An automated assembly line for swing cylinders and its assembly method

Abstract

This invention relates to the field of swing cylinder manufacturing technology, and particularly to an automatic assembly line and assembly method for swing cylinders, comprising: a worktable and a frame; a pallet assembly including a base plate and a tilting assembly; a stop assembly for limiting the position of the pallet assembly; a lifting assembly for lifting and positioning the base plate; a tilting drive assembly docked with the tilting assembly for driving the workpiece to tilt; a pressing assembly including a translation plate, a tightening assembly, and an engraving assembly, wherein the tightening assembly is used to tighten the end cap and center the output screw, and the engraving assembly is used to engrave lines on the end face of the output screw; and a first drive assembly for switching the positions of the tightening assembly and the engraving assembly. In this invention, the pallet assembly, the lifting assembly, and the tilting drive assembly form an automatic assembly line, ensuring the consistency of assembly parameters. The tightening assembly and the engraving assembly effectively control torque and rotation angle, achieving precise centering of the output screw's machined surface, avoiding human subjective factors, and improving the processing quality of subsequent processes.

Description

Technical Field

[0001] This invention relates to the field of swing cylinder manufacturing technology, and in particular to an automatic assembly line for swing cylinders and its assembly method. Background Technology

[0002] Currently, the assembly of swing cylinders is mainly done manually, with some parts still achieved by manual hammering. Due to the disadvantages of manual hammering assembly, the force is unstable, resulting in uneven output force, which may damage the inner wall of the cylinder. This makes it impossible to guarantee product quality and precision. Furthermore, before machining the eight holes on the end face of the output screw, the cylinder body is centered by visually observing the reading of the angle gauge. There are too many subjective human factors, which directly affect the processing quality of subsequent processes. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an automatic assembly line for a swing cylinder and its assembly method, which effectively solves the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: an automatic assembly line for swing cylinders, comprising: a workbench and a frame disposed on the workbench;

[0005] A tray assembly, slidably mounted on the worktable, includes a base plate and a flipping assembly mounted on the base plate for placing workpieces;

[0006] A stop assembly, disposed on the worktable, is used to limit the sliding tray assembly;

[0007] A lifting assembly is disposed below the base plate and is used to lift and position the base plate after it has slid into place.

[0008] A flipping drive assembly is disposed on the worktable and docked with the flipping assembly. It is used to drive the workpiece on the flipping assembly to flip around a first rotating axis, and the axis of the first rotating axis is parallel to the sliding direction of the tray assembly.

[0009] The pressing assembly, located above the tray assembly and mounted on the frame, includes a sliding plate, a tightening assembly and an engraving assembly mounted on the sliding plate. The tightening assembly is used to tighten the upper end cap of the workpiece and to center the output screw on the workpiece. The engraving assembly is used to engrave lines on the end face of the output screw after centering.

[0010] A first drive assembly, disposed above the frame, is used to drive the pressing assembly to translate along the axial direction of the first rotating shaft, thereby switching the positions of the tightening assembly and the engraving assembly.

[0011] Furthermore, the flipping assembly includes a first side plate and a second side plate sequentially disposed on the base plate along the sliding direction. A first flipping seat and a second flipping seat are provided on the opposite surfaces of the first side plate and the second side plate. The first flipping seat is rotatably disposed on the first side plate via the first rotating shaft, and the second flipping seat is rotatably disposed on the second side plate via the first rotating shaft.

[0012] Furthermore, a transmission component is provided on the side of the first side plate opposite to the first flipping seat. The transmission component is connected to the flipping drive assembly so that the flipping assembly drives the workpiece to rotate.

[0013] A sliding assembly is provided between the second side plate and the bottom plate to allow the second side plate to slide toward or away from the first side plate;

[0014] A positioning limiting component is provided on the side of the second side plate away from the second flip seat. The positioning limiting component includes a fixing block, a fixing frame disposed on one side of the fixing block, and a fixing shaft disposed vertically between the fixing block and the fixing frame. The lower end of the fixing shaft passes through the fixing block and extends into the positioning hole of the base plate, and the upper end of the fixing shaft is provided with a handle.

[0015] Furthermore, the stop assembly includes a mounting bracket, a blocking cylinder disposed on the mounting bracket, and a blocking block disposed at the end of the drive rod of the blocking cylinder;

[0016] The blocking block includes a hinge seat and a swing fork. The hinge seat is coaxially disposed at the drive end of the blocking cylinder. The middle position of the swing fork is hinged to the hinge seat. Two guide wheels are provided at one end near the base plate. The drive rod of the blocking cylinder passes through the hinge seat and is connected to the end of the swing fork away from the base plate.

[0017] Furthermore, the lifting assembly includes a mounting plate, a top plate, at least two lifting cylinders, and at least two guide shaft assemblies;

[0018] The mounting plate is fixed on the workbench, and at least two of the lifting cylinders and at least two of the guide shaft groups are arranged between the mounting plate and the top plate for driving the top plate to move in the vertical direction;

[0019] The bottom plate and the top plate are provided with a pin seat and a positioning head that are matched and positioned.

[0020] Furthermore, the flipping drive assembly includes a slide, a positioning bracket, a connecting shaft, and a servo motor;

[0021] The slide is mounted on the worktable, and the positioning bracket is fixedly mounted on the slide and moves toward the flipping assembly along with the slide;

[0022] The servo motor is mounted on the top of the positioning bracket, and the connecting shaft is connected to the drive shaft of the servo motor via a coupling.

[0023] Furthermore, the tightening assembly includes a first sliding plate, a second sliding plate, a tightening shaft, a tightening bit, and a first drive cylinder;

[0024] The first slide plate is slidably mounted on the translation plate in a vertical direction, the second slide plate is slidably mounted on the first slide plate in a vertical direction, the tightening shaft is fixed on the first slide plate, the tightening bit is fixed on the second slide plate through a bearing seat, and the first drive cylinder is fixed on the translation plate.

[0025] A positioning nut is provided on the first slide plate below the second slide plate. The positioning nut abuts against the bottom of the second slide plate to achieve the connection between the tightening bit and the tightening shaft.

[0026] The second slide plate is equipped with an encoder assembly, which includes a mounting bracket fixed on the second slide plate and an angle encoder mounted on the mounting bracket. The drive shaft of the angle encoder is equipped with a driven pulley, and the end of the tightening bit located at the mating point is equipped with a driving pulley. The driven pulley rotates synchronously with the driving pulley through a synchronous belt.

[0027] Furthermore, a floating connector is provided at the end of the tightening bit away from the tightening shaft;

[0028] The bottom surface of the floating connector is provided with at least two first positioning pins at the outer ring and at least two second positioning pins at the inner ring. The first positioning pins and the second positioning pins are evenly distributed and staggered along the circumferential direction.

[0029] The outer cylindrical surface of the tightening bit is provided with multiple guide brackets corresponding to the positions of the first positioning pin and the second positioning pin. At least two of the first positioning pins pass through one end of the guide bracket and are fixedly connected to the first connecting ring. At least two of the second positioning pins pass through one end of the guide bracket and are fixedly connected to the second connecting ring.

[0030] Furthermore, a boss is provided on the first positioning pin and the second positioning pin, and a spring is provided between the boss and the guide bracket.

[0031] Furthermore, the engraving assembly includes a third sliding plate, a fourth sliding plate, an engraving punch, a buffer, a high-speed cylinder, and a second drive cylinder;

[0032] The third sliding plate is slidably disposed on the translation plate in a vertical direction, and the fourth sliding plate is slidably disposed on the third sliding plate in a vertical direction;

[0033] The engraving punch is located in the middle of the fourth slide plate, and the buffer is provided on both sides of the engraving punch. One end of the buffer is fixed on the fourth slide plate, and the other end is fixed on the third slide plate.

[0034] The high-speed cylinder is mounted on the third slide plate and located directly above the engraving punch. The second drive cylinder is fixed on the translation plate and is used to drive the third slide plate to move in the vertical direction.

[0035] The engraving punch includes a force-bearing rod and two force-applying rods symmetrically arranged on both sides of the force-bearing rod. The ends of the two force-applying rods near the force-bearing rod are connected by a crossbar and connected to the end of the force-bearing rod. The ends of the two force-applying rods away from the force-bearing rod are provided with engraving blades for engraving lines on the end face.

[0036] Furthermore, a lifting shaft assembly is provided below the worktable, the lifting shaft assembly including a lifting drive, a cantilever, a support shaft and a locking assembly;

[0037] The cantilever is disposed below the worktable, the support shaft is disposed at the end of the cantilever, and the lifting drive is disposed on the table surface of the worktable, for driving the cantilever to move upward in the vertical direction so that the support shaft passes through the worktable and the base plate in sequence to support the workpiece on the flipping assembly;

[0038] The locking component is located below the tray assembly and is used to axially limit the support shaft.

[0039] The present invention also provides an assembly method for an automatic assembly line of a swing cylinder, comprising the following steps:

[0040] Start the conveyor rails, and the pallet assembly slides on the conveyor rails;

[0041] When the pallet assembly slides to the required processing step, the stop assembly limits the sliding pallet assembly. At this time, the lifting assembly moves upward to lift and position the base plate.

[0042] After the pallet is positioned, the flip drive assembly docks with the flip assembly and drives the flip assembly to rotate 90° around the first axis. The tightening assembly tightens the upper cover of the workpiece. The flip assembly is then driven to rotate 180°. The tightening assembly docks with the output screw at the other end and centers the machined end face of the output screw.

[0043] Once the output screw has completed centering, the tightening assembly disengages from the output screw. The first drive assembly drives the translation plate to move along the axis of the first rotating shaft to switch the positions of the tightening assembly and the marking assembly. At this time, the marking assembly is switched to be directly above the workpiece, and the marking assembly marks the machining end face of the output screw.

