A balanced telescoping structure spanning a gap

Abstract

The application provides a balanced telescopic structure of a crossing frame, which comprises a main beam, two telescopic beams arranged inside the main beam and capable of sliding relative to the main beam and extending outward from both ends of the main beam respectively. The left side, the right side and the lower side of both ends of the main beam are provided with first rollers, the wheel surfaces of which are in contact with the outer side surfaces of the telescopic beams; the upper side surfaces of the telescopic beams are provided with second rollers, the wheel surfaces of which are in contact with the inner side surfaces of the main beam. The outer side surfaces of the telescopic beams are provided with limiting convex steps, and the main beam is provided with a limiting part facing the outer side surfaces of the telescopic beams, which is located on the sliding path of the telescopic beams and can block the limiting convex steps to limit the extension amount. The overall crossing width is adjusted through the telescopic adjustment of the two telescopic beams, the width change of the object to be crossed is adapted, the crossing frame does not need to be replaced or on-site modified, and the construction efficiency and the equipment universality are improved.

Description

Technical Field

[0001] This invention relates to the field of bridging frames, and more particularly to a balanced telescopic structure for bridging frames. Background Technology

[0002] In power transmission line construction, railway or highway crossing projects, crossing frames are often required to support protective nets or other safety facilities, ensuring the safety of the objects being crossed. Patent 202411253859.3 discloses a method for constructing power transmission line crossings, the main body of which consists of a main beam and extended arms at both ends of the main beam. The width of the extended arms after unfolding is the maximum crossing width of the crossing frame during operation. In practical applications, this fixed-width integral structure has significant shortcomings. When the width of the object being crossed changes, the fixed-width crossing frame cannot adapt; either the width is insufficient to cover the protected area, or the width is too large, resulting in material waste and transportation inconvenience. Construction workers often need to prepare crossing frames of various specifications, or use multiple crossing frames in combination, or disassemble and modify them on-site, seriously affecting construction efficiency and increasing equipment costs and transportation difficulties.

[0003] Therefore, it is necessary to make further improvements. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a balanced telescopic structure for a cross-beam, which enables stable adjustment of the width of the main beam.

[0005] This invention proposes a balanced telescopic structure for a bridging frame, comprising a main beam with two telescopic beams inside. These two telescopic beams are slidable relative to the main beam and extend outwards from both ends of the main beam. The main beam has first rollers on its left, right, and lower sides at both ends, with the wheel surfaces of the first rollers contacting the outer surfaces of the telescopic beams. The telescopic beams have second rollers, with the wheel surfaces of the second rollers contacting the inner surfaces of the main beam. The outer surfaces of the telescopic beams have limiting steps. The main beam has limiting portions protruding towards the outer surfaces of the telescopic beams, located on the sliding path of the telescopic beams. The limiting portions can block the limiting steps to limit the extension amount of the telescopic beams.

[0006] In one or more embodiments, the side of the main beam is provided with a mounting structure for fixing the first roller. The mounting structure includes a first connecting ear and a second connecting ear, which are located at both ends of the first roller. A shaft for connecting the first roller passes through the first connecting ear and the second connecting ear.

[0007] In one or more embodiments, a shaft is provided on the beam of the telescopic beam, and the shaft is connected to a second roller. There are multiple second rollers, which are arranged side by side at intervals.

[0008] In one or more embodiments, the limiting protrusion is disposed on the inner end of the telescopic beam, and the limiting step is disposed along the surface of the telescopic beam and forms a ring.

[0009] In one or more embodiments, the main beam is provided with a mounting port that penetrates the side, the limiting part extends into the interior of the main beam through the mounting port, the limiting part has a fixing seat that abuts against the outer side of the main beam, and the fixing seat is fixed to the main beam by screws.

[0010] In one or more embodiments, the main beam is provided with at least two limiting parts, which are respectively provided on two opposite sides of the main beam.

[0011] In one or more embodiments, the main beam has a first outer edge at both ends and the telescopic beam has a second outer edge at the extended end. When the telescopic beam retracts, the second outer edge can abut against and fit against the first outer edge.

[0012] In one or more embodiments, an extension beam is provided on the extended end of the telescopic beam, the extension beam is welded to the telescopic end of the telescopic beam, and an installation structure is provided on the end of the extension beam.

[0013] In one or more embodiments, the mounting structure is an annular mounting edge with multiple mounting holes distributed along it.

[0014] In one or more embodiments, both the main beam and the telescopic beam are steel structures.

