Annular workpiece hoisting device

Abstract

The utility model provides an annular workpiece hoisting device, and relates to the technical field of hoisting and carrying. The multiple supporting and positioning assemblies are arranged around the central axis of the hoisting base at equal intervals, each supporting and positioning assembly comprises a supporting rod and a positioning piece, the supporting rods are horizontally arranged on the hoisting base and can horizontally stretch out and draw back along the hoisting base, the central axes of the supporting rods intersect with the central axis of the hoisting base, and the ends, away from the hoisting base, of the supporting rods are used for supporting the bottom face of the annular workpiece; the positioning piece is fixedly arranged on the top surface of one end, away from the hoisting seat, of the supporting rod and used for positioning the inner wall of the annular workpiece; and the driving assembly is fixedly arranged on the hoisting base and used for driving the multiple supporting and positioning assemblies to horizontally stretch out and draw back synchronously relative to the hoisting base. The multiple supporting and positioning assemblies can uniformly and synchronously apply force under the action of the driving assembly, stable supporting and positioning of the annular workpiece are achieved, the adjusting process is simplified, and the accuracy and safety of the hoisting process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting and handling, in particular to a hoisting device for annular workpieces. Background Art

[0002] In the manufacturing and industrial fields, large annular workpieces usually need to be hoisted in a production line or an assembly workshop to ensure that they are in the correct position during subsequent processing or assembly. Due to the large volume, heavy weight, and complex shape of these workpieces, hoisting is a key step to achieve efficient production and assembly.

[0003] Traditional hoisting systems usually use slings or chains to support large annular workpieces. However, since the supporting surface of the sling or chain is relatively small, it is difficult to provide uniform support in this way. There is an unstable center of gravity during the hoisting of the annular workpiece, and the workpiece is prone to tilt or shake during hoisting. This not only increases the risk of workpiece damage but also may pose a threat to the safety of operators.

[0004] At present, there are also some hoisting methods that use clamping jaws to clamp and lift the outer wall or inner wall of the annular workpiece. Whether it is clamping the outer wall or the inner wall of the annular workpiece, the main defect lies in the insufficient clamping stability. Outer wall clamping is prone to workpiece slippage or shaking due to limited contact area and uneven force application; inner wall clamping is complex in fixture operation and unstable in clamping due to inner wall size limitations and positioning difficulties. These defects may affect the safety and efficiency of the hoisting process and increase the risk of workpiece damage. In addition, for annular workpieces of different sizes and shapes, the adjustment and setting of the fixture are relatively complex in the above two clamping methods, and frequent adjustments are required to adapt to the outer walls of different workpieces. This complex adjustment process not only increases the operation time but also may affect the clamping accuracy and stability. Summary of the Utility Model

[0005] In view of this, the utility model provides a hoisting device for annular workpieces to solve the problems of uneven support, insufficient clamping stability, and complex adjustment existing in the existing hoisting devices for annular workpieces.

[0006] The technical solution of the utility model is realized as follows:

[0007] The utility model provides a hoisting device for annular workpieces, comprising:

[0008] A hoisting seat;

[0009] There are multiple support and positioning components, which are arranged on the lifting seat at equal intervals around the central axis of the lifting seat. The support and positioning components include support rods and positioning members. The support rods are horizontally arranged on the lifting seat and can horizontally expand and contract along the lifting seat. The central axis of the support rod intersects with the central axis of the lifting seat. The end of the support rod away from the lifting seat is used to support the bottom surface of the annular workpiece, and the positioning member is fixedly arranged on the top surface of the end of the support rod away from the lifting seat for positioning the inner wall of the annular workpiece.

[0010] The driving component is fixedly arranged on the lifting seat and is used to drive multiple support and positioning components to horizontally expand and contract synchronously relative to the lifting seat.

[0011] On the basis of the above technical solution, preferably, the lifting seat includes a bottom plate and a fixed cylinder fixedly arranged at the center of the bottom plate. A plurality of mounting plates are arranged on the bottom plate at equal intervals around the center of the fixed cylinder. The support and positioning components are slidably arranged on the mounting plates, and the driving component is arranged on the fixed cylinder and is used to drive multiple support and positioning components to horizontally expand and contract synchronously on the mounting plates.

[0012] Further, preferably, a slide rail is fixedly arranged on the mounting plate, and the support rod is slidably arranged on the slide rail. The driving component includes a telescopic element, a hinge seat and a connecting rod. A strip-shaped hole is formed in the side wall of the fixed cylinder along its axial direction. The fixed end of the telescopic element is fixedly arranged at the top end of the fixed cylinder, and the telescopic end of the telescopic element is coaxially inserted into the fixed cylinder and fixedly connected with the hinge seat. One end of the connecting rod is hingedly connected with the support rod, and the other end movably passes through the strip-shaped hole and extends into the fixed cylinder to be hingedly connected with the hinge seat.

[0013] On the basis of the above technical solution, preferably, the support and positioning component further includes a slider and an adjusting device. The slider is slidably arranged on the slide rail, and the support rod is slidably arranged between the slider and the mounting plate. The end of the connecting rod away from the hinge seat is hingedly connected with the slider, and the adjusting device is arranged between the slider and the support rod and is used to adjust the length of the support rod extending out of the mounting plate relative to the slider.

[0014] Further, preferably, a plurality of positioning holes are arranged on the support rod at equal intervals along its length direction, and the adjusting device is fixedly arranged on the top surface of the slider and is used to cooperate with the positioning holes to lock the positions of the support rod and the slider.

[0015] Furthermore, preferably, the adjusting device includes a cylinder body, a positioning rod, an elastic member, an end cover and a limiting plate. An installation hole is arranged on the top surface of the slider, and the cylinder body is vertically fixedly arranged in the installation hole. The positioning rod is coaxially arranged in the cylinder body. One end of the positioning rod movably passes through the bottom end of the cylinder body for connection with the positioning hole. The limiting plate is located in the cylinder body and is fixedly connected with the positioning rod. The end cover is fixedly arranged at the top opening end of the cylinder body. The other end of the positioning rod movably passes through the outside of the end cover, and the elastic member is sleeved on the positioning rod. One end of the elastic member abuts against the limiting plate, and the other end abuts against the inner top surface of the end cover.

[0016] Preferably, a positioning sleeve is coaxially and fixedly arranged on the inner top surface of the end cover. The distance from the positioning sleeve to the inner bottom surface of the cylinder body is less than or equal to the distance from the top surface of the limiting plate to the bottom end of the positioning rod. The elastic member is located between the positioning sleeve and the positioning rod.

[0017] Preferably, a lifting part is fixedly arranged at one end of the positioning rod extending out of the outer side of the end cover.

[0018] Preferably, the positioning member is of a cylindrical structure.

[0019] Preferably, a connecting plate is fixedly connected to the top end of the fixed cylinder for connection with a hoisting device.

[0020] The utility model has the following beneficial effects compared with the prior art:

[0021] (1) The bottom surface of the annular workpiece can be supported by a plurality of uniformly distributed support rods, which helps to evenly bear the weight of the workpiece during the hoisting process of the workpiece and avoid unstable center of gravity. By fixedly arranging a positioning member on the top surface of the end of the support rod far away from the hoisting seat, when the support rod extends to an appropriate position and supports the bottom surface of the annular workpiece, the positioning member will contact the inner wall of the annular workpiece, forming a clamping effect. The multi-point clamping method can evenly distribute the clamping force, ensure the central positioning of the annular workpiece on the hoisting seat, effectively prevent the sliding phenomenon of the workpiece on the support rod, and ensure the smoothness and safety of the hoisting process; under the action of the driving component, the plurality of support and positioning components can apply force evenly and synchronously, realize the stable support and positioning of the annular workpiece, simplify the adjustment process, and improve the accuracy and safety of the hoisting process.

[0022] (2) Through the movement of the telescopic element and the connecting rod, the support rod can accurately extend to the bottom surface of the workpiece, realizing the precise positioning of the annular workpiece. The extension of the support rod enables the positioning member to stably clamp the inner wall of the annular workpiece, ensuring the stable center of the annular workpiece after clamping and preventing the movement or sliding of the workpiece during the hoisting process. The synchronous movement of the plurality of connecting rods and support rods enhances the stability and reliability of the clamping. The complex clamping action can be realized through the action of the driving component, improving the operation efficiency.

