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WO2016012019A1 - Unité hydraulique de tension de chaînes composée d'éléments déformables - Google Patents

Unité hydraulique de tension de chaînes composée d'éléments déformables Download PDF

Info

Publication number
WO2016012019A1
WO2016012019A1 PCT/DE2015/200407 DE2015200407W WO2016012019A1 WO 2016012019 A1 WO2016012019 A1 WO 2016012019A1 DE 2015200407 W DE2015200407 W DE 2015200407W WO 2016012019 A1 WO2016012019 A1 WO 2016012019A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
piston
zugmittelspanner
ring
hydraulic
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.)
Ceased
Application number
PCT/DE2015/200407
Other languages
German (de)
English (en)
Inventor
Christopher Krawietz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of WO2016012019A1 publication Critical patent/WO2016012019A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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 
    • F16H7/0848—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 
    • F16H7/0829—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 
    • F16H2007/0846—Means for varying tension of belts, ropes or chains  comprising a mechanical stopper
    • 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
    • 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 
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0891—Linear path

Definitions

  • Hydraulic chain tensioning unit made of formed parts
  • the invention relates to a hydraulic Buchstoffspanner for infinloszugstoffaus- deflecting moving a tensioning rail, for a camshaft or secondary drive, eg.
  • An internal combustion engine-powered vehicle such as a car, a motorcycle, a truck or other commercial vehicle, with a piston, the hydraulic medium pressure due to a first End of a housing from this is mounted extendable and interrupting a hydraulic fluid return switchable check valve unit which is held stationary relative to the housing.
  • Hydraulic tensioning devices in traction mechanism drives which serve to drive one or more camshafts or balancing shafts and / or ancillary units are already known from the prior art.
  • the hydraulic principle using Buchstoffspanner is, for example, from DE 10 2010 032 630 A1 known.
  • a traction mechanism drive with a clamping device which has a housing in which a tensioning piston is mounted so extendable by means of a first compression spring that it deflects a system guided by a tensioning rail on the tensioning rail traction means, wherein between the housing and the surface of the Tensioning piston a locking device is formed, which prevents re-insertion of the clamping piston in the housing, wherein at that the clamping rail facing the end of the clamping piston a fluid-containing buffer capsule is arranged, which is at least indirectly brought into contact with the clamping rail.
  • Hydraulic chain tensioners are also known from DE 10 2007 037 720 A1. There, a control drive of an internal combustion engine is presented, which also uses a hydraulic Buchstoffspanner.
  • Conventional hydraulic chain tensioners are usually composed of machined individual parts. This entails numerous processing steps in the production, which is expensive such a tensioning means tensioner leaves. Also due to the variety of components, possibly to be used variants, the costs are driven upwards.
  • DE 10 2006 055 467 A1 shows a hydraulic tensioning device and the like. with a piston and a housing, which are the result of a thermoforming process - and thus forming technology - produced.
  • a one-way valve unit which consists of a holding element in which a valve body designed as a disk is guided secured against loss.
  • the holding element is designed as a housing and also serves as a valve seat.
  • clamping element and its subassemblies and items can be achieved, for example, by using a cold forming. This can significantly reduce costs. On turning, milling, grinding or drilling operations can be dispensed with. As a whole, machining steps can be dispensed with.
  • the cost-minimizing potential can be exploited if (also) the sleeve is made of forming sheet without cutting, for example, from the same material, such as the piston and / or the housing.
  • the securing ring is arranged in a first or second ring pocket formed completely circumferentially between the inner circumferential surface of the housing and the outer peripheral surface of the piston.
  • the retaining ring can then have a radially outwardly acting bias, which causes a positive connection from a certain operating position of the piston in the housing between the three components, whereby a captive is ensured.
  • the first ring pocket axially and / or radially further inside than the second ring pocket is arranged in the retracted into the housing state of the piston. An intrusion or immersion of the retaining ring from the first ring pocket in the second ring pocket, with a corresponding operating position of the housing relative to the piston and vice versa, is then skilfully accessible.
  • An advantageous embodiment is also characterized in that the two ring pockets and the locking ring are coordinated so that when the piston is extended out of the housing in a maximum position of the piston, the Circlip in the second ring pocket engages that further extension of the piston is prevented, in particular by using a bias of the locking ring and a positive connection of the locking ring with the housing and / or the piston.
  • a thread such as an external thread can be applied to the housing at a small predefined location to a Einschraubhus of the housing in a Engine block or a traction drive housing to ensure / enable.
  • the external thread does not have to run over a great length, but only in the region of an axially relatively short annular section.
  • An advantageous embodiment is also characterized in that a compression spring biasing on the piston and a closure element, such as a ball, the check valve unit is arranged.
