Precise assembly structure and assembly method of high-wear-resistant conveying chain

Abstract

The application discloses a precision assembly structure and assembly method of a high-wear-resistance conveying chain, and relates to the technical field of chain assembly. The precision assembly structure comprises a feeding frame, a mounting frame is fixed to the right side of the feeding frame, a feeding mechanism for grading conveying of inner chain plates is arranged in the feeding frame, and a plurality of inner chain links are uniformly fed into the feeding mechanism. The precision assembly structure and assembly method of the high-wear-resistance conveying chain are characterized in that the separation of the U-shaped seat and the limiting support of the bearing area are used, the two shaft hole axes of the inner chain link to be assembled are aligned and kept parallel when the inner chain link falls into the assembly area, and the sliding and close-fitting lateral limiting of the inner wall of the conveying groove and the sealing plate is used. The passive mechanical centering structure forcibly restricts the inner chain link on the reference surface parallel to the sleeve press-fitting axis, thereby providing a high-precision positioning prerequisite for subsequent press fitting.

Description

Technical Field

[0001] This invention relates to the field of chain assembly technology, specifically to a precision assembly structure and assembly method for a high wear-resistant conveyor chain. Background Technology

[0002] A conveyor chain assembly structure refers to a mechanical structure system that assembles core components such as inner chain links, outer chain links, pins, sleeves, and rollers into a complete chain through specific mating methods and connection processes. It is a mechanical connection structure that achieves continuous movement through the hinges between chain links, while simultaneously carrying and conveying materials. It is widely used in automated production lines in fields such as mining, chemical industry, food processing, logistics, and automobile manufacturing.

[0003] The inner link is formed by pressing two inner link plates and two sleeves together with an interference fit. The outer link is formed by pressing two outer link plates and two pins together with an interference fit. When the inner link is assembled, the sleeve needs to be installed into the shaft of the inner link pair. However, in the actual assembly process, the shaft of the inner link will have an axial deviation from the sleeve during alignment, and they are not on the same assembly axis. The main reason for this is that the shaft of the sleeve and the shaft of the inner link are not on the same assembly surface, which causes errors in the equipment during loading.

[0004] Therefore, there is an urgent need to provide a precision assembly structure and assembly method for a high wear-resistant conveyor chain to solve the problem of assembly deviation caused by misalignment between the sleeve and the shaft in the existing assembly method. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a precision assembly structure and assembly method for a high wear-resistant conveyor chain, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a precision assembly structure and assembly method for a high wear-resistant conveyor chain, including a feeding frame, an mounting frame fixed on the right side of the feeding frame, a feeding mechanism for graded conveying of inner chain plates installed inside the feeding frame, a plurality of inner chain links being uniformly fed inside the feeding mechanism, the inner chain links being arranged symmetrically and coaxially, wherein a sleeve is assembled inside the mounting shaft of a pair of inner chain links; The mounting frame has guide grooves on the front and rear sides of the left side of the inner wall. Guide blocks are slidably installed on the inner walls of the guide grooves. The same receiving frame is fixed between the guide blocks. The left end of the receiving frame is the bearing area. The left end of the receiving frame extends into the feeding mechanism and forms a semi-circular bearing support with the bottom of the corresponding inner link. A double-layer assembly frame is fixedly installed on the top of the receiving frame. The assembly groove in the double-layer assembly frame is semi-circular and its height position is adapted to the height of the inner link mounting shaft as a concentric reference, so that the sleeve can accurately enter the inner link mounting shaft. The upper and lower layers of the double-layer assembly frame are staggered for synchronously receiving the sleeve. A moving mechanism is installed on the outer wall of the mounting frame, an interference fit assembly mechanism is installed on the right side of the mounting frame, a feeding mechanism is installed on the top of the mounting frame, and a transmission mechanism is installed on the right end of the feeding mechanism.

[0007] Furthermore, the interference fit assembly mechanism includes a hydraulic push rod fixedly installed on the right side of the mounting frame. The movable end of the hydraulic push rod slides through the mounting frame and is fixedly installed on a movable platform. An assembly push rod is fixedly installed on the left side of the movable platform and at the position corresponding to the assembly slot of the double-layer assembly frame. Limit blocks are fixedly installed on both the front and rear walls of the movable platform. Limit grooves are opened on both the front and rear parts of the right side of the inner wall of the mounting frame. The inner wall of the limit groove is slidably connected to the outer wall of the limit block.

[0008] Furthermore, the feeding mechanism includes a conveying trough located on the right side of the feeding frame. The bottom of the conveying trough is inclined at a large rearward angle. A sealing plate is installed on the right side of the feeding frame corresponding to the position of the conveying trough. An entry groove is opened on the side wall of the sealing plate corresponding to the position of the double-layer assembly frame. The inner walls of the conveying trough and the entry groove are in contact with the outer wall of the left end of the receiving frame. An installation groove is opened at the rear of the outer wall of the feeding frame. A control push rod is installed inside the installation groove. A movable seat is installed at the movable end of the control push rod. The movable seat is movable inside the installation groove. A positioning shaft is installed on the left side of the movable seat. A positioning groove is opened on the left side of the inner wall of the installation groove corresponding to the position of the positioning shaft. The inner wall of the positioning groove is slidably connected to the outer wall of the positioning shaft to guide and limit the movement path of the movable seat.

[0009] Furthermore, a pusher seat is installed on the right side of the movable seat. The pusher seat has a guide angle on the side near the conveying groove to lift the upper inner link during assembly. At the same time, the bottom wall of the pusher seat abuts and limits the assembly of the inner link. A through groove is opened on the right side of the inner wall of the mounting groove, corresponding to the position of the pusher seat. The inner wall of the through groove is slidably connected to the outer wall of the pusher seat. A partition plate is fixedly installed in the middle of the inner wall of the conveying groove to grade and feed the inner links to prevent mutual interference. A U-shaped frame is fixedly installed on the inner wall of the conveying groove, corresponding to the position of the entry groove, to form an assembly area for sleeve assembly of the inner links.