[0015] The beneficial effects of this invention are as follows: By sliding two telescopic beams inside the main beam, the telescopic beams can extend outward or retract inward from both ends of the main beam, thereby flexibly adjusting the overall span width. When the width of the object being spanned changes, construction personnel only need to adjust the extension length of the telescopic beams to match the required protection range, without the need to replace different specifications of the spanning frame or to carry out on-site disassembly and modification, significantly improving construction efficiency and equipment versatility. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the telescopic beam in the cross-frame before it extends, according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the telescopic beam in the cross-bridge frame after it has extended, according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the main beam in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the telescopic beam according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the limiting step and the limiting part cooperating after the telescopic beam extends in an embodiment of the present invention. Detailed Implementation

[0017] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0018] Please refer to the appendix. Figure 1-5 This invention provides a balanced telescopic structure for a bridging frame, comprising a main beam 1, inside which are two telescopic beams 2, which can slide relative to the main beam 1 and extend outward from both ends of the main beam 1 respectively; the main beam 1 has first rollers 3 on its left, right, and lower sides at both ends, the wheel surfaces of the first rollers 3 contacting the outer surfaces of the telescopic beams 2; the sides of the telescopic beams 2 have second rollers 4, the wheel surfaces of the second rollers 4 contacting the inner surfaces of the main beam 1; the outer surfaces of the telescopic beams 2 have limiting protrusions 5; the main beam 1 has limiting portions 6 protruding towards the outer surfaces of the telescopic beams 2, the limiting portions 6 being located on the sliding path of the telescopic beams 2, and the limiting portions 6 can block the limiting protrusions 5 to limit the extension amount of the telescopic beams 2.

[0019] This design achieves flexible adjustment of the overall width of the crossing frame by incorporating two relatively sliding telescopic beams 2 extending from both ends inside the main beam 1, adapting to the width requirements of different objects being crossed. Simultaneously, the first rollers 3 on the left, right, and lower sides of the main beam 1 contact the outer surfaces of the telescopic beams 2, while the second rollers 4 on the upper surface of the telescopic beams 2 contact the inner surfaces of the main beam 1, forming multi-faceted rolling support. This reduces frictional resistance during expansion and contraction, ensuring the smoothness and directionality of the telescopic beams' sliding. Furthermore, the cooperation between the limiting protrusion 5 and the limiting part 6 precisely limits the maximum extension of the telescopic beams, preventing them from detaching and improving the safety and reliability of the structure. This structure boasts advantages such as high load-bearing capacity and smooth expansion and contraction.

[0020] The main beam 1 has a mounting structure on its side for fixing the first roller 3. The mounting structure includes a first connecting ear 7 and a second connecting ear 8. The first connecting ear 7 and the second connecting ear 8 are located at both ends of the first roller 3. A shaft 9 for connecting the first roller passes through the first connecting ear 7 and the second connecting ear 8. By setting the first connecting ear 7, the second connecting ear 8 and the shaft passing through the first roller 3, a stable and reliable mounting structure is provided for the first roller 3, which facilitates the positioning and fixing of the first roller 3. The shaft 9 is specifically a bolt, which facilitates subsequent disassembly, maintenance or replacement and reduces maintenance costs.

[0021] See Figure 4The telescopic beam 2 has a shaft post 10 threaded through its beam body. The shaft post 10 is connected to a second roller 4. There are multiple second rollers 4 arranged side by side with intervals. By threading the shaft post 10 through the telescopic beam 2 and arranging multiple second rollers 4 side by side with intervals on the shaft post 10, the rolling support capacity between the telescopic beam 2 and the inner side of the main beam 1 is enhanced. This makes the force on the telescopic beam 2 more uniform during sliding, reduces local wear, and extends its service life.

[0022] The limiting protrusion 5 is provided on the inner end of the telescopic beam 2. The limiting step 5 is set along the surface of the telescopic beam 2 and forms a ring. Setting the limiting protrusion 5 on the inner end of the telescopic beam 2 and forming a ring structure increases the force-bearing area when in contact with the limiting part 6, avoids local stress concentration, and improves the strength and durability of the limiting structure. The limiting step 5 is welded to the telescopic beam.

[0023] See Figure 3 The main beam 1 is provided with a through-side mounting opening. The limiting part 6 extends into the main beam 1 through the mounting opening. The limiting part 6 has a fixing seat 61 that abuts against the outer side of the main beam 1. The fixing seat 61 is fixed to the main beam 1 with screws. By providing a mounting opening on the side of the main beam 1, the limiting part 6 can extend into the main beam 1 and be fixed to the outer side of the main beam 1 by the fixing seat 61 and screws, which facilitates the installation and removal of the limiting part 6. Furthermore, the main beam 1 is provided with at least two limiting parts 6, which are respectively provided on two opposite sides of the main beam 1. This makes the force on the telescopic beam 2 more balanced when it is extended to the limit position, avoiding the telescopic beam 2 from tilting or jamming due to unilateral force, and further improving the stability and safety of the structure.

