KR20070094070A - Solenoid valve - Google Patents

Abstract

A solenoid valve for fluid control is provided to be used for various purposes by assembling a bobbin on an assembly made of a body, a yoke, a core or the like as one body. A solenoid valve for fluid control includes a bobbin(110), a plunger(120), a body(130), a yoke(140), and a core(150). A coil is wound around the bobbin. The plunger reciprocates at an inner side of the bobbin by magnetic force. The body guides a motion of the plunger between the bobbin and the plunger. The yoke is engaged with one end of the body to prevent the leakage of magnetic field. The core is engaged with another end of the body. The yoke includes a receiving portion(141) and a seal receiving groove(142). The receiving portion is inserted into one end of the body. A brazing filler metal seal is inserted into the seal receiving groove. The core includes a seal insertion groove(151a) in which a brazing filler metal is inserted.

Description

Solenoid valve for fluid control

1-Internal cross-sectional view showing a hydraulic solenoid valve for an automatic transmission of a vehicle according to the prior art

Figure 2-Internal cross-sectional view showing one embodiment of a fluid control solenoid valve according to the present invention

3-front view of FIG. 2

4-Internal cross-sectional view showing a state where a current is applied to the first bobbin.

5-Internal cross-sectional view showing a state where a current is applied to the second bobbin.

<Description of Major Symbols Used in Drawings>

110: bobbin 110a: the first bobbin

110b: second bobbin 111: coil

115: reverse current prevention diode 116: terminal

120: plunger 130: body

131: filler metal seal 140: yoke

141: receiving portion 141a: locking jaw

142: junction 142a: seal receiving groove

150: core 151a: seal fitting groove

160: case 170: holder

171: inlet 172: outlet

173: ring groove 175: O-ring

176: backup ring 180: spool

190: loader 191: pin

The present invention relates to a fluid control solenoid valve, and more particularly, to a fluid control solenoid valve which can be operated smoothly while maintaining airtightness at high pressure and large flow rate by hermetically bonding a yoke and a core to a body by brazing welding. will be.

Solenoid valve is a kind of electronic valve that controls the flow of fluid by installing basic components such as plunger and spring inside and operating them according to the application of electric current.

As such a prior art, a hydraulic solenoid valve for an automatic transmission of a vehicle of Patent Registration No. 363341 will be described briefly. 1 is an internal sectional view showing a hydraulic solenoid valve for an automatic transmission of a vehicle according to the related art.

The prior art has an upper body having a flow path for guiding fluid flow from a valve body of an automatic transmission of a vehicle, a spool disposed inside the upper body to open and close an inlet, and reciprocating the spool to an inlet side of the upper body. A plunger, a bobbin wrapped around the outside of the plunger and a coil wound thereon, a yoke disposed between the upper bobbin and the plunger, a core having a central portion disposed at a bottom of the plunger, and having a hollow formed therein, a bottom of the core, a coil of It has a structure including a case surrounding the outer peripheral portion and the lower end of the upper body.

In the related art, as each component is separately manufactured and assembled, it is impossible to maintain smooth operability and airtightness between components at high pressure and large flow rates. There was a problem.

The present invention devised to solve the problems as described above, while providing a fluid control solenoid valve of a structure that can be easily assembled and manufactured, while maintaining a high operability and airtightness between components at high pressure, large flow rate There is a purpose.

The present invention for achieving the object as described above, the coil is laminated on the outer peripheral surface, the plunger reciprocating by a magnetic force inside the bobbin, the body for guiding the movement of the plunger between the bobbin and the plunger and In the solenoid valve having a yoke coupled to one end of the body to prevent leakage of the magnetic field, and a core coupled to the other end of the body so that the magnetic force generated in the coil is concentrated, the yoke is The body includes a receiving part inserted into one end of the body and having a locking step protruding from the outer end, and a seal receiving groove which is inserted between the locking step of the receiving part and the bobbin and is constrained to fit a filler seal on an inner circumferential surface thereof. It is made of a joint portion which is fitted to the outside of one end of the brazing welding, the core, the filler material to fit the sealant on the outer peripheral surface By having a seal fitting groove in which is inserted inside the other end of the body to a fluid control solenoid valve for brazing weld joint of a technical base.

