KR101181234B1 - Solenoid valve for brake system - Google Patents

Abstract

Disclosed are a solenoid valve for a brake system that can be easily manufactured and can reduce manufacturing costs. The disclosed solenoid valve includes a seat support member having a flange formed in a cup shape by a deep drawing process, an oil flow path formed around the flange, and fixed to a modulator block; A valve seat member installed in the seat support member and having a first orifice; A cylindrical sleeve whose one end enters into the sheet support member and is coupled; A valve core coupled to a sleeve opposite the seat support member; An opening and closing member installed in the sleeve and the sheet support member and having a first opening and closing portion for opening and closing the first orifice and a second orifice smaller than the first orifice; An amateur provided retractably in the sleeve and having a second opening and closing portion for opening and closing the second orifice; A restoring spring for pressing the armature toward the second orifice; An opening spring for moving the opening / closing member toward the armature for opening the first orifice.

Description

Solenoid Valve for Brake System {SOLENOID VALVE FOR BRAKE SYSTEM}

The present invention relates to a solenoid valve for a brake system, and more particularly to a solenoid valve for a brake system that can be easily manufactured and the manufacturing cost can be reduced.

The vehicle's anti-lock brake system senses the wheel's slip and controls the braking pressure on the wheel to prevent the wheel from locking up during braking. Safe braking is achieved by keeping the wheels directional without braking.

The brake system includes a plurality of solenoid valves for opening and closing the flow path of the brake hydraulic line. The solenoid valves employed in the brake system include a normally open solenoid valve that normally maintains an open state, and a normally closed solenoid valve that normally maintains a closed state.

Figure 1 shows a conventional normal closed solenoid valve. The valve is coupled to a valve housing (3) fixed to the bore (2) of the modulator block (1), a cylindrical sleeve (4) coupled to the valve housing (3), and a sleeve (4) opposite the valve housing (3). An armature 6 provided in the valve core 5 and the sleeve 4 in such a manner as to be movable forward and backward is provided. In addition, the valve seat 7 is press-fitted and fixed in the valve housing 3, and the valve seat 7 provided with the first orifice 7a, and installed in the valve housing 3, is retracted and has a second orifice 8a smaller than the first orifice 7a. And an opening and closing member 8 having an opening and closing portion 8b for opening and closing the first orifice 7a at a lower portion thereof.

Such a solenoid valve has a relatively small second orifice 8a opening first when the armature 6 moves toward the valve core 5 by a magnetic force, and upstream of the second orifice 8a after opening the second orifice 8a. When the downstream pressure difference becomes small, the relatively large first orifice 7a is opened by the opening spring 9 pushing the opening / closing member 8. Therefore, such a solenoid valve can easily open the flow path even with a small force.

The solenoid valve described above has a problem in that it is difficult to manufacture because the complicated shape of the valve housing and the opening and closing member must be manufactured by cutting. Therefore, manufacturing cost was also high.

In addition, the above-described solenoid valve is coupled to the sleeve and the valve core by welding, and the sleeve and the valve housing are also joined by welding, so there is a drawback in that assembly productivity is low because there is a lot of labor for these couplings.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and an object of the present invention is to provide a solenoid valve for a brake system that facilitates manufacturing and also reduces manufacturing costs.

A solenoid valve for a brake system according to the present invention for achieving the above object is a seat support member having a flange formed in a cup shape by a deep drawing process, an oil flow path is formed around the flange fixed to the modulator block; A valve seat member installed in the seat support member and having a first orifice; A cylindrical sleeve having one end coupled to the inside of the sheet support member; A valve core coupled to the sleeve opposite the seat support member; An opening and closing member installed in the sleeve and the sheet support member and having a first opening and closing portion for opening and closing the first orifice and a second orifice smaller than the first orifice; An armature removably mounted in the sleeve and having a second opening and closing portion for opening and closing the second orifice; A restoring spring for pressing the armature toward the second orifice; And an opening spring for moving the opening and closing member toward the armature to open the first orifice.

The opening and closing member is formed by a deep drawing process and includes a cylindrical body portion provided with the first opening part at the bottom, and a sheet portion coupled to the upper portion of the body portion and the second orifice is formed.

The sleeve is provided with a spring support for supporting one end of the open spring, and the opening and closing member is provided with a stepped spring support jaw for supporting the other end of the open spring.

The seat supporting member has a stepped step of decreasing an inner diameter toward the inside of the bore from the inlet side of the bore to support the sleeve and the valve seat member.

The solenoid valve according to the present invention has an effect that can be manufactured more easily than the conventional because the seat support member and the sleeve can be manufactured by deep drawing processing.

