Crane end beam structure

Abstract

The present invention discloses a crane end beam structure, comprising a first end beam and a second end beam, a connecting beam, and a connecting assembly, wherein the connecting beam is connected between the first end beam and the second end beam via the connecting assembly. The first and second end beams are both composed of two webs and a plurality of connecting ribs; a groove is provided on the upper portion of the web, and a U-shaped groove is provided on the lower portion of the web. The main beam of the crane is installed at the bottom of the groove, and a single wheel or double wheels can be installed at the lower portion of each end beam, and the number and position of the connecting assembly to be installed are determined according to the number of wheels. The crane end beam structure of the present invention can be configured as an articulated end beam structure or a rigid end beam structure by adjusting the number of wheels installed, the number of connecting assemblies installed, and the position to adapt to different operating conditions, thereby making the crane end beam structure of the present invention universal and standardized, facilitating mass production, and reducing production costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of crane structural parts, and in particular relates to a crane end beam structure. Background Art

[0002] The crane end beam structure is an essential connecting structure for the crane bridge. The crane bridge consists of two main beams and two end beams, which are connected by the end beams to form a rectangular frame structure. Crane end beam structures can be divided into rigid and articulated structures. Existing crane end beam structures are generally box beam structures with wheel support rings welded to each end. This requires a lot of assembly and welding work, and has poor versatility. This makes it suitable only for small-batch production of single pieces, and not for standardized production or mass production. Summary of the Invention

[0003] In order to at least partially solve the technical problems existing in the above-mentioned prior art, the present invention provides a crane end beam structure, comprising an end beam, a connecting beam, and a connecting assembly, wherein the end beam comprises a first end beam and a second end beam, and the connecting beam is connected between the first end beam and the second end beam via the connecting assembly, wherein:

[0004] The first end beam is composed of two first webs and a plurality of first connecting ribs, the two first webs are symmetrically arranged, the plurality of first connecting ribs are fixed between the two first webs, the upper portions of the two first webs are provided with a first groove, the lower portions of the two first webs are symmetrically provided with a first U-shaped groove and a second U-shaped groove on both sides of the first groove, the two first webs are provided with a first bolt hole above the first U-shaped groove and the second U-shaped groove, and the ends of the two first webs connected to the connecting beam are provided with a first mounting hole and a second mounting hole;

[0005] The second end beam is composed of two second webs and a plurality of second connecting ribs, the two second webs are symmetrically arranged, the plurality of second connecting ribs are fixed between the two second webs, the upper portions of the two second webs are provided with a second groove, the lower portions of the two second webs are symmetrically provided with a third U-shaped groove and a fourth U-shaped groove on both sides of the second groove, the two second webs are provided with a second bolt hole above the third U-shaped groove and the fourth U-shaped groove, and the ends of the two second webs connected to the connecting beam are provided with a third mounting hole and a fourth mounting hole;

[0006] The connecting beam is provided with a first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole at both ends, respectively, the first connecting hole and the second connecting hole correspond to the first mounting hole and the second mounting hole respectively, and the third connecting hole and the fourth connecting hole correspond to the third mounting hole and the fourth mounting hole respectively;

[0007] Each of the connecting components includes a hinge shaft, two adjustment washers, a round nut, and a stop washer. In the connecting component connecting the first end beam and the connecting beam, the two adjustment washers are respectively installed between the connecting beam and each first web of the first end beam, the hinge shaft is inserted into the adjustment washer, the round nut is screwed at the end of the hinge shaft, and the stop washer is installed between the round nut and the first end beam; in the connecting component connecting the second end beam and the connecting beam, the two adjustment washers are respectively installed between the connecting beam and each second web of the second end beam, the hinge shaft is inserted into the adjustment washer, the round nut is screwed at the end of the hinge shaft, and the stop washer is installed between the round nut and the second end beam.

[0008] Furthermore, in the above-mentioned crane end beam structure, the main beam of the crane is installed at the bottom of the first groove of the first end beam and the bottom of the second groove of the second end beam.

