Printing device

Abstract

The present application provides a printing device for printing a marking on a wire harness. The printing device includes a frame, a reeling mechanism mounted on the frame, a reeling mechanism, a color identifier, a position detector, a speed detector, a printer, and a controller. The printing device of the present application has higher printing accuracy, more accurate printing position, and saves more printing ink, resulting in lower printing costs.

Description

Technical Field

[0001] The present application relates to the field of automatic printing technology, and in particular to a printing device. Background Art

[0002] Flat cable harnesses are thin, flexible flat cables with excellent flexibility and heat dissipation. The clock spring, also known as a rotary connector, connects the vehicle's main airbag to the airbag wiring harness and rotates with the steering wheel. The flat cable harness is enclosed within the clock spring and rotates with it, arranged in a multi-layered, staggered, and curved pattern, expanding and contracting to varying lengths as the spring rotates. To effectively prevent the flat cable harness from breaking at extreme positions, it must be locked in the center position within the clock spring during production and before shipment. Therefore, a transparent window is provided in the clock spring housing. The printed identifier on the flat cable harness is visible when the cable is inserted into the housing. Positioning pins are used to secure the cable, allowing operators to determine the actual position of the harness within the clock spring.

[0003] However, existing printing measures are mainly based on manual methods, which have problems such as low accuracy, low efficiency and high labor intensity. Summary of the Invention

[0004] The present application provides a printing device with higher printing precision and more accurate printing position.

[0005] The present application provides a printing device for printing a mark on a wire harness. The printing device is used to print a mark on a wire harness. The printing device includes a frame and a reeling mechanism mounted on the frame, a reeling mechanism, a color identifier, a position detector, a speed detector, a printer, and a controller. The reeling mechanism is used to release the wire harness so that the wire harness is printed with a mark by the printer, and the printed wire harness is then recovered by the reeling mechanism. Before the wire harness is printed with a mark, the wire harness needs to be inspected by the color identifier, the position detector, and the speed detector. The color identifier is used to identify the color marking of the wire harness (the wire harness is already marked with a color marking before being assembled to the reeling mechanism). When the color identifier identifies a specified color (e.g., black), the inspected wire harness is judged to be a good product and a printable signal is generated. When the color identifier identifies another specified color (e.g., red), the inspected wire harness is judged to be a defective product (a defective product may become a good product after reprocessing), and no printable signal is generated. Compared to the prior art printing devices, the printing device of the present application saves more printing ink and has lower printing costs. The positioning detector is used to detect the position of the starting end of the wire harness to generate a wire harness starting position signal. The speed detector is used to detect the movement speed of the wire harness to generate a speed signal. In the present application, the speed detector always detects the movement speed of the wire harness to obtain a speed signal. When a new wire harness passes by, the positioning detector first detects the position signal of the starting end of the wire harness, and then the color identifier detects the color mark of the wire harness. The controller obtains the position of the color mark relative to the starting end based on the detection time difference between the positioning detector and the color identifier and the movement speed of the wire harness. After obtaining the position information, the controller controls the printer to print a mark at a specified position (excluding the starting end and the color mark area in the wire harness) of a good product (a wire harness that can be printed) based on the printable signal detected by the color identifier. The specified position can be set accordingly based on the above-mentioned position signal and speed signal. Compared to the prior art printing devices, the printing position of the printing device of the present application is more accurate. When the user assembles the wire harness in the device based on the mark position, the assembly accuracy is higher. In the present application, the printer can print a logo onto a moving wire harness, and the controller can adjust the printing speed of the printer according to the change in the speed of the wire harness. For example, when the speed of the wire harness increases, the printing speed of the printer increases accordingly, and when the speed of the wire harness decreases, the printing speed of the printer decreases accordingly. Compared with the existing printing device, the printing device of the present application can print a logo onto a moving wire harness, and adjust the printing speed according to the speed of the wire harness, so that the printed logo will not be stretched or compressed due to the speed of the wire harness being too fast or too slow, ensuring the accuracy of the logo size. Therefore, the printing accuracy of the printing device of the present application is higher. When the logo is text, the text is clearer and easier to recognize.

[0006] In one possible design, the speed detector includes a speed detection shaft, the printing device also includes a first material guiding mechanism, the first material guiding mechanism includes a first rotating wheel, the first rotating wheel is used to abut against the wire harness so that the first rotating wheel can rotate under the drive of the wire harness, the first rotating wheel is connected to the speed detection shaft, and the first rotating wheel drives the speed detection shaft to rotate so that the speed detector detects the movement speed of the wire harness.

[0007] In one possible design, the printing device also includes a first material guiding mechanism and a first limiting mechanism. The first material guiding mechanism includes a first rotating wheel, which is used to abut against the wire harness to change the movement direction of the wire harness. The first limiting mechanism includes a second rotating wheel, which is used to press the wire harness to the first rotating wheel to limit the wire harness from detaching from the first rotating wheel. The second rotating wheel can also detach from the first rotating wheel to allow the wire harness to pass between the second rotating wheel and the first rotating wheel.

[0008] In a possible design, the first limiting mechanism includes a first connecting rod and a first elastic member in a compressed state. The first connecting rod is rotatably connected to the frame, and the first connecting rod is also rotatably connected to the second rotating wheel. One end of the first elastic member is connected to the frame, and the other end of the first elastic member is connected to the first connecting rod. Under the elastic force of the first elastic member, the first connecting rod drives the second rotating wheel to press the wiring harness to the first rotating wheel.

[0009] In one possible design, the first limiting mechanism also includes a cam, which is rotatably connected to the frame, and the rim of the cam abuts against the first connecting rod. The rotated cam is used to push the first connecting rod to rotate relative to the frame to drive the second rotating wheel to disengage from the first rotating wheel.

[0010] In one possible design, the unwinding mechanism includes a connected unwinding tray and a first motor. The first motor drives the unwinding tray to rotate to release the wire harness. The controller controls the first motor according to the torque signal of the first motor, and when the torque of the first motor is less than a set safety value, controls the first motor to drive the unwinding tray to rotate in the opposite direction to pull back the wire harness to keep the wire harness in a tensioned state.

[0011] In one possible design, the printing device also includes a traction mechanism, which includes a second motor and a third rotating wheel connected to each other, and the third rotating wheel is used to abut against the wiring harness. The printing device also includes a second limiting mechanism, and the second limiting mechanism includes a fourth rotating wheel. The fourth rotating wheel is used to press the wiring harness to the third rotating wheel to limit the separation of the wiring harness from the third rotating wheel. The second motor drives the third rotating wheel to rotate to pull the wiring harness.

[0012] In one possible design, the printing device further includes a limiting wheel rotatably connected to the frame, and the limiting wheel is used to abut against the wire harness to limit the movement of the wire harness located in the detection area of ​​the color identifier relative to the color identifier along the first direction.

[0013] In one possible design, the printing device also includes a second material guide mechanism, which includes a first material guide plate, a second material guide plate and a material guide member. The first material guide plate and the second material guide plate are both installed on the frame and are both provided with a first slide groove. The material guide member is passed through the first slide groove. The first material guide plate is used to abut against the wire harness before printing, and the second material guide plate is used to abut against the wire harness after printing. The material guide member can slide in the first slide groove, and the material guide member is used to limit the movement of the wire harness relative to the printer along the second direction.

