A bridge erecting machine rear outrigger traveling mechanism

Abstract

This utility model relates to the field of bridge erecting machine technology, and provides a rear outrigger traveling mechanism for a bridge erecting machine. The mechanism includes a rear outrigger body, with two wheel-rail sets symmetrically arranged on both sides of the bottom of the rear outrigger body. The wheel-rail sets can slide on guide rails to drive the rear outrigger body to move. The distance between the two wheel-rail sets is less than the width of the two retaining walls on the left and right sides of the top of the precast box girder, so that the rear outrigger body can avoid the retaining walls on the top of the precast box girder during movement. This bridge erecting machine uses wheel-rail instead of tires for its rear outrigger traveling structure, and the top-mounted drive reducer design makes it more compact laterally, avoiding interference from the retaining walls. It is suitable for erecting precast box girders with three walls, while retaining the original longitudinal movement components, without affecting the passage through the span or the original operation process. Furthermore, the wheel-rail relies on steel rail guidance, preventing slippage, skew, and derailment, reducing the risk of box girder overturning, and adapting to complex working conditions.

Description

Technical Field

[0001] The embodiments of this utility model relate to the field of bridge erecting machine technology, specifically to a bridge erecting machine rear outrigger traveling mechanism. Background Technology

[0002] A bridge erecting machine is a large-scale specialized lifting device used in bridge construction to erect beams (such as precast T-beams and box girders). Its core working principle is to use its own structural support and moving system to transfer the precast beam from the beam transport vehicle to the designated position on the bridge pier and complete a continuous operation process of precise alignment and fixation.

[0003] In bridge erection, bridge erecting machines typically employ a single-span, simply supported girder erection process: a girder transport vehicle delivers the precast box girder to the rear of the bridge erecting machine for feeding, a crane trolley lifts and pulls the girder, and then the box girder is positioned in mid-air for fine-tuning. Currently, the displacement of the bridge erecting machine is primarily achieved through the hydraulically driven tire-mounted structure of its rear outriggers for span operation. However, the above-mentioned tire-running structure has the following drawbacks: In some projects, it is required that the precast box girder be erected together with "three walls" (including slag retaining walls with a maximum height of about 1 meter on both sides, and long strip-shaped thin-walled components). The original rear outrigger tire-running system is driven by a transverse motor reducer, which occupies a large lateral space. This causes the slag retaining wall to completely interfere with the tire-running drive components, making it impossible to pass smoothly. This directly hinders the erection of the precast box girder with three walls and makes it difficult to meet the project construction requirements. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this utility model provide a rear leg traveling mechanism for a bridge erecting machine, which solves the technical problem that the traditional rear leg traveling mechanism of a bridge erecting machine cannot adapt to the erection operation of precast box girders with three walls in the related art.

[0005] According to one aspect, at least one embodiment of the present invention provides a traveling mechanism for the rear outriggers of a bridge erecting machine, comprising: Rear support leg main body; Two wheel-rail assemblies are symmetrically arranged on both sides of the bottom of the rear support leg body. The wheel-rail assemblies can slide on the guide rail to drive the rear support leg body to move. The distance between the two wheel-rail sets is less than the width of the two retaining walls on the left and right sides of the top of the precast box girder, so that the main body of the rear support leg can avoid the retaining walls on the top of the precast box girder during movement.

[0006] For example, at least one embodiment of this utility model provides a bridge erecting machine rear outrigger traveling mechanism, wherein the wheel-rail assembly includes: Wheel and rail housing, wherein the wheel and rail housing is disposed at the bottom of the rear support leg body; The wheel is rotatably disposed within the wheel rail housing and can slide on the guide rail to drive the rear support leg body to move. A drive unit is mounted on the wheel and rail housing, and the output end of the drive unit is connected to the shaft of the wheel body.

[0007] For example, at least one embodiment of this utility model provides a bridge erecting machine rear support leg traveling mechanism, wherein the wheel body's rotation shaft is arranged horizontally, and the drive motor is located on the top of the wheel rail housing to avoid the side space of the wheel rail housing; The output end of the drive motor is connected to the shaft of the wheel body via a gear set.

[0008] For example, at least one embodiment of this utility model provides a traveling mechanism for the rear support leg of a bridge erecting machine, wherein the drive motor is a vertical reducer, and the output end of the drive motor is axially parallel to the axis of rotation of the wheel body.

[0009] The gear set includes: Transmission gear one and transmission gear two are provided. Transmission gear one is fixedly sleeved on the output end of the drive motor, and transmission gear two is fixedly sleeved on the rotating shaft of the wheel body. Transmission gear one and transmission gear two mesh with each other.

[0010] For example, at least one embodiment of this utility model provides a bridge erecting machine rear support leg traveling mechanism, wherein there are several wheels, and the several wheels are arranged at intervals along the moving direction of the rear support leg body.

