Tension adjustment structure and timing chain system having the same

Abstract

This invention provides a tension adjustment structure and a timing chain system having the same. The tension adjustment structure includes a fixed component mounted on the engine block; a limiting component movably mounted on the fixed component in a preset direction, the limiting component having a guide surface for contacting the chain; and an adjusting component deformably disposed between the fixed component and the limiting component, so that when the limiting component moves in the preset direction, the adjusting component deforms to adjust the chain tension. This solves the problem in the prior art where the chain tension cannot be dynamically adjusted when faced with fluctuations in engine load using traditional fixed guide rails.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and more specifically, to a tension adjustment structure and a timing chain system having the same. Background Technology

[0002] In the precise operation of an engine, the timing chain system plays a crucial role, responsible for accurately driving the valve train to achieve the timing of valve opening and closing. Traditional timing chain systems typically use a rigid, integral guide rail design, whose main function is to guide the chain along a predetermined path, preventing misalignment or tooth skipping during high-speed rotation. However, this rigid guide rail has certain limitations:

[0003] 1. Fixed Tension Issue: Traditional guide rails cannot adjust chain tension according to dynamic changes in engine operating conditions. When the engine load changes, the chain tension also fluctuates, and rigid guide rails cannot respond to this change, causing the chain to be too slack or too tight under certain operating conditions, thus affecting transmission efficiency and system reliability.

[0004] 2. Vibration and Noise: Uneven changes in chain tension can cause additional vibration and noise, especially under high engine loads or rapid speed changes. This vibration not only accelerates wear on the chain and related components but also affects the driving experience and overall noise control.

[0005] 3. Insufficient versatility: Traditional guide rail designs are often optimized for specific engine models, lacking flexibility and making it difficult to adapt to different engine models or displacements. This limits the interchangeability and production efficiency of guide rail components, increasing manufacturing and maintenance costs.

[0006] 4. Stress Concentration: Because traditional guide rails are too rigid, the stress at the contact point between the guide rail and the chain will increase significantly when the chain tension changes. Long-term operation may lead to material fatigue and structural damage. Utility Model Content

[0007] The main objective of this invention is to provide a tension adjustment structure and a timing chain system thereon, in order to solve the problem that the chain tension of a traditional fixed guide rail cannot be dynamically adjusted when faced with engine load fluctuations.

[0008] To achieve the above objectives, according to one aspect of the present invention, a tension adjustment structure is provided, comprising:

[0009] A mounting component for mounting on the engine block;

[0010] A limiting component is movably mounted on a fixed component in a preset direction. The limiting component has a guide surface for contacting the chain.

[0011] An adjusting component is deformably disposed between the fixed component and the limiting component, so that when the limiting component moves in a preset direction, the adjusting component deforms to adjust the tension of the chain.

[0012] Furthermore, the limiting component is provided with a limiting mounting groove, and at least a portion of the adjusting component is located within the limiting mounting groove.

[0013] Furthermore, the fixed component is provided with a fixed mounting groove, which corresponds to the limiting mounting groove, so as to jointly form an installation space for installing the adjustment component.

[0014] Furthermore, there are multiple limiting mounting slots, which are arranged at intervals along the first direction;

[0015] The fixed mounting slots are arranged at intervals along the first direction, and the fixed mounting slots are set to correspond one-to-one with the multiple limiting mounting slots. An installation space is formed between one of the limiting mounting slots and its corresponding fixed mounting slot.

[0016] There are multiple adjustment components, each located in its own installation space, with the first direction perpendicular to the preset direction.

[0017] Furthermore, a first protrusion is formed between two adjacent limiting mounting slots;

[0018] A second protrusion is formed between two adjacent mounting slots;

[0019] When the adjusting component is under the first preload, there is a space for movement on the side where the first protrusion and the second protrusion are close together. When the adjusting component is under the second preload, the side where the first protrusion and the second protrusion are close together comes into contact.

[0020] Furthermore, the fixing component is provided with a fixing guide, which is used to cooperate with the limiting component to make the limiting component move in a preset direction.

[0021] Furthermore, the limiting component is provided with a limiting guide, which is used in conjunction with the fixed guide to make the limiting component move in a preset direction.

[0022] Furthermore, the fixing guide portion is a guide protrusion, which is disposed on the two side walls of the fixing component arranged along the first direction; and / or,

[0023] The limiting guide is a limiting groove, and the limiting groove is set to correspond one-to-one with the fixed guide.

[0024] Furthermore, the fixing component is provided with a connecting part;

[0025] The tension adjustment structure also includes a locking component, which is movably disposed on the connecting part. The locking component and the connecting part are arranged in a one-to-one correspondence, so as to install the fixed component on the engine cylinder block through the locking component.

[0026] According to another aspect of the present invention, a timing chain system is provided, which has the above-described tension adjustment structure.

[0027] By applying the technical solution of this utility model, the limiting component can be movably set on the fixed component in a preset direction. Its range of motion and direction are strictly controlled, which can respond to the tension requirements of the chain without exceeding the necessary boundaries. The mobility of the limiting component allows it to move according to the changes in the chain tension, thereby effectively adjusting the chain tension and avoiding transmission failure or abnormal wear caused by chain slack.

[0028] The deformation capability of the adjusting component means that it can adapt to different states of chain tension. By deforming itself, it adjusts the relative position of the limiting component and the chain, thereby achieving the function of automatically tensioning the chain.

[0029] The arc-shaped design of the guide surface facilitates a smooth chain transition, reduces impact and friction when the chain contacts the limiting components, improves the smoothness of chain operation, and reduces noise.

[0030] When the chain is slack, the limiting component automatically applies tension to the chain with the help of the preload of the adjusting component. This not only compensates for the slack in an instant, but also ensures that the chain is always in the optimal tension state, improving the efficiency and reliability of the chain drive.

[0031] Through the precise movement of the limiting components, the chain changes from a slack state to a tensioned state. This means that the chain can effectively transmit power, avoiding failure or inefficiency of the transmission system.

[0032] The dynamic adjustment capability of the adjustment components ensures that the chain tension can be finely adjusted in real time according to actual operating conditions, avoiding the chain from being too loose or too tight, thereby reducing the vibration and noise of the timing chain system and extending the service life of the chain and related components. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0034] Figure 1 A cross-sectional view of the tension adjustment structure according to an embodiment of this application is shown;

[0035] Figure 2 A side view of a tension adjustment structure according to an embodiment of this application is shown.

[0036] The above figures include the following reference numerals:

[0037] 1. Fixing component; 101. Fixing mounting groove; 102. Second protrusion; 103. Fixing guide part; 104. Connecting part; 2. Limiting component; 201. Guide surface; 202. Limiting mounting groove; 203. First protrusion; 204. Limiting guide part; 3. Adjusting component. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] As mentioned in the background section, this application provides a tension adjustment structure to address the problem of the inability to dynamically adjust chain tension in conventional fixed guide rails when facing engine load fluctuations. The tension adjustment mechanism includes:

[0040] Fixed component 1, for mounting on the engine block;

[0041] The limiting component 2 is movably disposed on the fixed component 1 in a preset direction. The limiting component 2 has a guide surface 201, which is used to contact the chain.

[0042] Adjustment component 3 is deformably disposed between fixed component 1 and limiting component 2, so that when limiting component 2 moves in a preset direction, the tension of the chain is adjusted by the deformation of adjustment component 3.

[0043] Specifically, such as Figures 1 to 2As shown, the tension adjustment structure provided in this application includes a fixing component 1 mounted on the engine block, and a limiting component 2 movably mounted on the fixing component 1 in a preset direction. An adjusting component 3 is disposed between the fixing component 1 and the limiting component 2. The adjusting component 3 can deform in a preset direction. A guide surface 201, which is arc-shaped, is provided on the side of the limiting component 2 away from the fixing component 1 for contacting the chain. After the above structure is assembled, the adjusting component 3 has a first preload of 3N-5N. During use, because the adjusting component 3 has a first preload of 3N-5N... Therefore, when the chain becomes slack, the limiting component 2 moves away from the fixed component 1 under the pre-tension force of the adjusting component 3, so that the slack chain changes to a taut state, thereby enabling the timing chain system to work normally and preventing increased vibration and noise during operation. Because of the existence of the adjusting component 3, the chain can be adjusted in real time according to the degree of slack, so that the chain is always in a taut state. Furthermore, the limiting component 2 in this technical solution is made of polyamide composite material, and the adjusting component 3 is a spring in this embodiment.

[0044] The limiting component 2 can be movably mounted on the fixed component 1 in a preset direction. Its range of motion and direction are strictly controlled, so that it can respond to the tension requirements of the chain without exceeding the necessary boundaries. The mobility of the limiting component 2 allows it to move according to the changes in chain tension, thereby effectively adjusting the chain tension and avoiding transmission failure or abnormal wear caused by chain slack.

[0045] The deformability of the adjusting component 3 means that it can adapt to different states of chain tension and adjust the relative position of the limiting component 2 and the chain by deforming itself, thereby achieving the function of automatically tensioning the chain.

[0046] The arc design of the guide surface 201 facilitates a smooth transition of the chain, reduces the impact and friction when the chain contacts the limiting component 2, and improves the smoothness of chain operation and reduces noise.

[0047] The first preload (3N-5N) of the adjusting component 3 means that the chain can maintain proper tension even under cold start or low load conditions, avoiding vibration and noise caused by lack of chain tension, and also reducing the risk of timing deviation caused by chain slack.

[0048] When the chain is slack, the limiting component 2 automatically applies tension to the chain with the help of the preload of the adjusting component 3. This not only compensates for the slack of the chain in time, but also ensures that the chain is always in the best tension state, thereby improving the efficiency and reliability of the chain drive.

[0049] Through the precise movement of the limiting component 2, the chain changes from a slack state to a tensioned state. This means that the chain can effectively transmit power, avoiding failure or inefficiency of the transmission system.

[0050] The dynamic adjustment capability of the adjustment component 3 ensures that the chain tension can be finely adjusted in real time according to actual operating conditions, avoiding the chain from being too loose or too tight, thereby reducing the vibration and noise of the timing chain system and extending the service life of the chain and related components.

[0051] The use of polyamide composite material gives the limiting component 2 lightweight and high strength characteristics, while also having good wear resistance and self-lubrication. These characteristics together improve the durability and operating efficiency of the limiting component 2, and further reduce the noise and energy loss of the timing chain system during operation.

[0052] Furthermore, the limiting component 2 is provided with a limiting mounting groove 202, and at least a portion of the adjusting component 3 is located within the limiting mounting groove 202.

[0053] Furthermore, the fixing component 1 is provided with a fixing mounting groove 101, which corresponds to the limiting mounting groove 202 to jointly form an installation space for installing the adjusting component 3.

[0054] Furthermore, there are multiple limiting mounting slots 202, and the multiple limiting mounting slots 202 are arranged at intervals along the first direction;

[0055] The fixed mounting slot 101 has multiple slots, which are arranged at intervals along the first direction. The multiple fixed mounting slots 101 are configured to correspond one-to-one with the multiple limiting mounting slots 202. An installation space is formed between one of the limiting mounting slots 202 and its corresponding fixed mounting slot 101.

[0056] There are multiple adjustment components 3, each of which is located in a different installation space, with the first direction perpendicular to the preset direction.

[0057] Specifically, a limiting mounting groove 202 is provided on the limiting component 2. There are multiple limiting mounting grooves 202, and all the limiting mounting grooves 202 are arranged at intervals along a first direction, which is... Figure 1 In the vertical direction, a fixing mounting groove 101 is provided on the fixing component 1. There are multiple fixing mounting grooves 101, and all fixing mounting grooves 101 are arranged at intervals along the first direction. The number and position of fixing mounting grooves 101 correspond one-to-one with the number and position of limiting mounting grooves 202. An installation space is formed between each fixing mounting groove 101 and its corresponding limiting mounting groove 202. There are multiple adjusting components 3, and each adjusting component 3 is respectively set in an installation space, and the first direction is perpendicular to the preset direction.

[0058] The setting of the limiting mounting groove 202 provides multiple mounting positions for the adjusting component 3, allowing the chain tension to be finely adjusted within a wider range, thus improving the adaptability of the tension adjustment structure.

[0059] The arrangement of the limiting mounting grooves 202 along the first direction ensures the distribution of the adjusting components 3 at different heights, enabling the device to provide uniform tension when the chain floats up and down, reducing instability during chain operation.

[0060] The fixed mounting groove 101 is configured to provide the adjusting component 3 with a position that matches the limiting mounting groove 202 on the limiting component 2, so that the adjusting component 3 can be installed between the fixed component and the limiting component to form the basic framework of the tension adjusting structure.

[0061] The correspondence between the fixed mounting groove 101 and the limiting mounting groove 202 ensures that the position of the adjusting component 3 between the fixed component 1 and the limiting component 2 is accurate, enabling the adjusting component to transmit force efficiently and enhancing the controllability and consistency of the tension.

[0062] The mounting space formed by the fixed mounting slot 101 and the limiting mounting slot 202 of each combination provides the necessary clearance for the installation of the adjusting component 3, which not only ensures the stable installation of the adjusting component, but also gives the adjusting component a moderate degree of freedom, so that it can respond to changes in chain tension in a preset direction.

[0063] The inclusion of multiple adjustment components 3 enhances the uniform distribution of chain tension, ensuring consistent tension across all parts of the chain even with significant fluctuations in chain tension, thereby improving the stability and efficiency of the chain drive.

[0064] Furthermore, a first protrusion 203 is formed between two adjacent limiting mounting slots 202;

[0065] A second protrusion 102 is formed between two adjacent mounting slots 101;

[0066] When the adjusting component 3 is under the first preload, the side of the first protrusion 203 that is close to the second protrusion 102 forms a space for movement. When the adjusting component 3 is under the second preload, the side of the first protrusion 203 that is close to the second protrusion 102 comes into contact.

[0067] Specifically, a space is formed between the first protrusion 203 and the corresponding second protrusion 102. When the first preload of the adjusting component 3 is 3N-5N, the distance between the first protrusion 203 and the corresponding second protrusion 102 is 0.5mm, that is, the travel of the limiting component 2 is 0.5mm. When the adjusting component 3 is under the second preload, the side of the first protrusion 203 that is close to the second protrusion 102 comes into contact.

[0068] The movable space formed between the first protrusion 203 and the second protrusion 102 allows the limiting component 2 to move freely within a certain range. This ensures that the limiting component can respond to changes in chain tension and improves the adaptability of the chain drive system under different loads.

[0069] Under the action of the first preload (3N-5N) of the adjusting component 3, the distance between the limiting component 2 and the fixing component 1 is maintained at 0.5mm. This indicates that the adjusting component has provided sufficient preload to maintain the basic tension of the chain without additional tension, reducing the possibility of chain slack during cold starts.

[0070] The movement stroke (0.5mm) of the limiting component 2 is equal to the initial distance between the first protrusion 203 and the second protrusion 102. This indicates that the movement range of the limiting component is precisely controlled. When the chain tension increases, the limiting component can use its full stroke to cope without exceeding the design boundary, thus ensuring the reliability and stability of the system.

[0071] Under the second preload of the adjusting component 3, the contact between the first protrusion 203 and the second protrusion 102 indicates that the adjusting component has reached its maximum deformation state. At this time, the limiting component 2 completely compresses the adjusting component, which can ensure that the chain can still maintain appropriate tension after high load or long-term operation, and avoid transmission failure and noise caused by excessive slack of the chain.

[0072] In summary, by forming a movable space between the first protrusion 203 on the limiting component 2 and the second protrusion 102 on the fixing component 1, and by controlling the distance between the first protrusion 203 and the second protrusion 102 under different pre-tension states of the adjusting component 3, this technical solution achieves dynamic adjustment of the chain tension.

[0073] Furthermore, the fixing component 1 is provided with a fixing guide 103, which is used to cooperate with the limiting component 2 so that the limiting component 2 moves in a preset direction.

