CN220886752U

CN220886752U - Amplitude changing structure of tower crane

Info

Publication number: CN220886752U
Application number: CN202322648812.4U
Authority: CN
Inventors: 郭玉卿; 郭子阳
Original assignee: Guangdong Zhenwei Construction Machinery Co ltd
Current assignee: Guangdong Zhenwei Construction Machinery Co ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2024-05-03
Anticipated expiration: 2033-09-28

Abstract

The utility model belongs to the technical field of tower cranes, and particularly relates to a luffing structure of a tower crane, which comprises the following components: the movable amplitude changing trolley is arranged at the bottom of the movable arm, a toothed bar is arranged at the bottom of the movable arm along the moving direction of the amplitude changing trolley, a gear meshed with the toothed bar is rotatably arranged on the amplitude changing trolley, a rotating mechanism for driving the gear to rotate is further arranged on the amplitude changing trolley, the rotating mechanism comprises a reducing motor, and a limiting rod for limiting the gear to rotate is further arranged on the amplitude changing trolley.

Description

Amplitude changing structure of tower crane

Technical Field

The utility model belongs to the technical field of tower cranes, and particularly relates to a luffing structure of a tower crane.

Background

The tower crane consists of a base, a vertical rod, a cantilever crane, a balance weight, a motor, a brake, a steel wire rope, a large lifting hook, an amplitude variation structure, accessory equipment and the like.

The amplitude-changing structure is a main working mechanism of the cantilever crane type crane and is used for changing the amplitude of the crane so as to adapt to the loading and unloading of objects under different conditions, and mainly comprises a motor, a brake, a speed reducer, a steel wire rope, a winding drum and an amplitude-changing trolley, wherein the steel wire rope can break after being used for a long time, the amplitude-changing trolley can reciprocate on a cross beam, so that the lifted material shakes, the object falling condition is easy to occur, and the practicability of the equipment is greatly reduced.

Disclosure of utility model

The utility model aims to provide a luffing structure of a tower crane, which is used for solving the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a luffing structure of a tower crane, comprising: the movable arm can rotate on the tower body, a movable amplitude-variable trolley is arranged at the bottom of the movable arm, a toothed bar is arranged at the bottom of the movable arm along the moving direction of the amplitude-variable trolley, and a gear meshed with the toothed bar is rotatably arranged on the amplitude-variable trolley.

Preferably, the amplitude-variable trolley is further provided with a rotating mechanism for driving the gear to rotate, and the rotating mechanism comprises a gear motor.

Preferably, the amplitude-variable trolley is further provided with a limiting rod for limiting rotation of the gear, one side of the rotation axis of the gear is longitudinally provided with a mounting seat, the limiting rod is transversely and slidably arranged on the mounting seat, the rotation axis of the gear is provided with a limiting hole capable of accommodating the limiting rod, and one end of the limiting rod is at least partially movably inserted into the limiting hole.

Preferably, the stop lever further comprises a moving mechanism for driving the stop lever to linearly move, the moving mechanism comprises a mounting frame and an electric telescopic rod which are sequentially arranged from outside to inside, and the electric telescopic rod is arranged in the axial direction between the mounting frame and the stop lever.

Preferably, the limiting blocks are arranged at the bottoms of the two ends of the toothed bar, the thread columns are fixed at the tops of the limiting blocks, threaded holes are formed in the bottoms of the two ends of the toothed bar, and one ends of the thread columns are in threaded connection with the corresponding threaded holes.

Preferably, the amplitude changing trolley is of a U-shaped structure, moving wheels are rotatably arranged on the inner sides of two top ends of the amplitude changing trolley, and the moving wheels are arranged on the movable arms.

Compared with the prior art, the utility model has the following beneficial effects:

(1) According to the utility model, the gear and the toothed bar are additionally arranged, and the amplitude-variable trolley can reciprocate on the movable arm through the meshing of the gear and the toothed bar, so that the position of a hung object on the movable arm is adjusted by the amplitude-variable trolley, and the gear is not disconnected with the toothed bar due to the hard connection of the gear and the toothed bar.

(2) According to the utility model, through the additionally arranged limiting rod and the limiting hole, when the limiting rod is inserted into the limiting hole, the gear is prevented from rotating, so that the amplitude-variable trolley is prevented from shaking when the vehicle is stopped, a hoisted object is prevented from shaking, and meanwhile, the abrasion of the gear and the toothed bar is reduced.

Drawings

FIG. 1 is a front view of the present utility model;

FIG. 2 is a front view of the boom, luffing trolley, rack bar, gear motor and spacing mechanism of the present utility model;

FIG. 3 is a schematic illustration of the fit of the luffing trolley, gear and toothed bar of the present utility model;

FIG. 4 is a schematic diagram of the cooperation of the limiting mechanism and the gear of the present utility model;

FIG. 5 is a schematic view of the cooperation of the stopper and the toothed bar according to the present utility model;

In the figure: 1. a tower body; 2. a movable arm; 3. a luffing trolley; 4. a toothed bar; 5. a limiting block; 6. a moving wheel; 7. a limiting hole; 8. a gear; 9. a speed reducing motor; 10. a limit rod; 11. a mounting base; 12. an electric telescopic rod; 13. a mounting frame; 14. a threaded column; 15. and (3) a threaded hole.

Detailed Description

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.

Referring to fig. 1 and 3, the luffing structure of a tower crane provided by the present utility model includes: the movable arm 2 which can rotate on the tower body 1, the movable amplitude-variable trolley 3 is arranged at the bottom of the movable arm 2, the toothed bar 4 is arranged at the bottom of the movable arm 2 along the moving direction of the amplitude-variable trolley 3, and the gear 8 meshed with the toothed bar 4 is rotatably arranged on the amplitude-variable trolley 3.

