An automated assembly station for piston subassembly components

Abstract

This application relates to an automated assembly table for piston subassemblies, comprising: a worktable; a turntable rotatably mounted on the worktable; a fixing component circumferentially disposed around the outer edge of the turntable for placing a threaded sleeve and a screw; a first assembly device, comprising several such devices for assembling metal annular parts onto the screw of the fixing component; second assembly devices, circumferentially spaced around the axis of the turntable for assembling annular seals onto the screw of the fixing component; and a detection device for detecting the assembled parts on the threaded sleeve and screw. A loading position is provided on one side of the worktable, which assists the operator in placing the threaded sleeve and screw onto the fixing component. The turntable can rotate so that the fixing component corresponds one-to-one with the loading position, the detection device, all the first assembly devices, and all the second assembly devices. Compared to traditional manual assembly lines, this significantly reduces the manpower required and labor intensity, greatly improves assembly efficiency, and drastically reduces the installation space required for the equipment.

Description

Technical Field

[0001] This application relates to the technical field of caliper piston subassembly assembly equipment, and in particular to an automated assembly table for piston subassembly components. Background Technology

[0002] Reference Figure 1 and Figure 2 The brake caliper is a crucial component of a disc brake system. It primarily receives hydraulic pressure from the master cylinder via the brake lines, which is then applied to the piston inside the caliper. The piston then pushes the brake pads, engaging the brake disc and generating friction to slow the vehicle. The piston, also known as the piston assembly, typically includes a piston, bushing, screw, two flat washers, an O-ring, and a miniature thrust bearing.

[0003] Reference Figure 1 and Figure 2 Traditional piston subassembly assembly lines typically involve manual assembly and testing. During assembly, the screw is first rotated and installed into the screw sleeve. Then, a flat washer is placed on the end of the screw, followed by a miniature flat bearing. Another flat washer is then placed on the end of the screw, and finally, an O-ring is placed on the end of the screw as a sealing component to complete the installation. After assembly, the assembly is visually inspected for any errors or omissions. Finally, the assembled screw sleeve and screw are installed into the piston to complete the piston subassembly assembly.

[0004] Traditional manual assembly lines require a large workforce and thus occupy a significant amount of space. They are also labor-intensive and have low assembly efficiency. Therefore, there is an urgent need for automated assembly equipment to assemble and inspect the components on the screw sleeves and bolts of the piston subassembly. Summary of the Invention

[0005] To address the problems of traditional manual assembly lines for brake caliper piston subassemblies, which require significant manpower, occupy a large space, are labor-intensive, and have low assembly efficiency, this application provides an automated assembly station for piston subassemblies.

[0006] The automated assembly table for a piston subassembly component provided in this application adopts the following technical solution:

[0007] An automated assembly table for a piston subassembly component includes:

[0008] Workbench;

[0009] The turntable is mounted on the worktable in a horizontal position.

[0010] The fasteners are evenly spaced around the outer edge of the turntable along the axis of the turntable, and are used to place and fix the assembled threaded sleeves and screws.

[0011] The first assembly device is provided with several circumferentially spaced around the axis of the turntable, for assembling metal ring-shaped parts onto the screws of the fixing parts.

[0012] The second assembly device, at least one of which is circumferentially spaced around the axis of the turntable, is used to assemble the annular seal onto the screw of the fixing member.

[0013] The testing device is used to detect the assembly sequence and number of metal ring-shaped parts and ring-shaped seals assembled on the screw of the fastener;

[0014] The workbench has a loading position on one side, which is used to help the operator place the screw sleeve and screw onto the fixing part. The turntable can be rotated so that the fixing part corresponds one-to-one with the loading position, the detection device, all the first assembly devices and all the second assembly devices.

[0015] By employing the above technical solution, compared to the traditional manual assembly line which requires multiple operators, this application automates the assembly of parts that originally required manual assembly through the cooperation of the first and second assembly devices, followed by inspection by a detection device. During operation, only one operator is needed to remove the assembled screw and threaded sleeve and place the unassembled screw and threaded sleeve onto the fixing part. This greatly reduces the manpower required and labor intensity. Furthermore, the assembly efficiency is greatly improved due to the automated assembly. Since fewer operators are required, the number of operating positions for operators is also reduced, resulting in a significant reduction in the overall installation space of the equipment.

[0016] Optionally, the first assembly device includes an alignment machine mounted on a workbench, a first drive mechanism mounted on the workbench, and a first picking head. The first picking head includes a vertically oriented first sleeve and a first slider slidably mounted inside the first sleeve. The upper end of the first sleeve is closed, and the lower end of the first sleeve is open. A first limiting ring is coaxially provided in the lower end of the first sleeve. A first mounting block is provided on the bottom wall of the first slider. The lower end of the first mounting block slides through the first limiting ring. An elastic element is provided inside the first sleeve. The elastic element is used to push the first slider against the first limiting ring. At this time, the bottom wall of the first mounting block is flush with the bottom wall of the first limiting ring. The lower end face of the first guide block is coaxially provided with a first guide block. The outer diameter of the first guide block is in clearance fit with the inner diameter of the ring part. The lower end of the first guide block is frustum-shaped to guide the ring part to slide and be sleeved on the first guide block. The bottom wall of the first mounting block is embedded with a plurality of first magnets. The first magnets are circumferentially spaced around the axis of the first guide block. The metal ring part to be taken is made of magnetic metal. The first magnet is used to attract the ring metal part. At this time, the ring metal part is in contact with the bottom wall of the first mounting block and the bottom wall of the first limiting ring. The first driving mechanism is used to drive the first picking head to pick up the material in the above manner and then drive the first picking head to sleeve the ring metal part on the end of the screw.

