A semi-automatic assembly tool for a chain

Abstract

The utility model discloses a kind of semi-automatic assembly tool of chain, including chassis and conveyer belt;Two feeding parts and a crimping part are provided on the chassis;The crimping part includes the crimping block slidingly connected right above the conveyer belt and two clamping blocks slidingly connected at the lower end of the crimping block;The conveyer belt outer periphery is provided with multiple partitions;Two guide plates are provided on the chassis;The four sides of outer link are simultaneously abutted with two adjacent partitions and two guide plates;The end of guide plate away from the crimping part is provided with chamfering.Automatic assembly for chain special chain of chain type elevator, realize the automatic high -efficient assembly of chain.The partition is used for the position accuracy control and accurate positioning of outer link, and the guide plate is used for rectification, improves position accuracy, helps to improve the crimping strength of outer link and chain plate.Reduces the amount of manual participation, improves the degree of automation, and further improves the assembly efficiency of chain.

Description

Technical Field

[0001] This utility model belongs to the technical field of chain hoists, and in particular relates to a semi-automatic assembly tool for chains. Background Technology

[0002] Chain elevators are widely used in various industries such as powder metallurgy, chemical industry, coal, and quartz sand. They are suitable for the vertical conveying or lifting of medium to large-sized and abrasive materials (such as limestone, cement clinker, gypsum, and lump coal). The chains used in chain elevators differ from conventional chains. Firstly, the overall volume and strength of the chains used in elevators are relatively large. Secondly, the chain plates in the elevator chains are not entirely the same and also differ from conventional chain plates. Some chain plates have extended ribs on both sides for installing chain hooks or buckets. Furthermore, because chain elevators are often custom-made to specific application scenarios and produced in large quantities, the production demand for their chains is often substantial.

[0003] Chinese patent document CN210498217U discloses an automatic chain assembly and inspection production line, including a production line workbench. An assembly table is fixedly connected to the top of the workbench, a conveyor belt is movably connected to the top of the assembly table, and a chain body is movably connected to the top of the conveyor belt. A riveting table is fixedly connected to the top of the workbench, and a vertical rod is fixedly connected to the top of the riveting table. A connecting shaft is fixedly connected to one end of the vertical rod, and a rotating wheel is movably connected to the outer wall of the connecting shaft. This automatic chain assembly and inspection production line, through its grooves, connecting rods, anti-slip pads, card seats, support blocks, slots, base plates, and cushions, achieves ease of use, solves the problem of inconvenience in using general production lines, provides better service to workers, improves work efficiency, accelerates production processes, meets user needs, and provides greater convenience.

[0004] The production line described in the aforementioned patented solution can only be used for the assembly and production of conventional chains. However, for the chains in chain elevators, because some of the chain plates have ribs extending to both sides for installing chain hooks and buckets, the chain plates are unstable when placed longitudinally. Furthermore, a large non-linear, non-uniform pressing force is required. Unstable pressing force and speed, as well as misalignment of the pressing position, will result in insecure pressing. On the other hand, the aforementioned patented solution requires manual placement of the chain body into the production line for riveting to achieve the final assembly process. The assembly of the chain body itself requires manual labor. Since a single chain has numerous components and is heavy and bulky, the assembly process is complex and labor-intensive, severely restricting the efficiency of chain assembly. Utility Model Content

[0005] To overcome the technical problems of existing technologies for assembling elevator chains, such as numerous and heavy chain components, high manual operation difficulty and workload, inconsistent chain plates with irregular appearance, poor and unstable positioning accuracy, and difficulty in accurately controlling the pressing force, thus hindering automated assembly and pressing, this utility model aims to provide a semi-automatic chain assembly fixture. By setting partitions and guide plates on the conveyor belt for positioning outer chain links, the fixture automatically completes the placement of inner chain links and the pressing of chain plates. This results in high and stable positioning accuracy of the outer chain links and more precise pressing force on the chain plates, improving pressing strength and success rate, and efficiently completing the automated assembly process.

[0006] To achieve the above objectives, this utility model employs the following technical solution: a semi-automatic chain assembly fixture, comprising a base frame and an intermittently rotating conveyor belt horizontally mounted on the base frame; two feeding sections and a pressing section are sequentially arranged on the base frame along the conveying direction of the conveyor belt; the two feeding sections are used to place outer chain links and inner chain links onto the conveyor belt; the pressing section includes a pressing block longitudinally slidably connected above the conveyor belt and two clamping blocks horizontally slidably connected to the lower end of the pressing block; the clamping blocks are used to press the chain plate onto the outer chain link; wherein, a plurality of partitions are evenly distributed along the conveying direction of the conveyor belt on the outer periphery of the conveyor belt; two parallel guide plates are symmetrically arranged on the base frame; the partitions are located between the two guide plates; the guide plates are located between the two feeding sections; the four sides of the outer chain link simultaneously abut against two adjacent partitions and two guide plates; the end of the guide plate away from the pressing section is chamfered near the partition.