  • the invention also relates to a endless traction drive with an endless traction means, such as a chain or a belt, which is deflected with the interposition of a tensioning rail by a hydraulic Buchstoffspanner of the type according to the invention / is prepared for deflecting.
  • an endless traction means such as a chain or a belt
  • a clamping unit which is designed as a screw plug version and comprises the following components: a housing, a piston, a sleeve, a check valve unit, a pressure spring and a retaining ring.
  • the housing is made of sheet metal and is produced without any turning, milling, grinding or drilling operations using a forming technology.
  • the housing has a hexagonal shape at the rear end, wherein this form specifies a wrench size and used for mounting the clamping unit in the engine. With a collar begins, seen in the direction of the piston near end, the rotationally symmetric region of the housing.
  • the collar also serves to seal the clamping unit to the environment and can be designed with or without additional sealing washer or sealing washers.
  • a thread is attached to the circumference of the housing, which serves for fixing in the motor-side tensioner bore.
  • a captive can additionally a screw lock, for example.
  • materials such as those known as "Loctite" are applied to the threads.
  • the wall thickness is reduced / stretched and forms after mounting and flanging a pocket in which the locking ring engages and protects the clamping unit from disintegration.
  • the piston is rotationally symmetric and has a diameter to length ratio of 1: 1 to 1: 4.
  • the front side has a mandrel embossed, which fixes the compression spring in position.
  • Centric, but also eccentric, an oil lubrication opening can be attached, with a diameter of maximum, 2 mm.
  • the width of the groove can be between 1 mm and 10 mm. Values of 2, 3, 4, 5, 6, 7 and 8 mm are particularly advantageous.
  • the sleeve in the interior of the clamping unit serves to fix the check valve unit on which the compression spring is supported. The sleeve separates a supply chamber from a high-pressure chamber of the clamping unit. Through openings, the oil can pass through the opening in the housing to the check valve unit and supply the high-pressure chamber with oil.
  • the check valve unit may be formed as a standard component.
  • FIG. 1 is a partially cutaway perspective view of a hydraulic Werbachspanners invention
  • Fig. 2 is a perspective view of the Buchstoffspanners of FIG. 1,
  • Fig. 3 is a further, rotated to the illustration of Figure 2 perspective view of the hydraulic Werbachspanners of FIGS. 1 and 2
  • Fig. 4 is a side view of the Buchstoffspanners of FIGS. 1 to 3
  • Fig. 5 is a front view of a hexagonal head of the housing of Wegstoffspanners of Fig. 1 to 4.
  • the figures are merely schematic in nature and serve only to understand the invention. The same elements are provided with the same reference numerals.
  • an inventive hydraulic Zaschspanner 1 is shown, which is useful as a chain tensioner. It is used in a traction drive, which serves to drive one or more camshafts or balancing shafts and ancillaries. He has a piston 2, which acts on a tensioning rail, not shown, which in turn acts on a not shown endless traction means, such as a chain.
  • the piston 2 is arranged concentrically in a housing 3.
  • the piston 2 is slidably mounted in the housing 3, wherein, however, the outer circumference of the piston 2 is adapted to the inner circumference of the housing 3, that a good sealing effect between the two components is achieved.
  • a check valve unit 4 is disposed at a piston distal end portion of the housing 3, within the housing 3 and concentrically.
  • the check valve unit 4 is supported on a concentrically arranged in the housing 3 sleeve 5 from.
  • the check valve unit 4 also has a valve 6, which is designed in the manner of a ball 7.
  • a compression spring 8, in the manner of a helical spring 9, is supported on the piston 2 and a contact component 10.
  • the contact member 10 contacts the valve 6 with the interposition of a biasing element 1 1, such as another spring.
  • the piston 2, the housing 3 and the sleeve 5 are made of forming sheet without cutting, such as deep-drawn.
  • the sleeve 5 has an opening 12, can pass through the hydraulic means, such as pressure oil / (engine) oil from a supply chamber 13 in the interior of the sleeve 5, then acting pressure on the valve 6 act.
  • the housing 3 has at its end remote from the piston on a hexagonal shape 14 which is adjacent to a collar 15.
  • the collar 15 is made by a crimping or bending / Umfieung /.
  • an oil supply opening 16 is present on the hexagonal shape side facing away from the collar 15.
  • a thread 17 approximately in the manner of an external thread, applied and ends at a dilution / reduced thickness portion 18 of the housing.
  • the wall thickness of the dilution region 18 is smaller than in the other area of the housing.
  • the piston 2 has an inwardly directed circumferential groove 19.
  • the groove allows the formation of a first ring pocket / pocket 20 between the inner peripheral surface of the housing 3 and the outer peripheral surface of the piston 2.
  • a first ring pocket / pocket 20 between the inner peripheral surface of the housing 3 and the outer peripheral surface of the piston 2.
  • another pocket namely a second ring pocket 22, is formed.
  • a locking ring 23 is present in the first ring pocket 20, a locking ring 23 is present.
  • a dome 24 is provided axially inwardly at the bottom of the piston 2 is present.
  • the clamping rail, not shown, and also the endless traction means can be lubricated targeted.
  • the maximum thickness of the bottom of the piston 2, so the area of the piston 2, which also acts displacing on the clamping rail is between 1, 1 mm and 1, 3 mm, preferably 1, 2 mm dimensioned.
  • a measured in the axial direction width of the first ring pocket 20 and / or the second ring pocket 22 is between 1 and 10 mm. 2, a rotationally symmetrical region 26 of the housing 3 is referenced.