[0017] Optionally, the side wall of the first mounting block is provided with a plurality of mounting cylinders, each mounting cylinder corresponding to one of the first magnets, the first magnets being cylindrical and embedded in the mounting cylinders.

[0018] Optionally, the first limiting ring is made of insulating material, and the bottom wall of the first limiting ring is provided with two first conductive posts. The first driving mechanism is provided with a power source, and the two first conductive posts are respectively connected to the positive and negative terminals of the power source. When the annular metal part is attracted by the first magnet and fits against the bottom wall of the first limiting ring, the end faces of the two first conductive posts are both in contact with the end faces of the annular metal part, and the circuit is connected.

[0019] Optionally, the bottom wall of the first limiting ring is provided with at least one second conductive post. The second conductive post and the first conductive post are evenly spaced around the axis of the first guide block. The second conductive post is electrically connected to the positive terminal of the power supply. When the annular metal part is attracted by the first magnet and fits against the bottom wall of the first limiting ring, the end face of the second conductive post fits against the end face of the annular metal part.

[0020] Optionally, the bottom wall of the first limiting ring is provided with a plurality of mounting holes for mounting the first conductive post and the second conductive post. A plurality of clamping bolts are threaded on the side wall of the first limiting ring. The clamping bolts are made of conductive material. Each clamping bolt corresponds to one of the mounting holes. One end of each clamping bolt passes through the hole wall of the mounting hole and clamps against the first conductive post or the second conductive post. A fixing nut is threaded on the end of each clamping bolt for fixing the end of the wire.

[0021] Optionally, the second assembly device includes a vibratory feeder on the worktable, a second drive mechanism on the worktable, and a second material take-up head. The second material take-up head includes a vertical second sleeve and a second slider slidably installed inside the second sleeve. The upper end of the second sleeve is closed, and the lower end of the second sleeve is open. A second limiting ring is coaxially provided in the lower end of the second sleeve. A second mounting block is provided on the bottom wall of the second slider. The lower end of the second mounting block slides through the second limiting ring. An elastic element is provided inside the second sleeve. The elastic element is used to push the second slider against the second limiting ring. A guide portion is provided at the lower end of the second mounting block. The guide portion includes a second guide block integrally provided at the lower end of the second mounting block. The lower end of the second guide block is frustoconical to guide the annular seal to slide onto the lower end of the second mounting block. The outer diameter of the second mounting block is interference-fitted with the inner diameter of the annular seal. The second drive mechanism is used to drive the second material take-up head to take material in the above manner and then drive the second material take-up head to fit the annular seal onto the end of the screw.

[0022] Optionally, the lower ends of the first guide block and the second guide block are each provided with a top block, which is used to cooperate with the end of the screw to lift the first guide block or the second guide block.

[0023] Optionally, the inner wall of the second limiting ring is coaxially provided with an installation groove, and a U-shaped sealing ring is provided in the installation groove. The two sides of the larger diameter part of the U-shaped sealing ring abut against the bottom of the installation groove and the side wall of the second mounting block, respectively.

[0024] Optionally, the second guide block and the second limiting ring are fitted with a clearance fit, and the second slider and the second sleeve are fitted with a clearance fit. The side wall of the second sleeve located between its bottom and the second slider in the state of pressing against the second limiting ring is provided with an air inlet. The air inlet is equipped with an air pipe connector, which is connected to a vacuum pump. When the second mounting block removes the annular seal, the annular seal fits and presses against the bottom wall of the second limiting ring.

[0025] Optionally, the guide portion includes a cylindrical second guide block, which can be sleeved on the end of the screw. The end of the second guide block is chamfered to guide the annular seal to be tensioned and sleeved on the second guide block and the second mounting block. The sidewall of the second guide block is flush with the sidewall of the second mounting block.

[0026] In summary, compared to traditional manual assembly lines that require multiple operators, this application automates the assembly of parts that originally required manual assembly through the cooperation of a first assembly device and a second assembly device, followed by inspection by a detection device. During operation, only one operator is needed to remove the assembled screws and bushings and place the unassembled screws and bushings onto the fixing parts. This significantly reduces manpower requirements and labor intensity. Furthermore, the assembly efficiency is greatly improved due to the automated assembly process. The reduction in the number of operators also reduces the number of operating positions required, thereby significantly reducing the overall installation space of the equipment.

[0027] Meanwhile, by designing a first conductive post and a second conductive post on the first material picking head, real-time monitoring can be performed to determine whether material is being picked up. Real-time monitoring of the success of the annular seal is achieved by matching the gap between the second sleeve and the second slider, the gap between the second mounting block and the second limiting ring, and the vacuum pump connected to the second sleeve. This results in higher overall operational stability of the equipment. Attached Figure Description

[0028] Figure 1 This is the front view of the piston subassembly.

