A force transmission device of a prefabricated subway station stress conversion system

Abstract

The utility model discloses an assembled subway station stress conversion system force transmission device belongs to the technical field of assembled subway station, solves the problem that the existing force transmission device is inconvenient to adjust and leads to the difficult guarantee of the deformation control of foundation pit retaining structure in the specification requirement range, it includes fixed base, one side of fixed base is used for with retaining side wall connection, the other side of fixed base is provided with support frame, is provided with the rotating assembly for driving force transmission lead screw rotation on support frame, and the both ends of force transmission lead screw are respectively with fixed base and the movable base for supporting prefabricated assembly component screw connection, the utility model discloses through force transmission lead screw respectively with fixed base and movable base screw connection, makes force transmission lead screw rotation can take place radial movement, can make movable base and prefabricated assembly component resist, wherein force transmission lead screw passes through the force transmission mode of thread, compared with the existing hydraulic jack temporary support structure, and the adjustment precision is higher.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated subway station technology, specifically to a force transmission device for a prefabricated subway station force conversion system. Background Technology

[0002] In recent years, prefabricated construction technology has been rapidly promoted in subway station projects. During the construction of prefabricated subway stations, fully prefabricated and composite prefabricated stations all involve diaphragm walls and interlocking pile retaining structures. They need to rely on diaphragm walls, interlocking piles and other retaining structures to form a temporary support system. During the excavation process, the lateral earth pressure is transferred to the steel support or permanent main structure step by step through the force transmission device.

[0003] As subway stations develop towards greater depth and size and become more intensive, the space in the foundation pit is significantly compressed. The force system of the retaining structure and the main structure needs to undergo multiple dynamic transformations. However, existing force transmission devices, such as temporary support structures with hydraulic jacks, lack sufficient dynamic adjustment capabilities, making it difficult to ensure that the deformation of the foundation pit retaining structure is controlled within the range required by the specifications. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model provides a force transmission device for a prefabricated subway station force conversion system, which solves the problem that existing force transmission devices are inconvenient to adjust, making it difficult to ensure that the deformation of the foundation pit retaining structure is controlled within the range required by specifications.

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

[0006] A force transmission device for a prefabricated subway station force conversion system is provided, including a fixed base. One side of the fixed base is used to connect to the enclosure side wall, and a support frame is provided on the other side of the fixed base. A rotating component for driving the force transmission screw to rotate is provided on the support frame. The two ends of the force transmission screw are threadedly connected to the fixed base and a movable base for supporting prefabricated assembly components, respectively.

[0007] In this design, a force-transmitting screw is threadedly connected to both a fixed base and a movable base. This allows the screw to rotate radially, causing the movable base to contact the prefabricated assembly component and transferring the lateral pressure of the component to the retaining wall. Compared to existing hydraulic jack temporary support structures, the threaded force transmission method of the force-transmitting screw offers higher adjustment precision, resulting in more accurate control of the retaining structure's deformation and ensuring that the deformation meets regulatory requirements.

[0008] Furthermore, the rotating assembly includes orthogonally meshing vertical and horizontal bevel gears. The hubs of both gears are rotatably mounted on a support frame via bearings. The shaft hole of the vertical bevel gear has an internal thread that mates with the threaded lead screw of the power transmission screw. The shaft hole of the horizontal bevel gear is fixedly connected to a connecting shaft, which is then connected to a motor drive. This orthogonal bevel gear transmission structure, formed by the vertical and horizontal bevel gears, converts horizontal rotational motion into vertical rotational motion, shortening the overall length of the power transmission device and making it suitable for confined spaces like troughs.

[0009] Furthermore, the support frame includes a top plate and a bottom plate, both fixedly connected to the fixed base. An end plate is provided between the top plate and the bottom plate. A vertical bevel gear and a horizontal bevel gear are rotatably mounted on the end plate and the bottom plate, respectively. The top plate, bottom plate, and end plate form a stable support frame, ensuring precise meshing of the bevel gear assembly.

[0010] Furthermore, support cylinders are provided on both opposite end faces of the fixed base and the movable base, and nuts that mate with the threads of the force transmission screw are fixed inside both support cylinders. The support cylinders and nuts facilitate the threaded connection between the fixed base and the movable base and the force transmission screw.

[0011] Furthermore, the two support cylinders are welded to the fixed base and the movable base, respectively. This welding connection ensures the strength of the connection between the support cylinders and the base, prevents loosening during high-frequency adjustment, and ensures stable force transmission.

