CN215486314U - Pipe body connection structure, engine and car - Google Patents

Abstract

The utility model discloses a pipe body connecting structure, an engine and an automobile, wherein the pipe body connecting structure comprises a first pipe body, a second pipe body, a sealing ring and a clamp, and a special-shaped groove is formed in the opening end of the first pipe body; the second pipe body is nested in the open end of the first pipe body; the sealing ring is clamped between the first pipe body and the second pipe body, a limiting bolt is arranged on the outer wall of the sealing ring, and the limiting bolt is clamped with the special-shaped groove; the clamp is sleeved on the outer wall of the opening end of the first pipe body, so that the first pipe body, the sealing ring and the second pipe body are fixed together. The technical scheme of the utility model can improve the compactness of the pipe body connecting structure.

Description

Pipe body connection structure, engine and car

Technical Field

The utility model relates to the technical field of automobiles, in particular to a pipe body connecting structure, an engine and an automobile.

Background

With the increasingly competitive automobile industry, automobile manufacturers have increasingly high requirements for automobile manufacturing. An automobile engine is a device for providing power for an automobile and is an important part in the automobile. The air inlet pipe of the engine can lead air into and out of the supercharger and the throttle body and enter the manifold to provide necessary air for the normal operation of the automobile.

At present, a worm hoop fixing mode is often adopted between an engine air inlet pipe and a supercharger and between the engine air inlet pipe and a throttle body, the fixing mode usually needs to tighten two hoops to achieve the fixing purpose, and the needed assembly space is large. However, when the space at the connection position of the air inlet pipe of the engine is insufficient, a common hoop fixing mode cannot be adopted.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a pipe body connecting structure, aiming at improving the compactness of the pipe body connecting structure.

In order to achieve the above object, the present invention provides a pipe connection structure, including: the pipe fitting comprises a first pipe body, a second pipe body, a sealing ring and a clamp, wherein a special-shaped groove is formed in the opening end of the first pipe body; the second pipe body is nested in the open end of the first pipe body; the sealing ring is clamped between the first pipe body and the second pipe body, a limiting bolt is arranged on the outer wall of the sealing ring, and the limiting bolt is clamped with the special-shaped groove; the clamp is sleeved on the outer wall of the opening end of the first pipe body, so that the first pipe body, the sealing ring and the second pipe body are fixed together.

Optionally, the dysmorphism groove is equipped with the insertion section and the joint section that are linked together, the insertion section is in the axial of first body is upwards extended, the joint section is in the circumference of first body is upwards extended, spacing bolt is followed the insertion section slides in the dysmorphism groove, and is fixed in the joint section.

Optionally, an outer sealing rib is further convexly arranged on an outer wall of the sealing ring, which is in contact with the first pipe body, and the outer sealing rib is in sealing contact with an inner wall surface of the first pipe body.

Optionally, an inner sealing rib is further arranged on the inner wall of the sealing ring in a protruding mode, and the inner sealing rib is in sealing abutting connection with the outer wall surface of the second pipe body.

Optionally, the sealing ring is further formed with a limiting boss, and the limiting boss is exposed out of the opening end of the first pipe body and abuts against the end face of the opening end of the first pipe body.

Optionally, the first pipe body is further provided with a plurality of strip-shaped grooves axially opened along the first pipe body at an open end of the first pipe body, and the strip-shaped grooves and the special-shaped grooves are circumferentially spaced at the open end of the first pipe body.

Optionally, the clamp is provided with a notch, and the limit bolt is clamped with the special-shaped groove and penetrates out of the notch.

Optionally, a limiting portion is further formed on the limiting bolt, and the limiting portion penetrates through the notch and limits and stops one side of the clamping hoop, which is away from the first pipe body.

The utility model further provides an engine, wherein an air inlet is formed in the engine main body, and the pipe body connecting structure is arranged on the air inlet.

The utility model further provides an automobile which comprises the pipe body connecting structure or the engine.

