JP2009161022A - Saddle riding vehicle - Google Patents

Abstract

To provide a straddle-type vehicle in which an exhaust device having an expansion chamber is provided and the exhaust device and the body frame are absorbed and tolerances of the exhaust device and the exhaust frame are improved.
A bracket 131, a bolt 133, and a collar 140 support an exhaust chamber 120 movably along a direction in which the bolt 133 is inserted into a grommet 132 when the exhaust device is assembled to a motorcycle. The protruding direction of the bolt 133 is different from the protruding direction of the bolt attached to the left side of the exhaust chamber 120.
[Selection] Figure 8

Description

  The present invention relates to a straddle-type vehicle including an exhaust device having an expansion chamber provided in the middle of an engine and a silencer.

  2. Description of the Related Art Conventionally, an exhaust device provided in a saddle-ride type vehicle such as a motorcycle has widely used a structure having an expansion chamber, a so-called exhaust chamber, between an engine and a silencer. When an exhaust device having an exhaust chamber is attached to a saddle-ride type vehicle, a method of arranging the exhaust device in an exhaust chamber between an engine and a rear wheel is known (for example, see Patent Document 1).

The exhaust chamber is supported by the vehicle body frame. Specifically, brackets provided on both sides of the exhaust chamber are fixed to the vehicle body frame.
Japanese Unexamined Patent Publication No. 2007-8442 (page 6, FIG. 1, FIG. 9)

  By the way, since the exhaust device and the body frame are generally manufactured by welding, the tolerance is likely to be larger than that of a molded product manufactured by casting or the like. In the case of an exhaust device having an expansion chamber (exhaust chamber), the expansion chamber needs to be supported by the vehicle body frame in order to ensure the rigidity of the exhaust device in a state where it is attached to the saddle riding type vehicle.

  For this reason, if the expansion chamber is supported by the vehicle body frame, the mounting position of the exhaust device to the vehicle body frame is not constant, and the appearance quality of the saddle-ride type vehicle is impaired, and abnormal noise is likely to occur. It was.

  Therefore, the present invention has been made in view of such a situation, and in the case where an exhaust device having an expansion chamber is provided, the mounting accuracy of the exhaust device is improved while absorbing tolerances of the exhaust device and the vehicle body frame. The object is to provide a saddle-ride type vehicle.

  In order to solve the problems described above, the present invention has the following features. First, the first feature of the present invention is an exhaust system having a body frame, an engine that generates driving force for wheels, and an expansion chamber in which exhaust gas discharged through an exhaust pipe connected to the engine expands. A first support mechanism having a first convex portion and a second support mechanism having a second convex portion, wherein the expansion chamber includes the engine and the exhaust gas. Is provided in the middle of the silencer that discharges the air to the outside, and is supported by the vehicle body frame by the first support mechanism and the second support mechanism, and the first support mechanism supports the expansion chamber in an immovable manner. The second convex portion is inserted into the insertion portion provided in the vehicle body frame or the expansion chamber, and the second support mechanism is at least when the exhaust device is assembled to the straddle-type vehicle. The expansion chamber is connected to the second convex portion. Movably supported along the insertion direction of the insertion portion, the protruding direction of the second convex portion is summarized in that different from the protruding direction of the first convex portion.

  According to the features of the present invention, in the case of including an exhaust device having an expansion chamber, it is possible to provide a straddle-type vehicle that improves the accuracy of attaching the exhaust device while absorbing tolerances of the exhaust device and the vehicle body frame.

  Next, an embodiment of a saddle riding type vehicle according to the present invention will be described with reference to the drawings. Specifically, (1) Overall schematic configuration of saddle riding type vehicle, (2) Exhaust device configuration, (3) Exhaust device mounting state, (4) Cylindrical structure, (5) Action and effect, (6) Other embodiments will be described.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

  Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(1) Overall Schematic Configuration of Saddle Type Vehicle FIG. 1 is a left side view of a motorcycle 10 that constitutes a saddle type vehicle in the present embodiment. FIG. 2 is a right side view of the motorcycle 10 with a vehicle body cover (not shown) and the like removed.

  As shown in FIGS. 1 and 2, the motorcycle 10 includes a front wheel 20 and a rear wheel 90. The motorcycle 10 drives the rear wheel 90 with a driving force generated by the engine 40.

