Crane limiting device

Abstract

The utility model relates to the technical field of cranes, in particular to a crane limiting device which comprises a crane cross beam, a sliding plate is connected to the middle of the crane cross beam in a sliding mode and is of a square structure, a telescopic groove is formed in the inner wall of the sliding plate, and a telescopic block used for positioning, locking and fixing is connected into the telescopic groove in a sliding mode. A limiting plate is fixedly connected to the upper end of the crane cross beam and is of an L-shaped structure, a mounting transverse plate is fixedly connected to the lower end face of the upper portion of the limiting plate, limiting teeth are arranged at the lower end of the mounting transverse plate and used for locking and fixing the telescopic block, a rotating groove is formed in the inner wall of the limiting plate, and a control plate is rotationally connected into the rotating groove; according to the crane limiting device, the limiting teeth and the telescopic block of the limiting device can be conveniently replaced, so that the stability of the limiting device is ensured, and a heavy object is prevented from moving when the crane transports the heavy object.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to a crane limiting device. Background Technology

[0002] Cranes are mainly used for lifting and transporting heavy objects. When a crane lifts a heavy object, it rotates and moves the object to the desired location via a moving starter. However, when the crane rotates the object, the object will move away from the crane due to centrifugal force. This causes the object to exert a pulling force on the lifting device that is greater than the object itself, requiring a limit device to control it. Otherwise, the lifted goods may be thrown out, causing a safety accident. However, if the lifted object is too heavy, the pressure and wear on the limit device will be significant. After prolonged use, the limit device may loosen, causing the object to move during lifting. Utility Model Content

[0003] The purpose of this utility model is to provide a crane limiting device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a crane limiting device, comprising a crane beam, a sliding plate slidably connected to the middle of the crane beam, the sliding plate having a U-shaped structure, a telescopic groove provided on the inner wall of the sliding plate, a telescopic block for positioning and locking being slidably connected in the telescopic groove, a connecting spring provided between the telescopic block and the telescopic groove, a limiting plate fixedly connected to the upper end of the crane beam, the limiting plate having an L-shaped structure, an mounting plate fixedly connected to the lower end face of the upper part of the limiting plate, a limiting tooth provided at the lower end of the mounting plate for locking the telescopic block, a rotating groove provided on the inner wall of the limiting plate, a control plate rotatably connected in the rotating groove, a moving block provided in the middle of the control plate for controlling the up and down movement of the telescopic block, and an electromagnet fixedly connected to the inner wall of the limiting plate.

[0005] Preferably, a snap-fit ​​plate is fixedly connected to the upper end of the limiting tooth. The snap-fit ​​plate has a U-shaped structure and is snapped into the mounting cross plate. Multiple snap-fit ​​plates abut against each other.

[0006] Preferably, the upper part of the telescopic block has a U-shaped structure, and two locking heads are fixedly connected to the upper part of the telescopic block. The two locking heads form a groove, and the limiting tooth engages in the middle of the groove.

[0007] Preferably, the rotating groove is an annular structure, the control plate is an arc-shaped structure, and a drive plate is fixedly connected to the upper end of the control plate. The drive plate is a magnetic plate and faces the electromagnet.

[0008] Preferably, the inner wall of the control panel is fixedly connected with a pressing protrusion, the width of the pressing protrusion is wider on the left and lower on the right, and the front view of the moving block is an elliptical structure.

[0009] Preferably, a traction member is fixedly connected to the side end of the movable block. The traction member has a U-shaped structure, and the lower end of the traction member is fixedly connected to the telescopic block.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: After the lifting is completed, the electromagnet is energized, thereby attracting the drive plate, causing the drive plate to drive the control plate to rotate, thereby pulling up the telescopic block. At this time, the limiting teeth and the two locking heads engage to limit and fix the sliding plate. The limiting teeth and locking heads can be quickly disassembled. When the limiting teeth and locking heads are damaged, the damaged parts can be quickly replaced. When the crane is rotating, it ensures that the crane can limit and fix the sliding plate during lifting, preventing the lifted load from moving and ensuring the safety of lifting. Attached Figure Description

[0011] Figure 1 The purpose is to train the technology of the limit device.

[0012] Figure 2 This is a schematic diagram of the three-dimensional connection between the snap-fit ​​plate and the limiting teeth.

[0013] Figure 3 This is a schematic diagram of the three-dimensional connection between the control panel and the moving block.

[0014] Figure 4 This is an enlarged view of point A.

[0015] In the diagram: 1. Crane beam, 2. Sliding plate, 3. Telescopic groove, 4. Connecting spring, 5. Limiting plate, 6. Snap-fit ​​plate, 7. Rotating groove, 8. Control plate, 9. Electromagnet, 10. Limiting tooth, 11. Mounting plate, 12. Drive plate, 13. Extrusion protrusion, 14. Moving block, 15. Traction component, 16. Telescopic block, 17. Locking head. Detailed Implementation

[0016] To enhance understanding of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described and introduced below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this utility model, not all embodiments, and are not intended to limit the embodiments in any way. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] Please see Figure 1-4This utility model provides a technical solution: a crane limiting device, including a crane beam 1, a sliding plate 2 slidably connected in the middle of the crane beam 1, the sliding plate 2 having a U-shaped structure, a telescopic groove 3 provided on the inner wall of the sliding plate 2, a telescopic block 16 for positioning and locking being slidably connected in the telescopic groove 3, a connecting spring provided between the telescopic block 16 and the telescopic groove 3, a limiting plate 5 fixedly connected to the upper end of the crane beam 1, the limiting plate 5 having an L-shaped structure, an mounting plate 11 fixedly connected to the lower end surface of the upper part of the limiting plate 5, a limiting tooth 10 provided at the lower end of the mounting plate 11, the limiting tooth 10 being used to lock and fix the telescopic block 16, a rotating groove 7 provided on the inner wall of the limiting plate 5, a control plate 8 rotatably connected in the rotating groove 7, a moving block 14 provided in the middle of the control plate 8, the moving block 14 being used to control the telescopic block 16 to move up and down, and an electromagnet 9 fixedly connected to the inner wall of the limiting plate 5.

