Crane suspension arm

Abstract

The utility model discloses a crane jib which comprises a supporting arm, the bottom of the supporting arm is slidably connected with a lifting frame through a steel wire rope, the bottom of the lifting frame is provided with a lifting hook, and the bottom of the lifting frame is fixedly connected with a guide plate. When the lifting hook needs to be dismantled, a user only needs to pull out a plug pin and then rotate a rotating disc, the rotating disc drives an arc-shaped groove to generate offset difference through rotation of a barrel and a bearing, so that a sliding rod slides on the inner surface of the arc-shaped groove, a movable plate is driven to move, a clamping rod is driven to move through guiding of a guide plate, and the clamping rod leaves clamping of a clamping hole; when installation is needed, a vertical rod only needs to be inserted into a barrel, the vertical rod is made to be higher than a limiting base, a rotating disc is rotated reversely, the rotating disc rotates to drive a sliding rod to move, then a clamping rod connected with a movable plate is driven to be inserted into a corresponding clamping hole, and finally the top of the surface of the vertical rod is limited through a plug pin; therefore, the lifting hook is mounted.

Description

Technical Field

[0001] This utility model belongs to the field of crane technology, and in particular relates to a crane boom. Background Technology

[0002] Crane booms are an important component of cranes, used to lift and move heavy objects. Based on their structure and function, booms can be classified into various types, such as telescopic, truss, and folding booms.

[0003] The key components of a crane boom are the lifting frame and the hook. The hook and the lifting frame are usually connected by threaded rotation. However, over time, the threads may rust and become stuck, increasing the difficulty of disassembly and assembly. To facilitate the disassembly and assembly of the lifting frame and the hook, we propose a crane boom with an easy-to-disassemble hook, thus solving the aforementioned problems. Utility Model Content

[0004] The purpose of this utility model is to provide a crane boom that facilitates the disassembly and assembly of the hook, thereby solving the aforementioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A crane boom includes a support arm, a lifting frame is slidably connected to the bottom of the support arm via a wire rope, a hook is provided at the bottom of the lifting frame, a guide plate is fixedly connected to the bottom of the lifting frame, a hollow cylinder is rotatably connected to the bottom of the inner cavity of the lifting frame via a bearing seat, a turntable is fixedly connected to the bottom of the cylinder, an arc-shaped groove is opened inside the turntable, a sliding rod is slidably connected to the inner surface of the arc-shaped groove, a moving plate is fixedly connected to the bottom of the sliding rod, the top of the moving plate is slidably connected to the guide plate, a locking rod is fixedly connected to the opposite side of the moving plate, a vertical rod is fixedly connected to the top of the hook, a locking hole adapted to the locking rod is opened on the surface of the vertical rod, the vertical rod passes through the lifting frame and extends to the bottom of the inner cavity of the lifting frame, a pin is inserted at the top of the surface of the vertical rod, and a limiting seat is fixedly connected to the bottom of the inner cavity of the lifting frame.

[0006] Preferably, the top end face of the bearing seat is flush with the bottom of the inner cavity of the hanging frame, and the vertical rod passes through the limiting seat and extends to the top of the limiting seat.

[0007] Preferably, the top end face of the limiting seat has a limiting groove, the pin is located on the inner arc surface of the limiting groove, and the limiting seat is a hollow structure.

[0008] Preferably, the top of the movable plate is provided with a guide groove, and the inner surface of the guide groove is slidably connected to the surface of the guide plate.

[0009] Preferably, a limiting plate is fixedly connected to the top of the slide rod, and the bottom of the limiting plate is in close contact with the top end face of the turntable.

[0010] The beneficial effects of this utility model are:

[0011] 1. When the hook needs to be removed, simply pull out the pin and rotate the turntable. The rotation of the cylinder and bearing causes the arc groove to shift, allowing the sliding rod to slide on the inner surface of the arc groove. This moves the moving plate and guides the locking rod through the guide plate, causing it to disengage from the locking hole, thus facilitating removal. When installation is required, simply insert the vertical rod into the inside of the cylinder, ensuring it is higher than the limiting seat. Rotate the turntable in the opposite direction, causing the sliding rod to move and the locking rod connected to the moving plate to be inserted into the corresponding locking hole. Finally, the pin limits the top of the vertical rod surface, thus installing the hook. By setting the above structure, convenient disassembly and assembly can be achieved.

