Adjustable tensioning roller and automatic deviation adjusting method

Abstract

The invention relates to the technical field of conveying equipment, and particularly discloses an adjustable tensioning roller and an automatic deviation adjusting method.The adjustable tensioning roller comprises a fixing frame, a tensioning assembly and an adjusting assembly, the fixing frame is provided with two sliding grooves in a spaced mode in the first direction, and the sliding grooves are concavely formed in the second direction; the tensioning assembly comprises a tensioning roller and a tensioning shaft, the tensioning roller is arranged on the tensioning shaft in a penetrating mode, the two ends of the tensioning shaft are arranged in the two sliding grooves respectively, and the two ends of the tensioning shaft slide in the two sliding grooves respectively; the adjusting assembly can independently adjust the positions of the two ends of the tensioning shaft in the corresponding sliding grooves so that any end of the tensioning shaft can slide and be fixed relative to the fixing frame in the second direction in the corresponding sliding groove. The first direction is perpendicular to the second direction. The positions of the two ends of the tensioning shaft in the two sliding grooves are independently adjusted through the adjusting assemblies, so that the tensioning shaft deflects, and the pressure of the whole conveying belt on the tensioning roller gradually tends to be consistent. The deviation phenomenon of the conveying belt is actively intervened and corrected.

Description

Adjustable tension roller and automatic deviation adjustment method Technical Field

[0001] This invention relates to the field of conveying equipment technology, and in particular to adjustable tension rollers and an automatic method for adjusting misalignment. Background Technology

[0002] In tobacco warehousing and sorting, the cigarette conveying mechanism is one of the key pieces of equipment to ensure smooth production. This mechanism typically relies on a belt drive system to rotate the rollers, thereby achieving continuous and efficient conveying of cigarettes. As the core component of this drive system, the stability of the belt's operation directly affects the efficiency and reliability of the entire conveying system.

[0003] However, in practical applications, due to various factors such as manufacturing tolerances of the belt itself, asymmetry of the joints, uneven wear of the rollers, and uneven load distribution, the belt is prone to lateral swaying, also known as "belt misalignment." This phenomenon not only accelerates the wear of the belt edges but can also, in severe cases, cause the belt to completely detach from the roller system, leading to production line shutdown and economic losses for the company.

[0004] Most belt tensioning mechanisms currently on the market use a single-screw tensioning method. While this method can solve the problem of belt slack caused by natural belt elongation, its tensioning direction is usually fixed (e.g., vertical or horizontal). This means it is limited to adjusting the overall belt tension and cannot effectively address belt misalignment. In other words, existing technology mainly focuses on providing sufficient tension to maintain the belt's normal operating condition, while it falls short in actively intervening to correct existing misalignment.

[0005] Therefore, there is an urgent need for adjustable tension rollers and automatic deviation adjustment methods to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an adjustable tension roller and an automatic belt misalignment adjustment method to solve the problem that the existing technology mainly focuses on providing sufficient tension to maintain the normal operation of the belt, but is inadequate in actively intervening and correcting the misalignment that has already occurred.

[0007] On one hand, the present invention provides an adjustable tension roller, which includes: a fixed frame, wherein the fixed frame is provided with two sliding grooves spaced apart along a first direction, and the sliding grooves are recessed along a second direction; a tensioning assembly, including a tension roller and a tensioning shaft, wherein the tension roller passes through the tensioning shaft and is rotatable on the tensioning shaft, and both ends of the tensioning shaft are respectively disposed in the two sliding grooves, and both ends of the tensioning shaft are slidable in the two sliding grooves respectively; an adjustment assembly, which is capable of independently adjusting the positions of both ends of the tensioning shaft in the corresponding sliding grooves, so that either end of the tensioning shaft in the corresponding sliding groove includes a sliding state relative to the fixed frame along the second direction and a fixed state relative to the fixed frame; the first direction and the second direction are perpendicular.

[0008] As a preferred technical solution for the adjustable tension roller, the adjusting assembly includes: two lead screws, each of which is respectively disposed in one of the two slide grooves. One end of each lead screw is connected to the bottom wall of the corresponding slide groove along the second direction, and the lead screw can swing relative to the bottom wall of the groove and rotate around its axis. The other end of each lead screw points towards the opening of the slide groove along the second direction. Two nuts are respectively disposed at both ends of the tension shaft. The nuts can swing relative to the tension shaft and slide along its axial direction. The two nuts are screwed one-to-one with the two lead screws.

[0009] As a preferred technical solution for adjustable tension rollers, one end of the lead screw is provided with a ball head, and the bottom wall of the groove is recessed with a ball socket, with the ball head disposed in the corresponding ball socket.

[0010] As a preferred technical solution for the adjustable tension roller, the tension shaft has a first oblong hole at each end, the length of the first oblong hole extending along the axis of the tension shaft; the nut includes a nut body and a connector, the nut bodies of the two nuts are inserted into the two first oblong holes one by one, the connector allows the corresponding nut body to swing within the first oblong hole, and the connector also allows the corresponding nut body to slide within the first oblong hole along the axis of the tension shaft.

[0011] As a preferred technical solution for the adjustable tension roller, the tensioning shaft has two coaxial second waist-shaped holes corresponding to the first waist-shaped hole at both ends. The axes of the first waist-shaped hole and the two corresponding second waist-shaped holes are perpendicular and interconnected. The length direction of the second waist-shaped hole extends along the axis of the tensioning shaft. The connecting member includes two sliding pins that protrude radially from the nut body. The two sliding pins on the nut body are respectively inserted into the two second waist-shaped holes opposite to the nut body. The length of the sliding pin inserted into the corresponding second waist-shaped hole is greater than the length of the second waist-shaped hole along the axial direction of the tensioning shaft.

[0012] As a preferred technical solution for the adjustable tension roller, the peripheral wall of the nut body is provided with two coaxial recesses along the radial direction of the nut body, and the two sliding pins are inserted into the two recesses one by one and connected to the nut body.

[0013] As a preferred technical solution for the adjustable tension roller, it also includes a drive assembly, which includes a first driver, a first coupling, a second driver, and a second coupling. The first driver is connected to the other end of one of the lead screws via the first coupling, and the second driver is connected to the other end of the other lead screw via the second coupling.

[0014] As a preferred technical solution for the adjustable tension roller, the drive assembly further includes two pressure sensors, which are configured to be disposed on both sides of the conveyor belt along the first direction. The two pressure sensors respectively monitor the pressure exerted by the conveyor belt on the two pressure sensors along the first direction. The drive assembly also includes a controller, which controls the working state of the first driver and the second driver according to the signals monitored by the two pressure sensors.

[0015] As a preferred technical solution for the adjustable tension roller, it also includes a connecting frame, which is connected to the fixed frame. The connecting frame is provided with a plurality of fixing holes. The axis of the fixing holes is perpendicular to the plane containing the first direction and the second direction. The diameter of the fixing holes is larger than the stud diameter of the fixing bolt and smaller than the screw head diameter of the fixing bolt. The fixing bolt passes through the corresponding fixing hole and is screwed to the frame.

[0016] On the other hand, the present invention provides an automatic deviation adjustment method, which is adjusted by an adjustable tension roller in any of the above schemes. The automatic deviation adjustment method includes: two pressure sensors respectively monitoring the acting pressure F1 and F2 of the conveyor belt along the first direction on the two pressure sensors; if F1 is within a preset range a and F2 is within the preset range a, then the adjustable tension roller does not move; if F1 is outside the preset range a or F2 is outside the preset range a, then the adjustable tension roller is adjusted until F1 is within the preset range a and F2 is within the preset range a.

[0017] The adjustable tension roller and automatic deviation adjustment method provided by the above solution have at least the following beneficial effects: The adjustable tension roller includes a fixed frame, a tensioning component, and an adjusting component. The fixed frame has two grooves spaced apart along a first direction, and the grooves are recessed along a second direction. The tensioning component includes a tension roller and a tensioning shaft. The tension roller passes through the tensioning shaft and can rotate on the tensioning shaft. The two ends of the tensioning shaft are respectively located in the two grooves, and the two ends of the tensioning shaft can slide in the two grooves respectively. The adjusting component can independently adjust the positions of the two ends of the tensioning shaft in the corresponding grooves, so that either end of the tensioning shaft in the corresponding groove includes a sliding state relative to the fixed frame along the second direction and a fixed state relative to the fixed frame; the first direction and the second direction are perpendicular. The fixed frame of the adjustable tension roller is fixed to the cigarette conveying mechanism. The conveyor belt is sleeved on the tension roller, and the drive wheel drives the conveyor belt to rotate, thereby realizing the rotation of the conveyor belt on the tension roller. By adjusting the positions of the two ends of the tensioning shaft in the two grooves synchronously by the adjusting component, the overall tension of the conveyor belt is adjusted. When the conveyor belt deviates from its designated path, the pressure on one side of the conveyor belt on the tension roller is less than the pressure on the other side along the axial direction of the tension shaft. To address this, the positions of both ends of the tension shaft within the two grooves are individually adjusted using an adjusting assembly, causing the tension shaft to tilt and gradually equalize the pressure of the entire conveyor belt on the tension roller. This proactively intervenes and corrects the already occurring conveyor belt deviation. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the adjustable tension roller in an embodiment of the present invention; Figure 2 is a cross-sectional view at point AA in Figure 1; Figure 3 is a schematic diagram of the adjustable tension roller in an embodiment of the present invention; Figure 4 is an exploded view of the adjustable tension roller in an embodiment of the present invention; Figure 5 is a schematic diagram of the tension shaft in an embodiment of the present invention; Figure 6 is a flowchart of the automatic deviation adjustment method in an embodiment of the present invention.

