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Water pump

A technology of water pump and pulley, applied in the field of water pump, can solve the problems of increased sliding resistance, reduced friction force, loss of rotational force transmission, etc., and achieves the effect of improving installation performance and reducing size

Inactive Publication Date: 2004-12-29
AISIN SEIKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Meanwhile, according to the water pump of this prior art, when the coolant leaked from the shaft seal (mechanical seal) invades the bearing, such disadvantages are exposed that the bearing is corroded, the sliding resistance is increased, or the bearing is damaged.
It is well known that the transmission of the rotational force of the pulley is carried out by the rotating shaft by means of the friction between the belt and the pulley, the belt constitutes the rotational force transmission means, so when the liquid adheres to the belt engaging surface of the pulley, it causes a decrease in the friction force , causing loss of rotational force transmission
Also, the belt is generally made of rubber, so there is a problem that the belt bulges due to the adhered liquid, and its strength is also lowered.

Method used

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Embodiment Construction

[0039] figure 1 is a sectional view of the water pump of the first embodiment of the present invention.

[0040] exist figure 1 Among them, the water pump 101 is composed of a pulley 110 , an impeller 130 , a bearing 140 , a shaft seal 150 , a casing (main body) 160 and a seal 180 .

[0041] The pulley 110 is formed in a cylindrical cup shape, and has a shaft portion 120 at the center of the bottom surface, which protrudes from the cylindrical shape in a direction away from the bottom surface. The shaft portion 120 and the outer peripheral surface of the pulley 110 are concentrically arranged. The pulley 110 is made by stamping a disc-shaped member such as a steel plate treated for corrosion resistance. That is, the pulley 110 having the pulley member and the shaft portion 120 is formed from a sheet metal member through a stamping and / or extrusion process. The shaft portion 120 is formed in a hollow cylindrical shape as shown.

[0042]The impeller 130 can be said to be an...

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Abstract

To provide a water pump capable of preventing coolant leaked from a shaft sealing member from invading a bearing by a simple constitution, in a water pump 101 in which an outer ring 140b of a bearing 140 is attached to an inner peripheral face 110a of a pulley 110, an inner ring 140a of the bearing 140 is attached to an outer peripheral face 163b of a cylindrical portion 163 of a housing 160 and a shaft sealing member 150 is attached to an inner peripheral face 163a of the cylindrical portion 163.

Description

technical field [0001] The invention relates to a water pump for circulating the coolant of an internal combustion engine. Background technique [0002] In Japanese Patent Early Publication No. 262096 / 1992, a water pump is disclosed. The pump casing of the water pump has a cylindrical support portion surrounding a rotating shaft, and the outer end of the rotating shaft protrudes outward from the supporting portion. , integrated with a cylindrical pulley surrounding the support portion. A bearing is disposed between the inner surface of the pulley and the outer surface of the support portion, and only one seal is disposed concentrically with the bearing, disposed between the inner surface of the support portion and the rotating shaft. [0003] As shown in FIG. 12, the water pump disclosed in Japanese Patent Laid-Open No. 262096 / 1992 has a support portion or main body 2A fixed to the connecting surface of a cylinder block of an internal combustion engine, a pulley portion 40A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/04F04D29/049F04D29/10
CPCF04D29/049F05B2260/603F04D29/106F05D2260/6022
Inventor 小泽保夫千叶淳中条雅树山本淳也
Owner AISIN SEIKI KK