CN216038332U - Tower crane balance arm counter weight subassembly - Google Patents

Abstract

The utility model discloses a tower crane balance arm counterweight assembly which comprises a balance arm and a counterweight block arranged on the balance arm, wherein the balance arm is provided with a mounting hole, and the counterweight block is arranged on the mounting hole. The balancing weight is formed by assembling a plurality of blocks, and the arc end face is the assembling block on the outermost side to form an arc face block. The utility model has the advantages of small wind resistance and good safety.

Description

Tower crane balance arm counter weight subassembly

Technical Field

The utility model relates to the technical field of tower cranes, in particular to a counterweight of a balance arm of a tower crane.

Background

The existing tower cranes are of various types, but the main structures of the tower cranes are approximately the same, namely a plurality of tower crane units are overlapped together to form a vertical tower body, and the top of the tower body is provided with a slewing mechanism which corresponds to the slewing mechanism at the lower end of the slewing tower. The rotary tower frame is provided with a tower crane arm vertically connected with the rotary tower frame, a long arm of the rotary tower frame, which is positioned at one side of the tower frame and is provided with a hoisting trolley, is a crane arm, and a short arm of the rotary tower frame, which is positioned at the other side of the tower frame and is provided with a counterweight body, is a balance arm. The end parts of the cargo boom and the balance arm are respectively provided with a cargo boom pull rope and a balance arm pull rope which are connected with the top of the revolving tower frame, and the revolving tower frame is provided with an operation room. It has the following disadvantages: the counterweight body is fixed at the end part of the balance arm, so that the balance moment is fixed. During installation, the balancing weight is arranged in the balancing weight mounting hole of the balancing arm and is hung on the two supporting beams of the balancing arm through pin shafts inserted at the two sides of the balancing weight, and the balancing weights are fixed through cross connection of connecting plates arranged at the tops of the balancing weights. The clump weight is a cuboid structure at present, such as the utility model patent applications with the application numbers of CN201120489131.2, CN202379630U, 2011.11.30 and 2012.08.15, the counterweight block component comprises a balance arm which is provided with a counterweight hole and extends along the front-back direction, a counterweight block which is arranged in the counterweight hole of the balance arm, the left side and the right side of the balance arm are provided with support beams which are arranged in parallel, the left side wall and the right side wall of each balancing weight block are provided with lap joint parts which are in lap joint and matching with the support beams, the supporting beam is provided with a supporting part in lap joint fit with the corresponding lap joint part, at least one matching surface of each group of lap joint parts and the matching surface corresponding to the supporting part is an inclined surface or a curved surface in sliding fit with the other matching surface, and the inclined surfaces or the curved surfaces enable the acting force applied by the balancing arm to the corresponding balancing weights to be consistent with the resultant force direction of the self gravity of the balancing weights and to be obliquely downward.

However, the balance arm weight described above has the following drawbacks.

When big wind opens the gas when appearing, in order to reduce the influence of big wind-force, generally park balance arm and jib loading boom along wind-force direction, however, the balancing weight of cuboid still can have great windage to can bring the potential safety hazard for the tower crane, people do not consider in this aspect for a long time, consequently, how to reduce the balancing weight windage, be the problem that needs to consider and solve.

The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that all of the above is prior art.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model aims to provide a tower crane balance arm counterweight assembly which can effectively reduce wind resistance and improve safety.

In order to achieve the purpose, the utility model adopts the following technical scheme.

The utility model provides a tower crane balance arm counter weight subassembly, includes balance arm and the balancing weight of setting on balance arm, is provided with the mounting hole on the balance arm, and the balancing weight setting is fixed on this mounting hole, its characterized in that, the balancing weight is unanimous with the balance arm direction, and outside balancing weight side is the circular arc terminal surface.

As a further explanation of the above scheme, the balancing weight is composed of a plurality of assembled balancing weights, and the assembled balancing weight at the outermost side is an arc end face to form an arc block.

Furthermore, lifting lugs are arranged on the single combined and assembled balancing weight.

Further, the balance arm comprises a bottom plate and a guardrail, a pair of diagonal draw bars is arranged between the balance arm and the tower crane main frame, one end of the bottom plate is connected with the tower crane main frame, and the mounting hole is formed in the other end of the bottom plate.

Furthermore, a transverse hole is formed in the middle of the balancing weight, a transverse rod penetrates through the transverse hole, the length of the transverse rod is larger than the width of the mounting hole in the balancing arm, a pair of inclined plates facing the same direction are arranged on the balancing arm and correspond to the two sides of the mounting hole, and the transverse rod is placed on the inclined plates.

The utility model has the beneficial effects.

The utility model adopts the end surface of the balancing weight at the outer side as the arc end surface, thereby effectively reducing the wind resistance, avoiding the problem of bearing larger wind power under the condition of strong wind weather and improving the safety factor.

The utility model has simple structure and low cost.

Drawings

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

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a schematic view of a wind tunnel test of the circular arc counterweight and the conventional rectangular counterweight of the present invention.

Wherein: 1. balance arm, 2, balancing weight, 11, horizontal pole, 12, guardrail, 13, diagonal draw bar, 14, bottom plate, 21, circular arc terminal surface, 22, lug.

Detailed Description

The following further describes the embodiments of the present invention, so that the technical solutions and the advantages thereof of the present invention are more clear and definite. The following described embodiments are exemplary and are intended to be illustrative of the utility model, but are not to be construed as limiting the utility model.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout.

Examples are given.

As shown in figure 1, the balance arm 1 of the tower crane comprises a balance arm 1 and a balancing weight 2 arranged on the balance arm 1, wherein the balance arm 1 comprises a bottom plate 14 and a guardrail 12, a pair of diagonal draw bars 13 is arranged between the balance arm 1 and a tower crane main frame, one end of the bottom plate 14 is connected with the tower crane main frame, the other end of the bottom plate 14 is provided with a mounting hole, the balancing weight 2 is fixedly arranged on the mounting hole, the direction of the balancing weight 2 is consistent with that of the balance arm 1, and the side surface of the balancing weight 2 at the outermost side is an arc end surface 21. In this embodiment, the balancing weights 2 are formed by assembling a plurality of blocks, the assembled balancing weights on the outermost sides are arc end faces 21 to form arc blocks, lifting lugs 22 are arranged on the assembled balancing weights 2, a transverse hole is formed in the middle of each balancing weight 2, a transverse rod 11 penetrates through the transverse hole, the length of each transverse rod 11 is larger than the width of each mounting hole in the balance arm 1, a pair of inclined plates facing the same direction are arranged on the balance arm 1 and correspond to the two sides of each mounting hole, and each transverse rod 11 is arranged on each inclined plate, so that the assembled balancing weights 2 are fixed in the mounting holes under the action of a strategy and cannot move; in this embodiment, the balancing weight 2 is formed by splicing seven blocks, the front five blocks have the same length, and the two blocks at the back have smaller lengths. The reason for this is here to reduce turbulence.

It can be seen from the wind tunnel test in fig. 2 that the wind resistance of the present invention is significantly lower than that of the prior art when the weight of the present invention arranged on the left side is compared with that of the weight on the right side, so that the present invention has a higher safety factor in the weather of high wind power.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, the scope of which should be defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.

Claims (6)

1. The utility model provides a tower crane balance arm counter weight subassembly, includes balance arm and the balancing weight of setting on balance arm, is provided with the mounting hole on the balance arm, and the balancing weight setting is fixed on this mounting hole, its characterized in that, the balancing weight is unanimous with the balance arm direction, and outside balancing weight side is the circular arc terminal surface.

2. The tower crane balance arm counterweight assembly of claim 1, wherein the counterweight is assembled from a plurality of blocks, and the outermost assembled counterweight is an arc end face to form an arc block.

3. The tower crane balance arm counterweight assembly of claim 2, wherein lifting lugs are arranged on each of the combined and assembled single counterweights.

4. The tower crane balance arm counterweight assembly of claim 1 or 2, wherein the balance arm comprises a bottom plate and a guardrail, a pair of diagonal draw bars is arranged between the balance arm and the tower crane main frame, one end of the bottom plate is connected with the tower crane main frame, and the mounting hole is formed in the other end of the bottom plate.

5. The tower crane balance arm counterweight assembly of claim 4, wherein a transverse hole is formed in the middle of the counterweight block, a cross rod penetrates through the transverse hole, the length of the cross rod is greater than the width of the mounting hole in the balance arm, a pair of inclined plates facing the same direction are arranged on the balance arm and correspond to two sides of the mounting hole, and the cross rod rests on the inclined plates.

6. The tower crane balance arm counterweight assembly of claim 5 wherein said counterweight is formed from seven segments, the first five segments being of the same length and the second two segments being of progressively smaller length.

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