Main transmission device for printing equipment

Abstract

The utility model discloses a main transmission device for printing equipment, which comprises a transmission roller, a first driving component and a second driving component, the transmission roller comprises a main shaft, a roller and a fixed sleeve plate which are coaxially arranged, and the fixed sleeve plate is positioned in the roller and outside the main shaft; the first driving assembly and the second driving assembly are arranged in the two ends of the roller correspondingly. According to the main transmission device for the printing equipment, under the two-driving-assembly structure of the first driving assembly and the second driving assembly, the two driving assemblies can be used in a combined mode, for example, the first driving assembly with the characteristic suitable for low-speed operation is used for driving in the low-speed stage, and the second driving assembly is used for driving in the low-speed stage. And in the high-speed stage, the second driving assembly with the characteristic suitable for high-speed operation is used for driving, so that the first driving assembly and the second driving assembly can work in a linear working interval with relatively reasonable rotating speed, and the driving efficiency can be improved while the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a main transmission device for printing equipment. Background Art

[0002] The transmission device is a key component in printing equipment such as digital printers and rotary screen printers, primarily used to drive the guide belt and convey the material. The main transmission device of existing printing equipment generally includes a roller, which is connected to an external drive mechanism, such as through a belt, gears, or directly connected to the drive mechanism, and then driven by the drive mechanism, as disclosed in Chinese patent application No. 201220083053.0. The main transmission device of such printing equipment driven by an external drive mechanism has the following disadvantages:

[0003] 1. The installation space required for the external drive mechanism is large;

[0004] 2. The existence of intermediate transmission structures such as belts and gears not only results in large transmission losses and high energy consumption, but also low transmission accuracy, making it unsuitable for high-quality printing;

[0005] 3. During the printing process, in the early stage of startup, when the printing is not yet stable, the roller usually runs at a low speed and is in the low-speed operation stage; after the printing is stable, the roller speed increases and enters the high-speed printing stage. When the existing roller is driven by a drive mechanism, although the drive speed of the drive mechanism can be adjusted by the control of the controller to achieve low-speed to high-speed operation, each drive mechanism has its own operating characteristics and optimal working range after design. It is usually difficult for the same drive mechanism to be suitable for both low and high speeds. As a result, when a drive mechanism originally suitable for low-speed operation is running in the high-speed stage, or when a drive mechanism originally suitable for high-speed operation is running in the low-speed stage, it is not in the reasonable linear working range, which often leads to reduced work efficiency. Utility Model Content

[0006] The purpose of the utility model is to provide a main transmission device for printing equipment.

[0007] The technical solution for achieving the purpose of the utility model is: a main transmission device for printing equipment, comprising a transmission roller, a first drive assembly and a second drive assembly, the transmission roller comprising a coaxially arranged main shaft, a roller and a fixed sleeve, the two ends of the main shaft are rotatably mounted on the frames on both sides, the inner diameter of the roller is larger than the diameter of the main shaft, the fixed sleeve is located inside the roller and outside the main shaft, the fixed sleeve is sleeved on the main shaft, and the outer peripheral wall of the fixed sleeve is fixed to the inner wall of the roller; the first drive assembly and the second drive assembly are respectively arranged inside the two ends of the roller, the fixed sleeve is located between the first drive assembly and the second drive assembly, the first drive assembly comprises a coaxially sleeved first stator and a first rotor, the first stator is fixedly mounted on the frame on the same side, and the first rotor is coaxially mounted on the transmission roller; the second drive assembly comprises a coaxially sleeved second stator and a second rotor, the second stator is fixedly mounted on the frame on the same side, and the second rotor is coaxially mounted on the transmission roller.

[0008] Furthermore, the number of the fixed sleeves is multiple, and the multiple fixed sleeves are arranged and distributed along the axial direction of the main shaft. For example, if there are two fixed sleeves, the two fixed sleeves are evenly spaced along the axial direction of the main shaft. In this arrangement, the roller can be stably supported by multiple fixed sleeves, which not only provides strong support for the roller but also simplifies the assembly structure of the support.

