WO2008047457A1 - Embrayage à roue libre de type à galets - Google Patents

Embrayage à roue libre de type à galets Download PDF

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Publication number
WO2008047457A1
WO2008047457A1 PCT/JP2006/320983 JP2006320983W WO2008047457A1 WO 2008047457 A1 WO2008047457 A1 WO 2008047457A1 JP 2006320983 W JP2006320983 W JP 2006320983W WO 2008047457 A1 WO2008047457 A1 WO 2008047457A1
Authority
WO
WIPO (PCT)
Prior art keywords
outer ring
way clutch
roller
roller type
spring
Prior art date
Application number
PCT/JP2006/320983
Other languages
English (en)
Japanese (ja)
Inventor
Hirobumi Shirataki
Tomoharu Ando
Original Assignee
Nsk-Warner K.K.
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 Nsk-Warner K.K. filed Critical Nsk-Warner K.K.
Priority to PCT/JP2006/320983 priority Critical patent/WO2008047457A1/fr
Publication of WO2008047457A1 publication Critical patent/WO2008047457A1/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
    • F16D41/067—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 and the members being distributed by a separate cage encircling the axis of rotation

Definitions

  • the present invention relates to a roller type one-way clutch used as a component for torque transmission, backstop, etc., in a drive device such as an automobile or industrial machine.
  • a roller type one-way clutch is arranged between an outer ring, an inner ring arranged concentrically with the outer ring, an outer ring of the inner ring and an inner cam surface of the outer ring, and a plurality of rollers for transmitting torque, It consists of a spring that contacts the idle side.
  • the one-way clutch is configured such that the inner ring rotates in only one direction with respect to the outer ring by a cam mechanism including a roller and a cam surface.
  • the inner ring is idled in one direction with respect to the outer ring, and rotational torque is applied to the outer ring via the cam mechanism only in the opposite direction.
  • a roller type one-way clutch requires a roller that is a torque transmission member and a spring that urges it to be prevented from falling off from the pocket in the axial and radial directions in order to obtain a reliable fit. is there.
  • the number of rollers is small (for example, 3 or 6), so there is a risk that the design torque capacity cannot be secured unless the respective rollers are tightly fitted.
  • an object of the present invention is to provide a one-way clutch in which rollers and springs can be prevented from falling off in the axial direction and the radial direction without using a side plate, and the rollers can be securely engaged.
  • a roller type one-way clutch comprises an annular outer ring having a pocket having an inner peripheral cam surface
  • An inner ring that is spaced radially inward from the outer ring, is concentrically disposed so as to be relatively rotatable, and has an annular outer raceway surface;
  • a plurality of rollers disposed in the pocket, engaged with the cam surface, and transmitting torque between the outer ring and the inner ring;
  • a retainer for holding the plurality of rollers comprising: a cylindrical portion; and first and second flange portions extending from the cylindrical portion in an outer diameter direction;
  • the retainer is prevented from moving in the axial direction by sandwiching the outer ring between the first and second flange portions.
  • the cage prevents the rollers and springs from falling off in the axial and radial directions, eliminating the need for side plates.
  • the cage is provided with the function of holding the roller and the spring and the function of the side plate.
  • FIG. 1 is a front view showing a roller type one-way clutch according to an embodiment of the present invention.
  • FIG. 2 is a front view seen from the back side of FIG.
  • FIG. 3 is a cross-sectional view taken along line AA in FIG.
  • FIG. 4 is a front view showing a modified example of the cage.
  • FIG. 5 is a partial front view showing details of the second flange portion of the cage.
  • FIG. 6 is a partial cross-sectional view taken along line Y—Y in FIG.
  • FIG. 7A and 7B are diagrams showing details of the relationship between the outer ring and the cage, FIG. 7A is a partial front view, and FIG. 7B is a sectional view thereof.
  • Fig. 8 is a cross-sectional view showing the one-way clutch attached to the engine crank.
  • FIG. 9 is a cross-sectional view showing another embodiment in which the one-way clutch is attached to the engine crank.
