CN201103445Y - Layered heat-insulating motorcycle silencer - Google Patents

Abstract

The utility model relates to a layered and heat-insulation muffler of a motorcycle. A muffler tube is arranged in a muffler body; the front end of the muffler body is connected with a gas inlet tube through a forward acceptance sleeve and the rear end of the muffler body is connected with a liner through a backward acceptance sleeve; an outer cylinder is arranged outside the muffler body; the front and the rear ends of the outer cylinder are respectively connected with a front connector and a rear connector; an annular air convective cavity is generated between the outer cylinder and the muffler body and is communicated with an external environment through an air inlet and an air outlet on the top surface of the outer cylinder. The layered and heat-insulation muffler adopts a mode of combining heat insulation and flowing cooling of natural air so as to control the surface temperature of the outer cylinder of the muffler to be around 50 DEG C; therefore, a person can directly contact the outer cylinder of the muffler without scald, thus fundamentally eliminating the hidden safety troubles caused by the high temperature of the outer wall of the muffler. The layered and heat-insulation muffler is characterized by having a simple structure, being easy to be implemented and has strong generality, etc.

Description

Layered insulation motorcycle muffler

technical field

The utility model relates to a muffler, in particular to a layered heat-insulating muffler used on motorcycles.

Background technique

The structure of the traditional motorcycle muffler is as shown in Figure 4. A muffler pipe 4 is arranged in the muffler body 2, and the front joint sleeve 5 is set in the afterbody of the intake pipe 1, and the front joint sleeve 5 is welded with the front end of the muffler body 2; The front part of 3 is fitted with a back sleeve 6, which is welded with the rear end of the muffler 2. The high-temperature exhaust gas discharged from the running of the motorcycle engine enters the muffler body 2 from the intake pipe 1 of the muffler, and is discharged from the tailpipe 3 after being muffled by the muffler pipe 4 . Since the temperature of the exhaust gas generated by the engine operation is as high as 600-700°C, when the exhaust gas flows through the muffler 2, the heat of the high-temperature gas is directly transferred to the outer wall of the muffler 2, resulting in a high temperature of the outer wall of the muffler 2, about 300-300°C. 500°C, it is easy to cause burns, and there is a serious safety hazard; especially for off-road motorcycles, due to its own characteristics, the layout of the muffler is relatively high, close to the upper part of the car body, and the driver and passengers do not pay attention Just easily touch the outer wall of muffler body 2, the scalding accident that causes thereby happens from time to time.

Some motorcycles use the method of adding a protective plate to cover the muffler 2. Since the protective plate is a newly added part after the muffler is assembled on the motorcycle, the protective plate cannot completely cover the muffler 2 due to the limitation of the installation position. Covering, its protective effect is relatively poor, while destroying the overall aesthetic feeling of the motorcycle, the unshielded position of the muffler body 2 will still cause personnel to be scalded. In addition, a part of the protective plate is in contact with the outer wall of the muffler 2, resulting in a hot spot with a higher temperature on the protective plate, which is also likely to burn people.

Utility model content

The technical problem to be solved by the utility model is to provide a layered and heat-insulated motorcycle muffler that can effectively prevent personnel from being burned.

The technical scheme of the utility model is as follows: a layered heat-insulated motorcycle muffler, a muffler pipe is arranged in the muffler body, the front end of the muffler body is connected to the intake pipe through the front sleeve, and the rear end of the muffler body is connected to the rear end of the muffler body. The sleeve is connected with the tailpipe. The key is that an outer cylinder is arranged outside the muffler, and the front and rear ends of the outer cylinder are respectively connected with the front and rear sleeves. An annular air convection chamber is formed between them, and the air convection chamber communicates with the outside world through the air inlet on the bottom surface of the outer cylinder and the air outlet on the top surface of the outer cylinder.

Using the above technical scheme, an outer cylinder is arranged outside the muffler, and an air convection cavity is formed between the outer cylinder and the muffler, so that the high-temperature exhaust gas discharged from the motorcycle engine during operation enters the muffler from the intake pipe, and the high-temperature gas does not directly contact with the muffler. At the same time, the air enters the air convection chamber from the air inlet on the bottom of the outer cylinder, moves upward after being heated, and is discharged from the air outlet on the top surface of the outer cylinder, taking away most of the heat emitted by the outer wall of the muffler. Under the dual effects of layered heat insulation and air cooling, little heat is transferred to the outer cylinder, and the surface temperature of the outer cylinder is relatively low. Even if the human body directly touches the outer cylinder, it will not cause burns, thereby eliminating potential safety hazards.

The wall of the above-mentioned muffler is a sandwich structure, and a heat insulating body is installed in the sandwich. The heat insulating body can be selected from heat insulating cotton or other heat insulating materials, which is not only convenient to obtain materials, but also can further reduce the heat transferred to the outer cylinder.

The above-mentioned front connector is a cylinder structure with the open end facing forward. The bottom wall of the cylinder is set on the intake pipe and welded with the front end of the muffler. The side wall of the cylinder is fixed with the outer cylinder by rivets. A heat insulating ring is set on the rivet between the wall and the outer cylinder. The air intake pipe, the front sleeve and the muffler are fixed together by welding, and the three are connected reliably; a heat insulating ring is set between the front sleeve and the outer cylinder to prevent the heat from the front sleeve from being transferred to the outer cylinder.

A front decorative cap is set on the air intake pipe in front of the above-mentioned front adapter, the rear port of the front decorative cap is docked and fixed with the outer cylinder, and there is a gap between the front port of the front decorative cap and the air intake pipe, and the gap passes through the front joint. The through hole opened on the bottom wall of the sleeve communicates with the air convection cavity. The front decorative cap not only plays an aesthetic role, but the gap between the front decorative cap and the intake pipe can prevent the heat from the intake pipe from being transferred to the outer cylinder; at the same time, the cold air passes through the gap between the front decorative cap and the intake pipe and The through hole on the bottom wall of the front joint enters the air convection cavity, which can also play a role in cooling the outer cylinder.

The above-mentioned rear joint is a cylinder structure with the open end facing backward. The bottom wall of the cylinder is set on the tail pipe and welded with the rear end of the muffler. The side wall of the cylinder is fixed with the outer cylinder by rivets. A heat insulating ring is set on the rivet between the side wall and the outer cylinder. The tail pipe, the rear joint and the muffler are fixed together by welding, and the three are connected reliably; a heat insulating ring is set between the rear joint and the outer cylinder to prevent the heat from the rear joint from being transferred to the outer cylinder.

A rear decorative cap is set on the tailpipe at the rear of the above-mentioned rear adapter, the front port of the rear decorative cap is docked with the outer tube and fixed, and there is a gap between the rear port of the rear decorative cap and the tail pipe, and the gap passes through the rear connection The through hole opened on the bottom wall of the sleeve communicates with the air convection cavity. The rear decorative cap not only plays an aesthetic role, but also prevents the heat from the tail pipe from being transferred to the outer cylinder; at the same time, the cold air passes through the gap between the rear decorative cap and the tail pipe and the through hole on the bottom wall of the rear sleeve in turn. , into the air convection cavity, which can also play a role in cooling the outer cylinder.

Beneficial effects: the utility model adopts the combination of heat insulation and natural air flow cooling, which can control the surface temperature of the outer cylinder of the muffler at about 50°C, so that even if people directly contact the outer cylinder of the muffler, they will not cause burns, thereby It fundamentally eliminates the potential safety hazards caused by the high temperature of the outer wall of the muffler, and has the characteristics of simple structure, easy implementation, and strong versatility.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the connection between the intake pipe, the front sleeve, the muffler and the outer cylinder in the present invention.

Fig. 3 is a schematic diagram of the connection between the tailpipe, the rear sleeve, the muffler and the outer cylinder in the present invention.

Fig. 4 is a schematic structural diagram of the background technology.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in Figure 1, the utility model consists of an intake pipe 1, a muffler body 2, a tailpipe 3, a muffler pipe 4, a front sleeve 5, a rear sleeve 6, an outer cylinder 7, a heat insulator 9, and a front decorative cap 12. And components such as rear decorative cap 14 constitute. Wherein the muffler 2 is a straight-through pipe structure, the wall of the muffler 2 is a sandwich structure, and the interlayer is filled with a heat insulator 9, and the heat insulator 9 can be selected from heat insulating cotton or other equivalent heat insulating materials. In the muffler body 2, the muffler pipe 4 is set, and the assembly method (see Fig. 4) in the background technology can be adopted between the muffler pipe 4 and the muffler body 2, two muffler pipes 4 are set in the muffler body 2, and the muffler The inside of the body 2 is divided into three chambers by two partitions, and two adjacent chambers are communicated through the muffler pipe 4 .

