Maintenance-free spring type tensioner

Abstract

The utility model relates to the related technical field of tensioners, in particular to a maintenance-free spring type tensioner which comprises a supporting seat, a tensioning seat, an adjusting assembly, a connecting shaft and a tensioning wheel. According to the maintenance-free spring type tensioner, the tensioning seat is supported through the adjusting assembly, the position of the tensioning wheel is adjusted, proper tensioning force can be kept between the tensioning wheel and the chain wheel, the chain is prevented from loosening or being excessively tensioned, the effect of automatically adjusting the tensioning force is achieved, and stable operation of a mechanical system is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of tensioners, and in particular to a maintenance-free spring-type tensioner. Background Technology

[0002] Spring tensioners are commonly found in timing belt systems of automotive engines, various conveyors, agricultural machinery, and other applications requiring belt or chain drives. They are an ideal choice for environments demanding high reliability and low maintenance. The core of a spring tensioner lies in its internal spring mechanism. When installed in a drivetrain, the spring applies a constant force to the pulleys or guides in contact with the belt or chain, maintaining proper tension. As the belt or chain wears and stretches, the spring contracts or extends accordingly to maintain the required tension level. Therefore, efficient system operation is ensured even after prolonged use.

[0003] The spring mechanism in the existing technology does not have flexible adjustment capability and cannot be customized according to the specific tension requirements of the sprocket. This results in low compatibility between the tensioner and the sprocket, affecting the long-term efficiency and reliability of the system. Utility Model Content

[0004] This invention solves the problems in related technologies and proposes a maintenance-free spring-type tensioner. The clamping component facilitates the fixing of the end of the forming tube, the driving component drives the forming wheel to rotate, and the feeding unit feeds the forming tube, effectively ensuring the efficiency of bending the tube. In addition, the feeding unit achieves the purpose of automatic feeding of the bending tube through a compact mechanical structure, avoiding the use of electrical equipment and saving resources.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a maintenance-free spring tensioner, including a support base, a tensioning seat disposed on the upper end face of the support base, an adjustment component disposed between the tensioning seat and the support base, a connecting shaft connected to the tensioning seat, and a tensioning wheel connected to the connecting shaft.

[0006] By adopting the above technical solution, the tensioning seat is supported by the adjustment component and the position of the tensioning wheel is adjusted, so that the tensioning wheel and the sprocket can maintain an appropriate tension, avoiding the chain from becoming loose or over-tensioned, thereby achieving the effect of automatically adjusting the tension and ensuring the smooth operation of the mechanical system.

[0007] As a preferred embodiment, the tensioning wheel is provided with a tensioning groove, which is arranged circumferentially with the center of the tensioning wheel as the center point.

[0008] By adopting the above technical solution, the tensioning groove is used to limit the sprocket's position, ensuring that it will not slip off the tensioning wheel during tensioning operations. The tensioning groove design provides sufficient restraining force to ensure that the sprocket is securely fastened to the tensioning wheel.

[0009] As a preferred embodiment, a sealed bearing is provided at the connection between the tensioning wheel and the connecting shaft, and the other end of the connecting shaft is fixedly connected to the tensioning seat.

[0010] By adopting the above technical solution, a sealed bearing is installed at the connection between the tensioning wheel and the connecting shaft, ensuring that wear and friction are effectively reduced and service life is improved when the tensioning wheel rotates. One end of the connecting shaft is connected to the tensioning wheel through the sealed bearing, and the other end is fixed to the tensioning seat, allowing the tensioning wheel to rotate around the connecting shaft.

[0011] As a preferred embodiment, the adjustment assembly includes a tension rod that is fixedly disposed on both sides of the tensioning seat and slidably connected to the support seat, a support rod that is slidably connected to the support seat and coaxially disposed with the tension rod, an elastic member disposed between the support rod and the tension rod, an adjustment bolt disposed on the end of the support rod away from the end connected to the tension rod, an adjustment hole disposed on the support rod that is adapted to the adjustment bolt, and a guide assembly for guiding the support rod.

[0012] By adopting the above technical solution, the elastic component is set between the support rod and the tensioning rod, providing the necessary tension force to ensure that the tensioning wheel can effectively tension the chain; the adjusting bolt is positioned on the support rod through the adjusting hole, changing the distance between the support rod and the tensioning rod, thereby adjusting the supporting force of the elastic component; the guide assembly is used to ensure that the support rod maintains linear movement during the adjustment process, preventing uneven tension caused by skewness.

[0013] As a preferred embodiment, the adjusting bolt passes through the adjusting hole on the support rod and is connected to the adjusting hole, which is set in the height direction of the support rod.

[0014] By adopting the above technical solution, the support rod is used to support the elastic component, and its height can be adjusted by adjusting bolts. The adjusting bolts pass through the adjusting holes on the support base and are connected to the support rod, and their up and down movement can be achieved by rotation. Each adjusting hole is located in the height direction of the support rod, which facilitates the adjustment of the support rod's height.

[0015] As a preferred embodiment, the elastic member includes a support column head fixedly disposed on the support rod relative to the tension rod, and a tension spring disposed between the limit retaining ring and the support column head, with the limit retaining ring fixedly disposed at one end of the tension rod relative to the support rod. The limit retaining ring is slidably connected to the support seat, one end of the tension spring is fixedly connected to the limit retaining ring, and the other end of the tension spring is fixedly connected to the support column head.

[0016] By adopting the above technical solution, one end of the tension spring is fixed to the limiting retaining ring, and the other end is fixed to the support column head, providing a restoring tension so that the tension rod and the support rod maintain appropriate tension and avoid loosening between them; the sprocket may become loose during operation, at which time the tension of the tension spring can automatically adjust the tension between the support rod and the tension rod, effectively compensating for the impact of loosening and reducing the maintenance frequency.

[0017] As a preferred embodiment, the guide assembly includes guide blocks fixedly disposed on the outer periphery of the support rod and guide grooves disposed on the support base and adapted to the guide blocks, the guide grooves being disposed in the height direction of the support base.

[0018] By adopting the above technical solution, the guide block is fixedly mounted on the outer circumference of the support rod, and its function is to guide the support rod to maintain straightness during up-and-down movement and avoid deviation. The guide groove is fixedly mounted on the support base and is adapted to the guide block. Its function is to provide guidance and limit the movement of the support rod during up-and-down movement, ensuring that the support rod moves in the specified direction.

[0019] Compared with the prior art, the beneficial effects of this utility model are: This utility model;

[0020] 1. The support base is used to provide a stable support foundation and ensure the stability of the entire device;

[0021] 2. The tensioning seat is located on the upper surface of the support base and is used to install the tensioning wheel, providing it with an installation position;

[0022] 3. The adjusting component is located between the tensioning seat and the support seat, allowing adjustment of the tensioning seat's position. This changes the tension between the tensioning wheel and the sprocket, ensuring the tensioning wheel is tightly fitted to the sprocket for effective power transmission. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the maintenance-free spring tensioner of this utility model.

[0024] Figure 2 This is a partial half-sectional view of the support base in the maintenance-free spring tensioner of this utility model.

[0025] Figure 3This utility model relates to a maintenance-free spring-type tensioner. Figure 2 A structural schematic diagram of the front view;

[0026] Figure 4 This utility model relates to a maintenance-free spring-type tensioner. Figure 2 A structural schematic diagram of the enlarged view at point A;

[0027] Figure 5 This is a structural schematic diagram of the support rod and adjusting bolt assembly in the maintenance-free spring tensioner of this utility model.

[0028] In the picture:

[0029] 1. Support base; 10. Guide groove; 2. Tensioning seat; 21. Connecting shaft; 3. Tensioning wheel; 41. Tensioning rod; 411. Limiting retaining ring; 42. Support rod; 421. Support column head; 422. Guide block; 5. Adjusting bolt; 51. Adjusting hole; 6. Tensioning spring. Detailed Implementation

[0030] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0033] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship 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. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0034] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0035] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0036] like Figures 1 to 5 As shown, a maintenance-free spring-type tensioner includes a support base 1, a tensioning seat 2 disposed on the upper surface of the support base 1, an adjustment component disposed between the tensioning seat 2 and the support base 1, a connecting shaft 21 connected to the tensioning seat 2, and a tensioning wheel 3 connected to the connecting shaft 21. In this invention, by adjusting the tensioning seat 2 and adjusting the position of the tensioning wheel 3 through the adjustment component, an appropriate tension can be maintained between the tensioning wheel 3 and the sprocket, preventing the chain from becoming loose or over-tensioned, thereby achieving the effect of automatically adjusting the tension and ensuring the smooth operation of the mechanical system.

[0037] Please refer to the details. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The tensioning pulley 3 is equipped with a tensioning groove, which is circumferentially arranged with the center of the tensioning pulley as the center point. The tensioning groove is used to limit the position of the sprocket, ensuring that the sprocket will not slip off the tensioning pulley 3 during tensioning operations. The design of the tensioning groove provides sufficient restraining force to ensure that the sprocket is securely fastened to the tensioning pulley 3. That is, when it is necessary to adjust the chain tension, the chain first passes around the sprocket, and then the tensioning groove on the tensioning pulley 3 appropriately limits the sprocket. In this way, the tensioning process is not only more accurate, but also prevents the sprocket from accidentally disengaging from the tensioning pulley 3 during operation, thereby improving the reliability and safety of the equipment.

[0038] Please refer to the details. Figure 2 , Figure 3 , Figure 4 and Figure 5 A sealed bearing is installed at the connection between the tensioning wheel 3 and the connecting shaft 21. The other end of the connecting shaft 21 is fixedly connected to the tensioning seat 2. The sealed bearing is installed at the connection between the tensioning wheel 3 and the connecting shaft 21 to effectively reduce wear and friction and improve service life when the tensioning wheel 3 rotates. One end of the connecting shaft 21 is connected to the tensioning wheel 3 through the sealed bearing, and the other end is fixed to the tensioning seat 2, so that the tensioning wheel 3 can rotate around the connecting shaft 21.

[0039] Please refer to the details. Figure 2 , Figure 3 , Figure 4 and Figure 5The adjustment assembly includes a tensioning rod 41 fixedly disposed on both sides of the tensioning seat 2 and slidably connected to the support seat 1; a support rod 42 slidably connected to the support seat 1 and coaxially disposed with the tensioning rod 41; an elastic member disposed between the support rod 42 and the tensioning rod 41; an adjusting bolt 5 disposed at the end of the support rod 42 away from the end connected to the tensioning rod 41; an adjusting hole 51 disposed on the support rod 42 and adapted to the adjusting bolt 5; and a guide assembly for guiding the support rod 42. The elastic member disposed between the support rod 42 and the tensioning rod 41 provides the necessary tension force to ensure that the tensioning wheel 3 can effectively tension the chain. The adjusting bolt 5 is positioned on the support rod 42 through the adjusting hole 51 to change the distance between the support rod 42 and the tensioning rod 41, thereby adjusting the supporting force of the elastic member. The guide assembly is used to ensure that the support rod 42 maintains linear movement during adjustment and prevents uneven tension caused by skewness. Its working principle is as follows: by rotating the adjusting bolt 5, the distance between the support rod 42 and the tensioning rod 41 is changed, thereby adjusting the preload of the elastic component, so that the tensioning wheel 3 can automatically adjust the tension according to the tightness of the chain, thereby realizing the automatic tensioning of the chain.

[0040] Please refer to the details. Figure 5 An adjusting bolt 5 passes through an adjusting hole 51 on the support base 1 and connects to the support rod 42. The adjusting hole 51 is positioned along the height of the support rod 42. The support rod 42 supports the elastic component and its height is adjusted via the adjusting bolt 5. The adjusting bolt 5 passes through the adjusting hole 51 on the support base 1 and connects to the support rod 42; its vertical movement can be achieved by rotation. Each adjusting hole 51 is located along the height of the support rod 42, facilitating height adjustment. When the adjusting bolt 5 is rotated, due to the complementary interaction between the adjusting bolt 5 and the adjusting hole 51, the support rod 42 can move horizontally and vertically around the adjusting bolt 5, thereby achieving precise adjustment of the tension of the elastic component.

[0041] Please refer to the details. Figure 2 , Figure 3 and Figure 4The elastic component includes a support column head 421 fixedly disposed on the support rod 42 relative to the tension rod 41, a limiting ring 411 fixedly disposed on one end of the tension rod 41 relative to the support rod 42, and a tension spring 6 disposed between the limiting ring 411 and the support column head 421. The limiting ring 411 is slidably connected to the support base 1. One end of the tension spring 6 is fixedly connected to the limiting ring 411, and the other end of the tension spring 6 is fixedly connected to the support column head 421. The tension spring 6 provides a restoring tension, so that the tension rod 41 and the support rod 42 maintain appropriate tension and avoid loosening between them. The sprocket may become loose during operation. At this time, the tension of the tension spring 6 can automatically adjust the tension between the support rod 42 and the tension rod 41, effectively compensating for the impact of loosening and reducing the maintenance frequency. The overall working principle is as follows: the tension between the support rod 42 and the tension rod 41 is maintained by the elastic force of the tension spring 6. When the sprocket loosens and the distance between the two increases, the restoring force of the tension spring 6 will cause the two to reset, thereby automatically adjusting the tension and ensuring the stability and reliability of the system.

[0042] Please refer to the details. Figure 3 and Figure 4 The guiding assembly includes guide blocks 422 fixedly disposed on the outer periphery of the support rod 42 and guide grooves 10 disposed on the support base 1 and adapted to the guide blocks 422. The guide grooves 10 are arranged along the height direction of the support base 1. The guide blocks 422 are fixedly disposed on the outer periphery of the support rod 42, and their function is to guide the support rod 42 to maintain straightness during up-and-down movement and avoid deviation. The guide grooves 10 are fixedly disposed on the support base 1 and adapted to the guide blocks 422. Their function is to provide guidance and limit the up-and-down movement of the support rod 42, ensuring that the support rod 42 moves in the specified direction. The working principle is as follows: when the height of the support rod 42 is adjusted by adjusting the bolts 5, the support rod 42 will move up and down along the guide grooves 10. The guide blocks 422 and the guide grooves 10 cooperate with each other, making the movement of the support rod 42 more stable and precise, effectively preventing the support rod 42 from shaking or deviating during movement, and ensuring the stability of the overall structure and safety of use.

[0043] In this embodiment, when the adjusting bolt 5 is rotated, due to the complementary effect between the adjusting bolt 5 and the adjusting hole 51, the support rod 42 can move up and down horizontally around the adjusting bolt 5, changing the distance between the support rod 42 and the tension rod 41, thereby adjusting the preload of the elastic component, so that the tension wheel 3 can automatically adjust the tension according to the tightness of the chain.

[0044] The working principle of the elastic component is as follows: the tension between the support rod 42 and the tension rod 41 is maintained by the elastic force of the tension spring 6. When the sprocket loosens and the distance between the two increases, the restoring force of the tension spring 6 will cause the two to reset, thereby automatically adjusting the tension and ensuring the stability and reliability of the system.

[0045] The above are preferred embodiments of this utility model. Those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above. Any obvious improvements, substitutions or modifications made by those skilled in the art based on this utility model shall fall within the protection scope of this utility model.

Claims

1. A maintenance-free spring-type tensioner characterized by: The utility model provides a kind of tensioning device, including support seat (1), the tensioning seat (2) of setting in the upper end surface of the support seat (1), the adjusting assembly of setting between the tensioning seat (2) and the support seat (1), the connecting shaft (21) connected with the tensioning seat (2) and the tensioning wheel (3) connected with the connecting shaft (21).

2. A maintenance-free spring-type tensioner as in claim 1, wherein: The tensioning wheel (3) is provided with a tensioning groove, which is circumferentially arranged with the center of the tensioning wheel as the center point.

3. A maintenance-free spring-type tensioner as set forth in claim 2, wherein: The tensioning wheel (3) is provided with a sealing bearing at the connection with the connecting shaft (21), and the other end of the connecting shaft (21) is fixedly connected with the tensioning seat (2).

4. A maintenance-free spring-type tensioner as in claim 3, wherein: The adjusting assembly includes tensioning rods (41) fixedly arranged on both sides of the tensioning seat (2) and slidingly connected with the support seat (1), support rods (42) slidingly connected with the support seat (1) and coaxially arranged with the tensioning rods (41), elastic members arranged between the support rods (42) and the tensioning rods (41), adjusting bolts (5) arranged on the support rods (42) away from one end connected with the tensioning rods (41), adjusting holes (51) arranged on the support rods (42) and matched with the adjusting bolts (5), and guiding assemblies for guiding the support rods (42).

5. A maintenance-free spring-type tensioner as in claim 4, wherein: The adjusting bolt (5) is connected through the adjusting hole (51) of the support seat (1) on the support rod (42), and the adjusting hole (51) is arranged in the height direction of the support rod (42).

6. A maintenance-free spring-type tensioner as set forth in claim 5, wherein: The elastic member includes support studs (421) fixedly arranged on the support rods (42) relative to the tensioning rods (41), limit stop rings (411) fixedly arranged on one end of the tensioning rods (41) relative to the support rods (42), tensioning springs (6) arranged between the limit stop rings (411) and the support studs (421), and the limit stop rings (411) are slidingly connected with the support seat (1).

7. A maintenance-free spring-type tensioner as in claim 6, wherein: One end of the tensioning spring (6) is fixedly connected with the limit stop ring (411), and the other end of the tensioning spring (6) is fixedly connected with the support stud (421).

8. A maintenance-free spring-type tensioner as in claim 7, wherein: The guiding assembly includes guiding blocks (422) fixedly arranged on the outer periphery of the support rods (42) and guiding grooves (10) arranged on the support seat (1) and matched with the guiding blocks (422), and the guiding grooves (10) are arranged in the height direction of the support seat (1).

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