Crane sling with fine adjustment mechanism

Abstract

The utility model discloses a crane lifting appliance with a fine adjustment mechanism, a plurality of groups of symmetrical carrying pole beams are distributed on the lifting appliance, the middle part of each carrying pole beam is rotatably connected with the lifting appliance through a shaft fulcrum structure, lifting arms at two ends of each carrying pole beam extend out of the lifting appliance, and the lifting appliance further comprises the fine adjustment mechanism; at least one group of symmetrical carrying pole beams are provided with two symmetrical fine adjustment mechanisms; the fine adjustment mechanism comprises a lifting device and a control set. The number of the lifting devices is two, the two lifting devices are symmetrically distributed below the lifting arms at the two ends of the carrying pole beam, each lifting device comprises a power part and a lifting piece, the power parts are fixedly erected on the lifting appliance and are in driving connection with the lifting pieces, and the movement directions of the lifting pieces face the lifting arms; the control set controls operation of the lifting device. According to the utility model, the horizontal heights of the four corners of the hoisted object are adjusted through the fine adjustment mechanism, so that the height errors of the four corners of the hoisted object are minimum.

Description

Technical Field

[0001] The utility model relates to a sling, in particular to a crane sling with a fine-adjustment mechanism. Background Art

[0002] Some construction fields require the use of cranes, which can lift heavy precast concrete parts.

[0003] Currently, some suspended objects (mostly precast concrete components) are installed using traditional cranes. This can easily lead to inconsistent heights at the four corners of the suspended object because they are not aligned. Consequently, during installation, any misalignment of the suspended object can cause a sharp corner to damage or break the sealing strip, rendering it ineffective.

[0004] In view of this, it is necessary to improve the existing spreader. Utility Model Content

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a crane sling with a fine-tuning mechanism. The purpose of designing the crane sling is to adjust the height of the four corners of the suspended object through the fine-tuning mechanism, so as to minimize the horizontal height error of the four angles of the suspended object, thereby protecting the sealing strip from damage or protecting the sharp corners from being pulled.

[0006] To solve the above technical problems, the present invention is implemented through the following solution: a crane sling with a fine-tuning mechanism is provided in the present invention. The sling has a center of the sling as a symmetrical point, and a plurality of symmetrical shoulder beams are distributed on the sling. Each shoulder beam is perpendicular to the length direction of the sling and the middle of each shoulder beam is rotatably connected to the sling with an axis as a fulcrum. Both ends of the shoulder beams extend out of the sling. The sling also includes a fine-tuning mechanism.

[0007] At least one group of symmetrical shoulder beams is equipped with two symmetrically arranged fine-adjustment mechanisms;

[0008] The fine-tuning mechanism comprises:

[0009] There are two lifting devices, which are symmetrically distributed below the booms at both ends of the shoulder beam. The lifting devices include a power unit and a lifting member. The power unit is fixed to the sling and drives the lifting member. The lifting member moves toward the boom.

[0010] A control group controls the operation of the lifting device.

[0011] Furthermore, the sling is a rotating sling.

[0012] Furthermore, the rotating sling includes a first sling beam and a second sling beam rotatably connected to the first sling beam, and the length of the first sling beam is greater than the length of the second sling beam.

[0013] Furthermore, the power unit includes one of a cylinder power source and an electric power source.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model crane sling is provided with a fine adjustment mechanism on a pair of symmetrical shoulder beams. The fine adjustment mechanism is used to adjust the horizontal height of the four corners of the hoisted object to minimize the horizontal height error of the four corners of the hoisted object, thereby protecting the sealing strip, preventing the sealing strip from being damaged, and preventing the sharp corners of the hoisted object from being pulled.

[0016] 2. The utility model sling controls the swing of the shoulder pole beam through a fine-tuning mechanism. Since the four connection points of the shoulder pole beam are correspondingly connected to the four corners of the object to be hoisted, the horizontal height of the four corners of the object to be hoisted is controlled by fine-tuning the swing angles of the two shoulder pole beams, so that the object to be hoisted can be accurately installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the structural diagram of the sling of the utility model.

[0018] Figure 2 This is a structural diagram of the fine-tuning mechanism of the utility model.

[0019] Markings in the accompanying drawings: first hanging beam 1 , second hanging beam 2 , shoulder pole beam 3 , fine-tuning mechanism 6 , power unit 61 , lifting component 62 , control group 63 . DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more specific definition of the scope of protection of the present invention. Obviously, the embodiments described in the present invention are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] Example 1: The specific structure of the utility model is as follows:

[0023] Please refer to the attached Figure 1-2The utility model is a crane sling with a fine-tuning mechanism, with the center of the sling as the symmetry point, and multiple groups of symmetrical shoulder beams 3 are distributed on the sling. Figure 1 As shown, the sling is a rotary sling. It includes a first sling beam 1 and a second sling beam 2 rotatably connected to the first sling beam 1. The first sling beam 1 is longer than the second sling beam 2. Both ends of the upper end surface of the second sling beam 2 are provided with axle holes for connecting to rigging. The lengths of the first and second sling beams 1 and 2 are designed according to requirements. Multiple lifting points are designed based on the length of the load being lifted. These lifting points are referred to as multiple shoulder beams 3.

[0024] The second lifting beam 2 has a removable pin in its pivot hole. This allows the hook to be removed and used independently after the sling is disassembled. The removable pin has a diameter of 120mm-300mm and weighs 26.7kg. It features a removal handle on one side and a key plate on the other, allowing for quick removal by a single person.

