Semi-automatic piston ring assembly apparatus

Abstract

The utility model relates to a kind of semi-automatic piston ring assembly equipment, including workbench, one-way gas ring storehouse, two-way gas ring storehouse, oil ring storehouse, ring expanding mechanism, lifting mechanism, center clamp, the gas ring of one-way gas ring storehouse or two-way gas ring storehouse is pushed into the gas ring ring mechanism of ring mechanism of center clamp and the oil ring of oil ring storehouse is pushed into the oil ring ring mechanism of ring mechanism of center clamp;The one-way gas ring storehouse, two-way gas ring storehouse and oil ring storehouse are equilateral triangle distribution along workbench;Center clamp is located in one-way gas ring storehouse, two-way gas ring storehouse and oil ring storehouse middle;The utility model uses above-mentioned structure, can realize one time simultaneously installing 1 oil ring and 2 gas rings on piston.One-way gas ring storehouse, two-way gas ring storehouse and oil ring storehouse are equilateral triangle distribution along workbench, oil ring ring mechanism, one-way gas ring ring mechanism, two-way gas ring ring mechanism form 120 ° included angle installation, guarantee the oil ring, one-way gas ring and two-way gas ring between after installation form 120 ° included angle.

Description

Technical Field

[0001] This utility model relates to a semi-automatic piston ring assembly device. Background Technology

[0002] Pistons in typical gasoline and diesel engines use two compression rings and one oil ring. The compression rings adhere tightly to the cylinder wall due to their elasticity, and the openings of the two compression rings and the oil ring are staggered during assembly, thus providing better sealing and maintaining the airtightness of the cylinder above the piston. The oil ring relies on a spring to hold the oil scraper tightly against the cylinder wall. When installing piston rings, the first compression ring, the second compression ring, and the oil ring are installed, with the ends of the three piston rings staggered by 120°.

[0003] To achieve automatic assembly of piston rings, Chinese Patent No. 202322781585.2 discloses a piston ring hopper structure, including a base plate for supporting piston rings, a first column for limiting piston ring position, a second column for guiding and positioning piston rings, and a pusher for pushing out the bottommost piston ring in the hopper. The first and second columns are fixed to the base plate, and the pusher is set on the base plate and connected to the base plate through a return spring. It can be used as a hopper for first and second compression rings in piston ring assembly. Chinese Patent No. 202322781587.1 discloses a piston ring pusher structure, including two sets of pusher mechanisms. The first set of pusher mechanisms includes a drive cylinder, a linear guide rail, and a push rod driven by the drive cylinder. The push rod is mounted on the slider of the linear guide rail and faces the piston ring at the bottom of the piston ring hopper. The second set of pusher mechanisms includes a servo motor, a linear guide rail, and a push rod driven by the servo motor. The push rod is mounted on the slider of the linear guide rail and faces the piston ring pushed out by the push rod. It can be used as a pusher mechanism for one-stage and two-stage piston rings.

[0004] However, the above technical solutions still have difficulty in simultaneously installing one oil ring and two gas rings on the piston. The oil ring specifically referred to in this utility model is a combined oil ring, that is, a combination of a spring and an oil scraper. Summary of the Invention

[0005] This invention provides a semi-automatic piston ring assembly device, which can simultaneously install one oil ring and two compression rings on a piston.

