JP4193504B2 - Mounting structure of rolling bearing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention incorporates a sensor and pulsar ring for a rotation detector used in an automobile ABS (anti-lock brake system) or the like into a so-called pack seal, and the seal device incorporating the rotation detector is used between the inner and outer rings. The present invention relates to a mounting structure for a rolling bearing device in which a gap between the two is sealed.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a bearing device that rotatably supports an axle of an automobile with respect to a vehicle body, which includes a rotation detector used for ABS or the like (see, for example, Patent Document 1).
[0003]
The bearing device includes rolling elements between the raceway surfaces of the inner ring that is externally fitted to the axle and serves as a rotating ring, and the outer ring that is secured to the vehicle body and serves as a fixed ring, and a gap between the inner and outer rings is sealed by a sealing device. Has been.
[0004]
The rotation detector is configured to detect a change in a magnetic field of a pulsar ring fixed to an inner ring serving as a rotating wheel by a sensor, and the detection signal is transmitted to an electronic circuit of a vehicle body via a harness.
[0005]
[Patent Document 1]
JP-A-8-43411 [0006]
[Problems to be solved by the invention]
Usually, the sensor is fixed to the knuckle and the electronic circuit is provided on the vehicle body. For this reason, the vibration of the vehicle body is not transmitted to the knuckle because the knuckle is connected to the damper against the shaking of the vehicle body during traveling. Therefore, the electronic circuit provided in the vehicle body vibrates due to the shaking of the vehicle body, whereas the sensor fixed to the knuckle is not affected by the vibration of the vehicle body. For this reason, the harness connecting the sensor and the electronic circuit may be disconnected due to the vibration of the vehicle body.
[0007]
Further, recent ABS sensors are incorporated in a so-called pack seal, which is mounted on a bearing device, in order to save space.
[0008]
For this reason, when the sensor harness is disconnected and the ABS sensor malfunctions, it is necessary to replace the entire hub unit including the bearing device, which requires troublesome maintenance work and high costs. .
[0009]
[Means for Solving the Problems]
The present invention relates to a mounting structure for a rolling bearing device in which the rolling bearing device is fixed to a knuckle, wherein the rolling bearing device is disposed concentrically with an inner ring member serving as a rotating ring having a raceway surface. An outer ring member serving as a fixed ring having a raceway surface corresponding to the inner ring member and having a support flange on the outer periphery, a rolling element interposed between the raceway surfaces of the inner ring member and the outer ring member, the inner ring member, and A seal device that seals a gap between the outer ring members, and the seal device includes an outer ring side seal ring fixed to the outer ring member and an inner ring side seal ring fixed to the inner ring member, The outer ring side seal ring is covered with a resin outer cover and a magnetic sensor is integrated, a magnetic ring is fixed to the inner ring side seal ring, and the resin outer cover is arranged in the outer diameter direction. A connector connected to the magnetic sensor, wherein the magnetic sensor detects the magnetic ring to detect the rotation state of the inner ring member, and the connector is connected to the vehicle outer side of the knuckle. The support flange of the outer ring member is fixed to the knuckle with a mounting bolt in a state of being inserted into the notch formed in the upper part.
[0012]
As the rotation detector, for example, an active detector that changes the output according to the change of magnetic flux is used. The magnetic ring is a pulsar ring, and the magnetic sensor is two magnetic sensors arranged apart in the circumferential direction. There is a configured forward / reverse detection sensor.
[0013]
According to the onset bright, the sealing device, the rotation detector comprising a magnetic sensor and magnetic ring is integrally formed, and the resin sheathing body for molding the magnetic sensor, the connector connected to the magnetic sensor is continuously provided The seal device, the rotation detector, and the connector are integrated.
[0014]
The harness for connecting the magnetic sensor and the electronic circuit of the vehicle body has one end connected to the electronic circuit, and the other end has a connector that can be attached to and detached from the connector formed integrally with the magnetic sensor. Is connected to a connector integrally formed with the magnetic sensor, whereby the magnetic sensor and the electronic circuit are connected. In this way, when the harness is disconnected from the integrated body consisting of the seal device, rotation detector, and connector, when the harness is disconnected due to the shaking of the vehicle body during travel, only the harness is easily removed from the connector part and replaced. And maintenance is cheap and easy.
