DE102004012394A1 - Hydraulic clamp e.g. for chain or belts, changes absorption with increasing stroke and cylinder and piston of tension adjuster has increasing stroke such that leakage length of gap rises - Google Patents
Hydraulic clamp e.g. for chain or belts, changes absorption with increasing stroke and cylinder and piston of tension adjuster has increasing stroke such that leakage length of gap rises Download PDFInfo
- Publication number
- DE102004012394A1 DE102004012394A1 DE200410012394 DE102004012394A DE102004012394A1 DE 102004012394 A1 DE102004012394 A1 DE 102004012394A1 DE 200410012394 DE200410012394 DE 200410012394 DE 102004012394 A DE102004012394 A DE 102004012394A DE 102004012394 A1 DE102004012394 A1 DE 102004012394A1
- Authority
- DE
- Germany
- Prior art keywords
- piston
- cylinder
- increasing stroke
- stroke
- increasing
- 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- Withdrawn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
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0829—Means for varying tension of belts, ropes, or chains with vibration damping means
- F16H7/0836—Means for varying tension of belts, ropes, or chains with vibration damping means of the fluid and restriction type, e.g. dashpot
-
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0806—Compression coil springs
-
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
-
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
- F16H2007/0859—Check valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
Gebiet der ErfindungTerritory of invention
Die Erfindung bezieht sich auf einen hydraulischen Spanner für Zugmittel, insbesondere Ketten oder Riemen, mit sich über den Hub verändernder Dämpfung.The The invention relates to a hydraulic tensioner for traction means, especially chains or belts, with over the stroke changing damping.
Da sich beim Ausfahren des Spanners – bedingt durch Temperatur, Verschleiß und elastische Dehnung des Zugmittels – die Zugmittelspuren und damit der Umschlingungswinkel um Schiene oder Rolle ändert, ändert sich auch das Übersetzungsverhältnis zwischen der Kraft im Zugmittel und der Kraft im Spanner.There during extension of the tensioner - due to temperature, Wear and tear Elastic stretching of the traction means - the Zugmittelspuren and thus the wrap angle changes around rail or roller, the gear ratio also changes the force in the traction means and the force in the tensioner.
Zusammenfassung der ErfindungSummary the invention
Der Erfindung liegt daher die Aufgabe zugrunde, einen hydraulischen Spanner der eingangs genannten Art so auszugestalten, dass in jeder Spannerstellung dem Zugmittel die gleiche Kraft entgegengebracht werden kann.Of the Invention is therefore based on the object, a hydraulic Spanner of the type mentioned in such a way that in each tensioner position the traction means the same force can be given.
Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, dass die Dämpfung des Spanners mit zunehmendem Hub ansteigt.to solution this object is inventively provided that damping of the tensioner increases with increasing stroke.
Dieses Ansteigen der Dämpfung mit zunehmendem Hub steht im Gegensatz zu den bislang bekannten Konstruktionen solcher hydraulischer Spanner, bei denen die Dämpfung allenfalls über den Spannerhub konstant bleibt, im Allgemeinen aber sogar über den Spannerhub abnimmt.This Increase in damping with increasing stroke is in contrast to the previously known Constructions of such hydraulic tensioners, where the damping at best over the tensioner stroke remains constant, but generally decreases even over the tensioner stroke.
Gemäß einem ersten Ausführungsbeispiel der Erfindung ist dabei vorgesehen, dass die Ausbildung des Zylinders und des Kolbens des Spanners so getroffen ist, dass bei zunehmendem Hub die Leckspaltlänge ansteigt, was in Ausgestaltung der Erfindung besonders einfach in der Weise realisierbar ist, dass sowohl der Zylinder als auch der Kolben mit in Axialrichtung begrenzte Dichtflächenbereichen versehen sind, die zwischen sich den Dichtspalt bildend sich mit zunehmendem Hub stärker überlappen.According to one first embodiment of the Invention is provided that the formation of the cylinder and the piston of the tensioner is such that when increasing Hub the leakage gap length increases, which in the embodiment of the invention particularly simple in the manner is feasible that both the cylinder and the Pistons are provided with axially limited sealing surface areas, which forms the sealing gap between them with increasing stroke overlap more strongly.
Anstelle der mit zunehmendem Hub ansteigenden Leckspaltlänge könnte gemäß einem weiteren Ausbildungsbeispiel der Erfindung auch vorgesehen sein, dass die Ausbildung des Zylinders und des Kolbens des Spanners so getroffen ist, dass bei zunehmendem Hub die Leckspalthöhe abnimmt.Instead of The increasing with increasing stroke leakage gap length could according to another exemplary embodiment The invention also be provided that the formation of the cylinder and the piston of the tensioner is such that when increasing Hub the leak gap height decreases.
