Strip threading tension roller device

Abstract

The invention provides a threading tension roller device, and relates to the technical field of rolling, the threading tension roller device comprises a tension roller, a roller frame, a rack, a rotation driving assembly and a belt guiding assembly, the tension roller is arranged on the rack through the roller frame, the tension roller is configured to rotate around the axis of the tension roller relative to the roller frame, and the rotation driving assembly is arranged on the rack. The roller frame is rotationally installed on the machine frame and driven by the rotary driving assembly so that the tension roller can be switched between a belt penetrating position and a working position, and the belt guiding assembly is matched with the tension roller and used for guiding a belt penetrating through the tension roller when the tension roller is located at the belt penetrating position. The problem that a traditional tension roller set is difficult in strip threading is solved, and the production efficiency of steel rolling equipment such as a temper mill unit can be improved.

Description

Technical Field

[0001] This invention relates to the field of rolling technology, and more specifically, to a belt threading tension roller device. Background Technology

[0002] Tension rollers are commonly used components in strip steel production units. After the strip is wound on the tension roller, the friction between the tension roller body and the strip drives the strip to move while applying tension to the strip, thus creating a tension difference between the inlet and outlet of the tension roller.

[0003] In related technologies, when the strip is threaded, it needs to be wound on the tension roller in conjunction with the fixed position of the tension roller, which makes threading difficult. This is especially true for leveling units that produce single rolls, where each roll needs to be threaded, which greatly reduces the production efficiency of leveling units and other equipment. Summary of the Invention

[0004] The present invention aims to solve the problem of difficulty and low efficiency in threading the strip on the tension roller.

[0005] To address the aforementioned problems, the present invention provides a tension roller device, comprising a tension roller, a roller frame, a frame, a rotary drive assembly, and a belt guide assembly. The tension roller is mounted on the frame via the roller frame and is configured to rotate relative to the roller frame about its own axis. The roller frame is rotatably mounted on the frame and driven by the rotary drive assembly to switch the tension roller between a threading position and a working position. The belt guide assembly cooperates with the tension roller and is used to guide the belt material threaded onto the tension roller when the tension roller is in the threading position.

[0006] Optionally, the tension rollers are provided in at least two sets, and the two sets of tension rollers are symmetrically arranged on the roller frame along the belt threading direction of the strip.

[0007] Optionally, the tension roller includes a drive motor and a tension roller body, the tension roller body being disposed on the roller frame and configured to rotate relative to the roller frame about its own axis, and the drive motor being used to drive the tension roller body to rotate.

[0008] Optionally, the drive motor is an external rotor motor and is built into the tension roller body. The stator of the external rotor motor is located at the axial center of the tension roller body and is connected to the roller frame. The tension roller body is connected to the rotor of the external rotor motor.

[0009] Optionally, the roller frame includes a frame body and a rotating shaft disposed at the center of both sides of the frame body. The tension roller is disposed on the frame body, and the frame body is rotatably connected to the machine frame through the rotating shaft. The rotation drive assembly is used to drive the rotating shaft to rotate, so that the tension roller switches between the belt threading position and the working position.

[0010] Optionally, the tension roller assembly further includes an energy supply component that supplies electrical energy and / or cooling water to the tension roller via the rotating shaft.

[0011] Optionally, when the tension roller is in the threading position, the roller frame is in an inclined state; when the tension roller is in the working position, the roller frame is in a horizontal state. The guide belt assembly has two sets, symmetrically arranged along the central axis of the frame. Each guide belt assembly includes a rotating connecting rod and a guide plate. One end of the rotating connecting rod is rotatably connected to the frame and configured to rotate relative to the frame. The other end of the rotating connecting rod is fixedly connected to the guide plate, so that when the tension roller is in the threading position, the opposite ends of the guide plates of the two sets of guide belt assemblies pass through the inclined roller frame and form guide plates for guiding the strip. When the tension roller is in the working position, the guide plates of the two sets of guide belt assemblies separate and move away from the roller frame.

[0012] Optionally, the guide plate includes a main body and a sub-guide plate. The main body is fixedly connected to the other end of the rotating linkage of the corresponding guide belt assembly. The sub-guide plate is configured to be retractably connected to the main body. The main body is provided with a slide rail adapted to the sub-guide plate. When the tension roller is in the belt threading position, the guide plate is close to the roller frame, and the sub-guide plate extends out of the slide rail. When the tension roller is in the working position, the guide plate is away from the roller frame, and the sub-guide plate retracts into the main body through the slide rail.

[0013] Optionally, the guide belt assembly further includes a first telescopic member, one end of which is hinged to the frame and the other end of which is hinged to the rotating link.

[0014] Optionally, the tension roller assembly further includes a locking component for locking the roller frame when the tension roller is in the threading position and / or working position.

[0015] The beneficial effects of the tension roller device of the present invention are as follows: the tension roller is configured to rotate relative to the roller frame around its own axis. The roller frame is rotatably mounted on the machine frame and driven by a rotary drive assembly. Under the drive of the roller frame, the tension roller can be in a suitable threading angle. After threading is completed, it can return to the working position, realizing the switching of the tension roller between the threading position and the tension working position, which facilitates the winding of the strip on the tension roller and solves the problem of difficult threading of traditional tension roller groups. Furthermore, by setting the guide assembly, the strip is guided when the tension roller is in the threading position, which further reduces the difficulty of operating the strip between the tension roller and the roller frame and can improve the production efficiency of rolling mill equipment such as leveling units. Attached Figure Description

[0016] Figure 1This diagram illustrates the operation of a belt tension roller device in the working position according to an embodiment of the present invention. Figure 2 This diagram illustrates the operation of a belt threading tension roller device in the belt threading position according to an embodiment of the present invention. Figure 3 This diagram shows a top view of the tension roller device without a guide belt assembly in an embodiment of the present invention. Figure 4 This diagram illustrates the structure of the guide plate retracting into the main body at the working position in an embodiment of the present invention. Figure 5 This diagram shows a top view of the structure of the guide plate extending from the main body at the strap insertion position in an embodiment of the present invention. Figure 6 The diagram shows a bottom view of the structure of the guide plate extending from the main body at the strap insertion position in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Tension roller; 2. Roller frame; 3. Machine frame; 4. Drive motor; 5. Tension roller body; 6. Energy supply assembly; 7. Locking assembly; 8. Rotary drive assembly; 9. Strip; 10. Shaft; 11. Guide belt assembly; 11. Guide belt assembly; 11. First telescopic component; 11. Rotating connecting rod; 11. Guide plate component; 113. Main body; 1132. Dividing guide plate; 1133. Second telescopic component; 12. Mandrel; 13. Frame. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] In the attached diagram, the Z-axis represents the vertical direction, i.e., up and down, with the positive direction of the Z-axis representing upward and the negative direction representing downward. The Y-axis represents the horizontal direction and is designated as front and back, with the positive direction of the Y-axis representing the front and the negative direction representing the back. The X-axis represents the left and right direction, with the positive direction of the X-axis representing the right and the negative direction representing the left. It should be noted that the aforementioned representations of the Z, Y, and X axes are merely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element 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 the invention.

[0020] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or illustrative implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0021] Reference Figure 1 and Figure 2 As shown, this embodiment of the invention proposes a tension roller device, including a tension roller 1, a roller frame 2, a frame 3, a rotary drive assembly 8, and a guide assembly 11. The tension roller 1 is mounted on the frame 3 via the roller frame 2. The tension roller 1 is configured to rotate relative to the roller frame 2 about its own axis. The roller frame 2 is rotatably mounted on the frame 3 and driven by the rotary drive assembly 8 to switch the tension roller 1 between a threading position and a working position. The guide assembly 11 cooperates with the tension roller 1 and is used to guide the strip 9 threaded onto the tension roller 1 when the tension roller 1 is in the threading position.

[0022] Specifically, tension rollers 1 can be set in one or more sets. Tension rollers 1 are mounted on roller holders 2 and can be driven to rotate by a power element (e.g., roller holders 2 are mounted on tension rollers 1 and connected to a built-in external rotor motor). Roller holders 2 are rotatably mounted on the frame 3. A rotation drive assembly 8 can drive roller holders 2 to rotate at a set angle. Thus, tension rollers 1 can switch between the threading position and the tension working position. In the threading position, for example, by placing roller holders 2 in a suitable tilt state, it is convenient to wind the strip 9 onto the tension roller at a suitable angle and orientation. On the tension roller 1, the strip 9 is threaded through, satisfying the conditions for generating tension. After threading, the roller is switched to the working position, for example, when the roller frame 2 is in a horizontal state. The guide belt assembly 11 guides and directs the strip 9, reducing the difficulty of controlling the strip 9 during threading and winding. The guide belt assembly 11 can be a retractable guide plate along the direction of the strip 9 entering the tension roller 1. When the tension roller 1 is in the threading position, the guide plate extends to guide the tension roller 1. When the tension roller 1 is in the tension working state, the guide plate is in the retracted state and will not affect the working process of the tension roller 1.

