EP3631232A1 - Air spring - Google Patents
Air springInfo
- Publication number
- EP3631232A1 EP3631232A1 EP18711028.3A EP18711028A EP3631232A1 EP 3631232 A1 EP3631232 A1 EP 3631232A1 EP 18711028 A EP18711028 A EP 18711028A EP 3631232 A1 EP3631232 A1 EP 3631232A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- bellows
- seat
- bead
- rolling piston
- 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- Withdrawn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
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
- F16F9/0454—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 characterised by the assembling method or by the mounting arrangement, e.g. mounting of the membrane
-
- 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
-
- 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
- F16F2226/00—Manufacturing; Treatments
- F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
-
- 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
- F16F2226/00—Manufacturing; Treatments
- F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
- F16F2226/045—Press-fitting
-
- 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
- F16F2230/0041—Locking; Fixing in position
Definitions
- the invention relates to an air spring, comprising
- a rolling bellows having an opening having a bead reinforced by a core
- a rolling piston with a seat for the rolling bellows, and a support shoulder for the rolling bellows
- the rolling bellows in the assembled state with its end associated with the rolling piston by means of a clamping fit between the bead and the seat of the rolling piston is connected airtight with the rolling piston and the bead of the rolling bellows is at least partially supported on the support shoulder, wherein the rolling piston constructed of a thermoplastic material is.
- DE EE 10 2008 055 511 AI shows a rolling piston, which has a cone-shaped seat for the rolling bellows. To avoid slipping, the conical seat on a retaining lug, which makes it difficult to slip.
- the invention has for its object to improve an air spring of the type described in such a way that a high level of security against slippage of the bellows from the piston, in particular with regard to the use of plastic as a piston material in a simple manner can be realized.
- the rolling piston on the seat for the Abrollbalg has an axially projecting, substantially cylindrical locking ring which protrudes axially after the assembly of the Abrollbalges on the seat on the bead of the Abrollbalges out, is plastifiable by at least partial heating and by a Umformstkovs in the plasticized state radially outward over the bead of the
- Abrollbalges is deformable such that the bead is at least partially encompassed by the deformed locking ring.
- the plastic deformation is stable after cooling and prevents the
- the forming die has a concave radially outwardly curved in its substantially conical region Forming on, wherein a first, small diameter of the concave outwardly curved forming area in the undeformed locking ring of the seat of the
- Rolling piston fits. In this way, the locking ring is deformable around the bead of the Abrollbalges around that a particularly high security against slipping is given.
- the securing ring in the plasticized state can be deformed around the bead of the rolling bellows in such a way that the bead can be pressed against the support shoulder of the rolling piston.
- the invention further relates to a method for producing an initially described air spring, wherein the air spring
- a rolling bellows having an opening, which is reinforced by a core
- a rolling piston having a seat for the rolling bellows and a support shoulder for the rolling bellows
- the seat of the rolling piston has an axially projecting, substantially cylindrical locking ring which protrudes axially after the assembly of the rolling bellows on the seat beyond the bead of the rolling bellows out, and the rolling piston of a
- thermoplastic plastic material is constructed.
- the invention is therefore an object of the invention to provide a method for producing an air spring of the type described, which allows a simple and secure connection of the Abrollbalges with the rolling piston.
- Rolling piston wherein the forming die has at least one substantially conical region whose first, smaller diameter fits into the seat of the rolling piston and the second diameter is greater than the first diameter
- the forming die in its substantially conical region has a concave radially outwardly curved circumferentially
- Rolling piston fits, which pressed during pressing of the forming die of the locking ring (8) of the rolling piston not only outwardly, but is deformed around the bead of the roll-off around in accordance with the curvature of the forming die.
- the retaining ring is so formed around the bead of the Abrollbalges around that a particularly high security against slipping is given.
- Fig. 1 is a rolling bellows and a rolling piston in the assembled position as
- Fig. 4 is a fully assembled air spring.
- Fig. 1 shows a rolling bellows 1 with a bead 2.
- the bead 2 has a circumferentially embedded strength member 3.
- a rolling piston 4 has a partially conically shaped seat 5 with an inner diameter 6.
- a support shoulder 7 is used in finished air spring the better unwinding of the Abrollbalges 1 on the rolling piston 4.
- the seat 5 has an axially to the seat 5 adjoining and integral with the seat 5 securing ring 8.
- the rolling bellows 1 is attached with its bead 2 on the seat 5.
- the locking ring 8 protrudes beyond the bead 2 by a predetermined amount.
- a combination heating-forming punch 9 is inserted into the Abrollbalg 1.
- the combination heating-forming punch 9 has a radiant heater 10 and a
- Forming tool 11 on.
- the forming tool 11 has an at least partially conically shaped, radially outwardly curved forming region 12.
