Print head assembly

Abstract

The embodiment of the utility model discloses a printing head assembly which comprises at least one servo motor, a bearing frame, at least one transmission assembly, a support, at least one connecting assembly and at least one brush head piece. The servo motor is connected with the bearing frame, the support is connected with the bearing frame, and the transmission assembly is rotationally connected with the support and supported by the support. The transmission assembly is connected with the connecting assembly and the output end of the servo motor, the servo motor drives the transmission assembly to move, and when the transmission assembly moves, the transmission assembly drives the connecting assembly to move so as to drive the brush head part to move. According to the scheme, the servo motor can accurately control the brush head part to move, and the technical problems that in the prior art, due to the fact that an air cylinder for driving the brush head part to move is low in precision and unstable, the brush head part moving precision is low, and the printing film thickness is uneven are solved.

Description

Technical Field

[0001] This utility model relates to the printing field, and more particularly to a printhead assembly. Background Technology

[0002] The print head is a stationary device that moves during printing, moving along the substrate to be printed. It is one of the core components of a printing press, primarily responsible for transferring images or text onto the printing medium. Currently, the print head is driven by a cylinder. However, the driving force output by the cylinder varies with air pressure, resulting in poor stability. This leads to technical problems such as low printing precision and uneven film thickness. Furthermore, to ensure print quality, the print head's balance must be manually adjusted before each printing session, which is quite cumbersome. Utility Model Content

[0003] In view of this, the present invention provides a printing head assembly to solve the problems of low printing accuracy and the need for manual balancing in the prior art. To achieve one or more of the above objectives or other objectives, the present invention proposes a printing head assembly, including at least one servo motor, a support frame, at least one transmission component, a bracket, at least one connecting component, and at least one brush head component;

[0004] The servo motor is connected to the support frame, the bracket is connected to the support frame, and the transmission component is rotatably connected to the bracket and supported by the bracket;

[0005] The transmission component is connected to the connecting component and the output end of the servo motor respectively. The servo motor drives the transmission component to move. When the transmission component moves, it drives the connecting component to move, thereby driving the brush head component to move.

[0006] Preferably, the brush head is a scraper or a back-ink blade.

[0007] Preferably, the brush head includes a scraper and a back-ink blade; the number of the at least one servo motor is two, namely a first servo motor and a second servo motor; the transmission assembly includes a first transmission assembly and a second transmission assembly; the connection assembly includes a first connection assembly and a second connection assembly.

[0008] The first transmission assembly and the second transmission assembly are respectively connected to the bracket;

[0009] The first transmission component is connected to the first connecting component and the output end of the first servo motor. The first servo motor drives the first transmission component to move. The movement of the first transmission component drives the first connecting component to move, thereby driving the scraper to move.

[0010] The second transmission component is connected to the second connecting component and the output end of the second servo motor. The second servo motor drives the second transmission component to move. The movement of the second transmission component drives the second connecting component to move, thereby driving the ink return blade to move.

[0011] Preferably, the first transmission assembly includes a first ball screw, a first screw bearing, a first belt ring, a first connector, and a first guide rod;

[0012] One end of the first belt loop is fitted onto the output end of the first servo motor, and the other end is fitted onto one end of the first ball screw;

[0013] The first connecting member is connected to the first lead screw bearing and the first guide rod respectively. The first guide rod is movably connected to the first connecting assembly. One end of the first ball screw passes through the first connecting member, passes through the first lead screw bearing, and is rotatably connected to the bracket.

[0014] When the output end of the first servo motor rotates, it drives the first belt ring to drive the first ball screw to rotate. When the first ball screw rotates, the first screw bearing drives the first connecting member to move on the first ball screw, forcing the first guide rod to move, thereby driving the first connecting assembly to move.

[0015] Preferably, the first transmission assembly further includes a pair of first synchronous pulleys, one of which is located at one end of the first ball screw, and the other is located at one end of the first servo motor. The first belt loop is fitted onto the first synchronous pulley and is connected to the first synchronous pulley for transmission.

