CN210858986U

CN210858986U - EGR valve shield structure

Info

Publication number: CN210858986U
Application number: CN201921669108.4U
Authority: CN
Inventors: 陈华; 肖泫岑; 冯志文
Original assignee: Wuxi Tongyi Automobile Power Technology Co ltd
Current assignee: Wuxi Tongyi Automobile Power Technology Co ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-06-26
Anticipated expiration: 2029-10-08

Abstract

The utility model discloses a EGR valve shield structure, it is used for fixed connection on EGR valve main part and disk seat of EGR valve, the shield has a shield first end and one certainly the shield second end that the shield first end extends, wherein the shield first end with EGR valve main part fixed connection is in the same place, the shield second end of shield with disk seat fixed connection is in the same place, thereby makes shield fixed connection in on the EGR valve.

Description

EGR valve shield structure

Technical Field

The utility model relates to an engine exhaust gas recirculation system controlling means especially relates to a EGR valve shield structure.

Background

EGR is called Exhaust Gas Recirculation (EGR) system, which guides part of Exhaust Gas in engine Exhaust back to the air inlet pipe through a pipeline, joins with Gas in the air inlet pipe, and then enters a cylinder for Recirculation, thus effectively reducing the discharge amount of nitrogen oxide (NOx) in the Exhaust Gas. With the stricter and stricter automobile exhaust emission regulations, the function of the EGR valve on the engine is more and more obvious. The EGR valve is used as a key execution element in an engine exhaust gas recirculation system for adjusting the flow of recirculated exhaust gas, and particularly has the function of introducing a small amount of exhaust gas into a cylinder and reducing the temperature in the cylinder to reduce the emission of harmful gases.

The EGR valve faces various complex working environments in an engine cabin, such as oil stain, dust and water vapor brought by high and low temperature, high vibration, high humidity and the like. In such harsh environments, protection of the valve interior is particularly important, and the structure of the dust cap plays a crucial role.

Disclosure of Invention

In view of this, the utility model provides a quality is lighter, simple structure, reliable and stable EGR shield.

In order to achieve the above object, the utility model provides a EGR valve shield structure, it is used for fixed connection on EGR valve main part and disk seat of EGR valve, the shield has a shield first end and one certainly the shield second end that the shield first end extends, wherein the shield first end of shield with EGR valve main part fixed connection is in the same place, the shield second end of shield with disk seat fixed connection is in the same place.

Further, the dust cover has a chamfered surface which reduces the volume of the EGR valve, and when the EGR valve is installed in an engine, the occupied space is reduced due to the design of the chamfered surface.

Further, the first end of the dust cover is provided with a buckle, and the buckle extends forwards from the first end of the dust cover to form the dust cover.

Furthermore, a groove structure which corresponds to and is matched with the buckle of the first end of the dustproof cover is arranged on the EGR valve body, and the buckle of the first end of the dustproof cover and the groove structure of the EGR valve body are mutually clamped together, so that the first end of the dustproof cover is fixedly connected to the EGR valve body.

Further, the second end of the dust cover is provided with a first fixing hole, and the diameter of the first fixing hole and the outer diameter of a screw on the EGR valve are matched with each other.

Further, the valve seat is provided with a second fixing hole, the second fixing hole and the first fixing hole 3 correspond to each other and are matched, and the screw is inserted into the first fixing hole of the second end of the dust cover and the second fixing hole of the valve seat, so that the second end of the dust cover and the valve seat are fixedly connected together; the first end of the dust cover is fixedly connected with the EGR valve body, and the second end of the dust cover is fixedly connected with the valve seat, so that the dust cover is fixedly connected to the EGR valve.

Further, still install an inserts on the inner wall of the first fixed orifices of shield second end of shield for prevent that EGR valve from in the work engineering, the screw vibration ground drops, makes then the shield drops.

Further, the insert is made of Q235 material.

Furthermore, the dust cover still has a boss structure, boss structure certainly the dust cover inner wall to EGR valve main part extends, the groove structure of EGR valve main part with the boss structure of dust cover corresponds each other and the adaptation, that is to say, the boss structure of dust cover with the groove structure of EGR valve main part blocks together each other.

Furthermore, when the boss structure of the dustproof cover and the groove structure of the EGR valve are mutually clamped together, a labyrinth type accommodating groove is formed for preventing impurities such as dust, oil stains and the like of the engine from entering the EGR valve.

Further, the dust cover is integrally cast and formed.

Drawings

FIG. 1 is a diagram showing an EGR valve installation;

fig. 2 is a schematic structural diagram of a dust cap structure of an EGR valve provided in the present invention;

fig. 3 shows that the utility model provides a structural schematic diagram of an EGR valve shield structure.

Detailed Description

The technical solution in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

It is to be understood that the described embodiments are merely some embodiments and not all embodiments of the present application, and that the following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application and its applications.

In the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, detachable connections, or all manner of connections; "coupled" may be direct or indirect through an intermediary. The terms "upper", "lower", and the like indicate orientations or positional relationships based on the manner or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific orientation, be constructed and operated in a specific orientation. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1, a diagram of an EGR valve is shown. As can be seen from the figure, the EGR valve comprises a speed reducer 1, an EGR valve body 10, a dust cover 3 and a valve seat 2, wherein the speed reducer 1 is installed inside the EGR valve body 10, the dust cover 3 has a first dust cover end 31 and a second dust cover end extending from the first dust cover end 31, wherein the first dust cover end 31 of the dust cover 3 is fixedly connected with the EGR valve body 10, and the second dust cover end 32 of the dust cover 3 is fixedly connected with the valve seat 2.

In addition, it is noted that the dust cover 3 has a chamfered surface 33, and the chamfered surface 33 reduces the volume of the EGR valve, and when the EGR valve is installed in an engine, the occupied space is reduced due to the design of the chamfered surface 33.

As shown in fig. 2 and fig. 3, it shows a schematic structural diagram of an EGR valve dust cap structure provided by the present invention. The first end 31 of the dust cover 3 has a latch 312, and the latch 312 extends forward from the first end 31. The EGR valve body 10 is provided with a groove structure 101 corresponding to and fitting with the catch 312 of the first end 31 of the dust cover, and the first end 31 of the dust cover 3 is fixedly connected to the EGR valve body 10 by the catch 312 of the first end 31 of the dust cover and the groove structure 101 of the EGR valve body 10 being engaged with each other.

The second end 32 of the dust cover 3 has a first fixing hole 322, and the diameter of the first fixing hole 322 and the outer diameter of the screw 5 on the EGR valve are matched. The valve seat 2 has a second fixing hole 21, the second fixing hole 21 and the first fixing hole 322 correspond to each other and are adapted to each other, and the screw 5 is inserted into the first fixing hole 322 of the second end 32 of the dust cover 3 and the second fixing hole 21 of the valve seat 2, so as to fixedly connect the second end 32 of the dust cover and the valve seat 2 together. The first end 31 of the dust cap is fixedly coupled to the EGR valve body 10, and the second end 32 of the dust cap is fixedly coupled to the valve seat, such that the dust cap 31 is fixedly coupled to the EGR valve.

In addition, it should be noted that an insert 4 is further installed on the inner wall of the first fixing hole 322 of the second end 32 of the dust cover 3 for preventing the screw 5 from being vibrationally removed during the operation of the EGR valve, and thus the dust cover 3 is removed.

Further, the insert 4 is made of Q235 material.

As shown in fig. 2, the dust cover 3 further has a convex structure 311, the convex structure 311 extends from the inner wall of the dust cover 3 to the EGR valve body 10, and the concave structure 101 of the EGR valve body 10 and the convex structure 311 of the dust cover 3 correspond to and fit with each other, that is, the convex structure of the dust cover 3 and the concave structure 101 of the EGR valve body 10 can be engaged with each other.

Furthermore, when the boss structure 311 of the dust cover 3 and the groove structure 101 of the EGR valve 10 are engaged with each other, a labyrinth accommodating groove 9 is formed to prevent impurities such as dust and oil dirt of the engine from entering the inside of the EGR valve.

The utility model provides a pair of EGR valve shield structure compares in prior art, has following advantage:

the structure is simple, the volume is small, and the weight is light;

the boss structure of the dustproof cover 3 effectively prevents pollutants from entering the valve body, and plays a key role in protecting the valve and prolonging the service life of the valve;

the clamp 4 improves the strength of the dust cap 3 and prevents the dust cap 3 from falling off when the engine vibrates.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An EGR valve dust cap structure, characterized in that, it is used for fixed connection on EGR valve main part and disk seat of EGR valve, the dust cap has a dust cap first end and a dust cap second end that extends from the dust cap first end, wherein the dust cap first end of dust cap with EGR valve main part fixed connection together, the dust cap second end of dust cap with disk seat fixed connection together, thereby make the dust cap fixed connection in on the EGR valve.

2. The EGR valve dust cover structure according to claim 1, wherein said dust cover has a chamfered surface for reducing a space occupied.

3. The EGR valve dust cap structure of claim 1, wherein said dust cap first end of said dust cap has a catch, said catch extending forwardly from said dust cap first end.

4. The EGR valve dust cap structure according to claim 1, wherein a groove structure corresponding to and adapted to the latch of the first end of the dust cap is provided on the EGR valve body, and the latch of the first end of the dust cap and the groove structure of the EGR valve body are engaged with each other, so that the first end of the dust cap is fixedly connected to the EGR valve body.

5. The structure of claim 1, wherein the second end of the dust cap has a first fixing hole, and the diameter of the first fixing hole and the outer diameter of the screw on the EGR valve are adapted to each other.

6. The structure of claim 5, wherein said valve seat has a second fixing hole, said second fixing hole and said first fixing hole 3 are corresponding and adapted to each other, and said screw is inserted into the first fixing hole of said second end of said dust cover and the second fixing hole of said valve seat to fixedly connect said second end of said dust cover and said valve seat together; the first end of the dust cover is fixedly connected with the EGR valve body, and the second end of the dust cover is fixedly connected with the valve seat, so that the dust cover is fixedly connected to the EGR valve.

7. The structure of claim 6, wherein an insert is further installed on an inner wall of the first fixing hole of the second end of the dust cap for preventing the screw from vibrating and falling off during the operation of the EGR valve, so that the dust cap is prevented from falling off.

8. The EGR valve dust cap structure of claim 7, wherein said insert is made of Q235 material.

9. The structure of any one of claims 1 to 8, wherein the dust cover further has a projection structure extending from the inner wall of the dust cover to the EGR valve body, and the groove structure of the EGR valve body and the projection structure of the dust cover correspond to and fit with each other, that is, the projection structure of the dust cover and the groove structure of the EGR valve body are engaged with each other.

10. The EGR valve dust cap structure according to claim 9, wherein the protrusion of the dust cap and the groove of the EGR valve are engaged with each other to form a labyrinth receiving groove for preventing impurities such as dust and oil from entering the EGR valve.