WO2009075219A1 - Chain tensioner - Google Patents

Chain tensioner Download PDF

Info

Publication number
WO2009075219A1
WO2009075219A1 PCT/JP2008/072034 JP2008072034W WO2009075219A1 WO 2009075219 A1 WO2009075219 A1 WO 2009075219A1 JP 2008072034 W JP2008072034 W JP 2008072034W WO 2009075219 A1 WO2009075219 A1 WO 2009075219A1
Authority
WO
WIPO (PCT)
Prior art keywords
plunger
flank
cylinder
female thread
chain tensioner
Prior art date
Application number
PCT/JP2008/072034
Other languages
French (fr)
Japanese (ja)
Inventor
Seiji Sato
Akiko Shiotani
Yoshiaki Ryouno
Hisashi Hayakawa
Original Assignee
Ntn Corporation
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
Priority claimed from JP2008186108A external-priority patent/JP5316931B2/en
Application filed by Ntn Corporation filed Critical Ntn Corporation
Publication of WO2009075219A1 publication Critical patent/WO2009075219A1/en

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
    • 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

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

A chain tensioner in which the position of a plunger can be reliably fixed when the engine is being stopped. In a chain tensioner (1), a plunger (10) is slidably inserted in a cylinder (9). The plunger (10) is formed in a tubular shape having an insertion end inserted in the cylinder (9), and the inner periphery of the insertion end has a female thread (16). A screw rod (18) having on its outer periphery a male thread (17) engaging with the female thread (16) is provided in the cylinder (9). The male thread (17) and the female thread (16) have a sawtooth shape in which the flank angle α of a pressure flank (19) is greater than the flank angle β of a clearance flank (20). A return spring (21) mounted between the plunger (10) and the screw rod (18) urges the plunger (10) in the direction in which the plunger (10) projects from the cylinder (9), and the plunger (10) presses the chain (6). At least one of the pressure flank (19) of the male thread (17) and the pressure flank (19) of the female thread (16) is mat finished.
PCT/JP2008/072034 2007-12-10 2008-12-04 Chain tensioner WO2009075219A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007318047 2007-12-10
JP2007-318047 2007-12-10
JP2008-186108 2008-07-17
JP2008186108A JP5316931B2 (en) 2007-12-10 2008-07-17 Chain tensioner

Publications (1)

Publication Number Publication Date
WO2009075219A1 true WO2009075219A1 (en) 2009-06-18

Family

ID=40755463

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/072034 WO2009075219A1 (en) 2007-12-10 2008-12-04 Chain tensioner

Country Status (1)

Country Link
WO (1) WO2009075219A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108317228A (en) * 2017-01-16 2018-07-24 Ntn株式会社 Chain tensioning device
CN108884914A (en) * 2016-03-17 2018-11-23 Ntn株式会社 Chain tensioning device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004245242A (en) * 2003-02-10 2004-09-02 Ntn Corp Chain tensioner
JP2007032603A (en) * 2005-07-22 2007-02-08 Ntn Corp Chain tensioner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004245242A (en) * 2003-02-10 2004-09-02 Ntn Corp Chain tensioner
JP2007032603A (en) * 2005-07-22 2007-02-08 Ntn Corp Chain tensioner

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108884914A (en) * 2016-03-17 2018-11-23 Ntn株式会社 Chain tensioning device
EP3431814A4 (en) * 2016-03-17 2019-01-23 NTN Corporation Chain tensioner
CN108317228A (en) * 2017-01-16 2018-07-24 Ntn株式会社 Chain tensioning device
EP3569893A4 (en) * 2017-01-16 2020-01-08 NTN Corporation Chain tensioner
US11231091B2 (en) 2017-01-16 2022-01-25 Ntn Corporation Chain tensioner
CN108317228B (en) * 2017-01-16 2022-10-28 Ntn株式会社 Chain tensioner

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