of the fastener system. In addition, the design also facilitates subsequent maintenance work. Whether it is routine inspection or track gauge adjustment, it can be completed more quickly and efficiently, reducing potential safety hazards caused by improper maintenance and providing strong protection for the safe operation of rail transit.

[0052] As a preferred example of this application, the first guide groove 1205 on the first mounting boss 1201 is located on the side of the first fixing groove 1204 near the rail 1, and the first guide groove 1205 on the second mounting boss 1202 is located on the side of the first fixing groove 1204 away from the rail 1. This arrangement allows the two first guide grooves 1205 to be designed in opposite directions on the first mounting boss 1201 and the second mounting boss 1202, so that the thread head 502 of the first connecting bolt 5 extends into the first fixing groove 1204 for limitation when rotated to the end of the first guide groove 1205. This makes the bolt installation process more intuitive and easier to operate, simplifies the installation steps, reduces the skill requirements of the installers, and improves the installation efficiency. At the same time, it also strengthens the strength of the mounting seat 12 in limiting and guiding the thread head 502 and ensuring a stable connection, which helps to maintain the accuracy of the track gauge and the safety of rail transit.

[0053] As a preferred example of this application, the two first fixing slots 1204 are positioned at the midpoint of the length direction of the first receiving slot 1203. In this example, the length direction of the first receiving slot 1203 is the same as the length direction of the iron pad 3, which is perpendicular to the length laying direction of the rail 1. This design ensures that when the threaded head 502 of the first connecting bolt 5 is inserted and rotated to the end of the first guide slot 1205, it can accurately fall into the first fixing slot 1204 at the midpoint, achieving stable fixation. It also better disperses the force on the bolt, reducing stress concentration and extending the service life of the fastening system. Furthermore, the first fixing slot 1204 at the midpoint makes the installation process more standardized and uniform, reducing installation errors caused by positional deviations and improving work efficiency.

[0054] As an example of this application, the screw head 502 includes a first connecting portion 5021 and a second connecting portion 5022, and a first limiting boss 5023 is formed at the connection between the first connecting portion 5021 and the second connecting portion 5022. As a specific example of this application, both the first connecting portion 5021 and the second connecting portion 5022 are generally rectangular in shape, and a guide arc is provided in their length direction to facilitate the smooth sliding of the screw head 502 within the first guide groove 1205 and ensure the reliability of its limiting position within the first fixing groove 1204.

[0055] As a preferred example of this application, the iron pad 3 includes a first plate 301, which is generally rectangular in shape. Two mounting seats 12 are located at opposite ends of the central axis along the length of the first plate 301, and the first mounting hole 302 is located on the first plate 301 at the corresponding position of the first receiving groove 1203. By symmetrically arranging the two mounting seats 12 at both ends of the central axis along the length of the first plate 301, this layout ensures that the fastening system is subjected to uniform force, improving overall stability. Simultaneously, the first mounting hole 302 is precisely located on the first plate 301 at the position corresponding to the first receiving groove 1203, ensuring that the first connecting bolt 5 and the spiral spike 6 are collinear in the vertical direction. This simplifies the installation process, reduces the skill requirements for installers, and improves the accuracy and efficiency of installation, ensuring the stability and safety of the fastening system.

[0056] As a preferred example of this application, a second receiving groove 1206 is provided at the upper end of the mounting base 12. The second receiving groove 1206 extends from the first mounting boss 1201 to the second mounting boss 1202 and is used to limit the spring clip 7 when it is snapped in. In the example of this application, the spring clip 7 is an ω spring clip. One end of the ω spring clip is pressed onto the rail 1, and the other end is inserted into the second receiving groove 1206 of the mounting base 12 and limited by the threaded portion 501 of the first connecting bolt 5 away from the nut and washer at the threaded head 502.

[0057] This setting, by adding a second receiving groove 1206 to the mounting base 12, achieves precise positioning of the elastic clip 7, effectively preventing the elastic clip 7 from loosening due to vibration or impact, improving the reliability and durability of the fastening system, significantly enhancing the dynamic stability of the fastening system during train operation, reducing track geometry changes caused by fastener loosening, and ensuring smooth train operation and passenger comfort.

[0058] As a preferred example of this application, the mounting base 12 and the iron pad 3 are integrally formed. This design enables the mounting base 12 and the iron pad 3 to form a stable integral structure, making the force distribution and transmission of the entire fastening system more uniform and efficient. It effectively avoids performance degradation caused by loosening or separation of components. At the same time, it simplifies the production process and installation procedure of the fastening system, reduces production costs and time, and brings more economic benefits to rail transit construction.

[0059] As a preferred example of this application, the elastic split shoulder fastening system further includes a side baffle 8. The lower end plate 801 of the side baffle 8 extends below the iron pad 3 and limits the length of the under-plate pad 4. A first connecting hole 802 is provided on the lower end plate 801. The spiral rail spike 6 passes through the first connecting hole 802 and is screwed to the sleeper 11. The spiral rail spike 6 and the screw portion 501 of the first connecting bolt 5 are collinear in the vertical direction. This arrangement, by introducing an independent side baffle 8 structure and tightly combining it with the iron pad 3, the under-plate pad 4, and the sleeper 11, effectively prevents the under-plate pad 4 from shifting or deforming during long-term use, ensuring the long-term stability of the fastening system. The collinear design of the spiral rail spike 6 and the first connecting bolt 5 not only simplifies the installation steps and improves construction efficiency, but also further enhances the structural strength of the fastening system, enabling it to better withstand the impact and vibration brought by train operation.

