JP5024090B2 - Tapered roller bearing, inner ring structure, and method of assembling tapered roller bearing - Google Patents

Description

  The present invention relates to a tapered roller bearing, and more particularly to a tapered roller bearing that is suitable for use in rotatably supporting a main shaft of a wind turbine generator.

  The present invention also relates to a method of assembling a tapered roller bearing, and more particularly to a method of assembling a tapered roller bearing that is suitable for use in assembling a tapered roller bearing that rotatably supports a main shaft of a wind turbine generator.

  The present invention also relates to an inner ring assembly structure that facilitates the assembly of a tapered roller bearing.

  Conventionally, as a method for assembling a tapered roller bearing, there is one described in JP-A-2006-46465.

  In the method of assembling the tapered roller bearing, the tapered roller is assembled by the following procedure.

  First, the inner ring assembly in which the tapered roller is not detached from the inner ring by the cage is assembled by assembling the inner ring, the cage and the tapered roller.

  Next, the inner ring assembly is lifted upward in the vertical direction by a lifting tool with the small-diameter end face of the tapered roller facing downward in the vertical direction.

  Finally, the inner ring assembly is lowered vertically downward toward the outer ring located vertically below the inner ring assembly, and the inner ring assembly is assembled to the outer ring to complete the assembly of the tapered roller bearing.

  In the above background, for example, there is a demand for a larger load capacity in a tapered roller bearing that supports the main shaft of a wind turbine generator.

  Here, in order to increase the load capacity of the tapered roller bearing, when a so-called full roller tapered roller bearing without a cage is used as the tapered roller bearing that supports the main shaft of the wind turbine generator, the tapered roller is inserted in the cage. Since it cannot be integrated with the inner ring, there is a problem that when the inner ring is lifted upward in the vertical direction by a lifting tool, the tapered roller falls from the inner ring and the full roller tapered roller bearing cannot be assembled.

Therefore, there is a problem that the full roller tapered roller bearing cannot be adopted as the tapered roller bearing that supports the main shaft of the wind turbine generator, and the load capacity of the tapered roller bearing cannot be significantly increased.
JP 2006-46465 A (FIG. 7)

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tapered roller bearing in which a tapered roller does not separate from an outer peripheral conical raceway surface of an inner ring at the time of assembly even without a cage.

  Another object of the present invention is to provide a method for assembling a tapered roller bearing in which the tapered roller is not detached from the outer peripheral conical raceway surface of the inner ring during assembly.

  Another object of the present invention is to provide an inner ring structure in which a tapered roller does not separate from the outer peripheral conical raceway surface of the inner ring without a cage.

In order to solve the above problems, the tapered roller bearing of the present invention is
An inner ring having an outer circumferential conical raceway surface and a flange surface located on the larger diameter side in the axial direction of the outer circumferential conical raceway surface;
An outer ring having an inner circumferential conical raceway surface;
A plurality of tapered rollers disposed between the outer peripheral conical raceway surface of the inner ring and the inner peripheral conical raceway surface of the outer ring;
The inner ring has a jig attaching portion for attaching a jig for pressing the tapered rollers on the outer peripheral conical raceway surface to the flange surface of the inner ring, and the inner ring ,
Two tapered rollers adjacent to each other in the circumferential direction of the outer peripheral tapered raceway surface is characterized contactable der Rukoto.

  According to the present invention, the inner ring has a jig attaching portion for attaching a jig for pressing the tapered roller on the outer circumferential conical raceway surface to the flange surface of the inner ring. After disposing a plurality of tapered rollers on the outer circumference track of the inner ring, each tapered roller can be pressed against the flange surface of the inner ring by fixing the jig to the inner ring. .

  Therefore, even when the tapered roller bearing is assembled, the inner ring is arranged in any state before the outer ring is assembled (for example, the inner ring is arranged with the outer peripheral conical raceway faced downward in the vertical direction). And even if a cage is not present, the tapered rollers arranged on the outer circumferential conical raceway surface do not leave the outer circumferential conical raceway surface.

