Steering mechanism, bridge erecting machine and method for steering a bridge erecting machine

Abstract

The application belongs to the technical field of bridge construction, and discloses a steering mechanism, a bridge erecting machine and a bridge erecting machine steering method. The steering mechanism comprises a track, a walking assembly and a stop device. The track is used for supporting a supporting leg of the bridge erecting machine. The supporting leg can move along the length direction of the track and can also deflect within a preset angle θ range relative to the length direction of the track. The walking assembly is arranged on the track and is used for driving the track to rotate relative to the bridge deck. The stop device is arranged on the track and is used for stopping the track on the bridge deck. The steering mechanism and the bridge erecting machine body form a double-layer track system. After single rotation is completed, the next rotation can be performed by rotating the lower track, without the need of re-leveling the lower track and matching the position of the supporting leg, so that the construction efficiency is greatly improved. Moreover, the stop device can make the track stationary on the bridge deck, so that the stability and safety of the rotating operation are improved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a steering mechanism, a bridge erecting machine, and a steering method for the bridge erecting machine. Background Technology

[0002] A bridge erecting machine is a large-scale mechanical equipment specifically used for the construction of various types of bridges. Its main function is to place prefabricated bridge beams onto the erected bridge piers, thereby completing the main structure construction of the bridge.

[0003] During bridge erection machine construction, curved bridge sections often require turning. Currently, the commonly used turning method relies on the design gap between the outriggers and the track. By repeatedly making small lateral movements and adjustments to the track position within the same span of the bridge, the main beam gradually achieves a small angle of rotation. The track is mostly a straight track laid on the already erected bridge surface. During the bridge erection machine's rotation, each rotation often requires moving and re-leveling the track to match the position of the outriggers. This process is cumbersome and time-consuming, significantly impacting the turning efficiency of the bridge erection machine. Furthermore, the lack of linkage control between the lateral movement of the outriggers and the rotation angle makes the bridge erection machine prone to large turning errors or even derailment during turning, posing safety hazards.

[0004] Therefore, there is an urgent need to design a steering mechanism to solve the above-mentioned problems in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a steering mechanism, a bridge erecting machine, and a steering method for the bridge erecting machine, which can reduce the construction process and improve the steering efficiency of the bridge erecting machine.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Steering mechanism, including:

[0008] The track is used to support the outriggers of the bridge erecting machine. The outriggers are movable along the length direction of the track and can also deflect relative to the length direction of the track within a preset angle θ.

[0009] A traveling assembly is disposed on the track and is used to drive the track to rotate relative to the bridge surface;

[0010] A stop device is provided on the track and is used to stop the track from moving on the bridge surface.

[0011] Preferably, the walking assembly includes walking wheels and a drive motor, the walking wheels being disposed on the track, and the drive motor being used to drive the walking wheels to rotate.

[0012] Preferably, the walking wheel includes a first wheel set and a second wheel set, which are respectively disposed at both ends of the track along the length direction, and the axes of the first wheel set and the second wheel set are parallel to the track, and the first wheel set and the second wheel set can rotate in opposite directions.

[0013] Preferably, the stopping device is a hydraulic press, the extended end of which can abut against the bridge surface to disengage the traveling wheel from the bridge surface.

[0014] A bridge erecting machine includes a bridge erecting machine body, outriggers, and the aforementioned steering mechanism. The outriggers are mounted on the bridge erecting machine body, which is used to lift bridge beams. Rollers are mounted on the outriggers and are rotatably mounted on the track.

[0015] Preferably, the track includes a first track and a second track, and the support legs include lateral support legs and pivot support legs spaced apart on the bridge erecting machine body. The lateral support legs are slidably disposed on the first track via rollers, and the pivot support legs are slidably disposed on the second track via rollers.

[0016] The lateral support leg can move along the length direction of the first track, and the pivoting support leg can deflect relative to the length direction of the second track within a preset angle θ range.

[0017] Preferably, a displacement sensor is provided on the track, which is used to detect the distance the outrigger moves relative to the track.

[0018] A method for steering a bridge erecting machine, used to steer the aforementioned bridge erecting machine, includes the following steps:

[0019] S1. Select any one leg of the bridge erecting machine as the lateral support leg, select the other leg as the pivot support leg, the track supporting the lateral support leg is the first track, the track supporting the pivot support leg is the second track, drive the lateral support leg to move along the first track, so that the bridge erecting machine body rotates through the preset angle θ with the pivot support leg as the center.

