Circular workpiece assembly mechanism and method of assembly

Abstract

The application relates to the technical field of O-shaped sealing ring assembly, in particular to a circular workpiece assembly mechanism and an assembly method thereof, which comprises a stand column installed on a workbench, a positioning platform installed at the top end of the stand column and a support installed at the front end of the positioning platform, further comprises a positioning assembly, a pushing assembly, a suction and pressing assembly and an X-direction carrying module, the positioning assembly is vertically installed at the rear end of the bottom surface of the positioning platform and is used for center positioning of the circular workpiece; the pushing assembly is horizontally installed at the middle part of the top surface of the positioning platform along the Y direction and is used for pushing the circular workpiece into the positioning assembly; the suction and pressing assembly is vertically arranged above the positioning platform and is used for sucking and pressing the circular workpiece positioned on the positioning assembly; the X-direction carrying module is horizontally installed at the top end of the support along the X direction, and a slider on the X-direction carrying module is connected with the suction and pressing assembly; the application has the advantages of simple structure design, full automation, high assembly precision and compatibility with multiple products.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of O-ring assembly, in particular to a circular workpiece assembly mechanism and an assembly method thereof. BACKGROUND

[0002] In the use of O-ring, there are two sealing forms of radial sealing and end face sealing. The radial sealing is mainly assembled by two methods: O-ring clamp jaw and expansion shaft. The principles of the two methods are similar. The inner diameter of the O-ring is expanded by the clamp jaw or the expansion shaft, and then the O-ring is pushed off by the pushing mechanism and fitted on the product.

[0003] In the assembly process of the automobile pressure sensor, the O-ring is mainly in the form of end face sealing, that is, the O-ring is assembled in the hole. The above two assembly methods are not applicable. The traditional assembly method usually adopts manual assembly, which is time-consuming and laborious, and has low assembly efficiency and low assembly precision. At present, there are also special assembly equipment for hole assembly on the market, but its structure is complex, the assembly precision is limited, and it is limited in application for the products with steps in the hole (such as Figure 12 ), so it cannot be compatible with multiple products. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a circular workpiece assembly mechanism and an assembly method thereof, which has simple structure design, full automation, high assembly precision and compatibility with multiple products.

[0005] The technical solution adopted by the present application to solve the technical problem is: a circular workpiece assembly mechanism, comprising a stand column installed on a workbench, a positioning platform installed at the top end of the stand column, and a bracket installed at the front end of the positioning platform, further comprising

[0006] A positioning assembly is vertically installed at the rear end of the bottom surface of the positioning platform, which is used for center positioning of the circular workpiece;

[0007] A pushing assembly is horizontally installed along the Y direction at the middle part of the top surface of the positioning platform, which is used for pushing the circular workpiece into the positioning assembly;

[0008] A suction and press assembly is vertically arranged above the positioning platform, which is used for suction and press assembly of the circular workpiece centered and positioned on the positioning assembly;

[0009] An X-direction carrying module is horizontally installed along the X direction at the top end of the bracket, and the upper slide block thereof is connected with the suction and press assembly.

[0010] Further, the suction and press assembly comprises a Z-direction lifting module, a mounting seat and a suction and press group, the Z-direction lifting module is vertically installed on the sliding block of the X-direction carrying module, the mounting seat is installed on the sliding block of the Z-direction lifting module, and the suction and press group is vertically installed on the mounting seat.

[0011] Further, the suction and press group comprises a shell, a mandrel, an adapter nut, an air source joint, a suction disc and a sealing ring, the shell is internally provided with a cavity, the mandrel and the suction disc are coaxially arranged in the cavity and gaps exist between the mandrel and the suction disc and the cavity, the suction disc is installed at the bottom end of the mandrel, the middle and lower part of the mandrel is protrudingly formed with an annular rib, the top surface of the annular rib is in contact with the lower step surface formed in the cavity, a plurality of radial holes are formed in the annular rib in the circumferential direction, an axial air channel is formed in the mandrel, the bottom end of the axial air channel is communicated with the gaps through the radial holes, a through hole is formed in the middle part of the mounting seat in the Z-direction, the adapter nut is installed at the top end of the mounting seat and its bottom end extends into the through hole, the top end of the shell extends into the through hole and sheaths the bottom end of the adapter nut, the top end of the mandrel is connected with the bottom end of the adapter nut, the air source joint is installed at the top end of the adapter nut and communicated with the axial air channel, the sealing ring is sleeved on the mandrel and in contact with the inner wall of the cavity, and the sealing ring is located above the annular rib.

