Motorcycle exhaust emission mechanism

Abstract

The invention discloses a motorcycle exhaust emission mechanism. The motorcycle exhaust emission mechanism comprises an exhaust pipe and a silencing assembly. The silencing assembly is internally provided with a shell, a silencing piece, a cover body and an adjusting assembly. The tail gas pushes the blocking piece, the retaining blocking piece pushes the pushing piece to compress the first spring, and the retaining sliding piece is pushed by the first spring to enter the barrel. The motorcycle exhaust emission mechanism is compact in structure and ingenious in design. The cover body and the shell are connected without bolts, the attractive effect is improved, and meanwhile, the situation that noise reduction of the noise reduction assembly is affected due to disassembly by non-professionals can be avoided through the limiting effect between the guide block and the maintaining piece. Meanwhile, the size of a gap between the blocking piece and the inner wall of the fourth outer cover can be changed according to the vehicle speed and the generated waste gas pressure, and therefore the exhaust sound and the exhaust flow are automatically adjusted.

Description

Technical Field

[0001] The invention relates to motorcycle exhaust technology, in particular to a motorcycle tail gas emission mechanism. Background Art

[0002] The exhaust gas of motorcycles mainly relies on the muffler, which is a device that allows airflow to pass through and attenuates noise. It is one of the important parts of motorcycles. The performance of the muffler not only affects the size of the motorcycle noise, but also has a great impact on the power, fuel consumption, torque and other performance of the engine. Most of the existing motorcycle mufflers are not well designed in structure and cannot reasonably and effectively absorb the exhaust gas and corresponding noise discharged by the engine, resulting in a large operating noise of the muffler. At the same time, if the cover at the rear end of the muffler is fixed with bolts, it will affect the appearance and make it difficult for non-professionals to disassemble and modify it, affecting the normal function of the muffler. If a welded integrated structure is used, the inside of the muffler cannot be cleaned in time in the later stage, resulting in the inside being blocked by carbon deposits, sludge, etc. and losing the muffler effect. Summary of the invention

[0003] In order to solve the defects of the prior art mentioned above, the present invention proposes a motorcycle exhaust emission mechanism.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A motorcycle exhaust emission mechanism, characterized by comprising:

[0006] An exhaust pipe, wherein the interior of the exhaust pipe is hollowed out to form an exhaust passage,

[0007] A silencer assembly connected to an exhaust pipe, the silencer assembly comprising:

[0008] The shell is hollowed out to form an exhaust chamber, one end of the exhaust chamber is open, and the shell is provided with symmetrical mounting grooves, a retainer is provided in the mounting groove, and the middle of the retainer is arranged in the mounting groove by a bolt.

[0009] A cover body is arranged at the opening of the exhaust chamber, the cover body is provided with a guide groove corresponding to the mounting groove, a symmetrical guide block is arranged in the guide groove, a retaining opening matched with the retaining member is arranged in the middle of the guide block, and the cover body is installed in the housing through the matching of the retaining opening and the retaining member.

[0010] And a silencer is arranged in the exhaust chamber, and the silencer is composed of a first outer cover, a second outer cover, a third outer cover and a fourth outer cover from the outside to the inside.

[0011] In the present invention, a first expansion chamber is formed between the first outer cover and the second outer cover, a second expansion chamber is formed between the second outer cover and the third outer cover, a third expansion chamber is formed between the third outer cover and the fourth outer cover, a buffer chamber connected to the exhaust duct is formed in the fourth outer cover, and a plurality of small holes are provided on the first outer cover, the second outer cover, the third outer cover and the fourth outer cover. The small holes on the first outer cover and the third outer cover are in the same direction and are located at one end close to the exhaust pipe, and the small holes on the second outer cover and the fourth outer cover are in the same direction and are located at one end away from the exhaust pipe.

[0012] In the present invention, the retaining member is composed of a spiral segment and a first elastic arm and a second elastic arm arranged at both ends of the spiral segment. The first elastic arm and the second elastic arm have the same structure, and vertically arranged extension arms are provided on the first elastic arm and the second elastic arm.

