Rail expansion joint structure and rail beam assembly

Abstract

This invention provides a track expansion joint structure and a track beam assembly. The track expansion joint structure is used to connect two adjacent track beams. The track expansion joint structure includes two connecting components, each of which includes multiple finger plates. Each finger plate has an integrally formed fixing part and a finger part. The fixing part of the multiple finger plates of one connecting component is connected to the inner wall of a first track beam among two adjacent track beams, and the fixing part of the multiple finger plates of the other connecting component is connected to the inner wall of a second track beam among two adjacent track beams. The fingers of the multiple finger plates of one connecting component engage with the fingers of the multiple finger plates of the other connecting component to form a reserved gap between corresponding pairs of finger plates. The expansion joint assembly of this invention has the characteristics of good safety, good stability, and low manufacturing cost.

Description

Technical Field

[0001] This invention belongs to the field of rail transit technology, and particularly relates to a track expansion joint structure and a track beam assembly. Background Technology

[0002] Suspended monorail is a type of rail transit, and the track beam is a crucial component of the suspended monorail transit system. Due to temperature fluctuations, a certain gap is usually maintained between adjacent track beams. To ensure smooth train passage through this gap, an expansion joint is typically installed. These expansion joints generally take the form of finger-shaped plates.

[0003] The two finger-shaped plates that assemble the expansion joint in the relevant technology are different, which makes it impossible for the two finger-shaped plates to be interchanged. This can easily lead to installation errors during the installation and construction process, and in actual operation, the two finger-shaped plates are prone to jamming. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention propose a track expansion joint structure.

[0006] The track expansion joint structure of this invention is used to connect two adjacent track beams. The track expansion joint structure includes two connecting components, each of which includes multiple finger plates. Each finger plate has an integrally formed fixing portion and a finger portion.

[0007] The fixing portion of one of the plurality of finger plates of the connecting assembly is connected to the inner wall of the first track beam in two adjacent track beams.

[0008] The fixing portion of one or more of the finger plates of another connecting assembly is connected to the inner wall of the second track beam in two adjacent track beams;

[0009] The fingers of one of the connecting components engage with the fingers of the other connecting component to form a reserved gap between the corresponding two fingers.

[0010] In some embodiments, the first end face of the fixing part is flush with the second end face of the finger part, and the thickness of the fixing part in the normal direction of the first end face is greater than the thickness of the finger part in the normal direction of the second end face.

[0011] In some embodiments, the fixing part is rectangular.

[0012] In some embodiments, the two connecting components are a first connecting component and a second connecting component, wherein the finger plate of the first connecting component is a first finger plate, and the finger plate of the second connecting component is a second finger plate;

[0013] The finger portion of the first finger plate is composed of a plurality of first finger strips spaced apart in a first direction, and the first finger strips are extended in a second direction away from the first track beam by the fixing portion of the first finger plate.

[0014] The finger portion of the second finger plate is composed of a plurality of second finger strips spaced apart in the first direction, and the second finger strips are extended in the second direction away from the first track beam by the fixing portion of the second finger plate.

[0015] Each of the first finger strips of the first finger plate is arranged in a one-to-one correspondence between two adjacent second finger strips of the second finger plate.

[0016] In some embodiments, the fixing part of the first finger plate is a first fixing part, and the first fixing part is bolted to the inner wall of the first track beam;

[0017] The fixing part of the second finger plate is the second fixing part, which is bolted to the inner wall of the second track beam.

[0018] In some embodiments, both the first fixing part and the second fixing part are provided with a plurality of bolt mounting holes, and the bolt mounting holes of the first fixing part and the bolt mounting holes of the second fixing part have the same layout.

[0019] In some embodiments, the bolt mounting hole of the first fixing part is a first bolt mounting hole, the first bolt mounting hole is a countersunk hole, the first connecting assembly includes a first connecting bolt, the first connecting bolt is disposed in the first bolt mounting hole to connect and fix the first finger plate and the first track beam, and the height of the bolt head of the first connecting bolt is less than or equal to the countersunk depth of the first bolt mounting hole.

[0020] The bolt mounting hole of the second fixing part is a second bolt mounting hole, which is a countersunk hole. The second connecting assembly includes a second connecting bolt, which is disposed in the second bolt mounting hole to connect and fix the second finger plate and the second track beam. The height of the bolt head of the first connecting bolt is less than or equal to the countersunk depth of the second bolt mounting hole.

[0021] In some embodiments, the end of the first finger bar away from the first track beam is an arc structure, and the end of the second finger bar away from the second track beam is an arc structure.

