Turning track structure of tower crane and mobile tower crane system

Abstract

The invention discloses a tower crane steering track structure and a movable tower crane system, and relates to the technical field of movable tower cranes. The tower crane steering track structure comprises a mounting base frame, the two sections of first rails are arranged in parallel, and the first rails are fixedly connected with the mounting base frame; wherein the first track extends along the first walking direction; the two sections of second rails are arranged in parallel, and the second rails are fixedly connected with the mounting base frame; wherein the second track extends along the second walking direction; the at least two sections of connecting rails are detachably connected with the mounting base frame; the connecting rail is installed in the extending direction of the end of the first rail or the end of the second rail, and the connecting rail is used for connecting the first rail or the second rail with an external straight rail. According to the technical scheme provided by the invention, rapid steering of the mobile tower crane can be realized, so that the operation efficiency of the mobile tower crane is improved.

Description

Technical Field

[0001] This invention relates to the field of mobile tower crane technology, and in particular to a tower crane steering track structure and a mobile tower crane system. Background Technology

[0002] Mobile tower cranes are tower lifting equipment with mobility. Among them, mobile tower cranes that use a track structure as a moving carrier can travel on the track structure under load, which effectively improves the efficiency of operation and has high stability. They are widely used in construction sites and other engineering projects.

[0003] In the existing technology, when a mobile tower crane needs to turn and travel, it is first lifted by the self-lifting device of the mobile tower crane so that the traveling wheels of its traveling device are disengaged from the track structure; then the track structure is turned, and then the traveling device of the mobile tower crane is rotated to a position above the track structure after the turn, so that when the self-lifting device drives the mobile tower crane to descend, its traveling wheels can be smoothly connected to the track structure after the turn.

[0004] During the aforementioned track structure turning process, due to the large size and heavy weight of the track structure, there are two main traditional technical solutions: one is to use traditional methods such as large lifting machinery to suspend and turn the track structure, which is costly and inefficient; the other is to use jacks to lift the track structure and place a rolling trolley underneath it, then manually rotate the rolling trolley to turn the track structure. This solution is limited by complex ground conditions, as uneven ground makes it difficult for the rolling trolley to rotate. At the same time, both of these track-changing and turning solutions will adversely affect the overall working efficiency of the mobile tower crane.

[0005] It should be noted that the above content is only used to help understand the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0006] The main objective of this invention is to propose a tower crane steering track structure and a mobile tower crane system, which aims to enable rapid steering of mobile tower cranes and improve their operational efficiency.

[0007] To achieve the above objectives, this invention proposes a tower crane steering track structure for use in mobile tower cranes; the tower crane steering track structure is disposed at the intersection of the first and second traveling directions of the mobile tower crane; specifically, the tower crane steering track structure includes: The mounting base frame is an equilateral quadrilateral frame structure. Two parallel first tracks are provided, with each first track fixedly installed on one of the symmetrical sides of the mounting base; wherein the first track extends along the first traveling direction. Two parallel second tracks are fixedly installed on the other symmetrical side of the mounting base; wherein the second tracks extend along the second traveling direction; At least two connecting rails are provided, and the connecting rails are detachably connected to the mounting base; the connecting rails are installed at the end extension direction of the first rail or the second rail, and the connecting rails are located at the intersection of the first travel direction and the second travel direction; the connecting rails are used to connect the first rail or the second rail to an external straight rail.

[0008] In one embodiment, the first walking direction and the second walking direction are set at right angles to each other; the mounting base has a square frame structure, and each corner of the mounting base is provided with an extension section extending along the first walking direction and the second walking direction, and the connecting rail is installed on the extension section.

[0009] In one embodiment, the mounting base includes: Two parallel first mounting beams extend along the first traveling direction; the first track is installed at the middle of the first mounting beams. Two parallel second mounting beams extend along the second traveling direction and are installed in the gap between the two first mounting beams; the second track is installed at the middle position of the second mounting beams. Two parallel third mounting beams extend along the second travel direction; the third mounting beam is located on the side of one of the first mounting beams away from the second mounting beam, and the third mounting beam is located in the length extension direction of the second mounting beam. Two parallel fourth mounting beams extend along the second traveling direction; the fourth mounting beam is located on the side of another first mounting beam away from the second mounting beam, and the fourth mounting beam is located in the length extension direction of the second mounting beam.