[0012] 2. This utility model has a limiting groove on the top end face of the limiting seat, which limits the pin and thus limits the top of the vertical rod surface.

[0013] 3. By setting a guide groove, this utility model can guide the movement of the moving plate, so that the locking rod can be inserted into the corresponding locking hole;

[0014] 4. By setting a limiting plate, this utility model can limit the position of the slide rod and prevent it from derailing. Attached Figure Description

[0015] in:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram showing the disassembly of the support arm and hook of this utility model;

[0018] Figure 3 This is a schematic diagram of the lever structure of this utility model;

[0019] Figure 4 This is a partial enlarged view of point A of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Support arm, 2. Lifting frame, 3. Lifting hook, 4. Guide plate, 5. Cylinder, 6. Turntable, 7. Arc groove, 8. Slide rod, 9. Moving plate, 10. Locking rod, 11. Vertical rod, 12. Locking hole, 13. Pin, 14. Limiting seat, 15. Guide groove. Detailed Implementation

[0022] In the following description, embodiments of the crane boom of the present invention will be described with reference to the accompanying drawings. Example 1

[0023] Figure 1-4 This invention illustrates a crane boom according to an embodiment of the present invention, comprising a support arm 1. A lifting frame 2 is slidably connected to the bottom of the support arm 1 via a wire rope. A hook 3 is provided at the bottom of the lifting frame 2. A guide plate 4 is fixedly connected to the bottom of the lifting frame 2. A hollow cylindrical body 5 is rotatably connected to the bottom of the inner cavity of the lifting frame 2 via a bearing seat. A turntable 6 is fixedly connected to the bottom of the cylindrical body 5. An arc-shaped groove 7 is formed inside the turntable 6. A sliding rod 8 is slidably connected to the inner surface of the arc-shaped groove 7. A movable plate 9 is fixedly connected to the bottom of the sliding rod 8. The top of the movable plate 9 is slidably connected to the guide plate 4. A locking rod 10 is fixedly connected to the opposite side of the movable plate 9. A vertical rod 11 is fixedly connected to the top of the hook 3. The top end face of the support is flush with the bottom of the inner cavity of the hanging frame 2. The vertical rod 11 passes through the limiting seat 14 and extends to the top of the limiting seat 14. A limiting groove is opened on the top end face of the limiting seat 14. The pin 13 is located on the inner arc surface of the limiting groove. The limiting seat 14 is a hollow structure. The limiting groove is opened on the top end face of the limiting seat 14, so that the limiting groove limits the pin 13, thereby limiting the top of the surface of the vertical rod 11. The surface of the vertical rod 11 is provided with a locking hole 12 that is compatible with the locking rod 10. The vertical rod 11 passes through the hanging frame 2 and extends to the bottom of the inner cavity of the hanging frame 2. The pin 13 is inserted at the top of the surface of the vertical rod 11. The bottom of the inner cavity of the hanging frame 2 is fixedly connected to the limiting seat 14. Example 2

[0024] Figure 1-4This invention illustrates a crane boom according to an embodiment of the present invention, comprising a support arm 1. A lifting frame 2 is slidably connected to the bottom of the support arm 1 via a wire rope. A hook 3 is provided at the bottom of the lifting frame 2. A guide plate 4 is fixedly connected to the bottom of the lifting frame 2. A hollow cylindrical body 5 is rotatably connected to the bottom of the inner cavity of the lifting frame 2 via a bearing seat. A turntable 6 is fixedly connected to the bottom of the cylindrical body 5. An arc-shaped groove 7 is formed inside the turntable 6. A sliding rod 8 is slidably connected to the inner surface of the arc-shaped groove 7. A limiting plate is fixedly connected to the top of the sliding rod 8. The bottom of the limiting plate is tightly fitted with the top end face of the turntable 6. By setting the limiting plate, the position of the sliding rod 8 can be limited to prevent derailment. A guide plate 4 is fixedly connected to the bottom of the sliding rod 8. The movable plate 9 has a guide groove 15 on its top. The inner surface of the guide groove 15 is slidably connected to the surface of the guide plate 4. By setting the guide groove 15, the movement of the movable plate 9 can be guided, so that the locking rod 10 is inserted into the corresponding locking hole 12. The top of the movable plate 9 is slidably connected to the guide plate 4. The locking rod 10 is fixedly connected to the opposite side of the movable plate 9. The top of the hook 3 is fixedly connected to the vertical rod 11. The surface of the vertical rod 11 has a locking hole 12 that is adapted to the locking rod 10 for insertion. The vertical rod 11 passes through the hanging frame 2 and extends to the bottom of the inner cavity of the hanging frame 2. The top of the surface of the vertical rod 11 has a pin 13. The bottom of the inner cavity of the hanging frame 2 is fixedly connected to the limiting seat 14.