  The engine 40 is a single-cylinder four-cycle type. The engine 40 is air-cooled and has a small displacement. The engine 40 is attached to the vehicle body frame 30 that forms the skeleton of the motorcycle 10.

  A center stand 50 that supports the motorcycle 10 substantially perpendicular to the road surface is attached to the body frame 30.

  An exhaust device 100 is connected to the engine 40. Specifically, the exhaust pipe 110 is connected to the right side portion 40b of the cylinder head 40a of the engine 40.

  The exhaust device 100 is integrally formed by welding. Specifically, the exhaust device 100 includes an exhaust pipe 110, an exhaust chamber 120, and a silencer 190. The exhaust chamber 120 communicates with the exhaust pipe 110. The silencer 190 communicates with the exhaust chamber 120. That is, the exhaust chamber 120 is provided in the middle of the engine 40 and the silencer 190.

  In the exhaust chamber 120, the exhaust gas discharged from the engine 40 via the exhaust pipe 110 is expanded. The exhaust chamber 120 has a box shape. In the present embodiment, the exhaust chamber 120 constitutes an expansion chamber.

  The silencer 190 is located at the rear end portion of the exhaust device 100. The silencer 190 is arranged on the right side 10Ra of the motorcycle 10, specifically, on the right side of the rear wheel 90. Exhaust gas is discharged from the exhaust port 190a. The silencer 190 is supported by a stay 33 that extends from the vehicle body frame 30.

  The exhaust chamber 120 and the silencer 190 reduce exhaust noise generated by the engine 40. In the present embodiment, since the exhaust chamber 120 is provided, the size of the silencer 190 is smaller than in the case where the exhaust chamber 120 is not provided. That is, the overall length of the exhaust device 100 is shortened compared to the case where the exhaust chamber 120 is not provided.

(2) Configuration of Exhaust Device Next, the configuration of the exhaust device 100 will be described. Specifically, the overall configuration of the exhaust device 100 and the configuration of the exhaust chamber 120 (expansion chamber) will be described.

(2.1) Overall Configuration FIG. 3 is an overall perspective view of the exhaust device 100. As shown in FIG. 3, the exhaust device 100 includes an exhaust pipe 110, an exhaust chamber 120, a reflux pipe 180, and a silencer 190.

  The exhaust pipe 110 is formed by bending a pipe having a circular cross section. The exhaust pipe 110 is connected to the cylinder head 40a. Specifically, the exhaust pipe 110 has a connection part 115 connected to the right side part 40b of the cylinder head 40a.

  The exhaust chamber 120 communicates with the exhaust pipe 110. A bracket 121 is provided on the left side 120 </ b> Lb of the exhaust chamber 120. Meanwhile, a bracket 131 is provided on the right side 120 </ b> Rb of the exhaust chamber 120. The bracket 131 is formed with a grommet support portion 131 a that supports the grommet 132.

  The reflux tube 180 communicates with the front end portion 120 a of the exhaust chamber 120. The recirculation pipe 180 circulates the exhaust gas discharged from the exhaust chamber 120 to the exhaust chamber 120.

  The silencer 190 communicates with the exhaust chamber 120. The silencer 190 is formed with an exhaust port 190a through which exhaust gas that has passed through the exhaust pipe 110, the exhaust chamber 120, and the reflux pipe 180 is discharged to the outside. The silencer 190 has a cylindrical shape and is disposed along the front-rear direction of the motorcycle 10. A protector 191 is provided outside the silencer 190.

  The silencer 190 is provided with a mounting bracket 192 connected to the stay 33 (see FIG. 2). That is, the silencer 190 is fixed to the vehicle body frame 30.

(2.2) Configuration of Expansion Chamber FIG. 4 is a plan view of the exhaust chamber 120 and the reflux pipe 180 that configure the expansion chamber in the present embodiment. FIG. 5 is a left side view of the exhaust chamber 120 and the reflux pipe 180.

  As shown in FIGS. 4 and 5, a catalyst 111 for purifying exhaust gas discharged from the engine 40 (see FIGS. 1 and 2) is disposed in the box-shaped exhaust chamber 120. The catalyst 111 is connected to the exhaust pipe 110. The exhaust gas that has passed through the exhaust pipe 110 is guided to the catalyst 111. A communication unit 112 communicates with the catalyst 111. In addition, the communication unit 112 communicates with the reflux tube 180.

