JPH0422029Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an engine-attached water pump device driven by a V-belt of the engine.

(Prior Art) In the conventional engine-equipped water pump device, as shown in FIG.
It is attached to an engine case 10 including a gear case, crankcase, and cover with bolts 4 through a ring 9, and a water pump is driven by a V-belt 6 of the engine via a pulley 7 and a rotating shaft 8.

(Problems to be Solved by the Invention) The conventional engine-attached water pump device is attached to the engine case 10 by the water outlet flange 3 and the attachment part 5 provided above and below the spiral part 2 of the water pump 1. Since both the mounting surfaces of the water outlet flange and the mounting part are on the same plane at the upper and lower parts of the spiral part, the structure is such that the bending load from the V-belt 6 is cantilevered. It is necessary to increase the wall thickness of the pump case 1a between the spiral part and the V-belt in addition to the part 2, and to provide reinforcing ribs, which causes an increase in weight.

When the water pump deforms under the bending load,
As shown in FIG. 4, there is a possibility that the rotating shaft 8 inside the pump is eccentric α and the blades come into contact with the pump case, and therefore, if a large clearance is designed, the pump efficiency will be reduced.

When a gasket 9 is inserted into the water outlet flange 3 for sealing, it is necessary to cut the flange surface by the thickness of the gasket, and the gasket 9 is crushed and deformed 9a as shown in FIG.
Alternatively, if the accuracy in the thickness direction is poor, the pump body may tilt and the sealing performance of the flange surface portion may not be maintained, causing problems such as water leakage.

During the assembly process, it is necessary to use shims to adjust the inclination of the pump body due to gasket collapse or poor accuracy in the thickness direction, and there are also problems such as the difficulty of incorporating lubricating oil passages in the mounting area.

(Means for solving problems) The present invention solves the above-mentioned problems by supporting a spiral part forming a part of an engine-attached pump case and a rotating shaft of a pulley that suspends a V-belt of the engine. A water pump having a bearing section forming the main body of the pump case is attached to the engine case via a water outlet flange provided at the upper part of the spiral section, and a water pump having a bearing section forming the main body part of the pump case is attached to the engine case through the water outlet flange provided at the upper part of the swirling section. By attaching to the mounting stay on the engine case side via a mounting portion having a mounting surface perpendicular to the mounting surface, the pump case increases the supporting force against the bending load from the V-belt of the engine.
The above-mentioned problems are solved by preventing deformation and improving the sealing performance of the water outlet flange.

(Function) The water pump is attached to the engine case by the two mutually orthogonal mounting surfaces of the water discharge port flange and the mounting part provided on the pump case near the rotating shaft bearing of the water pump, so external loads In addition to improving the support of the water pump against the engine case, the parallelism of the water outlet flange to the engine case is maintained and a good seal is created between the two, making it possible to easily install the water pump. The water pump operates smoothly by supporting the pump case near the load side against the bending load.

(Embodiment) Figures 1A and 1B show a first embodiment of the present invention, in which 10 is an engine case including a gear case, a crank case, a cover, etc. in the engine, and 11 is a water tank attached to the engine case 10. The water pump 11 is a pump, and the water pump 11 is driven via a pulley 17 and a rotating shaft 18 by a spiral part 12 forming a part of the pump case and a V-belt 16 of an engine (not shown). The rotary shaft 18 is provided with bearings 18a, 18 within the bearing portion 11a.
It is rotatably supported by a.

Furthermore, the water outlet flange 13 provided on the upper part of the spiral part 12 of the water pump 11 is attached to the engine case 10 with bolts 14, 14, and the A mounting portion 20 is provided on the bearing portion 11a, and the mounting portion 20 has a mounting surface 20a orthogonal to the flange surface 13a of the water outlet flange 13. The structure is such that it is attached with bolts 14, 14 in contact with the case (projecting from the case).

Furthermore, a lubricating oil supply pipe 30 is connected to the upper part of the bearing part 11a in which the bearings 18a, 18a are built in, through a supply port 31, and the mounting part 2
0 and the bearing 18 in the mounting stay 21.
A lubricating oil passage 32 for draining oil is provided and connected to the engine case 10, which communicates with the engine case 10.

The lubricating oil passage 32 is for draining oil,
Conversely, it can also be designed for lubricating oil supply.

(Other Embodiments) FIGS. 2A and 2B show a second embodiment of the present invention, and compared to the first embodiment, the mounting portion 20
A mounting portion 30 corresponding to the above is provided, and the mounting surface 30a of the mounting portion 30 is orthogonal to the mounting surface 20a, and the flange surface 1 of the water outlet flange 13 is provided.
The mounting stay 31 is characterized by being orthogonal to the engine case 10, and therefore, the mounting stay 31 protrudes from the engine case 10 and has a shape as shown in the drawing.
Note that, if necessary, a lubricating oil passage (not shown) may be provided in the mounting stay 31 and the mounting portion 30, which communicates with the bearing portion in the bearing portion 11a.

The second embodiment shows an example of how a fresh water pump is attached to a diesel engine, and with the above-described mounting structure, the pump case can be made of a non-magnetic aluminum alloy to reduce its weight.

In the first embodiment and the second embodiment, although the water outlet flange 13 is shown as being attached directly to the engine case 10 in FIGS. 1 and 2, a gasket or an O-ring may be attached as necessary. Can be used as an interposed seal mechanism. If the pump case is made of aluminum alloy, the sealing performance will be improved and it will not be necessary.

The embodiment of the present invention has the above-described configuration, and the flange surface 13a of the water outlet flange 13 is
(mounting surface) and the mounting surface 20a of the mounting portions 20, 30,
30a are orthogonal to each other, the parallelism of the flange surface 13a and the mounting surfaces 20a, 30a to the engine case 10 and the mounting stays 21, 31 is maintained, making the water pump installation and tightening work easy and quick. In addition, the supporting force of the water pump due to external loads is increased, the parallelism between the water outlet flange 13 and the engine case 10 is maintained, and the sealing performance between the two is improved, making it easier to seal the area. can be omitted if necessary.

Furthermore, the mounting parts 20 and 30 are designed to directly support the bending load received from the V-belt 16 of the engine with the bearing part 11a nearby, thereby reducing deformation of the bearing part and thereby reducing the rotating shaft. It has the effect of preventing the eccentricity of the pump case and preventing the impeller from contacting the pump case.It also eliminates the need to increase the thickness of the pump case or add reinforcing ribs, resulting in a lighter weight.
The number of attachment parts is reduced, and the gap between the vane and the pump case is reduced, increasing pump efficiency.

Furthermore, there is a mounting part 2 near the bearing part of the water pump.
0, 30 and the mounting stays 21, 31, it is possible to provide a lubricating oil passage 32 within the section, improving lubricating oil supply and oil drainage performance, and simplifying the mechanism. .

(Effects of the invention) The present invention has the above-mentioned configuration, in which the water discharge port flange of the water pump and the mounting part provided on the pump case near the rotating shaft bearing of the water pump are connected at right angles to each other. Since it is attached to the engine case through the mounting surface (flange surface), the water pump's support against external loads is increased, and
The parallelism of the water outlet flange to the engine case is maintained, improving the sealing performance between the two, allowing for easy and quick installation of the water pump, and the pump case resisting bending loads from the V-belt due to the mounting portion. The operational performance of the water pump has been significantly improved by preventing deformation of the pump, eccentricity of the rotating shaft, and contact of the impeller with the pump case.

[Brief explanation of drawings]

FIG. 1A is a side view showing the first embodiment of the present invention;
Fig. 1B is a - perspective view of Fig. 1A, Fig. 2A is a side view showing the second embodiment, Fig. 2B is a - perspective view of Fig. 2A, and Figs. 3A and B are conventional Example side view and −
4 is a vertical sectional view of FIG. 3A, and FIG. 5 is a diagram of the gasket in a deformed state corresponding to FIG. 3B. 10...Engine case, 11...Water pump,
13... Water outlet flange, 13a... Flange surface, 20, 30... Mounting part, 20a, 30a...
Mounting surface, 21, 31...Mounting stay.

Claims (1)

[Scope of utility model registration request] A water pump having a spiral part forming a part of the pump case and a bearing part forming the main body of the pump case supporting the rotating shaft of the pulley that tensions the V-belt of the engine is provided above the spiral part. It is attached to the engine case via a water outlet flange, and is attached to the mounting stay on the engine case side via an attachment part having a mounting surface perpendicular to the attachment surface of the water outlet flange provided on the bearing part. An engine-attached water pump device characterized by: