Modular crane jib mechanism

Abstract

This utility model relates to a modular crane jib mechanism, specifically designed for large-tonnage all-terrain cranes, aiming to solve the problems of large space occupation and high transportation costs associated with traditional transportation methods. This mechanism significantly reduces transportation space and costs by mounting a lightweight jib inside an extension section. Specifically, a guide bracket is welded below the head of the lightweight jib, and guide wheels and rollers are installed below the front of the extension section. An internal positioning plate is provided for securing the lightweight jib. The mounting process is simple and quick; through the cooperation of the guide wheels and rollers, the lightweight jib can be quickly inserted into the extension section, occupying minimal space during transportation. It can be quickly pulled out upon arrival at the work site without affecting use. Furthermore, this mechanism is safe and reliable; the design of the guide wheels, rollers, and positioning plate ensures stability during transportation and prevents the jib from detaching. This utility model not only improves transportation efficiency but also has broad application prospects and significant practical value.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a modular crane jib mechanism, which is suitable for transporting the jib of a large-tonnage crane. Background Technology

[0002] Large-tonnage cranes (all-terrain) are typically equipped with long, multi-section jib. Due to the crane's own weight, the jib cannot be carried during relocation and must be transported by trailer. Under normal circumstances, transporting a fully equipped jib requires multiple trailers, which not only occupies a lot of resources but also increases transportation costs.

[0003] Patent application number CN201910517019.6 relates to the field of engineering machinery technology, and in particular to a jib and crane of a crane, comprising: a jib body, a wheel axle, and a jib head pulley assembly. The jib body has a jib head, the wheel axle is mounted on the jib head, and the jib head pulley assembly is mounted on the wheel axle. It also includes a support seat, which is fixed to the jib head to support the wheel axle. This application provides a jib and crane of a crane to solve, to a certain extent, the technical problem of stress concentration at the interface between the pulley axle and the jib head caused by wire rope deflection.

[0004] However, the crane boom in the aforementioned patented technology is inconvenient to store, fails to address the shortcomings of existing technologies, and does not provide any technical inspiration for solving existing problems. Therefore, a crane boom transportation solution that can effectively reduce transportation space and lower transportation costs is needed. Utility Model Content

[0005] The purpose of this utility model is to provide a modular crane jib mechanism to solve the problems mentioned in the background art.

[0006] (1) How to solve the problems of large space occupation and high cost of the auxiliary boom transportation in the existing technology, and how to reduce the number of trailers and improve transportation efficiency by optimizing the transportation mode of the auxiliary boom.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A modular crane jib mechanism;

[0009] It includes an extended section and a lightweight auxiliary boom, with the extended section having a telescopic space to accommodate the lightweight auxiliary boom;

[0010] The extension section is equipped with several sliding components, each including several rollers. These rollers are installed sequentially at intervals along the length of the extension section within its telescopic space, forming a sliding track that cooperates with one of the main chords in the lightweight sub-arm.

[0011] The extended section and the lightweight auxiliary boom are detachably connected by a limiting component, which includes a limiting lug, a positioning plate, and a limiting pin. The positioning plate is fixedly connected to the bottom of the telescopic space of the extended section. The limiting lug and the positioning plate are respectively provided with pin holes. The limiting pin can pass through the pin holes of the limiting lug and the positioning plate to achieve a detachable engagement between the limiting pin and the limiting lug and the positioning plate.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, a guide assembly is provided between the extended section and the lightweight auxiliary boom. The guide assembly includes at least several sets of guide wheels, and all guide wheels are installed sequentially and at intervals within the telescopic space of the extended section along the length direction of the extended section.

[0014] Furthermore, the guiding assembly also includes a guide bracket, which is fixedly connected to the bottom of the lightweight sub-arm. The guide bracket can cooperate with the guide wheel, and the movement trajectory of the guide bracket of the lightweight sub-arm after entering the telescopic space inside the extension section passes through the guide wheel.

[0015] Furthermore, the guide assembly includes two sets of guide wheels, namely a first guide wheel and a second guide wheel. The first guide wheel is located on one side of the beginning end of the telescopic space of the extension section, and the second guide wheel is located on one side of the end end of the telescopic space of the extension section.

[0016] Furthermore, the lower end face of the guide bracket is a guide contact surface that contacts the guide wheel, and a chamfered surface is provided between the guide contact surface and the two side walls of the guide bracket.