[0029] Figure 2 yes Figure 1 Sectional view of AA.

[0030] Figure 3 This is a three-dimensional structural diagram of this application.

[0031] Figure 4 This is a front view of the first material handling head of this application.

[0032] Figure 5 yes Figure 4 A cross-sectional view of BB.

[0033] Figure 6 This is a bottom view of the first material handling head of this application.

[0034] Figure 7 yes Figure 3 An enlarged schematic diagram of part A in the middle.

[0035] Figure 8 This is a front view of the second feed head of this application.

[0036] Figure 9 This is a side view of the second feed head of this application.

[0037] Figure 10 yes Figure 9 A sectional view of CC.

[0038] Figure 11 This is a side view of the second drive mechanism of this application.

[0039] Figure 12 This is a cross-sectional view of the second material handling head of this application, and the figure shows the third type of guide section.

[0040] Those skilled in the art will understand that the elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be enlarged relative to other elements to aid in understanding the embodiments of the invention.

[0041] Reference numerals: 1. Workbench; 11. Turntable; 12. Loading position; 13. Mounting plate; 2. Fixing component; 21. Base plate; 22. Fixing plate; 3. First assembly device; 31. Aligning machine; 32. First drive mechanism; 321. First translation cylinder; 322. First lifting cylinder; 323. First mounting plate; 4. Second assembly device; 41. Vibratory feeder; 42. Second drive mechanism; 421. Second translation cylinder; 422. Second lifting cylinder; 423. Second mounting plate; 5. Detection device; 51. Detection camera; 52. Lighting lamp; 6. First material handling head; 61. First sleeve; 62. First slider; 63. First limiting ring; 631. Mounting hole; 632. Tightening bolt; 633. Fixing nut; 64. First mounting plate 641. Mounting cylinder; 65. First guide block; 66. First magnet; 67. First conductive post; 68. Second conductive post; 7. Elastic element; 71. Spring; 8. Second feeding head; 81. Second sleeve; 811. Air inlet; 812. Mounting groove; 813. U-shaped sealing ring; 82. Second slider; 83. Second limiting ring; 84. Second mounting block; 85. Top block; 86. Air pipe connector; 9. Guide part; 91. Second guide block; 92. Connecting rod; 93. Push rod; 94. Vent hole; 95. Arc hole; 96. Guide plate; 97. Second magnet; 10. Piston sub-assembly; 101. Screw; 102. Screw sleeve; 103. Piston; 104. Flat washer; 105. Miniature flat bearing; 106. O-ring. Detailed Implementation

[0042] After assembling the piston subassembly 100 of the brake caliper, the screw sleeve 102 and the screw rod 101 are assembled, a flat washer 104, a miniature flat bearing 105, a flat washer 104 and an annular O-ring 106 need to be installed in sequence at the end of the screw rod 101.

[0043] The following is in conjunction with the appendix Figures 1-12 This application will be described in further detail.

[0044] This application discloses an automated assembly table for a piston subassembly of 10 components, referring to... Figure 3 It includes a worktable 1 and a turntable 11 rotatably mounted in the middle of the worktable 1, three first assembly devices 3, a second assembly device 4 and a detection device 5 provided on the worktable 1, and the turntable 11 is driven by a stepper motor.

[0045] The first assembly device 3 is used to assemble annular metal parts made of magnetic metal, specifically for assembling flat gaskets 104 and miniature flat bearings 105. The second assembly device 4 is used to assemble annular seals, specifically for assembling O-rings 106. The inspection device 5 includes an inspection camera 51 and an illumination lamp 52. The illumination lamp 52 illuminates the assembled threaded sleeve 102 and screw 101 on the fixing member 2, and then the inspection camera 51 takes pictures for visual inspection.

[0046] The turntable 11 is horizontal, and the worktable 1 is also fixedly installed with a mounting plate 13 that is coaxial with the turntable 11. The diameter of the mounting plate 13 is smaller than the diameter of the turntable 11.

[0047] The outer edge of the turntable 11 is provided with several fixing parts 2. The fixing parts 2 are used to place the assembled screw sleeves 102 and screws 101. The number of fixing parts 2 corresponds to the number of parts to be assembled. In this embodiment, since testing is required, and a loading position 12 is provided on one side of the workbench 1, the loading position 12 is used to help the operator place the screw sleeves 102 and screws 101 onto the fixing parts 2. Therefore, there are six fixing parts 2.

[0048] The mounting plate 13 is equipped with several infrared sensors on one side corresponding to the loading position 12. The infrared sensors detect the screws and bolts on the fixing parts 2 corresponding to the loading position 12. Only when the infrared sensors detect that the screws and bolts on the fixing parts 2 are all in the designated positions will the turntable 11 and the first assembly device 3 and the second assembly device 4 be started.

[0049] The fastener 2 includes a base plate 21 and a fixing plate 22. The fixing plate 22 is horizontal and is fixedly installed on the outer edge of the top wall of the mounting plate 13 by bolts. The base plate 21 is L-shaped, with the short side of the base plate 21 being horizontal and the long side of the base plate 21 being vertical. The top of the long side of the base plate 21 is fixedly connected to the bottom wall of the fixing plate 22.