[0014] In one possible design, the first material guide plate and the second material guide plate are both metal plates, and the material guide member is provided with a magnetic attraction portion, which is magnetically attracted to the metal plate; or, the first material guide plate and the second material guide plate are both provided with a magnetic matching portion, and the material guide member is provided with a magnetic attraction portion, which is magnetically attracted to the magnetic attraction portion.

[0015] In a possible design, the second material guide plate is provided with a recessed portion, and the space inside the recessed portion is used to avoid the identification of the wiring harness.

[0016] In one possible design, the second material guide mechanism also includes a bracket and a pressure roller. The bracket is mounted on the second material guide plate. The bracket is provided with a second slide groove extending along the first direction. The pressure roller is passed through the second slide groove. The pressure roller is used to press at least part of the two ends of the wire harness along the second direction to the second material guide plate to limit the movement of the printed wire harness relative to the printer along the first direction, and there is a spacing space between at least part of the pressure roller and the second material guide plate, and the spacing space is used for the marking of the wire harness to pass through.

[0017] In one possible design, the pressing roller includes a pressing section, a connecting section and a sliding section, the two ends of the connecting section are respectively connected to the pressing sections, the end of the pressing section facing away from the connecting section is connected to the sliding section, at least part of the sliding section is located in the second slide groove, wherein the pressing section is used to abut against at least part of the two sides of the wire harness along the second direction, and there is a spacing space between the connecting section and the second guide plate, and the spacing space is used for the identification of the wire harness to pass through.

[0018] In a possible design, the printer includes two printing members arranged opposite to each other along a first direction, and the printing members are used to print identification marks on both sides of the wiring harness along the first direction.

[0019] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a specific embodiment of the printing device provided in this application;

[0021] Figure 2 for Figure 1A schematic diagram of the structure of the printing device from another perspective;

[0022] Figure 3 for Figure 1 A partially enlarged schematic diagram of part A, wherein the first material guiding mechanism, the first limiting mechanism and the speed detector are not shown;

[0023] Figure 4 for Figure 1 A partial enlarged schematic diagram of part A, in which the color identifier and positioning detector are not shown;

[0024] Figure 5 for Figure 1 A partial enlarged schematic diagram of part A;

[0025] Figure 6 for Figure 2 A partial enlarged schematic diagram of part B;

[0026] Figure 7 for Figure 1 A partial enlarged schematic diagram of portion C in the middle, wherein the second rotating wheel abuts against the first rotating wheel;

[0027] Figure 8 for Figure 1 A partial enlarged schematic diagram of portion C in the middle, wherein the second rotating wheel is not in contact with the first rotating wheel;

[0028] Figure 9 for Figure 2 A partial enlarged schematic diagram of part D in the middle;

[0029] Figure 10 for Figure 2 A partial enlarged schematic diagram of part E in the middle;

[0030] Figure 11 for Figure 10 Schematic diagram of the assembly structure of the middle frame, the second limiting mechanism and the wiring harness;

[0031] Figure 12 for Figure 11 Schematic diagram of the assembly structure of the midframe, second limiting mechanism and wiring harness from another perspective.

[0032] Reference numerals:

[0033] 1-frame;

[0034] 2- Movement mechanism;

[0035] 21- unwinding mechanism;

[0036] 211-discharging tray;

[0037] 212-first optical axis quick locking assembly;

[0038] 22-rewinding mechanism;

[0039] 221- receiving tray;

[0040] 222-Second optical axis quick locking assembly;

[0041] 23- traction mechanism;

[0042] 231- third rotating wheel; 3- detector;

[0043] 31-color identifier;

[0044] 311-limiting wheel;

[0045] 32-positioning detector;

[0046] 33-speed detector;

[0047] 331-encoder;

[0048] 331a-speed detection shaft; 4-printer;

[0049] 41-printed parts;

[0050] 5- material guiding mechanism;

[0051] 51-first material guiding mechanism;

[0052] 511-first rotating wheel;

[0053] 52- second material guiding mechanism;

[0054] 521-first guide plate;

[0055] 522-second guide plate;

[0056] 522a-recessed portion;

[0057] 523- material guide;

[0058] 523a-magnetic attraction portion;

[0059] 524-first chute;

[0060] 525-bracket;

[0061] 525a-second chute;

[0062] 526-pressing roller;

[0063] 526a-pressing section;

[0064] 526b-connecting segment;

[0065] 526c-sliding section; 6-limiting mechanism;

[0066] 61-first limiting mechanism;

[0067] 611-second rotating wheel;

[0068] 612-first connecting rod;

[0069] 613-first elastic member;

[0070] 614-first support member;

[0071] 615-second connecting rod;

[0072] 615a-cam;

[0073] 62- second limiting mechanism;

[0074] 621-fourth rotating wheel;

[0075] 622-third connecting rod;

[0076] 623- second elastic member;

[0077] 624-second support member; 7-material presence detector;

[0078] 8-Wire harness;

[0079] 81- starting end;

[0080] 82-color marking; 9-air dryer;

[0081] Y-first direction;

[0082] X-second direction;

[0083] Z-third direction;

[0084] L- harness movement direction;

[0085] I-discharging tray rotation direction;

[0086] J-the direction of rotation of the receiving tray.

