A hoisting device for forgings

Abstract

This utility model discloses a forging hoisting device, belonging to the field of forging hoisting. It includes a clamping assembly comprising two sets of opposing clamping parts, each clamping part including two sets of opposing clamping seats, the inner wall of which is provided with an adjustment part; a rotating assembly including support parts disposed on both sides of the two sets of clamping parts, each support part including an angle plate disposed on one side of the clamping seat, a horizontally disposed rotating shaft passing through a bearing on the angle plate, the rotating shaft being provided with a locking part for locking the two sets of clamping parts after rotation; and a clamping assembly disposed at the upper end of the clamping assembly. This forging hoisting device, through the layout of concave clamping seats and fixed seats, and with the adjustment part driving the clamping plate to adapt to the square forging, increases the contact area and prevents damage; the rotating assembly adjusts the posture to maintain force balance; and the clamping assembly, relying on a bidirectional lead screw to adapt to the size, can stably clamp round and square forgings, reducing the risk of slippage and meeting diverse hoisting needs.

Description

Technical Field

[0001] This utility model relates to the field of forging hoisting technology, and in particular to a hoisting device for forgings. Background Technology

[0002] In modern industrial production, forgings are workpieces or blanks obtained by forging and deforming metal billets, and are widely used in many fields such as shipbuilding, nuclear power, and mining machinery. The equipment in these fields often requires a large number of large forgings. During the production, transportation, inspection, or maintenance of forgings, various lifting equipment is needed to lift the forgings and change their position. Therefore, lifting devices play a crucial role.

[0003] For example, a lifting device for planetary gear forgings, disclosed in CN222225738U, includes a frame, a lifting base, a lifting ring, a slide groove, two movable seats, two connecting arms, a fixed plate, and a rotating structure. It can clamp and fix planetary gear forgings of different sizes and thicknesses, making the lifting of planetary gear forgings more convenient and improving lifting efficiency.

[0004] The above-mentioned solution has limitations in its application. Its clamping structure is designed around circular forgings, and the arc-shaped clamping surface formed by the fixing plate and connecting arm can only fit the outer contour of the circle. When dealing with square forgings commonly found in industrial production, the arc-shaped clamping surface cannot effectively contact the planar sides of the square forging; it can only contact the edges of the square forging through the edge of the clamping surface. This not only reduces the contact area but also concentrates the force at the edges, easily causing surface damage to the forging. Furthermore, it is difficult to provide stable clamping, and the square forging is prone to tilting and slipping during lifting, posing a safety hazard. It is also difficult to meet the lifting needs of forgings of various shapes. Therefore, a forging lifting device needs to be designed to solve the above-mentioned defects.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0006] This utility model provides a hoisting device for forgings to solve the problem that while the clamping structure is adapted to round forgings, it is difficult to meet the hoisting needs of common square forgings in industry due to their small contact area, concentrated stress, and susceptibility to damage. Furthermore, these forgings are prone to tilting and slipping during hoisting.

[0007] This utility model embodiment adopts the following technical solution: a hoisting device for forgings. It mainly includes a clamping assembly, which includes two sets of oppositely arranged clamping parts. Each clamping part includes two sets of oppositely arranged clamping seats. The clamping seats have a concave structure, and a fixing seat is fixed at the center of each clamping seat. An adjusting part is provided on the inner wall of each clamping seat. A rotating assembly is disposed on both sides of the two sets of clamping parts. The rotating assembly includes support parts disposed on both sides of the two sets of clamping parts. Each support part includes an angle plate disposed on one side of the clamping seat. A horizontally arranged rotating shaft is passed through the angle plate by a bearing. One end of the rotating shaft is connected to the clamping seat. A locking part is provided on the rotating shaft to lock the two sets of clamping parts after rotation. A clamping assembly is disposed at the upper end of the clamping assembly. The clamping assembly is used to move the two sets of clamping parts closer together or further apart.

[0008] Furthermore, the adjustment unit includes cylinders fixed at both ends of the inner wall of the clamp seat, the telescopic ends of the two sets of cylinders are respectively connected to both sides of the fixed seat, and multiple sets of guide rods are fixedly connected to both ends of the inner wall of the clamp seat and both sides of the fixed seat. The cylinders are movably sleeved on the guide rods, and right-angle clamps are fixed to the sides of the cylinders.

