Lifting hoist folding arm crane

Abstract

The utility model relates to the technical field of hoisting equipment, in particular to a lifting hoist folding arm crane which comprises a square stand column, a first rotating arm and a second rotating arm. A linear guide rail is arranged on the square stand column, the sliding block is connected with the cantilever installation base, the first rotating arm is hinged to the installation base, the second rotating arm is connected with the first rotating arm through the rotating joint assembly, and the hook is arranged on the second rotating arm. And the electric hoist drives the cantilever mounting seat to move along the guide rail to lift the hoisted object. Swing of a hoisted object is reduced by enabling the hoisted object to be close to the hook, and flexibility is improved through the secondary folding arm design. Damping pieces are further arranged to adjust rotation resistance, and sliding rails are arranged to adjust the positions of the hooks. Swing and collision of a hoisted object in the hoisting process can be effectively avoided, and the operation flexibility and safety are improved.

Description

Technical Field

[0001] This utility model relates to the field of hoisting equipment technology, and more specifically, to a lifting hoist folding arm crane. Background Technology

[0002] In the field of lifting equipment technology, cantilever cranes, as a common type of light lifting equipment, are widely used in industrial production, warehousing and logistics. Traditional cantilever cranes typically consist of a column, a slewing arm, a slewing drive device, and an electric hoist hook. The lower end of the column is fixed to a concrete foundation with anchor bolts. Lifting and moving of heavy objects are achieved by driving the slewing arm and the left-right linear movement of the electric hoist hook. For example, patent document CN109132881A discloses a cantilever crane that uses two fixed seats installed on a support column, with a vertical cantilever shaft between the seats. The two ends of the cantilever shaft are connected to the fixed seats via bearings, thus achieving the lateral rotation and lifting functions of the cantilever. However, traditional cantilever cranes have significant shortcomings in practical applications, especially during lifting. The flexibly lifted object using the electric hoist hook causes the object below the rope to easily sway due to its large inertia when the cantilever swings. This swaying not only increases the difficulty of operation but may also cause the hoisted object to collide with loading equipment such as machine tools and cabinets, resulting in equipment damage or safety hazards. Furthermore, the structural design of traditional cantilever cranes is relatively simple, making it difficult to adapt to the lifting needs in complex environments. For example, when the hoisted object needs to enter narrow spaces or restricted areas, the flexibility and applicability of traditional cantilever cranes are limited. Therefore, how to design a lifting hoist folding arm crane that can provide stable lifting, reduce the swaying of the hoisted object, and adapt to various lifting scenarios has become an urgent technical problem to be solved. Utility Model Content

[0003] This utility model provides a lifting hoist folding arm crane, which aims to improve at least one of the above-mentioned technical problems.

[0004] To solve the above-mentioned technical problems, this utility model provides a lifting hoist folding arm crane, including a square column, a first rotating arm, and a second rotating arm. A linear guide rail is longitudinally fixed on one side of the square column, and a slider is slidably connected to the linear guide rail. A cantilever mounting seat is fixedly connected to the slider, and a first rotating arm is hinged to the cantilever mounting seat. A second rotating arm is hinged to the end of the first rotating arm away from the cantilever mounting seat via a rotary joint assembly, and a hook is configured on the second rotating arm. A bracket is fixedly connected to the upper end of the square column, and an electric hoist is mounted on the bracket. The output end of the electric hoist is connected to the upper end of the cantilever mounting seat to drive the cantilever mounting seat to move on the linear guide rail.

[0005] As a further optimization, the rotary joint assembly includes a first bushing, a first bearing, a first rotating shaft, and a connecting plate. The first bushing is fixed to the front end of the first rotating arm. The first rotating shaft is rotatably connected to the inside of the first bushing through the first bearing. The upper and lower ends of the first rotating shaft extend out of the first bushing and are respectively fixedly connected to the connecting plate. The second rotating arm is fixedly connected between the two connecting plates.

[0006] As a further optimization, a damping component is also included, comprising a connecting block, an adjusting bolt, a spring, and a friction block. The connecting block is fixed to the outside of the first bushing, and an inner cavity is formed within the connecting block that corresponds to the inside of the first bushing. The adjusting bolt extends into the inner cavity and is threadedly connected to the connecting block. The spring is disposed between the friction block and the adjusting bolt, and the end of the friction block away from the bolt slides against the first rotating shaft.

[0007] As a further optimization, two damping elements are provided.

[0008] As a further optimization, a gap is left between the first bushing and the second rotating arm.

[0009] As a further optimization, a limiting block is fixed on the inner side of the connecting plate.

[0010] As a further optimization, the second rotating arm is provided with a slide rail, and the hook is slidably connected to the slide rail.

[0011] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0012] This application provides a lifting hoist folding arm crane, comprising a square column, a first swivel arm, and a second swivel arm. A linear guide rail is mounted on the square column, and a slider connects to a cantilever mounting base. The first swivel arm is hinged to the mounting base, and the second swivel arm is connected to the first swivel arm via a rotary joint assembly. A hook is located on the second swivel arm. The electric hoist drives the cantilever mounting base to move along the guide rail, thereby lifting and lowering the load. By bringing the load closer to the hook, the swaying of the load is reduced, and the secondary folding arm design enhances flexibility. Damping components are also included to adjust rotational resistance, and a guide rail is used to adjust the hook position. This application effectively avoids swaying and collisions of the load during lifting, improving operational flexibility and safety. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a structural schematic diagram of a lifting hoist folding arm crane according to this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the rotary joint assembly of this utility model;

[0016] Figure 3 This is a partial schematic diagram of the front end of a lifting hoist folding arm crane according to this utility model.

[0017] The markings in the diagram are: 1. Square column; 2. Linear guide rail; 3. Slider; 4. Cantilever mounting base; 5. First swing arm; 6. Second swing arm; 7. Bracket; 8. Electric hoist; 9. Rotary joint assembly; 10. Hook; 11. First bushing; 12. First bearing; 13. First shaft; 14. Connecting plate; 15. Damping component; 16. Connecting block; 17. Adjusting bolt; 18. Spring; 19. Friction block; 20. Limiting block; 21. Slide rail. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] Depend on Figures 1 to 3 As shown, this utility model provides a lifting hoist folding arm crane, which includes main components such as a square column 1, a linear guide rail 2, a slider 3, a cantilever mounting base 4, a first rotating arm 5, a second rotating arm 6, a bracket 7, an electric hoist 8, a rotating joint assembly 9, and a hook 10. Through reasonable structural design and functional coordination, these components achieve stable lifting and flexible operation of the hoisted object.

[0020] The square column 1 serves as the main support structure of the entire equipment, with a linear guide rail 2 fixed longitudinally on one side. The linear guide rail 2 guides the vertical movement of the slider 3, and the cantilever mounting base 4 is fixedly connected to the slider 3 by bolts or welding. A first rotating arm 5 is hinged to the cantilever mounting base 4, and a second rotating arm 6 is hinged to the end of the first rotating arm 5 away from the cantilever mounting base 4 via a rotary joint assembly 9. The second rotating arm 6 is equipped with a hook 10 for connecting the hoisted object. Through the above structural design, the first rotating arm 5 and the second rotating arm 6 can achieve multi-angle rotation, thereby adapting to hoisting needs with different area restrictions.

[0021] Furthermore, the bracket 7 is fixedly connected to the upper end of the square column 1, and an electric hoist 8 is installed on the bracket 7. The output end of the electric hoist 8 is connected to the upper end of the cantilever mounting base 4 via a chain or wire rope. The electric hoist 8 drives the cantilever mounting base 4 to move up and down along the linear guide rail 2 by winding and unwinding the chain or wire rope. When the electric hoist 8 is started, the chain or wire rope is wound or released, thereby pulling the cantilever mounting base 4 to move on the linear guide rail 2. Since the first swing arm 5 and the second swing arm 6 are both fixed to the cantilever mounting base 4, they will rise and fall synchronously with the movement of the cantilever mounting base 4. This lifting method avoids the traditional use of connecting the lifted object with a flexible rope extension, significantly reducing the swing amplitude of the lifted object during movement and reducing the risk of collision between the lifted object and surrounding loading equipment.

[0022] Preferably, the rotary joint assembly 9 is a key component for achieving the hinge connection between the first rotating arm 5 and the second rotating arm 6. Its specific structure includes a first bushing 11, a first bearing 12, a first rotating shaft 13, and two connecting plates 14. The first bushing 11 is fixedly mounted on the front end of the first rotating arm 5. The first rotating shaft 13 is rotatably connected to the inner side of the first bushing 11 via the first bearing 12. The upper and lower ends of the first rotating shaft 13 extend out of the first bushing 11 and are respectively fixedly connected to the connecting plates 14. The second rotating arm 6 is fixedly connected between the two connecting plates 14. The gap between the first bearing 12 and the first rotating shaft 13 is precision machined to ensure that the first rotating shaft 13 can rotate smoothly within the first bushing 11. Furthermore, a certain gap is left between the first bushing 11 and the second rotating arm 6. This gap design allows the second rotating arm 6 to have a larger angle range during rotation, further improving the flexibility of the lifting operation.

[0023] To prevent damage to the load caused by excessive speed during the rotation of the second boom 6, this invention also includes a damping component 15. The damping component 15 comprises a connecting block 16, an adjusting bolt 17, a spring 18, and a friction block 19. The connecting block 16 is fixed to the outside of the first bushing 11, and has an inner cavity communicating with the inside of the first bushing 11. The adjusting bolt 17 extends into the inner cavity and is threadedly connected to the connecting block 16. The spring 18 is positioned between the friction block 19 and the adjusting bolt 17, with the end of the friction block 19 away from the adjusting bolt 17 sliding against the first shaft 13. When increased rotational resistance is required, the operator can use a wrench or other tools to rotate the adjusting bolt 17, pushing it towards the inner cavity and compressing the spring 18. This increases the contact pressure between the friction block 19 and the first shaft 13, generating greater friction and slowing down the rotation speed of the second boom 6. Two damping elements 15 are provided, located on the upper and lower sides of the first rotating shaft 13 respectively. The symmetrical arrangement design ensures that the second rotating arm 6 experiences uniform resistance during rotation, guaranteeing a smooth and reliable rotation process. In this embodiment, the friction block 19 can be made of polyurethane material, which has excellent wear resistance and elasticity. The specific formula will not be elaborated here.

