KR102656924B1 - Solenoid valve device for electronic control suspension - Google Patents

Abstract

The present invention relates to a solenoid valve device for an electronically controlled suspension system that can improve operational reliability, reduce operating load on the driving part, and increase response speed while omitting permanent magnets made of rare earth elements. . According to the invention, there is provided a valve housing; a valve opening/closing unit provided at the upper end of the valve housing and configured to allow or block the flow of working fluid transferred to the air spring; and a valve opening/closing drive unit provided inside the valve housing and configured to operate the opening/closing operation of the valve opening/closing unit depending on whether power is applied, wherein the valve opening/closing unit has an inlet flow path and an discharge flow path for the working fluid. A solenoid valve device for an electronically controlled suspension system is provided, including a flow path forming holder in which a is formed, and valve opening/closing means configured to open and close an inlet flow path side of the flow path forming holder.

Description

Solenoid valve device for electronic control suspension {SOLENOID VALVE DEVICE FOR ELECTRONIC CONTROL SUSPENSION}

The present invention relates to a solenoid valve device for an electronically controlled suspension system. More specifically, the present invention relates to a solenoid valve device for an electronically controlled suspension system. More specifically, the operation reliability can be improved while omitting a permanent magnet made of rare earth elements, the operating load on the driving part can be reduced, and the response speed can be improved. It relates to a solenoid valve device for an electronically controlled suspension system that can increase.

In general, an electronic control suspension system (ECS) applied to automobiles automatically adjusts the height and damping force of the vehicle body according to road surface conditions, driving conditions, mode selection, etc. detected by sensors.

In particular, in the case of air spring suspension, the damping force is variably adjusted by controlling the on/off of the solenoid valve.

In the case of conventional solenoid valves, permanent magnets are applied to generate large force in the solenoid valve. These permanent magnets are made from rare earth elements, and Korea mostly relies on imports. Therefore, as the product cannot be applied during industrial disputes among countries, there is a need to develop a solenoid valve that can achieve the same level of performance or higher with a device excluding permanent magnets.

In this regard, as an example of a solenoid valve in which a conventional permanent magnet is omitted, Patent Publication No. 10-2010-0022652 (Patent 1) discloses a solenoid valve that controls high-pressure air flowing in and out of an air spring.

Since the solenoid valve of Patent 1 is filled with high-pressure air on the inlet side, a large magnetic force is required to control the on/off of the solenoid valve, and therefore a large-capacity solenoid valve is required or a large magnetic force is required to control the opening and closing of the solenoid valve. There was a problem with increased power consumption.

Republic of Korea Patent Publication No. 10-2010-0022652 (published March 3, 2010) Republic of Korea Patent Publication No. 10-1944990 (announced on February 1, 2019) Republic of Korea Patent Publication No. 10-2157830 (announced on September 21, 2020) Republic of Korea Patent Publication No. 10-1944974 (announced on February 7, 2019)

Therefore, the present invention to solve the above-described conventional problems can improve operational reliability, reduce the operating load on the driving unit, and increase response speed while omitting the permanent magnet made of rare earth elements. The purpose is to provide a solenoid valve device for an electronically controlled suspension system.

The problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to one aspect of the present invention for achieving the above objects and other features of the present invention, there is a solenoid valve employed in an electronically controlled suspension system, comprising: a valve housing; a valve opening/closing unit provided at the upper end of the valve housing and configured to allow or block the flow of working fluid transferred to the air spring; and a valve opening/closing drive unit provided inside the valve housing and configured to operate the opening/closing operation of the valve opening/closing unit depending on whether power is applied, wherein the valve opening/closing unit has an inlet flow path and an discharge flow path for the working fluid. A flow path forming holder is formed, and a valve opening and closing means configured to open and close an inlet flow path side of the flow path forming holder, wherein the valve housing includes a body case, an injection mold body provided at a lower portion of the body case, and the It includes a cover body that covers the bottom of the body case while exposing the lower part of the injection mold to the outside, and the valve opening/closing driving unit includes a core, a plunger provided to move up and down with respect to the core, and A yoke accommodating a lower part and the plunger, a bobbin provided to surround the yoke, a coil wound around the outer circumferential surface of the bobbin, and a yoke penetrating the center of the core and the center of the plunger, wherein the upper end is provided as the valve opening/closing unit. It is coupled to, and the lower end includes a lifting rod member supported on the upper surface of the injection mold body, and an elastic member provided between the plunger and the lifting rod member and configured to apply an elastic force to the lifting rod member in a downward direction. A solenoid valve device for an electronically controlled suspension system is provided.

