Portal crane grab automatic unloading device

Abstract

The utility model discloses a portal crane grab bucket automatic unloading device relates to grab bucket technical field, this portal crane grab bucket automatic unloading device, include: grab bucket paw and material loading and unloading device, still include: electromagnet, fixedly set in the inside of grab bucket paw and material loading and unloading device, the protection cover is set up in the inside of grab bucket paw and material loading and unloading device, the electromagnet is located in the inside of protection cover, protection cover can slide along electromagnet length direction, this portal crane grab bucket automatic unloading device, through the setting of protection cover, can effectively protect electromagnet, avoid its direct contact extrusion with material, improve the life, further, through the setting of connecting piece, connecting bolt and fixed structure, can fast install or disassemble to protection cover, improve the replacement efficiency of protection cover.

Description

Technical Field

[0001] This utility model relates to the field of grab bucket technology, specifically to an automatic unloading device for a gantry crane grab bucket. Background Technology

[0002] A grab bucket is a special lifting device installed on a crane (such as a gantry crane, bridge crane, or tower crane) for grabbing and transporting bulk materials (such as ore, coal, grain, and construction waste). Its core function is to grab and unload materials through an "opening and closing action". It is widely used in ports, mines, warehouses, construction and other scenarios, and is a core tool for heavy-duty bulk material handling. To facilitate unloading and loading, automatic unloading devices are usually installed on the grab bucket.

[0003] Existing technologies, such as the "Automatic Unloading Device for a Portal Crane Grab Bucket" disclosed in Chinese Patent "CN210795533U", include: a moving device, an electromagnetic grab bucket, and a material collection / unloading device. The moving device includes a pulley support, a load-bearing slide rod, a pulley, a motor, an axle, a wheel, a pull rope, a protective sleeve, a grab bucket mounting base, a connecting rod, an elastic rope, and a limiting block. The electromagnetic grab bucket includes a lifting ring, a grab bucket base, a grab bucket claw, a first electromagnet, an ear plate, a hydraulic telescopic rod, a connecting block, and a second electromagnet. The material collection / unloading device includes a hinge ring, a cross plate, a support plate, and a third electromagnet.

[0004] As described in the above-mentioned utility model, although the tension or clamping force of the grab claw is increased by passing the same or opposite current to the second and third electromagnets so that the opposite magnetic poles are the same or opposite, the second and third magnets are both located inside the grab. During the clamping process, the surface of the magnet will always be in direct contact with the clamped material. In this case, the magnet is prone to damage and breakage, reducing the service life of the magnet. Utility Model Content

[0005] The purpose of this utility model is to provide an automatic unloading device for a gantry crane grab bucket to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic unloading device for a gantry crane grab bucket, comprising: a grab bucket claw and a material loading and unloading device, further comprising: an electromagnet, fixedly disposed inside the grab bucket claw and the material loading and unloading device; a protective cover, disposed inside the grab bucket claw and the material loading and unloading device, the electromagnet being located inside the protective cover, the protective cover being slidable along the length direction of the electromagnet; a connecting piece, disposed outside the grab bucket claw and the material loading and unloading device, the connecting piece being at the same horizontal position as the electromagnet; a connecting bolt fixedly disposed inside the protective cover; a fixing structure, fixedly disposed outside the connecting piece, the connecting bolt being sequentially passed through the grab bucket claw and the connecting piece and fixedly disposed between them; and a striking mechanism, disposed on the grab bucket claw, wherein when the striking mechanism is in operation, the striking mechanism drives the connecting piece to reciprocate, thereby causing the protective cover to vibrate.

[0007] Preferably, the striking mechanism includes: a fixed frame, fixedly mounted on one side of the grab claw, the fixed frame and the connecting piece being located on the same side; a striking rod, slidably mounted on the fixed frame, one end of the striking rod contacting one side of the connecting piece; an adjusting disc, rotatably mounted on the fixed frame, a lever fixedly mounted on the surface of the adjusting disc; and a reciprocating rod, rotatably mounted on the fixed frame, one end of the reciprocating rod engaging with the surface of the striking rod, the interior of the reciprocating rod slidably disposed with the outer surface of the lever; when the adjusting disc is rotated, the lever slides inside the reciprocating rod, so that the reciprocating rod reciprocates to push the striking rod to reciprocate.

[0008] Preferably, it further includes: a guide rod, fixedly mounted on the grab claw, with the connecting piece slidably mounted inside the guide rod and the outer surface of the guide rod; a return spring, sleeved on the guide rod, with both ends of the return spring abutting against the surface of the guide rod and the surface of the connecting piece respectively; and a drive motor, fixedly mounted on the fixed frame, with the output end of the drive motor drivingly mounted to the shaft end of the adjusting disc.

[0009] Preferably, it further includes: a positioning through hole, which is formed through the striking rod; and a positioning piece, which is fixedly mounted on the fixing frame, wherein the outer surface of the positioning piece is slidably disposed with respect to the interior of the positioning through hole.

[0010] Preferably, the fixing structure includes: an adjusting seat, fixedly mounted on the connecting piece; an adjusting block, slidably mounted inside the adjusting seat, with a fixing rod fixedly mounted at one end of the adjusting block; a fixing through hole, penetrating through the connecting bolt, wherein when one end of the fixing rod passes through the fixing through hole, the protective cover is limited; and a docking seat, fixedly mounted on the connecting piece, with one end of the fixing rod inserted into the docking seat.

[0011] Preferably, it further includes: a compression spring, fixedly disposed inside the adjusting seat, one end of the compression spring being fixedly disposed to the surface of the adjusting block; and a limiting through hole, which is opened through both sides of the adjusting seat, and the two sides of the adjusting block are slidably disposed inside the limiting through hole.

[0012] Preferably, it further includes: a connecting plate, fixedly disposed on one side of the adjusting seat; a baffle, slidably disposed on the connecting plate; a tension spring, fixedly disposed on the connecting plate, the other end of the tension spring being fixed to the baffle; and a limiting sleeve, fixedly disposed on the connecting plate, the outer surface of the baffle being slidably disposed with the inside of the limiting sleeve.

[0013] Preferably, it further includes: a square through hole extending through the grab claw, with the connecting bolt located inside the square through hole; and a circular through hole extending through the connecting piece, with the connecting bolt passing through the circular through hole.

[0014] This utility model provides an automatic unloading device for a gantry crane grab bucket, which has the following advantages: (1) By setting up a protective cover, this utility model can effectively protect the electromagnet, avoid direct contact and squeezing with the material, and improve its service life. Furthermore, by setting up connecting pieces, connecting bolts and fixing structures, the protective cover can be quickly installed or disassembled, improving the efficiency of replacing the protective cover.

[0015] (2) This utility model drives the adjustment plate to rotate by a drive motor. During the rotation of the adjustment plate, the actuating rod slides inside the reciprocating rod, so that the actuating rod pushes the reciprocating rod to rotate reciprocally. During the rotation of the reciprocating rod, the striking rod is pushed to move reciprocally, which in turn pushes the connecting piece to shake, so that the protective cover shakes together. During the shaking of the protective cover, the attached raw material is thrown off, realizing the self-cleaning effect of the grab claw and improving the cleaning efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a first exploded view of the grab claw structure of this utility model; Figure 3 This is a second exploded view of the grab claw structure of this utility model; Figure 4 This is a schematic diagram of the structure between the connecting piece and the protective cover in this utility model.

[0017] Figure 5 This is an exploded view of the fixed structure of this utility model.

[0018] Figure 6 This is a schematic diagram of the structure of the tapping mechanism in this practical application.

[0019] In the diagram: 1. Grab claw; 2. Material loading and unloading device; 3. Electromagnet; 4. Protective cover; 5. Connecting bolt; 6. Square through hole; 7. Connecting piece; 8. Circular through hole; 9. Fixing structure; 91. Adjusting seat; 92. Adjusting block; 93. Fixing rod; 94. Fixing through hole; 95. Docking seat; 10. Compression spring; 11. Limiting through hole; 12. Connecting plate; 13. Baffle; 14. Tensioning spring; 15. Limiting sleeve; 16. Fixing frame; 17. Beating rod; 18. Adjusting disc; 19. Drive motor; 20. Actuating rod; 21. Reciprocating rod; 22. Positioning through hole; 23. Positioning piece; 24. Guide rod; 25. Return spring. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] This utility model provides the following technical solution: Referring to 1-6, in this embodiment, an automatic unloading device for a gantry crane grab bucket includes: a grab claw 1 and a material loading and unloading device 2. The grab claw 1 is made of low-alloy high-strength steel, welded and then heat-treated as a whole, and coated with a wear-resistant ceramic coating. It also includes: an electromagnet 3, fixedly installed inside the grab claw 1 and the material loading and unloading device 2, the outer shell of the electromagnet 3 being made of stainless steel, corrosion-resistant and insulating; a protective cover 4, installed inside the grab claw 1 and the material loading and unloading device 2, the protective cover 4 being made of polycarbonate material, with good light transmittance (facilitating observation of the electromagnet 3's status) and impact resistance, the electromagnet 3 being located inside the protective cover 4, and the protective cover 4 being able to slide along the length of the electromagnet 3; a connecting piece 7, installed outside the grab claw 1 and the material loading and unloading device 2, the connecting piece 7 being at the same horizontal position as the electromagnet 3; and a connecting bolt 5 fixedly installed inside the protective cover 4, the connecting bolt 5 being made of steel, chrome-plated, rust-proof and wear-resistant. The fixed structure 9 is fixedly installed on the outside of the connecting piece 7. The connecting bolt 5 passes through the grab claw 1 and the connecting piece 7 in sequence and is fixedly installed between the fixed structure 9 and the fixed structure 9. The slapping mechanism is installed on the grab claw 1. When the slapping mechanism is set to run, the slapping mechanism drives the connecting piece 7 to reciprocate so that the protective cover 4 vibrates.

