Grabbing mechanism of steel grabbing machine

Abstract

The invention relates to the technical field of grab buckets of steel grabbing machines, and discloses a grabbing mechanism of a steel grabbing machine, the grabbing mechanism comprises a connecting rod, an oil cylinder and a plurality of mechanical claws, a plurality of hinge frames are fixedly connected to the outer wall of the connecting rod at equal intervals, reinforcing ribs are fixedly connected to the interiors of the mechanical claws, and two parallel connecting plates are fixedly connected to the exteriors of the mechanical claws; the top of the connecting plate is hinged to the hinge frame, a first supporting shaft is rotationally installed at the end of the hinge frame, a second supporting shaft is rotationally installed in the middle of the connecting plate, one end of the oil cylinder is fixedly connected to the first supporting shaft, the other end of the oil cylinder is rotationally connected to the second supporting shaft, and a scraper is arranged on the outer wall of the reinforcing rib in a sliding fit mode. And the scraper is tightly attached to the inner wall of the mechanical claw. According to the grabbing mechanism of the steel grabbing machine, residues attached to the inner wall of the mechanical claw can be cleaned in each grabbing action process of the grabbing mechanism, so that the mechanical claw is prevented from being corroded by the residues on the inner wall of the grab bucket.

Description

Technical Field

[0001] The present invention relates to the technical field of steel grab buckets, and more particularly to a grabbing mechanism of a steel grab. Background Art

[0002] In the scrap metal recycling industry, closed grabs are often used to grab small scrap metals such as iron slag, processing offcuts, and cuttings. When grabbing an object, the mechanical claws of a closed grab close into a sealed container-like structure, preventing the small scrap metal from falling during the grabbing process.

[0003] However, although the grab bucket can greatly improve the grabbing rate of small-volume scrap metal, its closed structure leads to a significant increase in its internal contact area. When grabbing scrap metals such as iron slag and cutting chips, some of the iron slag and cutting chips are very likely to adhere to its inner wall. If they are not cleaned in time, the rust on the iron slag and the cutting fluid remaining on the surface of the cutting chips will cause corrosion to the inner wall of the mechanical claw during long-term operation, affecting the service life of the mechanical claw. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a steel grabbing machine grabbing mechanism, which has the advantage of timely cleaning the inner wall of the steel grabbing machine bucket.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a steel grabbing machine grasping mechanism, comprising a connecting rod, an oil cylinder and a plurality of mechanical claws, a plurality of articulated frames fixedly connected to the outer wall of the connecting rod at equal intervals, a reinforcing rib fixedly connected to the inside of the mechanical claw, two connecting plates parallel to each other fixedly connected to the outside of the mechanical claw, the top of the connecting plate is hinged on the articulated frame, a first support shaft is rotatably mounted on the end of the articulated frame, a second support shaft is rotatably mounted on the middle of the connecting plate, one end of the oil cylinder is fixed to the first support shaft, and the other end of the oil cylinder is rotatably connected to the second support shaft, a scraper is slidably fitted on the outer wall of the reinforcing rib, the scraper is tightly attached to the inner wall of the mechanical claw, and a driving structure is provided on the outer wall of the mechanical claw to drive the scraper to slide along the reinforcing rib.

[0006] As a preferred technical solution of the present invention, the driving structure includes a compression spring and a connecting block. A groove for accommodating the sliding of the connecting block is opened on the outer wall of the mechanical claw. The connecting block passes through the wall of the mechanical claw and is fixedly connected to the scraper. The compression spring is installed in the groove to apply an upward elastic force to the connecting block so that the connecting block is always located at the top of the groove.

[0007] As a preferred technical solution of the present invention, arc-shaped guide rails are fixed on the outer walls of the mechanical claws on both sides of the groove, and a sliding seat is slidably engaged on the guide rails. A tension spring is fixed at the bottom of the guide rails to apply a downward pulling force to the sliding seat, and a baffle rod is slidably engaged inside the sliding seat. A wedge-shaped baffle is fixed on the surface of the connecting block, and the baffle rod rests on the top of the baffle and slides with it.

[0008] As a preferred technical solution of the present invention, the elastic force of the tension spring is always greater than the elastic force of the compression spring.

