A leveling device and leveling method of a tower crane

Abstract

The application discloses a tower crane leveling device and a leveling method, wherein the tower crane leveling device comprises one or more supporting legs, each supporting leg comprises a supporting leg upper part and a supporting leg lower part, the supporting leg lower part is provided with a rotary support on one side, the supporting leg lower part is internally provided with one or more driving mechanisms on the other side, each driving mechanism is drivingly connected with the inner ring of the rotary support, the inner ring is connected with a leveling nut, and the leveling nut is in threaded connection with the supporting leg upper part. The application can adjust the length of each supporting leg through each leveling device, and reduce the risk of instability and overturning of the tower crane.

Description

Technical Field

[0001] The invention relates to a leveling device and a leveling method for a tower crane, and belongs to the technical field of tower crane leveling. Background Art

[0002] At present, major strategic, basic and leading engineering projects have been started one after another, such as cross-river and cross-sea bridge projects, transportation projects, large-scale clean energy projects and other major projects. The construction sites of large-scale projects are large, and the super-large engineering machinery used in the operations, such as tower cranes, are required to be used in different positions. The existing traveling tower cranes are rail-type traveling tower cranes, which cannot meet the steering requirements.

[0003] To address these challenges, crawler tower cranes emerged. These cranes have a large underframe structure, with four crawler chassis connected below. The distance between these four crawler chassis can be over 10 meters. Consequently, crawler tower cranes require a large operating area and high ground flatness.

[0004] In actual operation, when a crawler-type tower crane is traveling on a sloped ground, the entire tower crane will be tilted, posing a risk of instability. Even a cement-concrete-poured ground cannot form an ideal level ground, and generally has a slope of 0-1°. Assuming that the tower crane's boom is 100m long, when the tower crane is operating on a ground with an inclination of only 0.5°, the height difference between the front and rear ends of the tower crane's boom is 0.87m, increasing the risk of the tower crane tipping over. Figure 1 and Figure 2 .

[0005] Therefore, the present application provides a leveling device and a leveling method for a tower crane. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a leveling device and a leveling method for a tower crane, which can adjust the length of each leg through each leveling device to reduce the risk of the tower crane becoming unstable and overturning.

[0007] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0008] In one aspect, the present invention provides a leveling device for a tower crane, wherein the tower crane comprises one or more legs, each leg comprising an upper leg portion and a lower leg portion;

[0009] A slewing support is provided on one side of the lower portion of the support leg;

[0010] One or more driving mechanisms are provided in the other side of the lower part of the support leg, each driving mechanism drives the inner ring connected to the slewing support, the inner ring is connected to the leveling nut, and the leveling nut is threadedly connected to the upper part of the support leg.

[0011] Further, the driving mechanism is provided with a rotating gear, and the rotating gear is in gear engagement with the inner ring of the slewing bearing.

[0012] Further, the slewing bearing comprises an outer ring, and the outer ring is mounted on the lower part of the support leg.

[0013] Further, the leveling nut is circular.

[0014] Further, the driving mechanisms of the leveling device of the tower crane are equidistantly mounted on the inner wall of the lower part of the support leg.

[0015] Further, the upper part of the support leg is internally provided with a hydraulic oil cylinder, the piston rod of the hydraulic oil cylinder is provided with a ball head support rod, the ball head support rod penetrates the lower part of the support leg, the ball head of the ball head support rod is arranged in a ball head seat, and the ball head seat is mounted on the tracked chassis.

[0016] Further, the cylinder body of the hydraulic oil cylinder is mounted on the top of the upper part of the support leg.

[0017] On the other hand, the present application provides a leveling method of a tower crane, comprising:

[0018] obtaining the height difference between the front end and the tail end of the large arm;

[0019] in response to the height difference not being equal to 0, adjusting the length of each support leg by using the leveling device arranged in each support leg according to the obtained height difference, so that the height difference between the front end and the tail end of the large arm is 0.

[0020] Further, in response to the height difference being negative, the driving mechanism in the support leg close to the front end of the large arm drives the inner ring to rotate the leveling nut, the leveling nut drives the upper part of the support leg to move upward, and the support leg of the front end of the large arm is lengthened.

[0021] Further, in response to the height difference being negative, the driving mechanism in the support leg close to the tail end of the large arm drives the inner ring to rotate the leveling nut, the leveling nut drives the upper part of the support leg to move downward, and the current support leg length is shortened.