[0013] In the present invention, an elastic area is formed between the first elastic arm and the second elastic arm, and the first elastic arm and the second elastic arm are composed of a horizontal section and a deformation section, and the horizontal section and the deformation section are connected by an arc section, and the deformation section is inclined toward the elastic area, and the deformation section is inclined toward the extension arm.

[0014] In the present invention, a guide channel is formed between the guide blocks, and the guide blocks are provided with a first guide slope, a second guide slope, a first horizontal plane and a second horizontal plane. The maximum distance between the first guide slopes is h1, the minimum distance between the second guide slopes is h2, the distance between the extension arms is h3, h1>h3>h2, the first horizontal plane is set away from the guide channel, and the second horizontal plane is set close to the guide channel.

[0015] In the present invention, the retaining port is arranged on the second horizontal plane, the retaining port is inclined, the inclination angle of the retaining port is equal to the inclination angle of the second guide slope, the guide groove is provided with a blocking surface and a symmetrical side wall surface, a first channel is formed between the blocking surface and the guide block, and a second channel is formed between the side wall surface and the first horizontal plane.

[0016] In the present invention, a strip groove and a sliding groove symmetrically arranged at the strip groove are provided in the guide channel, the sliding groove is connected to the first through hole, a limit block is provided in the guide channel, the limit block is arranged at the symmetrical retaining mouth, and the lower end of the limit block is provided with a sliding block that cooperates with the sliding groove.

[0017] In the present invention, a positioning rod is further provided on the limit block, a second spring is sleeved on the positioning rod, a recess connected to the guide groove is further provided on the cover body, a receiving hole for receiving the second spring is provided in the recess, the recess is used to accommodate the limit block entering therein, and an unlocking port is provided on the limit block.

[0018] In the present invention, an adjustment component is provided in the buffer chamber, and a first fixing member, a second fixing member, a sliding member, a blocking member, a pushing member and a cylinder are provided in the adjustment component. The cylinder is connected to the second fixing member, and the pushing member is arranged on the first fixing member. The blocking member is symmetrically arranged. A symmetrical hinge seat is provided on the first fixing member. The lower end of the blocking member is hingedly connected to the hinge seat through a first hinge shaft, and the pushing member and the blocking member are hingedly connected through a hinge rod. The sliding member is arranged in the cylinder, and the first fixing member is contacted and connected with the sliding member in the middle, and a first spring is provided at the contact point. The exhaust gas pushes the blocking member, and the blocking member pushes the pushing member, compresses the first spring, and keeps the sliding member pushed into the cylinder by the first spring.

[0019] In the present invention, the sliding member is provided with a through hole, a rotationally symmetrically arranged friction member is provided in the through hole, the friction members are hingedly connected by a third hinge shaft, a third spring is also provided between the friction members, a sliding chamber for accommodating the sliding member is provided inside the cylinder, friction surfaces cooperating with the friction member are formed upper and lower in the sliding chamber, symmetrical positioning blocks are provided on the sliding member, and a positioning groove cooperating with the positioning block is provided in the sliding chamber.

[0020] The motorcycle exhaust emission mechanism of the present invention has the following beneficial effects: the motorcycle exhaust emission mechanism has a compact structure and an ingenious design. The connection between the cover body and the housing does not require bolts, thereby improving the aesthetic effect. At the same time, the limiting effect between the guide block and the retaining member can prevent the disassembly of the silencer assembly by non-professionals from affecting the silencer. At the same time, the size of the gap between the blocking member and the inner wall of the fourth outer cover can be changed according to the size of the vehicle speed and the exhaust gas pressure generated, thereby realizing automatic adjustment of the exhaust sound and exhaust flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the motorcycle exhaust emission mechanism of the present invention;

[0022] Figure 2 for Figure 1 A top view of a cross section;

[0023] Figure 3 for Figure 1 Exploded diagram of

[0024] Figure 4 for Figure 3 A perspective view of the shell structure in FIG.

[0025] Figure 5 for Figure 3 A schematic diagram of the retaining member and the cover structure;

[0026] Figure 6for Figure 5 A top view of

[0027] Figure 7 for Figure 6 The cross-sectional view at AA in FIG.

