DE1127679B - Switching device for a gear stage of a gear change transmission that works with working medium pressure - Google Patents
Switching device for a gear stage of a gear change transmission that works with working medium pressureInfo
- Publication number
- DE1127679B DE1127679B DEA27436A DEA0027436A DE1127679B DE 1127679 B DE1127679 B DE 1127679B DE A27436 A DEA27436 A DE A27436A DE A0027436 A DEA0027436 A DE A0027436A DE 1127679 B DE1127679 B DE 1127679B
- Authority
- DE
- Germany
- Prior art keywords
- working medium
- gear
- medium pressure
- switching device
- works
- 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.)
- Pending
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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
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- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0262—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic
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- 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
- F16H—GEARING
- F16H2710/00—Control devices for speed-change mechanisms, the speed change control is dependent on function parameters of the gearing
- F16H2710/04—Control dependent on speed
- F16H2710/06—Control dependent on speed only the toothed wheels remain engaged
- F16H2710/10—Control dependent on speed only the toothed wheels remain engaged the control being hydraulic or pneumatic
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Gear-Shifting Mechanisms (AREA)
Description
Schaltvorrichtung für eine mit Arbeitsmitteldruck arbeitende Gangstufe eines Zahnräderwechselgetriebes Die Erfindung bezieht sich auf eine vorzugsweise selbsttätig, z. B. in Abhängigkeit von der Abtriebsdrehzahl wirkende Schaltvorrichtung für eine mit Arbeitsmitteldruck arbeitende Gangstufe eines Zahnräderwechselgetriebes, in, dem die vorhergehende Gangstufe ohne Arbeitsmitteldruck, z. B. durch Federkraft oder mittels einer Freilaufkupplung, geschaltet wird.Switching device for a gear that works with working medium pressure a gear change transmission The invention relates to a preferably automatically, e.g. B. acting as a function of the output speed switching device for a gear stage of a gear change transmission that works with working medium pressure, in which the previous gear step without working medium pressure, z. B. by spring force or by means of an overrunning clutch.
Zahnräderwechselgetriebe, bei denen in den langsamen Gangstufen durch Federkraft schaltbare Kupplungen oder Freilaufkupplungen vorhanden sind und die Kupplungen der höheren Gangstufen durch ein Arbeitsmittel, z. B. Drucköl, geschaltet werden, sind beispielsweise bei dieselhydraulischen Antrieben von Schienenfahrzeugen bekannt. Beim Übergang auf die genannten höheren Gangstufen entstehen Schwierigkeiten, wenn der Arbeitsmitteldruck aus irgendwelchen Gründen (z. B. verstopftes Filter, verschlissene Ölpumpe oder Leckverluste) nicht mehr ausreicht, daß die in der betreffenden Gangstufe des Getriebes von dem Arbeitsmittel eingeschaltete, reibschlüssig kraftübertragende Kupplung das erforderliche Drehmoment überträgt. Bei zu geringem Arbeitsmitteldruck kommt die Kupplung zum Rutschen, was schnellen Verschleiß der Kupplung zur Folge hat. Eine Anzeige des Arbeitsmitteldruckes genügt nicht zur Abhilfe, da Anzeigegeräte oft übersehen werden. Das ebenfalls bekannte vollständige Abschalten des Antriebs in der Weise, daß bei nicht ausreichendem Arbeitsmitteldruck die Antriebsmaschine durch Sperren oder Drosseln der Brennstoffzufuhr stillgesetzt oder auf Leerlauf beschränkt wird, macht ein Abschleppen des Fahrzeuges notwendig, was häufig ebenfalls unerwünscht ist. Eine sich weiter anbietende Möglichkeit zur Abhilfe besteht darin, daß die eingangs erwähnte Schaltvorrichtung eine Sperre aufweist, die bei nicht ausreichendem Arbeitsmitteldruck nicht die Brennstoffzufuhr zur Antriebsmaschine beeinflußt, sondern lediglich diese Schaltvorrichtung selbst unwirksam macht. In diesem Fall bleibt die vorhergehende, ohne Arbeitsmitteldruck arbeitende Gangstufe eingeschaltet, so daß eine beschränkte Fahrmöglichkeit vorhanden und nur der Übergang auf die betrieblich gefährdete, mit Arbeitsmitteldruck arbeitende Gangstufe ausgeschlossen ist. , Der Erfindung liegt die Aufgabe zugrunde, eine derartige Sperre in möglichst einfacher und wenig aufwendiger Art zu schaffen. Gemäß der Erfindung wird diese Aufgabe dadurch gelöst, daß die Schaltvorrichtung als Zylinder mit hydraulisch steuerbarem ; Kolbenschieber ausgebildet ist, wobei der Steuerdruck zum Einschalten der mit Arbeitsmitteldruck arbeitenden Gangstufe anfangs. auf kleiner und erst nach geringer Verschiebung des Kolbenschiebers gegen Federkraft auf größerer Stirnfläche desselben wirksam ist.Gear change transmission, where in the slow gears through Spring force switchable clutches or overrunning clutches are available and the Clutches of the higher gears by a work equipment, z. B. pressure oil switched are, for example, in diesel-hydraulic drives for rail vehicles known. When transitioning to the higher gear steps mentioned, difficulties arise if the working medium pressure for any reason (e.g. clogged filter, worn oil pump or leakage losses) is no longer sufficient that the in the relevant Gear stage of the transmission engaged by the work equipment, frictionally transmitting force Coupling transmits the required torque. If the working medium pressure is too low If the clutch slips, the clutch quickly wears out Has. A display of the working medium pressure is not sufficient as a remedy, as display devices often overlooked. The well-known complete shutdown of the drive in such a way that if the working medium pressure is insufficient, the prime mover shut down or idle by blocking or throttling the fuel supply is limited, makes it necessary to tow the vehicle, which is often also is undesirable. Another possibility to remedy this is to that the aforementioned switching device has a lock that does not apply to sufficient working medium pressure does not prevent the fuel supply to the prime mover affects, but only makes this switching device itself ineffective. In In this case, the previous gear, which works without working medium pressure, remains switched on, so that there is a limited possibility of driving and only the transition excluded to the operationally endangered gear that works with working medium pressure is. , The invention is based on the object of such a lock in as possible easier and less expensive to create. According to the invention, this The object is achieved in that the switching device as a cylinder with hydraulically controllable ; Piston valve is formed, the control pressure for switching on the with Medium pressure working gear initially. on smaller and only after lower Displacement of the piston slide against spring force on the same larger face is effective.
Schaltvorrichtungen mit Kolbenschiebern, bei deren Verschiebung aus der Endlage heraus sich sprunghafte Änderungen des wirksamen Querschnitts und damit der durch Öldruck erzeugten Axialverschiebekraft ergeben, sind in hydraulisch geschalteten Zahnräderwechselgetrieben an sich bekannt, dienen dort jedoch anderen Aufgaben.Switching devices with piston valves, when they are moved off the end position results in sudden changes in the effective cross-section and thus the axial displacement force generated by the oil pressure are hydraulically switched Gear change transmissions are known per se, but serve other purposes there.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt.An exemplary embodiment of the invention is shown schematically in the drawing shown.
Die Schaltvorrichtung besteht aus einem Steuerzylinder 1, in dem ein Kolbenschieber 2 sich gegen die Kraft der Feder 3 nach rechts bewegt und dabei über die Zylinderräume 4 und S das in der Leitung 6 zugeführte Arbeitsmittel von der Leitung 7 auf die Leitung 8 der höheren Gangstufe umsteuert, wenn am Anschluß 9 der Druck des steuernden Arbeitsmittels wirkt. Dieser Druck wirkt zunächst nur auf die die Vorkammer 10 begrenzende Teilfläche des Schaltkolbens 11 und erst nach einer geringen Verschiebung des Kolbenschiebers 2 nach rechts auf die ganze Stirnfläche des Schaltkolbens. Der Durchmesser der Vorkammer 10 und die Vorspannung der Feder 3 sind so bemessen, daß die Verschiebung des Kolbenschiebers 2 nach rechts erst eingeleitet und dann auch sofort bis zur rechten Endlage fortgesetzt wird, wenn der am Anschluß 9 wirkende Arbeitsmitteldruck so groß ist, daß die von ihm geschalteten Kupplungen der höheren Gangstufe das dort auftretende größte Drehmoment sicher zu übertragen vermögen.The switching device consists of a control cylinder 1 in which a piston slide 2 moves to the right against the force of the spring 3 and thereby reverses the working fluid supplied in the line 6 from the line 7 to the line 8 of the higher gear via the cylinder chambers 4 and S when the pressure of the controlling working medium acts at connection 9. This pressure initially only acts on the partial surface of the switching piston 11 delimiting the prechamber 10 and only after a slight displacement of the piston slide 2 to the right on the entire face of the switching piston. The diameter of the prechamber 10 and the bias of the spring 3 are dimensioned so that the displacement of the piston valve 2 to the right is first initiated and then immediately continued to the right end position when the working medium pressure acting on the connection 9 is so great that the of He engaged clutches of the higher gear are able to safely transmit the greatest torque occurring there.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA27436A DE1127679B (en) | 1957-06-29 | 1957-06-29 | Switching device for a gear stage of a gear change transmission that works with working medium pressure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA27436A DE1127679B (en) | 1957-06-29 | 1957-06-29 | Switching device for a gear stage of a gear change transmission that works with working medium pressure |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1127679B true DE1127679B (en) | 1962-04-12 |
Family
ID=6926390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA27436A Pending DE1127679B (en) | 1957-06-29 | 1957-06-29 | Switching device for a gear stage of a gear change transmission that works with working medium pressure |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1127679B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3012409A1 (en) * | 1979-04-04 | 1980-10-09 | Deere & Co | CONTROL DEVICE FOR MANUAL GEARBOX, ESPECIALLY FOR ARM TRACTORS |
DE3835295A1 (en) * | 1988-10-17 | 1990-04-19 | Rexroth Mannesmann Gmbh | Valve arrangement for the control system of a gearbox |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE678711C (en) * | 1936-08-29 | 1939-07-21 | Maybach Motorenbau G M B H | Control device for the pressure medium of a switching device of gear change transmissions, especially in motor vehicles |
DE678712C (en) * | 1936-11-01 | 1939-07-22 | Maybach Motorenbau G M B H | Control device for the pressure medium of a switching device for change gears, especially in motor vehicles |
-
1957
- 1957-06-29 DE DEA27436A patent/DE1127679B/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE678711C (en) * | 1936-08-29 | 1939-07-21 | Maybach Motorenbau G M B H | Control device for the pressure medium of a switching device of gear change transmissions, especially in motor vehicles |
DE678712C (en) * | 1936-11-01 | 1939-07-22 | Maybach Motorenbau G M B H | Control device for the pressure medium of a switching device for change gears, especially in motor vehicles |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3012409A1 (en) * | 1979-04-04 | 1980-10-09 | Deere & Co | CONTROL DEVICE FOR MANUAL GEARBOX, ESPECIALLY FOR ARM TRACTORS |
DE3835295A1 (en) * | 1988-10-17 | 1990-04-19 | Rexroth Mannesmann Gmbh | Valve arrangement for the control system of a gearbox |
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