KR101944984B1 - Switchable solenoid valve assembly for air spring for changing drive mode in suspension system - Google Patents

Abstract

The present invention provides a switchable solenoid valve assembly for an air spring for changing a drive mode in a suspension system, in which an internal path that is independent from an external path is provided for mode switching of the fluid to set pressure applied to both sides of a membrane from the fluid in an equilibrium state, so that it is possible to smoothly control the opening and closing of a port by controlling only small-sized operating power applied to a coil of a solenoid, a double protrusion portion of a valve structure and an inner peripheral surface of a partition portion of a separator closely adhere to each other, and a downward displacement of the valve structure is limited through a stopper of the separator. The above-described solenoid valve assembly includes: a separator (400) having a plurality of ports that can communicate with a plurality of independent chambers individually; a valve structure (500) in which a downward displacement of the valve structure (500) is limited by a stopper (432) formed on an inner circumferential surface of a stepped partition (430) between ports of the separator (400) and the valve structure (500) controls fluid movement between chambers flowing through the ports;, a solenoid valve (300) that supplies an operating power to the valve structure (500) and has an internal path for fluid movement, in which the internal path is separated from an external path for fluid movement flowing through the port of the separator (400) to realize an equilibrium state of pressure; and a membrane (600) provided in the solenoid valve (300) to cut off communication between the external path for fluid movement and the internal path.

Description

TECHNICAL FIELD [0001] The present invention relates to a switchable solenoid valve assembly for an air spring for switching a drive mode of a suspension,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchable solenoid valve assembly for an air spring for switching a drive mode of a suspension, and more particularly, to a solenoid valve for controlling opening and closing of a flow path between a plurality of chambers, By establishing the inner path for fluid movement separated from the path and establishing the equilibrium state of the pressure acting on the inner and outer surfaces of the membrane, the control of the small-sized operating power applied to the coil of the solenoid can open and close the port And more particularly to a switchable solenoid valve assembly for an air spring for switching a drive mode of a suspension device capable of normally performing a mode change by preventing a fixed connection of a movable rod to a magnetic core during operation of the solenoid valve .

The present invention also provides a method for switching a drive mode of a suspension device capable of positively closely contacting a double projection portion of a valve structure and an inner peripheral surface of a partition portion of a separator and positively limiting a downward displacement of the valve structure through a stopper of a separator To a switchable solenoid valve assembly for an air spring.

In general, the electronic control suspension system (ECS) applied to automobiles automatically adjusts the height and damping force of the vehicle body based on the driving condition detected by the sensor, the road surface condition, or the mode selection by the driver . In particular, in the case of a pneumatic spring for interrupting the flow to high pressure air, the damping force can be variably controlled by on / off control of the solenoid valve.

For example, Patent Publication No. 10-2010-0022652 discloses a solenoid valve for flow control of a pneumatic spring. In this case, the solenoid valve includes a housing having one side opened, a coil for generating an electromagnetic force when the power is applied, a bracket for covering one side of the housing and having a hollow portion, And the other end of the plunger is provided inside the plunger and protrudes to the outside from the opening side of the housing by forming an inlet through which the high pressure air flows. The other end of the plunger is lifted up and down by the electromagnetic force of the coil, And a valve unit coupled to one end of the plunger to receive high pressure air flowing through an inlet port that is opened by lifting and lowering the elevator unit and discharge the high pressure air to the outlet port.

However, in the conventional solenoid valve which interrupts the flow of the fluid in this way, when the pressure of the fluid is high, a large electromagnetic force is required to control the valve on / off. As a result, a large capacity solenoid valve Or the power consumption for controlling the opening and closing of the valve is unnecessarily increased.

Particularly, in the case of the conventional electronically controlled suspension device, not only the pressure of the air used is high, but also the control of opening and closing of the flow path of the high-pressure fluid is directly related to the stable function and the durability, It is necessary to prevent leakage from the hermetically sealed parts. However, there is a trade-off between the magnitude of the operating pressure and the possibility of leakage.

In addition, in the case of the conventional on / off control type solenoid valve, abnormal noise due to contact of parts is generated in the course of interrupting the flow of fluid, and movable parts such as a plunger are fixed when used for a long time, There is no problem.

The solenoid valve for the electronically controlled suspension of the patent 10-2010-0022652

SUMMARY OF THE INVENTION The present invention provides a solenoid valve assembly capable of selectively switching the operation of the suspension to a normal mode or a sports mode, By providing a fluid movement internal path formed independently of the inside of the solenoid valve so as to set the pressure applied to both sides of the membrane from the enclosed fluid in an equilibrium state so that by controlling only a small size operating power applied to the coil of the solenoid, And the switching of the mode can be normally performed by preventing the movable rod from sticking to the magnetic core during operation of the solenoid valve.

