CN112228200B

CN112228200B - Engine exhaust device

Info

Publication number: CN112228200B
Application number: CN202011433853.6A
Authority: CN
Inventors: 沈法鹏; 曹海琳; 孙秋云
Original assignee: Shandong Transport Vocational College
Current assignee: Changchun Xinli Seal Products Co ltd; Dragon Totem Technology Hefei Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-03-12
Anticipated expiration: 2040-12-10
Also published as: CN112228200A

Abstract

The invention provides an engine exhaust device, which comprises an exhaust pipe connected with an engine, wherein the exhaust pipe is detachably connected with a silencing pipe, the silencing pipe is provided with two end plates, the two end plates are detachably connected with an upper shell and a lower shell, a plurality of air outlet holes are formed in the part of the silencing pipe between the two end plates, the part of the silencing pipe between the two end plates is rotatably connected with two turntables, each turntable is connected with a plurality of glass fiber installation seats, a plurality of glass fibers are arranged between the front glass fiber installation seat and the rear glass fiber installation seat, the turntables are provided with gear rings, each end plate is provided with a fixed pipe, one end of each fixed pipe, which is positioned on the inner side of the end plate, is provided with a plurality of fixed teeth, the fixed pipes are rotatably connected with a rotating shaft, the rotating shaft is provided with a gear, a plurality of movable teeth are arranged on the. The invention has the advantages that: the whole silencer does not need to be replaced, and the use and maintenance cost of the vehicle is reduced.

Description

Engine exhaust device

Technical Field

The invention relates to the technical field of engine equipment, in particular to an engine exhaust device.

Background

The engine exhaust device comprises an exhaust pipe connected with the engine, the exhaust pipe is connected with a silencer, the silencer is detachably mounted on a vehicle, a three-way catalyst and other equipment are further mounted on the exhaust pipe, and exhaust gas generated by the engine enters the silencer through the exhaust pipe and is finally discharged. The existing silencer comprises a silencing pipe, a shell is connected to the silencing pipe in a welding mode, glass fibers are filled in the shell, a plurality of air outlet holes are formed in the silencing pipe, waste gas enters a cavity formed by the shell through the air outlet holes, energy is consumed under the action of the glass fibers, and the silencing effect is achieved.

The above technical solution has the following disadvantages: after long-time use, the glass fiber filled in the shell can be broken and then enters the silencing pipe through the air outlet, and light people are sprayed out of the silencing pipe along with waste gas, so that the glass fiber filled in the shell is reduced, and the silencing effect is reduced; the serious patient blocks the silencing pipe, so that the exhaust of the engine is not smooth, and the normal work of the engine is influenced. Therefore, frequent maintenance is required.

However, because the silencing pipe and the shell are welded together, the glass fiber filled in the shell cannot be replaced independently, and only the whole silencer can be replaced, so that the operation is troublesome, and the use and maintenance cost of the vehicle is high.

Disclosure of Invention

The invention aims to overcome the defects of the traditional technology and provide the engine exhaust device, which realizes the independent replacement of glass fiber without replacing the whole silencer.

The aim of the invention is achieved by the following technical measures: an engine exhaust device comprises an exhaust pipe connected with an engine, wherein the exhaust pipe is detachably connected with a silencing pipe, two end plates arranged along the front and back directions are arranged outside the silencing pipe, the two end plates are detachably connected with an upper shell positioned above the silencing pipe and a lower shell positioned below the silencing pipe, a plurality of air outlet holes are formed in the part of the silencing pipe positioned between the two end plates, two turntables arranged along the front and back directions are rotatably connected to the part of the silencing pipe positioned between the two end plates, each turntable is detachably connected with a plurality of glass fiber installation seats, a plurality of glass fibers are arranged between the glass fiber installation seat positioned in the front and the glass fiber installation seat positioned in the back, a gear ring is arranged on the inner side of each turntable, and a fixing pipe which is axially arranged along the end plates and penetrates through the end plates is arranged on each end plate, the fixed pipe is located the inboard one end of end plate and is equipped with a plurality of fixed teeth, the fixed intraductal internal rotation that is connected with the pivot, be equipped with in the pivot can with the gear ring engaged with gear, be equipped with a plurality of can with fixed tooth matched with movable tooth on the gear, be equipped with resetting means between pivot and the end plate.

