Dryer inner drum transmission belt tensioning wheel anti-deviation structure

Abstract

The utility model discloses a dryer inner tube transmission belt tensioning wheel anti -drifting structure, include: bow type mounting seat, bow type mounting seat inside rotationally connected with two groups of parallelly arranged connecting plate, and the both ends of two connecting plates are provided with tensioning wheel, and the inside middle section of tensioning wheel is fixedly connected with bearing structure, and the inside movable wear of bearing structure is equipped with fixed bolt, and the end screw joint of fixed bolt is equipped with fixed nut, and the end face of fixed bolt is provided with the accommodation groove, and the inside bottom of accommodation groove is fixedly connected with the tension spring, and the other end of tension spring is fixedly connected with movable disc and connecting rod in proper order, and the vertical fixed wear of connecting rod end is equipped with spring cylinder, and the inside of spring cylinder is provided with the close spring, and one end of close spring is fixedly connected with support rod and press screw block in proper order, sleeve one and sleeve two in the utility model control bearing axial clearance through high accuracy size, and fine thread enhances initial locking force, and the press screw block of tension spring and close spring drive forms the sustained axial pressure and lateral clamping force.

Description

Technical Field

[0001] This utility model relates to the technical field of tensioner pulley anti-deviation devices, specifically an anti-deviation structure for the tensioner pulley of the inner drum drive belt of a dryer. Background Technology

[0002] The anti-deviation structure of the tensioner pulley of the dryer inner drum drive belt refers to a series of mechanical structures designed in the dryer inner drum drive system to prevent the tensioner pulley from shifting axially or radially during belt drive due to uneven force, vibration, or installation errors. These structures typically include limiting protrusions, guide rails, positioning bearings, or elastic preload components. By constraining the movement trajectory of the tensioner pulley or providing stable support, these structures ensure that the pulley always maintains the correct position, thereby maintaining stable belt tension and reducing the risk of belt wear, abnormal noise, and transmission failure.

[0003] Existing Chinese patent document CN214197131U discloses an anti-deviation tensioning wheel, including a connecting plate. The inner walls of the front and rear sides of the connecting plate are fixedly connected via a rotating shaft A. A gear B and two baffle plates are sleeved on the surface of the rotating shaft A. The front and rear sides of the gear B are fixedly connected to the two baffle plates respectively. An extension rod is fixedly installed on the top of the connecting plate, and a metal plate A is fixedly installed on the bottom of the connecting plate. A sliding frame is fixedly installed on the bottom of the metal plate A. A sliding rod is slidably connected inside the sliding frame. The top of the sliding rod is flexibly connected to the top of the inner wall of the sliding frame via a spring. The connecting plate is slidably connected to the inner wall of the outer shell on both the front and rear sides through limiting frames and sliding balls, which can prevent the connecting plate from tilting forward or backward. When the transmission belt overlaps with the surface of gear B, the transmission belt will be located between two baffles and thus limited by the two baffles to prevent it from falling off during transmission. However, the anti-deviation structure of the tension wheel still has shortcomings: it does not take into account the axial positioning stability of the tension wheel bearing, and the bearing is prone to deviation due to axial movement. Moreover, the locking structure is mostly a conventional connection method, which is prone to loosening under long-term vibration of the equipment, resulting in the tension wheel becoming skewed. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the above-mentioned tensioning wheel anti-offset structure does not take into account the axial positioning stability of the tensioning wheel bearing, the bearing is prone to offset due to axial movement, and the locking structure is mostly a conventional connection method, which is prone to loosening under long-term vibration of the equipment, resulting in the tensioning wheel being skewed. Therefore, this utility model provides a tensioning wheel anti-offset structure for the inner drum drive belt of a dryer.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a structure for preventing deviation of the tensioning pulley of the inner drum drive belt of a dryer, comprising: an arch-shaped mounting base, wherein two sets of parallel connecting plates are rotatably connected inside the arch-shaped mounting base, a tensioning pulley is provided between the ends of the two sets of connecting plates, a bearing structure is fixedly connected to the middle section of the inner side of the tensioning pulley, a fixing bolt is movably inserted inside the bearing structure, a sleeve one and a sleeve two are movably sleeved on the fixing bolt, a fixing nut is screwed onto the end of the fixing bolt, a receiving groove is opened on the end face of the fixing bolt, a tensioning spring is fixedly connected to the bottom end inside the receiving groove, a movable disc is fixedly connected to the other end of the tensioning spring, a connecting rod is fixedly connected to the other side of the movable disc, a spring cylinder is fixedly inserted vertically at the end of the connecting rod, a tightening spring is provided inside the spring cylinder, and a support rod and a pressure screw block are sequentially fixed to one end of the tightening spring.

[0006] As a further embodiment of this utility model: both sets of connecting plates have bolt through holes at their ends for the fixing bolts to pass through. The bearing structure, sleeve one and sleeve two are all sleeved on the outside of the fixing bolts. Sleeve one and sleeve two are respectively set at both ends of the bearing structure and abut against both sides of the inner ring of the bearing structure. The fixing nut is screwed to one end of the fixing bolt to achieve stable positioning of the tensioning wheel bearing.

[0007] As a further embodiment of this utility model: the tension spring, the movable disc, and the connecting rod are all located in the storage groove. The tension spring is located inside the spring cylinder and is symmetrically fixed at both ends with a support rod and a pressure screw block structure. The end faces of the two sets of pressure screw blocks are firmly pressed against the outside of the fixing nut by the continuous tension force of the tension spring, so as to avoid vibration causing the screw connection to loosen and affect the axial positioning accuracy.

[0008] As a further embodiment of this utility model: a tension spring is fixedly connected to one end of the inner bottom surface of the bow-shaped mounting base, the other end of the tension spring extends out of the spring body and a limiting piece is fixedly connected to the end face, and a spring-passing plate is fixedly mounted between the two sets of connecting plates near the tension spring, and a spring-passing hole is opened through the center of the spring-passing plate for the end rod of the tension spring to pass through.

[0009] As a further improvement of this utility model: several sets of connecting blocks are fixedly connected to the outer sides of both sets of connecting plates, and reinforcing strips are fixedly connected to the outer sides of the connecting plates in parallel through several sets of connecting blocks.

[0010] As a further improvement of this utility model: a limiting rotating rod is transversely inserted at the connection between the bow-shaped mounting base and the two sets of connecting plates, and two sets of reinforcing strips are simultaneously inserted through the limiting rotating rod. The reinforcing strips and connecting plates on the same side are respectively clamped on the inner and outer sides of one side plate of the bow-shaped mounting base to reinforce the connection between the connecting plate and the bow-shaped mounting base and prevent swaying.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model innovatively adopts a composite design of "double sleeve rigid limit + fine thread nut locking + double elastic anti-loosening". Sleeve one and sleeve two control the axial clearance of the bearing through high-precision dimensions. The fine thread enhances the initial locking force, while the tension spring and the depressurization spring drive the pressure screw block to form continuous axial pressure and lateral clamping force. This design can not only control the axial movement clearance of the bearing within a very small range, but also prevent the nut from loosening for a long time in the high-frequency vibration environment of the dryer, thus solving the common problem of positioning failure caused by vibration in similar equipment. 2. This utility model constructs an anti-deviation system of "clamping connection + bending reinforcement + precise tension transmission". The connecting plate and the reinforcing strip clamp the side plate of the bow-shaped mounting seat. With the rigid insertion of the limiting rotating rod, the lateral gap at the connection is controlled to a very small range, which limits the sway from the root. The combination of the connecting block and the reinforcing strip significantly improves the bending stiffness of the connecting plate and avoids deformation under stress. The tension spring transmits tension along the axis of the connecting plate through the spring plate and eliminates the lateral component force. This multi-dimensional collaborative design realizes the whole chain anti-deviation from structural connection to force transmission, so that the parallelism error between the rotation plane of the tension wheel and the belt is always controlled to a very small range. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the anti-deviation structure of the tensioning pulley of the inner drum drive belt of the dryer described in this utility model; Figure 2 This is a schematic diagram of the connecting plate in the anti-deviation structure of the tensioning pulley of the inner drum drive belt of the dryer described in this utility model; Figure 3 This is a schematic diagram of the tensioning wheel in the anti-deviation structure of the tensioning wheel of the inner drum drive belt of the dryer described in this utility model; Figure 4 This is a schematic diagram of the fixing bolt in the anti-deviation structure of the tensioning pulley of the inner drum drive belt of the dryer described in this utility model; Figure 5 This is a schematic diagram of the tension spring in the anti-deviation structure of the tension wheel of the inner drum drive belt of the dryer described in this utility model.

[0013] In the diagram: 1. Bow-shaped mounting base; 2. Connecting plate; 201. Limiting rotating rod; 3. Tensioning wheel; 301. Bolt through hole; 4. Bearing structure; 5. Fixing bolt; 6. Sleeve 1; 7. Sleeve 2; 8. Fixing nut; 9. Storage groove; 10. Tensioning spring; 11. Movable disc; 12. Connecting rod; 13. Spring sleeve; 14. Tensioning spring; 15. Support rod; 16. Pressure screw block; 17. Tensioning spring; 18. Limiting plate; 19. Spring through plate; 20. Spring through hole; 21. Connecting block; 22. Reinforcing strip. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" 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 utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0016] Reference Figures 1 to 5 In this embodiment of the utility model, a structure for preventing deviation of the tensioning pulley of the inner drum drive belt of a dryer includes: an arch-shaped mounting base 1, two sets of parallel connecting plates 2 are rotatably connected inside the arch-shaped mounting base 1, a tensioning pulley 3 is provided between the ends of the two sets of connecting plates 2, a bearing structure 4 is fixedly connected to the middle section of the inner side of the tensioning pulley 3, a fixing bolt 5 is movably passed through the bearing structure 4, a sleeve 6 and a sleeve 7 are movably sleeved on the fixing bolt 5, a fixing nut 8 is screwed to the end of the fixing bolt 5, a receiving groove 9 is opened on the end face of the fixing bolt 5, a tension spring 10 is fixedly connected to the bottom end of the receiving groove 9, a movable disc 11 is fixedly connected to the other end of the tension spring 10, a connecting rod 12 is fixedly connected to the other side of the movable disc 11, a spring cylinder 13 is fixedly passed through the end of the connecting rod 12 vertically, a tightening spring 14 is provided inside the spring cylinder 13, a support rod 15 and a pressure block 16 are sequentially fixed to one end of the tightening spring 14.

[0017] Reference Figures 2 to 4Both sets of connecting plates 2 have bolt holes 301 at their ends for the fixing bolts 5 to pass through. The bearing structure 4, sleeve 1 6 and sleeve 2 7 are all sleeved on the outside of the fixing bolts 5. Sleeve 1 6 and sleeve 2 7 are respectively set at both ends of the bearing structure 4 and abut against both sides of the inner ring of the bearing structure 4. The fixing nut 8 is screwed into one end of the fixing bolt 5 to achieve stable positioning of the tension wheel 3 bearing.

[0018] The above scheme employs a method where the diameter of the bolt hole 301 is slightly larger than the diameter of the fixing bolt 5, ensuring smooth insertion of the fixing bolt 5 while avoiding excessive clearance that could cause wobbling. Sleeves 6 and 7 are made of high-precision cold-drawn steel tubing, with their lengths precisely designed according to the axial width of the bearing structure 4 to ensure no loosening when they abut against the inner ring of the bearing. The threaded fit between the fixing nut 8 and the fixing bolt 5 is a fine thread, which provides higher locking force and anti-loosening effect compared to coarse threads. This structure, through "double sleeve axial limiting + nut rigid locking," controls the axial movement clearance of the bearing structure 4 within a very small range, ensuring that the tensioning wheel 3 rotates flexibly with the belt while preventing the tensioning wheel from tilting due to axial bearing misalignment, thus significantly improving the stability of bearing positioning.

