A pad printing device for piston ring

Abstract

The present invention discloses a pad printing device for piston rings, including a frame and a pad printing machine, a loading rod, a pushing device, a receiving rod, a dividing device and a feeding device, wherein the loading rod is suspended on a loading rod supporting structure fixed to the frame, the pushing device is used to push the piston ring from one end of the loading rod to the other end; the receiving rod is used to receive the piston ring pushed from the loading rod; the dividing device is used to cut the piston ring on the connecting rod and push the cut piston ring to one end of the receiving rod; the feeding device is used to clamp the cut piston ring on the connecting rod and transfer the clamped piston ring to the bottom of the printing head of the pad printing machine, and transfer and unload the piston ring after pad printing. The present invention automatically completes the pad printing operation by connecting and cooperating with the pushing device, the dividing device and the feeding device.

Description

Technical Field

[0001] The invention belongs to the technical field of piston ring pad printing, and in particular relates to a pad printing device for a piston ring. Background Art

[0002] Currently in the automotive parts manufacturing industry, traditional piston ring color codes are all sprayed manually, which is unable to achieve automatic and accurate spraying of color codes at fixed points in the circumferential direction, and cannot meet high-quality spraying requirements; especially for thin parts with openings like piston rings, it is difficult to spray color codes manually, and the color codes are often sprayed crookedly during the spraying process, resulting in poor quality and low efficiency of piston ring spraying color codes. Summary of the invention

[0003] The purpose of the present invention is to provide a pad printing device for a piston ring to overcome the above technical problems.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A pad printing device for a piston ring, comprising

[0006] Rack and pad printers;

[0007] A loading rod is suspended on a loading rod support structure fixed to the frame;

[0008] A pushing device, fixed to the frame and located at one end of the feeding rod, is used to push the piston ring from one end of the feeding rod to the other end;

[0009] A receiving rod, connected to the other end of the feeding rod, for receiving the piston ring pushed from the feeding rod;

[0010] A material dividing device, fixedly connected to the frame, is used to divide the piston ring on the receiving rod and push the divided piston ring to one end of the receiving rod;

[0011] A feeding device is fixedly connected to the frame, and is used to clamp the piston ring cut on the feed rod, transfer the clamped piston ring to the bottom of the printing head of the pad printing machine, and transfer and unload the piston ring after pad printing;

[0012] The material receiving rod is fixedly connected to the material dividing device.

[0013] Furthermore, the feeding rod support structure includes a support frame fixed to the frame, a support plate 1 transversely connected to one side of the support frame and used to support one end of the feeding rod, a support rod close to the other end of the feeding rod and vertically fixed to the frame, a pair of side plates parallel to the length direction of the feeding rod and fixed to both sides of the support rod, and a support plate 2 fixed between the pair of side plates for supporting the other end of the feeding rod, and one end of the receiving rod is close to the support rod. The support frame is an inverted U-shaped structure, the bottom end of one side of the inverted U-shaped structure is fixed to the frame, and the support plate 1 is transversely fixed to the bottom end of the other side of the inverted U-shaped structure.

[0014] Furthermore, a tightening cylinder is fixedly connected to the other side surface of the support frame, and the movable end of the tightening cylinder passes through the support frame and is connected to a tightening block that cooperates with the support rod to clamp the feeding rod.

[0015] Furthermore, the pushing device includes a pushing electric cylinder fixed to the frame and parallel to the length direction of the feeding rod, a pushing mounting plate fixed to the movable end of the pushing electric cylinder, and a pushing plate fixed to the pushing mounting plate for pushing the piston ring on the feeding rod. The pushing plate adopts a groove structure, and the two sides of the feeding rod are located in the concave groove of the pushing plate.

[0016] Furthermore, the material dividing device includes a material dividing frame fixedly connected to the frame, a material dividing electric cylinder fixedly connected to the material dividing frame and parallel to the length direction of the material receiving rod, a connecting block connected to the movable end of the material dividing electric cylinder, a clamping cylinder fixedly connected to the lower end surface of the connecting block, and two cutting rods respectively connected to the two fingers of the clamping cylinder and vertically arranged, and the material receiving rod is located between the two cutting rods.

[0017] Furthermore, the feeding device comprises:

[0018] A clamping assembly, used to clamp the piston ring cut on the butt rod;

[0019] A lifting assembly, used for causing the clamping assembly to move from an initial position to a clamping position for clamping the piston ring;

[0020] A driving assembly is used to move the clamping assembly and the lifting assembly to drive the piston ring clamped by the clamping assembly to below the printing head of the pad printing machine, and can drive the piston ring that has completed pad printing to move to a discharging position for unloading;

[0021] The rotating assembly is used to rotate the piston ring clamped on the clamping assembly so that the pad printing machine can perform pad printing on different positions of the piston ring;

[0022] The clamping assembly is fixedly connected to the movable end of the lifting assembly, the rotating assembly is connected to the clamping assembly, the lifting assembly is fixedly connected to the movable end of the driving assembly, the driving assembly is fixedly connected to the frame table, and the driving direction of the driving assembly is parallel to the material receiving rod.

[0023] Furthermore, the clamping assembly includes a clamping cylinder connected to the lifting assembly, two vertical connecting blocks fixed to the two movable ends of the clamping cylinder, and two clamping rods respectively connected to the two vertical connecting blocks and opposite to each other, and the rotating assembly is fixed to the vertical connecting blocks and connected to the clamping rods.

[0024] Furthermore, the rotating assembly includes a reducer fixedly connected to one of the vertical connecting blocks, a servo motor connected to the reducer, a synchronous belt structure arranged in the vertical connecting block and connected to the reducer, a driving shaft connected to the synchronous belt structure and arranged horizontally, a bearing arranged in the other vertical connecting block, and a driven shaft movably connected to the bearing, one end of the driving shaft is connected to one of the clamping rods, a section of the driven shaft is connected to the other clamping rod, the two clamping rods both adopt an L-shaped structure, and the bottom edges of the two clamping rods are connected by an inlay manner.

[0025] Furthermore, the lifting assembly is a lifting cylinder fixedly connected to the driving assembly, and the clamping assembly is connected to the movable end of the lifting cylinder.

[0026] Furthermore, the driving assembly includes a driving cylinder 1 fixedly connected to the frame table and parallel to the material receiving rod, a driving cylinder 2 fixedly connected to the movable end of the driving cylinder 1, a connecting plate fixedly connected to the driving cylinder 2 and arranged horizontally, a pair of guide rails fixedly connected to the frame and arranged parallel to both sides of the driving cylinder 1, a pair of sliders fixedly connected to both sides of the bottom surface of the connecting plate and slidably connected to the pair of guide rails, and the lifting assembly is fixedly connected to the connecting plate.

[0027] Beneficial effects:

[0028] The present invention gradually pushes a group of piston rings onto a receiving rod through a pushing device, cuts a part of a group of piston rings through a dividing device, clamps the piston ring of this part through a clamping assembly, moves the clamped piston ring to the bottom of a pad printing machine through a driving assembly, rotates the piston ring along the outer circumference of the piston ring through a rotating assembly so that pad printing can be performed on any position on the outer circumference of the piston ring, and finally transfers the piston ring after pad printing to a discharge rod through a driving assembly, thereby automatically completing the pad printing operation.

[0029] In the present invention, a photoelectric sensor is used to sense a portion of the piston ring that needs to be cut on the docking rod, thereby ensuring fully automated operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 for Figure 1 The structural diagram of the feeding device;

[0032] Figure 3 for Figure 2 Side view of

[0033] Figure 4 for Figure 1 Side view of the middle pusher;

[0034] Figure 5 It is a structural schematic diagram of the feeding rod;

[0035] Figure 6 It is a structural schematic diagram of the material receiving rod;

[0036] Figure 7 is a schematic diagram of the structure of two clamping rods;