[0022] The material loading and unloading device 2 is hinged to the grab claw 1 by a pin. A self-lubricating bearing is installed at the hinge. The electromagnet 3 can be protected and its service life can be extended by the protective cover 4. The protective cover 4 can be limited by the connecting piece 7 in cooperation with the connecting bolt 5 and the fixing structure 9.

[0023] The striking mechanism includes: a fixed frame 16, which is fixedly installed on one side of the grab claw 1. The fixed frame 16 is made of steel and coated with anti-rust paint. The fixed frame 16 and the connecting plate 7 are located on the same side; and a striking rod 17, which is slidably installed on the fixed frame 16. The striking rod 17 is made of steel and the rack section is surface hardened. One end of the striking rod 17 is in contact with one side of the connecting plate 7. An adjusting disc 18 is rotatably mounted on a fixed frame 16, and a toggle lever 20 is fixedly mounted on the surface of the adjusting disc 18. A reciprocating lever 21 is rotatably mounted on the fixed frame 16, with one end of the reciprocating lever 21 engaging with the surface of the striking lever 17. The reciprocating lever 21 is slidably mounted inside the toggle lever 20. Both the adjusting disc 18 and the toggle lever 20 are manufactured as a single piece, made of steel, and have a blackened surface. When the adjusting disc 18 is rotated, the toggle lever 20 slides inside the reciprocating lever 21, causing the reciprocating lever 21 to reciprocate and push the striking lever 17 to reciprocate.

[0024] The device includes a striking rod 17 that can reciprocate to strike the connecting piece 7, causing the protective cover 4 connected to the connecting piece 7 to vibrate, thereby dislodging the raw material from the surface of the protective cover 4 and achieving a cleaning effect. The device also includes an adjusting disc 18 that can continuously rotate in conjunction with the actuating rod 20 to achieve the reciprocating rotation of the reciprocating rod 21.

[0025] It also includes: a guide rod 24, fixedly mounted on the grab claw 1, the guide rod 24 is made of steel with a chrome-plated surface, and the connecting piece 7 is slidably mounted inside the guide rod 24; a return spring 25, sleeved on the guide rod 24, the return spring 25 is a cylindrical helical compression spring, and the two ends of the return spring 25 respectively abut against the surface of the guide rod 24 and the surface of the connecting piece 7; and a drive motor 19, fixedly mounted on the fixing frame 16, the drive motor 19 housing is made of aluminum alloy with good heat dissipation, and the output end of the drive motor 19 is driven by the shaft end of the adjusting plate 18. The guide rod 24 can be used to position and guide the connecting piece 7, and the return spring 25 can be used to reset the connecting piece 7.

[0026] It also includes: a positioning through hole 22, which is opened through the striking rod 17; and a positioning piece 23, which is fixedly set on the fixing frame 16. The outer surface of the positioning piece 23 is slidably set with the inside of the positioning through hole 22, which can prevent the striking rod 17 from shaking or rotating and improve the meshing force.

[0027] The fixing structure 9 includes: an adjusting seat 91, which is fixedly mounted on the connecting piece 7; an adjusting block 92, which is slidably mounted inside the adjusting seat 91, with a fixing rod 93 fixedly mounted at one end of the adjusting block 92; a fixing through hole 94, which is opened through the connecting bolt 5, and the protective cover 4 is limited when one end of the fixing rod 93 passes through the fixing through hole 94; and a docking seat 95, which is fixedly mounted on the connecting piece 7, with one end of the fixing rod 93 inserted into the docking seat 95.

