Multi-stage buffering anti-falling safety structure of crane

Abstract

The utility model discloses a multi-stage buffer anti-falling safety structure of a crane, which comprises a mounting frame, one end of a fixed chain is fixedly connected with the bottom of the mounting frame, the other end of the fixed chain is fixedly connected with an electromagnet, a driving mechanism is fixedly assembled in the mounting frame, and the left end and the right end of the driving mechanism are respectively provided with a protection frame which is in transmission connection with the driving mechanism. A connecting mechanism is fixedly assembled on the top of the mounting frame, a lifting frame is fixedly assembled on the top of the connecting mechanism, and lifting rings are fixedly connected to the four corners of the top of the lifting frame. The auxiliary supporting shaft is inserted into a workpiece, if power failure occurs in the hoisting process, the workpiece can be protected through the protection frame, the workpiece is prevented from falling off from the high altitude, meanwhile, the air bag is further arranged on the outer side wall of the auxiliary supporting shaft, the falling workpiece can be buffered through the arranged air bag, and the workpiece is prevented from falling off from the high altitude. The fixing stability of the protection frame is enhanced, and deformation of the protection frame in the anti-falling process of a workpiece is reduced.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to a multi-level buffer anti-fall safety structure for cranes. Background Technology

[0002] A crane is a multi-functional lifting device capable of vertically lifting and horizontally moving heavy objects within a specific range. Electromagnetic lifting devices are a commonly used type of lifting device in cranes. Their working principle involves using the attraction of electromagnets to fix the workpiece, thereby achieving the lifting and moving of the workpiece. However, during use, if a sudden power outage occurs, the attraction force of the electromagnet may instantly disappear, causing the workpiece to separate from the electromagnet and potentially fall from a height, posing a safety hazard. Utility Model Content

[0003] The purpose of this invention is to provide a multi-level buffer anti-fall safety structure for cranes to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage buffer anti-fall safety structure for a crane, including a mounting frame, one end of a fixed chain fixedly connected to the bottom of the mounting frame, an electromagnet fixedly connected to the other end of the fixed chain, a drive mechanism fixedly assembled inside the mounting frame, protective frames connected to the drive mechanism at its left and right ends respectively, a connecting mechanism fixedly assembled at the top of the mounting frame, a lifting frame fixedly assembled at the top of the connecting mechanism, and lifting rings fixedly connected to the four corners of the top of the lifting frame;

[0005] The protective frame includes a fixing block, the top of which is fixedly connected to connecting arms that are symmetrically distributed in front and back, and the inner sidewall of the fixing block is fixedly connected to an auxiliary support shaft.

[0006] An airbag is fitted onto the outer wall of the auxiliary support shaft.

[0007] The driving mechanism includes a driving frame, which is symmetrically and fixedly connected to the side wall of the mounting frame. The left and right ends of the driving frame are rotatably connected to the top of the connecting arm. A hydraulic telescopic cylinder is fixedly installed inside the driving frame. The output end of the hydraulic telescopic cylinder passes through the driving frame and is fixedly connected to a lifting arm. One end of the driving arm is rotatably connected to both ends of the lifting arm, and the other end of the driving arm is rotatably connected to the middle of the connecting arm.

[0008] An oil reservoir is fixedly mounted inside the mounting frame, and an oil pump is fixedly mounted on the top of the oil reservoir. The output end of the oil pump is fixedly connected to the input end of the hydraulic telescopic cylinder through a connecting pipe.

[0009] The connecting mechanism includes a connecting seat, a connecting block fixedly connected to the top of the connecting seat, the connecting block fixedly connected to the bottom of the hoisting frame, a rotating block rotatably connected inside the connecting seat, the rotating block fixedly connected to the top of the mounting frame, a pin-type electromagnet fixedly mounted on the side wall of the connecting block, a positioning pin fixedly connected to the output end of the pin-type electromagnet, the positioning pin being inserted into a positioning hole, and the positioning hole being opened on the top of the rotating block.

[0010] A first marker block is fixedly connected to the side wall of the connecting seat, and a second marker block is fixedly connected to the side wall of the rotating block. The positions of the first marker block and the second marker block correspond to each other.