[0015]
By separating the harness from the integrated unit consisting of the seal device, rotation detector, and connector, the bearing device is fixed to the knuckle with the integrated unit consisting of the seal device, rotation detector, and connector attached to the bearing device. At the same time, there is no harness that interferes with the fixing work, and the vehicle mounting property is improved.
[0016]
The outer ring side seal ring is molded with a resin outer casing and a magnetic sensor is provided. The inner ring side seal ring is provided with a magnetic ring, and the magnetic sensor and magnetic ring are integrated with the seal device. As a result, the rotation detector can be made compact.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
[0018]
1 is a cross-sectional view showing an overall configuration of a rolling bearing device for a vehicle according to the present embodiment, FIG. 2 is an enlarged cross-sectional view of a main part of FIG. 1, FIG. 3 is an enlarged cross-sectional view of a seal device portion of FIG. FIGS. 5A and 5B are perspective views of the sealing device of FIG. 2, FIGS. 5A and 5B are diagrams showing the phase relationship of detection signals of two magnetic sensors, and FIG. FIG.
[0019]
The rolling bearing device 1 of this embodiment is used on the drive wheel side of an automobile, and in FIG. 1, the left side is the vehicle outer side and the right side is the vehicle inner side.
[0020]
Two rows of balls (an example of rolling elements) 4 and 5 disposed on the crown-shaped cage 6 at equal circumferential positions are respectively mounted on the outer ring member 2 that is supported non-rotatingly via a knuckle 9 on the vehicle body side. Thus, the inner ring member 3 is supported so as to be rotatable around the axis.
[0021]
A support flange 21 is formed on the outer peripheral surface of the outer ring member 2 so as to project outward in the radial direction. The support flange 21 is fixed to the knuckle 9 via the mounting bolt 10, so that the outer ring member 2 serves as a fixed ring. It is supported non-rotatingly by the car body.
[0022]
The inner ring member 3 includes a hub wheel 31 and a cylindrical member 32 that is separate from the hub wheel 31 and is fitted to the vehicle inner side of the body portion of the hub wheel 31. A part of the outer peripheral surface of the body portion of the hub wheel 31 is used as an inner ring raceway surface of the balls 4 on the vehicle outer side row, and an outer peripheral surface of the cylindrical member 32 is used as an inner ring raceway surface of the balls 5 on the vehicle inner side row. Two outer ring raceways for the balls 4 and 5 in both rows are formed on the inner peripheral surface of the outer ring member 2.
[0023]
The annular bearing space 11 between the outer ring member 2 and the inner ring member 3 is sealed on both sides in the axial direction to prevent the lubricant in the annular bearing space 11 from leaking to the outside, and muddy water or the like can be discharged from the outside. Sealing devices 7 and 8 are provided for preventing intrusion.
[0024]
A shaft portion 13 formed integrally with the saddle-shaped outer ring member 12 of a constant velocity joint (CVJ) is inserted into the center hole of the hub wheel 31 via a spline, and a nut 14 is provided at the vehicle outer side end portion of the shaft portion 13. By screwing and tightening the nut 14 against the end face of the recess 33 of the hub wheel 31, the necessary preload is applied to the balls 4 and 5 in both rows, and the saddle-shaped outer ring member 12 is connected to the inner ring member 3. It will be in the state integrated in rotation.
[0025]
A hub flange 34 projecting radially outward is integrally formed in the middle of the outer peripheral surface of the hub wheel 31. A brake disc rotor and a tire wheel are attached to the hub flange 34, and the wheel is attached to the tire wheel.
[0026]
The vehicle outer side sealing device 7 is formed, for example, by adhering a rubber lip slidably contacting the hub wheel 31 to an annular metal core fitted inside the outer ring member 2.
[0027]
The vehicle inner side sealing device 8 is configured by combining an outer ring side seal ring 81 serving as a sensor assembly and an inner ring side seal ring 82.
[0028]
The outer ring side seal ring 81 is attached to the outer ring member 2 side, and has a configuration in which a main lip 84 and an auxiliary lip 85 are attached to an annular cored bar 83 that is a metal ring. The annular cored bar 83 includes a cylindrical portion 83a along the axial direction, and an annular plate portion 83b formed by bending the axially inner end side of the cylindrical portion 83a inward in the radial direction.
