Casting lifting device convenient to adjust

Abstract

The invention relates to the technical field of casting, in particular to a casting lifting device convenient to adjust, which mainly comprises a gantry bracket, avoiding grooves are formed in two side walls of the gantry bracket, a transmission screw rod is arranged in one group of avoiding grooves, a guide block is screwed on the transmission screw rod, and the guide block is connected with a lifting rod; the clamping assembly is arranged below the lifting rod and comprises a plurality of groups of clamping blocks which are close to or far away from each other; the adjusting assembly is arranged on the side walls of the sides, close to each other, of the clamping blocks, and the adjusting assembly comprises a plurality of sets of push plates elastically connected with the side walls of the clamping blocks; according to the crankshaft clamping device, the multiple sets of clamping blocks are driven to get close to one another through cooperation of the rotationally-arranged adjusting plate and the through groove to clamp a crankshaft, in the clamping process, the elastically-arranged push plates make contact with the surface of the crankshaft, the end of each push plate is made to form the shape matched with the surface of the crankshaft, and therefore it is guaranteed that all the clamping blocks can make contact with the surface of the crankshaft.

Description

Technical Field

[0001] The present invention relates to the technical field of casting, and specifically relates to a lifting device for casting that is convenient to adjust. Background Art

[0002] High-strength and tough die-cast aluminum alloy can be used for casting the crankshaft of a small engine; during the process of metallurgical casting, it is often necessary to lift some metal materials, and at this time, a lifting device for metallurgical casting is required. In the prior art, Chinese Invention Patent Publication No. CN108483266A discloses a lifting device for metallurgical casting that is convenient to adjust, including a bottom block. A moving box is placed above the bottom block. The middle of the inner top wall of the moving box is fixedly connected with an electric hydraulic push rod. The middle of the bottom surface of the moving box is fixedly embedded with a first limiting tube. The telescopic end of the electric hydraulic push rod passes through the first limiting tube and extends below the moving box. The telescopic end of the electric hydraulic push rod is fixedly connected with the middle of the upper surface of the bottom block; this lifting device for metallurgical casting that is convenient to adjust can better drive the moving box to adjust the height through the operation of the electric hydraulic push rod, thereby adjusting the lifting height of the device. It can better drive the top plate to rotate through the operation of the fixed box, thereby adjusting the lifting angle of the device, improving the adjustability of the device, lifting the metal material, and can better pull out the moving rod to stabilize the device. In the above technology, the fixing block is controlled by the bottom block to lift the metal material. However, when casting a crankshaft, due to the irregular shape of the crankshaft, when the fixing block clamps the crankshaft, the fixing block may not be able to contact the crankshaft, resulting in an unstable clamping situation of the fixing block on the crankshaft. Summary of the Invention

[0003] The purpose of the present invention is to provide a lifting device for casting that is convenient to adjust, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A lifting device for casting that is convenient to adjust, including: A gantry bracket, wherein through grooves are respectively opened on both side walls inside the gantry bracket. A transmission lead screw is rotatably arranged inside one of the through grooves. And a lifting rod is slidably arranged inside the gantry bracket corresponding to the positions of the two through grooves. Both ends of the lifting rod are provided with guide blocks. A fourth through hole is opened on one of the guide blocks corresponding to the position of the corresponding transmission lead screw. The transmission lead screw passes through the fourth through hole and is screwed with the lifting rod through the fourth through hole; A clamping assembly, arranged below the lifting rod, for clamping a casting. The clamping assembly includes a plurality of clamping blocks that approach or move away from each other; The adjusting component is arranged on the side walls of the clamping blocks close to each other, and the adjusting component includes multiple groups of push plates elastically connected to the side walls of the clamping blocks.

[0005] Preferably, a first motor is arranged at the end position of the driving lead screw corresponding to the upper end of the gantry bracket, and the output end of the first motor penetrates through the top of the gantry bracket and is connected to the end of the driving lead screw; Through the cooperation of the driving lead screw and the guiding block, the lifting rod drives the lifting rod to move up and down inside the gantry bracket.

