A six-drum bridge grab unloader

Abstract

This invention relates to a six-drum bridge-type grab unloader, belonging to the technical field of unloaders. It includes a frame, on which a left frame and a right frame are slidably mounted. The left and right frames are fixedly connected. A set of lifting wheels and a set of opening / closing wheels are shared on the frame, left frame, and right frame. The lifting wheels are arranged in parallel, and the opening / closing wheels are located between the lifting wheels. A left lifting rope and a right lifting rope are wound around the lifting wheels. A left bucket is connected to the left lifting rope, and a right bucket is connected to the right lifting rope. A connecting assembly is shared on the left and right buckets, allowing them to rotate. A left and right opening / closing rope are wound around the opening / closing wheels, and both ropes are connected to the connecting assembly. This invention reduces grab bucket attitude adjustment time and improves the loading and unloading efficiency of the unloader.

Description

Technical Field

[0001] This invention relates to the field of ship unloading machine technology, and in particular to a six-drum bridge grab unloader. Background Technology

[0002] Bridge grab unloaders are important machines used in ports for loading and unloading bulk cargo. They are widely used in port loading and unloading operations and greatly improve the handling efficiency of bulk cargo.

[0003] Conventional bridge-type grab unloaders mainly adopt a four-drum differential design. However, in actual operation, the grab's attitude is prone to instability, especially during high-load, long-term continuous operation. Operators need to spend a lot of time adjusting the grab's attitude, which affects the unloader's operating efficiency. Summary of the Invention

[0004] In order to reduce the grab bucket attitude adjustment time and improve the loading and unloading efficiency of the ship unloader, this application provides a six-drum bridge grab unloader.

[0005] The present application provides a six-drum bridge-type grab unloader with the following technical solution.

[0006] A six-drum bridge-type grab unloader includes a frame, on which a left frame and a right frame are slidably mounted. The left frame and the right frame are fixedly connected. A set of lifting wheel assembly and a set of opening and closing wheel assembly are shared on the frame, the left frame, and the right frame. The lifting wheel assembly is arranged in parallel, and the opening and closing wheel assembly is located between the lifting wheel assemblies. A left lifting rope and a right lifting rope are wound around the lifting wheel assembly. A left bucket is connected to the left lifting rope, and a right bucket is connected to the right lifting rope. A connecting assembly is shared on the left and right buckets, which is used to rotatably connect the left and right buckets. A left opening and closing rope and a right opening and closing rope are wound around the opening and closing wheel assembly, and both the left and right opening and closing ropes are connected to the connecting assembly.

[0007] By adopting the above technical solution, the connecting components, left bucket, and right bucket together constitute a scissor grab. The left and right buckets are controlled to move synchronously by the synchronous lateral movement of the left and right frames. The left and right buckets are controlled to close by the left and right opening and closing ropes on the opening and closing wheel assembly. The left and right lifting ropes, left and right opening and closing ropes are coordinated to control the synchronous lifting and lowering of the left and right buckets by the hoisting wheel assembly and the opening and closing wheel assembly. Since one set of left lifting ropes is tied to the left bucket and one set of right lifting ropes is directly tied to the right bucket, the left and right lifting ropes together play a restraining and balancing role on the left and right buckets, improving the stability of the scissor grab operation, reducing the grab attitude adjustment time, and improving the loading and unloading efficiency of the ship unloader.

[0008] Preferably, a first hook and a third hook are fixedly installed on the side of the left bucket body away from the right bucket body. The first hook is located near the front side wall of the left bucket body, and the third hook is located near the rear side wall of the left bucket body. One of the left lifting ropes is connected to the first hook, and the other left lifting rope is connected to the third hook. The left lifting ropes are arranged in parallel. A second hook and a fourth hook are fixedly installed on the side of the right bucket body away from the left bucket body. The second hook is located near the front side wall of the right bucket body, and the fourth hook is located near the rear side wall of the right bucket body. One of the right lifting ropes is connected to the second hook, and the other right lifting rope is connected to the fourth hook. The right lifting ropes are arranged in parallel.

