JP4548026B2 - SEALING DEVICE WITH SENSOR AND ROLLING BEARING DEVICE USING THE SAME - Google Patents

Description

  The present invention relates to a sealing device and a rolling bearing device using the same, and more particularly to a sealing device with a sensor incorporating a sensor device and a rolling bearing device using the same.

  In automobiles, various information is required to perform the control, so the wheel side track member to which the wheels are attached, the vehicle side track member fixed to the vehicle body side, and the two track members are arranged. Although a sensor device is provided in a hub unit (rolling bearing device) having two rows of rolling elements, a rolling bearing device in which the sensor device is attached to a seal device has been proposed as a means for compactly attaching the sensor device. ing.

  As such a rolling bearing device, Patent Document 1 is attached to a rolling bearing having a fixed ring, a rotating ring, and a rolling element disposed between the two rings, and a metal core and a metal core fitted and fixed to the stationary ring. A fixed-side seal member having an elastic seal, a cylindrical portion fitted and fixed to the rotating wheel, and a rotary-side seal having a flange portion extending toward the fixed-side seal member connected to the axial end of the cylindrical portion A member, an elastic seal provided on the stationary seal member and in sliding contact with the rotational seal member, a sensor disposed on the stationary seal member, and a magnetized body disposed on the rotational seal member. It describes what is opposed to the magnetic body in the axial direction.

  In the rolling bearing device of Patent Document 1, first, a rotating side seal member provided with a magnetized body is press-fitted, then a fixed side seal member provided with an elastic seal is press-fitted, and then the sensor is fixed-side sealed. Since it is attached to the member, the press-fitting operation is required twice, and it is troublesome to attach the sensor to the fixed side seal member, so that there is a problem that it takes a lot of time to install the sensor device.

  Therefore, the sensor is resin-molded on the core of the fixed-side seal member, and the magnetized body is a seal device with a sensor provided on the side surface of the flange portion of the rotary-side seal member. The rotating side seal member with the magnetic part is assembled in advance (packed), and the end surface of the seal device with sensor is pushed with an appropriate jig to attach it to a rolling bearing or hub unit. It is conceivable to reduce the time required for the attachment process.

  FIG. 8 shows a configuration of a sensor-equipped seal device (a sensor-equipped seal device that is a comparative example of the present invention) that can be considered when the sensor is resin-molded on the core of the fixed-side seal member.

  This sensor-equipped sealing device (2) includes a fixed-side seal member (8) fixed to the vehicle body-side track member (3), a rotary-side seal member (9) fixed to the wheel-side track member (4), It comprises a sensor (11) provided on the stationary seal member (8) and a pulsar (10) provided on the rotary seal member (9).

  The fixed-side seal member (8) includes a metal core (21) fitted and fixed to the vehicle body-side track member (3), a resin member (22) integrated with the metal core (21) by insert molding, and a core A seal support ring (23) press-fitted into the gold (21), and an elastic seal (24) bonded to the seal support ring (23) and in sliding contact with the rotation-side seal member. By fixing the gold (21) with a resin, a fixed-side seal member (8) with a sensor (11) is obtained.

  The core metal (21) of the fixed-side seal member (8) includes a cylindrical portion (41) whose right portion is fitted and fixed to the inner diameter of the left end of the vehicle body-side track member (3), and the axially outer side of the cylindrical portion (41). It consists of the outward flange part (42) which continues to an edge part (left end part). The seal support ring (23) is connected to the cylindrical portion (43) fitted and fixed to the cylindrical portion (41) of the core metal (21) and the axially inner end (right end) of the cylindrical portion (43). It consists of an orientation flange (44). The elastic seal (24) is bonded to the outer surface and the outer peripheral edge of the flange portion (44) of the seal support ring (23).

  The resin member (22) has a perforated disk shape, and a projecting portion (22a) for providing a connector portion (27) is formed at one place on the circumference thereof. The left surface of the resin member (22) is the left end surface of the sealing device and is a flat surface. The axially inner portion of the outward flange portion (42) of the metal core (21) is also filled with resin, thereby suppressing the movement of the resin member (22) relative to the metal core (21).

  The rotation side seal member (9) is an outward facing to the cylindrical part (36) fitted into the shoulder part (17b) of the inner ring (17) of the wheel side raceway member (4) and the left end part of the cylindrical part (36). It consists of a flange part (37).

  The pulsar (10) is one in which N poles and S poles are alternately arranged to output a rotation signal, and is a magnetized body (bonded to the left surface of the outward flange portion (37) of the rotation side seal member (9)). 35). The rotation-side seal member (9) also serves as a support ring for the magnetized body (35), whereby the rotation-side seal member (9) with the magnetized body (35) is obtained.

  The sensor (11) is positioned in the resin member (22) so that its detection surface faces the magnetized body (35) from the outside in the axial direction.

The elastic seal (24) includes an axial lip (45) slidably in contact with the outward flange portion (37) of the rotation side seal member (9) from the axially inner side, and a slidable contact with the cylindrical portion (36) from the radially outer side. And first and second radial lips (46) and (47). The elastic seal (24) seals between the magnetized body (35) and the inside of the bearing.
JP-A-10-160744

  In the sealing device with a sensor of the comparative example shown in FIG. 8 and the rolling bearing device using the same, the time required for the mounting process of the sensor device can be significantly reduced, but the resin member indicated by B in FIG. Water is likely to enter from between the magnetized bodies, and the intruded water is likely to accumulate in the magnetized portion, and there is a concern that the sensor detection accuracy may deteriorate.

  The object of the present invention is to significantly reduce the time required for the sensor device mounting process, and to prevent external muddy water from entering the inside of the bearing and the magnetized portion, thereby ensuring sensor detection accuracy. Another object of the present invention is to provide a sensor-equipped sealing device and a rolling bearing device using the same.

The sealing device with a sensor according to the invention of claim 1 is fitted and fixed to the fixed member having a core metal fitted and fixed to the fixing member and an elastic seal attached to the core metal, and the rotating member. Rotation side seal member having a cylindrical portion and a flange portion extending toward the fixed side seal member continuously to the axial end of the cylinder portion, a sensor provided on the fixed side seal member, and a rotation side seal member In a sealing device with a sensor comprising a magnetized body, wherein the sensor and the magnetized body are opposed to each other in the axial direction, the core of the fixed-side seal member is a cylindrical portion in which the axially inner portion is fitted and fixed to the fixed member And a flange portion provided at an axially outer end portion of the cylindrical portion and extending toward the rotation-side seal member, and the sensor is resin-molded on the inner side in the axial direction than the flange portion of the metal core, and is rotated. The flange portion of the sealing member is brought into a position axially outward of the fixed-side seal member, the elastic seal is provided in the flange portion of the core has been brought into sliding contact with the rotated seal member, the core metal and the resin member Sealing means is provided at a required portion of the boundary part between the liquid gasket and the liquid gasket provided at the contact part between the resin part and the cored bar which are axially inward of the flange part of the cored bar. It is characterized by that.

According to a second aspect of the present invention, there is provided a sensor-equipped sealing device that is fixedly fitted to a rotating member and a fixed-side seal member having a metal core fitted and fixed to a fixed member and an elastic seal attached to the metal core. Rotation side seal member having a cylindrical portion and a flange portion extending toward the fixed side seal member continuously to the axial end of the cylinder portion, a sensor provided on the fixed side seal member, and a rotation side seal member In a sealing device with a sensor comprising a magnetized body, wherein the sensor and the magnetized body are opposed to each other in the axial direction, the core of the fixed-side seal member is a cylindrical portion in which the axially inner portion is fitted and fixed to the fixed member And a flange portion provided at an axially outer end portion of the cylindrical portion and extending toward the rotation-side seal member, and the sensor is resin-molded on the inner side in the axial direction than the flange portion of the metal core, and is rotated. The flange portion of the seal member is positioned on the outer side in the axial direction of the fixed-side seal member, and the elastic seal is provided on the flange portion of the core metal and is in sliding contact with the rotation-side seal member. Sealing means is provided at a required portion of the boundary portion between the two, and the sealing means is an adhesive layer interposed between the core metal and the resin.

According to a third aspect of the present invention, there is provided a sensor-equipped sealing device that is fitted and fixed to a rotating member and a fixed-side seal member that has a metal core fitted and fixed to the fixing member and an elastic seal attached to the metal core. Rotation side seal member having a cylindrical portion and a flange portion extending toward the fixed side seal member continuously to the axial end of the cylinder portion, a sensor provided on the fixed side seal member, and a rotation side seal member In a sealing device with a sensor comprising a magnetized body, wherein the sensor and the magnetized body are opposed to each other in the axial direction, the core of the fixed-side seal member is a cylindrical portion in which the axially inner portion is fitted and fixed to the fixed member And a flange portion provided at an axially outer end portion of the cylindrical portion and extending toward the rotation-side seal member, and the sensor is resin-molded on the inner side in the axial direction than the flange portion of the metal core, and is rotated. The flange portion of the seal member is positioned on the outer side in the axial direction of the fixed-side seal member, and the elastic seal is provided on the flange portion of the core metal and is in sliding contact with the rotation-side seal member. A sealing means is provided at a required portion of the boundary portion with the cylindrical portion of the cored bar, the small-diameter portion fitted and fixed to the fixing member, and the large-diameter portion connected to the outer side in the axial direction of the small-diameter portion via a step portion. The flange portion of the cored bar is provided at the axially outer end of the large-diameter portion, and between the stepped portion of the cylindrical part of the cored bar and the resin member, and between the flanged part of the cored bar and the resin member. Between these, an O-ring as a sealing means is provided, respectively.

According to a fourth aspect of the present invention, there is provided a sensor-equipped sealing device that is fitted and fixed to a rotating member and a fixed-side seal member having a core metal fitted and fixed to the fixing member and an elastic seal attached to the core metal. Rotation side seal member having a cylindrical portion and a flange portion extending toward the fixed side seal member continuously to the axial end of the cylinder portion, a sensor provided on the fixed side seal member, and a rotation side seal member In a sealing device with a sensor comprising a magnetized body, wherein the sensor and the magnetized body are opposed to each other in the axial direction, the core of the fixed-side seal member is a cylindrical portion in which the axially inner portion is fitted and fixed to the fixed member And a flange portion provided at an axially outer end portion of the cylindrical portion and extending toward the rotation-side seal member, and the sensor is resin-molded on the inner side in the axial direction than the flange portion of the metal core, and is rotated. The flange portion of the seal member is positioned on the outer side in the axial direction of the fixed-side seal member, and the elastic seal is provided on the flange portion of the core metal and is in sliding contact with the rotation-side seal member. The sealing means is provided at a required portion of the boundary portion between the flange portion of the core metal provided with the elastic seal and the cylindrical portion of the core metal fitted and fixed to the fixing member is an axis of the cylindrical portion. It is a separate member with a resin filling gap between the outer end in the direction and the flange, and a bent portion that is bent to the opposite side of the rotating member is integrated with the axial outer end of the cylindrical portion of the cored bar. O-rings as sealing means are provided between the bent portion of the cored bar and the resin member, and between the flange portion provided with the elastic seal and the resin member, respectively. It is what.

  The fixing member is, for example, an outer ring or an inner ring of a rolling bearing, and the rotating member is, for example, an inner ring or an outer ring of a rolling bearing, but is not limited thereto.

  The cylindrical portion of the core metal may be fitted and fixed to either the inner diameter or the outer diameter of the fixing member.

  The mandrel may be formed by one rigid ring or may be formed by two or more rigid rings. Regardless of whether the cored bar is formed of one rigid ring or two or more rigid rings, the cored bar has at least a cylindrical portion that is press-fitted into the fixing member and a flange portion that is provided with an elastic seal. The

  The magnetized body is one in which N poles and S poles are alternately arranged to output a rotation signal, and may be directly bonded to the rotating side seal member, and an annular support member (magnetized body support ring) and It may be used in the form of a pulsar ring consisting of a magnetized body bonded to this. The sensor is, for example, a magnetic sensor, but is not limited thereto.

  The core metal and the resin are insert-molded. At this time, at least a part of the inward flange portion or the outward flange portion of the core metal is positioned in the resin, thereby suppressing the movement of the resin with respect to the core metal.

  This sensor-equipped sealing device is attached to a rolling bearing or a hub unit by assembling all the members first and then pushing the end surface with an appropriate jig.

