Safety guard for a tower crane

Abstract

The utility model provides a kind of safety device of tower crane, including crossbeam, the both ends of crossbeam are equipped with tripod, two the upper side of two tripod is equipped with frame, two the opposite surface of two frame is rotatably installed with the auxiliary wheel matched with crane arm, two the opposite surface of two tripod is equipped with lower lug plate, the upper side of lower lug plate is equipped with upper lug plate, the upper surface of lower lug plate is evenly equipped with multiple lower perforation, the upper surface of upper lug plate is evenly equipped with multiple upper perforation aligned with lower perforation, the channel formed by upper perforation and lower perforation is inserted with stud, the upper end of stud is threadedly connected with two upper nuts on the both sides of upper perforation, the lower end of stud is threadedly connected with two lower nuts on the both sides of lower perforation, the utility model has the beneficial effects as follows: reduce the probability of moving trolley drop, improve safety.

Description

Technical Field

[0001] This utility model is a safety protection device for tower cranes, belonging to the field of tower cranes. Background Technology

[0002] The moving trolley of a tower crane is the core mechanism for achieving horizontal luffing of the boom. It is primarily used to adjust the horizontal position of the hook to accommodate lifting requirements with different operating radii. The moving trolley is equipped with wheels that roll in contact with the boom and are connected to the hook via wire ropes. During repeated lifting of heavy objects, the weight of the object is transmitted to the moving trolley through the wire ropes, subjecting the wheels and boom to continuous alternating loads. Prolonged exposure to this stress state can cause the wheels to deform and become damaged due to fatigue accumulation, leading to a failure in the connection between the moving trolley and the boom, and ultimately resulting in the object falling, posing a significant safety hazard. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a safety protection device for tower cranes to solve the problems mentioned in the background art. This utility model reduces the probability of the moving trolley falling and improves safety.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a safety protection device for a tower crane, comprising a crossbeam, with triangular frames installed at both ends of the crossbeam. Two main wheels cooperating with the boom are rotatably installed at the two corners of the upper surfaces of the two opposing triangular frames. A frame is provided on the upper side of each of the two triangular frames, and auxiliary wheels cooperating with the boom are rotatably installed on the opposing surfaces of the two frames. Lower ear plates are installed on the opposite sides of each of the two triangular frames. An upper ear plate is provided on the upper side of the lower ear plate, and the upper ear plate is connected and fixed to the frame. Multiple downward through holes are evenly distributed on the upper surface of the lower ear plate, and multiple upward through holes aligned with the downward through holes are evenly distributed on the upper surface of the upper ear plate. A stud is inserted into the channel formed by the upward and downward through holes. Two upper nuts located on both sides of the upper through holes are threaded to the upper end of the stud, and two lower nuts located on both sides of the downward through holes are threaded to the lower end of the stud.

[0005] Furthermore, a rectangular frame is installed at the middle position of the bottom of the crossbeam, and two staggered rope wheels are rotatably installed inside the rectangular frame. A steel wire rope is wound on the channel formed by the two rope wheels, and a pulley block is fitted on the steel wire rope. A hook is installed at the lower end of the pulley block.

[0006] Furthermore, two symmetrically arranged limiting plates are installed at the middle position of the upper surface of the crossbeam. The limiting plates are connected and fixed to the rectangular frame. An intermediate plate for separating the wire rope is provided between the two limiting plates. The intermediate plate is connected and fixed to the crossbeam. A shaft for limiting the range of motion of the wire rope is installed between the two limiting plates. The shaft passes through the intermediate plate.

[0007] Furthermore, two symmetrically arranged diagonal braces are installed at both ends of the rectangular frame, and the end of the diagonal brace away from the rectangular frame is connected and fixed to the crossbeam.

[0008] Furthermore, each of the two tripods is equipped with two clamping plates, and two limiting wheels that roll in contact with the side of the boom are rotatably installed between the two clamping plates in the tripod. Two rectangular openings are opened on the side of one of the clamping plates near the middle of the crossbeam in the tripod, and part of the limiting wheel passes through the rectangular opening.

[0009] Furthermore, two symmetrically arranged stiffeners are installed at both ends of the crossbeam, and the end of the stiffener away from the crossbeam is connected and fixed to the tripod.

[0010] Furthermore, multiple lower triangular plates are evenly installed on the upper surface of the lower ear plate, and the multiple lower triangular plates are alternately arranged with multiple lower through holes, and the lower triangular plates are connected and fixed to the tripod.

[0011] Furthermore, multiple upper triangular plates are evenly installed on the upper surface of the upper ear plate, and the multiple upper triangular plates are alternately arranged with multiple upper through holes, and the upper triangular plates are connected and fixed to the frame.

[0012] Furthermore, the frame has a rectangular structure, and the rotatable connection between the auxiliary wheel and the frame is installed inside the frame.

[0013] Furthermore, the auxiliary wheels are of the same specifications as the main wheels, and two auxiliary wheels on one frame are positioned between corresponding two main wheels.

[0014] The beneficial effects of this utility model are:

[0015] a. Two limit wheels are installed between the clamps inside the tripod. Part of the wheel body of the limit wheel extends through the rectangular opening and rolls in contact with the side of the boom, limiting the lateral deviation of the moving trolley, preventing the main wheel from leaving the boom track due to lateral impact, and improving the stability of operation.

[0016] b. Adjust the distance between the frame and the tripod, thereby changing the distance between the auxiliary wheel and the upper surface of the boom. Once the distance between the auxiliary wheel and the boom meets the requirements, use the upper nut to limit the relative position of the stud and the frame, and use the lower nut to limit the relative position of the stud and the tripod, so as to adjust the distance between the auxiliary wheel and the boom as needed.

[0017] c. When the main wheel is damaged and separates from the boom due to stress concentration, the auxiliary wheel moves down under the action of gravity and comes into contact with the upper surface of the boom. Thus, the auxiliary wheel plays a supporting role, preventing the moving trolley formed by the tripod, crossbeam, etc. from falling off the boom and improving safety. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a structural schematic diagram of a safety protection device for a tower crane according to the present invention;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a schematic diagram of the assembly of the lower ear plate, triangular frame and crossbeam in a safety protection device for a tower crane according to this utility model;

[0022] Figure 4 This is a schematic diagram of the assembly of the auxiliary wheel, upper ear plate and frame in a safety protection device for a tower crane according to the present invention.

[0023] In the diagram: 1-Crossbeam, 2-Diagonal brace, 3-Rectangular frame, 4-Rope pulley, 5-Wire rope, 6-Pulley block, 7-Hook, 8-Triangle frame, 9-Stick, 10-Limit wheel, 11-Clamping plate, 12-Main wheel, 13-Frame, 14-Auxiliary wheel, 15-Upper ear plate, 16-Upper nut, 17-Stud, 18-Lower nut, 19-Lower ear plate, 20-Lower triangle plate, 21-Upper triangle plate, 22-Lower through hole, 23-Limit plate, 24-Direct supply plate, 25-Shaft, 26-Upper through hole. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] Please see Figure 1 and Figure 3This utility model provides a technical solution: a safety protection device for a tower crane, including a crossbeam 1, with a triangular frame 8 installed at both ends of the crossbeam 1, and two symmetrically arranged stiffeners 9 installed at both ends of the crossbeam 1, so that the end of the stiffener 9 away from the crossbeam 1 is connected and fixed to the triangular frame 8, thereby improving the mechanical strength of the connection between the crossbeam 1 and the triangular frame 8. A rectangular frame 3 is installed at the bottom center of the crossbeam 1. Two symmetrically arranged diagonal braces 2 are installed at both ends of the rectangular frame 3. The end of the diagonal brace 2 away from the rectangular frame 3 is connected and fixed to the crossbeam 1. Two staggered rope pulleys 4 are rotatably installed inside the rectangular frame 3. A steel wire rope 5 is wound on the channel formed by the two rope pulleys 4. A pulley block 6 is fitted on the steel wire rope 5. A hook 7 is installed at the lower end of the pulley block 6. Two symmetrically arranged limiting plates 23 are installed at the center of the upper surface of the crossbeam 1. The limiting plates 23 are connected and fixed to the rectangular frame 3. An intermediate plate 24 is provided between the two limiting plates 23 to separate the steel wire rope 5. The intermediate plate 24 is connected and fixed to the crossbeam 1. A shaft 25 is installed between the two limiting plates 23 to limit the range of motion of the steel wire rope 5. The shaft 25 passes through the intermediate plate 24. The intermediate plate 24, the limiting plates 23 and the shaft 25 cooperate with each other to limit and guide the steel wire rope 5.

[0026] See Figures 1-4 Two main wheels 12, which cooperate with the boom, are rotatably installed at the two corners of the upper part of the two opposing surfaces of the two triangular frames 8. Frames 13 are provided on the upper side of the two triangular frames 8. Auxiliary wheels 14, which cooperate with the boom, are rotatably installed on the opposing surfaces of the two frames 13. The frames 13 are rectangular structures. The rotatable connection parts of the auxiliary wheels 14 and the frames 13 are installed inside the frames 13. The auxiliary wheels 14 are the same size as the main wheels 12. The two auxiliary wheels 14 on one frame 13 are set between the two corresponding main wheels 12. When the main wheels 12 are damaged due to stress concentration and separate from the boom, the auxiliary wheels 14 will move down with the frames 13 under the action of gravity and contact the upper surface of the boom to bear the weight of the moving trolley, thereby replacing the main wheels 12 to play a supporting role and preventing the moving trolley composed of the triangular frames 8, crossbeams 1, etc. from falling off the boom, thus improving safety performance.

[0027] See Figures 1-4Both tripods 8 have lower ear plates 19 installed on their back sides. Multiple lower triangle plates 20 are evenly installed on the upper surface of the lower ear plates 19. The multiple lower triangle plates 20 are alternately arranged with multiple lower through holes 22. The lower triangle plates 20 are connected and fixed to the tripods 8. An upper ear plate 15 is provided on the upper side of the lower ear plate 19. The upper ear plate 15 is connected and fixed to the frame 13. Multiple upper triangle plates 21 are evenly installed on the upper surface of the upper ear plate 15. The multiple upper triangle plates 21 are alternately arranged with multiple upper through holes 26. The upper triangle plates 21 are connected and fixed to the frame 13. Multiple lower through holes 22 are evenly opened on the upper surface of the lower ear plate 19. Multiple upper through holes 26 are evenly opened on the upper surface of the upper ear plate 15, which are aligned with the lower through holes 22. Studs 17 are inserted into the channel formed by the upper through holes 26 and the lower through holes 22. The upper end of the stud 17 is threadedly connected to two upper nuts 16 located on both sides of the upper through holes 26. The lower end of the stud 17 is threadedly connected to two lower nuts 18 located on both sides of the lower through holes 22. By adjusting the distance between frame 13 and tripod 8, the distance between the auxiliary wheel 14 and the upper surface of the boom can be changed. Once the distance reaches the required value, the upper nut 16 is used to fix the relative position of stud 17 and frame 13, while the lower nut 18 is used to fix the relative position of stud 17 and tripod 8, thereby realizing the on-demand adjustment of the distance between the auxiliary wheel 14 and the boom.

[0028] See Figure 1 and Figure 3 Each of the two triangular frames 8 contains two clamping plates 11. Between the two clamping plates 11 within the triangular frame 8 are two limiting wheels 10 that roll in contact with the side of the boom. One clamping plate 11, located near the middle of the crossbeam 1 within the triangular frame 8, has two rectangular openings on its side, through which a portion of the limiting wheel 10 passes. The two limiting wheels 10, with parts of their bodies extending through the rectangular openings and rolling in contact with the side of the boom, limit the lateral displacement of the moving trolley, preventing the main wheels 12 from detaching from the boom track due to lateral impact, thereby improving operational stability.

