Tail boom of cargo boom, cargo boom and crane

Abstract

The utility model belongs to the field of cranes, and discloses a tail boom of a cargo boom, the cargo boom and the crane. The tail boom of the cargo boom comprises a mounting frame and a plurality of rollers; the plurality of rollers are rotatably mounted on the mounting frame around an axis extending in a first direction and are arranged at intervals, the centers of the wheel surfaces of the plurality of rollers are positioned in the same plane, and the wheel surfaces of the plurality of rollers are used for jointly winding a lifting rope of the crane. According to the tail section arm of the cargo boom, a plurality of idler wheels are arranged on an installation frame, winding of a lifting rope and multiplying power adjustment are achieved through the idler wheels, meanwhile, due to the fact that the centers of the wheel faces of the idler wheels are located in the same plane, different rope sections of the lifting rope are all located in the same plane for routing, and therefore the working efficiency of the cargo boom is improved. Deflection and twisting of the rope sections caused by lateral force due to position deviation are avoided, and then twisting and winding of different rope sections can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a last section of a boom, a boom and a crane. Background Art

[0002] Tower cranes are used for hoisting large objects. When the hoisting rope hoists an object up and down, it will bear on the rollers at the boom tip. In different usage scenarios, it is necessary to change the hoisting ratio of the tower crane, and different hoisting rope winding schemes will be adopted according to different changed ratios.

[0003] In the existing ratio change scheme, multiple rollers are coaxially arranged to realize different winding modes of the hoisting rope. However, during the hoisting process of the hoisting rope, the reciprocating winding of the hoisting rope between the rollers will cause the path of the rope segments to be mixed, and the force on the rollers is uneven, resulting in the hoisting rope being likely to twist and tangle, causing the rope segments of the hoisting rope to be entangled with each other, resulting in the inability to stably lift the hook. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a last section of a boom, a boom and a crane, aiming to solve the problem that the hook cannot be stably lifted.

[0005] To achieve the above purpose, the utility model provides a last section of a boom, including:

[0006] An installation frame; and,

[0007] A plurality of rollers, each of the plurality of rollers is rotatably installed on the installation frame around an axis extending in a first direction, and is arranged at intervals. The centers of the wheel surfaces of the plurality of rollers are in the same plane, and the wheel surfaces of the plurality of rollers are used for jointly winding the hoisting rope of the crane.

[0008] Optionally, the installation frame includes two installation plates arranged at intervals, and an installation gap is formed between the two installation plates. Each of the plurality of rollers is installed in the installation gap.

[0009] Optionally, the installation plate is in the shape of a triangular plate.

[0010] Optionally, the installation plate is provided with a hollow hole.

[0011] Optionally, the positions of the plurality of rollers are arranged at intervals in a polygon.

[0012] Optionally, there are three rollers, and the positions of the three rollers are arranged in a triangle.

[0013] Optionally, a limiting groove is recessed on the wheel surface of the roller.

[0014] The utility model also provides a lifting arm, comprising:

[0015] A plurality of spliced ​​arm sections, wherein the plurality of spliced ​​arm sections are sequentially fixedly connected, including a head end arm section and a tail end arm section respectively located at two ends; and,

[0016] The boom end section arm is the boom end section arm according to any one of the above items, wherein the mounting frame is mounted on the tail end boom section.

[0017] The utility model also provides a crane, comprising:

[0018] The tower crane body; and

[0019] A jib, which is the jib described above;

[0020] Wherein, the head end boom section is installed on the tower crane body.

[0021] Optionally, a working platform is also included, and the working platform is installed on the lifting arm.

[0022] The utility model provides a crane arm terminal arm, and a plurality of rollers are arranged on a mounting frame. The plurality of rollers are used to wind the lifting rope, so that the use ratio can be adjusted, and different lifting ratios can be achieved through different rope threading methods. At the same time, since the wheel surfaces of the plurality of rollers are located in the same plane, the different rope segments of the lifting rope are all routed in the same plane, and the lateral forces between the rope segments will not cause deflection and twisting due to position deviation, thereby avoiding twisting and entanglement between different rope segments, thereby ensuring stable lifting of the crane hook. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the end section of the boom provided by the embodiment of the utility model;

[0024] Figure 2 yes Figure 1 Schematic diagram of the top view of the structure of the last section of the middle crane arm.

