JP6699006B2 - Vehicle muffler mounting position adjustment device - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle muffler mounting position adjustment device that supports a vehicle muffler that guides vehicle exhaust gas to a vehicle body.

  Conventionally, the technique described in Patent Document 1 is known as a vehicle muffler. In this publication, the exhaust outlet position of the muffler is adjustable in the front-rear direction so that the exhaust outlet position is set at a desired position with respect to the bumper at the rear of the vehicle.

JP, 2005-61275, A

  In recent years, for the purpose of improving the design and reducing the air resistance, vehicles have been introduced in which an exhaust outlet position is formed in a bumper of a vehicle and a muffler outlet is installed in a through hole formed in the bumper. In this case, very high assembly accuracy is required to align the exhaust outlet position of the muffler with the position of the through hole. Therefore, even if the exhaust outlet position can be adjusted in the front-rear direction as in the conventional technique, there is a problem that sufficient accuracy cannot be obtained.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle muffler mounting position adjusting device capable of accurately adjusting an exhaust outlet position to a desired position.

In order to achieve the above object, in the present invention, a first exhaust pipe connected to an engine and a second exhaust pipe connected through a connecting member capable of freely changing a connection angle with the first exhaust pipe are provided. An exhaust pipe and a vehicle muffler mounting position adjusting device having:
The second vehicle vertical position and / or the vehicle left-right direction position of the exhaust pipe and the body have a adjustable adjusting mechanism, the adjusting mechanism extends in the vehicle vertical direction, connected to the second exhaust pipe A first plate, a second plate arranged side by side in the vehicle front-rear direction with the first plate and connected to the vehicle body side, a first hole formed in the first plate and the second plate And a maximum diameter of the first hole and the second hole is equal to or larger than a diameter obtained by adding 1 mm to the nominal diameter of the bolt. Is a first elongated hole having a predetermined first direction as a longitudinal direction, and the second hole is a second elongated hole having a second direction different from the first direction as a longitudinal direction. The first elongated hole is a plurality of rows of elongated holes parallel to each other in the longitudinal direction, the second elongated hole is a plurality of rows of elongated holes parallel to the longitudinal direction, and the bolt is one of the plurality of rows of elongated holes. It was decided to be a plurality of bolts penetrating both of them and erected on the fixing member .

  Therefore, the position of the second exhaust pipe can be adjusted with the connection member as a fulcrum, and the position of the exhaust outlet can be adjusted to a desired position with high accuracy.

FIG. 1 is a diagram illustrating a configuration of an entire muffler including a vehicle muffler mounting position adjusting device according to a first embodiment. 3 is a perspective view illustrating a vehicle muffler adjustment mechanism of Embodiment 1. FIG. 5A and 5B are schematic diagrams illustrating the operation of the adjusting mechanism of the first embodiment. 5A and 5B are schematic diagrams illustrating the operation of the adjusting mechanism of the first embodiment.

[Example 1]
FIG. 1 is a diagram illustrating a configuration of an entire muffler including a vehicle muffler mounting position adjusting device according to a first embodiment. 1A is a plan view and FIG. 1B is a left side view. The muffler has a front tube 1 connected to an engine (not shown), a center muffler 2, and a rear muffler 3. The front tube 1 includes a spherical joint 11 connected to the engine side, a first tube 10a, a catalyst 12 arranged between the first tube 10a and the second tube 10b, and a center muffler 2 of the second tube 10b. And a spherical joint 13 connected to the side.

  The center muffler 2 has a center first exhaust pipe 20a, a main muffler 20, a center second exhaust pipe 20b, and a center third exhaust pipe 23. A spherical joint 20a1 is provided on the second tube 10b side of the center first exhaust pipe 20a. A flexible tube 22 is provided between the center second exhaust pipe 20b and the center third exhaust pipe 23. On the rear muffler 3 side of the center third exhaust pipe 23, there is a joint 23 a connected to the rear muffler 3. The main muffler 20 is fixed to the vehicle body via damper rubbers 21a attached to three hangers.

  The rear muffler 3 includes a rear first exhaust pipe 31, a sub muffler 30, a rear second exhaust pipe 32, and a finisher 33. On the center muffler 2 side of the first rear exhaust pipe 31, there is a joint 31b connected to the center muffler 2. The rear first exhaust pipe 31 is fixed to the vehicle body via a damper rubber 31a attached to a hanger. The rear second exhaust pipe 32 is fixed to the vehicle body via a damper rubber 32a attached to a hanger. The adjusting mechanism 4 is provided between the second rear exhaust pipe 32 and the damper rubber 32a. The adjusting mechanism 4 will be described in detail later. The finisher 33 is located in a through hole that opens in the bumper 5 of the vehicle shown by a dotted line. The finisher 33 is arranged such that the outer diameter shape of the opening of the finisher 33 is along the outer diameter shape of the bumper 5, thereby improving the design and reducing the air resistance.

  FIG. 2 is a perspective view showing a vehicle muffler adjusting mechanism of the first embodiment. The adjusting mechanism 4 according to the first embodiment includes a first plate 41 attached to the rear second exhaust pipe 32 in the vicinity of the finisher 33, and a hanger 42a configured as a separate member from the first plate 41 and attached to the vehicle body side. The second plate 42, and the bolt member 43 penetrating the first plate 41 and the second plate 42.

  The first plate 41 is fixed so as to extend from the second rear exhaust pipe 32 to the left in the vehicle left-right direction. The first plate 41 includes a plate portion 410, an upper surface portion 416 obtained by bending the plate portion 410, a first lateral convex portion 415b formed to project at an end portion of the plate portion 410 on the vehicle left-right direction side, and a plate portion 410 of the plate portion 410. And a first vertical convex portion 414b that is formed to project at the vehicle vertical direction side end portion. A first lateral concave portion 415a is provided at an end portion adjacent to the first lateral convex portion 415b. A first vertical concave portion 414a is provided at an end portion adjacent to the first vertical convex portion 414b. The plate portion 410 has two first elongated holes 413a and 413b through which the bolt member 43 penetrates. The first elongated holes 413a and 413b are formed such that the longitudinal direction is the vehicle left-right direction and the longitudinal directions of both elongated holes are parallel to each other. Locating holes 413c and 413d that define relative initial positions of the first plate 41 and the second plate 42 are provided at positions adjacent to the first elongated holes 413a and 413b.

  The second plate 42 is a plate member that is welded and fixed to the hanger 42 a, and includes a plate portion 420, a side surface portion 425 in which the plate portion 420 is bent, and a second protruding portion formed at the vehicle lateral direction side end portion of the plate portion 420. 2 lateral direction convex part 421. A second lateral concave portion 422 is provided at an end portion adjacent to the second lateral convex portion 421. The plate portion 420 has two second elongated holes 423a and 423b through which the bolt member 43 penetrates. The second elongated holes 423a and 423b are formed such that the vehicle vertical direction is the longitudinal direction and the longitudinal directions of both the elongated holes are parallel to each other. Locating holes 423c and 423d that define relative initial positions of the first plate 41 and the second plate 42 are provided at positions adjacent to the second elongated holes 423a and 423b.

  Here, in the adjusting mechanism 4 when first assembling the muffler to the vehicle, the pin is inserted into the locate hole 413c of the first plate 41 and the locate hole 423c of the second plate 42, and the locate hole of the first plate 41 is inserted. A pin is inserted into the locate hole 423d of the second plate 42 and the pin 413d to define the positional relationship between the first plate 41 and the second plate 42. As a result, the reference position for assembling the muffler can be determined, and the assembling workability can be improved.

  The bolt member 43 has a substantially rectangular bolt plate member 430, and a first bolt 431 and a second bolt 432 that are erected on the bolt plate member 430. The tips of the first bolt 431 and the second bolt 432 are formed with screw grooves in which the nut 44 meshes. The first bolt 431 of the bolt member 43 penetrates the second oblong hole 423b of the second plate 42 and the first oblong hole 413b of the first plate 41. The second bolt 432 of the bolt member 43 penetrates the second elongated hole 423a of the second plate 42 and the first elongated hole 413a of the first plate 41. Then, the nut 44 is screwed into the thread groove and sandwiched between the bolt plate member 430 and the nut 44, thereby defining the relative position between the first plate 41 and the second plate 42.

  Here, when the 1st plate 41 and the 2nd plate 42 are piled up, the bolt member 43 is assembled, and when it sees from the axial direction of the 1st and 2nd bolts 431 and 432, the 1st horizontal direction convex of the 1st plate 41 The portion 415b is provided at a position corresponding to the second lateral recess 422 of the second plate 42. In other words, the first lateral convex portion 415b of the first plate 41 is set so as to be located outside the lateral concave portion 422 of the second plate 42. Similarly, the second lateral convex portion 421 of the second plate 42 is set so as to be located outside the lateral concave portion 415a of the first plate 41. Further, the lower end portion 424 of the second plate 42 is set so as to be located outside the first vertical recess 414a of the first plate 41. In this way, by forming the protruding portion protruding from the bolt axial direction, when adjusting the relative position between the first plate 41 and the second plate 42 during assembly, a force is input with a tool such as a hammer. It is easy to do. In addition to the above-mentioned convex portion, the upper and lower surfaces of the upper surface portion 416 and the side surface portion 425 are appropriately used as the locations for inputting to the first plate 41 with a tool such as a hammer.

  3 and 4 are schematic diagrams showing the operation of the adjusting mechanism of the first embodiment. FIG. 3 shows an operation when adjusting the position of the finisher 33 in the vehicle upward direction. In the enlarged view of FIG. 3, the first plate 41 is shown by a dotted line in order to facilitate understanding of the relationship between the second plate 42 and the bolt member 43. As shown in FIG. 3, when adjusting the position of the finisher 33 from the reference position to the vehicle upward direction, loosen the nut 44 slightly within a range in which the first plate 41 and the second plate 42 can move relative to each other. The first vertical convex portion 414b of the 1 plate 41 and the lower surface side of the upper surface portion 416 are struck with a tool such as a hammer to move in the upward direction. Then, the bolt member 43 vertically moves in the second elongated holes 423a and 423b, and the relative position between the first plate 41 and the second plate 42 moves. Then, when the position of the finisher 33 reaches the optimum position, the nut 44 is tightened.

  At this time, the first bolt 431 and the second bolt 432 are integrated by the bolt plate member 430, and are inserted into different long holes, so that the first bolt 431 and the second bolt 432 rotate on their own axis. Since the bolt member 43 does not rotate, it is not necessary to fix the bolt member 43 side when turning the nut 44. Therefore, when performing the assembling work, the worker can adjust the position of the finisher 33 with one hand while tightening the nut 44 with the other hand, and the position can be adjusted by one person.

  FIG. 4 shows the operation when adjusting the position of the finisher 33 in the vehicle left-right direction. As shown in FIG. 4, when the position of the finisher 33 is adjusted from the reference position to the left side of the vehicle, relative movement between the first plate 41 and the second plate 42 is possible as in the case of the action shown in FIG. Loosen the nut 44 slightly within the range and move to the right by hitting the first lateral convex portion 415b of the first plate 41, the second lateral convex portion 421 of the second plate 42, or the side surface portion 425 with a tool such as a hammer. Let Then, the bolt member 43 moves laterally in the first elongated holes 413a and 413b, and the relative position between the first plate 41 and the second plate 42 moves. Then, when the position of the finisher 33 reaches the optimum position, the nut 44 is tightened.