[0020] S2. The walking component drives the first track to rotate at the preset angle θ, and the rotation direction is the same as the rotation direction of the bridge erecting machine body;

[0021] S3. The walking component drives the second track to rotate in the same direction as the bridge erecting machine body, and the rotation angle is the preset angle θ.

[0022] S4. Repeat steps S1 to S3 until the bridge erecting machine body turns past the target turning angle.

[0023] Preferably, step S1, before driving the lateral support leg to move along the track, further includes:

[0024] The first track and the second track are fixed to the bridge deck using the stop device.

[0025] The beneficial effects of this invention are as follows:

[0026] The steering mechanism provided by this invention includes a track, a traveling component, and a stopping device. The track supports the outriggers of the bridge erecting machine. Since the outriggers can move along the length of the track and can deflect relative to the track within a preset angle θ, when either the front or middle outrigger (the lateral outrigger) moves along the length of the track while the other outrigger (the pivot outrigger) remains stationary, the bridge erecting machine body will rotate around the lateral outrigger as its axis within the preset angle θ. At this time, the bridge erecting machine body will turn under the guidance of the pivot outrigger. Since the traveling component is provided on the track, it can drive the track to rotate relative to the bridge surface. Therefore, after the bridge erecting machine body turns, the relative position between the outriggers and the track can be restored to the initial state before the turn, and the lateral outrigger can continue to move along the track to carry out the next round of turning operations. Since the stopping device is provided on the track, it can keep the track stationary on the bridge surface. Therefore, during the turning operation, the steering mechanism can remain fixed relative to the bridge surface, thereby ensuring the stability and safety of the turning operation.

[0027] The bridge erecting machine provided by the present invention includes a bridge erecting machine body, outriggers, and the aforementioned steering mechanism. The outriggers are rolled on the track by rollers, and the track is rotated on the bridge deck by a traveling component. Therefore, the bridge erecting machine has a double-layer track system, and both layers of tracks can move or rotate independently. After a single rotation is completed, the lower track can be rotated to start the next rotation. There is no need to re-level the lower track and match it with the outrigger position, which greatly improves construction efficiency.

[0028] Using this bridge erecting machine steering method, the lateral outrigger is rotated by a preset angle θ with the pivot outrigger as the center, and the positions of the first and second tracks are adjusted by the rotation of the track itself, so that the track can quickly match the specific position of the outrigger after the bridge erecting machine body rotates, reducing the construction process and improving the steering efficiency of the bridge erecting machine. Attached Figure Description

[0029] Figure 1 This is a partial structural schematic diagram of the bridge erecting machine provided in a specific embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0031] Figure 3This is a top view of the bridge erecting machine after a single rotation, provided in a specific embodiment of the present invention;

[0032] Figure 4 This is a top view of the bridge erecting machine after it has completed its turning, according to a specific embodiment of the present invention.

[0033] In the picture:

[0034] 1-First track;

[0035] 2-Second track;

[0036] 3-Walking wheels;

[0037] 4-Stop device;

[0038] 5-Displacement sensor;

[0039] 100-bridge erecting machine body;

[0040] 200- Lateral Shift Leg;

[0041] 300-pivoting outrigger;

[0042] 400-Bridge deck;

[0043] 500-roller. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0045] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0048] like Figures 1 to 4 As shown, the present invention provides a steering mechanism, which includes a track, a traveling assembly, and a stopping device 4. The track supports the outriggers of the bridge erecting machine. The outriggers can move along the length of the track and can also deflect relative to the length of the track within a preset angle θ. The traveling assembly is disposed on the track and is used to drive the track to rotate relative to the bridge surface 400. The stopping device 4 is disposed on the track and is used to stop the track at the bridge surface 400. In this embodiment, since the outriggers can move along the length of the track and can deflect relative to the track within a preset angle θ, when one of the front and middle outriggers (the lateral outrigger 200) moves along the length of the track while the other outrigger (the pivot outrigger 300) remains stationary, the bridge erecting machine body 100 will rotate around the lateral outrigger 200 within a preset angle θ. At this time, the bridge erecting machine body 100 will turn under the guidance of the pivot outrigger 300. Since the traveling assembly is disposed on the track, the traveling assembly... The component can drive the track to rotate relative to the bridge deck 400. Therefore, after the bridge erecting machine body 100 turns, the relative position between the outriggers of the bridge erecting machine and the track can be restored to the initial state before the turn. Then the lateral outrigger 200 can continue to move along the track to carry out the next round of turning operation. Since the track is equipped with a stop device 4, the stop device 4 can keep the track stationary on the bridge deck 400. Therefore, when the turning operation is carried out, the turning mechanism can remain fixed relative to the bridge deck 400, thereby ensuring the stability and safety of the turning operation.

