Lifting appliance and lifting method for annular through hole products

Abstract

The invention discloses a lifting appliance and a lifting method for annular through hole products. The lifting appliance comprises a cross beam; lifting lugs used for being connected with lifting equipment are arranged on the cross beam; two groups of support rods; the two supporting rods are arranged at the two ends of the cross beam correspondingly. A hoisting convex block is arranged at the bottom end of the supporting rod; two groups of steering assemblies; the two steering assemblies are matched with the two supporting rods in position. The steering assembly is connected with the cross beam; the steering assembly has a locking state and a free state; the hoisting device has the beneficial effects that the steering assembly is switched between the free state and the locking state, the supporting rod can be driven to swing, the hoisting protruding block can be flexibly switched between the folded configuration and the hoisting configuration, when the steering assembly is in the free state, the hoisting protruding block is switched into the folded configuration, and the hoisting protruding block can be conveniently hoisted. The lifting device can be quickly and vertically placed into a through hole of the annular through hole type product and can be conveniently withdrawn from the through hole after lifting is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of ring-shaped through-hole product lifting appliance and hoisting method. BACKGROUND

[0002] In the production and transportation, assembly and debugging of ring-shaped through-hole products (such as mechanical components with central through-hole, ring-shaped castings, etc.), hoisting operation is the key process to ensure efficient flow. Such products need to rely on the central through-hole to realize the positioning and support of the lifting appliance, but the existing lifting appliance has significant defects in adaptability, operability and safety, which is difficult to meet the actual operation demand.

[0003] The supporting part of the traditional lifting appliance is mostly a fixed structure that cannot be adjusted, and cannot realize the shape conversion according to the characteristics of the product through-hole. If the supporting part is sized to fit the inner diameter of the through-hole to be placed vertically, there is not enough supporting area during hoisting, making it difficult to stably bear the weight of the product; if it is designed as an unfolded structure to ensure the supporting strength, the horizontal size is too large to be directly inserted vertically into the through-hole, and it needs to be slowly probed and connected at an inclined angle, which not only consumes time in operation, but also is prone to collision with the inner wall of the through-hole, causing damage to the surface of the product or structural impact. At the same time, after lifting is completed, the fixed supporting part is also difficult to quickly withdraw from the through-hole, greatly prolonging the single operation cycle. In view of this, the present application proposes a kind of ring-shaped through-hole product lifting appliance and hoisting method to solve the above problems. SUMMARY

[0004] The present application aims to provide a kind of ring-shaped through-hole product lifting appliance and hoisting method to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A kind of ring-shaped through-hole product lifting appliance, comprising: a crossbeam, the crossbeam is provided with a lifting lug for connecting a lifting device; two groups of supporting rods, the two groups of supporting rods are respectively arranged at both ends of the crossbeam, and the bottom end of the supporting rod is provided with a hoisting protruding block; two groups of steering assemblies, the two groups of steering assemblies are positionally matched with the two groups of supporting rods, the steering assembly is connected with the crossbeam, and the steering assembly has a locked state and a free state; When the steering assembly is in the free state, the supporting rod swings, so that the hoisting protruding block switches between the folded configuration that can be placed vertically into the product through-hole and the hoisting configuration that can hoist the product through-hole; When the steering assembly is in the locked state, the supporting rod is fixed, so that the hoisting protruding block remains in the folded configuration or the hoisting configuration.

[0006] As the improvement of the above technical scheme, two groups of mounting seats are symmetrically arranged on the cross beam, and the mounting seats are connected with the cross beam through bolts. The mounting seat is provided with a mounting round sleeve, and the mounting round sleeve is provided with a mounting through hole.

[0007] As the improvement of the above technical scheme, two groups of cross beam mounting holes are arranged on the cross beam, and the two groups of mounting round sleeves are arranged in the two groups of cross beam mounting holes. The mounting through hole is not coaxially arranged with the mounting round sleeve, so that the lifting protruding block can be switched between coinciding with the bottom end face of the mounting round sleeve and not coinciding with the bottom end face of the mounting round sleeve. The lifting protruding block is coincided with the bottom end face of the mounting round sleeve, so that the lifting protruding block forms a folding configuration which can be vertically placed into the product through hole. The lifting protruding block is not coincided with the bottom end face of the mounting round sleeve, so that the lifting protruding block forms a lifting configuration which can lift the product through hole.

