DE112014004245T5 - Manufacturing method of a wound muffler and wound muffler - Google Patents

Abstract

A muffler 10 is a wound muffler formed by inserting an insulating member 20 into an interior of a main body 11 formed in a cylindrical shape, the member 20 having an extendable member 30 extendable in an axial direction. in an outlet pipe 24 for exhaust gas, and after the insulating member 20 is inserted into the interior of the main body 11 with the compressed extendable part 30 of the Dämmelements 20, the extendable part 30 of the Dämmelements 20 is extended or extended to a downstream end 24b of the outlet tube 24 to extend to an outside of the main body 11 out.

Description

TECHNICAL AREA

The present invention relates to a manufacturing technique of a wound muffler.

STATE OF THE ART

There has been disclosed a conventional technique relating to a muffler formed by winding a plate-shaped workpiece around a mold so as to form a cylindrical main body, and by inserting an insulating member into an interior of the main body, i. h., a so-called "wound muffler" (see, for example, Patent Literature 1 below).

Literaturstelleniste

patent literature

• Patent Literature 1: Japanese Patent Application Laid-Open No. 2001-323809

SUMMARY OF THE INVENTION

Technical problem

In the foregoing patent literature, a hole is opened in each cover which covers each passage of the main body formed in a cylindrical shape to expand an inlet pipe and an exhaust pipe for exhaust from an insulating member to an outside of a main body. Each tube of the insulating member extends from the hole formed in each cover to the outside.

In the above-configured prior art, the structure of the wound muffler is limited. In particular, after the main body is formed in a cylindrical shape, it is impossible to insert the insulating member having a longer length in the radial direction than a diameter of each passage of the cylindrical main body into the main body. Therefore, the structure is limited to a structure in which each passage of the main body is covered by each cover after the insulating member is inserted into the main body formed in a cylindrical shape, and then each tube of the insulating member extends from every cover.

In the light of the foregoing situation, the present invention provides a manufacturing method of a wound muffler and a wound muffler capable of enlarging an insulating member in a length larger than a diameter of each passage of a cylindrical main body after the insulating member is inserted into the cylindrical main body, whereby a flexibility of the structure is increased.

the solution of the problem

Problems to be solved by the present invention are as above, and hence means for solving the foregoing problems will be explained.

Specifically, claim 1 proposes a method of manufacturing a wound muffler formed by inserting an insulating member into an interior of a main body formed in a cylindrical shape, the insulating member having an expandable portion extending in an axial direction in at least one of of an exhaust gas inlet pipe and an exhaust gas exhaust pipe, the method comprising: inserting the insulating member into the interior of the main body with the expandable portion of the insulating member being compressed; and thereafter expanding the expansible portion of the insulating member to expand a front end of the tube including the extensible member toward an outside of the main body.

In claim 2, there is provided a wound muffler formed by inserting an insulating member into an interior of a main body formed in a cylindrical shape, the insulating member having an expansible portion in an axial direction in at least one of an inlet pipe for exhaust gas and an outlet pipe for exhaust gas is expandable or extendable.

In claim 3, the expandable portion has mountain-folded portions and valley-folded portions, each mountain-folded portion being a protruding portion when the expandable portion is compressed, and each valley-folded portion is a recessed portion when the expandable portion is compressed; and wherein the mountainous-folded portions and valley-like folded portions are alternately arranged in a direction along a circumferential direction and along the axial direction of the pipe.

According to the present invention, it is possible in a production of the wound muffler, the silencer in a Increase length greater than the diameter of each passage of the cylindrical main body after the insulating member is inserted into the cylindrical main body, whereby a flexibility of the construction of the wound muffler is increased.

BRIEF DESCRIPTION OF THE DRAWINGS

[ 1 ] 1 (a) and 1 (b) FIG. 15 is a perspective view and a plan view, respectively, of a muffler according to a first embodiment. FIG.

[ 2 ] 2 (a) is a drawing showing a manufacturing process of a pipe component, 2 B) FIG. 12 is a drawing showing a process of arranging a contraction part in the pipe member, and FIG 2 (c) Fig. 12 is a drawing showing a process of assembling an expandable tube to an insulating member.

[ 3 ] 3 Fig. 15 is a drawing showing a process of inserting the insulating member into a main body.