[0011] For example, at least one embodiment of this utility model provides a bridge erecting machine rear outrigger traveling mechanism, which further includes: An infrared sensor is installed on the wheel and rail housing and located on opposite sides of the two wheel and rail housings. The infrared sensor is used to detect the distance between the wheel and rail housing and the slag retaining wall.

[0012] For example, at least one embodiment of this utility model provides a bridge erecting machine rear outrigger traveling mechanism, which further includes: An alarm is mounted on the wheel rail housing and electrically connected to the infrared sensor.

[0013] The beneficial effects of the embodiments of this utility model are as follows: The rear outrigger traveling mechanism of this bridge erecting machine uses a wheel-rail system instead of the original tire-based traveling structure, making the overall lateral structure more compact. Furthermore, the drive reducer is fixedly mounted directly above the corresponding steel wheel set, replacing the traditional "horizontal installation" of the tire-based traveling structure. This makes the overall width of the wheel-rail traveling mechanism smaller than the original tire system. During beam erection, the beam transport vehicle delivers the precast box girder with three walls to the rear of the bridge erecting machine for feeding. During the lifting and positioning of the beam by the hoisting trolley, the wheel-rail traveling mechanism drives the rear outrigger to move smoothly without interference from the retaining wall, allowing for successful erection. Moreover, during span crossing operations, the original longitudinal movement component can also cooperate with the wheel-rail traveling mechanism to achieve longitudinal movement of the rear outrigger across spans, ensuring continuous operation of the bridge erecting machine without affecting the span crossing function of the rear outrigger. This ensures the smooth operation of the original bridge erecting machine's workflow and meets the erection requirements of precast box girders with three walls.

[0014] In addition, the wheel-rail running mechanism relies on the rail for guidance, which avoids running deviation caused by ground settlement. It also has better lateral anti-skid ability than tires (especially in rainy weather or when there is water on the bridge surface). Combined with the symmetrical layout of the wheel-rail assembly, it can effectively prevent the rear outrigger from tilting or derailing, and reduce the risk of overturning when erecting a box girder with three walls (high center of gravity). Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the rear support leg traveling mechanism of a bridge erecting machine in one embodiment of the present invention; Figure 2 for Figure 1 A magnified view of a portion of the image; Figure 3 for Figure 1 A schematic diagram of the wheel-rail assembly in the embodiment; Figure 4 for Figure 1 A schematic diagram of the internal structure of the wheel-rail housing in the embodiment; Figure 5 for Figure 1 The diagram shows the internal structure of the wheel-rail housing in one embodiment.

[0017] In the diagram: 1. Main body of the rear support leg; 2. Wheel and rail assembly; 201. Wheel and rail shell; 202. Wheel body; 203. Drive motor; 3. Precast box girder; 4. Slag retaining wall; 5. Transmission gear one; 6. Transmission gear two. Detailed Implementation

[0018] 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 present invention and not intended to limit its scope.

[0019] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] 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.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 this utility model.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Bridge erecting machines are core large-scale specialized lifting equipment in the field of bridge construction. They are mainly used to efficiently and accurately erect prefabricated beams (such as T-beams and prefabricated box girders) to designated positions on bridge piers, replacing the inefficient mode of traditional manual erection or small equipment assembly, and greatly improving the efficiency and quality of bridge construction.

[0025] In modern bridge engineering, bridge erecting machines commonly employ a "single-span simply supported girder erection process," adaptable to the construction needs of bridges in various scenarios such as high-speed rail and highways; specifically, The bridge erecting machine has a modular structure, with its core components revolving around four main functions: support, lifting, movement, and control. These include the main beam system, outrigger system, lifting system, travel system, and control system. The main girder system, as the core load-bearing structure of the bridge erecting machine, typically uses box-section steel main girders (single or double main girders). Its length is adapted to the span of the erected beam (e.g., for 32m or 40m span beams, the main girder length must cover the span plus the pier width). It supports the lifting trolley, the weight of the beam, and its own structural load, requiring high strength and high rigidity. The outrigger system, including front, middle, and rear outriggers, is the core of the bridge erecting machine's support and movement. The front outrigger acts on the pier in front of the span to be erected, allowing for vertical lifting and lateral fine-tuning, used to position the front end of the main girder. The middle outrigger supports the already erected beam or pier, bearing the load in the middle of the main girder, and works with the rear outrigger to achieve passage through the span. The rear outriggers include a traveling system (traditionally hydraulic tire type) responsible for the longitudinal movement of the bridge erecting machine across the span, partially retaining the walking longitudinal movement components to improve movement stability; the lifting system consists of a lifting trolley, winch, and lifting device. The lifting trolley can move along the main beam track and can achieve fine-tuning of longitudinal and lateral movement. The winch drives the lifting device to lift and lower via wire rope and is equipped with a braking device to ensure safety under heavy loads. The lifting device uses a special beam lifting device (such as a clamp type or beam spreader) that is precisely matched with the box girder lifting points to ensure stable lifting; finally, the control system includes an operation console, sensors, and hydraulic / electrical control modules to achieve precise control of lifting, movement, and positioning, ensuring operational safety.

