Crane crane with bottom protection device

Abstract

The utility model relates to the technical field of crane cranes, and discloses a crane crane with a bottom protection device, which comprises a cantilever, chutes are arranged on the outer walls of two ends of the cantilever, a movable frame is arranged at the bottom of the cantilever, two groups of pulleys distributed at equal intervals are movably connected to two ends of the inner wall of the movable frame, and the bottoms of the pulleys are in sliding fit with the bottoms of the inner walls of the chutes. A brake box is fixedly connected to the outer wall of one end of the movable frame, a forward and reverse motor is fixedly connected to the top of the inner wall of the brake box, a rotating shaft at the bottom of the forward and reverse motor is fixedly connected with a lead screw, and a connecting shaft at the bottom of the lead screw is movably connected to the bottom of the inner wall of the brake box. The problem that braking is delayed or excessive in the prior art is solved, the operation safety is remarkably improved, meanwhile, the moving frame moves on the cantilever more smoothly and flexibly, the device adapts to the complex operation environment, the safety of equipment and personnel is guaranteed in an all-around mode, the service life of the equipment is prolonged, and the practical value is high.

Description

Technical Field

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

[0002] Overhead cranes are large-scale mechanical equipment widely used in industrial production and logistics transportation. They are mainly used for lifting and unloading various heavy objects, playing a crucial role in improving production efficiency and reducing labor costs. With the continuous expansion of industrial production scale and the increasing demand for logistics transportation, higher requirements are placed on the safety, stability, and functionality of overhead cranes. Especially in complex operating environments, overhead cranes need to frequently move and perform loading and unloading operations. The installation of bottom protection devices can effectively prevent collisions between the equipment and ground obstacles, ensuring safe operation. It can also prevent accidental falls of heavy objects from injuring personnel and equipment on the ground. Therefore, overhead cranes equipped with bottom protection devices have become an urgent need in the industrial sector.

[0003] Traditional overhead cranes have many shortcomings in terms of bottom protection. On the one hand, the braking system of traditional overhead cranes is not precise enough, and braking delay or over-braking is prone to occur during the braking process. This not only affects the work efficiency, but may also cause the overhead crane to slip before it has come to a complete stop, increasing safety hazards, causing equipment damage, shortening the service life of the equipment, and may also cause production accidents, resulting in economic losses and safety risks to enterprises. To address this, we have proposed an overhead crane with a bottom protection device. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a crane with a bottom protection device, which solves the aforementioned problems.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a crane with a bottom protection device, comprising a cantilever, with grooves formed on the outer walls at both ends of the cantilever, a movable frame at the bottom of the cantilever, two sets of equally spaced pulleys movably connected to the inner walls of the movable frame at both ends, the bottom of the pulleys slidingly engaging with the bottom of the inner wall of the groove, a brake box fixedly connected to the outer wall at one end of the movable frame, a forward and reverse motor fixedly connected to the top of the inner wall of the brake box, a lead screw fixedly connected to the bottom rotating shaft of the forward and reverse motor, and a connecting shaft movably connected to the bottom of the inner wall of the brake box.

[0006] Preferably, a movable sleeve is threaded to the outer wall of one end of the lead screw, and the outer walls on both sides of the movable sleeve are in sliding fit with the inner walls of the brake box.

[0007] Preferably, one end of the outer wall of the movable sleeve extends to one end of the outer wall of the brake box, and a brake strip is fixedly connected to the bottom of the outer wall of the movable sleeve. The bottom output end of the brake strip is in frictional contact with the bottom of the inner wall of the slide groove.

[0008] Preferably, a second forward and reverse motor is fixedly connected to the outer wall of the end of the movable frame away from the brake box, and a movable wheel is fixedly connected to the rotating shaft of the second forward and reverse motor, with the bottom of the movable wheel in contact with one end of the bottom of the slide groove.

[0009] Preferably, a hoist is fixedly connected to the bottom of the mobile frame.

[0010] Preferably, columns are fixedly connected to the outer walls on both sides of the cantilever, and bases are fixedly connected to the bottom of the columns.

[0011] Preferably, the outer walls on both sides of the base are movably connected to two sets of equally spaced second moving wheels.

[0012] Compared with the prior art, the present invention provides a crane with a bottom protection device, which has the following advantages:

[0013] 1. This crane with a bottom protection device addresses the issues of braking delay or over-braking inherent in traditional crane braking systems. Its precise braking is achieved through a linkage between a forward and reverse motor-driven lead screw, a moving sleeve, and a brake bar within the brake box. When braking is required, the forward and reverse motors drive the lead screw to rotate, precisely raising and lowering the moving sleeve. This ensures the brake bar makes tight contact with the bottom of the slide rail, quickly generating friction to stop the moving frame. This precise braking method prevents crane slippage due to delayed braking, effectively reducing the probability of accidents such as falling objects and equipment collisions. Furthermore, precise braking reduces unnecessary braking adjustment time, allowing the crane to quickly proceed to the next work stage, significantly improving operational efficiency.

[0014] 2. This crane with a bottom protection device achieves flexible movement through the linkage of a second forward and reverse motor with moving wheels, and the cooperation of pulleys and slide rails. The second forward and reverse motor can precisely control the rotation of the moving wheels, driving the moving frame to move flexibly on the cantilever, and the pulleys effectively reduce the friction of the moving frame during movement, making its operation more stable.

[0015] 3. The crane with bottom protection device features a friction braking design between the brake bar and the slide rail, which can quickly brake the moving frame in an emergency to prevent the equipment from sliding and causing accidents. The cooperation between the pulleys and moving wheels and the slide rail ensures the smooth movement of the moving frame while avoiding collisions caused by movement deviation. The stable support structure of the base and column enhances the stability of the entire crane and can effectively resist the shaking and impact generated when lifting heavy objects. Attached Figure Description

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

[0017] Figure 2 This is a side view of the present invention;

[0018] Figure 3 This is a cross-sectional view of the present invention;

[0019] Figure 4 This is a top view of the present invention.

[0020] In the diagram: 1. Cantilever; 2. Slide rail; 3. Moving frame; 4. Pulley; 5. Brake box; 6. Forward and reverse motor; 7. Lead screw; 8. Moving sleeve; 9. Brake bar; 10. Second forward and reverse motor; 11. Moving wheel; 12. Hoist; 13. Column; 14. Base; 15. Second moving wheel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 A crane with a bottom protection device includes a cantilever 1. The outer walls of both ends of the cantilever 1 are provided with grooves 2. The bottom of the cantilever 1 is provided with a movable frame 3. The inner walls of the movable frame 3 are movably connected to two sets of equally distributed pulleys 4. The bottom of the pulleys 4 is in sliding fit with the bottom of the inner wall of the groove 2. A brake box 5 is fixedly connected to the outer wall of one end of the movable frame 3. A forward and reverse motor 6 is fixedly connected to the top of the inner wall of the brake box 5. The bottom rotating shaft of the forward and reverse motor 6 is fixedly connected to a lead screw 7. The bottom connecting shaft of the lead screw 7 is movably connected to the bottom of the inner wall of the brake box 5. The forward and reverse motor 6 converts the rotational motion into linear motion through the lead screw 7, providing a power transmission basis for subsequent braking operations and ensuring that the braking system can operate accurately and reliably.

[0023] A movable sleeve 8 is threaded to the outer wall of one end of the lead screw 7. The outer walls of the movable sleeve 8 on both sides are in sliding fit with the inner walls of the brake box 5. Driven by the lead screw 7, the movable sleeve 8 slides stably in a straight line along the inner walls of the brake box 5, converting the rotational motion of the lead screw 7 into its own linear motion, providing displacement power for the lifting and lowering of the brake bar 9, and realizing precise control of the braking system.

[0024] One end of the outer wall of the movable sleeve 8 extends to one end of the outer wall of the brake box 5. A brake strip 9 is fixedly connected to the bottom of the outer wall of the movable sleeve 8. The bottom output end of the brake strip 9 is in frictional contact with the bottom of the inner wall of the slide groove 2. When the movable sleeve 8 drives the brake strip 9 to descend and contact the bottom of the inner wall of the slide groove 2, the friction force is increased, and the movable frame 3 is stopped quickly and effectively, thereby realizing the braking function of the movable frame 3 of the crane and ensuring the safety and stability of the crane during operation.

[0025] A second forward and reverse motor 10 is fixedly connected to the outer wall of the end of the mobile frame 3 away from the brake box 5. The rotating shaft of the second forward and reverse motor 10 is fixedly connected to a moving wheel 11. The bottom of the moving wheel 11 contacts one end of the bottom of the slide 2. The second forward and reverse motor 10 drives the moving wheel 11 to rotate. By using the friction between the moving wheel 11 and the bottom of the slide 2, the mobile frame 3 is driven to move back and forth on the cantilever 1, so as to realize the horizontal position adjustment of the crane to meet the needs of cargo lifting position in different working scenarios.