[0008] As the improvement of the above technical scheme, the steering assembly comprises a steering block, the steering block is provided with a steering through hole, and the steering through hole is coaxially arranged with the mounting through hole. The support rod is arranged in the steering through hole, and the support rod is provided with a threaded nut, the threaded nut is connected with the support rod, so that the support rod is positioned in the steering through hole and the mounting through hole.

[0009] As the improvement of the above technical scheme, the steering through hole is provided with a positioning groove, the support rod is provided with a positioning block, and the support rod is arranged in the steering through hole, so that the positioning block is arranged in the positioning groove.

[0010] As the improvement of the above technical scheme, the steering block is provided with a locking through hole, and the locking through hole is symmetrically arranged on the steering block with the steering through hole. The locking through hole is provided with a latch, and the latch is in contact with the mounting seat, so that the steering block is locked on the mounting seat.

[0011] As the improvement of the above technical scheme, two groups of locking grooves are arranged on the mounting seat, the two groups of locking grooves are symmetrically arranged, and the mounting through hole is arranged between the two groups of locking grooves. The latch is arranged in the locking groove, so that the steering block is locked on the mounting seat.

[0012] A lifting method of a lifting device for a ring-shaped through hole product, comprising the following steps: Step S1, unlocking the lifting device steering: The pin is pulled out of the locking hole in the steering block, and the steering block is disengaged from the locking groove on the mounting seat, and the steering assembly is switched to a free state; because the positioning block is placed in the positioning groove, the support rod can change state as the steering block rotates; Step S2, switch to the folded configuration: Based on the non-coaxial design of the mounting hole of the mounting sleeve on the beam and the mounting hole of the support rod, the steering block at both ends of the beam is rotated to drive the support rod to rotate, so that the lifting protruding block at the bottom end of the support rod is swung to completely coincide with the bottom end face of the mounting sleeve, forming a folded configuration that fits the inner diameter of the product hole, avoiding interference between the lifting protruding block and the inner wall of the hole; Step S3, the lifting device is connected to the product: The lifting protruding block and the support rod in the folded configuration are precisely placed in the vertical direction into the hole of the annular hole product, until the lifting protruding block completely passes out of the lower end face of the product hole, ensuring that the lifting protruding block has the space condition to switch to the lifting configuration; Step S4, switch to the lifting configuration and lock: The steering block is rotated in the opposite direction, causing the support rod to rotate in the opposite direction, driving the lifting protruding block to swing with the support rod to completely misalign with the bottom end face of the mounting sleeve, forming a lifting configuration that can support the lower end face of the product hole. At this time, the pin is inserted into the corresponding locking groove of the mounting seat, and the steering assembly is switched to a locked state, realizing the position fixation of the support rod to maintain the lifting configuration; Step S5, implement the lifting operation: The lifting device is stably connected with the lifting lug on the beam, and the lifting device is started. Through the balanced force structure formed by the symmetrical support rods and the lifting protruding blocks at both ends of the beam, the product is smoothly lifted, avoiding product deviation or falling during lifting.

[0013] As an improvement of the above technical solution, the specific operation of "switching the steering assembly to a free state" in step 8 and "switching the steering assembly to a locked state" in step 4 further includes: The steering block is fitted with the support rod through the steering hole, and the steering hole is coaxially arranged with the mounting hole of the mounting sleeve on the mounting seat. The support rod is positioned in the steering hole and the mounting hole by a threaded nut, avoiding the support rod from moving along the axial direction; After pulling out the pin in step 1, the support rod can rotate synchronously with the steering block. The positioning block placed in the positioning groove provides a limit for the swinging of the support rod, preventing the support rod from turning without the steering block; After the pin is inserted into the locking groove in step 4, the steering block and the mounting seat are rigidly fixed, and then the positioning block is placed in the positioning groove to limit the rotation of the support rod, ensuring that the lifting protruding block does not deviate in the bearing state.

