JP2010071321A - Tapered roller bearing - Google Patents

Abstract

Provided is a tapered roller bearing that can reduce the stirring resistance of lubricating oil in the bearing and reduce the rotational torque of the bearing.
A tapered roller bearing 200 includes an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, and an outer ring raceway surface 11a and an inner ring raceway surface 12a. A plurality of tapered rollers 13 disposed so as to be capable of rolling, and a cage 10 that holds the plurality of tapered rollers 13 at substantially equal intervals in the circumferential direction, and the cage 10 has a small-diameter-side annular portion 15. And an inner diameter side column portion 17 and an outer diameter side column portion 18 projecting from the inner diameter side and the outer diameter side at substantially equal intervals in the circumferential direction on the axial end face of the small diameter side annular portion 15. This is a die cage, and the inner diameter side column portion 17 is formed along the small flange portion 12b of the inner ring 12 and the inner ring raceway surface 12a.
[Selection] Figure 1

Description

  The present invention relates to a tapered roller bearing, and relates to, for example, a tapered roller bearing used for a general industrial machine such as a railway vehicle, a steel machine, a machine tool, and a construction machine, and a rotation support part such as a deceleration part of an automobile.

  Tapered roller bearings are widely used because they are compact, can support large radial loads and axial loads, and can be used at high speeds.

  A conventional tapered roller bearing includes a plurality of outer rings having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of rolls between the outer ring raceway surface and the inner ring raceway surface. And a retainer for holding a plurality of tapered rollers at substantially equal intervals in the circumferential direction.

  The cage connects the large-diameter side annular portion, the small-diameter-side annular portion coaxially arranged with the large-diameter-side annular portion, and the large-diameter-side annular portion and the small-diameter-side annular portion. And a plurality of column portions arranged at substantially equal intervals, and a pocket portion formed between the column portions adjacent to each other in the circumferential direction to hold the tapered rollers in a rollable manner.

  By the way, in the tapered roller bearing, in addition to the frictional resistance between the tapered roller and the outer ring and the inner ring, lubrication that flows from the small-diameter side end of the inner ring and is discharged from the large-diameter side end as a cause of the generation of rotational torque. There is a stirring resistance in the oil bearing. It is preferable to reduce the rotational torque as much as possible from the viewpoint of energy saving. For this reason, various techniques for reducing the stirring resistance of the lubricating oil have been proposed for the purpose of reducing the rotational torque of the bearing (for example, Patent Document 1). -3)).

  The tapered roller bearing described in Patent Document 1 adjusts the gap between the inner ring side and the bent portion of the smaller diameter end of the cage to the inner ring side, thereby reducing the inflow amount of lubricating oil into the bearing. The stirring resistance of the lubricating oil in the bearing is reduced.

  Further, the tapered roller bearing described in Patent Document 2 includes a gap between the inner ring side and the bent portion of the cage on the small diameter side end portion, and a bent portion on the inner ring side of the cage on the large diameter side end portion. The gap between the inner ring and the inner ring is adjusted to suppress the amount of lubricating oil flowing into the bearing, thereby reducing the stirring resistance of the lubricating oil.

  Further, in the tapered roller bearing described in Patent Document 3, the area of the annular opening between the outer ring and the inner ring on the lubricating oil inflow side is smaller than the area outside the cage in the area inside the cage. In addition, lubricating oil outflow promoting means is provided between the inner and outer rings or near the large diameter side of the tapered roller to reduce the amount of lubricating oil staying in the bearing, thereby reducing the stirring resistance of the lubricating oil.

JP-A-11-2011149 Japanese Patent Laid-Open No. 10-89353 JP 2005-265113 A

  However, the tapered roller bearings described in Patent Documents 1 to 3 are not necessarily sufficient in reducing the stirring resistance of the lubricating oil, and there is room for improvement in order to further reduce the rotational torque.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a tapered roller bearing that can reduce the agitation resistance of lubricating oil in the bearing and reduce the rotational torque of the bearing. It is in.