[0029] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A safety protection device for a tower crane, comprising a crossbeam (1), characterized in that: Both ends of the crossbeam (1) are equipped with triangular frames (8). At the two corners on the upper part of the two opposing surfaces of the two triangular frames (8), main wheels (12) cooperating with the boom are rotatably installed. Frames (13) are provided on the upper side of both triangular frames (8). Auxiliary wheels (14) cooperating with the boom are rotatably installed on the opposing surfaces of both frames (13). Lower ear plates (19) are installed on the opposite sides of both triangular frames (8). An upper ear plate (15) is provided on the upper side of the lower ear plate (19). The upper ear plate (15) and the frame (1) are connected... 3) Connection and fixation: Multiple lower through holes (22) are evenly provided on the upper surface of the lower ear plate (19), and multiple upper through holes (26) are evenly provided on the upper surface of the upper ear plate (15) that are aligned with the lower through holes (22). A stud (17) is inserted in the channel formed by the upper through hole (26) and the lower through hole (22). The upper end of the stud (17) is threaded with two upper nuts (16) located on both sides of the upper through hole (26), and the lower end of the stud (17) is threaded with two lower nuts (18) located on both sides of the lower through hole (22).

2. The safety protection device for a tower crane according to claim 1, characterized in that: A rectangular frame (3) is installed at the bottom center of the crossbeam (1). Two staggered rope wheels (4) are rotatably installed inside the rectangular frame (3). A steel wire rope (5) is wound on the channel formed by the two rope wheels (4). A pulley group (6) is fitted on the steel wire rope (5). A hook (7) is installed at the lower end of the pulley group (6).

3. A safety protection device for a tower crane according to claim 2, characterized in that: Two symmetrically arranged limiting plates (23) are installed at the middle position of the upper surface of the crossbeam (1). The limiting plates (23) are connected and fixed to the rectangular frame (3). An intermediate plate (24) for separating the wire rope (5) is provided between the two limiting plates (23). The intermediate plate (24) is connected and fixed to the crossbeam (1). A shaft (25) for limiting the range of motion of the wire rope (5) is installed between the two limiting plates (23). The shaft (25) passes through the intermediate plate (24).

4. A safety protection device for a tower crane according to claim 2, characterized in that: Two symmetrically arranged diagonal braces (2) are installed at both ends of the rectangular frame (3), and the end of the diagonal brace (2) away from the rectangular frame (3) is connected and fixed to the crossbeam (1).

5. A safety protection device for a tower crane according to claim 1, characterized in that: Two clamps (11) are installed in each of the two tripods (8). Two limiting wheels (10) that roll in contact with the side of the boom are rotatably installed between the two clamps (11) in the tripod (8). Two rectangular openings are opened on the side of one of the clamps (11) near the middle of the crossbeam (1) in the tripod (8). Part of the limiting wheel (10) passes through the rectangular opening.

6. A safety protection device for a tower crane according to claim 1, characterized in that: Two symmetrically arranged reinforcing bars (9) are installed at both ends of the crossbeam (1), and the end of the reinforcing bar (9) away from the crossbeam (1) is connected and fixed to the tripod (8).

7. A safety protection device for a tower crane according to claim 1, characterized in that: Multiple lower triangular plates (20) are evenly installed on the upper surface of the lower ear plate (19). The multiple lower triangular plates (20) are alternately arranged with multiple lower through holes (22). The lower triangular plates (20) are connected and fixed to the tripod (8).

8. A safety protection device for a tower crane according to claim 1, characterized in that: Multiple upper triangular plates (21) are evenly installed on the upper surface of the upper ear plate (15). The multiple upper triangular plates (21) and multiple upper through holes (26) are arranged alternately. The upper triangular plates (21) are connected and fixed to the frame (13).

9. A safety protection device for a tower crane according to claim 1, characterized in that: The frame (13) is a rectangular structure, and the rotating connection between the auxiliary wheel (14) and the frame (13) is installed inside the frame (13).

10. A safety protection device for a tower crane according to claim 1, characterized in that: The auxiliary wheels (14) are the same size as the main wheels (12), and two auxiliary wheels (14) on one frame (13) are set between the corresponding two main wheels (12).

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