JP2012072880A - Bearing unit, double row bearing unit and rotating shaft position adjusting method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing unit for finely adjusting the position and inclination of the rotating shaft, double-row-bearing unit, and its rotating shaft position adjustment method.SOLUTION: The bearing unit 101, 102 includes a self-aligning bearing 120 having a plurality of rolling elements 128, an inner race 126 which is integrated with a plurality of rolling elements 128 and into which a rotating shaft is inserted to the inside, an outer race 122 to support the inner race 126 through a plurality of rolling elements 128 and supports the inner race 126 tiltably to the central axis of the outer race 122, a ring member 140 which holds the side part 123a of the outer race 122 slidably by the curved face 142 in the end part 121a of the self-aligning bearing 120, and a slide adjust mechanism 160 which adjusts the slide amount of the side part 123a of the outer race 122 on the other end part 121b of the self-aligning bearing 120. A double row bearing unit 100 is equipped with the bearing unit 101, 102 in the longitudinal direction of the rotating shaft 50.

Description

  The present invention relates to a bearing device, a double row bearing device, and a rotation shaft position adjusting method thereof, and a bearing device capable of adjusting a center position of a rotating shaft of a rotating shaft, a double row bearing device including the same, and a rotating shaft position adjustment thereof. Regarding the method.

  Conventionally, when a screw hole is formed in a workpiece or the like, when there is an error in the center position of the hole on the workpiece side with respect to the rotation center on the tool rotation type machine tool side having a rotating shaft, An error may occur in the center position of the hole with respect to the rotation center.

  In view of this, an automatic alignment tool holder has been proposed that enables machining as it is even when an error occurs in the center position of the hole with respect to the rotation center in a work rotation type machine tool (for example, Patent Document 1).

JP 2008-44031 A

  However, the automatic alignment tool holder described in Patent Document 1 can automatically align (absorb) a minute axis deviation with the counterpart, but finely adjust the position of the rotation shaft of the rotation shaft to a predetermined position in advance. It is not possible to tilt the rotating shaft of the rotating shaft.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a bearing device, a double row bearing device, and a method for adjusting the position of the rotating shaft that can finely adjust the position and inclination of the rotating shaft of the rotating shaft.

  Another object of the present invention is to provide a rotary shaft position adjusting method for a double row bearing device that can finely adjust the position of the rotary shaft of the rotary shaft while holding the rotary shaft of the rotary shaft in parallel. To do.

  (1) A plurality of rolling elements (for example, a plurality of rolling elements 128 and 128a to be described later) and an inner ring (for example, an inner ring to be described later) that is an inner ring integral with the plurality of rolling elements and has a rotation shaft inserted therethrough. 126, 126a) and an outer ring that supports the inner ring through the plurality of rolling elements and supports the inner ring so as to be tiltable with respect to a central axis of the outer ring (for example, outer rings 122, 122a described later). A self-aligning bearing (e.g., self-aligning bearing 120 described later), and one end portion (e.g., one end portion 121a described later) of the self-aligning bearing, 123a) is held by a curved surface (for example, a curved surface 142 described later) so as to be slidable (for example, ring members 140 and 140a described later), and the other end portion (for example, the other end described later) of the self-aligning bearing. Part 121 ), A bearing device (for example, bearing devices 101 and 102 described later) provided with a sliding adjustment mechanism (for example, sliding adjustment mechanisms 160 and 160a described later) for adjusting the sliding amount of the side portion of the outer ring. .

  According to the invention described in (1), a ring member that slidably holds a side portion of the outer ring by a curved surface is provided at one end portion of the self-aligning bearing, and the outer ring side is provided at the other end portion of the self-aligning bearing. Since the sliding adjustment mechanism for adjusting the sliding amount of the portion is provided, the side portion of the outer ring can be slid on the curved surface independently of the direction of the rotation axis of the inner ring, that is, the supported rotating shaft. For this reason, since the center position of the inner ring can be moved in the radial direction of the inner ring in accordance with the inclination of the outer ring, the center position and the inclination of the rotating shaft of the supported rotating shaft can be finely adjusted.

