WO2024019681A1 - Ensemble piston permettant de réaliser un amortissement secondaire - Google Patents

Ensemble piston permettant de réaliser un amortissement secondaire Download PDF

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Publication number
WO2024019681A1
WO2024019681A1 PCT/TR2023/050309 TR2023050309W WO2024019681A1 WO 2024019681 A1 WO2024019681 A1 WO 2024019681A1 TR 2023050309 W TR2023050309 W TR 2023050309W WO 2024019681 A1 WO2024019681 A1 WO 2024019681A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve group
piston assembly
internal chamber
internal
sleeve
Prior art date
Application number
PCT/TR2023/050309
Other languages
English (en)
Inventor
Gurhan ALTINEL
Abdurrahim ARKAN
Semih CALLI
Gulcin BOZKURT
Resitcan YIGITTOP
Original Assignee
Maysan Mando Otomotiv Parcalari Sanayi Ve Ticaret Anonim Sirketi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maysan Mando Otomotiv Parcalari Sanayi Ve Ticaret Anonim Sirketi filed Critical Maysan Mando Otomotiv Parcalari Sanayi Ve Ticaret Anonim Sirketi
Publication of WO2024019681A1 publication Critical patent/WO2024019681A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/48—Arrangements for providing different damping effects at different parts of the stroke
    • F16F9/49—Stops limiting fluid passage, e.g. hydraulic stops or elastomeric elements inside the cylinder which contribute to changes in fluid damping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/42—Multiple pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/185—Bitubular units