[0007] The chain plate is press-fitted onto the outer chain link, essentially forming an interference fit between the chain plate and the outer chain link. Excessive pressing force, excessive pressing speed, or misalignment between the pin on the outer chain link and the hole on the chain plate will all reduce the strength of the interference fit or cause it to fail. Therefore, the most direct way to improve the assembly strength of the chain is to improve the positional accuracy and stability of the outer chain link and the chain plate, providing a benchmark for controlling the pressing force and enhancing the pressing strength and stability.

[0008] The outer link placed on the conveyor belt has two opposite sides that abut against the two adjacent partitions. As the conveyor belt moves, the outer link is corrected by the chamfer. Finally, the other two sides abut against the guide plate. The position of the outer link is accurately positioned and the positioning is stable and not easy to move.

[0009] Furthermore, a material conveyor is longitudinally arranged on the base frame, and multiple chain plates are sequentially and longitudinally slidably connected within the material conveyor; a support plate is horizontally slidably connected to the lower part of the material conveyor, and the support plate can be selectively moved to directly below the material conveyor or directly below the pressing block.

[0010] Specifically, the material conveyor includes a horizontally arranged outer frame, four longitudinally arranged legs at the lower end of the outer frame, and four longitudinally arranged columns at the upper end of the outer frame; each of the chain plates is distributed inside the outer frame and between the four columns; a push plate is provided on the upper side of the pallet away from the pressing block; a baffle is provided on the end of the push plate away from the pressing block; the height of the push plate is equal to the thickness of the chain plate; the push plate abuts against the lower end of the outer frame.

[0011] Specifically, a pusher cylinder is provided on the base frame; the support plate is provided on the moving end of the pusher cylinder; and the lower end of the baffle abuts against the upper end of the pusher cylinder.

[0012] The pallet has high and stable displacement accuracy, which can accurately deliver the chain plate between the two clamping blocks and assemble it onto the outer chain link under the pressure of the pressing block.

[0013] Preferably, a positioning groove is provided on the side of the lower end of the clamping block facing the other clamping block; the positioning groove and the push plate are located on the same horizontal plane; an opening is provided on the end of the positioning groove facing the push plate; a clearance groove is provided on the lower end of the pressing block between the two clamping blocks; the clearance groove is located above the two clamping blocks.

[0014] Furthermore, a lifting frame is longitudinally slidably connected to the upper end of the base frame; the conveyor belt is disposed on the lifting frame; a lead screw is longitudinally disposed at the lower end of the lifting frame; a handwheel is threadedly connected to the outer circumference of the lead screw; the handwheel abuts against the upper end of the base frame.

[0015] The longitudinal height of the conveyor belt can be adjusted to accommodate chains of different widths.

[0016] Specifically, of the two feeding sections, one feeding section is used to place the outer link between two adjacent partitions, and the other feeding section is used to place the inner link between two adjacent outer links.

[0017] Optionally, the feeding section can be manually or by a robotic arm.

[0018] Specifically, the pressing block is provided with two clamping cylinders; the clamping block is located on the moving end of the clamping cylinders.

[0019] Preferably, the partition is detachably connected to the conveyor belt; the inner circumference of the conveyor belt is provided with screws for installing the partition; the conveyor belt is provided with a plurality of evenly distributed array holes; the spacing between two adjacent partitions can be adjusted to adapt to the assembly requirements of different chains.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] 1. This utility model is used for the automatic assembly of special chains for chain elevators. Two feeding parts sequentially place the outer chain links and inner chain links flat on the conveyor belt, and finally press the chain plate onto the outer chain links to realize the automated and efficient assembly of the chain.

[0022] 2. This utility model sets up a spacer plate on the conveyor belt for positional accuracy control and precise positioning of the outer chain links, and sets up a guide plate for correcting the position of the outer chain links. This improves the relative positional accuracy between the outer chain links and the subsequent chain plates, which helps to improve the pressing strength of the outer chain links and chain plates, and improves the strength and quality of the chain.

[0023] 3. This utility model uses a robotic arm to automatically feed materials onto the conveyor belt. The pallet delivers the bottommost chain plate from the stacked layers to the lower end of the pressing block, where the pressing block presses the chain plate onto the outer chain link. This reduces manual intervention, improves the degree of automation, and thus improves the assembly efficiency of the chain. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the conveyor belt and lifting frame of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the pressing block and the support plate of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the pressing block and clamping block of this utility model;

[0028] Figure 5 This is a schematic diagram of the material conveyor and pallet of this utility model.

