JPH0247089Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hydraulic control valve device used in a brake device of a vehicle or the like.

(Prior art) As a product of this kind, there has been a
As shown in Publication No. 180758, a hydraulic control valve cartridge formed by assembling necessary parts inside a cylindrical casing equipped with a sealing member for liquid passage division on the outer periphery is inserted into a valve hole opened at one end of the valve body. However, it is known that a plug screwed into the opening is brought into contact with the end of the cartridge, thereby fixing the cartridge in the valve hole. The pressure supplied to a brake actuating device such as a wheel cylinder of the device is reduced to a predetermined pressure or higher so that a preset brake force distribution is achieved.

(Problem to be solved by the invention) Normally, when the hydraulic control valve cartridge is inserted into the valve hole as described above, low-pressure air is injected into the liquid path in order to confirm whether or not the assembly has been performed normally. The pressure of the supplied air is maintained for a predetermined period of time to check the sealing performance of the sealing member and whether necessary parts have been forgotten to be assembled. When the cartridge is fixed by using the plug and the casing, the flat surfaces of the plug and the casing come into contact with each other, so they are sealed against each other, and when the above-mentioned low-pressure air is supplied,
Even if the sealing member is forgotten to be assembled, it is determined that the product does not leak and is in good condition, and is used as is, resulting in a problem of hydraulic pressure leaking during normal braking operation.

An object of the present invention is to provide a hydraulic control valve device that can reliably detect failure to assemble a sealing member and improve safety.

(Means for Solving the Problems) In the present invention, a passage is provided in the plug to communicate between the inside and outside of the valve hole, and a groove-like passage is provided in the abutment area between the plug and the cartridge to communicate this passage with the outer circumferential side of the cartridge. We are trying to provide each.

(Function) When testing pressure is applied to the outer circumference of the cartridge,
When a sealing member is not attached to the outer periphery of the cartridge, the pressure is released to the outside air through the groove-shaped passage and the passage in sequence, so that the test pressure does not increase.

(Effects of the invention) According to the invention, the test pressure increases only after the sealing member is correctly installed, so if the sealing member has been forgotten to be installed, this can be reliably detected.
It is possible to prevent the product from being used as a non-defective product. In addition, for this purpose, it is a simple structure in which a passage and a groove-like passage are formed in a part of the plug and the casing.
It is highly practical.

(Example) FIG. 1 is a sectional view showing an example of the present invention.

In the figure, the hydraulic control valve device as a whole has 1
This device 1 has a valve body 3 with a relatively long valve hole 2 formed therein, and a pair of hydraulic control valve cartridges 4 and 5 inserted symmetrically into the valve hole 2. and a pair of hydraulic control valve cartridges 4,
5 is clamped and fixed between the bottom of the valve hole 2 and the plug 6 by a plug 6 screwed into the opening of the valve hole 2.

Each cartridge 4 and 5 are the same as those mentioned above.
− Same as that shown in Publication No. 180758,
Three liquid path division sealing members 7, 8, 9, 1 on the outer periphery
0, 11, and 12 are installed in grooves 13, 14, 15, 16, 17, and 18 formed in the casings 4a and 5a, and are brought into tight elastic contact with the inner wall of the valve hole 2.
The sealing members 7 and 8 are connected to a first outlet 20 which is connected to a wheel cylinder of a right rear wheel brake system (not shown) through a groove 19 of the valve hole 2, and an outlet 21 of the cartridge 5, and are sealed. The members 8 and 9 communicate with an inlet 22 of the cartridge 5, and also communicate through a groove 23 with a first inlet 24 which is in communication with one pressure chamber of a master cylinder (not shown) and a wheel cylinder of a left front wheel brake system. . Further, the sealing members 10 and 11 communicate with an outlet 25 of the cartridge 4 and a second outlet 27 which is connected to a wheel cylinder (not shown) of the left rear wheel brake device through a groove 26.
1 and 12 communicate with the inlet 28 of the cartridge 4 and a second inlet 30 which is connected through a groove 29 to the other pressure chamber of the master cylinder and the wheel cylinder of the right front wheel brake system. and,
The sealing members 9 and 12 communicate with the outside air through a passage (not shown).

The plug 6 has a hexagonal hole 31 formed in its center, which serves as a fitting portion for a screwing tool, and also has the role of communicating the inside of the valve hole 2 with outside air. A pair of grooves 32 and 33 are provided on the right end surface of the plug 6 in communication with the hexagonal hole 31 and form a passage between the plug 6 and the end surface of the cartridge 5.
3 communicates with the hexagonal hole 31, while extending outward beyond the inner circumferential surface of the valve hole 2 and communicating between the outer circumferential surface of the cartridge 5 and the inner circumferential surface of the valve hole 2.

Reference numeral 34 denotes a cover for preventing water or the like from entering the threaded portion of the plug 6, and is attached so as to close the opening of the valve body 3.

In such a hydraulic pressure control valve device 1, when the hydraulic pressure from the master cylinder exceeds a predetermined value, the pressure is reduced at a predetermined ratio, and this is supplied to the rear wheel brake device, and the pressure of either one of the master cylinders is reduced. In the event of a failure where no pressure is generated in the chamber, pressure reduction control is not performed on the normal system side.

The hydraulic control valve device 1 is subjected to several types of inspections at the manufacturing stage, the most important of which is one related to liquid leakage.

This liquid leakage test is performed when each cartridge 4, 5 is assembled into the valve body 3 and the plug 6 is screwed on before attaching the cover 34. , 12 face the atmosphere, inspection of these sealing members 7, 9, 12 is particularly important. As for the sealing members 9 and 12, since the sealing members 9 and 12 are in communication with the outside air through a hole (not shown) in the valve body 3, forgetting to assemble can be easily detected by inspection using low-pressure air. However, if you forget to assemble the sealing member 9, if the plug 6 and casing 5a
If the grooves 32 and 33 and the hexagonal Since the hole 31 is formed, it can be easily detected, and even if the sealing member 9 is forgotten to be assembled, it is prevented from being judged as a good product.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Hydraulic pressure control valve device, 2... Valve hole, 5... Hydraulic pressure control valve cartridge, 6... Plug, 31...
Hexagonal hole, 32, 33...groove.

Claims (1)

[Scope of utility model registration request] A hydraulic control valve cartridge formed by assembling necessary parts inside a cylindrical casing equipped with a sealing member for liquid path division on the outer periphery is inserted into a valve hole opened at one end of the valve body, and screwed into the opening. In a hydraulic control valve device in which a plug is brought into contact with an end of the cartridge and the cartridge is fixed in the valve hole, a passage communicating between the inside and outside of the valve hole is provided in the plug between the plug and the cartridge. A hydraulic control valve device, wherein a groove-like passage connecting the passage and an outer peripheral side of the cartridge is provided at each contact portion.