CN2670609Y

CN2670609Y - Flexible metal bellows of vehicle exhaust pipe

Info

Publication number: CN2670609Y
Application number: CNU032097077U
Authority: CN
Inventors: 董菁荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-12
Filing date: 2003-08-12
Publication date: 2005-01-12
Anticipated expiration: 2013-08-12

Abstract

The utility model discloses a flexible metal corrugated hose special for the vehicle exhaust pipe, comprising a metal knitting silk net housing and a corrugated hose body whose both ends are provided with a corrugated hose straight section. The utility model is characterized in that the both ends of the metal knitting silk net housing are fixed with the corrugated hose straight section in the way of spot welding. The corrugated hose straight section is provided with a ferrule fixed on the corrugated hose straight section in the way of external pressing and internal expanding. The metal knitting silk net housing is provided in the ferrule. The end part of the corrugated hose straight section is provided with a connecting part protruding out of the end part of the ferrule. The back part of the ferrule is integrally connected with a horn mouth ferrule cap, and the front part of the ferrule is integrally connected with a baffle part which closely clings to the corrugated hose straight section. The utility model has advantages that the welding hoop used in the prior art is replaced by the cap typed ferrule, and the end part of the corrugated hose straight section is provided with the connecting part protruding out of the end part of the ferrule; the utility model has a firm and reliable connection with the discharge pipe so that false welding and miss welding are uneasy to be caused and the welding current is small; the processing cost of the utility model is low.

Description

A kind of metallic bellows hose specially used for automobile exhaust

Technical field

The utility model relates to a kind of bellows, especially relates to a kind of metallic bellows hose specially used for automobile exhaust.

Background technique

Existing metallic bellows hose specially used for automobile exhaust is that a kind of preceding exhaust pipeline section of automotive muffler that is installed in is set up the flexible compensation device of antivibration, its objective is and eliminate the axial displacement that automobile engine exhaust pipe in use causes because of expanding with heat and contract with cold, and reduce the possibility that automobile is advanced and easily caused outlet pipe fracture or other link to damage when jolting at road.A kind of metallic bellows hose specially used for automobile exhaust is disclosed as the 96116325.X Chinese invention patent that on November 17th, 1999, bulletin was authorized, its body is three stratiform structures, in, the middle level is the bellows body of two superimposed, skin is a metal knitted silk screen outer cover of being close to bellows body, the two ends of metal knitted silk screen outer cover and bellows body are fixing with the weldering hoop, this invention can produce eddy current in exhaust process, to avoid the direct current exhaust, and has the bullet stretchability, anti-fatigue performance such as compressibility and sheathed, softness is freely in running can to make vent systems, durable in use, anti-tired anti-vibration reducing noise sound, significantly improve the usability of automobile, prolong the working life of motor car engine and outlet pipe.But this metallic bellows hose specially used for automobile exhaust yet exists bigger defective, the one, and the welding between the outlet pipe causes rosin joint easily, outer field metal knitted silk screen outer cover seems to weld on the surface, but in fact the bellows body of internal layer does not weld fully up hill and dale with outlet pipe, can produce gas leakage; The 2nd, the connection request welding current of this metallic bellows hose specially used for automobile exhaust and outlet pipe is big, wayward; The 3rd, this metallic bellows hose specially used for automobile exhaust metal knitted silk screen outer cover in manufacture process is generally longer than bellows body, after will welding hoop, metal knitted silk screen outer cover and bellows body and be weldingly fixed on together with spot welding machine, also need polish, cause the waste of man-hour and material.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of at above-mentioned prior art present situation and firm and reliable connection outlet pipe, and it is little to be difficult for rosin joint and welding current, the metallic bellows hose specially used for automobile exhaust that processing cost is low.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: it comprises bellows body and metal knitted silk screen outer cover, the two ends of described bellows body are provided with the bellows straight section, described metal knitted silk screen outer cover two ends and the spot welding of described bellows straight section are fixed, described bellows straight section is provided with lasso, described lasso crimp is fixed on the described bellows straight section, described metal knitted silk screen outer cover places in the described lasso, and the end of described bellows straight section is provided with the attachment portion of outstanding described lasso end.

