Cylindrical workpiece lifting device

Abstract

The utility model relates to a cylindrical workpiece lifting device which comprises a first fastening structure (2), a second fastening structure (3) and a supporting structure (4), the first fastening structure (2) is used for being matched with the inner wall of a workpiece (1) to be lifted, and the second fastening structure (3) is used for being matched with the inner wall of the workpiece (1) to be lifted. The first fastening structure (2) is configured to expand in the radial direction of the to-be-lifted workpiece (1) so as to abut against the inner wall of the to-be-lifted workpiece (1); the second fastening structure (3) is configured to be close to the outer wall of the to-be-lifted workpiece (1) in the radial direction of the to-be-lifted workpiece (1) so as to press the outer wall of the to-be-lifted workpiece (1); the supporting structure (4) is connected between the first fastening structure (2) and the second fastening structure (3), and a hoisting part (41) used for being connected with hoisting equipment is arranged on the supporting structure (4).

Description

Technical Field

[0001] The utility model relates to the technical field of part processing, in particular to a lifting device for cylindrical workpieces. Background Art

[0002] As a key rotor component of an engine, the fan disk has extremely high machining accuracy requirements.

[0003] However, because the fan disk has an overall cylindrical structure and has characteristics such as a large deep cavity and uneven wall thickness, the fabric sling lifting method used in the related art easily causes geometric deformation of the inner contour when the fan disk is lifted, affecting the machining accuracy of the part.

[0004] In addition, due to the existence of different allowance sizes in the multi-process conversion machining of the fan disk, the difficulty of lifting and clamping is further increased.

[0005] It should be noted that the information disclosed in the background art part of the present utility model is only intended to increase the understanding of the overall background of the present utility model, and should not be regarded as an admission or an implication in any form that this information constitutes the prior art known to those skilled in the art. Summary of the Utility Model

[0006] The utility model provides a lifting device for cylindrical workpieces, which can provide stable clamping for the workpiece to be lifted.

[0007] According to one aspect of the present utility model, a lifting device for cylindrical workpieces is provided, including:

[0008] A first fastening structure for cooperating with the inner wall of the workpiece to be lifted, the first fastening structure being configured to expand radially along the workpiece to be lifted to press against the inner wall of the workpiece to be lifted;

[0009] A second fastening structure configured to approach the outer wall of the workpiece to be lifted radially along the workpiece to be lifted to press against the outer wall of the workpiece to be lifted; and

[0010] A support structure connected between the first fastening structure and the second fastening structure, and a lifting portion for connecting with a lifting device is provided on the support structure.

[0011] In some embodiments, the first fastening structure includes a driving mechanism and a plurality of expansion assemblies arranged circumferentially along the driving mechanism, the driving mechanism being configured to drive the ends of the plurality of expansion assemblies away from the driving mechanism to move towards the inner wall of the workpiece to be lifted, so that the ends of the plurality of expansion assemblies away from the driving mechanism press against the inner wall of the workpiece to be lifted.

[0012] In some embodiments, the expansion assembly includes a first connecting rod and a second connecting rod. The first ends of the first connecting rod and the second connecting rod are both connected to the driving mechanism. The second ends of the first connecting rod and the second connecting rod are hinged to each other. The driving mechanism is configured to drive the first ends of the first connecting rod and the second connecting rod to approach each other along the axial direction of the workpiece to be lifted, so that the second ends of the first connecting rod and the second connecting rod move in a direction away from the axis of the workpiece to be lifted, thereby approaching the inner wall of the workpiece to be lifted.

[0013] In some embodiments, a tightening rod for cooperating with the inner wall of the workpiece to be lifted is provided at one end of the expansion assembly away from the driving mechanism. The two ends of the tightening rod are respectively hinged to the second ends of the first connecting rod and the second connecting rod. The tightening rod is configured to approach the inner wall of the workpiece to be lifted and contact the inner wall of the workpiece to be lifted under the drive of the second ends of the first connecting rod and the second connecting rod.

[0014] In some embodiments, a protrusion for cooperating with a limiting groove on the inner wall of the workpiece to be lifted is provided on one side of the tightening rod away from the driving mechanism.

[0015] In some embodiments, the driving mechanism includes a pushing portion, a first connecting portion, and a second connecting portion. The first connecting portion is hinged to the first ends of a plurality of first connecting rods, and the second connecting portion is hinged to the first ends of a plurality of second connecting rods. The pushing portion is configured to push the second connecting portion towards the first connecting portion to drive the first ends of the first connecting rod and the second connecting rod to approach each other.

[0016] In some embodiments, the cylindrical workpiece lifting device further includes a first reset mechanism disposed between the first connecting portion and the second connecting portion. The first reset mechanism is configured to push the second connecting portion away from the first connecting portion and move to the initial position.

[0017] In some embodiments, the pushing portion includes a first screw rod that cooperates with the support structure. The support structure is provided with a first connection hole with internal threads, and the first screw rod is engaged with the internal threads of the first connection hole to drive the second connecting portion to move towards the first connecting portion by rotating the first screw rod.

[0018] In some embodiments, the second fastening structure includes a clamping ring. A support surface is provided on one side of the clamping ring facing the first fastening structure, and the contour of the support surface matches the outer wall contour of the workpiece to be lifted.

