JP2008164138A - Rolling bearing device having fixing structure with slit fastening - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device suitable for preventing an error in detecting a resolver when a radial load is applied to the rolling bearing device. <P>SOLUTION: An inner ring slit fastened member 102a having a slit 104a is fitted in the inner peripheral face of an inner ring 14a, the inner ring slit fastened member 102a is slit fastened so that the outer diameter of the inner ring slit fastened member 102 is enlarged, and the inner ring slit fastened member 102a is faucet-fitted thereto with an housing inner 22 and an inner ring retainer 26. Outer ring slit fastened members 102b, 102c are fitted in the outer peripheral face of an outer ring 14b, the outer ring slit fastened members 102b, 102c are slit fastened so that the inner diameters of the outer ring slit fastened members 102b, 102c are reduced, and the outer ring slit fastened members 102b, 102c are faucet-fitted therein with a rotor 12 and an outer ring retainer 28. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rolling bearing device including a rolling bearing and a resolver, and particularly has a fixing structure by split tightening suitable for preventing erroneous detection of the resolver when a radial load is applied to the rolling bearing device. The present invention relates to a rolling bearing device.

Conventionally, a rolling bearing device including a rolling bearing and a resolver is known as a rolling bearing device.
FIG. 6 is a sectional view in the axial direction of a conventional rolling bearing device.
As shown in FIG. 6, the rolling bearing device 200 rotatably supports the rotor 12 by being interposed between a housing inner 22 that is a stator, a rotor 12 that is a rotor, and the rotor 12 and the housing inner 22. And a cross roller bearing 14.

  The cross roller bearing 14 has an inner ring 14a and an outer ring 14b. The inner ring 14 a is fitted to the outer peripheral surface of the housing inner 22 and is fixed to the housing inner 22 in a state where it is pressed in the axial direction by the inner ring presser 26. The outer ring 14 b is fitted to the inner peripheral surface of the rotor 12 and is fixed to the rotor 12 while being pressed in the axial direction by the outer ring presser 28. Here, the fitting between the housing inner 22 and the inner ring 14 a and the fitting between the rotor 12 and the outer ring 14 b are set so as not to apply stress to the cross roller bearing 14.

A resolver 30 for detecting the rotation angle of the rotor 12 is provided between the rotor 12 and the housing inner 22.
The resolver 30 is disposed so as to be opposed to the resolver rotor 18 at a predetermined interval with an annular resolver rotor 18 having an inner periphery that is eccentric with respect to the axis of the cross roller bearing 14, and the reluctance between the resolver rotor 18 and the resolver rotor 18. And a position detector 20 for detecting a change. The resolver rotor 18 is integrally attached to the inner peripheral surface of the rotor 12, and the position detector 20 is integrally attached to the outer peripheral surface of the housing inner 22. By resolving the resolver rotor 18 eccentrically and changing the distance between the resolver rotor 18 and the position detector 20 in the circumferential direction, the reluctance changes according to the position of the resolver rotor 18. Therefore, since the fundamental wave component of the reluctance change per rotation of the rotor 12 is one cycle, the resolver 30 outputs a resolver signal that changes according to the rotation angle position of the rotor 12.

For example, a bearing device described in Patent Document 1 is known as a rolling bearing device that applies an axial preload to fix the inner ring 14a and the outer ring 14b.
JP 2005-69252 A

  However, in the conventional rolling bearing device 200, the inner ring 14a and the outer ring 14b are fixed by applying a preload in the axial direction, but the inner ring 14a and the outer ring 14b are fitted in the radial direction by fitting with a clearance. Since the structure is fixed, when a radial load is applied to the rolling bearing device 200, the distance between the housing inner 22 and the inner ring 14a is the gap, and the distance between the rotor 12 and the outer ring 14b is the gap. And the gap of the resolver 30 changes accordingly. Therefore, there has been a problem that the rotational angle position of the rotor 12 cannot be accurately detected.

Further, in this case, since the internal preload is applied to the cross roller bearing 14, shrink fitting cannot be performed.
Therefore, the present invention has been made paying attention to such an unsolved problem of the conventional technology, and prevents a misdetection of the resolver when a radial load is applied to the rolling bearing device. An object of the present invention is to provide a rolling bearing device having a fixing structure by split tightening suitable for the above.