  Of course, the sensor may be arranged in a portion surrounded by the cylindrical portion and the flange portion of the cored bar, but a through hole is provided in an axially outer portion of the cylindrical part of the cored bar, and the sensor is disposed in the through hole. More preferably, it is resin-molded in the inserted state. In this case, it is more preferable that a plurality of through holes are provided and the remaining through holes are filled with resin. If it does in this way, it will become the composition by which a metal core (metal part) does not intervene between a sensor and a magnetism object, and sensor detection accuracy can be improved further. In this case, the air gap between the resin surface and the magnetized body is, for example, about 0.1 mm. The sensor may be covered with resin, or the detection surface of the sensor may be exposed from the resin. By adopting the latter configuration, the gap between the detection surface of the sensor and the magnetized body can be further reduced, and the detection accuracy can be further improved. The shape of the through hole is preferably a square corresponding to the sensor (sensor IC), but is not limited to this because it is resin-molded, and may be a circle or an ellipse. In order to install the sensor, the number of through-holes may be one, but by making a plurality of through-holes and filling each hole with resin, the movement of the resin relative to the core metal is suppressed, and the core metal The resin is prevented from coming off from

  The sensor-equipped sealing device includes, for example, a resin-molded cored bar and a sensor to which an elastic seal is attached, and incorporates the sensor into a rotation-side seal member (slinger), and then a magnetized body support ring (pulsar ring) provided with a magnetized body Can be obtained by press-fitting into the rotation-side seal member. For mounting to the rolling bearing device, the axial side outer surface and the resin end surface of the rotation side seal member of the sensor-equipped seal device are simultaneously pressed with an appropriate jig, and the fixed side seal member and the rotation side seal member are turned into the rolling bearing. This can be done by press-fitting. In this way, assembly is good and cost reduction is possible, and the positioning of the magnet support ring with respect to the rotation-side seal member can be reliably performed, so that the positioning accuracy between the sensor and the magnet is improved. Since the rotation-side seal member can be reliably positioned with respect to the rolling bearing device, it becomes easy to manage the position of the seal, and thereby both the sealing performance and the sensor detection accuracy can be improved.

A rolling bearing device according to a fifth aspect of the present invention is a rolling bearing having a fixed ring, a rotating ring, and a rolling element disposed between the two rings, a core metal fitted and fixed to the fixed ring, and an elastic seal attached to the core metal. A fixed-side seal member having a cylindrical portion that is fitted and fixed to the rotating wheel, and a rotary-side seal member that has a flange portion that extends toward the fixed-side seal member in an axial direction end portion of the cylindrical portion; In a rolling bearing device comprising a sensor provided on a fixed-side seal member and a magnetized body provided on a rotary-side seal member, wherein the sensor and the magnetized body are opposed in the axial direction, the core of the fixed-side seal member The gold has a cylindrical portion whose inner portion in the axial direction is fitted and fixed to the fixing member, and a flange portion that is provided at an outer end portion in the axial direction of the cylindrical portion and extends toward the rotation-side seal member. Core franc The flange part of the rotation side seal member is positioned on the axis direction outer side of the fixed side seal member, and the elastic seal is provided on the flange part of the metal core to be rotated side. The sealing member is slidably brought into contact with the sealing member, and sealing means is provided at a required portion of the boundary portion between the metal core and the resin member, and the sealing means is a resin portion located on the inner side in the axial direction from the flange portion of the metal core. it is characterized in that as a liquid gasket, which is provided on the contact portion with the metal core.

A rolling bearing device according to a sixth aspect of the present invention is a rolling bearing having a fixed ring, a rotating ring, and rolling elements disposed between the two rings, a core metal fitted and fixed to the fixed ring, and an elastic seal attached to the core metal. A fixed-side seal member having a cylindrical portion that is fitted and fixed to the rotating wheel, and a rotary-side seal member that has a flange portion that extends toward the fixed-side seal member in an axial direction end portion of the cylindrical portion; In a rolling bearing device comprising a sensor provided on a fixed-side seal member and a magnetized body provided on a rotary-side seal member, wherein the sensor and the magnetized body are opposed in the axial direction, the core of the fixed-side seal member The gold has a cylindrical portion whose inner portion in the axial direction is fitted and fixed to the fixing member, and a flange portion that is provided at an outer end portion in the axial direction of the cylindrical portion and extends toward the rotation-side seal member. Core franc The flange part of the rotation side seal member is positioned on the axis direction outer side of the fixed side seal member, and the elastic seal is provided on the flange part of the metal core to be rotated side. The seal member is slidably contacted, and a seal means is provided at a required portion of the boundary portion between the core metal and the resin member, and the seal means is an adhesive layer interposed between the core metal and the resin. It is characterized by being .

A rolling bearing device according to a seventh aspect of the present invention is a rolling bearing having a fixed ring, a rotating ring, and a rolling element disposed between the two rings, a core metal fitted and fixed to the fixed ring, and an elastic seal attached to the core metal. A fixed-side seal member having a cylindrical portion that is fitted and fixed to the rotating wheel, and a rotary-side seal member that has a flange portion that extends toward the fixed-side seal member in an axial direction end portion of the cylindrical portion; In a rolling bearing device comprising a sensor provided on a fixed-side seal member and a magnetized body provided on a rotary-side seal member, wherein the sensor and the magnetized body are opposed in the axial direction, the core of the fixed-side seal member The gold has a cylindrical portion whose inner portion in the axial direction is fitted and fixed to the fixing member, and a flange portion that is provided at an outer end portion in the axial direction of the cylindrical portion and extends toward the rotation-side seal member. Core franc The flange part of the rotation side seal member is positioned on the axis direction outer side of the fixed side seal member, and the elastic seal is provided on the flange part of the metal core to be rotated side. The seal member is slidably contacted, and a sealing means is provided at a required portion of the boundary portion between the core metal and the resin member, and the cylindrical portion of the core metal is a small diameter portion fitted and fixed to the fixing member, And a large-diameter portion that continues to the axially outer side of the small-diameter portion via a step portion, and the flange portion of the cored bar is provided at the axially outer end of the large-diameter portion, to and between the flange portion of the core metal and the resin member with the resin member, and is characterized in that the O-ring as a sealing means are provided respectively.