In the present invention, the injection mold body and the yoke are hooked, and a sealing member may be provided on the upper surface of the injection mold body.

In the present invention, the valve opening and closing means includes a valve body accommodated in the yoke, and a valve head coupled to the upper end of the valve body to open or close the flow path, and a damper is provided on the upper edge and lower surface of the valve body. It can be provided.

In the present invention, the core is formed by bending the lower part into two or more stages, and the bobbin may be bent into a shape corresponding to the shape of the lower part of the core.

In the present invention, when the plunger moves upward and comes into contact with the core, the lower part of the core and the upper part of the plunger may be formed in a concave-convex manner.

In the present invention, the lower part of the core may be formed as a wedge-shaped protrusion protruding downward, and the upper part of the plunger may be formed as a wedge-shaped groove whose shape corresponds to the shape of the protruding part of the core.

In the present invention, the lifting rod member includes a first rod member at one end of which the valve head is coupled, and a second rod whose one end is coupled to the first rod member and the other end of which is supported on the upper surface of the injection mold body. A coupling hole having a screw thread is formed in one of one end of the first rod member and one end of the second rod member, and one end of the first rod member and one end of the second rod member are formed. The other one of the screw threads is formed as a thread coupling portion that is threaded with the thread of the coupling hole, and the lower end of the second rod member may be formed with a bolt head or an extended extension extending outward.

In the present invention, an elastic member receiving groove is formed in the central portion of the lower surface of the yoke, and the elastic member may be positioned between the bottom surface of the elastic member receiving groove and the bolt head portion of the second rod member. .

The solenoid valve device for an electronically controlled suspension according to the present invention provides the following effects.

First, the present invention does not require permanent magnets made of rare earth elements, which has the effect of resolving the problem of product production disruption due to industrial disputes in countries.

Second, the present invention has the effect of increasing durability and service life by ensuring operational reliability while reducing the operating load of the driving part when turning on/off the solenoid.

Third, the present invention has the effect of directly transmitting the acting force to the closing component when the power is turned off, thereby speeding up the response speed during closing, and thus allowing quick adjustment of the height and damping force of the vehicle body.

The effects of the present invention are not limited to those mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

1 is a perspective view showing a solenoid valve device for an electronically controlled suspension system according to the present invention.
Figure 2 is a cross-sectional view showing a solenoid valve device for an electronically controlled suspension system according to the present invention.
Figure 3 is an exploded perspective view showing a solenoid valve device for an electronically controlled suspension system according to the present invention.
Figure 4 is an exploded perspective view showing some components included in the solenoid valve device for an electronically controlled suspension system according to the present invention.

Additional objects, features and advantages of the present invention may be more clearly understood from the following detailed description and accompanying drawings.

Prior to a detailed description of the present invention, it should be noted that the present invention is capable of various modifications and may have various embodiments, and the examples described below and shown in the drawings are not intended to limit the present invention to specific embodiments. No, it should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

In addition, terms such as "...unit", "...unit", and "...module" used in the specification refer to a unit that processes at least one function or operation, which is hardware or software or hardware and It can be implemented through a combination of software.

In addition, when describing with reference to the accompanying drawings, identical components will be assigned the same reference numerals regardless of the reference numerals, and overlapping descriptions thereof will be omitted. In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

Hereinafter, a solenoid valve device for an electronically controlled suspension system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a perspective view showing a solenoid valve device for an electronically controlled suspension according to the present invention, Figure 2 is a cross-sectional view showing a solenoid valve device for an electronically controlled suspension according to the present invention, and Figure 3 is an electronically controlled suspension according to the present invention. It is an exploded perspective view showing a solenoid valve device for a device, and Figure 4 is an exploded perspective view showing some components included in the solenoid valve device for an electronically controlled suspension device according to the present invention.

The solenoid valve for an electronically controlled suspension system according to the present invention is a solenoid valve employed in an electronically controlled suspension system applied to automobiles. As shown in FIGS. 1 to 4, it largely consists of a valve housing 100 and a valve opening/closing unit ( 200) and a valve opening/closing drive unit 300.

Specifically, the solenoid valve for an electronically controlled suspension system according to the present invention is a solenoid valve employed in an electronically controlled suspension system applied to an automobile, and as shown in FIGS. 1 to 4, the solenoid valve includes a valve housing 100; A valve opening/closing unit 200 provided at the upper end of the valve housing 100 and configured to allow or block the flow of working fluid transferred to the air spring (not shown); and a valve opening/closing drive unit 300 provided inside the valve housing 100 and configured to operate the opening/closing operation of the valve opening/closing unit 200 depending on whether or not power is applied.

