JP2580445B2 - Oil pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can reliably remove foreign matters mixed in oil from the oil flowing into the oil when the oil is sucked, and can maintain the removing action for a long time. The present invention relates to an oil pump that allows easy installation, removal, maintenance and management of a screen.

[0002]

2. Description of the Related Art Conventionally, oil pumps such as trochoid pumps have been widely used in general mass-produced engines for pumping oil to an engine lubrication system of an automobile or the like. Oil pumps are also frequently used in electric products such as air conditioners.

[0003] With the oil pump as the center, oil circulates in a lubrication system circuit such as an engine or a compressor. Every time the oil circulates in the circuit, foreign matter such as metal chips gradually removes the oil. Comes dirty.

[0004]

When the oil flowing into the oil pump gradually becomes dirty, the rotor for transporting the oil in the oil pump is damaged by foreign matter in the oil, or the oil circulates. There are problems that adversely affect the circulatory system, such as damaging the devices in the circuit.

[0005]

The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have found that the present invention provides an oil pump having a casing in which a pump body and a pump cover are provided so as to be separable. An oil suction point is provided by opening the pump body at a contact surface position between the pump body and the pump cover, and a housing-shaped filter and a housing filter are provided on a locked portion of a groove provided on an inner wall of the oil suction point. An oil pump is formed by inserting a frame frame of an oil screen composed of a frame frame fixed to the housing-shaped filter and in close contact with the locked portion, and abutting the frame frame with an oil pump cover. As a result, foreign substances in the oil can be reliably removed, and the removing action can be maintained for a long time. Remove and maintenance and management is easy, it is obtained by solving the above-mentioned problems.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Specifically, an oil pump according to the present invention has a trochoid type or gear type rotor body B in the internal oil transportation. As shown in FIG. 3, the pump body 1 and the pump cover 2 are configured so that the pump body 1 and the pump cover 2 can be divided from each other, and a rotor chamber 3 is formed inside the casing A to form a rotor body B.
Is housed.

Specifically, a concave portion is formed in the pump body 1 at a position where the pump body 1 and the pump cover 2 are in contact with each other, and when the pump cover 2 is fixed to the pump body 1, the concave portion is formed in the rotor chamber. The rotor chamber 3 further includes a suction port 4 having a gap shape.
As shown in FIG. 1, the oil flowing through the suction passage 5 reaches the rotor chamber 3 via the suction port 4, so that the suction port 4 and the suction passage 5 are connected to each other. Collectively referred to as oil intake points.

[0008] An oil screen C is mounted on an oil suction point of the casing A. More specifically, the oil screen C is supplied to the oil suction point formed by the suction passage 5 and the suction port 4. Is the direct rotor body B
The oil screen C is adapted to remove foreign matter from the oil flowing into the oil pump and filter the oil. A specific example of the oil screen C is shown in FIG. 2 (a). As described above, it is mainly composed of the housing-shaped filter 6 formed in a housing shape and the frame-shaped frame 7.

As shown in FIG. 2, the casing filter 6 of the oil screen C is formed in a cubic casing shape, or in a cylindrical, conical or hemispherical shape. The housing-like filter 6 is formed so as to protrude on either one of them.

In the oil screen C using the housing-shaped filter 6, as shown in FIG. 2 (b), the surface of the housing-shaped filter 6 is further formed in a zigzag shape to have a bellows-shaped surface 6a. There is also an embodiment in which the surface area of the housing-like filter 6 is increased, and the filtering performance can be increased while being relatively small.

When the oil screen C is mounted inside the casing A, as shown in FIG.
d, 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 connected to the suction port 4.
Are inserted into and attached to the locked portions d, d,... Formed on all the wall surfaces of the pump, and come into contact with the pump cover 2.
For this reason, the outer peripheral edge of the frame-shaped frame 7 is inserted into the locked portion d in a watertight manner.

Since the above-mentioned oil screen C has the housing-like filter 6, the housing-like filter 6 itself has a volume, and the screening effect can be enhanced as compared with a planar filter.

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

The rotor body B is, as shown in FIG.
The outer rotor 8 provided with the internal teeth and the inner rotor 9 provided with the external teeth are eccentrically housed while meshing with each other, and the teeth have a trochoid curve, and the teeth of the inner rotor 9 are When the number of teeth of the rotor 8 is one less and the inner rotor 9 makes one rotation, the outer rotor 8
Are configured to rotate one tooth later.

In addition, the tooth tip of the inner rotor 9 always comes into contact with the tooth tip or the tooth bottom of the outer rotor 8 regardless of the rotation angle, and the adjacent tooth tip of the inner rotor 9 and the outer rotor Are formed between the outer rotor 8 and the inner rotor 9, while the outer rotor 8 and the inner rotor 9 rotate, the volume of each of the voids s increases and decreases, and suction and discharge are performed.

Further, as another embodiment of the rotor body B,
Although not shown, there is a circumscribed or inscribed gear type. The inner rotor 9 is rotated by receiving power from the outside on a drive shaft 10, and the drive shaft 10 is present at a place where the oil pump of the drive side device is mounted, or is mounted on the oil pump side (not shown). 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,
The drive shaft 10 communicates with the outside of the casing A.
In the embodiment shown in the figure, 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 connected to a rotor body B such as an inner rotor 9 of the oil pump.
In addition to the above-described embodiment, there is an embodiment in which the drive shaft 10 is provided in an oil pump.

[0018]

According to the present invention, in an oil pump having a casing A in which a pump body 1 and a pump cover 2 are provided so as to be able to be divided, the pump body 1 at a contact surface position between the pump body 1 and the pump cover 2 is provided. The housing filter 6 is fixed to the housing filter 6 and the locked portion d is fixed to a locked portion d of a groove provided on an inner wall of the oil suction portion. Frame 7 of oil screen C composed of frame 7 closely adhering to
And the frame-shaped frame 7 and the oil pump cover 2 are brought into contact with each other, so that the oil pump can be set almost watertight first, and the screening can be reliably performed. In addition, the oil screen C can be easily attached and detached, and maintenance and management can be easily performed. Thirdly, the pump itself can be made compact.

The above effects will be described in detail. In an oil pump having a casing A in which a pump body 1 and a pump cover 2 are provided so as to be splittable, the pump body 1 at a contact surface position between the pump body 1 and the pump cover 2 is provided. The housing filter 6 is fixed to the housing filter 6 and the locked portion d is fixed to a locked portion d of a groove provided on an inner wall of the oil suction portion. By inserting and mounting the frame 7 of the oil screen C composed of the frame 7 that is in close contact with the oil screen C, the frame 7 of the oil screen C is It is set substantially watertight between the locked portion d of the groove and the oil pump cover 2, and at the suction point of the pump, the locked portion d and the frame-shaped frame of the oil screen C are set. Oil passing between the arm 7 is easily and reliably prevented. That is, the suction oil always flows through the casing filter 5 of the oil screen C, and there is an advantage that foreign matter of the fluid can be removed by the casing filter 5 and flown to the pump.

Further, in the present invention, the oil screen C
Is set substantially watertight between the locked portion d of the groove and the oil pump cover 2, so that the oil screen C can be easily replaced by removing the pump cover 2 from the pump body 1, and mounting the oil screen C There is an advantage that it can be easily removed and further maintained and managed.

Further, the oil screen C according to the present invention is provided with a housing-like filter 6, which can increase the area of the filter portion because of the housing-like shape, thereby removing foreign matter in the fluid over a wide range. And reliable removal of foreign substances. Further, since the oil screen C has a housing shape, the oil screen C easily fits in the suction port 4, does not have a large volume, and can be downsized.

[Brief description of the drawings]

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

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

FIG. 3 is a vertical sectional side view of the pump.

[Explanation of symbols]

 A: Casing C: Oil screen d: Locked part 1: Pump body 2: Pump cover 4: Suction port 5: Suction path 6: Housing filter 7: Frame frame

Claims (1)

(57) [Claims] 1. The pump body and the pump cover can be divided.
In an oil pump having a casing provided for
The pump at the contact surface position between the pump body and the pump cover
An oil suction point is provided by opening to the body,
At the locked part of the groove provided on the inner wall of the entry location,
Fixed to the filter and the housing-shaped filter and closely
Frame of the oil screen
Frame, insert the frame and the oil pump
Oil pump characterized by contact with a bar