[0009] As a preferred technical solution of the present invention, the tail of the baffle is fixed with a magnetic block, a reset spring is fixed horizontally in the sliding seat, the end of the reset spring is fixed to the outer wall of the magnetic block, and a permanent magnet is fixed to the outer wall of the connecting plate. An attractive magnetic force is generated between the permanent magnet and the magnetic block, and the magnetic force is greater than the elastic force of the reset spring in the horizontal direction.

[0010] As a preferred technical solution of the present invention, a winch structure is provided on the outer wall of the connecting plate to apply an upward force to the sliding seat. The winch structure has a large gear and a small gear. The large gear is fixed to the end of the second support shaft, and the small gear is rotatably installed on the outer wall of the connecting plate. The small gear is matched with the large gear. A winding shaft is coaxially fixed to the end face of the small gear, and a traction rope is wound on the winding shaft. A guide roller is rotatably installed on the top of the connecting plate, and the end of the traction rope is fixed to the top of the sliding seat after changing direction through the guide roller.

[0011] As a preferred technical solution of the present invention, a pad is fixedly connected to the top of the outer wall of the mechanical claw, a guide groove is fixedly connected to the surface of the pad, the guide groove is located above the baffle, a first rack is slidably fitted in the guide groove, a slot plate is fixedly connected to the outside of the guide groove, a transmission gear is rotatably installed in the slot plate, the transmission gear matches the first rack, short racks are slidably fitted on both sides of the slot plate, the short rack matches the transmission gear, the end of the short rack is fixedly connected to a limit block, the limit block abuts against the baffle and provides an upward support force for the baffle.

[0012] As a preferred technical solution of the present invention, a second rack is fixed to the bottom of the first rack, a start-stop gear is fixed to the middle of the second support shaft, the start-stop gear matches the second rack, and an incomplete gear is fixed to the bottom of the oil cylinder, and the incomplete gear is meshed with the start-stop gear.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The steel grabbing machine grasping mechanism provided by the present invention can clean the residues attached to the inner wall of the mechanical claw during each grasping action of the grasping mechanism, so as to prevent the residues on the inner wall of the grab bucket from corroding the mechanical claw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 The structure of the mechanical claw of the present invention is shown in FIG. Figure 1 ;

[0017] Figure 3 The structure of the mechanical claw of the present invention is shown in FIG. Figure 2 ;

[0018] Figure 4 Schematic diagram of the structure of the outer wall of the mechanical claw of the present invention Figure 1 ;

[0019] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0020] Figure 6 Schematic diagram of the structure of the outer wall of the mechanical claw of the present invention Figure 2 ;

[0021] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0022] Figure 8 This is a front view of the outer wall of the mechanical claw of the present invention;

[0023] Figure 9 For the present invention Figure 8 Enlarged view of point C in the middle;

[0024] Figure 10 Schematic diagram of the installation structure of the baffle of the present invention;

[0025] Figure 11 This is a schematic diagram of the structure of the inner wall of the mechanical claw of the present invention;

[0026] Figure 12 This is a schematic diagram of the connection between the baffle, connecting block and scraper of the present invention;

[0027] Figure 13 This is a front view of the mechanical claw of the present invention;

[0028] Figure 14 For the present invention Figure 13 Middle aa-direction cross-section;

[0029] Figure 15 For the present invention Figure 13 Middle bb section;

