CN218972043U

CN218972043U - Durable metal hose

Info

Publication number: CN218972043U
Application number: CN202222228431.6U
Authority: CN
Inventors: 王彪
Original assignee: Jiangyin Desen Auto Parts Co ltd
Current assignee: Jiangyin Desen Auto Parts Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-05-05
Anticipated expiration: 2032-08-24

Abstract

The utility model discloses a durable metal hose which is used in a metal hose assembly for exhaust of a commercial vehicle, wherein an expansion layer is arranged in the metal hose assembly, the metal hose assembly comprises at least one weak deformation section and strong deformation sections which 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. 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 amount of the metal hose is large due to the fact that the installation is irregular can be reduced, the service life of the metal hose under the condition of poor installation is effectively prolonged, the metal hose can be adapted when the installation accuracy is low, in addition, due to the addition of the weak deformation section, the resonance possibility is reduced, and the metal hose is firm and durable.

Description

Durable metal hose

Technical Field

The utility model belongs to the field of automobile part manufacturing, and particularly relates to a durable metal hose.

Background

The aggravation of the greenhouse effect makes people more and more conscious about environmental protection. The metal hose for automobile exhaust is used as a flexible element on an automobile, and has the functions of absorbing and slowing down vibration and displacement of an 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 the main performances of the metal hose comprise rigidity, strength, stability and fatigue life. With the increasing demand of society for environmental protection and the increasing strictness of national standards for exhaust emissions, the national standards require low leakage or even 0 leakage. 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 multifunctional metal hose assembly for the exhaust of the commercial vehicle, and the metal hose comprises a corrugated pipe and a telescopic pipe, and has the advantages of enough softness, enough heat preservation and enough strong damping effect. However, when the metal hose is large in installation deviation or irregular in installation, particularly when the metal hose is large in deformation, dry friction is generated between the inner wall of the 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 on the outer side 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 durable metal hose with good resonance resistance and long service life.

The utility model is realized by the following technical scheme:

the utility model provides a durable metal collapsible tube for in the commercial car exhaust metal collapsible tube assembly that inside was 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 close wave form, weak section of warping is straight tubular 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, 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 the strong deformation section and peak spacing greater than the strong deformation section, the transition section is a straight barrel structure, and the joint is connected with the straight barrel 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 durable metal hose disclosed by the utility model is ingenious in structure, the metal hose not only keeps 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 durable 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 durable 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 structure of an embodiment 1 of the present utility model;

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

FIG. 3 is a schematic structural diagram of an 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 of FIG. 4;

FIG. 6 is a schematic structural diagram of the use structure of embodiment 3 of the present utility model;

FIG. 7 is a cross-sectional view of FIG. 6;

fig. 8 is an enlarged view at a of fig. 7.

Detailed Description

Example 1

As shown in fig. 1-2, a durable 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 integrally formed and are arranged at two sides of the weak deformation section 1 at intervals, wherein the strong deformation section 2 is of a dense wave type corrugated structure, and the weak deformation section 1 is of a straight cylindrical structure.

The wave crest of the corrugated structure of the strong deformation section 2 is formed into a sharp angle flat structure.

The metal hose 10 has a single-layer structure.

A transition section 3 extends uniformly and integrally on the outer side of the strong deformation sections 2 on both sides of the metal hose 10, wherein the transition section 3 is used for being fixed with a joint respectively. 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.

The transition section 3 is close to the corrugated structure of strong deformation section 2, and peak height is less than strong deformation section, peak interval are greater than 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 aspect ratio of the metal hose 10 is greater than 1.6.

As shown in fig. 1-2, the metal hose assembly for exhaust of a commercial vehicle is made of the metal hose, and comprises a metal hose 10, wherein a 1-layer telescopic pipe 20 is matched in the metal hose 10, and a plurality of anti-resonance elements 30 which are uniformly distributed are arranged between the outermost telescopic pipe 20 and the metal hose 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

As shown in fig. 3-5, the metal hose 10 includes 3 weak deformation sections 1 integrally formed and strong deformation sections 2 spaced on both sides of each weak deformation section 1, except for other features as in embodiment 1.

Example 3

As shown in fig. 6-8, the wave crest of the corrugated structure of the strong deformation section 2 has a circular wave structure, except for other features, as in embodiment 1. The metal hose 10 has a double-layer structure.

The metal hose for the exhaust of the multifunctional commercial vehicle has ingenious structure, and due to the matching of the weak deformation section and the strong deformation section, the metal hose not only maintains good elasticity and damping effect, but also has the bending resistance capable of reducing 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 fact that the installation is irregular, the service life of the metal hose under the condition of poor installation is effectively improved, the installation precision is low, in addition, due to the addition of the weak deformation section, the integral strength and torsion resistance of the metal hose are improved, the resonance possibility is reduced, the fatigue resistance is improved, the service life of the metal hose is further prolonged, the application range is wider, the practicability is strong, and the metal hose is worthy of popularization.

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

1. The durable 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 is characterized by comprising at least one weak deformation section and strong deformation sections which 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; 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 heights lower than the strong deformation section and peak distances greater than 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 corrugated structure on the transition section is a structure which is far away from the strong deformation section and gradually reduces the height of the peak.

2. The durable metal hose of claim 1, wherein the metal hose has an aspect ratio greater than 1.6.

3. The durable metal hose of claim 1, wherein the metal hose includes a weak deformation section and strong deformation sections at opposite ends of the weak deformation section.