KR20120010449A - a vane oil pump for a vehicle - Google Patents

Abstract

PURPOSE: A variable capacity vane oil pump for a vehicle is provided to stably maintain oil discharging pressure by preventing the return of cam rings at an irregular slope. CONSTITUTION: A variable capacity vane oil pump for a vehicle comprises a shaft(150), a rotor(160), a vane(170), a cam ring(120), a body(110), and a soft seal(130). The vane, which has bidirectional freedom, is formed in the slot of the rotor. The vane supplies the oil of an engine according to the rotation of the cam ring. The soft seal is installed between the cam ring and the body. The cam ring prevents the friction between an inner circumference of the camber and a soft seal at variable sections.

Description

Variable capacity vane oil pump for vehicle {a vane oil pump for a vehicle}

The present invention relates to a variable displacement vane oil pump of a vehicle, and more particularly, to a soft seal that can absorb a variable length of a cam ring between the outer circumferential surface of the cam ring and the chamber inner circumferential surface of the body.

In particular, the present invention includes a shaft that receives the driving force of the engine, and a rotor that is press-fitted or restrained to the shaft, and a vane having bidirectional degrees of freedom is installed in a slot of the rotor, thereby providing a shaft and a central axis of the rotor. It relates to a variable displacement vane oil pump of a vehicle in which oil is supplied to an engine by rotating a vane in contact with an inner circumferential surface of a cam ring having a certain amount of eccentricity.

The variable displacement vane oil pump of the vehicle is configured such that one vane and the vanes on both sides thereof change as the camring position changes when the effective volume of the chamber limited by the rotor and the camring is changed. A seal is installed between the outer circumferential surface and the inner circumferential surface of the chamber of the body.

Figure 1a is a front view of the main portion before the variable chamber variable volume vane oil pump of the conventional variable-capacity vane oil pump is shown, Figure 1b is a front view of the main portion after the chamber effective volume variable of the conventional variable-capacity vane oil pump 2 is an enlarged front view of main parts of a variable displacement vane oil pump of a conventional vehicle.

1A, 1B, and 2, the variable displacement vane oil pump of the conventional vehicle is formed in the seal insertion groove 221 formed on the outer circumferential surface of the cam ring 220 having the same center as the inner circumferential surface of the chamber 210. FIG. The type of inserting the hard seal 230 is mainly used.

In the variable displacement vane oil pump 200 of the conventional vehicle, the hard seal 230 installed on the outer circumferential surface of the cam ring 220 has a chamber of the body 210 in a section in which the cam ring 220 is changed by oil discharge pressure. Sealing while sliding in contact with the inner circumferential surface, the variable displacement vane oil pump 200 of the conventional vehicle is a hard seal (A) because the hard seal 230 and the inner circumferential surface of the chamber 210 of the body 210 is in contact with the friction. There was a problem in that the lifespan of the 230 is limited, as well as the loss due to friction. In particular, the hard seal 230 is pushed up relatively smoothly in a section where the rotational speed is increased, but a section in which the rotational speed of the engine is sharply reduced ( In the case of stopping during driving and reducing the speed of the transmission section), the cam ring 220 may take a long time to return or may return to an irregular inclination due to the friction of the hard seal 230. The output pressure could be reduced to a problem that occurs instantaneously.

The present invention has been made in view of the deficiency of the variable-capacity vane oil pump of the conventional vehicle as described above, the purpose is to prevent the wear damage of the seal installed between the cam ring and the body, as well as the seal and An object of the present invention is to provide a variable displacement vane oil pump for a vehicle that enables to improve oil followability caused by friction between bodies.

A variable displacement vane oil pump of a vehicle of the present invention for achieving the above object is characterized in that a soft seal that can absorb a variable length of the cam ring between the outer peripheral surface of the cam ring and the chamber inner peripheral surface of the body is installed. do.

That is, the present invention includes a shaft that receives the driving force of the engine, and a rotor that is pressed or restrained in the shaft, and a vane having bidirectional degrees of freedom is installed in a slot of the rotor so that the shaft and the central axis of the rotor are installed. In constructing a variable displacement vane oil pump of a vehicle which supplies oil to an engine by rotating the vanes in contact with the inner circumferential surface of a cam ring having a certain amount of eccentricity, a soft seal is formed between the cam ring and the body where the regulating pressure is formed. It is installed so that the soft seal does not rub against the inner circumferential surface of the chamber in the section where the cam ring is variable.

In the variable displacement vane oil pump of the vehicle of the present invention, the cam ring is provided with a seal fixing groove on the outer circumferential surface, and the body is provided with a seal fixing groove on the inner circumferential surface of the chamber.

In addition, the soft seal is provided with a cam ring fixing part at one side, a body fixing part is provided at the other side, and an absorbing part configured to absorb a variable length of the cam ring between the cam ring fixing part and the body fixing part.

According to the variable displacement vane oil pump of the vehicle of the present invention, even if the cam ring flows when the volume of the body chamber is changed, the soft seal does not rub against the body or the cam ring, so that the soft seal is not worn or damaged so that the life is maintained semi-permanently. Not only can it be done, but there is also no friction loss, which can improve fuel economy.