[0026] The bottom of the mobile frame 3 is fixedly connected to the hoist 12, which can realize the vertical lifting and lowering operation of the goods. Through its internal mechanical transmission structure, the lifting and lowering height of the goods can be precisely controlled. It is a key component for the crane to realize the lifting function of the goods, which greatly expands the working range and practicality of the crane.

[0027] The outer walls on both sides of the cantilever 1 are fixedly connected to columns 13, and the bottom of the columns 13 is fixedly connected to a base 14. The columns 13 and the base 14 constitute the support structure of the crane, providing stable support for the entire crane, bearing various loads during the operation of the crane, ensuring the overall stability and safety of the crane during operation, and enabling it to reliably complete the lifting and transportation of goods.

[0028] The outer walls on both sides of the base 14 are movably connected to two sets of equidistant second moving wheels 15. The second moving wheels 15 enable the crane to move on the ground, facilitating the transfer of the crane between different work areas, improving the crane's mobility and flexibility of use, and expanding the application range of the crane.

[0029] Instructions for use

[0030] Structural description: 1. Cantilever 1: As the main load-bearing structure of the crane, it provides track support for the movement of the mobile frame 3. Slide grooves 2 are opened on the outer walls at both ends, and columns 13 are fixedly connected to the outer walls on both sides.

[0031] 2. Slide 2: It is formed on the outer wall at both ends of the cantilever 1, and cooperates with the pulley 4 and the movable wheel 11 to guide the movement of the movable frame 3 and provide a motion track;

[0032] 3. Mobile frame 3: Located at the bottom of cantilever 1, with pulleys 4 and sliding grooves 2 at both ends of the inner wall, which can move along cantilever 1. Brake box 5 is fixedly connected to the outer wall of one end, and the second positive and negative motor 10 is fixedly connected to the outer wall of the other end away from brake box 5. The hoist 12 is fixedly connected to the bottom.

[0033] 4. Pulley 4: It is movably connected to both ends of the inner wall of the movable frame 3, and its bottom is slidably engaged with the bottom of the inner wall of the slide groove 2 to reduce the friction when the movable frame 3 moves and ensure its smooth movement;

[0034] 5. Brake box 5: It is fixedly connected to the outer wall of one end of the moving frame 3, and the internal components such as forward and reverse motor 6, lead screw 7, and moving sleeve 8 are installed to realize the braking of the moving frame 3.

[0035] 6. Forward and reverse motor 6: Installed on the top of the inner wall of the brake box 5, it drives the moving sleeve 8 through the lead screw 7 to provide power to the braking system;

[0036] 7. Lead screw 7: One end is fixedly connected to the bottom rotating shaft of the forward and reverse motor 6, and the bottom connecting shaft is movably connected to the bottom of the inner wall of the brake box 5, converting the rotational motion of the forward and reverse motor 6 into the linear motion of the moving sleeve 8.

[0037] 8. Moving sleeve 8: Threaded to the outer wall of one end of the lead screw 7, with its two outer walls slidingly engaged with the inner walls of the brake box 5. It moves by itself to drive the brake bar 9 to rise and fall to achieve braking.

[0038] 9. Brake bar 9: It is fixedly connected to the bottom of the outer wall of one end of the movable sleeve 8. Its bottom output end rubs against the bottom of the inner wall of the slide groove 2 when braking, so that the movable frame 3 stops moving.

[0039] 10. Second forward and reverse motor 10: Fixedly connected to the outer wall of the end of the movable frame 3 away from the brake box 5, and drives the movable wheel 11 through the rotating shaft, thereby moving the movable frame 3 on the cantilever 1;

[0040] 11. Moving wheel 11: It is fixedly connected to the rotating shaft of the second forward and reverse motor 10, and its bottom is in contact with one end of the bottom of the slide 2. Under the drive of the second forward and reverse motor 10, it drives the moving frame 3 to move.

[0041] 12. Hoist 12: Fixedly connected to the bottom of the movable frame 3, used to realize the vertical lifting and lowering of goods;

[0042] 13. Column 13: It is fixedly connected to the outer walls on both sides of the cantilever 1, and its bottom is fixedly connected to the base 14, which serves to support the cantilever 1 and the entire crane.

[0043] 14. Base 14: Located at the bottom of column 13, it provides stable support for the entire crane, and the second moving wheels 15 are movably connected to the outer walls on both sides;

[0044] 15. Second moving wheels 15: Movably connected to the outer walls on both sides of the base 14, enabling the entire crane to move on the ground and facilitating transfer to different work areas.

[0045] Working Principle: During operation, the moving frame 3 moves on the cantilever 1 via the second forward / reverse motor 10 and the moving wheel 11. Specifically, after the second forward / reverse motor 10 is energized, its rotating shaft drives the moving wheel 11 to rotate. The bottom of the moving wheel 11 contacts one end of the bottom of the slide groove 2. Under the action of friction, the rotation of the moving wheel 11 causes the moving frame 3 to slide along the slide groove 2 on the outer walls of both ends of the cantilever 1, thereby realizing the movement of the moving frame 3 on the cantilever 1, so that the crane can reach the designated position according to actual needs. When it is necessary to brake the moving frame 3, the forward / reverse motor 6 is started, and its bottom rotating shaft drives the lead screw 7 to rotate. The moving sleeve 8, which is threaded to the outer wall of one end of the lead screw 7, moves up and down along the lead screw 7 when the lead screw 7 rotates, because the outer walls of the moving sleeve 8 on both sides are in sliding fit with the inner walls of the brake box 5. The outer wall of the moving sleeve 8 extends to one end of the outer wall of the brake box 5, and the brake strip 9 fixedly connected to its bottom also moves accordingly. When the moving sleeve 8 moves downward, the bottom output end of the brake bar 9 makes frictional contact with the bottom of the inner wall of the slide 2. This friction stops the moving frame 3, thus achieving the braking function and ensuring the stability and safety of the crane during operation. The hoist 12, fixedly connected to the bottom of the moving frame 3, lifts goods by linking related components through its internal mechanical structure after being powered on. The power unit of the hoist 12 drives ropes or chains to lift or lower goods, meeting the crane's need for height adjustment in different working scenarios. The columns 13 fixedly connected to the outer walls on both sides of the cantilever 1, along with the base 14, provide stable support for the crane. The base 14, fixedly connected to the bottom of the columns 13, contacts the ground, supporting the cantilever 1 and ensuring the entire crane remains stable during operation, bearing various loads and guaranteeing normal operation and safety.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 with a bottom protection device, comprising a cantilever (1), characterized in that: The cantilever (1) has grooves (2) on the outer walls at both ends. The cantilever (1) has a movable frame (3) at the bottom. The movable frame (3) has two sets of equally spaced pulleys (4) movably connected to both ends of its inner wall. The bottom of the pulleys (4) is in sliding fit with the bottom of the inner wall of the groove (2). A brake box (5) is fixedly connected to the outer wall at one end of the movable frame (3). A forward and reverse motor (6) is fixedly connected to the top of the inner wall of the brake box (5). A lead screw (7) is fixedly connected to the bottom rotating shaft of the forward and reverse motor (6). The bottom connecting shaft of the lead screw (7) is movably connected to the bottom of the inner wall of the brake box (5).

2. A crane with a bottom protection device according to claim 1, characterized in that: The outer wall of one end of the lead screw (7) is threaded with a movable sleeve (8), and the outer walls on both sides of the movable sleeve (8) are in sliding fit with the inner walls on both sides of the brake box (5).

3. A crane with a bottom protection device according to claim 2, characterized in that: One end of the outer wall of the movable sleeve (8) extends to one end of the outer wall of the brake box (5). A brake strip (9) is fixedly connected to the bottom of the outer wall of one end of the movable sleeve (8). The bottom output end of the brake strip (9) is in frictional contact with the bottom of the inner wall of the slide groove (2).

4. A crane with a bottom protection device according to claim 1, characterized in that: The second forward and reverse motor (10) is fixedly connected to the outer wall of the end of the moving frame (3) away from the brake box (5). The rotating shaft of the second forward and reverse motor (10) is fixedly connected to the moving wheel (11). The bottom of the moving wheel (11) is in contact with the bottom end of the slide groove (2).

5. A crane with a bottom protection device according to claim 1, characterized in that: The bottom of the mobile frame (3) is fixedly connected to a hoist (12).

6. A crane with a bottom protection device according to claim 1, characterized in that: The outer walls on both sides of the cantilever (1) are fixedly connected to columns (13), and the bottom of the columns (13) is fixedly connected to a base (14).

7. A crane with a bottom protection device according to claim 6, characterized in that: The base (14) has two sets of second moving wheels (15) equidistantly connected to the outer walls on both sides.

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