[0019] In some embodiments, the second fastening structure further includes a second screw rod. The support structure is provided with a second connection hole with internal threads, and the second screw rod is engaged with the internal threads of the second connection hole to drive the clamping ring to approach the first fastening structure and press the outer wall of the workpiece to be lifted by rotating the second screw rod.

[0020] Based on the above technical solution, the utility model realizes the double internal and external fixation of the workpiece to be lifted by setting the first fastening structure to press against the inner wall of the workpiece to be lifted and the second fastening structure to press against the outer wall of the workpiece to be lifted, effectively ensuring the stable support of the workpiece to be lifted. Moreover, the expansion process of the first fastening structure enables it to reach different sizes, so that at different expansion degrees, the first fastening structure can meet the support and fastening requirements of workpieces to be lifted with different inner cavity structure sizes, effectively improving the versatility of the device. The setting of the second fastening structure not only plays a role in supporting the outer wall, but also can jointly form a clamping effect on the workpiece to be lifted with the first fastening structure, which not only increases the clamping stability, but also can offset the unilateral stress acting on the side wall of the workpiece to be lifted to a certain extent, reducing the risk of damage to the side wall. Description of the Drawings

[0021] The drawings described herein are used to provide a further understanding of the utility model and constitute a part of this application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model. In the drawings:

[0022] Figure 1 The structural schematic diagram of an embodiment of the cylindrical workpiece lifting device of the utility model is shown.

[0023] Figure 2 The sectional view of another embodiment of the cylindrical workpiece lifting device of the utility model is shown.

[0024] Figure 3 The schematic diagram of the cooperation between the first fastening structure and the workpiece to be lifted in an embodiment of the cylindrical workpiece lifting device of the utility model is shown.

[0025] In the figures:

[0026] 1. Workpiece to be lifted;

[0027] 2. First fastening structure; 21. First connecting rod; 22. Second connecting rod; 23. Pushing part; 231. First screw; 232. First turntable; 24. First connecting part; 25. Second connecting part; 251. Connecting part body; 252. Matching part; 26. Expanding rod; 27. Support shaft; 271. Guide groove; 28. Auxiliary slider;

[0028] 3. Second fastening structure; 31. Clamping ring; 311. Ring-shaped body; 312. Insertion part; 313. First limiting part; 314. Second limiting part; 32. Second screw; 33. Elastic part; 34. Second turntable;

[0029] 4. Support structure; 41. Hoisting part;

[0030] 5. First reset mechanism;

[0031] 6. The second reset mechanism. Specific embodiments

[0032] Next, the technical solutions in the embodiments will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 protection scope of the present invention.

[0034] Due to the limitations of the structural characteristics and force characteristics of the workpiece with a cylindrical structure, it is relatively difficult to achieve stable clamping during processing or handling. For example, for components such as a fan disk, it has characteristics such as uneven distribution of contour features and large differences in wall thickness at different positions. The clamping process is likely to cause deformation of its contour, affecting the accuracy of its structural dimensions.

[0035] Therefore, the present invention provides a lifting device for cylindrical workpieces, which can provide stable clamping for the workpiece 1 to be lifted with a cylindrical structure to achieve stable lifting.

[0036] Refer to Figure 1 and Figure 2 As shown, in some embodiments of the lifting device for cylindrical workpieces provided by the present invention, the lifting device for cylindrical workpieces includes a first fastening structure 2, a second fastening structure 3 and a support structure 4. The first fastening structure 2 is used to cooperate with the inner wall of the workpiece 1 to be lifted, and the first fastening structure 2 is configured to expand radially along the workpiece 1 to be lifted to abut against the inner wall of the workpiece 1 to be lifted; the second fastening structure 3 is configured to approach the outer wall of the workpiece 1 to be lifted radially along the workpiece 1 to be lifted to press against the outer wall of the workpiece 1 to be lifted; the support structure 4 is connected between the first fastening structure 2 and the second fastening structure 3, and a lifting portion 41 for connecting with a lifting device is provided on the support structure 4.

[0037] By setting the first fastening structure 2 to abut against the inner wall of the workpiece 1 to be lifted and the second fastening structure 3 to press against the outer wall of the workpiece 1 to be lifted, the double fixation of the inner and outer sides of the workpiece 1 to be lifted is achieved, effectively ensuring the stable support of the workpiece 1 to be lifted.

[0038] Among them, the first fastening structure 2 realizes the support and positioning of the workpiece 1 to be lifted from the inside, which can effectively prevent the radial shaking or deformation of the cylinder during the lifting process. Especially in the processing of some parts with high radial accuracy requirements, improving the radial stability of its clamping can effectively ensure that its processing accuracy meets the process requirements.

[0039] In addition, the first fastening structure 2 is matched with the inner wall of the workpiece 1 to be lifted by expanding. Within the range less than its maximum expansion degree (i.e., the maximum dimension in the radial direction of the workpiece 1 to be lifted), the first fastening structure 2 can reach different expansion degrees during the expansion process. Thus, by adjusting the expansion degree of the first fastening structure 2, it can be matched with the workpieces 1 to be lifted of different specifications, enabling the lifting device for cylindrical workpieces of the present invention to meet the support and fastening requirements of the workpieces 1 to be lifted with different inner cavity structure sizes, effectively improving the versatility of the device.