[0028] Figure 8 for Figure 5 Schematic diagram of the cover structure;

[0029] Fig. 9 for Figure 6 Schematic diagram of the limit block and the second spring structure;

[0030] Fig.10 for Figure 6 A schematic diagram of the retaining member structure;

[0031] Fig.11 for Fig.10 The main view;

[0032] Fig.12 for Figure 3 Exhaust pipe and muffler structure cross-section diagram;

[0033] Fig.13 It is a schematic diagram of the structure of the regulating component in the present invention;

[0034] Fig.14 for Fig.13 The main view;

[0035] Fig.15 for Fig.12 A top view of a cross section;

[0036] Fig.16 for Fig.13 An exploded view of the structure of the sliding member, the cylinder and the second fixing member;

[0037] Fig.17 for Fig.16 Schematic diagram of the friction member and the third spring structure;

[0038] Fig.18 for Fig.17 Right view of;

[0039] Fig.19 for Fig.16 The perspective view of the cylinder structure in

[0040] Fig. 20 It is a schematic diagram of the installation state of the disassembly component and the cover body in the present invention.

[0041] In the figure: exhaust pipe 1, silencer assembly 2, exhaust duct 3, silencer 4, fourth outer cover 5, shell 6, cover 7, adjustment assembly 8, blocking member 9, flow hole 10, exhaust chamber 11, mounting groove 12, retaining member 13, bolt 14, spiral section 15, first elastic arm 16, second elastic arm 17, extension arm 18, fixing hole 19, elastic area 20, guide block 21, first guide slope 22, horizontal section 23, deformation section 24, arc section 25, second guide Inclined guide surface 26, first through hole 27, disc 28, second through hole 29, guide groove 30, guide channel 31, retaining port 32, first horizontal plane 33, second horizontal plane 34, stopper 35, blocking surface 36, side wall surface 37, first channel 38, second channel 39, strip groove 40, sliding groove 41, sliding block 42, positioning rod 43, second spring 44, notch 45, accommodating hole 46, unlocking port 47, disassembly member 48, first rod body 49, second rod body 50, guide slope 51, first outer cover 52, second outer cover 53, third outer cover 54, first expansion chamber 55, second expansion chamber 56, third expansion chamber 57, buffer chamber 58, small hole 59, first fixing member 60, second fixing member 61, sliding member 62, pushing member 63, cylinder 64, hinge seat 65, first hinge shaft 66, hinge rod 67, second hinge shaft 68, fourth hinge shaft 69, first hinge groove 70, second hinge groove 71, first elastic member Spring 72, plate body 73, first connecting block 74, cylinder 75, disk body 76, second connecting block 77, sliding area 78, sliding hole 79, limiting rod 80, through hole 81, friction member 82, third hinge shaft 83, third spring 84, sliding chamber 85, friction surface 86, positioning block 87, positioning groove 88, friction end 89, hinged end 90, arc surface 91, contact surface 92, chamfered surface 93, fixing rod 94, fourth spring 95, fourth expansion chamber 96. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0043] like Figures 1 to 20 As shown, the motorcycle exhaust emission mechanism of the present invention includes an exhaust pipe 1 and a silencer assembly 2, one end of the exhaust pipe 1 is connected to the silencer assembly 2, and the other end is connected to the engine. The exhaust gas generated by the engine enters the silencer assembly 2 through the exhaust pipe 1 to be silenced, and then is discharged to the outside through the silencer assembly 2.

[0044] The interior of the exhaust pipe 1 is hollowed out to form an exhaust passage 3 , and the exhaust passage 3 is connected to an internal fourth outer cover 5 of the muffler 4 .

[0045] The silencer assembly 2 is connected to the exhaust pipe 1, and the silencer assembly 2 includes a housing 6, a cover 7, a silencer 4, and an adjustment assembly 8. The housing 6 is used to wrap the silencer 4 and the cover 7, and the adjustment assembly 8 is arranged inside the silencer 4 to achieve the blocking of the exhaust gas. When the pressure of the exhaust gas reaches a certain pressure value, the exhaust gas at this time can push the blocking member 9 in the adjustment assembly 8 to rotate. When the blocking member 9 rotates, the upper end of the blocking member 9 is kept from contacting the inner wall of the fourth outer cover 5, thereby increasing the gap between the inside of the fourth outer cover 5 and the blocking member 9, allowing more exhaust gas to pass through, thereby reducing the exhaust gas pressure value from the exhaust pipe 1. The generation of exhaust gas is related to the speed of the motorcycle itself. When the speed is low, the exhaust gas generated by the motorcycle engine at this time is less, and its flow rate and pressure are both small, so the air pressure of the exhaust gas is not enough to push the blocking member 9, but it can pass through the flow hole 10 on the blocking member 9.

[0046] The housing 6 is hollowed out to form an exhaust chamber 11, one end of which is open, and the open end is used to install the cover 7. A symmetrical installation groove 12 is provided inside the housing 6, and a retainer 13 is provided in the installation groove 12. The middle of the retainer 13 is set in the installation groove 12 through a bolt 14.

[0047] The retainer 13 is composed of a spiral section 15 and a first elastic arm 16 and a second elastic arm 17 arranged at both ends of the spiral section 15. The first elastic arm 16 and the second elastic arm 17 have the same structure, and a vertically arranged extension arm 18 is provided on the first elastic arm 16 and the second elastic arm 17. A fixing hole 19 is formed in the middle of the spiral section 15, and the bolt 14 is installed in the mounting groove 12 through the fixing hole 19 to fix the retainer 13. The first elastic arm 16 and the second elastic arm 17 are at the same horizontal height, so that the lengths of the extension arms 18 on the first elastic arm 16 and the second elastic arm 17 are consistent.

[0048] An elastic region 20 is formed between the first elastic arm 16 and the second elastic arm 17 . When the first elastic arm 16 and the second elastic arm 17 are guided by the first guide slope 22 on the guide block 21 , the first elastic arm 16 and the second elastic arm 17 are deformed into the elastic region 20 , so that the elastic region 20 is reduced.

[0049] The first elastic arm 16 and the second elastic arm 17 are composed of a horizontal section 23 and a deformation section 24. The horizontal section 23 and the deformation section 24 are connected by an arc section 25. The deformation section 24 is inclined toward the elastic area 20. The deformation section 24 is inclined toward the extension arm 18, so that the extension arm 18 can be used in conjunction with the first guide slope 22 and the second guide slope 26.

[0050] The cover body 7 is arranged at the opening of the exhaust chamber 11 . A first through hole 27 is arranged in the middle of the cover body 7 . A disc 28 is arranged in the first through hole 27 . A second through hole 29 is arranged in the middle of the disc 28 . The exhaust chamber 11 is connected to the outside through the second through hole 29 .

[0051] The cover body 7 is provided with a guide groove 30 corresponding to the installation groove 12, and a symmetrical guide block 21 is provided in the guide groove 30. A guide channel 31 is formed between the guide blocks 21 and the guide blocks 21. A retaining opening 32 that cooperates with the retaining member 13 is provided in the middle of the guide block 21. The cover body 7 is installed in the housing 6 through the cooperation of the retaining opening 32 and the retaining member 13.

[0052] The guide block 21 is provided with a first guide slope 22, a second guide slope 26, a first horizontal plane 33 and a second horizontal plane 34. The maximum distance between the first guide slopes 22 is h1, the minimum distance between the second guide slopes 26 is h2, the distance between the extension arms 18 and the extension arms 18 is h3, h1>h3>h2, the first horizontal plane 33 is arranged away from the guide channel 31, and the second horizontal plane 34 is arranged close to the guide channel 31.

[0053] The extension arm 18 is guided by the first guiding slope 22 to deform into the elastic region 20 , while the second guiding slope 26 can push the extension arm 18 to open, thereby expanding the distance of the elastic region 20 .