[0030] In the figure: 1. connecting rod; 2. articulated frame; 3. mechanical claw; 301. reinforcing rib; 4. connecting plate; 5. first support shaft; 6. oil cylinder; 7. second support shaft; 8. large gear; 9. small gear; 10. reeling shaft; 11. traction rope; 12. guide roller; 13. incomplete gear; 14. guide rail; 15. sliding seat; 16. stop rod; 17. magnetic block; 18. reset spring; 19. tension spring; 20. pad; 21. guide groove; 22. groove plate; 23. limit block; 24. short rack; 25. transmission gear; 26. first rack; 27. second rack; 28. start-stop gear; 29. ​​baffle; 30. connecting block; 31. scraper; 32. compression spring; 33. permanent magnet. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figures 1 to 4 As shown, the present invention provides a grabbing mechanism of a steel grabber, comprising a connecting rod 1, an oil cylinder 6 and a plurality of mechanical claws 3, a plurality of articulated frames 2 are fixedly connected at equal intervals on the outer wall of the connecting rod 1, a reinforcing rib 301 is fixedly connected inside the mechanical claw 3, two connecting plates 4 parallel to each other are fixedly connected outside the mechanical claw 3, the top of the connecting plate 4 is hinged on the articulated frame 2, a first support shaft 5 is rotatably installed on the end of the articulated frame 2, a second support shaft 7 is rotatably installed in the middle of the connecting plate 4, one end of the oil cylinder 6 is fixed on the first support shaft 5, and the other end of the oil cylinder 6 is rotatably connected to the second support shaft 7, a scraper 31 is slidably fitted on the outer wall of the reinforcing rib 301, the scraper 31 is tightly attached to the inner wall of the mechanical claw 3, and a driving structure is provided on the outer wall of the mechanical claw 3 to drive the scraper 31 to slide along the reinforcing rib 301. During operation, the connecting rod 1 is connected to the steel grabber's lifting equipment, allowing the lifting equipment to control the entire mechanism's lifting and lowering motion. The hydraulic cylinder 6 contracts to expand the mechanical claw 3, while the hydraulic cylinder 6 extends to close it. After a grasping motion is completed, the drive mechanism drives the scraper 31 to perform a return motion along the reinforcement rib 301 to clean any residue from the inner wall of the mechanical claw 3.

[0033] like Figure 10-12 As shown, the driving structure includes a compression spring 32 and a connecting block 30. A groove for accommodating the sliding of the connecting block 30 is opened on the outer wall of the mechanical claw 3. The connecting block 30 passes through the wall of the mechanical claw 3 and is fixedly connected to the scraper 31. The compression spring 32 is installed in the groove to apply an upward elastic force to the connecting block 30 so that the connecting block 30 is always located at the top of the groove.

[0034] The connecting block 30 and the scraper 31 are fixedly connected and can move synchronously. Under the elastic force of the compression spring 32 on the connecting block 30 , the connecting block 30 and the scraper 31 can overcome gravity and remain on the top of the mechanical claw 3 .

[0035] like Figure 4-9 As shown, arc-shaped guide rails 14 are fixed to the outer walls of the mechanical claws 3 on both sides of the groove, and a sliding seat 15 is slidably fitted on the guide rails 14. A tension spring 19 is fixed to the bottom of the guide rails 14 to apply a downward pulling force to the sliding seat 15, and the elastic force of the tension spring 19 is always greater than the elastic force of the compression spring 32. A baffle rod 16 is slidably fitted inside the sliding seat 15, and a wedge-shaped baffle 29 is fixed to the surface of the connecting block 30. The baffle rod 16 rests on the top of the baffle 29 and slides with it.

[0036] Under the elastic force of the tension spring 19 on the sliding seat 15, the sliding seat 15 can move along the guide rail 14 to the bottom of the mechanical claw 3;

[0037] The baffle rod 16 extending from the sliding seat 15 can rest against the top of the baffle 29. When the sliding seat 15 slides down along the guide rail 14, the elastic force of the tension spring 19 can be applied to the baffle 29 to move the baffle 29 downward. Since the baffle 29 is fixedly connected to the scraper 31 through the connecting block 30, the downward movement of the baffle 29 will drive the scraper 31 to move downward synchronously, so that the scraper 31 can clean the residue on the inner wall of the mechanical claw 3.

[0038] like Figure 6 and Figure 7 As shown, the tail of the blocking rod 16 is fixed with a magnetic block 17, and a reset spring 18 is fixed horizontally in the sliding seat 15. The end of the reset spring 18 is fixed to the outer wall of the magnetic block 17, and a permanent magnet 33 is fixed to the outer wall of the connecting plate 4. An attractive magnetic force is generated between the permanent magnet 33 and the magnetic block 17, and the magnetic force is greater than the elastic force of the reset spring 18 in the horizontal direction.

[0039] As the sliding seat 15 moves downward along the guide rail 14, the magnetic block 17 will also move downward synchronously. At a certain moment during the downward movement of the magnetic block 17, it will overlap with the permanent magnet 33. After the two overlap, the magnetic block 17 is acted upon by the magnetic force and moves toward the location of the permanent magnet 33. During the movement of the magnetic block 17 toward the permanent magnet 33, the baffle 16 will be moved away from the top of the baffle 29. After the baffle 16 is moved away from the top of the baffle 29, the upward movement of the baffle 29 is no longer restricted. At this time, under the elastic force of the compression spring 32, the baffle 29, the connecting block 30 and the scraper 31 will be reset to the top of the mechanical claw 3, thereby completing the return action of the scraper 31.