In the present utility model, as shown in fig. 2, the luffing trolley 3 of the present embodiment is further provided with a rotation mechanism for driving the gear 8 to rotate, and the rotation mechanism includes a gear motor 9.

In the above, in the tower body 1, the movable arm 2, the luffing trolley 3, the toothed bar 4 and the gear 8 provided by the utility model, the luffing trolley 3 is movably arranged on the movable arm 2, the luffing trolley 3 can be driven to reciprocate on the movable arm 2 through the gear 8 and the toothed bar 4, and the gear 8 is driven by the gear motor 9, so that the gear 8 is driven to rotate, and the luffing trolley 3 is driven to reciprocate on the movable arm 2 along the toothed bar 4.

Further, in order to avoid that the gear 8 is separated from the toothed bar 4, referring to fig. 5, the bottom of two ends of the toothed bar 4 is provided with a limiting block 5, the top of the limiting block 5 is fixed with a threaded column 14, the bottom of two ends of the toothed bar 4 is provided with a threaded hole 15, and one end of the threaded column 14 is screwed into the corresponding threaded hole 15. The limiting blocks 5 are in threaded connection with corresponding threaded holes 15 through threaded columns 14, so that the gear 8 is limited on the toothed bar 4 through the two limiting blocks 5, and the gear 8 is prevented from being separated from the toothed bar 4.

Further, in order to facilitate the movement of the luffing trolley 3, referring to fig. 2, the luffing trolley 3 has a U-shaped structure, moving wheels 6 are rotatably mounted on the inner sides of two top ends of the luffing trolley 3, and the moving wheels 6 are mounted on the movable arm 2. The luffing trolley 3 is of a U-shaped structure, and the luffing trolley 3 is conveniently and movably arranged on the movable arm 2 through the movable wheel 6 through the U-shaped structure.

In the utility model, as shown in fig. 2, the amplitude-variable trolley 3 of the embodiment is also provided with a limiting rod 10 for limiting the rotation of the gear 8, one side of the rotation axis of the gear 8 is longitudinally provided with a mounting seat 11, the limiting rod 10 is transversely and slidably arranged on the mounting seat 11, the rotation axis of the gear 8 is provided with a limiting hole 7 capable of accommodating the limiting rod 10, and one end of the limiting rod 10 is at least partially movably inserted into the limiting hole 7.

In the above-mentioned manner, when the amplitude changing trolley 3 is not moving, the limit rod 10 on the mounting seat 11 is inserted into the limit hole 7 on the gear 8 to limit the rotation of the gear 8, so as to prevent the amplitude changing trolley 3 from moving on the movable arm 2.

Further, in order to facilitate the linear driving of the stop lever 10, referring to fig. 4, the stop lever 10 further includes a moving mechanism for driving the stop lever 10 to linearly move, the moving mechanism includes a mounting frame 13 and an electric telescopic rod 12 sequentially mounted from outside to inside, and the electric telescopic rod 12 is mounted in an axial direction between the mounting frame 13 and the stop lever 10. The electric telescopic rod 12 is transversely arranged on an axial extension line at one end of the limiting rod 10 through the mounting frame 13, and the electric telescopic rod 12 can drive the limiting rod 10 to reciprocate on the mounting seat 11, so that the limiting rod 10 can be conveniently inserted into the limiting hole 7 or the limiting rod 10 can be conveniently pulled out from the limiting hole 7.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A luffing structure of a tower crane, comprising: the movable arm (2) capable of rotating on the tower body (1), the movable amplitude-variable trolley (3) is arranged at the bottom of the movable arm (2), the toothed bar (4) is arranged at the bottom of the movable arm (2) along the moving direction of the amplitude-variable trolley (3), and the gear (8) meshed with the toothed bar (4) is rotatably arranged on the amplitude-variable trolley (3).

2. The luffing structure of a tower crane of claim 1, wherein: the amplitude-variable trolley (3) is also provided with a rotating mechanism for driving the gear (8) to rotate, and the rotating mechanism comprises a gear motor (9).

3. The luffing structure of a tower crane of claim 1, wherein: the amplitude-variable trolley (3) is further provided with a limiting rod (10) for limiting the rotation of the gear (8), one side of the rotation axis of the gear (8) is longitudinally provided with a mounting seat (11), the limiting rod (10) is transversely and slidably arranged on the mounting seat (11), the rotation axis of the gear (8) is provided with a limiting hole (7) capable of accommodating the limiting rod (10), and one end of the limiting rod (10) is at least partially movably inserted into the limiting hole (7).

4. A luffing structure of a tower crane as defined in claim 3, wherein: the limiting rod (10) further comprises a moving mechanism used for driving the limiting rod (10) to linearly move, the moving mechanism comprises a mounting frame (13) and an electric telescopic rod (12) which are sequentially arranged from outside to inside, and the electric telescopic rod (12) is arranged in the axial direction between the mounting frame (13) and the limiting rod (10).

5. The luffing structure of a tower crane of claim 1, wherein: limiting blocks (5) are arranged at the bottoms of two ends of the toothed bar (4), threaded columns (14) are fixed at the tops of the limiting blocks (5), threaded holes (15) are formed in the bottoms of two ends of the toothed bar (4), and one ends of the threaded columns (14) are in threaded connection with the corresponding threaded holes (15).

6. The luffing structure of a tower crane of claim 1, wherein: the luffing trolley (3) is of a U-shaped structure, moving wheels (6) are rotatably arranged on the inner sides of two top ends of the luffing trolley (3), and the moving wheels (6) are arranged on the movable arm (2).