According to one technical scheme, the second pipe body is sleeved in the opening end of the first pipe body, the first pipe body and the second pipe body are sealed through the sealing ring clamped between the first pipe body and the second pipe body, and the first pipe body, the sealing ring and the second pipe body are fixed through the clamp sleeved on the outer wall of the opening end of the first pipe body. Compare in prior art's worm hoop fixed mode, set up the dysmorphism groove at the open end of first body, set up spacing bolt on the sealing washer, make the sealing washer be fixed in the open end of first body through the joint of dysmorphism groove and spacing bolt, avoided the slip position shifting of sealing washer, and then avoided the poor problem of leakproofness that the assembly can not arrive the position and arouse. Meanwhile, the use of one hoop is reduced, on one hand, the assembly cost is reduced, on the other hand, only one hoop needs to be tightened, the process is simple, the operation is convenient, and the assembly efficiency is improved. The structure of second body nestification in the open end of first body makes holistic body connection structure compacter, and its required fitting space is also littleer, can satisfy the assembly requirement when fitting space has the time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of an assembly structure of an embodiment of a pipe connection structure according to the present invention;

FIG. 2 is an exploded view of a tube connection structure according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of an embodiment of a first tube in the tube connecting structure of FIG. 1;

FIG. 4 is a schematic structural view of an embodiment of a seal ring in the pipe coupling structure of FIG. 1;

FIG. 5 is a schematic view of an embodiment of a band of the pipe body coupling arrangement of FIG. 1;

fig. 6 is a schematic structural view of an embodiment of a second pipe in the pipe connection structure of fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	A first pipe body	311	Limiting part
110	Special-shaped groove	320	Outer sealing rib
				111	Insertion section	330	Internal sealing rib
112	Clamping section	340	Spacing boss
				120	Strip-shaped groove	400	Clamp hoop
130	First sealing rib	410	Gap
				200	Second tube	420	Adjusting belt
210	Second sealing rib	430	Locking part
				300	Sealing ring	500	Air inlet silencer cover
310	Limit bolt	600	Air inlet corrugated pipe

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, and a technical scheme that a and B meet simultaneously; in addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a pipe body connecting structure.

Referring to fig. 1 and 2, in the embodiment of the present invention, the pipe connecting structure may be used in an intake pipe assembly of an automobile engine to provide a necessary gas transmission path for the operation of the engine. The pipe connecting structure includes a first pipe 100, a second pipe 200 (see fig. 6), a sealing ring 300, and a band 400. The open end of the first tube 100 is provided with a special-shaped groove 110; the second tube 200 is nested in the open end of the first tube 100; the sealing ring 300 is clamped between the first pipe body 100 and the second pipe body 200, the outer wall of the sealing ring 300 is provided with a limiting bolt 310, and the limiting bolt 310 is clamped with the special-shaped groove 110; the clamp 400 is sleeved on the outer wall of the open end of the first pipe 100 to fix the first pipe 100, the sealing ring 300 and the second pipe 200 together.

In this application, the limiting bolt 310 on the sealing ring 300 is firstly slid into and fixed in the irregular groove 110 of the first pipe 100, so that the sealing ring 300 is fixedly connected with the inner wall of the opening end of the first pipe 100. So can fix a position sealing washer 300, prevent the slip position shifting of sealing washer 300 in the assembling process, and then avoided the poor problem of leakproofness that the assembly can't arrive the position and arouse.

