JP4140293B2 - Pulsar ring and rolling bearing device for rotation detector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pulsar ring and a rolling bearing device for a rotation detector.
[0002]
[Prior art]
For example, in a car or the like, a rolling detector used for controlling an anti-lock brake system (ABS) or the like may be provided on a rolling bearing device for supporting a wheel.
[0003]
The rotation detector is configured to include a pulsar ring and a sensor. The pulsar ring is attached to a rotating member provided in the rolling bearing device, and the sensor is attached to the stationary member side in a state of facing the pulsar ring. The rotational speed of the pulsar ring that rotates in synchronization with the rotating member is detected by a sensor, and thereby the rotational state such as the rotational speed and the rotational direction of the wheel is detected.
[0004]
In general, the types of pulsar rings include a comb-shaped metal ring and a magnetic piece type having a metal ring with through holes at several places around the circumference, or alternately in the circumferential direction with respect to a metal support ring. There is a magnet type to which an annular magnet formed by arranging magnetic poles is attached.
[0005]
An example of a magnet type pulsar ring will be described with reference to FIGS. 13 and 14 as a conventional example. In the figure, 81 is an entire rolling bearing device for supporting wheels, 82 is a hub shaft, 83 is an outer ring as a stationary member, 84 is an inner ring as a rotating member, 85 is a rolling element, 86 is a protective cap, and 87 is rotation detection. It is a vessel.
[0006]
The rotation detector 87 includes a pulsar ring 88 and a sensor 89 that detects magnetic flux. The pulsar ring 88 includes a support ring 90 attached to the inner ring 84 and an annular magnet 91 attached to the support ring 90.
[0007]
The support ring 90 has a cylindrical fitting portion 92 fitted and attached to the outer peripheral surface shoulder of the inner ring 84, and extends radially inward from one end of the fitting portion 92 and has an annular magnet 91 on the outer surface. Is attached to the flange 93, and the upper half of the cross-section has a lateral L-shape. The annular magnet 91 is a magnetized rubber ring in which rubber mixed with magnetic powder is formed into an annular plate shape, and its N and S poles are magnetized alternately in the circumferential direction.
[0008]
[Problems to be solved by the invention]
Usually, it is necessary to position the sensor 89 so that the center X of the sensor 89 and the detection diameter Y of the annular magnet 91 of the pulsar ring 88 coincide with each other.
[0009]
That is, in the above conventional example, it is necessary to specify the arrangement position of the annular magnet 91 of the pulsar ring 88 according to the arrangement position of the sensor 89.
[0010]
Assuming that the center X of the sensor 89 has to be disposed on the outer diameter side of the outer peripheral surface shoulder of the inner ring 84, the support ring 90 of the pulsar ring 88 has an L-shaped cross section in the upper half. Therefore, it is impossible to make the detected diameter Y of the annular magnet 91 attached to the flange 93 of the support ring 90 coincide with the center X of the sensor 89.
[0011]
For such a situation, as shown in FIG. 14, the outer diameter of the outer peripheral surface shoulder of the inner ring 84 to which the pulsar ring 88 is attached is increased from R1 to R2, and then the diameter of the pulsar ring 88 is increased. If it is increased, the detection diameter Y of the annular magnet 91 can be matched with the center X of the sensor 89. However, such measures are not preferable because it is necessary to change the shapes of the inner ring 84 and the pulsar ring 88, leading to an increase in cost.
[0012]
[Means for Solving the Problems]
The present invention is a pulsar ring used in a rotation detector for detecting the rotation state of a rotating member, and includes a support ring attached to the rotating member and an annular magnet attached to the support ring. The support ring includes a cylindrical portion that is fitted and attached to a shoulder portion of the peripheral surface of the rotating member, and a flange that extends only from the outer end of the cylindrical portion to one side in the radial direction. Is attached to the outer surface of the flange, and the annular magnet extends to the other side in the radial direction.