[0044] The beneficial effects of this invention are as follows: By setting up a pallet assembly, a lifting assembly, and a flipping drive, this invention forms an automatic assembly line that replaces manual hammering, ensuring stable force and uniform output force, guaranteeing the consistency of assembly parameters, and improving product quality and precision. The pallet assembly enables automatic feeding, while the lifting assembly and flipping drive can meet the multi-faceted processing requirements of the workpiece. Furthermore, the tightening assembly and engraving assembly effectively control torque and rotation angle, achieving precise processing and centering of the cylinder body, avoiding subjective human factors, and thus improving the processing quality of subsequent processes. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the automatic assembly line for the swing cylinder in an embodiment of the present invention;

[0047] Figure 2 This is a schematic diagram of the internal structure of the automatic assembly line for the swing cylinder in an embodiment of the present invention;

[0048] Figure 3 This is a first-view structural diagram of the tray assembly and the flipping drive assembly in an embodiment of the present invention;

[0049] Figure 4 This is a second-view structural diagram of the tray assembly and the flipping drive assembly in an embodiment of the present invention;

[0050] Figure 5 This is a schematic diagram of the limiting component in an embodiment of the present invention;

[0051] Figure 6 for Figure 3 Enlarged view of a portion at point A;

[0052] Figure 7 This is a schematic diagram of the lifting assembly in an embodiment of the present invention;

[0053] Figure 8This is a schematic diagram of the structure of the flip drive component in an embodiment of the present invention;

[0054] Figure 9 This is a front view of the pressing component in an embodiment of the present invention;

[0055] Figure 10 This is an isometric view of the pressing component in an embodiment of the present invention;

[0056] Figure 11 for Figure 10 A magnified view of section B;

[0057] Figure 12 This is a schematic diagram showing the positions of the lifting shaft assembly and the tray assembly in an embodiment of the present invention;

[0058] Figure 13 This is a schematic diagram of the lifting shaft assembly in an embodiment of the present invention.

[0059] Reference numerals: 1. Workbench; 2. Frame; 3. Pallet assembly; 31. Base plate; 32. Tilting assembly; 32a. First rotating shaft; 321. First side plate; 322. Second side plate; 323. First tilting seat; 324. Second tilting seat; 325. Transmission component; 33. Sliding assembly; 34. Limiting assembly; 341. Fixing block; 342. Fixing frame; 343. Fixing shaft; 4. Stop block assembly; 41. Mounting frame; 42. Blocking cylinder; 43. Blocking block; 431. Hinge seat; 432. Swing fork; 433. Guide wheel; 5. Lifting assembly; 51. Mounting plate; 52. Top plate; 52a. Pin seat; 52b. Positioning head; 53. Lifting cylinder; 54. Guide shaft assembly; 6. Tilting drive assembly; 61. Slide; 62. Positioning bracket; 63. Connecting shaft; 64. 7. Servo motor; 71. Pressing assembly; 72. Translation plate; 73. Tightening assembly; 74. First slide plate; 75. Second slide plate; 76. Tightening shaft; 77. Tightening bit; 78. First positioning pin; 79. Second positioning pin; 70. Guide bracket; 71. First drive cylinder; 72. Positioning nut; 72. Angle encoder; 72. Engraving assembly; 73. Third slide plate; 73. Fourth slide plate; 73. Engraving punch; 73. Force rod; 73. Force application rod; 73. Crossbar; 73. Engraving blade; 73. Buffer; 73. High-speed cylinder; 73. Second drive cylinder; 8. First drive assembly; 90. Lifting shaft assembly; 91. Lifting drive component; 92. Cantilever; 93. Support shaft; 94. Locking assembly. Detailed Implementation

[0060] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0061] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0063] like Figures 1 to 13 The automatic assembly line for the swing cylinder shown includes: a worktable 1, a frame 2, a pallet assembly 3, a stop assembly 4, a lifting assembly 5, a tilting drive assembly 6, a pressing assembly 7, and a first drive assembly 8. The frame 2 is mounted on the worktable 1. The pallet assembly 3 is slidably mounted on the worktable 1. The pallet assembly 3 includes a base plate 31 and a tilting assembly 32 mounted on the base plate 31 for placing workpieces. The stop assembly 4 is mounted on the worktable 1 to limit the sliding of the pallet assembly 3. The lifting assembly 5 is located below the base plate 31 to lift and position the base plate 31 after it has slid into place. The tilting drive assembly 6 is mounted on the worktable 1 and docks with the tilting assembly 32 to drive the tilting. The workpiece on component 32 rotates around the first rotating shaft 32a, and the axis of the first rotating shaft 32a is parallel to the sliding direction of the pallet assembly 3. The pressing component 7 is located above the pallet assembly 3 and is set on the frame 2. The pressing component 7 includes a translation plate 71, and a tightening component 72 and an engraving component 73 set on the translation plate 71. The tightening component 72 is used to tighten the upper end cover of the workpiece and to center the output screw on the workpiece. The engraving component 73 is used to engrave lines on the end face of the output screw after centering. The first drive component 8 is set above the frame 2 and is used to drive the pressing component 7 to translate along the axial direction of the first rotating shaft 32a to realize the switching of the position of the tightening component 72 and the engraving component 73.