[0009] Furthermore, the first rotor is located radially inward of the first stator. The first rotor can be located radially outward of the first stator or radially inward of the first stator. Compared to the former, the latter arrangement where the first rotor is located radially inward of the first stator facilitates mounting the first rotor on the main shaft.

[0010] Furthermore, the first rotor is sleeved on the main shaft. The first rotor can be mounted on the main shaft, or on the roller, or on the fixed sleeve. Compared with the roller and the fixed sleeve, when the first rotor is sleeved on the main shaft, not only is the coaxiality higher, but the mounting structure is also more secure and reliable.

[0011] Furthermore, the first rotor is a rotor winding or a rotor magnet. The first rotor can be a rotor magnet that is coupled to the first stator via a permanent magnetic field; the first rotor can also be a rotor winding that is coupled to the first stator via a magnetic field generated by the winding when energized.

[0012] Furthermore, the first stator includes a first stator winding and a first mounting side plate. The first stator winding is located inside the roller and is coaxially sleeved with the first rotor. The first mounting side plate is located outside the end side of the roller. The end of the first stator winding is fixedly mounted on the first mounting side plate, and the first mounting side plate is fixedly mounted to the frame on the same side. The first stator may only include the first stator winding, which is directly mounted on the frame on the same side; the first stator may also include the first stator winding and the first mounting side plate. Compared to the former, when the first stator includes the first stator winding and the first mounting side plate, the first stator winding can be first mounted on the first mounting side plate, and then fixed to the frame on the same side via the first mounting side plate, thereby facilitating the installation of the first stator and the frame on the same side.

[0013] Furthermore, the second rotor is located radially inward of the second stator. The second rotor can be located radially outward of the second stator or radially inward of the second stator. Compared to the former, the latter arrangement where the second rotor is located radially inward of the second stator facilitates mounting the second rotor on the main shaft.

[0014] Furthermore, the second rotor is sleeved on the main shaft. The second rotor can be mounted on the main shaft, on the roller, or on the fixed sleeve. Compared with the roller and the fixed sleeve, when the second rotor is sleeved on the main shaft, not only is the coaxiality higher, but the mounting structure is also more secure and reliable.

[0015] Furthermore, the second rotor is a rotor winding or a rotor magnet. The second rotor can be a rotor magnet that is coupled to the second stator via a permanent magnetic field; the second rotor can also be a rotor winding that is coupled to the second stator via a magnetic field generated by the winding when energized.

[0016] Furthermore, the second stator includes a second stator winding and a second mounting side plate. The second stator winding is located within the roller and is coaxially sleeved with the second rotor. The second mounting side plate is located outside the end of the roller. The end of the second stator winding is fixedly mounted on the second mounting side plate, and the second mounting side plate is fixedly mounted to the frame on the same side. The second stator may only include the second stator winding, which is directly mounted on the frame on the same side; the second stator may also include the second stator winding and the second mounting side plate. Compared to the former, when the second stator includes the second stator winding and the second mounting side plate, the second stator winding can be first mounted on the second mounting side plate, and then fixed to the frame on the same side via the second mounting side plate, facilitating the installation of the second stator on the same side of the frame.

[0017] Furthermore, the first driving assembly is a driving assembly used for low-speed operation; and the second driving assembly is a driving assembly used for high-speed operation.

[0018] The utility model is used for a main transmission device of a printing device, wherein the transmission roller comprises a main shaft, a roller and a fixed sleeve, wherein the roller is coaxially mounted on the main shaft through the fixed sleeve, and the main shaft, the roller and the fixed sleeve form a connected structure. Under the connected structure, not only is the structural strength strong, but also the main shaft and the roller are hollow, and the whole structure is light. When the first drive component or the second drive component is driven and operated, the load is small, and the driving of the first drive component or the second drive component is easier and consumes less energy. In addition, once the first drive component or the second drive component fails, the rotatable mounting structure of the main shaft can also facilitate external drive, so that the drive transmission of the transmission roller is more flexible, and the first drive component or the second drive component can be prevented from being unusable due to failure.

