Arm section and tower crane

Abstract

The utility model provides an arm section and a tower crane. The arm section is applied to the tower crane and comprises a first main chord member and a second main chord member which are arranged in parallel and connected with each other through a web member, a pin shaft hole perpendicular to the length direction of the first main chord member is formed in the end of the first main chord member, and the arm section further comprises an oil cylinder supporting groove of a driving oil cylinder for inserting and pulling a pin shaft. And the oil cylinder bracket is arranged on the first main chord member and faces the pin shaft hole. According to the invention, the operation convenience is improved.

Description

Technical Field

[0001] This application relates to the field of cranes, and more specifically to a boom and tower crane. Background Technology

[0002] Different structures of a crane (such as two booms) are usually connected by pins. However, due to factors such as corrosion and alignment issues, the resistance between the pins and other structures increases, making manual insertion and removal of the pins difficult. Existing automatic pin removal devices often require additional fasteners to secure them to the boom, resulting in more connecting parts and inconvenient operation. Utility Model Content

[0003] This application provides a boom and a tower crane to solve the problem of inconvenient insertion and removal of the pins in existing booms.

[0004] To solve the above problems, this application is implemented as follows:

[0005] In a first aspect, the present invention provides a boom section for use in a tower crane, comprising a first main chord and a second main chord arranged in parallel and connected to each other by web members. The end of the first main chord is provided with a pin hole perpendicular to the length direction of the first main chord. The boom section also includes a cylinder support groove for providing a drive cylinder for inserting and removing the pin. The cylinder support groove is provided on the first main chord and is oriented toward the pin hole.

[0006] In some embodiments, the cylinder support is provided with multiple sets of limiting grooves, which are used to fix the drive cylinder when the pin is inserted or pulled out.

[0007] In some embodiments, the limiting groove is in the shape of an inverted "Y" or an inverted "T".

[0008] In some embodiments, the cylinder support groove includes a base plate and side walls, with two side walls connected to the base plate on opposite sides, and the limiting groove is formed in the side walls.

[0009] In some embodiments, the sidewall includes a recess extending toward the base plate, the recess forming a clearance notch for disassembling the drive cylinder.

[0010] In some embodiments, the base plate has an opening for drainage and for disassembling the drive cylinder fixed in the limiting groove.

[0011] In some embodiments, the line connecting the orthographic projections of each set of the limiting grooves onto the base plate intersects with the opening.

[0012] In some embodiments, a drive cylinder is also included, the tail of which is provided with a limit pin, the limit pin matching the limit groove, so as to be engaged in the limit groove when the pin is inserted or removed.

[0013] Secondly, this application provides a tower crane including the boom section described in any of the above claims.

[0014] In this embodiment, by providing a cylinder support groove on the main chord of the boom, the operation is made easier by inserting and removing the pin by driving the cylinder. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the arm segment provided in an embodiment of the present invention. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0018] In the embodiments of this utility model, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices. Additionally, the use of "and / or" in this application indicates at least one of the connected objects, such as A and / or B and / or C, representing seven possibilities: including A alone, B alone, C alone, and the presence of both A and B, both B and C, both A and C, and the presence of A, B, and C.

[0019] This utility model embodiment provides a boom section 10, which is applied to a tower crane.

[0020] In one embodiment, the arm section 10 includes a first main chord 101 and a second main chord 102 arranged side by side and connected to each other by a web member. The end of the first main chord 101 is provided with a pin hole perpendicular to the length direction of the first main chord 101.

[0021] In this embodiment, the number of first main chord members 101 and second main chord members 102 can be one or more, but not simultaneously one. For example, when the arm section 10 is a triangular arm section 10, it includes one first main chord member 101 and two second main chord members 102; when the arm section 10 is an inverted triangular arm section 10, it includes two first main chord members 101 and one second main chord member 102; and when the arm section 10 is a quadrilateral arm section 10, it includes two first main chord members 101 and two second main chord members 102. The main chord members are connected by web members; specific details can be found in related technologies, and this embodiment does not further limit or describe them.

