JP4457717B2 - One-way clutch unit - Google Patents

Description

  The present invention relates to a one-way clutch unit, for example, a one-way clutch unit suitable for transmitting power to a drum or the like of a washing machine.

  Conventionally, as a one-way clutch unit, there is one described in JP-A-11-94054 (Patent Document 1).

  This one-way clutch unit includes an inner ring, an outer ring, engagement rollers, and balls. A plurality of flat engagement cam surfaces are formed in a substantially central portion in the axial direction of the outer peripheral surface of the inner ring at predetermined intervals in the circumferential direction, and the engagement cam surface on the inner peripheral surface of the outer ring A cylindrical engagement surface is formed at a location facing the. Between the plurality of engagement cam surfaces and the cylindrical engagement surface, a plurality of engagement rollers held by an engagement roller retainer are disposed. Specifically, an urging spring is disposed between the column portion of the engagement roller retainer and the engagement roller. The urging spring urges the engaging roller disposed in the pocket of the engaging roller cage in one direction.

  An annular groove is formed at both axial ends of the inner peripheral surface of the outer ring, and an annular groove is formed at a location facing the outer ring annular groove on the outer peripheral surface of the inner ring. Between each annular groove at both axial ends of the inner peripheral surface of the outer ring and each annular groove at both axial ends of the outer peripheral surface of the inner ring, the balls held by the ball cage are: Several are arranged.

  The engagement cam surface, the cylindrical engagement surface, the retainer for engagement roller, the biasing spring, and the engagement roller constitute a one-way clutch portion of the one-way clutch unit. Also, an annular groove at one end portion in the axial direction of the outer ring, an annular groove of the inner ring facing the annular groove, a ball disposed between the two annular grooves, and a ball holder holding the ball The vessel constitutes a first ball bearing portion, and is disposed between the two annular grooves, an annular groove at the other end in the axial direction of the outer ring, an annular groove of the inner ring facing the annular groove, and The ball and the ball cage that holds the ball constitute a second ball bearing portion.

  As described above, this one-way clutch unit has two ball bearings arranged at both ends of the one-way clutch unit, so that when the moment load or excessive radial load is applied to the one-way clutch unit, A load or an excessive radial load is received not by the one-way clutch portion but by the two ball bearing portions. In this way, the one-way clutch unit can stably perform the clutch operation of the one-way clutch portion even in a situation where moment load or excessive radial load is applied to the one-way clutch unit. Yes.

However, since the one-way clutch unit has ball bearing portions on both sides in the axial direction of the one-way clutch portion, there is a problem that the dimension in the axial direction becomes large and the one-way clutch unit becomes large. Further, since the two ball bearing portions are provided on both sides in the axial direction of the one-way clutch portion, there is a problem that the number of parts increases and the manufacturing cost of the one-way clutch unit is high.
Japanese Patent Laid-Open No. 11-94054 (FIG. 1)

  SUMMARY OF THE INVENTION An object of the present invention is to provide a one-way clutch unit that can normally perform clutch operation even when a moment load or an excessive radial load is applied, and that is compact and low in manufacturing cost.

In order to solve the above-described problem, a one-way clutch unit of the present invention includes:
An outer ring having an engagement surface and a raceway groove located only on one side in the axial direction with respect to the engagement surface on the inner periphery;
An inner ring having an engagement surface and a raceway groove located only on one side in the axial direction with respect to the engagement surface on the outer periphery;
An engagement element disposed between the engagement surface of the outer ring and the engagement surface of the inner ring;
A ball disposed between the raceway groove of the outer ring and the raceway groove of the inner ring,
In the outer ring or the inner ring, the diameter of the shoulder on one side of the raceway groove is different from the diameter of the shoulder on the other side, and between the shoulder of the outer ring and the shoulder of the inner ring on one side distances, much larger than the distance between the shoulder portion of the outer ring and the inner ring shoulder portion of the other side,
The one-way clutch unit , wherein the engagement element is located on the one side of the raceway groove .

  In this specification, the engagement surface refers to a surface with which the engagement element engages. More specifically, when the engagement element is an engagement roller, the cylindrical engagement surface or the engagement cam surface is an engagement surface. When the engagement element is a sprag or the like, the surface on which the sprag or the like is engaged is defined. This is called the engagement surface.

  According to the one-way clutch unit of the invention, a raceway groove is formed only on one side in the axial direction with respect to the inner circumference of the outer ring and the engagement surface of the inner ring, and a ball bearing portion is provided only on one side in the axial direction of the one-way clutch unit. Since it is formed, raceway grooves are formed on both sides in the axial direction of the inner ring of the outer ring and the engagement surface of the outer ring of the inner ring, and ball bearings are formed on both sides in the axial direction of the one-way clutch unit. Compared with the clutch unit, the axial dimension of the one-way clutch unit can be remarkably reduced, and the number of parts such as balls arranged between the inner and outer rings can be greatly reduced. Therefore, the size of the one-way clutch unit can be remarkably reduced, and the manufacturing cost of the one-way clutch unit can be greatly reduced.

  Further, according to the one-way clutch unit of the invention, the ball is disposed between the raceway grooves of the inner and outer rings and the ball bearing portion is formed so as to be adjacent to the one-way clutch portion. Even if an excessive radial load is applied, the ball bearing portion can receive the load. Therefore, even in a situation where an excessive radial load is applied to the one-way clutch unit, the clutch operation of the one-way clutch unit can be performed stably.

  Further, according to the one-way clutch unit of the invention, in the outer ring or the inner ring, the diameter of the shoulder portion on one side of the raceway groove is different from the diameter of the shoulder portion on the other side, that is, Since the thickness of the shoulder on one side is different from the thickness of the shoulder on the other side, the shoulder of the ball is likely to climb on the shoulder with a large thickness due to the moment load (offset load). By forming the outer ring or the inner ring on one side of the raceway groove, the moment load can be reliably received, and the one-way clutch unit can be prevented from wobbling in the radial direction. Therefore, even in a situation where a moment load acts on the one-way clutch unit, the clutch operation of the one-way clutch unit can be performed stably.

  Further, according to the one-way clutch unit of the present invention, as described above, the thick shoulder portion is formed on one side of the raceway groove of the outer ring or the inner ring where the ball shoulder is likely to climb on the shoulder due to the moment load. Can effectively prevent the ball from climbing over the shoulder. Therefore, the raceway groove can be prevented from being damaged (peeling, etc.), and the life of the one-way clutch can be extended.

  The one-way clutch unit according to an embodiment includes a crown-shaped cage that holds the ball, and the annular portion of the crown-shaped cage is divided into a shoulder portion of the outer ring and a shoulder portion of the inner ring on the one side. It is characterized by having been arranged between.

  In this specification, the expression “the annular portion of the crown-shaped cage is disposed between the shoulder portion of the outer ring on one side and the shoulder portion of the inner ring” is used for the crown-shaped cage. Only a part of the annular part is included between the shoulder part of the outer ring on the one side and the shoulder part of the inner ring.

According to the above embodiment, the crown-shaped cage for holding the ball is provided, and the annular portion of the crown-shaped cage is disposed between the shoulder portion of the outer ring and the shoulder portion of the inner ring on the one side. Therefore, the radial thickness of the annular portion of the crown-shaped cage can be sufficiently secured. Therefore, even if the thickness of the shoulder portion on one side of the raceway groove is increased as in the present invention, the strength of the cage can be prevented from decreasing.
In one embodiment of the one-way clutch unit, the radial thickness of the annular portion of the crown type cage is a distance between the shoulder portion of the outer ring on the other side and the shoulder portion of the inner ring. It is characterized by being larger than.

  In one embodiment of the one-way clutch unit, the outer ring raceway groove, the inner ring raceway groove and the ball constitute a part of the deep groove ball bearing part or a part of the four-point contact ball bearing part. It is a feature.

  According to the embodiment, the raceway groove of the outer ring, the raceway groove of the inner ring, and the ball constitute a part of the deep groove ball bearing part or a part of the four-point contact ball bearing part. Can efficiently receive radial load and moment load.

  According to the one-way clutch unit of the present invention, the raceway groove is formed only on one side in the axial direction with respect to the inner periphery of the outer ring and the engagement surface of the inner ring, and the ball bearing portion is formed only on one side in the axial direction of the one-way clutch unit. Accordingly, the axial dimension of the one-way clutch unit can be remarkably reduced, and the number of parts such as balls arranged between the inner and outer rings can be greatly reduced. Therefore, the size of the one-way clutch unit can be remarkably reduced, and the manufacturing cost of the one-way clutch unit can be greatly reduced.

  In addition, according to the one-way clutch unit of the invention, the ball is disposed between the raceway grooves of the inner and outer rings and the ball bearing portion is formed so as to be adjacent to the one-way clutch portion. Even if a large radial load is applied, the load can be received by the ball bearing portion, and the clutch operation of the one-way clutch portion can be performed stably.

  According to the one-way clutch unit of the invention, in the outer ring or the inner ring, the diameter of the shoulder portion on one side of the raceway groove is different from the diameter of the shoulder portion on the other side. Since the wall thickness of the shoulder on the other side is different from the wall thickness of the shoulder on the other side, the outer or inner ring raceway where the shoulder of the ball is likely to climb on the shoulder due to the moment load. By forming on one side of the groove, a moment load can be reliably received. Therefore, even in a situation where a moment load is applied to the one-way clutch unit, the one-way clutch unit can be reliably prevented from wobbling in the radial direction, and the clutch operation of the one-way clutch unit can be performed stably.

  Further, according to the one-way clutch unit of the present invention, as described above, the thick shoulder portion is formed on one side of the raceway groove of the outer ring or the inner ring where the ball shoulder is likely to climb on the shoulder due to the moment load. Can effectively prevent the ball from climbing over the shoulder. Therefore, the raceway groove can be prevented from being damaged (peeling, etc.), and the life of the one-way clutch can be extended.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is an axial sectional view showing a rough configuration of the one-way clutch unit according to the first embodiment of the present invention.

  This one-way clutch unit includes an outer ring 1, an inner ring 2, engagement rollers 3, and balls 4.

  On the inner periphery of the outer ring 1, one cylindrical engagement surface 7 and one track groove 8 of a deep groove type having an arcuate cross section are formed so as to be adjacent in the axial direction. In other words, the outer ring 1 has a cylindrical engagement surface 7 and a raceway groove 8 located only on one side of the cylindrical engagement surface 7 in the axial direction on the inner periphery. A plurality of flat engagement cam surfaces 10 are formed at equal intervals in the circumferential direction on the outer periphery of the inner ring 2 at locations facing the cylindrical engagement surface 7 of the outer ring 1, and adjacent to the engagement cam surface 10. In addition, a deep groove type raceway groove 11 having an arc cross section is formed at a location facing the raceway groove 8 of the outer ring 1.

  A plurality of the engaging rollers 3 are arranged between the cylindrical engaging surface 7 of the outer ring 1 and the engaging cam surface 10 of the inner ring 2 at a constant interval in the circumferential direction while being held by the cage 13. Has been. A coil spring 17 is disposed between a column portion (not shown) of the cage 13 and the engaging roller 3. The coil spring 17 biases the engaging roller 3 disposed in the pocket of the cage 13 in one direction. The cylindrical engagement surface 7 of the outer ring 1, the engagement cam surface 10 of the inner ring 2, the cage 13, the coil spring 17, and the engagement roller 3 have a one-way clutch unit 20 on the left side in FIG. Forming.

  On the other hand, a plurality of the balls 4 are arranged between the raceway groove 8 of the outer ring 1 and the raceway groove 11 of the inner ring 2 with a certain interval in the circumferential direction while being held by the crown-shaped cage 15. Yes. The raceway groove 8 of the outer ring 1, the raceway groove 11 of the inner ring 2, the crown cage 15 and the ball 4 form a deep groove ball bearing 25 of a one-way clutch unit on the right side in FIG.

  In FIG. 1, reference numerals 26 and 27 denote seal members. The seal members 26 and 27 seal the raceway grooves 8 and 11 and the engagement surfaces 7 and 10, the engagement rollers 3, and the balls 4 of the outer ring 1 and the inner ring 2 from the outside.

  FIG. 2 is a partially enlarged sectional view showing details of the deep groove ball bearing portion 25 of the one-way clutch unit of the first embodiment.

  The deep groove ball bearing portion 25 receives a radial load and a moment load (offset load) indicated by an arrow A acting on the seal member 26 side with respect to the plane P including the center of the raceway grooves 8 and 11.

  As shown in FIG. 2, the thickness of the shoulder 30 of the outer ring 1 on the side where the moment load is applied to the plane P is equal to the thickness of the shoulder 31 of the outer ring 1 on the side opposite to the side where the moment load is applied. On the other hand, the thickness of the shoulder portion 33 of the inner ring 2 on the side on which the moment load is applied to the plane P is thicker than the thickness of the shoulder portion 34 of the inner ring 2 on the opposite side to the side on which the moment load is applied. Yes. In other words, the diameter of the shoulder 30 of the outer ring 1 on the side on which the moment load is applied to the plane P is equal to the diameter of the shoulder 31 of the outer ring 1 on the side opposite to the side on which the moment load is applied. The diameter of the shoulder 33 of the inner ring 2 on the side where the moment load is applied to P (the diameter indicates the distance between the axial center line of the one-way clutch unit and the shoulder) is opposite to the side where the moment load is applied. The diameter of the shoulder portion 34 of the inner ring 2 is larger.

  From this, the distance between the shoulder portions 31 and 34 of the inner and outer rings 1 and 2 on the side where the moment load is not applied to the plane P is the shoulder portion of the inner and outer rings 1 and 2 on the side where the moment load is applied to the plane P. It is larger than the distance between 30,33.

  The radial thickness of the annular portion 36 of the crown-shaped cage 15 is larger than the distance between the shoulder portion 30 of the outer ring 1 and the shoulder portion 33 of the inner ring 2 on the side where the moment load is applied to the plane P. The annular portion 36 of the crown-shaped cage 15 is disposed between the shoulder portion 31 of the outer ring 1 and the shoulder portion 34 of the inner ring 2 on the side where no moment load is assumed with respect to the plane P. Since the distance between the shoulder 31 of the outer ring 1 and the shoulder 34 of the inner ring 2 is large on the side where no moment load is applied to the plane P, the annular portion of the crown-shaped cage 15 is between the shoulders 31 and 34. 36 can be arranged.

  The seal member 26 includes a cored bar part 37 and an elastic part 38. One end of the seal member 26 is fixed to a recess formed at the end of the inner peripheral surface of the outer ring 1, and the seal lip 39 at the other end of the seal member 26 is the end of the outer peripheral surface of the inner ring 2. It is in sliding contact with a recess formed in the part.

  According to the one-way clutch unit of the first embodiment, the raceway grooves 8 and 11 are formed only on one side in the axial direction with respect to the inner periphery of the outer ring 1 and the engagement surface of the inner ring 2, and the shaft of the one-way clutch unit 20 is formed. Since the ball bearing portion 25 is formed only on one side in the direction, raceway grooves are formed on both sides in the axial direction of the inner ring of the outer ring and the engagement surface on the outer periphery of the inner ring, and ball bearing portions are formed on both sides in the axial direction of the one-way clutch unit. Compared with the conventional one-way clutch unit in which the one-way clutch unit is formed, the axial dimension of the one-way clutch unit can be remarkably reduced, and the parts such as the balls 4 arranged between the inner and outer rings 1 and 2 can be reduced. The number can be greatly reduced. Therefore, the size of the one-way clutch unit can be remarkably reduced, and the manufacturing cost of the one-way clutch unit can be greatly reduced.

  Further, according to the one-way clutch unit of the first embodiment, the ball 4 is disposed between the raceway grooves 8 and 11 of the inner and outer rings 1 and 2 so as to be adjacent to the one-way clutch portion 20. Since the portion 25 is formed, the ball bearing portion 25 can receive the load even if an excessive radial load is applied to the one-way clutch unit. Therefore, even in a situation where an excessive radial load is applied to the one-way clutch unit, the clutch operation of the one-way clutch unit can be performed stably.

  Further, according to the one-way clutch unit of the first embodiment, the wall thickness of the shoulder portion 33 on the outer side in the axial direction of the raceway groove 11 of the inner ring 2 where the ball 4 is likely to climb on the shoulder due to the moment load A is reduced. Since it is thicker than the wall pressure of the shoulder portion 34 on the other side of the groove 11, the one-way clutch unit can be prevented from wobbling in the radial direction, and the clutch operation of the one-way clutch portion can be performed stably. .

  Further, according to the one-way clutch unit of the first embodiment, the wall thickness of the shoulder portion 33 on the outer side in the axial direction of the raceway groove 11 of the inner ring 2 where the ball 4 is likely to climb on the shoulder due to the moment load A is reduced. Since the thickness of the shoulder portion 34 on the other side of the groove 11 is thicker, it is possible to effectively prevent the balls 4 from climbing on the shoulder. Therefore, damage (peeling etc.) of the raceway grooves 8 and 11 can be prevented, and the life of the deep groove ball bearing portion 25, that is, the life of the one-way clutch unit can be extended.

