Mounting and positioning structure for propeller strut of crawler crane

Abstract

The utility model discloses a crawler crane propeller strut mounting and positioning structure which comprises a mounting plate, and the mounting plate is provided with a working state mounting hinge point hole, a working state fixing hole, a transportation state fixing hole and a transportation state positioning plate. According to the utility model, the mounting characteristics of a non-folding type propeller strut and a folding type propeller strut are combined, so that the propeller strut has the characteristics of a single hinge point mounting structure and also has the characteristics of a combined type mounting structure, and the problems of single mounting structure and small application range of a single lug plate are solved; and the machining precision consistency is high.

Description

Technical Field

[0001] The utility model relates to the field of crawler cranes, in particular to an installation and positioning structure for the A-frame of a crawler crane. Background Technique

[0002] A crawler crane refers to a construction machinery for lifting heavy objects, which consists of a turntable, a boom system, a luffing system and other components installed on a crawler chassis. The turntable is located above the chassis. When the crawler crane needs to perform a slewing operation, the turntable can rotate 360° relative to the lower chassis. It is equipped with other components such as a boom and an A-frame, and is a structural member welded by steel plates. The luffing system refers to a combination of a series of components that can make the crane boom perform the actions of lowering the boom - raising the boom and realize the change of the angle of the boom relative to the horizontal plane. The A-frame is a component in the luffing system and is installed on the turntable. The A-frame is a component in the luffing system, generally located in the middle and rear of the turntable, and can assist the crane in performing luffing movements. It has two states: working and transporting. When transporting, it can be folded or laid down, and corresponding structural limits and fixations are required on the turntable during transportation.

[0003] The A-frame of a crawler crane is a type of luffing structure on a crawler crane. Its structure mainly consists of two supporting members (front support and rear support) forming an angle and a top pulley block. Because its shape is similar to the Chinese character "人" (person), it is named the A-frame. When the A-frame is in the working state, it is fixed to the crane main body in a vertical state. When transporting, it needs to be laid down to reduce the height of the main body. The front support and rear support of the A-frame are connected to the installation and positioning structure on the main body at the lower hinge point during the working and transporting processes to realize the function and state stability of the A-frame during work and transportation.

[0004] There is an installation structure on the main body turntable to connect with the rear support to realize the functions of the A-frame in the working / transporting state. For the A-frame with a telescopic rear support, the installation structure is a single hinge point structure. For the folding A-frame, the installation structure is a combined structure, and the combined structure includes an installation ear plate in the working state + an installation and fixing ear plate in the transporting state. Specifically as follows:

[0005] I. The single hinge point installation structure for the rear hinge point of the A-frame. The A-frame rotates around the hinge point hole to change its form in the working / transporting state, which is applicable to the A-frame structure installed with a single hinge point. However, such a structure is single and the usage scenario is single. It is only applicable to the non-folding A-frame with a relatively small overall size. When transporting, the A-frame needs to be laid down backward. If the non-folding A-frame is too large in size, it will result in a large transportation length and occupy a large transportation space.

[0006] Second, the herringbone frame has a combined working lug plate and transport lug plate structure. The working herringbone frame is connected to the rear lug plate of the turntable and fixed to the transport lug plate during transportation. This combination structure is mainly suitable for foldable herringbone frames. Although it can be used for foldable herringbone frames, the two lug plates are separate structures and need to be welded separately before processing. This leads to poor welding accuracy and poor processing consistency.

[0007] Therefore, it is necessary to develop a new type of crawler crane A-frame mounting and positioning structure to overcome the shortcomings of the above-mentioned single hinge point mounting structure and combined mounting structure. Utility Model Content

[0008] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, the utility model provides a crawler crane A-frame mounting and positioning structure, which combines the installation characteristics of non-folding and folding A-frames, has the characteristics of both a single hinge point mounting structure and a combined mounting structure, and solves the problem of a single ear plate mounting structure being single and having a small scope of application; and has high consistency in processing precision.

[0009] Technical solution: The utility model is a crawler crane A-frame installation and positioning structure, which is characterized by comprising a mounting plate, on which are provided working state installation hinge holes, working state fixing holes, transport state fixing holes and a transport state positioning plate.

[0010] Wherein, the hinge point hole for installing in the working state is connected to the herringbone frame and the turntable through a pin shaft.

[0011] Wherein, the working state fixing hole is connected to the herringbone frame and the turntable through a pin shaft.

[0012] Wherein, the transport state fixing hole is connected to the herringbone frame and the turntable through a pin shaft.

[0013] Wherein, the transport state positioning plate limits the A-frame.

[0014] Wherein, the herringbone frame and turntable are located on the crane.

[0015] Wherein, the crane is a crawler crane.

[0016] Beneficial Effects: Compared with the existing technology, the present invention has the following significant advantages: It combines the characteristics of both non-folding and folding A-frame installations, featuring both a single-hinge installation structure and a combined installation structure, resolving the issue of a single-ear plate installation structure being limited in scope of application. The present invention is an integrated structure, with both the working and transport positions being installed, positioned, and fixed on a single mounting structure. Compared to separate welding and processing of the working and transport ear plates, multiple positioning and welding are unnecessary, reducing processing errors and achieving high processing accuracy and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the herringbone frame of the prior art;

[0018] Figure 2 A diagram of the use status of the herringbone frame of the prior art;

[0019] Figure 3 Schematic diagram of the single hinge installation structure of the prior art Figure 1 ;

[0020] Figure 4 Schematic diagram of the combined installation structure of the existing technology Figure 1 ;

[0021] Figure 5 Schematic diagram of the single hinge installation structure of the prior art Figure 2 ;

[0022] Figure 6 Schematic diagram of the combined installation structure of the existing technology Figure 2 ;

[0023] Figure 7 It is a structural diagram of the utility model;

[0024] Figure 8 This is a diagram of the use state of the utility model;

[0025] In the figure, 1 is the installation hinge hole in the working state; 2 is the fixing hole in the working state; 3 is the fixing hole in the transport state; and 4 is the positioning plate in the transport state. DETAILED DESCRIPTION

[0026] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0027] The present invention provides a Crawler Crane mounting and positioning structure comprising a mounting plate, which is provided with a working-state mounting hinge hole 1, a working-state fixing hole 2, a transport-state fixing hole 3, and a transport-state positioning plate 4. The working-state mounting hinge hole 1 connects the Crawler Crane to the turntable via a pin. The working-state fixing hole 2 connects the Crawler Crane to the turntable via a pin. The transport-state fixing hole 3 connects the Crawler Crane to the turntable via a pin. The transport-state positioning plate 4 limits the Crawler Crane. The Crawler Crane and the turntable are located on a crane. The crane is a crawler crane.

[0028] The installation structure of the present invention is a mounting plate structure consisting of three holes and a positioning plate, wherein the working state mounting point hole 1: the A-frame is connected to the turntable using a pin when working. The working state fixing hole 2: when the A-frame is in the working state, the A-frame is installed in conjunction with the working state mounting point hole 1. The transport state fixing hole 3: the fixing hole when the A-frame is in the transport state, which is a replacement hole for the working state fixing hole 2 when in the transport state, and is used to fix the A-frame during transportation. The transport state positioning plate 4: when the A-frame is in the transport state, it is used for limiting / positioning, ensuring that the hole on the A-frame coincides with the transport state fixing hole 3 on the installation structure, and is fixed by the installation pin.

[0029] When in use, in the transport state, the A-frame pull plate is connected to the working state mounting hinge hole 1 and the working state fixing hole 2 on the mounting structure. When the A-frame is switched to the transport state, the pin in the working state fixing hole 2 is pulled out, and the A-frame pull plate is rotated toward the transport state fixing hole 3 and the transport state positioning plate 4. When the A-frame reaches the position of the transport state positioning plate 4, the transport state positioning plate 4 is limited and the A-frame pull plate hole is aligned with the transport state fixing hole 3. The pulled pin is then installed in the transport state fixing hole 3 to secure the A-frame; thus, the state change is completed.

[0030] This new design combines the advantages of both non-folding and folding A-frame installations, featuring both single-hinge and combined mounting structures. It addresses the issue of single-ear plate installations being limited in scope and application. This integrated structure allows for both working and transport position installation, positioning, and fixation on a single mounting structure. Compared to separate welding and machining of working and transport ear plates, this eliminates the need for multiple positioning and welding, reducing machining errors and achieving high machining accuracy and consistency.

Claims

1. A crawler crane herringbone mounting and positioning structure, characterized by: The invention comprises a mounting plate, on which a working state mounting hinge point hole (1), a working state fixing hole (2), a transport state fixing hole (3) and a transport state positioning plate (4) are provided; the working state mounting hinge point hole (1) connects the A-frame and the turntable via a pin shaft; the working state fixing hole (2) connects the A-frame and the turntable via a pin shaft; the transport state fixing hole (3) connects the A-frame and the turntable via a pin shaft; and the transport state positioning plate (4) limits the A-frame.

2. The crawler crane herringbone mounting and positioning structure according to claim 1, characterized in that: The herringbone frame and the turntable are located on the crane.

3. The crawler crane herringbone mounting and positioning structure according to claim 2, characterized in that: The crane is a crawler crane.

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