The valve housing 100 includes a body case 110 formed in a cylindrical shape, a block-shaped injection mold body 120 inserted into the lower end of the body case 110, and the injection mold body 120. ) includes a cover body 130 that covers the bottom of the body case 110 while exposing it to the outside.

The body case 110 is formed by curling and bending the upper and lower ends of the body case 110, preventing the movement of each component inside the body case, and preventing foreign substances such as moisture from entering the body. It is prevented.

A locking groove is formed on the upper surface of the injection mold body 120 into which a hook formed at the lower end of the bobbin 340 of the valve opening/closing drive unit 300, which will be described below, is secured. A receptacle 121 to which a connector (not shown) for supplying power is coupled protrudes from the lower surface of the injection mold body 120. Additionally, a terminal 122 is provided inside the injection mold body 120 to transmit power supplied through the receptacle 121 to the valve opening/closing drive unit 300, which will be described below.

Here, a sealing member 123 is provided as an airtight portion on the surface (upper surface) of the injection mold body 120 facing the yoke 350.

In the present invention, the sealing member 123 is provided only on the side of the lifting drive unit, thereby reducing the operating load of the lifting drive unit during on/off driving.

In addition, the cover body 130 is formed with a hole through which the receptacle 121 of the injection mold body 120 extends outward, and the injection mold body 120 is press-fitted and fixed.

Subsequently, the valve opening/closing unit 200 is a component provided at the upper end of the valve housing 100 and configured to allow or block the flow of working fluid transferred to the air spring (not shown), and the inflow of working fluid. It includes a flow path forming holder 210 in which a flow path and a discharge flow path are formed, and a valve opening and closing means 220 configured to open and close the inlet flow path side of the flow path forming holder 210.

Specifically, the flow path forming holder 210 is formed as a whole in a block shape, and an inlet flow path 211 through which the working fluid is supplied is formed in the axial central part, and the working fluid is formed in the lateral (direction perpendicular to the axial direction) central part. A plurality of discharge passages 212 through which the gas is discharged are formed at intervals in the circumferential direction.

Here, the inlet flow path 211 is formed in a tapered shape with a diameter that decreases from the top to the bottom, and the discharge flow path 212 is formed radially arranged at intervals in the circumferential direction.

The valve opening/closing means 220 is provided on the lower side of the flow path forming holder 210 and allows or blocks the flow of working fluid transferred to the air spring by intermitting communication between the inlet flow path 211 and the discharge flow path 212. do.

The valve opening and closing means 220 is coupled to a valve body 221 that is movably installed with respect to the inlet flow path 211 and the upper end of the valve body 221, and opens or moves the inflow flow path 211 when it moves. It includes a valve head 222 that closes, and a damper 223 coupled to the bottom of the valve body 221 to prevent vibration and noise when the valve body 221 moves.

The valve body 221 is formed in a cylindrical shape or a pillar shape penetrating in the axial direction (up and down direction in the drawing).

Here, at the upper edge of the valve body 221, the valve body 221 contacts the lower surface of the flow path forming holder 210 where the inlet flow path 211 is formed to increase sealing force when closed and to prevent vibration and noise. An upper damper 224 is provided for.

The valve body 221 is inserted into a mounting groove formed in the core of the valve opening and closing driving unit 300, which will be described in detail below, and a portion (upper part) protrudes above the core, and the valve opening and closing driving unit 300 is raised and lowered. It is raised or lowered by means (plunger and rod (or pusher)).

The upper end of the valve body 221 extends outward (radially) and has a diameter larger than the inlet flow path 211 so that the inlet flow path 211 can be opened or closed when the valve opening and closing means 220 moves. do.

Additionally, the valve head 222 is formed in a cone shape with a rounded top.

The valve head 222 is coupled (for example, hooked) to the upper end of the rod of the lifting member of the valve opening/closing drive unit 300 that extends through the through portion of the valve body 221.

Next, the valve opening and closing driving unit 300 is a component provided inside the valve housing 100 and configured to operate the opening and closing operation of the valve opening and closing unit 200 depending on whether or not power is applied.

Specifically, the valve opening/closing driving unit 300 is provided with a core 310 in which the valve body 221 is accommodated in the center, a lower part of the core 310, and moves up and down opposite to the core 310. It is formed in the shape of a hollow spool, a plunger 320 that is provided, a lower part of the core 310, and a yoke 330 in which the plunger 320 is provided, and the yoke 330 ), a bobbin 340 provided to surround the bobbin 310, a coil 350 wound around the outer peripheral surface of the bobbin 310, and a coil 350 provided to penetrate the center of the core 310 and the center of the plunger 320, and the upper end portion. is coupled to the valve opening and closing unit 200, the lower end of which is supported on the upper surface of the injection mold body 120, a lifting rod member (or pusher) 360, and the plunger 320 and the lifting rod member 360 It includes an elastic member 370 provided in the liver and configured to apply elastic force to the lifting rod member 360 in a downward direction.