[0011] Compared with the prior art, the beneficial effects of this utility model are: a multi-level buffer anti-fall safety structure for cranes, the overall structure is used in conjunction with the electromagnet-type lifting device of the crane. After the electromagnet attracts and fixes the workpiece, the movement of the lifting arm and the drive arm in the drive mechanism can drive the protective frame to close from both sides, inserting the auxiliary support shaft into the workpiece. If a power failure occurs during the hoisting process, the protective frame can protect the workpiece and prevent it from falling from a height. At the same time, an airbag is also provided on the outer wall of the auxiliary support shaft. The airbag can buffer the falling workpiece, thereby strengthening the stability of the protective frame and reducing the deformation of the protective frame during the anti-fall process.

[0012] This utility model features a connecting mechanism at the top of the mounting frame. The angle between the electromagnet and the protective frame can be adjusted by the action of the connecting mechanism. When fixing the workpiece, the electromagnet and the protective frame can be better matched with the workpiece. At the same time, during the hoisting process, the cooperation between the positioning pin and the positioning hole can prevent the overall structure from rotating during the hoisting process, thereby increasing the stability of the mounting frame and the workpiece during the hoisting process. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of the protective frame of this utility model.

[0015] Figure 3 This is a schematic diagram of the connection mechanism of this utility model.

[0016] Figure 4 This is a schematic diagram of the connection between the positioning pin and the positioning hole of this utility model.

[0017] Figure 5 This is a schematic diagram of the structure of the present invention when hoisting the workpiece.

[0018] In the diagram: 1. Mounting frame; 2. Fixed chain; 3. Electromagnet; 4. Drive mechanism; 41. Drive frame; 42. Hydraulic telescopic cylinder; 43. Lifting arm; 44. Drive arm; 45. Oil tank; 46. Oil pump; 5. Protective frame; 51. Fixed block; 52. Connecting arm; 53. Auxiliary support shaft; 54. Airbag; 6. Connecting mechanism; 61. Connecting seat; 62. Connecting block; 63. Rotating block; 64. Pin-type electromagnet; 65. Positioning pin; 66. Positioning hole; 7. Lifting frame; 71. Lifting ring; 8. First marking block; 9. Second marking block. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example

[0020] Please see Figures 1-5 A multi-stage buffer anti-fall safety structure for a crane includes a mounting frame 1. One end of a fixing chain 2 is fixedly connected to the four corners of the bottom of the mounting frame 1. The other end of the fixing chain 2 is fixedly connected to an electromagnet 3. The electromagnet 3 is electrically connected to an external power supply and an external controller. The electromagnet 3 attracts and fixes the metal workpiece to be transported. A drive mechanism 4 is fixedly installed inside the mounting frame 1. Protective frames 5 are symmetrically installed at both ends of the drive mechanism 4. The drive mechanism 4 can drive the protective frames 5 to move. After the electromagnet 3 attracts and fixes the workpiece, the protective frames 5 can protect the workpiece during the hoisting process. In the event of a sudden power failure during hoisting, the protective frames 5 can lift the workpiece to prevent it from falling from a height and causing a safety accident.

[0021] The top of the mounting frame 1 is fixedly equipped with a connecting mechanism 6, and the top of the connecting mechanism 6 is fixedly equipped with a lifting frame 7. Lifting rings 71 are welded and fixed at the four corners of the lifting frame 7. The lifting rings 71 are used to connect with the crane. This utility model is applicable to gantry cranes and is used to lift workpieces to a designated position for storage and sorting. The connecting mechanism 6 can adjust the lifting angle of the lifting device, so that the electromagnet 3 and the protective frame 5 can dock with the workpiece to be lifted.