[0019] Reference Figure 4 The tension spring 10, movable disc 11 and connecting rod 12 are all located in the storage groove 9. The tension spring 14 is located inside the spring cylinder 13 and is symmetrically fixed at both ends with support rods 15 and pressure blocks 16. The end faces of the two sets of pressure blocks 16 are firmly pressed against the outside of the fixing nut 8 by the continuous tension force of the tension spring 10, so as to avoid vibration causing the screw connection to loosen and affect the axial positioning accuracy.

[0020] The above solution is adopted: the depth of the storage groove 9 is set to accommodate the tension spring 10, the movable disc 11, and the connecting rod 12, which facilitates the storage space when the above components are not in use. The tension spring 10 ensures that the movable disc 11 drives the connecting rod 12 to always apply tension to the spring cylinder 13. The tightening spring 14 can continuously pull the two sets of pressure screw blocks 16 inward. The end face of the pressure screw block 16 is processed with anti-slip texture, which increases the friction with the fixed nut 8 when it is extended. This structure forms a "double elastic anti-loosening". The tension spring 10 provides continuous axial pressure. Under the action of continuous tension, the pressure screw block 16 is in close contact with the side of the nut. Even if the dryer vibrates for a long time, it can effectively prevent the fixed nut 8 from loosening, which solves the problem that traditional single nut locking is prone to failure due to vibration. It keeps the axial positioning accuracy stable. The tightening spring 14 makes it easy to retract the two sets of support rods 15 when the structure is not in use, so that the pressure screw blocks 16 at the end can be put into the storage groove 9.

[0021] Reference Figure 5A tension spring 17 is fixedly connected to one end of the inner bottom surface of the bow-shaped mounting base 1. The other end of the tension spring 17 extends out of the spring body and a limit plate 18 is fixedly connected to the end face. A spring passer 19 is fixedly mounted between the two sets of connecting plates near the tension spring 17. A spring passer 20 is opened through the center of the spring passer 19 for the end rod of the tension spring 17 to pass through.

[0022] The above scheme employs the following: the tension spring 17 is made of a high-elasticity alloy material, and the initial preload is set according to the belt tension requirements. A certain gap is provided between the diameter of its end rod and the spring-passing hole 20 to ensure smooth insertion during tensioning. The diameter of the spring-passing hole 20 is larger than the cross-sectional diameter of the end rod of the tension spring 17 to prevent the tension spring 17 from falling out of the spring-passing plate 19. The spring-passing plate 19 is made of thick steel plate and stamped, with both ends welded and fixed to the connecting plate 2 to ensure no deformation under force. This structure continuously pulls the connecting plate 2 through the elastic force of the tension spring 17, so that the tension wheel 3 always applies stable tension to the belt, avoiding transmission slippage caused by belt slack. At the same time, the cooperation between the spring-passing plate 19 and the tension spring 17 ensures that the tension direction is always transmitted along the axis of the connecting plate 2, reducing the lateral deviation of the tension wheel caused by tension skew, thus balancing tension stability and anti-deviation effect.

[0023] Reference Figure 2 and Figure 5 Several sets of connecting blocks 21 are fixed to the outer sides of both sets of connecting plates 2. Reinforcing strips 22 are fixed to the outer sides of both sets of connecting blocks 21 in parallel. A limiting rotating rod 201 is transversely inserted at the connection between the bow-shaped mounting base 1 and the two sets of connecting plates 2. Two sets of reinforcing strips 22 are inserted simultaneously through the limiting rotating rod 201. The reinforcing strips 22 and the connecting plates 2 on the same side are respectively clamped on the inner and outer sides of one side plate of the bow-shaped mounting base 1 to reinforce the connection between the connecting plate 2 and the bow-shaped mounting base 1 and prevent swaying.

[0024] The above scheme is adopted: the reinforcing strip 22 is welded to the outer side of the corresponding connecting plate 2 through several sets of evenly distributed connecting blocks 21 to enhance the connection strength. The reinforcing strip 22 is set parallel to the connecting plate 2. With the design of the two clamping the side plate of the bow-shaped mounting seat 1, the bending stiffness of the connecting plate 2 can be significantly improved. The limiting rotating rod 201 rotates flexibly with the bow-shaped mounting seat 1, the connecting plate 2 and the reinforcing strip 22 with little radial sway. The reinforcing strip 22 and the connecting plate 2 on the same side clamp the side plate of the bow-shaped mounting seat 1 in the middle, which is coordinated with the insertion of the limiting rotating rod 201. The fixed structure keeps the lateral gap at the connection point within a very small range. The above structure enhances the overall rigidity of the connecting plate 2 through the connecting block 21 and the reinforcing strip 22, preventing it from bending and deforming under stress. The limiting rotating rod 201 and the clamping connection effectively limit the relative wobble between the connecting plate 2 and the bow-shaped mounting seat 1, ensuring that the rotation plane of the tension wheel 3 remains parallel to the belt. This completely solves the problem of tension wheel offset caused by component wobble from the structural connection level, greatly improving the stability and service life of the transmission system.

[0025] The working principle of this utility model is as follows: The whole is based on the bow-shaped mounting base 1 as the basic load-bearing component. It forms a rotatable connection with two sets of parallel connecting plates 2 through the limiting rotating rod 201, providing an adjustable support base for the tension wheel 3. The reinforcing strip 22, which is fixed to the outside of the connecting plate 2 through the connecting block 21, together with the connecting plate 2, clamps the side plate of the bow-shaped mounting base 1. With the rigid insertion of the limiting rotating rod 201, the structural rigidity of the connection is greatly improved, the relative sway between the connecting plate 2 and the bow-shaped mounting base 1 is limited, and the rotation plane of the tension wheel 3 is always kept parallel to the belt, thus blocking the offset caused by sway from the root of the connection. The core positioning of the tension wheel 3 is achieved through the fixing bolt 5. The bearing structure 4 provides flexible rotation support for the tension wheel 3. Its two ends are bidirectionally limited by sleeve 1 6 and sleeve 2 7. Both sleeve 1 6 and sleeve 2 7 are made of high-precision cold-drawn steel tubes and fit tightly with the inner ring of the bearing structure 4. With the fine-tooth fixing nut 8 at the end of the fixing bolt 5, the axial movement clearance of the bearing structure 4 is controlled to a very small range. This ensures that the tension wheel 3 rotates smoothly with the belt and avoids the tension wheel 3 from tilting due to the axial displacement of the bearing. At the same time, in the storage groove 9 at the end of the fixing bolt 5, the tension spring 10 continuously pulls the movable plate 11 and the connecting rod 12, so that the tension spring 14 in the spring cylinder 13 pushes the pressure block 16 to press the side of the fixing nut 8. The anti-slip texture of the pressure block 16 enhances the friction and forms a dual elastic anti-loosening mechanism of "axial pressure + lateral clamping". Even under high-frequency vibration of the equipment, it can prevent the nut from loosening and maintain the axial positioning accuracy. The stable transmission of belt tension is achieved by the tension spring 17, one end of which is fixed to the bow-shaped mounting base 1, and the other end is connected to the connecting plate 2 through the spring hole 20 on the spring plate 19. The limiting piece 18 prevents the spring from falling off. The preload of the tension spring 17 is transmitted along the axial direction of the connecting plate 2, so that the tension wheel 3 always presses tightly against the belt to avoid slack and slippage. The rigid structure of the spring plate 19 ensures the accurate tension direction and reduces the influence of lateral force on the offset of the tension wheel.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A structure for preventing deviation of the tensioner pulley of the inner drum drive belt in a dryer, comprising: A bow-shaped mounting base (1) is characterized in that two sets of parallel connecting plates (2) are rotatably connected inside the bow-shaped mounting base (1), a tension wheel (3) is provided between the ends of the two sets of connecting plates (2), a bearing structure (4) is fixedly connected to the middle section of the inner side of the tension wheel (3), a fixing bolt (5) is movably passed through the bearing structure (4), a sleeve one (6) and a sleeve two (7) are movably sleeved on the fixing bolt (5), and a fixing nut (8) is screwed onto the end of the fixing bolt (5). A storage groove (9) is provided on the end face of the fixed bolt (5). A tension spring (10) is fixedly connected to the bottom of the storage groove (9). A movable disc (11) is fixedly connected to the other end of the tension spring (10). A connecting rod (12) is fixedly connected to the other side of the movable disc (11). A spring cylinder (13) is fixedly inserted vertically at the end of the connecting rod (12). A tightening spring (14) is provided inside the spring cylinder (13). A support rod (15) and a pressure block (16) are fixedly connected to one end of the tightening spring (14) in sequence.

2. The anti-deviation structure for the tensioner pulley of the inner drum drive belt of a dryer according to claim 1, characterized in that, Both sets of connecting plates (2) have bolt through holes (301) at their ends for the fixing bolts (5) to pass through. The bearing structure (4), sleeve one (6) and sleeve two (7) are all sleeved on the outside of the fixing bolts (5). Sleeve one (6) and sleeve two (7) are respectively set at both ends of the bearing structure (4) and abut against both sides of the inner ring of the bearing structure (4). The fixing nut (8) is screwed into one end of the fixing bolt (5) to achieve stable bearing positioning of the tensioning wheel (3).

3. The anti-deviation structure for the tensioner pulley of the inner drum drive belt of a dryer according to claim 2, characterized in that, The tension spring (10), movable disc (11) and connecting rod (12) are all located in the storage groove (9). The tension spring (14) is located inside the spring cylinder (13) and both ends are symmetrically fixed with support rod (15) and pressure block (16) structure. The end faces of the two sets of pressure blocks (16) are firmly pressed against the outside of the fixing nut (8) by the continuous tension force of the tension spring (10), so as to avoid vibration causing the screw connection to loosen and affect the axial positioning accuracy.

4. The anti-deviation structure for the tensioner pulley of the inner drum drive belt of a dryer according to claim 1, characterized in that, A tension spring (17) is fixedly connected to one end of the inner bottom surface of the bow-shaped mounting base (1). The other end of the tension spring (17) extends out of the spring body and a limiting piece (18) is fixedly connected to the end face. A spring-passing piece (19) is fixedly mounted between the two sets of connecting plates (2) near the tension spring (17). A spring-passing hole (20) is opened through the center of the spring-passing piece (19) for the end rod of the tension spring (17) to pass through.

5. The anti-deviation structure for the tensioner pulley of the inner drum drive belt of a dryer according to claim 1, characterized in that, Both sets of connecting plates (2) are fixed to the outside of several sets of connecting blocks (21), and the outside of the connecting plates (2) are fixed to reinforcing strips (22) in parallel through several sets of connecting blocks (21).

6. The anti-deviation structure for the tensioner pulley of the inner drum drive belt of a dryer according to claim 5, characterized in that, A limiting rod (201) is transversely inserted at the connection between the bow-shaped mounting base (1) and the two sets of connecting plates (2), and two sets of reinforcing strips (22) are inserted simultaneously on the limiting rod (201). The reinforcing strips (22) and the connecting plates (2) on the same side are respectively clamped on the inner and outer sides of one side plate of the bow-shaped mounting base (1) to reinforce the connection between the connecting plates (2) and the bow-shaped mounting base (1) and prevent swaying.

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