[0022] Further, in response to the height difference being positive, the driving mechanism in the support leg close to the front end of the large arm drives the inner ring to rotate the leveling nut, the leveling nut drives the upper part of the support leg to move downward, and the current support leg length is shortened.

[0023] Further, in response to the height difference being positive, the driving mechanism in the support leg close to the tail end of the large arm drives the inner ring to rotate the leveling nut, the leveling nut drives the upper part of the support leg to move upward, and the current support leg length is lengthened.

[0024] Further, the leveling method of the tower crane further comprises:

[0025] Further, when the length of each leg is adjusted by the leveling device arranged in each leg, the hydraulic oil cylinder arranged in the leg shares or bears the load of the upper part of the tower crane.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The leveling device arranged in each leg can adjust the length of each leg when the tower crane is unbalanced, so that the tower crane is out of the unbalanced state, and the risk of instability and overturning of the tower crane is effectively reduced.

[0028] The height difference between the front end and the end of the boom can be monitored to determine the unbalanced or balanced state of the tower crane, and when the tower crane is unbalanced, the length of each leg can be adjusted by the leveling device arranged in each leg to restore the balanced state of the tower crane. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 An embodiment structure schematic diagram of the tower crane on an ideal horizontal ground is shown;

[0030] Figure 2 An embodiment structure schematic diagram of the tower crane on an inclined 0.5° ground is shown;

[0031] Figure 3 An embodiment structure schematic diagram of the leveling device of the present application is shown;

[0032] Figure 4 An enlarged view of part A is shown; Figure 3

[0033] In the figure: 1, boom, 2, tower body, 3, chassis structure, 4, leg, 5, track chassis, 6, upper part of the leg, 7, hydraulic oil cylinder, 8, piston rod, 9, leveling nut, 10, rotary support, 11, driving mechanism, 12, lower part of the leg, 13, ball head support rod, 14, ball head seat, 15, outer ring, 16, inner ring, 17, connecting bolt I, 18, connecting bolt II, 19, rotating gear. DETAILED DESCRIPTION

[0034] The present application will be further described below in conjunction with the drawings. The following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0035] ​In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] Example 1

[0038] This embodiment introduces a leveling device for a tower crane.

[0039] The tower crane of this embodiment includes one or more legs 4 , and each leg 4 includes an upper leg portion 6 and a lower leg portion 12 .

[0040] When in use, the upper portion 6 of the support leg and the lower portion 12 of the support leg are arranged opposite to each other and both have a hollow structure.

[0041] In this embodiment, a slewing support 10 is provided on one side of the lower portion 12 of the support leg.

[0042] When in use, the port of the lower portion 12 of the support leg is arranged in a stepped shape, and the concave stepped surface is used to accommodate the slewing bearing 10.

[0043] In this embodiment, one or more driving mechanisms 11 are provided on the other side of the lower portion 12 of the support leg. Each driving mechanism 11 drives the inner ring 16 connected to the slewing bearing 10. The inner ring 16 is connected to the leveling nut 9, and the leveling nut 9 is threadedly connected to the upper portion 6 of the support leg.

[0044] When in use, the inner ring 16 of the slewing bearing 10 is connected to the leveling nut 9 through the connecting bolt I17, and the outer side of the leveling nut 9 is threadedly connected to the inner side of the upper part 6 of the support leg.

[0045] In actual application, each driving mechanism 11 is started, so that each driving mechanism 11 drives the inner ring 16 of the slewing bearing 10 to rotate clockwise or counterclockwise, and the inner ring 16 drives the leveling nut 9 to rotate. The rotation of the leveling nut 9 causes the upper part 6 of the leg threadedly connected thereto to move up or down to change the length of the leg 4.

[0046] The present invention provides a leveling device in each leg, so that when the tower crane is unbalanced, the length of each leg can be adjusted by the leveling device, so that the tower crane can be out of the unbalanced state, effectively reducing the risk of the tower crane becoming unstable and overturning.

[0047] Example 2

[0048] Based on Example 1, this example introduces in detail a leveling device for a tower crane.

[0049] The slewing bearing 10 of this embodiment includes an inner ring 16 and an outer ring 15 , and the outer ring 15 is mounted on the lower portion 12 of the support leg.

[0050] When in use, the end of the lower portion 12 of the support leg is arranged in a stepped shape, and the concave stepped surface is connected to the outer ring 15 through the connecting bolt II 18 to fix the slewing bearing 10.

[0051] The leveling nut 9 of this embodiment is in the shape of a circular ring, so that it can more flexibly drive the upper portion 6 of the support leg threadedly connected thereto to move upward or downward.