Definitions

  • the present invention relates to at least one piston assembly comprising at least one internal tube and at least one external tube positioned in the invention, at least one external chamber defined between the internal tube and the external tube, and the at least one internal chamber defined in the internal tube for placing the hydraulic fluid in it, at least one piston rod, which is at least partially movable within said internal chamber, at least one first valve group positioned on the said piston rod to allow limited passage in case of jamming of the hydraulic fluid in the internal chamber, at least one second valve group to allow limited passage in the event of hydraulic fluid entrapment by being positioned between the internal chamber and the internal chamber.
  • Pistons also known as shock absorbers, are elements used to reduce the severity and effect of shocks and vibrations that occur during operation in vehicles.
  • the pistons show a resistance that is inverse to the direction of movement and is proportional to the speed. Thus, they absorb the energy that causes jolt and vibration by converting it into heat.
  • Pistons can be used in all kinds of impact machines (textile machines, presses, construction machines, lifting machines, etc.), especially vehicles.
  • the working principle of the pistons is based on the principle of converting the movement energy into heat and swallowing it by showing resistance to movement by friction.
  • Pistons can be liquid, or liquidgas based. Liquid types of oil are used. Based on the high viscosity (consistency) property, which is the internal molecular friction of the oils, the energy converted to heat is absorbed by the friction between the molecules compressed by forcing the oil under pressure to pass through narrow channels.
  • Pistons play an important role in these elements. They are effective in the hardness levels of the pistons, the handling of the vehicles, the driving comfort, and the transmission of the defects on the road to the vehicle. The hardness of the pistons increases the vehicle's handling and steering control while reducing ride comfort. Conversely, the pistons being too soft causes the driver to feel the vibrations on rough roads and reduces their comfort.
  • This hydraulic damping assembly contains a main tube that forms the fluid chamber.
  • An external tube extends around the main tube. Defines a balancing chamber between the main and external tubes.
  • a main piston located in the main tubes divides the fluid chamber into a compression chamber and a recoil chamber.
  • a piston rod is connected to the main piston.
  • a bottom valve located in the compression chamber is connected to the main tube.
  • a hydraulic clamping stopper in the clamping chamber comprises an additional piston, a spacer, and a fixing element.
  • the additional piston is connected to the main piston.
  • the joint in the compression chamber is connected to the base valve.
  • the insert has one main section and one terminal section.
  • the outer diameter of the terminal section is smaller than the outer diameter of the main section.
  • the liquid chamber has a closed volume and the grooves on the sides allow the passage of fluid. This causes the system damping force not to be adjusted as desired. These grooves in the liquid chamber both bring an additional cost for the manufacture of the liquid chamber and prevent adjustability.
  • the pistons are designed according to the characteristics of the vehicle on which they will be located and are expected to have a predetermined hardness performance. However, different piston production for each vehicle means additional workload and logistics for the manufacturers.
  • the present invention relates to a piston assembly for eliminating the above-mentioned disadvantages and bringing new advantages to the relevant technical field.
  • An object of the invention is to provide a piston assembly having an improved damping feature.
  • the present invention relates to at least one piston assembly comprising at least one internal tube and at least one external tube positioned in the invention, at least one external chamber defined between the internal tube and the external tube, and the at least one internal chamber defined in the internal tube for placing the hydraulic fluid in it, at least one piston rod, which is at least partially movable within said internal chamber, at least one first valve group positioned on the said piston rod to allow limited passage in case of jamming of the hydraulic fluid in the internal chamber, at least one second valve group to allow limited passage in the event of hydraulic fluid entrapment by being positioned between the internal chamber and the internal chamber in order to realize all the objects that will emerge from the abovementioned and the following detailed description.
  • its novelty comprises at least one secondary damping rod positioned on the side of the piston rod facing the internal chamber and movable with the piston rod to dampen sudden force loads, at least one sleeve with an inner cavity in which said secondary damping rod can be at least partially penetrated by moving, and at least one third valve group to allow limited passage to the internal chamber in the event of hydraulic fluid being compressed in the inner cavity on said sleeve.
  • a possible embodiment of the invention is characterized in that it comprises at least one enlarged form for sealing the secondary damping arm into the inner cavity of the sleeve.
  • the secondary damping rod is firmly pressed against the sleeve and can be moved in a sealed manner.
  • Another possible embodiment of the invention is characterized in that the third valve group is positioned on the side facing the second valve group on the sleeve.
  • the hydraulic fluid stuck in the inner cavity passes through the third valve group and then through the second valve group to the external chamber.
  • Another possible embodiment of the invention is characterized in that the third valve group is positioned on at least one retaining part. Thus, ease of assembly is obtained in the production stage.
  • Another possible embodiment of the invention is characterized in that it comprises at least one housing for holding the sleeve on said retaining part. Thus, it is ensured that the sleeve is mounted on the retaining part.
  • Another possible embodiment of the invention is characterized in that the retaining part is secured to the internal chamber. Thus, ease of assembly is obtained in the production stage.
  • Figure 1 shows a representative cross-sectional view of the piston assembly of the invention in the first position.
  • Figure 2 shows a representative cross-sectional view of the piston assembly of the invention in the second position.
  • the invention relates to a piston assembly (10).
  • the piston assembly (10) of the invention is a mechanism that at least partially dampens between the first side (T1 ) and a second side (T2) between which it is positioned during operation. At least one of the first side (T 1 ) and the second side (T2) to which the piston assembly (10) is connected may be movable.
  • the piston assembly (10) allows the force to be damped between the two sides.
  • the piston assembly (10) is located on vehicles in a possible embodiment of the invention. In vehicles, the first side (T1) is the vehicle body, while the second side (T2) is the wheel of the vehicle. In this way, damping is provided between the vehicle body and the vehicle wheel.
  • the piston assembly (10) is not limited to this, it can also be used in different areas such as textile machines, presses, construction machines, and lifting machines.
  • the piston assembly (10) of the invention has an interlocking internal tube (11 ) and an external tube (13).
  • the inner part of the internal tube (11) is defined as an internal chamber (12) and the part between the internal tube (11 ) and the external tube (13) is defined as an external chamber (14).
  • the internal chamber (12) and the external chamber (14) are associated with each other and contain hydraulic fluid.
  • the hydraulic fluid enables damping in the piston assembly (10).
  • There is a piston rod (20) extending from one side of the internal tube (11) towards the internal chamber (12).
  • the piston rod (20) is at least partially movable through the internal chamber (12).
  • There is a first valve group (V1) provided around the end of the piston rod (20) inside the internal tube (11).
  • the first valve group (V1) is configured to dampen during fluid transport within the internal chamber (12). For this, the first valve group (V1 ) limits the passage of fluid from the internal chamber (12) to the external chamber (14).
  • controlled fluid passage is provided between the opposite sides of the internal chamber (12), which is divided by the first valve group (V1 ).
  • the fluid passage within the internal chamber (12) is controlled by the first valve group (V1).
  • hydraulic fluid is transported from the internal chamber (12) to the external chamber (14). This fluid transport is controlled by the second valve group (V2) in the piston assembly (10). In the event of reverse movement, the fluid transfer from the external chamber (14) to the internal chamber (12) is carried out in a controlled manner by the second valve group (V2).
  • the piston assembly (10) of the invention is configured to perform secondary damping.
  • Secondary damping provides damping in case of sudden and unusual force on the piston assembly (10).
  • the sleeve (30) is formed to have an inner cavity (31 ).
  • the sleeve (30) is preferably cylindrical in shape.
  • the secondary damping rod (21) is located on the side of the piston rod (20) facing the sleeve (30).
  • the secondary damping rod (21) is sized to enter and exit the sleeve (30).
  • the secondary damping rod (21 ) is sealed against the sleeve (30).
  • the secondary damping rod (21) has an extended form (22).
  • the chamfered form can be found on the side of the sleeve (30) facing the secondary damping rod (21 ) so that the secondary damping rod (21 ) can easily enter and exit the sleeve (30).
  • At least one third of the valve group (V3) is positioned on the other side of the sleeve (30) while it is passed to the secondary damping rod (21).
  • the third valve group (V3) is inserted tightly into the internal chamber.
  • the third valve group (V3) allows the fluid passage between the inner cavity (31) of the sleeve (30) and the internal chamber (12) to be regulated.
  • the third valve group (V3) is preferably positioned on at least one retaining part (40).
  • the retaining part (40) is formed to surround the third valve group (V3). In this way, ease of assembly is obtained during the production phase.
  • the housing (41 ) is essentially a recessed form provided on the retaining part (40).
  • the wall of the sleeve (30) is at least partially located in the housing (41). In this way, it is ensured that the sleeve (30) is fixed on the third valve group (V3).
  • FIG. 1 A representative cross-sectional view of the piston assembly (10) of the invention at the first position (I) is given in Figure 1. Accordingly, in the first position (I), the piston assembly (10) is not subjected to a sudden load. While in this position, the secondary damping rod (21) is positioned outside the sleeve (30). The piston assembly (10) can operate in the first position
  • the piston assembly (10) is loaded with a sudden and unusual force.
  • the first position (I) is moved to the second position (II).
  • the reason for this approach may be undesirable vibrations where the piston assembly (10) is used.
  • the hydraulic fluid in the internal chamber (12) first tries to stop the piston rod (20) by compressing.
  • the secondary damping rod (21 ) enters the sleeve (30). In this case, the hydraulic fluid in the inner cavity (31) of the sleeve (30) is compressed.
  • the third valve group (V3) provides limited hydraulic fluid passage to the internal chamber (12).
  • the second valve group (V2) also provides a limited hydraulic fluid selection from the internal chamber (12) to the external chamber (14).
  • the valve groups are allowed to return to the first position (I) by allowing back fluid movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

L'invention concerne au moins un ensemble piston (10) comprenant au moins un tube interne (11) et au moins un tube externe (13) positionnés dans l'invention, au moins une chambre externe (14) définie entre le tube interne (11) et le tube externe (13) et l'au moins une chambre interne (12) définie dans le tube interne (11) pour placer le fluide hydraulique dans celle-ci, au moins une tige de piston (20), qui est au moins en partie mobile à l'intérieur de ladite chambre interne (12), au moins un premier groupe de soupapes (V1) positionnées sur ladite tige de piston (20) pour permettre un passage limité en cas d'entassement du fluide hydraulique dans la chambre interne (12), au moins un second groupe de soupapes (V2) pour permettre un passage limité en cas de piégeage du fluide hydraulique en étant positionné entre la chambre interne (12) et la chambre externe (14).
PCT/TR2023/050309 2022-07-21 2023-03-31 Ensemble piston permettant de réaliser un amortissement secondaire WO2024019681A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2022/011664 2022-07-21
TR2022/011664A TR2022011664A2 (tr) 2022-07-21 2022-07-21 İki̇nci̇l sönümleme yapabi̇len bi̇r pi̇ston terti̇bati

Publications (1)

Publication Number Publication Date
WO2024019681A1 true WO2024019681A1 (fr) 2024-01-25

Family

ID=84603418

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2023/050309 WO2024019681A1 (fr) 2022-07-21 2023-03-31 Ensemble piston permettant de réaliser un amortissement secondaire

Country Status (2)

Country Link
TR (1) TR2022011664A2 (fr)
WO (1) WO2024019681A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984321A (en) * 1959-11-20 1961-05-16 Gen Motors Corp Hydraulic shock absorber with compression cut-off
US20150330475A1 (en) * 2014-05-14 2015-11-19 Beijing West Industries, Co., Ltd. Hydraulic damper with a hydraulic stop arrangement
US20210088096A1 (en) * 2019-09-23 2021-03-25 DRiV Automotive Inc. Shock Absorber Base Valve Assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984321A (en) * 1959-11-20 1961-05-16 Gen Motors Corp Hydraulic shock absorber with compression cut-off
US20150330475A1 (en) * 2014-05-14 2015-11-19 Beijing West Industries, Co., Ltd. Hydraulic damper with a hydraulic stop arrangement
US20210088096A1 (en) * 2019-09-23 2021-03-25 DRiV Automotive Inc. Shock Absorber Base Valve Assembly

Also Published As

Publication number Publication date
TR2022011664A2 (tr) 2022-09-21

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