[0064] In this invention, sealing plates are provided on all four sides of the workbench 1 and the frame 2, and clearance openings are provided on the two sealing plates corresponding to the conveyor rail to allow the pallet assembly 3 to slide to the next work station. When the pallet assembly 3 slides on the conveyor rail on the workbench 1 and abuts against the stop block assembly 4, the lifting assembly 5 rises vertically to lift and position the base plate 31. At this time, the flipping drive assembly 6 connects with the drive shaft of the flipping assembly 32, driving the workpiece to rotate 90°. Then, the tightening assembly 72 moves downward and connects with the end cover. At this time, the tightening assembly 72 drives the end cover to rotate, realizing the tightening of the end cover. Then, the tightening assembly 72 separates from the end cover, and the flipping drive assembly 6 continues to drive the flipping assembly 32 to rotate. The tightening assembly 72 descends again and connects with the output screw at the other end. Since the cylinder housing the output screw has a helical tooth structure, the output screw has two extreme positions in the clockwise and counterclockwise directions. By rotating the output screw to the extreme positions in both directions, it is calculated that the end face of the output screw is located in the middle position between the two extreme positions. At this time, the tightening assembly 72 drives the output screw to the middle position, realizing the centering step. Finally, the tightening assembly 72 separates from the output screw, and the first drive assembly 8 drives the translation plate 71 to slide in the horizontal direction, moving the engraving assembly 73 directly above the workpiece. The engraving assembly 73 engraves lines on the end face of the output screw. This invention, through the arrangement of pallet assembly 3, lifting assembly 5, and tilting drive, forms an automated assembly line that replaces manual hammering, ensuring stable force and uniform output force, guaranteeing the consistency of assembly parameters, and improving product quality and precision. The pallet assembly 3 enables automatic feeding, while the lifting assembly 5 and tilting drive 6 can meet the multi-faceted processing requirements of the workpiece. Furthermore, the tightening assembly 72 and engraving assembly 73 effectively control torque and rotation angle, achieving precise processing and centering of the cylinder body, avoiding subjective human factors, and thus improving the processing quality of subsequent processes.

[0065] Combination Figure 3 and Figure 4In this invention, the flipping assembly 32 includes a first side plate 321 and a second side plate 322 sequentially arranged on a base plate 31 along the sliding direction. A first flipping seat 323 and a second flipping seat 324 are provided on opposite surfaces of the first side plate 321 and the second side plate 322. The first flipping seat 323 is rotatably mounted on the first side plate 321 via a first rotating shaft 32a, and the second flipping seat 324 is rotatably mounted on the second side plate 322 via the first rotating shaft 32a. A transmission member 325 is provided on the side of the first side plate 321 facing away from the first flipping seat 323. The transmission member 325 is connected to the flipping drive assembly 6 to cause the flipping assembly 32 to drive the workpiece to rotate. The transmission member 325 and the flipping... The drive assembly 6 docks, effectively transmitting power and allowing the flipping assembly 32 to rotate to different positions and angles during assembly, facilitating multi-faceted processing. Furthermore, to accommodate the processing of cylinders of different sizes, a sliding assembly 33 is provided between the second side plate 322 and the base plate 31, allowing the second side plate 322 to slide towards or away from the first side plate 321. This facilitates adjustment of the installation distance between the first side plate 321 and the second side plate 322. A positioning limiting assembly 34 is provided on the side of the second side plate 322 facing away from the second flipping seat 324, preventing wobbling or displacement during workpiece flipping. Specifically, for example... Figure 5 As shown, the limiting component 34 includes a fixing block 341, a fixing frame 342 disposed on one side of the fixing block 341, and a fixing shaft 343 disposed vertically between the fixing block 341 and the fixing frame 342. The lower end of the fixing shaft 343 passes through the fixing block 341 and extends into the positioning hole of the base plate 31, and the upper end of the fixing shaft 343 is provided with a handle. In specific implementation, when the second side plate 322 is slidable, the handle needs to be manually pulled upward to disengage the fixing shaft 343 from the positioning hole, thereby unlocking the second side plate 322. After moving to the desired position, the fixing shaft 343 is inserted into the corresponding positioning hole on the base plate 31 to achieve positioning of the second side plate 322. Preferably, the positioning shaft is provided with a return spring, so that after moving to the position, when the handle is released, the reverse force of the compressed return spring can automatically insert the fixing shaft 343 into the positioning hole.

[0066] To ensure the positioning accuracy of the lifting assembly 5 on the moving pallet assembly 3, such as... Figure 3 and Figure 6As shown, a stop assembly 4 is provided in the forward section of the pallet assembly 3. The stop assembly 4 enables the moving pallet assembly 3 to stop at a precisely set position, so as to facilitate the secondary positioning of the lifting assembly 5. Specifically, the stop assembly 4 includes a mounting frame 41, a blocking cylinder 42 disposed on the mounting frame 41, and a blocking block 43 disposed at the end of the drive rod of the blocking cylinder 42. The blocking block 43 includes a hinge seat 431 and a swing fork 432. The hinge seat 431 is coaxially disposed at the drive end of the blocking cylinder 42. The middle position of the swing fork 432 is hinged to the hinge seat 431. Two guide wheels 433 are provided at one end near the bottom plate 31. The drive rod of the blocking cylinder 42 passes through the hinge seat 431 and is connected to the end of the swing fork 432 away from the bottom plate 31.