[0026] Working principle of bridge erecting machine: First, initial positioning: The bridge erecting machine moves to the span to be erected via the traveling system. The front outriggers support the pier in front, while the middle and rear outriggers support the already erected beam or the pier behind, completing the horizontal alignment and fixation of the main beam, forming a stable working frame. Next, beam feeding: The beam transport vehicle transports the precast box girder 3 (including the three walls) to the rear of the bridge erecting machine. The front end of the box girder is introduced under the main beam through the rear beam feeding device, and the lifting trolley moves to the lifting point position. Then, beam lifting and longitudinal movement: The winch starts, the lifting device clamps the beam lifting point, and the beam is simultaneously lifted and detached from the beam transport vehicle. The lifting trolley moves longitudinally forward along the main beam track, moving the box girder above the span to be erected. The control system fine-tunes the levelness of the box girder to avoid tilting; then it is precisely aligned. After the box girder reaches the target position, the trolley is moved laterally and the outriggers are finely adjusted to align the box girder axis with the center line of the pier bearing pad, ensuring that the beam end spacing and elevation deviation meet the design requirements; the girder is lowered and fixed, and the box girder is slowly lowered so that the bottom of the box girder is in close contact with the bearing pad. The fit is checked with a feeler gauge, and after confirmation, temporary supports (such as sand cylinders) are installed to complete the beam placement; finally, the girder passes through the span, the trolley retracts to the rear, the front outriggers retract or move forward, and the rear outrigger traveling mechanism drives the bridge erecting machine to move longitudinally across the already erected box girder to the next span to be erected. The above process is repeated to achieve continuous beam erection.

[0027] In order for the bridge erecting machine to be able to adapt to the precast box girder 3 with three walls, and to avoid the retaining wall 4 on it, such as Figures 1-3 As shown, it illustrates a bridge erecting machine rear outrigger traveling mechanism according to an embodiment of the present invention, including a rear outrigger body 1 and two wheel-rail assemblies 2. The wheel-rail assemblies 2 serve as "moving execution components" of the rear outrigger body 1, and are symmetrically arranged on the left and right sides of the bottom of the rear outrigger body 1 (e.g., ...). Figure 3 Specifically, the wheel-rail assembly 2 is rigidly connected to the bottom structure of the rear support leg body 1 via its own wheel-rail shell 201 (e.g., by welding or bolting), so that the load of the rear support leg body 1 can be fully transferred to the wheel-rail assembly 2; wherein, the distance between the two wheel-rail assemblies 2 is less than the width of the two slag retaining walls 4 on the left and right sides of the top of the precast box girder 3 (e.g., at the bottom). Figure 3 As shown), so that the rear support leg body 1 can avoid the slag retaining wall 4 on the top of the precast box girder 3 during movement; during the girder erection operation, the girder transport vehicle transports the precast box girder 3 with the three walls to the tail of the bridge erecting machine for feeding the girder. During the process of the lifting trolley lifting the girder into place, the wheel-rail traveling mechanism drives the rear support leg to move smoothly. Since there is no slag retaining wall 4 to interfere, the erection can be completed smoothly.

[0028] Furthermore, such as Figure 4As shown, the wheel-rail assembly 2 includes a wheel-rail housing 201, a wheel body 202, and a drive motor 203. The wheel body 202 is installed inside the wheel-rail housing 201 via an axle. The wheel surface of the wheel body 202 is adapted to the guide rail and can roll along the guide rail. The drive motor 203 is fixed directly above the wheel-rail housing 201. The output end of the drive motor 203 (which can be a vertical reducer) is connected to the transmission gear 5, which compresses the lateral space occupied by the wheel-rail assembly 2 and avoids the slag retaining wall 4. The transmission gear 5 meshes with the transmission gear 6, and the transmission gear 6 is coaxially connected to the axle of the wheel body 202, forming a power transmission path of "drive motor 203 → transmission gear 5 → transmission gear 6 → wheel body 202".

