Heightening device for suspension arm

Abstract

The utility model provides a heightening device for a lifting arm, which is used for increasing the lifting height of the lifting arm of a crane and comprises more than two connecting lugs, heightening modules and rib plates, the two heightening modules are respectively and fixedly arranged on a revolving platform and are symmetrically arranged relative to the central axis of the revolving platform, the connecting lugs are fixedly arranged at the tops of the heightening modules, and the rib plates are arranged on the connecting lugs. A first vertical part is arranged on one side between the top and the bottom of the heightening module, a second vertical part and an inclined part are arranged on the other side between the top and the bottom of the heightening module, the first vertical part is connected with one side of the connecting lug, and the two ends of the inclined part are connected with the second vertical part and the other side of the connecting lug correspondingly; the first vertical part and the second vertical part are arranged in parallel, the inclined part and the second vertical part are obliquely arranged, the rib plate is fixedly connected to the inner side of the heightening module and is perpendicular to the heightening module, the structure is simple, and the lifting arm can be conveniently adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crane technical field, concretely relates to a heightening device for lifting height of boom. BACKGROUND

[0002] The ship crane is mainly applied to the port, wharf and ship, and controls the boom to lift the article, generally speaking, such as Figure 1 As shown in the figure, the length of the boom 1' is fixedly designed, and the height of the platform base 2' is also fixedly designed in the design of the crane, and in the actual application, the length of the article is similar to the length of the boom, in order to improve the safety of the lifting operation, the lifting height of the boom needs to be improved. The lifting height of the boom can be increased by increasing the length of the original boom, so as to meet the requirements of the lifting height, or by increasing the height of the rotating platform base, but the above problems exist: since the original length of the boom is designed to match the hydraulic amplitude system, the steel wire rope amplitude system and the winch amplitude system of the crane, if the length of the boom is increased, the above amplitude systems need to be changed to meet the operation requirements of the crane, so the cost of the change is very large and the operation is complex. In addition, if the height of the rotating platform base is increased, the bearing of the entire rotating platform needs to be redesigned, which is troublesome and complex to process. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a heightening device for the boom, which can improve the lifting height of the crane boom, and has simple structure, convenient operation and low application cost.

[0004] In order to achieve the above purpose, a heightening device for the boom is used to improve the lifting height of the crane boom, which comprises two or more connecting ears, heightening modules and a rib plate, the two heightening modules are fixedly arranged on the rotating platform and symmetrically arranged about the center axis of the rotating platform, the connecting ears are fixedly arranged on the top of the heightening module, a first vertical part is arranged on one side between the top and the bottom of the heightening module, a second vertical part and an inclined part are arranged on the other side between the top and the bottom of the heightening module, the first vertical part is connected with one side of the connecting ear, the two ends of the inclined part are respectively connected with the second vertical part and the other side of the connecting ear, the first vertical part and the second vertical part are arranged in parallel, and the inclined part is arranged inclinedly between the second vertical part.

[0005] The above arrangement, by arranging the height increasing module between the connecting lug and the rotary platform, after the hoist arm is connected to the connecting lug, the lifting height of the hoist arm can be indirectly increased. Since the connecting lug is connected to the hoist arm and the tripod through the first through hole and the second through hole respectively, the connecting lug and the height increasing module form a whole which is extruded by the hoist arm and the tripod. In addition, during the lifting process, the hoist arm also generates a bending moment acting on the whole formed by the connecting lug and the height increasing module. After the first vertical part of the height increasing module is connected to the connecting lug, the first vertical part and the second vertical part are arranged in parallel, so that the bottom of the height increasing module can bear a larger force. Since the lifting height of the hoist arm is increased, the bending moment acting on the connecting lug also changes. By arranging the inclined part, the bottom of the height increasing module is connected to the connecting lug, so that the connecting lug and the height increasing module form an integral whole which can bear a larger bending moment to meet the lifting requirements. At the same time, the height increasing module can be arranged to achieve the height increasing, and the structure is simple.

[0006] Further, the width between the connecting lugs matches the width of the height increasing module.

[0007] The above arrangement can align the two side surfaces of the connecting lug with the two side surfaces of the height increasing module after the connecting lug is welded to the height increasing module.

