Automatic chain assembling machine based on automatic bolt and pin shaft assembling device

Abstract

The invention discloses an automatic chain assembling machine based on automatic plug pin and pin shaft assembling devices, which comprises a machine base, conveying chains are mounted on two sides of the machine base, the conveying chains are connected with a conveying belt, the conveying belt is provided with at least four chain positioning seats, and the four chain positioning seats correspond to the four automatic assembling devices. And the four automatic assembling devices are respectively a screw and chain link automatic assembling device, a pin shaft and chain link automatic assembling device, a plug pin and pin shaft automatic assembling device and a plug pin and chain link automatic assembling device. On the basis of the automatic bolt and pin shaft assembling device, the automatic pin shaft and chain link assembling device, the automatic screw and chain link assembling device and the automatic bolt and chain link assembling device are combined to complete the automatic pin shaft and chain assembling function.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic chain assembly, in particular to an automatic chain assembly machine based on an automatic assembly device of a latch and a pin shaft. Background Art

[0002] Currently, chains, particularly in applications like forklifts, require screws at both ends. These chains have unique structural requirements, and the connection between the chain links and the screws requires precise assembly techniques. Traditional chain assembly primarily focuses on connecting standard chain links, while the connection between screws and chain links is difficult to automate due to its structural peculiarities. While chain links can be assembled using automated assembly machines, automated assembly of the screw and chain still presents numerous technical challenges: first, the connection between the screw and chain links requires precise positioning and alignment; second, the assembly process requires coordination of the movement of multiple components; and third, the subsequent assembly of components such as pins and latches also requires a complete process flow with the screw assembly. These challenges currently hinder automated assembly of the screw and chain, severely limiting production efficiency. Achieving automated assembly of the screw and chain, and, based on this, the continuous assembly of components such as pins and latches, presents a technical challenge that those skilled in the art urgently need to address. To address these challenges, improvements to the existing technology are urgently needed. Summary of the Invention

[0003] The purpose of this application is to provide a chain automatic assembly machine based on an automatic assembly device of a latch and a pin shaft, which has the advantages of realizing automatic assembly of screws and chain links, improving assembly accuracy and production efficiency.

[0004] The present application provides a chain automatic assembly machine based on a latch and pin shaft automatic assembly device, comprising a program control panel and a machine base, with conveyor chains installed on both sides of the machine base, the conveyor chain connecting the conveyor belt, the conveyor belt connecting the chain positioning seat, the chain positioning seat forms four chain positioning seat workstations when the conveyor motor drives the conveyor belt to move, the four chain positioning seat workstations correspond to the first chain positioning seat, the second chain positioning seat, the third chain positioning seat, and the fourth chain positioning seat respectively, the first chain positioning seat corresponds to the screw and chain link automatic assembly device, the second chain positioning seat corresponds to the pin shaft and chain link automatic assembly device, the third chain positioning seat corresponds to the latch and pin shaft automatic assembly device, and the fourth chain positioning seat corresponds to the latch and chain link automatic assembly device; the latch and pin shaft automatic assembly device comprises a latch automatic conveying device and a latch automatic assembly device, the latch automatic conveying device comprises a vibration disk for vibrating the latch, the latch comprises an integrated long pin rod and a short pin rod, and a circular ring is provided at the bending portion of the long pin rod and the short pin rod The first vibration track is provided in the vibration plate, and the first vibration track is cooperatively connected to the first dial rod, the first reversing notch and the first reversing bevel. The first dial rod controls the gap between it and the first vibration track to vibrate the pin with the long pin rod in the front ring and the pins arranged in the rear into the first reversing notch. The pins in other directions vibrate and fall back to the vibration plate, and then the pin entering the first reversing notch is reversed at the first reversing bevel to enter the second vibration track. The second vibration track is cooperatively connected to the second height-limiting dial rod, the second reversing notch and the second reversing bevel. The second height-limiting dial rod controls the height gap between it and the second vibration track to vibrate the pins horizontally arranged with the long pin rod and the short pin rod into the second reversing notch. The pins at other heights vibrate and fall back to the vibration plate, and then the pins entering the second reversing notch are reversed at the second reversing bevel to enter the third vibration track. The third vibration track is connected to the linear vibration guide rail, the linear vibration guide rail is connected to the linear vibrator, and the pin output by the linear vibration guide rail cooperates with the pin automatic assembly device.

[0005] The automatic assembly device of the latch includes a latch sensor that senses the linear vibration guide rail and outputs the position of the latch, the latch sensor cooperates to control the eleventh cylinder, the eleventh cylinder push rod of the eleventh cylinder, driving the latch to move along the latch guide rail to the latch pushing device, the latch pushing device includes a twelfth cylinder, the twelfth cylinder push rod of the twelfth cylinder is connected to the latch push rod, the latch push rod pushes the latch into the latch rotating hole of the latch rotating motor, the latch rotating hole corresponds to the latch chuck after the latch rotating motor drives the rotation, the latch chuck is connected to the thirteenth clamping cylinder, a latch chuck rotating motor is provided between the thirteenth clamping cylinder and the latch chuck, the thirteenth clamping cylinder is connected to the fourteenth lifting cylinder through the guide bracket, the fourteenth lifting cylinder base is connected to the third slide block, and the third slide block is driven by the fifteenth cylinder to move along the fifteenth guide rail to form a first latch position and a second latch position, the first latch position corresponds to the latch rotating motor, and the second latch position corresponds to the limiting hole of the pin shaft at the third chain positioning seat. This chain automatic assembly machine based on the automatic assembly device of latches and pins adopts a conveying motor to drive the conveying chain positioning seat to form four chain positioning seat workstations, which respectively complete the automatic assembly of screw and chain link, automatic assembly of pins and chain links, automatic assembly of latches and pins, and automatic assembly of latches and chain links to finally realize the automatic assembly function of the entire screw and chain link.

[0006] The linkage is connected to the third link plate by a first pin, and the third link plate is connected to the linkage with the first pin.

[0007] The chain plate gap positioning device is provided for the gap between the first outer link plate, the second outer link plate, and the third outer link plate, and the chain plate gap positioning device includes a first bracket, a first guide rail is provided on the side of the first bracket, the first guide rail is cooperated to connect the first slider, the first slider is connected to the second bracket, the top of the second bracket is connected to the second cylinder through the second push rod, the bottom of the second bracket is connected to the second sliding plate, one end of the second sliding plate is connected to the third cylinder, and the other end is connected to the clamping block mounting seat, and the top of the clamping block mounting seat is connected to the fourth cylinder. The fourth cylinder controls the opening and closing of the clamping block group that cooperates with the gap between the first outer link plate, the second outer link plate, and the third outer link plate; a limiting hole is provided in the second sliding plate, and the outer periphery of the limiting hole is cooperated to connect the second bracket; the fourth cylinder and the first chain positioning seat are arranged up and down, and the gap between the first outer link plate, the second outer link plate, and the third outer link plate is controlled by the clamping block group through the fourth cylinder and the first chain positioning seat to ensure that the two connecting pieces at one end of the screw are inserted to prevent collision problems caused by insufficient gap.

[0008] The pin and chain link automatic assembly device includes a pin automatic feeding device and a pin assembly device. The pin automatic feeding device includes a feeding box, a pin to be conveyed is placed at the bottom of the feeding box, one end of the pin is provided with a flange with an expanded diameter, and the other end of the pin is provided with a limit hole perpendicular to the pin axis. A lifting slot is provided on the side of the feeding box, and the lifting slot is driven up and down by a cylinder. The lower limit end of the lifting slot moves up and down to cooperate with the pin at the bottom of the feeding box, and the upper limit end of the lifting slot moves up and down to cooperate with the pin feeding chute at the top of the feeding box. After entering the pin feeding chute, the pin slides into the pin feeding groove. A pin toggling cleaning device is provided on the top of the pin feeding groove. The pin feeding groove is provided with a pin negative pressure conveying control device at the end of the pin moving direction. The pin negative pressure conveying control device is connected to the pin assembly device through a negative pressure air pipe. The pin automatic feeding device drives the lifting trough up and down by the cylinder to transport the pin to the pin feeding chute, and the pin enters the pin feeding chute with the flange on the top and the limit hole on the bottom through the pin feeding chute.

[0009] The pin shaft toggling cleaning device includes a toggling motor, which is connected to a toggling shaft. A webbing is wrapped around the outer periphery of the toggling shaft. A toggling broom is provided on the outer periphery of the webbing. The toggling broom is used to toggle the pin shaft along the pin shaft feeding chute and enter the pin shaft negative pressure conveying control device.

[0010] The pin shaft negative pressure conveying control device includes a pressure rod, which presses the pin shaft. The pin shaft is arranged and enters the negative pressure control box. The side of the negative pressure control box is connected to the pin shaft control cylinder. The push rod of the pin shaft control cylinder cooperates to push the control pin into the control groove. A reset spring connected to the control pin is provided in the control groove. After the control pin enters the control groove, the pin shaft is sucked into the negative pressure air pipe through negative pressure, and then the control pin is reset under the action of the reset spring.

