Leveling supporting leg of crane

Abstract

The utility model relates to the technical field of cranes, in particular to a leveling supporting leg of a crane. Comprising a base for loading the crane, a plurality of hydraulic supporting legs are distributed below the base in a matrix mode, a base is arranged at the bottom end of each hydraulic supporting leg, hydraulic rods are symmetrically arranged at the bottom ends of the bases, a brake seat is fixed to the upper end of a hydraulic cylinder on each hydraulic supporting leg, and arc-shaped band-type brakes are symmetrically and rotationally installed on each brake seat; and the two band-type brakes on the same brake seat synchronously move oppositely or oppositely. A band-type brake device is integrated outside a hydraulic column of the hydraulic supporting leg, and instantaneous locking and quick release of the position of the supporting leg are achieved through cooperative control of mechanical clamping and hydraulic driving. According to the design, the efficient leveling characteristic of a hydraulic system is reserved, the safety redundancy under the extreme working condition is remarkably improved through a rigid braking mechanism, and double guarantees are provided for stable operation of the crane.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to a leveling outrigger for a crane. Background Technology

[0002] In large-scale engineering construction, port loading and unloading, equipment installation and other scenarios, cranes are the core lifting equipment, and their operational stability is directly related to the safety and efficiency of the project. Due to the complex working conditions such as uneven ground and soft soil in the work site, the crane needs to be adjusted to a horizontal state through the leveling outrigger system to ensure the stability of the center of gravity during the lifting process and avoid accidents such as equipment overturning or load swinging caused by tilting.

[0003] Currently, crane leveling is primarily achieved through a hydraulic outrigger system. This system consists of multiple hydraulic cylinders that hydraulically drive the extension and retraction of each outrigger. Combined with tilt sensors and a control system, the outrigger height is adjusted in real time to achieve automatic leveling of the crane body. Hydraulic outriggers offer advantages such as high load-bearing capacity, high adjustment precision, and fast response speed, making them a standard configuration for medium and large-sized cranes. However, hydraulic systems suffer from reliability issues under long-term use or extreme conditions: for example, wear or seal failure in hydraulic valves can lead to internal leakage, causing the outriggers to slowly settle under heavy loads; sudden external impacts (such as strong winds or sudden load changes) can also cause instantaneous pressure changes within the hydraulic cylinders, resulting in outrigger position displacement. These phenomena can range from affecting lifting accuracy to seriously threatening the safety of the entire crane.

[0004] To address the aforementioned issues, existing technologies typically employ hydraulic locks or mechanical pins as secondary protection. Hydraulic locks block the oil circuit via a check valve, but their braking effectiveness depends on the sealing of the hydraulic system itself, and they still face the risk of failure when the oil is contaminated or valves become stuck. While mechanical pins can rigidly lock the outrigger position, they require manual operation, making efficient coordination with automated leveling systems difficult, and their practicality is insufficient in frequent leveling conditions. Therefore, how to improve the braking reliability and anti-interference capabilities of hydraulic outriggers while maintaining their dynamic leveling ability has become a pressing technical challenge.

[0005] Therefore, this utility model provides a leveling outrigger for a crane to improve the extension and braking safety of the hydraulic outrigger. Utility Model Content

[0006] The purpose of this utility model is to solve the problems existing in the prior art by proposing a leveling outrigger for a crane.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A leveling outrigger for a crane includes a base for loading the crane. Multiple hydraulic outriggers are distributed in a matrix under the base. Each hydraulic outrigger has a base at its bottom end. Hydraulic rods are symmetrically arranged at the bottom end of each base. A brake seat is fixed at the upper end of the hydraulic cylinder on each hydraulic outrigger. An arc-shaped brake is symmetrically rotatably installed on each brake seat. Two brakes on the same brake seat move synchronously relative to each other or in opposite directions.

[0009] Preferably, each of the gate seat sidewalls is provided with a suspension arm, each suspension arm is slidably mounted with a slider, and two connecting rods are symmetrically rotatably mounted on the slider, the two connecting rods being rotatably connected to two brakes on the same gate seat respectively.