[0040] like Figure 4-Figure 7As shown, a winch structure is provided on the outer wall of the connecting plate 4 to apply an upward force to the sliding seat 15. The winch structure comprises a large gear 8 and a small gear 9. The large gear 8 is fixedly connected to the end of the second support shaft 7. The small gear 9 is rotatably installed on the outer wall of the connecting plate 4. The small gear 9 matches the large gear 8. A winding shaft 10 is coaxially fixed to the end face of the small gear 9. A traction rope 11 is wound around the winding shaft 10. A guide roller 12 is rotatably installed on the top of the connecting plate 4. The end of the traction rope 11 is fixed to the top of the sliding seat 15 after changing direction through the guide roller 12.

[0041] When the oil cylinder 6 drives the mechanical claw 3 to open and close, the second support shaft 11 will rotate. The rotation of the second support shaft 11 will drive the large gear 8 to rotate synchronously. The rotation of the large gear 8 will drive the small gear 9 to rotate. The rotation of the small gear 9 will drive the reel 10 to rotate. The rotation of the reel 10 can enable the traction rope 11 to reel in or unreel.

[0042] When the reel 10 reels in the traction rope 11, the traction rope 11 applies an upward pulling force to the sliding seat 15, so that the sliding seat 15 overcomes the pulling force of the tension spring 19 and moves to the top of the mechanical claw 3;

[0043] When the reel 10 unwinds the traction rope 11 , the upward pulling force on the sliding seat 15 will be removed. At this time, the sliding seat 15 will move to the top of the mechanical claw 3 under the pulling force of the tension spring 19 .

[0044] like Figure 6-Figure 9 As shown, a pad 20 is fixed to the top of the outer wall of the mechanical claw 3, and a guide groove 21 is fixed to the surface of the pad 20. The guide groove 21 is located above the baffle 29. A first rack 26 is slidably fitted in the guide groove 21. A slot plate 22 is fixed to the outside of the guide groove 21. A transmission gear 25 is rotatably installed in the slot plate 22. The transmission gear 25 matches the first rack 26. Short racks 24 are slidably fitted on both sides of the slot plate 22. The short rack 24 matches the transmission gear 25. The end of the short rack 24 is fixed to a limit block 23. The limit block 23 abuts against the baffle 29 and provides an upward support force for the baffle 29.

[0045] When the first rack 26 slides in the guide groove 21, it drives the transmission gear 25 to rotate. The rotation of the transmission gear 25 drives the short rack 24 to move linearly. The short rack 24 is fixedly connected to the limit block 23. The movement of the short rack 24 drives the limit block 23 to move, thereby controlling whether the limit block 23 limits the baffle 29.

[0046] When the limiting block 23 limits the baffle 29, the baffle 29 cannot move downward; when the limiting block 23 releases the limit on the baffle 29, the baffle 29 can move downward freely.

[0047] like Figure 6-Figure 9As shown, a second rack 27 is fixed to the bottom of the first rack 26, a start-stop gear 28 is fixed to the middle of the second support shaft 7, the start-stop gear 28 matches the second rack 27, and an incomplete gear 13 is fixed to the bottom of the cylinder 6, and the incomplete gear 13 is meshed with the start-stop gear 28.

[0048] After the start-stop gear 28 drives the second rack 27 to move upward, the first rack 26 will also move upward. The upward movement of the first rack 26 will cooperate with the transmission gear 25 and the short rack 24 to cause the limit block 23 to limit the baffle 29; and after the start-stop gear 28 drives the second rack 27 to move downward, the limit block 23 will release the limit on the baffle 29.

[0049] The working principle and use process of the present invention:

[0050] Take a grab action as an example:

[0051] like Figure 13-15 As shown:

[0052] S1: Mechanical claw 3 opens and releases the object in the grab bucket:

[0053] like Figure 14 , the oil cylinder 6 contracts to open the mechanical claw 3, the distance between the oil cylinder 6 and the outer wall of the mechanical claw 3 will increase, and the oil cylinder 6 will drive the start-stop gear 28 to rotate clockwise through the incomplete gear 13 at the bottom;

[0054] The start-stop gear 28 rotates clockwise to drive the second rack 27 to move downward until the start-stop gear 28 is located at the end of the second rack 27. The second rack 27 is separated from the start-stop gear 28, and the start-stop gear 28 rotates clockwise.

