阅读说明：本技术 一种egr阀滑块机构 (EGR valve slider mechanism ) 是由 陈华 肖泫岑 冯志文 于 2019-10-08 设计创作，主要内容包括：本发明揭露了一种EGR阀滑块机构,其包括：一轴承、一滑块和一阀杆,其中所述轴承被固定设置于所述滑块的内部,所述轴承和EGR阀的偏心轮固定连接于一起,所述滑块和所述阀杆固定连接于一起,从而使得EGR阀的偏心轮带动所述轴承一方面做圆周旋转运动,另一方面,带动所述轴承在竖直方向上做直线往复运动,继而带动所述滑块和所述阀杆的固定组件做直线往复运动。(The invention discloses an EGR valve slide block mechanism, which comprises: the bearing is fixedly arranged in the sliding block, the bearing is fixedly connected with the eccentric wheel of the EGR valve, the sliding block is fixedly connected with the valve rod, so that the eccentric wheel of the EGR valve drives the bearing to do circular rotation motion on the one hand, and on the other hand, the bearing is driven to do linear reciprocating motion in the vertical direction, and then the sliding block and the fixing component of the valve rod are driven to do linear reciprocating motion.)

1. The utility model provides a EGR valve slider mechanism, includes a bearing, a slider and a valve rod, wherein the bearing is fixed set up in the inside of slider, the eccentric wheel fixed connection of bearing and EGR valve is in the same place, the slider with valve rod fixed connection is in the same place to make EGR valve's eccentric wheel drive the circumference rotary motion is done on the one hand to the bearing, on the other hand, drives the bearing is straight reciprocating motion on vertical direction, then drives the slider with the fixed subassembly of valve rod is straight reciprocating motion.

2. The EGR valve slider mechanism of claim 1, wherein said slider has a bearing movement track extending axially therethrough for receiving a bearing of said slider mechanism.

3. The EGR valve slider mechanism of claim 2, wherein said bearing travel track has a height greater than an outer diameter of said bearing.

4. The EGR valve slider mechanism of claim 2, wherein said bearing travel track has a width greater than a width of said bearing.

5. The EGR valve slider mechanism of claim 3, wherein the height of said bearing movement track is 0.1mm greater than the outer diameter of said bearing.

6. The EGR valve slider mechanism according to any of claims 1-5, wherein the slider further has a connecting hole, the valve rod is inserted into the connecting hole of the slider, and the valve rod and the slider are welded and fixed together by welding.

7. The EGR valve slider mechanism of claim 6, wherein at least two laser welding tracks are further disposed on the slider, the laser welding tracks are distributed in the region of the connecting hole, the laser welding tracks penetrate through the connecting hole, and after the valve rod is inserted into the connecting hole, the valve rod and the slider are fixedly connected together along the laser welding tracks in a laser welding mode.

8. The EGR valve slider mechanism of claim 7, wherein said laser weld traces are symmetrically distributed on said connecting holes with respect to said bearing movement trace.

9. The EGR valve slider mechanism of claim 8, wherein said laser weld track is T-shaped in cross-section along a direction of a section of said bearing movement track plane.

10. An EGR valve slider mechanism according to any of claims 7-9, wherein the welding between said valve stem and said slider mechanism is laser welding.

Technical Field

The invention relates to a part of an engine exhaust emission control device, in particular to an EGR valve sliding block mechanism.

Background

An electric EGR valve (i.e., an electrically controlled valve) plays a role in regulating and controlling the flow rate of recirculated exhaust gas in an exhaust gas recirculation system of an automobile engine, and changes the opening degree of the valve by controlling the rotation of a motor, thereby changing the flow rate of exhaust gas. During the operation of the electric EGR valve, the slide block mechanism on the electric EGR valve plays an important role, and the rotary motion of the output of the EGF valve is converted into linear motion, so that the EGR valve is opened and closed.

Disclosure of Invention

The present invention provides an EGR valve slider mechanism, comprising: the bearing is fixedly arranged in the sliding block, the bearing is fixedly connected with the eccentric wheel of the EGR valve, the sliding block is fixedly connected with the valve rod, so that the eccentric wheel of the EGR valve drives the bearing to do circular rotation motion on the one hand, and on the other hand, the bearing is driven to do linear reciprocating motion in the vertical direction, and then the sliding block and the fixing component of the valve rod are driven to do linear reciprocating motion.

Further, the sliding block is provided with a bearing moving track which axially penetrates through the sliding block and is used for accommodating a bearing of the sliding block mechanism.

Further, the height of the bearing moving track is larger than the outer diameter of the bearing.

Further, the width of the bearing moving track is larger than that of the bearing.

Further, the height of the bearing moving track is 0.1mm larger than the outer diameter of the bearing.

Furthermore, the sliding block is also provided with a connecting hole, the valve rod is inserted into the connecting hole of the sliding block, and the valve rod and the sliding block are welded and fixed together in a welding mode.

Furthermore, the slider is further provided with at least two laser welding tracks, the laser welding tracks are distributed in the area of the connecting hole, the laser welding tracks penetrate through the connecting hole, and after the valve rod is inserted into the connecting hole, the valve rod and the slider are fixedly connected together along the laser welding tracks in a laser welding mode.

Further, the laser welding tracks are symmetrically distributed on the connecting holes relative to the bearing movement track.

Further, the cross section of the laser welding track along the sectioning direction of the bearing motion track plane is T-shaped.

Further, the welding mode between the valve rod and the sliding block mechanism is laser welding.

Compared with the prior art, the EGR valve sliding block mechanism provided by the invention has the following advantages: 1. the invention adopts the stainless steel-based powder metallurgy technology, reduces the cost on materials, and avoids the stress concentration caused by machining and the time-consuming and labor-consuming cost of machining. 2. The design of the bearing motion track ensures that the bearing realizes complex motion in the track and is in stable transition in the conversion process of rotary motion and linear motion; the problems of abrasion, vibration cracking and the like of the EGR valve in the working process are solved; 3. the design of the welding track improves the welding strength and prolongs the service life.

Drawings

FIG. 1 shows an EGR valve assembly;

FIG. 2 is a cross-sectional view of an EGR valve slider mechanism provided in accordance with the present invention;

FIG. 3 is a front view of an EGR valve slider mechanism provided by the present invention;

FIG. 4 is a cross-sectional view of the EGR valve slider mechanism shown in FIG. 3 taken along section line A-A;

FIG. 5 is a schematic view of the bearing;

FIG. 6 shows a right side view (left side view) of the bearing shown in FIG. 5;

FIG. 7 is a schematic diagram of a slider structure of an EGR valve fixedly connected with a valve stem.

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 invention, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, which shows a configuration diagram of an electric EGR valve, it is known that, during operation of the electric EGR valve, a motor 1 is connected to a reduction gear box 2 to drive the reduction gear box 2 to reduce speed and increase distance, and an output shaft of the reduction gear box 2 is fixedly connected to an eccentric wheel 3, so that a circular rotation motion output by the reduction gear box 2 is converted into a linear reciprocating motion. The eccentric wheel 3 is connected with the sliding block mechanism 10, so that the reduction gear box 2 drives the eccentric wheel 3 to rotate, and then drives the sliding block mechanism 10 to linearly reciprocate in the vertical direction. As shown in fig. 1, the vertical direction is the direction indicated in the drawing.

Specifically, the slider mechanism 10 includes a bearing 6, a slider 5 and a valve rod 4, wherein the bearing 6 is fixedly disposed inside the slider 5, the bearing 6 and the eccentric wheel 3 are fixedly connected together, and the slider 5 and the valve rod 4 are fixedly connected together, so that the eccentric wheel 3 drives the bearing 6 to perform circular rotation motion on one hand, and on the other hand, drives the bearing 6 to perform linear reciprocating motion in the vertical direction, and then drives the fixing components of the slider 5 and the valve rod 4 to perform linear reciprocating motion in the vertical direction.

Referring to fig. 2, a cross-sectional view of an EGR valve slider mechanism according to the present invention is shown. As can be seen from the figure, the slide 5 has a bearing movement track 7, and the bearing movement track 7 axially penetrates the slide 5. The sliding block 5 is used for installing and accommodating the bearing 6, and the bearing 6 moves circularly and linearly in a reciprocating mode in the bearing moving track 7.

Specifically, as shown in fig. 2, 3 and 4, the width L1 of the bearing moving rail 7 is greater than the width L2 of the bearing 6, so that the bearing 6 is always located in the bearing moving rail 7 while linearly reciprocating on the inside of the bearing moving rail 7. The bearing 6 is a standard bearing.

As shown in fig. 3, which shows a front view of fig. 2. As can be seen, the height L3 of the bearing moving rail 7 is greater than the outer diameter of the bearing 6, that is, there is a gap between the bearing 6 and the bearing moving rail 7, so that the bearing 6 moves smoothly when linearly reciprocating in the bearing moving rail 7.

As shown in fig. 2, the slider 5 further has a connecting hole 8, and the connecting hole 8 is used for accommodating the valve rod 4. After the valve rod 4 is inserted into the connecting hole 8, the valve rod 4 and the connecting hole 8 are fixedly connected by welding. Preferably, the welding mode between the valve rod 4 and the connecting hole 8 is laser welding.

As shown in fig. 3, 4 and 7, the slider 5 is further provided with at least two laser welding rails 9, the laser welding rails 9 are distributed in the area of the connecting hole 8, specifically, the laser welding rails 9 penetrate through the connecting hole 8, and after the valve rod 4 is inserted into the connecting hole 8, the valve rod 4 and the slider 5 are fixedly connected together along the laser welding rails 9 by means of laser welding.

More specifically, the laser welding rails 9 are symmetrically distributed on the coupling holes 8 with respect to the bearing moving rail 7.

More specifically, the cross section of the laser welding rail 9 along the section direction of the plane of the bearing rail 7 is T-shaped.

More specifically, the cross section of the laser welding track 9 along the section line a-a is a polygon, preferably a regular hexagon, and the angle between two sides of the regular hexagon is preferably 90 °. The side length of the laser welding track 9 is lengthened, so that the welding side length 10 between the valve rod 4 and the sliding block 5 is lengthened, and the welding strength between the valve rod 4 and the sliding block 5 is increased.

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.