Vacuum roller and material belt conveying device

Abstract

The invention provides a vacuum roller which comprises a cylindrical roller shaft, an adsorption cavity is formed in the roller shaft, a plurality of adsorption devices communicated with the adsorption cavity are arranged on the surface of the roller shaft, a driving shaft and a connecting pipe are arranged at the two ends of the roller shaft respectively, the connecting pipe is communicated with the adsorption cavity, and when the roller shaft rotates, the driving shaft drives the adsorption device to rotate. And the adsorption device is used for adsorbing the material belt and enabling the material belt to advance. According to the invention, the problems of uneven stress of the material belt caused by main driving force, limited tension, indentation, tearing, damage to the material belt caused by wear of the compression roller and the like can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of material belt transmission, and in particular relates to a vacuum roller and a material belt transmission device. Background Art

[0002] With the development of the new energy lithium battery industry, the lamination technology in the industry is constantly developing. Cutting and laminating machines, slicing machines, thermal laminating machines and other machines all use pressure rollers and main drive rollers as the power for material belt transmission.

[0003] At present, most of the pressure rollers and main drive rollers used in the industry cooperate to provide power for the material belt transmission, which has the following shortcomings: 1. The length of the pressure roller is usually much smaller than the width of the material belt, and the material belt is only powered by the pressing and rolling of the middle area, and the force on the material belt is uneven. 2. If the pressure roller is too long, it is easy to cause wrinkles on the material belt due to uneven pressure. 3. When the pressure is high, it is easy to produce indentations on the material belt, and when the pressure is low, it is easy to cause the material belt to slip, produce scratches and poor feeding accuracy. 4. Because only the middle part of the material belt is pressed to provide transmission power, the tension that can be provided is limited. Excessive tension will cause the material belt to deform and tear. 5. The pressure roller will wear and slag after long-term use, which will damage the pole piece. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the present invention aims to provide a vacuum roller and a material belt transmission device, which can overcome the problems of uneven force on the material belt caused by the main driving force, limited tension, indentation, tearing and material belt damage caused by roller wear.

[0005] To achieve the above-mentioned purpose, the present invention provides a vacuum roller, comprising a cylindrical roller shaft, an adsorption chamber is provided inside the roller shaft, a plurality of adsorption devices connected with the adsorption chamber are arranged on the surface of the roller shaft, a driving shaft and a connecting pipe are respectively arranged at both ends of the roller shaft, the connecting pipe is connected with the adsorption chamber, and when the roller shaft rotates, the material belt is attracted and advanced by the adsorption device.

[0006] An inner cylinder is arranged inside the roller shaft and is in contact with and rotates therein. An adsorption device is arranged on the cylinder wall of the inner cylinder. When the inner cylinder rotates inside the roller shaft, the adsorption force on the surface of the roller shaft is adjusted by changing the size of the overlapping area between the adsorption device of the inner cylinder and the adsorption device of the roller shaft.

[0007] The outer end of the connecting tube is connected to a vacuum machine. When the vacuum machine is working, air is sucked through the connecting tube to make the adsorption chamber reach a negative pressure, so that the adsorption device attracts the material belt and makes it move forward.

[0008] The width of the adsorption area of ​​the adsorption device of the roller is not greater than the width of the material strip.

[0009] The adsorption device is one or more combinations of a plurality of adsorption holes and adsorption grooves arranged on the surface of the roller.

[0010] The adsorption holes can be circular, square, etc.

[0011] The roller shaft comprises a cylinder body and two end covers which are sealed and installed with the cylinder body.

[0012] The end cap fixedly connected to the connecting pipe is provided with an adjusting device, and the adjusting device is used to adjust the negative pressure in the adsorption chamber.

[0013] The outer end of the connecting pipe is connected to the vacuum machine through a joint.

[0014] A material belt transmission device comprises any of the above-mentioned rollers, and also comprises a fixed bracket and a driving device, wherein the driving shaft and the connecting pipe on the roller are installed in the fixed bracket through bearings, and the driving device is fixedly connected to the driving shaft and is used to drive the roller to actively rotate, and an adsorption device is provided on the roller, and when the material belt passes around the roller, the adsorption device attracts and pulls the material belt forward.

