Conveying member for construction machinery

Abstract

The invention relates to the technical field of conveying chains, in particular to a conveying component for engineering machinery, which comprises inner chain plates and outer chain plates, the inner chain plates and the outer chain plates are respectively arranged in pairs, each pair is arranged in a symmetrical structure, the outer chain plates are arranged on the outer sides of the inner chain plates, and inner holes are formed in the two sides of each inner chain plate. A connecting assembly convenient to disassemble and assemble is arranged between each pair of inner chain plates, the connecting assemblies are sleeved with outer sleeves, and oil adding assemblies are arranged in the connecting assemblies. Due to the fact that the connecting assembly convenient to disassemble and assemble is arranged, when some sections in the conveying chain are damaged, the damaged parts can be replaced, the whole chain does not need to be scrapped completely, more cost is saved, due to the fact that the oil adding assembly is arranged, lubricating oil can be added into the conveying chain from the interior of the conveying chain, lubrication is more thorough, and the service life of the conveying chain is prolonged. The lubricating effect is good, and the service life of the conveying chain is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of conveyor chains, and specifically to a conveying component for construction machinery. Background Art

[0002] A chain is composed of parts such as chain plates, pins, rollers, and sleeves. A conveyor chain is based on a load-bearing chain, and higher load-bearing roller attachments are added between each section to carry goods. The chain slides on the track by rolling of the rollers. Since the rollers on the chain are in rolling contact with the track, the frictional resistance is small, the power loss is low, and it can carry a heavier load, making the conveyor chain widely used.

[0003] In some engineering construction sites, the loss of the conveyor chain is higher than that in other scenarios, such as mines, offshore construction areas, etc. For those large conveyor chains, if some sections of the chain are worn, they cannot be used normally. The existing treatment method is to replace the entire chain, but the parts that are not damaged will be idle or scrapped, which will cause great waste. And during the use of the chain, lubricating oil needs to be added for lubrication to protect the chain. However, currently, most chains are adhered to the chain surface with high-viscosity lubricating oil or grease. Although it can lubricate the chain teeth and the chain surface, it can hardly penetrate into the chain pins, bushings, and drums, resulting in poor lubrication effect and aggravating the wear of the chain. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a conveying component for construction machinery to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A conveying component for construction machinery includes inner chain plates and outer chain plates. The inner chain plates and the outer chain plates are respectively arranged in pairs and each pair is arranged symmetrically. The outer chain plates are arranged outside the inner chain plates. Inner holes are opened on both sides of the inner chain plates. A detachable connection component is arranged between each pair of the inner chain plates. An outer sleeve is sleeved outside the connection component. An oil adding component is arranged inside the connection component.

[0006] Preferably, a number of positioning holes are opened inside the inner holes.

[0007] Preferably, the connection component includes an inner sleeve. The two ends of the inner sleeve are respectively inserted into the inner holes at the ends of the inner chain plates on both sides. Circular holes are opened at the ends of the inner sleeve, and the circular holes are aligned with the positioning holes. One installation block is arranged at each of the two ends inside the inner sleeve. A number of fixing components for fixing the inner sleeve are installed inside the installation blocks.

[0008] Preferably, the connecting component further includes a pin shaft. The pin shaft passes through the inner link plate and the outer link plate and is inserted into the mounting block. The pin shaft includes a first docking shaft and a second docking shaft. A threaded column is rotatably installed inside the first docking shaft. A threaded hole is provided at the inner end of the second docking shaft. The threaded column is screwed into the threaded hole. Both the first docking shaft and the second docking shaft are composed of a disc and a cylinder. The disc fits against the outer wall of the outer link plate. The part of the cylinder inserted into the middle of the inner sleeve is a thin section, and the rest is a thick section.

[0009] Preferably, the fixing component includes a movable block movably arranged inside the mounting block. One end of the movable block is connected with a positioning convex column. The positioning convex column passes through the side wall of the mounting block and corresponds to the circular hole and the positioning hole at the end of the inner sleeve. The other end of the movable block is connected with a return spring for pulling the movable block towards the inside of the mounting block. A side tooth plate is installed on the side wall of the movable block. A winding wheel is rotatably installed beside the movable block. The winding wheel is connected with a gear. The gear is meshed and connected with the side tooth plate. A traction wire is wound on the winding wheel. The traction wire is connected with a movable piece. The movable piece is located at the inner end face of the mounting block. The thin sections on the cylindrical parts of the first docking shaft and the second docking shaft pass through the movable piece. A plurality of retaining pieces are arranged on the end face of the central circular hole of the movable piece. The thick sections on the cylindrical parts of the first docking shaft and the second docking shaft abut against the retaining pieces. Insert the two ends of the inner sleeve into the inner holes of the two inner link plates and align the circular hole and the positioning hole. Use the first docking shaft and the second docking shaft to insert from both sides respectively. By rotating the threaded column to screw it into the threaded hole, the first docking shaft and the second docking shaft are made to approach each other. The thick short parts abut against the retaining pieces, which can push the movable piece towards the middle, thereby pulling the traction wire to make the winding wheel rotate. When the winding wheel rotates to drive the gear to rotate, because the gear is meshed and connected with the side tooth plate, the side tooth plate can drive the movable block to move towards the outside of the mounting block, and then the positioning convex column moves outwards. The positioning convex column passes through the circular hole at the end of the inner sleeve and inserts into the positioning hole, and the inner sleeve and the inner link plate can be fixedly connected.

[0010] Preferably, a hexagonal groove is provided on the outer end face of the threaded column. A dynamic sealing ring is provided at the outer end of the connection between the threaded column and the disc of the first docking shaft to prevent dust and other impurities from entering. A hexagonal groove is also provided in the middle of the outer end face of the second docking shaft. When connecting the first docking shaft and the second docking shaft, two inner hexagon wrenches can be inserted into the hexagonal grooves for rotation connection.

[0011] Preferably, an outer overflow groove is provided on the outer side wall of the inner sleeve. An overflow hole is provided at the center of the outer overflow groove. The overflow hole penetrates through the inner sleeve.

[0012] Preferably, inner overflow grooves are provided on the side walls of the thick sections of the first docking shaft and the second docking shaft and on the inner end faces of the discs.

[0013] Preferably, the number of the outer overflow grooves is not less than six.

[0014] Preferably, the number of the inner overflow grooves is not less than six.

[0015] Preferably, the oil adding assembly includes an inner connecting ring. There are two inner connecting rings symmetrically arranged. The inner connecting rings are connected to the side wall of the movable piece through several connecting columns. An active pushing ring is embedded and movably arranged on the opposite surfaces of the two inner connecting rings. A lubricating oil storage structure is arranged inside the active pushing ring, which can be a cavity for storing lubricating oil or a flexible liquid storage bladder and other structures. An extension plate is arranged on the other surface of the inner connecting ring. The extension plate is staggered with the baffle. The extension plate abuts against the connection part of the thin section and the thick section. A second oil outlet is opened at the end of the extension plate and is communicated with the lubricating oil storage structure. A side ring is arranged on the side wall of the inner connecting ring. A first oil outlet is opened on the outer side wall of the side ring. The first oil outlet is communicated with the lubricating oil storage structure. When installing the equipment to connect the first docking shaft and the second docking shaft, since the first docking shaft and the second docking shaft push the movable pieces on both sides to move, the inner connecting rings on both sides are close to each other. When the inner connecting rings on both sides are attached together, the two active pushing rings are mutually extruded, so that the lubricating oil stored inside the lubricating oil storage structure is extruded. The lubricating oil overflows from the second oil outlet and the first oil outlet respectively. The lubricating oil overflowing from the second oil outlet can enter the inner overflow groove to lubricate the pin shaft and its contact connection parts. The lubricating oil overflowing from the first oil outlet enters the outer overflow groove through the overflow hole to lubricate between the inner sleeve and the outer sleeve.

[0016] Preferably, the first oil outlet is aligned with the overflow hole.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. For the conveying component for construction machinery proposed by the present invention, because of the connection component which is convenient for disassembly and assembly, when some links in the conveying chain are damaged, the damaged part can be replaced, and it is not necessary to scrap the whole chain, which saves more cost. And because of the oil adding assembly, lubricating oil can be added to the conveying chain from the inside, the lubrication is more thorough, the lubrication effect is good, and the service life of the conveying chain is prolonged.

