JP2021001641A - Roller bearing - Google Patents

Abstract

To provide a roller bearing that has a retainer with high stiffness and strength and has excellent handleability at maintenance service and the like and a large load capacity.SOLUTION: A roller bearing 10 includes a retainer 40 that includes: at least one of an outer diameter-side retainer component 51 with multiple outer diameter-side column parts 55 and an inner diameter-side retainer component 61 with multiple inner diameter-side column parts 65; and a pair of annular plates 41, 41 arranged on both sides in an axial direction of multiple rollers 35. At least one of the outer diameter-side retainer component 51 and the inner diameter-side retainer component 61 is fixed to the pair of annular plates 41, 41 by fixing means 77, 78.SELECTED DRAWING: Figure 6

Description

The present invention relates to roller bearings.

Conventionally, roller bearings with a large load capacity have been used in iron-making machines such as rolling mills, construction machines, mining machines, wind power generation equipment, and other machines and equipment that generate heavy loads, impact loads, vibrations, and rapid acceleration and deceleration. in use.

The roller bearing described in Patent Document 1 includes a pair of raceway wheels, a plurality of rollers interposed between the pair of raceway wheels, and a pair of annular plates arranged so as to sandwich the longitudinal direction of the rollers. A plurality of stays arranged in the circumferential direction to connect a pair of annular plates are provided. Then, a pin whose one end is fixed to the annular plate by welding is locked in a recess formed on the end face of the roller to rotatably support the roller. The stay is also joined to the annular plate by welding.

The cylindrical roller bearing described in Patent Document 2 has a cylindrical roller incorporated between an outer ring with a brim and an inner ring without a brim, and a cage for holding the cylindrical roller is positioned radially inward from the pitch circle of the cylindrical roller. The load capacity is increased by increasing the size of the rollers and increasing the number of rollers.

Utility Model Registration No. 2595876 Japanese Patent No. 6253877

However, the roller bearing described in FIG. 2 of Patent Document 1 has a cage structure in which a stay is inserted into a stay receiving hole of an annular plate and the stay and the annular plate are integrated by welding, although the cage has high rigidity and strength. Therefore, the wall thickness between the outer diameter of the annular plate and the stay receiving hole cannot be reduced, and the pitch circle diameter of the stays arranged between the adjacent rollers becomes relatively close to the pitch circle diameter of the rollers. .. Therefore, the space in which the rollers can be arranged is reduced by the space occupied by the stay, and many rollers cannot be arranged. Further, it is not preferable to move the stay closer to the outer peripheral surface side of the annular plate because the wall thickness on the outer peripheral surface side of the annular plate to which the stay is attached becomes thin.

Further, in the cylindrical roller bearing described in Patent Document 2, the cage is thin or thin, and the rigidity and strength of the cage are low. In particular, considering that the pillar of the cage is thin and the rollers come into contact with and collide with the pillar, there is a concern that the pillar may be damaged or damaged. Further, there is a problem that the cage cannot be taken out at the same time without using a jig, and the handleability at the time of maintenance is poor, and there is room for improvement.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a roller bearing having high rigidity and strength of a cage, excellent handleability at the time of maintenance, and a large load capacity. It is in.

The above object of the present invention is achieved by the following configuration.
(1) An outer ring having an outer ring raceway surface on the inner peripheral surface, an inner ring having an inner ring raceway surface on the outer peripheral surface, and a plurality of rollers rotatably arranged between the outer ring raceway surface and the inner ring raceway surface. A roller bearing including a cage that rotatably holds the plurality of rollers.
The cage is arranged on at least one of an outer diameter side cage component having a plurality of outer diameter side pillar portions and an inner diameter side cage component having a plurality of inner diameter side pillar portions, and both sides in the axial direction of the plurality of rollers. With a pair of annular parts,
A roller bearing, characterized in that at least one of the outer diameter side cage component and the inner diameter side cage component is fixed to the pair of annular portions by a fixing means.

According to the roller bearing of the present invention, the roller bearing can be a roller bearing having high rigidity and strength of the cage, excellent handleability at the time of maintenance and the like, and a large load capacity.

It is a perspective view of the roller bearing which concerns on 1st Embodiment of this invention. It is an exploded perspective view of the roller bearing shown in FIG. It is a partial side view of the roller bearing shown in FIG. It is sectional drawing in the axial middle part of the roller bearing shown in FIG. It is a perspective view of the cage shown in FIG. (A) is a WW sectional view of FIG. 3, and (b) is an XX sectional view of FIG. (A) is a YY cross-sectional view of FIG. 3, and (b) is a ZZ cross-sectional view of FIG. It is a figure corresponding to the YY cross section of FIG. 3 of the roller bearing which concerns on 2nd Embodiment. It is a figure corresponding to the YY cross section of FIG. 3 of the roller bearing which concerns on 3rd Embodiment. It is a figure corresponding to the YY cross section of FIG. 3 of the roller bearing which concerns on the modification of 3rd Embodiment. It is a figure corresponding to the YY cross section of FIG. 3 of the roller bearing which concerns on 4th Embodiment. It is a figure corresponding to the YY cross section of FIG. 3 of the roller bearing which concerns on the modification of 4th Embodiment. It is a figure corresponding to the YY cross section of FIG. 3 of the roller bearing which concerns on 5th Embodiment. It is a figure corresponding to the YY cross section of FIG. 3 of the roller bearing which concerns on the modification of 5th Embodiment. It is a figure corresponding to the YY cross section of FIG. 3 of the roller bearing which concerns on 6th Embodiment. It is a figure corresponding to the YY cross section of FIG. 3 of the roller bearing which concerns on the modification of 6th Embodiment. It is an enlarged sectional view of the main part in the axial middle part of the roller bearing which concerns on 7th Embodiment. It is a figure corresponding to the WW cross section of FIG. 3 of the roller bearing which concerns on 8th Embodiment. It is an enlarged sectional view of the roller and the stud of the roller bearing which concerns on 9th Embodiment. It is an enlarged sectional view of the roller and the stud of the roller bearing which concerns on 10th Embodiment. It is an enlarged sectional view of the roller and the stud of the roller bearing which concerns on 11th Embodiment. It is an enlarged sectional view of the roller and the stud of the roller bearing which concerns on 1st modification of 11th Embodiment. FIG. 5 is an enlarged cross-sectional view of rollers and studs of a roller bearing according to a second modification of the eleventh embodiment.