As an improvement: the one end that the pivot is located the end plate outside is equipped with the kicking block, set up on the kicking block with spanner matched with spanner handle hole, resetting means is including cup jointing the epaxial spring of pivot, spring one end offsets with the kicking block, the spring other end offsets with fixed pipe.

As an improvement: the one end threaded connection that the solid fixed tube is located the end plate outside has the spiral cover, set up on the spiral cover and hold the spanner via hole that the spanner passes through, the spiral cover inboard is equipped with the ball, the ball offsets with the kicking block.

As an improvement: the rotary disc is characterized in that a first annular groove is formed in the outer side of the rotary disc, a second annular groove corresponding to the first groove is formed in the inner side of the end plate, a coil spring is arranged in a cavity formed by the first groove and the second groove, one end of the coil spring is connected with the rotary disc, and the other end of the coil spring is connected with the end plate.

As an improvement: and a third annular groove is formed in the outer side of the rotary table, and the gear ring and the gear are located in the third groove.

As an improvement: the inner side of the turntable is provided with a plurality of guide rails arranged along the radial direction of the turntable, the glass fiber mounting seat is provided with guide grooves corresponding to the guide rails, and the inner sides of the upper shell and the lower shell are provided with pressing sheets for pressing the glass fiber mounting seat.

As an improvement: the glass fiber mounting seat is characterized in that a frame is arranged on the edge of the inner side of the glass fiber mounting seat, the end part of the glass fiber is located on the inner side of the frame, and a filler for fixing the glass fiber is arranged on the inner side of the frame.

As an improvement: the upper shell is connected with the upper part of the end plate through an upper screw, the lower shell is connected with the lower part of the end plate through a lower screw, and a sealing ring is arranged between the end plate and the upper shell as well as between the end plate and the lower shell; the improved sealing structure is characterized in that upper edge strips are arranged on the left side and the right side of the upper shell respectively, lower edge strips are arranged on the left side and the right side of the lower shell respectively, the upper edge strips are connected with the lower edge strips through bolt and nut structures, sealing plates are arranged between the upper edge strips and the lower edge strips, and the sealing plates and the sealing rings are designed in an integrated mode.

As an improvement: the silencer is characterized in that a sleeve is arranged at the front end of the silencer, the inner diameter of the sleeve is larger than that of the silencer, an insertion pipe is arranged at the rear end of the exhaust pipe, the outer diameter of the insertion pipe is smaller than that of the silencer, a thermal expansion ring located in the sleeve is sleeved on the exhaust pipe, and a thermal expansion ring mounting groove used for containing the thermal expansion ring is formed in the exhaust pipe.

As an improvement: the exhaust pipe is characterized in that a conical inclined part is arranged at the rear end of the exhaust pipe, a gasket is arranged between the inclined part and the sleeve, and a guide chamfer is arranged on the inner side of the front end of the sleeve.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the advantages that: when glass fiber needs to be replaced, the silencing pipe is detached from the exhaust pipe, the upper shell and the lower shell are detached, the old glass fiber mounting seat is detached, the new glass fiber mounting seat is mounted, operation is convenient, the whole silencer does not need to be replaced, and vehicle use and maintenance cost is reduced.

The invention is further described with reference to the following figures and detailed description.

Drawings

FIG. 1 is a schematic diagram of an engine exhaust system according to the present invention.

FIG. 2 is a side view of an engine exhaust system according to the present invention.

Fig. 3 is a schematic view of the internal structure of an engine exhaust system according to the present invention.

Fig. 4 is a schematic structural view of a portion a in fig. 3.

Fig. 5 is a schematic structural view of a portion B in fig. 3.

Fig. 6 is a schematic structural view of a use state of a part B in fig. 3.

Fig. 7 is a schematic view of the structure of section C-C in fig. 5.

FIG. 8 is a schematic structural diagram of a turntable in an engine exhaust system according to the present invention.

Fig. 9 is a schematic structural view of section D-D in fig. 3.

Fig. 10 is a schematic structural view of section E-E in fig. 3.

FIG. 11 is a schematic structural view of section F-F in FIG. 3.

FIG. 12 is a schematic view of section G-G of FIG. 3.

Fig. 13 is a schematic structural view of a portion H in fig. 3.