[0017] With this structure, the lightweight auxiliary boom is lifted, allowing its head to nest into the head of the extension section. During this process, when the guide bracket contacts the guide wheel, it lifts the lightweight auxiliary boom, preventing its limiting lug from colliding with the extension section. As the limiting lug passes the roller, the guide bracket disengages from the guide wheel, and the main chord of the lightweight auxiliary boom falls onto the roller. The lightweight auxiliary boom is then pushed smoothly into the extension section until the limiting lug contacts the positioning plate, inserting the limiting pin and completing the assembly.

[0018] During transportation, the assembled lightweight boom and extension section take up little space, reducing the number of trailers required and lowering transportation costs. Upon arrival at the work site, the lightweight boom can be quickly deployed without affecting its use.

[0019] The beneficial technical effects of this modular crane jib mechanism are as follows:

[0020] (1) The auxiliary boom consists of three lightweight auxiliary boom sections and three extended sections. Under normal loading and placement, it occupies a lot of space. The three lightweight auxiliary boom sections are respectively fitted into the three extended sections, which can reduce the space occupied by half.

[0021] (2) The assembly is simple and convenient. A guide bracket is welded to the lower part of the head of the lightweight auxiliary boom, and a guide wheel and roller are installed at the lower part of the front of the extension section. The lightweight auxiliary boom is suspended by four lifting rings. It is lifted so that its head is nested into the head of the extension section. When the guide bracket reaches the guide wheel of the extension section, the guide wheel lifts the lightweight auxiliary boom. After the limiting ear seat passes the roller, the guide bracket and the guide wheel separate. The main chord of the lightweight auxiliary boom presses on the roller. The lifting strap on the lifting ring of the lightweight auxiliary boom is removed. The lifting strap is fixed to the auxiliary rod at the rear end of the lightweight auxiliary boom. The lightweight auxiliary boom is lifted and sent into the extension section until it touches the positioning plate on the extension section.

[0022] (3) Safe and reliable. After the complete set is installed, the limiting ear of the lightweight auxiliary arm locks the positioning plate of the extension section. The mounting holes on the ear plate and the mounting holes on the positioning plate coincide. Insert the limiting pin to ensure that it does not detach during transportation. Attached Figure Description

[0023] Figure 1 This is one of the perspective views of the usage state of this set-type crane jib mechanism embodiment.

[0024] Figure 2 This is the second perspective view of the usage state of this set-type crane jib mechanism embodiment.

[0025] Figure 3 This is a perspective view of the extended section in an embodiment of the jib mechanism of this modular crane.

[0026] Figure 4 This is a perspective view of the lightweight jib in this embodiment of the jib mechanism of the modular crane.

[0027] Explanation of the labels in the diagram:

[0028] Extended section - 100; Telescopic space - 110; Roller - 210; Lightweight auxiliary boom - 300; Main chord - 310; Limiting lug - 410; Positioning plate - 420; Limiting pin - 430; Guide bracket - 510; First guide wheel - 521; Second guide wheel - 522. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0030] The terms “vertical,” “horizontal,” “left,” “right,” and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Please see Figures 1 to 4 .

[0033] This modular crane jib mechanism includes an extension section 100 and a lightweight jib 300. The extension section 100 has a telescopic space 110 to accommodate the lightweight jib 300.

[0034] The extension section 100 is provided with two sets of sliding components. The sliding components include two rollers 210. The two rollers 210 are installed in the telescopic space 110 of the extension section 100 at intervals along the length direction of the extension section 100. The two rollers 210 form a sliding track that cooperates with one of the main chords 310 in the lightweight auxiliary boom 300.

[0035] The extension section 100 and the lightweight auxiliary boom 300 are detachably connected by a limiting component. The limiting component includes a limiting ear 410, a positioning plate 420 and a limiting pin 430. The positioning plate 420 is fixedly connected to the bottom of the telescopic space 110 of the extension section 100. The limiting ear 410 and the positioning plate 420 are respectively provided with pin holes. The limiting pin 430 can pass through the pin holes of the limiting ear 410 and the positioning plate 420 to achieve a detachable engagement between the limiting pin 430 and the limiting ear 410 and the positioning plate 420.

[0036] A guide assembly is also provided between the extension section 100 and the lightweight auxiliary boom 300. The guide assembly includes a guide bracket 510 and two sets of guide wheels. All guide wheels are installed sequentially at intervals in the telescopic space 110 of the extension section 100 along the length direction of the extension section 100. The two sets of guide wheels are a first guide wheel 521 and a second guide wheel 522. The first guide wheel 521 is located on one side of the beginning end of the telescopic space 110 of the extension section 100, and the second guide wheel 522 is located on one side of the end end of the telescopic space 110 of the extension section 100.

