Three-point support bridge of crane and its manufacturing method

Abstract

The present invention discloses a three - support bridge for a crane and its manufacturing method. The three - support bridge for a crane includes two main girders, a left end girder, a right end girder, an intermediate girder and a platform. The two main girders are symmetrically arranged. The left end girder is arranged at the left end of the main girders, the right end girder is arranged at the right end of the main girders, the intermediate girder is arranged between the two main girders and between the left end girder and the right end girder, and the platform is arranged in the area enclosed by the two main girders, the intermediate girder and the right end girder. The main girders, beam bodies, upper end girders, lower end girders and intermediate girders are manufactured according to the stress conditions and functional requirements; the two main girders, beam bodies, upper end girders and lower end girders are formed into an isosceles trapezoid; the first installation support ring and the second installation support ring are processed, and the intermediate girder and the platform are welded. The present invention adopts a rigid connection, reduces the factors of bridge rail gnawing, improves the torsional stiffness, reduces the width of the crane, and ensures the parallelism of the wheel axes.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge girders, and particularly relates to a three - support bridge girder for a crane and a manufacturing method thereof. Background Art

[0002] The bridge girder is the main load - bearing component of a crane. Except for single - girder cranes, it is currently of a rectangular structure. When the width of one end beam of the crane is limited and it is required that the limit at the end of the workshop is small, the rectangular bridge - girder structure is almost impossible to achieve. Moreover, the rectangular bridge girder is mostly supported at four or more points, and due to reasons such as rigid connection of end beams, jamming of hinge shafts, and unequal tracks, wheel slipping or suspension may occur, resulting in the crane gnawing the rail. There is no intermediate beam connection between the two main girders of the rectangular bridge girder, and its accessory platform is outside the main girders, which will make the overall width of the crane larger. Summary of the Invention

[0003] To at least partially solve the technical problems existing in the above - mentioned prior art, the invention provides a three - support bridge girder for a crane and a manufacturing method thereof.

[0004] The three - support bridge girder for a crane of the invention comprises two main girders, a left end beam, a right end beam, an intermediate beam and a platform, wherein: the two main girders are symmetrically arranged, the left end beam is arranged at the left end of the main girders, the right end beam is arranged at the right end of the main girders, the intermediate beam is arranged between the two main girders and between the left end beam and the right end beam, and the platform is arranged in the area surrounded by the two main girders, the intermediate beam and the right end beam;

[0005] The left end beam comprises an upper end beam, a lower end beam and two first installation support rings. The upper end beam and the lower end beam are arranged corresponding to each other up and down, and the two first installation support rings are symmetrically arranged on the lower end beam;

[0006] The right end beam comprises a beam body and a second installation support ring. The second installation support ring is arranged directly below the middle of the beam body;

[0007] The two main girders, the left end beam and the right end beam are arranged in an isosceles trapezoid.

[0008] Further, in the above - mentioned three - support bridge girder for a crane, the length of the upper end beam is longer than that of the beam body. The top of the main girder is lapped with the top end of the upper end beam, the two ends of the upper end beam are welded to the corresponding sides of the two main girders, and the top end of the lower end beam is welded to the bottom ends of the two main girders.

[0009] Further, in the above - mentioned three - support bridge girder for a crane, the top of the main girder is lapped with the beam body, the bottom of the main girder is lapped with the bottom of the beam body, and one side of the beam body is welded to the two main girders.

[0010] Furthermore, in the above-mentioned three-point support bridge of the crane, wheels are installed on both the first installation support ring and the second installation support ring, and the wheels are distributed in a three-point support manner.

[0011] In another aspect of the present invention, a method for manufacturing a three-point support bridge of a crane is provided, including the following steps:

[0012] Step 1: Manufacture the main beam, beam body, upper end beam, lower end beam, and intermediate beam according to the force condition and functional requirements.

[0013] Step 2: Lap the beam body on the right sides of the two main beams, lap the upper end beam on the left top between the two main beams, lap the left sides of the two main beams on the lower end beam, and perform welding respectively to form an isosceles trapezoid with the two main beams, beam body, upper end beam, and lower end beam.

[0014] Step 3: Process the first installation support ring and the second installation support ring, and fix them on the beam body and the lower end beam respectively.

[0015] Step 4: Weld the intermediate beam between the two main beams, and weld the platform on the area surrounded by the intermediate beam, the two main beams, and the beam body.

[0016] Furthermore, in the above-mentioned method for manufacturing a three-point support bridge of a crane, the main beam is manufactured as a variable cross-section box girder, and the beam body, upper end beam, lower end beam, and intermediate beam are manufactured as equal cross-section box girders.

[0017] Furthermore, in the above-mentioned method for manufacturing a three-point support bridge of a crane, the processing method for the first installation support ring and the second installation support ring is integral machining by moving boring.

