JP2011043214A - Angular bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an angular bearing that is hard to disassemble by an external force, without increasing costs. <P>SOLUTION: On at least one of the opposite faces out of opposite faces of an inner ring 1 and an outer ring 2, raceway surfaces 1a, 2a are extended to positions P1, P2 or positions proximal thereto that cross a straight line L2 passing through the center of a ball, the straight line being perpendicular to the axis O of the bearing. A plane 2b that further continues from a continuing end thereof is provided. A latching section 5b provided at a retainer 5 is latched to the outside of the raceway surface 2a formed to continue with the plane 2b. When a force that separates both raceway surfaces 1a, 2a from each other along the axis of the bearing is exerted on the inner ring 1 or the outer ring 2, the force is transmitted to the inner ring 1 and the outer ring 2 via the retainer 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an angular bearing.

  Conventionally, as a bearing capable of receiving an axial load, there is an angular bearing having a contact angle θ not 0 ° as shown in FIG. In such an angular bearing, the ball 3 held by the retainer 4 is interposed between the inner ring 1 and the outer ring 2, but on the opposing rolling surfaces 1 a and 2 a on the straight line L <b> 1 forming the contact angle. Both opposing surfaces of the inner ring 1 and the outer ring 2 are formed so that the balls 3 come into contact with each other. That is, it is necessary to form the rolling surfaces 1a and 2a that come into contact with the ball 3 at positions that are biased to one side with respect to the straight line L2 that passes through the center of the ball 3 perpendicular to the axis O. In order to make it possible to assemble the inner and outer rings 1 and 2 provided with 1a and 2a and the ball 3, the distance between the inner ring 1 and the outer ring 2 is widened at least on one end side in the axial direction.

JP 2002-180202 A

In the angular bearing, as shown in FIG. 12, one end side in the axial direction is provided so that the inner and outer rings 1, 2 provided with the rolling surfaces 1a, 2a facing each other on the straight line L1 forming the contact angle can be assembled. The distance d between the inner and outer rings 1 and 2 is increased toward. Therefore, when the force F in the direction of the arrow shown in the figure acts on the inner ring 1, the inner ring 1 may come off from the outer ring 2. The same applies when a force in the direction opposite to the force F acts on the outer ring 2.
As described above, the axial force that separates the rolling surfaces 1a and 2a between the inner ring 1 and the outer ring 2 does not cause a problem when the angular bearing is assembled to a device or the like and used as a bearing. However, when the angular bearing is stored separately as a part, the above force may be a force for disassembling the bearing. For example, when vibrations become intense during transportation in a vehicle or when the vehicle falls from a shelf during storage, an external force acts on the bearing, and the inner ring 1 comes out in the direction of the arrow in FIG. It may end up. If the inner ring 1 is disengaged, the retainer 4 is also disengaged, the balls 3 are disjointed, and the bearing is disassembled.

In order to prevent such disassembly, it is conceivable to wrap individual angular bearings so that both axial ends are pressed tightly. If individual packaging is performed in this way, the angular bearing will not be disassembled even if an external force due to dropping or the like acts. However, if the bearings, which are device parts, are packed exactly one by one, the packaging cost will be increased, and it will be necessary to take out the individually packed bearings when assembling the device. This also reduces workability.
An object of the present invention is to provide an angular bearing that is not easily disassembled by an external force without causing an increase in cost.

  According to a first aspect of the present invention, a ball held by a retainer is interposed between opposed surfaces of an inner ring and an outer ring, and each of the pair of opposed surfaces has an arcuate shape opposed on a line forming a preset contact angle. In an angular bearing in which a rolling surface is formed and the ball is held and rotated between the both rolling surfaces, the rolling surface is a line perpendicular to the axis of the bearing on at least one opposing surface. Continue to the position that intersects with or near the straight line that passes through the center of the ball, and has a plane that continues further from this continuous end, on the outside of the rolling surface that is formed continuously with the plane of the inner ring or outer ring, When a force is applied to the inner ring or the outer ring, the force is transmitted to the inner ring and the outer ring via the retainer when a force that moves the both rolling surfaces in the axial direction of the bearing is applied to the inner ring or the outer ring. , Characterized in that to prevent the both rolling surfaces are relatively moved in the axial direction.

  For the transmission of the force described above, “when the force that separates both rolling surfaces in the axial direction of the bearing acts on the inner ring or the outer ring, the force is transmitted to the inner ring and the outer ring via the retainer”. Includes those in which the retainer directly transmits the force by contacting the inner ring and the outer ring, and those in which the retainer transmits the force by interposing not only the retainer but also other members.

  The second invention is based on the first invention, and one of the pair of rolling surfaces is made continuous with an arc-shaped holding concave surface for holding the ball, while the holding concave surface is made continuous. The retaining portion of the retainer is stopped outside the other rolling surface facing the other rolling surface, and the retainer on the opposite side of the retaining portion is stopped by a ball.

  3rd invention presupposes the said 1st invention, The position which cross | intersects each said rolling surface to the straight line which passes along the center of a ball | bowl which is orthogonal to the axis line of the said bearing on a pair of said opposing surface. Alternatively, it is continued to the vicinity, and further provided with a flat surface extending from the continuous end. The retainer is provided with a pair of latching portions, and these latching portions are stopped outside the rolling surfaces facing each other with the ball interposed therebetween. It is characterized by that.

Note that the position where the continuous end of the rolling surface is located, a line perpendicular to the axis of the bearing and intersecting with a straight line passing through the center of the ball, or a position in the vicinity thereof is a position intersecting with a straight line passing through the center of the ball Or, if the rolling surface continues beyond the position where it intersects the straight line, the ball will get over the continuous end of the rolling surface when there is no retainer latching part. It is a position that becomes a protrusion to the extent that can be.
Further, the plane continuous from the continuous end is a plane provided on the outer periphery of the inner ring or the inner periphery of the outer ring and is not a plane, but is a plane in which a cross section by a plane including the central axis of the bearing is a straight line. is there.

  The fourth invention is characterized in that the retainer includes a first member and a second member that holds the ball in cooperation with the first member.

  According to the first to fourth inventions, only by improving the shape of the retainer, which is an originally required member for the angular bearing, an external force that causes the pair of rolling surfaces to separate in the axial direction is applied to the inner ring or the outer ring in the component state. Even if it acts, a structure that does not easily disassemble can be realized. Accordingly, in order to prevent the bearing from being disassembled, it is possible to prevent the bearing from being disassembled without incurring costs for individual packaging for pressing the axial end.

  In the second invention, when a force that separates the pair of rolling surfaces is applied, the force is transmitted from the retainer to the ball, and further transmitted from the ball to the arc-shaped holding concave surface continuous to the one rolling surface. The axial relative movement of the pair of rolling surfaces can be restricted.

  In the third invention, the force is directly transmitted to the inner ring and the outer ring through a pair of latching portions provided on the retainer. The retainer can prevent the pair of rolling surfaces from relatively moving in the axial direction.

  According to the fourth aspect of the invention, by dividing the retainer, it is possible to assemble the retainer having the latching portions on both sides of the ball, and the retainer can prevent the angular bearing from being disassembled.

1 is a cross-sectional view of an angular bearing of a first embodiment. (A) is a front view of the retainer of 1st Embodiment, (b) is the IIb-IIb sectional view taken on the line of (a). It is sectional drawing of the angular bearing of 2nd Embodiment. (A) is a front view of the retainer of 2nd Embodiment, (b) is the IVb-IVb sectional view taken on the line of (a). It is sectional drawing of the angular bearing of 3rd Embodiment. It is a figure which shows the assembly process of 3rd Embodiment. It is a figure which shows the assembly process of 3rd Embodiment, Comprising: The post process of the process shown in FIG. 6 is shown. It is the elements on larger scale of 3rd Embodiment. It is sectional drawing of the angular bearing of 4th Embodiment. It is a figure which shows the assembly process of 4th Embodiment. It is a figure which shows the assembly process of 4th Embodiment, Comprising: The process after the process shown in FIG. 10 is shown. It is sectional drawing of the conventional angular bearing.

The first embodiment shown in FIGS. 1 and 2 is an angular bearing in which a plurality of balls 3 are interposed between opposing surfaces of an inner ring 1 and an outer ring 2. The balls 3 are arranged on the outer circumference of the inner ring 1 at a predetermined interval by a retainer 5 described later.
The angular bearing of the first embodiment is opposed to a facing surface between the inner ring 1 and the outer ring 2 on a straight line L1 that intersects with a straight line L2 that is perpendicular to the axis O of the bearing and passes through the center of the ball 3 to form a contact angle. Arc-shaped rolling surfaces 1a and 2a are provided. The rolling surfaces 1a and 2a support the load of the angular bearing.