Another problem to be solved by the present invention is to closely contact the double protruding portion of the valve structure and the inner peripheral surface of the partition of the separator so as to more positively limit the downward displacement of the valve structure through the stopper of the separator.

According to an aspect of the present invention, there is provided a semiconductor device comprising: a separator having a plurality of ports capable of individually communicating with a plurality of independent chambers; A valve structure that restricts downward displacement by a stopper formed on an inner circumferential surface of a stepped partition between ports of the separator and regulates fluid movement between chambers through the port; A solenoid valve having an internal passage for fluid movement which provides an actuating force to the valve structure and separates from the external passage for fluid movement through the port of the separator to achieve pressure balance; And a membrane disposed on the solenoid valve to cut off communication between the fluid path and the internal path, wherein the solenoid valve, the valve structure, and the membrane are connected to each other through an external path when opening and closing the port of the separator. The area of the pressure receiving portion and the area of the pressure receiving portion through the internal route are set to be the same.

The present invention further includes a sealing member mounted on the valve structure and having a double protrusion which is in contact with an inner circumferential surface of the partition and whose downward displacement is limited by the stopper, And are spaced apart from each other with a contraction clearance space toward the inner peripheral surface of the partition.

In the present invention, the valve structure includes a mounting rod coupled to the movable rod, and the sealing member is coupled to the mounting rod and contacts the inner circumferential surface of the partition of the port.

In the present invention, the solenoid valve may include: a movable rod movably installed to be coaxially coupled to a throttle valve structure; A magnetic core movably received in the movable rod and coaxial with the separator; A plunger coupled coaxially with the movable rod and axially movable toward the magnetic core; And a bobbin coupled coaxially with the magnetic core and movably receiving the movable rod and the plunger therein.

In the present invention, the movable rod and the plunger each have an axial direction penetration portion for forming an internal path, and the bobbin has, on its inner circumferential surface, an axial protrusion for forming an inner path between the movable rod and the outer circumferential surface of the plunger, Wherein the magnetic core has a bush installed on an inner circumferential surface of the magnetic core in contact with an outer circumferential surface of the movable rod, wherein the magnetic core has an axial groove for forming an inner path between the inner circumferential surface and the outer circumferential surface of the bush, do.

In the present invention, the magnetic core may include an engagement protrusion protruding from the one end of the axial recess to the center so as to confine the bush in the axial direction on the inner circumferential surface, .

In the present invention, the inner path sequentially passes through the axial direction penetration portion of the movable rod, the axial direction penetration portion of the plunger, the axial projection portion of the bobbin, and the axial groove portion of the magnetic core, Is set to reach the inner side.

In the present invention, the separator and the magnetic core each have a seating end for fixing the outer diameter portion of the membrane at mutually opposing positions, and the seating end of the magnetic core has an insertion groove portion formed concavely in the axial direction And a seating end portion of the separator is provided with a protruding end portion extending in the axial direction to be inserted into the insertion groove portion.

In the present invention, the separator has a supporting groove portion formed between the seating end portion and the projecting end portion in an axial direction so as to insert a lower end portion of the outer diameter portion of the membrane, wherein the magnetic core has the seating end portion and the insertion- And the inner circumferential surface position of the seating end of the separator is arranged to be equal to the inner circumferential surface position of the seating end of the magnetic core, The area for the pressure receiving portion between the inner side surface and the outer side surface is set to be the same.

The present invention further includes a ring-shaped annular body for supporting the inner diameter portion of the membrane from below, wherein the movable rod has a flange portion for fixing the inner diameter portion of the membrane at a position facing the annular body from above And the protruding area of the annular body is set to be equal to the protruding area of the flange portion so that the area of the inner side surface and the outer side surface of the membrane is equal to the area of the pressure receiving portion.

In the present invention, the outer circumferential portion of the membrane is provided with an outer protrusion protruding in the vertical direction toward the support groove portion of the magnetic core and the support groove portion of the separator along the front circumferential portion. In the inner circumferential portion of the membrane, And an inner protrusion protruding from the inner receiving groove of the flange of the movable rod and the inner step of the annular body vertically.

In the present invention, the plunger includes a damper installed on an upper surface of the bobbin so as to protrude toward an upper inner surface of the bobbin. The damper is seated in a receiving groove formed on an upper surface of the plunger, At least one portion along the circumference of the bobbin is provided with an incision for establishing an internal path that allows the flow path between the axial penetration of the plunger and the axial protrusion of the bobbin to communicate with each other.

The present invention is characterized in that, in switching the drive mode of the suspension to the normal mode or the sport mode, respectively, the fluid flow path through each port from an independent plurality of chambers is divided into an outer path and an inner path, By setting the load due to the pressure of the fluid applied to the side surface and the pressure exerted on the outer side surface in an equilibrium state, on / off control of the solenoid valve is performed by only a small operating power source, .

The present invention effectively absorbs impact generated at the time of contact via a damper provided between the upper end of the plunger and the upper inner peripheral surface of the bobbin, and minimizes the occurrence of abnormal noise.

The present invention can form an axial protrusion on the inner circumferential surface of the bobbin and serve as an application for reinforcing the structural rigidity of the member in addition to the function of setting an internal path for the movement of the fluid. In order to precisely guide the axial movement of the plunger do.

The present invention can ensure a stable closed state of the flow path through close contact by the double airtight structure formed between the double protruding portion formed in the sealing member of the valve structure and the inner peripheral surface of the partition portion of the separator. Particularly, in the operation of the solenoid valve according to the present invention, since the bottom surface of the sealing member of the valve structure is restricted by the stopper formed on the inner peripheral surface of the partition of the separator, the abnormal noise can be prevented from occurring .

According to the present invention, it is possible to prevent sticking of the movable rod via a bush provided on the inner circumferential surface of the magnetic core when the solenoid valve is operated, thereby ensuring smooth durability.

The present invention can maintain a more tight state with respect to the inclined surface and the inner circumferential surface of the partition through elastic protrusions provided on the sealing member when the port of the separator is closed by the valve structure during operation of the solenoid valve.

FIG. 1 is a perspective view illustrating an outer appearance of a switchable solenoid valve assembly for an air spring for switching a drive mode of a suspension according to an embodiment of the present invention. FIG.
2 is a longitudinal sectional view showing an internal configuration of a switchable solenoid valve assembly for an air spring for switching the drive mode of the suspension shown in FIG.
3 is an exploded perspective view showing a case and an injection body separated from a switchable solenoid valve assembly for an air spring for switching the drive mode of the suspension shown in FIG.
FIG. 4 is a perspective view of a switchable solenoid valve assembly for an air spring for switching a drive mode of a suspension according to an exemplary embodiment of the present invention. Fig. 5 is a perspective view showing the state of engagement of the separator.
FIG. 5 is an exploded perspective view of the solenoid valve shown in FIG. 4, illustrating the coupling relationship between the solenoid valve and the separator.
6 is an enlarged perspective view of main components shown in Fig.
FIG. 7 is an exploded perspective view showing the solenoid valve and separator shown in FIG.
8 is an enlarged perspective view of main components shown in Fig.
9 is a partially enlarged cross-sectional view illustrating an open state between a valve structure and a separator when a coil is not magnetized in a switchable solenoid valve assembly for an air spring for switching a drive mode of a suspension according to an embodiment of the present invention.

The accompanying drawings in the present invention may be exaggerated for clarity, clarity, and descriptive convenience. In addition, since the following terms are defined in consideration of the functions of the present invention, they may vary depending on the intention or custom of the user or the operator, and therefore the definition of these terms should be based on the technical contents throughout this specification will be. On the contrary, the embodiments are merely illustrative of the constituent elements set forth in the claims of the present invention and do not limit the scope of the present invention, and the scope of the rights should be interpreted on the basis of technical ideas throughout the specification of the present invention .

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

Referring to the drawings, the present invention is a solenoid valve assembly that is on / off-controlled for switching modes in a suspension device, including a case 100 mounted on a suspension, A solenoid valve 300 accommodated in the injection body 200 and magnetized when the solenoid valve 300 is energized, a plurality of chambers coupled to the solenoid valve 300, A separator 400 having a function of limiting the downward displacement of the valve together with the solenoid valve 300 and a solenoid valve 300 for controlling opening and closing of the port of the separator 400 to permit movement of the fluid through the flow path, And the function mode of the suspension device is switched differently, such as the normal mode or the sports mode, so that the lower limit of the downward displacement is limited by the separator (400) (500).

The case 100 is a hollow cylindrical member having an upper / lower opening, and is configured to receive the solenoid valve 300 therein. 2, the case 100 mounts the magnetic core 320 of the solenoid valve 300 inside the lower end portion thereof. At this time, an O-ring is provided between the inner circumferential surface of the lower end of the case 100 and the outer circumferential surface of the magnetic core 320 of the solenoid valve 300, thereby forming an airtight structure that can be isolated from the outside.

The injection body 200 is formed by injection molding, and the injector body 200 can be inserted into the case 100 while the solenoid valve 300 is embedded therein. In this case, a ring-shaped shock absorber 210 is separately provided between the upper inner circumferential surface of the case 100 and the upper outer circumferential surface of the injection body 200 so as to alleviate the shock generated therebetween do.

The solenoid valve 300 provides a downward actuation force toward the separator 400 with respect to the valve structure 500 during energization and provides an actuation force toward the separator 400 through the port of the separator 400, An external path for fluid movement, and a fluid movement internal path formed in the internal space of the solenoid for separating from the external path and implementing pressure balance. That is, in the solenoid valve 300, the external path is provided for communication between a plurality of chambers for switching the drive mode of the suspension device, and the internal path includes a solenoid valve assembly for turning on and off the solenoid valve assembly, The opening and closing of the port can be smoothly performed only by controlling the operation power of small size.