Hereinafter, roller bearings according to each embodiment of the present invention will be described in detail with reference to the drawings.

(First Embodiment)
First, the roller bearing according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 7.
As shown in FIGS. 1 to 7, the roller bearing 10 of the present embodiment includes an outer ring 20 with a brim having an outer ring raceway surface 21 formed on the inner peripheral surface, and a brim ring 23 fixed to the outer ring 20. A brimless inner ring 30 having an inner ring raceway surface 31 formed on the outer peripheral surface, a plurality of rollers 35 rotatably arranged between the outer ring raceway surface 21 and the inner ring raceway surface 31, and a plurality of rollers 35 are rotated. A cylindrical roller bearing including a cage 40 that freely supports the bearing 40.

In particular, with reference to FIG. 6A, the outer ring 20 has a brim portion 22 protruding toward the inner diameter side of the outer ring raceway surface 21 at one end in the axial direction with respect to the outer ring raceway surface 21. Further, the brim ring 23 is fixed to the other end of the outer ring 20 in the axial direction by a fixing means (hexagon socket head bolt or the like) 25, and projects toward the inner diameter side of the outer ring raceway surface 21 to form the brim portion 24.
On the other hand, the inner ring 30 has an outer peripheral surface having substantially the same diameter as the outer diameter of the inner ring raceway surface 31 over the entire axial direction, and is formed in a cylindrical shape.

The rollers 35 are formed in a cylindrical shape, and a pair of bottomed holes 36, 36 passing through the axial center L of the rollers 35 are concentrically formed on both side surfaces in the axial direction.

As shown in FIG. 5, the cage 40 includes a pair of annular plates 41, 41 forming a pair of left and right annular portions arranged on both sides in the axial direction of the plurality of rollers 35, and a pair of annular plates 41, 41. A plurality of studs 70 mounted at predetermined intervals in the circumferential direction and a pair of annular plates 41 and 41, each of which is fixed to a substantially annular outer diameter side cage component 51 and an inner diameter side cage component. A stud-shaped cage comprising 61.

As shown in FIG. 6A, a plurality of female threaded portions 42 penetrating in the axial direction are formed on the pair of annular plates 41 and 41. Then, each stud 70 is attached to the pair of annular plates 41 and 41 by screwing the male screw portion 46 formed on the body portion 71 of the stud 70 into each female screw portion 42. The head 72 of the stud 70 has a diameter larger than that of the body 71, and in a state where the male thread portion 46 of the body portion 71 is screwed into the female thread portion 42, the head 72 protrudes from the axial inner side surface of the pair of annular plates 41 and 41. A shaft portion that fits with the hole portion 36 of the roller 35 is formed. Therefore, in the state where the cage 40 is assembled, each roller 35 is rotatably supported by the pair of annular plates 41 and 41 by fitting the holes 36 of the head 72 and 35 of the stud 70. ..

The outer diameter side cage component 51 is divided into a semicircular first outer diameter side cage component 51A and a second outer diameter side cage component 51B having the same shape as each other. The first and second outer diameter side cage parts 51A and 51B are arranged so as to face each other in the circumferential direction, and are fixed to the outer peripheral surfaces of the annular plates 41 and 41 by fixing means, respectively. It has 54 and a plurality of outer diameter side pillar portions 55 that are arranged at predetermined intervals in the circumferential direction and connect a pair of outer diameter side annular portions 54, 54 in the axial direction. As shown in FIGS. 7A and 7B, the inner peripheral surfaces of the outer diameter side ring portions 54, 54 are formed to have a larger diameter than the inner peripheral surface of the outer diameter side pillar portion 55, and are formed on the outer diameter side. A step portion 59 is formed at a boundary position between the radial side ring portions 54 and 54 and the outer diameter side pillar portion 55. As a result, when the outer diameter side annular portions 54, 54 of the first and second outer diameter side cage parts 51A, 51B are fixed to the pair of annular plates 41, 41 by fixing means, the first and second outer diameter side cage parts 51A, 51B, respectively. The outer diameter side cage parts 51A and 51B and the pair of annular plates 41 and 41 are relatively positioned in the axial direction.

Further, the inner diameter side cage component 61 is fitted to the inner peripheral surfaces of the annular plates 41 and 41 by press fitting, and is fixed to a pair of inner diameter side annular portions 64 and 64 by fixing means, and predetermined in the circumferential direction. It has a plurality of inner diameter side pillar portions 65 which are arranged at intervals and connect a pair of inner diameter side ring portions 64, 64 in the axial direction. The plurality of inner diameter side pillar portions 65 are provided in the same number as the plurality of outer diameter side pillar portions 55. The outer peripheral surface of the inner diameter side ring portions 64, 64 is formed to have a smaller diameter than the outer peripheral surface of the inner diameter side pillar portion 65, and is located at the boundary position between the inner diameter side ring portions 64, 64 and the inner diameter side pillar portion 65. , Step 69 is formed. As a result, when the pair of annular plates 41 and 41 are press-fitted into the inner diameter side annular portions 64 and 64 of the inner diameter side cage component 61 and fixed by the fixing means, the pair is paired with the inner diameter side cage component 61. The annular plates 41, 41 of the above are relatively positioned in the axial direction.

Further, as shown in FIG. 7B, the first and second outer diameter side cage parts 51A and 51B and the annular plates 41 and 41 are positioned parts in the plurality of key grooves 56 and 43 formed respectively. By inserting each of the keys 75, the phases are determined in the circumferential direction. Further, as shown in FIG. 6B, from the outer diameter side of each radial hole 57 formed in the outer diameter side annular portions 54, 54 of the first and second outer diameter side cage parts 51A, 51B. By attaching each fixing means (hexagonal hole bolt, etc.) 77 to each radial female thread portion 45 of the annular plates 41, 41, the first and second outer diameter side cage parts 51A, 51B, and the annular plates 41, 41 Are fixed to each other.

Further, as shown in FIG. 7A, the inner diameter side cage component 61 and the annular plates 41 and 41 are respectively formed by inserting the keys 76, which are positioning components, into the plurality of key grooves 66 and 44 formed therein. Then, the phases are determined in the circumferential direction of each other. Then, as shown in FIG. 6B, each radial female screw of the annular plate 41, 41 from the inner diameter side of each radial hole 67 formed in the inner diameter side annular portion 64, 64 of the inner diameter side cage component 61. By attaching each fixing means (hexagonal hole bolt or the like) 78 to the portion 45, the inner diameter side cage component 61 and the annular plates 41 and 41 are fixed to each other.

As a result, as shown in FIG. 4, each outer diameter side pillar portion 55 and each inner diameter side pillar portion 65 are arranged in the same phase. Further, as shown in FIG. 5, the cage 40 is a pair of inner diameter side ring portions 64, 64, a pair of annular plates 41, 41, and an outer diameter side cage component 51 of the inner diameter side cage component 61. The pocket 60 for accommodating the rollers 35 is provided by the inner side surfaces of the outer diameter side ring portions 54, 54 in the axial direction, the adjacent outer diameter side pillar portions 55, 55, and the adjacent inner diameter side pillar portions 65, 65. Form.

The step portions 59 and 69 for positioning in the axial direction are the boundary positions between the outer diameter side ring portions 54 and 54 and the outer diameter side pillar portion 55, and the inner diameter side ring portions 64 and 64 and the inner diameter side pillar portion. It is formed at the boundary position with 65. Therefore, the inner side surfaces of the inner diameter side annular portion 64 of the inner diameter side cage component 61, the annular plate 41, and the outer diameter side annular portion 54 of the outer diameter side cage component 51 are formed flush with each other. To.

Further, as shown in FIG. 7B, the cage 40 is composed of a pair of annular plates 41, 41, an outer diameter side cage component 51, and an inner diameter side cage component 61 on a cut surface along the radial direction. Since it has a hollow rectangular shape, the cage 40 is configured to have high rigidity, while adjacent rollers 35 can be arranged close to each other in the circumferential direction.
Further, each outer diameter side pillar portion 55 of the outer diameter side cage component 51 and each inner diameter side pillar portion 65 of the inner diameter side cage component 61 are located at positions separated from the pitch circle of the roller 35 on the outer diameter side and the inner diameter side, respectively. Therefore, even when the adjacent rollers 35 are arranged close to each other in the circumferential direction, it is possible to prevent the rollers 35 from interfering with the rollers 35.
Further, as shown in FIG. 4, the axial cross-sectional shape of the outer diameter side pillar portion 55 is formed into a substantially trapezoidal shape in which the width gradually narrows from the outer diameter side toward the inner diameter side, and the shaft of the inner diameter side pillar portion 65. The directional cross-sectional shape is formed into a substantially trapezoidal shape in which the width gradually narrows from the inner diameter side to the outer diameter side. Therefore, even when the rollers 35 are arranged close to each other, the axial cross-sectional shape of the outer diameter side pillar portion 55 and the inner diameter side pillar portion 65 can be set large, and the rigidity of the cage 40 can be increased. Can be done.

Next, the procedure for assembling the roller bearing 10 will be described.
As an outline of the procedure, after assembling the plurality of rollers 35 and the cage 40 integrally so that the plurality of rollers 35 are not separated from the cage 40, parts other than the cage 40 are assembled, and the rollers are assembled. The bearing 10 is completed. First, the male threaded portions 46 of the body portions 71 of the plurality of studs 70 are screwed and fixed to the female threaded portions 42 of the pair of annular plates 41 and 41.

Since the diameter of the head 72 of the stud 70 is larger than the diameter of the body portion 71 (male screw portion 46), the annular plate 41 is press-fitted into the inner diameter side annular portion 64 when the stud 70 is assembled to the annular plate 41. It will be done before. An adhesive such as Loctite can be used to prevent the male threaded portion 46 and the female threaded portion 42 from loosening (rotating). Further, if a fine screw or an extra fine screw is used for the screw portion, loosening is less likely to occur.

