WO2008104147A1 - Hydraulisches element - Google Patents
Hydraulisches element Download PDFInfo
- Publication number
- WO2008104147A1 WO2008104147A1 PCT/DE2008/000240 DE2008000240W WO2008104147A1 WO 2008104147 A1 WO2008104147 A1 WO 2008104147A1 DE 2008000240 W DE2008000240 W DE 2008000240W WO 2008104147 A1 WO2008104147 A1 WO 2008104147A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic
- hydraulic element
- legs
- spring bar
- opening
- Prior art date
Links
- 229920003023 plastic Polymers 0.000 claims abstract description 9
- 239000004033 plastic Substances 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000009347 mechanical transmission Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 210000002105 tongue Anatomy 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000010008 shearing 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
- F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
- F16B21/18—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details
-
- 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
-
- 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
- F16D2025/081—Hydraulic devices that initiate movement of pistons in slave cylinders for actuating clutches, i.e. master cylinders
-
- 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
- F16D2300/00—Special features for couplings or clutches
- F16D2300/12—Mounting or assembling
Definitions
- the present invention relates to a hydraulic element according to the preamble of claim 1.
- Such hydraulic elements are e.g. Master cylinder or slave cylinder. If these have a plastic housing which encloses the pressure chamber together with a piston, a metallic threaded insert is inserted into an opening for connecting a hydraulic line and in the prior art with a wire-shaped spring which engages in an annular groove of the threaded insert and a recess of the housing, axially secured as securing means.
- the force with which the wire-forming spring presses the threaded insert into the opening and thus also the force with which sealing elements are pressed into the sealing seat like an O-ring, which influences the pressure at which the seal fails, is determined by the shear strength and Deformability of the wire form spring determined in the axial direction.
- An object of the present invention is therefore to provide a hydraulic element with an axially acting securing means which allows higher operating pressures.
- a hydraulic element of a hydraulic system for actuating a clutch in the drive train of a vehicle wherein the hydraulic element comprises a pressure chamber which is at least partially enclosed by a plastic housing and wherein a metal fitting for the hydraulic connection of the pressure chamber with a hydraulic line is arranged in an opening of the housing, wherein the connecting piece is defined by at least one axially acting securing means in the axial direction in the opening, characterized in that the axially acting securing means a lock washer with two legs, which are interconnected by a resilient spring bar , includes.
- a flat lock washer is used.
- the shear surfaces are increased with an axial force loading of the threaded insert relative to the housing, whereby the maximum axial load capacity of the compound and thus the permissible operating pressure in the pressure chamber is increased.
- a recess is arranged at the transition from at least one of the legs to the spring bar. is net, which increases the circumferential length of the spring bar. The larger circumferential length causes greater elastic deformability before plastic deformation begins.
- the legs preferably comprise centering recesses which have a clear diameter over an inner circumference.
- the length of the inner part circumference determines a clear width of a recess for mounting the lock washer.
- the spring bar preferably has a rectangular cross-section.
- the connecting piece and the opening preferably each have at least partially a polygonal, preferably hexagonal, mutually corresponding cross-section for preventing rotation against each other.
- the hydraulic element is a master or slave cylinder, wherein the connector is a threaded insert.
- a hydraulic system for actuating a clutch in the drive train of a vehicle comprising a donor and / or slave cylinder according to the invention and the use of a lock washer with two legs, which are interconnected by a resilient spring bar, for axially securing a Connecting piece of metal in a plastic housing of a master cylinder or slave cylinder.
- Fig. 1 is a schematic representation of a hydraulic system based on an embodiment of a clutch release device
- FIG. 2 shows a detail of a master cylinder with a threaded insert.
- Fig. 3 is a plan view of the threaded insert in Fig. 2;
- Fig. 4 shows a section I-I in Fig. 3;
- FIG. 5 shows the embodiment of the lock washer according to Figures 1 to 4 in the plan view.
- Fig. 6 is a plan view of the lock washer and a wire form spring according to the prior art in installation position.
- Fig. 1 shows a schematic representation of a possible embodiment of a hydraulic system 1 based on a clutch release device with a master cylinder 4 and a slave cylinder 5.
- a connecting element 2 connects a first conduit member 11 and a second conduit member 12, which together a master cylinder 4 and slave cylinder 5 connecting hydraulic line 6 form. It is understood that in other embodiments, the connecting element 2 may be arranged on the master cylinder 4 or the slave cylinder 5.
- the clutch release system actuates the clutch 7 hydraulically by acting on the master cylinder 4 by means of an actuator 14, which may be a foot pedal, an actuator, such as an electric actuator, or the like.
- an actuator 14 which may be a foot pedal, an actuator, such as an electric actuator, or the like.
- pressure is built up in the master cylinder 4 by means of a mechanical transmission 13, which builds up a pressure in the slave cylinder 5 via the pressure medium line 6 or the second line element 12, the connecting element 2 and the first line element 11.