[0006] Preferably, the clamping component further includes a connecting block installed at the central position of the lower end of the lifting rod. A sunken groove is formed inside the connecting block, and an adjusting plate is rotatably arranged inside the sunken groove; An arc-shaped groove is formed on the side wall of the adjusting plate away from the lifting rod. Multiple groups of arc-shaped grooves are formed, and the multiple groups of arc-shaped grooves are evenly spaced in a circumferential state.

[0007] Preferably, multiple groups of through grooves are formed on the side wall of the connecting block corresponding to the positions of the arc-shaped grooves. The through grooves penetrate through the side wall of the connecting block and communicate with the arc-shaped grooves; A connecting rod is inserted into each through groove, and the end of each connecting rod passes through the corresponding through groove and is inserted into the corresponding arc-shaped groove.

[0008] Preferably, a limiting groove is formed on the side wall of each through groove corresponding to the position of the corresponding connecting rod. A limiting block is slidably arranged inside each limiting groove, and the outer surfaces of the limiting blocks are connected to the corresponding connecting rods.

[0009] Preferably, a groove is formed on the other side wall of the adjusting plate. A first transmission tooth groove is formed on the inner side wall of the groove. A first transmission gear is rotatably arranged inside the groove corresponding to the position of the first transmission tooth groove, and the first transmission gear meshes with the first transmission tooth groove; A second motor is installed on the inner side wall of the sunken groove corresponding to the position of the first transmission gear, and the output end of the second motor is connected to the side wall of the first transmission gear.

[0010] Preferably, one end of each connecting rod away from the connecting block is connected to a clamping block. Through the rotation of the adjusting plate and the cooperation of the through grooves, the clamping blocks approach or move away from each other.

[0011] Preferably, a plurality of sets of receiving grooves are provided at intervals on the side walls of the clamping blocks close to each other. A push plate is inserted into each of the receiving grooves, and a first return spring is provided between the end of each push plate and the inner wall of the corresponding receiving groove.

[0012] Preferably, a plurality of sets of second through holes are provided at intervals on the side walls of the push plates. A first abutting rod is slidably arranged in each of the second through holes; A clamping block is provided on the outer surface of each of the second through holes. A clamping groove is provided at a position corresponding to the clamping block on the inner side wall of each of the second through holes. Each of the clamping blocks is slidably arranged in the corresponding clamping groove, and a second return spring is provided between the side wall of each of the clamping blocks and the side wall of the corresponding clamping groove; A third through hole is provided at a position corresponding to one of the first abutting rods between two adjacent sets of the receiving grooves. A second abutting rod is slidably arranged in the third through hole, and the diameter of the second abutting rod is the same as that of the first abutting rod.

[0013] Preferably, a first through hole is provided on the side wall of the clamping block at a position corresponding to one of the first abutting rods on each of the push plates on the side. An insertion rod is inserted into each of the first through holes; An adjusting block is provided on one side of each of the clamping blocks at a position corresponding to the end of each of the insertion rods. Each of the adjusting blocks is connected to the end of the corresponding insertion rod; One side of the top of the adjusting block is provided with a toggle lever in an inverted "L" shape. A guide ring is installed on the outer surface of the corresponding connecting rod at a position corresponding to the toggle lever. One end of the toggle lever is inserted into the guide ring; A second transmission tooth groove is provided on the side wall of the toggle lever at a position corresponding to the guide ring. A second transmission gear is rotatably arranged in the guide ring at a position corresponding to the second transmission tooth groove. A third motor is installed at the bottom of the guide ring at a position corresponding to the second transmission gear. The output end of the third motor penetrates through the bottom of the guide ring and is connected to the second transmission gear.

