Novel unloading device

Abstract

The utility model discloses a novel unloading device which comprises an outer sleeve, an inner sleeve and a rotating seat, and a steel wire rope seat is arranged at the bottom of the outer sleeve; the outer sleeve and the inner sleeve are screwed into a whole, a reducing area is arranged in the inner sleeve, and a bearing is arranged between the inner sleeve and the rotating seat; the rotating seat comprises a top hook part and a lower suspending and screwing part, an internal locking piece is fixedly arranged on the lower suspending and screwing part in a suspending and screwing manner, and a pressure bearing is arranged between the internal locking piece and the reducing area. The outer sleeve, the inner sleeve and the rotating base can be machined through existing lathe equipment, the manufacturing cost is low, and assembling and disassembling are convenient. Furthermore, a positioning hole is formed in the outer wall of the internal locking piece, a positioning lock corresponding to the positioning hole is arranged on the outer sleeve, and rotary locking between the outer sleeve and the rotary seat is achieved through matching of a lock bolt on the positioning lock and the positioning hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of crane accessories, and in particular relates to a novel unloader. Background Art

[0002] As is known to all, when a crane is lifting an object, a wire rope is usually hung on the hook of the lifting boom, and the connection between the hook and the heavy object is achieved through the wire rope. In order to improve the stability and safety of the lifting process, technical personnel in this field will use two or more strands of wire ropes in an overlapping manner to avoid the instability of a single wire rope. However, when two or more strands of wire ropes are overlapped for lifting, the double-strand wire rope will cause torque release due to its own spiral structure. During the torque release process, the wire rope will rotate itself as the lifting is carried out, and the torque will be transmitted to the hook or the lifting boom during the rotation process. In this process, the hook and the lifting boom are both subject to greater safety risks, which may cause component damage or even serious safety accidents.

[0003] Technicians in this field have developed a force unloader for a hook, which arranges a pressure bearing between the fixed end of the wire rope and the fixed end of the boom, and realizes rotation between the two through the pressure bearing. This structure can release the rotational force of the wire rope and prevent it from being transmitted to the lifting boom, thereby protecting the lifting boom.

[0004] Although the above device has the effect of releasing the rotational force to a certain extent, in actual production and use, this type of hook unloader has many accessories and a complex structure, and needs to be fixed at multiple points using pins. However, the pins are usually assembled with a large tolerance, and this design is prone to falling off, causing safety hazards. Furthermore, the wire rope is fixed in an internal loop, and this structure must be assembled in the production unit with the help of special equipment, which has high assembly costs and poor versatility.

[0005] In view of the shortcomings of the existing technology, how to improve the technology and design a new type of force unloader, which is assembled as a whole through a bolt combination structure. This assembly method is convenient and fast, and the disassembly is simple, and the internal components can be easily replaced and maintained. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a novel force unloader, which adopts threaded matching of multiple rotating body parts, is convenient for production, assembly and maintenance, does not affect the fixation of external steel wire ropes, and can improve the appearance of the product.

[0007] In order to achieve the above technical objectives, the utility model adopts the following scheme: a new type of force unloader, which includes an outer sleeve, an inner sleeve and a rotating seat, and a wire rope seat is arranged at the bottom of the outer sleeve; the outer sleeve and the inner sleeve are screwed together into one, a variable diameter area is arranged inside the inner sleeve, and a bearing is arranged between the inner sleeve and the rotating seat; the rotating seat includes a top hook part and a lower hanging part, an internal locking piece is hung and fixed on the lower hanging part, and a pressure bearing is arranged between the internal locking piece and the variable diameter area.

[0008] A bearing fixing cavity is arranged at the top of the inner sleeve, close to the rotating seat, and a bearing is arranged in the bearing fixing cavity.

[0009] The internal locking member is cylindrical, with a positioning hole on its outer wall, and a positioning lock is provided on the outer sleeve corresponding to the positioning hole, and the rotation locking between the outer sleeve and the rotating seat is achieved by the lock bolt on the positioning lock cooperating with the positioning hole.

[0010] The positioning lock includes an outer locking piece, a guide cylinder is fixed inside the outer locking piece, a locking bolt is arranged inside the guide cylinder, an elastic reset component is arranged between the locking bolt and the guide cylinder, a force cap is fixed to the outer end of the locking bolt, a rotation positioning slot is arranged on the guide cylinder, and a rotation positioning protrusion is arranged on the force cap to be plugged into the rotation positioning slot.