[0037] In the figure: 100, frame; 200, pad printing machine; 300, loading rod; 400, loading rod support structure; 410, support frame; 420, pallet 1; 430, support rod; 440, side plate; 450, top cylinder; 460, top block; 500, push device; 510, push electric cylinder; 520, push mounting plate; 530, push plate; 600, receiving rod; 700, dividing device; 710, dividing frame; 720, dividing electric cylinder; 730, connecting block; 740, clamping claw cylinder; 750, cutting rod; 760, photoelectric sensor; 800, Feeding device; 810, clamping assembly; 811, clamping cylinder; 812, vertical connecting block; 813, clamping rod; 813a, clamping rod one; 813b, clamping rod two; 8131, fitting groove; 820, lifting assembly; 830, driving assembly; 831, driving cylinder one; 832, driving cylinder two; 833, connecting plate; 834, guide rail; 835, slider; 840, rotating assembly; 841, reducer; 842, servo motor; 843, synchronous belt structure; 844, driving shaft; 845, bearing; 846, driven shaft; 900, unloading rod. DETAILED DESCRIPTION

[0038] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "front", "rear", etc. indicating directions or positional relationships are only for describing the present invention and simplifying the description, and do not indicate or imply that the device or structure referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] like Figure 1 As shown, a pad printing device for piston rings described in the present invention comprises a frame, a loading rod, a loading rod supporting structure, a pushing device, a receiving rod, a material dividing device, a feeding device, and a pad printing machine, wherein the loading rod supporting structure, the pushing device, the material dividing device, and the feeding device are all fixedly connected to the frame, the pad printing machine is arranged outside the frame, and the printing head of the pad printing machine is located above the feeding device, wherein the loading rod is suspended on the loading rod supporting structure, and the pushing device is arranged at one end of the loading rod, and is used to push the piston ring from one end of the loading rod to the pad printing machine. The piston ring is pushed to the other end, one end of the receiving rod is connected to the other end of the loading rod, and the receiving rod is fixed to the dividing device. The pushing device can push the piston ring at the other end of the loading rod onto the receiving rod; the dividing device is used to cut the piston ring on the connecting rod and push the cut part of the piston ring to one end of the receiving rod; the feeding device is used to clamp the cut part of the piston ring on the receiving rod and transfer the clamped piston ring to the bottom of the printing head of the pad printing machine, and at the same time transfer the piston ring that has completed the pad printing process for unloading.

[0040] like Figure 5 As shown, the cross section of the feeding rod is an inverted V-shape, and the opening of the piston ring is hung on both sides of the feeding rod. Figure 6 As shown, the cross section of the material receiving rod is an inverted Y shape, the opening of the piston ring can be hung on the two side edges of the material receiving rod, and a bolt hole is provided on the vertical side of the material receiving rod and close to one end of the feeding rod to fix the material receiving rod on the material distributing device, so as not to affect the material distributing of the piston ring; Figure 1As shown, the loading rod supporting structure includes a supporting frame and a supporting rod vertically fixed on the frame and spaced a distance from each other, the loading rod is located between the supporting frame and the supporting rod, and a support plate 1 for supporting one end of the loading rod is horizontally connected to a side surface of the supporting frame relative to the loading rod, and the other end of the loading rod is close to the side of the supporting rod, and a pair of side plates are fixed on both sides of the support rod and parallel to the length direction of the loading rod, and a support plate 2 (not visible in the figure) connected to the side of the support rod is fixed between the pair of side plates, and the support plate 2 supports the end of the loading rod close to the support rod, and one end of the receiving rod is close to the support rod; wherein, the supporting frame preferably adopts an inverted U-shaped structure, and the length of one side side of the inverted U-shaped structure is greater than the length of the other side side, the side with longer length is fixed to the frame, and the support plate 1 is connected to the side with shorter length in the inverted U-shaped structure.

[0041] like Figure 1 As shown, the feeding rod is directly suspended on the first and second pallets. When the feeding rod is close to one side of the support rod, a tightening assembly is connected to the support frame, which can apply a force to one end of the feeding rod close to the support frame, so that the feeding rod is fixed between the tightening assembly and the support rod. The tightening assembly includes a tightening cylinder connected to one side of the support frame, and the movable end of the tightening cylinder passes through the support frame from one side of the support frame and is arranged in the direction of the feeding rod. A tightening block is connected to the movable end of the tightening cylinder, and the feeding rod is fixed between the tightening block and the support rod through the action of the tightening block.