[0019] The utility model is used for a main transmission device of a printing device. The first drive assembly and the second drive assembly are respectively provided inside the two ends of the roller. With the two drive assembly structure of the first drive assembly and the second drive assembly, the driving options of the transmission roller are multiple and the use flexibility is high. The first drive assembly and the second drive assembly can not only be selected to drive the transmission roller by using a single first drive assembly or the second drive assembly, but one of the first drive assembly and the second drive assembly can be used while the other is in standby mode, thereby preventing the transmission roller from being unable to drive due to a failure of the first drive assembly or the second drive assembly, thereby greatly improving the stability of the equipment. The first drive assembly and the second drive assembly can also be used in combination. For example, in a low-speed stage, the first drive assembly with a linear range of low speed and suitable for low-speed operation is used for driving, and in a high-speed stage, the second drive assembly with a linear range of high speed and suitable for high-speed operation is used for driving. In this way, in the low-speed stage and the high-speed stage, the first drive assembly and the second drive assembly, which automatically switch and operate alternately, can both operate in a linear working range with a relatively reasonable speed. During the driving process, energy loss is small and the energy conversion rate is high, thereby reducing energy consumption and improving driving efficiency.

[0020] In addition, the utility model is used for the main transmission device of the printing equipment, the first drive component includes a first stator and a first rotor which are coaxially sleeved, the second drive component includes a second stator and a second rotor which are coaxially sleeved, the first rotor and the second rotor are both coaxially mounted on the transmission roller, under the structure of the first drive component and the second drive component, after the first drive component or the second drive component is started, the rotating first rotor or the second rotor can directly drive the transmission roller without the need for an intermediate transmission mechanism, the required installation space is small, the installation is convenient, the transmission loss is small, the energy consumption is low, and the transmission accuracy is high.

[0021] The main transmission device of the present invention is used for printing equipment. The working mode of the first drive component and the second drive component can be set under dual drive. When the first drive component and the second drive component are used together, the first drive component and the second drive component can both work in a linear working range with a relatively reasonable speed, thereby improving the conversion of driving energy from the driving source. The structural setting of the first drive component including the first stator and the first rotor and the second drive component including the second stator and the second rotor makes it possible to eliminate the intermediate transmission structure, thereby reducing the energy loss caused by the transmission from the perspective of energy transfer. The hollow setting of the transmission roller reduces the load from the driving end. In other words, the main transmission device of the present invention is used for printing equipment. In terms of the driving source, intermediate transmission, and driving end, combined with various relevant settings, it greatly reduces the drive transmission energy consumption and improves the transmission accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the axial cross-sectional structure of the main transmission device of the utility model for printing equipment;

[0023] Figure 2 The utility model is a main transmission device for printing equipment. Figure 1 Schematic diagram of the cross-sectional structure along the AA line;

[0024] Figure 3 The utility model is a main transmission device for printing equipment. Figure 1 Cross-section along line BB;

[0025] Figure 4 The utility model is a main transmission device for printing equipment. Figure 1 Cross-section along the CC line. DETAILED DESCRIPTION

[0026] The following is a detailed description of the preferred embodiment of the main transmission device of the utility model for printing equipment with reference to the accompanying drawings:

[0027] like Figures 1 to 4As shown, a main transmission device for a printing device includes a transmission roller 10, a first driving component 1 and a second driving component 2, wherein the transmission roller 10 includes a coaxially arranged main shaft 101, a roller 102 and a fixed sleeve 103, the two ends of the main shaft 101 are rotatably mounted on the two side frames 20, the inner diameter D2 of the roller 102 is larger than the diameter D1 of the main shaft 101, the fixed sleeve 103 is located inside the roller 102 and outside the main shaft 101, the fixed sleeve 103 is sleeved on the main shaft 101, and the outer peripheral wall of the fixed sleeve 103 is fixed to the inner wall of the roller 102; the first driving component 1 The driving assembly 1 and the second driving assembly 2 are respectively arranged inside the two ends of the roller 102, and the fixed sleeve 103 is located between the first driving assembly 1 and the second driving assembly 2. The first driving assembly 1 includes a coaxially sleeved first stator 11 and a first rotor 12, the first stator 11 is fixedly mounted on the frame 20 on the same side, and the first rotor 12 is coaxially mounted on the transmission roller 10; the second driving assembly 2 includes a coaxially sleeved second stator 21 and a second rotor 22, the second stator 21 is fixedly mounted on the frame 20 on the same side, and the second rotor 22 is coaxially mounted on the transmission roller 10.

[0028] The present invention is a main transmission device for a printing device. The transmission roller 10 rotates under the drive of the first drive component 1 or the second drive component 2, and is used to drive the guide belt in the printing device, thereby conveying the fabric entering the printing device for printing. In the transmission roller 10, the main shaft 101 serves as the central support shaft; the roller 102 is through-hole at both ends, and the inner diameter D2 of the roller 102 is larger than the diameter D1 of the main shaft 101. After the main shaft 101 passes through the roller 102, a gap is formed between the main shaft 101 and the roller 102. The fixed sleeve 103 is installed between the main shaft 101 and the roller 102. The roller 102 is coaxially mounted on the main shaft 101 through the support of the fixed sleeve 103. The main shaft 101 , the roller 102 and the fixed sleeve 103 are connected and fixed to form the transmission roller 10 . The entire transmission roller 10 is finally rotatably mounted on the two side frames 20 through the two ends of the main shaft 101 .

[0029] The present invention is a main transmission device for a printing machine. The first drive assembly 1 and the second drive assembly 2 are respectively disposed inside the ends of the roller 102 and outside all the fixed sleeves 103. The first drive assembly 1 includes a coaxially sleeved first stator 11 and a first rotor 12. Gaps are formed between the first stator 11 and the drive roller 10, and between the first stator 11 and the first rotor 12. When power is applied, the magnetic fields formed by the first stator 11 and the first rotor 12 couple and interact with each other, generating a driving force. Under this driving force, the first rotor 12 rotates, driving the connected drive roller 10. The second drive assembly 2 includes a coaxially sleeved second stator 21 and a second rotor 22. Gaps are formed between the second stator 21 and the drive roller 10, and between the second stator 21 and the second rotor 22. When power is applied, the magnetic fields formed by the second stator 21 and the second rotor 22 couple and interact with each other, generating a driving force. Under this driving force, the second rotor 22 rotates, driving the connected drive roller 10. The working principles of the first drive assembly 1 and the second drive assembly 2 are common knowledge, and the present invention will not elaborate on them in detail.

[0030] The present invention is used in a main transmission device for printing equipment. During operation, the first drive assembly 1 or the second drive assembly 2 drives the transmission roller 10 to rotate. The rotating transmission roller 10 drives the guide belt to transport the printed fabric. Specifically, during operation, the transmission roller 10 can be driven by the first drive assembly 1 during low-speed operation and by the second drive assembly 2 during high-speed operation.

[0031] The utility model is used for the main transmission device of the printing equipment, the transmission roller 10 includes a main shaft 101, a roller 102 and a fixed sleeve 103, the roller 102 is coaxially mounted on the main shaft 101 through the fixed sleeve 103, the main shaft 101, the roller 102 and the fixed sleeve 103 form a connected structure, under this connected structure, not only the structural strength is strong, but also the main shaft 101 and the roller 102 are hollow, the whole structure is light, when the first drive component 1 or the second drive component 2 is driven and running, the load is small, the driving of the first drive component 1 or the second drive component 2 is easier, and the energy consumption is also smaller; in addition, once the first drive component 1 or the second drive component 2 fails, the rotatable mounting structure of the main shaft 101 can also facilitate external drive, so that the drive transmission of the transmission roller 10 is more flexible, and it is avoided that the first drive component 1 or the second drive component 2 cannot be used due to the failure of the first drive component 1 or the second drive component 2.