[0040] Specifically, the first fastening structure 2 is applicable to supporting and fastening the inner walls of cylindrical workpieces of different specifications. For example, by adjusting the expansion degree of the first fastening structure 2, it can be used to fasten and support cylindrical workpieces with different inner diameters, thereby realizing the stable lifting and handling of multiple workpieces; or, during the processing of the same cylindrical workpiece, due to different processing degrees (such as rough machining, semi-finishing, and finishing), it has different inner diameters at different processing stages, and the first fastening structure 2 can adapt to the change of its inner diameter by adjusting the expansion degree; or, the same cylindrical workpiece has different inner diameters at different axial positions, and the first fastening structure 2 can realize the fastening of different positions of the workpiece by adjusting its radial expansion degree to meet the processing requirements of different positions.

[0041] The second fastening structure 3 is set to press against the outer wall of the workpiece 1 to be lifted, which not only plays a role in supporting the outer wall but also can jointly form a clamping effect on the workpiece 1 to be lifted with the first fastening structure 2. This not only increases the clamping stability but also can offset the unilateral stress acting on the side wall of the workpiece 1 to be lifted to a certain extent, reducing the risk of damage to the side wall.

[0042] Among them, one or more second fastening structures 3 can be provided according to actual needs. Specifically, if the purpose is to reduce the overall lifting weight, only one second fastening structure 3 can be provided under the premise of ensuring the clamping stability; and for a workpiece 1 to be lifted with a larger overall specification, more than two second fastening structures 3 can be provided, and the more than two second fastening structures 3 can be evenly distributed in the circumferential direction of the workpiece 1 to be lifted, so as to obtain a more balanced and stable clamping effect.

[0043] The support structure 4 can form a structure for clamping the side wall of the workpiece 1 to be hoisted together with the first fastening structure 2 and the second fastening structure 3, and also play a role in bearing the hoisting force. The support structure 4 and the first fastening structure 2 and the support structure 4 and the second fastening structure 3 can be set to be detachably connected, which is convenient for adjusting the clamping force between the first fastening structure 2 and the second fastening structure 3, and makes the entire device easy to install and disassemble, which can improve the efficiency of the device deployment, transfer, storage and other processes.

[0044] There are many options for the shape and structure of the hanging part 41. For example, Figure 1 As shown in , the hoisting portion 41 can be designed to have a ring-shaped structure that is convenient for hooking. Alternatively, the hoisting portion 41 can also be designed to have a structure with a quick-install connector to facilitate rapid connection with a lifting device to achieve cooperation.

[0045] In some embodiments, the first fastening structure 2 includes a driving mechanism and multiple groups of tensioning components arranged circumferentially along the driving mechanism. The driving mechanism is configured to drive the ends of the multiple groups of tensioning components away from the driving mechanism to move toward the inner wall of the workpiece 1 to be lifted, so that the ends of the multiple groups of tensioning components away from the driving mechanism are pressed against the inner wall of the workpiece 1 to be lifted.

[0046] Multiple groups of circumferentially arranged expansion components can cling to the inner wall of the workpiece from multiple different angles, which can not only reduce the risk of shaking and deflection of the workpiece 1 to be lifted, but also ensure that the inner wall of the workpiece 1 to be lifted is subjected to uniform pressure, reducing deformation or damage caused by uneven local force. Especially for parts with thin-walled structures, made of fragile materials, or with high structural precision requirements, ensuring the uniformity of their circumferential force is very important for maintaining the structural integrity and geometric accuracy of the workpiece.

[0047] The number of expansion assemblies can be set according to actual needs, for example, four, six or seven groups can be set. Multiple groups of expansion assemblies can be evenly arranged along the circumference to ensure that the inner wall of the workpiece 1 to be lifted obtains uniform force.

[0048] During actual use, first, the first fastening structure 2 is coaxially arranged with the inner cavity of the workpiece 1 to be lifted in its inner cavity, and then, by moving the ends of the plurality of expansion assemblies away from the driving mechanism along the radial direction of the workpiece 1 to be lifted, the expansion of the first fastening structure 2 is realized, and further, the inner wall of the workpiece 1 to be lifted is tightened. Among them, the adjustment of the expansion degree of the first fastening structure 2 is realized by adjusting the radial displacement of the distal ends of the expansion assemblies.

[0049] Furthermore, after the first fastening structure 2 expands to a preset radial size, a locking structure can be set to lock it. For example, a self-locking mechanism is set, so that the first fastening structure 2 will not retract or loosen due to the influence of external forces during the expansion process, and can also be locked synchronously when reaching the preset radial size, so as to keep it at a stable expansion degree; or, a multi-stage limiting structure (such as a pin hole structure, a buckle structure, etc.) is set, so that when the first fastening structure 2 expands to the position of any stage of the limiting structure, it can be limited. Through the setting of the self-locking structure or the limiting structure, etc., it can be ensured that the first fastening structure 2 remains stable at the preset expansion degree, so as to realize the reliable support of the workpiece 1 to be lifted.

[0050] In some embodiments, referring to Figure 3 As shown, the expansion assembly includes a first connecting rod 21 and a second connecting rod 22. The first end of the first connecting rod 21 and the first end of the second connecting rod 22 are both connected to the driving mechanism. The second end of the first connecting rod 21 and the second end of the second connecting rod 22 are hinged to each other. The driving mechanism is configured to drive the first end of the first connecting rod 21 and the first end of the second connecting rod 22 to approach each other along the axial direction of the workpiece 1 to be lifted, so that the second end of the first connecting rod 21 and the second end of the second connecting rod 22 move in a direction away from the axis of the workpiece 1 to be lifted, so as to approach the inner wall of the workpiece 1 to be lifted.