Further, the present invention is a pulsar ring used in a rotation detector for detecting a rotation state of a rolling member, comprising: a support ring attached to the rotation member; and an annular magnet attached to the support ring. And the support ring includes a cylindrical portion that is fitted and attached to the peripheral shoulder portion of the rotating member, and a flange that extends from the outer end of the cylindrical portion only to one side in the radial direction. The L-shaped support ring has a cross-sectional shape, the annular magnet is attached to the outer surface of the flange, and the annular magnet extends to the other side in the radial direction.
Moreover, in the pulsar ring according to the present invention, preferably, the annular magnet on the other side in the radial direction with respect to the cylindrical portion is wider than the axial width of the annular magnet on the one side in the radial direction with respect to the cylindrical portion. The axial width is larger.
[0013]
In addition, the said rotation member is a shaft body, a cylinder, etc. The outer end of the cylindrical portion is a portion located on the edge side of the rotating member. The flange may be in contact with the end face of the rotating member or in a non-contact state.
[0014]
In this case, the annular magnet is attached to the outer surface of the flange, and the annular magnet is extended to the other side in the radial direction. It becomes an annular magnet extending portion on the other side in the radial direction opposite to the one side in the radial direction extending from the cylindrical portion. Therefore, in the pulsar ring of the present invention, the detection range of the annular magnet with respect to the sensor in the annular magnet is expanded in the radial direction as compared with the conventional case where the annular magnet is provided only on the flange of the support ring. The detection position of the sensor and the detection center of the sensor are easily matched in the radial direction. Therefore, since the width in the radial direction of the annular magnet attached to the flange can be set to be relatively large, even if the sensor arrangement position is slightly different in the radial direction, the detection can be performed satisfactorily, so the versatility is high. It will be a thing. Therefore, unlike the prior art shown in FIGS. 13 and 14, it is not necessary to change the outer diameter of the inner ring to which the pulsar ring is attached and the inner diameter of the outer ring.
[0015]
Further, when the annular magnet is formed to include the corner portion formed between the cylindrical portion of the support ring and the flange, the annular magnet is radially formed from the end portion of the flange outer surface. Even when the ring magnet is extended to one side, the extended portion of the annular magnet rides on the outer peripheral portion of the cylindrical portion of the support ring, so that the support is firmly established. Therefore, the detection position of the annular magnet is less likely to fluctuate in the axial direction, whereby detection is less likely to be unstable, and there is an advantage that detection can be performed with high accuracy.
[0016]
The pulsar ring according to the present invention restricts the position of the annular magnet in the axial direction so as to form an axially extending portion including a corner portion formed between the cylindrical portion and the flange. It is preferable that the restricting portion is provided in the cylindrical portion. In this case, the detection position of the annular magnet is less likely to fluctuate in the axial direction by this restricting portion, and detection with higher accuracy can be performed.
[0017]
Moreover, it is preferable that the pulsar ring according to the present invention is also attached to the rear surface side in a state where the annular magnet wraps around from the edge of the flange to the rear surface side of the flange. In this case, since the annular magnet is also attached to the rear surface side of the outer surface to which the annular magnet of the flange is attached, the attachment of the annular magnet to the flange becomes firm, and there is a further problem such as peeling of the annular magnet from the flange. It becomes difficult to occur. Also, if the portion of the annular magnet that wraps around the flange back surface is in contact with the end surface of the rotating member, it can be prevented from being peeled off from the flange of the annular magnet by being suppressed by the end surface of the rotating member. The wraparound portion acts as a seal against the place where the support ring is fitted to the rotating member, and also serves as a position restricting member when fitting the support ring to the rotating member. To do.