[0016] Preferably, the first synchronous wheel is a wheel-shaped structure with a central connecting hole, the output end of the first servo motor is inserted into the connecting hole of the first synchronous wheel and connected to the connecting hole of the first synchronous wheel, and one end of the first ball screw is inserted into the connecting hole of another first synchronous wheel and connected to the connecting hole of the other first synchronous wheel.

[0017] Preferably, the outer wall of the first synchronous pulley has a rack, the first belt ring is a belt with a rack, the rack of the first belt ring meshes with the rack of the outer wall of the first synchronous pulley, and is connected to the first synchronous pulley for transmission.

[0018] Preferably, the first connecting assembly includes a first support frame, a first rotating shaft, and a first pin;

[0019] The first support frame is provided with a concave groove, the first rotating shaft is placed in the concave groove, one side wall of the first rotating shaft is connected to the left side wall of the concave groove of the first support frame, the other side wall of the first rotating shaft is connected to the right side wall of the concave groove of the first support frame, and the bottom side wall of the first support frame is connected to the brush head.

[0020] The first rotating shaft is provided with a first through hole, and the first rotating shaft is provided with a first mounting hole in the radial direction. The first mounting hole divides the first through hole into a first sub-through hole and a second sub-through hole. The first mounting hole is used for the insertion of the first transmission component.

[0021] After the first pin passes through the first sub-through hole and the first mounting hole of the first rotating shaft, it connects with the second sub-through hole, thereby movably connecting the first rotating shaft and the first transmission assembly.

[0022] Preferably, the number of the at least one servo motor is four, namely two first servo motors and two second servo motors; the number of the at least one transmission component is four, namely two first transmission components and two second transmission components; the number of the at least one bracket is two, namely two first brackets and two second brackets; and the number of the at least one connecting component is two, namely two first connecting components and two second connecting components.

[0023] The two first servo motors are located in a straight line and are mounted on the support frame, and the two first connecting components are respectively connected to the brush head component;

[0024] The two second servo motors are located in a straight line and mounted on the support frame, and the two second connecting components are respectively connected to the brush head component.

[0025] Preferably, the two first servo motors operate at their respective memory torques, which are the torques of the first servo motors when the brush head touches the table surface.

[0026] Implementing the embodiments of this utility model will have the following beneficial effects:

[0027] With the aforementioned printing head assembly, the servo motor is mounted on the support frame and can drive the transmission assembly to move precisely. The bracket is fixed on the support frame and rotatably connected to the transmission assembly, supporting the transmission assembly. When the transmission assembly moves precisely, it drives the connecting assembly to move precisely, and when the connecting assembly moves, it drives the brush head to move precisely. This solution solves the technical problems of low brush head movement accuracy and uneven printing film thickness caused by the low precision and instability of the cylinder driving the brush head movement in existing technologies, by controlling the precise movement of the brush head. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] in:

[0030] Figure 1 This is a schematic diagram of a printhead assembly in one embodiment.

[0031] Figure 2 This is a schematic diagram of the printhead assembly in another embodiment.

[0032] Figure 3 This is a schematic diagram of the printhead assembly in another embodiment.

[0033] Figure 4 This is a schematic diagram of the second transmission component and the second connection component in one embodiment.

[0034] Figure 5 This is a schematic diagram of a first transmission component, a first drive component, and a first connection component in one embodiment.

[0035] Figure 6 This is a schematic diagram of the second connection component in one embodiment.

[0036] Figure 7 This is a schematic diagram of the structure of the second connector in one embodiment.

[0037] Figure 8 This is a schematic diagram of the first connection component in one embodiment.

[0038] Figure 9 This is a schematic diagram of the first connector in one embodiment.

