CN220787871U

CN220787871U - Tower crane

Info

Publication number: CN220787871U
Application number: CN202322752173.6U
Authority: CN
Inventors: 李桂芳; 朱守寨; 王臻
Original assignee: Zoomlion Construction Crane Co Ltd
Current assignee: Zoomlion Construction Crane Co Ltd
Priority date: 2023-10-12
Filing date: 2023-10-12
Publication date: 2024-04-16
Anticipated expiration: 2033-10-12

Abstract

The application relates to the field of engineering machinery and discloses a tower crane. The tower crane comprises a tower body, a boom assembly and an amplitude variation mechanism; the top end of the tower body is provided with a tower head; the arm support assembly comprises a balance arm and a crane arm which are respectively arranged at two ends of the tower head along the horizontal direction, and the crane arm is pivotally connected with the end part of the tower head; the luffing mechanism comprises a luffing rope and a driving assembly arranged on the balance arm, the first end of the luffing rope is connected with the driving assembly, the second end of the luffing rope is sequentially connected with the crane arm and the tower head, and the driving assembly is used for driving the luffing rope to retract and release so as to drive the crane arm to swing in a pitching mode. The tower crane has the advantages that the A-shaped frame structure of the tower crane in the prior art is canceled, the mode of installing the tower head to replace the A-shaped frame is adopted, the arm support structure of the tower crane is optimized, and the dead weight and the manufacturing cost of equipment are reduced.

Description

Tower crane

Technical Field

The application belongs to the technical field of engineering machinery, and particularly relates to a tower crane.

Background

In the tower crane, the amplitude of the crane boom is realized through the driving of an amplitude changing component, the amplitude changing rope bypasses the top end of the A-shaped frame and is connected with an amplitude changing pulley, the amplitude changing pulley is connected with the front end of the crane boom through a crane boom inhaul cable, the length of the amplitude changing rope is changed through the movement of the amplitude changing component, and the amplitude of the crane boom is adjusted so as to realize the amplitude changing of the lifting hook. However, the design can lead to the complicated installation process of the tower crane, and the A-shaped frame arranged on the tower crane is high, so that the problem of inconvenient installation due to overweight of the tower crane can occur.

Disclosure of Invention

The purpose of the application is to provide a tower crane, optimize tower crane's cantilever crane structure, improved tower crane's luffing efficiency.

To achieve the above object, an aspect of the present application provides a tower crane, including:

the top end of the tower body is provided with a tower head;

the arm support assembly comprises a balance arm and a crane arm which are respectively arranged at two ends of the tower head along the horizontal direction, and the crane arm is pivotally connected with the end part of the tower head; and

the luffing mechanism comprises a luffing rope and a driving assembly arranged on the balance arm, wherein the first end of the luffing rope is connected with the driving assembly, the second end of the luffing rope is sequentially connected with the crane arm and the tower head, and the driving assembly is used for driving the luffing rope to retract and release so as to drive the crane arm to swing in a pitching mode.

In an embodiment of the present application, the horn further comprises:

the first fixed pulley is arranged on the crane arm; and

the second fixed pulley is arranged at the top end of the tower head;

the amplitude-variable rope sequentially winds the peripheries of the first fixed pulley and the second fixed pulley.

In an embodiment of the present application, the second end of the luffing rope is connected to the second fixed sheave or the first fixed sheave.

In an embodiment of the application, the luffing mechanism further comprises a pulley bracket positioned on the top end surface of the boom, the pulley bracket is arranged close to the tower head, and the first fixed pulley is fixed on the pulley bracket.

In the embodiment of the application, the tower head is of a triangular structure.

In the embodiment of the application, the tower head is an obtuse triangle, and the balance arm is connected to the obtuse side of the obtuse triangle.

In an embodiment of the present application, the driving assembly is a hoist and is located at a top end face of the balance arm.

In an embodiment of the present application, the balance arm is rigidly connected to the tower head.