- the slave cylinder 5 can - as in the example shown - be arranged concentrically around the transmission input shaft 10 and axially supported on a - not shown gear housing and apply the necessary disengaging force via a release bearing on the clutch 7.
- FIG. 5 may depict a slave cylinder 5, which actuates a release mechanism via a disengaging mechanism and is arranged outside the clutch bell, wherein the latter acts on the disengagement mechanism axially by means of a piston arranged in hydraulic connection with the master cylinder in the slave cylinder housing.
- a piston arranged in hydraulic connection with the master cylinder in the slave cylinder housing.
- To apply the disengagement of the slave cylinder is fixed to the housing respectively on the gear housing, which is not shown here, or attached to another housing-fixed component.
- the transmission input shaft 10 transmits the torque of the internal combustion engine 8 to an unillustrated transmission and subsequently to the drive wheels of a motor vehicle.
- the crankshaft 9 experiences, depending on the configuration of the internal combustion engine 8, for example, depending on the number of cylinders, non-uniform loads that express themselves in axial and / or tumbling oscillations of these and the release mechanism on the slave cylinder. 5 , the pressure medium line 6 are transmitted to the master cylinder 4 and from there via the mechanical transmission 13 to the actuator 14. In the case of a clutch pedal - A - as an actuator, these vibrations are perceived as unpleasant. In the case of an actuator as the actuator 14, for example, a reduced control accuracy or a shortened life can be the result of the vibrations.
- a Kribbelfilter is therefore switched on for damping in the pressure medium line 6 and tuned for damping the registered by the crankshaft 9 vibrations. The frequency range of such vibrations is typically 50 to 200 Hz.
- FIG. 2 shows a detail of a master cylinder 4, which illustrates the connection of the hydraulic line 6 and the second line element 12 of the hydraulic line 6 to the master cylinder 4.
- the hydraulic line 6 is screwed by means of a threaded nipple 15, which has an external thread 16, with a threaded insert 17 as a connecting piece, which has a female thread 18 corresponding to the external thread 16.
- a threaded insert 17 instead of a threaded insert 17, a coupling or a plug of a quick coupling may also be provided here as a connecting piece.
- sealing washers or the like may be provided on the screw.
- the threaded insert itself is made of metal, especially steel.
- the connector may also be formed of plastic, wherein advantageously plastics with corresponding mechanical properties such as high strength can be used.
- the threaded insert 17 is disposed in an opening 19 of a slave cylinder housing 20, wherein the opening 19 is connected to the pressure chamber 38 of the master cylinder 4, not shown here.
- a through hole 23 of the threaded insert connects the pressure chamber 38 with the hydraulic line 6.
- the opening 19 comprises a hexagonal area 21 in the cross section, to which a cylindrical area 22 adjoins in the direction of the pressure space.
- the threaded insert 17 has a hexagonal-shaped area 24 in the outer contour, which corresponds to the hexagonal area 21 of the opening 19, and a cylindrical area 25, the outer diameter of which corresponds to the inner diameter of the cylindrical area 22 of the opening 19.
- the axial lengths of the cylindrical Area 22 of the opening 19 and the cylindrical portion 25 of the threaded insert 17 are different.
- an O-ring 27 is arranged as a seal.
- a locking washer 28 which is shown in more detail below, which engages in a slot 30 of the slave cylinder housing 20 and an annular groove 29 of the threaded insert 17.
- the slot 30 and the Ring groove 29 are arranged so that when inserted locking washer 28, an axial compressive force is exerted on the O-ring seal 27.
- Fig. 3 shows a plan view from the direction of the hydraulic line 6 on the threaded insert 17 in Fig. 2, Fig. 4 shows a section II in Fig. 3.
- Fig. 3 and 4 show a section of the master cylinder 4 with the threaded insert 17, a Part of the hydraulic line 6, parts of the slave cylinder housing 20 and the locking washer 28.
- the threaded insert 17 has an annular groove 29 into which the locking washer 28 engages.
- the slave cylinder housing 20 has a corresponding slot 29 perpendicular to the longitudinal axis of the opening 19, so that the lock washer 28 can be inserted through the slot 30 in the annular groove 29.
- the lock washer 28 establishes a positive connection in the axial direction between the master cylinder housing 20 and the threaded insert 17.
- Fig. 5 shows the embodiment of the lock washer 28 alone.
- the view of FIG. 5 is similar to the view of FIG. 3.
- the lock washer 28 is essentially a flat disc, the z. B. is punched out of a steel strip or the like.
- the locking washer 28 includes two legs 29 which are interconnected by a spring bar 30.
- the outer contour of the two legs 36 and the spring bar 37 is circular, wherein on the spring bar 37 opposite side a recess 31 remains.
- the recess 31 serves to push the locking washer 28 in the annular groove 29 of the threaded insert 17.
