JP3174164B2 - Hydraulic seat valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic seat valve which is provided with a valve seat on an inflow side and a closing member on an outflow side. At least one outflow channel, which is guided in a longitudinally opposing manner and starts from the casing chamber, is provided on the peripheral surface side, and a guide body is arranged in the casing chamber.
Said closure member with slight play in the radial direction
And the guide body is formed in a sleeve shape.
And a thin peripheral wall that faces the valve seat in the axial direction.
Provided, said peripheral wall starting from a radially extending collar
The guide body is moved by the collar.
Form engaged with the casing wall surrounding the shing chamber
About things .

[0002]

2. Description of the Related Art A seat valve of this type has already been proposed in a hydraulic pressure limiting valve for a brake system for a slip-controlled vehicle (DE-A-39 195) .
Application Publication No. 40304424 ). In a seat valve of this type, the casing chamber is provided with a valve stem for supporting the closing member and a spring acting on the valve stem. When the valve is open, the pressure medium flows through the housing chamber and causes the valve stem and the spring to oscillate, which, together with the oscillating movement of the valve body, results in the generation of noise. However, it is desirable to avoid this for functional and ride reasons.

[0003]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a seat valve in which the generation of noise when the pressure medium flows through is reduced.

[0004]

In order to solve this problem, according to the structure of the present invention, the peripheral wall of the guide body is provided with the closing portion of the seat valve.
Beveled toward the material, the guide body is
Between the collar and the collar
The guide body had a flange which closed the casing chamber on the peripheral side and behind the outflow channel.

[0005]

According to the seat valve of the present invention having the above-described structure, noise generation is significantly reduced. This is because only the closing member of the valve is exposed to the dynamic forces of the flow of the pressure medium in the housing chamber. The valve element, for example a spring, which is arranged outside the housing chamber is sufficiently far from the flow of the pressure medium that it no longer produces noise. Further, the seat valve of the present invention
Provides a simple and advantageous structure for the guide body
You. Guide body is round or oblique between the surrounding wall and the brim
The configuration with the chamfered transition is the casing chamber
This is advantageous for the flow through the inside.

[0006]

[0007]

[0008]

The function of the guide body is extended by the means described in claim 2 . This eliminates the need for a form-locking or material-locking connection between the closing member and the valve stem, thereby preventing the lateral force of the spring from acting on the closing member.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS In the following, two embodiments of the invention will be described in detail with reference to the drawings.

The first embodiment shown in FIG. 1 relates to a hydraulic pressure limiting valve 10 for a slip control type automobile brake device. The pressure limiting valve 10 has a casing 11 with a longitudinal bore 12 in which a valve seat support 13 is press-fitted. The valve seat support 13 is provided with an inflow path 14,
Ends with valve seat 15. The valve seat support 13 is adjacent to the casing chamber 16. An outflow passage 17 extending in the radial direction starts from the casing chamber 16.

Further, a sleeve-shaped guide body 20 is press-fitted in the vertical hole 12 of the casing 11.
The guide body 20 has a flange 21 extending in the radial direction. The guide body 20 is tightly engaged with the wall 22 of the casing 11 following the outflow passage by the collar 21. The guide body 20 starts from the collar 21 and has a thin wall 23 facing the valve seat 15. The longitudinal bore 12 of the housing 11 as well as the longitudinal bore 24 of the guide body 20, which extends coaxially with respect to the valve seat 15, closes the closing member 25, which is configured as a sphere, with slight radial play. It is housed on the seat side. The inlet side valve seat 15 and the outlet side closing member 25 form a seat valve 26 of the hydraulic pressure limiting valve 10.

In the closed position of the seat valve 26 shown in FIG. 1, the closing member 25 acts on the valve seat 15 under the action of the force of a preloaded compression spring 27 housed in the longitudinal bore 12 of the casing 11. are doing. In such a closed position of the seat valve 26, the closing member 25 is surrounded by the peripheral wall 23 of the guide body 20 up to its maximum circumferential line. The peripheral wall 23 of the guide body 20 is chamfered toward the closing member 25 for easy outflow of the pressure medium. Similarly, the peripheral wall 23 of the guide body 20 extending in the axial direction
And a radially extending collar 21 may be provided with a rounded or beveled transition 28 (indicated by dashed lines).

A valve rod 31 is engaged with the vertical hole 24 of the guide body 20. The valve stem 31 has a collar 32 on which a spring 27 indirectly supported by the casing 11 acts. The valve stem 31 is guided with a slight play in the longitudinal bore 24 of the guide body 20 so as to be movable longitudinally. The lateral force of the spring 27 is not transmitted to the closing member 25, since the valve stem 37 only abuts on the closing member 25 on the side opposite to the valve seat 15 only by the action of the spring 27.