In the embodiment of the application, the balance arm is kept away from the one end of tower head still to be provided with the balancing weight.

In the embodiment of the application, a rotary assembly is further connected between the tower head and the tower body, and the rotary assembly is used for driving the tower head to rotate in the horizontal plane.

Through the technical scheme, the tower crane provided by the embodiment of the application has the following beneficial effects:

the tower crane in the application is not provided with an A-shaped frame, and is provided with a tower head on the tower body instead, and two sides of the tower head are respectively provided with a balance arm and a crane arm; one end of the luffing rope is connected to the driving assembly, the other end of the luffing rope is connected to the tower head and the crane arm, and the luffing rope is driven to retract and retract through the driving assembly, so that the crane arm can swing around the pivot point in a pitching mode. The tower crane has the advantages that the A-shaped frame arranged on the tower crane in the prior art is canceled, the A-shaped frame is replaced by a mode of installing the tower head on the tower body, the arm support structure of the tower crane is optimized, and the dead weight and the manufacturing cost of equipment are reduced. Moreover, the crane boom is driven to swing in a pitching mode directly through the cooperation of the luffing rope and the driving assembly, and luffing efficiency of the tower crane is improved.

Additional features and advantages of embodiments of the present application will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description serve to explain, without limitation, the embodiments of the present application. Other figures may be made from the structures shown in these figures without inventive effort for a person of ordinary skill in the art. In the drawings:

FIG. 1 is a schematic view of a luffing rope of a tower crane according to an embodiment of the present application in a relaxed configuration;

FIG. 2 is a schematic view of a tower crane in accordance with one embodiment of the present application with the luffing rope tightened;

FIG. 3 is a schematic view of a partial structure of a tower crane according to an embodiment of the present application with a luffing rope slackened;

fig. 4 is a schematic view of a partial structure of a tower crane according to an embodiment of the present application when the luffing rope is tightened.

Description of the reference numerals

1. Second fixed pulley of tower body 7

2. Tower head 8 driving assembly

3. Balance arm 9 pulley bracket

4. Boom 10 counterweight

5. Amplitude-variable rope 11 rotary assembly

6. First fixed pulley

Detailed Description

The following detailed description of specific embodiments of the present application refers to the accompanying drawings. It should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application.

A tower crane according to the present application is described below with reference to the accompanying drawings.

As shown in fig. 1, in an embodiment of the present application, a tower crane is provided, including a tower body 1, a boom assembly and an luffing mechanism. The top end of the tower body 1 is provided with a tower head 2; the arm support assembly comprises a balance arm 3 and a lifting arm 4 which are respectively arranged at two ends of the tower head 2 along the horizontal direction, and the lifting arm 4 is pivotally connected with the end part of the tower head 2; the luffing mechanism comprises a luffing rope 5 and a driving assembly 8 arranged on the balance arm 3, the first end of the luffing rope 5 is connected with the driving assembly 8, the second end of the luffing rope is sequentially connected with the crane arm 4 and the tower head 2, and the driving assembly 8 is used for driving the luffing rope 5 to retract and release so as to drive the crane arm 4 to swing in a pitching mode.

The movable arm tower crane has the advantages that the A-shaped frame structure of the traditional movable arm tower crane is eliminated, the dead weight of the tower crane is reduced, and the manufacturing cost is also reduced. Moreover, the first end of the luffing rope 5 is connected with the driving assembly 8, the second end of the luffing rope 5 is sequentially connected with the lifting arm 4 and the tower head 2, the luffing rope 5 is wound between the lifting arm 4 and the tower head 2, the luffing rope 5 is driven to retract and release by the driving assembly 8 in the luffing mechanism, the luffing rope 5 is controlled to pull up or put down the lifting arm 4, and luffing can be effectively carried out by the lifting arm 4 through the design, so that luffing efficiency of the tower crane is improved. The number of the luffing ropes 5 used in the present application is one.