[0006] The technical solution provided by this utility model is: A semi-automatic piston ring assembly device includes a worktable, a primary piston ring hopper, a secondary piston ring hopper, an oil ring hopper, a ring expanding mechanism, a lifting mechanism, a central clamp, a piston ring pushing mechanism for pushing piston rings from the primary or secondary piston ring hopper into the central clamp, and an oil ring pushing mechanism for pushing oil rings from the oil ring hopper into the central clamp; the primary, secondary, and oil ring hoppers are arranged in an equilateral triangle along the worktable; the central clamp is located in the middle of the primary, secondary, and oil ring hoppers. The central fixture includes a piston bore, a first gas ring guide groove, a second gas ring guide groove, an oil ring guide groove, an opening claw, a transmitter rod, and a fixture base plate. The central fixture is mounted on the workbench base plate. A piston support with a vertical groove is provided inside the piston bore. The transmitter rod is supported by a spring and mounted in the vertical groove of the piston support. The gas ring guide groove and the oil ring guide groove are respectively connected to the fixture base plate via horizontal linear guides. The horizontal linear guides are radially arranged on the fixture base plate. The gas ring guide groove and the oil ring guide groove are slidably connected to the horizontal linear guides via sliders. The gas ring guide groove and the oil ring guide groove are respectively connected to the fixture base plate via compression springs. Vertical linear guides are provided on both the gas ring guide groove and the oil ring guide groove. The opening claw is located between the piston support and the inner wall of the piston bore and is slidably connected to the vertical linear guides via sliders.

[0007] The expanding ring mechanism and the lifting mechanism are located below the central clamp and are concentric with the central clamp. The expanding ring mechanism is connected to the opening claw and drives the opening claw to move radially. The lifting mechanism is connected to the opening claw and drives the opening claw to move vertically.

[0008] The ring expansion mechanism and lifting mechanism include a guide shaft, a linear bearing, a servo motor, a ball screw nut pair, a screw bearing seat, a coupling, a connecting block, a guide rod, a linear bearing, a connecting rod, a drive claw, and support plates one, two, and three arranged from bottom to top. Support plate two is connected to the bottom of the workbench base plate via a guide shaft, the guide shaft is connected to support plate three via a linear bearing, the servo motor is connected to the bottom surface of support plate one, the ball screw is mounted on support plate one via a screw bearing seat, and the coupling connects the servo motor and the ball screw. Support plate one is connected to support plate three through connecting block and guide rod. The flange installed on the nut of ball screw is connected to guide rod through linear bearing and hinged to connecting rod. Support plate three is provided with radial linear guide rail. Connecting rod is hinged to slider installed on radial linear guide rail. A cylinder is mounted on the bottom surface of a support plate, and the piston rod of the cylinder is movably connected to the support plate. Cylinder 2 is mounted on support plate 3, and the piston rod of cylinder 2 is connected to the drive claw. The drive claw is movably connected to the opening claw: the fixed claw is mounted on the slider, and when the piston of cylinder 2 retracts, the drive claw clamps the opening claw onto the fixed claw.

[0009] The fixture base plate is provided with three clamping slots, which are arranged along the circumference of the fixture base plate. Three clamping cylinders are provided on the worktable. Cylinder 2 is installed on support plate 3. The piston rod of cylinder 2 is connected to the drive claw. V-blocks connected to the piston rods of the three clamping cylinders are inserted into the three clamping slots respectively.

[0010] The workbench is equipped with three pairs of hopper clamping cylinders. The first air ring hopper, the second air ring hopper, and the oil ring hopper are clamped and fixed to the workbench by the hopper clamping cylinders. When the clamping cylinders retract, the piston ring hoppers can be removed or replaced.

[0011] The oil ring hopper is clamped and fixed by a hopper clamping cylinder installed on the workbench. The oil ring pushing mechanism is located on one side of the oil ring hopper. The oil ring pushing mechanism includes a linear guide rail fixed on the workbench base plate, an oil ring push rod slidably connected to the linear guide rail, a servo motor fixedly connected to the linear guide rail, and a synchronous belt driven by the servo motor. The oil ring push rod is fixedly connected to the synchronous belt through a connecting rod.

[0012] This invention, employing the aforementioned structure, allows for the simultaneous installation of one oil ring and two compression rings on a piston. The primary compression ring hopper, secondary compression ring hopper, and oil ring hopper are arranged in an equilateral triangle along the worktable. The oil ring pushing mechanism, the primary compression ring pushing mechanism, and the secondary compression ring pushing mechanism are installed at a 120° angle, ensuring that the installed oil ring, primary compression ring, and secondary compression ring form a 120° angle between them. Furthermore, the hoppers and central clamp are designed as movable clamping structures, allowing for changeover production by replacing the three hoppers and the central clamp. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the external appearance of the device according to this utility model.

[0014] Figure 2 for Figure 1 A schematic diagram of the structure after removing the workbench and panel.

[0015] Figure 3 for Figure 2 Bottom side view.

[0016] Figure 4 This is a schematic diagram of the gas ring pusher mechanism of this utility model.

[0017] Figure 5 This is a three-dimensional structural diagram of the oil ring hopper and push ring mechanism of this utility model.

[0018] Figure 6 This is a cross-sectional view of the oil ring hopper and the push ring mechanism.

[0019] Figure 7 This is a schematic diagram showing the connection relationship between the oil ring and the push rod.

[0020] Figure 8 This is a three-dimensional structural diagram of the central clamp of this utility model.

[0021] Figure 9 This is a sectional view of the central fixture.

[0022] Figure 10 This is a bottom side view of the center fixture.

[0023] Figure 11 This is a schematic diagram of the expansion ring mechanism and lifting mechanism of this utility model.

[0024] Figure 12 This is a schematic diagram showing the connection relationship between the expansion ring mechanism and the lifting mechanism of this utility model and the central clamp.

[0025] Figure 13 This is a schematic diagram showing the piston ring of this utility model being pushed into the guide groove. Detailed Implementation

[0026] See Figures 1 to 13 This utility model includes a workbench 1, a panel 2, a primary air ring hopper 3, a secondary air ring hopper 4, an oil ring hopper 5, a ring expanding mechanism, a lifting mechanism, a central clamp 6, a primary air ring pushing mechanism 8 for pushing the air rings in the primary air ring hopper into the central clamp, a secondary air ring pushing mechanism 7 for pushing the air rings in the secondary air ring hopper into the central clamp, and an oil ring pushing mechanism 9 for pushing the oil ring hopper into the central clamp. The primary air ring hopper 3, the secondary air ring hopper 4, and the oil ring hopper 5 are arranged in an equilateral triangle along the workbench panel 2 and are all clamped and fixed by hopper clamping cylinders set on the workbench. The central clamp 6 is located in the middle of the primary air ring hopper 3, the secondary air ring hopper 4, and the oil ring hopper 5.

[0027] The first gas ring hopper 3 and the second gas ring hopper 4 can refer to the structure disclosed in the patent "A Piston Ring Hopper Structure" (Chinese Patent No. 202322781585.2), and the first gas ring pusher mechanism 8 and the second gas ring pusher mechanism 7 can refer to the structure disclosed in the patent "A Piston Ring Pusher Structure" (Chinese Patent No. 202322781587.1).

[0028] like Figure 4 As shown, the gas ring push rod 12 is pushed at the opening position of the gas ring 13, and the boss 14 on the push rod 12 is used to restrict the gas ring to prevent the gas ring 13 from rotating during the pushing process, which would affect the angle at which the gas ring 13 is mounted on the piston.

[0029] like Figure 5-7As shown, the oil ring hopper 5 is fixed to the support base 21 by a hopper clamping cylinder 15 mounted on the worktable. The oil ring pushing mechanism 9 located on one side of the oil ring hopper 5 includes a linear guide rail 17 fixed on the worktable 11, an oil ring push rod 18 slidably connected to the linear guide rail 17, a servo motor 16 fixedly connected to the linear guide rail 17, and a synchronous belt 19 driven by the servo motor 16. The driving pulley on the shaft of the servo motor 16, the synchronous belt 19, and the driven pulley 22 form a complete drive unit. The oil ring push rod 18 is fixedly connected to the synchronous belt 19 through a connecting rod 20. The oil ring push rod 18 pushes the opening position of the oil ring 23. The boss 24 on the push rod 18 prevents the oil ring 23 from rotating during the pushing process, thus affecting the angle at which the oil ring 23 is mounted on the piston.

