CN218267498U

CN218267498U - Exhaust valve cover

Info

Publication number: CN218267498U
Application number: CN202222276363.0U
Authority: CN
Inventors: 李文才
Original assignee: Y & J Industries Co ltd
Current assignee: Y & J Industries Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2023-01-10
Anticipated expiration: 2032-08-29

Abstract

The utility model relates to an exhaust valve cover belongs to valve gap foundry goods processing technology field. The utility model discloses a valve gap body, the bottom of valve gap body has the exhaust valve lid port, the big port of exhaust valve lid, the lateral wall of valve gap body is at the fixed exhaust valve lid flange otic placode that is provided with in the position of being connected with the big port of exhaust valve lid, exhaust valve lid flange otic placode thickness is greater than the casing thickness of valve gap body, be provided with the bolt unthreaded hole on the exhaust valve lid flange otic placode, the region of the lower surface of exhaust valve lid flange otic placode between the lateral wall of bolt unthreaded hole edge and valve gap body is provided with the concave groove, the valve gap body, the big port of exhaust valve lid, the little port of exhaust valve lid, exhaust valve lid flange otic placode, the bolt unthreaded hole is whole to be the integrative structure that the casting takes shape with the concave groove. The utility model discloses can reduce the possibility that produces the casting defect, subtract the manufacturing procedure of machining bolt unthreaded hole simultaneously, can reduce the processing degree of difficulty, reduce the cost.

Description

Exhaust valve cover

Technical Field

The utility model relates to an exhaust valve cover belongs to valve gap foundry goods processing technology field.

Background

The applicant meets the problems of casting defects and lug hole machining of the flange lug plate of the exhaust valve cover when carrying out casting machining of a certain type of exhaust valve cover, the exhaust valve cover part is a thin-wall part as shown in figures 1 and 2, but in order to ensure the connection strength, the flange lug plate of the exhaust valve cover needs to reach a certain thickness, the thickness of the flange lug plate of the exhaust valve cover is larger than the thickness of a shell of a valve cover body, the thickness of the flange lug plate of the exhaust valve cover is uneven, the flange lug hole is not cast in the original casting scheme (the hole is a machined bolt unthreaded hole shown in figure 3 and is obtained by machining in the later period), the structure at the position is made of cold iron during casting, chilling is generated, the hardness is high, a cutter is quickly worn during drilling, and the machining time is wasted. In addition, the casting often generates shrinkage cavity and shrinkage porosity defects at the position of the flange lug plate of the exhaust valve cover (see figure 3), and the product is scrapped.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the exhaust valve cover is low in processing difficulty and high in qualification rate.

The utility model provides a technical scheme that its technical problem adopted is: the exhaust valve cover comprises a valve cover body, the bottom one end of the valve cover body is provided with an exhaust valve cover small port communicated with an inner cavity of the valve cover body, the bottom other end is provided with an exhaust valve cover large port communicated with the inner cavity of the valve cover body, the outer side wall of the valve cover body is fixedly provided with an exhaust valve cover flange lug plate at a connecting part with the exhaust valve cover large port, the thickness of the exhaust valve cover flange lug plate is larger than the thickness of a shell of the valve cover body, a bolt unthreaded hole is formed in the exhaust valve cover flange lug plate, the axial direction of the bolt unthreaded hole is consistent with the thickness direction of the exhaust valve cover flange lug plate, a concave groove is formed in the area between the bolt unthreaded hole edge and the outer side wall of the valve cover body on the lower surface of the exhaust valve cover flange lug plate, the valve cover body, the exhaust valve cover large port, the exhaust valve cover small port, the exhaust valve cover flange lug plate, the bolt unthreaded hole and the concave groove are integrally formed by casting.

Further, the method comprises the following steps: the outer side wall of one side of the valve cover body, far away from the bolt unthreaded hole, is a first arc surface, and the center of a circle of the first arc surface is eccentrically arranged relative to the center of a circle of the bolt unthreaded hole in the direction close to the valve cover body.

Further, the method comprises the following steps: the corner of the inner cavity of the concave groove adopts circular arc transition.

Further, the method comprises the following steps: the small port of the exhaust valve cover and the large port of the exhaust valve cover are both round tubes, and the axes of the small port and the large port of the exhaust valve cover are parallel.

