Adaptive bridge machine steering control device

Abstract

This utility model provides an adaptive steering control device for a bridge erecting machine, relating to the technical field of bridge erecting machine equipment. It includes a lower turntable, which is fixedly connected to the outriggers of the bridge erecting machine. A lower rotating flange is coaxially and fixedly welded to the lower turntable. An upper turntable is coaxially and rotatably connected to the lower turntable and connected to a longitudinal guide beam. An upper rotating flange is coaxially and fixedly welded to the upper turntable, and the upper rotating flange has multiple strip-shaped holes along its circumference. Studs are fixedly connected to the lower rotating flange, and each stud is threaded with a positioning nut. A height limiter is arranged along the length direction of the strip-shaped holes and fixedly connected to the top wall of the upper rotating flange, with the height gradually decreasing from both ends towards the middle along the length direction. A positioning plate is rotatably connected to the bottom wall of the positioning nut. This utility model can achieve relatively precise control of the rotation angle, is easy to operate, and can significantly improve the adaptability and operational safety of the bridge erecting machine in complex construction scenarios.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge erecting machine equipment, and more specifically, to an adaptive bridge erecting machine steering control device. Background Technology

[0002] Bridge erecting machines are essential construction equipment used for erecting precast bridge beams, widely applied in high-speed railway and highway bridge projects. Traditional bridge erecting machines typically include outriggers, longitudinal guide beams, main beams, overhead cranes, transverse tracks, and hydraulic, electrical, and safety monitoring systems. The outriggers and longitudinal guide beams are mostly fixedly connected to ensure the overall rigidity and stability of the structure. However, in complex sections such as small-radius curves and crossing bridge sites, fixed connections suffer from large turning radii and poor maneuverability during crossings and relocation, severely impacting construction efficiency and safety.

[0003] The applicant's long-term practice has shown that setting the outriggers and longitudinal guide beams as rotatable connections helps control the rotation radius of the overall structure (including the main beam, overhead crane, and transverse track), thereby improving the bridge erecting machine's adaptability to curved lines. However, due to the large mass of the aforementioned structure, the rotation process is significantly affected by inertia, resulting in problems such as difficulty in controlling the rotation angle and lag in action. Utility Model Content

[0004] The purpose of this invention is to provide an adaptive bridge erecting machine steering control device. This device can achieve relatively precise control of the rotation angle, is easy to operate, and can significantly improve the adaptability and operational safety of the bridge erecting machine in complex construction scenarios.

[0005] This utility model is achieved through the following technical solution:

[0006] An adaptive bridge erecting machine steering control device includes:

[0007] The lower turntable is fixedly connected to the support legs of the bridge erecting machine, and a lower rotating flange is coaxially fixedly welded onto the lower turntable.

[0008] The upper turntable is coaxially rotatably connected to the lower turntable and is connected to the longitudinal guide beam. An upper rotating flange is coaxially fixedly welded to the upper turntable. The upper rotating flange has multiple strip holes along the circumference. The strip holes are arc-shaped holes, and the center of the strip holes coincides with the rotation axis of the upper turntable.

[0009] The studs are multiple and correspond one-to-one with the multiple strip holes. The studs are fixedly connected to the lower rotating flange, and each stud is threaded with a positioning nut.

[0010] A height limit is provided along the length of the strip hole and fixedly connected to the top wall of the upper rotating flange. The height of the height limit gradually decreases from both ends to the middle along the length.

[0011] A positioning plate is rotatably connected to the bottom wall of the positioning nut. A limiting groove is formed on the positioning plate, and the limiting edge slides in cooperation with the limiting groove.

[0012] Furthermore, the height limiting edge is annular and arranged circumferentially along the strip hole, and a pair of limiting grooves are provided on each of the card slot plates, and the pair of limiting grooves are simultaneously slidably disposed on the annular height limiting edge.

[0013] Furthermore, a limiting ring is provided at intervals on the outer side of the annular height limiting edge. The limiting ring is an elastic ring and is elastically abutting against the positioning plate.

[0014] Furthermore, the height limiting edges on the plurality of said strip holes are arranged at intervals.

[0015] Furthermore, an elastic element is provided on the stud, the elastic element abuts against the positioning nut, and is used to apply a force to the height limit in the direction.

[0016] Furthermore, the top of the stud is threadedly connected to an abutment nut, and the elastic element includes a spring, one end of which is fixedly connected to the positioning nut, and the other end is fixedly connected to the abutment nut.