[0018] 2. When it is necessary to disassemble, repair, or replace a certain link of the chain, use an Allen wrench to disassemble the first docking shaft and the second docking shaft, then the inner link plate and the outer link plate can be separated. Then, under the pulling force of the return spring, the movable block retracts, and thus the positioning convex post is withdrawn from the positioning hole, and the inner sleeve can be removed from the inner hole. When installing, insert both ends of the inner sleeve into the inner holes of the two inner link plates, align the round hole and the positioning hole, and align the inner link plate and the outer link plate. Insert the first docking shaft and the second docking shaft from both sides respectively, and by rotating the threaded column to thread it into the threaded hole, the first docking shaft and the second docking shaft are brought closer. When the short and thick part abuts against the retaining piece, the movable piece can be pushed towards the middle, thereby pulling the traction wire to make the winding wheel rotate. When the winding wheel rotates to drive the gear to rotate, since the gear is meshed and connected with the side tooth plate, the side tooth plate can drive the movable block to move towards the outside of the mounting block, and thus the positioning convex post moves outwards. The positioning convex post passes through the round hole at the end of the inner sleeve and inserts into the positioning hole, so that the inner sleeve and the inner link plate can be fixedly connected, and then the damaged part can be replaced.

[0019] 3. When installing the equipment and connecting the first docking shaft and the second docking shaft, since the first docking shaft and the second docking shaft push the movable pieces on both sides to move, the inner connecting rings on both sides are brought closer. When the inner connecting rings on both sides are in contact with each other, the two movable push rings squeeze each other, so that the lubricating oil stored inside the oil storage structure is extruded. The lubricating oil overflows from the second oil outlet hole and the first oil outlet hole respectively. The lubricating oil overflowing from the second oil outlet hole can enter the inner overflow groove to lubricate the pin shaft and the parts in contact connection therewith. The lubricating oil overflowing from the first oil outlet hole enters the outer overflow groove through the overflow hole, which can lubricate between the inner sleeve and the outer sleeve. Adding lubricating oil for lubrication from the inside makes the lubrication effect more thorough. Brief Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a single link of the conveyor chain of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the inside of the outer sleeve 3 of the present invention.

[0022] Figure 3 It is a schematic structural diagram of the inside of the inner sleeve 5 of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the connection structure of the pin shaft 6 of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the mounting block 9 of the present invention.

[0025] Figure 6 It is a schematic structural diagram of the fixing component of the present invention.

[0026] Figure 7Schematic diagram of the connection structure of the movable block 10 of the present invention.

[0027] Figure 8 Schematic diagram of the structure of the first docking shaft 601 of the present invention.

[0028] Figure 9 Schematic diagram of the structure of the second docking shaft 602 of the present invention.

[0029] Figure 10 Schematic diagram of the oil adding assembly of the present invention.

[0030] Figure 11 is Figure 10 another perspective view of the structure in

[0031] In the figure: inner link plate 1, outer link plate 2, outer sleeve 3, inner hole 4, inner sleeve 5, pin shaft 6, first docking shaft 601, second docking shaft 602, inner overflow groove 603, threaded post 604, threaded hole 605, outer overflow groove 7, overflow hole 8, mounting block 9, movable block 10, positioning convex column 11, positioning hole 12, return spring 13, side tooth plate 14, winding wheel 15, gear 16, traction wire 17, movable piece 18, retaining piece 19, inner connection ring 20, connection column 21, movable push ring 22, side ring 23, first oil outlet hole 24, extension plate 25, second oil outlet hole 26. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 to 11, the present invention provides a technical solution: a conveying member for construction machinery, including inner link plates 1 and outer link plates 2. The inner link plates 1 and the outer link plates 2 are respectively arranged in pairs and each pair is arranged in a symmetric structure. The outer link plates 2 are arranged on the outside of the inner link plates 1. Inner holes 4 are opened on both sides of the inner link plates 1, and a number of positioning holes 12 are opened inside the inner holes 4. A connection assembly for facilitating disassembly and assembly is arranged between each pair of the inner link plates 1. The connection assembly includes an inner sleeve 5. The two ends of the inner sleeve 5 are respectively inserted into the inner holes 4 at the ends of the inner link plates 1 on both sides. A circular hole is opened at the end of the inner sleeve 5, and the circular hole is aligned with the positioning hole 12. At both ends inside the inner sleeve 5, there is an installation block 9 each. The installation block 9 is a structure assembled by welding, and there is a cavity inside for installing required accessories. A number of fixing components for fixing the inner sleeve 5 are installed inside the installation block 9. The fixing component includes a movable block 10 movably arranged inside the installation block 9. One end of the movable block 10 is connected with a positioning convex column 11. The positioning convex column 11 passes through the side wall of the installation block 9 and corresponds to the circular hole and the positioning hole 12 at the end of the inner sleeve 5. The other end of the movable block 10 is connected with a return spring 13. The return spring 13 is used to pull the movable block 10 towards the inside of the installation block 9. A side tooth plate 14 is installed on the side wall of the movable block 10. A winding wheel 15 is rotatably installed beside the movable block 10. The winding wheel 15 is connected with a gear 16. The gear 16 is meshed and connected with the side tooth plate 14. A traction wire 17 is wound on the winding wheel 15. The traction wire 17 is connected with a movable piece 18. The movable piece 18 is located at the inner end face of the installation block 9. The thin sections on the cylindrical parts of the first docking shaft 601 and the second docking shaft 602 pass through the movable piece 18. A number of blocking pieces 19 are arranged on the end face of the central circular hole of the movable piece 18. The thick sections on the cylindrical parts of the first docking shaft 601 and the second docking shaft 602 abut against the blocking pieces 19. The connection assembly also includes a pin shaft 6. The pin shaft 6 passes through the inner link plates 1 and the outer link plates 2 and is inserted into the installation block 9. The pin shaft 6 includes a first docking shaft 601 and a second docking shaft 602. A threaded column 604 is rotatably installed inside the first docking shaft 601. A threaded hole 605 is opened at the inner end of the second docking shaft 602. The threaded column 604 is screwed into the threaded hole 605. Both the first docking shaft 601 and the second docking shaft 602 are composed of a disc and a cylinder. The disc fits on the outer wall of the outer link plate 2. The part of the cylinder inserted into the middle of the inner sleeve 5 is a thin section, and the rest is a thick section. A hexagonal groove is opened on the outer end face of the threaded column 604. A dynamic seal ring is arranged at the outer end of the connection between the threaded column 604 and the disc of the first docking shaft 601 to prevent dust and other impurities from entering. A hexagonal groove is also opened in the middle of the outer end face of the second docking shaft 602. When connecting the first docking shaft 601 and the second docking shaft 602, two inner hexagon wrenches can be inserted into the hexagonal grooves for rotation and connection.

[0034] Insert both ends of the inner sleeve 5 into the inner holes 4 of the two inner link plates 1 and align the round holes with the positioning holes 12. Insert the first docking shaft 601 and the second docking shaft 602 from both sides respectively. By rotating the threaded column 604, screw it into the threaded hole 605, so that the first docking shaft 601 and the second docking shaft 602 approach each other. When the thick and short parts abut against the baffle 19, the movable piece 18 can be pushed towards the middle, thereby pulling the traction wire 17 to make the winding wheel 15 rotate. When the winding wheel 15 rotates to drive the gear 16 to rotate, since the gear 16 is meshed and connected with the side tooth plate 14, the side tooth plate 14 can drive the movable block 10 to move outward from the mounting block 9, and then the positioning convex column 11 moves outward. The positioning convex column 11 passes through the round hole at the end of the inner sleeve 5 and inserts into the positioning hole 12, so that the inner sleeve 5 and the inner link plate 1 can be fixedly connected.

[0035] External overflow grooves 7 are provided on the outer side wall of the inner sleeve 5. The number of the external overflow grooves 7 is not less than six. An overflow hole 8 is provided at the center of the external overflow groove 7. The overflow hole 8 penetrates the inner sleeve 5. Inner overflow grooves 603 are provided on the thick side walls of the first docking shaft 601 and the second docking shaft 602 and on the inner end faces of the discs. The number of the inner overflow grooves 603 is not less than six.