[0052] In this embodiment, each drive mechanism 11 is equidistantly installed on the inner wall of the lower part 12 of the support leg. Each drive mechanism 11 is provided with a rotating gear 19. The rotating gear 19 is engaged with the inner ring 16 of the slewing bearing 10 through a gear, so that the force on the inner ring 16 is more uniform, which can reduce the wear on the leveling nut 9, the upper part 6 of the support leg and the connecting bolt II 18.

[0053] In use, the driving mechanism 11 includes a servo motor, and a rotating gear 19 is provided on the transmission shaft of the servo motor.

[0054] A hydraulic cylinder 7 is provided in the upper portion 6 of the support leg of the leveling device of this embodiment.

[0055] When in use, the cylinder body of the hydraulic cylinder 7 is installed on the top inner side of the upper part 6 of the support leg.

[0056] In this embodiment, a ball support rod 13 is provided on the piston rod 8 of the hydraulic cylinder 7 .

[0057] During use, the ball support rod 13 is installed on the piston rod 8 along the longitudinal axis direction of the support leg.

[0058] The ball support rod 13 of this embodiment passes through the lower portion 12 of the support leg, and the ball head of the ball support rod 13 is disposed in the ball seat 14 .

[0059] The ball head seat 14 of this embodiment is installed on the crawler chassis 5.

[0060] During operation, the support legs are used to bear the load on the upper part of the tower crane. The load on the upper part of the tower crane borne by the support legs of the present invention can be borne by any one of the two groups of components, or by both groups of components.

[0061] One set of components includes: an upper part of a support leg 6, a leveling nut 9, a slewing bearing 10, a driving mechanism 11, and a lower part of a support leg 12.

[0062] When in use, the load on the upper part of the tower crane can be transferred to the crawler chassis 5 through the upper part 6 of the support leg, via the leveling nut 9, the slewing bearing 10, the drive mechanism 11, and the lower part 12 of the support leg.

[0063] In actual application, the load on the upper part of the tower crane can be transferred to the crawler chassis 5 through the upper part of the support leg 6, the leveling nut 9, the slewing bearing 10, the drive mechanism 11, the lower part of the support leg 12, the ball head support rod 13, and the ball head seat 14.

[0064] Another set of components includes: the upper part of the support leg 6, the hydraulic cylinder 7, the ball head support rod 13, and the ball head seat 14.

[0065] When in use, the load on the upper part of the tower crane can be transferred to the crawler chassis 5 through the upper part of the support leg 6 via the cylinder body of the hydraulic cylinder 7, the piston rod 8, the ball head support rod 13, and the ball head seat 14.

[0066] Example 3

[0067] Based on Example 1 or 2, this example introduces in detail a leveling device for a tower crane.

[0068] The tower crane of this embodiment includes a boom 1, a tower body 2, a base structure 3, legs 4 and a crawler chassis 5. Figure 1 .

[0069] When applied, the legs are provided as one or more cylindrical structures.

[0070] The leveling device of this embodiment is integrated in the support leg 4. The top outer side of the support leg upper part 6 is connected to the chassis structure 3, and the top inner side of the support leg upper part 6 is installed with a hydraulic cylinder 7. Figure 3 .

[0071] An internal thread is provided on the inner side of the bottom end of the upper leg portion 6, and a thread matching the internal thread is provided on the outer side of the annular leveling nut 9, and the leveling nut 9 is connected to the upper leg portion through a thread.

[0072] refer to Figure 4 The leveling nut 9 is fixed to the inner ring 16 of the slewing bearing 10 through the connecting bolt I17, and the outer ring 15 of the slewing bearing 10 is connected to the lower part 12 of the leg through the connecting bolt II 18.

[0073] The driving mechanism 11 of this embodiment is fixed on the inner wall of the lower portion 12 of the support leg and is arranged symmetrically.

[0074] refer to Figure 4 The driving mechanism 11 is provided with a rotating gear 19, which is engaged with the inner side of the inner ring 16 through a gear.

[0075] The bottom of the piston rod 8 of the hydraulic cylinder 7 of this embodiment is connected to the ball head support rod 13.

[0076] During use, there is only a compression relationship between the ball head support rod and the piston rod 8, and no tension relationship exists.

[0077] The ball head of the ball head support rod 13 of this embodiment is arranged in the ball head seat 14, and the crawler chassis 5 is connected to the lower side of the ball head seat 14.