As shown in fig. 2, in an embodiment of the present application, the horn also comprises a first fixed sheave 6 and a second fixed sheave 7. The first fixed pulley 6 is arranged on the crane arm 4; the second fixed pulley 7 is arranged at the top end of the tower head 2; the amplitude-variable rope 5 is wound around the outer circumferences of the first fixed pulley 6 and the second fixed pulley 7 in turn.

The luffing rope 5 connects the crane boom 4 with the tower head 2, and the crane boom 4 is driven to move around a pivot point by applying driving force to the luffing rope 5; wherein, the setting of first fixed pulley 6 and second fixed pulley 7 is favorable to changing the direction of motion of luffing rope 5, and has multiturn luffing rope 5 to wind to locate between first fixed pulley 6 and the second fixed pulley 7, and the drive assembly 8 of being convenient for can exert the driving force better.

As shown in fig. 3, in the embodiment of the present application, the second end of the luffing rope 5 is connected to the second fixed sheave 7 or the first fixed sheave 6.

When the number of turns of the luffing rope 5 wound between the first fixed pulley 6 and the second fixed pulley 7 is odd, the second end of the luffing rope 5 is connected to the first fixed pulley 6; when the number of turns of the luffing rope 5 wound between the first fixed pulley 6 and the second fixed pulley 7 is even, the second end of the luffing rope 5 is connected to the second fixed pulley 7, and the number of turns wound between the first fixed pulley 6 and the second fixed pulley 7 of the luffing rope 5 and the connection position of the second end of the luffing rope 5 can be reasonably selected according to the actual weight of the crane boom 4 to be pulled up when the tower crane works.

As shown in fig. 2, in the embodiment of the present application, the luffing mechanism further comprises a pulley bracket 9 located at the top end surface of the boom 4, the pulley bracket 9 being arranged close to the tower head 2, and the first fixed pulley 6 being fixed on the pulley bracket 9. The pulley bracket 9 is composed of a first inclined plate and a second inclined plate, wherein one ends of the first inclined plate and the second inclined plate are fixedly connected, the other ends of the first inclined plate and the second inclined plate are respectively welded on the crane boom 4, and a first fixed pulley 6 is arranged at the joint of the first inclined plate and the second inclined plate.

The top end face of the crane boom 4 is further provided with a pulley support 9, when the luffing rope 5 is shortened, the luffing rope 5 applies acting force to the first fixed pulley 6 on the pulley support 9 to pull the crane boom 4, the contact area between the first fixed pulley 6 and the crane boom 4 is increased by the arrangement of the pulley support 9, and the difficulty of pulling the crane boom 4 by the luffing rope 5 is reduced.

As shown in fig. 3, the tower head 2 of the present application is preferably of a triangular structure, which is because the triangular structure has a strong stability, and when the driving assembly 8 drives the luffing rope 5 to pull the boom 4, the tower head 2 of the triangular structure can bear a large pressure and is not easy to deform, so that the tower crane cannot work normally due to deformation caused by insufficient structural strength of the tower head 2 caused by compression.

Preferably, the tower head 2 is an obtuse triangle, and the balance arm 3 is connected to the obtuse side of the obtuse triangle.

Wherein, further inject tower head 2 and be obtuse triangle-shaped, wherein install balance arm 3 on the obtuse limit of tower head 2, and another obtuse limit is then connected on tower body 1, and tower head 2 leans towards one side of balance arm 3, can help balance arm 3 to maintain the balance of tower crane better.

As shown in fig. 1, in the embodiment of the present application, the driving unit 8 is a hoist and is located on the top end surface of the balance arm 3.

In this application, the driving component 8 is preferably a winch, the winch is arranged at the top end of the balance arm 3, the first end of the luffing rope 5 is wound on the winch, the winch provides driving power for winding and unwinding the luffing rope 5, under the condition that the crane arm 4 needs to be pulled up, the winch is started and continuously receives the short luffing rope 5, and then the first fixed pulley 6 is pulled to move towards one side close to the tower head 2, and the luffing efficiency of the tower crane can be further improved through the arrangement of the winch.