  Therefore, during assembly, the inner ring axial center extends in the vertical direction (for example, when the tapered roller bearing is disposed on the main shaft of the wind turbine generator), or the inner ring axial center is horizontal. Even in the case of extending in the direction, the tapered roller bearing can be easily assembled.

  Further, according to the present invention, the outer ring can be assembled to the inner ring structure (inner ring, plural tapered rollers and jig) in a state where the tapered rollers are pressed against the flange surface by the jig. A preload can be applied between the inner peripheral conical raceway surface of the outer ring and the outer peripheral conical raceway surface of the inner ring in a state where the tapered rollers are pressed against the flange surface. Therefore, it is possible to prevent the preload loss that occurs when the preload is applied in a state where the tapered roller is not in contact with the large-diameter side surface of the outer peripheral conical raceway surface of the inner ring. Preload can be set accurately.

  In one embodiment, the jig mounting portion is a screw hole that opens to the end surface on the small diameter side of the outer peripheral conical raceway surface in the axial direction of the inner ring.

  According to the embodiment, since the jig mounting portion is a screw hole that opens to the end surface on the small diameter side of the outer peripheral conical raceway surface in the axial direction of the inner ring, the jig can be easily attached to the inner ring. It can be fixed inexpensively and reliably.

Further , according to the present invention , the two tapered rollers adjacent to each other in the circumferential direction can contact each other, and the tapered roller bearing is a so-called full roller tapered roller bearing. In comparison, the load capacity of the tapered roller bearing can be significantly increased.

The inner ring structure of the present invention is
An inner ring having an outer circumferential conical raceway surface, a flange surface located on the larger diameter side in the axial direction of the outer circumferential cone raceway surface, and a screw hole opened on the end surface in the axial direction located on the smaller diameter side of the outer circumferential cone raceway surface When,
A plurality of tapered rollers located on the outer circumferential conical raceway surface;
A jig fixed to the inner ring,
Two tapered rollers adjacent in the circumferential direction of the inner ring can be contacted,
The jig is
In the state facing the end surface of the inner ring in the axial direction, the outer ring extends in a direction substantially parallel to the end surface of the inner ring, and has an end surface facing portion having a through hole, and the inner ring of the end surface facing portion. An annular pressing ring having a roller pressing portion that is continuous with the radially outer end and extends to the flange surface side in the axial direction and to the radially outer side;
A fastening member passing through the through hole of the end face facing portion and screwed into the screw hole of the inner ring;
A biasing member that biases both the end face of the inner ring and the end face facing portion in a direction in which the axial distance between the end face of the inner ring and the end face facing portion increases;
The roller pressing portion of the pressing ring presses the plurality of tapered rollers on the outer peripheral conical raceway surface against the flange surface.

  According to the present invention, since the tapered roller on the outer peripheral conical raceway surface is pressed against the flange surface by the roller pressing portion of the jig fixed to the screw hole of the inner ring, the inner ring is in any state. Even in the absence of the cage, the tapered roller can be sandwiched by the roller pressing portion and the flange surface, and the tapered roller can be held on the outer circumferential conical raceway surface. Therefore, since the tapered roller does not separate from the outer peripheral conical raceway surface, the outer ring can be easily assembled to the inner ring structure.

  Further, according to the present invention, after the outer ring is assembled, the preload can be applied in a state where the tapered roller is pressed against the flange surface of the inner ring. Therefore, the outer ring is assembled based on the inner ring structure, and the preload is applied. After applying the tapered roller bearing with the jig removed, or after assembling the outer ring based on this inner ring structure and applying preload, the jig roller pressing part without removing the jig from the inner ring Can be prevented from occurring in the tapered roller bearing positioned at a distance from the tapered roller.

Further, the method for assembling the tapered roller bearing of the present invention includes:
An outer ring having an inner circumferential conical raceway surface is connected to a shaft extending in a substantially vertical direction so that a small diameter side of the inner circumferential conical raceway surface of the outer ring is below the vertical direction. Passing from the side, the outer ring is allowed to stand on the lower side in the vertical direction of the shaft,
The inner ring structure of the invention is moved from the outside of the shaft in the vertical direction downward in the vertical direction with the end face of the inner ring of the inner ring structure facing downward in the vertical direction, and the shaft The outer peripheral surface of the outer peripheral surface is fixed by being externally fitted by press-fitting,
Then, the outer ring is moved vertically upward and assembled to the tapered roller of the inner ring structure,
Thereafter, the roller pressing portion of the pressing ring of the inner ring structure is separated from the tapered roller.

  According to the present invention, in a state where the tapered roller on the outer peripheral conical raceway surface is pressed against the flange surface by the roller pressing portion of the jig fixed to the screw hole of the inner ring, Since it is assembled, the tapered roller does not separate from the outer peripheral conical raceway surface of the inner ring with the axial center of the inner ring positioned in the vertical direction even in the absence of the cage. Therefore, the tapered roller bearing can be easily assembled.

  In addition, according to the present invention, preload can be applied in a state where the tapered roller is pressed against the flange surface of the inner ring, so that no preload loss occurs after the outer ring is assembled. Therefore, after assembling the outer ring based on this inner ring structure, the tapered roller bearing obtained by removing the jig, or after assembling the outer ring based on this inner ring structure, without removing the jig from the inner ring, It is possible to prevent the preload loss from occurring in the tapered roller bearing in which the roller pressing portion of the jig is positioned at a distance from the tapered roller.

  According to the tapered roller bearing of the present invention, the inner ring is connected to the tapered roller on the outer peripheral conical raceway surface of the inner ring by the flange surface of the large collar portion of the inner ring (the flange surface of the large diameter side of the outer peripheral conical raceway surface of the inner ring). ), A jig mounting portion for mounting the jig on the inner ring is provided. After arranging a plurality of tapered rollers on the outer race of the inner ring, the jig is fixed to the inner ring. Each tapered roller can be pressed against the flange surface of the inner ring with the fixed jig. Therefore, even when the tapered roller bearing is assembled, before the outer ring is assembled, the inner ring is arranged in any state, and the tapered roller arranged on the outer circumferential conical raceway surface is arranged on the outer circumferential conical surface even if the cage is not present. The tapered roller bearing can be easily assembled without being separated from the raceway surface.

  According to the tapered roller bearing of the present invention, the outer ring is assembled to the inner ring structure (the inner ring, the plurality of tapered rollers and the jig) while the tapered rollers are pressed against the flange surface by the jig. In addition, a preload can be applied between the inner peripheral conical raceway surface of the outer ring and the outer peripheral conical raceway surface of the inner ring. Therefore, the preload that occurs when the preload is applied in a state where the tapered roller is not in contact with the large diameter side surface of the outer peripheral conical raceway surface of the inner ring does not occur, and the preload of the tapered roller bearing is set to a predetermined value. The preload can be accurately set.

  Further, according to the inner ring structure of the present invention, the tapered roller on the outer peripheral conical raceway surface of the inner ring causes the tapered surface (inner ring of the inner ring) of the inner ring by the roller pressing portion of the jig fixed to the screw hole of the inner ring. Of the outer peripheral conical raceway surface of the outer diameter conical raceway surface), so that the tapered roller is moved by the roller pressing portion and the flange surface regardless of the state of the inner ring and the absence of the cage. The outer ring can be held on the outer circumferential conical raceway surface, and the outer ring can be easily assembled to the inner ring structure.

  Further, according to the inner ring structure of the present invention, preload can be applied in a state where the tapered roller is pressed against the flange portion of the inner ring, so that no preload loss occurs after the outer ring is assembled. Therefore, after assembling the outer ring based on this inner ring structure, the tapered roller bearing obtained by removing the jig, or after assembling the outer ring based on this inner ring structure, without removing the jig from the inner ring, It is possible to prevent the preload loss from occurring in the tapered roller bearing in which the roller pressing portion of the jig is positioned at a distance from the tapered roller.

