WO2011069330A1 - Structure de roue libre de type à appui - Google Patents

Structure de roue libre de type à appui Download PDF

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Publication number
WO2011069330A1
WO2011069330A1 PCT/CN2010/001970 CN2010001970W WO2011069330A1 WO 2011069330 A1 WO2011069330 A1 WO 2011069330A1 CN 2010001970 W CN2010001970 W CN 2010001970W WO 2011069330 A1 WO2011069330 A1 WO 2011069330A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
star wheel
outer ring
concave curved
overrunning clutch
Prior art date
Application number
PCT/CN2010/001970
Other languages
English (en)
Chinese (zh)
Inventor
陈菊花
Original Assignee
Chen Juhua
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 Chen Juhua filed Critical Chen Juhua
Priority to US13/381,667 priority Critical patent/US20120132496A1/en
Publication of WO2011069330A1 publication Critical patent/WO2011069330A1/fr

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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical

Definitions

  • the invention discloses a bearing type overrunning clutch structure, which belongs to the technical field of clutch manufacturing according to the International Patent Classification Table (IPC), and particularly relates to a novel structure of a loader two-shaft assembly overrunning clutch.
  • IPC International Patent Classification Table
  • Overrunning clutch also known as a one-way clutch or one-way bearing, is a device that can only transfer power from one steering.
  • the speed of the active raceway is the same as the speed of the driven raceway, when the speed of the active raceway is less than the speed of the driven raceway, the driven raceway can rotate freely.
  • the current overrunning clutches are mainly of the roller type overrunning clutch and the wedge type overrunning clutch.
  • the overrunning clutch is an extremely important component in the loader gearbox assembly. At present, most of the loader gearbox assemblies use conventional roller type overrunning clutches.
  • the general structure of the roller type overrunning clutch is mainly composed of inner ring cams, rollers, cylindrical springs, spacer rings and gland parts. When the clutch is combined, due to the structural limitation and synchronization, the number of effective working rollers is small. The working plane of the inner ring cam of the clutch is in line contact with the roller, and the surface compressive stress is too large to form an arc pit, and the friction angle is rapidly increased. Large, causing the clutch to slip and fail.
  • Chinese patent document CN 2708031 discloses an overrunning clutch including an outer ring, a star wheel, a roller and an elastic device.
  • the elastic device is installed in the hole on the tooth side of the star wheel, and pushes the roller to slide on the star wheel, and further includes a a slider that slides integrally with the roller on the star wheel and is engaged with the inner wall of the outer ring by the elastic device; further, the Chinese patent document CN 101629606 provides a multi-roller overrunning clutch having at least six rollers.
  • the spring piece has an elastic bayonet at one end, and the other end has a circular arc end portion adapted to the outer circular surface of the roller, and the elastic snap ring of the spring piece is buckled On the beam of the cage, the arc The end of the shape cooperates with the roller and pushes the roller.
  • the two roller overrunning clutches are structurally constrained. The low load carrying capacity and the unsynchronization during operation are the most deadly problems.
  • Double cage overrunning clutch comprising an inner ring with an outer raceway and an outer ring with an inner raceway, a plurality of shaped blocks between the inner and outer raceways; and an inner cage and an outer cage
  • the annular double retainer is formed, and the same number of retaining holes are evenly distributed on the inner and outer retaining frames, and the shaped retaining blocks are relatively held by the retaining holes of the circular double retainer in the annular inner and outer rolling a plurality of perforated spring strips are disposed between the inner and outer cages of the double retainer, and a plurality of shaped clips are inserted into the through holes of the spring strip; and the utility model is characterized in that: the outer retainer is provided with a plurality of Fixed reeds; a plurality of friction reeds on the inner cage.
  • the overrunning clutch ensures the synchronization during operation, since the radius of curvature of the wedge is small and the gap between the cage and the wedge is large, the wedge is liable to be tilted during loading, so that the wedge and the inner and outer raceways are There is a point contact between them, so the torque tolerated is small.
  • the present invention provides a bearing type overrunning clutch structure which can improve the load carrying capacity and prolong the service life.
  • a bearing type overrunning clutch structure includes an outer ring, an inner star wheel and a plurality of rollers disposed between the outer ring and the inner star wheel, wherein:
  • the inner star wheel has a plurality of concave curved grooves in the circumferential direction, and each concave curved groove corresponds to one roller, and the outer race of the roller is the inner cylindrical inner surface of the outer ring which is in contact with the roller, and the inner roller
  • the track is a concave curved groove on the outer cylindrical surface of the inner star wheel;
  • the inner star wheel rotates in the same direction as the outer ring, when the speed of the inner star wheel is less than or equal to the outer ring At speed nl, the roller is wedged between the inner star and the outer ring, and the clutch is in a combined state; when the speed n2 of the inner star is greater than the speed nl of the outer ring, the clutch is disengaged.
  • the outer ring is a gear outer ring
  • the outer ring is provided with an annular groove in a circumferential direction
  • the inner star wheel and the plurality of matched rollers are disposed in the annular groove to form a clutch structure, and the rollers are assembled
  • the outer raceway of the roller is the outer peripheral surface of the annular groove of the outer ring
  • the inner raceway is a concave curved groove on the inner star wheel.
  • the concave curved groove is evenly distributed on the outer cylindrical surface of the inner star wheel, and the depth L of the concave curved groove is: ⁇ L ⁇ , where d is the roller diameter, (if the depth is too shallow, the clutch is difficult Disengaged, the depth is too deep, the concave curved groove is difficult to manufacture).