  The exhaust gas discharged from the communication portion 112 to the reflux pipe 180 is discharged from the protruding portion 181 into the exhaust chamber 120. That is, the exhaust gas discharged from the protrusion 181 expands in the exhaust chamber 120.

  A nut 121a into which a bolt 123 (not shown in FIGS. 4 and 5; see FIG. 6) is screwed is formed on the bracket 121 provided on the left side 120Lb. In addition, a grommet support portion 131a is formed on the bracket 131 provided on the right side portion 120Rb.

(3) Exhaust Device Attachment State Next, the exhaust device 100 attachment state will be described. Specifically, the attachment state of the left side portion 120Lb of the exhaust chamber 120 and the attachment state of the right side portion 120Rb of the exhaust chamber 120 will be described.

(3.1) Left side 120Lb
6 is a perspective view of the periphery of the left side 120Lb and the left side 120Lb of the exhaust chamber 120. FIG. Specifically, FIG. 6 is a perspective view of the periphery of the exhaust chamber 120 from the diagonally left rear.

  As shown in FIG. 6, a frame bracket 31 is connected to the vehicle body frame 30. In the present embodiment, the frame bracket 31 constitutes a part of the vehicle body frame 30. The frame bracket 31 supports the center stand 50 in a rotatable manner. An exhaust pipe 110 is disposed inside the center stand 50 in the vehicle width direction.

  A boss 31 a is formed on the frame bracket 31. An insertion hole (not shown) through which the bolt 123 is inserted is formed in the boss 31a.

  The bolt 123 is inserted into the boss 31a and screwed into a nut portion 121a (see FIG. 4) formed on the bracket 121. In the present embodiment, the bolt 123 constitutes a first convex portion. In the present embodiment, the bracket 121 and the bolt 123 constitute a first support mechanism that supports the exhaust chamber 120 via the vehicle body frame 30 (frame bracket 31). The first support mechanism supports the left and right side portions of the chamber, specifically, the left side portion 120Lb.

  The bracket 121 and the bolt 123 support the left side 120 </ b> Lb of the exhaust chamber 120. Specifically, the bracket 121 and the bolt 123 support the exhaust chamber 120 so as not to move.

(3.2) Right Part FIG. 7 is a perspective view of the periphery of the right part 120Rb and the right part 120Rb of the exhaust chamber 120. FIG. Specifically, FIG. 7 is a perspective view of the periphery of the exhaust chamber 120 from the right front side. FIG. 8 is a cross-sectional view of the bracket 131 taken along line F8-F8 shown in FIG.

  FIG. 9 is a side view of the vicinity of the right side 120Rb and the right side 120Rb of the exhaust chamber 120.

  As shown in FIGS. 7 to 9, a frame bracket 32 is connected to the vehicle body frame 30. In the present embodiment, the frame bracket 32 constitutes a part of the vehicle body frame 30. The frame bracket 32 is provided with a chamber support portion 32a in which an insertion hole 32b (see FIG. 9) is formed.

  The bolt 133 and the collar 140 are inserted through the insertion hole 32b. In the present embodiment, the bolt 133 constitutes a second convex portion. The collar 140 forms a cylindrical body. In the present embodiment, the second convex portion includes the collar 140, and the second convex portion is cylindrical.

  Bolts 133 are inserted through the collar 140. Specifically, a bolt 133 is screwed into the collar 140.

  The bolt 133 and the collar 140 are inserted into a grommet 132 provided in the exhaust chamber 120. The bracket 131 is provided on the outer side in the vehicle width direction than the reflux pipe 180. The bolt 133 and the collar 140 are inserted into a grommet 132 supported by a grommet support part 131 a formed on the bracket 131. The grommet 132 is formed of an elastic member (rubber).

  In the present embodiment, the bracket 131, the bolt 133, and the collar 140 constitute a second support mechanism that supports the exhaust chamber 120 via the vehicle body frame 30. Moreover, in this embodiment, the grommet 132 comprises the to-be-inserted part.

As described above, the first support mechanism (the bracket 121 and the bolt 123) supports the left and right sides of the chamber, specifically, the left side 120Lb. On the other hand, the second support mechanism supports the other side of the exhaust chamber 120, specifically, the right side 120Rb. That is,
The protruding direction of the second convex portion (bolt 133 and collar 140) is different from the protruding direction of the first convex portion (bolt 123).

  The bracket 131, the bolt 133, and the collar 140, that is, the second support mechanism, moves the exhaust chamber 120 along the insertion direction of the bolt 133 and the collar 140 into the grommet 132 when the exhaust device 100 is assembled to the motorcycle 10. Support as possible. Specifically, as shown in FIG. 8, the grommet 132 slidably receives the collar 140. A washer 134 is interposed between the bolt 133 and the chamber support portion 32a. A gap G is provided between the collar 140 and the grommet 132.

  In the present embodiment, even after the exhaust device 100 is assembled to the motorcycle 10, the exhaust chamber 120 is supported so as to be movable along the insertion direction of the bolt 133 and the collar 140 into the grommet 132.

  Further, as shown in FIG. 8, the collar 140 is formed with a detent 143 that protrudes toward the chamber support portion 32a of the frame bracket 32 and engages with the chamber support portion 32a. In the present embodiment, the detent 143 constitutes an engaging convex portion.

  In the present embodiment, the exhaust device 100 is assembled to the vehicle body frame 30 from below the motorcycle 10. At the time when the exhaust device 100 is assembled to the vehicle body frame 30, only the collar 140 is inserted into the grommet 132. The bolt 133 is a female threaded portion 141a of the collar 140 after the exhaust device 100 is assembled to the vehicle body frame 30, that is, after the bracket 131 is positioned on the inner side in the vehicle width direction than the chamber support portion 32a of the frame bracket 32 (FIG. 9). And FIG. 10).

  In order to prevent the exhaust device 100 from interfering with the chamber support portion 32a when assembled to the vehicle body frame 30 from below the motorcycle 10, the rotation stopper 143 is located below the chamber support portion 32a. That is, the detent 143 is located on the opposite side (downward) side with respect to the assembly direction (upward direction) when the exhaust device 100 is assembled to the motorcycle 10.

  As shown in FIG. 9, an insertion hole 32 b is formed in the chamber support portion 32 a of the frame bracket 32. The bolt 133 is screwed into the female screw portion 141a of the collar 140 through the insertion hole 32b. Further, the bolt 133 and the collar 140 are inserted into the grommet 132 through the insertion hole 32b.

  In the present embodiment, the length L1 of the insertion hole 32b along the front-rear direction of the motorcycle 10 is longer than the height H1 of the insertion hole 32b along the vertical direction of the motorcycle 10. That is, the insertion hole 32b is a long hole extending along the front-rear direction of the motorcycle 10.

(4) Structure of Cylindrical Body FIG. 10 is an exploded perspective view of the second support mechanism including the collar 140 constituting the cylindrical body in the present embodiment.

  As shown in FIG. 10, the collar 140 has a body part 141, a collar part 142, and a rotation stopper 143. An internal thread portion 141 a is formed in the body portion 141, and a bolt 133 is inserted therethrough. The collar 142 is connected to the body 141 and has an outer diameter larger than that of the body 141.

  The detent 143 is formed on a part of the outer edge 142 a of the flange 142. The detent 143 protrudes toward the chamber support portion 32a, that is, toward the outside in the vehicle width direction. The detent 143 contacts the lower edge portion 32c of the chamber support portion 32a. Since the rotation stopper 143 contacts the lower edge portion 32 c, the collar 140 is prevented from rotating together with the bolt 133 even if the bolt 133 is screwed into the female screw portion 141 a after the exhaust device 100 is assembled to the vehicle body frame 30.

(5) Action / Effect A straddle-type vehicle (motorcycle 10) according to the present embodiment includes a body frame (body frame 30) and an engine (engine 40) that generates driving force for wheels (rear wheels 90). An exhaust device (exhaust device 100) having an expansion chamber (exhaust chamber 120) in which exhaust gas discharged through an exhaust pipe (exhaust tube 110) connected to the engine expands. The saddle riding type vehicle (motorcycle 10) includes a first support mechanism (bracket 121 and bolt 123) having a first convex portion (bolt 123) and a second support mechanism having a second convex portion (bolt 133). (The bracket 131, the bolt 133, and the collar 140), and the expansion chamber is provided in the middle of the engine and a silencer (silencer 190) that discharges the exhaust gas to the outside, and the first support mechanism The second support mechanism is supported by the vehicle body frame, the first support mechanism supports the expansion chamber in an immovable manner, and the second convex portion is provided in the vehicle body frame or the expansion chamber. The second support mechanism is inserted into the insertion portion (grommet 132), and at least when the exhaust device is assembled to the straddle-type vehicle, the second support mechanism connects the expansion chamber to the insertion portion of the second convex portion. Movably supported along the insertion direction, the projecting direction of the second convex portion may be different from the protruding direction of the first convex portion.

