KR100769984B1 - Method of assembling a normal open type solenoid valve in vehicle's abs - Google Patents

Abstract

An assembling method of a normal open type solenoid valve is provided to rapidly and accurately set an air gap between a magnet core and an amateur, and to remarkably improve work efficiency by continuously moving a holder unit until a flange is reached to the meter reading unit. An assembling device of a normal open type solenoid valve comprises a jig unit(10), a holder unit(30) and a meter reading unit(20). The jig unit fixes the solenoid valve. The holder unit controls an air gap between a magnet core and an amateur. The meter reading unit measures the air gap. A method for assembling a normal open type solenoid valve for an ABS(Anti-skid Brake System) of a vehicle comprises the steps of: mounting a valve pre-assembly(6) consisted of the magnet core, a flange, a return spring and a valve sheet on a jig unit; and continuously moving the valve sheet by using the holder unit until the flange of the valve pre-assembly is reached to the meter reading unit waiting at a set position of the air gap.

Description

Method of assembling a normal open solenoid valve for vehicle ABS {Method of assembling a normal open type solenoid valve in vehicle's ABS}

1 is a view illustrating a normal open solenoid valve used in a conventional hydraulic brake system of a vehicle.

Figure 2 is a view showing a normal open solenoid valve assembly for ABS of the vehicle used in the present invention.

3 and 4 are views for explaining the operation of the normal open solenoid valve assembly for ABS of the vehicle used in the present invention.

* Brief description of the major reference marks in the drawings *

1..Valve assembly 1a..Magnetic core

1f..Amateur 3b..Plunger

3d.Return spring 6.Valve assembly

10.Jig part 20.Measurement part

22. Probe 30. Holder part

32. Pusher

The present invention relates to a method for assembling a solenoid valve, and more particularly, to a method for assembling a solenoid valve for ABS of a vehicle capable of quickly and accurately setting an air gap between a magnet core and an armature of a normal open solenoid valve.

The solenoid valve is one of driving devices that are importantly used in a wide variety of industries. The solenoid valve is a device that opens and closes a valve by using induced electromotive force generated after applying current to a coil of the solenoid valve. These solenoid valves are also very useful in driving control of a vehicle, and play an important role in the hydraulic brake system.

1 illustrates a normal open solenoid valve (hereinafter, referred to as a solenoid valve) used in a hydraulic brake system of a conventional vehicle. Referring to the drawings, the solenoid valve 1 is fixed to the modulator block 4 and the valve assembly 1 on which the orifice 1d is perforated is disposed in the axial direction, and the magnetic force is generated when the current is applied. The coil 2a is wound to include a coil assembly 2 composed of a kind of solenoid.

The valve assembly 1 includes a magnet core 1a having an inlet 1b and an outlet 1c and having a lower portion mounted on the modulator block 4, and a magnet core 1a exposed to the outside of the modulator block 4. The sleeve 1f is press-fitted and fixed to the upper portion, and the magnet core 1a is provided with a valve device 3 for moving forward and backward by magnetic force to open and operate the orifice 1d.

The valve device 3 has an armature 3a built in the sleeve 1f so as to be able to move up and down in an up and down direction, and a plunger 3b having a spherical body 3c extending in the shape of a rod under the armature 3a. It is provided. The plunger 3b is arranged to be able to move up and down through the inside of the magnet core 1a, so that the valve surface opens and closes the orifice 1d. A return spring 3d is provided between the lower part of the plunger and the upper part of the valve seat to elastically support the plunger 3b upwardly, so that the valve face of the plunger is normally kept open by the return spring.

By the way, in the conventional solenoid valve having the above configuration, the air gap R interval between the magnet core 1a and the armature 3a is very important. If the interval is larger than the set value, the operation of the valve may be delayed or operation noise may occur. If the interval is smaller than the set value, the flow rate through the orifice 1d may be uneven.

In order to prevent this, conventionally, a solenoid valve assembly device is used to install a valve assembly in which a magnet core 1a, a plunger 3b, a return spring 3d, and a valve seat 1e are assembled to a fixing jig of an assembly device. After positioning, the position of the current magnet core 1a and the plunger 3b was measured, and the correct air gap was set by adding the position of the present valve measured to the set interval.

However, this method of operation requires the first valve to measure the current position of the assembly, the second must be calculated by adding it to the set value, and the third must operate the server motor according to the calculated value. There was a problem.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for assembling a normal open solenoid valve for ABS of a vehicle that can quickly and accurately set the air gap between the magnet core and the armature.

Method for assembling a normally open solenoid valve of a vehicle according to the present invention for achieving the above object is a jig portion for fixing the solenoid valve, a holder portion for adjusting the air gap between the magnet core and the armature, and measuring the air gap By using a solenoid valve assembling device including a metering part, a solenoid valve composed of a magnet core, a plunger, a return spring and a valve seat seats the assembly on the jig, and then the valve plunger of the assembly stands by at the air gap setting position. And continuously moving the valve seat using the holder until reaching the meter reading part being used.