  The facing surface on the inner ring 1 side is provided with an arc-shaped holding concave surface 1b that continues from the continuous end to the intersection surface P1 with the straight line L2 and continues from the continuous end to the rolling surface 1a. The holding concave surface 1b is a concave surface for holding the ball 3. In the first embodiment, the holding concave surface 1b has the same shape as the rolling surface 1a. However, the holding concave surface 1b may be any shape as long as the ball 3 does not fall off due to the axial force. The curvature and cross-sectional shape are not particularly limited.

On the other hand, on the facing surface on the outer ring 2 side, the rolling surface 2a facing the rolling surface 1a on the straight line L1 forming the contact angle is continued to the intersection P2 with the straight line L2, and at the continuous end thereof. A continuous plane 2b is provided. Strictly speaking, the plane 2b is not a plane because it is the inner peripheral surface of the outer ring 2, but a plane that is a straight line in this sectional view is a plane with respect to the arc surface. In the first embodiment, the plane 2b is a plane parallel to the axis O of the bearing.
Further, the outer ring 2 is formed with a latching surface 2c outside the rolling surface 2a formed continuously with the plane of the present invention.

The retainer 5 for holding the plurality of balls 3 has a shape shown in FIGS. 2A and 2B, and has a cylinder having an inner diameter larger than the outer diameter of the inner ring 1 and an outer diameter smaller than the inner diameter of the outer ring 2. It consists of a portion 5a and a flange-like latching portion 5b.
A plurality of arc-shaped holding recesses 5c for holding the balls 3 are formed in the cylindrical portion 5a. The holding recess 5c has its arc substantially matched with the outer diameter of the ball 3, but the recess depth from the opening is larger than the radius of the ball 3 and smaller than the diameter. For this reason, the opening width of the holding recess becomes smaller than the diameter of the ball, and the ball 3 inserted into the holding recess 5c is prevented from passing through the opening.

The angular bearing of the first embodiment shown in FIG. 1 includes a retainer 5 that holds a ball 3 between the inner ring 1 and the outer ring 2, and the assembly is performed as follows.
First, the inner ring 1 is inserted into the center of the outer ring 2. Next, the inner ring 1 and the outer ring 2 are eccentric, and all the balls 3 are inserted from the portion where the gap between them is large. When all the balls 3 are inserted, the retainer 5 is inserted between the inner ring 1 and the outer ring 2. At that time, the retaining portion 5b of the retainer 5 is positioned on the retaining surface 2c side of the outer ring 2, and the ball 3 is fitted into each holding recess 5c of the cylindrical portion 5a while adjusting the position of the ball 3. Push in.

In the angular bearing shown in FIG. 1 thus completed, the latching portion 5 b of the retainer 5 is fastened to the latching surface 2 c of the outer ring 2.
For this reason, the angular bearing is prevented from moving and not disassembled when a force is applied to the pair of rolling surfaces 1a and 2a formed on the inner ring 1 and the outer ring 2 in the axial direction.
The force in the direction in which the pair of rolling surfaces 1a and 2a are separated from each other in the axial direction is a direction in which the inner ring 1 moves in the direction indicated by the arrow with respect to the outer ring 2.
If the force F in the direction of the arrow acts on the inner ring 1, the force is transmitted to the ball 3 via the holding concave surface 1 b of the inner ring 1. That is, a force in the direction of the arrow acts on the ball 3.

  Further, since the ball 3 is held by the holding recess 5 c of the retainer 5 and is integrated with the retainer 5, the force is transmitted to the retainer 5 via the ball 3. Further, the force acting on the retainer 5 acts on the retaining surface 2c of the outer ring 2 via the retaining recess 5c of the retainer 5 and the flange-shaped retaining portion 5b. In this way, forces in the same direction act on the inner ring 1 and the outer ring 2. Therefore, it is possible to prevent the inner ring 1 and the outer ring 2 from moving in the direction away from each other in the axial direction.

Further, since the movements of the inner and outer rings 1 and 2 are relative, it is considered that when the outer ring 2 is separated from the inner ring 1, a force in the direction opposite to the arrow acts on the outer ring 2. In that case, it is the same that only the force transmission is reversed and the relative movement is prevented. That is, a force in the direction opposite to the arrow in FIG. 1 is transmitted from the outer ring 2 through the retaining portion 5b to the retainer 5 → the ball 3 → the holding concave surface 1b → the inner ring 1.
In addition, the relative movement in the direction in which the pair of rolling surfaces 1a and 2a approach is a movement that does not occur originally because the ball 3 is interposed between the rolling surfaces 1a and 2a.

As described above, the retainer 5 that holds the position of the ball 3 in the axial direction is provided with the latching portion 5b, and is fastened to the latching surface 2c located outside the rolling surface 2a of the outer ring 2. This angular bearing can prevent the inner ring 1 from being detached from the outer ring 2 even when an external force in the axial direction is applied. Therefore, even if the angular bearing as a part is not specially packaged, it will not be disassembled.
In the first embodiment, the rolling surface 2a provided on the opposing surface of the outer ring 2 is continuous with the plane 2b with the intersection P2 with the straight line L2 as a continuous end. However, the continuous end is the intersection P2 with the intersection P2. Or the vicinity may be sufficient. And the position of the continuous end when the rolling surface 2a continues beyond the said intersection P2 is a position which becomes a protrusion which the ball 3 can get over, if there is no latching part 5b of the retainer 5. is there.

  In this embodiment, the plane 2b continuous to the rolling surface 2a is parallel to the bearing axis O. However, the plane 2b may not be parallel to the axis O. However, the flat surface 2b must have a constant or large distance from the facing surface on the inner ring 1 side toward the end of the outer ring 2 from the continuous end of the rolling surface 2a. This is because if the flat surface 2b reduces the distance from the facing surface of the inner ring 1 from the continuous end of the rolling surface 2a toward the end surface of the outer ring 2, the ball 3 can be incorporated between the inner and outer rings 1 and 2. It will be impossible.

In the second embodiment shown in FIGS. 3 and 4, the shape of the opposed surfaces of the inner ring 1 and the outer ring 2 is opposite to that of the first embodiment, and the latching portion 5 d of the retainer 5 is formed on the rolling surface 1 a of the inner ring 1. It is an angular bearing that can be stopped outside.
The same reference numerals as those in the first embodiment are used for the same components as those in the first embodiment.
Below, it demonstrates centering on the point which is different from 1st Embodiment.
In the second embodiment, a flat surface 1c continuous to the rolling surface 1a is provided on the facing surface on the inner ring 1 side, and a latching surface 1d is provided outside the rolling surface 1a. That is, the rolling surface 1a is a rolling surface formed continuously with the flat surface 1c of the present invention, and the latching surface 1d is outside the rolling surface.
Further, on the facing surface on the outer ring 2 side, there are provided a rolling surface 2a facing the rolling surface 1a and a holding concave surface 2d continuous thereto. The holding concave surface 2d is a concave surface for holding the ball 3 in the same manner as the holding concave surface 1b provided on the inner ring 1 of the first embodiment.

Further, the retainer 5 of the second embodiment includes a latching portion 5d that protrudes toward the inner diameter side of the cylindrical portion 5b, instead of the latching portion 5b of the retainer 5 of the first embodiment shown in FIG. Other than that is the same as the retainer 5 of 1st Embodiment, and the cylinder part 5a is equipped with the holding | maintenance recessed part 5c for hold | maintaining the ball | bowl 3. FIG.
The latching portion 5d is stopped on the latching surface 1d of the inner ring 1.
The angular bearing of the second embodiment also transmits an external force in the axial direction to the inner ring 1 and the outer ring 2 through the latching portion 5d and the holding concave surface 2d of the retainer 5, and can prevent both from separating in the axial direction.
Specifically, when the force F in the direction of the arrow shown in FIG. 3 is applied to the inner ring 1, the force is applied to the latching surface 1d of the inner ring 1 → the latching part 5d of the retainer 5 → the holding recess 5c → the ball 3 → The holding concave surface 2d of the outer ring 2 is transmitted to the outer ring 2.

The third embodiment shown in FIGS. 5 to 8 is characterized in that the retainer 5 is composed of two members 5A and 5B, and is otherwise the same as the first embodiment. The shapes and dimensions of individual members are different from those in the first embodiment, but the same reference numerals as those in the first embodiment are used for elements having similar functions.
That is, the inner ring 1 includes a rolling surface 1 a and a holding concave surface 1 b continuous with the rolling surface 1 a on the surface facing the outer ring 2.
On the other hand, the opposing surface of the outer ring 2 is provided with a rolling surface 2 a that faces the rolling surface 1 a and a flat surface 2 b that continues from the rolling surface 2 a to the end of the outer ring 2. Moreover, the outer ring | wheel 2 has provided the latching surface 2c in the outer side of the said rolling surface 2a.
A ball 3 is interposed between the rolling surfaces 1a and 2a.