[0028] It also includes: a pressure spring 10, which is fixedly installed inside the adjusting seat 91, with one end of the pressure spring 10 fixedly installed on the surface of the adjusting block 92; and a limiting through hole 11, which is opened through both sides of the adjusting seat 91, with both sides of the adjusting block 92 slidably installed inside the limiting through hole 11. The pressure spring 10 can apply a continuous force to the adjusting block 92, preventing it from falling off from the docking seat 95 and the fixing through hole 94 without external force. The limiting through hole 11 can limit the adjusting block 92 and improve its stability inside the adjusting seat 91.

[0029] It also includes: a connecting plate 12, fixedly mounted on one side of the adjusting seat 91; a baffle 13, slidably mounted on the connecting plate 12; a tension spring 14, fixedly mounted on the connecting plate 12, with the other end of the tension spring 14 fixed to the baffle 13; and a limiting sleeve 15, fixedly mounted on the connecting plate 12, with the outer surface of the baffle 13 slidably mounted to the inside of the limiting sleeve 15. By setting the baffle 13, the fixing rod 93 can be limited during disassembly, making disassembly more convenient.

[0030] It also includes: a square through hole 6, which is opened through the grab claw 1, and the connecting bolt 5 is located inside the square through hole 6; a circular through hole 8, which is opened through the connecting piece 7, and the connecting bolt 5 passes through the circular through hole 8. By setting the square through hole 6, the protective cover 4 can be made to move with the connecting piece 7. A protective cover can be installed on the outside of the grab claw 1 to protect the structure on the connecting piece 7 and the fixing frame 16 and prevent the parts from directly contacting the outside.

[0031] This utility model provides an automatic unloading device for a gantry crane grab bucket, the specific working principle of which is as follows: Before use, first complete the installation of the protective cover 4: put the protective cover 4 on the outside of the electromagnet 3, so that the connecting bolt 5 passes through the square through hole 6 of the grab claw 1 and the round through hole 8 of the connecting piece 7; push the adjusting block 92 to compress the pressure spring 10, align the fixing rod 93 with the fixing through hole 94 of the connecting bolt 5 and insert it, while the other end of the fixing rod 93 is inserted into the docking seat 95, release the adjusting block 92, the pressure spring 10 returns to its original position and pushes the adjusting block 92, so that the fixing rod 93 is stably limited, and the installation of the protective cover 4 is completed. During loading, the electromagnet 3 is energized to generate attraction, which, together with the grab claw 1, grabs the material. The material comes into contact with the protective cover 4, preventing direct compression of the electromagnet 3. After unloading, if there is material adhering to the surface of the protective cover 4, the drive motor 19 is started, which drives the adjustment plate 18 to rotate. The actuating rod 20 on the adjustment plate 18 slides in the long slot of the reciprocating rod 21, pushing the reciprocating rod 21 to rotate back and forth around the fixed frame 16. The gear section of the reciprocating rod 21 meshes with the rack section of the striking rod 17, causing the striking rod 17 to slide back and forth along the positioning plate 23. One end of the striking rod 17 continuously strikes the connecting plate 7. The connecting plate 7 slides along the guide rod 24 and compresses the return spring 25. When the return spring 25 returns to its original position, it causes the connecting plate 7 to shake in the opposite direction, thereby causing the protective cover 4 to vibrate synchronously, shaking off the material adhering to the surface and achieving self-cleaning. If the protective cover 4 needs to be replaced, the staff can directly move the adjusting block 92 to make the fixing rod 93 exit from the fixing through hole 94. At this time, the tension spring 14 will restore its elastic deformation and pull the baffle 13 to move, so that the baffle blocks the fixing rod 93. Then the protective cover 4 can be directly pulled out and replaced. After replacing the new protective cover 4, repeat the installation steps.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic unloading device for a gantry crane grab bucket, comprising: The grab claw (1) and the material loading and unloading device (2) are characterized in that they further include: An electromagnet (3) is fixedly installed inside the grab claw (1) and the material loading and unloading device (2); A protective cover (4) is provided inside the grab claw (1) and the material loading and unloading device (2). The electromagnet (3) is located inside the protective cover (4). The protective cover (4) can slide along the length of the electromagnet (3). A connecting piece (7) is provided on the outside of the grab claw (1) and the material loading and unloading device (2), and the connecting piece (7) and the electromagnet (3) are located at the same horizontal position; The connecting bolt (5) is fixedly installed inside the protective cover (4); The fixing structure (9) is fixedly installed on the outside of the connecting piece (7), and the connecting bolt (5) passes through the grab claw (1) and the connecting piece (7) in sequence and is fixedly installed between the fixing structure (9); A slapping mechanism is provided on the grab claw (1). When the slapping mechanism is in operation, it drives the connecting piece (7) to reciprocate so as to make the protective cover (4) vibrate.

