Anti-deformation automobile dust cover

Abstract

The utility model discloses an anti -deformation automobile dust cover, including seal cover main part, inlay layer and framework body, the seal cover main part is corrugated flexible sleeve structure, possesses axial and radial elastic deformation ability, inlay layer set up in the seal cover main part inside, be used for buffering stress and absorbing impact, the framework body along the corrugated structure arrangement, be used for the shape support and spacing of dust cover, preferably spiral high resilience silk body. The structure through the synergies of flexible body, inlay buffer layer and framework reinforcement structure, effectively promote dust cover in compression, stretch and torsion operating condition's anti -deformation ability and geometric recovery ability, avoid fatigue collapse and sealing failure, be applicable to the long -term protection use of ball cage, shock absorber etc.

Description

Technical Field

[0001] This utility model relates to the field of automotive dust cover technology, specifically an anti-deformation automotive dust cover. Background Technology

[0002] During operation, a car's chassis, transmission system, and suspension system are constantly subjected to dynamic conditions of vibration, impact, and multi-directional movement. To prevent external debris such as mud, rainwater, and dust from entering critical moving parts, and to maintain lubrication and sealing of components, flexible dust cover structures are usually installed in locations such as CV joints, shock absorbers, and universal joints.

[0003] Existing automotive dust covers are typically made of thermoplastic elastomers or rubber materials in a single molding process. Their main structure is a hollow corrugated tube, which achieves adaptive coverage of moving parts through the axial compression and torsional flexibility of the corrugated sections. Some designs further enhance their shielding performance and flexibility by thickening the corrugations or adding extended skirts. These dust covers possess a certain degree of compressibility and flexibility, capable of meeting the requirements of basic dynamic displacement.

[0004] However, in complex working conditions, the existing dust cover structure still has the following shortcomings: Insufficient resistance to deformation: Although the corrugated pipe structure is flexible, it is prone to local permanent wrinkles or twisting and collapse under long-term stress or high-frequency reciprocating deformation, resulting in poor recovery of the dust cover and inability to maintain a stable shape, which in turn affects the sealing effect.

[0005] Stress concentration leads to fatigue failure: During repeated expansion and contraction deformation, the connection between the troughs and crests of traditional dust covers is repeatedly subjected to stress, which easily forms a stress concentration area. After long-term use, cracks, hardening or breaks may occur, which seriously affects the product's lifespan and reliability.

[0006] In summary, existing automotive dust cover structures still suffer from problems such as insufficient support, irreversible deformation, unstable sealing, and limited fatigue life when dealing with complex road conditions and high-intensity dynamic deformation. Therefore, there is an urgent need for a new type of automotive dust cover structure that possesses shape retention, flexibility, and fatigue resistance to achieve long-term stable sealing and protection. Utility Model Content

[0007] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0008] Therefore, the technical solution adopted by this utility model is as follows: a deformation-resistant automotive dust cover, comprising three parts: a sealing cover body, an inner layer, and a skeleton. Specifically: the sealing cover body has a hollow corrugated structure, serving as an external flexible and elastic protective component with good axial compression and radial flexibility; the inner layer is a buffer layer located on the inner wall or in the middle interlayer of the sealing cover body, used to absorb stress concentration and improve structural toughness; the skeleton is a supporting structure located inside the sealing cover, used to control deformation, enhance stability, and achieve a reset function. Through the coordinated operation of the above structures, the dust cover can maintain its shape integrity, movement coordination, and sealing reliability under long-term complex working conditions.

[0009] In a preferred embodiment, the sealing cover body is further configured as follows: it is a corrugated elastic sleeve structure made of rubber or thermoplastic elastomer material. The corrugated structure has multiple peaks and troughs along the axial direction, and the wall thickness and curvature between different segments are designed to form a flexible gradient structure. Under compression, external stress propagates along the corrugations, which helps in elastic absorption and dispersion, preventing the overall structure from collapsing due to localized stress concentration.

[0010] Specifically, this structure allows the dust cover to maintain its shape elastic recovery within an axial deformation range of ±30 mm, preventing failure due to long-term fatigue.

[0011] In a preferred embodiment, the embedded layer is further configured such that it is located in the middle of the wall of the sealing cover body and can be made of highly elastic and flexible materials such as silicone foam, EVA, or TPV. The thickness of the embedded layer is slightly greater in the trough region than in the crest region, which is beneficial for stress relief and energy absorption. When the dust cover undergoes significant deformation, the embedded layer can act as an intermediate buffer medium, effectively isolating the impact of external forces on the frame, while improving the overall stress adaptability.

[0012] Specifically, the structure maintains good flexibility and energy absorption capacity even in low-temperature environments of -40°C, significantly extending the service life of the dust cover in harsh environments.

[0013] In a preferred embodiment, the skeleton is further configured such that it is disposed inside the main body of the sealing cover and can be a spiral or mesh structure, made of high-elastic steel wire or shape memory alloy wire, which has good deformation recovery performance. The skeleton is distributed along the inner wall of the corrugation, maintaining consistency with the corrugation shape, and deforms synchronously under pressure, tension, or torsion conditions, and can quickly provide recovery force after unloading.

[0014] In a preferred example, the skeleton is further configured such that the spiral nickel-titanium shape memory alloy wire with a coil pitch matching the corrugation pitch is integrated with the rubber body through in-mold pre-embedding.

[0015] Specifically, this structure can significantly improve the structural recovery rate of the dust cover, with a deformation residual rate of less than 5%, which can meet the geometric retention requirements under continuous cyclic deformation conditions.

[0016] In a preferred embodiment, the sealing cover body is further configured such that both ends are provided with mounting flange structures, which can be snap rings, clamps, or groove structures, for reliable engagement and fixation with automotive transmission components. This end structure combines sealing, anti-detachment, and vibration resistance functions, adaptable to different vehicle models and varying installation requirements.

[0017] Specifically, the assembly of this end structure ensures that the dust cover remains stable and sealed even under high-intensity operation, without leakage, loosening, or slippage.

[0018] In a preferred embodiment, the skeleton body is further configured as follows: the skeleton body includes a mesh-like skeleton structure composed of a plurality of first support wires and a plurality of second support wires; the first support wires are distributed circumferentially along the skeleton body to form a plurality of annular support rings; the second support wires are spirally distributed along the axial direction of the skeleton body and are only arranged at the crests of the corresponding dust cover corrugated structure; the first support wires and the second support wires are fixedly connected at the intersection points to form a locally reinforced support mesh with an integrated structure.

[0019] Specifically, the corrugated pipe is at the point where it experiences the most severe stress and deformation. Traditional structures often suffer from instability due to corrugated pipe deformation, leading to the collapse or wrinkling of the dust cover. Placing the second support wire only at the corrugated pipe crest is equivalent to "reinforcing" the area where reinforcement is most needed, which can significantly improve the dust cover's structural integrity under high-frequency vibration and axial compression.

[0020] In summary, this invention, by introducing an embedded buffer layer and an elastic skeleton support layer into the bellows, achieves a comprehensive improvement in the deformation resistance, shape recovery capability, and sealing durability of the traditional dust cover structure. It is particularly suitable for automotive component protection systems that require high sealing performance, long service life, and complex operating conditions, and has broad industrial application prospects and promotional value.

[0021] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, by setting a skeleton inside the main body of the sealing cover, the corrugated structure has stable support and self-recovery ability under various working conditions such as compression, tension and torsion, which significantly improves the deformation resistance of the dust cover and avoids the problem of sealing failure due to structural collapse and permanent deformation.

[0022] 2. In this utility model, the embedded layer forms a flexible buffer zone between the crests and troughs, which can effectively absorb vibration and impact loads, reduce the direct effect of external forces on the cover, enhance the product's durability and shape retention under harsh operating environments such as high and low temperature cycles and flying stone impacts, and improve the overall vehicle driving stability and the service life of the sealing components. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a cross-sectional structural diagram of one embodiment of the present invention; Figure 3 This is a schematic diagram of the skeleton structure of one embodiment of the present invention.

[0024] Figure label: 100. Sealing cover body; 110. Inner layer; 200. Skeleton body. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0026] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0027] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a deformation-resistant car dust cover.

[0028] Combination Figures 1-3 As shown, the present invention provides a deformation-resistant car dust cover, comprising a sealing cover body 100, an inner layer 110, and a skeleton body 200.

[0029] The sealing cover body 100 has a hollow corrugated tube structure, preferably made of neoprene rubber, thermoplastic elastomer, or a polymer material with flexible and stretchable properties. The sealing cover body 100 has mounting flanges or snap-fit ​​structures at both ends for installation with the vehicle's suspension or transmission system. The sealing cover body 100 has an overall wave-like structure with multiple corrugated segments in the axial direction. Each corrugated segment can elastically expand, contract, and deform with the dynamic movement of the vehicle's suspension or transmission system, thus maintaining a good sealing effect. To enhance its deformation adaptability and recovery force, the corrugated segments are structurally designed with a gradually changing wall thickness; that is, the wall thickness of the corrugated segments near the two ends of the sealing cover body 100 is greater than that of the middle corrugated segments, thus forming an elastic gradient structure.

[0030] The embedded layer 110 is disposed between the inner walls of the sealing cover body 100, and may also be a sandwich structure. The embedded layer 110 is a flexible foam layer or an elastic material layer, and has a thickened structure at the troughs. Preferably, the embedded layer 110 is made of flexible silicone foam, ethylene-vinyl acetate copolymer foam (EVA), or thermoplastic elastomer material such as TPV. The embedded layer 110 has a thickened area at the troughs and a thinned treatment at the crests, thereby playing a role in buffering energy absorption and resisting deformation when the dust cover is compressed, impacted, or deformed, improving the overall buffering and stress dispersion capabilities of the dust cover.

[0031] The skeleton 200 is a structural support component disposed inside the sealing cover body 100, such as... Figure 2 and Figure 3 As shown, the skeleton 200 extends along the corrugated section of the sealing cover body 100, serving to limit, support, and structurally reinforce the sealing cover body 100. The skeleton 200 is a mesh structure composed of metal wires or composite material wires, with a spiral or staggered distribution identical in shape to the sealing cover body 100. Preferably, the skeleton 200 is made of shape memory alloy wires, stainless steel wires, or glass fiber reinforced materials, and is formed into a mesh structure through staggered weaving or spiral winding. In this embodiment, the skeleton 200 is composed of spiral high-resilience wires, which are periodically arranged along the axial direction of the sealing cover body 100. This maintains the flexible deformation capability synchronized with the sealing cover body 100, and provides limiting support under external force to prevent excessive deformation.

[0032] Furthermore, to enhance shape recovery, the skeleton 200 is preferably made of a nickel-titanium shape memory alloy, which possesses superelasticity and high recovery capability. After the dust cover is subjected to torsional or compressive deformation, the skeleton 200 can quickly release the deformation stress and restore the sealing cover body 100 to its original geometry, preventing permanent structural wrinkling or collapse.

[0033] In this invention, the sealing cover body 100 is provided with mounting flange structures at both ends for fixed connection with the universal joint housing or shock absorption system in the automotive transmission system, ensuring a secure installation. The flange structure can be an annular groove, an elastic clamp, or a slot with positioning ribs, which facilitates installation and enhances its resistance to pull-out during operation.

[0034] In this invention, the skeleton 200 includes a mesh-like skeleton structure composed of several first support wires and several second support wires. The first support wires are distributed circumferentially along the skeleton 200, forming multiple annular support rings. The second support wires are spirally distributed along the axial direction of the skeleton 200 and are only arranged at the crests of the corresponding dust cover corrugated structure. The first and second support wires are fixedly connected at their intersections, thereby forming a locally reinforced support mesh with an integrated structure. The crests are the locations where the corrugated pipe experiences the most severe stress and deformation. Traditional structures often cause the dust cover to collapse or wrinkle due to instability caused by crest deformation. Arranging the second support wires only at the crests is equivalent to "reinforcing" the most critical locations, significantly improving the dust cover's structural integrity under high-frequency vibration and axial compression. Traditional mesh skeletons often also have axial ribs at the troughs, which can easily cause excessive local stiffness and uneven deformation of the corrugations. Arranging spiral reinforcing wires only at the crests effectively reduces the average stiffness of the overall skeleton, maintains the dust cover's good flexibility and elasticity, and ensures smooth travel and sensitive response.

[0035] In summary, this utility model achieves good elastic expansion and contraction and deformation adaptation through the gradient structure of the sealing cover body 100 and multiple corrugated segments; the inner layer 110 improves its buffering and energy absorption capacity, effectively preventing material cracking caused by local stress concentration; the integrated embedding and elastic limiting function of the skeleton body 200 ensures that the dust cover maintains structural integrity and effective sealing under various working conditions; and the flanges at both ends give the entire dust cover structure excellent installation adaptability and resistance to impact stability.

[0036] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A deformation-resistant automotive dust cover, characterized in that, It includes a sealing cover body (100), an inner layer (110), and a skeleton body (200). The sealing cover body (100) is a hollow bellows structure with multiple bellows sections that can be elastically deformed axially and radially. The inner layer (110) is located inside the wall of the sealing cover body (100) and is used to provide a flexible cushioning function; The skeleton (200) is disposed inside the sealing cover body (100) and extends along the shape of the corrugated section to provide limiting support and structural reinforcement for the sealing cover body (100).

2. The anti-deformation automotive dust cover according to claim 1, characterized in that, The sealing cover body (100) is a corrugated pipe made of rubber or thermoplastic elastomer material, with different corrugated sections having different wall thicknesses and curvature structures.

3. The anti-deformation automotive dust cover according to claim 1, characterized in that, The embedded layer (110) is a flexible foam layer or an elastic material layer, and has a thickened structure at the trough.

4. The anti-deformation automotive dust cover according to claim 1, characterized in that, The skeleton (200) is a mesh structure made of metal wires or composite material wires, with a spiral or staggered distribution that is the same shape as the sealing cover body (100).

5. The anti-deformation automotive dust cover according to claim 4, characterized in that, The skeleton (200) is a shape memory alloy wire braided structure that can restore its original shape after the external force is removed.

6. The anti-deformation automotive dust cover according to claim 1, characterized in that, The sealing cover body (100) is provided with mounting flanges or snap-fit ​​structures at both ends for installation in conjunction with the vehicle suspension system or transmission system.

7. The anti-deformation automotive dust cover according to claim 1, characterized in that, The skeleton (200) includes: a mesh-like skeleton structure composed of a plurality of first support wires and a plurality of second support wires; the first support wires are distributed circumferentially along the skeleton (200) to form a plurality of annular support rings; the second support wires are spirally distributed along the axial direction of the skeleton (200) and are only arranged at the crest of the corresponding dust cover corrugated structure; the first support wires and the second support wires are fixedly connected at the intersection to form a locally reinforced support mesh with an integrated structure.

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