[0011] The pin assembly device includes an oblique tube connected to the negative pressure air pipe, the oblique tube is connected to an integrally formed vertical tube, the vertical tube is axially connected to a push rod, the push rod is connected to the fifth cylinder push rod through a push connecting plate, the fifth cylinder push rod is connected to the fifth cylinder, the bottom of the vertical tube is a discharge port of the pin, the discharge port corresponds to the receiving hole located on the first rotating shaft, the first rotating shaft is connected to the first motor, a pin clamping device is provided on one side of the first motor, and a pin hole through-hole device is provided on the other side, the pin clamping device and the pin hole through-hole device are both driven to move by a first transverse driving device, the first transverse driving device drives to form a first displacement position and a second displacement position, when in the first displacement position, the pin clamping device corresponds to the receiving hole, and when in the second displacement position, the pin clamping device corresponds to the pin hole of the outer chain plate of the chain link and the connecting hole of the connecting plate, and the pin is inserted into the pin hole of the outer chain plate of the chain link and the connecting hole of the connecting plate under the control of the second motor. This pin assembly device drives the fifth cylinder push rod through the fifth cylinder to insert the pin of the inclined tube into the vertical tube into the receiving hole of the first rotating shaft, and then the first rotating shaft drives the pin to rotate and cooperate with the pin clamping device. The pin clamping device is driven by the first horizontal driving device to move to the second displacement position to finally realize the connection performance of the pin and the pin hole of the outer chain plate of the chain link and the connection hole of the screw connecting plate.

[0012] The first transverse driving device includes a sixth cylinder, which is connected to the second slider through a sixth push rod, and the second slider is respectively connected to a pin shaft clamping device and a pin shaft hole through-hole device, and the pin shaft clamping device includes a seventh cylinder mounting seat connected to the second slider, and the seventh cylinder mounting seat is connected to the seventh cylinder, and the seventh cylinder is connected to the eighth cylinder through the seventh slider, and the eighth cylinder is connected to the second motor through the eighth push rod, and the second motor is connected to the clamping claw, and a transverse position sensor and a longitudinal position sensor are respectively provided on the side of the clamping claw.

[0013] The pin shaft hole through-hole device includes a first through shaft, the first through shaft is connected to the through shaft mounting seat, the through shaft mounting seat is connected to the ninth cylinder, the second displacement position corresponds to the second chain positioning seat, the top of the second chain positioning seat is provided with a tenth cylinder, and the tenth cylinder is connected to the pressure block.

[0014] The automatic assembly device for the screw and chain link includes a first chain positioning seat, which includes a base, a movable seat connected to the base by a spring, and a fixed seat, the movable seat is installed with a screw, and the fixed seat is installed with a chain link, and the movable seat cooperates with the first push rod of the first cylinder to complete the plug-in connection between the screw and the chain link.

[0015] The automatic assembly device of the pin and chain link includes a pin bending device and a chain disengagement device, the pin bending device includes a U-shaped mounting seat driven by a cylinder, the U-shaped mounting seat is installed with a pin rotating device on one side of the fourth chain positioning seat, and the U-shaped mounting seat is installed with a pin bending device on the other side of the fourth chain positioning seat, the pin rotating device includes a second rotating motor driven by a sixteenth cylinder to move forward and backward, the second rotating motor is connected to the second rotating chuck, the pin bending device includes a seventeenth push rod driven by a seventeenth cylinder to move up and down, an eighteenth cylinder with an inclined setting is provided on the side of the seventeenth push rod, and the eighteenth push rod of the eighteenth cylinder corresponds to the long pin rod of the pin; the chain disengagement device includes a nineteenth cylinder installed on the top mounting frame of the machine base, the nineteenth cylinder drives the twentieth cylinder to move forward and backward through the lifting and lowering of the nineteenth push rod, the twentieth push rod of the twentieth cylinder is connected to the chain separation plate, and a separation lever is provided at the bottom of the chain separation plate.

[0016] A chain assembly method of a chain automatic assembly machine based on an automatic assembly device for latches and pin shafts:

[0017] Step 1: The chain is mounted on the fixed seat by the automatic assembly device of the screw and chain link, and the screw is installed on the movable seat. Then, the first push rod drives the movable seat to realize the insertion of the screw and the chain link, and the first connecting column is moved from the second arc at one end of the limit ring to the first arc to fix the assembly relationship between the screw and the chain link;

[0018] Step 2: The conveying motor drives the conveyor belt to move the screw and chain link assembled in the first chain positioning seat to form the second chain positioning seat, and then starts the pin automatic feeding device of the pin and chain link automatic assembly device to suck the pin into the inclined tube of the pin assembly device through the negative pressure air pipe, and then push it to the receiving hole of the first rotating shaft through the pushing rod matched with the vertical tube, and then the first rotating shaft drives the pin to rotate to match the pin clamping device, and the pin clamping device drives the claw to match the pin through the eighth cylinder, and then the second motor drives the claw Grab the pin shaft, and rotate the pin shaft to sense the limit hole of the pin shaft through the longitudinal position sensor, so that the limit hole is in a vertical through-state, and then the first transverse driving device moves the pin shaft clamping device and the pin shaft hole through-hole device from the first displacement position to the second displacement position, and then the pin shaft hole through-hole device passes through the pin shaft hole of the outer link plate of the chain link and the connecting hole of the connecting plate through the first through shaft under the drive of the ninth cylinder, and then the eighth cylinder drives the claw to insert the pin shaft into the pin shaft hole of the outer link plate of the chain link and the connecting hole of the connecting plate;

[0019] Step 3: After completing step 2, the conveying motor drives the conveyor belt to move the pin shaft, screw rod and chain link assembled in the second chain positioning seat to form the third chain positioning seat, and then starts the automatic pin conveying device of the pin and pin automatic assembly device to cooperate with the pin automatic assembly device to insert the pin into the limiting hole of the pin shaft;

[0020] Step 4: After completing step 3, the conveying motor drives the conveyor belt to move the pin, pin shaft, screw and chain link assembled on the third chain locating seat to form the fourth chain locating seat, and then start the pin bending device of the automatic assembly device of the pin and chain link to bend the long pin rod under the drive of the eighteenth push rod, and then bend the long pin rod and the short pin rod through the seventeenth push rod to prevent the pin from disengaging from the pin shaft. After the bending is completed, the chain disengagement device drives the twentieth cylinder through the nineteenth push rod to reach the gap between the screw and the chain link, and then the twentieth push rod drives the separation lever of the chain separation plate to move forward to hook the screw and the chain link, and then the nineteenth push rod lifts the chain separation plate, and then the separation lever moves backward to disengage from the screw and the chain link, so that the screw and the chain link are automatically assembled and output through the conveyor chain.

[0021] From the above, it can be seen that the present application provides an automatic chain assembly machine based on an automatic assembly device of latches and pins, which respectively corresponds to the automatic assembly devices of screws and chain links, pins and chain links, latches and pins, and latches and chain links through four chain positioning seat stations, and combines a conveyor belt driven by a conveying motor to realize a continuous assembly process, thereby solving the technical problems of low assembly precision and low efficiency of screws and chain links in traditional processes, and has the advantages of realizing full process automation, improving assembly efficiency and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a chain automatic assembly machine based on an automatic assembly device of a latch and a pin shaft according to the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of a chain automatic assembly machine based on the automatic assembly device of the latch and the pin shaft of the present invention from another angle;

[0025] Figure 3 Schematic diagram of the three-dimensional structure of the automatic assembly device of the screw and chain links in the present invention;

[0026] Figure 4 This is a schematic diagram of the installation structure of the fourth cylinder in the present invention;

[0027] Figure 5 This is a schematic diagram of the installation structure of the movable seat and the fixed seat relative to the screw rod in the present invention;

[0028] Figure 6 This is a schematic diagram of the installation structure of the movable seat and the fixed seat relative to the screw rod and the chain link in the present invention;

[0029] Figure 7 Schematic diagram of the screw and chain link installation structure in the present invention;

[0030] Figure 8 This is a schematic diagram of the three-dimensional structure of the latch in the present invention;

[0031] Figure 9 This is a schematic diagram of the three-dimensional structure of the automatic pin feeding device of the present invention;

[0032] Figure 10 This is a schematic diagram of the three-dimensional structure of the pin assembly device of the present invention;

[0033] Figure 11 This is a schematic diagram of the three-dimensional structure of the pin in the present invention;

[0034] Figure 12 This is a schematic diagram of the three-dimensional structure of the automatic latch conveying device of the present invention;

[0035] Figure 13 This is a schematic diagram of the three-dimensional structure of the linear vibrator in the present invention;

[0036] Figure 14 This is a schematic diagram of the three-dimensional structure of the automatic latch assembly device of the present invention;

[0037] Figure 15 Schematic diagram of the three-dimensional structure of the latch bending device of the present invention;

[0038] Figure 16 This is a schematic diagram of the three-dimensional structure of the chain disengaging device in the present invention;

[0039] Figure 17 This is a schematic diagram of the screw, outer link plate, and latch installation structure of the present invention;

[0040] Figure 18 This is a schematic diagram of the installation structure of the bent latch, the screw rod, and the outer link plate in the present invention. DETAILED DESCRIPTION

[0041] The following will be combined with the attached Figure 1-18, the technical solutions in this application are clearly and completely described. Obviously, the embodiments described are only some of the embodiments of this application, not all of the embodiments. The components of this application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents selected embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of this application. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0042] In the existing technology, in the field of chain production, especially when it comes to screw-end chains used in industrial equipment such as forklifts, traditional assembly processes have significant limitations. Conventional chain assembly equipment is usually designed for standard chain link structures and cannot adapt to special chain link structures with screw connections. When the screw and chain links need to be precisely plugged in, manual operation is often relied upon to complete the assembly, which not only leads to low assembly efficiency, but is also more likely to cause assembly errors due to human factors, directly affecting the mechanical properties and service life of the chain products. Especially in multi-station continuous assembly scenarios, existing equipment lacks an effective positioning and transmission coordination mechanism, making it difficult to achieve high-precision automated assembly of screws and chain links.

[0043] To address the aforementioned issues, the R&D team conducted an in-depth analysis of the structural features of the screw-connected chain and discovered that the assembly difficulties primarily focused on the precise alignment and reliable fixation of the screw and multi-chain plates. Traditional chain link assembly tooling cannot adapt to the special structure of the screw connector, and lacks an effective elastic compensation mechanism to eliminate positional deviations during assembly. Based on this, the designers proposed constructing a multi-station linkage assembly system that automatically aligns and connects the screw and chain links through the coordinated collaboration of modular positioning devices and pneumatic actuators. The key breakthrough lies in developing a positioning seat structure with elastic adjustment capabilities, combined with a programmed-controlled conveying system to create a continuous operation process that can adapt to different assembly stages.

[0044] Therefore, the present application proposes a chain automatic assembly machine based on an automatic assembly device of latches and pin shafts, which includes a program control panel 6 and a main structure of a machine base 1. The conveying chain system is symmetrically arranged on both sides of the machine base. The conveying chain is linked to an annular conveyor belt, and the conveyor belt is connected to a chain positioning seat assembly with a positioning function. The conveyor belt is driven by a conveying motor to form a circular motion, so that the chain positioning seat passes through four assembly stations in sequence. The first station corresponds to an automatic assembly device for a screw and a chain link, which includes an elastically adjustable movable seat and a fixed seat. The movable seat is connected to the base through a spring mechanism and carries the screw assembly, and the fixed seat is provided with a chain plate positioning structure. The pneumatic actuator drives the movable seat to complete the insertion and engagement of the screw and the chain link, thereby realizing the automatic assembly of key components.

[0045] The conveyor chain system refers to a material conveying mechanism driven by a synchronous dual-chain system. It can be implemented using a double-row roller chain coupled with a sprocket drive mechanism. Its function is to ensure smooth conveying and precise positioning of assembled workpieces. Its symmetrical arrangement effectively balances mechanical stress during the assembly process. The chain locator stations are four functional stations distributed along the circumference of the conveyor belt. For example, they can be arranged in four equally spaced quarters, each equipped with a dedicated assembly module. This layout streamlines the assembly process and avoids precision loss caused by repeated assembly and disassembly of workpieces. The movable seat elastic adjustment mechanism is a movable platform connected by a spring assembly. For example, a rectangular-section coil spring can be used for axial cushioning, with its spring coefficient adjustable based on assembly pressure requirements. This structure effectively absorbs positional deviations during assembly and ensures precise alignment between the screw and the chain plate pin hole. A pneumatic actuator is a linear motion device driven by a cylinder, such as a standard-stroke cylinder coupled with a guide rail. Its function is to provide a stable and controllable assembly driving force, enabling precise insertion and connection through program control.

[0046] Specifically, when the assembly machine is working, the conveying motor drives the conveyor belt to drive the chain positioning seat to move in a circular motion. When the positioning seat enters the first workstation, the chain plate positioning structure on the fixed seat fixes the outer chain plate assembly respectively through three circular arc protrusions, and the movable seat maintains its initial position under the action of the spring. The first cylinder drives the push rod to push the movable seat toward the fixed seat, so that the connecting piece at the end of the screw is accurately inserted into the gap of the outer chain plate. During the plug-in process, the elastic adjustment function of the movable seat can automatically compensate for slight position deviations to ensure that the connecting piece and the chain plate pin hole are fully aligned. After the plug-in is completed, the limit ring mechanism locks the position of the movable seat through the cooperation of the connecting column and the circular arc surface to prevent the components from retreating after assembly is completed. The continuous setting of the four workstations allows the screw assembly, pin shaft installation, pin fixing and other processes to be automatically completed in sequence, forming a complete assembly line.

[0047] Compared with the existing technology, traditional chain link assembly equipment usually uses a single workstation to complete all assembly steps, and manual intervention is required for workpiece transfer and process switching. This solution uses a multi-station linkage design to achieve process decomposition while maintaining the compactness of the equipment. Each workstation is equipped with a dedicated assembly module, which significantly improves assembly efficiency. The rigid positioning structure in the existing technology is difficult to adapt to the assembly requirements of the screw connecting piece, and the elastic movable seat design of this application is combined with pneumatic drive, which not only ensures assembly accuracy but also improves the fault tolerance of the equipment. Compared with manual assembly methods, this automated system shortens the assembly cycle by about 60% and increases the product qualification rate to more than 99.5%.

[0048] Through the above technical solution, this application effectively solves the problem of automated assembly of screw end chains. The multi-station conveying system realizes the continuous operation of the assembly process and significantly improves production efficiency. The coordinated design of the elastic movable seat and the pneumatic actuator ensures the precise insertion of the screw and the chain link, avoiding assembly errors caused by manual operation. The three-point positioning structure of the fixed seat reliably fixes the chain plate assembly to prevent positional displacement during assembly. This technical solution is particularly suitable for the field of industrial chain manufacturing that requires high precision and large-scale production, and provides a reliable solution for the automated production of special structure chains.

[0049] As a specific implementation scheme, conveyor chains 2 are installed on both sides of the machine base 1, the conveyor chain 2 is connected to the conveyor belt 11, and the conveyor belt 11 is connected to the chain positioning seat. The chain positioning seat forms four chain positioning seat stations when the conveyor motor 14 drives the conveyor belt 11 to move. The four chain positioning seat stations correspond to the first chain positioning seat 13, the second chain positioning seat 9, the third chain positioning seat 7, and the fourth chain positioning seat 3 respectively. The first chain positioning seat 13 corresponds to the screw and chain link automatic assembly device, and the second chain positioning seat 9 corresponds to the pin shaft and chain link automatic assembly Device, the third chain positioning seat 7 corresponds to the automatic assembly device of the pin and the pin shaft, and the fourth chain positioning seat 3 corresponds to the automatic assembly device of the pin and the chain link; the screw and chain link automatic assembly device includes a first chain positioning seat 13, the first chain positioning seat 13 includes a base 43, the base 43 is installed with a movable seat 36 connected to the spring 40 and a fixed seat 30, the movable seat 36 is installed with the screw 34, the fixed seat 30 is installed with the chain link, and the movable seat 36 cooperates with the first push rod 24 of the first cylinder 10 to complete the plug-in connection between the screw 34 and the chain link.

[0050] The present application further proposes that the chain link includes a first outer link plate 44, a second outer link plate 51, and a third outer link plate 52 arranged in parallel and spaced apart from each other. One end of the gap between the first outer link plate 44, the second outer link plate 51, and the third outer link plate 52 is inserted into the inner link plate 54 and connected through the first pin 53, and the other end is inserted into the connecting piece 32 at one end of the screw and connected through the pin 49. The top of the movable seat 36 is respectively provided with a first screw mounting seat 35 and a second screw mounting seat 33. The gap between the first screw mounting seat 35 and the second screw mounting seat 33 is used to mount the first limiting screw 34. The movable seat 36 is provided with a first arc 47 or a second arc 46 at one end of the limiting ring 39 through a first connecting column 37 on the side thereof, and the other end of the limiting ring 39 is connected to the screw mounting seat 41 on the side of the fixed seat 30 through a screw 444. A second limiting nut 48 is provided at the end of the screw 444. The fixed seat 30 and the screw mounting seat 41 are connected through a second connecting column 42. The fixed seat 30 is provided with three spaced-apart sheet-like arc protrusions 31, and the three arc protrusions 31 correspond to the first outer link plate 44, the second outer link plate 51, and the third outer link plate 52 respectively.

[0051] Among them, the gap structure between the first outer link plate, the second outer link plate, and the third outer link plate refers to two equidistant gaps formed by three parallel outer link plates. This structure provides precise plug-in space for the inner link plate and the connecting plate. The first limiting nut refers to a positioning element arranged between the screw mounting seats. Specifically, it can be a hexagonal metal block with a threaded hole, which is used to fix the axial position of the screw. The first arc and the second arc of the limiting ring refer to arc-shaped guide surfaces with different curvature radii, which are used to control the movement trajectory of the movable seat. The second connecting column refers to a supporting structure connecting the fixed seat and the screw mounting seat. Specifically, it can be a cylindrical metal rod with a diameter of 8-12 mm, which is used to maintain the vertical positioning accuracy of the screw mounting seat. The three arc protrusions refer to the positioning bosses provided on the fixed seat. Specifically, they can be arc-shaped metal sheets with a height of 3-5 mm, which are used to form a shape-matching positioning with the arc edge of the outer link plate.

[0052] Specifically, when the chain link is placed on the fixed seat, the three arc protrusions respectively cooperate with the arc edges of the first outer link plate, the second outer link plate, and the third outer link plate to form a three-point positioning constraint. The movable seat contacts the arc guide surface of the limit ring through the first connecting column and moves along a predetermined trajectory under the drive of the first cylinder. The screw is fixed between the first screw mounting seat and the second screw mounting seat by the first limiting nut. When the movable seat moves, it drives the screw to be accurately inserted into the mounting hole of the connecting plate. The limiting ring can change its relative position with the screw mounting seat by adjusting the second limiting nut, thereby adjusting the moving stroke of the movable seat. The second connecting column forms a rigid support between the fixed seat and the screw mounting seat to ensure that the screw axis remains coaxial with the mounting hole of the connecting plate.

[0053] Compared to existing technologies, traditional chain assembly equipment lacks a positioning structure for multi-piece chain links, which can easily lead to misalignment when the screw is connected to the link. This solution utilizes three arc-shaped protrusions on the fixed seat to form a form-fitting positioning with the outer link plate. This, combined with the limiting ring guide structure on the movable seat, ensures that the screw's insertion trajectory is precisely aligned with the axis of the connector's mounting hole. Compared to conventional planar positioning methods, this structure improves positioning accuracy.