[0087] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0088] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0089] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0090] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0091] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0092] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0093] The first aspect of the present application provides a printing device, please refer to Figures 1-4 As shown, the printing device is used to print a mark on the wire harness 8. The printing device includes a frame 1 and a reeling mechanism 21, a reeling mechanism 22, a color identifier 31, a positioning detector 32, a speed detector 33, a printer 4 and a controller (not shown in the figure). Figure 3-Figure 4As shown, direction L represents the direction of movement of the wire harness 8. The unwinding mechanism 21 is used to release the wire harness 8 so that the wire harness 8 is spray-printed with a mark by the printer 4, and the wire harness 8 with the spray-printed mark is then recovered by the rewinding mechanism 22. Before the wire harness 8 is spray-printed with a mark, the wire harness 8 needs to be detected by the color identifier 31, the positioning detector 32 and the speed detector 33. The color identifier 31 is used to identify the color mark 82 of the wire harness 8 (the wire harness 8 has been marked with a color mark 82 before being assembled to the unwinding mechanism 21). When the color identifier 31 identifies a specified color (for example, black), it determines that the detected wire harness 8 is a good product and generates a printable signal. When the color identifier 31 identifies another specified color (for example, red), it determines that the detected wire harness 8 is a defective product (a defective product may become a good product after reprocessing), and no printable signal is generated. Compared with the printing device of the prior art, the printing device in the embodiment of the present application saves more printing ink and has a lower printing cost. The position detector 32 is used to detect the position of the starting end 81 of the wire harness 8 to generate a starting position signal of the wire harness 8. The speed detector 33 is used to detect the movement speed of the wire harness 8 to generate a speed signal. In this embodiment, the speed detector 33 always detects the movement speed of the wire harness 8 to obtain a speed signal. When a new wire harness 8 passes by, the position detector 32 first detects the position signal of the starting end 81 of the wire harness 8, and then the color identifier 31 detects the color mark 82 of the wire harness 8. The controller obtains the position of the color mark 82 relative to the starting end 81 based on the detection time difference between the position detector 32 and the color identifier 31 and the movement speed of the wire harness 8. After obtaining the position information, the controller controls the printer 4 to print a mark at a specified position (the area of ​​the wire harness 8 excluding the starting end 81 and the color mark 82) of a good product (a wire harness 8 that can be printed) based on the printable signal detected by the color identifier 31. The specified position can be set accordingly based on the above-mentioned position signal and speed signal. Compared with the prior art printing device, the printing position of the printing device in the embodiment of the present application is more accurate. When the user assembles the wiring harness 8 in the device according to the identification position, the assembly accuracy is higher. In this embodiment, the printer 4 can print the identification on the moving wiring harness 8, and the controller can adjust the printing speed of the printer 4 according to the change of the movement speed of the wiring harness 8. For example, when the movement speed of the wiring harness 8 increases, the printing speed of the printer 4 increases accordingly. When the movement speed of the wiring harness 8 decreases, the printing speed of the printer 4 decreases accordingly. Compared with the prior art printing device, the printing device in the embodiment of the present application can print the identification on the moving wiring harness 8 and adjust the printing speed according to the movement speed of the wiring harness 8, so that the printed identification will not be stretched or compressed due to the excessively fast or slow movement speed of the wiring harness, thereby ensuring the accurate size of the identification. Therefore, the printing accuracy of the printing device in the embodiment of the present application is higher. When the identification is text, the text is clearer and easier to recognize.

[0094] In other embodiments, the wire harness 8 to be printed may also be paused after moving to the position to be printed, and the wire harness 8 may continue to move after the printer 4 prints a mark on the wire harness 8 .

[0095] Please refer to Figure 3 As shown, the starting end 81 of the wire harness 8 may be provided with a copper sheet, and the positioning detector 32 detects the position of the copper sheet by laser positioning, thereby obtaining the position information of the starting end 81. Of course, the starting end 81 of the wire harness 8 may also be provided with a metal sheet, and the positioning detector 32 may also detect the position of the metal sheet by magnetic induction or electric induction, thereby obtaining the position information of the starting end 81.

[0096] In addition, multiple wire harnesses 8 can be connected together to form a material tape, which is wound in the unwinding mechanism 21. By pulling out part of the material tape and installing it on the printing device of the embodiment of the present application, continuous detection and printing of multiple wire harnesses 8 can be achieved, and the work efficiency is high.

[0097] The wiring harness in the embodiment of the present application may be a cable harness or other flat material strips.

[0098] In the embodiments of this application, Figure 3 The first direction Y shown may be a vertical direction, the second direction X may be a horizontal direction, more specifically, the second direction X may be a width direction of the wire harness 8, the third direction Z may be a horizontal direction, and the first direction Y, the second direction X and the third direction Z are perpendicular to each other.

[0099] Please refer to Figure 3 As shown, the printing device also includes a limiting wheel 311, which is rotatably connected to the frame 1. The limiting wheel 311 is used to abut against the wire harness 8 to limit the movement of the wire harness 8 located in the detection area of ​​the color identifier 31 relative to the color identifier 31 along the thickness direction of the wire harness 8 (for example, the first direction Y).

[0100] In this embodiment, please refer to Figure 3 As shown, the limiting wheel 311 can keep a certain tension on the wire harness 8 located in the detection area of ​​the color identifier 31, and the possibility of the wire harness 8 shaking relative to the color identifier 31 along the thickness direction of the wire harness 8 (first direction Y) is small, so that the color identifier 31 can accurately and sensitively detect the color of the color mark 82 in the wire harness 8 (for example, the color of the color mark 82 can be red, and the background color of the wire harness 8 can be pink. The two colors belong to the same color system. When the wire harness 8 shakes, the color identifier 31 may not recognize the color of the color mark 82), reducing the possibility of misjudgment resulting in the generation of an erroneous signal so that the controller generates an erroneous control instruction. Therefore, the working reliability of the printing device of the embodiment of the present application is high. The limiting wheel 311 rotates relative to the frame 1 under the drive of the wire harness 8, which can reduce the risk of the limiting wheel 311 wearing the wire harness 8.

[0101] When the moving direction L of the wire harness 8 is changed, the thickness direction of the wire harness 8 may be a horizontal direction (eg, the third direction Z), or any direction on the plane where the second direction Y and the third direction Z are located.

[0102] For details, please refer to Figure 4-Figure 5 As shown, the speed detector 33 includes a speed detection shaft 331a, and the printing device also includes a first material guide mechanism 51. The first material guide mechanism 51 includes a first rotating wheel 511. The first rotating wheel 511 is used to abut against the wire harness 8 so that the first rotating wheel 511 can rotate under the drive of the wire harness 8. The first rotating wheel 511 is connected to the speed detection shaft 331a in a transmission connection. The first rotating wheel 511 drives the speed detection shaft 331a to rotate so that the speed detector 33 detects the movement speed of the wire harness 8, thereby generating a speed signal. The controller controls the printing device based on the speed signal of the speed detector 33, so that the position and size of the mark are more accurate. When the user assembles the wire harness 8 in the device according to the position of the mark, the assembly accuracy is higher. When the mark is text, the mark with accurate size is easier to be recognized.

[0103] Please refer to Figure 5 As shown, the speed detector 33 may include an encoder 331, which is provided with a speed detection shaft 331a. The encoder 331 records the rotation angle of the speed detection shaft 331a (the first rotating wheel 511) and converts it into an electrical signal. The electrical signal is collected by the controller and used to control the printer 4. The speed detector 33 may also include a photoelectric detector (not shown in the figure) that detects the speed of the first rotating wheel 511.

[0104] In addition, please refer to Figure 4-Figure 5 As shown, the wire harness 8 abuts against at least part of the circumferential side wall of the first rotating wheel 511, and the first rotating wheel 511 can act as a pulley, so that the movement direction L of the wire harness 8 is changed and enters the next station along another movement direction. Figure 4-Figure 5 After passing through the first rotating wheel 511, the wire harness 8, which moves in the first direction Y, can be changed to move in the third direction Z to the printing position (where the printer 4 is located) for printing. Simultaneously, the first rotating wheel 511 can tension the wire harness 8, reducing the possibility of the wire harness 8 slipping relative to the first rotating wheel 511. This increases the reliability of the speed detector 33 in detecting the speed of the wire harness 8. The controller can then collect more accurate speed signals, thereby controlling the printer 4 to accurately print a mark on the wire harness 8.

[0105] Please refer to Figure 4-Figure 5As shown, the first rotating wheel 511 can be installed on one side of the frame body 1 and be rotatably connected to the frame body 1, and the speed detection shaft 331a can be installed on the other side of the frame body 1 and be transmission-connected to the first rotating wheel 511. The transmission connection between the speed detection shaft 331a and the first rotating wheel 511 can be a coaxial connection, or can be connected by gear transmission, belt transmission, chain transmission, etc.

