CN218560944U - Variable counterweight structure suitable for movable arm tower crane - Google Patents

Abstract

The utility model relates to the field of counterweights of building pendants, and provides a variable counterweight structure suitable for boom tower cranes, including a balance arm, a connecting frame, a lifting arm, a counterweight module, and a driving device. Hinged with the connecting frame, the balance arm is fixed on one side of the connecting frame, the balance arm is provided with a slope, the counterweight module is installed on the slope of the balance arm, one end of the driving device is hinged with the connecting frame, The other end of the driving device is hinged to the boom, and the counterweight module can drive the rope traction counterweight to move to the corresponding position according to the swing angle of the boom, and the design of the slope can also be used when the boom is reset. At this time, the counterweight module returns to the initial position due to its own gravity, achieving the effect of flexible counterweight.

Description

A variable counterweight structure suitable for boom tower crane

technical field

The utility model relates to the field of building suspension tower counterweights, in particular to a variable counterweight structure suitable for boom tower cranes.

Background technique

201621395248.3 discloses a moving jib tower crane with an integrated boom, including a tower body and a boom, the tower body includes a transition section at its top, the boom is an integral structure and is hinged to the transition section, Taking the articulated fulcrum between the boom and the transition section as the boundary, the boom is divided into a lifting section and a balance section, wherein a hoist trolley is slidably connected to the lifting section, and a counterweight is provided on the balance section; A luffing unit for adjusting the angle between the tower body and the boom is also connected between the transition section and the boom.

However, when the boom of the boom tower crane swings upwards, in order to achieve a better balance state for the tower crane, the counterweight structure on the balance arm should change its position according to the amplitude of the boom swinging up and down.

Therefore, the purpose of this case is to solve the above problems.

Utility model content

The purpose of this utility model is to provide a variable counterweight structure suitable for the boom tower crane. The counterweight structure is arranged on the inclined surface of the balance arm, and can drive the rope to pull the counterweight to move to the Corresponding position, and the design of the slope can also make the counterweight module return to the initial position due to its own gravity when the boom is reset, realizing the effect of variable counterweight.

In order to achieve the above object, the utility model provides the following technical solutions:

A variable counterweight structure suitable for a boom tower crane, including a balance arm, a connecting frame, a lifting arm, a counterweight module, and a driving device, the balancing arm is fixed on one side of the connecting frame, and the lifting arm One end is hinged with the connecting frame, and the driving device is used to drive the boom to rotate around the connecting frame; the balance arm is provided with a slope; the top of the balance arm slope is provided with a first fixed pulley, and the connection frame is provided with a There is a second fixed pulley, and the counterweight module is connected to the boom through a first rope that goes around the first fixed pulley and the second fixed pulley; Under the traction of a rope, it goes up the slope, and under the action of its own weight, it goes down the slope.

In the above-mentioned variable counterweight structure, a third fixed pulley is also included, and the third fixed pulley is fixed on the boom, and the first rope is wound around the first fixed pulley, the second fixed pulley, the third fixed pulley in sequence. fixed pulley and connected to the connecting frame.

In the above variable counterweight structure, the driving device is a hydraulic cylinder, one end of the hydraulic cylinder is hinged to the connecting frame, the other end of the hydraulic cylinder is hinged to the boom, and the hydraulic cylinder is connected to the boom It is fixed with the connecting frame to form a right triangle structure.

In the above-mentioned variable counterweight structure, the driving device includes a motor and a second rope, one end of the second rope is fixedly connected to the other end of the boom, and a fourth fixed pulley is arranged on the top of the connecting frame. The motor is installed on the connecting frame, and the second rope is connected with the motor by going around the fourth fixed pulley.

In the above variable counterweight structure, the connecting frame is a triangular bracket; the boom is hinged on the top of the connecting frame.

In the above variable counterweight structure, the bottom of the triangular bracket is also provided with a first connecting plate, and the boom is provided with a second connecting plate, and both the first connecting plate and the second connecting plate are A pin hole or a bolt hole is provided, and when the boom is in a horizontal state, the first connecting plate and the second connecting plate are connected by a pin or a bolt.

In the above variable counterweight structure, the connecting frame further includes a transition connecting frame, which connects the triangular support and the peripheral rotating disk; one end of the hydraulic cylinder is hinged on the transition connecting frame.

In the above variable counterweight structure, the balance arm includes a first main rod arranged horizontally and a second main rod arranged obliquely; several reinforcing connecting rods are arranged between the first main rod and the second main rod; The height of the second main rod gradually increases from the free end of the balance arm to the connecting frame.

In the above variable counterweight structure, the counterweight module includes a counterweight bin and a counterweight block placed in the counterweight bin; the counterweight bin is connected to the first rope; and the counterweight bin is slidingly fitted with the inclined plane of the balance arm.