[0025] Each shoulder beam 3 is perpendicular to the length direction of the sling and the middle of each shoulder beam 3 is rotatably connected to the sling with an axis as a fulcrum. The lifting arms at both ends of the shoulder beam 3 extend out of the sling. The sling also includes a fine-tuning mechanism; at least one group of symmetrical shoulder beams 3 is equipped with two symmetrically arranged fine-tuning mechanisms 6. Figure 1 As shown, four shoulder pole beams 3 are mounted on the first hanging beam 1, wherein a group of two symmetrical shoulder pole beams 3 are located at both ends of the first hanging beam 1, and the other two symmetrically arranged shoulder pole beams 3 are arranged on the beam body of the first hanging beam 1. The shoulder pole beams 3 at the two outer ends are each provided with a fine adjustment mechanism 6.

[0026] The fine-tuning mechanism 6 includes a lifting device and a control group 63 .

[0027] There are two lifting devices, which are symmetrically distributed below the two ends of the boom beam 3. The lifting device includes a power unit 61 and a lifting member 62. The power unit 61 is fixed to the sling and drives the lifting member 62. The movement direction of the lifting member 62 is toward the boom. Figure 2 As shown, the lifting member 62 is a cylindrical structure, which is connected to the power unit 61 via a movable shaft. The power unit 61 drives the movable shaft to extend and retract to achieve the purpose of lifting the lifting member 62. The control group 63 controls the operation of the lifting device.

[0028] The power unit 61 includes a cylinder power source or an electrical power source. The present invention preferably uses a hydraulic drive mechanism, i.e., the power unit 61 is preferably a cylinder power source. The control group 63 is a hydraulic control device that controls the oil level in the cylinder power source, thereby controlling the raising and lowering of the lifting member 62, thereby achieving the purpose of fine-tuning the height of the two sides of the shoulder beam 3.

[0029] like Figure 1As shown, the present invention also provides a method for fine-tuning a sling, which comprises the following steps:

[0030] Step 1: The second lifting beam 2 of the sling is connected to the crane through the first lifting cable system, and the object to be lifted is connected to the lifting holes of each shoulder beam 3 of the first lifting beam 1 through the second lifting cable system.

[0031] Step 2: Lift the sling through the crane's lifting mechanism to lift the object.

[0032] Step 3: During the docking and installation of the suspended object, the control group 63 controls the operation of the lifting device, and the lifting members 62 on the lifting device fine-tune the heights of the four corners of the shoulder beam 3, thereby minimizing the horizontal height errors of the four corners of the suspended object.

[0033] Specifically, when one corner of the suspended object is lower than the other corners, the control group 63 on the low side controls the power unit 61 corresponding to the low angle to operate, so that the boom at the low angle rises a certain distance, thereby minimizing the horizontal height error of the four corners.

[0034] When the four corners of the suspended object are obviously not at the same level, it is necessary to control the four power units 61 to operate in a coordinated manner until the level errors of the four corners of the suspended object are reduced to a minimum.

[0035] Step 4: After adjusting the four corners of the suspended object, the docking is completed, the suspended object is installed, and the sling is withdrawn.

[0036] In summary, the four lifting devices can adjust the tilt of the suspended object to make it straight, and the operation of a single lifting device can adjust the height of a single angle of the suspended object.

[0037] This crane sling features a pair of symmetrical shoulder beams equipped with fine-tuning mechanisms. These mechanisms adjust the horizontal height of the four corners of the object being hoisted, minimizing errors in the horizontal heights of the four corners. The sling's fine-tuning method uses the fine-tuning mechanism to control the swing of the shoulder beams. Since the four connection points of the shoulder beams are connected to the four corners of the object being hoisted, fine-tuning the swing angles of the two shoulder beams controls the horizontal heights of the four corners of the object being hoisted, enabling precise installation of the object.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A crane sling with a fine-tuning mechanism, with the center of the sling as a symmetrical point, and multiple groups of symmetrical shoulder beams (3) distributed on the sling, each shoulder beam (3) is perpendicular to the length direction of the sling and the middle of each shoulder beam (3) is rotatably connected to the sling with an axis as a fulcrum, and the booms at both ends of the shoulder beam (3) extend out of the sling, characterized in that: The spreader also includes a fine-tuning mechanism; At least one group of symmetrical shoulder beams (3) is equipped with two symmetrically arranged fine-tuning mechanisms (6); The fine-tuning mechanism (6) comprises: Two lifting devices are provided, and the two lifting devices are symmetrically distributed below the booms at both ends of the shoulder beam (3). The lifting devices include a power unit (61) and a lifting member (62). The power unit (61) is fixed to the sling and drives the lifting member (62). The lifting member (62) moves in a direction toward the boom. The control group (63) controls the operation of the lifting device.

2. The crane spreader with a fine-tuning mechanism according to claim 1, characterized in that: The sling is a rotary sling.

3. The crane spreader with a fine-tuning mechanism according to claim 2, characterized in that: The rotary sling comprises a first sling beam (1) and a second sling beam (2) rotatably connected to the first sling beam (1), wherein the length of the first sling beam (1) is greater than the length of the second sling beam (2).

4. The crane spreader with a fine-tuning mechanism according to claim 1, characterized in that: The power unit (61) includes a cylinder power source and an electric power source.

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