  Here, the rear muffler 3 and the center third exhaust pipe 23 are connected to the center second exhaust pipe 20b via the flexible tube 22. Therefore, even if the center second exhaust pipe 20b is fixed to the vehicle body side of the main muffler 20, the rear muffler 3 and the center third exhaust pipe 23 can move about the flexible tube 22 as a fulcrum, so that the position of the finisher 33 can be accurately adjusted. It can be adjusted well (see the dotted line showing the finisher 33 side from the flexible tube 22 in FIGS.

As described above, in the first embodiment, the operational effects listed below can be obtained.
(1) Front tube 1, center first exhaust pipe 20a and center second exhaust pipe 20b (first exhaust pipe) connected to the engine, and center third exhaust pipe connected via a flexible tube 22 (connection member) 23 and a rear muffler 3 (second exhaust pipe), a device for adjusting a mounting position of a vehicle muffler, which is capable of adjusting a vehicle vertical position and a vehicle lateral position of the center third exhaust pipe 23 and the rear muffler 3. It has a mechanism 4.
Therefore, the position of the rear muffler 3 can be adjusted by using the flexible tube 22 which is a connecting member whose connection angle can be freely changed, and the position of the finisher 33 can be accurately adjusted to a desired position.

(2) The adjustment mechanism 4 extends in the vehicle vertical direction and is connected to the rear second exhaust pipe 32 (second exhaust pipe) of the rear muffler 3, the first plate 41, the first plate 41, and the vehicle longitudinal direction. A second plate 42 arranged side by side and connected to the vehicle body side, first elongated holes 413a, 413b formed in the first plate 41 and having a vehicle left-right direction (predetermined first direction) as a longitudinal direction, and a second plate And a bolt member 43 that penetrates through second elongated holes 423a and 423b that are formed in the vehicle vertical direction (a second direction different from the first direction) and that extend in the vehicle vertical direction.
Therefore, by forming the two plates and the elongated holes formed in the respective plates in different directions, the position of the finisher 33 can be freely adjusted within the plane defined by the vehicle up-down direction and the vehicle left-right direction.

(3) The first elongated holes 413a and 413b are two rows of elongated holes parallel to each other in the longitudinal direction, and the second elongated holes 423a and 423b are two rows of elongated holes parallel to each other in the longitudinal direction. The first and second bolts 431 and 432 are two bolts that penetrate both of the two rows of elongated holes and are erected on the bolt plate member 430 (fixing member).
Therefore, when performing the assembly work, the nut 44 can be tightened with one hand.

(4) A first lateral convex portion 415b (first convex portion) formed at an end portion of the first plate 41 and extending in a direction orthogonal to the axial direction of the first and second bolts 431 and 432. , A second lateral convex portion 421 (second convex portion) formed at an end portion of the second plate 42 and extending in a direction orthogonal to the axial direction of the first and second bolts 431 and 432. When the first plate 41 and the second plate 42 are viewed from the axial direction of the first and second bolts 431 and 432, the first lateral convex portion 415b has a portion protruding outside the second plate 42. The second lateral convex portion 421 has a portion projecting outward from the first plate 41.
Therefore, when adjusting the relative positions of the first plate 41 and the second plate 42 during assembly, it is possible to easily input a force with a tool such as a hammer, and thus fine adjustment is easy. The same effect can be obtained not only in the horizontal convex portion but also in the vertical convex portion.

(5) The first plate 41 and the second plate 42 have locate holes 413c, 413d, 423c, 423d that define the relative initial positions of the first plate 41 and the second plate 42.
Therefore, the reference position at the time of assembling the muffler can be determined, and the assembling workability can be improved.

Although the vehicle muffler mounting position adjusting device of the present invention has been described above based on the embodiment, the present invention is not limited to the above-described configuration, and other configurations are also included in the present invention. For example, in the first embodiment, the flexible tube 22 is used as the connecting member, and the flexible tube 22 is used as the fulcrum for adjustment. However, the flexible tube 22 is not limited to the flexible tube, and a universal joint such as a spherical joint may be used as the fulcrum. Further, even if another hanger and a damper rubber are provided between the joint part serving as the fulcrum and the adjusting mechanism 4, there is no particular problem because the damper rubber has a high degree of freedom of deformation.
Further, in the first embodiment, both the vehicle vertical position and the vehicle horizontal position can be adjusted, but only one of them may be adjustable.
Further, although the position is adjusted by combining the long holes in the first embodiment, the holes are not limited to the long holes, and holes having a larger diameter than the bolt may be combined. The maximum diameter of the large diameter hole is preferably equal to or larger than the nominal diameter of the bolt plus 1 mm from the viewpoint of ensuring the adjustment range.
Further, in the embodiment, an example in which two rows of elongated holes are formed is shown, but the number of rows is not limited to two, and three rows may be formed, or only one row may be formed. Further, in the embodiment, the longitudinal directions of the two rows of elongated holes are formed parallel to each other, but they may not be parallel when the diameter of the elongated holes in the lateral direction is sufficiently larger than the bolt diameter.
Further, in the embodiment, the vehicle vertical direction and the vehicle horizontal direction are combined as the longitudinal direction of the oblong hole, but the longitudinal direction of the oblong hole on the first plate side and the longitudinal direction of the oblong hole on the second plate side intersect. Any combination may be used.

1 Front tube 2 Center muffler 3 Rear muffler 4 Adjustment mechanism 5 Bumper 22 Flexible tube 33 Finisher (exhaust outlet)
41 1st plate 42 2nd plate 43 Bolt member 44 Nut 413a, 413b 1st long hole 413c, 413d, 423c, 423d Locating hole 414a 1st vertical recess 414b 1st vertical projection 415a 1st horizontal recess 415b 1st 1 lateral direction convex part 416 upper surface part 420 plate part 421 2nd lateral direction convex part 422 2nd lateral direction concave part 423a, 423b 2nd long hole 430 bolt plate member 431,432 bolt

Claims (2)

Mounting of a vehicle muffler having a first exhaust pipe connected to an engine and a second exhaust pipe connected through a connection member capable of freely changing a connection angle with the first exhaust pipe and having an exhaust outlet A position adjusting device,
The vehicle vertical position and / or the vehicle left-right direction position of the second exhaust pipe and the body have a adjustable adjusting mechanism,
The adjustment mechanism includes a first plate extending in the vehicle vertical direction and connected to the second exhaust pipe, and a second plate arranged side by side with the first plate in the vehicle front-rear direction and connected to the vehicle body side. ,
A bolt penetrating a first hole formed in the first plate and a second hole formed in the second plate;
Have
The maximum diameter of the first hole and the second hole is equal to or larger than the nominal diameter of the bolt plus 1 mm,
The first hole is a first elongated hole having a predetermined first direction as a longitudinal direction, and the second hole is a second elongated hole having a second direction different from the first direction as a longitudinal direction. Yes,
The first elongated hole is a plurality of rows of elongated holes parallel in the longitudinal direction,
The second elongated hole is a plurality of rows of elongated holes parallel in the longitudinal direction,
A bracket for a vehicle muffler, wherein the bolt is a plurality of bolts penetrating both of the plurality of rows of elongated holes and erected on a fixing member . The mounting position adjusting device for a vehicle muffler according to claim 1 ,
A first convex portion formed at an end of the first plate and extending in a direction orthogonal to the axial direction of the bolt;
A second convex portion formed at an end portion of the second plate and extending in a direction orthogonal to the axial direction of the bolt;
Have
When the first plate and the second plate are viewed from the axial direction of the bolt, the first convex portion has a portion projecting to the outside of the second plate, and the second convex portion is the first convex portion. An attachment position adjusting device for a vehicle muffler, which has a portion projecting outward from one plate.

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