Diese Abnahme der Leckspalthöhe kann entweder dadurch erzielt werden, dass der Kobenaußendurchmesser bei vorzugsweise zylindrischem Zylinderinnendurchmesser nach außen konisch abnimmt, oder aber dass der Zylinderinnendurchmesser bei vorzugsweise gleichbleibend zylindrischem Außendurchmesser des Zylinders nach außen konisch zunimmt.These Decrease in leakage gap height can be achieved either by the Kobenaußendurchmesser at preferably cylindrical cylindrical inner diameter conical outward decreases, or that the cylinder inner diameter at preferably Consistently cylindrical outer diameter of the cylinder to the outside increases conically.
Kurze Beschreibung der ZeichnungenShort description the drawings
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels sowie anhand der Zeichnung. Dabei zeigen:Further Advantages, features and details of the invention will become apparent the following description of an embodiment and with reference the drawing. Showing:
Detaillierte Beschreibung der Zeichnungendetailed Description of the drawings
Die
Bei
herkömmlichen
hydraulischen Spannern nimmt bei zunehmender Spannerauslenkung,
also zunehmendem Spannerhub, das Kraftverhältnis Kette/Spanner progressiv
ab, was in seiner Entstehung durch die
Bei
der Anordnung nach den
Bei
einer weiteren bekannten Ausführungsform
nach
Die
Die
Die
Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt. So
wäre es
insbesondere anstelle der Ausbildung nach den
- 11
- Zugmitteltraction means
- 2a2a
- Zahnradgear
- 2b2 B
- Zahnradgear
- 33
- hydraulischer Spannerhydraulic Stretcher
- 44
- Außenfläche des KolbensOutside surface of the piston
- 4'4 '
- Außenfläche des KolbensOutside surface of the piston
- 4''4 ''
- DichtflächenbereichSealing surface area
- 55
- Kolbenpiston
- 66
- Innenfläche des ZylindersInner surface of the cylinder
- 6'6 '
- Innenfläche des ZylindersInner surface of the cylinder
- 6''6 ''
- DichtflächenbereichSealing surface area
- 77
- Zylindercylinder
- 8a8a
- LeckspaltlängeLeakage gap length
- 8a'8a '
- LeckspaltlängeLeakage gap length
- 8a''8a ''
- LeckspaltlängeLeakage gap length
- 8a'''8a '' '
- LeckspalthöheLeakage gap height
- 8b8b
- LeckspaltlängeLeakage gap length
- 8b'8b '
- LeckspaltlängeLeakage gap length
- 8b''8b ''
- LeckspaltlängeLeakage gap length
- 8b'''8b '' '
- LeckspalthöheLeakage gap height
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410012394 DE102004012394A1 (en) | 2004-03-13 | 2004-03-13 | Hydraulic clamp e.g. for chain or belts, changes absorption with increasing stroke and cylinder and piston of tension adjuster has increasing stroke such that leakage length of gap rises |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410012394 DE102004012394A1 (en) | 2004-03-13 | 2004-03-13 | Hydraulic clamp e.g. for chain or belts, changes absorption with increasing stroke and cylinder and piston of tension adjuster has increasing stroke such that leakage length of gap rises |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004012394A1 true DE102004012394A1 (en) | 2005-09-29 |
Family
ID=34895356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200410012394 Withdrawn DE102004012394A1 (en) | 2004-03-13 | 2004-03-13 | Hydraulic clamp e.g. for chain or belts, changes absorption with increasing stroke and cylinder and piston of tension adjuster has increasing stroke such that leakage length of gap rises |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102004012394A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008155202A1 (en) * | 2007-06-20 | 2008-12-24 | Schaeffler Kg | Hydraulic tensioning element for a traction mechanism drive |
DE102008005763A1 (en) | 2008-01-24 | 2009-07-30 | Schaeffler Kg | Hydraulic tensioner for e.g. belt, has pressure chamber for admitting hydraulic fluid, and circular element and actuator controllable for changing damping characteristic of tensioner, where controllability of element is realized by actuator |
DE102008052308A1 (en) * | 2008-10-18 | 2010-04-22 | Schaeffler Kg | Traction unit tensioning device for traction drive of internal combustion engine of motor vehicle, has damping device designed such that damping effect on piston is based on deflecting length of piston relative to housing |
WO2014154210A1 (en) * | 2013-03-28 | 2014-10-02 | Schaeffler Technologies Gmbh & Co. Kg | Hydraulic traction means tensioner having constant dynamic damping behaviour |
DE102015209558A1 (en) | 2015-05-26 | 2016-01-28 | Schaeffler Technologies AG & Co. KG | Zugmittelspanner with an adjustable by changing the leakage damping |
DE102015205777B3 (en) * | 2015-03-31 | 2016-05-25 | Schaeffler Technologies AG & Co. KG | Hydraulic traction mechanism with a pressure regulator |
DE102015208536A1 (en) | 2015-05-07 | 2016-07-21 | Schaeffler Technologies AG & Co. KG | Hydraulic clamping unit for generating different damping force levels |
