Hoisting device

Abstract

The utility model discloses a hoisting device which comprises a hoisting part and a grabbing part, and the hoisting part comprises a hoisting ring which is arranged in a protruding manner. The grabbing part is fixedly arranged below the lifting part and comprises a grabbing assembly and a sliding sleeve which can be relatively opened, and the outer wall part of the grabbing assembly is movably sleeved with the sliding sleeve. The grabbing assembly comprises at least two grabbing units, the sliding sleeve can be rotationally adjusted in the axis direction of the grabbing assembly, and the end, away from the hanging ring, of the grabbing assembly is relatively opened or closed. A clamping part is arranged at the end, away from the hanging ring, of the grabbing assembly. According to the hoisting device, the sliding sleeves are arranged on the outer walls of the two grabbing units, the two grabbing units can be switched between the hooping state and the loosening state by sliding the sliding sleeves, and the hoisting device has the advantages of being safe, stable, high in efficiency and high in speed when hoisting a motor.

Description

Technical Field

[0001] The utility model relates to the field of assembly manufacturing, in particular to a hoisting device. Background Art

[0002] During the motor assembly process of some hybrid transmissions, the motor needs to be installed in the housing, but the motor only has one fulcrum, the back groove at the root of the spline, and it is necessary to consider using this fulcrum to complete the lifting. In addition, during the subsequent maintenance and inspection of the transmission, it is sometimes necessary to extract the motor from the housing for maintenance operations. However, since there is no structure on the dual clutch that is convenient for traditional hoists to connect, the operator needs to operate manually to lift it with the traditional hoist. Not only are there many problems such as cumbersome operation, heavy labor, and low work efficiency, but this method is also difficult to achieve a stable connection between the hoist and the dual clutch, and there are certain safety hazards. Therefore, in the prior art, there is a problem of inconvenient lifting and installation of the motor during the motor assembly process of the hybrid transmission. Utility Model Content

[0003] The utility model aims to solve the problem of inconvenient lifting and installation of the motor during the motor assembly process of the hybrid transmission in the prior art.

[0004] In order to solve the above technical problems, the embodiment of the utility model discloses a hoisting device, including a hoisting part and a grabbing part, wherein the hoisting part includes a protruding lifting ring. The grabbing part is fixedly arranged below the hoisting part, and the grabbing part includes a relatively openable grabbing assembly and a sliding sleeve, and the sliding sleeve can be movably sleeved on the outer wall of the grabbing assembly. The grabbing assembly includes at least two grabbing units, and the sliding sleeve can be rotated and adjusted along the axis direction of the grabbing assembly, so that the end of the grabbing assembly away from the lifting ring is relatively opened or closed. And a clamping part is arranged at the end of the grabbing assembly away from the lifting ring.

[0005] By adopting the above technical solution, a slidable sleeve is provided on the outer wall of the grabbing unit, thereby controlling the relative opening or closing of the two grabbing units, and clamping the motor through the clamping part. Specifically, when the clamping parts on the two grabbing units clamp the motor, the sleeve slides on the outer walls of the two grabbing units, and tightens the grabbing assembly so that the clamping part clamps the motor. At this time, the lifting part and the lifting ring cooperate with the crane or other lifting device, and then lift the motor for installation. Therefore, the lifting device disclosed in the present application can achieve the two grabbing units in a tightened state or a relaxed state by providing a sleeve on the outer wall of the two grabbing units, and has the advantages of safety, stability, high efficiency and high speed during lifting.

[0006] The embodiment of the utility model also discloses a hoisting device, wherein the sleeve comprises a threaded sleeve, the threaded sleeve is provided with an internal thread, and the outer wall of the grab assembly is provided with an external thread adapted to the internal thread. The internal thread of the threaded sleeve and the external thread of the grab assembly are adapted to be threadedly connected, and when the two grab units of the grab assembly need to be loosened or tightened, it can be achieved by rotating the threaded sleeve, and the structure is simple, and the threaded connection has the advantages of high stability.

[0007] The embodiment of the utility model further discloses a hoisting device, wherein the outer wall of the grab assembly is provided with an outer tapered thread, and the inner wall of the threaded sleeve is provided with an inner tapered thread adapted to the outer tapered thread. In the inner tapered thread formed on the inner wall of the threaded sleeve, along the axial direction of the threaded sleeve, the opening diameter of the inner tapered thread on the side close to the lifting part is larger than the opening diameter of the inner tapered thread on the side close to the clamping structure.