[0023] (3) By adding the slider and the adjusting device, the slider provides a stable sliding path for the movement of the support rod, and the adjusting device enables the length of the support rod to be accurately adjusted according to actual needs. With this design, the device can not only adapt to annular workpieces of different sizes, but also improve the stability, flexibility and efficiency of the operation.

[0024] (4) The adjusting device, through the ingenious cooperation of the cylinder body, positioning rod, elastic member, limiting plate and end cover, makes the positioning and locking of the support rod more convenient and reliable. This structural arrangement not only improves the operation efficiency and adaptability of the device, but also enhances the stability and reliability of the overall structure, making it applicable to the hoisting operations of annular workpieces of various different sizes and improving the adaptability of the device. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 Structural schematic diagram of the annular workpiece hoisting device in the extended state disclosed by the present invention;

[0027] Figure 2 Structural schematic diagram of the annular workpiece hoisting device in the retracted state disclosed by the present invention;

[0028] Figure 3 Top view of the assembly structure of the annular workpiece hoisting device disclosed by the present invention and the annular workpiece;

[0029] Figure 4 For Figure 3 Cross-sectional view taken along the plane A-A in

[0030] Figure 5 For Figure 4 Local enlarged view at B in

[0031] Reference Numerals:

[0032] 1, hoisting seat; 2, support positioning assembly; 21, support rod; 22, positioning member; 3, drive assembly; 11, bottom plate; 12, fixed cylinder; 111, mounting plate; 112, slide rail; 31, telescopic element; 32, hinge seat; 33, connecting rod; 23, slider; 24, adjusting device; 211, positioning hole; 241, cylinder body; 242, positioning rod; 243, elastic member; 244, end cover; 245, limiting plate; 246, positioning sleeve; 247, lifting part; 122, connecting plate; 121, strip hole; S, annular workpiece. Detailed Description of the Embodiment

[0033] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] As Figure 1 shown, in combination with Figures 2 - 5 , an embodiment of the present utility model discloses a hoisting device for annular workpieces, which includes a hoisting seat 1, a support and positioning assembly 2, and a driving assembly 3.

[0035] Among them, the hoisting seat 1 serves as the basic structure of the entire hoisting device and is used to install and support other components.

[0036] The support and positioning assembly 2 is used to support and clamp and position the annular workpiece. Specifically, a plurality of support and positioning assemblies in this embodiment are arranged on the hoisting seat 1 at equal intervals around the central axis of the hoisting seat 1. Such an arrangement can provide uniform supporting force and clamping and positioning force for the annular workpiece.

[0037] The support and positioning assembly 2 includes a support rod 21 and a positioning member 22. The support rod 21 is horizontally arranged on the hoisting seat 1 and can be horizontally telescoped along the hoisting seat 1. The central axis of the support rod 21 intersects the central axis of the hoisting seat 1. One end of the support rod 21 away from the hoisting seat 1 is used to support the bottom surface of the annular workpiece, and the positioning member 22 is fixedly arranged on the top surface of the end of the support rod 21 away from the hoisting seat 1 and is used to position the inner wall of the annular workpiece.

[0038] The bottom surface of the annular workpiece can be supported by a plurality of uniformly distributed support rods 21, which helps to evenly bear the weight of the workpiece during the hoisting process of the workpiece and avoid unstable center of gravity. By fixedly arranging the positioning member 22 on the top surface of the end of the support rod 21 away from the hoisting seat 1, when the support rod 21 extends to an appropriate position and supports the bottom surface of the annular workpiece, the positioning member 22 will contact the inner wall of the annular workpiece, forming a clamping effect. Since the support and positioning assembly 2 is arranged at equal intervals around the central axis of the hoisting seat 1, a plurality of positioning members 22 will contact the inner wall of the annular workpiece at the same time. This multi-point clamping method can evenly distribute the clamping force and ensure the central positioning of the annular workpiece on the hoisting seat 1. The clamping action of a plurality of positioning members 22 on the inner wall of the annular workpiece can effectively prevent the workpiece from slipping on the support rod 21 and ensure the smoothness and safety of the hoisting process.

[0039] The driving component 3 is fixedly arranged on the lifting seat 1 and is used to drive a plurality of support and positioning components 2 to horizontally expand and contract synchronously relative to the lifting seat 1. On the one hand, it ensures that the support rod 21 can extend, and the end of the support rod 21 away from the lifting seat 1 can extend to the bottom surface of the annular workpiece to realize the support of the annular workpiece. On the other hand, during the extension process of the support rod 21, the positioning member 22 can clamp and position the inner wall of the annular workpiece. Under the action of the driving component 3, the plurality of support and positioning components 2 can apply force evenly and synchronously to realize the stable support and positioning of the annular workpiece.

[0040] The horizontal expansion and contraction function of the support and positioning component 2 enables the device to adapt to annular workpieces of different sizes, reducing the need for frequent adjustment. The equally spaced support and positioning components 2 ensure the uniform support and positioning of the workpiece, simplify the adjustment process, and improve the accuracy and safety of the lifting process.

[0041] Since the support rod 21 and the positioning member 22 act together on the bottom surface and the inner wall of the workpiece, the stability of the workpiece during the lifting process is greatly improved, reducing the risk of the workpiece slipping, tilting or shaking, thus ensuring the safety of the operator.

[0042] As some preferred embodiments, the lifting seat 1 includes a bottom plate 11 and a fixed cylinder 12 fixedly arranged at the center of the bottom plate 11. A plurality of mounting plates 111 are equally spaced around the center of the fixed cylinder 12 on the bottom plate 11. The support and positioning components 2 are slidably arranged on the mounting plates 111, ensuring the uniform distribution of the support and positioning components 2 on the inner wall of the annular workpiece. The driving component 3 is arranged on the fixed cylinder 12 and is used to drive a plurality of support and positioning components 2 to horizontally expand and contract synchronously on the mounting plates 111, ensuring the stability and central positioning of the workpiece during the lifting process.

[0043] As some preferred embodiments, a slide rail 112 is fixedly arranged on the mounting plate 111. The support rod 21 is slidably arranged on the slide rail 112. The slide rail 112 provides a sliding path for the support rod 21 to ensure its stable movement on the horizontal plane.

[0044] The driving component 3 includes a telescopic element 31, a hinge seat 32 and a connecting rod 33. A strip-shaped hole 121 is opened in the side wall of the fixed cylinder 12 along its axial direction. The fixed end of the telescopic element 31 is fixedly arranged at the top of the fixed cylinder 12. The telescopic end of the telescopic element 31 is coaxially inserted into the fixed cylinder 12 and fixedly connected with the hinge seat 32. One end of the connecting rod 33 is hingedly connected with the support rod 21, and the other end movably passes through the strip-shaped hole 121 and extends into the fixed cylinder 12 to be hingedly connected with the hinge seat 32.

[0045] With the above technical solution, when performing the support, clamping and positioning of the annular workpiece, the telescopic end of the telescopic element 31 extends. The telescopic end drives a plurality of connecting rods 33 to rotate through the hinge seat 32. One end of the connecting rod 33 connected to the hinge seat 32 moves downward along the axial direction of the fixed cylinder 12, and the end of the connecting rod 33 away from the hinge seat 32 translates toward the end away from the hinge seat 32, thereby driving the support rod 21 to translate outward from the mounting plate 111, and further realizing the extension of the support rod 21. When the end of the support rod 21 extends to the bottom surface of the annular workpiece, the driving assembly 3 continues to act. At this time, under the translation action of the support rod 21, the positioning member 22 stably and reliably clamps the inner wall of the annular workpiece.

[0046] Through the movement of the telescopic element 31 and the connecting rod 33, the support rod 21 can accurately extend to the bottom surface of the workpiece, realizing the precise positioning of the annular workpiece. The extension of the support rod 21 enables the positioning member 22 to stably clamp the inner wall of the annular workpiece, ensuring the stability of the center of the annular workpiece after clamping and preventing the movement or slippage of the workpiece during the hoisting process. The synchronous movement of the plurality of connecting rods 33 and the support rod 21 enhances the stability and reliability of the clamping. The complex clamping action can be realized through the action of the driving assembly 3, improving the operation efficiency. In this embodiment, the telescopic element 31 is an oil cylinder or a cylinder.

[0047] In the above embodiment, the telescopic stroke of the support rod 21 is fixed, which makes the inner diameter range of the annular workpiece applicable to the hoisting device fixed. When the size of the annular workpiece exceeds the extension stroke of the support rod 21, the hoisting device cannot be applied, and a new hoisting device needs to be replaced, resulting in poor versatility.

[0048] Therefore, the support and positioning assembly 2 disclosed in this embodiment further includes a slider 23 and an adjusting device 24. The slider 23 is slidably disposed on the slide rail 112. The slider 23 can freely move on the slide rail 112, thereby adjusting the starting position and movement path of the support rod 21, providing greater flexibility for the extension of the support rod 21. The support rod 21 is slidably disposed between the slider 23 and the mounting plate 111. Through the sliding of the support rod 21, the support and positioning assembly 2 can more flexibly adapt to annular workpieces of different sizes, thereby realizing the adjustment of the length and position of the support rod 21. One end of the connecting rod 33 away from the hinge seat 32 is hingedly connected to the slider 23, and the slider 23 will be driven to translate during the movement of the connecting rod 33.

[0049] The adjusting device 24 is disposed between the slider 23 and the support rod 21, and is used to adjust the length of the support rod 21 extending from the mounting plate 111 relative to the slider 23. The adjusting device 24 allows the length of the support rod 21 to be flexibly adjusted, enabling the device to be applicable to annular workpieces of different sizes, including larger-sized workpieces. After the adjustment is completed, the adjusting device 24 can fix the positions of the support rod 21 and the slider 23 to form a whole, so that the support rod 21 supports the workpiece in a fixed state.

[0050] In this embodiment, with the addition of the slider 23 and the adjusting device 24, the slider 23 provides a stable sliding path for the movement of the support rod 21, and the adjusting device 24 enables the length of the support rod 21 to be precisely adjusted according to actual needs. Through this design, the device can not only adapt to annular workpieces of different sizes, but also improve the stability, flexibility and efficiency of operation.

[0051] As some preferred embodiments, a plurality of positioning holes 211 are arranged at equal intervals along the length direction of the support rod 21. The adjusting device 24 is fixedly arranged on the top surface of the slider 23 and is used to cooperate with the positioning holes 211 to lock the positions of the support rod 21 and the slider 23. With the above technical solution, when the support rod 21 is adjusted to a suitable position, the adjusting device 24 can be inserted into the positioning hole 211 to ensure the relative position locking between the support rod 21 and the slider 23.

[0052] This embodiment shows a preferred structural form of the adjusting device 24. Specifically, the adjusting device 24 includes a cylinder body 241, a positioning rod 242, an elastic member 243, an end cover 244 and a limiting plate 245.

[0053] An installation hole is provided on the top surface of the slider 23. The cylinder body 241 is vertically and fixedly arranged in the installation hole. The upper end of the cylinder body 241 is open, which constitutes the main structure of the adjusting device 24. The positioning rod 242 is coaxially arranged in the cylinder body 241. One end of the positioning rod 242 movably passes through the bottom end of the cylinder body 241 and is used to connect with the positioning hole 211, playing a role in positioning and fixing the support rod 21. The limiting plate 245 is located in the cylinder body 241 and is fixedly connected to the positioning rod 242, used to limit the up and down movement range of the positioning rod 242. The end cover 244 is fixedly arranged at the open end of the top surface of the cylinder body 241. The other end of the positioning rod 242 movably passes through the outside of the end cover 244, playing a role in closing the cylinder body 241 and guiding the movement of the positioning rod 242. The elastic member 243 is sleeved on the positioning rod 242. One end of it abuts against the limiting plate 245, and the other end abuts against the inner top surface of the end cover 244, providing an elastic force to keep the positioning rod 242 in contact with or disengaged from the positioning hole 211 of the support rod 21.

[0054] With the above technical solution, without external force, under the elastic force of the elastic member 243, the positioning rod 242 has a potential energy of moving downward along the cylinder body 241, and the lower end of the positioning rod 242 is inserted into the positioning hole 211 of the support rod 21. When it is necessary to adjust the length of the support rod 21 extending out of the slider 23, by pulling up the positioning rod 242, the positioning rod 242 compresses the elastic member 243 through the limiting plate 245 under the upward acting force, so that the positioning rod 242 moves upward, thus disengaging from the positioning hole 211. At this time, the support rod 21 can be manually slid. When the position of the support rod 21 extending out of the slider 23 is determined, the pulling force of the positioning rod 242 is released. Under the action of the elastic member 243, the positioning member 22 moves downward and is inserted into the positioning hole 211, thereby keeping the slider 23 and the support rod 21 relatively fixed. At this time, when the slider 23 translates under the action of the connecting rod 33, the slider 23 and the support rod 21 as a whole will translate along the slide rail 112.

