Belt leveling device

Abstract

A belt leveling device. The belt leveling device comprises: a frame; a first leveling wheel rotatably mounted on the frame, the first leveling wheel being a rotating body having a convex arc-shaped surface; and a second leveling wheel rotatably mounted on the frame, the second leveling wheel being a rotating body having a concave arc-shaped surface, wherein the first leveling wheel is arranged above the second leveling wheel, a gap is formed between the first leveling wheel and the second leveling wheel, and the gap is designed for a flanged belt to be leveled to pass through under the action of a driving force, so that said belt is reversely bent to achieve leveling.

Description

Belt leveling device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 16, 2024, with application number 202410064332X and invention name “A Belt Leveling Device”, the contents of which should be understood as incorporated into this application by reference. Technical Field

[0002] The present invention relates to but is not limited to the field of gypsum board production technology, and in particular to but is not limited to a belt leveling device. Background Art

[0003] During the gypsum board molding process, the edges of the gypsum board must be chamfered, resulting in a smooth, wedge-shaped edge. The belt plays a key role in shaping the wedge-shaped edge of the gypsum board, so its smoothness is highly critical. After prolonged use, the belt, due to tension and aging, can curl, leading to unstable molding quality of the wedge-shaped edge, impacting the belt's service life and the quality of the gypsum board produced.

[0004] Summary of the Invention

[0005] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0006] A belt leveling device, comprising:

[0007] Bracket;

[0008] a first leveling wheel rotatably mounted on the bracket, wherein the first leveling wheel is a rotating body having a convex arc surface;

[0009] a second leveling wheel rotatably mounted on the bracket, wherein the second leveling wheel is a rotating body having a concave arc surface;

[0010] Wherein, the first leveling wheel is arranged above the second leveling wheel and forms a gap between the first leveling wheel and the second leveling wheel. The gap is configured to allow the curled belt to be leveled to pass through under the action of driving force, so that the belt to be leveled is bent in the opposite direction to achieve leveling.

[0011] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description.

[0012] Summary of the Figures

[0013] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0014] FIG1 is a front view schematic diagram of the structure of a belt leveling device according to an embodiment of the present application;

[0015] FIG2 is a side structural schematic diagram of the belt leveling device of FIG1 ;

[0016] FIG3 is a schematic diagram of the installation of the belt leveling device and the large belt and small belt of FIG1;

[0017] FIG4 is an AA cross-sectional view of the small belt in FIG3 before entering the belt leveling device;

[0018] FIG5 is a BB cross-sectional view of the small belt in FIG3 after entering the belt leveling device.

[0019] Reference numerals:

[0020] 100-belt leveling device,

[0021] 1-first leveling wheel, 101-convex arc surface, 2-second leveling wheel, 201-concave arc surface, 202-flange, 3-gap, 4-belt, 5-bracket, 51-vertical plate, 511, 512-mounting groove, 5111, 5121-entry section, 5112, 5122-limiting section, 513-outer wall surface, 514-inner wall surface, 6-first shaft, 61-flat section, 62-step, 63-protrusion, 7-second shaft, 8-clamping structure, 81-adjusting screw, 82-first nut, 83-spring, 9-first bearing, 10-second bearing, 11-second nut, 12-large belt, 13-roller.

[0022] Details

[0023] This application describes multiple embodiments, but this description is exemplary rather than restrictive, and it will be apparent to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described herein. Although many possible feature combinations are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0024] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive solution. Any features or elements of any embodiment may also be combined with features or elements from other inventive solutions to form another unique inventive solution. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the appended claims and their equivalents, the embodiments are not subject to other limitations. In addition, various modifications and changes may be made within the scope of protection of the appended claims.

[0025] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps in the specific order described. As will be understood by those skilled in the art, other orders of steps are also possible. Therefore, the specific order of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to performing their steps in the order written, and those skilled in the art can readily understand that these orders can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0026] The embodiment of the present application provides a belt leveling device 100, as shown in Figures 1 to 5, comprising: a bracket 5; a first leveling wheel 1, rotatably mounted on the bracket 5, the first leveling wheel 1 being a rotating body having a convex arc-shaped surface 101; and a second leveling wheel 2, rotatably mounted on the bracket 5, the second leveling wheel 2 being a rotating body having a concave arc-shaped surface 201. The first leveling wheel 1 is disposed above the second leveling wheel 2, with a gap 3 formed between the first leveling wheel 1 and the second leveling wheel 2. The gap 3 is configured to allow a belt 4 with a curled edge to be leveled to pass through under the action of a driving force, thereby causing the belt 4 to be leveled to bend in the opposite direction to achieve leveling.

[0027] As shown in Figure 1, a belt 4 is positioned between a first leveling wheel 1 and a second leveling wheel 2. The second leveling wheel 2 supports the belt 4 and cooperates with the first leveling wheel 1 and the second leveling wheel 2 to compress the belt 4, thereby deforming it. Both the first leveling wheel 1 and the second leveling wheel 2 are rotating bodies, each with a convex curved surface 101 and a concave curved surface 201, respectively. When the belt 4 passes between the first leveling wheel 1 and the second leveling wheel 2 under the action of a driving force, it drives the first leveling wheel 1 and the second leveling wheel 2 to rotate about their respective central axes L1 and L2. A gap 3 is formed between the convex curved surface 101 of the first leveling wheel 1 and the concave curved surface 201 of the second leveling wheel 2 to accommodate the belt 4. The cross-section of this gap 3 is a curved shape with high ends and low center. This is the opposite of the original cross-sectional curvature of the belt 4 before entering the belt leveling device 100 (e.g., low ends and high center). This creates a reverse curvature of the belt 4, flattening it and extending its service life.

[0028] As shown in Figures 3 to 5, during gypsum board production, the gypsum board is placed on a large belt 12 (the upper portion of the large belt in Figure 3), which is used to shape the gypsum board. Two sets of small belts (i.e., belts 4) are located on either side of the large belt 12, forming the wedge-shaped edges on both sides of the gypsum board. The large belt 12 and the two sets of small belts 4 can be mounted on rollers 13, which drive the large belt 12 and the small belts 4. A belt leveling device 100 is located in the non-operating portion of each set of small belts 4 (the lower portion of the small belt in Figure 3) to level any deformed small belts 4 during the gypsum board production process. The cross-sectional shape of the small belts 4 before leveling, i.e., before entering the belt leveling device 100, is shown in Figure 4: it is convex with a high center and low ends. The cross-sectional shape of the small belts 4 after exiting the belt leveling device 100 is shown in Figure 5: it is concave with a low center and high ends. This shows that the belt leveling device 100 bends the small belts 4 in the opposite direction, thereby leveling them. The belt leveling device 100 utilizes the original driving force of the small belt 4 during the production process to move the small belt 4 through the belt leveling device 100, thereby promptly leveling the small belt 4 during the production of the gypsum board. This advantageously ensures the quality of the wedge-shaped edges of the gypsum board and extends the service life of the small belt 4. In Figure 3, due to the long size of the small belt 4, multiple belt leveling devices 100 are installed at intervals along the small belt 4 to ensure the leveling effect of the small belt 4.

[0029] The belt leveling device 100 of the embodiment of the present application has a simple structure and can be easily installed on the small belt 4. The small belt 4 can be leveled in time during the production of the gypsum board, thereby ensuring the molding quality of the wedge-shaped edge of the gypsum board and extending the service life of the small belt 4.

[0030] In one exemplary embodiment, as shown in Figure 1, the convex curved surface 101 of the first leveling wheel 1 matches the concave curved surface 201 of the second leveling wheel 2, forming a gap 3 of uniform thickness between the first and second leveling wheels 1 and 2. The upper and lower sides of the belt 4 are in close contact with the convex curved surface 101 and concave curved surface 201 of the first and second leveling wheels 1 and 2, respectively, deforming the cross-section of the belt 4 into a shape that matches the convex curved surface 101 and concave curved surface 201 of the first and second leveling wheels 1 and 2. Specifically, the cross-section of the belt 4 is deformed into a concave arc shape with a low center and high ends. The belt 4 is in full contact with the first and second leveling wheels 1 and 2, resulting in a large contact area and a better leveling effect.

[0031] In an exemplary embodiment, as shown in FIG1 , the first leveling wheel 1 is a convex elliptical wheel with a thick center and tapered ends. The rotating surface of the first leveling wheel 1 is a portion of a convex elliptical surface, and the rotating surface of the second leveling wheel 2 is a concave elliptical surface consistent with the convex elliptical surface of the first leveling wheel 1, thereby deforming the cross-section of the belt 4 into a portion of an elliptical shape. The first leveling wheel 1 and the second leveling wheel 2 are both bilaterally symmetrical, facilitating the bilaterally symmetrical deformation of the belt 4 to be leveled. The left and right ends of the second leveling wheel 2 extend radially away from the central axis L2 of the second leveling wheel 2, respectively, thereby forming radially protruding flanges 202 on the left and right ends of the second leveling wheel 2, respectively, so that the second leveling wheel 2 is formed by rotating in a U-shaped shape. The two flanges 202 on the left and right ends of the second leveling wheel 2 prevent the belt 4 from detaching from the left and right ends of the first and second leveling wheels 1 and 2.

[0032] In an exemplary embodiment, as shown in Figures 1 and 2, the first screed wheel 1 is mounted on the bracket 5 via a first shaft 6, and the second screed wheel 2 is mounted on the bracket 5 via a second shaft 7. The first shaft 6 and the second shaft 7 are constrained on the bracket 5. The first screed wheel 1 is rotatably sleeved on the first shaft 6, and the second screed wheel 2 is rotatably sleeved on the second shaft 7. The first shaft 6 is located above the second shaft 7. The first screed wheel 1 is rotatably connected to the first shaft 6 via a first bearing 9, and the second screed wheel 2 is rotatably connected to the second shaft 7 via a second bearing 10. The bracket 5 is used to support or limit the first shaft 6 and the second shaft 7.

[0033] As shown in Figures 1 and 2, the belt leveling device 100 further includes a pressing structure 8, which abuts against the first shaft 6 to limit the upward movement of the first shaft 6. During the leveling process of the belt 4, the first leveling wheel 1 applies pressure to the belt 4 to deform the belt 4. At the same time, the belt 4 applies a reaction force to the first leveling wheel 1. This reaction force may cause the first leveling wheel 1 and the first shaft 6 to jump upward. Therefore, it is necessary to apply a pressing force to the first shaft 6 to ensure that the vertical position of the first leveling wheel 1 is substantially fixed, limit the upward movement of the first leveling wheel 1 and the first shaft 6, and ensure that the first leveling wheel 1 applies appropriate pressure to the belt 4, thereby ensuring the leveling effect of the belt 4.

[0034] In an exemplary embodiment, as shown in Figures 1 and 2, the clamping structure 8 includes a movable member and an elastic member, the upper end of the elastic member is fixed to the movable member, and the movable member is configured to be able to move in the vertical direction to drive the elastic member to undergo elastic deformation; the lower end of the elastic member abuts against the first shaft 6 to limit the upward jump of the first shaft 6. For belts 4 with different degrees of deformation or different thicknesses, the pressure required to level the belt 4 is also different, so the clamping structure 8 needs to be adjustable to adjust the clamping force on the first shaft 6 according to the specific situation of the belt 4, and then adjust the pressure applied to the belt 4 by the first leveling wheel 1. The clamping structure 8 can be provided with multiple groups, which can be symmetrically arranged at the left and right ends of the first shaft 6. The movement of the movable member causes the elastic member fixedly connected to the movable member to undergo different degrees of elastic deformation, which in turn causes the clamping force applied to the first shaft 6 by the elastic member to change, thereby adjusting the pressure applied to the belt 4 by the first leveling wheel 1.

[0035] In an exemplary embodiment, as shown in Figures 1 and 2, the compression structure 8 further includes a first nut 82 fixedly connected to the bracket 5, a movable member being an adjustment screw 81 that is screwed into the nut in the vertical direction (i.e., the vertical direction in Figure 1), and an elastic member being a spring 83, the upper end of which is sleeved on the adjustment screw 81 and tightly fitted therewith. The first nut 82 can be fixed (e.g., welded) to the outer wall surface 513 of the bracket 5. The upper end of the spring 83 is sleeved on the lower portion of the adjustment screw 81 located below the first nut 82 and tightly fitted therewith, thereby fixing the upper end of the spring 83 to the lower portion of the adjustment screw 81. The portion of the first shaft 6 that contacts the spring 83 is fixedly provided with a protrusion 63 (as shown in Figure 2), and the lower end of the spring 83 is sleeved on the protrusion 63 to prevent the lower end of the spring 83 from slipping. Twisting the adjustment screw 81 causes the adjustment screw 81 to move vertically within the first nut 82. Movement of the adjusting screw 81 can change the elastic deformation of the spring 83, thereby changing the pressing force applied by the spring 83 on the first shaft 6, and further changing the pressure applied by the first leveling wheel 1 to the belt 4. Figure 1 shows two sets of pressing structures 8, located on the left and right sides of the bracket 5 respectively.

[0036] In an exemplary embodiment, as shown in Figures 1 and 2, the bracket 5 includes two vertical plates 51 spaced apart from each other in the transverse direction (i.e., the left-right direction in Figure 1). Each vertical plate 51 is provided with two mounting slots 511 and 512 spaced apart from each other in an upper and lower direction. The first shaft 6 is inserted through the two mounting slots 511 located on the upper side, and the second shaft 7 is inserted through the two mounting slots 512 located on the lower side. The left and right ends of the first shaft 6 are respectively inserted through the two mounting slots 511 located on the upper side of the two vertical plates 51, and the left and right ends of the second shaft 7 are respectively inserted through the two mounting slots 512 located on the lower side of the two vertical plates 51. The first shaft 6 and the second shaft 7 are respectively mounted to the bracket 5 via the mounting slots 511 and 512 and are placed in appropriate positions within the mounting slots 511 and 512. The mounting slots 511 and 512 facilitate the installation of the first shaft 6 and the second shaft 7, and support or limit the first shaft 6 and the second shaft 7.

[0037] In an exemplary embodiment, as shown in Figure 2, the mounting grooves 511 and 512 respectively include entry sections 5111 and 5121 and limiting sections 5112 and 5122 respectively located at the lower sides of the entry sections 5111 and 5121, the entry section 5111 is connected to the limiting section 5112 by a turning point, and the entry section 5121 is connected to the limiting section 5122 by a turning point; one end of the entry sections 5111 and 5121 is open, and the other end of the entry sections 5111 and 5121 is connected to the limiting sections 5112 and 5122 respectively and located above the limiting sections 5112 and 5122.

[0038] The first shaft 6 is configured to enter the limiting section 5112 through the entry section 5111 of the two installation grooves 511 located on the upper side, and be limited in the limiting section 5112; the second shaft 7 is configured to enter the limiting section 5122 through the entry section 5121 of the two installation grooves 512 located on the lower side, and be limited in the limiting section 5122.

[0039] The ends of the first shaft 6 and the second shaft 7 respectively enter their respective limiting sections 5112 and 5122 from the upper and lower entry sections 5111 and 5121 and remain within their respective limiting sections 5112 and 5122. The entry sections 5111 and 5121 are open at one end, making it easy to install the first shaft 6 and the second shaft 7 on the bracket 5. Because the limiting sections 5112 and 5122 extend a certain distance in the vertical direction, the first shaft 6 and the second shaft 7 are located a certain distance from the corresponding entry sections 5111 and 5121 in the vertical direction, and will not detach from the bracket 5 through the corresponding entry sections 5111 and 5121 along the corresponding limiting sections 5112 and 5122. The entry sections 5111 and 5121 can be horizontal sections, and the limiting sections 5112 and 5122 can be vertical sections. Of course, the entry sections 5111 and 5121 and the limiting sections 5112 and 5122 may not be horizontal and vertical, but may be set to be inclined at a certain angle relative to the horizontal direction and the vertical direction respectively.

[0040] As shown in Figure 2, the end of the second shaft 7 is supported on the bottom surface of the lower limiting section 5122, while the end of the first shaft 6 is spaced apart from the bottom surface of the upper limiting section 5112 due to the first leveling wheel 1 pressing against the belt 4. The end of the first shaft 6 can be positioned at different vertical positions within the upper limiting section 5112 by adjusting the pressing structure 8 to accommodate belts 4 of varying thicknesses. Therefore, the belt leveling device 100 is suitable for belts 4 of varying thicknesses.

[0041] In an exemplary embodiment, as shown in FIG2 , flat sections 61 are provided at both ends of the first shaft 6. The flat sections 61 cooperate with the side walls of the limiting section 5112 of the mounting groove 511 located on the upper side to limit the rotation of the first shaft 6 relative to the bracket 5. Flat sections 61 are provided on both sides of the end of the first shaft 6 so that the first shaft 6 can move up and down along the side walls of the limiting section 5112 of the mounting groove 511 located on the upper side, but cannot rotate. When the moving part of the clamping structure 8 moves vertically to adjust the clamping force of the clamping structure 8 on the first shaft 6, the first shaft 6 will not rotate, so that the clamping structure 8 can be stably pressed on the first shaft 6, facilitating the adjustment of the clamping structure 8.

[0042] In an exemplary embodiment, as shown in FIG1 , the first shaft 6 is provided with a step 62 located between the two risers 51 and adjacent to the inner wall 514 of each riser 51 to limit lateral movement of the first shaft 6. The first shaft 6 is provided with two steps 62 at its connection to the two risers 51, each facing the inner wall 514 of each riser 51. When the first shaft 6 is likely to move laterally, the inner wall 514 of the two risers 51 blocks the two steps 62, thereby preventing lateral displacement of the first shaft 6. This maintains the lateral position of the first shaft 6 and, consequently, the lateral position of the first screed wheel 1. During installation, the limiting effect of the steps 62 facilitates positioning the first screed wheel 1 in the appropriate lateral direction.

[0043] In an exemplary embodiment, the outer surface of the second shaft 7 is threaded, located outside the two vertical plates 51. Second nuts 11 are mounted on the threads, abutting against the outer walls 513 of the vertical plates 51 to limit lateral movement of the second shaft 7. The second shaft 7 can be threaded along its entire length, or it can be threaded only at its ends, located outside the outer walls 513 of the vertical plates 51. The two second nuts 11 abut against the outer walls 513 of the vertical plates 51, respectively, on the outside of the two vertical plates 51, securing the second shaft 7 in place and preventing lateral movement. They also position the second screed wheel 2 in a suitable lateral position.

[0044] In an exemplary embodiment, both the first and second leveling wheels 1 and 2 are nylon or rubber wheels. Nylon or rubber wheels are lightweight, reducing damage to the belt 4 and offering excellent wear resistance and shock absorption. Furthermore, the first and second leveling wheels 1 and 2 can also be made of a lightweight metal, such as an aluminum alloy.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features being referred to. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include at least one of the features.

[0047] In the description of the present application, “a plurality of” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, "connected" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0051] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A belt leveling device, comprising: Bracket; a first leveling wheel rotatably mounted on the bracket, wherein the first leveling wheel is a rotating body having a convex arc surface; a second leveling wheel rotatably mounted on the bracket, wherein the second leveling wheel is a rotating body having a concave arc surface; Wherein, the first leveling wheel is arranged above the second leveling wheel and forms a gap between the first leveling wheel and the second leveling wheel, and the gap is configured to allow the curled belt to be leveled to pass through under the action of driving force, so that the curled belt to be leveled is reversely bent to achieve leveling.

2. The belt flattening device according to claim 1, wherein, The shape of the convex arc surface of the first leveling wheel is consistent with the shape of the concave arc surface of the second leveling wheel, so that a gap with a consistent thickness is formed between the first leveling wheel and the second leveling wheel.

3. The belt flattening device according to claim 2, wherein, The first leveling wheel is a convex elliptical wheel that is thick in the middle and thin at both ends.

4. The belt flattening device according to any one of claims 1 to 3, wherein, The first leveling wheel is installed on the bracket through a first shaft, and the second leveling wheel is installed on the bracket through a second shaft. The first shaft and the second shaft are limited to the bracket, and the first leveling wheel is rotatably sleeved on the first shaft, and the second leveling wheel is rotatably sleeved on the second shaft. The belt leveling device further includes a clamping structure, which abuts against the first shaft to limit the upward movement of the first shaft.

5. The belt flattening device according to claim 4, wherein, The clamping mechanism includes a moving part and an elastic part. The upper end of the elastic part is fixed to the moving part. The moving part is configured to be movable in the vertical direction to drive the elastic part to undergo elastic deformation. The lower end of the elastic part abuts against the first shaft to limit the upward movement of the first shaft.

6. The belt leveling device according to claim 5, wherein, The clamping mechanism also includes a first nut fixedly connected to the bracket, the movable member is an adjusting screw screwed into the first nut in the vertical direction, the elastic member is a spring, and the upper end of the spring is sleeved on the adjusting screw and tightly matched with the adjusting screw.

7. The belt flattening device according to claim 4, wherein, The bracket includes two vertical plates that are relatively spaced apart, each of the vertical plates is provided with two installation slots spaced apart up and down, the first axis passes through the two installation slots located on the upper side, and the second axis passes through the two installation slots located on the lower side.

8. The belt flattening device according to claim 7, wherein, The installation groove includes an entry section connected by a turning point and a limit section located below the entry section; one end of the entry section is open, and the other end of the entry section is connected to the limit section and located above the limit section; The first axis is configured to enter the limit section through the entry sections of the two installation grooves located on the upper side and be limited in the limit section; the second axis is configured to enter the limit section through the entry sections of the two installation grooves located on the lower side and be limited in the limit section.

9. The belt flattening device according to claim 8, wherein, Flat sections are provided at both ends of the first shaft, and the flat sections cooperate with the side walls of the limiting sections of the two mounting grooves located on the upper side to limit the first shaft from rotating relative to the bracket.

10. The belt flattening device according to claim 7, wherein, The outer surface of the second shaft is provided with threads, the threads are located outside the two vertical plates, second nuts are respectively installed on the threads, and the second nuts abut against the outer wall surfaces of the vertical plates to limit the lateral movement of the second shaft.

11. The belt flattening device according to claim 7, wherein, The first shaft is provided with a step, and the step is arranged between the two vertical plates and adjacent to the inner wall surface of the vertical plates to limit the lateral movement of the first shaft.

12. The belt leveling device according to any one of claims 1 to 3, wherein, Both the first leveling wheel and the second leveling wheel are nylon wheels or both are rubber wheels.

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