CN219259407U

CN219259407U - Pin shaft lug plate connecting structure capable of preventing accidental loosening

Info

Publication number: CN219259407U
Application number: CN202320240571.7U
Authority: CN
Inventors: 刘勇; 米成宏; 甘一鸣; 夏文龙; 程卫东; 陈长华; 郑怀鹏
Original assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; Xuzhou Construction Machinery Group Co Ltd XCMG
Current assignee: China Railway Major Bridge Engineering Group Co Ltd MBEC; Xuzhou Construction Machinery Group Co Ltd XCMG
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-06-27
Anticipated expiration: 2033-02-17

Abstract

The utility model relates to a pin shaft lug plate connecting structure capable of preventing unexpected loosening, and belongs to the technical field of tower cranes. The lifting arm comprises a pin shaft lug plate fixed on a conversion joint, wherein the upper part of the pin shaft lug plate is provided with an open type fixing groove, a fixing hole is formed below the fixing groove, the open type fixing groove is connected with the lifting arm through a pin shaft, and the fixing hole can be connected with the lifting arm through a fixing pin shaft. The two fixing holes are arranged, and the two fixing holes are provided with fixing pin shafts when the crane boom is installed and detached. The open type fixed slot is of a U-shaped structure. The beneficial effects of the utility model are as follows: 1. when the open pin shaft lug plate ensures that the crane arm is subjected to a reaction force, the crane arm and the balance arm are integrally tilted upwards, and at the moment, the movable balance weight is subjected to the action of gravity and freely slides out of the balance arm, so that the tower crane is prevented from falling down. 2. Two fixing holes are added at the bottom of the open type pin shaft lug plate, and a fixing pin shaft can penetrate through the fixing holes during mounting and dismounting, so that accidental loosening of the pin shaft is prevented.

Description

Pin shaft lug plate connecting structure capable of preventing accidental loosening

Technical Field

The utility model relates to a pin shaft lug plate connecting structure capable of preventing unexpected loosening, and belongs to the technical field of tower cranes.

Background

When the ultra-large type tower crane faces the sudden unloading working condition, the tower crane boom can bear the reaction force caused by unloading of the heavy objects, and as the ultra-large type tower crane is heavier in counterweight and is used for hanging the heavy objects, if the ultra-large type tower crane is suddenly unloaded, the reaction force received by the boom is huge, and at the moment, the reaction force received by the boom is overlapped with the counterweight pressure received by the balance arm, so that the risk of tower inversion exists. Therefore, a novel open pin shaft lug plate needs to be designed, when the crane boom is subjected to a reaction force, the crane boom and the balance boom are enabled to be integrally tilted, and at the moment, the movable balance weight is subjected to the action of gravity and freely slides out of the balance boom, so that the tower crane is prevented from falling down. However, the open type pin shaft lug plate can only bear pressure, and the risk of unexpected loosening exists in the installation process of the tower crane, so that the pin shaft lug plate connecting structure capable of preventing unexpected loosening is designed.

The fixed pin shaft lug plates of the crane boom of the existing tower crane are shown in fig. 3, the upper ends of the fixed pin shaft lug plates are completely blocked, the pin shafts are limited to 4 azimuth degrees of freedom, when the crane faces suddenly unloaded, the counter force born by the crane boom is completely born by the pin shafts and the crane boom, at the moment, the counter force born by the crane boom is under the gravity action of devices such as a counterweight and a lifting mechanism, and the counter force born by the crane boom is overlapped with the acting force born by the counter arm, so that the load born by the tower body is aggravated, and the risk of tower tilting exists.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides the pin shaft lug plate connecting structure capable of preventing unexpected loosening, so that when the lifting arm is subjected to a reaction force, the lifting arm and the balance arm are enabled to be integrally tilted, and the tower crane is prevented from falling down.