[ 4 ] 4 (a) Fig. 13 is a drawing showing a process of expanding the expansible part of the insulating member, and 4 (b) Fig. 15 is a drawing showing a state in which covers are fixed to the main body.

[ 5 ] 5 (a) is a plan view showing a muffler according to a second embodiment, and 5 (b) is a sectional view taken along a line XX of 5 (a) taken.

MODES FOR CARRYING OUT THE INVENTION

Next, embodiments of the invention will be written.

The technical scope of the present invention is not limited to the embodiments mentioned below, and the technical scope of the present invention extends far beyond the entire scope of the technical idea truly intended by the present invention, which is disclosed by the subject matter which are described in the specification and the drawings.

First, with reference to 1 (a) and (b) a schematic configuration of a muffler 10 which is the first embodiment of a muffler according to the present invention. For every component in the muffler 10 For example, stainless steel may be used as a main material thereof. In the present specification, corresponding directions are in the muffler 10 defined using arrows as in 1 (a) and (b) are shown.

As in 1 (a) and (b) shows the muffler 10 According to the present embodiment, a cylindrical main body 11 with passages in a front-rear direction. The main body 11 is by winding a plate-like workpiece around a shape, not shown, bringing both ends thereof to abut against each other, and joining these ends by crimping or welding in a cylindrical shape. The main body 11 The present invention is designed such that a front passage 11a from this has a shorter length in a right-left direction than that of a rear passage 11b (please refer 3 ). The front passage 11a is through a front cover 12 sealed or the rear passage 11b is through a rear cover 13 sealed.

Into the interior of the main body 11 is an insulating element (silencer) 20 used. The insulating element 20 has a first plate-like separator 21 and a second plate-like separator 22 in each of which a number of holes (not shown) is formed. The first separator or the first separator 21 and the second separator and the second separator, respectively 22 are arranged with a space therebetween in the right-left direction and the first separator 21 is to the right of the second separator 22 arranged.

The interior of the main body 11 in the muffler 10 is through the first separator 21 and the second separator 22 into a first expansion space R1, a second expansion space R2 and a third expansion space R3 in an order from upstream of the exhaust gas (the right side in the muffler 10 ) divided up.

The element 20 has an inlet tube 23 that the exhaust gas from an outside of the muffler 10 to the first expansion space R1, and an outlet pipe 24 on which the exhaust gas from the third expansion space R3 to the outside of the muffler 10 leads.

In particular, the inlet pipe has 23 an upstream end 23a located on a front outside of the muffler 10 located, and the inlet pipe 23 extends from the upstream end 23a in a backward direction through a hole in the front cover 12 is open, in the second expansion space R2. Further, the inlet pipe 23 at about 90 ° in the second expansion space R2 bent to extend to the right and extends through the first separator 21 through, leaving a downstream end 23b from this enters the first expansion space R1. This way, the inlet pipe brings 23 the front outside of the muffler 10 to be in communication with the first expansion space R1.

The outlet pipe 24 has an upstream end 24a located in the third expansion space R3 and the outlet pipe 24 extends from the upstream end 24a in the rightward direction and extends through the second separator 22 and the first separator 21 , In addition, the outlet pipe extends 24 through a hole 11c (please refer 4 (a) and (b)) on a right side of the muffler 10 is open, and a downstream end 24b from this extends to a right outside of the muffler 10 , In this way brings the outlet pipe 24 the third expansion space R3 to the right outside of the muffler 10 to communicate.

An upstream end 25a an exhaust pipe 25 is with the downstream end 24b the outlet pipe 24 connected. The exhaust pipe 25 is arranged to be bent at about 90 ° so that a downstream end 25b extending therefrom in the rearward direction.

As mentioned above, the muffler is 10 According to the present embodiment designed such that the exhaust gas via the inlet pipe 23 from the outside of the muffler 10 is introduced to the first expansion space R1, and the exhaust gas is further passed through the holes formed in the first separator 21 and the second separator 22 are opened or formed, alternately further into the second expansion space R2 and introduced into the third expansion space R3, and then via the outlet pipe 24 and the exhaust pipe 25 from the third expansion space R3 to the outside of the muffler 10 directed. In this process, exhaust noise from a vehicle body with the muffler 10 reduced.