[0018] The three-point support bridge of the crane and its manufacturing method of the present invention have the following advantages and beneficial effects:

[0019] To sum up, compared with the prior art, the three-point support bridge of the crane and its manufacturing method of the present invention have the following advantages and beneficial effects: The bridge adopts an isosceles trapezoid structure, and the wheels and the track adopt three-point support, ensuring that the wheels at each support point always maintain good contact with the track, thereby reducing the factors of rail gnawing. The intermediate beam and the auxiliary platform can be arranged between the two main beams, improving the torsional stiffness of the bridge and reducing the width of the crane. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0021] Figure 1 It is a schematic structural view of the three - support bridge of the crane of the present invention;

[0022] Figure 2 It is a top view of the three - support bridge of the crane of the present invention;

[0023] Figure 3 It is a left view of the three - support bridge of the crane of the present invention;

[0024] Figure 4 It is a schematic structural view of the right end beam of the three - support bridge of the crane of the present invention;

[0025] Figure 5 It is a schematic structural view of the lower end beam of the three - support bridge of the crane of the present invention;

[0026] Figure 6 It is a schematic structural view of the box - type beam cross - section used in the manufacturing method of the three - support bridge of the crane of the present invention.

[0027] Explanation of reference numerals:

[0028] 1: Main beam;

[0029] 2: Left end beam, 21: Upper end beam, 22: Lower end beam, 23: First installation support ring;

[0030] 3: Right end beam, 31: Beam body, 32: Second installation support ring;

[0031] 4: Intermediate beam; 5: Platform; 6: Wheel. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the specific embodiments and corresponding drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0033] As Figures 1 to 5 shown, the three - support bridge of the crane of the present invention includes two main beams 1, a left end beam 2, a right end beam 3, an intermediate beam 4 and a platform 5, wherein: the two main beams 1 are symmetrically arranged, the left end beam 2 is arranged at the left end of the main beam 1, the right end beam 3 is arranged at the right end of the main beam 1, the intermediate beam 4 is arranged between the two main beams 1 and between the left end beam 2 and the right end beam 3, and the platform 5 is arranged in the area surrounded by the two main beams 1, the intermediate beam 4 and the right end beam 3;

[0034] The left-end beam 2 includes an upper-end beam 21, a lower-end beam 22, and two first mounting support rings 23. The upper-end beam 21 and the lower-end beam 22 are arranged in an up-and-down corresponding manner, and the two first mounting support rings 23 are symmetrically arranged on the lower-end beam 22;

[0035] The right-end beam 3 includes a beam body 31 and a second mounting support ring 32, and the second mounting support ring 32 is arranged directly below the middle of the beam body 31.

[0036] Furthermore, in the above-mentioned three-point support bridge of the crane, the two main beams 1, the left-end beam 2, and the right-end beam 3 are arranged in an isosceles trapezoid shape. The intermediate beam 4 and the platform 5 are welded between the two main beams 1, thereby effectively improving the torsional stiffness of the bridge and reducing the width of the crane at the same time.

[0037] Furthermore, in the above-mentioned three-point support bridge of the crane, the length of the upper-end beam 21 is longer than that of the beam body 31. The top of the main beam 1 overlaps with the top end of the upper-end beam 21. The two ends of the upper-end beam 21 are welded to the corresponding sides of the two main beams 1, and the top end of the lower-end beam 22 is welded to the bottom ends of the two main beams 1.

[0038] Furthermore, in the above-mentioned three-point support bridge of the crane, the top of the main beam 1 overlaps with the beam body 31, the bottom of the main beam 1 overlaps with the bottom of the beam body 31, and one side of the beam body 31 is welded to the two main beams 1, thereby effectively ensuring the rigid connection of the bridge.

[0039] Furthermore, in the above-mentioned three-point support bridge of the crane, wheels 6 are installed on both the first mounting support ring 23 and the second mounting support ring 32. The wheels 6 are distributed in a three-point manner, effectively ensuring that in any state, the wheels 6 will be in good contact with the track, thereby solving the problem of rail gnawing caused by the difference in the running speeds of the two ends of the wheels 6 due to wheel 6 slipping or suspension.

[0040] In another aspect of the present invention, a method for manufacturing a three-point support bridge of a crane is provided, including the following steps:

[0041] Step 1: Determine the structural form according to the force conditions and functional requirements, and manufacture the main beam 1, the beam body 31, the upper-end beam 21, the lower-end beam 22, and the intermediate beam 4;

[0042] Step 2: Overlap the extended part at the upper end of the beam body 31 on the extended parts on the right sides of the two main beams 1 to keep the beam body 31 horizontal with the two main beams 1. Overlap the extended part of the upper-end beam 21 on the left top between the two main beams 1 to keep the upper-end beam 21 horizontal with the two main beams 1. Overlap the left sides of the two main beams 1 on the lower-end beam 22. The lower-end beam 22 supports the two main beams 1, and weld them respectively to form an isosceles trapezoid with the two main beams, the beam body 31, the upper-end beam 21, and the lower-end beam 22;

[0043] Step 3: Process the first installation support ring 23 and the second installation support ring 32, and fix them on the beam body 31 and the lower end beam 22 respectively;

[0044] Step 4: Weld the intermediate beam 4 between the two main beams 1, and weld the platform 5 on the area surrounded by the intermediate beam 4, the two main beams 1 and the beam body 31.

[0045] Further, in the above method for manufacturing the three-point support bridge of the crane, as Figure 6 shown, the main beam 1 is manufactured as a variable cross-section box girder, and the beam body 31, the upper end beam 21, the lower end beam 22 and the intermediate beam 4 are manufactured as equal cross-section box girders, so that all components of the bridge are welded and rigidly connected, thereby ensuring that the overall bridge has good strength, stiffness and torsional resistance.

[0046] Further, in the above method for manufacturing the three-point support bridge of the crane, the processing method adopted for the first installation support ring 23 and the second installation support ring 32 is integral machining by moving boring, thereby effectively ensuring the parallelism of the axis of the wheel 6.

[0047] In summary, compared with the prior art, the three-point support bridge of the crane and its manufacturing method of the present invention have the following advantages and beneficial effects: The bridge adopts an isosceles trapezoidal structure, and three-point support is adopted between the wheels and the track, ensuring that the wheels at each support point always maintain good contact with the track, thereby reducing the factors of rail gnawing. The intermediate beam and the platform can be arranged between the two main beams, improving the strength, stiffness and torsional resistance of the bridge, ensuring the parallelism of the axis of the wheels, and reducing the width of the crane.

[0048] It should be noted that in this article, unless otherwise clearly specified and defined, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood according to specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. In addition, in this article, "front", "rear", "left", "right", "upper" and "lower" are all referenced to the placement state shown in the drawings.

[0049] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A three-point support bridge for a crane, characterized in that, The three-point support bridge of the crane includes two main beams, a left end beam, a right end beam, an intermediate beam and a platform, where: The two main beams are symmetrically arranged. The left end beam is arranged at the left end of the main beam, the right end beam is arranged at the right end of the main beam, the intermediate beam is arranged between the two main beams and between the left end beam and the right end beam, and the platform is arranged in the area enclosed by the two main beams, the intermediate beam and the right end beam; The left end beam includes an upper end beam, a lower end beam, and two first mounting support rings. The upper end beam and the lower end beam are arranged corresponding to each other up and down, and the two first mounting support rings are symmetrically arranged on the lower end beam; The right end beam includes a beam body and a second mounting support ring, and the second mounting support ring is arranged directly below the middle of the beam body; The two main beams, the left end beam and the right end beam are arranged in an isosceles trapezoid shape.

2. The three-point support bridge of the crane according to claim 1, characterized in that, The length of the upper end beam is longer than that of the beam body. The top of the main beam is lapped with the top end of the upper end beam, the two ends of the upper end beam are welded to the corresponding sides of the two main beams, and the top end of the lower end beam is welded to the bottom ends of the two main beams.

3. The three-point support bridge of the crane according to claim 1, characterized in that, The top of the main beam is lapped with the beam body, the bottom of the main beam is lapped with the bottom of the beam body, and one side of the beam body is welded to the two main beams.

4. The three-point support bridge of the crane according to claim 1, characterized in that Wheels are installed on both the first mounting support ring and the second mounting support ring, and the wheels are distributed in a three-point support pattern.

5. A manufacturing method for a three - support bridge of a crane, characterized in that, The manufacturing method of the three-point support bridge of the crane includes the following steps: Step 1: Manufacture the main beam, beam body, upper end beam, lower end beam and intermediate beam according to the force condition and functional requirements; Step 2: Lap the beam body on the right sides of the two main beams, lap the upper end beam on the top left between the two main beams, lap the left sides of the two main beams on the lower end beam, and weld them respectively so that the two main beams, the beam body, the upper end beam and the lower end beam form an isosceles trapezoid; Step 3: Process the first mounting support ring and the second mounting support ring, and fix them on the beam body and the lower end beam respectively; Step 4: Weld the intermediate beam between the two main beams, and weld the platform in the area enclosed by the intermediate beam, the two main beams and the beam body.

6. The manufacturing method of the three-point support bridge of the crane according to claim 5, characterized in that, In Step 1, the main beam is manufactured as a variable cross-section box beam, and the beam body, upper end beam, lower end beam and intermediate beam are manufactured as equal cross-section box beams.

7. The manufacturing method of the three-point support bridge of the crane according to claim 5, characterized in that, In Step 3, the processing method adopted for the first mounting support ring and the second mounting support ring is integral machining by moving boring.

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