[0015] Compared with the prior art, the present invention achieves the following significant technical effects:

[0016] The vacuum roller and material belt transmission device of the present invention can overcome the problems of uneven force on the material belt caused by the main driving force, limited tension, indentation, tearing and material belt damage caused by pressure roller wear.

[0017] The concept and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, features and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a vacuum roller according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0020] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic manner, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0021] With the development of the new energy lithium battery industry, the lamination technology is constantly developing in the industry. Cutting and laminating machines, film making machines, thermal composite machines and other models all use pressure rollers and main drive rollers as the power for material belt transmission. In order to overcome the problems of uneven force on the material belt caused by the main driving force, limited tension, indentation, tearing and damage to the material belt caused by pressure roller wear, this structural vacuum roller is used as the traction main drive.

[0022] Embodiment 1:

[0023] See also Figure 1 A vacuum roller comprises a cylindrical roller shaft 2, wherein an adsorption chamber is provided inside the roller shaft 2, a plurality of adsorption devices 3 communicating with the adsorption chamber are arranged on the surface of the roller shaft 2, a driving shaft and a connecting pipe 4 are respectively arranged at both ends of the roller shaft 2, and the connecting pipe 4 is communicated with the adsorption chamber. When the roller shaft 2 rotates, the material belt 1 is attracted by the adsorption device 3 and is moved forward.

[0024] The outer end of the connecting tube 4 is connected to a vacuum machine. When the vacuum machine is working, air is sucked through the connecting tube 4 to make the adsorption chamber reach a negative pressure, so that the adsorption device 3 attracts the material belt 1 and makes it move forward.

[0025] The width of the adsorption area of ​​the adsorption device 3 is not greater than the width of the material strip 1 .

[0026] The adsorption device 3 is one or more combinations of a plurality of adsorption holes and adsorption grooves arranged on the surface of the roller.

[0027] The adsorption hole can be circular, square, etc. In the specific implementation of the present application, the shape of the adsorption hole can be changed according to the needs, and can also be triangular, U-shaped, etc., which can be communicated with the adsorption cavity of the roller, and the structure of the adsorption hole generating adsorption force through the vacuum machine is within the protection scope of the present application.

[0028] The roller shaft 2 includes a cylinder body and two end covers sealed and installed with the cylinder body.

[0029] An adjusting device is provided at the end cap fixedly connected to the connecting tube 4, and the adjusting device is used to adjust the negative pressure in the adsorption chamber. In specific implementation, the adjusting device of the present application includes an adjusting tube located in the adsorption chamber and pulled out therein, the adjusting tube is provided with an air inlet and an air outlet, the air outlet is connected to the adsorption chamber, and the position of the adjusting tube in the adsorption chamber is pulled out, so as to adjust the number of adsorption holes blocked by the tube body of the adjusting tube and the adsorption chamber, so that the adsorption force of the adsorption holes is different. Of course, the present application is not limited to this type of adjusting device, and devices that achieve different suction forces of the adsorption holes are all within the protection scope of the present application.

[0030] The outer end of the connecting tube 4 is connected to the vacuum machine through a joint. In specific implementation, an adjustment switch can be set on the joint, and the adjustment switch can adjust the negative pressure value of the adsorption chamber, thereby adjusting the attraction of the adsorption hole to the material belt.

[0031] Embodiment 2:

[0032] The structure of the vacuum roller in this embodiment is basically the same as that in the first embodiment, the only difference is that an inner cylinder is provided in the roller shaft, which is attached to and rotates therein, and an adsorption device is provided on the cylinder wall of the inner cylinder. When the inner cylinder rotates in the roller shaft, the attraction force of the roller shaft surface is adjusted by changing the size of the overlap area between the adsorption device of the inner cylinder and the adsorption device of the roller shaft. In the specific implementation of this embodiment, the attraction force of the roller shaft to the material belt can be changed by rotating the inner cylinder so that the adsorption device on the inner cylinder overlaps with the adsorption device on the roller shaft surface. At the same time, an adjustment switch can be set, and the adjustment switch can adjust the negative pressure value of the adsorption chamber, thereby adjusting the attraction force of the adsorption hole to the material belt. One adjustment method can be used, or two adjustment methods can be used at the same time, so that the control of the attraction force of the roller shaft surface is more precise.

