Direct-drive pinch roll device

Abstract

The direct-drive pinch roll device comprises a box body which is of a square structure, and a swing assembly is rotationally connected with the box body; the roll shaft equipment is installed on the swing assembly, one end of the roll shaft equipment is located in the swing assembly and connected with the swing assembly through the direct drive equipment, the other end of the roll shaft equipment is located on the outer side of the box body, and the control system is connected with the swing assembly. And a high-speed wire rod or a high-speed bar is positioned between the roll rings on the first pinch roll shaft and the second pinch roll shaft. According to the clamping and conveying device, the roll shaft equipment and the swing assembly are combined, the direct drive equipment drives the first clamping and conveying roll shaft and the second clamping and conveying roll shaft to rotate at a high speed and drives the swing assembly at the same time, so that the first clamping and conveying roll shaft and the second clamping and conveying roll shaft of the roll shaft equipment move up and down in the thickness direction of the box body, and therefore the stability and safety in the clamping and conveying process are ensured; and the whole device is simple in structure and convenient for operators to check and maintain, so that the production efficiency and the practicability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a direct-drive pinch roller device. Background Art

[0002] Pinch rolls are one of the important equipment in steel rolling production lines. Pinch rolls play a vital role in the production process. As the key link connecting different rolling processes, pinch rolls are not only responsible for conveying high-wire and high-bar materials (high-speed wire and high-speed bars), but also can adjust the position and speed of high-wire and high-bar materials during the rolling process to ensure rolling quality and efficiency.

[0003] In the relevant technology, the operating condition of the pinch roller device has a significant impact on the efficiency and stability of the entire steel rolling production line. The pinch roller device needs to coordinate with other equipment, such as rolling mills, cooling systems and cutting equipment, to ensure the smoothness of the entire production process. Therefore, the working condition of the pinch roller device in the steel rolling production line is directly related to the product quality and production cost.

[0004] However, the traditional pinch roller device has many parts and a complex structure, which leads to high failure rate, difficult maintenance and unstable pinching, thus seriously affecting the production efficiency of high-wire and high-bar products. Summary of the invention

[0005] In order to solve the problems of traditional pinch roller devices, which have many parts and complex structure, resulting in high failure rate, difficult maintenance and unstable pinching, the present invention provides a direct-drive pinch roller device, and the technical solution adopted is as follows: A direct-drive pinch roller device, used for high-speed wire and high-speed bar, comprising: The box body has a cubic structure and is used to limit the inner cavity; A swing assembly is located in the inner cavity and is rotatably connected to the box body; A roller device is installed on the swing assembly, one end of the roller device is located inside the swing assembly and connected to the swing assembly through a direct drive device, and the other end of the roller device is located outside the box; A control system, which is arranged on a side of the swing assembly away from the roller device and connected to the swing assembly, and is used to control the swinging action of the swing assembly; Wherein, the roller device includes a first pinch roller and a second pinch roller, the high-speed wire or the high-speed rod is located between the roller rings on the first pinch roller and the second pinch roller, and in the assembled state, the swing assembly is driven to drive the first pinch roller and the second pinch roller to move up and down along the thickness direction of the box.

[0006] In some embodiments, the swing assembly consists of a first swing arm and a second swing arm. The first swing arm and the second swing arm are arranged up and down along the thickness direction of the box body, and are both rotatably connected to the box body through a support shaft so that the first swing arm and the second swing arm can approach or separate from each other.

[0007] In some embodiments, the first swing arm and the second swing arm are both conical structures, and the first swing arm and the support shaft are an integral structure; and / or the second swing arm and the support shaft are an integral structure.

[0008] In some embodiments, the first pinch roller shaft has a first fixed end and a first connecting end, the first fixed end is rotatably connected to the first swing arm through the direct drive device, and the first connecting end extends to the outside of the box body, and the second pinch roller shaft has a second fixed end and a second connecting end, the second fixed end is rotatably connected to the second swing arm through the direct drive device, and the second connecting end extends to the outside of the box body.

[0009] In some embodiments, the roller ring is located on the connecting end, wherein a first roller ring is disposed on the first connecting end, and a second roller ring is disposed on the second connecting end, and the first roller ring and the second roller ring are symmetrically disposed.

[0010] In some embodiments, the direct drive device drives the first pinch roller and the second pinch roller to rotate highly, wherein the direct drive device includes a stator and a rotor, and in an assembled state, the stator is integrated with the first swing arm, and the rotor is integrated with the first fixed end; and / or, the stator is integrated with the second swing arm, and the rotor is integrated with the second fixed end.

[0011] In some embodiments, a limit assembly is provided on the box body, and the limit assembly includes a first stop block and a second stop block. Along the thickness direction of the box body, the first stop block and the second stop block are arranged up and down and located at one end of the first swing arm to limit the swing position of the first swing arm.

[0012] In some embodiments, the control system simultaneously controls the first swing arm and the second swing arm so that a preset angle is set between the first swing arm and the second swing arm. When one end of the first swing arm is at the first stop block, a first preset angle is set between the first swing arm and the second swing arm so that the first swing arm and the second swing arm are close to each other. When one end of the first swing arm is at the second stop block, a second preset angle is set between the first swing arm and the second swing arm so that the first swing arm and the second swing arm are separated from each other.

[0013] In some embodiments, a first oil film bearing and a plurality of first angular contact ball bearings are mounted on the first pinch roller shaft, and the first oil film bearing and the plurality of first angular contact ball bearings are both located at two ends of the first pinch roller shaft.

[0014] In some embodiments, a second oil film bearing and a plurality of second angular contact ball bearings are mounted on the second pinch roller shaft, and the second oil film bearing and the plurality of second angular contact ball bearings are both located at two ends of the second pinch roller shaft.

[0015] Compared with the prior art, the present invention has the following technical advances: In the present invention, a roller device and a swing assembly are combined. In the assembled state, the direct drive device drives the first pinching roller and the second pinching roller to rotate at high speed, and at the same time drives the swing assembly to make the first pinching roller and the second pinching roller of the roller device move up and down along the thickness direction of the box body, thereby ensuring stability and safety during the pinching process. The entire device has a simple structure, which is convenient for operators to check and maintain, thereby improving production efficiency and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] In the attached picture: Figure 1 is a schematic diagram of a direct-drive pinch roller device of the present invention; Figure 2 for Figure 1 Schematic diagram of the cross section of AA; Figure 3 is a side view of the direct-drive pinch roller device of the present invention; Figure 4 is a cross-sectional schematic diagram of the direct-drive pinch roller device of the present invention; Figure 5 A schematic side view of a swing assembly and a roller device; Figure 6 A diagram showing the use status of a swing assembly and a roller device in an example; Figure 7 This is a diagram of the usage status of the swing assembly and roller device in another example.

[0018] In the figure: 1. box body; 100. inner cavity; 2. swing assembly; 20. first swing arm; 21. second swing arm; 3. roller device; 30. first pinch roller; 301. first fixed end; 302. first connecting end; 31. second pinch roller; 311. first fixed end; 312. first connecting end; 4. control system; 5. direct drive device; 50. stator; 51. rotor; 6. support shaft; 7. first roller ring; 8. second roller ring; 9. limit assembly; 90. first stopper; 91. second stopper; 10. first oil film bearing; 11. first angular contact ball bearing; 12. second oil film bearing; 13. second angular contact ball bearing; 14. first preset angle; 15. second preset angle. DETAILED DESCRIPTION

[0019] The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0020] like Figures 1 to 7 As shown, the present invention discloses a direct-drive pinch roller device, which is applied to high-speed wire and high-speed bar, and includes a box 1, a swing component 2, a roller device 3 and a control system 4, wherein the box 1 is a square structure, and the box 1 adopts a steel plate welding structure, and has high structural stability and strength. During the operation of the device, the box 1 also has the characteristics of thin oil lubrication and cooling, thereby improving the installation and normal use of the device. The box 1 is used to limit the inner cavity 10 to ensure the normal operation of the components in the inner cavity 10 and prevent the components from being damaged by collision. The swing component 2 is located in the inner cavity 10 and has a good rotation connection function. The swing component 2 is rotationally connected with the box 1 so that the swing component 2 performs flexible swinging motion in the inner cavity 10. The swing amplitude and frequency of the swing component 2 can be adjusted to meet the conveying requirements of different product specifications. The main function of the swing component 2 is to provide an adjustable installation platform for the roller device 3. In the assembled state, by driving the swinging action of the swing component 2, the roller device 3 can be moved accordingly, thereby realizing the precise pinching and feeding of high-speed wire or high-speed bar.

[0021] Continue to refer Figures 1 to 7The roller device 3 is installed on the swing component 2 and can move synchronously with the swinging action of the swing component 2. One end of the roller device 3 is located inside the swing component 2 and is connected to the swing component 2 through the direct drive device 5. The other end is located outside the box 1. The direct drive device 5 directly drives the load without going through the traditional mechanical transmission link. The direct drive device 5 can be a permanent magnet DC motor or an AC motor. In one example, the direct drive device 5 is a permanent magnet DC motor. The permanent magnet DC motor converts electrical energy into mechanical energy and uses permanent magnets to establish a magnetic field. The conversion of electrical energy is achieved through the interaction between current and magnetic field. When the device is running, the permanent magnet DC motor is driven, and the roller device 3 can achieve precise high-speed rotational motion, avoiding delays and errors that may occur in traditional mechanical transmission structures. The other end of the roller device 3 extends out of the outside of the box 1 and directly contacts the processed high-speed wire or high-speed bar through the roller ring, thereby performing operations such as clamping and conveying. In another example, the surface of the roller device 3 can be made of special materials or coatings, such as metal coatings or resin coatings, as needed to improve its wear resistance and corrosion resistance.

[0022] like Figures 1 to 5 As shown, the control system 4 is arranged on the side of the swing component 2 away from the roller device 3, and the output end of the control system 4 is connected to the swing component 2. The control system 4 is used to control the swinging movements of the swing component 2, such as the speed and transposition direction. The control system 4 can be a pneumatic motor control system, a hydraulic motor control system, or a servo motor control system. As long as it can control the roller device 3, there is no excessive restriction in this regard in the present application. The roller device 3 includes a first pinching roller 30 and a second pinching roller 31, and the high-speed wire or high-speed rod is located between the first pinching roller 30 and the second pinching roller 31. In one example, the control system 4 first drives the swinging movement of the swing component 2 by setting parameters, so as to drive the first pinching roller 30 and the second pinching roller 31 of the roller device 3 to move in the thickness direction of the box body 1 (such as Figure 3 The z direction shown in ) moves up and down, and the moving direction (as shown in Figure 3 The z direction shown in ) and the conveying direction of high-speed wire or high-speed rod (as shown in Figure 3 By adjusting the position of the roller device 3, that is, the roller devices 3 are moved closer to or away from each other to clamp or release the high-speed wire or high-speed rod, accurate clamping and delivery of the high-speed wire or high-speed rod can be achieved. Since a direct drive device 5 is used between the swing component 2 and the roller device 3, the entire driving process has higher accuracy and response speed, thereby achieving the clamping and delivery of the high-speed wire or high-speed rod.

[0023] In some embodiments, Figures 1 to 5 As shown in FIG, the swing assembly 2 is composed of a first swing arm 20 and a second swing arm 21, and is arranged along the thickness direction of the box body 1 (eg Figure 3 The first swing arm 20 and the second swing arm 21 are arranged up and down, and are both rotatably connected to the box body 1 through the support shaft 6, thereby forming a rotatable installation structure. The support shaft 6 is to provide a stable rotation fulcrum for the first swing arm 20 and the second swing arm 21, which can rotate around the circumferential direction of the support shaft 6 (such as Figure 5 When the device is running, the movement of the first swing arm 20 and the second swing arm 21 is precisely controlled by the control system 4. The control system 4 adjusts the swinging movement of the swing arm according to the production requirements. When the control system 4 drives the first swing arm 20 and the second swing arm 21 to approach each other, a clamping force is generated between the roller devices 3, which can clamp the high-speed wire or high-speed rod passing through to ensure that the clamping force is moderate and does not damage the material. When the control system 4 drives the first swing arm 20 and the second swing arm 21 to separate from each other, the clamping force between the roller devices 3 disappears, so that the clamped high-speed wire or high-speed rod can be moved out of the processing area and replaced, so that the device can process materials of different diameters or specifications, thereby improving the adaptability and flexibility of the device.