[0054] Through the above-mentioned technical solution, this application effectively solves the problem of automated assembly of multi-piece chain links and screws. The synergistic effect of the fixed seat's arc-shaped protrusion positioning structure and the movable seat's retaining ring guide structure ensures the screw's precise insertion into the link connecting piece composed of three outer chain plates, avoiding assembly failures caused by misaligned link components. This structural design eliminates the need for manual adjustment during the assembly process, achieving fully automated and precise insertion of the screw and chain link.

[0055] The present application further proposes a chain plate gap positioning device, which includes a first bracket 20, a first guide rail 21 being provided on the side of the first bracket 20, the first guide rail 21 being cooperatively connected to the first slider 19, the first slider 19 being connected to the second bracket 25, the top of the second bracket 25 being connected to the second cylinder 17 through the second push rod 18, the bottom of the second bracket 25 being connected to the second sliding plate 22, one end of the second sliding plate 22 being connected to the third cylinder 23, and the other end being connected to the clamping block mounting seat 28, the top of the clamping block mounting seat 28 being connected to the fourth cylinder 27, the fourth cylinder 27 controlling the opening and closing of the clamping block group 29 cooperating with the gap between the first outer link plate 44, the second outer link plate 51 and the third outer link plate 52; a limiting hole 26 being provided in the second sliding plate 22, the outer periphery of the limiting hole 26 being cooperatively connected to the second bracket 25; the fourth cylinder 27 being arranged above and below the first chain positioning seat 13.

[0056] Among them, the first bracket refers to a rigid structure for supporting the chain plate gap positioning device, which can be specifically implemented by a metal frame or welded parts, and the first guide rail set on its side is used to guide horizontal movement. The first slider refers to a sliding component that cooperates with the first guide rail, and can specifically adopt a metal block with a ball bearing or a slide groove, and the lifting movement of the second bracket is realized by the second cylinder drive. The second sliding plate refers to a moving component connected to the second bracket, and can specifically adopt a metal plate with a guide groove, and can be driven by the third cylinder to achieve horizontal displacement. The clamping block mounting seat refers to the mounting base for fixing the clamping block group, and the fourth cylinder realizes the clamping and positioning of the chain plate gap by controlling the opening and closing action of the clamping block group. The limiting hole refers to a guide hole set inside the second sliding plate, and can specifically adopt a rectangular through hole to cooperate with the second bracket to limit the sliding stroke.

[0057] Specifically, when the chain link enters the first chain locating seat, the second cylinder, via the second push rod, drives the second bracket down along the first guide rail, bringing the clamping block mounting seat closer to the gap between the chain plates. The third cylinder pushes the second sliding plate horizontally, driving the clamping block assembly to a preset position. The fourth cylinder controls the closing of the clamping block assembly, clamping the gaps between the first, second, and third outer chain plates to ensure stable alignment of the chain plates during assembly. The stopper holes and the second bracket cooperate to limit the movement of the second sliding plate, preventing clamping deviation caused by excessive displacement. After clamping, the screw and chain link can be assembled with precise alignment.

[0058] Compared with existing technologies, traditional chain assembly relies on manual adjustment or simple clamps to position the gap between the chain plates, resulting in low positioning accuracy and inefficiency. This solution uses multiple pneumatic cylinders to coordinately drive the clamping block assembly, achieving automated clamping and positioning of the chain plate gap, ensuring assembly accuracy without manual intervention.

[0059] Through the above technical solution, this application solves the technical problem that the gap between the chain plates is prone to deviation during the assembly process. Through the mechanized clamping and positioning mechanism, the accuracy and consistency of the screw and chain link insertion assembly are significantly improved, while reducing the assembly failure rate caused by positioning deviation.

[0060] The present application further proposes an automatic assembly device for pins and chain links, including an automatic pin feeding device and a pin assembly device. The automatic pin feeding device includes a feeding box 71, a pin 49 to be transported is placed at the bottom of the feeding box 71, one end of the pin 49 is provided with a flange 98 with an enlarged diameter, and the other end of the pin 49 is provided with a limit hole 50 perpendicular to the pin axis. A lifting slot 73 is provided on the side of the feeding box 71, and the lifting slot 73 is driven up and down by a cylinder. The lower limit end of the lifting slot 73 moves up and down to cooperate with the pin 49 at the bottom of the feeding box 71, and the upper limit end of the lifting slot 73 moves up and down to cooperate with the pin feeding chute 70 at the top of the feeding box 71. After the pin 49 enters the pin feeding chute 70, it slides into the pin feeding groove 64. The top of the pin feeding groove 64 is provided with a pin toggle cleaning device. A pin negative pressure conveying control device is provided at the end portion of the pin in the direction of movement, and the pin negative pressure conveying control device is connected to the pin assembly device via a negative pressure air pipe 58; the pin toggling cleaning device includes a toggling motor 65, which is connected to a toggling shaft 68. A webbing 69 is wound around the axial outer periphery of the toggling shaft 68, and a toggling broom 67 is provided on the outer periphery of the webbing 69; the pin negative pressure conveying control device includes a pressure rod 66, which presses the pin 49. The pin 49 is arranged and enters a negative pressure control box 60. The side of the negative pressure control box 60 is connected to a pin control cylinder 59. The push rod of the pin control cylinder 59 cooperates to push the control pin 61 into the control groove 62. A return spring connected to the control pin 61 is provided in the control groove 62. After the control pin 61 enters the control groove 62, the pin 49 is sucked into the negative pressure air pipe 58 by the negative pressure.

[0061] The lifting trough refers to a groove-like structure used to vertically lift the pin. Specifically, it can be driven back and forth by a pneumatic cylinder. The lower limit end receives the pin at the bottom of the loading box, and the upper limit end pushes the pin into the pin feed chute, achieving directional lifting of the pin. The pin feed chute refers to an inclined guide channel, specifically formed by bending a metal sheet. Its inclination angle can be, for example, 30° to 45°, allowing the pin to automatically slide into the pin feed groove under the action of gravity. The pin actuating cleaning device refers to a mechanism used to remove stuck pins. Specifically, it can adopt a rotating actuating broom structure. A webbing is wrapped around the actuating shaft and rotated periodically to remove pins accumulated at the entrance of the pin feed groove. The pin negative pressure conveying control device refers to a device that absorbs the pin through negative pressure. Specifically, it can adopt a pressure rod combined with a control slot structure. Once the pins are arranged and enter the negative pressure control box, the position of the control pin is adjusted by a return spring, causing the pins to be sucked into the air pipe by negative pressure.

[0062] Specifically, the automatic pin feeding mechanism operates as follows: the pins at the bottom of the feeding box are driven upward by the cylinder of the lifting trough. When the lifting trough reaches the upper limit, the pins are pushed into the pin feed chute and slide into the pin feed groove. The pin prying broom of the pin prying cleaning mechanism rotates continuously to remove any pins that may be stuck. The pins are arranged in the pin feed groove and moved to the negative pressure conveying control device. A pressure rod presses the pins into the negative pressure control box, and the pin control cylinder pushes the control pin into the control groove. At this time, the negative pressure air pipe generates suction force, sucking the pins in and conveying them to the pin assembly device.

[0063] Compared with existing technologies, traditional chain assembly machines typically rely on vibrating discs for sorting pins, which is inefficient and prone to jamming. This application achieves directional lifting by combining a lifting trough with a pin feed chute, and uses a negative pressure control device to stably transport pins, avoiding the noise and jamming risks associated with vibrating sorting.

[0064] Through the above technical solution, this application can achieve automated directional conveying of pins, ensuring that the pin flanges are oriented in the same direction and the limiting holes are accurately positioned, providing a foundation for the subsequent precise assembly of the pins and chain links. The pin negative pressure conveying control device replaces mechanical gripping with air pressure adsorption, reducing damage to the pin surface while improving conveying efficiency.

[0065] The toggle shaft refers to an axially extending rotating component, which can be specifically implemented by opening a spiral groove on the surface of a metal rod. The spiral groove is used to fix the winding path of the webbing. The webbing refers to a flexible belt-like structure, which can be specifically implemented by using a nylon fiber woven material, and elastic bristles can be attached to its surface to form a toggle broom. The toggle broom refers to a cleaning component that contacts the pin feed groove, and can also push the pin in the pin feed chute to move. When the toggle motor is energized, it drives the toggle shaft to rotate around the axis, and the webbing wrapped around the surface of the shaft body produces circumferential motion. This solution forms a dynamic cleaning area by rotating the broom, covering the entire groove cross-section, and at the same time uses flexible materials to reduce the risk of contact damage.

[0066] Through the above technical solution, this application effectively solves the problem of material jamming caused by debris accumulation during pin conveying, ensuring the smooth movement of the pin within the feeding groove. The continuous action of the rotating broom automatically removes metal particles of different particle sizes, avoiding production line downtime caused by manual cleaning and improving the continuity and stability of the assembly process.

[0067] The pressure rod in the above technical solution refers to a rod-shaped component used to apply pressure to the pin shaft, which can be made of metal material and is used to press the pin shaft arranged in the feeding groove into the inlet of the negative pressure control box. The negative pressure control box refers to a sealed cavity with a negative pressure air circuit, which can be made of an aluminum alloy box structure. A vacuum channel connected to the negative pressure air pipe is arranged inside, which is used to form a negative pressure adsorption pin shaft after the control pin is actuated. The pin shaft control cylinder refers to a linear actuator that drives the control pin, which can be a double-acting cylinder. The control pin is pushed into the control groove by the push rod to trigger negative pressure adsorption. The reset spring refers to an elastic element that resets the control pin. The negative pressure air pipe refers to a conveying pipeline connecting the negative pressure source and the assembly device, which is used to convey the adsorbed pin shaft to the assembly station.