[0033] Embodiment three:

[0034] The structure of the roller in the vacuum roller in this embodiment is basically the same as that in the first and second embodiments, the only difference is that a downward groove is provided on the roller corresponding to the pole ear of the material strip, which can prevent the pole ear from folding when the pole ear passes through. No adsorption device is provided at the groove to prevent the pole ear from folding downward due to attraction.

[0035] Embodiment 4:

[0036] A material belt conveying device comprises a fixed bracket 5, a roller 2 and a driving device 6. The driving shaft on the roller 2 and the connecting pipe 4 are installed in the fixed bracket 5 through bearings. The driving device 6 is fixedly connected to the driving shaft and is used to drive the roller 2 to actively rotate. An adsorption device 3 is provided on the roller 2. When the material belt 1 passes around the roller 2, the adsorption device 3 attracts and pulls the material belt forward.

[0037] In the specific implementation, the structures of the roller 2 and the adsorption device 3 in this embodiment are the same as those in the first embodiment, and are not described here repeatedly.

[0038] The vacuum roller of the present application is used as the main traction drive. The vacuum roller uses vacuum attraction to attract the material belt, and the vacuum roller rotates to pull the material belt forward to provide traction power. The vacuum roller is evenly distributed with adsorption holes, which can cover the entire wide width of the material belt, so that the material belt is evenly stressed, the pressure roller structure is eliminated, and problems such as indentation and tearing are avoided. At the same time, the structure can also provide greater traction to meet the needs of large tension.

[0039] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A vacuum roller, characterized in that: It includes a cylindrical roller shaft, an adsorption cavity is arranged inside the roller shaft, a plurality of adsorption devices connected with the adsorption cavity are arranged on the surface of the roller shaft, a driving shaft and a connecting pipe are arranged at both ends of the roller shaft, the connecting pipe is connected with the adsorption cavity, and when the roller shaft rotates, the material belt is attracted and advanced through the adsorption device.

2. A vacuum roller according to claim 1, characterized in that: An inner cylinder is arranged inside the roller shaft, which is in contact with and rotates therein, and an adsorption device is arranged on the cylinder wall of the inner cylinder. When the inner cylinder rotates inside the roller shaft, the attraction force on the surface of the roller shaft is adjusted by changing the size of the overlapping area between the adsorption device of the inner cylinder and the adsorption device of the roller shaft.

3. A vacuum roller according to claim 1, characterized in that: The outer end of the connecting tube is connected to a vacuum machine. When the vacuum machine is working, air is sucked through the connecting tube to make the adsorption chamber reach a negative pressure, so that the adsorption device attracts the material belt and makes it move forward.

4. A vacuum roller according to claim 2, characterized in that: The width of the adsorption area of ​​the adsorption device of the roller is not greater than the width of the material strip.

5. A vacuum roller according to claim 4, characterized in that: The adsorption device is one or more combinations of a plurality of adsorption holes and adsorption grooves arranged on the surface of the roller.

6. A vacuum roller according to claim 5, characterized in that: The adsorption holes can be circular, square, etc.

7. A vacuum roller according to claim 2, characterized in that: The roller shaft comprises a cylinder body and two end covers which are sealed and installed with the cylinder body.

8. A vacuum roller according to claim 7, characterized in that: The end cap fixedly connected to the connecting pipe is provided with an adjusting device, and the adjusting device is used to adjust the negative pressure in the adsorption chamber.

9. A vacuum roller according to claim 3, characterized in that: The outer end of the connecting pipe is connected to the vacuum machine through a joint.

10. A tape transmission device, characterized in that: It includes the roller shaft as described in any one of the above claims 1-9, and also includes a fixed bracket and a driving device, the driving shaft and the connecting pipe on the roller shaft are installed in the fixed bracket through bearings, the driving device is fixedly connected to the driving shaft, and is used to drive the roller shaft to actively rotate, and the roller shaft is provided with an adsorption device, when the material belt bypasses the roller shaft, the adsorption device attracts and pulls the material belt forward.

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