  [Invention 1] In order to achieve the above object, a rolling bearing device having a fixing structure by split tightening according to Invention 1 is fitted to a rolling bearing having an inner ring and an outer ring, and an inner peripheral surface of the inner ring and supported by the inner ring. An inner ring supported body, an outer ring supported body that is fitted to the outer peripheral surface of the outer ring and supported by the outer ring, an inner ring presser that fixes the inner ring while being pressed in the axial direction, and the inner ring supported body And a resolver in which the reluctance between the outer ring supported body and the outer ring supported body varies depending on the relative position thereof, a split member having at least one discontinuous portion on the circumference is provided on the inner circumferential surface of the inner ring. The claw member was claw-tightened so that the outer diameter of the crevice member was expanded, and the claw member was inlay-fitted by the inner ring supported body and the inner ring presser.

With such a configuration, the inner ring supported body and the outer ring supported body are relatively rotatably supported by the rolling bearing.
When a radial load is applied to the rolling bearing device, a cleaving member that is cleaved so that the outer diameter is enlarged and that is restricted from moving in the radial direction by a spigot fitting is fitted to the inner peripheral surface of the inner ring. Therefore, the change in the distance between the inner ring supported body and the inner ring is suppressed. Moreover, since the cleaving member has the characteristic of following the mating member, deformation of the inner ring is suppressed.

  Here, the inner ring supported body and the outer ring supported body only need to be relatively rotatably supported by the rolling bearing, and the inner ring supported body is fixed and the outer ring supported body is rotatably supported. Alternatively, the outer ring supported body may be fixed and the inner ring supported body may be rotatably supported, or both may be rotatably supported. Hereinafter, the same applies to the rolling bearing device having the fixing structure by split tightening according to the third aspect.

[Invention 2] Furthermore, the rolling bearing device having a fixing structure by split tightening according to Invention 2 is the rolling bearing device having the fixing structure by split tightening according to Invention 1, wherein the split member includes the inner ring supported body and the inner ring. It is fixed in the axial direction integrally with the presser foot.
With such a configuration, since the split member is axially fixed integrally with the inner ring supported body and the inner ring presser, a high frictional force is obtained, and the distance between the inner ring supported body and the inner ring changes. This is further suppressed.

  [Invention 3] Further, the rolling bearing device having a fixing structure by split tightening according to Invention 3 includes a rolling bearing having an inner ring and an outer ring, and an inner ring supported body that is fitted to the inner peripheral surface of the inner ring and supported by the inner ring. An outer ring supported body that is fitted to the outer peripheral surface of the outer ring and supported by the outer ring, an outer ring presser that fixes the outer ring while being pressed in the axial direction, the inner ring supported body, and the outer ring supported body And a resolver in which the reluctance between them varies depending on their relative position, a split member having at least one discontinuous portion on the circumference is fitted to the outer peripheral surface of the outer ring, The split member is split and tightened so that the inner diameter of the member is reduced, and the split member is inlay-fitted by the outer ring supported body and the outer ring presser.

With such a configuration, the inner ring supported body and the outer ring supported body are relatively rotatably supported by the rolling bearing.
When a radial load is applied to the rolling bearing device, the split member that is split so that the inner diameter is reduced and the movement in the radial direction is constrained by inlay fitting is fitted to the outer peripheral surface of the outer ring. A change in the distance between the outer ring supported body and the outer ring is suppressed. Further, since the split member has a characteristic of following the counterpart member, the outer ring is suppressed from being deformed.

[Invention 4] Further, the rolling bearing device having the fixing structure by split tightening according to the invention 4 is the rolling bearing device having the fixing structure by split tightening according to the invention 3, wherein the split member includes the outer ring supported body and the outer ring. It is fixed in the axial direction integrally with the presser foot.
With such a configuration, since the split member is axially fixed integrally with the outer ring supported body and the outer ring presser, a high frictional force is obtained, and the distance between the outer ring supported body and the outer ring changes. This is further suppressed.

  [Invention 5] Further, the rolling bearing device having the fixing structure by split tightening according to the invention 5 is the rolling bearing device having the fixing structure by split tightening according to any one of the first and second aspects. Is formed as a slit having a taper screw hole whose diameter is increased on the inner side in the radial direction, and the cleaving member is cleaved by a taper screw from the inner peripheral surface side of the cleaving member through the taper screw hole.