[0014] As an improvement of the above technical solution, the hoisting method further comprises a hoist dismounting step after hoisting is completed, and specifically as follows: Step S6, after the product is positioned and fixed, the steering block is unlocked: The pin in the locking hole is pulled out, the steering block is released from the constraint of the locking groove of the mounting seat, the steering assembly returns to a free state, and the angle locking of the support rod is released; Step S7, switching to the folding configuration: The steering block is rotated, the non-coaxial design of the mounting hole and the mounting round sleeve is utilized, the hoisting protruding block is swung to completely coincide with the bottom end face of the mounting round sleeve, and the folding configuration is returned; Step S8, the hoist is withdrawn: The support rod and the hoisting protruding block in the folding configuration are withdrawn from the product hole in the vertical direction, and the separation of the hoist and the product is completed; And during the dismounting process, the symmetrical structure at both ends of the cross beam always maintains force balance, so that the hoist is prevented from shaking and colliding with the product during withdrawal.

[0015] Compared with the prior art, the present application has the following advantages: Through switching of the steering assembly between the free state and the locked state, the support rod can be driven to swing, the hoisting protruding block can be flexibly switched between the folding configuration and the hoisting configuration, when the steering assembly is in the free state, the hoisting protruding block is switched to the folding configuration, can be quickly and vertically placed into the hole of the annular hole type product, and is convenient to withdraw from the hole after hoisting is completed; after being switched to the hoisting configuration, the steering assembly is locked to fix the shape, without complex positioning operation, the docking and separation process of the hoist and the product is greatly simplified; When the steering assembly is in the locked state, the support rod is firmly fixed, the hoisting protruding block is stably kept in the hoisting configuration, and the weight of the annular hole type product can be reliably borne; meanwhile, the two groups of support rods symmetrically arranged at both ends of the cross beam and the hoisting protruding block form a balanced force structure, the stable connection of the lifting lugs on the cross beam and the hoisting equipment is cooperated, the product is effectively prevented from deviating and falling off during hoisting, and the safety factor of the hoisting operation is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The figure is a structural schematic diagram of the present application; Figure 2 The figure is a structural schematic diagram of the cross beam of the present application; Figure 3 The figure is a structural schematic diagram of the steering assembly of the present application; Figure 4 The figure is a structural schematic diagram of the mounting seat of the present application; Figure 5 The figure is a structural schematic diagram of the steering block of the present application; Figure 6 The figure is a structural schematic diagram of the support rod of the present application; Figure 7 For the present invention Figure 1 Side view; Figure 8 For the present invention Figure 7 Sectional view of AA; Figure 9 For the present invention Figure 8 A magnified structural diagram at point B in the middle.

[0017] In the diagram: 10. Crossbeam; 11. Lifting lug; 12. Crossbeam mounting hole; 20. Mounting base; 21. Mounting sleeve; 22. Locking groove; 23. Mounting through hole; 30. Support rod; 31. Nut; 32. Lifting protrusion; 33. Positioning block; 40. Steering assembly; 41. Pin; 42. Steering block; 43. Locking through hole; 44. Steering through hole; 45. Positioning groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example: like Figures 1-9 As shown, this embodiment proposes a lifting device for annular through-hole products, including: Crossbeam 10; the crossbeam 10 is provided with lifting lugs 11 for connecting lifting equipment; Two sets of support rods 30; the two sets of support rods 30 are respectively set at both ends of the crossbeam 10; the bottom end of the support rod 30 is provided with a lifting protrusion 32; Two sets of steering assemblies 40; the two sets of steering assemblies 40 are matched with the two sets of support rods 30; the steering assemblies 40 are connected to the crossbeam 10; the steering assemblies 40 have a locked state and a free state; When the steering component 40 is in a free state, the support rod 30 swings, causing the lifting protrusion 32 to switch between a retracted configuration that can vertically insert into the product through hole and a lifting configuration that can lift the product through hole. When the steering assembly 40 is in the locked state, the support rod 30 is fixed, so that the lifting protrusion 32 maintains the folded configuration or the lifting configuration.

