Nut anti-loosening device for railway turnout

Abstract

The utility model discloses a nut anti -loose device for railway turnout, including steel rail packing ring, installation component, bolt, nut and anti -loose component, steel rail packing ring is used for installing in the steel rail waist, and installation component is connected with steel rail packing ring, and bolt is used for being in order to be provided in steel rail, steel rail packing ring and installation component, and the free end of nut and bolt is screwed, and anti -loose component is detachably connected with installation component, and anti -loose component is set up with the anti -loose cavity of the outer wall of nut for setting up in the nut outer for limiting the rotation of nut in profile. The scheme adopts mechanical type anti -loose device, and the installation dismounting operation is convenient, and relative to prior art, while ensuring that the nut assembly is convenient, the anti -loose effect of nut is good, and the practicality is strong, is suitable for extensive promotion and application.

Description

Technical Field

[0001] This utility model relates to the field of railway turnout technology, and in particular, to a nut anti-loosening device for railway turnouts. Background Technology

[0002] Rail washers are an important component of railway track systems, primarily used to connect rails, sleepers, and other track components, serving to fix, dampen vibrations, adjust, and protect them. The nuts on rail washers are subjected to the impact of trains passing through turnouts over long periods. During use, severe vibrations can cause the nuts to loosen or even fall off, increasing the workload of turnout maintenance and seriously affecting traffic safety. Therefore, anti-loosening devices are often installed on rail washers to prevent the nuts from loosening during long-term use.

[0003] For example, Chinese utility model patent CN209276909U discloses a device for preventing the loosening of railway turnout bolts and nuts, including an anti-rotation cover plate and an anti-rotation base plate. The turnout bolt passes through the anti-rotation cover plate and the anti-rotation base plate and is fixed by the turnout nut. The anti-rotation cover plate has polygonal slots that engage with the edges of the turnout bolt or turnout nut to form a restraining relationship. The anti-rotation cover plate and the anti-rotation base plate are detachably connected to each other. The anti-rotation cover plate has side plates extending towards the anti-rotation base plate along both sides of its lateral direction. This device can improve the anti-loosening stability and strength of the turnout bolt or turnout nut; that is, the polygonal slots on the anti-rotation cover plate restrict the loosening of the nut.

[0004] For example, Chinese invention application CN103806349A discloses a special anti-loosening mechanism for railway turnout nuts. A rail washer is fixed to the rail web by a bolt and nut. An anti-rotation washer, fitted onto the bolt and nut, is connected to the rail washer via a cotter pin, thus restricting the rotation of the nut in the loosening direction and achieving a self-locking function. Its advantages are: firstly, it is a simple and easy-to-operate mechanical bolt and nut anti-loosening mechanism that effectively solves the long-standing problem of bolt and nut loosening that has plagued turnout maintenance departments. Moreover, the bolts and nuts can continue to be used during maintenance or after disassembly and adjustment, greatly reducing turnout costs; secondly, it contributes to the durability, safety, and low maintenance of railway turnouts; thirdly, the device has a significant anti-loosening effect, which can greatly reduce the maintenance workload of turnout maintenance departments and meet the needs of rapid railway development. The anti-rotation washer is an inner dodecagon, fitted onto a hexagonal nut, restricting the nut's rotation while being unaffected by the nut's installation state. In other words, an inner dodecagonal anti-rotation washer is used to restrict the nut.

[0005] However, in actual use, in order to ensure easy assembly, the polygonal bayonet or inner dodecagon often leaves a considerable gap between the nut and the above solution, resulting in poor anti-loosening effect on the nut. Under long-term friction, the nut will still loosen. Utility Model Content

[0006] This utility model provides a nut anti-loosening device for railway turnouts to solve the technical problem of poor anti-loosening effect of existing anti-loosening devices.

[0007] According to one aspect of the present invention, a nut anti-loosening device for railway turnouts is provided, comprising a rail washer, an installation component, a bolt, a nut, and an anti-loosening component. The rail washer is used to be installed on the web of the rail. The installation component is connected to the rail washer. The bolt is used to sequentially pass through the rail, the rail washer, and the installation component. The nut is threadedly connected to the free end of the bolt. The anti-loosening component is detachably connected to the installation component. The anti-loosening component has an anti-loosening cavity that conforms to the outer wall of the nut and is used to fit around the nut to restrict its rotation.

