CN110748680A - Air exhaust valve - Google Patents

Abstract

An exhaust valve, comprising a valve seat, a valve cover that can be opened or closed relative to the valve seat, a spring sheet fixed on the valve cover, and a bracket fixed on the valve seat and matched with the spring sheet , wherein the valve seat includes a mounting portion and an opening, the valve cover is matched with the opening, the valve cover includes a shaft, and the shaft is installed between the bracket and the mounting portion, when the valve When the cover is opened or closed relative to the opening, the elastic sheet can slide relative to the bracket. The present invention can be realized by simple mechanical assembly by installing the shaft between the bracket and the mounting portion. In addition, the function of opening or closing the valve cover is realized by the elastic sheet, the torsion spring is omitted, and the cost is reduced.

Description

Vent

technical field

The invention relates to an exhaust valve, which is applied to the technical field of engine exhaust systems.

Background technique

US 5,971,098 discloses an exhaust valve, wherein the valve includes a base, a valve cover, and a torsion spring contacting the base and the valve cover. However, because the thermal environment and vibration environment in the automobile exhaust system are very complex, this design has relatively high requirements on the torsion spring. In addition, the structure of this kind of exhaust valve is relatively complicated and the cost is high.

Therefore, it is necessary to design a new type of exhaust valve to solve the above technical problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an exhaust valve with a simple structure and low cost.

In order to achieve the above purpose, the present invention adopts the following technical scheme: an exhaust valve, which includes a valve seat, a valve cover that can be opened or closed relative to the valve seat, a spring sheet fixed on the valve cover, and a valve cover fixed on the valve cover. A bracket on a valve seat and matched with the elastic sheet, wherein the valve seat includes a mounting part and an opening, the valve cover includes a valve cover matched with the opening and a shaft connected with the valve cover, the valve cover The shaft is installed between the bracket and the mounting portion, and when the valve cover is opened or closed relative to the opening, the elastic sheet can slide relative to the bracket.

As a further improved technical solution of the present invention, the valve cover is integrally formed by a metal sheet, and the shaft is formed by winding the metal sheet.

As a further improved technical solution of the present invention, the mounting portion is provided with an inwardly recessed groove, and the shaft is at least partially located in the groove.

As a further improved technical solution of the present invention, the exhaust valve includes a steel wire ring sleeved on the shaft.

As a further improved technical solution of the present invention, the bracket is provided with a fixing portion fixed on the mounting portion, an arc portion for partially wrapping the steel wire ring, and a supporting portion extending obliquely. The shrapnel are in contact.

As a further improved technical solution of the present invention, the support portion is provided with a V-shaped surface in contact with the elastic piece.

As a further improved technical solution of the present invention, the support portion is provided with a reinforcing rib extending to the middle of the V-shaped surface.

As a further improved technical solution of the present invention, the elastic sheet is fixed on the valve cover.

As a further improved technical solution of the present invention, the valve cover has a concave portion facing the opening and used for being pushed by the exhaust gas.

The present invention can be realized by simple mechanical assembly by installing the shaft between the bracket and the mounting portion. In addition, the function of opening or closing the valve cover is realized by the elastic sheet, the torsion spring is omitted, and the cost is reduced.

Description of drawings

FIG. 1 is a schematic perspective view of the exhaust valve of the present invention when the valve cover is in the closed position.

FIG. 2 is a schematic perspective view of FIG. 1 from another angle.

FIG. 3 is a plan view of FIG. 1 .

FIG. 4 is a right side view of FIG. 1 .

FIG. 5 is an exploded perspective view of FIG. 1 .

FIG. 6 is a schematic perspective view of the exhaust valve of the present invention when the valve cover is in the open position.

FIG. 7 is a front view of FIG. 6 .

Detailed ways

Referring to FIGS. 1 to 7 , the present invention discloses an exhaust valve 100 used in an automobile exhaust system. The exhaust valve 100 includes a valve seat 1 and can be opened or closed relative to the valve seat 1 The valve cover 2, the cushion 3 between the valve seat 1 and the valve cover 2, the elastic sheet 4 fixed on the valve cover 2 and the valve seat 1 and the elastic sheet 4 Matching bracket 5.

The valve seat 1 includes a mounting portion 11 and an opening portion 12 on the side of the mounting portion 11 . The mounting portion 11 is provided with an inwardly recessed groove 13 , a first fixing position 14 located on the side of the groove 13 , and a flange portion 15 bent upward from the edges of both sides. In the illustrated embodiment of the present invention, the valve seat 1 is formed by punching a metal sheet, and the groove 13 is formed by punching inward from the mounting portion 11 . Specifically, the groove 13 includes a first groove 131 located in the middle and a second groove 132 located at both ends of the first groove 131 , wherein the width of the second groove 132 is larger than that of the first groove 132 . The width of the groove 131 . The opening portion 12 includes a flat plate portion 121 located on the same side as the groove 13 , an opening 122 passing through the flat plate portion 121 , and a cylindrical portion 123 surrounding the opening 122 , wherein the cylindrical portion 123 protrudes in a direction away from the flat plate portion 121 .

The valve cover 2 is used to cooperate with the opening 122 , and the valve cover 2 includes a shaft 22 , and the shaft 22 is installed between the bracket 5 and the installation portion 11 and at least partially located in the groove 13. When the valve cover 2 is opened or closed relative to the opening 122 , the elastic piece 4 can slide relative to the bracket 5 .

In the illustrated embodiment of the present invention, the valve cover 2 is integrally formed by sheet metal, and the shaft 22 is formed by winding the sheet metal. The exhaust valve 100 includes a steel wire ring 23 sleeved on the shaft 22, the shaft 22 is at least partially installed in the first groove 131, and the steel wire ring 23 is at least partially installed in the second groove 131. in groove 132.

In the illustrated embodiment of the present invention, the valve cover 2 is not in the shape of a flat plate, but has a concave portion 211 facing the opening 122 , which can better contact the exhaust gas.

The cushion pad 3 can be fixed on the flat plate portion 121 or the inner side of the valve cover 2 to reduce the impact of the valve cover 2 and corresponding components and reduce noise when the valve cover 2 is closed.

The elastic piece 4 is fixed on the valve cover 2 , and the elastic piece 4 extends obliquely in the direction of the shaft 22 . The elastic piece 4 includes a holding portion 41 fixed with the valve cover 2 , an extension portion 42 extending further obliquely from the holding portion 41 , and an end portion 43 bent downward from the end of the extending portion 42 . An arc-shaped surface 44 is formed at the connection between the extension portion 42 and the end portion 43 for matching with the bracket 5 . Referring to FIG. 4 , when the valve cover 2 is in the closed position, a gap 45 is provided between the extending portion 42 and the valve cover 2 . In the illustrated embodiment of the present invention, the holding portion 41 is fixed on the valve cover 2 .

The bracket 5 is provided with a fixing portion 51 fixed on the mounting portion 11 , an arc-shaped portion 52 for partially wrapping the wire ring 23 , and a supporting portion 53 extending obliquely. The fixing portion 51 is provided with a second fixing position 511 aligned with the first fixing position 14 . By fixing at the first fixing position 14 and the second fixing position 511 , the bracket 5 and the mounting portion 11 can be fixed. The arc-shaped portion 52 can limit the wire ring 23 to prevent it from being separated from the second groove 132 .

The support portion 53 is in contact with the elastic piece 4 . In the illustrated embodiment of the present invention, the support portion 53 is provided with a V-shaped surface 531 in contact with the elastic piece 4 and a reinforcing rib 532 extending to the middle of the V-shaped surface 531 .

When in use, the exhaust gas of the engine enters the opening 122 from the cylindrical portion 123 and generates an acting force with the recessed portion 211 of the valve cover 2 . When the exhaust pressure is greater than the pressure of the elastic sheet 4 on the valve cover 2, the valve cover 2 is pushed open by the exhaust gas. During this process, the valve cover 2 rotates around the shaft 22 , and at the same time, the arc-shaped surface 44 of the elastic sheet 4 slides along the support portion 53 . Since the V-shaped surface 531 is V-shaped, when the deformation of the elastic piece 4 is larger, the contact area between the elastic piece 4 and the surface 531 is larger, and the friction force generated by the two is larger, so that a larger amount of friction is required. Only the exhaust pressure can further increase the opening of the valve cover 2.

Compared with the prior art, the present invention can be realized through simple mechanical assembly by installing the shaft 22 between the bracket 5 and the installation portion 11 . In addition, the elastic sheet 4 is in contact with the valve cover 2, and the function of opening or closing the valve cover 2 is realized by the elastic sheet 4, the torsion spring is omitted, and the cost is reduced.

The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. The understanding of this specification should be based on those skilled in the art, although the present specification has been described in detail with reference to the above embodiments. However, those of ordinary skill in the art should understand that those skilled in the art can still modify or equivalently replace the present invention, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the within the scope of the claims of the present invention.

Claims (9)

1. The utility model provides an exhaust valve, its includes the disk seat, can be relative the disk seat is opened or the valve gap of closing, is fixed elastic sheet on the valve gap and fix on the disk seat and with elastic sheet matched with support, wherein the disk seat includes installation department and opening, the valve gap with the opening cooperatees, the valve gap contains the axle, the axle is installed the support with between the installation department, work as the valve gap compare in when the opening was opened or was closed, the elastic sheet can for the support slides.

2. The discharge valve according to claim 1, wherein: the valve cover is formed by integrally molding a metal sheet, wherein the shaft is formed by winding the metal sheet.

3. The discharge valve according to claim 1, wherein: the mounting portion is provided with an inwardly recessed groove, and the shaft is at least partially located in the groove.

4. A discharge valve according to claim 3, characterised in that: the exhaust valve comprises a steel wire ring sleeved on the shaft.

5. The discharge valve according to claim 4, wherein: the support is provided with a fixing part fixed on the mounting part, an arc part used for partially wrapping the steel wire ring and a supporting part extending obliquely, and the supporting part is in contact with the elastic sheet.

6. The discharge valve according to claim 5, wherein: the supporting part is provided with a V-shaped surface which is contacted with the elastic sheet.

7. The discharge valve according to claim 6, wherein: the supporting part is provided with a reinforcing rib which is positioned in the middle of the V-shaped surface and extends to the V-shaped surface.

8. The discharge valve according to claim 1, wherein: the elastic sheet is fixed on the valve cover.

9. The discharge valve according to claim 1, wherein: the valve cover has a recess facing the opening and adapted to be pushed by exhaust gas.

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