In addition, the solenoid valve 300 has a membrane 600 in the form of a diaphragm structure of a flexible material to cut off the communication between the fluid-moving outer path and the fluid-moving inner path. In this case, the switchable solenoid valve assembly for an air spring for switching the drive mode of the suspension according to the present invention, when opening and closing a port formed in the separator 400 according to the operation of the valve structure 500, Including the outer surface of the valve structure 500 including the outer surface of the membrane 600 under pressure through the inner path and the inner surface of the membrane 600 under pressure through the inner path, Are set equal to each other.

That is, the solenoid valve 300, the valve structure 500, and the membrane 600 are arranged in parallel to each other in such a manner that the area of the pressure receiving portion, which is subjected to pressure through the external path when the port of the separator 400 is opened and closed, Are equal to each other. Accordingly, the solenoid valve assembly according to the present invention can open or close the port formed in the separator 400 by only a small operating power applied to the coil 360 of the solenoid valve 300.

2 to 9, the detailed configuration of the solenoid valve 300 will be described below.

The solenoid valve 300 includes a hollow movable rod 310 mounted coaxially with the valve structure 500 inside the case 100 to be movable up and down axially, A hollow magnetic core 320 that is movably received in the inside of the case 100 and is coaxially coupled to the upper portion of the separator 400 and fixed to a lower inner circumferential surface of the case 100, A hollow plunger 330 coaxially coupled to the magnetic core 320 and installed to be movable in the axial direction toward the magnetic core 320, a magnetic core 320 disposed between the upper end of the magnetic core 320 and the lower end of the plunger 330, A return spring 340 provided coaxially outside of the magnetic core 320 and provided with a movable spring 310 and a plunger 330 therein, The bobbin 350 is wound around the bobbin 350 and generates a magnetic force in response to application of a power source to generate a movement force of the plunger 330 toward the magnetic core 320 A coil 360 is provided between the upper outer peripheral surface of the plunger 330 and the upper inner peripheral surface of the bobbin 350 to prevent contact with the bobbin 350 when the plunger 330 is restored and moved, And a terminal 380 electrically connected to an external power source for supplying operating power to the coil 360. The buffer spring 370 includes a buffer spring 370,

The movable rod 310 has a fluid-passing axial through-hole 312, which is elongated along the axial direction of the member for forming an internal path. In this case, the axial penetration portion 312 is preferably formed at the center of the axis of the movable rod 310, but is not limited thereto.

The movable rod 310 has a flange portion 314 protruding outward horizontally along the radial direction over the entire circumference of the outer circumferential surface to fix the inner diameter portion of the membrane 600 at the upper portion. In this case, the flange portion 314 functions to support the inner diameter portion of the membrane 600 and to set the same area for the pressure receiving portion between the inner side surface and the outer side surface of the membrane 600 . To this end, the projected area of the flange 314 is set to the same as the projected area of the annular body 460 described later, so that the state of the pressure balance with respect to the inner and outer surfaces of the membrane 600 .

The flange portion 314 of the movable rod 310 is provided with an inner receiving groove portion 316 which is recessed to prevent the inner diameter portion of the membrane 600 from being separated from the upper end portion along the entire circumference of the radially inward portion .

The magnetic core 320 is provided with a bush 390 on the inner circumferential surface of the through hole formed at the center to reduce a resistance generated when the movable core 310 contacts the outer circumferential surface of the movable rod 310. Particularly, the magnetic core 320 is provided with an axial direction recessed portion 322 which is formed to be long along the axial direction of the member for forming an internal path between the inner circumferential surface of the through hole and the outer peripheral surface of the bush 390 . In this case, the axial recessed grooves 322 are formed in a large number of quantities at appropriate intervals over the entire inner peripheral surface of the magnetic core 320.

The magnetic core 320 has an engagement protrusion 324 protruding from one end of the axial direction recessed portion 322 toward the center to constrain the bush 390 in the axial direction on the inner peripheral surface of the through hole Respectively. In this case, the axial direction recessed portion 322 formed on the inner circumferential surface of the magnetic core 320 is configured to cut the engagement protrusion 324, thereby restricting the movement of the bush 390, So that it is possible to secure a stable internal path.

The magnetic core 320 has a seating end portion 326 that contacts the upper surface of the outer diameter portion of the membrane 600 over the entire circumference of the bottom surface portion. In this case, the seating end 326 tightly fixes the entire circumference of the outer diameter portion through contact with the outer diameter portion of the membrane 600. The magnetic core 320 is formed on the outer side of the seating end 326 to receive the protruding end portion 442 formed on the outer circumferential portion of the separator 400, An insertion groove portion 326a is also provided.

