CN207261091U - Vehicle and silencer sealing structure - Google Patents
Vehicle and silencer sealing structure Download PDFInfo
- Publication number
- CN207261091U CN207261091U CN201720867030.1U CN201720867030U CN207261091U CN 207261091 U CN207261091 U CN 207261091U CN 201720867030 U CN201720867030 U CN 201720867030U CN 207261091 U CN207261091 U CN 207261091U
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- silencer
- sealing
- sealing shroud
- compression boss
- baffle ring
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Abstract
The utility model provides a kind of silencer sealing structure,There is the downtake pipe and second exhaust pipe being connected with each other in silencer,The tube inlet of second exhaust pipe is arranged to mounting ball bowl structure,Mounting ball bowl is embraced on the tube inlet of downtake pipe,Sealing shroud is set between mounting ball bowl and downtake pipe,The outside of sealing shroud is pushed against by the baffle ring being arranged on downtake pipe,In order to avoid producing the leakage of tail gas between sealing shroud and baffle ring,In the pressure side surface of the two, compression boss structure is set,Compression boss protrude from the pressure side surface of baffle ring and sealing shroud,Therefore crimp is produced to sealing shroud by compression boss during compression,Improve thrust of the sealing shroud in compression boss position,Sealing shroud produces deformation in compression boss position,So as to avoid the exhaust gas leak problem for causing the pressure side surface of the two gap generation occur due to foozle.The utility model additionally provides a kind of vehicle with above-mentioned silencer sealing structure.
Description
Technical field
Silencer technical field is the utility model is related to, more specifically to a kind of vehicle and silencer sealing structure.
Background technology
Common silencer passes through ball bowl and the set connection of ball bowl graphite grazing, graphite grazing set position in exhaust pipe link position
In in ball bowl, pushed against by baffle ring, the end of baffle ring and graphite grazing set pushes against, and in tail gas exhaust process, tail gas is close to graphite
Big envelope is extruded, and there are graphite grazing to cover deformation deficiency, it is impossible to seal clearance caused by foozle is compensated, so as to cause to leak
Gas phenomenon, seriously pollutes air.
Therefore, the leakage problem of silencer sealing structure how is avoided, is that current those skilled in the art are urgently to be resolved hurrily
Problem.
Utility model content
In view of this, the utility model provides a kind of silencer sealing structure, to avoid the leakage of silencer sealing structure
Gas problem；The utility model additionally provides a kind of vehicle.
In order to achieve the above object, the utility model provides following technical solution：
A kind of silencer sealing structure, includes the downtake pipe and second exhaust pipe of pipeline connection, the second exhaust
The tube inlet of pipe sets the mounting ball bowl embraced in the pipe outlet loaded on the downtake pipe；
Be provided with the sealing shroud being set in the first exhaust pipe outer wall in the mounting ball bowl, the sealing shroud it is outer
End face and the inner wall of the mounting ball bowl offset；
It is further sleeved with the baffle ring to offset with the side end face of the sealing shroud on the downtake pipe, the baffle ring and described
The compression boss that compression fit is carried out to the end face of the two are provided between sealing shroud.
Preferably, in above-mentioned silencer sealing structure, the compression boss are arranged on the sealing shroud, the compression
Boss is the ring compression boss around sealing shroud circumferential direction.
Preferably, in above-mentioned silencer sealing structure, the compression boss are arranged at the sealing shroud and the baffle ring
The middle part of the end face of compression fit.
Preferably, in above-mentioned silencer sealing structure, the compression boss are arranged at the middle part of the sealing shroud, described
Baffle ring and the storage tank that the accommodating compression boss are offered on the end face of the sealing shroud compression fit.
Preferably, in above-mentioned silencer sealing structure, the compression boss are arranged on the baffle ring, and the compression is convex
Platform is arranged at the middle part that the baffle ring compresses planar end surface with the sealing shroud.
Preferably, in above-mentioned silencer sealing structure, the compression boss are arranged at the baffle ring close to described
On the inner ring end face of one exhaust pipe, the inner side end of the compression boss and the outer wall of the downtake pipe offset, described close
The root that big envelope compresses side with the baffle ring is crimped in the end face outside of the compression boss.
Preferably, in above-mentioned silencer sealing structure, the end face outsides of the compression boss is along its axial cross section
For taper seal face.
Preferably, in above-mentioned silencer sealing structure, it is set with the first connecting plate on the downtake pipe, described
The inner ring of one connecting plate on the outside of the baffle ring with offseting；It is set with the second connecting plate on the second exhaust pipe, described second
The inner ring of connecting plate and the outer wall of the mounting ball bowl offset；Further include and connect first connecting plate and second connecting plate
Locking device.
Preferably, in above-mentioned silencer sealing structure, the locking device includes connecting first connecting plate and institute
State the connecting pole of the second connecting plate, the clamping end of the connecting pole be arranged at second connecting plate outer end face offset it is spacing
Ear, the locking end of the connecting pole are stretched out the outer end face of first connecting plate, are set and the company on first connecting plate
The locking nut of male screw cooperation is connect, one end is further sleeved with the connecting pole and the outer end face of second connecting plate offsets,
The holddown spring that one end offsets with the position-limiting ear.
A kind of vehicle, it is silencer to be provided with exhaust emissions pipeline and be arranged on the exhaust emissions pipeline, institute
Stating silencer has the as above silencer sealing structure described in any one.
Silencer sealing structure provided by the utility model, includes the downtake pipe and second exhaust pipe of pipeline connection,
The tube inlet of second exhaust pipe sets the mounting ball bowl embraced in the pipe outlet loaded on downtake pipe；Set is provided with mounting ball bowl
Loaded on the sealing shroud in first exhaust pipe outer wall, the inner wall of the outer end face and mounting ball bowl of sealing shroud offsets；On downtake pipe
The baffle ring to offset with the side end face of sealing shroud is further sleeved with, is provided between baffle ring and sealing shroud and the end face of the two is compressed
The compression boss of cooperation.Exhaust pipe in silencer needs to ensure the leakproofness of pipeline link position in exhaust process, in phase
The downtake pipe and second exhaust pipe to connect, the tube inlet of second exhaust pipe are arranged to mounting ball bowl structure, mounting ball bowl
Embrace on the tube inlet of downtake pipe, sealing shroud be set between mounting ball bowl and downtake pipe, the inner side of sealing shroud by
The inner wall of mounting ball bowl pushes against, and the outside of sealing shroud is pushed against by the baffle ring being arranged on downtake pipe, and baffle ring is to sealing shroud
Outer side compression, sealing shroud is limited between mounting ball bowl and the outer wall of downtake pipe, in order to avoid sealing shroud and baffle ring it
Between produce the leakage of tail gas, compression boss structure is set in the pressure side surface of the two, compression boss protrude from baffle ring and sealing shroud
Pressure side surface, therefore during compression by compression boss to sealing shroud produce crimp, improve sealing shroud compressing
The thrust of lug boss position, sealing shroud produces deformation in compression boss position, so as to avoid since foozle causes the two
There is the exhaust gas leak problem of gap generation in pressure side surface.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the first structure figure of silencer sealing structure provided by the utility model；
Fig. 2 is the partial enlarged view at A in Fig. 1；
Fig. 3 is the second structure diagram of silencer sealing structure provided by the utility model；
Fig. 4 is the partial enlarged view at B in Fig. 3；
Fig. 5 is the 3rd structure diagram of silencer sealing structure provided by the utility model；
Fig. 6 is the partial enlarged view at C in Fig. 5；
Fig. 7 is the 3rd structure diagram of silencer sealing structure provided by the utility model；
Fig. 8 is the partial enlarged view at D in Fig. 7.
Embodiment
The utility model discloses a kind of silencer sealing structure, the leakage problem of silencer sealing structure is avoided；This
Utility model additionally provides a kind of vehicle.