In the figure; 1-an exhaust pipe; 2-a silencing pipe; 3-sleeving a pipe; 4-upper shell; 5-a lower shell; 6-screwing; 7-lower screw; 8-edging; 9-lower edge strips; 10-bolt and nut structure; 11-a sealing plate; 12-a stationary tube; 13-screwing a cover; 14-air outlet holes; 15-an end plate; 16-glass fibers; 17-a sealing ring; 18-wrench via holes; 19-tabletting; 20-wrench operating hole; 21-a top block; 22-a ball bearing; 23-a spring; 24-a rotating shaft; 25-fixed teeth; 26-moving teeth; 27-a gear; 28-gear ring; 29-a turntable; 30-a glass fiber mount; 31-a bearing; 32-a first groove; 33-coil springs; 34-a second groove; 35-a guide groove; 36-a guide rail; 37-a filler; 38-a frame; 39-third groove; 40-cannula; 41-a gasket; 42-an inclined portion; 43-thermal expansion loop; 44-thermal expansion ring mounting groove; 45-guiding chamfer.

Detailed Description

Example (c); as shown in fig. 1, 2 and 3, an engine exhaust device comprises an exhaust pipe 1 connected with an engine, wherein the exhaust pipe 1 is detachably connected with a silencing pipe 2, exhaust generated by the engine enters the silencing pipe 2 through the exhaust pipe 1 and is finally exhausted, and the temperature of exhaust exhausted by an existing automobile exhaust pipe is generally between 300 ℃ and 350 ℃.

Two end plates 15 arranged in the front-back direction are arranged outside the silencing pipe 2, preferably, the end plates 15 are circular, and the inner edge of each end plate 15 is fixedly connected with the silencing pipe 2 in a welding mode. Two end plates 15 are connected with epitheca 4 that is located hush pipe 2 top and inferior valve 5 that is located hush pipe 2 below through detachable mode, install the connection structure who is used for being connected with the automobile body on epitheca 4, connection structure adopts prior art, and it is not repeated here.

Specifically, the cross section of the upper shell 4 is arc-shaped, and the upper shell 4 is connected with the upper part of the end plate 15 through an upper screw 6; the cross section of the lower shell 5 is arc-shaped, the lower shell 5 is connected with the lower part of the end plate 15 through a lower screw 7, a sealing ring 17 is arranged between the end plate 15 and the upper shell 4 and between the end plate and the lower shell 5, preferably, the sealing ring 17 is made of silica gel, and can resist high temperature of more than 350 ℃, so that the sealing effect is ensured; the left side and the right side of the upper shell 4 are respectively provided with an upper edge strip 8, the left side and the right side of the lower shell 5 are respectively provided with a lower edge strip 9, the upper edge strip 8 and the lower edge strip 9 are connected through a bolt and nut structure 10, a sealing plate 11 is arranged between the upper edge strip 8 and the lower edge strip 9, and preferably, the sealing plate 11 is made of silica gel, is resistant to high temperature of more than 350 ℃, and ensures the sealing effect; the sealing plate 11 and the sealing ring 17 are integrally designed, so that gaps are reduced, and the sealing effect is guaranteed.

The part of the silencing pipe 2 between the two end plates 15 is provided with a plurality of air outlet holes 14, and the waste gas enters a cavity formed by the upper shell 4 and the lower shell 5 through the air outlet holes 14. The part of the silencing pipe 2 between the two end plates 15 is rotatably connected with two rotating discs 29 arranged along the front-back direction, the rotating discs 29 are circular, and a bearing 31 is arranged between the inner edge of each rotating disc 29 and the silencing pipe 2.

As shown in fig. 4, 5 and 6, each of the turntables 29 is detachably connected with a plurality of glass fiber installation seats 30, a plurality of glass fibers 16 are arranged between the glass fiber installation seats 30 located in front and the glass fiber installation seats 30 located in rear, a gear ring 28 is arranged on the inner side of each of the turntables 29, a fixing pipe 12 is arranged on each of the end plates 15 along the axial direction of the end plate 15 and penetrates through the end plate 15, a plurality of fixing teeth 25 are arranged at one end of the fixing pipe 12 located on the inner side of the end plate 15, a rotating shaft 24 is rotatably connected to the fixing pipe 12, and a seal arrangement is adopted between the rotating shaft 24 and the fixing pipe 12. Be equipped with on the pivot 24 can with ring gear 28 engaged with gear 27, be equipped with on the gear 27 a plurality of can with fixed tooth 25 matched with movable tooth 26, a side and the fixed pipe 12 axial direction of fixed tooth 25 parallels, a side slope setting of fixed tooth 25, a side and the fixed pipe 12 axial direction of movable tooth 26 parallels, a side slope setting of fixed tooth 25 makes things convenient for movable tooth 26 to rotate along a direction, hinders movable tooth 26 antiport, plays the effect of non return, be equipped with resetting means between pivot 24 and the end plate 15.

