JPS60174324A - Muffler - Google Patents

Abstract

PURPOSE:To improve the sound muffling effect without giving bad influences onto other parts and a driver in a restricted space by constituting an outer box from the shaped sound-muffling material having the superior heat insulating performance and allowing said outer box to serve as cover. CONSTITUTION:A side cover 7 for the indication of number 6 is installed onto the lower side part of a seat 5, and said cover 7 acts also as muffler. The cover 7 is formed by joining the right and left divided bodies 8 and 8 made of the shaped sound-absorbing material having the superior heat insulating performance by using heat-resisting adhesive, and a space S is formed inside. The divided body 8 consists of a porous layer 8a having the superior sound absorbing and heat insulating performance in the inside part and a hard layer 8b having a rigidity and the superior sound shielding performance in the outside part. The space S is divided into the first expansion chamber S1 and the second expansion chamber S2 by a separator 11 through which communication pipes 10 and 10 penetrate, and an exhaust pipe 12 is set close to the first expansion chamber S1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motorcycle 11 or a motorcycle which can be used directly as a silencer.

For motorcycles etc., one end of the exhaust pipe is connected to the engine, and the other end is connected to an extinguishing NF device with an outer box made of a metal plate, and the exhaust is sent to the expansion chamber inside this outer box via the exhaust pipe. The exhaust gas is introduced and expanded to consume the energy contained in the exhaust gas, thereby reducing air noise.

By the way, since the exhaust gas has an extremely high temperature and the steel plate has good thermal conductivity, the hot water temperature on the surface of the silencer's outer box is quite high. Furthermore, since the II gas is pulsating, the silencer vibrates. For this reason, conventionally, the muffler is disposed such that a predetermined space is maintained between the muffler and other members so as not to affect other members. However, in the case of motorcycles, etc., the space for arranging each component is limited, and if a silencer is installed in this limited space while maintaining a predetermined space with other components, Therefore, the capacity of the muffler has to be small, and it is not possible to achieve a sufficient sound muffling effect.

In addition, since the outer box of the silencer is made of steel plate, although it may have a certain degree of sound insulation effect, it does not have a sound absorption effect, which is also the reason why it is not able to achieve a full 100% noise reduction effect. There is.

The present invention has been made in view of the conventional problems mentioned in (-), and its purpose is to maximize the noise reduction effect within a limited space without adversely affecting other members or passengers. Our goal is to provide a silencer that can deliver maximum performance.

In order to achieve this object, the silencer according to the present invention has an outer case made of a molded sound absorbing material with excellent heat insulation properties, and the outer case also serves as a cover for a motorcycle, etc. This is the summary.

Embodiments of the present invention will be described below with reference to accompanying drawings.

Fig. 1 is a side view of a motorcycle to which the silencer according to the first embodiment is applied, Fig. 2 is a cross-sectional view of the main part of Fig. wS1, and Fig. 3 is a partially cutaway view of the main part. The rear view and Figure wS4 are an enlarged cross-sectional view of the insertion part of the exhaust pipe.

An engine (3) is mounted and supported in the space surrounded by the frame (2) of the motorcycle (1).
3) A fuel tank (4) is supported by the upper frame (2), and a seat (5) is supported by the frame (2) behind the fuel tank (4).

And, on the lower side of the seat (5) there is a Zetsuken number (
A side cover (7) for displaying 6) is provided, and this side cover (7) has a structure that also functions as a muffler.

That is, as shown in FIGS. 2 and 3, the side cover (7
) is a left and right divided body (
8) and (8) are bonded together using a heat-resistant adhesive, and the shape forms a space (S) inside the bonded state. The divided body (8) has an inner part made of a porous layer (8, a) with excellent sound absorption and heat insulation properties, and an outer part made of a hard layer (tight layer) with excellent rigidity and sound insulation properties (8, a). )
It becomes.

Here, an example of a method for forming the divided body will be described below.