[0025] Description of Figure Numbers:

[0026] Label Name Label Name 100 Last section of the boom 2 Roller 1 Mounting frame 3 Spliced arm section 11 Mounting plate 4 Working platform

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] Tower cranes are used to lift large objects. When the hoisting rope hoists an object up and down, it will bear on the rollers at the boom head. In different usage scenarios, it is necessary to change the hoisting ratio of the tower crane, and different hoisting rope winding schemes will be adopted according to different changed hoisting ratios.

[0032] In the existing hoisting ratio change schemes, multiple rollers are arranged coaxially to achieve different winding methods of the hoisting rope. However, during the hoisting process of the hoisting rope, the reciprocating winding of the hoisting rope between the rollers will cause the running paths of the rope segments to be confused, the force on the rollers to be uneven, resulting in the hoisting rope possibly twisting and jamming, causing the rope segments of the hoisting rope to be entangled with each other, and resulting in the inability to stably lift the hook.

[0033] Please refer to Figures 1 to 2, the present utility model provides a last section boom 100 of a lifting boom, which includes a mounting frame 1 and a plurality of rollers 2; the plurality of rollers 2 are all rotatably mounted on the mounting frame 1 around an axis extending in a first direction, and are arranged at intervals, and the centers of the wheel surfaces of the plurality of rollers 2 are in the same plane, and the wheel surfaces of the plurality of rollers 2 are used for jointly winding the hoisting rope of the crane.

[0034] In the last section boom 100 of the lifting boom provided by the present utility model, a plurality of the rollers 2 are arranged on the mounting frame 1, and the hoisting rope is wound through the plurality of rollers 2, so that the use ratio can be adjusted. Different hoisting modes with different ratios can be realized through different rope threading methods. At the same time, since the centers of the wheel surfaces of the plurality of rollers 2 are in the same plane, different rope segments of the hoisting rope are all routed in the same plane, and the rope segments will not be deflected, twisted and knotted due to lateral forces between them. Furthermore, the knotted winding between different rope segments can be avoided, ensuring the stable lifting of the crane hook.

[0035] It should be noted that the plurality of rollers 2 all rotate around an axis in the first direction. In this embodiment, the plurality of rollers 2 need to allow the hoisting rope to pass through. Among them, the mounting frame 1 extends along the length direction of the lifting boom, and the first direction is the width direction of the mounting frame, so as to realize the normal winding and sliding of the hoisting rope and ensure the normal operation of the last section boom 100 of the lifting boom.

[0036] In addition, it should be noted that the plurality of rollers 2 are used for winding the hoisting rope of the crane, and different lifting ratios are realized according to different winding methods. The winding method of the hoisting rope is a conventional technology in the field and will not be elaborated here.

[0037] In addition, the wheel surface of the roller 2 is a rolling surface. The roller 2 has two end faces and a rolling surface between the two end faces, and the hoisting rope is located on the rolling surface.

[0038] Furthermore, the mounting frame 1 includes two mounting plates 11 arranged at intervals, and an installation gap is formed between the two mounting plates 11. The plurality of rollers 2 are all installed in the installation gap. In this embodiment, in order to facilitate the winding of the hoisting rope, the plurality of rollers 2 are arranged in the installation gap, so that the rope segments can be threaded through the mounting frame and threaded onto the rollers 2 to realize the protection of the hoisting rope and the rollers 2.

[0039] It should be noted that there are various ways to form the installation gap by installing the two mounting plates 11 at intervals. For example, by connecting the two ends of the connecting rod to the two mounting plates 11 respectively, an installation gap is formed between the two mounting plates 11; or the two mounting plates 11 are directly installed on the boom at intervals to achieve an interval setting, and no specific limitation is made here.

[0040] In addition, the roller 2 is rotatably installed on the installation shaft into the installation gap. In an embodiment provided by the present invention, the two ends of the installation shaft of the roller 2 are respectively connected to the two mounting plates 11, so that the two mounting plates 11 are arranged at intervals. By using one shaft to simultaneously realize the installation of the roller 2 and the mounting plate 11, the cost is saved and the structure is ensured to be light.