The above object of the present invention can be achieved by the following constitution.
(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 tapered rollers disposed so as to be able to roll between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising a plurality of tapered rollers that are held at substantially equal intervals in the circumferential direction, wherein the cage is provided on a small-diameter-side annular portion and an axial end surface of the small-diameter-side annular portion. , A comb-shaped cage having an inner diameter side column portion and an outer diameter side column portion protruding from the inner diameter side and the outer diameter side at substantially equal intervals in the circumferential direction. A tapered roller bearing formed along a flange and an inner ring raceway surface.
(2) The inner diameter side column portion is disposed between the inner ring raceway surface and the pitch circle diameter of the tapered roller, and the outer diameter side column portion is disposed between the pitch circle diameter of the tapered roller and the outer ring raceway surface. The tapered roller bearing described in (1).
(3) 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 tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising a plurality of tapered rollers that are held at substantially equal intervals in the circumferential direction, wherein the cage is provided on a small-diameter-side annular portion and an axial end surface of the small-diameter-side annular portion. A comb-shaped cage having an inner diameter side column and an outer diameter side column projecting from the inner diameter side and the outer diameter side at substantially equal intervals in the circumferential direction, the inner diameter side column part and the outer diameter side column A tapered roller bearing characterized in that the tip end of each part is connected in the radial direction by a connecting part.
(4) 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 tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising a plurality of tapered rollers that are held at substantially equal intervals in the circumferential direction, wherein the cage is provided on a small-diameter-side annular portion and an axial end surface of the small-diameter-side annular portion. The large-diameter-side circle that connects the inner-diameter-side and outer-diameter-side column portions protruding from the inner-diameter side and the outer-diameter side at substantially equal intervals in the circumferential direction, and the tip end portion of the inner-diameter-side column portion And a tapered roller bearing.
(5) 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 tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising a plurality of tapered rollers that are held at substantially equal intervals in the circumferential direction, wherein the cage is provided on a small-diameter-side annular portion and an axial end surface of the small-diameter-side annular portion. A comb-shaped cage having an inner diameter side column portion and an outer diameter side column portion projecting from the inner diameter side and the outer diameter side at substantially equal intervals in the circumferential direction, and the inner diameter side column portion is an inner ring raceway surface And a protrusion protruding radially inward at the tip, and the protrusion engages with an engagement groove formed on the large diameter side of the inner ring raceway surface. Tapered roller bearing characterized by
(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, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer that holds a plurality of tapered rollers at substantially equal intervals in the circumferential direction, and the retainer includes a large-diameter-side annular portion and a small-diameter-side annular ring that is coaxially disposed with the large-diameter-side annular portion. A tapered roller bearing having a plurality of cylindrical portions, and a plurality of column portions that are arranged at substantially equal intervals in the circumferential direction, and connecting the large-diameter side annular portion and the small-diameter side annular portion. It is arranged radially outward from the pitch circle diameter of the rollers, and the gap between the outer peripheral surface of the column part and the outer ring raceway surface is set to become narrower from the small-diameter side annular part toward the large-diameter side annular part. Tapered roller bearings characterized by being made.
(7) The tapered roller bearing according to (6), wherein the column portion includes a step portion so that the outer peripheral surface of the cage approaches the outer ring raceway surface on the large-diameter side annular portion side.
(8) The tapered roller bearing according to (6) or (7), wherein the axial end surface of the small-diameter side annular portion and the inner peripheral surface of the column portion are connected by a substantially triangular rib. .
(9) 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 tapered rollers disposed in the rolling pus between the outer ring raceway surface and the inner ring raceway surface; A retainer that holds a plurality of tapered rollers at substantially equal intervals in the circumferential direction, and the retainer includes a large-diameter-side annular portion and a small-diameter-side annular ring that is coaxially disposed with the large-diameter-side annular portion. A tapered roller bearing having a plurality of cylindrical portions, and a plurality of pillar portions arranged at substantially equal intervals in the circumferential direction, connecting the large-diameter side annular portion and the small-diameter side annular portion. At least one of the circumferential width of the column part on the side ring part side, the thickness of the column part, and the axial width of the large diameter side ring part is set to be smaller than the thickness of the small diameter side ring part. Tapered roller bearing characterized by
(10) 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 tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer that holds a plurality of tapered rollers at substantially equal intervals in the circumferential direction, and the retainer includes a large-diameter-side annular portion and a small-diameter-side annular ring that is coaxially disposed with the large-diameter-side annular portion. A tapered roller bearing having a plurality of cylindrical portions, and a plurality of column portions arranged at substantially equal intervals in the circumferential direction, and connecting the large-diameter side annular portion and the small-diameter side annular portion. A tapered roller bearing characterized by being formed asymmetrically by providing a notch on one side surface in the circumferential direction.
(11) An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer that holds a plurality of tapered rollers at substantially equal intervals in the circumferential direction, and the retainer includes a large-diameter-side annular portion and a small-diameter-side annular ring that is coaxially disposed with the large-diameter-side annular portion. A tapered roller bearing having a plurality of pillar portions, and a plurality of pillar portions that are arranged at substantially equal intervals in the circumferential direction, connecting the large-diameter side annular portion and the small-diameter side annular portion. A tapered roller bearing comprising a protruding portion provided over the entire axial direction of the outer peripheral surface of the portion and facing the outer ring raceway surface.
(12) The tapered roller bearing according to (11), wherein the protruding portion is provided behind the tapered portion in the rotation direction of the tapered roller bearing from the circumferential center of the column portion.
(13) The tapered roller bearing according to (11) or (12), wherein the protruding portion is provided to be inclined with respect to the generatrix of the outer peripheral surface of the cage.
(14) An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer that holds a plurality of tapered rollers at substantially equal intervals in the circumferential direction, and the retainer includes a large-diameter-side annular portion and a small-diameter-side annular ring that is coaxially disposed with the large-diameter-side annular portion. A tapered roller bearing comprising: a plurality of cylindrical portions, and a plurality of column portions that are arranged at substantially equal intervals in the circumferential direction, connecting the large-diameter-side annular portion and the small-diameter-side annular portion. A tapered roller bearing in which a lubricating groove is provided over the entire axial direction of the cage along the surface.
(15) An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer that holds a plurality of tapered rollers at substantially equal intervals in the circumferential direction, and the retainer includes a large-diameter-side annular portion and a small-diameter-side annular ring that is coaxially disposed with the large-diameter-side annular portion. A tapered roller bearing comprising: a plurality of cylindrical portions, and a plurality of pillar portions that are arranged at substantially equal intervals in the circumferential direction, connecting the large-diameter-side annular portion and the small-diameter-side annular portion. A tapered roller bearing in which an uneven portion is formed on the inner peripheral surface of the inner ring so as to be in sliding contact with the small collar portion of the inner ring.
(16) 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 tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer that holds a plurality of tapered rollers at substantially equal intervals in the circumferential direction, and the retainer includes a large-diameter-side annular portion and a small-diameter-side annular ring that is coaxially disposed with the large-diameter-side annular portion. A tapered roller bearing having a plurality of cylindrical portions, and a plurality of column portions that are arranged at substantially equal intervals in the circumferential direction, and connecting the large-diameter-side annular portion and the small-diameter-side annular portion. A through hole that has a size that fills substantially the entire bearing space defined by the outer ring and the tapered roller, and penetrates in the axial direction from the small-diameter side annular part to the large-diameter side annular part inside the column part And a lubrication hole that communicates with the through hole and opens in the raceway surface of the inner ring.
(17) An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer that holds a plurality of tapered rollers at substantially equal intervals in the circumferential direction, and the retainer includes a large-diameter-side annular portion and a small-diameter-side annular ring that is coaxially disposed with the large-diameter-side annular portion. A tapered roller bearing comprising: a plurality of column portions, and a plurality of column portions that are arranged at substantially equal intervals in the circumferential direction, connecting the large-diameter side annular portion and the small-diameter side annular portion. A tapered roller bearing, wherein at least one cross-sectional shape cut along the axis is an airfoil.

  According to the tapered roller bearing of the present invention, the cage is provided on the inner diameter side and the outer diameter side at substantially equal intervals in the circumferential direction on the small diameter side annular portion and the axial end surface of the small diameter side annular portion. The inner diameter side column portion and the outer diameter side column portion, and the inner diameter side column portion is formed along the small collar portion of the inner ring and the inner ring raceway surface. The stirring resistance can be reduced, and the rotational torque of the tapered roller bearing can be reduced.

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

(First embodiment)
First, a first embodiment of a tapered roller bearing according to the present invention will be described with reference to FIG.

  As shown in FIG. 1, the tapered roller bearing 200 of the present embodiment includes an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, an outer ring raceway surface 11a and an inner ring. A plurality of tapered rollers 13 disposed so as to be able to roll between the raceway surface 12a, and a cage 10 that holds the plurality of tapered rollers 13 at equal intervals in the circumferential direction. Further, a small flange portion 12b and a large flange portion 12c are formed at the axial end portion of the inner ring 12, respectively.

  The cage 10 is a so-called comb-shaped cage formed by injection molding of a synthetic resin. The cage 10 has an annular small diameter side annular portion 15 and an axial end face of the small diameter side annular portion 15 in the circumferential direction. An inner diameter side column portion 17 and an outer diameter side column portion 18 that are formed in a cantilever shape projecting on the inner diameter side and the outer diameter side at substantially equal intervals, and a pair of column portions 17 adjacent to each other in the circumferential direction. 18 and a pocket portion 19 that holds the tapered roller 13 in a rollable manner. The cage can be molded by synthetic resin injection molding or sheet metal pressing.

  In the present embodiment, the inner diameter side column portion 17 is formed by bending along the outer periphery of the small collar portion 12b of the inner ring 12 and the inner ring raceway surface 12a, and has a stepped portion 17a. The inner diameter of 17a is set smaller than the outer diameter of the small flange 12b.

  Further, in the present embodiment, the inner diameter side column portion 17 is disposed between the inner ring raceway surface 12 a and the pitch circle diameter PCD of the tapered roller 13, and the outer diameter side column portion 18 is disposed on the pitch circle of the tapered roller 13. It arrange | positions between the diameter PCD and the outer ring raceway surface 11a.

  In the assembly of the tapered roller bearing 200 configured as described above, the inner ring 12 is inserted from the axial direction (right side in FIG. 1A) into the cage 10 in which the tapered roller 13 is incorporated in each pocket portion 19. At this time, the inner diameter side column portion 17 of the retainer 10 is pressed by the small flange portion 12b as the inner ring 12 is inserted and gradually elastically deforms to expand the diameter, and the stepped portion 17a eventually gets over the small flange portion 12b. Assembled. After assembly, the stepped portion 17a contacts the small flange portion 12b, so that the cage 10 does not come off in the axial direction, and the assembled state of the inner ring 12, the tapered roller 13, and the cage 10 is maintained. . Thereby, since it does not come out during conveyance or an assembly, conveyance and an assembly become easy.

  As described above, according to the tapered roller bearing 200 of the present embodiment, the cage 10 is provided at substantially equal intervals in the circumferential direction between the small diameter side annular portion 15 and the axial end surface of the small diameter side annular portion 15. And the inner diameter side column portion 17 and the outer diameter side column portion 18 projecting on the inner diameter side and the outer diameter side, and since the large diameter side of the cage 10 is opened, the smaller diameter side Thus, the lubricating oil flowing into the bearing 200 can be quickly discharged from the outer diameter side to the outside. Thereby, since the stirring resistance of the lubricating oil in the bearing 200 can be reduced, the rotational torque of the tapered roller bearing 200 can be reduced.