First, crow fibers such as long crow fibers or ceramic fibers, or organic long a fibers such as polyester are cut into appropriate lengths and mixed, and this is subjected to roller pressure and needling to form a mat-like mtta. After impregnating the cloak-like fiber with a binder such as ice crow, it is formed into a predetermined shape, that is, a divided body (
8) In a mold with a molding surface capable of forming a matte Ia#I
and pressure-fired. Then, a divided body (8) is obtained in which the portion in contact with the hot molding surface is a hard layer (tight layer) (8b) and the other portion is a porous layer (8a).

In addition, in order to increase the thickness and hardness of the hard layer (8b), for example, the surface of the mat-like fibers is impregnated with a thermosetting resin such as epoxy resin as a hainter, separately from the ice clast, and then fired. Alternatively, it is possible to apply heat (plastic resin) after firing.

The divided bodies (8) and (8) obtained in step 17 are butted together with their outer peripheral flange portions interposed with a heat-resistant adhesive, and the outer peripheral flange portions are further sandwiched between reinforcing members (9) to form the inside. A side cover (7) having a space (S)' is formed therein.

The space (S) is connected to the communicating pipes (10), (10
) penetrates the first expansion chamber (
Sl) and fir, divided into 7 expansion chambers (S2), the first
The expansion chamber (Sl) faces the rear end of an exhaust pipe (12) extending rearward from the engine (3). A large number of small holes (13) for sound absorption are bored in the rear end of this exhaust I pipe (12), and the surface of the side cover (7), which forms the insertion part of the exhaust pipe (12), is An elastic semi-hard layer (8c) is formed, and an old cotton cutting tool (14) is further wound around the outer periphery of this semi-hard layer (8c) and tightened to firmly fix the exhaust pipe (12).

On the other hand, a constriction part is provided in the second expansion chamber (S2), a screw (15) is provided in this constriction part, and this screw (15) is provided in the constriction part.
5) On the downstream side, there is a tail pipe (1) that communicates with the outside.
6) is coming. In addition, the side cover (7) at the lower position of the tail pipe (16) has a (111 removal hole)
7), plug this cleaning hole (17) with the evil body (18), and close the lid body (18) with the screw (19) on the side cover/knee (
7) I am trying to write a few phrases.

As mentioned above, how to mold the side cover (7) of an automatic LA car? If it is made of ￥ material, the molded sound absorbing material has excellent P17 heat resistance of 1'1°, so the structure of the 9-item cover (7) can be changed to 11°.
) Even if you make it double as a blind lid, it will not work - to the lid cover - (7
) will not be as high as J due to the influence of other parts or the power (-1). Therefore, space can be used effectively and the capacity of the silencer can be increased.
You can expect a significant sound deadening effect.

Figure 885 is a side view of a scooter-type motorcycle to which the silencer according to the second embodiment is applied, and Figure 6 is a side view of the same motorcycle.
It is a perspective A view of the main part of the motorcycle, and the motorcycle (21) is equipped with a leg shield (23) in front of a low-floor floor (22), a seat post (24) in the rear, and a seat post (24). A power unit (27) that integrates an engine (25) and a power transmission section (26) is installed on the F side of the
8) is rotatably supported.

In addition, a side cover (29) is provided on the side of the sea I-bost (24) to cover the 7'I': part of the rear a (28), and this side cover (29) also functions as a silencer. The structure is such that

That is, the side cover (29) is made of molded sound absorbing material, as in the previous embodiment, with the inner part made of a porous layer with excellent sound absorption and heat insulation properties, and the outer part made of hard rock with excellent rigidity and sound insulation properties. A space serving as an expansion chamber is formed inside. The exhaust pipe (30) from the engine (25) passes through the side cover (29) and faces this space.
Further, a tail pipe (31) that communicates the space with the outside is penetrated and held at the rear end of the side cover (29).

With this configuration, as in the case above, space can be used effectively, and it is possible to increase the amount of mist dispersion from the 71'J i machine, which may also have an adverse effect on other members or passengers. do not have.

FIG. 7 is a side view of a motorcycle to which the #l'l K device according to the third embodiment is applied, FIG. 8 is a side sectional view of the main part of the motorcycle, and FIG. 9 is a The engine (43) is mounted and supported in the space surrounded by the frame (42) of the motorcycle (41), as shown in the A-line sectional view.
A skid plate (44) is attached to the lower part of the vehicle (42), which is used to overcome protrusions such as rocks while driving, and the structure of this skid plate (44) is designed to also function as a 11'1i'f device. There is.

