EP2185834A1 - Plunger piston - Google Patents
Plunger pistonInfo
- Publication number
- EP2185834A1 EP2185834A1 EP08785036A EP08785036A EP2185834A1 EP 2185834 A1 EP2185834 A1 EP 2185834A1 EP 08785036 A EP08785036 A EP 08785036A EP 08785036 A EP08785036 A EP 08785036A EP 2185834 A1 EP2185834 A1 EP 2185834A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plunger according
- plunger
- stiffening elements
- edge
- connecting edge
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
- 230000007704 transition Effects 0.000 claims description 20
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
- F16F9/05—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type
- F16F9/057—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type characterised by the piston
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/014—Constructional features of suspension elements, e.g. arms, dampers, springs with reinforcing nerves or branches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/42—Springs
- B60G2206/424—Plunger or top retainer construction for bellows or rolling lobe type air springs
Definitions
- the invention relates to a plunger for an air spring, which is formed as a hollow body and having a bottom to which a peripheral shell part is directly or indirectly coupled, and at its, the bottom facing away from the cover area a connecting edge for a bellows and at least one air passage - Has opening.
- the hollow body is formed by two circumferential walls, wherein an inner circumferential wall is arranged concentrically to an outer circumferential wall.
- the two circumferential walls are supported by stiffening ribs against each other.
- the inner circumferential wall encloses an air passage opening in the lid region of the plunger.
- the air passage opening is bounded by an edge to which a bellows can be attached.
- the bottom area of the plunger can be closed with a plate.
- the plate is integrally connected to the lower edges of the circumferential walls, for example glued.
- the circumferential inner wall is provided with air passage openings which are the individual Connect volume areas of the hollow body together. In the case of rapid load changes, unwanted air vibrations may occur in the area of these air passage openings.
- the inner circumferential wall takes up space and thus limits the available air volume of the hollow body.
- the hollow body has a cup-shaped lower part, which forms the bottom and the shell part, that is placed on the lower part of a shell and airtight connected to the lower part, and that the upper part has the connecting edge.
- the pot-shaped lower part is easy to manufacture and forms the lower airtight seal of the hollow body.
- the upper part can be placed cover-like, so that the hollow body specific cavity is limited.
- the upper part forms with its connecting edge the coupling point for the bellows.
- the introduction of force from the upper part into the lower part can be controlled via the design of the upper part.
- the casing part has a cylindrical region which merges into a cylindrical lateral wall of the upper part which extends around the same diameter.
- the merging cylindrical areas of the upper part and lower part can form the investment and rolling surface for the bellows.
- kit-like design of the plunger can also be achieved within the scope of the invention if a standardized interface is created between the lower part and the upper part.
- An airtight in connection of the lower part with the upper part can be achieved in a simple manner in that the lower part and the upper part each have a circumferential edge, and that the upper part are joined to the lower part at the edges by means of a sealed connection to each other.
- the lower part and / or the upper part are stiffened by means of stiffening elements.
- the stiffening elements of the lower part may be formed as ribs, which are integrally formed on the shell part and extending in the radial direction.
- the structural design of the upper part results in a stable construction in that the stiffening elements of the upper part are integrally formed on the connecting edge and protrude into the air passage area surrounded by the connecting edge, and that at least a part of the stiffening elements at their, the connecting edge Abgewandten area are connected to a stiffening part. With this construction, the radially acting clamping forces of the bellows can be safely absorbed and removed.
- a further stiffening of the plunger can be achieved in that at least a portion of the stiffening elements of the cover part carry a support member which is supported on a counter-support part of the lower part.
- a conceivable inventive alternative is such that the stiffening elements of the lower part and the upper part are at least partially supported against each other.
- the power dissipation is favored by the upper part in the lower part.
- One possible embodiment of the invention is such that the cover-like upper part encloses a partial cavity, which is combined with the part cavity formed by the lower part to form an overall cavity, wherein the part cavities are in air-conducting connection.
- the lower part and the upper part are preferably formed as plastic injection-molded parts.
- the upper part has, subsequent to the cylindrical circumferential side wall, a convex rounding transition, which carries a transition section, that the transition section is inclined in the direction of the lower part, and the annular section is connected to the transition section via a concave rounding transition Connecting edge connects, then there is a transition region between the side wall and the connecting edge, which deflects the bellows voltage optimized.
- the bottom of the lower part has a reinforcing element, which is coupled to the ground or embedded in the ground, for example in the plastic injection molding process.
- the reinforcing element at least partially stiffens the floor.
- the power transmission is improved to a connected axle or body part.
- the reinforcing element is designed as a plate or as a ring, wherein the plate plane or ring plane is aligned in the direction of the ground plane.
- the lower part can be manufactured cost-optimized composite component of two different materials.
- FIG. 1 shows a perspective exploded view of a plunger with a lower part and a top
- Figure 2 the plunger according to Figure 1 in an assembled view as well as in side view and in section, and
- Figure 3 the plunger according to Figures 1 and 2 in a perspective sectional view.
- the lower part 10 has a bottom 12, to which a circumferential casing part 11 is integrally formed. Furthermore, a fastening receptacle 13 is formed centrally on the bottom 12.
- the fastening receptacle 13 encloses a receiving space in which a fastening element, for example a nut, can be inserted.
- the cylindrical fastening receptacle 13 merges into a counter-supporting part 14, which is likewise centrally shaped.
- the counter-support part 14 encloses a receiving area.
- a fastening screw which is screwed into the nut of the mounting receptacle 13, with its thread in the counter support member 14 place.
- the circumferential, cylindrical shell part 11 has a peripheral edge 15. This edge 15 is formed by a step-like cross-sectional taper of the shell part 11.
- stiffening elements 16 are arranged in the space enclosed by the lower part 10 in the space enclosed by the lower part 10 in the space enclosed by the lower part 10 stiffening elements 16 are arranged.
- the stiffening elements 16 are formed as ribs. They extend from the casing part 11 radially inwards. They are connected to the fastening receptacle 13, the shell part 11 and the bottom 12 in one piece. As FIG. 1 illustrates, a part of the stiffening elements 16 is formed only on the fastening receptacle 13, another part of the stiffening elements 16 on the fastening receptacle 13 and the counter-support part 14. These different stiffening elements 16 are always arranged alternately.
- the lower part 10 is designed as an injection molded part. It is designed without an undercut in the direction of its central longitudinal axis (see dashed line in FIG. 2) so that it can be demolded in this direction without the need for a slider tool
- the upper part 20 has a peripheral edge 21. This is offset as well as the edge 15 of the lower part 10 and step-shaped ..
- a cylindrical circumferential side wall 22 connects.
- the side wall merges via a convex rounding transition 23 into a transition section 24.
- the transition section 24 is inclined in the direction of the lower part 10.
- the transition section 24 terminates in a concave rounding transition 25.
- a connecting edge 26 integrally connects.
- the connecting edge 26 is annular.
- the connecting edge 26 terminates with a bead 27 and surrounds an air passage area.
- stiffening elements 28 are integrally formed on the connecting edge 26. These extend radially inward.
- the upper part 20 is formed as well as the lower part 10 as an injection molded part.
- the demolding takes place long ago the center longitudinal axis shown in Figure 2 (dashed line).
- the upper part 20 is constructed in this direction without undercut, so that it can be removed from the mold in a tool without a slider.
- the circumferential distribution of the stiffening elements 28, 16 of the upper part 20 and the lower part 10 are adapted to each other and arranged spaced apart in the same pitch. Thus, the stiffening elements 28, 16 of the upper part 20 and lower part 10 are aligned. As FIGS. 2 and 3 show, the stiffening elements 28 of the upper part 20 rest on the stiffening elements 16 of the lower part 10, so that a load transfer is possible.
- the upper part 20 is placed with its edge 21 on the edge 15 of the lower part 10.
- the side wall 22 and the shell part 11 merge without a shoulder.
- the edges 15 and 21 each form abutting abutment surfaces 15.1 and 21.1, so that a defined and limited Joining movement is achieved.
- a suitable connection technique is used, which allows an airtight termination.
- a material connection in particular an adhesive connection, a welded connection or the like may be used.
- the support part 29.2 rests against the counter-support part 14 in the assembled state of the upper part 20 and the lower part 10.
- the support member 29.2 includes the counter-support member 14 and fixed it laterally.
- the wall is elements 29.1 on top of the counter-support member 14
- the bellows 30 only shown on the left side of the plunger.
- the bellows 30 is arranged circumferentially in a known manner.
- the bellows 30 has a fastening ring
- the bellows 30 is continuously deflected following its mounting ring 31 via the rounding transitions 23 and 25 of the upper part 20 and guided laterally along the side wall 22 and along the shell part 11.
- the cylinder region formed by the side wall 22 and the shell part 11 creates a contact and rolling surface for the bellows 30.