  Further, according to the tapered roller bearing 200 of the present embodiment, the inner diameter side column portion 17 is formed along the small flange portion 12b of the inner ring 12 and the inner ring raceway surface 12a and has the stepped portion 17a. Since the stepped portion 17a comes into contact with the small flange portion 12b, the retainer 10 can be prevented from coming out in the axial direction.

(Second Embodiment)
Next, with reference to FIG.2 and FIG.3, 2nd Embodiment of the tapered roller bearing which concerns on this invention is described. Note that portions that are the same as or equivalent to those of the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted or simplified.

  In the cage 20 of the present embodiment, as shown in FIG. 2, the distal end portions of the inner diameter side column portion 17 and the outer diameter side column portion 18 are connected in the radial direction by a connecting portion 21. Moreover, as shown in FIG.2 (c), the cross-sectional shape of the connection part 21 is substantially square.

As described above, according to the tapered roller bearing 200 of the present embodiment, the tip portions of the pair of column portions 17 and 18 of the cage 20 are connected to each other in the radial direction by the connecting portion 21, and thus the pair of column portions. The strength of 17, 18 can be greatly improved. Thereby, it is possible to prevent damage to the pair of column portions 17 and 18 due to vibration load during rotation, collision with the tapered rollers 13 and the cage 20, or the like.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

  As a modification of the present embodiment, as shown in FIGS. 3A to 3C, the cross-sectional shape of the connecting portion 21 may be a circle, an ellipse, and a triangle. In this case, as indicated by an arrow in the figure, the flow of the lubricating oil in the bearing 200 is not hindered, so that it is possible to prevent the lubricating oil from being lowered.

(Third embodiment)
Next, with reference to FIG.4 and FIG.5, 3rd Embodiment of the tapered roller bearing which concerns on this invention is described. Note that portions that are the same as or equivalent to those of the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted or simplified.

  In this embodiment, as shown in FIGS. 4 and 5, the retainer 30 has a large-diameter side annular portion 31 that connects the distal end portion of the inner-diameter side column portion 17 in the circumferential direction. It is a basket type. Further, the outer diameter side column portion 18 is formed in a cantilever shape and has a so-called comb shape.

As described above, according to the tapered roller bearing 200 of the present embodiment, the outer diameter side column portion 18 has a comb shape, so that the lubricating oil that has flowed into the bearing 200 from the smaller diameter side can be quickly removed from the outer diameter side to the outside. The stirring resistance of the lubricating oil in the bearing 200 can be reduced. Further, since the inner diameter side column portion 17 having a relatively small amount of lubricant oil is formed into a cage shape, the inner ring 12, the tapered roller 13, and the cage 30 can be assembled while suppressing an increase in the stirring resistance of the lubricant oil. Can be prevented.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

(Fourth embodiment)
Next, with reference to FIG. 6, 4th Embodiment of the tapered roller bearing which concerns on this invention is described. Note that portions that are the same as or equivalent to those of the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted or simplified.

  In the present embodiment, as shown in FIG. 6, the inner diameter side column portion 17 is disposed to face the inner ring raceway surface 12 a with a slight gap, and protrudes radially inward from the distal end portion of the inner diameter side column portion 17. A protruding portion 41 is formed, and this protruding portion 41 is engaged with an engaging groove 42 formed along the circumferential direction at the large-diameter side end portion of the inner ring raceway surface 12a. In the present embodiment, the small flange portion 12 b is not formed at the small diameter side end portion of the inner ring 12.

As described above, according to the tapered roller bearing 200 of the present embodiment, the inner diameter side column portion 17 is disposed to face the inner ring raceway surface 12a with a slight gap, so that the lubricating oil path in the bearing 200 is provided. Can be narrowed. Thereby, generation | occurrence | production of the vortex | eddy_current of the lubricating oil in the bearing 200 can be suppressed, and the stirring resistance of the lubricating oil in the bearing 200 can be reduced. Further, since the protrusion 41 at the tip of the inner diameter side column portion 17 is engaged with the engagement groove 42 of the inner ring raceway surface 12a, the retainer 40 can be prevented from coming off in the axial direction, and the tapered roller. The assemblability of the bearing 200 can be improved.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

(Fifth embodiment)
Next, a fifth embodiment of the tapered roller bearing according to the present invention will be described with reference to FIGS. Note that portions that are the same as or equivalent to those of the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted or simplified.

  As shown in FIGS. 7 and 8, the cage 50 of the present embodiment includes a large-diameter-side annular portion 51, a small-diameter-side annular portion 52 arranged coaxially with the large-diameter-side annular portion 51, and a large-diameter The side annular part 51 and the small-diameter side annular part 52 are connected to each other, and are formed between the pillar parts 53 arranged in the circumferential direction at a substantially equal interval and the pillar parts 53 adjacent to each other in the circumferential direction, This is a so-called cage-type cage that includes a pocket portion 54 that holds the tapered roller 13 in a rollable manner. In addition, a bent portion 55 extending radially inward from the inner peripheral surface is formed at the axially outer end portion of the small diameter side annular portion 52.

  In the present embodiment, the column portion 53 is disposed radially outward from the pitch circle diameter PCD of the tapered roller 13, and the clearance S between the outer peripheral surface of the column portion 53 and the outer ring raceway surface 11a is smaller than the smaller diameter side. It is set so as to become narrower toward the large-diameter side annular portion 51 than the annular portion 52.

  As described above, according to the tapered roller bearing 200 of the present embodiment, the column portion 53 is disposed radially outward from the pitch circle diameter PCD of the tapered roller 13, and the outer peripheral surface of the column portion 53 and the outer ring are arranged. Since the clearance S with the raceway surface 11a is set to be narrower toward the large-diameter-side annular portion 51 than the small-diameter-side annular portion 52, between the cage 50 and the small flange portion 12b of the inner ring 12 is set. The opening area formed between the cage 50 and the large collar portion 12c of the inner ring 12 is larger than the opening area formed. As a result, the amount of lubricating oil that enters the bearing 200 from between the cage 50 and the small flange portion 12b can be reduced, and the lubricating oil (including foreign matter) that has entered the bearing 200 can be reduced in the opening area. It can be quickly discharged from between the large cage 50 and the large collar 12c. For this reason, the amount of lubricating oil staying in the bearing 200 can be reduced, and the stirring resistance of the lubricating oil can be reduced.

  The lubricating oil that has entered between the cage 50 and the outer ring raceway surface 11a of the outer ring 11 is discharged to the outside along the outer ring raceway surface 11a by centrifugal force. There is almost no influence which narrows the clearance gap S with 11a, and it discharges | emits easily.

  Further, according to the tapered roller bearing 200 of the present embodiment, the bent portion 55 extending inward in the radial direction is formed at the axially outer end portion of the small-diameter side annular portion 52, so that the cage 50 and the small flange portion 12 b The opening area formed between the two can be further reduced. As a result, the amount of lubricating oil that enters the bearing 200 from between the cage 50 and the small flange portion 12b can be further reduced, and the amount of lubricating oil that remains in the bearing 200 can be further reduced. The stirring resistance of the lubricating oil can be further reduced.

  By the way, according to the cage 350 of the conventional tapered roller bearing 300 shown in FIG. 15, when the gap S between the outer peripheral surface of the column portion 353 and the outer ring raceway surface 11a is set constant, as shown in FIG. Since the circumferential width of 353 becomes narrower from the small-diameter-side annular portion 352 toward the large-diameter-side annular portion 351, the strength of the column portion 353 may be lowered. In addition, the code | symbol 354 in a figure is a pocket part.

