A portal crane

Abstract

This utility model discloses a gantry crane, comprising a column assembly, a balance beam assembly, a tie rod assembly, and a boom assembly. The balance beam assembly and the boom assembly are hinged to the column assembly, and both ends of the tie rod assembly are hinged to the balance beam assembly and the boom assembly, respectively. It also includes a first connecting rod assembly and a second connecting rod assembly. When the gantry crane is under maintenance, the boom assembly is in its minimum amplitude position, connected to the column assembly via the first connecting rod assembly. The balance beam assembly is also in its minimum amplitude position, connected to the column assembly via the second connecting rod assembly. This utility model has the advantages of high construction efficiency, low cost, and low safety risk.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a gantry crane. Background Technology

[0002] The column and balancing system are key structural components of a gantry crane. They are complex, heavy, have numerous hinge points, and operate at high frequencies, requiring regular maintenance and repair of all components. Repairs to components such as the small tie rod hinge point or the luffing rack hinge point, which require replacing bearings or other parts, are difficult and pose significant safety risks. Disassembly and repair of this part typically involves using a large mobile crane to sequentially disassemble the boom assembly, balancing beam assembly, and small tie rod assembly, replacing individual components, and then reassembling the components using the same mobile crane. This method is inefficient, costly, and carries significant safety risks. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a gantry crane with high construction efficiency, low cost and low safety risk.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A gantry crane includes a column assembly, a balance beam assembly, a tie rod assembly, and a boom assembly. The balance beam assembly and the boom assembly are respectively hinged to the column assembly. The two ends of the tie rod assembly are respectively hinged to the balance beam assembly and the boom assembly. The crane also includes a first link assembly and a second link assembly. When the gantry crane is under maintenance, the boom assembly is in its minimum position, the boom assembly is connected to the column assembly through the first link assembly, the balance beam assembly is in its minimum position, and the balance beam assembly is connected to the column assembly through the second link assembly.

[0005] As a further improvement to the above technical solution: The first link assembly includes a first link, a first support, and a second support. The first support is mounted on the column assembly, and the second support is mounted on the boom assembly. When the gantry crane is under maintenance, the two ends of the first link are hinged to the first support and the second support, respectively.

[0006] The first support is located on the beam of the boom assembly near the boom assembly, and the second support is located on the beam of the boom assembly near the boom assembly.

[0007] One end of the first connecting rod is detachably hinged to the second support. When the gantry crane is not in a maintenance or repair state, the first connecting rod is disconnected from the second support.

[0008] The first link assembly also includes a first pin, and the first link is hinged to the first support and the second support via the first pin.

[0009] The second link assembly includes a second link, a third support, and a fourth support. The third support is mounted on the column assembly, and the fourth support is mounted on the balance beam assembly. When the gantry crane is under maintenance, the two ends of the second link are hinged to the third support and the fourth support, respectively.

[0010] The third support is located on the beam of the column assembly near the balance beam assembly.

[0011] The fourth support is located on the counterweight box of the balance beam assembly near the column assembly.

[0012] One end of the second link is detachably hinged to the fourth support. When the gantry crane is not in a maintenance or repair state, the second link is disconnected from the fourth support.

[0013] The second link assembly also includes a second pin, through which the second link is hinged to the third support and the fourth support.

[0014] Compared with the prior art, the advantages of this utility model are: 1. When the gantry crane of this utility model is in maintenance or repair mode, the boom assembly and the balance beam assembly are retracted to their minimum amplitude under the action of the luffing mechanism. The boom assembly is reliably connected to the column assembly through the first connecting rod assembly, so that the small tie rod assembly and the balance beam assembly no longer bear the self-weight of the boom assembly. The balance beam assembly is reliably connected to the column assembly through the second connecting rod assembly, so that the small tie rod assembly and the boom assembly no longer bear the self-weight of the balance beam assembly. This facilitates maintenance and repair work on components such as the small tie rod hinge point and the luffing rack hinge point. It eliminates the need to use a large mobile crane to disassemble the boom assembly, the balance beam assembly, the small tie rod assembly, and other components in sequence, resulting in high construction efficiency, low cost, and significantly reduced safety risks.

[0015] 2. When the gantry crane of this utility model is in a non-maintenance and repair state, that is, in normal working state, the first connecting rod and the second support are disassembled. At this time, the first connecting rod is only hinged to the first support on the column assembly. The first connecting rod hangs down under the action of gravity and is close to the side of the column assembly, reducing the impact on the normal operation of the gantry crane.

[0016] 3. In the gantry crane of this utility model, the column assembly, the balance beam assembly, and the second connecting rod are hinged to each other, and the three of them form a stable truss that cannot move. The self-weight of the balance beam assembly can be entirely supported by the column assembly, and the structure is stable.

[0017] 4. When the gantry crane of this utility model is in a non-maintenance and repair state, that is, in normal working state, the second connecting rod and the fourth support are disassembled. At this time, the second connecting rod is only hinged to the third support on the column assembly. The second connecting rod hangs down under the action of gravity and is close to the side of the column assembly, reducing the impact on the normal operation of the gantry crane.

[0018] 5. In the case of a gantry crane of this utility model, the first link assembly and the second link assembly also have the function of stabilizing the boom assembly and the balance beam assembly in the event of a storm, so as to prevent the boom assembly and the balance beam assembly from swaying significantly due to the storm and causing an accident or damage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the gantry crane of this utility model.

[0020] Legend: 1. Column assembly; 2. Balance beam assembly; 3. Small tie rod assembly; 4. Boom assembly; 5. First link assembly; 51. First link; 52. First support; 53. Second support; 54. First pin; 6. Second link assembly; 61. Second link; 62. Third support; 63. Fourth support; 64. Second pin. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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 this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" 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 utility model according to the specific circumstances.

[0025] like Figure 1 As shown, the gantry crane of this embodiment includes a column assembly 1, a balance beam assembly 2, a small tie rod assembly 3, and a boom assembly 4. The balance beam assembly 2 and the boom assembly 4 are respectively hinged to the column assembly 1. The two ends of the small tie rod assembly 3 are respectively hinged to the balance beam assembly 2 and the boom assembly 4. It also includes a first connecting rod assembly 5 and a second connecting rod assembly 6. When the gantry crane is under maintenance, the boom assembly 4 is in the minimum amplitude position. The boom assembly 4 is connected to the column assembly 1 through the first connecting rod assembly 5. The balance beam assembly 2 is in the minimum amplitude position. The balance beam assembly 2 is connected to the column assembly 1 through the second connecting rod assembly 6.

[0026] In this embodiment, when the gantry crane is under maintenance, the boom assembly 4 and the balance beam assembly 2 are retracted to their minimum amplitude under the action of the luffing mechanism (not shown in the figure). The boom assembly 4 is reliably connected to the column assembly 1 through the first connecting rod assembly 5, so that the tie rod assembly 3 and the balance beam assembly 2 no longer bear the self-weight of the boom assembly 4. The balance beam assembly 2 is reliably connected to the column assembly 1 through the second connecting rod assembly 6, so that the tie rod assembly 3 and the boom assembly 4 no longer bear the self-weight of the balance beam assembly 2. This facilitates maintenance of components such as the tie rod hinge point and the luffing rack hinge point. It eliminates the need to use a large mobile crane to disassemble the boom assembly, balance beam assembly, tie rod assembly, and other components sequentially, resulting in high construction efficiency, low cost, and significantly reduced safety risks.

[0027] Furthermore, in this embodiment, the first link assembly 5 includes a first link 51, a first support 52, and a second support 53. The first support 52 is mounted on the column assembly 1, and the second support 53 is mounted on the boom assembly 4. When the gantry crane is under maintenance, both ends of the first link 51 are hinged to the first support 52 and the second support 53, respectively. The column assembly 1, the boom assembly 4, and the first link 51 are hinged to each other, forming a stable truss that cannot move. The self-weight of the boom assembly 4 can be entirely supported by the column assembly 1, resulting in a stable structure. In the event of a storm, it can prevent the boom assembly 4 from swaying significantly and causing accidents or damage.

[0028] Furthermore, in this embodiment, the first support 52 is located on the beam of the column assembly 1 near the boom assembly 4, and the second support 53 is located on the beam of the boom assembly 4 near the column assembly 1, so that the first connecting rod 51 can be hingedly connected to the first support 52 and the second support 53.

[0029] Furthermore, in this embodiment, one end of the first connecting rod 51 is detachably hinged to the second support 53. When the gantry crane is in a non-maintenance state, the first connecting rod 51 is detached from the second support 53. When the gantry crane is in a non-maintenance state, i.e., in normal operation, the first connecting rod 51 is detached from the second support 53. At this time, the first connecting rod 51 is only hinged to the first support 52 on the column assembly 1. The first connecting rod 51 hangs down under the action of gravity, close to the side of the column assembly 1, reducing the impact on the normal operation of the gantry crane.

[0030] Furthermore, in this embodiment, the first connecting rod assembly 5 also includes a first pin 54, and the first connecting rod 51 is hinged to the first support 52 and the second support 53 via the first pin 54. The hinged connection via the pin is simple in structure and convenient and quick to assemble and disassemble.

[0031] Furthermore, in this embodiment, the second link assembly 6 includes a second link 61, a third support 62, and a fourth support 63. The third support 62 is mounted on the column assembly 1, and the fourth support 63 is mounted on the balance beam assembly 2. When the gantry crane is under maintenance, both ends of the second link 61 are hinged to the third support 62 and the fourth support 63, respectively. The column assembly 1, the balance beam assembly 2, and the second link 61 are hinged to each other, forming a stable truss that cannot move. The self-weight of the balance beam assembly 2 can be entirely supported by the column assembly 1, resulting in a stable structure. In the event of a storm, it can prevent the balance beam assembly 2 from swaying significantly and causing accidents or damage.

[0032] Furthermore, in this embodiment, the third support 62 is located on the beam of the column assembly 1 near the side of the balance beam assembly 2, and the fourth support 63 is located on the counterweight box of the balance beam assembly 2 near the side of the column assembly 1, so that the second connecting rod 61 can be hingedly connected to the third support 62 and the fourth support 63.

[0033] Furthermore, in this embodiment, one end of the second connecting rod 61 is detachably hinged to the fourth support 63. When the gantry crane is in a non-maintenance state, the second connecting rod 61 is detached from the fourth support 63. When the gantry crane is in a non-maintenance state, i.e., in normal operation, the second connecting rod 61 is detached from the fourth support 63. At this time, the second connecting rod 61 is only hinged to the third support 62 on the column assembly 1. The second connecting rod 61 hangs down under the action of gravity, close to the side of the column assembly 1, reducing the impact on the normal operation of the gantry crane.

[0034] Furthermore, in this embodiment, the second connecting rod assembly 6 also includes a second pin 64, and the second connecting rod 61 is hinged to the third support 62 and the fourth support 63 via the second pin 64. The hinged connection via a pin is simple in structure and convenient and quick to assemble and disassemble.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the spirit and technical solution of the present utility model. Therefore, any simple modifications, equivalent substitutions, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A gantry crane, comprising a column assembly (1), a balance beam assembly (2), a tie rod assembly (3), and a boom assembly (4), wherein the balance beam assembly (2) and the boom assembly (4) are respectively hinged to the column assembly (1), and both ends of the tie rod assembly (3) are respectively hinged to the balance beam assembly (2) and the boom assembly (4), characterized in that: It also includes the first link assembly (5) and the second link assembly (6); When the gantry crane is under maintenance, the boom assembly (4) is in the minimum amplitude position, the boom assembly (4) is connected to the column assembly (1) through the first connecting rod assembly (5), the balance beam assembly (2) is in the minimum amplitude position, and the balance beam assembly (2) is connected to the column assembly (1) through the second connecting rod assembly (6).

2. The gantry crane according to claim 1, characterized in that: The first link assembly (5) includes a first link (51), a first support (52) and a second support (53). The first support (52) is mounted on the column assembly (1) and the second support (53) is mounted on the boom assembly (4). When the gantry crane is in maintenance, the two ends of the first link (51) are hinged to the first support (52) and the second support (53) respectively.

3. The gantry crane according to claim 2, characterized in that: The first support (52) is located on the beam of the column assembly (1) near the boom assembly (4), and the second support (53) is located on the beam of the boom assembly (4) near the column assembly (1).

4. The gantry crane according to claim 2, characterized in that: One end of the first connecting rod (51) is detachably hinged to the second support (53). When the gantry crane is in a non-maintenance state, the first connecting rod (51) and the second support (53) are detached.

5. The gantry crane according to claim 2, characterized in that: The first link assembly (5) also includes a first pin (54), and the first link (51) is hinged to the first support (52) and the second support (53) through the first pin (54).

6. The gantry crane according to any one of claims 1 to 5, characterized in that: The second link assembly (6) includes a second link (61), a third support (62) and a fourth support (63). The third support (62) is located on the column assembly (1) and the fourth support (63) is located on the balance beam assembly (2). When the gantry crane is in maintenance, the two ends of the second link (61) are hinged to the third support (62) and the fourth support (63) respectively.

7. The gantry crane according to claim 6, characterized in that: The third support (62) is located on the beam of the column assembly (1) on the side close to the balance beam assembly (2).

8. The gantry crane according to claim 6, characterized in that: The fourth support (63) is located on the counterweight box of the balance beam assembly (2) on the side close to the column assembly (1).

9. The gantry crane according to claim 6, characterized in that: One end of the second link (61) is detachably hinged to the fourth support (63). When the gantry crane is in a non-maintenance state, the second link (61) is detached from the fourth support (63).

10. The gantry crane according to claim 6, characterized in that: The second link assembly (6) also includes a second pin (64), and the second link (61) is hinged to the third support (62) and the fourth support (63) via the second pin (64).

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