High-precision coating flat belt driving device

Abstract

The utility model discloses a kind of flat belt driving devices for high-precision coating, belong to coating equipment technical field;The device aims at solving the periodic error and vibration of traditional gear, synchronous belt transmission exist, resulting in the problem of coating quality decline, it includes servo motor, driving wheel, suction roll, flat belt and rotation-stopping mechanism, the suction roll is coaxially constituted by rotatable outer cylinder and fixed inner cylinder by bearing, outer cylinder wall is equipped with suction micropore, inner cylinder is equipped with negative pressure interface, servo motor is installed on equipment rack by motor base, its output shaft is connected driving wheel, flat belt is closely encircled on driving wheel and suction roll outer cylinder, power transmission is relied on friction, rotation-stopping mechanism is used for fixed suction roll inner cylinder, prevent its rotation;The utility model replaces meshing transmission by flat belt friction transmission, completely eliminates periodic motion fluctuation, realizes super flat steady power transmission, effectively isolates motor vibration, thereby significantly improve the uniformity of coating layer and product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of roll material processing and coating equipment, and in particular to a transmission device for high-precision coating machines, such as optical film and lithium battery electrode coating equipment, specifically a flat belt transmission device that can achieve ultra-smooth and vibration-free transmission. Background Technology

[0002] In high-precision coating processes, the relative motion stability between the coating head (such as a comma doctor blade, micro-gravure roller, etc.) and the roller that carries and transports the substrate (such as PET film, copper foil, aluminum foil) directly determines the uniformity of the coating thickness. Any tiny, periodic speed fluctuations or vibrations will form visible stripes, lines, or uneven thickness on the coating, leading to a decrease in product yield. Currently, the mainstream solution for driving such rollers is to use a servo motor in conjunction with a synchronous belt or gear for transmission. However, these two transmission methods have inherent technical drawbacks: 1. Periodic error: The "polygonal effect" of synchronous belt drive and the "backlash" and meshing error of gear drive will introduce periodic angular velocity fluctuations. Although these fluctuations are small, they are unacceptable in high-precision coating. 2. Vibration and noise: The meshing impact between teeth will generate vibration and noise. These vibrations will be directly transmitted to the coating area through the transmission system, interfering with the stability of the coating process. 3. Maintenance requirements: Both the timing belt and gears are subject to wear and tear, requiring regular inspection and replacement to ensure transmission accuracy; Therefore, there is an urgent need in this field for a new transmission solution that can achieve near-perfect smooth transmission while also possessing reasonable cost and reliability. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-precision flat belt drive device for coating, so as to solve the problems of periodic speed fluctuations, vibration transmission and coating quality defects caused by traditional synchronous belt and gear transmission methods.

[0004] To achieve the above objectives, this utility model provides a high-precision coating flat belt drive device, which includes a servo motor, a drive pulley, a driven pulley, an adsorption roller, and a flat belt. The servo motor is fixedly mounted on the equipment frame via a motor mount. The drive pulley is fixedly mounted on the output shaft of the servo motor. The adsorption roller has a hollow inner cavity, and both ends of the adsorption roller are respectively mounted on the equipment frame with bearing seats. The roller surface of the adsorption roller has several adsorption micropores, which communicate with the hollow inner cavity. A transmission tube extends outward from one end of the adsorption roller, and the outer end of the transmission tube is connected to a negative pressure rotary joint. The inner end of the transmission tube communicates with the hollow inner cavity. The driven pulley is fixed to the transmission tube, and the drive pulley and the driven pulley are connected by a synchronous belt. The flat belt is a seamless annular belt that tightly wraps around the two adsorption rollers.

[0005] Furthermore, this utility model provides a high-precision coating flat belt drive device, wherein the flat belt is made of polyurethane material or fiber-reinforced composite material with low elongation and high coefficient of friction.