[0025] Working principle: When using this utility model, if it is necessary to remove the hook 3, simply pull out the pin 13, then rotate the turntable 6. The rotation of the turntable 6, through the rotation of the cylinder 5 and the bearing, causes the arc groove 7 to generate a displacement difference, thereby causing the slide rod 8 to slide on the inner surface of the arc groove 7, thereby driving the moving plate 9 to move, and through the guidance of the guide plate 4, driving the locking rod 10 to move, thereby causing the locking rod 10 to leave the locking hole 12, thus achieving the purpose of easy removal. When it is necessary to install, simply insert the vertical rod 11 into the inside of the cylinder 5, so that the vertical rod 11 is higher than the limiting seat 14, and rotate the turntable 6 in the opposite direction, so that the rotation of the turntable 6 drives the slide rod 8 to move. Through the guide groove 15, the movement of the moving plate 9 can be guided, thereby causing the locking rod 10 to be inserted into the corresponding locking hole 12. Finally, the pin 13 limits the top of the surface of the vertical rod 11, thereby installing the hook 3.

Claims

1. A crane boom, comprising a support arm (1), wherein a lifting frame (2) is slidably connected to the bottom of the support arm (1) via a wire rope, and a hook (3) is provided at the bottom of the lifting frame (2), characterized in that, A guide plate (4) is fixedly connected to the bottom of the hanging frame (2). A hollow cylindrical body (5) is rotatably connected to the bottom of the inner cavity of the hanging frame (2) through a bearing seat. A turntable (6) is fixedly connected to the bottom of the cylindrical body (5). An arc groove (7) is opened inside the turntable (6). A sliding rod (8) is slidably connected to the inner surface of the arc groove (7). A moving plate (9) is fixedly connected to the bottom of the sliding rod (8). The top of the moving plate (9) slides between the guide plate (4) and the guide plate (4). The movable plate (9) is fixedly connected to a locking rod (10) on one side opposite to it. The top of the hook (3) is fixedly connected to a vertical rod (11). The surface of the vertical rod (11) is provided with a locking hole (12) that is compatible with the locking rod (10). The vertical rod (11) passes through the hanging frame (2) and extends to the bottom of the inner cavity of the hanging frame (2). The top of the surface of the vertical rod (11) is provided with a pin (13). The bottom of the inner cavity of the hanging frame (2) is fixedly connected to a limiting seat (14).

2. The crane boom according to claim 1, characterized in that, The top end face of the bearing seat is flush with the bottom of the inner cavity of the hanging frame (2), and the vertical rod (11) passes through the limiting seat (14) and extends to the top of the limiting seat (14).

3. The crane boom according to claim 2, characterized in that, The top end face of the limiting seat (14) is provided with a limiting groove, the pin (13) is located on the inner arc surface of the limiting groove, and the limiting seat (14) is a hollow structure.

4. The crane boom according to claim 1, characterized in that, The top of the movable plate (9) is provided with a guide groove (15), and the inner surface of the guide groove (15) is slidably connected to the surface of the guide plate (4).

5. The crane boom according to claim 1, characterized in that, The top of the slide bar (8) is fixedly connected to a limiting plate, and the bottom of the limiting plate is tightly fitted to the top end face of the turntable (6).

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