[0019] In the diagram: X, first direction; Y, second direction; 100, conveyor belt; 1, fixed frame; 11, base plate; 12, side plate; 121, chute; 122, ball socket; 13, reinforcing plate; 2, tensioning assembly; 21, tensioning roller; 211, first waist-shaped hole; 212, second waist-shaped hole; 22, tensioning shaft; 23, bearing; 3, adjusting assembly; 31, lead screw; 311, ball head; 32, nut; 321, nut body; 3211, concave hole; 322, sliding pin; 41, first driver; 42, first coupling; 43, second driver; 44, second coupling; 45, pressure sensor; 46, controller; 5, connecting frame; 51, fixing hole. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In cigarette conveying mechanisms, due to various factors such as manufacturing tolerances of the belt itself, asymmetry of the joints, uneven wear of the rollers, and uneven load distribution, the belt is prone to lateral swaying, also known as "belt misalignment." This phenomenon not only accelerates the wear of the belt edges but can also, in severe cases, cause the belt to completely detach from the roller system, leading to production line shutdown and economic losses for the company.

[0025] Most belt tensioning mechanisms currently on the market use a single-screw tensioning method. While this method can solve the problem of belt slack caused by natural belt elongation, its tensioning direction is usually fixed (e.g., vertical or horizontal). This means it is limited to adjusting the overall belt tension and cannot effectively address belt misalignment. In other words, existing technology mainly focuses on providing sufficient tension to maintain the belt's normal operating condition, while it falls short in actively intervening to correct existing misalignment.

[0026] To solve the above problems, as shown in Figures 1 to 5, this embodiment provides an adjustable tension roller, which includes a fixed frame 1, a tensioning component 2, and an adjusting component 3. The fixed frame 1 is provided with two sliding grooves 121 spaced apart along the first direction X, and the sliding grooves 121 are recessed along the second direction Y. The tensioning component 2 includes a tension roller 21 and a tensioning shaft 22. The tension roller 21 passes through the tensioning shaft 22 and can rotate on the tensioning shaft 22. The two ends of the tensioning shaft 22 are respectively disposed in the two sliding grooves 121, and the two ends of the tensioning shaft 22 can slide in the two sliding grooves 121 respectively. The adjusting component 3 can independently adjust the position of the two ends of the tensioning shaft 22 in the corresponding sliding grooves 121, so that any end of the tensioning shaft 22 in the corresponding sliding groove 121 includes a sliding state relative to the fixed frame 1 along the second direction Y and a fixed state relative to the fixed frame 1. The first direction X and the second direction Y are perpendicular. The adjustable tension roller's mounting bracket 1 is fixed to the cigarette conveying mechanism. The conveyor belt 100 is fitted onto the tension roller 21, and the drive wheel drives the conveyor belt 100 to rotate, thus enabling the conveyor belt 100 to rotate on the tension roller 21. The tension of the conveyor belt 100 is adjusted by synchronously adjusting the positions of both ends of the tension shaft 22 within the two grooves 121 using the adjusting component 3. When the conveyor belt 100 deviates from its designated path, the pressure on one side of the tension roller 21 along the axial direction of the tension shaft 22 is less than the pressure on the other side. Therefore, the positions of both ends of the tension shaft 22 within the two grooves 121 are individually adjusted by the adjusting component 3 to cause the tension shaft 22 to tilt, gradually equalizing the pressure of the conveyor belt 100 on the tension roller 21. This actively intervenes and corrects the deviated phenomenon of the conveyor belt 100.

[0027] For example, taking the case where the conveyor belt 100 is tensioned as it moves along the second direction Y from the opening of the chute 121 to the bottom wall of the chute after the conveyor belt 100 is wound around the tension roller 21, when the conveyor belt 100 deviates from one end of the tension roller 22 to the other, the positions of the two ends of the tension roller 22 within the two chute 121 are adjusted. This causes the other end of the tension roller 22 to be closer to the bottom wall of the chute 121 relative to the first end, causing the tension roller 22 to deflect. This gradually makes the pressure of the entire conveyor belt 100 on the tension roller 21 more uniform, thus actively intervening and correcting the deviation that has already occurred in the conveyor belt 100.

[0028] Optionally, the tensioning assembly 2 further includes at least two bearings 23, which are sleeved on the tensioning shaft 22 and spaced apart sequentially. The tensioning roller 21 is sleeved on the tensioning shaft 22, so that the bearings 23 support the tensioning roller 21, thereby enabling the tensioning roller 21 to rotate on the tensioning shaft 22. Specifically, this embodiment provides two bearings 23, which respectively support the two ends of the tensioning roller 21.

[0029] Optionally, the fixed frame 1 includes a base plate 11 and two side plates 12 spaced apart on the base plate 11 along the first direction X. The two side plates 12 have grooves 121 recessed on their end faces away from the base plate 11 along the second direction Y. The grooves 121 are recessed along the second direction Y and opposite to each other along the first direction X. The two ends of the tensioning shaft 22 can be slidably disposed in the two grooves 121.

[0030] Optionally, the mounting bracket 1 also includes a reinforcing plate 13, which is detachably connected to the end faces of the two side plates 12 away from the base plate 11, thereby improving the overall strength of the mounting bracket 1. The detachable connection between the reinforcing plate 13 and the two side plates 12 facilitates the installation and subsequent maintenance of the tensioning assembly 2 and the adjusting assembly 3.

[0031] Optionally, the reinforcing plate 13 is connected to the side plate 12 by bolts.

[0032] Optionally, the adjusting assembly 3 includes two lead screws 31 and two nuts 32. The two lead screws 31 are respectively disposed in two slide grooves 121. One end of the lead screw 31 is connected to the bottom wall of the corresponding slide groove 121 along the second direction Y, and the lead screw 31 can swing relative to the bottom wall of the groove and rotate around the axis of the lead screw 31. The other end of the lead screw 31 points to the opening of the slide groove 121 along the second direction Y. The two nuts 32 are respectively disposed at both ends of the tensioning shaft 22. The nuts 32 can swing relative to the tensioning shaft 22 and slide along the axial direction of the tensioning shaft 22. The two nuts 32 are screwed one-to-one with the two lead screws 31. In this embodiment, by turning the lead screw 31, the nuts 32 on the lead screw 31 move on the lead screw 31, thereby driving both ends of the tensioning shaft 22 to slide in the slide grooves 121 respectively, so as to adjust the deflection angle of the tensioning roller 21. Since the length of the tensioning shaft 22 is fixed, the lead screw 31 and the corresponding nut 32 must be set on the same axis. Therefore, when the tensioning shaft 22 deflects, it will inevitably change the distance between the two nuts 32, the axial angle of the nuts 32, and the angle of the lead screw 31. This allows the lead screw 31 to swing relative to the bottom wall of the groove and rotate around the axis of the lead screw 31, and the nut 32 to swing relative to the tensioning shaft 22 and slide along the axial direction of the tensioning shaft 22, so as to adapt to the angle change of the tensioning shaft 22.

[0033] To enable the lead screw 31 to oscillate relative to the bottom wall of the groove and rotate about its axis, optionally, one end of the lead screw 31 is provided with a ball head 311, and the bottom wall of the groove is recessed with a ball socket 122, with the ball head 311 positioned within the corresponding ball socket 122. In this embodiment, the ball head 311 is positioned within the corresponding ball socket 122, thereby achieving a ball joint between the lead screw 31 and the side plate 12, thus enabling the lead screw 31 to oscillate and rotate about its own axis.

[0034] Optionally, the opening diameter of the ball socket 122 is smaller than the maximum diameter of the ball head 311. The ball head 311 is pressed into the ball socket 122 by compressive stress, which ensures that the lead screw can rotate and swing while preventing the ball head 311 from coming out of the ball socket 122.

[0035] Optionally, the side plate 12 is also provided with an oil injection hole, which is connected to the ball socket 122 on the side plate 12, so that lubricating oil can be injected into the ball socket 122 to reduce the friction of the ball head 311 in the ball socket 122 and reduce wear.

[0036] In other embodiments, the side plate 12 can be divided into a first part and a second part along the second direction Y, and the ball socket 122 can be divided into a first hemispherical socket 122 and a second hemispherical socket 122. The first hemispherical socket 122 and the second hemispherical socket 122 are located on the first part and the second part, respectively. The sliding groove is located on the first part and communicates with the first hemispherical socket 122. The lead screw 31 passes through the first hemispherical socket 122 and is inserted into the sliding groove. By connecting the first part and the second part, the ball socket 122 is formed to limit the ball head 311 within the ball socket 122. This arrangement is beneficial for the installation of the ball head 311.

[0037] Optionally, the first and second parts are connected by bolts.

[0038] Optionally, the tensioning shaft 22 has first oblong holes 211 at both ends, with the length of the first oblong holes 211 extending along the axis of the tensioning shaft 22. The nut 32 includes a nut body 321 and a connector. The nut bodies 321 of the two nuts 32 are inserted into the two first oblong holes 211 one-to-one. The connector allows the corresponding nut body 321 to swing within the first oblong hole 211, and also allows the corresponding nut body 321 to slide within the first oblong hole 211 along the axis of the tensioning shaft 22. In this embodiment, when the lead screw 31 rotates, the nut body 321 moves on the lead screw 31, thereby driving the tensioning shaft 22 to undergo angular displacement. During this process, the length of the tensioning shaft 22 is constant; therefore, the position and angle of the nut body 321 on the tensioning shaft 22 need to be adjusted to ensure the coaxiality of the lead screw 31 and the nut body 321. Therefore, the connector allows the nut body 321 to slide within the first oblong hole 211 and also to swing within the first oblong hole 211.

[0039] Optionally, for the specific structure of the connector, the tensioning shaft 22 has two coaxial second waist-shaped holes 212 corresponding to the first waist-shaped hole 211 at both ends. The axes of the first waist-shaped hole 211 and the corresponding two second waist-shaped holes 212 are perpendicular and interconnected. The length direction of the second waist-shaped holes 212 extends along the axis of the tensioning shaft 22. The connector includes two sliding pins 322 protruding radially from the nut body 321. The two sliding pins 322 on the nut body 321 are respectively inserted into the two second waist-shaped holes 212 opposite to the nut body 321. The length of the sliding pin 322 inserted into the corresponding second waist-shaped hole 212 is greater than the length of the second waist-shaped hole 212 along the axial direction of the tensioning shaft 22. In this embodiment, the two sliding pins 322 slide and rotate within the second waist-shaped holes 212 to realize the sliding and swinging of the nut body 321 within the first waist-shaped hole 211. The length of the sliding pin 322 inserted into the corresponding second waist-shaped hole 212 is greater than the length of the second waist-shaped hole 212 along the tensioning shaft 22, so that when the lead screw 31 rotates, the inner wall of the sliding pin 322 and the second waist-shaped hole 212 abuts against each other, and the nut 32 will not rotate with the lead screw 31, so as to realize the nut 32 moving along the axial direction of the lead screw 31.

[0040] Optionally, the circumferential wall of the nut body 321 is provided with two coaxial recesses 3211 along the radial direction of the nut body 321, and two sliding pins 322 are inserted into the two recesses 3211 in a corresponding manner and connected to the nut body 321. In this embodiment, the two recesses 3211 are coaxially arranged so that the sliding pins 322 inserted into the two recesses 3211 are coaxially arranged so that the nut body 321 can rotate about the axis of the sliding pins 322.

[0041] For ease of installation, the two sliding pins 322 and the nut body 321 are detachably connected. When installing the nut 32, the nut body 321 is first placed in the first oblong hole 211, and the two concave holes 3211 are respectively opposite to the two second oblong holes 212. Finally, the two sliding pins 322 are respectively inserted into the two concave holes 3211 after passing through the two second oblong holes 212.

[0042] Optionally, the sliding pin 322 is interference-fitted with the nut body 321; in other embodiments, the sliding pin 322 is threadedly connected to the nut body 321. In other embodiments, the sliding pin 322 is snap-fitted to the nut body 321.

[0043] Optionally, the adjustable tension roller further includes a drive assembly, which includes a first driver 41, a first coupling 42, a second driver 43, and a second coupling 44. The first driver 41 is connected to the other end of one lead screw 31 via the first coupling 42, and the second driver 43 is connected to the other end of another lead screw 31 via the second coupling 44. In this embodiment, the first coupling 42 allows the first driver 41 to still drive the lead screw 31 to rotate even when one lead screw 31 is swinging, thus enabling the first driver 41 to drive the lead screw 31 to rotate even when its position is fixed. Similarly, the second coupling 44 allows the second driver 43 to still drive the other lead screw 31 to rotate even when its position is fixed.

[0044] Specifically, the first coupling 42 and the second coupling 44 are both existing technologies and will not be described in detail here.

[0045] Optionally, both the first driver 41 and the second driver 43 are motors.

[0046] Optionally, the drive assembly further includes two pressure sensors 45, which are configured to be disposed on both sides of the conveyor belt 100 along a first direction X. The two pressure sensors 45 respectively monitor the pressure exerted by the conveyor belt 100 along the first direction X on the two pressure sensors 45. The drive assembly also includes a controller 46, which controls the operating state of the first driver 41 and the second driver 43 based on the signals monitored by the two pressure sensors 45. In this embodiment, the two pressure sensors 45 are respectively disposed on both sides of the conveyor belt 100. When the conveyor belt 100 does not deviate, the pressure between the two pressure sensors 45 and the conveyor belt 100 fluctuates within a preset range. When the conveyor belt 100 deviates, and the pressure measured by the two pressure sensors 45 exceeds the preset range, the first driver 41 and the second driver 43 are controlled to operate to adjust the angle of the tension shaft 22. When the pressure between the two pressure sensors 45 and the conveyor belt 100 fluctuates within the preset range again, the first driver 41 and the second driver 43 stop operating.

[0047] Pressure sensor 45 is existing technology and will not be described in detail here.

[0048] Optionally, the adjustable tension roller also includes a connecting frame 5, which is connected to the fixed frame 1. The connecting frame 5 is provided with multiple fixing holes 51, the axis of which is perpendicular to the plane containing the first direction X and the second direction Y. The diameter of the fixing hole 51 is larger than the stud diameter of the fixing bolt and smaller than the screw head diameter of the fixing bolt. The fixing bolt passes through the corresponding fixing hole 51 and is screwed to the frame. In this embodiment, the connecting frame 5 can fix the fixed frame 1 on the frame of the cigarette conveying mechanism. Since the diameter of the fixing hole 51 is larger than the stud diameter of the fixing bolt and smaller than the screw head diameter of the fixing bolt, before fixing the connecting frame 5 to the frame with the fixing bolt, there is a gap between the hole wall of the fixing hole 51 and the stud of the fixing bolt. The angle and position of the connecting frame 5 in the plane containing the first direction X and the second direction Y can be finely adjusted, thereby adjusting the angle of the tension shaft 22 in the plane containing the first direction X and the second direction Y, so as to achieve the initial adjustment of the tension shaft 22. After the initial adjustment is completed, the connecting frame 5 is fixed to the frame with the fixing bolt, so as to achieve the relative fixation of the fixed frame 1 and the frame.

[0049] This embodiment also provides a cigarette conveying mechanism, including the adjustable tension roller in the above scheme. The adjustable tension roller is fixed on the frame of the cigarette conveying mechanism. The frame is provided with drive rollers and adjustable tension rollers at intervals along the second direction. The conveyor belt 100 is sleeved on the drive rollers and tension rollers 21.

[0050] As shown in Figure 6, this embodiment also provides an automatic deviation adjustment method, which is adjusted by the adjustable tension roller in any of the above schemes.

[0051] The automatic deviation adjustment method includes: S10: Two pressure sensors 45 respectively monitor the pressure F1 and F2 acting on the two pressure sensors 45 along the first direction X of the conveyor belt 100.

[0052] S20: If F1 is within the preset range a and F2 is within the preset range a, then execute S30; otherwise, execute S40.

[0053] In this step, 'a' is a range value. When both F1 and F2 are within the preset range 'a', it is considered that the conveyor belt 100 has not deviated. When either F1 or F2 is outside the preset range 'a', it is considered that the conveyor belt 100 has deviated.

