WO2009110408A1 - Tendeur de chaîne - Google Patents

Tendeur de chaîne Download PDF

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Publication number
WO2009110408A1
WO2009110408A1 PCT/JP2009/053822 JP2009053822W WO2009110408A1 WO 2009110408 A1 WO2009110408 A1 WO 2009110408A1 JP 2009053822 W JP2009053822 W JP 2009053822W WO 2009110408 A1 WO2009110408 A1 WO 2009110408A1
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WO
WIPO (PCT)
Prior art keywords
housing
plunger
chain
pressure
passage
Prior art date
Application number
PCT/JP2009/053822
Other languages
English (en)
Japanese (ja)
Inventor
嘉昭 漁野
誠二 佐藤
久 早川
智善 井筒
Original Assignee
Ntn株式会社
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 Ntn株式会社 filed Critical Ntn株式会社
Priority to DE112009000471.7T priority Critical patent/DE112009000471B4/de
Publication of WO2009110408A1 publication Critical patent/WO2009110408A1/fr

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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
    • F16H2007/0814—Fluid pressure with valves opening on surplus 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
    • F16H2007/0857—Screw mechanisms
    • 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

  • This invention relates to a chain tensioner used for holding tension of a timing chain that drives a camshaft of an automobile engine.
  • An automobile engine generally transmits the rotation of a crankshaft to a camshaft via a timing chain, and opens and closes a combustion chamber valve by the rotation of the camshaft.
  • a tension adjusting device composed of a chain guide provided so as to be able to swing around a fulcrum shaft and a chain tensioner that presses the chain via the chain guide is often used. It is done.
  • a plunger is slidably inserted into a bottomed cylindrical housing with one end open, and the plunger is a bottomed cylindrical shape with an insertion end into the housing open,
  • An oil supply passage for introducing hydraulic oil is provided in a pressure chamber surrounded by the housing and the plunger, and a check valve for preventing a backflow of the hydraulic oil from the pressure chamber to the oil supply passage is provided at the outlet of the oil supply passage. Is urged in a direction protruding from the housing by a return spring, and the chain is pressed by the protruding end of the plunger from the housing (Patent Documents 1 and 2).
  • protruding direction the direction protruding from the housing
  • the chain tensioner of Patent Document 2 is also provided with a secondary side escape passage connected to the pressure chamber in the plunger, and is opened when the pressure in the pressure chamber becomes higher than a preset pressure in the secondary side escape passage.
  • Secondary side relief valve is installed.
  • the temperature of the hydraulic oil supplied from the oil pump is usually in a range from room temperature to about 100 ° C., but may be 0 ° C. or lower in a cold region or a low temperature environment in winter.
  • the pressure of the hydraulic oil supplied from the oil pump increases, and the pressure in the pressure chamber into which the hydraulic oil flows increases, and the chain may become over-tensioned. It was.
  • the problem to be solved by the present invention is to provide a chain tensioner capable of preventing chain over tension in a low temperature environment.
  • a plunger is slidably inserted into a bottomed cylindrical housing with one end open, and the plunger has a bottomed cylindrical shape with an insertion end into the housing open,
  • An oil supply passage for introducing hydraulic oil is provided in the pressure chamber surrounded by the plunger, and a check valve for preventing backflow of the hydraulic oil from the pressure chamber to the oil supply passage is provided at the outlet of the oil supply passage.
  • a chain tensioner provided with a return spring that urges in the protruding direction and presses the chain with a protruding end from the housing of the plunger, and is provided with a primary side relief passage that branches off from the middle of the oil supply passage.
  • the primary side relief bar that is opened in the relief passage when the pressure in the oil supply passage becomes larger than a preset pressure. Incorporating the drive.
  • the chain tensioner further includes a secondary-side escape passage connected to the pressure chamber, and the secondary-side relief passage is opened when the pressure in the pressure chamber becomes higher than a preset pressure.
  • a side relief valve can be incorporated.
  • this chain tensioner can have the following configuration.
  • a screw rod having an external thread that engages with an internal thread formed on the inner periphery of the housing is provided on the outer periphery, and the external thread and the internal thread receive pressure when a force in the direction of pushing the plunger into the housing is applied.
  • the flank angle of the side flank is formed in a sawtooth shape larger than the flank angle of the play side flank.
  • a register ring that elastically tightens the outer periphery of the plunger is housed in a housing groove formed on the inner periphery of the housing, and the register ring is formed on the outer periphery of the plunger at a constant interval in the axial direction.
  • a tapered surface that engages with a circumferential groove and allows the movement of the plunger by expanding the diameter of the register ring when the plunger is pressed in a direction protruding from the housing in each circumferential groove, and the plunger A stopper surface is provided that locks the register ring to prevent the plunger from moving when it is pushed in the direction of pushing it into the housing.
  • a flange portion is provided on the outer periphery of the housing, the flange portion being fixed to the outer surface of the engine cover in a state where the housing is fitted in the tensioner mounting hole of the engine cover, the flange portion is provided on the mating surface with respect to the engine cover.
  • a flat surface provided on the outer periphery of the housing by opening the outlet of the primary side escape passage and forming an oil passage groove from the outlet of the primary side escape passage to the outer periphery of the housing on the mating surface of the flange portion with the engine cover And an oil passage that communicates with the engine cover through a gap formed between the inner periphery of the tensioner mounting hole.
  • the primary side escape passage is composed of a radial hole extending from the outer periphery of the flange portion to the oil supply passage, and an axial hole extending from the mating surface of the flange portion to the engine cover to the radial hole
  • the primary relief valve can be inserted into the radial hole from the outer periphery of the flange portion and fixed with a set screw.
  • the chain tensioner is preferably added with the following configuration.
  • the check valve has a spherical valve body that opens and closes a valve hole, and the valve body is a ceramic ball or a steel ball coated with a ceramic coating.
  • a diamond-like carbon film is formed on the contact surface of the valve body of the check valve.
  • the primary side relief valve opens to release the hydraulic oil in the oil supply passage, so that the high pressure operation supplied from the oil pump The oil flows into the pressure chamber after reducing the pressure in the oil supply passage. For this reason, an increase in pressure in the pressure chamber is prevented, and the chain is unlikely to be over-tensioned.
  • a secondary side relief passage connected to the pressure chamber is further provided, and the secondary side relief valve is opened in the secondary side relief passage when the pressure in the pressure chamber becomes larger than a preset pressure.
  • the check valve valve body uses a ceramic ball or a steel ball with a ceramic coating, the wear of the valve body due to the soot contained in the hydraulic oil when it is incorporated in a diesel engine. Therefore, the responsiveness of the check valve to pressure fluctuations in the pressure chamber can be ensured over a long period of time.
  • the front view which shows the chain transmission apparatus incorporating the chain tensioner of 1st Embodiment of this invention 1 is an enlarged cross-sectional view near the chain tensioner of FIG. Sectional view along line III-III in FIG. Sectional view along line IV-IV in FIG. Fig. 4 is an enlarged cross-sectional view near the primary relief valve.
  • FIG. 5 is an enlarged sectional view of the vicinity of the screw surface of the set screw.
  • FIG. 1 shows a chain transmission device incorporating a chain tensioner 1 according to a first embodiment of the present invention.
  • a sprocket 3 fixed to the crankshaft 2 of the engine and a sprocket 5 fixed to the camshaft 4 are connected via a chain 6, and the chain 6 rotates the crankshaft 2. This is transmitted to the camshaft 4, and the valve (not shown) of the combustion chamber is opened and closed by the rotation of the camshaft 4.
  • the chain 6 is in contact with a chain guide 8 supported so as to be swingable about the fulcrum shaft 7, and the chain tensioner 1 presses the chain 6 through the chain guide 8.
  • the chain tensioner 1 has a bottomed cylindrical housing 9 with one end opened, and a plunger 10 slidably inserted in the housing 9 in the axial direction.
  • the engine cover 11 is fitted into the tensioner mounting hole 12 with the open end facing the engine cover 11.
  • a flange portion 13 is integrally formed on the outer periphery of the housing 9, and the flange portion 13 is fixed to the outer surface of the engine cover 11 with bolts 14 (see FIGS. 1 and 3).
  • a gasket 15 is sandwiched between the flange portion 13 and the engine cover 11 in order to prevent leakage of hydraulic oil from the chain tensioner 1.
  • the plunger 10 is formed in a bottomed cylindrical shape whose opening end into the housing 9 is opened, and a female screw 16 is formed on the inner periphery thereof. Further, a screw rod 18 having a male screw 17 that engages with the female screw 16 on the outer periphery is inserted into the plunger 10. The screw rod 18 is supported at a protruding end from the plunger 10 by a rod sheet 19 provided at the bottom of the housing 9.
  • the male screw 17 and the female screw 16 are formed in a sawtooth shape in which the flank angle of the pressure side flank 20 that receives pressure when a force in the direction of pushing the plunger 10 into the housing 9 is larger than the flank angle of the play side flank 21.
  • the flank angle of the pressure flank 20 can be 65 °
  • the flank angle of the play flank 21 can be 7 °
  • the flank angle of the pressure flank 20 can be 75 °
  • the flank angle of the side flank 21 can be 15 °.
  • the surface of the screw rod 18 is shot peened, and the surface of the male screw 17 is textured.
  • the surface roughness of the matte surface of the pressure side flank 20 is preferably Ra 1.6 to 12.5, and more preferably Ra 3.2 to 6.3.
  • the satin surface of Ra 1.6 to 12.5 can be formed by shot peening using, for example, a grid of # 46 (167 ⁇ m to 652 ⁇ m, JIS G5903), and a satin surface of Ra 3.2 to 6.3. Can be formed by, for example, shot peening using a 273 ⁇ m grid as a medium.
  • heat treatment for example, carburizing or carbonitriding
  • shot peening is performed before the heat treatment. It should be noted that the surface of the male thread 17 of the conventional chain tensioner is not textured and is formed smoothly.
  • a non-reactive layer that prevents the formation of a lubricating film by the oil additive is formed on the surface of the male screw 17
  • examples of such a non-reactive layer include a non-ferrous metal film (diamond-like carbon (DLC) film).
  • DLC diamond-like carbon
  • the plunger 10 is urged in a direction protruding from the housing 9 by a return spring 22 incorporated between the plunger 10 and the screw rod 18, and a protruding end from the housing 9 is in contact with the chain guide 8.
  • the plunger 10 is also urged in the direction of protruding from the housing 9 by an assist spring 23 incorporated between the plunger 10 and the rod seat 19.
  • an oil supply passage 25 for introducing hydraulic oil from the outside is connected to the pressure chamber 24 surrounded by the housing 9 and the plunger 10.
  • the oil supply passage 25 has an inlet opening at a mating surface of the flange portion 13 with respect to the engine cover 11, and hydraulic oil supplied from an oil pump (not shown) through an oil hole 26 formed in the engine cover 11.
  • the pressure chamber 24 is introduced.
  • a check valve 27 is provided at the outlet of the oil supply passage 25 to prevent backflow of hydraulic oil from the pressure chamber 24 to the oil supply passage 25.
  • the check valve 27 includes a spherical valve body 29 that opens and closes a valve hole 28 formed in the rod seat 19, and a retainer 30 that regulates the movement range of the valve body 29.
  • the valve body 29 of the check valve 27 may employ a steel ball without coating as in a conventional chain tensioner, but it is preferable to employ a ceramic ball or a steel ball with a ceramic coating.
  • the type of ceramic include alumina (AI 2 O 3 ), zirconia (ZrO 2 ), silicon nitride (Si 3 N 4 ), and silicon carbide (SiC).
  • the rod sheet 19 is subjected to heat treatment (for example, carburizing treatment, carbonitriding treatment) and then a diamond-like carbon (DLC) film is formed on the contact surface of the valve body 29.
  • heat treatment for example, carburizing treatment, carbonitriding treatment
  • DLC diamond-like carbon
  • the primary side escape passage 31 includes a radial hole 32 extending from the outer periphery of the flange portion 13 to the oil supply passage 25 and an axial hole 33 extending from the mating surface of the flange portion 13 to the engine cover 11 to the radial hole 32.
  • An outlet is opened in the mating surface of the portion 13 with respect to the engine cover 11.
  • a primary-side relief valve 34 is inserted into the radial hole 32 from the outer periphery of the flange portion 13 and fixed with a set screw 35. As shown in FIG. 6, the set screw 35 has a screw surface coated with a sealant, and prevents hydraulic oil in the radial hole 32 from flowing out from the outer periphery of the flange portion 13.
  • the primary side relief valve 34 includes a valve sleeve 36, a spherical valve body 37 accommodated in the valve sleeve 36, and a valve seat in which the valve body 37 is formed at one end of the valve sleeve 36.
  • a valve spring 39 that is biased toward the valve 38 and a cap 40 that is press-fitted into the other end of the valve sleeve 36.
  • the valve seat 38 is formed with a valve hole 41 that communicates with the radial hole 32.
  • An oil passage hole 42 communicating with the axial hole 33 is formed on the side surface of the sleeve 36.
  • valve body 37 for example, a steel ball can be used.
  • an oil passage groove 43 extending from the outlet of the primary side escape passage 31 to the outer periphery of the housing 9 is formed on the mating surface of the flange portion 13 with respect to the engine cover 11. Further, a flat surface 44 is formed on the outer periphery of the housing 9, and the oil passage groove 43 is formed in the engine cover 11 through a gap formed between the flat surface 44 and the inner periphery of the tensioner mounting hole 12. It communicates with the engine room.
  • the secondary release passage 45 for releasing hydraulic oil in the pressure chamber 24 is connected to the pressure chamber 24.
  • the secondary side escape passage 45 includes a radial hole 47 extending from the outer periphery of the flange portion 13 to the pressure chamber 24, and an axial hole 48 extending from the mating surface of the flange portion 13 to the engine cover 11 to the radial hole 47.
  • An outlet is opened on the mating surface of the flange portion 13 with respect to the engine cover 11.
  • the secondary relief passage 45 incorporates a secondary relief valve 46 that opens when the pressure in the pressure chamber 24 becomes higher than a preset pressure.
  • An oil passage groove 49 extending from the outlet of the secondary side escape passage 45 to the outer periphery of the housing 9 is formed on the mating surface of the flange portion 13 with respect to the engine cover 11. Further, a flat surface 50 is formed on the outer periphery of the housing 9, and an oil passage groove 49 is formed in the engine cover 11 through a gap formed between the flat surface 50 and the inner periphery of the tensioner mounting hole 12. Communicating with
  • the plunger 10 moves in the pushing direction by the tension of the chain 6 and absorbs the tension of the chain 6.
  • the screw rod 18 rotates with respect to the plunger 10 while repeating forward and backward movements within the gap between the female screw 16 and the male screw 17 due to the vibration of the chain 6.
  • the hydraulic oil in the pressure chamber 24 flows out into the engine room through the leak gap 51 between the sliding surface of the plunger 10 and the housing 9 and a damper action occurs, the plunger 10 moves slowly.
  • the tension of the chain 6 may increase depending on the stop position of a cam (not shown) connected to the camshaft 4.
  • the chain 6 does not vibrate, so the pressure side of the internal thread 16 of the plunger 10
  • the flank 20 is received by the pressure side flank 20 of the male screw 17 of the screw rod 18, and the position of the plunger 10 is fixed. Therefore, when the engine is restarted, the chain 6 is hardly slackened, and the engine can be started smoothly.
  • the chain tensioner 1 opens the primary side relief valve 34 when the pressure in the oil supply passage 25 becomes high under a low temperature environment, and releases the hydraulic oil in the oil supply passage 25.
  • the supplied high-pressure hydraulic oil flows into the pressure chamber 24 after the pressure is reduced in the oil supply passage 25. For this reason, an increase in pressure in the pressure chamber 24 is prevented, and the chain 6 is unlikely to be over-tensioned.
  • the chain tensioner 1 slips when the engine is stopped as compared to the case where there is no matte between the pressure side flank 20, 20 of the male screw 17 and the female screw 16. It is hard to occur and the position of the plunger 10 can be fixed reliably.
  • the chain tensioner 1 uses oil (so-called FM oil) to which molybdenum dithiocarbamate (MoDTC) or molybdenum dithiophosphate (MoDTP) is added as hydraulic oil when a non-reactive layer is provided on the surface of the male screw 17.
  • FM oil oil
  • MoDTC molybdenum dithiocarbamate
  • MoDTP molybdenum dithiophosphate
  • a lubricating film containing molybdenum disulfide (MoS 2 ) is hardly formed on the surface of the male screw 17, and it is possible to reliably prevent slippage between the pressure side flank 20, 20 of the male screw 17 and the female screw 16. Can do.
  • FIG. 7 shows a chain tensioner 61 according to a second embodiment of the present invention. Portions corresponding to the first embodiment are denoted by the same reference numerals and description thereof is omitted.
  • a housing groove 63 for housing the register ring 62 is formed on the inner periphery of the open end of the housing 9, and the register ring 62 housed in the housing groove 63 elastically tightens the outer periphery of the plunger 10.
  • a plurality of circumferential grooves 64 are formed on the outer periphery of the plunger 10 at regular intervals in the axial direction, and the register ring 62 is engaged with the circumferential grooves 64.
  • each circumferential groove 64 when the plunger 10 is pressed in a direction protruding from the housing 9, the diameter of the register ring 62 is increased to allow the plunger 10 to move, and the plunger 10 is placed in the housing 9. Is provided with a stopper surface 66 that locks the register ring 62 and prevents the plunger 10 from moving when the chain 6 is pushed in the direction in which the chain 6 is pushed. The engagement of the groove 64 and the register ring 62 restricts the movement of the plunger 10 in the pushing direction.
  • a check valve 67 is provided at the outlet of the oil supply passage 25 to prevent backflow of hydraulic oil from the pressure chamber 24 to the oil supply passage 25.
  • the check valve 67 includes a valve seat 68 provided at the bottom of the housing 9, a spherical valve body 70 that opens and closes a valve hole 69 formed in the valve seat 68, and a retainer 71 that regulates the movement range of the valve body 70. Consists of.
  • the valve body 70 may adopt a steel ball without coating as in a conventional chain tensioner. However, if a ceramic ball or a steel ball with a ceramic coating is adopted, the valve body 70 is used in a diesel engine.
  • the chain tensioner 61 When the chain tensioner 61 is incorporated, it is possible to suppress wear of the valve body 70 due to a suit (soot) included in the hydraulic oil.
  • the valve seat 68 is subjected to heat treatment (for example, carburizing treatment, carbonitriding treatment) and a diamond-like carbon (DLC) film is formed on the contact surface of the valve body 70, the chain tensioner 61 is attached to the diesel engine.
  • heat treatment for example, carburizing treatment, carbonitriding treatment
  • DLC diamond-like carbon
  • the chain tensioner 61 opens the primary side relief valve 34 to release the hydraulic oil in the oil supply passage 25 when the pressure in the oil supply passage 25 becomes high under a low temperature environment.
  • the high-pressure hydraulic oil supplied from the oil pump flows into the pressure chamber 24 after reducing the pressure in the oil supply passage 25. For this reason, an increase in pressure in the pressure chamber 24 is prevented, and the chain 6 is unlikely to be over-tensioned.

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  • 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 de chaîne permettant d'empêcher la tension excessive d'une chaîne dans des environnements basse température. Dans le tendeur de chaîne, dans lequel un piston (10) est inséré de manière coulissante dans un logement cylindrique à extrémité fermée (9), un passage d'alimentation en huile (25), via lequel de l'huile de service est introduite, est disposé à l'intérieur d'une chambre de compression (24), qui est entourée du logement (9) et du piston (10). Un clapet de non-retour (27) est disposé à la sortie du passage d'alimentation en huile (25), et un ressort de rappel (22) est prévu pour fournir de l'énergie dans une certaine direction pour amener le piston (10) à faire saillie depuis le logement (9), de sorte qu'une chaîne (6) soit pressée par l'extrémité du piston (10) qui fait saillie depuis le logement (9). Un passage d'évacuation principal (31), qui part du milieu du passage d'alimentation en huile (25), est prévu, et un clapet de décharge principal (34), qui s'ouvre lorsque la pression à l'intérieur du passage d'alimentation en huile (25) devient supérieure à une pression prédéterminée, est incorporé dans le passage d'évacuation principal (31).
PCT/JP2009/053822 2008-03-06 2009-03-02 Tendeur de chaîne WO2009110408A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112009000471.7T DE112009000471B4 (de) 2008-03-06 2009-03-02 Kettenspanner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008055860A JP5316927B2 (ja) 2008-03-06 2008-03-06 チェーンテンショナ
JP2008-055860 2008-03-06

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WO2009110408A1 true WO2009110408A1 (fr) 2009-09-11

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JP (1) JP5316927B2 (fr)
DE (1) DE112009000471B4 (fr)
WO (1) WO2009110408A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5926002B2 (ja) * 2011-06-08 2016-05-25 Ntn株式会社 チェーンテンショナ
JP6408975B2 (ja) * 2015-11-10 2018-10-17 株式会社椿本チエイン チェーンテンショナ
DE102017003549A1 (de) 2017-04-12 2018-10-18 Daimler Ag Kettenspanner zum Spannen einer Antriebskette einer Verbrennungskraftmaschine
JP6978359B2 (ja) * 2018-03-22 2021-12-08 東芝キヤリア株式会社 密閉型圧縮機及び冷凍サイクル装置
JP2022138972A (ja) * 2021-03-11 2022-09-26 Ntn株式会社 チェーンテンショナ

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504251A (en) * 1981-11-13 1985-03-12 Dr. Ing. H.C.F. Porsche A.G. Hydraulic chain tensioner
JPH0599095A (ja) * 1991-10-01 1993-04-20 Hitachi Ltd 電磁式燃料噴射弁
JP2002098025A (ja) * 2000-09-27 2002-04-05 Toshiba Corp セラミックスチェックボールおよびそれを用いたポンプ部品
JP2006017214A (ja) * 2004-07-01 2006-01-19 Ntn Corp ２輪車エンジン用チェーンテンショナ
JP2007303477A (ja) * 2006-05-08 2007-11-22 Motoyama Eng Works Ltd 偏心形回転弁
JP2007333095A (ja) * 2006-06-15 2007-12-27 Ntn Corp チェーンテンショナの取付け装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3217632A1 (de) 1982-05-11 1983-11-17 Porsche Ag Hydraulischer kettenspanner
EP0756108A3 (fr) 1995-07-24 1998-08-26 Ford Motor Company Limited Tendeur de chaíne hydraulique pour moteur de véhicule automobile
JP4243793B2 (ja) 2002-11-27 2009-03-25 Ｎｔｎ株式会社 チェーンテンショナ
JP3962054B2 (ja) 2004-11-22 2007-08-22 株式会社椿本チエイン 脱気型油圧テンショナ
JP2006292047A (ja) 2005-04-08 2006-10-26 Ntn Corp 油圧式テンショナ
DE102007023671B4 (de) 2006-06-15 2023-03-16 Ntn Corp. Kettenspannvorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504251A (en) * 1981-11-13 1985-03-12 Dr. Ing. H.C.F. Porsche A.G. Hydraulic chain tensioner
JPH0599095A (ja) * 1991-10-01 1993-04-20 Hitachi Ltd 電磁式燃料噴射弁
JP2002098025A (ja) * 2000-09-27 2002-04-05 Toshiba Corp セラミックスチェックボールおよびそれを用いたポンプ部品
JP2006017214A (ja) * 2004-07-01 2006-01-19 Ntn Corp ２輪車エンジン用チェーンテンショナ
JP2007303477A (ja) * 2006-05-08 2007-11-22 Motoyama Eng Works Ltd 偏心形回転弁
JP2007333095A (ja) * 2006-06-15 2007-12-27 Ntn Corp チェーンテンショナの取付け装置

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DE112009000471B4 (de) 2021-09-23
JP5316927B2 (ja) 2013-10-16
JP2009210088A (ja) 2009-09-17
DE112009000471T5 (de) 2011-04-07

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