[0029] In the diagram: 11. Base frame; 12. Conveyor belt; 121. Partition plate; 13. Guide plate; 131. Chamfer; 14. Lifting frame; 15. Handwheel; 16. Lead screw; 17. Fuma wheel; 21. Raw material box; 22. Feeding section; 31. Outer link; 32. Inner link; 33. Chain plate; 41. First frame; 42. Pressing block; 421. Leaving groove; 43. Clamping cylinder; 44. Clamping block; 441. Positioning groove; 51. Second frame; 52. Feeding frame; 521. Outer frame; 522. Column; 523. Support leg; 53. Pallet; 531. Push plate; 54. Pushing cylinder; 55. Baffle. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In this description of the utility model, "a number" means two or more, unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, terms such as "set" and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] See Figures 1-5A semi-automatic assembly fixture for chains includes a base frame 11, a lifting frame 14 longitudinally slidably connected to the base frame 11, and a conveyor belt 12 horizontally arranged on the lifting frame 14. Two feeding sections 22 and a pressing section are sequentially arranged on the base frame 11 along the conveying direction of the conveyor belt 12. A lead screw 16 is longitudinally arranged at the lower end of the lifting frame 14; a handwheel 15 is threadedly connected to the outer circumference of the lead screw 16; the handwheel 15 abuts against the upper end of the base frame 11; a plurality of evenly distributed casters 17 are arranged at the lower end of the base frame 11. A raw material box 21 is arranged on one side of the feeding section 22.

[0035] The outer periphery of the conveyor belt 12 is provided with a plurality of partitions 121 evenly distributed along the conveying direction of the conveyor belt 12; two parallel guide plates 13 are symmetrically arranged on the base frame 11; the partition 121 is located between the two guide plates 13; the end of the guide plate 13 away from the pressing part is provided with a chamfer 131 near the partition 121; the guide plate 13 is located between the two feeding parts 22; of the two feeding parts 22, the first feeding part 22 is for manual feeding, used to place the outer link 31 between two adjacent partitions 121, and the second feeding part 22 is for continued manual feeding, used to place the inner link 32 between two adjacent outer link 31, that is, the two pins of the outer link 31 are respectively inserted into the corresponding inner link 32.

[0036] The crimping section includes a first frame 41 mounted on the base frame 11, a crimping block 42 longitudinally slidably connected to the first frame 41 and located directly above the conveyor belt 12, two horizontally arranged clamping cylinders 43 symmetrically arranged at the lower end of the crimping block 42, and two clamping blocks 44 respectively arranged on the two clamping cylinders 43; the first frame 41 is provided with crimping cylinders, and the crimping block 42 is arranged on the moving end of the crimping cylinder; the speed at which the crimping cylinder presses down on the crimping block 42 is non-uniform.

[0037] The pressing part also includes a second frame 51 mounted on the base frame 11, a material conveying frame 52 mounted longitudinally on the second frame 51, a pusher cylinder 54 mounted horizontally on the second frame 51, and a support plate 53 mounted on the moving end of the pusher cylinder 54.

[0038] The material conveyor 52 includes a horizontally arranged outer frame 521, four longitudinally arranged support legs 523 at the lower end of the outer frame 521, and four longitudinally arranged uprights 522 at the upper end of the outer frame 521; multiple chain plates 33 are respectively longitudinally and sequentially slidably connected between the inner side of the outer frame 521 and the four uprights 522; a push plate 531 is provided on the side of the upper end of the support plate 53 away from the pressing block 42; a baffle 55 is provided on the end of the push plate 531 away from the pressing block 42; the height of the push plate 531 is equal to the thickness of the chain plate 33; the upper end of the push plate 531 abuts against the lower end of the outer frame 521, and the lower end of the push plate 531 abuts against the upper end of the pushing cylinder 54.

[0039] The lower end of the clamping block 44 is provided with a positioning groove 441 facing the other clamping block 44; the positioning groove 441 and the push plate 531 are located on the same horizontal plane; the end of the positioning groove 441 facing the push plate 531 is provided with an opening; the lower end of the pressing block 42 is provided with a clearance groove 421 between the two clamping blocks 44; the clearance groove 421 is located above the two clamping blocks 44.

[0040] The partition 121 is detachably connected to the conveyor belt 12; screws for mounting the partition 121 are provided on the inner circumference of the conveyor belt 12; a plurality of evenly distributed array holes are provided through the conveyor belt 12; the spacing between two adjacent partitions 121 can be adjusted.

[0041] Workflow: On the intermittently rotating conveyor belt 12, when the conveyor belt 12 is stationary, the outer link 31 is manually placed onto the conveyor belt 12 and sequentially placed between two adjacent partitions 121. When the conveyor belt 12 rotates for transport, the outer link 31 between the partitions 121 is guided by the chamfer 131 to correct its placement, and the outer link 31 between the two guide plates 13 simultaneously abuts against the two guide plates 13 and the two partitions 121. Similarly, the robot arm places the inner link 32 onto two adjacent outer link 31, and the two pins on the outer link 31 are inserted into the holes of the inner link 32 respectively.

