JPH0356900U

JPH0356900U -

Info

Publication number: JPH0356900U
Application number: JP11857489U
Authority: JP
Priority date: 1989-10-09
Filing date: 1989-10-09
Publication date: 1991-05-31

Description

[Brief explanation of drawings]

第１〜３図は本考案の一実施例としてのウオー
ターポンプの水抜き構造を示すもので、第１図は
その要部構造を示す正面図、第２図はその要部構
造を示す縦断面図（第１図の−矢視断面図）
、第３図はその変形例を第２図に対応させて示す
縦断面図であり、第４〜６図は従来のウオーター
ポンプの水抜き構造を示すもので、第４図はその
一例を模式的に示す正面図、第５図はその他の例
を模式的に示す正面図、第６図は第５図の−
矢視断面図である。１……ボス部、６……駆動軸、７……吸込側水
室、８……メカニカルシール、９……水抜き孔、
９ａ……水抜き孔の内周面側部分、９ｂ……水抜
き孔の外面側部分、１０……蒸気逃げ孔、１０ｂ
……蒸気逃げ孔の外面側部分、１１……タイミン
グベルトカバー、１２……タイミングベルト、１
３……シール部、１５……突起部、１６……盲栓
、１７……ウオーターポンププーリ、１８……ベ
アリング、１９……突起部、Ｐ……ウオーターポ
ンプ。 Figures 1 to 3 show the water draining structure of a water pump as an embodiment of the present invention. Figure 1 is a front view showing the main structure, and Figure 2 is a vertical cross section showing the main structure. Diagram (cross-sectional view along the - arrow in Figure 1)
, FIG. 3 is a vertical sectional view showing a modified example corresponding to FIG. 2, and FIGS. 4 to 6 show the water draining structure of a conventional water pump, and FIG. 4 is a schematic diagram of one example. 5 is a front view schematically showing another example, and FIG. 6 is a front view schematically showing another example.
It is an arrow sectional view. 1... Boss part, 6... Drive shaft, 7... Suction side water chamber, 8... Mechanical seal, 9... Water drain hole,
9a... Inner peripheral side part of the water drain hole, 9b... Outer side part of the water drain hole, 10... Steam escape hole, 10b
...Outer side portion of steam escape hole, 11...Timing belt cover, 12...Timing belt, 1
3...Seal portion, 15...Protrusion, 16...Blind plug, 17...Water pump pulley, 18...Bearing, 19...Protrusion, P...Water pump.

Claims

[Scope of utility model registration request]

In the water pump, a boss part that covers the drive shaft and the suction side water chamber and is fitted with a sealing device;
In order to drain water leakage from the seal device, a drain hole is formed on the outside of the seal device at the lower part of the boss portion from the inner circumferential surface to the outer surface, and a drain hole is formed on the outside of the seal device at the upper portion of the boss portion. and a steam escape hole formed from the inner circumferential surface to the outer surface, and the inner circumferential surface side portions of the water drain hole and the steam escape hole are coaxial with each other extending in the radial direction of the boss portion. A water drain structure for a water pump, characterized in that the outer surface side portion of the water drain hole is formed to extend in the axial direction of the boss portion.