[0055] When the second rack 27 moves downward, it drives the first rack 26 to move downward. The downward movement of the first rack 26 will cause the limit block 23 to be pulled away from the baffle 29 through the cooperation of the transmission gear 25 and the short rack 24. At this time, the limit block 23 releases the restriction on the baffle 29.

[0056] S2: The scraper 31 cleans the residue on the inner wall of the mechanical claw 3:

[0057] After the restriction of the baffle 29 is released, as the start-stop gear 28 rotates clockwise, the traction rope 11 on the reel 10 will be unwound;

[0058] During the pay-off process, the tension of the tension spring 19 on the sliding seat 15 is applied to the top of the baffle 29 through the baffle rod 16. Under the tension of the tension spring 19, the baffle 29 moves from top to bottom.

[0059] Since the baffle 29, the connecting block 30 and the scraper 31 are fixedly connected, the baffle 29 will drive the scraper 31 to move downward synchronously during its downward movement, and the scraper 31 will scrape off the residue on the inner wall of the mechanical claw 3;

[0060] During the downward movement of the sliding seat 15, the magnetic block 17 will also move downward synchronously. At a certain moment during the downward movement of the magnetic block 17, it will overlap with the permanent magnet 33. After the two overlap, the magnetic block 17 will move toward the location of the permanent magnet 33 under the action of the magnetic force. During the movement of the magnetic block 17 toward the permanent magnet 33, the baffle rod 16 will be moved away from the top of the baffle 29. The baffle rod 16 moves away from the top of the baffle 29.

[0061] S3: Scraper 31 return:

[0062] After the baffle 16 is removed from the top of the baffle 29, the upward movement of the baffle 29 is no longer restricted. Under the elastic force of the compression spring 32, the baffle 29, the connecting block 30 and the scraper 31 will be synchronously reset to the top of the mechanical claw 3;

[0063] S4: Mechanical claw 3 closes to grab the material:

[0064] When the mechanical claw 3 is closing, the distance between the oil cylinder 6 and the outer wall of the mechanical claw 3 decreases. At this time, the incomplete gear 13 at the bottom of the oil cylinder 6 drives the start-stop gear 28 to rotate counterclockwise.

[0065] The rotation of the start-stop gear 28 drives the first rack 26 to move upward through the second rack 27 until the first rack 26 is separated from the start-stop gear 28;

[0066] The upward movement of the first rack 26 will cause the limit block 23 to move toward the baffle 29 through the cooperation of the transmission gear 25 and the short rack 24. Since the baffle 29 has been reset to the top of the mechanical claw 3 in the above S3, the limit block 23 will now restrict the baffle 29 again.

[0067] The start-stop gear 28 continues to rotate counterclockwise, and as the start-stop gear 28 continues to rotate counterclockwise, the reel 10 reels the traction rope 11. During the reeling process, the traction rope 11 exerts an upward pulling force on the sliding seat 15, causing the sliding seat 15 to move upward along the guide rail 14.

[0068] As the sliding seat 15 moves upward, the distance between the magnetic block 17 and the permanent magnet 33 gradually increases, and the magnetic force between the two continues to decrease. At a certain moment, the return spring 18 drives the blocking rod 16 to re-extend from the sliding seat 15;

[0069] After the blocking rod 16 is re-extended from the sliding seat 15, the sliding seat 15 continues to move upward under the pulling force of the traction rope 11. When the blocking rod 16 contacts the baffle 29 again, the blocking rod 16 will move along the inclined surface of the baffle 29 to above the baffle 29. At this time, the mechanical claw 3 completes the closing work.

[0070] Compared with the gripping mechanism used in traditional steel grabbers, the gripping mechanism provided by the present invention can clean the residues attached to the inner wall of the mechanical claw 3 during each gripping action of the gripping mechanism to prevent the residues on the inner wall of the grabber from corroding the mechanical claw 3.

