Tensioner and vehicle

Abstract

The utility model discloses a kind of tensioner and vehicle, it is related to tensioner technical field, the tensioner includes: tensioning arm, rotation setting;Belt pulley assembly is connected with the tensioning arm;Mounting shell is equipped with installation cavity and with the installation port of installation cavity communication, one end of the tensioning arm covers the installation port and is rotationally connected with the mounting shell;Elastic member, horizontal is set in the installation cavity, the elastic member connects the mounting shell and the tensioning arm to generate moment of force to the tensioning arm;And limiting structure, the limiting structure is located between the tensioning arm and the mounting shell to limit the rotation angle of the tensioning arm.The technical scheme of the utility model reduces the occupation of axial space.

Description

Technical Field

[0001] This utility model relates to the field of tensioner technology, and in particular to a tensioner and a vehicle. Background Technology

[0002] In modern automotive engines, the front-end drive system plays a crucial role, driving other components via belts. To ensure efficient and reliable power transmission, a moderate and stable belt tension needs to be maintained. The tensioner is a key component for achieving this function, continuously applying force to the tension arm and tension pulley through internal elastic elements, thereby automatically compensating for belt slack caused by elongation or vibration.

[0003] Currently, the tensioners widely used in the front-end gear train of engines are mostly torsion springs, which provide the core tensioning torque. The torsion spring is usually directly sleeved on the shaft of the tensioner, and the restoring torque generated by the torsional deformation provides the tensioning arm with the torque to tighten the belt.

[0004] However, as engine technology develops towards compactness, lightweighting, and high power density, the space layout at the front end of the engine has become extremely tight. Traditional torsion spring tensioners are relatively large in the axial direction, occupying more axial space, making it difficult to arrange other surrounding components and prone to interference; to some extent, they also limit the compactness of the overall engine design and are not conducive to achieving better engine miniaturization goals. Utility Model Content

[0005] The main objective of this invention is to provide a tensioner and a vehicle that aims to solve at least one of the aforementioned technical problems.

[0006] To achieve the above objectives, this utility model provides a tensioner, which includes: Tensioner arm, rotate setting; The pulley assembly is connected to the tensioning arm; The mounting housing has a mounting cavity and a mounting port communicating with the mounting cavity. One end of the tensioning arm covers the mounting port and is rotatably connected to the mounting housing. An elastic element, horizontally disposed in the mounting cavity, connects the mounting shell and the tensioning arm to generate a torque on the tensioning arm; and A limiting structure is provided between the tensioning arm and the mounting housing to limit the rotation angle of the tensioning arm.

[0007] In one embodiment, the limiting structure includes a first limiting protrusion and a second limiting protrusion. The first limiting protrusion protrudes from the surface of the tensioning arm facing the mounting housing, and the second limiting protrusion protrudes from the outer wall of the mounting housing. Two second limiting protrusions are spaced apart along the circumference of the mounting housing, and a limiting space is formed between the two second limiting protrusions. The first limiting protrusion is disposed in the limiting space.

[0008] In one embodiment, the tensioner further includes a force transmission structure, the elastic element includes a helical spring, the helical spring is horizontally disposed in the mounting cavity, the helical spring is arranged in an arc shape circumferentially along the rotation axis of the tensioning arm, and the force transmission structure is disposed between the mounting shell and the tensioning arm to compress the helical spring when the tensioning arm rotates.

[0009] In one embodiment, the force transmission structure includes a first stop and a second stop. The first stop protrudes from the mounting cavity, and the second stop protrudes from the surface of the tensioning arm facing the mounting shell and extends into the mounting cavity. The first stop and the second stop are circumferentially spaced along the rotation axis of the tensioning arm to form a compression space, and the helical spring is disposed in the compression space.

[0010] In one embodiment, the tensioner further includes a connecting shaft disposed in the mounting cavity, one end of the connecting shaft being fixedly connected to the tensioning arm, and the other end of the connecting shaft being rotatably connected to the mounting shell.

[0011] In one embodiment, the mounting housing is provided with a mounting hole communicating with the mounting cavity, and the end of the connecting shaft away from the tensioning arm extends to the mounting hole; The tensioning arm further includes a first damping element, which is rotatably disposed on the side of the mounting housing facing away from the tensioning arm, and is disposed on the outer periphery of the connecting shaft.

[0012] In one embodiment, the first damping member includes a connecting sleeve portion and an abutment portion. The sleeve portion is sleeved on the outer periphery of the connecting shaft, and the abutment portion abuts against the surface of the mounting housing facing away from the tensioning arm. The sleeve portion is provided with an expansion gap, which extends axially along the connecting shaft.

[0013] In one embodiment, the tensioner further includes a fixing washer rotatably disposed on the side of the mounting housing facing away from the tensioning arm. The connecting shaft is fixedly connected to the fixing washer. The fixing washer has a through hole, the inner wall of the through hole has a first plane, and the outer wall of the connecting shaft has a second plane. The first plane and the second plane abut against each other to make the connecting shaft and the fixing washer rotate synchronously; and / or, the side of the mounting housing facing away from the tensioning arm has a mounting groove, and the abutting part is disposed in the mounting groove.

[0014] In one embodiment, the tensioner further includes a second damping element and an elastic sheet. The second damping element is disposed in the mounting cavity and abuts against the tensioning arm. The elastic sheet is disposed on the side of the second damping element facing away from the tensioning arm. The second damping element includes a damping ring portion and a damping protrusion portion. The damping protrusion portion protrudes from the surface of the damping ring portion facing away from the tensioning arm. The elastic sheet is disposed circumferentially along the damping protrusion portion and is located on the side of the damping ring portion facing away from the tensioning arm.

[0015] To achieve the above objectives, this utility model provides a vehicle comprising an engine, a drive belt, and the aforementioned tensioner, wherein the engine is driven to connect with the drive belt, and the pulley assembly abuts against the drive belt.

[0016] The technical solution of this application, by setting an elastic element in the mounting cavity, enables the elastic element to continuously and stably generate the required torque when the belt rotates due to vibration or elongation during operation. This torque is then transmitted to the pulley assembly via a tensioning arm, thereby achieving reliable and automatic belt tensioning, effectively preventing belt slippage, and improving the smoothness and reliability of the entire transmission system. Furthermore, the elastic element in this application is horizontally positioned within the mounting cavity. This means the elastic element is laid flat along the circumference of the mounting cavity. Compared to traditional torsion spring solutions that require sufficient axial span, the solution in this application has a smaller axial installation dimension, effectively reducing the axial space occupied. This allows for better adaptation to compact engines and various mechanical transmission systems with strict axial space constraints, leaving more space for the arrangement of other surrounding components and effectively reducing the risk of assembly interference between components in confined spaces. Furthermore, the significant reduction in axial dimension makes it more suitable for scenarios with smaller axial installation dimensions, enabling its widespread application in various new hybrid and range-extended powertrains with limited space. This improves applicability and meets the miniaturization and integration design goals of the overall transmission system and even the powertrain. Moreover, the tensioning arm in this application is rotatably connected to the mounting housing, resulting in lower frictional resistance. This allows the tensioning arm to adjust its position more sensitively and automatically when the chain or belt tension changes, improving the system's response speed. Compared to the sliding connection between the tensioning arm and the housing via a sliding groove structure, this avoids lateral compression and wedging effects, improving the smoothness of the tensioning arm's movement. Additionally, after installation, one end of the tensioning arm can cover the mounting opening, eliminating the need for a separate housing cover, achieving dual functionality and saving on the number of components, further reducing the axial dimension. Furthermore, the limiting structure restricts the rotation angle of the tensioning arm, ensuring that the tension on the belt is within the required range, preventing the belt from being too loose or too tight. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an angle structure of an embodiment of the tensioner of this utility model; Figure 2 This is a schematic diagram of another angle of the tensioner embodiment of this utility model; Figure 3 This is a schematic diagram of an exploded view of an embodiment of the tensioner of this utility model; Figure 4 This is a schematic diagram of the exploded structure of another embodiment of the tensioner of this utility model; Figure 5 This is a cross-sectional structural diagram of an embodiment of the tensioner of this utility model; Figure 6 for Figure 4 A magnified schematic diagram of part A in the middle.

[0019] Explanation of icon numbers: 100. Tensioning arm; 200. Pulley assembly; 300. Mounting housing; 310. Mounting cavity; 320. Mounting hole; 330. Mounting groove; 400. Elastic element; 500. Force transmission structure; 510. First stop block; 520. Second stop block; 600. Elastic sheet; 710. First damping element; 711. Sleeve part; 712. Abutment part; 713. Expanding gap; 720. Second damping element; 721. Damping ring part; 722. Damping protrusion; 810. Fixing washer; 811. Through hole; 812. First plane; 820. Connecting shaft; 821. Second plane; 900. Limiting structure; 910. First limiting protrusion; 920. Second limiting protrusion.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] 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 embodiments of the present utility model.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, in the embodiments of this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the embodiments of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0025] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by the embodiments of this utility model.

[0026] Currently, the tensioners widely used in the front-end gear train of engines are mostly torsion springs, which provide the core tensioning torque. The torsion spring is usually directly sleeved on the shaft of the tensioner, and the restoring torque generated by the torsional deformation provides the tensioning arm with the torque to tighten the belt.

[0027] However, as engine technology develops towards compactness, lightweighting, and high power density, the space layout at the front end of the engine has become extremely tight. Traditional torsion spring tensioners have a large number of spring coils, a large axial height, and occupy a large axial space. Sufficient axial space needs to be reserved for the tensioner, making the layout of the front-end accessory gear train less compact. This makes it difficult to arrange other surrounding components and is prone to interference. To a certain extent, it also limits the compactness of the overall engine design and is not conducive to achieving the goal of better engine miniaturization.

[0028] In view of this, this application provides a tensioner and a vehicle. The elastic element 400 in this application is horizontally disposed in the mounting cavity 310. It can be understood that the elastic element 400 is laid flat along the circumference of the mounting cavity 310. Compared with the traditional torsion spring solution, which requires sufficient axial span, the axial installation size is smaller, which can effectively reduce the axial space occupation. It can be better adapted to compact engines and various mechanical transmission systems with strict axial space constraints, leaving more space for the arrangement of other surrounding components and effectively reducing the risk of assembly interference between components in a confined space. The tensioning arm 100 in this application is rotatably connected to the mounting shell 300. The frictional resistance is small, which allows the tensioning arm 100 to adjust its position more sensitively and automatically when the chain or belt tension changes. In addition, after installation, one end of the tensioning arm 100 can cover the mounting opening, eliminating the need for a separate shell cover, achieving two uses in one, saving the number of parts used, and further reducing the axial size.

[0029] To better understand the above technical solution, the following detailed explanation is provided in conjunction with the accompanying drawings.

[0030] like Figures 1 to 4 As shown, this utility model embodiment proposes a tensioner, which includes: The tension arm 100 is rotatable. This means that the tension arm 100 is fixedly connected to a connecting shaft 820, and the connecting shaft 820 is rotatable, allowing the tension arm 100 to rotate around the axis of the connecting shaft 820. Optionally, the tension arm 100 has a fixing hole, and one end of the connecting shaft 820 is fixed to the fixing hole with an interference fit, or it is fixed by a flat key; this is not limited here. The pulley assembly 200 is connected to the tensioning arm 100. It is understood that the pulley assembly 200 abuts against the belt and tensions the belt under the action of the elastic element 400. Optionally, the pulley assembly 200 can be fixedly connected to the tensioning arm 100 by bolts. The mounting housing 300 has a mounting cavity 310, and the tensioning arm 100 is rotatably connected to the mounting housing 300. It is understood that the mounting housing 300 is fixedly installed, and mounting ears can be provided circumferentially to fix the mounting housing 300 in a predetermined position. The mounting housing 300 has a mounting cavity 310 and a mounting opening communicating with the mounting cavity 310. The mounting cavity 310 can provide installation space for other components such as the elastic element 400. The tensioning arm 100 is rotatably mounted in the mounting opening and covers the mounting hole 320. The elastic element 400 is horizontally disposed in the mounting cavity 310. The elastic element 400 connects the mounting housing 300 and the tensioning arm 100 to generate torque on the tensioning arm 100. It can be understood that the elastic element 400 is laid flat along the circumference of the mounting cavity 310, making full use of the circumferential space of the mounting cavity 310, reducing the axial installation dimensions, and decreasing the overall axial height of the tensioner, thus facilitating the installation and arrangement of the tensioner in a smaller axial space; and A limiting structure 900 is provided between the tensioning arm 100 and the mounting housing 300 to limit the rotation angle of the tensioning arm 100. In this way, the rotation angle of the tensioning arm 100 can be limited to ensure that the tension of the belt is within the required range and to prevent the belt from being too loose or too tight.

[0031] In the technical solution adopted in this embodiment, by providing an elastic element 400 in the mounting cavity 310, when the belt rotates due to vibration or elongation during operation, the elastic element 400 can continuously and stably generate the required torque, and transmit the force to the pulley assembly 200 through the tensioning arm 100, thereby achieving reliable and automatic tensioning of the belt, effectively preventing belt slippage, and improving the working smoothness and reliability of the entire transmission system. Moreover, the elastic element 400 in this application is horizontally arranged in the mounting cavity 310. It can be understood that the elastic element 400 is laid flat along the circumference of the mounting cavity 310. Compared with the traditional torsion spring solution, which must reserve sufficient axial span, the axial installation size is smaller, which can effectively reduce the axial space occupation. It can be better adapted to compact engines and various mechanical transmission systems with strict axial space constraints, leaving more space for the arrangement of other surrounding components, and effectively reducing the risk of assembly interference between components in a confined space. Furthermore, the significant reduction in axial dimension makes it more suitable for scenarios with smaller axial installation dimensions, enabling its widespread application in various new hybrid and range-extended powertrains with limited space. This improves applicability and meets the miniaturization and integration design goals of the overall transmission system and even the powertrain. Moreover, the tension arm 100 in this application is rotatably connected to the mounting housing 300, resulting in lower frictional resistance. This allows the tension arm 100 to more sensitively and automatically adjust its position when the chain or belt tension changes, improving the system's response speed. Compared to the sliding connection between the tension arm 100 and the housing via a sliding groove structure, lateral compression and wedging effects are avoided, improving the smoothness of the tension arm 100's movement. Additionally, after installation, one end of the tension arm 100 can cover the mounting opening, eliminating the need for a separate housing cover, achieving dual functionality, reducing the number of components used, and further reducing the axial dimension. Furthermore, the limiting structure 900 can restrict the rotation angle of the tension arm 100, ensuring that the tension on the belt is limited to the required range, preventing the belt from being too loose or too tight.

[0032] In one embodiment of this application, reference is made to Figure 2 The limiting structure 900 includes a first limiting protrusion 910 and a second limiting protrusion 920. The first limiting protrusion 910 protrudes from the surface of the tensioning arm 100 facing the mounting housing 300, and the second limiting protrusion 920 protrudes from the outer wall of the mounting housing 300. Two second limiting protrusions 920 are spaced apart along the circumference of the mounting housing 300, forming a limiting space between the two second limiting protrusions 920. The first limiting protrusion 910 is disposed in the limiting space. It can be understood that the first limiting protrusion 910 is slidably disposed in the limiting space, meaning that during the rotation of the tensioning arm 100, the first limiting protrusion 910 can move between the two second limiting protrusions 920, with a maximum travel distance of abutting against the second limiting protrusion 920. The movement path of the first limiting part is restricted by the two second limiting protrusions 920, thereby limiting the rotation angle of the tensioning arm 100. In this application, the first limiting protrusion 910 and the second limiting protrusion 920 are positioned to utilize the unused space on the side of the tensioning arm 100 facing the mounting housing 300, and their axial protrusion height is not higher than the height of the mounting housing 300, thus not increasing the axial dimension.

[0033] In one embodiment of this application, the elastic element 400 includes a helical spring, which is horizontally disposed in the mounting cavity 310. Specifically, the helical spring has good linearity in its force-displacement characteristics, providing a continuous and stable tension force and improving the reliability of the tensioner. Moreover, the relatively regular shape of the helical spring facilitates its horizontal arrangement in the mounting cavity 310, thereby optimizing axial space occupation and achieving a compact overall structure. In addition, the helical spring has low cost, long fatigue life, and is easy to replace, which can improve the product's economy and maintenance convenience.

[0034] In one embodiment of this application, the helical spring is arranged in an arc shape circumferentially along the rotation axis of the tensioning arm 100. It is understood that the spring shaft of the helical spring is arc-shaped, i.e., the helical spring in this embodiment is configured as an arc-shaped helical spring. In this way, the arc-shaped helical spring can fully utilize the annular unused area around the connecting shaft 820 of the tensioning arm 100, achieving efficient integration within a limited radial and circumferential space. Furthermore, the overall profile of the arc-shaped helical spring matches the geometry of the mounting cavity 310, eliminating the need for additional radial expansion, thereby further reducing the overall axial and radial dimensions of the tensioner while maintaining a sufficient number of effective turns and stiffness.

[0035] In one embodiment of this application, reference is made to Figure 3The tensioner also includes a force transmission structure 500, which is disposed between the mounting housing 300 and the tensioning arm 100 to compress the coil spring when the tensioning arm 100 rotates. In this way, the torque of the coil spring can be transmitted to the tensioning arm 100 through the force transmission structure 500, thereby tensioning the belt. Furthermore, the force transmission structure 500, positioned between the mounting housing 300 and the tensioning arm 100, can fully utilize the unused space of the mounting cavity 310, further reducing the overall axial dimension of the tensioner.

[0036] In one embodiment of this application, reference is made to Figure 5 The force transmission structure 500 includes a first stop 510 and a second stop 520. The first stop 510 protrudes from the mounting cavity 310, and the second stop 520 protrudes from the surface of the tensioning arm 100 facing the mounting housing 300 and extends into the mounting cavity 310. The first stop 510 and the second stop 520 are circumferentially spaced along the rotation axis of the tensioning arm 100 to form a compression space, in which the helical spring is disposed. Thus, the first stop 510 abuts against one end of the helical spring, and the second stop 520 abuts against the other end of the helical spring, thereby clamping the helical spring and fixing it. Moreover, when the tensioning arm 100 rotates, the first stop 510 and the second stop 520 can compress the helical spring, causing it to deform. The torque of the helical spring can also be transmitted to the tensioning arm 100 through the cooperation of the first stop 510 and the second stop 520, thereby tensioning the belt of the pulley structure. Optionally, the first stop 510 is integrally formed with the mounting housing 300, and the second stop 520 is integrally formed with the tensioning arm 100.

[0037] In one embodiment of this application, reference is made to Figure 3 and Figure 4 The tensioner also includes a connecting shaft 820, which is located in the mounting cavity 310. One end of the connecting shaft 820 is fixedly connected to the tensioning arm 100, and the other end is rotatably connected to the mounting housing 300. This allows the tensioning arm 100 to be rotatably supported on the mounting housing 300, constraining the rotation of the tensioning arm 100 and improving the stability of the tensioning arm 100's swing around a preset axis. Optionally, the connecting shaft 820 can be integrally formed with the tensioning arm 100, or it can be assembled using welding, snap-fit, or keyed structures, etc., without limitation.

[0038] In one embodiment of this application, reference is made to Figure 4 The mounting housing 300 is provided with a mounting hole 320 communicating with the mounting cavity 310, and the end of the connecting shaft 820 away from the tensioning arm 100 extends to the mounting hole 320. Reference Figure 3 and Figure 5The tensioning arm 100 also includes a first damping element 710, which is rotatably disposed on the side of the mounting housing 300 facing away from the tensioning arm 100, and is disposed on the outer periphery of the connecting shaft 820.

[0039] Specifically, the mounting hole 320 is used to mount the connecting shaft 820. It can be understood that one end of the connecting shaft 820 extends into the mounting hole 320 and is rotatably connected to it. Additionally, a first damping element 710 is provided on the outer periphery of the connecting shaft 820. The first damping element 710 abuts against the inner wall of the mounting hole 320, thus providing damping force when the connecting shaft 820 rotates, reducing the rotation amplitude of the tension arm 100. The first damping element 710 can be a damping bushing, or multiple elements can be spaced apart along the circumference of the connecting shaft 820; no limitation is made here. Specifically, the material of the first damping element 710 can be rubber, polyurethane, or plastic.

[0040] In one embodiment of this application, reference is made to Figure 3 The first damping element 710 includes a connecting sleeve portion 711 and an abutment portion 712. The sleeve portion 711 is fitted onto the outer periphery of the connecting shaft 820, and the abutment portion 712 abuts against the surface of the mounting housing 300 opposite to the tension arm 100. It is understood that the first damping element 710 includes the sleeve portion 711 and the abutment portion 712. The sleeve portion 711 connects the inner wall of the mounting hole 320 and the connecting shaft 820, providing damping force when the connecting shaft 820 rotates. The abutment portion 712 abuts against the surface of the mounting housing 300 opposite to the tension arm 100, which can initially fix the connecting shaft 820 axially and prevent wear of the tension arm 100 caused by tilting of the connecting shaft 820. Optionally, the sleeve portion 711 and the abutment portion 712 are integrally formed, which can reduce assembly steps and simplify the process.

[0041] In one embodiment of this application, reference is made to Figure 4 and Figure 6 The sleeve portion 711 is provided with an expansion gap 713, which extends axially along the connecting shaft 820. Thus, when assembling the connecting shaft 820 and the sleeve portion 711, the expansion gap 713 expands radially under the pressure of the connecting shaft 820, facilitating the fitting of the sleeve portion 711 onto the outside of the connecting shaft 820. Optionally, multiple expansion gaps 713 may be provided at intervals along the circumference of the sleeve portion 711.

[0042] In one embodiment of this application, reference is made to Figures 3 to 5 The tensioner also includes a fixing washer 810, which is rotatably mounted on the side of the mounting housing 300 facing away from the tensioning arm 100. The connecting shaft 820 is fixedly connected to the fixing washer 810. In this way, the fixing washer 810 can compress the first damping element 710, improving the uniformity of axial force; it can also further prevent wear of the tensioning arm 100 caused by the tilting of the connecting shaft 820.

[0043] In one embodiment of this application, reference is made to Figure 4 The fixing washer 810 has a through hole 811, the inner wall of which has a first plane 812, and the outer wall of the connecting shaft 820 has a second plane 821. The first plane 812 and the second plane 821 abut against each other to make the connecting shaft 820 and the fixing washer 810 rotate synchronously. Thus, through the abutting cooperation of the first plane 812 and the second plane 821, the fixing washer 810 and the connecting shaft 820 can rotate synchronously, preventing wear between them due to relative rotation. Optionally, the connecting shaft 820 and the fixing washer 810 are fixed by riveting to achieve axial fixation of the connecting shaft 820.

[0044] In one embodiment of this application, reference is made to Figure 4 The mounting housing 300 has a mounting groove 330 on the side facing away from the tensioning arm 100, and the fixing gasket 810 and / or the abutment portion 712 are located in the mounting groove 330. In this way, the fixing gasket 810 and the abutment portion 712 can be hidden in the mounting groove 330, making the surface of the mounting housing 300 facing away from the tensioning arm 100 simpler and flatter, while reducing the overall axial height, facilitating close arrangement with other accessories in confined spaces, and further improving the system's integration and compactness. Optionally, the inner diameter of the mounting groove 330 is larger than the outer diameter of the fixing gasket 810, thus preventing the fixing gasket 810 from contacting and rubbing against the groove wall of the mounting groove 330 during rotation with the connecting shaft 820.

[0045] In one embodiment of this application, reference is made to Figure 3 The tensioner also includes a second damping element 720 and an elastic plate 600. The second damping element 720 is disposed in the mounting cavity 310 and abuts against the tensioning arm 100, while the elastic plate 600 is disposed on the side of the second damping element 720 facing away from the tensioning arm 100. Thus, the tensioning arm 100 can compress the elastic plate 600 through the second damping element 720. This generates damping force during the rotation of the tensioning arm 100, reducing its rotation amplitude. It also improves the uniformity of axial force distribution. Furthermore, the axial force on the second damping element 720 can react on the tensioning arm 100, preventing it from tilting and thus avoiding uneven wear. Optionally, the second damping element 720 can be annular, matching the shape of the elastic plate 600. Specifically, the material of the second damping element 720 can be rubber, polyurethane, or plastic.

[0046] In one embodiment of this application, reference is made to Figure 3The second damping member 720 includes a damping ring portion 721 and a damping protrusion 722. The damping protrusion 722 protrudes from the surface of the damping ring portion 721 facing away from the tension arm 100. The elastic piece 600 is disposed circumferentially along the damping protrusion 722 and is located on the side of the damping ring portion 721 facing away from the tension arm 100. In this way, the space enclosed by the damping ring portion 721 and the damping protrusion 722 can be used to limit the elastic piece 600 and prevent the elastic piece 600 from shifting.

[0047] To achieve the above objectives, this utility model provides a vehicle comprising an engine, a drive belt, and the tensioner described above. The engine is driven by the drive belt, and the pulley assembly abuts against the drive belt. Specifically, the specific structure of the tensioner is as described in the above embodiments. Since this vehicle adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0048] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model embodiments. Any equivalent structural transformations made under the technical concept of the present utility model using the description and drawings of the present utility model embodiments, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model embodiments.

Claims

1. A tensioner, characterized in that, The tensioner includes: Tensioner arm, rotate setting; The pulley assembly is connected to the tensioning arm; The mounting housing has a mounting cavity and a mounting port communicating with the mounting cavity. One end of the tensioning arm covers the mounting port and is rotatably connected to the mounting housing. An elastic element, horizontally disposed in the mounting cavity, connects the mounting shell and the tensioning arm to generate a torque on the tensioning arm; and A limiting structure is provided between the tensioning arm and the mounting housing to limit the rotation angle of the tensioning arm.

2. The tensioner as described in claim 1, characterized in that, The limiting structure includes a first limiting protrusion and a second limiting protrusion. The first limiting protrusion protrudes from the surface of the tensioning arm facing the mounting shell, and the second limiting protrusion protrudes from the outer wall of the mounting shell. Two second limiting protrusions are spaced apart along the circumference of the mounting shell, and a limiting space is formed between the two second limiting protrusions. The first limiting protrusion is located in the limiting space.

3. The tensioner as described in claim 1, characterized in that, The tensioner further includes a force transmission structure, and the elastic element includes a helical spring. The helical spring is horizontally disposed in the mounting cavity and is arranged in an arc shape along the circumference of the rotation axis of the tensioning arm. The force transmission structure is disposed between the mounting shell and the tensioning arm to compress the helical spring when the tensioning arm rotates.

4. The tensioner as described in claim 3, characterized in that, The force transmission structure includes a first stop and a second stop. The first stop protrudes from the mounting cavity, and the second stop protrudes from the surface of the tensioning arm facing the mounting shell and extends into the mounting cavity. The first stop and the second stop are circumferentially spaced along the rotation axis of the tensioning arm to form a compression space, and the helical spring is disposed in the compression space.

5. The tensioner as claimed in claim 1, characterized in that, The tensioner also includes a connecting shaft, which is located in the mounting cavity. One end of the connecting shaft is fixedly connected to the tensioning arm, and the other end of the connecting shaft is rotatably connected to the mounting shell.

6. The tensioner as described in claim 5, characterized in that, The mounting housing is provided with a mounting hole communicating with the mounting cavity, and the end of the connecting shaft away from the tensioning arm extends to the mounting hole; The tensioning arm further includes a first damping element, which is rotatably disposed on the side of the mounting housing facing away from the tensioning arm, and is disposed on the outer periphery of the connecting shaft.

7. The tensioner as described in claim 6, characterized in that, The first damping member includes a connecting sleeve portion and an abutment portion. The sleeve portion is sleeved on the outer periphery of the connecting shaft, and the abutment portion abuts against the surface of the mounting housing facing away from the tensioning arm. The sleeve portion is provided with an expansion gap, which extends axially along the connecting shaft.

8. The tensioner as claimed in claim 7, characterized in that, The tensioner further includes a fixing washer, which is rotatably disposed on the side of the mounting housing facing away from the tensioning arm. The connecting shaft is fixedly connected to the fixing washer. The fixing washer has a through hole, the inner wall of the through hole has a first plane, and the outer wall of the connecting shaft has a second plane. The first plane and the second plane abut against each other to make the connecting shaft and the fixing washer rotate synchronously. And / or, the mounting housing has a mounting groove on the side facing away from the tensioning arm, and the abutment portion is located in the mounting groove.

9. The tensioner as claimed in claim 1, characterized in that, The tensioner further includes a second damping element and an elastic plate. The second damping element is disposed in the mounting cavity and abuts against the tensioning arm. The elastic plate is disposed on the side of the second damping element facing away from the tensioning arm. The second damping member includes a damping ring portion and a damping protrusion portion. The damping protrusion portion protrudes from the surface of the damping ring portion facing away from the tensioning arm. The elastic sheet is arranged circumferentially along the damping protrusion portion and is located on the side of the damping ring portion facing away from the tensioning arm.

10. A vehicle, characterized in that, The vehicle includes an engine, a drive belt, and a tensioner as described in any one of claims 1 to 9, wherein the engine is driven to the drive belt, and the pulley assembly abuts against the drive belt.

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