[0012] Further, the suction and press group further comprises a first spring and a second spring, the first spring is sleeved on the upper part of the mandrel, the top end of the first spring is in contact with the bottom end of the adapter nut and its bottom end is in contact with the upper step surface formed in the cavity, the second spring is sleeved on the lower part of the mandrel, the top end of the second spring is in contact with the bottom surface of the annular rib and its bottom end is in contact with the top end of the suction disc, and the suction disc is slidingly sleeved on the bottom end of the mandrel.

[0013] Further, the bottom end of the shell is concavely formed with a first annular arc surface, the bottom end of the suction disc is concavely formed with a second annular arc surface, and the first annular arc surface and the second annular arc surface are matched with the circular workpiece.

[0014] Further, the positioning assembly comprises a mounting frame, a jacking cylinder, a positioning cylinder, a positioning cone and a fixing pin. The mounting frame is mounted at the rear end of the bottom surface of the positioning platform. A sliding hole is formed in the middle of the mounting frame along the Z direction. The jacking cylinder is vertically mounted at the bottom end of the mounting frame, and the driving end faces upward. The positioning cylinder is arranged in the sliding hole and is in sliding fit with the sliding hole. The driving end of the jacking cylinder extends into the sliding hole and is connected with the bottom end of the positioning cylinder. The positioning cylinder has a hollow structure. The positioning cone is arranged in the cavity of the positioning cylinder and is in clearance fit with the cavity of the positioning cylinder. A pin hole is formed in the cylinder body of the positioning cylinder along the axial direction. One end of the fixing pin is connected with the bottom end of the positioning cone, and the other end of the fixing pin penetrates through the pin hole and is connected with the mounting frame. The fixing pin is in sliding fit with the pin hole. The rear end of the positioning platform is provided with a positioning hole through which the positioning cylinder penetrates. The cone head of the positioning cone extends into the positioning hole.

[0015] Further, the pushing assembly comprises a pushing cylinder, a connecting plate, a small pushing plate and a large pushing plate. The pushing cylinder is horizontally mounted in the middle of the top surface of the positioning platform along the Y direction. One end of the connecting plate is connected with the driving end of the pushing cylinder, and the other end of the connecting plate is connected with the top end of the small pushing plate. The large pushing plate is mounted on the left side of the small pushing plate.

[0016] Further, the pushing assembly further comprises a guide group for guiding the workpiece to the positioning hole during the pushing process. The guide group comprises a left guide block and a right guide block. The left guide block is mounted at the rear end of the top surface of the positioning platform and is located at the left end of the positioning hole. The right guide block is mounted at the rear end of the top surface of the positioning platform and is located at the right end of the positioning hole. The front end of the left guide block is formed with a guide surface. The front end of the right guide block is provided with an inductor.

[0017] Further, a material guiding assembly is further provided. The material guiding assembly comprises a stop block and a pressing plate. The stop block is mounted at the rear end of the top surface of the positioning platform. The stop block is provided in two pieces and is spaced apart along the Y direction. The pressing plate is arranged above the positioning platform and is located between the two stop blocks. Limiting grooves are formed at the bottom ends of the opposite sides of the stop block. The left end of the limiting groove is formed with a guide surface.

[0018] An assembly method based on the above-mentioned circular workpiece assembly mechanism is provided. The steps are as follows:

[0019] S1. Positioning: The pushing assembly pushes the circular workpiece onto the positioning assembly, and the positioning assembly positions the center of the circular workpiece.

[0020] S2. Suction: The X-direction carrying module moves the suction and pressing assembly above the positioning assembly, and then sucks the circular workpiece positioned at the center.

[0021] S3. Pressing: The X-direction carrying module moves the suction and pressing assembly above the product, and then presses the circular workpiece into the product hole.

[0022] The beneficial effects of the present application are:

[0023] (1) The present application pushes the circular workpiece in order to the positioning assembly by the pushing assembly, and the positioning assembly is automatically positioned for precise suction of the suction and press assembly, and then the suction and press assembly of the suction circular workpiece is carried to the product by the X direction carrying module, and the suction and press assembly is precisely pressed into the product hole, which has high automation degree and high assembly precision, and the suction and press of the circular workpiece are integrated on the suction and press assembly, which simplifies the structure;

[0024] (2) The present application is designed to cooperate with the gap of the cavity, so that the shell can move up and down relative to the mandrel and the suction cup, so that the assembly of the circular workpiece can be realized whether there is a step in the product hole or not, and the compatibility of multiple products can be realized;

[0025] (3) The present application is provided with the first spring and the second spring, which realizes the buffer of the product during the press assembly of the circular workpiece, and avoids the over-pressing of the product;

[0026] (4) The present application is designed to cooperate with the gap of the positioning cone and the positioning cylinder cavity, so that the positioning cylinder can move up and down relative to the positioning cone, and when the positioning cone positions the center of the circular workpiece, the positioning cylinder always supports the circular workpiece, so that the circular workpiece is horizontally positioned on the positioning cone, and the circular workpiece is prevented from being obliquely fitted on the positioning cone. BRIEF DESCRIPTION OF DRAWINGS

[0027] The present application will be further described below in combination with the drawings and examples.

[0028] Figure 1 is a structural schematic diagram of the present application;

[0029] Figure 2 is a schematic diagram of the suction and press assembly in the present application;

[0030] Figure 3 is an appearance diagram of the suction and press assembly in the present application;

[0031] Figure 4 is a sectional view of the suction and press assembly in the present application;

[0032] Figure 5 is a schematic diagram of the shell in the present application;

[0033] Figure 6 is a schematic diagram of the mandrel in the present application;

[0034] Figure 7 is a schematic diagram of the pushing assembly in the present application;

[0035] Figure 8 is a schematic diagram of the positioning assembly in the present application;

[0036] Figure 9 is a schematic diagram of the positioning cylinder in the present application;

[0037] Figure 10 is a schematic diagram of the guide group in the present application;

[0038] Figure 11 is a schematic diagram of the material guiding assembly in the present application;

[0039] Figure 12 is a schematic diagram of the product hole with steps;

[0040] Figure 13 is a schematic diagram of the assembly of circular workpieces.

[0041] In the figure: 100, column; 200, positioning platform; 300, support; 400, positioning assembly; 410, mounting frame; 420, jacking cylinder; 430, positioning cylinder; 440, positioning cone; 450, fixing pin; 460, sliding hole; 470, pin hole; 480, positioning hole; 500, material pushing assembly; 510, material pushing cylinder; 520, connecting plate; 530, small material pushing plate; 540, large material pushing plate; 550, guide group; 551, left guide block; 552, right guide block; 553, guide surface; 554, inductor; 600, suction and press-fitting assembly; 610, Z-direction lifting module; 620, mounting seat; 630, suction and press-fitting group; 631, shell; 632, mandrel; 633, adapter nut; 634, gas source connector; 635, suction cup; 636, sealing ring; 637, cavity; 638, gap; 639, annular protrusion; 6310, lower step surface; 6311, radial hole; 6312, axial air channel; 6313, through hole; 6314, first spring; 6315, second spring; 6316, upper step surface; 700, X-direction carrying module; 800, first annular curved surface; 900, second annular curved surface; 1000, material guiding assembly; 1010, stop block; 1020, pressing plate; 1030, limiting groove; 1040, guide surface. DETAILED DESCRIPTION

[0042] The present application will now be further described in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams and only schematically illustrate the basic structure of the present application, and thus only show the components related to the present application.

[0043] Example 1.