[0022] like Figure 1As shown, the drive mechanism 4 includes a drive frame 41. There are two drive frames 41, which are symmetrically fixedly mounted on the side wall of the mounting frame 1. The left and right ends of the drive frame 41 are rotatably connected to the top of the protective frame 5. A hydraulic telescopic cylinder 42 is fixedly mounted in the middle of the drive frame 41. The output end of the hydraulic telescopic cylinder 42 passes through the drive frame 41 and is fixedly connected to a lifting arm 43. The left and right ends of the lifting arm 43 are rotatably connected to one end of the drive arm 44. The other end of the drive arm 44 is rotatably connected to the side wall of the protective frame 5. By driving the lifting arm 43 through the hydraulic telescopic cylinder 42, the drive arm 44 can drive the protective frame 5 to rotate at the connection point with the drive frame 41, thereby adjusting the movement of the protective frame 5 and making the protective frame 5 open or close. When the protective frame 5 is open, it is convenient for the electromagnet 3 to be attracted and fixed to the workpiece. When the protective frame 5 is closed, it can protect the workpiece during the hoisting process.

[0023] The mounting bracket 1 is equipped with an oil reservoir 45, which is used to store hydraulic oil. An oil pump 46 is fixedly mounted on the top of the oil reservoir 45. The oil pump 46 is electrically connected to an external power supply and an external controller. The output end of the oil pump 46 is fixedly connected to the input end of the hydraulic telescopic cylinder 42 through a connecting pipe. The oil pump 46 supplies hydraulic oil to the hydraulic telescopic cylinder 42, thereby controlling the movement of the output end of the hydraulic telescopic cylinder 42.

[0024] like Figure 2 As shown, the protective frame 5 includes a fixing block 51. A connecting arm 52 is symmetrically welded to the top of the fixing block 51. The top of the connecting arm 52 is rotatably connected to the end of the drive frame 41. The side wall of the connecting arm 52 is rotatably connected to the end of the drive arm 44. An auxiliary support shaft 53 is welded to the inner side wall of the fixing block 51. The auxiliary support shaft 53 is used to support the falling workpiece. An airbag 54 is sleeved on the outer side wall of the auxiliary support shaft 53. By setting the airbag 54, the workpiece can be buffered during the falling process, so as to avoid the pressure generated by the instantaneous fall of the workpiece causing deformation of the protective frame 5 and affecting subsequent use.

[0025] like Figure 3 and Figure 4As shown, the connecting mechanism 6 includes a connecting seat 61, a connecting block 62 welded and fixed to the top of the connecting seat 61, the connecting block 62 welded and fixed to the bottom center of the hoisting frame 7, a rotating block 63 rotatably connected inside the connecting seat 61, the rotating block 63 welded and fixed to the top of the mounting frame 1, a bearing can be installed between the rotating block 63 and the connecting seat 61 to increase the smoothness of the rotation of the rotating block 63 inside the connecting seat 61, pin-type electromagnets 64 are fixedly installed on the left and right side walls of the connecting block 62 respectively, the output end of the pin-type electromagnet 64 is fixedly connected to a positioning pin 65 that penetrates the connecting seat 61, the top of the rotating block 63 is provided with a positioning hole 66 for the positioning pin 65 to be inserted, the positioning pin 65 is inserted into the positioning hole 66 to realize the snap-fit ​​fixation between the rotating block 63 and the connecting seat 61.

[0026] like Figure 3 As shown, the front and rear side walls of the connecting seat 61 are welded and fixed with a first marking block 8, and the side wall of the rotating block 63 is welded and fixed with a second marking block 9. The rotation angle of the rotating block 63 is judged by the first marking block 8 and the second marking block 9. When the positioning hole 66 and the positioning pin 65 are in the matching position, the first marking block 8 and the second marking block 9 coincide.