Here, the bobbin includes a first bobbin for generating a magnetic force for moving the plunger to one side, and a second bobbin installed in series with the first bobbin for generating a magnetic force for moving the plunger to the opposite side. It is preferred to include the examples.

In addition, the bobbin is preferably integrally injection molded by inserting a reverse current prevention diode and a terminal in a state in which the laminated winding coil is accommodated in a metal case, and includes an embodiment in which the bobbin is fitted into the body and assembled.

The solenoid valve may include: a holder having a plurality of inlets and outlets for guiding fluid flow; A spool connected to the inside of the holder to reciprocate to variably form a flow path connected to the inlet and the outlet and to open and adjust the inlet and the outlet; It is preferable to also include other embodiments configured to include; a loader coupled to the pins coupled to each end is inserted into the spool and the plunger, respectively.

The holder has a plurality of ring fitting grooves formed on an outer circumference thereof, and the ring fitting grooves are fitted with an O-ring having a circular cross-sectional shape and a backup ring connected to both sides of the O-ring in a rectangular cross-sectional shape. Do.

Therefore, the yoke and the core are hermetically bonded to the body by brazing welding, so that the hydraulic pressure can be precisely controlled while maintaining the airtightness at high pressure and large flow rate.

In addition, the bobbin and the outer components can be simply molded integrally by injection, and there is another advantage that the bobbin and the core can be used for various purposes by replacing and assembling the bobbin on the assembly in which the body is integrally formed.

The present invention having the configuration as described above will be described in detail with reference to the following drawings. Figure 2 is an internal cross-sectional view showing an embodiment of a fluid control solenoid valve according to the present invention, Figure 3 is a front view of Figure 2, Figure 4, 5 is a state in which a current is applied to the first bobbin and the second bobbin, respectively It is an internal cross-sectional view showing.

The present invention relates to a solenoid valve for fluid control, wherein a solenoid valve having a bobbin 110, a plunger 120, a body 130, a yoke 140, and a core 150 includes the body 130 and a yoke. 140, a rigid structure in which the core 150 is hermetically bonded by brazing welding, has a configuration to smoothly control the high-pressure, high-flow fluid.

In the configuration of a general solenoid valve, the bobbin provides a winding shaft and a winding space portion in which coils are wound on the outer circumferential surface, and the plunger is reciprocated inside the bobbin by a magnetic force generated as a current is applied to the coil. .

Since the solenoid valve according to the present invention has a configuration including the bobbin 110 and the plunger 120 of the known technology having the above configuration and operation principle, the detailed description thereof will be omitted.

In the conventional solenoid valve structure, the yoke is coupled to one end of the bobbin to prevent leakage of the magnetic field, and the core is coupled to the other end of the bobbin so that the magnetic force generated in the coil is concentrated. Has a configuration coupled to both ends based on the bobbin.

However, the present invention does not form the body 130 for guiding the movement of the plunger 120 between the bobbin 110 and the plunger 120 only to a length corresponding to the connection length with the plunger 120, the yoke The connection part to which the 140 and the core 150 can be coupled is further extended to both ends, and the yoke 140 and the core 150 are coupled to both ends of the body 130.

The yoke 140 is composed of a receiving portion 141 and the junction 142, the receiving portion 141 is inserted and coupled to one end of the body 130, the junction 142 is the body 130 Outside the c) is bonded to the body 130 while being constrained between the receiving portion 141 and the bobbin 110.

The accommodating part 141 is press-fitted into the body 130 so as to be inserted into one end of the body 130, and a locking step 141a on the outer end part to restrain the joint part 142. This protrudes.

The joining portion 142 is caught by the catching jaw 141a of the accommodating portion, and the movement in one direction is constrained and coupled to the outer side of the accommodating portion 141 and the body 130, and a filler material therebetween. A seal receiving groove 142a is formed on the inner circumferential surface of the body 130 in contact with the body 130 so as to be brazed.

Brazing is the method of joining two base materials by applying heat below the solidus temperature of the base material with a BRAZING FILLER METAL between the base materials being placed between the base materials. As a result, it can be bonded while preserving the material properties of the base material as it is.

While the filler material seal 131 is inserted into the seal receiving groove 142a, the filler 130 is connected to the outside of the body 130, and the melting temperature of the filler metal seal 131 is higher than the melting temperature of the filler part 142 and the body 130. When placed in a temperature atmosphere below the temperature, the filler metal seal 131 is melted in the seal receiving groove 142a to fill the boundary gap between the junction part 142 and the body 130.