  • the bus bar of the concave curved surface constituting the concave curved groove is parallel to the inner star axis.
  • the concave curved surface in the concave curved surface groove is a curved surface formed by a logarithmic spiral or an arc. Further, the pole of the logarithmic spiral forming the concave curved surface or the center of the arc and the eccentricity of the center of the roller e>0.
  • roller is kept tangent to the outer ring or the outer raceway surface of the gear outer ring.
  • the roller when the speed n2 of the inner star wheel is less than or equal to the speed nl of the outer ring, the roller is wedged between the inner star wheel and the outer ring, and the clutch is in a combined state; when the inner star wheel speed n2 is larger than the outer ring At speed nl, the clutch is disengaged.
  • the invention is characterized in that: the bearing type overrunning clutch increases the number of rollers in the same space, so that the gap s between adjacent two rollers is reduced to 0 ⁇ 0. 2mm, and the original inner star plane is Type changed to concave Curved type.
  • the bearing type overrunning clutch of the present invention removes the spring pin mechanism or the three-foot spring and the isolating ring in the existing overrunning clutch, thereby avoiding the spring due to the small number of effective working rollers. And the failure of the top pin, the excessive wear or deformation of the roller and the large gap between the spacer ring and the roller, the roller is inclined when the load is loaded, and the roller is kept in contact with the star wheel and the outer ring to cause the bearing capacity. The problem of falling.
  • the invention increases the number of rollers in the same space to reduce the roller gap, and also changes the original inner star wheel plane type to a concave curved surface type, which increases the comprehensive curvature of the contact point between the roller and the inner star wheel outer surface, thereby greatly Increased contact strength and increased torque capacity.
  • the invention has reasonable structural design, simple manufacturing process, strong working reliability, good synchronism, can withstand large torque and impact force, and can be loaded at high speed and heavy load. In case of long hours of work.
  • the bearing type overrunning clutch structure of the invention is mainly applied to a loader, and can also be applied to an airplane, a tank, a military truck, a heavy truck, an off-road vehicle, a ship, a forklift, a car, a motorcycle, a lathe, a printing machine, a textile machine, a nut.
  • Figure 1 is a partial cross-sectional view of the present invention
  • a bearing type overrunning clutch is also called a bearing type loader two-shaft assembly overrunning clutch, including outer ring 1, inner star wheel 2, and roller 3, in the outer ring.
  • a bearing type overrunning clutch is also called a bearing type loader two-shaft assembly overrunning clutch, including outer ring 1, inner star wheel 2, and roller 3, in the outer ring.
  • rollers 3 between the inner star wheel 2 and the inner star wheel 2
  • 24 concave curved grooves are arranged on the outer cylindrical surface of the inner star wheel 2, and a concave curved groove corresponds to one roller 3.
  • the concave curved surface in the concave curved groove is composed of a logarithmic spiral, because the angle between the tangent at any point on the logarithmic spiral and the polar radius P of the point (ie, the spiral angle) is The constant m, the roller from the momentary engagement to the full transmission of the torque, the angle of engagement with the inner race" remains unchanged, so the forces acting on the individual rollers are equal.
  • the inner star wheel 2 when the inner star 2 is counterclockwise When the rotation speed and the speed n2 are less than or equal to the speed n1 of the outer ring 1, the roller is engaged at this time, the inner star wheel 2 drives the outer ring 1 to rotate by the roller 3, and the clutch is in the combined state P1, as indicated by the solid line in FIG. 2;
  • the clutch is in the disengaged state P2, as indicated by the broken line in FIG.
  • the outer ring 1 is a gear outer ring, which is composed of a ring body 11 and a plurality of teeth 12 on the outer peripheral side thereof, and the ring body is provided with an annular groove in the circumferential direction.
  • the slot penetrates through an end surface of the outer ring of the gear, and the inner star wheel 2 and the plurality of matched rollers 3 are disposed in the annular groove to form a clutch structure, and the rollers are assembled on the outer cylindrical surface of the inner star wheel.
  • the outer race of the roller is the outer circumferential surface of the annular groove with the outer ring, and the inner race is the concave curved groove on the inner star wheel.
  • the above structure is assembled on the rotating shaft 4, one end of the rotating shaft ( The left end) radially extends to form a rotating shaft end cover 40, which is fastened to the inner star wheel 2 by bolts 5 and nuts, and the gear outer ring and the inner star wheel are relatively rotatable, His structure is the same as the technical solution of the present invention.
  • the inner cylindrical surface of the outer ring has a diameter of 210 mm, the roller diameter is 24.23 mm, the roller length is 32 mm, and the outer diameter of the inner star wheel and the roller contact point is 162 mm, the roller and the inner and outer raceway surfaces.
  • the engagement angle is 3.75°, the gap between the roller and the roller is 0.02 mm, the radius of curvature of the contact point between the roller and the star wheel surface is 15 mm, and the radius of curvature of the contact point between the roller and the outer raceway is 105.
  • the number of wedges in the wedge type overrunning clutch is 44, the width of the wedge is 20.5mm, and the radius of curvature of the contact point between the wedge and the inner and outer raceways is 7.85, the outer surface diameter of the inner ring is 184.18, the meshing angle ⁇ of the wedge and the outer surface of the inner race is 3.4°; the meshing angle ⁇ of the wedge and the inner surface of the outer race is 2.58°; the wedge and the outer race are known by Hertz theory.
  • Z the number of rollers or wedges
  • R raceway radius
  • the gap between the roller and the roller in the two-axle assembly of the bearing loader is small, only 0. 02mm, when the clutch is in the combined state, one roller is engaged and loaded, between the roller and the roller Through linkage, all the rollers are synchronously loaded, thus ensuring full synchronism during operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

Une roue libre de type à appui comprend une bague externe (1) et une roue en étoile interne (2). Une pluralité de rouleaux (3) est disposée entre la bague externe (1) et la roue en étoile interne (2). Une pluralité de rainures concaves est disposée sur la surface cylindrique externe de la roue en étoile interne (2), chacune correspondant à un rouleau (3), respectivement. Le dégagement entre les rouleaux adjacents (3) est de 0 à 0,2 mm. La caractéristique principale de l'invention est de garantir un dégagement entre les rouleaux adjacents (3) compris dans la plage de 0 à 2 mm en augmentant le nombre de rouleaux dans un même espace; et d'augmenter en même temps la résistance de contact en disposant la pluralité de rainures concaves sur la surface cylindrique externe de la roue en étoile interne (2). L'invention présente les avantages suivants : une conception de structure raisonnable, un procédé de fabrication simple, une précision de fabrication élevée et une grande fiabilité de fonctionnement, etc. La roue libre selon l'invention peut supporter un couple et une force d'impact relativement importants, et peut fonctionnement pendant longtemps dans des conditions de vitesse et de charge élevées.
PCT/CN2010/001970 2009-12-11 2010-12-06 Structure de roue libre de type à appui WO2011069330A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/381,667 US20120132496A1 (en) 2009-12-11 2010-12-06 Bearing type overrunning clutch structure

