CN204357520U - A kind of structure improved cotter seat - Google Patents

Abstract

The utility model provides a valve spring seat with an improved structure, which belongs to the technical field of internal combustion engine equipment. It solves the problem of low service life of the existing valve spring seat. The valve spring seat of the improved structure includes a seat body, on which a coaxial and connected annular groove and a tapered groove are sequentially opened, a valve lock clip is arranged in the tapered groove, and a valve lock clip is provided in the valve lock clip. The lock clip and the first end protrude from the valve ejector rod on the upper surface of the seat body, and an annular concave rail is also provided on the valve ejector rod, and an annular convex rail corresponding to the annular concave rail is provided on the inner wall of the valve lock clip. An accommodating cavity for storing metal sodium is arranged inside the valve ejector rod, and a base is fixedly connected to the tail end of the valve ejector rod, and a tapered surface is also arranged on the lower surface of the base. The valve spring seat of the improved structure has the advantages of large rotation range of the seat body and long service life.

Description

A Valve Spring Seat with Improved Structure

technical field

The utility model belongs to the technical field of internal combustion engine equipment and relates to a valve spring seat with an improved structure.

Background technique

In the traditional valve mechanism, the valve lifter can rotate in the circumferential direction due to the action of the eccentrically designed cam. During the valve lift process, the pressure of the cam on the valve lifter will change with the valve lift. When the pressure is large enough At this time, the valve can form static friction with the valve lifter so that it can rotate in the circumferential direction.

Chinese Patent Publication No. CN202866910, the title of the invention is a rotatable valve mechanism, which discloses a rotary valve mechanism, including a valve, a valve tappet, a valve spring, a first spring seat, a second spring seat and two valves Lock clip, the side wall of the end of the valve is provided with a lock clip groove, the valve lock clip is nested in the lock clip groove, the first spring seat is sleeved on the outside of the valve lock clip, through the valve lock The clip is fixed on the end of the valve, the second spring seat is sleeved on the outside of the valve and arranged on the cylinder head, and the valve spring is sleeved on the outside of the valve and arranged between the first spring seat and the second spring seat , the top of the inner cavity of the valve tappet is provided with a first connecting portion with a groove, and the top surface of the end of the valve is provided with a second connecting portion matching the groove, and the second connecting portion is matched with the groove Snap. Its disadvantage is that in the process of lifting and lowering the valve lifter, the rotation range of the valve lifter is small, so that the valve is always at a high and unstable temperature, resulting in serious wear of the valve and seat ring, thereby reducing the use of the valve mechanism. life.

Contents of the invention

The purpose of the utility model is to solve the above-mentioned problems in the existing technology, and propose a valve spring seat with an improved structure with a large rotation range of the seat body and a long service life.

The purpose of this utility model can be achieved through the following technical solutions: a valve spring seat with an improved structure, including a seat body, on which there are successively coaxial and connected annular grooves and tapered grooves, and in the tapered grooves A valve lock clip is provided, and a valve ejector rod which runs through the valve lock clip and whose head end protrudes from the upper surface of the seat body is arranged in the valve lock clip, and an annular concave rail is also opened on the valve ejector rod, and on the inner wall of the valve lock clip An annular protruding rail corresponding to the annular concave rail is provided, and an accommodating cavity for storing metal sodium is provided inside the valve ejector rod, and a base is fixedly connected to the tail end of the valve ejector rod, and a bottom surface of the base is also provided with tapered surface.

In the above-mentioned valve spring seat with an improved structure, several strip-shaped protrusions are fixedly arranged on the outer surface of the valve push rod, and several strip-shaped grooves corresponding to the strip-shaped protrusions are opened on the inner wall of the valve lock clip. The strip-shaped protrusion is located in the strip-shaped groove.

In the above-mentioned valve spring seat with an improved structure, the diameter of the tapered groove decreases successively from top to bottom.

In the aforementioned improved valve spring seat, the diameter of the annular groove is greater than the maximum diameter of the tapered groove.

In the above-mentioned valve spring seat with an improved structure, the seat body includes a seat ring, a first connecting portion, and a second connecting portion, which are arranged in sequence and whose diameters are successively reduced, and the annular groove is arranged on the seat ring , the tapered groove is provided on the second connecting portion, and the communication point between the annular groove and the tapered groove is located on the first connecting portion.

Compared with the prior art, the utility model has the following beneficial effects:

1. The utility model includes a seat body, a valve lock clip and a valve ejector rod. A cavity is formed by hollowing out the middle part of the valve ejector rod. The cavity is filled with metal sodium. Due to the low melting point of sodium, it works on the valve spring seat. During the process, sodium can absorb heat and vaporize to the top of the valve ejector rod chamber, reducing the temperature of the valve ejector rod, keeping the valve ejector rod at a relatively low temperature, and improving the service life of the valve ejector rod;

2. A base is fixedly connected to the end of the valve ejector rod, and a cone surface is provided on the base, and the diameter of the cone surface gradually decreases from top to bottom. During the working process of the valve spring seat, the cam is in contact with the cone surface , so that when the cam drives the valve ejector rod to move axially, the friction between the cam and the cone surface can drive the valve ejector rod to rotate in the circumferential direction, and increase the circumferential rotation range of the seat body, thus avoiding the temperature distribution of the seat body Unevenness causes the deformation of the head of the valve ejector pin due to heat.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Fig. 2 is a schematic structural view of the base in a preferred embodiment of the present invention.

Fig. 3 is a schematic structural view of a valve ejector rod in a preferred embodiment of the present invention.

In the figure, 100, seat body; 110, seat ring; 120, first connecting part; 130, second connecting part; 140, annular groove; 150, tapered groove; 200, valve lock clip; 210, annular convex rail ; 220, strip groove; 300, valve ejector rod; 310, annular concave rail; 320, base; 321, cone surface; 330; strip bump.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Figures 1 to 3, the valve spring seat of the improved structure includes a seat body 100, in which a coaxial and communicated annular groove 140 and a tapered groove 150 are successively provided, and the tapered groove 150 is provided with a There is a valve lock clip 200, in which a valve push rod 300 that runs through the valve lock clip 200 and whose head end protrudes from the upper surface of the seat body 100 is provided, and an annular concave rail 210 is also provided on the valve push rod 300, and The inner wall of the valve lock clip 200 is provided with an annular protruding rail 310 corresponding to the annular concave rail 210. The interior of the valve ejector rod 200 is provided with an accommodating cavity for storing metal sodium, and the lower end of the valve ejector rod 300 is fixedly connected with a Base 320.

Preferably, the seat body 100 includes a seat ring 110 , a first connecting portion 120 and a second connecting portion 130 arranged in sequence with decreasing diameters, the annular groove 140 is arranged on the seat ring 110 , and the tapered groove 150 is arranged on the On the second connecting portion 130 , and the joint of the annular groove 140 and the tapered groove 150 is located on the first connecting portion 120 , between the seat ring 110 and the first connecting portion 120 , between the first connecting portion 120 and the second connecting portion 130 There are circular arc surfaces at the joints, which ensures that the valve spring seat will not scratch the surface of other equipment of the diesel engine during installation and work, or even cause damage to other equipment, affecting the normal operation of the diesel engine.

Preferably, the diameter of the annular groove 140 is greater than the maximum diameter of the tapered groove 150, and the diameters of the tapered groove 150 and the valve lock clip 200 are gradually reduced from top to bottom, and an annular groove is provided on the valve push rod 300 rail 310, and the inner wall of the valve lock clip 200 is provided with an annular convex rail 210 corresponding to the annular concave rail 310. During the installation process, the valve lock clip 200 is first connected with the valve ejector rod 300, and then the valve lock clip 200 The valve push rod 300 passes through the annular groove 140 and the tapered groove 150 from top to bottom, and the valve lock clip 200 is matched with the tapered groove 150, so that the valve push rod 300 can only move upward in the axial direction, ensuring The stability of the movement of the valve spring seat enables the valve ejector rod 300 to return to its initial position after the upward ejection action, avoiding the occurrence of excessive displacement of the valve ejector rod 300 and causing the valve ejector rod 300 to affect other equipment of the diesel engine. Cause damage and affect the normal operation of the diesel engine.

Further, a plurality of axially arranged bar-shaped protrusions 330 are fixedly connected to the outer surface of the valve push rod 300 , and bar-shaped grooves corresponding to the plurality of bar-shaped protrusions 330 are provided in the valve lock clip 200 220, the number of bar-shaped protrusions 330 and the number of bar-shaped grooves 220 are four, but the number of bar-shaped protrusions 330 is not limited to four, and the bar-shaped protrusions 330 are located in the bar-shaped grooves 220. During the process, the strip-shaped protrusion 330 on the valve push rod 300 is inserted into the strip-shaped groove 220 of the valve lock clip 200, which ensures the tightness of the connection between the valve push rod 300 and the valve lock clip 200, so that the valve When the spring seat is working, the valve push rod 300 and the valve lock clip 200 move synchronously, which prevents the valve push rod 300 from breaking away from the valve lock clip 200 during the movement, which affects the normal operation of the valve spring seat.

The middle part of the above-mentioned valve push rod 300 is hollowed out to form a cavity, and the cavity is filled with metal sodium. Because the melting point of sodium is low, a large amount of heat is generated during the operation of the valve spring seat, so that the sodium can absorb heat and gasify to rise. To the top of the cavity of the valve ejector 300, the temperature of the valve ejector 300 is reduced, the valve ejector 300 is maintained at a relatively low temperature, and the heat deformation of the valve ejector 300 is avoided, thereby improving the use of the valve ejector 300 life.

Preferably, the lower end of the above-mentioned valve push rod 300 is fixedly connected with a base 320 in the shape of an inverted truncated cone, and a conical surface 321 is provided at the lower end of the base 320, and the diameter of the conical surface 321 gradually decreases from top to bottom. A cam matched with the valve ejector rod 300 is provided, and the cam can drive the valve ejector rod 300 to move upward along the axial direction, and at the same time, when the cam rotates around the rotation axis, the cam contacts the tapered surface 321 of the base 320 to form a Eccentric setting, so that the effect of friction between the cam and the conical base 320 can drive the valve push rod 300 to rotate around the axis line, because the valve lock clip 200 and the valve push rod 300 are respectively provided with strip grooves 220 and strip-shaped protrusion 330, so that the valve lock clip 200 can rotate synchronously with the valve push rod 300 in the circumferential direction, and at the same time, the outer surface of the valve lock clip 200 is in contact with the inner wall of the tapered groove 150, thereby greatly improving the base 100 weeks The rotation range of the direction is improved, thereby improving the heat dissipation of the valve spring, keeping the valve spring seat at a low and stable temperature, increasing the service life of the valve, and avoiding the slow rotation of the valve spring seat in the working process, resulting in the valve spring seat The temperature distribution is not uniform, so that the head of the valve push rod 300 is heated and deformed.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Claims (5)

1. a structure improved cotter seat, comprise pedestal, pedestal offers coaxial and the annular groove communicated and cone tank successively, valve collet is provided with in cone tank, it is characterized in that, be provided with in valve collet and run through valve collet and head end stretches out the valve stem of pedestal upper surface, valve stem also offers annular recessed rail, the inwall of valve collet is provided with the annular protruding rail that rail recessed with annular is corresponding, described valve stem inside is provided with the receiving cavity storing sodium metal, and be fixed with base at the tail end of valve stem, base lower surface is also provided with the conical surface.

2. the structure improved cotter seat of one according to claim 1, it is characterized in that, be connected at valve stem outer surface and be provided with some bar shaped projections, valve collet inwall offers some strip grooves corresponding to bar shaped projection, described bar shaped projection is positioned at strip groove.

3. the structure improved cotter seat of one according to claim 1, is characterized in that, the diameter of described cone tank reduces from top to bottom successively.

4. the structure improved cotter seat of the one according to claim 1 or 3, is characterized in that, the diameter of described annular groove is greater than the maximum diameter of cone tank.

5. the structure improved cotter seat of one according to claim 4, it is characterized in that, described pedestal comprise set gradually and diameter reduce successively seat ring, the first joint and the second joint, described annular groove is arranged on seat ring, described cone tank is arranged on the second joint, and the connection position of described annular groove and cone tank is positioned on the first joint.