  Further, according to the method of assembling the tapered roller bearing device of the present invention, the tapered roller on the outer peripheral conical raceway surface of the inner ring is caused to be a large collar portion of the inner ring by the roller pressing portion of the jig fixed to the screw hole of the inner ring. Since the outer ring is assembled while pressed against the flange surface (the flange surface on the large-diameter side of the outer peripheral conical raceway surface of the inner ring), the axial center of the inner ring is The tapered roller is not separated from the outer peripheral conical raceway surface of the inner ring in a state where it is positioned in the direction. Therefore, the tapered roller bearing can be easily assembled.

  Further, according to the method of assembling the tapered roller bearing device of the present invention, preload can be applied while the tapered roller is pressed against the flange portion of the inner ring, so that preload loss occurs after the outer ring is assembled. There is no. Therefore, after assembling the outer ring based on this inner ring structure, the tapered roller bearing obtained by removing the jig, or after assembling the outer ring based on this inner ring structure, without removing the jig from the inner ring, It is possible to prevent the preload loss from occurring in the tapered roller bearing in which the roller pressing portion of the jig is positioned at a distance from the tapered roller.

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

  FIG. 1 is a schematic cross-sectional view in the axial direction of an inner ring structure 10 according to an embodiment of the present invention.

  The inner ring structure 10 includes an inner ring 1 of a tapered roller bearing, a plurality of tapered rollers 2, and a jig 3.

  The inner ring 1 has an outer peripheral conical raceway surface 11 on the outer peripheral surface thereof, and has a large collar portion 12 on the larger diameter side in the axial direction of the outer peripheral conical raceway surface 11. The inner ring 1 has a plurality of screw holes 16 as an example of a jig mounting portion. Each of the screw holes 16 extends substantially in the axial direction of the inner ring 1 and opens on the end surface 17 on the small diameter side of the conical raceway surface 11 in the axial direction of the inner ring 1. Each of the tapered rollers 2 is disposed on the outer peripheral conical raceway surface 11.

  The jig 3 includes an annular pressing ring 20, a plurality of bolts 21 as an example of a fastening member, and a coil spring 22 as an example of an urging member.

  The pressing ring 20 includes an end face facing portion 30 and a roller pressing portion 31. The end face facing portion 30 has a substantially disk shape. The end face facing portion 30 faces the end face 17 on the small diameter side of the conical raceway surface 11 in the axial direction of the inner ring 1 in the axial direction. The end face facing portion 30 extends substantially in the radial direction of the annular ring 20. The end face facing portion 30 has a central through hole 40 extending in the axial direction at the central portion. The diameter of the central through hole 40 is larger than the inner diameter of the inner peripheral surface of the inner ring 1.

  The end face facing portion 30 has a plurality of through holes (not shown). Each of the through holes is located outward of the central through hole 40 in the radial direction. The plurality of through holes have the same shape and the same radial position, and are arranged at intervals in the circumferential direction of the pressing ring 20. The number of through holes in the end face facing portion 30 is the same as the number of screw holes 16 in the inner ring 1. Each screw hole 16 extends in the axial direction of the inner ring 1 at a predetermined position where the center of the central through hole 40 and the center of the inner ring 1 are aligned and relatively rotated in the circumferential direction. It is formed so as to be included within the range.

  On the other hand, the roller pressing portion 31 has an annular shape, and from the radially outer end of the inner ring 1 of the end face facing portion 30 to the axial large collar 12 side and radially outward via a bent portion. Extends to the side. The inner peripheral surface of the roller pressing portion 31 has a substantially conical shape.

  The bolt 21 includes a head portion 50 and a shaft portion 51. The shaft portion 51 penetrates through the through hole of the end face facing portion 30 and is then screwed into the screw hole 16 of the inner ring 1. Yes. The head 50 is in contact with the axially outer end surface 53 of the end surface facing portion 30. The number of the bolts 21 is the same as the number of the screw holes 16 of the inner ring 1, and each bolt 21 penetrates through a different through hole and then extends through the through hole in the axial direction of the inner ring 1. The screw holes 16 are respectively screwed into the screw holes 16 at the positions.

  As shown in FIG. 1, the coil spring 22 is fitted on the outer peripheral surface of the shaft portion 51 of the bolt 21. The coil spring 22 is sandwiched from both sides in the axial direction by the end surface 17 on the small diameter side of the conical raceway surface 11 in the axial direction of the inner ring 1 and the end surface 54 in the axial direction of the end surface facing portion 30. The coil spring 22 urges both the end surface 17 and the end surface facing portion 30 of the inner ring 1 in a direction in which the axial distance between the end surface 17 and the end surface facing portion 30 of the inner ring 1 increases.

  The coil spring 22 prevents a sudden force from the roller pressing portion 31 to the tapered roller 2 when the bolt 21 is tightened, and the tapered roller 2 is prevented from being damaged (indentation is formed) or deformed. is doing. The coil spring 22 adjusts the force with which the roller pressing portion 31 of the jig 3 presses the tapered roller 2.

  As shown in FIG. 1, each tapered roller 2 is located on the outer circumferential conical track surface 11 of the inner ring 1. Two tapered rollers 2 adjacent to each other in the circumferential direction of the inner ring 1 can be brought into contact with each other. The tapered roller 2 is pressed to the large diameter side of the outer peripheral conical raceway surface 11 by the end surface of the roller pressing portion 31 of the jig 3 fixed to the inner ring 1 on the large-diameter side of the outer peripheral conical raceway surface 11. 14 is pressed. Each tapered roller 2 is pressed from both sides in the axial direction by the end surface of the roller pressing portion 31 on the side of the large collar portion 12 and the collar surface 14 of the large collar portion 12, and is held on the outer circumferential conical raceway surface 11 of the inner ring 1. Thus, it does not leave the outer circumferential conical track surface 11.

  As shown in FIG. 1, in a state where the tapered roller 2 is disposed on the outer peripheral conical raceway surface 11 and the jig 3 is fixed to the inner ring 1, the roller pressing portion 31 on the large collar 12 side. The end surface extends in parallel with the small end surface 27 in the axial direction of the tapered roller 2. In this way, the tapered roller 2 can be efficiently pressed against the flange surface 14 of the large collar 12 at the end surface of the roller pressing section 31 on the large collar 12 side.

  FIG. 2 is a schematic cross-sectional view in the axial direction of the tapered roller bearing of one embodiment of the present invention during assembly.

  The tapered roller bearing is fixed to a main shaft (not shown) extending in the vertical direction in the wind turbine generator, and rotatably supports the main shaft.

  Hereinafter, the structure of the tapered roller bearing and the method of assembling the tapered roller bearing according to one embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  First, the inner ring structure 10 shown in FIG. 1 is assembled, and the tapered rollers 2 are held on the outer peripheral conical raceway surface 11 of the inner ring 1.

  Next, the outer ring indicated by 4 in FIG. 2 is connected to the main shaft from above the main shaft extending in the vertical direction so that the small diameter side of the inner circumferential conical raceway surface 18 of the outer ring 4 is below the vertical direction. Pass through and stand still below the main shaft in the vertical direction.

  Subsequently, the inner peripheral surface of the inner ring 1 of the assembled inner ring structure 10 is set so that the small-diameter end surface of the tapered roller 2 (the end surface having the smaller diameter of the two axial end surfaces of the tapered roller 2) is vertically downward. In the state toward the top, the main shaft is moved from the upper part of the main shaft in the vertical direction to the lower part in the vertical direction and is fitted and fixed by press-fitting.

  Subsequently, the outer ring 4 is moved vertically upward from the stationary position, and the outer ring 4 is assembled to the tapered roller 2 of the inner ring structure 10.

  Finally, the bolt 21 of the inner ring structure 10 is loosened, the jig 3 is removed from the inner ring structure 10, and the main shaft of the wind turbine generator of the tapered roller bearing composed of the outer ring 4, the inner ring 1 and the plurality of tapered rollers 2 is obtained. Complete the assembly.

  A jig 3 for pressing the tapered roller 2 on the outer peripheral conical raceway surface 11 against the flange surface 14 of the inner ring 1 by the inner ring 1 of the tapered roller bearing of the above-described embodiment assembled to the main shaft of the wind power generator, It goes without saying that a jig mounting portion for mounting on the inner ring 1, that is, a screw hole 16 is provided.

  According to the tapered roller bearing of the above-described embodiment, the inner ring 1 is provided with the jig 3 for pressing the tapered roller 2 on the outer circumferential conical raceway surface 11 against the flange surface 14 of the large collar portion 12 of the inner ring 1. Since a plurality of tapered rollers 2 are disposed on the outer peripheral conical track 11 of the inner ring 1, the jig 3 is fixed to the inner ring 1. Thus, each tapered roller 2 can be pressed against the flange surface 14 of the inner ring 1 with the fixed jig 3.

  Therefore, even when the tapered roller bearing is assembled, before the outer ring 4 is assembled, the inner ring 1 is arranged in any state (for example, the inner ring 1 has a part of the outer circumferential conical raceway surface 11 directed downward in the vertical direction. The tapered rollers 2 arranged on the outer circumferential conical raceway surface 11 are not separated from the outer circumferential conical raceway surface 11 even if the cage is not present.

  Therefore, during the assembly, the axial center of the inner ring 1 extends in the vertical direction (for example, when the tapered roller bearing is disposed on the main shaft of the wind turbine generator), or the axial center of the inner ring 1 is Even when extending in the horizontal direction, the tapered roller bearing can be easily assembled.

  Further, according to the tapered roller bearing of the above-described embodiment, the inner ring structure 10 (inner ring 1, a plurality of tapered rollers) in a state in which each tapered roller 2 is pressed against the flange surface 14 of the large flange portion 12 by the jig 3. 2 and the jig 3), the outer ring 4 can be assembled, and each tapered roller 2 is pressed against the flange surface 14, and the inner circumferential conical track surface 18 of the outer ring 4 and the inner ring 1 are A preload can be applied between the outer circumferential conical track surface 11. Therefore, it is possible to prevent the preload loss that occurs when the preload is applied in a state where the tapered roller is not in contact with the large diameter side surface of the outer peripheral conical raceway surface of the inner ring, and the preload of the tapered roller bearing is reduced to a predetermined preload. Can be set accurately.

  Further, according to the tapered roller bearing of the above embodiment, the jig mounting portion is the screw hole 16 opened in the end surface 17 on the small diameter side of the outer circumferential conical raceway surface 11 in the axial direction of the inner ring 1. The inner ring 1 can be fixed easily, inexpensively and reliably.

  Further, according to the tapered roller bearing of the above embodiment, the two tapered rollers 2 adjacent to each other in the circumferential direction can contact each other, and the tapered roller bearing is a so-called full roller tapered roller bearing. The load capacity of the tapered roller bearing can be remarkably increased as compared with the tapered roller bearing having.

  Further, according to the inner ring structure 10 of the above embodiment, the tapered roller 2 on the outer peripheral conical raceway surface 11 is made to be the above-described saddle surface by the roller pressing portion 31 of the jig 3 fixed to the screw hole 16 of the inner ring 1. 14, the tapered roller 2 can be held on the outer peripheral conical raceway surface 11 by the roller pressing portion 31 and the flange surface 14 regardless of the state of the inner ring 1 and the state where the cage is not present. Therefore, the outer ring 4 can be easily assembled to the inner ring structure 10.

  Further, according to the inner ring structure 10 of the above embodiment, after the outer ring 4 is assembled, it is possible to apply a preload while the tapered roller 2 is pressed against the flange 14 of the inner ring 1. After assembling the outer ring 4 on the basis of the body 10, it is possible to prevent the preload loss from occurring in the tapered roller bearing of the above-described embodiment in which the jig is removed.

  Further, according to the method of assembling the tapered roller bearing of the above-described embodiment, the tapered roller 2 on the outer peripheral conical raceway surface 11 is deformed by the roller pressing portion 31 of the jig 3 fixed to the screw hole 16 of the inner ring 1. Since the outer ring 4 is assembled in a state where it is pressed against the surface 14, the tapered roller 2 is positioned on the outer peripheral conical track of the inner ring 1 with the axial center of the inner ring 1 positioned in the vertical direction even in the absence of the cage. There is no separation from the surface 11. Therefore, the tapered roller bearing can be easily assembled.

  Further, according to the method of assembling the tapered roller bearing of the above embodiment, the preload can be applied while the tapered roller 2 is pressed against the flange 14 of the inner ring 1. Omission does not occur. Therefore, it is possible to prevent the preload loss from occurring in the tapered roller bearing according to the embodiment in which the jig 3 is removed after the outer ring 4 is assembled based on the inner ring structure 10.

  In the tapered roller bearing of the above embodiment, the tapered roller bearing is a so-called full roller tapered roller bearing. However, in this invention, the tapered roller bearing may have a cage.

  In the tapered roller bearing of the above embodiment, the tapered roller bearing does not have the jig 3. However, in the present invention, the tapered roller bearing has the roller pressing portion 31 of the jig 3 in the use state. The jig 3 may be provided as long as it is positioned at a distance from the tapered roller 2.

  That is, the tapered roller bearing of the present invention has the inner ring 1, the outer ring 4, the plurality of tapered rollers 2 and the jig 3 in use, the jig 3 is fixed to the inner ring 1, and the rollers of the jig 3 are used. A tapered roller bearing in which the pressing portion 31 is located at a distance from the tapered roller 2 may be used.

  In other words, the tapered roller bearing includes an inner ring 1, an outer ring 4, a plurality of tapered rollers 2, and the jig 3 described above, and the roller pressing portion 31 of the jig 3 contacts the tapered roller 2. A tapered roller bearing that can select a first state and a second state in which the roller pressing portion 31 of the jig 3 is positioned at an interval from the tapered roller 2 may be used.

  In the case of the tapered roller bearing of the modified example having the jig 3, if a coil spring 22 having a spring constant of a predetermined value or more is used, the roller pressing portion 31 of the jig 3 can be moved to the conical shape only by loosening the bolt 21. The roller 2 can be brought into a non-contact state, which is convenient.

  Further, in the case of the tapered roller bearing of the modified example having the jig 3, since the tapered roller does not fall from the inner ring even if the outer ring is removed only by tightening the bolt by a predetermined amount at the time of maintenance, the maintenance can be performed efficiently. Can do.

  Further, in the tapered roller bearing of the modified example having the inner ring structure 10 and the jig 3, the fastening member is composed only of the bolt 21, but the invention having the inner ring structure and the jig. In the tapered roller bearing of the modified example, the fastening member may include a nut.

  Moreover, in the tapered roller bearing of the modified example having the inner ring structure 10 and the jig 3, the biasing member is a coil spring, but the modified example of the present invention having the inner ring structure and the jig. In the tapered roller bearing, the urging member may be a disc spring, a square spring, a torsion spring, a tension spring, a conical spring, a ring spring, a spring with a metal fitting, and various crafted springs.

  Further, in the tapered roller bearing of the modified example having the inner ring structure 10 and the jig 3, the number of bolts 21, the number of through holes in the end face facing portion 20, and the number of screw holes 16 in the inner ring 1 are: Although it was the same number, it may be a different number. The number of bolts 21, the number of through holes in the end face facing portion 20, and the number of screw holes 16 in the inner ring 1 may be the same or different, but three or more bolts After 21 penetrates through the different through holes, it is preferable that the through holes are respectively screwed into the respective screw holes 16 at positions extending in the axial direction of the inner ring 1. However, when one bolt 21 penetrates through the through hole and is screwed into each screw hole 16 at a position where the through hole is extended in the axial direction of the inner ring 1, or two This does not exclude the case where the bolt 21 penetrates through different through holes and then is screwed into the screw holes 16 at the positions where the through holes are extended in the axial direction of the inner ring 1.