[0106] Please refer to Figure 4-Figure 6 In the illustrated embodiment, the printing device also includes a first limiting mechanism 61, which includes a second rotating wheel 611. The second rotating wheel 611 is used to press the wiring harness 8 to the first rotating wheel 511 to limit the wiring harness 8 from detaching from the first rotating wheel 511. The second rotating wheel 611 can also detach from the first rotating wheel 511 to allow the wiring harness 8 to pass between the second rotating wheel 611 and the first rotating wheel 511.

[0107] In this embodiment, please refer to Figure 4-Figure 6 As shown, the first rotating wheel 511 acts as a pulley, changing the direction L of motion of the wire harness 8 and allowing it to enter the next station in another direction. Compared to a system in which the wire harness 8 moves in the same direction, which results in each mechanism or detector being arranged sequentially in the same direction, the embodiment of the present application changes the direction L of motion of the wire harness 8 by the first rotating wheel 511, allowing each mechanism and detector to be more compactly mounted on the frame 1, thereby reducing the footprint of the printing device of the embodiment of the present application. The second rotating wheel 611 of the first limiting mechanism 61 presses the wire harness 8 against the first rotating wheel 511, reducing the possibility of the wire harness 8 being disengaged from the first rotating wheel 511 due to insufficient tension. This increases the reliability of the continuous printing of the marking by the printing device of the embodiment of the present application. When the unwinding mechanism 21 has released all the wire harnesses 8 and a new unprinted wire harness 8 is needed, the user can disengage the second rotating wheel 611 from the first rotating wheel 511, creating a gap between the second rotating wheel 611 and the first rotating wheel 511. The new wire harness 8 passes through this gap, thus completing the process of replenishing the wire harness 8. After the wire harness 8 is replenished, the user can use the second rotating wheel 611 to press the wire harness 8 onto the first rotating wheel 511 .

[0108] The embodiment of the present application does not limit the number of first position-limiting mechanisms 61 or second rotating wheels 611, nor does it limit the number of first material guiding mechanisms 51 or first rotating wheels 511. When the number of first position-limiting mechanisms 61 or second rotating wheels 611 is greater than or equal to two, and the number of first material guiding mechanisms 51 or first rotating wheels 511 is greater than or equal to two, the movement direction L of the wire harness 8 can be changed at least twice, so that the wire harness 8 enters the next workstation along different movement directions. Therefore, multiple different mechanisms can be compactly installed on the frame 1, saving space occupied by the printing device in the embodiment of the present application.

[0109] Please refer to Figure 4-Figure 5 As shown, the first rotating wheel 511 of at least one first material guiding mechanism 51 can be connected to the speed detection shaft 331a of the speed detector 33 in a transmission manner. When the second rotating wheel 611 of the first limiting mechanism 61 presses the wire harness 8 to the first rotating wheel 511, this setting can reduce the possibility of the wire harness 8 slipping relative to the first rotating wheel 511, and also reduce the possibility of the wire harness 8 detaching from the first rotating wheel 511 due to too little tension, so that the speed detector 33 can detect the movement speed of the wire harness 8 with higher reliability, and the controller can collect more accurate speed signals, so as to control the printer 4 to accurately print the logo on the wire harness 8.

[0110] In addition, the second rotating wheel 611 can be a flexible wheel, which reduces the extrusion stress between the second rotating wheel 611 and the wiring harness 8 and reduces the risk of the second rotating wheel 611 damaging the wiring harness 8.

[0111] More specifically, please refer to Figure 7-Figure 8 As shown, the first limiting mechanism 61 includes a first connecting rod 612 and a first elastic member 613 in a compressed state. The first connecting rod 612 is rotatably connected to the frame 1 and is also rotatably connected to the second rotating wheel 611. One end of the first elastic member 613 is directly or indirectly connected to the frame 1, and the other end of the first elastic member 613 is connected to the first connecting rod 612. Under the elastic force of the first elastic member 613, the first connecting rod 612 drives the second rotating wheel 611 to press the wire harness 8 against the first rotating wheel 511. This arrangement can reduce the possibility of the wire harness 8 being separated from the first rotating wheel 511 due to insufficient tension. Therefore, the continuous printing reliability of the printing device in this embodiment of the present application is high. The elastic force of the first elastic member 613 reduces the possibility of the second rotating wheel 611 being arbitrarily separated from the first rotating wheel 511. Therefore, the limiting reliability of the first limiting mechanism 61 in this embodiment of the present application is high. When the unwinding mechanism 21 has released all the wire harnesses 8 and a new unprinted wire harness 8 is needed, the user can directly or indirectly move the first connecting rod 612 to overcome the elastic force of the first elastic member 613, further compressing the first elastic member 613, so that the first connecting rod 612 can drive the second rotating wheel 611 to separate from the first rotating wheel 511, so that there is a gap between the second rotating wheel 611 and the first rotating wheel 511, allowing the new wire harness 8 to pass through the gap, thereby completing the process of replenishing the wire harness 8. After replenishing the wire harness 8, the user stops applying force to the first connecting rod 612, and the first elastic member 613 releases its elastic potential energy. Under the action of the elastic force of the first elastic member 613, the second rotating wheel 611 presses the new wire harness 8 against the first rotating wheel 511.

[0112] Please refer to Figure 7-Figure 8As shown, the first limiting mechanism 61 further includes a first support member 614, which is threadedly connected to the frame body 1. One end of the first elastic member 613 is connected to the first support member 614, and the other end of the first elastic member 613 is connected to the first connecting rod 612. When the user operates the first support member 614 to spirally rotate relative to the frame body 1, the distance between the first support member 614 and the first connecting rod 612 can be changed, that is, the compression degree of the first elastic member 613 is changed, and the elastic force of the first elastic member 613 is adjusted, thereby changing the extrusion stress between the second rotating wheel 611 and the first rotating wheel 511 to meet the needs of different types (e.g., different thicknesses) of wire harnesses 8 passing through.

[0113] In another embodiment (not shown in the figure), the second rotating wheel 611 is connected to the slider, the slider is slidably connected to the frame 1, one end of the first elastic member 613 is connected to the frame 1, and the other end of the first elastic member 613 is connected to the slider. Under the elastic force of the first elastic member 613, the slider drives the second rotating wheel 611 to press the wiring harness 8 to the first rotating wheel 511. The effect is the same as that of the above embodiment and will not be repeated here.

[0114] Please refer to Figure 7-Figure 8 As shown, the first limiting mechanism 61 further includes a cam 615a, which is rotatably connected to the frame body 1. The rim of the cam 615a abuts against the first connecting rod 612. The rotated cam 615a is used to push the first connecting rod 612 to rotate relative to the frame body 1, thereby driving the second rotating wheel 611 to disengage from the first rotating wheel 511. As the rotation angle of the cam 615a changes, the distance between the second rotating wheel 611 and the first rotating wheel 511 is adjusted. On the one hand, this can accommodate the passage of wire harnesses 8 of different thicknesses. On the other hand, it can prevent the user from directly operating the first connecting rod 612 or the second rotating wheel 611, thereby reducing the risk of the user's hand being pinched by the first connecting rod 612 or the second rotating wheel 611.

[0115] Among them, the normal direction of the contact surface between the first connecting rod 612 and at least part of the rim of the cam 615a can be made close to the direction of the elastic force of the first elastic member 613. This setting makes the first connecting rod 612 and the cam 615a in a self-locking state after the user rotates the cam 615a (the second rotating wheel 611 and the first rotating wheel 511 are separated). When the user does not continue to operate the cam 615a, the second rotating wheel 611 and the first rotating wheel 511 remain in a separated state. In this state, the user only needs to operate the wiring harness 8, which simplifies the work process of replenishing the wiring harness 8 and reduces the user's labor intensity.

[0116] In addition, please refer to Figure 7-Figure 8As shown, the first limiting mechanism 61 may include a second connecting rod 615, which is rotatably connected to the frame 1. One end of the second connecting rod 615 is a cam 615a, and the other end of the second connecting rod 615 is used for manual activation by the user. This arrangement is relatively labor-saving and reduces the labor intensity of the user. Of course, in other embodiments (not shown in the figure), the printing device may further include a motor connected to the cam 615a. The controller may control the rotation of the motor, thereby driving the rotation of the cam 615a. This can achieve synchronous and automatic adjustment of multiple cams 615a, reducing the workload of replenishing the wiring harness 8.

[0117] In the above embodiment, please refer to Figure 1-Figure 2 As shown, the unwinding mechanism 21 includes a discharge tray 211 and a first motor (not shown in the figure) connected to each other. The first motor drives the discharge tray 211 to rotate (as shown in the figure). Figure 1 The controller controls the first motor according to the torque signal of the first motor. When the torque of the first motor is less than a set safety value, the controller controls the first motor to drive the discharge tray 211 to rotate in the opposite direction, thereby pulling back the wire harness 8 to keep it tensioned. This reduces the possibility of the wire harness 8 being detached from other mechanisms and causing the printed mark to fail. Therefore, the printing device of the present embodiment has high operating reliability. When the wire harness 8 is tensioned, the controller controls the first motor to drive the discharge tray 211 to rotate in the forward direction, continuing to release the wire harness 8.

[0118] The wire harness 8 is wound around the unwinding tray 211. As the unwinding tray 211 releases the wire harness 8, the mass of the wire harness 8 within the unwinding tray 211 decreases, and accordingly, the radius of the wire harness 8 within the unwinding tray 211 decreases. As the mass of the wire harness 8 required to be pulled by the first motor decreases, i.e., the load on the first motor decreases, the torque required to be output by the first motor decreases accordingly at a set constant speed. The controller determines the change in the radius of the wire harness 8 within the unwinding tray 211 based on the torque signal from the first motor. This allows the controller to determine whether the wire harness 8 released by the unwinding tray 211 is in a tensioned state due to a shift in its direction of motion. When the torque is less than a user-set safety value, the controller controls the unwinding mechanism 21 to retract the wire harness 8. During the unwinding process, the wire harness 8 may need to be retracted multiple times. Therefore, the safety value varies over time, for example, decreasing periodically. The safety value can be set based on user needs.

[0119] In addition, the first motor is provided with or connected to a rotating shaft (not shown in the figure), the rotating shaft is rotatably connected to the frame 1, and the rotating shaft is detachably connected to the discharge tray 211. The unwinding mechanism 21 also includes a first optical axis quick locking assembly 212, and the first optical axis quick locking assembly 212 is detachably connected to the rotating shaft (the first optical axis quick locking assembly 212 includes a steel ball and a spring, and the spring pushes the steel ball against the rotating shaft to achieve the connection between the first optical axis quick locking assembly 212 and the rotating shaft). The first optical axis quick locking assembly 212 is used to limit the axial movement of the discharge tray 211 relative to the frame 1 along the rotating shaft. The user only needs to plug and unplug the first optical axis quick locking assembly 212 on the rotating shaft to limit or release the limit on the discharge tray 211, that is, the installation and disassembly process is more simplified, and the user's labor intensity is low.

[0120] Similarly, please refer to Figure 1-Figure 2 As shown, the winding mechanism 22 includes a receiving tray 221 and a third motor (not shown in the figure), and the third motor drives the receiving tray 221 to rotate (as shown in the figure). Figure 1 The third motor is provided with or connected to a rotating shaft (not shown in the figure), which is rotatably connected to the frame 1, and the rotating shaft is detachably connected to the receiving tray 221. The winding mechanism 22 also includes a second optical axis quick locking assembly 222 (the second optical axis quick locking assembly 222 has the same structure as the first optical axis quick locking assembly 212), and the second optical axis quick locking assembly 222 is detachably connected to the rotating shaft. The second optical axis quick locking assembly 222 is used to limit the axial movement of the receiving tray 221 relative to the frame 1 along the rotating shaft. The second optical axis quick locking assembly 222 has the same effect as the first optical axis quick locking assembly 212 and will not be repeated here. As the receiving tray 221 recovers more wire harnesses 8, according to the above-mentioned principle of motor torque change. The third motor of the winding mechanism 22 gradually increases the torque to keep the wire harness 8 within a constant tension range.

[0121] In the above embodiment, please refer to Figure 9 As shown, the printing device also includes a traction mechanism 23 and a second limiting mechanism 62. The traction mechanism 23 includes a second motor (not shown in the figure) and a third rotating wheel 231 connected to each other. The third rotating wheel 231 is used to abut against the wiring harness 8. The second limiting mechanism 62 includes a fourth rotating wheel 621. The fourth rotating wheel 621 is used to press the wiring harness 8 to the third rotating wheel 231 to limit the separation of the wiring harness 8 from the third rotating wheel 231. The second motor drives the third rotating wheel 231 to rotate for pulling the wiring harness 8.

[0122] In this embodiment, please refer to Figure 9As shown, the traction mechanism 23 is used to pull the wire harness 8 released from the unwinding mechanism 21 so that the wire harness 8 can be retracted by the reeling mechanism 22. Through the coordination of the unwinding mechanism 21, the reeling mechanism 22, and the traction mechanism 23 (coordination of parameters such as torque and rotational speed), the variation in the tension of the wire harness 8 is kept small, reducing the possibility of the wire harness 8 escaping the mechanism due to insufficient tension, and also reducing the possibility of the wire harness 8 breaking due to excessive tension. The fourth rotating wheel 621 of the second limiting mechanism 62 presses the wire harness 8 against the third rotating wheel 231. This can reduce the possibility of the wire harness 8 escaping the third rotating wheel 231 and causing traction failure, and also reduce the possibility of the wire harness 8 slipping relative to the third rotating wheel 231 and causing traction failure.

[0123] Please refer to Figure 9 As shown, the second limiting mechanism 62 includes a third connecting rod 622 and a second elastic member 623 in a compressed state. The third connecting rod 622 is rotatably connected to the frame body 1 and is also rotatably connected to the fourth rotating wheel 621. One end of the second elastic member 623 is connected to a second support member 624 mounted on the frame body 1, and the other end of the second elastic member 623 is connected to the third connecting rod 622. Under the elastic force of the second elastic member 623, the third connecting rod 622 drives the fourth rotating wheel 621 to press the wiring harness 8 against the third rotating wheel 231. The effect of the second limiting mechanism 62 is the same as that of the first limiting mechanism 61 and will not be repeated here. The second support member 624 can be threadedly connected to the frame 1. When the user operates the second support member 624 to spirally rotate relative to the frame 1, the distance between the second support member 624 and the third connecting rod 622 can be changed, and the compression degree of the second elastic member 623 can be changed, thereby changing the elastic force of the second elastic member 623, and finally changing the extrusion stress between the third rotating wheel 231 and the fourth rotating wheel 621, to adapt to different types (thickness, strength, surface friction coefficient) of wiring harnesses 8.

[0124] In addition, the fourth rotating wheel 621 may be a flexible wheel, so as to reduce the risk of the wire harness 8 being damaged due to excessive extrusion stress between the fourth rotating wheel 621 and the wire harness 8 .

[0125] Of course, in another embodiment (not shown in the figure), the fourth rotating wheel 621 can also be connected to the slider, the slider is slidably connected to the frame 1, one end of the second elastic member 623 is connected to the frame 1, and the other end of the second elastic member 623 is connected to the slider. The effect is the same as the above content and will not be repeated here.

[0126] In the above embodiment, the first elastic member 613 and the second elastic member 623 may be springs or other colloids with elastic deformation capability.

[0127] In the above embodiment, please refer to Figure 10-12As shown, the printing device also includes a second material guide mechanism 52, which includes a first material guide plate 521, a second material guide plate 522, and a material guide member 523. The first material guide plate 521 and the second material guide plate 522 are both mounted on the frame 1 and each has a first slide groove 524. The material guide member 523 is disposed in the first slide groove 524 and is capable of sliding within the first slide groove 524. The first material guide plate 521 is used to abut the wire harness 8 before printing, and the second material guide plate 522 is used to abut the wire harness 8 after printing. The first and second material guide plates 521 and 522 are used to limit the movement of the wire harness 8 relative to the printer 4 along the thickness direction of the wire harness 8 (first direction Y), and the material guide member 523 is used to limit the movement of the wire harness 8 relative to the printer 4 along the width direction of the wire harness 8 (second direction X). Therefore, the printing device of the present embodiment has higher printing accuracy. Furthermore, since the material guide 523 can slide in the first sliding groove 524, the wire harnesses 8 of different widths can be restricted.

[0128] For details, please refer to Figure 11-12 As shown, the first guide plate 521 and the second guide plate 522 are both metal plates, and the guide member 523 is provided with a magnetic portion 523a that magnetically engages with the metal plate. This arrangement allows the user to easily release the connection between the guide member 523 and the first chute 524. After changing the position of the guide member 523 relative to the first chute 524, the magnetic portion 523a magnetically engages with the metal plate, restricting the sliding of the guide member 523 relative to the first chute 524. This operation is relatively simple and requires minimal labor for the user.

[0129] The magnetic attraction portion 523 a is magnetically attracted to a side of the metal plate facing away from the wire harness 8 .

[0130] In another embodiment (not shown in the figure), the first material guide plate 521 and the second material guide plate 522 are both provided with a magnetic matching part, and the material guide member 523 is provided with a magnetic attraction part 523a, and the magnetic matching part is magnetically attracted to the magnetic attraction part 523a. The effect of this embodiment is the same as that of the above content and will not be repeated here.

[0131] Please refer to Figure 11-12 As shown, the second guide plate 522 is provided with a recessed portion 522a, and the space inside the recessed portion 522a is used to avoid the marking of the wiring harness 8, thereby reducing the possibility of the marking being blurred due to the marking of the wiring harness 8 being scratched by the second guide plate 522 due to not being completely dried. Therefore, the working reliability of the printing device of the embodiment of the present application is relatively high.

[0132] Please refer to Figure 11-12As shown, the second material guide mechanism 52 also includes a bracket 525 and a pressing roller 526. The bracket 525 is installed on the second material guide plate 522. The bracket 525 is provided with a second slide groove 525a extending along the thickness direction of the wire harness 8 (the first direction Y). The pressing roller 526 is passed through the second slide groove 525a. The pressing roller 526 is used to press at least part of the two ends of the wire harness 8 along the width direction (the second direction X) of the wire harness 8 to the second material guide plate 522 to limit the movement of the printed wire harness 8 relative to the printer 4 along the thickness direction (the first direction Y) of the wire harness 8, and there is a spacing space between at least part of the pressing roller 526 and the second material guide plate 522, and the spacing space is used for the identification of the wire harness 8 to pass through.

[0133] In this embodiment, please refer to Figure 11-12 As shown, the nip roller 526 is used to limit the movement of the printed wire harness 8 relative to the printer 4 along the thickness direction of the wire harness 8 (first direction Y), thereby reducing the possibility of the wire harness 8 that has not yet been printed shaking relative to the printer 4 along the thickness direction of the wire harness 8 (first direction Y). Therefore, the printing accuracy of the printing device of the embodiment of the present application is higher. Among them, because the nip roller 526 can slide in the second slide groove 525a, it can limit wire harnesses 8 of different thicknesses. In this embodiment, the nip roller 526 is used to press at least part of the two ends of the wire harness 8 along the width direction of the wire harness 8 (second direction X) to the second guide plate 522. There is a gap between at least part of the nip roller 526 and the second guide plate 522. The gap is used for the label of the wire harness 8 to pass through, reducing the possibility of the label of the wire harness 8 being scratched by the nip roller 526 due to not being completely dried, resulting in blurred label. Therefore, the working reliability of the printing device of the embodiment of the present application is higher.

[0134] Please refer to Figure 10 As shown, the printing device of this embodiment of the present application also includes a dryer 9 for blowing air toward the wire harness 8 to quickly dry the markings on the wire harness 8, reducing the possibility of the markings being blurred due to scratches from other components. The nip roller 526 in this embodiment of the present application also reduces the possibility of the wire harness 8 vibrating relative to the printer 4 due to the air from the dryer 9. Therefore, the printing device of this embodiment of the present application achieves higher printing accuracy.

[0135] For details, please refer to Figure 11As shown, the pressing roller 526 includes a pressing section 526a, a connecting section 526b and a sliding section 526c, the two ends of the connecting section 526b are respectively connected to the pressing section 526a, the end of the pressing section 526a facing away from the connecting section 526b is connected to the sliding section 526c, at least part of the sliding section 526c is located in the second slide groove 525a, wherein the pressing section 526a is used to abut against at least part of the two sides of the wire harness 8 along the width direction (second direction X) of the wire harness 8, and there is a spacing space between the connecting section 526b and the second guide plate 522, and the spacing space is used for the wire harness 8 to pass through.

[0136] In this embodiment, please refer to Figure 11 As shown, the pressing section 526a is used to press at least part of the two ends of the wire harness 8 along the width direction (second direction X) of the wire harness 8 to the second guide plate 522, thereby reducing the possibility of the wire harness 8 that has not yet been printed shaking relative to the printer 4 along the thickness direction (first direction Y) of the wire harness 8. Therefore, the printing accuracy of the printing device of the embodiment of the present application is higher. The sliding section 526c is used to slide in the second slide 525a to accommodate wire harnesses 8 of different thicknesses passing between the pressing section 526a and the second guide plate 522. There is a spacing space between the connecting section 526b and the second guide plate 522. The spacing space is used for the marking of the wire harness 8 to pass through, reducing the possibility of the marking of the wire harness 8 being blurred due to the marking not being completely dried and being scratched by the pressing roller 526. Therefore, the working reliability of the printing device of the embodiment of the present application is higher.

[0137] Among them, the pressing section 526a and the connecting section 526b are both cylinders, and the pressing section 526a and the connecting section 526b are coaxially connected. The diameter of the pressing section 526a is larger than the diameter of the connecting section 526b, so that there is a spacing space between the connecting section 526b and the second guide plate 522 for the wiring harness 8 to pass through.

[0138] In addition, the second slide groove 525a is a through groove of the bracket 525, and the sliding section 526c is provided with the second slide groove 525a. The diameter of the sliding section 526c is smaller than the diameter of the pressing section 526a. The required width of the second slide groove 525a is also smaller than the diameter of the pressing section 526a, so that the end of the pressing section 526a away from the connecting section 526b can abut against the bracket 525 to limit the movement of the pressing roller 526 along the width direction of the wiring harness 8 (the second direction X).

[0139] In the above embodiment, the printer 4 includes two printing members 41 arranged opposite to each other along the thickness direction (first direction Y) of the wire harness 8 , and the printing members 41 are used to print logos on both sides of the wire harness 8 along the first direction Y of the thickness direction of the wire harness 8 .

[0140] In this embodiment, please refer to Figure 10As shown, the controller can control two printing members 41 arranged opposite each other along the thickness direction (first direction Y) of the wire harness 8 to simultaneously print a logo on both sides of the wire harness 8 along the thickness direction (first direction Y). On the one hand, this reduces the possibility of misalignment of the printing positions of the logos on both sides of the wire harness 8 along the thickness direction (first direction Y), allowing users to more accurately assemble the wire harness 8. On the other hand, there is no need to set up additional structures to make the wire harness 8 bend and turn twice to achieve the printing of logos on both sides of the wire harness 8. Therefore, the structure of the printing device of the embodiment of the present application is further simplified.

[0141] In another embodiment (not shown in the figures), two or more printing members 41 may be provided on a single side of the wiring harness 8 .

[0142] In the above embodiment, the frame 1 is a frame-type structure with a simple structure, convenient adjustment, and a large space, and can flexibly assemble multiple mechanisms and detectors.

[0143] The use process of the printing device of the embodiment of the present application is as follows:

[0144] Please refer to Figure 1-Figure 2 As shown, the printing device of the embodiment of the present application includes a motion mechanism 2 mounted on a frame 1, and the motion mechanism 2 includes a reeling mechanism 21, a reeling mechanism 22, and a traction mechanism 23. The reeling mechanism 21 releases the wire harness 8, the traction mechanism 23 pulls the wire harness 8, and the reeling mechanism 22 retracts the wire harness 8.

[0145] Please refer to Figure 3-Figure 5 As shown, the printing device of the embodiment of the present application further includes a detector 3 mounted on the frame 1, and the detector 3 includes a color identifier 31, a position detector 32, and a speed detector 33. The wire harness 8 needs to be detected by the detector 3 during its movement from the unwinding mechanism 21 to the printer 4. Specifically, the position detector 32 is used to detect the position signal of the starting end 81 of the wire harness 8, the color identifier 31 is used to identify the color mark 82 of the wire harness 8, thereby detecting whether the wire harness 8 is a good product, and the speed detector 33 is used to detect the movement speed of the wire harness 8. The controller controls the printer 4 to accurately print a mark on the wire harness 8 based on the various signals from the detector 3.

[0146] Please refer to Figure 5-Figure 8 As shown, as the wire harness 8 moves from the unwinding mechanism 21 to the detector 3, it passes through the guide mechanism 5 and the limit mechanism 6. The guide mechanism 5 includes a first guide mechanism 51, and the limit mechanism 6 includes a first limit mechanism 61. The first guide mechanism 51 is used to change the direction of movement L of the wire harness 8, allowing the wire harness 8 to move from the unwinding mechanism 21 to the detector 3, and is also used to maintain the tension of the wire harness 8. The first limit mechanism 61 is used to press the wire harness 8 against the first guide mechanism 51, reducing the possibility of the wire harness 8 escaping from the first guide mechanism 51.

[0147] Please refer to Figure 6 As shown, in the process of moving from the unwinding mechanism 21 to the first material guide mechanism 51, the wire harness 8 needs to pass through the material presence detector 7. The material presence detector 7 detects whether the unwinding mechanism 21 has completely released the wire harness 8 by photoelectric means. When the wire harness 8 has been released, the material presence detector 7 does not receive the reflected light of the wire harness 8, and the material presence detector 7 generates a stop signal. The controller stops the printing device of the embodiment of the present application based on the stop signal, so that the user can replenish a new wire harness 8. The material presence detector 7 can also be used to detect whether the movement trajectory of the wire harness 8 deviates. When the wire harness 8 deviates, the material presence detector 7 does not receive the reflected light of the wire harness 8, and the material presence detector 7 also generates a stop signal. The controller stops the printing device of the embodiment of the present application based on the stop signal.

[0148] Please refer to Figure 10-11 As shown, the material guiding mechanism 5 also includes a second material guiding mechanism 52. When the wire harness 8 moves from the detector 3 to the printer 4, the material guiding member 523 installed on the first material guiding plate 521 in the second material guiding mechanism 52 is used to limit the movement of the wire harness 8 that has not been printed by the printer 4 along the width direction of the wire harness 8 (the second direction X).

[0149] Please refer to Figure 10-11 As shown, in the process of the wire harness 8 moving from the printer 4 to the traction mechanism 23, the guide member 523 installed on the second guide plate 522 in the second guide mechanism 52 is used to limit the movement of the wire harness 8 that has been printed by the printer 4 along the width direction of the wire harness 8 (the second direction X), and the pressing roller 526 in the second guide mechanism 52 is used to limit the movement of the wire harness 8 that has been printed by the printer 4 along the thickness direction of the wire harness 8 (the first direction Y).

[0150] Please refer to Figure 10 As shown, the printing device of the embodiment of the present application further includes a dryer 9 . When the wire harness 8 moves from the printer 4 to the traction mechanism 23 , the dryer 9 is used to quickly dry the markings in the wire harness 8 .

[0151] Please refer to Figure 9 As shown, the wire harness 8 with the printed mark is then pulled by the pulling mechanism 23, and the pulled wire harness 8 can be directly Figure 1 The winding mechanism 22 shown is retracted, or the wire harness 8 may pass through other first material guiding mechanisms 51 before being retracted by the winding mechanism 22 to change the movement direction L of the wire harness 8.