[0042] When the outer link 31 is driven by the conveyor belt 12 to directly below the pressing block 42, the pushing cylinder 54 extends, and the pushing plate 531 pushes the lowermost chain plate 33 of the conveyor frame 52 into the positioning groove 441 between the two clamping blocks 44. The baffle 55 prevents the upper chain plate 33 from sliding down. The two clamping cylinders 43 extend, the clamping blocks 44 clamp the chain plate 33, the pushing cylinder 54 retracts, and the pallet 53 moves to directly below the conveyor frame 52. The baffle 55 no longer prevents the chain plate 33 from falling, and the upper chain plate 33 falls onto the pallet 53. The pressing block 42 slides down, pressing the chain plate 33 between the two clamping blocks 44 onto the outer link 31. The two clamping cylinders 43 retract, causing the clamping blocks 44 to return to their original positions. The pressing block 42 slides up to its original position, and the two positioning grooves 441 are once again aligned with the pallet 53. This process is repeated.

[0043] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A semi-automatic assembly fixture for chains, characterized in that: The system includes a base frame and an intermittently rotating conveyor belt horizontally mounted on the base frame. Two feeding sections and a pressing section are sequentially arranged on the base frame along the conveying direction of the conveyor belt. The two feeding sections are used to place outer and inner chain links onto the conveyor belt. The pressing section includes a pressing block longitudinally slidably connected above the conveyor belt and two clamping blocks horizontally slidably connected to the lower end of the pressing block. The clamping blocks are used to press the chain plates onto the outer chain links. Multiple partitions are evenly distributed along the conveying direction of the conveyor belt around its outer periphery. Two parallel guide plates are symmetrically arranged on the base frame. The partitions are located between the two guide plates. The guide plates are located between the two feeding sections. The four sides of the outer chain link simultaneously abut against two adjacent partitions and two guide plates. The end of the guide plate away from the pressing section, near the partition, has a chamfer.

2. The assembly fixture as described in claim 1, characterized in that: A material conveyor is longitudinally arranged on the base frame, and multiple chain plates are sequentially and longitudinally slidably connected within the material conveyor; a support plate is horizontally slidably connected to the lower part of the material conveyor, and the support plate can be selectively moved to directly below the material conveyor or directly below the pressing block.

3. The assembly fixture as described in claim 2, characterized in that: The material conveyor includes a horizontally arranged outer frame, four longitudinally arranged legs at the lower end of the outer frame, and four longitudinally arranged columns at the upper end of the outer frame; each chain plate is distributed inside the outer frame and between the four columns; a push plate is provided on the upper side of the pallet away from the pressing block; a baffle is provided on the end of the push plate away from the pressing block; the height of the push plate is equal to the thickness of the chain plate; the push plate abuts against the lower end of the outer frame.

4. The assembly fixture as described in claim 3, characterized in that: A pusher cylinder is installed on the base frame; the support plate is installed on the moving end of the pusher cylinder; the lower end of the baffle abuts against the upper end of the pusher cylinder.

5. The assembly tooling as described in any one of claims 3-4, characterized in that: The lower end of the clamping block is provided with a positioning groove on the side facing the other clamping block; the positioning groove and the push plate are located on the same horizontal plane; the end of the positioning groove facing the push plate is provided with an opening; the lower end of the pressing block is provided with a clearance groove between the two clamping blocks; the clearance groove is located above the two clamping blocks.

6. The assembly tooling as described in any one of claims 1-4, characterized in that: The upper end of the base frame is longitudinally slidably connected to a lifting frame; the conveyor belt is mounted on the lifting frame; a lead screw is longitudinally mounted at the lower end of the lifting frame; a handwheel is threadedly connected to the outer circumference of the lead screw; the handwheel abuts against the upper end of the base frame.

7. The assembly tooling as described in any one of claims 1-4, characterized in that: Of the two feeding sections, one feeding section is used to place the outer link between two adjacent partitions, and the other feeding section is used to place the inner link between two adjacent outer links.

8. The assembly tooling as described in any one of claims 1-4, characterized in that: The feeding section is operated manually or by a robotic arm.

9. The assembly tooling as described in any one of claims 1-4, characterized in that: The pressing block is equipped with two clamping cylinders; the clamping block is located on the moving end of the clamping cylinders.

10. The assembly tooling as described in any one of claims 1-4, characterized in that: The partition is detachably connected to the conveyor belt; screws for mounting the partition are provided on the inner circumference of the conveyor belt; a plurality of evenly distributed array holes are provided through the conveyor belt; the spacing between two adjacent partitions can be adjusted.

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