[0044] As Figure 1As shown in the figure, a circular workpiece assembly mechanism includes a column 100 mounted on a workbench, a positioning platform 200 mounted at the top end of the column 100, and a bracket 300 mounted at the front end of the positioning platform 200, and further includes a positioning assembly 400, a pushing assembly 500, a suction and pressing assembly 600, and an X-direction carrying module 700. The positioning assembly 400 is vertically mounted at the rear end of the bottom surface of the positioning platform 200, and is used for center positioning of the circular workpiece; the pushing assembly 500 is horizontally mounted along the Y-direction in the middle of the top surface of the positioning platform 200, and is used for pushing the circular workpiece onto the positioning assembly 400; the suction and pressing assembly 600 is vertically arranged above the positioning platform 200, and is used for suction and pressing of the circular workpiece that has been center positioned on the positioning assembly 400; and the X-direction carrying module 700 is horizontally mounted along the X-direction at the top end of the bracket 300, and the slider thereon is connected with the suction and pressing assembly 600. The circular workpiece is orderly pushed by the pushing assembly 500 onto the positioning assembly 400, and after automatic positioning by the positioning assembly 400, the suction and pressing assembly 600 precisely sucks, and then the X-direction carrying module 700 carries the suction and pressing assembly 600 that has sucked the circular workpiece to above the product, and the suction and pressing assembly 600 precisely presses into the product hole, with high automation degree and high assembly precision. The suction and pressing of the circular workpiece are integrated on the suction and pressing assembly 600, simplifying the structure. Specifically, the X-direction carrying module 700 is a linear module, which belongs to the prior art and will not be described in detail here.

[0045] As shown in the figure, Figure 1 and Figure 2 As shown in the figure, the suction and pressing assembly 600 includes a Z-direction lifting module 610, a mounting seat 620, and a suction and pressing group 630. The Z-direction lifting module 610 is vertically mounted on the slider of the X-direction carrying module 700, the mounting seat 620 is mounted on the slider of the Z-direction lifting module 610, and the suction and pressing group 630 is vertically mounted on the mounting seat 620. The Z-direction lifting module 610 drives the mounting seat 620 to synchronously drive the suction and pressing group 630 to rise and fall, so that the suction and pressing group 630 realizes suction and pressing of the circular workpiece. Specifically, the Z-direction lifting module 610 is a linear module.

[0046] As shown in the figure, Figures 2-6As shown, the suction press-fitting group 630 comprises a shell 631, a mandrel 632, an adapter nut 633, a gas source connector 634, a suction cup 635 and a sealing ring 636. The shell 631 is provided with a cavity 637 inside. The mandrel 632 and the suction cup 635 are coaxially arranged in the cavity 637 and are both provided with a gap 638 with the cavity 637. The gap 638 allows the shell 631 to move up and down relative to the mandrel 632 and the suction cup 635. The suction cup 635 is installed at the bottom end of the mandrel 632. The middle and lower part of the mandrel 632 is protrudingly provided with an annular rib 639. The top surface of the annular rib 639 is in contact with a lower step surface 6310 formed in the cavity 637. In this way, the annular rib 639 supports the shell 631, avoiding the shell 631 from falling off. A plurality of radial holes 6311 are formed in the annular rib 639 in the circumferential direction. An axial air channel 6312 is formed in the mandrel 632. The bottom end of the axial air channel 6312 is communicated with the gap 638 through the radial holes 6311. A through hole 6313 is formed in the middle of the mounting seat 620 in the Z direction. The adapter nut 633 is installed at the top end of the mounting seat 620 and its bottom end extends into the through hole 6313. The top end of the shell 631 extends into the through hole 6313 and is sleeved on the bottom end of the adapter nut 633. The top end of the mandrel 632 is connected with the bottom end of the adapter nut 633. The gas source connector 634 is installed at the top end of the adapter nut 633 and is communicated with the axial air channel 6312. The sealing ring 636 is sleeved on the mandrel 632 and is in contact with the inner wall of the cavity 637. The sealing ring 636 is located above the annular rib 639. The sealing ring 636 forms a closed air cavity together with the axial air channel 6312, the radial holes 6311 and the gap 638 below the sealing ring 636, so that the circular workpiece can be sucked. By designing the mandrel 632 and the suction cup 635 to match the gap of the cavity 637, the shell 631 can move up and down relative to the mandrel 632 and the suction cup 635, so that the assembly of the circular workpiece can be realized regardless of whether there is a step in the product hole, and the compatibility of multiple products can be realized. Specifically, the bottom end of the shell 631 is concavely formed with a first annular arc surface 800. The bottom end of the suction cup 635 is concavely formed with a second annular arc surface 900. The first annular arc surface 800 and the second annular arc surface 900 are both adapted to the circular workpiece. The first annular arc surface 800 and the second annular arc surface 900 can adapt to circular workpieces of different specifications. The gas source connector 634 is communicated with a gas source device (not shown in the figure).

[0047] When the circular workpiece is sucked, the Z-direction lifting module 610 drives the suction and press-fitting group 630 to move downward until the first annular arc surface 800 and the second annular arc surface 900 contact the circular workpiece positioned on the positioning assembly 400, and then the air source device is used to suck air, so that the negative pressure in the air cavity formed by the axial air channel 6312, the radial hole 6311 and the gap 638 below the sealing ring 636, thereby adsorbing the circular workpiece. When the product hole is free of steps, the Z-direction lifting module 610 drives the suction and press-fitting group 630 to move downward, the bottom end of the shell 631 and the bottom end of the suction disc 635 enter the product hole, and continue to penetrate, until the circular workpiece contacts the hole bottom, and then the air source device is used to inflate, so that the positive pressure is formed in the air cavity formed by the axial air channel 6312, the radial hole 6311 and the gap 638 below the sealing ring 636, the circular workpiece is blown off by the air pressure and is pressed into the hole bottom, thereby ensuring that the circular workpiece is in full and uniform contact with the hole bottom, and the assembly precision is high. When the product hole has steps, as shown in Figure 12 and Figure 13 , the Z-direction lifting module 610 drives the suction and press-fitting group 630 to move downward, the bottom end of the shell 631 and the bottom end of the suction disc 635 enter the product hole, and continue to penetrate, first the bottom end of the shell 631 contacts the step surface in the hole, and then the shell 631 is forced to move upward, and then continues to move downward and penetrates, until the circular workpiece contacts the step hole bottom, in the process of continuing to move downward and penetrate, the first annular arc surface 800 is separated from the circular workpiece, at this time the gap 638 below the sealing ring 636 is communicated with the step hole, and because the air source device continuously sucks air, the air in the step hole is exhausted, thereby ensuring that the circular workpiece is in smooth contact with the step hole bottom, and then the air source device is used to inflate, so that the positive pressure is formed in the air cavity formed by the axial air channel 6312, the radial hole 6311 and the gap 638 below the sealing ring 636, the circular workpiece is blown off by the air pressure and is pressed into the step hole bottom, thereby ensuring that the circular workpiece is in full and uniform contact with the step hole bottom.

[0048] As shown in Figure 4 , in order to avoid overpressure on the product in the process of press-fitting the circular workpiece, the suction and press-fitting group 630 is also provided with a first spring 6314 and a second spring 6315, the first spring 6314 is sleeved on the upper part of the mandrel 632, the top end of the first spring 6314 abuts against the bottom end of the adapter nut 633, and the bottom end thereof abuts against the upper step surface 6316 formed in the cavity 637, the second spring 6315 is sleeved on the lower part of the mandrel 632, the top end of the second spring 6315 abuts against the bottom surface of the annular protrusion 639, and the bottom end thereof abuts against the top end of the suction disc 635, and the suction disc 635 is slidably sleeved on the bottom end of the mandrel 632.

