KR102386300B1 - Body valve assembly of internal variable damper for vehicle - Google Patents

Abstract

According to the present invention, a separator tube disposed between a base shell and an inner tube to form a reservoir chamber between an outer circumferential surface of the inner tube, and a piston rod reciprocating between the inner tube and the upper and lower portions of the inner tube, respectively, are tension chambers. and a damper unit comprising a piston valve partitioning into the compression chamber; and a first suction flow path disposed under the inner tube, the separator tube, and the base shell to allow the working fluid to flow into the compression chamber during a tension stroke, and from the outside of the separator tube during a compression stroke and a prevention unit for preventing lag from occurring due to negative pressure applied to the tension chamber when the compression stroke is converted to the tension stroke by opening a second suction flow path connected to the tension chamber through the reservoir chamber It relates to a body valve assembly of a vehicle built-in variable damper, characterized in that.

Description

BODY VALVE ASSEMBLY OF INTERNAL VARIABLE DAMPER FOR VEHICLE

The present invention relates to a body valve assembly for a built-in variable damper for a vehicle, and more particularly, to a body valve assembly for a built-in variable damper for a vehicle capable of improving riding comfort by preventing a lag phenomenon of a tension chamber during a compression stroke will be.

A built-in variable valve generally includes a base shell 11, an inner tube 12 built into the base shell 11, and a rod closing the upper end of the base shell 11 and the inner tube 12 as shown in FIG. The guide 17, the piston rod 14 guided by the rod guide 17 to reciprocate inside the inner tube 12, and the piston rod 14 mounted on the piston rod 14 to separate the upper and lower portions of the inner tube 12, respectively. It comprises a piston valve (15) dividing it into a tension chamber (18) and a compression chamber (19).

Here, the body valve 50 is mounted on the lower end of the inner tube 12 , and the check valve 21 is provided on the body valve 50 .

In this case, the built-in variable valve generates a tensile damping force and a compressive damping force, respectively, during a tensile stroke and a compression stroke in the piston valve 15 .

When the compression damping force increases, the flow of the working fluid from the compression chamber 19 to the tension chamber 18 during the compression stroke, that is, the flow of the working fluid through the compression flow path 16 of the piston valve 15 is restricted. A negative pressure is generated in the tension chamber 18 .

Therefore, when the compression stroke is transferred to the tensile stroke, a lag phenomenon occurs in which a damping force is not generated in a certain stroke section due to the above-described negative pressure.

Japanese Laid-Open Patent Application Laid-Open No. 10-96441 US published patent US2008/0251331

The present invention was invented to improve the above problems, and to provide a body valve assembly for a built-in variable damper for a vehicle capable of improving riding comfort by preventing a lag phenomenon of a tension chamber during a compression stroke.

In order to achieve the above object, the present invention provides a separator for forming a reservoir chamber between a base shell, an inner tube built into the base shell, and an outer circumferential surface of the inner tube disposed between the base shell and the inner tube. A damper comprising a tube, a piston rod reciprocating the inner tube, and a piston valve mounted on the piston rod to interlock with the piston rod to reciprocate and partition upper and lower portions of the inner tube into a tension chamber and a compression chamber, respectively. unit; and a first suction flow path disposed under the inner tube, the separator tube, and the base shell to allow the working fluid to flow into the compression chamber during a tension stroke, and from the outside of the separator tube during a compression stroke and a prevention unit for preventing lag from occurring due to negative pressure applied to the tension chamber when the compression stroke is converted to the tension stroke by opening a second suction flow path connected to the tension chamber through the reservoir chamber It is possible to provide a body valve assembly of a vehicle built-in variable damper, characterized in that.

Here, the prevention unit, characterized in that the opening of the first suction flow path to flow from the reservoir chamber to the compression chamber by a working fluid corresponding to the volume of the piston rod during the tension stroke.

When the flow rate of the working fluid flowing into the tension chamber through the piston valve during the compression stroke is insufficient and the tension chamber becomes negative pressure, the prevention unit may It is characterized in that the lag due to the negative pressure applied to the tension chamber when the compression stroke is converted to the tension stroke is prevented from occurring while replenishing the insufficient flow rate of the working fluid by opening the second suction passage toward the .

The body valve assembly of the in-vehicle variable damper is installed at a lower end of the inner tube and a lower end of the separator tube, is disposed under the base shell, and forms the first suction flow path during a tension stroke, and a compression stroke It further includes a body valve assembly that forms the second suction flow path, wherein the prevention unit is provided in each of the body valve assembly.

The body valve assembly includes a first body valve installed at the lower end of the inner tube to close the lower end of the separator tube, and communicating the outside of the separator tube with the compression chamber during a tensile stroke; A second coupled to the bottom surface of the body valve, disposed at the lower end of the base shell, and communicating the tension chamber through the reservoir chamber and the communication hole through the first body valve and the outside of the separator tube during a compression stroke and a body valve, wherein the prevention unit is provided in each of the first body valve and the second body valve.

In addition, the prevention unit is disposed above the first body valve, blocks the flow of the working fluid from the outside of the separator tube toward the compression chamber during the compression stroke, and the outside of the separator tube during the tension stroke a first check valve for allowing the flow of the working fluid to flow from the to the compression chamber to form the first suction flow path, and disposed above the second body valve, from the outside of the separator tube during the tension stroke and a second check valve that blocks the flow of the working fluid toward the chamber and forms the second suction flow path by allowing the flow of the working fluid from the outside of the separator tube to the reservoir chamber during the compression stroke. do it with

According to the present invention having the above configuration, a separate flow path capable of supplementing the insufficient flow rate of the working fluid during the compression stroke is formed in the body valve assembly provided with the prevention unit, and an opening/closing means for allowing or blocking the flow of the working fluid By providing the prevention unit as the , it is possible to improve the riding comfort by preventing the lag phenomenon of the tension chamber during the compression stroke.

1 is a cross-sectional conceptual view schematically showing the overall configuration of a body valve assembly of a built-in variable damper for a vehicle according to an embodiment of the present invention;
2 is a cross-sectional conceptual view schematically illustrating a flow state of a working fluid during a tension stroke of a body valve assembly of a built-in variable damper for a vehicle according to an embodiment of the present invention;
3 is a cross-sectional conceptual view schematically illustrating a flow state of a working fluid during a compression stroke of a body valve assembly of a built-in variable damper for a vehicle according to an embodiment of the present invention;
4 is a cross-sectional conceptual view illustrating the overall structure of a body valve assembly of a built-in variable damper for a vehicle according to an embodiment of the present invention;
5 is a cross-sectional conceptual view schematically illustrating a flow state of a working fluid during a compression stroke of a conventional built-in variable damper for a vehicle;

Advantages and features of the present invention, and a method of achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms.

In the present specification, the present embodiment is provided to complete the disclosure of the present invention, and to fully inform those of ordinary skill in the art to which the present invention pertains to the scope of the invention.

And the invention is only defined by the scope of the claims.

Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques have not been specifically described to avoid obscuring the present invention.

In addition, like reference numerals refer to like elements throughout the specification, and terms used (referred to) in this specification are for the purpose of describing the embodiments and are not intended to limit the present invention.

In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase, and elements and operations referred to as 'comprising (or having)' do not exclude the presence or addition of one or more other elements and operations. .

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs.

In addition, terms defined in a commonly used dictionary are not ideally or excessively interpreted unless they are defined.

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

First, FIG. 1 is a cross-sectional conceptual view schematically showing the overall configuration of a body valve assembly of a built-in variable damper for a vehicle according to an embodiment of the present invention.

And, FIG. 2 is a cross-sectional conceptual view schematically illustrating a flow state of a working fluid during a tension stroke of a body valve assembly of a built-in variable damper for a vehicle according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention It is a cross-sectional conceptual view schematically showing the flow state of the working fluid during the compression stroke of the body valve assembly of the built-in variable damper for a vehicle.

4 is a cross-sectional conceptual view showing the overall structure of the body valve assembly of the built-in variable damper for a vehicle according to an embodiment of the present invention.

It can be understood that the present invention has a structure including the damper unit 100 and the prevention unit 200 as shown.

The damper unit 100 is disposed between the base shell 110 , the inner tube 120 built into the base shell 110 , and the base shell 110 and the inner tube 120 , and the outer peripheral surface of the inner tube 120 . A separator tube 130 forming a reservoir chamber 125 therebetween and a piston rod 140 reciprocating the inner tube 120 are included.

In addition, the damper unit 100 is mounted on the piston rod 140 to interlock with the piston rod 140 to reciprocate and divide the upper and lower portions of the inner tube 120 into a tension chamber 161 and a compression chamber 162 , respectively. It will include a piston valve 150 that is.

The prevention unit 200 is disposed below the inner tube 120 , the separator tube, and the base shell 110 , and when the compression stroke is converted to the tension stroke, lag is generated due to negative pressure applied to the tension chamber 161 . is to prevent

That is, the prevention unit 200 opens the first suction flow path 201 allowing the flow of the working fluid to the compression chamber 162 during the tension stroke as shown in FIG. 2 , and the separator tube 130 during the compression stroke as shown in FIG. 3 . ) by opening the second suction flow path 202 connected to the tension chamber 161 through the reservoir chamber 125 from the outside of the rack due to the negative pressure applied to the tension chamber 161 when the compression stroke is converted to the tension stroke. (lag) can be prevented from occurring.

It goes without saying that the present invention can be applied to the above-described embodiments, and can also be applied to the following various embodiments.

First, the upper end of the inner tube 120 and the base shell 110 is sealed with a closing assembly 170, which, referring to FIG. 4, is a rod guide ( 171 , and an oil seal 172 for preventing leakage of the working fluid according to the reciprocation of the piston rod 140 .

In addition, the present invention further includes a communication hole 300 penetrating through the inner tube 120 to communicate the reservoir chamber 125 and the tension chamber 161 with each other to form the second suction passage 202 described above. It is preferable to do

Meanwhile, according to the present invention, the lower end of the inner tube 120 and the lower end of the separator tube 130 are installed under the base shell 110 to form the first suction flow path 201 during the tensile stroke, and the compression stroke It may further include a body valve assembly 500 forming the second suction passage 202 at the time.

Here, it can be seen that the prevention units 200 to be described later are respectively provided in the body valve assembly 500 .

At this time, the body valve assembly 500 has a structure including a first body valve 510 and a second body valve 520 so that the first and second suction passages 201 and 202 can be clearly separated and formed. can figure out

The first body valve 510 is installed at the lower end of the inner tube 120 to close the lower end of the separator tube 130 and communicates with the outside of the separator tube 130 and the compression chamber 162 during a tensile stroke. .

The second body valve 520 is coupled to the bottom surface of the first body valve 510 and disposed at the lower end of the base shell 110 , and connects the outside of the separator tube 130 and the first body valve 510 during the compression stroke. The tension chamber 161 is communicated with each other through the reservoir chamber 125 and the communication hole 300 .

Here, it can be understood that the prevention unit 200 to be described later is provided in the first body valve 510 and the second body valve 520 , respectively.

At this time, referring to FIG. 4 , the body valve assembly 500 is disposed on the upper portion of the second body valve 520 , and is formed to be stepped along the edge on the upper surface so that the bottom edge of the first body valve 520 is seated. A coupling piece 521 having a ring-shaped seating step 525 may be further provided.

Then, the body valve assembly 500 penetrates through the lower end edge of the first body valve 510 to communicate with the compression chamber 162 through the outside of the separator tube 130 and the internal flow path of the first body valve 510 . A first communication path 511 formed may be further provided.

In addition, the body valve assembly 500 penetrates through the lower end edge of the second body valve 520 to communicate with the outside of the separator tube 130 and the internal flow path of the second body valve 520 through a second communication path ( 522) may be further provided.

In addition, the body valve assembly 500 penetrates in the vertical direction of the first body valve 510 and is connected to the first communication path 511 to communicate with the reservoir chamber 125. A first auxiliary communication path 512 is formed. may be further provided.

In addition, the body valve assembly 500 passes through the upper portion of the second body valve 520 and is formed to communicate with the internal flow path of the second body valve 520 and the first auxiliary communication path 512 . It is of course also possible to further include (523).

As described above, the means for forming the flow passages for forming the first and second suction passages 201 and 202, that is, each of the communication passages 511, 522, 512, and 523 have been examined, and these first and second It can be seen that the prevention unit 200 for blocking or allowing the flow of the working fluid for the formation of the suction passages 201 and 202 largely includes a first check valve 210 and a second check valve 220 .

The first check valve 210 is disposed above the first body valve 510 and blocks the flow of the working fluid from the outside of the separator tube 130 to the compression chamber 162 side during the compression stroke, and the separator during the tension stroke. The first suction flow path 201 is formed by allowing the flow of the working fluid from the outside of the tube 130 toward the compression chamber 162 .

The second check valve 220 is disposed above the second body valve 520 and blocks the flow of the working fluid from the outside of the separator tube 130 toward the reservoir chamber 125 during the tension stroke, and the separator during the compression stroke. The second suction flow path 202 is formed by allowing the flow of the working fluid from the outside of the tube 130 toward the reservoir chamber 125 .

Accordingly, the first check valve 210 of the prevention unit 200 is again referred to in FIG. 2 , the compression chamber ( The first suction flow path 201 is opened to flow to 162 .

In addition, referring to FIG. 3 again, the prevention unit 200 is in the negative pressure state when the flow rate of the working fluid flowing into the tension chamber 161 through the piston valve 150 during the compression stroke is insufficient. This prevents the occurrence of lag when placed.

That is, the second check valve 220 of the prevention unit 200 opens the second suction flow path 202 from the outside of the separator tube 130 toward the reservoir chamber 125 to compensate for the insufficient flow rate of the working fluid while compressing it. When the stroke is converted to the tension stroke, the occurrence of a rack due to the negative pressure applied to the tension chamber 161 is prevented.

As described above, it can be seen that the basic technical idea of the present invention is to provide a body valve assembly of a variable damper built-in for a vehicle that prevents a lag phenomenon of the tension chamber during a compression stroke to improve riding comfort.

And, within the scope of the basic technical spirit of the present invention, many other modifications and applications are also possible for those of ordinary skill in the art.

100...damper unit
110...base shell
120...inner tube
125...reservoir chamber
130...Separator tube
140...piston rod
150...piston valve
151...tensile euro
152...Compressed Euro
161...tensile chamber
162...compression chamber
170...finish assembly
171...Road Guide
172...oil seal
200...prevention unit
201...First suction flow path
202...Second suction flow path
210...first check valve
220...Second check valve
300...Communication Hall
500...body valve assembly
510...first body valve
511...First communication path
512... First auxiliary communication path
520...Second body valve
521...Combination
522...Second communication path
523...Second auxiliary communication path
525...Standing Step

Claims (6)

a base shell, an inner tube built into the base shell, a separator tube disposed between the base shell and the inner tube to form a reservoir chamber between an outer circumferential surface of the inner tube, and a piston rod reciprocating the inner tube; , a piston valve mounted on the piston rod and interlocking with the piston rod to reciprocate and partition the upper and lower portions of the inner tube into a tension chamber and a compression chamber, respectively, and penetrated through the inner tube to form the reservoir chamber and the tension chamber a damper unit including a communication hole for communicating with each other; and
The reservoir is disposed under the inner tube, the separator tube, and the base shell, and opens a first suction flow path allowing a flow of a working fluid to the compression chamber during a tension stroke, and from the outside of the separator tube during a compression stroke and a prevention unit that prevents lag from occurring due to negative pressure applied to the tension chamber when the compression stroke is converted to the tension stroke by opening a second suction flow path connected to the tension chamber through the chamber. The body valve assembly of the vehicle's built-in variable damper featuring.
The method according to claim 1,
The prevention unit is
The body valve assembly for a built-in variable damper for a vehicle, characterized in that the first suction flow path is opened to flow from the reservoir chamber to the compression chamber as much as a working fluid corresponding to the volume of the piston rod during the tension stroke.
The method according to claim 1,
The prevention unit is
When the flow rate of the working fluid flowing into the tension chamber through the piston valve during the compression stroke is insufficient and the tension chamber becomes negative pressure, the second suction flow path toward the reservoir chamber from the outside of the separator tube is opened to prevent the occurrence of the rack due to the negative pressure applied to the tension chamber when the compression stroke is converted to the tension stroke while supplementing the insufficient flow rate of the working fluid.
The method according to claim 1,
The body valve assembly of the vehicle built-in variable damper,
a body valve assembly installed at the lower end of the inner tube and the lower end of the separator tube, disposed under the base shell, forming the first suction flow path during a tension stroke, and forming the second suction flow path during a compression stroke; including more,
The prevention unit is a body valve assembly for a built-in variable damper for a vehicle, characterized in that provided in each of the body valve assembly.
5. The method according to claim 4,
The body valve assembly,
a first body valve installed at the lower end of the inner tube to close the lower end of the separator tube, and communicating the outside of the separator tube with the compression chamber during a tensile stroke;
It is coupled to the lower surface of the first body valve and disposed at the lower end of the base shell, and during a compression stroke, the tension chamber communicates with the outside of the separator tube and the first body valve through the reservoir chamber and the communication hole and a second body valve,
The prevention unit is provided in the first body valve and the second body valve, respectively.
6. The method of claim 5,
The prevention unit is
It is disposed above the first body valve, blocks the flow of the working fluid from the outside of the separator tube toward the compression chamber during the compression stroke, and operates from the outside of the separator tube toward the compression chamber during the tension stroke. A first check valve allowing the flow of the fluid to form the first suction flow path;
It is disposed above the second body valve and blocks the flow of the working fluid from the outside of the separator tube to the reservoir chamber during the tension stroke, and operates from the outside of the separator tube toward the reservoir chamber during the compression stroke The body valve assembly of the variable damper for a vehicle, characterized in that it includes a second check valve that allows the flow of the fluid to form the second suction passage.

Images