CN218972044U - Reinforced metal hose - Google Patents

Abstract

The utility model discloses a reinforced metal hose which is used in a metal hose assembly for exhaust of a commercial vehicle, wherein an extensible layer is arranged in the metal hose assembly, the reinforced metal hose comprises at least one weak deformation section and strong deformation sections which are integrally formed and are arranged at two sides of each weak deformation section at intervals, the strong deformation sections are of dense wave type corrugated structures, and the weak deformation sections are of straight cylindrical structures or corrugated structures with wave peak heights lower than the strong deformation sections and wave peak distances larger than the strong deformation sections. According to the utility model, due to the matching of the weak deformation section and the strong deformation section, the dry friction generated between the place with the largest inward bending deformation at the middle and the outer side of the inner telescopic pipe when the deformation of the metal hose is large due to the irregular installation can be reduced, the service life of the metal hose under the condition of poor installation is effectively prolonged, the installation precision is low, and in addition, the resonance possibility is reduced due to the addition of the weak deformation section, so that the multifunctional performance of enough damping effect, good resonance resistance and long service life is realized.

Description

Reinforced metal hose

Technical Field

The utility model belongs to the field of automobile parts, and particularly relates to a reinforced metal hose.

Background

With the increasing of extreme weather, the requirements of various countries on environmental protection are increasingly improved, the standards of China on the exhaust emission of commercial vehicles are more and more strict, and the requirements of national six standards are to realize low leakage and even 0 leakage. The metal hose is used as a flexible element on an automobile exhaust system, plays roles of absorbing and slowing down vibration and displacement of the exhaust system and compensating dimensional changes such as pipelines, equipment and the like or axial, transverse and angular displacements caused by thermal expansion and contraction, mechanical displacement or vibration, and has the main performances including rigidity, strength, stability and fatigue life. The prior metal hose which can be well suitable for the installation and use requirements of commercial vehicles with larger assembly tolerance, such as the utility model patent with the application number of 201610175045.1, discloses a reinforced metal hose assembly, and the metal hose comprises a close-wave type corrugated pipe and a telescopic pipe, which are soft enough, warm enough and strong enough. However, when the metal hose is large in installation deviation or irregular in installation, especially when the metal hose is large in deformation, dry friction is generated between the inner wall of the close-wave type corrugated pipe and the inner telescopic pipe at the place with the largest inward bending deformation at the middle part, and the abrasion of the metal hose and the inner telescopic layer is easily caused due to long dry friction time, so that the service life of the whole exhaust device is reduced. In addition, in order to raise the loading capacity of the truck, the horsepower design of the commercial vehicle is larger and larger, and the vibration is larger and larger, when the metal hose is softer, the resonance of the metal hose for exhaust is more likely to be caused by the large vibration, so that the generation of the resonance is also required to be avoided as much as possible while the sufficient flexibility is ensured. Based on the two problems, it is desirable to find a better solution to this problem.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a reinforced metal hose which has the advantages of sufficient softness, sufficient heat preservation, sufficient strong damping effect, good resonance resistance and long service life.

The utility model is realized by the following technical scheme:

the utility model provides a strenghthened type metal collapsible tube for in commercial car exhaust metal collapsible tube assembly that inside is equipped with the expansion layer, including integrated into one piece's at least one weak section of warping and interval setting are in the strong section of warping of each weak section both sides, strong section of warping is the ripple structure of dense wave form, weak section of warping is straight tubular structure or wave peak height be less than strong section of warping, wave peak interval be greater than strong section of warping's ripple structure.

Preferably, the wave crest of the corrugated structure of the strong deformation section is in a circular wave structure or is formed into a sharp corner flat structure. The wave crest is formed into the design of the sharp corner flat structure, so that the distance between the outer side waves of the corrugated pipe is larger than the original distance, and the corrugated pipe has a plurality of advantages: because the wave can be denser, the shock absorption and noise reduction effects are better, the whole stretchability of the metal hose is better, the installation accuracy requirement can be further reduced, and the thermal deformation is small when heated, so that the metal hose is more suitable for a hotter environment or is not easy to generate thermal expansion after long-time use; the corrugated pipe is not easy to be damaged after sundries such as stones are put in, so that the metal hose is durable and the service life is prolonged.

Preferably, the metal hose has a single-layer structure or a double-layer structure. When the metal hose is of a double-layer structure, the forming process is as follows: two sections of steel belts are welded into two straight cylinders with similar diameters respectively, then the two straight cylinders are nested together, and then the two straight cylinders are corrugated and formed together at the same time to form a corrugated pipe.

Preferably, the ripple structure on the weak deformation section is a flat wave or a gradual wave.

More preferably, the corrugated structure on the weak deformation section is a gradual change wave, and when the corrugated structure is a gradual change wave, the corrugated structure gradually decreases in height from two sides to the middle wave peak. The structure ensures that when the deformation of the metal hose is large, the inner wall of the corrugated pipe is positioned at the place with the largest inward bending deformation at the middle part, and the dry friction between the corrugated pipe and the inner telescopic pipe can be avoided.

Preferably, a transition section for fastening to a joint is also integrally formed on the metal hose on the outside of the strongly deformed sections on both sides. The arrangement of the transition section can enable the torsion resistance of the edge to be stronger and the conductivity of the edge to force to be better.

More preferably, the transition section is a corrugated structure with peak height lower than that of the strong deformation section and peak distance greater than or equal to that of the strong deformation section, the transition section is a straight cylinder structure, and the joint is connected with the straight cylinder structure section on the transition section.

Further, the corrugated structure on the transition section is a structure in which the height of the peak gradually decreases away from the strong deformation section.

