Hoisting device with rotation angle limitation and buffering function

Abstract

The utility model relates to hoisting equipment technical field especially, relates to a hoisting device with rotation angle restriction and buffer function. Its including stand, base and electric hoist, the stand is installed vertically on the base, the stand top end is connected with horizontal outward divergent and rotatable installation of base arm through rotating component, the base arm end is rotatable installation with forearm through rotating component, still include spacing module, spacing module includes the base arm spacing module for limiting the rotation angle of base arm and the forearm spacing module for limiting the rotation angle of forearm. The utility model has the beneficial effect that: the technical scheme through the optimization layout of stand, base, forearm and electric hoist, realized the stable lifting and safe movement to heavy object. Hoisting device through the accurate restriction of rotation angle and the introduction of buffer function, significantly improved the safety and reliability of equipment, is applicable to various need hoisting and moving heavy object's scene.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a lifting device with rotation angle limiting and buffering functions. Background Technology

[0002] The structure of a folding boom crane mainly consists of a column, articulated boom, upper pin, lower pin, boom end support, and hand chain hoist.

[0003] The prior art, authorized by CN202310772863.X, discloses a cylindrical articulated boom cantilever crane, which realizes the rotation between the articulated booms through a pin. However, due to site limitations, it is necessary to limit the angle of cantilever rotation to ensure that there is no collision during transmission rotation.

[0004] Therefore, it is necessary to design a lifting device with rotation angle limiting and buffering functions to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a lifting device with rotation angle limiting and buffering functions to overcome the above-mentioned shortcomings of the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A lifting device with rotation angle limiting and buffering functions includes a column, a base and an electric hoist. The column is vertically installed on the base. The feature is that: a horizontally outwardly extending base arm is connected to the top of the column and is rotatably installed via a rotating component. A forearm is rotatably installed at the end of the base arm via a rotating component. It also includes a limiting module, which includes a base arm limiting module for limiting the rotation angle of the base arm and a forearm limiting module for limiting the rotation angle of the forearm.

[0007] Preferably, the electric hoist is installed at the end of the forearm.

[0008] Preferably, the base arm limiting module is installed between the column and the base and fixed by multiple bolts.

[0009] Preferably, a mechanical stop is installed on the base arm limiting module, and an oblong hole for installing the mechanical stop is provided on the base arm limiting module. The mechanical stop can be adjusted in position along the oblong hole and fixed by a nut. The mechanical stop is set within the path of the base arm's rotation radius range.

[0010] Preferably, the base arm limiting module has a central hole in the middle for avoiding the installation of the rotating component.

[0011] Preferably, the forearm limiting module is installed between the forearm and the base arm and fixed by multiple bolts.

[0012] Preferably, a first mechanical stop is installed on the forearm limiting module, and a first waist-shaped hole for installing the first mechanical stop is provided on the forearm limiting module. The first mechanical stop can be adjusted in position along the first waist-shaped hole and fixed by a nut. The first mechanical stop is set within the path of the rotation radius range of the forearm.

[0013] Preferably, a base arm limit position buffer block is provided on the outer circumferential surface of the column, and is within the radius of the base arm rotation circumference.

[0014] Preferably, a forearm limit position buffer block is provided on the outer surface of the base arm, and is within the circumferential radius of the forearm rotation.

[0015] The beneficial effects of this utility model are as follows: This technical solution achieves stable lifting and safe movement of heavy objects through the optimized layout of the column, base, forearm, and electric hoist. The lifting device significantly improves the safety and reliability of the equipment by precisely limiting the rotation angle and introducing a buffer function. It is suitable for various scenarios requiring the lifting and movement of heavy objects and has broad application prospects. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a lifting device with rotation angle limiting and buffering functions according to the present invention; Figure 2 This is a front view of a lifting device with rotation angle limiting and buffering functions according to the present invention; Figure 3 This is a top view of a lifting device with rotation angle limiting and buffering functions according to the present invention; Figure 4 This is a schematic diagram of the base arm limiting module of a lifting device with rotation angle limiting and buffering functions according to this utility model; Figure 5 This is a schematic diagram of the forearm limiting module of a lifting device with rotation angle limiting and buffering functions according to the present invention. Figure 6 This is a schematic diagram illustrating the folding and use of a lifting device with rotation angle limiting and buffering functions according to this utility model. In the diagram: 1. Column; 2. Base; 3. Base arm; 4. Forearm; 5. Electric hoist; 6. Base arm limiting module; 7. Forearm limiting module; 8. Base arm extreme position buffer; 9. Forearm extreme position buffer block; 61. Mechanical stop; 62. Arc groove; 63. Shaft hole; 71. First mechanical stop; 72. Second waist-shaped groove. Detailed Implementation

[0017] Reference Figures 1 to 6 A lifting device with rotation angle limiting and buffering functions includes a column 1, a base 2, a base arm 3, a forearm 4, an electric hoist 5, a base arm limiting module 6, a forearm limiting module 7, a base arm extreme position buffer block 8, and a forearm extreme position buffer block 9. These components, through reasonable layout and connection design, together constitute a lifting device capable of stable lifting and safe movement of heavy objects. The top of the column 2 is connected to a horizontally outwardly extending base arm 3 that can be rotatably mounted via a rotating assembly. The end of the base arm 3 is rotatably mounted with a forearm 4 via a rotating assembly. The rotating assembly can be referred to in the prior art, in the patent announcement number CN202310772863.X, which discloses a cylindrical articulated arm folding arm cantilever crane.

