DE10200608A1 - Hydraulic-pneumatic or pneumatic piston-cylinder unit, especially for vibration damper or spring leg of motor vehicle, has folding bellows with air inlet and outlet opening into internal volume bounded by bellows to form directed air flow - Google Patents

Hydraulic-pneumatic or pneumatic piston-cylinder unit, especially for vibration damper or spring leg of motor vehicle, has folding bellows with air inlet and outlet opening into internal volume bounded by bellows to form directed air flow

Info

Publication number
DE10200608A1
DE10200608A1 DE2002100608 DE10200608A DE10200608A1 DE 10200608 A1 DE10200608 A1 DE 10200608A1 DE 2002100608 DE2002100608 DE 2002100608 DE 10200608 A DE10200608 A DE 10200608A DE 10200608 A1 DE10200608 A1 DE 10200608A1
Authority
DE
Germany
Prior art keywords
bellows
air
air inlet
interior
pneumatic
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Withdrawn
Application number
DE2002100608
Other languages
German (de)
Inventor
Robert Pradel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Sachs AG
Original Assignee
ZF Sachs AG
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
Priority to DE10105099 priority Critical
Application filed by ZF Sachs AG filed Critical ZF Sachs AG
Priority to DE2002100608 priority patent/DE10200608A1/en
Publication of DE10200608A1 publication Critical patent/DE10200608A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/04Springs, 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
    • F16F9/0454Springs, 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/062Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper
    • B60G15/063Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper characterised by the mounting of the spring on the damper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/08Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
    • B60G15/12Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring and fluid damper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/027Mechanical springs regulated by fluid means
    • B60G17/0272Mechanical springs regulated by fluid means the mechanical spring being a coil spring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32Details
    • F16F9/58Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J3/00Diaphragms; Bellows; Bellows pistons
    • F16J3/04Bellows
    • F16J3/041Non-metallic bellows
    • F16J3/046Lubrication or venting arrangements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30Spring/Damper and/or actuator Units
    • B60G2202/31Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
    • B60G2202/312The spring being a wound spring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30Spring/Damper and/or actuator Units
    • B60G2202/31Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
    • B60G2202/314The spring being a pneumatic spring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00Indexing codes relating to the regulated action or device
    • B60G2500/20Spring action or springs

Abstract

The bellows (9) covers the protruding section of the piston and is arranged between the end of the piston and the cylinder. The interior of the bellows undergoes a volume change as a result of the relative movement of parts and has at least one air inlet and outlet opening. The air inlet (15) and outlet (17) open into the internal volume (11) bounded by the bellows, whereby a directed air flow is formed.

Description

The invention relates to a bellows for hydraulic, hydropneumatic or pneumatic piston-cylinder units, according to the generic term of Pa Claim 1.

To protect against contamination and damage from the cylinder stepping piston rod section becomes a bellows between the axially to each other the moving parts. For example, it is from DE 196 04 558 C1 known, the interior delimited by the bellows through an opening with the Connect ambient air. This opening allows the through the Relativbe movement between a piston rod and the cylinder resulting volume changes compensation of the interior of the bellows by ventilation. A sol che volume change also causes dust, dirt through the opening and / or moisture can be sucked in. Especially with vibration dampers or struts for vehicles is due to the volume change both at An  order of a protective tube as well as that of a bellows at certain A construction situations and environmental influences a penetration and deposition of dirt in the Area of the piston rod seal not prevented with sufficient certainty. For example, in extreme vehicle operating conditions Fine dirt deposits and corrosion on the piston rod, leading to premature Wear of the piston rod seal leads. The consequence of the waning Abdich between the piston rod and the cylinder is a pressure loss in the piston Cylinder unit, which makes it suitable for hydropneumatic vibration dampers or Suspension struts for failure or at least to reduce the damping performance comes, so that the driving safety of the vehicle is greatly impaired.

The object of the present invention is to provide a bellows for piston-cylinder To create aggregates that prevent the ingress of moisture, dirt and fine dust on the piston rod section protruding from the cylinder even at extreme Operating conditions prevented.

According to the invention, this object is achieved with the characteristic features of Pa Claim 1 solved. Further advantageous refinements or embodiments men are the subject of the subclaims.

Due to the separate arrangement of the air inlet and air outlet, the interior of the bellows created a directed air flow. Clean air becomes that Interior supplied, while the air outlet can be arranged at any location can. It is advantageous if the air outlet arranged separately from the air inlet is placed in a deep place in the interior, so that possibly forming Condensate is expelled and the interior through between the air inlet let and existing air flow is dried.

There are various types of supply to the interior of the bellows with clean air Suction devices for the air intake possible. So the air intake with a lei device, which is formed, for example, by an elastic hose be, this line opens into a room with clean air. With a wide one  Ren embodiment is the intake device cooperating with the air inlet device with a filter or a fine sieve. So that air circulation in the Bellows interior arises, the air inlet is verse with a check valve hen and also the air outlet via a check valve. Self-cleaning of the filter can be created if the inlet check valve decelerates uses, so that a targeted backflow of air occurs.

In a further embodiment, the air inlet is connected to a pressure generator Active connection so that there is a constant air flow in the interior of the bellows is and the air outlet for cooling components of the vibration damper, for example the associated electronically controlled adjustment device, serves. The air outlet can also be used for forced ventilation of an installation space to counteract overheating.

The drawing shows exemplary embodiments of the bellows according to the invention Darge for piston-cylinder units using the example of struts for vehicles provides. The invention is explained in more detail below with the aid of these exemplary embodiments explained. It shows

Figure 1 is a shock absorber in which the area of the bellows in longitudinal section is Darge.

2 shows an embodiment of the air flow in the bellows, which has an air supply in the region of the upper spring plate.

3 shows a further embodiment for the air in the bellows, wherein the air inlet and the air outlet are arranged let in the bottom spring plate.

Fig. 4 shows an embodiment in which an air filter element in the region of the upper Ge steering eye is arranged on the spring plate.

The shock absorber of FIG. 1 has a container 3, axially guided in which a piston rod 1 and is sealed outwardly by a piston rod seal 19. At the lower end of the container 3 , a connecting eye is provided, which receives a ring in an articulated manner and is thus articulated on a chassis. At the upper end of the piston rod 1 there is an upper spring plate 5 and a connection eye for connecting the shock absorber to a vehicle body. A lower spring plate 7 is connected to the container 3 , a support spring designed as a helical compression spring being clamped between the upper spring plate 5 and the lower spring plate 7 . To protect the piston rod 1 against dirt, stone chips and moisture, a bellows 9 is provided which has an interior 11 and surrounds both the piston rod 1 and the suspension spring. With one end of the bellows 9 is attached to the upper spring plate 5 and at the other end to the lower spring plate 7 in a pressure-tight manner and opens into the interior 11 at least one air inlet 15 , which is in operative connection with the purest possible air and increases the volume of the interior 11 its ventilation serves. An air outlet 17 is provided at the lowest possible point in the interior 11 , so that any moisture that forms is reliably expelled. Between an inlet check valve 23 and an outlet check valve 25 , which is formed by a rubber sleeve, an air flow 13 occurs when the volume of the interior 11 changes, so that when the volume is increased, air is sucked into the interior 11 only via the air inlet 15 and when the volume is reduced the air flows out via an outlet air duct 27 and the air outlet 17 . To supply the interior space 11 with the purest possible air, the air inlet 15 is connected to a line 29 , preferably consisting of an elastic hose, which opens into a room with clean air and, if the operating conditions of the vehicle require it, additionally interacts with a filter 21 .

In the exemplary embodiment according to FIG. 2, the air inlet 15 is located in the area of the upper spring plate 5 . The air outlet 17 is net angeord in the lower spring plate 7 and carries the outlet check valve 25th The air flow 13 in the interior 11 of the bellows 9 advantageously runs over the entire axial length of the bellows 9 . At the air inlet 15 , the line 29 is fastened, which, for example, ends at the end in a room with pure air and is connected to an inlet check valve and / or to a filter. Alternatively, the line 29 can also open into a space which is brought to a higher pressure by a compressed air generator or the line is connected directly to the compressed air generator, so that there is a constant flow through the bellows 9 . The air leaving the air outlet 17 can be supplied via a corresponding line to a component of the shock absorber, a vehicle component or a space of the vehicle for cooling. In this case, no check valves for the air inlet 15 and the air outlet 17 are required.

The embodiment according to FIG. 3 differs from that according to FIG. 2 essentially in that the air inlet 15 is arranged in the lower region of the lower spring divider 7 . The air flow 13 present after the air inlet 15 runs between the upper end of the container 3 and the connection part of the spring plate 7 interrupted by ribs and is thus also guided past the piston rod seal 19 .

In FIG. 4, the filter 21 is arranged between the connecting eye attached to the end of the piston rod 1 and the upper spring plate 5 and is connected upstream of the air inlet 15 . Such an arrangement of the filter 21 is suitable for road vehicles where no heavy pollution is expected during operation. If, however, dusty air can also be sucked in at this point of installation of the filter 21 due to special conditions of use of the vehicle, then it is expedient if the outlet check valve 25 is designed such that a slight backflow through the filter 21 takes place before its opening begins and this is then blown free again.