As shown in fig. 3, in the embodiment of the present application, the balance arm 3 is rigidly connected to the tower head 2.

When the boom 4 performs pitching motion around the hinge joint with the tower head 2, the tower head 2 will receive the pressure applied by the boom 4 at this time, but the structure of the balance arm 3 is not easy to generate relative deformation due to the rigid connection between the balance arm 3 and the tower head 2, so that the tower crane cannot work normally due to deformation of the balance arm 3 is avoided.

As shown in fig. 3, in the embodiment of the present application, the end of the balance arm 3 remote from the tower head 2 is further provided with a counterweight 10.

Wherein, the balance arm 3 and the crane arm 4 are respectively arranged at two sides of the tower head 2, and the counterweight 10 is required to be arranged on the balance arm 3 because of the longer arm length of the crane arm 4, so as to maintain the balance of the balance arm 3 and the crane arm 4 and ensure that the tower crane can work normally.

As shown in fig. 4, in the embodiment of the present application, a swing assembly 11 is further connected between the tower head 2 and the tower body 1, and the swing assembly 11 is used for driving the tower head 2 to rotate in a horizontal plane.

When the tower head 2 rotates, the balance arm 3 and the crane arm 4 connected to the tower head 2 also move along with the tower head 2, and the arrangement of the rotary assembly 11 ensures that the tower crane has a sufficient operation range and good maneuverability.

In the description of the present application, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present application. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims

1. A tower crane, comprising:

the top end of the tower body (1) is provided with a tower head (2);

the arm support assembly comprises a balance arm (3) and a lifting arm (4) which are respectively arranged at two ends of the tower head (2) along the horizontal direction, and the lifting arm (4) is pivotally connected with the end part of the tower head (2); and

the luffing mechanism comprises a luffing rope (5) and a driving assembly (8) arranged on the balance arm (3), wherein a first end of the luffing rope (5) is connected with the driving assembly (8), a second end of the luffing rope is sequentially connected with the lifting arm (4) and the tower head (2), and the driving assembly (8) is used for driving the luffing rope (5) to retract and release so as to drive the lifting arm (4) to swing in a pitching mode.

2. The tower crane of claim 1, wherein the luffing mechanism further comprises:

the first fixed pulley (6) is arranged on the lifting arm (4); and

the second fixed pulley (7) is arranged at the top end of the tower head (2);

the amplitude-variable rope (5) sequentially winds the peripheries of the first fixed pulley (6) and the second fixed pulley (7).

3. Tower crane according to claim 2, wherein the second end of the luffing rope (5) is connected to the second fixed sheave (7) or the first fixed sheave (6).

4. Tower crane according to claim 2, wherein the luffing mechanism further comprises a pulley support (9) at the top end surface of the boom (4), the pulley support (9) being arranged close to the tower head (2), the first fixed pulley (6) being fixed to the pulley support (9).

5. Tower crane according to any of claims 1-4, wherein the tower head (2) is of triangular construction.

6. Tower crane according to claim 5, wherein the tower head (2) is an obtuse triangle and the balancing arm (3) is connected at the obtuse side of the obtuse triangle.

7. Tower crane according to any of claims 1-4, wherein the drive assembly (8) is a hoisting machine and is located at the top end face of the balance arm (3).

8. Tower crane according to any of claims 1-4, wherein the balance arm (3) is rigidly connected to the tower head (2).

9. Tower crane according to any of claims 1-4, wherein the end of the balancing arm (3) remote from the tower head (2) is further provided with a counterweight (10).

10. Tower crane according to any of claims 1-4, characterized in that a swivel assembly (11) is also connected between the tower head (2) and the tower body (1), which swivel assembly (11) is adapted to drive the tower head (2) to rotate in a horizontal plane.