[0032] The utility model is used for the main transmission device of the printing equipment. The first drive component 1 and the second drive component 2 are respectively provided inside the two ends of the roller 102. Under the two drive component structures of the first drive component 1 and the second drive component 2, the drive roller 10 has many drive options and high flexibility. The first drive component 1 and the second drive component 2 can not only be selected, but also use a single first drive component 1 or the second drive component 2 to drive the drive roller 10. Among the first drive component 1 and the second drive component 2, one is in motion and the other can be used as a standby to prevent the first drive component 1 or the second drive component 2 from malfunctioning. This causes the transmission roller 10 to be unable to transmit, greatly improving the stability of the equipment; and the first drive component 1 and the second drive component 2 can also be used in combination, such as using the first drive component 1 in a linear range at low speed and suitable for low-speed operation to drive in the low-speed stage, and using the second drive component 2 in a linear range at high speed and suitable for high-speed operation to drive in the high-speed stage. In this way, in the low-speed stage and the high-speed stage, the first drive component 1 and the second drive component 2 that automatically switch and operate alternately can both work in a linear working range with a relatively reasonable speed. During the driving process, the energy loss is small and the energy conversion rate is high. While reducing energy consumption, the driving efficiency can also be improved.

[0033] In addition, the utility model is used for the main transmission device of the printing equipment, and the first drive component 1 includes a coaxially sleeved first stator 11 and a first rotor 12, and the second drive component 2 includes a coaxially sleeved second stator 21 and a second rotor 22, and the first rotor 12 and the second rotor 22 are both coaxially installed on the transmission roller 10. Under the structure of the first drive component 1 and the second drive component 2, after the first drive component 1 or the second drive component 2 is started, the rotating first rotor 12 or the second rotor 22 can directly drive the transmission roller 10 without the need for an intermediate transmission mechanism. The required installation space is small, and the installation is convenient. At the same time, the transmission loss is small, the energy consumption is low, and the transmission accuracy is high.

[0034] The present invention is a main transmission device for a printing machine. The first drive assembly 1 and the second drive assembly 2 have a dual-drive structure, and the working mode can be set to distribute the drive of the first drive assembly 1 and the second drive assembly 2. When the first drive assembly 1 and the second drive assembly 2 are used together, the first drive assembly 1 and the second drive assembly 2 can both operate in a linear working range with a relatively reasonable speed, thereby improving the conversion of drive energy from the drive source. The first drive assembly 1, which includes a first stator 11 and a first rotor 12, and the second drive assembly 2, which includes a second stator 21 and a second rotor 22, have no intermediate transmission structure, thereby reducing energy loss caused by transmission from the perspective of energy transfer. The hollow design of the transmission roller 10 reduces the load at the drive end. In other words, the present invention is a main transmission device for a printing machine. By combining various related settings from the aspects of the drive source, intermediate transmission, and drive end, it greatly reduces the drive transmission energy consumption, improves the transmission accuracy, and enhances the printing quality.

[0035] The present invention is used in a main transmission device for printing equipment. Preferably, the number of the fixed sleeves 103 is multiple, and the multiple fixed sleeves 103 are arranged and distributed along the axial direction of the main shaft 101. For example, if there are two fixed sleeves 103, the two fixed sleeves 103 are evenly spaced along the axial direction of the main shaft 101. In this arrangement, the roller 102 can be stably supported by the multiple fixed sleeves 103, which not only provides strong support for the roller 102 but also simplifies the assembly structure of the support.