[0020] In this embodiment, when the annular through-hole product is hoisted, the steering assembly 40 is in a free state, and the support rod 30 swings so that the hoisting protruding block 32 forms a retracted configuration capable of being vertically placed into the product through-hole, and the support rod 30 and the hoisting protruding block 32 are placed into the through-hole of the annular through-hole product until the hoisting protruding block 32 passes through the product through-hole, and then the support rod 30 swings again so that the hoisting protruding block 32 forms a hoisting configuration capable of hoisting the product through-hole. After the shape switching is completed, the steering assembly 40 is in a locked state, the support rod 30 is fixed so that the hoisting protruding block 32 remains in the hoisting configuration, and then the lifting lug 11 is hoisted by the hoisting equipment, thereby hoisting the annular through-hole product; Of course, after the hoisting is completed, the steering assembly 40 is in a free state, the support rod 30 swings so that the hoisting protruding block 32 forms a retracted configuration capable of being vertically placed into the product through-hole, and then the support rod 30 and the hoisting protruding block 32 are withdrawn from the product through-hole; Through switching of the steering assembly 40 between the free state and the locked state, the support rod 30 can be driven to swing, and the hoisting protruding block 32 can be flexibly switched between the retracted configuration and the hoisting configuration. When the steering assembly 40 is in the free state, the hoisting protruding block 32 is switched to the retracted configuration, can be quickly vertically placed into the through-hole of the annular through-hole product, and is convenient for being withdrawn from the through-hole after the hoisting is completed. After being switched to the hoisting configuration, the steering assembly 40 is locked to fix the shape, without the need for complex positioning operation, thereby greatly simplifying the docking and separation process of the lifting appliance and the product; When the steering assembly 40 is in the locked state, the support rod 30 is firmly fixed, so that the hoisting protruding block 32 stably remains in the hoisting configuration and reliably bears the weight of the annular through-hole product. Meanwhile, the two groups of support rods 30 and hoisting protruding blocks 32 symmetrically arranged at the two ends of the cross beam 10 form a balanced force bearing structure, cooperates with the stable connection of the lifting lug 11 on the cross beam 10 and the hoisting equipment, effectively avoids product deviation and falling off during hoisting, and significantly improves the safety factor of hoisting operation.

[0021] Specifically, two groups of mounting seats 20 are symmetrically arranged on the cross beam 10, and the mounting seat 20 is connected with the cross beam 10 through bolts; The mounting seat 20 is provided with a mounting circular sleeve 21, the mounting circular sleeve 21 is provided with a mounting through-hole 23, and the support rod 30 is rotationally arranged in the mounting through-hole 23.

[0022] In this embodiment, the detachable fixing of the mounting seat 20 and the cross beam 10 is realized through bolt connection, which not only facilitates the early assembly and positioning of components such as the mounting seat 20 and the mounting round sleeve 21, but also enables quick disassembly and replacement when the components are worn or damaged, without the need to disassemble the cross beam 10 body, thereby greatly reducing the maintenance cost and downtime of the lifting appliance; at the same time, the supporting rod 30 is rotatably arranged in the mounting through hole 23 of the mounting round sleeve 21, and is designed in a split assembly manner, which simplifies the connection process between the supporting rod 30 and the cross beam 10 and improves the overall assembly efficiency.

[0023] Specifically, two groups of cross beam mounting holes 12 are formed in the cross beam 10, and two groups of mounting round sleeves 21 are arranged in the two groups of cross beam mounting holes 12; The mounting through hole 23 is not coaxially arranged with the mounting round sleeve 21, so that the lifting protruding block 32 can be switched between coinciding and not coinciding with the bottom end face of the mounting round sleeve 21; The lifting protruding block 32 coincides with the bottom end face of the mounting round sleeve 21, so that the lifting protruding block 32 forms a folding configuration that can be vertically placed into the product through hole; The lifting protruding block 32 does not coincide with the bottom end face of the mounting round sleeve 21, so that the lifting protruding block 32 forms a lifting configuration that can lift the product through hole.