[0014] Compared with the prior art, the beneficial effects of the present invention are: Through the cooperation of the rotatably arranged adjusting plate and the through groove, the present invention drives a plurality of clamping blocks to approach each other to clamp the crankshaft. During the clamping process, a plurality of elastically arranged push plates are driven to contact the surface of the crankshaft. At the same time, a part of the elastically arranged push plates are abutted into the receiving grooves by the surface of the crankshaft. When each of the push plates in contact with the crankshaft is abutted into the receiving grooves by the surface of the crankshaft, the ends of each of the push plates form a shape adapted to the surface of the crankshaft, so as to ensure that each clamping block can contact the surface of the crankshaft, facilitating the clamping of the crankshaft; Start the third motor. The third motor drives the lever to move to one side through the second transmission gear. When the lever moves, it pushes the adjusting block to one side, and the adjusting block then drives the inserting rod to move. During the movement of the inserting rod, it abuts against the adjacent first abutting rod, and the first abutting rod is inserted into the adjacent third through hole. At this time, the outermost push plate is fixed under the limitation of the first abutting rod. At the same time, when the second abutting rod is abutted by the outermost first abutting rod, the second abutting rod is inserted into the second through hole on the adjacent push plate, and the first abutting rod in the second group of second through holes is abutted into the next group of third through holes, thereby fixing each push plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a schematic diagram of the structural connection between the lifting rod and the connecting block of the present invention; Figure 3 is a schematic diagram of the structural connection between the connecting block and the clamping block of the present invention; Figure 4 is a schematic diagram of the structural connection between the connecting block and the adjusting plate of the present invention; Figure 5 is a schematic diagram of the internal structure of the connecting block of the present invention; Figure 6 is a schematic diagram of the structural connection between the adjusting plate and the second motor of the present invention; Figure 7 is a schematic diagram of the structural connection between the connecting block and the connecting rod of the present invention; Figure 8 is a sectional schematic diagram of the connection between the connecting block and the connecting rod of the present invention; Figure 9 is Figure 8 an enlarged schematic diagram of the structure at A in Figure 10 is a sectional schematic diagram of the connection between the lever and the guide ring of the present invention; Figure 11 is a sectional schematic diagram of the connection between the clamping block and the push plate of the present invention; Figure 12 is Figure 11 an enlarged schematic diagram of the structure at B in

[0016] In the figure: 1. Gantry support; 2. Lifting rod; 3. Connecting block; 4. Clamping block; 5. Transmission lead screw; 6. Relief groove; 7. First motor; 8. Guide block; 9. Fourth through hole; 10. Connecting rod; 11. Through groove; 12. Sunk groove; 13. Adjusting plate; 14. Arc groove; 15. Groove; 16. First transmission tooth groove; 17. First transmission gear; 18. Second motor; 19. Limit groove; 20. Limit block; 21. Poking rod; 22. Guide ring; 23. Third motor; 24. Pushing plate; 25. Adjusting block; 26. Second transmission gear; 27. Second transmission tooth groove; 28. Storage groove; 29. First return spring; 30. Plug rod; 31. First through hole; 32. First abutting rod; 33. Clamping groove; 34. Clamping block; 35. Second return spring; 36. Second through hole; 37. Second abutting rod; 38. Third through hole. Detailed implementation mode

[0017] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The following will describe the present application in detail with reference to the drawings and in combination with the embodiments.

[0018] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0019] As Figure 1-12 shown, the present application provides a casting lifting device that is easy to adjust, including: A gantry support 1, relief grooves 6 are provided on both side walls inside the gantry support 1. A transmission lead screw 5 is rotatably arranged inside one of the relief grooves 6. And a lifting rod 2 is slidably arranged inside the gantry support 1 corresponding to the positions of the two relief grooves 6. Guide blocks 8 are provided at both ends of the lifting rod 2. A fourth through hole 9 is provided in one of the guide blocks 8 corresponding to the position of the corresponding transmission lead screw 5. The transmission lead screw 5 passes through the fourth through hole 9 and is screwed with the lifting rod 2 through the fourth through hole 9; At the end position of the transmission lead screw 5 corresponding to the upper end of the gantry support 1, a first motor 7 is provided. The output end of the first motor 7 penetrates through the top of the gantry support 1 and is connected to the end of the transmission lead screw 5; In this embodiment: Start the first motor 7, the first motor 7 drives the transmission lead screw 5 to rotate. During the rotation of the transmission lead screw 5, the guide block 8 screwed with the transmission lead screw 5 drives the lifting rod 2 to move up and down inside the gantry support 1.

