JP2002106322A - Valve for control muffler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve for a control muffler capable of preventing deterioration of gas sealing performance when the valve is closed. SOLUTION: This valve is provided with a valve element 2 mounted on a valve seat 1 disposed on the end part of an exhaust pipe part 11 in a muffler main body through a support shaft 3 to be opened and closed, and a coil spring 5 for energizing the valve in the closing direction by abutting the valve element 2 on a tapered seat surface 16 of the valve seat 1. A heat resisting cushioning seal member 6 is provided on the tapered seal surface 26 side of the valve element 2 abutting on the tapered seat surface 16 of the valve seat 1. The heat resisting cushioning seal member 6 is fixed to the valve element 2 through a fixing member 7 in a portion off the tapered seal surface 26 of the valve element 2 abutting on the tapered seat surface 16 of the valve seat 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust pressure sensitive control muffler valve provided at an end of an exhaust pipe in a muffler and opened and closed by exhaust pressure.

[0002]

2. Description of the Related Art As a conventional valve for a control muffler of this type, for example, as shown in FIG. 4, a tapered seat surface 104 of a valve seat 103 provided at an end of an exhaust pipe 102 in a muffler main body 101. , A valve body 106 that can be opened and closed via a support shaft 105, and a coil spring 107 that abuts the valve body 106 on the tapered seat surface 104 of the valve seat 103 to urge the valve in the closing direction. And a structure in which a cushioning seal member 108 is fixed to the tapered seat surface 104 side of the valve seat 103 (Japanese Patent Laid-Open No.
No. 13131738) is known.

The cushioning seal member 108 is generally made of a heat-resistant wire mesh because it is exposed to high-temperature exhaust gas in the muffler main body. Buffer seal member 1
08 is fixed by spot welding at the tapered seat surface 104 of the valve seat 103.

[0004]

However, in the conventional control muffler valve, the wire mesh cushioning seal member 108 is spot-welded on the tapered seat surface 104 of the valve seat 103 as described above. Because of the fixed structure, as shown in the main part enlarged sectional view of FIG. 5, a large recess 109 is formed in the wire mesh portion of the spot welded portion, and the buffer seal member is locally heated at the time of spot welding. 108 and valve seat 10
There is a problem in that deformation occurs in the tapered seat surface 104 of No. 3, thereby deteriorating the gas sealing property of the valve.

[0005] An object of the present invention is to provide a valve for a control muffler which can prevent deterioration of gas sealing performance when the valve is closed.

[0006]

According to the first aspect of the present invention, a valve seat provided at an end of an exhaust pipe in a muffler main body is provided so as to be openable and closable via a support shaft. A valve for a control muffler comprising: a valve body having a valve body; and a biasing means for abutting the valve body against a seat surface of the valve seat to bias the valve in a direction to close the valve. A heat-resistant cushioning sealing member is provided on the sealing surface side of the valve body, and the heat-resistant cushioning sealing member is fixed to the valve body at a position off the sealing surface of the valve body abutting on the seat surface of the valve seat. Means.

According to a second aspect of the present invention, there is provided a valve body provided at an end of an exhaust pipe portion in a muffler main body so as to be opened and closed via a support shaft, and the valve body is connected to the valve seat. A valve for controlling a muffler, comprising a biasing means for abutting against a seat surface of the valve to bias the valve in a direction to close the valve, wherein a heat-resistant cushioning seal member is provided on a seat surface side of the valve seat; The sealing member is a means fixed to the valve seat at a position off the seat surface of the valve seat where the sealing surface of the valve body contacts.

[0008] The invention described in claim 3 is claim 1 or 2.
In the valve for a control muffler, the heat-resistant buffer seal member is made of a wire mesh and is fixed to the valve body by spot welding.

The invention according to claim 4 is the invention according to claim 1 or 2.
In the valve for a control muffler, the heat-resistant buffer seal member is fixed to the valve body via a fixing member.

[0010]

According to the first aspect of the present invention, as described above, the heat-resistant cushioning sealing member is fixed to the valve body at a position off the sealing surface of the valve body abutting the seat surface of the valve seat. In addition, the smoothness of the sealing portion is maintained by preventing deformation and the like of the heat-resistant cushioning sealing member, and thus, an effect is obtained that the gas sealing performance when the valve is closed can be improved.

According to the second aspect of the present invention, as described above,
The heat-resistant cushioning seal member is fixed to the valve seat at a position off the seat surface of the valve seat where the sealing surface of the valve body abuts, thereby preventing deformation and the like of the heat-resistant cushioning seal member and smoothing the seal portion. Is maintained, whereby the effect that the gas sealing performance when the valve is closed can be improved can be obtained.

According to the third aspect of the present invention, as described above,
Since the heat-resistant buffer seal member is made of wire mesh and fixed by spot welding, an extra fixing member can be omitted to reduce the cost.