[0029] Furthermore, such as Figure 5 As shown, there are several wheels 202, which are arranged at intervals along the moving direction of the rear support leg body 1. Specifically, there can be four wheels 202, forming four pairs of wheel-rail groups 2 on the left and right sides, which are symmetrically distributed on both sides. The four wheel-rail groups 2 on each side are evenly arranged along the moving direction of the rear support leg body 1. When the vertical reducer is started, the power is transmitted to the wheel axle through gear transmission, which drives the wheels 202 to rotate, so that the rear support leg can move along the track. As a further implementation method, infrared sensors and alarms are also included to actively prevent the risk of collision between the wheel-rail assembly 2 and the retaining wall 4: Although the distance between the wheel-rail assembly 2 is smaller than the width of the retaining wall 4, during the operation of the bridge erecting machine, sudden situations such as guide rail deviation, wheel body 202 wear, and box girder sway may cause the distance between the wheel-rail shell 201 and the retaining wall 4 to shrink or even interfere. The addition of infrared sensors enables real-time monitoring of the distance, while the alarm promptly reports risks, preventing damage to the retaining wall 4 (thin-walled component) or the rear outrigger structure. Specifically, the infrared sensor is installed on the opposite side of the wheel-rail housing 201, with the sensor's detection end facing the retaining wall 4 and parallel to its facade. The alarm is installed on the same side of the wheel-rail housing 201 as the infrared sensor, within the operator's visible and audible range (e.g., the top of the wheel-rail housing 201). The signal output of the infrared sensor is electrically connected to the signal input of the alarm through the controller of the control system, thereby achieving real-time monitoring: the infrared sensor continuously emits infrared signals to detect the distance between the outer edge of the wheel-rail housing 201 and the inner facade of the retaining wall 4. When the bridge erecting machine moves and the distance shrinks to a preset warning threshold (e.g., ≤10cm), the infrared sensor outputs a trigger signal. Upon receiving the trigger signal, the alarm activates an audible and visual alarm, reminding the operator to adjust the direction of the rear outrigger movement. If the distance further shrinks to the limit threshold (e.g., ≤5cm), the sensor simultaneously sends a signal to the main control system, forcing the rear outrigger traveling mechanism to decelerate or stop to avoid collisions.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A traveling mechanism for the rear outriggers of a bridge erecting machine, characterized in that, include: Rear support leg main body (1); Two wheel-rail sets (2) are symmetrically arranged on both sides of the bottom of the rear support leg body (1). The wheel-rail sets (2) can slide on the guide rail to drive the rear support leg body (1) to move. The distance between the two wheel-rail groups (2) is less than the width of the two slag retaining walls (4) on the left and right sides of the top of the precast box girder (3), so that the rear support leg body (1) can avoid the slag retaining wall (4) on the top of the precast box girder (3) during movement.

2. The bridge erecting machine rear support leg traveling mechanism according to claim 1, characterized in that, The wheel-rail assembly (2) includes: Wheel and rail housing (201), the wheel and rail housing (201) is located at the bottom of the rear support leg body (1); Wheel body (202), the wheel body (202) is rotatably disposed in the wheel rail housing (201), the wheel body (202) can slide on the guide rail to drive the rear support leg body (1) to move; A drive unit (203) is mounted on the wheel and rail housing (201), and the output end of the drive unit (203) is connected to the shaft of the wheel body (202).

3. The bridge erecting machine rear outrigger traveling mechanism according to claim 2, characterized in that, The axle of the wheel (202) is horizontally arranged, and the drive motor (203) is located on the top of the wheel rail housing (201) to avoid the side space of the wheel rail housing (201); The output end of the drive motor (203) is connected to the shaft of the wheel (202) via a gear set.

4. The bridge erecting machine rear outrigger traveling mechanism according to claim 3, characterized in that, The drive unit (203) is a vertical reducer, and the output end of the drive unit (203) is parallel to the axis of the wheel shaft (202).

5. The bridge erecting machine rear outrigger traveling mechanism according to claim 4, characterized in that, The gear set includes: Transmission gear one (5) and transmission gear two (6), the transmission gear one (5) is fixedly sleeved on the output end of the drive machine (203), and the transmission gear two (6) is fixedly sleeved on the rotating shaft of the wheel body (202). The transmission gear one (5) meshes with the transmission gear two (6).

6. A bridge erecting machine rear outrigger traveling mechanism according to any one of claims 2 to 5, characterized in that, There are several wheels (202), and the several wheels (202) are arranged at intervals along the moving direction of the rear support leg body (1).

7. A bridge erecting machine rear outrigger traveling mechanism according to any one of claims 2 to 5, characterized in that, Also includes: An infrared sensor is provided on the wheel and rail housing (201) and located on opposite sides of the two wheel and rail housings (201). The infrared sensor is used to detect the distance between the wheel and rail housing (201) and the slag retaining wall (4).

8. The bridge erecting machine rear outrigger traveling mechanism according to claim 7, characterized in that, Also includes: An alarm is mounted on the wheel rail housing (201) and electrically connected to the infrared sensor.

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