Further, the retainer 5 for holding the position of the ball 3 is composed of a first member 5A and a second member 5B as shown in FIGS.
The first member 5A includes a cylindrical part 5a having an inner diameter larger than the outer diameter of the inner ring 1 and an outer diameter smaller than the inner diameter of the outer ring 2, and a flange-shaped latching part 5b at one end of the cylindrical part 5a. A U-shaped holding recess 5c for holding the ball is provided at the end opposite to the stopper 5b. While the opening width of the holding recess 5c is substantially equal to the diameter of the ball 3, a connecting projection 5e is projected in the axial direction between the openings.

The second member 5B includes a cylindrical portion 5f having an inner and outer diameter equal to the cylindrical portion 5a of the first member 5A (see FIGS. 5 and 7). A connecting recess 5g into which the connecting projection 5e is fitted is provided on the end surface of the cylindrical portion 5f at a position corresponding to the connecting protrusion 5e provided on the cylindrical portion 5a. When the connecting protrusion 5e is fitted in the connecting recess 5g, both the members 5A and 5B are connected and the both members are not easily detached.
Note that the cylindrical portion 5a of the first member 5A and the cylindrical portion 5f of the second member 5B do not necessarily have the same inner and outer diameters. Both cylinder parts 5a and 6f should just be a dimension which can be inserted between the inner ring | wheel 1 and the outer ring | wheel 2, and can provide the said connection protrusion 5e and the connection recessed part 5g in a corresponding position.

The procedure for assembling the angular bearing of the third embodiment with the members as described above is shown in FIGS.
First, as shown in FIG. 6, the inner ring 1 is inserted inside the outer ring 2, and the balls 3 are inserted from a portion having a large gap in a state where they are eccentric.
When all the balls 3 are inserted between the inner ring 1 and the outer ring 2, the cylindrical portion 5a of the first member 5A of the retainer 5 is placed between the inner and outer rings 1 and 2 as shown in FIG. Insert from the side.
When inserting the first member 5 </ b> A of the retainer 5, the ball 3 is placed in each holding recess 5 c while rolling in the circumferential direction between the inner and outer rings 1, 2. If all the balls 3 enter the holding recesses 5c, the latching portions 5b of the first member 5A can be brought into contact with the latching surfaces 2c of the outer ring 2, as shown in FIG.

Next, in a state where the latching portion 5b of the retainer 5 is pressed against the latching surface 2c of the outer ring 2, the second member 5B is inserted between the inner and outer rings 1 and 2 and is inserted into the connecting recess 5g of the first member 5B. The connecting protrusion 5e of the first member 5A is fitted. Thus, the first member 5A and the second member 5B are connected, and the ball 3 is held by the retainer 5 as shown in FIG.
Also in the angular bearing of the third embodiment, as shown in FIG. 5, the latching portion 5b of the retainer 5 is stopped by the latching surface 2c located outside the rolling surface 2a of the outer ring 2, When a force that separates the rolling surfaces 1a and 2a in the axial direction acts on the inner ring 1 or the outer ring 2, the force is applied to the retaining ring 5b, the ball 3, and the holding concave surface 1b as in the first embodiment. Thus, it can be transmitted to the inner ring 1 and the outer ring 2. Therefore, even if the force which separates both rolling surfaces 1a and 2a in an axial direction acts, relative movement of both rolling surfaces 1a and 2a can be prevented, and as a result, the angular bearing can be prevented from being disassembled.

In the third embodiment, the retainer 5 is constituted by two members 5A and 5B, and the ball 3 is surrounded by both members, so that the ball 3 can be held more reliably. Therefore, transmission of force via the ball 3 is ensured.
The connection method between the first member 5A and the second member 5B is not limited to the fitting as described above, and may be any method such as welding or adhesion with a medicine.

