• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    By using a pressure chamber to delay movement of a piston relative to a valve assembly covering the piston, a very compact and low restriction frequency dependent piston assembly is made, which offers many advantages over previous frequency dependent valves: - Extremely low added length - Requires no piston rod attenuating bypass channel - Easy and inexpensive to produce - Can be used hydraulically in series with an electro-hydraulic valve and also frequency-dependent "baseline" valve element - Offers more damping force reduction at high damper speeds.
    公开号:BE1023907B1
    申请号:E2016/0020
    申请日:2016-01-11
    公开日:2017-09-11
    发明作者:Shi Yan
    申请人:Shi Yan；
    IPC主号:
    专利说明:

    FREQUENT DEPENDENT SHOCK ABSORBER
    PRAYER OF THE INVENTION
    The present invention relates to a hydraulic shock absorber or shock absorber that can be adapted for use in a suspension system such as the systems used in transport vehicles, thus also including strut / strut dampers. More specifically, the present invention relates to a frequency dependent hydraulic damper, to provide different damping characteristics when subjected to input of different frequencies.
    BACKGROUND AND PRIOR ART
    Frequency-dependent hydraulic dampers from the prior art work with the principle of a by-pass / bypass channel alongside a main piston, which easily passes through bypass flow from the higher-pressure fluid chamber to the lower-pressure fluid chamber on the other side of the main piston, but this bypass flow is steadily shut off as a pressure chamber is filled to bias a valve assembly that controls the bypass flow. These dampers still require a conventional main piston for low frequency damping characteristics, and require a substantial (~ 10mm2) bypass channel to be fitted in the piston rod piston post. Reference: Koni - WO3030586, WO2013051934, Tenneco - WO2015130544, WO2015 / 030.884.
    There are three major weaknesses of these dampers: 1) Reduced safety margin due to removal of material from a crucial structural location, the piston post, with possible fatal consequences with a spring strut under lateral load. 2) Frequency dependent effect less effective at higher damper speeds due to limitations of limited cross-section of bypass channel in piston post. 3) Reduced damper stroke leads to more end stop stops that speeds up body damage and reduces comfort.
    SUMMARY OF THE INVENTION
    The invention seeks to eliminate the aforementioned problems 1) and 2), and 3) greatly improve, by using a different operating principle than all known prior art dampers. Instead of controlling a bypass flow that bypasses the main piston with a slowly filled pressure chamber, the invention directly influences the fluid flow through the aforementioned main piston. This is achieved by using a piston that is not fixed relative to the piston rod and the main valve assembly, the movement of the piston being controlled with a pressure chamber the volume of which should decrease as the piston moves to the pressure chamber. Movement of the piston thus varies biasing force on the main valve assembly. This eliminates the need for a large diversion channel and saves on dead length and components.
    The invention is a shock absorber comprising a frequency dependent piston assembly (1), comprising: a piston (10) slidably disposed within a portion of a cylinder (20), which piston (10) encloses the volume enclosed in the cylinder (20) ) divides into a first chamber (21) and a second chamber (22), the piston (10) comprising a flow channel (11) connecting the first chamber (21) to the second chamber (22); a valve assembly (100) disposed against the piston (10), in the second chamber (22), which covers said flow channel (11) to throttle fluid flow (150) from the first chamber (21) to the second chamber (22) ; characterized in that said piston assembly (1) further comprises: a pressure chamber (300) comprising: a flexible and / or movable chamber wall (301) configured to be moved by said piston (10) about the enclosed volume of change the aforementioned pressure chamber (300).
    BRIEF DESCRIPTION OF THE DRAWINGS
    The present invention will be more fully understood from the detailed description and the accompanying drawings, wherein: Figure 1 shows an embodiment of the invention that is frequency dependent in both compression and rebound.
    An embodiment of the invention is shown in Figure 2 after some time in rebound (outbound) stroke.
    An embodiment of the invention is shown in Figure 3 after some time in compression (input) stroke.
    It is shown in Figure 4 an embodiment of the invention that is only frequency dependent in rebound and wherein said cylinder (20) is a housing.
    There is shown in Figure 5 an embodiment of the invention in which the aforementioned chamber wall (301) is formed by the aforementioned piston (10).
    An embodiment of the invention is shown in Figure 6 in which two piston assemblies (1) are used.
    Fig. 7 shows an embodiment of the invention in which an electronically controlled electro-hydraulic valve is used.
    DESCRIPTION OF THE REFERENCE FIGURES 1: Frequency dependent piston assembly 10: Piston 11: Flow channel (between chamber 1 and chamber 2) 20: Portion of cylinder 21: First chamber 22: Second chamber 30: Piston rod 31: Reduced diameter section 1 32: Reduced diameter section 2 33: Washer 34: Nut 60: Electronically controlled solenoid valve 100: Valve assembly 150: Fluid flow 300: Pressure chamber 301: Chamber wall 303: Pedestal chamber 380: Flow restrictor 381: Opening 382: Non-return valve
    DETAILED DESCRIPTION OF THE DRAWINGS
    The following description of the preferred embodiment (s) is exemplary in nature and is in no way intended to limit the invention, its applications, or use. If the same reference number appears on different drawings, the same reference number designates similar or corresponding parts on the different drawings.
    An embodiment of the invention is shown in Figure 1:
    A shock absorber comprising a frequency dependent piston assembly (1), comprising: a piston (10) slidably disposed within a portion of a cylinder (20), which piston (10) divides the volume enclosed in the cylinder (20) into a first chamber (21) and a second chamber (22), the piston (10) comprising a flow channel (11) connecting the first chamber (21) to the second chamber (22); a valve assembly (100) disposed against the piston (10), in the second chamber (22), which covers said flow channel (11) to throttle fluid flow (150) from the first chamber (21) to the second chamber (22) ; characterized in that said piston assembly (1) further comprises: a pressure chamber (300) comprising: a flexible and / or movable chamber wall (301) configured to be pushed through said piston (10) at higher pressure in the first chamber (21) then the second chamber (22) to reduce the enclosed volume of said pressure chamber (300); a chamber base (303) to limit distortion and / or displacement of said chamber wall (301).
    In addition, in the embodiment of Figure 1 it can be seen that:
    The aforementioned piston (10) is connected to a stepped portion of smaller diameter (31) of a rod (30).
    The aforementioned rod (30) also comprises a second stepped portion of smaller diameter (32).
    The aforementioned rod (30) extends outward and moves back and forth through the aforementioned cylinder (20).
    The aforementioned chamber wall (301) comprises a rigid plate.
    The aforementioned piston assembly (1) further comprises a flow restrictor (380), which throttles fluid flow from or to the aforementioned pressure chamber (300).
    The aforementioned flow restriction (380) comprises a thin opening disk (381).
    The aforementioned flow restrictor (380) includes a check valve (382) which opens a larger flow cross section depending on the direction of fluid flow.
    It is shown in Figure 2 that the situation has elapsed after some time with the first chamber (21) at a higher pressure than the second chamber (22). Pressure chamber wall (301) is pressed by the piston (10) up to the stop against the chamber base (303), but at the same time valve discs in valve assembly (100) are biased by movement of the piston (10) through which the fluid flow (150) throttles more through the piston, resulting in the generation of higher damping force than is the case in Figure 1. It can be seen how the movement of the aforementioned valve body (10) would be delayed because fluid from pressure chamber (300) via flow limitation 380) must be pressed.
    Figure 3 shows the situation with the relative positions of the first chamber (21) and the second chamber (22) reversed, after some time has elapsed with the first chamber (21) at a higher pressure than the second room (22). The coil spring in valve assembly (100) is biased by movement of the piston (10), causing the flow of liquid (150) through the piston to be smothered harder than in the original state. It is visible how the aforementioned pressure chamber (300) also functions as a clamping ring (33).
    There is shown in Figure 4 an embodiment of the invention in which a portion of cylinder (20) is a housing, and is only frequency dependent in one direction (rebound in this embodiment).
    There is shown in Figure 5 an embodiment of the invention in which a portion of cylinder (20) is a housing, and in addition, the aforementioned invention is just like embodiment in Figure 1:
    A shock absorber comprising a frequency dependent piston assembly (1), comprising: a piston (10) slidably disposed within a portion of a cylinder (20), which piston (10) divides the volume enclosed in the cylinder (20) into a first chamber (21) and a second chamber (22), the piston (10) comprising a flow channel (11) connecting the first chamber (21) to the second chamber (22); a valve assembly (100) disposed against the piston (10), in the second chamber (22), which covers said flow channel (11) to throttle fluid flow (150) from the first chamber (21) to the second chamber (22) ; characterized in that said piston assembly (1) further comprises: a pressure chamber (300) comprising: a flexible and / or movable chamber wall (301) configured to be moved by said piston (10) about the enclosed volume of change the aforementioned pressure chamber (300).
    In addition to the embodiment of Figure 5, it can be seen that:
    The aforementioned chamber wall (301) comprises a part of the aforementioned piston (10).
    There is shown in Figure 6 an embodiment of the invention in which two piston assemblies (1) are used, wherein the two piston assemblies (1) each have their own second chamber (22) and a common first chamber (21). The light-loaded valve assembly that hardly smokes liquid flow from the second chamber (22) to the first chamber (21) also provides the possibility of independent leakage tuning.
    Fig. 7 shows an embodiment of the invention in which an electronically controlled hydraulic valve (60) is used. It should be understood that the embodiment of the electro-hydraulic valve (60) may be different as well as the location of piston assembly (1). For example, the piston assembly (1) can also be used hydraulically in series as a "baseline" valve for an external electro-hydraulic valve (60).
    While the embodiments of the present invention have been described with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the claims below. .
    权利要求:
    Claims (16)
    [1]
    CONCLUSIONS
    A shock absorber comprising a frequency dependent piston assembly (1), comprising: a piston (10) slidably disposed within a portion of a cylinder (20), said piston (10) dividing the volume enclosed in the cylinder (20) into a first chamber (21) and a second chamber (22), the piston (10) comprising a flow channel (11) connecting the first chamber (21) to the second chamber (22); a valve assembly (100) disposed against the piston (10), in the second chamber (22), which covers said flow channel (11) to throttle fluid flow (150) from the first chamber (21) to the second chamber (22) ; characterized in that said piston assembly (1) further comprises: a pressure chamber (300) comprising: a flexible and / or movable chamber wall (301) configured to be pushed by said piston (10) at higher pressure in the first chamber (21) then the second chamber (22) to reduce the enclosed volume of said pressure chamber (300); a chamber base (303) to limit distortion and / or displacement of said chamber wall (301).
    [2]
    The shock absorber according to any of the preceding claims, characterized in that: said chamber wall (301) is configured to also be pulled through said piston (10) at lower pressure in the first chamber (21) than the second chamber ( 22) to increase the enclosed volume of the aforementioned pressure chamber (300).
    [3]
    The shock absorber according to any of the preceding claims, characterized in that: said cylinder (20) is a housing.
    [4]
    The shock absorber according to any of the preceding claims, characterized in that: said piston (10) is connected to a stepped portion of smaller diameter (31) of a rod (30).
    [5]
    The shock absorber according to any of the preceding claims, characterized in that: said rod (30) also comprises a second stepped portion of smaller diameter (32).
    [6]
    The shock absorber according to any one of the preceding claims, characterized in that: said rod (30) extends outward and moves back and forth through said cylinder (20).
    [7]
    The shock absorber according to any one of the preceding claims, characterized in that the aforementioned shock absorber further comprises: an electro-hydraulic valve (60).
    [8]
    The shock absorber according to any one of the preceding claims, characterized in that: said piston assembly (1) comprises an opening disk having an opening slot of variable cross-section.
    [9]
    The shock absorber according to any of the preceding claims, characterized in that: The aforementioned chamber wall (301) comprises a flexible disk.
    [10]
    The shock absorber according to any of the preceding claims, characterized in that: The aforementioned chamber wall (301) comprises a rigid plate.
    [11]
    The shock absorber according to any of the preceding claims, characterized in that: The aforementioned chamber wall (301) comprises a part of the aforementioned piston (10).
    [12]
    The shock absorber according to any of the preceding claims, characterized in that: The aforementioned chamber foot (303) also has the function of a clamping ring (33) or clamping nut (34).
    [13]
    The shock absorber according to any of the preceding claims, characterized in that said piston assembly (1) further comprises: a flow restrictor (380), which throttles fluid flow from or to said pressure chamber (300).
    [14]
    The shock absorber according to any one of the preceding claims, characterized in that: the aforementioned flow restriction (380) comprises a thin opening disc (381).
    [15]
    The shock absorber of any one of the preceding claims, characterized in that: said flow restriction (380) comprises a check valve (382) which opens a larger flow cross section depending on the direction of fluid flow.
    [16]
    A shock absorber comprising a frequency dependent piston assembly (1), comprising: a piston (10) slidably disposed within a portion of a cylinder (20), said piston (10) dividing the volume enclosed in the cylinder (20) into a first chamber (21) and a second chamber (22), the piston (10) comprising a flow channel (11) connecting the first chamber (21) to the second chamber (22); a valve assembly (100) disposed against the piston (10), in the second chamber (22), which covers said flow channel (11) to throttle fluid flow (150) from the first chamber (21) to the second chamber (22) ; characterized in that said piston assembly (1) further comprises: a pressure chamber (300) comprising: a flexible and / or movable chamber wall (301) configured to be moved by said piston (10) about the enclosed volume of change the aforementioned pressure chamber (300).
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    同族专利:
    公开号 | 公开日
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    CN108713111A|2018-10-26|
    EP3397874A1|2018-11-07|
    WO2017112980A1|2017-07-06|
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    EP3397874B1|2020-03-11|
    BE1023716B1|2017-06-26|
    US10907699B2|2021-02-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102015205556A1|2014-03-28|2015-10-01|Mando Corporation|PISTON ARRANGEMENT FOR SHOCK ABSORBER|
    WO2015185274A1|2014-06-05|2015-12-10|Zf Friedrichshafen Ag|Frequency-dependent damping valve arrangement|
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    NL1019313C2|2001-11-06|2003-05-12|Koni Bv|Shock absorber with frequency dependent damping.|
    JP3978707B2|2001-11-29|2007-09-19|株式会社日立製作所|Damping force adjustable hydraulic shock absorber|
    JP4055060B2|2002-09-30|2008-03-05|株式会社日立製作所|Hydraulic shock absorber|
    DE502004005243D1|2003-07-08|2007-11-29|Thyssenkrupp Bilstein Suspensi|Vibration damper with amplitude-dependent damping|
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    DE602006000580T2|2005-06-06|2009-03-19|Kayaba Industry Co., Ltd.|shock absorber|
    DE102009023686B4|2009-06-03|2014-06-12|Reinhard Hölscher|Frequency-dependent vibration damper in monotube design|
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    KR101288612B1|2011-07-21|2013-07-22|주식회사 만도|Valve structure of a shock absorber|
    NL2007530C2|2011-10-04|2013-04-08|Koni Bv|FREQUENCY-DEPENDENT DAMPER.|
    JP6027451B2|2013-01-25|2016-11-16|Ｋｙｂ株式会社|Shock absorber|
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    KR101876915B1|2013-10-28|2018-08-09|주식회사 만도|Piston valve assembly of shock absorber|
    DE102013114169A1|2013-12-17|2015-06-18|Thyssenkrupp Bilstein Gmbh|Adjustable vibration damper for motor vehicles|
    US9500255B2|2014-02-28|2016-11-22|Tenneco Automotive Operating Company Inc.|Shock absorber with frequency dependent passive valve|
    KR102172160B1|2014-04-30|2020-10-30|주식회사 만도|Damping force variable valve assembly and damping force variable shock absorber having the assembly|
    KR101563963B1|2014-06-12|2015-10-28|주식회사 만도|Damping force controlling shock absorber|
    WO2016066314A1|2014-10-27|2016-05-06|Thyssenkrupp Bilstein Gmbh|Method for operating a controllable shock absorber for motor vehicles|
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    CN204372028U|2014-12-22|2015-06-03|吉林大学|Amplitude is correlated with damping characteristic vibration damper|BE1023718B1|2016-01-01|2017-06-26|Shi Yan|Shock absorber with frequency dependent piston assembly|
    DE102016208845A1|2016-05-23|2017-11-23|Thyssenkrupp Ag|Frequency-selective vibration damper for motor vehicles with a bypass control valve|
    DE102016208844A1|2016-05-23|2017-11-23|Thyssenkrupp Ag|Frequency-selective vibration damper for motor vehicles with a bypass control valve|
    法律状态:
    2017-12-13| FG| Patent granted|Effective date: 20170911 |
    2018-11-08| MM| Lapsed because of non-payment of the annual fee|Effective date: 20180131 |
    优先权:
    申请号 | 申请日 | 专利标题
    BE2016/0014|2016-01-03|
    BE2016/0014A|BE1023716B1|2016-01-03|2016-01-03|Frequency dependent shock absorber|
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