JP2007187648A - Magnetized pulsar ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetized pulsar ring securing improvement in thermal shock resistance and fixing of a magnetized object when the magnetized object is a resin bonded magnet, the flaw resistance is improved and the resin bonded magnet is used. <P>SOLUTION: The magnetized body 12 is a bonded magnet, and is fixed to a support member 11 in accordance with an integral injection molding, in such a manner that a come-off preventing portion 15 engaging with an outer peripheral portion of a flange portion 14 is formed in an outer periphery of the magnetized body 12. An elastic layer 17 is interposed between the magnetized body 12 and the flange portion 14. A side surface of the flange portion 14 is provided with a concave portion 16 having a depth corresponding to a thickness of the elastic layer 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a magnetized pulsar ring used in a rolling bearing device with a sensor capable of detecting a rotational speed.

  In a railway vehicle or automobile, a rolling bearing device with a sensor as shown in FIG. 11 is used to support an axle or a rotating shaft that transmits rotation to the axle and detect the rotational speed of the shaft (Patent Document 1). reference).

  In FIG. 11, the sensor-equipped rolling bearing device includes a rolling bearing (41), a sensor device (42) provided thereon, and a magnetized pulsar ring (43) as a detected portion.

  The rolling bearing (41) includes an outer ring (44) that is a fixed ring, an inner ring (45) that is a rotating ring, and balls (46) that are a plurality of rolling elements arranged therebetween.

  The magnetized pulsar ring (43) includes a support member (47) fixed to the inner ring (45) and a magnetized body (48) provided on the support member (47).

  The sensor device (42) includes a case (49) fixed to the outer ring (44) and a magnetic sensor (50) provided in the case (49), and a shaft is attached to the magnetized pulsar ring (43). It is made to oppose from the direction outside.

  The support member (47) of the magnetized pulsar ring (43) includes a cylindrical portion (47a) fitted on the outer periphery of the inner ring (45), and an outward flange portion (47b) provided at the right end of the cylindrical portion (47a). ) And rotate relative to the magnetic sensor 50 to cause a change in magnetic flux density.

Such a magnetized pulsar ring may be integrated with a seal device, and as a rolling bearing device with a sensor using this, as shown in FIG. 12, a fixed wheel (52), a rotating wheel (53) and a rolling bearing (51) having rolling elements (54) disposed between both wheels (52) and (53), and a metal core (56) and a metal core ( 56) a fixed-side seal member (55) having an elastic seal (57) attached to the cylindrical portion (59) and the axial direction of the cylindrical portion (59) fitted and fixed to the rotating wheel (53) The rotary side seal member (58) having a flange portion (60) extending toward the fixed side seal member (55) connected to the end portion, and the fixed side seal member (55) supported by the resin (62). A sensor (61) and a magnetized body (63) provided on the side surface of the flange portion (60) of the rotation side seal member (58) are known (Patent Document 2). In this sensor-equipped rolling bearing device, the rotation-side seal member (58) and the magnetized body (63) correspond to a magnetized pulsar ring, and the fixed-side seal member (55) with the sensor (61) and the magnetized body (62) This has the advantage that the attached rotary side sealing member (58) (magnetization pulsar ring) can be assembled in advance (packed).
JP 2003-279588 A JP 2005-098387 A

  In the above-described magnetization pulsar ring, a magnetized body formed by magnetizing magnetic powder using rubber as a binder may be damaged by foreign matter or the like.

  Therefore, it is conceivable to increase the scratch resistance by using the magnetized body as a resin-bonded magnet. However, when a resin-bonded magnet is used, it is relatively susceptible to thermal shock, so it is easily broken and the magnetized body is fixed to the support member. Is difficult.

  An object of the present invention is to provide a magnetized pulsar ring that uses a resin-bonded magnet as a magnetized body to improve scratch resistance and to improve the thermal shock resistance when the resin-bonded magnet is used and to secure the magnetized body. is there.

  A magnetizing pulsar ring according to a first aspect of the present invention is a magnetizing pulsar ring comprising a cylindrical portion and a support member comprising a flange portion provided at one end of the cylindrical portion, and a disk-shaped magnet provided at the flange portion of the support member. The magnetized body is a bonded magnet, and is fixed to the support member by integral injection molding so that a disengagement preventing portion that engages with the outer peripheral portion of the flange portion is formed on the outer periphery thereof. A linear expansion coefficient adjusting material that makes the linear expansion coefficient close to that of the support member is added.