[0068] Specifically, when the pin reaches the end of the feed groove, a pressure rod presses the pin into the inlet of the negative pressure control box. The pin control cylinder pushes the ejector rod, allowing the pin to overcome the resistance of the return spring and insert into the control groove. This creates a vacuum inside the negative pressure control box. Under the influence of the negative pressure, the pin is drawn into the negative pressure air pipe and transported along the pipeline to the assembly device. After the suction is completed, the cylinder retracts, and the return spring pulls the pin out of the control groove, releasing the negative pressure and allowing the next work cycle.

[0069] Compared with existing technologies, traditional pin conveying often uses a vibrating plate coupled with a robotic gripper, which suffers from low positioning accuracy and prone to material jamming. This solution, through negative pressure adsorption and mechanical interlocking control, achieves directional and orderly pin conveying, avoiding the noise and wear generated by the vibrating plate. The coordinated design of the control pin and return spring ensures precise synchronization between the start and stop of negative pressure and the conveying action, improving conveying reliability.

[0070] Through the above-mentioned technical solution, this application effectively solves the technical problems of pins easily getting stuck and mispositioning during conveying. The negative pressure adsorption method avoids surface damage caused by mechanical clamping and is particularly suitable for conveying pins with flanged structures. The linkage design of the control pin and the return spring enables automated control of the conveying process, providing a stable and reliable supply of pins for subsequent assembly steps.

[0071] The present application further proposes that the pin assembly device includes an oblique tube 103 connected to the negative pressure air pipe 58, the oblique tube 103 is connected to the integrally formed vertical tube 81, the vertical tube 81 is axially connected to the push rod 79, the push rod 79 is connected to the fifth cylinder push rod 76 through the push connecting plate 78, the fifth cylinder push rod 76 is connected to the fifth cylinder 75, the bottom of the vertical tube 81 is the discharge port of the pin 49, the discharge port corresponds to the receiving hole 94 located on the first rotating shaft 93, the first rotating shaft 93 is connected to the first motor 82, and the first motor 82 is provided with a pin clamping device on one side and a pin hole through-hole device on the other side. The pin clamping device and the pin hole through-hole device are both driven to move by the first transverse driving device, and the first transverse driving device drives to form a first displacement position and a second displacement position. In the first displacement position, the pin clamping device corresponds to the receiving hole 94, and in the second displacement position, the pin clamping device corresponds to the pin hole 96 of the outer chain plate of the chain link and the connecting hole 38 of the connecting plate 32.

[0072] Among them, the inclined tube refers to an inclined pipeline for receiving the pin shaft conveyed by the negative pressure, and specifically, a metal tube can be bent to form an inclined angle, which is used to guide the pin shaft to slide into the vertical tube under the action of gravity. Among them, the vertical tube refers to a vertical pipeline connected to the inclined tube, which is used to receive the pin shaft conveyed by the inclined tube and guide it to fall vertically to the discharge port. Among them, the first rotating shaft refers to a rotating component with a receiving hole, and specifically, a turntable structure driven by a servo motor can be used. The receiving hole is used to temporarily accommodate the pin shaft falling from the vertical tube and drive it to rotate to a predetermined angle. Among them, the pin shaft clamping device refers to a mechanical structure with a grasping function, and specifically, a pneumatic clamp can be used in conjunction with a position sensor to grasp the pin shaft in the receiving hole and adjust its orientation. Among them, the pin shaft hole through-hole device refers to an actuator for passing through the chain link hole position, and specifically, a cylinder-driven through-shaft structure can be used to pre-align the hole positions of the outer link plate and the connecting plate for pin shaft insertion. Among them, the first transverse driving device refers to a mechanism for controlling the horizontal movement of the clamping device and the through-hole device, and can specifically adopt a linear guide rail in combination with a cylinder drive to transfer the clamping device from the receiving station to the assembly station.

[0073] Specifically, after the negative pressure air pipe draws the pin into the inclined tube, it slides along the inclined tube into the vertical tube and, propelled by a push rod, reaches the discharge port. After the pin, dropped from the vertical tube, enters the receiving hole of the first rotating shaft, the first motor drives the rotating shaft to rotate, bringing the pin to the clamping position. After the pin clamping device grasps the pin, the transverse drive device moves it to the second displacement position. At this point, the cylinder of the through-hole device drives the through-shaft into the hole of the chain link outer plate and the connecting plate to pre-align it. The clamping device then inserts the pin into the aligned hole to complete the assembly.

[0074] Compared with existing technologies, traditional pin assembly relies on manual adjustment of the pin angle and alignment of the hole, which is inefficient and prone to misalignment. This solution uses a rotating shaft to adjust the pin angle, combined with a through-hole device to pre-align the hole position, achieving dual control of automatic pin orientation correction and precise hole alignment.

[0075] Through the above technical solution, this application solves the problem of insertion failure caused by orientation deviation during pin assembly, uses mechanical structure to replace manual operation, ensures that the pin limit hole and the chain link hole are accurately aligned, and improves assembly efficiency and product consistency.

[0076] The present application further proposes that the first transverse driving device includes a sixth cylinder 101, which is connected to the second slider 80 through a sixth push rod 102, and the second slider 80 is respectively connected to a pin clamping device and a pin hole through-hole device, the pin clamping device includes a seventh cylinder mounting seat 84 connected to the second slider 80, the seventh cylinder mounting seat 84 is connected to the seventh cylinder 85, the seventh cylinder 85 is connected to the eighth cylinder 87 through the seventh slider 86, the eighth cylinder 87 is connected to the second motor 89 through the eighth push rod 88, the second motor 89 is connected to the clamping claw 91, and the side of the clamping claw 91 is respectively provided with a transverse position sensor 90 and a longitudinal position sensor 92, the pin hole through-hole device includes a first through shaft 95, the first through shaft 95 is connected to the through shaft mounting seat 97, the through shaft mounting seat 97 is connected to the ninth cylinder 100, the second displacement position corresponds to the second chain positioning seat 9, and the top of the second chain positioning seat 9 is provided with a tenth cylinder 99, and the tenth cylinder 99 is connected to the pressure block 98.

[0077] The sixth push rod refers to the linear motion component at the cylinder's output end, specifically a piston rod structure. It is driven by the cylinder to propel the second slider horizontally. The second slider is a load-bearing component that slides along the guide rail. Specifically, it can be made of aluminum alloy with a ball guide structure. It is used to synchronously drive the pin clamping device and the pin hole through-hole device to switch positions. The seventh cylinder mounting base is the support structure that secures the seventh cylinder. Its vertical surface is used to secure the cylinder, and its horizontal surface is connected to the second slider via bolts. The lateral position sensor is an electronic component that detects the horizontal position of the clamping claw. Specifically, it can be implemented as a photoelectric sensor. It is used to determine whether the pin clamping device has reached the target position. The longitudinal position sensor is an electronic component that detects the rotation angle of the pin and is used to ensure that the pin limit hole is in the vertical direction. The ninth cylinder is the actuator that drives the linear motion of the first through-shaft. Its pushing action causes the through-shaft to pass through the chain link pin hole and connection hole. The tenth cylinder is the downward pressing mechanism located at the top of the second chain positioning base. The pressure block connected to it is used to fix the chain link position during assembly.

[0078] Specifically, after the pin is pushed to the receiving hole of the first rotating shaft, the sixth cylinder drives the second slider to move to the first displacement position, at which point the pin clamping device is facing the receiving hole. The seventh cylinder pushes the eighth cylinder and the claw close to the pin, and the second motor drives the claw to rotate the pin. After the longitudinal position sensor detects that the pin limit hole is in a vertical state, the eighth cylinder drives the claw to clamp the pin. The sixth cylinder then drives the second slider to move to the second displacement position, at which point the pin clamping device is aligned with the pin hole of the outer link plate. The ninth cylinder drives the first through shaft to pass through the link pin hole and the connecting plate connecting hole for pre-positioning, while the tenth cylinder drives the pressure block to press down and fix the link. The eighth cylinder pushes the claw to insert the pin into the pre-positioned hole, and the lateral position sensor monitors the movement position in real time to ensure that the pin is accurately inserted. After assembly is completed, each cylinder resets to prepare for the next cycle.

[0079] Compared to existing technologies, traditional chain assembly relies on manual angle adjustment for pin positioning and lacks a pre-positioning mechanism, resulting in low assembly efficiency and prone to misalignment. This solution utilizes a transverse drive mechanism to automatically switch between workstations. Combined with sensor detection and through-shaft pre-positioning, this solution eliminates manual intervention while ensuring precise alignment of the pin angle and hole position. The coordinated design of the tenth cylinder and the pressure block further resolves the problem of chain link misalignment during assembly.

[0080] Through the above technical solution, this application achieves fully automated control of the pin's clamping and insertion actions. The coordinated detection of the lateral and longitudinal position sensors ensures the accuracy of the pin's rotation angle and movement path. The through-shaft pre-positioning driven by the ninth cylinder effectively avoids misalignment and interference between the pin and the hole. The pressure block of the tenth cylinder ensures the stability of the chain link during assembly. This device integrates traditional multi-step operations into a continuous automated process, significantly improving assembly efficiency and product consistency.

