A trolley support suitable for use in a variable cross-section tunnel

Abstract

The utility model discloses a trolley support suitable for variable cross section tunnel relates to trolley support technical field, including portal main part, telescopic spare is set up on portal main part, and it includes: the outer tube is axially horizontal and is arranged at the top of portal main part, and both ends are connected with outside, the threaded rod is coaxial and is arranged in the outer tube, and the annular gap is left between the outer wall of threaded rod and the inner wall of outer tube, the threaded cylinder is nested in the annular gap, and its inner wall is in threaded engagement with threaded rod. The utility model with the axial movement of threaded cylinder relative to outer tube in telescopic spare, can accurate regulation trolley support node's geometric size. Since the outer tube and threaded cylinder initial state both ends are flush, and the length is same, through rotating knob, can make telescopic output end's length of protruding according to actual demand change, thereby let same trolley support can match different size's tunnel section, need not for each kind of section alone custom-made trolley support, has greatly promoted the versatility of equipment.

Description

Technical Field

[0001] This utility model relates to the field of trolley support technology, specifically a trolley support suitable for tunnels with variable cross-sections. Background Technology

[0002] During tunnel construction, the formwork support trolley is an important piece of construction equipment, mainly used for supporting formwork and assisting in concrete pouring. Its structural dimensions must match the tunnel cross-sectional dimensions. However, in actual engineering projects, there are many tunnels with variable cross-sections, and the cross-sectional dimensions of different sections of the tunnel vary. Even within the same tunnel, there may be gradual or abrupt changes in the cross-sectional structure.

[0003] Currently, for the construction of tunnels with variable cross-sections, traditional trolley supports typically employ a fixed structure design, meaning that one type of trolley support can only adapt to a specific tunnel cross-section. When the tunnel cross-section dimensions change, the corresponding trolley support needs to be replaced. This not only increases equipment procurement costs and requires construction units to stock multiple specifications of trolley supports to cope with different cross-sections, but also leads to low construction efficiency. Replacing the trolley support requires a significant amount of time for disassembly, installation, and debugging, severely impacting the construction schedule. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a trolley support suitable for tunnels with variable cross-sections.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A trolley support suitable for variable cross-section tunnels, comprising:

[0007] gantry main body;

[0008] The telescopic component, installed on the main body of the gantry, includes:

[0009] The outer cylinder is axially and horizontally positioned at the top of the gantry body, with both ends connected to the outside.

[0010] A threaded rod is coaxially inserted inside the outer cylinder, and an annular gap is left between the outer wall of the threaded rod and the inner wall of the outer cylinder.

[0011] A threaded cylinder is nested within the annular gap. Its inner wall is threadedly engaged with the threaded rod, its outer wall is slidably engaged with the inner wall of the outer cylinder, and one end extends to the outside of the outer cylinder to form a telescopic output end.

[0012] A knob, which rotates at the end of the outer cylinder and is connected to a threaded rod, causes the threaded cylinder to move axially along the outer cylinder under the radial constraint of the annular gap, thereby allowing the telescopic output end to adjust its size relative to the gantry body joint.

[0013] Preferably, the length of the outer cylinder is the same as the length of the threaded cylinder, and in the initial state, the two ends are flush.

[0014] Preferably, the gap between the inner wall of the outer cylinder and the outer wall of the threaded cylinder allows the threaded cylinder to move axially along the outer cylinder.

[0015] Preferably, the number of rotations of the knob is proportional to the axial displacement of the threaded cylinder.

[0016] Preferably, the inner wall of the outer cylinder is provided with at least one guide keyway along the axial direction, and the outer wall of the threaded cylinder is provided with a corresponding guide protrusion. The guide protrusion is embedded in the guide keyway and slides to form a rigid constraint for radial displacement.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model utilizes the axial movement of the threaded cylinder relative to the outer cylinder in the telescopic component to precisely adjust the geometric dimensions at the nodes of the trolley support. Since the outer cylinder and the threaded cylinder are initially flush at both ends and have the same length, the extension length of the telescopic output end can be varied according to actual needs by rotating the knob. This allows the same trolley support to match tunnel cross-sections of different sizes, eliminating the need to customize trolley supports for each cross-section and greatly improving the versatility of the equipment.

