JP2013068475A - Magnetization pulser ring and manufacturing method of the same, and rolling bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetization pulser ring configured to prevent positional deviation or the like of a magnet member relative to a support member even when an adhesive strength between the magnet member and the support member becomes weak.SOLUTION: A magnetization pulser ring 20 includes: a support member 11 having an annular flange portion 11c and fixed to a rotating body so as to rotate together; an annular magnet member 15 attached to one side of the flange portion 11c with an adhesive, having a number of magnetic poles arranged in a circumferential direction at predetermined intervals, and made of a synthetic resin; and a fixing member 32 integrated into the magnet member 15 by way of insert molding, which fixes the magnet member 15 to the flange portion 11c by being locked to the flange portion 11c. The fixing member 32 includes a radial direction restriction portion 33 disposed at an end of the flange portion 11c in a radial direction, a fixed portion 34 disposed at one end of the radial direction restriction portion 33 in an axis direction and fixed to the magnet member 15, and a lock portion 35 disposed at the other end of the radial direction restriction portion 33 in the axis direction and protruding inward in the radial direction so as to be locked on the other side of the flange portion 11c.

Description

  The present invention relates to a magnetic pulsar ring that constitutes a sensor device for detecting the rotational speed (number of rotations) of a wheel or the like, a method for manufacturing the same, and a rolling bearing device that includes the magnetic pulsar ring.

  A vehicle such as an automobile equipped with an antilock brake system (ABS) or a traction control system (TCS) is provided with a sensor device for detecting the rotational speed of wheels. As this sensor device, there is known a sensor device including a magnetized pulsar ring provided on the inner ring side (rotation side) of a hub unit for attaching wheels to a vehicle and a magnetic sensor provided on the outer ring side (fixed side). (For example, refer to Patent Document 1).

  Moreover, the magnetized pulsar ring described in the following Patent Document 1 includes an annular support member and a magnet member bonded to the support member. The support member is made of a metal material, and includes a cylindrical portion that is fitted to the outer peripheral surface of the inner ring, and a flange portion that is bent and extends radially outward from an axially outer end portion of the cylindrical portion. The cross section is formed in a substantially L shape. The magnet member is formed of a synthetic resin material, and is adhered to the outer surface in the axial direction of the flange portion of the support member with an adhesive.

JP 2007-3223 A

  When the support member is formed of a metal material and the magnet member is formed of a hard resin material as in the case of the magnetized pulsar ring described in Patent Document 1, since the coefficients of thermal expansion are naturally different, When used in a magnetic pulsar ring or in a harsh temperature environment (for example, in an environment outside of −40 ° C. to 120 ° C.), the difference in thermal deformation between the magnet member and the support member (thermal expansion difference, thermal contraction difference) There is a possibility that the adhesive force of the adhesive is weakened, the magnet member is displaced with respect to the support member, or the magnet member is peeled off or dropped from the support member. Moreover, when the adhesive strength between the magnet member and the support member is increased in order to prevent such displacement and separation, a large stress is generated in the magnet member due to the difference in the amount of thermal deformation between the support member and the magnet member, In particular, when the magnet member becomes brittle in a low temperature environment, it may be easily damaged by the stress.

  The present invention has been made in view of the above problems, and even if the adhesive force between the magnet member and the support member is weakened, it is possible to prevent misalignment or peeling of the magnet member with respect to the support member. An object of the present invention is to provide a magnetized pulsar ring, a method for manufacturing the same, and a rolling bearing device.

  (1) The present invention has an annular flange portion, and is fixed to a rotating body so as to be integrally rotatable, and is bonded to one side surface of the flange portion with an adhesive, and a large number of magnetic poles are predetermined in the circumferential direction A magnetized pulsar ring comprising a synthetic resin annular magnet member arranged at intervals, and is integrated with the magnet member by insert molding and locked to the flange portion. A metal fixing member that fixes the magnet member to the flange portion is provided, and the fixing member is disposed at a radial end portion of the flange portion, and restricts radial movement of the magnet member with respect to the flange portion. A radial restriction part, an axially fixed end part of the radial restriction part, a fixed part fixed to the magnet member, and an axially other end part of the radial restriction part; Flange Wherein the of have, and the locking portion for locking the other side surface side.