[0055] The adjusting device 24 disclosed in this embodiment makes the positioning and locking of the support rod 21 more convenient and reliable through the ingenious cooperation of the cylinder body 241, the positioning rod 242, the elastic member 243, the limiting plate 245 and the end cover 244. This structural setting not only improves the operation efficiency and adaptability of the device, but also enhances the stability and reliability of the overall structure, making it applicable to the hoisting operations of various ring-shaped workpieces with different sizes and improving the adaptability of the device.

[0056] As some preferred embodiments, a positioning sleeve 246 is coaxially and fixedly arranged on the inner top surface of the end cover 244. The distance from the positioning sleeve 246 to the inner bottom surface of the cylinder body 241 is less than or equal to the distance from the top surface of the limiting plate 245 to the bottom end of the positioning rod 242. The elastic member 243 is located between the positioning sleeve 246 and the positioning rod 242. With this setting, when pulling up the positioning rod 242, when the positioning rod 242 moves upward and disengages from the positioning hole 211, and the limiting plate 245 abuts against the bottom end of the positioning sleeve 246, at this time, the positioning rod 242 cannot be pulled up continuously, thereby limiting the upward moving stroke of the positioning rod 242. On the one hand, it can avoid the fatigue damage of the elastic member 243 caused by excessive pulling. On the other hand, it can avoid the situation that the lower end of the positioning rod 242 completely enters the interior of the cylinder body 241 due to excessive upward movement of the positioning rod 242, resulting in no constraint on the lower end of the positioning rod 242, and there will be non-coaxiality between the positioning rod 242 and the cylinder body 241, resulting in the lower end of the positioning rod 242 being unable to smoothly pass through the bottom end of the cylinder body 241 during the reset process, affecting the cooperation between the positioning rod 242 and the positioning hole 211.

[0057] Preferably, a lifting portion 247 is fixedly arranged at one end of the positioning rod 242 extending out of the outer side of the end cover 244. Through the lifting portion 247, it is convenient and easy to pull up the positioning rod 242, and the operation is convenient.

[0058] Preferably, the positioning member 22 has a cylindrical structure, which can better adapt to the inner wall of the annular workpiece, reduce the friction between the positioning member 22 and the inner wall of the annular workpiece, and avoid damaging the inner wall of the annular workpiece.

[0059] Preferably, a connecting plate 122 is fixedly connected to the top end of the fixing cylinder 12 for connecting with a hoisting device. The entire hoisting device can be connected to a crane or a manipulator through the connecting plate 122.

[0060] During actual use, the annular workpiece needs to be placed upright or obliquely, so as to facilitate the entire hoisting device to pass through the inside of the annular workpiece, so that the end of the support rod 21 can extend into the bottom surface of the annular workpiece, thereby supporting and lifting the annular workpiece. After the support rod 21 and the positioning member 22 complete the support and positioning of the annular workpiece, the hoisting device can be lifted upward by a crane or a manipulator. At this time, under the action of the hoisting device, the entire annular workpiece is in a horizontally lifted state, thus facilitating transportation.

[0061] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hoisting device for a ring-shaped workpiece, characterized in that, Including: A lifting seat (1); A plurality of support and positioning components (2) are arranged equidistantly around the central axis of the lifting seat (1) on the lifting seat (1). The support and positioning component (2) includes a support rod (21) and a positioning member (22). The support rod (21) is horizontally arranged on the lifting seat (1) and can horizontally expand and contract along the lifting seat (1). The central axis of the support rod (21) intersects the central axis of the lifting seat (1). The end of the support rod (21) away from the lifting seat (1) is used to support the bottom surface of the annular workpiece, and the positioning member (22) is fixedly arranged on the top surface of the end of the support rod (21) away from the lifting seat (1) for positioning the inner wall of the annular workpiece; A driving component (3) is fixedly arranged on the lifting seat (1) for driving a plurality of support and positioning components (2) to horizontally expand and contract synchronously relative to the lifting seat (1).

2. The annular workpiece hoisting device according to claim 1, characterized in that: The lifting seat (1) includes a bottom plate (11) and a fixed cylinder (12) fixedly arranged at the center of the bottom plate (11). A plurality of mounting plates (111) are arranged equidistantly around the center of the fixed cylinder (12) on the bottom plate (11). The support and positioning component (2) is slidably arranged on the mounting plate (111), and the driving component (3) is arranged on the fixed cylinder (12) for driving a plurality of support and positioning components (2) to horizontally expand and contract synchronously on the mounting plate (111).

3. The annular workpiece hoisting device according to claim 2, wherein: A slide rail (112) is fixedly arranged on the mounting plate (111). The support rod (21) is slidably arranged on the slide rail (112). The driving component (3) includes a telescopic element (31), a hinge seat (32) and a connecting rod (33). A strip-shaped hole (121) is opened in the side wall of the fixed cylinder (12) along its axial direction. The fixed end of the telescopic element (31) is fixedly arranged at the top end of the fixed cylinder (12). The telescopic end of the telescopic element (31) is coaxially inserted into the fixed cylinder (12) and fixedly connected to the hinge seat (32). One end of the connecting rod (33) is hinged to the support rod (21), and the other end movably passes through the strip-shaped hole (121) and extends into the fixed cylinder (12) to be hinged to the hinge seat (32).

4. The annular workpiece hoisting device according to claim 3, characterized in that: The support and positioning component (2) further includes a slider (23) and an adjusting device (24). The slider (23) is slidably arranged on the slide rail (112). The support rod (21) is slidably arranged between the slider (23) and the mounting plate (111). One end of the connecting rod (33) away from the hinge seat (32) is hinged to the slider (23). The adjusting device (24) is arranged between the slider (23) and the support rod (21) for adjusting the length of the support rod (21) extending out of the mounting plate (111) relative to the slider (23).

5. The annular workpiece hoisting device according to claim 4, characterized in that: A plurality of positioning holes (211) are arranged equidistantly along the length direction of the support rod (21). The adjusting device (24) is fixedly arranged on the top surface of the slider (23) for cooperating with the positioning holes (211) to lock the positions of the support rod (21) and the slider (23).

6. The annular workpiece hoisting device according to claim 5, characterized in that: The adjusting device (24) includes a cylinder body (241), a positioning rod (242), an elastic member (243), an end cover (244) and a limiting plate (245). An installation hole is provided on the top surface of the slider (23). The cylinder body (241) is vertically and fixedly arranged in the installation hole. The positioning rod (242) is coaxially arranged in the cylinder body (241). One end of the positioning rod (242) movably passes through the bottom end of the cylinder body (241) for connection with the positioning hole (211). The limiting plate (245) is located in the cylinder body (241) and fixedly connected to the positioning rod (242). The end cover (244) is fixedly arranged at the top opening end of the cylinder body (241). The other end of the positioning rod (242) movably passes through the outside of the end cover (244). The elastic member (243) is sleeved on the positioning rod (242), with one end abutted against the limiting plate (245) and the other end abutted against the inner top surface of the end cover (244).

7. The annular workpiece hoisting device according to claim 6, characterized in that: A positioning sleeve (246) is coaxially and fixedly arranged on the inner top surface of the end cover (244). The distance from the positioning sleeve (246) to the inner bottom surface of the cylinder body (241) is less than or equal to the distance from the top surface of the limiting plate (245) to the bottom end of the positioning rod (242). The elastic member (243) is located between the positioning sleeve (246) and the positioning rod (242).

8. The annular workpiece hoisting device according to claim 6, characterized in that: A lifting part (247) is fixedly arranged at one end of the positioning rod (242) extending out of the outside of the end cover (244).

9. The annular workpiece hoisting device according to claim 1, characterized in that: The positioning member (22) is of a cylindrical structure.

10. The annular workpiece hoisting device according to claim 2, characterized in that: A connecting plate (122) is fixedly connected to the top end of the fixed cylinder (12) for connection with a hoisting device.

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