[0067] When the pallet assembly 3 slides into this process, the drive rod of the blocking cylinder 42 retracts to drive the swing fork 432 to rotate. The two guide wheels 433 on the swing fork 432 block the base plate 31 so that the base plate 31 stops at the processing position.

[0068] After this process is completed, the lifting assembly 5 separates from the base plate 31, and the blocking cylinder 42 moves upward so that the two guide wheels 433 are lower than the bottom surface of the base plate 31. At this time, the base plate 31 and the two guide wheels 433 roll into contact so that the pallet assembly 3 continues to slide on the conveyor rail to the next process.

[0069] In a preferred embodiment of the present invention, such as Figure 7 As shown, the lifting assembly 5 includes a mounting plate 51, a top plate 52, at least two lifting cylinders 53, and at least two guide shaft assemblies 54; the mounting plate 51 is fixed on the worktable 1, and the at least two lifting cylinders 53 and at least two guide shaft assemblies 54 are arranged between the mounting plate 51 and the top plate 52 for driving the top plate 52 to move in the vertical direction; the bottom plate 31 and the top plate 52 are provided with a pin seat 52a and a positioning head 52b that are matched and positioned on their opposite surfaces.

[0070] Specifically, two lifting cylinders 53 are provided and are arranged on both sides along the moving direction of the pallet assembly 3, while four guide shaft groups 54 are provided and are correspondingly arranged at the four corners of the top plate 52. Driven by the lifting cylinders 53, the top plate 52 can move precisely in the vertical direction. This vertical movement capability enables the top plate 52 to adjust and position the workpiece at a certain height, improving the accuracy and efficiency of the operation. During the lifting process, the guide shaft groups 54 play a guiding and supporting role, reducing the shaking and offset of the top plate 52. Furthermore, the structure of the pin seat 52a and the positioning head 52b can achieve precise positioning between the top plate 52 and the bottom plate 31, ensuring accurate positioning and improving the positioning accuracy of the bottom plate 31.

[0071] like Figure 8As shown, the flip drive assembly 6 includes a slide 61, a positioning bracket 62, a connecting shaft 63, and a servo motor 64. The slide 61 is mounted on the worktable 1, and the positioning bracket 62 is fixedly mounted on the slide 61 and moves toward the flip assembly 32 along with the slide 61. The servo motor 64 is mounted on the top of the positioning bracket 62, and the connecting shaft 63 is connected to the drive shaft of the servo motor 64 through a coupling to drive the connecting shaft 63 to rotate.

[0072] Specifically, the slide 61 provides stable support and guidance, allowing the flip drive assembly 6 to move smoothly on the worktable 1. The positioning bracket 62 is fixedly mounted on the slide 61, and it docks with the flip assembly 32 as it moves toward the flip assembly 32 following the slide 61. The rotation of the connecting shaft 63 drives the movement of the flip assembly 32, achieving fast and precise flipping operation.

[0073] In this invention, the tightening assembly 72 enables the assembly of the end cap and the centering of the output screw, such as... Figure 9-10 As shown, preferably, the tightening assembly 72 includes a first slide plate 721, a second slide plate 722, a tightening shaft 723, a tightening bit 724, and a first drive cylinder 725; the first slide plate 721 is slidably disposed on the translation plate 71 in the vertical direction, the second slide plate 722 is slidably disposed on the first slide plate 721 in the vertical direction, the tightening shaft 723 is fixed on the first slide plate 721, the tightening bit 724 is fixed on the second slide plate 722 through a bearing seat, and the first drive cylinder 725 is fixed on the translation plate 71; a positioning nut 726 is provided on the first slide plate 721 below the second slide plate 722, the positioning nut 726 abuts against the lower part of the second slide plate 722 to realize the docking of the tightening bit 724 and the tightening shaft 723;

[0074] An encoder assembly is provided on the second slide plate 722. The encoder assembly includes a mounting bracket fixed on the second slide plate 722 and an angle encoder 727 set on the mounting bracket. A driven pulley is provided on the drive shaft of the angle encoder 727, and a driving pulley is provided at the mating end of the tightening bit 724. The driven pulley rotates synchronously with the driving pulley through a synchronous belt.

[0075] Within the tightening assembly 72, a first sliding plate 721 and a second sliding plate 722 are arranged to form a layered sliding mechanism, enabling relative sliding between multiple sliding components and providing flexible adjustment and control space. A positioning nut 726 is provided on the first sliding plate 721 below the second sliding plate 722 to abut against the second sliding plate 722, ensuring precise alignment between the tightening bit 724 and the tightening shaft 723, avoiding deviations and instabilities. Furthermore, belt drive enables the angle sensor and the tightening shaft 723 to move synchronously, providing precise angle control and position feedback. In this invention, the tightening shaft 723 serves as the power source, and the angle encoder 727 provides consistent and unbiased product angles, ensuring product quality upon leaving the factory.