[0009] By adopting the above technical solution, a set of left lifting ropes is attached to the two corners of the left bucket body, and a set of right lifting ropes is attached to the two corners of the right bucket body. This makes the action points of the left and right lifting ropes as far apart as possible, improving the stability of the left and right bucket bodies and reducing the time required to adjust the grab's attitude.

[0010] Preferably, the left and right buckets are arranged opposite to each other, with the left bucket located below the left frame and the right bucket located below the right frame. The connecting assembly includes a left forearm, a left rear arm, a right forearm, a right rear arm, and a connecting shaft. The left forearm and left rear arm are both fixedly mounted on the right bucket. The left forearm and left rear arm are arranged parallel to each other. The right forearm and right rear arm are both fixedly mounted on the left bucket. The right forearm and right rear arm are arranged parallel to each other. The left forearm and right forearm are crossed. The left rear arm and right rear arm are crossed. The left forearm, left rear arm, right forearm, and right rear arm are all rotatably connected to the connecting shaft. The left opening and closing rope is fixedly connected to the left forearm, and the right opening and closing rope is fixedly connected to the right rear arm.

[0011] By adopting the above technical solution, the left forearm and the right forearm are arranged in a cross configuration, and the intersection of the left forearm and the right forearm is rotatably connected to the connecting shaft. The left rear arm and the right rear arm are also arranged in a cross configuration, and the intersection of the left rear arm and the right rear arm is rotatably connected to the connecting shaft, thereby allowing the left bucket body and the right bucket body to be rotatably connected together.

[0012] Preferably, the lifting wheel assembly includes a left lifting drum and a right lifting drum. The left lifting rope is wound on the left lifting drum, and the end of the left lifting rope away from the left bucket is fixedly connected to the left lifting drum. The right lifting rope is wound on the right lifting drum, and the end of the right lifting rope away from the right bucket is fixedly connected to the right lifting drum. The opening and closing wheel assembly includes a left opening and closing drum and a right opening and closing drum. The left opening and closing rope is wound on the left opening and closing drum, and the end of the left opening and closing rope away from the left forearm is fixedly connected to the left opening and closing drum. The right opening and closing rope is wound on the right opening and closing drum, and the end of the right opening and closing rope away from the right rear arm is fixedly connected to the right opening and closing drum.

[0013] Preferably, the left lifting drum, right lifting drum, left opening and closing drum, and right opening and closing drum are all rotatably mounted on the frame. The right lifting drum is located to the right of the left lifting drum, the right opening and closing drum is located to the right of the left opening and closing drum, and both the left and right opening and closing drums are located between the left and right lifting drums.

[0014] Preferably, the lifting wheel assembly further includes a left lifting guide wheel, a left lifting pulley, and a left lifting roller; the opening and closing wheel assembly further includes a left opening and closing guide wheel, a left opening and closing pulley, and a left opening and closing roller. The left lifting guide wheel, left lifting pulley, left opening and closing guide wheel, and left opening and closing pulley are all rotatably mounted on the frame. The left lifting guide wheel and the left opening and closing guide wheel are coaxially arranged. The left lifting guide wheel and the left opening and closing guide wheel are both located on the left frame away from the right frame. The left lifting pulley and the left opening and closing pulley are coaxially arranged. The left lifting pulley and the left opening and closing pulley are both located above the left frame and the right frame. The left lifting roller and the left opening and closing roller are both rotatably mounted on the left frame.

[0015] Preferably, the left lifting rope is wound from the left lifting drum toward the left bucket body along the left lifting pulley, the left lifting guide wheel, and the left lifting roller. A first upper pulley and a first lower pulley are rotatably mounted on the left forearm, with the first upper pulley located above the first lower pulley. A second upper pulley is rotatably mounted on the right forearm, with the second upper pulley and the first upper pulley symmetrically arranged on both sides of the connecting shaft. The left opening and closing rope is wound from the left opening and closing drum toward the left forearm along the left opening and closing pulley, the left opening and closing guide wheel, the left opening and closing roller, the first upper pulley, the first lower pulley, and the third upper pulley.