[0010] Preferably, all the ends of the suspension arms are fixedly connected to a suspension plate, a drive disk is rotatably mounted on the suspension plate, and a rocker arm corresponding to the gate seat is arranged in a ring at the upper end of the drive disk near the outer edge. The end of each rocker arm is rotatably connected to the slider.

[0011] Preferably, the suspension arm is provided with a groove facing the axis of the drive disc, the slider slides along the groove, and the two brakes on the same brake seat are symmetrically arranged along the groove.

[0012] Preferably, the brake includes an arc-shaped tile and a friction plate disposed on the inner surface of the tile, wherein the arc length of the friction plate is smaller than the arc length of the tile.

[0013] Preferably, the friction pad is detachably installed on the inner surface of the tile.

[0014] Preferably, the gate seat is fastened to the upper end of the hydraulic cylinder.

[0015] Preferably, each hydraulic rod has a self-locking drive wheel at its lower end.

[0016] Compared with the prior art, this utility model provides a leveling outrigger for a crane, which has the following beneficial effects:

[0017] This invention integrates a brake device on the outside of the hydraulic column of the hydraulic outrigger. Through the coordinated control of mechanical clamping and hydraulic drive, it achieves instantaneous locking and rapid release of the outrigger position. This design retains the efficient leveling characteristics of the hydraulic system while significantly improving safety redundancy under extreme working conditions through a rigid braking mechanism, providing dual protection for the stable operation of the crane.

[0018] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0019] Figure 1This is a three-dimensional schematic diagram of the present invention.

[0020] Figure 2 This is a three-dimensional schematic diagram of the base and hydraulic outrigger assembly of this utility model.

[0021] Figure 3 This is a schematic diagram of the drive wheel assembly plane of this utility model.

[0022] Figure 4 For the present utility model Figure 2 A top view diagram after removing the base.

[0023] Figure 5 For the present utility model Figure 4 A schematic diagram of a synchronous drive structure for multiple holding brakes.

[0024] Figure 6 This is a schematic diagram of the single brake drive connection structure of this utility model.

[0025] Figure 7 This is a schematic diagram of the connection between the slider, connecting rod, and brake of this utility model.

[0026] Figure 8 For the present utility model Figure 5 A three-dimensional schematic diagram of the center brake and drive structure mounted on the hydraulic outriggers.

[0027] In the diagram: 1. Base; 2. Hydraulic outrigger; 3. Drive wheel; 4. Cover tube; 5. Brake seat; 6. Holding brake; 7. Linkage rod; 8. Slider; 9. Suspension arm; 10. Slide groove; 11. Suspension plate; 12. Drive disc; 13. Rocker arm; 14. Base; 15. Crane; 201. Hydraulic cylinder; 202. Hydraulic column; 601. Brake shoe; 602. Friction plate. Detailed Implementation

[0028] The following will refer to the appendix in the embodiments of this utility model. Figure 1-8 The technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0029] Example 1: In order to solve the problems existing in the prior art, this example provides a leveling outrigger for a crane, including a base 14 for loading the crane 15. Multiple hydraulic outriggers 2 are distributed in a matrix under the base 14. Each hydraulic outrigger 2 is provided with a base 1 at its bottom end. Hydraulic rods are symmetrically provided at the bottom end of each base 1. A brake seat 5 is fixed at the upper end of the hydraulic cylinder 201 on each hydraulic outrigger 2. An arc-shaped brake shoe 601 is symmetrically rotatably installed on each brake seat 5. The two brake shoes 601 on the same brake seat 5 move synchronously relative to each other or in opposite directions.

[0030] Specifically: Base 1 serves as the supporting foundation, and a mounting space composed of reinforcing ribs is provided on base 1, within which hydraulic outriggers 2 are installed, supporting the hydraulic outriggers 2; a hydraulic rod is connected to the lower end of base 1. Both the hydraulic outriggers 2 and the hydraulic rod are hydraulic devices (the hydraulic rod is under base 1), including a hydraulic cylinder 201 as the mounting foundation and a hydraulic column 202 (piston rod) that rises and falls within the hydraulic cylinder 201, as well as matching seals and a hydraulic system that drives the hydraulic column 202 to rise and fall. Through the extension and retraction of multiple hydraulic outriggers 2, the levelness of base 14 can be adjusted, thereby enabling the leveling operation of crane 15. Through the hydraulic rod at the lower end of each base 1, the corresponding hydraulic outrigger 2 can be adjusted. Even on uneven ground, the extension and retraction of the hydraulic rods can ensure that multiple sets of hydraulic outriggers 2 are in a parallel and vertical state. The cooperation between the hydraulic rod and the hydraulic outriggers 2 allows this solution to level complex ground.

[0031] The number of hydraulic outriggers 2 shall not be less than three to achieve axial plane adjustment. Four sets are shown in the attached figure to ensure the installation stability of the base 14.

[0032] Each of the brake seats 5 has a suspension arm 9 on its sidewall facing the axis of the base 14. A slider 8 is slidably mounted on each suspension arm 9, and two connecting rods 7 are symmetrically rotatably mounted on the slider 8. The two connecting rods 7 are rotatably connected to two brakes 6 on the same brake seat 5. The slider 8 can be driven by any of the following devices: hydraulic rod, pneumatic rod, or electric telescopic rod, and slides from the suspension arm 9. Driving the slider 8 towards the hydraulic outrigger 2 causes it to deflect against the brakes 6 via the two connecting rods 7, separating the brakes 6 from the hydraulic column 202. At this time, the hydraulic column 202 has no additional braking performance, and its extension length can be adjusted as needed to adjust the levelness of the base 14. Driving the slider 8 away from the hydraulic outrigger 2 causes it to pull the two brakes 6 via the two connecting rods 7, thereby causing the brakes 6 to latch onto the hydraulic support, providing a radial locking force to the hydraulic support and improving the extension braking performance of the hydraulic outrigger 2.

[0033] This design integrates a brake device on the outside of the hydraulic column 202 of the hydraulic outrigger 2. Through the coordinated control of mechanical clamping and hydraulic drive, it achieves instantaneous locking and rapid release of the outrigger position. This design retains the efficient leveling characteristics of the hydraulic system while significantly improving safety redundancy under extreme working conditions through a rigid braking mechanism, providing dual protection for the stable operation of the crane 15.

[0034] To achieve synchronized deployment of all brakes 6 during base 14 leveling and to reduce the loading burden caused by the structural redundancy of individually driven sliders 8, all the suspension arms 9 are fixedly connected to a suspension plate 11 at their ends. A drive disk 12 is rotatably mounted on the suspension plate 11. The drive disk 12 is driven by a motor fixed to the suspension plate 11, with the motor's output shaft passing through the suspension plate 11. The drive disk 12 is fixed to the motor's output shaft. Near the outer edge of the upper end of the drive disk 12, there is a circular array of rocker arms 13 corresponding to the brake seats 5. The end of each rocker arm 13 is rotatably connected to the slider 8.

[0035] According to the above technical solution, the motor drives the drive disc 12 to rotate forward and backward, thereby pulling and pushing all the rocker arms 13. Pushing the rocker arms 13 causes them to move against the slider 8 towards the brake 6, causing the two brake plates 6 to deflect and separate via the two connecting rods 7, thus disengaging the hydraulic cylinder 202 from external braking. Pulling the rocker arms 13 causes them to pull the slider 8 away from the brake 6, pulling the two brake plates 6 together via the two connecting rods 7, causing them to snap onto the hydraulic cylinder 202, thereby providing external braking to the hydraulic cylinder 202.

[0036] In this design, the suspension arm 9 is provided with a groove 10 facing the axis of the drive disc 12. The slider 8 slides along the groove 10, and the two brakes 6 on the same brake seat 5 are symmetrically arranged along the groove 10. This restricts the movement of the slider 8, making the two sets of connecting rods 7 and the brakes 6 symmetrical along the direction of the pulling and pushing force of the slider 8. This ensures that the two brakes 6 are under the same force, guaranteeing synchronous unfolding and closing processes. It also prevents the two brakes 6 from moving in different states, such as one being unfolded while the other is still in contact with the hydraulic column 202. This avoids axial friction between the hydraulic column 202 and the brakes 6 when the latter is extended, which would affect the friction braking performance of the brakes 6. At the same time, the presence of the groove 10 also limits the range of movement of the slider 8, preventing the two brakes 6 from being pushed and unfolded excessively, which could cause twisting and deformation of the rotating parts.