[0019] 2. With this invention, the operator can precisely control the displacement of the telescopic output end by rotating the control knob a certain number of times, ensuring the accuracy of the node size adjustment. Simultaneously, the annular gap between the inner wall of the outer cylinder and the outer wall of the threaded cylinder forms a radial constraint, preventing radial swaying of the threaded cylinder during movement, further ensuring the dimensional stability after adjustment and meeting the stringent dimensional accuracy requirements of tunnel cross-section construction.

[0020] 3. The telescopic component of this utility model has a compact structure in its initial state, saving installation space in the tunnel and facilitating the arrangement of the trolley support. The adjustment process can be completed simply by rotating the knob, without the need for complicated tools or operating procedures, reducing the workload of operators and enabling quick adjustment of dimensions according to actual needs during construction, shortening equipment adjustment time and improving tunnel construction efficiency.

[0021] 4. This utility model reduces the number of equipment to be purchased and the frequency of replacement because a single trolley support can adapt to various tunnel cross-sectional dimensions, thereby lowering equipment purchase costs and inventory pressure. At the same time, it avoids the labor time wasted on frequent trolley support replacements, reducing construction downtime and indirectly lowering construction costs, significantly improving the economic efficiency of tunnel construction.

[0022] 5. The threaded meshing relationship between the threaded cylinder and the threaded rod, as well as the radial constraint of the outer cylinder on the threaded cylinder, enable the adjusted telescopic component to stably bear the load of the trolley support, ensuring the load-bearing capacity of the structure under different dimensional conditions, avoiding structural loosening or instability caused by dimensional adjustment, effectively reducing safety hazards during construction, and ensuring the safety of tunnel construction.

[0023] 6. The design of the outer cylinder and the threaded cylinder of this utility model are of the same length, so that the maximum extension of the threaded cylinder is its own length and the minimum length is the initial length. Operators can clearly grasp the adjustment range of the node, which is convenient for reasonable adjustment according to the tunnel cross-section size requirements, avoids structural damage caused by excessive adjustment, and improves the controllability of the construction process. Attached Figure Description

[0024] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a cross-sectional view of the present invention;

[0027] Figure 3 For the present utility model Figure 1 Another schematic diagram of the state structure;

[0028] Figure 4 For the present utility model Figure 3 Another implementation state structure diagram.

[0029] The diagram shows the following labels: 1. Main body of the gantry; 2. Telescopic component; 21. Outer cylinder; 22. Threaded rod; 23. Threaded cylinder; 3. Knob. Detailed Implementation

[0030] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0031] Example

[0032] like Figures 1-4 As shown, taking the right side as an example, a trolley support suitable for variable cross-section tunnels includes:

[0033] gantry body 1;

[0034] Telescopic component 2, installed on the gantry body 1, includes:

[0035] The outer cylinder 21 is axially and horizontally installed on the top of the gantry body 1, and its two ends are connected to the outside.

[0036] The threaded rod 22 is coaxially inserted inside the outer cylinder 21, and an annular gap is left between the outer wall of the threaded rod 22 and the inner wall of the outer cylinder 21.

[0037] The threaded cylinder 23 is nested in the annular gap. Its inner wall is threadedly engaged with the threaded rod 22, and its outer wall is slidably engaged with the inner wall of the outer cylinder 21. One end extends to the outside of the outer cylinder 21 to form a telescopic output end.

[0038] Knob 3 rotates at the end of the outer cylinder 21 and is connected to the threaded rod 22. When knob 3 is rotated, the threaded cylinder 23 moves axially along the outer cylinder 21 under the radial constraint of the annular gap, so that the telescopic output end forms a size adjustment relative to the node of the gantry body 1.

[0039] The gantry body 1 serves as the load-bearing foundation for the entire trolley support, providing a stable installation platform for the telescopic component 2. The outer cylinder 21 of the telescopic component 2 is axially and horizontally fixed to the top of the gantry body 1, and its design, with both ends connected to the outside, provides space for the telescopic movement of the threaded cylinder 23. The threaded rod 22 is coaxially inserted inside the outer cylinder 21, maintaining an annular gap with it. This avoids direct contact with the outer cylinder 21 and provides a structural basis for the nesting of the threaded cylinder 23. The threaded cylinder 23 is nested precisely within the annular gap, with its inner wall threadedly engaging with the threaded rod 22, and its outer wall slidingly engaging with the inner wall of the outer cylinder 21. This dual engagement allows for dimensional adjustment.