[0008] By adopting the above technical solution, mutually compatible external tapered threads and internal tapered threads are set. After the grabbing unit grabs the motor, when the threaded sleeve and the outer wall of the grabbing assembly are tightened, the threaded sleeve and the grabbing assembly are self-locked together through the self-locking characteristics of the tapered thread, further improving the connection stability and the safety of lifting.

[0009] The embodiment of the utility model also discloses a hoisting device, wherein the grabbing unit includes a grabbing sleeve, two grabbing sleeves are provided, the two grabbing sleeves are arranged opposite to each other and are both hollow semi-cylindrical, and the two grabbing sleeves are cylindrical when closed, and the sliding sleeve is sleeved on the outer periphery of the grabbing sleeve, away from one end of the lifting part. The clamping part is provided on the inner wall of the grabbing sleeve, near the opening.

[0010] By adopting the above technical solution, two semi-cylindrical grabbing sleeves are arranged relatively to each other. They are opened before hoisting the motor. After cooperating with the motor, the two grabbing sleeves are tightened by rotating the sliding sleeve. At this time, the clamping part is stably clamped on the retreat groove or other parts of the motor, so as to carry out subsequent hoisting, moving, installation and other work.

[0011] The embodiment of the utility model further discloses a lifting device, wherein the clamping portion at least comprises any one of a hook, a protrusion and a groove arranged on the inner wall of an end of a grabbing sleeve away from the lifting portion.

[0012] The embodiment of the utility model further discloses a lifting device, wherein an installation groove is provided at one end of the two grabbing sleeves close to the clamping part, and an elastic reset component is provided in the installation groove, wherein when the two grabbing sleeves are closed, the elastic reset component is in a compressed state.

[0013] By adopting the above technical solution, when the sliding sleeve tightens the two grabbing sleeves and closes (this is the grabbing state), the elastic reset component is in a compressed state. When the sliding sleeve releases the two grabbing sleeves, the two grabbing sleeves are separated from each other under the action of the elastic reset component, which is convenient for grabbing the motor next time.

[0014] The embodiment of the utility model also discloses a lifting device, wherein the lifting part further comprises a lifting ring transition shaft, and the lifting ring is detachably arranged at one end of the lifting ring transition shaft. The lifting ring comprises a circular lifting ear and a lifting ear shaft, the outer wall of the lifting ear shaft is provided with an external thread, and the inner wall of the lifting ring transition shaft is provided with an internal thread adapted to the external thread.

[0015] Furthermore, a central axis is provided at one end of the lifting ring transition shaft away from the lifting ring, and the central axis is detachably connected to the lifting ring transition shaft. A step connection portion is provided at one end of the central axis close to the grabbing sleeve, and the end of the grabbing sleeve close to the step connection portion is adaptably connected to the step connection portion.

[0016] By adopting the above technical solution, the provision of the lifting ring transition axis and the central axis can improve the stability and structural strength of the overall structure of the lifting device, and the provision of the step connection portion is convenient for connection and fixation.

[0017] The embodiment of the utility model further discloses a hoisting device, wherein a thrust bearing is arranged at one end of the lifting ring transition shaft close to the central shaft, and two thrust bearings are arranged at intervals along the axial direction of the lifting ring transition shaft.

[0018] By adopting the above technical solution, after the thrust bearing is set, it is ensured that the hoisting device can rotate freely after the motor is hoisted, and the position or angle of the motor can be adjusted during hoisting to facilitate the installation and assembly of the motor.

[0019] The embodiment of the utility model also discloses a lifting device, which also includes a top cover, which is detachably arranged on a side of the middle shaft close to the lifting ring, and the top cover is threadedly connected to the middle shaft. In addition, a thrust bearing is arranged between the top cover and the lifting ring transition shaft, and a thread glue is coated on the threaded connection part between the top cover and the middle shaft. The top cover can protect the middle shaft and the lifting ring transition shaft, and a thrust bearing is also arranged between the top cover and the lifting ring transition shaft to ensure that the lifting device can be rotated and adjusted.