[0022] This invention also provides a track beam assembly, comprising a plurality of adjacent track beams and the track expansion joint structure described above located between the two track beams. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the track expansion joint structure according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the finger-shaped plate of the track expansion joint structure according to an embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional view of the finger-shaped plate of the track expansion joint structure according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the track beam assembly according to an embodiment of the present invention; Attached image description:

[0028] 1. Connecting component; 101. First connecting component; 102. Second connecting component;

[0029] 2. Finger-shaped plate; 201. First finger-shaped plate; 202. Second finger-shaped plate;

[0030] 3. Fixing part; 301. First fixing part; 302. Second fixing part;

[0031] 4. Finger section; 401. First finger bar; 402. First finger groove; 403. Second finger bar; 404. Second finger groove;

[0032] 5. Bolt mounting holes; 501. First bolt mounting hole; 502. Second bolt mounting hole; 503. First connecting bolt; 504. Second connecting bolt;

[0033] 6. First track beam;

[0034] 7. Second track beam;

[0035] 8. Stabilizing surface; 9. Guiding surface; 10. Traveling surface. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] The following is in conjunction with the appendix Figure 1-4 The track expansion joint structure of an embodiment of the present invention is described.

[0038] The track expansion joint structure of this invention is used to connect two adjacent track beams, such as... Figure 1As shown, the track expansion joint structure of this embodiment includes two connecting components 1, each of which includes multiple finger plates 2, and the finger plates 2 have an integrally formed fixing part 3 and a finger part 4.

[0039] One of the connecting components 1 has a fixing part 3 of multiple finger plates 2 connected to the inner wall of the first track beam 6 in two adjacent track beams, and another connecting component 1 has a fixing part 3 of multiple finger plates 2 connected to the inner wall of the second track beam 7 in two adjacent track beams.

[0040] The fingers 4 of a plurality of finger plates of one connecting component 1 engage with the fingers 4 of a plurality of finger plates 2 of another connecting component 1 to form a reserved gap between corresponding two finger plates 2.

[0041] In this embodiment of the invention, the two connecting components 1 of the track expansion joint structure have a reserved gap between their finger plates 2, facilitating the expansion and contraction of the finger portions 4 of the finger plates 2. It is understood that the finger plates 2 of the two connecting components 1 have identical structures; in other words, the two connecting components 1 are products of the same specification. Similarly, it is understood that the two connecting components 1 have the same shape, size, material, and other parameters, allowing them to be interchanged during installation. This reduces the complexity of installing the finger plates 2 for workers, avoids installation errors during construction, and prevents the finger portions 4 of the finger plates 2 from jamming due to construction errors. This ensures that the expansion joint structure is always in a good and stable working state, thereby greatly improving the safety and stability of the track expansion joint structure in this embodiment of the invention.

[0042] Meanwhile, the two connecting components 1 have the same structure, which means that only one set of production equipment is needed to complete the production process, thus greatly reducing the production cost.

[0043] Therefore, the expansion joint assembly of the present invention has the characteristics of good safety, good stability and low manufacturing cost.

[0044] The following is in conjunction with the appendix Figure 1-4 The track expansion joint structure of this embodiment of the invention is further described below.

[0045] The track expansion joint structure of this invention is used to connect two adjacent track beams, such as... Figure 1 As shown, the track expansion joint structure of this embodiment includes two connecting components 1, each of which includes multiple finger plates 2. The finger plates 2 have an integrally formed fixing part 3 and a finger part 4. In other words, the finger plates 2 can be manufactured using an integral forming process, such as casting, forging, stamping, etc.

[0046] One of the connecting components 1 has a fixing part 3 of multiple finger plates 2 connected to the inner wall of the first track beam 6 in two adjacent track beams, and another connecting component 1 has a fixing part 3 of multiple finger plates 2 connected to the inner wall of the second track beam 7 in two adjacent track beams.

[0047] like Figure 4 As shown, those skilled in the art will understand that the inner wall of the track beam includes two stabilizing surfaces 8, two guiding surfaces 9, and two running surfaces 10, which are stably arranged in the track width direction. At least one finger plate 2 is arranged on the stabilizing surfaces 8, guiding surfaces 9, and running surfaces 10 to enable the track vehicle to pass stably.

