KR101254303B1 - Valve structure of a shock absorber - Google Patents
Valve structure of a shock absorber Download PDFInfo
- Publication number
- KR101254303B1 KR101254303B1 KR1020100100941A KR20100100941A KR101254303B1 KR 101254303 B1 KR101254303 B1 KR 101254303B1 KR 1020100100941 A KR1020100100941 A KR 1020100100941A KR 20100100941 A KR20100100941 A KR 20100100941A KR 101254303 B1 KR101254303 B1 KR 101254303B1
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- KR
- South Korea
- Prior art keywords
- shock absorber
- rebound
- valve
- working fluid
- piston body
- Prior art date
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to a shock absorber, and more particularly, to a valve structure of a shock absorber installed in a shock absorber to control damping force.
According to the present invention, in the valve structure of the shock absorber having a piston valve installed at the end of the piston rod and operating in a state bisecting the cylinder to generate a damping force, the piston valve is a working fluid during compression of the shock absorber. A piston body having at least one compression passage therethrough and at least one rebound passage through which the working fluid passes upon expansion of the shock absorber; Compression valve means disposed above the piston body to generate a damping force against pressure of the working fluid passing through the compression passage; Rebound valve means disposed under the piston body to generate a damping force against pressure of the working fluid passing through the rebound passage; Includes, the piston body, the slit forming portion that can adjust the damping force through the slit formed on the edge and the thickness variable portion that can adjust the damping force according to the thickness, wherein the slit forming portion and the thickness variable portion the piston body Provided is a valve structure of a shock absorber, which is formed integrally with the shock absorber.
Description
The present invention relates to a shock absorber, and more particularly, to a valve structure of a shock absorber installed in a shock absorber to control damping force.
In general, a shock absorber is provided between the vehicle body side and the wheel side to absorb various vibrations or shocks transmitted from the wheels in contact with the road surface while driving to improve the vehicle ride comfort and driving stability.
1 is a cross-sectional view showing a conventional general shock absorber.
The
The cylinder 1 is composed of an inner tube 1a and an outer tube 1b outside thereof. The inner tube 1a is filled with a working fluid, that is, oil, and the outer tube 1b is filled with a working fluid for compensating the pressure in the inner tube 1a.
An upper cap 3 penetrating the upper portion of the
In addition, a
On the other hand, the
Meanwhile, a plurality of through
In addition, the
2 is a cross-sectional view showing a conventional dual flow valve structure installed at the end of a piston rod. 3 is a perspective view illustrating a rebound disk and a pilot case of the dual flow valve structure shown in FIG. 2.
The shock absorber is provided with a piston rod (2) installed reciprocally in the cylinder (1) and one end of the piston rod (2), and the inside of the cylinder (1) to the upper and lower chambers (6, 7). And a
The piston valve (20) includes a piston body (24) in which at least one compression passage (26) through which the working fluid passes during compression of the shock absorber and at least one rebound passage (25) through which the working fluid passes during the expansion of the shock absorber ).
The
The rebound valve means 30 is mounted on the bottom surface of the
In the rebound stroke of the
Further, when the speed of the
When the pressure of the working fluid is further increased, the working fluid presses the
The compression valve means 40 also includes a
The
4 is an exploded perspective view of a conventional piston body.
As shown in FIG. 4, the
However, if such a laminated structure has a risk of productivity and quality problems due to many valve parts. That is, referring again to FIG. 2, the
Furthermore, since the pilot disk-
Accordingly, research and development on the valve structure of the shock absorber, which can prevent misassembly of the valve and improve productivity, needs to be continuously made.
In order to solve these problems, the present invention does not combine the pilot disk and the pilot disk-S to the piston body, but instead manufactures the pilot disk, the pilot disk-S, and the piston body as an integrated shock absorber having improved productivity and quality. To provide a valve structure of.
According to the present invention for achieving the above object, in the valve structure of the shock absorber having a piston valve which is installed at the end of the piston rod and operates in a state in which the inside of the cylinder is bisected to generate a damping force, the piston valve is, A piston body having at least one compression passage through which the working fluid passes during compression, and at least one rebound passage through which the working fluid passes upon expansion of the shock absorber; Compression valve means disposed above the piston body to generate a damping force against pressure of the working fluid passing through the compression passage; Rebound valve means disposed under the piston body to generate a damping force against pressure of the working fluid passing through the rebound passage; Includes, the piston body, the slit forming portion that can adjust the damping force through the slit formed on the edge and the thickness variable portion for adjusting the damping force according to the thickness, wherein the slit forming portion and the thickness variable portion the piston body Provided is a valve structure of a shock absorber, which is formed integrally with the shock absorber.
Preferably, the thickness variable portion and the slit forming portion are integrally formed with the piston body through sintering.
Here, the slits are preferably formed separately through processing after the sintering is finished.
Preferably, the slit forming part and the thickness varying part are present both vertically and symmetrically based on the piston body.
According to the present invention as described above, the valve structure of the shock absorber formed integrally with the pilot disk, the pilot disk-S and the piston body can be provided.
Accordingly, according to the present invention, since the pilot disk and the pilot disk-S do not need to be separately assembled to the piston body, the quality due to misassembly can be prevented from being degraded and workability can be improved.
In addition, according to the present invention, since the piston body is integral, even pressure is distributed during operation, thereby making it possible to compensate for the weak part of the piston valve.