  A magnetizing pulsar ring according to a second aspect of the present invention is a magnetizing pulsar ring comprising a cylindrical part and a support member comprising a flange part provided at one end of the cylindrical part, and a disk-like magnet provided at the flange part of the support member. The magnetized body is a bonded magnet, and is fixed to the support member by integral injection molding so that a disengagement preventing portion that engages with the outer peripheral portion of the flange portion is formed on the outer periphery thereof. An elastic layer is interposed therebetween, and a recess having a depth corresponding to the thickness of the elastic layer is provided on a side surface of the flange portion.

  A magnetizing pulsar ring according to a third aspect of the present invention is a magnetizing pulsar ring comprising a cylindrical part and a support member comprising a flange part provided at one end of the cylindrical part, and a disk-like magnet provided at the flange part of the support member. The magnetized body is a bonded magnet, and is fixed to the support member by integral injection molding so that a disengagement preventing portion that engages with the outer peripheral portion of the flange portion is formed on the outer periphery thereof. It is chamfered, an annular recess is provided on the side surface of the flange portion, and one side surface of the magnetized body is fitted in the recess.

  The magnetized pulsar ring according to the fourth invention is a magnetized pulsar ring comprising a support member and a magnetized body supported by the support member. The magnetized body is a bond magnet, and is fixed to the support member via an adhesive layer. An annular recess for accommodating the adhesive layer is formed in the support member.

  The magnetized pulsar ring according to the fifth invention is a magnetized pulsar ring comprising a support member and a magnetized body supported by the support member. The magnetized body is a bond magnet, and a first adhesive layer bonded to the support member, a magnetized body And a second adhesive layer bonded to the adhesive layer and an elastic layer interposed between the two adhesive layers.

  In the magnetized pulsar ring according to the first to fifth inventions, as the resin bond magnet, ferrite powder + PPS (polyphenyl sulfide resin), ferrite powder + PA66 (polyamide resin), rare earth magnetic powder + PPS, rare earth magnetic powder + PA66, ferrite powder + Rare earth magnetic powder + PPS, ferrite powder + rare earth magnetic powder + PA66, etc. are suitable, and other combinations of magnetic powder and resin may be used. Further, a reinforcing material such as glass fiber may be added to the resin. As the support member, a ferritic stainless steel such as SUS430 is suitable.

  In the magnetized pulsar ring of the first to third inventions, the resin bonded magnet is integrally injection-molded with the support member (slinger), and thereafter the N pole and the S pole are equidistantly spaced by the magnetizing device. Is magnetized. According to the magnetized pulsar ring of the first to third inventions, the magnetized body may be detached from the support member by forming the disengagement preventing portion that engages with the outer peripheral portion of the flange portion on the outer periphery of the magnetized body. Is prevented.

  In the magnetized pulsar ring of the fourth and fifth inventions, the resin bonded magnet is fixed to the support member (slinger) via the adhesive layer, and thereafter, the N pole and the S pole are equally spaced by the magnetizing device. It is magnetized so that According to the magnetizing pulsar rings of these fourth and fifth inventions, the outer periphery of the magnetized body does not require the disengagement preventing portion that engages with the outer periphery of the flange portion, and the disengagement preventing portion that is relatively weak against thermal shock is eliminated. As a result, durability is improved. In the magnetized pulsar ring of the fourth and fifth inventions, as in the magnetized pulsar ring of the first to third inventions, a support member comprising a cylindrical portion and a flange portion provided at one end of the cylindrical portion, and a support member Of course, it is possible to have a configuration consisting of a disk-shaped magnet provided on the flange portion, but a configuration consisting of a cylindrical support member and a cylindrical magnet provided on the outer periphery or inner periphery thereof. You can also

  In the magnetized pulsar ring according to the present invention, the support member is made of a metal such as stainless steel, so that the resin-bonded magnet and the support member have different linear expansion coefficients. Therefore, the deformation amount of the magnetized body and the support member is different at the time of thermal expansion or thermal contraction, and the magnetized body is easily cracked against thermal shock. The detachment prevention part is weaker than other parts of the magnetized body (perforated disk-shaped signal output part) and stress is likely to concentrate, and is therefore the weakest part against thermal shock. Therefore, in the magnetized pulsar ring according to each invention, the following thermal shock countermeasures are taken.

  According to the magnetized pulsar ring according to the first invention, the linear expansion coefficient adjusting material that brings the linear expansion coefficient of the magnetized body close to the linear expansion coefficient of the support member is added to the magnetized body. The deformation amount of the magnetized body and the support member becomes the same, and the stress generated in the detachment preventing portion is reduced.

  According to the magnetized pulsar ring according to the second invention, the elastic layer is interposed between the magnetized body and the flange portion, so that the elastic layer absorbs the difference in deformation amount and is generated in the detachment preventing portion. Stress to be reduced. As the elastic layer, a rubber sheet (rubber layer), a resin sheet (resin layer), an adhesive (adhesive layer), or the like can be used. The elastic layer can be not only one layer but also two or more layers. For example, the elastic layer has a first adhesive layer bonded to the support member and a second adhesive layer bonded to the magnetized body 2. A first adhesive layer bonded to the support member, a second adhesive layer bonded to the magnetized body, and another elastic layer interposed between the two adhesive layers (hereinafter referred to as “intermediate elastic layer”) The material of the rubber layer used as the intermediate elastic layer is preferably excellent in heat resistance, such as NBR (nitrile rubber) and HNBR (hydrogenated nitrile rubber). FKM (fluorine rubber), VMQ (silicon rubber), EPDM (ethylene propylene rubber), etc. can be used.

  When the intermediate elastic layer interposed between the adhesive layers in a three-layer structure is a rubber layer, the magnetized body may be integrated with the support member by insert molding. May be adhered to the support member. Further, the step of adhering the rubber layer to the support member via the first adhesive layer and the step of adhering the magnetized body to the rubber layer via the second adhesive layer may be performed separately. For example, it may be performed simultaneously with insert molding. The rubber layer and the support member and / or the magnetized body may be bonded by vulcanization bonding.

  According to the magnetized pulsar ring according to the third invention, the corner portion of the flange portion is chamfered, so that the stress applied to the detachment preventing portion is dispersed, and the detachment preventing portion can be made thicker to prevent detachment. The stress generated in the part is reduced. Chamfering is performed before integral injection molding, and by using the same mold as that without chamfering, the chamfered portion is replaced with a resin bond magnet, and the detachment prevention portion is thickened. The shape of the chamfered portion may be a flat inclined surface, but may be a curved surface. Further, chamfering may be performed only on one side (only the outer corner in the axial direction) or on both sides.

  According to the magnetized pulsar ring according to the fourth invention, measures against thermal shock are taken by eliminating the detachment preventing portion. The adhesive layer also functions as an elastic layer and can absorb the difference in deformation between the support member and the magnetized body. And since the annular recess for accommodating the adhesive layer is formed in the support member, it is not necessary to thin the magnetized body, the management of the thickness of the adhesive layer is facilitated, and the thermal shock resistance is improved. Decline and ease of removal of the magnetized body are surely prevented.

  According to the magnetized pulsar ring according to the fifth invention, measures against thermal shock are taken by eliminating the detachment preventing portion. The adhesive layer also functions as an elastic layer, and the elastic layer having a three-layer structure can absorb the difference in deformation amount between the support member and the magnetized body. The first adhesive layer bonded to the support member, the second adhesive layer bonded to the magnetized body, and the intermediate elastic layer interposed between the two adhesive layers (third adhesive layer, rubber layer, resin layer) Etc.), it is possible to use an adhesive having good compatibility with each of the support member and the magnetized body, and it is possible to reliably prevent the magnetized body from coming off.

  According to the magnetizing pulsar ring of the first to fifth inventions, since the magnetized body is a bonded magnet, scratch resistance can be improved.