[0018]
The rolling bearing device according to the present invention includes a fixed wheel, a rotating wheel, a rolling element interposed between the two wheels so as to be freely rollable, and a peripheral shoulder portion of the rotating wheel. A pulsar ring for detecting a rotation state, the pulsar ring having a support ring attached to the rotary ring and an annular magnet attached to the support ring, and the support ring is the rotation A cross-sectional shape by having a cylindrical portion fitted to and mounted on the peripheral shoulder portion of the ring, and a flange extending from the outer end of the cylindrical portion to only one side in the radial direction along the end surface of the rotating wheel. An L-shaped support ring is used, the annular magnet is attached to the outer surface of the flange, and the annular magnet extends radially outward along the end surface of the rotating wheel.
In the rolling bearing device according to the present invention, the axial width of the annular magnet on the other side in the radial direction with respect to the cylindrical portion is larger than the axial width of the annular magnet on the radial side with respect to the cylindrical portion. Is big.
[0019]
In this case, since the annular magnet is attached to the outer surface of the flange, and the annular magnet is extended to the other side in the radial direction, the magnetic flux generation site by the annular magnet is the flange portion of the support ring and the flange. Is an annular magnet extending portion on the other side in the radial direction opposite to the one side in the radial direction extending from the cylindrical portion. Therefore, in the pulsar ring of the rolling bearing device of the present invention, compared with the conventional case where the annular magnet is provided only on the flange of the support ring, the detection range of the annular magnet with respect to the sensor in the annular magnet is expanded in the radial direction. Therefore, the detection position of the annular magnet and the detection center of the sensor can be easily matched in the radial direction. Therefore, since the width in the radial direction of the annular magnet attached to the flange can be set to be relatively large, even if the sensor arrangement position is slightly different in the radial direction, the detection can be performed satisfactorily, so the versatility is high. It will be a thing. Therefore, unlike the prior art shown in FIGS. 13 and 14, it is not necessary to change the outer diameter of the inner ring as the rotating wheel to which the pulsar ring is attached and the inner diameter of the outer ring.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show Embodiment 1 of the present invention. Here, a rolling bearing device used on the driven wheel side of an automobile is taken as an example. The illustrated rolling bearing device 1 includes a hub shaft 2, a double-row rolling bearing 3, and a rotation detector 4.
[0021]
A flange 2a extending radially outward is provided near one end of the hub shaft 2, and a double-row rolling bearing 3 is externally mounted on the hub shaft 2 in a region closer to the vehicle inner side than the flange 2a. Yes.
[0022]
The double-row rolling bearing 3 is a double-row outward angular ball bearing, and is a single-row outer ring 31 as a fixed ring having two rows of raceway grooves and a row of outer-fit on the small-diameter outer peripheral surface 2 b of the hub shaft 2. A rotating member having a track, that is, a single inner ring 32 as a rotating wheel, a plurality of balls 33 as rolling elements arranged in two rows, and two crown-shaped cages 34 and 35, The large-diameter outer peripheral surface 2c of the hub shaft 2 is configured as one inner ring. A flange 36 extending outward in the radial direction is provided on the outer periphery of the outer ring 31. A protective cap 37 for sealing the inside of the bearing is attached to the vehicle inner side of the outer ring 31.
[0023]
Then, the flange 36 of the outer ring 31 of the double row rolling bearing 3 is attached to the carrier (or knuckle) 5 which is a part of the vehicle body by a bolt 6 so as not to rotate, and the outer surface of the flange 2a of the hub shaft 2 The disk rotor 9 and the wheel of the disk brake device are composed of (the left side in FIG. 1 and the surface on the outer side of the vehicle) and the nut 8 screwed to the bolt 7 that is inserted through several places on the circumference of the flange 2a. 10 is clamped and fixed.
[0024]
The rotation detector 4 detects a rotation state such as a rotation speed and a rotation direction of the hub shaft 2 and includes a pulsar ring 15 and a sensor 16.
[0025]
The pulsar ring 15 has a support ring 17 that is attached to the shoulder portion of the outer peripheral surface of the inner ring 32, and an annular magnet 18 that is attached to the support ring 17. As shown in FIG. 2, the annular magnet 18 has a structure in which, for example, a rubber material mixed with magnetic powder of ferrite is formed into an annular plate shape, and its circumferentially equidistant regions are alternately magnetized to N and S poles. It is a magnetic rubber ring.
[0026]
The sensor 16 has a predetermined air gap with respect to the outer surface of the annular magnet 18 of the pulsar ring 15 in a state where the center X and the detected diameter Y of the annular magnet 18 coincide with each other, as indicated by a one-dot chain line in FIG. Are attached to the protective cap 37 so as to face each other in the axial direction, and output an electrical signal corresponding to the rotational state of the annular magnet 18. This protective cap 37 is fitted and fixed to the outer ring 31. This sensor 16 is an IC or the like incorporating a magnetic detection element such as a Hall element or a magnetoresistive element that serves as a detection unit that changes the output according to the flow direction of magnetic flux, and a waveform shaping circuit that adjusts the output waveform of the magnetic detection element. This is what is called an active sensor.
[0027]
When the pulsar ring 15 rotates with the rotation of the inner ring 32 integral with the hub shaft 2, the rotation detector 4 detects a change in the magnetic flux of the pulsar ring 15 by the sensor 16, and the wheel 10 attached to the hub shaft 2. Detects the rotation speed.
[0028]
Here, since the shape of the annular magnet 18 of the pulsar ring 15 is devised, it will be described in detail below with reference to FIGS.
[0029]
The support ring 17 is extended in a radially outward direction and a radially inward direction from the outer end of the cylindrical portion 21 with a cylindrical cylindrical portion 21 fitted and attached to the outer peripheral surface shoulder of the inner ring 32. And a flange 22 forming a surface along the end surface of the inner ring 32. The annular magnet 18 is attached to the outer surface of the flange 22.
[0030]
The support ring 17 is made of a non-magnetic metal material (for example, JIS standard SUS304) or a magnetic metal material (for example, JIS standard SPCC), and is bent by, for example, pressing a single metal plate. That is, the support ring 17 is formed by bending a disk member having a circular hole concentric with an outer circumferential circle 90 degrees at a predetermined diameter position, and a cylindrical portion 21 and one end of the cylindrical portion 21. The flange 22 which is in a state extended from the inner side to the inner diameter side (outer end in a state fitted to the inner ring 32) is press-molded.
[0031]
The annular magnet 18 includes the entire outer surface of the flange 22, the outer peripheral surface portion in the vicinity of the bent portion connected to the flange 22 of the cylindrical portion 21, and the portion that wraps around from the inner diameter side edge of the outer surface of the flange 22 to the rear surface side of the flange 22. Are fixedly bonded to a portion in the vicinity of the inner diameter side edge. The outer surface of the flange 22, as shown in FIG. 4, the ring magnet 18 are formed mounting in a state in which the axial width t _1. Further, the annular magnet 18 extends radially outward from the flange 22, and the extended portion 18 a is formed so as to ride on the outer peripheral surface portion in the vicinity of the bent portion connected to the flange 22 of the cylindrical portion 21. Yes. Therefore, since there is this climbing portion, the axial width t ₂ of the radially extending portion 18 a of the annular magnet 18 is larger than the axial width t _{1 of the} portion 18 b attached to the flange 22. It has become. That is, the extending portion 18 a of the annular magnet 18 includes an axially extending portion that includes the corner portion of the flange 22 and the cylindrical portion 21 and extends in the axial direction to the side away from the flange 22. parts are bonded and fixed to the outer peripheral surface of the cylindrical portion 21, the axial width is a t ₂ that includes the axial extending portion. Further, the portion 18 c that wraps around from the inner diameter side edge of the flange 22 of the annular magnet 18 to the rear surface side of the flange 22 acts as a seal against the fitting position of the support ring 17 to the inner ring 32, and the support ring 17 is connected to the inner ring 32. Since it becomes a position restricting member when fitted to, it also acts as positioning at the time of fitting.
