CN2634122Y

CN2634122Y - Air valve seat of motorcycle cylinder head

Info

Publication number: CN2634122Y
Application number: CN 03245553
Authority: CN
Inventors: 许炎煌
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-04-21
Filing date: 2003-04-21
Publication date: 2004-08-18
Anticipated expiration: 2013-04-21

Abstract

The utility model discloses an air valve seat of motorcycle cylinder head arranged at the upper end of an engine cylinder, wherein, the air valve seat is provided with a rocker arm to drive the air valve rod arranged on an air inlet-exhaust valve so as to control air inlet-exhaust stroke inside engine. The utility model is characterized in that: the part on the upper end of the cylinder corresponding to air valve is additionally provided with a spring bearing with the shape similar to a bowl; the center of the spring bearing is provided with a through hole for the air valve rod to pass through; an inner ring groove and an outer ring groove are arranged around the central through hole to support the bottoms of an inner and outer springs arranged outside the air valve rod, thereby preventing the springs from directly contacting cylinder surface and avoiding displacement of the springs when the air valve moves under the action of the rocker arm.

Description

A kind of valve seat of motorcycle cylinder head

Technical field

The utility model relates to a kind of valve seat of motorcycle cylinder head, be meant that especially a kind of porthole position that corresponds to is provided with a pair of annular groove spring retainer on valve seat, the circle Shu Dingwei of valve link can be provided by this dicyclo groove spring retainer, and provide the interior outer spring of valve link to stablize sheathed location, make the valve link knee-action more stable.

Background technique

The commonly see power mechanism of motorcycle, as shown in Figure 1, the power by engine 1 produces through pto 11 drive transmission devices 12, and then drives wheel 13.

The generation of engine power, utilize piston in cylinder, to produce through four strokes such as air inlet, compression, blast, exhaust, being equipped with a valve link in the inlet and outlet door of cylinder controls, and keep stable during in order to ensure the valve link knee-action, as shown in Figure 2, outside and be provided with inside and outside supported

spring

21,22 in valve link 2.

Yet, when this inside and outside supported

spring

21,22 is sheathed on valve link 2 outsides, only by lower end cylinder block 23 and upper head plate 24 compactings, do not have any mechanism that prevents its transverse shift, when motorcycle travels on uneven road surface for a long time, in the course of time promptly can cause the displacement or the bending of spring, and then influence circle Shu Dingwei, and then influence the life-span of engine valve link.

Summary of the invention

There is above-mentioned shortcoming in the valve seat of motorcycle cylinder head structure because commonly see, and the utility model designer is studied, improves, and through repeatedly testing generation of the present utility model is arranged eventually.

The purpose of this utility model is to provide a kind of valve seat that makes the motorcycle cylinder head that spring can not be shifted or be out of shape.

For achieving the above object, the technical solution adopted in the utility model mainly is: a kind of valve seat of motorcycle cylinder head, be located at the engine upper end, this valve seat upper end is provided with rocking arm to drive the valve link knee-action of inlet and exhaust valve, and then the air intake-exhaust stroke of Control Engine inside, it is characterized in that: correspond to the porthole position in the cylinder upper end and be provided with a spring retainer in addition, this spring retainer slightly is bowl-type, its central authorities are provided with the through hole that passes through for valve link, then are equipped with inner groove and outer groove in order to the inside and outside spring bottom of support valve link outside around this center through hole.

In other words, according to the valve seat of this kind motorcycle cylinder head of the present utility model, establish a pair of annular groove spring retainer in the external springs lower end of valve link, thereby spring can be shifted or be out of shape.

According to the valve seat of this kind motorcycle cylinder head of the present utility model, its set spring retainer can be made for the material of tool shock absorption, and can damping spring stressed, prolongs spring working life.

Below in conjunction with drawings and Examples, structure of the present utility model and advantage thereof are further described.

Description of drawings

Fig. 1: be the three-dimensional diagrammatic sketch of the motor engine power transmission of commonly seeing.

Fig. 2: be the valve link epimere portion section diagrammatic sketch of commonly seeing.

Fig. 3: be three-dimensional exploded view of the present utility model.

Fig. 4: be combination section of the present utility model.

Embodiment

The valve seat of this kind motorcycle cylinder head of the present utility model is that relevant valve link operating principle is not the utility model emphasis, repeats no more now at the improvement on the composite structure of the valve seat of engine cylinder upper end and the valve link that is driven by it.

Below only at the utility model improvements, conjunction with figs. illustrates:

As Fig. 3, Fig. 4, the valve seat structure of this kind motorcycle cylinder head of the present utility model, its improvements, set up a pair of annular groove spring retainer 4 in valve link 3 outsides, this dicyclo groove spring retainer 4 slightly is bowl-type, in its upper end is provided with,

outer groove

5,6, middle then be provided with the through hole 41 that is equivalent to valve link bar footpath, thus, when its sheathed cylinder outside, not only can provide valve link 3 to pass, and in its upper end,

outer groove

5,6 also provide inner spring 7 and outer spring 8 to be inserted in the location, reach in the circle bundle, outer spring 7,8, in avoiding, outer spring 7,8 displacements or distortion, and then guarantee the stable of valve link 3 knee-actions.

During enforcement, as shown in Figure 4, the setting of dicyclo groove spring retainer 4, but the one side mat increases its lower end friction and strengthens and sticking of cylinder 91 surfaces fixing (for example making its material is plastic cement or rubber material), the aspect then can avoid metal spring 7,8 to contact with being similarly the metal vapour cylinder surfaces in addition, and the shortcoming that has easy slippage to move; And, because the setting of this dicyclo groove spring retainer 4, when it was plastic cement or rubber material, its center through hole 41 further can be in order to circle bundle valve link 3, to guarantee being subjected to rocking arm 9 effect and when presenting quick acting one on the other when valve link 3, still can keep stable, that is, and because of the setting of this dicyclo groove spring retainer 4, can reach the effect of valve link 3, inside and outside spring 7,8 stabilizations synchronously, can effectively avoid because of being given a shock for a long time or external force is out of shape, or displacement, the damage of engine caused.

In sum as can be known, the valve seat of this kind motorcycle cylinder head of the present utility model, by set up in the valve link outside provide in the dicyclo groove spring retainer of outer spring location, can reach really spring can be shifted or be out of shape, prolong spring working life, effectively improve the shortcoming of the valve seat of commonly seeing.

Palpus Chen Ming, the above textural association is the preferable specific embodiment of the utility model, if comply with the change that conception of the present utility model is done, the function of its generation, when not exceeding specification yet and illustrating contained spiritual, all should be included in the scope of the present utility model.

Claims

1, a kind of valve seat of motorcycle cylinder head, be located at the engine upper end, this valve seat upper end is provided with rocking arm, it is characterized in that: correspond to the porthole position in the cylinder upper end and be provided with a spring retainer in addition, this spring retainer slightly is bowl-type, its central authorities are provided with the through hole that passes through for valve link, then are equipped with inner groove and outer groove in order to the inside and outside spring bottom of support valve link outside around this center through hole.

2, the valve seat of motorcycle cylinder head as claimed in claim 1 is characterized in that: described spring retainer is a dicyclo groove spring retainer.

3, the valve seat of motorcycle cylinder head as claimed in claim 1 is characterized in that: described spring retainer, its material can be plastic cement or rubber.