The core 310 is a fixed iron core that induces the magnetic field generated in the coil 340.

The core 310 has a receiving groove 311 in which the valve head 222 is accommodated at the top, and a through passage 312 through which the lifting rod member 350 extends.

The core 310 is formed by bending the lower outer side in two or more stages, and the diameter of the lower side is formed to be small.

The plunger 320 is a movable iron core that moves by a magnetic field induced by the core 310 and the yoke 330. The plunger 320 is movably provided inside the yoke 330. This plunger 320 is moved by the attractive force caused by the magnetic field induced by the core 310 and yoke 330 when power is applied to raise the valve opening and closing means 220, and is moved by the elastic member 370 when power is cut off. and lowers the valve opening/closing means (220).

In the core 310 and the plunger 320, when the plunger 320 moves upward and comes into contact with the core 310, the lower part of the core 310 and the upper part of the plunger 320 are unevenly coupled. It is formed by

In other words, the lower part of the core 310 is formed as a wedge-shaped protrusion protruding downward, and the upper part of the plunger 320 has a wedge-shaped groove corresponding to the shape of the protrusion of the core 310. is formed

The yoke 330 is a fixed iron core that induces the magnetic force generated by the coil 350. The yoke 330 has a cylindrical shape with an open top surrounding the lower part of the core 310 and the sides and lower part of the plunger 320. It is formed by

The bobbin 340 is made of synthetic resin to electrically block between the core 310 and the coil 350, and between the yoke 330 and the coil 350.

As shown in the drawing, the bobbin 340 has its upper side surrounding a portion of the core 310 and is formed with a stepped portion corresponding to the stepped external shape of the core 310.

By forming the bobbin 340 as described above, the number of turns of the coil can be further increased.

The coil 350 is a conductive wire that generates a magnetic field when power is applied, and is tightly and uniformly wound around the outer peripheral surface of the bobbin 340 to form a cylindrical shape. When power is applied, the magnetic field generated by the coil 350 is induced by the core 310 and the yoke 350 and moves the plunger 320. At this time, the strength of the magnetic field is proportional to the strength of the current flowing along the coil 350 and the number of coils 350 wound around the bobbin 310.

Continuing, the lifting rod member 360 is a component that raises and lowers the valve structure 200 when the plunger 320 moves.

In the present invention, the lifting rod member 360 includes a first rod member 361 to which the valve head 121 is coupled to an upper end, and an upper end to be coupled to the first rod member 361 and the other end to the injection mold body. It includes a second rod member 362 supported on the upper surface of 120.

Here, the first rod member 361 and the second rod member 362 may be configured to be coupled by a screw thread coupling method.

In other words, a coupling hole in which a thread is formed is formed at one of the lower end of the first rod member 361 and the upper end of the second rod member 362, and the lower end of the first rod member 361 and the second rod are formed. The other one of the upper ends of the member 362 is formed as a threaded portion that is threadedly coupled to the threaded thread of the coupling hole.

The lower end of the second rod member 362 is formed with a bolt head or an extended extension extending outward.

The lifting rod member 360 configured in this way adjusts the degree of coupling between the first rod member 361 and the second rod member 362 to adjust the length of the space where the elastic member 370 is applied, thereby forming the elastic member 370. ) can be adjusted.

Additionally, the elastic member 370 is interposed between the lifting rod member 360 and the plunger 320 and serves to move the plunger 320 downward when power is turned off.

The elastic member 370 may be formed as a coil spring.

In the present invention, the elastic member 370 is provided between the lower part of the plunger 320 and the lower part of the lifting rod member 360.

Specifically, an elastic member receiving groove 371 is formed in the central portion of the lower surface of the plunger 320 and the yoke 33, and the elastic member 370 surrounds the lifting rod member 360 and has one end of the elastic member receiving groove ( 371), and the other end is supported and positioned inside the bolt head portion of the second rod member 362.

The elastic member 370 provided in this way can provide a fast response speed when closing by collectively moving the lifting rod member 360 in the direction of opening the passage using elastic restoring force when the power is turned off.