The magnetic core 320 includes a support groove portion 328 which is recessed axially between the seating end portion 326 and the insertion groove portion 326a and inserts and supports the upper end portion of the outer diameter portion of the membrane 600 Respectively.

The plunger 330 is a form capable of mutual communication with the axial direction through portion 312 of the movable rod 310 for forming an internal path and includes a fluid movement axial direction penetrating portion 332). In this case, the axial penetration portion 332 is preferably formed at the axial center of the plunger 330, but is not limited thereto.

The plunger 330 is mounted on the upper surface of the bobbin 350 so as to protrude toward the inner surface of the upper portion of the bobbin 350 and has a ring-shaped damper 336 for buffering collision with the upper inner circumferential surface of the bobbin 350 Respectively. Accordingly, when the solenoid valve 300 is switched from the ON state to the OFF state, the damper 336 is in contact with the upper end of the plunger 330 and the upper inner peripheral surface of the bobbin 350, The occurrence of abnormal noise due to the contact can be minimized.

In this case, the damper 336 is inserted and seated in an accommodating groove 334 recessed on the upper surface of the plunger 330, and the damper 336 is provided on at least one portion A cutout 338 that allows the flow path between the axial through portion 332 of the plunger 330 and the axial protrusion 352 of the bobbin 350 to communicate with each other to secure an internal path for fluid movement, .

The return spring 340 is installed between the upper end of the through hole of the magnetic core 320 and the lower end of the through hole of the plunger 330 so that both ends of the return spring 340 are supported. Thereby providing a restoring force for upward movement with respect to the lancer 330. In this case, the upper end of the return spring 340 is supported at a stepped portion formed on the inner circumferential surface of the axial direction penetrating portion 332 of the plunger 330, and the lower end is supported by the inner circumferential surface of the through- As shown in Fig.

The bobbin 350 has an inner circumferential surface protruding outwardly from the outer circumferential surface of the plunger 330 to form an inner path, and has a fluid-moving axial protrusion 352 formed along the axial direction . In this case, the axial protrusions 352 are formed in a large number of spaces at appropriate intervals over the entire inner circumferential surface of the bobbin 350, thereby enhancing the structural rigidity of the member in addition to the function of forming the inner path, It is possible to guide the precise position of the plunger 330 when the plunger 330 moves in the axial direction according to the magnetization of the coil 360. The axial protrusion 352 provided for forming an internal path between the inner circumferential surface of the bobbin 350 and the outer circumferential surface of the plunger 330 may be formed on the outer circumferential surface of the plunger 330, It may be formed in the form of a recess which is formed concavely in the thickness direction of the material rather than the shape of the projection.

The coil 360 is wound around the outer circumferential surface of the bobbin 350 and is magnetized by an operating power source provided through the terminal 380 to generate a magnetic force to move the plunger toward the magnetic core 320 330, respectively.

The buffer spring 370 is provided between the upper outer circumferential surface of the plunger 330 and the upper inner circumferential surface of the bobbin 350 to prevent the plunger 330 from coming into contact with the bobbin 350 when restoring the plunger 330, And the like. In this case, the lower end of the buffer spring 370 is fitted to be supported by the inner peripheral surface of the damper 336. That is, since the lower end of the buffer spring 370 is fitted to the inner circumferential surface of the damper 336, accurate positioning of the buffer spring 370 can be obtained during assembly.

The terminal 380 is installed to be electrically connected to the coil 360 from above the bobbin 350. Particularly, the terminal 380 is disposed to be exposed to the outside through the upper opening of the case 100 while being accommodated in the upper structure of the injection body 200.

The bush 390 is installed in the axial direction penetration portion 312 of the magnetic core 320 and is installed to be able to contact the outer circumferential surface of the movable rod 310. In this case, the upper end of the bush 390 is supported by the engaging jaw 324 of the magnetic core 320 so that the axial displacement of the movable rod 310 can be suppressed.

That is, in the switchable solenoid valve assembly for an air spring for switching the drive mode of the suspension according to the present invention, the inner path for fluid movement is formed by the axial penetration portion 312 of the movable rod 310 and the plunger 330 The axial direction protrusion portion 352 of the bobbin 350 and the axial direction recessed portion 322 of the magnetic core 320 to the inside of the membrane 600 in order, Is set to reach the side surface. Particularly, an inner path for fluid movement formed between the outer circumferential surface of the movable rod 310 and the inner circumferential surface of the magnetic core 320 is formed by the axial grooves 322 of the magnetic core 320 and the outer circumferential surface of the bush 390 As shown in FIG.

The separator 400 has an air flow port communicable with a plurality of chambers (not shown) provided in the suspension device and is connected to the bottom surface of the magnetic core 320 of the solenoid valve 300 And a hollow structure configured to be coupled.