[0010] Furthermore, the moving mechanism includes a drive motor fixedly mounted on the outer wall of the mounting frame, a drive shaft rotatably mounted on the inner wall of the mounting frame, the front end of the drive shaft being fixedly connected to the power shaft of the drive motor through the mounting frame via a bearing, a drive gear being fixedly mounted on the outer wall of the drive shaft, a driven rack being fixedly mounted on the bottom wall of the receiving frame, the drive gear and the driven rack being meshed and connected, a worm gear being fixedly mounted on the rear end of the drive shaft through the mounting frame via a bearing, fixed seats being fixedly mounted on both sides of the rear wall of the mounting frame, and a worm being rotatably mounted between the fixed seats via a bearing seat, the worm being meshed and connected to the worm wheel.

[0011] Furthermore, the feeding mechanism includes circular feeding racks fixedly installed on both sides of the top of the mounting frame. The top of each feeding rack is connected to a feeding hopper, and the bottom of the feeding rack is connected to a feeding pipe. The bottom of the feeding pipe corresponds to the assembly slots of the upper and lower layers of the double-layer assembly frame, respectively. The inner wall of each feeding rack is rotatably mounted with a receiving roller via a rotating shaft. The outer surface of the receiving roller is evenly provided with several receiving slots for receiving the sleeve.

[0012] Furthermore, a connecting shaft is rotatably installed between the feeding racks. Both ends of the connecting shaft are fixedly connected to the rotating shaft of the receiving roller through the feeding rack via bearings, so that the receiving roller can rotate at the same speed and in the same direction within the corresponding feeding rack. One end of the rotating shaft of one of the receiving rollers is fixedly connected to the transmission mechanism through the feeding rack via a bearing.

[0013] Furthermore, the transmission mechanism includes a driven sprocket fixedly installed on the outer end of the rotating shaft, a control shaft rotatably mounted on the side wall of one of the fixed seats, one end of the control shaft passing through the fixed seat and fixedly connected to the worm gear via a bearing, a rotating ring fixedly installed on the outer wall of the control shaft, the top and bottom walls of the rotating ring having embedded grooves, a locking element hinged in the inner wall of each embedded groove, a return spring installed between the locking element and the embedded groove, one end of the return spring being fixedly connected to the locking element, and the other end of the return spring being fixedly connected to the embedded groove.

[0014] Furthermore, a fixed ring is rotatably mounted on the outer wall of the rotating ring, and a plurality of corner grooves are evenly opened on the inner wall of the fixed ring, wherein two corner grooves are respectively engaged with and limited by corresponding locking parts. A drive sprocket is fixedly mounted on the outer wall of the fixed ring, and the outer wall of the drive sprocket and the driven sprocket are connected by the same chain drive.

[0015] A precision assembly method for a high wear-resistant conveyor chain includes the following steps: S1. Fix the device at the preset installation position, so that the conveying trough is connected to the external inner chain link feeding equipment and the feeding hopper is connected to the external sleeve feeding equipment. Confirm the initial state. The propulsion seat extends into the conveying trough to isolate the inner chain link to be assembled, and the receiving frame extends into the conveying trough through the entry trough. S2. Start the drive motor to rotate forward, and drive the receiving frame and double-layer assembly frame to retract to the right and directly below the feeding tube through the drive gear and driven rack transmission; at the same time, the drive shaft drives the worm gear and worm drive, and drives the drive sprocket to rotate through the rotating ring, locking parts and corner groove, and through the chain, driven sprocket and connecting shaft transmission, the receiving roller rotates and sends the two sleeves into the upper and lower assembly slots of the double-layer assembly frame respectively. S3. The drive motor reverses and drives the receiving frame to the left through the entry slot and into the conveying slot. At this time, the transmission mechanism runs idle and the unloading mechanism remains stationary. At the same time, the feeding mechanism drives the propulsion seat to retract into the through slot. The inner chain link in the conveying slot falls to the left end bearing area of ​​the receiving frame under the action of gravity. After being separated by the partition plate, it enters the U-shaped frame assembly area to complete the centering. S4. The control push rod pushes the moving seat and the propulsion seat forward. The propulsion seat separates the inner link to be assembled and the inner link being assembled through the guide angle. Its top lifts the inner link to be assembled, and the bottom wall cooperates with the bearing area to form upper and lower limits for the inner link being assembled. Combined with the left and right limits of the conveying groove and the sealing plate, the inner link is fixed in all directions around the circumference. S5. The hydraulic push rod pushes the moving table and the assembly push rod forward. The two assembly push rods press the upper and lower sleeves of the double-layer assembly frame into the two shaft holes of the inner link at a uniform speed, thus completing the sleeve assembly of a single inner link. S6. The drive motor rotates forward again, driving the receiving frame to retract to the unloading position for the next sleeve loading. At the same time, the inner chain link that has been assembled is automatically discharged under the push of subsequent parts as the propulsion seat retracts. The device repeats the above process to achieve continuous automated production.

[0016] The present invention has the following beneficial effects: (1) The precision assembly structure and assembly method of the high wear-resistant conveyor chain, through the separation of the U-shaped seat and the limiting support of the bearing area, when the inner chain link to be assembled falls into the assembly area, the axes of the two shaft holes are aligned and kept parallel. With the sliding fit of the conveyor groove and the inner wall of the sealing plate for lateral limiting, this passive mechanical centering structure forcibly constrains the inner chain link on the reference surface parallel to the sleeve pressing axis, providing a high-precision positioning prerequisite for subsequent pressing.

[0017] (2) The precision assembly structure and assembly method of the high wear-resistant conveyor chain: the push seat separates the inner chain link of the assembly position from the upper part to be assembled by the wedge-type separation action of the front guide angle, and forms an upper and lower clamp with the bearing area. Together with the conveying groove and the side wall of the sealing plate, it achieves multiple forced positioning in the upper, lower and left and right, so that the sleeve always remains coaxially pressed into the shaft hole under the push of the hydraulic push rod. The interference fit is uniform and consistent, which effectively avoids the chain plate cracking or pressing misalignment caused by the skew.

[0018] (3) The precision assembly structure and assembly method of the high wear-resistant conveyor chain, through the locking parts, corner grooves and return springs to form a one-way torque transmission structure, combined with the self-locking characteristics of the worm gear, realizes that the feeding mechanism is driven to feed material only when the receiving frame is retracted into place, while the rotating ring automatically idles during the resetting process of the receiving frame. The clutch mechanism of forward drive and reverse idle completely eliminates the problem of step accumulation and phase disorder that is easy to be generated by continuous feeding of traditional chain drive, ensuring that the sleeve falling position is strictly synchronous with the assembly groove, avoiding axial alignment failure and material interference caused by misfeeding.

[0019] (4) The precision assembly structure and assembly method of the high wear-resistant conveyor chain, the receiving frame moves smoothly under the precise limit of the guide block and the guide groove, so that the double-layer assembly frame and the feeding tube are aligned, the uniform rotation of the receiving roller realizes the synchronous feeding of the sleeve on both sides, and then forms a strict timing coordination with the positioning and locking of the push seat and the pressing action of the assembly push rod. The whole process forms a mechanical linkage through the same source drive of the active gear, driven rack, worm gear and chain drive, etc., and completes all processes such as feeding, centering, locking, pressing and resetting in a single cycle, which greatly improves the automation level of the inner chain assembly and the product consistency.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] Figure 1 This is a front view of the external structure of the present invention; Figure 2 This is a rear view of the external structure of the present invention; Figure 3 This is a diagram showing the assembly of the feeding rack and feeding mechanism of the present invention; Figure 4 The internal structure of the feeding mechanism of this invention exploded. Figure 1 ; Figure 5 The internal structure of the feeding mechanism of this invention exploded. Figure 2 ; Figure 6 This is an exploded view of the partition plate, U-shaped frame, inner link and sleeve of the present invention; Figure 7 This is a cross-sectional view of the internal structure of the feeding rack of the present invention; Figure 8 This invention comprises a mounting frame, a feeding mechanism, and an interference fit assembly mechanism. Figure 1 ; Figure 9 This invention comprises a mounting frame, a feeding mechanism, and an interference fit assembly mechanism. Figure 2 ; Figure 10 This invention comprises an interference fit assembly mechanism, a receiving frame, and a double-layer assembly frame assembly. Figure 1; Figure 11 This is a combined diagram of the receiving frame, double-layer assembly frame, and guide block of the present invention; Figure 12 The present invention comprises a moving mechanism, a receiving frame, and a double-layer assembly frame. Figure 1 ; Figure 13 The present invention comprises a moving mechanism, a receiving frame, and a double-layer assembly frame. Figure 2 ; Figure 14 This is a cross-sectional view of the internal structure of the mounting bracket of the present invention; Figure 15 This invention comprises an interference fit assembly mechanism, a receiving frame, and a double-layer assembly frame assembly. Figure 2 ; Figure 16 This invention comprises a moving mechanism, a transmission mechanism, and a feeding mechanism. Figure 1 ; Figure 17 This invention comprises a moving mechanism, a transmission mechanism, and a feeding mechanism. Figure 2 ; Figure 18 This is a schematic diagram of the internal structure of the transmission mechanism of the present invention; Figure 19 This is an exploded view of the internal structure of the transmission mechanism of the present invention; Figure 20 This is an exploded view of the internal structure of the feeding mechanism of the present invention; Figure 21 This is a cross-sectional view of the internal structure of the feeding mechanism of the present invention.

[0022] In the diagram, 1. Feeding rack; 2. Feeding mechanism; 21. Sealing plate; 22. Conveying trough; 23. Divider plate; 24. U-shaped frame; 25. Control push rod; 26. Moving seat; 27. Mounting slot; 28. Push seat; 29. ​​Guide angle; 210. Positioning shaft; 211. Through slot; 212. Positioning slot; 213. Entering slot; 3. Moving mechanism; 31. Drive motor; 32. Drive shaft; 33. Drive gear; 34. Driven rack; 35. Worm gear; 36. Fixed seat; 37. Worm; 4. Unloading mechanism; 41. Unloading rack; 42. Feed hopper; 43. Unloading 44. Pipe; 45. Receiving roller; 46. Receiving groove; 5. Connecting shaft; 5. Interference fit assembly mechanism; 51. Hydraulic push rod; 52. Moving table; 53. Limit block; 54. Assembly push rod; 55. Limit slide groove; 6. Transmission mechanism; 61. Driven sprocket; 62. Drive sprocket; 63. Return spring; 64. Fixed ring; 65. Corner groove; 66. Rotating ring; 67. Control shaft; 68. Embedded groove; 69. Locking element; 7. Mounting bracket; 8. Inner chain link; 9. Sleeve; 10. Support frame; 11. Double-layer assembly frame; 12. Guide block; 13. Guide groove; 14. Bearing area. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0025] Please see Figures 1-21 The present invention provides a technical solution: a precision assembly structure and assembly method for a high wear-resistant conveyor chain, including a feeding frame 1, an mounting frame 7 fixed on the right side of the feeding frame 1, a feeding mechanism 2 for graded conveying of inner chain plates installed inside the feeding frame 1, a number of inner chain links 8 being uniformly fed inside the feeding mechanism 2, the inner chain links 8 being arranged symmetrically and coaxially, and a sleeve 9 being assembled inside the mounting shaft of a pair of inner chain links 8. Guide grooves 13 are provided on the front and rear sides of the left side of the inner wall of the mounting frame 7. Guide blocks 12 are slidably installed on the inner wall of the guide grooves 13. The same support frame 10 is fixed between the guide blocks 12. The left end of the support frame 10 is the bearing area 14. The left end of the support frame 10 extends into the feeding mechanism 2 and forms a semi-circular bearing support with the bottom of the corresponding inner link 8. A double-layer assembly frame 11 is fixedly installed on the top of the support frame 10. The assembly groove in the double-layer assembly frame 11 is semi-circular and its height position is matched with the height of the mounting shaft of the inner link 8 as a concentric reference, so that the sleeve 9 can accurately enter the mounting shaft of the inner link 8. The upper and lower layers of the double-layer assembly frame 11 are staggered to synchronously support the sleeve 9. A moving mechanism 3 is installed on the outer wall of the mounting frame 7, an interference fit assembly mechanism 5 is installed on the right side of the mounting frame 7, a feeding mechanism 4 is installed on the top of the mounting frame 7, and a transmission mechanism 6 is installed on the right end of the feeding mechanism 4. In this embodiment, by setting the assembly slot of the double-layer assembly frame 11 and the mounting shaft of the inner link 8 to the same concentric reference, the axial deviation problem caused by the sleeve 9 and the shaft of the inner link 8 not being on the same assembly surface in the traditional assembly process is fundamentally solved. The double-layer staggered assembly slot can simultaneously support two sleeves 9, realizing the synchronous assembly of the two shaft holes of the inner link 8, which greatly improves the assembly efficiency and assembly consistency. The precise cooperation between the guide slot 13 and the guide block 12 ensures that the receiving frame 10 always maintains horizontal linear motion during reciprocating motion, further guaranteeing the assembly accuracy.

[0026] Specifically, the interference fit assembly mechanism 5 includes a hydraulic push rod 51 fixedly installed on the right side of the mounting frame 7. The movable end of the hydraulic push rod 51 slides through the mounting frame 7 and is fixedly installed on a movable table 52. An assembly push rod 54 is fixedly installed on the left side of the movable table 52 and at the position corresponding to the assembly slot of the double-layer assembly frame 11. Limit blocks 53 are fixedly installed on both the front and rear walls of the movable table 52. Limit grooves 55 are opened on both the front and rear parts of the right side of the inner wall of the mounting frame 7. The inner wall of the limit groove 55 is slidably connected to the outer wall of the limit block 53. In this embodiment, a hydraulic push rod 51 is used as the pressing power source, which can provide a stable and adjustable pressing force to ensure that a uniform and reliable interference fit is formed between the sleeve 9 and the inner link 8. The sliding fit between the limiting block 53 and the limiting slide groove 55 can limit the up-down and left-right swaying of the moving table 52, and ensure that the movement direction of the assembly push rod 54 is coaxial with the axis of the inner link 8, so as to avoid the sleeve 9 tilting or shifting during the pressing process.

[0027] Specifically, the feeding mechanism 2 includes a conveying trough 22 on the right side of the feeding frame 1. The bottom of the conveying trough 22 is tilted at a large rearward angle. A sealing plate 21 is installed on the right side of the feeding frame 1, corresponding to the position of the conveying trough 22. An entry groove 213 is opened on the side wall of the sealing plate 21, corresponding to the position of the double-layer assembly frame 11. The inner walls of the conveying trough 22 and the entry groove 213 are in contact with the outer wall of the left end of the receiving frame 10. An installation groove 27 is opened at the rear of the outer wall of the feeding frame 1. A control push rod 25 is installed inside the installation groove 27. A movable seat 26 is installed at the movable end of the control push rod 25. The movable seat 26 moves inside the installation groove 27. A positioning shaft 210 is installed on the left side of the movable seat 26. A positioning groove 212 is opened on the left side of the inner wall of the installation groove 27, corresponding to the position of the positioning shaft 210. The inner wall of the positioning groove 212 is slidably connected to the outer wall of the positioning shaft 210, which is used to guide and limit the movement path of the movable seat 26. In this embodiment, the conveying trough 22 adopts a large rearward tilt angle design, which allows the inner link 8 to slide automatically downward under the action of gravity. After assembly, it can be discharged from the rear end of the conveying trough 22. The sealing plate 21 cooperates with the conveying trough 22 to form a closed conveying channel, which can prevent the inner link 8 from falling or shifting during the conveying process. The sliding cooperation between the positioning shaft 210 and the positioning groove 212 can guide the movement of the moving seat 26, ensuring that the push seat 28 can be accurately inserted into the gap between the two inner links 8, realizing reliable separation and limiting functions.

[0028] Specifically, a pusher seat 28 is installed on the right side of the movable seat 26. A guide angle 29 is provided on the side of the pusher seat 28 near the conveying groove 22 to lift the upper inner link 8 during the assembly process. At the same time, the bottom wall of the pusher seat 28 abuts against the outer wall of the inner link 8 being assembled and limits its position. A through groove 211 is provided on the right side of the inner wall of the mounting groove 27 and at the position corresponding to the pusher seat 28. The inner wall of the through groove 211 is slidably connected to the outer wall of the pusher seat 28. A partition plate 23 is fixedly installed in the middle of the inner wall of the conveying groove 22 to grade and feed the inner links 8 to prevent mutual interference. A U-shaped frame 24 is fixedly installed on the inner wall of the conveying groove 22 and at the position corresponding to the entry groove 213 to form an assembly area for the inner links 8 to assemble the sleeve 9. In this embodiment, the guide angle 29 at the front end of the propulsion seat 28 enters the gap between the two inner chain links 8, and the partition plate 23 divides the conveying groove 22 into two independent conveying channels, so that the two inner chain links 8 can be conveyed in parallel without interfering with each other, ensuring the arrangement accuracy of the inner chain links 8.

[0029] Specifically, the moving mechanism 3 includes a drive motor 31 fixedly installed on the outer wall of the mounting frame 7, a drive shaft 32 rotatably installed on the inner wall of the mounting frame 7, the front end of the drive shaft 32 passing through the mounting frame 7 and fixedly connected to the power shaft of the drive motor 31 through a bearing, a drive gear 33 fixedly installed on the outer wall of the drive shaft 32, a driven rack 34 fixedly installed on the bottom wall of the receiving frame 10, the drive gear 33 and the driven rack 34 meshing and connecting, a worm gear 35 fixedly installed on the rear end of the drive shaft 32 passing through the mounting frame 7 through a bearing, fixed seats 36 fixedly installed on both sides of the rear wall of the mounting frame 7, a worm 37 rotatably installed between the fixed seats 36 through a bearing seat, and the worm 37 meshing and drivingly connecting with the worm gear 35; In this embodiment, a direct drive transmission structure of driving gear 33 and driven rack 34 is adopted. The meshing transmission of worm gear 35 and worm 37 can not only realize the 90° steering transmission of power, but also has a self-locking characteristic. It can automatically lock the position of the support frame 10 when the drive motor 31 stops rotating, preventing it from moving due to inertia or external force, and further improving the operational stability and safety of the equipment.

[0030] Specifically, the feeding mechanism 4 includes a circular feeding frame 41 fixedly installed on both sides of the top of the mounting frame 7. The top of the feeding frame 41 is connected to a feeding hopper 42, and the bottom of the feeding frame 41 is connected to a feeding pipe 43. The bottom of the feeding pipe 43 corresponds to the assembly slots of the upper and lower layers of the double-layer assembly frame 11 respectively. The inner wall of the feeding frame 41 is rotatably installed with a receiving roller 44 through a rotating shaft. The outer surface of the receiving roller 44 is evenly provided with a number of receiving slots 45 for receiving the sleeve 9. In this embodiment, the feed hopper 42 adopts a large opening design to store a large number of sleeves 9, and the discharge pipe 43 adopts a straight pipe design that matches the outer diameter of the sleeve 9, which can accurately guide the falling process of the sleeve 9 and ensure that the sleeve 9 can accurately fall into the assembly slot of the double-layer assembly frame 11. The size of the receiving groove 45 on the surface of the receiving roller 44 is precisely matched with the size of the sleeve 9, and each rotation can just convey one section of sleeve 9, realizing the quantitative and fixed-distance feeding of the sleeve 9.

