WO2015162659A1 - Limiteur de couple - Google Patents

Limiteur de couple Download PDF

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Publication number
WO2015162659A1
WO2015162659A1 PCT/JP2014/061124 JP2014061124W WO2015162659A1 WO 2015162659 A1 WO2015162659 A1 WO 2015162659A1 JP 2014061124 W JP2014061124 W JP 2014061124W WO 2015162659 A1 WO2015162659 A1 WO 2015162659A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring member
inner ring
coil spring
torque limiter
torque
Prior art date
Application number
PCT/JP2014/061124
Other languages
English (en)
Japanese (ja)
Inventor
太郎 磯部
俊一 渡邉
勇 森本
晴日 井内
Original Assignee
オリジン電気株式会社
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 オリジン電気株式会社 filed Critical オリジン電気株式会社
Priority to JP2015554913A priority Critical patent/JP5972483B2/ja
Priority to PCT/JP2014/061124 priority patent/WO2015162659A1/fr
Publication of WO2015162659A1 publication Critical patent/WO2015162659A1/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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/08—Friction clutches with a helical band or equivalent member, which may be built up from linked parts, with more than one turn embracing a drum or the like, with or without an additional clutch actuating the end of the band
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/20—Freewheels or freewheel clutches with expandable or contractable clamping ring or band

Definitions

  • the present invention relates to a torque limiter that transmits torque below a predetermined value and blocks transmission of torque exceeding a predetermined value.
  • the contact type torque limiter is generally composed of four parts: an inner ring member, a coil spring, an outer ring member, and a sealing member ( Patent Document 1).
  • a coil spring is tightly fitted on the outer periphery of the inner ring member and fixed to the outer ring member, and a predetermined rotational torque is obtained by mechanical friction between the inner ring member and the coil spring.
  • the inner ring member is usually made of metal, but there is also a torque limiter made of resin (for example, see Patent Document 2).
  • the torque limiter using a metal inner ring member is usually made of an iron-based sintered alloy, so the cost is high and a certain thickness is required for molding. Is difficult.
  • a torque limiter using a resin inner ring member it is necessary to use a grade resin in which a large amount of carbon (carbon fiber) is added to the PPS resin in order to maintain wear resistance, leading to an increase in cost.
  • the applicant of the present invention presses metal to form an inner ring member, provides a coil spring so as to generate a frictional force with the outer surface of the inner ring member, provides an outer ring member on the outer side of the inner ring member,
  • a torque limiter that locks the end of the coil spring on the peripheral surface and supports the inner ring member was developed, and a patent application was filed as Japanese Patent Application No. 2013-12813.
  • This torque limiter is inexpensive and can reduce the diameter of the inner ring member, but it also wants to improve wear resistance between the inner ring member and the coil spring to improve durability and reduce torque fluctuations. There is a request.
  • An object of the present invention is to provide a torque limiter capable of improving the durability of an inner ring member and further reducing torque fluctuations.
  • the invention according to claim 1 of the present invention includes an inner ring member formed by press-molding a metal, a coil spring provided so as to generate a frictional force between an outer surface of the inner ring member, and an outer surface of the inner ring member.
  • the invention according to claim 2 of the present invention is the invention of claim 1, wherein the inner ring member has a two-stage throttle shape in which the outer diameter of the front stage is smaller than the outer diameter of the rear stage, and the end of the rear stage has a trumpet shape.
  • the outer ring member is configured to support the front stage part and the rear stage part of the two-stage throttle shape of the inner ring member on the inner peripheral surface, and to be fitted to a trumpet-shaped maximum diameter part of the inner ring member.
  • a fitting claw for supporting the member is provided.
  • the invention according to claim 3 of the present invention is characterized in that, in the invention of claim 1 or 2, the coil spring is formed by winding a piano wire and barrel-polishing after heat treatment.
  • the wear resistance between the inner ring member and the coil spring can be improved.
  • the durability of can be improved.
  • the outer ring member supports the front and rear stages of the inner ring member in the two-stage throttle shape on the inner peripheral surface and is fitted with the trumpet-shaped maximum diameter portion of the inner ring member so that the inner ring member is fitted to the inner peripheral surface of the outer ring member. Since it can support in two places, an inner ring member can be supported stably and a shield member becomes unnecessary. Furthermore, since the coil spring is formed by winding a piano wire and is barrel-polished after the heat treatment, the torque fluctuation can be reduced.
  • FIG. 1 is a cross-sectional view of a torque limiter according to an embodiment of the present invention.
  • the torque limiter according to the embodiment of the present invention includes an inner ring member 11, a coil spring 12, and an outer ring member 13.
  • the inner ring member 11 is formed by press-molding metal into a two-stage drawn shape in which the outer diameter of the front stage part 14 is smaller than the outer diameter of the rear stage part 15.
  • latter stage part 15 is formed in the trumpet shape, and has the trumpet-shaped part 16 extended in the trumpet shape.
  • the front stage part 14 and the rear stage part 15 of the inner ring member 11 are formed in a cylindrical shape, and have a through hole 17 for allowing a shaft (not shown) to pass therethrough and an engagement hole 18 for engaging with an engagement piece of the shaft. Yes.
  • the shaft is inserted into the through hole 17, the engagement piece of the shaft is engaged with the engagement hole 18, and the rotation of the shaft is transmitted to the inner ring member 11.
  • the coil spring 12 is provided so as to generate a frictional force with the outer surface of the inner ring member 11.
  • the inner ring member 11 is provided in contact with the outer surface of the front stage portion 14 having a small outer diameter, and the end portion of the coil spring 12 is locked to the outer ring member 13 by the locking portion 19 on the inner peripheral surface of the outer ring member 13.
  • Lubricating oil for lubricating the contact surface is applied to the contact surface between the outer surface of the inner ring member 11 and the coil spring 12.
  • This lubricating oil is a linear fluorine grease having a kinematic viscosity of a predetermined value or less, thereby improving the wear resistance between the inner ring member 11 and the coil spring 12 and improving the durability of the inner ring member.
  • the wear resistance of the inner ring member 11 by the lubricating oil will be described later.
  • the coil spring 12 is formed by winding a piano wire, and is formed by barrel polishing after heat treatment. Thereby, the torque fluctuation generated in the inner ring member 11 by the coil spring 12 is reduced. The reduction in torque fluctuation generated in the inner ring member 11 by the coil spring 12 will be described later.
  • the outer ring member 13 is provided on the outer side of the inner ring member 11 so as to cover the coil spring 12, and as described above, the end portion of the coil spring 12 is locked by the locking portion 19 on the inner peripheral surface of the outer ring member 13. Further, the inner peripheral surface of the outer ring member 13 and a part of the front step portion 14 of the inner ring member 11 come into contact with each other to form the first support surface 20, and the inner peripheral surface of the outer ring member 13 and a part of the rear step portion 15 of the inner ring member 11 becomes the second support surface 21 in contact with each other. As a result, the outer ring member 13 supports the inner ring member 11 at two locations of the first support surface 20 and the second support surface 21, and the outer ring member 13 can stably support the inner ring member 11.
  • the outer ring member 13 has a fitting claw 22 that fits the maximum diameter portion of the trumpet-shaped portion 16 of the inner ring member 11 and supports the inner ring member 11.
  • the fitting claws 22 since the maximum diameter portion of the trumpet-shaped portion 16 of the inner ring member 11 is supported on the outer ring member 13 by the fitting claws 22, no shield member is required.
  • the outer ring member 13 is provided with a fixing portion 23 for fixing the outer ring member 13, and this fixing portion 23 is a device to which a torque limiter is attached, for example, a paper feed mechanism portion of a printer or a copying machine. To be fixed to. As a result, the outer ring member 13 is fixed, and the inner ring member 11 penetrating the shaft engages with the coil spring 12 to transmit and block torque.
  • the coil spring 12 locked to the locking portion 19 on the inner peripheral surface of the outer ring member 13 is between the outer surface of the inner ring member 11. Generates frictional force to transmit shaft torque.
  • the coil spring 12 slips between the outer surface of the inner ring member 11 and interrupts the transmission of the excessive torque.
  • FIG. 2 is a left side view of the torque limiter according to the embodiment of the present invention.
  • a fixing portion 23 for fixing the outer ring member 13 is provided on the left side surface portion of the torque limiter according to the embodiment of the present invention.
  • the fixing portion 23 is mounted with a torque limiter. Connected and fixed to the device.
  • FIG. 3 is a right side view of the torque limiter according to the embodiment of the present invention.
  • the right side surface portion of the torque limiter according to the embodiment of the present invention has an engagement hole 18 for locking the shaft inserted into the through hole 17, and the shaft is a through hole.
  • the engaging piece of the shaft engages with the engaging hole 18, and the rotation of the shaft is transmitted to the inner ring member 11.
  • FIG. 4 is a perspective view of the inner ring member of the torque limiter according to the embodiment of the present invention.
  • the inner ring member 11 is formed by press-molding metal. By using the press-molded metal inner ring member 11, the part can be thinned to reduce the diameter and the price.
  • a metal suitable for press forming soft metal
  • an SPCC material inexpensive iron material
  • barrel polishing is performed after the nitriding treatment (surface hardening treatment) to remove the oxidized layer on the surface and the durability is improved. Improve sexiness.
  • the inner ring member 11 is shaped in two stages of the front stage part 14 and the rear stage part 15 so that the inner ring member 11 is not subjected to a radial load or an unintended uneven load.
  • the shape of the diaphragm is such that the torque limiter performance is not impaired as a support structure at two locations by the outer ring member 13.
  • a trumpet-shaped portion 16 is formed that widens the end portion of the rear-stage portion 15 in a trumpet shape, and a notch portion 24 is provided in the maximum diameter portion of the trumpet-shaped portion 16 so that the outer ring member 13 can be easily fitted.
  • the shield member can be omitted.
  • FIG. 5 is a perspective view of a state in which the inner ring member 11 of the torque limiter according to the embodiment of the present invention is fitted to the outer ring member 13.
  • the notch portion 24 of the inner ring member 11 and the fitting claw 22 of the outer ring member 13 are aligned, the inner ring member 11 is inserted into the outer ring member 13, and then The inner ring member 11 is rotated in either the clockwise direction or the counterclockwise direction, and the inner ring member 11 and the outer ring member 13 are locked by the fitting claws 22. Thereby, it is possible to prevent the inner ring member 11 from falling off the outer ring member 13.
  • the notch 24 is not necessarily provided.
  • the outer ring member 13 itself is flexible, when the inner ring member 11 is fitted to the outer ring member 13, the maximum diameter portion of the trumpet-shaped portion 16 of the inner ring member 11 is caused by the bending of the outer ring member 13. This is because it can be fitted to the inner peripheral surface of the member 13.
  • FIG. 6 is a graph showing the relationship between the durability of the inner ring member 11 and the base oil kinematic viscosity of the lubricating oil with the lubricating oil as a parameter.
  • the vertical axis represents the durability (number of rotations) of the inner ring member 11
  • the horizontal axis represents the base oil kinematic viscosity of the lubricating oil when the temperature is 40 ° C.
  • the durability (number of rotations) of the inner ring member 11 on the vertical axis indicates the number of rotations of the inner ring member 11 that can maintain a usable state as the inner ring member 11.
  • the black diamonds in FIG. 6 are data in the case of linear fluorine grease as the base oil of the lubricating oil
  • the point A1 is the data when the base oil kinematic viscosity of the linear fluorine grease is 25 cst (40 ° C.)
  • the point A2 Is the data when the base oil kinematic viscosity of the linear fluorine grease is 90 cst (40 ° C)
  • point A3 is the data when the base oil kinematic viscosity of the linear fluorine grease is 100 cst (40 ° C)
  • the point A4 is straight It is data when the base oil kinematic viscosity of the chain fluorine grease is 140 cst (40 ° C.).
  • the black circles in FIG. 6 are data in the case of mixed fluorine grease of linear fluorine grease and side chain fluorine grease as the base oil of the lubricating oil, and point B1 indicates that the base oil kinematic viscosity of the mixed fluorine grease is 45 cst.
  • Data at (40 ° C.) point B2 is data when the base oil kinematic viscosity of the mixed fluorine grease is 200 cst (40 ° C.).
  • the durability (number of rotations) of the inner ring member 11 is 15.5 million times (A1 point), and the base oil kinematic viscosity of the linear fluorine grease is 90 cst.
  • the durability (the number of rotations) of the inner ring member 11 at (40 ° C.) is 11.28 million times (A2 point), and the durability of the inner ring member 11 when the base oil kinematic viscosity of the linear fluorine grease is 100 cst (40 ° C.).
  • the durability (number of rotations) is 5 million times (A3 points), and the durability (number of rotations) of the inner ring member 11 is 3 million times (A4 points) when the base oil kinematic viscosity of the linear fluorine grease is 140 cst (40 ° C).
  • the durability (number of rotations) of the inner ring member 11 when the base oil kinematic viscosity of the mixed fluorine grease is 45 cst (40 ° C.) is 8 million times (point B1), and the base oil kinematic viscosity of the mixed fluorine grease is 200 cst.
  • the durability (number of rotations) of the inner ring member 11 at (40 ° C.) is 2.4 million times (B2 points) It is.
  • linear fluorine grease having a base oil kinematic viscosity of a predetermined value or less is used. Specifically, linear fluorine grease having a base oil kinematic viscosity of 90 cst or less is used. Preferably, linear fluorine grease having a base oil kinematic viscosity of 25 cst (40 ° C.) is used.
  • FIG. 7 is a graph showing the relationship between the torque value generated in the inner ring member 11 by the coil spring 12 and the number of cycles used, and FIG. 7A shows the case of the coil spring according to the embodiment of the present invention in which barrel polishing is performed after heat treatment.
  • FIG. 7B is a graph for a conventional coil spring that is not subjected to barrel polishing after heat treatment.
  • black diamonds are data of static torque values that are the torque at which movement starts from a stationary state
  • black squares are data of dynamic torque values that are torques when moving.
  • a curve S11 is a curve connecting static torque values
  • a curve S12 is a curve connecting dynamic torque values.
  • black diamonds are data of static torque values
  • black squares are data of dynamic torque values
  • a curve S21 is a curve connecting static torque values
  • a curve S22 is a curve connecting dynamic torque values.
  • the coil spring 12 formed by winding a piano wire and heat-treated is subjected to barrel polishing after the heat treatment.
  • the molded product formed by winding the piano wire is heat-treated (tempered) in order to stabilize the shape of the coil spring and reduce the initial torque fluctuation, and in that case, an oxide scale is generated.
  • the barrel polishing is performed in order to remove oxide scale generated by the heat treatment. By removing the oxidized scale, the torque fluctuation generated in the inner ring member 11 by the coil spring 12 can be reduced.
  • the inner ring member 11 is formed by press-molding metal into a two-stage drawn shape in which the outer diameter of the front stage 14 is smaller than the outer diameter of the rear stage 15, and the end of the rear stage 15 is a trumpet shape.
  • the trumpet-shaped portion 16 is formed to have a kinematic viscosity of not more than a predetermined value even for a torque limiter including the inner ring member 11 that does not have the trumpet-shaped portion 16 instead of the two-stage throttle shape.
  • the durability of the inner ring member can be improved by applying chain-based fluorine grease, and torque fluctuation can be reduced by using the coil spring 12 that has been subjected to barrel polishing after heat treatment.
  • SYMBOLS 11 Inner ring member, 12 ... Coil spring, 13 ... Outer ring member, 14 ... Front stage part, 15 ... Rear stage part, 16 ... Trumpet-like part, 17 ... Through-hole, 18 ... Engagement hole, 19 ... Locking part, 20th DESCRIPTION OF SYMBOLS 1 Support surface, 21 ... 2nd support surface, 22 ... Fitting nail

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Power Steering Mechanism (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un limiteur de couple avec lequel il est possible d'améliorer la durabilité d'un élément de bague intérieure et de réduire la variation du couple. La solution de l'invention concerne un ressort hélicoïdal (12) qui est enroulé autour d'un élément de bague intérieure (11), formé par pression de métal, de manière à créer une force de frottement avec la surface extérieure de l'élément de bague intérieure (11) ; un élément de bague extérieure (13) prévu sur le côté extérieur de l'élément de bague intérieure (11) qui verrouille une extrémité du ressort hélicoïdal (12) sur la surface périphérique intérieure de l'élément de bague extérieure (13) et supporte l'élément de bague intérieure (11) ; et l'espace entre la surface extérieure de l'élément de bague intérieure (11) et le ressort hélicoïdal (12) qui est revêtu à l'aide d'une graisse de fluor à chaîne linéaire présentant une viscosité dynamique inférieure ou égale à une valeur prescrite pour lubrifier les surfaces de contact de ceux-ci.
PCT/JP2014/061124 2014-04-21 2014-04-21 Limiteur de couple WO2015162659A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2015554913A JP5972483B2 (ja) 2014-04-21 2014-04-21 トルクリミッタ
PCT/JP2014/061124 WO2015162659A1 (fr) 2014-04-21 2014-04-21 Limiteur de couple

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/061124 WO2015162659A1 (fr) 2014-04-21 2014-04-21 Limiteur de couple

Publications (1)

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WO2015162659A1 true WO2015162659A1 (fr) 2015-10-29

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PCT/JP2014/061124 WO2015162659A1 (fr) 2014-04-21 2014-04-21 Limiteur de couple

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JP (1) JP5972483B2 (fr)
WO (1) WO2015162659A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6122191B1 (ja) * 2016-07-26 2017-04-26 オリジン電気株式会社 潤滑グリース組成物
CN110312880A (zh) * 2017-03-30 2019-10-08 三之星机带株式会社 带轮结构体及带轮结构体的制造方法
WO2021065022A1 (fr) * 2019-10-01 2021-04-08 株式会社オリジン Limiteur de couple bidirectionnel
US11274739B2 (en) 2017-03-30 2022-03-15 Mitsuboshi Belting Ltd. Pulley structure and method for manufacturing pulley structure
CN114466980A (zh) * 2019-10-01 2022-05-10 株式会社欧利生 双向转矩限制器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7088993B2 (ja) * 2020-08-18 2022-06-21 株式会社オリジン ダンパー

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005121145A (ja) * 2003-10-17 2005-05-12 Ntn Corp トルクリミッタ
JP2006131874A (ja) * 2004-10-08 2006-05-25 Matsushita Electric Ind Co Ltd 潤滑剤および磁気記録媒体
JP2007517168A (ja) * 2003-12-09 2007-06-28 ライテンズ オートモーティブ パートナーシップ オルタネータデカプラのオーバランのためのスプリング移動制限器
JP2007247738A (ja) * 2006-03-15 2007-09-27 Origin Electric Co Ltd 入出力伝達部品及びその製造方法
JP2013504028A (ja) * 2009-09-17 2013-02-04 ザ ゲイツ コーポレイション アイソレータ・デカップラ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005121145A (ja) * 2003-10-17 2005-05-12 Ntn Corp トルクリミッタ
JP2007517168A (ja) * 2003-12-09 2007-06-28 ライテンズ オートモーティブ パートナーシップ オルタネータデカプラのオーバランのためのスプリング移動制限器
JP2006131874A (ja) * 2004-10-08 2006-05-25 Matsushita Electric Ind Co Ltd 潤滑剤および磁気記録媒体
JP2007247738A (ja) * 2006-03-15 2007-09-27 Origin Electric Co Ltd 入出力伝達部品及びその製造方法
JP2013504028A (ja) * 2009-09-17 2013-02-04 ザ ゲイツ コーポレイション アイソレータ・デカップラ

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6122191B1 (ja) * 2016-07-26 2017-04-26 オリジン電気株式会社 潤滑グリース組成物
JP2018016686A (ja) * 2016-07-26 2018-02-01 オリジン電気株式会社 潤滑グリース組成物
CN110312880A (zh) * 2017-03-30 2019-10-08 三之星机带株式会社 带轮结构体及带轮结构体的制造方法
US11274739B2 (en) 2017-03-30 2022-03-15 Mitsuboshi Belting Ltd. Pulley structure and method for manufacturing pulley structure
WO2021065022A1 (fr) * 2019-10-01 2021-04-08 株式会社オリジン Limiteur de couple bidirectionnel
CN114466980A (zh) * 2019-10-01 2022-05-10 株式会社欧利生 双向转矩限制器
US11598379B2 (en) 2019-10-01 2023-03-07 Origin Company, Limited Bidirectional torque limiter
CN114466980B (zh) * 2019-10-01 2023-07-04 株式会社欧利生 双向转矩限制器

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JP5972483B2 (ja) 2016-08-17
JPWO2015162659A1 (ja) 2017-04-13

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