That is, the separator 400 includes a first port 410 disposed transversely with respect to the member, a second port 420 longitudinally disposed to intersect the first port 410, And a partition 430 formed in a stepped shape along the entire circumference between the first port 410 and the second port 420 to be in contact with the sealing member 520 of the valve structure 500. In this case, the first port 410 and the second port 420 are respectively formed in a separate structure by a separate shielding structure (not shown) provided on the outer side of the separator 400, Is limited to the internal passage via the valve structure 500 to permit free flow of the fluid enclosed within the chamber.

In addition, the first port 410 communicates with one of the plurality of chambers of the suspension, and is formed in a plurality of radially spaced apart from the center of the member. The second port 420 communicates with the other chamber of the plurality of chambers of the suspension device and is connected to the movable rod via the through hole of the mounting rod 510 constituting the valve structure 500 310 and the axial direction penetrating portion 332 of the plunger 330 in order to communicate with the inner path sequentially passing through the axial direction penetrating portion 312 of the plunger 330 and the axial direction penetrating portion 332 of the plunger 330. [

The partition 430 has a stopper 432 protruding in a stepped shape toward the central portion of the second port 420 to restrict the downward displacement of the valve structure 500 on the inner circumferential surface. In this case, the stopper 432 restricts downward displacement of the valve member 500 moving downward during magnetization of the solenoid relative to the sealing member 520, thereby more effectively preventing abnormal noise from occurring .

The separator 400 is disposed at a position opposite to the seating end 326 of the magnetic core 320 over the entire circumference of the upper outer circumferential surface of the separator 400, And an end portion 440. In this case, the inner peripheral surface position of the seating end 440 of the separator 400 is the same as the inner peripheral surface position of the seating end 326 of the magnetic core 320, The same as the area of the pressure receiving portion.

The seating end portion 440 of the separator 400 has a protruding end portion 442 extending axially along the front circumference so as to be inserted into the inside of the insertion groove portion 326a of the magnetic core 320 . That is, the coupling between the separator 400 and the magnetic core 320 is performed by inserting the protruding end 442 into the inside of the insertion groove 326a. The outer diameter portion of the membrane 600 is supported between the upper and lower outer circumferential surfaces of the magnetic core 320 and the seating end portion 440 of the separator 400, .

The separator 400 includes a support groove 450 formed between the seating end 440 and the protruding end 442 so as to be axially concave and to insert and support the lower end of the outer diameter of the membrane 600 Respectively.

The separator 400 further includes a ring-shaped annular body 460 for supporting the inner diameter portion of the membrane 600 from below. In this case, the annular body 460 is inserted into the outer peripheral surface of the bottom surface of the movable rod 310 with the inner diameter portion of the membrane 600 interposed therebetween at the lower portion of the flange portion 314 of the movable rod 310 And supports the inner diameter portion of the membrane 600 from below. Particularly, the annular body 460 has an inner stepped portion 462 which is axially recessed in the axial direction about the central through hole, and the inner stepped portion 462 has a stepped portion And the lower end portion of the inner diameter portion is inserted and supported. The protruding area of the annular member 460 is set to be the same as the protruding area of the flange 314 of the movable rod 310 so that the state of the pressure balance with respect to the inner and outer surfaces of the membrane 600 Respectively.

The valve structure 500 includes a mounting rod 510 coupled to the outer circumferential surface of the lower end of the movable rod 310 and a sealing member 510 tightly coupled to the partition rod 430 of the separator 400, And a sealing member 520 made of a flexible material to be brought into contact therewith. In this case, the mounting rod 510 is formed at the center with a hollow structure that forms an opening 512 in the form of a through hole to closely receive the lower end of the movable rod 310.

Particularly, the mounting rod 510 has a flange portion 514 which protrudes outward horizontally along the radial direction over the entire circumference of the outer circumferential surface to fix the sealing member 520, and the flange portion 514 A plurality of through holes 514a are formed over the entire circumference for insert injection with the sealing member 520. [

The sealing member 520 is a hollow structure to be coupled to the flange 514 of the mounting rod 510. The sealing member 520 is a hollow structure having a front peripheral portion of the outer peripheral surface facing the inner peripheral surface of the partition portion 430 of the separator 400 And a double protruding portion 530 for hermetic sealing to completely block the traffic between the ports.

The dual protrusions 530 protrude outward toward the inner circumferential surface of the partition 430 of the separator 400. The double protrusions 530 protrude outward toward the inner circumferential surface of the partition 430, And they are spaced apart from each other with the contraction clearance space in the vertical direction at the front perimeter. Also, the double protruding portion 530 is configured to be restricted in downward displacement through contact with the stopper 432. That is, when the double protruding portion 530 is inserted into the inner circumferential surface of the partition 430, the double protruding portion 530 contacts the stopper 432 to restrict the downward displacement, and at the same time, The communication between the first port 410 and the second port 420 can be blocked more tightly as a double airtight structure. In addition, if the double protruding portion 530 can have a contraction clearance space on the outer circumferential surface of the sealing member 520, the protruding portion may have a multiple structure instead of a dual structure.