[0031] Specifically, a connecting shaft 46 is rotatably installed between the unloading racks 41. Both ends of the connecting shaft 46 are fixedly connected to the rotating shaft of the receiving roller 44 through the unloading rack 41 via bearings, so that the receiving roller 44 can rotate at the same speed and in the same direction within the corresponding unloading rack 41. One end of the rotating shaft of one of the receiving rollers 44 is fixedly connected to the transmission mechanism 6 through the unloading rack 41 via bearings. In this embodiment, the rotating shafts of the two receiving rollers 44 are connected by the connecting shaft 46, which ensures that the two receiving rollers 44 rotate at the same speed and in the same direction. This ensures that the two sleeves 9 can be discharged from the feeding pipe 43 at the same time and fall into the upper and lower assembly slots of the double-layer assembly frame 11, thus providing a guarantee for subsequent synchronous pressing assembly.

[0032] Specifically, the transmission mechanism 6 includes a driven sprocket 61 fixedly installed on the outer end of the rotating shaft. A control shaft 67 is rotatably installed on the side wall of a fixed seat 36. One end of the control shaft 67 passes through the fixed seat 36 and is fixedly connected to the worm gear 37. A rotating ring 66 is fixedly installed on the outer wall of the control shaft 67. The top and bottom walls of the rotating ring 66 are provided with embedded grooves 68. Locking elements 69 are hinged in the inner walls of the embedded grooves 68. Return springs 63 are installed between the locking elements 69 and the embedded grooves 68. One end of the return spring 63 is fixedly connected to the locking elements 69, and the other end of the return spring 63 is fixedly connected to the embedded grooves 68. In this embodiment, the one-way locking mechanism composed of rotating ring 66, locking member 69 and return spring 63, when the control shaft 67 drives rotating ring 66 to rotate backward, the locking member 69 extends under the elastic force of return spring 63 and engages with the corner groove 65 on the inner wall of fixed ring 64 to transmit torque. When the control shaft 67 drives the rotating ring 66 to rotate forward, the locking member 69 is squeezed by the inclined surface of the corner groove 65, and the compression return spring 63 retracts into the inner groove 68 to achieve free rotation.

[0033] Specifically, a fixed ring 64 is rotatably mounted on the outer wall of the rotating ring 66. Several corner grooves 65 are evenly opened on the inner wall of the fixed ring 64. Two corner grooves 65 are respectively engaged with the corresponding locking parts 69 for limiting. A drive sprocket 62 is fixedly mounted on the outer wall of the fixed ring 64. The outer wall of the drive sprocket 62 and the driven sprocket 61 are connected by the same chain drive. In this embodiment, the corner groove 65 adopts a special structural design that combines right angles and inclined surfaces. The right angles ensure that the locking member 69 will not slip when transmitting torque, while the inclined surfaces ensure that the locking member 69 will retract smoothly when rotating in the opposite direction. Through the chain drive of the driving sprocket 62 and the driven sprocket 61, power is transmitted from the control shaft 67 to the rotating shaft of the receiving roller 44, realizing the synchronous linkage between the feeding of the sleeve 9 and the movement of the receiving frame 10.

[0034] A precision assembly method for a high wear-resistant conveyor chain includes the following steps: S1. Fix the device at the preset installation position, so that the conveying trough 22 is connected to the external inner chain link 8 feeding equipment and the feeding hopper 42 is connected to the external sleeve 9 feeding equipment. Confirm the initial state. The push seat 28 extends into the conveying trough 22 to isolate the inner chain link 8 to be assembled, and the receiving frame 10 extends into the inside of the conveying trough 22 through the entry groove 213. S2. Start the drive motor 31 to rotate forward, and drive the receiving frame 10 and the double-layer assembly frame 11 to retract to the right and directly below the unloading pipe 43 through the drive gear 33 and driven rack 34; at the same time, drive shaft 32 drives worm gear 35 and worm 37 to drive the drive sprocket 62 to rotate through rotating ring 66, locking part 69 and corner groove 65, and drive the receiving roller 44 to rotate through chain, driven sprocket 61 and connecting shaft 46 to send the two sleeves 9 into the upper and lower assembly slots of the double-layer assembly frame 11 respectively; S3, drive motor 31 reverses, driving the receiving frame 10 to the left through the entry groove 213 and into the conveying groove 22. At this time, the transmission mechanism 6 idles and the unloading mechanism 4 remains stationary. At the same time, the feeding mechanism 2 drives the push seat 28 to retract into the through groove 211. The inner chain link 8 in the conveying groove 22 falls to the left end bearing area 14 of the receiving frame 10 under the action of gravity. After being separated by the partition plate 23, it enters the U-shaped frame 24 assembly area to complete the centering. S4. The control push rod 25 pushes the moving seat 26 and the push seat 28 forward. The push seat 28 separates the inner link 8 to be assembled and the inner link 8 being assembled through the guide angle 29. Its top lifts the inner link 8 to be assembled, and its bottom wall cooperates with the bearing area 14 to form upper and lower limits on the inner link 8 being assembled. Combined with the left and right limits of the conveying groove 22 and the sealing plate 21, the inner link 8 is fixed in all directions around the circumference. S5, the hydraulic push rod 51 pushes the moving table 52 and the assembly push rod 54 forward, and the two assembly push rods 54 press the sleeves 9 of the upper and lower layers of the double-layer assembly frame 11 into the two shaft holes of the inner link 8 at a uniform speed, thus completing the assembly of the sleeves 9 of the single inner link 8. S6. The drive motor 31 rotates forward again, driving the receiving frame 10 to retract to the unloading position for the next loading of the sleeve 9. At the same time, the push seat 28 retracts and the assembled inner chain link 8 is automatically discharged under the push of subsequent parts. The device repeats the above process to achieve continuous automated production.