DE102015208539A1 (en) | 2015-05-07 | 2016-11-10 | Schaeffler Technologies AG & Co. KG | Parallel chain tensioner for generating different damping properties |
DE102016124741A1 (en) | 2016-12-19 | 2018-06-21 | Schaeffler Technologies AG & Co. KG | Hydraulic tensioner for traction means with variable damping |
DE102009034047B4 (en) * | 2008-07-24 | 2019-08-29 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Chain drive tensioner system with variable passage |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6053831A (en) * | 1998-12-08 | 2000-04-25 | Borg-Warner Automotive, Inc. | Hydraulic tensioner with passage of variable cross-section between the piston and bore |
DE10038606A1 (en) * | 2000-08-08 | 2002-03-28 | Schaeffler Waelzlager Ohg | chain tensioner |
JP2003166607A (en) * | 2001-11-28 | 2003-06-13 | Otics Corp | Hydraulic automatic tensioner |
-
2004
- 2004-03-13 DE DE200410012394 patent/DE102004012394A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6053831A (en) * | 1998-12-08 | 2000-04-25 | Borg-Warner Automotive, Inc. | Hydraulic tensioner with passage of variable cross-section between the piston and bore |
DE10038606A1 (en) * | 2000-08-08 | 2002-03-28 | Schaeffler Waelzlager Ohg | chain tensioner |
JP2003166607A (en) * | 2001-11-28 | 2003-06-13 | Otics Corp | Hydraulic automatic tensioner |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008155202A1 (en) * | 2007-06-20 | 2008-12-24 | Schaeffler Kg | Hydraulic tensioning element for a traction mechanism drive |
DE102008005763A1 (en) | 2008-01-24 | 2009-07-30 | Schaeffler Kg | Hydraulic tensioner for e.g. belt, has pressure chamber for admitting hydraulic fluid, and circular element and actuator controllable for changing damping characteristic of tensioner, where controllability of element is realized by actuator |
DE102009034047B4 (en) * | 2008-07-24 | 2019-08-29 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Chain drive tensioner system with variable passage |
DE102008052308A1 (en) * | 2008-10-18 | 2010-04-22 | Schaeffler Kg | Traction unit tensioning device for traction drive of internal combustion engine of motor vehicle, has damping device designed such that damping effect on piston is based on deflecting length of piston relative to housing |
WO2014154210A1 (en) * | 2013-03-28 | 2014-10-02 | Schaeffler Technologies Gmbh & Co. Kg | Hydraulic traction means tensioner having constant dynamic damping behaviour |
DE102013205535A1 (en) * | 2013-03-28 | 2014-10-02 | Schaeffler Technologies Gmbh & Co. Kg | Hydraulic traction mechanism with constant dynamic damping behavior |
DE102015205777B3 (en) * | 2015-03-31 | 2016-05-25 | Schaeffler Technologies AG & Co. KG | Hydraulic traction mechanism with a pressure regulator |
WO2016155712A1 (en) | 2015-03-31 | 2016-10-06 | Schaeffler Technologies AG & Co. KG | Hydraulic traction mechanism tensioner having a pressure regulator |
US10591027B2 (en) | 2015-03-31 | 2020-03-17 | Schaeffler Technologies AG & Co. KG | Hydraulic traction mechanism tensioner including a pressure regulator |
DE102015208536A1 (en) | 2015-05-07 | 2016-07-21 | Schaeffler Technologies AG & Co. KG | Hydraulic clamping unit for generating different damping force levels |
DE102015208539A1 (en) | 2015-05-07 | 2016-11-10 | Schaeffler Technologies AG & Co. KG | Parallel chain tensioner for generating different damping properties |
DE102015209558A1 (en) | 2015-05-26 | 2016-01-28 | Schaeffler Technologies AG & Co. KG | Zugmittelspanner with an adjustable by changing the leakage damping |
DE102016124741A1 (en) | 2016-12-19 | 2018-06-21 | Schaeffler Technologies AG & Co. KG | Hydraulic tensioner for traction means with variable damping |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: SCHAEFFLER KG, 91074 HERZOGENAURACH, DE |
|
8127 | New person/name/address of the applicant |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 H, DE |
|
8110 | Request for examination paragraph 44 | ||
R012 | Request for examination validly filed |
Effective date: 20110202 |
|
R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20120822 Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20120822 |
|
R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES AG & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20140214 Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES AG & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20140214 |
|
R016 | Response to examination communication | ||
R016 | Response to examination communication | ||
R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20150211 |
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R016 | Response to examination communication | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |