A crane boom tail structure and a crane

Abstract

The utility model discloses a crane technical field's hoist arm tail structure and crane, include: arm tail main part, it is fixed in hoist arm cylinder on half surrounding, and arm tail main part faces one end of hoist arm cylinder and is equipped with the convex part for inlaying in hoist arm cylinder inner wall. The utility model's half surrounding type hoist arm tail structure, arm tail and cylinder adopt inlaying type connecting mode, increase hoist arm structure's strength, rigidity, make hoist arm internal structure more compact simultaneously, and half surrounding type hoist arm tail structure has increased the interior space of arm tail, rationally utilizes hoist arm internal limited space, guarantees hoist arm telescopic oil cylinder cylinder head to have better passability at hoist arm arm tail, simple structure, the processing difficulty is lower, has reduced the weight of arm tail greatly, reduced production cost.

Description

Technical Field

[0001] This utility model relates to a boom tail structure and a crane, belonging to the field of crane technology. Background Technology

[0002] With the development and popularization of single-cylinder rope-arranged boom technology, the boom extension and retraction method has evolved from the initial single-cylinder + two-section rope arrangement to a single-cylinder + four-stage rope arrangement. The single-cylinder rope-arranged boom has also evolved from a four-section boom to a six-section boom. This has brought about a major challenge in boom internal layout design. Due to the increase in boom sections and limited boom space, the cross-section of the final boom section decreases, making it more difficult for the boom extension cylinder head to enter the final boom section, thus affecting the normal extension and retraction of the boom.

[0003] Currently, the boom tail structure of single-cylinder rope conveyor booms adopts a box-type structure. The boom tail is a fully enclosed box structure, with internal stiffening plates to support it, improving the strength and rigidity of the boom tail. The boom tail is connected to the cylinder by fillet welds. This type of boom tail structure is the most commonly used boom tail structure in rope conveyor booms.

[0004] However, this type of boom tail structure is heavy, has many internal stiffeners, requires a lot of welding work, and is only suitable for use when the cylinder plate is thick. When the cylinder plate is thin, this structure cannot be joined to the cylinder by fillet welds. At the same time, the box-shaped structure occupies a lot of space inside the boom, and the inner size of the boom tail is small. When the boom cross-section is small, this structure will affect the passage of the boom cylinder head inside the boom tail, thus affecting the normal extension and retraction of the boom.

[0005] Therefore, it is necessary to design a boom tail structure that can effectively utilize the internal space of the boom, improve the reliability of boom extension and retraction, and at the same time achieve boom weight reduction and cost reduction. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a boom tail structure and a crane.

[0007] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution.

[0008] In a first aspect, this utility model discloses a crane boom tail structure, comprising: The boom tail body is partially fixed to the boom cylinder, and the end of the boom tail body facing the boom cylinder has a protrusion for embedding in the inner wall of the boom cylinder.

[0009] Furthermore, the end of the boom cylinder facing the boom tail body has a stepped structure, and the bottom of the boom tail body is set on the platform of the step.

[0010] Furthermore, the connection between the boom tail body and the boom cylinder is fixed by welding.

[0011] Furthermore, the end of the boom tail body away from the boom cylinder is provided with an extension.

[0012] Furthermore, the extension is located at the upper part of the end of the boom cylinder that is away from the boom body.

[0013] Furthermore, the arm tail body is provided with several through holes for installing the arm retraction pulley and the cable fixing pin.

[0014] Furthermore, the main body of the arm tail is also provided with several channels.

[0015] In a second aspect, the present invention also discloses a crane, including the boom tail structure described in the first aspect.

[0016] The beneficial effects achieved by this utility model are: The semi-enclosed boom tail structure of this utility model adopts an embedded connection method between the boom tail and the cylinder, which increases the strength and rigidity of the boom structure and makes the internal structure of the boom more compact. In addition, the semi-enclosed boom tail structure increases the internal space of the boom tail, makes reasonable use of the limited internal space of the boom, and ensures that the cylinder head of the boom telescopic cylinder has good passage at the boom tail. The structure is simple, the processing difficulty is low, and the weight of the boom tail is greatly reduced, thus reducing the production cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the boom tail structure of this utility model; Figure 2 This is an exploded schematic diagram of the connection structure between the boom tail structure and the boom cylinder of this utility model. Figure 3 This is a schematic diagram of the structure after the boom tail structure of this utility model is connected to the boom cylinder.