The membrane 600 includes an outer protrusion 610 protruding in the vertical direction toward the support groove portion 328 of the magnetic core 320 and the support groove portion 450 of the separator 400 along the front- The upper end of the outer protrusion 610 is inserted into and supported by the support recess 328 formed in the magnetic core 320 and the lower end of the outer protrusion 610 is supported by the separator 400. [ So that it is possible to more positively suppress the deviation from the outside. In this case, it is a matter of course that the position of the support groove portion 328 is set to be the same as the position of the support groove portion 450.

The membrane 600 has an inner side groove portion 316 of the flange portion 314 of the movable rod 310 and an inner side step portion 462 of the annular body 460 along the entire circumference portion of the inner diameter portion The upper end of the inner protrusion 620 is formed in the inner side of the flange portion 314 of the movable rod 310 so as to be recessed along the entire circumference of the flange portion 314 of the movable rod 310. The inner protrusion 620, And the lower end of the inner protrusion 620 is inserted into and supported by the inner stepped portion 462 of the annular body 460 to be more positively restrained from being separated from the outside . In this case, it is needless to say that the position of the inner receiving groove 316 is set to be the same as the position of the inner stepped portion 462.

Therefore, the present invention configured as described above divides the flow path of the fluid through each port from the plurality of independent chambers into the external path and the internal path in switching the drive mode of the suspension to the normal mode or the sports mode, The load applied to the inner side surface and the outer side surface of the membrane 600 can be set in an equilibrium state. Therefore, the on / off state of the small-sized operation power applied to the coil 360 of the solenoid valve 300 can be reduced, The opening and closing of the port can be smoothly switched even if only the OFF control is performed.

The present invention is also applicable to a case where the upper end of the plunger 330 and the upper inner circumferential surface of the bobbin 350 come into contact with each other through a ring-shaped damper 336 installed between the plunger 330 and the bobbin 350 It is possible to effectively absorb the impact, thereby minimizing the occurrence of abnormal noise.

In addition, in the present invention, the axial protrusion 352 formed on the inner circumferential surface of the bobbin 350 not only functions to set the internal path for fluid movement, but also reinforces the structural rigidity of the member, The double protruding portion 530 formed on the sealing member 520 of the valve structure 500 and the inner peripheral surface of the partition portion 430 of the separator 400 can be closely contacted with each other, Thereby ensuring a stable closed state of the flow path.

That is, in switching the port of the separator 400 to the closed state by the valve structure 500 during the operation of the solenoid valve 300, the sealing member 520 may be divided into two, The airtightness of the double airtight structure can be maintained with respect to the inner peripheral surface of the portion 430 so that the suspension can be correctly operated in the sport mode.

In particular, when the solenoid valve 300 is operated, the bottom surface of the sealing member 520 of the valve structure 500 contacts the stopper 432 formed on the inner circumferential surface of the partition 430 of the separator 400, Since the downward displacement of the structure 500 can be restricted, the occurrence of abnormal noise can be more positively prevented.

In addition, since the movable rod 310 can be prevented from being fixed by the bush 390 provided on the inner peripheral surface of the magnetic core 320 when the solenoid valve 300 is operated, do.

The description above is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but are intended to illustrate and not limit the scope of the technical spirit of the present invention. Therefore, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of the same should be interpreted as being included in the scope of the present invention.

100-case
200-Injection body 210 - Buffer member
300-solenoid valve
310-movable rod 312-axial through-
314-flange portion 316-inner receiving groove
320-Magnetic Core 322-Axial Yaw Groove
324-stop jaw 326-seat end
326a-Insert Groove 328-Support Groove
330-plunger 332-axial through-
334-receiving groove 336-damper
338-
340-return spring 350-bobbin
352-axial protrusion 360-coil
370 - buffer spring 380 - terminal
390-Bush
400-separator
410 - first port 420 - second port
430-Compartment 432-Stopper
440-seating end 442-
450-Support Groove 460-
500-valve structure
510-mounting rod 512-opening
520-sealing member 530-double-
600 - Membrane 610 - Outer protrusion
620- inner protrusion

Claims (14)