[0008] As a further improvement to the above technical solution:

[0009] Furthermore, the anti-loosening component includes an anti-loosening plate and a cotter pin. The anti-loosening plate is inserted into the mounting component and has a conforming opening that mimics the outer wall of the nut. The cotter pin is connected to the open end of the anti-loosening plate to close the conforming opening and prevent the anti-loosening plate from loosening.

[0010] Furthermore, the anti-loosening plate has two limiting holes for engaging with cotter pins, and the two limiting holes are coaxially arranged on opposite sides of the open end of the anti-loosening plate.

[0011] Furthermore, the anti-loosening plate includes two mounting parts arranged in an L-shape and interlocking with the mounting assembly, the two mounting parts being spaced apart on opposite sides of the anti-loosening plate.

[0012] Furthermore, the turning points of the installation section are arranged with chamfers.

[0013] Furthermore, the mounting assembly includes a base connected to the rail washer and a universal joint connected to the base and the anti-loosening component respectively. The base has a toothed inner cavity, and the universal joint has a toothed boss for engaging with the toothed inner cavity.

[0014] Furthermore, the universal joint includes two connecting slots that engage with the anti-loosening component, the two connecting slots being spaced apart on opposite sides of the universal joint.

[0015] Furthermore, the rail washer is provided with a receiving groove for accommodating the base.

[0016] Furthermore, the bottom of the receiving tank is arranged at an angle.

[0017] Furthermore, the anti-loosening device also includes a flat washer positioned between the mounting component and the nut.

[0018] This utility model has the following beneficial effects:

[0019] This utility model discloses a nut anti-loosening device for railway turnouts. A rail washer is installed on the rail web, and an installation component is arranged on the rail washer. Bolts are sequentially inserted into the rail, rail washer, and installation component, allowing the nut to be threadedly connected to the free end of the bolt. After the nut is tightened, the anti-loosening component is connected to the installation component. The anti-loosening cavity, which is shaped like the outer wall of the nut, is fitted over the nut, so that the inner wall of the anti-loosening cavity of the anti-loosening component fits against the outer wall of the nut. This fitted anti-rotation method minimizes the gap between the nut and the anti-loosening component, thereby improving the anti-loosening effect on the nut and significantly reducing the maintenance workload of railway turnouts. The loosening force of the nut is transmitted sequentially to the rail washer via the anti-loosening component and the installation component, ensuring that the anti-loosening device has sufficient strength to overcome the loosening force and guaranteeing the reliability of the anti-loosening device installation. During nut installation, the anti-loosening component separates from the installation component, and the nut is not interfered with by the anti-loosening component, making assembly convenient. After the nut is installed, the anti-loosening component is fitted onto the outside of the nut through the anti-loosening cavity to restrict the rotation of the nut. This solution adopts a mechanical anti-loosening device, which is convenient to install and disassemble. Compared with existing technologies, it ensures convenient nut assembly while providing a better anti-loosening effect, making it highly practical and suitable for widespread promotion and application.

[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of the usage state of the railway turnout nut anti-loosening device according to a preferred embodiment of this utility model;

[0023] Figure 2 This is an exploded view of the operating state of the railway turnout nut anti-loosening device according to a preferred embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the rail washer in the railway turnout nut anti-loosening device according to a preferred embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the base structure in the railway turnout nut anti-loosening device according to a preferred embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the universal joint in the railway turnout nut anti-loosening device according to a preferred embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the anti-loosening plate in the anti-loosening device for railway turnout nuts according to a preferred embodiment of this utility model.

[0028] Legend:

[0029] 100. Rail washer; 110. Receiving groove; 200. Mounting assembly; 210. Base; 211. Toothed inner cavity; 220. Universal joint; 221. Toothed boss; 222. Connecting groove; 300. Bolt; 400. Nut; 500. Anti-loosening assembly; 510. Anti-loosening plate; 511. Contour opening; 512. Limiting hole; 513. Mounting part; 520. Cotter pin; 600. Flat washer. Detailed Implementation

[0030] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0031] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” or “containing,” and similar terms mean that the element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or “connected,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0033] like Figure 1 and Figure 2As shown, the anti-loosening device for railway turnout nuts in this embodiment includes a rail washer 100, an mounting assembly 200, a bolt 300, a nut 400, and an anti-loosening assembly 500. The rail washer 100 is installed on the rail web. The mounting assembly 200 is connected to the rail washer 100. The bolt 300 is sequentially inserted through the rail, the rail washer 100, and the mounting assembly 200. The nut 400 is threaded to the free end of the bolt 300. The anti-loosening assembly 500 is detachably connected to the mounting assembly 200. The anti-loosening assembly 500 has an anti-loosening cavity that conforms to the outer wall of the nut 400 and is fitted over the nut 400 to restrict its rotation.