[0076] As a preferred embodiment of the above, such as Figure 11 As shown, a floating connector is provided at the end of the tightening bit 724 away from the tightening shaft 723; at least two first positioning pins 724a are provided on the bottom surface of the floating connector at the outer ring, and at least two second positioning pins 724b are provided at the inner ring, with the first positioning pins 724a and the second positioning pins 724b evenly distributed and staggered along the circumferential direction; multiple guide brackets 724c are provided on the outer cylindrical surface of the tightening bit 724 at positions corresponding to the first positioning pins 724a and the second positioning pins 724b, with at least two first positioning pins 724a passing through one end of the corresponding guide bracket 724c and fixedly connected to the first connecting ring, and at least two second positioning pins 724b passing through one end of the corresponding guide bracket 724c and fixedly connected to the second connecting ring; and bosses are provided on the first positioning pins 724a and the second positioning pins 724b, with springs provided between the bosses and the guide brackets 724c.

[0077] When the floating connector tightens the end cover, the two second locating pins 724b abut against the end face of the end cover. As the two first locating pins 724a gradually insert into the corresponding limiting holes, the second locating pins 724b drive the second connecting ring to move upward. When the first locating pins 724a are fully inserted into the limiting holes, the tightening shaft 723 begins to apply torque, tightening the end cover to the specified torque. At this time, the torque-related data involved in the tightening is transmitted and stored to the industrial control computer, providing a guarantee for subsequent product traceability. When the floating connector aligns with the end face of the output screw, the two second locating pins 724b... 24b is embedded in the positioning hole on the end face of the output screw. At this time, the two first positioning pins 724a drive the first connecting ring to move upward, realizing the docking of the floating connector and the output screw. The tightening shaft 723 drives the output screw to rotate synchronously, that is, rotate clockwise until it can't rotate anymore. The encoder records the current angle. Rotate counterclockwise until it can't rotate anymore. The encoder records the current angle. The PCL analyzes the data of the two recorded angles, calculates the intermediate angle, and then controls the tightening shaft 723 to rotate the output screw to the calculated intermediate position, realizing the centering step.

[0078] By using the first positioning pin 724a and the second positioning pin 724b, the present invention can meet the processing requirements of different processes on the workpiece. By setting multiple guide brackets 724c, the movement trajectory of the tightening bit 724 is effectively guided, avoiding unnecessary swaying and deviation, and improving the accuracy of operation. The protrusion on the positioning pin and the spring between the guide brackets 724c can play a role in buffering and shock absorption, improving the stability of tightening bit 724 and processing efficiency.

[0079] like Figure 9 and Figure 10 As shown, the engraving assembly 73 includes a third sliding plate 731, a fourth sliding plate 732, an engraving punch 733, a buffer 734, a high-speed cylinder 735, and a second drive cylinder 736. The third sliding plate 731 is slidably mounted on the translation plate 71 in the vertical direction, and the fourth sliding plate 732 is slidably mounted on the third sliding plate 731 in the vertical direction. The engraving punch 733 is located in the middle of the fourth sliding plate 732, and buffers 734 are provided on both sides of the engraving punch 733. One end of the buffer 734 is fixed to the fourth sliding plate 732, and the other end is fixed to the third sliding plate 731. The high-speed cylinder 735 is mounted on the third sliding plate 731 and located directly above the engraving punch 733. The second drive cylinder 736 is fixed to the translation plate 71 and is used to drive the third sliding plate 731 to move in the vertical direction. Figure 11 As shown, the engraving punch 733 includes a force-receiving rod 733a and two force-applying rods 733b symmetrically arranged on both sides of the force-receiving rod 733a. The ends of the two force-applying rods 733b near the force-receiving rod 733a are connected to the end of the force-receiving rod 733a via a crossbar 733c. The ends of the two force-applying rods 733b away from the force-receiving rod 733a are provided with engraving blades 733d for engraving lines on the end face.

[0080] By setting the third slide plate 731, the fourth slide plate 732, and the engraving punch 733, the engraving punch 733 can be precisely positioned in the vertical direction. This positioning method ensures accurate contact between the engraving blade 733d and the workpiece, thereby improving the engraving accuracy and clarity. Buffers 734 are set on both sides of the engraving punch 733, which buffer and stabilize it during the downward impact of the high-speed cylinder 735, helping to reduce the impact of vibration or impact, protecting the engraving punch 733 and the workpiece, and improving the engraving quality. In addition, the engraving punch 733 is equipped with two force-applying rods 733b, and the engraving blade 733d is mounted on the force-applying rods 733b. The crossbar 733c connected in the middle of the force-applying rods 733b is hinged to the force-receiving rod 733a. During the downward movement of the engraving punch 733 by the second drive cylinder 736, automatic leveling on the processing surface is achieved, enabling the engraving punch 733 to maintain good engraving quality during the engraving process.

[0081] In this invention, after the tightening shaft 723 centers the output screw, it disengages from the output screw. The marking assembly 73 moves horizontally above the output screw, and the marking punch 733 moves downward to the end face of the output screw. At this time, the high-speed cylinder 735 applies downward pressure to the marking assembly 73 so that the marking blade 733d leaves a marking line on the end face of the output screw. However, because the bottom of the flipping assembly 32 is hollow, the workpiece is easily displaced when high-speed impact is applied, resulting in marking line misalignment, which affects the machining accuracy of subsequent holes. Therefore, if... Figure 12-13 As shown, a lifting shaft assembly 9 is provided below the worktable 1. The lifting shaft assembly 9 includes a lifting drive 91, a cantilever 92, a support shaft 93, and a locking assembly 94. The cantilever 92 is located below the worktable 1, and the support shaft 93 is located at the end of the cantilever 92. The lifting drive 91 is located on the table surface of the worktable 1 and is used to drive the cantilever 92 to move vertically upward so that the support shaft 93 passes through the worktable 1 and the base plate 31 in sequence to support the workpiece on the flipping assembly 32. The locking assembly 94 is located below the tray assembly 3 and is used to axially limit the support shaft 93.