[0016] Preferably, the hoisting wheel assembly further includes a right hoisting guide wheel and a right hoisting roller, and the opening and closing wheel assembly further includes a right opening and closing guide wheel and a right opening and closing roller. The right hoisting guide wheel and the right opening and closing guide wheel are rotatably mounted on the frame, and the right hoisting roller and the right opening and closing roller are rotatably mounted on the right frame. The right hoisting guide wheel and the right opening and closing guide wheel are coaxially arranged. The right hoisting guide wheel is located on the side of the right hoisting drum away from the left hoisting drum, and the right opening and closing guide wheel is located on the side of the right opening and closing drum away from the left opening and closing drum. The left opening and closing roller and the right opening and closing roller are symmetrically arranged above the connecting shaft, and the left opening and closing roller and the right opening and closing roller are both located between the left hoisting roller and the right hoisting roller.

[0017] Preferably, the right lifting rope is wound from the right lifting drum toward the right bucket body along the right lifting guide wheel and the right lifting roller in sequence. A third upper pulley and a third lower pulley are rotatably arranged on the left rear arm, with the third upper pulley located above the third lower pulley. A fourth upper pulley is rotatably arranged on the right rear arm, with the fourth upper pulley and the third upper pulley symmetrically arranged on both sides of the connecting shaft. The right opening and closing rope is wound from the right opening and closing drum toward the right rear arm along the right opening and closing guide wheel, the right opening and closing roller, the fourth upper pulley, the third lower pulley, and the third upper pulley in sequence.

[0018] By adopting the above technical solution, and utilizing the arrangement of the lifting wheel assembly and the opening and closing wheel assembly, the left and right lifting ropes are symmetrically wound onto the trolley formed by the left and right frames, and the left and right opening and closing ropes are symmetrically wound onto the trolley formed by the left and right frames. At the same time, a set of left lifting ropes and left opening and closing ropes acting on the left bucket body together form a left-side triangular structure, and a set of right lifting ropes and right opening and closing ropes acting on the right bucket body together form a right-side triangular structure. The left and right triangular structures are symmetrically arranged on the grab bucket formed by the left and right bucket bodies, reducing the possibility of the grab bucket tilting.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up the frame, left frame, right frame, lifting wheel assembly, opening and closing wheel assembly, left lifting rope, right lifting rope, left bucket body, right bucket body, connecting components, left opening and closing rope and right opening and closing rope, the stability of the scissor grab bucket operation is improved, the grab bucket attitude adjustment time is reduced, and the loading and unloading efficiency of the ship unloader is improved. 2. By setting the left forearm, left rear arm, right forearm, right rear arm and connecting shaft, the left bucket body and right bucket body are rotatably connected; 3. By setting the first hook, second hook, third hook and fourth hook, the action points of the left lifting rope and the right lifting rope are made as far apart as possible, which improves the stability of the left bucket and the right bucket and reduces the time for adjusting the grab's attitude. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a six-drum bridge grab unloader structure in an embodiment of this application.

[0021] Figure 2 This is a schematic diagram illustrating the positional relationship between the first hook and the second hook in an embodiment of this application.

[0022] Figure 3 This is a schematic diagram illustrating the positional relationship between the third hook and the fourth hook in the embodiments of this application.

[0023] Figure 4 This is a cross-sectional view illustrating the positional relationship between the left and right lifting ropes in an embodiment of this application.

[0024] Figure 5 This is a cross-sectional view illustrating the positional relationship between the left and right opening / closing ropes in an embodiment of this application.

[0025] Figure 6 This is a cross-sectional view illustrating the connection between the left opening / closing rope and the left forearm in an embodiment of this application.

[0026] Figure 7 This is a cross-sectional view illustrating the connection between the right opening / closing rope and the right rear arm in an embodiment of this application.