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clear, complete description, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Embodiment based on the utility model, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
As depicted in figs. 1 and 2, Fig. 1 is the first structure figure of silencer sealing structure provided by the utility model；Fig. 2 is
Partial enlarged view in Fig. 1 at A.
The utility model provides a kind of silencer sealing structure, includes the downtake pipe 1 and second row of pipeline connection
Tracheae 2, the tube inlet of second exhaust pipe 2 set the mounting ball bowl 21 embraced in the pipe outlet loaded on downtake pipe 1；Mounting ball bowl
The sealing shroud 3 being set on 1 outer wall of downtake pipe, the outer end face of sealing shroud 3 and the inner wall of mounting ball bowl 21 are provided with 21
Offset；The baffle ring 4 to offset with the side end face of sealing shroud 3 is further sleeved with downtake pipe 1, is set between baffle ring 4 and sealing shroud 3
There are the compression boss 5 that compression fit is carried out to the end face of the two.
Exhaust pipe in silencer needs to ensure the leakproofness of pipeline link position in exhaust process, in interconnection
Downtake pipe 1 and second exhaust pipe 2,2 tube inlet of second exhaust pipe are arranged to 21 structure of mounting ball bowl, and mounting ball bowl 21, which is embraced, to be set
In on the tube inlet of downtake pipe 1, sealing shroud 3, the inner side of sealing shroud 3 are set between mounting ball bowl 21 and downtake pipe 1
Top surface is pushed against by the inner wall of mounting ball bowl 21, and the outside of sealing shroud 21 is pushed against by the baffle ring 4 being arranged on downtake pipe 1, is kept off
The outer side compression of 4 pairs of sealing shrouds 3 is enclosed, sealing shroud 3 is limited between the outer wall of mounting ball bowl 21 and downtake pipe 1, in order to
Avoid producing the leakage of tail gas between sealing shroud 3 and baffle ring 4, compression boss structure is set in the pressure side surface of the two, is compressed convex
Platform 5 protrudes from the pressure side surface of baffle ring 4 and sealing shroud 3, therefore sealing shroud 3 is produced by compression boss 5 during compression
Crimp, improves thrust of the sealing shroud 3 in 5 position of compression boss, and sealing shroud 3 produces deformation in 5 position of compression boss, from
And avoid the exhaust gas leak problem for avoiding the pressure side surface of the two from gap generation occur due to foozle.
In one specific embodiment of this case, compression boss 5 are arranged on sealing shroud 3, and compression boss 5 are around sealing shroud 3
Circumferential ring compression boss.Sealing shroud 3 is the sealing shroud of graphite material, and sealing shroud 3 is flexible material, and baffle ring 4 is metal material
Matter, due to producing error so that the end face of baffle ring 4 and the end face outside of sealing shroud 3 cannot be guaranteed absolute plane, therefore
Stress is produced in compaction process, in inevitable generation pressure side surface to disperse, and gap is formed, by the way that compression boss 5 are arranged on
On sealing shroud 3, compression boss 5 protrude from the pressure side surface of sealing shroud 3, and compression boss 5 are provided around sealing shroud 3 one and are enclosed
Ring compression boss, since baffle ring 4 causes the compression of compression boss 5 compression boss 5 to produce deformation, baffle ring 4 and sealing shroud 3
Gap is produced in 5 position of compression boss, the deformation yet with compression boss increases the compressive stres of baffle ring and sealing shroud, with
Baffle ring forms tight seal, compensate for the gap produced due to foozle, and realize exhausted between compression boss and baffle ring
To sealing, the ability of anti-leak is improved.
In one specific embodiment of this case, compression boss 5 are arranged in the end face of sealing shroud 3 and 4 compression fit of baffle ring
Portion.Compression boss 5 cause sealing shroud 3 in ring around sealing shroud 3 and the middle part of 4 pressure side surface of baffle ring, 5 compressive deformation of compression boss
5 position of shape boss produces deformation so that the contact area between baffle ring 4 and sealing shroud 3 diminishes, but the deformation of sealing shroud 3 increases
The big contact stress of the two, is arranged at middle part so that the structure that baffle ring is located at 5 both sides of compression boss produces deformation, avoids
Unilateral deformation quantity deficiency is difficult to ensure that sealing effect.