[0022] The boom 10 also includes a cylinder support 103 for mounting a drive cylinder for inserting / removing the pin. The cylinder support 103 is mounted on the first main chord 101 and faces the pin hole. When the pin needs to be inserted / removed, the drive cylinder is positioned in the cylinder support 103, and the pin is inserted / removed by the drive cylinder. With the cylinder support 103 facing the pin hole, its position is relatively accurate, avoiding the alignment error caused by the traditional method of separate disassembly and reassembly with inversion.

[0023] In some embodiments, the cylinder support 103 is provided with multiple sets of limiting grooves. The limiting grooves are used to fix the drive cylinder when the pin is inserted or pulled out. The tail of the drive cylinder is provided with a limiting pin, which matches the limiting groove so that it is locked in the limiting groove when the pin is inserted or pulled out. In this way, the cylinder support 103 can adapt to different drive cylinders held by different users, making it easier to promote and use.

[0024] In some embodiments, the limiting groove is in the shape of an inverted "Y" or an inverted "T". This way, when the pin is inserted and when it is removed, the limiting groove is engaged at two fixed points in the Y-shaped or T-shaped groove, reducing the possibility of detachment and improving reliability.

[0025] In some embodiments, the cylinder support 103 includes a base plate and side walls. Two side walls are connected to the base plate on opposite sides, and a limiting groove is formed in the side walls. In some embodiments, the side walls include recesses extending towards the base plate, forming clearance notches for disassembling the drive cylinder. It should be understood that tower cranes and other mechanical equipment often deform during use or transportation due to collisions with other equipment or structures. By adjusting the shape of the side walls, even if the cylinder support 103 deforms, sufficient space can be provided for disassembling and assembling the drive cylinder, improving reliability.

[0026] In some embodiments, an opening is provided on the base plate for drainage and for disassembling the drive cylinder fixed in the limiting groove.

[0027] In some embodiments, the line connecting the orthographic projections of each set of limiting grooves onto the base plate intersects with the opening. This allows force to be applied to the drive cylinder through the opening when the limiting cylinder becomes stuck, facilitating the removal of the drive cylinder.

[0028] This application provides a tower crane including the boom section 10 of any of the above embodiments. The tower crane of this embodiment includes all the technical solutions of the above-described boom section 10 embodiments, and therefore can achieve all the above-described technical effects, which will not be repeated here.

[0029] The above description is 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 principle 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 boom joint used in tower cranes, characterized in that, The arm section includes a first main chord and a second main chord arranged side by side and connected to each other by a web member. The end of the first main chord has a pin hole perpendicular to the length direction of the first main chord. The arm section also includes a cylinder support groove for setting a drive cylinder for inserting and removing the pin. The cylinder support groove is set on the first main chord and faces the pin hole.

2. The arm segment of claim 1, wherein The cylinder support groove is provided with multiple sets of limiting grooves, which are used to fix the drive cylinder when the pin is inserted or pulled out.

3. The arm segment of claim 2, wherein, The limiting groove is in the shape of an inverted "Y" or an inverted "T".

4. An arm segment as claimed in claim 2 or 3, characterized in that The cylinder support groove includes a base plate and side walls. The two side walls are respectively connected to the base plate on opposite sides. The limiting groove is formed in the side wall.

5. The arm segment of claim 4, wherein, The sidewall includes a recess extending toward the base plate, the recess forming a clearance notch for disassembling the drive cylinder.

6. The arm segment of claim 4, wherein, An opening is provided on the base plate for drainage and for disassembling the drive cylinder fixed in the limiting groove.

7. The arm segment of claim 6, wherein, The line connecting the orthographic projections of each set of limiting grooves on the base plate intersects with the opening.

8. The arm segment of claim 2 or 3, wherein, It also includes a drive cylinder, the tail of which is provided with a limit pin, which matches the limit groove so that it is locked in the limit groove when the pin is inserted or pulled out.

9. A tower crane, characterized in that Includes the arm segment as described in any one of claims 1 to 6.

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