  According to such a motorcycle 10, the second support mechanism (the bracket 131, the bolt 133, and the collar 140) allows the exhaust chamber 120 to be connected to the second convex portion (bolt) when the exhaust device 100 is assembled to the motorcycle 10. 133 and the collar 140) are supported so as to be movable along the insertion direction of the grommet 132. The protruding direction of the second convex portion is different from the protruding direction of the first convex portion (bolt 123).

  For this reason, while the exhaust chamber 120 is reliably supported by the first convex portion and the second convex portion, the tolerance of the exhaust device 100 and the vehicle body frame 30, specifically, the tolerance in the vehicle width direction is further increased. Can be absorbed reliably. That is, according to the motorcycle 10, the mounting accuracy of the exhaust device 100 can be improved.

  In particular, in this embodiment, since the exhaust device 100 is integrally formed by welding, it is necessary to absorb tolerances.

  In the saddle riding type vehicle (motorcycle 10) according to the present embodiment, the insertion portion is further provided in the expansion chamber, and the body frame is inserted through the second convex portion. (Insertion hole 32b) is formed, and the second convex portion is inserted into the insertion portion through the insertion hole.

  In the saddle riding type vehicle (motorcycle 10) according to the present embodiment, the second convex portion is further cylindrical.

  Thus, the second convex portion is inserted into the grommet 132 provided on the exhaust chamber 120 side through the insertion hole 32b. Further, the second convex portion is cylindrical. Therefore, the exhaust device 100 is mounted on the vehicle body frame while improving the mounting accuracy of the exhaust device 100 as compared with the case where the second convex portion is formed on the vehicle body frame 30 side or the case where the second convex portion is not cylindrical. 30 can be easily assembled.

  In the saddle riding type vehicle (motorcycle 10) according to the present embodiment, the second convex portion further includes a cylindrical body (collar 140) through which the second convex portion is inserted, and the cylindrical body is The insertion portion is inserted through the insertion portion.

  That is, the second convex portion is constituted by the bolt 133 and the collar 140, and the bolt 133 and the collar 140 are inserted through the grommet 132. For this reason, a 2nd convex-shaped part can be easily formed using the bolt 133 and the collar 140 of a general shape.

  In the saddle riding type vehicle (motorcycle 10) according to the present embodiment, the inserted portion is further formed by an elastic member and is supported by the second support mechanism provided in the expansion chamber (grommet). 132).

  Thus, the grommet 132 is formed of an elastic member (rubber). For this reason, generation | occurrence | production of the noise and vibration in the support part of the exhaust chamber 120 can be suppressed.

  In the saddle riding type vehicle (motorcycle 10) according to the present embodiment, the first support mechanism further supports one of the left and right side portions (left side portion 120Lb) of the expansion chamber, and the second support mechanism is The other side portion (right side portion 120Rb) of the expansion chamber is supported.

  That is, the first support mechanism (the bracket 121 and the bolt 123) supports the left side 120Lb of the exhaust chamber 120, and the second support mechanism (the bracket 131, the bolt 133, and the collar 140) supports the right side 120Rb of the exhaust chamber 120. To support. For this reason, the exhaust chamber 120 can be reliably supported while improving the mounting accuracy of the exhaust device 100.

  In the saddle riding type vehicle (motorcycle 10) according to the present embodiment, the cylindrical body further includes a body portion (body portion 141) through which the second convex portion is inserted, and an outer diameter larger than the body portion. There is a large flange part (the collar part 142), and the collar part is in contact with the body frame.

  As described above, the collar 140 has the collar 142, and the collar 142 contacts the chamber support 32 a of the frame bracket 32. For this reason, the strength of the portion where the collar 140 contacts the frame bracket 32 can be improved.

  In the saddle riding type vehicle (motorcycle 10) according to the present embodiment, a part of the outer edge (outer edge 142a) of the saddle portion protrudes toward the body frame and engages with the body frame. A mating convex portion (detent 143) is formed.

  In the straddle-type vehicle (motorcycle 10) according to the present embodiment, the engagement convex portion is further in a direction opposite to the assembly direction (upward direction) when the exhaust device is assembled to the straddle-type vehicle. It is located on the (downward) side.