As shown in Figure 3 and Figure 4, Fig. 3 is the second structure diagram of silencer sealing structure provided by the utility model；Figure
4 be the partial enlarged view at B in Fig. 3.
In one specific embodiment of this case, compression boss 35 are arranged at the middle part of sealing shroud 33, baffle ring 34 and sealing shroud 33
The storage tank 341 of accommodating compression boss 35 is offered on the end face of compression fit.In order to ensure between sealing shroud 33 and baffle ring 34
Enough contacts area, open up what is coordinated with compression boss 35 in the pressure side surface of baffle ring 34, around 34 1 weeks house of baffle ring
Groove 341, compression boss 35 are dropped into storage tank 341, and compression boss 35 compress deformation in storage tank, compression boss 35 it is outer
Wall is compressed with the inner wall of storage tank 341 and is bonded, and is further ensured that the sealing effect of the two, while set and coordinate with compression boss 35
Storage tank 341, can as far as possible reduce 33 seal face of 34 seal face of baffle ring and sealing shroud between gap so that sealing shroud 33 is located at
The pressure side surface of 35 both sides of compression boss is fallen on baffle ring, that is, increases the compressive stres of compression boss position, and cause sealing
Set is compressed with baffle ring and is bonded.
As shown in Figure 5 and Figure 6, Fig. 5 is the 3rd structure diagram of silencer sealing structure provided by the utility model；Figure
6 be the partial enlarged view at C in Fig. 5.
In one specific embodiment of this case, compression boss 55 are arranged on baffle ring 54, and compression boss 55 are arranged at baffle ring 54
The middle part of planar end surface is compressed with sealing shroud 53.Compression boss 55 are located on baffle ring 54, to protrude from the hard knot of 54 end face of baffle ring
Structure, with 53 compaction process of sealing shroud, compression boss 55 compress sealing shroud 53 and 55 correspondence position of compression boss so that close
The end face of big envelope 53 is squeezed and internally deforms, and increase compression boss 55 are to the compressive stres of 53 end face of sealing shroud, compensation sealing
The seal clearance that set is produced by foozle, reaches sealing effect.
As shown in Figure 7 and Figure 8, Fig. 7 is the 3rd structure diagram of silencer sealing structure provided by the utility model；Figure
8 be the partial enlarged view at D in Fig. 7.
In one specific embodiment of this case, compression boss 75 are arranged at baffle ring 74 close to the inner ring end of downtake pipe 71
On face, the outer wall of the inner side end and downtake pipe 71 of compression boss 75 offsets, and sealing shroud 73 compresses side with baffle ring 74
Root is crimped in the end face outside of compression boss 75.Compression boss 75 are arranged at the pressure side surface of baffle ring 74, and along baffle ring 74
Pressure side surface stretched out to its compaction direction, the outer wall of the inner side end and downtake pipe 71 of compression boss 75 offsets, sealing
When set 73 is compressed with baffle ring 74, its inner side end being set on downtake pipe 71 is jacked up by compression boss 75 so that sealing
The root of the pressure side surface of set 73 is tilted along the guiding of compression boss 75, and the end face outside of compression boss 75 is crimped onto after tilting
On, since compression boss 75 are squeezed into the root of sealing shroud 73 so that sealing shroud 73 is in the root wedge angle position of its pressure side surface
Deform upon, improve extrusion stress of the sealing shroud 73 in its root, pass through extruding of the compression boss 75 to 73 root of sealing shroud
Deformation, increases the sealing compactness of baffle ring 74 and sealing shroud 73, and then improves the sealing effect of baffle ring and sealing shroud.
