JP3064997U - Car muffler - Google Patents

Abstract

(57) [Summary] [Problem] To enable the length of a muffler tail to be freely adjusted. SOLUTION: A muffler tail portion has a double structure including an inner tube and an outer tube, and one of the inner tube and the outer tube is formed at an exhaust outlet end of a muffler body, and the other is movable in the front-rear direction. . The length of the muffler tail is adjusted to an arbitrary length, and the inner tube and the outer tube are connected by fixing means.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a muffler for an automobile engine, and more particularly to a muffler having a telescopic adjustment mechanism at a muffler tail.

[0002]

[Prior art]

 A muffler is a device that suppresses the energy of exhaust gas emitted from an engine and its exhaust sound so that it does not become as resistant to the gas flow as possible. The muffler tail is a portion having an exhaust gas exhaust port protruding from the end of the muffler, and is formed by a single cylindrical member. Generally, the muffler tail, which is installed as standard on ordinary passenger cars, is long enough so that its tip (that is, the exhaust port) is located under the bumper behind the vehicle body.

[0003] The muffler is not only a function such as exhaust gas emission and suppression of exhaust sound, but also an important factor for creating a unique appearance of the vehicle. It is desirable that the shape and the like can be adjusted. Further, as described above, since the end of the muffler tail is located below the bumper, there is a disadvantage that the bumper is heavily contaminated by exhaust gas. To solve this problem, it is necessary to lengthen the muffler tail.However, there is no muffler tail that is installed as standard on conventional vehicles, and there is no one that can adjust the length. When it is desired to adjust the length, for example, there is a method using a muffler which is commercially available for replacement. In this method, the muffler attached as standard is removed and replaced with a commercially available one. However, this too cannot be adjusted to any length.

[0004] In view of this point, a product called "muffler cutter" has been used as a product which is attached to an existing muffler tail portion to extend the tail length or increase the diameter of the tail portion to achieve a decorative effect. Are known. A muffler tail movable pipe structure disclosed in Japanese Patent Application Laid-Open No. H10-324163 is also known as the same as the existing muffler cutter.

[0005]

[Problems to be solved by the invention]

 However, this type of known muffler cutter or movable pipe structure has a structure in which the muffler cutter or movable pipe is screwed at one or several places when it is attached to the tail portion. In this case, the female screw hole of the screw is provided on the side of the muffler cutter or the movable pipe, and is not provided on the inner side of the muffler main body, but is fixed by pressing with the tip of the screw. Therefore, it can be installed at any position and the tail length can be adjusted, but the installation is unstable, there is a problem of loosening due to long-term use, and set the desired tail length There was a problem that it took time to work.

[0006] The present invention has been made in view of the above points, and can be stably mounted, and the tail length can be easily set, and the length of the muffler tail can be freely adjusted. An object of the present invention is to provide an automobile muffler having a structure.

[0007]

[Means for Solving the Problems]

 The muffler of the automobile according to the invention has a muffler tail portion including an inner tube and an outer tube fitted to the inner tube, and one of the inner tube and the outer tube is formed at an exhaust outlet end of the muffler body, and the other end is formed. Is movable in the longitudinal direction, and an interengaging structure is provided at a predetermined position on both the inner tube and the outer tube, and the interengaging structure in at least one of the inner tube and the outer tube extends along the length direction. Plural or continuous, the inner pipe and the outer pipe are set in an arbitrary length positional relationship, and both are engaged and fixed via the mutual engaging structure.

According to this invention, the muffler tail portion includes the inner tube and the outer tube fitted to the inner tube, and one of the inner tube and the outer tube is movable in the length direction, and An interengaging structure is provided at a predetermined position on both the inner tube and the outer tube, and the interengaging structure in at least one of the inner tube and the outer tube is provided in plural or continuous along a length direction. The inner tube and the outer tube are set to have an arbitrary length positional relationship, and the two tubes are engaged and fixed via the mutual engagement structure, and the inner tube and the outer tube are provided on both the inner tube and the outer tube. The length of the muffler tail can be easily adjusted by the presence of the engagement structure. Further, the inner pipe and the outer pipe can be stably mounted. When a bolt is used as the engaging and fixing means, the mutual engaging structure may be formed of a bolt through hole or the like provided at a predetermined position. Any engaging structure such as an engaging structure including a groove or a caulking engaging structure including a springy projection and an engaging hole may be used.

Preferably, the muffler for an automobile according to the present invention has a muffler tail portion formed of an inner tube and an outer tube fitted thereto, and one of the inner tube and the outer tube is connected to an exhaust outlet end of a muffler body. The other is movable in the longitudinal direction, and the engaging holes are respectively provided at predetermined positions on both the inner tube and the outer tube, and one of the engaging holes is provided along the length direction. Alternatively, the inner pipe and the outer pipe are set to have an arbitrary length position relationship, and both are fixed by predetermined engagement fixing means via the engagement hole. I do. As the engaging and fixing means, for example, a means composed of a bolt and a nut is preferably used, but a spring pin or any other engaging and fixing means can be used.

Also in this case, the muffler tail portion includes the inner tube and the outer tube fitted to the inner tube, and one of the inner tube and the outer tube is movable in the longitudinal direction, and the inner tube is An engagement hole is provided at a predetermined position on each of the outer tube and the outer tube, and one of the engagement holes is provided in a plural number or a length along the length direction. It is characterized in that they are set in a positional relationship and are fixed by predetermined engaging and fixing means through the engaging holes, and the muff is provided by the presence of the engaging holes provided in both the inner tube and the outer tube. The length of the rattail can be easily adjusted. Further, the inner tube and the outer tube can be securely fixed by the engagement fixing means via the two engagement holes, so that the inner tube and the outer tube can be stably mounted.

[0011]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1A and 1B show an embodiment of a tail portion of a muffler of an automobile according to the present invention, in which FIG. 1A is a side view, and FIG. 1B is a sectional view taken along the line AA in FIG. In the figure, the muffler tail portion according to the present invention has a double structure of an inner tube 1 and an outer tube 2 fitted thereto, and the inner tube 1 is an exhaust outlet end of a muffler body (not shown). (Tail end) 5 and by sliding the outer tube 2 in the length direction (arrow x), the length of the tail portion is adjusted as shown by the broken line 2 '. For example, the inner pipe 1 and the outer pipe 2 are cylindrical, and the outer diameter of the inner pipe 1 and the inner diameter of the outer pipe 2 are substantially equal but not completely equal. In the state where the outer tube 2 is inserted into the inner tube 1, a play is provided between the outer peripheral portion of the inner tube 1 and the inner peripheral portion of the outer tube 2 such that the outer tube 2 can slide smoothly with respect to the inner tube 1. May have. Of course, the inner tube 1 and the outer tube 2 are not limited to cylindrical shapes, but may have any shape.

A bolt 3 and a nut 4 are used as means for fixing the outer tube 2 at an arbitrary length position with respect to the inner tube 1. That is, one hole 6a for inserting the bolt 3 is provided at a predetermined position of the inner tube 1, and a long hole 6b for inserting the bolt 3 is provided in a predetermined range of the outer tube 2 in the longitudinal direction. ing. The bolt 3 penetrates the long hole 6b of the outer tube 2 and the hole 6a of the inner tube 1 and is screwed with a nut 4 arranged inside the inner tube 1 so that the inner tube 1 and the outer tube 2 have a predetermined length. Tighten and fix in position. Since the outer tube 2 is provided with the long hole 6b, it can be freely moved in the front-rear direction, that is, the length direction by the length of the long hole 6b. Therefore, the length of the muffler tail can be adjusted and fixed according to each person's preference only by tightening the bolt 3 and the nut 4 with the outer tube 2 adjusted to an arbitrary length position. In addition, since the bolts 3 and the nuts 4 are tightened through the holes 6a and 6b provided in both the inner pipe 1 and the outer pipe 2, it is possible to securely and stably fix them at a desired length position. it can. By positioning the tip of the muffler tail (that is, the exhaust gas outlet) below or ahead of the rearmost end of the bumper at the rear of the vehicle, dirt on the bumper due to exhaust gas can be reduced.

FIG. 2 shows a modification of FIG. 1, in which (a) is a side view, and (b) is a cross-sectional view taken along the line BB in (a). In FIG. 2, bolts 3 and nuts 4 are used as means for fixing the outer tube 2 moving in the longitudinal direction as in FIG. 1, but the outer tube 2 is connected to the bolt 3 instead of the long hole 6b. A plurality of holes 6c are provided. The plurality of holes 6c are arranged along the moving direction of the outer tube 2, and the outer tube 2 is adjusted to an arbitrary length position so that one hole 6c on the outer tube 2 side and the hole 6a on the inner tube 1 side are formed. The length of the muffler tail can be freely adjusted by tightening with the bolt 3 and the nut 4 in a state where is matched.

In each of the above embodiments, the inner pipe 1 is fixed to the muffler main body, and the outer pipe 2 is slid forward and backward. On the contrary, the outer pipe 2 is connected to the muffler main body. A structure in which the inner tube 1 is slid in the front-rear direction while being fixed may be employed. FIG. 3 shows an example in which the inner pipe 1 is slid in the front-rear direction, whereby the length of the muffler tail is freely adjusted. 3A is a side view, and FIG. 3B is a cross-sectional view taken along line CC in FIG. 3, the bolt 3 and the nut 4 are used as the engagement fixing means as in the embodiment of FIG. 1, and the inner tube 1 is provided with a long hole 6b, and the outer tube 2 is provided with one hole 6a. I have. 2, a plurality of holes 6c may be provided in the inner tube 1 instead of the long holes 6b.