[0041] Specifically, in this embodiment, the mounting plate 11 is in the shape of a triangular plate. In this embodiment, through the triangular plate, the force on the mounting plate 11 is more stable. At the same time, the angle installation of the boom head can be realized. By pointing the top of the triangular plate in different directions, the upward or downward tilt of the boom head can be realized.

[0042] In addition, the mounting plate 11 is provided with a hollow hole. In this embodiment, through the hollow hole, the weight of the mounting plate 11 is reduced, and the self-weight of the boom is reduced.

[0043] It should be noted that in the embodiment provided by the present invention, the mounting frame 1 includes two mounting plates 11 arranged at intervals. The mounting plate 11 is in the shape of a triangular plate, and the triangular plate is provided with a hollow hole. In this embodiment, the stability of the structure of the mounting frame 1 is provided, and at the same time, the weight of the mounting frame 1 is reduced.

[0044] On the other hand, the positions of the plurality of rollers 2 are arranged at intervals in a polygon. In this embodiment, the positions of the plurality of rollers 2 are arranged in a polygon, so that the plurality of rollers 2 are not on the same straight line, which is convenient for the winding of the hoisting rope on the rollers 2 and prevents the rope segments of the hoisting rope from intersecting.

[0045] In this embodiment, the roller 2 is arranged at the vertex position of the polygon, which is convenient for the winding of the hoisting rope.

[0046] Specifically, there are three rollers 2, and the positions of the three rollers 2 are arranged in a triangle. In this way, the control of the rope winding method is realized, so that it has an output vertex, which is convenient for rope winding, and single-fold, double-fold and quadruple load lifting methods can be realized.

[0047] On the other hand, a limiting groove is recessed on the wheel surface of the roller 2. In this embodiment, through the limiting groove, it is ensured that the hoisting rope is on the wheel surface of the roller 2, and the hoisting rope is prevented from falling off the roller 2.

[0048] In addition, the end section arm of the boom further includes a limiting arm, which is arranged at an interval from the wheel surface of the roller 2 to jointly limit the hoisting rope with the wheel surface of the roller 2. In this embodiment, the limiting arm prevents the hoisting rope from detaching from the wheel surface.

[0049] It should be noted that in the embodiment provided by the present utility model, three rollers 2 are arranged on the mounting frame 1, and the positions of the three rollers 2 are arranged in a triangle. Among them, a limiting groove is formed on the wheel surface of each roller 2. Corresponding to the wheel surface of the roller 2, a limiting arm is also installed on the mounting frame 1 to jointly limit the hoisting rope with the limiting groove; in addition, among the three rollers 2, they are arranged from top to bottom in sequence to prevent the three rollers from being in the same horizontal plane, thereby improving the pay-out and winding function among the three rollers.

[0050] The present utility model also provides a boom, which includes the above-mentioned end section arm of the boom, so it also has all the technical features of the above-mentioned end section arm of the boom, that is, it has the technical effects brought by the above-mentioned all technical features, and will not be elaborated here.

[0051] In the boom provided by the present utility model, it further includes a plurality of splicing arm sections 3, and the plurality of splicing arm sections 3 are fixedly connected in sequence, including a head end arm section and a tail end arm section at both ends respectively; among them, the mounting frame 1 is installed on the tail end arm section.

[0052] In the boom provided by the present utility model, a plurality of splicing arm sections 3 are spliced, and the end section arm 100 of the boom is spliced on the tail end arm section to form a complete boom. The hoisting rope is used to pass through the boom and is wound around a plurality of rollers on the end section arm 100 of the boom. The hoisting rope is on the wheel surface of the roller 2, and the wheel surfaces of the plurality of rollers 2 are in the same plane, so that different rope segments after the hoisting rope is wound are also in the same plane, and no pulling force in other directions will be generated, ensuring the safety of the hoisting rope and preventing the hoisting rope from shaking and winding together.

[0053] It should be noted that there are various splicing methods for the plurality of splicing arm sections 3, such as welding, etc. In this embodiment, the plurality of splicing arm sections 3 are spliced together by bolting.

[0054] Similarly, there are also various ways to splice the mounting frame 1 on the tail end arm section. In this embodiment, the mounting frame 1 is spliced on the tail end arm section by bolting, which is convenient for installation and disassembly.