After melting the filler material 131 in a high-temperature atmosphere and cooled in a low-temperature atmosphere, such as the atmospheric temperature, it is hardened as it is, it is firmly bonded to secure the joint between the junction 142 and the body 130 without a gap, the appearance is neat It is maintained, and the post-treatment in the general welding process such as evening or removing the welding bead is not necessary separately.

The core 150 is partly fitted inside the other end of the body 130 and joined to the outer circumferential surface in contact with the inner circumferential surface of the body 130 so that the core 150 can be brazed with a filler material therebetween. The seal fitting groove 151a to which the filler metal seal 131 can be inserted is formed.

When the core 150 is inserted into one end of the body 130, the core 150 is press-fitted into the body 130 like the accommodating part 141 of the yoke, and similarly to the junction 142 of the yoke. It is connected to the body 130 with the filler metal seal 131 inserted in the seal fitting groove 151a.

When the core 150 is connected to the body 130 and placed in a temperature atmosphere below the melting temperature of the filler metal seal 131 and below the melting temperature of the core 150 and the body 130, the filler material is cooled again. The seal 131 fills the boundary gap between the joint part 142 and the body 130 in the seal fitting groove 151a, and firmly bonds and fixes the gap.

In brazing bonding while the yoke 140 and the core 150 are connected to both ends of the body 130, the yoke 140 and the core 150 may be sequentially processed, but the plunger is disposed inside. If the yoke 140 and the core 150 are inserted at both ends of the body 130 at the same time and cooled at a high temperature atmosphere, they can be manufactured more simply.

As the plunger 120, the body 130, the yoke 140, and the core 150 have a structure as one assembly integrally formed, the bobbin 110 having various specifications is replaced on the body assembly. By assembling, each of the solenoids of various uses can be easily manufactured, and the utilization thereof is not only high, but also the productivity can be further improved.

2, 4, and 5 in the embodiment of the present invention, the bobbin 110 is a first bobbin (110a) and the second bobbin (110b) is coupled in series along the longitudinal direction of the body 130 It has a structure, the first bobbin (110a) and the second bobbin (110b) each generates a magnetic force to move the plunger 120 to one side and the opposite side.

2 illustrates a state in which no current is applied to the first bobbin 110a and the second bobbin 110b, and the plunger 120 is positioned between the yoke 140 and the core 150. In addition, a space portion as much as (B) is formed on the right side of the spool 180 by the linkage operation (described below) of the loader 190 and the spool 180 connected to the plunger 120.

4 illustrates a state in which a current is applied to the first bobbin 110a. The plunger 120 is connected to the yoke 140 between the yoke 140 and the core 150 and the spool On the right side of 180, space portions as much as (A) and (B) are formed.

FIG. 5 illustrates a state in which a current is applied to the second bobbin 110b, and the plunger 120 is connected to the core 150 between the yoke 140 core 150 and the spool of the spool. The free space portion is not formed at the right side of the 180.

In the exemplary embodiment, the bobbin 110 includes the first bobbin 110a and the second bobbin 110b. When the current is applied to each bobbin, the bobbin 110 is not applied. As shown in FIG. 2, the flow path may be switched in various ways.

In addition, the first bobbin 110a and the second bobbin 110b respectively laminate the coils 111 on inner bobbins that provide the winding shaft and the winding space of the coil 111, and the inner bobbin is a metal case. In the state accommodated inside the 160, the coil 111 is led to the outside of the case 160 and inserted while the reverse current prevention diode 115 and the terminal 116 are connected to each other to form an integrally injection molded structure. Have

By the metal pressing process and the plastic injection can not only implement a stylish aesthetic combined with the metal and plastic resin, it can be simply integrally molded while maintaining the airtight between the bobbin 110 and the components of the outside.

The solenoid valve of the embodiment is connected to the valve body to adjust the fluid flow by the operation of the above components, comprising a holder 170, the spool 180, the loader 190 has a flow path and fluid flow It has a configuration for switching and controlling.