[0027] Explanation of reference numerals in the attached diagram: 1. Frame; 11. Left frame; 12. Right frame; 2. Hoisting wheel assembly; 21. Left hoisting drum; 22. Left hoisting guide wheel; 23. Left hoisting pulley; 24. Left hoisting roller; 25. Right hoisting drum; 26. Right hoisting guide wheel; 27. Right hoisting roller; 3. Opening and closing wheel assembly; 31. Left opening and closing drum; 32. Left opening and closing guide wheel; 33. Left opening and closing pulley; 34. Left opening and closing roller; 35. Right opening and closing drum; 36. Right opening and closing guide wheel; 37. Right opening and closing roller; 4. Left bucket 41. Right bucket body; 41. Left lifting rope; 411. First hook; 412. Third hook; 5. Right bucket body; 51. Right lifting rope; 511. Second hook; 512. Fourth hook; 6. Connecting assembly; 61. Left forearm; 62. Right forearm; 63. Left rear arm; 64. Right rear arm; 65. Connecting shaft; 7. Left opening and closing rope; 71. First upper pulley; 72. First lower pulley; 73. Second upper pulley; 8. Right opening and closing rope; 81. Third upper pulley; 82. Third lower pulley; 83. Fourth upper pulley. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0029] This application discloses a six-drum bridge-type grab unloader. (Refer to...) Figure 1 The system includes a frame 1, on which a left frame 11 and a right frame 12 are slidably connected via guide rails. The left frame 11 and the right frame 12 are welded together. A left bucket 4 is suspended below the left frame 11, and a right bucket 5 is suspended below the right frame 12. The left bucket 4 and the right bucket 5 are positioned opposite each other. The left bucket 4 and the right bucket 5 are controlled to move synchronously by the synchronous lateral movement of the left frame 11 and the right frame 12. A connecting assembly 6 is installed on both the left bucket 4 and the right bucket 5. The connecting assembly 6 is used to rotatably connect the left bucket 4 and the right bucket 5. The connecting assembly 6, the left bucket 4, and the right bucket 5 together constitute a scissor grab bucket.

[0030] To enable the left bucket 4 and right bucket 5 to rotate and connect together, refer to Figures 1 to 3The connecting assembly 6 includes a left forearm 61, a left rear arm 63, a right forearm 62, a right rear arm 64, and a connecting shaft 65. The left forearm 61 and right forearm 62 are arranged crosswise, and the intersection point of the left forearm 61 and right forearm 62 is rotatably connected to the connecting shaft 65; the left rear arm 63 and right rear arm 64 are also arranged crosswise, and the intersection point of the left rear arm 63 and right rear arm 64 is rotatably connected to the connecting shaft 65. The left forearm 61 and left rear arm 63 are both welded to the right bucket body 5, and the left forearm 61 and left rear arm 63 are arranged parallel to each other; the right forearm 62 and right rear arm 64 are both welded to the left bucket body 4, and the right forearm 62 and right rear arm 64 are arranged parallel to each other.

[0031] refer to Figures 1 to 5 A set of lifting wheel assembly 2 and opening / closing wheel assembly 3 are jointly installed on the frame 1, left frame 11, and right frame 12. The lifting wheel assembly 2 is arranged in parallel, and the opening / closing wheel assembly 3 is located between the lifting wheel assemblies 2. A left opening / closing rope 7 and a right opening / closing rope 8 are wound around the opening / closing wheel assembly 3. The left opening / closing rope 7 is bolted to the left front arm 61, and the right opening / closing rope 8 is bolted to the right rear arm 64. The left opening / closing rope 7 and the right opening / closing rope 8 on the opening / closing wheel assembly 3 control the closure of the left bucket 4 and the right bucket 5. A left lifting rope 41 and a right lifting rope 51 are wound around the lifting wheel assembly 2. The left lifting rope 41 is arranged in parallel, and the right lifting rope 51 is arranged in parallel. The left lifting rope 41 is bolted to the left bucket 4, and the right lifting rope 51 is bolted to the right bucket 5. Using the lifting wheel assembly 2 and the opening and closing wheel assembly 3, the left lifting rope 41, the right lifting rope 51, the left opening and closing rope 7 and the right opening and closing rope 8 work together to control the left bucket 4 and the right bucket 5 to lift and lower synchronously.