[0035] Working principle: The control push rod 25, drive motor 31, and moving stage 52 of this device are electrically connected to the external power supply through a standardized wire layout, providing a stable and controllable power source for the entire process of the device operation. The signal input terminals of the above-mentioned electrical control components are precisely connected one-to-one with the signal output terminals of the external controller, which can realize the real-time transmission and precise execution of commands. Through innovative mechanical structure design, a targeted solution is formed. The following is a detailed description of the specific working principle and technical effects. The entire device is installed at the preset installation position, so that the conveying trough 22 is connected to the external inner link 8 feeding device, and the feeding hopper 42 is connected to the external sleeve 9 feeding device to keep the feeding smooth. In the initial state, the push seat 28 extends into the conveying trough 22 through the through groove 211 to physically isolate the inner link 8 above from the assembly area to prevent the parts to be assembled from entering the assembly position in advance. At the same time, the receiving frame 10 extends into the conveying trough 22 through the entry groove 213 on the sealing plate 21 to prepare for the subsequent receiving of the inner link 8. When the assembly work begins, the drive motor 31 on the outer wall of the mounting frame 7 is started. The drive shaft 32 controls the drive gear 33 to rotate clockwise inside the mounting frame 7. At the same time, the drive shaft 32 drives the worm gear 35 at the rear end to rotate synchronously at the same speed and in the same direction. When the drive gear 33 rotates, it drives the driven rack 34 and the receiving frame 10 to move linearly. The driven rack 34 drives the receiving frame 10 to smoothly retract from the conveying groove 22 and the inlet groove 213 into the mounting frame 7. During this process, the receiving frame 10 drives the guide block 12 to slide along the inner wall of the guide groove 13 for guidance and limiting. The guide groove 13 and the guide block 12 adopt a clearance fit, which not only ensures the smoothness of sliding, but also effectively limits the up-down and left-right swaying of the receiving frame 10, ensuring that the double-layer assembly frame 11 can be accurately positioned below the feed tube 43. The receiving frame 10 synchronously drives the double-layer assembly frame 11 to move to the right, so that the upper and lower assembly grooves of the double-layer assembly frame 11 correspond to the outlet positions of the two feed tubes 43 respectively. At the same time, the rotation of the worm gear 35 will drive the worm 37 meshing with it to rotate backward between the fixed seats 36, realizing the synchronous linkage of the sleeve 9 feeding and the receiving frame 10 moving. The worm 37 drives the rotating ring 66 to rotate inside the fixed ring 64 through the control shaft 67. At this time, the locking part 69 installed in the inner groove 68 is tightly locked in the corner groove 65 of the inner wall of the fixed ring 64 under the elastic force of the return spring 63. Due to the special structural design of the corner groove 65, which combines a right angle surface and an inclined surface, when the rotating ring 66 rotates clockwise, the right angle surface of the locking part 69 is tightly fitted with the right angle surface of the corner groove 65, which can transmit all the torque. When the rotating ring 66 rotates counterclockwise, the inclined surface of the locking part 69 contacts the inclined surface of the corner groove 65, which will automatically compress the return spring 63 and retract into the inner groove 68 to realize the one-way transmission function. Therefore, when the rotating ring 66 rotates clockwise, it will apply a steering force to the fixed ring 64 and the driving sprocket 62 through the locking part 69, thereby driving the fixed ring 64 and the driving sprocket 62 to rotate synchronously. The driving sprocket 62 drives the driven sprocket 61 and the rotating shaft to rotate through the chain, and with the transmission action of the connecting shaft 46 between the unloading racks 41, the receiving rollers 44 inside the unloading racks 41 on both sides rotate at a uniform speed in the unloading racks 41. The receiving rollers 44 have evenly distributed receiving grooves 45 that match the outer diameter of the sleeve 9. The rotation transports a section of sleeve 9 from the feeding hopper 42 to the inlet of the unloading pipe 43. Under the action of gravity, the sleeve 9 falls accurately into the upper and lower assembly grooves of the double-layer assembly rack 11 through the unloading pipe 43, completing the automatic feeding of the sleeve 9. After the sleeve 9 is loaded, the drive motor 31 rotates in the opposite direction. The operation process of each component is the opposite of the above. The drive motor 31 controls the drive gear 33 to rotate counterclockwise inside the mounting frame 7 through the drive shaft 32. The drive gear 33 drives the driven rack 34 and the receiving frame 10 to move linearly in the direction of the conveying groove 22 and the entry groove 213, so that the receiving frame 10 passes through the entry groove 213 and accurately enters the preset position inside the conveying groove 22. During this process, the worm gear 35 drives the worm 37 to rotate forward between the fixed seats 36. The worm 37 drives the rotating ring 66 to rotate counterclockwise inside the fixed ring 64 through the control shaft 67. At this time, the inclined surface of the locking member 69 contacts the inclined surface of the corner groove 65 on the inner wall of the fixed ring 64, which will compress the return spring 63 and enter the inner groove 68, so that the control shaft 67 and the rotating ring 66 rotate freely inside the fixed ring 64, and the drive sprocket 62 remains stationary, thereby preventing the feeding mechanism 4 from accidentally feeding during the forward movement of the receiving frame 10, and realizing the logic control of "feeding when the receiving frame 10 retracts and not feeding when the receiving frame 10 moves forward". As the receiving frame 10 enters the conveying trough 22, the control push rod 25 drives the moving seat 26, the push seat 28, and the positioning shaft 210 to retract into the mounting trough 27, so that the push seat 28 retracts into the through trough 211, and the positioning shaft 210 slides in the positioning trough 212. At this time, the inner link 8 in the conveying trough 22 falls to the outer wall of the bearing area 14 at the left end of the receiving frame 10 under the action of gravity and fits against it. The inner link 8 in the conveying trough 22 is vertically separated by the partition plate 23 to prevent the corresponding inner link 8 from contacting each other, ensuring that only two corresponding inner link 8 enter the assembly area at a time. When the inner link 8 falls into the area where the U-shaped frame 24 is located, it forms an independent assembly station. The opening width of the U-shaped frame 24 matches the width of the inner link 8. The two axis lines of the inner link 8 always remain horizontal and parallel to each other. At the same time, the outer side of the inner link 8 slides against the inner wall of the conveying groove 22 and the sealing plate 21, respectively, further restricting the rotation and offset of the inner link 8. After the inner link 8 enters the assembly area and completes its initial positioning, the control push rod 25 pushes the moving seat 26 to move towards the conveying groove 22. The positioning shaft 210 slides smoothly along the inside of the positioning groove 212 to ensure that the moving direction of the push seat 28 is perpendicular to the axis of the inner link 8. After the push seat 28 passes through the through groove 211, it quickly and smoothly separates the inner link 8 being assembled and the inner link 8 to be assembled by the guiding action of the guide angle 29 at its front end. Because the top and bottom of the inner link 8 are arc-shaped, the guide angle 29 of the pusher seat 28 can smoothly enter the gap between the two inner links 8 without damaging the surface of the inner link 8. When the pusher seat 28 continues to move forward, its top position will push the inner link 8 to be assembled upward, so that it is completely separated from the inner link 8 being assembled. At the same time, the bottom wall of the pusher seat 28 and the inner wall of the bearing area 14 form an upper and lower clamping structure, which implements rigid upper and lower limiting and fixing of the inner link 8 being assembled. Combined with the left and right limiting effect of the outer side of the inner link 8 with the inner wall of the conveying groove 22 and the sealing plate 21 respectively, it can form an all-round circumferential limiting and fixing of the inner link 8, ensuring that the inner link 8 will not have any displacement or rotation during the pressing process of the sleeve 9.

[0036] At this time, the hydraulic push rod 51 is activated to push the moving table 52 and the assembly push rod 54 to move forward inside the mounting frame 7. The moving table 52 drives the limit block 53 to slide along the inner wall of the corresponding limit groove 55 to ensure that the moving direction of the assembly push rod 54 is coaxial with the axis of the inner link 8. The assembly push rod 54 pushes the sleeve 9 in the upper and lower assembly slots of the double-layer assembly frame 11 to move towards the inner link 8 in a uniform and stable manner until the sleeve 9 is completely pressed into the axis hole of the inner link 8, thus completing the assembly of the sleeve 9 of one inner link 8. After assembly, each component returns to its initial position in the reverse order described above, ready for the assembly of the next inner link 8. By repeating the above workflow, this device can achieve fully automated continuous production of the inner link 8 and sleeve 9 assembly.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A precision assembly structure of a high wear-resistant conveying chain, comprising a feeding frame (1), characterized in that: The feeding rack (1) is fixed with a mounting frame (7) on the right side. The feeding rack (1) is equipped with a feeding mechanism (2) for graded conveying of the inner chain plate. The feeding mechanism (2) is uniformly fed with several inner chain links (8). The inner chain links (8) are arranged symmetrically and coaxially. A sleeve (9) is installed inside the mounting shaft of a pair of inner chain links (8). The mounting frame (7) has guide grooves (13) on the front and back sides of the left side of the inner wall. Guide blocks (12) are slidably installed on the inner wall of the guide grooves (13). The same support frame (10) is fixed between the guide blocks (12). The left end of the support frame (10) is the bearing area (14). The left end of the support frame (10) extends into the feeding mechanism (2) and forms a semi-circular bearing support with the bottom of the corresponding inner link (8). A double-layer assembly frame (11) is fixedly installed on the top of the support frame (10). The assembly groove in the double-layer assembly frame (11) is semi-circular and its height position is matched with the height of the inner link (8) mounting shaft as a concentric reference, so that the sleeve (9) can accurately enter the inner link (8) mounting shaft. The upper and lower layers of the double-layer assembly frame (11) are staggered for synchronously receiving the sleeve (9). The mounting frame (7) is equipped with a moving mechanism (3) on its outer wall, an interference fit mechanism (5) is installed on the right side of the mounting frame (7), a feeding mechanism (4) is installed on the top of the mounting frame (7), and a transmission mechanism (6) is installed on the right end of the feeding mechanism (4).

2. The precision assembly structure of a high wear-resistant conveyor chain according to claim 1, characterized in that: The interference fit assembly mechanism (5) includes a hydraulic push rod (51) fixedly installed on the right side of the mounting frame (7). The movable end of the hydraulic push rod (51) slides through the mounting frame (7) and is fixedly installed on a moving platform (52). An assembly push rod (54) is fixedly installed on the left side of the moving platform (52) and at the assembly slot position corresponding to the double-layer assembly frame (11). Limit blocks (53) are fixedly installed on the front and rear walls of the moving platform (52). Limit grooves (55) are opened on the front and rear parts of the right side of the inner wall of the mounting frame (7). The inner wall of the limit groove (55) is slidably connected to the outer wall of the limit block (53).

3. The precision assembly structure of a high wear-resistant conveyor chain according to claim 1, characterized in that: The feeding mechanism (2) includes a conveying groove (22) on the right side of the feeding frame (1). The bottom end of the conveying groove (22) is tilted at a large rearward angle. A sealing plate (21) is installed on the right side of the feeding frame (1) at the position corresponding to the conveying groove (22). An entry groove (213) is opened on the side wall of the sealing plate (21) at the position corresponding to the double-layer assembly frame (11). The inner walls of the conveying groove (22) and the entry groove (213) are in contact with the outer wall of the left end of the receiving frame (10). A mounting groove (27) is opened on the rear part of the outer wall of the feeding frame (1). A control push rod (25) is installed inside the mounting groove (27). A movable seat (26) is installed at the movable end of the control push rod (25). The movable seat (26) is located inside the mounting groove (27) and moves. A positioning shaft (210) is installed on the left side of the movable seat (26). A positioning groove (212) is opened on the left side of the inner wall of the mounting groove (27) at the position corresponding to the positioning shaft (210). The inner wall of the positioning groove (212) is slidably connected to the outer wall of the positioning shaft (210) to guide and limit the movement path of the movable seat (26).

4. The precision assembly structure of a high wear-resistant conveyor chain according to claim 3, characterized in that: A pusher seat (28) is installed on the right side of the movable seat (26). The pusher seat (28) has a guide angle (29) on the side near the conveying groove (22) to lift the upper inner link (8) during the assembly process. At the same time, the bottom wall of the pusher seat (28) abuts against the outer wall of the inner link (8) being assembled and limits its position. A through groove (211) is opened on the right side of the inner wall of the mounting groove (27) and at the position corresponding to the pusher seat (28). The inner wall of the through groove (211) is slidably connected to the outer wall of the pusher seat (28). A partition plate (23) is fixedly installed in the middle of the inner wall of the conveying groove (22) to grade and feed the inner link (8) to prevent mutual interference. A U-shaped frame (24) is fixedly installed in the inner wall of the conveying groove (22) and at the position corresponding to the entry groove (213) to form an assembly area for the inner link (8) to form a sleeve (9) assembly.