[0008] Further, the connecting lug is provided with a first through hole and a second through hole, and the distance from the center of the first through hole to the top of the height increasing module is equal to the distance from the center of the second through hole to the top of the height increasing module.

[0009] The above arrangement ensures that the first through hole and the second through hole are on the same horizontal line after the connecting lug is welded to the height increasing module.

[0010] Further, a spacing is provided between the first through hole and the second through hole.

[0011] The above arrangement ensures that the hoist arm and the tripod can be installed on the connecting lug at the same time.

[0012] Further, one side of the rib plate is fixedly connected to the inner side of the height increasing module, and the bottom of the rib plate is fixedly connected to the rotary platform.

[0013] The above arrangement can better fix the height increasing module on the rotary platform, so that the height increasing module has better bearing capacity.

[0014] Further, the top of the height increasing module is arranged in parallel with the bottom, the first vertical part and the second vertical part are arranged perpendicularly to the rotary platform, and the bottom of the height increasing module is fixedly connected to the rotary platform after being tightly attached to the rotary platform.

[0015] The above arrangement ensures that the height increasing module is fixed on the rotary platform and is arranged perpendicularly to the rotary platform.

[0016] Further, the first vertical part is connected to one side of the connecting lug and is located in the same vertical plane, and the inclined part is connected to the other side of the connecting lug and is located in the same inclined plane as the inclined part.

[0017] The above arrangement can connect the lug to be welded and fixed on the top of the heightening module, and can be matched and aligned with the heightening module to form an integral body.

[0018] Further, the angle between the inclined part and the second vertical part is 140°-160°.

[0019] The above arrangement forms an obtuse angle between the inclined part and the second vertical part, so that the boom is inclined to the inside of the base. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the prior art boom.

[0021] Figure 2 It is a side view of the utility model.

[0022] Figure 3 It is a front view of the utility model.

[0023] Figure 4 It is a practical application schematic diagram of the utility model.

[0024] Figure 5 It is Figure 4 An enlarged view of A in the middle. DETAILED DESCRIPTION

[0025] The utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0026] As Figures 2 to 5 shown, a heightening device for a boom is used for increasing the height of a crane boom, which comprises two or more connecting lugs 1, a heightening module 2 and a rib plate 3, and in the embodiment, as Figure 2As shown in the figure, the connecting ears 1 are provided in four, the heightening modules 2 are provided in two, the rib plates 3 are provided in two, the two heightening modules 2 are respectively fixedly connected to the rotary platform 4 along the length direction of the rotary platform 4 and are symmetrically arranged about the central axis 5 of the rotary platform 4, the top 21 and the bottom 22 of the heightening module 2 are arranged in parallel, a first vertical part 23 is arranged on one side between the top 21 and the bottom 22 of the heightening module 2, a second vertical part 24 and an inclined part 25 are arranged on the other side between the top 21 and the bottom 22 of the heightening module 2, the first vertical part 23 and the second vertical part 24 are arranged perpendicularly to the rotary platform 4, the bottom 21 of the heightening module 2 is fixedly connected to the rotary platform 4 in close contact with the rotary platform 4, the first vertical part 23 and the second vertical part 24 are arranged in parallel, an angle a is formed between one end of the inclined part 25 and the second vertical part 24, the value range of a is 140°-160°, in this embodiment, a = 157°, the height of the first vertical part 23 is 5m, the height of the second vertical part 24 is 2m, and the height of the first vertical part 23 and the height of the second vertical part 24 can be adjusted according to the actual application requirements.

[0027] As shown in the figure, Figure 3 The width of the two connecting ears 1 matches the width of the heightening module 2, in this embodiment, the distance between the outer sides 15 of the two connecting ears 1 is equal to the width of the heightening module 2, the connecting ears 1 are fixedly connected to the top 21 of the heightening module 2, so that after the connecting ears 1 are fixedly connected to the heightening module 2, the two side surfaces of the connecting ears 1 can be aligned with the two side surfaces of the heightening module 2.

[0028] As shown in the figure, Figure 2 The first vertical part 23 is connected to one side 11 of the connecting ear 1, the first vertical part 12 is located in the same vertical plane after being connected to one side 11 of the connecting ear 1, the other end of the inclined part 25 is connected to the other side 12 of the connecting ear 1, the inclined part 25 is located in the same inclined plane after being connected to the other side 12 of the connecting ear 1, so that after the connecting ear 1 is fixedly connected to the top 21 of the heightening module 2, it can be matched and aligned with the heightening module 2 to form an integral whole.