[0029]
The inner ring side seal ring 82 is attached to the cylindrical member 32 side, and has a configuration in which an axial lip 87 and a radial lip 88 are attached to an annular cored bar 86. The annular core 86 includes a cylindrical portion 86a along the axial direction and an annular plate portion 86b formed by bending the axially outer end side of the cylindrical portion 86a outward in the radial direction.
[0030]
The lips 84, 85, 87, 88 are made of rubber such as nitrile butadiene rubber (NBR) and are vulcanized and bonded to the annular core bars 83, 86. The annular core 83 of the outer ring side seal ring 81 is formed of a nonmagnetic material such as nonmagnetic stainless steel.
[0031]
A forward / reverse detection sensor 15 serving as a magnetic sensor is integrated in the outer ring side seal ring 81, and a pulsar ring 16 serving as a magnetic ring is integrally incorporated in the inner ring side seal ring 82. The rotation of the cylindrical member 32 is detected by the pulsar ring 16.
[0032]
The forward / reverse detection sensor 15 is composed of, for example, two magnetic sensors that are spaced apart from each other in the circumferential direction, such as a Hall element or a magnetoresistive element, and can detect the rotational direction in addition to the rotational angle. As shown in FIG. 5, when one of the magnetic sensors outputs the rectangular wave signal of FIG. 5A, the other magnetic sensor is 90 degrees out of phase as shown in FIG. It arrange | positions so that the rectangular wave signal of 5 (B) may be output. The rotation direction of the inner ring 3 in the clockwise direction or the counterclockwise direction can be determined by the advance / delay of the phase of the detection signals of both magnetic sensors.
[0033]
As the forward / reverse detection sensor 15, as shown in FIG. 6, a Hall IC including two Hall elements 22 may be used. That is, with respect to the magnetization pitch λ of the pulsar ring 16, the two Hall elements 22 are arranged at an interval (λ / 4) at which the output phase of each pulsar ring 16 is 90 degrees, so that the rotation direction can be detected. The magnetization pitch λ is the total length of N pole and S pole magnetization.
[0034]
The forward / reverse detection sensor 15 is mounted in a non-contact manner on the outer peripheral surface of the cylindrical portion 83a of the annular cored bar 83 of the outer ring side seal ring 81, and has a thickness that covers the forward / reverse detection sensor 15 on the outer diameter of the cylindrical portion 83a. The resin exterior body 17 is provided by integral molding (insert molding). The resin exterior body 17 is made of engineering plastic such as polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), polyamide (PA), and the like.
[0035]
A connector 20 to which a harness (not shown) connected to an electronic circuit of the vehicle body is connected is integrally formed on the resin exterior body 17 so as to extend in the outer diameter direction. That is, the connector 20 is also formed of an engineering plastic such as PPS, PBT, PA, for example. A pin 19 is provided in the connector 20, and the forward / reverse detection sensor 15 and the pin 19 are connected by a signal line 18.
[0036]
4A and 4B are perspective views of a sealing device in which the connector 20 is integrally formed. 4A is a view seen from the front side oblique direction of the sealing device, and FIG. 4B is a view seen from the back side oblique direction of the sealing device. An annular outer ring contact surface 17 a that contacts the axial end surface 2 b of the outer ring member 2 is formed on the resin exterior body 17. In addition, you may provide the nail | claw for latching with the connector of the harness front-end | tip in the outer periphery of the connector 20. FIG.
[0037]
The pulsar ring 16 is formed by vulcanizing and molding rubber containing magnetic powder, and is magnetized, for example, in such a manner that N and S poles are alternately arranged in the circumferential direction. The pulsar ring 16 is fixed to a position where the forward / reverse detection sensor 15 can detect a change in the magnetic field of the pulsar ring 16 on the inner peripheral surface of the annular core 86 of the inner ring side seal ring 82. The sensing direction (inner diameter direction) of the forward / reverse detection sensor 15 and the magnetization direction (axial direction) of the pulsar ring 16 are orthogonal to each other.
[0038]
The sealing device 8 on the vehicle inner side is a state in which the outer ring side seal ring 81 and the inner ring side seal ring 82 are combined. With respect to the shoulder portion 2 a on the inner peripheral surface of the outer ring member 2, and with respect to the inner ring side seal ring 82 incorporating the pulsar ring 16, the annular core metal 86 is connected to the shoulder portion 32 a on the outer peripheral surface of the tubular member 32. Each is fitted with a tight fit by press fitting.