[0009] Furthermore, the crane end beam structure is an articulated end beam structure, wheels are installed in the first U-shaped groove and the second U-shaped groove of the first end beam, and in the third U-shaped groove and the fourth U-shaped groove of the second end beam, and one connecting assembly is installed at a position corresponding to the first mounting hole and the first connecting hole, and at a position corresponding to the third mounting hole and the third connecting hole, respectively, wherein:

[0010] The wheel is mounted on the first U-shaped groove and the second U-shaped groove of the first end beam through a mounting bracket and bolts. The mounting bracket is embedded in the two first webs of the first end beam. The bolts are screwed into screw holes provided on the mounting bracket and first bolt holes above the first U-shaped groove and the second U-shaped groove.

[0011] The wheel is mounted to the third U-shaped groove and the fourth U-shaped groove of the second end beam through a mounting bracket and bolts. The mounting bracket is engaged with the two second webs of the second end beam. The bolts are screwed into screw holes provided on the mounting bracket and second bolt holes above the third U-shaped groove and the fourth U-shaped groove.

[0012] In the connecting assembly installed at positions corresponding to the first mounting hole and the first connecting hole, the hinge shaft is inserted into the first mounting hole, the adjusting washer, and the first connecting hole, the round nut is screwed onto the end of the hinge shaft, and the locking washer is installed between the round nut and the first end beam;

[0013] In the connecting assembly installed at the position corresponding to the third mounting hole and the third connecting hole, the hinge shaft is inserted into the third mounting hole, the adjusting washer, and the third connecting hole, the round nut is screwed on the end of the hinge shaft, and the stop washer is installed between the round nut and the second end beam.

[0014] Furthermore, the crane end beam structure is a rigid end beam structure, and wheels are installed in the first U-shaped groove of the first end beam away from the connecting beam, and in the fourth U-shaped groove of the second end beam away from the connecting beam. One connecting assembly is installed at a position corresponding to the first mounting hole and the first connecting hole, at a position corresponding to the second mounting hole and the second connecting hole, at a position corresponding to the third mounting hole and the third connecting hole, and at a position corresponding to the fourth mounting hole and the fourth connecting hole, wherein:

[0015] The wheel is mounted on the first U-shaped groove of the first end beam through a mounting bracket and bolts. The mounting bracket is embedded in the two first webs of the first end beam. The bolts are screwed into screw holes provided on the mounting bracket and first bolt holes above the first U-shaped groove.

[0016] The wheel is mounted on the fourth U-shaped groove of the second end beam through a mounting bracket and bolts, the mounting bracket is embedded in the two second webs of the second end beam, and the bolts are screwed into the screw holes provided on the mounting bracket and the second bolt holes above the fourth U-shaped groove;

[0017] In the connecting assembly installed at positions corresponding to the first mounting hole and the first connecting hole, the hinge shaft is inserted into the first mounting hole, the adjusting washer, and the first connecting hole, the round nut is screwed onto the end of the hinge shaft, and the locking washer is installed between the round nut and the first end beam;

[0018] In the connecting assembly installed at positions corresponding to the second mounting hole and the second connecting hole, the hinge shaft is inserted into the second mounting hole, the adjusting washer, and the second connecting hole, the round nut is screwed onto the end of the hinge shaft, and the locking washer is installed between the round nut and the first end beam;

[0019] In the connecting assembly installed at a position corresponding to the third mounting hole and the third connecting hole, the hinge shaft is inserted into the third mounting hole, the adjusting washer, and the third connecting hole, the round nut is screwed onto the end of the hinge shaft, and the stop washer is installed between the round nut and the second end beam;

[0020] In the connecting assembly installed at the position corresponding to the fourth mounting hole and the fourth connecting hole, the hinge shaft is inserted into the fourth mounting hole, the adjusting washer, and the fourth connecting hole, the round nut is screwed on the end of the hinge shaft, and the stop washer is installed between the round nut and the second end beam.

[0021] The crane end beam structure of the present invention has the following advantages and beneficial effects:

[0022] The crane end beam structure of the present invention can be configured as an articulated end beam structure or a rigid end beam structure by adjusting the number of wheel installations, the number of connection assembly installations, and their positions to adapt to different operating conditions. This makes the crane end beam structure of the present invention universal and standardized, facilitates mass production, and reduces production costs.