[0032]
Incidentally, or radial length of the extended portion 18a of the annular magnet 18, the axial width t ₂ is arbitrary. Therefore, in the pulsar ring 15, if the radial width of the annular magnet 18 is secured in advance so that the detection range of the annular magnet 18 on the outer surface of the flange 22 can be secured in a predetermined range in the radial direction, the sensor 16. It is possible to cope with a change in a predetermined range of the center X position.
[0033]
In addition, as a manufacturing procedure of the said support ring 17, after adjusting an external shape by press work, it manufactures by performing a degreasing process, a chemical conversion process (for example, phosphate coating process), and a drying process in this description order, The annular magnet 18 made of the magnetized rubber ring is attached to the flange 22 of the support ring 17 and the outer peripheral surface near the shoulder of the cylindrical portion 21 after the drying treatment by vulcanization bonding. As shown in FIG. 5, the pulsar ring 15 is manufactured by forming the support ring 17 into the annular magnet 18 by insert molding. That is, the support ring 17 is fixedly mounted in a cavity 53 constituted by three molds 50, 51, 52, and a rubber material is injected into the cavity 53 and molded.
[0034]
In such a pulsar ring 15, a radial width in a state in which the annular magnet 18 is provided on the support ring 17 in advance is set, so that the annular magnet 18 attached to the flange 22 has a radial position. Thus, the arrangement position of the sensor 16 can be changed as appropriate, so that it can be made highly versatile. Therefore, unlike the conventional example shown in FIGS. 13 and 14, it is not necessary to change the outer diameter of the inner ring 32 to which the pulsar ring 15 is attached.
[0035]
In addition, this invention is not limited only to the said Embodiment 1, Various application and deformation | transformation can be considered.
[0036]
(1) The double row rolling bearing 3 shown in the first embodiment may be various oblique contact type double row rolling bearings such as tapered rollers in addition to the double row outward angular ball bearing.
[0037]
(2) In Embodiment 1 described above, the inner ring rotation type rolling bearing device 1 is taken as an example, but the outer ring rotation type rolling bearing device 1A can be used. In the case of this outer ring rotation type rolling bearing device 1A, as shown in FIG. 6, a pulsar ring 15 is attached to a rotating member, that is, an outer ring 31 serving as a rotating ring, and a sensor is used to detect a shaft 11 serving as a fixed ring. 16 is attached. The pulsar ring 15 shown in FIG. 6 has a shape based on basically the same design concept as shown in FIG. 1 (however, the flange 22 extends radially outward from the cylindrical body 21). In addition, the extending portion 18a of the annular magnet 18 extends radially inward). In such a pulsar ring 15, as shown in FIG. 7, the radial width dimension of the annular magnet 18 is secured in advance so that the detection range of the annular magnet 18 on the outer surface of the flange 22 can be secured in a predetermined range in the radial direction. By doing so, it is possible to cope with a change in the predetermined range of the center X position of the sensor 16. Accordingly, the annular magnet 18 can be attached to the flange 22 by matching the detection diameter Y of the annular magnet 18 in accordance with the change in the predetermined range of the center X position of the sensor 16.
[0038]
(3) In the first embodiment, as the pulsar ring 15, the flange 22 of the support ring 17 in a state of being fitted to the inner ring 32 is shown as being bent radially inward from the cylindrical portion 21. As shown in FIG. 8, the flange 22 of the support ring 17 in a state of being fitted to the inner ring 32 may be bent toward the radially outer side than the cylindrical portion 21.
[0039]
In this case, the extended portion 18 a is formed so that the annular magnet 18 extends radially inward from the portion 18 b attached to the outer surface of the flange 22.
[0040]
(4) In the first embodiment, the support ring 17 of the pulsar ring 15 is provided with only the cylindrical portion 21 and the flange 22, but as shown in FIG. A configuration including 40 may be adopted.
[0041]
In this case, the second flange 40 is bent toward the radially outer side on the inner end side in the axial direction of the cylindrical portion 21. The second flange 40 is vulcanized and bonded to the axially inner end side of the extended portion 18a that extends radially outward from the portion 18b that is bonded and fixed to the flange 22 of the annular magnet 18. Therefore, the extending portion 18a of the annular magnet 18 is not only cantilevered radially outward from the flange 22 as shown in the first embodiment, but is not displaced in the axial direction by the second flange 40. It is regulated as follows. This restriction further stabilizes the mounting posture of the annular magnet 18 to the support ring 17, so that the magnetic flux can be generated from the annular magnet 18 with respect to the sensor 16 with higher accuracy, contributing to the improvement of detection accuracy. it can.
[0042]
As a modified example of such a configuration, as shown in FIG. 10, the pulsar ring 15 may be provided on the inner peripheral surface shoulder of the outer ring 31 with the outer ring 31 as a rotating member.
[0043]
Further, as shown in FIG. 11, as a restricting portion for restricting the position of the extending portion 18 a of the annular magnet 18 of the pulsar ring 15 in the axial direction, it is pressed at a predetermined intermediate position in the axial direction of the cylindrical portion 21 of the support ring 17. For example, the protrusion 41 may be provided over the entire circumference in the circumferential direction. In this case, the extending portion 18 a of the annular magnet 18 is vulcanized and bonded in a state of being coupled to the protrusion 41.
[0044]
(5) In the first embodiment, the extension portion 18a in the annular magnet 18 of the pulsar ring 15 has a constant axial width. However, as shown in FIG. 12, the extension of the pulsar ring 15 in the annular magnet 18 The axial width of the portion 18a may be set larger in the vicinity of the outer peripheral surface of the cylindrical portion 21 of the support ring 17, and may be set smaller than that at the distal end side in the radial direction of the extending portion 18a. That is, a protruding portion 18d that is wide in the axial direction is provided on a portion of the extending portion 18a that is on the outer peripheral surface of the cylindrical portion 21 and bonded thereto. The protruding portion 18d is reinforced to make the extending portion 18a difficult to deform in the axial direction.
[0045]
(6) In Embodiment 1 described above, the annular magnet is provided with a portion that wraps around from the radial end edge of the flange of the support ring to the back side of the outer surface of the flange, but there is no such wraparound portion. It may be configured.
[0046]
【The invention's effect】
In the present invention, it is possible to manufacture the detection diameter of the annular magnet of the pulsar ring larger than the radial width of the flange of the support ring in consideration of various arrangement positions in the radial direction of the sensor, Thereby, even if the sensor positions are slightly different, the pulser ring can be used in common, and therefore, it can be highly versatile. Therefore, the coaxiality between the sensor and the annular magnet and the air gap between them can be managed with high accuracy, which can contribute to the improvement of reliability and detection accuracy.
[Brief description of the drawings]
1 is a cross-sectional view of a rolling bearing device according to Embodiment 1 of the present invention. FIG. 2 is a partially broken perspective view of the pulsar ring of FIG. 1. FIG. 3 is an example of changing the detected diameter of the pulsar ring of FIG. Fig. 4 is an enlarged view of the pulsar ring of Fig. 1. Fig. 5 is an enlarged cross-sectional view of the half of the pulsar ring. Fig. 5 is an enlarged view of the half of the pulsar ring. FIG. 6 is a cross-sectional view of a rolling bearing device according to Embodiment 2 of the present invention. FIG. 7 is an enlarged view showing an example of changing the detected diameter of the pulsar ring of FIG. 6. FIG. FIG. 9 is an enlarged sectional view showing a modified example of the pulsar ring provided in the apparatus. FIG. 9 is an enlarged sectional view showing a modified example of the pulsar ring provided in the rolling bearing apparatus of the present invention. A modified example of the pulsar ring provided in the device is shown enlarged. FIG. 11 is an enlarged sectional view showing a modified example of the pulsar ring of the present invention. FIG. 12 is an enlarged sectional view showing a modified example of the pulsar ring of the present invention. FIG. 14 is an enlarged view showing an example of changing the detection diameter of the pulsar ring in FIG. 13.
DESCRIPTION OF SYMBOLS 1 Rolling bearing apparatus 2 Hub shaft 3 Double row rolling bearing 32 Inner ring (rotating member, rotating ring)
4 Rotation detector 15 Pulsar ring 16 Sensor 17 Support ring 18 Ring magnet 21 Support ring cylinder 22 Support ring flange 31 Outer ring (fixed ring)
33 Ball (rolling element) X Center of sensor Y Detection diameter of annular magnet

Claims (8)

A pulsar ring used in a rotation detector for detecting a rotation state of a rotating member,
A cylindrical portion having a support ring attached to the rotating member and an annular magnet attached to the support ring, and the support ring is fitted and attached to a peripheral shoulder portion of the rotating member And a flange extending only on one side in the radial direction from the outer end of the cylindrical portion, the annular magnet is attached to the outer surface of the flange, and the annular magnet is extended on the other side in the radial direction. Pulsar ring for rotation detector. A pulsar ring used in a rotation detector for detecting a rotation state of a rotating member,
A cylindrical portion having a support ring attached to the rotating member and an annular magnet attached to the support ring, and the support ring is fitted and attached to a peripheral shoulder portion of the rotating member And a flange extending only on one side in the radial direction from the outer end of the cylindrical portion, thereby forming a cross-sectional L-shaped support ring, the annular magnet being attached to the outer surface of the flange, and the annular The magnet is a pulsar ring for the rotation detector that extends to the other side in the radial direction . In the pulsar ring for the rotation detector according to claim 1 or 2 ,
A restricting portion for restricting the position of the annular magnet in the axial direction including the corner portion formed between the tubular portion and the flange is provided in the tubular portion. Pulsar ring for rotation detector. In the pulser ring for the rotation detector according to any one of claims 1 to 3 ,
A rotation detector pulsar ring which is attached to the back surface side in a state where the annular magnet wraps around from the edge of the flange to the back surface side of the flange. A fixed wheel, a rotating wheel, a rolling element interposed between the two wheels so as to be freely rotatable, and a pulsar ring that is attached to a peripheral shoulder portion of the rotating wheel and detects a rotating state of the rotating wheel; The pulsar ring has a support ring attached to the rotating ring and an annular magnet attached to the supporting ring, and the support ring is fitted to a peripheral shoulder portion of the rotating ring. A cylindrical portion to be mounted; and a flange extending from the outer end of the cylindrical portion to one side in the radial direction along the end surface of the rotating wheel; and the annular magnet is attached to the outer surface of the flange; and The ring magnet is a rolling bearing device that extends radially outward along an end surface of the rotating wheel. A fixed wheel, a rotating wheel, a rolling element interposed between the two wheels so as to be freely rotatable, and a pulsar ring that is attached to a peripheral shoulder portion of the rotating wheel and detects a rotating state of the rotating wheel; The pulsar ring has a support ring attached to the rotating ring and an annular magnet attached to the supporting ring, and the support ring is fitted to a peripheral shoulder portion of the rotating ring. The annular magnet has a cylindrical portion to be mounted and a flange extending from the outer end of the cylindrical portion to only one radial direction along the end surface of the rotating wheel, thereby forming an L-shaped support ring in cross section. Is a rolling bearing device that is attached to the outer surface of the flange and that the annular magnet extends radially outward along the end surface of the rotating wheel. The axial width of the annular magnet on the other radial side with respect to the cylindrical portion is larger than the axial width of the annular magnet on one radial side with respect to the cylindrical portion. Pulsar ring for rotation detector. 7. The axial width of the annular magnet on the other radial side with respect to the cylindrical portion is larger than the axial width of the annular magnet on one radial side with respect to the cylindrical portion. Rolling bearing device.

Images