The second tube 200 is inserted into the open end of the first tube 100, so that the seal ring 300 is held between the first tube 100 and the second tube 200. The structure that the second pipe body 200 is nested in the open end of the first pipe body 100 makes the overall pipe body connection structure more compact, and the assembly space required therefor is also smaller, and the assembly requirement when the assembly space is limited can be satisfied. The inner diameter of the first tube 100 is slightly larger than the outer diameter of the second tube 200, so that the second tube 200 can be nested in the open end of the first tube 100, and the difference between the inner diameter of the first tube 100 and the outer diameter of the second tube 200 can be compensated by the sealing ring 300. The sealing ring 300 is made of an elastic material, such as rubber, silica gel, etc., the outer diameter of the sealing ring 300 is slightly larger than the inner diameter of the first tube 100, and the inner diameter of the sealing ring 300 is slightly smaller than the outer diameter of the second tube 200, so that the sealing ring can be clamped between the first tube 100 and the second tube 200 through elastic deformation of the sealing ring, and the sealing ring can seal the first tube 100 and the second tube 200.

Finally, the clamp 400 is sleeved on the outer wall surface of the opening end of the first pipe body 100, and the first pipe body 100, the sealing ring 300 and the second pipe body 200 are fixed together through the clamping effect of the clamp 400. Thus, the sealing connection of the pipe body connecting structure is completed.

It should be noted that slightly larger and slightly smaller are approximate differences, which are meant to achieve the sealing effect of the tube, and it should be understood that the specific differences are not limited as long as the first tube 100, the sealing ring 300 and the second tube 200 can be connected in a sealing manner.

According to one embodiment of the present invention, the second tube 200 is sleeved in the open end of the first tube 100, the first tube 100 and the second tube 200 are sealed by the sealing ring 300 clamped between the first tube 100 and the second tube 200, and the first tube 100, the sealing ring 300 and the second tube 200 are fixed by the clamp 400 sleeved on the outer wall of the open end of the first tube 100. Compared with the worm hoop fixing mode in the prior art, the special-shaped groove 110 is arranged at the opening end of the first pipe body 100, the limiting bolt 310 is arranged on the sealing ring 300, the sealing ring 300 is fixed at the opening end of the first pipe body 100 through clamping of the special-shaped groove 110 and the limiting bolt 310, sliding and shifting of the sealing ring 300 are avoided, and the problem of poor sealing performance caused by the fact that the sealing ring cannot be assembled at any position is further avoided. Meanwhile, the use of one hoop is reduced, on one hand, the assembly cost is reduced, on the other hand, only one hoop needs to be tightened, the process is simple, the operation is convenient, and the assembly efficiency is improved. The structure that the second pipe body 200 is nested in the open end of the first pipe body 100 makes the overall pipe body connection structure more compact, and the assembly space required therefor is also smaller, and the assembly requirement when the assembly space is limited can be satisfied.

Referring to fig. 3, in order to improve the axial connection stability between the sealing ring 300 and the first pipe 100, the special-shaped groove 110 of the first pipe 100 is provided with an insertion section 111 and a clamping section 112, which are communicated with each other, the insertion section 111 extends in the axial direction of the first pipe 100, the clamping section 112 extends in the circumferential direction of the first pipe 100, and the limiting bolt 310 on the sealing ring 300 slides into the special-shaped groove 110 along the insertion section 111 and is fixed to the clamping section 112. It should be noted that the inserting section 111 may be completely parallel to the axial direction of the first tube 100, or may be slightly deviated and substantially parallel to the axial direction of the first tube 100, and similarly, the clamping section 112 may be completely overlapped or substantially overlapped to the circumferential direction of the first tube 100 as long as the length extending direction of the clamping section 112 is the circumferential direction of the first tube 100, in this embodiment, the special-shaped groove 110 is similar to an "L" groove, or may be similar to a side "V" groove, as long as the inserting section 111 provides an assembling position for fixing the position-limiting bolt 310, the clamping section 112 provides a fixing position for fixing the position-limiting bolt 310, and the inserting section 111 and the clamping section 112 are communicated with each other. The irregular groove 110 provides the sealing ring 300 with axial upward fixation of the first pipe body 100, prevents axial sliding displacement of the sealing ring 300 in the assembling process, and avoids the problem of poor sealing of the pipe body connecting structure caused by the fact that the assembly is not in place due to the sliding displacement.