2. The automatic unloading device for a gantry crane grab bucket according to claim 1, characterized in that: The tapping mechanism includes: A fixed frame (16) is fixedly installed on one side of the grab claw (1), and the fixed frame (16) and the connecting piece (7) are located on the same side; The striking rod (17) is slidably mounted on the fixed frame (16), and one end of the striking rod (17) is in contact with one side of the connecting piece (7); An adjustment disc (18) is rotatably mounted on a fixed frame (16), and a toggle lever (20) is fixedly mounted on the surface of the adjustment disc (18). A reciprocating rod (21) is rotatably mounted on a fixed frame (16). One end of the reciprocating rod (21) meshes with the surface of the striking rod (17). The interior of the reciprocating rod (21) is slidably mounted with the outer surface of the actuating rod (20). When the adjustment disc (18) is rotated, the actuating lever (20) slides inside the reciprocating lever (21) so that the reciprocating lever (21) reciprocates to push the striking lever (17) to reciprocate.

3. The automatic unloading device for a gantry crane grab bucket according to claim 2, characterized in that: Also includes: The guide rod (24) is fixedly mounted on the grab claw (1), and the connecting piece (7) is slidably mounted inside the guide rod (24). A return spring (25) is sleeved on the guide rod (24), and the two ends of the return spring (25) abut against the surface of the guide rod (24) and the surface of the connecting piece (7), respectively. The drive motor (19) is fixedly mounted on the fixed frame (16), and the output end of the drive motor (19) is connected to the shaft end of the adjustment plate (18) for transmission.

4. The automatic unloading device for a gantry crane grab bucket according to claim 2, characterized in that: Also includes: A positioning through hole (22) is provided through the striking rod (17); The positioning piece (23) is fixedly mounted on the fixing frame (16), and the outer surface of the positioning piece (23) is slidably mounted inside the positioning through hole (22).

5. The automatic unloading device for a gantry crane grab bucket according to claim 1, characterized in that: The fixing structure (9) includes: The adjusting seat (91) is fixedly mounted on the connecting piece (7); An adjusting block (92) is slidably disposed inside an adjusting seat (91), and a fixing rod (93) is fixedly disposed at one end of the adjusting block (92). A fixed through hole (94) is provided through the connecting bolt (5). When one end of the fixing rod (93) is configured to pass through the fixed through hole (94), the protective cover (4) is limited. The docking seat (95) is fixedly mounted on the connecting piece (7), and one end of the fixing rod (93) is inserted into the docking seat (95).

6. The automatic unloading device for a gantry crane grab bucket according to claim 1, characterized in that: Also includes: A compression spring (10) is fixedly installed inside the adjusting seat (91), and one end of the compression spring (10) is fixedly installed on the surface of the adjusting block (92); A limiting through hole (11) is opened through both sides of the adjusting seat (91), and the adjusting block (92) is slidably disposed on both sides inside the limiting through hole (11).

7. The automatic unloading device for a gantry crane grab bucket according to claim 5, characterized in that: Also includes: The connecting plate (12) is fixedly installed on one side of the adjusting seat (91); The baffle (13) is slidably mounted on the connecting plate (12); A tension spring (14) is fixedly mounted on a connecting plate (12), and the other end of the tension spring (14) is fixed to a baffle (13); The limiting sleeve (15) is fixedly installed on the connecting plate (12), and the outer surface of the baffle (13) is slidably installed inside the limiting sleeve (15).

8. The automatic unloading device for a gantry crane grab bucket according to claim 5, characterized in that: Also includes: A square through hole (6) is formed through the grab claw (1), and the connecting bolt (5) is located inside the square through hole (6); A circular through hole (8) is formed through the connecting piece (7), and the connecting bolt (5) passes through the circular through hole (8).

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