[0039]
In the state where the outer ring side seal ring 81 and the inner ring side seal ring 82 are combined, the forward / reverse detection sensor 15 is positioned at a position where a change in magnetic flux of the pulsar ring 16 can be detected. In addition, the sealing device 8 positions the outer ring contact surface 17 a in contact with the axial end surface 2 b of the outer ring member 2.
[0040]
Next, the rolling bearing device 1 is fixed to the knuckle 9. In the rolling bearing device 1, the vehicle inner side end portion of the outer ring member 2 is fitted into the knuckle 9, and the support flange 21 of the outer ring member 2 is fixed to the knuckle 9 with mounting bolts 10.
[0041]
The knuckle 9 is formed in a cylindrical shape except for a portion fixed to the support flange 21, and a notch 91 through which the connector 20 is inserted is formed on the outer side of the cylinder, and the connector 20 is notched. The rolling bearing device 1 is fixed to the knuckle 9 in a state of being inserted through 91.
[0042]
A harness (not shown) connected to the electronic circuit of the vehicle body is connected to the forward / reverse detection sensor 15. That is, a connector that can be attached to and detached from the connector 20 is provided at the tip of the harness, and the forward / reverse detection sensor 15 is connected to the electronic circuit of the vehicle body by connecting the connector of the harness to the connector 20.
[0043]
In the rolling bearing device 1, when the outer ring member 2 is fixedly arranged in a non-rotating manner and the inner ring member 3 is rotated, each magnetic pole of the pulsar ring 16 that rotates integrally with the inner ring member 3 includes two forward / reverse detection sensors 15. The magnetic sensor is sequentially opposed to the magnetic sensor. At this time, since the facing position of the pulsar ring 16 is sequentially changed with respect to the forward / reverse detection sensor 15, the direction of the magnetic flux emitted from the pulsar ring 16 is alternately changed, so that a rectangular wave signal is output from the forward / reverse detection sensor 15. The waveform period of this rectangular wave signal changes according to the rotational phase and rotational speed of the pulsar ring 16, and the rotational phase, rotational speed, rotational speed, rotational direction, etc. of the inner ring member 3 are obtained by waveform processing.
[0044]
According to the rolling bearing device 1 configured as described above, one end of the harness connecting the forward / reverse detection sensor 15 and the electronic circuit of the vehicle body is connected to the electronic circuit, and the other end is integrated with the forward / reverse detection sensor 15. The connector 20 is detachable with respect to the formed connector 20, and the connector of the harness is connected to the connector 20 formed integrally with the forward / reverse detection sensor 15, so that the forward / reverse detection sensor 15 and the electronic circuit are connected. The In this way, when the harness is separated from the integrated body composed of the seal device 8, the forward / reverse detection sensor 15, the pulsar ring 16, and the connector 20, the harness is disconnected only when the harness is disconnected due to the shaking of the vehicle body during traveling. It can be easily removed from the part and replaced, making maintenance inexpensive and easy.
[0045]
By separating the harness from the integrated unit composed of the seal device 8, the forward / reverse detection sensor 15, the pulsar ring 16, and the connector 20, the integrated unit composed of the seal device 8, the forward / reverse detection sensor 15, the pulsar ring 16, and the connector 20 is rolled. When the rolling bearing device 1 is fixed to the knuckle 9 in a state where it is mounted on the device 1, there is no harness that obstructs the fixing operation, and the vehicle mountability is improved.
[0046]
A pulsar ring 16 is provided on the inner surface of the annular cored bar 86 of the inner ring side seal ring 82. On the outer diameter side of the annular cored bar 83 of the outer ring side seal ring 81, it is molded by the resin outer casing 17 to detect forward / reverse. The sensor 15 is provided, and the pulsar ring 16 and the forward / reverse detection sensor 15 are integrated with the seal device 8 so that the rotation detector can be made compact and can be easily installed in a small space such as the drive wheel side.
[0047]
The pulsar ring 16 is fixed to the inner surface of the annular cored bar 86 of the inner ring side seal ring 82, and the forward / reverse detection sensor 15 is formed of a resin exterior on the outer diameter side of the annular cored bar 83 of the outer ring side seal ring 81. The body 17 is molded and integrated, and the sealing performance of the pulsar ring 16 and the forward / reverse detection sensor 15 is improved, and the dust resistance is excellent.
[0048]
The signal line 18 of the forward / reverse detection sensor 15 is molded by the resin exterior body 17, and the connecting portion between the forward / reverse detection sensor 15 and the signal line 18 is reinforced, and disconnection can be prevented. In addition, since the harness is separated, the weight of the harness is not applied to the resin exterior body 17 and the sealing performance of the resin exterior body 17 is deteriorated due to insufficient strength until the harness is attached to the connector 20. Can be prevented.
[0049]
The connector 20 is integrally formed on the resin outer casing 17 that molds the forward / reverse detection sensor 15 of the outer ring side seal ring 81, so that the insulation and vibration resistance are excellent, and the cost can be reduced.
[0050]
The connector 20 extending in the outer diameter direction is provided by being inserted through a notch 91 formed on the vehicle outer side of the knuckle 9, and it is necessary to form a through hole in the middle of the knuckle 9 in the axial direction as in the prior art. Therefore, it is possible to prevent the strength of the knuckle 9 from being lowered. In addition, in a state where the seal device 8 integrally formed with the connector 20 is mounted on the rolling bearing device 1, the connector 20 protruding in the outer diameter direction is fitted into the notch 91 from the vehicle outer side, so that the rolling bearing device 1 is provided. It can be easily fixed to the knuckle 9.
[0051]
Since the forward / reverse detection sensor 15 is molded by the resin exterior body 17 and integrally formed with the outer ring side seal ring 81, and the forward / reverse detection sensor 15 is protected from the external environment, the reliability is improved.
[0052]
The magnetic sensor is not limited to the forward / reverse detection sensor 15 but may be a sensor that simply detects the rotational speed of the axle. Further, the structure of the sealing device 8 is not limited to the above-described embodiment, and any structure that includes an outer ring side seal ring 81 serving as a sensor assembly may be used, and the arrangement form of the magnetic sensor and the magnetic body ring is not particularly limited. Absent. Furthermore, the configuration of the present invention may be applied not only to the drive wheel side as in the above embodiment but also to the driven wheel side.
[0053]
【The invention's effect】
According to the onset bright, with replacement of the harness disconnection is easily improves vehicle mountability of the bearing device, and downsizing of the rotation detector advantage of being able to obtain.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the overall configuration of a rolling bearing device for a vehicle according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of FIG.
FIG. 3 is an enlarged cross-sectional view of the sealing device portion of FIG. 2;
4A and 4B are perspective views of the sealing device of FIG. 2, respectively.
FIGS. 5A and 5B are diagrams showing phase relationships of detection signals of a forward / reverse detection sensor according to an embodiment of the present invention.
FIG. 6 is an explanatory diagram of a forward / reverse detection sensor according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rolling bearing apparatus 2 Outer ring member 3 Inner ring member 7, 8 Sealing device 9 Knuckle 15 Forward / reverse detection sensor (magnetic sensor)
16 Pulsar ring (magnetic ring)
17 Plastic exterior body 20 Connector 81 Outer ring side seal ring (sensor assembly)
82 Inner ring side seal ring

Claims (1)

A rolling bearing device mounting structure in which the rolling bearing device is fixed to a knuckle,
The rolling bearing device includes an inner ring member serving as a rotating ring having a raceway surface, and an outer ring member serving as a fixed ring having a raceway surface disposed concentrically with the inner ring member and corresponding to the inner ring member and having a support flange on the outer periphery. And rolling elements interposed between the raceway surfaces of the inner ring member and the outer ring member, and a sealing device that seals a gap between the inner ring member and the outer ring member,
The sealing device includes an outer ring side seal ring fixed to the outer ring member and an inner ring side seal ring fixed to the inner ring member, and the outer ring side seal ring is covered with a resin exterior body and integrated with a magnetic sensor. A magnetic ring is fixed to the inner ring side seal ring, a connector extending in the outer diameter direction and connected to the magnetic sensor is connected to the resin outer casing, and the magnetic ring is connected to the magnetic sensor by the magnetic sensor. And detecting the rotation state of the inner ring member,
A mounting structure for a rolling bearing device, wherein the support flange of the outer ring member is fixed to the knuckle with a mounting bolt in a state where the connector is inserted into a notch formed on the vehicle outer side of the knuckle. .

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