CN220845220U - Tower crane and arm support assembly thereof - Google Patents

Abstract

The application relates to the technical field of tower cranes, and discloses a tower crane and a boom assembly thereof. The tower crane comprises a tower body and a rotary assembly arranged at the top end of the tower body, and the arm support assembly comprises a balance arm, a crane arm and a switching mechanism; the balance arm is arranged on the rotary assembly, and the top end surface of the balance arm is provided with a mounting bracket; the lifting arm is arranged above the balance arm, and the first end of the lifting arm is pivotally connected with the mounting bracket; the switching mechanism is used for driving the lifting arm to switch between a horizontal state and an inclined swing state relative to the balance arm around the mounting bracket. According to the application, the boom structure of the tower crane is optimized, the A-shaped frame in the prior art is eliminated, the boom is arranged on the mounting bracket of the balance arm, and the switching mechanism assists the tower crane in luffing, so that the luffing efficiency of the tower crane in operation is improved.

Description

Tower crane and arm support assembly thereof

Technical Field

The application belongs to the technical field of tower cranes, and particularly relates to a tower crane and a boom assembly thereof.

Background

Tower cranes are widely used in the construction industry as main transportation means for building construction. The lifting hook amplitude variation of the tower crane in the prior art is realized by changing the length of an amplitude variation rope through the movement of an amplitude variation mechanism and adjusting the elevation angle of the arm support. But the efficiency of carrying out the luffing through this kind of mode is lower to the top of current tower crane is equipped with the A frame, and the luffing rope is connected with luffing pulley through bypassing the top of A frame, thereby leads to the structure of whole tower crane comparatively complicated.

Disclosure of utility model

The application aims to provide a tower crane and a boom assembly thereof, which optimize the boom structure of the tower crane and improve the luffing efficiency of the tower crane.

In order to achieve the above object, the present application provides a boom assembly of a tower crane, the tower crane including a tower body and a rotating assembly mounted on the top end of the tower body, the boom assembly including:

the balance arm is arranged on the rotary assembly, and the top end surface of the balance arm is provided with a mounting bracket;

the lifting arm is arranged above the balance arm, and the first end of the lifting arm is pivotally connected with the mounting bracket; and

And the switching mechanism is used for driving the lifting arm to switch between a horizontal state and an inclined swing state relative to the balance arm around the mounting bracket.

In the embodiment of the application, the switching mechanism comprises an amplitude variation oil cylinder, one end of the amplitude variation oil cylinder is hinged with the bottom end of the lifting arm, and the other end of the amplitude variation oil cylinder is hinged with the balance arm or the rotary assembly.

In the embodiment of the application, one end of the balance arm is arranged corresponding to the rotary assembly, and the other end of the balance arm is provided with the balancing weight.

In an embodiment of the application, the second end of the boom is provided with a latch hook member, and the boom assembly further comprises:

The amplitude changing trolley is in sliding fit with the bottom end surface of the lifting arm; and

The amplitude variation driving assembly is used for driving the amplitude variation trolley to be unlocked or locked with the lock hook member when the crane arm is in a horizontal state or an inclined swing state.

In an embodiment of the application, the boom assembly further comprises a first hoist mounted on top of the counterweight arm, the luffing drive assembly comprising:

The pulley block is arranged in the crane boom; and

One end of the lifting steel wire rope is connected with the first winch, and the other end of the lifting steel wire rope bypasses the pulley block and is connected with a lifting hook on the luffing trolley.

In an embodiment of the application, the luffing drive assembly comprises a second winch and a luffing wire rope, wherein the second winch and the luffing wire rope are arranged in the boom, and the second winch is used for winding and unwinding the luffing wire rope so as to control the luffing trolley to move along the horizontal direction.

In the embodiment of the application, the pulley block comprises a plurality of fixed pulleys, a pulley bracket is arranged in the crane arm, and each fixed pulley is arranged on the pulley bracket.

In an embodiment of the application, at least one of the fixed pulleys is mounted inside the bottom wall of the boom and the remaining fixed pulleys are arranged inside the top wall of the boom at intervals in the length direction.

In the embodiment of the application, the top of the balance arm is provided with the supporting block near one end of the crane arm, and when the amplitude cylinder is not stressed, the supporting block can support the crane arm to keep the tower crane in a horizontal state.

In an embodiment of the application, a tower crane and boom assembly as described above are included.