[0023] In this embodiment, the tension roller 1 is configured to rotate relative to the roller frame 2 around its own axis. The roller frame 2 is rotatably mounted on the frame 3 and driven by the rotation drive assembly 8. Under the drive of the roller frame 2, the tension roller 1 can be in a suitable threading angle. After threading, it can return to the working position, realizing the switching of the tension roller 1 between the threading position and the tension working position. This facilitates the winding of the strip on the tension roller 1 and solves the problem of difficult threading of traditional tension roller groups. Furthermore, by setting the guide assembly 11, the strip 9 is guided when the tension roller 1 is in the threading position, which further reduces the operation difficulty of the strip 9 between the tension roller 1 and the roller frame 2 and can improve the production efficiency of rolling mill equipment such as the leveling unit.

[0024] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, the tension roller 1 is provided with at least two sets, and the two sets of tension roller 1 are symmetrically arranged on the roller frame 2 along the threading direction of the strip 9.

[0025] Specifically, tension rollers typically consist of two sets of tension rollers 1, such as Figure 2 As shown, the strip 9 is wound between two sets of tension rollers 1, which produces the best tension effect. In addition, while meeting the requirement of quickly driving the strip 9 to run, at least two sets of tension rollers 1 achieve the overall balance of the roller frame 2, making it easier to switch between the belt threading position and the working position.

[0026] like Figure 3 As shown, in an optional embodiment of the present invention, the tension roller 1 includes a drive motor 4 and a tension roller body 5. The tension roller body 5 is disposed on the roller frame 2 and configured to rotate relative to the roller frame 2 about its own axis. The drive motor 4 is used to drive the tension roller body 5 to rotate.

[0027] Specifically, the tension roller body 5 is mounted on the roller frame 2, which is an H-shaped support. In one possible case, the tension roller body 5 is rotatably mounted on the roller frame 2 via a bearing seat and driven by an external rotor motor. Of course, other cases are also possible, such as the case described in the following embodiment. Thus, the tension roller body 5 can be driven to move by the friction between the tension roller body 5 and the strip 9 while applying tension to the strip 9, thereby causing the strip 9 to generate a tension difference at the inlet and outlet of the tension roller, thus driving the strip 9 to run.

[0028] like Figure 3 As shown, in an optional embodiment of the present invention, the drive motor 4 is an external rotor motor and is built into the tension roller body 5. The stator of the external rotor motor is located at the axial center of the tension roller body 5 and is connected to the roller frame 2. The tension roller body 5 is connected to the rotor of the external rotor motor.

[0029] Specifically, the external rotor motor has an external rotor and an internal stator, which is different from the commonly used internal rotor motor (all other motors mentioned in this invention are internal rotor motors). The drive motor 4 is located in the inner cavity of the tension roller body 5. The motor housing is fitted onto the rotor and fixedly connected to the tension roller body 5 to drive the tension roller body 5 to rotate. The tension roller body 5 is hollow and also includes a spindle 12. The spindle 12 is coaxially arranged with the tension roller body 5 and fixed to the stator. Both ends of the spindle 12 extend out of the tension roller body 5 and are used to fix them to the roller frame 2. That is, the stator is fixed to the roller frame 2 through the spindle 12. By directly integrating the motor into the tension roller body 5, the cost of transmission structures such as couplings can be eliminated, and it is convenient to realize the overall rotation of the tension roller 1 driven by the roller frame 2.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, in an optional embodiment of the present invention, the roller frame 2 includes a frame body 13 and a rotating shaft 10 disposed at the center of both sides of the frame body 13. The tension roller 1 is disposed on the frame body 13. The frame body 13 is rotatably connected to the machine frame 3 through the rotating shaft 10. The rotation drive assembly 8 is used to drive the rotating shaft 10 to rotate so that the tension roller 1 switches between the belt threading position and the working position.