[0049] Specifically, the track includes a first track 1 and a second track 2. A lateral support leg 200 is mounted on the first track 1, and a pivot support leg 300 is mounted on the second track 2. The lateral support leg 200 and the pivot support leg 300 can rotate according to the on-site construction conditions. In this embodiment, the front support leg is the lateral support leg 200, and the middle support leg is the pivot support leg 300. This steering mechanism is suitable for continuous rotation scenarios with small radii, large turning angles, and multiple spans. By repeatedly moving the lateral support leg 200 and rotating the track, the bridge erecting machine can ultimately achieve a predetermined angle of rotation. It should be understood that in this example, the bridge deck 400 is a pre-erected bridge deck 400. It is important to note that during the steering process, personnel need to monitor the coordination between the bridge erecting machine body and the steering mechanism to ensure the safety and reliability of the steering process.

[0050] like Figure 1 and Figure 2 As shown, the walking assembly includes walking wheels 3 and a drive motor. The walking wheels 3 are mounted on the track, and the drive motor drives the walking wheels 3 to rotate. In this embodiment, walking wheels 3 are provided on both the first track 1 and the second track 2. The drive motor is fixedly mounted on the track, and the walking wheels 3 rotate under the drive of the drive motor, thereby causing the track to rotate or move.

[0051] Specifically, after the lateral support leg 200 moves on the first track 1, the first track 1 also needs to rotate to restore the initial engagement state of the lateral support leg 200 on the first track 1. The rotation of the first track 1 is achieved by the traveling wheels 3. In this embodiment, the traveling wheels 3 include a first wheel group and a second wheel group. The first wheel group and the second wheel group are respectively set at both ends of the track along the length direction, and the axes of the first wheel group and the second wheel group are parallel to the track. The first wheel group and the second wheel group can rotate in opposite directions. The lateral support leg 200 is a portal frame structure. It is straddling the middle of the first track 1 through the support legs at the bottom end, and the center point of the line connecting the two support legs of the lateral support leg 200 is the center of the first track 1 along the length direction. It can be understood that the first wheel group and the second wheel group are symmetrically arranged about the center of the first track 1. The first wheel group and the second wheel group both include four tires. The opposite rotation of the first wheel group and the second wheel group can enable the first track 1 to turn in place with the center as the axis of rotation. The structure of the pivot leg 300 is the same as that of the lateral leg 200. The structures of the first track 1 and the second track 2 are the same, and the matching relationship between the pivot leg 300 and the second track 2 is also the same as the matching relationship between the lateral leg 200 and the second track 2.

[0052] In this embodiment, as Figure 2As shown, the stopping device 4 is a hydraulic press, the extended end of which can abut against the bridge surface 400 to disengage the traveling wheel 3 from the bridge surface 400. When the lateral support leg 200 moves relative to the first track 1, the extended end of the stopping device 4 extends and abuts against the bridge surface 400 vertically, at which point the traveling wheel 3 leaves the bridge surface 400, thus ensuring the stability of the lateral support leg 200 during movement. In another embodiment, the stopping device 4 can also be a braking structure that cooperates with the traveling wheel 3. The stopping device 4 includes a brake pad, which presses against the traveling wheel 3 to brake the first track 1.

[0053] This embodiment also provides a bridge erecting machine, such as Figure 1 and Figure 2 As shown, the bridge erecting machine includes a machine body 100, outriggers, and the aforementioned steering mechanism. The outriggers are mounted on the machine body 100, which is used to lift the bridge beams. Rollers 500 are mounted on the outriggers and are rotatably mounted on a track. In this embodiment, the outriggers are rotatably mounted on the track via the rollers 500. A roller motor is mounted on the outrigger, which drives the rollers 500 to rotate. The track is rotatably mounted on the bridge deck 400 via a traveling assembly. Therefore, the bridge erecting machine has a double-layer track system, and both layers of tracks can move or rotate independently. After a single rotation, rotating the lower track allows for the next rotation without needing to re-level the lower track and match it to the outrigger position, greatly improving construction efficiency.

[0054] Specifically, the bridge erecting machine body 100 includes a main beam truss, a crane, and a control system, etc. The structure of the bridge erecting machine body 100 is common knowledge in the field and will not be described in detail here.