Preferably, the end face outside of compression boss 75 is taper seal face along its axial cross section.Compression boss 75
Pyramidal structure, when it is assembled with sealing shroud 73, the tip of compression boss 75 is inserted into the root of sealing shroud 73, sealing shroud
73 are oriented to generation taper deformation along the taper of compression boss 75 so that and the two produces deformation in root, is further ensured that leakproofness,
And reduce the compression difficulty of compression boss 75 and sealing shroud 73.
In one specific embodiment of this case, as depicted in figs. 1 and 2, the first connecting plate 6 is set with downtake pipe 1, the
The outside of the inner ring and baffle ring 4 of one connecting plate 6 offsets；The second connecting plate 7 is set with second exhaust pipe 2, the second connecting plate 7
The outer wall of inner ring and mounting ball bowl 201 offsets；Further include the locking device of the first connecting plate 6 of connection and the second connecting plate 7.In order to
Ensure being stably connected with for downtake pipe 1 and second exhaust pipe 2, the first connecting plate 6, second row are set with downtake pipe 1
The second connecting plate 7 is set with tracheae 2, is connected as one the first connecting plate 6 and the second connecting plate 7 by locking device, realization pair
The connection of downtake pipe 1 and second exhaust pipe 2.Baffle ring 4 is pushed against by the inner side of the first connecting plate 6, promotes baffle ring 4 to be pressed to close
On big envelope 3, the inner arm of the second connecting plate 6 and the outer wall of the mounting ball bowl 201 of second exhaust pipe 2 offset, due to second exhaust pipe 2
Contact jaw with mounting ball bowl 201 is variable-diameter structure, after the second 7 sets of connecting plate is attached on second exhaust pipe 2, by mounting ball bowl
The spacing realization of 201 outer wall is to the spacing of second exhaust pipe 2.
In one specific embodiment of this case, locking device includes the connecting pole of the first connecting plate 6 of connection and the second connecting plate 7
8, the clamping end of connecting pole 8 is arranged at the position-limiting ear 9 that the outer end face of the second connecting plate 7 offsets, and the locking end of connecting pole 8 stretches out the
The outer end face of one connecting plate 6, the locking nut 11 with 8 thread fitting of connecting pole is set on the first connecting plate 6.First connecting plate 6
Connection with the second connecting plate 7 realizes that connecting pole 8 passes through the first connecting plate 6 and the second connecting plate 7, second by connecting pole 8
The outside of connecting plate 7, connecting pole 8, to its clamping, in the outside of the first connecting plate 6, are installed by position-limiting ear 9 by locking nut 11
Onto connecting pole 8, locking nut 11 locks the end face outside of the first connecting plate 6.
In one specific embodiment of this case, one end is further sleeved with connecting pole 8 and the outer end face of the second connecting plate 7 offsets,
The holddown spring 10 that one end offsets with position-limiting ear 9.Due to the vibratility of vehicle in the process of moving, to downtake pipe 1 and
The link position of two exhaust pipes 2 produces elasticity bounce, in order to avoid connecting pole 8 is connected in downtake pipe 1 and second exhaust pipe 2
Both ends disengaged because of bounce, holddown spring 10 is set with connecting pole 8, holddown spring 10 is arranged at connecting pole 8 positioned at second
Between the outside of connecting plate 7 and position-limiting ear 9, in hopping process, 10 deformation process of holddown spring changes the first connecting plate 6 and second
The distance of connecting plate 7, avoids downtake pipe 1 and second exhaust pipe 2 from being disengaged after fixed structure loosens, while holddown spring
10 ensure that and provide baffle ring 4 enough extruding forces, and then ensure that the sealing effect to sealing shroud.
Based on the silencer sealing structure provided in above-described embodiment, the utility model additionally provides a kind of vehicle, thereon
It is silencer to be provided with exhaust emissions pipeline and be arranged on exhaust emissions pipeline, and the silencer which is equipped with has above-mentioned
The silencer sealing structure provided in embodiment.