Next, each roller 35 is arranged between the adjacent inner diameter side pillars 65 and 65 of the inner diameter side cage component 61, and each roller 35 is prevented from falling off from the inner diameter side cage 61 by using a jig (not shown). .. After that, the key of the inner diameter side cage component 61 is fitted so that the head portion 72 of each stud 70 protruding from the one annular plate 41 is fitted into the hole portion 36 formed on one axial side surface of each roller 35. With the key 76 inserted in the groove 66, the annular plate 41 is press-fitted into the outer peripheral surface of one inner diameter side annular portion 64 of the inner diameter side cage component 61 until it comes into contact with the step portion 69.

Next, as shown in FIG. 7A, the keys 76 are formed from the outer diameter side of the annular plate 41 in a state where the key grooves 44 and 66 formed in the annular plate 41 and the inner diameter side cage component 61 are in phase with each other. Is inserted into the keyways 44 and 66. After that, as shown in FIG. 6B, fixing means (from the inner diameter side of the radial hole 67 formed in the inner diameter side annular portion 64 of the inner diameter side cage component 61 to the radial female screw portion 45 of the annular plate 41 ( By attaching a hexagon socket head bolt or the like) 78, one annular plate 41 and the inner diameter side cage component 61 are fixed to each other.

Further, in the same manner, the other annular plate 41 and the inner diameter side cage component 61 are fixed, and the head 72 of each stud 70 formed on the other annular plate 41 is formed on the other axial side surface of each roller 35. Fits into the hole 36 formed in.

Next, as shown in FIG. 7B, a semicircular first outer diameter side cage component 51A and a second outer diameter side cage component 51B are provided on the outer peripheral surfaces of the pair of annular plates 41 from the outside in the radial direction. It is fitted according to the step portion 59. At that time, a pair of key grooves 56 formed in the first and second outer diameter side cage parts 51A and 51B are inserted into the key 75 previously inserted into the key groove 43 formed in the annular plate 41. The first and second outer diameter side cage parts 51A and 51B are phase-determined with respect to the annular plates 41 and 41 of the above. After that, as shown in FIG. 6B, the radial female thread portion of the annular plate 41 from the outer diameter side of the radial hole 57 formed in the outer diameter side annular portion 54 of the outer diameter side cage parts 51A and 51B. By attaching the fixing means (hexagonal bolt or the like) 77 to the 45, the pair of annular plates 41 and 41 and the outer diameter side cage parts 51A and 51B are fixed to each other.

In this way, the inner ring 30 is axially inserted into the plurality of rollers 35 which are rotatably supported by the stud 70 and are not separated from the cage 40, and further, the outside of the plurality of rollers 35. The outer ring 20 with a brim is inserted from the side without the brim 22. Then, the brim ring 23 formed separately is fixed to the side surface of the brim outer ring 20 by the fixing means (hexagon socket head bolt or the like) 25, and the roller bearing 10 is assembled.

As described above, according to the roller bearing 10 of the present embodiment, since the plurality of rollers 35 are rotatably supported by the studs 70 of the cage 40, the adjacent rollers 35 do not come into contact with each other. Since they can be arranged close to each other, the number of rollers can be increased and the load capacity of the roller bearing 10 can be increased. Further, the roller 35 does not interfere with the outer diameter side pillar portion 55 and the inner diameter side pillar portion 65 of the stud type cage 40, and the roller 35, the outer diameter side pillar portion 55, and the inner diameter side pillar portion 65 may be damaged or damaged. There is no. Therefore, for example, it can be used under severe usage conditions where heavy load, impact load, vibration, rapid acceleration / deceleration, etc. occur, such as rolling roll support in a steelmaking machine.
Further, since the cage 40 is assembled with the outer diameter side cage component 51 and the inner diameter side cage component 61, the rigidity is high, and further, from the outer ring 20 and the inner ring 30, the cage 40 and 35 Can be taken out at the same time without using a jig, and is easy to handle during maintenance.
Further, since the cage 40 can be assembled by fixing means (hexagon socket head cap screw or the like) 77,78, the cage 40 is excellent in assembling property as compared with the case of assembling by welding.

(Second Embodiment)
Next, the roller bearing of the second embodiment will be described with reference to FIG.
In the second to eleventh embodiments described below, the parts different from the roller bearings of the first embodiment will be mainly described, and the same reference numerals will be given to the parts common to the roller bearings of the first embodiment. The explanation will be omitted or simplified. Further, FIGS. 8 to 16 of the second embodiment to the sixth embodiment are views corresponding to the YY cross section in FIG.

Similar to the first embodiment, the cage 40A of the roller bearing 10 of the present embodiment includes an outer diameter side cage component 51, a pair of annular plates 41, 41, and an inner diameter side cage component 61. On the other hand, in the present embodiment, as in the first embodiment, instead of providing the step portions 59 and 69 on the inner peripheral surface of the outer diameter side cage component 51 and the outer peripheral surface of the inner diameter side cage component 61, each annular shape is provided. The step portions 81 and 82 are formed by projecting the outer peripheral surface and the inner peripheral surface of the axial end portion of the plate 41 in a flange shape, respectively.
Therefore, the pair of annular plates 41, 41 protrude in the axial direction from the outer diameter side pillar portion 55 of the outer diameter side cage component 51 and the inner diameter side pillar portion 65 of the inner diameter side cage component 61.

In this case, the pair of annular plates 41, 41 are press-fitted into the outer peripheral surface of the inner diameter side cage component 61 until the step portion 82 abuts on the axial end surface of the inner diameter side cage component 61 at the time of assembly. Further, the first and second outer diameter side cage parts 51A and 51B are fitted so that their axial end faces are aligned with the stepped portion 81 of the annular plate 41. As a result, the axial positions of the outer diameter side cage component 51, the pair of annular plates 41, 41, and the inner diameter side cage component 61 are positioned respectively.
Other configurations and operations are the same as those of the first embodiment.