[0034] like Figure 1 and Figure 2 As shown, specifically, the railway turnout nut anti-loosening device of this utility model includes a rail washer 100 installed on the rail web, and an installation component 200 arranged on the rail washer 100. Bolts 300 are sequentially inserted through the rail, rail washer 100, and installation component 200, allowing the nut 400 to be threadedly connected to the free end of the bolt 300. After the nut 400 is tightened, the anti-loosening component 500 is connected to the installation component 200. An anti-loosening cavity, conforming to the outer wall of the nut 400, is fitted over the nut 400, ensuring the inner wall of the anti-loosening cavity of the anti-loosening component 500 fits snugly against the outer wall of the nut 400. This snug fit minimizes the gap between the nut 400 and the anti-loosening component 500, thereby improving the anti-loosening effect on the nut 400 and significantly reducing maintenance costs for railway turnouts. This reduces maintenance workload; the loosening force of nut 400 is transmitted sequentially to rail washer 100 via anti-loosening component 500 and mounting component 200, ensuring sufficient strength of the anti-loosening device to overcome the loosening force of nut 400 and ensuring the reliability of the anti-loosening device installation; during the installation of nut 400, anti-loosening component 500 is separated from mounting component 200, and nut 400 is not interfered with by anti-loosening component 500, making assembly convenient; after nut 400 is installed, anti-loosening component 500 is fitted over nut 400 through anti-loosening cavity to restrict nut 400 rotation; this solution adopts a mechanical anti-loosening device, which is convenient to install and disassemble, and compared with existing technology, it ensures convenient assembly of nut 400 while providing good anti-loosening effect, strong practicality, and is suitable for widespread promotion and application.

[0035] like Figure 1 , Figure 2 and Figure 6As shown, in this embodiment, the anti-loosening component 500 includes an anti-loosening plate 510 and a cotter pin 520. The anti-loosening plate 510 is inserted into the mounting component 200 and has a contoured opening 511 that conforms to the outer wall of the nut 400. The cotter pin 520 is connected to the open end of the anti-loosening plate 510 to close the contoured opening 511 and prevent the anti-loosening plate 510 from loosening. Specifically, after the nut 400 is tightened, the anti-loosening plate 510 is connected to the mounting component 200. At the same time, the anti-loosening plate 510 is fitted onto the outer wall of the nut 400 through the contoured opening 511 to restrict the rotation of the nut 400. Then, the cotter pin 520 is connected to the open end of the anti-loosening plate 510 to close the contoured opening 511 and prevent the anti-loosening plate 510 from loosening from the mounting component 200, thereby ensuring the reliability of the anti-loosening device after installation; that is, after the anti-loosening plate 510 is inserted into the mounting component 200 along the first horizontal direction, a second... After limiting the horizontal, circumferential, and vertical directions, the cotter pin 520 is used to cooperate with the anti-loosening plate 510 and the nut 400 respectively to limit the anti-loosening plate 510 in the first horizontal direction, thereby preventing the anti-loosening plate 510 from loosening. This enables the anti-loosening component 500 to be detachably connected to the mounting component 200. By removing the cotter pin 520, the anti-loosening plate 510 can be loosened from the mounting component 200 along the first horizontal direction. This ensures that the anti-loosening device can maintain its anti-loosening function even after repeated use during the frequent maintenance and repair of the nut 400.

[0036] In this embodiment, the end face of the rail washer 100 facing the rail is shaped to resemble the rail web to improve the reliability of the rail washer 100 after installation.

[0037] It should be understood that the first and second horizontal directions are arranged perpendicularly.

[0038] In this embodiment, the outer wall of the nut 400 is arranged in a hexagonal shape, that is, a hexagonal nut 400. The anti-loosening opening is shaped like the four sides of the outer wall of the nut 400, and the remaining two sides are openings, so that the anti-loosening plate 510 can be connected to the mounting component 200 and then fitted onto the outside of the nut 400.

[0039] like Figure 6 As shown, in this embodiment, the anti-loosening plate 510 has two limiting holes 512 for engaging with the cotter pin 520. The two limiting holes 512 are coaxially arranged on opposite sides of the open end of the anti-loosening plate 510. Specifically, after the anti-loosening plate 510 is connected to the mounting assembly 200 and fitted onto the outer wall of the nut 400, the cotter pin 520 is inserted into the two limiting holes 512 in sequence to engage with the nut 400, preventing the anti-loosening plate 510 from loosening from the mounting assembly 200.

[0040] like Figure 6As shown, in this embodiment, the anti-loosening plate 510 includes two mounting portions 513 arranged in an L-shape and interlocking with the mounting assembly 200. The two mounting portions 513 are spaced apart on opposite sides of the anti-loosening plate 510. Specifically, by simultaneously interlocking the two mounting portions 513 with the mounting assembly 200 along the first horizontal direction, the anti-loosening plate 510 can be limited in the second horizontal direction, circumferential direction, and height direction. The L-shaped arrangement of the mounting portions 513 allows for a slight installation space between the central area of ​​the anti-loosening plate 510 and the mounting assembly 200, facilitating the installation of the flat washer 600.

[0041] like Figure 6 As shown, in this embodiment, the turning point of the mounting part 513 is chamfered. Specifically, by chamfering the turning point of the mounting part 513, interference between the components is minimized during the insertion and engagement of the mounting part 513 and the mounting assembly 200, ensuring smooth insertion and facilitating repeated disassembly during maintenance.

[0042] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment, the mounting assembly 200 includes a base 210 connected to the rail washer 100 and a universal seat 220 connected to the base 210 and the anti-loosening assembly 500 respectively. The base 210 has a toothed inner cavity 211, and the universal seat 220 has a toothed boss 221 for engaging with the toothed inner cavity 211. Specifically, during the installation of some nuts 400, there are corresponding torque requirements, which results in the final fixing direction of the nuts 400 being random. After the base 210 is connected to the rail washer 100, the toothed inner cavity 211 and the toothed boss 221 engage to adjust the installation position of the universal joint 220 relative to the base 210 according to the final fixing direction of the nuts 400 before installation. Thus, after the nuts 400 are fixed with the set torque and the anti-loosening component 500 is connected to the universal joint 220, the anti-loosening cavity still matches the nuts 400, achieving anti-loosening of the nuts 400 to meet the actual needs of the assembly site. That is, the torque requirements of the nuts 400 are met without affecting the anti-loosening effect of the nuts 400, achieving universal installation of the nuts 400.

[0043] In this embodiment, the rail washer 100, the base 210 and the universal joint 220 are all centrally provided with through holes that are coaxially arranged with the mounting holes on the rail web, so that the bolt 300 can be sequentially inserted into the rail, the rail washer 100, the base 210 and the universal joint 220, thereby cooperating with the nut 400 for connection.

[0044] like Figure 5As shown, in this embodiment, the universal joint 220 includes two connecting slots 222 that engage with the anti-loosening component 500. The two connecting slots 222 are spaced apart on opposite sides of the universal joint 220. Specifically, the universal joint 220 has a connecting portion that extends upward to a preset height and then horizontally to a preset distance. The connecting portion and the main body of the universal joint 220 enclose the connecting slots 222 to form the connecting slots 222. By engaging with the anti-loosening component 500 through the two connecting slots 222, the second horizontal, circumferential, and height directions of the anti-loosening component 500 are limited.

[0045] like Figure 1 As shown, in this embodiment, the mounting portion 513 of the anti-loosening plate 510 is inserted into the connecting groove 222 along the first horizontal direction.

[0046] In this embodiment, the connecting part and the connecting groove 222 are arranged in a one-to-one correspondence.

[0047] like Figure 3 As shown, in this embodiment, the rail washer 100 has a receiving groove 110 for accommodating the base 210. Specifically, the rail washer 100 accommodates the base 210 through the receiving groove 110, allowing the bolts 300, mounting components 200, and nuts 400 to be installed sequentially.

[0048] like Figure 1 As shown, in this embodiment, the end face of the receiving groove 110 facing away from the rail washer 100 is not lower than the end face of the rail washer 100 facing away from the rail washer 100. This ensures that when the installation position of the universal seat 220 relative to the base 210 is adjusted accordingly, and the toothed inner cavity 211 and the toothed boss 221 are engaged, the universal seat 220 will not be interfered with or hindered by the rail washer 100. At the same time, the universal seat 220 and the base 210 are in close contact, ensuring reliable installation after assembly.