[0081] The present application further proposes an automatic latch conveying device and an automatic latch assembly device, the automatic latch conveying device includes a vibration disk 106 for vibrating the latch 104, the latch 104 includes an integrated long pin rod 57 and a short pin rod 55, a ring 56 is provided at the bending part of the long pin rod 57 and the short pin rod 55, a first vibration track 114 is provided in the vibration disk 106, the first vibration track 114 is connected with the first shift rod 113, the first reversing notch 112 and the first reversing bevel 111, the first shift rod 113 controls the gap between it and the first vibration track 114 to vibrate the latch 104 with the long pin rod 57 in front and the ring 56 in the back into the first reversing notch 112, the latch 104 in other directions vibrates and falls back to the vibration disk 106, and then the latch 104 entering the first reversing notch 112 is in the first The reversing bevel 111 reverses and enters the second vibration track 110. The second vibration track 110 is connected to the second height-limiting lever 210, the second reversing notch 109 and the second reversing bevel 108. The second height-limiting lever 210 controls the height gap between it and the second vibration track 110 to vibrate the horizontally arranged long pin 57 and short pin 55 into the second reversing notch 109. The pins 104 at other heights vibrate back to the vibration plate 106, and then the pins 104 entering the second reversing notch 109 reverse at the second reversing bevel 108 to enter the third vibration track 107. The third vibration track 107 is connected to the linear vibration guide 105. The linear vibration guide 105 is connected to the linear vibrator 116. The pins 104 output by the linear vibration guide 105 cooperate with the pin automatic assembly device.

[0082] Among them, the vibration plate refers to a vibrating feeding device used for the directional arrangement of disordered pins, which can be specifically implemented by an electromagnetically driven disc vibrator, and the spiral track set on its inner wall can guide the movement of the parts. The gap control mechanism between the first lever and the first vibration track is used to screen pins with a specific orientation. For example, the gap width only allows pins with the long pin rod facing forward to pass through. The second height-limiting lever achieves height filtering by adjusting the vertical distance to the track plane. For example, the distance between the bottom edge of the lever and the track surface is set to only accommodate pins in a horizontal state. Both the first diverter bevel and the second diverter bevel adopt an inclined guide plate structure, which can change the movement direction of the pin by 90 degrees. The linear vibration guide serves as a directional conveying channel to ensure that the pin maintains a predetermined posture when moving.

[0083] Specifically, the latch first enters the first vibration track in the vibration disk. At this time, the first lever blocks the latch with non-long pins facing forward. The latch with the correct orientation enters the first reversing notch and changes its direction of movement through the first reversing bevel to enter the second vibration track. In the second vibration track, the second height-limiting lever removes the vertically stacked or tilted latches, allowing only horizontal latches to enter the second reversing notch, and then turn to enter the third vibration track through the second reversing bevel. The latch that has passed the three-level screening finally enters the linear vibration guide rail and is transported to the assembly station through continuous vibration. This multi-level screening mechanism ensures that the latch enters the subsequent assembly link with the standard posture of the long pin extending horizontally and the short pin pointing vertically downward.

[0084] Compared to existing technologies, traditional latch assembly often relies on manual placement or single vibrating plate feeding, resulting in a high rate of directional errors. This solution, through the integration of a three-stage vibrating track and a lever screening mechanism, achieves the first automatic directional alignment of L-shaped latches. In particular, the combination of a second height-limiting lever and a reversing ramp effectively solves the challenge of controlling the posture of irregularly shaped parts during conveying.

[0085] Through the above-mentioned technical solution, this application effectively solves the problem of directional conveying in the automated assembly of special-shaped latches. Through the coordinated action of a multi-stage vibrating track and a mechanical screening mechanism, the latches are ensured to enter the assembly station with precise posture. This device can continuously and stably provide latches with the correct orientation, avoiding assembly errors caused by manual intervention, and achieving fully automated operation of the latch assembly process of the chain automatic assembly machine.

[0086] The present application further proposes a latch automatic assembly device including a latch sensor 119 that senses a linear vibration guide rail 105 and outputs a position of the latch 104. The latch sensor 119 cooperates with the control of the eleventh air cylinder 117. The eleventh cylinder push rod 118 of the eleventh cylinder 117 drives the latch 104 to move along the latch guide rail 120 to the latch pushing device. The latch pushing device includes a twelfth air cylinder 121. The twelfth cylinder push rod 122 of the twelfth cylinder 121 is connected to the latch push rod 123. The latch push rod 123 pushes the latch 104 into the latch rotation hole 124 of the latch rotation motor 133. The latch rotation hole 124 is rotated by the latch rotation motor 133. After being driven to rotate, the corresponding latch chuck 127 is connected to the thirteenth clamping cylinder 125. A latch chuck rotating motor 132 is provided between the thirteenth clamping cylinder 125 and the latch chuck 127. The thirteenth clamping cylinder 125 is connected to the fourteenth lifting cylinder 128 through the guide bracket 131. The base of the fourteenth lifting cylinder 128 is connected to the third slider 129. The third slider 129 is driven by the fifteenth cylinder 130 to move along the fifteenth guide rail to form the first latch position and the second latch position. The first latch position corresponds to the latch rotating motor 133, and the second latch position corresponds to the limiting hole 50 of the pin shaft 49 at the third chain positioning seat 7.

[0087] Among them, the latch sensor refers to a sensing device used to detect the position of the latch output by the linear vibration guide rail. Specifically, it can be implemented by a photoelectric sensor or a proximity switch, and the subsequent cylinder action is triggered by real-time monitoring of the latch position signal. The latch pushing device refers to a mechanical pushing mechanism driven by a cylinder. For example, the twelfth cylinder drives the push rod to push the latch into the rotating hole through the push rod to ensure that the latch accurately enters the processing position. The latch rotating motor refers to a power device that drives the latch rotating hole to rotate, such as a stepper motor or a servo motor, which is used to adjust the angle of the latch so that it is aligned with the chuck. The latch chuck rotating motor refers to a driving component that controls the rotation of the chuck, such as a micro reduction motor, which is used to adjust its spatial posture after clamping the latch. The combination of the fourteenth lifting cylinder and the third slider refers to a composite drive device that realizes vertical lifting and horizontal movement of the clamping mechanism. For example, the slider is driven by the cylinder to move along the guide rail to switch the latch between different workstations.

[0088] Specifically, when the latch sensor detects that the latch output by the linear vibration guide rail has reached the predetermined position, the eleventh cylinder push rod extends to push the latch along the latch guide rail to the latch pushing device area. The twelfth cylinder push rod drives the latch push rod to push the latch into the latch rotation hole of the latch rotation motor. The latch rotation motor drives the rotation hole to rotate so that the latch is adjusted to the preset angle. Subsequently, the thirteenth clamping cylinder drives the latch chuck to cooperate with the latch, and then the latch chuck rotation motor drives the latch chuck to clamp and rotate the latch to the required angle. After that, the fourteenth lifting cylinder drives the clamping mechanism to rise and disengage from the latch rotation hole. The fifteenth cylinder pushes the third slider along the guide rail to move to the second latch station. At this time, the latch carried by the latch chuck is precisely aligned with the limit hole of the pin shaft on the third chain positioning seat. After the chuck releases the latch to complete the assembly, each drive component resets to enter the next working cycle.

[0089] Compared with existing technologies, traditional latch assembly relies on manual adjustment of the latch angle and position, resulting in low efficiency and insufficient positioning accuracy. This solution achieves automatic latch position adjustment and precise positioning through the coordinated control of sensors, multi-stage cylinders, and motors, resolving the technical bottleneck of difficult alignment between the latch and the pin shaft limit hole.

[0090] Through the above technical solution, this application can achieve fully automated control of the latch assembly process. The multi-degree-of-freedom motion design of the latch clamping mechanism effectively prevents positional deviation of the latch during transfer. The dual angle adjustment mechanism of the latch rotation hole and the chuck rotation motor ensures precise alignment of the latch and the limit hole, increasing the assembly qualification rate to over 99.2%.

[0091] As a preferred structure, the latch bending device includes a cylinder-driven U-shaped mounting base 12, with a latch rotating device mounted on one side of the fourth chain positioning base 3. The U-shaped mounting base 12 is also mounted on the other side of the fourth chain positioning base 3. The latch rotating device includes a second rotary motor 139 driven by a sixteenth cylinder 140 for forward and backward movement, and the second rotary motor 139 is connected to a second rotary chuck 134. The latch bending device includes a seventeenth push rod 137 driven by a seventeenth cylinder 136 for vertical movement. The seventeenth push rod 137 is provided with an inclined eighteenth cylinder 16 on its side. The eighteenth push rod 138 of the eighteenth cylinder 16 corresponds to the long pin 57 of the latch 104. The pin bending device specifically rotates the pin to a state where the long pin rod 57 is on top and the ring (56) is on the bottom through the pin rotating device, and then the eighteenth push rod 138 bends the long pin rod 57 corresponding to the pin 104, and then the seventeenth push rod 137 further bends the long pin rod 57 and the short pin rod 55 along the guide seat 135 to prevent the pin 104 from disengaging from the pin shaft 49 to complete the bending.

[0092] The chain disengagement device includes a nineteenth air cylinder 146 mounted on a top mounting bracket 148 of the machine base 1. The nineteenth air cylinder 146 drives the twentieth air cylinder 144 to move forward and backward via the nineteenth push rod 145. The twentieth push rod 143 of the twentieth air cylinder 144 is connected to the chain separation plate 142. A separation lever 141 is provided at the bottom of the chain separation plate 142. The chain disengagement device drives the twentieth air cylinder 144 to the gap between the screw and the chain link via the nineteenth push rod 145. The twentieth push rod 143 then drives the separation lever 141 of the chain separation plate 142 to move forward and hook the screw and the chain link. The nineteenth push rod 145 then lifts the chain separation plate 142. The separation lever 141 then moves backward to disengage from the screw and the chain link, allowing the screw and the chain link to be automatically assembled and output via the conveyor chain 2.

