A rope arrangement for a crane jib

Abstract

The utility model discloses a kind of rope row type hoist arm head, including inner section arm, outer section arm and the slider of being arranged in the inner side of outer section arm, further include adjusting mechanism, the adjusting mechanism includes the mount of being fixed on outer section arm, the radial adjusting assembly for adjusting the position of slider with mount cooperation, the radial adjusting assembly one end connects slider, another end and mount thread cooperation and is equipped with tool operating hole;Through the radial adjusting assembly and slider cooperation of exempting from disassembly, and combining the displacement control of threaded drive, the convenient adjustment of the clearance between slider and inner section arm is formed, the dynamic correction of side bending amount is realized, both improve the positioning accuracy and stability of hoist arm, also solve the problem of low efficiency of debugging caused by repeatedly disassembling slider of existing device, significantly improve the operation reliability of rope row type multi-section arm crane under complex working condition.

Description

Technical Field

[0001] This utility model relates to crane technology, and more particularly to a rope-type crane boom head. Background Technology

[0002] In the crane industry, common types of lifting jibs mainly include truss jibs, box jibs, and rope-mounted jibs, among others. Rope-mounted jibs, due to their unique structural advantages, have been widely adopted and used in practical applications. Rope-mounted jibs are primarily divided into two types: single-plate jib head structures and beveled jib head structures. However, regardless of whether it's a single-plate or beveled jib head structure, the lateral bending problem under load remains a major technical challenge in the design phase. Lateral bending under load specifically refers to the lateral bending deformation of the lifting jib during the lifting process. The key is to precisely control the distance between the left and right sides of the inner and outer jibs to ensure the overall stability and operational accuracy of the lifting jib. In existing technologies, fixed side sliders are typically used to effectively control the distance between the two sides. However, the adjustment process of the side slider in the existing technology is quite cumbersome. It requires first removing the slider, then changing the gap by adding or removing shims, and then reinstalling it into the crane arm. This not only limits the adjustment range, but also requires frequent repetition, which consumes a lot of time and manpower, seriously affects the debugging and production progress, and also significantly increases the workload of the staff. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide a rope-type crane boom head that allows for adjustment of the side slider without disassembly and is easy to operate.

[0004] Technical solution: The present invention provides a rope-type crane boom head, which includes an inner boom section, an outer boom section, and a slider disposed on the inner side of the outer boom section. It also includes an adjustment mechanism, which includes a mounting base fixed on the outer boom section and a radial adjustment component that cooperates with the mounting base for adjusting the position of the slider. One end of the radial adjustment component is connected to the slider, and the other end is threadedly engaged with the mounting base and is provided with a tool operation hole.

[0005] Preferably, the radial adjustment assembly consists of a fixed pin and an adjusting member. The fixed pin and the adjusting member are connected to the slider. The outer wall of the adjusting member is threadedly engaged with the inner wall of the mounting base and is rigidly connected to the fixed pin.

[0006] Preferably, the radial adjustment assembly further includes a limiting member that screws into the threaded hole on the side wall of the mounting base and abuts against the threaded surface of the adjustment member.

[0007] Preferably, the slider and the adjustment mechanism are symmetrically distributed in groups on both sides of the center line of the outer arm.

[0008] Preferably, the mounting base is fixed to the outer wall of the outer boom section by welding or bolting.

[0009] Preferably, the slider is provided with a fixing groove, and the fixing pin is composed of a protrusion and a column. The outer diameter of the protrusion is larger than the inner diameter of the fixing groove, and the column is connected to the adjusting component and is radially fixed.

[0010] Preferably, the tool operating hole in the radial adjustment assembly is an internal hexagonal hole, a cross groove, or an external square head.

[0011] Beneficial effects: Compared with the prior art, the present invention has the following advantages: The present invention, through the radial adjustment component that does not require disassembly and combined with the displacement control of the threaded transmission, forms a convenient adjustment of the gap between the slider and the inner boom, realizing the dynamic correction of the lateral bending amount. This not only improves the positioning accuracy and stability of the boom, but also solves the problem of low debugging efficiency caused by repeated disassembly of the slider in the existing device, and significantly improves the operational reliability of the rope-type multi-section boom crane under complex working conditions. Attached Figure Description

[0012] Figure 1 This is an exploded view of the outer arm upper slider and adjustment mechanism structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the overall structure of the rope-type crane boom head of this utility model.

[0014] Figure 3 This is a schematic diagram of the slider and adjustment mechanism of this utility model.

[0015] Figure 4 This is a schematic diagram of the slider structure of this utility model.

[0016] Figure 5-6 This is a schematic diagram of the adjustment mechanism of this utility model.