[0082] The present invention also provides an assembly method for an automatic assembly line of a swing cylinder, comprising the following steps:

[0083] The conveyor rail is activated, and pallet assembly 3 slides on the conveyor rail; this automated production method can improve production efficiency, reduce production costs, and reduce manual operation.

[0084] When the pallet assembly 3 slides to the required processing step, the stop assembly 4 limits the sliding pallet assembly 3. At this time, the lifting assembly 5 moves upward to lift and position the base plate 31; this enables precise positioning of the workpiece. This helps ensure processing quality and consistency.

[0085] After the pallet is positioned, the flip drive assembly 6 docks with the flip assembly 32 and drives the flip assembly 32 to rotate 90° around the first rotating shaft 32a. The tightening assembly 72 tightens the upper end cover of the workpiece. The flip assembly 32 is then driven to rotate 180°. The tightening assembly 72 docks with the output screw at the other end and centers the machining end face of the output screw. By docking the flip drive assembly 6 with the flip assembly 32 and driving the flip assembly 32 to rotate 90° and 180° around the first rotating shaft 32a, the assembly of multiple functional components such as tightening and engraving can be realized, thereby meeting the processing requirements of different workpieces.

[0086] Once the output screw has been centered, the tightening assembly 72 disengages from the output screw. The first drive assembly 8 drives the translation plate 71 to move along the axis of the first rotating shaft 32a to switch the positions of the tightening assembly 72 and the engraving assembly 73. At this time, the engraving assembly 73 is switched to be directly above the workpiece, and the engraving assembly 73 engraves lines on the processing end face of the output screw. This efficient engraving method can effectively improve production efficiency and engraving quality.

[0087] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A swing cylinder automatic assembly line characterized by comprising: The utility model relates to a workbench and a rack arranged on the workbench. A tray assembly is slidingly arranged on the workbench and includes a bottom plate and a turnover assembly arranged on the bottom plate for placing workpieces. A stop block assembly is arranged on the workbench for limiting the sliding tray assembly. A jacking assembly is arranged below the bottom plate for jacking and positioning the sliding bottom plate. A turnover driving assembly is arranged on the workbench and is in abutment with the turnover assembly for driving the workpieces on the turnover assembly to turn around a first rotation shaft, and the axis of the first rotation shaft is parallel to the sliding direction of the tray assembly. A pressing assembly is arranged above the tray assembly and on the rack and includes a translation plate, a tightening assembly and an engraving assembly arranged on the translation plate, the tightening assembly is used for tightening the upper end cover of the workpiece and centering the output screw rod of the workpiece, and the engraving assembly is used for engraving lines on the end face of the centered output screw rod. A first driving assembly is arranged above the rack for driving the pressing assembly to translate along the axis direction of the first rotation shaft to switch the positions of the tightening assembly and the engraving assembly. The engraving assembly includes a third sliding plate, a fourth sliding plate, an engraving punch, a buffer, a high-speed cylinder and a second driving cylinder. The third sliding plate is slidingly arranged on the translation plate in the vertical direction, and the fourth sliding plate is slidingly arranged on the third sliding plate in the vertical direction. The engraving punch is arranged at the middle position of the fourth sliding plate, and the buffers are arranged on both sides of the engraving punch, one end of each buffer is fixed on the fourth sliding plate, and the other end is fixed on the third sliding plate. The high-speed cylinder is arranged on the third sliding plate and directly above the engraving punch, and the second driving cylinder is fixed on the translation plate for driving the third sliding plate to move in the vertical direction. The engraving punch includes a force rod and two force rods symmetrically arranged on both sides of the force rod, one end of each force rod close to the force rod is connected by a cross bar and connected to the end of the force rod, and the other end of each force rod away from the force rod is provided with a cutting edge for engraving lines on the end face. The turnover assembly includes a first side plate and a second side plate arranged in sequence on the bottom plate in the sliding direction, first and second turnover seats are arranged on the opposite surfaces of the first and second side plates, the first turnover seat is rotatably arranged on the first side plate by the first rotation shaft, and the second turnover seat is rotatably arranged on the second side plate by the first rotation shaft.

2. The swing cylinder automatic assembly line according to claim 1, wherein A transmission member is arranged on the side of the first side plate away from the first turnover seat, the transmission member is in abutment with the turnover driving assembly to make the turnover assembly drive the workpieces to rotate. A sliding assembly is arranged between the second side plate and the bottom plate to make the second side plate slide towards or away from the first side plate. ​ A limiting assembly for positioning is arranged on the side of the second side plate away from the second turnover seat, and the limiting assembly comprises a fixed block, a fixed frame arranged on one side of the fixed block, and a fixed shaft arranged between the fixed block and the fixed frame in a vertical direction, the lower end of the fixed shaft penetrating into the positioning hole of the bottom plate through the fixed block, and the upper end of the fixed shaft being provided with a handle.