[0049] As shown in Figure 1 , Figure 8 and Figure 9As shown, the positioning assembly 400 comprises a mounting frame 410, a jacking cylinder 420, a positioning cylinder 430, a positioning cone 440 and a fixing pin 450, the mounting frame 410 is vertically mounted at the rear end of the bottom surface of the positioning platform 200, a sliding hole 460 is formed in the middle of the mounting frame 410 along the Z direction, the jacking cylinder 420 is vertically mounted at the bottom end of the mounting frame 410 with the driving end upward, the positioning cylinder 430 is arranged in the sliding hole 460 and slidably connected with the sliding hole 460, the driving end of the jacking cylinder 420 extends into the sliding hole 460 and is connected with the bottom end of the positioning cylinder 430, the positioning cylinder 430 has a hollow structure, the positioning cone 440 is arranged in the cavity of the positioning cylinder 430 and is in clearance fit with the cavity of the positioning cylinder 430, a pin hole 470 is formed in the cylinder body of the positioning cylinder 430 along the axial direction, one end of the fixing pin 450 is connected with the bottom end of the positioning cone 440 and the other end of the fixing pin 450 passes through the pin hole 470 and is connected with the mounting frame 410, the fixing pin 450 is in sliding fit with the pin hole 470, the rear end of the positioning platform 200 is provided with a positioning hole 480 through which the positioning cylinder 430 passes, and the cone head of the positioning cone 440 extends into the positioning hole 480. The clearance fit between the positioning cone 440 and the cavity of the positioning cylinder 430 enables the positioning cylinder 430 to move up and down relative to the positioning cone 440, when the positioning cone 440 is used to center the circular workpiece, the positioning cylinder 430 always supports the circular workpiece, so that the circular workpiece can be horizontally positioned on the positioning cone 440, and the inaccurate centering caused by the inclined fitting of the circular workpiece on the positioning cone 440 is avoided. Specifically, the upper part of the positioning cone 440 is in the shape of a circular cone.

[0050] When positioning, the pushing assembly 500 pushes the circular workpiece into the positioning hole 480, at this time, only the cone head of the positioning cone 440 needs to fall into the vertical projection of the inner hole of the circular workpiece, at this time, the positioning cylinder 430 supports the circular workpiece, then the jacking cylinder 420 drives the positioning cylinder 430 to slowly move downward, at this time, the circular workpiece falls in the positioning hole 480 and is centered by the positioning cone 440 in the process of falling, until the centering is achieved, at this time, the circular workpiece is in a horizontal state, then the jacking cylinder 420 drives the positioning cylinder 430 to move upward, and the circular workpiece centered is pushed out of the positioning hole 480.

[0051] It should be noted that the above positioning is for the circular workpiece with an outer diameter obviously smaller than the hole diameter of the positioning hole 480, if the outer diameter of the circular workpiece is almost equal to the hole diameter of the positioning hole 480, the centering can be directly achieved through the positioning hole 480.

[0052] As Figure 1 and Figure 7As shown in the drawings, the pushing assembly 500 comprises a pushing cylinder 510, a connecting plate 520, a small pushing plate 530 and a large pushing plate 540. The pushing cylinder 510 is horizontally installed in the middle of the top surface of the positioning platform 200 along the Y direction. One end of the connecting plate 520 is connected with the driving end of the pushing cylinder 510, and the other end is connected with the top end of the small pushing plate 530. The large pushing plate 540 is installed on the left side of the small pushing plate 530. The connecting plate 520 is driven by the pushing cylinder 510 to synchronously drive the small pushing plate 530 and the large pushing plate 540 to move towards the positioning hole 480, so as to push the circular workpiece into the positioning hole 480.

[0053] As shown in the drawings, Figure 7 , Figure 10 and Figure 11 , the pushing assembly 500 further comprises a guiding assembly 550 for guiding the circular workpiece to the positioning hole 480 during the pushing process. The guiding assembly 550 comprises a left guiding block 551 and a right guiding block 552. The left guiding block 551 is installed at the rear end of the top surface of the positioning platform 200 and located at the left end of the positioning hole 480. The right guiding block 552 is installed at the rear end of the top surface of the positioning platform 200 and located at the right end of the positioning hole 480. The front end of the left guiding block 551 is formed with a guiding surface 553 for guiding the circular workpiece to the positioning hole 480 during the pushing process. The front end of the right guiding block 552 is installed with an inductor 554 for sensing whether there is material, so as to realize automatic pushing.

[0054] As shown in the drawings, Figure 7 , Figure 10 and Figure 11 , the circular workpiece assembly mechanism further comprises a material guiding assembly 1000. The material guiding assembly 1000 comprises a stop block 1010 and a pressing plate 1020. The stop block 1010 is installed at the rear end of the top surface of the positioning platform 200. The stop block 1010 is in two pieces and is spaced apart along the Y direction. The pressing plate 1020 is arranged above the positioning platform 200 and between the two stop blocks 1010. Limiting grooves 1030 are formed at the bottom ends of the opposite sides of the stop block 1010. The left end of the limiting groove 1030 is formed with a guiding surface 1040. Through the arrangement of the material guiding assembly 1000, the circular workpiece is accurately guided to the pushing position, i.e. corresponding to the small pushing plate 530 and the large pushing plate 540. Specifically, the two guiding surfaces 1040 form a V-shaped pattern.

[0055] Embodiment 2.

[0056] A kind of assembly method based on the circular workpiece assembly mechanism described in embodiment 1, steps are as follows:

[0057] S1. Positioning: the pushing assembly 500 pushes the circular workpiece into the positioning assembly 400, and the positioning assembly 400 positions the circular workpiece at the center;

[0058] S2. Sucking: the X-direction carrying module 700 moves the sucking and pressing assembly 600 to the upper side of the positioning assembly 400, and then sucks the circular workpiece after being positioned at the center;

[0059] S3. Pressing: the X-direction carrying module 700 moves the sucking and pressing assembly 600 to the upper side of the product, and then presses the circular workpiece into the hole of the product.

[0060] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A circular workpiece assembling mechanism, comprising a column (100) installed on a workbench, a positioning platform (200) installed at the top end of the column (100), and a bracket (300) installed at the front end of the positioning platform (200), characterized in that: Also include Positioning assembly (400) is vertically installed at the bottom end of the positioning platform (200), for center positioning of the circular workpiece; Pushing assembly (500) is horizontally installed in the middle of the top surface of the positioning platform (200) along the Y direction, for pushing the circular workpiece into the positioning assembly (400); Suction and pressing assembly (600) is vertically arranged above the positioning platform (200), for suction and pressing of the circular workpiece centered on the positioning assembly (400); X direction carrying module (700) is horizontally installed at the top end of the support (300) along the X direction, and the slider thereon is connected with the suction and pressing assembly (600); The suction and pressing assembly (600) comprises a Z direction lifting module (610), a mounting seat (620) and a suction and pressing group (630), the Z direction lifting module (610) is vertically installed on the slider of the X direction carrying module (700), the mounting seat (620) is installed on the slider of the Z direction lifting module (610), and the suction and pressing group (630) is vertically installed on the mounting seat (620); The suction and pressing group (630) comprises a shell (631), a mandrel (632), an adapter nut (633), an air source connector (634), a suction cup (635) and a sealing ring (636), the shell (631) is provided with a cavity (637) therein, the mandrel (632) and the suction cup (635) are coaxially arranged in the cavity (637), and there is a gap (638) between the mandrel (632) and the suction cup (635) and the cavity (637), the suction cup (635) is installed at the bottom end of the mandrel (632), the middle lower part of the mandrel (632) protrudes to form an annular rib (639), the top surface of the annular rib (639) is in contact with a lower step surface (6310) formed in the cavity (637), a plurality of radial holes (6311) are formed in the annular rib (639) in the circumferential direction, an axial air channel (6312) is formed in the mandrel (632), the bottom end of the axial air channel (6312) is communicated with the gap (638) through the radial holes (6311), a through hole (6313) is formed in the middle of the mounting seat (620) along the Z direction, the adapter nut (633) is installed at the top end of the mounting seat (620), and the bottom end thereof extends into the through hole (6313), the top end of the shell (631) extends into the through hole (6313) and is sleeved on the bottom end of the adapter nut (633), the top end of the mandrel (632) is connected with the bottom end of the adapter nut (633), the air source connector (634) is installed at the top end of the adapter nut (633) and is communicated with the axial air channel (6312), the sealing ring (636) is sleeved on the mandrel (632) and is in contact with the inner wall of the cavity (637), and the sealing ring (636) is located above the annular rib (639); The suction pressing assembly (630) further comprises a first spring (6314) and a second spring (6315), the first spring (6314) is sleeved on the upper part of the mandrel (632), the top end of the first spring (6314) is in contact with the bottom end of the adapter nut (633), and the bottom end is in contact with the upper step surface (6316) formed in the cavity (637), the second spring (6315) is sleeved on the lower part of the mandrel (632), the top end of the second spring (6315) is in contact with the bottom surface of the annular convex rib (639), and the bottom end is in contact with the top end of the suction disc (635), the suction disc (635) is sleeved on the bottom end of the mandrel (632) in sliding mode; The bottom end of the shell (631) is concave to form a first annular arc surface (800), the bottom end of the suction disc (635) is concave to form a second annular arc surface (900), and the first annular arc surface (800) and the second annular arc surface (900) are matched with the circular workpiece.

2. The circular workpiece assembly mechanism of claim 1, wherein: The positioning assembly (400) comprises a mounting frame (410), a jacking cylinder (420), a positioning cylinder (430), a positioning cone (440) and a fixing pin (450), the mounting frame (410) is vertically installed at the bottom end of the rear end of the positioning platform (200), a sliding hole (460) is formed in the middle part of the mounting frame (410) along the Z direction, the jacking cylinder (420) is vertically installed at the bottom end of the mounting frame (410) with the driving end upward, the positioning cylinder (430) is arranged in the sliding hole (460) and is in sliding fit with the sliding hole (460), the driving end of the jacking cylinder (420) extends into the sliding hole (460) and is connected with the bottom end of the positioning cylinder (430), the positioning cylinder (430) is a hollow structure, the positioning cone (440) is arranged in the cavity of the positioning cylinder (430) and is in clearance fit with the cavity of the positioning cylinder (430), a pin hole (470) is formed in the cylinder body of the positioning cylinder (430) along the axial direction, one end of the fixing pin (450) is connected with the bottom end of the positioning cone (440) and the other end penetrates through the pin hole (470) and is connected with the mounting frame (410), the fixing pin (450) is in sliding fit with the pin hole (470), and the rear end of the positioning platform (200) is provided with a positioning hole (480) through which the positioning cylinder (430) penetrates, and the cone head of the positioning cone (440) extends into the positioning hole (480).

3. The circular workpiece assembly mechanism of claim 2, wherein: The pushing assembly (500) comprises a pushing cylinder (510), a connecting plate (520), a small pushing plate (530) and a large pushing plate (540), the pushing cylinder (510) is horizontally installed at the middle part of the top surface of the positioning platform (200) along the Y direction, one end of the connecting plate (520) is connected with the driving end of the pushing cylinder (510), and the other end is connected with the top end of the small pushing plate (530), and the large pushing plate (540) is installed on the left side of the small pushing plate (530).

4. The circular workpiece assembly mechanism of claim 3, wherein: The pushing assembly (500) further comprises a guiding group (550) for guiding the circular workpiece to the positioning hole (480) during the pushing process, the guiding group (550) comprises a left guiding block (551) and a right guiding block (552), the left guiding block (551) is installed at the rear end of the top surface of the positioning platform (200) and is located at the left end of the positioning hole (480), the right guiding block (552) is installed at the rear end of the top surface of the positioning platform (200) and is located at the right end of the positioning hole (480), the front end of the left guiding block (551) is formed with a guiding surface (553), and the front end of the right guiding block (552) is installed with an inductor (554).

5. The circular workpiece assembly mechanism of claim 1, wherein: The material guiding assembly (1000) comprises a stop block (1010) and a pressing plate (1020), the stop block (1010) is installed at the rear end of the top surface of the positioning platform (200), the stop block (1010) is two blocks and is arranged at intervals along the Y direction, the pressing plate (1020) is arranged above the positioning platform (200) and is located between the two stop blocks (1010), the bottom end of the opposite side surface of the stop block (1010) is respectively provided with a limiting groove (1030), and the left end of the limiting groove (1030) is formed with a guiding surface (1040).

6. A method of assembling a circular workpiece based on the assembly mechanism of any one of claims 1-5, characterized by: The steps are as follows: S1. Positioning: the pushing assembly (500) pushes the circular workpiece onto the positioning assembly (400), and the positioning assembly (400) positions the center of the circular workpiece; S2. Suction: the X-direction carrying module (700) moves the suction and pressing assembly (600) above the positioning assembly (400), and then sucks the circular workpiece positioned at the center; S3. Pressing: the X-direction carrying module (700) moves the suction and pressing assembly (600) above the product, and then presses the circular workpiece into the product hole.

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