[0012] Furthermore, both nuts have stepped surfaces on their outer walls, and each nut is interference-fitted into one of the two support cylinders. The stepped surface on each nut contacts the end face of the corresponding support cylinder. The stepped surface and interference fit design achieve self-locking of the nuts within the support cylinders.

[0013] Furthermore, the fixed base contains multiple magnetic bases for magnetic connection of the enclosure sidewalls. This magnetic connection method enables rapid installation and positioning, improving the construction efficiency of enclosure sidewalls made of magnetic materials, such as low-carbon steel.

[0014] Furthermore, magnetic bases are welded at the four corners and the center of the fixed base. The multi-directional distribution of magnetic bases forms a uniform adsorption force field, enhancing the reliability of the connection between the device and the enclosure structure and preventing excessive local stress from causing the device to shift.

[0015] Furthermore, the input end of the connecting shaft is connected to one end of the retractable universal coupling, and the other end of the retractable universal coupling is connected to the motor drive. The retractable universal coupling can be used when the distance between the motor and the connecting shaft is relatively large, providing a transmission distance. Attached Figure Description

[0016] Figure 1A cross-sectional schematic diagram of the force transmission device in the force conversion system of a prefabricated subway station.

[0017] Figure 2 This is a structural diagram of the fixed base;

[0018] Figure 3 This is a schematic diagram of a retractable universal coupling.

[0019] Figure 4 A schematic diagram showing the installation of force transmission devices, enclosure side walls, and prefabricated components in the force conversion system of multiple prefabricated subway stations.

[0020] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0021] The components include: 1. Fixed base; 11. Magnetic base; 2. Support frame; 21. Top plate; 22. End plate; 23. Base plate; 3. Rotating assembly; 31. Vertical bevel gear; 32. Horizontal bevel gear; 33. Connecting shaft; 34. Telescopic universal coupling; 4. Force transmission screw; 5. Movable base; 6. Support cylinder; 7. Nut; 8. Enclosure side wall; 9. Prefabricated assembly components. Detailed Implementation

[0022] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0023] This embodiment provides a force transmission device for a prefabricated subway station force conversion system, which solves the problem that existing force transmission devices are inconvenient to adjust, making it difficult to ensure that the deformation of the foundation pit retaining structure is controlled within the range required by the specifications. It is shown in detail below.

[0024] refer to Figure 1 A force transmission device for a prefabricated subway station force conversion system includes a fixed base 1, a support frame 2, a rotating component 3, a force transmission screw 4, and a movable base 5. The force transmission screw 4 is threadedly connected to both the fixed base 1 and the movable base 5, allowing the screw 4 to rotate and move radially. This causes the movable base 5 to contact the prefabricated assembly component 9, transmitting the lateral pressure of the prefabricated assembly component 9 to the retaining wall 8. Compared to existing hydraulic jack temporary support structures, the threaded force transmission method of the force transmission screw 4 offers higher adjustment precision, enabling more accurate control of retaining structure deformation and ensuring that the deformation of the retaining structure meets the required specifications.

[0025] Specifically, one side of the fixed base 1 is used to connect with the enclosure side wall 8, and the other side of the fixed base 1 is fixedly connected to the support frame 2.

[0026] In this implementation, refer to Figure 1 and Figure 2 Considering that some of the existing enclosure sidewalls 8 are made of low-carbon steel, in order to facilitate quick connection between the fixing base 1 and the enclosure sidewalls 8, multiple magnetic suction seats 11 for magnetic connection of the enclosure sidewalls 8 are fixed inside the fixing base 1. Preferably, magnetic suction seats 11 are welded at the four corners and the middle of the fixing base 1. The multi-directional distribution of magnetic suction seats 11 forms a uniform adsorption force field, enhancing the connection reliability between the device and the enclosure sidewalls 8 and preventing excessive local stress from causing the device to shift.

[0027] Specifically, the support frame 2 is a U-shaped seat structure, including a top plate 21 and a bottom plate 23 that are both fixedly connected to the fixed base 1, and an end plate 22 is provided between the top plate 21 and the bottom plate 23.

[0028] Specifically, the rotating assembly 3 drives the force transmission screw 4 to rotate. It includes an orthogonally meshing vertical bevel gear 31 and a horizontal bevel gear 32. The hubs of the vertical bevel gear 31 and the horizontal bevel gear 32 are rotatably mounted on the end plate 22 and the bottom plate 23 of the support frame 2, respectively, via bearings. The shaft hole of the vertical bevel gear 31 is provided with an internal thread that engages with the threaded force transmission screw 4. The shaft hole of the horizontal bevel gear 32 is fixedly connected to the connecting shaft, which is connected to the motor drive. The orthogonal bevel gear transmission structure formed by the vertical bevel gear 31 and the horizontal bevel gear 32 converts horizontal rotational motion into vertical rotational motion, shortening the length of the entire force transmission device and making it suitable for large tank spaces with limited space.

