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Hermetically sealed structure using torsional vibration dampers and oil seals

A sealing structure and shock absorber technology, which is applied in the direction of spring/shock absorber, engine seal, spring/shock absorber design features, etc., can solve the problems of oil seal 110 sealing performance reduction, oil leakage, etc.

Active Publication Date: 2018-08-24
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the structure of the above-mentioned conventional damping pulley 100 and the oil seal 110, foreign matter sometimes enters between the oil seal 110 and the protrusion 101a, and the sealing lip 111 is bitten by the foreign matter and is damaged or deteriorated, so that the sealing performance of the oil seal 110 is reduced, resulting in oil leakage.

Method used

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  • Hermetically sealed structure using torsional vibration dampers and oil seals
  • Hermetically sealed structure using torsional vibration dampers and oil seals
  • Hermetically sealed structure using torsional vibration dampers and oil seals

Examples

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Embodiment Construction

[0050] Embodiments of the present invention will be described below with reference to the drawings.

[0051] figure 1 It is a partial cross-sectional view along the axial line for showing a schematic structure of a sealing structure using a torsional vibration damper and an oil seal according to the first embodiment of the present invention. The sealing structure using a torsional vibration damper and an oil seal according to the first embodiment of the present invention is applied to an engine of an automobile. In the following, for the convenience of explanation, the arrow a (refer to figure 1 ) direction is set to the outside, and the arrow b (refer to figure 1 ) direction is set to the inside. More specifically, the outer side is a direction away from the engine, and the inner side is a direction closer to the engine, which is the engine side. In addition, in the direction perpendicular to the axis x (hereinafter also referred to as "radial direction"), the directio...

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PUM

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Abstract

The present invention provides a sealing structure using a torsional vibration damper and an oil seal capable of suppressing the sealing lip of the oil seal from being exposed to foreign matter entering from the torsional vibration damper. A sealing structure (1) using a torsional vibration damper and an oil seal has a damping pulley (10) and an oil seal (20) as a torsional vibration damper. The shock-absorbing pulley (10) has an annular hub groove (30) that is recessed in the outer direction and extends in the circumferential direction along the protrusion (14) of the hub (11). The oil seal (20) has a side lip (29) extending outward. The outer peripheral surface (31) of the hub groove (30) expands in diameter as it faces outward, and the side lip (29) of the oil seal (20) does not enter the interior of the hub groove (30). An annular gap (g1) is formed between the end (29a) and the inner end (31a) of the outer peripheral surface (31) of the hub groove (30).

Description

technical field [0001] The present invention relates to a sealing structure using a torsional vibration damper and an oil seal, and more particularly, to a torsional vibration damper for absorbing torsional vibration generated in a rotating shaft of an engine of a vehicle or the like and an oil seal used for the torsional vibration damper Formed sealed structure. Background technique [0002] For example, in an engine of a vehicle, a torsional damper is attached to one end of the crankshaft in order to reduce torsional vibration due to rotational fluctuation of the crankshaft. Generally, in a vehicle engine, the torsional vibration damper is used as a damper pulley, and transmits a part of the power of the engine to auxiliary machines such as a water pump and an air conditioner compressor via a power transmission belt. In addition, an oil seal is used to seal the space between the torsional vibration damper and a through hole, for example, a front cover that is inserted int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/44F16F15/10F16J15/3204
CPCF16J15/3204F16J15/44F16F15/126F16J15/447F16F2230/30F16C33/805F16J15/10F16F15/10F16J15/32F16F15/1245F16F2230/0052F16H55/36F16H2055/366F16J15/3208
Inventor 纸谷佑辅松井宏树尾本真哉中岛彻水田裕贤
Owner NOK CORP