[0055] In addition, in this embodiment, a bearing plate is further formed on the splicing arm section 3. The bearing plate is used to carry workers. In this embodiment, by providing the bearing plate on the splicing arm section 3, it is convenient for workers to move on the middle arm, so as to facilitate the adjustment of the arm sections at different positions.

[0056] Based on the above-mentioned boom, the present utility model further provides a crane. The crane includes the above-mentioned boom, so it also has all the technical features of the above-mentioned boom, that is, it has the technical effects brought by the above-mentioned all technical features, which will not be elaborated one by one here.

[0057] The present utility model provides a crane, which further includes a tower crane body; wherein, the head arm section is installed on the tower crane body. In this embodiment, a complete crane is formed by the press body and the boom. The hoisting rope on the crane is threaded through the boom and wound around a plurality of the rollers 2 to realize the hoisting of an object.

[0058] In the crane provided by the present utility model, the crane realizes the guiding hoisting of the hoisting rope through the end arm section 100 of the boom. The boom is used for the hoisting rope to pass through and is wound around a plurality of rollers on the end arm section 100 of the boom. The hoisting rope is on the wheel surface of the roller 2, and the wheel surfaces of the plurality of rollers 2 are in the same plane, so that different rope segments after the hoisting rope is wound are also in the same plane, and no pulling force in other directions will be generated, ensuring the safety of the hoisting rope and preventing the hoisting rope from shaking and being wound together.

[0059] A plurality of the rollers 2 are arranged on the mounting frame 1. By winding the hoisting rope around the plurality of rollers 2, the use of the pulley ratio can be adjusted, and different hoisting methods with different pulley ratios can be realized through different rope threading methods. At the same time, since the centers of the wheel surfaces of the plurality of rollers 2 are in the same plane, different rope segments of the hoisting rope are all routed in the same plane, and no lateral force will be generated between the rope segments due to position deviation, resulting in deflection, torsion and jamming. Furthermore, the jamming and winding between different rope segments can be avoided, ensuring the stable hoisting of the crane hook.

[0060] Furthermore, the crane further includes a working platform 4, and the working platform 4 is installed on the boom. This facilitates the installation and adjustment of the boom by the staff.

[0061] In this embodiment, the working platform 4 is arranged corresponding to the mounting frame 1 to facilitate personnel to adjust the hoisting rope on the mounting frame 1.

[0062] In addition, in this embodiment, a staircase is arranged on the working platform 4 to facilitate the movement of workers.

[0063] The crane further includes a hoisting structure, which includes a hoisting motor and a hoisting rope with one end wound around the output shaft of the hoisting motor. The hoisting rope is arranged inside the boom and wound around a plurality of the rollers 2.

[0064] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A crane boom distal section, characterized in that: include: Install the frame; as well as, A plurality of rollers, each of which is rotatably mounted on the mounting frame around an axis extending in a first direction and arranged at intervals, with the centers of the wheel surfaces of the plurality of rollers being in the same plane, and the wheel surfaces of the plurality of rollers being used to be used together for winding the hoisting rope of the crane; The plurality of rollers are arranged at intervals in a polygonal shape.

2. The boom distal section arm according to claim 1, characterized in that: The mounting frame comprises two mounting plates arranged at an interval, a mounting gap is formed between the two mounting plates, and the plurality of rollers are mounted in the mounting gap.

3. The boom distal section according to claim 2, characterized in that: The mounting plate is arranged in the form of a triangular plate.

4. The boom distal section according to claim 2, characterized in that: The mounting plate is provided with hollow holes.

5. The boom distal section according to claim 1, characterized in that: There are three rollers, and the three rollers are arranged in a triangle.

6. The boom distal section arm according to claim 1, characterized in that: A limiting groove is concavely provided on the wheel surface of the roller.

7. A lifting arm, characterized in that: include: A plurality of spliced ​​arm sections, wherein the plurality of spliced ​​arm sections are fixedly connected in sequence, including a head end arm section and a tail end arm section respectively located at two ends; as well as, The boom terminal arm is a boom terminal arm according to any one of claims 1 to 6, wherein the mounting frame is mounted on the tail end boom section.

8. A crane, characterized in that: include: Tower crane body; as well as, A lifting arm, which is the lifting arm according to claim 7; Wherein, the head end boom section is installed on the tower crane body.

9. The crane according to claim 8, characterized in that Also included is a working platform mounted to the boom.

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