[0009] Furthermore, a buckle plate is fixed on the right-angle clamp, and a clamp plate is fixed on the buckle plate by a fixing angle plate. The fixing angle plate is fixedly connected to the clamp plate and both sides of the right-angle clamp by fasteners. A friction surface is provided at the contact position between the clamp plate and the tubular forging. Arc grooves are opened on the opposite sides of the four sets of clamp plates.

[0010] Furthermore, the locking part includes two sets of connecting sleeves movably sleeved on the rotating shaft. The connecting sleeves are connected and fixed to each other by a protrusion. A side plate is fixed on the protrusion. A ratchet is connected to the side plate by a spring. A ratchet is fixedly sleeved on the rotating shaft between the two sets of connecting sleeves. The ratchet meshes with the ratchet.

[0011] Furthermore, the ratchet has a number of tooth blocks, and the distance between the two sets of tooth blocks is [degree].

[0012] Furthermore, a rotating wheel is fixed to one end of the rotating shaft.

[0013] Furthermore, the first rotating wheel is equipped with a vertically positioned pointer, which is vertically upward by default.

[0014] Furthermore, the clamping assembly includes a fixed beam disposed on the upper end of the clamping assembly, a frame is fixedly fixed through the fixed beam, a movable part is disposed on the frame, the movable part includes a concave frame fixed at the center of the frame, the concave frame passes through the fixed beam and is parallel to the frame, a bidirectional lead screw is disposed through the concave frame and bearing, the bidirectional lead screw has two helical grooves with opposite helical directions, a sliding seat is threadedly connected to the two helical grooves, the sliding seat is movably sleeved on the frame, and a rotating wheel is fixed to one end of the bidirectional lead screw.

[0015] Furthermore, a connecting arm is fixed to the bottom surface of the sliding seat, and a tubular connecting sleeve is fixed to one end of the connecting arm. The connecting sleeve is fixed through the corner plate. A cap is fixedly sleeved through the protrusion. The cap has an inner groove on its upper surface. The cap is adapted to be fixedly sleeved to one end of the connecting sleeve through the inner groove. There is a gap between the inner ring of the cap and the ratchet and ratchet teeth.

[0016] The protrusion extends into the connecting bushing, and a horizontally arranged double-ended screw passes through the side of the connecting bushing. The double-ended screw passes through the connecting bushing and the protrusion in sequence, and locking nuts are threaded to both ends of the double-ended screw. A support seat is movably sleeved on the rotating shaft, and the support seat is fixedly connected to the corner plate.

[0017] Furthermore, protective covers are fixed to both sides of the fixed beam, and the protective covers cover the frame.

[0018] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0019] A lifting device for forgings, through the layout of a concave clamp seat and a centrally fixed seat in the clamping assembly, and in conjunction with the inner wall adjustment part, can flexibly adjust the position of the clamping structure without relying on a fixed arc-shaped clamping surface. The adjustment part can drive the right-angle clamping plate or a suitable square clamping component to fully contact the flat side of the forging, increasing the contact area to avoid force concentration at the edges and corners and prevent damage to the forging surface. The rotating components on both sides, through the corner plates, rotating shafts and locking parts, can adjust the posture of the clamping part to ensure force balance when clamping the forging and avoid tilting during lifting. The upper clamping assembly drives the two sets of clamping parts to move closer or further apart by means of a bidirectional screw, which can adapt to the clamping requirements of forgings of different sizes, achieve stable clamping of forgings of various shapes such as round and square, reduce the risk of slippage during lifting, and meet the diverse forging lifting needs in industrial production. Attached Figure Description

[0020] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0021] In the attached diagram:

[0022] Figure 1 This is an overall schematic diagram of a hoisting device for a forging according to this application;

[0023] Figure 2 for Figure 1 A schematic diagram of a partial structure;

[0024] Figure 3 for Figure 2 Enlarged view of point A;

[0025] Figure 4 for Figure 2 A schematic diagram of the bottom structure;

[0026] Figure 5 for Figure 4 Enlarged view of point C;

[0027] Figure 6 for Figure 1 A schematic diagram of the bottom structure;

[0028] Figure 7 for Figure 6 Enlarged view of point B;

[0029] Figure label:

[0030] 1. Fixture assembly; 11. Fixture base; 12. Fixed base; 13. Cylinder; 14. Guide rod; 15. Fixture plate; 151. Arc groove; 16. Right angle clamp; 17. Buckle plate; 18. Fixed angle plate; 19. Angle plate piece; 2. Rotating assembly; 21. Rotating shaft; 22. Support base; 23. Rotating wheel one; 24. Ratchet; 25. Connecting sleeve; 251. Protrusion; 26. Double-ended screw; 27. Locking nut; 28. Side plate; 29. ​​Spring; 210. Ratchet tooth; 211. Cap; 3. Clamping assembly; 31. Fixed beam; 32. Frame; 33. Concave frame; 34. Two-way lead screw; 35. Sliding seat; 37. Rotating wheel two; 38. Connecting arm; 39. Connecting bushing. Detailed Implementation

[0031] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0032] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0033] Reference Figures 1-2As shown in the figure, the present invention provides a hoisting device for forgings, including a clamp assembly 1. The clamp assembly 1 includes two sets of clamping parts arranged opposite to each other. Each clamping part includes two sets of clamping seats 11 arranged opposite to each other. The clamping seats 11 have a concave structure, and a fixing seat 12 is fixed at the center of the clamping seat 11. An adjustment part is provided on the inner wall of the clamping seat 11. The adjustment part is used to adjust the spacing according to the size of the forging. The adjustment part includes cylinders 13 fixed at both ends of the inner wall of the clamping seat 11. The telescopic ends of the two sets of cylinders 13 are respectively connected to the two sides of the fixing seat 12.

[0034] Multiple sets of guide rods 14 are fixedly connected to both ends of the inner wall of the clamping seat 11 and the two sides of the fixed seat 12. The cylinder 13 is movably sleeved on the guide rods 14. The guide rods 14 are used to provide movement guidance for the cylinder 13 to avoid deviation. Right angle clamping plates 16 are fixed on the side of the cylinder 13. The two sets of clamping parts can adapt to plate forgings of different sizes through the four sets of right angle clamping plates 16. At the same time, buckle plates 17 are fixed on the right angle clamping plates 16, and clamping plates 15 are fixed on the buckle plates 17 through the fixing angle plates 18. It should be noted that when it is necessary to clamp the plate forging, the right angle clamping plates 16 are in the upper position and the clamping plates 15 are in the lower position. At this time, the clamping plates 15 can support the plate forging. In actual production, for example, when processing metal plate forgings, the clamping plates 15 can support the plate and the right angle clamping plates 16 clamp from the side.

[0035] Reference Figures 2-3 As shown, the fixed angle plate 18 is fixedly connected to both sides of the clamping plate 15 and the right-angle clamping plate 16 by fasteners to facilitate subsequent disassembly and maintenance. In the actual production of tubular forgings, the tubular forgings need to be stably clamped to carry out subsequent processes. The four sets of clamping plates 15 are used to clamp the vertical tubular forgings. In order to enhance the stability of clamping and prevent the tubular forgings from sliding during processing, friction surfaces are provided at the contact positions between the clamping plates 15 and the tubular forgings. At the same time, arc-shaped grooves 151 are provided on the opposite sides of the four sets of clamping plates 15. When the four sets of clamping plates 15 cooperate with each other, the four sets of arc-shaped grooves 151 can form a circular structure, which is suitable for fixing and clamping the disc-mounted forgings, so that the forgings remain stable in subsequent processing and are easy to operate.

[0036] Reference Figures 4-7As shown, rotating components 2 are provided on both sides of the two sets of clamping parts. These rotating components 2 are used to drive the two sets of clamping parts to achieve a flipping action. Each rotating component 2 includes a support portion provided on both sides of the two sets of clamping parts. The support portion includes a corner plate 19 provided on one side of the clamping base 11, and a horizontally arranged rotating shaft 21 is pierced through the corner plate 19 by a bearing. One end of the rotating shaft 21 is connected to the clamping base 11, and a locking portion is fixed on the rotating shaft 21. The locking portion includes two sets of connecting sleeves movably sleeved on the rotating shaft 21. 25. The connecting sleeves 25 are connected and fixed by protrusions 251, and a side plate 28 is fixed on the protrusions 251. A ratchet 210 is connected to the side plate 28 by a spring 29. At the same time, a ratchet 24 is fixedly sleeved on the rotating shaft 21 between the two sets of connecting sleeves 25. The ratchet 24 meshes with the ratchet 210, so that after the rotating shaft 21 rotates to a suitable angle, it is locked by the meshing of the ratchet 24 and the ratchet 210, preventing the rotating shaft 21 from rotating accidentally during the processing and ensuring the stability after rotation.