[0017] Furthermore, the top of the abutment nut is closed, and a screw that is threaded through the abutment nut and threadedly connected to the stud is provided.

[0018] Furthermore, a positioning ring is fixedly connected to the positioning plate, and a positioning groove is provided on the bottom wall of the positioning nut. The positioning ring and the positioning groove are slidably engaged.

[0019] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0020] 1. This utility model achieves adjustable rotation angle of the upper turntable relative to the lower turntable by coaxial rotational connection of the upper and lower turntables, combined with multiple arc-shaped slots on the upper turntable and corresponding studs and positioning nuts. Specifically, the bottom of the positioning nut is equipped with a rotatable locking plate with a limiting groove, which slides against a height limiting edge fixed to the top wall of the upper rotating flange. The height limiting edge is set along the length of the slot, and its height gradually decreases from both ends to the middle. By turning the positioning nut, the locking plate moves up and down, causing it to abut against different height positions of the height limiting edge, thereby achieving precise control of the rotation angle based on the height change of the height limiting edge. This method utilizes a mechanical limiting structure to complete complex posture control, is simple to operate, and requires no complex sensing and electrical control systems. It significantly improves the adaptability and operational safety of the bridge erecting machine in complex construction environments such as curves and small-radius transfers.

[0021] 2. This utility model features limit rings spaced at intervals on the outer side of the height limit edge. These limit rings are elastic rings that elastically abut against the positioning plate. This design further enhances the positional stability of the positioning nut and the positioning plate after adjustment. The elastic limit rings apply a continuous elastic force to the positioning plate, effectively suppressing loosening or displacement under equipment operation, vibration, or external interference. This ensures stable contact between the positioning plate and the height limit edge, further guaranteeing the accuracy and reliability of rotation angle control. Attached Figure Description

[0022] Figure 1 A schematic diagram of the overall structure of an adaptive bridge erecting machine steering control device provided by this utility model;

[0023] Figure 2 This utility model Figure 1 Enlarged view of section A;

[0024] Figure 3 This utility model aims to show exploded views of the lower and upper turntables;

[0025] Figure 4 This utility model aims to show a cross-sectional view of a stud, a positioning nut, a locking plate, and an abutment nut;

[0026] Figure 5 This utility model Figure 4 Enlarged view of section B;

[0027] Reference numerals: 1-lower turntable, 11-support leg, 12-lower rotating flange, 2-upper turntable, 21-longitudinal guide beam, 22-upper rotating flange, 221-strip hole, 3-stud, 4-positioning nut, 41-slot groove, 5-height limit edge, 6-slot plate, 61-limit groove, 62-slot ring, 7-limit ring, 8-elastic element, 81-spring, 9-abutment nut, 91-screw. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] The following is for reference Figures 1-5 As shown in the illustration, and further explained with reference to a specific embodiment, this embodiment provides an adaptive bridge erecting machine steering control device. Through the coaxial rotational connection of the upper turntable 2 and the lower turntable 1, combined with multiple sets of limit adjustment structures, it achieves relatively precise control of the rotation angle between the longitudinal guide beam 21 and the bridge erecting machine's outriggers 11. This device is suitable for the limit requirements during the flexible adjustment of the bridge erecting machine's posture in small-radius curved bridge construction environments. Specifically:

[0031] The lower turntable 1 is an integral circular structure, which is rigidly connected to the bridge erecting machine support leg 11 by welding or high-strength bolts. The lower rotating flange 12 is fixedly installed on its upper surface along the central axis, serving as the basic component for supporting and connecting the upper turntable 2.

[0032] The upper turntable 2 and the lower turntable 1 are coaxially arranged and rotatably connected by a bearing seat or hollow shaft structure, so that the upper turntable 2 can rotate relative to the lower turntable 1 about a vertical axis. An upper rotating flange 22 is fixedly welded to the upper surface of the upper turntable 2. The upper rotating flange 22 has multiple arc-shaped slots 221 along its circumference. The geometric center of the slots 221 is consistent with the rotation axis of the upper turntable 2. Each slot provides corresponding limiting and connection functions during angle adjustment.

[0033] Multiple studs 3 are sequentially inserted into the slots 221 and extend upward from the lower rotating flange 12. The external threaded section of each stud 3 is threadedly connected to the positioning nut 4. The positioning nut 4 can move up and down when rotated along the axial direction of the stud 3, and its lower end is provided with a locking plate 6 that is rotatably connected to it.