[0024] In this embodiment, the mounting through hole 23 and the mounting round sleeve 21 are arranged differently, so that the supporting rod 30 produces eccentric displacement when rotating in the mounting through hole 23, directly driving the lifting protruding block 32 and the bottom end face of the mounting round sleeve 21 to form a coinciding or non-coinciding state. When coinciding, it corresponds to the folding configuration, and when not coinciding, it corresponds to the lifting configuration. This design does not require additional driving components, and the configuration switching can be completed only by mechanical rotation of the supporting rod 30, simplifying the operation process and control logic of the lifting appliance and reducing the risk of human operation errors; The two groups of cross beam mounting holes 12 formed in the cross beam 10 provide a precise embedding reference for the mounting round sleeve 21, ensuring the symmetry of the two groups of mounting round sleeves 21 on the cross beam 10, and further ensuring the consistency of the movement trajectories of the supporting rod 30 and the lifting protruding block 32; at the same time, the mounting round sleeve 21 is embedded in the cross beam mounting hole 12 to form an embedded connection structure, which further enhances the connection strength of the mounting round sleeve 21 and the cross beam 10 compared with simple bolt fixation, avoids loosening or deviation of the mounting round sleeve 21 during lifting, and improves the load stability of the overall structure; The coincidence and non-coincidence of the lifting protruding block 32 and the bottom end face of the mounting round sleeve 21 are used as configuration judgment marks, so that the operator can directly confirm the folding or lifting configuration of the lifting protruding block 32 through visual observation without relying on complex detection devices, significantly improving the efficiency and accuracy of configuration verification before lifting; combined with the locking function of the steering assembly 40, the configuration can be quickly locked after switching to the correct position, ensuring the safety and reliability of the lifting operation.

[0025] Specifically, the turning assembly 40 comprises a turning block 42, the turning block 42 is provided with a turning through hole 44, the turning through hole 44 is coaxially arranged with the mounting through hole 23; The support rod 30 is arranged in the turning through hole 44, the support rod 30 is provided with a threaded nut 31, the threaded nut 31 is connected with the support rod 30, so that the support rod 30 is positioned in the turning through hole 44 and the mounting through hole 23.

[0026] In this embodiment, the coaxial arrangement of the turning through hole 44 and the mounting through hole 23 provides a turning support reference for the support rod 30 with both ends aligned, so that the support rod 30 forms a coaxial turning structure between the turning block 42 and the mounting sleeve 21, effectively avoiding the rotation jamming and stagnation of the support rod 30 caused by the deviation of the support axis; in combination with the matching of the support rod 30 and the two through holes, the frictional resistance in the turning process is significantly reduced, ensuring that the lifting protruding block 32 moves more smoothly and smoothly when switching between the folding and lifting configurations.

[0027] Specifically, the turning through hole 44 is provided with a positioning groove 45, the support rod 30 is provided with a positioning block 33, the support rod 30 is arranged in the turning through hole 44, so that the positioning block 33 is placed in the positioning groove 45.

[0028] In this embodiment, by arranging the positioning block 33 in the positioning groove 45, when the turning block 42 rotates, the support rod 30 can be rotated by the cooperation between the positioning block 33 and the positioning groove 45, so as to adjust the position of the lifting protruding block 32.

[0029] Specifically, the turning block 42 is provided with a locking through hole 43, the locking through hole 43 is symmetrically arranged on the turning block 42 with the turning through hole 44; The locking through hole 43 is provided with a latch 41, the latch 41 is in contact with the mounting seat 20, so that the turning block 42 is locked on the mounting seat 20.

[0030] Specifically, the mounting seat 20 is provided with two groups of locking grooves 22, the two groups of locking grooves 22 are symmetrically arranged, and the mounting through hole 23 is arranged between the two groups of locking grooves 22; The latch 41 is placed in the locking groove 22, so that the turning block 42 is locked on the mounting seat 20.

[0031] In this embodiment, the locking pin 41 in the symmetrically arranged locking hole 43 on the steering block 42 is inserted into the symmetrically arranged locking slot 22 on the mounting seat 20 to form a fitting cooperation, so that the steering block 42 can be quickly positioned and locked at the preset position of the mounting seat 20, effectively limiting the rotation freedom of the steering block 42 relative to the mounting seat 20, and providing stable structural constraints for the configuration fixation of the support rod 30 and the lifting protruding block 32; The two groups of symmetrically distributed locking slots 22 correspond to the folded configuration and the lifting configuration of the lifting protruding block 32, respectively. The symmetric arrangement of the locking hole 43 and the locking slot 22 can accurately match the locking point position in the two working states of the lifting device, ensuring that the steering block 42 can be reliably locked through the fitting of the locking pin 41 and the corresponding locking slot 22 when the lifting device switches to any configuration of folding or lifting, meeting the configuration fixation requirements of the lifting device in the whole process of docking, lifting, and separation.

[0032] A lifting method of a lifting device for a ring-shaped through-hole product, comprising the following steps: Step S1, unlocking the lifting device steering: The locking pin 41 in the locking hole 43 on the steering block 42 is pulled out, so that the steering block 42 is separated from the locking slot 22 on the mounting seat 20, and the steering assembly 40 is switched to a free state; since the positioning block 33 is placed in the positioning slot 45, the support rod 30 can change its state by rotating the steering block 42; Step S2, switching to the folded configuration: Based on the non-coaxial design of the mounting hole 23 of the support rod 30 rotatingly fitted with the mounting round sleeve 21 of the mounting seat 20 on the cross beam 10, the steering block 42 at both ends of the cross beam 10 is rotated to drive the support rod 30 to rotate, so that the lifting protruding block 32 at the bottom end of the support rod 30 is swung to completely coincide with the bottom end face of the mounting round sleeve 21, forming a folded configuration that is adapted to the inner diameter of the product through-hole, avoiding interference between the lifting protruding block 32 and the inner wall of the through-hole; Step S3, docking the lifting device with the product: The lifting protruding block 32 and the support rod 30 in the folded configuration are accurately placed into the through-hole of the ring-shaped through-hole product along the vertical direction until the lifting protruding block 32 completely penetrates out of the lower end face of the product through-hole, ensuring that the lifting protruding block 32 has the space condition to switch to the lifting configuration; Step S4, switching to the lifting configuration and locking: The steering block 42 is reversely rotated to reversely rotate the support rod 30, driving the lifting protruding block 32 to swing with the support rod 30 to completely misalign with the bottom end face of the mounting round sleeve 21, forming a lifting configuration that can support the lower end face of the product through-hole. At this time, the locking pin 41 is inserted into the corresponding locking slot 22 of the mounting seat 20, the steering assembly 40 is switched to a locked state, and the position of the support rod 30 is fixed to maintain the lifting configuration; Step S5, performing lifting operation: The hoisting device is stably connected with the lifting lugs 11 on the cross beam 10, the hoisting device is started, the balanced force structure formed by the support rods 30 and the lifting protruding blocks 32 symmetrically arranged at both ends of the cross beam 10 is used to stably hoist the product, and the product is prevented from deviating or falling off during hoisting.

[0033] Specifically, the specific operations of the "steering assembly 40 switches to the free state" in step 1 and the "steering assembly 40 switches to the locked state" in step 4 further include: The steering block 42 is sleeved with the support rod 30 through the steering through hole 44, and the steering through hole 44 is coaxially arranged with the mounting through hole 23 of the mounting circular sleeve 21 on the mounting seat 20. The support rod 30 is positioned in the steering through hole 44 and the mounting through hole 23 through the threaded nut 31, so as to prevent the support rod 30 from moving along the axial direction; After the pin 41 is pulled out in step 1, the support rod 30 can be synchronously rotated with the steering block 42. The positioning block 33 is arranged in the positioning groove 45 to limit the swing of the support rod 30, so as to prevent the support rod 30 from being turned without the steering block 42; After the pin 41 is inserted into the locking groove 22 in step 4, the steering block 42 is rigidly fixed with the mounting seat 20, and then the positioning block 33 is arranged in the positioning groove 45 to limit the rotation of the support rod 30, so as to ensure that the lifting protruding block 32 does not deviate in the bearing state.

[0034] Specifically, the hoisting method further includes a lifting device dismounting step after hoisting is completed, and the specific steps are as follows: Step S6, after the product is positioned and fixed, the steering is unlocked: The pin 41 in the locking through hole 43 is pulled out, the steering block 42 is released from the constraint of the locking groove 22 of the mounting seat 20, the steering assembly 40 returns to the free state, and the angle locking of the support rod 30 is released; Step S7, switching to the folding configuration: The steering block 42 is rotated, the non-coaxial design of the mounting through hole 23 and the mounting circular sleeve 21 is used, the lifting protruding block 32 is swung to be completely overlapped with the bottom end face of the mounting circular sleeve 21, and the folding configuration is returned; Step S8, lifting device withdrawal: The support rod 30 and the lifting protruding block 32 in the folding configuration are withdrawn from the product through hole along the vertical direction, and the separation of the lifting device and the product is completed; And during the dismounting process, the symmetrical structure at both ends of the cross beam 10 always maintains force balance, so as to avoid the lifting device shaking and the product being damaged by collision when being withdrawn.

