CN2793350Y - Silencing cylinder head - Google Patents

Abstract

The utility model discloses a silencing cylinder head which comprises a cylinder head body. The utility model is characterized in that a liquid storage groove which is used for storing vibration absorbing liquid is manufactured between an air inlet door and an exhaust door arranged on the top of the cylinder head body. The cylinder head utilizes the liquid stored in the liquid storage groove to absorb vibration action to achieve the effect of reducing noise.

Description

The Mute cylinder head

Technical field

The utility model relates to a kind of cylinder head structure, is a kind of Mute cylinder head that can reduce noise specifically.

Background technique

Existing motorcycle engine, rocking arm and valve are installed in the die cavity at cylinder head top, are positioned at the top, firing chamber, and organic oil sprays into and is used for lubricated rocking arm on cylinder head cover, and machine oil flows back to the machine oil chamber by the spill port on the cylinder head again.Fig. 1 shows a kind of structure of bimetal cylinder head, cylinder head 1 top be positioned at firing chamber 10 above a spark plug air channel 2 is arranged, the top in air channel 2 is the flat of bottom that is used to install the die cavity 9 of rocking arm, there is spill port 4 in the left side, and the machine oil that cylinder head cover sprays into flows to spill port 4 from the flat no storage place of die cavity 9.Motor can produce noise in the course of the work, bimetal cylinder head structure, by rocking arm bearing iron core of the casting of embedding on cylinder head, can solve cylinder head and change the noise problem that produces because of the valve clearance that thermal expansion causes, engine noise is reduced, but the noise that other vibration causes to engine cylinder head is then powerless.

The model utility content

The purpose of this utility model then is to provide a kind of Mute cylinder header structure that absorbs noise result that has, and the various vibrations that absorb cylinder head by machine oil reach the purpose that reduces noise.

Mute cylinder head of the present utility model comprises the cylinder head body, it is characterized in that: between cylinder head bodies top inlet and exhaust valve, be processed with hopper from absorbing liquid to recessed being used for that store.

Described hopper is provided with the overflow ducts of the spill port oil extraction on cylinder head apart from bottom land certain altitude place.

Between described hopper and the spill port stiffening rib can be arranged.

On the described cylinder head body also the stiffening rib position between hopper and spill port be embedded with rocking arm bearing iron core.

Described overflow ducts can be made of the through hole on the stiffening rib.

Described hopper is positioned at top of combustion chamber.

For guaranteeing the structural strength of cylinder head, described hopper middle part has stiffening rib that hopper is divided into two-part at least.

Mute cylinder head of the present utility model owing at the cylinder head top hopper is arranged, adds liquid such as machine oil, water in this groove, utilize its absorbing effect to reach the effect that reduces noise.When being provided with oily passage in this hopper and between the spill port of cylinder head, the machine oil that is sprayed in the die cavity of cylinder head top by cylinder head cover can flow in the hopper, make and keep certain liquid level in the hopper, excessive machine oil is circulated machine oil by crossing oily passage inflow spill port, except that reaching the vibration-absorbing denoising effect, also can take away the heat of cylinder head by machine oil, reach the effect of cooling air cylinder head, particularly because the existence of this hopper, the cylinder head body wall thickness of the top of combustion chamber that makes reduces, and more helps heat radiation.By embedding cast iron core, the minimizing valve noise of liquid absorbing and bimetal cylinder head is combined, can reach better quiet effect.

Description of drawings

Fig. 1 is existing cylinder head structural representation.

Fig. 2 figure is a kind of better embodiment schematic representation of Mute cylinder head of the present utility model.

Fig. 3 is the A-A sectional view of Fig. 2.

Fig. 4 is the B-B sectional view of Fig. 2.

Fig. 5 is the core structure schematic representation.

Fig. 6 is the left view of Fig. 5.

Embodiment

Below in conjunction with accompanying drawing and a preferred embodiment Mute cylinder head of the present utility model is described further.

Shown in Fig. 2, Fig. 3 and 4, in cylinder head 1 top die cavity 3, be positioned at 10 top positions, firing chamber, between two valve guide bushings 9, be between the inlet and exhaust valve, be processed with hopper 5 to recessed storage absorbing liquid, can store a certain amount of machine oil in the hopper 5, utilize the absorbing principle of machine oil to reduce the noise of engine cylinder head.

Between hopper 5 and spill port 4, stiffening rib 7 is arranged, to guarantee that cylinder head has sufficient mechanical strength, embedding is cast with rocking arm bearing iron core 8 and is used to install rocking arm on stiffening rib 7, on stiffening rib 7, there is through hole 71 to constitute as shown in Figure 6 from the overflow ducts of hopper 5 to spill port 4 row's machine oil, make and enter in the hopper 5 and the certain liquid level heights of dimension extension from cylinder head cover spray machine oil down, excessive machine oil then can be discharged to spill port 4 by these through hole 71 overflows, simultaneously the heat of cylinder head top of combustion chamber is taken away, reached the effect of cooling air cylinder head.The middle part also has stiffening rib 6 that hopper 5 is separated into two-part in hopper.

Stiffening rib 7 between reduction hopper 5 and the spill port 4 then makes this stiffening rib 7 form overflow weirs to suitable height, also can reach the effect of keeping certain engine oil level in the control hopper 5, then can cancel the through hole 71 on the stiffening rib 7.

Hopper 5 can also can reach the effect of vibration-absorbing denoising sound equally for the airtight chamber of liquid such as contain machine oil.Because of chamber is sealing, the liquid of storage need not be confined to machine oil.

Shown in Fig. 2, Fig. 5 and 6, there are two cylinders 81 rocking arm bearing iron core 8 belows, and as seen from Figure 4, whole rocking arm bearing iron core will be narrower than traditional rocking arm bearing iron core.

Claims (7)

1, a kind of Mute cylinder head comprises the cylinder head body, it is characterized in that: between cylinder head bodies top inlet and exhaust valve, be processed with the hopper that is used for storing absorbing liquid.

2, Mute cylinder head as claimed in claim 1 is characterized in that: described hopper is provided with the overflow ducts to the oil extraction of cylinder head spill port apart from bottom land certain altitude place.

3, Mute cylinder head as claimed in claim 1 or 2 is characterized in that: between described hopper and the spill port stiffening rib is arranged.

4, Mute cylinder head as claimed in claim 3 is characterized in that: also be embedded with rocking arm bearing iron core on the described cylinder head body on the stiffening rib between hopper and the spill port.

5, Mute cylinder head as claimed in claim 4 is characterized in that: cross oily passage and be made of the through hole on the stiffening rib.

6, Mute cylinder head as claimed in claim 1 or 2, it is characterized in that: described hopper is positioned at top of combustion chamber.

7, Mute cylinder head as claimed in claim 1 or 2 is characterized in that: described hopper middle part has stiffening rib that hopper is divided into two-part at least.