Therefore, in the cage 50 of the present embodiment, the column portion 53 is disposed radially outward from the pitch circle diameter PCD of the tapered roller 13, and the gap S between the outer peripheral surface of the column portion 53 and the outer ring raceway surface 11a is defined as follows. Since it is set so as to become narrower toward the large-diameter-side annular portion 51 than the small-diameter-side annular portion 52, the circumferential width of the column portion 53 is set to be small-diameter-side annular portion 52 as shown in FIG. Gradually becomes wider toward the large-diameter-side annular portion 51. Thereby, since the intensity | strength of the pillar part 53 can be improved, the rigidity of the holder | retainer 50 can fully be ensured.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

  As a first modification of the present embodiment, as shown in FIG. 9, the distal end portion of the bent portion 55 formed in the small-diameter-side annular portion 52 is further extended radially inward, so that the cage 50 and the small cage The opening area formed between the portions 12b may be further reduced. In this case, the amount of lubricating oil that enters the bearing 200 from between the cage 50 and the small flange portion 12b can be further reduced, and the amount of lubricating oil that remains in the bearing 200 can be further reduced.

  Further, as a second modification of the present embodiment, as shown in FIGS. 10 and 11, the column portion is arranged so that the outer peripheral surface of the cage 50 approaches the outer ring raceway surface 11 a on the large-diameter side annular portion 51 side. A step portion 56 may be formed at a substantially central portion of 53. In this case, the circumferential width of the column portion 53 is increased stepwise at the step portion 56, and the strength of the column portion 53 can be improved.

  Incidentally, as one of main forces acting on the cage 50, there is a force that the tapered roller 13 presses the cage 50 in the circumferential direction when the bearing rotates. At this time, the column portion 53 is in a state in which a distributed load is applied to the both-end supported beam. However, as in the present modification, a step portion 56 is formed in the column portion 53, and the column portion is formed in the step portion 56. By making the circumferential width of 53 stepwise, it is possible to make the column portion 53 difficult to bend as compared with a linear column portion, and the tapered roller 13 can be stably held.

  The retainer 50 can be molded by synthetic resin injection molding or sheet metal pressing. In the case of sheet metal pressing, it may be difficult to ensure the roundness of the small-diameter side annular portion 52 serving as a caulking portion. However, the structure of the cage 50 of this modification having the step portion 56 has a small diameter. Since the side annular part 52 can be disposed at a position away from the outer ring 11, it is effective in avoiding contact between the small diameter side annular part 52 and the outer ring 11.

  As a third modification of the present embodiment, as shown in FIG. 12, substantially triangular ribs 57 may be formed on the inner peripheral side and the outer peripheral side of the step part 56 of the second modification. In this case, the strength of the column part 53 can be further improved, and the column part 53 can be made difficult to bend.

  As a fourth modification of the present embodiment, as shown in FIG. 13, the stepped part 56 may be formed on the small diameter side annular part 52 side as compared with the second modification. In this case, since the space between the retainer 50 and the inner ring 12 can be widened, the lubricating oil discharge performance is improved, and the stirring resistance of the lubricating oil can be further reduced.

  Further, as fifth to seventh modifications of the present embodiment, as shown in FIGS. 14 (a) to 14 (c), between the axial end surface of the small-diameter side annular portion 52 and the inner peripheral surface of the column portion 53. May be connected by a substantially triangular rib 58. In this case, the strength of the column part 53 can be further improved, and the column part 53 can be made difficult to bend. Moreover, the step part 56 which the 5th and 6th modification has is formed on the extension line of the rib 58, and is formed in the continuous shape. Thereby, the discharge property of the lubricating oil by centrifugal force is improved, and the stirring resistance of the lubricating oil can be further reduced. Further, such a continuous shape has an advantage that the flow of the synthetic resin at the time of injection molding becomes smooth and manufacturing defects such as nests are hardly generated.

(Sixth embodiment)
Next, with reference to FIGS. 17-19, 6th Embodiment of the tapered roller bearing which concerns on this invention is described. Note that the same or equivalent parts as those in the first and fifth embodiments are denoted by the same reference numerals in the drawings, and the description thereof is omitted or simplified.

  In the cage 60 of the present embodiment, as shown in FIG. 17, the circumferential width W1 of the column portion 53 on the large-diameter side annular portion 51 side, the thickness T1 of the column portion 53, and the large-diameter side annular portion. The axial width W2 of 51 is set smaller than the thickness T2 of the small-diameter side annular portion 52.

  By the way, generally, the large-diameter side annular portion 51 becomes an obstacle when the lubricating oil flowing into the bearing 200 flows out from the large-diameter side. However, like the cage 60 of the present embodiment, the large-diameter side annular portion 51 has a large diameter. The circumferential width W1 of the column portion 53 on the side of the side annular portion 51, the thickness T1 of the column portion 53, and the axial width W2 of the large diameter side annular portion 51 are defined as the thickness T2 of the small diameter side annular portion 52. By setting it smaller (thinner) than that, it becomes possible to reduce the stirring resistance of the lubricating oil without hindering the discharge of the lubricating oil.

As described above, according to the tapered roller bearing 200 of the present embodiment, the circumferential width W1 of the column portion 53 on the large-diameter side annular portion 51 side, the thickness T1 of the column portion 53, and the large-diameter side circle. Since the axial width W2 of the ring portion 51 is set smaller than the thickness T2 of the small-diameter side annular portion 52, the large-diameter side annular portion 51 prevents the flow of lubricating oil discharged from the large-diameter side. There is nothing. Thereby, since the stirring resistance of the lubricating oil in the bearing 200 can be reduced, the rotational torque of the tapered roller bearing 200 can be reduced.
About another structure and an effect, it is the same as that of the said 1st and 5th embodiment.

  As a first modification of the present embodiment, as shown in FIG. 18, approximately half of the cage 60 on the large diameter side is a metal metal portion 61, and approximately half on the small diameter side is a resin resin portion 62. As an alternative, the metal part 61 and the resin part 62 may be integrally formed by injection molding. In this case, the strength of the column part 53 can be improved and the column part 53 can be made difficult to bend.

  As a second modification of the present embodiment, as shown in FIG. 19, a core metal 63 may be embedded in the large-diameter side annular portion 51 and the column portion 53 of the cage 60 by insert molding. . In this case, the strength of the column part 53 can be improved and the column part 53 can be made difficult to bend.

(Seventh embodiment)
Next, a seventh embodiment of the tapered roller bearing according to the present invention will be described with reference to FIGS. Note that the same or equivalent parts as those in the first and fifth embodiments are denoted by the same reference numerals in the drawings, and the description thereof is omitted or simplified.

  In the cage 70 of the present embodiment, as shown in FIGS. 20 to 22, a notch 71 is formed on one side surface in the circumferential direction of the column portion 53, and the shape of the column portion 53 is asymmetric in the circumferential direction. It has become.

  The notch 71 is provided on the side from which the lubricating oil is effectively discharged when rotating in the direction of high use frequency when the difference in use frequency in the rotation direction is large, such as in the drive system of an automobile. It is done. Specifically, in the case of this embodiment, as shown in FIGS. 21 and 22, the outer ring 11 is fixed and the inner ring 12 is used in a clockwise rotation. It is formed on the left side of the direction (the right side of the pocket portion 54). Although not shown, when the outer ring 11 is fixed and the inner ring 12 is used in a counterclockwise rotation, the notch 71 has a right side surface in the circumferential direction of the column portion 53 (a left side surface of the pocket portion 54). Formed.

