JP2544520Y2 - Engine oil pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pump for supplying cooling oil and lubricating oil for an engine.

[0002]

2. Description of the Related Art In order to secure a space around a cylinder block of an engine, an oil pump for supplying cooling oil and lubricating oil for an engine is built in a rear end of the cylinder block. As shown in FIG. 4, the oil pump has an opening at one end, and a pair of gears 2 and 3 meshing in a housing 1 in which this opening is closed by a cover (not shown) is rotatable. An inlet-side passage 5 that is pivotally supported and communicates with the housing 1 on the suction side;
The pump unit is provided in the space at the rear end of the cylinder block, and the inlet side passage 5 is communicated with the inside of the oil pan via a strainer. The outlet side passage 7 is connected to an oil gallery provided in the cylinder block.

[0003]

As described above, since the passage 1 on the inlet side communicating with the suction side of the pump and the passage 7 on the outlet side communicating with the discharge side 6 are formed in the housing 1, the inlet 5 The passage 5 on the side and the passage 7 on the outlet side are restricted to a fixed position. Therefore, it is difficult to reduce the size of the oil pump, especially when it is necessary to intersect the passage 5 on the inlet side and the passage 7 on the outlet side communicating with the discharge side 6 in consideration of the arrangement position of the oil pump and the oil gallery position. , It was impossible to form this intersection.

An object of the present invention is to provide an engine oil pump that solves the above-mentioned conventional problems.

[0005]

In order to achieve the above object, a feature of the present invention is to provide a pair of housings each having an opening at one side end and meshing in a housing whose opening is closed by a cover. Gear is rotatably supported, and an oil pump in which the housing is built in the rear end of the cylinder block, a passage communicating with the discharge side or the suction side of the oil pump is formed in the housing, and the oil pump is formed in the cover. the suction side or discharge side in communication with passages, the housing-shaped
It is formed so as to intersect with the formed passage .

[0006]

With the above arrangement, the inlet side passage or the outlet side passage is divided into the housing side and the cover side, respectively , and
By forming intersecting a passage mouth side of the passage and the outlet side, the form of an oil pump Ru made compact without inlet side of the passage and the outlet side of the passage is restricted.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 10 denotes a cylinder block, and reference numeral 11 denotes an oil pump built in a space at the rear end of the cylinder block 10. As shown in FIG. 3, the oil pump 11 has a pair of gears 2 and 3 which mesh with each other in a housing 21 having an opening at one side as shown in FIG. The suction chamber 13 is formed on one side of the pair of gears 2 and 3 meshing with each other, and the discharge chamber 16 is formed on the other side. The opening is closed by a cover 12. The pair of gears 2,
An oil pump gear 19 meshes with a main gear (not shown) fixed to the crankshaft, and a drive gear 20 meshes with the oil pump gear 19.

In the present invention, a passage 17 communicating with the discharge chamber 16 is formed in the housing 21, and a passage 14 communicating with the suction chamber 13 is formed in the cover 12 with the discharge chamber 16.
It is formed so as to intersect with the passage 17 communicating with the passage . 1
An outlet 8 of a passage 17 communicating with the discharge chamber 16 is connected to an oil gallery of the cylinder block 10. Reference numeral 15 denotes an inlet of a passage 14 communicating with the suction chamber 13, and is connected to an oil pan via a strainer.

In the above embodiment, a passage 17 communicating with the discharge chamber 16 is formed on the housing 21 side, and a passage 14 communicating with the suction chamber 13 is formed on the cover 12 side with the discharge chamber 16.
Although the passage 17 is formed so as to intersect with the passage 17, the passage 14 communicating with the suction chamber 13 may be formed on the housing 21 side, and the passage 17 communicating with the discharge chamber 16 may be formed on the cover 12 side.

Since the present invention has the structure as described above, the rotation of the pair of gears 2 and 3 meshing in the housing 21 causes the oil in the oil pan to pass through the passage 14 and to flow into the suction chamber 1.
3 and is discharged to the discharge chamber 16 by the gears 2 and 3, and is fed to the oil gallery of the cylinder block 10 through the passage 17.

Therefore, in the present invention, the passage 14 on the suction side and the passage 17 on the discharge side are divided into a cover 12 and a housing 21, respectively, so that the passages communicating with the discharge chamber 16 are separated.
Since it is formed so as to intersect with the path 17 , the housing 21
, Only one passage is formed, and the form of the housing 21 is downsized. As a result, the entire oil pump becomes compact, the cylinder block 10 can be built in a small space, and the cylinder block 10 can be made compact.

Further, in the case of forming two passages, that is, a passage on the suction side and a passage on the discharge side in the housing as in the prior art, the positions of the inlet and the outlet are restricted, but in the present invention , an example is shown in FIG.
The passages 14 and 17 are formed so as to cross each other.
This restriction is eliminated.

[0013]

As described above, according to the present invention , a passage communicating with the discharge side or the suction side of the oil pump is formed in the housing, and the cover closing the opening of the housing is communicated with the suction side or the discharge side of the oil pump. a passage, the Haujin
Because it is a configuration formed to intersect with the formed passage ,
The oil pump becomes compact, which is extremely advantageous when the oil pump is built in the space of the cylinder block, and the size of the cylinder block can be reduced.

Further, since the inlet position of the suction side passage and the outlet position of the discharge side passage are not restricted, there is an advantage that the correspondence between the arrangement position of the oil pump and the oil gallery position is facilitated.

[Brief description of the drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a front view showing a state where a cover is removed.

FIG. 4 is a front view of a conventional oil pump housing.

[Explanation of symbols]

 2 Gear 3 Gear 10 Cylinder Block 11 Oil Pump 12 Cover 13 Suction Chamber 14 Passage 15 Inlet 16 Discharge Chamber 17 Passage 18 Outlet 21 Housing

Claims (1)

(57) [Scope of request for utility model registration] An opening is provided at one end, and a pair of gears meshing with a housing whose opening is closed by a cover are rotatably supported by a shaft, and the housing is built in the rear end of the cylinder block. In the oil pump, a passage communicating with the discharge side or the suction side of the oil pump is formed in the housing, and a passage communicating with the suction side or the discharge side of the oil pump intersects the cover with the passage formed in the housing.
An oil pump for an engine, wherein the oil pump is formed by: