KR100547562B1 - Valve Spring Retainer for Intake / Exhaust Valve of Automobile Engine - Google Patents

Abstract

The present invention discloses a valve spring retainer for an intake / exhaust valve of an automotive engine, which has excellent shock absorbing performance due to improvement of durability and strength while preventing reduction of engine efficiency through light weight of the material.

In the configuration of the present invention, in the valve spring retainer for an intake / exhaust valve of an automobile engine, in the center is formed a hole in which the valve stem end is mounted, and a flange is formed in the outer diameter direction so that the valve spring is seated on one outer end surface. The base material of the valve spring retainer is made of duranium, and a titanium layer is formed on the inner circumferential surface of the valve spring retainer in contact with the stem end mounting portion of the hole, and a high strength synthetic resin is formed between the titanium layer and the duranium material part. A primary shock absorbing layer is formed, and a secondary shock absorbing layer formed of a high elasticity O-ring is formed on the outer circumferential surface of the flange, and a third shock absorbing layer formed of a high strength synthetic resin is formed on the valve spring seat of the outer circumferential surface of the valve spring retainer. It is characterized by.

Intake / exhaust valve, spring, retainer, quadruple, shock absorption, titanium, duranium, high strength synthetic resin, high elasticity

Description

Valve Spring Retainer for Intake / Exhaust Valve of Automobile Engine}             

1 is a longitudinal sectional view showing an example of a conventional valve spring retainer;

2 is a perspective view of a partial cross section showing another example of a conventional valve spring retainer,

3 is a longitudinal sectional view showing a valve spring retainer according to the present invention;

4 is a perspective view of a partial cross section of the valve spring retainer of FIG. 3, FIG.

5 is a longitudinal sectional view showing another example of the present invention.

<Explanation of symbols for main parts of the drawings>

1: Valve stem 1a: Stem end

2a: hole 2b: flange

3: fixed key 4: valve spring

D: Duranium material part T: Titanium layer

L1: first shock absorbing layer L2: second shock absorbing layer

L3: 3rd shock absorbing layer

The present invention relates to a valve spring retainer, and more particularly to a valve spring for an intake / exhaust valve of an automobile engine in which the shock absorbing structure of the retainer supporting the valve spring is improved among the components of the valve mechanism for opening and closing the intake / exhaust of the automobile engine. It is about retainers.

An internal combustion engine, that is, an engine of an automobile, is provided with an intake / exhaust valve mechanism for allowing air and fuel to be sucked and the combustion gas to be discharged by opening and closing the intake and exhaust ports provided in the combustion chamber, respectively. Such a valve mechanism for intake / exhaust is usually composed of a valve composed of a valve head and a stem to directly open or close the intake / exhaust mechanism, a camshaft, a valve lifter, a push rod, a rocker arm, etc. for operating the valve.

In particular, a valve spring is installed on the outer circumferential side of the valve stem to maintain airtightness while the valve is closed, and the valve spring is supported by a valve spring retainer, which has a hole in the center of the valve spring retainer. And the stem is mounted with a stem end that impacts the valve lifter or rocker arm.

1 shows an example of a conventional valve spring retainer, in which a hole 20a through which the valve stem 10 penetrates is formed at the center, and above the hole 20a is attached to the stem end 10a. The structure in which the key insertion groove 20b for inserting the fixed key 30 to be inserted therein is formed. By the way, since such a conventional valve spring retainer is made of a steel material, there is a problem that causes a decrease in engine efficiency due to a large weight.

In order to solve this problem, Korean Patent Registration No. 232036 discloses a valve spring retainer made of a synthetic resin material having good wear resistance and heat resistance. However, the synthetic resin valve spring retainer has an advantageous effect in terms of material weight reduction, but it is difficult to expect satisfactory results in terms of durability and strength required in consideration of the impact force applied to the stem end.

Meanwhile, as shown in FIG. 2, Korean Patent Registration No. 226475 has a valve spring having a double structure in which a part is made of polyamide 4.6 and the other part is made of polyamide 4.6 containing 30 to 50% by weight of glass fiber. Although the retainer is disclosed, in this case, it is still less than expected in terms of durability and strength.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The object of the present invention is to reduce the engine efficiency by reducing the weight of the material and to improve the durability and strength of the vehicle engine. It is to provide a valve spring retainer for a valve.

In order to achieve the above object, the valve spring retainer for an intake / exhaust valve of an automobile engine according to the present invention has a hole in which a valve stem end is mounted at a center thereof, and a flange is formed at an outer circumferential surface thereof so that the valve spring is seated at one end of the outer peripheral surface thereof. In the valve spring retainer for the intake and exhaust valves of an automobile engine,

The base material of the valve spring retainer is made of duranium, and a titanium layer is formed on the inner circumferential surface of the valve spring retainer in contact with the stem end mounting portion of the hole, and a high strength synthetic resin is formed between the titanium layer and the duranium material part. A primary shock absorbing layer is formed, and a secondary shock absorbing layer formed of a high elasticity O-ring is formed on the outer circumferential surface of the flange, and a third shock absorbing layer made of high strength synthetic resin is formed on the valve spring seating portion of the outer circumferential surface of the valve spring retainer. Characterized in that formed.

Here, the high-strength synthetic resin of the primary shock absorbing layer and the third shock absorbing layer may be embodied in any one selected from the group consisting of polyether ether ketone resin and polyamideimide resin, the high elastic O-ring of the secondary shock absorbing layer It may be embodied as urethane resin.

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

3 and 4 are respectively a longitudinal sectional view and a perspective view of a partial cross section showing a valve spring retainer according to the present invention. As shown, the exterior of the valve spring retainer according to the present invention is, as in the prior art, the hole (2a) through which the valve stem 1 penetrates is formed in the center portion, the stem end (1a) of the valve stem (1) The diameter of this hole 2a is further extended at the location where the fixing key 3 is installed to fix the stem end 1a. In addition, a flange 2b is formed at an outer circumferential surface of one side end of the valve spring retainer, that is, in the upper side, in the outer diameter direction so that the valve spring 4 can be seated.

Here, the feature of the present invention is that the material constituting the valve spring retainer and the forming portion thereof are divided into five as follows.

First, the valve spring retainer of the present invention is made of Duranium as a basic material. Duranium is an alloy that is strong enough to be used as a spacecraft structure, and is light in weight and excellent in absorbing shock.

Next, in the inner circumferential surface of the valve spring retainer surrounding the hole 2a through which the valve stem 1 penetrates, the valve spring retainer is located from a portion adjacent to the stem end 1a mounting portion, that is, the position where the fixing key 3 is located. Up to the upper side of the titanium layer (T) is made. Titanium has excellent corrosion resistance, has a strength comparable to that of carbon steel, and has a low thermal conductivity and a low thermal expansion rate, thus being able to withstand high temperatures in the engine combustion chamber. Thus, titanium serves to further reinforce durability and strength.

A primary shock absorbing layer (L1) is formed between the titanium layer (T) and the durannium material portion (D), the primary shock absorbing layer (L1) is a poly ether-ether-kethone (PEEK) It is made of a high strength synthetic resin such as polyamideimide (Polyamidimide), thereby absorbing the impact generated between the titanium layer (T) and the duranium material portion (D).

On the other hand, a secondary shock absorbing layer (L2) is formed on the outer circumferential surface of the flange (2b) made of a high elastic O-ring such as urethane, thereby secondarily absorbing the impact force transmitted to the duranium material portion (D).

In addition, a third shock absorbing layer (L3) made of a high strength synthetic resin such as polyether ether ketone or polyamideimide is formed at a portion where the valve spring 4 is seated on the outer surface of the valve spring retainer. This prevents surging of the valve spring 4 which may occur.

Figure 5 shows another example of the valve spring retainer according to the present invention, except that only the external shape is different from those illustrated in Figures 3 and 4, in terms of the structural material and the structure of the shock absorbing layer is the same as the above-described example, Detailed description thereof will be omitted.

As described above, the valve spring retainer of the present invention has a quadruple shock absorbing structure made of a titanium alloy (T) and primary to tertiary shock absorbing layers (L1 to L3) as the base material itself is made of a lightweight high strength alloy. Therefore, it effectively absorbs the impact applied in the collision between the valve lifter or rocker arm and the stem end.

The present invention has been described in detail with reference to the embodiments shown in the drawings, but the present invention is not limited thereto, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. Improvements are possible and the true scope of protection of the technical idea disclosed by the present invention will be defined by the appended claims.

As described above, the valve spring retainer for the intake / exhaust valve of the automobile engine according to the present invention is made of a light weight material, which has the effect of improving the efficiency of the engine, and exhibits excellent shock absorption performance according to the durability and strength improvement. It has a great effect on engine life preservation.

Claims (2)

A valve spring retainer for an intake / exhaust valve of an automobile engine is formed in a center thereof, and a hole is formed in which a valve stem end is mounted, and a flange is formed in an outer diameter direction so that a valve spring is seated on one outer peripheral surface thereof. The base material of the valve spring retainer is made of duranium, and a titanium layer is formed on the inner circumferential surface of the valve spring retainer in contact with the stem end mounting portion of the hole, and a high strength synthetic resin is formed between the titanium layer and the duranium material part. A primary shock absorbing layer is formed, and a secondary shock absorbing layer formed of a high elasticity O-ring is formed on the outer circumferential surface of the flange, and a third shock absorbing layer made of high strength synthetic resin is formed on the valve spring seating portion of the outer circumferential surface of the valve spring retainer. A valve spring retainer for intake and exhaust valves of an automobile engine, characterized in that formed. The method of claim 1, The high strength synthetic resin of the primary shock absorbing layer and the tertiary shock absorbing layer is any one selected from the group consisting of polyether ether ketone resin and polyamideimide resin, and the high elastic O-ring of the secondary shock absorbing layer is a urethane resin. Valve spring retainer for intake and exhaust valves of automobile engines.

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