[0048] The fingers 4 of a plurality of finger plates 2 of one connecting component 1 engage with the fingers 4 of a plurality of finger plates 2 of another connecting component 1 to form a reserved gap between corresponding finger plates 2. It is understood that the fingers 4 of a finger plate 2 arranged on one stabilizing surface 8 engage with the fingers 4 of a corresponding finger plate 2 arranged on another stabilizing surface 8, and a reserved gap is formed between the two finger plates 2. Similarly, the fingers 4 of a finger plate 2 arranged on one guide surface 9 engage with the fingers 4 of a corresponding finger plate 2 arranged on another guide surface 9, and a reserved gap is formed between the two finger plates 2. Similarly, the fingers 4 of a finger plate 2 arranged on one traveling surface 10 engage with the fingers 4 of a corresponding finger plate 2 arranged on another traveling surface 10, and a reserved gap is formed between the two finger plates 2.

[0049] The track expansion joint structure of this invention forms a predetermined gap between two oppositely arranged finger plates 2, which allows the finger plates 2 and the two adjacent tracks to expand and contract stably according to temperature changes while ensuring the stable passage of the track vehicle. This greatly improves the stability and safety of the track expansion joint structure of this invention.

[0050] In some embodiments, the first end face of the fixing part 3 is flush with the second end face of the finger part 4, and the thickness of the fixing part 3 in the normal direction of the first end face is greater than the thickness of the finger part 4 in the normal direction of the second end face.

[0051] The first end face of the fixing part 3 and the second end face of the finger part 4 are both end faces that cooperate with the direction of the railcar wheels. For example, the upper end face of the fixing part 3 of the finger plate 2 arranged on the running surface is the first end face, and the upper end face of the finger part 4 is the second end face. That is to say, the first end face and the second end face can be the same plane.

[0052] Furthermore, to improve the stability of the railcar when passing over the two correspondingly arranged finger plates 2, the second end face of the finger 4 can be set as an arc surface. This reduces the impact of installation errors between the second end faces of the finger portions 4 of the two correspondingly arranged finger plates 2 on the stability of the railcar when passing over, allowing the railcar to pass stably through the rail expansion joint structure. It is understood that the second end face arranged as an arc surface should at least have a portion of its arc surface flush with the first plane to ensure smooth passage of the railcar. The specific curvature and direction of the arc surface can be determined according to actual needs.

[0053] In this embodiment of the invention, the track expansion joint structure forms a stepped surface between the third end face of the fixing part 3 of the finger plate 2 and the fourth end face of the finger part 4 by making the thickness of the fixing part 3 in the normal direction of the first end face less than the thickness of the finger part 4 in the normal direction of the second end face. The third end face and the first end face are arranged opposite to each other in the thickness direction of the finger plate 2, and the fourth end face and the second end face are arranged opposite to each other in the thickness direction of the finger plate 2.

[0054] The stepped surface formed between the third and fourth end faces can be formed by casting or by cutting stepped grooves. The specific processing method can be determined according to the actual production conditions and production needs.

[0055] It is understandable that the finger 4 is provided in the second direction by the fixing part 3 of the finger plate 2 in a direction away from the track beam connected to it, so that the finger 4 of the finger plate 2 is in a suspended state, and the finger 4 of the finger plate 2 can smoothly contract and deform, and will not cause the finger plate 2 to be stuck by the track beam due to construction errors, etc.

[0056] This greatly improves the stability of the track expansion joint structure in the embodiments of the present invention.

[0057] Furthermore, the fixing part 3 is rectangular. Setting the fixing part 3 of the finger plate 2 to be rectangular facilitates the installation and transportation of the finger plate 2, and can greatly improve the convenience of the finger plate 2.

[0058] In some embodiments, the two connecting components 1 are a first connecting component 101 and a second connecting component 102, the finger plate 2 of the first connecting component 101 is a first finger plate 201, and the finger plate 2 of the second connecting component 102 is a second finger plate 202.

[0059] The finger portion 4 of the first finger plate 201 is composed of a plurality of first finger strips 401 spaced apart in the first direction. The first finger strips 401 are extended in the second direction by the fixing portion 3 of the first finger plate 201 in a direction away from the first track beam 6. That is, the first finger strips 401 and the first finger grooves 402 that can be formed between two adjacent first finger strips 401 are alternately arranged in the second direction.

[0060] The finger portion 4 of the second finger plate 202 is composed of a plurality of second finger strips 403 spaced apart in the first direction. The second finger strips 403 are extended in the second direction by the fixing portion 3 of the second finger plate 202 in a direction away from the first track beam 6. That is, the second finger strips 403 and the second finger grooves 404 that can be formed between two adjacent second finger strips 403 are alternately arranged in the second direction.