  By the way, in the conventional tapered roller bearing 400 shown in FIG. 24, when the outer ring 11 is fixed and the inner ring 12 is used in the clockwise direction as described above, the cage 450, the tapered roller 13 and the inner ring 12 are separated. The lubricating oil in the formed space 401 circulates and rotates in the clockwise direction in the space 401 as indicated by the arrows in the figure. As a result, this lubricating oil spirally flows from the small collar portion 12b side to the large collar portion 12c side of the inner ring 12, finally collides with the large collar portion 12c, and stays in the space 401 to lubricate. It becomes a factor of increase in oil stirring resistance. In addition, the code | symbol 453 in a figure is a pillar part and 454 is a pocket part.

As described above, according to the cage 70 of the present embodiment, the notch 71 is formed on one side surface in the circumferential direction of the column portion 53, so the cage 70, the tapered roller 13, and the inner ring 12 The lubricating oil in the defined space 72 tries to circulate and rotate in the clockwise direction in the space 72 as indicated by an arrow in the figure, but is discharged from the notch 71 to the outer ring 11 side and into the space 72. It is suppressed that it stays. Further, since the notch 71 is not provided on the opposite side (the other side surface in the circumferential direction of the column portion 53), the lubricating oil discharged to the outer ring 11 side again enters the inner ring 12 side from the outer ring 11 side. There is no. Thereby, since the stirring resistance of the lubricating oil in the bearing 200 can be reduced, the rotational torque of the tapered roller bearing 200 can be reduced.
About another structure and an effect, it is the same as that of the said 1st and 5th embodiment.

  As a modification of the present embodiment, as shown in FIG. 23, a stepped portion 73 may be formed on the inner peripheral surface of the column portion 53 on the notch 71 side. In this case, since the lubricating oil that circulates and rotates clockwise in the space 72 is guided to the stepped portion 73, the lubricating oil is efficiently discharged from the notch 71. Thereby, since the discharge property of lubricating oil can be improved, the stirring resistance of lubricating oil can be further reduced.

(Eighth embodiment)
Next, with reference to FIGS. 25-29, 8th Embodiment of the tapered roller bearing which concerns on this invention is described. Note that the same or equivalent parts as those in the first and fifth embodiments are denoted by the same reference numerals in the drawings, and the description thereof is omitted or simplified.

  In the cage 80 of the present embodiment, as shown in FIGS. 25 to 27, the protrusion portion 81 is formed on the outer peripheral surface of the column portion 53 over the entire area in the axial direction of the outer peripheral surface. The strip portion 81 is disposed so as to approach and face the outer ring raceway surface 11 a of the outer ring 11. Further, in the present embodiment, the protrusion 81 is formed behind the center of the column 53 in the rotational direction of the bearing 200 in the rotational direction (right side in the circumferential direction in FIG. 25).

  By the way, when the outer ring 11 is fixed and the inner ring 12 is used in a counterclockwise rotation, the conventional tapered roller bearing 500 shown in FIG. 30 is a wedge region 501 that is a rolling contact inlet portion between the outer ring 11 and the tapered roller 13. A part of the lubricating oil 502 accumulates and is pulled into the wedge region 501 until the lubricating oil 502 is discharged out of the bearing, thereby generating a shear resistance. In addition, the code | symbol 553 in a figure is a pillar part and 554 is a pocket part.

  As described above, according to the tapered roller bearing 200 of the present embodiment, the column portion 53 is formed over the entire area in the axial direction of the outer peripheral surface, and the protruding portion 81 that is close to and faces the outer ring raceway surface 11a. In order to provide, the protrusion 81 scrapes off the lubricating oil 82 adhering to the outer ring raceway surface 11a, and the lubricating oil 82 is guided in the axial direction along the protrusion 81 as shown by the arrows in the figure, It is discharged out of the bearing. As a result, the amount of lubricating oil drawn into the wedge region 83 between the outer ring 11 and the tapered roller 13 can be reduced, so that the shear resistance generated in the wedge region 83 can be reduced, and the tapered roller bearing 200 can be reduced. Rotational torque can be reduced.

Further, according to the tapered roller bearing 200 of the present embodiment, the protrusion 81 is scraped by the protrusion 81 because the protrusion 81 is formed behind the center of the column 53 in the rotation direction of the bearing 200. The amount of the lubricating oil 82 retained can be increased. Thereby, even if a large amount of lubricating oil flows into the bearing 200, an increase in the amount of lubricating oil drawn into the wedge region 83 can be prevented, so that an increase in the rotational torque of the tapered roller bearing 200 can be suppressed. it can.
About another structure and an effect, it is the same as that of the said 1st and 5th embodiment.

  As a modification of the present embodiment, as shown in FIGS. 28 and 29, the protrusion 81 is formed to be inclined with respect to the generatrix of the outer peripheral surface (outer conical surface) of the cage 80. Also good. In addition, the inclination direction of the protrusion 81 differs depending on the rotation direction of the bearing 200. In this modification, the protrusion 81 extends from the front side in the rotation direction of the small-diameter end of the column portion 53 to the large-diameter end. Inclined diagonally toward the rear side in the rotational direction.

  According to this modification, the ridge 81 is formed to be inclined with respect to the generatrix of the outer peripheral surface of the cage 80, and therefore the lubricating oil scraped off by the ridge 81 is indicated by an arrow in the figure. Thus, it guide | induces in one direction from the small diameter side to the large diameter side along the protrusion 81, and is discharged | emitted outside a bearing. The flow of the lubricating oil is a flow in the same direction as the flow of the lubricating oil flowing from the small diameter side to the large diameter side along the outer ring raceway surface 11a due to the centrifugal force acting on the lubricating oil. The lubricating oil can be discharged efficiently. Accordingly, the amount of lubricating oil drawn into the wedge region 83 can be further reduced, so that the shear resistance generated in the wedge region 83 can be further reduced, and the rotational torque of the tapered roller bearing 200 can be further reduced. it can.

The protrusion 81 may be brought into sliding contact with the outer ring raceway surface 11a. However, the effect can be obtained only by arranging the ridge portion 81 so as to oppose the outer ring raceway surface 11a through a slight gap so that the lubricating oil has a rectifying effect. .
In addition, the arrangement of the protrusions 81 is not limited to the outer peripheral surface of the column part 53, and is provided on the inner peripheral surface of the column part 53 so as to face and oppose the inner ring raceway surface 12a. You may make it scrape.
Further, the protruding portion 81 extends not only to the outer peripheral surface or inner peripheral surface of the column portion 53 but also to the outer peripheral surface or inner peripheral surface of the large diameter side annular portion 51 and the small diameter side annular portion 52. Good.

(Ninth embodiment)
Next, with reference to FIGS. 31-33, 9th Embodiment of the tapered roller bearing which concerns on this invention is described. Note that the same or equivalent parts as those in the first and fifth embodiments are denoted by the same reference numerals in the drawings, and the description thereof is omitted or simplified.

  In the cage 90 of the present embodiment, as shown in FIGS. 31 to 33, a lubricating groove 91 having a substantially arc-shaped cross section is formed across the entire axial direction of the cage 90 along the inner peripheral surface of the column portion 53. The lubrication groove 91 is formed so that the circumferential width gradually decreases from the small-diameter-side annular portion 52 toward the large-diameter-side annular portion 51. Further, linear edge portions 92 and 93 are formed at the boundary between the circumferential edge of the lubricating groove 91 and the pocket portion 54, and the edge portions 92 and 93 are lined with the surface of the tapered roller 13. In contact.