[0011] The locking bolt is provided with a fixing protrusion on its periphery, and the elastic reset component is fixed by the fixing protrusion.

[0012] There are multiple positioning holes evenly distributed on the outer wall of the internal locking piece.

[0013] The beneficial effects of the utility model are as follows: the utility model includes an outer sleeve, an inner sleeve and a rotating seat through the above structural setting, and a wire rope seat is arranged at the bottom of the outer sleeve; the outer sleeve and the inner sleeve are screwed together, a variable diameter area is arranged inside the inner sleeve, and a bearing is arranged between the inner sleeve and the rotating seat; the rotating seat includes a top hook part and a lower hanging part, an internal locking part is hung and fixed on the lower hanging part, and a pressure bearing is arranged between the internal locking part and the variable diameter area. The above outer sleeve, inner sleeve and rotating seat can be processed by existing lathe equipment, with low manufacturing cost and convenient assembly and disassembly; furthermore, the utility model is also provided with a positioning hole on the outer wall of the internal locking part, and a positioning lock is arranged on the outer sleeve corresponding to the positioning hole, and the rotation locking between the outer sleeve and the rotating seat is realized by the lock bolt on the positioning lock and the positioning hole. The operation mode of the utility model is simple and convenient, the operation safety is improved, and the disadvantages of many accessories, complex structure and easy failure in the prior art are overcome, and it is an ideal new type of unloader. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model (locking);

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model (unlocked);

[0016] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the utility model;

[0017] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0018] In the accompanying drawings, 1. outer sleeve, 2. wire rope seat, 21. lower fixing hole, 3. inner sleeve, 31. bearing fixing cavity, 32. variable diameter area, 4. rotating seat, 41. top hook part, 42. hook fixing hole, 43. positioning plate, 44. lower hanging part, 5. bearing, 6. positioning lock, 61. outer locking piece, 62. guide cylinder, 621. rotation positioning slot, 63. force cap, 631. rotation positioning protrusion, 64. locking bolt, 65. spring placement cavity, 66. fixing protrusion, 67. spring, 7. internal locking piece, 71. positioning hole, 8. thrust bearing. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0020] Embodiment 1:

[0021] A novel unloader, as shown in the attached drawings, comprises an outer sleeve 1, an inner sleeve 3 and a rotating seat 4. A wire rope seat 21 is provided at the bottom of the outer sleeve 1. A lower fixing hole 21 is provided on the wire rope seat 21 for fixing the wire rope.

[0022] The outer sleeve 1 and the inner sleeve 3 are screwed together into one body, a diameter-changing area 32 is provided inside the inner sleeve 3 , and a bearing 5 is provided between the inner sleeve 3 and the rotating seat 4 .

[0023] The rotating seat 4 is a stepped shaft, which includes a top hook portion 41 and a lower hanging portion 44, a positioning plate 43 is provided between the top hook portion 41 and the lower hanging portion 44, an internal locking member 7 is fixedly hung on the lower hanging portion 44, and a pressure bearing 8 is provided between the internal locking member 7 and the diameter-changing area 32. When the lower hanging portion 44 and the internal locking member 7 are screwed together, the positioning plate 43 is close to the top edge of the inner sleeve 3.

[0024] The internal locking member 7 is a cylindrical structure, and a plurality of positioning holes 71 are arranged on its outer wall. In the present embodiment, one positioning hole is designed for every 30 degrees, and a total of 12 positioning holes are evenly distributed. A positioning lock 6 is provided on the outer sleeve 1 corresponding to the positioning hole 71, and the rotational locking between the outer sleeve 1 and the rotating seat 4 is realized by plugging and cooperating the locking bolt 64 on the positioning lock 6 with the positioning hole 71. In order to realize the locking function, the utility model must allow the positioning lock 6 to have the function of retracting and releasing the locking bolt 64. In order to realize the above functions, the utility model also discloses a positioning lock with a two-point positioning function, and this positioning lock is used for both locking and opening functions. Its specific structure is as follows: Figure 3 , 4 As shown, the positioning lock 6 includes a peripheral locking member 61, and the peripheral locking member 61 is screwed together with the outer sleeve 1. A guide cylinder 62 is fixed to the internal thread of the peripheral locking member 61. A locking bolt 64 is arranged inside the guide cylinder 62. A spring placement cavity 65 is arranged between the locking bolt 64 and the guide cylinder 62, and a spring 67 is used as an elastic reset component 67. In the same area, a fixing protrusion 66 is arranged on the periphery of the locking bolt 64, and the spring 67 is constrained in the spring placement cavity 65 by the fixing protrusion 66.

