Tensioner pulley structure

Abstract

The utility model relates to the technical field of pulley, disclose a kind of tension pulley structure, comprising: fixed base, swing plate, torsion spring, pulley body and limit rod.Fixed base, the fixed base is vertically provided with the fixed shaft extending along vertical direction.Swing plate, one end of the swing plate is provided with the shaft hole compatible with the fixed shaft, the swing plate is sleeved on the fixed shaft and can reciprocating swing around the axis of the fixed shaft.Torsion spring, it is sleeved on the outer periphery of the fixed shaft, two ends of the torsion spring respectively extend to the same side of the fixed base and the swing plate, and one end of the torsion spring is abutted to the side wall of the fixed base, the other end is abutted to the side wall of the swing plate, to provide the continuous swing pre-tightening force to swing plate by the elastic deformation of torsion spring.Pulley body, it is rotatably installed on the other end of the swing plate away from the fixed shaft around its axis, for with external belt sleeve joint and realize belt tensioning.

Description

Technical Field

[0001] This utility model relates to the field of belt pulley technology, specifically a tensioning belt pulley structure. Background Technology

[0002] The pulley structure is used to mount the drive belt to achieve long-distance power transmission and speed regulation.

[0003] In existing technologies, pulleys are typically rotatably positioned on an external connecting device via a single support point. However, during long-term operation, due to the continuous friction between the drive belt and the pulley, as well as the creep and tensile properties of the belt material itself, the belt tension gradually decreases, leading to belt slippage.

[0004] Therefore, a tensioning pulley structure is urgently needed to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a tensioning pulley structure to solve the problem of pulley slippage during long-term use.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A tensioning pulley structure, comprising: A fixed base, wherein a fixed shaft extending in a vertical direction is erected on the fixed base; A swing plate, one end of which has a shaft hole adapted to the fixed shaft, the swing plate is sleeved on the fixed shaft and can reciprocate around the axis of the fixed shaft; A torsion spring is sleeved on the outer periphery of the fixed shaft. The two ends of the torsion spring extend to the same side of the fixed seat and the swing plate, respectively. One end of the torsion spring abuts against the side wall of the fixed seat and the other end abuts against the side wall of the swing plate, so as to provide a continuous swing preload force to the swing plate through the elastic deformation of the torsion spring. The pulley body is rotatably mounted on the other end of the swing plate away from the fixed axis, and is used to engage with an external belt and achieve belt tensioning; At least two limiting rods are provided and protrude from both sides of the fixed base respectively. Both limiting rods extend along the swing trajectory of the swing plate. A gap space adapted to the swing plate is left between the two limiting rods to limit the swing angle of the swing plate.

[0007] As a preferred embodiment of the tensioning pulley structure, the top end of the fixed shaft is provided with a lever that can rotate around the axis of the fixed shaft. The surface of the lever is provided with a through hole that matches the top end of the torsion spring. The lever is also provided with an annular groove centered on the axis of the fixed shaft.

[0008] As a preferred embodiment of the tensioned pulley structure, it further includes an adjustment position component connected to the bottom or side wall of the fixed seat to adjust the fixed seat and thus adjust the initial relative position of the pulley body relative to the external belt.

[0009] As a preferred embodiment of the tensioning pulley structure, the adjusting position component is composed of a positioning plate. The surface of the positioning plate is provided with a plurality of positioning holes spaced apart along its length. The surface of the fixing seat is provided with a slot extending along the length of the positioning plate. The extending direction of the slot is consistent with the arrangement direction of the positioning holes.

[0010] As a preferred embodiment of the tensioning pulley structure, it further includes a guide assembly disposed between the fixed base and the positioning plate, wherein the extending direction of the guide assembly is consistent with the extending direction of the slot.

[0011] As a preferred embodiment of the tensioning pulley structure, the guide assembly includes a matching slider and a groove. The slider protrudes from the side surface of the fixed seat facing the positioning plate, and the groove is formed on the side surface of the positioning plate facing the fixed seat, extending along the length of the positioning plate. The slider is slidably embedded in the groove.

[0012] As a preferred embodiment of the tensioning pulley structure, the swing plate has a positioning shaft at the end away from the fixed shaft, the inner wall of the pulley body has a mounting hole adapted to the positioning shaft, and the pulley body is sleeved on the outer periphery of the positioning shaft by at least two spaced bearings.

[0013] As a preferred embodiment of the tensioning pulley structure, an annular baffle is integrally formed in the middle of the inner wall of the pulley body. The two sides of the annular baffle abut against the opposite end faces of two bearings, respectively. One end of the positioning shaft is provided with a radially outwardly extending flange, the end face of which abuts against the outer end face of one of the bearings. The other end of the positioning shaft is provided with an annular groove on its outer periphery, and an elastic retaining ring is fitted in the annular groove. The end face of the retaining ring abuts against the outer end face of the other bearing.

[0014] The beneficial effects of this invention are as follows: By cooperating with the torsion spring and the limiting rod, the swing angle of the swing plate is controlled. When the pulley is subjected to the force of the external belt, the swing plate swings around the fixed axis. At this time, the torsion spring undergoes elastic deformation, generating a preload force opposite to the swing direction, thereby automatically adjusting the belt tension. The limiting rods on both sides effectively limit the excessive swing of the swing plate, ensuring the stability and reliability of the pulley structure. This not only improves the efficiency of belt drive but also extends the service life of the belt and pulley. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure in the first direction of a tensioning pulley structure provided by this utility model; Figure 2 A schematic diagram of the overall structure in the second direction of a tensioning pulley structure provided by this utility model; Figure 3 A schematic diagram of the swinging of the swing plate in a tensioning belt pulley structure provided by this utility model; Figure 4 for Figure 3 Top view in the middle; Figure 5 An exploded view of a tensioning pulley structure provided by this utility model; Figure 6 This is a schematic diagram of the overall structure of the pulley body in a tensioning pulley structure provided by this utility model.

[0016] The following are the labeling elements in the figure: 1. Fixed base; 2. Fixed shaft; 3. Swing plate; 4. Shaft hole; 5. Torsion spring; 6. Pulley body; 7. Limiting rod; 8. Paddle; 9. Through hole; 10. Annular groove; 12. Position adjustment component; 13. Positioning plate; 14. Positioning hole; 15. Slot; 16. Guide assembly; 17. Slider; 18. Slide groove; 19. Positioning shaft; 20. Mounting hole; 21. Bearing; 22. Annular baffle; 23. Flange; 24. Annular groove; 25. Elastic retaining ring. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0018] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0021] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0022] In one embodiment of this utility model, such as Figure 1-6 As shown, a tensioning pulley structure is provided, including: a fixed base 1, a swing plate 3, a torsion spring 5, a pulley body 6, and a limiting rod 7. The fixed base 1 has a fixed shaft 2 extending vertically. The swing plate 3 has a shaft hole 4 at one end that matches the fixed shaft 2; the swing plate 3 is sleeved on the fixed shaft 2 and can reciprocate around the axis of the fixed shaft 2. The torsion spring 5 is sleeved on the outer periphery of the fixed shaft 2; both ends of the torsion spring 5 extend to the same side of the fixed base 1 and the swing plate 3, respectively. One end of the torsion spring 5 abuts against the side wall of the fixed base 1, and the other end abuts against the side wall of the swing plate 3, so as to provide a continuous swinging preload to the swing plate 3 through the elastic deformation of the torsion spring 5. The pulley body 6 is rotatably mounted on the other end of the swing plate 3 away from the fixed shaft 2, and is used to engage with an external belt to achieve belt tensioning. At least two limiting rods 7 are provided and protrude from both sides of the fixed base 1 respectively. Both limiting rods 7 extend along the swing trajectory of the swing plate 3. A gap space is left between the two limiting rods 7 to match the swing plate 3, so as to limit the swing angle of the swing plate 3.

[0023] The tensioning pulley structure provided by this utility model, through the cooperation of torsion spring 5 and limiting rod 7, achieves control over the swing angle of the swing plate 3. When the pulley body 6 is subjected to the force of the external belt, the swing plate 3 will swing around the fixed shaft 2. At this time, the torsion spring 5 undergoes elastic deformation, generating a preload force opposite to the swing direction, thereby automatically adjusting the belt tension. The limiting rods 7 on both sides effectively limit the excessive swing of the swing plate 3, ensuring the stability and reliability of the pulley structure. This not only improves the efficiency of belt drive but also extends the service life of the belt and pulley.