[0051] There are various choices for the specific form of the expansion assembly, that is, the adjustment of the expansion degree of the first fastening structure 2 is not limited to being realized by the above-mentioned connecting rod mechanism, and other various feasible means can also be adopted. For example, it can also be set that the expansion assembly includes an expandable structure, or it can be set that the expansion assembly includes a slidable / retractable structure, etc., to realize the movement of the end of the expansion assembly away from the driving mechanism.

[0052] Referring to Figure 3 As shown, in some embodiments, a tightening rod 26 for cooperating with the inner wall of the workpiece 1 to be lifted is provided at the end of the expansion assembly away from the driving mechanism. The two ends of the tightening rod 26 are respectively hinged to the second ends of the first connecting rod 21 and the second connecting rod 22. The tightening rod 26 is configured to approach the inner wall of the workpiece 1 to be lifted and contact the inner wall of the workpiece 1 to be lifted under the drive of the second ends of the first connecting rod 21 and the second connecting rod 22.

[0053] The expansion rod 26 is arranged to contact the inner wall of the workpiece 1 to be lifted, so as to avoid local stress concentration or workpiece damage that may be caused by directly using the end of the connecting rod for contact. Specifically, the side of the expansion rod 26 for contacting the inner wall of the workpiece 1 to be lifted can be arranged to have a larger contact area relative to the side away from the workpiece, so as to disperse the local pressure. And due to the flexibility of the hinge connection between the expansion rod 26 and the connecting rod, it can adapt to the actual shape and size of the inner wall of the workpiece 1 to be lifted to achieve fine adjustment, so as to reach a more fitting state with the inner wall of the workpiece 1 to be lifted.

[0054] In addition, if the expansion rod 26 is worn or damaged after multiple uses, only the expansion rod 26 itself needs to be repaired or replaced, without the need to replace other components, which helps to reduce the maintenance cost of the device.

[0055] The expansion rod 26 can be made of a relatively soft or elastic material, which can not only increase its fitting degree with the inner wall of the workpiece under the state of being extruded, but also reduce the risk of wear or scratch on the inner wall of the workpiece. Protecting the surface quality of the workpiece is crucial, especially for workpieces that require high-precision fitting.

[0056] Reference Figure 2 and Figure 3 As shown, in some embodiments, a protruding portion for cooperating with a limiting structure on the inner wall of the workpiece 1 to be lifted is provided on the side of the expansion rod 26 away from the driving mechanism.

[0057] The cooperation between the protruding portion and the limiting structure can ensure the accurate position of the expansion rod 26 on the inner wall of the workpiece 1 to be lifted, and avoid the dislocation of the expansion rod 26 caused by the rotation or shaking of the workpiece during the lifting process, so as to ensure the stability of the workpiece during lifting.

[0058] In some embodiments, the driving mechanism includes a pushing portion 23, a first connecting portion 24 and a second connecting portion 25. The first connecting portion 24 is hinged to the first ends of a plurality of first connecting rods 21, and the second connecting portion 25 is hinged to the first ends of a plurality of second connecting rods 22. The pushing portion 23 is configured to push the second connecting portion 25 to approach the first connecting portion 24, so as to drive the first ends of the first connecting rods 21 and the first ends of the second connecting rods 22 to approach each other.

[0059] The relative movement between the first connecting portion 24 and the second connecting portion 25 is achieved through the pushing portion 23, causing the first ends of the first link 21 and the second link 22 to approach each other. As a result, the second ends of the first link 21 and the second link 22 are pushed towards the inner wall of the workpiece 1 to be lifted. Furthermore, the ends of multiple expansion assemblies away from the drive mechanism all achieve displacement towards the inner wall of the workpiece. That is to say, the relative movement between the first connecting portion 24 and the second connecting portion 25 is converted into the expansion action of the expansion assemblies. By setting it in this way, as long as the driving distance of the pushing portion 23 to the second connecting portion 25 is adjusted, the expansion degree of the expansion assemblies can be controlled, and the uniform expansion of the inner wall of the workpiece 1 to be lifted can be achieved quickly and conveniently, ensuring the stability and safety of the workpiece during the lifting process.

[0060] Among them, there are various choices for the specific structural form of the pushing portion 23. For example, structures such as push rods, screw drives, and hydraulic cylinder drives can be adopted, as long as the pushing of the second connecting portion 25 can be achieved.

[0061] For example, referring to Figure 2 As shown, in some embodiments, the pushing portion 23 includes a first screw rod 231 that cooperates with the support structure 4. The support structure 4 is provided with a first connection hole with internal threads, and the first screw rod 231 is engaged with the internal threads of the first connection hole to drive the second connecting portion 25 to move towards the first connecting portion 24 by rotating the first screw rod 231.

[0062] When the first screw rod 231 is screwed in the direction close to the first connecting portion 24 (that is, Figure 2 moving from right to left as shown), the first screw rod 231 can abut against and push the second connecting portion 25 to move towards the first connecting portion 24.

[0063] There are various choices for the specific structural form settings of the second connecting portion 25 and the first connecting portion 24. For example, a sleeve structure, a piston structure, etc. can be adopted.

[0064] In some embodiments, the pushing portion 23 further includes a first turntable 232 installed at the end of the first screw rod 231 away from the second connecting portion 25, so that the first screw rod 231 can be conveniently rotated by screwing the first turntable 232.