[0042] like Figure 1 and Figure 4 As shown, the pushing device includes a pushing electric cylinder fixed to the frame and parallel to the length direction of the feeding rod, a pushing mounting plate fixed to the active end of the pushing electric cylinder, and a pushing plate fixed to the pushing mounting plate for pushing the piston ring on the feeding rod, wherein the pushing mounting plate includes a vertical plate vertically fixed to the active end of the pushing electric cylinder, and an extension rod integrally formed with the vertical plate and laterally arranged, the pushing plate is fixed to one end of the extension rod, wherein the pushing plate adopts a groove type structure, and the two side edges of the feeding rod are respectively located in the concave grooves of the pushing plate, thereby the pushing plate can be moved back and forth along the length direction of the feeding rod by the pushing electric cylinder, and when a piston ring is hung on the feeding rod, the pushing plate can make the piston ring move toward the receiving rod along the length direction of the feeding rod.

[0043] like Figure 1As shown, a photoelectric sensor 760 is provided on the frame at one end of the pushing electric cylinder and at one side of the receiving rod. The photoelectric sensor senses whether there is a piston ring at a preset position on the receiving rod. When the pushing plate pushes the piston ring onto the receiving rod, when the photoelectric sensor senses the piston ring at the preset position of the receiving rod, the pushing cylinder stops.

[0044] like Figure 1 As shown, the material dividing device includes a material dividing frame fixedly connected to the frame, a material dividing electric cylinder is connected to the material dividing frame above the material receiving rod and parallel to the length direction of the material receiving rod, a connecting block is connected to the movable end of the material dividing electric cylinder, a clamping cylinder is fixedly connected to the lower end surface of the connecting block, the moving direction of the movable end of the clamping cylinder is perpendicular to the length direction of the material receiving rod, and two vertically arranged cutting rods are respectively fixedly connected to the two fingers of the clamping cylinder, the material receiving rod is located between the two cutting rods, and the clamping cylinder can move the two cutting rods toward the material receiving rod so that the piston ring on the material receiving rod is cut into two parts, and then under the action of the material dividing electric cylinder, the cutting rod moves along the length direction of the material receiving rod, thereby prompting a part of the cut piston ring to continue to move along the material receiving rod toward the feeding device until the cut part of the piston ring is pushed to the top of the feeding device. During use, when the photoelectric sensor senses the piston ring and the pushing cylinder stops, the clamping cylinder can be started to cut the piston ring.

[0045] like Figure 1-Figure 3 As shown, the feeding device includes a clamping assembly, a rotating assembly, a lifting assembly and a driving assembly, wherein the clamping assembly is used to clamp a part of the piston ring that has been cut on the docking rod, the lifting assembly is used to prompt the clamping assembly to move from an initial position to a clamping position for clamping the piston ring, the driving assembly is used to move the clamping assembly and the lifting assembly to drive the piston ring clamped by the clamping assembly to under the printing head of the pad printing machine, and can drive the piston ring that has completed pad printing to the unloading position for unloading; the rotating assembly is used to rotate the piston ring clamped on the clamping assembly so that the pad printing machine can pad print different positions of the piston ring.

[0046] Among them, the clamping assembly is fixed to the movable end of the lifting assembly, the rotating assembly is connected to the clamping assembly, the lifting assembly is fixed to the movable end of the driving assembly, the driving assembly is fixed to the frame table, and the driving direction of the driving assembly is parallel to the material receiving rod.

[0047] like Figure 2As shown, the clamping assembly includes a clamping cylinder, and a vertical connecting block is connected to each of the two movable ends of the clamping cylinder. A clamping rod is connected to the inner side of each vertical connecting block. The clamping rods connected to the two vertical connecting blocks are opposite to each other, so that the clamping rods move relative to each other through the relative movement of the two movable ends of the clamping cylinder, thereby clamping the piston ring; wherein, as Figure 7 As shown, the two clamping rods both adopt an L-shaped structure, and the bottom rods of the two clamping rods are connected by an inlay manner, one of the clamping rods is set as clamping rod one 813a, and the other is set as clamping rod two 813b; the bottom edge of the bottom rod of the clamping rod one 813a is provided with an inlay groove 8131 arranged along the length direction of the bottom rod, and the size of the bottom rod of the clamping rod two 813b is preferably slightly smaller than or equal to the size of the inlay groove, so that during the clamping process, the bottom rod of the clamping rod two can be inserted into the inlay groove along the length direction of the inlay groove, and can move back and forth under the action of the clamping cylinder.

[0048] At the same time, a plastic pad is fixedly connected to the mutually opposite surfaces of the two clamping rods to protect the piston ring from being damaged.

[0049] like Figure 2 and Figure 3 As shown, the lifting assembly is a lifting cylinder fixedly connected to the driving assembly, and the clamping cylinder is fixedly connected to the movable end of the lifting cylinder through a vertically arranged connecting plate, so that the driving of the lifting cylinder can make the clamping cylinder move back and forth in the vertical direction, and then make the clamping rod move back and forth in the vertical direction. When the dividing device pushes the cut piston ring to the top of the clamping assembly, the lifting cylinder is started, and the clamping rod moves upward to the two sides of the piston ring. The clamping cylinder is started, so that the two clamping rods move toward the piston ring respectively to complete the clamping of the piston ring.

[0050] like Figure 2 and Figure 3 As shown, a further technical solution of the present invention is that when the present invention is provided with the rotating component, the rotating component includes a reducer fixedly connected to the outer side of one of the vertical connecting blocks, and a servo motor connected to the reducer, wherein the vertical connecting block connected to the reducer has a cavity structure, in which a synchronous belt structure connected to the reducer is provided, the synchronous belt structure includes a driving wheel located at the lower end of the vertical connecting block and connected to the reducer, a synchronous belt connected to the driving wheel, and a driven wheel located at the upper end of the vertical connecting block and connected to the synchronous belt, the driven wheel is connected to a laterally arranged driving shaft, and at this time, one end of the driving shaft is fixedly connected to clamping rod one; at the same time, a cavity structure is also provided in the other vertical connecting block, a bearing is connected in the cavity, and a driven shaft extending outside the vertical connecting block is movably connected in the bearing, and at this time, one end of the driven shaft is fixedly connected to clamping rod two.

[0051] Therefore, through the above structure, when the clamping assembly clamps the piston ring, the bottom rod of the clamping rod 2 is inserted into the engaging groove of the clamping rod 1 to realize the clamping function, and then under the action of the driving assembly, the clamping assembly drives the clamped piston ring to move to the bottom of the printing head of the pad printing machine, and the printing head of the pad printing machine moves down to perform pad printing on a part of the outer circumference of the piston ring. After completion, the servo motor starts, prompting the active shaft to drive the clamping rod 1 connected to it to rotate. At this time, the two clamping rods are synchronously driven with the clamping rod 2 of the driven shaft due to the engaging relationship, thereby realizing the rotation of the two clamping rods and driving the piston ring. After setting the rotation angle, the pad printing machine can perform pad printing on other parts of the outer circumference of the piston ring.

[0052] like Figure 2 and Figure 3 As shown, the driving assembly includes a driving cylinder 1 fixedly connected to the frame table, and a driving cylinder 2 is connected to the movable end of the driving cylinder 1 through a connecting block. The moving directions of the driving cylinder 1 and the driving cylinder 2 are consistent with the length direction of the material receiving rod. A connecting plate arranged laterally is fixedly connected to the driving cylinder 2. A pair of guide rails are fixedly connected to the frame on both sides of the driving cylinder 1, and the guide rails are parallel to the moving direction of the driving cylinder 1. A slider is fixedly connected to both sides of the bottom surface of the connecting plate, and the slider is slidably connected to the slide rail, so that the connecting plate can slide back and forth along the guide rail under the action of the driving cylinder 1 or the driving cylinder 2, wherein the lifting cylinder is fixedly connected to the connecting plate, so that the driving assembly prompts the lifting cylinder to drive the clamping assembly to move back and forth along the guide rail. As shown Figure 2 As shown, a buffer seat 836 for limiting the movement of the driving cylinder 1 and the driving cylinder 2 is also provided on the frame, and the connection position of the buffer seat is set according to the stroke.