Further, the method comprises the following steps: a reference plane perpendicular to the axis of the large port of the exhaust valve cover is used as a reference plane, a straight line passing through the circle center of the small port of the exhaust valve cover and the circle center of the large port of the exhaust valve cover is used as a symmetry axis, and two flange lug plates of the exhaust valve cover are symmetrically distributed.

Further, the method comprises the following steps: the inner wall of the valve cover body is provided with a plurality of cylindrical intercepting grids in the area opposite to the small port of the exhaust valve cover, and the cylindrical intercepting grids and the valve cover body are of an integrated structure formed by casting.

The utility model has the advantages that: the lower surface of exhaust valve lid flange otic placode is provided with the concave groove in the region between the lateral wall of bolt unthreaded hole edge and valve gap body, can reduce the wall thickness in this position for the thickness in this position diminishes with the casing thickness difference of valve gap body (wall thickness such as realizing as far as possible), thereby makes the casing wall thickness of exhaust valve lid evenly unanimous on the whole, does benefit to casting production, reduces the possibility that produces casting defect. In addition, the valve cover body, the large port of the exhaust valve cover, the small port of the exhaust valve cover, the flange lug plate of the exhaust valve cover, the bolt unthreaded hole and the concave groove are integrally cast and formed into an integral structure, the machining procedure of machining the bolt unthreaded hole is omitted, the machining difficulty can be reduced, and the cost is reduced.

Drawings

FIG. 1 is a front view of a prior art exhaust valve cover;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of a prior art vent cover defect;

fig. 4 is a bottom view of the exhaust valve cover according to the present invention;

fig. 5 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 4.

Labeled as: 1-small port of exhaust valve cover, 2-valve cover body, 3-flange lug plate of exhaust valve cover, 4-large port of exhaust valve cover, 31-casting defect area, 32-machined bolt unthreaded hole, 41-first arc surface, 42-bolt unthreaded hole, 43-concave groove and 5-cylindrical interception grid.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

Please refer to fig. 1 to 5, the utility model discloses a major structure is the same with prior art, including valve gap body 2, valve gap body 2's bottom one end has the exhaust valve lid port 1 of 2 inner chambers of intercommunication valve gap body, the bottom other end has the exhaust valve lid large port 4 of 2 inner chambers of intercommunication valve gap body, valve gap body 2's lateral wall is fixed at the position of being connected with exhaust valve lid large port 4 and is provided with exhaust valve lid flange otic placode 3, exhaust valve lid flange otic placode 3's thickness is greater than valve gap body 2's shell thickness (the shell thickness here indicates valve gap body 2, exhaust valve lid port 1, the holistic shell thickness of exhaust valve lid large port 4, exhaust valve lid port 1, exhaust valve lid large port 4 also is the component part of valve gap body 2), be provided with bolt unthreaded hole 42 on the exhaust valve lid flange otic placode 3, the axial direction of bolt unthreaded hole 42 is unanimous with exhaust valve lid flange otic hole 3's thickness direction. It is understood that the definitions of "large" and "small" in the exhaust valve cover small port 1 and the exhaust valve cover large port 4 mean that the two are referenced to each other, and the diametric dimension of the exhaust valve cover small port 1 is smaller than that of the exhaust valve cover large port 4.

Casting defects commonly occurring in the prior art are shown in the casting defect area 31 of fig. 3, and both exhaust valve cover flange lugs 3 are present.

Referring to fig. 4 and 5, the utility model discloses the region at the lower surface of exhaust valve lid flange otic placode 3 between the lateral wall of bolt unthreaded hole 42 edge and valve gap body 2 is provided with concave groove 43, and valve gap body 2, exhaust valve lid large port 4, exhaust valve lid small port 1, exhaust valve lid flange otic placode 3, bolt unthreaded hole 42 and concave groove 43 are whole to be the integrative structure that the casting takes shape. Due to the fact that the concave groove 43 is formed, the wall thickness of the position can be reduced, the difference between the thickness of the position and the shell thickness of the valve cover body 2 is reduced (equal wall thickness is achieved as far as possible), the side wall thickness of the bolt unthreaded hole 42 is preferably designed according to the shell thickness of the valve cover body 2 (equal wall thickness is achieved as far as possible), and therefore the shell wall thickness of the exhaust valve cover is uniform on the whole, casting production is facilitated, and the possibility of casting defects is reduced. The whole exhaust valve cover is cast, the machining procedure of machining bolt unthreaded holes is omitted, the machining difficulty can be reduced, and the cost is reduced.

Preferably, the outer side wall of the bolt light hole 42 on the side away from the bonnet body 2 is a first circular arc surface 41, and the center of the first circular arc surface 41 is eccentrically arranged relative to the center of the bolt light hole 42 in the direction close to the bonnet body 2. The wall thickness of the bolt unthreaded hole 42 far away from one side of the valve cover body 2 is reduced, so that the overall dimension of the exhaust valve cover flange lug plate 3 can be reduced conveniently, and the casting performance is optimized.

Preferably, the corners of the inner cavity of the concave groove 43 adopt arc transition, which is convenient for forming smooth transition with equal wall thickness, and is beneficial to smooth and uniform flow of liquid fluid during casting, and reduces casting defects.

Preferably, the small port 1 of the exhaust valve cover and the large port 4 of the exhaust valve cover are both round tubes, and the axes of the two are parallel. The design of the circular tube is beneficial to smooth and uniform flow of liquid fluid during casting, and the generation of casting defects is reduced.

Preferably, a reference plane perpendicular to the axis of the large port 4 of the exhaust valve cover is used as a reference plane, a straight line passing through the circle center of the small port 1 of the exhaust valve cover and the circle center of the large port 4 of the exhaust valve cover is used as a symmetry axis, and the two flange ear plates 3 of the exhaust valve cover are symmetrically distributed.

Preferably, a plurality of cylindrical intercepting grids 5 are arranged on the inner wall of the valve cover body 2 in the area opposite to the small port 1 of the exhaust valve cover, and the cylindrical intercepting grids 5 and the valve cover body 2 are of an integrated structure formed by casting. The column-shaped interception grating 5 can increase the structural strength and can intercept sundries from entering the exhaust valve when in use.

The utility model discloses structure and processing method are all comparatively simple, can be applied to the structural design of thin wall foundry goods, reduce because of the unreasonable casting defect that causes of structural design, provide usable scheme for lug type casting promotes quality.

Claims

1. Exhaust valve lid, including valve gap body (2), the bottom one end of valve gap body (2) has exhaust valve lid miniport (1) of intercommunication valve gap body (2) inner chamber, the bottom other end has exhaust valve lid main aspects (4) of intercommunication valve gap body (2) inner chamber, the lateral wall of valve gap body (2) is fixed being provided with exhaust valve lid flange otic placode (3) at the position of being connected with exhaust valve lid main aspects (4), the thickness of exhaust valve lid flange otic placode (3) is greater than the shell thickness of valve gap body (2), be provided with bolt unthreaded hole (42) on exhaust valve lid flange otic placode (3), the axial direction of bolt unthreaded hole (42) is unanimous with the thickness direction of exhaust valve lid flange otic placode (3), its characterized in that: the lower surface of the exhaust valve cover flange lug plate (3) is provided with a concave groove (43) in the area between the edge of the bolt unthreaded hole (42) and the outer side wall of the valve cover body (2), and the valve cover body (2), the exhaust valve cover large port (4), the exhaust valve cover small port (1), the exhaust valve cover flange lug plate (3), the bolt unthreaded hole (42) and the concave groove (43) are integrally cast into a whole structure.

2. The exhaust valve cover according to claim 1, wherein: the outer side wall of one side, away from the valve cover body (2), of the bolt unthreaded hole (42) is a first arc surface (41), and the circle center of the first arc surface (41) is eccentrically arranged relative to the circle center of the bolt unthreaded hole (42) in the direction close to the valve cover body (2).

3. The exhaust valve cover according to claim 1, wherein: the corner of the inner cavity of the concave groove (43) adopts circular arc transition.

4. The exhaust valve cover according to claim 1, wherein: the small port (1) of the exhaust valve cover and the large port (4) of the exhaust valve cover are both round tubes, and the axes of the two are parallel.

5. The exhaust valve cover according to claim 4, wherein: a reference plane perpendicular to the axis of the large port (4) of the exhaust valve cover is used as a reference plane, a straight line passing through the circle center of the small port (1) of the exhaust valve cover and the circle center of the large port (4) of the exhaust valve cover is used as a symmetry axis, and the two flange ear plates (3) of the exhaust valve cover are symmetrically distributed.

6. The exhaust valve cover according to any one of claims 1 to 5, wherein: the inner wall of the valve cover body (2) is provided with a plurality of cylindrical intercepting grids (5) in the area opposite to the small port (1) of the exhaust valve cover, and the cylindrical intercepting grids (5) and the valve cover body (2) are of an integrated structure formed by casting.