Automatic assembly device and assembly method for ring-shaped workpieces

Abstract

The application relates to the technical field of automobile pressure sensor assembly, in particular to an annular workpiece automatic assembly device and an assembly method, which comprise a stand, a workbench vertically arranged at the top end of the stand and a feeding channel horizontally arranged in the middle of the workbench top, and further comprise a material pushing mechanism, a material distributing mechanism, a flow transfer jig and a material taking and pressing assembly mechanism; the material pushing mechanism is vertically arranged at the back of the workbench top to push out materials in the feeding channel; the material distributing mechanism is vertically arranged at the front end of the workbench to store the pushed-out materials in the feeding channel; the flow transfer jig is arranged at the right side of the workbench and is conveyed by a wire body; and the material taking and pressing assembly mechanism is arranged at the top end of the workbench to take away the stored materials on the material distributing mechanism and assemble the materials into products on the flow transfer jig; the annular workpiece automatic assembly device and the assembly method provided by the application have the advantages of simple structure design, high assembly efficiency, stable assembly quality and compatibility with multiple products.

Description

Technical Field

[0001] This invention relates to the field of automotive pressure sensor assembly technology, and in particular to an automatic assembly device and method for annular workpieces. Background Technology

[0002] In the assembly of automotive pressure sensors, O-rings are primarily used for end-face sealing, meaning the O-ring is fitted into the inner hole of the product. Traditional O-ring assembly methods mainly employ O-ring clamps and expansion shafts. These two methods are similar in principle: the inner diameter of the O-ring is increased using clamps or expansion shafts, and then a pusher mechanism removes the O-ring and fits it onto the product. These two methods are suitable for radial sealing but are clearly unsuitable for end-face sealing.

[0003] Currently, O-ring assembly in automotive pressure sensors is typically done manually, which is time-consuming, labor-intensive, and makes it difficult to guarantee consistent assembly quality. While specialized assembly equipment exists for automated O-ring assembly, its complex design results in low efficiency and incompatibility with multiple products, such as those with stepped inner bores (e.g.,...). Figure 1 As shown), some products have no steps in the inner hole (such as...). Figure 2 As shown, separate assembly equipment needs to be designed for each type of O-ring. Furthermore, due to the inherent flexibility of O-rings, their roundness consistency is very poor, making automated assembly processes difficult to achieve. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an automatic assembly device and assembly method for ring workpieces with simple structural design, high assembly efficiency, stable assembly quality, and compatibility with multiple products.

[0005] The technical solution adopted by this invention to solve its technical problem is: an automatic assembly device for ring-shaped workpieces, including a column, a worktable longitudinally installed at the top of the column, and a feeding channel transversely installed in the middle of the worktable surface, and further including:

[0006] The feeding mechanism is installed longitudinally at the rear of the workbench to push out materials in the feeding channel;

[0007] The material distribution mechanism is installed vertically at the front end of the workbench to store the material pushed out from the feeding channel;

[0008] The transfer fixture is located on the right side of the workbench and is conveyed by the production line;

[0009] And a material handling and pressing mechanism, installed on the top of the workbench, to take away the materials stored on the material distribution mechanism and assemble them into the products on the transfer fixture.

[0010] Furthermore, the material handling and pressing mechanism includes a bracket, a two-dimensional motion component, and a material handling and pressing component. The bracket is horizontally installed at the rear top of the worktable, the two-dimensional motion component is installed on the bracket, and the material handling and pressing component is vertically installed at the drive end of the two-dimensional motion component.

[0011] Furthermore, the material handling and pressing assembly includes a sleeve, a material handling shaft, a retaining ring, a return spring, a pressing sleeve, a truncated cone, and limiting components. The sleeve is a hollow structure. The material handling shaft is coaxially arranged inside the sleeve and has a clearance fit with the sleeve. The top end of the material handling shaft passes through a first through hole opened at the top end of the sleeve, and its bottom end passes through a second through hole opened at the bottom end of the sleeve. The retaining ring and the return spring are both arranged inside the sleeve and fitted onto the material handling shaft. The outer ring of the retaining ring is supported on an annular ridge formed on the inner wall of the sleeve, and its inner ring is supported on a shoulder formed in the middle of the material handling shaft. The top end of the return spring abuts against the top wall of the sleeve, and its bottom end abuts against the top end of the retaining ring. The pressing sleeve is installed at the bottom end of the sleeve and fitted onto the material handling shaft. The truncated cone is installed at the bottom end of the material handling shaft. Several limiting components are installed on the bottom peripheral wall of the material handling shaft.

