WO2014079430A1 - Kolben-zylinder-einheit - Google Patents
Kolben-zylinder-einheit Download PDFInfo
- Publication number
- WO2014079430A1 WO2014079430A1 PCT/DE2013/200252 DE2013200252W WO2014079430A1 WO 2014079430 A1 WO2014079430 A1 WO 2014079430A1 DE 2013200252 W DE2013200252 W DE 2013200252W WO 2014079430 A1 WO2014079430 A1 WO 2014079430A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- cylinder
- piston rod
- limiting element
- cylinder unit
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
- F16D25/088—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members being distinctly separate from the axis of rotation
Definitions
- the invention relates to a piston-cylinder unit, comprising a cylinder housing and a piston rigidly connected to a piston rod, which is axially displaceable in the cylinder housing along a cylinder longitudinal axis and pivotable together with the piston rod with respect to the cylinder longitudinal axis by a pivot angle, and an the end remote from the piston rod acting on the piston return spring and arranged between the piston and / or the piston rod and an inner wall of the cylinder housing sealing element.
- Generic piston-cylinder units are used for example in a hydraulic line for clutch actuation of a motor vehicle.
- two hydraulic cylinders are present here, which are connected to one another by means of a pressure line and forward a force introduced by an actuating pedal (pressure medium) to a clutch for actuating it.
- the hydraulic cylinder accommodating the input force represents the master cylinder and the hydraulic cylinder delivering the force to the clutch represents the slave cylinder.
- These hydraulic cylinders each have a piston which is axially displaceable within a cylinder housing of the hydraulic cylinder by means of a piston rod coupled to it.
- the rigidly interconnected or integrally designed piston and piston rod can perform a common pivoting movement about the cylinder axis.
- DE 43 31 241 B4 shows, for example, a clutch slave cylinder with a piston arranged in a cylinder housing, which carries a voltage applied to the cylinder wall seal and is axially displaceable via a relative to the cylinder housing pivotable piston rod.
- the groove having a groove for receiving a seal piston is integrally formed with the piston rod.
- the piston also carries out this pivoting movement, whereby a deformation or a tearing / lifting of the seal can take place when a specific amount of the pivoting angle is exceeded. As a result, leaks or leaks may occur.
- a piston unit which, even with inclined piston rod - relative to the cylinder axis - to exert little lateral (transverse) forces on the bore wall of the cylinder housing.
- the piston has a ball zone which is rigidly connected to the piston rod and which has a pivot plane perpendicular to the piston rod axis, with a mitverschwenkbaren to this parallel or congruent sealing plane, which is formed by sealing elements.
- the collar projection of the piston is formed in the contact region with the cylinder wall as a disk-shaped spherical zone. This results between the cylinder wall and spherical zone for the structurally defined pivoting area a circumferential contact line whose plane is always perpendicular to the cylinder axis, whereby a clamping of the piston unit is prevented.
- the object of the invention is to provide a cost effective solution to avoid exceeding a certain pivot angle of the piston rod / piston of a piston-cylinder unit with little design effort, which is also easy to retrofit.
- a piston-cylinder unit comprising a cylinder housing and a piston rigidly connected to a piston rod which is axially displaceable in the cylinder housing along a cylinder longitudinal axis and pivotable together with the piston rod with respect to the cylinder longitudinal axis by a pivoting angle, and one at the Piston rod remote from the end acting on the piston return spring and arranged between the piston and / or the piston rod and an inner wall of the cylinder housing sealing element, according to the invention, the piston and / or the piston rod a
- the limiting element is arranged on the outer circumference of the piston and / or the piston rod and can be brought into contact with the inner wall of the cylinder housing.
- the limiting element corresponding to the inner wall of the cylinder housing is arranged on the piston and / or the piston rod in a radially circumferential manner.
- the limiting element may be attached as a separate component to the piston and / or the piston rod or formed integrally with the piston and / or the piston rod.
- the limiting element is formed by a diameter extension of the piston, which is designed in a collar shape and is provided on the return spring facing the end of the piston.
- a diametrically opposite portion of the piston rod also to rest against the inner wall.
- Fig. 2 is a partial section of a piston-cylinder unit according to the invention in one
- Fig. 3 is a partial section of a piston-cylinder unit according to the invention in one
- FIGS. 1 to 3 A detail of a piston-cylinder unit is shown in schematic representation in FIGS. 1 to 3. While an embodiment of the prior art is shown in Fig. 1, Fig. 2 and Fig. 3 show the inventive design of the piston-cylinder unit.
- the piston-cylinder unit shown in Figs. 1 to 3 preferably relates to a semi-hydraulic slave cylinder (semi slave cylinder), which consists essentially of a cylinder housing 1 and a piston 2 axially displaceable therein along a cylinder longitudinal axis A, which is rigid with a Piston rod 3 is connected.
- a sealing element 4 is arranged, which seals against a pressure chamber 5.
- the sealing element 4 is located in a circumferential groove on the piston 2 2.1 and is here preferably received by a piston rod side arranged Gleitdichtring 6.
- the piston rod 3 in this case has a flange-shaped portion 3.1 formed by a diameter enlargement, on which the sliding seal 6 abuts axially.
- the entire section 3.1 is spaced from the inner wall 1 .1 of the cylinder housing 1.
- At the pressure chamber side end of the piston 2 engages formed as a compression spring return spring 7, against the restoring force of the piston 2 in a conventional manner is displaceable.