[0010] In one embodiment, the first mounting beam, the second mounting beam, the third mounting beam, and the fourth mounting beam are configured as I-shaped steel structures, and a plurality of reinforcing ribs are provided in the middle of the first mounting beam, the second mounting beam, the third mounting beam, and the fourth mounting beam.

[0011] In one embodiment, the mounting base is equipped with a plurality of symmetrically arranged rail clamping devices, which are used to connect the first rail, the second rail, and the connecting rail to the mounting base.

[0012] In one embodiment, the rail clamping device includes a base and a clamping block. The base is fixedly connected to the mounting base. A limiting block is fixedly connected inside the base. The clamping block is provided with a slotted hole. The rail clamping device also includes a fixing bolt. One end of the fixing bolt passes through the slotted hole and extends into the interior of the base and is fixedly connected to the limiting block. The other end of the fixing bolt is threaded with a fixing nut. The clamping block can move closer to or further away from the first rail, the second rail, or the connecting rail along the groove direction of the slotted hole.

[0013] In one embodiment, the clamping block has a concave structure on the side facing the first track, the second track, or the connecting track. The inner top surface of the concave structure is used to press the top edge of the first track, the second track, or the connecting track downwards, and the inner side surface of the concave structure is used to squeeze the edge side of the first track, the second track, or the connecting track towards its center.

[0014] In one embodiment, the tower crane steering track structure further includes a jacking support structure, which is installed on the inner frame of the mounting base; the jacking support structure is used to connect with the self-jacking device of the mobile tower crane.

[0015] In one embodiment, the lifting support structure includes: two parallel first support beams, with both ends of the first support beams connected to the mounting base; two parallel second support beams, with the two second support beams installed in the gap area between the two first support beams; and the second support beams are provided with mounting bolts, which are used to fix them to the self-lifting device.

[0016] In one embodiment, the connecting ends of the first track / second track and the connecting track are respectively provided with a protrusion and a recess, and the protrusion and the recess are fitted together; and / or, the connecting ends of the first track / second track and the connecting track are respectively provided with a first magnetic element and a second magnetic element, and the first magnetic element and the second magnetic element are magnetically connected.

[0017] To achieve the above objectives, the present invention proposes a mobile tower crane system, which includes a mobile tower crane and a tower crane steering track structure as described in any of the above claims.

[0018] The technical solution of this invention involves installing a first track extending along a first traveling direction and a second track extending along a second traveling direction on an equilateral quadrilateral frame-like mounting base. In this way, when the mobile tower crane performs a turning operation, it is first moved to the center position of the frame, positioning its rotation axis at the intersection of the diagonals of the mounting base. Then, its built-in self-lifting device is used to lift it, subsequently driving its traveling device to rotate from above the first track to above the second track. It is understood that due to the installation... The base frame has an equilateral quadrilateral structure. The intersection of the diagonals of the base frame is also the center of the inscribed circle. This means that the distance between the rotation axis of the mobile tower crane and each side is equal, ensuring that the traveling device of the mobile tower crane can rotate and transfer between the first and second tracks. Finally, the self-lifting device drives the mobile tower crane to descend, thus completing the turning operation of the mobile tower crane. The above process does not require suspension turning of the track structure or auxiliary turning by a rolling trolley, making the turning of the mobile tower crane faster and more convenient, which helps to improve the operating efficiency of the mobile tower crane.

[0019] Meanwhile, the connecting rails adopt a detachable design. Before turning, the connecting rails are installed between the upper straight track and the first track, so that the mobile tower crane can move smoothly along it to the first track. After turning, the connecting rails are installed between the second track and the lower straight track, so that the mobile tower crane can move smoothly along it to the lower straight track. Furthermore, because the connecting rails are located at the intersection of the first and second travel directions, when the mobile tower crane moves from the upper straight track through the extension direction of the second track to the first track, the connecting rail located in the extension direction of the second track is disassembled. Similarly, when the mobile tower crane moves from the second track through the extension direction of the first track to the lower straight track, the connecting rail located in the extension direction of the first track is disassembled. This avoids the situation where the mobile tower crane cannot move along the track due to interference between the tracks. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of one embodiment of the mobile tower crane system provided by the present invention; Figure 2 A second schematic diagram of the structure of an embodiment of the mobile tower crane system provided by the present invention; Figure 3 A schematic diagram of one embodiment of the tower crane steering track structure provided by the present invention; Figure 4 A second schematic diagram of an embodiment of the tower crane steering track structure provided by the present invention; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 A schematic diagram of the rail clamping device in one embodiment of the tower crane steering rail structure provided by the present invention; Figure 7 An exploded view of the rail clamping device in one embodiment of the tower crane steering track structure provided by the present invention; Figure 8 This is a schematic diagram of the internal structure of the rail clamping device in one embodiment of the tower crane steering track structure provided by the present invention.

