Modular ink fountain device for a rotary linear conversion mechanism

Abstract

The utility model relates to the field of printing machine ink fountain, disclose a modularization ink fountain device of rotary linear conversion mechanism, including ink fountain pedestal, ink fountain roller, ink key and ink adjustment mechanism. The guide rail is established to ink fountain pedestal, and the ink key is slidably installed in the guide rail, and the nut column of embedded self -lubricating or ball nut is rotationally assembled on it. Ink adjustment mechanism contains drive motor, gear box and output shaft, and the motor drives the output shaft to rotate through the gear box, and the rotary motion is converted into the linear sliding of ink key through the thread cooperation of output shaft and nut column, and the size of the ink area gap is adjusted. The utility model solves the problem of high processing and assembly requirement, easy to jam, transmission failure caused by ink penetration and high maintenance cost of existing ink fountain, and improves the adjustment precision and stability.

Description

Technical Field

[0001] This utility model relates to ink fountains for printing presses, specifically to a modular ink fountain device with a rotary-to-linear conversion mechanism. Background Technology

[0002] There are three main methods for adjusting the ink volume of the ink fountain in existing printing presses:

[0003] 1. Slider type ink key: The gap between the ink key and the ink fountain roller is adjusted by the linear motion of a single ink key slider.

[0004] 2. Piano key type steel plate ink key: The gap is adjusted by moving the ink key (usually in the form of a steel plate) up and down through worm gear-eccentric wheel transmission.

[0005] 3. Eccentric wheel type ink key: The ink key is directly driven by the rotation of the eccentric wheel, changing the gap between it and the ink fountain roller.

[0006] (2) Problems or shortcomings of existing technology

[0007] Existing technologies, especially slider-type ink key structures, generally suffer from the following significant problems:

[0008] 1. Extremely high precision requirements for machining and assembly, making maintenance difficult: The clearance between ink keys is extremely small (typically only 0.008mm), and they are directly installed on the ink fountain base, requiring precise manual adjustment and positioning, which is difficult for non-professionals to complete. When a single ink key is damaged, because they are tightly fitted together, they need to be disassembled and replaced in pairs or even as a group, resulting in extremely low maintenance efficiency.

[0009] 2. High resistance to movement, prone to jamming: The ink keys have a large contact area and high resistance to movement. Furthermore, adjacent ink keys are prone to interference due to mechanical stress or minor deformation during frequent adjustments. Ink penetration into the friction surface further intensifies friction, easily leading to ink key jamming or even complete seizure.

[0010] 3. Ink penetration leading to transmission mechanism failure: The existing structure lacks an effective dynamic seal, making it extremely easy for ink to penetrate into the ink key slider transmission mechanism. Long-term accumulation and hardening of the penetrated ink significantly increases motion resistance, ultimately causing the drive motor to stall or overload and become damaged, forming a vicious cycle of "ink penetration - scaling - increased resistance - jamming - motor burnout".

[0011] 4. Complex structure, high maintenance cost and long cycle: The overall structure is complex. After ink contamination, the transmission mechanism often needs to be completely disassembled and sent back to the factory for cleaning and repair. This requires high technical skills from on-site maintenance personnel, results in long equipment downtime and high maintenance costs. Utility Model Content

[0012] To address the shortcomings described above, this utility model provides a modular ink fountain device with a rotary-to-linear conversion mechanism. It aims to solve problems associated with existing ink fountain devices, such as high precision requirements for machining and assembly, difficult maintenance, high resistance leading to jamming, ink penetration causing transmission mechanism failure, and complex structure resulting in high maintenance costs and long repair cycles. This device achieves precise linear sliding adjustment of the ink dispensing key through a unique rotary-to-linear conversion mechanism design. To achieve the above objectives, the technical solution of this utility model is as follows:

[0013] A modular ink fountain device with a rotary-to-linear conversion mechanism includes an ink fountain base and an ink fountain roller fixedly installed on one side of the ink fountain base. An ink dispensing key is installed on the ink fountain base, and the gap between the front end of the ink dispensing key and the ink fountain roller serves as the ink dispensing area. Each ink dispensing key is equipped with an ink dispensing adjustment mechanism to adjust the size of the gap.

[0014] A guide rail is fixedly installed on the ink fountain base, the ink dispensing key is slidably installed on the guide rail, and a nut column is rotatably installed on the ink dispensing key;

[0015] The ink output adjustment mechanism includes a drive motor, a gearbox, and an output shaft. The drive motor is connected to the output shaft via the gearbox. The axial direction of the output shaft is consistent with the sliding direction of the ink output key. One end of the output shaft passes through a nut post and is threadedly connected to the nut post. The drive motor drives the output shaft to rotate via the gearbox. The rotation of the output shaft is converted into the sliding of the ink output key through the nut post to adjust the ink output volume.

[0016] Furthermore, the upper surface of the front end of the ink output key is provided with a shallow groove and the shallow groove is filled with grease.

[0017] Furthermore, the guide rail has a dovetail or T-groove structure.

[0018] Furthermore, the nut post is embedded with a ball nut, and the corresponding section of the output shaft is provided with a ball thread.

[0019] Furthermore, the drive motor is a stepper motor or a servo motor, and a position sensor is integrated inside the gearbox.

[0020] Furthermore, an ink level sensor is fixedly installed on the ink fountain base, and the ink level sensor is connected to the control system signal of all drive motors.

[0021] Furthermore, an ink cartridge is installed on the ink fountain base.

[0022] The advantages of this utility model are:

[0023] 1) High adjustment accuracy: The drive motor adopts a stepper / servo motor, the gearbox integrates a position sensor, and with the threaded transmission of the output shaft and nut column, the ink output adjustment accuracy can be greatly improved.

[0024] 2) Anti-jamming: The ink output key is slidably installed on the dovetail / T-shaped groove guide rail. Compared with the existing ink keys, the large contact area significantly reduces the movement resistance and avoids jamming problems caused by interference between adjacent ink keys or increased friction of ink.

[0025] 3) Prevent ink penetration failure: The shallow groove at the front end of the ink outlet key is filled with grease to form a dynamic seal, preventing ink from penetrating into the transmission mechanism and avoiding ink scaling that increases resistance and causes the motor to stall.

[0026] 4) Easy maintenance and low cost: Each ink output key is independently equipped with an ink output adjustment mechanism, eliminating the need for disassembly in pairs / groups as in existing technologies; and eliminating the need to disassemble the entire transmission mechanism and return it to the factory for repair, reducing the technical requirements for personnel, shortening equipment downtime, and reducing maintenance costs.

[0027] 5) Intelligent adaptation and good cleanability: The ink level sensor is linked with the drive motor control system, which can automatically adjust the initial position of the ink dispensing key according to the amount of ink in the ink fountain; the ink fountain base is equipped with an ink collection box to collect leaked ink and keep the equipment clean. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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] Figure 1 This is a structural diagram of the ink fountain base of a modular ink fountain device with a rotary-linear conversion mechanism according to this utility model;

[0030] Figure 2 for Figure 1 Sectional view along the AA direction;

[0031] Figure 3 This is a schematic diagram of the ink line base from another perspective;

[0032] Figure 4 for Figure 3 Enlarged view of part B in the middle;

[0033] Figure 5 for Figure 2 A schematic diagram of the guide rail in the C direction. Detailed Implementation

[0034] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0035] To fully understand this utility model, detailed steps and structures will be presented in the following description to illustrate the technical solution of this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0036] Reference Figure 1-5 As shown, this utility model provides a modular ink fountain device with a rotary linear conversion mechanism, including an ink fountain base 1 and an ink fountain roller 2 fixedly installed on one side of the ink fountain base 1. An ink dispensing key 3 is installed on the ink fountain base 1. The gap between the front end of the ink dispensing key 3 and the ink fountain roller 2 serves as the ink dispensing area. The top of the ink dispensing key 3 is the ink storage area. Each ink dispensing key 3 is equipped with an ink dispensing adjustment mechanism 4 to adjust the gap size.

[0037] A guide rail 11 is fixedly installed on the ink fountain base 1. The ink dispensing key 3 is slidably installed on the guide rail 11, and a nut column 31 is rotatably installed on the ink dispensing key 3. The ink dispensing adjustment mechanism 4 includes a drive motor 41, a gearbox 42, and an output shaft 43. The drive motor 41 is connected to the output shaft 43 through the gearbox 42. The axial direction of the output shaft 43 is consistent with the sliding direction of the ink dispensing key 3. One end of the output shaft 43 passes through the nut column 31 and is threadedly connected to the nut column 31. The drive motor 41 drives the output shaft 43 to rotate through the gearbox 42. The rotation of the output shaft 43 is converted into the sliding of the ink dispensing key 3 through the nut column 31 to adjust the ink dispensing volume.

[0038] In one optional embodiment, the upper surface of the front end of the ink output key 3 is provided with a shallow groove and the shallow groove is filled with grease 5. In another embodiment, in addition to opening a groove at the front end of the ink key and filling it with grease, a "lip seal" or "O-ring" can also be installed in the sealing groove.

[0039] In an optional embodiment, the guide rail 11 has a dovetail or T-groove structure. In addition to standard linear guide rail sliders (such as ball guides), guide support structures such as linear sliding bearings (such as DU bearings), cross roller guides, or air-bearing guides can also be used to provide high-precision linear guidance for the ink output key 3.

[0040] In an optional embodiment, the nut post 31 is an independent cylindrical component. One end of the nut post 31 has an internal thread (preferably M5×0.5) machined at its center to mate with the external thread of the output shaft 43, and the other end has a smooth outer circular surface that is rotatably connected to the ink output key 3. The nut post 31 is screwed onto the end of the output shaft via the internal thread. This achieves a rotatable connection between the nut post 31 and the ink output key 3, while maintaining a fixed axial connection between the two.

[0041] In a preferred embodiment, a ball nut is embedded in the nut post 31, and a ball thread is provided on the corresponding section of the output shaft 43, thereby improving the smoothness of rotation between the nut post 31 and the output shaft 43.

[0042] In an optional embodiment, the drive motor 41 is a stepper motor or a servo motor, and the gearbox 42 integrates a position sensor. The position sensor is electrically connected to the drive motor to achieve closed-loop control, ensuring that the ink output adjustment accuracy of each ink output key is ≤0.01mm.

[0043] In an optional embodiment, an ink level sensor is also fixedly installed on the ink fountain base 1. The ink level sensor is connected to the control system signal of all drive motors 41 and is used to automatically adjust the initial position of the ink dispensing key according to the amount of ink in the ink fountain.

[0044] In an optional embodiment, an ink collection box 12 is installed on the ink fountain base 1. The ink collection box 12 is located below the ink dispensing key 3 and is used to collect dripping ink to prevent ink from dripping and contaminating the equipment, while also facilitating centralized recycling and reuse.

[0045] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A modular ink fountain device with a rotary-to-linear conversion mechanism, comprising an ink fountain base and an ink fountain roller fixedly mounted on one side of the ink fountain base, wherein an ink dispensing key is installed on the ink fountain base, the gap between the front end of the ink dispensing key and the ink fountain roller serves as the ink dispensing area, and each ink dispensing key is equipped with an ink dispensing adjustment mechanism for adjusting the size of the gap, characterized in that, A guide rail is fixedly installed on the ink fountain base, the ink dispensing key is slidably installed on the guide rail, and a nut column is rotatably installed on the ink dispensing key; The ink output adjustment mechanism includes a drive motor, a gearbox, and an output shaft. The drive motor is connected to the output shaft via the gearbox. The axial direction of the output shaft is consistent with the sliding direction of the ink output key. One end of the output shaft passes through a nut post and is threadedly connected to the nut post. The drive motor drives the output shaft to rotate via the gearbox. The rotation of the output shaft is converted into the sliding of the ink output key through the nut post to adjust the ink output volume.

2. The modular ink fountain device of the rotary-linear conversion mechanism as described in claim 1, characterized in that, The upper surface of the front end of the ink output key is provided with a shallow groove, which is filled with grease.

3. The modular ink fountain device of the rotary-linear conversion mechanism as described in claim 1, characterized in that, The guide rail has a dovetail or T-groove structure.

4. The modular ink fountain device of the rotary-linear conversion mechanism as described in claim 1, characterized in that, The nut column is fitted with a ball nut, and the corresponding section of the output shaft is provided with a ball thread.

5. The modular ink fountain device of the rotary-linear conversion mechanism as described in claim 1, characterized in that, The drive motor is a stepper motor or a servo motor, and a position sensor is integrated inside the gearbox.

6. The modular ink fountain device of the rotary-linear conversion mechanism as described in claim 1, characterized in that, An ink level sensor is also fixedly installed on the ink fountain base, and the ink level sensor is connected to the control system signal of all drive motors.

7. The modular ink fountain device of the rotary-linear conversion mechanism as described in claim 1, characterized in that, An ink cartridge is installed on the ink fountain base.

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