FIG. 4 shows an example in which the shape of the end of the outer tube 2 movable in the front-rear direction (the inner tube 1 when the inner tube 1 is made movable) is changed. The opening (that is, the exhaust gas outlet) at the tip of the outer pipe 2 is formed obliquely so as to slightly protrude from the upper part of the muffler tail when the muffler is mounted on the vehicle. This is for the purpose of improving appearance and decorativeness. In addition to this, for example, there may be a shape in which the diameter gradually decreases toward the tip (discharge port), or a shape in which the cross section of the tip becomes rectangular. The shape of the muffler tail can be any shape as long as the mechanism does not interfere with the mechanism.

In the above-described embodiment, the bolt 3 and the nut 4 are used as the engagement fixing means for connecting the inner pipe 1 and the outer pipe 2. Means may be used. Further, the structure for mutual engagement provided on both the inner tube 1 and the outer tube 2 is not limited to the holes (6a to 6c), and an appropriate mutual engagement structure may be employed. For example, an arbitrary engaging structure such as an engaging structure including a key and a key groove or a swaging engaging structure including a springy projection and an engaging hole may be used. It should be noted that one of the double-structured pipes (the outer pipe 2 in the examples of FIGS. 1 and 2) is engaged with the long hole 6b or the plurality of holes 6c provided through the bolt 3 in the other pipe. It is preferable that the number of the holes 6a provided in the (inner tube 1) is only one. This is because, if there are two or more holes 6a, the holes 6a to 6c that are not engaged with the bolt 3 may overlap with each other, which is not preferable because exhaust gas leaks from that portion. In this regard, if there is only one hole 6a, such a disadvantage does not occur. However, it is also possible to provide two or more holes 6a. In this case, the distance between the holes 6a is made longer than the length of the long holes 6b or different from the distance between the holes 6c, for example. The holes 6a to 6c that do not match may be prevented from overlapping each other.

[0017]

[Effect of the invention]

 As described above, according to the present invention, the muffler tail portion is composed of the inner tube and the outer tube fitted thereto, and one of the inner tube and the outer tube is movable in the length direction. In addition, engagement holes are respectively provided at predetermined positions on both the inner tube and the outer tube, and one of the engagement holes is provided in plural or elongate lengthwise directions. Since the two tubes are set to have an arbitrary positional relationship with each other and fixed by a predetermined engagement fixing means through the engagement holes, the engagement holes provided in both the inner tube and the outer tube are provided. Due to the presence of, there is an excellent effect that the length of the muffler tail can be easily adjusted. Further, since the inner pipe and the outer pipe can be securely fixed by the engagement fixing means via both the engagement holes, an excellent effect of being able to be stably mounted is exhibited. In this way, the length of the muffler can be freely adjusted, making it possible to personalize the appearance of the car according to hobbies and preferences, and to reduce the dirt on the bumper due to exhaust gas. This is an excellent effect.

[Brief description of the drawings]

FIG. 1 is a side view and a cross-sectional view showing an embodiment of an automobile muffler according to the present invention.

FIG. 2 is a side view and a sectional view showing another embodiment of the muffler for a vehicle according to the present invention.

FIG. 3 is a side view and a cross-sectional view showing still another embodiment of the automobile muffler according to the present invention.

FIG. 4 is a side view showing a modified example of the muffler of the vehicle according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner pipe 2 Outer pipe 3 Bolt 4 Nut 5 Tail end 6a, 6b, 6c hole of muffler body

Claims (3)

[Utility model registration claims] 1. A muffler tail portion comprises an inner tube and an outer tube fitted to the inner tube. One of the inner tube and the outer tube is formed at an exhaust outlet end of a muffler body, and the other is formed in a longitudinal direction. It is movable, and an engagement hole is provided at a predetermined position on both the inner tube and the outer tube, and one of the engagement holes is provided in a plurality or a length along the length direction. A muffler for an automobile, wherein the outer tube and the outer tube are set in an arbitrary length positional relationship and both are fixed by predetermined engagement fixing means through the engagement hole. 2. The vehicle muffler according to claim 1, wherein said engaging and fixing means includes a bolt. 3. A muffler tail portion includes an inner tube and an outer tube fitted to the inner tube, and one of the inner tube and the outer tube is formed at an exhaust outlet end of the muffler body, and the other moves in the length direction. It is possible to provide an inter-engaging structure at a predetermined position on both the inner tube and the outer tube, and the inter-engaging structure on at least one of the inner tube and the outer tube is provided plurally or continuously along the length direction A muffler for a motor vehicle, wherein an inner pipe and an outer pipe are set in an arbitrary length positional relationship and both are engaged and fixed via the mutual engaging structure.