JPS6215465Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a water pump installed in an engine.

The water pump, which is conventionally installed in engines for cooling water circulation, has a body supported on a rotating shaft via a bearing, and an impeller that is integrally attached to the rear of the rotating shaft inside the body and can rotate freely. It is arranged. Further, a pulley attachment member is integrally attached to the tip of the rotating shaft, and a drive pulley is attached to the flange portion of the pulley attachment member with an appropriate fastener, such as a bolt.

The drive pulley is driven by the crankshaft of the engine via a drive belt that is hung in its groove, and rotates the impeller via the rotating shaft.

In vehicles equipped with such conventional water pump-equipped engines, when driving in the rain or washing the water pump, water that is applied to the water pump body moves forward along the outer surface of the body and flows through the opening at the tip. This had the problem of penetrating into the bearing and shortening the life of the bearing.

The present invention was devised to solve these problems, and it uses a water intrusion prevention plate that has an elastic lip that contacts the tapered middle part of the drive pulley to prevent water from entering the bearing of the water pump. This effect and the centrifugal action of the tapered intermediate part are used to completely shut off the water droplets and quickly discharge the water droplets to the outside, thereby extending the life of the bearing and thereby improving its durability and reliability. The purpose is to provide a water pump, and its gist is that the outer circumference of a body supported via a bearing on a rotating shaft having a drive pulley has elasticity that is in contact with the inner circumference of a tapered middle part of the drive pulley. A water pump for an engine is provided with a water intrusion prevention plate having a lip, and one embodiment thereof will be described below with reference to the drawings.

The figure shows a cutaway surface of a water pump according to an embodiment of the present invention which is installed in an engine for cooling water circulation.A body 4 is supported on a rotating shaft 1 via bearings 2 and 3, An impeller 5, which is integrally attached to the rear part of the rotating shaft 1, is rotatably disposed inside the rotary shaft 4.

Further, a pulley mounting member 6 is provided at the tip of the rotating shaft 1 that protrudes outward from the tip opening 41 of the body 4.
are attached integrally, and the flange portion 61
A drive pulley 8 is attached to the drive pulley 8 by suitable fasteners such as bolts 7.

The driving pulley 8 has an intermediate portion 82 tapered toward the rear from the portion attached to the flange portion 61, and a groove portion 81 is formed at the rear end portion. A drive belt (not shown) is hung over this groove 81, and the drive belt transmits the driving force from the engine crankshaft to the drive pulley 8.
The impeller 5 is rotated via the rotating shaft 1.

On the other hand, a cylindrical portion 91 is provided on the outer circumferential surface of the body 4, particularly on the outer circumferential portion of the tip, and is fitted integrally with the outer circumferential portion.
and a disk portion 92 extending in the radial direction and having an elastic lip 93 in contact with the inner circumferential surface 83 of the drive pulley 8 at least at the tip thereof.

The prevention plate 9 may be made of an elastic material such as rubber at least in the portion of the elastic lip 93, and other portions may be made of an elastic material such as rubber.
It may also be constructed of plastic, metal plate, or the like.

Since the water pump in the above embodiment of the present invention is constructed as described above, water applied to the body 4 moves forward when driving in the rain or when washing the car, and flows from the tip opening 41 to the bearings 2 and 3 side. Even if water tries to enter, the elastic lip 93 of the prevention plate 9 is in contact with the inner circumferential surface 83 of the tapered intermediate portion 82 of the drive pulley 8 as described above, so that the entry of water is completely blocked and the water droplets are elastically The liquid is guided by the lip 93 and drips onto the inner circumferential surface 83 of the tapered intermediate portion 82 .

The water dripped onto the inner circumferential surface 83 is quickly discharged outward by the centrifugal force of the tapered intermediate portion 82 of the driving pulley 8 that rotates when the engine rotates.

At this time, the elastic lip 93 is in contact with the inner circumferential surface 83 of the rotating tapered intermediate portion 82, but as described above, since the elastic lip 93 is only in contact with the inner circumferential surface 83, there is no hindrance to the rotation of the drive pulley 8 at all.

As described above, the engine water pump according to the present invention has an elastic lip in contact with the inner circumferential surface of the tapered intermediate portion of the drive pulley on the outer circumference of the body supported via a bearing on a rotating shaft having a drive pulley. Since the water intrusion prevention plate is provided, the blocking effect and guiding effect of the elastic lip and the centrifugal action of the tapered intermediate part combine to operate the water pump without any hindrance to the rotation of the drive pulley. To provide a water pump that completely blocks water from entering a bearing and quickly drains water droplets to the outside, thereby extending the life of the bearing and thereby improving durability and reliability. can.

In addition, since the elastic lip simply contacts the inner circumferential surface of the tapered intermediate portion of the drive pulley, even when the drive pulley rotates, it does not interfere with the rotation of the drive pulley at all, and does not cause excessive temperature rise. This prevents the metal from rising or causing abnormal wear.

Note that although the above embodiment has been described for a vehicle engine, the water pump of the present invention is not limited to this embodiment, and it goes without saying that it can be widely applied to water-cooled engines.

[Brief explanation of the drawing]

The figure is a partially cutaway sectional view showing one embodiment of the present invention. 1; Rotating shaft, 2, 3; Bearing, 4; Body, 8;
Drive pulley, 9; Water intrusion prevention plate, 92; Disk portion, 93; Elastic lip, 82; Tapered intermediate portion,
83; Inner peripheral surface.

Claims (1)

[Scope of utility model registration request] A water pump for an engine, comprising: a water intrusion prevention plate having an elastic lip in contact with an inner circumferential surface of a tapered intermediate portion of the drive pulley, provided on the outer circumference of a body supported via a bearing on a rotating shaft having a drive pulley.