In the above-mentioned variable counterweight structure, grooves are provided on the slope of the balance arm, and wheels matched with the grooves are provided on the counterweight bin; a limit assembly is provided on the slope of the balance arm, and the limit assembly at the end of the groove

Compared with the prior art, the beneficial effects of the utility model are:

Compared with the original counterweight structure, the new counterweight structure can drive the counterweight structure to move upward along the slope of the balance arm to the equilibrium position according to the swing of the boom. When the boom is reset to horizontal, the counterweight structure will Under the action, it goes down the slope and resets to the initial point, achieving the effect of flexible counterweight.

Description of drawings

Fig. 1 is the perspective view of the variable counterweight structure of embodiment 1;

Fig. 2 is the front view of the variable counterweight structure of embodiment 1;

Fig. 3 is the top view of the variable counterweight structure of embodiment 1;

Fig. 4 is the pulley block position diagram of the variable counterweight structure of embodiment 1;

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. . Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Example 1

Referring to Figures 1-4, a variable counterweight structure suitable for a boom tower crane includes a balance arm 2, a connecting frame 1, a lifting arm 4, a counterweight module 3, and a driving device. The balance arm 2 is fixed to the connection One side of the frame 1, one end of the boom 4 is hinged with the connecting frame 10, and the driving device is used to drive the boom to rotate around the connecting frame 1; the balance arm 2 is provided with a slope; the balance arm The top of the inclined plane is provided with a first fixed pulley 7, the connecting frame 1 is provided with a second fixed pulley 9, and the counterweight module 3 passes through the first rope 6 that goes around the first fixed pulley 7 and the second fixed pulley 9. It is connected with the boom 4; the counterweight module 3 is slidingly matched with the slope, and the counterweight module 3 goes up the slope under the traction of the first rope 6 and goes down the slope under the action of its own weight.

Under this design, the counterweight module 3 can drive the first rope 6 to move the counterweight module to the corresponding position according to the swing angle of the boom 4. The heavy module 3 returns to the initial position due to its own gravity, achieving the effect of flexible counterweight.

In this embodiment, in order to better drive the first rope 6 to pull the counterweight module 3 when the boom 4 is working, a third fixed pulley 8 is also included, and the third fixed pulley 8 is fixed together. On the heavy arm 4, the first rope 6 bypasses the first fixed pulley 7, the second fixed pulley 9, and the third fixed pulley 8 in turn and is connected to the connecting frame 1. The combination of practical multi-fixed pulleys can better change direction of force.

As a preference of this embodiment, there are two kinds of driving devices for driving the boom to swing up and down, which are:

The first type: the driving device is a hydraulic cylinder, one end of the hydraulic cylinder is hinged to the connecting frame, the other end of the hydraulic cylinder is hinged to the boom, and the hydraulic cylinder forms a right triangle with the boom and the connecting frame The structure is fixed.

The second type: the driving device includes a motor and a second rope, one end of the second rope is fixedly connected to the other end of the boom, the top of the connecting frame is provided with a fourth fixed pulley, and the motor is installed on the connecting On the frame, the second rope goes around the fourth fixed pulley and is connected with the motor.

Compared with the driving device combined with the motor and the second rope, the hydraulic cylinder has the characteristics of light weight, small size, small motion inertia, fast response, convenient operation, easy linear motion, automatic overload protection, and flexible layout. Therefore, the present embodiment decides to adopt the hydraulic cylinder 5 as the driving device of the boom.

Preferably, since a triangular structure is the most stable structure, in this embodiment, the connecting frame 1 is a triangular frame; the lifting arm 4 is hinged on the top of the connecting frame.

As a further optimization of this embodiment, in order to better protect the driving device, the bottom of the triangular bracket is also provided with a first connecting plate, and the boom 4 is provided with a second connecting plate, the first connecting plate Bolt holes or bolt holes are provided on both the connecting plate and the second connecting plate. When the boom is in a horizontal state, the first connecting plate and the second connecting plate are connected by pins or bolts. Under this design, When the boom 4 swings to a certain angle, the hydraulic cylinder 5 is the main supporting point; when the boom 4 is restored to a horizontal state, the supporting point is transferred from the hydraulic cylinder 5 to the first connecting plate and the second connecting plate, through The first connecting plate and the second connecting plate are connected by bolts or bolts, and the hydraulic cylinder 5 may not participate in the boom support work.

In this embodiment, there are two ways to connect the hydraulic cylinder:

The first type: the connecting frame also includes a transition connecting frame 10, and the transition connecting frame 10 connects the triangular support and the peripheral rotating disk; one end of the hydraulic cylinder 5 is hinged on the transition connecting frame 10, and the other end of the hydraulic cylinder 5 Hinged at the bottom of boom 4.

The second type: one end of the hydraulic cylinder 5 is hinged on the bottom of the triangular support, and the other end of the hydraulic cylinder 5 is hinged on the top of the boom.

This embodiment decides to adopt the first method.

As a preference of this embodiment, the balance arm 2 includes a first main rod arranged horizontally and a second main rod arranged obliquely; several reinforcing connecting rods are arranged between the first main rod and the second main rod; The height of the second main rod gradually increases from the free end of the balance arm to the connecting frame. Under this design, the outer surface of the balance arm is a slope structure, which can make the counterweight module reset better.

Preferably, the counterweight module 3 includes a counterweight bin and a counterweight placed in the counterweight bin; the counterweight bin is connected to the first rope; and the counterweight bin is slidingly fitted with the inclined plane of the balance arm.

Preferably, in this embodiment, in order to prevent the counterweight bin from breaking away from the balance arm 2, a groove is provided on the slope of the balance arm 2, and the way to make the counterweight bin move along the direction of the groove includes sliders and wheels. Considering The frictional force between the counterweight bin and the groove, so this embodiment decides to use wheels to make the counterweight bin move along the direction of the groove, and the counterweight bin is provided with wheels that match the groove; the inclined surface of the balance arm 2 is set There is a limit assembly, the limit assembly is located at the end of the groove, and the limit assembly can prevent the counterweight bin from breaking away from the groove when it moves.

During the installation process of the variable counterweight structure suitable for the boom tower crane in this embodiment, the steps are as follows:

Step 1: Fixedly connect the transition frame 10 with the triangular bracket 1;

Step 2: Hinge the boom 4 on the top of the triangular support 1;

Step 3: Fix the balance arm 2 on one side of the triangular bracket 1;

Step 4: Fix the first fixed pulley 7 on the highest point of the slope of the balance arm 2, fix the second fixed pulley 9 on the transition frame 10, and fix the third fixed pulley 8 on the boom 4;

Step 5: Hinge one end of the hydraulic cylinder 5 on the transition frame 10, and hinge the other end of the hydraulic cylinder 5 on the boom 4;

Step 6: Place the counterweight in the counterweight compartment, and install the counterweight compartment on the slope of the balance arm 2;

Step 7: Use one end of the first rope 6 to connect to the counterweight bin, and the other end to go around the first fixed pulley 7, the second fixed pulley 9, and the third fixed pulley 8 in turn and then fix it on the triangular support 1.

Claims (10)

1. A variable counterweight structure suitable for a movable arm tower crane comprises a balance arm, a connecting frame, a crane boom, a counterweight module and a driving device, and is characterized in that the balance arm is fixed on one side of the connecting frame, one end of the crane boom is hinged with the connecting frame, and the driving device is used for driving the crane boom to rotate around the connecting frame; the balance arm is provided with an inclined plane; the top of the inclined plane of the balance arm is provided with a first fixed pulley, the connecting frame is provided with a second fixed pulley, and the counterweight module is connected with the crane arm through a first rope which bypasses the first fixed pulley and the second fixed pulley; the counterweight module is in sliding fit with the inclined plane, and the counterweight module moves upwards along the inclined plane under the traction of the first rope and moves downwards along the inclined plane under the action of self weight.

2. The variable counterweight structure of claim 1 further comprising a third fixed sheave fixed to the boom, wherein the first rope passes around the first fixed sheave, the second fixed sheave, and the third fixed sheave in this order and is connected to the connecting frame.

3. The variable counterweight structure of claim 1 wherein the actuating device is a hydraulic cylinder, one end of the hydraulic cylinder is hinged to the connecting frame, the other end of the hydraulic cylinder is hinged to the boom, and the hydraulic cylinder forms a right-angled triangle with the boom and the connecting frame for fixing.

4. The variable counterweight structure of claim 1, wherein the driving device comprises a motor and a second rope, one end of the second rope is fixedly connected with the other end of the crane boom, a fourth fixed pulley is arranged on the top of the connecting frame, the motor is mounted on the connecting frame, and the second rope is connected with the motor by passing around the fourth fixed pulley.

5. The variable counterweight structure of claim 3 wherein the connecting frame is a triangular bracket; the cargo boom is hinged to the top of the connecting frame.

6. The variable counterweight structure of claim 5, wherein a first connecting plate is further arranged at the bottom of the triangular bracket, a second connecting plate is arranged on the crane boom, a bolt hole or a bolt hole is arranged on each of the first connecting plate and the second connecting plate, and the first connecting plate and the second connecting plate are connected through a bolt or a bolt when the crane boom is in a horizontal state.

7. The variable counterweight structure of claim 5 or 6 wherein said link frame further comprises a transitional link frame connecting said triangular bracket and an external rotating disk; one end of the hydraulic cylinder is hinged to the transition connecting frame.

8. The variable counterweight structure according to claim 1, characterized in that said balance arm includes a first main rod arranged horizontally, a second main rod arranged obliquely; a plurality of reinforcing connecting rods are arranged between the first main rod and the second main rod; the height of the second main rod gradually increases from the free end of the balance arm to the connecting frame.

9. The variable counterweight structure of claim 1 wherein said counterweight module comprises a counterweight cabin, a counterweight disposed within said counterweight cabin; the counterweight cabin is connected with a first rope; the counterweight cabin is in sliding fit with the inclined plane of the balance arm.

10. The variable counterweight structure of claim 9 wherein the sloping surface of said balance arm is provided with a groove, and said counterweight housing is provided with a wheel cooperating with the groove; and a limiting component is arranged on the inclined plane of the balance arm and is positioned at the end part of the groove.

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