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

L'invention concerne un tendeur hydraulique (1) de moyens de traction permettant un mouvement d'un rail de tension déviant un moyen de traction sans fin. Le tendeur comporte un piston (2) monté à une première extrémité d'un boîtier dont il peut sortir sous l'effet de la pression du fluide hydraulique, et une soupape anti-retour (4) commutable interrompant l'écoulement du fluide hydraulique et montée fixe par rapport au boîtier (3), le boîtier (3) et le piston (2) étant produits sans enlèvement de copeaux dans une tôle déformable. L'invention concerne également un mécanisme à moyen de traction sans fin muni d'un moyen de traction sans fin, par exemple d'une chaîne ou d'une courroie, qui est déviée par un tendeur hydraulique (1) de moyens de traction selon l'invention avec interposition d'un rail de tension.
PCT/DE2015/200407 2014-07-22 2015-07-20 Unité hydraulique de tension de chaînes composée d'éléments déformables Ceased WO2016012019A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014214255.5A DE102014214255A1 (de) 2014-07-22 2014-07-22 Hydraulische Kettenspanneinheit aus Umformteilen
DE102014214255.5 2014-07-22

Publications (1)

Publication Number Publication Date
WO2016012019A1 true WO2016012019A1 (fr) 2016-01-28

Family

ID=53793893

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2015/200407 Ceased WO2016012019A1 (fr) 2014-07-22 2015-07-20 Unité hydraulique de tension de chaînes composée d'éléments déformables

Country Status (2)

Country Link
DE (1) DE102014214255A1 (fr)
WO (1) WO2016012019A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019152285A (ja) * 2018-03-05 2019-09-12 Ntn株式会社 チェーンテンショナ

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017109402A1 (de) * 2017-05-03 2018-11-08 Schaeffler Technologies AG & Co. KG Spannvorrichtung mit umformtechnisch hergestelltem Gehäuse, Zugmitteltrieb mit Spannvorrichtung sowie Herstellverfahren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0908646A1 (fr) * 1997-10-09 1999-04-14 Borg-Warner Automotive, Inc. Tendeur de chaíne hydraulique avec une chemise cupuliforme formée par emboutissage
DE102007037720A1 (de) 2006-08-09 2008-02-14 Tsubakimoto Chain Co. Steuerantrieb
DE102006055467A1 (de) 2006-11-24 2008-05-29 Schaeffler Kg Hydraulische Spanneinheit für Zugmitteltriebe
US20080280711A1 (en) * 2003-12-18 2008-11-13 Seiji Sato Chain Tensioner
DE102010032630A1 (de) 2010-07-29 2012-02-02 Schaeffler Technologies Gmbh & Co. Kg Zugmitteltrieb mit einer Spannvorrichtung in deren Spannkolben eine Pufferkapsel angeordnet ist

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0908646A1 (fr) * 1997-10-09 1999-04-14 Borg-Warner Automotive, Inc. Tendeur de chaíne hydraulique avec une chemise cupuliforme formée par emboutissage
US20080280711A1 (en) * 2003-12-18 2008-11-13 Seiji Sato Chain Tensioner
DE102007037720A1 (de) 2006-08-09 2008-02-14 Tsubakimoto Chain Co. Steuerantrieb
DE102006055467A1 (de) 2006-11-24 2008-05-29 Schaeffler Kg Hydraulische Spanneinheit für Zugmitteltriebe
DE102010032630A1 (de) 2010-07-29 2012-02-02 Schaeffler Technologies Gmbh & Co. Kg Zugmitteltrieb mit einer Spannvorrichtung in deren Spannkolben eine Pufferkapsel angeordnet ist

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019152285A (ja) * 2018-03-05 2019-09-12 Ntn株式会社 チェーンテンショナ
JP7100467B2 (ja) 2018-03-05 2022-07-13 Ntn株式会社 チェーンテンショナ
US11408490B2 (en) * 2018-03-05 2022-08-09 Ntn Corporation Chain tensioner

Also Published As

Publication number Publication date
DE102014214255A1 (de) 2016-01-28

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