5. The precision assembly structure of a high wear-resistant conveyor chain according to claim 1, characterized in that: The moving mechanism (3) includes a drive motor (31) fixedly installed on the outer wall of the mounting frame (7). A drive shaft (32) is rotatably installed on the inner wall of the mounting frame (7). The front end of the drive shaft (32) is fixedly connected to the power shaft of the drive motor (31) through the mounting frame (7) via a bearing. A drive gear (33) is fixedly installed on the outer wall of the drive shaft (32). A driven rack (34) is fixedly installed on the bottom wall of the receiving frame (10). The drive gear (33) and the driven rack (34) are meshed. A worm gear (35) is fixedly installed on the rear end of the drive shaft (32) through the mounting frame (7) via a bearing. Fixed seats (36) are fixedly installed on both sides of the rear wall of the mounting frame (7). A worm (37) is rotatably installed between the fixed seats (36) via a bearing seat. The worm (37) is meshed with the worm gear (35) for transmission.

6. The precision assembly structure of a high wear-resistant conveyor chain according to claim 1, characterized in that: The feeding mechanism (4) includes a circular feeding frame (41) fixedly installed on both sides of the top of the mounting frame (7). The top of the feeding frame (41) is connected to a feeding hopper (42). The bottom of the feeding frame (41) is connected to a feeding pipe (43). The bottom of the feeding pipe (43) corresponds to the upper and lower assembly slots of the double-layer assembly frame (11). The inner wall of the feeding frame (41) is rotatably mounted with a receiving roller (44) through a rotating shaft. The outer surface of the receiving roller (44) is evenly provided with several receiving slots (45) for receiving the sleeve (9).

7. The precision assembly structure of a high wear-resistant conveyor chain according to claim 6, characterized in that: A connecting shaft (46) is rotatably installed between the unloading racks (41). Both ends of the connecting shaft (46) are fixedly connected to the rotating shaft of the receiving roller (44) through the unloading rack (41) via bearings, so that the receiving roller (44) can rotate at the same speed and in the same direction within the corresponding unloading rack (41). One end of the rotating shaft of one of the receiving rollers (44) is fixedly connected to the transmission mechanism (6) through the unloading rack (41) via bearings.

8. The precision assembly structure of a high wear-resistant conveyor chain according to claim 1, characterized in that: The transmission mechanism (6) includes a driven sprocket (61) fixedly installed on the outer end of the rotating shaft. A control shaft (67) is rotatably installed on the side wall of one of the fixed seats (36). One end of the control shaft (67) passes through the fixed seat (36) and is fixedly connected to the worm gear (37) through a bearing. A rotating ring (66) is fixedly installed on the outer wall of the control shaft (67). The top and bottom walls of the rotating ring (66) are provided with embedded grooves (68). Locking parts (69) are hinged in the inner walls of the embedded grooves (68). Return springs (63) are installed between the locking parts (69) and the embedded grooves (68). One end of the return spring (63) is fixedly connected to the locking parts (69), and the other end of the return spring (63) is fixedly connected to the embedded grooves (68).

9. The precision assembly structure of a high wear-resistant conveyor chain according to claim 8, characterized in that: A fixed ring (64) is rotatably mounted on the outer wall of the rotating ring (66). The inner wall of the fixed ring (64) is evenly provided with a number of corner grooves (65), two of which are respectively engaged with the corresponding locking parts (69) for limiting. A drive sprocket (62) is fixedly mounted on the outer wall of the fixed ring (64). The outer wall of the drive sprocket (62) and the driven sprocket (61) are connected by the same chain drive.

10. A precision assembly method for a high wear-resistant conveyor chain, comprising a precision assembly structure for a high wear-resistant conveyor chain according to any one of claims 1-9, characterized in that: Includes the following steps; S1. Fix the device at the preset installation position, so that the conveying trough (22) is connected to the external inner chain link (8) feeding equipment and the feeding hopper (42) is connected to the external sleeve (9) feeding equipment. Confirm the initial state. The push seat (28) extends into the conveying trough (22) to isolate the inner chain link (8) to be assembled. The receiving frame (10) extends into the conveying trough (22) through the entry groove (213). S2. Start the drive motor (31) to rotate forward. Through the drive gear (33) and driven rack (34), drive the receiving frame (10) and double-layer assembly frame (11) to retract to the right and directly below the feed tube (43). At the same time, drive shaft (32) drives worm gear (35) and worm (37) to drive the drive sprocket (62) to rotate through rotating ring (66), locking part (69) and corner groove (65). Through chain, driven sprocket (61) and connecting shaft (46), the receiving roller (44) rotates and sends the two sleeves (9) into the upper and lower assembly slots of the double-layer assembly frame (11) respectively. S3, drive motor (31) reverses, driving the receiving frame (10) to the left through the entry groove (213) and into the conveying groove (22). At this time, the transmission mechanism (6) idles, the unloading mechanism (4) remains stationary, and the feeding mechanism (2) drives the push seat (28) to retract into the through groove (211). The inner chain link (8) in the conveying groove (22) falls to the left end bearing area (14) of the receiving frame (10) under the action of gravity. After being separated by the partition plate (23), it enters the U-shaped frame (24) assembly area to complete the centering. S4. The control push rod (25) pushes the moving seat (26) and the push seat (28) forward. The push seat (28) separates the inner link (8) to be assembled and the inner link (8) being assembled through the guide angle (29). Its top lifts the inner link (8) to be assembled. The bottom wall and the bearing area (14) cooperate to form upper and lower limits for the inner link (8) being assembled. Combined with the left and right limits of the conveying groove (22) and the sealing plate (21), the inner link (8) is fixed in all directions around the perimeter. S5. The hydraulic push rod (51) pushes the moving table (52) and the assembly push rod (54) forward. The two assembly push rods (54) press the sleeves (9) of the upper and lower layers of the double-layer assembly frame (11) into the two shaft holes of the inner link (8) at a uniform speed, thus completing the sleeve assembly of the single inner link (8). S6. The drive motor (31) rotates forward again, driving the receiving frame (10) to retract to the unloading position for the next sleeve (9) loading. At the same time, the push seat (28) retracts and the assembled inner chain link (8) is automatically discharged under the push of subsequent parts. The device repeats the above process to achieve continuous automated production.

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