[0032] refer to Figures 1 to 3 A first hook 411 and a third hook 412 are welded to the side of the left bucket body 4 away from the right bucket body 5. The first hook 411 is installed on a corner of the left bucket body 4 near the front side wall, and the third hook 412 is installed on a corner of the left bucket body 4 near the rear side wall. A second hook 511 and a fourth hook 512 are welded to the side of the right bucket body 5 away from the left bucket body 4. The second hook 511 is installed on a corner of the right bucket body 5 near the front side wall, and the fourth hook 512 is installed on a corner of the right bucket body 5 near the rear side wall. The first hook 411 and the second hook 511 are symmetrically arranged; the first hook 411 and the third hook 412 are symmetrically arranged; the third hook 412 and the fourth hook 512 are symmetrically arranged; the second hook 511 and the fourth hook 512 are symmetrically arranged. One left lifting rope 41 is connected to the first hook 411, and the other left lifting rope 41 is connected to the third hook 412; one right lifting rope 51 is connected to the second hook 511, and the other right lifting rope 51 is connected to the fourth hook 512. The action points of the left lifting rope 41 and the right lifting rope 51 are made as far apart as possible. The left lifting rope 41 and the right lifting rope 51 work together to restrain and balance the left bucket 4 and the right bucket 5, improve the stability of the left bucket 4 and the right bucket 5, reduce the time for adjusting the attitude of the grab bucket, and improve the loading and unloading efficiency of the unloader.

[0033] To achieve the lifting and lowering effect of the left bucket 4 and the right bucket 5, refer to Figures 1 to 4 The lifting wheel assembly 2 includes a left lifting drum 21, a left lifting guide wheel 22, a left lifting pulley 23, a left lifting roller 24, a right lifting drum 25, a right lifting guide wheel 26, and a right lifting roller 27. The left lifting drum 21, left lifting guide wheel 22, left lifting pulley 23, right lifting drum 25, and right lifting guide wheel 26 are all rotatably mounted on the frame 1. The left lifting roller 24 is rotatably mounted on the left frame 11, and the right lifting roller 27 is rotatably mounted on the right frame 12. The right lifting drum 25 is located to the right of the left lifting drum 21, and the left and right lifting drums 21 and 25 are arranged parallel to each other. The left lifting pulley 23 is located above the left frame 11 and the right frame 12. The left lifting guide wheel 22 is located on the left side of the left frame 11 away from the right frame 12, and the right lifting guide wheel 26 is located on the right lifting drum 25 away from the left lifting drum 21. The left lifting guide wheel 22 and the right lifting guide wheel 26 are arranged parallel to each other. The left lifting rope 41 is wound on the left lifting drum 21, and the end of the left lifting rope 41 away from the left bucket 4 is fixedly connected to the left lifting drum 21; the right lifting rope 51 is wound on the right lifting drum 25, and the end of the right lifting rope 51 away from the right bucket 5 is fixedly connected to the right lifting drum 25. Both the left lifting drum 21 and the right lifting drum 25 are driven by independent motors, so that the left lifting drum 21 can achieve the effect of winding and unwinding the left lifting rope 41, and the right lifting drum 25 can achieve the effect of winding and unwinding the right lifting rope 51. The left lifting rope 41 is wound from the left lifting drum 21 to the left bucket body 4 along the left lifting pulley 23, the left lifting guide wheel 22 and the left lifting roller 24 in sequence; the right lifting rope 51 is wound from the right lifting drum 25 to the right bucket body 5 along the right lifting guide wheel 26 and the right lifting roller 27 in sequence.