[0034] To achieve mechanical limit adjustment, the top wall of the upper rotating flange 22 is provided with a height limiting edge 5 along the arrangement direction of each arc-shaped slot 221. The height limiting edge 5 is symmetrically raised, and its height gradually decreases from both ends of the slot 221 towards the middle, forming a continuously gradually changing inclined surface structure. The geometry of the height limiting edge 5 can be prepared by laser cutting, milling, or casting to ensure that its surface is smooth, its deformation is small, and it is conducive to limiting fit.

[0035] The positioning plate 6 is provided with a limiting groove 61, which slides in conjunction with the height limiting edge 5 during adjustment. When the operator turns the positioning nut 4 to move the positioning plate 6 up and down along the stud 3, the positioning plate 6 will be forced to abut against different heights of the height limiting edge 5, thereby limiting the rotation angle of the entire upper turntable 2. In actual working conditions, after rotating the positioning nut 4 to the appropriate height, the positioning plate 6 and the height limiting edge 5 will have two abutment points, which will form an angular limit on the upper rotating flange 22. With this structure, the operator only needs to manually rotate the positioning nut 4 to fine-tune the relative angle between the longitudinal guide beam 21 and the main body of the bridge erecting machine according to construction needs. The operation is simple and the positioning is accurate.

[0036] In addition, refer to Figure 5 As shown, a locking ring 62 is welded to the lower surface of the locking plate 6. The cross-section of the locking ring 62 is dovetail-shaped or T-shaped. The locking ring 62 can be inserted into the locking groove 41 set at the bottom of the positioning nut 4 to form a rotating locking state, so that when the positioning nut 4 is rotated, the locking plate 6 can be driven to move up and down.

[0037] Reference Figure 3 and Figure 4 As shown, in this embodiment, to further improve the accuracy and stability of rotation angle control, the height limiting edge 5 adopts a ring structure. The height limiting edge 5 is distributed along the circumferential direction of multiple arc-shaped slots 221 and is fixedly installed close to the top wall of the rotating flange 22. The curvature of each height limiting edge 5 is consistent with its corresponding slot 221, ensuring that it can maintain a sliding fit with the limiting groove 61 provided on the positioning plate 6 during rotation adjustment.

[0038] Specifically, each positioning plate 6 is provided with a pair of limiting grooves 61, which are arranged at a parallel interval and located on both sides of the bottom wall of the positioning plate 6. In use, the two limiting grooves 61 can be simultaneously inserted into the relative top positions of the height limiting edge 5 set in the same strip hole 221, forming a stable bidirectional limiting contact interface, thereby effectively avoiding jamming or deflection during rotation and enhancing the overall stability and accuracy of operation.

[0039] Furthermore, to prevent the positioning plate 6 from loosening or vibrating and shifting during operation, limit rings 7 are installed at intervals along the circumferential direction on the outer side of the annular height limit 5. The limit rings 7 adopt an elastic ring structure, which can make elastic contact with the positioning plate 6 without affecting rotation and sliding. This not only plays a role in preventing vibration and stabilizing, but also provides rotational guidance assistance for the positioning plate 6 to a certain extent, improving the structural coordination.

[0040] Reference Figure 2 and Figure 3 In this embodiment, four arc-shaped slots 221 are provided on the upper rotating flange 22, evenly distributed along the circumference of the flange. Two of the slots 221 are oppositely positioned and equipped with a locking plate 6 and a height-limiting edge 5, enabling dynamic adjustment of the rotation angle. The other two slots 221 have positioning nuts 4 directly abutting against the top surface of the upper rotating flange 22 without height-limiting edges 5. This direct rigid support structure further enhances the axial support and limiting effect of the upper turntable 2, effectively preventing axial displacement of the upper and lower turntables 1 due to vibration or external interference during operation, thus improving the overall structural stability of the device. Of course, in other embodiments, multiple arc-shaped slots 221 can be provided on the upper rotating flange 22, as long as the height-limiting edges 5 are spaced apart on multiple arc-shaped slots 221.