Through the technical scheme, the tower crane and the arm support assembly thereof provided by the embodiment of the application have the following beneficial effects:

According to the technical scheme, the A-shaped frame is omitted, the crane boom is directly arranged on the mounting bracket of the balance arm, and the boom structure of the tower crane is optimized; and switching mechanism has still been set up and the jib loading boom is driven to the utilization switching mechanism, and when switching mechanism applys driving force to the jib loading boom, the jib loading boom is jacked this moment and is in the tilt state, and when switching mechanism did not applys driving force to the jib loading boom, the jib loading boom keeps the horizontality or resumes to the horizontality by the tilt state, and luffing efficiency of tower crane has been improved through switching mechanism assistance tower crane luffing.

Additional features and advantages of embodiments of the 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 application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain, without limitation, the embodiments of the 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 tower crane according to an embodiment of the present application;

FIG. 2 is a schematic view illustrating a tilting state of a tower crane according to an embodiment of the present application;

FIG. 3 is a schematic view showing a partial structure of a horizontal state of a tower crane according to an embodiment of the present application;

Fig. 4 is a schematic view showing a partial structure of a tilting state of a tower crane according to an embodiment of the present application.

Description of the reference numerals

1. Tower body 9 amplitude-changing trolley

2. First winch of rotary assembly 10

3. Balance arm 11 second hoist

4. Lifting steel wire rope of crane boom 12

5. Fixed pulley of mounting bracket 13

6. Luffing cylinder 14 pulley bracket

7. Counterweight 15 supporting block

8. Hook 16 hook

Detailed Description

The following describes specific embodiments of the present application in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the application, are not intended to limit the application.

The tower crane and the boom assembly thereof according to the present application are described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, in an embodiment of the present application, a boom assembly of a tower crane is provided, the tower crane includes a tower body 1 and a swing assembly 2 mounted at the top end of the tower body 1, the boom assembly includes a balance arm 3, a crane arm 4 and a switching mechanism; the balance arm 3 is arranged on the rotary assembly 2, and the top end surface of the balance arm 3 is provided with a mounting bracket 5; the lifting arm 4 is arranged above the balance arm 3, and a first end of the lifting arm 4 is pivotally connected with the mounting bracket 5; the switching mechanism is used for driving the lifting arm 4 to switch between a horizontal state and a tilting state around the mounting bracket 5 relative to the balance arm 3. The horizontal state is a flat arm state in which the boom 4 is in when the boom 4 is not subjected to the force of the switching mechanism, and the tilt swing state is a boom state in which the boom 4 can move about the pivot point when the switching mechanism applies the force to the boom 4.

When the switching mechanism does not apply acting force to the crane arm 4, the crane arm 4 is in a horizontal state, and the tower crane is supported by the mounting bracket 5; when the switching mechanism applies an acting force to the lifting arm 4 to lift the lifting arm 4, the lifting arm 4 is in an inclined swinging state, and the tower crane can lift and transport nearby cargoes. The application cancels the A-shaped frame structure, directly arranges the lifting arm 4 on the mounting bracket 5 of the balance arm 3, and assists the tower crane to carry out amplitude variation through the switching mechanism, thereby improving the amplitude variation efficiency of the tower crane.

As shown in fig. 3, the switching mechanism includes a luffing cylinder 6, and in the embodiment of the present application, the luffing cylinder 6 is installed in two ways: the two ends of the luffing cylinder 6 are respectively hinged with the bottom end of the lifting arm 4 and the balance arm 3, or the two ends of the luffing cylinder 6 are respectively hinged with the bottom end of the lifting arm 4 and the rotary assembly 2.

The luffing cylinder 6 is hinged to the balance arm 3 or the rotation assembly 2, so that the luffing cylinder 6 can play a role in driving the lifting arm 4 to switch between a horizontal state and an inclined swinging state, and further, the luffing cylinder 6 is selected as a switching mechanism, so that luffing cylinder 6 can be ensured to jack up the lifting arm 4 through extension to realize luffing of the tower crane.

In addition, in other embodiments, a plurality of luffing cylinders 6 can be arranged at the same position, and the luffing cylinders 6 can drive the crane boom 4 in a straight line at the same time, so that the running stability of the tower crane in luffing is improved.

As shown in fig. 3, in the embodiment of the present application, one end of the balance arm 3 is disposed corresponding to the swing assembly 2 and fixedly connected to the swing assembly 2, and the other end of the balance arm 3 is provided with a weight 7.

Wherein, because the jib loading boom 4 is fixed on the balance arm 3 and the arm length of the jib loading boom 4 is very long, the counterweight 7 needs to be arranged at one end deviating from the jib loading boom 4 for keeping the gravity center of the tower crane stable and ensuring that the tower crane can run safely and stably.

As shown in fig. 1 and 2, in the embodiment of the present application, the second end of the boom 4 is provided with a latch hook member 8, and the boom assembly further includes a first hoist 10, a luffing trolley 9, and a luffing drive assembly. The first hoist 10 is installed at the top of the balance arm 3; the luffing trolley 9 is in sliding fit with the bottom end surface of the lifting arm 4; when the boom 4 is in a horizontal state or an inclined swing state, the luffing driving assembly is used for driving the luffing trolley 9 to be unlocked or locked with the lock hook member 8, and a lifting hook 16 is further arranged below the luffing trolley 9.