A rolling bearing device according to an eighth aspect of the present invention is a rolling bearing having a fixed ring, a rotating ring, and rolling elements disposed between the two rings, a core metal fitted and fixed to the fixed ring, and an elastic seal attached to the core metal. A fixed-side seal member having a cylindrical portion that is fitted and fixed to the rotating wheel, and a rotary-side seal member that has a flange portion that extends toward the fixed-side seal member in an axial direction end portion of the cylindrical portion; In a rolling bearing device comprising a sensor provided on a fixed-side seal member and a magnetized body provided on a rotary-side seal member, wherein the sensor and the magnetized body are opposed in the axial direction, the core of the fixed-side seal member The gold has a cylindrical portion whose inner portion in the axial direction is fitted and fixed to the fixing member, and a flange portion that is provided at an outer end portion in the axial direction of the cylindrical portion and extends toward the rotation-side seal member. Core franc The flange part of the rotation side seal member is positioned on the axis direction outer side of the fixed side seal member, and the elastic seal is provided on the flange part of the metal core to be rotated side. It is slidably contacted with the seal member, and a sealing means is provided at a required portion of the boundary between the metal core and the resin member, and it fits into the flange portion of the metal core and the fixing member provided with an elastic seal. The cylindrical portion of the cored bar to be fixed is a separate member having a resin filling gap between the axially outer end portion of the cylindrical portion and the flange portion, and the axially outer end portion of the cylindrical portion of the cored bar. The bent portion bent to the opposite side of the rotating member is integrally formed, and between the bent portion of the core metal and the resin member and between the flange portion and the resin member provided with the elastic seal, O-rings are provided as sealing means. It is characterized in that there.

  This rolling bearing device is preferably used as a hub unit for an automobile by having a fixed wheel as a vehicle body side race member having a mounting portion for a vehicle body and a rotating wheel as a wheel side race member having a wheel attachment portion. The

  According to the sealing device with a sensor of the present invention, the sensor is resin-molded on the core of the fixed-side seal member, and the magnetized body is provided on the rotating-side seal member. The rotation-side seal member with a seal is assembled in advance (packed), and the end surface of this seal device with a sensor can be attached to a rolling bearing or hub unit by pushing with an appropriate jig. The time required for the attachment process can be greatly reduced. Further, the cylindrical portion of the core metal of the fixed side seal member is fitted and fixed to the fixed member, and the cylindrical portion of the rotary side seal member is fitted and fixed to the rotary member, and the gap between the flange portion of the core metal and the rotary side seal member is fixed. Since it is sealed by the elastic seal, water intrusion into the bearing is prevented. Then, by providing a sealing means at a required location at the boundary between the metal core and the resin member, water enters from the gap between the resin and the metal core due to the difference in expansion coefficient between the resin and the metal core (metal). Is also prevented, and a more complete sealing property can be obtained.

  According to the rolling bearing device of the present invention, the sensor is resin-molded on the core of the fixed-side seal member, and the magnetized body is provided on the rotary-side seal member. Therefore, the fixed-side seal member with the sensor and the magnetized portion are provided. A rolling bearing device with a sensor can be obtained by assembling the rotating side seal member in advance (packing) and pressing the end face of the seal device with a sensor with an appropriate jig. The time required for the attachment process can be greatly reduced. Further, the cylindrical portion of the core metal of the fixed side seal member is fitted and fixed to the fixed member, and the cylindrical portion of the rotary side seal member is fitted and fixed to the rotary member, and the gap between the flange portion of the core metal and the rotary side seal member is fixed. Since it is sealed by the elastic seal, water intrusion into the bearing is prevented. Then, by providing a sealing means at a required location at the boundary between the metal core and the resin member, water enters from the gap between the resin and the metal core due to the difference in expansion coefficient between the resin and the metal core (metal). Is also prevented, and a more complete sealing property can be obtained.

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

  1 to 3 show a first embodiment of a sensor-equipped seal device and a rolling bearing device using the same according to the present invention. In the following description, the left and right refer to the left and right in FIG. Note that the left is inside the vehicle and the right is outside the vehicle.

  A rolling bearing device according to the present invention includes a hub unit (1) and a sensor according to the present invention in which a pulsar (10) and a sensor (11) are integrated with a seal device (7) at the left end of the hub unit (1). And a sealing device (2).

  The hub unit (1) is arranged in two rows between the vehicle body side track member (3) fixed to the vehicle body side, the wheel side track member (4) to which the wheel is attached, and both members (3) and (4). A ball (5), which is a plurality of rolling elements, and a cage (6) for holding each row of balls (5) are provided.

  The vehicle body side raceway member (3) has a function of an outer ring (fixed ring) of the bearing. A cylindrical part (12) in which two rows of outer ring raceways are formed on the inner peripheral surface, and a cylindrical part (12 ) And a flange portion (13) attached to the suspension device (vehicle body) with a bolt.

  The wheel side raceway member (4) has a large diameter portion (15) having a first raceway groove (15a) and a small diameter portion (16) having an outer diameter smaller than the diameter of the first raceway groove (15a). The hollow shaft (14), and the inner ring whose right surface is in close contact with the left surface of the large diameter portion (15) of the hollow shaft (14), and is fitted to the outer diameter of the small diameter portion (16) of the hollow shaft (14). (17) Near the right end of the hollow shaft (14), there is provided a flange portion (18) to which a plurality of bolts (19) for attaching a wheel are fixed. The inner ring (17) is formed with a raceway groove (17a) so as to be parallel to the raceway groove (15a) of the hollow shaft (14), and a shoulder (17b) is formed on the left side of the inner ring (17). Has been. Between the right end portion of the vehicle body side raceway member (3) and the hollow shaft (14), a seal member (20) made of an elastic seal and a cored bar is provided.

  The sensor-equipped sealing device (2) includes a fixed-side seal member (8) fixed to the vehicle body-side track member (3), and a rotary-side seal member (9) fixed to the wheel-side track member (4). It comprises a sensor (11) provided on the side seal member (8) and a pulsar (10) provided on the rotation side seal member (9).

  In FIG. 1, (25) indicates a knuckle and (29) indicates a constant velocity joint (CVJ). The knuckle (25) is provided with a notch (26) for taking out the sensor wiring to the outside, and the connector part (27) having the connector pin (28) protrudes outward from the notch (26). It has been.

  Hereinafter, the sensor-equipped sealing device (2) will be described in more detail with reference to FIG. 2 and FIG.

  The sensor-equipped sealing device (2) includes a fixed-side seal member (8) fixed to the vehicle body-side track member (3), and a rotary-side seal member (9) fixed to the wheel-side track member (4). It comprises a sensor (11) provided on the side seal member (8) and a pulsar (10) provided on the rotation side seal member (9).

  The fixed-side seal member (8) includes a metal core (51) fitted and fixed to the vehicle body-side track member (3), a resin member (52) integrated with the metal core (51) by insert molding, and a core And an elastic seal (53) that is bonded to the gold (51) and is in sliding contact with the rotation-side seal member (9), and the sensor (11) is resin-molded on the metal core (51), so that the sensor (11 ) With a fixed side seal member (8) is obtained.

  The metal core (51) of the fixed-side seal member (8) includes a cylindrical portion (54) whose right portion is fitted and fixed to the inner diameter of the left end of the vehicle body-side track member (3), and the axial direction of the cylindrical portion (54). It consists of an inward flange portion (55) connected to the outer end portion (left end portion). The elastic seal (53) is bonded to the inner peripheral edge of the inward flange portion (55) of the core metal (51).

  The resin member (52) has a perforated disk shape, and a projecting portion (52a) for providing the connector portion (27) is formed at one place on the circumference thereof. The left surface of the resin member (52) is the left end surface of the sealing device and is a flat surface. The axially inner portion of the inward flange portion (55) of the core metal (51) is also filled with resin, thereby suppressing the movement of the resin member (52) relative to the core metal (51).

  The rotation-side seal member (9) is called a slinger, and a cylindrical portion (56) whose right portion is fitted into the shoulder (17b) of the inner ring (17) of the wheel-side race member (4) and It consists of an outward flange part (57) connected to the left end part of the cylindrical part (56). The outer peripheral edge portion (57a) of the outward flange portion (57) is slightly bent inward in the axial direction so as to prevent entry of muddy water.

  The pulsar (10) is one in which N poles and S poles are alternately arranged and outputs a rotation signal. The cylindrical part (59) fitted and fixed to the cylindrical part (56) of the rotary side seal member (9). And a magnet support ring (58) consisting of an outward flange portion (60) connected to the axially inner end of the cylindrical portion (59), and a left surface of the outward flange portion (60) of the magnet support ring (58). And a magnetized body (61) provided. The right end surface of the cylindrical portion (56) of the rotation side seal member (9) and the right surface of the outward flange portion (60) of the magnetized body support ring (58) are substantially flush with each other. By rotating the magnetizing body support ring (58) into the rotating side seal member (9), the rotating side seal member (9) with the magnetized body (61) is obtained. The support ring (58) is made of a magnetic metal such as SUS430. The magnetized body (61) is formed by magnetizing magnetic powder using rubber as a binder.

  As shown in detail in FIG. 3, the cylindrical portion (54) of the metal core (51) of the fixed-side seal member (8) is provided with a plurality of through holes (54a) having a square cross section at substantially equal intervals in the circumferential direction. The sensor (11) is inserted into one of these holes (54a) so that its detection surface faces the magnetized body (61) of the pulsar (10) from the outside in the axial direction, It is located in the resin member (52). The remaining through-hole (54a) is filled with resin, thereby suppressing the movement of the resin member (52) relative to the cored bar (51). The gap between the left surface of the magnetized body (61) and the right surface of the main body portion of the resin member (52) is as small as possible (for example, about 0.1 mm) as long as they do not contact each other. FIG. 2 shows the case where the sensor (11) is covered with resin, but the right side of the sensor (11) and the right side of the resin member are arranged so that the sensor (11) approaches the magnetized body (61). And the gap between the detection surface of the sensor (11) and the magnetized body (61) may be further reduced. The shape of the through hole (54a) is not particularly limited, and the number thereof can be changed as appropriate. The number of through holes (54a) may be only one for inserting the sensor (11).

  The elastic seal (53) includes first and second axial lips (62) and (63) which are in sliding contact with the outward flange portion (57) of the rotation side seal member (9) from the inside in the axial direction, and the cylindrical portion (56). ) Have first and second radial lips (64) and (65) in sliding contact with each other from the outside in the radial direction. The elastic seal (53) provides a seal between the outside of the bearing and the inside of the bearing.

  Contact between the portion of the resin member (52) axially inward of the inward flange portion (55) of the core metal (51) and the cylindrical portion (54) and inward flange portion (55) of the core metal (51) 2, exposed to the outside at the boundary between the resin member (52) and the two locations indicated by reference numeral (66) in FIG. 2 (the inner surface of the inward flange portion (55) of the core metal (51) and the resin member (52). And a liquid gasket (66) such as silicone as a sealing means on the entire circumference of the portion of the core portion (51) and the radially inner surface of the cylindrical portion (54) of the core portion (51) and the resin member (52). Is provided. The liquid gasket (66) can be provided after resin molding by applying a fluid material at room temperature to the joint surface to exhibit a sealing property after a certain period of time to prevent intrusion of water or the like.

  According to this sensor-equipped sealing device (2), the intrusion of water into the bearing is almost completely prevented by the cored bar (51), the rotating side sealing member (slinger) (9) and the elastic seal (53). However, since the expansion coefficient is different between the resin member (resin) (52) and the metal core (metal) (51), the resin member (52) expands and contracts with respect to the metal core (51) due to the temperature change. 52) and a metal core (51), a gap is generated, and when it is used for a long time, there is a concern that water may enter through this gap. On the other hand, in the first embodiment, by adding a liquid gasket (66) as a sealing means between the core metal (51) and the resin member (52), the core metal (51) and the resin member are added. External muddy water and the like from the boundary surface with (52) is completely prevented from entering the inside of the bearing and the magnetized body (61). Therefore, not only the sealing performance is ensured over a long period of time, but also the sensor detection accuracy is improved because there is no water intrusion into the magnetized body (61).

  The liquid gasket (66) can be mixed with a primer or an adhesion improver (silane coupling agent) to improve adhesion.

  FIG. 4 shows a second embodiment of the sensor-equipped sealing device according to the present invention. Instead of the liquid gasket (66), a sealing means is provided between the metal core (51) and the resin member (52). An adhesive layer (67) is provided. Except for the point that the liquid gasket (66) is changed to the adhesive layer (67), the configuration is the same as that of the first embodiment. The adhesive layer (67) is provided on at least the axially inner surface of the inward flange portion (55) of the core metal (51) and the radially inner surface of the cylindrical portion (54) of the core metal (51). Preferably, it is provided on all surfaces where the core metal (51) and the resin member (52) are in contact. This adhesive layer (67) can be formed by applying a resin adhesive (primer) to the metal core (51) before resin molding. Therefore, processing after resin molding becomes unnecessary. In the second embodiment, by adding an adhesive layer (67) as a sealing means between the core metal (51) and the resin member (52), the core metal (51) and the resin member (52 ) From the boundary surface to the inside of the bearing and the magnetized body (61) is completely prevented. Therefore, not only the sealing performance is ensured over a long period of time, but also the sensor detection accuracy is improved because there is no water intrusion into the magnetized body (61).

  FIG. 5 shows a third embodiment of the sensor-equipped sealing device according to the present invention. A cored bar (71) includes a small-diameter portion (74) fitted and fixed to the vehicle body-side track member (3), and a small-diameter portion. A cylindrical part (72) consisting of a large diameter part (76) connected to the outside in the axial direction of (74) via a step part (75), and an axially outer end part of the large diameter part (76) of the cylindrical part (72) And an inward flange portion (73) provided on the inner surface. And between the stepped portion (75) of the cylindrical portion (72) of the core metal (71) and the resin member (52) and between the inward flange portion (73) of the core metal (71) and the resin member (52). Between them, O-rings (77) and (78) are provided as sealing means, respectively. The through hole (76a) corresponding to the insertion hole (54a) of the first embodiment is opened in the large diameter portion (76), and the sensor (11) is inserted through the through hole (76a). Resin molded. Of course, instead of the O-rings (77) and (78), an annular elastic body whose cross-sectional shape is not circular may be used. In the third embodiment, an O-ring (77), (78) as a sealing means or an elastic body corresponding thereto is added between the cored bar (51) and the resin member (52), thereby providing a core. External muddy water or the like from the boundary surface between the gold (71) and the resin member (52) is completely prevented from entering the inside of the bearing and the magnetized body (61). Therefore, not only the sealing performance is ensured over a long period of time, but also the sensor detection accuracy is improved because there is no water intrusion into the magnetized body (61).

  FIG. 6 shows a fourth embodiment of the sensor-equipped sealing device according to the present invention. In the metal core (51) shown in FIG. 2, the mounting flange portion (55) of the elastic seal (53) and the fitting cylindrical portion are shown. In this embodiment, the mounting flange portion (82) of the elastic seal (53) and the fitting cylindrical portion (83) are separated from each other by having a resin-filling gap therebetween. It is a member. That is, the cored bar comprises a first rigid ring (81) and a second rigid ring (82), and the first rigid ring (81) is a cylindrical portion (83) fitted and fixed to the vehicle body side raceway member (3). ) And an outward bent portion (84) integrally formed at the axially outer end of the cylindrical portion (83), and the second rigid ring (82) has an inward flange portion (73) in FIG. ) And a perforated disk which is a separate member from the first rigid ring (81), and an elastic seal (53) is provided on the inner peripheral edge thereof. Then, an O as a sealing means is provided between the bent portion (84) of the first rigid ring (81) and the resin member (52) and between the second rigid ring (82) and the resin member (52). Rings (85) and (86) are provided. The sensor (11) is resin-molded while being inserted between the left end portion of the cylindrical portion (83) of the first rigid ring (81) and the second rigid ring (82). Of course, instead of the O-rings (85) and (86), a circular elastic body having a non-circular cross section may be used. In the fourth embodiment, an O-ring (85) (86) serving as a sealing means is provided between the first rigid ring (81) and the second rigid ring (82) constituting the core metal and the resin member (52). ) Or by adding an elastic body equivalent to this, external muddy water and the like enter the bearing and magnetized body (61) from the boundary surface between the core metal (81) (82) and the resin member (52). Is completely prevented. Therefore, not only the sealing performance is ensured over a long period of time, but also the sensor detection accuracy is improved because there is no water intrusion into the magnetized body (61).

  In each of the first to fourth embodiments, the cylindrical portions (54), (74), and (83) of the core bar (51) are fitted and fixed to the inner diameter of the vehicle body side track member (3) that is the outer ring. However, the cylindrical portions (54), (74) and (83) of these core bars (51) may be fitted to the outer diameter of the vehicle body side raceway member (3) which is an outer ring. An example is shown in FIG. In the following description, the same or substantially the same configuration as in FIG.

  In the fifth embodiment shown in FIG. 7, in the metal core (51) shown in FIG. 2, the fitting cylindrical portion (54) is fitted and fixed to the inner diameter of the vehicle body side track member (3). The fitting cylindrical portion (54) is fitted and fixed to the outer diameter of the vehicle body side race member (3). That is, in the vehicle body side raceway member (3), an annular left protrusion (3a) is formed in a portion that holds the ball (5) .In this embodiment, the fitting cylindrical portion (54) The outer diameter is larger than that of the other embodiments, and is fitted and fixed to the outer diameter of the left protrusion (3a). Then, similarly to the first embodiment shown in FIG. 2, the portion of the resin member (52) and the cored bar (51) located on the inner side in the axial direction from the inward flange part (55) of the cored bar (51). A liquid gasket (66) such as silicone as a sealing means is provided at the contact portion with the cylindrical portion (54) and the inward flange portion (55), that is, at the two peripheries indicated by reference numeral (66) in FIG. Is provided.

  Therefore, according to the sensor-equipped sealing device (2) of the fifth embodiment, by adding the liquid gasket (66) as the sealing means between the cored bar (51) and the resin member (52), the core External muddy water or the like from the boundary surface between the gold (51) and the resin member (52) is completely prevented from entering the inside of the bearing or the magnetized body (61). Therefore, not only the sealing performance is ensured over a long period of time, but also the sensor detection accuracy is improved because there is no water intrusion into the magnetized body (61).

  In the fifth embodiment, the one corresponding to the first embodiment has been described, but the second embodiment shown in FIG. 2, the third embodiment shown in FIG. 5, and the one shown in FIG. In each of the fourth embodiments, the fitting cylindrical portions (54), (74), and (83) can be fitted and fixed to the left protruding portion (3a) of the outer diameter of the vehicle body side raceway member (3). Of course you can.

  The sensor-equipped sealing device (2) of each of the above embodiments is pre-assembled by combining the fixed-side seal member (8) and the rotating-side seal member (9), and then the end surface of the sensor-equipped sealing device (2) By pressing the left surface of the resin member (52) and the outward flange portion (57) of the rotation side seal member (9) with an appropriate jig, it can be attached to the hub unit (1). The time required for the sensor device mounting process can be greatly reduced. In each of these embodiments, when pressing with a jig, not only the left surface of the resin member (52) but also the outward flange portion (57) of the rotation side seal member (9) can be pressed. As compared with the comparative example shown in FIG. 8, the magnet body support ring (58) and therefore the magnet body (61) can be positioned with respect to the rotating side seal member (9), so that the sensor (11) and the magnet body (61 ) And the positioning of the rotation-side seal member (9) with respect to the hub unit (1) can be performed reliably, so that the position of the seal can be easily managed.