According to the fourth aspect of the present invention, as described above,
Since the heat-resistant cushioning seal member is fixed to the valve body via the fixing member, the influence of welding heat on the seal portion can be avoided as compared with a case where the heat-resistant cushioning seal member is directly spot-welded. become.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A control muffler valve according to an embodiment of the present invention corresponds to the first and fourth aspects of the present invention. First, the configuration of a control muffler valve according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing a control muffler valve according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a vertical sectional view taken along the line III-III in FIG. In these figures, 1 is a valve seat, 2 is a valve body,
Reference numeral 3 denotes a support shaft, 4 denotes a bush, 5 denotes a coil spring (biasing member), 6 denotes a heat-resistant cushioning seal member, and 7 denotes a fixed member.

The valve seat 1 has a pipe portion (exhaust pipe portion) 1 connected and fixed to an end of an exhaust pipe P in the muffler main body.
1, a tapered sheet portion 12 extending from the end portion of the pipe portion 11 toward the outside to be improved, and one end of the tapered sheet portion 12 horizontally extending from an outer peripheral edge portion. The substrate part 13 and the shaft support parts 14, 14, which are formed by bending both sides of the base part upward and standing upright, have shaft holes 15, 15 formed in the both shaft support parts 14, 14. The upper surface of the tapered sheet portion 12 is a tapered sheet surface 16.

The valve element 2 includes a main body 21 and the main body 2.
1, a tapered seal portion 22 extending from the outer periphery of the tapered seal portion 22 so as to expand toward the outside, a substrate portion 23 extending horizontally from an outer peripheral edge of one end of the tapered seal portion 22, and both side surface portions thereof The shaft support portions 24, 24 which are bent upward and stand upright are provided with shaft holes 25, 25 in the both shaft support portions 24, 24. The lower surface of the tapered seal portion 22 forms a tapered seal surface 26.

The double shaft support portions 24 of the valve body 2 are located inside the double shaft support portions 14 of the valve seat 1, and the shaft holes 15 of the double shaft support portions 14. Further, by inserting the support shaft 3 into the shaft holes 25, 25 of the both shaft support portions 24, 24, the valve body 2 is attached to the valve seat 1 around the support shaft 3 so as to be openable and closable. The support shaft 3 is fixed by welding both ends of the support shaft 3 outside the both shaft support portions 14.

The bushings 4, 4 are respectively mounted in both shaft holes 25, 25 in the both shaft support portions 24, 24 of the valve body 2. The bushes 4 and 4 are formed by pressing and solidifying a stainless wire mesh, and the shaft holes 25 and 25 of the shaft support portions 24 and the support shaft 3 are used.
A cylindrical main body 41 interposed between the shaft supporting portions 2 and
4 and 24 and an outward flange portion 42 interposed between the shaft support portions 14 and 14.

The coil spring 5 is mounted around the support shaft 3 and has both ends thereof at the main body 21 of the valve body 2.
And the base portion 13 of the valve seat 1 are respectively abutted and engaged, so that the tapered seal portion 22 of the valve body 2 is brought into contact with the tapered seat portion 12 of the valve seat 1 to urge the valve in the closing direction. ing.

The heat-resistant cushioning sealing member 6 is provided on the tapered sealing surface 26 side of the valve body 2 in the embodiment of the present invention. That is, the heat-resistant cushioning sealing member 6 is formed by pressing a stainless wire mesh to form an annular tapered portion 61 along the tapered sealing surface 26 of the valve body 2.
And an annular horizontal portion 62 extending inward from the inner peripheral edge of the annular tapered portion 61 and having a through hole 63 formed in the center.

On the other hand, the fixing member 7 is a member for mounting and fixing the heat-resistant cushioning seal member 6 to the valve body 2 and is formed in a disc shape and has a through hole of the heat-resistant cushioning seal member 6 at the center thereof. A protruding surface portion 71 that can be inserted into 63 is formed. Then, this projecting surface portion 71 is spot-welded to the lower surface of the main body portion 21 of the valve body 2 so that the annular horizontal portion 62 is sandwiched between the main body portion 21 and the outer peripheral edge 72 of the fixing member 7. The mounting and fixing of the heat-resistant buffer seal member 6 to the valve body 2 is performed.

Next, the operation and effect of the embodiment of the present invention will be described. Since the control muffler valve according to the embodiment of the present invention is configured as described above, the fluid force (exhaust pressure) of the exhaust gas flowing through the muffler is small when the engine is running at a low speed. The biasing force exceeds and the valve is kept closed.

When the valve is closed, the annular tapered portion 61 of the heat-resistant cushioning sealing member 6 mounted and fixed to the tapered sealing surface 26 of the valve body 2 is in surface contact with the tapered seat surface 16 of the valve seat 1. Then, the state is maintained with a predetermined urging force.

