Leveling structure, climbing arch crane and leveling method

Abstract

This invention provides a leveling structure, an arch-climbing crane, and a leveling method, relating to the field of lifting and transport equipment technology. The leveling structure uses a support rod and an upper crossbeam as the connection between the lower and upper chassis structures of the arch-climbing crane. The lower end of the support rod can be hinged to the rear end of the lower chassis structure, while the upper crossbeam can be hinged to the upper chassis structure. The upper crossbeam is slidably mounted on the support rod. A drive mechanism is also provided, which is driven to move the upper crossbeam back and forth along the support rod. The entire leveling process converts the sliding of the upper crossbeam into the rotation of the upper chassis structure. Operation is simple and convenient, and the movement stability of the upper crossbeam along the support rod is high, avoiding the drawbacks of screw thread transmission. Furthermore, the drive mechanism can fine-tune the upper crossbeam as needed, effectively ensuring the accuracy of leveling, thereby significantly improving the working stability and efficiency of the arch-climbing crane.

Description

Technical Field

[0001] This invention relates to the field of lifting and transport equipment technology, and more specifically, to a leveling structure, an arch-climbing crane, and a leveling method. Background Technology

[0002] Arch bridges are a common type of bridge. Because of their arched decks, arch-climbing cranes are generally used as lifting equipment for bridge deck construction to facilitate horizontal lifting during the construction process.

[0003] In arch-climbing cranes, a lower chassis structure typically travels along the bridge deck, while an upper chassis structure supports the crane. The lower and upper chassis structures are hinged together, and the angle between them is adjusted to keep the upper chassis structure level, thus keeping the crane level. However, as the lower chassis structure travels along the arch beam, its angle with the horizontal changes with the arch beam's inclination. Therefore, to ensure the upper chassis structure remains level at all times, a leveling mechanism is used to adjust the angle between the upper and lower chassis structures.

[0004] However, current leveling structures generally use threaded engagement for adjustment, which can easily lead to inconsistent thread engagement during use. This damages the transmission structure of the screw thread, seriously affecting the adjustment stability and accuracy of the leveling structure, and consequently impacting the working stability and efficiency of the arch-climbing crane. Summary of the Invention

[0005] The problem solved by this invention is how to ensure the adjustment stability and accuracy of the leveling structure in order to improve the working stability and efficiency of the arch-climbing crane.

[0006] To address the above problems, the present invention provides a leveling structure, comprising:

[0007] A support rod, one end of which is hinged to the lower chassis structure of the arch-climbing crane;

[0008] The upper crossbeam is slidably mounted on the support rod and is hinged to the upper chassis structure of the climbing arch crane.

[0009] A drive mechanism is mounted on the support rod and is driven to the upper crossbeam. The drive mechanism is used to drive the upper crossbeam to reciprocate along the support rod to adjust the distance between the upper chassis structure and the lower chassis structure.

[0010] Compared to existing technologies, the advantages of the leveling structure of this invention include: a support rod and an upper crossbeam are provided as the connection structure between the lower and upper chassis structures of the arch-climbing crane. The lower end of the support rod can be hinged to the rear end of the lower chassis structure, while the upper crossbeam can be hinged to the upper chassis structure. The upper crossbeam is slidably mounted on the support rod. A drive mechanism is also provided, which is driven to the upper crossbeam. This drive mechanism can drive the upper crossbeam to reciprocate along the support rod. Thus, when the angle between the upper and lower chassis structures needs to be increased, the drive mechanism drives the upper crossbeam towards the upper end of the support rod, thereby causing the rear end of the upper chassis structure to move upwards. When the angle between the upper and lower chassis structures needs to be increased, the drive mechanism drives the upper crossbeam towards the upper end of the support rod, thereby causing the rear end of the upper chassis structure to move upwards. When the angle between the lower chassis structures needs to be reduced, the drive mechanism drives the upper crossbeam to move towards the lower end of the support rod, thereby causing the rear end of the upper chassis structure to move downward. This allows the upper chassis structure to rotate around the lower chassis structure in two directions, making it easier to maintain the level of the upper chassis structure. The entire leveling process converts the sliding of the upper crossbeam into the rotation of the upper chassis structure, making the operation simple and convenient. The upper crossbeam has high stability in moving along the support rod, avoiding the drawbacks of the screw thread transmission method. Furthermore, the drive mechanism can fine-tune the upper crossbeam as needed, effectively ensuring the accuracy of leveling, thereby effectively improving the working stability and efficiency of the arch-climbing crane.