When in use, firstly, a plurality of glass fiber mounting seats 30 are arranged on the turntable 29; then, the rotating shaft 24 is pushed, the rotating shaft 24 moves inwards, the movable teeth 26 are separated from the fixed teeth 25, at the moment, the rotating shaft 24 is rotated to drive the gear 27 to rotate, and further the gear ring 28 and the rotary table 29 are driven to rotate, preferably, from the viewing angle observed from back to front, the rotary table 29 in the front moves clockwise, the rotary table 29 in the rear moves anticlockwise, the glass fibers 16 are pulled together, the glass fibers 16 are tensioned and gathered together, the compactness is improved, and the noise reduction effect is improved; finally, the rotating shaft 24 is pulled, the rotating shaft 24 moves outwards, and the movable teeth 26 are re-meshed with the fixed teeth 25, so that the gear 27 is prevented from rotating.

After the glass fiber 16 is installed, the upper shell 4 and the lower shell 5 are installed, and the silencing pipe 2 and the exhaust pipe 1 are connected together, so that the exhaust pipe can be normally used.

When the degree of tension of the glass fiber 16 needs to be finely adjusted, the rotating shaft 24 is directly rotated, and the reset device always applies an outward force to the rotating shaft 24 to prevent the gear 27 from rotating.

When the glass fiber 16 needs to be replaced, the silencing pipe 2 is detached from the exhaust pipe 1, the upper shell 4 and the lower shell 5 are detached, the old glass fiber mounting seat 30 is detached, and the new glass fiber mounting seat 30 is mounted according to the steps, so that the operation is convenient.

The one end that pivot 24 is located the end plate 15 outside is equipped with kicking block 21, set up on the kicking block 21 with spanner matched with spanner handle hole 20, the preferred, the spanner adopts interior hexagonal spanner, spanner handle hole 20 is hexagonal hole, resetting means is including cup jointing the spring 23 in pivot 24, spring 23 one end offsets with kicking block 21, the spring 23 other end offsets with fixed pipe 12.

When the gear rotating shaft device is used, an operator operates the rotating shaft 24 by using a wrench, the operation is convenient and labor-saving, the spring 23 always applies outward force to the rotating shaft 24, and the gear 27 is prevented from rotating.

The diameter that the fixed pipe 12 is located the end plate 15 outside portion is greater than the diameter of the other parts of fixed pipe 12, the one end threaded connection that the fixed pipe 12 is located the end plate 15 outside has spiral cover 13, set up the spanner via hole 18 that holds the spanner and pass through on the spiral cover 13, spiral cover 13 inboard is equipped with ball 22, ball 22 offsets with kicking block 21. The balls 22 are rotatably connected to the inner side of the cap 13 for reducing the friction between the cap 13 and the top block 21, which is implemented in the prior art and will not be described herein.

When the wrench is used, the rotary cover 13 is rotated, the rotary cover 13 pushes the rotary shaft 24 to move inwards, an operator only needs to rotate the wrench, extra effort is not needed to push the rotary shaft 24, and the wrench is convenient to operate; after the operation is finished, the rotary cover 13 is rotated reversely, and the rotary shaft 24 is returned under the action of the spring 23.

As shown in fig. 3, 4, 5, 6, 7, 8, 9 and 10, a plurality of T-shaped guide rails 36 are arranged along the radial direction of the turntable 29, T-shaped guide grooves 35 corresponding to the guide rails 36 are formed on the glass fiber mounting seat 30, and pressing pieces 19 for pressing the glass fiber mounting seat 30 are arranged on the inner sides of the upper shell 4 and the lower shell 5.

When the glass fiber installation seat is used, the T-shaped guide groove 35 is aligned with the T-shaped guide rail 36, the glass fiber installation seat 30 is installed, the inner side of the glass fiber installation seat 30 abuts against the silencing pipe 2, the outer side of the glass fiber installation seat 30 abuts against the pressing sheet 19, and firmness of the rotary table 29 and the glass fiber installation seat 30 is improved.

The inboard edge of glass fiber mount pad 30 is equipped with frame 38, glass fiber 16 tip is located frame 38 inboard, frame 38 inboard is equipped with the filler 37 that is used for fixed glass fiber 16, filler 37 adopts high temperature resistant inorganic glue, like 8812 series of the production of the glue industry of the Hui Rui of Dongguan city, it adopts prior art, no longer describes here.

As shown in fig. 3, 4, 5, 6, 11 and 12, an annular first groove 32 is formed in the outer side of the turntable 29, an annular second groove 34 corresponding to the first groove 32 and formed in the inner side of the end plate 15 is formed in the inner side of the turntable, a coil spring 33 is disposed in a cavity formed by the first groove 32 and the second groove 34, one end of the coil spring 33 is connected with the turntable 29, and the other end of the coil spring 33 is connected with the end plate 15.

When the glass fiber tensioning device is used, the coil spring 33 drives the turntable 29 positioned in the front to move clockwise, the turntable 29 positioned in the rear to move anticlockwise, the tensioning force of the glass fibers 16 is kept, and meanwhile, the coil spring is positioned in a cavity formed by the first groove 32 and the second groove 34, so that the space is saved.

An annular third groove 39 is formed in the outer side of the rotating disc 29, and the gear ring 28 and the gear 27 are located in the third groove 39.

When in use, the gear ring 28 and the gear 27 are positioned in the third groove 39, so that the space is saved.

As shown in fig. 1, 2 and 13, a sleeve 3 is disposed at the front end of the muffler pipe 2, the inner diameter of the sleeve 3 is larger than the inner diameter of the muffler pipe 2, an insertion pipe 40 is disposed at the rear end of the exhaust pipe 1, the outer diameter of the insertion pipe 40 is smaller than the inner diameter of the muffler pipe 2, a thermal expansion ring 43 located in the sleeve 3 is sleeved on the exhaust pipe 1, preferably, the thermal expansion ring 43 is made of aluminum, and a thermal expansion ring mounting groove 44 for accommodating the thermal expansion ring 43 is formed on the exhaust pipe 1.

When the exhaust muffler is used, the insertion pipe 40 is inserted into the muffler pipe 2, and when exhaust gas passes through the insertion pipe, the thermal expansion ring 43 is heated to expand to seal a gap between the muffler pipe 2 and the exhaust pipe 1, so that gas leakage is reduced.

Blast pipe 1 rear end is equipped with and is conical rake 42, be equipped with packing ring 41 between rake 42 and the sleeve pipe 3, it is preferred, packing ring 41 is made by silica gel, and its high temperature resistant more than 350 degrees guarantee sealed effect, sleeve pipe 3 front end inboard is equipped with direction chamfer 45.

When the silencer is used, the insertion pipe 40 is inserted into the silencing pipe 2, and the gasket 41 seals a gap between the silencing pipe 2 and the exhaust pipe 1 to reduce air leakage.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. An engine exhaust apparatus comprising an exhaust pipe (1) connected to an engine, characterized in that: the exhaust pipe (1) is connected with a silencing pipe (2) in a detachable mode, two end plates (15) arranged along the front-back direction are arranged outside the silencing pipe (2), the two end plates (15) are connected with an upper shell (4) positioned above the silencing pipe (2) and a lower shell (5) positioned below the silencing pipe (2) in a detachable mode, a plurality of air outlet holes (14) are formed in the part of the silencing pipe (2) positioned between the two end plates (15), two rotary tables (29) arranged along the front-back direction are rotatably connected to the part of the silencing pipe (2) positioned between the two end plates (15), a plurality of glass fiber mounting seats (30) are connected to each rotary table (29) in a detachable mode, and a plurality of glass fibers (16) are arranged between the glass fiber mounting seats (30) positioned in the front and the glass fiber mounting seats (30) positioned in the rear, carousel (29) inboard is equipped with ring gear (28), is equipped with on every end plate (15) along end plate (15) axial setting, and passes fixed pipe (12) of end plate (15), the one end that fixed pipe (12) are located end plate (15) inboard is equipped with a plurality of fixed teeth (25), fixed pipe (12) internal rotation is connected with pivot (24), be equipped with on pivot (24) can with ring gear (28) engaged with gear (27), be equipped with on gear (27) a plurality of can with fixed tooth (25) matched with movable tooth (26), be equipped with resetting means between pivot (24) and end plate (15).

2. The engine exhaust apparatus according to claim 1, characterized in that: the one end that pivot (24) are located end plate (15) outside is equipped with kicking block (21), set up on kicking block (21) with spanner matched with spanner handle hole (20), resetting means is including cup jointing spring (23) on pivot (24), spring (23) one end offsets with kicking block (21), the spring (23) other end offsets with fixed pipe (12).

3. The engine exhaust apparatus according to claim 2, characterized in that: the one end threaded connection that solid fixed tube (12) are located end plate (15) outside has spiral cover (13), offer on spiral cover (13) and hold spanner via hole (18) that the spanner passes through, spiral cover (13) inboard is equipped with ball (22), ball (22) offset with kicking block (21).

4. The engine exhaust apparatus according to claim 1, characterized in that: the outer side of the rotary disc (29) is provided with a first annular groove (32), the inner side of the end plate (15) is provided with a second annular groove (34) corresponding to the first annular groove (32), a coil spring (33) is arranged in a cavity formed by the first annular groove (32) and the second annular groove (34), one end of the coil spring (33) is connected with the rotary disc (29), and the other end of the coil spring (33) is connected with the end plate (15).

5. The engine exhaust apparatus according to claim 1, characterized in that: and a third annular groove (39) is formed in the outer side of the turntable (29), and the gear ring (28) and the gear (27) are positioned in the third groove (39).

6. The engine exhaust apparatus according to any one of claims 1 to 5, characterized in that: the inner side of the rotary table (29) is provided with a plurality of guide rails (36) which are arranged along the radial direction of the rotary table, the glass fiber mounting seat (30) is provided with a guide groove (35) corresponding to the guide rails (36), and the inner sides of the upper shell (4) and the lower shell (5) are provided with pressing sheets (19) used for pressing the glass fiber mounting seat (30).

7. The engine exhaust apparatus according to claim 6, characterized in that: the glass fiber mounting seat is characterized in that a frame (38) is arranged on the edge of the inner side of the glass fiber mounting seat (30), the end part of the glass fiber (16) is located on the inner side of the frame (38), and a filler (37) used for fixing the glass fiber (16) is arranged on the inner side of the frame (38).

8. The engine exhaust apparatus according to any one of claims 1 to 5, characterized in that: the upper shell (4) is connected with the upper part of the end plate (15) through an upper screw (6), the lower shell (5) is connected with the lower part of the end plate (15) through a lower screw (7), and a sealing ring (17) is arranged between the end plate (15) and the upper shell (4) and between the end plate and the lower shell (5); go up shell (4) the left and right sides and respectively be equipped with strake (8), inferior valve (5) the strip left and right sides respectively is equipped with down strake (9), go up strake (8) and be connected through bolt and nut structure (10) between strake (9) down, go up strake (8) and be equipped with closing plate (11) down between strake (9), closing plate (11) and sealing washer (17) adopt the integrated design.

9. The engine exhaust apparatus according to any one of claims 1 to 5, characterized in that: the utility model discloses a silencer, including muffler pipe (2), blast pipe (1), blast pipe (2) front end, the internal diameter of sleeve pipe (3) is greater than the internal diameter of muffler pipe (2), blast pipe (1) rear end is equipped with intubate (40), the external diameter of intubate (40) is less than the internal diameter of muffler pipe (2), thermal expansion ring (43) that are located sleeve pipe (3) have been cup jointed on blast pipe (1), offer thermal expansion ring mounting groove (44) that are used for holding thermal expansion ring (43) on blast pipe (1).

10. The engine exhaust apparatus according to claim 9, characterized in that: the exhaust pipe is characterized in that a conical inclined part (42) is arranged at the rear end of the exhaust pipe (1), a gasket (41) is arranged between the inclined part (42) and the sleeve (3), and a guide chamfer (45) is arranged on the inner side of the front end of the sleeve (3).