[0049] like Figure 3 As shown, in this embodiment, the bottom of the receiving groove 110 is inclined. Specifically, in some railway sections, the rails are curved and inclined. Therefore, by inclining the bottom of the receiving groove 110, the base 210 cooperates with the receiving groove 110 to achieve the leveling of the universal joint 220 and the nut 400 in sequence, ensuring that all components are in close contact during the tightening of the nut 400, and that the installation is reliable.

[0050] like Figure 2As shown, in this embodiment, the anti-loosening device also includes a flat washer 600 disposed between the mounting component 200 and the nut 400. Specifically, when the nut 400 is tightened directly, the contact area between the nut 400 and the universal joint 220 in the mounting component 200 is small, resulting in excessive local pressure, which may lead to surface crushing or deformation. By distributing the flat washer 600 between the mounting component 200 and the nut 400, the contact area is increased, the pressure is evenly distributed, and material damage is avoided. Furthermore, when the surface of the universal joint 220 has an electroplating, painting, or anti-corrosion layer, the flat washer 600 can prevent scratching the coating when tightening the nut 400. In addition, when the bolt 300 hole is slightly misaligned or the surface of the universal joint 220 is uneven, the flat washer 600 can fill the gap, ensuring full contact between the nut 400 and the universal joint 220, avoiding loosening or stress concentration caused by local suspension. Moreover, in cases where the preload needs to be adjusted, the flat washer 600 can finely adjust the installation height.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A nut-locking device for railway turnouts, characterized in that, The device includes a rail washer (100), an installation assembly (200), a bolt (300), a nut (400), and an anti-loosening assembly (500). The rail washer (100) is used to install on the web of the rail. The installation assembly (200) is connected to the rail washer (100). The bolt (300) is used to sequentially pass through the rail, the rail washer (100), and the installation assembly (200). The nut (400) is threaded to the free end of the bolt (300). The anti-loosening assembly (500) is detachably connected to the installation assembly (200). The anti-loosening assembly (500) has an anti-loosening cavity that is shaped like the outer wall of the nut (400) and is used to fit around the nut (400) to restrict the rotation of the nut (400).

2. The anti-loosening device for railway turnout nuts according to claim 1, characterized in that, The anti-loosening assembly (500) includes an anti-loosening plate (510) and a cotter pin (520). The anti-loosening plate (510) is inserted into the mounting assembly (200) and has a contoured opening (511) that conforms to the outer wall of the nut (400). The cotter pin (520) is connected to the open end of the anti-loosening plate (510) to close the contoured opening (511) and prevent the anti-loosening plate (510) from loosening.

3. The anti-loosening device for railway turnout nuts according to claim 2, characterized in that, The anti-loosening plate (510) has two limiting holes (512) for insertion and mating with the cotter pin (520). The two limiting holes (512) are coaxially arranged on opposite sides of the open end of the anti-loosening plate (510).

4. The anti-loosening device for railway turnout nuts according to claim 2, characterized in that, The anti-loosening plate (510) includes two mounting parts (513) arranged in an L-shape and interlocking with the mounting assembly (200). The two mounting parts (513) are arranged at intervals on opposite sides of the anti-loosening plate (510).

5. The anti-loosening device for railway turnout nuts according to claim 4, characterized in that, The corner of the mounting section (513) is beveled.

6. The anti-loosening device for railway turnout nuts according to any one of claims 1-5, characterized in that, The mounting assembly (200) includes a base (210) connected to the rail washer (100) and a universal joint (220) connected to the base (210) and the anti-loosening assembly (500) respectively. The base (210) has a toothed inner cavity (211), and the universal joint (220) has a toothed boss (221) for engaging with the toothed inner cavity (211).

7. The anti-loosening device for railway turnout nuts according to claim 6, characterized in that, The universal joint (220) includes two connecting slots (222) that engage with the anti-loosening component (500), and the two connecting slots (222) are spaced apart on opposite sides of the universal joint (220).

8. The anti-loosening device for railway turnout nuts according to claim 6, characterized in that, The rail washer (100) has a receiving groove (110) for accommodating the base (210).

9. The anti-loosening device for railway turnout nuts according to claim 8, characterized in that, The bottom of the receiving tank (110) is arranged at an angle.

10. The anti-loosening device for railway turnout nuts according to any one of claims 1-5, characterized in that, The anti-loosening device also includes a flat washer (600) disposed between the mounting assembly (200) and the nut (400).

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