[0054] The holding opening 32 is arranged on the second horizontal plane 34, and the holding opening 32 is arranged at an angle, and the angle of inclination of the holding opening 32 is equal to the angle of inclination of the second guiding inclined surface 26. The holding opening 32 is used to limit the position of the extension arm 18, so that when the extension arm 18 is squeezed by the first guiding inclined surface 22, when the extension arm 18 reaches the holding opening 32, it can automatically enter the holding opening 32 and be limited under the elastic force of the first elastic arm 16 and the second elastic arm 17. When the cover body 7 is further pushed toward the housing 6, the extension arm 18 will be blocked by the limit block 35, and the extension arm 18 cannot be moved closer to the middle elastic area 20, so that the cover body 7 cannot be taken out of the housing 6.

[0055] The guide groove 30 is provided with a blocking surface 36 and a symmetrical side wall surface 37. A first channel 38 is formed between the blocking surface 36 and the guide block 21, and a second channel 39 is formed between the side wall surface 37 and the first horizontal plane 33. The first channel 38 is the position of the first elastic arm 16 and the second elastic arm 17 after crossing the guide channel 31. When the extension arm 18 reaches the first channel 38, it will not be restricted by the second horizontal plane 34 and will automatically reset. When the cover body 7 is disassembled, the cover body 7 is pulled, so after the extension arm 18 reaches the first channel 38, it will contact the extension arm 18 through the second guide slope 26 on the guide block 21, guiding the extension arm 18 to open and enter the second channel 39.

[0056] In addition, a strip groove 40 and a sliding groove 41 symmetrically arranged at the strip groove 40 are provided in the guide channel 31, the sliding groove 41 is connected to the first through hole 27, a limit block 35 is provided in the guide channel 31, the limit block 35 is arranged at the symmetrical retaining opening 32, and a sliding block 42 cooperating with the sliding groove 41 is provided at the lower end of the limit block 35.

[0057] The limit block 35 is also provided with a positioning rod 43, on which a second spring 44 is sleeved. The cover body 7 is also provided with a recess 45 connected to the guide groove 30, in which a receiving hole 46 for receiving the second spring 44 is provided. The recess 45 is used to accommodate the limit block 35 entering therein, and an unlocking opening 47 is provided on the limit block 35.

[0058] When the cover 7 needs to be taken out from the housing 6, a disassembly member 48 is required. Figure 7 As shown, it is arranged in the shape of "7", and the disassembly member 48 is composed of a first rod body 49 and a second rod body 50, and the first rod body 49 and the second rod body 50 are arranged vertically. One end of the first rod body 49 is inserted obliquely into the first through hole 27, and then the first rod body 49 is placed in the strip groove 40, and the first rod body 49 is kept passing through the strip groove 40 and entering the unlocking opening 47 on the limit block 35, and then the disassembly member 48 is pulled, so that the disassembly member 48 pulls the limit block 35, compresses the second spring 44, and makes the limit block 35 enter the recess 45. Then, the cover body 7 is pushed toward the housing 6, so that the extension arm 18 reaches the first channel 38, opens under the elastic force of the first elastic arm 16 and the second elastic arm 17, and reaches the connection between the second channel 39 and the first channel 38, and then the cover body 7 can be pulled, so that the extension arm 18 passes through the second channel 39, and the cover body 7 can be taken out without being limited by the retaining member 13.

[0059] By using a special disassembly part 48 to remove the cover body 7, the carbon deposits inside the shell 6 can be cleaned, which can extend the service life of the muffler and improve the muffler effect.

[0060] At the same time, a guiding slope 51 is provided at the notch of the guiding groove 30, and the guiding slope 51 is used to guide the extension arm 18, so that the first elastic arm 16 and the second elastic arm 17 originally slightly tilted downward will change to a horizontal state under the guidance of the guiding slope 51, so that they can slide under force in the guiding groove 30 and reach the guiding channel 31.

[0061] When the first elastic arm 16 and the second elastic arm 17 reach the guide channel 31 , they can push the limit block 35 to compress the second spring 44 , and then reach the retaining opening 32 , automatically enter the retaining opening 32 to limit, and realize the installation of the cover body 7 .

[0062] When installing the cover body 7, it only needs to be installed by direct insertion. The first guiding slope 22 guides the extension arm 18 to enter the guide channel 31. The extension arm 18 pushes the limit block 35 to compress the second spring 44. Then, when it reaches the retaining opening 32, it can automatically enter the retaining opening 32 and be limited under the elastic force of the first elastic arm 16 and the second elastic arm 17.