[0041] Furthermore, to achieve controllable adjustment of the overall clamping force of the locking plate 6 and the positioning nut 4, and to prevent them from loosening or shifting, an elastic element 8 is also provided on each stud 3. The elastic element 8 is located between the stud 3 and the positioning nut 4, and always applies elastic force in the direction of the height limit 5 to ensure that the locking plate 6 can stably abut against the predetermined height of the height limit 5 during use, preventing it from floating up and down. In different embodiments, the elastic element 8 can be a spring 81, a spring sheet, or other components with elastic return function, to achieve different levels of pressure adjustment as needed.

[0042] Specifically, the upper end of the stud 3 is threaded with an abutment nut 9 for fixing the position of the elastic element 8. The elastic element 8 is preferably a helical compression spring 81, one end of which is fixed to the upper surface of the positioning nut 4, and the other end abuts against the bottom surface of the abutment nut 9. By tightening the abutment nut 9, the pre-compression of the spring 81 can be changed, thereby realizing the adjustment of the pre-tightening force of the positioning nut 4 in the height-limiting direction 5.

[0043] Further as Figure 4 As shown, the top of the abutment nut 9 is a closed structure with a hollow interior. A fixing screw 91 is threaded through the center of its upper wall. This screw 91 is used to tighten the stud 3. By tightening the screw 91, the position of the abutment nut 9 on the stud 3 can be locked, preventing it from loosening or shifting during the operation of the bridge erecting machine, thereby further ensuring the stability and reliability of the positioning nut 4 in the tightened state.

[0044] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adaptive bridge erecting machine steering control device, characterized in that, include: The lower turntable (1) is fixedly connected to the support leg (11) of the bridge erecting machine, and a lower rotating flange (12) is coaxially fixedly welded on the lower turntable (1). The upper turntable (2) is coaxially rotatably connected to the lower turntable (1), and the upper turntable (2) is connected to the longitudinal guide beam (21). An upper rotating flange (22) is coaxially fixedly welded to the upper turntable (2). The upper rotating flange (22) has multiple strip holes (221) along the circumference. The strip holes (221) are arc-shaped holes, and the center of the strip holes (221) coincides with the rotation axis of the upper turntable (2). Studs (3), there are multiple studs (3) and they correspond one-to-one with multiple strip holes (221). The studs (3) are fixedly connected to the lower rotating flange (12). Each stud (3) is threaded with a positioning nut (4). The height limit edge (5) is arranged along the length direction of the strip hole (221) and fixedly connected to the top wall of the upper rotating flange (22). The height of the height limit edge (5) gradually decreases from both ends to the middle along the length direction. The positioning plate (6) is rotatably connected to the bottom wall of the positioning nut (4). A limiting groove (61) is provided on the positioning plate (6), and the limiting edge (5) slides with the limiting groove (61).

2. The adaptive bridge erecting machine steering control device according to claim 1, characterized in that, The height limiting edge (5) is annular and arranged around the circumference of the strip hole (221). Each of the card slot plates (6) has a pair of limiting grooves (61), and the pair of limiting grooves (61) are simultaneously slidably disposed on the annular height limiting edge (5).

3. The adaptive bridge erecting machine steering control device according to claim 2, characterized in that, Limiting rings (7) are provided at intervals on the outer side of the height limiting edge (5) of the ring. The limiting rings (7) are elastic rings and are elastically abutting against the positioning plate (6).

4. The adaptive bridge erecting machine steering control device according to claim 1, characterized in that, The height limiting edges (5) on the plurality of strip holes (221) are spaced apart.

5. The adaptive bridge erecting machine steering control device according to claim 2, characterized in that, An elastic element (8) is provided on the stud (3), the elastic element (8) abuts against the positioning nut (4) and is used to apply force to the height limit along the (5) direction.

6. The adaptive bridge erecting machine steering control device according to claim 5, characterized in that, The stud (3) is threaded to the top of abutment nut (9), and the elastic element (8) includes a spring (81). One end of the spring (81) is fixedly connected to the positioning nut (4), and the other end is fixedly connected to the abutment nut (9).

7. The adaptive bridge erecting machine steering control device according to claim 6, characterized in that, The top of the abutment nut (9) is closed, and a screw (91) threaded through the abutment nut (9) is threaded to connect with the stud (3).

8. The adaptive bridge erecting machine steering control device according to claim 1, characterized in that, A positioning ring (62) is fixedly connected to the positioning plate (6), and a positioning groove (41) is provided on the bottom wall of the positioning nut (4). The positioning ring (62) and the positioning groove (41) are slidably engaged.

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