The top end surface of the amplitude-variable trolley 9 is provided with a plug-in part, the head of the lock hook component 8 is a U-shaped plug connector which can be in plug-in fit with the plug-in part, and the amplitude-variable trolley 9 is locked and unlocked through plug-in of the plug-in part and the U-shaped plug connector. When the crane boom 4 is in an inclined swing state, the amplitude changing driving assembly drives the amplitude changing trolley 9 to be locked with the lock hook member 8, so that the amplitude changing trolley 9 can be ensured not to shake randomly due to the influence of gravity, and the lock hook member 8 effectively plays a role in fixing the amplitude changing trolley 9. When the crane boom 4 is in a horizontal state, the lock hook member 8 locked with the amplitude variation trolley 9 can be unlocked at the moment, the amplitude variation driving assembly drives the amplitude variation trolley 9 to unlock with the lock hook member 8, and the amplitude variation trolley 9 drives the lifting hook 16 to reciprocate along the length direction of the crane boom 4, so that amplitude variation movement of the lifting hook 16 is realized.

In an embodiment of the application, as shown in fig. 1, the luffing drive assembly comprises a pulley block and a hoisting cable 12. The pulley block is arranged in the crane boom 4; one end of the lifting wire rope 12 is connected with the first winch 10, and the other end bypasses the pulley block and is connected with the lifting hook 16 on the luffing trolley 9.

The first hoist 10 provides a winding and unwinding driving force for winding and unwinding the lifting wire rope 12, and the winding and unwinding of the lifting wire rope 12 can be controlled by controlling the opening or closing of the first hoist 10, so that the lifting hook 16 is effectively driven to perform lifting motion.

As shown in fig. 3, in the embodiment of the present application, the luffing drive assembly includes a second hoist 11 mounted inside the boom 4, the second hoist 11 being used to pay-off and pay-off the luffing cable to control the luffing trolley 9 to move in the horizontal direction.

The luffing steel wire rope is arranged at the bottom end of the crane boom 4, one end of the luffing steel wire rope is connected to the second winch 11, and the other end of the luffing steel wire rope is connected to the luffing trolley 9; the second winch 11 is arranged in the crane boom 4, and the second winch 11 can pull the luffing trolley 9 to move by controlling the luffing steel wire rope, so that luffing efficiency of the luffing trolley 9 driven by the luffing steel wire rope is improved. Wherein the second hoisting machine 11 is only operated when the boom 4 is in a horizontal state.

As shown in fig. 1, in the embodiment of the present application, the pulley block includes a plurality of fixed pulleys 13, and a pulley bracket 14 is provided inside the boom 4, and each fixed pulley 13 is mounted on the pulley bracket 14.

The fixed pulley 13 closest to one end of the balance arm 3 is arranged on the inclined plate connected between the two pulley brackets 14, and the purpose of the design is that the fixed pulley 13 can change the movement direction of the lifting wire rope 12, the first winch 10 can pull the lifting wire rope 12 more easily by bypassing the pulley for many times, and the fixed pulleys 13 in the other lifting arms 4 are directly arranged on the pulley brackets 14 to play a role of guiding the lifting wire rope 12.

As shown in fig. 1, in the embodiment of the present application, at least one fixed sheave 13 is mounted inside the bottom wall of the boom 4, and the remaining fixed sheaves 13 are arranged inside the top wall of the boom 4 at intervals in the length direction.

As shown in fig. 1, the end of the bottom wall of the boom 4, which is close to the mounting bracket 5, is further provided with two fixed pulleys 13, the two fixed pulleys 13 are coaxially arranged and do not interfere with each other, the lifting wire rope 12 sequentially passes through the two fixed pulleys 13 and finally is connected with the luffing trolley 9, and the two fixed pulleys 13 change the movement direction of the lifting wire rope 12 in the same way, so that the first winch 10 can drive the lifting wire rope 12 to pull the lifting hook 16 to perform lifting movement more efficiently.

Specifically, one end of the lifting wire rope 12 is fixed on the first hoist 10, the lifting wire rope 12 firstly passes through a fixed pulley 13 fixed on the leftmost side of the top wall of the crane boom 4, at this time, the moving direction of the lifting wire rope 12 is changed, then the moving direction of the lifting wire rope 12 passes through a fixed pulley 13 arranged on the bottom wall of the crane boom 4, the moving direction of the lifting wire rope 12 is changed similarly, then the lifting wire rope 12 is sequentially connected to other fixed pulleys 13 arranged on the inner side of the top wall of the crane boom 4 and finally reaches the position of a lock hook member 8 arranged at the end of the crane boom 4, and under the adjustment of the fixed pulley 13 on the lock hook member 8, the direction of the lifting wire rope 12 is changed to reach the fixed pulley 13 on the bottom wall of the crane boom 4 again through the amplitude trolley 9.

As shown in fig. 4, in the embodiment of the present application, a supporting block 15 is disposed at one end of the top of the balance arm 3 near the boom 4, and when the luffing cylinder 6 is not stressed, the supporting block 15 is used to support the boom 4 to keep the tower crane in a horizontal state. Wherein, supporting shoe 15 sets up the one end of keeping away from balancing weight 7 on balance arm 3, has set gradually first hoist engine 10 and installing support 5 from left to right along the horizontal direction between balancing weight 7 and the supporting shoe 15.

When the tower crane is in a horizontal state, the piston rod of the luffing cylinder 6 is retracted, so that the piston rod cannot apply linear driving force to the crane boom 4, the crane boom 4 is ensured to be in the horizontal state by means of the mounting bracket 5 and the supporting block 15 arranged on the balance boom 3, the crane boom 4 is ensured to be in the horizontal state by the aid of the supporting block 15, and luffing trolley 9 can be effectively ensured to normally perform luffing motion.

In addition, the application also provides a tower crane, which comprises the arm support assembly, and because the tower crane adopts all embodiments of the arm support assembly, the tower crane also has all beneficial effects brought by the arm support assembly, and detailed description is omitted here.

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 number of technical features 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" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified 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 above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

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.

While 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 (10)

1. The utility model provides a jib subassembly of tower crane, tower crane includes tower body (1) and install in gyration assembly (2) on tower body (1) top, its characterized in that, the jib subassembly includes:

The balance arm (3) is mounted on the rotary assembly (2), and a mounting bracket (5) is arranged on the top end surface of the balance arm (3);

The lifting arm (4) is arranged above the balance arm (3), and a first end of the lifting arm (4) is pivotally connected with the mounting bracket (5); and

And the switching mechanism is used for driving the lifting arm (4) to switch between a horizontal state and an inclined swing state relative to the balance arm (3) around the mounting bracket (5).

2. The boom assembly of a tower crane according to claim 1, wherein the switching mechanism comprises a luffing cylinder (6), one end of the luffing cylinder (6) is hinged with the bottom end of the boom (4), and the other end is hinged with the balance arm (3) or the slewing assembly (2).

3. Boom assembly of a tower crane according to claim 1, characterized in that one end of the balancing arm (3) is arranged in correspondence of the swivel assembly (2), the other end being provided with a balancing weight (7).

4. Boom assembly of a tower crane according to claim 1, characterized in that the second end of the boom (4) is provided with a latch hook member (8), the boom assembly further comprising:

the amplitude-variable trolley (9) is in sliding fit with the bottom end surface of the lifting arm (4); and

And the amplitude-variable driving assembly is used for driving the amplitude-variable trolley (9) to be unlocked or locked with the lock hook (8) when the lifting arm (4) is in a horizontal state or an inclined swing state.

5. The jib assembly of a tower crane according to claim 4, further comprising a first hoisting machine (10) mounted on top of the balancing arm (3), the luffing drive assembly comprising:

the pulley block is arranged in the crane arm (4); and

And one end of the lifting steel wire rope (12) is connected with the first winch (10), and the other end of the lifting steel wire rope bypasses the pulley block and is connected with a lifting hook (16) on the luffing trolley (9).

6. The boom assembly of a tower crane according to claim 4, wherein the luffing drive assembly comprises a second winch (11) and luffing cables mounted inside the boom (4), the second winch (11) being adapted to reel in the luffing cables for controlling the luffing trolley (9) to move in a horizontal direction.

7. The boom assembly of a tower crane according to claim 5, wherein the pulley block comprises a plurality of fixed pulleys (13), a pulley bracket (14) is arranged inside the boom (4), and each fixed pulley (13) is mounted on the pulley bracket (14).

8. Boom assembly of a tower crane according to claim 7, wherein at least one of said fixed pulleys (13) is mounted inside the bottom wall of said boom (4) and the remaining fixed pulleys (13) are arranged longitudinally spaced inside the top wall of said boom (4).

9. The boom assembly of a tower crane according to claim 2, characterized in that a support block (15) is arranged at the top of the balance arm (3) near one end of the boom (4), and when the luffing cylinder (6) is not stressed, the support block (15) can support the boom (4) to keep the tower crane in a horizontal state.

10. Tower crane, characterized by comprising a boom assembly according to any of claims 1-9.