[0063] When disassembling the cover 7, it is only necessary to insert the disassembly member 48 into the second passage 39, then pull the stop block 35, compress the second spring 44, so that the stop block 35 enters the recess 45, and then push the cover 7 until the extension arm 18 is blocked by the stop block 35 and cannot continue to push the cover 7 toward the housing 6, and finally pull the cover 7 to complete the disassembly of the cover 7. The connection between the cover 7 and the housing 6 does not require the bolt 14, which improves the aesthetic effect. At the same time, the limit effect between the guide block 21 and the retaining member 13 can prevent the disassembly by non-professionals from affecting the silencing of the silencer assembly 2.

[0064] The muffler 4 is arranged in the exhaust chamber 11, and the muffler 4 is composed of a first outer cover 52, a second outer cover 53, a third outer cover 54 and a fourth outer cover 5 from the outside to the inside. A first expansion chamber 55 is formed between the first outer cover 52 and the second outer cover 53, a second expansion chamber 56 is formed between the second outer cover 53 and the third outer cover 54, a third expansion chamber 57 is formed between the third outer cover 54 and the fourth outer cover 5, and a buffer chamber 58 connected to the exhaust duct 3 is formed in the fourth outer cover 5.

[0065] A plurality of small holes 59 are provided on the first outer cover 52, the second outer cover 53, the third outer cover 54 and the fourth outer cover 5, and the small holes 59 are used for gas communication between the outer covers. The small holes 59 on the first outer cover 52 and the third outer cover 54 are in the same direction and are located at one end close to the exhaust pipe 1, and the small holes 59 on the second outer cover 53 and the fourth outer cover 5 are in the same direction and are located at one end away from the exhaust pipe 1. A fourth expansion chamber 96 is formed between the first outer cover 52 and the shell 6.

[0066] The adjustment assembly 8 is arranged in the buffer chamber 58. The adjustment assembly 8 is provided with a first fixing member 60, a second fixing member 61, a sliding member 62, a blocking member 9, a pushing member 63 and a cylinder 64. The cylinder 64 is connected to the second fixing member 61. The pushing member 63 is arranged on the first fixing member 60. The blocking member 9 is symmetrically arranged. The first fixing member 60 is provided with a symmetrical hinge seat 65. The hinge seat 65 is provided with a first hinge shaft 66. The lower end of the blocking member 9 is hingedly connected to the hinge seat 65 through the first hinge shaft 66. The pushing member 63 is hingedly connected to the blocking member 9 through a hinge rod 67. One end of the hinge rod 67 is hingedly connected to the middle of the blocking member 9, and the other end is hingedly connected to one end of the pushing member 63. One end of the hinge rod 67 is hingedly connected to the blocking member 9 through a second hinge shaft 68, and the other end is hingedly connected to the pushing member 63 through a fourth hinge shaft 69. A first hinge groove 70 for accommodating the hinge rod 67 is provided on the blocking member 9 , and a second hinge groove 71 for accommodating the hinge rod 67 is provided on the pushing member 63 .

[0067] The sliding member 62 is arranged in the cylinder 64, the first fixing member 60 is in contact with the sliding member 62, and a first spring 72 is arranged at the contact point. The exhaust gas pushes the blocking member 9, and the blocking member 9 pushes the pushing member 63, compressing the first spring 72, and the sliding member 62 is pushed into the cylinder 64 by the first spring 72.

[0068] The first fixing member 60 is composed of a plate body 73 and a first connecting block 74. A cylinder 75 is further provided on the plate body 73. The cylinder 75 contacts the sliding member 62. The first spring 72 is provided on the cylinder 75. The first connecting block 74 is connected to the inner wall of the fourth outer cover 5.

[0069] The second fixing member 61 is composed of a disc 76 and a second connecting block 77, and the second connecting block 77 is connected to the inner wall of the fourth outer cover 5. The cross section of the fourth outer cover 5 is square, and the cross sections of the first outer cover 52, the second outer cover 53 and the third outer cover 54 are all circular.