Furthermore, in this 3rd Embodiment, although the 1st member of the retainer 5 is provided with the flange-shaped latching | locking part 5b for stopping on the latching surface 2c of the outer ring | wheel 2, like the said 2nd Embodiment, The retainer 5 provided with the latching portion 5d to be stopped on the inner ring 1 side may be constituted by two members. In this case, the first member 5A includes a latching portion 5d that protrudes inward from the cylindrical portion 5a, and constitutes the retainer 5 together with the second member 5B of the third embodiment shown in FIG. The inner ring 1 is required to have the latching surface 1d of the second embodiment shown in FIG.
Furthermore, in the third embodiment, a U-shaped holding recess 5c having a recess depth equal to or larger than the diameter of the ball 3 is formed in the first member 5A, and no holding recess is formed in the second member 5B. However, a holding recess may be formed in both the first and second members A and B. For example, the connecting portion of the first member 5A and the second member 5B is made to correspond to the position where the ball 3 is divided into two, and a semicircular holding recess is formed in both the members 5A and 5B, thereby holding the ball 3 You may make it do.

In the angular bearing of the fourth embodiment shown in FIGS. 9 to 11, the retainer 5 includes first and second members 5 </ b> A and 5 </ b> B and a pair of latching portions 5 b and 5 d. The latching portions 5b and 5d are fixed to the latching surface 2c of the outer ring 2 and the latching surface 1d of the inner ring 1, respectively.
The inner ring 1 of the fourth embodiment is the same as the inner ring 1 of the second embodiment shown in FIG. 3, and is a line orthogonal to the axis O of the bearing on the surface facing the outer ring 2. A rolling surface 1a that continues to or near the position P1 that intersects the straight line L2 that passes through the center, and a plane 1c that continues from the rolling surface 1a to the end surface of the inner ring 1 are provided. A stop surface 1d is provided.

  On the other hand, the outer ring 2 is the same as the outer ring 2 of the first embodiment shown in FIG. 1, and intersects a straight line L <b> 2 that is perpendicular to the axis O of the bearing and passes through the center of the ball 3 on the opposite surface. A rolling surface 2a that continues to or near position P2 and faces the rolling surface 1a, and a flat surface 2b that continues from the rolling surface 2a to the end surface of the outer ring 2 are provided on the outside of the rolling surface 2a. Is provided with a latching surface 2c.

The retainer 5 of the fourth embodiment is structured to be connected to the first member 5A and the second member 5B.
As shown in FIG. 10, the first member 5 </ b> A includes a flange-shaped latching portion 5 b at one end of a cylindrical portion 5 a having an inner diameter larger than the outer diameter of the inner ring 1 and an outer diameter smaller than the inner diameter of the outer ring 2. Yes. In order to hold the ball 3 in the cylindrical portion 5a, a plurality of semicircular holding concave portions 5c that substantially coincide with the outer periphery of the ball are provided, and a connecting projection 5e protrudes between the openings.

  Further, the second member 5B is composed of a cylindrical portion 5f shown in FIG. 11, and a latching portion 5d is protruded inward from one end face of the cylindrical portion 5f. Further, a semicircular holding recess 5h for holding the ball 3 is provided at a position corresponding to the holding recess 5c of the first member 5A on the end surface of the cylinder portion 5f opposite to the latching portion 5d. ing. Further, a connecting recess 5g is provided between the opening of the holding recess 5h and at a position corresponding to the connecting protrusion 5e.

The procedure for assembling the angular bearing of the fourth embodiment will be described with reference to FIGS.
First, as shown in FIG. 10, the first member 5A of the retainer 5 is inserted inside the outer ring 2, and the ball 3 is inserted into each holding recess 5c. Since the holding recess 5c of the first member 5A is semicircular and has an opening corresponding to the diameter of the ball 3, a force for pushing the ball 3 is not required when the holding recess 5c holds the ball 3.
When all the balls 3 are held in the holding recesses 5c and aligned on the circumference, the inner ring 1 is inserted into the first member 5A from the plane 1c side as shown in FIG.
When the inner ring 1 is inserted, the ball 3 held by the holding recess 5c is positioned between the inner ring 1 and the outer ring 2 as shown in FIG.

Next, the cylindrical portion 5f of the second member 5B of the retainer 5 is inserted between the inner and outer rings 1 and 2, and the connection protrusion 5e of the first member 5A is fitted into the connection recess 5g of the second member 5B. Thereby, the first member 5A and the second member 5B are connected, and the ball 3 is held in a circle formed by the holding recess 5c and the holding recess 5g.
When the first member 5A and the second member 5B are connected, the latching portion 5b of the first member 5A is latched to the latching surface 2c of the outer ring 2, and the latching portion 5d of the second member 5B is It is assumed that the axial lengths of the cylindrical portions 5a and 5f of the members 5A and 5B are managed so as to be stopped by the latching portion 1d of the inner ring 1.

In this way, the pair of latching portions 5b, 5d provided on both sides of the retainer 5 are respectively latched by the latching surfaces 2c, 1d of the outer ring 2 and the inner ring 1, so that both rolling surfaces 1a, 2a are axially arranged. When a separating force is applied, the force can be transmitted to the inner ring 1 and the outer ring 2 via the latching part 5b and the latching part 5d.
Therefore, even if the force which separates both rolling surfaces 1a and 2a in an axial direction acts, relative movement of both rolling surfaces 1a and 2a can be prevented, and as a result, the angular bearing can be prevented from being disassembled.

In the fourth embodiment, since the retainer 5 is provided with the pair of latching portions 5b and 5d, the force for separating the pair of rolling surfaces 1a and 2a from the retainer 5 alone is applied to the inner ring 1 and the outer ring 2. Can communicate. That is, it is not necessary to pass the ball 3 to transmit the force.
However, also in the fourth embodiment, since the ball 3 is surrounded by the first and second members 5A and 5B, the ball 3 can be held more reliably.
Further, the connection method between the first member 5A and the second member 5B is not limited to the above-described fitting, and any method such as welding or adhesion with a medicine may be used.

In the fourth embodiment, the connecting portion of the first member 5A and the second member 5B is made to correspond to the position where the ball 3 is divided into two, and the semicircular holding recesses 5c and 5g are formed on both members. However, the connecting portion may be at any position between the pair of latching portions 5b and 5d, and the holding recess may not be provided in both the members 5A and 5B. For example, a U-shaped holding recess may be formed in the first member 5A, and a holding recess may not be formed in the second member 5B. In that case, the ball 3 is held as shown in FIG. Or you may form a U-shaped holding | maintenance recessed part only in the 2nd member 5B.

Furthermore, the opening width of the holding recesses 5c and 5h is not particularly limited. However, if the opening width is equal to or larger than the diameter of the ball 3, the insertion of the ball 3 is facilitated.
In the fourth embodiment, since the force for separating the pair of rolling surfaces is transmitted only through the retainer 5, the force transmitted to the retainer 5 may not be transmitted to the ball 3. For this reason, the holding recess may have a shape in which the ball 3 slightly fluctuates inside.

DESCRIPTION OF SYMBOLS 1 Inner ring 1a Rolling surface 1b Holding concave surface 1c Flat surface 1d Latching surface 2 Outer ring 2a Rolling surface 2b Flat surface 2c Latching surface 2d Holding concave surface 3 Ball 5 Retainer 5b Latching portion 5d Latching portion 5A First member 5B Second member 5e Connecting protrusion 5g Connecting recess
O Axis L1 (Create contact angle) Straight line L2 Straight line

Claims (4)

  A ball held by a retainer is interposed between the opposing surfaces of the inner ring and the outer ring, and each of the pair of opposing surfaces is formed with an arcuate rolling surface that is opposed on a line forming a preset contact angle. In the angular bearing that holds and rotates the ball between the rolling surfaces, at least one of the opposing surfaces has a rolling surface that is a line perpendicular to the axis of the bearing and passing through the center of the ball. A retaining portion provided on the retainer on the outside of the rolling surface formed continuously with the plane of the inner ring or the outer ring. When the force that separates both rolling surfaces in the axial direction of the bearing is applied to the inner ring or the outer ring, the force is transmitted to the inner ring and the outer ring via the retainer. Angular bearing but to prevent relative movement in the axial direction.   Of the pair of rolling surfaces, one rolling surface has an arc-shaped holding concave surface that holds the ball continuous, and the other rolling surface that faces the one rolling surface that has the holding concave surface continuous. The angular bearing according to claim 1, wherein a retaining portion of the retainer is fixed to the outside of the retainer, and a retainer on a side opposite to the retaining portion is fixed to the ball.   Each of the rolling surfaces is connected to the pair of opposing surfaces to a position that is a line orthogonal to the axis of the bearing and intersects with a straight line passing through the center of the ball or the vicinity thereof, and a plane that is further continuous from the continuous end. 2. The angular bearing according to claim 1, wherein the retainer is provided with a pair of latching portions, and the latching portions are stopped outside the rolling surfaces facing each other with the ball interposed therebetween.   The angular bearing according to claim 1, wherein the retainer includes a first member and a second member that holds the ball in cooperation with the first member.

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