WO2018070154A1 - Embrayage à roue libre - Google Patents

Embrayage à roue libre Download PDF

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Publication number
WO2018070154A1
WO2018070154A1 PCT/JP2017/032492 JP2017032492W WO2018070154A1 WO 2018070154 A1 WO2018070154 A1 WO 2018070154A1 JP 2017032492 W JP2017032492 W JP 2017032492W WO 2018070154 A1 WO2018070154 A1 WO 2018070154A1
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WO
WIPO (PCT)
Prior art keywords
coil spring
spring
way clutch
roller
cap
Prior art date
Application number
PCT/JP2017/032492
Other languages
English (en)
Japanese (ja)
Inventor
義夫 今西
Original Assignee
株式会社エクセディ
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 株式会社エクセディ filed Critical 株式会社エクセディ
Publication of WO2018070154A1 publication Critical patent/WO2018070154A1/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
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • 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 present invention relates to a one-way clutch.
  • the one-way clutch is generally provided on the radially outer side of the shaft member.
  • This one-way clutch mainly includes an outer ring, a plurality of rollers, and a plurality of coil springs.
  • the outer ring is disposed on the radially outer side of the shaft member and has a plurality of pocket portions.
  • the roller and the coil spring are accommodated in the pocket portion, and the roller is biased in one direction of rotation by the spring.
  • the one-way clutch includes a cover and a plate arranged so as to cover both sides of the pocket portion in the axial direction.
  • a through hole may be formed so as to face the pocket portion from the outer periphery of the outer ring (see, for example, FIG. 4 of Patent Document 1).
  • a cylindrical spring cap is put on the front end of the coil spring, and the spring cap and the coil spring are inserted into the through hole so that the front end contacts the roller. In this case, the coil spring is prevented from falling.
  • Patent Document 2 a one-way clutch in which a roller is pushed using an accordion spring without using a coil spring without forming a through hole in the outer ring.
  • An object of the present invention is to enable a one-way clutch to expand and contract in a state in which a posture of a coil spring is stabilized without forming a through hole in an outer ring.
  • the one-way clutch according to the present invention is provided on the shaft member.
  • the one-way clutch includes an outer ring, a roller, a coil spring, a spring cap, and a seat member.
  • wheel has a pocket part provided so that it might become depressed toward the radial direction outer side, and is arrange
  • the roller is stored in the pocket portion.
  • the coil spring is housed in the pocket portion and biases the roller in the circumferential direction.
  • the spring cap is disposed between the coil spring and the roller, and supports at least a part of the outer periphery of the coil spring.
  • the seat member is disposed between the coil spring and the wall surface of the pocket portion, and supports at least a part of the inner periphery of the coil spring.
  • the outer periphery is supported by a spring cap on one side of the coil spring, and the inner periphery is supported by a sheet member on the other side. For this reason, the fall at the time of expansion / contraction of a coil spring can be suppressed, without inserting a coil spring in a through-hole.
  • a guide member for guiding the circumferential movement of the spring cap is further provided.
  • it further includes a cover and a plate arranged so as to sandwich the outer ring and the roller in the axial direction.
  • the guide member is provided on at least one of the cover and the plate so as to support the inner peripheral side of the spring cap.
  • a guide member is provided on the cover and / or the plate, and the inner peripheral side of the spring cap is supported by the guide member. For this reason, the coil spring is reliably prevented from falling, and the spring cap moves smoothly.
  • the guide member is formed by bending a part of the cover and / or the plate.
  • the guide member can be realized with a simple configuration.
  • the spring cap has a spring contact portion and a side wall portion.
  • the spring contact portion contacts the roller-side end surface of the coil spring.
  • the side wall portion extends from the spring abutting portion to the coil spring side and demarcates an accommodation space for accommodating an end portion of the coil spring on the roller side.
  • the side wall portion has a first slit and a second slit.
  • the first slit communicates the housing space and the outside on the radially outer side and extends along the length direction of the coil spring.
  • the second slit communicates the housing space and the outside on the radially inner side and extends along the length direction of the coil spring.
  • the diameter of the coil spring In order to insert the end of the coil spring into the spring cap, the diameter of the coil spring needs to be sized to fit in the spring cap. For this reason, the outer diameter of the coil spring is relatively small.
  • the side wall of the spring cap has a first slit and a second slit.
  • positioned in the accommodation space of a side wall part can be enlarged by the part of each slit.
  • the diameter of the coil spring can be increased as compared with the conventional one, the coil spring can be expanded and contracted in a stable posture.
  • the side wall of the spring cap is set longer than the contact length of the coil spring.
  • the spring cap has a tapered surface whose diameter increases toward the outside at the opening.
  • the sheet member has a support part and a projection part.
  • the support portion contacts the wall surface of the pocket portion and supports the end surface of the coil spring.
  • the protrusion extends from the contact portion into the coil spring and supports the inner peripheral portion of the coil spring.
  • the coil spring in the one-way clutch, can be expanded and contracted in a stable state without forming a through hole in the outer ring.
  • FIG. 1 is a front view of a one-way clutch according to an embodiment of the present invention.
  • the pocket part enlarged view of FIG. The figure which shows the state which the roller moved from the position of FIG.
  • FIG. 5 is a sectional view taken along line VV in FIG. 3.
  • FIG. 6 is a sectional view taken along line VI-VI in FIG. 3.
  • the axial direction refers to the direction in which the rotating shaft of the one-way clutch 1 extends.
  • the radial direction refers to the radial direction of a circle centered on the rotation axis of the one-way clutch 1.
  • the circumferential direction refers to the circumferential direction of a circle around the rotation axis of the one-way clutch 1.
  • the one-way clutch 1 is used for a driving system or a starting system of a motorcycle or the like, and is mounted on the outer side in the radial direction of the shaft member 2.
  • the one-way clutch 1 includes an outer ring 3, a plurality of rollers 4, a plurality of coil springs 5, a plurality of spring caps 6, and a plurality of spring seats 7.
  • the one-way clutch 1 includes a plate 8 and a cover 9.
  • the outer ring 3 is an annular member to which torque is transmitted from the shaft member 2.
  • the outer ring 3 is disposed on the radially outer side of the shaft member 2.
  • the outer ring 3 has a plurality of pocket portions 10 in the inner peripheral portion.
  • the outer ring 3 has a plurality of holes 12.
  • the holes 12 are arranged at equal intervals in the circumferential direction.
  • the hole 12 is for allowing a bolt to pass therethrough in order to attach the one-way clutch 1 to another member of the drive system.
  • the pocket portion 10 is formed between two adjacent holes 12.
  • each pocket portion 10 has the same shape.
  • the pocket portion 10 is provided at the inner peripheral end portion of the outer ring 3 so as to be recessed outward in the radial direction.
  • each pocket portion 10 includes a first side wall portion 15, a second side wall portion 16, a first peripheral wall portion 17, and a second peripheral wall portion 18.
  • the first side wall portion 15 and the second side wall portion 16 are arranged so as to face each other in the circumferential direction.
  • the first peripheral wall portion 17 and the second peripheral wall portion 18 connect the first side wall portion 15 and the second side wall portion 16 at the bottom of the pocket portion 10.
  • the first side wall portion 15 and the first peripheral wall portion 17 form a space in which the roller 4 is accommodated.
  • This space has a narrower radial gap as it approaches the first side wall 15 from the side away from the first side wall 15.
  • the second peripheral wall portion 18 has a smaller inner diameter than the first peripheral wall portion 17.
  • a space in which the coil spring 5, the spring cap 6, and the spring seat 7 are accommodated is formed by the second peripheral wall portion 18 and the second side wall portion 16.
  • the outer peripheral portion of the outer ring 3 has a larger diameter on the cover 9 side than the plate 8 side, and a step portion is formed.
  • roller 4 As shown in FIG. 3, the roller 4 is a member for transmitting the power from the shaft member 2 to the outer ring 3.
  • the roller 4 is formed in a columnar shape extending along the rotation axis of the shaft member 2 and is accommodated in the pocket portion 10.
  • the coil spring 5 is disposed inside the pocket portion 10 and biases the roller 4 in the circumferential direction. Specifically, the coil spring 5 urges the roller 4 in the circumferential direction via the spring cap 6. The coil spring 5 is set by being compressed between the roller 4 and the spring seat 7. For this reason, the roller 4 is always urged toward the first side wall 15 by the coil spring 5.
  • the coil spring 5 has a circular cross section. One end of the coil spring 5 contacts the spring cap 6 and the other end contacts the spring seat 7.
  • the spring cap 6 is disposed between the coil spring 5 and the roller 4 and supports a part of the outer periphery of the coil spring 5.
  • the spring cap 6 is made of resin and includes a spring contact portion 61 and a side wall portion 62 as shown in FIGS.
  • the spring contact portion 61 has a rectangular shape, the outer surface contacts the roller 4, and the end surface of the coil spring 5 contacts the inner surface.
  • the side wall part 62 is cylindrical and extends from the spring contact part 61 to the coil spring 5 side.
  • the side wall 62 is set to be longer than the contact length of the coil spring 5, and defines a storage space 63 for storing the end of the coil spring 5 on the roller side.
  • the accommodation space 63 has a circular cross section and is larger than the outer diameter of the coil spring 5, but has an inner diameter that is substantially the same as the outer diameter of the coil spring 5. That is, the side wall 62 supports the outer periphery of the coil spring 5.
  • the side wall part 62 has a first slit 62a and a second slit 62b formed to face each other.
  • the first slit 62 a communicates the housing space 63 and the outside on the radially outer side, and extends along the length direction of the coil spring 5.
  • the second slit 62 b communicates the accommodation space 63 and the outside on the radially inner side and extends along the length direction of the coil spring 5.
  • the outer surface of the coil spring 5 enters these slits 62a and 62b.
  • a tapered surface 62c whose diameter increases toward the spring seat 7 is formed in the opening of the side wall 62. More specifically, the tapered surface 62 c is formed on a part of the inner peripheral surface of the side wall portion 62. The tapered surface 62c is formed so that the outer diameter gradually increases from the substantially central portion in the longitudinal direction of the side wall portion 62 toward the spring seat 7 side.
  • the spring seat 7 is disposed between the coil spring 5 and the second side wall portion 16. As shown in FIG. 5 and the like, the spring seat 7 has a support portion 71 and a protrusion 72.
  • the support portion 71 is formed in a substantially rectangular shape, and includes a first support surface 71a that contacts the second side wall portion 16 and a second support surface 71b that contacts the end surface of the coil spring 5.
  • the first support surface 71 a is formed along the shape of the second side wall portion 16.
  • the second support surface 71b is planar.
  • the protrusion 72 is formed at the center of the support 71, extends toward the roller 4, and is inserted into the coil spring 5.
  • the outer diameter of the protrusion 72 is smaller than the inner diameter of the coil spring 5, but is substantially the same as the inner diameter of the coil spring 5. That is, the protrusion 72 supports the coil spring 5 from the inside.
  • the plate 8 covers the side surface on one side of the outer ring 3 in the axial direction.
  • the cover 9 covers the other side surface of the outer ring 3 in the axial direction.
  • the pocket portion 10 is covered with the plate 8 and the cover 9. That is, the plate 8 and the cover 9 prevent the roller 4 and the coil spring 5 in the pocket portion 10 from dropping from the pocket portion 10.
  • the plate 8 is a disk-like member and has a hole 8a in the center.
  • the shaft member 2 passes through the hole 8a.
  • the plate 8 is fixed to the outer ring 3 by bolts (not shown).
  • the cover 9 is a disk-shaped member and has a hole 9a at the center.
  • the shaft member 2 passes through the hole 9a.
  • the cover 9 has a cylindrical portion 9b at the outer peripheral end portion.
  • the cylindrical portion 9 b covers the outer peripheral large diameter portion of the outer ring 3.
  • the cylindrical portion 9b is formed by bending the outer peripheral end portion of the cover 9 in the axial direction.
  • the tip of the cylindrical portion 9 b is caulked to the step portion of the outer ring 3. With such a structure, the cover 9 is fixed to the outer ring 3.
  • the cover 9 is formed with a plurality of guides 9c.
  • the guide 9 c is formed so as to enter the pocket portion 10 from the inner peripheral end of the cover 9.
  • the guide 9c is formed by bending a part of the inner periphery of the cover 9 to the plate 8 side.
  • the guide 9c has a length that covers almost the entire length of the side wall portion 62 of the spring cap 6.
  • the guide 9c supports the inner peripheral side of the side wall part 62, and guides that the spring cap 6 moves to the circumferential direction. As shown in FIG. 4, even if the roller 4 has moved to a position where it abuts against the first side wall portion 15 (this state does not occur in a normal operation), the guide 9c is attached to the spring cap 6.
  • the length is set so as to abut.
  • the coil spring 5 expands and contracts.
  • the outer periphery of the coil spring 5 is supported by the side wall 62 of the spring cap 6, and the inner periphery is supported by the protrusion 72 of the spring seat 7.
  • the spring cap 6 is guided to move in the circumferential direction by a guide 9c. Therefore, the coil spring 5 expands and contracts straight along its central axis without being deformed to the outer peripheral side or the inner peripheral side.
  • the guide 9c may be formed on the plate side. Moreover, you may form in both a cover and a plate.
  • the spring cap is made of resin, but the plate member may be formed by sheet metal processing.
  • the plate 8 is provided in the embodiment, the plate 8 may be omitted.
  • the coil spring can be expanded and contracted in a stable state without forming a through hole in the outer ring.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

La présente invention aborde le problème consistant à permettre à un ressort hélicoïdal d'un embrayage à roue libre d'être étendu/contracté tout en étant dans une position stabilisée, sans former un trou traversant dans un chemin de roulement extérieur. Cet embrayage à roue libre comporte un chemin de roulement extérieur (3), un rouleau (4), un ressort hélicoïdal (5), un capuchon de ressort (6) et une feuille de ressort (7). Le chemin de roulement extérieur (3) possède une partie poche (10) prévue profondément en retrait vers l'extérieur dans la direction radiale, et est situé à l'extérieur d'un élément arbre (2) dans la direction radiale. Le rouleau (4) est logé dans la partie poche (10). Le ressort hélicoïdal (5) est logé dans la partie poche (10) et sollicite le rouleau (4) dans la direction circonférentielle. Le capuchon de ressort (6) est situé entre le ressort hélicoïdal (5) et le rouleau (4), et soutient au moins une partie de la circonférence externe du ressort hélicoïdal (5). La feuille de ressort (7) est située entre le ressort hélicoïdal (5) et une surface de paroi de la partie poche (10), et soutient au moins une partie de la circonférence interne du ressort hélicoïdal (5).
PCT/JP2017/032492 2016-10-12 2017-09-08 Embrayage à roue libre WO2018070154A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-200534 2016-10-12
JP2016200534A JP6682416B2 (ja) 2016-10-12 2016-10-12 一方向クラッチ

Publications (1)

Publication Number Publication Date
WO2018070154A1 true WO2018070154A1 (fr) 2018-04-19

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ID=61905272

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Application Number Title Priority Date Filing Date
PCT/JP2017/032492 WO2018070154A1 (fr) 2016-10-12 2017-09-08 Embrayage à roue libre

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JP (1) JP6682416B2 (fr)
WO (1) WO2018070154A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114930175A (zh) * 2020-01-10 2022-08-19 日本电产理德股份有限公司 接触器、检查治具、检查装置及接触器的制造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012733U (ja) * 1983-07-04 1985-01-28 三菱電機株式会社 オ−バランニングクラツチ
JP2003222164A (ja) * 2002-01-25 2003-08-08 Honda Motor Co Ltd 一方向クラッチ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012733U (ja) * 1983-07-04 1985-01-28 三菱電機株式会社 オ−バランニングクラツチ
JP2003222164A (ja) * 2002-01-25 2003-08-08 Honda Motor Co Ltd 一方向クラッチ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114930175A (zh) * 2020-01-10 2022-08-19 日本电产理德股份有限公司 接触器、检查治具、检查装置及接触器的制造方法

Also Published As

Publication number Publication date
JP6682416B2 (ja) 2020-04-15
JP2018062965A (ja) 2018-04-19

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