All of the above-described exemplary embodiments have an air inlet 15 which is connected to an intake device which ensures that clean air flows into the interior 11 of the bellows 9 . The intake device can not only open into a suitable engine compartment, but can also be placed in the passenger compartment. In particular in vehicles which operate on extremely dusty or sandy slopes, for example in desert regions, it is expedient to vent the passenger compartment via the suction device and the bellows 9 .

The separate arrangement of air inlet 15 and air outlet 17 causes an air flow 13 which is able to blow out any moisture or fine dust or sand formed in the bellows 9 via the low-lying outlet check valve 25 . This applies, for example, to open off-road vehicles that are driven under extreme dust conditions and have no possibility of supplying dust-free air to the interior 11 of the bellows 9 .

Furthermore, the air emerging from the interior 11 via the air outlet 15 can be used to cool components of the shock absorber or of components or of spaces in the vehicle.

These statements show that not only good protection of the piston rod against dirt and damage, as well as a wear protection on the piston rod seal is created by the invention, but also a very great freedom of movement with regard to the arrangement of air inlet 15 and air outlet 17 for loading and Ventilation of the bellows 9 is created.

Claims (12)

1. Bellows for hydraulic, hydropneumatic or pneumatic piston-cylinder units, in particular for vibration dampers or shock absorbers for vehicles, the bellows for protection against dirt and / or damage covers the piston rod section protruding from the cylinder and between the end of the piston rod and the Cylinder is arranged and the interior of the bellows undergoes a change in volume due to the relative movement of the parts to one another, for which purpose at least one opening leading to the interior of the bellows is provided, which allows inflow and / or outflow of air, characterized in that in the bellows ( 9 ) limited interior ( 11 ) an air inlet ( 15 ) and an air outlet ( 17 ) open, whereby a directed air flow ( 13 ) is formed.
2. Bellows according to claim 1, characterized in that the air inlet ( 15 ) is in operative connection with a suction device which supplies the interior ( 11 ) of the bellows ( 9 ) with clean air.
3. Bellows according to claim 2, characterized in that the suction device cooperating with the air inlet ( 15 ) has a line ( 29 ) which opens into a room with clean air.
4. Bellows according to claim 2, characterized in that the suction device cooperating with the air inlet ( 15 ) is designed to cooperate with a filter ( 21 ) or a fine sieve.
5. Bellows according to one or more of claims 1 to 4, characterized in that a check valve ( 23 ) cooperating with the air inlet ( 15 ) is arranged.
6. Bellows according to claim 5, characterized in that the check valve ( 23 ) associated with the air inlet ( 15 ) has a delayed closing insert.
7. Bellows according to one or more of claims 1 to 6, characterized in that the air inlet ( 15 ) is in operative connection with a compressed air generator.
8. Bellows according to one or more of claims 1 to 7, characterized in that the suction device cooperating with the air inlet ( 15 ) opens into an interior of the vehicle and causes an air exchange of the interior.
9. bellows according to one or more of claims 1 to 8, characterized in that the air outlet ( 17 ) is provided with a device which is arranged for cooling components of the shock absorber or other components of the vehicle.
10. Bellows according to one or more of claims 1 to 9, characterized in that a check valve ( 25 ) cooperating with the air outlet ( 17 ) is arranged.
11. Bellows according to one or more of claims 1 to 10, characterized in that the air outlet ( 17 ) has a on a seal ( 19 ) of the piston rod ( 1 ) before flowing exhaust air duct ( 27 ).
12. Bellows according to one or more of claims 1 to 11, characterized in that the air outlet ( 17 ) opens into a space and is arranged for forced ventilation of this space.
DE2002100608 2001-02-05 2002-01-10 Hydraulic-pneumatic or pneumatic piston-cylinder unit, especially for vibration damper or spring leg of motor vehicle, has folding bellows with air inlet and outlet opening into internal volume bounded by bellows to form directed air flow Withdrawn DE10200608A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10105099 2001-02-05
DE2002100608 DE10200608A1 (en) 2001-02-05 2002-01-10 Hydraulic-pneumatic or pneumatic piston-cylinder unit, especially for vibration damper or spring leg of motor vehicle, has folding bellows with air inlet and outlet opening into internal volume bounded by bellows to form directed air flow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2002100608 DE10200608A1 (en) 2001-02-05 2002-01-10 Hydraulic-pneumatic or pneumatic piston-cylinder unit, especially for vibration damper or spring leg of motor vehicle, has folding bellows with air inlet and outlet opening into internal volume bounded by bellows to form directed air flow