  With such a configuration, the cleaving member can be cleaved with a taper screw through a taper screw hole from the inner peripheral surface side of the cleaving member, so that cleaving is easy when fitting the capping member to the inner ring. Can be done. Since the cleaving member has a taper screw hole whose diameter increases on the inside in the radial direction, the outer diameter increases by insertion of the taper screw, and the cleaving member is tightened.

  [Invention 6] Further, the rolling bearing device having a fixing structure by split tightening according to Invention 6 is the rolling bearing device having the fixing structure by split tightening according to any one of Inventions 1 to 5, wherein the resolver has an inner periphery and an outer periphery. Each of which is eccentric with respect to the axis of the rolling bearing, and a detecting means for detecting a change in reluctance between the detected body and an inner circumference of the detected body The detected body is provided on one of the inner ring supported body and the outer ring supported body, and the detecting means is provided on the other side so that the eccentric side of the outer periphery faces the detecting means.

With such a configuration, when the inner ring supported body and the outer ring supported body are relatively rotated, the detection means and the detected body are also relatively rotated. And since the side which opposes a detection means is eccentric among the inner periphery and outer periphery of a to-be-detected body, a reluctance change arises by rotation and the reluctance change is detected by a detection means.
As described above, in the type of resolver in which the fundamental wave component of the reluctance change per rotation is one cycle, the influence of the gap change due to the load is large. Therefore, the suppression of the gap change is effective in preventing erroneous detection.

  Here, regarding the detected body and the detecting means, the detected body may be provided on the inner ring supported body, and the detecting means may be provided on the outer ring supported body, or vice versa. In the former case, the detected object and the detecting means are provided by decentering the outer periphery of the detected object and causing the outer periphery of the detected object to face the detecting means. In the latter case, the detected object and the detecting means are provided by decentering the inner periphery of the detected object and making the inner periphery of the detected object face the detecting means.

  As described above, according to the rolling bearing device having the fixing structure by split tightening according to the first aspect of the present invention, even when a radial load is applied to the rolling bearing device, the inner ring supported body and the inner ring are less than the conventional one. Therefore, it is possible to suppress the change in the resolver gap due to the load, and to reduce the possibility that the resolver erroneously detects. Moreover, the effect that the deformation | transformation of an inner ring | wheel can be suppressed is also acquired. Furthermore, since the inner ring supported body and the inner ring can be disassembled, an effect that the maintainability can be improved is also obtained.

Furthermore, according to the rolling bearing device having a fixing structure by split tightening according to the second aspect, the distance between the inner ring supported body and the inner ring is further suppressed, so that the possibility of erroneous detection by the resolver is further reduced. The effect that it can do is acquired.
Further, according to the rolling bearing device having the fixing structure by split tightening according to the third aspect, even when a radial load is applied to the rolling bearing device, the distance between the outer ring supported body and the outer ring is changed as compared with the related art. Therefore, it is possible to suppress the change in the resolver gap due to the load, and to reduce the possibility that the resolver erroneously detects. Moreover, the effect that the deformation | transformation of an outer ring | wheel can be suppressed is also acquired. Furthermore, since the outer ring supported body and the outer ring can be disassembled, an effect that the maintainability can be improved is also obtained.

Furthermore, according to the rolling bearing device having the fixing structure by split tightening according to the fourth aspect of the present invention, the distance between the outer ring supported body and the outer ring is further suppressed, so that the possibility of erroneous detection by the resolver is further reduced. The effect that it can do is acquired.
Furthermore, according to the rolling bearing device having the fixing structure by split tightening according to the fifth aspect of the present invention, the split member can be split and tightened by the taper screw through the taper screw hole from the inner peripheral surface side of the split member. The effect of being able to easily perform the claw tightening is obtained when fitting to.

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are views showing an embodiment of a rolling bearing device having a fixing structure by split tightening according to the present invention.
First, the configuration of a direct drive motor to which the present invention is applied will be described.
FIG. 1 is a sectional view of the direct drive motor 100 in the axial direction.
As shown in FIG. 1, the direct drive motor 100 includes a hollow housing inner 22 that is a stator, a rotor 12 that is a rotor, and a rotor 12 that is interposed between the rotor 12 and the housing inner 22 so that the rotor 12 can rotate. And a cross roller bearing 14 to be supported.

Between the rotor 12 and the housing inner 22, a coil 16 that applies rotational torque to the rotor 12 and a resolver 30 for detecting the rotational angle of the rotor 12 are provided.
The resolver 30 is disposed so as to be opposed to the resolver rotor 18 at a predetermined interval with an annular resolver rotor 18 having an inner periphery that is eccentric with respect to the axis of the cross roller bearing 14, and the reluctance between the resolver rotor 18 and the resolver rotor 18. And a position detector 20 for detecting a change. The resolver rotor 18 is integrally attached to the inner peripheral surface of the rotor 12 by bolts 18a, and the position detector 20 is integrally attached to the outer peripheral surface of the housing inner 22 by bolts 20a. By resolving the resolver rotor 18 eccentrically and changing the distance between the resolver rotor 18 and the position detector 20 in the circumferential direction, the reluctance changes according to the position of the resolver rotor 18. Therefore, since the fundamental wave component of the reluctance change per rotation of the rotor 12 is one cycle, the resolver 30 outputs a resolver signal that changes according to the rotation angle position of the rotor 12.

When the coil 16 is energized, the rotor 12 and the resolver rotor 18 rotate together, the position detector 20 detects a change in reactance, and the controller (not shown) controls the rotational speed and positioning. It has become.
In the present embodiment, the outer rotor type in which the outer side of the motor rotates is described, but there is no problem even if it is adopted in the inner rotor type in which the inner side of the motor rotates. Since the direct drive motor 100 has the same well-known configuration as the conventional direct drive motor except for the bearing components, the bearing configuration which is a characteristic part of the present invention will be described below. The configuration excluding the bearing component of the direct drive motor 100 is not particularly limited to the illustrated example, and other well-known configurations can be appropriately modified within the scope of the present invention.

The cross roller bearing 14 includes an inner ring 14a, an outer ring 14b, and a plurality of cross rollers (rollers) 14c provided so as to be able to roll between the inner ring 14a and the outer ring 14b. The cross roller 14c has a substantially cylindrical shape whose diameter is slightly larger than the length, and the even-numbered rotation shaft on the track and the odd-numbered rotation shaft on the track are inclined by 90 °.
FIG. 2 is a sectional view of the direct drive motor 100 in the radial direction.

FIG. 3 is a cross-sectional view in the axial direction along the line AA ′ in FIG. 2.
4 is a cross-sectional view in the axial direction along the line BB ′ of FIG.
As shown in FIG. 2, an annular inner ring splitting member 102a is fitted on the inner peripheral surface of the inner ring 14a.
The inner ring splitting member 102a is formed with a crack 104a as a discontinuous portion on the circumference. A screw hole 106a (female screw) is formed on the outer peripheral surface of the inner ring splitting member 102a so as to reach the scraper 104a at an angle orthogonal to the surface of the scraper 104a. The inner ring splitting member 102a is tightened so as to increase the outer diameter and is brought into close contact with the inner ring 14a by screwing the push screw 108a into the screw hole 106a to widen the interval of the scraping 104a.

As shown in FIGS. 3 and 4, a flange 22 a protruding radially outward is formed on the outer peripheral surface of the housing inner 22. The inner ring 14 a and the inner ring splitting member 102 a are fitted to the outer peripheral surface of the housing inner 22 with the lower surface of the inner ring 14 a in contact with the flange 22 a.
On the inner peripheral surface side of the lower surface of the inner ring retainer 26 and the inner peripheral surface side of the upper surface of the housing inner 22, convex step portions 98a and 100a for engaging with the inner ring splitting member 102a are formed protruding in the axial direction. ing. Then, the pressing portion 26b of the inner ring retainer 26 is brought into contact with the upper surface of the inner ring 14a, and the inner ring retainer 26 is fastened to the inner ring splitting member 102a and the housing inner 22 with a bolt 26a. As a result, the inner ring splitting member 102a is inlay-fitted by the convex steps 98a and 100a to restrain the radial movement, and is fixed in the axial direction integrally with the housing inner 22 and the inner ring presser 26. High frictional force can be obtained. Therefore, the inner ring 14a is also fixed in the axial direction by the inner ring splitting member 102a while being pressed against the housing inner 22 by the inner ring retainer 26 in the axial direction. Further, since the inner ring splitting member 102a has a characteristic that follows the mating member, the inner ring 14a is prevented from being deformed even when it is tightened.

On the other hand, on the inner peripheral surface of the outer ring 14b, as shown in FIG. 2, the outer ring splitting member 102b, which is a semicircular arc-shaped annular member, and the semicircular arc-shaped member that is connected to the outer ring splitting member 102b are tightened. An outer ring splitting member 102c which is an annular member is fitted.
A screw hole 106c (through hole) that reaches the end 104c at an angle orthogonal to the surface of the end 104c of the outer ring splitting member 102c is formed on the outer peripheral surface of the outer ring splitting member 102c. A screw hole 106b (female screw) that is continuous with the screw hole 106c is formed at the end 104b of the outer ring splitting member 102b that faces 104c. Similarly, screw holes 106b and 106c are formed at the opposite ends of the outer ring splitting members 102b and 102c. Then, the outer ring splitting members 102b and 102c are split and tightened so that the inner diameter is reduced by screwing the split bolts 108b into the screw holes 106c and 106b to reduce the distance between the outer ring splitting members 102b and 102c. In close contact with the outer ring 14b.

As shown in FIGS. 3 and 4, a flange 12 a that protrudes radially inward is formed on the inner peripheral surface of the rotor 12. The lower surface of the outer ring 14 b is brought into contact with the flange 12 a and the outer ring 14 b and the outer ring splitting members 102 b and 102 c are fitted to the inner peripheral surface of the rotor 12.
On the outer peripheral surface side of the lower surface of the outer ring retainer 28 and the outer peripheral surface side of the upper surface of the rotor 12, convex step portions 98 b and 100 b for engaging with outer ring splitting members 102 b and 102 c are formed protruding in the axial direction. Yes. Then, the pressing portion 28b of the outer ring retainer 28 is brought into contact with the upper surface of the outer ring 14b, and the outer ring retainer 28 is fastened to the outer ring splitting members 102b and 102c and the rotor 12 with bolts 28a. Accordingly, the outer ring splitting members 102b and 102c are inlay-fitted by the convex steps 98b and 100b to restrain the radial movement, and are fixed in the axial direction integrally with the rotor 12 and the outer ring presser 28. High frictional force can be obtained. Accordingly, the outer ring 14b is also fixed in the axial direction by the outer ring clamping members 102b and 102c while being pressed against the rotor 12 in the axial direction by the outer ring presser 28. Moreover, since the outer ring splitting members 102b and 102c have the characteristic of following the mating member, the outer ring 14b is prevented from being deformed even if it is split.

  The inner ring splitting member 102a and the outer ring splitting members 102b and 102c can be attached by fitting the inner ring splitting member 102a to the inner ring 14a and the outer ring splitting members 102b and 102c to the outer ring 14b. Thereafter, the inner ring 14a, the outer ring 14b, the inner ring splitting member 102a and the outer ring splitting members 102b, 102c are fitted to the housing inner 22 and the rotor 12, and the inner ring presser 26 and the outer ring presser 28 are mounted thereon.

Next, the operation of the present embodiment will be described.
When the coil 16 is energized, rotational torque is applied to the rotor 12 and the rotor 12 rotates. A change in reluctance between the position detector 20 and the resolver rotor 18 that rotates integrally with the rotor 12 is detected, and a controller (not shown) controls rotation speed and positioning.

  When a load in the radial direction is applied to the direct drive motor 100, the inner ring splitting member 102a that is split and tightened so that the outer diameter is enlarged and the radial movement is restrained by the inlay fitting is formed on the inner peripheral surface of the inner ring 14a. Since the outer ring splitting members 102b and 102c, which are split so that the inner diameter is reduced and the radial movement is restricted by fitting with an inlay, are fitted to the outer peripheral surface of the outer ring 14b, the housing inner 22 and the inner ring 14a It is suppressed that the distance between them and the distance between the rotor 12 and the outer ring 14b change. As a result, the change in the resolver gap is suppressed.

  Thus, in the present embodiment, the cross roller bearing 14 having the inner ring 14a and the outer ring 14b, the housing inner 22 fitted to the inner peripheral surface of the inner ring 14a and supported by the inner ring 14a, and the outer peripheral surface of the outer ring 14b. The rotor 12 fitted to the outer ring 14 b and supported by the outer ring 14 b, the inner ring retainer 26 that fixes the inner ring 14 a while being pressed in the axial direction, and the resolver in which the reluctance between the housing inner 22 and the rotor 12 varies depending on the position of the rotor 12. 30, the inner ring splitting member 102a is fitted to the inner peripheral surface of the inner ring 14a, the inner ring splitting member 102a is split and tightened so that the outer diameter of the inner ring splitting member 102a is expanded, and the housing inner 22 and the inner ring The inner ring splitting member 102 a was fitted in by a presser 26.

  As a result, even if a radial load is applied to the direct drive motor 100, the distance between the housing inner 22 and the inner ring 14a is suppressed from changing as compared with the conventional case, so that the gap change of the resolver 30 due to the load is suppressed. Is suppressed, and the possibility that the resolver 30 erroneously detects can be reduced. Further, deformation of the inner ring 14a can be suppressed. Further, since the housing inner 22 and the inner ring 14a can be disassembled, the maintainability can be improved.

Further, in the present embodiment, the inner ring splitting member 102a is integrally fixed to the housing inner 22 and the inner ring presser 26 in the axial direction.
As a result, a high frictional force is obtained, and the change in the distance between the housing inner 22 and the inner ring 14a is further suppressed, so that the possibility of erroneous detection by the resolver can be further reduced.

  Further, in the present embodiment, an outer ring presser 28 that fixes the outer ring 14b in an axially pressed state is provided, and the outer ring splitting members 102b and 102c are fitted to the outer peripheral surface of the outer ring 14b, and the outer ring splitting member 102b, The outer ring splitting members 102b and 102c were split and tightened so that the inner diameter of 102c was reduced, and the outer ring splitting members 102b and 102c were fitted in-slot by the rotor 12 and the outer ring presser 28.

  As a result, even if a radial load is applied to the direct drive motor 100, a change in the distance between the rotor 12 and the outer ring 14b is suppressed, so that a change in the gap of the resolver 30 due to the load is suppressed. The possibility of erroneous detection can be further reduced. Further, deformation of the outer ring 14b can be suppressed. Furthermore, since the rotor 12 and the outer ring 14b can be disassembled, the maintainability can be improved.

Further, in the present embodiment, the outer ring splitting members 102b and 102c are fixed integrally with the rotor 12 and the outer ring presser 28 in the axial direction.
Thereby, a high frictional force is obtained, and the change in the distance between the rotor 12 and the outer ring 14b is further suppressed, so that the possibility of erroneous detection by the resolver can be further reduced.
Furthermore, in the present embodiment, the resolver 30 is disposed to face the annular resolver rotor 18 having an inner periphery that is eccentric with respect to the axis of the cross roller bearing 14, and the resolver rotor 18 at a predetermined interval. And a position detector 20 that detects a change in reluctance with the resolver rotor 18.

Thus, in the resolver 30 of the type in which the fundamental wave component of the reluctance change per rotation is one cycle, the influence of the gap change due to the load is large, and thus the suppression of the gap change is effective in preventing erroneous detection.
In the above embodiment, the cross roller bearing 14 corresponds to the rolling bearing of the invention 1 to 4 or 6, the housing inner 22 corresponds to the inner ring supported body of the invention 1 to 3 or 6, and the rotor 12 corresponds to the invention. The resolver rotor 18 corresponds to the object to be detected according to the sixth aspect of the invention. The position detector 20 corresponds to the detection means of the sixth aspect.

In the above embodiment, the inner ring splitting member 102a is inserted and clamped from the outer peripheral surface of the inner ring splitting member 102a to clamp the inner ring splitting member 102a. However, the inner ring side is the inner peripheral surface of the inner ring 14a. Since the outer peripheral surfaces of the inner ring splitting member 102a are close to each other and the push screw 108a is difficult to tighten, it can be configured as shown in FIG.
FIG. 5 is a partial cross-sectional view of the direct drive motor 100 in the radial direction.

  As shown in FIG. 5, the scraper 104a is formed with a taper screw hole 110a whose diameter increases radially inward. Then, the inner ring splitting member 102a is split so that the outer diameter is increased by screwing the taper screw 112a into the taper screw hole 110a from the inner peripheral surface side of the inner ring splitting member 102a to widen the interval of the scraping split 104a. It is tightened and closely contacts the inner ring 14a.