[0024] Preferably, the top end of the fixed shaft 2 is provided with a lever 8 that can rotate around the axis of the fixed shaft 2. The central area of ​​the lever 8 is provided with a through hole 9 that is adapted to the top end of the torsion spring 5. The top end of the torsion spring 5 is inserted into the through hole 9 to realize the linkage between the torsion spring 5 and the lever 8. The lever 8 is also provided with an annular slot 10 with the axis of the fixed shaft 2 as the center. The lever 8 is rotatably positioned and connected to the fixed shaft 2 by a fastening bolt that passes through the annular slot 10 and is threaded to the top end of the fixed shaft 2.

[0025] When the preload of the torsion spring 5 needs adjustment, simply loosen the fastening bolts to allow the lever 8 to rotate around the axis of the fixed shaft 2. By rotating the lever 8, the initial compression of the torsion spring 5 is changed, thereby adjusting the magnitude of the preload generated by the torsion spring 5. After adjusting to the appropriate position, tighten the fastening bolts again to securely position the lever 8 on the fixed shaft 2, ensuring a stable and reliable linkage between the torsion spring 5 and the lever 8. This guarantees that the tensioning pulley structure can continuously and stably perform its function of automatically adjusting belt tension.

[0026] The tensioning pulley structure also includes an adjustment position component 12, which is connected to the bottom or side wall of the fixed seat 1 to adjust the fixed seat 1 and thus adjust the initial relative position of the pulley body 6 relative to the external belt.

[0027] Furthermore, the position adjustment component 12 is composed of a positioning plate 13. The surface of the positioning plate 13 is provided with a plurality of positioning holes 14 spaced apart along its length direction. The surface of the fixing base 1 is provided with a slot 15 extending along the length direction of the positioning plate 13. The extending direction of the slot 15 is consistent with the arrangement direction of the positioning holes 14.

[0028] When it is necessary to adjust the initial relative position of the pulley body 6, simply move the fixing seat 1 along the slot 15 direction, aligning and fixing the corresponding connecting structure (such as bolts) on the fixing seat 1 with the positioning holes 14 at different positions on the positioning plate 13. This changes the position of the fixing seat 1, thereby adjusting the initial relative position of the pulley body 6 relative to the external belt. This allows for more precise control of the belt tension. By fixing the fixing seat 1 at different positioning holes 14, the contact position and tension between the pulley body 6 and the external belt can be flexibly adjusted according to actual working requirements. This ensures that the belt maintains optimal tension during operation, reduces belt wear and slippage, and improves the working efficiency and stability of the entire transmission system.

[0029] Furthermore, the tensioning pulley structure also includes a guide assembly 16, which is disposed between the fixed base 1 and the positioning plate 13, and the extending direction of the guide assembly 16 is consistent with the extending direction of the slot 15.

[0030] Specifically, the guide assembly 16 includes a matching slider 17 and a groove 18. The slider 17 protrudes from the surface of the fixed base 1 facing the positioning plate 13, and the groove 18 is formed on the surface of the positioning plate 13 facing the fixed base 1, extending along the length of the positioning plate 13. The slider 17 is slidably embedded in the groove 18. The usage process is as follows: When the position of the fixed seat 1 needs to be adjusted, the slider 17 slides along the groove 18. Since the extension direction of the groove 18 is consistent with the extension direction of the slot 15, it provides a precise and stable guide for the movement of the fixed seat 1. During the movement of the fixed seat 1, the cooperation between the slider 17 and the groove 18 ensures that the fixed seat 1 always moves in the predetermined direction without any deviation or shaking. This allows the corresponding connecting structure on the fixed seat 1 to be more accurately and smoothly aligned and fixed with the positioning holes 14 at different positions on the positioning plate 13, further ensuring the accuracy of the initial relative position adjustment of the pulley body 6.

[0031] Preferably, the swing plate 3 is provided with a positioning shaft 19 at one end away from the fixed shaft 2, and the inner wall of the pulley body 6 is provided with a mounting hole 20 that is adapted to the positioning shaft 19. The pulley body 6 is sleeved on the outer periphery of the positioning shaft 19 through at least two spaced bearings 21.

[0032] The arrangement of at least two spaced bearings 21 not only effectively distributes the load generated during the operation of the pulley body 6, reduces the burden on a single bearing 21, and extends the service life of the bearing 21, but also further enhances the smoothness of the rotation of the pulley body 6, reduces vibration and noise during operation, and improves the working performance and reliability of the entire tensioning pulley structure.