[0053] like Figure 1 As shown, a discharge rod 900 is provided on the frame at one end of the driving assembly, and the discharge rod is connected to the frame through a discharge rod support frame. The discharge rod and the receiving rod are on the same horizontal line, and the stroke of the driving cylinder 1 and the driving cylinder 2 are set. When the driving cylinder 1 is started, the clamping assembly can be prompted to move from the clamping position of the clamping assembly to below the printing head of the pad printing machine along the guide rail. After the pad printing is completed, the driving cylinder 2 is started to move the clamping assembly from the pad printing position to the discharge position, so that the piston ring on the clamping assembly is hung on the discharge rod. At this time, the clamping cylinder prompts the two clamping rods to move back and release the piston ring. The lifting cylinder is started to move the clamping assembly downward, and the driving cylinder 1 and the driving cylinder 2 are started to restore the clamping assembly to the initial position, waiting for the next clamping, and this cycle is repeated.

[0054] Usage process: remove the feeding rod from the feeding rod supporting structure, hang a group of piston rings (the number is determined according to the length of the feeding rod) on the feeding rod, hang the feeding rod with the piston ring on the feeding rod supporting structure, fix the feeding rod between the supporting rod and the tightening block by the tightening cylinder, start the pushing cylinder, so that the pushing plate applies force to the piston ring on the feeding rod close to the pushing device side, so that the piston ring on the end of the feeding rod close to the receiving rod is pushed to the receiving rod until the pushing cylinder pushes the piston ring to the position sensed by the photoelectric sensor, the pushing cylinder stops, the clamping cylinder starts, the cutting rod contacts the outer circumference of the piston ring, so that the piston ring between the cutting rod and the position sensed by the photoelectric sensor is separated from other piston rings, the dividing electric cylinder starts, the cutting rod first drives the piston ring to move one end distance along the receiving rod, and then the dividing electric cylinder retracts, the clamping claw cylinder makes the cutting rod move relative to each other again and makes the cutting rod close to the receiving rod, at this time the dividing electric cylinder starts again, The cutting rod contacts the side of the piston ring and applies force to the side of the piston ring to make the piston ring continue to move along the receiving rod until it moves to the top of the clamping assembly, and the clamping claw cylinder and the material dividing electric cylinder stop; the lifting cylinder is started so that the two clamping rods are respectively located on both sides of a part of the piston ring, and the clamping cylinder is started so that the two clamping rods move relative to each other to clamp the piston ring. After completion, the driving cylinder is started to make the clamping rod drive the piston ring to move below the printing head of the pad printing machine, and the printing head of the pad printing machine moves down to spray the color code on the piston ring. After completion here, the clamping rod can also be rotated by starting the rotating assembly to rotate the piston ring, so as to facilitate spraying other positions on the outer circumference of the piston ring. After spraying is completed, the driving cylinder is started to make the clamping rod drive the piston ring to move toward the unloading rod until the piston ring is hung on the unloading rod. The driving cylinder, the driving cylinder, the lifting cylinder, and the clamping cylinder all return to their positions, waiting for the next operation, and this cycle is repeated.