  Thus, the detent 143 is formed on the outer edge 142a of the flange 142. Specifically, the rotation stopper 143 is formed in the lower part of the flange 142. For this reason, it is possible to prevent the rotation stopper 143 from interfering with the chamber support portion 32a when the motorcycle 10 is assembled to the vehicle body frame 30 from below.

  In the straddle-type vehicle (motorcycle 10) according to the present embodiment, the length (length L1) of the insertion hole along the front-rear direction of the straddle-type vehicle is the upper and lower sides of the straddle-type vehicle. It is longer than the height (height H1) of the insertion hole along the direction. For this reason, in addition to the tolerance of the exhaust device 100 and the vehicle body frame 30 in the vehicle width direction, the tolerance in the front-rear direction of the motorcycle 10 can be absorbed.

  In the saddle riding type vehicle (motorcycle 10) according to the present embodiment, the first support mechanism further supports the left side of the expansion chamber, and the silencer is provided on the right side of the saddle riding type vehicle. It is arrange | positioned and the said silencer is fixed to the said vehicle body frame, It is characterized by the above-mentioned.

  In the saddle riding type vehicle (motorcycle 10) according to the present embodiment, the first support mechanism further supports the left side of the expansion chamber, and the exhaust pipe is connected to the right side of the engine. It is characterized by that.

  Thus, since the exhaust apparatus 100 is fixed from both left and right sides, the mounting strength of the exhaust apparatus 100 can be improved.

(6) Other Embodiments As described above, the contents of the present invention have been disclosed through one embodiment of the present invention. However, it is understood that the description and drawings constituting a part of this disclosure limit the present invention. should not do. From this disclosure, various alternative embodiments will be apparent to those skilled in the art.

  For example, in the above-described embodiment, the second convex portion is configured by the bolt 133 and the collar 140, but the collar 140 having the collar portion 142 is not necessarily used. A sleeve-like collar that does not have the collar 142 may be used. Further, after the exhaust device 100 is assembled to the vehicle body frame 30, the exhaust chamber 120 may be fixed using bolts or nuts so that the exhaust chamber 120 cannot move in the vehicle width direction.

  In the above-described embodiment, the second convex portion has a cylindrical shape, but the second convex portion may have a shape other than the cylindrical shape, for example, a prism shape.

  In the embodiment described above, the grommet 132 is formed of an elastic member (rubber). However, the grommet 132 may be formed of another elastic member, for example, a synthetic resin. Further, the grommet 132 may be provided not on the exhaust chamber 120 side but on the vehicle body frame 30 side.

  In the embodiment described above, the first support mechanism (the bracket 121 and the bolt 123) supports the left side 120Lb of the exhaust chamber 120, and the second support mechanism (the bracket 131, the bolt 133, and the collar 140) supports the exhaust chamber 120. Although the right side portion 120Rb is supported, the first support mechanism and the second support mechanism do not necessarily support the left side portion 120Lb and the right side portion 120Rb of the exhaust chamber 120. For example, the first support mechanism may support the front end 120 a of the exhaust chamber 120.

  In the above-described embodiment, the first support mechanism is configured by the bracket 121 and the bolt 123, but the first support mechanism may be configured by a shaft, a nut, and the like.

  In the embodiment described above, the exhaust device 100 is integrally formed with the exhaust pipe 110, the exhaust chamber 120, and the silencer 190. However, the exhaust device 100 is not necessarily integrated with the exhaust pipe 110, the exhaust chamber 120, and the silencer 190. It may not be formed as.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

