Track chassis components and rail-mounted cranes

Abstract

The present disclosure relates to a track chassis assembly and a track-mounted crane. The track chassis assembly is used for a track-mounted crane that can be converted into multiple tonnages, and includes: multiple roadbed box groups, each roadbed box group includes multiple roadbed boxes that can be arranged in a fan ring or a circular ring along the circumferential direction, and the radius of the fan ring or circular ring corresponding to each roadbed box group is different; and multiple circular tracks, each circular track is in a closed or non-closed circular ring shape; wherein, under the circular track operating condition of the maximum tonnage, the multiple roadbed box groups are arranged as the first bottom foundation of the track-mounted crane, and the multiple roadbed box groups are concentrically and radially arranged, and the multiple circular tracks are concentrically arranged on the upper surface of the first bottom foundation; under the circular track operating condition of at least some other tonnages, at least some of the multiple roadbed box groups are arranged as the second bottom foundation of the track-mounted crane, and some of the multiple circular tracks are concentrically arranged on the upper surface of the second bottom foundation.

Description

Technical Field

[0001] The present disclosure relates to the field of engineering machinery, and in particular to a rail chassis assembly and a rail-mounted crane. Background Art

[0002] With the continuous optimization and upgrading of engineering application fields, from the construction level, hoisting has increasingly emphasized efficiency and safety. The modular prefabrication of large components on the ground and the integrated hoisting of petrochemical tanks are becoming more and more popular. The continuous emergence of super-large and super-heavy equipment hoisting construction has put forward greater and more requirements on the capabilities of lifting machinery. From a technical perspective, the increasing size of lifting machinery will inevitably place higher requirements on the overall structure, mechanism and foundation bearing capacity of the whole machine, which in turn places higher requirements on manufacturing and supporting capabilities. From an operational perspective, according to actual engineering practices, the proportion of super-heavy parts hoisting will not be too high. The vast majority of parts are medium-sized and below. When carrying out medium-sized and below parts, super-large cranes often face the problem of excessively high operating costs. Therefore, how to deal with the problem of meeting the requirements of super-heavy parts hoisting while improving the operational economy of hoisting medium-sized and below parts is an urgent problem that needs to be solved. Summary of the Invention

[0003] In view of this, the embodiments of the present disclosure provide a rail chassis assembly and a rail-mounted crane, which can meet the lifting requirements of super-heavy items while improving the operational economy of lifting medium-sized items and below.

[0004] In one aspect of the present disclosure, there is provided a rail chassis assembly for a rail-mounted crane convertible into multiple tonnages, comprising:

[0005] A plurality of roadbed box groups, each roadbed box group including a plurality of roadbed boxes that can be arranged in a fan ring or a circular ring along the circumferential direction, and the radius of the fan ring or circular ring corresponding to each roadbed box group is different; and

[0006] A plurality of circular tracks, each of which is in the shape of a closed or non-closed ring;

[0007] Wherein, when the rail-mounted crane is in a circular rail operation condition with a maximum tonnage among the multiple tonnages, the multiple roadbed box groups are arranged to form a first bottom foundation of the rail-mounted crane, and the multiple roadbed box groups are concentrically and radially arranged, and the multiple circular rails are concentrically arranged on the upper surface of the first bottom foundation;

[0008] When the rail crane is in a circular rail operating condition with at least part of the tonnage other than the maximum tonnage among the multiple tonnages, at least part of the multiple roadbed box groups are arranged to form the second bottom foundation of the rail crane, and part of the multiple circular rails are concentrically arranged on the upper surface of the second bottom foundation.

[0009] In some embodiments, when the rail mounted crane is in a state of other tonnages among the multiple tonnages, preset gaps or adjustment plates are provided between at least some adjacent subgrade boxes in a portion of the multiple subgrade box groups.

[0010] In some embodiments, the adjustment plate is at least one roadbed box in another part of the plurality of roadbed box groups.

[0011] In some embodiments, the track chassis assembly further comprises:

[0012] Straight track;

[0013] Wherein, when the rail crane is in a straight track operating condition, at least one of the multiple roadbed box groups is arranged as the third bottom foundation of the rail crane, and the straight track is arranged on the upper surface of the third bottom foundation along the first direction, and the multiple roadbed boxes in the at least one roadbed box group are arranged along the first direction, and the relative directions of the long sides and short sides of two adjacent roadbed boxes are opposite and both are perpendicular to the first direction.