- the rigidly interconnected piston 2 and piston rod 3 are together about a pivot angle ⁇ - relative to the cylinder longitudinal axis A - pivotable.
- the partial section shown in Fig. 2 shows the piston-cylinder unit according to the invention in an initial position in which the pivoting angle ⁇ is equal to 0 °.
- a limiting element 8 is provided radially encircling, preferably is formed by a diameter extension of the piston 2.
- the limiting element 8 in the form of a spacer collar forming diameter enlargement reduces the distance from the outer circumference 2.2 of the piston 2 to the inner wall 1.1 of the cylinder housing 1.
- a gap s1 present, which is smaller than the gap s.
- FIG. 3 the piston-cylinder unit of FIG. 2 is shown after a completed pivotal movement of the piston rod 3 / the piston 2 by a pivot angle ⁇ with respect to the cylinder longitudinal axis A. (On a representation of the return spring 7 is omitted here.)
- the piston 2 reaches here with the limiting element / spacer collar 8 already after completion of a smaller pivot angle a, that is, at a pivot angle ⁇ ⁇ 9 °, on the inner wall 1 .1 of the cylinder housing 1 to the plant.
- the flanschformig radially encircling portion 3.1 of the piston rod 3 is formed so that it is also with its diametrically opposite side to rest against the inner wall 1 .1.
- the concrete design of the piston-cylinder unit according to the invention in this embodiment causes the spacer collar 8 of the piston 2 at a pivot angle ⁇ of about 8.6 ° in contact with the inner wall 1 .1 of the cylinder housing 1 occurs.
- the piston 2 and thus also the piston rod 3 can not be pivoted further.
- the sealing element 4 remains radially circumferentially to rest against the inner wall 1.1 of the cylinder housing. 1 Leaks and leaks are thus prevented.
- the limiting element 8 formed here by the spacer collar formed by means of a diameter enlargement could also be attached as a separate component to the piston 2 and / or to the piston rod 3.
- the dimensions of the limiting element / spacer collar 8 vary depending on the desired pivot angle ⁇ . LIST OF REFERENCE NUMBERS
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112013005600.3T DE112013005600A5 (de) | 2012-11-22 | 2013-10-28 | Kolben-Zylinder-Einheit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012221333 | 2012-11-22 | ||
DE102012221333.3 | 2012-11-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014079430A1 true WO2014079430A1 (de) | 2014-05-30 |
Family
ID=49779827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2013/200252 WO2014079430A1 (de) | 2012-11-22 | 2013-10-28 | Kolben-zylinder-einheit |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE112013005600A5 (de) |
WO (1) | WO2014079430A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015010055A1 (de) | 2015-08-07 | 2017-02-09 | Fte Automotive Gmbh | Hydraulikzylinder, insbesondere Nehmerzylinder für eine hydraulische Kupplungsbetätigung für Kraftfahrzeuge |
DE102021110256A1 (de) * | 2021-04-22 | 2022-10-27 | Zf Cv Systems Europe Bv | Kolben, Verdichter, Druckluftversorgungsanlage, Fahrzeug und Verfahren zum Betreiben einer Druckluftversorgungsanlage |
DE102022105641A1 (de) | 2022-03-10 | 2023-09-14 | Schaeffler Technologies AG & Co. KG | Haltevorrichtung zur Positionssicherung einer Ringdichtung an einem Kolbenelement einer Nehmervorrichtung |
DE102022133461A1 (de) | 2022-12-15 | 2024-06-20 | Schaeffler Technologies AG & Co. KG | Kolbenelement für eine Nehmervorrichtung eines hybriden oder elektrischen Fahrzeugs |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3411824A1 (de) | 1984-03-30 | 1985-10-10 | FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt | Kolbeneinheit |
DE4331241B4 (de) | 1993-09-15 | 2004-02-05 | Fte Automotive Gmbh | Hydraulischer Betätigungszylinder |
EP1512882A2 (de) * | 2003-09-05 | 2005-03-09 | FTE automotive GmbH & Co. KG | Hydraulikzylinder |
DE102008057651A1 (de) * | 2007-12-17 | 2009-06-18 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Hydraulikzylinder |
US20110247907A1 (en) * | 2008-10-09 | 2011-10-13 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Automotive Brake Cylinder Comprising a Sealing System Which Tolerates Tilts of a Rigid Brake Piston |
-
2013
- 2013-10-28 DE DE112013005600.3T patent/DE112013005600A5/de not_active Ceased
- 2013-10-28 WO PCT/DE2013/200252 patent/WO2014079430A1/de active Application Filing
- 2013-10-28 DE DE102013221845.1A patent/DE102013221845A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3411824A1 (de) | 1984-03-30 | 1985-10-10 | FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt | Kolbeneinheit |
DE4331241B4 (de) | 1993-09-15 | 2004-02-05 | Fte Automotive Gmbh | Hydraulischer Betätigungszylinder |
EP1512882A2 (de) * | 2003-09-05 | 2005-03-09 | FTE automotive GmbH & Co. KG | Hydraulikzylinder |
DE102008057651A1 (de) * | 2007-12-17 | 2009-06-18 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Hydraulikzylinder |
US20110247907A1 (en) * | 2008-10-09 | 2011-10-13 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Automotive Brake Cylinder Comprising a Sealing System Which Tolerates Tilts of a Rigid Brake Piston |
Also Published As
Publication number | Publication date |
---|---|
DE112013005600A5 (de) | 2015-10-22 |
DE102013221845A1 (de) | 2014-05-22 |
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