[0055] In this embodiment, as Figure 1 , Figure 3 as well as Figure 4As shown, the track includes a first track 1 and a second track 2. The support legs include lateral support legs 200 and pivot support legs 300, which are spaced apart on the bridge erecting machine body 100. The lateral support legs 200 are slidably mounted on the first track 1 via rollers 500, and the pivot support legs 300 are slidably mounted on the second track 2 via rollers 500. The lateral support legs 200 can move along the length direction of the first track 1, and the pivot support legs 300 can deflect relative to the length direction of the second track 2 within a preset angle θ. Specifically, the rolling surfaces of the rollers 500 are provided with flanges on both sides, making the edge of the roller 500 cross-section a U-shaped structure, so that the rollers 500 can be engaged on the track for rolling. At the same time, the distance between the flanges of the rollers 500 is slightly larger than the width of the track, that is, there is a small gap between the flanges of the rollers 500 and the side of the track. This small gap allows the rollers 500 to deflect relative to the track to a certain extent, and the deflection range is the preset angle θ. It is understandable that the first track 1 and the second track 2 have the same structure, and the rollers 500 on the lateral support leg 200 and the pivot support leg 300 also have the same structure.

[0056] To monitor the rotation angle of the bridge erecting machine each time and ensure the accuracy of the final turning angle, such as... Figure 2 As shown, a displacement sensor 5 is installed on the track. The displacement sensor 5 is used to detect the movement distance of the outrigger relative to the track. In this embodiment, the displacement sensor 5 is a photoelectric displacement sensor commonly used in the art. It is installed on the first track 1 and is used to detect the displacement of the lateral outrigger 200 on the first track 1. Since the rotation angle of the bridge erecting machine body 100 is a preset angle θ each time during a single rotation operation, and the length of the bridge erecting machine body 100 is constant, the displacement of the lateral outrigger 200 detected by the displacement sensor 5 can be used to verify whether the single rotation angle meets the requirements.

[0057] This embodiment also provides a method for steering a bridge erecting machine, using the aforementioned steering mechanism to steer the bridge erecting machine, specifically including the following steps:

[0058] S1. Select any one leg of the bridge erecting machine as the transverse support leg 200, and select the other leg as the pivot support leg 300. The track supporting the transverse support leg 200 is the first track 1, and the track supporting the pivot support leg 300 is the second track 2. Drive the transverse support leg 200 to move along the first track 1, so that the bridge erecting machine body 100 rotates through a preset angle θ with the pivot support leg 300 as the center.

[0059] S2. The walking component drives the first track 1 to rotate at a preset angle θ, and the rotation direction is the same as the rotation direction of the bridge erecting machine body 100.

[0060] S3. The walking component drives the second track 2 to rotate in the same direction as the bridge erecting machine body 100, and the rotation angle is a preset angle θ.

[0061] S4. Repeat steps S1 to S3 until the bridge erecting machine body rotates 100 degrees past the target turning angle.

[0062] Specifically, the bridge erecting machine's steering method rotates the lateral support leg 200 by a preset angle θ with the pivot leg 300 as the center, and adjusts the positions of the first track 1 and the second track 2 by the rotation of the track itself. This allows the track to quickly match the specific position of the support leg after the bridge erecting machine body 100 has rotated, reducing the construction process and improving the steering efficiency of the bridge erecting machine. Furthermore, before driving the lateral support leg 200 to move along the track in step S1, the method also includes: using a stop device 4 to fix the first track 1 and the second track 2 to the bridge deck 400.