[0018] The upright column 1 is vertically mounted on the base 2, and its main function is to provide support for the entire device. To ensure a firm and reliable connection between the upright column 1 and the base 2, high-strength bolts are used for connection. This connection method not only improves the overall stability of the device but also effectively withstands various loads generated during lifting. The base 2 is located at the bottom of the device and is connected to the ground or other fixed structures to further enhance overall stability. The design of the base 2 fully considers the installation requirements under different usage scenarios. For example, the base 2 can be firmly fixed to the ground with anchor bolts, thereby preventing displacement of the device due to external impacts or vibrations.

[0019] Meanwhile, in order to further improve the stability of the entire base column 1, the base 2 and the column 1 are connected by reinforcing ribs, thereby ensuring the connection strength between the column 1 and the base 2 and ensuring strength.

[0020] The base arm 3 extends horizontally and connects to the column 1 for supporting and moving heavy objects. The connection between the base arm 3 and the column 1 adopts a flexible structural design to ensure that the base arm 3 can rotate during operation.

[0021] The electric hoist 5 is installed at the end of the forearm 4 and uses a wire rope or chain to lift and lower heavy objects. The design of the electric hoist 5 optimizes the guide path of the chain or wire rope, enabling the heavy object to move smoothly during lifting and lowering, and avoiding accidents caused by chain swaying or deviation.

[0022] To effectively control the rotation angle of the base arm 3 and the forearm 4, this invention includes a base arm limiting module 6 and a forearm limiting module 7. The base arm limiting module 6 is installed between the column 1 and the base arm 3. The specific installation steps are as follows: S1, multiple bolt holes are pre-machined between the column 1 and the base arm 3 for installing the base arm limiting module 6; S2, the base arm limiting module 6 is fixed to the common connection point of the column 1 and the base arm 3 using high-strength bolts to ensure it does not loosen during operation. The base arm limiting module 6 includes a set of mechanical stops 61. Corresponding arc-shaped grooves 62 are formed on the base arm limiting module 6. The position of the arc-shaped grooves 62 is precisely calculated within the range of base arm movement. The mechanical stops 61 are fixed in the arc-shaped grooves 62, acting as a limit within the rotation range of the base arm, preventing the base arm from exceeding a set value of 135° during rotation. This mechanical stop 61 is not only simple and reliable, but also can quickly respond to the rotation of the base arm 3, thereby realizing the real-time angle limiting function.

[0023] The base arm limiting module 6 has a central hole 63 in the middle for mounting with a rotating shaft. During installation, the central hole 63 is used to avoid the rotating shaft, leaving clearance. The arc-shaped groove 62 of the base arm limiting module 6 is partially exposed between the column 1 and the base arm 3, and is not blocked by the column 1 and the base arm 3, so as to ensure that the mechanical stop 61 is within the rotation range of the base arm after installation.

[0024] The forearm limiting module 7 is installed at the common connection end of the base arm 3 and the forearm 4. The specific installation steps are as follows: S1, multiple bolt holes are machined between the forearm 4 and the base arm 3 for installing the forearm limiting module 7; S2, the forearm limiting module 7 is fixed with high-strength bolts to ensure it can withstand the torque generated by the forearm 4 during operation. The forearm limiting module 7 also includes a set of first mechanical stops 71, and a first arc-shaped groove 72 is also provided on the forearm limiting module 7 for installing the first mechanical stops 72. The installation position is precisely calculated so that the forearm 4 cannot exceed a set value of 135° during rotation. Furthermore, both the base arm limiting module 6 and the forearm limiting module 7 are adjustable. The operator can adjust the rotation angle limit value according to actual needs, moving and fixing the first mechanical stops 71 along the first arc-shaped groove 72 to different positions to adapt to different working scenarios, thereby achieving a flexible angle limiting function.

