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Sealing structure of automatic transmission

A technology of automatic transmission and sealing structure, applied in the direction of engine sealing, engine components, transmission parts, etc., can solve problems such as reducing the sealing performance of labyrinth seals

Active Publication Date: 2016-10-26
JATCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In this way, foreign matter entering the gap W, such as solid matter such as sand contained in muddy water, may be sandwiched between the front end 28a of the side lip 28 and the wall portion 112 of the dust cover 110, reducing the sealing performance of the labyrinth seal.

Method used

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  • Sealing structure of automatic transmission
  • Sealing structure of automatic transmission
  • Sealing structure of automatic transmission

Examples

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Embodiment Construction

[0075] Next, embodiments of the present invention will be described.

[0076] figure 1 (a), (b) is a figure explaining the sealing structure of embodiment, figure 1 (a) is an enlarged cross-sectional view showing the periphery of the lip seal assembly 20 fitted and supported by the support hole 108 of the transmission case 107, figure 1 (b) is an enlarged representation figure 1 Cross-sectional view of area A in (a).

[0077] like figure 1 As shown in (a), a transmission case 107 of an automatic transmission for a vehicle is provided with a support hole 108 for a drive shaft 109 , and an annular lip seal assembly 20 is fitted in the support hole 108 .

[0078] The lip seal assembly 20 press-contacts the abutting portion 26 provided on the inner diameter side to the outer periphery 109a of the drive shaft 109 inserted through the support hole 108, and the gap between the drive shaft 109 and the support hole 108 is sealed by the lip seal assembly 20. .

[0079] like f...

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PUM

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Abstract

A sealing structure of an automatic transmission to prevent the sealing performance from decreasing. In the gearbox (107), the lip seal assembly (20) supported by the support hole (108) of the drive shaft (109) press-fits the abutment portion (26) provided on the inner diameter side of the drive shaft (109). outer circumference (109a), and has a side lip (28) extending from the radially outer side of the abutment portion (26) toward the axial direction of the drive shaft (109), and the side lip (28) protrudes to the outer side of the support hole (108). The front end (28a) side of 28) is inserted between the inner diameter side wall portion (113) and the outer diameter side wall portion (112) of the dust cover (110) rotatably mounted on the drive shaft (109). It is pressed against the wall portion (112), wherein the lip seal assembly (20) is provided with a labyrinth lip (29) extending from the radially outer side of the side lip (28) in the same direction as the side lip (28), The outer diameter side wall portion (112) is positioned between the side lip (28) and the labyrinth lip (29).

Description

technical field [0001] The present invention relates to a sealing structure of an automatic transmission. Background technique [0002] In Patent Document 1, a general structure around a differential device of an automatic transmission is disclosed. [0003] Patent Document 1: (Japanese) Unexamined Patent Application Publication No. 2013-72524 [0004] Figure 4 (a) to (c) are diagrams illustrating a general configuration around a differential device 100 of an automatic transmission, in which Figure 4 (a) is a sectional view around the differential device 100, Figure 4 (b) and Figure 4 (c) is a figure explaining the lip seal assembly 20A provided between the support hole 108 of the transmission case 107, and the drive shaft 109. FIG. [0005] The differential device 100 includes a pinion 101 to which a rotational drive force of the engine is input via a transmission, and left and right side gears 102 meshing with the pinion 101, and the pinion 101 and the side gears 102 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/029F16J15/3232F16J15/447
CPCF16H57/029F16J15/3208F16H57/0472F16H2057/02047
Inventor 松原谦二福岛治男赤池弘次原田正树千叶康雄渡部英彦
Owner JATCO LTD