[0035] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A lifting device for annular through-hole products, characterized in that: include: A crossbeam (10); the crossbeam (10) is provided with lifting lugs (11) for connecting lifting equipment; Two sets of support rods (30); the two sets of support rods (30) are respectively set at both ends of the crossbeam (10); the bottom end of the support rod (30) is provided with a hoisting protrusion (32); Two sets of steering assemblies (40); the two sets of steering assemblies (40) are matched with the two sets of support rods (30); the steering assemblies (40) are connected to the crossbeam (10); the steering assemblies (40) have a locked state and a free state; When the steering assembly (40) is in a free state, the support rod (30) swings, causing the lifting protrusion (32) to switch between a retracted configuration that can be vertically inserted into the product through hole and a lifting configuration that can lift the product through hole. When the steering assembly (40) is in the locked state, the support rod (30) is fixed, so that the lifting protrusion (32) remains in the folded configuration or the lifting configuration.

2. The lifting device for annular through-hole products according to claim 1, characterized in that: Two sets of mounting seats (20) are symmetrically arranged on the crossbeam (10), and the mounting seats (20) are connected to the crossbeam (10) by bolts; The mounting base (20) is provided with a mounting sleeve (21), the mounting sleeve (21) is provided with a mounting through hole (23), and the support rod (30) is rotatably disposed in the mounting through hole (23).

3. A lifting device for annular through-hole products according to claim 2, characterized in that: The crossbeam (10) has two sets of crossbeam mounting holes (12), and the two sets of mounting sleeves (21) are set in the two sets of crossbeam mounting holes (12); The mounting through hole (23) is not coaxially set with the mounting sleeve (21), so that the lifting protrusion (32) can switch between overlapping and not overlapping with the bottom surface of the mounting sleeve (21); The lifting protrusion (32) coincides with the bottom end face of the mounting sleeve (21), so that the lifting protrusion (32) forms a converging structure that can be vertically inserted into the product through hole; The lifting protrusion (32) does not coincide with the bottom surface of the mounting sleeve (21), so that the lifting protrusion (32) forms a lifting configuration that can lift the through hole of the product.

4. A lifting device for annular through-hole products according to claim 3, characterized in that: The steering assembly (40) includes a steering block (42), the steering block (42) is provided with a steering through hole (44), and the steering through hole (44) is coaxially arranged with the mounting through hole (23); The support rod (30) is disposed in the steering through hole (44), and a nut (31) with threaded connection is disposed on the support rod (30). The nut (31) is connected to the support rod (30), so that the support rod (30) is positioned in the steering through hole (44) and the mounting through hole (23).

5. A lifting device for annular through-hole products according to claim 4, characterized in that: The steering through hole (44) is provided with a positioning groove (45), and the support rod (30) is provided with a positioning block (33). The support rod (30) is provided in the steering through hole (44), so that the positioning block (33) is placed in the positioning groove (45).

6. A lifting device for annular through-hole products according to claim 5, characterized in that: The steering block (42) is provided with a locking through hole (43), and the locking through hole (43) and the steering through hole (44) are symmetrically arranged on the steering block (42); A pin (41) is provided in the locking through hole (43), and the pin (41) contacts the mounting base (20) so that the steering block (42) is locked on the mounting base (20).

7. A lifting device for annular through-hole products according to claim 6, characterized in that: The mounting base (20) is provided with two sets of locking slots (22), the two sets of locking slots (22) are symmetrically arranged, and the mounting through hole (23) is arranged between the two sets of locking slots (22); The pin (41) is placed in the locking groove (22) so that the steering block (42) is locked on the mounting base (20).

8. A lifting method for a lifting device for annular through-hole products according to any one of claims 1-7, characterized in that: Includes the following steps: Step S1: Unlock the spreader steering: Pull out the pin (41) in the locking through hole (43) on the steering block (42) so that the steering block (42) is disengaged from the locking groove (22) on the mounting base (20) and the steering assembly (40) switches to the free state; since the positioning block (33) is placed in the positioning groove (45), the support rod (30) can change its state as the steering block (42) rotates; Step S2: Switch to the collapsible configuration: Based on the non-coaxial design of the mounting sleeve (21) of the mounting base (20) on the crossbeam (10) and the mounting through hole (23) of the support rod (30) rotating, the steering blocks (42) at both ends of the crossbeam (10) are rotated, which drives the support rod (30) to rotate, so that the lifting protrusion (32) at the bottom of the support rod (30) swings with the support rod (30) until it completely overlaps with the bottom surface of the mounting sleeve (21), forming a converging configuration that matches the inner diameter of the through hole of the product, thus avoiding interference between the lifting protrusion (32) and the inner wall of the through hole; Step S3: Connecting the lifting device with the product: The lifting protrusion (32) and support rod (30) in the retracted configuration are precisely placed vertically into the through hole of the annular through hole product until the lifting protrusion (32) completely protrudes from the lower end face of the through hole of the product, ensuring that the lifting protrusion (32) has the space to switch to the lifting configuration. Step S4: Switch the hoisting configuration and lock it: Reverse rotation of the steering block (42) causes the support rod (30) to rotate in the opposite direction, causing the lifting protrusion (32) to swing with the support rod (30) until it is completely displaced from the bottom surface of the mounting sleeve (21), forming a lifting configuration that can support the lower surface of the product through hole; at this time, insert the pin (41) to make it snap into the corresponding locking groove (22) of the mounting seat (20), and the steering assembly (40) switches to the locked state, so as to fix the position of the support rod (30) to maintain the lifting configuration; Step S5: Perform hoisting operations. Securely connect the lifting equipment to the lifting lugs (11) on the crossbeam (10), start the lifting equipment, and lift the product smoothly through the balanced force structure formed by the support rods (30) symmetrically arranged at both ends of the crossbeam (10) and the lifting protrusions (32), so as to avoid the product shifting or falling off during the lifting process.

9. The lifting method of a lifting device for annular through-hole products according to claim 1, characterized in that: The specific operations of "switching the steering component (40) to the free state" in step 8 and "switching the steering component (40) to the locked state" in step 4 also include: The steering block (42) is fitted with the support rod (30) through the steering through hole (44), and the steering through hole (44) and the mounting through hole (23) on the mounting base (20) for mounting the round sleeve (21) are coaxially arranged. The support rod (30) is positioned in the steering through hole (44) and the mounting through hole (23) by the threaded nut (31) to prevent the support rod (30) from moving along the axial direction. After the pin (41) is pulled out in step 1, the support rod (30) can rotate synchronously with the steering block (42). The positioning block (33) is placed in the positioning groove (45) to provide a limit for the swing of the support rod (30) and prevent the support rod (30) from turning without turning with the steering block (42). In step 4, after the pin (41) is inserted into the locking groove (22), the steering block (42) and the mounting base (20) are rigidly fixed. Then, the positioning block (33) is placed in the positioning groove (45) to restrict the rotation of the support rod (30) and ensure that the lifting protrusion (32) does not shift in configuration under load.

10. A method for lifting a lifting device for annular through-hole products according to claim 8, characterized in that: The hoisting method also includes a dismantling step of the lifting equipment after hoisting is completed, as follows: Step S6: After the product is positioned and fixed, unlock the steering mechanism. Pull out the pin (41) in the locking through hole (43) to release the steering block (42) from the locking groove (22) of the mounting base (20), and the steering assembly (40) will return to a free state, releasing the angle lock on the support rod (30); Step S7: Switch to the collapsible configuration: Rotate the steering block (42) and use the non-coaxial design of the mounting through hole (23) and the mounting sleeve (21) to make the lifting protrusion (32) swing to completely coincide with the bottom surface of the mounting sleeve (21) and return to the folded configuration; Step S8, Removal of the lifting equipment: The support rod (30) and the lifting protrusion (32) in the retracted configuration are removed vertically from the product through hole to complete the separation of the lifting device from the product; Furthermore, during the disassembly process, the symmetrical structure at both ends of the crossbeam (10) always maintains a force balance, avoiding the shaking of the lifting device and collision damage to the product during removal.

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