[0050] The fixing plate 22 has at least one slot through it on the side opposite to the mounting plate 13; in this embodiment, two slots are used. The screw 101 and the sleeve 102 of the piston sub-assembly 10 are vertically inserted, with the upper end of the screw 101 engaging with the slot, and the lower end of the sleeve 102 abutting against the top wall of the base plate 21. The screw 101 and the sleeve 102 are vertically fixed to the turntable 11 through the engagement between the fixing plate 22 and the base plate 21.

[0051] The first assembly device 3 is arranged circumferentially around the axis of the turntable 11. The first assembly device 3 includes a aligner 31 fixedly installed on the workbench 1, a first drive mechanism 32 provided on the mounting plate 13, and a first material handling head 6. The three aligners 31 are fixedly installed circumferentially around the axis of the turntable 11 on the top wall of the workbench 1.

[0052] The first drive mechanism 32 includes a first translation cylinder 321 and a first lifting cylinder 322. The first translation cylinder 321 is fixedly mounted on the top wall of the mounting plate 13, and the piston rod of the first translation cylinder 321 slides radially along the mounting plate 13. The three first translation cylinders 321 correspond one-to-one with the three alignment machines 31.

[0053] The first lifting cylinder 322 is fixedly installed at the end of the piston rod of the first translation cylinder 321. The piston rod of the first lifting cylinder 322 extends and retracts vertically downward. The end of the piston rod of the first lifting cylinder 322 is fixedly installed with a first mounting plate 323. The first mounting plate 323 is horizontal. There are two first picking heads 6, both of which are located on the first mounting plate 323. The first picking heads 6 are used to pick up the flat pads 104 or miniature flat bearings 105 output by the corresponding alignment machine 31.

[0054] The first feeding head 6 includes a vertical first sleeve 61 and a first slider 62 slidably installed inside the first sleeve 61. The upper end of the first sleeve 61 is closed and the lower end of the first sleeve 61 is open. The first sleeve 61 is fixedly installed on the bottom wall of the first mounting plate 323.

[0055] A first limiting ring 63 is coaxially fixed to the lower end of the first sleeve 61 by bolts. The cross-section of the first limiting ring 63 is inverted T-shaped. The vertical end of the first limiting ring 63 slides into the lower end of the first sleeve 61, and the top wall of the horizontal end of the first limiting ring 63 fits tightly against the bottom wall of the first sleeve 61.

[0056] The first slider 62 can slide until its bottom wall is in contact with the top wall of the first limiting ring 63. The bottom wall of the first slider 62 is integrally provided with a cylindrical first mounting block 64. The side wall of the first mounting block 64 is integrally provided with three mounting cylinders 641. The mounting cylinders 641 have a lower opening. The mounting cylinders 641 are evenly spaced around the axis of the first mounting block 64. A first magnet 66 is fixedly embedded in the mounting cylinder 641. The end face of the first magnet 66 is flush with the bottom wall of the mounting cylinder 641. The bottom wall of the mounting cylinder 641 is flush with the bottom wall of the first mounting block 64.

[0057] The first mounting block 64 and the mounting sleeve 641 slide into the first limiting ring 63. The first sleeve 61 is provided with an elastic element 7, which is a spring 71. One end of the spring 71 is embedded in the bottom wall of the first sleeve 61, and the other end of the spring 71 passes through the first slider 62 and is embedded in the first mounting block 64. Under normal conditions, the spring 71 pushes the first slider 62 to fit against the top wall of the first limiting ring 63. At this time, the bottom wall of the first mounting block 64 is flush with the bottom wall of the first limiting ring 63.

[0058] The bottom wall of the first mounting block 64 is coaxially and integrally provided with a first guide block 65. The outer diameter of the first guide block 65 is clearance-fitted with the inner diameter of the flat washer 104 or the miniature plane bearing 105. The lower end of the first guide block 65 is frustoconical to guide the flat washer 104 or the miniature plane bearing 105 to slide and be sleeved on the first guide block 65. Then, under the magnetic attraction of the first magnet 66, they simultaneously adhere and press against the bottom wall of the first mounting block 64 and the first limiting ring 63.

[0059] The bottom wall of the first guide block 65 is integrally provided with a cylindrical top block 85. The top block 85 is made of a metal with a hardness lower than that of the screw 101, and the diameter of the top block 85 is smaller than the diameter of the bottom wall of the first guide block 65.

[0060] When the piston rod of the first translation cylinder 321 extends, the two first guide blocks 65 are moved to directly above the two annular metal workpieces at the discharge platform of the corresponding alignment machine 31. Then, the piston rod of the first lifting cylinder 322 extends, and the two first guide blocks 65 slide through the two annular metal workpieces. The annular metal workpieces are attracted and fixed by the first magnet 66. Then, the first lifting cylinder 322 and the first translation cylinder 321 are reset. At this time, the turntable 11 drives the fixing plate 22, the base plate 21, and the two screw sleeves 10. When screw 101 rotates to the designated position, the piston rod of the first lifting cylinder 322 extends, and the top blocks 85 of the two first guide blocks 65 respectively abut against the top wall of the corresponding screw 101. Under the push of screw 101, the first guide blocks 65 and the first mounting blocks 64 retract into the mounting cylinder 641. Under the push of the first limiting ring 63, the annular metal part separates from the first magnet 66 and is sleeved onto the end of screw 101. Then, under the push of gravity and the first limiting ring 63, it slides down to fit against the shoulder of the end of screw 101. Then, the first lifting cylinder 322 resets, and the spring 71 pushes out the first mounting blocks 64 and the first guide blocks 65 again to prepare for the next assembly.