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200920265245 2009-12-11
CN200920265245.1 2009-12-11
CN2010102933113A CN101956772B (zh) 2009-12-11 2010-09-16 轴承式超越离合器结构
CN201010293311.3 2010-09-16

Publications (1)

Publication Number Publication Date
WO2011069330A1 true WO2011069330A1 (fr) 2011-06-16

Family

ID=43484305

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/001970 WO2011069330A1 (fr) 2009-12-11 2010-12-06 Structure de roue libre de type à appui

Country Status (3)

Country Link
US (1) US20120132496A1 (fr)
CN (2) CN101956772B (fr)
WO (1) WO2011069330A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107299943A (zh) * 2017-05-19 2017-10-27 重庆凯瑞电动汽车系统有限公司 带拨爪的双向超越离合器

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101956772B (zh) * 2009-12-11 2013-11-27 陈菊花 轴承式超越离合器结构
CN102734426A (zh) * 2012-05-08 2012-10-17 内蒙古科技大学 具有等压力角传动特性的盘形凸轮
CN105221603B (zh) * 2015-11-18 2018-08-31 传孚科技（厦门）有限公司 装载机轴承式超越离合器二轴总成
CN106545597A (zh) * 2016-12-21 2017-03-29 宁波市镇海捷登应用技术研究所 一种能延长使用寿命的超越离合器
CN108253039B (zh) * 2018-02-06 2024-05-03 武汉易知鸟科技有限公司 一种行星齿轮超越离合器
CN112797090A (zh) * 2019-11-13 2021-05-14 舍弗勒技术股份两合公司 电动助力车的单向离合器和电动助力车
CN112196968B (zh) * 2020-10-27 2022-06-10 传孚科技（厦门）有限公司 一种用于车辆的差速系统
WO2022087838A1 (fr) * 2020-10-27 2022-05-05 传孚科技（厦门）有限公司 Ensemble embrayage
CN115195434A (zh) * 2022-08-30 2022-10-18 奇瑞汽车股份有限公司 电动辅助驱动器、电动辅助驱动系统和新能源电动汽车

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Publication number Priority date Publication date Assignee Title
FR2566493A1 (fr) * 1984-06-20 1985-12-27 Paris & Du Rhone Perfectionnements aux roues libres
CN2572124Y (zh) * 2002-09-25 2003-09-10 包头市工程机械齿轮厂 装载机滚柱式超越离合器
US20040245061A1 (en) * 2003-01-22 2004-12-09 Nsk-Warner K.K. Oneway clutch apparatus
CN2660213Y (zh) * 2003-12-11 2004-12-01 兰永福 摩托车的超越离合器
CN101055005A (zh) * 2007-03-16 2007-10-17 福建省三明齿轮箱有限责任公司 超大滚柱工程机械超越离合器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107299943A (zh) * 2017-05-19 2017-10-27 重庆凯瑞电动汽车系统有限公司 带拨爪的双向超越离合器

Also Published As

Publication number Publication date
CN101956772B (zh) 2013-11-27
US20120132496A1 (en) 2012-05-31
CN101956772A (zh) 2011-01-26
CN201925368U (zh) 2011-08-10

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