[0037] In this design, the brake includes an arc-shaped brake shoe 601 and a friction plate 602 disposed on the inner surface of the brake shoe 601. The arc length of the friction plate 602 is less than the arc length of the brake shoe 601. Spacing is provided between both ends of the friction plate 602 and both ends of the brake shoe 601 to allow for the deflection of the brake shoe 601. The friction plate 602 is detachably installed on the inner surface of the brake shoe 601 using countersunk screws, allowing for individual replacement of the friction plate 602 after wear. At least two screws are used, evenly distributed. Figure 7 Only one countersunk screw installation location is shown in the image.

[0038] In this design, the brake seat 5 is cylindrical with an opening at its upper end. The opening size is smaller than the diameter of the hydraulic cylinder 201 but larger than the diameter of the hydraulic column 202, allowing it to be fastened to the upper end of the hydraulic cylinder 201 without affecting the extension of the hydraulic column 202. With the brake seat 5 fastened to the hydraulic cylinder 201 in this form, self-positioning can be achieved through the coordinated limiting of multiple sets of brake seats 5, suspension arms 9, and suspension plates 11. Braking of the hydraulic column 202 can be achieved even without bolts, and the need for external structural covers on the hydraulic cylinder 201, such as those with connecting holes, is reduced.

[0039] In this design, each hydraulic rod is equipped with a self-locking drive wheel 3 at its lower end. This facilitates equipment relocation and improves operational flexibility. The upper end of the drive wheel 3 is a connecting seat, on which a cover tube 4 is installed to secure the hydraulic rod, so the hydraulic rod is not shown in the attached diagram.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A levelling leg of a crane, characterised in that, The base (14) comprising a loading crane (15) is provided with a plurality of hydraulic legs (2) in matrix distribution under the base (14), the bottom end of each hydraulic leg (2) is provided with a base (1), the bottom end of the base (1) is symmetrically provided with a hydraulic rod, the upper end of the hydraulic cylinder (201) on each hydraulic leg (2) is fixed with a brake seat (5), each brake seat (5) is symmetrically rotatably installed with an arc-shaped brake shoe (6), the two brake shoes (6) on the same brake seat (5) are synchronously moved towards or away from each other.

2. A levelling leg for a crane according to claim 1, characterised in that Each brake seat (5) is provided with a hanging arm (9), each hanging arm (9) is slidably installed with a sliding block (8), the sliding block (8) is rotatably installed with two connecting rods (7) in symmetry, and the two connecting rods (7) are rotatably connected with the two brake shoes (6) on the same brake seat (5).

3. A levelling leg for a crane according to claim 2, characterised in that The terminal ends of all the hanging arms (9) are fixedly connected with a suspension plate (11), the suspension plate (11) is rotatably installed with a driving disc (12), and the upper end of the driving disc (12) is close to the outer edge surface and is annularly arrayed with a rocker (13) corresponding to the brake seat (5), and the terminal end of each rocker (13) is rotatably connected with the sliding block (8).

4. A levelling leg for a crane according to claim 3, characterised in that The hanging arm (9) is provided with a sliding groove (10) towards the axis of the driving disc (12), the sliding block (8) slides along the sliding groove (10), and the two brake shoes (6) on the same brake seat (5) are symmetrically arranged along the sliding groove (10).

5. A levelling leg for a crane according to claim 1, characterised in that The brake shoe (6) comprises an arc-shaped brake shoe (601) and a friction plate (602) arranged on the inner surface of the brake shoe (601), and the arc length of the friction plate (602) is smaller than that of the brake shoe (601).

6. A levelling leg for a crane according to claim 5, characterised in that The friction plate (602) is detachably installed on the inner surface of the brake shoe (601).

7. A levelling leg for a crane according to claim 1, characterised in that The brake seat (5) is buckled on the upper end of the hydraulic cylinder (201).

8. A levelling leg for a crane according to claim 1, characterised in that The lower end of each hydraulic rod is provided with a self-locking driving wheel (3).

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