[0034] To achieve the effect of closing the left bucket body 4 and the right bucket body 5, refer to Figures 1 to 7The opening and closing wheel assembly 3 includes a left opening and closing drum 31, a left opening and closing guide wheel 32, a left opening and closing pulley 33, a left opening and closing roller 34, a right opening and closing drum 35, a right opening and closing guide wheel 36, and a right opening and closing roller 37. The left opening and closing drum 31, left opening and closing guide wheel 32, left opening and closing pulley 33, right opening and closing drum 35, and right opening and closing guide wheel 36 are all rotatably mounted on the frame 1. The left opening and closing roller 34 is rotatably mounted on the left frame 11, and the right opening and closing roller 37 is rotatably mounted on the right frame 12. The right opening and closing drum 35 is located to the right of the left opening and closing drum 31, and the left opening and closing drum 31 and the right opening and closing drum 35 are arranged parallel to each other. The left opening and closing pulley 33 is located above the left frame 11 and the right frame 12. The left opening / closing guide wheel 32 is located on the left frame 11 away from the right frame 12, and the right opening / closing guide wheel 36 is located on the right opening / closing drum 35 away from the left opening / closing drum 31. The left opening / closing guide wheel 32 and the right opening / closing guide wheel 36 are arranged parallel to each other. The left opening / closing rope 7 is wound on the left opening / closing drum 31, and the end of the left opening / closing rope 7 away from the left forearm 61 is fixedly connected to the left opening / closing drum 31; the right opening / closing rope 8 is wound on the right opening / closing drum 35, and the end of the right opening / closing rope 8 away from the right rear arm 64 is fixedly connected to the right opening / closing drum 35. Both the left opening / closing drum 31 and the right opening / closing drum 35 are driven by independent motors, so that the left opening / closing drum 31 can achieve the effect of winding and unwinding the left opening / closing rope 7, and the right opening / closing drum 35 can achieve the effect of winding and unwinding the right opening / closing rope 8.

[0035] refer to Figures 1 to 7A first upper pulley 71 and a first lower pulley 72 are rotatably mounted on the left forearm 61, with the first upper pulley 71 positioned above the first lower pulley 72. A third upper pulley 81 and a third lower pulley 82 are rotatably mounted on the left rear arm 63, with the third upper pulley 81 positioned above the third lower pulley 82. The first upper pulley 71 and the third upper pulley 81 are symmetrically positioned above the left bucket body 4, and the first lower pulley 72 and the third lower pulley 82 are symmetrically positioned above the left bucket body 4. A second upper pulley 73 is rotatably mounted on the right forearm 62, symmetrically positioned on both sides of the connecting shaft 65 along with the first upper pulley 71. A fourth upper pulley 83 is rotatably mounted on the right rear arm 64, symmetrically positioned on both sides of the connecting shaft 65 along with the third upper pulley 81. The second upper pulley 73 and the fourth upper pulley 83 are symmetrically positioned above the right bucket body 5. The left opening / closing rope 7 is wound from the left opening / closing drum 31 towards the left forearm 61, sequentially along the left opening / closing pulley 33, the left opening / closing guide wheel 32, the left opening / closing roller 34, the first upper pulley 71, the first lower pulley 72, and the third upper pulley 81. The right opening / closing rope 8 is wound from the right opening / closing drum 35 towards the right rear arm 64, sequentially along the right opening / closing guide wheel 36, the right opening / closing roller 37, the fourth upper pulley 83, the third lower pulley 82, and the third upper pulley 81. When the right bucket body 5 and the left bucket body 4 are closed, the left opening / closing drum 31 winds up the left opening / closing rope 7, and the right opening / closing drum 35 winds up the right opening / closing rope 8. The left opening / closing rope 7 pulls the top of the left forearm 61 towards the top of the right forearm 62, and the right opening / closing rope 8 pulls the top of the right rear arm 64 towards the top of the left rear arm 63, thereby bringing the right bucket body 5 and the left bucket body 4 closer together to achieve closure.

[0036] refer to Figures 1 to 5 The left opening and closing drum 31 and the right opening and closing drum 35 are both located between the left lifting drum 21 and the right lifting drum 25. The left lifting guide wheel 22 and the left opening and closing guide wheel 32 are coaxially arranged. The left lifting pulley 23 and the left opening and closing pulley 33 are coaxially arranged. The right lifting guide wheel 26 and the right opening and closing guide wheel 36 are coaxially arranged.