1 is a left side view of a motorcycle 10 according to an embodiment of the present invention. 1 is a right side view of a motorcycle 10 according to an embodiment of the present invention with a vehicle body cover (not shown) and the like removed. 1 is an overall perspective view of an exhaust device 100 according to an embodiment of the present invention. It is a top view of the exhaust chamber 120 and the reflux pipe 180 which concern on embodiment of this invention. FIG. 4 is a left side view of an exhaust chamber 120 and a reflux pipe 180 according to an embodiment of the present invention. FIG. 6 is a perspective view of the vicinity of a left side 120Lb and a left side 120Lb of an exhaust chamber 120 according to an embodiment of the present invention. FIG. 6 is a perspective view of the vicinity of a right side portion 120Rb and a right side portion 120Rb of an exhaust chamber 120 according to an embodiment of the present invention. It is sectional drawing of the bracket 131 which followed F8-F8 line shown in FIG. 5 which concerns on embodiment of this invention. FIG. 6 is a side view of the periphery of the right side 120Rb and the right side 120Rb of the exhaust chamber 120 according to the embodiment of the present invention. FIG. 6 is an exploded perspective view of a second support mechanism including a collar 140 according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 10Ra ... Right side part, 20 ... Front wheel, 30 ... Body frame, 31 ... Frame bracket, 31a ... Boss, 32 ... Frame bracket, 32a ... Chamber support part, 32b ... Insertion hole, 32c ... Lower edge part, 33 ... Stay, 40 ... Engine, 40a ... Cylinder head, 50 ... Center stand, 90 ... Rear wheel, 100 ... Exhaust device, 110 ... Exhaust pipe, 111 ... Catalyst, 112 ... Communication part, 120 ... Exhaust chamber, 120a ... Front end Part, 120Lb ... left side part, 120Rb ... right side part, 121 ... bracket, 121a ... nut part, 123 ... bolt, 131 ... bracket, 131a ... grommet support part, 132 ... grommet, 133 ... bolt, 134 ... washer, 140 ... color 141 ... Body part, 141a ... Female thread part, 142 ... Butt part, 142a ... Edge 143 ... detent, 180 ... reflux condenser, 181 ... protrusions 190 ... silencer, 190a ... exhaust port, 191 ... protector, 192 ... mounting bracket, G ... gap, H1 ... height, L1 ... Length

Claims (12)

Body frame,
An engine that generates driving force for the wheels;
A straddle-type vehicle comprising: an exhaust device having an expansion chamber in which exhaust gas discharged through an exhaust pipe connected to the engine expands;
A first support mechanism having a first convex portion;
A second support mechanism having a second convex portion,
The expansion chamber is
Provided in the middle of the engine and the silencer that exhausts the exhaust gas to the outside,
Supported by the vehicle body frame by the first support mechanism and the second support mechanism;
The first support mechanism supports the expansion chamber so as not to move,
The second convex portion is inserted through a portion to be inserted provided in the body frame or the expansion chamber,
The second support mechanism supports the expansion chamber so as to be movable along the insertion direction of the second convex portion into the insertion portion at least when the exhaust device is assembled to the straddle-type vehicle.
A straddle-type vehicle in which a protruding direction of the second convex portion is different from a protruding direction of the first convex portion. The inserted portion is provided in the expansion chamber,
The body frame is formed with an insertion hole through which the second convex portion is inserted,
2. The straddle-type vehicle according to claim 1, wherein the second convex portion is inserted into the insertion portion through the insertion hole.   The straddle-type vehicle according to claim 2, wherein the second convex portion has a columnar shape. The second convex portion includes a cylindrical body through which the second convex portion is inserted,
The straddle-type vehicle according to claim 3, wherein the cylindrical body is inserted into the inserted portion. The cylindrical body is
A body part through which the second convex part is inserted;
Having a collar portion having an outer diameter larger than that of the body portion;
The saddle riding type vehicle according to claim 4, wherein the saddle portion is in contact with the body frame.   The straddle-type vehicle according to claim 5, wherein an engagement convex portion that protrudes toward the vehicle body frame and engages with the vehicle body frame is formed on a part of an outer edge of the flange portion.   The straddle-type vehicle according to claim 6, wherein the engagement convex portion is located on a side opposite to an assembly direction when the exhaust device is assembled to the straddle-type vehicle.   The straddle-type vehicle according to claim 4, wherein the inserted portion includes a grommet formed of an elastic member and supported by the second support mechanism provided in the expansion chamber. The first support mechanism supports the left and right sides of the expansion chamber,
The straddle-type vehicle according to claim 1, wherein the second support mechanism supports the other side portion of the expansion chamber. The first support mechanism supports a left side portion of the expansion chamber,
The silencer is disposed on the right side of the saddle riding type vehicle,
The straddle-type vehicle according to claim 9, wherein the silencer is fixed to the vehicle body frame. The first support mechanism supports a left side portion of the expansion chamber,
The straddle-type vehicle according to claim 9, wherein the exhaust pipe is connected to a right side portion of the engine.   The straddle-type vehicle according to claim 3, wherein a length of the insertion hole along the front-rear direction of the saddle-ride type vehicle is longer than a height of the insertion hole along a vertical direction of the straddle-type vehicle.

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