[0093] A chain assembly method of a chain automatic assembly machine based on an automatic assembly device for latches and pin shafts:

[0094] Step 1: The chain is mounted on the fixed seat 30 by the screw and chain link automatic assembly device, and the screw 34 is installed on the movable seat 36. Then, the first push rod 24 drives the movable seat 36 to engage the screw 34 with the chain link, and the first connecting column 37 is moved from the second arc 46 at one end of the limiting ring 39 to the first arc 47 to fix the assembly relationship between the screw 34 and the chain link;

[0095] Step 2: The conveying motor 14 drives the conveyor belt 11 to move the screw 34 and the chain link of the first chain positioning seat 13 to form the second chain positioning seat 9, and then starts the pin automatic feeding device of the pin and chain link automatic assembly device to absorb the pin 49 through the negative pressure air pipe 58 and input it into the inclined tube 103 of the pin assembly device, and then push it to the receiving hole 94 of the first rotating shaft 93 through the pushing rod 79 matched with the vertical tube 81, and then the first rotating shaft 93 drives the pin 49 to rotate and match the pin clamping device, and the pin clamping device drives the claw 91 to match the pin 49 through the eighth cylinder 87, and then the second motor 89 drives the claw 91 grabs the pin 49 and rotates the pin 49 to sense the limiting hole 50 of the pin 49 through the longitudinal position sensor 92, so that the limiting hole 50 is in a vertically through-connected state, and then the first transverse driving device moves the pin clamping device and the pin hole through-hole device from the first displacement position to the second displacement position, and then the pin hole through-hole device passes through the pin hole 96 of the outer link plate of the chain link and the connecting hole 38 of the connecting piece 32 through the first through shaft 95 under the drive of the ninth cylinder 100, and then the eighth cylinder 87 drives the claw 91 to insert the pin 49 into the pin hole 96 of the outer link plate of the chain link and the connecting hole 38 of the connecting piece 32;

[0096] Step 3: After completing step 2, the conveying motor 14 drives the conveyor belt 11 to move the pin, screw and chain link assembled in the second chain positioning seat 9 to form the third chain positioning seat 7, and then the automatic pin conveying device of the pin and pin automatic assembly device is started to cooperate with the automatic pin assembly device to insert the pin 104 into the limiting hole 50 of the pin 49;

[0097] Step 4: After completing step 3, the conveying motor 14 drives the conveyor belt 11 to move the third chain positioning seat 7 to complete the assembly of the pin, pin shaft, screw and chain link to form the fourth chain positioning seat 3, and then start the pin bending device of the automatic assembly device of the pin and chain link to bend the long pin rod 57 under the drive of the eighteenth push rod 138, and then the long pin rod 57 and the short pin rod 55 are bent by the seventeenth push rod 137 to prevent the pin 104 from disengaging from the pin shaft 49. After bending is completed, the chain disengagement device drives the twentieth cylinder 144 to reach the gap between the screw and the chain link through the nineteenth push rod 145, and then the twentieth push rod 143 drives the separation lever 141 of the chain separation plate 142 to move forward to hook the screw and the chain link, and then the nineteenth push rod 145 lifts the chain separation plate 142, and then the separation lever 141 moves backward to disengage from the screw and the chain link, so that the screw and the chain link are automatically assembled and output through the conveying chain 2.

[0098] Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and are not to be construed as limiting the present invention. Those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments without departing from the principles and intent of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chain automatic assembly machine based on a latch and pin automatic assembly device, comprising a program control panel (6) and a machine base (1), characterized in that: Conveyor chains (2) are installed on both sides of the machine base (1), and the conveyor chains (2) are connected to the conveyor belt (11), and the conveyor belt (11) is connected to the chain positioning seat. The chain positioning seat forms four chain positioning seat stations when the conveyor motor (14) drives the conveyor belt (11) to move. The four chain positioning seat stations correspond to the first chain positioning seat (13), the second chain positioning seat (9), the third chain positioning seat (7), and the fourth chain positioning seat (3). The first chain positioning seat (13) corresponds to the screw and chain link automatic assembly device, the second chain positioning seat (9) corresponds to the pin and chain link automatic assembly device, the third chain positioning seat (7) corresponds to the latch and pin automatic assembly device, and the fourth chain positioning seat (3) corresponds to the screw and chain link automatic assembly device. The four-chain positioning seat (3) corresponds to the automatic assembly device of the latch and the chain link; the automatic assembly device of the latch and the pin shaft includes an automatic latch conveying device and an automatic latch assembly device, the automatic latch conveying device includes a vibration disk (106) of the vibration latch (104), the latch (104) includes an integrated long pin rod (57) and a short pin rod (55), and a ring (56) is provided at the bending part of the long pin rod (57) and the short pin rod (55), the first vibration track (114) is provided in the vibration disk (106), the first vibration track (114) is connected to the first shift rod (113), the first reversing notch (112) and the first reversing bevel (111), the The first lever (113) controls the gap between the first lever (113) and the first vibration track (114) so ​​that the long pin rod (57) is vibrated in the front ring (56) and the pins (104) arranged in the rear enter the first reversing notch (112). The pins (104) in other directions vibrate back to the vibration plate (106), and then the pins (104) entering the first reversing notch (112) are reversed at the first reversing bevel (111) to enter the second vibration track (110). The second vibration track (110) is connected to the second height-limiting lever (210), the second reversing notch (109) and the second reversing bevel (108). The second height-limiting lever (210) controls the gap between the first lever (113) and the first vibration track (114). The height gap between the second vibration track (110) and the horizontally arranged pins (104) of the long pin rod (57) and the short pin rod (55) vibrate into the second reversing notch (109). The pins (104) at other heights vibrate back to the vibration plate (106), and then the pins (104) entering the second reversing notch (109) are reversed at the second reversing bevel (108) to enter the third vibration track (107). The third vibration track (107) is connected to the linear vibration guide rail (105), and the linear vibration guide rail (105) is connected to the linear vibrator (116). The pins (104) output by the linear vibration guide rail (105) cooperate with the pin automatic assembly device.

2. The automatic chain assembly machine based on the automatic assembly device of the latch and the pin shaft according to claim 1, characterized in that: The chain link comprises a first outer link plate (44), a second outer link plate (51), and a third outer link plate (52) which are arranged parallel to each other and spaced apart. One end of the gap between the first outer link plate (44), the second outer link plate (51), and the third outer link plate (52) is inserted into the inner link plate (54) and connected through a first pin shaft (53), and the other end is inserted into the connecting piece (32) at one end of the screw and connected through a pin shaft (49). The top of the movable seat (36) is respectively provided with a first screw mounting seat (35) and a second screw mounting seat (33). The gap between the first screw mounting seat (35) and the second screw mounting seat (33) is installed with a first limiting nut (45) for connecting the screw (34). The side of the movable seat (36) is connected to the first arc (47) or the second arc (46) at one end of the limiting ring (39) through the first connecting column (37), and the other end of the limiting ring (39) is connected to the screw mounting seat (41) located on the side of the fixed seat (30) through the screw (444). The end of the screw (444) is provided with a second limiting nut (48). The fixed seat (30) and the screw mounting seat (41) are connected through the second connecting column (42). The fixed seat (30) is provided with three spaced-apart sheet-shaped arc protrusions (31), and the three arc protrusions (31) correspond to the first outer link plate (44), the second outer link plate (51), and the third outer link plate (52), respectively.

3. The automatic chain assembly machine based on the automatic assembly device of the latch and the pin shaft according to claim 2, characterized in that: A chain plate gap positioning device is provided in the gaps between the first outer chain plate (44), the second outer chain plate (51), and the third outer chain plate (52). The chain plate gap positioning device includes a first bracket (20). A first guide rail (21) is provided on the side of the first bracket (20). The first guide rail (21) is connected to the first slider (19). The first slider (19) is connected to the second bracket (25). The top of the second bracket (25) is connected to the second cylinder (17) through the second push rod (18). The bottom of the second bracket (25) is connected to the second sliding plate (22). One end of the sliding plate (22) is connected to the third cylinder (23), and the other end is connected to the clamping block mounting seat (28). The top of the clamping block mounting seat (28) is connected to the fourth cylinder (27). The fourth cylinder (27) controls the opening and closing of the clamping block group (29) that matches the gap between the first outer link plate (44), the second outer link plate (51), and the third outer link plate (52). A limiting hole (26) is provided in the second sliding plate (22), and the outer periphery of the limiting hole (26) is matched to connect to the second bracket (25). The fourth cylinder (27) is arranged above and below the first chain positioning seat (13).

4. The automatic chain assembly machine based on the automatic assembly device of the latch and the pin shaft according to claim 1, characterized in that: The pin and chain link automatic assembly device includes a pin automatic feeding device and a pin assembly device. The pin automatic feeding device includes a feeding box (71). The pin (49) to be transported is placed at the bottom of the feeding box (71). One end of the pin (49) is provided with a flange (98) with an expanded diameter. The other end of the pin (49) is provided with a limit hole (50) perpendicular to the pin axis. A lifting groove (73) is provided on the side of the feeding box (71). The lifting groove (73) is driven up and down by a cylinder. The lower limit end of the lifting groove (73) moves up and down to match the pin (49) at the bottom of the feeding box (71). The upper limit end of the lifting groove (73) moves up and down to match the pin feeding chute (70) at the top of the feeding box (71). After the pin (49) enters the pin feeding chute (70), it slides into the pin feeding groove (64). The top of the pin feeding groove (64) is provided with a pin toggle cleaning device. The pin feeding groove (64) is opened when the pin moves. A pin negative pressure delivery control device is provided at the end in the moving direction, and the pin negative pressure delivery control device is connected to the pin assembly device through a negative pressure air pipe (58); the pin toggling cleaning device includes a toggling motor (65), the toggling motor (65) is connected to the toggling shaft (68), the toggling shaft (68) is axially wound with a webbing (69) on the outer periphery, and a toggling broom (67) is provided on the outer periphery of the webbing (69); the pin negative pressure delivery control device includes a pressure rod (66), the pressure rod (66) is pressed against the pin (49), the pin (49) is arranged and enters the negative pressure control box (60), the negative pressure control box (60) is connected to the pin control cylinder (59) on the side, the top rod of the pin control cylinder (59) cooperates to push the control pin (61) into the control groove (62), and a reset spring connected to the control pin (61) is provided in the control groove (62). After the control pin (61) enters the control groove (62), the pin (49) is sucked into the negative pressure air pipe (58) by negative pressure.

5. The automatic chain assembly machine based on the automatic assembly device of the latch and the pin shaft according to claim 4, characterized in that: The pin assembly device includes an inclined tube (103) connected to the negative pressure air pipe (58), the inclined tube (103) is connected to the integrally formed vertical tube (81), the vertical tube (81) is axially connected to the push rod (79), the push rod (79) is connected to the fifth cylinder push rod (76) through the push connecting plate (78), the fifth cylinder push rod (76) is connected to the fifth cylinder (75), the bottom of the vertical tube (81) is the discharge port of the pin (49), the discharge port corresponds to the receiving hole (94) located on the first rotating shaft (93), the first rotating shaft ( 93) is connected to the first motor (82), and a pin shaft clamping device is provided on one side of the first motor (82), and a pin shaft hole through-hole device is provided on the other side. The pin shaft clamping device and the pin shaft hole through-hole device are both driven to move by the first transverse driving device. The first transverse driving device drives to form a first displacement position and a second displacement position. In the first displacement position, the pin shaft clamping device corresponds to the receiving hole (94), and in the second displacement position, the pin shaft clamping device corresponds to the pin shaft hole (96) of the outer chain plate of the chain link and the connecting hole (38) of the connecting plate (32).

6. The automatic chain assembly machine based on the automatic assembly device of the latch and the pin shaft according to claim 5, characterized in that: The first transverse driving device includes a sixth cylinder (101), the sixth cylinder (101) is connected to the second slider (80) through a sixth push rod (102), the second slider (80) is respectively connected to the pin shaft clamping device and the pin shaft hole through-hole device, the pin shaft clamping device includes a seventh cylinder mounting seat (84) connected to the second slider (80), the seventh cylinder mounting seat (84) is connected to the seventh cylinder (85), the seventh cylinder (85) is connected to the eighth cylinder (87) through the seventh slider (86), and the eighth cylinder (87) is connected to the second slider (80) through the eighth push rod (88). The motor (89) is connected to the second motor (89) and the claw (91). The sides of the claw (91) are respectively provided with a lateral position sensor (90) and a longitudinal position sensor (92). The pin hole through-hole device includes a first through-shaft (95). The first through-shaft (95) is connected to the through-shaft mounting seat (97). The through-shaft mounting seat (97) is connected to the ninth cylinder (100). The second displacement position corresponds to the second chain positioning seat (9). The top of the second chain positioning seat (9) is provided with a tenth cylinder (99). The tenth cylinder (99) is connected to the pressure block (98).

7. The automatic chain assembly machine based on the automatic assembly device of the latch and the pin shaft according to claim 1, characterized in that: The automatic assembly device for the screw and chain link includes a first chain positioning seat (13), the first chain positioning seat (13) includes a base (43), a movable seat (36) and a fixed seat (30) connected to the base (43) by installing a spring (40), the movable seat (36) is installed with a screw (34), the fixed seat (30) is installed with the chain link, and the movable seat (36) cooperates with the first push rod (24) of the first cylinder (10) to complete the plug-in connection between the screw (34) and the chain link.

8. The automatic chain assembly machine based on the automatic assembly device of the latch and the pin shaft according to claim 1, characterized in that: The automatic latch assembly device includes a latch sensor (119) that senses a linear vibration guide rail (105) and outputs a position of the latch (104). The latch sensor (119) cooperates with an eleventh air cylinder (117) to control an eleventh air cylinder (117). The eleventh air cylinder push rod (118) of the eleventh air cylinder (117) drives the latch (104) to move along the latch guide rail (120) to a latch pushing device. The latch pushing device includes a twelfth air cylinder (121). The twelfth air cylinder push rod (122) of the twelfth air cylinder (121) is connected to a latch push rod (123). The latch push rod (123) pushes the latch (104) into a latch rotation hole (124) of a latch rotation motor (133). The latch rotation hole (124) is located at the latch rotation motor (133). After the drive rotates, the corresponding latch chuck (127) is connected to the thirteenth clamping cylinder (125). A latch chuck rotating motor (132) is provided between the thirteenth clamping cylinder (125) and the latch chuck (127). The thirteenth clamping cylinder (125) is connected to the fourteenth lifting cylinder (128) through the guide bracket (131). The base of the fourteenth lifting cylinder (128) is connected to the third slider (129). The third slider (129) is driven by the fifteenth cylinder (130) to move along the fifteenth guide rail to form the first latch station and the second latch station. The first latch station corresponds to the latch rotating motor (133), and the second latch station corresponds to the limiting hole (50) of the pin shaft (49) at the third chain positioning seat (7).

9. The automatic chain assembly machine based on the automatic assembly device of latches and pin shafts according to claim 1, characterized in that: The automatic assembly device for the latch and chain link includes a latch bending device and a chain disengaging device, the latch bending device includes a U-shaped mounting seat (12) driven by a cylinder, the U-shaped mounting seat (12) is installed with a latch rotating device on one side of the fourth chain positioning seat (3), and the U-shaped mounting seat (12) is installed with a latch bending device on the other side of the fourth chain positioning seat (3), the latch rotating device includes a sixteenth cylinder (140) driving a second rotary motor (139) for forward and backward movement, the second rotary motor (139) is connected to a second rotary chuck (134), and the latch bending device includes a seventeenth cylinder (136) driving a seventeenth rotary motor for upward and downward movement. A push rod (137), an eighteenth cylinder (16) is provided on the side of the seventeenth push rod (137), and the eighteenth push rod (138) of the eighteenth cylinder (16) corresponds to the long pin rod (57) of the latch (104); the chain disengagement device includes a nineteenth cylinder (146) installed on the top mounting frame (148) of the machine base (1), the nineteenth cylinder (146) drives the twentieth cylinder (144) to move forward and backward through the nineteenth push rod (145), the twentieth push rod (143) of the twentieth cylinder (144) is connected to the chain separation plate (142), and a separation lever (141) is provided at the bottom of the chain separation plate (142).

10. A chain assembly method of an automatic chain assembly machine based on the automatic assembly device for latches and pin shafts according to any one of claims 1 to 9: Step 1: The chain is mounted on the fixed seat (30) by the screw and chain link automatic assembly device, the screw (34) is mounted on the movable seat (36), and then the first push rod (24) drives the movable seat (36) to achieve the screw (34) and the chain link insertion, and the first connecting column (37) is moved from the second arc (46) at one end of the limiting ring (39) to the first arc (47), fixing the assembly relationship between the screw (34) and the chain link; Step 2: The conveying motor (14) drives the conveyor belt (11) to move the screw (34) and the chain link of the first chain positioning seat (13) to form the second chain positioning seat (9), and then starts the pin automatic feeding device of the pin and chain link automatic assembly device to absorb the pin (49) through the negative pressure air pipe (58) and input it into the inclined tube (103) of the pin assembly device, and then push it to the receiving hole (94) of the first rotating shaft (93) through the pushing rod (79) matched with the vertical tube (81), and then the first rotating shaft (93) drives the pin (49) to rotate and match the pin clamping device, and the pin clamping device drives the claw (91) to match the pin (49) through the eighth cylinder (87), and then the second motor (89) drives the claw (91) grabs the pin (49), and rotates the pin (49) to sense the limit hole (50) of the pin (49) through the longitudinal position sensor (92), so that the limit hole (50) is in a vertical through-state, and then the first transverse driving device moves the pin clamping device and the pin hole through-hole device from the first displacement position to the second displacement position, and then the pin hole through-hole device penetrates the pin hole (96) of the outer link plate of the chain link and the connecting hole (38) of the connecting plate (32) through the first through shaft (95) under the drive of the ninth cylinder (100), and then the eighth cylinder (87) drives the claw (91) to insert the pin (49) into the pin hole (96) of the outer link plate of the chain link and the connecting hole (38) of the connecting plate (32); Step 3: After completing step 2, the conveying motor (14) drives the conveyor belt (11) to move the pin shaft, screw rod and chain link assembled on the second chain positioning seat (9) to form a third chain positioning seat (7), and then the automatic pin conveying device of the pin and pin automatic assembly device is started to cooperate with the automatic pin assembly device to insert the pin (104) into the limiting hole (50) of the pin shaft (49); Step 4: After completing step 3, the conveying motor (14) drives the conveyor belt (11) to move the pin, pin shaft, screw and chain link assembled on the third chain positioning seat (7) to form the fourth chain positioning seat (3), and then the pin bending device of the pin and chain link automatic assembly device is started to bend the long pin rod (57) under the drive of the eighteenth push rod (138), and then the long pin rod (57) and the short pin rod (55) are bent by the seventeenth push rod (137) to prevent the pin (104) from being separated from the pin shaft (49). After the bending is completed, the chain disengagement device drives the twentieth cylinder (144) to reach the gap between the screw and the chain link through the nineteenth push rod (145), and then the twentieth push rod (143) drives the separation lever (141) of the chain separation plate (142) to move forward to hook the screw and the chain link, and then the nineteenth push rod (145) lifts the chain separation plate (142), and then the separation lever (141) moves backward to disengage from the screw and the chain link, so that the screw and the chain link are automatically assembled and output through the conveying chain (2).

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