The hydraulic pressure limiting valve 10 includes a valve seat support 1.
The pressure of the pressure medium generated in the inflow path 14 of the
7 is opened by the movement of the closing member 25 against the action of the force of No. 7. The pressure medium flows along the surface of the closing member 25 and is guided by the guide body 20 towards the outflow channel 17. Due to the slight play between the closing member 25 and the guide body 20, the valve stem 31 and the spring 27 can be largely immune to the effect of the flow of the pressure medium.

FIG. 2 shows a second embodiment of a hydraulic magnetic valve 35 for a slip control type vehicle brake system.
It is about. Since the electromagnetic valve 35 has a seat valve substantially corresponding to the seat valve 26 of the first embodiment, components having the same functions are denoted by the same reference numerals.
The seat valve 26 of the second embodiment is the valve seat 15 of the valve seat support 13.
And a spherical closing member 25. The valve seat support 13 provided with the inflow passage 14 is connected to the valve casing 1.
The casing chamber 16 is restricted by the guide body 20 accommodated in the one vertical hole 12. An outflow channel 17 starts from this casing chamber in the radial direction. The closing member 25 assigned to the casing chamber 16 is accommodated in the longitudinal hole 24 of the guide body 20 with a slight play in the radial direction. On the side opposite to the casing chamber 16, the closing member 25 is connected, for example by brazing or welding, to a valve stem 31, which is accommodated longitudinally in the longitudinal bore 12 of the casing 11. The other end of the valve stem 31 is connected to the armature 36 of the magnetic valve 35. On the side of the valve stem step 37 opposite to the mover 36, a preloaded compression spring 27 acts. The compression spring is supported by a flange 21 of a guide body 20 which is press-fitted in a vertical hole 12 of a casing 11. Unlike the first embodiment, the spring 27 keeps the seat valve 26 in the open position at the illustrated position of the magnetic valve 35. In this position, the closure member 25 extends beyond its maximum circumference.
The guide body 20 is covered by the thin peripheral wall 23. When the magnetic coil 38 surrounding the mover 36 is excited, the seat valve 26 can be displaced to the closed position. In this closed position, the closing member 25 acts on the valve seat 15 of the valve seat support 13 against the force of the spring 27, blocking the pressure medium from flowing through the valve.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a hydraulic pressure limiting valve having a seat valve.

FIG. 2 is a longitudinal sectional view of a hydraulic magnetic valve having a seat valve.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Pressure limiting valve, 11 Casing, 12 Vertical hole, 13 Valve support, 14 Inflow path, 15
Valve seat, 16 Casing chamber, 17 Outflow channel, 20
Guide body, 21 collar, 22 wall, 23 peripheral wall, 24 vertical hole, 25 closing member, 26 seat valve, 27 spring, 28 transition part, 31 valve stem,
32 collar, 35 magnetic valve, 36 mover, 37
Step, 38 magnetic coil

Continued on the front page (72) Inventor Manfred Hauser Germany Schwieberdien Paradisweg 16 (72) Inventor Reinhard Helms Germany Affalterbach Haufstrasse 41 (72) Inventor Norbert Alase Germany Federal Republic of Mark Groningen Lindenweg 6 (72) Inventor Friedrich Megale Germany Federal Republic of Asperk Ajo Lönweg 13 (56) References Japanese Utility Model Showa 58-140372 (JP, U) West German Patent Application Publication 4023828 (DE, A1) ) West German Patent Application Publication 4030424 (DE, A1) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16K 47/02

Claims (2)

(57) [Claims] 1. A hydraulic seat valve (26), comprising a valve seat (15) on the inflow side and a closing member (25) on the outflow side, wherein the closing member is provided in the casing chamber (16). ) Are guided in the longitudinal direction movably against the force of a spring (27), and at least one outflow channel (17) starting from the housing chamber (16) is provided on the peripheral side. You
And a guide body (20) is arranged in the casing chamber (16).
With a slight radial play.
The guide member (2) surrounds the chain member (25).
0) is configured as a sleeve, and the valve seat is arranged in the axial direction.
Having a thin peripheral wall (23) directed to (15).
Starting from a radially extending collar (21)
And the guide body (2) is provided by the collar (21).
0) is a casing surrounding the casing chamber (16)
In the form of engagement with the wall (22) of the bushing, the peripheral wall (23) of the guide body (20) is connected to the seat valve (2).
6) Beveled toward the closing member (25)
The guide body (20) is in contact with the peripheral wall (23).
Round or beveled between the collar (21)
The guide body (20).
The collar (21) of the outflow channel (17)
Behind, characterized in that it closes the casing chamber (16), hydraulic seat valve. 2. A valve stem (31) in said guide body (20).
There is housed, the valve rod, said spring (27) to the closure member (25) on the basis of the action of which directly abut claim 1 seat valve according.