JPH11336925A - One-way valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a one-way valve for restraining the deformation of a hole so that a valve body is not pushed out to the outside, when the pressure of a flow in fluid is very big. SOLUTION: In this one-way valve device provided with a flow route and an one-way valve which allows the one-way flow of a fluid arranged in this flow route and obstructs the flow of a reverse direction, a regulation member 12 for regulating the deformation of a prescribed value or more produced on the engagingly locking part 9 is provided in the gap formed by an engagingly locking part 9 for engagingly locking the valve body 7 of the one-way valve and the surface of the flow route. Therefore, the generation in the engagingly locking part 9 of the deformation in which the valve body 7 is pushed out to the outside can be regulated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-way valve device disposed in a flow path of a fluid, for permitting the fluid to flow in one direction and restricting the flow in the opposite direction.

[0002]

2. Description of the Related Art Conventionally, on the discharge side of a pump or in a pipe portion where backflow prevention is required, in order to control the flow of fluid,
A one-way valve is provided. FIG.
This is a check valve 66 disclosed in Japanese Patent Application Publication No. 668, and controls the flow of fluid on and off by the advance and retreat of a ball 77.

When the above-described check valve 66 is used, the fluid flowing from the inlet hole 88 is supplied to the ball 77 and the outlet hole 99.
Flows in the direction of arrow A 'from the gap, and during this time, the ball 77 is held in contact with the outlet hole 99 by the pressure of the fluid. Further, when the fluid flows from the outlet hole 99, the ball 77 is held in a state of being pressed against the inner peripheral surface of the inlet hole 88 by the pressure of the fluid, closes the inlet hole 88, and blocks the flow of the fluid.

[0004]

However, if the pressure of the fluid flowing through the inlet hole 88 is extremely large, the outlet hole 99 of the check valve 66 may be deformed, and the ball 77 may be pushed out. When the ball 77 comes out of the check valve 66, not only the function as a one-way valve device is lost but also the flow path may be blocked depending on the flow path shape.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to reduce the deformation of a hole serving as an outlet so that a valve body is not pushed out when the pressure of a flowing fluid is extremely large. It is to provide a one-way valve device for suppressing.

[0006]

In order to solve the above-mentioned problems, a one-way valve device according to the present invention comprises a flow path through which a fluid moves, and a one-way valve disposed in the flow path, the one-way flow of the fluid. A one-way valve that allows flow in the other direction opposite to the one direction, the one-way valve having a through hole communicating with the flow path, A valve seat provided at one end and seated on the valve seat with the fluid force in the other direction, and separated from the valve seat with the fluid force in one direction, thereby blocking or opening the through hole. A one-way valve device, comprising: a valve body, formed on the valve base, and locking the valve body on the one side from the valve body, and a locking portion partially configured to be fragile. A predetermined or greater change that is provided in a gap formed by the road surface of the flow path and the locking portion and that can occur in the locking portion. Constructed and a regulating member for regulating the.

Therefore, when the valve body is in contact with the locking portion by receiving the fluid force in the one direction, the regulating member is interposed between the locking portion and the road surface, whereby It is regulated that the deformation of the locking portion exceeds a predetermined value.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to an example applied to power steering.

As shown in FIG. 1, the power steering is composed of a steering gear 1, a reservoir tank 2, a vane pump 3, and the like, and is provided as a hydraulic booster to reduce a driver's steering operation force.

As shown in FIG. 2, the steering gear 1 includes a power cylinder 4 for generating a force by hydraulic pressure, and a control valve 5 for switching an oil passage.
As shown in FIG. 3, the control valve 5 includes a valve housing 51 and a valve body 52, and is connected to the reservoir tank 2, the vane pump 3, the power cylinder 4, and the like.

The reservoir tank 2 stores the working oil and cleans it with a filter. The vane pump 3 is driven by an engine (not shown) to store the working oil in the reservoir tank 2.
And pump it out. The control valve 5 returns the hydraulic oil sent from the vane pump 3 directly to the reservoir tank 2 when the vehicle is traveling straight, but when the driver turns the steering wheel 15 (FIG. 1) to turn the vehicle. The hydraulic oil sent from the vane pump 3 is sent to the power cylinder 4. Thus, the steering operation force of the driver is reduced.

A one-way valve 6 is provided in the flow passage so that the hydraulic oil does not return when the hydraulic oil is sent from the vane pump 3 to the control valve 5.

As shown in FIG. 4, the one-way valve 6 is inserted into the valve housing 51 in a state where it is connected to the pipe 13 connected to the vane pump 3, and is assembled to the control valve 5. A connector 14 is provided around the end of the pipe 13, and is screwed to the opening 53 of the valve housing 51.

The connecting portion 131 between the pipe 13 and the one-way valve 6 and the one-way valve 6 and the valve valve housing 5
The first contact portion 511 is in close contact with the hydraulic fluid so that hydraulic oil does not leak from the gap. Here, the flow path according to claim 1 includes an insertion portion provided in the pipe 13 and the valve housing 51, and circulates so that the hydraulic oil pumped up from the reservoir tank 2 is sent to the reservoir tank 2 again. 2 shows the passage of the hydraulic oil that has been used.

As shown in FIG. 5, the one-way valve 6 has a valve body 7 having a spherical shape and a valve base 11 having a substantially cylindrical shape.
One end of 1 has a locking portion 9 for preventing the valve element 7 from flowing outside. A through hole 10 and a valve seat 8 extending in the axial direction of the flow path are provided inside the valve base 11, and the valve body 7 is provided.
Is movably arranged between the valve seat portion 8 and the locking portion 9.

Further, a stopper 12 is provided at the tip of the locking portion 9. As shown in FIG. 4, the stopper 12
It has a shape extending radially from the center of the valve body 7 sandwiched by the locking portion 9, and the locking portion 9 and the valve housing 5 are formed.
1 gap. At this time, the stopper 12 is formed so that a small gap a exists between the valve housing 51 and the valve case 11 so that the valve case 11 and the valve valve housing 51 are in close contact with each other at the contact portion 511. Here, the inner wall surface of the insertion site of the piping valve housing 51 is:
It is the road surface of the flow channel described in claim 1.

As shown in FIG. 6, the locking portion 9 is formed by cutting out the side surface of a substantially cylindrical portion extending from the valve base portion 11 at two places.
Are formed, and as shown in FIG.
Consists of two members that are symmetrical about the valve element 7.

When assembling the one-way valve 6, first, FIG.
The valve body 7 (not shown) is inserted into the locking portion 9 in the state of (I), and then, the fragile portion 91 of the locking portion 9 formed by partially reducing the thickness near the stopper is formed. The bending process is performed, and the state shown in FIG. Thereby, as shown in FIG. 7, the interval between the pair of locking portions 9 becomes smaller than the ball diameter of the valve body 7. The stopper 12 is, as shown in FIG.
Although it is formed in a direction substantially perpendicular to the substantially cylindrical axis of the locking portion 9,
By bending the fragile portion 91, the fragile portion 91 has a shape extending in a radial direction with respect to the substantially cylindrical axis.

Next, the operation of the one-way valve 6 will be described.
As shown in FIG. 4, the hydraulic oil pushed out from the vane pump 3 flows into the valve base 11 through the pipe 13 and
Is moved toward the locking portion 9 by the pressure of the hydraulic oil, and is held in contact with the locking portion 9. Then, the hydraulic oil flows out of the gap of the locking portion 9 and flows in the A direction.

When the hydraulic oil flowing backward from the control valve 5 flows into the locking portion 9, as shown in FIG. 5, the valve element 7 moves toward the valve seat 8 by the pressure of the hydraulic oil. , Is pressed against the valve seat 8. Therefore, the through hole 10 is closed, and the hydraulic oil cannot flow in the C direction.

Next, the operation of the stopper 12 will be described. When the hydraulic oil is flowing in the direction A, as shown in FIG.
However, if the pressure of the hydraulic oil is excessively large, the locking portion 9
A strong force is applied in the radial direction from the center of the valve body 7, that is, in the B direction. Therefore, the valve element 7 pushes the gap of the locking portion 9 wide,
The stopper 12 contacts the valve housing 51. At this time, the length of the stopper 12 is set so that the interval between the locking portions 9 is smaller than the diameter of the valve body 7, so that the valve body 7 can be pushed out of the locking portion 9. Deformation can be prevented from occurring in the locking portion 9.

The one-way valve device according to the first aspect includes a flow path, a one-way valve, and a regulating member. In the above embodiment, the pipe 13 and the valve housing 51 are provided.
, A one-way valve 6, and a stopper 12
And correspond respectively.

The one-way valve device of the present invention is not limited to the above embodiment. For example, the stopper 12
The same effect can be obtained by providing the valve housing 51 not only in the locking portion 9 but also in the gap between the locking portion 9 and the valve housing 51. In this case, the gap a shown in FIG. 4 is required between the stopper 12 and the locking portion 9. As shown in FIG. 9, a separate stopper 12 may be provided. It is not necessary that the number of the locking portions is two, and a plurality of locking portions arranged in the circumferential direction when viewed from the axial direction of the through hole 10 by notching the side surface of the substantially cylindrical member at a plurality of locations. Any number is acceptable. In addition, the mounting position of the one-way valve 6 is not limited to the control valve 5, and may be mounted anywhere, such as a cleaning liquid supply device for a window washer or a drainage treatment pump, if it is necessary to regulate the flow in one direction. good. As described above, it goes without saying that various changes can be made without departing from the spirit of the present invention.

As described above, the restricting member provided in the one-way valve device of the present invention causes the locking portion to deform more than a predetermined amount when the valve body receives the fluid force and abuts on the locking portion. Can regulate what happens. Therefore, it is possible to suppress the valve body from being pushed out from the one-way valve, and to sufficiently fulfill the function as the one-way valve device.

[Brief description of the drawings]

FIG. 1 is a perspective view of a power steering according to an embodiment.

FIG. 2 is a perspective view of a steering gear according to the embodiment.

FIG. 3 is a schematic view of a control valve according to the embodiment.

FIG. 4 is a side sectional view showing the vicinity of a one-way valve device in an open state according to the embodiment.

FIG. 5 is a side view showing a one-way valve device in a closed state according to the embodiment.

FIG. 6 is a top view of the one-way valve device as viewed from a direction D in FIG. 5;

FIG. 7 is a front view of the one-way valve device as viewed from a direction C in FIG. 5;

FIG. 8 is a side view showing (I) and (II) before and after bending of a fragile portion of the one-way valve device according to the embodiment.

FIG. 9 is a side sectional view showing the vicinity of a one-way valve device according to another embodiment.

FIG. 10 is a side sectional view showing a conventional check valve.

[Description of Signs] 6 One-way valve 7 Valve 8 Valve seat 9 Locking portion 10 Through hole 11 Valve base 12 Stopper (restriction member) 13 Pipe (flow path) A direction: One direction C direction: Other direction

Claims (1)

[Claims] 1. A flow path through which a fluid moves, and a one-way valve disposed in the flow path, for permitting the flow of the fluid in one direction and preventing the flow in the other direction opposite to the one direction. The one-way valve includes a valve base having a through hole communicating with the flow path, a valve seat provided at one end of the through hole, and a valve seat provided with the fluid force in the other direction. The valve body is formed on the valve base that is seated and is separated from the valve seat by the one-way fluid force to block or open the through-hole, and the valve base is formed on the one-way side of the valve body. A one-way valve device comprising: a locking portion that locks a body and a part of which is fragile; provided in a gap formed by a road surface of the flow path and the locking portion; A one-way valve device, comprising: a regulating member that regulates a deformation of the stop portion that is greater than a predetermined value.