KR20190079221A - Actuator type EGR valve with integrated adapter - Google Patents

Abstract

The present invention relates to an actuator type exhaust-gas recirculation (EGR) valve with an integrated adapter and, more specifically, relates to an actuator type EGR valve with an integrated adapter, which is provided with an adapter integrated with a bearing instead of a structure in which a bearing pin and a bearing are coupled to an actuator to operate the EGR valve to provide strong durability with a simple structure. Moreover, manufacturing costs can be reduced, and a manufacturing process can be simplified.

Description

[0001] The present invention relates to an actuator type EGR valve having an integral adapter,

The present invention relates to an actuator-type exhaust gas recirculation (EGR) valve having an integral adapter, and more particularly, to an actuator for driving an EGR valve, in which a bearing- To an actuator type EGR valve having an integral adapter capable of reducing the manufacturing cost and simplifying the manufacturing process.

A system in which a part of the exhaust gas discharged from the engine is returned to the intake system to reduce the temperature of the combustion gas inside the engine cylinder so as to suppress the generation of NOx is called an exhaust gas recirculation system (EGR).

The incombustible gas such as CO 2, H 2 O, etc. in the exhaust gas is substituted with a part of the intake air introduced into the cylinder, thereby increasing the heat capacity of the mixer, suppressing the temperature rise of the combustion gas in the cylinder and lowering the excess air ratio, Generation of NOx is reduced by suppressing the generation of NOx.

In general, when an EGR valve that controls the position of a valve by using an electric motor is used as a speed reducer, the valve force can be effectively increased compared to the size of the valve.

FIG. 1 is a perspective view showing an EGR valve according to the prior art, and FIG. 3 is an enlarged view showing bearings, bearing pins and adapters of the EGR valve shown in FIG.

Referring to these drawings, a shaft is vertically driven by using a cam and a guide member.

That is, the cam structure is utilized to convert the motor rotational force for driving the EGR valve into linear motion. The operating path of the sliding member or the rolling member is formed as a groove in the cam in order to stably change the linear motion from the rotational motion of the cam to the shaft.

1 and 3, the size of the cam is increased for forming the groove for the operating path. Further, a space for operation is required, resulting in a problem that the total volume of the EGR valve becomes large. In addition, since a plurality of members are required to be processed in order to realize linear driving, there has been a problem that the manufacturing cost is increased and the manufacturing process is diversified.

Therefore, there is a need for a technique capable of solving the problems of the above-described conventional EGR valve.

Korean Patent Publication No. 10-2011-0060290

In order to solve the problem that a plurality of members are required to be processed in order to realize linear drive due to the complicated structure of the conventional actuator, the manufacturing cost is increased and the manufacturing process is diversified, such a bearing integrated adapter , It is possible to provide an actuator type EGR valve having an integral adapter capable of being durable with a simple structure, capable of reducing the manufacturing cost and simplifying the manufacturing process.

According to an aspect of the present invention, there is provided an EGR valve comprising: a driving force generating unit mounted on one side of an EGR valve to generate a rotational driving force; at least two gears, Shaped cam which is fixed to one end of the rotation shaft and rotates together with the other end of the rotation shaft, and which is capable of being driven by being driven by a bearing, and a plate- It is possible to provide an actuator-type EGR valve having an integral adapter including an adapter for driving up and down and a shaft extending downwardly of the adapter to be vertically driven together with the adapter.

And the groove portion is formed on the plate-shaped cam with a curved shape.

The bearing may be configured to include one main bearing and at least two sub-bearings, a circular main bearing at the center, and four sub-bearings around the main bearing, .

In addition, the main bearing and the sub bearing may be fixedly disposed inside the adapter, and may be vertically driven along the plate-shaped cam together with the adapter.

The present invention provides an actuator type EGR valve equipped with an integral adapter, which requires a plurality of members to be machined in order to realize linear driving due to the complicated structure of the conventional actuator, thereby increasing the manufacturing cost and reducing the manufacturing process There is a merit that a simple structure and durability are obtained, manufacturing cost is reduced, and manufacturing process is simplified.