[0020] Specifically, asFigures 3-5 As shown in the figure, a lifting device for casting that is easy to adjust includes: a clamping assembly, which is arranged below the lifting rod 2 and is used for clamping the casting. The clamping assembly includes multiple groups of clamping blocks 4 that approach or move away from each other; The clamping assembly further includes a connecting block 3 installed at the central position of the lower end of the lifting rod 2. A sunken groove 12 is opened inside the connecting block 3, and an adjusting plate 13 is rotatably arranged inside the sunken groove 12; An arc-shaped groove 14 is opened on the side wall of the adjusting plate 13 away from the lifting rod 2. Multiple groups of arc-shaped grooves 14 are provided, and the multiple groups of arc-shaped grooves 14 are evenly spaced in a circumferential state; At the positions corresponding to the respective arc-shaped grooves 14 on the side wall of the connecting block 3, multiple groups of spaced-through grooves 11 are opened. The through grooves 11 penetrate the side wall of the connecting block 3 and communicate with the arc-shaped grooves 14; A connecting rod 10 is inserted and arranged inside each through groove 11, and the end of each connecting rod 10 passes through the corresponding through groove 11 and is inserted inside the corresponding arc-shaped groove 14; In this embodiment: by rotating the adjusting plate 13, the arc-shaped groove 14 is driven to rotate. During the rotation of the arc-shaped groove 14, through the limiting cooperation of the through groove 11, the connecting rod 10 moves along the through groove 11, so that multiple groups of clamping blocks 4 connected to the connecting rod 10 approach or move away from each other, and then the crankshaft is clamped.

[0021] Specifically, as Figure 7 shown, limiting grooves 19 are opened on the side walls of the respective through grooves 11 at the positions corresponding to the corresponding connecting rods 10. Limiting blocks 20 are slidably arranged inside each limiting groove 19, and the outer surfaces of the respective limiting blocks 20 are connected to the corresponding connecting rods 10; In this embodiment: through the cooperation of the limiting groove 19 and the limiting block 20, the connecting rod 10 is limited, so that the connecting rod 10 can only reciprocate inside the through groove 11 to prevent the connecting rod 10 from falling off.

[0022] Specifically, as Figure 6 shown, a groove 15 is opened on the other side wall of the adjusting plate 13. A first transmission tooth groove 16 is opened on the inner side wall of the groove 15. A first transmission gear 17 is rotatably arranged inside the groove 15 at the position corresponding to the first transmission tooth groove 16, and the first transmission gear 17 meshes with the first transmission tooth groove 16; A second motor 18 is installed on the inner side wall of the sunken groove 12 at the position corresponding to the first transmission gear 17, and the output end of the second motor 18 is connected to the side wall of the first transmission gear 17; In this embodiment: the second motor 18 is installed at the top end inside the sunken groove 12, and the second motor 18 drives the first transmission gear 17 to rotate. When the first transmission gear 17 rotates, through the cooperation of the first transmission tooth groove 16, the adjusting plate 13 is driven to rotate.

[0023] Specifically, as Figure 3 shown, at one end of each connecting rod 10 away from the connecting block 3, a clamping block 4 is connected; In this embodiment: each clamping block 4 approaches or moves away from each other through the rotation of the adjusting plate 13 and the cooperation of each through groove 11.

