Automatic unhooking device of crane

Abstract

The utility model relates to the technical field of mechanical engineering, in particular to an automatic unhooking device of a crane, which comprises a connecting frame, the lower surface of the connecting frame is fixedly connected with a mounting frame, the upper surface of the inner side wall of the mounting frame is fixedly provided with a motor, and the output shaft end of the motor is fixedly connected with a rotating shaft. And the outer side wall of the rotating shaft is fixedly connected with a driving bevel gear. The starting motor drives the rotating shaft and the driving bevel gear to rotate, the driven bevel gear drives the two-way screw rod to rotate, and the first nut block and the second nut block are driven to get away from or get close to each other, so that the first connecting rod and the second connecting rod get away from or get close to each other, and the first lifting hook and the second lifting hook are driven to get away from or get close to each other; the device can be automatically connected with or separated from an object, when some objects are large in size and heavy in weight, the danger of manual operation is avoided, workers can be effectively prevented from being injured, and operation is safer.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical engineering, in particular to an automatic unhooking device for a crane. Background Art

[0002] Cranes are multi-action lifting machines that can lift and move heavy objects vertically and horizontally within a certain range. Cranes are widely used in the market. They can be used in a variety of environments, including construction sites, factories, warehouses, etc. Crane hooks are an important part of cranes. They are used to connect and fix the objects to be lifted so that the crane can lift and move them.

[0003] At present, in the process of using crane hooks, workers usually connect or separate the hooks with objects manually. Since some objects are large in size and heavy in weight, there is a certain danger when connecting or separating such objects, which may cause injuries to workers and pose a safety hazard in operation. Therefore, an automatic unhooking device for crane is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic unhooking device for a crane to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic unhooking device for a crane comprises a connecting frame, the lower surface of the connecting frame is fixedly connected to a mounting frame, the upper surface of the inner side wall of the mounting frame is fixedly installed with a motor, the output shaft end of the motor is fixedly connected to a rotating shaft, the outer side wall of the rotating shaft is fixedly connected to a driving bevel gear, the inner side wall of the mounting frame is rotatably connected to a bidirectional screw rod through a bearing, the outer side wall of the bidirectional screw rod is fixedly connected to a driven bevel gear, the driven bevel gear and the driving bevel gear are meshed and connected, the outer side wall of the bidirectional screw rod is provided with two sections of external threads in opposite directions, the two sections of external threads are respectively threadedly connected with a first nut block and a second nut block, the lower surface of the first nut block is fixedly connected to a first connecting rod, the lower surface of the first connecting rod is fixedly connected to a first hook, the lower surface of the second nut block is fixedly connected to a second connecting rod, and the lower surface of the second connecting rod is fixedly connected to a second hook.

[0006] As a further preferred embodiment of the present technical solution: the inner side wall of the connecting frame is rotatably connected to a pulley via a bearing.

[0007] As a further preferred embodiment of the technical solution: two directional rods are welded to the inner wall of the mounting frame, the outer wall of the directional rod is slidably connected to the first nut block, and the outer wall of the directional rod is slidably connected to the second nut block.

[0008] As a further preferred embodiment of the present technical solution: a reinforcing rib is fixedly connected to the left side wall of the second hook, a reinforcing groove is opened on the right surface of the first hook, and an inner side wall of the reinforcing groove is slidably connected to an outer side wall of the reinforcing rib.

[0009] As a further preferred embodiment of the present technical solution: a wire groove is provided on the outer side wall of the pulley.

[0010] As a further preferred embodiment of the present technical solution: raised strips are welded to the outer side walls of the first hook and the second hook.