[0036] In the main transmission device of the printing equipment of the present invention, the first rotor 12 is preferably located radially inward of the first stator 11. The first rotor 12 can be located radially outward of the first stator 11 or radially inward of the first stator 11. Compared to the former, the latter arrangement where the first rotor 12 is located radially inward of the first stator 11 facilitates mounting the first rotor 12 on the main shaft 101.

[0037] The present invention is used for the main transmission device of the printing equipment. Preferably, the first rotor 12 is mounted on the main shaft 101. The first rotor 12 can be mounted on the main shaft 101, or on the roller 102, or on the fixed sleeve 103. Compared with the roller 102 and the fixed sleeve 103, when the first rotor 12 is mounted on the main shaft 101, not only the coaxiality is higher, but also the mounting structure is more solid and reliable.

[0038] In the main transmission device of the printing equipment of the present invention, the first rotor 12 is preferably a rotor winding or a rotor magnet. The first rotor 12 can be a rotor magnet that couples with the first stator 11 via a permanent magnetic field. The first rotor 12 can also be a rotor winding that couples with the first stator 11 via the magnetic field generated by the winding when energized.

[0039] The present invention is used for a main transmission device of a printing device. Preferably, the first stator 11 includes a first stator winding 111 and a first mounting side plate 112. The first stator winding 111 is located inside the roller 102 and is coaxially sleeved with the first rotor 12. The first mounting side plate 112 is located outside the end side of the roller 102. The end of the first stator winding 111 is fixedly mounted on the first mounting side plate 112, and the first mounting side plate 112 is fixedly mounted to the frame 20 on the same side. The first stator 11 may include only the first stator winding 111, which is directly mounted on the frame 20 on the same side; the first stator 11 may also include the first stator winding 111 and the first mounting side plate 112. Compared with the former, in the latter, when the first stator 11 includes a first stator winding 111 and a first mounting side plate 112, the first stator winding 111 can be first installed on the first mounting side plate 112, and then fixed to the frame 20 on the same side through the first mounting side plate 112, which facilitates the installation of the first stator 11 and the frame 20 on the same side.

[0040] In the main transmission device of the printing equipment of the present invention, the second rotor 22 is preferably located radially inward of the second stator 21. The second rotor 22 can be located radially outward of the second stator 21 or radially inward of the second stator 21. Compared to the former, the latter arrangement where the second rotor 22 is located radially inward of the second stator 21 facilitates mounting the second rotor 22 on the main shaft 101.

[0041] The present invention is used for the main transmission device of the printing equipment. Preferably, the second rotor 22 is sleeved on the main shaft 101. The second rotor 22 can be installed on the main shaft 101, or on the roller 102, or on the fixed sleeve 103. Compared with the roller 102 and the fixed sleeve 103, when the second rotor 22 is sleeved on the main shaft 101, not only the coaxiality is higher, but also the mounting structure is more solid and reliable.

[0042] In the main transmission device of the printing equipment of the present invention, the second rotor 22 is preferably a rotor winding or a rotor magnet. The second rotor 22 can be a rotor magnet that couples with the second stator 21 via a permanent magnetic field. The second rotor 22 can also be a rotor winding that couples with the second stator 21 via the magnetic field generated by the winding when energized.

[0043] The present invention is used for a main transmission device of a printing device. Preferably, the second stator 21 includes a second stator winding 211 and a second mounting side plate 212. The second stator winding 211 is located inside the roller 102 and is coaxially sleeved with the second rotor 22. The second mounting side plate 212 is located outside the end side of the roller 102. The end of the second stator winding 211 is fixedly mounted on the second mounting side plate 212, and the second mounting side plate 212 is fixedly mounted to the frame 20 on the same side. The second stator 21 may include only the second stator winding 211, which is directly mounted on the frame 20 on the same side; the second stator 21 may also include the second stator winding 211 and the second mounting side plate 212. Compared with the former, in the latter, when the second stator 21 includes a second stator winding 211 and a second mounting side plate 212, the second stator winding 211 can be first installed on the second mounting side plate 212, and then fixed to the frame 20 on the same side through the second mounting side plate 212, which facilitates the installation of the second stator 21 and the frame 20 on the same side.