[0024] Specifically, as Figure 8 and Figures 11-12 shown, on the side walls of the mutually approaching sides of each clamping block 4, a plurality of sets of storage grooves 28 distributed at intervals are provided. Inside each storage groove 28, a push plate 24 is inserted, and between the end of each push plate 24 and the inner wall of the corresponding storage groove 28, a first return spring 29 is provided; On the side walls of each push plate 24, a plurality of sets of second through holes 36 distributed at intervals are provided. Inside each second through hole 36, a first abutting rod 32 is slidably arranged; On the outer surface of each second through hole 36, a clamping block 34 is provided. At a position corresponding to the clamping block 34 inside the inner side wall of each second through hole 36, a clamping groove 33 is provided. Each clamping block 34 is slidably arranged inside the corresponding clamping groove 33, and between the side wall of each clamping block 34 and the side wall of the corresponding clamping groove 33, a second return spring 35 is provided; At a position corresponding to one set of the first abutting rods 32 between two adjacent sets of storage grooves 28, a third through hole 38 is provided. Inside the third through hole 38, a second abutting rod 37 is slidably arranged. The diameter of the second abutting rod 37 is the same as the diameter of the first abutting rod 32; In this embodiment: through the cooperation of the rotationally arranged adjusting plate 13 and the through groove 11, a plurality of clamping blocks 4 are driven to approach each other to clamp the crankshaft. During the clamping process, a plurality of elastically arranged push plates 24 are driven to contact the surface of the crankshaft. At the same time, a part of the elastically arranged push plates 24 are abutted into the storage grooves 28 by the surface of the crankshaft. When each push plate 24 in contact with the crankshaft is abutted into the storage grooves 28 by the surface of the crankshaft, the ends of each push plate 24 form a shape adapted to the surface of the crankshaft, so as to ensure that each clamping block 4 can contact the surface of the crankshaft, facilitating the clamping of the crankshaft.

[0025] Specifically, as Figures 8-10 shown, at a position corresponding to one set of the first abutting rods 32 on each side push plate 24 on the side wall of the clamping block 4, a first through hole 31 is provided. Inside each first through hole 31, a plug rod 30 is inserted; On one side of each clamping block 4, at a position corresponding to the end of each plug rod 30, an adjusting block 25 is provided. Each adjusting block 25 is connected to the end of the corresponding plug rod 30; On one side of the top of the adjusting block 25, there is a lever 21 with an inverted "L" structure. A guide ring 22 is installed on the outer surface of the corresponding connecting rod 10 at the position corresponding to the lever 21, and one end of the lever 21 is inserted into the inside of the guide ring 22; A second transmission tooth groove 27 is formed in the side wall of the lever 21 at the position corresponding to the guide ring 22. A second transmission gear 26 is rotatably arranged inside the guide ring 22 at the position corresponding to the second transmission tooth groove 27. A third motor 23 is installed at the bottom of the guide ring 22 at the position corresponding to the second transmission gear 26. The output end of the third motor 23 penetrates the bottom of the guide ring 22 and is connected to the second transmission gear 26; In this embodiment: When the third motor 23 is started, the third motor 23 drives the lever 21 to move to one side through the second transmission gear 26. When the lever 21 moves, it pushes the adjusting block 25 to one side, and the adjusting block 25 drives the plug rod 30 to move. During the movement of the plug rod 30, it abuts against the adjacent first abutting rod 32, and the first abutting rod 32 is inserted into the adjacent third through hole 38. At this time, the outermost push plate 24 is fixed under the limit of the first abutting rod 32. At the same time, when the second abutting rod 37 is abutted by the outermost first abutting rod 32, the second abutting rod 37 is inserted into the second through hole 36 on the adjacent push plate 24, and the first abutting rod 32 in the second group of second through holes 36 is abutted into the next group of third through holes 38, so as to fix each push plate 24.

