JPH0623696Y2 - Hydraulic pressure regulator with engine damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a hydraulic pressure regulating valve with a damper for an engine, and more particularly, to prevent chattering due to a change in hydraulic pressure to prolong the life of the hydraulic pressure regulating valve. The present invention relates to a hydraulic pressure regulating valve with a damper for an engine.

<Prior Art> Generally, an engine is provided with a hydraulic pressure regulating valve in order to regulate the supply pressure of lubricating oil below a certain level.

A conventional hydraulic pressure regulating valve is configured, for example, as shown in FIG. 2, such that the valve body 3 is elastically pressed against the valve seat 4 by the pressure setting spring 2 against the internal pressure of the lubricating hydraulic pressure passage 1. When the internal pressure of the feed passage 1 exceeds a predetermined value, the pressure setting spring 2 is shortened, the valve hole 5 of the valve seat 4 is opened, and a part of the lubricating oil in the lubricating hydraulic feed passage 1 is passed from the valve hole 5 to the valve chamber 6 After that, the internal pressure of the lubrication hydraulic pressure passage 1 is reduced by being released to the drain hole 7.

<Problems to be Solved by the Invention> According to this conventional hydraulic pressure regulating valve, a part of the lubricating oil in the lubricating hydraulic pressure passage 1 is released from the valve hole 5 to the drain hole 7 through the valve chamber 6 and the lubricating oil pressure is increased. When the internal pressure of the feeding passage 1 is reduced, the valve body 3 is struck by the pressure setting spring 2 against the valve seat 4, noise is generated, and the valve body 3 and the valve seat 4 are damaged, and the space between the valve seat and the valve body is deteriorated. There is a risk that the sealed state of will be destroyed and the internal pressure of the lubricating oil pressure passage 1 will not rise to the set value.

As a conventional technique for preventing this, a full-fledged Japanese Utility Model Publication 57-15891
As disclosed in Japanese Unexamined Patent Publication (Kokai) No. 0, a damper chamber is provided between a valve body and a valve seat, the damper chamber is communicated with a lubricating hydraulic pressure passage through a gap, and the valve body is slowly seated. is there. However, in this conventional technique, it takes time for the valve element to be seated on the valve seat and to be reliably closed, and the pressure receiving area of the valve element increases during this time, so the relief start pressure of the lubrication hydraulic pressure passage is higher than the set value. There is a problem that the low state continues for a long time.

The present invention has been made in consideration of the above circumstances, and can prevent chattering due to pressure oil fluctuations to prolong the life of the hydraulic pressure regulator valve, and can be closed quickly.
An object of the present invention is to provide a hydraulic pressure regulating valve with a damper for an engine in which fluctuations in relief start pressure of a lubricating hydraulic pressure passage are reduced.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the hydraulic pressure regulating valve for an engine according to the present invention has, for example, a valve chamber at one end of the valve chamber 6 as shown in FIG. The valve hole 5 having a diameter smaller than 6 is opened, and the drain hole 7 is opened in the peripheral wall of the valve chamber 6 at a predetermined distance from the inner end of the valve hole 5, and is slidably inserted into the valve chamber 6. The valve body 3 to be inserted into and removed from the valve hole 5 is continuously provided on one end surface of the piston 8, and the valve body 3 inserted into the valve hole 5 is configured to seal the valve hole 5 and the inside of the valve chamber 6 is formed. The damper chamber 9 is formed in a portion closer to the valve hole 5 than the drain hole 7, and the damper chamber 9 is communicated with the drain hole 7 through the throttle passage 10.

<Operation> According to the hydraulic pressure regulating valve with the damper of the engine according to the present invention,
When the internal pressure of the lubrication hydraulic pressure passage is reduced below a predetermined value and the piston and valve body are pushed toward the valve hole side by the pressure setting spring,
After the piston has passed through the drain hole, the damper chamber is defined on the valve body side of the piston in the valve chamber. Since this damper chamber communicates with the drain hole through the throttle channel, the internal pressure of the damper chamber rises and becomes a movement resistance of the piston and the valve body,
The piston stops smoothly without being hit at one end of the valve chamber.

Moreover, since the valve body is inserted into the valve hole, not only the valve chamber but also the damper chamber formed inside the valve chamber are shut off from the lubrication hydraulic pressure passage and sealed, so that the pressure receiving area of the valve body is immediately closed. It becomes equal to the pressure receiving area at that time, and the valve does not open until the lubricating hydraulic pressure passage reaches the set pressure, and the relief starts when the set pressure rises.

<Embodiment> A hydraulic pressure regulating valve with a damper for an engine according to an embodiment of the present invention will be described below with reference to FIG.

A drain hole 7 is opened at a predetermined distance from the valve hole 5 side in the peripheral wall of the valve chamber 6 that communicates with the lubricating hydraulic pressure passage 1 through the valve hole 5. The valve hole 5 has a smaller diameter than the valve chamber 6, and
It is arranged coaxially with the valve chamber 6. A piston 8 is inserted in the valve chamber 6 so as to be movable back and forth, and the piston 8 is urged toward the valve hole 5 side by a pressure setting spring 2.

A valve body 3 to be inserted into and removed from the valve hole 8 is continuously provided on an end surface of the piston 8 on the valve hole 5 side. When the valve body 3 is inserted into the valve hole 5, the valve hole 5 is inserted into the valve body 3. It is designed to be hermetically sealed with. A damper chamber 9 is defined on the valve body 3 side of the piston 8 in the valve chamber 6, and the damper chamber 9 is communicated with the drain hole 7 by a throttle passage 10.

According to this hydraulic pressure regulating valve with an engine damper, when the internal pressure of the lubricating hydraulic pressure passage 1 rises above a predetermined set pressure, the pressure setting spring 2 is shortened and the valve body 3 is withdrawn from the valve hole 5 into the valve chamber 6. Then, a part of the pressure oil in the lubrication hydraulic pressure passage 1 is partially discharged into the valve hole 5 and the valve chamber 6.
After that, it is released to the drain hole 7 and the internal pressure of the lubrication hydraulic pressure passage 1 is reduced. Then, when the internal pressure of the lubrication hydraulic pressure passage 1 is reduced to a predetermined pressure, the pressure setting spring 2 extends and moves the piston 8 and the valve body 3 to the valve hole 5 side. The piston 8 passes through the drain hole 7 and moves to the valve hole 5 side, and the valve body 3 moves to the valve hole 5 side.
, The damper chamber 9 formed on the valve body 3 side of the piston 8 in the valve chamber 6 is cut off from the lubricating hydraulic pressure passage 1 and is in communication with the drain hole 7 and the throttle passage 10. The internal pressure of the damper chamber 9 rises. By this boost, piston 8
And the moving speed of the valve element 3 is reduced, and the piston 8 moves to the valve chamber 6
The collision with the end surface of the valve hole 5 side is prevented.

As a result, the life of the hydraulic pressure regulating valve can be extended, and the pressure setting function due to such damage can be prevented from deteriorating.
It is possible to prevent the occurrence of damage due to the collision of the valve hole 4 with the valve hole 4.

<Effect of the Invention> As described above, according to the present invention, when the hydraulic pressure regulating valve is closed, a part of the drain oil is contained in the valve chamber to weaken the biasing force of the pressure setting spring. It is possible to prevent the piston from hitting the end wall of the valve and to prevent the occurrence of damage due to chattering of the valve seat and the valve body. as a result,
The pressure regulating function of the hydraulic pressure regulating valve can be maintained for a long period of time, and the life of the hydraulic pressure regulating valve can be extended.

Moreover, when the valve body is inserted into the valve hole, the valve immediately closes and the relief start pressure of the lubrication hydraulic pressure passage returns to the set value, so the valve opening time is shortened and the relief start pressure fluctuates. Can be reduced, and the lubricating oil pressure passage can be satisfactorily regulated.

[Brief description of drawings]

FIG. 1 is a sectional view of a hydraulic pressure regulating valve with a damper of an engine according to an embodiment of the present invention, and FIG. 2 is a sectional view of a hydraulic pressure regulating valve of a conventional engine. 3 ... valve body, 5 ... valve hole, 6 ... valve chamber, 7 ... drain hole, 8 ... piston, 9 ... damper chamber, 10 ... throttle passage.

Claims (1)

[Scope of utility model registration request] 1. A valve hole (5) having a diameter smaller than that of the valve chamber (6) is opened at one end of the valve chamber (6), and a valve is provided at a predetermined distance from the inner end of the valve hole (5). The drain hole (7) is opened in the peripheral wall of the chamber (6), and the valve body (5) is inserted into and removed from the valve hole (5) at one end surface of the piston (8) slidably inserted into the valve chamber (6). Valve body (3) inserted in valve hole (5)
The valve hole (5) can be sealed with the valve chamber (6), and a damper chamber (9) is formed in a portion of the valve chamber (6) closer to the valve hole (5) than the drain hole (7). A hydraulic pressure regulating valve with a damper for an engine, characterized in that (9) is communicated with a drain hole (7) through a throttle channel (10).