In addition, the solenoid valve according to the present invention can be easily assembled because the flange of the seat support member is directly fixed to the modulator block. In addition, since the valve core and the sleeve are coupled by the coupling groove and the locking portion, the valve core and the sleeve are easier to manufacture than the related art, and thus the manufacturing cost can be reduced.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the solenoid valve for the brake system according to the present invention includes a seat support member 10, a cylindrical sleeve 20, a valve seat member 30 inside the seat support member 10, and a sleeve 20. It has a valve core 40 coupled to the end. In addition, the opening and closing member 50, the armature 60, and the excitation coil assembly 70 provided on the outside of the sleeve for the opening and closing operation of the flow path.

The sheet support member 10 is installed to enter the bore 101 of the modulator block 100. The sheet support member 10 is provided in the shape of a circular cup with an open top, and has a stepped step portion 11 whose outer diameter is reduced from the top to the bottom. An oil passage 12 is formed around the sheet support member 10 so that the inside and the outside communicate in a radial direction, and the lower portion thereof is opened to communicate with the discharge passage 103 of the modulator block 100. The upper end of the sheet support member 10 is provided with a flange 13 fixed to the inlet side of the bore 101 of the modulator block 100. The sheet support member 10 can be easily manufactured by deep drawing processing of a plate.

The sleeve 20 is provided in a cylindrical shape with both ends open. The sleeve 20 has a lower outer surface coupled to the inside of the sheet supporting member 10. The sleeve 20 may also be manufactured by a deep drawing process similarly to the sheet support member 10.

The valve seat member 30 is installed in the seat support member 10. The valve seat member 30 has a cylindrical shape with a first orifice 31 formed in the center thereof. The valve seat member 30 may be manufactured by forging, and the outer surface is press-fitted and fixed in the seat supporting member 10. The valve seat member 30 is supported by the stepped portion 11 of the seat support member 10 to maintain a stable coupling.

The opening and closing member 50 includes a cylindrical body portion 51 formed by a deep drawing process of a sheet material, and a sheet portion 52 provided on the upper portion of the body portion 51. The first opening and closing part 53 for opening and closing the first orifice 31 is provided under the body part 51. In the seat portion 52, a second orifice 54 having a diameter smaller than that of the first orifice 31 is formed. The opening / closing member 50 is installed in the sleeve 20 and the sheet support member 10 so that the first opening and closing part 53 may open and close the first orifice 31.

An opening spring 55 for moving the opening and closing member 50 in the direction of opening the first orifice 31 is installed outside the opening and closing member 50. The open spring 55 is supported by a spring support 21 provided in a form in which the lower end is bent inwardly at the lower end of the sleeve 20, and the upper end is stepped on the upper side of the body 51 of the opening and closing member 50. It is supported by the spring support jaw 56 formed to have. Accordingly, the opening and closing member 50 may move in the direction of opening the first orifice 31 by the elasticity of the open spring 55 to open the first orifice 31.

A cylindrical filter member 15 is installed outside the sheet support member 10. The filter member 15 filters foreign matters from the oil flowing into the oil channel 12 of the sheet support member 10 from the inflow channel 102 of the modulator block 100. The filter member 15 is installed to enter the bore 101 of the modulator block 100 together with the sheet support member 10 in a state of being mounted on the outer surface of the sheet support member 10.

The valve core 40 is coupled to press the upper end of the sleeve 20 to close the top opening of the sleeve 20. As shown in FIG. 5, the coupling groove 41 is formed on the outer surface of the valve core 40 along the circumference for coupling the valve core 40 and the sleeve 20, and the sleeve 20 is deformed by deformation. The engaging portion 23 is provided to enter the engaging groove 41 is provided. This allows the valve core 40 to be fixed to the sleeve 20 by entering the valve core 40 into the sleeve 20 and forming the catching portion 23 by deformation. This coupling structure makes the coupling of the sleeve 20 and the valve core 40 easier than the conventional welding method, and also allows the coupling process to be simplified.

The armature 60 is installed in the sleeve 20 so as to be able to move up and down. The armature 60 has a cylindrical shape with an outer diameter corresponding to the inner diameter of the sleeve 20, and is provided with a second opening / closing portion 61 for opening and closing the second orifice 54 at a lower end thereof. This is to allow the second opening and closing portion 61 to open and close the second orifice 54 by the advancing and retracting motion of the amateur (60).

Between the armature 60 and the valve core 40, a restoring spring 65 for pressing the armature 60 toward the opening and closing member 50 is provided. Restoration spring 65 is accommodated in the spring receiving groove 66 formed on the armature (60). This is because the restoring spring 65 presses the armature 60 toward the opening and closing member 50 so that the second opening and closing part 61 can normally close the second orifice 54. Restoring spring 65 is made of a greater elasticity than the open spring 55 to overcome the elastic force of the open spring 55 and to press the amateur 60 and the opening and closing member 50.