[0014] In some embodiments, the plurality of circular tracks includes four circular tracks;

[0015] Wherein, when the rail-mounted crane is in a circular rail operation condition with a maximum tonnage among the multiple tonnages, the four circular rails are concentrically arranged on the upper surface of the first bottom foundation;

[0016] When the rail-mounted crane is in a circular rail operating condition at at least a portion of the tonnages other than the maximum tonnage among the multiple tonnages, any three, any two or any one of the four circular rails are arranged on the upper surface of the second bottom foundation.

[0017] In some embodiments, the plurality of roadbed box groups include: an inner roadbed box group and an outer roadbed box group;

[0018] Wherein, when the rail-mounted crane is in a circular rail operation condition with a maximum tonnage among the multiple tonnages, the inner roadbed box assembly and the outer roadbed box assembly are assembled into the first bottom foundation, and the inner roadbed box assembly is located inside the outer roadbed box assembly;

[0019] When the rail-mounted crane is in a circular rail operation condition at at least a portion of the tonnages other than the maximum tonnage among the multiple tonnages, the inner roadbed box assembly or the outer roadbed box assembly is assembled into the second bottom foundation.

[0020] In one aspect of the present disclosure, there is provided a rail-mounted crane comprising:

[0021] the aforementioned track chassis assembly;

[0022] a plurality of trolley assemblies at least partially disposed on the track chassis assembly;

[0023] an equipment platform connected to the plurality of trolley assemblies;

[0024] a power drive assembly, disposed on the equipment platform and connected to the plurality of trolley assemblies, configured to drive the movement of each trolley assembly disposed on the track chassis assembly; and

[0025] The hoisting assembly is arranged on the equipment platform and connected to the power drive assembly.

[0026] In some embodiments, the trolley assembly includes a track wheel set, a first trolley gimbal, and a second trolley gimbal;

[0027] Wherein, when the rail crane is in the circular rail operating condition of the maximum tonnage among the multiple tonnages, the multiple trolley assemblies are movably arranged on the multiple circular rails of the rail chassis assembly, the rail wheel group in each of the trolley assemblies is connected to the first trolley balance frame and is located at the lower side of the first trolley balance frame, and the second trolley balance frame is connected to the two first trolley balance frames running on two adjacent circular rails or two circular rails separated by at least one circular rail, and is located on the upper side of the two first trolley balance frames.

[0028] In some embodiments, when the rail crane is in a circular rail operating condition of at least part of the tonnage other than the maximum tonnage among the multiple tonnages, a part of the multiple trolley assemblies are movably arranged on at least two circular rails of the rail chassis assembly, the rail wheel set in each of the trolley assemblies is connected to the first trolley balance frame and is located on the lower side of the first trolley balance frame, and the equipment platform is directly connected to the first trolley balance frame, or is connected to the first trolley balance frame through the second trolley balance frame.

[0029] In some embodiments, the lifting assembly includes: a boom system, a counterweight system and an operating system; wherein, the boom system includes a boom having at least one standard boom section, the standard boom section includes at least one group of load-bearing chord structural units and a connecting joint, the connecting joint is arranged at at least one end of the at least one group of load-bearing chord structural units, and the length and cross-sectional size of the standard boom section are respectively determined by the number of groups of load-bearing chord structural units included in the standard boom section and the arrangement of each group of load-bearing chord structural units.

[0030] In some embodiments, when the rail-mounted crane is in the circular rail operation condition at the maximum tonnage among the multiple tonnages, each group of bearing chord structure units includes four bearing chord structure units arranged in a "field" shape in a cross-section perpendicular to the length direction of the standard boom section; when the rail-mounted crane is in the circular rail operation condition at at least some tonnages other than the maximum tonnage among the multiple tonnages, each group of bearing chord structure units includes one or two bearing chord structure units arranged in a cross-section perpendicular to the length direction of the standard boom section.