[0027] Working principle: such as Figure 1 and Figure 5 As shown, when using this structure to lift a workpiece, firstly, the lifting frame 7 is connected and fixed to the crane's lifting rope. Then, the present invention is lowered to the lifting position above the workpiece. During lifting, the pin-type electromagnet 64 is first energized and triggered, causing the positioning pin 65 to move upward out of the positioning hole 66. At this time, the rotating block 63 can be rotated in the connecting seat 61 to rotate the electromagnet 3 and the protective frame 5 to an angle matching the workpiece. The workpiece is then attracted and fixed by the electromagnet 3. Then, the hydraulic telescopic cylinder 42 drives the lifting arm 43 to move downward, causing the protective frame 5 to retract from both sides. The auxiliary support shaft 53 of the protective frame 5 is inserted into the workpiece. Inside, the crane first lifts the workpiece slightly upwards. After the workpiece leaves the ground, the worker holds the protective frame 5 and rotates the rotating block 63 so that the second marker block 9 corresponds to the position of the first marker block 8. Then, the power to the pin-type electromagnet 64 is cut off. At this time, the positioning pin 65 is inserted into the positioning hole 66 to limit and fix the angle position between the rotating block 63 and the connecting seat 61. The workpiece is then hoisted. During the hoisting process, the multi-level buffer composed of the protective frame 5 and the airbag 54 can fully protect the workpiece and prevent it from falling in the air after the electromagnet 3 is suddenly de-energized, thus avoiding safety hazards.

Claims

1. A multi-stage buffer fall protection safety structure for a crane, comprising a mounting frame (1), characterized in that: The bottom of the mounting frame (1) is fixedly connected to one end of the fixing chain (2), and the other end of the fixing chain (2) is fixedly connected to the electromagnet (3). The mounting frame (1) is fixedly equipped with a drive mechanism (4). The left and right ends of the drive mechanism (4) are respectively equipped with protective frames (5) that are connected to it for transmission. The top of the mounting frame (1) is fixedly equipped with a connecting mechanism (6). The top of the connecting mechanism (6) is fixedly equipped with a hoisting frame (7). The four corners of the top of the hoisting frame (7) are fixedly connected with lifting rings (71). The protective frame (5) includes a fixing block (51), the top of the fixing block (51) is fixedly connected to a connecting arm (52) that is symmetrically distributed in front and back, and the inner sidewall of the fixing block (51) is fixedly connected to an auxiliary support shaft (53).

2. The multi-stage buffer anti-fall safety structure for a crane according to claim 1, characterized in that: An airbag (54) is fitted onto the outer wall of the auxiliary support shaft (53).

3. The multi-stage buffer anti-fall safety structure for a crane according to claim 1, characterized in that: The drive mechanism (4) includes a drive frame (41), which is symmetrically fixedly connected to the side wall of the mounting frame (1). The left and right ends of the drive frame (41) are rotatably connected to the top of the connecting arm (52). A hydraulic telescopic cylinder (42) is fixedly installed inside the drive frame (41). The output end of the hydraulic telescopic cylinder (42) passes through the drive frame (41) and is fixedly connected to a lifting arm (43). The two ends of the lifting arm (43) are rotatably connected to one end of the drive arm (44), and the other end of the drive arm (44) is rotatably connected to the middle of the connecting arm (52).

4. The multi-stage buffer anti-fall safety structure for a crane according to claim 3, characterized in that: The drive mechanism (4) also includes an oil tank (45) fixedly mounted in the mounting frame (1), and an oil pump (46) is fixedly mounted on the top of the oil tank (45). The output end of the oil pump (46) is fixedly connected to the input end of the hydraulic telescopic cylinder (42) through a connecting pipe.

5. The multi-stage buffer anti-fall safety structure for a crane according to claim 1, characterized in that: The connecting mechanism (6) includes a connecting seat (61), a connecting block (62) is fixedly connected to the top of the connecting seat (61), the connecting block (62) is fixedly connected to the bottom of the hoisting frame (7), a rotating block (63) is rotatably connected inside the connecting seat (61), the rotating block (63) is fixedly connected to the top of the mounting frame (1), a pin-type electromagnet (64) is fixedly mounted on the side wall of the connecting block (62), a positioning pin (65) is fixedly connected to the output end of the pin-type electromagnet (64), the positioning pin (65) is inserted into the positioning hole (66), and the positioning hole (66) is opened on the top of the rotating block (63).

6. The multi-stage buffer anti-fall safety structure for a crane according to claim 5, characterized in that: The side wall of the connecting seat (61) is fixedly connected to a first marking block (8), and the side wall of the rotating block (63) is fixedly connected to a second marking block (9). The positions of the first marking block (8) and the second marking block (9) correspond to each other.

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