[0036] An outer sleeve 3 is sleeved outside the connection assembly. An oil adding assembly is arranged inside the connection assembly. The oil adding assembly includes two symmetrically arranged inner connection rings 20. The inner connection rings 20 are connected to the side wall of the movable piece 18 by several connecting columns 21. Movable push rings 22 are embedded and movably arranged on the opposite faces of the two inner connection rings 20. A lubricating oil storage structure is arranged inside the movable push rings 22, which can be a cavity for storing oil or an elastic liquid storage bag and other structures. An extension plate 25 is arranged on the other face of the inner connection ring 20. The extension plate 25 is staggered with the baffle 19. The extension plate 25 abuts against the connection part of the thin section and the thick section. A second oil outlet hole 26 communicated with the lubricating oil storage structure is provided at the end of the extension plate 25. A side ring 23 is arranged on the side wall of the inner connection ring 20. A first oil outlet hole 24 is provided on the outer side wall of the side ring 23. The first oil outlet hole 24 is communicated with the lubricating oil storage structure. The first oil outlet hole 24 is aligned with the overflow hole 8. When the installation equipment connects the first docking shaft 601 and the second docking shaft 602, since the first docking shaft 601 and the second docking shaft 602 push the movable pieces 18 on both sides to move, the two inner connection rings 20 on both sides approach each other. When the two inner connection rings 20 fit together, the two movable push rings 22 are mutually extruded, so that the lubricating oil stored inside the lubricating oil storage structure is extruded. The lubricating oil overflows from the second oil outlet hole 26 and the first oil outlet hole 24 respectively. The lubricating oil overflowing from the second oil outlet hole 26 can enter the inner overflow groove 603 to lubricate the pin shaft 6 and its contact-connected parts. The lubricating oil overflowing from the first oil outlet hole 24 enters the external overflow groove 7 through the overflow hole 8, and can lubricate between the inner sleeve 5 and the outer sleeve 3.

[0037] When it is necessary to disassemble, repair and replace a certain link of the chain, use an Allen wrench to disassemble the first docking shaft 601 and the second docking shaft 602, then the inner link plate 1 and the outer link plate 2 can be separated. Then, under the elastic pull of the return spring 13, the movable block 10 retracts, and then the positioning convex column 11 is pulled out from the positioning hole 12, and the inner sleeve 5 can be removed from the inner hole 4. Then, during installation, insert both ends of the inner sleeve 5 into the inner holes 4 of the two inner link plates 1, align the round hole and the positioning hole 12, and align the inner link plate 1 and the outer link plate 2. Use the first docking shaft 601 and the second docking shaft 602 to insert from both sides respectively. By rotating the threaded column 604 to thread it into the threaded hole 605, the first docking shaft 601 and the second docking shaft 602 are brought closer. When the short and thick part abuts against the retaining piece 19, the movable piece 18 can be pushed towards the middle, thereby pulling the traction wire 17 to make the winding wheel 15 rotate. When the winding wheel 15 rotates to drive the gear 16 to rotate, because the gear 16 is meshed and connected with the side tooth plate 14, the side tooth plate 14 can drive the movable block 10 to move towards the outside of the mounting block 9, and then the positioning convex column 11 moves outwards. The positioning convex column 11 passes through the round hole at the end of the inner sleeve 5 and inserts into the positioning hole 12, and the inner sleeve 5 and the inner link plate 1 can be fixedly connected, and then the damaged part can be replaced. When installing the device and connecting the first docking shaft 601 and the second docking shaft 602, since the first docking shaft 601 and the second docking shaft 602 push the movable pieces 18 on both sides to move, the inner connecting rings 20 on both sides are brought closer. When the inner connecting rings 20 on both sides are fitted together, the two movable push rings 22 are mutually extruded, so that the lubricating oil stored inside the oil storage structure is squeezed out. The lubricating oil overflows from the second oil outlet hole 26 and the first oil outlet hole 24 respectively. The lubricating oil overflowing from the second oil outlet hole 26 can enter the inner overflow groove 603 for lubricating the pin shaft 6 and its contact-connected parts. The lubricating oil overflowing from the first oil outlet hole 24 enters the outer overflow groove 7 through the overflow hole 8, and can lubricate between the inner sleeve 5 and the outer sleeve 3. Adding lubricating oil for lubrication from the inside makes the lubrication effect more thorough.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A conveying member for construction machinery, comprising inner link plates and outer link plates, the inner link plates and the outer link plates are respectively arranged in pairs and each pair is arranged in a symmetrical structure, the outer link plates are arranged on the outer sides of the inner link plates, inner holes are formed on both sides of the inner link plates, and it is characterized in that: A connection component facilitating disassembly and assembly is arranged between each pair of the inner link plates. An outer sleeve is sleeved outside the connection component, and an oil adding component is arranged inside the connection component.

2. The conveying member for construction machinery according to claim 1, wherein: A plurality of positioning holes are formed inside the inner hole.

3. The conveying member for construction machinery according to claim 1, wherein: The connection component includes an inner sleeve. The two ends of the inner sleeve are respectively inserted into the inner holes at the ends of the two side inner link plates. Circular holes are formed at the ends of the inner sleeve, and the circular holes are aligned with the positioning holes. One installation block is arranged at each of the two ends inside the inner sleeve. A plurality of groups of fixing components for fixing the inner sleeve are installed inside the installation block.

4. The conveying member for construction machinery according to claim 1, characterized in that: The connection component further includes a pin shaft. The pin shaft passes through the inner link plate and the outer link plate and is inserted into the installation block. The pin shaft includes a first docking shaft and a second docking shaft. A threaded column is rotatably installed inside the first docking shaft. A threaded hole is formed at the inner end of the second docking shaft, and the threaded column is screwed into the threaded hole. Both the first docking shaft and the second docking shaft are composed of a disc and a cylinder. The disc is attached to the outer wall of the outer link plate. The part of the cylinder of the first docking shaft and the second docking shaft inserted into the middle of the inner sleeve is a thin section, and the rest is a thick section.

5. The conveying member for construction machinery according to claim 3, characterized in that: The fixing component includes a movable block movably arranged inside the installation block. One end of the movable block is connected with a positioning convex column. The positioning convex column penetrates out of the side wall of the installation block and corresponds to the circular hole and the positioning hole at the end of the inner sleeve. The other end of the movable block is connected with a return spring for pulling the movable block towards the inside of the installation block. A side tooth plate is installed on the side wall of the movable block. A winding wheel is rotatably installed beside the movable block. The winding wheel is connected with a gear, and the gear is meshed and connected with the side tooth plate. A traction wire is wound on the winding wheel. The traction wire is connected with a movable piece. The movable piece is located at the inner end face of the installation block. The thin sections on the cylindrical parts of the first docking shaft and the second docking shaft pass through the movable piece. A plurality of blocking pieces are arranged on the end face of the central circular hole of the movable piece. The thick sections on the cylindrical parts of the first docking shaft and the second docking shaft abut against the blocking pieces.

6. The conveying member for construction machinery according to claim 4, characterized in that: A hexagonal groove is formed on the outer end face of the threaded column. A dynamic sealing ring is arranged at the outer end of the connection between the threaded column and the disc of the first docking shaft. A hexagonal groove is also formed in the middle of the outer end face of the second docking shaft.

7. The conveying member for construction machinery according to claim 3, characterized in that: An outer overflow groove is formed on the outer side wall of the inner sleeve. An overflow hole is formed at the center of the outer overflow groove, and the overflow hole penetrates through the inner sleeve.

8. The conveying member for construction machinery according to claim 4, characterized in that: Inner overflow grooves are formed on the side walls of the thick sections of the first docking shaft and the second docking shaft and on the inner end faces of the discs.

9. The conveying member for construction machinery according to claim 7, wherein: The number of the outer overflow grooves is not less than six.

10. The conveying member for construction machinery according to claim 8, wherein: The number of the inner overflow grooves is not less than six.

11. The conveying member for construction machinery according to claim 1, wherein: The oil adding component includes two symmetrically arranged inner connection rings. The inner connection rings are connected to the side walls of the movable pieces through several connecting columns. An activity push ring is movably embedded on the opposite faces of the two inner connection rings. An oil storage structure is arranged inside the activity push ring. An extension plate is arranged on the other face of the inner connection ring. The extension plate is staggered with the blocking piece. The extension plate abuts against the connection part of the thin section and the thick section. A second oil outlet hole communicating with the oil storage structure is formed at the end of the extension plate. A side ring is arranged on the side wall of the inner connection ring. A first oil outlet hole is formed on the outer side wall of the side ring, and the first oil outlet hole communicates with the oil storage structure.

12. The conveying member for construction machinery according to claim 11, wherein: The first oil outlet hole is aligned with the overflow hole.

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