The heat-resistant cushioning sealing member 6 is connected to the valve seat 1.
The valve body 2 is fixed to the valve body 2 via the fixing member 7 at a position outside the tapered sealing surface 26 of the valve body 2 which abuts on the tapered seat surface 16. Deformation and the like are prevented, and the smoothness of the sealing surface is maintained, so that an effect is obtained that the gas sealing performance when the valve is closed can be improved.

Further, by fixing the heat-resistant cushioning seal member 6 to the valve body 2 via the fixing member 7, the welding heat is more compared with the case where the heat-resistant cushioning seal member 6 is directly spot-welded to the valve body 2. This can avoid the influence on the seal part.

Next, when the engine is running at medium or high speeds, the fluid force (exhaust pressure) due to the exhaust gas flowing through the muffler increases, and the fluid force exceeds the urging force of the coil spring 5 to open the valve. State.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments of the present invention, and even if there is a design change or the like within a range not departing from the gist of the present invention, Included in the present invention.

For example, in the embodiment of the present invention, the seat surface of the valve seat 1 and the sealing surface of the valve body 2 are formed in a tapered shape. The invention can be applied.

In the embodiment of the present invention, the heat-resistant cushioning seal member 6 is provided on the sealing surface side of the valve body 2 as an example. The present invention can be applied.

In the embodiment of the present invention, the annular horizontal portion 62 extending on the inner peripheral side of the heat-resistant cushioning seal member 6 is fixed, but the portion extending on the outer peripheral side is fixed. You may do so.

Further, in the embodiment of the present invention, the example in which the heat-resistant buffer seal member 6 is fixed via the fixing member 7 has been described, but the wire mesh forming the heat-resistant buffer seal member 6 is spot-welded. May be fixed.

In the embodiment of the present invention, a stainless steel wire mesh is used as the heat-resistant cushioning seal member 6, but a brass-based wire mesh may be used.
The material is arbitrary.

The method of fixing the heat-resistant cushioning sealing member 6 is also arbitrary. In addition to spot welding, a normal welding method, a screwing method for screws, bolts and nuts, a fitting method, a caulking method, For example, a bonding method using a conductive adhesive can be used.

[Brief description of the drawings]

FIG. 1 is a plan view showing a control muffler valve according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view taken along the line II-II of FIG. 1 showing the control muffler valve according to the embodiment of the present invention.

FIG. 3 is a longitudinal sectional end view taken along line III-III of FIG. 1 showing the control muffler valve according to the embodiment of the present invention;

FIG. 4 is a longitudinal sectional view showing a conventional control muffler valve.

FIG. 5 is an enlarged end cross-sectional view of a main part of a conventional control muffler valve.

[Explanation of symbols]

 P Exhaust pipe 1 Valve seat 11 Pipe portion (exhaust pipe portion) 12 Tapered seat portion 13 Substrate portion 14 Shaft support portion 15 Shaft hole 16 Tapered seat surface 2 Valve body 21 Main body portion 22 Tapered seal portion 23 Substrate portion 24 Shaft Supporting part 25 Shaft hole 26 Tapered sealing surface 3 Support shaft 31 Welding 4 Bush 41 Cylindrical body part 42 Outward flange part 5 Coil spring (biasing member) 6 Heat-resistant buffer seal member 61 Annular taper part 62 Annular horizontal part 63 Penetration Hole 7 Fixing member 71 Projection surface 72 Outer edge

Claims (4)

[Claims] 1. A valve element provided to be openable and closable via a support shaft with respect to a valve seat provided at an end of an exhaust pipe section in a muffler main body, and the valve element is brought into contact with a seat surface of the valve seat. And a biasing means for biasing the valve in a direction to close the valve, wherein a heat-resistant cushioning seal member is provided on a sealing surface side of the valve body that abuts a seat surface of the valve seat. The valve for a control muffler, wherein the heat-resistant cushioning seal member is fixed to the valve body at a position off the seal surface of the valve body that comes into contact with a seat surface of the valve seat. 2. A valve body provided to be openable and closable via a support shaft with respect to a valve seat provided at an end of an exhaust pipe portion in a muffler main body, and the valve body abuts on a seat surface of the valve seat. And a biasing means for biasing the valve in a direction to close the valve, wherein a heat-resistant buffer seal member is provided on a seat surface side of the valve seat, and the heat-resistant buffer seal member is the valve body. A valve for a control muffler, characterized in that the valve is fixed to a valve seat at a position where a sealing surface of the valve seat comes off a seat surface of the valve seat. 3. The valve for a control muffler according to claim 1, wherein the heat-resistant buffer seal member is made of a wire mesh and is fixed by spot welding. 4. The control muffler valve according to claim 1, wherein the heat-resistant buffer seal member is fixed via a fixing member.