[0011] Optionally, the driving mechanism includes a lower crossbeam and a telescopic driving member. The lower crossbeam is mounted on the support rod, and the telescopic driving member is mounted on the end face of the lower crossbeam facing the upper crossbeam and is drivenly connected to the upper crossbeam. The telescopic driving member is used to drive the upper crossbeam to reciprocate along the support rod.

[0012] Optionally, the number of telescopic drive components is two, and the two telescopic drive components are symmetrically arranged on the lower crossbeam about the support rod. The telescopic drive component is a telescopic cylinder or a telescopic hydraulic cylinder.

[0013] Optionally, the drive mechanism further includes a fixing bolt, the support rod is a threaded rod, the fixing bolt is sleeved on the support rod and located on the side of the lower crossbeam away from the upper crossbeam, the lower crossbeam is slidably mounted on the support rod, and the fixing bolt is used to rotate around the support rod and abut against the lower crossbeam.

[0014] Optionally, two hinge rings are symmetrically provided at both ends of the upper crossbeam, the line connecting the two hinge rings is perpendicular to the line connecting the two telescopic drive members, the support rod is located at the midpoint of the line connecting the two hinge rings, and the hinge rings are used to hinge with the upper chassis structure.

[0015] Optionally, a support platform is provided on the end face of the lower crossbeam away from the upper crossbeam, the diameter of the support platform is greater than or equal to the distance between the two telescopic drive members, and the diameter of the fixing bolt is equal to the diameter of the support platform.

[0016] Optionally, the leveling structure further includes an upper conversion sleeve, the inner wall of which is provided with a first thread. The upper conversion sleeve is sleeved on the support rod and located on the side of the upper crossbeam away from the lower crossbeam. When the upper crossbeam moves into position, the upper conversion sleeve is used to rotate around the support rod and abut against the upper crossbeam so that the telescopic drive member can drive the lower crossbeam to move toward the upper crossbeam.

[0017] Optionally, the leveling structure further includes a lower conversion sleeve, the inner wall of which is provided with a second thread. The lower conversion sleeve is sleeved on the support rod and located between the upper crossbeam and the lower crossbeam. The lower conversion sleeve is used to rotate around the support rod and abut against the upper crossbeam.

[0018] On the other hand, the present invention also provides an arch-climbing crane including an upper chassis structure, a lower chassis structure, a crane, and an adjustment structure as described above. The crane is mounted on the upper chassis structure, the front end of the upper chassis structure is hinged to the front end of the lower chassis structure, and the lower chassis structure is used to travel along the arch beam.

[0019] Compared to the prior art, the beneficial effects of the arch-climbing crane of the present invention are the same as those of the leveling structure described above, and will not be repeated here.

[0020] Furthermore, the present invention also provides a leveling method applied to the adjustment structure described above, the leveling method comprising:

[0021] When the angle between the upper chassis structure and the lower chassis structure of the arch-climbing crane needs to be increased, the driving mechanism of the leveling structure drives the upper crossbeam of the leveling structure to move away from the lower chassis structure, thereby driving the upper chassis structure to move away from the lower chassis structure.

[0022] When the angle between the upper chassis structure and the lower chassis structure of the climbing arch crane needs to be reduced, the upper crossbeam is driven to move toward the lower chassis structure by the drive mechanism, thereby driving the upper chassis structure to move toward the lower chassis structure.

[0023] Compared to the prior art, the beneficial effects of the leveling method of the present invention are the same as those of the leveling structure described above, and will not be repeated here. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the leveling structure from one perspective in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the leveling structure from another perspective in an embodiment of the present invention;

[0026] Figure 3This is a schematic diagram of the leveling structure in the locking state in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the movement of the conversion sleeve during leveling in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the movement of the telescopic drive component during leveling in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the movement of the lower conversion sleeve during leveling in an embodiment of the present invention;

[0030] Figure 7 This is another schematic diagram of the movement of the telescopic drive component during leveling in an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the movement of the fixing bolts during leveling in this embodiment of the invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Support rod; 2. Upper crossbeam; 3. Drive mechanism; 31. Lower crossbeam; 32. Telescopic drive component; 33. Fixing bolt; 4. Upper conversion sleeve; 5. Lower conversion sleeve; 6. Upper chassis structure. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] It should be noted that in the XYZ coordinate system provided herein, the positive direction of the X-axis represents the right, and the negative direction of the X-axis represents the left; the positive direction of the Y-axis represents the rear, and the negative direction of the Y-axis represents the front; the positive direction of the Z-axis represents the top, and the negative direction of the Z-axis represents the bottom. Furthermore, it should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein.

[0036] On one hand, one embodiment of the present invention provides a leveling structure, including: a support rod 1, one end of which is hinged to the lower chassis structure of the arch-climbing crane; an upper crossbeam 2, which is slidably mounted on the support rod 1 and is hinged to the upper chassis structure 6 of the arch-climbing crane; and a drive mechanism 3, which is mounted on the support rod 1, drivenly connected to the upper crossbeam 2, and used to drive the upper crossbeam 2 to reciprocate along the support rod 1 to adjust the distance between the upper chassis structure 6 and the lower chassis structure.

[0037] like Figure 1 and Figure 2 As shown, in this embodiment, a support rod 1 and an upper crossbeam 2 are provided as the connection structure between the lower chassis structure and the upper chassis structure 6 of the climbing arch crane. The front end of the lower chassis structure (i.e., the positive end of the X-axis) is hinged to the front end of the upper chassis structure 6, and the lower end of the support rod 1 (i.e., the negative end of the Z-axis) can be hinged to the rear end of the lower chassis structure (i.e., the negative end of the X-axis). The upper crossbeam 2 can be hinged to the upper chassis structure 6. The upper crossbeam 2 is slidably mounted on the support rod 1. A drive mechanism 3 is also provided that is driven to the upper crossbeam 2. The drive mechanism 3 can drive the upper crossbeam 2 to reciprocate along the support rod 1. Thus, when the angle between the upper chassis structure 6 and the lower chassis structure needs to be increased, the drive mechanism 3 drives the upper crossbeam 2 to move toward the upper end of the support rod 1 (i.e., the positive end of the Z-axis). This causes the rear end of the upper chassis structure 6 to move upward. When the angle between the upper chassis structure 6 and the lower chassis structure needs to be reduced, the drive mechanism 3 drives the upper crossbeam 2 to move towards the lower end of the support rod 1, thereby causing the rear end of the upper chassis structure 6 to move downward. This allows the upper chassis structure 6 to rotate around the lower chassis structure in two directions, making it easier to keep the upper chassis structure 6 level. The entire leveling process converts the sliding of the upper crossbeam 2 into the rotation of the upper chassis structure 6. The operation is simple and convenient. The movement stability of the upper crossbeam 2 along the support rod 1 is high, avoiding the drawbacks of the screw thread transmission method. Moreover, the drive mechanism 3 can make fine adjustments to the upper crossbeam 2 as needed, effectively ensuring the accuracy of leveling, thereby effectively improving the working stability and efficiency of the arch-climbing crane.

[0038] It should be noted that in this embodiment, when the angle between the upper chassis structure 6 and the lower chassis structure changes, the tilt angle of the support rod 1 also changes. The upper crossbeam 2 is hinged to the upper chassis structure 6, and the upper crossbeam 2 can rotate adaptively with the support rod 1, thereby always maintaining a sliding installation on the support rod 1, which can effectively ensure the leveling stability of the leveling structure.

[0039] It should be noted that, in this embodiment, as Figure 2 As shown, a connector is provided on the lower end face of the support rod 1, and the support rod 1 can be hinged to the lower chassis structure through the connector.

[0040] Optionally, the drive mechanism 3 includes a lower crossbeam 31 and a telescopic drive member 32. The lower crossbeam 31 is mounted on the support rod 1, and the telescopic drive member 32 is mounted on the end face of the lower crossbeam 31 facing the upper crossbeam 2 and is drivenly connected to the upper crossbeam 2. The telescopic drive member 32 is used to drive the upper crossbeam 2 to reciprocate along the support rod 1.

[0041] In this embodiment, as Figures 1 to 2As shown, a lower crossbeam 31 and a telescopic drive component 32 are configured to cooperate in driving the upper crossbeam 2 to reciprocate along the support rod 1. The lower crossbeam 31 is mounted on the support rod 1, and the telescopic drive component 32 is mounted between the lower crossbeam 31 and the upper crossbeam 2. One end of the telescopic drive component 32 is connected to the lower crossbeam 31, and the other end is driven to the upper crossbeam 2. The telescopic drive component 32 can drive the upper crossbeam 2 to reciprocate along the support rod 1. Thus, when the telescopic drive component 32 outputs thrust or pull, the lower crossbeam 31 can provide support for the telescopic drive component 32, thereby causing the upper crossbeam 2 to bear the thrust or pull and reciprocate along the support rod 1, thereby achieving the purpose of adjusting the angle between the upper chassis structure 6 and the lower chassis structure.

[0042] Optionally, there are two telescopic drive components 32, which are symmetrically arranged on the lower crossbeam 31 about the support rod 1. The telescopic drive component 32 is a telescopic cylinder or a telescopic hydraulic cylinder.

[0043] like Figure 1 and Figure 2 In this embodiment, the number of telescopic drive members 32 is set to two. The two telescopic drive members 32 are symmetrically arranged on the lower crossbeam 31 about the support rod 1. In this way, when the telescopic drive member 32 outputs thrust or pull, this thrust or pull can be symmetrical about the support rod 1, thereby keeping the posture of the support rod 1 from being affected by the thrust or pull output by the telescopic drive member 32, and thus maintaining the stability of the upper crossbeam 2 when the support rod 1 is reciprocating.

[0044] In this embodiment, the telescopic drive component 32 is a telescopic cylinder. In other embodiments of the present invention, the telescopic drive component 32 may also be a telescopic hydraulic cylinder.

[0045] Optionally, the drive mechanism 3 also includes a fixing bolt 33. The support rod 1 is a threaded rod. The fixing bolt 33 is sleeved on the support rod 1 and located on the side of the lower crossbeam 31 away from the upper crossbeam 2. The lower crossbeam 31 is slidably mounted on the support rod 1. The fixing bolt 33 is used to rotate around the support rod 1 and abut against the lower crossbeam 31.

[0046] like Figures 1 to 2 As shown, in this embodiment, the drive mechanism 3 further includes a fixing bolt 33, which is sleeved on the support rod 1 and located below the lower crossbeam 31. The support rod 1 is a threaded rod, and the fixing bolt 33 can be stably installed on the support rod 1 and can rotate around the support rod 1 to abut against the lower crossbeam 31. In this way, when the telescopic drive member 32 outputs thrust, the lower crossbeam 31 is subjected to a reaction force, and the fixing bolt 33 can provide support force for the lower crossbeam 31, thereby further ensuring the stability of the telescopic drive member 32 when it outputs thrust.

[0047] Optionally, two hinge rings are symmetrically provided at both ends of the upper crossbeam 2. The line connecting the two hinge rings is perpendicular to the line connecting the two telescopic drive members 32. The support rod 1 is located at the midpoint of the line connecting the two hinge rings. The hinge rings are used to hinge with the upper chassis structure 6.

[0048] In this embodiment, as Figure 1 and Figure 2 As shown, two hinge rings are symmetrically arranged at both ends of the upper crossbeam 2 along the Y-axis, and the line connecting the two hinge rings is perpendicular to the line connecting the two telescopic drive components 32. The upper crossbeam 2 can be hinged to the upper chassis structure 6 through the hinge rings, and the support rod 1 is located at the midpoint of the line connecting the two hinge rings. In this way, when the upper crossbeam 2 moves along the support rod 1, the two hinge rings rotate in coordination, driving the upper chassis structure 6 to rotate, ensuring the stability during leveling. The support rod 1 will not interfere with the telescopic drive component 32 and the hinge rings, further ensuring the working stability of the leveling structure.

[0049] It should be noted that, in this embodiment, as Figure 2 As shown, the upper crossbeam 2 has annular grooves on the protrusions at both ends along the Y-axis. The end of the hinge ring is set in the annular groove and fixed, maintaining the connection stability between the hinge ring and the upper crossbeam 2.

[0050] Optionally, a support platform is provided on the end face of the lower crossbeam 31 opposite to the upper crossbeam 2. The diameter of the support platform is greater than or equal to the distance between the two telescopic drive members 32, and the diameter of the fixing bolt 33 is equal to the diameter of the support platform.

[0051] In this embodiment, as Figures 1 to 2 On the end face of the lower crossbeam 31 that is away from the upper crossbeam 2, i.e., the end face of the lower crossbeam 31 facing the opposite direction of the Z-axis, there is a support platform. The direct distance of the support platform is greater than or equal to the direct distance between the two telescopic drive members 32, and the diameter of the fixing bolt 33 is equal to the diameter of the support platform. In this way, when the fixing bolt 33 abuts against the support platform, it can effectively support the telescopic drive member 32. Moreover, through the transition of the support platform, it can avoid excessive pressure between the fixing bolt 33 and the lower crossbeam 31, which could lead to deformation, thus ensuring the structural stability of the leveling structure.

[0052] Optionally, the leveling structure also includes an upper conversion sleeve 4. The inner wall of the upper conversion sleeve 4 is provided with a first thread. The upper conversion sleeve 4 is sleeved on the support rod 1 and is located on the side of the upper crossbeam 2 away from the lower crossbeam 31. When the upper crossbeam 2 moves into place, the upper conversion sleeve 4 is used to rotate around the support rod 1 and abut against the upper crossbeam 2 so that the telescopic drive member 32 can drive the lower crossbeam 31 to move toward the upper crossbeam 2.

[0053] In this embodiment, as Figure 1 and Figure 2As shown, an upper conversion sleeve 4 is also provided. The inner wall of the upper conversion sleeve 4 is provided with a first thread. The upper conversion sleeve 4 is sleeved on the support rod 1 and located above the upper crossbeam 2. In this way, when the telescopic drive component 32 outputs thrust to drive the upper crossbeam 2 to a suitable position, the upper conversion sleeve 4 can be rotated around the support rod 1 and abut against the upper crossbeam 2, thereby ensuring that the upper crossbeam 2 will not move upward, thus ensuring the accuracy of leveling and preventing the upper crossbeam 2 from moving upward due to thrust fluctuation when the telescopic drive component 32 outputs thrust.

[0054] Optionally, the leveling structure also includes a lower conversion sleeve 5. The inner wall of the lower conversion sleeve 5 is provided with a second thread. The lower conversion sleeve 5 is sleeved on the support rod 1 and located between the upper crossbeam 2 and the lower crossbeam 31. The lower conversion sleeve 5 is used to rotate around the support rod 1 and abut against the upper crossbeam 2.

[0055] In this embodiment, as Figures 1 to 8 As shown, a lower conversion sleeve 5 is also provided. The inner wall of the lower conversion sleeve 5 is provided with a second thread. The lower conversion sleeve 5 is sleeved on the support rod 1 and is located between the upper crossbeam 2 and the lower crossbeam 31. The lower conversion sleeve 5 can rotate around the support rod 1 and abut against the upper crossbeam 2. In this way, when the telescopic drive member 32 drives the upper crossbeam 2 to move to a suitable position, both the upper conversion sleeve 4 and the lower conversion sleeve 5 can rotate around the support rod 1 and abut against the upper crossbeam 2 respectively to position the upper crossbeam 2. At this time, the telescopic drive member 32 can output a reverse pulling force to move the lower crossbeam 31 upward. When the telescopic drive member 32 is fully retracted, the fixing bolt 33 rotates around the support rod 1 and abuts against the lower crossbeam 31, so that both the upper crossbeam 2 and the lower crossbeam 31 maintain stability, and the telescopic drive member 32 remains in the retracted state, avoiding the telescopic drive member 32 being in the state of outputting thrust for a long time, thereby maintaining the structural stability of the leveling structure.

[0056] On the other hand, one embodiment of the present invention provides an arch-climbing crane, including an upper chassis structure 6, a lower chassis structure, a crane, and the aforementioned adjustment structure. The crane is mounted on the upper chassis structure 6, and the front end of the upper chassis structure 6 is hinged to the front end of the lower chassis structure. The lower chassis structure is used to travel along the arch beam.

[0057] like Figures 1 to 8 As shown, the technical effect of the arch-climbing crane in this embodiment is similar to that of the leveling structure described above, and will not be repeated here.

[0058] In another aspect, one embodiment of the present invention provides a leveling method applied to the above-mentioned adjustment structure. The leveling method includes: when the angle between the upper chassis structure 6 and the lower chassis structure of the arch-climbing crane needs to be increased, the upper crossbeam 2 of the leveling structure is driven to move away from the lower chassis structure by the driving mechanism 3 of the leveling structure, so as to drive the upper chassis structure 6 to move away from the lower chassis structure; when the angle between the upper chassis structure 6 and the lower chassis structure of the arch-climbing crane needs to be decreased, the upper crossbeam 2 is driven to move towards the lower chassis structure by the driving mechanism 3, so as to drive the upper chassis structure 6 towards the lower chassis structure.