According to the solenoid valve for an electronically controlled suspension system according to the present invention as described above, it does not require permanent magnets made of rare earth elements, so it is possible to solve the problem of product production disruption due to industrial disputes in countries, and the solenoid's It is possible to secure operational reliability while reducing the operating load of the driving part when turning on/off, thereby increasing durability and service life. When the power is turned off, the force is directly transmitted to the closing component, which speeds up the response speed when closing. Accordingly, there is an advantage of being able to quickly adjust the height and damping force of the vehicle body.

The embodiments described in this specification and the accompanying drawings merely illustratively illustrate some of the technical ideas included in the present invention. Accordingly, the embodiments disclosed in this specification are not intended to limit the technical idea of the present invention, but rather to explain it, and therefore, it is obvious that the scope of the technical idea of the present invention is not limited by these embodiments. All modifications and specific embodiments that can be easily inferred by a person skilled in the art within the scope of the technical idea included in the specification and drawings of the present invention should be construed as being included in the scope of the present invention.

100: valve housing
110: body case
120: Injection mold body
121: Receptacle
122: terminal
123: Sealing member
130: cover body
200: Valve opening/closing unit
210: Flow path forming holder
211: Inflow flow path
212: Discharge flow path
220: valve opening and closing means
221: valve body
222: valve head
223, 224: Damper
300: Valve opening/closing drive unit
310: core
311: Acceptance home
312: Through passage
320: plunger
330: York
340: Bobbin
350: coil
360: lifting rod member (or pusher)
361: first rod member
362: second rod member
370: Elastic member
371: Elastic member receiving groove

Claims (8)

A solenoid valve used in an electronically controlled suspension system,
valve housing;
a valve opening/closing unit provided at the upper end of the valve housing and configured to allow or block the flow of working fluid transferred to the air spring; and
A valve opening/closing drive unit provided inside the valve housing and configured to operate the opening/closing operation of the valve opening/closing unit depending on whether power is applied,
The valve opening and closing unit includes a flow path forming holder in which an inlet flow path and an outlet flow path of the working fluid are formed, and a valve opening and closing means configured to open and close the inlet flow path side of the flow path forming holder,
The valve housing includes a body case, an injection mold body provided at a lower portion of the body case, and a cover body that covers the lower end of the body case while exposing the lower portion of the injection mold body to the outside,
The valve opening and closing drive unit includes a core, a plunger provided to move up and down with respect to the core, a yoke that accommodates a lower part of the core and the plunger, a bobbin provided to surround the yoke, and an outer peripheral surface of the bobbin. a coil wound around the core, a lifting rod member provided through the center of the core and the center of the plunger, the upper end of which is coupled to the valve opening and closing unit, and the lower end of which is supported on the upper surface of the injection mold body, and the plunger and the It includes an elastic member provided between the lifting rod members and configured to apply an elastic force to the lifting rod member in a downward direction,
The lifting rod member includes a first rod member, one end of which is coupled to the valve head, and a second rod member, one end of which is coupled to the first rod member and the other end of which is supported on the upper surface of the injection mold body,
A coupling hole having a screw thread is formed at one end of the first rod member and one end of the second rod member, and the other one of the one end of the first rod member and the end of the second rod member is formed as above. The thread part that is connected to the thread of the coupling hole is formed as a screw coupling part,
The lower end of the second rod member is formed with a bolt head or an extended extension extending outward.
Solenoid valve device for electronically controlled suspension.
According to paragraph 1,
The injection mold body and the yoke are hook coupled,
Characterized in that a sealing member is provided on the upper surface of the injection mold body.
Solenoid valve device for electronically controlled suspension.
According to paragraph 1,
The valve opening and closing means includes a valve body accommodated in the yoke, and a valve head coupled to an upper end of the valve body to open or close a flow path,
Characterized in that a damper is provided on the upper edge and lower surface of the valve body.
Solenoid valve device for electronically controlled suspension.
According to paragraph 1,
The core is formed by bending the lower part into two or more stages,
The bobbin is formed by bending into a shape corresponding to the lower shape of the core.
Solenoid valve device for electronically controlled suspension.
According to paragraph 1,
When the plunger moves upward and comes into contact with the core, the lower part of the core and the upper part of the plunger are formed in a concavo-convex manner.
Solenoid valve device for electronically controlled suspension.
According to claim 1 or 5,
The lower part of the core is formed with a wedge-shaped protrusion protruding downward,
The upper part of the plunger is characterized in that a wedge-shaped groove is formed in a shape corresponding to the shape of the protrusion of the core.
Solenoid valve device for electronically controlled suspension.
delete According to paragraph 1,
An elastic member receiving groove is formed in the center of the lower surface of the yoke,
The elastic member is positioned between the bottom surface of the elastic member receiving groove and the bolt head portion of the second rod member.
Solenoid valve device for electronically controlled suspension.

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