  Further, according to the one-way clutch unit of the first embodiment, the cage that holds the ball 4 is the crown-shaped cage 15, and the annular portion 36 of the crown-shaped cage 15 is connected to the shoulder of the outer ring 1 having a large distance. Since it is disposed between the portion 31 and the shoulder portion 34 of the inner ring 2, the radial thickness of the annular portion 36 of the crown-shaped cage 15 can be sufficiently secured, and the cage of the deep groove ball bearing portion 25 can be secured. Strength does not decrease.

  Further, according to the first embodiment, the raceway groove 8 of the outer ring 1, the raceway groove 11 of the inner ring 2, the crown cage 15 and the ball 4 constitute the deep groove ball bearing portion 25, and the deep groove as the ball bearing portion Since the ball bearing portion 25 is employed, a radial load and a moment load can be efficiently received with a simple structure.

  In the one-way clutch unit of the first embodiment, the deep groove ball bearing portion 25 is formed in the adjacent portion of the one-way clutch portion 20, but in the one-way clutch unit of the present invention, the one-way clutch portion 20 is adjacent. Instead of the deep groove ball bearing portion 25, a ball bearing portion other than the deep groove ball bearing portion 25, such as a four-point contact ball bearing portion, may be formed in the portion. When a four-point contact ball bearing portion is adopted as the ball bearing portion, a larger moment load can be handled.

  Further, in the one-way clutch unit of the first embodiment, a so-called inner cam type one-way clutch portion 20 having an engagement cam surface 10 on the inner ring 2 is employed. A so-called outer cam type one-way clutch portion having an engagement cam surface on the inner peripheral side may be employed. Moreover, you may employ | adopt the one-way clutch part by which the sprag was employ | adopted as an engaging element.

  In the one-way clutch unit of the first embodiment, the crown-shaped cage 15 is adopted as the cage for the ball bearing portion. However, in the one-way clutch unit of the present invention, two cages are used as the cage for the ball bearing portion. Of course, a cage of a type in which two annular portions are connected by a plurality of pillar portions spaced apart by a predetermined interval in the circumferential direction may be adopted.

(Second Embodiment)
FIG. 3 is a partially enlarged cross-sectional view of the deep groove ball bearing portion 75 of the one-way clutch unit according to the second embodiment of the present invention.

  The one-way clutch unit of the second embodiment has a structure that is different from the one-way clutch unit of the first embodiment only in the structure of the deep groove ball bearing portion. Therefore, the description of the one-way clutch portion is omitted, and only the deep groove ball bearing portion 75 is described. Further, in the one-way clutch unit of the second embodiment, the description of the configuration, operation effect, and modification common to the one-way clutch unit of the first embodiment will be omitted, and the one-way clutch unit of the first embodiment. Only configurations, operational effects, and modifications will be described.

  The deep groove ball bearing portion 75 has a radial load and an annular portion 86 side (one-way clutch portion side) of the crown-shaped cage 65 with respect to a plane Q including the center of the raceway groove 58 of the outer ring 51 and the raceway groove 61 of the inner ring 52. The moment load (offset load) indicated by the arrow B acting on is received.

  In the second embodiment, the thickness of the shoulder 83 of the inner ring 52 on the opposite side to the annular portion 86 side of the crown-shaped cage 65 with respect to the plane Q is defined as the annular portion of the crown-shaped cage 65 with respect to the plane Q. While the thickness of the shoulder portion 84 of the inner ring 52 on the 86 side is equal to the thickness of the shoulder portion 84 of the inner ring 52 on the 86 side, the thickness of the shoulder portion 80 of the outer ring 51 on the opposite side to the annular portion 86 side of the crown-shaped cage 65 is On the other hand, it is thicker than the thickness of the shoulder 81 of the outer ring 51 on the annular portion 86 side of the crown-shaped cage 65.

  According to the one-way clutch unit of the second embodiment, the shoulder 54 of the ball 54 can be prevented from climbing because the shoulder portion 80 of the outer ring 51 where the shoulder 54 of the ball 54 is likely to climb due to the moment load B is increased. Therefore, the moment load B can be reliably received, and the raceway grooves 58 and 61 can be reliably prevented from being damaged, and the bearing life of the one-way clutch unit can be extended.