  • FIG. 10 is an enlarged view of the portion indicated by the arrow C in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a front view showing a roller type one-way clutch of an embodiment of the present invention
  • FIG. 2 is a front view seen from the back side of FIG.
  • FIG. 3 is a cross-sectional view taken along line AA in FIG.
  • the roller type one-way clutch 30 includes a ring-shaped outer ring 1 having a pocket 4 formed as a recess having a cam surface 12 on the inner periphery, and a radial direction with respect to the outer ring 1.
  • An inner ring 2 having an annular outer raceway surface 1 1 spaced apart on the inner diameter side and arranged concentrically so as to be relatively rotatable, and a pocket 4 between the outer raceway surface 1 1 and the cam surface 1 2.
  • Multiple rollers 3 that transmit torque and multiple rollers 3 It consists of a cage 6 to hold.
  • the pockets 4 provided in the outer ring 1 are provided at three locations in the circumferential direction. Further, stepped bolt holes 8 that are used to fix the outer ring 1 to an unillustrated input / output member or the like and penetrate in the axial direction are provided at three locations equally in the circumferential direction. As shown in FIG. 1, the pockets 4 and the bolt holes 8 are alternately arranged at equal intervals. Needless to say, the number of pockets 4 can be set to a plurality of pockets such as 3 to 6, for example, depending on the magnitude of torque.
  • the cage 6 that holds the roller 3 includes a cylindrical portion 14, a first flange portion 9 that extends in the outer diameter direction from the axial portion of the cylindrical portion 14, and a second flange portion respectively.
  • the flange portion 10 is provided.
  • the outer ring 1 is sandwiched between the first flange portion 9 and the second flange portion 10. As a result, the cage 6 is restricted from moving in the axial direction.
  • the first flange portion 9 is shown partially broken so that the pocket 4 can be seen.
  • the first flange portion 9 is provided with a long window 15 penetrating in the axial direction corresponding to the position of the pocket 4.
  • This window 15 functions as a discharge hole for discharging foreign matter in the pocket 4 generated due to the engagement between the cam surface 12 and the roller 3 to the outside.
  • the first flange portion 9 further includes a through hole 16 provided corresponding to a stepped bolt hole 8 for fixing the outer ring 1 to a generator or the like described later.
  • the cage 6 is attached to the outer ring 1 as follows.
  • a plate-shaped cage 6 made by pressing from a single steel plate or the like is set on one side in the axial direction of the outer ring 1 and folded into a U-shape on the inner diameter side of the outer ring 1, A first flange portion 9 and a cylindrical portion 14 are formed. Then place roller 3 and spring 5 in pocket 4. Next, the cage 6 is folded back on the other surface of the outer ring 1 and engaged with the outer ring 1 to form a second flange portion 10.
  • the outer ring 1 is covered with the L-shaped cage 6 and the roller 3 and the spring 5 are With the crimped, the cage 6 is crimped into a U-shape (U-shape) with a press (not shown). In this way, the cage 6 can be prevented from coming off in the axial direction by bending the cage 6 into a U shape. Therefore, it is not necessary to provide a side plate that was necessary in the past.
  • FIG. 2 is a front view of the roller type one-way clutch 30 shown in FIG. 1 as viewed from the opposite side.
  • the second flange portion 10 of the cage 6 includes two extensions 1 3 and 17.
  • the extension portion 13 holds the spring 5 so as not to drop off in the axial direction and the radial direction, and the extension portion 17 holds the roller 3 so as not to drop off in the axial direction.
  • FIG. 4 is a front view showing a modified example of the cage 6.
  • the first flange portion 18 force of the cage 6 has a smaller diameter than the first flange portion 9 shown in FIGS.
  • the first flange portion 18 is formed with a small diameter so as not to cover the stepped bolt hole 8 and to expose the cam surface 12.
  • FIG. 5 is a partial front view showing details of the second flange portion of the cage without an inner ring attached.
  • the cylindrical part 14 of the cage 6 has a convex part 19 projecting in the direction of the roller 3 in the circumferential direction. . Accordingly, the roller 3 supported by the convex portion 19 can be prevented from falling to the inner ring 2 side.
  • the cylindrical portion 14 further includes a convex portion 20 that supports the spring 5.
  • FIG. 6 is a partial cross-sectional view taken along line Y—Y in FIG. In Fig. 6, the roller 3 is not shown.
  • the second flange portion 10 of the cage 6 is made up of extensions 13 and 17 which are intermittently bent in the circumferential direction and partially bent.
  • the extension 1 3 holds the spring 5, and the extension 1 7 holds the roller 5.
  • one end of the spring 5 assembled to the outer ring 1 from the direction of arrow D is L-shaped. And is engaged with a side surface 4 a of the pocket 4 and a step portion 25 provided at a first axial portion of the outer ring 1.
  • the tab 5 a of the spring 5 engaged with the step portion 25 is sandwiched between the step portion 25 and the extension portion 13 so that the spring 5 can be positioned in the axial direction. Therefore, the operation of spring 5 is stabilized. In addition, since the spring 5 is in a fixed state, it does not fluctuate in the pocket 4 and the wear of the spring 5 can be prevented.
  • the spring 5 used in the present invention is an accordion spring, but other shapes such as a coil spring can be used.
  • FIG. 7A and 7B are diagrams showing details of the relationship between the outer ring and the cage, FIG. 7A is a partial front view, and FIG. 7B is a sectional view thereof.
  • the second flange portion 10 of the cage 6 has two extensions 13 and 17 which are bent in a U shape in the axial section. . Extensions 1 3 and 1 7 are bent by caulking.
  • the extension part 13 holds the spring 5 in the axial direction and the radial direction
  • the extension part 17 holds the roller 3 in the axial direction.
  • Steps 23 and 25 are formed on one end surface in the axial direction of the outer ring 1 shown in FIG. 7A and FIG. 7B as recesses recessed from the end surface at the end in the circumferential direction of the pocket 4. It has been.
  • An extension portion 17 that holds the roller 3 is fitted to the step portion 21, and an extension portion 13 that holds the spring 5 is fitted to the step portion 25.
  • the step portion 2 3 is surrounded by the outer diameter side flange portion 21 and the circumferential edge portion 22, and the step portion 25 is surrounded by the outer diameter side edge portion 24 and the circumferential edge portion 26. It is. Therefore, the retainer 6 cannot rotate in either of the circumferential directions by the extension portion 17 being in contact with the edge portion 22 and the extension portion 13 being in contact with the edge portion 26. Therefore, it is possible to prevent the cage 6 from being rotated while the one-way clutch 30 is in operation, and it is possible to prevent the cage 6 from being worn.
  • the extension 17 of the cage 6 is fitted to the step 2 3 of the outer ring 1, but the thickness of the cage 6 is larger than the axial depth of the step 23. Ie extension 1 Since the thickness of 7 is small, the extension 17 does not protrude from the axial end surface 27 of the outer ring 1. Accordingly, the extension portion 17 can be prevented from interfering with the counterpart member. Needless to say, the extension 1 3 has the same structure.
  • the steps 2 3 and 25 may be formed by grinding the outer ring 1. However, if the outer ring 1 is made by sintering and is formed at the same time, the processing cost of the steps can be reduced. Monkey.
  • Fig. 8 is a cross-sectional view showing the one-way clutch attached to the engine crank.
  • the one-way clutch 30 is attached by screwing the inner ring 2 that is a star gear to the engine crank 32.
  • the axial end face 2 7 of the outer ring 1 is connected to the disk part 3 of the generator 3 1. 5 is in contact. That is, the extension portions 1 3 and 17 are also in contact with the disc portion 35.
  • the generator 31 is fixed to the outer ring 1 by screwing a fixing screw 36 into a stepped bolt hole 8 of the outer ring 1 and a screw hole 33 provided in the disc portion 35.
  • FIG. 9 is a cross-sectional view showing another embodiment in which the one-way clutch is attached to the engine crank.
  • FIG. 10 is an enlarged view of the portion indicated by the arrow C in FIG. A washer 3 4 is inserted between 5 and 5. The axial thickness of the washer 3 4 is almost the same as the plate thickness (axial thickness) of the extensions 1 3 and 17, thereby making up for the gap with the generator 3 1.
  • the present invention is used as a component for torque transmission, backstop, etc. in a drive device such as an automobile or an industrial machine, but is particularly effective when used for a two-wheeled passenger car.

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

Abstract

Un embrayage à roue libre de type à galets comprend un anneau extérieur possédant des poches dont chacune est dotée d'une surface de came à la périphérie intérieure de la poche; un anneau intérieur disposé à une certaine distance de l'anneau extérieur en direction du diamètre intérieur dans le sens radial, de façon concentrique avec l'anneau extérieur pour pouvoir effectuer des rotations l'un par rapport à l'autre, et qui possède une surface de course annulaire périphérique extérieure; des galets disposés dans le poches qui entrent en prise avec les surface de came et qui transmettent le couple entre les anneaux extérieur et intérieur; une partie cylindrique circulaire creuse; et une cage possédant une première et une deuxième partie de bride qui s'étendent depuis la partie cylindrique circulaire creuse en direction du côté de diamètre extérieur et retiennent les galets. L'anneau extérieur est retenu par les première et deuxième parties de bride afin d'empêcher tout mouvement axial de la cage.
PCT/JP2006/320983 2006-10-16 2006-10-16 Embrayage à roue libre de type à galets WO2008047457A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/320983 WO2008047457A1 (fr) 2006-10-16 2006-10-16 Embrayage à roue libre de type à galets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/320983 WO2008047457A1 (fr) 2006-10-16 2006-10-16 Embrayage à roue libre de type à galets

Publications (1)

Publication Number Publication Date
WO2008047457A1 true WO2008047457A1 (fr) 2008-04-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/320983 WO2008047457A1 (fr) 2006-10-16 2006-10-16 Embrayage à roue libre de type à galets

Country Status (1)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009293724A (ja) * 2008-06-06 2009-12-17 Nsk Warner Kk 二輪車スタータ用のローラ型ワンウェイクラッチ
JP2010096259A (ja) * 2008-10-16 2010-04-30 Nsk Warner Kk ローラ型ワンウェイクラッチ
JP2013011359A (ja) * 2012-10-17 2013-01-17 Nsk Warner Kk 二輪車スタータ用のローラ型ワンウェイクラッチ
US8397888B2 (en) 2008-10-30 2013-03-19 Nsk-Warner K.K. One-way clutch of roller type
US8448767B2 (en) 2008-10-03 2013-05-28 Nsk-Warner K.K. One-way clutch of roller type
US8459423B2 (en) 2008-10-28 2013-06-11 Nsk-Warner K.K. One-way clutch of roller type
US8485332B2 (en) 2008-02-27 2013-07-16 Nsk-Warner K.K. Roller-type one-way clutch
CN104411991A (zh) * 2012-11-26 2015-03-11 Nsk沃纳株式会社 滚子型单向离合器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56157435U (fr) * 1980-04-23 1981-11-24
JPS5733232A (en) * 1980-06-25 1982-02-23 Schaeffler Ohg Industriewerk Monobloc metallic thin plate made holder for roller type one-way clutch
JP2002295520A (ja) * 2001-03-29 2002-10-09 Ntn Corp 一方向クラッチ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56157435U (fr) * 1980-04-23 1981-11-24
JPS5733232A (en) * 1980-06-25 1982-02-23 Schaeffler Ohg Industriewerk Monobloc metallic thin plate made holder for roller type one-way clutch
JP2002295520A (ja) * 2001-03-29 2002-10-09 Ntn Corp 一方向クラッチ

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8485332B2 (en) 2008-02-27 2013-07-16 Nsk-Warner K.K. Roller-type one-way clutch
JP2009293724A (ja) * 2008-06-06 2009-12-17 Nsk Warner Kk 二輪車スタータ用のローラ型ワンウェイクラッチ
US8434605B2 (en) 2008-06-06 2013-05-07 Nsk-Warner K.K. One-way clutch of roller type for starter of motor bike
US8448767B2 (en) 2008-10-03 2013-05-28 Nsk-Warner K.K. One-way clutch of roller type
JP2010096259A (ja) * 2008-10-16 2010-04-30 Nsk Warner Kk ローラ型ワンウェイクラッチ
US8393453B2 (en) 2008-10-16 2013-03-12 Nsk-Warner K.K. One-way clutch of roller type
US8459423B2 (en) 2008-10-28 2013-06-11 Nsk-Warner K.K. One-way clutch of roller type
US8397888B2 (en) 2008-10-30 2013-03-19 Nsk-Warner K.K. One-way clutch of roller type
JP2013011359A (ja) * 2012-10-17 2013-01-17 Nsk Warner Kk 二輪車スタータ用のローラ型ワンウェイクラッチ
CN104411991A (zh) * 2012-11-26 2015-03-11 Nsk沃纳株式会社 滚子型单向离合器

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