[0061] When actually placing the annular metal part, the thrust of the screw 101 on the first guide block 65 will always generate a small radial force rather than a complete axial force. This may cause the first mounting block 64 to rotate, which may increase the wear between the first mounting block 64 and the first limiting ring 63. However, the limiting effect of the mounting cylinder 641 prevents the first mounting block 64 from rotating, thereby greatly reducing the wear rate between the first mounting block 64 and the first limiting ring 63.

[0062] Meanwhile, the installation cylinder 641 increases the contact area between the annular metal part and the first limiting ring 63, thereby reducing the pressure on both parties when the first limiting ring 63 pushes the annular metal part. This makes the annular metal part less prone to damage and further reduces the wear rate of the end face of the first limiting ring 63.

[0063] Meanwhile, by replacing the first guide block 65 with the top block 85, the top block 85 directly contacts the end of the screw 101, making the surface of the first guide block 65 less prone to damage. This makes it less likely that the part will be difficult to pick up due to damage to the surface of the first guide block 65.

[0064] Along the axial direction of the first guide block 65, the outline circle of the first magnet 66 is tangent to the outer edge outline of the first guide block 65, so that the adsorption part of the first magnet 66 on the annular metal workpiece is located in the middle of the annular metal workpiece, and the adsorption is more stable.

[0065] The first limiting ring 63 is made of insulating material. The bottom wall of the first limiting ring 63 is provided with three mounting holes 631 evenly spaced around its axis. A first conductive post 67 is slidably installed in two of the mounting holes 631, and a second conductive post 68 is slidably installed in the other mounting hole 631.

[0066] The first limiting ring 63 has three copper clamping bolts 632 threaded on its side wall. One end of each clamping bolt 632 passes through the wall of one of the three mounting holes 631 and clamps against two first conductive posts 67 and one second conductive post 68.

[0067] A power supply is fixedly installed on the mounting plate 13. A fixing nut 633 is threaded onto the end of the clamping bolt 632. The clamping bolt 632 is connected to the power supply through a wire, and the fixing nut 633 is used to fix the end of the wire. One of the first conductive posts 67 and the second conductive post 68 are both connected to the positive terminal of the power supply, and the remaining first conductive post 67 is connected to the negative terminal of the power supply.

[0068] When the annular metal part is attracted by the first magnet 66 and adheres to the bottom wall of the first limiting ring 63, the end faces of the two first conductive posts 67 and the end faces of the second conductive post 68 are all in contact with the end face of the annular metal part, and the circuit is connected. If the annular metal part is not picked up when it is being used, or if the annular metal part is not horizontal after being picked up, at least one current circuit will be disconnected. In this case, the piston rod of the first lifting cylinder 322 needs to repeatedly extend and retract until the entire circuit is connected to ensure correct material picking.

[0069] The above detection method enables real-time monitoring of material handling, effectively preventing issues such as failure to handle material or misalignment of the annular metal parts after handling, which could lead to incomplete assembly or damage to the surface of the screw 101, resulting in a reduced sealing effect of the O-ring 106.

[0070] The second assembly device 4 is arranged circumferentially around the axis of the turntable 11 in cooperation with the first assembly device 3. The second assembly device 4 includes a vibratory plate 41 fixedly installed on the worktable 1, a second drive mechanism 42 provided on the mounting plate 13, and a second material take-up head 8.

[0071] The second drive mechanism 42 includes a second translation cylinder 421 and a second lifting cylinder 422. The second translation cylinder 421 is fixedly mounted on the top wall of the mounting plate 13, and the piston rod of the second translation cylinder 421 slides radially along the mounting plate 13. The second translation cylinder 421 corresponds to the vibratory plate 41.

[0072] The second lifting cylinder 422 is fixedly installed at the end of the piston rod of the first translation cylinder 321. The piston rod of the second lifting cylinder 422 extends and retracts vertically downward. The end of the piston rod of the second lifting cylinder 422 is fixedly installed with a second mounting plate 423. The second mounting plate is horizontal. There are two second picking heads 8, both of which are located on the second mounting plate 423. The second picking heads 8 are used to pick up the O-rings 106 output by the corresponding vibratory plate 41.

[0073] The second feeding head 8 includes a vertical second sleeve 81 and a second slider 82 slidably installed inside the second sleeve 81. The upper end of the second sleeve 81 is closed and the lower end of the second sleeve 81 is open. The second sleeve 81 is fixedly installed on the bottom wall of the second mounting plate 423.

[0074] A second limiting ring 83 is coaxially fixed to the lower end of the second sleeve 81 by bolts. The cross-section of the second limiting ring 83 is also inverted T-shaped. The vertical end of the second limiting ring 83 slides into the lower end of the second sleeve 81, and the top wall of the horizontal end of the second limiting ring 83 fits tightly against the bottom wall of the second sleeve 81.