[0022] Explanation of reference numerals in the attached figures: 100. Mobile tower crane; 110. Self-lifting device; 120. Traveling device; 200. Mounting frame; 210. First mounting beam; 220. Second mounting beam; 230. Third mounting beam; 240. Fourth mounting beam; 300. First track; 400. Second track; 500. Connecting track; 600. Rail clamping device; 610. Base; 620. Clamping block; 621. Slotted hole; 622. Concave structure; 6221. Inner top surface; 6222. Inner side surface; 630. Limiting block; 640. Fixing bolt; 650. Fixing nut; 700. Lifting support structure; 710. First support beam; 720. Second support beam; 730. Mounting bolt; 800. Straight track; 900. Tower crane turning track structure; The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a portion of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, it should be noted that the descriptions involving "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0026] In the existing technology, when a mobile tower crane needs to turn and travel, it is first lifted by the self-lifting device of the mobile tower crane so that the traveling wheels of its traveling device are disengaged from the track structure; then the track structure is turned, and then the traveling device of the mobile tower crane is rotated to a position above the track structure after the turn, so that when the self-lifting device drives the mobile tower crane to descend, its traveling wheels can be smoothly connected to the track structure after the turn.

[0027] During the aforementioned track structure turning process, due to the large size and heavy weight of the track structure, there are two main traditional technical solutions: one is to use traditional methods such as large lifting machinery to suspend and turn the track structure, which is costly and inefficient; the other is to use jacks to lift the track structure and place a rolling trolley underneath it, then manually rotate the rolling trolley to turn the track structure. This solution is limited by complex ground conditions, as uneven ground makes it difficult for the rolling trolley to rotate. At the same time, both of these track-changing and turning solutions will adversely affect the overall working efficiency of the mobile tower crane.

[0028] To address the aforementioned technical problems, this invention proposes a tower crane steering track structure.

[0029] See also Figures 1 to 5 In one embodiment of the present invention, the tower crane steering track structure 900 is applied to a mobile tower crane 100; the tower crane steering track structure 900 is disposed at the intersection of the first traveling direction and the second traveling direction of the mobile tower crane 100; specifically, the tower crane steering track structure 900 includes: The mounting base 200 has an equilateral quadrilateral frame structure. Two parallel sections of the first track 300 are fixedly installed on one of the symmetrical sides of the mounting base 200; wherein the first track 300 extends along the first travel direction; Two parallel sections of second track 400 are fixedly installed on the other symmetrical side of the mounting base 200; wherein the second track 400 extends along the second travel direction; At least two connecting rails 500 are provided, and the connecting rails 500 are detachably connected to the mounting base 200. The connecting rails 500 are installed at the end extension direction of the first rail 300 or the second rail 400, and the connecting rails 500 are located at the intersection of the first travel direction and the second travel direction. The connecting rails 500 are used to connect the first rail 300 or the second rail 400 to the external straight rail 800.

[0030] The technical solution of this invention involves installing a first track 300 extending along a first traveling direction and a second track 400 extending along a second traveling direction on an equilateral quadrilateral frame-like mounting base 200. In this way, when the mobile tower crane 100 performs a turning operation, it is first moved to the center position of the frame of the mounting base 200, so that its rotation axis is at the intersection of the diagonals of the mounting base 200. Then, its built-in self-lifting device 110 lifts it, and subsequently, its traveling device 120 is driven to rotate from above the first track 300 to above the second track 400. It is understood that, due to the mounting base... The base frame 200 has an equilateral quadrilateral structure. At this time, the intersection of the diagonals of the base frame 200 is also the center of the inscribed circle. That is to say, the distance between the rotation axis of the mobile tower crane 100 and each side is equal, thereby ensuring that the traveling device 120 of the mobile tower crane 100 can rotate and transfer between the first track 300 and the second track 400. Finally, the self-lifting device 110 drives the mobile tower crane 100 to descend, thus completing the turning operation of the mobile tower crane 100. The above process does not require suspension turning of the track structure or rolling trolley to assist in turning, making the turning of the mobile tower crane 100 faster and more convenient, which is conducive to improving the working efficiency of the mobile tower crane 100.

[0031] Meanwhile, the connecting track 500 adopts a detachable design; before turning operations, as shown in the attached... Figure 3 As shown, the connecting rail 500 is installed between the upper straight rail 800 and the first rail 300 so that the mobile tower crane 100 can move smoothly along it to the first rail 300; after the turning is completed, as shown in the attached diagram. Figure 4As shown, the connecting rail 500 is installed between the second rail 400 and the next straight track 800 so that the mobile tower crane 100 can move smoothly along it to the next straight track 800. Furthermore, since the connecting rail 500 is located at the intersection of the first and second travel directions, when the mobile tower crane 100 moves from the upper straight track 800 through the extension direction of the second rail 400 to the first rail 300, the connecting rail 500 located in the extension direction of the second rail 400 is disassembled. Similarly, when the mobile tower crane 100 moves from the second rail 400 through the extension direction of the first rail 300 to the next straight track 800, the connecting rail 500 located in the extension direction of the first rail 300 is disassembled. This avoids the situation where the mobile tower crane 100 cannot move along the rails due to interference between the rails.

[0032] In this embodiment, the first travel direction and the second travel direction are perpendicular to each other; the mounting base 200 has a square frame structure, and extension sections extending along both the first and second travel directions are provided at the corners of the mounting base 200, with the connecting rail 500 installed on the extension sections. This configuration, with the first and second travel directions being perpendicular to each other, corresponds to the mounting base 200 being a square frame structure. Simultaneously, the design of the extension sections makes it easier for the first rail 300 and the second rail 400 to connect to the external straight rail 800, ensuring that the mobile tower crane 100 can smoothly move from the external straight rail 800 to the first rail 300 or the second rail 400.

[0033] There are many specific structures for the mounting base 200. In this embodiment, the mounting base 200 includes: two parallel first mounting beams 210 extending along a first traveling direction; a first track 300 installed at the middle of the first mounting beams 210; two parallel second mounting beams 220 extending along a second traveling direction, with the two second mounting beams 220 installed in the gap area between the two first mounting beams 210; and a second track 400 installed at the middle of the second mounting beams 220. Two parallel third mounting beams 230 extend along the second travel direction. The third mounting beam 230 is located on the side of one of the first mounting beams 210 away from the second mounting beam 220, and is situated along the length extension direction of the second mounting beam 220. Two parallel fourth mounting beams 240 extend along the second travel direction. The fourth mounting beam 240 is located on the side of another first mounting beam 210 away from the second mounting beam 220, and is situated along the length extension direction of the second mounting beam 220. Understandably, the end section of the first mounting beam 210, the third mounting beam 230, and the fourth mounting beam 240 form an extension of the mounting base 200. This arrangement, by combining multiple mounting beams to form a frame structure mounting base 200, not only withstands larger loads but also effectively disperses stress, improving the overall stability of the track structure.

[0034] Furthermore, the first mounting beam 210, the second mounting beam 220, the third mounting beam 230, and the fourth mounting beam 240 are configured as I-beam steel structures, with several reinforcing ribs provided in the middle of each beam. This configuration effectively strengthens the overall strength of the first mounting beam 210, the second mounting beam 220, the third mounting beam 230, and the fourth mounting beam 240, ensuring that the mounting base 200 is not easily deformed or damaged.

[0035] As a preferred embodiment of the above embodiments, refer to Figures 3 to 5 The mounting base 200 is equipped with several symmetrically arranged rail clamping devices 600, which are used to connect the first rail 300, the second rail 400, and the connecting rail 500 to the mounting base 200. This arrangement ensures that the first rail 300, the second rail 400, and the connecting rail 500 are securely connected to the mounting base 200, preventing the rails from loosening or shifting due to vibration or external forces during use, thus improving the reliability of the rail connection.

[0036] Specifically, refer to Figures 6 to 8The rail clamping device 600 includes a base 610 and a clamping block 620. The base 610 is fixedly connected to the mounting base 200. A limit block 630 is fixedly connected inside the base 610. The clamping block 620 is provided with a slotted hole 621. The rail clamping device 600 also includes a fixing bolt 640. One end of the fixing bolt 640 passes through the slotted hole 621 and extends into the base 610 and is fixedly connected to the limit block 630. The other end of the fixing bolt 640 is threadedly connected to a fixing nut 650. The clamping block 620 can move closer to or further away from the first rail 300, the second rail 400, or the connecting rail 500 along the groove direction of the slotted hole 621. Understandably, when the connecting rail 500 is disassembled, the clamping block 620 is moved away from the rail along the groove direction of the slotted hole 621; when the connecting rail 500 is installed, the clamping block 620 is moved closer to the rail along the groove direction of the slotted hole 621. The symmetrically arranged clamping blocks 620 are used to clamp and fix the connecting rail 500. Then, the fixing nut 650 and the fixing bolt 640 are tightened together to ensure the position of the clamping block 620 is fixed. The structure is simple and highly practical. One end of the fixing bolt 640 is fixedly connected to the limiting block 630, thereby ensuring that the fixing bolt 640 always maintains its connection with the base 610 and preventing the fixing bolt 640 from being lost.

[0037] Furthermore, the clamping block 620 has a concave structure 622 on the side facing the first track 300, the second track 400, or the connecting track 500. The inner top surface 6221 of the concave structure 622 is used to press the top edge of the first track 300, the second track 400, or the connecting track 500 downwards, and the inner side surface 6222 of the concave structure 622 is used to press the side edge of the first track 300, the second track 400, or the connecting track 500 towards its center. This design allows the concave structure 622 on the clamping block 620 to better conform to the edge shape of the track. The design of the inner top surface 6221 and the inner side surface 6222 of the concave structure 622 can simultaneously apply clamping force to the top and sides of the track, ensuring the stability of the track in all directions and further improving the clamping accuracy of the track. Understandably, since the inner side 6222 is used to press the edge of the track towards its center, the symmetrically arranged rail clamping devices 600, in combination, can achieve left and right clamping and fixing of the track.

[0038] As a preferred embodiment of the above embodiments, refer to Figures 3 to 4The tower crane steering track structure also includes a jacking support structure 700, which is installed on the inner frame of the mounting base 200. The jacking support structure 700 is used to connect with the self-jacking device 110 of the mobile tower crane 100. This configuration provides stable support for the self-jacking device 110 of the mobile tower crane 100, ensuring that the mobile tower crane 100 does not sway or tilt during jacking, thus improving the jacking stability of the mobile tower crane 100. Furthermore, the jacking support structure 700 is installed on the inner frame of the mounting base 200, which better disperses the jacking force and avoids local stress concentration, further enhancing the stability of the jacking support structure 700.

[0039] Specifically, the lifting support structure 700 includes: two parallel first support beams 710, with both ends of the first support beams 710 connected to the mounting base 200; two parallel second support beams 720, installed in the gap between the two first support beams 710; and mounting bolts 730 on the second support beams for fixed connection with the self-lifting device 110. This configuration, where the first support beams 710 and the second support beams 720 form a frame structure, allows the lifting support structure 700 to better withstand lifting forces and improve its stability. Simultaneously, the cross arrangement of the first support beams 710 and the second support beams 720 effectively disperses stress, avoiding localized stress concentration, further enhancing the strength and stability of the lifting support structure 700. In addition, the design of the mounting bolts 730 enables the jacking support structure 700 to be firmly connected to the self-jacking device 110, so that the track structure and the mobile tower crane 100 are combined into an integrated structure, ensuring a reliable connection between the two and avoiding the problem of loosening or falling off during the jacking process.

[0040] As a preferred embodiment of the above, the connecting ends of the first track 300 / second track 400 and the connecting track 500 are respectively provided with a protrusion (not shown in the figure) and a recess (not shown in the figure), and the protrusion and the recess are fitted together; and / or, the connecting ends of the first track 300 / second track 400 and the connecting track 500 are respectively provided with a first magnetic element (not shown in the figure) and a second magnetic element (not shown in the figure), and the first magnetic element and the second magnetic element are magnetically attracted together. This arrangement ensures, on the one hand, that the fitted connection of the protrusion and the recess ensures a more accurate connection between the tracks, preventing the tracks from loosening or shifting due to vibration or external force during use, thus improving the reliability of the track connection; on the other hand, the magnetic attraction between the first magnetic element and the second magnetic element ensures a tight connection between the tracks, preventing excessive gaps between them. The combination of these two measures ensures that the mobile tower crane 100 can move smoothly between the first track 300 / second track 400 and the connecting track 500.

[0041] In one embodiment, the first track 300 / second track 400 are provided with a protrusion and a first magnetic element, and the connecting track 500 is provided with a recess and a second magnetic element.

[0042] This invention also discloses a mobile tower crane system, including the tower crane steering track structure of any of the above embodiments. The specific structure of the tower crane steering track structure can be referred to the above embodiments. Since this mobile tower crane system adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0043] It should be noted that the tower crane steering track structure and other contents of the mobile tower crane system disclosed in this invention are existing technologies and will not be described in detail here.

[0044] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. Any application of the present invention directly or indirectly in other related technical fields is included within the patent protection scope of the present invention.

Claims

1. A tower crane steering track structure, applied to a mobile tower crane; characterized in that, The tower crane steering track structure is located at the intersection of the first and second traveling directions of the mobile tower crane; specifically, the tower crane steering track structure includes: The mounting base frame is an equilateral quadrilateral frame structure. Two parallel first tracks are provided, with each first track fixedly installed on one of the symmetrical sides of the mounting base; wherein the first track extends along the first traveling direction. Two parallel second tracks are fixedly installed on the other symmetrical side of the mounting base; wherein the second tracks extend along the second traveling direction; At least two connecting rails are provided, and the connecting rails are detachably connected to the mounting base; the connecting rails are installed at the end extension direction of the first rail or the second rail, and the connecting rails are located at the intersection of the first travel direction and the second travel direction; the connecting rails are used to connect the first rail or the second rail to an external straight rail.

2. The tower crane steering track structure as described in claim 1, characterized in that: The first walking direction and the second walking direction are set at right angles to each other; the mounting base has a square frame structure, and each corner of the mounting base is provided with an extension section extending along the first walking direction and the second walking direction, and the connecting rail is installed on the extension section.

3. The tower crane steering track structure as described in claim 2, characterized in that: The mounting base includes: Two parallel first mounting beams extend along the first traveling direction; the first track is installed at the middle of the first mounting beams. Two parallel second mounting beams extend along the second traveling direction and are installed in the gap between the two first mounting beams; the second track is installed at the middle position of the second mounting beams. Two parallel third mounting beams extend along the second travel direction; the third mounting beam is located on the side of one of the first mounting beams away from the second mounting beam, and the third mounting beam is located in the length extension direction of the second mounting beam. Two parallel fourth mounting beams extend along the second traveling direction; the fourth mounting beam is located on the side of another first mounting beam away from the second mounting beam, and the fourth mounting beam is located in the length extension direction of the second mounting beam.

4. The tower crane steering track structure as described in claim 1, characterized in that: The mounting base is equipped with several symmetrically arranged rail clamping devices, which are used to connect the first rail, the second rail, and the connecting rail to the mounting base.

5. The tower crane steering track structure as described in claim 4, characterized in that: The rail clamping device includes a base and a clamping block. The base is fixedly connected to the mounting base. A limiting block is fixedly connected inside the base. The clamping block is provided with a slotted hole. The rail clamping device also includes a fixing bolt. One end of the fixing bolt passes through the slotted hole and extends into the interior of the base and is fixedly connected to the limiting block. The other end of the fixing bolt is threaded with a fixing nut. The clamping block can move closer to or further away from the first rail, the second rail, or the connecting rail along the groove direction of the slotted hole.

6. The tower crane steering track structure as described in claim 5, characterized in that: The clamping block has a concave structure on the side facing the first track, the second track, or the connecting track. The inner top surface of the concave structure is used to press the top edge of the first track, the second track, or the connecting track downwards, and the inner side surface of the concave structure is used to squeeze the edge side of the first track, the second track, or the connecting track towards its center.

7. The tower crane steering track structure as described in claim 2, characterized in that: The tower crane steering track structure also includes a jacking support structure, which is installed on the inner frame of the mounting base; the jacking support structure is used to connect with the self-jacking device of the mobile tower crane.

8. The tower crane steering track structure as described in claim 7, characterized in that: The lifting support structure includes: Two parallel first support beams are provided, with both ends of the first support beams connected to the mounting base. Two parallel second support beams are installed in the gap between the two first support beams; and the second support beams are provided with mounting bolts for fixed connection with the self-lifting device.

9. The tower crane steering track structure as described in claim 1, characterized in that: The first track / second track and the connecting track are respectively provided with a protrusion and a recess at their connecting ends, and the protrusion and the recess are fitted together. And / or, the connecting ends of the first track / second track and the connecting track are respectively provided with a first magnetic element and a second magnetic element, and the first magnetic element and the second magnetic element are magnetically connected.

10. A mobile tower crane system, characterized in that: The mobile tower crane system includes a mobile tower crane and a tower crane steering track structure as described in any one of claims 1 to 9.

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