[0029] As shown in the figure, Figure 2 The first through hole 13 and the second through hole 14 are arranged on the connecting ear 1, a spacing is arranged between the first through hole 13 and the second through hole 14, which can ensure that the boom 6 is installed on the connecting ear 1, the distance from the center of the first through hole 13 to the top 21 of the heightening module 2 is equal to the distance from the center of the second through hole 14 to the top 21 of the heightening module 2, so that after the connecting ear 1 is fixedly connected to the heightening module 2, the first through hole 13 and the second through hole 14 are located on the same horizontal straight line 8.

[0030] As shown in the figure, Figure 3As shown, the rib plate 3 is fixedly connected to the inner side of the heightening module 2 and is arranged perpendicularly to the heightening module 2, specifically, one side 31 of the rib plate 3 is fixedly connected to the inner side of the heightening module 2, the bottom 32 of the rib plate 3 is fixedly connected to the rotary platform 4, in this embodiment, the height of the rib plate 3 is equal to the distance from the center of the first through hole 13 to the top 21 of the heightening module 2, the other side 33 of the rib plate 3 is arranged in parallel to the heightening module 2, and the top 34 of the rib plate 3 is arranged obliquely, so that the connecting lug 1 is fixedly connected to the heightening module 2 from the inner side of the heightening module 2 through the rib plate 3 to form an integral whole, the rib plate 3, the connecting lug 1 and the heightening module 2 form an integral whole, the connecting lug 1 can bear greater force, and the strength is greater, the hoisting height of the boom is improved, and the hoisting requirement is met.

[0031] In this embodiment, the fixed connection of the connecting lug 1 to the heightening module 2, the fixed connection of the heightening module 2 to the rotary platform 4 and the fixed connection of the rib plate 3 to the heightening module 2 are all achieved by welding.

Claims

1. A heightening device for a boom, used for increasing the height of a crane boom, comprising two or more connecting ears, a heightening module and a web plate, characterized in that: Two heightening modules are fixedly arranged on the rotary platform and symmetrically arranged about the central axis of the rotary platform, the connecting lug is fixedly arranged on the top of the heightening module, a first vertical part is arranged on one side between the top and the bottom of the heightening module, a second vertical part and an inclined part are arranged on the other side between the top and the bottom of the heightening module, the first vertical part is connected with one side of the connecting lug, the two ends of the inclined part are respectively connected with the second vertical part and the other side of the connecting lug, the first vertical part is arranged in parallel with the second vertical part, and the inclined part is arranged in an inclined manner between the first vertical part and the second vertical part, and the rib plate is fixedly connected to the inner side of the heightening module and arranged perpendicularly to the heightening module.

2. A height increasing device for a boom according to claim 1, characterized in that The width between the connecting lugs matches the width of the heightening module.

3. The height increasing device for a boom according to claim 1, characterized in that: First and second through holes are arranged on the connecting lug, the distance from the center of the first through hole to the top of the heightening module is equal to the distance from the center of the second through hole to the top of the heightening module.

4. The height increasing device for a boom according to claim 2, characterized in that: A spacing is arranged between the first and second through holes.

5. The height increasing device for a boom according to claim 1, characterized in that: One side of the rib plate is fixedly connected to the inner side of the heightening module, and the bottom of the rib plate is fixedly connected to the rotary platform.

6. The height increasing device for a boom according to claim 1, characterized in that: The top and the bottom of the heightening module are arranged in parallel, the first and second vertical parts are arranged perpendicularly to the rotary platform, and the bottom of the heightening module is fixedly connected to the rotary platform after being closely attached to the rotary platform.

7. The height increasing device for a boom according to claim 1, characterized in that: After being connected with one side of the connecting lug, the first vertical part is located in the same vertical plane, and after being connected with the other side of the connecting lug, the inclined part is located in the same inclined plane of the inclined part.

8. The height increasing device for a boom according to claim 1, characterized in that: The angle formed between the inclined part and the second vertical part is 140°-160°.

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