The utility model is realized by the following technical scheme: can prevent unexpected pine's round pin axle otic placode connection structure, its characterized in that: the lifting arm comprises a pin shaft lug plate fixed on a conversion joint, wherein the upper part of the pin shaft lug plate is provided with an open type fixing groove, a fixing hole is formed below the fixing groove, the open type fixing groove is connected with the lifting arm through a pin shaft, and the fixing hole can be connected with the lifting arm through a fixing pin shaft.

The two fixing holes are arranged, and the two fixing holes are provided with fixing pin shafts when the crane boom is installed and detached.

The open type fixed slot is of a U-shaped structure.

The beneficial effects of the utility model are as follows: 1. when the open pin shaft lug plate ensures that the crane arm is subjected to a reaction force, the crane arm and the balance arm are integrally tilted upwards, and at the moment, the movable balance weight is subjected to the action of gravity and freely slides out of the balance arm, so that the tower crane is prevented from falling down.

2. Two fixing holes are added at the bottom of the open type pin shaft lug plate, and a fixing pin shaft can penetrate through the fixing holes during mounting and dismounting, so that accidental loosening of the pin shaft is prevented.

Drawings

The utility model is further described below with reference to the drawings and examples.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the pin ear plate of the present utility model;

fig. 3 is a schematic structural view of a prior art pin ear plate.

In the figure: 1. a pin ear plate; 2. a fixed pin shaft; 3. a pin shaft; 4. a conversion section; 5. a boom; 11. an open type fixing groove; 12. and a fixing hole.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

A pin ear plate connection structure capable of preventing unexpected loosening as shown in fig. 1 to 2, which is characterized in that: the lifting arm lifting device comprises a pin shaft lug plate 1 fixed on a conversion joint 4, wherein an open type fixing groove 11 is formed in the upper portion of the pin shaft lug plate 1, a fixing hole 12 is formed in the lower portion of the fixing groove 11, the open type fixing groove 11 is connected with the lifting arm 5 through a pin shaft 3, and the fixing hole 12 can be connected with the lifting arm 5 through a fixing pin shaft 2.

The two fixing holes 12 are arranged, and the two fixing holes 12 are provided with fixing pins 2 when the crane boom is installed and detached.

The open type fixing groove 11 is of a U-shaped structure.

Because the extra-large tower crane balancing weight is heavier and the hanging weight is heavy, if the crane is suddenly unloaded, the reaction force received by the crane boom 5 is huge, and at the moment, the reaction force received by the crane boom 5 is overlapped with the balancing weight pressure received by the balancing boom, so that the risk of tower falling exists. When the lifting arm 5 connected by the utility model receives a reaction force, the lifting arm 5 and the balance arm are tilted up integrally, and at the moment, the movable balance weight is free to slide out of the balance arm under the action of gravity, so that the tower crane is prevented from falling down.

In the process of installing and dismantling the tower crane, the fixed pin shaft 2 passes through the fixed hole 12, so that the pin shaft 3 at the upper part and the pin shaft ear plate 1 are always in a contact state, and accidental falling of the pin shaft 3 can be effectively prevented. When the assembly and disassembly are completed, the fixed pin shaft 2 is pulled out, the weight at the upper part of the tower crane acts on the pin shaft 3, and the pin shaft 3 is embedded in the pin shaft ear plate 1.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. Can prevent unexpected pine's round pin axle otic placode connection structure, its characterized in that: the lifting arm lifting device comprises a pin shaft lug plate (1) fixed on a conversion section (4), wherein an open type fixing groove (11) is formed in the upper portion of the pin shaft lug plate (1), a fixing hole (12) is formed in the lower portion of the fixing groove (11), the open type fixing groove (11) is connected with a lifting arm (5) through a pin shaft (3), and the fixing hole (12) can be connected with the lifting arm (5) through a fixing pin shaft (2).

2. The pin ear plate connecting structure capable of preventing accidental loosening according to claim 1, wherein: the two fixing holes (12) are arranged, and the two fixing holes (12) are provided with fixing pins (2) when the crane boom is installed and detached.

3. The pin ear plate connecting structure capable of preventing accidental loosening according to claim 1, wherein: the open type fixing groove (11) is of a U-shaped structure.