  Needless to say, the sealing means other than those (66) (67) (77) (78) (85) (86) exemplified in the first to fourth can be used. In addition, the hub unit (1) of the above embodiment is shown for a drive wheel in which the hollow shaft (14) is provided with serrations so that the shaft portion of the constant velocity joint can be inserted. Of course, it can be used for a driven wheel by replacing the rotating shaft of the driving wheel. Although the hub unit (1) has been described as an example, the sensor-equipped sealing device (2) is also applicable to various rolling bearing devices other than the hub unit (1) and various rotating devices that perform relative rotation. be able to.

FIG. 1 is a longitudinal sectional view showing a first embodiment of a sealing device with a sensor and a rolling bearing device according to the present invention. FIG. 2 is an enlarged longitudinal sectional view of a portion where the sensor is arranged. FIG. 3 is a perspective view of a metal core used in the first embodiment of the sealing device with a sensor and the rolling bearing device according to the present invention. FIG. 4 is an enlarged longitudinal sectional view showing a second embodiment of the sealing device with a sensor and the rolling bearing device according to the present invention. FIG. 5 is an enlarged longitudinal sectional view showing a third embodiment of the sensor-equipped sealing device and the rolling bearing device according to the present invention. FIG. 6 is an enlarged longitudinal sectional view showing a fourth embodiment of the sensor-equipped sealing device and the rolling bearing device according to the present invention. FIG. 7 is an enlarged longitudinal sectional view showing a fifth embodiment of the sealing device with a sensor and the rolling bearing device according to the present invention. FIG. 8 is an enlarged longitudinal sectional view showing a comparative example of the sealing device with a sensor and the rolling bearing device according to the present invention.

(1) Hub unit (rolling bearing device)
(2) Sealing device with sensor
(3) Car body side raceway member (fixing member = bearing fixed ring)
(4) Wheel-side track member (Rotating member = Bearing rotating wheel)
(5) Ball (rolling element)
(8) Fixed seal member
(9) Rotating side seal member
(10) Pulsa
(11) Sensor
(51) Core
(52) Resin member
(53) Elastic seal
(54) Cylindrical part
(55) Inward flange
(56) Cylindrical part
(57) Outward flange
(61) Magnetized body
(66) Liquid gasket (sealing means)
(67) Adhesive layer (sealing means)
(71) Core
(72) Cylindrical part
(73) Inward flange
(74) Small diameter part
(75) Stepped part
(76) Large diameter part
(77) (78) O-ring
(81) First rigid ring
(82) Second rigid ring (flange for attaching elastic seal)
(83) Cylindrical part
(84) Bending part
(85) (86) O-ring

Claims (9)