[0039] In the diagram: 1. First servo motor; 5. Second servo motor; 12. Support frame; 2. First transmission assembly; 21. First ball screw; 232. First screw bearing; 2322. First flange; 22. First belt ring; 231. First connector; 2311. First upper end face; 2312. First mounting plate; 24. First guide rod; 11. First synchronous pulley; 6. Second transmission assembly; 61. Second ball screw; 632. Second screw bearing; 6321. Second flange; 62. Second belt ring ; 631, Second connecting piece; 6311, Second upper end face; 6312, Second mounting plate; 64, Second guide rod; 65, Second synchronous pulley; 9, Bracket; 911, First limiting hole; 921, Second limiting hole; 3, First connecting assembly; 31, First support frame; 32, First rotating shaft; 321, First mounting hole; 33, First pin; 7, Second connecting assembly; 71, Second support frame; 72, Second rotating shaft; 721, Second mounting hole; 73, Second pin; 4, Squeegee; 8, Ink return knife. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] like Figure 1 As shown, this utility model embodiment proposes a printing head assembly including at least one servo motor, a support frame 12, at least one transmission component, at least one bracket, at least one connecting component, and at least one brush head component;

[0042] The servo motor is connected to the support frame 12, the bracket 9 is connected to the support frame 12, and the transmission component is rotatably connected to the bracket 9 and supported by the bracket 9.

[0043] The transmission component is connected to the output end of the connecting component and the servo motor respectively. The servo motor drives the transmission component to move, and when the transmission component moves, it drives the connecting component to move, thereby driving the brush head component to move.

[0044] The above solution, by controlling the torque of the servo motor, enables precise movement of the transmission component. This movement, in turn, drives the connecting component, which in turn moves the brush head precisely. This solution solves the technical problems of low brush head movement accuracy, uneven film thickness, and low printing quality caused by the low precision and instability of the cylinder driving the brush head in existing technologies.

[0045] Furthermore, the brush head component is either a scraper 4 or a back-ink blade 8.

[0046] Furthermore, such as Figure 1 As shown, the brush head assembly includes a scraper 4 and a return ink blade 8, and at least two servo motors, namely a first servo motor 1 and a second servo motor 5; the transmission assembly includes a first transmission assembly 2 and a second transmission assembly 6; the connection assembly includes a first connection assembly 3 and a second connection assembly 7.

[0047] The first transmission assembly 2 and the second transmission assembly 6 are respectively connected to the bracket 9;

[0048] The first transmission component 2 is connected to the first connecting component 3 and the output end of the first servo motor 1. The first servo motor 1 drives the first transmission component 2 to move. The movement of the first transmission component 2 drives the first connecting component 3 to move, thereby driving the scraper 4 to move.

[0049] The second transmission component 6 is connected to the second connecting component 7 and the output end of the second servo motor 5. The second servo motor 5 drives the second transmission component 6 to move. The movement of the second transmission component 6 drives the second connecting component 7 to move, thereby driving the ink return blade 8 to move.

[0050] In this solution, the movement of both the doctor blade 4 and the ink return blade 8 is controlled by servo motors. Because the rotational torque of the servo motors is controllable, they can drive the transmission components to move precisely. The movement of the transmission components drives the connecting components, which in turn drives the brush head to move precisely. This solution, by controlling the precise movement of the doctor blade 4 and the ink return blade 8, solves the technical problems of low brush head movement precision, uneven film thickness, and low printing quality caused by the low precision and instability of the cylinders driving the brush head in existing technologies.

[0051] Furthermore, such as Figure 2 , Figure 5 As shown, the first transmission assembly 2 includes a first ball screw 21, a first screw bearing 232, a first belt ring 22, a first connector 231, and a first guide rod 24;

[0052] One end of the first belt ring 22 is fitted onto the output end of the first servo motor 1, and the other end is fitted onto one end of the first ball screw 21;

[0053] The first connector 231 is connected to the first lead screw bearing 232 and the first guide rod 24 respectively. The first guide rod 24 is movably connected to the first connecting assembly 3. One end of the first ball screw 21 passes through the first connector 231, passes through the first lead screw bearing 232, and is rotatably connected to the bracket 9.

[0054] When the output end of the first servo motor 1 rotates, it drives the first belt ring 22 to drive. When the first belt ring 22 drives, it drives the first ball screw 21 to rotate. When the first ball screw 21 rotates, the first screw bearing 232 drives the first connecting piece 231 to move on the first ball screw 21, forcing the first guide rod 24 to move, so as to drive the first connecting assembly 3 to move.