[0065] In some embodiments, the hoisting device for cylindrical workpieces further includes a first reset mechanism 5 disposed between the first connecting portion 24 and the second connecting portion 25. The first reset mechanism 5 is configured to push the second connecting portion 25 away from the first connecting portion 24 and move it to the initial position.

[0066] There are various choices for the specific form of the first reset mechanism 5. For example, it can be an elastic member such as a spring, or an electromagnetic reset device, etc.

[0067] After the pressure of the pushing part 23 on the second connecting part 25 is released, the first reset mechanism 5 can use its restoring force to quickly return the second connecting part 25 to its initial position, so as to relieve the tightening state of the tightening component, facilitating the subsequent disassembly of the first fastening structure 2.

[0068] Reference Figure 2 As shown, in some embodiments, the driving mechanism further includes a support shaft 27. The support shaft 27 is fixedly connected to the support structure 4. The first connecting part 24 is arranged at one end of the support shaft 27 away from the pushing part 23. The second connecting part 25 is movably matched with the support shaft 27. The pushing part 23 is configured to push the second connecting part 25 along the axial direction of the support shaft 27 towards the first connecting part 24. There are various choices for the structure of the second connecting part 25. For example, it can be an annular structure arranged on the outer periphery of the support shaft 27.

[0069] In other embodiments, the support shaft 27 is a hollow shaft. Reference Figure 3 As shown, a plurality of guiding grooves 271 distributed circumferentially are provided on the side wall of the support shaft 27. The second connecting part 25 includes a connecting part body 251 and a plurality of cooperating parts 252 circumferentially connected to the connecting part body 251. The connecting part body 251 is arranged in the inner cavity of the hollow shaft. The plurality of cooperating parts 252 are respectively inserted into the plurality of guiding grooves 271. One end of the cooperating part 252 away from the connecting part body 251 is hinged to the first end of the second connecting rod 22. Among them, the guiding grooves 271 extend along the axial direction of the support shaft 27 to guide the cooperating parts 252 to move axially along the support shaft 27 relative to the guiding grooves 271.

[0070] By providing the above-mentioned guiding grooves 271 and cooperating parts 252, under the guidance of the guiding grooves 271, the second connecting part 25 can move axially along the support shaft 27 under the drive of the pushing part 23, thus realizing the stable control of the expansion process of the tightening component. Moreover, the design of the hollow shaft makes the overall structure of the driving mechanism compact, saves space, and effectively reduces the overall load of the device, which helps to achieve a lightweight design.

[0071] Reference Figure 2 As shown, in the embodiment where the support shaft 27 is a hollow shaft, the first reset mechanism 5 can also be arranged inside the hollow shaft. One end of the first reset mechanism 5 abuts against the closed end of the hollow shaft, and the other end contacts the connecting part body 251, thereby further saving installation space and achieving a compact layout.

[0072] In other embodiments where the support shaft 27 is a hollow shaft, the driving mechanism further includes an auxiliary slider 28. The auxiliary slider 28 is movably arranged in the inner cavity of the support shaft 27 and is located between the connecting part body 251 and the first screw 231.

[0073] Thus, the pushing part 23 pushes the auxiliary slider 28 to slide, indirectly pushing the second connecting part 25 to move. With such a setting, the structure capable of pushing the pushing part 23 or the support shaft 27 has greater design flexibility. Specifically, the limitation caused by the insufficient length of the output end of the pushing part 23 (such as a push rod, an output shaft, or a screw) can be eliminated, and there is no need to perform an adaptability design on the inner cavity of the support shaft 27 corresponding to the output end of the pushing part 23, simplifying the overall manufacturing process and helping to save costs.

[0074] Reference Figure 1 As shown, in some embodiments, the second fastening structure 3 includes a clamping ring 31. A support surface is provided on one side of the clamping ring 31 facing the first fastening structure 2, and the contour of the support surface matches the outer wall contour of the workpiece 1 to be lifted.

[0075] The clamping ring 31 can provide a pressing force along the radial direction of the workpiece 1 to be lifted. Designing the contour of the support surface of the clamping ring 31 to match the outer wall contour of the workpiece 1 to be lifted can maximize the contact area between the clamping ring 31 and the workpiece 1 to be lifted, improving the stability of the second fastening structure 3 clamping the workpiece 1 to be lifted during the lifting process, thereby enhancing safety.

[0076] In practical applications, the second fastening structure 3 can also be made applicable to cylindrical workpieces with different outer wall contour shapes by adjusting the shape of the clamping ring 31 or replacing it with different clamping rings 31, improving the versatility of the device.

[0077] Reference Figure 1 As shown, in some embodiments, the clamping ring 31 includes an annular body 311, a first limiting part 313, and a second limiting part 314. In the axial direction of the workpiece 1 to be lifted, the first limiting part 313 and the second limiting part 314 are connected to both sides of the annular body 311, so that a limiting groove is formed between the annular body 311, the first limiting part 313, and the second limiting part 314 for engaging with the edge of the flange structure of the workpiece 1 to be lifted, thereby restricting the axial offset of the workpiece 1 to be lifted.

[0078] In some embodiments, the second fastening structure 3 further includes an elastic member 33, and the elastic member 33 is disposed on one side of the clamping ring 31 facing the first fastening structure 2.