[0063] In this embodiment, as Figure 3 and Figure 4 As shown, the stopping device 4 is a hydraulic press. Before the turning operation, the extended ends of the hydraulic presses on the first track 1 and the second track 2 abut against the bridge surface 400, so that the traveling wheels 3 on the first track 1 and the second track 2 are all away from the bridge surface 400, thereby ensuring the stability of the first track 1 and the second track 2. Then, the front outrigger is the lateral outrigger 200 and the middle outrigger is the pivot outrigger 300. The operator drives the roller 500 on the lateral outrigger 200 to rotate through the roller motor on the lateral outrigger 200. Since there is a small gap between the flange of the roller 500 and the side of the track, when the lateral outrigger 200 moves on the first track 1, it will drive the bridge erecting machine body 100 to rotate around the pivot outrigger 300 as the center. When the rotation angle reaches the preset angle θ, there is no small gap between the flange of the roller 500 on the pivot outrigger 300 and the second track 2, that is, the two are in close contact. At this time, the maximum angle of a single turning action is reached. It can be understood that the preset angle θ can be smaller than the allowable rotation angle. The maximum angle can also be equal to the maximum allowable rotation angle. Then, the operator retracts the extended ends of the hydraulic presses on the first track 1 and the second track 2, and drives the traveling wheels 3 on the first track 1 to rotate via a drive motor. The rotation direction of the first track 1 is the same as the rotation direction of the bridge erecting machine body 100 previously, and the rotation axis is the vertical line where the midpoint of the length direction of the first track 1 is located, which is also the vertical line where the center point of the line connecting the two legs of the transverse support leg 200 is located. Similarly, the operator drives the traveling wheels 3 on the second track 2 to rotate via a drive motor, achieving the rotation of the second track 2. The rotation direction of the second track 2 is the same as the rotation direction of the first track 1. At this time, the relative position between the support legs and the track of the bridge erecting machine is restored to the initial state before the turn, and there is no need to match the relative position between the support legs and the track again. The above rotation operation is then repeated, ensuring that the displacement of the transverse support leg 200 during each rotation conforms to the preset displacement, until the final turn is completed.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A steering mechanism, characterized in that, include: The track is used to support the outriggers of the bridge erecting machine. The outriggers are movable along the length direction of the track and can also deflect relative to the length direction of the track within a preset angle θ. A traveling assembly disposed on the track, the traveling assembly being used to drive the track to rotate relative to the bridge surface (400); Stop device (4), the stop device (4) is disposed on the track, the stop device (4) is used to stop the track from moving on the bridge surface (400). The walking assembly includes a walking wheel (3) and a drive motor. The walking wheel (3) is disposed on the track, and the drive motor is used to drive the walking wheel (3) to rotate. The walking wheel (3) includes a first wheel set and a second wheel set. The first wheel set and the second wheel set are respectively disposed at both ends of the track along the length direction, and the axes of the first wheel set and the second wheel set are parallel to the track. The first wheel set and the second wheel set can rotate in opposite directions. The track includes a first track (1) and a second track (2) spaced apart, and the support legs are provided on both the first track (1) and the second track (2).

2. The steering mechanism according to claim 1, characterized in that, The stop device (4) is a hydraulic press, and the extended end of the hydraulic press can abut against the bridge surface (400) to make the traveling wheel (3) disengage from the bridge surface (400).

3. A bridge erecting machine, characterized in that, The bridge erecting machine includes a bridge erecting machine body (100), outriggers, and a steering mechanism as described in any one of claims 1-2. The outriggers are disposed on the bridge erecting machine body (100), which is used to lift the bridge beams. Rollers (500) are disposed on the outriggers and are rotatably disposed on the track.

4. The bridge erecting machine according to claim 3, characterized in that, The track includes a first track (1) and a second track (2). The support legs include a transverse support leg (200) and a pivot support leg (300) spaced apart on the bridge erecting machine body (100). The transverse support leg (200) is slidably disposed on the first track (1) via the roller (500), and the pivot support leg (300) is slidably disposed on the second track (2) via the roller (500). The lateral support leg (200) can move along the length direction of the first track (1), and the pivot support leg (300) can deflect within a preset angle θ relative to the length direction of the second track (2).

5. The bridge erecting machine according to claim 4, characterized in that, A displacement sensor (5) is installed on the track, and the displacement sensor (5) is used to detect the distance the outrigger moves relative to the track.

6. A method for steering a bridge erecting machine, characterized in that, For steering the bridge erecting machine according to any one of claims 3-5, the following steps are included: S1. Select any one leg of the bridge erecting machine as the lateral support leg (200), select the other leg as the pivot support leg (300), the track supporting the lateral support leg (200) is the first track (1), the track supporting the pivot support leg (300) is the second track (2), drive the lateral support leg (200) to move along the first track (1), so that the bridge erecting machine body (100) rotates through the preset angle θ with the pivot support leg (300) as the center; S2. The walking component drives the first track (1) to rotate at the preset angle θ, and the rotation direction is the same as the rotation direction of the bridge erecting machine body (100); S3. The walking component drives the second track (2) to rotate in the same direction as the bridge erecting machine body (100), and the rotation angle is the preset angle θ. S4. Repeat steps S1 to S3 until the bridge erecting machine body (100) turns past the target turning angle.

7. The bridge erecting machine steering method according to claim 6, characterized in that, Before driving the lateral support leg (200) to move along the track in step S1, the following is also included: The first track (1) and the second track (2) are fixed to the bridge deck (400) using the stop device (4).

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