JPS6145281Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an engine equipped with an oil pump for pumping lubricating oil.

As a prior art related to this type of engine, as shown in Japanese Utility Model Publication No. 54-25940, there is one in which lubricating oil stored in an oil pan is pumped up by an oil pump and can be pumped to various parts of the engine. However, when such an oil pump is provided on one end surface of the cylinder block, there is a problem in that the oil pan tends to become larger and the overall length of the engine tends to increase. In other words, in this type of oil pump, an oil inlet that communicates with the pump chamber through an oil distribution hole is opened at the bottom of the oil pump body, and the oil lifting pipe of the strainer is connected to this oil inlet. Generally, the oil inlet is provided approximately directly below the pump chamber for convenience in machining when drilling the oil flow hole. Therefore, with such a configuration,
Since the joint portion of the oil pan must be provided further outside the oil inlet, there is a high possibility that the overall length of the oil pan and the engine will become unduly large. In particular, when the oil pump is moved to the side, that is, in a direction perpendicular to the axis of the crankshaft, in order to mount a balance shaft, auxiliary drive shaft, etc. on the engine, the oil introduction In order to prevent interference between the oil frying pipe of the strainer connected to the mouth and the corners of the arc-shaped oil pan, there is a problem in that the oil pan must be made larger than necessary. be.

The present invention was developed by focusing on these circumstances, and the oil inlet is located inward from the pump chamber and opened, and the oil inlet and the pump chamber are connected by a plurality of straight holes. The lower end opening of the outermost straight hole, which is one of the straight holes, is configured so that it can be closed by the flange of the oil pan instead of being closed with a blind plug. To provide an engine with an oil pump that can easily and reliably eliminate inconveniences.

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

Front end surface 2a of cylinder block 2 of engine 1
An oil pump 3 is provided near one side of the engine, so that the oil pump 3 can pump up the lubricating oil A stored in the oil pan 4 and forcefully send it to each part of the engine. The oil pump 3 has a pump chamber 6 formed within a body 5 that is attached to the front end surface 2a of the cylinder block 2, and an external gear 8 that is rotatably driven by a crankshaft 7 within the pump chamber 6.
This is an internal gear type which accommodates a ring-shaped internal gear 9 surrounding the external gear 8.
Then, an oil inlet 11 is opened on the bottom surface 5a of the body 5 so as to be located inward than directly below the pump chamber 6, and the oil inlet 11 and the pump chamber 6 are connected to each other by a plurality of straight holes. That is, the bottom surface 5a of the body 5 extends substantially directly downward from the pump chamber 6.
The outermost straight hole 12 opens to the outermost straight hole 1.
The back surface 5 of the body 5 extends inward from the middle of the body 5.
an intermediate straight hole 13 opening at b, and an oil inlet 1 extending downward from the middle of this intermediate straight hole 13;
They are communicated with each other via an innermost straight hole 14 extending to 1. Then, the lower end opening 12a of the outermost linear hole 12 is connected to the flange portion 15 of the oil pan 4.
At the same time, the oil inlet port 11
A frying oil pipe 16a of the strainer 16 is connected to the strainer 16. Further, the inner end opening 13a of the intermediate straight hole 13 is connected to the front end surface 2a of the cylinder block 2.
It is blocked by. Note that the flange portion 15
The linear hole closing portion 15a is formed wider than other portions to strengthen sealing performance, and sealing balls 17 and 18 are provided at the openings of the linear holes 12 and 14, respectively. It is press-fitted.

With such a configuration, by operating the oil pump 3, the lubricating oil A in the oil pan 4 is pumped through the strainer 16 to the oil inlet 11, and from this oil inlet 11 to each straight line. The oil is introduced into the pump chamber 6 through the holes 14, 13, and 12 in sequence, but in the present invention, the oil inlet 11 is positioned inward from the oil chamber 6 and opened. ing. Therefore, the strainer 1 connected to the oil inlet 11
4 and the oil pan 4 are less likely to interfere with each other, the inconvenience of having to increase the size of the oil pan 4 in relation to the strainer 14 can be eliminated. Further, the oil inlet 11 and the pump chamber 6 are connected to a plurality of straight holes 1.
2, 13, and 14, and instead of blocking the lower end opening of the outermost straight hole 12, which is one of the straight holes, with a blind plug, the flange portion 1 of the oil pan 4
5, the oil inlet port 11 and the pump chamber 6 can be easily processed to communicate with each other, and the effort of installing a blind plug can be omitted. There is no inconvenience such as the oil pan becoming even larger due to the provision of a plug.

Therefore, with such a device, even if the oil pump 3 is moved to the side from its normal position as in this embodiment in order to provide a balance shaft or the like, The effect is that the lubricating oil suction path can be configured without unduly increasing the size of the oil pan 4.

In the embodiment described above, a ball for sealing the lower end opening of the outermost linear hole is press-fitted, but this ball may be omitted.

[Brief explanation of the drawing]

FIG. 1 is a partial side sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line -- in FIG. 1...Engine, 2...Cylinder block, 3
... Oil pump, 4 ... Oil pan, 5 ... Body, 6 ... Pump chamber, 11 ... Oil inlet,
12... Outermost straight hole, 13... Middle straight hole, 14
... Innermost straight hole, 15 ... Flange portion of oil pan, 16 ... Strainer, 16a ... Oil frying pipe.

Claims (1)

[Scope of utility model registration request] An oil pump is provided on the end face of the cylinder block, and an oil inlet is opened at the bottom of the body of the oil pump, located inward from directly below the pump chamber formed in the body. and the pump chamber are communicated through a plurality of straight holes including an outermost straight hole extending substantially directly downward from the pump chamber and opening at the bottom surface of the body, and a lower end opening of the outermost straight hole is connected to the pump chamber. An engine with an oil pump, characterized in that the oil pan is closed by a flange portion, and an oil pumping pipe of a strainer is connected to the oil inlet.