[0079] One or more elastic members 33 may be provided and evenly distributed along the extending direction of the clamping ring 31. The elastic members 33 play a role in auxiliary support and buffering. On the one hand, when the size and specification of the workpiece only vary within a small range, the clamping ring 31 does not need to be replaced, and small-range size adjustment can be achieved through the elasticity of the elastic members 33, so that the clamping ring 31 can still effectively cooperate with the outer wall of the workpiece 1 to be lifted and maintain a good fastening effect, that is, the adaptability and versatility of the device are improved; on the other hand, the elastic members 33 can absorb and buffer the impact and vibration during the lifting process, reduce the stress directly acting on the workpiece, and protect the workpiece from damage.

[0080] In some embodiments, the second fastening structure 3 further includes a second screw 32. The support structure 4 is provided with a second connection hole with internal threads, and the second screw 32 is engaged with the internal threads of the second connection hole to drive the clamping ring 31 to move closer to the first fastening structure 2 and press against the outer wall of the workpiece 1 to be lifted by rotating the second screw 32.

[0081] Reference Figure 2 As shown, the second connection hole extends along the radial direction of the workpiece 1 to be lifted. The clamping ring 31 includes an annular body 311 and an insertion portion 312 connected to the annular body 311. The supporting surface of the clamping ring 31 is provided on the annular body 311, and the insertion portion 312 is inserted into the second connection hole. During the process of the second screw 32 screwing into the bottom of the second connection hole, it abuts against the insertion portion 312 and pushes it to move in the direction close to the axis of the workpiece 1 to be lifted, thereby driving the annular body 311 to move, that is, realizing the overall movement of the clamping ring 31.

[0082] In some embodiments, the second fastening structure 3 further includes a second turntable 34 installed at the end of the second screw 32 away from the clamping ring 31, so that the second screw 32 can be conveniently driven to rotate by screwing the second turntable 34.

[0083] In some other embodiments, the cylindrical workpiece lifting device further includes a second reset mechanism 6 disposed between the second screw 32 and the insertion portion 312. The second reset mechanism 6 is configured to push the insertion portion 312 to move in the direction away from the axis of the workpiece 1 to be lifted, so as to drive the clamping ring 31 to move to the initial position.

[0084] The specific structure of the second reset mechanism 6 can be set with reference to the first reset mechanism 5, for example, set as a spring or the like.

[0085] After the pressure of the second screw 32 on the insertion portion 312 is released, the second reset mechanism 6 can make the clamping ring 31 return to the initial position through its restoring force.

[0086] Next, a specific embodiment of the cylindrical workpiece lifting device of the present invention will be described:

[0087] Reference Figures 1 - 3 As shown, the lifting device for cylindrical workpieces includes a first fastening structure 2, a second fastening structure 3, and a support structure 4. The first fastening structure 2 includes a driving mechanism and a plurality of expansion components arranged circumferentially along the driving mechanism. The first fastening structure 2 is configured to expand radially along the workpiece 1 to be lifted to abut against the inner wall of the workpiece 1 to be lifted; the second fastening structure 3 is configured to approach the outer wall of the workpiece 1 to be lifted radially along the workpiece 1 to be lifted to press against the outer wall of the workpiece 1 to be lifted; the support structure 4 is connected between the first fastening structure 2 and the second fastening structure 3, and a lifting portion 41 for connecting with a lifting device is provided on the support structure 4.

[0088] In this embodiment, the lifting portion 41 includes a lifting ring, and its setting position is related to the center of gravity of the workpiece 1 to be lifted, that is, it is designed based on the mass and structural characteristics of the workpiece 1 to be lifted. Thus, after the lifting device for cylindrical workpieces of the present utility model completes the clamping of the workpiece 1 to be lifted, the position of the lifting portion 41 is exactly on the vertical extension line of the lifting center of gravity of the workpiece 1 to be lifted, thereby ensuring the stability of lifting.

[0089] In this embodiment, the first fastening structure 2 includes a driving mechanism and six groups of expansion components arranged evenly circumferentially along the driving mechanism.

[0090] Specifically, the driving mechanism includes a support shaft 27, a first turntable 232, a first screw 231, an auxiliary slider 28, a first connecting portion 24, and a second connecting portion 25. The first turntable 232 is fixedly connected to the first screw 231. The support shaft 27 is fixedly connected to the support structure 4. The support shaft 27 is a hollow shaft. The support structure 4 is provided with a first connection hole with internal threads, and the first connection hole communicates with the inner cavity of the support shaft 27. The first screw 231 is engaged with the internal threads of the first connection hole. The first connecting portion 24 is provided at one end of the support shaft 27 away from the pushing portion 23. The second connecting portion 25 is movably engaged with the guiding groove 271 on the support shaft 27 through its engaging portion 252. The auxiliary slider 28 is movably arranged in the inner cavity of the support shaft 27, and the auxiliary slider 28 is located between the second connecting portion 25 and the first screw 231. The guiding groove 271 extends along the axial direction of the support shaft 27. By screwing the first turntable 232 to drive the first screw 231 to screw into the second connecting portion 25, the first screw 231 can push the auxiliary slider 28, and then push the second connecting portion 25 to approach the first connecting portion 24 along the guiding groove 271.

[0091] The expansion assembly includes a first connecting rod 21, a second connecting rod 22, and an expansion rod 26. The first end of the first connecting rod 21 is hinged to the first connecting portion 24, the first end of the second connecting rod 22 is hinged to the mating portion 252 of the second connecting portion 25, and both ends of the expansion rod 26 are respectively hinged to the second end of the first connecting rod 21 and the second end of the second connecting rod 22. Moreover, a convex portion for cooperating with the limiting structure on the inner wall of the workpiece 1 to be lifted is provided on the expansion rod 26.

[0092] When the first screw 231 pushes the second connecting portion 25 towards the first connecting portion 24, it can drive the first end of the second connecting rod 22 towards the first end of the first connecting rod 21, thereby pushing the expansion rod 26 to move in a direction away from the support shaft 27, realizing the expansion of the first fastening structure 2.

[0093] The second fastening structure 3 includes a clamping ring 31, a second turntable 34, a second screw 32, and an elastic member 33. The elastic member 33 is arranged on one side of the clamping ring 31 facing the first fastening structure 2.

[0094] The support structure 4 is provided with a second connection hole with internal threads. The second connection hole extends along the radial direction of the workpiece 1 to be lifted. The second turntable 34 is connected to the end of the second screw 32, and the second screw 32 is engaged with the internal threads of the second connection hole.

[0095] The clamping ring 31 includes an annular body 311, an insertion portion 312 connected to the annular body 311, a first limiting portion 313, and a second limiting portion 314. The supporting surface of the clamping ring 31 is arranged on the annular body 311, and the insertion portion 312 is inserted into the second connection hole. In the axial direction of the workpiece 1 to be lifted, the first limiting portion 313 and the second limiting portion 314 are connected to both sides of the annular body 311. Thus, a limiting groove for engaging with the edge of the flange structure of the workpiece 1 to be lifted is formed by enclosing between the annular body 311, the first limiting portion 313, and the second limiting portion 314.

[0096] During the process of the second screw 32 screwing into the bottom of the second connection hole, it abuts against the insertion portion 312 and pushes it to move towards the axis of the workpiece 1 to be lifted, thereby driving the annular body 311 to move, that is, realizing the overall movement of the clamping ring 31 towards the outer wall of the workpiece 1 to be lifted.

[0097] In this embodiment, the cylindrical workpiece lifting device further includes a first reset mechanism 5 arranged between the first connecting portion 24 and the second connecting portion 25, and a second reset mechanism 6 arranged between the second screw 32 and the insertion portion 312. Both the first reset mechanism 5 and the second reset mechanism 6 are arranged as springs.

[0098] Reference Figure 1As shown, in this embodiment, the support structure 4 is provided to include a frame structure, which provides connection and support through the frame structure, and provides axial and radial support forces for the workpiece 1 to be lifted, so that the entire cylindrical workpiece lifting device becomes a reasonable and effective force-bearing combination.

[0099] The first fastening structure 2 can realize self-adaptive adjustment of the expansion degree in the radial direction of the workpiece 1 to be lifted to adapt to different allowances during the processing of the workpiece 1 to be lifted; the first fastening structure 2, the second fastening structure 3 and the support structure 4 together realize the clamping and support of the workpiece 1 to be lifted. Through the above settings, the cylindrical workpiece lifting device of the present invention can realize stable clamping of the workpiece 1 to be lifted, so as to facilitate the lifting operation.

[0100] In the case where the workpiece 1 to be lifted is the fan disc of an engine, the process of using the cylindrical workpiece lifting device of the present invention to cooperate with a crane to lift the fan disc at least includes the following steps:

[0101] 1. Hang the hook of the crane into the ring position of the lifting part 41, and turn the first turntable 232 to retract the expansion assembly of the first fastening structure 2 to a size smaller than the inner hole of the fan disc;

[0102] 2. Slowly insert the first fastening structure 2 into the inner hole of the fan disc until the protrusion on the expansion rod 26 approaches the limiting structure on the inner wall of the fan disc (in this embodiment, this limiting structure corresponds to the position of the smallest step on the inner wall of the fan disc);

[0103] 3. Turn the first turntable 232 to start synchronously expanding the six expansion assemblies, so that the protrusions on the expansion rods 26 of the six expansion assemblies are completely stuck into the above-mentioned smallest step position, and the six expansion rods 26 are completely tightened against the inner wall, so that each connecting rod in the expansion assembly is fully stressed and the expansion is completed;

[0104] 4. Turn the second turntable 34 to make the second screw 32 screw in, so that the clamping ring 31 presses down and clamps the two end faces of the flange of the fan disc through the limiting groove;

[0105] 5. Complete the fixation of the cylindrical workpiece lifting device, release the clamping tool originally used to fix the fan disc, start lifting, horizontally move the lifting device, and lift the fan disc to the V-shaped table;

[0106] 6. Loosen the first turntable 232 and the second turntable 34 to retract each expansion assembly to a size smaller than the inner hole of the fan disc, and release the pressing force of the clamping ring 31;

[0107] 7. Move the lifting device out along the axial direction of the fan disc to realize the disassembly of the lifting device, place the lifting device in a safe position, and complete the lifting.

[0108] The above lifting process is efficient and safe, with high stability and reliability. Under the uniform expansion of the six groups of expansion components, the inner contour of the fan disc has no deformation, ensuring the machining accuracy of the fan disc.