The step portions 81 and 82 provided on each annular plate 41 of the present embodiment, and the step portions 59 and 69 provided on the outer diameter side cage component 51 and the inner diameter side cage component 61 of the first embodiment. Can be combined with each other. That is, the outer diameter side cage component 51 and the annular plate 41 are positioned in the axial direction using the stepped portion 81 provided on the annular plate 41, and the annular plate 41 and the inner diameter side cage component 61 are positioned as the inner diameter side cage component. The step portion 69 provided in the 61 may be used for axial positioning. Alternatively, the outer diameter side cage component 51 and the annular plate 41 are positioned in the axial direction using the step portion 59 provided on the outer diameter side cage component 51, and the annular plate 41 and the inner diameter side cage component 61 are annularly positioned. The step portion 82 provided on the plate 41 may be used for axial positioning.

(Third Embodiment)
Next, the roller bearing of the third embodiment will be described with reference to FIG.
As shown in FIG. 9, the cage 40B of the roller bearing 10 of the present embodiment includes an outer diameter side cage component 51 including a pair of annular portions 41A and 41A, and an inner diameter side cage component 61. That is, the outer diameter side annular portions 54, 54 of the outer diameter side cage component 51 and the pair of annular portions 41A, 41A are integrally and continuously formed. In this case, specifically, the pair of annular portions 41A and 41A are also divided into two, and are integrally integrated with the outer diameter side annular portions 54 and 54 of the first and second outer diameter side cage parts 51A and 51B, respectively. It is formed.

Further, on the outer peripheral surface of the inner diameter side cage component 61, a step portion 69 is formed at a boundary position between the inner diameter side ring portions 64 and 64 and the inner diameter side pillar portion 65. Therefore, when the inner side surfaces of the pair of annular portions 41A and 41A in the axial direction come into contact with the step portion 69, the outer diameter side cage component 51 and the inner diameter side cage component 61 are positioned axially with each other. Then, the pair of annular portions 41A and 41A of the outer diameter side cage component 51 and the inner diameter side cage component 61 are phased to each other in the circumferential direction by a key, and each bolt 78 (see FIG. 6B). Is fixed by.

Further, in the present embodiment, the pair of studs forming the shaft portion attached to the pair of annular portions 41A and 41A have, for example, the outer diameter of the head portion 72 as shown in the eleventh embodiment described later. The one with a smaller diameter is applied. In this case, the pair of studs is assembled from the axially outer side of the pair of annular portions 41A and 41A after each roller 35, the outer diameter side cage component 51, and the inner diameter side cage component 61 are assembled. ..
Other configurations and operations are the same as those of the first embodiment.

In the present embodiment, the axial positioning of the outer diameter side cage component 51 and the inner diameter side cage component 61 is performed by the step portion 69 formed on the outer peripheral surface of the inner diameter side cage component 61. , Like the cage 40C of the modified example shown in FIG. 10, the step portion 82 formed on the inner peripheral surface of the axial end portions of the pair of annular portions 41A and 41A may be used. That is, the outer diameter side cage component 51 (specifically, the first one) is caused by the axial outer surface of the inner diameter side cage component 61 coming into contact with the step portions 82 formed on the pair of annular portions 41A and 41A. The second outer diameter side cage parts 51A and 51B) and the inner diameter side cage component 61 may be positioned axially with each other.

(Fourth Embodiment)
Next, the roller bearing of the fourth embodiment will be described with reference to FIG.
As shown in FIG. 11, the cage 40D of the roller bearing 10 of the present embodiment includes an outer diameter side cage component 51 and an inner diameter side cage component 61 including a pair of annular portions 41A and 41A. That is, the inner diameter side annular portions 64, 64 of the inner diameter side cage component 61 and the pair of annular portions 41A, 41A are integrally formed. In this case as well, specifically, the outer diameter side cage component 51 is divided into two parts, the first and second outer diameter side cage parts 51A and 51B.

Further, on the inner peripheral surface of the outer diameter side cage component 51, a step portion 59 is formed at a boundary position between the outer diameter side annular portions 54 and 54 and the outer diameter side pillar portion 55. Therefore, when the inner side surfaces of the pair of annular portions 41A and 41A in the axial direction abut on the step portion 59, the outer diameter side cage component 51 and the inner diameter side cage component 61 are positioned axially with each other. Then, the pair of annular portions 41A and 41A of the outer diameter side cage component 51 and the inner diameter side cage component 61 are phase-determined with each other in the circumferential direction by a key, and each bolt 77 (see FIG. 6B). Is fixed by.

Further, also in this case, as the pair of studs 70 constituting the shaft portions attached to the pair of annular portions 41A and 41A, the ones shown in the eleventh embodiment described later are applied as in the third embodiment.
Other configurations and operations are the same as those of the first embodiment.

Further, in the present embodiment, the axial positioning of the outer diameter side cage component 51 and the inner diameter side cage component 61 is performed by the step portion 59 formed on the inner peripheral surface of the outer diameter side cage component 51. However, it may be performed by the stepped portion 81 formed on the outer peripheral surface of the axial end portion of the pair of annular portions 41A and 41A, as in the cage 40E of the modified example shown in FIG. That is, when the axially outer surface of the outer diameter side cage component 51 abuts on the stepped portion 81 formed on the pair of annular portions 41A and 41A, the outer diameter side cage component 51 (specifically, the first The 1st and 2nd outer diameter side cage parts 51A and 51B) and the inner diameter side cage part 61 may be positioned axially with each other.

