JP2016114138A - One-way clutch and starter equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable one-way clutch excelling in assemblability and satisfactorily holding grease, and to provide a scooter equipped with the same.SOLUTION: A one-way clutch is configured to have a pair of semicircular plates 14. The semicircular plates are held between a clutch outer 10 and a clutch cover 16 to be pressed against the clutch outer via an elastic body 15. The semicircular plate has a cutout 17a in the outer periphery, and the elastic body flows in the cutout to press the mating surface 17 of the semicircular plate against the mating surface 17 of the other semicircular plate.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a one-way clutch and a starter provided with the one-way clutch.

  A one-way clutch used for a starter for starting an engine is composed of a clutch outer that receives rotation of a motor and accommodates a roller and a spring, and a clutch inner that transmits rotation only in one direction via the roller. The clutch outer roller and spring housing is filled with grease and a thin disc plate that prevents grease from splashing is placed at one end of the clutch outer, and the outer periphery of the plate is pressed against an elastic member such as rubber. Are known.

  Here, the plate has a predetermined gap with respect to the outer periphery of the clutch inner, and is close to a pinion that is integrally formed with the clutch inner and has a larger diameter than the outer diameter of the clutch inner, thereby taking into consideration the ease of incorporation. It is known to have a substantially semicircular shape.

JP 2002-204553 A

  When the plate is attached to one end of the clutch outer, it is necessary to prevent the outflow of grease by bringing both mating surfaces of the semicircular plate into close contact with each other. However, in the conventional configuration, the tight contact state of the plate becomes unstable, and it is necessary to consider the work in order to prevent the grease from flowing out.

  Accordingly, an object of the present invention is to solve such problems, and to provide a one-way clutch that is excellent in assembling property, has good grease retention, and is highly reliable, and a starter provided with the one-way clutch.

  In order to solve the above problems, for example, the configuration described in the claims is adopted.

  The present application includes a plurality of means for solving the above-described problems. For example, the present application has a pair of semicircular plates, and the semicircular plates are elastic between the clutch outer and the clutch cover. The semicircular plate has a notch in the outer peripheral portion, and the elastic body flows into the notch, and the mating surface of the semicircular plate is It is characterized by pressing against the mating surface of another semicircular plate.

  According to the present invention, it is possible to provide a one-way clutch that is excellent in assemblability, has good grease retention, and is highly reliable, and a starter equipped with the one-way clutch.

  Problems, configurations, and effects other than those described above will become apparent from the description of the following examples.

The figure which shows the structure of the starter incorporating a one-way clutch. The figure which shows the structure of a one way clutch. The figure which shows the plate integrated in a one-way clutch (Example 1). The figure which shows the plate integrated in a one-way clutch (Example 2). The figure which shows the plate integrated in a one-way clutch (Example 3).

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing the structure of a starter incorporating a one-way clutch of this embodiment. The starter 1 includes a mag switch 2, a pinion body 3, and a motor 4. When a current flows from a battery to an excitation coil housed in the mag switch 2, the plunger 5 is attracted and the pinion body 3 is moved to the shift lever 6. Then, the pinion body 3 is engaged with the ring gear 7. Simultaneously with the suction of the plunger 5, a current flows through the motor 4 to obtain rotational energy, and the rotational energy is transmitted to the pinion body 3 through the reduction gear 8 to rotate the ring gear 7 and start the engine.

  The pinion body 3 is supported so as to be movable on the axis of the pinion shaft 8, and the rotational force of the motor is transmitted by a spline 9 provided on the outer periphery of the pinion shaft 8. The clutch outer 10, the roller 11, the spring shown in FIG. A rotational force is transmitted to the pinion 13 via a one-way clutch (not shown) and a clutch inner 12.

  FIG. 2 is a diagram showing the structure of the one-way clutch of this embodiment. In the one-way clutch, a roller 11 and a spring are accommodated in the opening of the clutch outer 10, and a semicircular plate 14 that closes the opening is mounted in pairs, and an elastic member (for example, a rubber material) is attached to the outer periphery of the plate 14. A ring 15 is mounted, a bottomed cylindrical clutch cover 16 is mounted to cover the ring, and an opening of the clutch cover 16 is formed along the outer peripheral surface of the clutch outer 10 to form the pinion body 3. .

  FIG. 3 is a view showing a plate incorporated in the one-way clutch of the present embodiment. A part of the outer periphery of the semicircular plate 14 is provided with a notch 17a that forms a surface substantially parallel to the joint 17 with the mating plate. The semicircular plate 14 is incorporated in the opening of the clutch outer 10 and forms the opening of the clutch cover 16 while applying a predetermined compressive force to the ring 15 of the elastic member.

  The ring 15 of the elastic member is pushed into a notch 17a provided on the outer periphery of the plate 14, and expands in a direction (radial direction) perpendicular to the compression direction (axial direction) of the ring 15 within the notch. As a result, the plate 14 is moved toward the axial center. As a result, it is possible to maintain close contact at the joint of the plate 14 and reliably prevent the grease filled in the clutch from leaking from the joint 17 of the plate 14.

  In the present embodiment, the notch 17a is provided at a portion farthest from the joint of the plate 14.

  The plate 14 is generally manufactured by press punching a thin metal material. However, by providing a notch 17a substantially parallel to the joint 17 on the outer peripheral surface, a small amount of metal plate material during press punching is provided. The cost can be reduced.

  FIG. 4 is a diagram showing another form of the semicircular plate 14. In the first embodiment, a notch 17a substantially parallel to the seam 17 is provided near the center of the outer periphery of the plate 14, but as shown in FIG. Even in the configuration in which the arc-shaped notch 17b is provided, the same effect as in the first embodiment can be obtained.

  FIG. 5 is a view showing still another form of the semicircular plate 14. The same effect can be obtained by providing a notch 17c at a position symmetrical to the center line of the outer periphery of the plate 14 as shown in FIG.

  The elastic member ring 15 is also provided with a thick portion along the steps of the notches 17a, 17b, and 17c provided in the plate 14, or by attaching another elastic member, so that the elastic member is compressed in the compression direction. A large expansion in the direction at right angles is obtained, and the effect of further improving the adhesion between the plates 14 is obtained.

  As described above, according to the present invention, when an elastic member such as rubber disposed on the outer periphery of the plate is closely attached to the outer periphery of the plate and incorporated, the outer periphery of the plate outer peripheral surface (notch) provided substantially parallel to the mating surface The elastic member is filled in, the elastic member is compressed, and the elastic member expands in a direction perpendicular to the compression direction, so that the plate moves in the direction of the mating surface. In other words, the elastic body flows into the cutout at the outer periphery of the semicircular plate, and the mating surface of the semicircular plate is pressed against the mating surfaces of the other semicircular plates. As a result, the mating surfaces of both plates can be brought into close contact with each other.

  As a result, the mating surfaces of the plates can be brought into close contact without manual work, and the clutch grease can be stably held.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 Starter 2 Mag switch 3 Pinion body 4 Motor 5 Plunger 6 Shift lever 7 Ring gear 8 Pinion shaft 9 Spline 10 Clutch outer 11 Roller 12 Clutch inner 13 Pinion 14 Plate 15 Ring 16 Clutch cover 17 Joint 17a, 17b, 17c Notch

Claims (6)

Having a pair of semicircular plates,
The semicircular plate is held between the clutch outer and the clutch cover so as to be pressed against the clutch outer via an elastic body,
The semicircular plate has a notch in the outer peripheral portion, the elastic body flows into the notch, and presses the mating surface of the semicircular plate against the mating surface of another semicircular plate A one-way clutch characterized by that. The one-way clutch according to claim 1,
The one-way clutch, wherein the notch has a linear shape substantially parallel to a mating surface of the semicircular plate. The one-way clutch according to claim 1,
The one-way clutch, wherein the notch has an arc shape. The one-way clutch according to claim 1 or 2,
The one-way clutch, characterized in that the notch is provided on the outer peripheral portion of the semicircular plate and at a position farthest from the joint of the semicircular plate. The one-way clutch according to claim 1 or 3,
A plurality of the notches are provided in one semicircular plate,
The one-way clutch, wherein the notch is provided at a position that is an outer peripheral portion of the semicircular plate and is symmetrical with respect to a center line of the semicircular plate.   A starter comprising the one-way clutch according to any one of claims 1 to 5.