[0024] The main beam 1 has a first outer edge 11 at both ends, and the telescopic beam 2 has a second outer edge 12 at its extended end. When the telescopic beam 2 retracts, the second outer edge 12 can abut against and fit with the first outer edge 11. When the second outer edge 12 abuts against and fits with the first outer edge 11, a clear indication of retraction in place is formed, while preventing the telescopic beam 2 from retracting excessively into the interior of the main beam 1.

[0025] The telescopic beam 2 has an extension beam 13 at its extended end. The extension beam 13 is welded to the telescopic end of the telescopic beam 2. The end of the extension beam 13 has an installation structure. The installation structure at the end of the extension beam 13 facilitates the connection of protective nets or other functional components, such as extension arms or support rods, thereby improving the flexibility and applicability of the structure. The installation structure is a ring-shaped installation edge 14 with multiple installation holes 15 distributed on it. This facilitates quick and secure bolt connections with protective nets, support rods, or other external equipment of different specifications, thereby improving on-site assembly efficiency and connection reliability.

[0026] Both the main beam 1 and the telescopic beam 2 are made of steel. Steel has high strength and good rigidity, and can withstand large tensile, compressive and bending loads, ensuring the structural stability and safety of the gantry in complex construction environments. At the same time, steel is easy to process, weld and surface anti-corrosion treatment, which reduces manufacturing and maintenance costs.

[0027] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A balanced telescopic structure for a bridging frame, characterized in that: The main beam (1) includes two telescopic beams (2) inside the main beam (1). The two telescopic beams (2) can slide relative to the main beam (1) and can slide outward from both ends of the main beam (1). The main beam (1) has a first roller (3) on its left, right and lower sides at both ends. The wheel surface of the first roller (3) contacts the outer side of the telescopic beam (2). The side of the telescopic beam (2) has a second roller (4). The wheel surface of the second roller (4) contacts the inner side of the main beam (1). The outer side of the telescopic beam (2) has a limiting step (5). The main beam (1) has a limiting part (6) protruding towards the outer side of the telescopic beam (2). The limiting part (6) is located on the sliding path of the telescopic beam (2). The limiting part (6) can block the limiting step (5) to limit the extension of the telescopic beam (2).

2. The balanced telescopic structure of a bridging frame according to claim 1, characterized in that: The side of the main beam (1) is provided with an installation structure for fixing the first roller (3). The installation structure includes a first connecting ear (7) and a second connecting ear (8). The first connecting ear (7) and the second connecting ear (8) are located at both ends of the first roller (3). A shaft body (9) for connecting the first roller passes through the first connecting ear (7) and the second connecting ear (8).

3. The balanced telescopic structure of a bridging frame according to claim 1, characterized in that: The telescopic beam (2) is provided with a shaft column (10) through its beam body. The shaft column (10) is connected to the second roller (4). There are multiple second rollers (4), which are arranged side by side at intervals.

4. The balanced telescopic structure of a bridging frame according to claim 1, characterized in that: The limiting protrusion (5) is provided on the inner end of the telescopic beam (2), and the limiting step (5) is provided along the surface of the telescopic beam (2) and forms a ring.

5. The balanced telescopic structure of a bridging frame according to claim 1, characterized in that: The main beam (1) is provided with an installation port that penetrates the side. The limiting part (6) extends into the main beam (1) through the installation port. The limiting part (6) has a fixing seat (61) that abuts against the outer side of the main beam (1). The fixing seat (61) is fixed to the main beam (1) by screws.

6. The balanced telescopic structure of a bridging frame according to claim 5, characterized in that: The main beam (1) is provided with at least two limiting parts (6), which are respectively located on two opposite sides of the main beam (1).

7. The balanced telescopic structure of a bridging frame according to claim 1, characterized in that: The main beam (1) has a first outer edge (11) at both ends, and the telescopic beam (2) has a second outer edge (12) at the extended end. When the telescopic beam (2) retracts, the second outer edge (12) can abut and fit against the first outer edge (11).

8. A balanced telescopic structure for a bridging frame according to any one of claims 1-7, characterized in that: The telescopic beam (2) has an extension beam (13) on its extended end. The extension beam (13) is welded to the telescopic end of the telescopic beam (2), and an installation structure is provided on the end of the extension beam (13).

9. The balanced telescopic structure of a bridging frame according to claim 8, characterized in that: The mounting structure is an annular mounting edge (14), on which multiple mounting holes (15) are distributed.

10. A balanced telescopic structure for a bridging frame according to any one of claims 1-7, characterized in that: Both the main beam (1) and the telescopic beam (2) are steel structures.

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