[0012] Furthermore, the outer surface of the limiting member includes an arc surface, a straight surface, and an inclined surface connected sequentially from top to bottom, and the inclined surface is seamlessly connected to the peripheral wall of the inverted frustum.

[0013] Furthermore, the two-dimensional motion component includes a horizontal module and a vertical module. The horizontal module is mounted on the top of the support, the vertical module is mounted on the slide plate of the horizontal module, and the material handling and pressing component is mounted on the slide plate of the vertical module.

[0014] Furthermore, the material distribution mechanism includes a frame, a material distribution motor, a rotating shaft, a material distribution disc, a lifting column, a clamping spring, and a first through-beam sensor. The frame is located below the workbench, and its top four corners are connected to the workbench via short shafts. The material distribution motor is vertically mounted at the bottom center of the frame, and its output end is connected to the bottom of the rotating shaft via a coupling. The middle of the rotating shaft is rotatably connected to the top center of the frame, and its top is connected to the bottom center of the material distribution disc. The material distribution disc is located in a third through hole at the front end of the workbench and is clearance-fitted with the third through hole. The lifting column and the clamping spring are both located in a stepped cavity within the material distribution disc. The lifting column is slidably fitted with the stepped cavity. The top of the clamping spring abuts against the bottom of the lifting column, and its bottom abuts against the bottom wall of the stepped cavity. The top of the material distribution disc has a notch communicating with the stepped cavity. The first through-beam sensor is located on the left and right sides of the front end of the workbench. The top of the material distribution disc has an avoidance channel.

[0015] Furthermore, the material misalignment mechanism includes a material misalignment cylinder and a pusher block. The material misalignment cylinder is longitudinally mounted on the workbench surface, and its drive end is connected to the rear end of the pusher block, which is longitudinally positioned on the workbench.

[0016] Furthermore, the transfer fixture includes a base plate, a boss, a placement seat, and a stop pin. The base plate is mounted on the line body, the boss is mounted at the top center of the base plate, and the bottom end of the placement seat is inserted into the fourth through hole opened in the center of the boss and is detachably connected to the boss through the stop pin.

[0017] Furthermore, the feeding channel includes a guide plate, a reference block, and a second through-beam sensor. The guide plate is horizontally arranged on the table surface. There are two guide plates, arranged side by side with a gap. The bottom ends of opposite sides of the guide plates are symmetrically provided with grooves. The reference blocks are spaced apart on the right side of the guide plates. The second through-beam sensor is located at the top of the reference block and the bottom of the worktable. An avoidance through hole is provided in the middle of the worktable.

[0018] An automatic assembly method for a ring-shaped workpiece includes the following steps:

[0019] S1. Feeding: Materials are conveyed in an orderly manner into the feeding channel;

[0020] S2. Material distribution: The material distribution mechanism pushes the material in the feeding channel into the material distribution mechanism for storage;

[0021] S3. Material picking and pressing: The material picking and pressing mechanism takes away the material stored on the material distribution mechanism and assembles it into the product on the transfer fixture.

[0022] The beneficial effects of this invention are:

[0023] (1) The present invention pushes the material in the feeding channel into the material distribution mechanism for storage through the material feeding mechanism, and then takes away the material stored on the material distribution mechanism through the material taking and pressing mechanism, and assembles it into the product on the transfer fixture, thereby realizing the assembly of the material in the inner hole of the product. The whole process is automated, the assembly efficiency is significantly improved, and the stability of the assembly quality is guaranteed.

[0024] (2) By setting up the material loading and pressing component, the present invention can achieve precise assembly of materials regardless of whether there are steps in the inner hole of the product, and has strong compatibility. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram showing that the product's inner hole has steps;

[0027] Figure 2 This is a schematic diagram of the product's inner bore without steps;

[0028] Figure 3 This is a schematic diagram of the structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the feeding channel in this invention;

[0030] Figure 5 This is a schematic diagram of the material handling and pressing mechanism in this invention;

[0031] Figure 6 This is a cross-sectional view of the material handling and pressing assembly in this invention;

[0032] Figure 7 This is a schematic diagram of the material handling shaft in this invention;

[0033] Figure 8 This is a schematic diagram of the material distribution mechanism in this invention;

[0034] Figure 9 This is a cross-sectional view of the material distribution mechanism in this invention;

[0035] Figure 10 This is a schematic diagram of the transfer fixture in this invention;

[0036] Figure 11 This is a cross-sectional view of the transfer fixture in this invention.