As a result, when the inner ring split member 102a is fitted to the inner ring 14a, the split ring can be easily performed.
Moreover, in the said embodiment, although the cross roller bearing 14 was applied, it is not limited to this, An angular ball bearing, a deep groove ball bearing, a cylindrical roller bearing, a tapered roller bearing, etc. may be applied.

  Further, in the above embodiment, the rolling bearing device having the fixing structure by split tightening according to the present invention is applied to the structure that rotatably supports the housing inner 22 and the rotor 12. The present invention can be applied to any structure as long as it is interposed between members and supports them relatively rotatably.

FIG. 3 is a cross-sectional view of the direct drive motor 100 in the axial direction. FIG. 2 is a cross-sectional view of the direct drive motor 100 in the radial direction. FIG. 3 is an axial cross-sectional view along the line A-A ′ of FIG. 2. FIG. 3 is a cross-sectional view in the axial direction along the line B-B ′ of FIG. 2. 2 is a partial cross-sectional view of the direct drive motor 100 in the radial direction. FIG. It is sectional drawing of the axial direction of the conventional rolling bearing apparatus.

Explanation of symbols

100 Direct drive motor 12 Rotor 14 Cross roller bearing 14a Inner ring 14b Outer ring 14c Cross roller 16 Coil 18 Resolver rotor 20 Position detector 22 Housing inner 26 Inner ring presser 28 Outer ring presser 98a, 100a, 98b, 100b Convex step 102a Inner ring splitting member 102b, 102c Outer ring splitting member 104a Scratch split 104b, 104c Ends 106a, 106b, 106c, 110a Screw hole 108a Press screw 108b Clamping bolt 112a Taper screw 12a, 22a Flange 26b, 28b Press part 18a, 20a, 26a, 28a Bolt

Claims (6)

A rolling bearing having an inner ring and an outer ring, an inner ring supported body fitted to the inner circumferential surface of the inner ring and supported by the inner ring, and an outer ring supported body fitted to the outer circumferential surface of the outer ring and supported by the outer ring A rolling bearing device comprising: an inner ring presser that fixes the inner ring while being pressed in an axial direction; and a resolver in which reluctance between the inner ring supported body and the outer ring supported body varies depending on their relative positions.
A capping member having at least one discontinuous portion on the circumference is fitted to an inner peripheral surface of the inner ring, and the capping member is cleaved so that an outer diameter of the capping member is enlarged, and the inner ring A rolling bearing device having a fixing structure by split tightening, wherein the split member is inlay-fitted by a supported body and the inner ring presser. In claim 1,
The rolling bearing device having a fixing structure by split tightening, wherein the split member is fixed in an axial direction integrally with the inner ring supported body and the inner ring presser. A rolling bearing having an inner ring and an outer ring, an inner ring supported body fitted to the inner circumferential surface of the inner ring and supported by the inner ring, and an outer ring supported body fitted to the outer circumferential surface of the outer ring and supported by the outer ring A rolling bearing device comprising: an outer ring presser that fixes the outer ring pressed in an axial direction; and a resolver in which the reluctance between the inner ring supported body and the outer ring supported body changes according to their relative positions.
A capping member having at least one discontinuous portion on the circumference is fitted to the outer peripheral surface of the outer ring, the capping member is cleaved so that the inner diameter of the capping member is reduced, and the outer ring supported A rolling bearing device having a fixing structure by split tightening, wherein the split tightening member is fitted in-row by a body and the outer ring presser. In claim 3,
The rolling bearing device having a fixing structure by split tightening, wherein the split member is fixed in an axial direction integrally with the outer ring supported body and the outer ring presser. In any one of Claim 1 and 2,
The discontinuous portion of the cleaving member is formed as a slit having a taper screw hole whose diameter increases radially inward, and the cleaving member is cleaved by a taper screw through the taper screw hole from the inner peripheral surface side of the cleaving member. A rolling bearing device having a fixing structure by split tightening, characterized by being tightened. In any one of Claims 1 thru | or 5,
The resolver includes an annular detection object in which one of an inner periphery and an outer periphery is decentered with respect to the axis of the rolling bearing, and a detection unit that detects a change in reluctance between the detection object. The detected body on one of the inner ring supported body and the outer ring supported body and the detecting means on the other side so that the eccentric side of the inner circumference and outer circumference of the detected body faces the detecting means. A rolling bearing device having a fixing structure by split tightening, characterized in that a roller bearing device is provided.

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