(Fifth Embodiment)
Next, the roller bearing of the fifth embodiment will be described with reference to FIG.
As shown in FIG. 13, the cage 40F of the roller bearing 10 of the present embodiment is composed of a pair of annular plates 41 and 41 and an inner diameter side cage component 61. That is, the cage 40F does not have the outer diameter side cage component 51 as compared with the cage 40 of the first embodiment.

Further, on the outer peripheral surface of the inner diameter side cage component 61, a step portion 69 is formed at a boundary position between the inner diameter side ring portions 64 and 64 and the inner diameter side pillar portion 65. Therefore, the pair of annular plates 41, 41 are press-fitted into the inner diameter side cage component 61 until the axial inner side surfaces of the pair of annular plates 41, 41 abut on the step portion 69, whereby the pair of annular plates 41, The 41 and the inner diameter side cage component 61 are positioned axially with each other. Then, the pair of annular plates 41, 41 and the inner diameter side cage component 61 are phased to each other in the circumferential direction by a key, and are fixed by a fixing means (hexagon socket head cap screw, etc.) 78 (see FIG. 6B). Will be done.
Such a cage 40F of the present embodiment can be adopted in an application that does not require as high rigidity as the cage 40 of the first embodiment, and the manufacturing cost can be reduced.
Other configurations and operations are the same as those of the first embodiment.

In the present embodiment, the axial positioning of the pair of annular plates 41, 41 and the inner diameter side cage component 61 is performed by the step portion 69 formed on the outer peripheral surface of the inner diameter side cage component 61. , Like the cage 40G of the modified example shown in FIG. 14, the step portion 82 formed on the inner peripheral surface of the axial end portion of the pair of annular plates 41 and 41 may be used.

(Sixth Embodiment)
Next, the roller bearing of the sixth embodiment will be described with reference to FIG.
As shown in FIG. 15, the cage 40H of the roller bearing 10 of the present embodiment is composed of a pair of annular plates 41 and 41 and an outer diameter side cage component 51. That is, the cage 40H does not have the inner diameter side cage component 61 as compared with the cage 40 of the first embodiment.

Further, on the inner peripheral surface of the outer diameter side cage component 51, a step portion 59 is formed at a boundary position between the outer diameter side annular portions 54 and 54 and the outer diameter side pillar portion 55. Therefore, the pair of annular plates 41, 41 are press-fitted into the outer diameter side cage component 51 until the axial outer surfaces of the pair of annular plates 41, 41 come into contact with the step portion 59, whereby the pair of annular plates 41 , 41 and the outer diameter side cage component 51 are positioned axially with each other. Then, the pair of annular plates 41, 41 and the outer diameter side cage component 51 are phased to each other in the circumferential direction by a key, and are fixed by a fixing means (hexagon socket head bolt or the like) 77 (see FIG. 6B). It is fixed.
Such a cage 40H of the present embodiment can be adopted in an application that does not require as high rigidity as the cage 40 of the first embodiment, and the manufacturing cost can be reduced.
Other configurations and operations are the same as those of the first embodiment. However, the outer diameter side cage component 51 of the present embodiment may be composed of the first and second outer diameter side cage parts 51A and 51B, but may be composed of a single component.

Further, in the present embodiment, the axial positioning of the outer diameter side cage component 51 and the pair of annular plates 41, 41 is performed by the step portion 59 formed on the inner peripheral surface of the outer diameter side cage component 51. However, it may be performed by the stepped portion 81 formed on the outer peripheral surface of the axial end portion of the pair of annular plates 41, 41 as in the cage 40I of the modified example shown in FIG.

(7th Embodiment)
Next, the roller bearing of the seventh embodiment will be described with reference to FIG.
As shown in FIG. 17, the cage 40J of the roller bearing 10 of the present embodiment has the outer diameter side pillar portion 55 of the outer diameter side cage component 51 of the first embodiment and the inner diameter side of the inner diameter side cage component 61. The cross-sectional shape of the pillar portion 65 is formed in a rectangular shape. The cage 40J has a slightly lower rigidity than the cage 40 of the first embodiment, but the outer diameter side pillar portion 55 and the inner diameter side pillar portion 65 can be easily machined.
Therefore, the cage 40J can be used in applications that do not require the rigidity of the cage 40 of the first embodiment, and the manufacturing cost can be reduced.
Other configurations and operations are the same as those of the first embodiment.

(8th Embodiment)
Next, the roller bearing of the eighth embodiment will be described with reference to FIG.
As shown in FIG. 18, in the present embodiment, a pair of support shafts 37, which are shaft portions formed at the axis center L of the roller 35A, are provided on both side surfaces of a cylindrical portion constituting the rolling surface of the roller 35A. It has a smaller diameter than the cylindrical part and is integrally formed by protruding in the axial direction. On the other hand, in the cage 40K, the roller support holes 62, which are holes for rotatably fitting the support shafts 37, are formed in the pair of annular plates 41 and 41.
Therefore, also in the present embodiment, since the support shaft 37 is fitted in the roller support hole 62 of the annular plate 41 and is rotatably supported by the cage 40, the plurality of rollers 35A have the adjacent rollers 35A. , Can be placed close together without contacting each other. Further, in the present embodiment, since the stud is unnecessary, the manufacturing cost can be suppressed.
Other configurations and operations are the same as those of the first embodiment. The configuration of the present embodiment is also applicable to the roller bearings of the second to seventh embodiments.

(9th Embodiment)
Next, the roller bearing of the ninth embodiment will be described with reference to FIG. 19 to 23 of FIGS. 19 to 23 of the ninth embodiment to the eleventh embodiment described below are enlarged sectional views of a main part corresponding to the WW cross section in FIG.

As shown in FIG. 19, in the cage 40L of the present embodiment, as in the first embodiment, the stud 70 has a head portion 72 having a large diameter and a body portion 71 having a small diameter, while the body portion 71 has a male screw portion. It is a configuration that does not have 46. In the stud 70 of the present embodiment, the body portion 71 is press-fitted into the stud holding hole 47 having no female threaded portion of the annular plate 41, and is fixed by a fixing pin 79 which is a fixing means from a direction orthogonal to the central axis of the stud 70. There is. Also in this embodiment, the stud 70 is assembled to the annular plate 41 until the annular plate 41 is press-fitted into the inner diameter side annular portion 64. Further, when the fixing pin is used as the fixing means, the stud 70 is also positioned in the axial direction, so that the diameters of the heads of the large-diameter head 72 and the small-diameter body 71 may be the same.
In addition to the fixing pin 79, the fixing means may be a set screw or the like. Further, although the hole through which the fixing pin 79 is inserted is formed to penetrate the annular plate 41 and the body portion 71, it does not have to penetrate.
Other configurations and operations are the same as those of the first embodiment.

(10th Embodiment)
Next, the roller bearing of the tenth embodiment will be described with reference to FIG.
As shown in FIG. 20, in the cage 40M of the present embodiment, as in the first embodiment, the stud 70 has a head portion 72 having a large diameter and a body portion 71 having a small diameter, while the body portion 71 has a male screw portion. It is a configuration that does not have 46. In the stud 70 of the present embodiment, the body portion 71 is press-fitted into the stud holding hole 47 having no female threaded portion of the annular plate 41, and the body portion 71 is fixed to the annular plate 41 by welding as a fixing means. Also in this embodiment, the stud 70 is assembled to the annular plate 41 before the annular plate 41 is press-fitted into the inner diameter side annular portion 64.
Other configurations and operations are the same as those of the first embodiment.

(11th Embodiment)
Next, the roller bearing of the eleventh embodiment will be described with reference to FIG.
As shown in FIG. 21, in the cage 40N of the present embodiment, the stud 70A has a head portion 72 having a smaller diameter and a body portion 71 having a diameter larger than that of the head portion 72 as compared with that of the first embodiment. , And a flange portion 73 for axially positioning the stud 70A. However, also in this embodiment, the male screw portion 46 is formed on the body portion 71. Further, the annular plate 41 is formed with a female screw portion 42 that can be screwed with the male screw portion 46 of the body portion 71.
Therefore, the stud 70A can be inserted from the side opposite to the roller 35 (the axially outer side of the cage 40N), and is assembled by screwing the male threaded portion 46 of the body portion 71 into the female threaded portion 42 of the annular plate 41. .. As described above, such a stud 70A is preferably used in the cages 40B to 40E of the third and fourth embodiments.
As with the roller bearing 10 of the first embodiment, an adhesive such as Loctite can be used to prevent the screw portion from loosening (rotation prevention).

In addition, like the cage 40O of the first modification shown in FIG. 22, the stud 70A may be fixed to the annular plate 41 by using the fixing pin 79 as in the ninth embodiment. That is, in the stud 70A, the body 71 is press-fitted into the stud holding hole 47 of the annular plate 41 from the opposite side of the roller 35, and the body 71 is a fixing pin which is a fixing means from the direction orthogonal to the central axis of the stud 70. It may be fixed to the annular plate 41 by 79. Further, when the fixing pin 79 is used as the fixing means, the stud 70A is also positioned in the axial direction, so that the diameters of the head 72 and the body 71 may be the same as those of the head 72.

Alternatively, as in the cage 40P of the second modification shown in FIG. 23, in the stud 70A, the body portion 71 of the stud 70A is the stud holding hole 47 of the annular plate 41 from the opposite side of the roller 35, as in the tenth embodiment. The flange portion 73 may be fixed to the annular plate 41 by welding.

The present invention is not limited to the above-described embodiments, and can be appropriately modified, improved, and the like.
For example, the guide method of the cage may be any of an outer ring guide method, a roller guide method, and an inner ring guide method.
Further, the inner ring may be an inner ring with a brim having a brim portion or a brim ring. Further, although the outer diameter side cage component has been described as being divided into two parts, any of the inner diameter side cage component and the annular portion can be divided into a plurality of parts if there is no problem in assembly.
Further, the number of keys 75, 76 and fixing means (bolts, etc.) 77, 78, which are positioning parts, can be appropriately selected. For example, a positioning part may not be provided, or another positioning part may be used. Some pins, reamer bolts, etc. may be used.

As described above, the following matters are disclosed in this specification.
(1) An outer ring having an outer ring raceway surface on the inner peripheral surface, an inner ring having an inner ring raceway surface on the outer peripheral surface, and a plurality of rollers rotatably arranged between the outer ring raceway surface and the inner ring raceway surface. A roller bearing including a cage that rotatably holds the plurality of rollers.
The cage is arranged on at least one of an outer diameter side cage component having a plurality of outer diameter side pillar portions and an inner diameter side cage component having a plurality of inner diameter side pillar portions, and both sides in the axial direction of the plurality of rollers. With a pair of annular parts,
A roller bearing, characterized in that at least one of the outer diameter side cage component and the inner diameter side cage component is fixed to the pair of annular portions by a fixing means.
According to this configuration, since the pair of annular portions are axially connected by the outer diameter side pillar portion and the inner diameter side pillar portion, a cage having high rigidity can be obtained. Further, since at least one of the outer diameter side cage part and the inner diameter side cage part is fixed to the pair of annular portions by the fixing means, it is easier to assemble than the case where the cage is assembled by welding. Become. Further, since the rollers are integrally assembled together with the cage, the rollers and the cage can be taken out at the same time without using a jig, and the handling during maintenance is high.