- the legs 36 each include two centering recesses 32 which have a contour with a clear diameter di via an inner circumference L include, which corresponds to the outer diameter da the annular groove 29 , As can be seen from FIG.
- the legs 29 with the centering recesses 32 are thus in contact with the outer diameter da of the groove bottom of the annular groove 29.
- the recess 31 has bevels 33 on both sides as a centering aid during assembly.
- the transition of the legs 36 on the spring bar 37 has recesses 34 which increase the circumferential length U of the spring bar 3.
- the recesses 34 are thereby introduced into the legs 36, that two tongues 35 are formed, which increase the surface of the legs 36 in the circumferential direction, but at the same time increase the circumferential length of the spring bar 37.
- the spring bar 37 has a constant width B and a constant thickness D shown in FIG. 4 over its entire circumferential length.
- the cross section A see Fig.
- Fig. 6 shows a plan view of a disposed in the opening 19 of the slave cylinder housing 20 threaded insert 17.
- the internal thread 18 of the threaded insert 17 is provided with a dirt cap 39 as a transport and mounting protection.
- a wire form spring 40 according to the prior art is shown. The illustration of FIG. 6 is used solely to compare the lock washer 28 according to the invention with the wire form spring 40 according to the prior art, a common use of both is not provided.
- FIG. 6 is used solely to compare the lock washer 28 according to the invention with the wire form spring 40 according to the prior art, a common use of both is not provided.
- Fig. 6 shows a wire form spring 40 according to the prior art.
- shear lines S1 in the side view of FIG. 4, these shear surfaces
- shear line S2 of the lock washer 28 is significantly longer than the two shear lines S1 together in the wire form spring 40 according to the prior art.
- the shearing surfaces belonging to the shear lines S1 of the wire form spring 40 according to the prior art have a round cross section
- the shear surface formed with the thickness D of the lock washer 28 to the shear line S2 has a rectangular cross section.
- the shear surface of the lock washer 28 is thus significantly larger than the shear surface of the wire form spring 40 according to the prior art.
- the area moment of inertia of the cross section A of the spring bar 37 is greater than that of the round cross section of the wire form spring in this area. This reduces the deflection of the lock washer 28 over a comparable wire form spring 40 in the prior art.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112008000437T DE112008000437A5 (de) | 2007-03-01 | 2008-02-07 | Hydraulisches Element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007009967.5 | 2007-03-01 | ||
DE102007009967 | 2007-03-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008104147A1 true WO2008104147A1 (de) | 2008-09-04 |
Family
ID=39415081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2008/000240 WO2008104147A1 (de) | 2007-03-01 | 2008-02-07 | Hydraulisches element |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE112008000437A5 (de) |
WO (1) | WO2008104147A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995014879A1 (en) * | 1992-09-21 | 1995-06-01 | Proprietary Technology, Inc. | Conduit coupling |
US5853204A (en) * | 1995-07-17 | 1998-12-29 | Proprietary Technology, Inc. | Means of coupling non-threaded connections |
DE19746537A1 (de) * | 1997-10-22 | 1999-04-29 | Schaeffler Waelzlager Ohg | Nehmerzylinder mit einem aus Kunststoff hergestellten Adapter |
FR2789140A1 (fr) * | 1999-01-29 | 2000-08-04 | Valeo | Dispositif de debrayage a commande hydraulique |
EP1150032A2 (de) * | 2000-04-26 | 2001-10-31 | Nabco Limited | Kupplungsbetätigungsvorrichtung und eine Rohrkupplung mit einer Begrenzungsvorrichtung und eine Leitung für die Kupplungsbetätigungsvorrichtung |
-
2008
- 2008-02-07 WO PCT/DE2008/000240 patent/WO2008104147A1/de active Application Filing
- 2008-02-07 DE DE112008000437T patent/DE112008000437A5/de not_active Withdrawn
- 2008-02-07 DE DE102008007881A patent/DE102008007881A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995014879A1 (en) * | 1992-09-21 | 1995-06-01 | Proprietary Technology, Inc. | Conduit coupling |
US5853204A (en) * | 1995-07-17 | 1998-12-29 | Proprietary Technology, Inc. | Means of coupling non-threaded connections |
DE19746537A1 (de) * | 1997-10-22 | 1999-04-29 | Schaeffler Waelzlager Ohg | Nehmerzylinder mit einem aus Kunststoff hergestellten Adapter |
FR2789140A1 (fr) * | 1999-01-29 | 2000-08-04 | Valeo | Dispositif de debrayage a commande hydraulique |
EP1150032A2 (de) * | 2000-04-26 | 2001-10-31 | Nabco Limited | Kupplungsbetätigungsvorrichtung und eine Rohrkupplung mit einer Begrenzungsvorrichtung und eine Leitung für die Kupplungsbetätigungsvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
DE112008000437A5 (de) | 2009-12-03 |
DE102008007881A1 (de) | 2008-09-04 |
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