A fixed-side seal member having a metal core fitted and fixed to the fixed member and an elastic seal attached to the metal core, a cylindrical part fitted and fixed to the rotating member, and an axial end of the cylindrical part A rotating side seal member having a flange portion extending toward the fixed side seal member, a sensor provided on the fixed side seal member, and a magnetized body provided on the rotary side seal member. In the sealing device with sensor facing in the axial direction,
The core metal of the fixed-side seal member includes a cylindrical portion in which an axially inner portion is fitted and fixed to the fixed member, and a flange portion that is provided at an axially outer end of the cylindrical portion and extends toward the rotary-side seal member. The sensor is resin-molded axially inside the flange portion of the core metal, the flange portion of the rotation side seal member is positioned outside the axial direction of the fixed side seal member, and the elastic seal is Provided on the flange portion of the gold and slidably contacted with the rotary side seal member , a seal means is provided at a required portion of the boundary portion between the core metal and the resin member, and the seal means is a flange of the core metal. sensor-equipped seal device according to claim liquid gasket der Rukoto provided a contact portion between the resin portion and the metal core in the axial direction inward from the section. A fixed-side seal member having a metal core fitted and fixed to the fixed member and an elastic seal attached to the metal core, a cylindrical part fitted and fixed to the rotating member, and an axial end of the cylindrical part A rotating side seal member having a flange portion extending toward the fixed side seal member, a sensor provided on the fixed side seal member, and a magnetized body provided on the rotary side seal member. In the sealing device with sensor facing in the axial direction,
The core metal of the fixed-side seal member includes a cylindrical portion in which an axially inner portion is fitted and fixed to the fixed member, and a flange portion that is provided at an axially outer end of the cylindrical portion and extends toward the rotary-side seal member. The sensor is resin-molded axially inside the flange portion of the core metal, the flange portion of the rotation side seal member is positioned outside the axial direction of the fixed side seal member, and the elastic seal is It is provided on the gold flange portion and is brought into sliding contact with the rotation side seal member, and a sealing means is provided at a required portion of the boundary portion between the core metal and the resin member. A sensor-equipped sealing device, wherein the adhesive layer is interposed between the two. A fixed-side seal member having a metal core fitted and fixed to the fixed member and an elastic seal attached to the metal core, a cylindrical part fitted and fixed to the rotating member, and an axial end of the cylindrical part A rotating side seal member having a flange portion extending toward the fixed side seal member, a sensor provided on the fixed side seal member, and a magnetized body provided on the rotary side seal member. In the sealing device with sensor facing in the axial direction,
The core metal of the fixed-side seal member includes a cylindrical portion in which an axially inner portion is fitted and fixed to the fixed member, and a flange portion that is provided at an axially outer end of the cylindrical portion and extends toward the rotary-side seal member. The sensor is resin-molded axially inside the flange portion of the core metal, the flange portion of the rotation side seal member is positioned outside the axial direction of the fixed side seal member, and the elastic seal is It is provided on the gold flange and is in sliding contact with the rotary side seal member. Sealing means is provided at the required location at the boundary between the metal core and the resin member, and the cylindrical metal core is fixed. It consists of a small-diameter part fitted and fixed to the member, and a large-diameter part connected to the axially outer side of the small-diameter part via a step part, and the flange part of the core bar is provided at the axially outer end of the large-diameter part , Between the step part of the cylindrical part of the cored bar and the resin member and the core Between the flange portion and the resin member, the sensor with the sealing device, characterized in that O-ring is provided as a respective sealing means. A fixed-side seal member having a metal core fitted and fixed to the fixed member and an elastic seal attached to the metal core, a cylindrical part fitted and fixed to the rotating member, and an axial end of the cylindrical part A rotating side seal member having a flange portion extending toward the fixed side seal member, a sensor provided on the fixed side seal member, and a magnetized body provided on the rotary side seal member. In the sealing device with sensor facing in the axial direction,
The core metal of the fixed-side seal member includes a cylindrical portion in which an axially inner portion is fitted and fixed to the fixed member, and a flange portion that is provided at an axially outer end of the cylindrical portion and extends toward the rotary-side seal member. The sensor is resin-molded axially inside the flange portion of the core metal, the flange portion of the rotation side seal member is positioned outside the axial direction of the fixed side seal member, and the elastic seal is A core provided on the gold flange and slidably contacted with the rotary side seal member, and provided with a sealing means at a required portion of the boundary between the metal core and the resin member, and provided with an elastic seal The gold flange portion and the cylindrical portion of the core metal fitted and fixed to the fixing member are separate members having a resin filling gap between the axially outer end portion of the cylindrical portion and the flange portion. At the outer end of the cylindrical part in the axial direction, As the sealing means, a bent portion bent to the side is formed integrally, and between the bent portion of the cored bar and the resin member and between the flange portion provided with the elastic seal and the resin member, respectively. A sealing device with a sensor , wherein an O-ring is provided. A fixed ring, a rotating ring, a rolling bearing having a rolling element disposed between both wheels, a core metal fitted and fixed to the fixed ring, and a fixed-side seal member having an elastic seal attached to the metal core; A rotation-side seal member having a cylindrical portion fitted and fixed to the rotation wheel, a flange portion extending toward the fixed-side seal member connected to the axial end of the cylindrical portion, and a sensor provided on the fixed-side seal member; In a rolling bearing device comprising a magnetized body provided on the rotating side seal member and the sensor and the magnetized body facing each other in the axial direction, the core metal of the fixed side seal member has an axially inner portion serving as the fixed member. A cylindrical portion that is fitted and fixed; and a flange portion that is provided at an axially outer end portion of the cylindrical portion and extends toward the rotation-side seal member. Resin molded Cage, the flange portion of the rotated seal member is brought into a position axially outward of the fixed-side seal member, the elastic seal is provided by sliding contact with the rotating sealing member provided in the flange portion of the core, the core Sealing means is provided at a required portion of the boundary portion between the gold and the resin member, and the sealing means is provided at a contact portion between the resin portion and the cored bar which is on the inner side in the axial direction from the flange portion of the cored bar. a rolling bearing device comprising a liquid gasket der Rukoto. A fixed ring, a rotating ring, a rolling bearing having a rolling element disposed between both wheels, a core metal fitted and fixed to the fixed ring, and a fixed-side seal member having an elastic seal attached to the metal core; A rotation-side seal member having a cylindrical portion fitted and fixed to the rotation wheel, a flange portion extending toward the fixed-side seal member connected to the axial end of the cylindrical portion, and a sensor provided on the fixed-side seal member; In a rolling bearing device comprising a magnetized body provided on the rotating side seal member and the sensor and the magnetized body facing each other in the axial direction, the core metal of the fixed side seal member has an axially inner portion serving as the fixed member. A cylindrical portion that is fitted and fixed; and a flange portion that is provided at an axially outer end portion of the cylindrical portion and extends toward the rotation-side seal member. Resin molded The flange portion of the rotation side seal member is positioned outside the axial direction of the fixed side seal member, and the elastic seal is provided on the flange portion of the cored bar and is in sliding contact with the rotation side seal member. A rolling bearing device characterized in that sealing means is provided at a required portion of a boundary portion between the gold and the resin member, and the sealing means is an adhesive layer interposed between the core metal and the resin. A fixed ring, a rotating ring, a rolling bearing having a rolling element disposed between both wheels, a core metal fitted and fixed to the fixed ring, and a fixed-side seal member having an elastic seal attached to the metal core; A rotation-side seal member having a cylindrical portion fitted and fixed to the rotation wheel, a flange portion extending toward the fixed-side seal member connected to the axial end of the cylindrical portion, and a sensor provided on the fixed-side seal member; In a rolling bearing device comprising a magnetized body provided on the rotating side seal member and the sensor and the magnetized body facing each other in the axial direction, the core metal of the fixed side seal member has an axially inner portion serving as the fixed member. A cylindrical portion that is fitted and fixed; and a flange portion that is provided at an axially outer end portion of the cylindrical portion and extends toward the rotation-side seal member. Resin molded The flange portion of the rotation side seal member is positioned outside the axial direction of the fixed side seal member, and the elastic seal is provided on the flange portion of the cored bar and is in sliding contact with the rotation side seal member. Sealing means is provided at a required portion of the boundary portion between the gold and the resin member, and the cylindrical portion of the cored bar has a small diameter portion fitted and fixed to the fixing member, and a step portion on the outer side in the axial direction of the small diameter portion. The flange portion of the metal core is provided at the axially outer end portion of the large diameter portion, between the step portion of the cylindrical portion of the metal core and the resin member, and the flange portion of the metal core. A rolling bearing device in which an O-ring as a sealing means is provided between the resin member and the resin member. A fixed ring, a rotating ring, a rolling bearing having a rolling element disposed between both wheels, a core metal fitted and fixed to the fixed ring, and a fixed-side seal member having an elastic seal attached to the metal core; A rotation-side seal member having a cylindrical portion fitted and fixed to the rotation wheel, a flange portion extending toward the fixed-side seal member connected to the axial end of the cylindrical portion, and a sensor provided on the fixed-side seal member; In a rolling bearing device comprising a magnetized body provided on the rotating side seal member and the sensor and the magnetized body facing each other in the axial direction, the core metal of the fixed side seal member has an axially inner portion serving as the fixed member. A cylindrical portion that is fitted and fixed; and a flange portion that is provided at an axially outer end portion of the cylindrical portion and extends toward the rotation-side seal member. Resin molded The flange portion of the rotation side seal member is positioned outside the axial direction of the fixed side seal member, and the elastic seal is provided on the flange portion of the cored bar and is in sliding contact with the rotation side seal member. Sealing means is provided at a required portion of the boundary portion between the gold and the resin member, and the flange portion of the core metal provided with the elastic seal and the cylindrical portion of the core metal fitted and fixed to the fixing member are: It is a separate member with a resin-filled gap between the axially outer end of the cylindrical part and the flange part, and is folded at the axially outer end of the cylindrical part of the cored bar on the side opposite to the rotating member. O-rings as sealing means are provided between the bent portion of the metal core and the resin member, and between the flange portion provided with the elastic seal and the resin member. A rolling bearing device characterized by comprising: Fixed ring is a body-side raceway member having a mounting portion to the vehicle body, is a wheel-side raceway member rotating wheel having a wheel attachment portion, claim 5, characterized in that it is used for an automotive hub unit 9. The rolling bearing device according to any one of up to 8 .

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