[0037] refer to Figures 1 to 5The left and right opening / closing rollers 34 and 37 are symmetrically arranged above the connecting shaft 65, as are the left and right lifting rollers 24 and 27. The left and right opening / closing rollers 34 and 37 are both located between the left and right lifting rollers 24 and 27. One left opening / closing roller 34, one right opening / closing roller 37, two left lifting rollers 24, and two right lifting rollers 27 are arranged in two apex triangles, causing the left lifting rope 41 and right lifting rope 51 to be symmetrically wound onto the trolley formed by the left and right frames 4 and 5, respectively. Similarly, the left and right opening / closing ropes 7 and 8 are symmetrically wound onto the trolley formed by the left and right frames 4 and 5. When the left bucket 4 and right bucket 5 are closed, the left and right lifting ropes 41, 51, 7, and 8 are in a vertical position. A set of left lifting ropes 41 and left opening / closing ropes 7 acting on the left bucket 4 together form a left inverted triangle structure, and a set of right lifting ropes 51 and right opening / closing ropes 8 acting on the right bucket 5 together form a right inverted triangle structure. The left and right triangle structures are symmetrically set on the grab formed by the left bucket 4 and the right bucket 5. The inverted triangle structure formed by them improves the stability of the grab and reduces the occurrence of grab tilting.

[0038] The implementation principle of a six-drum bridge-type grab unloader according to an embodiment of this application is as follows: The left bucket 4 and right bucket 5 are controlled to move synchronously laterally by the synchronous lateral movement of the left frame 11 and right frame 12. The left and right buckets 4 and 5 are closed by the left and right opening / closing ropes 7 and 8 on the opening / closing wheel assembly 3. The left and right lifting ropes 41 and 51 on the lifting wheel assembly 2 are controlled to raise and lower synchronously. The left lifting rope 41, bolted to the left bucket 4, and the right lifting rope 51, bolted to the right bucket 5, together provide a restraining and balancing effect on the left and right buckets 4 and 5, improving their stability, reducing the grab bucket attitude adjustment time, and increasing the unloading efficiency of the unloader.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A six-drum bridge-type grab unloader, comprising a frame, characterized in that: A left frame and a right frame are slidably mounted on the frame. The left frame and the right frame are fixedly connected. A set of lifting wheel assembly and opening / closing wheel assembly are jointly mounted on the frame, the left frame, and the right frame. The lifting wheel assembly is arranged in parallel. The opening / closing wheel assembly is located between the lifting wheel assemblies. A left lifting rope and a right lifting rope are wound around the lifting wheel assembly. The left lifting rope is jointly fastened to the left bucket, and the right lifting rope is jointly fastened to the right bucket. A connecting component is jointly mounted on the left bucket and the right bucket. The connecting component is used to rotatably connect the left bucket and the right bucket. A left opening / closing rope and a right opening / closing rope are wound around the opening / closing wheel assembly. Both the left opening / closing rope and the right opening / closing rope are fastened to the connecting component. The left and right buckets are arranged opposite each other, with the left bucket located below the left frame and the right bucket located below the right frame. The connecting assembly includes a left forearm, a left rear arm, a right forearm, a right rear arm, and a connecting shaft. The left forearm and left rear arm are both fixedly mounted on the right bucket. The left forearm and left rear arm are arranged parallel to each other. The right forearm and right rear arm are both fixedly mounted on the left bucket. The right forearm and right rear arm are arranged parallel to each other. The left forearm and right forearm are crossed. The left rear arm and right rear arm are crossed. The left forearm, left rear arm, right forearm, and right rear arm are all rotatably connected to the connecting shaft. The left opening and closing rope is fixedly connected to the left forearm, and the right opening and closing rope is fixedly connected to the right rear arm. The lifting wheel assembly includes a left lifting drum and a right lifting drum. The left lifting rope is wound on the left lifting drum, and the end of the left lifting rope away from the left bucket is fixedly connected to the left lifting drum. The right lifting rope is wound on the right lifting drum, and the end of the right lifting rope away from the right bucket is fixedly connected to the right lifting drum. The opening and closing wheel assembly includes a left opening and closing drum and a right opening and closing drum. The left opening and closing rope is wound on the left opening and closing drum, and the end of the left opening and closing rope away from the left forearm is fixedly connected to the left opening and closing drum. The right opening and closing rope is wound on the right opening and closing drum, and the end of the right opening and closing rope away from the right rear arm is fixedly connected to the right opening and closing drum. The left lifting drum, right lifting drum, left opening and closing drum, and right opening and closing drum are all rotatably mounted on the frame. The right lifting drum is located to the right of the left lifting drum, and the right opening and closing drum is located to the right of the left opening and closing drum. The left opening and closing drum and the right opening and closing drum are both located between the left lifting drum and the right lifting drum.