Since the vehicle employs the silencer sealing structure of above-described embodiment, so the vehicle is by silencer sealing structure
The beneficial effect brought refer to above-described embodiment.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (10)
- A kind of 1. silencer sealing structure, it is characterised in that downtake pipe and second exhaust pipe including pipeline connection, it is described The tube inlet of second exhaust pipe sets the mounting ball bowl embraced in the pipe outlet loaded on the downtake pipe；The sealing shroud being set in the first exhaust pipe outer wall, the outer end face of the sealing shroud are provided with the mounting ball bowl Offset with the inner wall of the mounting ball bowl；The baffle ring to offset with the side end face of the sealing shroud, the baffle ring and the sealing are further sleeved with the downtake pipe The compression boss that compression fit is carried out to the end face of the two are provided between set.
- 2. silencer sealing structure according to claim 1, it is characterised in that the compression boss are arranged at the sealing Put on, the compression boss are the ring compression boss around sealing shroud circumferential direction.
- 3. silencer sealing structure according to claim 2, it is characterised in that the compression boss are arranged at the sealing Set and the middle part of the end face of the baffle ring compression fit.
- 4. silencer sealing structure according to claim 1, it is characterised in that the compression boss are arranged at the sealing The middle part of set, the baffle ring and the storage tank that the accommodating compression boss are offered on the end face of the sealing shroud compression fit.
- 5. silencer sealing structure according to claim 1, it is characterised in that the compression boss are arranged at the baffle ring On, the compression boss are arranged at the middle part that the baffle ring compresses planar end surface with the sealing shroud.
- 6. silencer sealing structure according to claim 1, it is characterised in that the compression boss are arranged at the baffle ring Close on the inner ring end face of the downtake pipe, the outer wall of the inner side end of the compression boss and the downtake pipe Offset, the root that the sealing shroud compresses side with the baffle ring is crimped in the end face outside of the compression boss.
- 7. silencer sealing structure according to claim 6, it is characterised in that the end face outside of the compression boss along its Axial cross section is taper seal face.
- 8. silencer sealing structure according to claim 1, it is characterised in that be set with first on the downtake pipe Connecting plate, the inner ring of first connecting plate on the outside of the baffle ring with offseting；The second company is set with the second exhaust pipe Fishplate bar, the inner ring of second connecting plate and the outer wall of the mounting ball bowl offset；Further include connection first connecting plate and The locking device of second connecting plate.
- 9. silencer sealing structure according to claim 8, it is characterised in that the locking device includes connecting described the The connecting pole of one connecting plate and second connecting plate, the clamping end of the connecting pole are arranged at the outer end of second connecting plate The position-limiting ear that face offsets, the locking end of the connecting pole stretch out the outer end face of first connecting plate, on first connecting plate Locking nut with the connecting pole thread fitting is set, one end and second connecting plate are further sleeved with the connecting pole Outer end face offsets, the holddown spring that one end offsets with the position-limiting ear.
- 10. a kind of vehicle, is provided with exhaust emissions pipeline and the silencer being arranged on the exhaust emissions pipeline, it is special Sign is that the silencer has the silencer sealing structure as described in any one in claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720867030.1U CN207261091U (en) | 2017-07-17 | 2017-07-17 | Vehicle and silencer sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720867030.1U CN207261091U (en) | 2017-07-17 | 2017-07-17 | Vehicle and silencer sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207261091U true CN207261091U (en) | 2018-04-20 |
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ID=61927068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720867030.1U Active CN207261091U (en) | 2017-07-17 | 2017-07-17 | Vehicle and silencer sealing structure |
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| Country | Link |
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| CN (1) | CN207261091U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757137A (en) * | 2018-08-01 | 2018-11-06 | 广西玉柴机器股份有限公司 | The sealing structure of segmented exhaust system |
-
2017
- 2017-07-17 CN CN201720867030.1U patent/CN207261091U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757137A (en) * | 2018-08-01 | 2018-11-06 | 广西玉柴机器股份有限公司 | The sealing structure of segmented exhaust system |
| CN108757137B (en) * | 2018-08-01 | 2020-02-21 | 广西玉柴机器股份有限公司 | Sealing structure of sectional type exhaust system |
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