[0018] In the diagram: 1-Boom tail body; 2-Lifting boom cylinder; 3-Step; 4-Protrusion; 5-Extension; 6-Connecting hole; 7-Channel. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example 1, such as Figures 1-3 As shown in the figure, this embodiment introduces a crane boom tail structure, including: The boom tail body 1 is semi-enclosed and fixed to the boom cylinder 2, and the end of the boom tail body 1 facing the boom cylinder 2 has a protrusion 4 for embedding in the inner wall of the boom cylinder. The boom tail and the cylinder adopt an embedded connection method, which increases the strength and rigidity of the boom structure, while making the internal structure of the boom more compact. The semi-enclosed design increases the internal space of the boom tail, makes reasonable use of the limited internal space of the boom, and ensures that the cylinder head of the boom telescopic cylinder has good passage at the boom tail.

[0023] The end of the boom cylinder 2 facing the tail body 1 has a stepped structure. The bottom of the tail body 1 is set on the platform of the step 3, which increases the welding area between the tail body 1 and the boom cylinder 2. This reduces the weight of the tail body 1 while improving the reliability of the connection between the tail body 1 and the boom cylinder 2.

[0024] The connection between the boom tail body 1 and the boom cylinder 2 is fixed by welding, which improves the reliability of the boom structure.

[0025] Example 2 is based on the same inventive concept as Example 1, such as... Figures 1-3 As shown in the figure, this embodiment introduces a crane boom tail structure, including: The boom tail body 1 is semi-enclosed and fixed to the boom cylinder 2, and the end of the boom tail body 1 facing the boom cylinder 2 has a protrusion 4 for embedding in the inner wall of the boom cylinder. The boom tail and the cylinder adopt an embedded connection method, which increases the strength and rigidity of the boom structure, while making the internal structure of the boom more compact. The semi-enclosed design increases the internal space of the boom tail, makes reasonable use of the limited internal space of the boom, and ensures that the cylinder head of the boom telescopic cylinder has good passage at the boom tail.

[0026] The end of the boom cylinder 2 facing the boom tail body 1 has a stepped structure. The bottom of the boom tail body 1 is set on the platform of the step 3, which increases the welding area between the boom tail body 1 and the boom cylinder 2. This reduces the weight of the boom tail body 1 while improving the reliability of the connection between the boom tail body 1 and the boom cylinder 2.

[0027] The connection between the boom tail body 1 and the boom cylinder 2 is fixed by welding, which improves the reliability of the boom structure.

[0028] The end of the boom tail body 1 away from the boom cylinder 2 is provided with an extension 5; the extension 5 is located at the upper part of the end away from the boom cylinder 2, and extends outward to increase the contact area of ​​the boom tail slider, optimize the force on the slider, and improve the smoothness of boom extension and retraction.

[0029] The arm tail body 1 is provided with several connecting holes 6 for installing the arm retraction pulley and cable fixing pin, thereby improving the space utilization of the arm tail body 1 and making the arm tail body 1 more compact.

[0030] The arm tail body 1 is also provided with several holes 7 for installing the arm retraction pulley and adjusting the arm extension cable, while reducing the overall weight of the arm tail body 1.

[0031] Example 3, based on the same inventive concept as Example 1, introduces a crane including the boom tail structure of Example 1.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A crane boom tail structure, characterized in that, include: The boom tail body (1) is partially fixed to the boom cylinder (2), and the end of the boom tail body (1) facing the boom cylinder (2) is provided with a protrusion (4) for embedding in the inner wall of the boom cylinder.

2. The boom tail structure according to claim 1, characterized in that, The end of the boom cylinder (2) facing the boom tail body (1) has a stepped structure, and the bottom of the boom tail body (1) is set on the platform of the step (3).

3. The boom tail structure according to claim 1, characterized in that, The connection between the boom tail body (1) and the boom cylinder (2) is fixed by welding.

4. The boom tail structure according to claim 1, characterized in that, The boom tail body (1) has an extension (5) at one end away from the boom cylinder (2).

5. The boom tail structure according to claim 4, characterized in that, The extension (5) is located at the upper part of one end away from the boom cylinder (2).

6. The boom tail structure according to claim 1, characterized in that, The arm tail body (1) is provided with several connecting holes (6) for installing the arm retraction pulley and cable fixing pin.

7. The boom tail structure according to claim 1, characterized in that, The arm tail body (1) is also provided with several channels (7).

8. A crane, characterized in that, Includes the boom tail structure as described in any one of claims 1-7.

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