Referring to fig. 4, in order to improve the circumferential connection stability between the sealing ring 300 and the first tube 100, the sealing ring 300 further forms a limiting boss 340, and after the sealing ring 300 is fixed in the open end of the first tube 100, the limiting boss 340 is exposed out of the open end of the first tube 100 and abuts against the end surface of the open end of the first tube 100. Therefore, on one hand, the limiting boss 340 provides an assembly limit position for the assembly of the sealing ring 300 and the first pipe body 100, so as to prompt and guarantee the assembly of the sealing ring 300 and the first pipe body 100 in place, and avoid the problem of poor sealing performance of a pipe body connecting structure caused by the fact that the assembly is not in place; on the other hand, the butt of spacing boss 340 and the open end terminal surface of first body 100 provides the fixed guarantee of circumference for sealing washer 300, has prevented the circumference slip position of scurrying in the sealing washer 300 assembling process, has avoided not in place because of the assembly that the position led to the fact is scurried in the slip, and then the sealed poor problem of body connection structure who arouses.

Referring to fig. 4, in order to improve the sealing performance of the pipe connection structure, an outer sealing rib 320 is further protruded on an outer wall of the sealing ring 300 contacting the first pipe 100, and the outer sealing rib 320 is in sealing contact with an inner wall surface of the first pipe 100. An inner sealing rib 330 is further protruded on the inner wall of the sealing ring 300, and the inner sealing rib 330 is in sealing contact with the outer wall surface of the second tube 200. Of course, the inner wall of the first tube may also be provided with the first sealing rib 130 to cooperate with the outer sealing rib 320 for sealing fixation, and the outer wall of the second tube 200 may also be provided with the second sealing rib 210 to cooperate with the inner sealing rib 330 for sealing fixation. On one hand, the outer sealing ribs 320 and the inner sealing ribs 330 improve the friction force of the contact surfaces of the sealing ring 300 and the first pipe body 100 and the sealing ring 300 and the second pipe body 200, improve the connection sealing performance and stability among the sealing ring 300, the first pipe body 100 and the second pipe body 300, and prevent the problem of poor sealing caused by connection sliding or shaking caused by external force in the assembling process and the using process of the pipe body connecting structure; on the other hand, while the sealing ring 300 itself can generate elastic deformation to compensate the sealing performance, the structure of the outer sealing rib 320 and the inner sealing rib 330 improves the product strength of the sealing ring 300, prevents the excessive deformation of the sealing ring 300, and improves the service life of the sealing ring.

Referring to fig. 5, in order to fix the first pipe 100, the sealing ring 300 and the second pipe 200, a clamp 400 is sleeved on an outer wall of an opening end of the first pipe 100. The type of the band 400 can be selected according to the material or thickness of the first and second bodies 100 and 200, such as a T-shaped band, a euro-shaped band, etc. The clip 400 is provided with a notch 410, and the limit bolt 310 is clamped with the special-shaped groove 110 and penetrates out of the notch 410. In this embodiment, in order to facilitate the adjustment of the clamp 400 in different clamp degrees, the notch 410 is set to be a long strip, the opening of the notch 410 is larger than the size of the limit bolt 310, and the number of the notches 410 is consistent with the limit bolt 310 and the irregular groove 110, it can be understood that as long as the shape, size and number of the notches 410 can satisfy the fixation of the clamp 400, no limitation is made to the specific shape, size and number thereof. Thus, the first pipe 100, the sealing ring 300, and the second pipe 200 can be stably fixed together by the tightening action of the clamp 400.