[0031] In the embodiments of the present disclosure, according to the circular rail operation conditions of different tonnages, some or all of multiple groups of roadbed boxes are selected to arrange the bottom foundation of the rail-mounted crane, and some or all of multiple circular rails are selectively arranged on the bottom foundation, which can meet the requirements of the circular rail operation conditions of different tonnages for the bearing capacity of the foundation while, when forming cranes of different tonnages, make more full use of the components in the rail chassis assembly, improve the utilization rate of these components, and thus improve the economy of the crane. <C

[0032] When the rail-mounted crane is converted to the maximum tonnage, multiple groups of roadbed boxes are used to arrange a larger-area first bottom foundation to improve the bearing capacity of the foundation, and multiple circular rails are used to support multiple trolley assemblies of the rail-mounted crane so as to gradually share the load, reduce the load borne by each circular rail, and reduce the requirements for the local strength and stiffness of the roadbed box groups; when the rail-mounted crane is converted to a lower tonnage, under the condition of meeting the requirements of the bearing capacity of the foundation, some roadbed box groups and some circular rails can be used to meet the bearing and movement requirements of the rail-mounted crane so as to reduce the operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings forming a part of the specification depict embodiments of the present disclosure and, together with the description, are used to explain the principles of the present disclosure.

[0034] Referring to the drawings, the present disclosure can be more clearly understood from the following detailed description, wherein:

[0035] Figure 1 is a schematic installation structure diagram of some embodiments of the rail chassis assembly according to the present disclosure at the first tonnage;

[0036] Figure 2 is a schematic layout diagram of the roadbed box groups in some embodiments of the rail chassis assembly according to the present disclosure;

[0037] Figure 3 is a schematic layout diagram of the circular rails in some embodiments of the rail chassis assembly according to the present disclosure; <0<C0000081

[0038] Figure 4is a schematic diagram of the installation structure of some embodiments of the track chassis assembly disclosed herein at a second tonnage;

[0039] Figure 5 is a schematic diagram of the installation structure of some embodiments of the track chassis assembly according to the present disclosure at the third tonnage;

[0040] Figure 6 is a schematic diagram of the principle of downward load transfer according to some embodiments of the track chassis assembly of the present disclosure;

[0041] Figure 7 is a schematic diagram of the installation structure of some embodiments of the track chassis assembly disclosed herein under straight track operation conditions;

[0042] Figure 8 is a schematic structural diagram of some embodiments of the rail-mounted crane according to the present disclosure;

[0043] Figure 9 Schematic diagram of the structure of a standard boom section in some embodiments of the rail-mounted crane according to the present disclosure.

[0044] It should be understood that the size of each part shown in the drawings is not drawn according to the actual proportional relationship.In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure, its application, or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions, and numerical values set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0046] The terms "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The terms "include" or "comprises" and similar terms mean that the elements before the term include the elements listed after the term, and do not exclude the possibility of also including other elements. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0047] In the present disclosure, when a specific device is described as being located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a specific device is described as being connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be not directly connected to the other device but with an intervening device.

[0048] All terms (including technical or scientific terms) used in this disclosure have the same meaning as those understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined herein.

[0049] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0050] refer to Figures 1-6 In some embodiments of the track chassis assembly disclosed herein, the track chassis assembly is used in a rail-mounted crane that can be converted into multiple tonnages. The track chassis assembly includes: multiple roadbed box assemblies 10 and multiple circular tracks 20. Each roadbed box assembly 10 includes multiple roadbed boxes that can be arranged circumferentially in a fan-shaped or annular shape, and the radius of the fan-shaped or annular shape corresponding to each roadbed box assembly 10 is different.

[0051] refer to Figure 2 , the individual roadbed boxes in the roadbed box group can be arranged in a circular ring or a fan ring. Adjacent roadbed boxes can be connected or a preset distance can be set. In the same roadbed box group, the radial width of each roadbed box is the same, and the radius relative to the center of the circular ring or fan ring is the same, while the circumferential width can be the same or different. The roadbed boxes in different roadbed box groups have different radii relative to the center of the circular ring or fan ring, so that a concentric multi-circle arrangement of roadbed box groups can be achieved.