[0020] The beneficial effects of the utility model are:

[0021] The utility model discloses a hoisting device, which controls the relative opening or closing of two grabbing units by arranging a slidable sleeve on the outer wall of a grabbing unit, and clamps the motor by the two grabbing units. By twisting the sleeve, the two grabbing units can be put in a clamped state or a loosened state, which has the advantages of safety, stability, high hoisting efficiency and high speed during hoisting. In addition, the threaded sleeve and the grabbing component are provided with mutually adapted external tapered threads and internal tapered threads. When the threaded sleeve and the outer wall of the grabbing component are tightened, the threaded sleeve and the grabbing component are self-locked together by the self-locking characteristics of the tapered threads, further improving the connection stability and the safety of hoisting. In addition, a thrust bearing is provided to ensure that the hoisting device can rotate freely after the motor is hoisted, so as to facilitate the rotation and adjustment of the position and angle of the motor for installation and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional view of a hoisting device provided in an embodiment of the utility model;

[0023] Figure 2 An exploded view of a hoisting device provided in an embodiment of the utility model;

[0024] Figure 3 A schematic diagram of a hoisting device provided in an embodiment of the utility model when hoisting a motor;

[0025] Figure 4 An exploded view of the hoisting device provided in an embodiment of the utility model when hoisting a motor.

[0026] Description of reference numerals:

[0027] 100. Lifting unit;

[0028] 110, lifting ring; 120, lifting ear shaft; 130, lifting ring transition shaft; 140, middle shaft; 150, step connection part; 160, thrust bearing; 170, top cover;

[0029] 200, grabbing unit;

[0030] 210, grabbing unit; 220, sliding sleeve; 230, clamping portion; 240, mounting groove; 250, elastic reset member; 300, motor. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] The implementation method of this embodiment discloses a lifting device, see Figure 1The lifting device includes a lifting part 100 and a grabbing part 200. The lifting part 100 includes a protruding lifting ring 110. The grabbing part 200 is fixedly arranged below the lifting part 100. The grabbing part 200 includes a relatively open grabbing assembly and a sliding sleeve 220. The sliding sleeve 220 can be movably sleeved on the outer wall of the grabbing assembly. The grabbing assembly includes at least two grabbing units 210. The sliding sleeve 220 can be rotated and adjusted along the axis direction of the grabbing assembly, and the end of the grabbing assembly away from the lifting ring 110 can be relatively opened or closed. And a clamping part 230 is arranged at the end of the grabbing assembly away from the lifting ring 110.

[0033] For details, see Figure 1 The lifting ring 110 in this embodiment is a circular lifting ring 110, which is stable and reliable when hoisted and connected. In this embodiment, the grabbing assembly is provided with two grabbing units 210, but those skilled in the art can understand that the grabbing units 210 can also be provided with 3, 4 or other quantities according to needs to facilitate grabbing the motor 300.

[0034] Furthermore, the sleeve 220 can be rotated and adjusted along the axial direction of the grabbing assembly and make the end of the grabbing assembly away from the ring 110 relatively open or closed, which means that the sleeve 220 can rotate and slide back and forth along the axial direction on the outer wall of the grabbing assembly. When the sleeve 220 slides to the side close to the ring 110, the end of the grabbing assembly away from the ring 110 is relatively open. When the sleeve 220 slides to the end close to the grabbing assembly, the end of the grabbing assembly away from the ring 110 is relatively closed. The clamping part 230 is used to clamp and grab the motor 300. After the clamping part 230 grabs the motor 300, the sleeve 220 slides to the end close to the grabbing assembly to control and tighten the grabbing assembly for subsequent operation, installation and assembly processes.

[0035] Therefore, this embodiment provides a slidable sleeve 220 on the outer wall of the grabbing unit 210, thereby controlling the two grabbing units 210 to open or close relative to each other, and clamping the motor 300 through the clamping part 230. Specifically, when the clamping parts 230 on the two grabbing units 210 clamp the motor 300, the sleeve 220 slides on the outer wall of the two grabbing units 210, and the clamping parts 230 clamp the motor 300. At this time, the hoisting part 100 and the hoisting ring 110 cooperate with the crane or other hoisting devices, and then hoist the motor 300 for installation. In other words, the hoisting device disclosed in this embodiment can realize that the two grabbing units 210 are in a tightened state or a loosened state by rotating the sleeve 220 sleeved on the outer wall of the two grabbing units 210, and has the advantages of safety, stability, high efficiency and high speed during hoisting.

[0036] Those skilled in the art should understand that in this embodiment, the lifting device is used to lift a motor as an example, and the lifting device can also be used to lift other components, such as a gearbox, an engine, etc.

[0037] The implementation of this embodiment also discloses a hoisting device, wherein the sleeve 220 includes a threaded sleeve, an internal thread is provided inside the threaded sleeve, and an external thread adapted to the internal thread is provided on the outer wall of the grab assembly. The internal thread of the threaded sleeve and the external thread of the grab assembly are adapted to be threaded, and when the two grab units 210 of the grab assembly need to be loosened or tightened, it can be achieved by rotating the threaded sleeve, which has the advantages of simple structure and high stability of the threaded connection.

