JPH0322526Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump device connected to and driven by the crankshaft of an internal combustion engine.

FIG. 1 shows, in cross section, a connecting portion between a pump driven by an internal combustion engine and the internal combustion engine. Reference numeral 1 denotes a pump case, which is assembled integrally with the pump side cover 3 via an O-ring 2 with bolts, etc., and at this time, the swirl chamber 4 is
The pump case 1 and the pump side lid 3 are in direct contact with each other via the ring 5. Further, a discharge flange 7 is attached via a packing 6. The pump side cover 3 is assembled to the crankcase side cover 9 of the internal combustion engine with bolts 8 and the like, and has a cylindrical protrusion 3a that is in a socket-fitting relationship with the crankcase side cover 9. Water and the like leaking from the notches 3b and 3c are discharged to the outside of the system. Reference numeral 10 denotes a crankshaft, which is supported by the crankcase side lid 9 via a bearing 11 and is also supported by the cylindrical protrusion 3a via a mechanical seal 12 in a liquid-tight manner. Further, an impeller 13 is screwed into the tip. The crankcase side cover 9 is fixed to the crankcase 15 with bolts 14 and the like.

When the internal combustion engine is operated, liquid such as water flows out to the discharge flange 7 through the pump case 1 and the volute chamber 4 as shown by the arrow.

However, the above method has the following drawbacks.

When connecting a pump to an internal combustion engine, the pump side cover 3 is assembled to the crankcase side cover 9 using bolts 8, etc., and then the pump case 1 is assembled together with the mechanical seal 12, impeller 13, volute chamber 4, etc. , the number of parts and therefore the number of assembly man-hours,
There is a problem that the number of processing steps increases.

The purpose of the present invention is to provide a pump device driven by an internal combustion engine that eliminates the above-mentioned drawbacks, and its characteristics are as follows: , a coupling case which is integrally formed with a pump-side lid part that covers a pump chamber in which the pump is housed, an intermediate part in which a shaft sealing member is housed, and a crankcase-side lid part that supports a crank bearing. This is because it is installed at the connection between the engine and the internal combustion engine.

The present invention can be applied to a power pump.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a cross-sectional view showing a connecting portion between a pump and an internal combustion engine according to an embodiment of the present invention.

In the figure, each member numbered 1, 2, 4, 5, 6, 7 and 10 to 15 is the same as in FIG. 1.

21 is a connection case, and the crankcase side cover part 2
1c and the pump side lid part 2 facing the same side lid part 21c.
1a and an intermediate portion 21b between both 21c and 21a are integrally formed by die casting or the like.

That is, the connection case includes a pump side lid part 21a that covers the side of the pump chamber in which the impeller 13 of the pump is housed, an intermediate part 21b that houses the mechanical seal 12, and a crankcase side lid part that supports the crank bearing 11. 21c is integrally formed by die-casting or the like.

The pump side cover part 21a is connected to the pump case 1 and the crankcase side cover part 21c by bolts (not shown) or the like.
are respectively assembled to the crankcase 15 by bolts 14. 21d indicates a drainage hole.

The functions and effects of the above configuration will be described.

When connecting the pump and the internal combustion engine, attach the crankcase side cover 21c of the connection case 21 to the bolt 14.
Because of the structure in which the pump case 1 is fixed together with the mechanical seal 12, impeller 13, volute chamber 4, etc., that is, the pump side cover and crankcase side cover are integrated, the number of parts is reduced. Assembly and processing man-hours can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a connection between a conventional pump driven by an internal combustion engine and the internal combustion engine, and FIG. 2 is a sectional view showing a connection between a pump and the internal combustion engine according to an embodiment of the present invention. 21...Connection case, 21a...Pump side lid part, 21b...Intermediate part, 21c...Crankcase side lid part.

Claims (1)

[Scope of utility model registration request] In an engine equipped with a pump that is directly connected to and driven by the crankshaft of an internal combustion engine, a pump-side lid part that covers a pump chamber in which the pump is housed, an intermediate part in which a shaft sealing member is housed, and a crank bearing. 1. A pump device driven by an internal combustion engine, characterized in that a connecting case integrally formed with a supporting crankcase side lid is provided at a connecting portion between the pump and the internal combustion engine.