[0071] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0072] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A steel grabbing mechanism, comprising a connecting rod (1), a cylinder (6) and a plurality of mechanical claws (3), characterized in that: A plurality of articulated frames (2) are fixedly connected at equal intervals on the outer wall of the connecting rod (1); a reinforcing rib (301) is fixedly connected inside the mechanical claw (3); two parallel connecting plates (4) are fixedly connected outside the mechanical claw (3); the top of the connecting plate (4) is hinged on the articulated frame (2); a first support shaft (5) is rotatably mounted on the end of the articulated frame (2); a second support shaft (7) is rotatably mounted on the middle of the connecting plate (4); one end of the oil cylinder (6) is fixedly connected to the first support shaft (5); the other end of the oil cylinder (6) is rotatably connected to the second support shaft (7); a scraper (31) is slidably fitted on the outer wall of the reinforcing rib (301); the scraper (31) is tightly attached to the inner wall of the mechanical claw (3); a driving structure is provided on the outer wall of the mechanical claw (3) to drive the scraper (31) to slide along the reinforcing rib (301).

2. The steel grabbing mechanism according to claim 1, characterized in that: The driving structure comprises a compression spring (32) and a connecting block (30); a groove for accommodating the sliding of the connecting block (30) is provided on the outer wall of the mechanical claw (3); the connecting block (30) passes through the wall of the mechanical claw (3) and is fixedly connected to the scraper (31); the compression spring (32) is installed in the groove to apply an upward elastic force to the connecting block (30), so that the connecting block (30) is always located at the top of the groove.

3. The steel grabbing mechanism according to claim 2, characterized in that: A circular arc-shaped guide rail (14) is fixed on the outer wall of the mechanical claw (3) on both sides of the groove, and a sliding seat (15) is slidably matched on the guide rail (14). A tension spring (19) is fixed at the bottom of the guide rail (14) to apply a downward pulling force to the sliding seat (15). A blocking rod (16) is slidably matched inside the sliding seat (15). A wedge-shaped blocking plate (29) is fixed on the surface of the connecting block (30), and the blocking rod (16) abuts against the top of the blocking plate (29) and slidably matches with it.

4. The steel grabbing mechanism according to claim 3, characterized in that: The elastic force of the tension spring (19) is always greater than the elastic force of the compression spring (32).

5. The steel grabbing mechanism according to claim 4, characterized in that: The tail of the blocking rod (16) is fixed with a magnetic block (17), a reset spring (18) is fixed horizontally in the sliding seat (15), the end of the reset spring (18) is fixed on the outer wall of the magnetic block (17), and a permanent magnet (33) is fixed on the outer wall of the connecting plate (4). An attractive magnetic force is generated between the permanent magnet (33) and the magnetic block (17), and the magnetic force is greater than the elastic force of the reset spring (18) in the horizontal direction.

6. The steel grabbing mechanism according to claim 5, characterized in that: A hoisting structure is provided on the outer wall of the connecting plate (4) to apply an upward force to the sliding seat (15), the hoisting structure comprises a large gear (8) and a small gear (9), the large gear (8) is fixedly connected to the end of the second support shaft (7), the small gear (9) is rotatably mounted on the outer wall of the connecting plate (4), the small gear (9) matches the large gear (8), a reeling shaft (10) is coaxially fixed to the end face of the small gear (9), a traction rope (11) is wound around the reeling shaft (10), a guide roller (12) is rotatably mounted on the top of the connecting plate (4), and the end of the traction rope (11) is fixed to the top of the sliding seat (15) after changing direction via the guide roller (12).

7. The steel grabbing mechanism according to claim 6, characterized in that: The top of the outer wall of the mechanical claw (3) is fixed with a pad (20), and the surface of the pad (20) is fixed with a guide groove (21), which is located above the baffle (29). A first rack (26) is slidably fitted in the guide groove (21), and a slot plate (22) is fixed to the outside of the guide groove (21). A transmission gear (25) is rotatably installed in the slot plate (22), and the transmission gear (25) matches the first rack (26). Short racks (24) are slidably fitted on both sides of the slot plate (22), and the short racks (24) match the transmission gear (25). The end of the short rack (24) is fixed with a limit block (23), and the limit block (23) abuts against the baffle (29) and provides an upward support force for the baffle (29).

8. The steel grabbing mechanism according to claim 7, characterized in that: A second rack (27) is fixedly connected to the bottom of the first rack (26), a start-stop gear (28) is fixedly connected to the middle of the second support shaft (7), the start-stop gear (28) matches the second rack (27), and an incomplete gear (13) is fixedly connected to the bottom of the oil cylinder (6), and the incomplete gear (13) is meshed with the start-stop gear (28).

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