This embodiment introduces in detail another assembly method between the muffler pipe 4 and the muffler body 2 (see Figure 1), that is, the muffler pipe 4 of a straight-through pipe structure is located in the muffler body 2, and the ends of the two are basically The two end caps 16 of the muffler pipe 4 are flush, and the muffler pipe 4, the end cap 16 and the muffler body 2 are fixed by welding, and a gap is formed between the end caps 16, the muffler pipe 4 and the muffler body 2. An annular cavity, which is divided into front, middle and rear sections by the outer front bulkhead 17 and the outer rear bulkhead 18; , middle and rear three sections, and the outer front bulkhead 17 and the inner front bulkhead 19 are located on the same vertical plane, and the outer rear bulkhead 18 and the inner rear bulkhead 20 are located on another vertical plane. On the tube body of the front, middle and rear sections of the muffler pipe 4, as well as the outer front partition 17 and the inner rear partition 20, there are through holes, so that when the gas enters the front section of the muffler pipe 4 inner holes, the air flow from the muffler The through hole of the pipe wall in the front section of the pipe 4 enters the front section of the annular cavity between the muffler pipe 4 and the muffler body 2, and then enters the middle section of the annular cavity through the through hole on the outer front bulkhead 17, and then passes through the middle section of the pipe wall of the muffler pipe 4. The through hole on the top enters the middle section of the inner hole of the muffler pipe 4, and then enters the rear section of the inner hole of the muffler pipe 4 through the through hole on the inner rear partition 20. Flow between the rear sections, and finally flow out from the rear port of the muffler pipe 4 (the flow direction of the air flow is shown by the arrow).

As shown in Figure 1, the muffler 2 is located in the outer cylinder 7, and the front and rear ends of the outer cylinder 7 are connected to the front and rear sleeves 5 and 6 respectively, and a wall is formed between the outer cylinder 7 and the muffler 2. An annular air convection chamber 8 , the air convection chamber 8 communicates with the outside world through the air inlet 7 a on the bottom surface of the outer cylinder 7 and the air outlet 7 b on the top surface of the outer cylinder 7 . The number and aperture size of the air inlet 7a and the air outlet 7b are determined according to different vehicle models and actual needs. In this embodiment, there are two air inlets 7 a located at both ends of the bottom surface of the outer cylinder 7 ; one air outlet 7 b is located at the rear end of the top surface of the outer cylinder 7 .

It can be further seen from Fig. 1, Fig. 2 and Fig. 3 that the front connecting sleeve 5 is a cylindrical structure with the open end facing forward, and the bottom wall of the cylindrical body is sleeved on the air intake pipe 1 and is connected with the air intake pipe 1 and the front end cover. 16 welding, the side wall of the cylinder body is fixed with the front end of the outer cylinder 7 by the rivet 10, and the heat insulating ring 11 is sleeved on the rivet 10 between the cylinder body side wall and the outer cylinder 7. A front decorative cap 12 is set on the air intake pipe 1 in front of the front sleeve 5. The front decorative cap 12 is tapered with a large rear and a small front. The rear port of the front decorative cap 12 is docked with the front port of the outer cylinder 7. Fixed by welding, there is an annular gap 13 between the front port of the front decorative cap 12 and the intake pipe 1 , and the gap 13 communicates with the air convection cavity 8 through the via hole 5 a provided on the bottom wall of the front sleeve 5 .

The rear sleeve 6 is a cylinder structure with the open end facing backward. The bottom wall of the cylinder is set on the front end of the tail pipe 3 and welded with the tail pipe 3 and the rear end cover 16. The side wall of the cylinder is connected with the rivet 10 The rear end of the outer cylinder 7 is fixed, and a heat insulating ring 11 is sleeved on the rivet 10 between the side wall of the cylinder body and the outer cylinder 7 . A rear decorative cap 14 is set on the tailpipe 3 on the rear side of the rear adapter 6. The rear decorative cap 14 is tapered with a large front and a small rear. The front port of the rear decorative cap 14 is docked with the rear port of the outer cylinder 7. , fixed by welding, there is a gap 15 between the rear port of the rear decorative cap 14 and the tail of the tail pipe 3, and the gap 15 communicates with the air convection chamber 8 through the via hole 6a provided on the bottom wall of the rear socket 6.

In the utility model, the high-temperature exhaust gas discharged during the operation of the motorcycle engine enters the muffler body 2 from the intake pipe 1 of the muffler, and is discharged from the tailpipe 3 after being muffled by the muffler pipe 4 . Since there is an air convection chamber 8 between the outer cylinder 7 and the muffler 2, the high-temperature gas cannot directly contact the outer cylinder 7; at the same time, the air enters the air convection chamber 8 from the air inlet 7a on the bottom surface of the outer cylinder 7, and after being heated, the air Moving upward, it is discharged from the air outlet 7b on the top surface of the outer cylinder 7, taking away most of the heat emitted by the outer wall of the muffler 2; in addition, due to the existence of gaps 13 and 15, the heat on the intake pipe 1 and tail pipe 3 cannot It is directly conducted to the outer cylinder 7 , and the cold air can enter the air convection chamber 8 through the gaps 13 , 15 to further cool the outer cylinder 7 . The interlayer of the muffler 2 is filled with a heat insulator 9, which can reduce the heat transferred to the outer cylinder 7; the outer cylinder 7 is connected with the front and rear sleeves 5 and 6 by riveting, and the joint is padded with a heat insulation ring 11, to avoid internal heat transfer to the outer cylinder 7. Under the dual effects of layered heat insulation and air cooling, the utility model can control the surface temperature of the outer cylinder of the muffler at about 50°C, so that even if personnel directly contact the outer cylinder of the muffler, they will not cause burns, thus fundamentally Eliminates the potential safety hazards caused by the high temperature of the outer wall of the muffler.

Claims (6)

1. A layered heat-insulated motorcycle muffler, in which a muffler pipe (4) is arranged inside the muffler body (2), and the front end of the muffler body (2) is connected to the intake pipe (1) through the front sleeve (5) , the rear end of the muffler (2) is connected to the tailpipe (3) through the back sleeve (6), and it is characterized in that: an outer cylinder (7) is arranged outside the muffler (2), and the outer The front and rear ends of the cylinder (7) are connected to the front and rear sleeves (5, 6) respectively, and an annular air convection chamber (8) is formed between the outer cylinder (7) and the muffler (2) , the air convection cavity (8) communicates with the outside world through the air inlet (7a) on the bottom surface of the outer cylinder (7) and the air outlet (7b) on the top surface of the outer cylinder (7). 2. The layered heat-insulated motorcycle muffler according to claim 1, characterized in that: the wall of the muffler (2) is a sandwich structure, and a heat insulator (9) is installed in the sandwich. 3. The layered heat-insulated motorcycle muffler according to claim 1 or 2, characterized in that: the front adapter (5) is a cylinder structure with the open end facing forward, and the bottom wall of the cylinder is set on The inlet pipe (1) is welded to the front end of the muffler (2), the side wall of the cylinder is fixed to the outer cylinder (7) by rivets (10), and the gap between the side wall of the cylinder and the outer cylinder (7) A heat insulating ring (11) is sleeved on the rivet (10). 4. The layered heat-insulated motorcycle muffler according to claim 3, characterized in that: a front decorative cap (12) is set on the air intake pipe (1) in front of the front sleeve (5), the front The rear port of the decorative cap (12) is docked with the outer cylinder (7) and fixed, and there is a gap (13) between the front port of the front decorative cap (12) and the air intake pipe (1), and the gap (13) is connected through the front The via hole (5a) opened on the bottom wall of the sleeve (5) communicates with the air convection chamber (8). 5. The layered heat-insulated motorcycle muffler according to claim 1 or 2, characterized in that: the rear joint (6) is a cylinder structure with the open end facing backward, and the bottom wall of the cylinder is set on The tail pipe (3) is welded to the rear end of the muffler (2), and the side wall of the cylinder is fixed to the outer cylinder (7) by rivets (10), between the side wall of the cylinder and the outer cylinder (7) The heat insulating ring (11) is sleeved on the rivets (10). 6. The layered heat-insulated motorcycle muffler according to claim 5, characterized in that: a rear decorative cap (14) is set on the tailpipe (3) behind the rear sleeve (6), and the rear The front port of the decorative cap (14) is docked and fixed with the outer cylinder (7), and there is a gap (15) between the rear port of the rear decorative cap (14) and the tailpipe (3), and the gap (15) is connected through the rear The via hole (6a) opened on the bottom wall of the sleeve (6) communicates with the air convection cavity (8).

Images