Further, be equipped with on clamp 400 and establish the locking portion 430 and the regulation band 420 that establish at the body outer wall and with the contact of body outer wall that realize the tight hoop effect, when clamp 400 tightly hooped the body, along with the tight hoop of locking portion 430, regulation band 420 passed locking portion 430 and moved in the circumference of clamp 400 to guarantee clamp 400 to the tight hoop effect of the body connection structure of different pipe diameters. The length of the adjustment band 420 passing through the locking part 430 is different according to the tightening degree of the band 400. In order to ensure that the pipe connecting structure can be firmly fixed under different tightening degrees, a limiting portion 311 is further formed on the limiting bolt 310, and the limiting portion 311 penetrates through the notch 410 and limits and stops the side, away from the first pipe 100, of the clamping hoop 400. So, under the different tight hoop degree of clamp 400, the homoenergetic guarantees that spacing portion 311 is fixed to clamp 400's outer wall, prevents body connection structure in the use, because of the slip of clamp 400 ascending in week that exogenic action production vibration brought, and then body connection structure's that causes connection stability problem.

Further, the last spacing boss 340 that is equipped with of rubber circle 300 can be to the axial positioning of clamp 400, on the one hand, spacing boss 340 provides clear and definite mounted position suggestion for the installation of clamp 400, on the other hand, spacing boss 340 carries out the axial spacingly to clamp 400, avoid body connection structure in the use, the axial slip position of clamp 400 that causes because of the exogenic action, and then avoided the first body 100 that clamp 400 tight hoop position dislocation caused, sealing washer 300 and second body 200 three connect unstably.

Referring to fig. 3, in order to improve the sealing performance of the pipe connection structure, the first pipe 100 is further provided with a plurality of strip grooves 120 axially opened along the opening end, and the strip grooves 120 and the special-shaped grooves 110 are circumferentially spaced at intervals at the opening end of the first pipe 100. After the first pipe body 100, the sealing ring 300 and the second pipe body 200 are assembled, the first pipe body 100, the sealing ring 300 and the second pipe body 200 are tightly hooped and tightened through the hoop 400, the structure of the strip-shaped groove 120 enables the opening end of the first pipe body 100 to elastically contract in the hoop 400 tightening process, so that the first pipe body 100 is abutted to the rubber ring 300, the rubber ring 300 is given external force which is inwards compressed along the radial direction of the rubber ring 300, and the sealing ring 300 is elastically deformed to achieve the sealing effect of the pipe body. The structure of the strip-shaped groove 120 can provide a larger acting force for the elastic deformation of the sealing ring 300 in the tightening process of the clamp 400, so that the elastic deformation of the sealing ring 300 is greatly changed, and the sealing performance of the pipe body connecting structure is further improved.

In this embodiment, the strip groove 120 is a rectangular structure, and may be a similar "V" shaped groove, it can be understood that, as long as the strip groove 120 can make the open end of the first tube 100 elastically contract to make the rubber ring 300 elastically deform, the shape and number of the strip groove 120 are not limited herein.

The utility model also provides an engine which comprises an engine main body, wherein the engine main body is provided with an air inlet, and the air inlet is provided with a pipe body connecting structure. This body connection structure's concrete structure refers to above-mentioned embodiment, because this engine has adopted all technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer repeated here.

The air intake system of the engine is an important component of the engine, and the main function of the air intake system is to convey clean, dry, sufficient and stable air for the engine so as to meet the requirement of the engine and avoid abnormal abrasion of the engine caused by impurities and large-particle dust in the air entering a combustion chamber of the engine. Another important function of the intake system is noise reduction, which affects not only the vehicle passing noise but also the vehicle interior noise, which has a great influence on ride comfort.

Referring to fig. 1 and 2, in the present embodiment, the first pipe 100 may be an intake silencer, the second pipe 200 may be a turbocharger, and the intake port of the engine main body is an intake corrugated pipe 600, so that the intake corrugated pipe 600, the intake silencer cover 500, the intake silencer, the rubber ring 300, and the turbocharger are sequentially connected, wherein the intake silencer, the rubber ring 300, and the turbocharger are fixedly connected by a clamp 400, so that the engine intake pipeline can be hermetically connected to meet the intake requirement of the engine. Compared with the conventional connection mode of the worm hoop, the use of one hoop is reduced, on one hand, the assembly cost is reduced, on the other hand, only one hoop needs to be tightened, the process is simple, the operation is convenient, and the assembly efficiency is improved. The turbocharger is nested in the structure of the opening end of the air inlet silencer, so that the integral pipe body connecting structure is more compact, the required assembly space is smaller, and the assembly requirement when the assembly space is limited can be met.