[0078] When walking on a sloping ground, the tower crane base frame 3 is in an uneven state, causing the tower crane to be tilted. At this time, the leveling device can be operated to adjust the height of the legs so that the tower crane base frame 3 remains horizontal, and the tower crane will not be tilted.

[0079] Example 4

[0080] Based on any one of Examples 1-3, this embodiment provides a tower crane leveling method.

[0081] The leveling method of this embodiment includes:

[0082] S1 obtains the height difference between the front end and the end of the boom;

[0083] In response to the height difference not being equal to 0, S2 adjusts the length of each leg using a leveling device provided in each leg according to the acquired height difference so that the height difference between the front end and the end of the boom is 0.

[0084] The present invention can judge the imbalance or balance state of the tower crane by monitoring the height difference between the front end and the end of the boom, and can adjust the length of each leg through the leveling device provided in each leg when the tower crane is unbalanced, so that the tower crane can be restored to a balanced state.

[0085] Example 5

[0086] Based on Example 4, this example introduces in detail a method for leveling a tower crane.

[0087] The leveling method of this embodiment includes:

[0088] S1 obtains the height difference between the front end and the end of the boom;

[0089] S2, in response to the height difference not being equal to 0, adjusts the length of each outrigger according to the value of the height difference, so that the height difference between the front end of the boom and the end of the boom is 0.

[0090] The value of the height difference = the horizontal height of the front end of the boom - the horizontal height of the end of the boom.

[0091] Specifically, step S2 includes the following steps:

[0092] In response to the height difference being negative, the driving mechanism 11 in the outrigger close to the front end of the boom drives the inner ring 16 to rotate the leveling nut 9, so that the leveling nut 9 drives the upper part 6 of the outrigger to move upward, and the outrigger close to the front end of the boom becomes longer.

[0093] In response to the height difference being negative, the driving mechanism 11 in the outrigger close to the end of the boom drives the inner ring 16 to rotate the leveling nut 9, so that the leveling nut 9 drives the upper part 6 of the outrigger to move downward, and the outrigger close to the end of the boom becomes shorter.

[0094] In response to the height difference being positive, the driving mechanism 11 in the outrigger close to the front end of the boom drives the inner ring 16 to rotate the leveling nut 9, so that the leveling nut 9 drives the upper part 6 of the outrigger to move downward, and the outrigger close to the front end of the boom becomes shorter.

[0095] In response to the height difference being positive, the driving mechanism 11 in the outrigger close to the end of the boom drives the inner ring 16 to rotate the leveling nut 9, so that the leveling nut 9 drives the upper part 6 of the outrigger to move upward, and the outrigger close to the end of the boom becomes longer.

[0096] In actual application, when adjusting the length of each outrigger by using the leveling device arranged in each outrigger, the hydraulic oil cylinder needs to be started to share part or all of the load of the upper part of the tower crane by using the hydraulic oil cylinder arranged in the outrigger.

[0097] Embodiment 6

[0098] On the basis of Embodiment 4 or Embodiment 5, this embodiment details a leveling method of a tower crane.

[0099] When walking on the ground with a slope, the height of the outrigger needs to be adjusted to realize the leveling function. If at this time only the upper part 6 of the outrigger, the leveling nut 9, the rotary support 10, the driving mechanism 11 and the lower part 12 of the outrigger, or only the upper part 6 of the outrigger, the leveling nut 9, the rotary support 10, the driving mechanism 11, the lower part 12 of the outrigger, the ball head support rod 13 and the ball head seat 14 bear all the load of the upper part of the tower crane, a very large torque is needed to rotate the leveling nut 9, and the conventional driving mechanism 11 cannot meet the demand. If at this time the internal oil pressure of the hydraulic oil cylinder 7 is adjusted so that the hydraulic oil cylinder 7 bears most or all of the load of the upper part of the tower crane, the stress on the leveling nut 9 is greatly reduced, and at this time the conventional driving mechanism 11 can drive the leveling nut 9 to rotate.

[0100] Those skilled in the art will appreciate that embodiments of the application can be readily used as software, hardware, or a combination of software and hardware. In a software embodiment, the methods can be tangibly embodied in a machine-readable storage medium having stored thereon instructions that can be used to program a processing system to perform the methods. The term "processor" should be interpreted broadly to encompass a complete processing system, including a central processing unit, a microprocessor, a microcomputer, a minicomputer, etc. The term "software" should be interpreted broadly to mean instructions, instruction sets, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As illustrated in the

[0101] The present application is described in relation to flow diagrams and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It is understood that each block of the flow diagrams and / or block diagrams, and combinations of blocks in the flow diagrams and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processing system or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flow diagrams and / or block diagrams block or blocks. Figure 1 The flow diagram and / or block diagram in which the flow diagram and / or block diagram and its associated data Figure 1 Means for performing the function of one or more of the steps in the flow diagram and / or block diagram.