[0011] As a further preferred embodiment of the present technical solution: an operation indicator board is fixedly connected to the front surface of the connecting frame.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model starts a motor to drive the rotating shaft and the active bevel gear to rotate, and the driven bevel gear meshing with the active bevel gear drives the bidirectional lead screw to rotate, and the two sections of threads on the bidirectional lead screw drive the first nut block and the second nut block to move away from or approach each other, so that the first connecting rod and the second connecting rod move away from or approach each other, and drive the first hook and the second hook to move away from or approach each other. When the first hook and the second hook pass through the lifting ears of the object and engage with each other, the connection between the object and the device is completed, and when the first hook and the second hook are completely separated and detached from the lifting ears, the separation of the object and the device is completed. The connection or separation of the device and the object can be automatically realized. When some objects are relatively large in size and heavy in weight, the danger of manual operation is avoided, and the injury of staff can be effectively prevented, and the operation is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the mounting frame in the utility model;

[0016] Figure 3 It is a structural schematic diagram of the driving bevel gear and the driven bevel gear in the utility model;

[0017] Figure 4 It is a schematic cross-sectional structure diagram of the first hook and the second hook in the utility model.

[0018] In the figure: 1. connecting frame; 2. mounting frame; 3. motor; 4. rotating shaft; 5. driving bevel gear; 6. bidirectional screw rod; 7. driven bevel gear; 8. first nut block; 9. second nut block; 10. first connecting rod; 11. first hook; 12. second connecting rod; 13. second hook; 14. pulley; 15. directional rod; 16. reinforcing rib; 17. reinforcing groove; 18. wire groove; 19. raised strip; 20. operation indicator. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] See also Figure 1-4The utility model provides a technical solution: an automatic unhooking device for a crane, comprising a connecting frame 1, a mounting frame 2 is fixedly connected to the lower surface of the connecting frame 1, a motor 3 is fixedly installed on the upper surface of the inner wall of the mounting frame 2, a rotating shaft 4 is fixedly connected to the output shaft end of the motor 3, a driving bevel gear 5 is fixedly connected to the outer wall of the rotating shaft 4, a bidirectional screw rod 6 is rotatably connected to the inner wall of the mounting frame 2 through a bearing, a driven bevel gear 7 is fixedly connected to the outer wall of the bidirectional screw rod 6, the driven bevel gear 7 is meshed with the driving bevel gear 5, the outer wall of the bidirectional screw rod 6 is provided with two sections of external threads in opposite directions, the two sections of external threads are respectively threadedly connected with a first nut block 8 and a second nut block 9, the lower surface of the first nut block 8 is fixedly connected with a first connecting rod 10, and the lower surface of the first connecting rod 10 is fixedly connected with a second nut block 9. A hook 11, a second connecting rod 12 is fixedly connected to the lower surface of the second nut block 9, and a second hook 13 is fixedly connected to the lower surface of the second connecting rod 12; the starting motor 3 drives the rotating shaft 4 and the active bevel gear 5 to rotate, and the driven bevel gear 7 meshing with the active bevel gear 5 drives the bidirectional screw 6 to rotate, and the two sections of thread on the bidirectional screw 6 drive the first nut block 8 and the second nut block 9 to move away from or approach each other, so that the first connecting rod 10 and the second connecting rod 12 move away from or approach each other, and drive the first hook 11 and the second hook 13 to move away from or approach each other. When the first hook 11 and the second hook 13 pass through the lifting ear of the object and buckle with each other, the connection between the object and the device is completed, and when the first hook 11 and the second hook 13 are completely separated and detached from the lifting ear, the separation of the object from the device is completed.

[0022] In this embodiment, specifically: the inner side wall of the connecting frame 1 is rotatably connected to a pulley 14 via a bearing; and the pulley 14 is used to be connected to the lifting rope.

[0023] In this embodiment, specifically: two directional rods 15 are welded to the inner wall of the mounting frame 2, the outer wall of the directional rod 15 is slidingly connected to the first nut block 8, and the outer wall of the directional rod 15 is slidingly connected to the second nut block 9; so that the first nut block 8 and the second nut block 9 do not rotate with the rotation of the bidirectional screw rod 6, but remain away from or close to each other in the direction of the directional rod 15.

[0024] In this embodiment, specifically: a reinforcing rib 16 is fixedly connected to the left side wall of the second hook 13, a reinforcing groove 17 is opened on the right surface of the first hook 11, and the inner wall of the reinforcing groove 17 is slidably connected to the outer wall of the reinforcing rib 16; when the first hook 11 and the second hook 13 are interlocked, the reinforcing rib 16 penetrates into the interior of the reinforcing groove 17, thereby increasing the strength of the interlocking of the first hook 11 and the second hook 13.