[0037] It should be noted that the ratchet 24 has 12 tooth blocks, with the two sets of tooth blocks spaced 30 degrees apart, so that the rotation angle of the rotating shaft 21 can be controlled in 30-degree increments. In actual processing, when clamping forgings of different shapes, the position of the clamping plate 15 and the right-angle clamping plate 16 can be switched by rotating the clamping part 180 degrees to achieve clamping of forgings of different shapes.

[0038] Meanwhile, a rotating wheel 23 is fixed at one end of the rotating shaft 21. The rotating wheel 23 allows the operator to manually drive the rotating shaft 21 to rotate. A vertically positioned pointer (not shown in the figure) is set on the rotating wheel 23. The pointer is set vertically upward by default and is used to indicate the rotation angle of the rotating wheel 23. The operator can check the rotation angle of the rotating wheel 23 through the pointer, thereby accurately controlling the rotation range of the rotating shaft 21 to meet different clamping requirements.

[0039] Reference Figures 1-2As shown, a clamping assembly 3 is provided at the upper end of the clamping assembly 1. The clamping assembly 3 is used to bring the two sets of clamping parts closer together or further apart to clamp and fix the forging. The clamping assembly 3 includes a fixed beam 31 provided at the upper end of the clamping assembly 1, and a frame 32 is fixedly fixed through the fixed beam 31. The frame 32 is provided with a moving part, which is used to support the moving part. The moving part includes a concave frame 33 fixed at the center of the frame 32. The concave frame 33 passes through the fixed beam 31 and is parallel to the frame 32. A double-acting screw 34 is provided with a bearing inside the concave frame 33. The double-acting screw 34 has two helical grooves with opposite helical directions. A sliding seat 35 is threadedly connected to the two helical grooves. The sliding seat 35 is movably sleeved on the frame 32. A rotating wheel 37 is fixed at one end of the double-acting screw 34. The operator can drive the double-acting screw 34 to rotate by rotating the rotating wheel 37, thereby controlling the movement of the sliding seat 35.

[0040] In actual production, the workshop environment may contain iron filings, dust, etc. In order to protect the bidirectional lead screw 34, protective covers can be fixed on both sides of the fixed beam 31. These protective covers are placed on the frame 32 and provide a certain degree of protection for the bidirectional lead screw 34, preventing debris from affecting the normal operation of the lead screw and extending the service life of the equipment.

[0041] Furthermore, a connecting arm 38 is fixed to the bottom surface of the sliding seat 35. A tubular connecting sleeve 39 is fixed to one end of the connecting arm 38. The connecting sleeve 39 is fixed through the corner plate 19 to achieve connection with the lower component. At the same time, a cap 211 is fixedly sleeved through the protrusion 251. The upper surface of the cap 211 has an inner groove, and the cap 211 is suitable for being fixedly sleeved on one end of the connecting sleeve 39 through the inner groove. The inner ring of the cap 211 has a gap between it and the ratchet 24 and the ratchet tooth 210 so that the ratchet 24 can be used normally and will not be interfered with by the presence of the cap 211.

[0042] Meanwhile, the protrusion 251 extends into the connecting sleeve 39, and a horizontally arranged double-ended screw 26 passes through the side of the connecting sleeve 39. The double-ended screw 26 passes through the connecting sleeve 39 and the protrusion 251 in sequence, and locking nuts 27 are threaded to both ends of the double-ended screw 26. By tightening the locking nuts 27, the connecting sleeve 39 and the protrusion 251 can be fixedly connected to ensure the stability of the connection. A support seat 22 is movably sleeved on the rotating shaft 21. The support seat 22 is fixedly connected to the angle plate 19 and is used to support the rotating shaft 21.

[0043] Working principle: When clamping forgings of different shapes, the device can switch the clamp posture through the rotating component 2 and fix it in conjunction with the adjustment part. When clamping plate-shaped forgings such as metal sheets, first operate the rotating component 2. The operator rotates the first rotating wheel 23, which drives the rotating shaft 21 connected to the clamp seat 11 to rotate. The pointer on the first rotating wheel 23 confirms the flip angle, so that the right angle clamping plate 16 is at the upper end and the clamping plate 15 is at the lower end. Then, the ratchet 24 on the rotating shaft 21 engages and locks with the ratchet tooth 210 to prevent the clamping part from rotating accidentally.

[0044] Next, the cylinder 13 of the inner wall adjustment part of the clamp seat 11 is activated. The telescopic end of the cylinder 13 moves smoothly along the guide rod 14, driving the right-angle clamping plate 16 on the side to move closer to the plate forging. The four sets of right-angle clamping plates 16 clamp the forging from both sides simultaneously. At the same time, the clamping plate 15 at the lower end supports the bottom of the forging, forming a double fixation of side clamping and bottom support, which is suitable for plate forgings of different widths. If clamping vertical tubular or disc forgings, the clamping part is rotated 180 degrees by the rotating component 2, so that the clamping plate 15 becomes the clamping master. The cylinder 13 of the adjustment part drives the clamping plate 15 to move. The arc grooves 151 on the opposite sides of the four sets of clamping plates 15 are spliced ​​to form a circular structure that fits the forging, wrapping the forging. The friction surface on the contact surface of the clamping plate 15 can increase the friction force, prevent the forging from sliding due to gravity, and ensure that the tubular forging is vertically stable and the disc forging is horizontally and firmly fixed.

[0045] When the size of the forging changes, the device can adjust the spacing and fix the forging through the adjusting part and the clamping assembly 3. The adjusting part in the clamping seat 11 directly adjusts the clamping range of the right-angle clamping plate 16 or the clamping plate 15 by extending and retracting the cylinder 13, adapting to the size fluctuations of the same type of forging. On the other hand, by operating the clamping assembly 3, the operator rotates the rotating wheel 37, driving the bidirectional lead screw 34 in the concave frame 33 to rotate. Since the two spiral grooves of the bidirectional lead screw 34 rotate in opposite directions, the two sets of sliding seats 35 connected to it move synchronously towards or away from each other along the frame 32. The sliding seats 35 drive the connecting bushing 39 to move through the connecting arm 38 on the bottom surface. The connecting bushing 39 and the protrusion 251 are fixed by the double-ended screw 26 and the locking nut 27, thereby pulling the two sets of clamping parts closer or further apart to achieve the clamping and fixing operation of the forging. During this process, the protective covers on both sides of the fixed beam 31 cover the frame 32 to prevent iron filings and dust in the workshop from adhering to the bidirectional lead screw 34, thus ensuring the smooth operation and service life of the lead screw.

[0046] Meanwhile, the fixed angle plate 18 connects the clamp plate 15 and the right-angle clamp plate 16 with fasteners, which not only ensures the connection strength but also facilitates subsequent maintenance. When the clamp plate 15 wears due to long-term clamping, it can be quickly disassembled and replaced. The support seat 22, which is movably sleeved on the rotating shaft 21, is fixed to the angle plate 19, providing radial support for the rotating shaft 21 and preventing the rotating shaft 21 from sagging due to gravity when it drives the clamp part to rotate. The cap 211 on the protrusion 251 is sleeved on one end of the connecting shaft sleeve 39 through the inner groove. This not only protects the connection part between the connecting shaft sleeve 39 and the protrusion 251, but also prevents the cap 211 from interfering with the meshing action of the locking structure due to the reserved gap between it and the ratchet 24 and ratchet 210, thus ensuring the normal operation of the locking function of the rotating component 2.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A hoisting device for a forging, characterized by: include The clamp assembly (1) includes two sets of clamping parts arranged opposite to each other. Each clamping part includes two sets of clamping seats (11) arranged opposite to each other. The clamping seats (11) have a concave structure. A fixing seat (12) is fixed at the center of the clamping seat (11). An adjustment part is provided on the inner wall of the clamping seat (11). A rotating assembly (2) is provided on both sides of two sets of clamping parts. The rotating assembly (2) includes a support part provided on both sides of the two sets of clamping parts. The support part includes an angle plate (19) provided on one side of the clamping seat (11). A horizontally arranged rotating shaft (21) is passed through the bearing on the angle plate (19). One end of the rotating shaft (21) is connected to the clamping seat (11). A locking part is provided on the rotating shaft (21) to lock the two sets of clamping parts after rotation. A clamping assembly (3) is disposed at the upper end of the clamping assembly (1), and the clamping assembly (3) is used to enable the two sets of clamping parts to move closer to each other or further apart.

2. A forging hoist as claimed in claim 1, wherein: The adjustment unit includes cylinders (13) fixed at both ends of the inner wall of the clamp seat (11). The telescopic ends of the two sets of cylinders (13) are respectively connected to both sides of the fixed seat (12). Multiple sets of guide rods (14) are fixedly connected to both ends of the inner wall of the clamp seat (11) and both sides of the fixed seat (12). The cylinders (13) are movably sleeved on the guide rods (14). A right-angle clamp (16) is fixed on the side of the cylinder (13).

3. A forging lifting device according to claim 2, wherein: A buckle plate (17) is fixed on the right-angle clamp plate (16), and a clamp plate (15) is fixed on the buckle plate (17) by a fixing angle plate (18). The fixing angle plate (18) is fixedly connected to the clamp plate (15) and the two sides of the right-angle clamp plate (16) by fasteners. A friction surface is provided at the contact position between the clamp plate (15) and the tubular forging. Arc grooves (151) are opened on the opposite sides of the four sets of clamp plates (15).

4. The hoisting device for forgings according to claim 1, characterized in that: The locking part includes two sets of connecting sleeves (25) movably sleeved on the rotating shaft (21). The connecting sleeves (25) are connected and fixed to each other by a protrusion (251). A side plate (28) is fixed on the protrusion (251). A ratchet (210) is connected to the side plate (28) by a spring (29). A ratchet (24) is fixedly sleeved on the rotating shaft (21) between the two sets of connecting sleeves (25). The ratchet (24) meshes with the ratchet (210).

5. A forging lifting device according to claim 4, wherein: The ratchet (24) has 12 tooth blocks, and the distance between the two sets of tooth blocks is 30 degrees.

6. A forging hoist as defined in claim 4 wherein: One end of the rotating shaft (21) is fixed with a rotating wheel (23).

7. A forging lifting device according to claim 6, characterised in that: The rotating wheel (23) is equipped with a vertically positioned pointer, which is vertically upward by default.

8. A device for lifting a forging according to claim 4, wherein: The clamping assembly (3) includes a fixed beam (31) disposed on the upper end of the clamping assembly (1). A frame (32) is fixedly fixed through the fixed beam (31). A movable part is disposed on the frame (32). The movable part includes a concave frame (33) fixed at the center of the frame (32). The concave frame (33) passes through the fixed beam (31) and is parallel to the frame (32). A bidirectional lead screw (34) is disposed inside the concave frame (33) with a bearing. The bidirectional lead screw (34) has two helical grooves with opposite helical directions. A sliding seat (35) is threaded onto the two helical grooves. The sliding seat (35) is movably sleeved on the frame (32). A rotating wheel (37) is fixed at one end of the bidirectional lead screw (34).

9. A forging lifting device according to claim 8, characterised in that: The bottom surface of the sliding seat (35) is fixed with a connecting arm (38), and one end of the connecting arm (38) is fixed with a tubular connecting bushing (39). The connecting bushing (39) is fixed through the corner plate (19). A cap (211) is fixedly sleeved through the protrusion (251). The upper surface of the cap (211) has an inner groove. The cap (211) is adapted to be fixedly sleeved on one end of the connecting bushing (39) through the inner groove. There is a gap between the inner ring of the cap (211) and the ratchet (24) and the ratchet tooth (210). The protrusion (251) extends into the connecting bushing (39). A horizontally arranged double-headed screw (26) passes through the side of the connecting bushing (39). The double-headed screw (26) passes through the connecting bushing (39) and the protrusion (251) in sequence. Locking nuts (27) are threaded to both ends of the double-headed screw (26). A support seat (22) is movably sleeved on the rotating shaft (21). The support seat (22) is fixedly connected to the corner plate (19).

10. A forging lifting device according to claim 9, wherein: Protective covers are fixed on both sides of the fixed beam (31), and the protective covers are placed on the frame (32).

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