  According to this configuration, even if the magnetized pulsar ring is used in an environment where the temperature change is severe, the magnet member and the support member are deformed with different amounts of thermal deformation, and the adhesive force of the adhesive between them is weakened. Since the magnet member is also fixed to the flange portion by the fixing member, it is possible to prevent positional deviation or peeling of the magnet member with respect to the flange portion. In particular, the locking portion provided at the other axial end of the fixing member is locked to the other side surface of the flange portion, so that the separation of the magnet member from the flange portion can be prevented, and the radial direction When the restricting portion comes into contact with the radial end portion of the flange portion, it is possible to prevent the displacement of the magnet member in the radial direction with respect to the flange portion. Moreover, since the fixing member is insert-molded with respect to the magnet member, it can be formed of a metal material having higher strength than the magnet member, and the magnet member can be firmly fixed to the flange portion. .

(2) It is preferable that the said latching | locking part is comprised by plastically deforming the other end part of the axial direction in the said radial direction control part to radial direction.
With such a configuration, it is possible to suitably maintain the state in which the locking portion of the fixing member is locked to the flange portion.

(3) It is preferable that a hole into which the magnet member enters is formed in the adherend portion.
With such a configuration, the bond strength between the adherend and the magnet member can be increased.

  (4) The method for manufacturing a magnetic pulsar ring according to the present invention is the method for manufacturing a magnetic pulsar ring according to any one of the above (1) to (3), wherein the fixing member is attached to the flange portion. In the mounted state, the flange portion and the fixing member are inserted into a mold, and the mold is filled with a molding material for the magnet member, whereby the flange portion, the fixing member, and the magnet member are formed by insert molding. It is characterized by being integrated.

  (5) A rolling bearing device according to the present invention includes an inner ring, an outer ring disposed radially outward of the inner ring, and a plurality of rolling elements provided so as to be capable of rolling between the inner ring and the outer ring, The magnetic pulsar ring according to any one of (1) to (3), which is attached to the outer peripheral surface of the inner ring, is provided.

  According to the present invention, even if the adhesive force between the magnet member and the support member is weakened, it is possible to prevent positional deviation or peeling of the magnet member with respect to the support member.

It is sectional drawing which shows the rolling bearing apparatus provided with the magnetization pulsar ring which concerns on the 1st Embodiment of this invention. It is sectional drawing which expands and shows the magnetization pulsar ring shown by FIG. It is explanatory drawing which shows the manufacturing process of magnetization pulsar ring. It is sectional drawing which expands and shows the magnetic pulsar ring which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which shows the manufacturing process of magnetization pulsar ring. It is sectional drawing which expands and shows the magnetic pulsar ring which concerns on the 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view showing a rolling bearing device provided with a magnetized pulsar ring according to the first embodiment of the present invention. FIG. 2 is a sectional view showing the magnetized pulsar ring in FIG. In addition, the left-right direction in these figures is called an axial direction, and the up-down direction is called radial direction. Further, with respect to the axial direction, the side (or direction) heading from the inside to the outside of the rolling bearing device 1 is referred to as the axially outer side (or axially outward), and the side (or direction) from the outside to the inside of the rolling bearing device 1. Is referred to as the axially inner side (or axially inner side).

  As shown in FIG. 1, the rolling bearing device 1 includes an inner ring 9 to which a vehicle wheel is attached, an outer ring 3 provided radially outward of the inner ring 9, and an inner ring 9 and an outer ring 3. The double row rolling elements 4 and 5 provided are provided.

  The inner ring 9 includes an inner shaft 2 and an inner ring constituting member 6, and the inner shaft 2 has a flange 2 c for attaching a wheel side member (not shown) to an end portion on the vehicle outer side (left side in FIG. 1). ing. A small-diameter portion 2d is formed on the vehicle inner side (right side in FIG. 1) of the inner shaft 2, and an inner ring constituting member 6 is fitted on the small-diameter portion 2d. The inner ring constituent member 6 has an inner track 6a for the rolling element 5 on the vehicle inner side formed on the outer peripheral surface thereof. Further, an inner track 2a for the rolling element 4 on the vehicle outer side is formed in the middle diameter portion 2e of the axially intermediate portion of the inner shaft 2. Further, the inner shaft 2 has a caulking portion 2f that is bent outwardly in the radial direction at the end on the vehicle inner side, and the inner ring constituting member 6 is connected to the inner shaft 2 by the caulking portion 2f. It is fixed against falling.