[0029] In this embodiment, reference Figure 1 and Figure 4 Considering the long distance between the motor and the connecting shaft, in order to provide a variable transmission distance, the input end of the connecting shaft is connected to one end of the retractable universal coupling 34, and the other end of the retractable universal coupling 34 is connected to the motor drive.

[0030] Specifically, the movable base 5 is used to support the prefabricated assembly component 9, and the two ends of the force transmission screw 4 are threadedly connected to the fixed base 1 and the movable base 5, respectively.

[0031] As the specific threaded connection structure between the force transmission screw 4 and the fixed base 1 and the movable base 5, support cylinders 6 are welded to the two opposite end faces of the fixed base 1 and the movable base 5. Nuts 7 that are threadedly engaged with the force transmission screw 4 are fixed inside the two support cylinders 6. The setting of support cylinders 6 and nuts 7 facilitates the threaded connection between the fixed base 1 and the movable base 5 and the force transmission screw 4.

[0032] In this embodiment, both nuts 7 have stepped surfaces on their outer walls. The two nuts 7 are respectively interference-fitted into the two support cylinders 6, and the stepped surface on each nut 7 is in contact with the end face of the corresponding support cylinder 6. The stepped surface and interference fit design achieve self-locking of the nuts 7 within the support cylinder 6.

[0033] As for the specific installation method of the force transmission device in the force conversion system of prefabricated subway stations, refer to 4 and... Figure 5 In this embodiment, force transmission devices are provided at the top, middle and bottom of the two upper half sides of the prefabricated assembly component 9.

[0034] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A force transmission device for a prefabricated subway station force conversion system, characterized in that, It includes a fixed base (1), one side of which is used to connect to the enclosure side wall (8), and a support frame (2) is provided on the other side of the fixed base (1). A rotating component (3) is provided on the support frame (2) for driving the force transmission screw (4) to rotate. The two ends of the force transmission screw (4) are threadedly connected to the fixed base (1) and the movable base (5) for supporting the prefabricated assembly component (9), respectively.

2. The force transmission device of the prefabricated subway station force conversion system according to claim 1, characterized in that, The rotating assembly (3) includes a vertical bevel gear (31) and a horizontal bevel gear (32) that mesh orthogonally. The hubs of the vertical bevel gear (31) and the horizontal bevel gear (32) are rotatably mounted on the support frame (2) via bearings. The shaft hole of the vertical bevel gear (31) is provided with an internal thread that engages with the threaded lead screw (4). The shaft hole of the horizontal bevel gear (32) is fixedly connected to the connecting shaft, and the connecting shaft is connected to the motor drive.

3. The force transmission device of the prefabricated subway station force conversion system according to claim 2, characterized in that, The support frame (2) includes a top plate (21) and a bottom plate (23) that are fixedly connected to the fixed base (1). An end plate (22) is provided between the top plate (21) and the bottom plate (23). The vertical bevel gear (31) and the horizontal bevel gear (32) are respectively rotatably mounted on the end plate (22) and the bottom plate (23).

4. The force transmission device of the prefabricated subway station force conversion system according to claim 1, characterized in that, Support cylinders (6) are provided on the two opposite end faces of the fixed base (1) and the movable base (5), and nuts (7) that are threadedly engaged with the force transmission screw (4) are fixed in both support cylinders (6).

5. The force transmission device of the prefabricated subway station force conversion system according to claim 4, characterized in that, The two support cylinders (6) are respectively welded to the fixed base (1) and the movable base (5).

6. The force transmission device of the prefabricated subway station force conversion system according to claim 4, characterized in that, Both nuts (7) have stepped surfaces on their outer walls. The two nuts (7) are respectively interference-fitted into the two support cylinders (6), and the stepped surfaces on each nut (7) are in contact with the end face of the corresponding support cylinder (6).

7. The force transmission device of the prefabricated subway station force conversion system according to claim 1, characterized in that, The fixed base (1) has multiple magnetic seats (11) for magnetic connection of the enclosure side wall (8).

8. The force transmission device of the prefabricated subway station force conversion system according to claim 7, characterized in that, The magnetic base (11) is welded at each of the four corners and the middle of the fixed base (1).

9. The force transmission device of the prefabricated subway station force conversion system according to claim 2, characterized in that, The input end of the connecting shaft is connected to one end of the retractable universal coupling (34), and the other end of the retractable universal coupling (34) is connected to the motor drive.

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