The first tube 100 may also be other common plastic tubes, and may be applied to other tube joints of an engine, such as a crankcase ventilation duct, a vacuum duct, etc.

The utility model further provides an automobile which comprises the pipe body connecting structure or the engine. This body connection structure and engine's concrete structure refer to above-mentioned embodiment, because this car has adopted all technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

The pipe body connecting structure can also be used for other pipe body connecting parts of automobiles, such as washing pipelines and the like. In a car washing system, the function of a washing pipeline is very important as the only path for conveying washing liquid, and the reliability of the washing pipeline is related to whether the whole washing system can work normally or not. In the prior art, the washing pipeline is arranged by dividing the pipeline into a plurality of sections and then connecting two adjacent sections of the pipeline by using a joint, but the method needs a large operation space. Compared with the existing connection mode of the washing pipeline, the use of one hoop is reduced, on one hand, the assembly cost is reduced, on the other hand, only one hoop needs to be tightened, the process is simple, the operation is convenient, and the assembly efficiency is improved. Meanwhile, the integral pipe body connecting structure is more compact, the required assembly space is smaller, and the assembly requirement when the assembly space is limited can be met.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A pipe connecting structure, comprising:

the opening end of the first pipe body is provided with a special-shaped groove;

the second pipe body is nested in the open end of the first pipe body;

the sealing ring is clamped between the first pipe body and the second pipe body, a limiting bolt is arranged on the outer wall of the sealing ring, and the limiting bolt is clamped with the special-shaped groove; and

the clamp is sleeved on the outer wall of the opening end of the first pipe body, so that the first pipe body, the sealing ring and the second pipe body are fixed together.

2. The pipe body connecting structure according to claim 1, wherein the irregularly-shaped groove is provided with an insertion section and a clamping section which are communicated with each other, the insertion section extends in an axial direction of the first pipe body, the clamping section extends in a circumferential direction of the first pipe body, and the stopper is slid into the irregularly-shaped groove along the insertion section and fixed to the clamping section.

3. The pipe connecting structure according to claim 1, wherein an outer sealing rib is further protruded on an outer wall of the seal ring contacting the first pipe, and the outer sealing rib is in sealing abutment with an inner wall surface of the first pipe.

4. The tubular body connecting structure according to claim 1, wherein an inner seal rib is further projected on an inner wall of the seal ring, and the inner seal rib is sealingly abutted against an outer wall surface of the second tubular body.

5. The pipe connecting structure according to claim 1, wherein the sealing ring further forms a limiting boss, and the limiting boss is exposed from the open end of the first pipe and abuts against an end face of the open end of the first pipe.

6. The pipe connection structure according to claim 1, wherein the first pipe body is further provided at an open end thereof with a plurality of strip-shaped grooves that are open in an axial direction thereof, and the strip-shaped grooves and the profile grooves are arranged at intervals in a circumferential direction of the open end of the first pipe body.

7. A tubular body connecting structure as claimed in claim 1, wherein the clip is provided with a notch, and the stopper pin is engaged with the groove and is protruded from the notch.

8. The pipe connection structure according to claim 7, wherein a stopper is further formed on the stopper, and the stopper passes through the notch and performs a stopper stop on a side of the clip facing away from the first pipe.

9. An engine, characterized by comprising an engine main body, wherein an air inlet is arranged on the engine main body, and the air inlet is provided with a pipe body connecting structure according to any one of claims 1 to 8.

10. An automobile comprising the pipe body connection structure of any one of claims 1 to 8 or the engine of claim 9.

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