A separator having a plurality of ports communicable with a plurality of independent chambers;
A valve structure that restricts downward displacement by a stopper formed on an inner circumferential surface of a stepped partition between ports of the separator and regulates fluid movement between chambers through the port;
A solenoid valve having an internal passage for fluid movement which provides an actuating force to the valve structure and separates from the external passage for fluid movement through the port of the separator to achieve pressure balance;
A membrane disposed in the solenoid valve to cut off communication between the fluid path and the inner path; And
And a sealing member mounted on the valve structure and having a double protrusion contacting the inner circumferential surface of the partition and being restricted in downward displacement by the stopper,
Wherein the solenoid valve, the valve structure, and the membrane are configured such that the area of the pressure receiving portion through the external path and the area of the pressure receiving portion through the internal path are set to be the same when the port of the separator is opened and closed. Switchable solenoid valve assembly for air springs for mode switching.
delete The method according to claim 1,
Wherein the dual protrusions are spaced apart from each other at a front peripheral portion of the outer circumferential surface of the sealing member toward an inner circumferential surface of the partition portion with a contraction clearance space.
The method according to claim 1,
Wherein the valve structure has a mounting rod coupled to a movable rod of the solenoid valve and the sealing member is coupled to the mounting rod and contacts the inner circumferential surface of the compartment of the port. Switchable solenoid valve assembly for air springs.
The method according to claim 1,
The solenoid valve includes:
A movable rod movably installed to be coaxially coupled to the shim valve structure;
A magnetic core movably received in the movable rod and coaxial with the separator;
A plunger coupled coaxially with the movable rod and axially movable toward the magnetic core; And
And a bobbin coupled coaxially with the magnetic core and movably receiving the movable rod and the plunger therein. 2. The switchable solenoid valve assembly of claim 1,
The method of claim 5,
Wherein the movable rod and the plunger each have an axial direction penetrating portion for forming an inner path, and the bobbin has an axial protrusion for forming an inner path between the inner circumferential surface and the outer circumferential surface of the plunger, Wherein the magnetic core includes a bush installed on an inner circumferential surface thereof so as to be in contact with an outer circumferential surface of the movable rod, wherein the magnetic core has an axial groove for forming an inner path between the inner circumferential surface and the outer circumferential surface of the bush, A switchable solenoid valve assembly for an air spring for switching the drive mode of the suspension.
The method of claim 6,
Wherein the magnetic core has a locking protrusion protruding from the one end of the axial recess to the center so as to confine the bush in the axial direction on the inner circumferential surface thereof and the axial recess of the magnetic core is formed by cutting the locking protrusion Wherein the solenoid valve assembly is a solenoid valve assembly for an air spring for switching the drive mode of a suspension.
The method of claim 6,
The inner path is formed by sequentially passing through the axial direction penetration portion of the movable rod, the axial direction penetration portion of the plunger, the axial projection portion of the bobbin, and the axial groove portion of the magnetic core to reach the inner surface of the membrane Wherein the solenoid valve assembly is configured such that the solenoid valve assembly is operable to change the drive mode of the suspension.
The method of claim 5,
Wherein the separator and the magnetic core each have a seating end for fixing the outer diameter portion of the membrane at mutually opposing positions, the seating end of the magnetic core is provided with an insertion recess portion formed concavely in the axial direction, And a protruding end portion extending in the axial direction so as to be inserted into the insertion groove portion is provided at the seating end portion of the solenoid valve assembly.
The method of claim 9,
Wherein the separator has a support groove portion formed between the seating end portion and the projecting end portion in an axial direction so as to insert a lower end portion of the outer diameter portion of the membrane and the magnetic core is disposed axially between the seating end portion and the insertion groove portion The inner circumferential surface position of the seating end of the separator being the same as the inner circumferential surface position of the seating end of the magnetic core so that the inner surface of the membrane and the outer surface of the membrane, Wherein the area for the pressure receiving portion between the valve and the pressure receiving portion is set to be the same for the drive mode of the suspension.
The method of claim 5,
And a ring-shaped annular body for supporting the inner diameter portion of the membrane at the lower portion, wherein the movable rod is provided with a flange portion for fixing the inner diameter portion of the membrane at a position opposed to the annular body, Wherein the protruding area of the annular body is set to be the same as the protruding area of the flange portion so that an area of the pressure receiving portion between the inner side surface and the outer side surface of the membrane is the same. For solenoid valve assembly.
The method of claim 11,
The outer periphery of the membrane is provided with an outer protrusion protruding in the vertical direction toward the support groove of the magnetic core and the support groove of the separator along the entire circumference of the outer periphery of the membrane, And an inner protruding portion protruding in the vertical direction toward the inner stepped portion of the annular body and the inner receiving groove portion of the flange portion of the rod.
The method of claim 5,
Wherein the plunger includes a damper installed on an upper surface of the plunger so as to protrude toward the upper inner surface of the bobbin.
14. The method of claim 13,
Wherein the damper is seated in a receiving groove formed in an upper surface of the plunger, and the damper is provided with at least one portion along the entire circumference thereof with a flow path between the axial penetration portion of the plunger and the axial projection portion of the bobbin, And a cutout is provided for setting an internal path for allowing the user to communicate with the driver. The switchable switchable solenoid valve assembly for an air spring for switching the drive mode of the suspension.

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