[0052] Each of the annular tracks 20 is in the form of a closed or non-closed annular ring. The shape of the annular track here is not limited to a closed annular ring, but can also be a non-closed annular ring, i.e., the shape of a segment of an arc. The shape of the annular track can be determined according to the working conditions of the rail crane, and the shape of the annular track can correspond to the shape of the roadbed box group arrangement. For example, a closed annular annular track can be set on multiple roadbed boxes arranged in an annular ring, and a non-closed annular annular track can be set on multiple roadbed boxes arranged in a fan ring.

[0053] When the rail crane is in the circular rail operating condition with the maximum tonnage among the multiple tonnages, the multiple roadbed box groups 10 are arranged to form the first bottom foundation of the rail crane, and the multiple roadbed box groups 10 are concentrically and radially arranged, and the multiple circular rails 20 are concentrically arranged on the upper surface of the first bottom foundation.

[0054] When the rail-mounted crane is converted to its maximum tonnage, multiple roadbed boxes are used to arrange the first bottom foundation with a larger area to increase the bearing capacity of the foundation. Figure 1 and Figure 6 Using multiple circular rails to support multiple trolley assemblies of the rail-mounted crane can share the load step by step, reduce the load borne by each circular rail, and reduce the requirements for the local strength and stiffness of the roadbed box group.

[0055] When the rail crane is in a circular rail operating condition with at least part of the tonnage other than the maximum tonnage among the multiple tonnages, at least part of the multiple roadbed box groups 10 are arranged as the second bottom foundation of the rail crane, and part of the multiple circular rails 20 are concentrically arranged on the upper surface of the second bottom foundation.

[0056] When a rail-mounted crane is converted to a lower tonnage, while meeting the foundation's bearing capacity, part of the roadbed box and part of the circular track can be used to meet the crane's load and movement requirements, thereby reducing operating costs. The unused roadbed box and circular track can be used on the track chassis of other rail-mounted cranes with lower tonnage, thereby improving the utilization rate of the track chassis components.

[0057] In this embodiment, according to the circular rail operating conditions of different tonnages, part or all of the multiple roadbed box groups are selected to arrange the bottom foundation of the rail crane, and part or all of the multiple circular rails are selectively set on the bottom foundation. While meeting the foundation bearing capacity requirements of the circular rail operating conditions of different tonnages, when assembling cranes of different tonnages, the components in the track chassis assembly can be more fully utilized to improve the utilization rate of these components, thereby improving the economic efficiency of the crane.

[0058] For the circular track with non-adjustable diameter, in order to provide it with good foundation bearing effect, in some embodiments, when the rail crane is in the circular track operating condition of at least part of the tonnage other than the maximum tonnage among the multiple tonnages, a preset gap or adjustment plate is provided between at least part of the adjacent roadbed boxes in a part of the multiple roadbed box groups 10, so that the shape and size of the bottom foundation formed by the multiple roadbed boxes in the roadbed box group can be adjusted by the preset gap or adjustment plate, thereby meeting the needs of laying the circular track.

[0059] To further improve the utilization rate of components (e.g., subgrade boxes) in the track chassis assembly, in some embodiments, the adjustment plate is at least one subgrade box in another subgrade box group 10 of the plurality of subgrade box groups 10. In other words, subgrade boxes from other subgrade box groups can be inserted into the multiple subgrade boxes of a particular subgrade box group to adjust the shape and size of the formed bottom foundation, thereby improving component utilization rate.

[0060] exist Figure 1 and Figure 3 In the embodiment, the plurality of circular tracks 20 include four circular tracks 20. In other embodiments, the plurality of circular tracks may also include two or three circular tracks, or include more than five circular tracks.

[0061] refer to Figure 1 In some embodiments, when the rail-mounted crane is operating in a circular track configuration at the maximum tonnage among the multiple tonnages, the four circular tracks 20 are concentrically disposed on the upper surface of the first base foundation. A larger number of circular tracks can better distribute the heavy load of the rail-mounted crane, reducing the load on each circular track, thereby lowering the performance requirements of the circular tracks and, in turn, the associated cost. The load-sharing effect of a larger number of circular tracks can further reduce the local strength and stiffness requirements of the roadbed assembly, thereby reducing the manufacturing requirements and cost of the roadbed assembly.

[0062] refer to Figure 4 and Figure 5 In some embodiments, when the rail crane is in a circular rail operating condition of at least part of the tonnage other than the maximum tonnage among the multiple tonnages, any three, any two or any one of the four circular rails 20 are arranged on the upper surface of the second bottom foundation.

[0063] exist Figure 3 In the figure, the four circular tracks are circular tracks 21, 22, 23, and 24 from the inside to the outside. They can be adjusted to a three-track large crane to reduce operating costs. The track combinations can be circular tracks 21, 22, and 23, circular tracks 21, 22, and 24, circular tracks 22, 23, and 24, or circular tracks 21, 23, and 24. These track combination schemes can correspond to large rail-mounted cranes with different lifting capacities.

[0064] The circular tracks 21, 22, 23, and 24 can also be adjusted to form a dual-track medium-sized crane as needed to further reduce operating costs. The track combinations can include circular tracks 21 and 22, circular tracks 21 and 23, circular tracks 21 and 24, circular tracks 22 and 23, circular tracks 22 and 24, or circular tracks 23 and 24. These track combination solutions can correspond to rail-mounted medium-sized cranes with different lifting capacities.

[0065] The circular tracks 21, 22, 23, and 24 can also be adjusted to form a single-track small crane according to needs to further reduce operating costs. The track combination can be circular track 21, circular track 22, circular track 23, or circular track 24. These track combination solutions can correspond to rail-mounted small cranes with different lifting capacities.

[0066] According to different track combinations, different roadbed box group combination schemes can be adopted. Figure 2 In some embodiments, the plurality of roadbed box groups 10 include an inner roadbed box group 11 and an outer roadbed box group 12. In other embodiments, the plurality of roadbed box groups may also include three or four roadbed box groups, or more than five roadbed box groups.

[0067] refer to Figure 1 In some embodiments, when the rail-mounted crane is operating in a circular track at the maximum tonnage among the multiple tonnages, the inner roadbed box assembly 11 and the outer roadbed box assembly 12 are assembled to form the first bottom foundation, and the inner roadbed box assembly 11 is located inside the outer roadbed box assembly 12. Accordingly, a portion of the multiple circular tracks with a larger diameter can be arranged on the surface of the outer roadbed box assembly 12, while a portion of the multiple circular tracks with a smaller diameter can be arranged on the surface of the inner roadbed box assembly 11.

[0068] refer to Figure 4 and Figure 5 In some embodiments, when the rail-mounted crane is in a circular orbit operation condition with at least a portion of the tonnage other than the maximum tonnage among the multiple tonnages, the inner roadbed box group 11 or the outer roadbed box group 12 is assembled into the second bottom foundation. Figure 4 For circular tracks 22 and 24, an outer roadbed box assembly can be used to form the second substructure. Since the diameter of circular track 22 is relatively small, the spacing between adjacent roadbed boxes within the outer roadbed box assembly can be reduced accordingly to accommodate the circular track 22. For tracks with larger diameters, an inner roadbed box assembly can also be used to form the second substructure, with the spacing between adjacent roadbed boxes within the inner roadbed box assembly increased accordingly, or a roadbed box from the outer roadbed box assembly can be inserted as an adjustment plate. Both the inner and outer roadbed boxes can serve as adjustment plates for each other to meet various expansion requirements.

[0069] For multiple roadbed box groups, in addition to providing foundation support for circular tracks, they can also provide foundation support for other forms of tracks. Figure 7In some embodiments, the track chassis assembly further includes a linear track 90. When the rail-mounted crane is operating in a straight track condition, at least one of the plurality of roadbed boxes 10 is arranged as a third bottom foundation of the rail-mounted crane, and the linear track 90 is disposed on the upper surface of the third bottom foundation along a first direction. The first direction is the direction in which the linear track 90 extends.

[0070] The multiple roadbed boxes in the at least one roadbed box group 10 are arranged along the first direction, and the long sides and short sides of two adjacent roadbed boxes are in opposite directions and perpendicular to the first direction. Figure 7 In the figure, the roadbed box 10a with the short side on the left and the long side on the right and the roadbed box 10b with the short side on the right and the long side on the left are arranged alternately. Since the angles of the two side sides of each roadbed box relative to the long side and the short side can match the angles of the two side sides of the adjacent roadbed box relative to the short side and the long side, the foundation bearing of the straight track 90 can be achieved so that the rail crane can move linearly along the straight track 90.

[0071] The various embodiments of the track chassis assembly disclosed herein can be applied to various types of track-mounted cranes. Figure 8 The present disclosure further provides an embodiment of a rail-mounted crane. The rail-mounted crane in this embodiment comprises: any of the aforementioned rail chassis assemblies, a plurality of trolley assemblies 30, an equipment platform 40, a power drive assembly 50, and a hoisting assembly.

[0072] exist Figure 1 、 Figure 4 、 Figure 5 and Figure 8 In the embodiment, a plurality of trolley assemblies 30 are at least partially disposed on the track chassis assembly. An equipment platform 40 is connected to the plurality of trolley assemblies 30. A power drive assembly 50 is disposed on the equipment platform 40 and connected to the plurality of trolley assemblies 30, and is configured to drive the movement of each trolley assembly 30 disposed on the track chassis assembly. A hoisting assembly is disposed on the equipment platform 40 and connected to the power drive assembly 50.

[0073] refer to Figure 8, in some embodiments, the suspended weight assembly includes: a boom system 60, a counterweight system 70, and an operating system 80. The boom system 60 may include a boom having at least one standard boom section, which may be a main lifting boom, a auxiliary lifting boom, or a luffing jib, etc. The form of the boom may be an A-type or a parallel structure. For different working conditions, booms of different lengths may be used, and the length of the boom can be achieved by adjusting the number of standard boom sections. For each standard boom section, its structure and size can also be adjusted as needed. The counterweight system 70 can provide a weight to offset the suspended weight load and prevent the boom system from tipping over. The operating system 80 can provide control for operations such as the luffing of the boom system and the lifting of heavy objects.

[0074] Reference Figure 9 , in some embodiments, the standard boom section includes at least one set of load-bearing chord structure units 61 and connection joints 62. The load-bearing chord structure units 61 are truss rod structures, and one set of load-bearing chord structure units 61 may include multiple load-bearing chord structure units 61 arranged side by side. The connection joints 62 are provided at at least one end of the at least one set of load-bearing chord structure units 61 to connect each load-bearing chord structure unit 61 and to connect with adjacent standard boom sections or structural elements such as equipment platforms.

[0075] The length and cross-sectional dimensions of the standard boom section can be determined respectively by the number of sets of load-bearing chord structure units 61 included in the standard boom section and the arrangement of each set of load-bearing chord structure units 61. Different sets of load-bearing chord structure units 61 are arranged in sequence along the length direction of the standard boom section, and the load-bearing chord structure units 61 in the same set are arranged side by side in at least one direction of the cross-section perpendicular to the length direction of the standard boom section. If the standard boom section is relatively long, bracing bars can be arranged between the load-bearing chord structure units 61 for reinforcement.

[0076] In Figure 8 , when the rail-mounted crane is in the circular rail operation condition at the maximum tonnage among the multiple tonnages, each set of load-bearing chord structure units 61 includes four load-bearing chord structure units 61 arranged in a "field" shape in the cross-section perpendicular to the length direction of the standard boom section. This arrangement can enable the boom system to obtain good stiffness and load-bearing capacity.

[0077] Under the circular rail operation conditions of at least some of the other tonnages other than the maximum tonnage among the multiple tonnages of the rail-mounted crane, each set of load-bearing chord structure units 61 includes one or two load-bearing chord structure units 61 arranged in the cross-section perpendicular to the length direction of the standard boom section. By reducing the number of load-bearing chord structure units in each set of the standard boom section, the lifting weight requirements of cranes of different tonnages can be met, and multiple models of cranes can be developed from one ultra-large crane, effectively reducing the operating costs.

[0078] The plurality of trolley assemblies 30 can be divided into at least one front trolley assembly and at least one rear trolley assembly according to their setting positions. Figure 1 In the embodiment, the two trolleys on the left side of the circular track are all rear trolley assemblies, and the two trolleys on the right side are all front trolley assemblies. The front trolley assembly can be arranged on the lower side of the main arm, and the rear trolley assembly can be arranged on the lower side of the counterweight system 70.

[0079] refer to Figure 1 In some embodiments, the trolley assembly 30 includes a track wheel assembly 31, a first trolley gimbal 32, and a second trolley gimbal 33. A first connecting frame 34 may be provided between the first trolley gimbal 32 and the second trolley gimbal 33, and a second connecting frame 35 may be provided between the second trolley gimbal 33 and the equipment platform 40.

[0080] When the rail-mounted crane is operating in a circular track at the maximum tonnage among the multiple tonnages, the multiple trolley assemblies 30 are movably disposed on the multiple circular tracks 20 of the track chassis assembly. The track wheel assembly 31 in each trolley assembly 30 is connected to the first trolley gimbal 32 and is located below the first trolley gimbal 32. The second trolley gimbal 33 is connected to both first trolley gimbals 32 operating on two adjacent circular tracks 20 or two circular tracks 20 separated by at least one circular track 20, and is located above the two first trolley gimbals 32.

[0081] refer to Figure 6 In the force transmission principle shown, a load F from above acts on the second trolley balancing frame 33. The second trolley balancing frame 33 divides the load F into two equal parts, F / 2, through the two first trolley balancing frames 32 connected to it, located on two circular tracks. The first trolley balancing frames 32 then divide the load F / 2 into two equal parts, F / 4, respectively, on the two track wheel sets 31 located on the same circular track. This achieves load sharing across multiple circular tracks.

[0082] When the rail crane is in a circular rail operation condition with at least part of the tonnage other than the maximum tonnage among the multiple tonnages, a part of the trolley assemblies 30 of the multiple trolley assemblies 30 can be movably arranged on at least two circular rails 20 of the rail chassis assembly. The rail wheel assembly 31 in each of the trolley assemblies 30 is connected to the first trolley gimbal 32 and is located on the lower side of the first trolley gimbal 32. The equipment platform 40 can be directly connected to the first trolley gimbal 32. In this way, the layout of the trolley assembly can be simplified according to the working conditions, and the circular rail layout under the current working conditions can be matched, thereby improving the operating economy. In other embodiments, the equipment platform 40 can also be connected to the first trolley gimbal 32 through the second trolley gimbal 33.

[0083] Through the description of the above embodiments, the rail chassis assembly and rail-mounted crane disclosed in the present invention have at least one of the following technical effects:

[0084] The installation of circular tracks and roadbed boxes can enable larger-tonnage rail-mounted cranes to achieve better structural and ground load distribution, reduce the difficulty of foundation treatment and chassis manufacturing, and thus reduce costs.

[0085] By setting up the roadbed box group and the circular track, a variety of crane models can be developed from the complete rail-mounted crane to meet more working conditions and improve component utilization.

[0086] By using multiple roadbed box groups with different radii, the foundation laying needs under various working conditions can be met during the expansion of the entire machine, reducing the use of additional roadbed boxes;

[0087] Through the design of the load-bearing chord structural unit in the standard boom section, the boom system can meet the load-bearing requirements of larger tonnages and can be adjusted during expansion to meet the needs of more working conditions, reduce weight and improve component utilization.

[0088] Thus far, various embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0089] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A rail chassis assembly for a rail-mounted crane convertible into multiple tonnages, characterized in that: include: A plurality of roadbed box groups (10), each roadbed box group (10) comprising a plurality of roadbed boxes that can be arranged in a fan ring or a circular ring along a circumferential direction, and the radii of the fan rings or circular rings corresponding to each roadbed box group (10) are different; and A plurality of annular tracks (20), each annular track (20) being in the shape of a closed or non-closed ring; Wherein, when the rail crane is in a circular rail operation condition with a maximum tonnage among the multiple tonnages, the multiple roadbed box groups (10) are arranged to form a first bottom foundation of the rail crane, and the multiple roadbed box groups (10) are concentrically and radially arranged, and the multiple circular rails (20) are concentrically arranged on the upper surface of the first bottom foundation; When the rail crane is in a circular rail operation condition of at least a portion of the tonnages other than the maximum tonnage among the multiple tonnages, at least a portion of the roadbed box groups (10) of the multiple roadbed box groups (10) are arranged as a second bottom foundation of the rail crane, and a portion of the circular rails (20) of the multiple circular rails (20) are concentrically arranged on the upper surface of the second bottom foundation; The plurality of annular tracks (20) include four annular tracks (20), and the plurality of roadbed box groups (10) include: an inner roadbed box group (11) and an outer roadbed box group (12); Wherein, when the rail crane is in a circular rail operation condition of the maximum tonnage among the multiple tonnages, the inner roadbed box group (11) and the outer roadbed box group (12) are assembled into the first bottom foundation, and the inner roadbed box group (11) is located inside the outer roadbed box group (12), and the four circular rails (20) are concentrically arranged on the upper surface of the first bottom foundation; When the rail crane is in a circular rail operation condition at at least a portion of the tonnages other than the maximum tonnage among the multiple tonnages, the inner roadbed box group (11) or the outer roadbed box group (12) is assembled into the second bottom foundation, and any three or any two of the four circular rails (20) are arranged on the upper surface of the second bottom foundation; When the rail-mounted crane is in a circular rail operation condition at at least a portion of the tonnages other than the maximum tonnage among the multiple tonnages, an adjustment plate is provided between at least a portion of adjacent roadbed boxes in a portion of the roadbed box groups (10) of the multiple roadbed box groups (10), and the adjustment plate is at least one roadbed box in another portion of the roadbed box groups (10) of the multiple roadbed box groups (10).