  (2) A double-row bearing device (for example, a double-row bearing device 100, 100a, 100b described later) provided with at least two bearing devices according to (1) in the longitudinal direction of the rotary shaft, A double-row bearing device in which the rotating shaft of the rotating shaft is eccentric by adjusting the sliding amount of each side portion of the at least two self-aligning bearings by the sliding adjusting mechanism.

  According to the invention described in (2), the double row bearing device provided with at least two bearing devices in the longitudinal direction of the rotating shaft is provided on each side of at least two self-aligning bearings by at least two sliding adjustment mechanisms. By adjusting the sliding amount of the portion, the center position and the inclination of the rotation shaft of each of the at least two bearing devices can be finely adjusted individually, so that the rotation shaft of the rotation shaft can be eccentric.

  (3) A rotation shaft position adjusting method for the bearing device according to (1) or the double row bearing device according to (2), wherein the rotation shaft is adjusted by adjusting a sliding amount of the side portion by the sliding adjustment mechanism. A rotary shaft position adjustment method in which the rotary shaft is eccentric.

  According to invention of (3), there exists an effect similar to (1) and (2).

  ADVANTAGE OF THE INVENTION According to this invention, the rotating shaft position adjustment method of the bearing apparatus which can finely adjust the position and inclination of the rotating shaft of a rotating shaft, and a double row bearing apparatus can be provided.

  In addition, according to the present invention, it is possible to provide a rotation shaft position adjusting method for a double row bearing device that can finely adjust the position of the rotation shaft of the rotation shaft while holding the rotation shaft of the rotation shaft in parallel. .

It is a schematic sectional drawing of the double row bearing apparatus provided with two bearing apparatuses of 1st Embodiment which concerns on this invention. FIG. 2 is a detailed cross-sectional view of a double row bearing device including two bearing devices shown in FIG. 1. It is a schematic sectional drawing of the double row bearing apparatus provided with two bearing apparatuses of 2nd Embodiment which concerns on this invention. It is a schematic sectional drawing of the double row bearing apparatus provided with two bearing apparatuses of 3rd Embodiment which concerns on this invention. It is a schematic sectional drawing of the self-aligning roller bearing of the bearing apparatus of other embodiment which concerns on this invention. It is a schematic sectional drawing of the self-aligning roller bearing of the bearing apparatus of further another embodiment which concerns on this invention. It is a schematic sectional drawing which shows the state of alignment of the self-aligning roller bearing of the bearing apparatus of other embodiment shown in FIG.

  With reference to FIG.1 and FIG.2, the bearing apparatus 101,102 of 1st Embodiment, the double row bearing apparatus 100 provided with the same, and the rotating shaft position adjustment method of the double row bearing apparatus 100 are demonstrated. FIG. 1 is a schematic cross-sectional view of a double row bearing device including two bearing devices according to the first embodiment of the present invention. FIG. 2 is a detailed cross-sectional view of the double row bearing device including the two bearing devices shown in FIG.

  As shown in FIGS. 1 and 2, the double-row bearing device 100 includes a bearing device 101 and a bearing device 102. The bearing device 101 and the bearing device 102 are configured in the same manner, and a plurality of the bearing devices 101 and 102 are arranged along the longitudinal direction of the rotating shaft 50 to be supported, and the bearing device 101 and the bearing device 102 are arranged in line-symmetric positions with respect to each other. ing. Hereinafter, the bearing device 102 will be described, but the description of the bearing device 102 can be applied to the bearing device 101 as it is.

  The bearing device 102 includes a self-aligning bearing 120, a ring member 140, and a sliding adjustment mechanism 160 (see FIG. 2).