2. The six-drum bridge-type grab unloader according to claim 1, characterized in that: A first hook and a third hook are fixedly installed on the left bucket body away from the right bucket body. The first hook is located near the front side wall of the left bucket body, and the third hook is located near the rear side wall of the left bucket body. One of the left lifting ropes is connected to the first hook, and the other left lifting rope is connected to the third hook. The left lifting ropes are arranged in parallel. A second hook and a fourth hook are fixedly installed on the right bucket body away from the left bucket body. The second hook is located near the front side wall of the right bucket body, and the fourth hook is located near the rear side wall of the right bucket body. One of the right lifting ropes is connected to the second hook, and the other right lifting rope is connected to the fourth hook. The right lifting ropes are arranged in parallel.

3. The six-drum bridge-type grab unloader according to claim 1, characterized in that: The lifting wheel assembly further includes a left lifting guide wheel, a left lifting pulley, and a left lifting roller. The opening and closing wheel assembly further includes a left opening and closing guide wheel, a left opening and closing pulley, and a left opening and closing roller. The left lifting guide wheel, left lifting pulley, left opening and closing guide wheel, and left opening and closing pulley are all rotatably mounted on the frame. The left lifting guide wheel and the left opening and closing guide wheel are coaxially arranged. The left lifting guide wheel and the left opening and closing guide wheel are both located on the left frame away from the right frame. The left lifting pulley and the left opening and closing pulley are coaxially arranged. The left lifting pulley and the left opening and closing pulley are both located above the left frame and the right frame. The left lifting roller and the left opening and closing roller are rotatably mounted on the left frame.

4. A six-drum bridge-type grab unloader according to claim 3, characterized in that: The left lifting rope is wound from the left lifting drum toward the left bucket body along the left lifting pulley, the left lifting guide wheel, and the left lifting roller in sequence. A first upper pulley and a first lower pulley are rotatably mounted on the left forearm, with the first upper pulley located above the first lower pulley. A second upper pulley is rotatably mounted on the right forearm, with the second upper pulley and the first upper pulley symmetrically arranged on both sides of the connecting shaft. The left opening and closing rope is wound from the left opening and closing drum toward the left forearm along the left opening and closing pulley, the left opening and closing guide wheel, the left opening and closing roller, the first upper pulley, the first lower pulley, and the third upper pulley in sequence.

5. A six-drum bridge-type grab unloader according to claim 3, characterized in that: The hoisting wheel assembly also includes a right hoisting guide wheel and a right hoisting roller, and the opening and closing wheel assembly also includes a right opening and closing guide wheel and a right opening and closing roller. The right hoisting guide wheel and the right opening and closing guide wheel are rotatably mounted on the frame, and the right hoisting roller and the right opening and closing roller are rotatably mounted on the right frame. The right hoisting guide wheel and the right opening and closing guide wheel are coaxially arranged. The right hoisting guide wheel is located on the side of the right hoisting drum away from the left hoisting drum, and the right opening and closing guide wheel is located on the side of the right opening and closing drum away from the left opening and closing drum. The left opening and closing roller and the right opening and closing roller are symmetrically arranged above the connecting shaft, and the left opening and closing roller and the right opening and closing roller are both located between the left hoisting roller and the right hoisting roller.

6. A six-drum bridge-type grab unloader according to claim 5, characterized in that: The right lifting rope is wound from the right lifting drum toward the right bucket body along the right lifting guide wheel and the right lifting roller in sequence. A third upper pulley and a third lower pulley are rotatably mounted on the left rear arm. The third upper pulley is located above the third lower pulley. A fourth upper pulley is rotatably mounted on the right rear arm. The fourth upper pulley and the third upper pulley are symmetrically arranged on both sides of the connecting shaft. The right opening and closing rope is wound from the right opening and closing drum toward the right rear arm along the right opening and closing guide wheel, the right opening and closing roller, the fourth upper pulley, the third lower pulley, and the third upper pulley in sequence.

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