  According to the magnetizing pulsar ring of the first to third inventions, the magnetized body is fixed to the support member by integral injection molding so as to form a detachment preventing portion that engages with the outer peripheral portion of the flange portion. Therefore, the manufacturing process can be shortened and the cost can be reduced, and the ease of detachment of the magnetized body, which becomes a problem when a resin bonded magnet is used, is solved. Furthermore, in the first invention, the linear expansion coefficient adjusting material that brings the linear expansion coefficient of the magnetized body closer to the linear expansion coefficient of the support member is added to the magnetized body. In the third invention, since the corner portion of the flange portion is chamfered, the thermal shock resistance is improved and the reliability is high. It has become.

  Further, according to the magnetized pulsar ring according to the fourth and fifth inventions, a measure against thermal shock is taken by eliminating the detachment preventing portion, and the adhesive layer also functions as an elastic layer, and is attached to the support member. Since the difference in deformation amount from the magnetic body can be absorbed, it is possible to prevent the thermal shock resistance from being lowered and the magnetized body from being easily detached.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a first embodiment of a magnetized pulsar ring according to the first invention. In the following description, the left and right refer to FIG.

  In FIG. 1, the magnetized pulsar ring (1) includes a support member (11) fixed to the inner ring and a magnetized body (12) provided on the support member (11).

  The support member (11) includes a cylindrical portion (13) fitted on the outer periphery of the inner ring and an outward flange portion (14) provided at the right end portion of the cylindrical portion (13).

  The magnetized body (12) is a resin bonded magnet, and is fixed over the entire circumference of the right side surface of the flange portion (14) of the support member (11) by integral injection molding.

  On the outer periphery of the magnetized body (12), a detachment preventing portion (15) having an inverted L-shaped cross section and engaging with the outer peripheral portion of the flange portion (14) is provided. 12) is prevented from coming off the support member (11).

  A linear expansion coefficient adjusting material (glass fiber, carbon fiber, etc.) that makes the linear expansion coefficient of the magnetic body (12) close to the linear expansion coefficient of the support member (11) is added to the resin bond magnet constituting the magnetic body (12) Has been. The amount of the linear expansion coefficient adjusting material to be added may be determined as an appropriate amount by actually conducting a thermal shock test or the like, but the linear expansion coefficient of the magnetized body (12) is the linear expansion coefficient of the support member (11). The rate is preferably 1 to 2 times, more preferably 1 to 1.5 times. As a result, the amount of deformation of the magnetized body (12) and the support member (11) is substantially the same during thermal expansion or contraction, and the stress generated in the detachment preventing portion (15) is reduced.

  FIG. 2 shows a second embodiment of the magnetized pulsar ring according to the first invention.

  In the figure, the magnetized pulsar ring (2) includes a support member (11) fixed to the inner ring and a magnetized body (12) provided on the support member (11).

  The support member (11) includes a cylindrical portion (13) fitted on the outer periphery of the inner ring and an outward flange portion (14) provided at the right end portion of the cylindrical portion (13).

  The magnetized body (12) is a resin bonded magnet, and is fixed over the entire circumference of the right side surface of the flange portion (14) of the support member (11) by integral injection molding.

  On the outer periphery of the magnetized body (12), a detachment preventing portion (15) having an inverted L-shaped cross section and engaging with the outer peripheral portion of the flange portion (14) is provided. 12) is prevented from coming off the support member (11).

  Further, an annular recess (16) is provided on the right side surface of the flange portion (14). The inner diameter and outer diameter of the recess (16) are the same as the inner diameter and outer diameter of the magnetized body (12), and one side surface (left side surface) of the magnetized body (12) is inside the recess (16). It is inserted in.

  Similar to the first embodiment, a linear expansion coefficient adjusting material (glass fiber, carbon fiber, etc.) is added to the resin bonded magnet constituting the magnetized body (12).

  The axial dimension of the magnetized pulsar ring (2) of the second embodiment is the same as the axial dimension of the magnetized pulsar ring (1) of the first embodiment, and both are provided on the side surface of the flange portion (14). There is a difference in whether or not the recess (16) is provided. Therefore, in the second embodiment in which the recess (16) is provided, the thickness of the magnetized body (12) is increased, and the magnetic force is increased accordingly.

  FIG. 3 shows a first embodiment of the magnetized pulsar ring according to the second invention.

  In FIG. 3, the magnetized pulsar ring (3) includes a support member (11) fixed to the inner ring and a magnetized body (12) provided on the support member (11).

  The support member (11) includes a cylindrical portion (13) fitted on the outer periphery of the inner ring and an outward flange portion (14) provided at the right end portion of the cylindrical portion (13).

  The magnetized body (12) is a resin bonded magnet, and is fixed over the entire circumference of the right side surface of the flange portion (14) of the support member (11) by integral injection molding.

  On the outer periphery of the magnetized body (12), a detachment preventing portion (15) having an inverted L-shaped cross section and engaging with the outer peripheral portion of the flange portion (14) is provided. 12) is prevented from coming off the support member (11).

  An elastic layer (17) is interposed between the magnetized body (12) and the flange portion (14). The elastic layer (17) is a thin rubber sheet, and not only between the side surface of the magnetized body (12) and the side surface of the flange portion (14), but also between the outer peripheral surface of the flange portion (14) and the magnetized body (12). It is also provided between the detachment prevention portion (15). The elastic layer (17) absorbs the difference between the deformation amount of the magnetized body (12) and the deformation amount of the support member (11), thereby reducing the stress generated in the detachment preventing portion (15).

  FIG. 4 shows a second embodiment of the magnetized pulsar ring according to the second invention.

  In FIG. 4, the magnetized pulsar ring (4) includes a support member (11) fixed to the inner ring and a magnetized body (12) provided on the support member (11).

  The support member (11) includes a cylindrical portion (13) fitted on the outer periphery of the inner ring and an outward flange portion (14) provided at the right end portion of the cylindrical portion (13).

  The magnetized body (12) is a resin bonded magnet, and is fixed over the entire circumference of the right side surface of the flange portion (14) of the support member (11) by integral injection molding.

  On the outer periphery of the magnetized body (12), a detachment preventing portion (15) having an inverted L-shaped cross section and engaging with the outer peripheral portion of the flange portion (14) is provided. 12) is prevented from coming off the support member (11).

  An elastic layer (17) is interposed between the magnetized body (12) and the flange portion (14). The elastic layer (17) is a thin rubber sheet, and not only between the side surface of the magnetized body (12) and the side surface of the flange portion (14), but also between the outer peripheral surface of the flange portion (14) and the magnetized body (12). It is also provided between the detachment prevention part (15). The elastic layer (17) absorbs the difference between the deformation amount of the magnetized body (12) and the deformation amount of the support member (11), thereby reducing the stress generated in the detachment preventing portion (15).

  Further, an annular recess (16) is provided on the right side surface of the flange portion (14). The inner diameter and outer diameter of the recess (16) are the same as the inner diameter and outer diameter of the magnetized body (12), and the depth thereof is the same as the thickness of the elastic layer (12). ) Is fitted in the recess (16).

  The axial dimension of the magnetized pulsar ring (4) of the second embodiment is the same as the axial dimension of the magnetized pulsar ring (3) of the first embodiment, and both are provided on the side surface of the flange portion (14). There is a difference in whether or not the recess (16) is provided. Therefore, in the second embodiment in which the recess (16) is provided, the thickness of the magnetized body (12) is the first according to the first invention despite the elastic layer (12) being provided. This is the same as the magnetized pulsar ring (1) of the embodiment.

  FIG. 5 shows a first embodiment of the magnetized pulsar ring according to the third invention.

  In FIG. 5, the magnetized pulsar ring (5) includes a support member (11) fixed to the inner ring and a magnetized body (12) provided on the support member (11).

  The support member (11) includes a cylindrical portion (13) fitted on the outer periphery of the inner ring and an outward flange portion (14) provided at the right end portion of the cylindrical portion (13).

  The magnetized body (12) is a resin bonded magnet, and is fixed over the entire circumference of the right side surface of the flange portion (14) of the support member (11) by integral injection molding.

  On the outer periphery of the magnetized body (12), a detachment preventing portion (15) having an inverted L-shaped cross section and engaging with the outer peripheral portion of the flange portion (14) is provided. 12) is prevented from coming off the support member (11).

  The flange portion (14) of the support member (11) is chamfered with a flat inclined surface (18) at the right corner of the outer periphery thereof. As a result, the stress applied to the detachment preventing portion (15) is dispersed, and the detachment preventing portion (15) can be made thick, and the stress generated in the detachment preventing portion (15) is reduced.

  FIG. 6 shows a second embodiment of the magnetized pulsar ring according to the third invention. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the magnetized pulsar ring (6) of this embodiment, the flange portion (14) of the support member (11) is chamfered with a curved surface (19) at the right corner of the outer periphery thereof. As a result, the stress applied to the detachment preventing portion (15) is dispersed, and the detachment preventing portion (15) can be made thick, and the stress generated in the detachment preventing portion (15) is reduced.

  FIG. 7 shows a third embodiment of the magnetized pulsar ring according to the third invention. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the magnetized pulsar ring (7) of this embodiment, the flange portion (14) of the support member (11) is chamfered with a flat inclined surface (18) at the right corner of its outer periphery, The left corner of the outer periphery is also chamfered with a flat inclined surface (20). As a result, the stress applied to the detachment preventing portion (15) is dispersed, and the detachment preventing portion (15) can be made thick, and the stress generated in the detachment preventing portion (15) is reduced.

  In the third invention, a linear expansion coefficient adjusting material may be added to the resin bond magnet constituting the magnetized body (12), and the magnetized body (12) and the flange portion (14). An elastic layer (17) may be interposed between the two, and by implementing the above embodiments in combination, a more reliable magnetization pulsar ring can be obtained.

  FIG. 8 shows a first embodiment of the magnetized pulsar ring according to the fourth invention.

  In the figure, the magnetized pulsar ring (8) includes a support member (11) fixed to the inner ring and a magnetized body (12) provided on the support member (11).

  The support member (11) includes a cylindrical portion (13) fitted on the outer periphery of the inner ring and an outward flange portion (14) provided at the right end portion of the cylindrical portion (13).

  The magnetized body (12) is a resin bonded magnet, and is fixed over the entire circumference of the right side surface of the flange portion (14) of the support member (11) by the adhesive layer (21).

  An annular recess (22) is provided on the right side surface of the flange portion (14). The size of the recess (22) corresponds to the size of the adhesive layer (21), and the entire adhesive layer (21) is fitted into the recess (22). The thickness of the magnetized body (12) is equivalent to that shown in FIGS. 2 and 4, and has a larger magnetic force than that shown in FIG. On the other hand, the detachment preventing portion (15) provided in each of the above embodiments is omitted, and the adhesive layer (21) prevents the magnetized body (12) from being detached from the support member (11). ing.

  FIG. 9 shows a first embodiment of the magnetized pulsar ring according to the fifth invention.

  In the figure, the magnetized pulsar ring (9) includes a support member (11) fixed to the inner ring and a magnetized body (12) provided on the support member (11).

  The support member (11) includes a cylindrical portion (13) fitted on the outer periphery of the inner ring and an outward flange portion (14) provided at the right end portion of the cylindrical portion (13).

  The magnetized body (12) is a resin bonded magnet, and an intermediate elastic layer (17) made of rubber is interposed between the magnetized body (12) and the flange portion (14) of the support member (11). Similar to the embodiment of FIG. 8, the detachment preventing portion (15) is omitted.

  As shown in detail in FIG. 10, adhesive layers (23) and (24) are formed on both sides of the intermediate elastic layer (17) to form a three-layer structure. These adhesive layers (23) and (24) ) Prevents the magnetized body (12) from coming off the support member (11). The adhesive layer (23) in contact with the outward flange portion (14) of the support member (11) is an adhesive that is compatible with metal, and the adhesive layer in contact with the magnetized body (12) ( 24) is an adhesive that is compatible with the resin. The adhesive layers (23) and (24) also function as an elastic layer, and both the intermediate elastic layer (17) and the adhesive layers (23) and (24) are connected to the support member (11) and the magnetized body (12). The difference in linear expansion coefficient is absorbed. The intermediate elastic layer (17) may be a third adhesive layer or a resin layer instead of rubber.

  Note that the three-layer structure shown in FIG. 10 can also be applied to the embodiment with the detachment prevention portion (15) shown in FIGS. 3 and 4, and in this way, the support member (11) and The difference in linear expansion coefficient from the magnetized body (12) can be further absorbed, and the magnetized body (12) can be more firmly fixed to the support member (11).

FIG. 1 is a cross-sectional view showing a first embodiment of a magnetized pulsar ring according to the first invention. FIG. 2 is a sectional view showing a second embodiment of the magnetized pulsar ring according to the first invention. FIG. 3 is a cross-sectional view showing a first embodiment of the magnetized pulsar ring according to the second invention. FIG. 4 is a sectional view showing a second embodiment of the magnetized pulsar ring according to the second invention. FIG. 5 is a sectional view showing a first embodiment of the magnetized pulsar ring according to the third invention. FIG. 6 is a sectional view showing a second embodiment of the magnetized pulsar ring according to the third invention. FIG. 7 is a sectional view showing a third embodiment of the magnetized pulsar ring according to the third invention. FIG. 8 is a sectional view showing a first embodiment of the magnetized pulsar ring according to the fourth invention. FIG. 9 is a sectional view showing a first embodiment of the magnetized pulsar ring according to the fifth invention. FIG. 10 is an enlarged cross-sectional view of the main part of FIG. FIG. 11 is a sectional view showing an example of a sensor-equipped rolling bearing device to which the magnetized pulsar ring according to the present invention is applied. FIG. 12 is a cross-sectional view showing another example of a rolling bearing device with a sensor to which the magnetic pulsar ring according to the present invention is applied.

Explanation of symbols

(1) (2) (3) (4) (5) (6) (7) (8) (9) Magnetized pulsar ring
(11) Support member
(12) Magnetized body
(13) Cylindrical part
(14) Flange
(15) Detachment prevention part
(16) Annular recess
(17) Elastic layer
(18) (19) (20) Chamfer
(21) Adhesive layer
(22) Annular recess
(23) (24) Adhesive layer

Claims (6)

  In the magnetizing pulsar ring consisting of a cylindrical member and a supporting member made of a flange portion provided at one end of the cylindrical portion, and a disk-shaped magnet provided in the flange portion of the supporting member, the magnetizing body is a bonded magnet, It is fixed to the support member by integral injection molding so that a disengagement prevention portion that engages with the outer peripheral portion of the flange portion is formed on the outer periphery, and the linear expansion coefficient of the magnetized body is applied to the magnetized body. Magnetized pulsar ring characterized by adding a linear expansion coefficient adjusting material that approaches the rate.   In the magnetizing pulsar ring consisting of a cylindrical member and a supporting member made of a flange portion provided at one end of the cylindrical portion, and a disk-shaped magnet provided in the flange portion of the supporting member, the magnetizing body is a bonded magnet, It is fixed to the support member by integral injection molding so that a detachment prevention portion that engages with the outer peripheral portion of the flange portion is formed on the outer periphery, and an elastic layer is interposed between the magnetized body and the flange portion. A magnetized pulsar ring characterized in that a recess having a depth corresponding to the thickness of the elastic layer is provided on a side surface of the flange portion.   In the magnetizing pulsar ring consisting of a cylindrical member and a supporting member made of a flange portion provided at one end of the cylindrical portion, and a disk-shaped magnet provided in the flange portion of the supporting member, the magnetizing body is a bonded magnet, It is fixed to the support member by integral injection molding so that a disengagement prevention portion that engages with the outer peripheral portion of the flange portion is formed on the outer periphery, the corner portion of the flange portion is chamfered, and the annular side surface of the flange portion is annular. A magnetized pulsar ring characterized in that a recess is provided and one side surface of the magnetized body is fitted in the recess.   3. The attachment according to claim 2, further comprising: a first adhesive layer bonded to the support member; a second adhesive layer bonded to the magnetized body; and an elastic layer interposed between both adhesive layers. Magnetic pulsar ring.   In a magnetic pulsar ring composed of a support member and a magnetized body supported by the support member, the magnetized body is a bonded magnet and is fixed to the support member via an adhesive layer, and the adhesive layer is placed in the support member. A magnetized pulsar ring characterized in that an annular recess is formed.   In a magnetic pulsar ring comprising a support member and a magnetized body supported by the support member, the magnetized body is a bonded magnet, a first adhesive layer bonded to the support member, a second adhesive layer bonded to the magnetized body, And a magnetized pulsar ring having an elastic layer interposed between both adhesive layers.

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