Long-life conveyor chain and method of assembly

Abstract

The application discloses a long-service-life conveying chain and an assembling method, belongs to the technical field of chain transmission, and comprises alternating inner links and outer links, wherein an embedded sealing ring mechanism is arranged between the inner links and the outer links, and the assembling method comprises the steps of assembling two chains according to the physical law that the smaller the length error between the two chains is, the more consistent the synchronization of the two chains during conveying is, and the more consistent the stress conditions of the two chains are. The sealing ring adopts a high-low-lip double-X structure design and is embedded between the inner links and the outer links, so that the service life of the sealing ring and the maintenance period of the chain are improved, the problem of large whole-chain distortion of the sealing ring chain is solved, and the service life of the whole chain is improved. The application further discloses a matching assembling process of synchronously running chains, and the sectional matching assembling improves the problems of large chain length dispersion and uneven bearing of the chain, and improves the running stability of the chain as a whole.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of chain transmission, and particularly relates to a long-service-life conveying chain and an assembling method. BACKGROUND

[0002] In order to prolong the lubrication period of the chain as much as possible and improve the service life of the chain, a sealing ring is used on many specifications of chains to avoid the loss of lubricating oil between the shaft sleeves and the entry of dust. However, the service life of the rubber sealing ring is greatly related to the external environment, and the sealing ring exposed to the outside for a long time has a short failure period, and the sealing ring is prone to breakage and falling off during the operation of the chain system. At the same time, the introduction of the sealing ring between the inner chain link and the outer chain link increases the gap between the two, and the overall twisting amount of the chain cannot be effectively controlled. In particular for some conveying chains, the larger gap makes the chain running stability poor, and the mud or dust is easy to enter the upper and lower surfaces of the sealing ring, causing the wear and failure of the sealing ring.

[0003] In addition, large conveying facilities are generally tens of meters or even hundreds of meters long, and are conveyed by the synchronous operation of two chains. Therefore, higher requirements are put forward for the chain length accuracy of the synchronously operated chains. The traditional chain with a sealing ring cannot meet the actual needs, and one of the chains is prone to early breakage due to uneven stress on both sides of the chain during the operation of the chain system, causing irreparable accident losses. SUMMARY

[0004] The application discloses a long-service-life conveying chain and an assembling method. The chain is designed with an embedded sealing ring and adopts a high-low-lip double-X structure, which avoids the early failure of the sealing ring due to long-term exposure, improves the gap control between the inner and outer chain links, prolongs the lubrication and maintenance period of the chain, and improves the running stability of the chain.

[0005] To achieve the above-mentioned purpose, the technical scheme of the application is as follows:

[0006] A long-service-life conveying chain, comprising alternately connected inner chain links and outer chain links, and an embedded sealing ring mechanism is arranged between the inner chain links and the outer chain links.

[0007] Preferably, the inner chain link comprises two oppositely arranged inner chain plates, the two inner chain plates are connected through two sleeves, the two ends of the sleeve are respectively in interference fit with the corresponding inner chain plate connecting holes, the sleeve is externally provided with a roller, and the roller is in clearance fit with the sleeve; the outer chain link comprises an outer chain plate, the outer chain plate is connected between adjacent inner chain links through a pin shaft, and the embedded sealing ring mechanism is arranged between the outer chain plate and the opposite inner chain plate.

[0008] Preferably, the outer link further comprises an additional plate, which is arranged opposite to the outer chain plate and connected by two pin shafts, the two pin shafts respectively pass through the sleeve at the outer side end of the adjacent inner link, one end of the pin shaft is in interference fit with the hole of the additional plate, and the other end is in transition fit with the hole of the outer chain plate, and the additional plate and the opposite inner chain plate are also provided with an embedded sealing ring mechanism.

[0009] Preferably, the embedded sealing ring mechanism comprises a sealing ring body, the outer side end surface of the sleeve and the same side outer surface of the inner chain plate are kept a distance H, the inner port of the hole of the additional plate and the hole of the outer chain plate is provided with a chamfer, the outer side end surface of the sleeve, the hole of the inner chain plate and the chamfer form an embedded structure for accommodating the sealing ring body, and the lower edge of the chamfer is located inside the hole of the inner chain plate or aligned with the inner wall of the hole of the inner chain plate.

[0010] Preferably, the sealing ring body adopts a high-low lip double X structure design, the inner diameter d1 of the sealing ring body and the outer diameter D1 of the pin shaft satisfy the relationship: d1 = (70%-90%)*D1.

[0011] Preferably, the outer diameter d2 of the high lip of the sealing ring body and the hole diameter D2 of the hole of the inner chain plate satisfy the relationship: d2 = (115%-130%)*D2, and the low lip outer surface is in contact with the chamfer of the hole of the additional plate or the hole of the outer chain plate.

[0012] Preferably, after the sealing ring body is placed in the embedded structure, the groove between the high and low lips is located between the side gap between the inner link and the outer link.

[0013] Preferably, the two ends of the pin shaft respectively adopt a half-round head step structure and a flat head structure, and during installation, the flat head structure is in a posture with a horizontal width greater than a thickness, and the end of the flat head structure is further provided with a locking pin.

[0014] An assembly method of a long-life conveying chain, the assembly method relates to the assembly of two chains for synchronous conveying in the same device, according to the physical law that the smaller the length error between the two chains, the more consistent the synchronization of the two chains during conveying, and the more consistent the stress of the two chains, the two chains are assembled, including the following steps:

[0015] (1) The two chains are assembled by a plurality of chain segments, wherein the basic length of each chain segment is consistent, and the only difference is that the dispersion difference of each chain segment is different within a tolerance range, each chain segment is pre-tensioned and chain length detected, and a plurality of chain segments are sequentially marked as L1, L2, L3…Ln from long to short according to the chain length of each chain segment. i ;

[0016] (2) Divide several chain segments into 2 groups, with the same number of chain segments in each group. The grouping principle is: Principle 1: The closer the total length of the chain segments in the 2 groups is, the better. Principle 2: The closer the total length of the chain segments is, the better. The chain segments in the 2 groups are paired one by one, and the closer the two paired chain segments are, the better. On this basis, the principle of the closer the total length of the chain segments in the 2 groups is, the better.

[0017] (3) After pairing according to principle two, assemble the two chains separately. When assembling, assemble the longer chain segment on both sides of the chain that has not been linked, and assemble the shorter chain segment in the middle of the chain that has not been linked.

[0018] Preferably, in step (2), if the number of chain segments of the two chains is a multiple of 4, then the pairing method of the two chains is as follows: the chain segments of chain one are arranged in the order of L1-L5…L i-11 -L i-7 -L i-3 -L i-1 -L i-5 -L i-9 -L i-13 …L7-L3, the chain segment arrangement order of chain two is: L2-L6…L i-10 -L i-6 -L i-2 -L i -L i-4 -L i-8 -L i-12 …L8-L4; that is, each chain segment on both sides of chain two is shorter than the corresponding chain segment in chain one, and the two corresponding chain segments are in adjacent positions in the chain segment length sorting. Each chain segment in the middle of chain two is longer than the corresponding chain segment in chain one, and the two corresponding chain segments are in adjacent positions in the chain segment length sorting.

[0019] Preferably, in step (2), if the number of chain segments of the two chains is not a multiple of 4, the pairing method of the two chains is as follows: the chain segments of chain one are arranged in the order of L1-L5…L i-13 -L i-9 -L i-5 -L i-1 -L i-3 -L i-7 -L i-11 …L7-L3, the chain segment arrangement order of chain two is: L2-L6…L i-12 -L i-8 -L i-4 -L i -L i-2 -L i-6 -L i-10 …L8-L4.

[0020] The beneficial effects of the high-life conveyor chain and assembly method of the present invention are as follows:

[0021] This invention employs a high-low lip double X-shaped sealing ring design, which is embedded between the inner and outer chain links. This not only improves the service life of the sealing ring and the maintenance cycle of the chain, but also solves the problem of large chain twisting, thus extending the overall chain lifespan. This invention also discloses a pairing assembly process for synchronously running chains. Segmented matching assembly improves the problems of large chain length variations and uneven load bearing, thereby enhancing the overall chain operational stability. Attached Figure Description

[0022] Figure 1 , One A schematic diagram of a three-dimensional structure for a high-lifespan conveyor chain;

[0023] Figure 2 , One A front view schematic diagram of a high-lifespan conveyor chain;

[0024] Figure 3 An enlarged structural diagram of point A in this invention;

[0025] Figure 4 Schematic diagram of the pin structure;

[0026] Figure 5 Schematic diagram of the cross-sectional structure of the high and low lip double X-shaped sealing ring;

[0027] Figure 6 Schematic diagram of chain segment pairing and assembly process;

[0028] 1: Sleeve, 1-1: Outer end face of sleeve, 2: Inner chain plate, 2-1: Outer surface of inner chain plate on the same side, 3: Roller, 4: Pin, 4-1: Semi-circular head stepped structure, 4-2: Flat head structure, 5: Auxiliary plate, 6: Outer chain plate, 7: Sealing ring body, 8: Locking pin. Detailed Implementation

[0029] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0030] Example 1

[0031] A high-lifespan conveyor chain, such as Figures 1-5 As shown, it includes alternating inner and outer links, with an embedded sealing ring mechanism between the inner and outer links.