[0075] The second slider 82 can slide until its bottom wall fits against the top wall of the second limiting ring 83. The bottom wall of the second slider 82 is integrally provided with a cylindrical second mounting block 84, and the lower end of the second mounting block 84 slides through the second limiting ring 83.

[0076] The second sleeve 81 is equipped with the same elastic element 7 as the first sleeve 61. One end of the spring 71 is embedded in the bottom wall of the second sleeve 81, and the other end of the spring 71 passes through the second slider 82 and is embedded in the second mounting block 84. Under normal conditions, the spring 71 pushes the second slider 82 to fit against the top wall of the second limiting ring 83. At this time, the bottom wall of the second mounting block 84 passes through the second limiting ring 83.

[0077] The second mounting block 84 is interference-fitted with the O-ring 106, and the bottom wall of the second mounting block 84 is provided with a guide portion 9 for guiding the O-ring 106 to slide onto the second mounting block 84.

[0078] In the first case—that is, when the end sidewall of the screw 101 does not obstruct the sliding of the O-ring 106—the guide portion 9 adopts the following solution:

[0079] The guide portion 9 includes a cylindrical second guide block 91, which is coaxially and integrally disposed on the bottom wall of the second mounting block 84. The outer diameter of the second guide block 91 is interference-fitted with the inner diameter of the O-ring 106. The lower end of the second guide block 91 is frustoconical to guide the O-ring 106 to slide and be tensioned onto the lower end of the second mounting block 84. Then, the O-ring 106 is fitted onto the end of the screw 101 in the same manner as the aforementioned annular metal parts to complete the installation. The sidewall of the second guide block 91 is flush with the sidewall of the second mounting block 84.

[0080] The bottom wall of the second guide block 91 is also coaxially provided with a top block 85 that has the same shape and function as the first guide block 65.

[0081] Meanwhile, the limiting ring and the second sleeve 81 are sealed together, the second guide block 91 and the second limiting ring 83 are loosely fitted together, the second slider 82 and the second sleeve 81 are loosely fitted together, and the side wall of the second sleeve 81 between its bottom and the second slider 82 which is pressed against the second limiting ring 83 is provided with an air inlet 811. An air pipe connector 86 is fixedly installed in the air inlet 811 and is connected to the vacuum pump.

[0082] When the second mounting block 84 removes the O-ring 106, the O-ring 106 is in a state of being tightly pressed against the bottom wall of the second limiting ring 83. At this time, the vacuum pump starts to draw a vacuum. If the O-ring 106 is completely pressed against the bottom wall of the second limiting ring 83, the O-ring 106 seals the gap between the second limiting ring 83 and the second mounting block 84. After the vacuum pump detects the correct pressure during vacuuming, it sends a signal of successful material removal to the control center. If the O-ring 106 is not removed or is not completely pressed against the bottom wall of the second limiting ring 83, the second slider 82 will be lifted by atmospheric pressure during vacuuming, causing air to enter the second sleeve 81 along the gap between the second limiting block 83 and the second mounting block 84. As a result, the vacuum pump will continuously draw air during vacuuming, and the vacuum pump will detect abnormal vacuuming pressure. The second lifting cylinder 422 needs to repeat lifting and lowering to remove material until the vacuum pump detects that the vacuuming pressure is normal and then stops.

[0083] The above method makes it less likely that O-rings 106 will be missed or misaligned during installation, thus improving assembly stability.

[0084] A mounting groove 812 is coaxially formed on the side wall of the second limiting ring 83. A U-shaped sealing ring 813 is embedded in the mounting groove 812. The two sides of the larger diameter portion of the U-shaped sealing ring 813 abut against the bottom of the mounting groove 812 and the side wall of the second mounting block 84, respectively. The U-shaped sealing ring 813 is used to prevent air inside the sealed second sleeve 81 from flowing out to the outside through the gap between the second limiting ring 83 and the second mounting block 84. By sealing the gap between the second limiting ring 83 and the second mounting block 84 with the U-shaped sealing ring, it is difficult for external impurities to enter the second mounting sleeve 81 and interfere with the vacuum pump's vacuuming effect. Moreover, during vacuuming, outside air can still enter the second sleeve 81 normally without interfering with vacuuming detection.

[0085] Meanwhile, the U-shaped sealing ring 813 restricts the position of the second mounting block 84 and the second slider 82, so that during the reciprocating motion, the second mounting block 84 is less likely to touch the inner wall of the second limiting ring 83 and the second slider 82 is less likely to touch the inner wall of the second sleeve 81. This allows the second mounting block 84 and the second slider 82 to slide smoothly, and during vacuuming, the second limiting ring 83 or the inner wall of the second sleeve 81 is less likely to cause poor air intake and interfere with the air pressure detection during vacuuming.

[0086] When encountering an annular groove at the end of the screw 101 or other situations that may interfere with the fitting of the O-ring 106, the guide part 9 adopts the following technical solution:

[0087] The guide section 9 includes a cylindrical second guide block 91, which is integrally formed on the bottom wall of the second mounting block 84. The second guide block 91 is interference-fitted with the O-ring 106. The second guide block 91 can be sleeved on the end of the screw 101. The end of the second guide block 91 is chamfered to guide the annular seal to be tensioned and sleeved on the second guide block 91 and the second mounting block 84. The side wall of the second guide block 91 is flush with the side wall of the second mounting block 84. When the piston rod of the second lifting cylinder 422 extends, the second limiting ring 83 can push the O-ring 106 to abut against the flat washer of the screw 101.