  Further, in the above assembling method of the tapered roller bearing, after the inner ring structure 10 is assembled and the tapered roller 2 is held on the outer peripheral conical raceway surface 11 of the inner race 1, the outer race 4 is changed to the small diameter of the conical raceway surface 18 of the outer race 4. With the side facing downward in the vertical direction, the main shaft was passed from above the vertical direction of the main shaft extending in the vertical direction, and the outer ring 4 was left still below the vertical direction of the main shaft.

  However, in the method for assembling the tapered roller bearing according to the present invention, the main shaft is viewed from above in the vertical direction of the main shaft extending in the vertical direction, with the outer ring facing the small diameter side of the conical raceway surface of the outer ring in the vertical direction. The inner ring structure may be assembled after the outer ring is allowed to stand under the vertical direction of the main shaft.

It is a schematic cross section of the axial direction of the inner ring structure of one embodiment of the present invention. It is a schematic cross section of the axial direction of the tapered roller bearing of one Embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 Inner ring 2 Conical roller 3 Jig 4 Outer ring 11 Outer periphery conical track surface 12 Large collar part 14 Collar surface 16 Screw hole 20 Press ring 21 Bolt 22 Coil spring 30 End surface opposing part 31 Roller press part

Claims (4)

An inner ring having an outer circumferential conical raceway surface and a flange surface located on the larger diameter side in the axial direction of the outer circumferential conical raceway surface;
An outer ring having an inner circumferential conical raceway surface;
A plurality of tapered rollers disposed between the outer peripheral conical raceway surface of the inner ring and the inner peripheral conical raceway surface of the outer ring;
The inner ring has a jig attaching portion for attaching a jig for pressing the tapered rollers on the outer peripheral conical raceway surface to the flange surface of the inner ring, and the inner ring ,
The peripheral conical two tapered rollers adjacent to each other in the circumferential direction of the raceway surface, tapered roller bearings, wherein contactable der Rukoto. The tapered roller bearing according to claim 1,
The tapered roller bearing according to claim 1, wherein the jig mounting portion is a screw hole that opens to an end surface on the small diameter side of the outer peripheral conical raceway surface in the axial direction of the inner ring. An inner ring having an outer circumferential conical raceway surface, a flange surface located on the larger diameter side in the axial direction of the outer circumferential cone raceway surface, and a screw hole opened on the end surface in the axial direction located on the smaller diameter side of the outer circumferential cone raceway surface When,
A plurality of tapered rollers located on the outer circumferential conical raceway surface;
A jig fixed to the inner ring,
Two tapered rollers adjacent in the circumferential direction of the inner ring can be contacted,
The jig is
In the state facing the end surface of the inner ring in the axial direction, the outer ring extends in a direction substantially parallel to the end surface of the inner ring, and has an end surface facing portion having a through hole, and the inner ring of the end surface facing portion. An annular pressing ring having a roller pressing portion that is continuous with the radially outer end and extends to the flange surface side in the axial direction and to the radially outer side;
A fastening member passing through the through hole of the end face facing portion and screwed into the screw hole of the inner ring;
A biasing member that biases both the end face of the inner ring and the end face facing portion in a direction in which the axial distance between the end face of the inner ring and the end face facing portion increases;
The inner ring structure, wherein the roller pressing portion of the pressing ring presses the plurality of tapered rollers on the outer peripheral conical raceway surface against the flange surface. An outer ring having an inner circumferential conical raceway surface is connected to a shaft extending in a substantially vertical direction so that the small diameter side of the inner circumferential conical raceway surface of the outer ring is below the vertical direction. Passing from the side, the outer ring is allowed to stand on the lower side in the vertical direction of the shaft,
The inner ring structure according to claim 3 is moved downward from the vertical direction of the shaft in the vertical direction with the end face of the inner ring of the inner ring structure facing downward in the vertical direction. The outer periphery of the shaft is fixed by being externally fitted by press-fitting,
Then, the outer ring is moved vertically upward and assembled to the tapered roller of the inner ring structure,
Then, the method of assembling the tapered roller bearing, wherein the roller pressing portion of the pressing ring of the inner ring structure is separated from the tapered roller.

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