EP2019938A1 - Chain tensioner having a two-part screw-in housing - Google Patents
Chain tensioner having a two-part screw-in housingInfo
- Publication number
- EP2019938A1 EP2019938A1 EP07711444A EP07711444A EP2019938A1 EP 2019938 A1 EP2019938 A1 EP 2019938A1 EP 07711444 A EP07711444 A EP 07711444A EP 07711444 A EP07711444 A EP 07711444A EP 2019938 A1 EP2019938 A1 EP 2019938A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw
- flange head
- sleeve
- housing
- flange
- 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- Withdrawn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
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
-
- 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
Definitions
- Chain tensioner with a two-piece screw-in housing
- the present invention relates to a chain tensioner with a screw-in housing and a clamping piston displaceably arranged in the screw-in housing, wherein the screw-in housing comprises a flange head and a screw-in sleeve arranged thereon.
- the present invention is therefore an object of the invention to provide a chain tensioner of the type mentioned, which allows a more flexible and cost-effective production.
- the flange body and the screw-in sleeve have at least different surface material properties.
- the flange head and the screw-in sleeves (completely) have different material properties.
- the flange head serves mainly as a base, whereas the screw-in sleeve is exposed to the constant relative movements of the tensioning piston.
- the flange head is more resistant to corrosion than the screw-in sleeve, in particular the flange head is provided with a Ko ⁇ rosionstikbe harshung is favorable. Namely, the flange head is subjected to increased corrosion due to its position out of the lubricating area.
- a further embodiment provides that the flange head is a flow press.
- extruded parts can be produced faster and in larger quantities with very high accuracy.
- the flange head is to use as a common part for a whole product series, this offers itself in a favorable manner. Other inexpensive manufacturing methods can be used.
- the invention relates to a product series consisting of at least two chain tensioners according to one of claims 1 to 5.
- the product series is characterized in that in all chain tensioners of the product series the flange head of the housing is a common part and at least two chain tensioners the screw is designed differently. The flange head is therefore produced in large quantities, while the screw-in sleeve is adapted to the specific engine conditions.
- the differently configured screw-in sleeves may vary in the length and / or the position of the thread and / or the tolerance for a between the thread dehülse and the clamping piston trainees to distinguish leakage gap.
- the flange head is always the same design. The costs for a product series can be reduced thereby.
- the invention relates to a method for producing a plurality of chain tensioners each having a screw-in housing and a clamping piston displaceable in the screw-in housing, wherein the screw-in housing comprises a flange head and a screw-in sleeve arranged thereon and the method comprises the following steps:
- the method has the additional step:
- the corrosion protection coating is tailored to the location of the flange head and now takes better account of the installation conditions when screwed chain tensioner.
- the screw-in sleeve is protected in a screw-in opening. In most cases, the flange head rests on a seal, since the oil supply takes place over this. The entire screw-in sleeve is therefore located in a much more corrosion-protected area than the flange head.
- the application of the anticorrosive coating preferably takes place simultaneously with a plurality of flange heads in a drum.
- the previously produced by turning one screw housings could only be coated as rack goods, which means a more complex production.
- the individual Einschraubgephinus ⁇ must be positioned on the frame, which is mostly manual work.
- Drumware can be very easily processed as bulk material and requires no such pre-positioning for the coating.
- the method may include the additional steps of:
- the joining of the flange head and the screw-in sleeve can take place by means of compression and / or friction welding and / or laser welding and / or resistance welding and / or gluing and / or threading.
- the attachment must be such that it takes into account the prevailing pressures and tensile stresses in the field. All listed procedures can also be automated.
- FIG. 1 shows a full section through a first embodiment of a Einschraubkettenspanner invention
- FIG. 2 shows a full section through a second embodiment of a Einschraubkettenspanners invention.
- the Einschraubkettenspanner 1 shown in Fig. 1 comprises a Einschraubgephaseuse 2, a hollow cylindrical clamping piston 3 and a check valve 4.
- additional components such as a compression spring and a plastic packing to reduce the liquid volume are arranged in the Einschraubgepatuse 2, but omitted for reasons of simplification have been.
- Such elements are well known in the art.
- the screw-in housing 2 consists of two components. These two components are on the one hand the flange head 10 and on the other hand arranged screw-11.
- the flange head 10 has an enlarged head portion 12 with arranged on the bottom stop surface 13.
- radially extending feed holes 14 are provided, which open into an axially arranged feed bore 15.
- the supply bore 15 has an enlarged seat 16 at the front end of the connecting part 13, in which the check valve 4 is arranged.
- the connecting part 13 is provided at its end with a reduced in diameter plug-in portion 17 which is inserted into the bore 5 of the screw 11, so that the associated end face of the screw-in with the connecting part 13 comes to rest.
- the connecting part 13 has essentially the same diameter as the diameter of the adjoining section of the screw-in sleeve 11.
- the bore 5 of the screw-in sleeve 11 has a continuously uniform inner diameter. Also, the outer diameter of the screw 11 has the same diameter except for the threaded portion 18.
- the threaded portion 18 extends approximately over one third of the length of the screw 11, wherein the distance of the threaded portion 13 from the front free end of the screw 11 is only half as large as the distance to the other, the flange head 10 facing the end.
- the front portion of the clamping piston 3 is reduced in diameter, so that a stop shoulder 19 is formed.
- the front free end of the screw 11 is caulked, so that the caulking in combination with the stop shoulder 19 ensures that the clamping piston 3 is secured in the screw-2.
- the flange head 10 and the screw 11 can consist of different materials. These can also consist of the same materials; However, be provided with different coatings. Also, only one of the two parts (preferably the flange head 10) can be provided with anticorrosive coating for corrosion protection reasons.
- the flange head 10 is designed in the present case as a flow press.
- the pressure chamber 6 After screwing the Einschraubkettenspanners 1 in the space provided for the screw-in motor vehicle engine, the pressure chamber 6 is on the supply bore 14, the supply bore 15 and the check valve 4 with the engine oil in combination. As soon as a corresponding oil pressure has been set by starting the engine, the hydraulic pressure prevailing in the pressure chamber 6 presses the tensioning piston 3 to the right, until a tensioning rail is desirably pressed against a chain, in particular a timing chain on an internal combustion engine. After the check valve 4 prevents a backflow of hydraulic fluid through the bores 15 and 14, hydraulic fluid can escape through the leakage gap 9 and / or the vent hole 8. About the leakage gap 9 can also be the damping property of Einschraubkettenspanners 1 set.
- the Aufdrückkopf 7 smoothly merges into the associated end portion of the clamping piston 3 and does not project radially outward.
- an inwardly projecting, circumferential projection 20 is provided at the end of the screw 11, which ensures together with the stop shoulder 19 for securing the clamping piston 3 in the screw-2.
- the clamping piston 3 must be placed in the screw 11, before it is joined to the flange head 10. A caulking of the free end portion of the screw 11 is no longer required.
- the Einschraubkettenspanner 1 of FIG. 2 is identical to the previous embodiment constructed.
- the joining of the screw-in sleeve 11 with the flange head 10 can take place in different ways by pressing and / or friction welding and / or laser welding and / or resistance welding and / or gluing.
- FIGS. 1 and 2 can also be part of a product series, in which the flange head 10 is designed as a common part and the screw-in 11 is formed differently.
- the flange head 10 is designed as a common part and the screw-in 11 is formed differently.
- Einschraubhülsen be used, which differ in their length and / or in the position of their threaded portion and / or in the tolerance for the leakage gap 9.
- the type of thread could be different.
- a product series with different Einschraubkettenspannem generated, with the flange head 10 can be used as a common part.
- the flange head 10 is provided with a corrosion coating, this coating can be carried out in a drum process. Subsequently, such a coated flange head 10 is joined with an uncoated screw 11. Accordingly, a partial standardization of the screw-in housing 2 takes place.
- the flange head 10 can be produced as a common part in higher numbers (for example as extruded part).
- the screw 11 can be adapted to the engine-specific conditions. Although an additional manufacturing step is required by the separate production (the joining of flange head and screw-in sleeve). Overall, however, there is a cost advantage for the thus constructed Einschraubgepatuse 2, in particular, if this type is used in the context of a product series.
- the method according to the invention produces a two-part screw-in housing 2.
- the separate production of the flange head 10 and the screw 11 has some advantages for mass production.
- the flange head 10 can be inexpensively produced and coated as a common part, whereas a coating of the Screw-in 11 can be dispensed with.
- the coating can also be carried out in a less expensive process (eg drum process).
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
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610024426 DE102006024426A1 (en) | 2006-05-24 | 2006-05-24 | Chain tensioner with a two-piece screw-in housing |
PCT/EP2007/001001 WO2007134652A1 (en) | 2006-05-24 | 2007-02-06 | Chain tensioner having a two-part screw-in housing |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2019938A1 true EP2019938A1 (en) | 2009-02-04 |
Family
ID=37969710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07711444A Withdrawn EP2019938A1 (en) | 2006-05-24 | 2007-02-06 | Chain tensioner having a two-part screw-in housing |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2019938A1 (en) |
DE (1) | DE102006024426A1 (en) |
WO (1) | WO2007134652A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE102016116477A1 (en) | 2016-09-02 | 2018-03-08 | Iwis Motorsysteme Gmbh & Co. Kg | Hydraulic clamping device with precision drainage bore and optimized internal geometry |
DE102016116475A1 (en) | 2016-09-02 | 2018-03-08 | Iwis Motorsysteme Gmbh & Co. Kg | Hydraulic tensioner with conical precision drain hole |
DE102017104533B4 (en) | 2017-03-03 | 2021-11-04 | Volkswagen Aktiengesellschaft | Chain tensioner for a chain of a timing drive of an internal combustion engine |
DE102017109402A1 (en) * | 2017-05-03 | 2018-11-08 | Schaeffler Technologies AG & Co. KG | Clamping device with housing produced by deformation, traction drive with clamping device and manufacturing method |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4015708C1 (en) * | 1990-05-16 | 1991-07-25 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Hydraulic IC engine chain tensioner - has liq. outlet limiting closure of sintered metal with incorporated throttling passages |
DE4035823C1 (en) * | 1990-11-10 | 1991-12-19 | Bayerische Motoren Werke Ag, 8000 Muenchen, De | Hydraulic tensioner for chain drives - has pressure restrictor valve in bottom of tension piston guide |
US7070528B2 (en) * | 2002-03-28 | 2006-07-04 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulic tensioner lifter |
DE202004002705U1 (en) * | 2004-02-20 | 2005-06-30 | Joh. Winklhofer & Söhne GmbH und Co KG | Tightening device for a flexible drive element, in particular, a timing belt of an internal combustion engine comprises an additional, pressure-controllable damping element |
-
2006
- 2006-05-24 DE DE200610024426 patent/DE102006024426A1/en not_active Withdrawn
-
2007
- 2007-02-06 WO PCT/EP2007/001001 patent/WO2007134652A1/en active Application Filing
- 2007-02-06 EP EP07711444A patent/EP2019938A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2007134652A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102006024426A1 (en) | 2007-11-29 |
WO2007134652A1 (en) | 2007-11-29 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20081028 |
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AK | Designated contracting states |
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AX | Request for extension of the european patent |
Extension state: AL BA HR MK RS |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KETTERL, SANDRA Inventor name: PREIS, ARTUR Inventor name: BODENSTEINER, MARTIN |
|
DAX | Request for extension of the european patent (deleted) | ||
RBV | Designated contracting states (corrected) |
Designated state(s): DE FR IT |
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GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20100428 |