Preferably, the metal hose has an aspect ratio greater than 1.6.

Preferably, the metal hose comprises a section of weak deformation section and strong deformation sections positioned at two ends of the weak deformation section.

The beneficial effects of the utility model are as follows:

the reinforced metal hose disclosed by the utility model is ingenious in structure, the metal hose not only maintains good elasticity and damping effect due to the matching of the weak deformation section and the strong deformation section, but also can reduce the dry friction generated between the place with the largest inward bending deformation at the middle and the outer side of the inner telescopic pipe when the deformation amount of the metal hose is large due to the fact that the installation is irregular after the bending resistance of the metal hose is increased, so that the service life of the metal hose under the condition of poor installation is effectively prolonged, the installation precision is lower, the reinforced metal hose can also be adapted, in addition, due to the addition of the weak deformation section, the integral strength and the anti-torsion capability of the metal hose are improved, the resonance possibility is reduced, the anti-fatigue strength is improved, the service life of the metal hose is further prolonged, the application range is wider, the practicability is strong, and the reinforced metal hose is worthy of popularization.

Drawings

For ease of illustration, the utility model is described in detail by the following specific examples and figures.

FIG. 1 is a schematic diagram of the usage structure of embodiment 1 of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic diagram of the usage structure of embodiment 2 of the present utility model;

FIG. 4 is a cross-sectional view of FIG. 3;

fig. 5 is an enlarged view at a in fig. 4.

Detailed Description

Example 1

As shown in fig. 1-2, the reinforced metal hose 10 is used in a metal hose assembly for exhaust of a commercial vehicle, in which a telescopic layer 20 is arranged, and comprises a weak deformation section 1 and strong deformation sections 2 which are arranged at two sides of the weak deformation section 1 at intervals, wherein the strong deformation section 2 is a dense wave type corrugated structure, and the weak deformation section 1 is a corrugated structure with wave peak height lower than that of the strong deformation section and wave peak distance greater than that of the strong deformation section 2.

The wave crest of the corrugated structure of the strong deformation section 2 is of a circular wave structure.

The metal hose 10 has a single-layer structure.

The corrugated structure on the weak deformation section 1 is a gradual wave, and the height of the peak gradually decreases from two sides to the middle.

A transition section 3 is also integrally formed on the outer side of the strong deformation sections on both sides of the metal hose 10, and the transition section 3 is used for being fixed with a joint respectively. The transition section is close to the corrugated structure of strong deformation section, and peak height is less than strong deformation section, crest interval is greater than or equal to strong deformation section, and the structure of keeping away from strong deformation section is straight section of thick bamboo structure, connect and be connected with straight section of thick bamboo structure on the transition section.

The corrugated structure on the transition section 3 is a structure with gradually reduced peak height away from the strong deformation section.

The length-diameter ratio of the metal hose is more than 1.6.

1-2 are metal hose assemblies for exhaust of commercial vehicles, which are made of the metal hoses, and comprise metal hoses 10, wherein 1 layer of telescopic tubes 20 are matched in the metal hoses 10, and a plurality of anti-resonance elements 30 which are uniformly distributed are arranged between the outermost telescopic tube 20 and the metal hoses 10; the outer sides of the strong deformation sections on the two sides of the metal hose 10 are uniformly and integrally extended with a transition section 3, the transition section 3 is used for being respectively fixed with a joint 40, and the periphery of the fixed part of the metal hose 10 and the joint 40 is also provided with an outer ring 50 which can wrap the corrugated structure of the strong deformation sections on the two sides.

Example 2

Referring to fig. 3-5, the metal hose 10 includes 3 weak deformation sections 1 and strong deformation sections 2 spaced on two sides of each weak deformation section 1, and peaks of the corrugated structure of the strong deformation sections 2 are formed into sharp-angled flat structures, except other features as in embodiment 1. The metal hose 10 has a double-layer structure.

The specific dimensions of each section of the metal hose in this embodiment can be set to a waveform size by the resonance searching condition after sinusoidal sweep of the vibrating table and the engine parameters to avoid resonance to a greater extent, and further improve the service life of the metal hose.

The foregoing is merely illustrative of specific embodiments of the present utility model, and the scope of the utility model is not limited thereto, but any changes or substitutions that do not undergo the inventive effort should be construed as falling within the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.

Claims (3)

1. The reinforced metal hose is used in a metal hose assembly for exhaust of a commercial vehicle, wherein an expansion layer is arranged in the metal hose assembly, and the reinforced metal hose is characterized by comprising at least one weak deformation section and strong deformation sections which are integrally formed and are arranged at two sides of each weak deformation section at intervals, wherein the strong deformation sections are of dense wave type corrugated structures, and the weak deformation sections are of straight cylindrical structures or corrugated structures with wave peak heights lower than the strong deformation sections and wave peak distances greater than the strong deformation sections;

the wave crest of the corrugated structure of the strong deformation section is in a circular wave structure or is formed into a sharp angle flat structure;

the metal hose is of a single-layer structure or a double-layer structure;

the outer sides of the strong deformation sections positioned on the two sides of the metal hose are uniformly and integrally extended with a transition section which is used for being fixed with a joint respectively;

the transition section is in a corrugated structure with peak height lower than that of the strong deformation section and peak distance greater than or equal to that of the strong deformation section, the transition section is in a straight barrel structure, and the joint is connected with the straight barrel structure section on the transition section;

the metal hose comprises a section of weak deformation section and strong deformation sections positioned at two ends of the weak deformation section.

2. A reinforced metal hose according to claim 1, wherein the corrugation on the weak deformation section is flat or graded.

3. A reinforced metal hose according to claim 1, wherein the metal hose has an aspect ratio of greater than 1.6.

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