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Seal ring and sealing structure

A sealing structure and sealing ring technology, applied in the direction of engine seals, piston rings, belts/chains/gears, etc., can solve the problem of troublesome replacement of the sealing ring, and achieve the purpose of suppressing touching the front end of the casing, increasing the thickness, maintaining sealing effect

Active Publication Date: 2017-09-26
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the case of AT and CVT for automobiles, damage to the seal ring can be confirmed by inspection after the AT and CVT are assembled, so the work of replacing the seal ring is very troublesome.

Method used

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  • Seal ring and sealing structure
  • Seal ring and sealing structure
  • Seal ring and sealing structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] Hereinafter, referring to the drawings, embodiments for implementing the present invention will be described in detail based on examples. However, the dimensions, materials, shapes, relative arrangements, and the like of the constituent elements described in the embodiments are not limited to the scope of the present invention unless otherwise specified.

[0051] (Example)

[0052] refer to Figure 1 to Figure 8 , the sealing ring and the sealing structure of the embodiment of the present invention will be described. It should be noted that, in transmissions such as AT and CVT for motor vehicles, the seal ring and the seal structure of this embodiment are used to seal the annular gap between the relatively rotating shaft and the housing in order to maintain oil pressure. In addition, in the following description, "high pressure side" refers to the side that becomes high pressure when a pressure difference is generated on both sides of the seal ring, and "low pressure ...

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PUM

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Abstract

Provided are a seal ring and sealing structure capable of keeping the seal ring from running into the leading end of a housing when a shaft is inserted into the housing by reducing the displacement of the central axis line of the seal ring with respect to the central axis line of the shaft. The seal ring is characterized in that: the seal ring is configured from a thin section (100A), the radial thickness of which is thin and which is provided in a range of less than 180 DEG in the circumferential direction, and a thick section (100B), the radial thickness of which is thicker than the thin section (100A) as a result of being configured to protrude further inward in the radial direction than the inner circumferential surface of the thin section (100A); an abutment section (110) is provided in the thin section (100A); and over the entire inner circumferential edges of the two side surfaces of the thick section (100B), respective recesses (120) for forming clearances from the corners of the two edges of the bottom of a circular groove provided in the housing are formed.

Description

technical field [0001] The invention relates to a sealing ring and a sealing structure for sealing the annular gap between the shaft and the shaft hole of the casing. Background technique [0002] For example, an automatic transmission (AT: Automatic Transmission) and a continuously variable transmission (CVT: Continuously Variable Transmission) for a motor vehicle have a seal ring installed in an annular groove provided on the outer peripheral surface side of the shaft, and the shaft and the housing The annular gap between them is sealed. In this technique, a shaft with a seal ring attached to an annular groove in advance is inserted into a shaft hole provided in the housing. [0003] Here, when the shaft is inserted through the shaft hole, the seal ring may be damaged. refer to Figure 9 , explaining why. Figure 9 It is an explanatory diagram of the work of inserting the shaft through the housing in the conventional art. As described above, in the shaft hole 310 provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/18B29C43/02B29C51/08
CPCF16J15/32F16J15/3208B29C43/02B29C51/08F16J9/20F16J15/441F16H57/029F16J15/3496
Inventor 关一成
Owner NOK CORP