[0088] The second guide block 91, when fitting the O-ring 106, firstly, the second guide block 91 is fitted onto the end of the screw 101 to cover the annular groove at the end of the screw 101, and then the O-ring 106 is fitted onto the screw 101, making the fitting of the O-ring 106 smoother.

[0089] Meanwhile, the guide section 9 can also adopt the following design to avoid the problem that the O-ring 106 is difficult to install when using the second type of second guide block 91, because the diameter of the second guide block 91 and the second mounting block 84 is relatively large:

[0090] The guide part 9 includes a plurality of guide plates 96 spaced circumferentially around the bottom wall of the second mounting block 84. One end of each guide plate 96 is provided with a connecting rod 92, which is perpendicular to the length direction of the guide plate 96. One end of the connecting rod 92 is integrally connected to one end of the guide plate 96, and the other end of the connecting rod 92 is rotatably connected to the bottom of the second mounting block 84. A second magnet 97 is embedded in the bottom wall of the second mounting block 84. The connecting rod 92 is made of magnetic metal. Under normal conditions, the connecting rod 92 is adhered to the bottom wall of the second mounting block 84 by the second magnet 97. At this time, the guide plate 96 is assembled with the side wall of the second mounting block 84, and the outer side wall of the guide plate 96 is flush with the side wall of the second mounting block 84.

[0091] The bottom wall of the second mounting block 84 has several arc-shaped holes 95. A push rod 93 is installed in the arc-shaped holes 95 in a sealed sliding manner. One end of the push rod 93 is integrally connected to the connecting rod 92. The rotation axis of the push rod 93 is coaxial with the rotation axis of the connecting rod 92. The interior of the second mounting block 84 has several vent holes 94. One end of the vent hole 94 is connected to and communicates with the arc-shaped holes 95 one by one. The other end of the vent hole 94 is connected to the spring 71 of the second mounting block 84.

[0092] The connecting rod 92 is radially distributed along the end face of the second mounting block 84. When the vacuum pump supplies air to the second sleeve 81, the push rod 93 slides under the pressure of the air, and then pushes the connecting rod 92 and the guide plate 96 to rotate. When the rotation reaches the specified angle, the end of the connecting rod 92 connected to the second mounting block 84 abuts against each other, and the guide plate 96 stops rotating. At this time, the O-ring 106 can be easily guided onto the second mounting block 84 through the conical guide plate 96.

[0093] Furthermore, since the second slider 82 and the second O-ring 106 are tightly fitted together, the gas inside the second sleeve 81 is not easily leaked when the second sleeve 81 is filled with air.

[0094] After the O-ring 106 is removed, a vacuum is drawn inside the second sleeve 81, and the connecting rod 92 and push rod 93 are reset under the action of the second magnet 97.

[0095] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automated assembly table for a piston subassembly component, characterized in that, include: Workbench (1); Turntable (11) is mounted on workbench (1) and is horizontal; The fastener (2) is evenly spaced around the axis of the turntable (11) on the outer edge of the turntable (11) and is used to place and fix the assembled threaded sleeve (102) and screw (101). The first assembly device (3) is provided with several circumferentially spaced around the axis of the turntable (11) for assembling metal ring-shaped parts onto the screws (101) of the fixing member (2); The second assembly device (4) has at least one, which is circumferentially spaced around the axis of the turntable (11) and is used to assemble the annular seal onto the screw (101) of the fixing member (2). The detection device (5) is used to detect the assembly sequence and number of metal ring parts and ring seals assembled on the screw (101) of the fastener (2); The workbench (1) has a loading position (12) on one side. The loading position (12) is used to assist the operator in placing the screw sleeve (102) and screw (101) onto the fixing part (2). The turntable (11) can rotate so that the fixing part (2) corresponds one-to-one with the loading position (12), the detection device (5), all the first assembly devices (3) and all the second assembly devices (4). The first assembly device (3) includes an aligner (31) on the workbench (1), a first drive mechanism (32) on the workbench (1) and a first picking head ( 6) The first feeding head (6) includes a vertical first sleeve (61) and a first slider (62) slidably installed inside the first sleeve (61). The upper end of the first sleeve (61) is closed, and the lower end of the first sleeve (61) is open. A first limiting ring (63) is coaxially provided in the lower end of the first sleeve (61). A first mounting block (64) is provided on the bottom wall of the first slider (62). The lower end of the first mounting block (64) slides through the first limiting ring (63). A spring is provided inside the first sleeve (61). The elastic element (7) is used to push the first slider (62) against the first limiting ring (63). At this time, the bottom wall of the first mounting block (64) is flush with the bottom wall of the first limiting ring (63). The lower end face of the first mounting block (64) is coaxially provided with a first guide block (65). The outer diameter of the first guide block (65) is clearance-fitted with the inner diameter of the annular part. The lower end of the first guide block (65) is frustoconical to guide the annular part to slide and be fitted onto the first guide block (65). The bottom wall of the first mounting block (64) is embedded with... A plurality of first magnets (66) are arranged circumferentially around the axis of the first guide block (65). The ring-shaped metal part to be taken is made of magnetic metal. The first magnets (66) are used to attract the ring-shaped metal part, and at this time the ring-shaped metal part is in contact with the bottom wall of the first mounting block (64) and the bottom wall of the first limiting ring (63). The first driving mechanism (32) is used to drive the first picking head (6) to pick up the material in the above manner and then drive the first picking head (6) to put the ring-shaped metal part on the end of the screw (101).

2. The automated assembly table for a piston subassembly component according to claim 1, characterized in that: The first mounting block (64) has a plurality of mounting cylinders (641) on its side wall. Each mounting cylinder (641) corresponds to one of the first magnets (66). The first magnets (66) are cylindrical and embedded in the mounting cylinders (641).

3. The automated assembly table for a piston subassembly component according to claim 2, characterized in that: The first limiting ring (63) is made of insulating material. The bottom wall of the first limiting ring (63) is provided with two first conductive pillars (67). The first driving mechanism (32) is provided with a power source. The two first conductive pillars (67) are electrically connected to the positive and negative poles of the power source respectively. When the annular metal part is attracted by the first magnet (66) and fits against the bottom wall of the first limiting ring (63), the end faces of the two first conductive pillars (67) are both fitted against the end faces of the annular metal part and the circuit is connected.

4. An automated assembly table for a piston subassembly component according to claim 3, characterized in that: The bottom wall of the first limiting ring (63) is provided with at least one second conductive post (68). The second conductive post (68) and the first conductive post (67) are evenly spaced around the axis of the first guide block (65). The second conductive post (68) is electrically connected to the positive terminal of the power supply. When the annular metal part is attracted by the first magnet (66) and fits against the bottom wall of the first limiting ring (63), the end face of the second conductive post (68) fits against the end face of the annular metal part.

5. An automated assembly table for a piston subassembly component according to claim 4, characterized in that: The bottom wall of the first limiting ring (63) is provided with a plurality of mounting holes (631). The mounting holes (631) are used to install the first conductive post (67) and the second conductive post (68). The side wall of the first limiting ring (63) is threaded with a plurality of clamping bolts (632). The clamping bolts (632) are made of conductive material. The clamping bolts (632) correspond one-to-one with the mounting holes (631). One end of the clamping bolt (632) passes through the hole wall of the mounting hole (631) and abuts against the first conductive post (67) or the second conductive post (68). The end of the clamping bolt (632) is threaded with a fixing nut (633). The fixing nut (633) is used to fix the end of the wire.

6. An automated assembly table for a piston subassembly component according to claim 1, characterized in that: The second assembly device (4) includes a vibratory feeder (41) on the workbench (1), a second drive mechanism (42) on the workbench (1), and a second material take-up head (8). The second material take-up head (8) includes a vertical second sleeve (81) and a second slider (82) slidably installed inside the second sleeve (81). The upper end of the second sleeve (81) is closed, and the lower end of the second sleeve (81) is open. A second limiting ring (83) is coaxially provided in the lower end of the second sleeve (81). A second mounting block (84) is provided on the bottom wall of the second slider (82). The lower end of the second mounting block (84) slides through the second limiting ring (83). The second mounting block (84) is provided with an elastic element (7), which is used to push the second slider (82) against the second limiting ring (83). The lower end of the second mounting block (84) is provided with a guide part (9), which includes a second guide block (91) integrally provided at the lower end of the second mounting block (84). The lower end of the second guide block (91) is frustoconical to guide the annular seal to slide and be fitted onto the lower end of the second mounting block (84). The outer diameter of the second mounting block (84) is interference-fitted with the inner diameter of the annular seal. The second drive mechanism (42) is used to drive the second material take-up head (8) to take material in the above manner and then drive the second material take-up head (8) to fit the annular seal onto the end of the screw (101).

7. An automated assembly table for a piston subassembly component according to claim 6, characterized in that: The second guide block (91) and the second limiting ring (83) are in clearance fit, and the second slider (82) and the second sleeve (81) are in clearance fit to allow air to pass through. The second sleeve (81) has an air inlet (811) on its side wall between its bottom and the second slider (82) in the state of pressing against the second limiting ring (83). The air inlet (811) is equipped with an air pipe connector (86), which is connected to a vacuum pump. When the second mounting block (84) removes the annular seal, the annular seal fits against the bottom wall of the second limiting ring (83).

8. An automated assembly table for a piston subassembly component according to claim 7, characterized in that: The second limiting ring (83) has a coaxial mounting groove (812) on its inner wall. A U-shaped sealing ring (813) is provided in the mounting groove (812). The two sides of the larger diameter part of the U-shaped sealing ring (813) abut against the bottom of the mounting groove (812) and the side wall of the second mounting block (84), respectively.

9. An automated assembly table for a piston subassembly component according to claim 7, characterized in that: The guide part (9) includes a cylindrical second guide block (91), which can be sleeved on the end of the screw (101). The end of the second guide block (91) is chamfered to guide the annular seal to be tensioned and sleeved on the second guide block (91) and the second mounting block (84). The side wall of the second guide block (91) is flush with the side wall of the second mounting block (84).

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