[0037] The guide bracket 510 is fixedly connected to the bottom of the lightweight auxiliary boom 300. The guide bracket 510 can cooperate with the guide wheel. The lower end face of the guide bracket 510 is the guide contact surface that contacts the guide wheel. A chamfered surface is provided between the guide contact surface and the two side walls of the guide bracket 510. The movement trajectory of the guide bracket 510 of the lightweight auxiliary boom 300 after entering the telescopic space 110 inside the extension section 100 passes through the guide wheel. The guide bracket 510 can adjust the posture of the lightweight auxiliary boom 300 when entering the telescopic space 110 inside the extension section 100, ensuring that the limiting ear seat 410 of the lightweight auxiliary boom 300 is finally aligned with the positioning plate 420 of the extension section 100.

[0038] During assembly in transport mode, the lightweight auxiliary arm 300 enters from the front of the extension section 100. When the guide bracket 510 contacts the guide wheel on the extension section 100, it lifts the lightweight auxiliary arm 300 to prevent its limiting ear 410 from colliding with the roller 210 on the extension section 100. When the limiting ear 410 passes the roller 210, the guide bracket 510 and the guide wheel disengage, and the main chord 310 of the lightweight auxiliary arm 300 falls onto the roller 210. At this time, the lightweight auxiliary arm 300 is pushed smoothly into the extension section 100.

[0039] The extension section 100 is equipped with two sets of rollers 210 and guide wheels. When the center of gravity of the lightweight auxiliary boom 300 is about to reach the first guide wheel 521, the guide bracket 510 reaches the second guide wheel 522. After the lightweight auxiliary boom 300 is fully inserted into the extension section 100, its center of gravity is between the two sets of rollers 210, ensuring that the lightweight auxiliary boom 300 is stable and reliable when entering and exiting the extension section 100 and when it is fixed inside the extension.

[0040] After the lightweight auxiliary arm 300 is fully inserted into the extended arm, the limiting lug 410 of the lightweight auxiliary arm 300 contacts the positioning plate 420 on the extended section 100. At this time, the hole on the limiting lug 410 and the hole on the positioning plate 420 are aligned, and the limiting pin 430 is inserted to complete the assembly in the transport state.

[0041] The above description is only one embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the principle of the present utility model, and these should also be considered to fall within the protection scope of the present utility model.

Claims

1. A modular crane jib mechanism, characterized in that: It includes an extension section (100) and a lightweight auxiliary boom (300), the extension section (100) having a telescopic space (110) for accommodating the lightweight auxiliary boom (300); The extension section (100) is provided with several sliding components, which include several rollers (210). The rollers (210) are installed sequentially and at intervals in the telescopic space (110) of the extension section (100) along the length direction of the extension section (100). The rollers (210) form a sliding track that cooperates with one of the main chords (310) in the lightweight auxiliary boom (300). The extension section (100) and the lightweight auxiliary boom (300) are detachably connected by a limiting component. The limiting component includes a limiting ear (410), a positioning plate (420), and a limiting pin (430). The positioning plate (420) is fixedly connected to the bottom of the telescopic space (110) of the extension section (100). The limiting ear (410) and the positioning plate (420) are respectively provided with pin holes. The limiting pin (430) can pass through the pin holes of the limiting ear (410) and the positioning plate (420) to achieve a detachable engagement between the limiting pin (430) and the limiting ear (410) and the positioning plate (420).

2. The modular crane jib mechanism according to claim 1, characterized in that: A guide assembly is provided between the extension section (100) and the lightweight auxiliary boom (300). The guide assembly includes at least a number of guide wheels, and all guide wheels are installed sequentially at intervals in the telescopic space (110) of the extension section (100) along the length direction of the extension section (100).

3. The modular crane jib mechanism according to claim 2, characterized in that: The guiding assembly also includes a guide bracket (510), which is fixedly connected to the bottom of the lightweight sub-arm (300). The guide bracket (510) can cooperate with the guide wheel. The movement trajectory of the guide bracket (510) of the lightweight sub-arm (300) after entering the telescopic space (110) inside the extension section (100) passes through the guide wheel.

4. The modular crane jib mechanism according to claim 3, characterized in that: The guide assembly includes two sets of guide wheels, namely a first guide wheel (521) and a second guide wheel (522). The first guide wheel (521) is located on one side of the beginning end of the telescopic space (110) of the extension section (100), and the second guide wheel (522) is located on one side of the end end of the telescopic space (110) of the extension section (100).

5. The modular crane jib mechanism according to claim 4, characterized in that: The lower end face of the guide bracket (510) is a guide contact surface that contacts the guide wheel, and a chamfered surface is provided between the guide contact surface and the two side walls of the guide bracket (510).

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