JP2017180517A - One-way clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide one-way clutch showing a low idling torque and capable of being used stably for a long period of time.SOLUTION: A pair of pressing pieces 15b of a leaf spring 15 for pushing a roller 13 into a narrow part of a wedge-shaped space 16 between an inner ring 11 and an outer ring 12 is formed into an article for pressing a semi-cylindrical surface at a side facing to the inner ring 11 of the roller 13 to enable an idling torque to be reduced stably and at the same time a column part 14b of a holder 14 to which the leaf spring 15 is fixed is provided with a stopper 14f for restricting a motion of the roller 13 toward an expanded side of the wedge-shaped space 16 at a place closer to the roller 13 than a linking piece 15c supporting each of the pressing pieces 15b of the leaf spring 15, thereby even if the roller 13 moves to the expanded side of the wedge-shaped space 16 during idling operation and deforms the pressing pieces 15b of the leaf spring 15 more than a design value, the roller 13 does not strike against the linking piece 15c of the leaf spring 15 and abnormal wear is not caused at the linking piece 15c of the leaf spring 15.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a one-way clutch used for a fishing tackle reel or the like.

  The one-way clutch has an outer ring coaxially arranged on the radially outer side of the inner ring, a cylindrical surface is provided on the outer periphery of the inner ring, and a plurality of cam surfaces that are inclined in one direction are provided on the inner periphery of the outer ring. A wedge-shaped space that gradually narrows on one side in the circumferential direction is formed, and the rollers incorporated in each wedge-shaped space are rotatably held by a cage fixed to the outer ring, and are elastic members attached to the cage In many cases, each roller is pushed into a narrow portion of the wedge-shaped space and engaged with the inner ring and the outer ring (see, for example, Patent Document 1).

  An example of a fishing tackle reel using the one-way clutch configured as described above is shown in FIG. This fishing gear reel has a main gear shaft 3 passed through the inner periphery of the one-way clutch 1 via a clutch shaft 2, a handle 4 is attached to one end side of the main gear shaft 3, and a drive gear 5 is attached to the other end side of the main gear shaft 3. Is engaged with a driven gear 8 attached to the rotating shaft 7 of the spool 6 around which the fishing line is wound. The one-way clutch 1 is not shown in the figure, but the outer ring is fixed, and the inner ring is integrated with the main gear shaft 3 via the clutch shaft 2.

  In this fishing tackle reel, when a torque is applied in the direction in which the fishing line is fed out from the fish or the like on the fishhook to the spool 6, the roller of the one-way clutch 1 is engaged with the inner and outer rings, and the main gear shaft 3 is integrated with the inner ring. Is locked so that the spool 6 stops and the fishing line is not fed out. On the other hand, when the main gear shaft 3 is rotated in the reverse direction integrally with the inner ring of the one-way clutch 1 by the handle 4, the roller of the one-way clutch 1 moves to the wide side of the wedge-shaped space against the elastic force of the elastic member. When the engagement between the inner and outer rings is released, the main gear shaft 3 rotates idle together with the inner ring, and the rotation is transmitted to the rotating shaft 7 of the spool 6 via the drive gear 5 and the driven gear 8. You can wind up the fishing line.

No. 1-33471

  By the way, a fishing tackle reel is generally required to be able to smoothly rotate a spool without rotating unevenness when the handle is rotated. For this reason, the one-way clutch used for the fishing tackle reel as shown in FIG. 1 is required to reduce and stabilize the idling torque.

  In response to such demands, the present inventors have developed a one-way clutch shown in FIGS. 11 and 12 (a) and 12 (b). The basic configuration of this one-way clutch is the same as that of the conventional one described above. The outer ring 52 is coaxially arranged on the radially outer side of the inner ring 51, the cylindrical surface 51 a is provided on the outer periphery of the inner ring 51, A plurality of cam surfaces 52 a inclined in one direction are provided on the circumference, and wedge-shaped spaces 53 that gradually narrow on one side in the circumferential direction are formed between the cylindrical surfaces 51 a and the respective cam surfaces 52 a, and are incorporated into the respective wedge-shaped spaces 53. The roller 54 is rotatably held by a retainer 55 fixed to the outer ring 52, and each roller 54 is pushed into a narrow portion of the wedge-shaped space 53 by a leaf spring 56 as an elastic member attached to the retainer 55. 51 and the outer ring 52 are engaged.

  Here, the retainer 55 includes a pair of annular portions 55a attached to the outer ring 52 and a plurality of column portions 55b connecting the annular portions 55a, and one roller 54 is provided between the column portions 55b. Hold one by one.

  The leaf spring 56 includes an L-shaped attachment piece 56a attached to the column portion 55b of the cage 55, and a pair of pressing pieces 56b that press the semicylindrical surface of the roller 54 facing the inner ring 51. The mounting pieces 56a and the connecting pieces 56c that connect the pressing pieces 56b at positions facing the rollers 54 pressed by the pressing pieces 56b.

  This one-way clutch has a pair of pressing pieces 56b of a leaf spring 56 having a narrow shape so that the spring constant is smaller than that of the one described in Patent Document 1, and each pressing piece 56b is a roller during idling. Since the friction between the roller 54 and the inner ring 51 is reduced by urging the outer surface 54 in the radial direction, the idling torque can be stably reduced.

  However, it has been found that when this one-way clutch is used for a fishing tackle reel having a cantilever support structure, there are the following durability problems.

  That is, in the fishing tackle reel with a cantilever support structure, as shown in FIG. 1, the rotating shaft 7 of the spool 6 is supported at both ends by ball bearings 9, but the drive gear 5 is attached to the main gear shaft 3. Since only the other end is supported by the ball bearing 9, the one-way clutch 1 also receives a radial load. Therefore, when the one-way clutch 1 shown in FIG. 11 and FIG. 12 is used for the one-way clutch 1 shown in FIG. 1, when the main gear shaft 3 is rotated in the idling direction by the handle 4, the roller moves to the wide side of the wedge-shaped space 53. Some of 54 may receive a large offset load in the moving direction, deform the pressing piece 56b of the leaf spring 56 to a design value or more, and collide with the connecting piece 56c of the leaf spring 56. When the collision of the roller 54 with the leaf spring connecting piece 56c is repeated, the leaf spring connecting piece 56c is abnormally worn and broken.

  On the other hand, if the spring constant of the pressing piece 56b of the leaf spring 56 is increased, the durability of the one-way clutch 1 can be improved by making it difficult for the roller 54 to collide with the leaf spring coupling piece 56c. In this case, idling torque tends to increase.

  Therefore, an object of the present invention is to provide a one-way clutch that has a low idling torque and can be used stably for a long period of time.

  In order to solve the above problems, the present invention includes an inner ring to which an input torque is applied, an outer ring disposed coaxially with the inner ring on the radially outer side of the inner ring, and a plurality of rollers incorporated between the inner ring and the outer ring. A retainer that holds the rollers in a freely rolling manner, and a plurality of leaf springs that press the rollers in a predetermined direction. A cylindrical surface is provided on the outer periphery of the inner ring, and an inner periphery of the outer ring. Is provided with a plurality of cam surfaces inclined in one direction, and a wedge-shaped space gradually narrowing on one side in the circumferential direction is formed between the cylindrical surface of the inner ring and the cam surfaces of the outer ring. The rollers are arranged in each of these wedge-shaped spaces, and the cage has a pair of annular portions attached to the outer ring connected by a plurality of column portions, and holds the rollers between the column portions. And the leaf spring is attached to each column of the cage. In the one-way clutch in which the roller is pushed into the narrow part of the wedge-shaped space, the leaf spring presses the mounting piece attached to the pillar part of the cage and the semi-cylindrical surface on the side facing the inner ring of the roller. And a connecting piece for connecting the mounting piece and the pressing piece at a position facing the roller pressed by the pressing piece, and the cage is closer to the roller than the connecting piece of the leaf spring Therefore, a configuration is adopted in which a stopper is provided to restrict the movement of the roller toward the wide side of the wedge-shaped space.

  According to the above configuration, since the pressing piece of the leaf spring presses the semi-cylindrical surface on the side facing the inner ring of the roller, the idling torque can be stably reduced by making the pressing piece have a small spring constant. Even if the roller moving to the wide side of the wedge-shaped space deforms the pressing piece of the leaf spring beyond the design value, the movement of the roller is restricted by the stopper of the cage, so the roller is connected to the leaf spring. It does not collide with the piece, damage to the connecting piece of the leaf spring can be prevented, and it can be used stably for a long time.

  Here, the stopper of the retainer may be provided on the pillar portion of the retainer on the radially outer side or the radially inner side than the pressing piece of the leaf spring.

  When the connecting piece of the leaf spring extends in the radial direction at a position facing the axial central portion of the roller, the stopper of the cage is located radially outside the pressing piece of the leaf spring. A pair of plate springs may be provided on both sides of the connecting pieces, or may be configured to extend in the axial direction radially inward from the pressing pieces of the plate springs.

  As described above, the one-way clutch of the present invention is configured such that the pressing piece of the leaf spring presses the semi-cylindrical surface on the side facing the inner ring of the roller, and the roller is a connecting piece of the leaf spring by a stopper provided in the cage. Therefore, it is possible to achieve both reduction in idling torque and ensuring durability.

Schematic showing an example of a fishing tackle reel using a one-way clutch The longitudinal cross-sectional view of the principal part of the one-way clutch of 1st Embodiment 1 is an exploded perspective view of the one-way clutch of FIG. 1 excluding inner and outer rings. a is a top view excluding the inner and outer rings in FIG. 2, and b is a front view of a. Explanatory drawing of the operation of the one-way clutch corresponding to FIG. Explanatory drawing of operation | movement of the one-way clutch corresponding to Fig.4 (a) The longitudinal cross-sectional view of the principal part of the one-way clutch of 2nd Embodiment a is a top view excluding the inner and outer rings in FIG. 7, and b is a front view of a. Explanatory drawing of the operation of the one-way clutch corresponding to FIG. Explanatory drawing of operation | movement of the one-way clutch corresponding to Fig.8 (a) Longitudinal sectional view of the main part of a conventional one-way clutch a is a top view excluding inner and outer rings in the vicinity of one roller in FIG. 11, and b is a front view of a.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 10. 2 to 6 show the first embodiment. This one-way clutch is used for a fishing reel having a cantilever support structure as shown in FIG. 1, and the basic configuration is the same as that shown in FIGS.

  That is, as shown in FIGS. 2 and 3, the one-way clutch is incorporated between the inner ring 11, the outer ring 12 arranged coaxially with the inner ring 11 on the radially outer side of the inner ring 11, and the inner ring 11 and the outer ring 12. A plurality of rollers 13, a retainer 14 that holds each roller 13 in a rollable manner, and a plurality of leaf springs 15 that press each roller 13 in a predetermined direction are provided. Although not shown, the outer ring 12 is fixed to the fishing tackle reel, and the inner ring 11 is integrated with the main gear shaft via the clutch shaft so that input torque can be applied from a handle attached to the main gear shaft. (See FIG. 1).

  A cylindrical surface 11 a is provided on the outer periphery of the inner ring 11, and a plurality of cam surfaces 12 a inclined in one direction are provided on the inner periphery of the outer ring 12, and the cylindrical surface 11 a of the inner ring 11 and the cam surfaces 12 a of the outer ring 12 are provided. A wedge-shaped space 16 that is gradually narrowed on one side in the circumferential direction is formed therebetween. One roller 13 is disposed in each wedge-shaped space 16.

