Gearbox driven printing press ink fountain

Abstract

The utility model discloses a printing machine ink fountain driven by gear box, including clavicyathic steel plate ink key and the ink fountain roller of setting at its front end, and the ink fountain roller and ink key front end form the ink outlet gap between. Every ink key is equipped with ink outlet adjusting mechanism, and the adjusting mechanism is by drive motor, gear box, cam assembly and adjusting top piece, and the cam assembly is worm line cam or eccentric wheel, and drives adjusting top piece linear reciprocating motion to adjust ink outlet gap. The ink key lower surface located at the rear end of the slit's both sides is equipped with arc back adhesive groove and inserts adhesive tape to guarantee the sealing and avoid ink leakage to ink outlet adjusting mechanism. This structure has realized the high accuracy control of ink outlet amount, avoided the ink seepage failure, improved the stability and printing quality, and is convenient for maintenance cleaning.

Description

Technical Field

[0001] This utility model relates to ink fountains for printing presses, specifically to a gearbox-driven ink fountain for printing presses. Background Technology

[0002] Existing printing press ink fountains mostly use a single slider, key, or eccentric wheel adjustment mechanism to control the gap between the ink key and the ink fountain roller. While this type of structure can achieve basic ink output control, it still has the following shortcomings:

[0003] 1) Insufficient ink control accuracy:

[0004] Traditional eccentric wheel or worm gear transmission structures have gaps and cumulative errors during operation, and the displacement of the adjusting top block cannot be controlled at the micrometer level, resulting in uneven ink output control and affecting printing quality.

[0005] 2) Insufficient ink control uniformity:

[0006] Due to excessive friction on the contact surface or insufficient transmission precision, the movement of the ink keys is not smooth enough, resulting in excessive or insufficient ink output in certain areas, which makes it difficult to meet the requirements of high-quality printing. Utility Model Content

[0007] This invention provides a gearbox-driven ink fountain for a printing press. The ink fountain is equipped with piano-key type steel plate ink keys. Several slits are provided on the front side of each piano-key type steel plate ink key to form several ink dispensing keys. An ink fountain roller is provided at the top front end of each ink dispensing key. The gap between the ink fountain roller and the front end of the ink dispensing key 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.

[0008] The ink output adjustment mechanism includes a drive motor, a gearbox, a cam assembly, and an adjustment block. The drive motor is connected to the cam assembly through the gearbox. The cam assembly is a worm-shaped cam or an eccentric wheel, which is mounted on the output shaft of the gearbox. The two ends of the adjustment block abut against the outer diameter of the cam assembly and the lower surface of the ink output key, respectively. Ball bearings that roll in cooperation with the cam assembly and the ink output key are embedded at both ends of the adjustment block. The cam assembly drives the adjustment block to make linear reciprocating motion, thereby adjusting the size of the gap.

[0009] Furthermore, the lower surface of the ink output keys located on both sides of the rear end of the cut is provided with an arc-shaped adhesive groove, and an adhesive strip is provided in the adhesive groove.

[0010] Furthermore, the kerf width is 0.2 mm.

[0011] Furthermore, the ink output adjustment mechanism is also equipped with a housing, in which the drive motor, gearbox, cam assembly, and adjustment top block are all installed. An ink cartridge is detachably installed on the front side of the housing.

[0012] Furthermore, the worm-shaped cam consists of a plane and a helical surface. The plane serves as the cam reference surface, and the helical surface gradually extends along one end of the plane to form a helical lead surface. When the adjusting top block abuts against the helical surface, the worm-shaped cam rotates 1 degree, causing the adjusting top block to move linearly by 0.004 mm.

[0013] Furthermore, the spiral cam is manufactured by CNC wire cutting, and the spiral lead error is less than 0.01mm.

[0014] The technical advantages of this utility model are as follows:

[0015] 1) High ink control precision: The worm gear cam is driven by a gearbox, and the linear displacement of the top block can be 0.004mm for every 1° rotation. Combined with the ball point contact method, it can achieve high-precision fine adjustment of the ink outlet gap.

[0016] 2) Precise Installation and Positioning: The plane set by the worm-shaped cam serves as a reference surface, ensuring that all adjusting blocks are in their lowest position during installation, allowing the ink outlet key to be in its natural state. This facilitates uniform positioning of the gap between the ink outlet key and the ink fountain roller, thereby improving assembly accuracy and consistency and preventing uneven ink control caused by installation errors. Furthermore, the worm-shaped cam is CNC wire-cut, with a lead error of less than 0.01mm, guaranteeing stability and consistency.

[0017] 3) Good sealing effect: An arc-shaped adhesive groove with embedded adhesive strip is set below the ink output key, which can effectively prevent ink from seeping into the transmission mechanism and avoid malfunction of the adjustment mechanism.

[0018] 4) Uniform ink control: The piano key-type steel plate ink keys and ink fountain roller are combined with ball bearing auxiliary motion to ensure uniform and stable ink output and improve printing quality. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a schematic diagram illustrating the structural principle of a gearbox-driven ink fountain in a printing press according to this utility model.

[0021] Figure 2 A plan view of a piano-key style steel plate ink key;

[0022] Figure 3 A cross-sectional view of the rear end of a section of a piano key-type steel plate ink key;

[0023] Figure 4 This is a cross-sectional view of a spiral cam.

