JPH0674015A - Oil pump - Google Patents

Abstract

PURPOSE:To provide an oil pump for surely removing foreign matters mixed into the oil pump from oil flowing in the oil pump in the intake of the oil, maintain the removing operation for an extremely long period and make a casing A compact. CONSTITUTION:An oil intake spot consisting of an intake port 4 and intake path 5 is provided in a casing A. An oil screen C having a housing-like filter 6 formed like a housing body in the oil intake spot is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pump capable of reliably removing foreign substances mixed in the oil from the oil flowing into the oil when the oil is sucked, and maintaining the removing action for a long time. Regarding

[0002]

2. Description of the Related Art Conventionally, an oil pump such as a trochoid pump has been widely used for general mass-produced engines as a means for pumping oil to an engine lubrication system of an automobile or the like. In addition, oil pumps are often used in electric products such as air conditioners.

The oil circulates in the lubrication system circuit of the engine, the compressor, etc. centering on the oil pump. Every time the oil circulates in the circuit, the oil gradually becomes foreign due to foreign matter such as metal chips. Becomes dirty.

[0004]

However, when the oil flowing into the oil pump gradually becomes dirty, the rotor body for transporting oil in the oil pump is damaged by foreign matter in the oil, or the oil circulates. There are problems such as damage to equipment in the circuit, which adversely affect the circulation system.

[0005]

Therefore, as a result of intensive studies, the inventors of the present invention have found that the present invention provides a case-like filter formed in a case-like shape at an oil suction portion inside a casing. By using the oil pump provided with the oil screen, the foreign matter in the oil can be reliably removed, and the removing action can be maintained for a long time, which solves the above problems.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. Specifically, an oil pump according to the present invention has a trochoid type or gear type rotor body B for internal oil transportation. As shown in FIG. 6, the casing A has a pump body 1 and a pump cover 2 which are separable from each other. A rotor chamber 3 is formed inside the casing A and a rotor body B is formed.
Is housed.

Specifically, a recess is formed in the pump body 1, and the recess is formed as the rotor chamber 3 when the pump cover 2 is fixed to the pump body 1, and further the rotor chamber 3 is provided. Is a suction port 4 with a void shape
As shown in FIG. 1, the oil flowing in through the suction passage 5 reaches the rotor chamber 3 through the suction port 4, and the suction port 4 and the suction passage 5 are connected to each other. Collectively referred to as the oil intake point.

An oil screen C is attached to an oil intake portion of the casing A. Specifically, the oil screen C is an oil flowing into an oil intake portion constituted by an intake passage 5 and an intake port 4. Is the rotor body B directly
2A shows a concrete example of the oil screen C, which removes foreign matters of the oil flowing into the oil pump and filters it. As described above, it is mainly composed of the housing-shaped filter 6 and the frame 7 which are formed in a housing shape.

The casing filter 6 of the oil screen C is, as shown in FIG. 2, formed in a cubic casing shape, a cylindrical shape, a conical shape, or a hemispherical shape. It is formed so as to bulge in one direction.

In the oil screen C using the housing filter 6, as shown in FIG. 2 (b), the surface of the housing filter 6 is further formed into a zigzag shape and formed of a bellows-like surface 6a. There is also an example in which the surface area of the housing filter 6 is widened, and the filtration performance can be made large while being relatively small.

When the oil screen C is mounted inside the casing A, as shown in FIG.
d is formed, the locked portion d is formed as a groove, the outer peripheral edge of the frame 7 of the oil screen C is inserted, and the frame 7 is formed on the entire wall surface of the suction port 4. While being inserted into the locked parts d, d, ...
The structure comes into contact with the pump cover 2.

Since the above-mentioned oil screen C has the housing-shaped filter 6, the housing-shaped filter 6 itself has a volume, and the screening effect can be enhanced more than a flat filter.

Next, the oil screen C is connected to the suction passage 5
There is also an embodiment in which the suction port 4 and the suction passage 5 are substantially separated from each other as shown in FIG. 3, so that the inner diameter of the suction passage 5 can be accommodated. The housing filter 6 of the oil screen C is shown in FIG.
As shown in (a), it is formed into a cylindrical shape, or as shown in FIG. 4 (b), is formed into a conical shape, and in this embodiment, as shown in FIG. A locked portion d is formed in the passage 5, and is used for mounting the oil screen C by the locked portion d.

Next, as shown in FIG. 5, the oil screen C may be attached to the inlet of the suction passage 5, and the oil screen C used in this embodiment is as follows.
Similar to the above-described embodiment, as shown in FIGS. 4A and 4B, the housing filter 6 has a cylindrical shape or a conical shape.

Further, the housing filter 6 of the oil screen C is made of metal formed in a net shape, but synthetic resin may be used as long as it has strong mechanical strength. .

The rotor body B is, as shown in FIG.
An outer rotor 8 provided with inner teeth and an inner rotor 9 provided with outer teeth are eccentrically installed while meshing with each other, and the teeth thereof are trochoidal curves, and the teeth of the inner rotor 9 are outer. When the inner rotor 9 makes one revolution, the outer rotor 8 has one tooth less than the number of teeth of the rotor 8.
Are configured to rotate with a delay of one tooth.

Further, in the inner rotor 9, the tooth tips of the inner rotor 9 are always in contact with the tooth tips or the tooth bottoms of the outer rotor 8 regardless of the rotation angle, so that the outer rotor and the adjacent tooth tips of the inner rotor 9 are always in contact with each other. , A plurality of voids s are formed between them and the outer rotor 8 and the inner rotor 9 rotate, and the volume of each void s increases / decreases to perform suction and discharge.

As another embodiment of the rotor body B,
Although not shown, there are also external or internal gear type wheels. The inner rotor 9 rotates by receiving power from the outside on the drive shaft 10, and the drive shaft 10 is present at a position where the oil pump of the drive side device is installed, or, although not shown, mounted on the oil pump side. It may be done.

The discharge port 11 is formed in the pump cover 2 as shown in FIG.
a is formed in the drive shaft 10 along the axial direction thereof,
It communicates with the outside of the casing A, and its drive shaft 10 is
In the illustrated embodiment, a drive mechanism D such as an engine is provided, and when the oil pump is mounted on the drive mechanism D, the drive shaft 10 is a rotor body B such as an inner rotor 9 of the oil pump.
In addition to the above embodiment, there is an embodiment in which the drive shaft 10 is provided in the oil pump.

[0020]

According to the present invention, the case-like filter 6 formed in a case-like shape at the oil suction portion inside the casing A.
Since the oil pump is provided with the oil screen C having, the first effect is that screening can be reliably performed, and secondly, the pump itself can be made compact.

To explain the above effect in detail, the oil screen C has a housing filter 6, and since the housing filter 6 has a predetermined volume, the area of the filter becomes large and It is possible to remove the foreign matter in a wide range, and surely remove the foreign matter.

Further, the oil screen C is attached to the suction port 4
Since it is attached to the oil suction point consisting of the suction passage 5 and the suction passage 5, it can be easily replaced by removing the pump cover 2 from the pump body 1, and maintenance and management can be extremely facilitated. In particular, as shown in FIG. In the embodiment in which the oil screen C is provided at the inlet portion of the suction passage 5, the oil screen C is removed from the pump body 1 without removing the pump cover 2.
Can be exchanged.

Next, the oil screen C has the housing-shaped filter 6, so that the area of the filter portion can be widened, and since the oil screen C is formed in the housing-like shape, it can be easily accommodated in the suction port 4 and has a large size. Volume,
The pump can be downsized.

[0024]

[Brief description of drawings]

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

FIG. 2A is a perspective view of an oil screen, and FIG. 2B is a schematic view of the oil screen.

FIG. 3 is a front view of another embodiment.

FIG. 4 (a) is a perspective view of an embodiment in which the housing filter is cylindrical, and FIG. 4 (b) is a perspective view of an embodiment in which the housing filter is conical.

FIG. 5 is a front view of another embodiment.

FIG. 6 is a vertical sectional side view of the pump.

[Explanation of symbols]

 A ... Casing C ... Oil screen 6 ... Casing filter

Claims (1)

[Claims] 1. An oil pump comprising an oil screen having a housing-shaped filter formed in a housing shape at an oil suction portion inside a casing.