1 is a perspective view of an actuator having a cam and a guide according to the prior art.
2 is a perspective view of an actuator with a cam and integral adapter according to an embodiment of the invention.
3 is an enlarged view of a cam and guide according to the prior art.
4 is an enlarged view of an actuator having a cam and integral adapter according to an embodiment of the present invention.
5 is an exploded view of an adapter in accordance with an embodiment of the present invention.
6 is an exploded view of an adapter including an insert according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is to be understood that the terms "comprises", "having", and the like in the specification are intended to specify the presence of stated features, integers, steps, operations, elements, parts or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Also, the terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

In addition, the terms "unit," " unit, "" module, " and the like in the description refer to a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software.

In the following description with reference to the accompanying drawings, the same reference numerals are given to the same constituent elements, and a duplicate description thereof will be omitted. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Fig. 1 is a perspective view of an actuator having a cam and a guide according to the prior art, and Fig. 3 is an enlarged view of a cam and a guide according to the prior art.

1 and 3, it is possible to confirm the structure of the adapter 500 having a complicated structure including the bearing pin 530 and the wheel bearing 520 according to the related art.

Such a prior art configuration includes a wheel bearing 520 requiring a plurality of bearings in order to configure one adapter and a bearing pin 530 configuration for connecting the bearing 500 to the adapter 500, 500), there was a problem that more production time and production cost were invested.

Figure 2 is a perspective view of an actuator with a cam and integral adapter according to one embodiment of the present invention and Figure 4 is an enlarged view of an actuator with a cam and integral adapter according to one embodiment of the present invention.

According to an embodiment of the present invention, there is provided a driving force generating apparatus comprising: a driving force generating unit (100) mounted on one side of an EGR valve to generate a rotational driving force; A driving force transmitting portion 200 for transmitting a driving force from the generating portion 100, a rotating shaft 300 extending from the driving force transmitting portion 200, a bearing 510 fixed and rotating together with one end of the rotating shaft 300, An adapter 500 which is driven up and down along the plate-shaped cam 400 together with the bearing 510 and an adapter 500 which is extended downward from the adapter 500 It is possible to provide an actuator type EGR valve having an integral adapter including a shaft 600 which is vertically driven together with the adapter 500. [

In this case, the driving force generating unit 100 may include a motor or the like. The driving force generating unit 100 may generate a rotational force to rotate with a predetermined axis. To rotate the driving force generating unit 100 in a linear motion, the rotational shaft 300 and the plate- .

In addition, the driving force transmitting portion 200 is provided with a plurality of gears meshed to each other to adjust the size of a plurality of meshed gears and the number of teeth, thereby setting a gear ratio.

The plate-shaped cam 400 receiving the driving force from the driving force generating unit 100 and the driving force transmitting unit 200 rotates by a predetermined angle about the rotating shaft 300. The plate shaped cam 400 rotates at a predetermined angle, It is possible for the adapter 500 having the bearings along the shaft 600 to be driven up and down together.

More specifically, the driving force transmitting portion 200 for transmitting the rotational force transmits rotational force according to the set gear ratio to the rotational shaft 300, and the rotational shaft 300 transmits the rotational force transmitted to the plate-shaped cam 400 do.

The plate-shaped cam 400 includes a groove 410 having a predetermined size. The groove 410 has a curved shape. The groove 410 has a curved shape, and the upper end of the poppet type EGR valve, which is always kept up by the EGR valve spring, It is preferable that the shaft 600 is designed to be driven downward.

Therefore, the shape of the groove portion 410 can be adjusted such that the bearing 510 and the adapter 500, which are driven and guided along the groove portion 410 as the plate-shaped cam 400 rotates by a predetermined angle, It is possible to be designed so as to be distant from the center.

The adapter 500 and the shaft 600 that are driven up and down drive a poppet-type EGR valve provided at the lower end of the shaft 600, so that the amount of exhaust gas recirculation can be controlled.

