Air spring rotation stopping structure

Abstract

The utility model provides a kind of air spring rotation-stopping structure, including shock absorber oil storage bucket, rotation-stopping ring, sealing ring and piston, rotation-stopping ring is sleeved in the outside of shock absorber oil storage bucket, multiple deformation grooves are uniformly staggered and set on it along circumference, can realize deformation contraction;Piston is installed in the outside of rotation-stopping ring, when piston compacts rotation-stopping ring, so that rotation-stopping ring deforms and contracts and holds tightly shock absorber oil storage bucket, realize the close cooperation of three, relative rotation of air spring and shock absorber is prevented by friction torque;Sealing ring is set on oil storage bucket and is installed in the end face of rotation-stopping ring, for realizing the sealing of air spring structure. The friction torque between the rotation-stopping ring after compaction and oil storage bucket, piston inhibits relative rotation, realizes high-strength rotation-stopping, the deformation produced by interference assembly is absorbed to the greatest extent by the setting of deformation groove, deformation adaptability is good, can adapt to different fit tolerance, overall structure is simple, installation is convenient, and good portability.

Description

Technical Field

[0001] This utility model belongs to the field of air spring technology, specifically relating to an air spring anti-rotation structure. Background Technology

[0002] As the automotive industry continues to demand higher levels of driving comfort, air springs (hereinafter referred to as "air springs") have gradually become a core component of mid-to-high-end passenger vehicles due to their excellent damping performance and load adaptability. During vehicle operation, the air spring and shock absorber are assembled to form the air spring-shock absorber strut assembly, whose lower end is directly connected to the shock absorber, bearing the crucial role of supporting the vehicle's weight and transmitting vertical and lateral loads. However, due to the dynamic motion characteristics of the suspension system, relative rotation between the air spring and the shock absorber is inevitable, especially under cornering or bumpy conditions.

[0003] The existing structure relies on the supporting frictional torque between the air spring and the shock absorber to suppress relative rotation. However, in practical applications, there is a defect of insufficient frictional torque. When the load on the air spring increases with the vehicle model or road conditions, the frictional torque is not enough to completely prevent relative rotation, resulting in sliding friction noise between the piston and the shock absorber spring seat, which seriously affects the vehicle's NVH (noise, vibration, and harshness) performance. In addition, the structure has poor adaptability and cannot effectively match different size combinations. It is easy to cause the seal ring to be misaligned due to uneven deformation, which reduces the sealing reliability. Furthermore, the use of an integral thick-walled design to improve the connection strength will also lead to an increase in weight, making it difficult to meet the requirements of lightweighting. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a spring anti-rotation structure that can effectively ensure the anti-rotation torque and sealing performance of the spring during operation, better adapt to the different matching dimensions of the spring body and the shock absorber, has good structural adaptability, is easy to install, and achieves overall lightweight structure.

[0005] To achieve the above and other related objectives, this utility model provides a spring anti-rotation structure, comprising:

[0006] Shock absorber oil reservoir;

[0007] An anti-rotation ring, which is a straight cylindrical structure, is sleeved on the outside of the oil reservoir of the shock absorber, and has multiple deformation grooves along the circumferential direction on the anti-rotation ring.

[0008] A piston is installed on the outside of the anti-rotation ring. The piston presses the anti-rotation ring so that the anti-rotation ring deforms and contracts to grip the damper oil reservoir.

[0009] In an optional embodiment of this utility model, the anti-rotation ring includes a first end face and a second end face that are parallel to each other. The first end face is mounted on the same plane as the spring disc end face of the shock absorber oil tank and the end face of the piston. The second end face is connected to a sealing ring to seal the shock absorber oil tank and the piston.

[0010] In an optional embodiment of this utility model, the inner diameter of the anti-rotation ring is clearance-fitted with the outer diameter of the oil storage tank, and the outer diameter of the anti-rotation ring is interference-fitted with the inner diameter of the piston. When the piston and the anti-rotation ring are installed, the anti-rotation ring deforms and contracts to press against the damper oil storage tank.

[0011] In an optional embodiment of the present invention, the deformation groove extends from the first end face and / or the second end face along the axial direction of the anti-rotation ring, and a plurality of the deformation grooves are evenly arranged along the circumference of the anti-rotation ring.

[0012] In an optional embodiment of the present invention, the deformation groove includes a first deformation groove that penetrates the anti-rotation ring radially and extends from the first end face and / or the second end face along the axial direction of the anti-rotation ring.

[0013] In an optional embodiment of the present invention, the deformation groove includes a second deformation groove, which extends from the first end face and / or the second end face along the axial direction of the anti-rotation ring to form a cavity.

[0014] In an optional embodiment of the present invention, on the first circumferential side of the anti-rotation ring, the first deformation groove and the second deformation groove are arranged alternately along the circumferential direction, and the first circumferential side is the side where the first end face is located or the side where the second end face is located.

[0015] In an optional embodiment of the present invention, on the second circumferential side of the anti-rotation ring, the first deformation grooves are evenly distributed circumferentially, and the axial position of each first deformation groove corresponds to the middle region of the second deformation groove on the first circumferential side, wherein the second circumferential side is the side opposite to the first circumferential side.

[0016] In an optional embodiment of this utility model, the outer surface of the anti-rotation ring is formed with a draft angle.

[0017] In an optional embodiment of this utility model, the anti-rotation ring is made of nylon or aluminum.

[0018] The technical advantages of this invention are as follows: by using the frictional torque between the compressed anti-rotation ring and the oil reservoir and piston to suppress relative rotation, it significantly reduces noise; by utilizing the staggered distribution of the first and second deformation grooves on both sides, it absorbs the deformation caused by interference fit to the greatest extent, achieving a better anti-rotation effect, avoiding seal ring misalignment, reducing weight, and adapting to different fit tolerances; the anti-rotation ring size matches the oil reservoir and piston size, and the draft angle design facilitates installation and simplifies the process. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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 these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the connection structure of the air spring anti-rotation structure in an optional embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the anti-rotation ring in an optional embodiment of the present invention.

[0022] Label Explanation:

[0023] 100. Oil reservoir; 200. Anti-rotation ring; 300. Sealing ring; 400. Piston;

[0024] 210, First end face; 220, Second end face; 230, First deformation groove; 240, Second deformation groove. Detailed Implementation

[0025] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0027] As the automotive industry continues to demand higher levels of driving comfort, air springs, due to their excellent damping performance and load adaptability, are gradually becoming a core component of mid-to-high-end passenger vehicles. Air springs and shock absorbers are assembled to form an air spring-shock absorber strut assembly, which plays a crucial role in supporting the vehicle's weight and transmitting vertical and lateral loads. During vehicle operation, relative rotation between the air spring and the shock absorber is inevitable, generating noise between the piston and the shock absorber spring seat, resulting in poor NVH performance.

[0028] Please see Figures 1 to 2 This utility model proposes an air spring anti-rotation structure, including a shock absorber oil reservoir 100, an anti-rotation ring 200, a sealing ring 300, and a piston 400. The anti-rotation ring 200 is a straight cylindrical structure, sleeved on the outside of the shock absorber oil reservoir 100, and has multiple deformation grooves along its circumferential direction to achieve deformation and contraction. The piston 400 is installed on the outside of the anti-rotation ring 200. When the piston 400 presses against the anti-rotation ring 200, the anti-rotation ring 200 deforms and contracts, and clamps the shock absorber oil reservoir 100, achieving a tight fit between the three components. The frictional torque prevents the relative rotation between the air spring and the shock absorber. The sealing ring 300 is used to seal the entire structure and seal the compressed air in the air spring. The frictional torque between the compressed anti-rotation ring 200 and the oil reservoir 100 and piston 400 suppresses relative rotation, achieving high-strength anti-rotation. The deformation groove absorbs the deformation caused by interference fit, achieving a tight fit and avoiding the offset of the sealing ring 300, with good deformation adaptability. The anti-rotation ring 200 has good structural design adaptability, is easy to install, simplifies the process, and achieves overall structural lightweighting.

[0029] Please see Figures 1 to 2 In an optional embodiment of this utility model, the anti-rotation ring 200 is a cylindrical structure, which is sleeved on the outside of the damper oil reservoir 100. This structure is simple, easy to manufacture, and effectively avoids problems such as assembly tilting due to manufacturing angle errors. The anti-rotation ring 200 connects the piston 400 to the damper oil reservoir 100. The inner diameter of the anti-rotation ring 200 is clearance-fitted with the outer diameter of the oil reservoir 100, while the outer diameter of the anti-rotation ring 200 is interference-fitted with the inner diameter of the piston 400. When the piston 400 and the anti-rotation ring 200 are installed, the anti-rotation ring 200 deforms and contracts, pressing against the damper oil reservoir 100. Before assembly, the anti-rotation ring 200 and the oil reservoir 100 are fitted with a clearance fit to facilitate connection. At the same time, the anti-rotation ring 200 and the piston 400 are fitted with an interference fit. Since the anti-rotation ring 200 is provided with a deformation groove structure, when the piston 400 is installed and pressed in, it forces the anti-rotation ring 200 to deform and contract inward to hug the oil reservoir 100, thereby achieving a tight connection between the three. The frictional torque prevents the relative rotation of the air spring and the shock absorber. The installation is simple and can achieve excellent anti-rotation effect.

[0030] Please see Figures 1 to 2In an optional embodiment of this utility model, the anti-rotation ring 200 includes a first end face 210 and a second end face 220 that are parallel to each other. The first end face 210 is mounted on the same plane as the end face of the spring disc of the shock absorber oil tank 100 and the end face of the piston 400. The second end face 220 is connected to the sealing ring 300 to seal the shock absorber oil tank 100 and the piston 400. After installation, the end face of the piston 400, the end face of the spring disc, and the first end face 210 of the anti-rotation ring 200 are on the same plane. Therefore, during the assembly process, the gap between the piston 400 and the spring disc can be monitored to confirm whether the piston 400 and the shock absorber oil tank 100 are properly installed, making the installation simple and convenient.

[0031] Please see Figures 1 to 2 In an optional embodiment of this utility model, a sealing ring 300 is provided on the second end face 220 of the anti-rotation ring 200, and the sealing ring 300 is connected to the oil reservoir 100. After the piston 400 is pressed in, the sealing ring 300 seals the compressed air in the air spring. Due to the tight fit between the anti-rotation ring 200 and the piston 400, the air spring piston 400 and the axis of the shock absorber are concentric, so the sealing ring 300 will not be offset, thus ensuring the reliability of the seal. By achieving a tight connection between the piston 400 and the oil reservoir 100 through the anti-rotation ring 200 and ensuring the sealing effect through the sealing ring 300, it can be applied to assembly situations where the inner diameter of the piston 400 and the outer diameter of the oil reservoir 100 are too large, which can greatly reduce the weight of the parts and achieve lightweighting.

[0032] Please see Figures 1 to 2 In an optional embodiment of this utility model, the deformation groove extends axially from the first end face 210 and / or the second end face 220 along the anti-rotation ring 200, and a plurality of deformation grooves are evenly arranged circumferentially along the anti-rotation ring 200. Specifically, the deformation groove includes a first deformation groove 230 and a second deformation groove 240, wherein the first deformation groove 230 penetrates the anti-rotation ring 200 radially and extends axially from the first end face 210 and / or the second end face 220 along the anti-rotation ring 200; the second deformation groove 240 extends axially from the first end face 210 and / or the second end face 220 along the anti-rotation ring 200 to form a cavity. By absorbing the deformation of the interference fit through the setting of the deformation groove, the anti-rotation ring 200 can shrink and press against the oil reservoir 100 when the piston 400 is pressed in. Thus, the anti-rotation ring 200 can adapt to different assembly structures to deform in order to ensure the stability of the connection between the piston 400 and the damper and avoid relative rotation. At the same time, the slotted and cavity structure is easy to manufacture, which also makes the anti-rotation ring 200 simple and lightweight.