[0024] Furthermore, a limiting block 20 is fixedly provided on the inner side of the connecting plate 14. The limiting block 20 is an elastic element. When the second rotating arm 6 rotates towards the first rotating arm 5 to a certain angle, the limiting block 20 contacts the first rotating arm 5 to avoid direct collision and damage. The limiting block 20 is made of rubber or other elastic materials, and its thickness and arrangement position are precisely calculated to ensure that the second rotating arm 6 will not impact the first rotating arm 5 when it reaches its maximum rotation angle.

[0025] Preferably, the second rotating arm 6 is equipped with a slide rail 21, and the hook 10 is slidably connected to the slide rail 21. The design of the slide rail 21 allows the hook 10 to slide horizontally on the second rotating arm 6, thereby adjusting the position of the hoisted object. A ball bearing or slider 3 structure is used between the slide rail 21 and the hook 10 to ensure that the hook 10 can move smoothly on the slide rail 21 without significant jamming; this is existing technology and will not be elaborated upon here. Through the design of the slide rail 21, the operator can fine-tune the position of the hoisted object according to actual needs.

[0026] The first rotating arm 5 is hinged to the cantilever mounting base 4 through the second bushing, the second rotating shaft, the second bearing, etc. This is existing technology and will not be described in detail here.

[0027] In practical applications, the working principle of this utility model is as follows: First, the operator fixes the object to be lifted onto the hook 10, ensuring that the center of gravity of the object is aligned with the center line of the second boom 6. Then, the electric hoist 8 is started, pulling the cantilever mounting base 4 upwards along the linear guide rail 2 via a chain or wire rope, thereby raising the first boom 5 and the second boom 6 as a whole. The operator can first control the first boom 5 to approach the target position. If the space at the target position is narrow, for example, if the loading opening width of the object does not allow the first boom 5 to continue rotating, the operator can manually hold the object while simultaneously rotating the second boom 6, causing it to perform a secondary folding operation around the front end of the first boom 5. The shorter second boom 6 can then be used to continue rotating, extending the object into the target position. During this process, the damping component 15 adjusts the rotation resistance of the second boom 6 according to actual needs, preventing the object from being bumped or damaged due to excessive rotation. Finally, once the object has fully entered the target position, the operator will unload it from hook 10, completing one hoisting operation.

[0028] By comprehensively applying the above technical solutions, this utility model effectively solves the technical problems of easy swinging and collision of the hoisted object during the hoisting process of traditional cantilever cranes, and at the same time significantly improves the operational flexibility and safety of the hoisting equipment.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lifting hoist folding arm crane, characterized in that, The device includes a square column, a first rotating arm, and a second rotating arm. A linear guide rail is longitudinally fixed on one side of the square column, and a slider is slidably connected to the linear guide rail. A cantilever mounting base is fixedly connected to the slider, and a first rotating arm is hinged to the cantilever mounting base. A second rotating arm is hinged to the end of the first rotating arm away from the cantilever mounting base via a rotary joint assembly, and a hook is provided on the second rotating arm. A bracket is fixedly connected to the upper end of the square column, and an electric hoist is mounted on the bracket. The output end of the electric hoist is connected to the upper end of the cantilever mounting base to drive the cantilever mounting base to move on the linear guide rail.

2. A lifting hoist folding arm crane according to claim 1, characterized in that... The rotary joint assembly includes a first bushing, a first bearing, a first rotating shaft, and a connecting plate. The first bushing is fixed to the front end of the first rotating arm. The first rotating shaft is rotatably connected to the inside of the first bushing through the first bearing. The upper and lower ends of the first rotating shaft extend out of the first bushing and are respectively fixedly connected to the connecting plate. The second rotating arm is fixedly connected between the two connecting plates.

3. A lifting hoist folding arm crane according to claim 2, characterized in that... It also includes a damping component, which includes a connecting block, an adjusting bolt, a spring, and a friction block. The connecting block is fixed to the outside of the first bushing, and an inner cavity is formed inside the connecting block that is the inside of the first bushing. The adjusting bolt extends into the inner cavity and is threadedly connected to the connecting block. The spring is disposed between the friction block and the adjusting bolt, and the end of the friction block away from the bolt slides against the first rotating shaft.

4. A lifting hoist folding arm crane according to claim 3, characterized in that... Two damping components are provided.

5. A lifting hoist folding arm crane according to claim 2, characterized in that... There is a gap between the first bushing and the second rotating arm.

6. A lifting hoist folding arm crane according to claim 2, characterized in that... A limiting block is fixed on the inner side of the connecting plate.

7. A lifting hoist folding arm crane according to claim 1, characterized in that... The second rotating arm is provided with a slide rail, and the hook is slidably connected to the slide rail.

Images