[0074] Furthermore, the limiting component 2 is provided with a limiting guide 204, which is used in conjunction with the fixed guide 103 to make the limiting component 2 move in a preset direction.

[0075] Furthermore, the fixed guide portion 103 is a guide protrusion, which is disposed on the two side walls of the fixed member 1 arranged along the first direction; and / or,

[0076] The limiting guide part 204 is a limiting groove, and the limiting groove is set to correspond one-to-one with the fixed guide part 103.

[0077] Specifically, such as Figure 1 and Figure 2 As shown, a fixing guide 103 is provided on the fixing component 1, and a limiting guide 204 is provided on the limiting component 2. The fixing guide 103 is a guide protrusion, and the limiting guide 204 is a limiting groove. The fixing guide 103 and the limiting guide 204 are slidably engaged. The fixing guide 103 can slide within the limiting guide 204 in a preset direction. The fixing guide 103 is provided on two sides of the fixing component 1 arranged in the first direction, and correspondingly, the limiting guide 204 is provided on two inner sidewalls of the limiting component 2 arranged in the first direction.

[0078] The fixed guide part 103 provides a precise sliding path for the limiting component 2, ensuring the stability and guidance of the limiting component 2 when sliding in a preset direction, avoiding unnecessary lateral deviation during movement, and improving the accuracy of the tension adjustment structure.

[0079] The limiting guide 204 acts as a limiting groove and forms a sliding fit with the fixed guide 103. This ensures the stability and positioning accuracy of the limiting component 2 when it moves on the fixed component 1. The design of the limiting groove reduces the frictional resistance during the movement process, making the movement of the limiting component smoother.

[0080] The sliding fit design of the guide protrusion and the limiting groove forms an effective motion guiding mechanism, ensuring that the limiting component 2 moves linearly in the preset direction when adjusting the chain tension without deviating. This improves the accuracy and efficiency of chain tension adjustment and reduces chain vibration and noise caused by poor movement.

[0081] The sliding capability of the fixed guide 103 within the limiting guide 204 indicates that the entire tension adjustment structure has the flexibility to automatically adjust with changes in chain tension. This design enables the tension adjustment structure to better adapt to the chain tension requirements under different working conditions, thereby improving the stability and reliability of the chain drive system.

[0082] The fixed guide 103 is set on the two sides of the fixed component 1 arranged along the first direction (vertical direction), which ensures the stable guidance of the limiting component 2 in the vertical direction. This not only increases the overall rigidity of the tension adjustment structure, but also avoids unnecessary vertical displacement of the limiting component 2 during the chain tension adjustment process, thereby reducing the instability of the chain during operation.

[0083] The limiting guide 204 is set on the two inner sidewalls of the limiting component 2 arranged along the first direction, forming a stable sliding connection with the fixed guide 103. This ensures that when the chain tension changes, the limiting component 2 can make precise linear movements in the vertical direction. This is beneficial for the uniform force on the adjusting component 3 when the chain tension is adjusted, avoiding uneven distribution of chain tension in the vertical direction, and improving the operating efficiency of the chain drive system and the service life of the chain.

[0084] Furthermore, the fixing component 1 is provided with a connecting part 104;

[0085] The tension adjustment structure also includes a locking component, which is movably disposed on the connecting part. The locking component and the connecting part 104 are disposed in a one-to-one correspondence, so as to install the fixing component 1 on the engine cylinder block by means of the locking component.

[0086] Specifically, such as Figure 1 As shown, the fixing component 1 is provided with two connecting parts 104. The connecting parts 104 are connecting holes opened on the fixing component 1. The tension adjustment structure also includes a locking component that works in conjunction with the connecting parts 104. The locking component and the connecting parts 104 are arranged in a one-to-one correspondence. Thus, by using the locking component and the two connecting parts 104 in conjunction, the fixing component 1 is fixed to the engine cylinder block. In this embodiment, the locking component can be a bolt.

[0087] The two connecting parts 104 on the fixed part 1 provide the necessary connection points for the locking part, ensuring the stable installation of the fixed part on the engine block. This dual-point connection design improves the torsional resistance of the fixed part 1, reduces the displacement or rotation that may be caused by changes in chain tension, and ensures the overall stability and reliability of the tension adjustment structure.

[0088] The connection part 104 is designed as a connection hole, which facilitates the insertion and fixing of the locking component. This design simplifies the complexity of the connection between the fixing component and the engine block, making the assembly and disassembly of the tension adjustment structure more convenient and faster, and improving the efficiency of maintenance and repair.

[0089] The use of the locking component and the connecting part 104 together allows the fixing component 1 to be firmly connected to the engine block. The selection of the locking component, such as the bolt here, ensures the strength and durability of the connection. Even under extreme engine operating conditions, the fixing component can be kept stable, avoiding chain tension adjustment failure or abnormal wear caused by loose connection.

[0090] According to another aspect of the embodiments of this application, a timing chain system is also provided, which has the above-described tension adjustment structure.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tension adjustment structure, characterized in that, include: A mounting component (1) is used to be mounted on the engine block; A limiting component (2) is movably disposed on the fixing component (1) in a preset direction. The limiting component (2) has a guide surface (201) for contacting the chain. Adjustment component (3) is deformably disposed between the fixing component (1) and the limiting component (2) so that when the limiting component (2) moves in the preset direction, the tension of the chain is adjusted by the deformation of the adjustment component (3).

2. The tension adjustment structure according to claim 1, characterized in that, The limiting component (2) is provided with a limiting mounting groove (202), and at least a portion of the adjusting component (3) is located within the limiting mounting groove (202).

3. The tension adjustment structure according to claim 2, characterized in that, The fixing component (1) is provided with a fixing mounting groove (101), which corresponds to the limiting mounting groove (202) to jointly form an installation space for installing the adjusting component (3).

4. The tension adjustment structure according to claim 3, characterized in that, The limiting mounting groove (202) is multiplied, and the multiplied limiting mounting grooves (202) are arranged at intervals along the first direction; The fixed mounting slot (101) has a plurality of slots, which are arranged at intervals along the first direction. The plurality of fixed mounting slots (101) are configured to correspond one-to-one with the plurality of limiting mounting slots (202). An installation space is formed between one of the limiting mounting slots (202) and the corresponding fixed mounting slot (101). There are multiple adjustment components (3), each of which is disposed in the respective installation space, and the first direction is perpendicular to the preset direction.

5. The tension adjustment structure according to claim 4, characterized in that, A first protrusion (203) is formed between two adjacent limiting mounting slots (202); A second protrusion (102) is formed between two adjacent mounting slots (101); When the adjusting component (3) is under the first preload, the first protrusion (203) and the second protrusion (102) have a space for movement on the side that is close to each other. When the adjusting component (3) is under the second preload, the first protrusion (203) and the second protrusion (102) are in contact on the side that is close to each other.

6. The tension adjustment structure according to claim 1, characterized in that, The fixing component (1) is provided with a fixing guide (103), which is used to cooperate with the limiting component (2) so that the limiting component (2) moves along the preset direction.

7. The tension adjustment structure according to claim 6, characterized in that, The limiting component (2) is provided with a limiting guide (204), which is used in conjunction with the fixed guide (103) to make the limiting component (2) move along the preset direction.

8. The tension adjustment structure according to claim 7, characterized in that, The fixed guide portion (103) is a guide protrusion, which is disposed on the two side walls of the fixed component (1) arranged along the first direction; and / or, The limiting guide part (204) is a limiting groove, and the limiting groove is set in a one-to-one correspondence with the fixed guide part (103).

9. The tension adjustment structure according to claim 1, characterized in that, The fixing component (1) is provided with a connecting part (104); The tension adjustment structure further includes a locking component, which is movably disposed on the connecting part. The locking component is disposed in a one-to-one correspondence with the connecting part (104) so ​​as to install the fixing component (1) on the engine cylinder block through the locking component.

10. A timing chain system, characterized in that, The timing chain system has the tension adjustment structure as described in any one of claims 1 to 9.

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