  In the tapered roller bearing 200 configured as described above, the lubricating oil adhering to the tapered roller 13 during the rotation of the bearing is scraped off by the edges 92 and 93 (the edge 92 in this embodiment), and then the revolving cage 90 is rotated. It is guided along the lubricating groove 91 by centrifugal force, flows from the small diameter side to the large diameter side, and is discharged out of the bearing.

As described above, according to the tapered roller bearing 200 of the present embodiment, the lubrication groove 91 is formed over the entire axial direction of the retainer 90 along the inner peripheral surface of the column portion 53. The oil is guided along the lubricating groove 91 by the centrifugal force of the revolving cage 90 and is efficiently discharged out of the bearing. Thereby, since the stirring resistance of the lubricating oil in the bearing 200 can be reduced, the rotational torque of the tapered roller bearing 200 can be reduced.
About another structure and an effect, it is the same as that of the said 1st and 5th embodiment.

(10th Embodiment)
Next, a tenth embodiment of the tapered roller bearing according to the present invention will be described with reference to FIGS. 34 to 36. Note that the same or equivalent parts as those in the first and fifth embodiments are denoted by the same reference numerals in the drawings, and the description thereof is omitted or simplified.

  The cage 100 of the present embodiment is made of synthetic resin, and as shown in FIGS. 34 to 36, the cage 100 is viewed in the axial direction in sliding contact with the small collar portion 12 b of the inner ring 12 on the inner peripheral surface of the small-diameter side annular portion 52. As shown in FIG. In addition, the diameter of the inscribed circle inscribed in the waveform of the uneven portion 101 is set to be the same as or slightly smaller than the outer diameter of the small flange portion 12b. Further, the number of peaks of the corrugated portion 101 is set to 3 or more. Further, the height of the ridges of the corrugated portion 101 is set to be smaller than the swivel width of the cage 100. For this reason, the corrugated peak of the concavo-convex portion 101 is in contact with or slightly press-fitted to the outer peripheral surface of the small flange portion 12b.

  In the tapered roller bearing 200 configured as described above, the concave and convex portion 101 of the small-diameter side annular portion 52 is in contact with the outer peripheral surface of the small flange portion 12b or is slightly press-fitted. The concavo-convex portion 101 becomes worn by sliding contact with the small flange portion 12b as the bearing rotates. As a result, a minimum gap is automatically formed between the small-diameter-side annular portion 52 and the small flange portion 12b, which is adapted to the variation of the cage 100 and the amount of swing.

As described above, according to the tapered roller bearing 200 of the present embodiment, the concave and convex portion 101 that is in sliding contact with the small flange portion 12b of the inner ring 12 is formed on the inner peripheral surface of the small-diameter side annular portion 52. The cage 100 is interposed between the small-diameter-side annular portion 52 and the small flange portion 12b by using the cage 100 that is relatively low in dimensional accuracy and can be manufactured at low cost without using expensive parts having dimensional accuracy. It is possible to automatically form a minimum gap adapted to the variation and the amount of swing. Thereby, since the amount of lubricating oil flowing into the bearing 200 can be suppressed, the stirring resistance of the lubricating oil can be reduced, and the rotational torque of the tapered roller bearing 200 can be reduced.
About another structure and an effect, it is the same as that of the said 1st and 5th embodiment.

(Eleventh embodiment)
Next, an eleventh embodiment of the tapered roller bearing according to the present invention will be described with reference to FIGS. Note that the same or equivalent parts as those in the first and fifth embodiments are denoted by the same reference numerals in the drawings, and the description thereof is omitted or simplified.

  In the cage 110 of the present embodiment, as shown in FIGS. 37 and 38, the column portion 53 has at least the outer ring raceway surface 11 a and the inner ring raceway in the bearing space defined by the outer ring 11, the inner ring 12, and the tapered roller 13. The surface 12a has a size that fills substantially the entire region, and has a cross-section that penetrates in the axial direction from the small-diameter-side annular portion 52 to the large-diameter-side annular portion 51 inside the column portion 53. A square through hole 111 and an oil supply hole 112 communicating with the through hole 111 and opening in the inner ring raceway surface 12a are provided. The cross-sectional shape of the through hole 111 is not limited to a square and is arbitrary.

  As described above, according to the tapered roller bearing 200 of the present embodiment, the column portion 53 has a size that fills substantially the entire bearing space defined by the outer ring 11, the inner ring 12, and the tapered roller 13. The amount of lubricating oil staying in the bearing 200 can be reduced by narrowing the lubricating oil flow path. Thereby, since the stirring resistance of the lubricating oil in the bearing 200 can be reduced, the rotational torque of the tapered roller bearing 200 can be reduced.

  Further, according to the tapered roller bearing 200 of the present embodiment, the through hole 111 penetrating in the axial direction from the small diameter side annular part 52 toward the large diameter side annular part 51 is formed in the column part 53. Therefore, the amount of lubricating oil flowing from the small-diameter-side annular portion 52 side to the large-diameter-side annular portion 51 side is ensured, and various devices disposed on the large-diameter-side annular portion 51 side are lubricated satisfactorily. Can do. Further, by changing the size of the through hole 111, for example, the flow rate of the lubricating oil in the transmission can be controlled.

Furthermore, according to the tapered roller bearing 200 of the present embodiment, the oil supply hole 112 that communicates with the through hole 111 and opens to the inner ring raceway surface 12 a is formed inside the column portion 53, and thus flows into the through hole 111. Lubricating oil can be supplied to the inner ring raceway surface 12 a through the oil supply hole 112.
About another structure and an effect, it is the same as that of the said 1st and 5th embodiment.

  As a modification of the present embodiment, as shown in FIG. 39, the through hole 111 may have a circular cross section, and a spiral groove 113 may be formed on the inner peripheral surface of the through hole 111. In this case, the oil supply hole 112 is formed at a position corresponding to the groove 113. Accordingly, since the lubricating oil can be efficiently discharged from the small diameter side annular portion 52 side to the large diameter side annular portion 51 side through the through hole 111, it is arranged on the large diameter side annular portion 51 side. The various devices to be lubricated can be further improved.

(Twelfth embodiment)
Next, a twelfth embodiment of the tapered roller bearing according to the present invention will be described with reference to FIGS. Note that the same or equivalent parts as those in the first and fifth embodiments are denoted by the same reference numerals in the drawings, and the description thereof is omitted or simplified.

  In the cage 120 of the present embodiment, as shown in FIGS. 40 and 41, all the column parts 53 (eight in the present embodiment) are wing-shaped column parts 53A. Further, the airfoil of the column portion 53A of the present embodiment has a long distance from the front end (left end in FIG. 40) to the rear end (right end in FIG. 40) of the outer peripheral side curved surface portion 121 and the inner peripheral curved surface portion 122. The shape is such that the distance from the front end to the rear end is shortened. It is preferable that the shape of the airfoil of the column portion 53 </ b> A is an optimum shape that minimizes fluid resistance according to the Reynolds number of the lubricating oil flowing in the bearing 200. The cage is formed by injection molding of synthetic resin.

  As described above, according to the tapered roller bearing 200 of the present embodiment, since the cross-sectional shape cut along the axial direction of the column portion 53A is a blade shape, the lubricating oil flowing into the bearing 200 from the small diameter side is It flows smoothly along the airfoil of the column portion 53A and is discharged to the outside from the outer diameter side. Thereby, compared with the conventional cage | basket in which the cross-sectional shape of a pillar part is a simple polygon, the fluid resistance of the lubricating oil which acts on the holder | retainer 120 can be reduced significantly. For this reason, since it is not necessary to ensure the rigidity of the cage 120 unnecessarily, the weight of the cage 120 can be reduced.