[0055] In order to make the purpose, technical solution and advantages of the present invention more concise and clear, the present invention is illustrated by the above specific embodiments, which are only used to describe the present invention and cannot be understood as limiting the scope of the present invention. It should be pointed out that any modification, equivalent replacement and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A pad printing device for a piston ring, characterized in that: include A frame (100) and a pad printer (200); A loading rod (300) is suspended on a loading rod support structure (400) fixedly connected to the frame; A pushing device (500) is fixedly connected to the frame and located at one end of the loading rod, and is used to push the piston ring from one end of the loading rod to the other end; A receiving rod (600) is connected to the other end of the feeding rod and is used to receive the piston ring pushed from the feeding rod; A material dividing device (700) is fixedly connected to the frame and is used to divide the piston ring on the receiving rod and push the divided piston ring to one end of the receiving rod; A feeding device (800) is fixedly connected to the frame and is used to clamp the piston ring cut on the feed rod, transfer the clamped piston ring to below the printing head of the pad printing machine, and transfer and unload the piston ring after pad printing; The material receiving rod is fixedly connected to the material distributing device; The feeding device comprises: A clamping assembly (810) is used to clamp the piston ring cut on the butt rod; A lifting assembly (820) is used to cause the clamping assembly to move from an initial position to a clamping position for clamping the piston ring; A driving assembly (830) is used to move the clamping assembly and the lifting assembly to drive the piston ring clamped by the clamping assembly to below the printing head of the pad printing machine, and to drive the piston ring that has completed pad printing to move to a discharge position for discharge; A rotating assembly (840) is used to rotate the piston ring clamped on the clamping assembly so that the pad printing machine can perform pad printing on different positions of the piston ring; The clamping assembly is fixedly connected to the movable end of the lifting assembly, the rotating assembly is connected to the clamping assembly, the lifting assembly is fixedly connected to the movable end of the driving assembly, the driving assembly is fixedly connected to the frame table, and the driving direction of the driving assembly is parallel to the material receiving rod; The clamping assembly comprises a clamping cylinder (811) connected to the lifting assembly, two vertical connection blocks (812) fixed to two movable ends of the clamping cylinder, and two clamping rods (813) respectively connected to the two vertical connection blocks and opposite to each other, and the rotating assembly is fixed to the vertical connection blocks and connected to the clamping rods; The rotating assembly comprises a reducer (841) fixedly connected to one of the vertical connection blocks, a servo motor (842) connected to the reducer, a synchronous belt structure (843) arranged in the vertical connection block and connected to the reducer, a driving shaft (844) connected to the synchronous belt structure and arranged transversely, a bearing (845) arranged in the other vertical connection block, and a driven shaft (846) movably connected to the bearing, one end of the driving shaft is connected to one of the clamping rods, a section of the driven shaft is connected to the other clamping rod, the two clamping rods are both L-shaped structures, and the bottom edges of the two clamping rods are connected by an inlay method; The lifting assembly is a lifting cylinder fixedly connected to the driving assembly, and the clamping assembly is connected to the movable end of the lifting cylinder.

2. The pad printing device for piston rings according to claim 1, characterized in that: The feeding rod support structure includes a support frame (410) fixedly connected to the frame, a support plate (420) laterally connected to one side of the support frame and used to support one end of the feeding rod, a support rod (430) close to the other end of the feeding rod and vertically fixed to the frame, a pair of side plates (440) parallel to the length direction of the feeding rod and fixed to both sides of the support rod, and a support plate (2) fixed between the pair of side plates and used to support the other end of the feeding rod, and one end of the receiving rod is close to the support rod.

3. The pad printing device for piston ring according to claim 2, characterized in that: A tightening cylinder (450) is fixedly connected to the other side of the support frame. The movable end of the tightening cylinder passes through the support frame and is connected to a tightening block (460) that cooperates with the support rod to clamp the feeding rod.

4. The pad printing device for piston rings according to claim 1, characterized in that: The pushing device comprises a pushing electric cylinder (510) fixedly connected to the frame and parallel to the length direction of the loading rod, a pushing mounting plate (520) fixedly connected to the movable end of the pushing electric cylinder, and a pushing plate (530) fixedly connected to the pushing mounting plate and used for pushing the piston ring on the loading rod.

5. The pad printing device for piston rings according to claim 1, characterized in that: The material dividing device comprises a material dividing frame (710) fixedly connected to the frame, a material dividing electric cylinder (720) fixedly connected to the material dividing frame and parallel to the length direction of the material receiving rod, a connecting block (730) connected to the movable end of the material dividing electric cylinder, a clamping cylinder (740) fixedly connected to the lower end surface of the connecting block, and two cutting rods (750) respectively connected to two fingers of the clamping cylinder and vertically arranged, and the material receiving rod is located between the two cutting rods.

6. The pad printing device for piston rings according to claim 1, characterized in that: The driving assembly includes a driving cylinder 1 (831) fixedly connected to the frame table and parallel to the material receiving rod, a driving cylinder 2 (832) fixedly connected to the movable end of the driving cylinder 1, a connecting plate (833) fixedly connected to the driving cylinder 2 and arranged horizontally, a pair of guide rails (834) fixedly connected to the frame and arranged parallel to both sides of the driving cylinder 1, and a pair of sliders (835) fixedly connected to both sides of the bottom surface of the connecting plate and slidably connected to the pair of guide rails. The lifting assembly is fixedly connected to the connecting plate.

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