[0017] Figure 7 This is a schematic diagram of the mounting base structure of this utility model. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0019] like Figure 1-7As shown, a rope-type crane boom head includes an inner boom section and an outer boom section. Two sets of sliders 1 and an adjustment mechanism are symmetrically arranged on the inner side of the outer boom section. The adjustment mechanism includes a mounting base 2, a fixing pin 3, and an adjusting component 4. The mounting base 2 is fixed to the outer wall of the outer boom cylinder by welding, and its inner wall is machined with internal threads. The adjusting component 4 adopts a bolt structure with threads on its outer surface. One end has an internal hexagonal hole as a tool operating hole, and the other end is rigidly connected to the fixing pin 3 through an interference fit. The fixing pin 3 consists of a column and a protrusion 7 at its end, with the outer diameter of the protrusion 7 being larger than the diameter of the column. The inner side of the slider 1 has a flat contact surface with the inner boom section, and a circular fixing groove 6 is formed on its outer side. The inner diameter of the fixing groove 6 is smaller than the outer diameter of the protrusion 7 of the fixing pin 3. During assembly, the column of the fixing pin 3 is inserted into the fixing groove 6 of the slider 1, and the protrusion 7 abuts against the outer surface of the slider 1 to form an axial limit. Adjusting component 4 is screwed into the threaded hole of mounting base 2. Rotating the internal hexagonal socket drives the adjusting component 4 to move axially, which in turn pushes the fixing pin 3 and slider 1 to move radially, thus adjusting the gap between slider 1 and the inner boom section. After adjustment, the limiting component 5 is screwed into the threaded hole on the side wall of mounting base 2 and pressed against the threaded surface of adjusting component 4 to prevent it from rotating and loosening. When the boom bends laterally, the operator only needs to use a tool to rotate the adjusting components 4 on both sides to simultaneously adjust the position of slider 1 without disassembling any parts. Mounting base 2 serves as a basic support fixed to the outer boom section; adjusting component 4 realizes power input and displacement conversion; fixing pin 3 serves as an intermediate transmission component connecting adjusting component 4 and slider 1; limiting component 5 provides a motion locking function. All components form a closed force chain through mechanical cooperation, maintaining structural rigidity while ensuring adjustment accuracy.

[0020] The entire device operates on the principle of converting threaded transmission into radial linear motion. Clockwise rotation of the adjusting component 4 propels it along the thread of the mounting base 2 towards the inner arm, pushing the fixing pin 3 and slider 1 to press against the inner arm, reducing lateral clearance. Counterclockwise rotation increases the clearance. The mating design of the protrusion 7 of the fixing pin 3 and the fixing groove 6 of the slider 1 ensures slip-free power transmission while restricting the circumferential rotation of the slider 1. The symmetrically distributed adjusting mechanism allows independent control of the clearance on both sides, effectively correcting lateral bending deformation caused by uneven load. In practical applications, maintenance personnel can adjust the device through the exposed tool operating hole, eliminating the need to disassemble the arm section or slider 1 throughout the process, significantly improving debugging efficiency.

Claims

1. A rope-type crane boom head, comprising an inner boom section, an outer boom section, and a slider (1) disposed on the inner side of the outer boom section, characterized in that: It also includes an adjustment mechanism, which includes a mounting base (2) fixed on the outer arm and a radial adjustment component that cooperates with the mounting base (2) for adjusting the position of the slider (1). One end of the radial adjustment component is connected to the slider (1), and the other end is threadedly engaged with the mounting base (2) and is provided with a tool operation hole.

2. The rope-type crane boom head according to claim 1, characterized in that: The radial adjustment assembly consists of a fixed pin (3) and an adjusting member (4). The fixed pin (3) and the adjusting member (4) are connected to the slider (1). The outer wall of the adjusting member (4) is threadedly engaged with the inner wall of the mounting base (2) and rigidly connected to the fixed pin (3).

3. The rope-type crane boom head according to claim 2, characterized in that: The radial adjustment assembly also includes a limiting member (5), which screws into the threaded hole on the side wall of the mounting base (2) and abuts against the threaded surface of the adjusting member (4).

4. The boom head of the rope-type crane according to claim 1, characterized in that: The slider (1) and the adjustment mechanism are symmetrically distributed on both sides of the center line of the outer arm.

5. The boom head of the rope-type crane according to claim 1, characterized in that: The mounting base (2) is fixed to the outer wall of the outer boom cylinder by welding or bolting.

6. The boom head of the rope-type crane according to claim 2, characterized in that: The slider (1) is provided with a fixing groove (6), and the fixing pin (3) is composed of a protrusion (7) and a column. The outer diameter of the protrusion (7) is larger than the inner diameter of the fixing groove (6), and the column is connected to the adjusting member (4) and is radially fixed.

7. The boom head of the rope-type crane according to claim 1, characterized in that: The tool operating hole in the radial adjustment assembly is an internal hexagonal hole, a cross groove, or an external square head.

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