[0025] In this embodiment, specifically: a wire groove 18 is provided on the outer side wall of the pulley 14 for accommodating the rope used for hoisting.

[0026] In this embodiment, specifically: the outer side walls of the first hook 11 and the second hook 13 are both welded with raised strips 19 , which increase the friction between the outer side walls of the first hook 11 and the second hook 13 and the lifting ears of the lifting device.

[0027] In this embodiment, specifically: an operation indicator board 20 is fixedly connected to the front surface of the connecting frame 1, and is used to demonstrate the use and operation method of the utility model.

[0028] The working principle of the utility model is as follows: the starting motor 3 drives the rotating shaft 4 and the active bevel gear 5 to rotate, and the driven bevel gear 7 meshing with the active bevel gear 5 drives the bidirectional screw 6 to rotate, and the two sections of thread on the bidirectional screw 6 drive the first nut block 8 and the second nut block 9 to move away from or approach each other, so that the first connecting rod 10 and the second connecting rod 12 move away from or approach each other, and drive the first hook 11 and the second hook 13 to move away from or approach each other. When the first hook 11 and the second hook 13 pass through the lifting ears of the object and engage with each other, the connection between the object and the device is completed, and when the first hook 11 and the second hook 13 are completely separated and detached from the lifting ears, the separation of the object from the device is completed, thereby constituting an automatic unhooking device for a crane, which can automatically realize the connection or separation of the device and the object. When some objects are relatively large in size and heavy in weight, the danger of manual operation is avoided, and the injury of staff can be effectively prevented, and the operation is safer.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic unhooking device for a crane, comprising a connecting frame (1), characterized in that: The lower surface of the connecting frame (1) is fixedly connected to a mounting frame (2), the upper surface of the inner wall of the mounting frame (2) is fixedly mounted with a motor (3), the output shaft end of the motor (3) is fixedly connected to a rotating shaft (4), the outer wall of the rotating shaft (4) is fixedly connected to a driving bevel gear (5), the inner wall of the mounting frame (2) is rotatably connected to a bidirectional screw rod (6) via a bearing, the outer wall of the bidirectional screw rod (6) is fixedly connected to a driven bevel gear (7), and the driven bevel gear (7) and the driving bevel gear (5) are connected to each other. The two-way screw rod (6) is meshedly connected, and the outer side wall of the two-way screw rod (6) is provided with two sections of external threads in opposite directions, and the two sections of external threads are respectively threadedly connected to a first nut block (8) and a second nut block (9), the lower surface of the first nut block (8) is fixedly connected to a first connecting rod (10), the lower surface of the first connecting rod (10) is fixedly connected to a first hook (11), the lower surface of the second nut block (9) is fixedly connected to a second connecting rod (12), and the lower surface of the second connecting rod (12) is fixedly connected to a second hook (13).

2. The automatic unhooking device for a crane according to claim 1, characterized in that: The inner side wall of the connecting frame (1) is rotatably connected to a pulley (14) via a bearing.

3. The automatic unhooking device for a crane according to claim 2, characterized in that: Two directional rods (15) are welded to the inner side wall of the mounting frame (2); the outer side wall of the directional rod (15) is slidably connected to the first nut block (8); and the outer side wall of the directional rod (15) is slidably connected to the second nut block (9).

4. The automatic unhooking device for a crane according to claim 2, characterized in that: A reinforcing rib (16) is fixedly connected to the left side wall of the second hook (13), and a reinforcing groove (17) is provided on the right surface of the first hook (11), wherein the inner side wall of the reinforcing groove (17) is slidably connected to the outer side wall of the reinforcing rib (16).

5. The automatic unhooking device for a crane according to claim 2, characterized in that: The outer side wall of the pulley (14) is provided with a wire groove (18).

6. The automatic unhooking device for a crane according to claim 2, characterized in that: The outer side walls of the first hook (11) and the second hook (13) are both welded with raised strips (19).

7. The automatic unhooking device for a crane according to claim 6, characterized in that: An operation indicator plate (20) is fixedly connected to the front surface of the connecting frame (1).

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