[0152] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A printing device for printing a mark on a wire harness, characterized in that: The printing device comprises: Frame (1); An unwinding mechanism (21), mounted on the frame (1), for releasing the wire harness (8); A reeling mechanism (22) mounted on the frame (1) and used for retrieving the wire harness (8); A color identifier (31) is mounted on the frame (1) and is used to identify the color mark (82) of the wiring harness (8) to determine whether the wiring harness (8) is a good product; A positioning detector (32) mounted on the frame (1) and used to detect the position of the starting end (81) of the wiring harness (8); A speed detector (33) is mounted on the frame (1), wherein the speed detector (33) includes a rotation speed detection shaft (331a); A printer (4) is mounted on the frame (1); a first material guiding mechanism (51), the first material guiding mechanism (51) comprising a first rotating wheel (511), the first rotating wheel (511) being in transmission connection with the speed detection shaft (331a), the first rotating wheel (511) being used to abut against the wire harness (8), the first rotating wheel (511) being used to change the movement direction of the wire harness (8), and the first rotating wheel (511) being capable of rotating under the drive of the wire harness (8), and the rotating first rotating wheel (511) being capable of driving the speed detection shaft (331a) to rotate, so that the speed detector (33) detects the movement speed of the wire harness (8); a first limiting mechanism (61), the first limiting mechanism (61) comprising a second rotating wheel (611), a first connecting rod (612) and a first elastic member (613) in a compressed state, the first connecting rod (612) being rotatably connected to the frame (1), the first connecting rod (612) also being rotatably connected to the second rotating wheel (611), one end of the first elastic member (613) being connected to the frame (1), the other end of the first elastic member (613) being connected to the first connecting rod (612), under the elastic force of the first elastic member (613), the first connecting rod (612) drives the second rotating wheel (611) to press the wiring harness (8) against the first rotating wheel (511) to limit the wiring harness (8) from being separated from the first rotating wheel (511), and the second rotating wheel (611) can also be separated from the first rotating wheel (511) to allow the wiring harness (8) to pass between the second rotating wheel (611) and the first rotating wheel (511); The controller controls the printer (4) to print a mark on the wire harness identified as a good product based on the printable signal detected by the color identifier, the position signal detected by the positioning detector (32), and the motion speed signal detected by the speed detector (33).

2. The printing device according to claim 1, characterized in that: The first limiting mechanism (61) further comprises a cam (615a), the cam (615a) being rotatably connected to the frame (1), and the rim of the cam (615a) abutting against the first connecting rod (612); The rotated cam (615a) is used to push the first connecting rod (612) to rotate relative to the frame (1), so as to drive the second rotating wheel (611) to disengage from the first rotating wheel (511).

3. The printing device according to claim 1 or 2, characterized in that: The unwinding mechanism (21) comprises a discharge tray (211) and a first motor connected to each other, wherein the first motor drives the discharge tray (211) to rotate to release the wire harness (8); The controller controls the first motor according to the torque signal of the first motor, and controls the first motor to drive the discharge tray (211) to rotate in the opposite direction when the torque of the first motor is less than a set safety value, so as to pull back the wire harness (8) so that the wire harness (8) remains in a tensioned state.

4. The printing device according to claim 1 or 2, characterized in that: The printing device further comprises a traction mechanism (23), the traction mechanism (23) comprising a second motor and a third rotating wheel (231) connected to each other, the third rotating wheel (231) being used for abutting against the wire harness (8); The printing device further comprises a second limiting mechanism (62), the second limiting mechanism (62) comprising a fourth rotating wheel (621), the fourth rotating wheel (621) being used to press the wire harness (8) against the third rotating wheel (231) to limit the wire harness (8) from separating from the third rotating wheel (231); The second motor drives the third rotating wheel (231) to rotate, and is used to pull the wiring harness (8).

5. The printing device according to claim 1 or 2, characterized in that: The printing device further comprises a limiting wheel (311), and the limiting wheel (311) is rotatably connected to the frame (1); The limiting wheel (311) is used to abut against the wire harness (8) to limit the movement of the wire harness (8) located in the detection area of ​​the color identifier (31) relative to the color identifier (31) along a first direction.

6. The printing device according to claim 1 or 2, characterized in that: The printing device further includes a second material guiding mechanism (52), the second material guiding mechanism (52) including a first material guiding plate (521), a second material guiding plate (522) and a material guiding member (523), the first material guiding plate (521) and the second material guiding plate (522) are both mounted on the frame (1) and are both provided with a first slide groove (524), and the material guiding member (523) is passed through the first slide groove (524); The first guide plate (521) is used to abut against the wire harness (8) before being spray-printed, and the second guide plate (522) is used to abut against the wire harness (8) after being spray-printed; The material guide (523) is capable of sliding in the first slide groove (524), and the material guide (523) is used to limit the movement of the wire harness (8) relative to the printer (4) along the second direction.

7. The printing device according to claim 6, characterized in that: The first material guide plate (521) and the second material guide plate (522) are both metal plates, and the material guide member (523) is provided with a magnetic attraction portion (523a), and the magnetic attraction portion (523a) is magnetically attracted to the metal plate; Alternatively, the first material guide plate (521) and the second material guide plate (522) are both provided with a magnetic matching portion, the material guide member (523) is provided with a magnetic attraction portion (523a), and the magnetic matching portion is magnetically attracted to the magnetic attraction portion (523a).

8. The printing device according to claim 6, characterized in that: The second material guide plate (522) is provided with a recessed portion (522a), and the space within the recessed portion (522a) is used to avoid the marking of the wiring harness (8).

9. The printing device according to claim 6, characterized in that: The second material guiding mechanism (52) further includes a bracket (525) and a pressing roller (526); The bracket (525) is mounted on the second material guide plate (522), the bracket (525) is provided with a second slide groove (525a) extending along the first direction, and the pressing roller (526) is passed through the second slide groove (525a); The pressing roller (526) is used to press at least part of the two ends of the wire harness (8) along the second direction to the second guide plate (522) to limit the movement of the printed wire harness (8) relative to the printer (4) along the first direction, and there is a spacing space between at least part of the pressing roller (526) and the second guide plate (522), and the spacing space is used for the marking of the wire harness (8) to pass through.

10. The printing device according to claim 9, characterized in that: The pressing roller (526) comprises a pressing section (526a), a connecting section (526b) and a sliding section (526c); Both ends of the connecting section (526b) are connected to the pressing section (526a) respectively, and one end of the pressing section (526a) facing away from the connecting section (526b) is connected to the sliding section (526c), and at least a portion of the sliding section (526c) is located in the second sliding groove (525a); The pressing section (526a) is used to abut against at least part of the two sides of the wire harness (8) along the second direction, and there is a spacing space between the connecting section (526b) and the second guide plate (522), and the spacing space is used for the identification of the wire harness (8) to pass through.

11. The printing device according to claim 1 or 2, characterized in that: The printer (4) comprises two printing parts (41) arranged opposite to each other along a first direction, and the printing parts (41) are used to print identification marks on both sides of the wiring harness (8) along the first direction.

Images