  Further, according to the one-way clutch unit of the second embodiment, the annular portion 86 of the crown-shaped cage 65 is placed on the side where the moment load B is applied to the plane Q, that is, the shoulder portion 81 of the outer ring 51 having a large distance. And the shoulder portion 84 of the inner ring 52, the thickness of the annular portion 86 of the crown-shaped cage 65 can be sufficiently secured, and the strength of the crown-shaped cage 65 does not decrease.

  In the one-way clutch unit of the first and second embodiments, the annular portions 36 and 86 of the crown-shaped cages 15 and 65 are connected to the raceway grooves 8, 11, 58, Although it is arranged on the one-way clutch unit 20 side with respect to the planes P and Q passing through the center 61, in the one-way clutch unit of the present invention, the annular portion of the crown-shaped cage is the center of the raceway groove of the inner and outer rings. Of course, it may be arranged on the side opposite to the one-way clutch part side with respect to the plane passing through the.

  Although not shown, the annular part of the crown-shaped cage is disposed on the opposite side to the one-way clutch part side with respect to the plane passing through the center of the raceway groove of the inner and outer rings, and the moment load passes through the center. When the outer ring portion on the side opposite to the one-way clutch side is applied to the plane, by increasing the thickness of the shoulder portion on the one-way clutch portion side with respect to the plane of the outer ring, which is likely to ride on the shoulder of the ball, It is possible to obtain the same operational effects as in the above embodiment, such as preventing the ball from climbing over the shoulder.

  Further, the annular portion of the crown-shaped cage is disposed on the opposite side to the one-way clutch portion side with respect to the plane passing through the center of the raceway groove of the inner and outer rings, and the moment load is relative to the plane passing through the center. When the outer ring part on the one-way clutch side is applied, the shoulder of the ball is prevented from climbing by increasing the thickness of the shoulder part on the one-way clutch part side with respect to the plane of the inner ring where the ball is likely to climb on the shoulder. Thus, the same effects as those of the above embodiment can be obtained.

It is sectional drawing of the axial direction which shows the rough structure of the one way clutch unit of 1st Embodiment of this invention. It is a partial expanded sectional view which shows the detail of the deep groove ball bearing part of the one-way clutch unit of the said 1st Embodiment. It is a partial expanded sectional view of the deep groove ball bearing part of the one-way clutch unit of 2nd Embodiment of this invention.

DESCRIPTION OF SYMBOLS 1,51 Outer ring 2,52 Inner ring 3 Engagement roller 4,54 Ball 7 Cylindrical engagement surface 8,11,58,61 Track groove 10 Engagement cam surface 15,65 Crown-shaped cage 30,31,33,34, 80, 81, 83, 84 Shoulder 36, 86 Annulus

Claims (4)

An outer ring having an engagement surface and a raceway groove located only on one side in the axial direction with respect to the engagement surface on the inner periphery;
An inner ring having an engagement surface and a raceway groove located only on one side in the axial direction with respect to the engagement surface on the outer periphery;
An engagement element disposed between the engagement surface of the outer ring and the engagement surface of the inner ring;
A ball disposed between the raceway groove of the outer ring and the raceway groove of the inner ring,
In the outer ring or the inner ring, the diameter of the shoulder on one side of the raceway groove is different from the diameter of the shoulder on the other side, and between the shoulder of the outer ring and the shoulder of the inner ring on one side distances, much larger than the distance between the shoulder portion of the outer ring and the inner ring shoulder portion of the other side,
The one-way clutch unit , wherein the engagement element is located on the one side of the raceway groove . One-way clutch unit characterized by The one-way clutch unit according to claim 1,
A crown-shaped cage for holding the ball,
The one-way clutch unit characterized in that an annular portion of the crown-shaped cage is disposed between a shoulder portion of the outer ring on one side and a shoulder portion of the inner ring. The one-way clutch unit according to claim 2 ,
The one-way clutch unit characterized in that a radial thickness of the annular part of the crown type cage is larger than a distance between a shoulder part of the outer ring on the other side and a shoulder part of the inner ring. . The one-way clutch unit according to any one of claims 1 to 3 ,
The outer ring raceway groove, the inner raceway raceway groove and the ball constitute a part of a deep groove ball bearing part or a part of a four-point contact ball bearing part.

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