  4 (a) and 4 (b), the retainer 14 includes a pair of annular portions 14a and a plurality of column portions 14b that connect the annular portions 14a, and each annular portion 14a. A plurality of fitting protrusions 14c provided on the outer periphery of the outer ring 12 are fitted into pockets formed by the cam surface 12a of the outer ring 12 and a curved surface continuous thereto, and each annular part 14a is attached to the outer ring 12, The roller 13 is held between the column portions 14b so as to be able to roll.

  The pillar portion 14b of the retainer 14 is provided with a protruding piece 14d at the axial center of one side surface, and a pair of protrusions 14e for attaching the leaf spring 15 at a position sandwiching the protruding piece 14d in the axial direction. Yes. The projecting piece 14d protrudes larger in the circumferential direction as it approaches the center on the radially inner side, and prevents the roller 13 from falling off inward in the radial direction. In addition, a pair of stoppers 14 f that protrude toward the roller 13 are provided on the other side surface of the column portion 14 b.

  The leaf spring 15 has a pair of L-shaped mounting pieces 15a mounted on the outer peripheral surface and one side surface of the pillar portion 14b of the cage 14 and a pair of semi-cylindrical surfaces on the side facing the inner ring 11 of the roller 13. The pressing piece 15b and the attachment piece 15a and the pressing piece 15b are connected (supporting each pressing piece 15b) at a position facing the roller 13 pressed by each pressing piece 15b.

  The mounting piece 15a of the leaf spring 15 has a notch 15d and a fitting hole 15e into which the protruding piece 14d and the pair of protrusions 14e of the retainer 14 are respectively fitted in a portion extending along one side surface of the pillar portion 14b of the retainer 14. Is provided. The connecting piece 15c extends radially inward from the other side edge of the mounting piece 15a at a position facing the axial center of the roller 13, and the pressing piece 15b extends obliquely with respect to the axial direction from both sides of the tip. ing. Then, the mounting piece 15a and the connecting piece 15c sandwich the pillar portion 14b of the retainer 14 from both sides in the circumferential direction, whereby the entire leaf spring 15 is attached to the pillar portion 14b of the retainer 14, and each pressing piece 15b is a roller. 13 is pushed into the narrow portion of the wedge-shaped space 16 to be engaged with the inner ring 11 and the outer ring 12.

  Further, since the leaf spring 15 is attached to the column portion 14b of the retainer 14 as described above, the pair of stoppers 14f of the retainer 14 is radially outward from the pressing piece 15b of the leaf spring 15, and the plate The roller 15 is opposed to the roller 13 at positions on both sides of the connecting piece 15 c of the spring 15.

  The one-way clutch has the above-described configuration, and even when the counterclockwise torque in FIG. 2 is applied to the inner ring 11, the roller 13 pressed by the pressing piece 15 b of the leaf spring 15 is connected to the inner ring 11 and the fixed outer ring 12. Since it is engaged, the inner ring 11 does not rotate. On the other hand, when the clockwise torque in FIG. 2 is applied to the inner ring 11, the roller 13 moves to the wide side of the wedge-shaped space 16 against the elasticity of the leaf spring 15, and the roller 13, the inner ring 11, and the outer ring 12 are moved. Is released, the inner ring 11 is idled.

  Here, the pressing piece 15b of the leaf spring 15 has a narrow shape and can reduce the spring constant as in the case of FIGS. 11 and 12, and also presses the semi-cylindrical surface of the roller 13 facing the inner ring 11. Since the roller 13 and the inner ring 11 can be reduced in friction by urging the roller 13 radially outward during idling, the idling torque can be stably reduced.

  Moreover, when the inner ring 11 is switched from the stopped state to the idling state, some of the rollers 13 that move to the wide side of the wedge-shaped space 16 due to the radial load received by the one-way clutch cause the pressing piece 15b of the leaf spring 15 to move. Even when the deformation is greater than the design value, the movement of the roller 13 is restricted by the stopper 14f of the retainer 14 on the side closer to the roller 13 than the connecting piece 15c of the leaf spring 15, as shown in FIGS. Therefore, the roller 13 does not collide with the connecting piece 15 c of the leaf spring 15. Therefore, even if it is used for a fishing tackle reel having a cantilever support structure, there is no possibility that abnormal wear will occur on the connecting piece 15c of the leaf spring 15, and it can be used stably for a long time.