- a first diameter 13 of the forming tool 11 corresponds to the inner
- the circlip 8 is deformed by the circumferentially concave radially outwardly curved forming region 12 and engages
- Fig. 4 shows the finished composite of unwinding bellows 1 and rolling piston 4. After cooling and consequent solidification of the deformed locking ring 8 of the rolling bellows 1 is inextricably linked to the rolling piston 4. Due to the deformed locking ring 8, the bead 2 is pressed axially against the rolling piston 4 on. This increases the safety of airtightness.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Diaphragms And Bellows (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017209199.1A DE102017209199A1 (en) | 2017-05-31 | 2017-05-31 | air spring |
PCT/EP2018/055003 WO2018219508A1 (en) | 2017-05-31 | 2018-03-01 | Air spring |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3631232A1 true EP3631232A1 (en) | 2020-04-08 |
Family
ID=61628303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18711028.3A Withdrawn EP3631232A1 (en) | 2017-05-31 | 2018-03-01 | Air spring |
Country Status (4)
Country | Link |
---|---|
US (1) | US11255397B2 (en) |
EP (1) | EP3631232A1 (en) |
DE (1) | DE102017209199A1 (en) |
WO (1) | WO2018219508A1 (en) |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4230249C2 (en) | 1992-09-10 | 1995-11-23 | Continental Ag | Air spring for vehicles with an elastomeric bellows and a rolling piston |
US6746004B2 (en) * | 2001-12-05 | 2004-06-08 | Bfs Diversified Products, Llc | Vehicle air spring assembly |
DE10354574B3 (en) | 2003-11-21 | 2005-01-27 | Contitech Luftfedersysteme Gmbh | Pneumatic spring with seamless hose roll bellows for suspension has fixing region with two trapezoid projections |
DE102004030335A1 (en) * | 2004-06-23 | 2006-01-19 | Contitech Luftfedersysteme Gmbh | Air spring with a rolling piston and a rolling bellows with at least one vulcanized fastening part |
DE102007055077A1 (en) | 2007-11-16 | 2009-05-20 | Continental Aktiengesellschaft | Clamping contour for a pressurizable component and clamping means therefor |
DE102008055511A1 (en) | 2008-12-11 | 2010-06-17 | Contitech Luftfedersysteme Gmbh | Air spring for commercial vehicle such as towing vehicle or trailers, has rolling piston made up of plastic and bellow made up of elastomeric material, where bellow has fastening bead with bead core at its end facing rolling piston |
DE102010036972A1 (en) | 2010-08-13 | 2012-02-16 | Contitech Luftfedersysteme Gmbh | Trigger guard for air bag |
US8733743B2 (en) | 2010-12-23 | 2014-05-27 | Firestone Industrial Products Company, Llc | Gas spring piston, gas spring assembly and method |
DE102011055351A1 (en) | 2011-11-15 | 2013-05-16 | Contitech Luftfedersysteme Gmbh | Roll-off piston for an air spring bellows |
DE102012100753A1 (en) | 2012-01-31 | 2013-08-01 | Contitech Luftfedersysteme Gmbh | Rolling piston for use as hollow plunger piston for air bellows and air spring device of vehicle such as truck, has safety- or retaining ring with straps or beadings locked with sections of rolling piston by permanent mechanical deformation |
DE102012104964A1 (en) | 2012-06-08 | 2013-12-12 | Contitech Luftfedersysteme Gmbh | Rolling piston for a Luftfederrollbalg |
EP2775162B1 (en) | 2013-03-08 | 2019-10-30 | ContiTech USA, Inc. | Composite bead plate and an air spring using the same |
DE102013113124A1 (en) | 2013-11-27 | 2015-05-28 | Bpw Bergische Achsen Kg | Air spring for an air-suspended vehicle axle |
EP3165786B1 (en) | 2015-11-03 | 2023-08-23 | ContiTech Luftfedersysteme GmbH | Air spring piston |
DE102017202094A1 (en) * | 2017-02-09 | 2018-08-09 | Contitech Luftfedersysteme Gmbh | Air spring with a plastic lid |
-
2017
- 2017-05-31 DE DE102017209199.1A patent/DE102017209199A1/en not_active Withdrawn
-
2018
- 2018-03-01 US US16/614,850 patent/US11255397B2/en active Active
- 2018-03-01 WO PCT/EP2018/055003 patent/WO2018219508A1/en active Application Filing
- 2018-03-01 EP EP18711028.3A patent/EP3631232A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2018219508A1 (en) | 2018-12-06 |
DE102017209199A1 (en) | 2018-12-06 |
US11255397B2 (en) | 2022-02-22 |
US20210156446A1 (en) | 2021-05-27 |
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Legal Events
Date | Code | Title | Description |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20200102 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
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AX | Request for extension of the european patent |
Extension state: BA ME |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CONTITECH LUFTFEDERSYSTEME GMBH |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
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17Q | First examination report despatched |
Effective date: 20210804 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20230425 |