In order to make in the course of working lasso suit easily, the rear portion of described lasso is provided with the horn mouth lasso cap that one connects.

For the twine that prevents metal knitted silk screen outer cover comes out, the front portion of described lasso can be provided with the stop portions that one connects, described stop portions is close to described bellows straight section, and described metal knitted silk screen outer cover is arranged in the interior described lasso of described stop portions.

Described lasso crimp the mode on the described bellows straight section of being fixed on can be adopted in mould lobe crimp, roll extrusion crimp, spinning crimp or the bellows straight section Tensioning structure and they composite structure arbitrarily.

Compared with prior art, advantage of the present utility model is to substitute weldering hoop of the prior art with the lasso of cap shape, earlier the bellows straight section and the metal knitted silk screen outer cover two ends at bellows body two ends are fixed with spot welding, adopt the mode of external pressure internal expanding that lasso, bellows straight section and metal knitted silk screen outer cover tightly are fixed together then, firm in the extreme.And the attachment portion of outstanding lasso end is set in the end of bellows straight section, and when being connected with outlet pipe like this, welding easily, outlet pipe and the inside bellows straight section do not have to weld phenomenon firmly can not cause rosin joint, leakage to weld in other words yet; Front portion at lasso is provided with the stop portions of being close to the bellows straight section, metal knitted silk screen outer cover is arranged in the lasso in the stop portions, can prevent better that the twine of metal knitted silk screen outer cover from coming out, like this, when welding with outlet pipe, lacked the welding of metal knitted silk screen outer cover port section, welded section reduces, the man-hour of causing because of end face is polished in the course of working and the waste of material have been avoided in easier welding simultaneously; And horn mouth lasso cap is set at the rear portion of lasso, and lasso suit easily in course of working, the obstacle that can also avoid may existing on the ripple at corrugated flexible hose two ends and the ground is collided.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the partial enlarged drawing of Fig. 1;

Fig. 3 is the prior art constructions schematic representation.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

A kind of metallic bellows hose specially used for automobile exhaust, the bellows body 1 and the outer field metal knitted silk screen outer cover 2 that comprise internal layer, the two ends of bellows body 1 are provided with bellows straight section 3, bellows straight section 3 is fixed with metal knitted silk screen outer cover 2 two-end-point solid weldings, lasso 4 is set on bellows straight section 3, the rear portion of lasso 4 is provided with the horn mouth lasso cap 5 that one connects, lasso 4 crimps are fixed on the bellows straight section 3, can adopt interior pressure, rise outward or only interior the pressure or only outer rising, wherein outer end finger: with mould lobe crimp, the mode of roll extrusion crimp or spinning crimp is with lasso 4, bellows straight section 3 and metal knitted silk screen outer cover 2 tightly are fixed together, metal knitted silk screen outer cover 2 places in the lasso 4, thereby the slightly long attachment portion 6 that forms outstanding lasso 4 ends in the end of bellows straight section 3, the end that makes bellows straight section 3, the stop portions of being close to bellows straight section 37 that the front portion of lasso can be provided with also that one connects comes out in order to the twine that prevents metal knitted silk screen outer cover 2 better.

Claims

1, a kind of metallic bellows hose specially used for automobile exhaust, comprise bellows body and metal knitted silk screen outer cover, the two ends of described bellows body are provided with the bellows straight section, it is characterized in that described metal knitted silk screen outer cover two ends and the spot welding of described bellows straight section fixes, described bellows straight section is provided with lasso, described lasso is fixed on the described bellows straight section, described metal knitted silk screen outer cover places in the described lasso, and the end of described bellows straight section is provided with the attachment portion of outstanding described lasso end.

2, a kind of metallic bellows hose specially used for automobile exhaust as claimed in claim 1 is characterized in that the rear portion of described lasso is provided with the horn mouth lasso cap that one connects.

3, a kind of metallic bellows hose specially used for automobile exhaust as claimed in claim 2, the front portion that it is characterized in that described lasso is provided with the stop portions that one connects, described stop portions is close to described bellows straight section, and described metal knitted silk screen outer cover is arranged in the interior described lasso of described stop portions.