[0024] Figure 5 A three-dimensional view of a spiral cam;

[0025] Figure 6 This is a schematic diagram of an adjusting top block with steel balls embedded at both ends. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] Reference Figure 1-3 As shown, this utility model provides a gearbox-driven printing press ink fountain 100. The printing press ink fountain is provided with a piano key-type steel plate ink key 110. The front side of the piano key-type steel plate ink key 110 is provided with a plurality of slits 111 to form a plurality of ink outlet keys 112. Preferably, the width of the slits 111 is 0.2mm. Figure 3 for Figure 2 The cross-sectional view of the cut at point B in the direction A shows that the lower surface of the ink outlet key 112 located on both sides of the cut 111 is provided with an arc-shaped adhesive groove. An adhesive strip 113 is provided in the adhesive groove to seal the ink and prevent it from leaking into the transmission mechanism, thus avoiding the ink outlet adjustment mechanism 200 from malfunctioning due to ink ingress.

[0029] An ink fountain roller 120 is provided at the top front end of each ink outlet key 112, and the gap between the ink fountain roller 120 and the front end of the ink outlet key 112 serves as the ink outlet area (e.g., Figure 1 Each ink output key 112 is equipped with an ink output adjustment mechanism 200 to adjust the gap size.

[0030] Continue reading Figure 1 The ink output adjustment mechanism 200 is equipped with a drive motor 210, a gearbox 220, a cam assembly 230, and an adjustment top block 240. The servo drive motor 210 outputs power to the gearbox 220, and the speed is reduced and the torque is increased through multi-stage gear meshing, which meets the force control requirements for precise ink control.

[0031] The cam assembly 230 is a spiral cam 231, mounted on the gearbox output shaft 221. The adjusting block 240 abuts against the outer diameter of the cam assembly 230 and the lower surface of the ink output key 112 at both ends. Ball bearings 241, which roll in cooperation with the cam assembly 230 and the ink output key 112, are embedded at both ends of the adjusting block 240. The cam assembly 230 drives the adjusting block 240 to perform linear reciprocating motion, thereby adjusting the gap size. The steel balls embedded at both ends of the adjusting block 240 ensure that the contact between the two ends and the ink output key 112 and the cam assembly 230 remains at a single point, while also making the cooperation between the two ends of the adjusting block 240 and the ink output key 112 and the cam assembly 230 smoother.

[0032] The worm-shaped cam 231 has a shaped hole 234 at its center for fixed connection with the gearbox output shaft 221.

[0033] In an optional embodiment, the ink output adjustment mechanism 200 is further provided with a housing 250, and the drive motor 210, gearbox 220, cam assembly 230 and adjustment top block 240 are all installed inside the housing 250. An ink cartridge 251 is detachably installed on the front side of the housing 250.

[0034] In an alternative embodiment, such as Figure 4-5 As shown, the worm-shaped cam 231 consists of a plane 232 and a helical surface 233. The plane 232 serves as the cam reference plane, and the helical surface 233 gradually extends along one end of the plane 232 to form a helical lead surface. When the adjusting top block 240 abuts against the helical surface 233, the worm-shaped cam 231 rotates 1 degree, causing the adjusting top block 240 to move linearly by 0.004 mm.

[0035] The plane 232 set by the worm-shaped cam 231 is used as a reference during installation. All the adjusting top blocks 240 are in the lowest position to ensure that there is a gap between the upper end face of the adjusting top block 240 and the ink outlet key 112. When the ink outlet key 112 is in the natural state, the gap between the ink outlet key 112 and the ink fountain roller 120 is positioned.

[0036] In an optional embodiment, the spiral cam 231 is manufactured by CNC wire cutting, and the spiral lead error is less than 0.01 mm.

[0037] 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 gearbox-driven ink fountain for a printing press, wherein the ink fountain is provided with piano-key type steel plate ink keys, the front side of which has several slits to form several ink dispensing keys, an ink fountain roller is provided at the top front end of each ink dispensing key, the gap between the ink fountain roller and the front end of the ink dispensing key serves as an 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... The ink output adjustment mechanism includes a drive motor, a gearbox, a cam assembly, and an adjustment block. The drive motor is connected to the cam assembly through the gearbox. The cam assembly is a worm-shaped cam or an eccentric wheel, which is mounted on the output shaft of the gearbox. The two ends of the adjustment block abut against the outer diameter of the cam assembly and the lower surface of the ink output key, respectively. Ball bearings that roll in cooperation with the cam assembly and the ink output key are embedded at both ends of the adjustment block. The cam assembly drives the adjustment block to make linear reciprocating motion, thereby adjusting the size of the gap.

2. A gear box driven printing press ink fountain as claimed in claim 1, wherein, The lower surface of the ink output keys located on both sides of the rear end of the cut is provided with an arc-shaped adhesive groove, and an adhesive strip is provided in the adhesive groove.

3. A gear box driven printer inker as claimed in claim 1 wherein, The kerf width is 0.2mm.

4. A gear box driven printer inker as claimed in claim 1 wherein, The ink output adjustment mechanism also has a housing, in which the drive motor, gearbox, cam assembly, and adjustment top block are all installed. An ink cartridge can be detachably installed on the front side of the housing.

5. The gearbox-driven ink fountain for a printing press as described in claim 1, characterized in that, The worm-shaped cam consists of a plane and a helical surface. The plane serves as the cam reference plane, and the helical surface gradually extends along one end of the plane to form a helical lead surface. When the adjusting top block abuts against the helical surface, the worm-shaped cam rotates 1 degree, causing the adjusting top block to move linearly by 0.004 mm.

6. A gear box driven printer inker as claimed in claim 5 wherein, The spiral cam is manufactured by CNC wire cutting, and the spiral lead error is less than 0.01mm.

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