Windproof braking structure for tower crane slewing mechanism

Abstract

The utility model provides a windproof braking structure for a tower crane slewing mechanism, and belongs to the technical field of tower cranes. The windproof brake structure for the tower crane slewing mechanism comprises a lower rotary table and a brake blocking mechanism, an upper rotary table is mounted at the top of the lower rotary table, a fixing ring is mounted on the surface of the upper rotary table, a connecting plate is mounted on the surface of the fixing ring, a limiting groove is formed in the top of the connecting plate, and a first mounting cylinder is mounted at the top of the lower rotary table; by arranging the brake blocking mechanism, the brake blocking mechanism can be inserted into the connecting plate after being moved, so that the upper rotary table can be conveniently blocked and braked, a rotary structure can be prevented from rotating in strong wind, a spring can be made to extrude a limiting disc, and the limiting disc is prevented from being damaged. The limiting disc drives the limiting rod to be inserted into the limiting groove, the pulling plate can drive the limiting plate to move downwards by pressing the pulling plate, and therefore the limiting rod can be separated from the limiting groove.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, and more specifically, to a windproof braking structure for a slewing mechanism of a tower crane. Background Art

[0002] The tower crane is abbreviated as a tower crane, also known as a tower crane. It is a rotary crane with a jib installed on the upper part of a tall tower body. It has a large working space and is mainly used for the vertical and horizontal transportation of materials and the installation of building components in building construction. It consists of three parts: a metal structure, a working mechanism, and an electrical system. The metal structure includes a tower body, a jib, and a base, etc. The working mechanism has four parts: hoisting, luffing, slewing, and traveling.

[0003] However, in the prior art, the slewing structure of the tower crane lacks a windproof braking structure, resulting in the upper part of the slewing structure being blown when the tower crane encounters strong winds, leading to unstable structure and prone to tipping danger. Content of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides a windproof braking structure for a slewing mechanism of a tower crane that overcomes the above technical problems or at least partially solves the above problems.

[0005] The utility model is implemented as follows:

[0006] The utility model provides a windproof braking structure for a slewing mechanism of a tower crane, including a lower turntable, an upper turntable is installed on the top of the lower turntable, a fixed ring is installed on the surface of the upper turntable, and a connecting plate is installed on the surface of the fixed ring;

[0007] A braking and blocking mechanism, the braking and blocking mechanism includes;

[0008] A limiting groove, the limiting groove is opened on the top of the connecting plate;

[0009] A first mounting cylinder, the first mounting cylinder is installed on the top of the lower turntable;

[0010] A limiting rod, the limiting rod is inserted into the top of the first mounting cylinder, and the limiting rod is inserted and matched with the limiting groove.

[0011] In a preferred embodiment, a tension spring is installed on the inner wall of the first mounting cylinder, a limiting disc is installed at the bottom of the limiting rod, and the top end of the tension spring is connected to the bottom of the limiting disc.

[0012] In a preferred embodiment, a movable groove is opened on the front surface of the first mounting cylinder, a pulling plate is installed on the surface of the limiting disc, and the pulling plate penetrates to the outside of the movable groove.

[0013] In a preferred embodiment, a second mounting cylinder is installed on the top of the lower turntable, and a plugging block is inserted into the inner wall of the second mounting cylinder. A plurality of plugging grooves are formed at the bottom of the fixing ring.

[0014] In a preferred embodiment, a spring is installed on the inner wall of the second mounting cylinder, and the top end of the spring is connected to the bottom of the plugging block. The plugging block is in plugging fit with the plugging groove.

[0015] In a preferred embodiment, a fixing plate is installed on the surface of the first mounting cylinder. A through rod is installed on the top of the fixing plate, and the top of the through rod penetrates through the pulling plate and is slidably connected to the pulling plate.

[0016] In a preferred embodiment, a connecting seat is installed on the top of the fixing plate. A rotating seat is rotatably installed on the top of the connecting seat, and a rotating plate is installed on the top of the rotating seat.

[0017] In a preferred embodiment, a fixing block is installed on the surface of the rotating plate, and a cushion block is installed on the top of the fixing block. The rotating plate is in clamping fit with the pulling plate.

[0018] The anti-wind braking structure for a tower crane slewing mechanism provided by the present utility model has the following beneficial effects:

[0019] 1. By providing a braking and blocking mechanism, after moving the braking and blocking mechanism, it can be inserted into the connecting plate, thereby facilitating the limitation of the upper turntable, and being able to block and brake when the slewing structure needs to be limited, so as to avoid the rotation of the slewing structure in strong winds.