(2) The cage includes the outer diameter side cage component, the inner diameter side cage component, and a pair of annular portions.
The cage has a hollow rectangular shape composed of the pair of annular portions, the outer diameter side cage component, and the inner diameter side cage component on a cut surface along the radial direction, and the plurality of cages. In the roller, the shaft portion or the hole portion formed at the center of the shaft on both side surfaces thereof is fitted with the hole portion formed in the pair of annular portions or the shaft portion attached to the pair of annular portions. The roller bearing according to (1), wherein the roller is rotatably supported and does not come into contact with the outer diameter side pillar portion and the inner diameter side pillar portion.
According to this configuration, since the pair of annular portions are axially connected by the outer diameter side pillar portion and the inner diameter side pillar portion, the rigidity and strength of the cage are improved. Further, adjacent rollers can be arranged close to each other, and the load capacity of the roller bearing is improved by increasing the number of rollers. Further, since the rollers are rotatably supported by the studs attached to the annular portion, the load-bearing capacity is increased.

(3) The fixing means of the cage is incorporated into the annular portion from the inner diameter side of the inner diameter side cage component or the outer diameter side of the outer diameter side cage component (1). Or the roller bearing according to (2).
According to this configuration, the inner diameter side cage component, the outer diameter side cage component, and the annular portion can be easily fixed, and the assembling property is good.

(4) The description according to any one of (1) to (3), wherein at least one of the outer diameter side cage component and the inner diameter side cage component is divided into a plurality of parts in the circumferential direction. Roller bearing.
According to this configuration, even outer diameter side cage parts and inner diameter side cage parts that are difficult to assemble when integrally formed can be easily assembled by dividing them into a plurality of parts, and the cage can be easily assembled. improves.

(5) In the cage, the shaft portion provided in the annular portion is formed of a stud, and the stud fits into the hole portion formed in the roller to rotatably support the roller. The roller bearing according to any one of (1) to (4), which is a stud type cage.
According to this configuration, the rollers and the rollers do not come into contact with the cage, and there is less concern about damage or breakage of the cage as compared with bearings in which the rollers come into contact with each other. Further, the rollers can be arranged close to each other to increase the number of rollers, and the load capacity is improved.

(6) The roller bearing according to (5), wherein the body of the stud is fixed to a stud holding hole formed in the annular portion by a fixing means.
According to this configuration, the stud is firmly fixed to the annular portion by the fixing means, so that the load capacity of the roller bearing is increased.

10 Roller bearing 20 Outer ring 21 Outer ring raceway surface 30 Inner ring 31 Inner ring raceway surface 35, 35A Roller 36 Hole 37 Support shaft (shaft)
40, 40A-40P Stud type cage (retainer)
41 Ring plate (annular part)
41A Circular ring portion 46 Male threaded portion (fixing means)
47 Stud holding holes 51, 51A, 51B Outer diameter side cage parts 55 Outer diameter side pillars 61 Inner diameter side cage parts 62 Roller support holes (holes)
65 Inner diameter side pillar 70,70A Stud 71 Body 75,76 Key 77,78 Bolt (fixing means)
79 Fixing pin (fixing means)

Claims (6)

An outer ring having an outer ring raceway surface on the inner peripheral surface, an inner ring having an inner ring raceway surface on the outer peripheral surface, a plurality of rollers rotatably arranged between the outer ring raceway surface and the inner ring raceway surface, and the plurality of rollers. A roller bearing equipped with a cage that rotatably holds the rollers.
The cage is arranged on at least one of an outer diameter side cage component having a plurality of outer diameter side pillar portions and an inner diameter side cage component having a plurality of inner diameter side pillar portions, and both sides in the axial direction of the plurality of rollers. With a pair of annular parts,
A roller bearing, characterized in that at least one of the outer diameter side cage component and the inner diameter side cage component is fixed to the pair of annular portions by a fixing means. The cage includes the outer diameter side cage component, the inner diameter side cage component, and a pair of annular portions.
The cage has a hollow rectangular shape composed of the pair of annular portions, the outer diameter side cage component, and the inner diameter side cage component on a cut surface along the radial direction.
In the plurality of rollers, the shaft portion or the hole portion formed at the center of the shaft on both side surfaces thereof is the hole portion formed in the pair of annular portions or the shaft portion attached to the pair of annular portions, respectively. The roller bearing according to claim 1, wherein the roller is rotatably supported by fitting and does not come into contact with the outer diameter side pillar portion and the inner diameter side pillar portion. According to claim 1 or 2, the fixing means of the cage is incorporated into the annular portion from the inner diameter side of the inner diameter side cage component or the outer diameter side of the outer diameter side cage component. The roller bearings described. The roller bearing according to any one of claims 1 to 3, wherein at least one of the outer diameter side cage component and the inner diameter side cage component is divided into a plurality of parts in the circumferential direction. The cage has a stud shape in which the shaft portion provided in the annular portion is formed of a stud, and the stud fits into the hole portion formed in the roller to rotatably support the roller. The roller bearing according to any one of claims 1 to 4, wherein the roller bearing is a cage. The roller bearing according to claim 5, wherein the stud has a body portion fixed to a stud holding hole formed in the annular portion by a fixing means.

Images