In this case, the groove 410 is preferably formed on the plate-shaped cam with a curved shape.

The bearing 510 may include one main bearing 511 and at least two or more sub bearing units 512. The main bearing 511 may include a circular main bearing 511 disposed at the center of the main bearing 511, It is preferable that four sub-bearings 512 are provided on both sides in a set.

The main bearing 511 and the sub bearing 512 may be fixedly disposed inside the adapter 500 so that the main bearing 511 and the sub bearing 512 may be vertically driven along with the adapter 500 along the plate-

It is possible to put out a configuration that does not include a wheel bearing and a bearing pin as in the prior art through a simple structure in which bearings are disposed inside the adapter 500. [

FIG. 5 is an exploded view of an adapter according to one embodiment of the invention, and FIG. 6 is an exploded view of an adapter including an insert according to an embodiment of the invention.

5 and 6, a structure in which the main bearing and the sub bearing are inserted into the adapter according to a specific embodiment of the present invention will be described.

Figure 5 illustrates the process of dividing the adapter into two or more structures 540 and 550 and machining grooves 513 and 514 into which each of the main and sub- It is possible to provide a structure that allows the main bearing and sub-bearing to rotate with a small friction within a certain space.

It is also possible for the machined portion 515 to be formed so that the adapter divided by the two or more structures 540 and 550 is engaged with the lower shaft.

In addition, it is possible to further process the bolt grooves 516 for engaging the two or more structures 540, 550 after inserting the main bearings and sub-bearings therein.

6 shows a structure in which an insert 560 is inserted into the adapter to fix the main bearing and the sub bearing.

Further, by machining the grooves 513 and 514 into which the main bearing and the sub bearing can be inserted, the main bearing and the sub bearing can be rotated with a small friction within a certain space, It is possible to provide a structure for allowing a user

Specifically, before the insert 560 is inserted into the adapter 500, four sub-bearings are inserted, the main bearing is positioned centrally and the remaining four sub-bearings are positioned with the grease, etc., 560), or insert the four sub-bearings together with the insert 560 at the same time.

By providing such an actuator type EGR valve equipped with the integral adapter, it is required to process a plurality of members in order to realize linear drive due to the complicated structure of the conventional actuator, thereby increasing the manufacturing cost and reducing the manufacturing process A simple structure, durability, and manufacturing cost are reduced, and the manufacturing process is simplified.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100:
200:
300:
400: a plate-shaped cam
410: Groove
500: adapter
510: Bearings
511: Main bearing
512: sub bearing
520: Wheel bearings
530: bearing pin
600: shaft

Claims (5)

A driving force generation unit mounted on one side of the EGR valve to generate a rotational driving force;
A driving force transmitting portion having at least two gears and adjusting a gear ratio and transmitting a driving force from the driving force generating portion;
A rotating shaft extending from the driving force transmitting portion;
A plate-shaped cam fixedly coupled to one end of the rotating shaft and rotatable together therewith, wherein the plate-shaped cam includes a groove capable of being driven by a bearing;
An adapter vertically driving along the plate-shaped cam together with the bearing; And
A shaft extending downward from the adapter and vertically driven together with the adapter;
And an actuator-type EGR valve
The method according to claim 1,
[0028]
And an actuator-type EGR valve having an integral adapter, wherein the actuator-type EGR valve
The method according to claim 1,
The bearing
Wherein the actuator comprises a main bearing and at least two sub-bearings. The actuator-type EGR valve
The method of claim 3,
The bearing
Characterized in that a circular main bearing is located at the center and four sub-bearings are provided on both sides of the main bearing, the four sub-bearings being provided on both sides, and an actuator type EGR valve
5. The method of claim 4,
The main bearing and the sub-
And an actuator-type EGR valve having an integral adapter, wherein the adapter-type EGR valve is fixedly disposed inside the adapter and is driven up and down along the plate-

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