[0038] Preferably, the outer wall of the grab assembly is provided with an outer tapered thread, and the inner wall of the threaded sleeve is provided with an inner tapered thread adapted to the outer tapered thread. In the inner tapered thread formed on the inner wall of the threaded sleeve, along the axial direction of the threaded sleeve, the opening diameter of the inner tapered thread on the side close to the lifting part 100 is larger than the opening diameter of the inner tapered thread on the side close to the clamping structure, that is, the outer tapered thread processed on the grab assembly is in a state where the upper diameter is slightly smaller and the lower diameter is slightly larger.

[0039] With this structural design, by setting mutually compatible external tapered threads and internal tapered threads, after the grasping unit 210 grasps the motor 300, when the threaded sleeve and the outer wall of the grasping assembly are tightened, the self-locking characteristics of the tapered thread are utilized to make the threaded sleeve and the grasping assembly self-lock together, thereby further improving the connection stability and the safety of lifting.

[0040] The implementation method of this embodiment also discloses a lifting device, see Figure 2 The grabbing unit 210 includes two grabbing sleeves, which are arranged opposite to each other and are both hollow semi-cylindrical. When the two grabbing sleeves are closed, they are cylindrical. The sliding sleeve 220 is sleeved on the outer periphery of the grabbing sleeve, away from the end of the lifting part 100. The clamping part 230 is arranged on the inner wall of the grabbing sleeve, close to the opening.

[0041] Specifically, the two semicircular sleeves are briefly described. In one embodiment, the two semicircular sleeves are formed by laser cutting along the middle axis of a full-circular sleeve, and a tapered thread is processed on the outer wall before cutting. In this way, two semi-cylindrical grabbing sleeves are arranged opposite to each other, opened before hoisting the motor 300, and after cooperating with the motor 300, the two grabbing sleeves are tightened by rotating the sliding sleeve 220. At this time, the clamping part 230 is stably clamped on the backing groove or other parts of the motor 300, so as to carry out subsequent hoisting, moving, installation and assembly.

[0042] The implementation of this embodiment further discloses a lifting device, wherein the clamping portion 230 includes at least any one of a hook, a protrusion, and a groove arranged on the inner wall of the end of the grabbing sleeve away from the lifting portion 100.

[0043] Specifically, the spline root of a common motor 300 is used as an example for explanation. At this time, the clamping portion 230 is set as a hook or a protrusion. When the two semicircular sleeves are clamped by the sliding sleeve 220, the hook and the protrusion are just adapted to the back groove, and the clamping structure is also relatively stable. Further, the hoisting device disclosed in the present application can also grab or hoist other components, so the clamping portion 230 can also be set as other structures according to needs, and this embodiment does not specifically limit this.

[0044] The implementation method of this embodiment also discloses a lifting device, see Figure 1 as well as Figure 2 An installation groove 240 is provided at one end of the two grabbing sleeves close to the clamping portion 230, and an elastic reset member 250 is provided in the installation groove 240. When the two grabbing sleeves are closed, the elastic reset member 250 is in a compressed state.

[0045] Preferably, the elastic reset member 250 in this embodiment is configured as a common compression spring. When the sleeve 220 tightens the two grabbing sleeves and closes (this is the grabbing state), the compression spring is in a compressed state. When the sleeve 220 releases the two grabbing sleeves, the two grabbing sleeves separate from each other under the elastic action of the compression spring, so as to facilitate the next grabbing of the motor 300.

[0046] The implementation method of this embodiment also discloses a lifting device, see Figure 1 and Figure 2 The lifting part 100 further includes a lifting ring transition shaft 130, and the lifting ring 110 is detachably arranged at one end of the lifting ring transition shaft 130. The lifting ring 110 includes a circular lifting ring and a lifting ring shaft 120, the outer wall of the lifting ring shaft 120 is provided with an external thread, and the inner wall of the lifting ring transition shaft 130 is provided with an internal thread adapted to the external thread. Specifically, the lifting ring 110 is connected to one end of the lifting ring transition shaft 130 by threaded connection.

[0047] Furthermore, a central axis 140 is provided at one end of the lifting ring transition shaft 130 away from the lifting ring 110, and the central axis 140 is detachably connected to the lifting ring transition shaft 130. A step connection portion 150 is provided at one end of the central axis 140 close to the grabbing sleeve, and the end of the grabbing sleeve close to the step connection portion 150 is adaptably connected to the step connection portion 150.

[0048] With this structural design, the provision of a lifting ring transition shaft 130 and a central shaft 140 can improve the stability and structural strength of the overall structure of the lifting device, and the provision of a step connection portion 150 facilitates connection and fixation, and the step connection portion 150 has the advantages of stable connection, support and good rigidity.

[0049] The implementation method of this embodiment also discloses a lifting device. A thrust bearing 160 is further provided at one end of the lifting ring transition shaft 130 close to the central shaft 140 . Two thrust bearings 160 are provided and are spaced apart along the axial direction of the lifting ring transition shaft 130 .

[0050] With this structural design, after the thrust bearing 160 is set, it is ensured that the hoisting device can rotate freely after the motor 300 is hoisted, and the position or angle of the motor 300 can be adjusted during hoisting to facilitate the installation and assembly of the motor 300.

[0051] The implementation method of this embodiment also discloses a lifting device, see Figure 1 , and also includes a top cover 170, which is detachably arranged on the side of the middle shaft 140 close to the lifting ring 110, and the top cover 170 is threadedly connected to the middle shaft 140 (not shown in the figure). In addition, a thrust bearing 160 is also arranged between the top cover 170 and the lifting ring transition shaft 130, and a thread glue is also coated on the threaded connection part between the top cover 170 and the middle shaft 140. The top cover 170 can protect the middle shaft 140 and the lifting ring transition shaft 130, and a thrust bearing 160 is also arranged between the top cover 170 and the lifting ring transition shaft 130 to ensure that the lifting device can be rotated and adjusted.

[0052] In summary, the utility model discloses a hoisting device, by arranging a slidable sleeve 220 on the outer wall of the grabbing unit 210, so as to control the two grabbing units 210 to open or close relative to each other, and by clamping the motor 300 by the two grabbing units 210, the rotating sleeve 220 can realize that the two grabbing units 210 are in a clamped state or a loose state, which has the advantages of safety, stability, high hoisting efficiency and high speed during hoisting. In addition, the threaded sleeve and the grabbing assembly are provided with mutually adapted external tapered threads and internal tapered threads. When the threaded sleeve and the outer wall of the grabbing assembly are tightened, the threaded sleeve and the grabbing assembly are self-locked together by the self-locking characteristics of the tapered threads, further improving the connection stability and the safety of hoisting. In addition, a thrust bearing 160 is provided to ensure that the hoisting device can rotate freely after hoisting the motor 300, so as to facilitate the rotation and adjustment of the position and angle of the motor 300 for installation and assembly.

[0053] Further, a brief description of the assembly method of the lifting device is given in Figure 1 and Figure 2The lifting ring 110 is screwed onto the lifting ring transition shaft 130 in a threaded connection manner. The lifting ring transition shaft 130 is connected to the central shaft 140, and a thrust bearing 160 is padded in the middle. A top cover 170 is also provided on the side of the central shaft 140 close to the lifting ring 110. The top cover 170 is threadedly connected to the central shaft 140, and thread glue is also applied at the threaded connection to ensure that the thread is not loose. Two grabbing sleeves are connected to the step connection part 150 of the central shaft 140. This arrangement enables the two grabbing sleeves to be relatively opened or closed. A threaded sleeve is sleeved on the outer wall of the two grabbing sleeves, and slots are processed on the opposite sides below the two grabbing sleeves for placing two elastic reset members 250.

[0054] Furthermore, the method or steps of the lifting device grabbing the motor 300 are described:

[0055] Before the lifting device grabs the motor 300, the threaded sleeve is rotated on the upper part of the grab sleeve. At this time, the grab sleeve is stretched open under the action of two compression springs, and the lower parts of the two grab sleeves are in an open state. Figure 3 , then put the lifting device on the spline of the motor 300 to be hoisted, the clamping parts 230 (hooks) on the two grabbing sleeves are at the back cut groove at the root of the spline, and then rotate the threaded sleeve downward and tighten it until it fits with the upper plane of the motor 300 part. During this process, the lower parts of the two grabbing sleeves gradually shrink from the open state until the hooks of the grabbing sleeves completely clamp the back cut groove of the spline. This state can be seen in Figure 4 Due to the characteristic of the tapered thread that it becomes tighter as it is screwed, the two grabbing sleeves can be tightly clamped, and due to the self-locking characteristic of the tapered thread, the threaded sleeve will not slip off easily. At this time, the lifting device and the motor 300 can be lifted by the lifting ring 110 for subsequent assembly, and the angle of the motor 300 can also be rotated and adjusted as needed.

[0056] The device has a certain versatility. The hoisted part is not necessarily the spline, and the hoisted object is not necessarily just the motor. Any component with a back-cut groove can be hoisted with the device, and it can also be used in other occasions as needed.

[0057] It should be noted that, in addition to the implementation methods of the utility model described in the above-mentioned specific specific embodiments, those skilled in the art can easily understand other advantages and functions of the utility model from the contents disclosed in this specification. Although the description of the utility model will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation method. On the contrary, the purpose of introducing the utility model in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the utility model. In order to provide an in-depth understanding of the utility model, the above description contains many specific details, and the utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0058] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0059] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0060] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0061] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0062] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A lifting device, characterized in that: include: A lifting part, wherein the lifting part includes a lifting ring protrudingly arranged; A gripping part, the gripping part is fixedly arranged below the lifting part, the gripping part comprises a gripping assembly and a sliding sleeve which can be relatively opened, and the sliding sleeve can be movably sleeved on the outer wall of the gripping assembly; in The grab assembly comprises at least two grab units, the sliding sleeve can be rotated and adjusted along the axis direction of the grab assembly, and makes the end of the grab assembly away from the lifting ring relatively open or closed; and A clamping portion is provided at one end of the grabbing assembly away from the hanging ring.

2. The lifting device according to claim 1, characterized in that: The sliding sleeve comprises a threaded sliding sleeve, an internal thread is arranged inside the threaded sliding sleeve, and an external thread matching the internal thread is arranged on the outer wall of the grabbing component.

3. The lifting device according to claim 2, characterized in that: The outer wall of the grab assembly is provided with an outer tapered thread, and the inner wall of the threaded sleeve is provided with an inner tapered thread adapted to the outer tapered thread; In the internal tapered thread formed on the inner wall of the threaded sleeve, along the axial direction of the threaded sleeve, the opening diameter of the internal tapered thread close to the lifting portion is larger than the opening diameter of the internal tapered thread close to the clamping portion.

4. The hoisting device according to any one of claims 1 to 3, characterized in that: The grabbing unit comprises a grabbing sleeve, two of which are provided; The two grabbing sleeves are arranged opposite to each other and are both hollow semi-cylindrical. When the two grabbing sleeves are closed, they are cylindrical. The sliding sleeve is sleeved on the outer periphery of the grabbing sleeve and one end away from the lifting part. The clamping portion is arranged on the inner wall portion of the grabbing sleeve, close to the opening.

5. The lifting device according to claim 4, characterized in that: The clamping portion at least includes any one of a hook, a protrusion, and a groove arranged on the inner wall of the end of the grabbing sleeve away from the lifting portion.

6. The lifting device according to claim 5, characterized in that: The two grabbing sleeves are provided with a mounting groove at one end close to the clamping portion, and an elastic reset member is provided in the mounting groove; wherein When the two grabbing sleeves are closed, the elastic reset member is in a compressed state.

7. The lifting device according to claim 1, characterized in that: The lifting part also includes a lifting ring transition shaft, and the lifting ring is detachably arranged at one end of the lifting ring transition shaft; The lifting ring comprises a circular lifting ear and a lifting ear shaft, the outer wall of the lifting ear shaft is provided with an external thread, and the inner wall of the lifting ring transition shaft is provided with an internal thread matched with the external thread.

8. The lifting device according to claim 7, characterized in that: A central axis is also provided at one end of the lifting ring transition shaft away from the lifting ring, and the central axis is detachably connected to the lifting ring transition shaft. A step connecting portion is provided at one end of the central axis close to the grabbing sleeve, and the end of the grabbing sleeve close to the step connecting portion is adaptably connected to the step connecting portion.

9. The lifting device according to claim 8, characterized in that: A thrust bearing is also arranged at one end of the lifting ring transition shaft close to the central shaft, and two thrust bearings are arranged at intervals along the axial direction of the lifting ring transition shaft.

10. The lifting device according to claim 9, characterized in that: It also includes a top cover, which is detachably disposed on a side of the middle shaft close to the hanging ring, and the top cover is threadedly connected to the middle shaft; and The thrust bearing is also arranged between the top cover and the lifting ring transition shaft, and the threaded connection portion between the top cover and the middle shaft is also coated with thread glue.

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