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Publication Number Publication Date
DE10200608A1 true DE10200608A1 (en) 2002-08-08

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DE2002100608 Withdrawn DE10200608A1 (en) 2001-02-05 2002-01-10 Hydraulic-pneumatic or pneumatic piston-cylinder unit, especially for vibration damper or spring leg of motor vehicle, has folding bellows with air inlet and outlet opening into internal volume bounded by bellows to form directed air flow

Country Status (1)

Country Link
DE (1) DE10200608A1 (en)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10306121A1 (en) * 2003-02-14 2004-09-09 Zf Sachs Ag Bellows for e.g. vehicle strut, is attached by mounting at its upper end to piston rod mounting which has vent channel allowing air to flow into and out of bellows
FR2864188A1 (en) * 2003-12-19 2005-06-24 Continental Ag McPherson type strut for motor vehicle, has spring housed in cavity forming chamber of spring and producing resultant force, under effect of non symmetric deformation of spring with respect to median axis
EP1681182A2 (en) 2005-01-14 2006-07-19 Zf Friedrichshafen Ag Spring support
US7108253B2 (en) 2004-09-03 2006-09-19 Oshkosh Truck Corporation Mounting assembly
US7343849B2 (en) 2004-09-13 2008-03-18 Smc Kabushiki Kaisha Cylinder apparatus
US7416064B2 (en) 2004-07-15 2008-08-26 Zf Friedrichshafen Ag Boot for hydraulic, hydropneumatic or pneumatic piston-cylinder units
WO2008119472A1 (en) 2007-04-03 2008-10-09 Zf Friedrichschafen Ag Protective sleeve for a piston-cylinder unit
WO2009124617A1 (en) * 2008-04-11 2009-10-15 Audi Ag Suspension strut for wheel suspensions of motor vehicles
DE102008053617A1 (en) 2008-10-29 2010-05-06 Audi Ag Suspension for motor vehicles
DE102011084684B3 (en) * 2011-10-18 2013-03-28 Zf Friedrichshafen Ag Vibration damper for vehicle bodywork, has ventilation channel including housing of terminal bearing, where housing includes center rod for elastomer body in ventilation channel that is carried out within center rod
DE102005028754B4 (en) * 2004-07-15 2013-05-29 Zf Friedrichshafen Ag Folding cover for hydraulic, hydropneumatic or pneumatic piston-cylinder units
DE102012207863A1 (en) 2012-05-11 2013-11-14 Zf Friedrichshafen Ag Piston-cylinder aggregate has ventilation unit with curved channel relative to piston rod in circumference, such that air in annular space executes rotary flow movement, when exchange of air between annular space and surrounding takes place
DE102012214954B3 (en) * 2012-08-23 2014-01-09 Zf Friedrichshafen Ag Piston rod-cylinder unit for use in vibration damper of vehicle, has ventilation channel formed between ring housing and inner space, and bearing exhibiting ring housing with filter element, where housing extends over range of bearing
CN104653683A (en) * 2013-11-22 2015-05-27 丹阳市中远车灯有限公司 Air damper
EP2052889B1 (en) 2007-10-26 2016-06-15 Strömsholmen AB Hydropneumatic spring-damping device and method of operation of a hydropneumatic spring-damping device
FR3056668A1 (en) * 2016-09-27 2018-03-30 Valeo Embrayages CONTROL DEVICE, ESPECIALLY OF HYDRAULIC CLUTCH OR BRAKE CONTROL, INTENDED FOR INTEGRATING IN A MOTOR VEHICLE
WO2019042718A1 (en) 2017-09-01 2019-03-07 Thyssenkrupp Bilstein Gmbh Filter device and fixing means comprising a filter device of this type
DE102017223591A1 (en) * 2017-12-21 2019-06-27 Volkswagen Aktiengesellschaft Axle damper for a motor vehicle and motor vehicle with at least one axle damper
WO2019162017A1 (en) * 2018-02-26 2019-08-29 Zf Friedrichshafen Ag Adjustable spring support