That is, the skid plate (44) is made by inserting a 1° member (46) also made of a molded sound-absorbing material into a lower member (45) made of a molded sound-absorbing material, and interposing a heat-resistant adhesive at each butt part. The mating portions are integrally joined by caulking with a reinforcing member (52) having a cross-sectional shape.

Then, when the upper member (46) and the member (45) are joined, the front part of the skid plate (44) is X"j: t)
, 1-li, a bofugus-like skit plate (44) is formed in which the rear portion is approximately horizontal and the F surface is a continuous curved surface.

In addition, there is a communication pipe (skid play) (44) inside
47) #iiλ [A pallet (48) is provided to divide the space inside the skid plate (44) into a first expansion chamber (Sl) and a second expansion chamber (S2), and [Skin] Play 1- (44) through the engine (
43) from the rear end of the exhaust pipe (49), and the second expansion chamber (S2) has a skid play
4) so as to face one end of the tail pipe (50) which communicates with the outside, and further on the outer periphery of the skinned plate (44) which becomes the insertion part of the exhaust pipe (49) and the tail pipe (50). Wrap the cotton pad (51) and tighten the exhaust pipe (49) and tail pipe (50) with the skid play 1.
・In contrast to (44), it is firmly fixed.

Here, the do member (45) and the 11 member (46) constituting the skid plate (44) have porous layers (45a) and (4ea) with excellent sound absorption and heat insulation properties on the inner side, The side part is made of hard yl with excellent rigidity (a5b),
(t6b), but in this embodiment, since the skid play 1 (44) comes into contact with a convex part of the road surface, etc., If! ! It is preferable that the l<inter used to form L7 (45b) and (48b) is made of a material having excellent molding power such as epoxy resin.

If the skid plate of a motorcycle is constructed of molded sweat absorbent material in this way, the space formed inside is used as one expansion chamber, and the exhaust pipe and tail pipe are made to face this expansion chamber to form a muffler, two parts can be constructed. I'lS1 can be installed in the space for one member, and the capacity of the muffler can be increased by that much, thereby increasing the muffling effect.

Figure 10 is a side view of a motorcycle with a fire extinguisher according to the fourth embodiment, and Figure 11 is an enlarged sectional view of the main part of the motorcycle (at). The engine (63) is installed in the space surrounded by the engine (83), and the fuel tank (64) is attached to the frame (82). ), then attach the rear cowl (65) to the frame (6
2), and a seat (
6G). The structure of the rear cowl (θ5) also functions as an 11" one-tone instrument.

That is, the rear cowl (65) is made of a molded sound absorbing material, the inner part is made of a porous layer (85a) with iQ sound absorption and heat insulation properties, the outer part is made of a hard JQ layer (65b) with excellent n properties, and A space (S) serving as one expansion chamber is formed. Then, in the space (S), the end of the exhaust pipe (67) extending from the engine (63) is exposed through the metal fitting (68). A tail pipe (G8) that communicates the space (S) with the outside is inserted and held through a sealing material (70).

In this way, the rear cowl (65) is made of molded sound-absorbing material, the space formed inside is made into a PM chamber, and the exhaust pipe and tail pipe are placed in this expansion chamber to function as a silencer. This eliminates the need for a space to install the muffler, provides 1t1 degree of freedom in arranging the components for its function, and allows the muffler itself to have a large capacity, which improves the muffling effect. can be achieved.

FIG. 12 is a side view of a scooter-type motorcycle to which the silencer according to the fifth embodiment is applied, and FIG. 13 is a partially cutaway perspective view of the main parts of the same motorcycle. Automatic 2+
tM,? A leg shield (73) extends upward from the front end of the low floor (72) of (71), and this astragalus seal F' (73) has a structure that functions as a silencer. I'm at t, 6.

That is, the astragalactic shield (73) consists of a front plate (74) and a rear plate (75), which are shaped suction material rollers, and If
! i fjn plate body (74) has a central part that is largely curved forward, and a 11-circle f' bending part that is curved rearward, and is a rear plate body (75).
The center part is curved in the direction of 1-+iQ, and it is -C. Then, the front plate f1ζ (74) and the rear plate body (75) are brought together at their peripheries, and the self-heating JuB cylindrical body is heated. By temporarily attaching it (c)nn dori p 1itl (S
) is formed.

In addition, a separator (77) with six communicating pipes (7G) is disposed in the space (S) in the annular direction, and the space (S) is connected to the first
It is divided into an expansion chamber (St) and an ff121 expansion chamber (S2), and the t51 expansion chamber (Sl) has an exhaust pipe (78) from the engine facing from one side, and the second expansion chamber (S2).
) is provided with a tail pipe (78) that communicates with the outside and is held therethrough. In addition, the front plate (74) and the rear plate (75) have porous inner parts D (74a) and (75a) with excellent sound absorption and heat insulation properties, and the outer part i' jl with excellent rigidity and sound insulation (local layer)
74b) and (75b).

With such a configuration, the capacity of the silencer can be increased by 71
It is possible to improve the direction of the +￥ effect and reduce the number of parts.

As explained in I below, according to the present invention, a 1-1-movement-2 gourd or]-1-movement unicycle Zidecopper, skit play'
The covers for the rear cowl, leg seals, and hat are made of molded suction material, and the 11 protrusions on the covers are made to be able to function as an extinguisher. Conventionally,
The space occupied by the muffler can be used as a shade for other parts, and the muffler itself can have a large capacity.The inside of the muffler has 118 porous holes for sound absorption. Because the layer is formed, the sound absorption effect can be greatly improved by +1J. In addition, the porous plate has excellent resistance to one stroke, so the surface of the holder does not become hot and is not exposed to other parts or other parts.
Furthermore, since the surface of the muffler is made of a cod layer with excellent n properties, it has sufficient strength to meet the demands of first-class strength. Furthermore, according to the present invention, since the silencer and the cover can be used together, it is possible to reduce the number of parts, etc., and achieve many effects such as being cost-effective and reducing weight. .

[Brief explanation of drawings]

Fig. 1 is a side view of a 11-motor two-wheeled vehicle to which the extinguisher according to the first example is applied, Fig. 2 is a side sectional view of the main part of Fig. 1, and Fig. 3
The figure is a rear view with the main part cut away, Figure 4 is an enlarged sectional view of the exhaust pipe insertion part, and Figure 5 is the second
Fig. 6 is a side view of the mechanical two-wheeled wheel 11 using the silencer according to the embodiment.
The figure is a side view of a motorcycle to which a 11') blind lid is applied according to the Pt53 example, Figure 8 is a side cross-sectional view of the main part of the same motorcycle, and Figure 9 is a side view of the motorcycle with the 11') blind lid applied to the Pt53 example. 10 is a side view of an automatic motor transport tlj to which the silencer according to the fourth embodiment is applied, FIG. FIG. 13 is a side view of a motorcycle to which the silencer according to the fifth embodiment is applied; FIG. 13 is a partially cut away perspective view of the main part of the motorcycle. , (21), (41), (Ell),
(71) is automatic wheel 111, (3), (25')',
(43), (63) are engines, (7), (29). (44), (+15), (73) are covers, (+2
), (30), (49), (67). (78) is Exis (・Pipe, (lfli), (
31), (50), (89). (79) is a tail pipe, and (S) is a space. 4.5M Applicant Ki 111 technique ω [1 industry stock holding agent, +r ri [de 111 Yong - Department Benoki Ju Hikoto Ohashi Patent attorney - To Koyama Right 〇9 - ~≦ Law No. 5 Figure 6 Figure 10 Figure 1 Figure 11 5 Figure 12

Claims (1)

[Claims] II Motorcycle 11 (or the cover of the motorcycle is constructed of a molded sound-absorbing layer having heat properties so as to form a space inside, and in this space, an Exis l pipe from the engine and a tail pipe communicating with the outside are installed. A pottery that is characterized by a double appearance.