In addition, at this time, the holder is driven by a servo motor, the meter reading unit uses LVDT.

Hereinafter, a method of assembling a normal open solenoid valve for ABS of a vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the solenoid valve assembly described later means that the magnet core, the plunger, the return spring, and the valve seat described above are assembled.

1 is a view showing a normal open solenoid valve assembly for ABS of a vehicle used in the present invention. Referring to the drawings, the solenoid valve assembly device includes a jig part 10 for fixing the valve assembly 6 and a metering part for measuring the air gap R between the magnet core 1a and the armature 3a. A base 6 provided with a base 20 and a holder portion 30 for raising and lowering the upper side of the base 6 to adjust the air gap R of the assembly 6 are provided.

The jig part 10 is provided on the upper surface of the base 6 to support the magnet core 1a of the valve assembly 6. To this end, the jig part 10 is composed of a chuck 12 which can put the stepped portion of the magnet core 1a and a guide 14 which can clamp the side surface.

The meter reading part 20 supports the lower side of the plunger 3b which can be raised and lowered inside the magnet core 1a, and measures the variable position of the plunger 3b. This is because the air gap R of the magnet core 1a and the armature 3a is also the interval between the plunger 3b and the magnet core 1a, which are in contact with the armature 3a and the upper side, and thus the gap ( R) can be identified. For this purpose, the metering unit 20 includes a probe 22 and a measuring unit 24 extending in the longitudinal direction thereof and measuring the lifting of the probe 22. The measurement unit 24 is preferably a linear variable differential transformer (LVDT).

The holder portion 30 adjusts the distance between the plunger 3b and the magnet core 1a by pushing the valve seat 1e inserted into the magnet core 1a. To this end, the holder portion 30 is provided with a pusher 32, the pusher 32 is lifted by a drive means 34, such as a servo motor.

Then, the operation sequence of the normal open solenoid valve assembly for ABS of the vehicle having the above configuration will be described.

First, the valve assembly 6 in which the plunger 3b, the return spring 3d, and the valve seat 1e are provided on the magnet core 1a is fixed to the jig portion 10 of the base 7.

Subsequently, the meter reading part 20 waiting below the jig | tool part 10 is made to wait in the air gap R setting position. Usually, since the plunger 3b in the temporarily assembled state is assembled without protruding from the hollow portion of the magnet core 1a, the probe 22 and the plunger 3b of the metering section 20 are spaced apart.

Subsequently, the holder part 30 is slidably moved to the jig part 10 side. That is, the holder portion 30 is lowered by the drive motor, and thus the pusher 32 pushes the valve seat 1e temporarily assembled to the hollow portion of the magnet core 1a. In addition, the valve seat 1e is pushed in contact with the plunger 3b while overcoming the elastic force of the return spring 3d, and the pushed plunger 3b protrudes out of the magnet core 1a and is located at an air gap setting position. It comes in contact with the probe 22 of the reading part 20 which is waiting. The contact between the plunger 3b and the probe 22 means that the air gap between the magnet core 1a and the armature 1f is set.

When the above operation is completed, the holder 30 is returned to its original position, and the jig sphere 10 releases the fixed valve assembly 6.

Meanwhile, in the above description, the metering unit 20 is positioned below the jig unit 10, and the holder unit 30 is positioned above the jig unit 10, but considering the mass productivity of the product, the metering unit ( 20 is preferably located above the jig part 10, and the holder part 30 is preferably located below the jig part 10.

As described above in detail, the method for assembling the normal open solenoid valve for ABS of the vehicle according to the present invention, after the valve is fixed to the jig part of the assembling device and the reading part is waiting at the air gap setting position, the plunger part is By continuously moving the holder until it comes in contact, the air gap between the magnet core and the armature can be set quickly and accurately. Particularly, in this assembly method, when the air gap of the solenoid valve is initially set, only the holder part is operated afterwards, and thus the work efficiency is remarkably increased as compared with the conventional meter reading part and the holder part.

Claims (3)

In the assembling method using a solenoid valve assembly apparatus comprising a jig portion for fixing the solenoid valve, a holder portion for adjusting the air gap between the magnet core and the armature, and a metering portion for measuring the air gap, After the solenoid valve consisting of the magnet core, the plunger, the return spring and the valve seat seats the assembly on the jig, the valve seat is secured using the holder until the plunger of the assembly reaches the air reading set at the air gap setting position. Assembling a normal open solenoid valve for ABS of a vehicle comprising the step of continuously moving. The method of claim 1, The holder is driven by a servo motor, The method of assembling the normal open solenoid valve for ABS of the vehicle, characterized in that the meter reading unit using LVDT. The method according to claim 1 or 2, The meter reading portion is located on the upper side of the jig portion, the holder portion is located in the lower side of the jig portion assembling method for the normal open solenoid valve for ABS of the vehicle.

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