[0033] Please see Figures 1 to 2In one optional embodiment of this invention, on the first circumferential side of the anti-rotation ring 200, the first deformation groove 230 and the second deformation groove 240 are arranged alternately along the circumference, with the first circumferential side being the side where the first end face 210 or the side where the second end face 220 is located; on the second circumferential side of the anti-rotation ring 200, the first deformation grooves 230 are evenly distributed along the circumference, and the axial position of each first deformation groove 230 corresponds to the middle area of ​​the second deformation groove 240 on the first circumferential side, with the second circumferential side being the side opposite to the first circumferential side. Utilizing the staggered deformation groove structure, deformation from interference fits is absorbed, enabling the installation of structures with different fit tolerances. In other embodiments, only a radially penetrating first deformation groove 230 may be provided, or a second deformation groove 240 may be formed inside the anti-rotation ring 200.

[0034] Please see Figures 1 to 2 In a specific embodiment of this utility model, the first deformation groove 230 is a vertical groove, which is disposed on both sides of the anti-rotation ring 200 and is evenly spaced along the circumference, with 8 first deformation grooves 230 on each side; 8 second deformation grooves 240, i.e. deformation cavities, are disposed on one side of the anti-rotation ring 200 and are arranged alternately with the first deformation grooves 230 on that side along the circumference, and the first deformation grooves 230 on the other side pass through the middle of the second deformation grooves 240. The connection between the two is inside the deformation cavity, which divides the second deformation groove 240 into two U-shaped cavity structures. Thus, the vertical grooves and U-shaped cavities are evenly spaced along the circumference of the positioning groove. By using this staggered arrangement structure, the deformation adaptability is enhanced, and the assembly interference of the anti-rotation ring 200 and piston 400 can be absorbed to the greatest extent. The deformation absorption effect is good, and the anti-rotation torque can be above 200 N·m. It is more reliable under the current situation of increased load on the air spring, and at the same time, the installation force of the press-fit anti-rotation ring 200 is reduced, which facilitates installation.

[0035] It is understandable that the structure of the first deformation groove 230 and the second deformation groove 240 is not restricted; they can be U-shaped grooves, rectangular grooves or other structural grooves, as long as they meet the requirements of the mold production process.

[0036] In other embodiments, the number of the first deformation groove 230 and the second deformation groove 240 can be set in various ways to ensure an alternating distribution structure; the distribution of the first deformation groove 230 and the second deformation groove 240 can also be set in different ways. For example, the first deformation groove 230 and the second deformation groove 240 can be set at intervals on only one side, or the first deformation groove 230 and the second deformation groove 240 can be set at intervals on both sides, etc.

[0037] Please see Figures 1 to 2In one optional embodiment of this utility model, the outer surface of the anti-rotation ring 200 is formed with a draft angle. For example, a draft angle of 0.5° is provided on the surface of the anti-rotation ring 200, that is, along the axial direction of the anti-rotation ring 200, it is inclined outward by 0.5° from the side wall of the second end face 220 towards the first end face 210. The first end face 210 facilitates the installation of the piston 400 and the interference fit between the anti-rotation ring 200 and the piston 400, improves the installation guidance, and simplifies assembly. In other embodiments, the draft angle can also be set to other angles or the draft angle can be omitted to adapt to different assembly conditions.

[0038] Please see Figures 1 to 2 In one optional embodiment of this utility model, the anti-rotation ring 200 is made of nylon or aluminum, which is low in cost. Combined with the deformation groove, it can achieve the anti-rotation effect while realizing the overall structure is lightweight.

[0039] Please see Figures 1 to 2 During assembly, firstly, the anti-rotation ring 200 is installed on the outside of the damper oil reservoir 100 according to the draft angle direction, with the first end face 210 aligned with the end face of the spring disc of the damper oil reservoir 100; then, the sealing ring 300 is installed on the damper oil reservoir and lubricated. The inner surface of the sealing ring 300 contacts and engages with the damper oil reservoir, and the outer surface of the sealing ring 300 contacts the second end face 220 of the anti-rotation ring 200 to form a sealing surface; finally, the piston 400 is pressed in using a special tooling until the end face of the piston 400 is flush with the first end face 210 and the end face of the spring disc. At this time, the inner surface a area of ​​the piston 400 is tightly fitted with the anti-rotation ring 200, forcing the anti-rotation ring 200 to deform and contract and hug the damper oil reservoir b area. Under the tight compression of the three, the relative rotation between the three can be prevented, thereby achieving the purpose of preventing noise caused by the relative rotation of the three.

[0040] In summary, the air spring anti-rotation structure of this utility model achieves a tight fit between the anti-rotation ring 200 and the oil reservoir 100 and the piston 400 through deformation. It uses frictional torque to suppress relative rotation, is easy to install, and can achieve high-strength anti-rotation. The staggered distribution of the first deformation groove 230 and the second deformation groove 240 on both sides absorbs the deformation caused by interference fit to the greatest extent, avoids the offset of the sealing ring 300, reduces weight, and can adapt to different fit tolerances. The design of the anti-rotation ring 200 matches the dimensions of the oil reservoir 100 and the piston 400, and also has a draft angle. The overall structure is simple, easy to install, and simplifies the process.

[0041] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0042] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0043] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0044] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0045] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0046] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0047] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0048] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0049] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A spring-loaded anti-rotation structure, characterized in that, include: Shock absorber oil reservoir; An anti-rotation ring, which is a straight cylindrical structure, is sleeved on the outside of the oil reservoir of the shock absorber, and has multiple deformation grooves along the circumferential direction on the anti-rotation ring. A piston is installed on the outside of the anti-rotation ring. The piston presses the anti-rotation ring so that the anti-rotation ring deforms and contracts to grip the damper oil reservoir.

2. The air spring anti-rotation structure according to claim 1, characterized in that, The anti-rotation ring includes a first end face and a second end face that are parallel to each other. The first end face is mounted on the same plane as the spring plate end face of the shock absorber oil tank and the end face of the piston. The second end face is connected to a sealing ring to seal the shock absorber oil tank and the piston.

3. The air spring anti-rotation structure according to claim 1, characterized in that, The inner diameter of the anti-rotation ring is clearance-fitted with the outer diameter of the oil reservoir, and the outer diameter of the anti-rotation ring is interference-fitted with the inner diameter of the piston. When the piston and the anti-rotation ring are installed, the anti-rotation ring deforms and contracts to press against the damper oil reservoir.

4. The air spring anti-rotation structure according to claim 2, characterized in that, The deformation groove extends from the first end face and / or the second end face along the axial direction of the anti-rotation ring, and the plurality of deformation grooves are evenly arranged along the circumference of the anti-rotation ring.

5. The air spring anti-rotation structure according to claim 4, characterized in that, The deformation groove includes a first deformation groove that penetrates the anti-rotation ring radially and extends from the first end face and / or the second end face along the axial direction of the anti-rotation ring.

6. The air spring anti-rotation structure according to claim 5, characterized in that, The deformation groove includes a second deformation groove, which extends from the first end face and / or the second end face along the axial direction of the anti-rotation ring to form a cavity.

7. The air spring anti-rotation structure according to claim 6, characterized in that, On the first circumferential side of the anti-rotation ring, the first deformation groove and the second deformation groove are arranged alternately along the circumferential direction, and the first circumferential side is the side where the first end face is located or the side where the second end face is located.

8. The air spring anti-rotation structure according to claim 7, characterized in that, On the second circumferential side of the anti-rotation ring, the first deformation grooves are evenly distributed circumferentially, and the axial position of each first deformation groove corresponds to the middle region of the second deformation groove on the first circumferential side. The second circumferential side is the side opposite to the first circumferential side.

9. The air spring anti-rotation structure according to claim 1, characterized in that, The outer surface of the anti-rotation ring has a draft angle.

10. The air spring anti-rotation structure according to claim 1, characterized in that, The anti-rotation ring is made of nylon or aluminum.

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