[0026] The specific solution of this scheme is as follows: When it is necessary to lift the casting, start the first motor 7. The first motor 7 drives the lifting rod 2 to move down to the upper part of the casting through the rotation of the transmission screw rod 5. When multiple clamping blocks 4 are located outside the upper end of the casting, start the second motor 18. The second motor 18 drives the adjusting plate 13 to rotate through the cooperation of the first transmission gear 17 and the first transmission tooth groove 16. The cooperation of the rotatably arranged adjusting plate 13 and the through groove 11 drives multiple clamping blocks 4 to approach each other to clamp the crankshaft. During the clamping process, multiple elastically arranged push plates 24 are driven to contact the surface of the crankshaft. At the same time, a part of the elastically arranged push plates 24 are abutted into the storage groove 28 by the surface of the crankshaft. When each push plate 24 in contact with the crankshaft is abutted into the storage groove 28 by the surface of the crankshaft, the end parts of each push plate 24 form a shape adapted to the surface of the crankshaft, so as to ensure that each clamping block 4 can contact the surface of the crankshaft; Then, the third motor 23 is started. The third motor 23 drives the lever 21 to move to one side through the second transmission gear 26. When the lever 21 moves, it pushes the adjusting block 25 to one side, and the adjusting block 25 drives the plug rod 30 to move. During the movement of the plug rod 30, it abuts against the adjacent first abutting rod 32, and the first abutting rod 32 is inserted into the adjacent third through hole 38. At this time, the outermost push plate 24 is fixed under the limitation of the first abutting rod 32. At the same time, when the second abutting rod 37 is abutted by the outermost first abutting rod 32, the second abutting rod 37 is inserted into the second through hole 36 on the adjacent push plate 24, and the first abutting rod 32 in the second group of second through holes 36 is abutted into the next group of third through holes 38, so as to fix each push plate 24. At this time, the first motor 7 is started again, and the first motor 7 drives the transmission lead screw 5 to rotate reversely. Through the cooperation of the lifting rod 2, the crankshaft is lifted out of the mold.

[0027] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0028] The present invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lifting device for casting that is convenient for adjustment, characterized in that, Including: A gantry bracket (1), on both inner side walls of the gantry bracket (1), relief grooves (6) are provided. A transmission lead screw (5) is rotatably arranged inside one group of the relief grooves (6). And a lifting rod (2) is slidably arranged inside the gantry bracket (1) corresponding to the positions of the two groups of relief grooves (6). Guide blocks (8) are arranged at both ends of the lifting rod (2). A fourth through hole (9) is provided in one of the guide blocks (8) corresponding to the position of the corresponding transmission lead screw (5). The transmission lead screw (5) passes through the fourth through hole (9) and is screwed with the lifting rod (2) through the fourth through hole (9). A clamping assembly, arranged below the lifting rod (2), is used for clamping a casting. The clamping assembly includes multiple groups of clamping blocks (4) that approach or move away from each other. An adjusting assembly, arranged on the side walls of the clamping blocks (4) close to each other. The adjusting assembly includes multiple groups of push plates (24) elastically connected to the side walls of the clamping blocks (4).

2. The lifting device for casting that is easy to adjust according to claim 1, wherein, A first motor (7) is arranged at the upper end of the gantry bracket (1) corresponding to the end position of the transmission lead screw (5). The output end of the first motor (7) penetrates through the top of the gantry bracket (1) and is connected to the end of the transmission lead screw (5). The lifting rod (2) drives the lifting rod (2) to move up and down inside the gantry bracket (1) through the cooperation of the transmission lead screw (5) and the guide blocks (8).

3. The lifting device for casting that is easy to adjust according to claim 1, characterized in that, The clamping assembly further includes a connecting block (3) installed at the central position of the lower end of the lifting rod (2). A sunk groove (12) is provided inside the connecting block (3). An adjusting plate (13) is rotatably arranged inside the sunk groove (12). An arc groove (14) is provided on the side wall of the adjusting plate (13) away from the lifting rod (2). Multiple groups of arc grooves (14) are provided, and the multiple groups of arc grooves (14) are evenly spaced in a circumferential state.