[0031] Specifically, the frame 3 is equipped with a rotary drive assembly 8, which drives the rotating shaft 10 to rotate the roller frame 2, thereby realizing the switching of the tension roller group between the belt threading position and the tension working position. The rotary drive assembly 8 is a combination of a motor and a gear, with the gear mounted on the rotating shaft. The motor can be a servo motor. The motor can have a self-locking function to maintain the stability of the tension roller 1 and the roller frame 2 in the belt threading position and / or the working position.

[0032] like Figure 3 As shown, in an optional embodiment of the present invention, the belt tension roller device further includes an energy supply component 6, which supplies electrical energy and / or cooling water to the tension roller 1 through the rotating shaft.

[0033] Specifically, the energy supply component 6 supplies power and / or cooling water and other media to the drive motor 4. The energy supply component includes a power supply slip ring that cooperates with the power receiving end of the drive motor 4, and / or a rotary joint. The power supply slip ring supplies power to the motor, and the rotary joint supplies cooling water and other media to the motor. The energy supply component 6 is mounted on the rotating shaft 10, so that the rotation of the roller frame 2 will not affect the supply of power and / or cooling water and other media.

[0034] like Figure 1 and Figure 2As shown, as an optional embodiment of the present invention, exemplarily, when the tension roller 1 is in the threading position, the roller frame 2 is in an inclined state; when the tension roller 1 is in the working position, the roller frame 2 is in a horizontal state. Two sets of guide belt assemblies 11 are provided, symmetrically arranged along the central axis of the frame 3. Each guide belt assembly 11 includes a rotating connecting rod 112 and a guide plate 113. One end of the rotating connecting rod 112 is rotatably connected to the frame 3 and configured to rotate relative to the frame 3. The other end of the rotating connecting rod 112 is fixedly connected to the guide plate 113, so that when the tension roller 1 is in the threading position, the opposite ends of the guide plates 113 of the two sets of guide belt assemblies 11 pass through the inclined roller frame 2 and form guide plates for guiding the strip 9. When the tension roller 1 is in the working position, the guide plates 113 of the two sets of guide belt assemblies 11 separate and move away from the roller frame 2.

[0035] Specifically, the guide belt assembly 11 is provided in two sets and symmetrically arranged at both ends of the frame 3. The rotating connecting rod 112 is used to drive the guide plate 113 to rotate, thereby realizing the engagement between the guide plate 113. The rotating connecting rod 112 can be rotated by a hydraulic telescopic rod or a stepper motor. Thus, when the tension roller 1 is in the belt threading position, the roller frame 2 is in an inclined state, one tension roller 1 is in a high position, and the other tension roller 1 is in a relatively low position. The guide plate 113 of the two sets of guide belt assemblies 11 passes through the gap of the roller frame 2 (the gap between the two sets of tension rollers). Between 1 and 2, a guide plate is formed, at which time the strip 9 can pass through the surface of the guide plate and then be wound on the corresponding tension roller 1, thereby realizing the belt threading guidance; conversely, when the tension roller 1 is in the working position, the roller frame 2 is in a horizontal state, the rotating connecting rod 112 rotates in the opposite direction, and the guide plate parts 113 of the two sets of belt guide assemblies 11 move away from each other and away from the roller frame 2, so as not to affect the effect of the tension roller 1 on the strip 9; the above-mentioned setting of the belt guide assembly 11 further reduces the difficulty of belt threading of the tension roller group and is conducive to improving the belt threading efficiency.

[0036] like Figure 2 , Figure 4 and Figure 5As shown, in an optional embodiment of the present invention, the guide plate 113 includes a main body 1131 and a sub-guide plate 1132. The main body 1131 is fixedly connected to the other end of the rotating connecting rod 112 of the corresponding guide belt assembly 11. The sub-guide plate 1132 is configured to be retractably connected to the main body 1131. The main body 1131 is provided with a slide rail adapted to the sub-guide plate 1132. When the tension roller 1 is in the belt threading position, the guide plate 113 is close to the roller frame 2, and the sub-guide plate 1132 extends out of the slide rail. When the tension roller 1 is in the working position, the guide plate 113 is away from the roller frame 2, and the sub-guide plate 1132 retracts into the main body 1131 through the slide rail.

