JP2598879Y2 - Muffler mounting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muffler mounting device, and when a muffler is mounted on a vehicle body frame, a damper interposed between the vehicle body frame and the muffler does not rotate together.

[0002]

2. Description of the Related Art FIG.
As shown in FIG. 1, a muffler 2 for gradually expanding and discharging the exhaust gas while cooling it is provided. The muffler 2 is generally fixed to the vehicle body frame 3 in order to stabilize its attachment. This mounting state will be described with reference to FIGS. A muffler bracket 5 is fixed to the muffler 2 connected to the engine 4 of the motorcycle 1 by welding. The muffler bracket 5 is engaged with a bolt 7 of a damper 6 attached to the vehicle body frame 3 to tighten a nut 8. Thereby, the muffler 2 is attached to the vehicle body frame 3. In FIG. 12, reference numeral 9 denotes a radiator cover, and reference numeral 10 denotes a fuel tank.

[0003]

In the prior art described above, when the muffler is fixed to the body frame, a muffler bracket welded to the muffler is engaged with a bolt of a damper attached to the body frame. The muffler is attached to the body frame by tightening the nut, but when tightening the nut, the damper,
In some cases, the plate on which the bolts are attached rotates together with the nut as shown by the arrow in FIG. If the damper rotates in this way, the initial load is applied to the damper (particularly, the rubber portion), and the function as a normal damper cannot be sufficiently exerted, which may cause permanent deformation of the damper. Measures were needed. In addition, when the damper rotates around, the work has to be returned, and there is a problem that the workability is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. By providing a detent portion on a muffler bracket, it is possible to prevent the damper from rotating around when a nut is tightened and to improve workability. It is an object of the present invention to provide a muffler mounting device.

[0005]

According to the present invention, as a means for solving the above-mentioned problems, an engine is mounted in a body frame between a front wheel and a rear wheel, and connected to an exhaust port of the engine. A muffler that bends and turns downward after extending toward the front of the engine from the exhaust port and further extends toward the rear of the engine was provided, and a muffler bracket attached to the muffler was fastened to a lower front part of the engine via a damper. In the muffler mounting device, the muffler bracket has an engagement concave portion that engages with a protrusion disposed on the damper, and an opening of the engagement concave portion has an orientation of a muffler attachment port connected to an exhaust port of the engine. While being formed in substantially the same direction,
A detent part is provided at a position of the muffler bracket near the contact surface where the muffler bracket and the damper abut,
A damper member is interposed between a plate that fixes the damper to the vehicle body frame and a plate that has a protrusion for engaging the engagement recess, and is integrally formed. Is what you do.

According to the present invention, the muffler bracket attached to the muffler is formed with an engagement recess in which the direction of the opening is substantially the same as that of the muffler attachment port connected to the exhaust port of the engine. Is engaged with a protrusion (bolt) of a damper attached to the front lower portion of the engine to fasten the muffler to the vehicle body frame and the damper. In addition, a detent is provided at the muffler bracket near the contact surface where the muffler bracket and the damper abut, and the engaging recess of the muffler bracket is engaged with the protrusion of the damper, and tightened with a nut to fix In this case, even if the plate on which the projecting portion of the damper comes to rotate with the nut, the plate with the projecting portion of the damper comes into contact with the rotation preventing portion to stop the rotation of the damper. . On the other hand, a damper is sandwiched between a plate for fixing the damper member to the vehicle body frame and a plate on which a protruding portion with which the engaging recess of the muffler bracket engages is fixed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. 1 to 3 by attaching the same reference numerals to the same members as in FIGS. In FIG. 1, what is indicated by reference numeral 4 is an engine mounted on the body frame 3 between the front wheels and the rear wheels of the motorcycle 1 (see FIG. 11). The muffler 2 is connected to an exhaust port of the engine 4. As shown in FIG. 4, the muffler 2 extends toward the front of the engine 4 from a mounting flange 12 described later, and then bends downward and inverts as shown in FIG. It is of a shape that extends toward it. In FIG. 1, the right side shows the front side of the motorcycle. The muffler 2 is provided with one muffler bracket 5 which is formed by joining two plate portions and opening one side to form a mounting portion 5a, and is attached by welding the mounting portion 5a side.

An engagement recess 5b is formed on the other side of the muffler bracket 5 (see FIG. 3). As shown in FIG. 4, the direction of the opening of the engagement recess 5b is
Are substantially the same as the directions of the mounting flanges 12.
The muffler 2 is attached to the damper 6 by engaging the engaging recess 5 a with a bolt 7 which is a protrusion of a damper 6 provided at a lower front part of the engine 4 and tightening a nut 8. By this attachment, the muffler 2 is fixed to the vehicle body frame 3 via the damper 6. The damper 6 is interposed between the vehicle body frame 3 and the muffler 2 as described above, and absorbs and reduces the vibration from the engine 4 so as not to transmit the vibration to the muffler 2. Further, on the surface of the muffler bracket 5 near the contact surface where the damper 6 and the muffler bracket 5 come into contact, a rotation preventing portion 11 for preventing the damper 6 from rotating around is attached by spot welding (FIG. 2). And FIG. 3).

FIG. 4 and FIG. 5 show the muffler 2. In FIG. 4, one end of the muffler 2 is a mounting flange 12. The mounting flange 12 is a mounting port for connecting to an exhaust port (not shown) of the engine 4. The other end of the muffler 2 is an exhaust gas outlet. In FIG. 5, the portion indicated by reference numeral 13 is inside the vehicle body, and the portion indicated by reference numeral 14 is outside the vehicle body. 6 and 7 are enlarged views of the muffler bracket 5, and FIG. 6 is a view from an arrow A in FIG. 5, and FIG. 7 is a view from an arrow B in FIG. As described above, the other side of the muffler bracket 5 is an engagement concave portion 5b for engaging with the bolt 7 of the damper 6, and the above-described rotation stopping portion 11 is provided near the mounting portion 5a on one side. (See especially FIG. 2).

FIGS. 8 and 9 show the damper 6 in an enlarged manner. The damper 6 is formed by integrally bonding a plate 6a to be attached to the vehicle body frame 3 and a plate 6b to which a bolt 7 to be engaged with the muffler bracket 5 is attached with a ring-shaped rubber 6c as a damper member interposed therebetween. It is. FIG.
0 is a part of the cross section cut along the line CC of FIG.

Since the muffler 2 is fixed to the vehicle body frame 3 as described above, the muffler 2 is
It is moved from the front side to the rear side and assembled. At this time, the engaging concave portion 5b of the muffler bracket 5 welded to the muffler 2 is engaged with a bolt 7 of a damper 6 attached to a lower part of the front of the engine 4 of the body frame 3, and a nut 8 is screwed into the bolt 7. To fix the muffler bracket 5 to the damper 6. When tightening the nut 8, the damper 6
Although the whole receives a force that rotates together with the nut 8, the plate 6a of the damper 6 on the vehicle body frame 3 side is not rotated because it is fixed to the vehicle body frame 3, but the plate 6b on which the rubber 6c and the bolt 7 are mounted (FIG. 9 and FIG. 8) tends to rotate together with the nut 8. However, muffler bracket 5 has damper 6
Is provided, the plate 6b of the damper 6 is locked to the upper portion 11 to prevent the co-rotation.

[0012]

As described above, according to the present invention, since the muffler bracket attached to the muffler is formed with the engaging recess in which the direction of the opening is substantially the same as that of the muffler attachment port connected to the exhaust port of the engine. When the muffler is moved from the front side to the rear side of the cylinder and assembled, the engagement concave portion of the muffler bracket can be easily engaged with the protrusion of the damper attached to the lower front part of the engine. Thereby, the muffler can be easily assembled to the vehicle body frame and the damper. In addition, the muffler bracket is provided with a detent in the muffler bracket near the abutting surface where the muffler bracket and the damper abut, so the engaging recess of the muffler bracket is engaged with the protrusion of the damper and fixed with a nut. In this case, even if a force for rotating the entire damper is applied to the damper in accordance with the tightening of the nut, the plate of the damper, on which the protruding portion is mounted, is locked to the rotation preventing portion to prevent the damper from rotating together. As a result, the damper can be prevented from being permanently deformed, and co-rotation can be prevented. Therefore, it is not necessary to restore the damper, and the workability can be improved. Further, the damper is formed by interposing a damper member between a plate fixed to the vehicle body frame and a plate provided with a protruding portion with which the engaging concave portion of the muffler bracket engages, and by integrally bonding these members. Therefore, when the engaging recess of the muffler bracket is engaged with the projecting portion of the damper and the nut is tightened, even if the plate on which the projecting portion comes to rotate together with the nut, The plate provided with abuts against the rotation stopper provided on the muffler bracket to prevent co-rotation. Thereby, the function as a damper can be sufficiently exhibited.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of an embodiment of the present invention.

FIG. 2 is a bottom view of a muffler bracket mounting portion of FIG.

FIG. 3 is a rear view of a muffler bracket mounting portion in FIG. 1;

FIG. 4 is a side view of the muffler of the present invention.

FIG. 5 is a top view of the muffler of FIG. 4;

FIG. 6 is an enlarged side view of the muffler bracket.

FIG. 7 is a view as viewed in the direction of the arrow B in FIG. 6;

FIG. 8 is a front view of a damper.

FIG. 9 is a side view of the damper of FIG.

10 shows a part of a cross section taken along line CC of the damper of FIG.

FIG. 11 is a diagram illustrating a motorcycle.

FIG. 12 is a side view of a conventional muffler bracket mounting portion.

FIG. 13 is a bottom view of the muffler bracket mounting portion of FIG.

[Explanation of symbols]

 Reference Signs List 1 motorcycle 2 muffler 3 body frame 5 muffler bracket 6 damper 11 detent

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B62M 7/02 F16B 9/02 F16B 5/02

Claims (1)

(57) [Scope of request for utility model registration] 1. An air-conditioning device is provided in a body frame between a front wheel and a rear wheel.
Engine, connected to the exhaust port of the engine,
After turning to the front of the engine from the mouth, it bends downward and reverses,
In addition, a muffler that extends
The muffler bracket attached to the muffler
A muffler attached to the lower front of the gin via a damper
In the device, the muffler bracket has a protrusion provided on the damper.
Forming an engagement recess to engage, the direction of the opening of the engagement recess is
Approximately the same as the muffler mounting port connected to the exhaust port of the engine
And the muffler bracket
Muffler bracket near the contact surface where the
A detent part is provided at the position of
The plate fixed to the frame is engaged with the engagement recess.
With a damper member between it and the plate with
A muffler mounting device characterized by being integrally formed .