[0024] like Figures 5 to 7 As shown, the first swing arm 20 and the second swing arm 21 are both conical structures. The conical structures of the first swing arm 20 and the second swing arm 21 can have better swinging force and stability. The first swing arm 20 and the second swing arm 21 can be separate structures from the support shaft 6, or can be an integral structure. In one example, the first swing arm 20 and the support shaft 6 are an integral structure, and the second swing arm 21 and the support shaft 6 are an integral structure, so as to ensure the vibration resistance and stability of the first swing arm 20 and the second swing arm 21 during operation.

[0025] In some embodiments, Figures 1 to 4 As shown, the first pinching roller 30 has a first fixed end 301 and a first connecting end 302, the first fixed end 301 is rotatably connected to the first swing arm 20 through the direct drive device 5, and the first connecting end 302 extends to the outside of the box body 1, and the second pinching roller 31 has a second fixed end 311 and a second connecting end 312, the second fixed end 311 is rotatably connected to the second swing arm 21 through the direct drive device 5, and the second connecting end 312 extends to the outside of the box body 1, and simultaneously drives the first swing arm 20 and the second swing arm 21, and drives the first pinching roller 30 and the second pinching roller 3 to move up and down through the direct drive device 5, so as to clamp and convey high-speed wire or high-speed plate, thereby improving transportation efficiency and facilitating maintenance and adjustment by operators.

[0026] In some embodiments, Figure 3As shown, the roller rings are located on the connecting ends, wherein a first roller ring 7 is provided on the first connecting end 302, and a second roller ring 8 is provided on the second connecting end 312, the first roller ring 7 and the second roller ring 8 are symmetrically arranged, and the surfaces of the first roller ring 7 and the second roller ring 8 have rough surfaces, which can effectively prevent the slippage of the high-speed wire or high-speed rod during the clamping and conveying process during the operation of the device, and at the same time improve the uniformity of clamping, thereby ensuring the stability and safety of the high-speed wire or high-speed rod.

[0027] In some embodiments, Figures 1 to 4 As shown, the direct drive device 5 drives the first pinch roller 30 and the second pinch roller 31 to rotate at high speed, wherein the direct drive device 5 includes a stator 50 and a rotor 51, wherein the stator 50 is provided with a coil generating an electromagnetic driving force, the stator 50 is integrated with the swing assembly 2, and the rotor 51 can be made of a permanent magnetic material and is interference-mounted on the roller device 3. In one example, continue to refer to Figures 1 to 4 There are two direct-drive devices 5. The stator 50 of the first direct-drive device 5 is integrated with the first swing arm 20, and an oil cooling device is provided between the two to ensure the normal operation of the device and prevent the device from overheating and affecting subsequent work. The rotor 51 of the first direct-drive device 5 is integrated with the first fixed end 301 of the first pinching roller shaft 30, and the stator 50 of the second direct-drive device 5 is integrated with the second swing arm 21, and an oil cooling device is provided between the two to ensure the normal operation of the device and prevent the device from overheating and affecting subsequent work. The rotor 51 is integrated with the second fixed end 310 of the second pinching roller shaft 31, thereby realizing the simultaneous operation of the swing assembly 2 and the roller device 3.

[0028] In some embodiments, Figure 1 , Figures 5 to 7 As shown, a limit assembly 9 is provided on the box body 1, and the limit assembly 9 includes a first stopper 91 and a second stopper 92, which are arranged along the thickness direction of the box body 1 (such as Figure 5 As shown in the z direction, the first stopper 91 and the second stopper 92 are arranged up and down and are located at one end of the first swing arm 20. When the first swing arm 20 drives the second swing arm 21 to swing, the swing position and path will be restricted by the first stopper 91 and the second stopper 92, ensuring that the movement of the second swing arm 21 driven by the first swing arm 20 will not affect other components, thereby forming an effective physical barrier to prevent the first swing arm 20 from driving the second swing arm 21 beyond a predetermined swing range, thereby ensuring stability and safety.

[0029] In some embodiments, Figures 5 to 7As shown, the control system 4 controls the first swing arm 20 and the second swing arm 21 at the same time, so that the connection line between one side of the first swing arm 20 and one side of the second swing arm 21 has a preset angle, and the preset angle is between 5° and 60°. When one end of the first swing arm 20 is at the first stopper 91, there is a first preset angle 14 between the first swing arm 20 and the second swing arm 21, which is the minimum angle. Figure 6 As shown, the first swing arm 20 and the second swing arm 21 are brought close to each other, so as to clamp and convey the high-speed wire or high-speed rod. When one end of the first swing arm 20 is at the second stopper 92, there is a second preset angle 15 between the first swing arm 20 and the second swing arm 21. Figure 7 As shown, at this time, the angle is the maximum, so that the first swing arm 20 and the second swing arm 21 are separated from each other, so that the high-speed wire or high-speed rod can be released for replacement and other operations.

[0030] In some embodiments, Figure 2 As shown, the first pinch roller shaft 30 is mounted with a first oil film bearing 10 and a plurality of first angular contact ball bearings 11. The first oil film bearing 10 provides excellent lubrication performance and support force to ensure smoothness and stability during the operation of the device. Due to the presence of the first oil film bearing 10, the first pinch roller shaft 30 can effectively reduce friction and wear, thereby extending the service life of the device. The plurality of first angular contact ball bearings 11 are used to limit the position of the first pinch roller shaft 30 in the first swing arm 20 to ensure that the position will not be offset or moved during operation, thereby ensuring the stability and installability of the device. In one example, the first oil film bearing 10 is located at the first fixed end 301 close to the first pinch roller shaft 30, and two of the plurality of first angular contact ball bearings 11 are provided, both of which are located at the first connecting end 302 close to the first pinch roller shaft 30.

[0031] In some embodiments, a second oil film bearing 12 and a plurality of second angular contact ball bearings 13 are mounted on the second pinch roller shaft 31. The second oil film bearing 12 provides excellent lubrication performance and support force to ensure smoothness and stability during the operation of the device. Due to the presence of the second oil film bearing 12, the second pinch roller shaft 31 can effectively reduce friction and wear, thereby extending the service life of the device. The plurality of first angular contact ball bearings 11 are used to limit the position of the second pinch roller shaft 31 in the second swing arm 21 to ensure that the position will not be offset or moved during operation, thereby ensuring the stability and installability of the device. In one example, the second oil film bearing 12 is located at the second fixed end 311 close to the second pinch roller shaft 31, and two of the plurality of first angular contact ball bearings 11 are provided, both of which are located at the second connecting end 312 close to the second pinch roller shaft 31.

[0032] The working principle of a direct-drive pinch roller device of the present application is: like Figures 1 to 7As shown, first, the first swing arm 20 and the second swing arm 21 of the swing assembly 2 are installed in the inner cavity 100 of the box body 1 through the support shaft 6, and the control system 4 controls the swinging action of the first swing arm 20 and the second swing arm 21 at the same time. Then, the first pinch roller 30 and the second pinch roller 31 of the roller device 3 are connected to the first swing arm 20 and the second swing arm 21 of the swing assembly 2 through the direct drive device 5. During the operation of the device, the control system 4 drives the swinging action of the first swing arm 20 and the second swing arm 21 of the swing assembly 2 by setting parameters, so that the first pinch roller 30 and the second pinch roller 31 are moved along the thickness direction of the box body 1 (such as Figure 3 , and the first swing arm 20 moves up and down (in the z direction shown in the figure), and the limit assembly 9 can effectively limit the swing amplitude of the first swing arm 20 to ensure that the swing action is within a preset range, that is, the first pinching roller 30 and the second pinching roller 31 approach and separate from each other, turn on the control system 4, drive the first swing arm 20 and the second swing arm 21, and at the same time drive the first pinching roller 30 and the second pinching roller 31 to approach each other, at this time, there is a clamping force between the first pinching roller 30 and the second pinching roller 31, and clamp the high-speed wire or high-speed plate, the direct drive device 5 drives the first pinching roller 30 and the second pinching roller 31 to rotate at a high speed, so as to carry out conveying and subsequent operations, when the conveying is completed or the high-speed wire or high-speed plate needs to be replaced, by adjusting the parameters of the control system 4, drive the first swing arm 20 and the second swing arm 21 and at the same time drive the first pinching roller 30 and the second pinching roller 31 to separate from each other, so that the clamping force between the first pinching roller 30 and the second pinching roller 31 disappears, thereby completing the conveying and replacement work.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A direct-drive pinch roller device, characterized in that: Applications for high-speed wire or high-speed rod, including: The box body has a cubic structure and is used to limit the inner cavity; A swing assembly is located in the inner cavity and is rotatably connected to the box body; A roller device is installed on the swing assembly, one end of the roller device is located inside the swing assembly and connected to the swing assembly through a direct drive device, and the other end of the roller device is located outside the box; A control system, which is arranged on a side of the swing assembly away from the roller device and connected to the swing assembly, and is used to control the swinging action of the swing assembly; Wherein, the roller device includes a first pinch roller and a second pinch roller, the high-speed wire or the high-speed rod is located between the roller rings on the first pinch roller and the second pinch roller, and in the assembled state, the swing assembly is driven to drive the first pinch roller and the second pinch roller to move up and down along the thickness direction of the box.

2. A direct-drive pinch roller device according to claim 1, characterized in that: The swing assembly consists of a first swing arm and a second swing arm. The first swing arm and the second swing arm are arranged up and down along the thickness direction of the box body, and are both rotatably connected to the box body through a support shaft so that the first swing arm and the second swing arm can approach or separate from each other.

3. A direct-drive pinch roller device according to claim 2, characterized in that: The first swing arm and the second swing arm both have a conical structure, and the first swing arm and the support shaft are an integral structure; and / or the second swing arm and the support shaft are an integral structure.

4. A direct-drive pinch roller device according to claim 2, characterized in that: The first pinching roller shaft has a first fixed end and a first connecting end, the first fixed end is rotatably connected to the first swing arm through the direct drive device, and the first connecting end extends to the outside of the box body, and the second pinching roller shaft has a second fixed end and a second connecting end, the second fixed end is rotatably connected to the second swing arm through the direct drive device, and the second connecting end extends to the outside of the box body.

5. A direct-drive pinch roller device according to claim 4, characterized in that: The roller ring is located on the connecting end, wherein the first connecting end is provided with a first roller ring, the second connecting end is provided with a second roller ring, and the first roller ring and the second roller ring are symmetrically arranged.

6. A direct-drive pinch roller device according to claim 4, characterized in that: The direct drive device drives the first pinch roller shaft and the second pinch roller shaft to rotate highly, wherein the direct drive device includes a stator and a rotor, and in an assembled state, the stator is integrated with the first swing arm, and the rotor is integrated with the first fixed end; and / or, the stator is integrated with the second swing arm, and the rotor is integrated with the second fixed end.

7. A direct-drive pinch roller device according to claim 2, characterized in that: A limit assembly is provided on the box body, and the limit assembly includes a first stop block and a second stop block. Along the thickness direction of the box body, the first stop block and the second stop block are arranged up and down and located at one end of the first swing arm to limit the swing position of the first swing arm.

8. A direct-drive pinch roller device according to claim 7, characterized in that: The control system simultaneously controls the first swing arm and the second swing arm so that a preset angle is set between the first swing arm and the second swing arm. When one end of the first swing arm is at the first stop block, a first preset angle is set between the first swing arm and the second swing arm so that the first swing arm and the second swing arm are close to each other. When one end of the first swing arm is at the second stop block, a second preset angle is set between the first swing arm and the second swing arm so that the first swing arm and the second swing arm are separated from each other.

9. A direct-drive pinch roller device according to claim 1, characterized in that: A first oil film bearing and a plurality of first angular contact ball bearings are installed on the first pinch roller shaft, and the first oil film bearing and the plurality of first angular contact ball bearings are both located at two ends of the first pinch roller shaft.

10. A direct-drive pinch roller device according to claim 1, characterized in that: A second oil film bearing and a plurality of second angular contact ball bearings are mounted on the second pinch roller shaft, and the second oil film bearing and the plurality of second angular contact ball bearings are both located at two ends of the second pinch roller shaft.

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