4. The lifting device for casting that is easy to adjust according to claim 3, wherein Multiple groups of spaced through grooves (11) are provided on the side wall of the connecting block (3) corresponding to the positions of the arc grooves (14). The through grooves (11) penetrate through the side wall of the connecting block (3) and communicate with the arc grooves (14). Connecting rods (10) are inserted into the through grooves (11). The ends of the connecting rods (10) pass through the corresponding through grooves (11) and are inserted into the corresponding arc grooves (14).

5. The lifting device for casting that is easy to adjust according to claim 4, wherein, Limit grooves (19) are provided on the side walls of the through grooves (11) corresponding to the positions of the corresponding connecting rods (10). Limit blocks (20) are slidably arranged inside the limit grooves (19). The outer surfaces of the limit blocks (20) are connected to the corresponding connecting rods (10).

6. The lifting device for casting that is easy to adjust according to claim 5, wherein, On the other side wall of the adjusting plate (13), a groove (15) is formed. On the inner side wall of the groove (15), a first transmission tooth groove (16) is formed. At a position corresponding to the first transmission tooth groove (16) inside the groove (15), a first transmission gear (17) is rotatably arranged, and the first transmission gear (17) meshes with the first transmission tooth groove (16). Inside the counterbore (12), at a position corresponding to the first transmission gear (17), a second motor (18) is installed, and the output end of the second motor (18) is connected to the side wall of the first transmission gear (17).

7. An adjustable lifting device for casting according to claim 4, characterized in that, At one end of each connecting rod (10) far from the connecting block (3), a clamping block (4) is connected. Through the rotation of the adjusting plate (13) and the cooperation of each through groove (11), the clamping blocks (4) approach or move away from each other.

8. The lifting device for casting which is easy to adjust according to claim 7, characterized in that, On the side walls of each clamping block (4) close to each other, a plurality of sets of storage grooves (28) are formed at intervals. Inside each storage groove (28), a push plate (24) is inserted, and between the end of each push plate (24) and the inner wall of the corresponding storage groove (28), a first return spring (29) is arranged.

9. The lifting device for casting which is convenient to adjust according to claim 8, characterized in that, On the side walls of each push plate (24), a plurality of sets of second through holes (36) are formed at intervals. Inside each second through hole (36), a first abutting rod (32) is slidably arranged. On the outer surface of each second through hole (36), a clamping block (34) is arranged. On the inner side wall of each second through hole (36), at a position corresponding to the clamping block (34), a clamping groove (33) is formed. Each clamping block (34) is slidably arranged inside the corresponding clamping groove (33), and between the side wall of each clamping block (34) and the side wall of the corresponding clamping groove (33), a second return spring (35) is arranged. Between two adjacent sets of storage grooves (28), at a position corresponding to one set of the first abutting rods (32), a third through hole (38) is formed. Inside the third through hole (38), a second abutting rod (37) is slidably arranged, and the diameter of the second abutting rod (37) is the same as that of the first abutting rod (32).

10. The lifting device for casting that is easy to adjust according to claim 9, wherein, On the side wall of the clamping block (4), at a position corresponding to one set of the first abutting rods (32) on each side push plate (24), a first through hole (31) is formed. Inside each first through hole (31), an insertion rod (30) is inserted. On one side of each clamping block (4), at a position corresponding to the end of each insertion rod (30), an adjusting block (25) is arranged, and each adjusting block (25) is connected to the end of the corresponding insertion rod (30). On one side of the top of the adjusting block (25), a toggle lever (21) with an inverted "L" structure is arranged. On the outer surface of the corresponding connecting rod (10), at a position corresponding to the toggle lever (21), a guide ring (22) is installed, and one end of the toggle lever (21) is inserted inside the guide ring (22). A second transmission tooth groove (27) is formed in the side wall of the shift lever (21) corresponding to the position of the guide ring (22). A second transmission gear (26) is rotatably arranged inside the guide ring (22) corresponding to the position of the second transmission tooth groove (27). A third motor (23) is installed at the bottom of the guide ring (22) corresponding to the position of the second transmission gear (26). The output end of the third motor (23) penetrates through the bottom of the guide ring (22) and is connected to the second transmission gear (26).

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