- the cavity enclosed by the bellows 30 communicates with the hollow space of the hollow body composed of the upper part 20 and the lower part 10 in spatial connection. This spatial connection is created by means of the air passage opening in 27.1 in the region of the end edge 26.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Diaphragms And Bellows (AREA)
- Fluid-Damping Devices (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007035640A DE102007035640A1 (en) | 2007-07-27 | 2007-07-27 | plunger |
PCT/EP2008/006083 WO2009015821A1 (en) | 2007-07-27 | 2008-07-24 | Plunger piston |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2185834A1 true EP2185834A1 (en) | 2010-05-19 |
Family
ID=39917121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08785036A Withdrawn EP2185834A1 (en) | 2007-07-27 | 2008-07-24 | Plunger piston |
Country Status (4)
Country | Link |
---|---|
US (1) | US20100127438A1 (en) |
EP (1) | EP2185834A1 (en) |
DE (1) | DE102007035640A1 (en) |
WO (1) | WO2009015821A1 (en) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8186657B2 (en) | 2007-09-06 | 2012-05-29 | Firestone Industrial Products Company, Llc | Air spring modular piston |
CN106442984B (en) | 2010-04-21 | 2020-03-13 | 米密德诊断学有限公司 | Markers and determinants for distinguishing bacterial from viral infections and methods of use thereof |
WO2012100003A1 (en) * | 2011-01-18 | 2012-07-26 | Firestone Industrial Products Company, Llc | Gas spring piston as well as gas spring assembly and suspension system including same |
DE102011050103A1 (en) * | 2011-05-04 | 2012-11-08 | Contitech Luftfedersysteme Gmbh | Rolling piston for a Luftfederrollbalg |
DE102011051237A1 (en) | 2011-06-21 | 2012-12-27 | Contitech Luftfedersysteme Gmbh | Rolling piston for a Luftfederrollbalg |
US9212717B2 (en) | 2011-06-30 | 2015-12-15 | Firestone Industrial Products Company LLC | Gas spring end member as well as gas spring assembly including same |
DE102011054330A1 (en) | 2011-10-10 | 2013-04-11 | Contitech Luftfedersysteme Gmbh | Roll-off piston for an air spring bellows |
EP3882633A1 (en) | 2012-02-09 | 2021-09-22 | MeMed Diagnostics Ltd. | Signatures and determinants for diagnosing infections and methods of use thereof |
DE102012103358A1 (en) | 2012-04-18 | 2013-10-24 | Contitech Luftfedersysteme Gmbh | Rolling piston for a Luftfederrollbalg |
CN104520161B (en) * | 2012-07-09 | 2017-08-15 | 火石工业产品有限责任公司 | End member for track spring assembly and the suspension system including the component |
EP2690306B1 (en) | 2012-07-25 | 2015-09-16 | Vibracoustic CV Air Springs GmbH | Pneumatic springs |
DE102012015032B4 (en) | 2012-07-31 | 2022-09-29 | Man Truck & Bus Se | Rolling piston for a gas spring system of vehicles |
DE102012107999B4 (en) * | 2012-08-29 | 2016-06-02 | Vibracoustic Cv Air Springs Gmbh | connecting element |
DE202012104483U1 (en) | 2012-11-20 | 2012-12-10 | Contitech Luftfedersysteme Gmbh | Multi-part rolling piston for a Luftfederrollbalg |
DE102013113737A1 (en) | 2013-12-10 | 2015-06-11 | Trelleborgvibracoustic Gmbh | Air suspension component |
CN106573516B (en) * | 2014-07-21 | 2019-05-31 | 火石工业产品有限责任公司 | Hold component assembly and gas spring assembly and the suspension system including this end component assembly and gas spring assembly |
US10303846B2 (en) | 2014-08-14 | 2019-05-28 | Memed Diagnostics Ltd. | Computational analysis of biological data using manifold and a hyperplane |
WO2016059636A1 (en) | 2014-10-14 | 2016-04-21 | Memed Diagnostics Ltd. | Signatures and determinants for diagnosing infections in non-human subjects and methods of use thereof |
US10125840B2 (en) | 2014-10-17 | 2018-11-13 | Continental Automotive Systems, Inc. | Air spring hybrid piston assembly |
EP3227132B1 (en) * | 2014-12-04 | 2021-06-02 | Firestone Industrial Products Company, LLC | Piston design with increased lateral strength |
DE102015100281A1 (en) | 2015-01-09 | 2016-07-14 | Trelleborgvibracoustic Gmbh | Composite component and air spring component with such a composite component |
EP3303022B1 (en) * | 2015-06-01 | 2020-06-17 | Firestone Industrial Products Company, LLC | End member assemblies and gas spring assemblies including same |
WO2017004472A1 (en) * | 2015-07-01 | 2017-01-05 | Firestone Industrial Products Company, Llc | Clamping plate and gas spring assemblies as well as suspension systems and methods including same |
DE102015218100A1 (en) | 2015-09-21 | 2017-03-23 | Contitech Luftfedersysteme Gmbh | roll-off |
US11466331B2 (en) | 2016-03-03 | 2022-10-11 | Memed Diagnostics Ltd. | RNA determinants for distinguishing between bacterial and viral infections |
CN109804245B (en) | 2016-07-10 | 2022-10-25 | 米密德诊断学有限公司 | Early diagnosis of infection |
EP3482200B1 (en) | 2016-07-10 | 2022-05-04 | Memed Diagnostics Ltd. | Protein signatures for distinguishing between bacterial and viral infections |
EP3519833A4 (en) | 2016-09-29 | 2020-06-03 | MeMed Diagnostics Ltd. | Methods of prognosis and treatment |
US11353456B2 (en) | 2016-09-29 | 2022-06-07 | Memed Diagnostics Ltd. | Methods of risk assessment and disease classification for appendicitis |
EP3853496A1 (en) * | 2018-09-18 | 2021-07-28 | Firestone Industrial Products Company, LLC | End member assemblies and gas spring assemblies including same |
FR3086579B1 (en) * | 2018-10-02 | 2021-04-09 | Renault Sas | SPRING SUPPORT PIECE AND SET INCLUDING A SUPPORT CUP AND SUCH SUPPORT PIECE |
DE102020001798A1 (en) | 2020-03-18 | 2021-09-23 | Man Truck & Bus Se | Air spring unrolling piston |
DE102021212667A1 (en) * | 2021-11-10 | 2023-05-11 | Contitech Luftfedersysteme Gmbh | rolling piston |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB854823A (en) * | 1957-04-24 | 1960-11-23 | Dunlop Rubber Co | Flexible diaphragm assembly |
GB811328A (en) * | 1959-02-06 | 1959-04-02 | Dunlop Rubber Co | Bellows device for fluid pressure |
US3037765A (en) * | 1961-01-10 | 1962-06-05 | Gen Motors Corp | Vacuum spring assembly |
US5382006A (en) * | 1993-09-29 | 1995-01-17 | The Goodyear Tire & Rubber Company | Airspring piston and airspring assembly |
US5535994A (en) * | 1993-11-30 | 1996-07-16 | The Goodyear Tire & Rubber Company | Composite air spring piston |
US5671907A (en) * | 1995-12-07 | 1997-09-30 | The Goodyear Tire & Rubber Company | Method of attachment of flexible member to stamped steel piston |
DE29619081U1 (en) * | 1996-11-04 | 1997-01-09 | Contitech Luftfedersyst Gmbh | Bellows air spring |
CA2229629C (en) * | 1997-03-13 | 2007-08-14 | The Goodyear Tire & Rubber Company | High modulus belt composition and belts made therewith |
DE19758726B4 (en) * | 1997-03-15 | 2006-07-20 | Bpw Bergische Achsen Kg | Air spring for air suspension axles |
DE19720776A1 (en) * | 1997-05-17 | 1998-11-19 | Bpw Bergische Achsen Kg | Commercial vehicle air spring |
DE19959839A1 (en) * | 1998-12-14 | 2000-07-06 | Mannesmann Sachs Ag | Pneumatic spring with vibration damper for motor vehicle has connecting bearing installed in region of generated surface of cylinder tube and is circular in construction and equipped with sealing ring sealing off spring chamber |
US6250613B1 (en) * | 1999-03-30 | 2001-06-26 | Bridgestone/Firestone, Inc. | Non-metallic spacer for air spring assembly |
WO2001004509A1 (en) * | 1999-07-07 | 2001-01-18 | Phoenix Ag | Pneumatic spring system |
US6386524B1 (en) | 2000-02-15 | 2002-05-14 | Bfs Diversified Products, Llc | Pedestal mounted full reservoir air spring piston |
DE10149057B4 (en) * | 2001-10-05 | 2021-05-12 | Bpw Bergische Achsen Kg | Plunger for an air spring |
DE10242436A1 (en) * | 2002-09-11 | 2004-04-01 | Bpw Bergische Achsen Kg | Plunger for an air spring |
US7500659B2 (en) * | 2005-04-07 | 2009-03-10 | Bfs Diversified Products, Llc | Air spring assembly and method |
WO2007104671A1 (en) * | 2006-03-10 | 2007-09-20 | Trelleborg Automotive Uk Ltd. | Air spring with improved piston |
ITTO20060083U1 (en) * | 2006-05-31 | 2007-12-01 | Gomma C F Spa | PISTON OF AN AIR SPRING FOR A ASSEMBLED MOTOR VEHICLE |
JP2007321936A (en) | 2006-06-05 | 2007-12-13 | Fukoku Co Ltd | Air spring |
-
2007
- 2007-07-27 DE DE102007035640A patent/DE102007035640A1/en not_active Ceased
-
2008
- 2008-07-24 US US12/452,885 patent/US20100127438A1/en not_active Abandoned
- 2008-07-24 EP EP08785036A patent/EP2185834A1/en not_active Withdrawn
- 2008-07-24 WO PCT/EP2008/006083 patent/WO2009015821A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2009015821A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102007035640A1 (en) | 2009-01-29 |
WO2009015821A1 (en) | 2009-02-05 |
US20100127438A1 (en) | 2010-05-27 |
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Legal Events
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