A tensioner

Abstract

This application discloses a tensioner, belonging to the technical field of tensioner technology. The tensioner includes a lower clamp, an upper clamp, and a belt shaft. The lower clamp has a first belt shaft hole, and the upper clamp has a second belt shaft hole; the lower clamp is mounted inside the upper clamp. The belt shaft passes sequentially through the corresponding first and second belt shaft holes, and its end is equipped with a ratchet and a locking element. The core improvement of this utility model lies in the integrally formed axially extending flange at the first belt shaft hole. The inner wall of the flange forms a support surface that rotatably engages with the belt shaft, and the second belt shaft hole is fitted onto the flange. This design replaces the traditional independent bushing with an integrated flange, effectively simplifying the structure, reducing the number of parts and assembly steps, and lowering costs. Simultaneously, the flange provides a smooth and stable support for the belt shaft, significantly reducing rotational friction and wear, making belt winding and unwinding operations smoother.

Description

Technical Field

[0001] This utility model belongs to the field of tensioner technology, and specifically relates to a tensioner. Background Technology

[0002] In the current tensioner industry, to ensure smooth rotation of the belt shaft within the bracket hole and reduce wear, the common approach is to add independent anti-friction components. The most common solution is to install an independent bushing between the belt shaft and the bracket. However, this anti-friction solution has inherent limitations:

[0003] First, the structure is complex and costly. Adding independent bushings and other parts not only directly increases material costs, but also means requiring more assembly processes and more complex quality control, increasing process complexity and manufacturing costs.

[0004] Secondly, the friction-reducing effect is not lasting and is prone to jamming. After being subjected to radial forces and impact loads for a long time, the split bushing is prone to wear, deformation, or even damage, which increases the rotational resistance. Its inherent assembly clearance may cause the component to wobble during operation, resulting in jamming and irregularities in the belt shaft during belt winding or unwinding, affecting operational efficiency. Utility Model Content

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0006] A tensioner includes a lower clamp, an upper clamp, and a belt shaft. The lower clamp has a limiting component, and first shaft holes are provided on both sides of one end of the lower clamp. The upper clamp has a stop component, and second shaft holes are provided on both sides of one end of the upper clamp. The lower clamp is located inside the upper clamp, such that the two first shaft holes are located between the two second shaft holes. The two ends of the belt shaft pass sequentially through the corresponding first and second shaft holes, and a ratchet is installed at the end of the belt shaft extending out of the second shaft hole. A locking member is provided on the outer side of the ratchet for locking the lower clamp, upper clamp, and ratchet onto the belt shaft. One end of the limiting component and one end of the stop component can engage and disengage with the ratchet. A flange extending outward along its axial direction is provided at the first shaft hole, and the inner wall of the flange forms a support surface that rotatably engages with the outer peripheral surface of the belt shaft; the second shaft hole is fitted onto the flange.

[0007] In a preferred embodiment of the tensioner, the axial dimension of the flange does not exceed the depth of the second shaft hole. This ensures that the flange can be fully accommodated within the second shaft hole, achieving a compact structure, avoiding assembly interference or structural mismatch problems caused by an excessively long flange, and guaranteeing the precision and reliability of the fit between components.

[0008] As a preferred embodiment of the tensioner, the flange and the lower clamp are integrally formed, further enhancing structural strength and avoiding the loosening problems that may occur with separate parts. At the same time, this integral forming process simplifies the production process, improves processing efficiency, and reduces the quality risks associated with additional assembly steps.

[0009] In a preferred embodiment of the tensioner, a washer is provided between the ratchet and the locking member. The washer effectively prevents the locking member from causing excessive pressure or scratches on the ratchet surface during the locking process, ensuring the integrity of the ratchet teeth and making the distribution of locking force more uniform.

[0010] In a preferred embodiment of the tensioner, the limiting component includes limiting grooves corresponding to both sides of the lower clamp, with limiting plates slidably connected within the two limiting grooves. The limiting plates engage with the ratchet on both sides. A mounting pin is provided on the side of the limiting plate away from the ratchet, and a spring is fitted onto the mounting pin. An upright plate is provided on the lower clamp corresponding to the mounting pin, with a pin groove at one end. One end of the upright plate is inserted into the pin groove. The continuous restoring force provided by the spring ensures the automatic and timely engagement between the limiting plate and the ratchet. This structure allows the tape reel to lock instantly after tensioning, preventing reversal or loosening and ensuring the safety and reliability of the binding operation.

[0011] In a preferred embodiment of the tensioner, the stop assembly includes stop grooves corresponding to both sides of the upper bracket. A locking block protrudes from the center of each stop groove. A stop plate is slidably connected between the two stop grooves. The two sides of the stop plate engage with the ratchet. A limiting hole is provided at the center of the stop plate. A torsion spring is sleeved on the locking block, with one end of the torsion spring positioned within the limiting hole. The torque of the torsion spring provides a stable and reliable engagement force to the stop plate, allowing the operator to feel clearly during release operations, thus improving the convenience and safety of operation.

[0012] In a preferred embodiment of the tensioner, the upper bracket has a handle at the end away from the lower bracket. The handle is cylindrical and has a U-shaped groove on the side facing the belt shaft. This handle shape and size can accommodate the hand shape of most operators, improving grip comfort and stability.

[0013] Compared with the prior art, this application has the following beneficial technical effects:

[0014] 1. Simplified structure and reduced cost: The one-piece molded flange replaces the independent bushing parts, reducing the number of parts and simplifying the assembly process, thereby reducing material costs and assembly costs.

[0015] 2. Reduced wear and smoother operation: The inner wall of the flange provides a smooth support surface for the belt shaft, which significantly reduces the friction and wear between the belt shaft and the support hole, making the belt shaft rotate more smoothly when winding and unwinding the belt, and effectively avoiding jamming.

[0016] 3. Optimized stress distribution and extended lifespan: This integrated support structure distributes the stress on the rotating parts more evenly to the bracket, improving the rigidity and stability of the overall structure and helping to extend the service life of the tensioner. Attached Figure Description

[0017] Figure 1 This is a 3D view of the tensioner.

[0018] Figure 2 This is an exploded view of the tensioner structure.

[0019] Figure 3 This is a cross-sectional view of the tensioner at the belt shaft.

[0020] Figure 4 This is a structural diagram with a shaft.

[0021] Figure 5 This is a structural diagram of the lower card holder.

[0022] The following is an explanation of the reference numerals in the attached figures:

[0023] 10. Lower clamping bracket; 11. First shaft hole; 12. Flanged edge; 13. Restricting slide groove; 14. Restricting plate; 15. Mounting pin; 16. Spring; 17. Upright plate; 18. Pin groove;

[0024] 20. Upper bracket; 21. Second shaft hole; 22. Stop groove; 23. Stop plate; 24. Locking block; 25. Limiting hole; 26. Torsion spring; 27. Handle;

[0025] 30. Shaft; 31. Ratchet; 32. Locking element; 33. Washer. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] In the following embodiments, the same or similar reference numerals denote the same or similar components or components with 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.

[0028] In the description of this utility model, it should be understood that the terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] refer to Figures 1 to 5 This utility model provides a tensioner, including a lower bracket 10, an upper bracket 20 and a belt shaft 30.

[0030] The lower card holder 10 is provided with a limiting component, and first shaft holes 11 are provided on both sides of one end of the lower card holder 10. The upper card holder 20 is provided with a stop component, and second shaft holes 21 are provided on both sides of one end of the upper card holder 20. The lower card holder 10 is located inside the upper card holder 20, such that the two first shaft holes 11 are located between the two second shaft holes 21.

[0031] The two ends of the belt shaft 30 pass sequentially through the first shaft hole 11 and the second shaft hole 21 on corresponding sides, and a ratchet 31 is installed at the end of the belt shaft 30 that extends out of the second shaft hole 21. A locking member 32 is provided on the outside of the ratchet 31 to lock the lower bracket 10, the upper bracket 20 and the ratchet 31 together onto the belt shaft 30. One end of the limiting component and the stopping component can selectively engage or disengage from the ratchet 31 to achieve the tightening and releasing functions.

[0032] The key improvement of this utility model lies in the following: a flange 12 extending outward along the axial direction is provided at the first shaft hole 11, the inner wall of which forms a support surface that rotates with the outer peripheral surface of the belt shaft 30; the second shaft hole 21 is sleeved on the outside of the flange 12. This structure replaces the traditional independent bushing with an integrated flange 12, which not only simplifies the structure but also significantly reduces the friction and wear when the belt shaft 30 rotates.

[0033] Preferably, the axial length of the flange 12 is not greater than the depth of the second shaft hole 21, ensuring that it is completely accommodated within the second shaft hole 21, avoiding assembly interference, and ensuring a compact structure and reliable fit. The flange 12 and the lower bracket 10 adopt an integral molding structure, which enhances the overall structural strength, avoids the risk of loosening of separate parts, simplifies the production process, and improves processing efficiency and product quality consistency.

[0034] Furthermore, a washer 33 is provided between the ratchet 31 and the locking member 32. The washer 33 can effectively prevent pressure damage or scratches to the surface of the ratchet 31 during the locking process, ensuring the integrity of the ratchet 31 tooth surface, while making the locking force distribution more uniform and improving the structural reliability.