[0018] The upper end of the limiting tooth 10 is fixedly connected to a snap-fit ​​plate 6. The snap-fit ​​plate 6 has a U-shaped structure and snaps into the mounting plate 11. Multiple snap-fit ​​plates 6 abut against each other. However, if the limiting tooth 10 is damaged, the snap-fit ​​plate 6 and the limiting tooth 10 can be replaced together to ensure that the sliding plate 2 will not move when it is limited.

[0019] The upper part of the telescopic block 16 has a U-shaped structure. Two locking heads 17 are fixedly connected to the upper part of the telescopic block 16. The two locking heads 17 form a groove, and the limiting tooth 10 is engaged in the middle of the groove. When the sliding plate moves, the limiting tooth 10 can squeeze the locking head 17, so that the telescopic block 16 can move up and down in the telescopic groove 3. The two locking heads 17 cooperate with each other to position the sliding plate 2 and the limiting tooth 10.

[0020] The rotating groove 7 has an annular structure, and the control plate 8 has an arc-shaped structure. The upper end of the control plate 8 is fixedly connected to the drive plate 12, which is a magnetic plate. The drive plate 12 faces the electromagnet 9. The inner wall of the control plate 8 is fixedly connected to the pressing protrusion 13, which is wider on the left and lower on the right. The main view of the moving block 14 is an elliptical structure. The side end of the moving block 14 is fixedly connected to the traction member 15, which has a U-shaped structure. The lower end of the traction member 15 is fixedly connected to the telescopic block 16. When it is necessary to lift and transport heavy objects, the electromagnet 9 is energized, which attracts the drive plate 12. The drive plate 12 can drive the control plate 8 to rotate, so that the pressing protrusion 13 presses the moving block 14, thereby lifting the moving block 14. The moving block 14 drives the telescopic block 16 to move upward through the traction member 15, thereby limiting and fixing the locking head 17 and the limiting tooth 10. The telescopic block 16 can move up and down for easy replacement and subsequent maintenance.

[0021] Although embodiments of the present invention have been shown and described, it should be emphasized that the above description is merely an introduction and description of the usage of the embodiments of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art will understand that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crane limiting device, comprising a crane crossbeam (1), characterized in that: The middle of the crane beam (1) is slidably connected to a sliding plate (2). The sliding plate (2) has a U-shaped structure. The inner wall of the sliding plate (2) is provided with a telescopic groove (3). The telescopic groove (3) is slidably connected to a telescopic block (16) for positioning and locking. A connecting spring is provided between the telescopic block (16) and the telescopic groove (3). The upper end of the crane beam (1) is fixedly connected to a limiting plate (5). The limiting plate (5) has an L-shaped structure. A mounting plate (11) is fixedly connected to the lower end of the upper part of the limiting plate (5). The lower end of the mounting plate (11) is provided with a limiting tooth (10). The limiting tooth (10) is used to lock and fix the telescopic block (16). The inner wall of the limiting plate (5) is provided with a rotating groove (7), and a control plate (8) is rotatably connected in the rotating groove (7). A moving block (14) is provided in the middle of the control plate (8). The moving block (14) is used to control the telescopic block (16) to move up and down. An electromagnet (9) is fixedly connected to the inner wall of the limiting plate (5).

2. The crane limiting device according to claim 1, characterized in that: The upper end of the limiting tooth (10) is fixedly connected to a snap-fit ​​plate (6). The snap-fit ​​plate (6) has a U-shaped structure. The snap-fit ​​plate (6) is snapped into the mounting plate (11). Multiple snap-fit ​​plates (6) abut against each other.

3. A crane limiting device according to claim 1, characterized in that: The upper part of the telescopic block (16) has a U-shaped structure. Two locking heads (17) are fixedly connected to the upper part of the telescopic block (16). The two locking heads (17) form a slot, and the limiting tooth (10) is engaged in the middle of the slot.

4. A crane limiting device according to claim 1, characterized in that: The rotating groove (7) is a ring structure, the control plate (8) is an arc structure, and the upper end of the control plate (8) is fixedly connected to the drive plate (12). The drive plate (12) is a magnet plate and the drive plate (12) faces the electromagnet (9).

5. A crane limiting device according to claim 1, characterized in that: The inner wall of the control panel (8) is fixedly connected to a pressing protrusion (13), the width of the pressing protrusion (13) is wider on the left and lower on the right, and the main view of the moving block (14) is an elliptical structure.

6. A crane limiting device according to claim 1, characterized in that: The side end of the movable block (14) is fixedly connected to a traction member (15), which is a U-shaped structure. The lower end of the traction member (15) is fixedly connected to the telescopic block (16).

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