[0102] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the flow diagram and / or block diagram block or blocks. Figure 1 The flow diagram and / or block diagram in which the flow diagram and / or block diagram and its associated data Figure 1 Means for performing the function of one or more of the steps in the flow diagram and / or block diagram.

[0103] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the flow diagram and / or block diagram block or blocks. Figure 1 The flow diagram and / or block diagram in which the flow diagram and / or block diagram and its associated data Figure 1 Means for performing the function of one or more of the steps in the flow diagram and / or block diagram.

[0104] The embodiments of the present application described above are intended to be illustrative only and in no way limit the scope of the present application. Various modifications can be made by those skilled in the art, which fall within the scope of the present application. Therefore, the present application should not be limited by the above described embodiments.

Claims

1. A leveling device for a tower crane, characterized in that: The tower crane comprises one or more legs (4), each leg (4) comprising an upper leg portion (6) and a lower leg portion (12); A slewing bearing (10) is provided on one side of the lower portion (12) of the support leg, wherein the slewing bearing (10) includes an outer ring (15), and the outer ring (15) is mounted on the lower portion (12) of the support leg; One or more driving mechanisms (11) are provided on the other side of the lower portion (12) of the support leg, and each driving mechanism (11) drives the inner ring (16) of the slewing bearing (10), and the inner ring (16) of the slewing bearing (10) is connected to the leveling nut (9) via a connecting bolt I (17), and the outer side of the leveling nut (9) is threadedly connected to the inner side of the upper portion (6) of the support leg; Each driving mechanism (11) is equidistantly mounted on the inner wall of the lower portion (12) of the support leg. The driving mechanism (11) is further provided with a rotating gear (19). The rotating gear (19) is meshed with the inner ring (16) of the slewing bearing (10) through a gear. A hydraulic cylinder (7) is provided in the upper portion (6) of the support leg, a ball support rod (13) is provided on the piston rod (8) of the hydraulic cylinder (7), the ball support rod (13) passes through the lower portion (12) of the support leg, the ball head of the ball support rod (13) is provided in a ball head seat (14), and the ball head seat (14) is installed on the crawler chassis (5); the cylinder body of the hydraulic cylinder (7) is installed on the top of the upper portion (6) of the support leg.

2. The tower crane leveling device according to claim 1, characterized in that: The leveling nut (9) is in the shape of a circular ring.

3. A tower crane leveling method, characterized in that: The leveling device for a tower crane according to any one of claims 1 to 2 is used for adjustment, comprising: Get the height difference between the front end and the end of the boom; In response to the height difference not being equal to 0, the length of each leg is adjusted according to the obtained height difference using a leveling device provided in each leg so that the height difference between the front end and the end of the boom is 0; The method further comprises: adjusting the length of each leg by using a leveling device provided in each leg according to the obtained height difference; In response to the height difference being a negative number, the driving mechanism (11) in the leg near the end of the boom drives the inner ring (16) to drive the leveling nut (9) to rotate, so that the leveling nut (9) drives the upper part (6) of the leg to move downward, thereby shortening the current leg length; and / or, in response to the height difference being a negative number, the driving mechanism (11) in the support leg near the front end of the boom drives the inner ring (16) to drive the leveling nut (9) to rotate, so that the leveling nut (9) drives the upper part (6) of the support leg to move upward, thereby lengthening the support leg at the front end of the boom; and / or, in response to the height difference being a positive number, the driving mechanism (11) in the support leg near the front end of the boom drives the inner ring (16) to drive the leveling nut (9) to rotate, so that the leveling nut (9) drives the upper part (6) of the support leg to move downward, thereby shortening the current support leg length; and / or, in response to a positive height difference, the driving mechanism (11) in the leg near the end of the boom drives the inner ring (16) to drive the leveling nut (9) to rotate, so that the leveling nut (9) drives the upper part (6) of the leg to move upward, thereby lengthening the current leg length; When the length of each support leg (4) is adjusted by using the leveling device provided in each support leg (4), the load on the upper part of the tower crane is shared or borne by using the hydraulic oil cylinder (7) provided in the support leg (4).

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