In addition, even in a section in which the engine speed is suddenly reduced (stopping during driving, the rotation speed decreases in the shifting section), the cam ring does not return longer or does not return to an irregular inclination, so that the oil discharge pressure can be stably maintained. The oil pressure followability can be secured, which can greatly contribute to improving the performance of the vehicle.

Figure 1a is a front view of the main portion before the variable chamber effective volume of the variable displacement vane oil pump of a conventional vehicle
Figure 1b is a front view of the main part after the chamber effective volume of the conventional variable displacement vane oil pump of the same vehicle
2 is an enlarged front view of main parts of a variable displacement vane oil pump of a conventional vehicle;
3 is a front view of main parts of one embodiment of the present invention;
4A is an enlarged front view of the main portion before changing the chamber effective volume of the embodiment;
4B is an enlarged front view of the main portion after changing the chamber effective volume of the embodiment;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

Fig. 3 shows a main part front view of an embodiment of the present invention, and Fig. 4A shows an enlarged front view of the main part before changing the chamber effective volume of the embodiment, and Fig. 4B shows an enlarged front view of the main part after changing the chamber effective volume of the embodiment. Is shown.

As shown in FIGS. 3, 4A, and 4B, the present invention includes a shaft 150 receiving a driving force of an engine, a rotor 160 press-fitted or restrained to the shaft 150, and a rotor 160. Vanes 170 having bidirectional degrees of freedom are installed in the slots of the vanes, and the vanes 170 are disposed on the inner circumferential surface of the cam ring 120 having a certain amount of eccentricity with the central axis of the shaft 150 and the rotor 160. In forming the variable displacement vane oil pump of the vehicle supplying the oil of the engine by rotating in contact with it, by installing a soft seal 130 between the cam ring 120 and the body 110 in which the regulating pressure is formed. The soft seal 130 does not rub against the inner circumferential surface of the body 110 in the section where the cam ring 120 is variable.

In the illustrated embodiment, the cam ring 120 is provided with a seal fixing groove 121 on the outer circumferential surface, and the body 110 is configured in a form in which the seal fixing groove 111 is provided on the inner circumferential surface of the chamber.

And the soft seal 130 is installed between the outer circumferential surface of the cam ring 120 and the chamber inner circumferential surface of the body 110, the cam ring fixing portion 132 is provided on one side, the body fixing portion 131 is provided on the other side, Between the cam ring fixing portion 132 and the body fixing portion 131 is configured to have an absorbing portion 133 that can absorb the variable length of the cam ring 120.

Reference numeral 140 in the drawing denotes a return spring.

 In the variable displacement vane oil pump 100 of the vehicle according to the present invention configured as described above, the soft seal 130 is cam ring 120 while the cam ring 120 flows and the chamber effective volume of the body 110 is changed. Since no friction occurs with any of the body 110 and the friction loss and wear of the soft seal 130 is not at all, the movement of the cam ring 120 is made smoothly in both the up and down sections of the engine speed.

Therefore, the sensitivity of the regulating pressure due to the discharge pressure increases in the engine speed increase section, and quickly returns by the return spring 140 in the section in which the engine speed decreases, thereby ensuring perfect followability according to the engine speed.

The present invention described above is not limited to the above description, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be obvious to you.

100: variable displacement vane oil pump
110: body
111: seal fixing groove
120: cam ring
121: seal fixing groove
130: soft seal
131: body fixing part
132: cam ring fixing portion
133: absorption part
140: return spring
150: shaft
160: rotor
170: vane

Claims (3)

It has a shaft 150 receives the driving force of the engine, and the rotor 160 is pressed or restrained in the shaft 150, and has a vane (170) having a bidirectional degree of freedom in the slot (Slot) of the rotor 160 The vane 170 of the vehicle which supplies the engine oil by rotating the vane 170 in contact with the inner circumferential surface of the cam ring 120 having a certain amount of eccentricity with the central axis of the shaft 150 and the rotor 160 is rotated. In constructing the pump, the soft seal 130 is installed between the cam ring 120 and the body 110 where the regulating pressure is formed, so that the soft seal 130 is the body 110 in the section where the cam ring 120 is variable. The variable displacement vane oil pump of a vehicle, characterized in that not to friction with the inner peripheral surface of the chamber.
The method of claim 1, wherein the cam ring 120 is provided with a seal fixing groove 121 on the outer circumferential surface, the body 110 is a variable capacity of the vehicle, characterized in that configured in the form of the seal fixing groove 111 is provided on the inner circumferential surface of the chamber. Type vane oil pump.
According to claim 1 or 2, the soft seal 130 is provided with a cam ring fixing portion 132 on one side, the body fixing portion 131 is provided on the other side, the cam ring fixing portion 132 and the body fixing portion A variable displacement vane oil pump for a vehicle, comprising: an absorbing portion 133 configured to absorb a variable length of the cam ring 120 between 131.

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