In the muffler 10 according to the present embodiment, the insulating element 20 an expandable or extendable part 30 in the axial direction (right-left direction) in the outlet pipe 24 is extensible or extendable. In particular, as in 2 B) are shown in a center of an extendable tube 30P bergartig folded sections Lu to be projecting sections, if the extendable part 30 is compressed, and valley folded portions Ld to be recessed portions, if the extendable part 30 is compressed, alternately arranged in a direction along a circumferential direction and along the axial direction of the tube, whereby the extendable part 30 is formed to be extendable or extendable in the right-left direction. The extendable tube 30P is as the downstream end 24b the outlet pipe 24 connected. The insulating element 20 is in the interior of the skin body 11 used in a state in which the extendable part 30 is compressed and thereafter becomes the extendable part 30 extended or extended. This will be the downstream end 24b , which is a front end of the outlet pipe 24 including the extendible part 30 is, to the outside of the main body 11 extended or extended.

Next, with reference to 2 to 4 every step of making the muffler 10 described.

First, as in 2 (a) is shown, a plate-like member B subjected to bending, as indicated by an arrow A, and both ends of which are caused to touch each other and to be joined by a weld to a pipe member P. The manufacturing process of the pipe member P may be omitted, and an all-purpose shingling pipe may be used as the pipe member P.

Next, as in 2 B) shown is the extendable part 30 formed in the pipe member P, whereby the extendable pipe 30P is trained. Specifically, a molding surface of each outer mold Po formed in a recessed shape in a radially outward direction is pressed against the pipe member P in a radially inward direction from an outer peripheral surface of the pipe member P as indicated by arrows Fr of FIG 2 B) is shown, and at the same time, a molding surface of each inner mold Pi, which is formed in a protruding shape in the radially outward direction, against the pipe member P via each sliding member Ps in the radially outward direction of a Inner peripheral surface of the pipe member P is pressed or pressed, as indicated by arrows Fs of 2 B) is shown. This operation is repeatedly performed while displacing the pressing position in an axial direction and in a circumferential direction, thereby alternately forming the mountain-folded portions Lu and the valley-folded portions Ld so as to form the extensible portion 30 in the middle of the shell component 30P train. The cylindrical sections in which no extendable part 30 is formed, each as an end 30a on one side of the outlet tube 24 and an end 30b on the side of the exhaust pipe 25 Are defined. In the present embodiment, the extendable part 30 in a octagonal shape when viewed in the axial direction, however, may have a configuration of folding the extensible part 30 be used in a different polygonal shape. This means that the construction of the extendable part 30 depending on the structure of the muffler 10 , the diameter of the pipe component P and others can be changed.

Next, as in 2 (c) shown is the extendable tube 30P with the insulating element 20 composed. In particular, the end will be 30a of the extendable tube 30P and the downstream side of the outlet pipe 24 joined together by a weld. This will be the extendable part 30 at the outlet pipe 24 in the insulating element 20 arranged. The end 30b of the extendable tube 30P serves as the downstream end 24b the outlet pipe 24 ,

Next, as in 3 shown is the insulating element 20 including the extendible part 30 in the main body 11 used. At this time, the insulating element (silencer) 20 from the front passage 11a in the main body 11 with the extendable part 30 , which is contracted (reduced in length in the right-left direction), inserted as indicated by an arrow B in FIG 3 is shown. It can be designed that the insulating element 20 instead of the rear passage 11b out into the main body 11 is used.

Next, as indicated by dotted lines W1 in FIG 4 (a) is shown, corresponding front ends of the first separator 21 and the second separator 22 to one end of the front passage 11a of the main body 11 joined or connected by welding. At the same time, corresponding rear ends of the first separator become 21 and the second separator 22 to one end of the rear passage 11b of the main body 11 joined or connected by a weld. This will make the insulating element 20 to the main body 11 fixed. It can be designed that the insulating element 20 and the main body 11 be fixed to each other by a method other than welding, such as fastening tools.

As indicated by an arrow P in 4 (a) is shown, a tensile force on the downstream end 24b of the insulating element 20 applied to the extendable or extendable part 30 take off or expand. Thereby, as in 4b is shown becomes the downstream end 24b , which is a front end of the outlet pipe 24 is, through the hole 11c to the outside of the main body 11 extended or extended. The hole 11c can be opened in the plate-like workpiece at a stage before the main body 11 is formed in a cylindrical shape or after the main body 11 is formed in a cylindrical shape.

As in 4b is shown, the front passage 11a through the front cover 12 sealed and the rear passage 11b is through the rear cover 13 sealed. At this time, the inlet pipe 23 in a hole preceding in the front cover 12 was opened, inserted through the front cover 12 be extended through or extended. This will be the upstream end 23a to the front outside of the muffler 10 extends or widened.

As indicated by dotted lines W2 in 4 (b) is the downstream end 24b the outlet pipe 24 to the hole 11c of the main body 11 joined or connected by a weld. This is the downstream end 24b on the main body 11 fixed. Below, as in 1 (b) Shown are the downstream end 24b and the upstream end 25a of the exhaust pipe 25 joined together by a weld, causing the exhaust pipe 25 with the muffler 10 is composed.

As mentioned above, the muffler 10 according to the present embodiment, a wound muffler, which by insertion of the insulating element (Silencer) 20 into the interior of the main body 11 is formed, which is formed in a cylindrical shape, wherein the insulating element 20 the extendable part 30 having, in the axial direction of the outlet pipe 24 is extendable for exhaust gas, and the insulating element 20 is in the interior of the main body 11 with the extendable part 30 of the insulating element 20 which is compressed or contracted, and thereafter becomes the extendable part 30 of the insulating element 20 extended or extended, resulting in the downstream end 24b the outlet pipe 24 to the outside of the main body 11 extends.

As mentioned above, in the muffler 10 according to the present embodiment, after the insulating element 20 in the cylindrical main body 11 is used, the extendable or extendable part 30 of the insulating element 20 extended so as to the downstream end 24b the outlet pipe 24 to the outside of the main body 11 to extend. This makes it possible, the insulating element 20 in a length greater than the diameter (length in the right-left direction) of the front passage 11a of the cylindrical body 11 to increase, thereby providing flexibility of construction of the muffler 10 is enlarged. In particular, without on the construction of a stretching or lengthening of the tube of the Dämmelements 20 from the hole in the front cover 12 or the rear cover 13 is designed to be limited, it is possible to remove the pipe from the hole (hole 11c the present embodiment) incorporated in the main body 11 is designed to extend or expand. In other words, it is possible for the insulating element 20 in a length in a direction (right-left direction in the present embodiment) orthogonal to the direction in which the insulating member 20 in the main body 11 (Front-to-rear direction in the present embodiment) is inserted, so as to extend the tube (outlet tube 24 in the present embodiment).

Next, with reference to 5 (a) and (b) a schematic configuration of a muffler 110 which is the second embodiment of the muffler according to the present invention. After that, appropriate directions are in the muffler 110 defined by using arrows in 5 (a) and (b) are shown.

As in 5 (a) and (b) shows the muffler 110 According to the present embodiment, a cylindrical main body 111 with passages in the right-left direction. The left passage of the main body 111 is through a left cover 112 is the right passage from this through a right cover 113 sealed.

Inside the main body 111 is an insulating element (silencer) 120 used. The insulating element 120 has a first plate-like separator 121 and a second plate-like separator 122 in each of which a number of holes (not shown) is opened or formed. The interior of the main body 111 in the muffler 110 is in the first expansion space R1, the second expansion space R2 and the third expansion space R3 in an order from the upstream side of the exhaust gas (right side in the muffler 110 ) through the first separator 121 and the second separator 122 divided up.

The insulating element 120 has an inlet tube 123 that the exhaust gas from an outside of the muffler 110 to the first expansion space R1, and an outlet pipe 124 on which the exhaust gas from the third expansion space R3 to the outside of the muffler 110 leads out.

As mentioned above, the muffler is 110 According to the following embodiment designed such that the exhaust gas through the inlet pipe 123 from the outside of the muffler 110 is further introduced to the first expansion space R1, the exhaust gas further through the holes in the first separator 121 and in the second separator 122 are formed, in the second expansion space R3 and in the third expansion space R3 is alternately passed and then via the outlet pipe 124 from the third expansion space R3 to the outside of the muffler 10 to be led. In this process, exhaust noise from a vehicle body with the muffler 110 reduced.

