Hydraulic pipeline sheath of automobile brake system

Abstract

The utility model provides a hydraulic pipeline sheath of an automobile brake system, belongs to the technical field of automobile shock absorption and noise reduction, and aims to solve the problems of limited shock absorption and noise reduction effects and difficulty in meeting requirements due to the fact that a sheath made of rubber or plastic is adopted for manufacturing in the prior art. Comprising a sheath body, the sheath body comprises an elastic layer and a functional layer, the elastic layer is made of an elastic material, the elastic layer is located on the inner side of the sheath body, the functional layer wraps the outer wall of the elastic layer, a plurality of rigid structures are arranged in the functional layer, and the number of the rigid structures is larger than that of the elastic layer. The plurality of rigid structures are distributed at equal intervals in the circumferential direction of the functional layer so as to be arranged in an array; according to the hydraulic pipeline sheath of the automobile braking system based on the thin film type acoustic metamaterial, vibration and noise can be effectively reduced within the frequency range of 150Hz-1000Hz, elastic waves are accurately regulated and controlled through rigid structures which are periodically arranged in the functional layer, and efficient damping and noise reduction are achieved by combining the synergistic effect of multiple layers of structures.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile shock absorption and noise reduction, and particularly relates to an automobile brake system hydraulic pipeline sheath. BACKGROUND

[0002] The automobile brake system hydraulic pipeline is often accompanied by a noise that is difficult to ignore and exists continuously under normal working conditions. This noise, like an invisible interference source, has a serious negative impact on the experience of the driver and passenger. Specifically, when the hydraulic pipeline starts to operate, the flow of the liquid inside and the interaction between the components will produce vibration noise. The frequency range of these noises is widely distributed between 100Hz and 5000Hz, forming a wide and dense noise spectrum. Within this frequency band, the noise not only has a high intensity, like continuous knocking, but also has strong penetrating power, which can easily penetrate the sound insulation materials and sealing structures inside the car and directly invade the driving space, causing significant interference and damage to the acoustic environment inside the car.

[0003] For the driver and passenger, being in such a high-frequency and continuous noise environment for a long time is undoubtedly a double physical and mental torture. It not only makes people feel restless and affects their mood, but also distracts their attention and reduces the safety of driving. Therefore, this noise greatly affects the overall experience of driving and reduces the comfort and pleasure of travel.

[0004] To alleviate this difficult problem, traditionally, automobile manufacturers will install a sheath made of rubber or plastic on the hydraulic pipeline, trying to achieve the effect of shock absorption and noise reduction by increasing damping and isolating vibration. However, the shock absorption and noise reduction capacity of these sheaths made of traditional materials is relatively limited in actual application, especially when it comes to high-frequency vibration noise, its suppression effect is greatly discounted, and it is difficult to meet the high standard requirements of modern automobiles for creating a quiet and comfortable driving environment. SUMMARY

[0005] Therefore, the utility model provides an automobile brake system hydraulic pipeline sheath to solve the problem of limited shock absorption and noise reduction effect of the sheath made of rubber or plastic in the prior art.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] An automobile brake system hydraulic pipeline sheath, comprising a sheath body, the sheath body comprising an elastic layer and a functional layer, the elastic layer being made of an elastic material, the elastic layer being located on the inner side of the sheath body, the functional layer being wrapped on the outer wall of the elastic layer, the inside of the functional layer being provided with a rigid structure, the rigid structure being a plurality of, the plurality of rigid structures being distributed equidistantly along the circumference of the functional layer to form an array.

[0008] In this technical solution, it should be noted that the functional layer uses epoxy resin as a matrix and uniformly distributes a large number of cylindrical titanium alloy rigid structures. Although it contains rigid structures, the overall functional layer is not completely rigid. This is because the epoxy resin matrix itself has a certain degree of flexibility and plasticity. The functional layer is a composite material layer composed of the epoxy resin matrix and the rigid titanium alloy structures. The elastic layer is designed as a unique elastic thin-film layer structure. Thin-film acoustic metamaterials, with their extraordinary ability to control the propagation of elastic waves, provide a new perspective and solution for solving the vibration and noise problems generated by hydraulic lines in automotive braking systems. After rigorous testing and verification, the hydraulic line sheath for automotive braking systems designed based on thin-film acoustic metamaterials has demonstrated excellent performance in significantly reducing vibration and noise in the key frequency range of 150Hz to 1000Hz. This sheath, through its carefully designed periodically arranged rigid structures in the functional layer, precisely and effectively controls elastic waves. These rigid structures act like miniature acoustic filters, selectively guiding or blocking the propagation path of elastic waves, thereby significantly reducing vibration and noise within a specific frequency range. At the same time, the synergistic effect of the multi-layer structure further enhances the vibration reduction and noise reduction effect, achieving efficient and stable performance.

[0009] Preferably, the rigid structure is a cylindrical structure made of aluminum alloy, the height of the rigid structure is 0.4 mm, and the bottom diameter of the rigid structure is 0.5 mm.

[0010] In this technical solution, it should be noted that the height of the cylinder is set to 0.4mm and the bottom diameter to 0.5mm. This dimensional design, while ensuring that the overall weight is not significantly increased, cleverly utilizes physical properties to effectively scatter and interfere with elastic waves. This design not only optimizes material utilization efficiency but also ensures that, in practical applications, the cylinder can achieve the dual goals of lightweighting and efficient vibration and noise reduction without sacrificing performance.

[0011] Preferably, the period of the rigid structure array is 1.8 mm.

[0012] In this technical solution, it should be noted that the rigid structure is evenly distributed in the outer functional layer in the form of a rectangular array with a period of 1.8mm. Through this periodic arrangement, the elastic wave can be precisely controlled within a specific frequency range, thereby achieving efficient vibration reduction and noise reduction.

[0013] Preferably, the functional layer is made of polycarbonate material and the thickness of the functional layer is 3.5 mm.

[0014] It should be noted that in this technical solution, polycarbonate material has good mechanical properties and stability, which can firmly fix the periodic rigid structure and ensure the reliability and durability of the entire system.

[0015] Preferably, the inner wall of the elastic layer has multiple protrusions, which are equidistantly spaced along the circumference of the elastic layer. The protrusions are made of an elastic material. The height of each protrusion is 0.6 mm, and the width of each protrusion is 1.2 mm.

[0016] It should be noted that in this technical solution, this raised design not only increases the friction between the sheath and the pipeline, preventing the sheath from slipping on the pipeline, but also changes the vibration characteristics of the pipeline surface to a certain extent, further improving the vibration reduction and noise reduction effect.

[0017] Preferably, the elastic layer is made of styrene-butadiene-styrene block copolymer, and the thickness of the elastic layer is 1.5 mm.

[0018] In this technical solution, it should be noted that a styrene-butadiene-styrene block copolymer (SBS) material with excellent viscoelasticity is selected. This material not only possesses good flexibility but also excellent damping performance, effectively converting vibration energy into heat energy for dissipation. After extensive experiments and simulation analysis, its optimal thickness was determined to be 1.5 mm. This thickness ensures that the film has sufficient flexibility to adapt to the shape of the pipeline while maximizing its damping and vibration reduction effect.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0020] 1. In this utility model, the hydraulic pipeline sheath of the automotive braking system based on thin-film acoustic metamaterial can effectively reduce vibration and noise in the frequency range of 150Hz-1000Hz. The elastic waves are precisely controlled by the periodically arranged rigid structure in the functional layer. Combined with the synergistic effect of the multi-layer structure, efficient vibration reduction and noise reduction are achieved.

[0021] 2. In this invention, the elastic thin film layer, with its excellent damping performance, can buffer and absorb vibrations in the early stages of their generation, while the outer functional layer with a periodic rigid structure further regulates the elastic waves attenuated by the thin film layer. The two work together to form a powerful synergistic effect, significantly enhancing the overall vibration reduction and noise reduction effect.

[0022] 3. In this utility model, the raised design of the inner wall of the sheath makes the fit between the sheath and the hydraulic pipeline tighter and more stable. Whether under normal operating conditions during vehicle operation or under extreme operating conditions when encountering complex road conditions, it can ensure that the sheath always maintains good contact with the pipeline, thereby ensuring the stability and reliability of the shock absorption and noise reduction performance. Attached Figure Description

[0023] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the side view structure;

[0026] Figure 3 This is a cross-sectional view of the hydraulic pipeline and the sheath body in this utility model;

[0027] Figure 4 This is a cross-sectional, oblique, three-dimensional structural diagram of the hydraulic pipeline and the sheath body in this utility model.

[0028] Among them: 1-hydraulic pipeline, 2-elastic layer, 3-rigid structure, 4-protrusion, 5-sheath body. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0035] Example 1

[0036] like Figures 1-4 As shown in the figure, this utility model discloses a hydraulic pipeline sleeve for an automotive braking system, including a sleeve body 5. The sleeve body 5 includes an elastic layer 2 and a functional layer. The elastic layer 2 is made of an elastic material and is located inside the sleeve body 5. The functional layer wraps around the outer wall of the elastic layer 2. The functional layer has multiple rigid structures 3 arranged in an array, with equidistant intervals along the circumference of the functional layer. It should be noted that the elastic layer 2 is designed as a unique elastic thin-film layer structure. Thin-film acoustic metamaterials, with their exceptional ability to control the propagation of elastic waves, provide a new perspective and solution for addressing the vibration and noise problems generated by the hydraulic pipeline 1 of the automotive braking system. After rigorous testing and verification, the hydraulic pipeline 1 sleeve for the automotive braking system designed based on thin-film acoustic metamaterials exhibits excellent performance in significantly reducing vibration and noise in the key frequency range of 150Hz to 1000Hz. This sleeve, through the carefully designed periodic arrangement of rigid structures 3 in its functional layer, precisely and effectively controls elastic waves. These rigid structures 3 act like miniature acoustic filters, selectively guiding or blocking the propagation path of elastic waves, thereby significantly reducing vibration and noise within a specific frequency range. Simultaneously, the synergistic effect of the multi-layered structure further enhances the vibration damping and noise reduction effect, achieving highly efficient and stable performance.

[0037] like Figure 3As shown, in this embodiment, the rigid structure 3 is a cylindrical structure made of aluminum alloy. The height of the rigid structure 3 is 0.4 mm, and the diameter of its base is 0.5 mm. It should be noted that the cylinder's height of 0.4 mm and base diameter of 0.5 mm are designed to effectively scatter and interfere with elastic waves without significantly increasing the overall weight. This design not only optimizes material utilization efficiency but also ensures that, in practical applications, the cylinder can achieve both lightweighting and efficient vibration and noise reduction without sacrificing performance.

[0038] like Figure 3 As shown, in this embodiment, the period of the rigid structure 3 array is 1.8 mm. It should be noted that the rigid structure 3 is uniformly distributed in the outer functional layer in a rectangular array with a period of 1.8 mm. Through this periodic arrangement, the elastic wave can be precisely controlled within a specific frequency range, thereby achieving efficient vibration reduction and noise reduction.

[0039] like Figure 3 As shown, in this embodiment, the functional layer is made of polycarbonate material, and the thickness of the functional layer is 3.5 mm. It should be noted that polycarbonate material has good mechanical properties and stability, which can firmly fix the periodic rigid structure 3, ensuring the reliability and durability of the entire system.

[0040] like Figure 3 As shown, in this embodiment, the inner wall of the elastic layer 2 is provided with protrusions 4, and there are multiple protrusions 4, which are equidistantly spaced along the circumference of the elastic layer 2. The protrusions 4 are made of elastic material. The height of the protrusion 4 is 0.6 mm, and the width of the protrusion 4 is 1.2 mm. It should be noted that this design of the protrusions 4 not only increases the friction between the sheath and the pipeline, preventing the sheath from sliding on the pipeline, but also changes the vibration characteristics of the pipeline surface to a certain extent, further improving the vibration reduction and noise reduction effect.

[0041] In this embodiment, the elastic layer 2 is made of styrene-butadiene-styrene block copolymer, and the thickness of the elastic layer 2 is 1.5 mm. It should be noted that styrene-butadiene-styrene block copolymer (SBS) material with excellent viscoelasticity is selected. This material not only possesses good flexibility but also excellent damping performance, effectively converting vibration energy into heat energy for dissipation. After extensive experiments and simulation analysis, its optimal thickness was determined to be 1.5 mm. This thickness ensures that the film has sufficient flexibility to adapt to the shape of the pipeline while maximizing its damping and vibration reduction effect.

[0042] Example 2

[0043] This embodiment is a specific implementation based on Embodiment 1, specifically including:

[0044] Preparation of elastic layer 2: First, styrene-butadiene-styrene block copolymer (SBS) material is processed into an elastic film with a thickness of 1.5 mm by hot pressing. During the processing, temperature and pressure parameters are strictly controlled to ensure the uniformity of film thickness and the stability of material properties.

[0045] Periodic rigid structure 3 and functional layer preparation: An aluminum alloy cylinder with a height of 0.4 mm and a bottom diameter of 0.5 mm was fabricated using precision casting. Simultaneously, a 3.5 mm thick polycarbonate (PC) functional layer was prepared using injection molding. During injection molding, the pre-fabricated aluminum alloy cylinder was precisely embedded into the polycarbonate functional layer in a rectangular array with a period of 1.8 mm, ensuring good bonding strength between the cylinder and the functional layer.

[0046] Processing of protrusion 4: On the inner wall of the prepared elastic film layer 2, a protrusion 4 with a height of 0.6 mm and a width of 1.2 mm is processed along the axial direction using a specific mold and hot pressing process. The protrusion 4 is also made of SBS material to ensure its material consistency with the elastic film layer 2 and good connection performance.

[0047] Assembly of the sheath body 5: The elastic thin film layer 2 with axial protrusions 4 is composited with the polycarbonate functional layer containing periodic rigid structures 3 to form a complete thin-film acoustic metamaterial sheath. During the composite process, a special adhesive or hot-pressing process is used to ensure a tight bond between the two layers and avoid problems such as delamination or gaps.

[0048] Installation and Use: Carefully slip the prepared thin-film acoustic metamaterial sheath onto the hydraulic line 1 of the vehicle's braking system, ensuring a complete fit between the sheath and the line, and full contact between the axial protrusion 4 and the line surface. This effectively encapsulates the hydraulic line 1 and provides vibration and noise reduction. During installation, care must be taken to avoid damaging the sheath to ensure it functions properly during vehicle operation.

[0049] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0050] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic line sleeve for an automotive braking system, characterized in that, The sheath body (5) includes an elastic layer (2) and a functional layer. The elastic layer (2) is made of elastic material and is located inside the sheath body (5). The functional layer is wrapped around the outer wall of the elastic layer (2). The functional layer has a rigid structure (3) inside. There are multiple rigid structures (3), and the multiple rigid structures (3) are distributed at equal intervals along the circumference of the functional layer to form an array.

2. The hydraulic pipeline sleeve for an automotive braking system according to claim 1, characterized in that, The rigid structure (3) is a cylindrical structure made of aluminum alloy. The height of the rigid structure (3) is 0.4 mm and the bottom diameter of the rigid structure (3) is 0.5 mm.

3. A hydraulic pipeline sheath for an automotive braking system according to claim 1, characterized in that, The period of the rigid structure (3) array arrangement is 1.8 mm.

4. A hydraulic pipeline sleeve for an automotive braking system according to claim 1, characterized in that, The functional layer is made of polycarbonate material and has a thickness of 3.5 mm.

5. A hydraulic pipeline sleeve for an automotive braking system according to claim 1, characterized in that, The inner wall of the elastic layer (2) is provided with protrusions (4), and there are multiple protrusions (4), which are equidistantly spaced along the circumference of the elastic layer (2).

6. A hydraulic pipeline sheath for an automotive braking system according to claim 5, characterized in that, The protrusion (4) is made of an elastic material.

7. A hydraulic pipeline sleeve for an automotive braking system according to claim 5, characterized in that, The height of the protrusion (4) is 0.6 mm and the width of the protrusion (4) is 1.2 mm.

8. A hydraulic pipeline sheath for an automotive braking system according to claim 1, characterized in that, The elastic layer (2) is made of styrene-butadiene-styrene block copolymer and has a thickness of 1.5 mm.

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