[0070] The middle of the pusher 63 forms a sliding area 78, the plate body 73 is disposed in the sliding area 78, sliding holes 79 are disposed on both sides of the pusher 63, and a limiting rod 80 disposed in the sliding hole 79 is disposed on the plate body 73. When the blocking member 9 does not push the pusher 63, the limiting rod 80 is at an end away from the blocking member 9, and after the blocking member 9 pushes the pusher 63, the pusher 63 compresses the first spring 72, so that the limiting rod 80 reaches an end close to the blocking member 9.

[0071] The sliding member 62 contacts the cylinder 75 , compresses the first spring 72 through the pushing member 63 , and then the first spring 72 pushes the sliding member 62 into the cylinder 64 .

[0072] The sliding member 62 is provided with a through hole 81, and a friction member 82 is provided in the through hole 81 and is rotationally symmetrically arranged. The friction members 82 are hingedly connected by a third hinge shaft 83, and a third spring 84 is provided between the friction members 82. A sliding chamber 85 for accommodating the sliding member 62 is provided inside the cylinder 64, and friction surfaces 86 cooperating with the friction member 82 are formed on the upper and lower parts of the sliding chamber 85. The sliding member 62 is provided with symmetrical positioning blocks 87, and a positioning groove 88 cooperating with the positioning blocks 87 is provided in the sliding chamber 85.

[0073] The friction member 82 is used to generate friction force to prevent the blocking member 9 from being easily pushed by the exhaust gas. The friction member 82 is composed of a friction end 89 and a hinge end 90. The hinge end 90 on the friction member 82 is half the length of the friction end 89. The friction end 89 is provided with an arc surface 91 and a contact surface 92, and the sliding chamber 85 is provided with a rounded surface 93 that matches the arc surface 91. When the friction member 82 enters the sliding chamber 85, the contact surface 92 keeps in contact with the friction surface 86 in the sliding chamber 85 to generate friction force. At the same time, the friction member 82 compresses the third spring 84.

[0074] The sliding member 62 is provided with a symmetrically arranged fixing rod 94, and the fixing rod 94 is sleeved with a fourth spring 95, one end of the fourth spring 95 contacts the sliding member 62, and the other end contacts the second fixing member 61. The elastic force of the fourth spring 95 is greater than the elastic force of the first spring 72 and the third spring 84 plus the friction force between the friction member 82 and the friction surface 86. The fourth spring 95 can reset the blocking member 9, and only when the gas pressure of the exhaust gas is greater than a certain value can the friction force between the first spring 72, the third spring 84, the fourth spring 95 and the friction member 82 and the friction surface 86 be overcome, so that the blocking member 9 pushes the pushing member 63.

[0075] The size of the gap between the blocking member 9 and the inner wall of the fourth outer cover 5 can be changed according to the size of the vehicle speed and the exhaust gas pressure generated, thereby realizing automatic adjustment of the exhaust sound and the exhaust flow rate.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A motorcycle exhaust emission mechanism, characterized in that: include: An exhaust pipe, wherein the interior of the exhaust pipe is hollowed out to form an exhaust passage, A silencer assembly connected to an exhaust pipe, the silencer assembly comprising: The shell is hollowed out to form an exhaust chamber, one end of the exhaust chamber is open, and the shell is provided with symmetrical mounting grooves, a retainer is provided in the mounting groove, and the middle of the retainer is arranged in the mounting groove by a bolt. A cover body is arranged at the opening of the exhaust chamber, the cover body is provided with a guide groove corresponding to the mounting groove, a symmetrical guide block is arranged in the guide groove, a retaining opening matched with the retaining member is arranged in the middle of the guide block, and the cover body is installed in the housing through the matching of the retaining opening and the retaining member. And a silencer is arranged in the exhaust chamber, and the silencer is composed of a first outer cover, a second outer cover, a third outer cover and a fourth outer cover from the outside to the inside.