  The outer ring 3 is provided coaxially with the inner ring 9 via double-row rolling elements 4 and 5. On the inner circumferential surface of the outer ring 3, outer raceways 3a for double row rolling elements 4 and 5 are formed. Further, a flange 3c is formed on the outer peripheral surface of the outer ring 3, and the rolling bearing device 1 is fixed to the vehicle body side member by attaching the flange 3c to a vehicle body side member (not shown). Therefore, the outer ring 3 is a fixed side, and the inner ring 9 is a rotating side (rotating member) that rotates about the axis. And in order to seal the annular space R between the inner ring | wheel 9 and the outer ring | wheel 3, the cyclic | annular sealing apparatus 7 is provided in the axial direction both ends. And the magnetizing pulsar ring 20 which concerns on this invention is provided in the sealing device 7 of the vehicle inner side (right side).

  As shown in FIG. 2, the sealing device 7 on the vehicle inner side is provided between the inner peripheral surface 3 b of the outer ring 3 and the outer peripheral surface 6 b of the inner ring constituting member 6, and is a rolling bearing on the rolling elements 4, 5 side. The leakage of the lubricant from the inside of the device 1 to the outside and the entry of foreign matters such as muddy water from the outside of the rolling bearing device 1 to the rolling elements 4 and 5 are prevented.

The sealing device 7 includes a seal member 10 fixed to the outer ring 3 and a slinger 11 fixed to the inner ring constituting member 6.
The seal member 10 includes a metal core 12 and a seal portion 13. The cored bar 12 includes a cylindrical portion 12a fitted in the outer ring 3, and a flange portion 12c extending by bending radially inward from an end portion 12b on the inner side in the axial direction (left side in FIG. 2) of the cylindrical portion 12a. And has a substantially L-shaped cross section. The core metal 12 has an annular shape as a whole, and is formed by, for example, pressing a cold-rolled steel plate such as SPCC, SPCD, SPCE or the like. And the seal part 13 which consists of elastic bodies, such as rubber | gum, is united with the cored bar 12 mainly on the outer peripheral surface of the cylindrical part 12a of the cored bar 12, and the side surface of the axial direction outer side (right side in FIG. 2) of the flange part 12c. It is fixed like this.

  The slinger 11 extends from a cylindrical cylindrical portion 11a fitted on the outer peripheral surface 6b of the inner ring constituent member 6 and an axially outer end portion 11b of the cylindrical portion 11a that is bent substantially perpendicularly outward in the radial direction. It consists of a flange part 11c and is formed in a substantially L-shaped cross section. The slinger 11 has an annular shape as a whole, and is formed by, for example, pressing (drawing) a metal plate such as stainless steel. Further, the sealing device is configured such that the cylindrical portion 11a of the slinger 11 faces the cylindrical portion 12a of the core metal 12 with a space therebetween, and the flange portion 11c of the slinger 11 faces the flange portion 12c of the core metal 12 with a space therebetween. 7 is assembled to the rolling bearing device 1.

  The seal portion 13 of the seal member 10 extends from the base portion 13a located in the vicinity of the radially inner end portion of the flange portion 12c of the core metal 12 toward the outer peripheral surface of the cylindrical portion 11a of the slinger 11, and is in radial contact with the outer peripheral surface. The lip portion 13b includes an axial lip portion 13c that extends from the base portion 13a toward the axially inner side surface of the flange portion 11c of the slinger 11 and is in sliding contact with the side surface.

  The slinger 11 of the sealing device 7 also has a function as one component of the sensor device 19 for detecting the rotation speed (rotation number) of the inner ring 9. Specifically, the sensor device 19 includes a magnetized pulsar ring 20 and a sensor 18. The magnetized pulsar ring 20 includes a support member constituted by the slinger 11 described above and a magnet member 15 provided on the flange portion 11c of the support member 11, and a side surface of the magnet member 15 on the outer side in the axial direction (FIG. 2). The sensor 18 is provided so as to face the right side surface (hereinafter also referred to as “outer side surface”) 15a. The sensor 18 is configured to detect a change in the magnetic field accompanying the rotation of the magnetized pulsar ring 20, and to output a detection signal to a control unit such as an ECU (not shown) of the vehicle.

  The magnet member 15 is an annular magnet. For example, a plastic magnet obtained by mixing a powder of a ferrite magnet or the like with a thermoplastic resin base material such as PA12, PA6, or PPS is used. Further, the magnet member 15 is alternately magnetized with N and S poles in the circumferential direction. The magnet member 15 of the present embodiment has an axially inner side surface (left side surface in FIG. 2; hereinafter, also referred to as “inner side surface”) 15 b fixed to the flange portion 11 c of the support member 11 with an adhesive 30. Yes.

  Since the magnet member 15 and the support member 11 are made of different materials, the coefficients of thermal expansion are naturally different. When used in an environment where the temperature changes rapidly, the difference in thermal deformation between them (thermal expansion difference or thermal contraction difference). May weaken the adhesive force of the adhesive 30. For this reason, the adhesive 30 is preferably used having an elasticity that can absorb the difference in thermal deformation between the magnet member 15 and the support member 11. Further, the adhesive 30 preferably has a function as a sealing agent that secures the sealing performance between the magnet member 15 and the support member 11 and can prevent moisture from entering between the magnet member 15 and the support member 11. The For example, a silicone resin-based elastic adhesive can be used for the adhesive 30. The film thickness of the adhesive 30 is preferably 50 μm to 500 μm in order to exhibit the function of absorbing the difference in thermal deformation between the magnet member 15 and the support member 11.

  An annular fixing member 32 is fixed to the outer peripheral portion of the magnet member 15. The fixing member 32 is provided to fix the magnet member 15 to the flange portion 11 c of the support member 11 together with the adhesive 30. The fixing member 32 has a cylindrical portion (radial direction restricting portion) 33 disposed at a radially outer end portion of the flange portion 11c and a radially inner end portion (right end portion in FIG. 2) of the cylindrical portion 33 in the radial direction. 2 to be fixed and fixed in a state of being embedded in the magnet member 15, and the axially inner end portion (left end portion in FIG. 2) of the cylindrical portion 33 protrudes radially inward, and the flange And an engaging portion 35 that engages with the inner side surface in the axial direction of the portion 11c.

The fixing member 32 is made of a material having higher strength than the magnet member 15, for example, a metal plate material such as SPCC, SUS430, SUS304, or the like. Further, the thickness of the fixing member 32 can be set to 0.1 to 0.3 mm. The fixing member 32 is integrated with the magnet member 15 by inserting the fixed portion 34 when the magnet member 15 is molded.
The locking part 35 is formed by bending the axially inner end of the cylindrical part 33 into a substantially L shape. Therefore, the fixing member 32 is formed in a substantially U-shaped cross section by the cylindrical portion 33, the fixed portion 34, and the locking portion 35.

FIG. 3 is an explanatory view showing a manufacturing process of the magnetized pulsar ring of this embodiment.
The magnetized pulsar ring 20 of this embodiment is manufactured by insert-molding the support member 11 and the fixing member 32 into the magnet member 15. Specifically, first, the step (I) of attaching the fixing member 32 to the support member 11 is performed. At this time, the locking member 35 is not formed on the fixing member 32, and the cylindrical portion 33 is extended straight inward in the axial direction. And the extended cylindrical part 33 is fitted to the outer peripheral surface of the flange part 11c.

Next, a step (II) is performed in which the locking portion 35 is formed by caulking (plastically deforming) the axially inner end of the cylindrical portion 33 radially inward. By forming the locking portion 35 in this manner, the fixing member 32 cannot be detached from the support member 11. And after attaching the fixing member 32 to the support member 11, the adhesive agent 30 is apply | coated to the axial direction outer surface of the flange part 11c of the support member 11. FIG.
Finally, the support member 11 and the fixing member 32 are inserted into a molding die, and the molding material of the magnet member 15 is filled in the die, thereby performing the step (III) of insert molding the magnet member 15. .

  The magnetized pulsar ring 20 having the above configuration is used under a severe temperature environment, for example, and the adhesive force of the adhesive 30 between the two is weakened due to the difference in thermal deformation between the magnet member 15 and the support member 11. Even if the fixing member 32 is locked to the flange portion 11c, the magnet member 15 is displaced with respect to the support member 11, or the magnet member 15 is peeled off or dropped from the support member 11. There is nothing. That is, the locking portion 35 of the fixing member 32 is locked to the inner side in the axial direction of the flange portion, so that the magnet member 15 is prevented from moving away from the flange portion 11c in the axial direction. Since 33 contacts the radially outer end of the flange portion 11c, the magnet member 15 is prevented from being displaced in the radial direction with respect to the flange portion 11c. Therefore, the function as the magnetized pulsar ring 20 is suitably maintained, and the rotational speed of the inner ring 9 can be detected appropriately.

  Further, since the fixing member 32 is locked to the flange portion 11c by plastically deforming the locking portion 35, the fixing member 32 is not detached from the flange portion 11c, and the magnet member 15 is strengthened. It can fix to the flange part 11c. Moreover, since the fixing member 32 is integrated with the magnet member 15 by insert molding, the fixing member 32 can be formed of a material having higher strength than the magnet member 15 and firmly fixes the magnet member 15 to the flange portion 11c. It becomes possible.

  Further, as described above, when an elastic adhesive such as a silicone resin is used as the adhesive 30 for bonding the magnet member 15 to the support member 11, the amount of thermal deformation between the magnet member 15 and the flange portion 11c is reduced. Since the difference can be absorbed, it is possible to prevent a large stress from being generated in the magnet member 15 due to the difference, and it is possible to prevent the magnet member 15 from being damaged.

FIG. 4 is an enlarged cross-sectional view showing a magnetic pulsar ring according to the second embodiment of the present invention, and FIG. 5 is an explanatory view showing a manufacturing process of the magnetic pulsar ring.
The magnetized pulsar ring 20 of the present embodiment is different from the first embodiment in the form of the fixing member 132. Specifically, the fixed portion 134 of the fixing member 132 is not bent inward in the radial direction with respect to the cylindrical portion 133, and is configured to extend straight from the cylindrical portion 133 directly outward in the axial direction. It has become. In addition, a plurality of holes 134a are formed in the adherend portion 134 in the circumferential direction, and the coupling strength between the adherend portion 134 and the magnet member 15 is enhanced by the magnet member 15 entering the hole 134a. .

  The magnetized pulsar ring 20 of this embodiment is manufactured by insert-molding the support member 11, the fixing member 132, and the magnet member 15 as in the first embodiment. Specifically, as shown in FIG. 5, first, the step (I) of attaching the fixing member 132 to the support member 11 is performed. The locking portion 135 is bent inward in the radial direction with respect to the cylindrical portion 133 in advance, and the fixing member 132 is fitted to the outer peripheral surface of the flange portion 11c from the fixed portion 134 side.

Subsequently, the process (II) of apply | coating the adhesive agent 30 to the axial direction outer side surface of the flange part 11c of the supporting member 11 is performed.
Finally, the support member 11 and the fixing member 132 are inserted into a molding die, and the molding material of the magnet member 15 is filled into the die, whereby the support member 11, the fixing member 132, and the magnet member 15 are filled. Step (III) of integrating by insert molding is performed.

In the present embodiment, since the step of caulking the locking portion 135 in a state where the fixing member 132 is attached to the support member 11 is not necessary, the manufacturing becomes easier as compared with the first embodiment.
Other functions and effects in this embodiment are substantially the same as those in the first embodiment.

FIG. 6 is a sectional view of a magnetized pulsar ring according to the third embodiment of the present invention.
In the magnetized pulsar ring 20 of the present embodiment, a fixing member 232 is fixed to the inner peripheral portion of the magnet member 15 by insert molding. Further, in the present embodiment, a plurality of fixing members 232 are provided in the circumferential direction with respect to the magnet member 15, or the fixed portion 234 is formed in an annular shape, and a cylindrical portion (radial direction regulating portion). A plurality of 233 and locking portions 235 are formed at intervals in the circumferential direction. A plurality of holes 40 are formed at intervals in the circumferential direction on the inner peripheral portion (boundary portion with the cylindrical portion 11 a) of the flange portion 11 c in the support member 11, and the locking portion 235 is formed in the hole 40. The cylindrical portion 233 is inserted, the cylindrical portion 233 is disposed at the radially inner end of the flange portion 11c, and the locking portion 235 is locked to the inner surface side of the flange portion 11c by caulking outward in the radial direction. doing.
Therefore, the present embodiment has the same effect as the above embodiment. However, in the present embodiment, it is necessary to form the hole 40 in the flange portion 11c in order to lock the locking portion 235, and a plurality of fixing members 232 or a plurality of cylindrical portions 233 and a plurality of locking portions 235 are provided. In view of these points, the first and second embodiments can be said to be more advantageous.

The present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope of the invention described in the claims.
For example, the adhesive 30 that bonds the support member 11 and the magnet member 15 may be a phenol resin or epoxy resin. In the first and second embodiments, a plurality of the locking portions 35 and 135 of the fixing members 32 and 132 may be provided at intervals in the circumferential direction. In the first and second embodiments, the fixing members 32 and 132 may not be formed in an annular shape but may be divided in the circumferential direction, with a gap in the circumferential direction of the magnet member 15. A plurality of fixing members 32 and 132 may be provided. Furthermore, holes 134a as described in the second embodiment may be formed in the fixed portions 34 and 234 of the fixing members 32 and 232 in the first and third embodiments.

  DESCRIPTION OF SYMBOLS 1: Rolling bearing apparatus, 3: Outer ring, 4: Rolling element, 5: Rolling element, 9: Inner ring (rotating member), 11: Slinger (support member), 11c: Flange part, 15: Magnet member, 20: Magnetization Pulsar ring, 30: Adhesive, 32, 132, 232: Fixing member, 33, 133, 233: Cylindrical part (radial direction regulating part), 34, 134, 234: Fixed part, 134a: Hole, 35, 135, 235 : Locking part

Claims (5)

A support member having an annular flange and fixed to the rotating body so as to be integrally rotatable;
A magnetized pulsar ring comprising an annular magnet member made of a synthetic resin, which is bonded to one side surface of the flange portion with an adhesive, and a large number of magnetic poles are arranged at predetermined intervals in the circumferential direction,
It is integrated with the magnet member by insert molding, and includes a metal fixing member that fixes the magnet member to the flange portion by locking to the flange portion,
The fixing member is
A radial restricting portion that is disposed at a radial end of the flange portion and restricts radial movement of the magnet member relative to the flange portion;
Provided at one end of the radial direction restricting portion in the axial direction and fixed to the magnet member;
A magnetizing pulsar ring comprising: an engaging portion that is provided at the other end portion in the axial direction of the radial restricting portion and engages with the other side surface of the flange portion.   The magnetized pulsar ring according to claim 1, wherein the locking portion is configured by plastically deforming one axial end portion of the radial restricting portion in a radial direction.   The magnetized pulsar ring according to claim 1 or 2, wherein a hole into which the magnet member enters is formed in the adherend portion. A method for producing a magnetized pulsar ring according to any one of claims 1 to 3,
By inserting the flange part and the fixing member into a mold in a state where the fixing member is attached to the flange part, and filling the mold with a molding material of a magnet member, the flange part and the fixing member And the magnet member is integrated by insert molding, The manufacturing method of the magnetization pulsar ring characterized by the above-mentioned. Inner ring,
An outer ring disposed radially outward of the inner ring;
A plurality of rolling elements provided between the inner ring and the outer ring so as to be capable of rolling;
A rolling bearing device comprising the magnetized pulsar ring according to any one of claims 1 to 3, which is attached to an outer peripheral surface of the inner ring.

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