2. A rail-mounted crane, characterized in that: include: The track chassis assembly according to claim 1; A plurality of trolley assemblies (30) at least partially disposed on the track chassis assembly; An equipment platform (40) connected to the plurality of trolley assemblies (30); A power drive assembly (50) is provided on the equipment platform (40) and is connected to the plurality of trolley assemblies (30), and is configured to drive the movement of each trolley assembly (30) provided on the track chassis assembly; and A lifting assembly is provided on the equipment platform (40) and is connected to the power drive assembly (50).

3. The rail-mounted crane according to claim 2, characterized in that: The trolley assembly (30) includes a track wheel set (31), a first trolley balance frame (32), and a second trolley balance frame (33). Among them, when the rail crane is in the circular rail operation condition of the maximum tonnage among the multiple tonnages, the multiple trolley assemblies (30) are movably arranged on the multiple circular rails (20) of the rail chassis assembly. The track wheel set (31) in each trolley assembly (30) is connected to the first trolley balance frame (32) and is located below the first trolley balance frame (32). The second trolley balance frame (33) is connected to the two first trolley balance frames (32) running on two adjacent circular rails (20) or two circular rails (20) separated by at least one circular rail (20), and is located above the two first trolley balance frames (32).

4. The rail-mounted crane according to claim 3, characterized in that: When the rail crane is in the circular rail operation condition of at least some tonnages other than the maximum tonnage among the multiple tonnages, a part of the trolley assemblies (30) of the multiple trolley assemblies (30) are movably arranged on at least two circular rails (20) of the rail chassis assembly. The track wheel set (31) in each trolley assembly (30) is connected to the first trolley balance frame (32) and is located below the first trolley balance frame (32). The equipment platform (40) is directly connected to the first trolley balance frame (32) or is connected to the first trolley balance frame (32) through the second trolley balance frame (33).

5. The rail-mounted crane according to claim 2, characterized in that: The lifting component includes: a boom system (60), a counterweight system (70), and an operation system (80); among them, the boom system (60) includes a boom having at least one standard boom section. The standard boom section includes at least one set of load-bearing chord structure units (61) and connection joints (62). The connection joints (62) are arranged at at least one end of the at least one set of load-bearing chord structure units (61). The length and cross-sectional dimensions of the standard boom section are determined by the number of sets of load-bearing chord structure units (61) included in the standard boom section and the arrangement mode of each set of load-bearing chord structure units (61).

6. The rail-mounted crane according to claim 5, characterized in that: When the rail crane is in the circular rail operation condition of the maximum tonnage among the multiple tonnages, each set of load-bearing chord structure units (61) includes four load-bearing chord structure units (61) arranged in a "field" shape in a cross-section perpendicular to the length direction of the standard boom section; when the rail crane is in the circular rail operation condition of at least some tonnages other than the maximum tonnage among the multiple tonnages, each set of load-bearing chord structure units (61) includes one or two load-bearing chord structure units (61) arranged in a cross-section perpendicular to the length direction of the standard boom section.

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