[0030] like Figure 8-10 As shown, the central clamp 6 is mounted on the workbench base plate 11, supported by two support blocks 39 and two positioning blocks 40, and positioned by two positioning holes on the two positioning blocks 40.

[0031] The center clamp 6 includes a protective cover 27, a piston hole for placing the piston 25, a first gas ring guide groove 28, a second gas ring guide groove 29, an oil ring guide groove 30, an opening claw 31, a trigger rod 33, a clamp base plate 35, and two handles. The center clamp 6 is mounted on the workbench base plate 11. A piston support 32 with a vertical groove is provided inside the piston hole. The piston support 32 is used to limit the height of the piston 25, ensuring that the groove on the piston 25 aligns with the piston rings. The two handles 26 are fixedly mounted on the clamp base plate 35, allowing the operator to easily change the center clamp using the handles 26.

[0032] The transmitter rod 33 is installed in the vertical groove of the piston support 32 and is supported by a spring. When the piston 25 descends, it presses the transmitter rod 33 downward. The descent of the transmitter rod 33 triggers the switch at the bottom of the device. The expanding ring mechanism 10 drives the opening claw 31 to descend, and the piston ring falls into the groove of the piston 25 under its own elastic force.

[0033] The gas ring guide grooves 28 and 29 and the oil ring guide groove 30 are mounted on sliders of radially arranged double-row linear guides 36 and are driven to move radially by the expanding ring mechanism 10. The gas ring guide groove 29 and the oil ring guide groove 30 are respectively connected to the fixture base plate 35 via their respective double-row horizontal linear guides 36, which are radially arranged on the fixture base plate 35. The gas ring guide grooves 28 and 29 and the oil ring guide groove 30 are slidably connected to the horizontal linear guides 36 via sliders. The gas ring guide grooves and oil ring guide grooves are respectively connected to the fixture base plate 35 via compression springs 38 and are driven to move radially by the expanding ring mechanism 10. Vertical linear guides 37 are provided on both the gas ring guide groove and the oil ring guide groove. The opening claw 31 is positioned between the piston support 32 and the inner wall of the piston bore and is slidably connected to the vertical linear guides 37 via sliders. Linear guide rails 37 are vertically mounted on the gas ring guide grooves 28 and 29 and the oil ring guide groove 30, and the opening claw 31 is mounted on the slider of the linear guide rail 37. The ring expanding mechanism 10 can drive the opening claw 31 to move up and down. When the opening claw 31 descends, the piston ring in the guide groove will fall into the groove of the piston 25 due to its own elasticity. The guide grooves 28, 29, and 30 are pressed together by springs 38. When the ring expanding mechanism 10 releases the opening claw 31, the guide grooves move towards the center under the action of the springs 38.

[0034] The expanding ring mechanism and the lifting mechanism 10 are located below the central clamp 6 and are concentric with the central clamp. The expanding ring mechanism is connected to the opening claw 31 and drives the opening claw 31 to move radially. The lifting mechanism is connected to the opening claw 31 and drives the opening claw 31 to move vertically.

[0035] The expanding ring mechanism and lifting mechanism 10 include a guide shaft 45, a linear bearing 46, a servo motor 57, a ball screw nut assembly 52, a screw bearing seat, a coupling 58, a connecting block 47, a guide rod 48, a linear bearing 49, a connecting rod 51, a drive claw 56, and support plates 42, 43, and 44 arranged from bottom to top. Support plate 43 is connected to the bottom of the workbench base plate 11 by four guide shafts 45. The guide shafts 45 are connected to support plate 44 by linear bearings 46. The servo motor 57 is connected to the bottom surface of support plate 42. The screw bearing seat of the ball screw 52 is installed on support plate 42. The coupling 58 connects the servo motor 57 and the ball screw 52.

[0036] Support plate 1 42 is connected to support plate 3 44 via two connecting blocks 47 and two guide rods 48. Flange 50, mounted on the nut of ball screw 52, ​​is connected to guide rods 48 via two linear bearings 49 and hinged to four connecting rods 51. Two cylinders 1 41 are mounted on the bottom surface of support plate 1 42. The piston rods of cylinders 1 41 are movably connected to support plate 2 43, which is fixedly connected to the workbench base plate 11 via four guide rods 45. When cylinders 1 41 extend, they drive support plate 1 42 and support plate 3 44 to descend. Cylinder 2 55 is mounted on support plate 3. The piston rod of cylinder 2 55 is drively connected to drive claw 56, which is movably connected to opening claw 31. Cylinder 2 55 drives drive claw 56 to extend or retract, and cylinder 1 41 drives opening claw 31 to rise and fall. The support plate 44 is equipped with a radial linear guide rail 53. The connecting rod 51 is hinged to the slider 54 mounted on the linear guide rail 53. The cylinder 55 is fixedly connected to the slider 54, and the fixed claw 59 is fixedly connected to the slider 54. The linear guide rail 53 is evenly distributed around the support plate 44. The driving claw 56, which is movably connected to the slider 54, is connected to the piston rod of the cylinder 55. When the cylinder 55 retracts, it drives the driving claw 56 to move outward, thereby clamping the opening claw 31 on the central clamp 6 onto the fixed claw 59. When the servo motor 57 drives the ball screw 52 to rotate, the flange 50 moves up and down, driving the slider 54 to move radially through the connecting rod 51. Since the opening claw 31 is clamped onto the fixed claw 59 by the driving claw 56, it causes the opening claw 31 to expand or contract. When the piston of the cylinder 41 on the expanding ring mechanism 10 extends, the support plate 44 descends, causing the opening claw 31 to descend as well.

[0037] The fixture base plate 35 is equipped with three clamping slots 34, which are arranged along the circumference of the fixture base plate 35. The worktable 1 is equipped with three clamping cylinders. The V-blocks connected to the piston rods of the three clamping cylinders are inserted into the three clamping slots respectively, and the cylinders are used to clamp them to prevent the central fixture 6 from loosening during use.

[0038] The working process of this utility model is as follows: The ring tensioning mechanism 10 descends, driving the opening claw 31 to also descend. The opening claw 31 clears the grooves of the three piston rings. The servo motor 57 of the ring tensioning mechanism 10 actuates, driving the opening claw 31 to move towards the center to a suitable position. The opening claw 31 drives the guide grooves (28, 29, 30) to move towards the center simultaneously. At this time, the central hole formed by the three guide grooves will be smaller than the piston diameter. Then, the three ring pushing mechanisms almost simultaneously push the air ring or oil ring in the hopper into the grooves (63, 62, 61) of the air ring guide grooves 28 and 29 and the oil ring guide groove 30 of the central clamp, as shown. Figure 13As shown, from bottom to top, there are three guide grooves: a first air ring guide groove 63, a second air ring guide groove 62, and an oil ring guide groove 61. The three guide grooves form a 120° angle with the oil ring pusher mechanism, the first air ring pusher mechanism, and the second air ring pusher mechanism on the horizontal projection plane. The three push rods push the three piston rings to a position concentric with the center of the fixture. The three piston rings are located in the three layers of guide grooves. After the push rods retract, the four opening claws 31 rise and block the piston rings. When the ring expansion mechanism drives the opening claws 31 to move outward, the opening claws 31 will open the three piston rings simultaneously in the guide grooves. When they are opened to a certain size (until the piston rings are larger than the piston diameter), the piston 25 is placed in and the bottom switch is triggered. The ring expansion mechanism 10 drives the opening claws 31 to descend, and the three piston rings fall into the three grooves of the piston 25 at the same time.

Claims

1. A semi-automatic piston ring assembly device, comprising a worktable, a primary piston ring hopper, a secondary piston ring hopper, an oil ring hopper, a ring expanding mechanism, a lifting mechanism, a central fixture, a piston ring pushing mechanism for pushing piston rings from the primary and secondary piston ring hoppers into the central fixture, and an oil ring pushing mechanism for pushing oil rings from the oil ring hopper into the central fixture; characterized in that: The first air ring hopper, the second air ring hopper, and the oil ring hopper are arranged in an equilateral triangle along the worktable; the central clamp is located in the middle of the first air ring hopper, the second air ring hopper, and the oil ring hopper; The central fixture includes a piston bore, a first gas ring guide groove, a second gas ring guide groove, an oil ring guide groove, an opening claw, a transmitter rod, and a fixture base plate. The central fixture is mounted on the worktable base plate. A piston support with a vertical groove is provided inside the piston bore. The transmitter rod is spring-supported and mounted in the vertical groove of the piston support. The gas ring guide groove and the oil ring guide groove are connected to the fixture base plate via horizontal linear guides, which are radially arranged on the fixture base plate. The gas ring guide groove and the oil ring guide groove are slidably connected to the horizontal linear guides via sliders. The gas ring guide groove and the oil ring guide groove are also connected to the worktable base plate via compression springs. Vertical linear guides are provided on both the gas ring guide groove and the oil ring guide groove. The opening claw is positioned between the piston support and the inner wall of the piston bore and is slidably connected to the vertical linear guides via sliders. The expanding ring mechanism and the lifting mechanism are located below the central clamp and are concentric with the central clamp. The expanding ring mechanism is connected to the opening claw and drives the opening claw to move radially. The lifting mechanism is connected to the opening claw and drives the opening claw to move vertically.

2. The semi-automatic piston ring assembly equipment according to claim 1, characterized in that: The ring expansion mechanism and lifting mechanism include a guide shaft, linear bearing, servo motor, ball screw nut pair, screw bearing housing, coupling, connecting block, guide rod, connecting rod, drive claw, and support plates 1, 2, and 3 arranged from bottom to top. Support plate 2 is connected to the bottom of the worktable base plate through a guide shaft, and the guide shaft is connected to support plate 3 through a linear bearing. The servo motor is connected to the bottom surface of support plate 1, and the ball screw is mounted on support plate 1 through a screw bearing housing. The coupling connects the servo motor and the ball screw. Support plate one is connected to support plate three through connecting block and guide rod. The flange installed on the nut of ball screw is connected to guide rod through linear bearing and hinged to connecting rod. Support plate three is provided with radial linear guide rail. Connecting rod is hinged to slider installed on radial linear guide rail. A cylinder is mounted on the bottom surface of a support plate, and the piston rod of the cylinder is movably connected to the support plate. Cylinder 2 is mounted on support plate 3. The piston rod of cylinder 2 is connected to the drive claw, and the drive claw is movably connected to the opening claw.

3. The semi-automatic piston ring assembly equipment according to claim 1 or 2, characterized in that: The center fixture base plate is provided with three clamping slots, which are arranged along the circumference of the fixture base plate. There are three fixture clamping cylinders on the worktable, and V-blocks connected to the piston rods of the three fixture clamping cylinders are inserted into the three clamping slots respectively.

4. The semi-automatic piston ring assembly equipment according to claim 1 or 2, characterized in that: The workbench is equipped with three pairs of hopper clamping cylinders. The first air ring hopper, the second air ring hopper, and the oil ring hopper are clamped and fixed to the workbench by the hopper clamping cylinders.

5. The semi-automatic piston ring assembly equipment according to claim 4, characterized in that: The oil ring push mechanism is located on one side of the oil ring hopper. The oil ring push mechanism includes a linear guide rail fixed on the worktable base plate, an oil ring push rod slidably connected to the linear guide rail, a servo motor fixedly connected to the linear guide rail, and a synchronous belt driven by the servo motor. The oil ring push rod is fixedly connected to the synchronous belt through a connecting rod.

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