  The self-aligning bearing 120 includes an outer ring 122, an inner ring 126, and a plurality of rolling elements 128. The inner ring 126 is integral with the plurality of rolling elements 128, and the outer ring 122 supports the inner ring 126 via the plurality of rolling elements 128 and supports the inner ring 126 so as to be tiltable with respect to the central axis of the outer ring 122. Specifically, a plurality of rolling elements 128 are arranged between the outer ring 122 and the inner ring 126, and the plurality of rolling elements 128 are arranged so that the plurality of rolling elements 128 are not separated from the outer peripheral surface of the inner ring 126. It is arranged at equal intervals. Therefore, the inner ring 126 and the plurality of rolling elements 128 are integrally disposed on the inner peripheral surface side of the outer ring 122.

  The external appearance of the self-aligning bearing 120 has a substantially ring shape, and the end on which the self-aligning bearing 120 (for example, the bearing device 101 with respect to the bearing device 102) on which the self-aligning bearing 120 is arranged is arranged at one end 121a. The other side is the other end 121b.

  As shown in FIG. 1, the outer ring 122 has an inner peripheral surface 124 formed on a curved surface having a radius of curvature r centering on the center d of the outer ring 122. The inner ring 126 has a substantially cylindrical shape and is disposed inside the outer ring 122. A rotating shaft 50 (see FIG. 2) is fitted inside the inner ring 126. The corner portion 125 of the side portion 123a on the one end 121a side of the outer ring 122 is formed in an oblique curved surface so as to slide on the curved surface 142 formed in the ring member 140.

  As shown in FIG. 2, the bearing devices 101 and 102 constituting the double row bearing device 100 are respectively disposed in concave portions (large diameter portions) 162 formed at both ends of the frame M of the machine tool. The recess 162 has a size that accommodates the ring member 140 and the self-aligning bearing 120.

  Both the ring member 140 of the bearing device 101 and the ring member 140 of the bearing device 102 have a ring shape in which a through hole 144 is formed. Each of the ring member 140 of the bearing device 101 and the ring member 140 of the bearing device 102 has a corner portion 125 formed on a side portion 123a on the one end 121a side of the outer ring 122 of the self-aligning bearing 120 at the bottom of the recess 162. So that the curved surface 142 faces the opening of the recess 162. The center of the ring member 140 of the bearing device 101 and the center of the ring member 140 of the bearing device 102 form a ring center line C. The curvature radius of the curved surface 142 is preferably the same as the curvature radius of the corner portion 125 of the outer ring 122, and both the curved surface 142 and the corner portion 125 have a predetermined distance R from the point O on the ring center line C. A curved surface with a radius of curvature is preferred.

  As shown in FIG. 2, each of the sliding adjustment mechanisms 160 of the bearing device 101 and the bearing device 102 is provided in the concave portion 162, the lid portion 164 that covers the opening of the concave portion 162, and the lid portion 164. And a plurality of pressing portions 167 and 168 that are in contact with the side portion 123b on the end portion 121b side. The pressing parts 167 and 168 are, for example, screwing members such as bolts. When the pressing portions 167 and 168 are rotated, the pressing portions 167 and 168 are configured to press the outer ring 122 in the extending direction of the rotating shaft 50 according to the rotation. Each of the cover portions 164 of the bearing device 101 and the bearing device 102 has a convex shape, and has a through hole 165 at the center thereof so that the rotating shaft 50 extends.

  In this way, the sliding adjustment mechanism 160 sandwiches the self-aligning bearing 120 between the ring member 140 and the sliding adjustment mechanism 160, and the side portion 123a on the one end 121a side of the outer ring 122 of the self-aligning bearing 120. The outer ring 122 of the self-aligning bearing 120 is inclined with respect to the ring member 140 while sliding on the curved surface 142 of the ring member 140.