  7 to 10 show a second embodiment. In this embodiment, as shown in FIG. 7 and FIGS. 8A and 8B, the connecting piece 15c of the leaf spring 15 of the first embodiment is shortened, and the retainer 14 is connected to the connecting member of the first embodiment. Instead of the pair of stoppers 14f on both sides of the piece 15c, stoppers 14g extending in the axial direction on the radially inner side of the pressing piece 15c of the leaf spring 15 are provided.

  Also in the second embodiment, as shown in FIGS. 9 and 10, when the inner ring 11 is switched from the stopped state to the idling state, a part of the rollers 13 deforms the pressing piece 15 b of the leaf spring 15 to a design value or more. In addition, the stopper 14g of the retainer 14 restricts the movement of the roller 13 toward the wide side of the wedge-shaped space 16 on the side closer to the roller 13 than the connecting piece 15c of the leaf spring 15, and moves to the leaf spring connecting piece 15c of the roller 13. Therefore, it is possible to achieve both reduction in idling torque and ensuring durability.

  The present invention is not limited to the one-way clutch used in the fishing tackle reel having the cantilevered support structure as in each of the above-described embodiments, but is particularly effectively applied to a one-way clutch used under conditions that receive a radial load. be able to.

DESCRIPTION OF SYMBOLS 1 One-way clutch 2 Clutch shaft 3 Main gear shaft 4 Handle 5 Drive gear 6 Spool 7 Rotating shaft 8 Drive gear 9 Ball bearing 11 Inner ring 11a Cylindrical surface 12 Outer ring 12a Cam surface 13 Roller 14 Cage 14a Annular part 14b Column part 14f, 14g Stopper 15 leaf spring 15a mounting piece 15b pressing piece 15c connecting piece 16 wedge-shaped space

Claims (4)

An inner ring to which an input torque is applied, an outer ring disposed coaxially with the inner ring on the outer side in the radial direction of the inner ring, a plurality of rollers incorporated between the inner ring and the outer ring, and a holder that holds the rollers in a freely rolling manner. And a plurality of leaf springs that press the rollers in a predetermined direction,
A cylindrical surface is provided on the outer periphery of the inner ring, and a plurality of cam surfaces inclined in one direction are provided on the inner periphery of the outer ring, and between the cylindrical surface of the inner ring and each cam surface of the outer ring. Wedge-shaped spaces that are gradually narrowed on one side in the circumferential direction are formed, the rollers are arranged in each of these wedge-shaped spaces, and the pair of annular portions attached to the outer ring has a plurality of columns. One-way clutch connected to each other, holding the roller between the pillars, and the leaf springs being attached to the pillars of the cage to push the rollers into the narrow part of the wedge-shaped space In
The leaf spring includes a mounting piece mounted on a pillar portion of the cage, a pressing piece that presses the semi-cylindrical surface on the side facing the inner ring of the roller, and a position facing the roller that the pressing piece presses. The retainer comprises a connecting piece for connecting the mounting piece and the pressing piece, and the retainer is provided with a stopper for restricting the movement of the roller toward the wedge-shaped space on the side closer to the roller than the connecting piece of the leaf spring. A one-way clutch characterized by   2. The one-way clutch according to claim 1, wherein the stopper of the retainer is provided on a column portion of the retainer on a radially outer side or a radially inner side than a pressing piece of the leaf spring.   The connecting piece of the leaf spring extends in a radial direction at a position facing the axial center of the roller, and the stopper of the cage is connected to the leaf spring radially outside the pressing piece of the leaf spring. The one-way clutch according to claim 2, wherein a pair is provided on both sides of the piece.   The connecting piece of the leaf spring extends in the radial direction at a position facing the axial center of the roller, and the stopper of the cage extends in the axial direction radially inward of the pressing piece of the leaf spring. The one-way clutch according to claim 2, wherein

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