The excitation coil assembly 70 is provided in a cylindrical shape and is coupled to the upper outer surface of the valve core 40 and the sleeve 20. The excitation coil assembly 70 includes a cylindrical coil case 71, a bobbin 72 accommodated in the coil case 71, and an excitation coil 73 wound on an outer surface of the bobbin 72. The magnetic field is formed when the excitation coil 73 is applied with power to move the armature 60 toward the valve core 40 so as to open the second orifice 54.

When the solenoid valve is mounted on the modulator block 100, the seat support member 10 is mounted on the seat support member 10 outside the seat support member 10 coupled with the sleeve 20. Enter the bore 101. In this state, the inlet side of the bore 101 of the modulator block 100 is deformed. In this case, since the deformable portion 110 of the modulator block 100 is deformed to cover the flange of the seat support member, the flange is fixed so that the valve is fixed.

Since the solenoid valve for the brake system can manufacture the seat support member 10, the sleeve 20, and the body portion 51 of the opening and closing member 50 by deep drawing processing, the configuration can be simplified and easier than before. Can be manufactured. In addition, in the present embodiment, the valve core 40 and the sleeve 20 are also coupled by the coupling groove 41 and the locking portion 23, so that the coupling is easy.

The following describes the opening and closing operation of such a solenoid valve.

As shown in FIG. 2, when power is not applied to the excitation coil assembly 70, the restoring spring 65 pushes the armature 60 toward the second orifice 54. 2 Close the orifice 54. In addition, since the opening and closing member 50 is pressed by the pressing force of the restoring spring 65, the first orifice 31 is also closed. Therefore, in this case, the oil does not flow from the inflow passage 102 of the modulator block 100 toward the discharge passage 103.

When power is applied to the excitation coil assembly 70, as shown in FIG. 3, the armature 60 causes elasticity of the restoring spring 65 by a magnetic force acting between the armature 60 and the valve core 40. The second orifice 54 is opened by winning and moving toward the valve core 40. When the second orifice 54 is opened, the oil of the inflow passage 102 passes through the filter member 15 and then through the oil passage 12 of the sheet support member 10 and the sleeve (10). 20) flows into. This oil flows through the second orifice 54 and toward the discharge passage 103.

If the pressure difference between the upstream and downstream of the second orifice 54 decreases after the second orifice 54 is first opened, as shown in FIG. 4, the opening and closing member 50 is raised by the elasticity of the opening spring 55. Therefore, the first orifice 31 having a large diameter is opened. Therefore, the oil flows toward the discharge passage 103 through the first orifice 31 having a larger diameter and not through the second orifice 54. As described above, the solenoid valve of the present invention has a small diameter because the second orifice 54 is opened first, and then the first orifice 31 having a larger diameter is opened. It can be opened easily.

1 is a cross-sectional view of a conventional solenoid valve for a brake system.

2 is a cross-sectional view of a solenoid valve for a brake system according to the present invention, in which the first and second orifices are closed.

3 is a cross-sectional view of a solenoid valve for a brake system according to the present invention, showing a state in which the second orifice is opened.

4 is a cross-sectional view of a solenoid valve for a brake system according to the present invention, showing a state in which the first orifice is opened.

5 is a detailed view of part V of FIG. 2.

Explanation of symbols on the main parts of the drawings

10: seat support member 12: oil path

13: flange 20: sleeve

30: valve seat member 31: first orifice

40: valve core 50: opening and closing member

54: second orifice 55: open spring

60: amateur 70: female coil assembly

Claims (4)

A sheet support member installed in the bore of the modulator block and formed into a cup shape by a deep drawing process, an oil flow path formed around the flange, and having a flange fixed to the modulator block at an upper portion thereof; A valve seat member installed in the seat support member and having a first orifice; A cylindrical sleeve having one end coupled to the inside of the sheet support member; A valve core coupled to the sleeve opposite the seat support member; An opening and closing member installed in the sleeve and the sheet support member and having a first opening and closing portion for opening and closing the first orifice and a second orifice smaller than the first orifice; An armature removably mounted in the sleeve and having a second opening and closing portion for opening and closing the second orifice; A restoring spring for pressing the armature toward the second orifice; A solenoid valve for a brake system, characterized in that it comprises an opening spring for moving the opening and closing member toward the amateur to open the first orifice. The method of claim 1, The opening and closing member is a solenoid valve for a brake system, which is formed by a deep drawing process and includes a cylindrical body portion provided with the first opening portion at a lower end, and a seat portion coupled to an upper portion of the body portion and having a second orifice formed thereon. . The method of claim 1, The sleeve is provided with a spring support for supporting the one end of the open spring, the solenoid valve for a brake system, characterized in that the opening member is provided with a stepped spring support jaw for supporting the other end of the open spring. The method of claim 1, And the seat supporting member has a stepped step of reducing an inner diameter toward the inside of the bore from the inlet side of the bore to support the sleeve and the valve seat member.

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