  The plurality of pressing portions are respectively screwed into a plurality of screw portions formed on the lid portion 164 around the through hole 165. In FIG. 2, only the pressing portions 167 and 168 that face each other with the through-hole 165 interposed therebetween are shown, but for example, the plurality of pressing portions are arranged at intervals of 90 degrees around the through-hole 165. Good. The plurality of pressing portions are all provided on the lid portion 164 so that the pressing force pressing the side portion 123b on the other end 121b side of the outer ring 122 becomes a predetermined pressing force. Since the plurality of pressing parts are arranged at intervals of 90 degrees, the outer ring 122 is moved forward by moving one of the pair of pressing parts in a symmetrical position with respect to the through hole 165 and moving the other backward. Can be tilted in any direction.

  With reference to FIG. 2, the rotation shaft position adjusting method in the bearing devices 101 and 102 and the double row bearing device 100 will be described. As shown in FIG. 2, in the initial state, the rotation shaft C <b> 1 of the rotation shaft 50 supported on the inner ring 126 of each of the bearing devices 101 and 102 includes the shaft center of the ring member 140 of the bearing device 101 and the bearing device 102. It is assumed that the ring member 140 is in a state coincident with the ring center line C connecting the axial centers of the ring members 140.

  Next, the rotation axis C1 of the rotation shaft 50 is finely adjusted. First, in order to incline the rotating shaft 50, the pressing portion 167 of one bearing device 102 is loosened, the pressing portion 168 of the bearing device 102 is tightened, and the outer ring 122 of the bearing device 102 is fixed to the curved surface 142 of the ring member 140 in a predetermined manner. Slide only the sliding amount. That is, when the pressing portion 167 of the bearing device 102 and the pressing portion 168 of the bearing device 102 are rotated in opposite directions, the pressing portion 167 of the bearing device 102 moves backward, and the pressing portion 168 of the bearing device 102 moves forward. The outer ring 122 of the bearing device 102 is tilted while one side portion 123a of the outer ring 122 of the bearing device 102 slides upward on the curved surface 142 in FIG.

  At this time, the outer ring 122 of the bearing device 102 rotates around the point O on the ring center line C by an angle θ counterclockwise in FIG. This angle θ is adjusted by the amount of rotation of the pressing portion 167 and the pressing portion 168 of the bearing device 102. The inner ring 126 of the bearing device 102 hardly rotates with respect to the ring member 140 of the bearing device 102 because the rotating shaft 50 is inserted therethrough. For this reason, the inner ring 126 of the bearing device 102 rotates relative to the outer ring 122 of the bearing device 102 around the center d of the outer ring 122 of the bearing device 102. When the outer ring 122 of the bearing device 102 rotates about the point O on the ring center line C by an angle θ, the center d of the outer ring 122 of the bearing device 102 (which is also the rotation center of the inner ring 126) is a distance upward in FIG. Move by δ. For this reason, the rotating shaft C1 of the rotating shaft 50 on the side inserted through the inner ring 126 of the bearing device 102 moves upward by a distance δ in FIG.

  That is, the rotation axis C1 of the rotation shaft 50 on the bearing device 102 side can be moved in the predetermined direction by the distance δ while maintaining the position of the rotation axis C1 of the rotation shaft 50 on the bearing device 101 side in the initial state. . Therefore, the inclination of the rotation axis C1 of the rotation shaft 50 can be finely adjusted by a predetermined angle with respect to the ring center line C with the bearing device 101 as the center.

  In order to make the rotation axis C1 of the rotation shaft 50 parallel to the ring center line C, similarly, the pressing portion 167 of the other bearing device 101 is loosened, the pressing portion 168 of the bearing device 101 is tightened, and the outer ring of the bearing device 101 is tightened. 122 is slid on the curved surface 142 of the ring member 140 by a predetermined sliding amount. That is, when the pressing portion 167 of the bearing device 101 and the pressing portion 168 of the bearing device 101 are rotated in opposite directions, the pressing portion 167 of the bearing device 101 moves backward and the pressing portion 168 moves forward. The outer ring 122 tilts while one side 123a of the outer ring 122 of the bearing device 102 slides on the curved surface 142 upward in FIG.

  At this time, the outer ring 122 of the bearing device 101 similarly rotates about the point O (not shown) on the ring center line C by an angle θ in the clockwise direction in FIG. This angle θ is adjusted by the amount of rotation of the pressing portion 167 and the pressing portion 168 of the bearing device 101. The inner ring 126 of the bearing device 101 hardly rotates with respect to the ring member 140 of the bearing device 101 because the rotating shaft 50 is inserted therethrough. Therefore, the inner ring 126 of the bearing device 101 rotates around the center of the outer ring 122 of the bearing device 101 with respect to the outer ring 122 of the bearing device 101. When the outer ring 122 of the bearing device 101 rotates about the above-described point O (not shown) on the ring center line C by an angle θ, the center d (which is also the center of the inner ring 126) of the outer ring 122 of the bearing device 101 is illustrated. Similarly, in FIG. For this reason, the rotation axis C1 of the rotary shaft 50 on the side inserted through the inner ring 126 of the bearing device 101 similarly moves upward by a distance δ in FIG.

  That is, the rotation axis C1 of the rotation shaft 50 on the bearing device 101 side can be moved by a distance δ in a predetermined direction while maintaining the position of the rotation axis C1 of the rotation shaft 50 on the bearing device 102 side. Therefore, the rotation axis C1 of the rotation shaft 50 can be finely adjusted by a predetermined angle with respect to the ring center line C with the bearing device 102 as the center.

  Then, the moving direction and moving distance δ of the rotating shaft C1 of the rotating shaft 50 on the bearing device 101 side are made to coincide with the moving direction and moving distance δ of the rotating shaft C1 of the rotating shaft 50 on the bearing device 102 side. 50 rotational axes C1 can be translated from the ring center line C by a distance δ.

  According to the bearing devices 101 and 102 and the double-row bearing device 100 including the bearing devices 101 and 102, the position and inclination of the rotation axis C1 of the rotation shaft 50 can be finely adjusted. Further, according to the rotating shaft position adjusting method of the double row bearing device 100, the position of the rotating shaft C1 of the rotating shaft 50 is finely adjusted while keeping the rotating shaft C1 of the rotating shaft 50 parallel to the ring center line C. Can do.

  With reference to FIG. 3, the double-row bearing apparatus 100a of 2nd Embodiment is demonstrated. FIG. 3 is a schematic cross-sectional view of a double row bearing device including two bearing devices according to the second embodiment of the present invention.

  The double row bearing device 100a includes a pair of sliding adjustments of the pair of bearing devices 101a and 102a instead of the respective lid portions 164 of the sliding adjustment mechanisms 160 and 160 of the pair of bearing devices 101 and 102 of the double row bearing device 100. The lid portions 164a of the mechanisms 160a and 160a are provided. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  Each lid portion 164a of the bearing device 101a and the bearing device 102a has a through hole 165. A plurality of convex pressing portions 167a and 168a having different lengths are formed around the tip of the convex portion of the lid portion 164a. In FIG. 3, only the pressing portions 167 a and 168 a that face each other with the through-hole 165 interposed therebetween are illustrated, but for example, the plurality of pressing portions are arranged at intervals of 90 degrees around the through-hole 165. . And the length of the front-end | tip of a some press part is made into length that the front-end | tip of a some press part is located on a predetermined plane. For this reason, the inclination direction of the outer ring 122 can be changed by changing the mounting direction of the sliding adjustment mechanism 160a.

  For this reason, when the lid portion 164a of the bearing device 101a is attached to the recess 162 of the bearing device 101a, the pressing portion 167a of the bearing device 101a slightly pushes the side portion 123b of the other end 121b of the outer ring 122 of the bearing device 101a. Since the pressing portion 168a of 101a pushes the side portion 123b of the other end 121b of the outer ring 122 of the bearing device 101a many times, the outer ring 122 of the bearing device 101a has one side portion 123a of the outer ring 122 of the bearing device 101a on the curved surface 142. Tilt while sliding.

  Further, when the lid portion 164a of the bearing device 102a is fitted into the recess 162 of the bearing device 102a, the pressing portion 167a of the bearing device 102a slightly pushes the side portion 123b of the other end 121b of the outer ring 122 of the bearing device 102a. Since the pressing portion 168a of 102a pushes the side portion 123b of the other end 121b of the outer ring 122 of the bearing device 102a many times, the outer ring 122 of the bearing device 102a has one side portion 123b of the outer ring 122 of the bearing device 102a on the curved surface 142. Tilt while sliding.

  Then, the outer ring 122 of the bearing device 101a and the bearing device 102a has one point O (the right point O in FIG. 3) and the other point O (the left point O in FIG. 3) on the ring center line C, respectively. 3 is rotated counterclockwise and clockwise in FIG. 3 by an angle θ. This angle θ is determined by the protruding amounts of the pressing portions 167a and 168a of the bearing device 101a and the bearing device 101b. The inner rings 126 of the bearing device 101a and the bearing device 102a are hardly rotated with respect to the ring members 140 of the bearing device 101a and the bearing device 102a because the rotation shaft 50 is inserted therethrough. Therefore, the bearing device 101a and the inner ring 126 of the bearing device 102a rotate relative to the outer ring 122 of the bearing device 101a and the bearing device 102a, respectively, around the center d of the outer ring 122 of the bearing device 101a and the bearing device 102a. To do. When the outer ring 122 of the bearing device 101a and the bearing device 102a rotate by an angle θ around the one point O and the other point O on the ring center line C, respectively, the bearing device 101a and the outer ring 122 of the bearing device 102a The center d (also the center of rotation of the inner ring 126) moves upward by a distance δ in FIG. For this reason, the rotation axis C1 of the rotary shaft 50 on the side inserted through the inner ring 126 of each of the bearing device 101a and the bearing device 102a moves upward by a distance δ in FIG.

  With reference to FIG. 4, the double row bearing device 100b provided with the two bearing devices of the third embodiment will be described. FIG. 4 is a schematic cross-sectional view of a double row bearing device including two bearing devices according to the third embodiment of the present invention.

  The double row bearing device 100b is provided with a ring member 140a in place of the ring member 140 of the double row bearing device 100 in the first and second embodiments. Therefore, the same components as those in the first embodiment and the second embodiment are denoted by the same reference numerals and description thereof is omitted.

  The ring member 140a has a ring shape with a circular cross section. Therefore, the ring member 140a has a convex curved surface. The ring member 140 a is disposed at the bottom of the recess 162.

  Since the cross section of the ring member 140a is a circular ring shape and has a convex curved surface, the ring member 140a slides in a point contact with the corner portion 125 of the side portion 123a of the one end portion 121a of the outer ring 122. For this reason, since the friction between the ring member 140a and the corner | angular part 125 which arises when inclining the outer ring | wheel 122 is small, the rotating shaft C1 of the rotating shaft 50 can be finely adjusted with little force.

  Although the above double row bearing devices 100, 100a, 100b used self-aligning ball bearings as the self-aligning bearing 120, the present invention is not limited thereto, and as shown in FIG. 5, an outer ring 122a, an inner ring 126a, A self-aligning roller bearing 120a including a plurality of cylindrical rolling elements 128a may be used.

  In addition, the double row bearing devices 100, 100a, 100b have one self-aligning bearing 120 and one self-aligning roller bearing 120a, but the present invention is not limited to this, and as shown in FIGS. A plurality of self-aligning bearings 120 and a plurality of self-aligning roller bearings 120a may be used.

  FIG. 6 is a schematic sectional view of a self-aligning roller bearing of a bearing device according to still another embodiment of the present invention. FIG. 7 is a schematic cross-sectional view showing the alignment state of the self-aligning roller bearing of the bearing device of another embodiment shown in FIG.

  As shown in FIG. 6, each of the plurality of spherical roller bearings 120a includes an outer ring 122a, an inner ring 126a, and a plurality of cylindrical rolling elements 128a. The inner ring 126a of each of the plurality of spherical roller bearings 120a is in contact with the outer ring 122a and inner ring 126a of one of the spherical roller bearings 120a and the outer ring 122a and inner ring 126a of the other spherical roller bearing 120a. Thus, the rotation shaft 50 is inserted.

  In the initial state, the rotation axis C1 of the rotation shaft 50 supported on the inner ring 126a of each of the plurality of spherical roller bearings 120a is in a state coincident with the ring center line C passing through the center axis of the ring member 140. To do.

  Next, the rotation axis C1 of the rotation shaft 50 is finely adjusted. As shown in FIG. 7, in order to incline the rotary shaft 50, the outer ring 122 a of the right self-aligning roller bearing 120 a in FIG. 7 is slid on the curved surface 142 of the ring member 140 by a predetermined sliding amount. Accordingly, the outer ring 122a of the right spherical roller bearing 120a on the right side in FIG. 7 is tilted while sliding on the curved surface 142 upward in FIG.

  In FIG. 7, since the outer ring 122a of the left self-aligning roller bearing 120a is in contact with the outer ring 122a of the right self-aligning roller bearing 120a, it corresponds to the inclination of the outer ring 122a of the right self-aligning roller bearing 120a. While the outer ring 122a of the right spherical roller bearing 120a and the outer ring 122a of the left spherical roller bearing 120a slide in the radial direction of the outer ring 122a, the outer ring 122a of the left spherical roller bearing 120a also tilts. .

  At this time, the inner ring 126 of both the self-aligning roller bearings 120a in FIG. 7 hardly rotates with respect to the ring member 140 because the rotary shaft 50 is inserted. Therefore, the center of the outer ring 122a (which is also the center of rotation of the inner ring 126a) of both the self-aligning roller bearings 120a is similarly moved upward by a distance δ in FIG. For this reason, the rotating shaft C1 of the rotating shaft 50 inserted through the inner ring 126a of the plurality of spherical roller bearings 120a moves upward by a distance δ in FIG.

  As mentioned above, although demonstrated using embodiment of this invention, the technical scope of this invention is not limited to the range as described in the said embodiment. Various changes or improvements can be added to the above-described embodiment, and forms with such changes or improvements can also be included in the technical scope of the present invention.

50 Rotating shaft 100, 100a, 100b Double row bearing device 101, 102, 101a, 102a, 101b, 102b Bearing device 120 Self-aligning bearing 122, 122a Outer ring 123a One side surface 123b of outer ring Other side portion 124 of outer ring Inner surface 125 Outer ring corners 126, 126a Inner rings 128, 128a Rolling elements 140, 140a Ring member 142 Curved surface 160, 160a Sliding tilt mechanism 162 Recess 164, 164a Lid 165 Through-holes 167, 167a Pressing parts 168, 168a Pressing Part C Ring center line C1 Rotating shaft of rotating shaft

Claims (3)

A plurality of rolling elements, an inner ring that is integral with the plurality of rolling elements and having a rotation shaft inserted through a central axis thereof, and an outer ring that supports the inner ring via the plurality of rolling elements. A self-aligning bearing having an outer ring that is tiltably supported with respect to the central axis of the outer ring,
A ring member that slidably holds a side portion of the outer ring with a curved surface at one end portion of the self-aligning bearing, and a sliding amount of the side portion of the outer ring adjusted at the other end portion of the self-aligning bearing And a sliding adjustment mechanism.   A double row bearing device comprising at least two bearing devices according to claim 1 in the longitudinal direction of the rotary shaft, each side of at least two self-aligning bearings by at least two sliding adjustment mechanisms. A double-row bearing device in which the rotating shaft of the rotating shaft is eccentric by adjusting the sliding amount of the portion.   The rotary shaft position adjusting method of the bearing device according to claim 1 or the double row bearing device according to claim 2, wherein the rotating shaft of the rotating shaft is adjusted by adjusting a sliding amount of the side portion by the sliding adjusting mechanism. A method for adjusting the position of the rotating shaft that is eccentric.

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