[0109] Through the description of multiple embodiments of the lifting device for cylindrical workpieces of the present utility model, it can be seen that the lifting device for cylindrical workpieces of the present utility model realizes double fixation of the inner and outer walls of the cylindrical workpiece by setting a first fastening structure to expand the inner wall and a second fastening structure to press the outer wall. Among them, the second fastening structure can not only provide additional support, but also cooperate with the first fastening structure to reduce the unilateral stress on the side wall of the workpiece, which helps to enhance the stability during the lifting process. In addition, the expansion degree of the first fastening structure can be adaptively adjusted according to the specifications of the workpiece, and the clamping ring of the second fastening structure is movably arranged, which can adapt to cylindrical workpieces of different sizes, improving the versatility and adaptability of the device and meeting the lifting requirements of various workpieces.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them; although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that without departing from the principle of the present utility model, modifications can still be made to the specific implementation manners of the present utility model or some technical features can be equivalently replaced, and these modifications and equivalent replacements should all be covered within the scope of the technical solutions claimed by the present utility model.

Claims

1. A cylindrical workpiece lifting device, characterized in that: include: A first fastening structure (2) is used to cooperate with the inner wall of the workpiece (1) to be lifted, and the first fastening structure (2) is configured to expand along the radial direction of the workpiece (1) to be lifted so as to press against the inner wall of the workpiece (1) to be lifted; A second fastening structure (3) is configured to approach the outer wall of the workpiece (1) to be lifted along the radial direction of the workpiece (1) to be lifted, so as to press the outer wall of the workpiece (1) to be lifted; and A support structure (4) is connected between the first fastening structure (2) and the second fastening structure (3), and a hoisting portion (41) for connecting to a hoisting device is provided on the support structure (4).

2. The cylindrical workpiece lifting device according to claim 1, characterized in that: The first fastening structure (2) comprises a driving mechanism and a plurality of tensioning components arranged circumferentially along the driving mechanism, wherein the driving mechanism is configured to drive one end of the plurality of tensioning components away from the driving mechanism to move toward an inner wall of the workpiece (1) to be lifted, so that one end of the plurality of tensioning components away from the driving mechanism presses against the inner wall of the workpiece (1) to be lifted.

3. The cylindrical workpiece lifting device according to claim 2, characterized in that: The tensioning assembly comprises a first connecting rod (21) and a second connecting rod (22), wherein the first end of the first connecting rod (21) and the first end of the second connecting rod (22) are both connected to the driving mechanism, and the second end of the first connecting rod (21) and the second end of the second connecting rod (22) are hinged to each other, and the driving mechanism is configured to drive the first end of the first connecting rod (21) and the first end of the second connecting rod (22) to approach each other along the axial direction of the workpiece (1) to be lifted, so that the second end of the first connecting rod (21) and the second end of the second connecting rod (22) move in a direction away from the axis of the workpiece (1) to be lifted, thereby approaching the inner wall of the workpiece (1) to be lifted.

4. The cylindrical workpiece lifting device according to claim 3, characterized in that: An end of the tensioning assembly away from the driving mechanism is provided with a tensioning rod (26) for cooperating with the inner wall of the workpiece (1) to be lifted, and both ends of the tensioning rod (26) are respectively hinged to the second ends of the first connecting rod (21) and the second connecting rod (22), and the tensioning rod (26) is configured to approach the inner wall of the workpiece (1) to be lifted and contact the inner wall of the workpiece (1) to be lifted under the drive of the second end of the first connecting rod (21) and the second end of the second connecting rod (22).

5. The cylindrical workpiece lifting device according to claim 4, characterized in that: A protrusion is provided on the side of the expansion rod (26) away from the driving mechanism for cooperating with a limiting groove on the inner wall of the workpiece (1) to be lifted.

6. The cylindrical workpiece lifting device according to claim 3, characterized in that: The driving mechanism comprises a pushing portion (23), a first connecting portion (24) and a second connecting portion (25), wherein the first connecting portion (24) is hingedly connected to the first ends of the plurality of first connecting rods (21), and the second connecting portion (25) is hingedly connected to the first ends of the plurality of second connecting rods (22), and the pushing portion (23) is configured to push the second connecting portion (25) toward the first connecting portion (24), so as to drive the first end of the first connecting rod (21) and the first end of the second connecting rod (22) to approach each other.

7. The cylindrical workpiece lifting device according to claim 6, characterized in that: It also comprises a first reset mechanism (5) arranged between the first connection part (24) and the second connection part (25), wherein the first reset mechanism (5) is configured to push the second connection part (25) away from the first connection part (24) and move to an initial position.

8. The cylindrical workpiece lifting device according to claim 6, characterized in that: The pushing portion (23) comprises a first screw rod (231) cooperating with the supporting structure (4); the supporting structure (4) is provided with a first connecting hole with an internal thread; the first screw rod (231) cooperates with the internal thread of the first connecting hole, so that the second connecting portion (25) is driven to move toward the first connecting portion (24) by rotating the first screw rod (231).

9. The cylindrical workpiece lifting device according to claim 1, characterized in that: The second fastening structure (3) comprises a clamping ring (31), and a support surface is provided on a side of the clamping ring (31) facing the first fastening structure (2), wherein the contour of the support surface matches the contour of the outer wall of the workpiece (1) to be lifted.

10. The cylindrical workpiece lifting device according to claim 9, characterized in that: The second fastening structure (3) further comprises a second screw rod (32), and the supporting structure (4) is provided with a second connecting hole with an internal thread, and the second screw rod (32) cooperates with the internal thread of the second connecting hole so that the clamping ring (31) is driven to approach the first fastening structure (2) and press the outer wall of the workpiece (1) to be lifted by rotating the second screw rod (32).

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