[0059] like Figures 1 to 8 As shown, the leveling method in this embodiment has similar technical effects to the leveling structure described above, and will not be repeated here.

[0060] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A leveling structure, characterized in that, include: Support rod (1), one end of which is used to be hinged to the lower chassis structure of the climbing arch crane; Upper crossbeam (2), which is slidably mounted on the support rod (1), and is used to hinge with the upper chassis structure (6) of the climbing arch crane; A drive mechanism (3) is mounted on the support rod (1). The drive mechanism (3) is driven to the upper crossbeam (2) and is used to drive the upper crossbeam (2) to reciprocate along the support rod (1) to adjust the distance between the upper chassis structure (6) and the lower chassis structure. The drive mechanism (3) includes a lower crossbeam (31) and a telescopic drive member (32). The lower crossbeam (31) is mounted on the support rod (1), and the telescopic drive member (32) is mounted on the end face of the lower crossbeam (31) facing the upper crossbeam (2). It is driven to connect with the upper crossbeam (2), and the telescopic drive member (32) is used to drive the upper crossbeam (2) to reciprocate along the support rod (1); the drive mechanism (3) also includes a fixing bolt (33), the support rod (1) is a threaded rod, the fixing bolt (33) is sleeved on the support rod (1) and located on the side of the lower crossbeam (31) away from the upper crossbeam (2), the lower crossbeam (31) is slidably installed on the support rod (1), and the fixing bolt (33) is used to rotate around the support rod (1) and abut against the lower crossbeam (31); The upper conversion sleeve (4) has a first thread on its inner wall. The upper conversion sleeve (4) is sleeved on the support rod (1) and located on the side of the upper crossbeam (2) away from the lower crossbeam (31). When the upper crossbeam (2) moves into place, the upper conversion sleeve (4) is used to rotate around the support rod (1) and abut against the upper crossbeam (2) so that the telescopic drive member (32) can drive the lower crossbeam (31) to move toward the upper crossbeam (2).

2. The leveling structure according to claim 1, characterized in that, The number of telescopic drive components (32) is two, and the two telescopic drive components (32) are symmetrically arranged on the lower crossbeam (31) about the support rod (1). The telescopic drive component (32) is a telescopic cylinder or a telescopic oil cylinder.

3. The leveling structure according to claim 2, characterized in that, The upper crossbeam (2) has two hinge rings symmetrically arranged at both ends. The line connecting the two hinge rings is perpendicular to the line connecting the two telescopic drive members (32). The support rod (1) is located at the midpoint of the line connecting the two hinge rings. The hinge ring is used to hinge with the upper chassis structure (6).

4. The leveling structure according to claim 1, characterized in that, The lower crossbeam (31) has a support platform on its end face away from the upper crossbeam (2). The diameter of the support platform is greater than or equal to the distance between the two telescopic drive members (32), and the diameter of the fixing bolt (33) is equal to the diameter of the support platform.

5. The leveling structure according to claim 4, characterized in that, It also includes a lower conversion sleeve (5), the inner wall of which is provided with a second thread. The lower conversion sleeve (5) is sleeved on the support rod (1) and located between the upper crossbeam (2) and the lower crossbeam (31). The lower conversion sleeve (5) is used to rotate around the support rod (1) and abut against the upper crossbeam (2).

6. A climbing arch crane, characterized in that, It includes an upper chassis structure (6), a lower chassis structure, a crane, and an adjustment structure as described in any one of claims 1 to 5, wherein the crane is mounted on the upper chassis structure (6), the front end of the upper chassis structure (6) is hinged to the front end of the lower chassis structure, and the lower chassis structure is used to travel along the arch beam.

7. A leveling method, characterized in that, The leveling method, applied to the adjustment structure as described in any one of claims 1 to 5, comprises: When the angle between the upper chassis structure (6) and the lower chassis structure of the climbing arch crane needs to be increased, the upper crossbeam (2) of the leveling structure is driven away from the lower chassis structure by the driving mechanism (3) of the leveling structure, so as to drive the upper chassis structure (6) to move away from the lower chassis structure. When the angle between the upper chassis structure (6) and the lower chassis structure of the climbing arch crane needs to be reduced, the upper crossbeam (2) is driven to move toward the lower chassis structure by the drive mechanism (3) so as to drive the upper chassis structure (6) to move toward the lower chassis structure.

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