Crankcase assembling surface seal structure

A sealing structure and crankcase technology, applied in the crankcase field, can solve the problems of high dependence on sealing materials and unreliable sealing, and achieve the effects of simple production, increased sealing performance, and enhanced sealing effect

Inactive Publication Date: 2010-10-20
LONCIN MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure is used to seal the joint surface of the crankcase body 4 and the crankcase cover 2 to prevent oil or gas from being exchanged between the inside of the crankcase 1 and the outside of the crankcase. This method only relies on the simple seal of the gasket. It will cause the oil or gas in the crankcase to leak. Therefore, the sealing method of this structure is highly dependent on the sealing material, and there are also disadvantages such as unreliable sealing.

Method used

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  • Crankcase assembling surface seal structure
  • Crankcase assembling surface seal structure
  • Crankcase assembling surface seal structure

Examples

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Embodiment Construction

[0016] refer to figure 1 and figure 2 , the crankcase surface sealing structure, including the crankcase body 4 and the crankcase cover 2, the crankcase body 4 and the crankcase cover 2 are connected by a flange, and the sealing surface is formed on the contact surface of the crankcase body 4 and the crankcase cover 2 5. Form a crankcase inner cavity 1 isolated from the outside world. There is engine oil for lubricating parts in the crankcase inner cavity 1, and combustible gas leaked in the crankcase inner cavity in the cylinder. The engine oil and combustible gas form a mixed oil gas. The end surface of the crankcase cover 2 in contact with the crankcase body 4 is provided with several grooves 6 , the grooves 6 are arc-shaped, and the arc-shaped direction of the grooves is the same as the arc-shaped direction of the sealing surface 5 . The cross-section of the groove 6 is rectangular, or the cross-section of the groove is V-shaped, of course, it can also be grooves of oth...

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Abstract

The invention relates to a crankcase assembling surface seal structure which comprises a crankcase body and a crankcase cover, wherein the crankcase body is connected with the crankcase cover by a flange plate, the contact end surface of the crankcase cover and the crankcase body is provided with a plurality of grooves; the end surfaces of the crankcase cover at both sides of the groove are respectively a first seal surface and a second seal surface; a sealing gasket is arranged between the crankcase cover and the crankcase body and the seal gasket is provided with a first flange and a second flange; the first flange corresponds to the first seal surface of the crankcase cover, and the second flange corresponds to the second seal surface of the crankcase cover. By changing the seal structure of the crankcase assembling surface, the invention uses two seal surfaces to improve the seal reliability, and simultaneously, reduce the dependence of the seal of the crankcase assembling surface for materials.

Description

technical field [0001] The invention relates to a crankcase of an internal combustion engine, in particular to a sealing structure for a combined surface of the crankcase. Background technique [0002] In a small general-purpose internal combustion engine, the sealing of the crankcase is very important. If the crankcase is not well sealed, the oil or / and gas in the crankcase will leak, resulting in oil loss and oil gas leakage. At present, the sealing structure of the crankcase joint surface is: refer to image 3 and Figure 4 , by compressing the gasket 3 between the crankcase body 4 and the crankcase cover 2, the gasket is provided with a flange 7, and the flange is combined with the sealing surface 5 of the crankcase cover to form a sealing surface to play a sealing role. The structure is used to seal the joint surface of the crankcase body 4 and the crankcase cover 2 to prevent oil or gas from being exchanged between the inside of the crankcase 1 and the outside of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F11/00F02F7/00F16J15/06
Inventor 景华阳刘荣利洪方平付强
Owner LONCIN MOTOR
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