[0054] When the conveyor belt 100 is not working and does not deviate, the pressure exerted by the conveyor belt 100 on the two pressure sensors 45 is 0N, so the minimum boundary value of a is 0N. When F1 is outside the preset range a, it indicates that the value of F1 is greater than the maximum boundary value of a. When F2 is outside the preset range a, it indicates that the value of F2 is greater than the maximum boundary value of a.

[0055] For example, the range of a is 0N-3N. When F1 is outside the preset range a, it indicates that the value of F1 is greater than the maximum boundary value of a, 3N. When F2 is outside the preset range a, it indicates that the value of F2 is greater than the maximum boundary value of a, 3N.

[0056] S30: The adjustable tension roller is not moving. At this time, the conveyor belt 100 is not deviating, so the adjustable tension roller does not need to be adjusted.

[0057] S40: Adjust the adjustable tension roller until F1 is within the preset range a and F2 is within the preset range a.

[0058] In this step, the angle of the adjustable tension roller 21 needs to be adjusted so that F1 and F2 are within the preset range a, in order to improve or correct the misalignment problem of the conveyor belt 100.

[0059] Optionally, the first driver 41 and the pressure sensor measuring pressure F1 are located on one side of the conveyor belt 100, and the second driver 43 and the pressure sensor measuring pressure F2 are located on the other side of the conveyor belt 100.

[0060] The two lead screws 31 are driven to rotate, which in turn causes the two nuts 32 to move toward the bottom wall of the trough 121, thereby increasing the distance between the tension roller 21 and the drive roller, and thus achieving tensioning of the conveyor belt 100.

[0061] S40 specifically includes: S401: Determine which of F1 and F2 is outside the preset range a. If F1 is outside the preset range a, execute S402. If F2 is outside the preset range a, execute S403. S402: The first driver 41 operates, causing the nut 32 on the lead screw 31 connected to the first driver 41 to move towards the bottom wall of the groove; and / or the second driver 43 operates, causing the nut 32 on the lead screw 31 connected to the second driver 43 to move away from the bottom wall of the groove until F1 is within the preset range a.

[0062] Optionally, in this step, to prevent the nut 32 from detaching from the corresponding lead screw 31 or colliding with the bottom wall of the groove, the first driver 41 stops working when the distance between the nut 32 on the lead screw 31 connected to the first driver 41 and the bottom wall of the groove is less than a preset value b. Similarly, the second driver 43 stops working when the distance between the nut 32 on the lead screw 31 connected to the second driver 43 and the distance away from the bottom wall of the groove is less than a preset value b. The length of the lead screw is L, b = c * b, 0 < c ≤ 0.3.

[0063] S403: The second driver 43 operates, causing the nut 32 on the lead screw 31 connected to the second driver 43 to move closer to the bottom wall of the groove; and / or the first driver 41 operates, causing the nut 32 on the lead screw 31 connected to the first driver 41 to move away from the bottom wall of the groove, until F2 is within the preset range a.

[0064] Optionally, in this step, to prevent the nut 32 from detaching from the corresponding lead screw 31 or colliding with the bottom wall of the groove, the first driver 41 stops working when the distance between the nut 32 on the lead screw 31 connected to the first driver 41 and the bottom wall of the groove is less than a preset value b. Similarly, the second driver 43 stops working when the distance between the nut 32 on the lead screw 31 connected to the second driver 43 and the bottom wall of the groove is less than the preset value b. The length of the lead screw is L, b = c * b, 0 < c ≤ 0.3.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An adjustable tension roller, characterized in that, include: A fixing frame (1) is provided with two sliding grooves (121) spaced apart along a first direction (X), and the sliding grooves (121) are recessed along a second direction (Y); a tensioning assembly (2) includes a tensioning roller (21) and a tensioning shaft (22), the tensioning roller (21) passing through the tensioning shaft (22) and being able to rotate on the tensioning shaft (22), the two ends of the tensioning shaft (22) being respectively disposed in the two sliding grooves (121), and the two ends of the tensioning shaft (22) being able to rotate on the tensioning shaft (22). The tension shaft (22) can slide in the two grooves (121) respectively; the adjustment component (3) can independently adjust the position of the two ends of the tension shaft (22) in the corresponding grooves (121) so that either end of the tension shaft (22) in the corresponding groove (121) includes a sliding state relative to the fixing frame (1) along the second direction (Y) and a fixed state relative to the fixing frame (1); the first direction (X) and the second direction (Y) are perpendicular.

2. The adjustable tension roller according to claim 1, characterized in that, The adjusting assembly (3) includes: two lead screws (31), which are respectively disposed in two slides (121). One end of each lead screw (31) is connected to the bottom wall of the corresponding slide (121) along the second direction (Y). The lead screw (31) can swing relative to the bottom wall of the slide and rotate around the axis of the lead screw (31). The other end of the lead screw (31) points to the opening of the slide (121) along the second direction (Y); two nuts (32), which are respectively disposed at both ends of the tensioning shaft (22). The nuts (32) can swing relative to the tensioning shaft (22) and slide along the axial direction of the tensioning shaft (22). The two nuts (32) are screwed one-to-one with the two lead screws (31).

3. The adjustable tension roller according to claim 2, characterized in that, One end of the lead screw (31) is provided with a ball head (311), and the bottom wall of the groove is recessed with a ball socket (122), and the ball head (311) is disposed in the corresponding ball socket (122).

4. The adjustable tension roller according to claim 2, characterized in that, The tensioning shaft (22) has a first waist-shaped hole (211) at each end. The length of the first waist-shaped hole (211) extends along the axis of the tensioning shaft (22). The nut (32) includes a nut body (321) and a connector. The nut bodies (321) of the two nuts (32) are inserted into the two first waist-shaped holes (211) in a one-to-one correspondence. The connector allows the corresponding nut body (321) to swing in the first waist-shaped hole (211). The connector also allows the corresponding nut body (321) to slide along the axis of the tensioning shaft (22) in the first waist-shaped hole (211).

5. The adjustable tension roller according to claim 4, characterized in that, The tensioning shaft (22) has two coaxial second waist-shaped holes (212) at both ends, corresponding to the first waist-shaped hole (211). The axes of the first waist-shaped hole (211) and the two corresponding second waist-shaped holes (212) are perpendicular and interconnected. The length direction of the second waist-shaped hole (212) extends along the axis of the tensioning shaft (22). The connector includes two sliding pins (322) that protrude radially from the nut body (321) on the nut body (321). The two sliding pins (322) on the nut body (321) are respectively inserted into the two second waist-shaped holes (212) opposite to the nut body (321). The length of the sliding pin (322) inserted into the corresponding second waist-shaped hole (212) is greater than the length of the second waist-shaped hole (212) along the axial direction of the tensioning shaft (22).

6. The adjustable tension roller according to claim 5, characterized in that, The circumferential wall of the nut body (321) is provided with two coaxial recesses (3211) along the radial direction of the nut body (321). The two sliding pins (322) are inserted into the two recesses (3211) in a corresponding manner and are connected to the nut body (321).

7. The adjustable tension roller according to claim 2, characterized in that, It also includes a drive assembly, which includes a first driver (41), a first coupling (42), a second driver (43), and a second coupling (44). The first driver (41) is connected to the other end of one of the lead screws (31) via the first coupling (42), and the second driver (43) is connected to the other end of the other lead screw (31) via the second coupling (44).

8. The adjustable tension roller according to claim 7, characterized in that, The drive assembly further includes two pressure sensors (45), which are configured to be disposed on both sides of the conveyor belt (100) along the first direction (X). The two pressure sensors (45) respectively monitor the pressure exerted by the conveyor belt (100) on the two pressure sensors (45) along the first direction (X). The drive assembly further includes a controller (46), which controls the working state of the first driver (41) and the second driver (43) according to the signals monitored by the two pressure sensors (45).

9. The adjustable tension roller according to claim 1, characterized in that, It also includes a connecting frame (5), which is connected to the fixing frame (1). The connecting frame (5) is provided with a plurality of fixing holes (51). The axis of the fixing hole (51) is perpendicular to the plane containing the first direction (X) and the second direction (Y). The diameter of the fixing hole (51) is greater than the stud diameter of the fixing bolt and smaller than the screw head diameter of the fixing bolt. The fixing bolt passes through the corresponding fixing hole (51) and is screwed to the frame.

10. An automatic deviation adjustment method, characterized in that, The automatic deviation adjustment method, which is adjusted by the adjustable tension roller according to any one of claims 1-9, includes: two pressure sensors (45) respectively monitoring the acting pressure F1 and F2 of the conveyor belt (100) acting on the two pressure sensors (45) along the first direction (X); if F1 is within a preset range a and F2 is within the preset range a, then the adjustable tension roller does not move; if F1 is outside the preset range a or F2 is outside the preset range a, then the adjustable tension roller is adjusted until F1 is within the preset range a and F2 is within the preset range a.

Images