[0023] In addition, in the crane end beam structure of the present invention, the wheels are installed and disassembled through the mounting frame, bolts and U-shaped groove structure, which can quickly and conveniently realize the disassembly and assembly of the wheels without the need to weld wheel support rings, significantly reducing the workload of assembly, welding, etc.

[0024] Moreover, in the crane end beam structure of the present invention, by adjusting the thickness of the adjusting washer in the connecting assembly, the gap between the end beam and the connecting beam can be effectively controlled, thereby controlling the movement between the two end beams, ensuring the isotropic difference of the wheels installed at the lower part of the end beam, and improving the reliability of use; by adjusting the length of the connecting beam, the needs of installing cranes with different spans can be met; by installing the main beam of the crane at the bottom of the groove of the end beam, the height of the crane bridge can be effectively reduced, thereby improving practical convenience and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 It is a schematic diagram of the overall structure of the crane end beam structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the first end beam in the crane end beam structure of the present invention;

[0028] Figure 3 For the Figure 1 Partial view in the direction of A;

[0029] Figure 4 It is a structural schematic diagram of the connecting beam in the crane end beam structure of the present invention;

[0030] Figure 5It is a structural schematic diagram of the connection assembly in the crane end beam structure of the present invention;

[0031] Figure 6 A schematic diagram of an articulated end beam structure formed by the crane end beam structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the rigid end beam structure formed by the crane end beam structure of the present invention.

[0033] Description of reference numerals:

[0034] 1: end beam, 11: first end beam, 12: second end beam, 111: first web, 112: first connecting rib, 113: first groove, 114: first U-shaped groove, 115: second U-shaped groove, 116: first bolt hole, 117: first mounting hole, 118: second mounting hole;

[0035] 2: connecting beam, 21: first connecting hole, 22: second connecting hole, 23: third connecting hole, 24: fourth connecting hole;

[0036] 3: Connecting assembly, 31: Hinge shaft, 32: Adjusting washer, 33: Round nut, 34: Locking washer;

[0037] 4: wheel, 41: mounting bracket, 42: bolt;

[0038] 5: Main beam. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] like Figures 1 to 5 As shown, the crane end beam structure of the present invention includes: an end beam 1, a connecting beam 2, and multiple connecting components 3. The end beam 1 includes a first end beam 11 and a second end beam 12. The connecting beam 2 is connected between the first end beam 11 and the second end beam 12 through the connecting component 3.

[0041] The first end beam 11 and the second end beam 12 have the same structure, which will be described in detail below using the first end beam 11 as an example. The first end beam 11 is composed of two first webs 111 and a plurality of first connecting ribs 112. The two first webs 111 are symmetrically arranged, and the plurality of first connecting ribs 112 are fixed between the two first webs 111. The upper portions of the two first webs 111 are provided with a first groove 113, and the lower portions of the two first webs 111 are symmetrically provided with a first U-shaped groove 114 and a second U-shaped groove 115 on either side of the first groove 113. The two first webs 111 are provided with a first bolt hole 116 above the first U-shaped groove 114 and the second U-shaped groove 115. The ends of the two first webs 111 connected to the connecting beam 2 are provided with a first mounting hole 117 and a second mounting hole 118.

[0042] As described above, the structure of the second end beam 12 is the same as that of the first end beam 11, that is: the second end beam 12 is composed of two second webs and a number of second connecting ribs, the two second webs are symmetrically arranged, the number of second connecting ribs are fixed between the two second webs, the upper parts of the two second webs are provided with a second groove, the lower parts of the two second webs are symmetrically provided with a third U-shaped groove and a fourth U-shaped groove on both sides of the second groove, the two second webs are provided with second bolt holes above the third U-shaped groove and the fourth U-shaped groove, and the ends of the two second webs connected to the connecting beam 2 are provided with a third mounting hole and a fourth mounting hole.

[0043] A first connecting hole 21, a second connecting hole 22, a third connecting hole 23 and a fourth connecting hole 24 are respectively provided at both ends of the connecting beam 2. The first connecting hole 21 and the second connecting hole 22 correspond to the first mounting hole 117 and the second mounting hole 118 of the first end beam 11 respectively, and the third connecting hole 23 and the fourth connecting hole 24 correspond to the third mounting hole and the fourth mounting hole of the second end beam 12 respectively.