3. The swing cylinder automatic assembly line according to claim 1, wherein The stopper assembly comprises a mounting frame, a blocking cylinder arranged on the mounting frame, and a blocking block arranged at the end of the driving rod of the blocking cylinder; The blocking block comprises a hinged seat arranged at the driving end of the blocking cylinder, and a swing fork hinged at the middle position of the swing fork to the hinged seat, and two guide wheels arranged at one end close to the bottom plate, and the driving rod of the blocking cylinder penetrating through the hinged seat and being connected to one end of the swing fork away from the bottom plate.

4. The swing cylinder automatic assembly line according to claim 1, wherein The jacking assembly comprises a mounting plate, a top plate, at least two jacking cylinders and at least two guide shaft groups; The mounting plate is fixed on the workbench, and at least two jacking cylinders and at least two guide shaft groups are arranged between the mounting plate and the top plate for driving the top plate to move in a vertical direction; The bottom plate and the top plate are provided with a matched positioning pin seat and a positioning head on the opposite surfaces.

5. The swing cylinder automatic assembly line according to claim 1, wherein The turnover driving assembly comprises a sliding seat, a positioning support, a connecting shaft and a servo motor; The sliding seat is arranged on the workbench, the positioning support is fixedly arranged on the sliding seat and moves towards the turnover assembly along with the sliding seat; The servo motor is arranged on the top of the positioning support, and the connecting shaft is connected to the driving shaft of the servo motor through a shaft coupling.

6. The swing cylinder automatic assembly line according to claim 1, wherein The tightening assembly comprises a first sliding plate, a second sliding plate, a tightening shaft, a tightening head and a first driving cylinder; The first sliding plate is arranged on the translation plate in a vertical direction, the second sliding plate is arranged on the first sliding plate in a vertical direction, the tightening shaft is fixed on the first sliding plate, the tightening head is fixed on the second sliding plate through a bearing seat, and the first driving cylinder is fixed on the translation plate; A positioning nut is arranged on the first sliding plate below the second sliding plate, and the positioning nut abuts below the second sliding plate to realize the butt joint of the tightening head and the tightening shaft; An encoder assembly is arranged on the second sliding plate, the encoder assembly comprises a mounting support fixed on the second sliding plate, and an angle encoder arranged on the mounting support, a driven pulley is arranged on the driving shaft of the angle encoder, a driving pulley is arranged on one end of the tightening head in butt joint, and the driven pulley and the driving pulley are synchronously rotated through a synchronous belt.

7. The swing cylinder automatic assembly line according to claim 6, wherein A floating connector is arranged at one end of the tightening head away from the tightening shaft; The bottom surface of the floating connector is provided with at least two first positioning pins at the outer ring and at least two second positioning pins at the inner ring, and the first positioning pins and the second positioning pins are arranged in a circumferential direction. The outer cylindrical surface of the screwing head is provided with a plurality of guide supports corresponding to the positions of the first positioning pins and the second positioning pins, at least two first positioning pins are fixedly connected to the first connecting ring through one end corresponding to the guide supports, and at least two second positioning pins are fixedly connected to the second connecting ring through one end corresponding to the guide supports; And a boss is arranged on the first positioning pin and the second positioning pin, and a spring is arranged between the boss and the guide support.

8. The swing cylinder automatic assembly line according to claim 1, wherein A jacking shaft assembly is arranged below the workbench, and the jacking shaft assembly comprises a jacking drive, a cantilever, a support shaft and a locking assembly; The cantilever is arranged below the workbench, the support shaft is arranged at the end of the cantilever, and the jacking drive is arranged on the tabletop of the workbench and is used to drive the cantilever to move upward in the vertical direction, so that the support shaft supports the workpiece on the turnover assembly in sequence through the workbench and the bottom plate; The locking assembly is arranged below the tray assembly and is used to axially limit the support shaft.

9. A method of assembling a swing cylinder automatic assembly line as claimed in any one of claims 1 to 8, characterized in that, The method comprises the following steps: Start the conveying line rail, and slide the tray assembly on the conveying line rail; When the tray assembly slides to the required machining process, the stop block assembly limits the sliding tray assembly, at this time the jacking assembly moves upward to jacking position the bottom plate; After the positioning of the tray is completed, the turnover drive assembly is connected with the turnover assembly, and drives the turnover assembly to turn 90° around the first rotating shaft, the screwing assembly screws the end cover of the workpiece, continues to drive the turnover assembly to rotate 180°, the screwing assembly is connected with the output screw rod at the other end, and the machining end surface of the output screw rod is centered; When the centering of the output screw rod is completed, the screwing assembly is disconnected from the output screw rod, the first drive assembly drives the translation plate to move along the axis of the first rotating shaft, so as to switch the positions of the screwing assembly and the marking assembly, at this time the marking assembly is switched to be directly above the workpiece, and the marking assembly marks lines on the machining end surface of the output screw rod.

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