Further, since the fluid resistance of the lubricating oil acting on the cage 120 is reduced, the lubricating oil that has flowed into the bearing 200 from the small diameter side can be quickly discharged from the outer diameter side to the outside. Thereby, since the stirring resistance of the lubricating oil in the bearing 200 can be reduced, the rotational torque of the tapered roller bearing 200 can be reduced.
About another structure and an effect, it is the same as that of the said 1st and 5th embodiment.

  As a modification of the present embodiment, as shown in FIGS. 42 and 43, a pair of columnar portions 53 arranged at radially opposing positions (symmetrical positions) are replaced by airfoil-shaped column portions 53B. You may make it. Further, the airfoil of the column portion 53B of this modification has a short distance from the front end to the rear end of the outer peripheral curved surface portion 121 and a long distance from the front end to the rear end of the inner peripheral curved surface portion 122. Shape. For this reason, as shown by the arrows in the figure, the pillar portion 53B generates a lift force directed radially inward by the lubricating oil flowing in the bearing 200 from the small diameter side to the large diameter side.

  According to the present modification, a lift force directed radially inward is generated in the pillar portion 53B. Therefore, the lift force and the force for spreading the retainer 130 radially outward are canceled by the centrifugal force, and the retainer 120 is offset. Can prevent damage. Further, since the pair of pillar portions 53B are disposed at positions (symmetrical positions) opposed to the radial direction of the cage 120, a balance of force in the circumferential direction of the cage 120 is ensured, and swinging and the like are unnecessary. Vibration can be suppressed.

  When two or more airfoil-type column parts 53A or 53B and a normal-shaped column part 53 are used in combination, the column parts 53A or the column parts 53B are arranged at equal intervals in the circumferential direction. Thus, it is possible to ensure the balance of the circumferential force of the cage 120.

It is a figure for demonstrating 1st Embodiment of the tapered roller bearing which concerns on this invention, (a) is principal part sectional drawing of a tapered roller bearing, (b) is the sectional view on the AA line of (a). It is. It is a figure for demonstrating 2nd Embodiment of the tapered roller bearing which concerns on this invention, (a) is principal part sectional drawing of a tapered roller bearing, (b) is BB arrow sectional drawing of (a). (C) is CC sectional view taken on the line of (a). It is a figure for demonstrating the modification of the tapered roller bearing of 2nd Embodiment, (a)-(c) is sectional drawing of the part equivalent to FIG.2 (c). It is principal part sectional drawing for demonstrating 3rd Embodiment of the tapered roller bearing which concerns on this invention. It is a perspective view of the holder | retainer shown in FIG. It is principal part sectional drawing for demonstrating 4th Embodiment of the tapered roller bearing which concerns on this invention. It is principal part sectional drawing for demonstrating 5th Embodiment of the tapered roller bearing which concerns on this invention. FIG. 8 is a partial development view showing a state in which the cage shown in FIG. 7 holds a tapered roller. It is principal part sectional drawing for demonstrating the 1st modification of the tapered roller bearing of 5th Embodiment. It is principal part sectional drawing for demonstrating the 2nd modification of the tapered roller bearing of 5th Embodiment. FIG. 11 is a partial development view showing a state in which the cage shown in FIG. 10 holds a tapered roller. It is principal part sectional drawing for demonstrating the 3rd modification of the tapered roller bearing of 5th Embodiment. It is principal part sectional drawing for demonstrating the 4th modification of the tapered roller bearing of 5th Embodiment. It is principal part sectional drawing for demonstrating the 5th-7th modification of the tapered roller bearing of 5th Embodiment. It is principal part sectional drawing for demonstrating the conventional tapered roller bearing. FIG. 16 is a partial development view showing a state in which the cage shown in FIG. 15 holds the tapered roller. It is a figure for demonstrating 6th Embodiment of the tapered roller bearing which concerns on this invention, (a) is a perspective view of a holder | retainer, (b) is DD sectional view taken on line DD of (a). It is a figure for demonstrating the 1st modification of the tapered roller bearing of 6th Embodiment, (a) is a perspective view of a holder | retainer, (b) is EE arrow sectional drawing of (a). . It is principal part sectional drawing for demonstrating the 2nd modification of the tapered roller bearing of 6th Embodiment. It is principal part sectional drawing for demonstrating 7th Embodiment of the tapered roller bearing which concerns on this invention. FIG. 21 is a cross-sectional view taken along line FF in FIG. 20. FIG. 22 is a partial development view showing a state in which the cage shown in FIG. 21 holds the tapered roller. It is principal part sectional drawing for demonstrating the modification of the tapered roller bearing of 7th Embodiment. It is principal part sectional drawing for demonstrating the conventional tapered roller bearing. It is principal part sectional drawing for demonstrating 8th Embodiment of the tapered roller bearing which concerns on this invention. FIG. 26 is a partial development view showing a state where the cage shown in FIG. 25 holds the tapered roller. It is a perspective view of the holder | retainer shown in FIG. It is a partial expanded view for demonstrating the modification of the tapered roller bearing of 8th Embodiment. It is a perspective view of the holder | retainer shown in FIG. It is principal part sectional drawing for demonstrating the conventional tapered roller bearing. It is principal part sectional drawing for demonstrating 9th Embodiment of the tapered roller bearing which concerns on this invention. FIG. 32 is a cross-sectional view taken along line GG in FIG. 31. FIG. 33 is a partial development view showing a state in which the retainer shown in FIG. 32 holds a tapered roller. It is principal part sectional drawing for demonstrating 10th Embodiment of the tapered roller bearing which concerns on this invention. It is the figure which looked at the tapered roller bearing shown in FIG. 34 from the axial direction. It is a perspective view of the holder | retainer shown in FIG. It is principal part sectional drawing for demonstrating 11th Embodiment of the tapered roller bearing which concerns on this invention. It is a HH arrow directional cross-sectional view of FIG. It is principal part sectional drawing for demonstrating the modification of the tapered roller bearing of 11th Embodiment. It is principal part sectional drawing for demonstrating 12th Embodiment of the tapered roller bearing which concerns on this invention. It is sectional drawing which looked at the tapered roller bearing shown in FIG. 40 from the axial direction. It is principal part sectional drawing for demonstrating the modification of the tapered roller bearing of 12th Embodiment. It is sectional drawing which looked at the tapered roller bearing shown in FIG. 42 from the axial direction.

Explanation of symbols

200 Tapered roller bearing 11 Outer ring 11a Outer ring raceway surface 12 Inner ring 12a Inner ring raceway surface 12b Small flange portion 12c Large collar portion 13 Tapered roller 10 Cage 15 Small diameter side annular portion 17 Inner diameter side column portion 17a Stepped portion 18 Outer diameter side column Part 19 Pocket part 20 Cage 21 Coupling part 30 Cage 31 Large diameter side annular part 40 Cage 41 Projection part 42 Engaging groove 50 Cage 51 Large diameter side annular part 52 Small diameter side annular part 53 Column part 54 Pocket portion 55 Bending portion 56 Step portion 57 Rib 58 Rib S Clearance 60 Cage 61 Metal portion 62 Resin portion 63 Core metal W1 Column width in the circumferential direction T1 Column thickness W2 Axial direction of the large-diameter side annular portion Width T2 Thickness of small diameter side annular portion 70 Cage 71 Notch 72 Space 73 Step portion 80 Cage 81 Projection portion 82 Lubricating oil 83 Wedge region 90 Cage 91 Lubrication groove 92 Edge portion 93 Edge part 100 Cage 101 Uneven part 110 Cage 111 Through hole 112 Oil supply hole 113 Groove part 120 Cage 53A Column part 53B Column part 121 Outer peripheral side curved part 122 Inner peripheral side curved part

Claims (17)

An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising: a cage that holds the plurality of tapered rollers at substantially equal intervals in a circumferential direction;
The cage includes a small-diameter side annular portion,
A comb-shaped cage having an inner diameter side column portion and an outer diameter side column portion protruding on the inner diameter side and the outer diameter side at substantially equal intervals in the circumferential direction on the axial end surface of the small diameter side annular portion. Yes,
The tapered roller bearing, wherein the inner diameter side column portion is formed along a small flange portion of the inner ring and the inner ring raceway surface. The inner diameter side column portion is disposed between the inner ring raceway surface and the pitch circle diameter of the tapered roller,
The tapered roller bearing according to claim 1, wherein the outer diameter side column portion is disposed between a pitch circle diameter of the tapered roller and the outer ring raceway surface. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising: a cage that holds the plurality of tapered rollers at substantially equal intervals in a circumferential direction;
The cage includes a small-diameter side annular portion,
A comb-shaped cage having an inner diameter side column portion and an outer diameter side column portion protruding on the inner diameter side and the outer diameter side at substantially equal intervals in the circumferential direction on the axial end surface of the small diameter side annular portion. Yes,
A tapered roller bearing characterized in that tip portions of the inner diameter side column portion and the outer diameter side column portion are connected in a radial direction by a connecting portion. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising: a cage that holds the plurality of tapered rollers at substantially equal intervals in a circumferential direction;
The cage includes a small-diameter side annular portion,
An inner diameter side column part and an outer diameter side column part projecting on the inner diameter side and the outer diameter side at substantially equal intervals in the circumferential direction on the axial end surface of the small diameter side annular part,
A tapered roller bearing comprising: a large-diameter-side annular portion that connects a distal end portion of the inner-diameter-side column portion in a circumferential direction. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising: a cage that holds the plurality of tapered rollers at substantially equal intervals in a circumferential direction;
The cage includes a small-diameter side annular portion,
A comb-shaped cage having an inner diameter side column portion and an outer diameter side column portion protruding on the inner diameter side and the outer diameter side at substantially equal intervals in the circumferential direction on the axial end surface of the small diameter side annular portion. Yes,
The inner diameter side column portion is disposed to face the inner ring raceway surface with a slight gap, and includes a protruding portion projecting radially inward at a tip portion,
The tapered roller bearing, wherein the protrusion is engaged with an engagement groove formed on a large diameter side of the inner ring raceway surface. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer for holding the plurality of tapered rollers at substantially equal intervals in the circumferential direction,
The retainer connects the large-diameter side annular portion, the small-diameter-side annular portion arranged coaxially with the large-diameter-side annular portion, and the large-diameter-side annular portion and the small-diameter-side annular portion. A plurality of columnar portions arranged at substantially equal intervals in the circumferential direction, and a tapered roller bearing having:
The column portion is disposed radially outward from the pitch circle diameter of the tapered roller, and a gap between the outer peripheral surface of the column portion and the outer ring raceway surface is larger than the small diameter side annular portion. A tapered roller bearing, wherein the tapered roller bearing is set so as to become narrower toward the annular portion.   The tapered roller bearing according to claim 6, wherein the column part includes a step part so that an outer peripheral surface of the cage approaches the outer ring raceway surface on the large-diameter side annular part side.   The tapered roller bearing according to claim 6 or 7, wherein the axial end surface of the small-diameter side annular portion and the inner peripheral surface of the column portion are connected by a substantially triangular rib. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer for holding the plurality of tapered rollers at substantially equal intervals in the circumferential direction,
The retainer connects the large-diameter side annular portion, the small-diameter-side annular portion arranged coaxially with the large-diameter-side annular portion, and the large-diameter-side annular portion and the small-diameter-side annular portion. A plurality of columnar portions arranged at substantially equal intervals in the circumferential direction, and a tapered roller bearing having:
At least one of the circumferential width of the column portion on the large-diameter side annular portion side of the cage, the thickness of the column portion, and the axial width of the large-diameter side annular portion is the small-diameter side circle. A tapered roller bearing characterized in that it is set smaller than the thickness of the ring portion. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer for holding the plurality of tapered rollers at substantially equal intervals in the circumferential direction,
The retainer connects the large-diameter side annular portion, the small-diameter-side annular portion arranged coaxially with the large-diameter-side annular portion, and the large-diameter-side annular portion and the small-diameter-side annular portion. A plurality of columnar portions arranged at substantially equal intervals in the circumferential direction, and a tapered roller bearing having:
A tapered roller bearing, wherein the column part is formed asymmetrically by providing a notch on one side surface in the circumferential direction. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer for holding the plurality of tapered rollers at substantially equal intervals in the circumferential direction,
The retainer connects the large-diameter side annular portion, the small-diameter-side annular portion arranged coaxially with the large-diameter-side annular portion, and the large-diameter-side annular portion and the small-diameter-side annular portion. A plurality of columnar portions arranged at substantially equal intervals in the circumferential direction, and a tapered roller bearing having:
The tapered portion is provided with a protruding portion that is provided over the entire axial direction of the outer peripheral surface of the column portion and faces the outer ring raceway surface.   The tapered roller bearing according to claim 11, wherein the protruding portion is provided at a rear side in a rotation direction of the tapered roller bearing from a circumferential center of the column portion.   The tapered roller bearing according to claim 11 or 12, wherein the protruding portion is provided to be inclined with respect to a generatrix of the outer peripheral surface of the cage. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer for holding the plurality of tapered rollers at substantially equal intervals in the circumferential direction,
The retainer connects the large-diameter side annular portion, the small-diameter-side annular portion arranged coaxially with the large-diameter-side annular portion, and the large-diameter-side annular portion and the small-diameter-side annular portion. A plurality of columnar portions arranged at substantially equal intervals in the circumferential direction, and a tapered roller bearing having:
A tapered roller bearing, wherein a lubricating groove is provided over the entire axial direction of the cage along the inner peripheral surface of the column portion. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer for holding the plurality of tapered rollers at substantially equal intervals in the circumferential direction,
The retainer connects the large-diameter side annular portion, the small-diameter-side annular portion arranged coaxially with the large-diameter-side annular portion, and the large-diameter-side annular portion and the small-diameter-side annular portion. A plurality of columnar portions arranged at substantially equal intervals in the circumferential direction, and a tapered roller bearing having:
A tapered roller bearing, wherein a concave and convex portion is formed on an inner peripheral surface of the small-diameter side annular portion so as to be in sliding contact with a small flange portion of the inner ring. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer for holding the plurality of tapered rollers at substantially equal intervals in the circumferential direction,
The retainer connects the large-diameter side annular portion, the small-diameter-side annular portion arranged coaxially with the large-diameter-side annular portion, and the large-diameter-side annular portion and the small-diameter-side annular portion. A plurality of columnar portions arranged at substantially equal intervals in the circumferential direction, and a tapered roller bearing having:
The column portion has a size that fills substantially the entire bearing space defined by the inner ring, the outer ring, and the tapered roller,
Inside the pillar portion, a through hole that penetrates from the small diameter side annular portion to the large diameter side annular portion in the axial direction, and an oil supply hole that communicates with the through hole and opens in the inner ring raceway surface. Tapered roller bearings characterized by comprising. An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A retainer for holding the plurality of tapered rollers at substantially equal intervals in the circumferential direction,
The retainer connects the large-diameter side annular portion, the small-diameter-side annular portion arranged coaxially with the large-diameter-side annular portion, and the large-diameter-side annular portion and the small-diameter-side annular portion. A plurality of columnar portions arranged at substantially equal intervals in the circumferential direction, and a tapered roller bearing having:
A tapered roller bearing, wherein at least one cross-sectional shape cut along the axial direction of the column part is an airfoil.

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