[0006] Furthermore, this utility model provides a high-precision coating flat belt drive device, wherein the outer circumferential surfaces of the driving wheel and the driven wheel are provided with coatings or textures to increase friction.

[0007] Furthermore, this utility model provides a high-precision coating flat belt drive device, wherein the device further includes a tensioning mechanism for adjusting the tension of the synchronous belt.

[0008] Furthermore, this utility model provides a high-precision coating flat belt drive device, wherein the tensioning mechanism is a tensioning wheel, which presses against the non-working surface of the synchronous belt, and its wheel seat is adjustablely mounted on the equipment frame.

[0009] Furthermore, this utility model provides a high-precision coating flat belt drive device, wherein the servo motor is an AC servo motor.

[0010] The high-precision flat belt drive device for coating disclosed in this application has the following advantages compared with the prior art: 1. Extremely smooth transmission: The flat belt continuous friction transmission fundamentally eliminates the inherent periodic fluctuations of gears and synchronous belts, making the rotation speed of the adsorption roller extremely uniform and continuous, providing an ideal motion reference for high-precision coating, and eliminating coating streaks caused by the transmission system from the source. 2. Effective vibration isolation: The servo motor is installed independently. When the slight vibration of the servo motor is transmitted through the flexible medium of the synchronous belt, it will be effectively attenuated and absorbed, making it difficult to be transmitted to the adsorption roller and sensitive substrate. This forms a natural vibration isolation layer, which improves the quietness and stability of the coating process. 3. Reliable structure and easy maintenance: Compared with direct drive, this solution has a simpler structure, lower cost, and less stringent requirements for installation accuracy. Compared with synchronous belts and gears, flat belts and friction drives have more uniform wear, longer lifespan, and longer maintenance cycles. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a high-precision coating flat belt drive device according to the present invention.

[0012] The components include: 1. Servo motor; 2. Drive wheel; 3. Driven wheel; 4. Adsorption roller; 5. Flat belt; 6. Tensioner; 7. Adsorption micropores; 8. Transmission tube; 9. Negative pressure rotary joint; 10. Synchronous belt. Detailed Implementation

[0013] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0014] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0016] like Figure 1 As shown, this embodiment provides a high-precision coating flat belt drive device, which includes a servo motor 1, a drive pulley 2, a driven pulley 3, an adsorption roller 4, and a flat belt 5. The servo motor 1 is fixedly mounted on the equipment frame via a motor mount, and the servo motor 1 is an AC servo motor. The drive pulley 2 is fixedly mounted on the output shaft of the servo motor 1. The adsorption roller 4 has a hollow inner cavity, and both ends of the adsorption roller 4 are respectively mounted on the equipment frame with bearing seats. The roller surface of the adsorption roller 4 has a plurality of adsorption micropores 7, and the adsorption micropores 7 are connected to the hollow inner cavity. One end of the adsorption roller 4 extends outward with a transmission tube 8, and the outer end of the transmission tube 8 is connected to a negative pressure rotary joint 9. The inner end of the transmission tube 8 and the hollow inner cavity are connected to the negative pressure rotary joint 9. The cavity is connected, the driven wheel 3 is fixed to the transmission tube 8, and the driving wheel 2 and the driven wheel 3 are connected by a synchronous belt 10. In order to enhance the friction, the outer circumferential surfaces of the driving wheel 2 and the driven wheel 3 are provided with a coating or texture to increase the friction. The flat belt 5 is a seamless annular belt that tightly wraps around the two adsorption rollers 4. The flat belt 5 is made of polyurethane material or fiber-reinforced composite material with low elongation and high friction coefficient. In order to prevent the synchronous belt 10 from loosening, this embodiment also adds a tensioning mechanism to adjust the tension of the synchronous belt 10. The tensioning mechanism is a tensioning wheel 6, which presses against the non-working surface of the synchronous belt 10, and its wheel seat position is adjustablely mounted on the equipment frame.

[0017] The working process and principle of a high-precision coating flat belt drive device 5 provided in this embodiment are as follows: At the start of the coating operation, the vacuum system is activated first. Negative pressure is applied sequentially to the substrate on the surface of the adsorption roller 4 through the negative pressure rotary joint 9, transmission tube 8, hollow inner cavity, and adsorption micropores 7. The substrate (such as a film) is adsorbed and adheres tightly to the surface of the adsorption roller 4. Then, the servo motor 1 is started, driving the drive wheel 2 to rotate. The drive wheel 2 drives the synchronous belt 10 to move through friction. The synchronous belt 10 drives the driven wheel 3 to rotate. The driven wheel 3 is fixedly installed on the transmission tube 8, and the transmission tube 8 rotates accordingly. At this time, the rotating end of the negative pressure rotary joint 9 rotates together. The fixed end of the negative pressure rotary joint 9 is fixed to the equipment frame by the fixed seat and is in a relatively stationary state. This fixed end is connected to an external negative pressure generator through a pipeline. After the negative pressure is applied to the substrate, a huge frictional force is generated between the substrate and the roller surface of the adsorption roller 4. The substrate rotates with the adsorption roller 4, thereby driving the substrate to pass precisely and uniformly under the coating head to complete the coating operation. Throughout the process, due to the continuity and stability of the flat belt 5 transmission, the speed of the adsorption roller 4 does not fluctuate periodically, ensuring the extreme uniformity of the coating thickness.

[0018] In summary, this utility model, through the above-mentioned innovative structural combination, effectively solves the core pain point of the transmission system of high-precision coating equipment, and provides a reliable technical guarantee for achieving high-quality coated products.

[0019] Any aspects not detailed in this application are well-known to those skilled in the art.

[0020] The preferred embodiments of this application have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this application without inventive effort. Therefore, any technical solutions that can be obtained by those skilled in the art based on the concept of this application through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A high-precision coating flat belt drive device, characterized in that, The equipment includes a servo motor (1), a drive wheel (2), a driven wheel (3), an adsorption roller (4), and a flat belt (5); the servo motor (1) is fixedly mounted on the equipment frame via a motor mount; the drive wheel (2) is fixedly mounted on the output shaft of the servo motor (1); the adsorption roller (4) has a hollow inner cavity, and the two ends of the adsorption roller (4) are respectively mounted on the equipment frame with bearing seats; the roller surface of the adsorption roller (4) has several adsorption micro-holes (7), and the adsorption micro-holes (7) are connected to the hollow inner cavity; one end of the adsorption roller (4) extends outward with a transmission tube (8), the outer end of the transmission tube (8) is connected to a negative pressure rotary joint (9), the inner end of the transmission tube (8) is connected to the hollow inner cavity, the driven wheel (3) is fixed to the transmission tube (8), and the drive wheel (2) and the driven wheel (3) are connected by a synchronous belt (10); the flat belt (5) is a seamless annular belt that tightly wraps around the two adsorption rollers (4).

2. The high-precision flat belt drive device for coating according to claim 1, characterized in that, The flat belt (5) is made of polyurethane material or fiber-reinforced composite material with low elongation and high coefficient of friction.

3. The high-precision flat belt drive device for coating according to claim 1, characterized in that, The outer circumferential surfaces of the driving wheel (2) and the driven wheel (3) are provided with coatings or textures to increase friction.

4. The high-precision flat belt drive device for coating according to claim 1, characterized in that, The device also includes a tensioning mechanism for adjusting the tension of the timing belt (10).

5. A high-precision flat belt drive device for coating according to claim 4, characterized in that, The tensioning mechanism is a tensioning wheel (6), which presses against the non-working surface of the synchronous belt (10), and its wheel seat is adjustablely mounted on the equipment frame.

6. A high-precision flat belt drive device for coating according to claim 1, characterized in that, The servo motor (1) is an AC servo motor.

Images