[0055] Specifically, such as Figure 1 As shown, it also includes a first bearing and a second bearing. The first bracket 9 is provided with a first limiting hole 911 and a second limiting hole 921. The first bearing is sleeved on one end of the first transmission component 2 and embedded in the first limiting hole 911. The second bearing is sleeved on one end of the second transmission component 6 and embedded in the second limiting hole 921.

[0056] Specifically, such as Figure 2 , Figure 5 , Figure 9 As shown, the first connector 231 has a through hole and is sleeved on the first lead screw bearing 232 through the through hole. The first connector 231 has a first upper end face 2311 and the first lead screw bearing 232 has a first flange 2322. The first upper end face 2311 is connected to the first flange 2322. The first flange 2322 has a threaded hole and the first upper end face 2311 of the first connector 231 has a corresponding threaded hole. The screw is screwed into the threaded hole of the first lead screw bearing 232 and the corresponding threaded hole of the first upper end face 2311, and connects the first lead screw bearing 232 and the first connector 231.

[0057] Specifically, the first connector 231 is provided with a first mounting plate 2312, which is connected to the first transmission assembly 2.

[0058] Specifically, the first lead screw bearing 232 is adapted to the first ball screw 21. When the first ball screw 21 rotates, the first lead screw bearing 232 moves on the first ball screw 21 through the balls, thereby converting the rotational motion of the first ball screw 21 into linear motion.

[0059] It should be noted that when the first lead screw bearing 232 moves, it drives the first connecting member 231 to move; when the first connecting member 231 moves, it drives the first transmission assembly 2 to move; and when the first transmission assembly 2 moves, it drives the doctor blade 4 to move. This solution converts the rotational motion of the first ball screw 21 into linear motion through the first lead screw bearing 232, achieving precise movement of the doctor blade 4, thereby improving printing accuracy and solving the technical problems of low printing accuracy and uneven film thickness in existing technologies.

[0060] Similarly, such as Figure 1 , Figure 3 , Figure 4 , Figure 7As shown, the second transmission assembly 6 includes a second ball screw 61, a second screw bearing 632, a second belt ring 62, a second connector 631, and a second guide rod 64;

[0061] One end of the second belt ring 62 is fitted onto the output end of the second servo motor 5, and the other end is fitted onto one end of the second ball screw 61;

[0062] The second connector 631 is connected to the second lead screw bearing 632 and the second guide rod 64 respectively. The second guide rod 64 is movably connected to the second connecting assembly 7. One end of the second ball screw 61 passes through the second connector 631, passes through the second lead screw bearing 632, and is rotatably connected to the bracket 9.

[0063] When the output end of the second servo motor 5 rotates, it drives the second belt ring 62 to drive. When the second belt ring 62 drives, it drives the second ball screw 61 to rotate. When the second ball screw 61 rotates, the second screw bearing 632 drives the second connecting piece 631 to move on the second ball screw 61, forcing the second guide rod 64 to move, so as to drive the second connecting piece 631 to move.

[0064] Specifically, such as Figure 4 , Figure 7 As shown, the second connecting member 631 has a through hole and is sleeved on the second lead screw bearing 632 through the through hole. The second connecting member 631 has a second upper end face 6311, and the second lead screw bearing 632 has a second flange 6321. The second upper end face 6311 is connected to the second flange 6321. The second flange 6321 has a threaded hole, and the second upper end face 6311 of the second connecting member 631 has a corresponding threaded hole. A screw is screwed into the threaded hole of the second lead screw bearing 632 and the corresponding threaded hole of the second upper end face 6311, thus connecting the second lead screw bearing 632 and the second connecting member 631.

[0065] Specifically, the second connector 631 is provided with a second mounting plate 6312, which is connected to the second transmission assembly 6.

[0066] Specifically, the second lead screw bearing 632 is adapted to the second ball screw 61. When the second ball screw 61 rotates, the second lead screw bearing 632 moves on the second ball screw 61 through the balls, thereby converting the rotational motion of the second ball screw 61 into linear motion.