[0044] The present invention is used for the main transmission device of the printing equipment. Preferably, the first drive assembly 1 is a drive assembly for low-speed operation; the second drive assembly 2 is a drive assembly for high-speed operation. The first drive assembly 1 is a drive assembly with a linear range at low speed, and the second drive assembly 2 is a drive assembly with a linear range at low speed. During operation, the first drive assembly 1 with a linear range at low speed and suitable for low speed operation is used for driving in the low-speed stage, and the second drive assembly 2 with a linear range at high speed and suitable for high speed operation is automatically switched to drive in the high-speed stage.

[0045] The utility model is used for a main transmission device of a printing device and can be applied to printing devices such as digital printing machines and rotary screen printing machines.

[0046] For ordinary technicians in the technical field to which the utility model belongs, the utility model can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as falling within the scope of protection of the utility model.

Claims

1. A main transmission device for a printing device, characterized in that: It includes a transmission roller, a first drive assembly and a second drive assembly, the transmission roller includes a coaxially arranged main shaft, a roller and a fixed sleeve, the two ends of the main shaft are rotatably mounted on the frames on both sides, the inner diameter of the roller is larger than the diameter of the main shaft, the fixed sleeve is located inside the roller and outside the main shaft, the fixed sleeve is sleeved on the main shaft, and the outer peripheral wall of the fixed sleeve is fixed to the inner wall of the roller; the first drive assembly and the second drive assembly are respectively arranged inside the two ends of the roller, the fixed sleeve is located between the first drive assembly and the second drive assembly, the first drive assembly includes a coaxially sleeved first stator and a first rotor, the first stator is fixedly mounted on the frame on the same side, and the first rotor is coaxially mounted on the transmission roller; the second drive assembly includes a coaxially sleeved second stator and a second rotor, the second stator is fixedly mounted on the frame on the same side, and the second rotor is coaxially mounted on the transmission roller.

2. The main transmission device for printing equipment according to claim 1, characterized in that: There are a plurality of fixed sleeves, and the plurality of fixed sleeves are arranged and distributed along the axial direction of the main shaft.

3. The main transmission device for printing equipment according to claim 1, characterized in that: The first rotor is located radially inside the first stator.

4. The main transmission device for printing equipment according to claim 3, characterized in that: The first rotor is sleeved on the main shaft.

5. The main transmission device for printing equipment according to claim 1, characterized in that: The first stator includes a first stator winding and a first mounting side plate. The first stator winding is located inside the roller and is coaxially sleeved with the first rotor. The first mounting side plate is located outside the end side of the roller. The end of the first stator winding is fixedly mounted on the first mounting side plate. The first mounting side plate is fixedly mounted to the frame on the same side.

6. The main transmission device for a printing device according to claim 1, characterized in that: The second rotor is located radially inside the second stator.

7. The main transmission device for a printing device according to claim 6, characterized in that: The second rotor is sleeved on the main shaft.

8. The main transmission device for a printing device according to claim 1, characterized in that: The second stator includes a second stator winding and a second mounting side plate. The second stator winding is located inside the roller and is coaxially sleeved with the second rotor. The second mounting side plate is located outside the end side of the roller. The end of the second stator winding is fixedly mounted on the second mounting side plate. The second mounting side plate is fixedly mounted to the frame on the same side.

9. The main transmission device for a printing device according to claim 1, characterized in that: The first rotor and the second rotor are both rotor windings or rotor magnets.

10. The main transmission device for a printing device according to claim 1, characterized in that: The first driving assembly is a driving assembly used for low-speed operation; the second driving assembly is a driving assembly used for high-speed operation.

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