[0025] The outer end of the locking bolt 64 is fastened with a force cap 63. After the utility model discloses the above structure, the locking bolt 64 can be controlled to enter and exit the positioning hole by pulling the force cap 63 from the outside, thereby realizing the control of whether the rotating seat 4 rotates or not. However, the above structure can only realize the positioning in the non-rotating state. When rotation is required, the force cap 63 must be pulled by hand to realize it. Therefore, the above function is imperfect in actual use. In order to improve the above, the utility model also has the following design: two rotation positioning grooves 621 are provided on the guide cylinder 62, and the force cap 63 is provided with a rotation positioning protrusion 631 that is plugged and matched with the rotation positioning groove 621. The two rotation positioning grooves 621 are arranged 180 degrees relative to each other, and the two rotation positioning protrusions 631 matched therewith are also arranged 180 degrees relative to each other. At this time, the positioning control can be realized by axially pulling the force cap 63 and then twisting it 90 degrees.

[0026] On this basis, the rotation positioning protrusion 631 and the rotation positioning slot 621 can be extended to more than two to achieve the same function.

[0027] In the utility model, when the bearing 5 is provided, the bearing fixing cavity 31 is arranged on the top surface of the inner sleeve 3, and a bearing fixing cavity is arranged near the rotating seat 4, and the bearing 5 is arranged in the bearing fixing cavity. The bearing 5 can assist the thrust bearing 8 to achieve sliding fit. When working, the thrust bearing 8 is used to achieve axial sliding pressure bearing, and the bearing 5 is used to achieve radial sliding pressure bearing.

[0028] In summary, the outer sleeve 1, inner sleeve 3 and rotating seat 4 mentioned above can be processed by existing lathe equipment, with low production cost and convenient assembly and disassembly; furthermore, the utility model also provides a positioning hole 71 on the outer wall of the internal locking member 7, and a positioning lock 6 is provided on the outer sleeve 1 corresponding to the positioning hole 71, and the rotational locking between the outer sleeve 1 and the rotating seat 4 is realized by the lock bolt 64 on the positioning lock 6 cooperating with the positioning hole 71.

[0029] The utility model has the advantages of simple and convenient operation, improved operation safety, and overcomes the drawbacks of many accessories, complex structure and easy failure in the prior art, and is an ideal new type of force unloader.

Claims

1. A new type of unloader, characterized by: It includes an outer sleeve, an inner sleeve and a rotating seat, a wire rope seat is arranged at the bottom of the outer sleeve; the outer sleeve and the inner sleeve are screwed together, a variable diameter area is arranged inside the inner sleeve, and a bearing is arranged between the inner sleeve and the rotating seat; the rotating seat includes a top hook part and a lower hanging part, an internal locking part is hung and fixed on the lower hanging part, and a pressure bearing is arranged between the internal locking part and the variable diameter area.

2. A novel force unloader as claimed in claim 1, characterized in that: A bearing fixing cavity is arranged at the top of the inner sleeve, close to the rotating seat, and a bearing is arranged in the bearing fixing cavity.

3. A novel force unloader as claimed in claim 1, characterized in that: The internal locking member is cylindrical, with a positioning hole on its outer wall, and a positioning lock is provided on the outer sleeve corresponding to the positioning hole, and the locking bolt on the positioning lock is plugged and matched with the positioning hole.

4. A novel force unloader as claimed in claim 3, characterized in that: The positioning lock includes an outer locking piece, a guide cylinder is fixed inside the outer locking piece, a locking bolt is arranged inside the guide cylinder, an elastic reset component is arranged between the locking bolt and the guide cylinder, a force cap is fixed to the outer end of the locking bolt, a rotation positioning slot is arranged on the guide cylinder, and a rotation positioning protrusion is arranged on the force cap to be plugged into the rotation positioning slot.

5. A novel force unloader as claimed in claim 4, characterized in that: The locking bolt is provided with a fixing protrusion on its periphery, and the elastic reset component is fixed by the fixing protrusion.

6. A novel force unloader as claimed in claim 3, characterized in that: There are multiple positioning holes evenly distributed on the outer wall of the internal locking piece.

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