[0044] Each connection assembly 3 includes a hinge shaft 31, two adjustment washers 32, a round nut 33, and a stop washer 34. For the connection assembly 3 connecting the first end beam 11 and the connecting beam 2, two adjustment washers 32 are installed between each first web 111 of the connecting beam 2 and the first end beam 11, respectively. The hinge shaft 31 is inserted into the adjustment washer 32, the round nut 33 is screwed onto the end of the hinge shaft 31, and the stop washer 34 is installed between the round nut 33 and the first end beam 11. Similarly, for the connection assembly 3 connecting the second end beam 12 and the connecting beam 2, two adjustment washers 32 are installed between each second web of the connecting beam 2 and the second end beam 12, respectively. The hinge shaft 31 is inserted into the adjustment washer 32, the round nut 33 is screwed onto the end of the hinge shaft 31, and the stop washer 34 is installed between the round nut 33 and the second end beam 12.

[0045] Furthermore, in the crane end beam structure of the present invention as described above, it is possible to determine whether a single wheel or double wheels are installed at the lower part of each end beam according to the wheel pressure state, and to determine the installation quantity and position of the connecting assembly 3 according to the installation quantity of the wheels 4. This allows the crane end beam structure to form an articulated end beam structure and a rigid end beam structure to adapt to different operating conditions, as described in detail below.

[0046] like Figure 6 As shown, wheels 4 are installed in the first U-shaped groove 114 and the second U-shaped groove 115 of the first end beam 11, and wheels 4 are installed in the third U-shaped groove and the fourth U-shaped groove of the second end beam 12, that is, double wheels are installed at the lower part of each end beam, and then a connecting component 3 is installed at the position corresponding to the first mounting hole 117 and the first connecting hole 21 and the position corresponding to the third mounting hole and the third connecting hole 23, respectively. The connecting component 3 is not installed at the position corresponding to the second mounting hole 118 and the second connecting hole 22 and the position corresponding to the fourth mounting hole and the fourth connecting hole 24. Thus, the crane end beam structure of the present invention is formed into an articulated end beam structure. Figure 6 In the figure, the position where the connecting component 3 is installed is indicated by a solid circle, and the position where the connecting component 3 is not installed is indicated by a hollow circle.

[0047] In the above-mentioned articulated end beam structure, the wheel 4 is mounted on the first U-shaped groove 114 and the second U-shaped groove 115 of the first end beam 11 through the mounting frame 41 and the bolt 42, wherein the mounting frame 41 is embedded in the two first webs 103 of the first end beam 11, and the bolt 42 is screwed into the screw hole provided on the mounting frame 41 and the first bolt hole 116 above the first U-shaped groove 114 and the second U-shaped groove 115, thereby fixing the mounting frame 41 to the first end beam 11, thereby mounting the wheel 4 on the first U-shaped groove 114 and the second U-shaped groove 115 of the first end beam 11. Similarly, the wheel 4 is mounted to the third and fourth U-shaped grooves of the second end beam 12 via a mounting bracket 41 and bolts 42. The mounting bracket 41 is engaged with the two second webs of the second end beam 12, and the bolts 42 are screwed into screw holes provided on the mounting bracket 41 and second bolt holes above the third and fourth U-shaped grooves, thereby securing the mounting bracket 41 to the second end beam 12 and thereby mounting the wheel 4 to the third and fourth U-shaped grooves of the second end beam 12. Furthermore, when removing the wheel 4, as needed, the mounting bracket 41 can be detached from the first and second end beams 11, 12 by unscrewing the bolts 42, thereby enabling quick and convenient removal of the wheel 4.

[0048] Furthermore, in the above-described articulated end beam structure, the connecting assembly 3 connects the first end beam 11 to the connecting beam 2 via the first mounting hole 117 and the first connecting hole 21, and the connecting assembly 3 connects the second end beam 12 to the connecting beam 2 via the third mounting hole and the third connecting hole 23. Specifically, the hinge shaft 31 is inserted into the first mounting hole 117, the adjustment washer 32, and the first connecting hole 21, the round nut 33 is screwed onto the end of the hinge shaft 31, and a stop washer 34 is installed between the round nut 33 and the first end beam 11; similarly, the hinge shaft 31 is inserted into the third mounting hole, the adjustment washer 32, and the third connecting hole 23, the round nut 33 is screwed onto the end of the hinge shaft 31, and a stop washer 34 is installed between the round nut 33 and the second end beam 12.

[0049] like Figure 7 As shown, a wheel 4 is installed in the first U-shaped groove 114 of the first end beam 11 away from the connecting beam 2, and a wheel 4 is installed in the fourth U-shaped groove of the second end beam 12 away from the connecting beam 2, that is, a single wheel is installed at the lower part of each end beam, and then a connecting assembly 3 is installed at the position corresponding to the first mounting hole 117 and the first connecting hole 21, the position corresponding to the second mounting hole 118 and the second connecting hole 22, the position corresponding to the third mounting hole and the third connecting hole 23, and the position corresponding to the fourth mounting hole and the fourth connecting hole 24. Thus, the crane end beam structure of the present invention is formed into a rigid end beam structure. Figure 7 In the figure, the location for installing the connecting component 3 is indicated by a solid circle.

[0050] In the rigid end beam structure described above, the wheel 4 is mounted to the first U-shaped groove 114 of the first end beam 11 via a mounting bracket 41 and bolts 42. The mounting bracket 41 is engaged with the two first webs 103 of the first end beam 11, and the bolts 42 are screwed into screw holes provided on the mounting bracket 41 and into first bolt holes 116 above the first U-shaped groove 114, thereby securing the mounting bracket 41 to the first end beam 11, thereby securing the wheel 4 to the first U-shaped groove 114 of the first end beam 11. Similarly, the wheel 4 is mounted to the fourth U-shaped groove of the second end beam 12 via the mounting bracket 41 and bolts 42. The mounting bracket 41 is engaged with the two second webs of the second end beam 12, and the bolts 42 are screwed into screw holes provided on the mounting bracket 41 and into second bolt holes above the fourth U-shaped groove, thereby securing the mounting bracket 41 to the second end beam 12, thereby securing the wheel 4 to the fourth U-shaped groove of the second end beam 12. In addition, according to actual needs, when removing the wheel 4, the mounting bracket 41 can be separated from the first end beam 11 and the second end beam 12 by unscrewing the bolt 42, thereby quickly and conveniently removing the wheel 4.

[0051] Furthermore, in the above-mentioned rigid end beam structure, the connecting component 3 connects the first end beam 11 with the connecting beam 2 via the first mounting hole 117 and the first connecting hole 21, and the second mounting hole 118 and the second connecting hole 22, and the connecting component 3 connects the second end beam 12 with the connecting beam 2 via the third mounting hole and the third connecting hole 23, and the fourth mounting hole and the fourth connecting hole 24. Specifically, the hinge shaft 31 is inserted into the first mounting hole 117, the adjusting washer 32, and the first connecting hole 21, the round nut 33 is screwed on the end of the hinge shaft 31, and a stop washer 34 is installed between the round nut 33 and the first end beam 11; and the hinge shaft 31 is inserted into the second mounting hole 118, the adjusting washer 32, and the second connecting hole 22, the round nut 33 is screwed on the end of the hinge shaft 31, and a stop washer 34 is installed between the round nut 33 and the first end beam 11; similarly, the hinge shaft 31 is inserted into the third mounting hole, the adjusting washer 32, and the third connecting hole 23, the round nut 33 is screwed on the end of the hinge shaft 31, and a stop washer 34 is installed between the round nut 33 and the second end beam 12; and the hinge shaft 31 is inserted into the fourth mounting hole, the adjusting washer 32, and the fourth connecting hole 24, the round nut 33 is screwed on the end of the hinge shaft 31, and a stop washer 34 is installed between the round nut 33 and the second end beam 12.

[0052] In the crane end beam structure of the present invention as described above, by adjusting the thickness of the adjusting washer 32, the gap between the first end beam 11 and the connecting beam 2 and the gap between the second end beam 12 and the connecting beam 2 can be controlled, thereby controlling the movement between the two end beams and ensuring the isotropic difference of the wheel 4 installed at the lower part of the end beam.

[0053] The crane's main beam 5 is mounted at the bottom of the first groove 113 of the first end beam 11 and at the bottom of the second groove of the second end beam 12. By mounting the main beam 5 at the lowest points of the first groove 113 on the first web 111 of the first end beam 11 and the second groove on the second web of the second end beam 12, the height of the crane bridge can be effectively reduced.

[0054] In addition, in the crane end beam structure as described above, the connection beams 2 of different lengths can be selected to meet the requirements of installing crane trolleys of different spans.

[0055] Compared with the prior art, the crane end beam structure of the present invention has the following advantages and beneficial effects:

[0056] (1) By adjusting the number of wheels installed, the number of connecting components installed, and their positions, the crane end beam structure can be an articulated end beam structure or a rigid end beam structure to adapt to different working conditions. This makes the crane end beam structure of the present invention universal and standardized, facilitates mass production, and reduces production costs.

[0057] (2) The wheels are installed and disassembled through the mounting frame, bolts and U-shaped groove structure, which can quickly and easily realize the disassembly and assembly of the wheels without the need to weld the wheel support ring, significantly reducing the workload of assembly and welding.

[0058] (3) By adjusting the thickness of the adjusting washer in the connecting assembly, the gap between the end beam and the connecting beam can be effectively controlled, thereby controlling the movement between the two end beams, ensuring the isocentering of the wheels installed at the bottom of the end beam, and improving the reliability of use.

[0059] (4) By adjusting the length of the connecting beam, the needs of installing lifting equipment with different spans can be met.

[0060] (5) The end beam adopts a concave structure, and the main beam of the crane is installed at the bottom of the groove of the end beam, which can effectively reduce the height of the crane bridge and improve practical convenience and safety.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this document are all referenced to the placement states shown in the accompanying drawings.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A crane end beam structure, characterized in that: The crane end beam structure includes an end beam, a connecting beam, and a plurality of connecting assemblies. The end beam includes a first end beam and a second end beam. The connecting beam is connected between the first end beam and the second end beam through the connecting assembly, wherein: The first end beam is composed of two first webs and a plurality of first connecting ribs, the two first webs are symmetrically arranged, the plurality of first connecting ribs are fixed between the two first webs, the upper portions of the two first webs are provided with a first groove, the lower portions of the two first webs are symmetrically provided with a first U-shaped groove and a second U-shaped groove on both sides of the first groove, the two first webs are provided with a first bolt hole above the first U-shaped groove and the second U-shaped groove, and the ends of the two first webs connected to the connecting beam are provided with a first mounting hole and a second mounting hole; The second end beam is composed of two second webs and a plurality of second connecting ribs, the two second webs are symmetrically arranged, the plurality of second connecting ribs are fixed between the two second webs, the upper portions of the two second webs are provided with a second groove, the lower portions of the two second webs are symmetrically provided with a third U-shaped groove and a fourth U-shaped groove on both sides of the second groove, the two second webs are provided with a second bolt hole above the third U-shaped groove and the fourth U-shaped groove, and the ends of the two second webs connected to the connecting beam are provided with a third mounting hole and a fourth mounting hole; The connecting beam is provided with a first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole at both ends, respectively, the first connecting hole and the second connecting hole correspond to the first mounting hole and the second mounting hole respectively, and the third connecting hole and the fourth connecting hole correspond to the third mounting hole and the fourth mounting hole respectively; Each of the connecting components comprises a hinge shaft, two adjusting washers, a round nut, and a stop washer. In the connecting component connecting the first end beam and the connecting beam, the two adjusting washers are respectively installed between the connecting beam and each first web of the first end beam, the hinge shaft is inserted into the adjusting washer, the round nut is screwed on the end of the hinge shaft, and the stop washer is installed between the round nut and the first end beam; in the connecting component connecting the second end beam and the connecting beam, the two adjusting washers are respectively installed between the connecting beam and each second web of the second end beam, the hinge shaft is inserted into the adjusting washer, the round nut is screwed on the end of the hinge shaft, and the stop washer is installed between the round nut and the second end beam; By adjusting the thickness of the adjusting washer, the gap between the first end beam and the connecting beam and between the second end beam and the connecting beam can be controlled; The main beam of the crane is installed at the bottom of the first groove of the first end beam and the bottom of the second groove of the second end beam; The installation of a single wheel or double wheels at the bottom of each end beam can be determined according to the wheel pressure status, and the number and position of the connection components can be determined according to the number of wheels installed. This allows the crane end beam structure to form an articulated end beam structure or a rigid end beam structure to adapt to different operating conditions; When the crane end beam structure is an articulated end beam structure, wheels are installed in the first U-shaped groove and the second U-shaped groove of the first end beam, and in the third U-shaped groove and the fourth U-shaped groove of the second end beam, and one connecting assembly is installed at a position corresponding to the first mounting hole and the first connecting hole, and at a position corresponding to the third mounting hole and the third connecting hole, respectively, wherein: The wheel is mounted on the first U-shaped groove and the second U-shaped groove of the first end beam through a mounting bracket and bolts. The mounting bracket is embedded in the two first webs of the first end beam. The bolts are screwed into screw holes provided on the mounting bracket and first bolt holes above the first U-shaped groove and the second U-shaped groove. The wheel is mounted to the third U-shaped groove and the fourth U-shaped groove of the second end beam through a mounting bracket and bolts. The mounting bracket is engaged with the two second webs of the second end beam. The bolts are screwed into screw holes provided on the mounting bracket and second bolt holes above the third U-shaped groove and the fourth U-shaped groove. In the connecting assembly installed at positions corresponding to the first mounting hole and the first connecting hole, the hinge shaft is inserted into the first mounting hole, the adjusting washer, and the first connecting hole, the round nut is screwed onto the end of the hinge shaft, and the locking washer is installed between the round nut and the first end beam; In the connecting assembly installed at a position corresponding to the third mounting hole and the third connecting hole, the hinge shaft is inserted into the third mounting hole, the adjusting washer, and the third connecting hole, the round nut is screwed onto the end of the hinge shaft, and the stop washer is installed between the round nut and the second end beam; When the crane end beam structure is a rigid end beam structure, a wheel is installed in the first U-shaped groove of the first end beam away from the connecting beam, and in the fourth U-shaped groove of the second end beam away from the connecting beam. One connecting assembly is installed at a position corresponding to the first mounting hole and the first connecting hole, at a position corresponding to the second mounting hole and the second connecting hole, at a position corresponding to the third mounting hole and the third connecting hole, and at a position corresponding to the fourth mounting hole and the fourth connecting hole, wherein: The wheel is mounted on the first U-shaped groove of the first end beam through a mounting bracket and bolts. The mounting bracket is embedded in the two first webs of the first end beam. The bolts are screwed into screw holes provided on the mounting bracket and first bolt holes above the first U-shaped groove. The wheel is mounted on the fourth U-shaped groove of the second end beam through a mounting bracket and bolts, the mounting bracket is embedded in the two second webs of the second end beam, and the bolts are screwed into the screw holes provided on the mounting bracket and the second bolt holes above the fourth U-shaped groove; In the connecting assembly installed at positions corresponding to the first mounting hole and the first connecting hole, the hinge shaft is inserted into the first mounting hole, the adjusting washer, and the first connecting hole, the round nut is screwed onto the end of the hinge shaft, and the locking washer is installed between the round nut and the first end beam; In the connecting assembly installed at positions corresponding to the second mounting hole and the second connecting hole, the hinge shaft is inserted into the second mounting hole, the adjusting washer, and the second connecting hole, the round nut is screwed onto the end of the hinge shaft, and the locking washer is installed between the round nut and the first end beam; In the connecting assembly installed at a position corresponding to the third mounting hole and the third connecting hole, the hinge shaft is inserted into the third mounting hole, the adjusting washer, and the third connecting hole, the round nut is screwed onto the end of the hinge shaft, and the stop washer is installed between the round nut and the second end beam; In the connecting assembly installed at the position corresponding to the fourth mounting hole and the fourth connecting hole, the hinge shaft is inserted into the fourth mounting hole, the adjusting washer, and the fourth connecting hole, the round nut is screwed on the end of the hinge shaft, and the stop washer is installed between the round nut and the second end beam.

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