[0067] It should be noted that when the second lead screw bearing 632 moves, it drives the second connecting member 631 to move; when the second connecting member 631 moves, it drives the second transmission assembly 6 to move; and when the second transmission assembly 6 moves, it drives the doctor blade 4 to move. This solution converts the rotational motion of the second ball screw 61 into linear motion through the second lead screw bearing 632, achieving precise movement of the doctor blade 4, thereby improving printing accuracy and solving the technical problems of low printing accuracy and uneven film thickness in existing technologies.

[0068] Furthermore, such as Figure 2 As shown, the first transmission assembly 2 also includes a pair of first synchronous pulleys 11. One first synchronous pulley 11 is located at one end of the first ball screw 21, and the other first synchronous pulley 11 is located at one end of the first servo motor 1. The first belt ring 22 is sleeved on the first synchronous pulley 11 and is connected to the first synchronous pulley 11 for transmission.

[0069] Furthermore, the first synchronous wheel 11 is a wheel-shaped structure with a central connecting hole. The output end of the first servo motor 1 is inserted into the connecting hole of the first synchronous wheel 11 and connected to the connecting hole of the first synchronous wheel 11. One end of the first ball screw 21 is inserted into the connecting hole of another first synchronous wheel 11 and connected to the connecting hole of the other first synchronous wheel 11.

[0070] It should be noted that the first servo drives the first synchronous pulley 11 to rotate. When the first synchronous pulley 11 rotates, it drives the first belt ring 22 through a transmission connection. When the first belt ring 22 rotates, it drives another first synchronous pulley 11 to rotate. When the second synchronous pulley 65 rotates, it drives the first ball screw 21 to rotate. This solution uses the precise torque of the first servo motor 1 to drive the first ball screw 21 to move precisely through the precise transmission of the first belt ring 22 and the first synchronous pulley 11. This causes the first connecting component 3 to move precisely, and when the first connecting component 3 moves, it drives the doctor blade 4 to move precisely. This solves the technical problems of low printing accuracy and uneven film thickness caused by cylinder instability in the prior art.

[0071] Similarly, such as Figure 3 As shown, the second transmission assembly 6 also includes a pair of second synchronous pulleys 65. One second synchronous pulley 65 is located at one end of the second ball screw 61, and the other second synchronous pulley 65 is located at one end of the second servo motor 5. The second belt ring 62 is sleeved on the second synchronous pulley 65 and is connected to the second synchronous pulley 65 in a transmission connection.

[0072] The second synchronous wheel 65 is a wheel-shaped structure with a central connecting hole. The output end of the second servo motor 5 is inserted into the connecting hole of the second synchronous wheel 65 and connected to the connecting hole of the second synchronous wheel 65. One end of the second ball screw 61 is inserted into the connecting hole of another second synchronous wheel 65 and connected to the connecting hole of the other second synchronous wheel 65.

[0073] It should be noted that the second servo drives the second synchronous pulley 65 to rotate. When the second synchronous pulley 65 rotates, it drives the second belt ring 62 through a transmission connection. When the second belt ring 62 rotates, it drives another second synchronous pulley 65 to rotate. When the second synchronous pulley 65 rotates, it drives the second ball screw 61 to rotate. This solution uses the precise torque of the second servo motor 5 to drive the precise movement of the second ball screw 61 through the precise transmission of the second belt ring 62 and the second synchronous pulley 65, so that the second connecting component 7 moves precisely. When the second connecting component 7 moves, it drives the doctor blade 4 to move precisely, thus solving the technical problems of low printing accuracy and uneven film thickness caused by cylinder instability in the prior art.

[0074] Furthermore, the outer wall of the first synchronous pulley 11 has a rack, and the first belt ring 22 is a belt with a rack. The rack of the first belt ring 22 meshes with the rack of the outer wall of the first synchronous pulley 11 and is connected to the first synchronous pulley 11 for transmission.

[0075] Similarly, the outer wall of the second synchronous pulley 65 has a rack, and the second belt ring 62 is a belt with a rack. The rack of the second belt ring 62 meshes with the rack of the outer wall of the second synchronous pulley 65 and is connected to the second synchronous pulley 65 for transmission.