In the muffler 110 according to the present embodiment, the insulating element 120 an extendable or extendable part 130 in the axial direction (front-rear direction) in the inlet pipe 123 is extendable or expandable. In particular, as in 5 (a) and (b), mountain-folded portions and valley-folded portions are alternately at a portion of the inlet pipe 123 formed, the an inner peripheral surface of the main body 111 cuts, eliminating the pull-out part 130 is formed, which is extendable in the front-rear direction. The insulating element 120 is in the interior of the main body 111 in the right-left direction with the contracted or contracted extendable part 130 and then the extendable part 130 pulled out or expanded in the front-back direction. This will be a front end of the inlet pipe 123 with the extendable part 130 to the outside of the main body 111 through a hole 111c taken off or extended.

As mentioned above, in the muffler 110 according to the present embodiment, after the element 120 in the cylindrical main body 111 is inserted, the extendable part 130 of the insulating element 120 extended or extended to the front end of the inlet tube 123 to the outside of the main body 111 to extend. Accordingly, it is possible for the insulating element 120 in a length greater than the diameter (length in the front-rear direction) of the passage of the cylindrical body 111 to increase, thereby providing flexibility of construction of the muffler 110 is enlarged. In particular, without relying on the construction of an extension of the pipe of the muffler 120 from the hole in the left cover 112 or in the right cover 113 is designed to be limited, it is possible, the pipe or the pipe from the hole (hole 111c in the present embodiment) incorporated in the main body 111 is designed to extend. In other words, it is possible the damping element 120 in a length in a direction (front-to-back direction in the present embodiment) orthogonal to a direction to lengthen or increase in which the insulating member 120 in the main body 111 (Right-left direction in the present embodiment) is inserted, so as to extend the pipe (inlet pipe 123 in the present embodiment).

In this way, in the muffler according to the present embodiment, the pipe whose front end is extended toward the outside of the main body by expanding the extendable part of the insulating member, at least one of the inlet pipe for the exhaust gas or the outlet pipe for the Be exhaust. It may be configured to provide the extendable portion on both the exhaust gas inlet pipe and the exhaust gas outlet pipe so as to extend each front end thereof toward the outside of the main body.

In the muffler 10 according to the first embodiment and the muffler 110 According to the second embodiment, it is designed that the front end of the tube (outlet tube 24 , Inlet pipe 123 ) with the extendable part ( 30 . 130 ) from the hole ( 11c . 111c ) located in the main body ( 11 . 111 ), but it may be designed that the front end is expanded from a hole formed in one of the covers.

LIST OF REFERENCE NUMBERS

10

silencer

11

main body

20

Insulating element or silencer

24

outlet pipe

24b

downstream end

30

extendable part

INDUSTRIAL APPLICABILITY

According to the present invention, it is possible to enlarge the insulating member in a length larger than the diameter of each passage of the cylindrical main body after the insulating member is inserted into the cylindrical main body, and therefore, the present invention is industrially applicable.

Claims (3)

A manufacturing method of a wound muffler formed by inserting an insulating member into an inside of a main body formed in a cylindrical shape wherein the insulating member has an extendable member that is extendable in an axial direction in at least one of an exhaust gas inlet pipe and an exhaust gas exhaust pipe, the method being as follows: Inserting the Dämmelements in the interior of the main body with the extendable part of the Dämmelements that is contracted; and thereafter, extending the extendable portion of the insulating member to expand a front end of the tube including the extendable member toward an outer side of the main body. A coiled muffler formed by inserting an insulating member into an interior of a main body formed in a cylindrical shape, the insulating member having an extendable member extendable in an axial direction in at least one of an exhaust gas inlet pipe and an exhaust pipe Exhaust pipe for exhaust gas has. A wound muffler according to claim 2, wherein the extensible part has mountain-folded portions and valley-like folded portions, each mountain-like folded portion being a protruding portion if the telescoping portion is contracted, and each taloned-folded portion is a recessed portion if the telescoping portion is contracted, and the mountainous-folded portions and the valley-like folded portions are alternately arranged in a direction along a circumferential direction and along the axial direction of the tube.

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