The holder 170 has a plurality of inlets 171 and outlets 172 for guiding the flow of the fluid in the cylindrical shape of the left and right and the hollow inside is separated in the longitudinal direction, the plurality of outer periphery Ring fitting groove 173 is formed.

The ring fitting groove 173 is fitted with an O-ring 175 having a circular cross-sectional shape and a backup ring 176 having a rectangular cross-sectional shape, and the backup ring 176 is formed inside the ring fitting groove 173. 175 is supported on both sides, and has a stable connection structure capable of maintaining an airtight connection with the valve body without detachment of the O-ring 175 even under high pressure conditions.

The spool 180 is connected to the holder 170 and is connected to the inlet 171 and the outlet 172 as the spool 180 is reciprocated by the operation of the first bobbin 110a and the second bobbin 110b. 2, 4 and 5, the flow path is variably formed and the inlet and outlet 171 and outlet 172 are opened and closed.

The inlet 171 and the outlet 172 is not limited to the same form as the embodiment, but may be configured in various positions or shapes within the scope of the technical idea of the present invention, the processing method is also not limited. In addition, depending on the structure of the valve body in use, the function of inflow or outflow can also be variably interchanged.

A part of the loader 190 may be accommodated in the spool 180 and the plunger 120, and may have a relatively small diameter so as to insert an elastic spring between the yoke 140 and the spool 180. ) And the plunger 120 are formed with grooves for accommodating both ends of the loader 190, respectively.

The loader 190 is fixedly coupled by pins 191 with both ends inserted into the spool 180 and the plunger 120, respectively, so that the plunger 120 is operated by one side of the bobbin 110. When pulled or pushed to the other side, the spool 180 also moves by the same displacement as the plunger 120.

According to the present invention having the above-described configuration, the yoke and the core are joined to the body by brazing welding, and thus, precise hydraulic control is possible while maintaining airtightness at high pressure and large flow rate.

In addition, the bobbin and the external components can be simply molded integrally by injection, and there is another effect that the bobbin and the core can be used for various purposes by replacing and assembling the bobbin on the assembly in which the body is integrally formed.

In addition, when the current is not applied, there is another effect that the flow path can be changed in various ways according to when the current is applied to each of the first bobbin and the second bobbin.

In addition, there is another effect that the O-ring and the back-up ring can be attached to the outside of the holder and connected more tightly on the valve body.

Claims (5)

A bobbin in which coils are wound on the outer circumferential surface, a plunger reciprocated by a magnetic force inside the bobbin, a body for guiding the movement of the plunger between the bobbin and the plunger, and one end of the body to prevent leakage of a magnetic field In the solenoid valve having a yoke coupled to the portion, and a core coupled to the other end of the body to concentrate the magnetic force generated in the coil, The yoke is, It is provided with a receiving portion inserted into one end of the body and the locking projection protruding on the outer end portion, the seal receiving groove that is fitted between the locking projection and the bobbin of the receiving portion and is constrained to fit the filler material seal on the inner circumferential surface It is made of a joint that is fitted to the outside of one end of the body to be brazed welded, The core is, Solenoid valve for fluid control, characterized in that the seal fitting groove for inserting the filler material seal on the outer peripheral surface is inserted into the other end of the body and brazed welded. The method of claim 1, wherein the bobbin, The first bobbin for generating a magnetic force for moving the plunger to one side, and the second bobbin is installed in series with the first bobbin and generates a magnetic force for moving the plunger to the opposite side, characterized in that it comprises Solenoid valve. The bobbin according to claim 1 or 2, wherein the bobbin is Solenoid valve for fluid control, characterized in that the injection molded integrally by inserting the reverse current prevention diode and the terminal in the state accommodated in the laminated coil inside the metal case, fitted into the body. According to claim 1 or 2, wherein the solenoid valve, A holder having a plurality of inlets and outlets for guiding fluid flow; A spool connected to the inside of the holder to reciprocate to variably form a flow path connected to the inlet and the outlet and to open and adjust the inlet and the outlet; And a loader coupled to both ends of the spool and the plunger, the pin being coupled to the spool and the plunger, respectively. The method of claim 4, wherein the holder, A plurality of ring fitting grooves are formed on the outer circumference, and the ring fitting groove is fitted with an O-ring having a circular cross-sectional shape and a backup ring connected to both sides of the O-ring in a rectangular cross-sectional shape to be coupled to each other.

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