[0035] The limiting assembly includes limiting grooves 13 corresponding to both sides of the lower clamp 10. A limiting plate 14 is slidably connected within each limiting groove 13. Both sides of the limiting plate 14 engage with the ratchet 31. A mounting pin 15 is provided on the side of the limiting plate 14 away from the ratchet 31. A spring 16 is fitted onto the mounting pin 15. An upright plate 17 is provided on the lower clamp 10 corresponding to the mounting pin 15. One end of the upright plate 17 has a pin groove 18, and one end of the mounting pin 15 is inserted into the pin groove 18. The spring 16 provides a continuous restoring force, ensuring the automatic and timely engagement of the limiting plate 14 with the ratchet 31, allowing for instantaneous locking after tightening, effectively preventing reversal or loosening, and ensuring the safety of the binding operation.

[0036] The stop assembly includes stop grooves 22 corresponding to both sides of the upper bracket 20. A locking block 24 protrudes from the center of each stop groove 22. A stop plate 23 is slidably connected between the two stop grooves 22. The two sides of the stop plate 23 engage with the ratchet 31. A limiting hole 25 is provided at the center of the stop plate 23. A torsion spring 26 is sleeved on the locking block 24, with one end of the torsion spring 26 disposed within the limiting hole 25. The torque of the torsion spring 26 provides a stable and reliable reset engagement force to the stop plate 23, allowing the operator to have a clear feel during the release operation, thus improving the convenience and safety of the operation.

[0037] The upper card holder 20 is provided with a handle 27 at the end away from the lower card holder 10. The handle 27 is cylindrical. The shape and size of the handle 27 can fit the hand shape of most operators, which can effectively improve grip comfort and operation stability, and reduce fatigue during long-term use.

[0038] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A tensioner, comprising: The lower card holder (10) is provided with a limiting component, and the lower card holder (10) has first shaft holes (11) on both sides of one end; The upper card holder (20) is provided with a stop assembly. The upper card holder (20) has second shaft holes (21) on both sides of one end. The lower card holder (10) is located inside the upper card holder (20), so that the two first shaft holes (11) are located between the two second shaft holes (21). A belt shaft (30) has its two ends passing through the first shaft hole (11) and the second shaft hole (21) on the corresponding sides in sequence. A ratchet (31) is installed at the end of the belt shaft (30) that passes through the second shaft hole (21). A locking member (32) is provided on the outside of the ratchet (31) for locking the lower bracket (10), the upper bracket (20) and the ratchet (31) onto the belt shaft (30). One end of the limiting component and one end of the stopping component can engage and disengage with the ratchet (31). Its features are, A flange (12) extending outward along its axial direction is provided at the first shaft hole (11), and the inner wall of the flange (12) forms a support surface that rotates with the outer peripheral surface of the belt shaft (30); the second shaft hole (21) is sleeved on the flange (12).

2. A tensioner according to claim 1, characterized in that: The axial dimension of the flange (12) does not exceed the depth of the second shaft hole (21).

3. A tensioner according to claim 1, characterized in that: The flange (12) and the lower card holder (10) are integrally formed.

4. A tensioner according to claim 1, characterized in that: A washer (33) is provided between the ratchet (31) and the locking member (32).

5. A tensioner according to claim 1, characterized in that: The limiting component includes limiting grooves (13) corresponding to both sides of the lower card holder (10). A limiting plate (14) is slidably connected in the two limiting grooves (13). Both sides of the limiting plate (14) are engaged with the ratchet (31). A mounting pin (15) is provided on the side of the limiting plate (14) away from the ratchet (31). A spring (16) is sleeved on the mounting pin (15). An upright plate (17) is provided on the lower card holder (10) corresponding to the mounting pin (15). A pin groove (18) is provided at one end of the upright plate (17). One end of the mounting pin (15) is inserted into the pin groove (18).

6. A tensioner according to claim 1, characterized in that: The stop assembly includes stop grooves (22) corresponding to both sides of the upper bracket (20). A locking block (24) is protruding in the middle of the stop groove (22). A stop plate (23) is slidably connected in the two stop grooves (22). The two sides of the stop plate (23) are engaged with the ratchet (31). A limiting hole (25) is provided in the middle of the stop plate (23). A torsion spring (26) is sleeved on the locking block (24). One end of the torsion spring (26) is located in the limiting hole (25).

7. A tensioner according to claim 1, characterized in that: The upper card holder (20) has a handle (27) at one end away from the lower card holder (10), and the handle (27) is cylindrical.

Images