[0076] It should be noted that by setting the meshing of the rack on the outer side wall of the first synchronous pulley 11 or the second synchronous pulley 65 with the belt teeth, precise movement during the transmission process can be achieved. This solves the technical problem in the prior art where the brush head movement accuracy is not high due to the instability of the belt drive, resulting in low printing accuracy and uneven printing film thickness.

[0077] Furthermore, such as Figure 1 , Figure 8 As shown, the first connecting assembly 3 includes a first support frame 31, a first rotating shaft 32, and a first pin 33;

[0078] The first support frame 31 is provided with a concave groove, the first rotating shaft 32 is placed in the concave groove, one side wall of the first rotating shaft 32 is connected to the left side wall of the concave groove of the first support frame 31, the other side wall of the first rotating shaft 32 is connected to the right side wall of the concave groove of the first support frame 31, and the bottom side wall of the first support frame 31 is connected to the brush head.

[0079] The first rotating shaft 32 is provided with a first through hole, and the first rotating shaft 32 is provided with a first mounting hole 321 in the radial direction. The first mounting hole 321 divides the first through hole into a first sub-through hole and a second sub-through hole. The mounting hole is used for the insertion of the first transmission component 2.

[0080] After the first pin 33 passes through the first sub-through hole and the first mounting hole 321 of the first rotating shaft 32, it connects with the second sub-through hole, so that the first rotating shaft 32 and the first transmission assembly 2 are movably connected.

[0081] It should be noted that the first transmission component 2 and the first rotating shaft 32 are movably connected, that is, the first rotating shaft 32 can rotate longitudinally with the first pin 33 as the fulcrum; when the doctor blade 4 needs to be balanced during printing, the balance self-adaptation is achieved through the movable connection of the first pin 33, which solves the technical problem that the doctor blade 4 needs to be manually balanced during printing in the prior art.

[0082] Similarly, such as Figure 1 , Figure 3 , Figure 6 As shown, the second connecting assembly 7 includes a second support frame 71, a second rotating shaft 72, and a second pin 73;

[0083] The second support frame 71 is provided with a concave groove, the second rotating shaft 72 is placed in the concave groove, one side wall of the second rotating shaft 72 is connected to the left side wall of the concave groove of the second support frame 71, the other side wall of the second rotating shaft 72 is connected to the right side wall of the concave groove of the second support frame 71, and the bottom side wall of the second support frame 71 is connected to the brush head.

[0084] The second rotating shaft 72 is provided with a second through hole, and the second rotating shaft 72 is provided with a second mounting hole 721 in the radial direction. The second mounting hole 721 divides the second through hole into a third sub-through hole and a fourth sub-through hole. The second mounting hole 721 is used for the insertion of the second transmission component 6.

[0085] After the second pin 73 passes through the third sub-through hole and the second mounting hole 721 of the second rotating shaft 72, it connects with the fourth sub-through hole, so that the second rotating shaft 72 and the second transmission assembly 6 are movably connected.

[0086] It should be noted that the second transmission component 6 is movably connected to the second rotating shaft 72, that is, the second rotating shaft 72 can rotate longitudinally with the second pin 73 as the fulcrum; when the ink return knife 8 needs to be balanced during printing, the balance self-adaptation is achieved through the movable connection of the second pin 73, which solves the technical problem that the doctor blade 4 needs to be manually balanced during printing.

[0087] Furthermore, the number of at least four servo motors is two first servo motors 1 and two second servo motors 5, the number of at least four transmission components is two first transmission components 2 and two second transmission components 6, the number of at least four brackets is two first brackets and two second brackets, and the number of at least two connecting components is two first connecting components 3 and two second connecting components 7.

[0088] Two first servo motors 1 are located on the same straight line and are mounted on the support frame 12; two first connecting components 3 are respectively connected to the brush head component.

[0089] Two second servo motors 5 are located on the same straight line and are mounted on the support frame 12. Two second connecting components 7 are respectively connected to the brush head component.

[0090] Furthermore, the two first servo motors 1 operate with their respective memory torques, which are the torques of the first servo motors 1 when the brush head touches the table surface.

[0091] Specifically, there are two of each of the first servo motor 1, the first transmission component 2, and the first connection component 3.

[0092] Including a first left servo motor and a first right servo motor;

[0093] Specifically, when the left end of the scraper 4 touches the table first, the first left servo motor stops servoing and memorizes the torque. When the right end of the scraper 4 touches the table later, the first right servo motor stops servoing and memorizes the torque. Then the first left servo motor and the first right servo motor rotate according to their respective memorized torques.

[0094] When the right end of the scraper 4 touches the table first, the first right servo motor stops servoing and memorizes the torque. When the left end of the scraper 4 touches the table later, the first left servo motor stops servoing and memorizes the torque. Then the first right servo motor and the first left servo motor rotate according to their respective memorized torques.

[0095] When the left and right ends of the scraper 4 simultaneously touch the table surface, the first left servo motor and the first right servo motor stop servoing at the same time and memorize the same torque. Then the first left servo motor and the first right servo motor rotate with the same torque.

[0096] It should be noted that, through the above solution, the servo motor records the height position of the scraper 4 by memorizing the torque, enabling the scraper 4 to automatically find its balance, thus solving the technical problem of the existing technology that requires manual adjustment of the scraper 4's balance.

[0097] Similarly, there are two of each of the second servo motor 5, the second transmission component 6, and the second connection component 7.

[0098] Specifically, this includes the second left servo motor and the second right servo motor;

[0099] When the left end of the retort 8 touches the table first, the second left servo motor stops servoing and memorizes the torque. When the right end of the retort 8 touches the table later, the second right servo motor stops servoing and memorizes the torque. Then the second left servo motor and the second right servo motor rotate according to their respective memorized torques.

[0100] When the right end of the ink reflow knife 8 touches the table first, the second right servo motor stops servoing and memorizes the torque. When the left end of the ink reflow knife 8 touches the table later, the second left servo motor stops servoing and memorizes the torque. Then the second right servo motor and the second left servo motor rotate according to their respective memorized torques.

[0101] When the left and right ends of scraper 4 simultaneously touch the tabletop, the second left servo motor and the second right servo motor stop servoing at the same time and memorize the same torque. Then, the second left servo motor and the second right servo motor rotate with the same torque.

[0102] It should be noted that, through the above solution, the servo motor records the height position of the ink return blade 8 by memorizing the torque, enabling the ink return blade 8 to automatically find its balance, thus solving the technical problem of the existing technology that requires manual adjustment of the balance of the ink return blade 8.

[0103] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A printhead assembly, characterized in that: It includes at least one servo motor, a support frame (12), at least one transmission component, a bracket (9), at least one connecting component, and at least one brush head component; The servo motor is connected to the support frame (12), the bracket (9) is connected to the support frame (12), the transmission component is rotatably connected to the bracket (9) and is supported by the bracket (9); The transmission component is connected to the connecting component and the output end of the servo motor respectively. The servo motor drives the transmission component to move. When the transmission component moves, it drives the connecting component to move, thereby driving the brush head component to move.

2. The printhead assembly as claimed in claim 1, characterized in that: The brush head component is a scraper (4) or a back-inking blade (8).

3. The printhead assembly as claimed in claim 1, characterized in that: The brush head includes a scraper (4) and a back-ink blade (8). The number of the at least one servo motor is two, namely a first servo motor (1) and a second servo motor (5). The transmission assembly includes a first transmission assembly (2) and a second transmission assembly (6). The connection assembly includes a first connection assembly (3) and a second connection assembly (7). The first transmission assembly (2) and the second transmission assembly (6) are respectively connected to the bracket (9); The first transmission component (2) is connected to the first connecting component (3) and the output end of the first servo motor (1). The first servo motor (1) drives the first transmission component (2) to move. The movement of the first transmission component (2) drives the first connecting component (3) to move so as to drive the scraper (4) to move. The second transmission component (6) is connected to the second connection component (7) and the output end of the second servo motor (5). The second servo motor (5) drives the second transmission component (6) to move. The movement of the second transmission component (6) drives the second connection component (7) to move so as to drive the ink return knife (8) to move.

4. The printhead assembly as described in claim 3, characterized in that: The first transmission assembly (2) includes a first ball screw (21), a first screw bearing (232), a first belt ring (22), a first connector (231), and a first guide rod (24). One end of the first belt ring (22) is fitted onto the output end of the first servo motor (1), and the other end is fitted onto one end of the first ball screw (21); The first connector (231) is connected to the first lead screw bearing (232) and the first guide rod (24) respectively. The first guide rod (24) is movably connected to the first connecting assembly (3). One end of the first ball screw (21) passes through the first connector (231), passes through the first lead screw bearing (232), and is rotatably connected to the bracket (9). When the output end of the first servo motor (1) rotates, it drives the first belt ring (22) to drive. When the first belt ring (22) drives, it drives the first ball screw (21) to rotate. When the first ball screw (21) rotates, the first screw bearing (232) drives the first connector (231) to move on the first ball screw (21), forcing the first guide rod (24) to move, so as to drive the first connecting assembly (3) to move.

5. The printhead assembly as described in claim 4, characterized in that: The first transmission assembly (2) further includes a pair of first synchronous pulleys (11), one of the first synchronous pulleys (11) is located at one end of the first ball screw (21), and the other of the first synchronous pulleys (11) is located at one end of the first servo motor (1). The first belt ring (22) is sleeved on the first synchronous pulley (11) and is connected to the first synchronous pulley (11) in a transmission connection.

6. The printhead assembly as claimed in claim 5, characterized in that: The first synchronous wheel (11) is a wheel-shaped structure with a central connection hole. The output end of the first servo motor (1) is inserted into the connection hole of the first synchronous wheel (11) and connected to the connection hole of the first synchronous wheel (11). One end of the first ball screw (21) is inserted into the connection hole of another first synchronous wheel (11) and connected to the connection hole of another first synchronous wheel (11).

7. The printhead assembly as claimed in claim 6, characterized in that: The outer side wall of the first synchronous pulley (11) has a rack, and the first belt ring (22) is a belt with a rack. The rack of the first belt ring (22) meshes with the rack of the outer side wall of the first synchronous pulley (11).

8. The printhead assembly as claimed in claim 3, characterized in that: The first connecting component (3) includes a first support frame (31), a first rotating shaft (32), and a first pin (33); The first support frame (31) is provided with a concave groove, the first rotating shaft (32) is placed in the concave groove, one side wall of the first rotating shaft (32) is connected to the left side wall of the concave groove of the first support frame (31), the other side wall of the first rotating shaft (32) is connected to the right side wall of the concave groove of the first support frame (31), and the bottom side wall of the first support frame (31) is connected to the brush head. The first rotating shaft (32) is provided with a first through hole, and the first rotating shaft (32) is provided with a first mounting hole (321) in the radial direction. The first mounting hole (321) divides the first through hole into a first sub-through hole and a second sub-through hole. The first mounting hole (321) is used for the insertion of the first transmission assembly (2). After the first pin (33) passes through the first sub-through hole and the first mounting hole (321) of the first rotating shaft (32), it connects with the second sub-through hole, so that the first rotating shaft (32) and the first transmission assembly (2) are movably connected.

9. The printhead assembly as claimed in claim 1, characterized in that: The number of at least one servo motors is four, namely two first servo motors (1) and two second servo motors (5); the number of at least one transmission component is four, namely two first transmission components (2) and two second transmission components (6); the number of at least one bracket is two, namely two first brackets (91) and two second brackets (92); and the number of at least one connecting component is two, namely two first connecting components (3) and two second connecting components (7). The two first servo motors (1) are located on the same straight line and are mounted on the support frame (12), and the two first connecting components (3) are respectively connected to the brush head component; The two second servo motors (5) are located in the same straight line and are mounted on the support frame (12), and the two second connecting components (7) are respectively connected to the brush head component.

10. The printhead assembly as claimed in claim 9, characterized in that: The two first servo motors (1) operate at their respective memory torques, which are the torques of the first servo motors (1) when the brush head touches the table surface.

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