[0037] In the diagram: 100, column; 200, worktable; 210, third through hole; 220, clearance through hole; 300, feeding channel; 310, guide plate; 311, groove; 320, reference block; 330, second through-beam sensor; 400, material feeding mechanism; 410, material feeding cylinder; 420, pusher block; 500, material distribution mechanism; 510, frame; 520, material distribution motor; 530, rotating shaft; 540, material distribution plate; 541, stepped cavity; 542, notch; 543, clearance channel; 550, lifting column; 560, clamping spring; 570, first through-beam sensor; 600, transfer fixture; 61 0. Base plate; 620. Boss; 621. Fourth through hole; 630. Placement seat; 640. Stop pin; 700. Material handling and pressing mechanism; 710. Bracket; 720. Two-dimensional motion component; 721. Horizontal module; 722. Vertical module; 730. Material handling and pressing component; 731. Sleeve; 7311. First through hole; 7312. Second through hole; 732. Material handling shaft; 7321. Shoulder; 733. Retaining ring; 734. Return spring; 735. Pressing sleeve; 736. Inverted truncated cone; 737. Limiting component; 7371. Arc surface; 7372. Straight surface; 7373. Inclined surface; 738. Annular ridge. Detailed Implementation

[0038] The present invention will now be further described in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner, and therefore only show the components relevant to the invention.

[0039] Example 1

[0040] like Figure 3 As shown, an automatic assembly device for ring-shaped workpieces includes a column 100, a worktable 200 longitudinally mounted on the top of the column 100, and a feeding channel 300 transversely mounted in the middle of the worktable 200. It also includes a material feeding mechanism 400, a material separating mechanism 500, a transfer fixture 600, and a material picking and pressing mechanism 700. The material feeding mechanism 400 is longitudinally mounted at the rear of the worktable 200 to push out materials from the feeding channel 300. The material separating mechanism 500 is vertically mounted at the front of the worktable 200 to store the materials pushed out from the feeding channel 300. The transfer fixture 600 is located on the right side of the worktable 200 and is conveyed by a production line. The material picking and pressing mechanism 700 is mounted on the top of the worktable 200 to remove the materials stored on the material separating mechanism 500 and assemble them into the product on the transfer fixture 600. The material in the feeding channel 300 is pushed into the material distribution mechanism 500 by the feeding mechanism 400 and then stored in the material distribution mechanism 500 by the material picking and pressing mechanism 700. The material is then picked up from the material distribution mechanism 500 and assembled into the product on the transfer fixture 600, realizing the assembly of the material in the inner hole of the product. The whole process is automated, the assembly efficiency is significantly improved, and the stability of the assembly quality is guaranteed.

[0041] Specifically, such as Figure 3 and Figure 4 As shown, the feeding channel 300 includes a guide plate 310, a reference block 320, and a second through-beam sensor 330. The guide plate 310 is horizontally arranged on the table surface of the workbench 200. There are two guide plates 310, arranged side by side with intervals. The bottom ends of opposite sides of the guide plates 310 are symmetrically provided with grooves 311. The reference blocks 320 are spaced apart on the right side of the guide plates 310. The second through-beam sensor 330 is located at the top of the reference block 320 and the bottom of the workbench 200. A clearance through hole 220 is provided in the middle of the workbench 200. The material enters the feeding channel 300 in an orderly manner through the vibrating plate and the linear vibrating track (not shown in the figure). The material moves laterally along the groove 311 until it comes into contact with the reference block 320. At this time, the material covers the clearance through hole 220, the second through-beam sensor 330 senses the material, and the feeding mechanism 400 pushes the material into the distributing mechanism 500.

[0042] like Figure 3 and Figure 5As shown, the material handling and pressing mechanism 700 includes a support 710, a two-dimensional motion component 720, and a material handling and pressing component 730. The support 710 is horizontally mounted on the rear top of the worktable 200. The two-dimensional motion component 720 is mounted on the support 710, and the material handling and pressing component 730 is vertically mounted on the drive end of the two-dimensional motion component 720. The two-dimensional motion component 720 drives the material handling and pressing component 730 to move horizontally to directly above the material distribution mechanism 500, and then drives the material handling and pressing component 730 to rise and fall to pick up the material. After picking up the material, the material handling and pressing component 730 is driven to move horizontally to directly above the transfer fixture 600, and finally the material handling and pressing component 730 is driven to fall to press up the material. Specifically, the two-dimensional motion component 720 includes a horizontal module 721 and a vertical module 722. The horizontal module 721 is mounted on the top of the bracket 710, and the vertical module 722 is mounted on the slide plate of the horizontal module 721. The material picking and pressing component 730 is mounted on the slide plate of the vertical module 722. There are two sets of material picking and pressing components 730, which are mounted side by side on the slide plate of the vertical module 722 through mounting plates to realize dual-station material picking and pressing, further improving pressing efficiency.

[0043] like Figures 5-7 As shown, the material handling and pressing assembly 730 includes a sleeve 731, a material handling shaft 732, a retaining ring 733, a return spring 734, a pressing sleeve 735, a truncated cone 736, and a limiting member 737. The sleeve 731 has a hollow structure. The material handling shaft 732 is coaxially arranged inside the sleeve 731 and has a clearance fit with the sleeve 731. The top end of the material handling shaft 732 passes through the first through hole 7311 opened at the top end of the sleeve 731, and its bottom end passes through the second through hole 7312 opened at the bottom end of the sleeve 731. The retaining ring 733 and the return spring 734 are both located in the sleeve 731. The sleeve 731 is fitted inside the material-taking shaft 732. The outer ring of the retaining ring 733 is supported on the annular ridge 738 formed on the inner wall of the sleeve 731, and its inner ring is supported on the shoulder 7321 formed in the middle of the material-taking shaft 732. The top end of the return spring 734 abuts against the top wall of the sleeve 731, and its bottom end abuts against the top end of the retaining ring 733. The press-fitting sleeve 735 is installed at the bottom end of the sleeve 731 and fitted onto the material-taking shaft 732. The inverted frustum 736 is installed at the bottom end of the material-taking shaft 732. Several limiting members 737 are installed on the bottom peripheral wall of the material-taking shaft 732. Through the setting of the material-taking press-fitting assembly 730, the material can be accurately assembled regardless of whether there is a step in the inner hole of the product, and the compatibility is strong. Specifically, the limiting member 737 is evenly distributed along the circumference of the feeding shaft 732; the outer surface of the limiting member 737 includes an arc surface 7371, a straight surface 7372 and an inclined surface 7373 connected sequentially from top to bottom, and the inclined surface 7373 is seamlessly connected to the peripheral wall of the inverted frustum 736.

[0044] like Figure 3 , Figure 4 , Figure 8 and Figure 9As shown, the material distribution mechanism 500 includes a frame 510, a material distribution motor 520, a rotating shaft 530, a material distribution plate 540, a lifting column 550, a clamping spring 560, and a first through-beam sensor 570. The frame 510 is located below the worktable 200, and its top four corners are connected to the worktable 200 via short shafts. The material distribution motor 520 is vertically mounted in the middle of the bottom end of the frame 510, and its output end is connected to the bottom end of the rotating shaft 530 via a coupling. The middle of the rotating shaft 530 is rotatably connected to the middle of the top end of the frame 510, and its top end is connected to the middle of the bottom end of the material distribution plate 540. The material distribution plate 540 is located in... The lifting column 550 and the clamping spring 560 are both located within the stepped cavity 541 of the distribution plate 540. The lifting column 550 slides within the stepped cavity 541. The top end of the clamping spring 560 abuts against the bottom end of the lifting column 550, and its bottom end abuts against the bottom wall of the stepped cavity 541. The top end of the distribution plate 540 has a notch 542 that communicates with the stepped cavity 541. The first through-beam sensor 570 is located on the left and right sides of the front end of the worktable 200. The top end of the distribution plate 540 has a clearance channel 543. Specifically, the outer diameter of the top end of the lifting column 550 is slightly larger than the inner diameter of the material and smaller than the outer diameter of the material; the force of the return spring 734 is greater than the force of the clamping spring 560; there are two notches 542, symmetrically arranged, and the cross-section of the notches 542 is U-shaped.

[0045] During storage, the misalignment mechanism 400 first pushes a material in the feeding channel 300 into a notch 542 of the distribution plate 540. Then, the distribution motor 520 drives the distribution plate 540 to rotate 180 degrees, and the misalignment mechanism 400 then pushes a material in the feeding channel 300 into another notch 542 of the distribution plate 540. During material handling, the two-dimensional motion component 720 drives the material handling and pressing component 730 to move laterally to directly above the material distribution mechanism 500, and then drives the material handling and pressing component 730 to descend until the material handling shaft 732 contacts and presses down the lifting column 550. The lifting column 550 descends in the stepped cavity 541 and squeezes the top spring 560. As the material handling shaft 732 descends, the inclined surface 7373 of the limiting component 737 contacts the inner ring of the material and slightly opens the material. Then the inner ring of the material slides over the straight surface 7372 of the limiting component 737, and the material shrinks and contacts the arc surface 7371 of the limiting component 737, thus realizing material handling. During pressing, the two-dimensional motion component 720 drives the material picking and pressing component 730 to move laterally to directly above the transfer fixture 600, and then drives the material picking and pressing component 730 to descend until the material picking shaft 732 contacts the bottom wall of the inner hole of the product. As the vertical module 722 continues to drive the material picking and pressing component 730 to descend, the sleeve 731 compresses the return spring 734 and moves downward relative to the material picking shaft 732 until the material is peeled off from the material picking shaft 732, thus realizing the assembly.

[0046] like Figure 3and Figure 4 As shown, the feeding mechanism 400 includes a feeding cylinder 410 and a pushing block 420. The feeding cylinder 410 is longitudinally mounted on the table surface of the worktable 200, and its driving end is connected to the rear end of the pushing block 420. The pushing block 420 is longitudinally arranged on the worktable 200. The feeding cylinder 410 drives the pushing block 420 to move longitudinally, pushing the material into the notch 542.

[0047] like Figure 3 , Figure 10 and Figure 11 As shown, the transfer fixture 600 includes a base plate 610, a boss 620, a placement seat 630, and a stop pin 640. The base plate 610 is mounted on the production line. The boss 620 is mounted at the top center of the base plate 610. The bottom end of the placement seat 630 is inserted into the fourth through hole 621 in the center of the boss 620 and is detachably connected to the boss 620 via the stop pin 640. The stop pin 640 enables a detachable connection between the placement seat 630 and the boss 620, facilitating quick replacement of the placement seat 630 and ensuring compatibility with multiple products. Specifically, there are two bosses 620.

[0048] Example 2

[0049] An automatic assembly method for a ring-shaped workpiece includes the following steps:

[0050] S1. Feeding: Materials are conveyed in an orderly manner into the feeding channel 300;

[0051] S2. Material distribution: The material distribution mechanism 400 pushes the material in the feeding channel 300 into the material distribution mechanism 500 for storage;

[0052] S3. Material picking and pressing: The material picking and pressing mechanism 700 picks up the material stored on the material distribution mechanism 500 and assembles it into the product on the transfer fixture 600.

[0053] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic assembly device for a ring-shaped workpiece, comprising a column (100), a worktable (200) longitudinally mounted on the top of the column (100), and a feeding channel (300) transversely mounted in the middle of the worktable (200), characterized in that, Also includes: The feeding mechanism (400) is installed longitudinally at the rear of the workbench (200) to push out the material in the feeding channel (300); The material distribution mechanism (500) is vertically installed at the front end of the workbench (200) to store the material pushed out in the feeding channel (300); The transfer fixture (600) is located on the right side of the workbench (200) and is conveyed by the line; And a material handling and pressing mechanism (700) is installed on the top of the workbench (200) to take away the material stored on the material distribution mechanism (500) and assemble it into the product on the transfer fixture (600); The material handling and pressing mechanism (700) includes a bracket (710), a two-dimensional motion component (720), and a material handling and pressing component (730). The bracket (710) is horizontally installed at the rear top of the workbench (200). The two-dimensional motion component (720) is installed on the bracket (710). The material handling and pressing component (730) is vertically installed at the drive end of the two-dimensional motion component (720). The material handling and pressing assembly (730) includes a sleeve (731), a material handling shaft (732), a retaining ring (733), a return spring (734), a pressing sleeve (735), a truncated cone (736), and a limiting member (737). The sleeve (731) is a hollow structure. The material handling shaft (732) is coaxially arranged inside the sleeve (731) and has a clearance fit with the sleeve (731). The top end of the material handling shaft (732) passes through the first through hole (7311) opened at the top end of the sleeve (731), and its bottom end passes through the second through hole (7312) opened at the bottom end of the sleeve (731). The retaining ring (733) and the return spring (734) are both located in the sleeve (731). 31) Inside, and sleeved on the picking shaft (732), the outer ring of the retaining ring (733) is supported on the annular ridge (738) formed on the inner wall of the sleeve (731), and its inner ring is supported on the shoulder (7321) formed in the middle of the picking shaft (732). The top end of the return spring (734) abuts against the top wall of the sleeve (731), and its bottom end abuts against the top end of the retaining ring (733). The press sleeve (735) is installed at the bottom end of the sleeve (731) and sleeved on the picking shaft (732). The inverted truncated cone (736) is installed at the bottom end of the picking shaft (732). There are several limiting members (737) installed on the bottom peripheral wall of the picking shaft (732). The outer surface of the limiting member (737) includes an arc surface (7371), a straight surface (7372) and an inclined surface (7373) connected sequentially from top to bottom. The inclined surface (7373) is seamlessly connected to the peripheral wall of the inverted frustum (736). The two-dimensional motion component (720) includes a horizontal module (721) and a vertical module (722). The horizontal module (721) is mounted on the top of the bracket (710), and the vertical module (722) is mounted on the slide plate of the horizontal module (721). The material handling and pressing component (730) is mounted on the slide plate of the vertical module (722).

2. The automatic assembly device for annular workpieces according to claim 1, characterized in that, The material distribution mechanism (500) includes a frame (510), a material distribution motor (520), a rotating shaft (530), a material distribution plate (540), a lifting column (550), a clamping spring (560), and a first through-beam sensor (570). The frame (510) is located below the workbench (200), and its top four corners are connected to the workbench (200) via short shafts. The material distribution motor (520) is vertically installed at the bottom center of the frame (510), and its output end is connected to the bottom of the rotating shaft (530) via a coupling. The middle of the rotating shaft (530) is rotatably connected to the top center of the frame (510), and its top is connected to the bottom center of the material distribution plate (540). The material distribution plate (540) is located on the workbench (510). The third through hole (210) at the front end of the workbench (200) is provided with a clearance fit. The lifting column (550) and the top spring (560) are both provided in the stepped cavity (541) inside the material distribution plate (540). The lifting column (550) and the stepped cavity (541) are slidably fitted. The top end of the top spring (560) abuts against the bottom end of the lifting column (550) and its bottom end abuts against the bottom wall of the stepped cavity (541). The top end of the material distribution plate (540) is provided with a notch (542) that communicates with the stepped cavity (541). The first through-beam sensor (570) is provided on the left and right sides of the front end of the workbench (200). The top end of the material distribution plate (540) is provided with an avoidance channel (543).

3. The automatic assembly device for annular workpieces according to claim 1, characterized in that, The material misalignment mechanism (400) includes a material misalignment cylinder (410) and a pusher block (420). The material misalignment cylinder (410) is longitudinally mounted on the table surface of the workbench (200), and its driving end is connected to the rear end of the pusher block (420). The pusher block (420) is longitudinally arranged on the workbench (200).

4. The automatic assembly device for annular workpieces according to claim 1, characterized in that, The transfer fixture (600) includes a base plate (610), a boss (620), a placement seat (630), and a stop pin (640). The base plate (610) is mounted on the line body. The boss (620) is mounted on the top center of the base plate (610). The bottom end of the placement seat (630) is inserted into the fourth through hole (621) opened in the center of the boss (620) and is detachably connected to the boss (620) through the stop pin (640).

5. The automatic assembly device for annular workpieces according to claim 1, characterized in that, The feeding channel (300) includes a guide plate (310), a reference block (320), and a second through-beam sensor (330). The guide plate (310) is horizontally arranged on the table surface of the workbench (200). There are two guide plates (310) arranged side by side with intervals. Grooves (311) are symmetrically opened at the bottom ends of opposite sides of the guide plates (310). The reference blocks (320) are arranged at intervals on the right side of the guide plates (310). The second through-beam sensor (330) is arranged at the top of the reference block (320) and the bottom end of the workbench (200). A clearance through hole (220) is opened in the middle of the workbench (200).

6. An assembly method based on the automatic assembly device for annular workpieces according to any one of claims 1-5, characterized in that, The steps are as follows: S1. Feeding: Materials are conveyed in an orderly manner into the feeding channel (300); S2. Material distribution: The material distribution mechanism (400) pushes the material in the feeding channel (300) into the material distribution mechanism (500) for storage; S3. Material taking and pressing: The material taking and pressing mechanism (700) takes away the material stored on the material distribution mechanism (500) and assembles it into the product on the transfer fixture (600).

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