[0033] Furthermore, an annular baffle 22 is integrally formed in the middle of the inner wall of the pulley body 6. The two sides of the annular baffle 22 abut against the opposite end faces of the two bearings 21 respectively. One end of the positioning shaft 19 is provided with a radially outwardly extending flange 23. The end face of the flange 23 abuts against the outer end face of one of the bearings 21. An annular groove 24 is opened on the outer periphery of the other end of the positioning shaft 19. An elastic retaining ring 25 is fitted in the annular groove 24. The end face of the retaining ring abuts against the outer end face of the other bearing 21.

[0034] The interplay of the annular baffle 22, flange 23, and elastic retaining ring 25 enables precise axial positioning of the two bearings 21, preventing axial movement during operation. This design is not only simple in structure and easy to manufacture, but also effectively ensures the installation accuracy of the bearings 21, improving the stability and reliability of the pulley body 6's rotation. Furthermore, the elastic retaining ring 25 facilitates the disassembly and replacement of the bearings 21, reducing equipment maintenance costs and time.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A tensioning pulley structure, characterized in that, include: A fixed base, wherein a fixed shaft extending in a vertical direction is erected on the fixed base; A swing plate, one end of which has a shaft hole adapted to the fixed shaft, the swing plate is sleeved on the fixed shaft and can reciprocate around the axis of the fixed shaft; A torsion spring is sleeved on the outer periphery of the fixed shaft. The two ends of the torsion spring extend to the same side of the fixed seat and the swing plate, respectively. One end of the torsion spring abuts against the side wall of the fixed seat and the other end abuts against the side wall of the swing plate, so as to provide a continuous swing preload force to the swing plate through the elastic deformation of the torsion spring. The pulley body is rotatably mounted on the other end of the swing plate away from the fixed axis, and is used to engage with an external belt and achieve belt tensioning; At least two limiting rods are provided and protrude from both sides of the fixed base respectively. Both limiting rods extend along the swing trajectory of the swing plate. A gap space adapted to the swing plate is left between the two limiting rods to limit the swing angle of the swing plate.

2. The tensioning pulley structure according to claim 1, characterized in that, The top end of the fixed shaft is provided with a paddle that can rotate around the axis of the fixed shaft. The surface of the paddle is provided with a through hole that matches the top end of the torsion spring. The paddle is also provided with an annular groove centered on the axis of the fixed shaft.

3. A tensioning pulley structure according to claim 1 or 2, characterized in that, It also includes a position adjustment component connected to the bottom or side wall of the fixed seat to adjust the fixed seat and thus adjust the initial relative position of the pulley body relative to the external belt.

4. The tensioning pulley structure according to claim 3, characterized in that, The position adjustment component is composed of a positioning plate. The surface of the positioning plate is provided with a plurality of positioning holes spaced apart along its length. The surface of the fixing base is provided with a slot extending along the length of the positioning plate. The extension direction of the slot is consistent with the arrangement direction of the positioning holes.

5. The tensioning pulley structure according to claim 4, characterized in that, It also includes a guide component, which is disposed between the fixed base and the positioning plate, and the extension direction of the guide component is consistent with the extension direction of the slot.

6. The tensioning pulley structure according to claim 5, characterized in that, The guide assembly includes a matching slider and a groove. The slider protrudes from the side surface of the fixed base facing the positioning plate, and the groove is formed on the side surface of the positioning plate facing the fixed base, extending along the length of the positioning plate. The slider is slidably embedded in the groove.

7. A tensioning pulley structure according to claim 1, 2, 4, 5, or 6, characterized in that, The swing plate is provided with a positioning shaft at one end away from the fixed shaft, and the inner wall of the pulley body is provided with a mounting hole adapted to the positioning shaft. The pulley body is sleeved on the outer periphery of the positioning shaft through at least two spaced bearings.

8. The tensioning pulley structure according to claim 7, characterized in that, An annular baffle is integrally formed in the middle of the inner wall of the pulley body. The two sides of the annular baffle abut against the opposite end faces of the two bearings respectively. One end of the positioning shaft is provided with a radially outwardly extending flange. The end face of the flange abuts against the outer end face of one of the bearings. An annular groove is opened on the outer periphery of the other end of the positioning shaft. An elastic retaining ring is inserted in the annular groove. The end face of the retaining ring abuts against the outer end face of the other bearing.

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