[0032] Example 2

[0033] Based on Example 1, this example is improved as follows:

[0034] As shown in Figures 1-5 , the inner chain link includes two oppositely arranged inner chain plates 2, and the two inner chain plates 2 are connected by two sleeves 1. The two ends of the sleeve 1 are respectively in interference fit with the corresponding inner chain plate connecting hole. The sleeve 1 is externally provided with a roller 3, and the roller 3 is in clearance fit with the sleeve 1. The outer chain link includes an outer chain plate 6, and the outer chain plate 6 is connected between adjacent inner chain links by a pin shaft. An embedded sealing ring mechanism is arranged between the outer chain plate 6 and the opposite inner chain plate 2.

[0035] This embodiment is applicable to the case where the outer chain link has an attached plate or does not have an attached plate.

[0036] Embodiment 3

[0037] Based on Embodiment 2, this embodiment is improved as follows:

[0038] As shown in Figures 1-5 , the outer chain link further includes an attached plate 5, and the attached plate 5 is arranged opposite to the outer chain plate 6 and is connected by two pin shafts 4. The two pin shafts 4 respectively pass through the sleeves 1 at the outer side ends of adjacent inner chain links. One end of the pin shaft 4 is in interference fit with the attached plate connecting hole, and the other end is in transition fit with the outer chain plate connecting hole. An embedded sealing ring mechanism is also arranged between the attached plate 5 and the opposite inner chain plate 2.

[0039] This embodiment provides the case where the outer chain link has an attached plate.

[0040] Embodiment 4

[0041] Based on Embodiment 3, this embodiment is improved as follows:

[0042] As shown in Figures 1-5 , the embedded sealing ring mechanism includes a sealing ring body 7. The outer side end surface 1-1 of the sleeve and the same side outer surface 2-1 of the inner chain plate maintain a certain distance H. The attached plate connecting hole and the outer chain plate connecting hole inner port are provided with a chamfer. The outer side end surface 1-1 of the sleeve, the inner chain plate connecting hole, and the chamfer form an embedded structure for accommodating the sealing ring body. The lower edge of the chamfer is located inside the inner chain plate connecting hole or aligned with the inner wall of the inner chain plate connecting hole.

[0043] In this embodiment, the sealing ring body is protected by the embedded structure, avoiding premature failure caused by excessive exposure. At the same time, the problem of unstable operation due to the sealing ring blocking a gap that is too large between the inner chain plate and the outer chain plate, and between the inner chain plate and the attached plate, is avoided.

[0044] Embodiment 5

[0045] Based on Embodiment 4, this embodiment is improved as follows:

[0046] As shown inFigures 1-5 As shown, the sealing ring body 7 adopts a high-low lip double X-shaped structure design, and the inner diameter d1 of the sealing ring body 7 and the outer diameter D1 of the pin shaft 4 satisfy the relationship: d1 = (70%-90%)*D1. The advantage of such design is that within the elastic deformation range of the sealing ring, the inner diameter of the sealing ring and the outer diameter of the pin shaft are tightly contacted to prevent the outflow of lubricating oil.

[0047] As shown in the figure, Figures 1-5 As shown, the outer diameter d2 of the high lip of the sealing ring body 7 and the hole diameter D2 of the inner chain plate connecting hole satisfy the relationship: d2 = (115%-130%)*D2, and the low lip outer surface is in contact with the chamfer of the connecting hole of the additional plate or the outer chain plate. The advantage of such design is that within the elastic deformation range of the sealing ring, the outer diameter of the sealing ring and the connecting hole of the inner chain plate are tightly contacted to prevent the entry of dust.

[0048] As shown in the figure, Figures 1-5 As shown, after the sealing ring body 7 is placed in the embedded structure, the groove between the high and low lips is located between the side gap between the inner chain link and the outer chain link (i.e. the gap between the inner chain plate and the opposite outer chain plate, the gap between the additional plate and the opposite inner chain plate).

[0049] In this embodiment, the elastic deformation range of the sealing ring is fully considered, and the effect of preventing the outflow of lubricating oil and avoiding the entry of dust is achieved through the design of related dimensions.

[0050] Embodiment 6

[0051] Based on embodiment 5, this embodiment is improved as follows:

[0052] As shown in the figure, Figures 1-5 As shown, the pin shaft 4 adopts a semi-circular head step structure 4-1 and a flat head structure 4-2 at both ends, and during installation, the flat head structure 4-2 is in a posture with a horizontal width greater than the thickness, and the end of the flat head structure 4-2 is also provided with a locking pin 8.

[0053] Embodiment 7

[0054] Based on embodiment 6, this embodiment discloses:

[0055] An assembly method of a long-life conveying chain, as shown in the figure, Figure 6 The assembly method involves the assembly of two chains, and the two chains are used for synchronous conveying in the same device. According to the physical law that the smaller the length error between the two chains, the more consistent the synchronization of the two chains during conveying, and the more consistent the stress of the two chains, the two chains are assembled, including the following steps:

[0056] (1) The two chains are assembled from several chain segments. The basic length of each chain segment is the same. The only difference is that the dispersion within the tolerance range of each chain segment is different. Pre-tensioning and chain length detection are performed on each chain segment. According to the chain length of each chain segment, the several chain segments are marked from longest to shortest as L1, L2, L3...L i ;

[0057] (2) Divide several chain segments into 2 groups, with the same number of chain segments in each group. The grouping principle is: Principle 1: The closer the total length of the chain segments in the 2 groups is, the better. Principle 2: The closer the total length of the chain segments is, the better. The chain segments in the 2 groups are paired one by one, and the closer the two paired chain segments are, the better. On this basis, the principle of the closer the total length of the chain segments in the 2 groups is, the better.

[0058] (3) After pairing according to principle two, assemble the two chains separately. When assembling, assemble the longer chain segment on both sides of the chain that has not been linked, and assemble the shorter chain segment in the middle of the chain that has not been linked.

[0059] Since the two chains operate synchronously on the same device, good synchronization between paired chain segments guarantees good synchronization between the two chains. Principle Two refines Principle One based on this physical law. Only by adhering to this principle and further prioritizing the similarity in the total lengths of the two chain segments can high synchronization between the two chains be achieved. If the principle of synchronization between paired chain segments is not followed, even if the total lengths of the two chains are very close, the synchronization effect will be worse than that achieved by adhering to Principle Two. This is because the lengths of the two paired chain segments may differ significantly, which will affect the overall force balance and operational stability of the chain.

[0060] Example 8

[0061] Based on Example 7, this example discloses:

[0062] like Figure 6 As shown, in step (2), if the number of chain segments of the two chains is a multiple of 4, then the pairing method of the two chains is as follows: the chain segment arrangement order of chain one is: L1-L5…L i-11 -L i-7 -L i-3 -L i-1 -L i-5 -L i-9 -L i-13 …L7-L3, the chain segment arrangement order of chain two is: L2-L6…L i-10 -L i-6 -L i-2 -L i -L i-4 -L i-8 -Li-12 …L8-L4; i.e. each chain segment of chain two located at both sides is shorter than the corresponding chain segment of chain one, and the two corresponding chain segments are adjacent in the chain segment length order, each chain segment of chain two located in the middle is longer than the chain segment at the corresponding position of chain one, and the two corresponding chain segments are adjacent in the chain segment length order.

[0063] As shown in Figure 6 , in the step (2), if the number of chain segments of the two chains is not a multiple of 4, the pairing mode of the two chains is: the chain segment arrangement order of chain one is: L1-L5…L i-13 -L i-9 -L i-5 -L i-1 -L i-3 -L i-7 -L i-11 …L7-L3, and the chain segment arrangement order of chain two is: L2-L6…L i-12 -L i-8 -L i-4 -L i -L i-2 -L i-6 -L i-10 …L8-L4.

[0064] This embodiment is a specific example of how to assemble according to whether the total number of chain segments is a multiple of 4. Of course, in actual operation, the total number of chain segments can also be a multiple of other natural numbers, but the principle of the assembly method is consistent.

Claims

1. A long-life conveyor chain, characterized in that: It includes alternating inner and outer links, with an embedded sealing ring mechanism between the inner and outer links; The inner link includes two opposing inner link plates connected by two sleeves. Both ends of the sleeves are interference-fitted with the corresponding inner link plate connection holes. Rollers are provided on the outside of the sleeves, and these rollers are clearance-fitted with the sleeves. The outer link includes an outer link plate connected to adjacent inner link sections via pins. An embedded sealing ring mechanism is provided between the outer link plate and the opposing inner link plate. Alternatively, the outer link also includes an auxiliary plate, which is opposite to the outer link plate and connected by two pins. The two pins pass through the sleeves at the outer ends of adjacent inner link sections. One end of each pin is interference-fitted with the auxiliary plate connection hole, and the other end is transition-fitted with the outer link plate connection hole. An embedded sealing ring mechanism is also provided between the auxiliary plate and the opposing inner link plate. The embedded sealing ring mechanism includes a sealing ring body. The outer end face of the sleeve maintains a certain distance H from the outer surface of the inner chain plate on the same side. The inner ports of the auxiliary plate connecting hole and the outer chain plate connecting hole are chamfered. The outer end face of the sleeve, the inner chain plate connecting hole, and the chamfer form an embedded structure for accommodating the sealing ring body. The lower edge of the chamfer is located inside the inner chain plate connecting hole or aligned with the inner wall of the inner chain plate connecting hole. The sealing ring body adopts a high-low lip double X-shaped structure design. The groove between the high and low lips is located between the side gaps between the inner and outer chain links.

2. The high-lifespan conveyor chain as described in claim 1, characterized in that: The inner diameter d1 of the sealing ring body and the outer diameter D1 of the pin satisfy the following relationship: d1 = (70% - 90%) * D1.

3. The high-lifespan conveyor chain as described in claim 2, characterized in that: The outer diameter d2 of the high lip of the sealing ring body and the diameter D2 of the inner chain plate connection hole satisfy the following relationship: d2 = (115% - 130%) * D2, and the outer surface of the low lip contacts the chamfer of the auxiliary plate connection hole or the outer chain plate connection hole.

4. A high-lifespan conveyor chain as described in claim 3, characterized in that: After the sealing ring body is placed in the embedded structure, the groove between the high and low lips is located between the side gaps between the inner and outer links.

5. A high-lifespan conveyor chain as described in claim 4, characterized in that: The pin has a semi-circular head stepped structure and a flat head structure at both ends, respectively. During installation, the flat head structure is positioned with a lateral width greater than its thickness. The end of the flat head structure is also equipped with a locking pin.

6. The assembly method of a high-life conveyor chain as described in any one of claims 1-5, characterized in that: The assembly method involves assembling two chains for synchronous conveying in the same device. Based on the physical principle that the smaller the length error between the two chains, the more consistent their synchronicity and stress distribution during conveying. The assembly of the two chains includes the following steps: (1) The two chains are assembled from several chain segments. The basic length of each chain segment is the same. The only difference is that the dispersion of each chain segment is different within the tolerance range. Pre-tensioning and chain length detection are performed on each chain segment. According to the chain length of each chain segment, the several chain segments are marked from the longest to the shortest as L1, L2, L3...L i ; (2) Divide several chain segments into 2 groups, with the same number of chain segments in each group. The grouping principle is: Principle 1: The closer the total length of the chain segments in the 2 groups is, the better. Principle 2: The closer the total length of the chain segments is, the better. The chain segments in the 2 groups are paired one by one, and the closer the two paired chain segments are, the better. On this basis, the principle of the closer the total length of the chain segments in the 2 groups is, the better. (3) After pairing according to principle two, assemble the two chains respectively. When assembling, assemble the longer chain segment on both sides of the chain that has not been linked, and assemble the shorter chain segment in the middle of the chain that has not been linked.

7. The assembly method of a high-life conveyor chain as described in claim 6, characterized in that: In step (2), if the number of chain segments of the two chains is a multiple of 4, then the pairing method of the two chains is as follows: the chain segment arrangement order of chain one is: L1-L5…L i-11 -L i-7 -L i-3 -L i-1 -L i-5 -L i-9 -L i-13 …L7-L3, the chain segment arrangement order of chain two is: L2-L6…L i-10 -L i-6 -L i-2 -L i -L i-4 -L i-8 -L i-12 …L8-L4; that is, each chain segment on both sides of chain two is shorter than the corresponding chain segment of chain one, and the two corresponding chain segments are in adjacent positions in the chain segment length sorting. Each chain segment in the middle of chain two is longer than the corresponding chain segment in chain one, and the two corresponding chain segments are in adjacent positions in the chain segment length sorting. In step (2), if the number of chain segments of the two chains is not a multiple of 4, the pairing method of the two chains is as follows: the chain segment arrangement order of chain one is: L1-L5…L i-13 -L i-9 -L i-5 -L i-1 -L i-3 -L i-7 -L i-11 …L7-L3, the chain segment arrangement order of chain two is: L2-L6…L i-12 -L i-8 -L i-4 -L i -L i-2 -L i-6 -L i-10 …L8-L4.

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