[0025] The base arm limit position buffer block 8 is installed on the outer circumferential surface of the column 1 and is within the rotational circumference diameter of the base arm 3. The forearm limit position buffer block 9 is installed on the outer surface of the base arm 3 and is within the rotational circumference diameter of the forearm 4. When the base arm 3 or the forearm 4 rotates to its maximum angle, the buffer block absorbs the impact force through the elastic material, thereby reducing the damage to the equipment caused by hard collisions. The specific installation steps of the base arm limit position buffer block 8 are as follows: S1, a buffer block mounting groove is reserved near the base arm limit module 8, i.e., on the surface of the column 1, for installing the base arm limit position buffer block 8; S2, the base arm limit position buffer block 8 is fixed in the mounting groove by adhesive or bolts to ensure that it will not fall off when subjected to impact. The forearm limit position buffer block 9 is located near the base arm 3, i.e., on the outer surface of the base arm 3. When the forearm 4 rotates to its maximum angle, the buffer block also achieves a buffering effect through the elastic material. The specific installation steps of the forearm limit position buffer block 9 are as follows: S1, reserve a buffer block installation groove near the forearm limit module 9 for installing the forearm limit position buffer block 9; S2, fix the forearm limit position buffer block 9 in the installation groove to ensure that it can effectively absorb the impact force when the forearm 4 reaches the maximum rotation angle.

[0026] Both the base arm limit position buffer block 8 and the forearm limit position buffer block 9 are made of highly elastic materials, such as polyurethane or rubber. This material is chosen based on its excellent elasticity and fatigue resistance, enabling it to quickly absorb energy and return to its original shape upon impact, thus preventing performance degradation due to long-term use. Furthermore, the buffer block design fully considers ease of installation and maintenance, such as easy replacement and repair through adhesive or bolt fixing.

[0027] In actual operation, the lifting device of this invention, through the synergistic action of the limiting module and the buffer block, achieves precise limitation of the rotation angle of the base arm and forearm, as well as effective absorption of impact force. For example, when an operator needs to move a heavy object from one position to another, the electric hoist 5 is first started, and the heavy object is lifted to a certain height via a chain or wire rope. Subsequently, the operator controls the rotation of the base arm and forearm to move the heavy object above the target position. During this process, the base arm limiting module 6 and the forearm limiting module 7 monitor the rotation angle of the base arm and forearm in real time to ensure that it does not exceed the angle setting value. If the base arm or forearm approaches the maximum rotation angle, the base arm limit position buffer block 8 and the forearm limit position buffer block 9 will intervene in advance, absorbing the impact force through elastic materials, thereby avoiding damage to the equipment and operators caused by hard collisions.

[0028] The advantages of this utility model are that, through the optimized layout of the column 1, base 2, base arm 3, forearm 4, and electric hoist 5, stable lifting and safe movement of heavy objects are achieved. The lifting device, by precisely limiting the rotation angle and introducing a buffer function, significantly improves the safety and reliability of the equipment, making it suitable for various scenarios requiring the lifting and movement of heavy objects, and has broad application prospects.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lifting device with rotation angle limiting and buffering functions, comprising a column, a base, and an electric hoist, wherein the column is vertically installed on the base, characterized in that: The top of the column is connected to a horizontally outwardly extending base arm that can be rotatably mounted via a rotating assembly, and the end of the base arm is rotatably mounted with a forearm via a rotating assembly. It also includes a limiting module, which includes a base arm limiting module for limiting the rotation angle of the base arm and a forearm limiting module for limiting the rotation angle of the forearm.

2. The lifting device with rotation angle limiting and buffering functions according to claim 1, characterized in that: The electric hoist is installed at the end of the forearm.

3. A lifting device with rotation angle limiting and buffering functions according to claim 1, characterized in that: The base arm limiting module is installed between the column and the base and is fixed by multiple bolts.

4. A lifting device with rotation angle limiting and buffering functions according to claim 1, characterized in that: A mechanical stop is installed on the base arm limiting module. An oblong hole for installing the mechanical stop is provided on the base arm limiting module. The mechanical stop can be adjusted along the oblong hole and fixed by a nut. The mechanical stop is set within the path of the base arm's rotation radius.

5. A lifting device with rotation angle limiting and buffering functions according to claim 4, characterized in that: The base arm limiting module has a central hole in the middle for avoiding the installation of the rotating component.

6. A lifting device with rotation angle limiting and buffering functions according to claim 1, characterized in that: The forearm limiting module is installed between the forearm and the base arm and is fixed by multiple bolts.

7. A lifting device with rotation angle limiting and buffering functions according to claim 6, characterized in that: A first mechanical stop is installed on the forearm limiting module. A first waist-shaped hole for installing the first mechanical stop is provided on the forearm limiting module. The first mechanical stop can be adjusted along the first waist-shaped hole and fixed by a nut. The first mechanical stop is set within the path of the rotation radius range of the forearm.

8. A lifting device with rotation angle limiting and buffering functions according to claim 1, characterized in that: A base arm limit position buffer block is provided on the outer circumferential surface of the column, and is within the radius of the base arm rotation circumference.

9. A lifting device with rotation angle limiting and buffering functions according to claim 1, characterized in that: A forearm limit position buffer block is provided on the outer surface of the base arm, and is located within the circumferential radius of the forearm rotation.

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