[0061] It is understandable that the first finger strip 401 is suspended in the second direction by the fixing part 3 of the first finger plate 201 extending away from the first track beam 6, and the second finger strip 403 is suspended in the second direction by the fixing part 3 of the second finger plate 202 extending away from the second track beam 7. This allows the first finger strip 401 and the second finger strip 403 to contract and deform smoothly, and prevents the finger plate 2 from being jammed by the track beam due to construction errors.

[0062] Each of the first finger strips 401 of the first finger plate 201 is arranged in a one-to-one correspondence between two adjacent second finger strips 403 of the second finger plate 202.

[0063] To enable the first finger plate 201 of the first connecting assembly 101 and the second finger plate 202 of the second connecting assembly 102 to be interchangeable during installation, as shown in the figure, the two ends of the finger portion 4 of the first finger plate 201 in the second direction are respectively the first finger strip 401 and the first finger groove 402, and the two ends of the finger portion 4 of the second finger plate 202 in the second direction are respectively the second finger groove 404 and the second finger strip 403. This allows the first finger plate 201 and the second finger plate 202 to be interchanged simply by flipping them, thus avoiding installation misalignment during installation and greatly improving the ease of installation of the track expansion joint structure of this embodiment.

[0064] In some embodiments, the fixing part of the first finger plate 201 is the first fixing part 301, and the fixing part of the second finger plate 202 is the second fixing part 302. The first fixing part 301 and the first track beam 6, and the second fixing part 302 and the second track beam 7 can be fixedly connected by bolt and nut pairs, screws, or rivets. In order to facilitate the installation of the first finger plate 201 and the second finger plate 202, the first finger plate 201 and the second finger plate 202 should adopt the same connection method. For example, when using bolt and nut pairs for connection, the first finger plate 201 and the second finger plate 202 should use bolt and nut pairs of the same specifications to avoid confusion in the use of bolt and nut pairs for fixing the first finger plate 201 and the second finger plate 202, thereby affecting the installation efficiency of the first finger plate 201 and the second finger plate 202.

[0065] Furthermore, the second fixing part 302 is connected to the inner wall of the second track beam 7 by a bolt and nut pair, and the first fixing part 301 is connected to the first track beam 6 by a bolt and nut pair;

[0066] To facilitate the installation of the bolt and nut assembly, the first fixing part 301 and the second fixing part 302 are provided with multiple bolt mounting holes 5. At the same time, the bolt mounting holes 5 of the first fixing part 301 and the bolt mounting holes 5 of the second fixing part 302 should have the same layout.

[0067] Wherein, the bolt mounting hole 5 of the first fixing part 301 is the first bolt mounting hole 501, the first bolt mounting hole 501 is a countersunk hole, the first connecting assembly 101 includes a first connecting bolt 503, the first connecting bolt 503 is disposed in the first bolt mounting hole 501 to connect and fix the first finger plate 201 and the first track beam 6, and the height of the bolt head of the first connecting bolt 503 is less than or equal to the countersunk depth of the first bolt mounting hole 501;

[0068] The bolt mounting hole 5 of the second fixing part 302 is the second bolt mounting hole 502, which is a countersunk hole. The second connecting assembly 102 includes a second connecting bolt 504, which is disposed in the second bolt mounting hole 502 to connect and fix the second finger plate 202 and the second track beam 7. The height of the bolt head of the first connecting bolt 503 is less than or equal to the countersunk depth of the second bolt mounting hole 502.

[0069] The height of the bolt head of the first connecting bolt 503 is less than or equal to the countersunk depth of the first bolt mounting hole 501, and the height of the bolt head of the first connecting bolt 503 is less than or equal to the countersunk depth of the second bolt mounting hole 502, so that the bolt heads of the first connecting bolt 503 and the second connecting bolt 504 do not protrude from the first end face of the first finger plate 201 and the second end face of the second finger plate 202, so as to ensure that the railcar can pass stably.

[0070] Furthermore, the aforementioned bolt and nut assembly can be treated with multi-element alloy co-diffusion (Dachro) technology for corrosion protection, thereby improving the corrosion resistance of the bolt and nut assembly and extending the service life of the embodiments of the present invention.

[0071] In some embodiments, the end of the first finger strip 401 away from the first track beam 6 is an arc structure, and the end of the second finger strip 403 away from the second track beam 7 is an arc structure. It can be understood that the opposite ends of the first finger strip 401 away from the first track beam 6 in the thickness direction of the first finger plate 201 are also arc structures, and the opposite ends of the second finger strip 403 away from the second track beam 7 in the thickness direction of the second finger plate 202 are also arc structures.

[0072] The first finger strip 401 and the second finger strip 403 adopt the above-mentioned configuration. On the one hand, it makes the first finger plate 201 and the second finger plate 202 easier to install. Compared with the first finger plate 201 and the second finger plate 202 adopting an angular structure, the above-mentioned arc structure makes the first finger plate 201 and the second finger plate 202 less likely to collide and interfere during the installation and construction process. On the other hand, it makes it easier for the railcar to pass through the above-mentioned track expansion joint structure.

[0073] This invention also provides a track beam assembly, comprising a plurality of adjacent track beams and the track expansion joint structure described in the above embodiments, wherein the track expansion joint structure is disposed between two track beams.

[0074] The track beam assembly of this embodiment of the invention, by setting a track expansion joint structure, prevents the finger plate 2 from getting stuck when two adjacent track beams expand and contract under the influence of temperature, thus greatly improving the stability of the track beam assembly of this embodiment of the invention.

[0075] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0079] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A track expansion joint structure for connecting two adjacent track beams, characterized in that, include: Two connecting components, each comprising multiple finger plates, each finger plate having an integrally formed fixing portion and a finger portion. The fixing portion of one of the plurality of finger plates of the connecting assembly is connected to the inner wall of the first track beam in two adjacent track beams. The fixing portion of one or more of the finger plates of another connecting assembly is connected to the inner wall of the second track beam in two adjacent track beams; The fingers of a plurality of finger plates of one of the connecting components engage with the fingers of a plurality of finger plates of another connecting component to form a reserved gap between corresponding two finger plates; The first end face of the fixing part is flush with the second end face of the finger part. The thickness of the fixing part in the normal direction of the first end face is greater than the thickness of the finger part in the normal direction of the second end face, so that the finger part of the finger plate is in a suspended state, and thus the finger part of the finger plate can smoothly contract and deform.

2. The track expansion joint structure according to claim 1, characterized in that: The fixing part is rectangular.

3. The track expansion joint structure according to claim 1, characterized in that: The two connecting components are a first connecting component and a second connecting component, wherein the finger plate of the first connecting component is a first finger plate, and the finger plate of the second connecting component is a second finger plate; The finger portion of the first finger plate is composed of a plurality of first finger strips spaced apart in a first direction, and the first finger strips are extended in a second direction away from the first track beam by the fixing portion of the first finger plate. The finger portion of the second finger plate is composed of a plurality of second finger strips spaced apart in the first direction, and the second finger strips are extended in the second direction away from the first track beam by the fixing portion of the second finger plate. Each of the first finger strips of the first finger plate is arranged in a one-to-one correspondence between two adjacent second finger strips of the second finger plate.

4. The track expansion joint structure according to claim 3, characterized in that: The fixing part of the first finger plate is the first fixing part, and the first fixing part is bolted to the inner wall of the first track beam; The fixing part of the second finger plate is the second fixing part, which is bolted to the inner wall of the second track beam.

5. The track expansion joint structure according to claim 4, characterized in that: Both the first fixing part and the second fixing part are provided with multiple bolt mounting holes, and the bolt mounting holes of the first fixing part and the bolt mounting holes of the second fixing part have the same layout.

6. The track expansion joint structure according to claim 5, characterized in that: The bolt mounting hole of the first fixing part is a first bolt mounting hole, which is a countersunk hole. The first connecting assembly includes a first connecting bolt, which is disposed in the first bolt mounting hole to connect and fix the first finger plate and the first track beam. The height of the bolt head of the first connecting bolt is less than or equal to the countersunk depth of the first bolt mounting hole.

7. The track expansion joint structure according to claim 5, characterized in that: The bolt mounting hole of the second fixing part is a second bolt mounting hole, which is a countersunk hole. The second connecting assembly includes a second connecting bolt, which is disposed in the second bolt mounting hole to connect and fix the second finger plate and the second track beam. The height of the bolt head of the second connecting bolt is less than or equal to the countersunk depth of the second bolt mounting hole.

8. The track expansion joint structure according to claim 3, characterized in that: The end of the first finger bar away from the first track beam is an arc structure, and the end of the second finger bar away from the second track beam is an arc structure.

9. A track beam assembly comprising a plurality of adjacently arranged track beams, characterized in that, It also includes a track expansion joint structure located between the two track beams, wherein the track expansion joint structure is the track expansion joint structure as described in any one of claims 1-8.

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