In addition, in the conventional case, the pilot disk-S was manufactured through press working, but there was a big limitation in varying the shape of the slit. The degree of freedom in tuning the damping force characteristic can be increased.
1 is a cross-sectional view showing a conventional shock absorber.
2 is a cross-sectional view showing a valve structure of a dual flow type installed at the end of a conventional piston rod.
3 is a perspective view showing a rebound disk and a pilot case of the dual flow valve structure shown in FIG.
Figure 4 is an exploded perspective view of a conventional piston body.
Figure 5 is a cross-sectional view showing a dual flow valve structure according to the present invention.
6 is an enlarged view of a portion A of FIG. 5.
7 is a perspective view of a piston body applied to the dual flow valve structure according to the present invention.
Hereinafter, a valve structure of a shock absorber according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.
5 is a cross-sectional view showing a dual flow type valve structure according to the present invention.
As shown in FIG. 5, the valve structure of the shock absorber according to the present invention has a
The
In addition, the
The rebound valve means 130 includes a
The
The
A
The
In the rebound stroke of the
In addition, when the speed of the
As the pressure of the working fluid is further increased, the working fluid pressurizes the
The compression valve means 140 also includes a
FIG. 6 is an enlarged view of portion A of FIG. 5, and FIG. 7 is a perspective view of a piston body applied to the dual flow valve structure according to the present invention.
6 and 7, in the
delete
In addition, the
As mentioned above, the valve structure of the shock absorber which concerns on this invention was demonstrated with reference to the preferred embodiment of this invention. However, it should be understood that the present invention is not limited to the above-described embodiments and drawings, and various modifications and changes may be made by those skilled in the art without departing from the scope of the present invention.
101: cylinder 102: piston rod
120: piston valve 124: piston body
125: rebound passage 126: compression passage
130: rebound valve means 131: rebound disk
132: rebound seal portion 133: pilot case
133a: pilot opening 133b: rebound back pressure chamber
135: rebound valve 140: compression valve means
141: compression disk 142: compression seal portion
143: pilot case 145: compression valve
151: variable thickness portion 152: slit forming portion
153: slit
Claims (4)
The piston valve 120,
A piston body 124 having one or more compression passages 126 through which the working fluid passes when the shock absorber is compressed, and one or more rebound passages 125 through which the working fluid passes when the shock absorber is extended;
Compression valve means (140) disposed above the piston body (124) to generate a damping force against the pressure of the working fluid passing through the compression passage (126);
Rebound valve means (130) disposed under the piston body (124) to generate a damping force against pressure of the working fluid passing through the rebound passage (125); Including,
The piston body 124,
And a slit forming portion 152 that can adjust the damping force through the slit 153 formed at the edge and a thickness variable portion 151 that can adjust the damping force according to the thickness. Part 151 is the valve structure of the shock absorber, characterized in that formed integrally through the piston body 124 through sintering.
The slit 153 is a valve structure of the shock absorber, characterized in that formed separately through the processing after finishing the sintering.
The slit forming portion (152) and the thickness variable portion 151 is a valve structure of the shock absorber, characterized in that both exist up and down symmetry relative to the piston body (124).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100100941A KR101254303B1 (en) | 2010-10-15 | 2010-10-15 | Valve structure of a shock absorber |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100100941A KR101254303B1 (en) | 2010-10-15 | 2010-10-15 | Valve structure of a shock absorber |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20120039301A KR20120039301A (en) | 2012-04-25 |
KR101254303B1 true KR101254303B1 (en) | 2013-04-12 |
Family
ID=46139709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020100100941A KR101254303B1 (en) | 2010-10-15 | 2010-10-15 | Valve structure of a shock absorber |
Country Status (1)
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KR (1) | KR101254303B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL237405B1 (en) * | 2017-10-12 | 2021-04-19 | Akademia Gorniczo Hutnicza Im Stanislawa Staszica W Krakowie | Fluid spring with variable damping force |
US11427337B2 (en) * | 2019-01-30 | 2022-08-30 | Goodrich Corporation | Radial slit disc energy attenuation system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004125023A (en) | 2002-09-30 | 2004-04-22 | Tokico Ltd | Hydraulic buffer |
JP2005344911A (en) | 2004-06-07 | 2005-12-15 | Hitachi Ltd | Hydraulic shock absorber |
JP2006275216A (en) | 2005-03-30 | 2006-10-12 | Hitachi Ltd | Piston structure of hydraulic shock absorber |
JP2009108984A (en) | 2007-10-31 | 2009-05-21 | Hitachi Ltd | Hydraulic shock absorber |
-
2010
- 2010-10-15 KR KR1020100100941A patent/KR101254303B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004125023A (en) | 2002-09-30 | 2004-04-22 | Tokico Ltd | Hydraulic buffer |
JP2005344911A (en) | 2004-06-07 | 2005-12-15 | Hitachi Ltd | Hydraulic shock absorber |
JP2006275216A (en) | 2005-03-30 | 2006-10-12 | Hitachi Ltd | Piston structure of hydraulic shock absorber |
JP2009108984A (en) | 2007-10-31 | 2009-05-21 | Hitachi Ltd | Hydraulic shock absorber |
Also Published As
Publication number | Publication date |
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KR20120039301A (en) | 2012-04-25 |
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