[0020] 2. By providing a spring, a limiting disc, an activity groove and a pulling plate, the spring can squeeze the limiting disc, causing the limiting disc to drive the limiting rod to move upward, inserting the limiting rod into the limiting groove, and by pressing the pulling plate, the pulling plate can drive the limiting plate to move downward, so that the limiting rod can be separated from the limiting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is the overall three-dimensional view provided by the embodiment of the present utility model;

[0023] Figure 2 is the partial three-dimensional structural schematic diagram of the fixing ring provided by the embodiment of the present utility model;

[0024] Figure 3 Schematic diagram of the three-dimensional sectional structure of the second mounting cylinder provided by the embodiment of the present utility model;

[0025] Figure 4 Schematic diagram of the three-dimensional sectional structure of the connecting plate provided by the embodiment of the present utility model;

[0026] In the figure: 1, lower turntable; 2, upper turntable; 3, fixed ring; 4, connecting plate; 5, braking and blocking mechanism; 51, limiting groove; 52, first mounting cylinder; 53, limiting rod; 6, tension spring; 7, limiting disc; 8, moving groove; 9, pulling plate; 10, second mounting cylinder; 11, inserting block; 12, spring; 13, fixing plate; 14, through rod; 15, connecting seat; 16, rotating seat; 17, rotating plate; 18, fixing block; 19, cushion block; 20, inserting slot. Specific embodiments

[0027] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0028] Referring to Figures 1-4 , the present utility model provides a technical solution: a windproof braking structure for a tower crane slewing mechanism, including a lower turntable 1 and a braking and blocking mechanism 5. An upper turntable 2 is installed on the top of the lower turntable 1, a fixed ring 3 is installed on the surface of the upper turntable 2, and a connecting plate 4 is installed on the surface of the fixed ring 3. After moving the braking and blocking mechanism 5, it can be inserted into the connecting plate 4, so as to facilitate the limitation of the upper turntable 2, and it can block and brake when the slewing structure needs to be limited, thereby avoiding the rotation of the slewing structure in strong winds.

[0029] Referring to Figures 1-4 , in a preferred embodiment, by setting the braking and blocking mechanism 5, the braking and blocking mechanism 5 includes a limiting groove 51, a first mounting cylinder 52 and a limiting rod 53. The limiting groove 51 is opened at the top of the connecting plate 4, the first mounting cylinder 52 is installed on the top of the lower turntable 1, the limiting rod 53 is inserted into the top of the first mounting cylinder 52, and the limiting rod 53 is inserted and matched with the limiting groove 51. After the first mounting cylinder 52 is installed, the limiting rod 53 can be installed, and it is convenient to move the limiting rod 53 upward and insert it into the limiting groove 51, so that the limiting rod 53 limits the upper turntable 2, and prevents the structure on the upper turntable 2 from being blown by strong winds and causing the upper turntable 2 to rotate.

[0030] Meanwhile, a tension spring 6 is installed on the inner wall of the first mounting cylinder 52, a limit disk 7 is installed at the bottom of the limit rod 53, and the top end of the tension spring 6 is connected to the bottom of the limit disk 7. An activity slot 8 is formed on the front surface of the first mounting cylinder 52, a pulling plate 9 is installed on the surface of the limit disk 7, and the pulling plate 9 penetrates to the outside of the activity slot 8. After the pulling plate 9 is pulled, the limit disk 7 can be driven to move, so that the limit disk 7 stretches the tension spring 6, and the tension spring 6 drives the limit disk 7 and the limit rod 53 to move, so that the limit rod 53 is inserted into the limiting slot 51, and then the connecting plate 4 can be limited.

[0031] Refer to Figures 1-2 , in a preferred embodiment, a second mounting cylinder 10 is installed on the top of the lower turntable 1, and a plug-in block 11 is inserted into the inner wall of the second mounting cylinder 10. A plug-in slot 20 is formed at the bottom of the fixed ring 3, and a plurality of plug-in slots 20 are provided, so that the plug-in block 11 can be installed after the second mounting cylinder 10 is installed. A spring 12 is installed on the inner wall of the second mounting cylinder 10, and the top end of the spring 12 is connected to the bottom of the plug-in block 11. The plug-in block 11 is in plug-in fit with the plug-in slot 20, so that the spring 12 can squeeze the plug-in block 11 after installation, so that the plug-in block 11 is inserted into the plug-in slot 20, and then the fixed ring 3 can be limited. It should be noted here that an electromagnet is installed at the bottom of the plug-in block 11, and the electromagnet (not shown in the figure) can adsorb an adsorption piece (not shown in the figure) at the bottom of the inner wall of the second mounting cylinder 10 after being energized, so that the plug-in block 11 is separated from the plug-in slot 20, avoiding affecting the rotation of the upper turntable 2. When encountering a small wind, the upper turntable 2 can be limited by inserting the plug-in block 11 into the plug-in slot 20, playing a damping role.

[0032] Refer to Figures 1-4 , in a preferred embodiment, a fixing plate 13 is installed on the surface of the first mounting cylinder 52, a through rod 14 is installed on the top of the fixing plate 13, and the top of the through rod 14 penetrates through the pulling plate 9 and is slidably connected to the pulling plate 9. After the fixing plate 13 is installed, the through rod 14 can be limited, so that the through rod 14 can pass through the pulling plate 9, and then it is convenient for the through rod 14 to limit the pulling plate 9, so as to facilitate the stable movement of the pulling plate 9.

[0033] Meanwhile, a connecting seat 15 is installed on the top of the fixing plate 13. A rotating seat 16 is rotatably installed on the top of the connecting seat 15. A rotating plate 17 is installed on the top of the rotating seat 16. A fixing block 18 is installed on the surface of the rotating plate 17. A cushion block 19 is installed on the top of the fixing block 18. The rotating plate 17 is in clamping fit with the pulling plate 9, which can install the rotating seat 16 after the connecting seat 15 is installed, facilitate the installation of the rotating plate 17 on the rotating seat 16, and thus facilitate the rotation of the rotating plate 17 and the clamping of the rotating plate 17 with the pulling plate 9. After the fixing block 18 is installed, the cushion block 19 can be installed, and the cushion block 19 can support the pulling plate 9, thereby limiting the pulling plate 9 and facilitating the limiting of the upper turntable 2 by the limiting rod 53.

[0034] Specifically, the working process or working principle of the anti-wind braking structure for a tower crane slewing mechanism is as follows: When it is necessary to limit and brake the upper turntable 2 in the slewing structure, the pulling plate 9 is moved upward, so that the pulling plate 9 drives the limiting disc 7 to move upward, which can pull the tension spring 6 upward, facilitate the limiting rod 53 driven by the limiting disc 7 to be inserted into the limiting groove 51, and then facilitate the limiting of the connecting plate 4, and the upper turntable 2 can be limited through the connecting plate 4 and the fixing ring 3. After the limiting rod 53 is inserted into the limiting groove 51, the rotating plate 17 is rotated so that the rotating plate 17 is clamped to the side of the pulling plate 9. After the rotating plate 17 is rotated, the cushion block 19 can be attached to the pulling plate 9, so that the cushion block 19 and the fixing block 18 can support the pulling plate 9, prevent the tension spring 6 from pulling the limiting disc 7 and the limiting rod 53 to move downward, and thus facilitate the limitation of the upper turntable 2 and prevent the structure above the upper turntable 2 from being blown by strong wind and causing the slewing structure to rotate.

Claims

1. A windproof brake structure for a tower crane slewing mechanism, comprising a lower turntable (1), characterized in that: An upper turntable (2) is installed on the top of the lower turntable (1), a fixing ring (3) is installed on the surface of the upper turntable (2), and a connecting plate (4) is installed on the surface of the fixing ring (3); A braking and blocking mechanism (5), wherein the braking and blocking mechanism (5) comprises: A limiting groove (51), wherein the limiting groove (51) is formed on the top of the connecting plate (4); A first mounting tube (52), the first mounting tube (52) being mounted on the top of the lower turntable (1); A limiting rod (53) is inserted into the top of the first mounting tube (52), and the limiting rod (53) is inserted into and matched with the limiting groove (51).

2. A windproof brake structure for a tower crane slewing mechanism according to claim 1, characterized in that: A tension spring (6) is installed on the inner wall of the first installation tube (52), a limiting plate (7) is installed on the bottom of the limiting rod (53), and the top end of the tension spring (6) is connected to the bottom of the limiting plate (7).

3. The windproof brake structure for a tower crane slewing mechanism according to claim 2, characterized in that: A movable groove (8) is provided on the front side of the first mounting tube (52), a pulling plate (9) is installed on the surface of the limiting plate (7), and the pulling plate (9) penetrates to the outside of the movable groove (8).

4. The windproof brake structure for a tower crane slewing mechanism according to claim 1, characterized in that: A second mounting tube (10) is installed on the top of the lower turntable (1), and a plug-in block (11) is plugged into the inner wall of the second mounting tube (10). A plug-in groove (20) is provided at the bottom of the fixing ring (3), and a plurality of plug-in grooves (20) are provided.

5. The windproof brake structure for a tower crane slewing mechanism according to claim 4, characterized in that: A spring (12) is installed on the inner wall of the second installation tube (10), and the top end of the spring (12) is connected to the bottom of the plug-in block (11), and the plug-in block (11) is plug-fitted with the plug-in slot (20).

6. The windproof brake structure for a tower crane slewing mechanism according to claim 3, characterized in that: A fixing plate (13) is installed on the surface of the first mounting tube (52), a penetration rod (14) is installed on the top of the fixing plate (13), and the top of the penetration rod (14) penetrates the pulling plate (9) and is slidably connected to the pulling plate (9).

7. A windproof brake structure for a tower crane slewing mechanism according to claim 6, characterized in that: A connecting seat (15) is installed on the top of the fixed plate (13), a rotating seat (16) is rotatably installed on the top of the connecting seat (15), and a rotating plate (17) is installed on the top of the rotating seat (16).

8. The windproof brake structure for a tower crane slewing mechanism according to claim 7, characterized in that: A fixing block (18) is installed on the surface of the rotating plate (17), and a cushion block (19) is installed on the top of the fixing block (18), and the rotating plate (17) is snap-fitted with the pulling plate (9).

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