[0060] As a preferred example of this application, an adjusting block 9 is provided between the side baffle 8 and the mounting base 12, and a gauge block 10 is provided between the elastic strip 7 and the rail 1. The adjusting block 9, by finely adjusting its thickness, can precisely adjust the distance between the side baffle 8 and the mounting base 12, thereby achieving fine-tuning of the overall dimensions of the fastening system. The gauge block 10, located between the elastic strip 7 and the rail 1, allows for convenient adjustment of the rail gauge 1 by replacing different specifications of gauge blocks 10 to meet different track laying requirements. The addition of these two structures makes the adjustment of the fastening system more flexible and precise.

[0061] Given the structural form and fixing method of the rail underplate 2, iron pad 3, and plate underplate 4 in the fastening system, as well as the fixing method of the rail by the elastic clip, the form of fastening to the sleeper by bolts is quite common, and there are many corresponding disclosures in the prior art. The above-mentioned content is not the improvement point of this application, and will not be elaborated on further here.

[0062] The flexible split shoulder fastener system described in this application adopts a flexible split design, achieving relative fastening of each component through separate connecting parts, enhancing the overall stability of the fastener system, and optimizing the installation and fixing method of the fastener system. By setting mounting seats at both ends of the iron base plate and opening the first guide groove and the first fixing groove on them, the first connecting bolts are effectively guided and fixed, ensuring accurate alignment and stable connection during the installation process of the fastener system. The system has a compact structure and is easy to install, achieving optimization of the fastener system installation and performance improvement. It achieves the overall effect of improving installation efficiency, enhancing system stability, extending service life, and improving the track operating environment, providing a strong guarantee for the safe and efficient operation of rail transit.

[0063] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flexible, split shoulder fastener system, comprising a rail underplate (2), an iron pad (3), and a plate underplate (4), wherein the rail underplate (2) and the plate underplate (4) are disposed on the upper and lower sides of the iron pad (3), characterized in that, Also includes: Mounting base (12) is provided at both ends of the iron pad (3) in the length direction. A first guide groove (1205) and a first fixing groove (1204) are provided on the mounting base (12). The spiral spike (6) passes through the first mounting hole (302) on the iron pad (3) and is spirally fastened to the sleeper (11); The first connecting bolt (5) includes a screw part (501) and a screw head (502). The screw head (502) slides in the first guide groove (1205) by rotation and extends into the first fixing groove (1204) to be limited in the vertical direction. The spring bar (7) is used to press the rail (1) and can be pressed by the first connecting bolt (5).

2. The elastic split shoulder fastener system according to claim 1, characterized in that, The mounting base (12) includes a first mounting boss (1201) and a second mounting boss (1202). A first receiving groove (1203) is provided between the first mounting boss (1201) and the second mounting boss (1202). A first guide groove (1205) and a first fixing groove (1204) are provided on the first mounting boss (1201) and the second mounting boss (1202), respectively, so that the screw head (502) of the first connecting bolt (5) rotates along the first guide groove (1205) and slides into the first fixing groove (1204) for vertical positioning.

3. The elastic split shoulder fastener system according to claim 2, characterized in that, The first guide groove (1205) on the first mounting boss (1201) is located on the side of the first fixing groove (1204) close to the rail (1), and the first guide groove (1205) on the second mounting boss (1202) is located on the side of the first fixing groove (1204) away from the rail (1).

4. The elastic split shoulder fastener system according to claim 2, characterized in that, The two first fixing slots (1204) are located at the middle position along the length of the first receiving slot (1203).

5. The elastic split shoulder fastener system according to claim 2, characterized in that, The screw head (502) includes a first connecting part (5021) and a second connecting part (5022), and a first limiting boss (5023) is formed at the connection between the first connecting part (5021) and the second connecting part (5022).

6. The elastic split shoulder fastener system according to claim 2, characterized in that, The iron pad (3) includes a first plate (301), two mounting seats (12) are disposed at opposite ends of the central axis of the first plate (301) in the length direction, and the first mounting hole (302) is disposed on the first plate (301) at the corresponding position of the first receiving groove (1203).

7. The elastic split shoulder fastener system according to claim 2, characterized in that, A second receiving groove (1206) is provided at the upper end of the mounting base (12). The second receiving groove (1206) extends from the first mounting boss (1201) to the second mounting boss (1202) and is used to limit the spring bar (7) when it is pressed.

8. The elastic split shoulder fastener system according to any one of claims 1 to 7, characterized in that, The mounting base (12) and the iron pad (3) are integrally formed.

9. The elastic split shoulder fastener system according to claim 8, characterized in that, The elastic split shoulder fastener system also includes a side baffle (8), the lower end plate (801) of the side baffle (8) extends under the iron pad (3) and limits the pad (4) under the plate in the length direction. A first connecting hole (802) is provided on the lower end plate (801). The spiral rail spike (6) passes through the first connecting hole (802) and is screwed to the sleeper (11). The spiral rail spike (6) and the screw part (501) of the first connecting bolt (5) are collinear in the vertical direction.

10. The elastic split shoulder fastener system according to claim 9, characterized in that, An adjustment block (9) is provided between the side baffle (8) and the mounting base (12), and a gauge block (10) is provided between the elastic bar (7) and the rail (1).

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