[0040] Knob 3 is rotatably connected to the end of the outer cylinder 21 and fixedly connected to the threaded rod 22, forming the power input component for adjustment. When the operator rotates knob 3, knob 3 drives the threaded rod 22 to rotate synchronously. Since the threaded rod 22 and the threaded cylinder 23 are in a threaded engagement relationship, the rotation of the threaded rod 22 is converted into an axial force on the threaded cylinder 23. Under the action of the axial force generated by the rotation of the threaded rod 22, the threaded cylinder 23 moves along the axial direction of the outer cylinder 21, extending outward along the axial direction of the outer cylinder 21, increasing the size of the telescopic output end. When knob 3 is rotated counterclockwise, the threaded cylinder 23 retracts inward along the axial direction of the outer cylinder 21, decreasing the size of the telescopic output end.

[0041] like Figures 2-3 As shown, the number of rotations of knob 3 is proportional to the axial displacement of threaded cylinder 23. Operators can precisely calculate and control the extension and retraction distance of threaded cylinder 23 by controlling the number of rotations of knob 3, thereby achieving precise adjustment of the node dimensions and meeting the dimensional accuracy requirements of the tunnel cross-section.

[0042] like Figures 1-3 As shown, the length of the outer cylinder 21 is the same as the length of the threaded cylinder 23, and in the initial state, both ends are flush. The maximum extension of the threaded cylinder 23 is its own length. At this time, the total length of the outer cylinder 21 and the threaded cylinder 23 is twice the initial length, and the minimum length is the initial length. This ensures that the operator can clearly grasp the adjustment boundary and avoid over-adjustment that could lead to structural failure.

[0043] like Figures 2-3 As shown, a gap exists between the inner wall of the outer cylinder 21 and the outer wall of the threaded cylinder 23 to allow the threaded cylinder 23 to move axially along the outer cylinder 21. The inner wall of the outer cylinder 21 has at least one guide keyway along the axial direction, and a corresponding guide protrusion is provided on the outer wall of the threaded cylinder 23. The guide protrusion slides within the guide keyway, forming a rigid constraint on radial displacement. During adjustment, the outer guide protrusion of the threaded cylinder 23 slides within the guide keyway, while the radial constraint of the outer cylinder 21 on the threaded cylinder 23 constantly restricts its radial wobble, ensuring smooth axial movement of the threaded cylinder 23. After adjustment, the threaded engagement between the threaded cylinder 23 and the threaded rod 22, along with the constraint effect of the outer cylinder 21, can jointly bear the load of the trolley support, ensuring the stability of the structure under different dimensional conditions and avoiding safety hazards caused by adjustment.

[0044] like Figure 4 As shown, in another embodiment, the telescopic component 2 can also be set on the vertical node of the gantry body 1 to realize the horizontal and vertical adjustment function, so as to meet the overall size expansion when the tunnel cross section changes, and to meet the actual needs.

[0045] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A trolley support suitable for variable cross-section tunnels, characterized in that, include: gantry main body; The telescopic component, installed on the main body of the gantry, includes: The outer cylinder is axially and horizontally positioned at the top of the gantry body, with both ends connected to the outside. A threaded rod is coaxially inserted inside the outer cylinder, and an annular gap is left between the outer wall of the threaded rod and the inner wall of the outer cylinder. A threaded cylinder is nested within the annular gap. Its inner wall is threadedly engaged with the threaded rod, its outer wall is slidably engaged with the inner wall of the outer cylinder, and one end extends to the outside of the outer cylinder to form a telescopic output end. A knob, which rotates at the end of the outer cylinder and is connected to a threaded rod, causes the threaded cylinder to move axially along the outer cylinder under the radial constraint of the annular gap, thereby allowing the telescopic output end to adjust its size relative to the gantry body joint.

2. The trolley support suitable for variable cross-section tunnels according to claim 1, characterized in that: The outer cylinder has the same length as the threaded cylinder, and in the initial state, both ends are flush.

3. A trolley support suitable for variable cross-section tunnels according to claim 1, characterized in that: The gap between the inner wall of the outer cylinder and the outer wall of the threaded cylinder allows the threaded cylinder to move axially along the outer cylinder.

4. A trolley support suitable for variable cross-section tunnels according to claim 1, characterized in that: The number of rotations of the knob is proportional to the axial displacement of the threaded cylinder.

5. A trolley support suitable for variable cross-section tunnels according to claim 1, characterized in that: The inner wall of the outer cylinder is provided with at least one guide keyway along the axial direction, and the outer wall of the threaded cylinder is provided with a corresponding guide protrusion. The guide protrusion is embedded in the guide keyway and slides to form a rigid constraint for radial displacement.

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