2. The motorcycle exhaust emission mechanism according to claim 1, characterized in that: A first expansion chamber is formed between the first outer cover and the second outer cover, a second expansion chamber is formed between the second outer cover and the third outer cover, a third expansion chamber is formed between the third outer cover and the fourth outer cover, a buffer chamber connected to the exhaust duct is formed in the fourth outer cover, and a plurality of small holes are provided on the first outer cover, the second outer cover, the third outer cover and the fourth outer cover. The small holes on the first outer cover and the third outer cover are in the same direction and are located at an end close to the exhaust pipe, and the small holes on the second outer cover and the fourth outer cover are in the same direction and are located at an end away from the exhaust pipe.

3. The motorcycle exhaust emission mechanism according to claim 1, characterized in that: The retaining member is composed of a spiral section and a first elastic arm and a second elastic arm arranged at both ends of the spiral section. The first elastic arm and the second elastic arm have the same structure, and vertically arranged extension arms are provided on the first elastic arm and the second elastic arm.

4. The motorcycle exhaust emission mechanism according to claim 3, characterized in that: An elastic area is formed between the first elastic arm and the second elastic arm. The first elastic arm and the second elastic arm are composed of a horizontal section and a deformation section. The horizontal section and the deformation section are connected by an arc section. The deformation section is inclined toward the elastic area, and the deformation section is inclined toward the extension arm.

5. The motorcycle exhaust emission mechanism according to claim 4, characterized in that: A guide channel is formed between the guide blocks, and the guide blocks are provided with a first guide slope, a second guide slope, a first horizontal plane and a second horizontal plane. The maximum distance between the first guide slopes is h1, the minimum distance between the second guide slopes is h2, the distance between the extension arms is h3, h1>h3>h2, the first horizontal plane is set away from the guide channel, and the second horizontal plane is set close to the guide channel.

6. The motorcycle exhaust emission mechanism according to claim 5, characterized in that: The retaining opening is arranged on the second horizontal plane, and the retaining opening is arranged at an inclination. The inclination angle of the retaining opening is equal to the inclination angle of the second guide slope. A blocking surface and a symmetrical side wall surface are provided in the guide groove. A first channel is formed between the blocking surface and the guide block, and a second channel is formed between the side wall surface and the first horizontal plane.

7. The motorcycle exhaust emission mechanism according to claim 6, characterized in that: The guide channel is provided with a strip groove and a sliding groove symmetrically arranged at the strip groove, the sliding groove is connected to the first through hole, the guide channel is provided with a limit block, the limit block is arranged at the symmetrical retaining opening, and the lower end of the limit block is provided with a sliding block that cooperates with the sliding groove.

8. The motorcycle exhaust emission mechanism according to claim 7, characterized in that: The limit block is also provided with a positioning rod, and a second spring is sleeved on the positioning rod. The cover body is also provided with a recess connected to the guide groove, and a receiving hole for receiving the second spring is provided in the recess. The recess is used to accommodate the limit block to enter therein, and an unlocking port is provided on the limit block.

9. The motorcycle exhaust emission mechanism according to claim 2, characterized in that: The buffer chamber is provided with an adjustment component, and the adjustment component is provided with a first fixing member, a second fixing member, a sliding member, a blocking member, a pushing member and a cylinder body. The cylinder body is connected to the second fixing member, and the pushing member is arranged on the first fixing member. The blocking member is symmetrically arranged, and a symmetrical hinge seat is provided on the first fixing member. The lower end of the blocking member is hingedly connected to the hinge seat through a first hinge shaft, and the pushing member and the blocking member are hingedly connected through a hinge rod. The sliding member is arranged in the cylinder body, and the first fixing member is contacted and connected with the sliding member in the middle, and a first spring is provided at the contact point. The exhaust gas pushes the blocking member, and the blocking member pushes the pushing member, compresses the first spring, and keeps the sliding member pushed into the cylinder body by the first spring.

10. The motorcycle exhaust emission mechanism according to claim 9, characterized in that: The sliding member is provided with a through hole, and a friction member arranged in rotational symmetry is provided in the through hole. The friction members are hingedly connected by a third hinge shaft, and a third spring is also provided between the friction members. A sliding chamber for accommodating the sliding member is provided inside the cylinder body, and friction surfaces cooperating with the friction member are formed above and below the sliding chamber. Symmetrical positioning blocks are provided on the sliding member, and a positioning groove cooperating with the positioning blocks is provided in the sliding chamber.

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