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10306121A1 (en) * 2003-02-14 2004-09-09 Zf Sachs Ag Bellows for e.g. vehicle strut, is attached by mounting at its upper end to piston rod mounting which has vent channel allowing air to flow into and out of bellows
US7823709B2 (en) 2003-02-14 2010-11-02 Zf Sachs Ag Bellows for hydraulic, hydropneumatic, or pneumatic piston-cylinder units
DE10306121B4 (en) * 2003-02-14 2009-06-04 Zf Sachs Ag Bellows for a bellows for hydraulic, hydropneumatic or pneumatic piston-cylinder units
FR2864188A1 (en) * 2003-12-19 2005-06-24 Continental Ag McPherson type strut for motor vehicle, has spring housed in cavity forming chamber of spring and producing resultant force, under effect of non symmetric deformation of spring with respect to median axis
DE102005028754B4 (en) * 2004-07-15 2013-05-29 Zf Friedrichshafen Ag Folding cover for hydraulic, hydropneumatic or pneumatic piston-cylinder units
US7416064B2 (en) 2004-07-15 2008-08-26 Zf Friedrichshafen Ag Boot for hydraulic, hydropneumatic or pneumatic piston-cylinder units
US7108253B2 (en) 2004-09-03 2006-09-19 Oshkosh Truck Corporation Mounting assembly
US7343849B2 (en) 2004-09-13 2008-03-18 Smc Kabushiki Kaisha Cylinder apparatus
DE102005043175B8 (en) * 2004-09-13 2010-03-04 Smc K.K. cylinder device
DE102005043175B4 (en) * 2004-09-13 2009-11-19 Smc K.K. cylinder device
DE102005001739B4 (en) * 2005-01-14 2006-10-26 Zf Friedrichshafen Ag Spring support
EP1681182A3 (en) * 2005-01-14 2009-04-01 Zf Friedrichshafen Ag Spring support
DE102005001739A1 (en) * 2005-01-14 2006-07-27 Zf Friedrichshafen Ag Spring support
EP1681182A2 (en) 2005-01-14 2006-07-19 Zf Friedrichshafen Ag Spring support
DE102007015860A1 (en) 2007-04-03 2008-10-09 Zf Friedrichshafen Ag Protective cover for a piston-cylinder unit
WO2008119472A1 (en) 2007-04-03 2008-10-09 Zf Friedrichschafen Ag Protective sleeve for a piston-cylinder unit
EP2052889B1 (en) 2007-10-26 2016-06-15 Strömsholmen AB Hydropneumatic spring-damping device and method of operation of a hydropneumatic spring-damping device
WO2009124617A1 (en) * 2008-04-11 2009-10-15 Audi Ag Suspension strut for wheel suspensions of motor vehicles
US8454029B2 (en) 2008-10-29 2013-06-04 Audi Ag Wheel suspension for motor vehicles
DE102008053617A1 (en) 2008-10-29 2010-05-06 Audi Ag Suspension for motor vehicles
DE102011084684B3 (en) * 2011-10-18 2013-03-28 Zf Friedrichshafen Ag Vibration damper for vehicle bodywork, has ventilation channel including housing of terminal bearing, where housing includes center rod for elastomer body in ventilation channel that is carried out within center rod
DE102012207863A1 (en) 2012-05-11 2013-11-14 Zf Friedrichshafen Ag Piston-cylinder aggregate has ventilation unit with curved channel relative to piston rod in circumference, such that air in annular space executes rotary flow movement, when exchange of air between annular space and surrounding takes place
DE102012207863B4 (en) * 2012-05-11 2015-07-16 Zf Friedrichshafen Ag Piston-cylinder unit with a piston rod protection
DE102012214954B3 (en) * 2012-08-23 2014-01-09 Zf Friedrichshafen Ag Piston rod-cylinder unit for use in vibration damper of vehicle, has ventilation channel formed between ring housing and inner space, and bearing exhibiting ring housing with filter element, where housing extends over range of bearing
CN104653683A (en) * 2013-11-22 2015-05-27 丹阳市中远车灯有限公司 Air damper
FR3056668A1 (en) * 2016-09-27 2018-03-30 Valeo Embrayages CONTROL DEVICE, ESPECIALLY OF HYDRAULIC CLUTCH OR BRAKE CONTROL, INTENDED FOR INTEGRATING IN A MOTOR VEHICLE
WO2019042718A1 (en) 2017-09-01 2019-03-07 Thyssenkrupp Bilstein Gmbh Filter device and fixing means comprising a filter device of this type
DE102017120172A1 (en) 2017-09-01 2019-03-07 Thyssenkrupp Ag Filter device and fastening means with such a filter device
DE102017223591A1 (en) * 2017-12-21 2019-06-27 Volkswagen Aktiengesellschaft Axle damper for a motor vehicle and motor vehicle with at least one axle damper
WO2019162017A1 (en) * 2018-02-26 2019-08-29 Zf Friedrichshafen Ag Adjustable spring support

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