[0037] Specifically, guide plates 113 are respectively disposed on both sides of the frame 3 in the belt threading direction. When the tension roller 1 is in the belt threading position, the roller frame 2 is in an inclined state. By driving the rotating connecting rods 112 on both sides to rotate, in the extreme state (such as rotating 90 degrees), for the guide plates 113 on both sides, the guide plates 1132 extend from the slide rails on the main body 1131 and are inserted into the gap between the two tension rollers 1. The opposite ends of the two guide plates 1132 are close together (the gap is very small and does not affect the guidance) or in contact to form a guide. The guide plate and the strip 9 are aligned in the same direction of pulling, for example, they are arranged horizontally. At this time, the strip 9 can pass through the surface of the guide plate and then wrap around the corresponding tension roller 1, thereby realizing the threading guidance. The horizontal projection area of ​​the guide plate is larger than the horizontal projection area of ​​the roller frame 2 to ensure sufficient guiding length. When the tension roller 1 is in the working position, the rotating connecting rod 112 rotates and controls the guide plate 1132 to retract into the main body 1131 through the slide, and the guide plate 113 moves away from the tension roller 1, so as not to interfere with the operation of the tension roller 1.

[0038] The guide plate component 113 also includes a second telescopic component 1133, which is connected between the main plate body 1131 and the sub-guide plate 1132, and is used for the extension and retraction of the sub-guide plate 1132 relative to the main plate body 1131. When the tension roller 1 is in the belt threading position, the sub-guide plate 1132 extends relative to the main plate body 1131 (e.g., Figure 5 and Figure 6 (As shown); when in the working position, the guide plate 1132 retracts into the main plate 1131 via the slide rail (as shown). Figure 4 (As shown).

[0039] like Figure 5 and Figure 6 As shown, the second telescopic member 1133 can be a hydraulic telescopic rod or a screw assembly (which can be threadedly connected to the guide plate 1132 through the screw. Since the guide plate 1132 is slidably connected to the main body 1131, rotating the screw can drive the guide plate 1132 to extend or retract relative to the main body 1131).

[0040] By setting the main body 1131 and the guide plate 1132, the guide length is extended, so that the guide plate 113 can extend into the inclined roller frame 2 while the frame 3 maintains its original height, thereby completing the guidance.

[0041] like Figure 5 and Figure 6 As shown, in some scenarios, guide plate 113 is also provided with guide limiting edges on both sides, and the width between the guide limiting edges is the common width of strip 9, which further improves the guiding and directing effect.

[0042] like Figure 1 and Figure 2 As shown, in an optional embodiment of the present invention, the guide belt assembly 11 further includes a first telescopic member 111, one end of which is hinged to the frame 3 and the other end is hinged to the rotating connecting rod 112.

[0043] Specifically, when the rotating link 112 is driven by the first telescopic member 111, for example, by the second hydraulic cylinder, the stability of the drive can be improved. When the tension roller 1 is in the working position, the first telescopic member 111 drives the rotating link 112, thereby causing the corresponding guide plate 113 to be in a state away from the tension roller 1, which will not interfere with the operation of the tension roller 1; for example Figure 5 As shown, when the tension roller 1 is in the threading position, the first telescopic member 111 drives the two rotating connecting rods 112 to rotate 90 degrees, so that the main body 1131 and the guide plate 1132 are joined to form a horizontally arranged guide plate, which facilitates the threading of the belt 9 and maintains the stability of the guide plate 113.

[0044] like Figure 3 As shown, in an optional embodiment of the present invention, the belt threading tension roller device further includes a locking component 7, which is used to lock the roller frame 2 when the tension roller 1 is in the belt threading position and / or working position.

[0045] Specifically, the locking assembly 7 is installed on the frame 3. The locking assembly 7 can be a hydraulic cylinder, etc. When the tension roller 1 is rotated to the working position by the roller frame 2, the second hydraulic cylinder of the locking assembly 7 drives the locking pin to insert into the pin hole of the roller frame 2, keeping the tension roller 1 locked in the working position. The locking assembly 7 is opened in advance when the tension roller 1 rotates. Similarly, the belt threading position can also be locked by the locking assembly. Different hydraulic cylinders and corresponding pin holes can be used, or the same hydraulic cylinder can be used to correspond to different pin holes. Both can meet the stability of the roller frame 2 under different states, thereby maintaining the stability of the tension roller 1.

[0046] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

[0047] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A belt threading tension roller device, characterized in that, The system includes a tension roller (1), a roller frame (2), a frame (3), a rotary drive assembly (8), and a guide belt assembly (11). The tension roller (1) is mounted on the frame (3) via the roller frame (2). The tension roller (1) is configured to rotate relative to the roller frame (2) about its own axis. The roller frame (2) is rotatably mounted on the frame (3) and driven by the rotary drive assembly (8) to switch the tension roller (1) between the threading position and the working position. The guide belt assembly (11) cooperates with the tension roller (1) and is used to guide the strip (9) threaded onto the tension roller (1) when the tension roller (1) is in the threading position.

2. The belt threading tension roller device according to claim 1, characterized in that, The tension roller (1) is provided in at least two sets, and the two sets of tension roller (1) are symmetrically arranged on the roller frame (2) along the belt threading direction of the belt (9).

3. The belt threading tension roller device according to claim 2, characterized in that, The tension roller (1) includes a drive motor (4) and a tension roller body (5). The tension roller body (5) is disposed on the roller frame (2) and configured to rotate relative to the roller frame (2) about its own axis. The drive motor (4) is used to drive the tension roller body (5) to rotate.

4. The belt threading tension roller device according to claim 3, characterized in that, The drive motor (4) is an external rotor motor and is built into the tension roller body (5). The stator of the external rotor motor is located at the axial center of the tension roller body (5) and is connected to the roller frame (2). The tension roller body (5) is connected to the rotor of the external rotor motor.

5. The belt threading tension roller device according to any one of claims 1-4, characterized in that, The roller frame (2) includes a frame (13) and a rotating shaft (10) located at the center of both sides of the frame (13). The tension roller (1) is located on the frame (13). The frame (13) is rotatably connected to the machine frame (3) through the rotating shaft (10). The rotation drive assembly (8) is used to drive the rotating shaft (10) to rotate so that the tension roller (1) switches between the belt threading position and the working position.

6. The belt threading tension roller device according to claim 5, characterized in that, It also includes an energy supply component (6), which supplies electrical energy and / or cooling medium to the tension roller (1) via the rotating shaft.

7. The belt threading tension roller device according to any one of claims 1-4, characterized in that, When the tension roller (1) is in the belt threading position, the roller frame (2) is in an inclined state; when the tension roller (1) is in the working position, the roller frame (2) is in a horizontal state. The guide belt assembly (11) is provided in two sets, and the two sets of guide belt assemblies (11) are symmetrically arranged along the central axis of the frame (3). The guide belt assembly (11) includes a rotating connecting rod (112) and a guide plate (113). One end of the rotating connecting rod (112) is rotatably connected to the frame (3) and is configured to be relatively rotatable. The frame (3) rotates, and the other end of the rotating link (112) is fixedly connected to the guide plate (113) so that when the tension roller (1) is in the belt threading position, the opposite ends of the guide plates (113) of the two sets of belt guide assemblies (11) pass through the roller frame (2) in the inclined state and form a guide plate for guiding the belt (9). When the tension roller (1) is in the working position, the guide plates (113) of the two sets of belt guide assemblies (11) separate and move away from the roller frame (2).

8. The belt threading tension roller device according to claim 7, characterized in that, The guide plate component (113) includes a main body (1131) and a sub-guide plate (1132). The main body (1131) is fixedly connected to the other end of the rotating connecting rod (112) of the corresponding guide belt assembly (11). The sub-guide plate (1132) is configured to be telescopically connected to the main body (1131). The main body (1131) is provided with a slide that is adapted to the sub-guide plate (1132). When the tension roller (1) is in the belt threading position, the guide plate component (113) is close to the roller frame (2), and the sub-guide plate (1132) extends out of the slide. When the tension roller (1) is in the working position, the guide plate component (113) is away from the roller frame (2), and the sub-guide plate (1132) retracts into the main body (1131) through the slide.

9. The belt threading tension roller device according to claim 7, characterized in that, The guide belt assembly (11) also includes a first telescopic member (111), one end of which is hinged to the frame (3) and the other end is hinged to the rotating connecting rod (112).

10. The belt threading tension roller device according to any one of claims 1-4, characterized in that, It also includes a locking assembly (7) for locking the roller frame (2) when the tension roller (1) is in the threading position and / or working position.

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